diff options
| author | Michael Tokarev <mjt@tls.msk.ru> | 2014-12-20 08:48:44 +0000 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2014-12-20 08:48:44 +0000 |
| commit | 489bea7ee8e1dbecfa517b8415568044ab57c73a (patch) | |
| tree | 44d4878d4c7da3f4908ea9a765ef9b8f9c141756 /super-intel.c | |
mdadm (3.3.2-5) unstable; urgency=medium
* use-tempnode-not-devnode.patch: change udev rules file to use
$tempnode which works both on wheezy and jessie udev, instead
of $devnode which only works in jessie. At this stage it is
better to make rules file compatible with old version instead
of adding versioned dependency. Should be removed for jessie+1.
(Closes: #770883)
* fix Closes: list in previous entry (Closes: #771852)
# imported from the archive
Diffstat (limited to 'super-intel.c')
| -rw-r--r-- | super-intel.c | 10626 |
1 files changed, 10626 insertions, 0 deletions
diff --git a/super-intel.c b/super-intel.c new file mode 100644 index 00000000..e28ac7d3 --- /dev/null +++ b/super-intel.c @@ -0,0 +1,10626 @@ +/* + * mdadm - Intel(R) Matrix Storage Manager Support + * + * Copyright (C) 2002-2008 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#define HAVE_STDINT_H 1 +#include "mdadm.h" +#include "mdmon.h" +#include "sha1.h" +#include "platform-intel.h" +#include <values.h> +#include <scsi/sg.h> +#include <ctype.h> +#include <dirent.h> + +/* MPB == Metadata Parameter Block */ +#define MPB_SIGNATURE "Intel Raid ISM Cfg Sig. " +#define MPB_SIG_LEN (strlen(MPB_SIGNATURE)) +#define MPB_VERSION_RAID0 "1.0.00" +#define MPB_VERSION_RAID1 "1.1.00" +#define MPB_VERSION_MANY_VOLUMES_PER_ARRAY "1.2.00" +#define MPB_VERSION_3OR4_DISK_ARRAY "1.2.01" +#define MPB_VERSION_RAID5 "1.2.02" +#define MPB_VERSION_5OR6_DISK_ARRAY "1.2.04" +#define MPB_VERSION_CNG "1.2.06" +#define MPB_VERSION_ATTRIBS "1.3.00" +#define MAX_SIGNATURE_LENGTH 32 +#define MAX_RAID_SERIAL_LEN 16 + +/* supports RAID0 */ +#define MPB_ATTRIB_RAID0 __cpu_to_le32(0x00000001) +/* supports RAID1 */ +#define MPB_ATTRIB_RAID1 __cpu_to_le32(0x00000002) +/* supports RAID10 */ +#define MPB_ATTRIB_RAID10 __cpu_to_le32(0x00000004) +/* supports RAID1E */ +#define MPB_ATTRIB_RAID1E __cpu_to_le32(0x00000008) +/* supports RAID5 */ +#define MPB_ATTRIB_RAID5 __cpu_to_le32(0x00000010) +/* supports RAID CNG */ +#define MPB_ATTRIB_RAIDCNG __cpu_to_le32(0x00000020) +/* supports expanded stripe sizes of 256K, 512K and 1MB */ +#define MPB_ATTRIB_EXP_STRIPE_SIZE __cpu_to_le32(0x00000040) + +/* The OROM Support RST Caching of Volumes */ +#define MPB_ATTRIB_NVM __cpu_to_le32(0x02000000) +/* The OROM supports creating disks greater than 2TB */ +#define MPB_ATTRIB_2TB_DISK __cpu_to_le32(0x04000000) +/* The OROM supports Bad Block Management */ +#define MPB_ATTRIB_BBM __cpu_to_le32(0x08000000) + +/* THe OROM Supports NVM Caching of Volumes */ +#define MPB_ATTRIB_NEVER_USE2 __cpu_to_le32(0x10000000) +/* The OROM supports creating volumes greater than 2TB */ +#define MPB_ATTRIB_2TB __cpu_to_le32(0x20000000) +/* originally for PMP, now it's wasted b/c. Never use this bit! */ +#define MPB_ATTRIB_NEVER_USE __cpu_to_le32(0x40000000) +/* Verify MPB contents against checksum after reading MPB */ +#define MPB_ATTRIB_CHECKSUM_VERIFY __cpu_to_le32(0x80000000) + +/* Define all supported attributes that have to be accepted by mdadm + */ +#define MPB_ATTRIB_SUPPORTED (MPB_ATTRIB_CHECKSUM_VERIFY | \ + MPB_ATTRIB_2TB | \ + MPB_ATTRIB_2TB_DISK | \ + MPB_ATTRIB_RAID0 | \ + MPB_ATTRIB_RAID1 | \ + MPB_ATTRIB_RAID10 | \ + MPB_ATTRIB_RAID5 | \ + MPB_ATTRIB_EXP_STRIPE_SIZE) + +/* Define attributes that are unused but not harmful */ +#define MPB_ATTRIB_IGNORED (MPB_ATTRIB_NEVER_USE) + +#define MPB_SECTOR_CNT 2210 +#define IMSM_RESERVED_SECTORS 4096 +#define NUM_BLOCKS_DIRTY_STRIPE_REGION 2056 +#define SECT_PER_MB_SHIFT 11 + +/* Disk configuration info. */ +#define IMSM_MAX_DEVICES 255 +struct imsm_disk { + __u8 serial[MAX_RAID_SERIAL_LEN];/* 0xD8 - 0xE7 ascii serial number */ + __u32 total_blocks_lo; /* 0xE8 - 0xEB total blocks lo */ + __u32 scsi_id; /* 0xEC - 0xEF scsi ID */ +#define SPARE_DISK __cpu_to_le32(0x01) /* Spare */ +#define CONFIGURED_DISK __cpu_to_le32(0x02) /* Member of some RaidDev */ +#define FAILED_DISK __cpu_to_le32(0x04) /* Permanent failure */ + __u32 status; /* 0xF0 - 0xF3 */ + __u32 owner_cfg_num; /* which config 0,1,2... owns this disk */ + __u32 total_blocks_hi; /* 0xF4 - 0xF5 total blocks hi */ +#define IMSM_DISK_FILLERS 3 + __u32 filler[IMSM_DISK_FILLERS]; /* 0xF5 - 0x107 MPB_DISK_FILLERS for future expansion */ +}; + +/* map selector for map managment + */ +#define MAP_0 0 +#define MAP_1 1 +#define MAP_X -1 + +/* RAID map configuration infos. */ +struct imsm_map { + __u32 pba_of_lba0_lo; /* start address of partition */ + __u32 blocks_per_member_lo;/* blocks per member */ + __u32 num_data_stripes_lo; /* number of data stripes */ + __u16 blocks_per_strip; + __u8 map_state; /* Normal, Uninitialized, Degraded, Failed */ +#define IMSM_T_STATE_NORMAL 0 +#define IMSM_T_STATE_UNINITIALIZED 1 +#define IMSM_T_STATE_DEGRADED 2 +#define IMSM_T_STATE_FAILED 3 + __u8 raid_level; +#define IMSM_T_RAID0 0 +#define IMSM_T_RAID1 1 +#define IMSM_T_RAID5 5 /* since metadata version 1.2.02 ? */ + __u8 num_members; /* number of member disks */ + __u8 num_domains; /* number of parity domains */ + __u8 failed_disk_num; /* valid only when state is degraded */ + __u8 ddf; + __u32 pba_of_lba0_hi; + __u32 blocks_per_member_hi; + __u32 num_data_stripes_hi; + __u32 filler[4]; /* expansion area */ +#define IMSM_ORD_REBUILD (1 << 24) + __u32 disk_ord_tbl[1]; /* disk_ord_tbl[num_members], + * top byte contains some flags + */ +} __attribute__ ((packed)); + +struct imsm_vol { + __u32 curr_migr_unit; + __u32 checkpoint_id; /* id to access curr_migr_unit */ + __u8 migr_state; /* Normal or Migrating */ +#define MIGR_INIT 0 +#define MIGR_REBUILD 1 +#define MIGR_VERIFY 2 /* analagous to echo check > sync_action */ +#define MIGR_GEN_MIGR 3 +#define MIGR_STATE_CHANGE 4 +#define MIGR_REPAIR 5 + __u8 migr_type; /* Initializing, Rebuilding, ... */ + __u8 dirty; + __u8 fs_state; /* fast-sync state for CnG (0xff == disabled) */ + __u16 verify_errors; /* number of mismatches */ + __u16 bad_blocks; /* number of bad blocks during verify */ + __u32 filler[4]; + struct imsm_map map[1]; + /* here comes another one if migr_state */ +} __attribute__ ((packed)); + +struct imsm_dev { + __u8 volume[MAX_RAID_SERIAL_LEN]; + __u32 size_low; + __u32 size_high; +#define DEV_BOOTABLE __cpu_to_le32(0x01) +#define DEV_BOOT_DEVICE __cpu_to_le32(0x02) +#define DEV_READ_COALESCING __cpu_to_le32(0x04) +#define DEV_WRITE_COALESCING __cpu_to_le32(0x08) +#define DEV_LAST_SHUTDOWN_DIRTY __cpu_to_le32(0x10) +#define DEV_HIDDEN_AT_BOOT __cpu_to_le32(0x20) +#define DEV_CURRENTLY_HIDDEN __cpu_to_le32(0x40) +#define DEV_VERIFY_AND_FIX __cpu_to_le32(0x80) +#define DEV_MAP_STATE_UNINIT __cpu_to_le32(0x100) +#define DEV_NO_AUTO_RECOVERY __cpu_to_le32(0x200) +#define DEV_CLONE_N_GO __cpu_to_le32(0x400) +#define DEV_CLONE_MAN_SYNC __cpu_to_le32(0x800) +#define DEV_CNG_MASTER_DISK_NUM __cpu_to_le32(0x1000) + __u32 status; /* Persistent RaidDev status */ + __u32 reserved_blocks; /* Reserved blocks at beginning of volume */ + __u8 migr_priority; + __u8 num_sub_vols; + __u8 tid; + __u8 cng_master_disk; + __u16 cache_policy; + __u8 cng_state; + __u8 cng_sub_state; +#define IMSM_DEV_FILLERS 10 + __u32 filler[IMSM_DEV_FILLERS]; + struct imsm_vol vol; +} __attribute__ ((packed)); + +struct imsm_super { + __u8 sig[MAX_SIGNATURE_LENGTH]; /* 0x00 - 0x1F */ + __u32 check_sum; /* 0x20 - 0x23 MPB Checksum */ + __u32 mpb_size; /* 0x24 - 0x27 Size of MPB */ + __u32 family_num; /* 0x28 - 0x2B Checksum from first time this config was written */ + __u32 generation_num; /* 0x2C - 0x2F Incremented each time this array's MPB is written */ + __u32 error_log_size; /* 0x30 - 0x33 in bytes */ + __u32 attributes; /* 0x34 - 0x37 */ + __u8 num_disks; /* 0x38 Number of configured disks */ + __u8 num_raid_devs; /* 0x39 Number of configured volumes */ + __u8 error_log_pos; /* 0x3A */ + __u8 fill[1]; /* 0x3B */ + __u32 cache_size; /* 0x3c - 0x40 in mb */ + __u32 orig_family_num; /* 0x40 - 0x43 original family num */ + __u32 pwr_cycle_count; /* 0x44 - 0x47 simulated power cycle count for array */ + __u32 bbm_log_size; /* 0x48 - 0x4B - size of bad Block Mgmt Log in bytes */ +#define IMSM_FILLERS 35 + __u32 filler[IMSM_FILLERS]; /* 0x4C - 0xD7 RAID_MPB_FILLERS */ + struct imsm_disk disk[1]; /* 0xD8 diskTbl[numDisks] */ + /* here comes imsm_dev[num_raid_devs] */ + /* here comes BBM logs */ +} __attribute__ ((packed)); + +#define BBM_LOG_MAX_ENTRIES 254 + +struct bbm_log_entry { + __u64 defective_block_start; +#define UNREADABLE 0xFFFFFFFF + __u32 spare_block_offset; + __u16 remapped_marked_count; + __u16 disk_ordinal; +} __attribute__ ((__packed__)); + +struct bbm_log { + __u32 signature; /* 0xABADB10C */ + __u32 entry_count; + __u32 reserved_spare_block_count; /* 0 */ + __u32 reserved; /* 0xFFFF */ + __u64 first_spare_lba; + struct bbm_log_entry mapped_block_entries[BBM_LOG_MAX_ENTRIES]; +} __attribute__ ((__packed__)); + +#ifndef MDASSEMBLE +static char *map_state_str[] = { "normal", "uninitialized", "degraded", "failed" }; +#endif + +#define RAID_DISK_RESERVED_BLOCKS_IMSM_HI 2209 + +#define GEN_MIGR_AREA_SIZE 2048 /* General Migration Copy Area size in blocks */ + +#define MIGR_REC_BUF_SIZE 512 /* size of migr_record i/o buffer */ +#define MIGR_REC_POSITION 512 /* migr_record position offset on disk, + * MIGR_REC_BUF_SIZE <= MIGR_REC_POSITION + */ + +#define UNIT_SRC_NORMAL 0 /* Source data for curr_migr_unit must + * be recovered using srcMap */ +#define UNIT_SRC_IN_CP_AREA 1 /* Source data for curr_migr_unit has + * already been migrated and must + * be recovered from checkpoint area */ +struct migr_record { + __u32 rec_status; /* Status used to determine how to restart + * migration in case it aborts + * in some fashion */ + __u32 curr_migr_unit; /* 0..numMigrUnits-1 */ + __u32 family_num; /* Family number of MPB + * containing the RaidDev + * that is migrating */ + __u32 ascending_migr; /* True if migrating in increasing + * order of lbas */ + __u32 blocks_per_unit; /* Num disk blocks per unit of operation */ + __u32 dest_depth_per_unit; /* Num member blocks each destMap + * member disk + * advances per unit-of-operation */ + __u32 ckpt_area_pba; /* Pba of first block of ckpt copy area */ + __u32 dest_1st_member_lba; /* First member lba on first + * stripe of destination */ + __u32 num_migr_units; /* Total num migration units-of-op */ + __u32 post_migr_vol_cap; /* Size of volume after + * migration completes */ + __u32 post_migr_vol_cap_hi; /* Expansion space for LBA64 */ + __u32 ckpt_read_disk_num; /* Which member disk in destSubMap[0] the + * migration ckpt record was read from + * (for recovered migrations) */ +} __attribute__ ((__packed__)); + +struct md_list { + /* usage marker: + * 1: load metadata + * 2: metadata does not match + * 4: already checked + */ + int used; + char *devname; + int found; + int container; + dev_t st_rdev; + struct md_list *next; +}; + +#define pr_vrb(fmt, arg...) (void) (verbose && pr_err(fmt, ##arg)) + +static __u8 migr_type(struct imsm_dev *dev) +{ + if (dev->vol.migr_type == MIGR_VERIFY && + dev->status & DEV_VERIFY_AND_FIX) + return MIGR_REPAIR; + else + return dev->vol.migr_type; +} + +static void set_migr_type(struct imsm_dev *dev, __u8 migr_type) +{ + /* for compatibility with older oroms convert MIGR_REPAIR, into + * MIGR_VERIFY w/ DEV_VERIFY_AND_FIX status + */ + if (migr_type == MIGR_REPAIR) { + dev->vol.migr_type = MIGR_VERIFY; + dev->status |= DEV_VERIFY_AND_FIX; + } else { + dev->vol.migr_type = migr_type; + dev->status &= ~DEV_VERIFY_AND_FIX; + } +} + +static unsigned int sector_count(__u32 bytes) +{ + return ROUND_UP(bytes, 512) / 512; +} + +static unsigned int mpb_sectors(struct imsm_super *mpb) +{ + return sector_count(__le32_to_cpu(mpb->mpb_size)); +} + +struct intel_dev { + struct imsm_dev *dev; + struct intel_dev *next; + unsigned index; +}; + +struct intel_hba { + enum sys_dev_type type; + char *path; + char *pci_id; + struct intel_hba *next; +}; + +enum action { + DISK_REMOVE = 1, + DISK_ADD +}; +/* internal representation of IMSM metadata */ +struct intel_super { + union { + void *buf; /* O_DIRECT buffer for reading/writing metadata */ + struct imsm_super *anchor; /* immovable parameters */ + }; + union { + void *migr_rec_buf; /* buffer for I/O operations */ + struct migr_record *migr_rec; /* migration record */ + }; + int clean_migration_record_by_mdmon; /* when reshape is switched to next + array, it indicates that mdmon is allowed to clean migration + record */ + size_t len; /* size of the 'buf' allocation */ + void *next_buf; /* for realloc'ing buf from the manager */ + size_t next_len; + int updates_pending; /* count of pending updates for mdmon */ + int current_vol; /* index of raid device undergoing creation */ + unsigned long long create_offset; /* common start for 'current_vol' */ + __u32 random; /* random data for seeding new family numbers */ + struct intel_dev *devlist; + struct dl { + struct dl *next; + int index; + __u8 serial[MAX_RAID_SERIAL_LEN]; + int major, minor; + char *devname; + struct imsm_disk disk; + int fd; + int extent_cnt; + struct extent *e; /* for determining freespace @ create */ + int raiddisk; /* slot to fill in autolayout */ + enum action action; + } *disks, *current_disk; + struct dl *disk_mgmt_list; /* list of disks to add/remove while mdmon + active */ + struct dl *missing; /* disks removed while we weren't looking */ + struct bbm_log *bbm_log; + struct intel_hba *hba; /* device path of the raid controller for this metadata */ + const struct imsm_orom *orom; /* platform firmware support */ + struct intel_super *next; /* (temp) list for disambiguating family_num */ +}; + +struct intel_disk { + struct imsm_disk disk; + #define IMSM_UNKNOWN_OWNER (-1) + int owner; + struct intel_disk *next; +}; + +struct extent { + unsigned long long start, size; +}; + +/* definitions of reshape process types */ +enum imsm_reshape_type { + CH_TAKEOVER, + CH_MIGRATION, + CH_ARRAY_SIZE, +}; + +/* definition of messages passed to imsm_process_update */ +enum imsm_update_type { + update_activate_spare, + update_create_array, + update_kill_array, + update_rename_array, + update_add_remove_disk, + update_reshape_container_disks, + update_reshape_migration, + update_takeover, + update_general_migration_checkpoint, + update_size_change, +}; + +struct imsm_update_activate_spare { + enum imsm_update_type type; + struct dl *dl; + int slot; + int array; + struct imsm_update_activate_spare *next; +}; + +struct geo_params { + char devnm[32]; + char *dev_name; + unsigned long long size; + int level; + int layout; + int chunksize; + int raid_disks; +}; + +enum takeover_direction { + R10_TO_R0, + R0_TO_R10 +}; +struct imsm_update_takeover { + enum imsm_update_type type; + int subarray; + enum takeover_direction direction; +}; + +struct imsm_update_reshape { + enum imsm_update_type type; + int old_raid_disks; + int new_raid_disks; + + int new_disks[1]; /* new_raid_disks - old_raid_disks makedev number */ +}; + +struct imsm_update_reshape_migration { + enum imsm_update_type type; + int old_raid_disks; + int new_raid_disks; + /* fields for array migration changes + */ + int subdev; + int new_level; + int new_layout; + int new_chunksize; + + int new_disks[1]; /* new_raid_disks - old_raid_disks makedev number */ +}; + +struct imsm_update_size_change { + enum imsm_update_type type; + int subdev; + long long new_size; +}; + +struct imsm_update_general_migration_checkpoint { + enum imsm_update_type type; + __u32 curr_migr_unit; +}; + +struct disk_info { + __u8 serial[MAX_RAID_SERIAL_LEN]; +}; + +struct imsm_update_create_array { + enum imsm_update_type type; + int dev_idx; + struct imsm_dev dev; +}; + +struct imsm_update_kill_array { + enum imsm_update_type type; + int dev_idx; +}; + +struct imsm_update_rename_array { + enum imsm_update_type type; + __u8 name[MAX_RAID_SERIAL_LEN]; + int dev_idx; +}; + +struct imsm_update_add_remove_disk { + enum imsm_update_type type; +}; + +static const char *_sys_dev_type[] = { + [SYS_DEV_UNKNOWN] = "Unknown", + [SYS_DEV_SAS] = "SAS", + [SYS_DEV_SATA] = "SATA" +}; + +const char *get_sys_dev_type(enum sys_dev_type type) +{ + if (type >= SYS_DEV_MAX) + type = SYS_DEV_UNKNOWN; + + return _sys_dev_type[type]; +} + +static struct intel_hba * alloc_intel_hba(struct sys_dev *device) +{ + struct intel_hba *result = xmalloc(sizeof(*result)); + + result->type = device->type; + result->path = xstrdup(device->path); + result->next = NULL; + if (result->path && (result->pci_id = strrchr(result->path, '/')) != NULL) + result->pci_id++; + + return result; +} + +static struct intel_hba * find_intel_hba(struct intel_hba *hba, struct sys_dev *device) +{ + struct intel_hba *result=NULL; + for (result = hba; result; result = result->next) { + if (result->type == device->type && strcmp(result->path, device->path) == 0) + break; + } + return result; +} + +static int attach_hba_to_super(struct intel_super *super, struct sys_dev *device) +{ + struct intel_hba *hba; + + /* check if disk attached to Intel HBA */ + hba = find_intel_hba(super->hba, device); + if (hba != NULL) + return 1; + /* Check if HBA is already attached to super */ + if (super->hba == NULL) { + super->hba = alloc_intel_hba(device); + return 1; + } else + /* IMSM metadata disallows to attach disks to multiple + * controllers. + */ + return 2; +} + +static struct sys_dev* find_disk_attached_hba(int fd, const char *devname) +{ + struct sys_dev *list, *elem; + char *disk_path; + + if ((list = find_intel_devices()) == NULL) + return 0; + + if (fd < 0) + disk_path = (char *) devname; + else + disk_path = diskfd_to_devpath(fd); + + if (!disk_path) + return 0; + + for (elem = list; elem; elem = elem->next) + if (path_attached_to_hba(disk_path, elem->path)) + return elem; + + if (disk_path != devname) + free(disk_path); + + return NULL; +} + +static int find_intel_hba_capability(int fd, struct intel_super *super, + char *devname); + +static struct supertype *match_metadata_desc_imsm(char *arg) +{ + struct supertype *st; + + if (strcmp(arg, "imsm") != 0 && + strcmp(arg, "default") != 0 + ) + return NULL; + + st = xcalloc(1, sizeof(*st)); + st->ss = &super_imsm; + st->max_devs = IMSM_MAX_DEVICES; + st->minor_version = 0; + st->sb = NULL; + return st; +} + +#ifndef MDASSEMBLE +static __u8 *get_imsm_version(struct imsm_super *mpb) +{ + return &mpb->sig[MPB_SIG_LEN]; +} +#endif + +/* retrieve a disk directly from the anchor when the anchor is known to be + * up-to-date, currently only at load time + */ +static struct imsm_disk *__get_imsm_disk(struct imsm_super *mpb, __u8 index) +{ + if (index >= mpb->num_disks) + return NULL; + return &mpb->disk[index]; +} + +/* retrieve the disk description based on a index of the disk + * in the sub-array + */ +static struct dl *get_imsm_dl_disk(struct intel_super *super, __u8 index) +{ + struct dl *d; + + for (d = super->disks; d; d = d->next) + if (d->index == index) + return d; + + return NULL; +} +/* retrieve a disk from the parsed metadata */ +static struct imsm_disk *get_imsm_disk(struct intel_super *super, __u8 index) +{ + struct dl *dl; + + dl = get_imsm_dl_disk(super, index); + if (dl) + return &dl->disk; + + return NULL; +} + +/* generate a checksum directly from the anchor when the anchor is known to be + * up-to-date, currently only at load or write_super after coalescing + */ +static __u32 __gen_imsm_checksum(struct imsm_super *mpb) +{ + __u32 end = mpb->mpb_size / sizeof(end); + __u32 *p = (__u32 *) mpb; + __u32 sum = 0; + + while (end--) { + sum += __le32_to_cpu(*p); + p++; + } + + return sum - __le32_to_cpu(mpb->check_sum); +} + +static size_t sizeof_imsm_map(struct imsm_map *map) +{ + return sizeof(struct imsm_map) + sizeof(__u32) * (map->num_members - 1); +} + +struct imsm_map *get_imsm_map(struct imsm_dev *dev, int second_map) +{ + /* A device can have 2 maps if it is in the middle of a migration. + * If second_map is: + * MAP_0 - we return the first map + * MAP_1 - we return the second map if it exists, else NULL + * MAP_X - we return the second map if it exists, else the first + */ + struct imsm_map *map = &dev->vol.map[0]; + struct imsm_map *map2 = NULL; + + if (dev->vol.migr_state) + map2 = (void *)map + sizeof_imsm_map(map); + + switch (second_map) { + case MAP_0: + break; + case MAP_1: + map = map2; + break; + case MAP_X: + if (map2) + map = map2; + break; + default: + map = NULL; + } + return map; + +} + +/* return the size of the device. + * migr_state increases the returned size if map[0] were to be duplicated + */ +static size_t sizeof_imsm_dev(struct imsm_dev *dev, int migr_state) +{ + size_t size = sizeof(*dev) - sizeof(struct imsm_map) + + sizeof_imsm_map(get_imsm_map(dev, MAP_0)); + + /* migrating means an additional map */ + if (dev->vol.migr_state) + size += sizeof_imsm_map(get_imsm_map(dev, MAP_1)); + else if (migr_state) + size += sizeof_imsm_map(get_imsm_map(dev, MAP_0)); + + return size; +} + +#ifndef MDASSEMBLE +/* retrieve disk serial number list from a metadata update */ +static struct disk_info *get_disk_info(struct imsm_update_create_array *update) +{ + void *u = update; + struct disk_info *inf; + + inf = u + sizeof(*update) - sizeof(struct imsm_dev) + + sizeof_imsm_dev(&update->dev, 0); + + return inf; +} +#endif + +static struct imsm_dev *__get_imsm_dev(struct imsm_super *mpb, __u8 index) +{ + int offset; + int i; + void *_mpb = mpb; + + if (index >= mpb->num_raid_devs) + return NULL; + + /* devices start after all disks */ + offset = ((void *) &mpb->disk[mpb->num_disks]) - _mpb; + + for (i = 0; i <= index; i++) + if (i == index) + return _mpb + offset; + else + offset += sizeof_imsm_dev(_mpb + offset, 0); + + return NULL; +} + +static struct imsm_dev *get_imsm_dev(struct intel_super *super, __u8 index) +{ + struct intel_dev *dv; + + if (index >= super->anchor->num_raid_devs) + return NULL; + for (dv = super->devlist; dv; dv = dv->next) + if (dv->index == index) + return dv->dev; + return NULL; +} + +/* + * for second_map: + * == MAP_0 get first map + * == MAP_1 get second map + * == MAP_X than get map according to the current migr_state + */ +static __u32 get_imsm_ord_tbl_ent(struct imsm_dev *dev, + int slot, + int second_map) +{ + struct imsm_map *map; + + map = get_imsm_map(dev, second_map); + + /* top byte identifies disk under rebuild */ + return __le32_to_cpu(map->disk_ord_tbl[slot]); +} + +#define ord_to_idx(ord) (((ord) << 8) >> 8) +static __u32 get_imsm_disk_idx(struct imsm_dev *dev, int slot, int second_map) +{ + __u32 ord = get_imsm_ord_tbl_ent(dev, slot, second_map); + + return ord_to_idx(ord); +} + +static void set_imsm_ord_tbl_ent(struct imsm_map *map, int slot, __u32 ord) +{ + map->disk_ord_tbl[slot] = __cpu_to_le32(ord); +} + +static int get_imsm_disk_slot(struct imsm_map *map, unsigned idx) +{ + int slot; + __u32 ord; + + for (slot = 0; slot < map->num_members; slot++) { + ord = __le32_to_cpu(map->disk_ord_tbl[slot]); + if (ord_to_idx(ord) == idx) + return slot; + } + + return -1; +} + +static int get_imsm_raid_level(struct imsm_map *map) +{ + if (map->raid_level == 1) { + if (map->num_members == 2) + return 1; + else + return 10; + } + + return map->raid_level; +} + +static int cmp_extent(const void *av, const void *bv) +{ + const struct extent *a = av; + const struct extent *b = bv; + if (a->start < b->start) + return -1; + if (a->start > b->start) + return 1; + return 0; +} + +static int count_memberships(struct dl *dl, struct intel_super *super) +{ + int memberships = 0; + int i; + + for (i = 0; i < super->anchor->num_raid_devs; i++) { + struct imsm_dev *dev = get_imsm_dev(super, i); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + + if (get_imsm_disk_slot(map, dl->index) >= 0) + memberships++; + } + + return memberships; +} + +static __u32 imsm_min_reserved_sectors(struct intel_super *super); + +static int split_ull(unsigned long long n, __u32 *lo, __u32 *hi) +{ + if (lo == 0 || hi == 0) + return 1; + *lo = __le32_to_cpu((unsigned)n); + *hi = __le32_to_cpu((unsigned)(n >> 32)); + return 0; +} + +static unsigned long long join_u32(__u32 lo, __u32 hi) +{ + return (unsigned long long)__le32_to_cpu(lo) | + (((unsigned long long)__le32_to_cpu(hi)) << 32); +} + +static unsigned long long total_blocks(struct imsm_disk *disk) +{ + if (disk == NULL) + return 0; + return join_u32(disk->total_blocks_lo, disk->total_blocks_hi); +} + +static unsigned long long pba_of_lba0(struct imsm_map *map) +{ + if (map == NULL) + return 0; + return join_u32(map->pba_of_lba0_lo, map->pba_of_lba0_hi); +} + +static unsigned long long blocks_per_member(struct imsm_map *map) +{ + if (map == NULL) + return 0; + return join_u32(map->blocks_per_member_lo, map->blocks_per_member_hi); +} + +#ifndef MDASSEMBLE +static unsigned long long num_data_stripes(struct imsm_map *map) +{ + if (map == NULL) + return 0; + return join_u32(map->num_data_stripes_lo, map->num_data_stripes_hi); +} + +static void set_total_blocks(struct imsm_disk *disk, unsigned long long n) +{ + split_ull(n, &disk->total_blocks_lo, &disk->total_blocks_hi); +} +#endif + +static void set_pba_of_lba0(struct imsm_map *map, unsigned long long n) +{ + split_ull(n, &map->pba_of_lba0_lo, &map->pba_of_lba0_hi); +} + +static void set_blocks_per_member(struct imsm_map *map, unsigned long long n) +{ + split_ull(n, &map->blocks_per_member_lo, &map->blocks_per_member_hi); +} + +static void set_num_data_stripes(struct imsm_map *map, unsigned long long n) +{ + split_ull(n, &map->num_data_stripes_lo, &map->num_data_stripes_hi); +} + +static struct extent *get_extents(struct intel_super *super, struct dl *dl) +{ + /* find a list of used extents on the given physical device */ + struct extent *rv, *e; + int i; + int memberships = count_memberships(dl, super); + __u32 reservation; + + /* trim the reserved area for spares, so they can join any array + * regardless of whether the OROM has assigned sectors from the + * IMSM_RESERVED_SECTORS region + */ + if (dl->index == -1) + reservation = imsm_min_reserved_sectors(super); + else + reservation = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; + + rv = xcalloc(sizeof(struct extent), (memberships + 1)); + e = rv; + + for (i = 0; i < super->anchor->num_raid_devs; i++) { + struct imsm_dev *dev = get_imsm_dev(super, i); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + + if (get_imsm_disk_slot(map, dl->index) >= 0) { + e->start = pba_of_lba0(map); + e->size = blocks_per_member(map); + e++; + } + } + qsort(rv, memberships, sizeof(*rv), cmp_extent); + + /* determine the start of the metadata + * when no raid devices are defined use the default + * ...otherwise allow the metadata to truncate the value + * as is the case with older versions of imsm + */ + if (memberships) { + struct extent *last = &rv[memberships - 1]; + unsigned long long remainder; + + remainder = total_blocks(&dl->disk) - (last->start + last->size); + /* round down to 1k block to satisfy precision of the kernel + * 'size' interface + */ + remainder &= ~1UL; + /* make sure remainder is still sane */ + if (remainder < (unsigned)ROUND_UP(super->len, 512) >> 9) + remainder = ROUND_UP(super->len, 512) >> 9; + if (reservation > remainder) + reservation = remainder; + } + e->start = total_blocks(&dl->disk) - reservation; + e->size = 0; + return rv; +} + +/* try to determine how much space is reserved for metadata from + * the last get_extents() entry, otherwise fallback to the + * default + */ +static __u32 imsm_reserved_sectors(struct intel_super *super, struct dl *dl) +{ + struct extent *e; + int i; + __u32 rv; + + /* for spares just return a minimal reservation which will grow + * once the spare is picked up by an array + */ + if (dl->index == -1) + return MPB_SECTOR_CNT; + + e = get_extents(super, dl); + if (!e) + return MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; + + /* scroll to last entry */ + for (i = 0; e[i].size; i++) + continue; + + rv = total_blocks(&dl->disk) - e[i].start; + + free(e); + + return rv; +} + +static int is_spare(struct imsm_disk *disk) +{ + return (disk->status & SPARE_DISK) == SPARE_DISK; +} + +static int is_configured(struct imsm_disk *disk) +{ + return (disk->status & CONFIGURED_DISK) == CONFIGURED_DISK; +} + +static int is_failed(struct imsm_disk *disk) +{ + return (disk->status & FAILED_DISK) == FAILED_DISK; +} + +/* try to determine how much space is reserved for metadata from + * the last get_extents() entry on the smallest active disk, + * otherwise fallback to the default + */ +static __u32 imsm_min_reserved_sectors(struct intel_super *super) +{ + struct extent *e; + int i; + unsigned long long min_active; + __u32 remainder; + __u32 rv = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; + struct dl *dl, *dl_min = NULL; + + if (!super) + return rv; + + min_active = 0; + for (dl = super->disks; dl; dl = dl->next) { + if (dl->index < 0) + continue; + unsigned long long blocks = total_blocks(&dl->disk); + if (blocks < min_active || min_active == 0) { + dl_min = dl; + min_active = blocks; + } + } + if (!dl_min) + return rv; + + /* find last lba used by subarrays on the smallest active disk */ + e = get_extents(super, dl_min); + if (!e) + return rv; + for (i = 0; e[i].size; i++) + continue; + + remainder = min_active - e[i].start; + free(e); + + /* to give priority to recovery we should not require full + IMSM_RESERVED_SECTORS from the spare */ + rv = MPB_SECTOR_CNT + NUM_BLOCKS_DIRTY_STRIPE_REGION; + + /* if real reservation is smaller use that value */ + return (remainder < rv) ? remainder : rv; +} + +/* Return minimum size of a spare that can be used in this array*/ +static unsigned long long min_acceptable_spare_size_imsm(struct supertype *st) +{ + struct intel_super *super = st->sb; + struct dl *dl; + struct extent *e; + int i; + unsigned long long rv = 0; + + if (!super) + return rv; + /* find first active disk in array */ + dl = super->disks; + while (dl && (is_failed(&dl->disk) || dl->index == -1)) + dl = dl->next; + if (!dl) + return rv; + /* find last lba used by subarrays */ + e = get_extents(super, dl); + if (!e) + return rv; + for (i = 0; e[i].size; i++) + continue; + if (i > 0) + rv = e[i-1].start + e[i-1].size; + free(e); + + /* add the amount of space needed for metadata */ + rv = rv + imsm_min_reserved_sectors(super); + + return rv * 512; +} + +static int is_gen_migration(struct imsm_dev *dev); + +#ifndef MDASSEMBLE +static __u64 blocks_per_migr_unit(struct intel_super *super, + struct imsm_dev *dev); + +static void print_imsm_dev(struct intel_super *super, + struct imsm_dev *dev, + char *uuid, + int disk_idx) +{ + __u64 sz; + int slot, i; + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_map *map2 = get_imsm_map(dev, MAP_1); + __u32 ord; + + printf("\n"); + printf("[%.16s]:\n", dev->volume); + printf(" UUID : %s\n", uuid); + printf(" RAID Level : %d", get_imsm_raid_level(map)); + if (map2) + printf(" <-- %d", get_imsm_raid_level(map2)); + printf("\n"); + printf(" Members : %d", map->num_members); + if (map2) + printf(" <-- %d", map2->num_members); + printf("\n"); + printf(" Slots : ["); + for (i = 0; i < map->num_members; i++) { + ord = get_imsm_ord_tbl_ent(dev, i, MAP_0); + printf("%s", ord & IMSM_ORD_REBUILD ? "_" : "U"); + } + printf("]"); + if (map2) { + printf(" <-- ["); + for (i = 0; i < map2->num_members; i++) { + ord = get_imsm_ord_tbl_ent(dev, i, MAP_1); + printf("%s", ord & IMSM_ORD_REBUILD ? "_" : "U"); + } + printf("]"); + } + printf("\n"); + printf(" Failed disk : "); + if (map->failed_disk_num == 0xff) + printf("none"); + else + printf("%i", map->failed_disk_num); + printf("\n"); + slot = get_imsm_disk_slot(map, disk_idx); + if (slot >= 0) { + ord = get_imsm_ord_tbl_ent(dev, slot, MAP_X); + printf(" This Slot : %d%s\n", slot, + ord & IMSM_ORD_REBUILD ? " (out-of-sync)" : ""); + } else + printf(" This Slot : ?\n"); + sz = __le32_to_cpu(dev->size_high); + sz <<= 32; + sz += __le32_to_cpu(dev->size_low); + printf(" Array Size : %llu%s\n", (unsigned long long)sz, + human_size(sz * 512)); + sz = blocks_per_member(map); + printf(" Per Dev Size : %llu%s\n", (unsigned long long)sz, + human_size(sz * 512)); + printf(" Sector Offset : %llu\n", + pba_of_lba0(map)); + printf(" Num Stripes : %llu\n", + num_data_stripes(map)); + printf(" Chunk Size : %u KiB", + __le16_to_cpu(map->blocks_per_strip) / 2); + if (map2) + printf(" <-- %u KiB", + __le16_to_cpu(map2->blocks_per_strip) / 2); + printf("\n"); + printf(" Reserved : %d\n", __le32_to_cpu(dev->reserved_blocks)); + printf(" Migrate State : "); + if (dev->vol.migr_state) { + if (migr_type(dev) == MIGR_INIT) + printf("initialize\n"); + else if (migr_type(dev) == MIGR_REBUILD) + printf("rebuild\n"); + else if (migr_type(dev) == MIGR_VERIFY) + printf("check\n"); + else if (migr_type(dev) == MIGR_GEN_MIGR) + printf("general migration\n"); + else if (migr_type(dev) == MIGR_STATE_CHANGE) + printf("state change\n"); + else if (migr_type(dev) == MIGR_REPAIR) + printf("repair\n"); + else + printf("<unknown:%d>\n", migr_type(dev)); + } else + printf("idle\n"); + printf(" Map State : %s", map_state_str[map->map_state]); + if (dev->vol.migr_state) { + struct imsm_map *map = get_imsm_map(dev, MAP_1); + + printf(" <-- %s", map_state_str[map->map_state]); + printf("\n Checkpoint : %u ", + __le32_to_cpu(dev->vol.curr_migr_unit)); + if ((is_gen_migration(dev)) && ((slot > 1) || (slot < 0))) + printf("(N/A)"); + else + printf("(%llu)", (unsigned long long) + blocks_per_migr_unit(super, dev)); + } + printf("\n"); + printf(" Dirty State : %s\n", dev->vol.dirty ? "dirty" : "clean"); +} + +static void print_imsm_disk(struct imsm_disk *disk, int index, __u32 reserved) +{ + char str[MAX_RAID_SERIAL_LEN + 1]; + __u64 sz; + + if (index < -1 || !disk) + return; + + printf("\n"); + snprintf(str, MAX_RAID_SERIAL_LEN + 1, "%s", disk->serial); + if (index >= 0) + printf(" Disk%02d Serial : %s\n", index, str); + else + printf(" Disk Serial : %s\n", str); + printf(" State :%s%s%s\n", is_spare(disk) ? " spare" : "", + is_configured(disk) ? " active" : "", + is_failed(disk) ? " failed" : ""); + printf(" Id : %08x\n", __le32_to_cpu(disk->scsi_id)); + sz = total_blocks(disk) - reserved; + printf(" Usable Size : %llu%s\n", (unsigned long long)sz, + human_size(sz * 512)); +} + +void examine_migr_rec_imsm(struct intel_super *super) +{ + struct migr_record *migr_rec = super->migr_rec; + struct imsm_super *mpb = super->anchor; + int i; + + for (i = 0; i < mpb->num_raid_devs; i++) { + struct imsm_dev *dev = __get_imsm_dev(mpb, i); + struct imsm_map *map; + int slot = -1; + + if (is_gen_migration(dev) == 0) + continue; + + printf("\nMigration Record Information:"); + + /* first map under migration */ + map = get_imsm_map(dev, MAP_0); + if (map) + slot = get_imsm_disk_slot(map, super->disks->index); + if ((map == NULL) || (slot > 1) || (slot < 0)) { + printf(" Empty\n "); + printf("Examine one of first two disks in array\n"); + break; + } + printf("\n Status : "); + if (__le32_to_cpu(migr_rec->rec_status) == UNIT_SRC_NORMAL) + printf("Normal\n"); + else + printf("Contains Data\n"); + printf(" Current Unit : %u\n", + __le32_to_cpu(migr_rec->curr_migr_unit)); + printf(" Family : %u\n", + __le32_to_cpu(migr_rec->family_num)); + printf(" Ascending : %u\n", + __le32_to_cpu(migr_rec->ascending_migr)); + printf(" Blocks Per Unit : %u\n", + __le32_to_cpu(migr_rec->blocks_per_unit)); + printf(" Dest. Depth Per Unit : %u\n", + __le32_to_cpu(migr_rec->dest_depth_per_unit)); + printf(" Checkpoint Area pba : %u\n", + __le32_to_cpu(migr_rec->ckpt_area_pba)); + printf(" First member lba : %u\n", + __le32_to_cpu(migr_rec->dest_1st_member_lba)); + printf(" Total Number of Units : %u\n", + __le32_to_cpu(migr_rec->num_migr_units)); + printf(" Size of volume : %u\n", + __le32_to_cpu(migr_rec->post_migr_vol_cap)); + printf(" Expansion space for LBA64 : %u\n", + __le32_to_cpu(migr_rec->post_migr_vol_cap_hi)); + printf(" Record was read from : %u\n", + __le32_to_cpu(migr_rec->ckpt_read_disk_num)); + + break; + } +} +#endif /* MDASSEMBLE */ +/******************************************************************************* + * function: imsm_check_attributes + * Description: Function checks if features represented by attributes flags + * are supported by mdadm. + * Parameters: + * attributes - Attributes read from metadata + * Returns: + * 0 - passed attributes contains unsupported features flags + * 1 - all features are supported + ******************************************************************************/ +static int imsm_check_attributes(__u32 attributes) +{ + int ret_val = 1; + __u32 not_supported = MPB_ATTRIB_SUPPORTED^0xffffffff; + + not_supported &= ~MPB_ATTRIB_IGNORED; + + not_supported &= attributes; + if (not_supported) { + pr_err("(IMSM): Unsupported attributes : %x\n", + (unsigned)__le32_to_cpu(not_supported)); + if (not_supported & MPB_ATTRIB_CHECKSUM_VERIFY) { + dprintf("\t\tMPB_ATTRIB_CHECKSUM_VERIFY \n"); + not_supported ^= MPB_ATTRIB_CHECKSUM_VERIFY; + } + if (not_supported & MPB_ATTRIB_2TB) { + dprintf("\t\tMPB_ATTRIB_2TB\n"); + not_supported ^= MPB_ATTRIB_2TB; + } + if (not_supported & MPB_ATTRIB_RAID0) { + dprintf("\t\tMPB_ATTRIB_RAID0\n"); + not_supported ^= MPB_ATTRIB_RAID0; + } + if (not_supported & MPB_ATTRIB_RAID1) { + dprintf("\t\tMPB_ATTRIB_RAID1\n"); + not_supported ^= MPB_ATTRIB_RAID1; + } + if (not_supported & MPB_ATTRIB_RAID10) { + dprintf("\t\tMPB_ATTRIB_RAID10\n"); + not_supported ^= MPB_ATTRIB_RAID10; + } + if (not_supported & MPB_ATTRIB_RAID1E) { + dprintf("\t\tMPB_ATTRIB_RAID1E\n"); + not_supported ^= MPB_ATTRIB_RAID1E; + } + if (not_supported & MPB_ATTRIB_RAID5) { + dprintf("\t\tMPB_ATTRIB_RAID5\n"); + not_supported ^= MPB_ATTRIB_RAID5; + } + if (not_supported & MPB_ATTRIB_RAIDCNG) { + dprintf("\t\tMPB_ATTRIB_RAIDCNG\n"); + not_supported ^= MPB_ATTRIB_RAIDCNG; + } + if (not_supported & MPB_ATTRIB_BBM) { + dprintf("\t\tMPB_ATTRIB_BBM\n"); + not_supported ^= MPB_ATTRIB_BBM; + } + if (not_supported & MPB_ATTRIB_CHECKSUM_VERIFY) { + dprintf("\t\tMPB_ATTRIB_CHECKSUM_VERIFY (== MPB_ATTRIB_LEGACY)\n"); + not_supported ^= MPB_ATTRIB_CHECKSUM_VERIFY; + } + if (not_supported & MPB_ATTRIB_EXP_STRIPE_SIZE) { + dprintf("\t\tMPB_ATTRIB_EXP_STRIP_SIZE\n"); + not_supported ^= MPB_ATTRIB_EXP_STRIPE_SIZE; + } + if (not_supported & MPB_ATTRIB_2TB_DISK) { + dprintf("\t\tMPB_ATTRIB_2TB_DISK\n"); + not_supported ^= MPB_ATTRIB_2TB_DISK; + } + if (not_supported & MPB_ATTRIB_NEVER_USE2) { + dprintf("\t\tMPB_ATTRIB_NEVER_USE2\n"); + not_supported ^= MPB_ATTRIB_NEVER_USE2; + } + if (not_supported & MPB_ATTRIB_NEVER_USE) { + dprintf("\t\tMPB_ATTRIB_NEVER_USE\n"); + not_supported ^= MPB_ATTRIB_NEVER_USE; + } + + if (not_supported) + dprintf(Name "(IMSM): Unknown attributes : %x\n", not_supported); + + ret_val = 0; + } + + return ret_val; +} + +#ifndef MDASSEMBLE +static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info, char *map); + +static void examine_super_imsm(struct supertype *st, char *homehost) +{ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + char str[MAX_SIGNATURE_LENGTH]; + int i; + struct mdinfo info; + char nbuf[64]; + __u32 sum; + __u32 reserved = imsm_reserved_sectors(super, super->disks); + struct dl *dl; + + snprintf(str, MPB_SIG_LEN, "%s", mpb->sig); + printf(" Magic : %s\n", str); + snprintf(str, strlen(MPB_VERSION_RAID0), "%s", get_imsm_version(mpb)); + printf(" Version : %s\n", get_imsm_version(mpb)); + printf(" Orig Family : %08x\n", __le32_to_cpu(mpb->orig_family_num)); + printf(" Family : %08x\n", __le32_to_cpu(mpb->family_num)); + printf(" Generation : %08x\n", __le32_to_cpu(mpb->generation_num)); + printf(" Attributes : "); + if (imsm_check_attributes(mpb->attributes)) + printf("All supported\n"); + else + printf("not supported\n"); + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf, ':'); + printf(" UUID : %s\n", nbuf + 5); + sum = __le32_to_cpu(mpb->check_sum); + printf(" Checksum : %08x %s\n", sum, + __gen_imsm_checksum(mpb) == sum ? "correct" : "incorrect"); + printf(" MPB Sectors : %d\n", mpb_sectors(mpb)); + printf(" Disks : %d\n", mpb->num_disks); + printf(" RAID Devices : %d\n", mpb->num_raid_devs); + print_imsm_disk(__get_imsm_disk(mpb, super->disks->index), super->disks->index, reserved); + if (super->bbm_log) { + struct bbm_log *log = super->bbm_log; + + printf("\n"); + printf("Bad Block Management Log:\n"); + printf(" Log Size : %d\n", __le32_to_cpu(mpb->bbm_log_size)); + printf(" Signature : %x\n", __le32_to_cpu(log->signature)); + printf(" Entry Count : %d\n", __le32_to_cpu(log->entry_count)); + printf(" Spare Blocks : %d\n", __le32_to_cpu(log->reserved_spare_block_count)); + printf(" First Spare : %llx\n", + (unsigned long long) __le64_to_cpu(log->first_spare_lba)); + } + for (i = 0; i < mpb->num_raid_devs; i++) { + struct mdinfo info; + struct imsm_dev *dev = __get_imsm_dev(mpb, i); + + super->current_vol = i; + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf, ':'); + print_imsm_dev(super, dev, nbuf + 5, super->disks->index); + } + for (i = 0; i < mpb->num_disks; i++) { + if (i == super->disks->index) + continue; + print_imsm_disk(__get_imsm_disk(mpb, i), i, reserved); + } + + for (dl = super->disks; dl; dl = dl->next) + if (dl->index == -1) + print_imsm_disk(&dl->disk, -1, reserved); + + examine_migr_rec_imsm(super); +} + +static void brief_examine_super_imsm(struct supertype *st, int verbose) +{ + /* We just write a generic IMSM ARRAY entry */ + struct mdinfo info; + char nbuf[64]; + struct intel_super *super = st->sb; + + if (!super->anchor->num_raid_devs) { + printf("ARRAY metadata=imsm\n"); + return; + } + + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf, ':'); + printf("ARRAY metadata=imsm UUID=%s\n", nbuf + 5); +} + +static void brief_examine_subarrays_imsm(struct supertype *st, int verbose) +{ + /* We just write a generic IMSM ARRAY entry */ + struct mdinfo info; + char nbuf[64]; + char nbuf1[64]; + struct intel_super *super = st->sb; + int i; + + if (!super->anchor->num_raid_devs) + return; + + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf, ':'); + for (i = 0; i < super->anchor->num_raid_devs; i++) { + struct imsm_dev *dev = get_imsm_dev(super, i); + + super->current_vol = i; + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf1, ':'); + printf("ARRAY /dev/md/%.16s container=%s member=%d UUID=%s\n", + dev->volume, nbuf + 5, i, nbuf1 + 5); + } +} + +static void export_examine_super_imsm(struct supertype *st) +{ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + struct mdinfo info; + char nbuf[64]; + + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf, ':'); + printf("MD_METADATA=imsm\n"); + printf("MD_LEVEL=container\n"); + printf("MD_UUID=%s\n", nbuf+5); + printf("MD_DEVICES=%u\n", mpb->num_disks); +} + +static int copy_metadata_imsm(struct supertype *st, int from, int to) +{ + /* The second last 512byte sector of the device contains + * the "struct imsm_super" metadata. + * This contains mpb_size which is the size in bytes of the + * extended metadata. This is located immediately before + * the imsm_super. + * We want to read all that, plus the last sector which + * may contain a migration record, and write it all + * to the target. + */ + void *buf; + unsigned long long dsize, offset; + int sectors; + struct imsm_super *sb; + int written = 0; + + if (posix_memalign(&buf, 4096, 4096) != 0) + return 1; + + if (!get_dev_size(from, NULL, &dsize)) + goto err; + + if (lseek64(from, dsize-1024, 0) < 0) + goto err; + if (read(from, buf, 512) != 512) + goto err; + sb = buf; + if (strncmp((char*)sb->sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) + goto err; + + sectors = mpb_sectors(sb) + 2; + offset = dsize - sectors * 512; + if (lseek64(from, offset, 0) < 0 || + lseek64(to, offset, 0) < 0) + goto err; + while (written < sectors * 512) { + int n = sectors*512 - written; + if (n > 4096) + n = 4096; + if (read(from, buf, n) != n) + goto err; + if (write(to, buf, n) != n) + goto err; + written += n; + } + free(buf); + return 0; +err: + free(buf); + return 1; +} + +static void detail_super_imsm(struct supertype *st, char *homehost) +{ + struct mdinfo info; + char nbuf[64]; + + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf, ':'); + printf("\n UUID : %s\n", nbuf + 5); +} + +static void brief_detail_super_imsm(struct supertype *st) +{ + struct mdinfo info; + char nbuf[64]; + getinfo_super_imsm(st, &info, NULL); + fname_from_uuid(st, &info, nbuf, ':'); + printf(" UUID=%s", nbuf + 5); +} + +static int imsm_read_serial(int fd, char *devname, __u8 *serial); +static void fd2devname(int fd, char *name); + +static int ahci_enumerate_ports(const char *hba_path, int port_count, int host_base, int verbose) +{ + /* dump an unsorted list of devices attached to AHCI Intel storage + * controller, as well as non-connected ports + */ + int hba_len = strlen(hba_path) + 1; + struct dirent *ent; + DIR *dir; + char *path = NULL; + int err = 0; + unsigned long port_mask = (1 << port_count) - 1; + + if (port_count > (int)sizeof(port_mask) * 8) { + if (verbose > 0) + pr_err("port_count %d out of range\n", port_count); + return 2; + } + + /* scroll through /sys/dev/block looking for devices attached to + * this hba + */ + dir = opendir("/sys/dev/block"); + for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) { + int fd; + char model[64]; + char vendor[64]; + char buf[1024]; + int major, minor; + char *device; + char *c; + int port; + int type; + + if (sscanf(ent->d_name, "%d:%d", &major, &minor) != 2) + continue; + path = devt_to_devpath(makedev(major, minor)); + if (!path) + continue; + if (!path_attached_to_hba(path, hba_path)) { + free(path); + path = NULL; + continue; + } + + /* retrieve the scsi device type */ + if (asprintf(&device, "/sys/dev/block/%d:%d/device/xxxxxxx", major, minor) < 0) { + if (verbose > 0) + pr_err("failed to allocate 'device'\n"); + err = 2; + break; + } + sprintf(device, "/sys/dev/block/%d:%d/device/type", major, minor); + if (load_sys(device, buf) != 0) { + if (verbose > 0) + pr_err("failed to read device type for %s\n", + path); + err = 2; + free(device); + break; + } + type = strtoul(buf, NULL, 10); + + /* if it's not a disk print the vendor and model */ + if (!(type == 0 || type == 7 || type == 14)) { + vendor[0] = '\0'; + model[0] = '\0'; + sprintf(device, "/sys/dev/block/%d:%d/device/vendor", major, minor); + if (load_sys(device, buf) == 0) { + strncpy(vendor, buf, sizeof(vendor)); + vendor[sizeof(vendor) - 1] = '\0'; + c = (char *) &vendor[sizeof(vendor) - 1]; + while (isspace(*c) || *c == '\0') + *c-- = '\0'; + + } + sprintf(device, "/sys/dev/block/%d:%d/device/model", major, minor); + if (load_sys(device, buf) == 0) { + strncpy(model, buf, sizeof(model)); + model[sizeof(model) - 1] = '\0'; + c = (char *) &model[sizeof(model) - 1]; + while (isspace(*c) || *c == '\0') + *c-- = '\0'; + } + + if (vendor[0] && model[0]) + sprintf(buf, "%.64s %.64s", vendor, model); + else + switch (type) { /* numbers from hald/linux/device.c */ + case 1: sprintf(buf, "tape"); break; + case 2: sprintf(buf, "printer"); break; + case 3: sprintf(buf, "processor"); break; + case 4: + case 5: sprintf(buf, "cdrom"); break; + case 6: sprintf(buf, "scanner"); break; + case 8: sprintf(buf, "media_changer"); break; + case 9: sprintf(buf, "comm"); break; + case 12: sprintf(buf, "raid"); break; + default: sprintf(buf, "unknown"); + } + } else + buf[0] = '\0'; + free(device); + + /* chop device path to 'host%d' and calculate the port number */ + c = strchr(&path[hba_len], '/'); + if (!c) { + if (verbose > 0) + pr_err("%s - invalid path name\n", path + hba_len); + err = 2; + break; + } + *c = '\0'; + if (sscanf(&path[hba_len], "host%d", &port) == 1) + port -= host_base; + else { + if (verbose > 0) { + *c = '/'; /* repair the full string */ + pr_err("failed to determine port number for %s\n", + path); + } + err = 2; + break; + } + + /* mark this port as used */ + port_mask &= ~(1 << port); + + /* print out the device information */ + if (buf[0]) { + printf(" Port%d : - non-disk device (%s) -\n", port, buf); + continue; + } + + fd = dev_open(ent->d_name, O_RDONLY); + if (fd < 0) + printf(" Port%d : - disk info unavailable -\n", port); + else { + fd2devname(fd, buf); + printf(" Port%d : %s", port, buf); + if (imsm_read_serial(fd, NULL, (__u8 *) buf) == 0) + printf(" (%.*s)\n", MAX_RAID_SERIAL_LEN, buf); + else + printf(" ()\n"); + close(fd); + } + free(path); + path = NULL; + } + if (path) + free(path); + if (dir) + closedir(dir); + if (err == 0) { + int i; + + for (i = 0; i < port_count; i++) + if (port_mask & (1 << i)) + printf(" Port%d : - no device attached -\n", i); + } + + return err; +} + +static void print_found_intel_controllers(struct sys_dev *elem) +{ + for (; elem; elem = elem->next) { + pr_err("found Intel(R) "); + if (elem->type == SYS_DEV_SATA) + fprintf(stderr, "SATA "); + else if (elem->type == SYS_DEV_SAS) + fprintf(stderr, "SAS "); + fprintf(stderr, "RAID controller"); + if (elem->pci_id) + fprintf(stderr, " at %s", elem->pci_id); + fprintf(stderr, ".\n"); + } + fflush(stderr); +} + +static int ahci_get_port_count(const char *hba_path, int *port_count) +{ + struct dirent *ent; + DIR *dir; + int host_base = -1; + + *port_count = 0; + if ((dir = opendir(hba_path)) == NULL) + return -1; + + for (ent = readdir(dir); ent; ent = readdir(dir)) { + int host; + + if (sscanf(ent->d_name, "host%d", &host) != 1) + continue; + if (*port_count == 0) + host_base = host; + else if (host < host_base) + host_base = host; + + if (host + 1 > *port_count + host_base) + *port_count = host + 1 - host_base; + } + closedir(dir); + return host_base; +} + +static void print_imsm_capability(const struct imsm_orom *orom) +{ + printf(" Platform : Intel(R) Matrix Storage Manager\n"); + printf(" Version : %d.%d.%d.%d\n", orom->major_ver, orom->minor_ver, + orom->hotfix_ver, orom->build); + printf(" RAID Levels :%s%s%s%s%s\n", + imsm_orom_has_raid0(orom) ? " raid0" : "", + imsm_orom_has_raid1(orom) ? " raid1" : "", + imsm_orom_has_raid1e(orom) ? " raid1e" : "", + imsm_orom_has_raid10(orom) ? " raid10" : "", + imsm_orom_has_raid5(orom) ? " raid5" : ""); + printf(" Chunk Sizes :%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + imsm_orom_has_chunk(orom, 2) ? " 2k" : "", + imsm_orom_has_chunk(orom, 4) ? " 4k" : "", + imsm_orom_has_chunk(orom, 8) ? " 8k" : "", + imsm_orom_has_chunk(orom, 16) ? " 16k" : "", + imsm_orom_has_chunk(orom, 32) ? " 32k" : "", + imsm_orom_has_chunk(orom, 64) ? " 64k" : "", + imsm_orom_has_chunk(orom, 128) ? " 128k" : "", + imsm_orom_has_chunk(orom, 256) ? " 256k" : "", + imsm_orom_has_chunk(orom, 512) ? " 512k" : "", + imsm_orom_has_chunk(orom, 1024*1) ? " 1M" : "", + imsm_orom_has_chunk(orom, 1024*2) ? " 2M" : "", + imsm_orom_has_chunk(orom, 1024*4) ? " 4M" : "", + imsm_orom_has_chunk(orom, 1024*8) ? " 8M" : "", + imsm_orom_has_chunk(orom, 1024*16) ? " 16M" : "", + imsm_orom_has_chunk(orom, 1024*32) ? " 32M" : "", + imsm_orom_has_chunk(orom, 1024*64) ? " 64M" : ""); + printf(" 2TB volumes :%s supported\n", + (orom->attr & IMSM_OROM_ATTR_2TB)?"":" not"); + printf(" 2TB disks :%s supported\n", + (orom->attr & IMSM_OROM_ATTR_2TB_DISK)?"":" not"); + printf(" Max Disks : %d\n", orom->tds); + printf(" Max Volumes : %d per array, %d per controller\n", + orom->vpa, orom->vphba); + return; +} + +static void print_imsm_capability_export(const struct imsm_orom *orom) +{ + printf("MD_FIRMWARE_TYPE=imsm\n"); + printf("IMSM_VERSION=%d.%d.%d.%d\n",orom->major_ver, orom->minor_ver, + orom->hotfix_ver, orom->build); + printf("IMSM_SUPPORTED_RAID_LEVELS=%s%s%s%s%s\n", + imsm_orom_has_raid0(orom) ? "raid0 " : "", + imsm_orom_has_raid1(orom) ? "raid1 " : "", + imsm_orom_has_raid1e(orom) ? "raid1e " : "", + imsm_orom_has_raid5(orom) ? "raid10 " : "", + imsm_orom_has_raid10(orom) ? "raid5 " : ""); + printf("IMSM_SUPPORTED_CHUNK_SIZES=%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + imsm_orom_has_chunk(orom, 2) ? "2k " : "", + imsm_orom_has_chunk(orom, 4) ? "4k " : "", + imsm_orom_has_chunk(orom, 8) ? "8k " : "", + imsm_orom_has_chunk(orom, 16) ? "16k " : "", + imsm_orom_has_chunk(orom, 32) ? "32k " : "", + imsm_orom_has_chunk(orom, 64) ? "64k " : "", + imsm_orom_has_chunk(orom, 128) ? "128k " : "", + imsm_orom_has_chunk(orom, 256) ? "256k " : "", + imsm_orom_has_chunk(orom, 512) ? "512k " : "", + imsm_orom_has_chunk(orom, 1024*1) ? "1M " : "", + imsm_orom_has_chunk(orom, 1024*2) ? "2M " : "", + imsm_orom_has_chunk(orom, 1024*4) ? "4M " : "", + imsm_orom_has_chunk(orom, 1024*8) ? "8M " : "", + imsm_orom_has_chunk(orom, 1024*16) ? "16M " : "", + imsm_orom_has_chunk(orom, 1024*32) ? "32M " : "", + imsm_orom_has_chunk(orom, 1024*64) ? "64M " : ""); + printf("IMSM_2TB_VOLUMES=%s\n",(orom->attr & IMSM_OROM_ATTR_2TB) ? "yes" : "no"); + printf("IMSM_2TB_DISKS=%s\n",(orom->attr & IMSM_OROM_ATTR_2TB_DISK) ? "yes" : "no"); + printf("IMSM_MAX_DISKS=%d\n",orom->tds); + printf("IMSM_MAX_VOLUMES_PER_ARRAY=%d\n",orom->vpa); + printf("IMSM_MAX_VOLUMES_PER_CONTROLLER=%d\n",orom->vphba); +} + +static int detail_platform_imsm(int verbose, int enumerate_only, char *controller_path) +{ + /* There are two components to imsm platform support, the ahci SATA + * controller and the option-rom. To find the SATA controller we + * simply look in /sys/bus/pci/drivers/ahci to see if an ahci + * controller with the Intel vendor id is present. This approach + * allows mdadm to leverage the kernel's ahci detection logic, with the + * caveat that if ahci.ko is not loaded mdadm will not be able to + * detect platform raid capabilities. The option-rom resides in a + * platform "Adapter ROM". We scan for its signature to retrieve the + * platform capabilities. If raid support is disabled in the BIOS the + * option-rom capability structure will not be available. + */ + const struct imsm_orom *orom; + struct sys_dev *list, *hba; + int host_base = 0; + int port_count = 0; + int result=1; + + if (enumerate_only) { + if (check_env("IMSM_NO_PLATFORM")) + return 0; + list = find_intel_devices(); + if (!list) + return 2; + for (hba = list; hba; hba = hba->next) { + orom = find_imsm_capability(hba->type); + if (!orom) { + result = 2; + break; + } + else + result = 0; + } + return result; + } + + list = find_intel_devices(); + if (!list) { + if (verbose > 0) + pr_err("no active Intel(R) RAID " + "controller found.\n"); + return 2; + } else if (verbose > 0) + print_found_intel_controllers(list); + + for (hba = list; hba; hba = hba->next) { + if (controller_path && (compare_paths(hba->path,controller_path) != 0)) + continue; + orom = find_imsm_capability(hba->type); + if (!orom) + pr_err("imsm capabilities not found for controller: %s (type %s)\n", + hba->path, get_sys_dev_type(hba->type)); + else { + result = 0; + print_imsm_capability(orom); + printf(" I/O Controller : %s (%s)\n", + hba->path, get_sys_dev_type(hba->type)); + if (hba->type == SYS_DEV_SATA) { + host_base = ahci_get_port_count(hba->path, &port_count); + if (ahci_enumerate_ports(hba->path, port_count, host_base, verbose)) { + if (verbose > 0) + pr_err("failed to enumerate " + "ports on SATA controller at %s.\n", hba->pci_id); + result |= 2; + } + } + } + } + + if (controller_path && result == 1) + pr_err("no active Intel(R) RAID " + "controller found under %s\n",controller_path); + + return result; +} + +static int export_detail_platform_imsm(int verbose, char *controller_path) +{ + const struct imsm_orom *orom; + struct sys_dev *list, *hba; + int result=1; + + list = find_intel_devices(); + if (!list) { + if (verbose > 0) + pr_err("IMSM_DETAIL_PLATFORM_ERROR=NO_INTEL_DEVICES\n"); + result = 2; + return result; + } + + for (hba = list; hba; hba = hba->next) { + if (controller_path && (compare_paths(hba->path,controller_path) != 0)) + continue; + orom = find_imsm_capability(hba->type); + if (!orom) { + if (verbose > 0) + pr_err("IMSM_DETAIL_PLATFORM_ERROR=NO_IMSM_CAPABLE_DEVICE_UNDER_%s\n",hba->path); + } + else { + print_imsm_capability_export(orom); + result = 0; + } + } + + return result; +} + +#endif + +static int match_home_imsm(struct supertype *st, char *homehost) +{ + /* the imsm metadata format does not specify any host + * identification information. We return -1 since we can never + * confirm nor deny whether a given array is "meant" for this + * host. We rely on compare_super and the 'family_num' fields to + * exclude member disks that do not belong, and we rely on + * mdadm.conf to specify the arrays that should be assembled. + * Auto-assembly may still pick up "foreign" arrays. + */ + + return -1; +} + +static void uuid_from_super_imsm(struct supertype *st, int uuid[4]) +{ + /* The uuid returned here is used for: + * uuid to put into bitmap file (Create, Grow) + * uuid for backup header when saving critical section (Grow) + * comparing uuids when re-adding a device into an array + * In these cases the uuid required is that of the data-array, + * not the device-set. + * uuid to recognise same set when adding a missing device back + * to an array. This is a uuid for the device-set. + * + * For each of these we can make do with a truncated + * or hashed uuid rather than the original, as long as + * everyone agrees. + * In each case the uuid required is that of the data-array, + * not the device-set. + */ + /* imsm does not track uuid's so we synthesis one using sha1 on + * - The signature (Which is constant for all imsm array, but no matter) + * - the orig_family_num of the container + * - the index number of the volume + * - the 'serial' number of the volume. + * Hopefully these are all constant. + */ + struct intel_super *super = st->sb; + + char buf[20]; + struct sha1_ctx ctx; + struct imsm_dev *dev = NULL; + __u32 family_num; + + /* some mdadm versions failed to set ->orig_family_num, in which + * case fall back to ->family_num. orig_family_num will be + * fixed up with the first metadata update. + */ + family_num = super->anchor->orig_family_num; + if (family_num == 0) + family_num = super->anchor->family_num; + sha1_init_ctx(&ctx); + sha1_process_bytes(super->anchor->sig, MPB_SIG_LEN, &ctx); + sha1_process_bytes(&family_num, sizeof(__u32), &ctx); + if (super->current_vol >= 0) + dev = get_imsm_dev(super, super->current_vol); + if (dev) { + __u32 vol = super->current_vol; + sha1_process_bytes(&vol, sizeof(vol), &ctx); + sha1_process_bytes(dev->volume, MAX_RAID_SERIAL_LEN, &ctx); + } + sha1_finish_ctx(&ctx, buf); + memcpy(uuid, buf, 4*4); +} + +#if 0 +static void +get_imsm_numerical_version(struct imsm_super *mpb, int *m, int *p) +{ + __u8 *v = get_imsm_version(mpb); + __u8 *end = mpb->sig + MAX_SIGNATURE_LENGTH; + char major[] = { 0, 0, 0 }; + char minor[] = { 0 ,0, 0 }; + char patch[] = { 0, 0, 0 }; + char *ver_parse[] = { major, minor, patch }; + int i, j; + + i = j = 0; + while (*v != '\0' && v < end) { + if (*v != '.' && j < 2) + ver_parse[i][j++] = *v; + else { + i++; + j = 0; + } + v++; + } + + *m = strtol(minor, NULL, 0); + *p = strtol(patch, NULL, 0); +} +#endif + +static __u32 migr_strip_blocks_resync(struct imsm_dev *dev) +{ + /* migr_strip_size when repairing or initializing parity */ + struct imsm_map *map = get_imsm_map(dev, MAP_0); + __u32 chunk = __le32_to_cpu(map->blocks_per_strip); + + switch (get_imsm_raid_level(map)) { + case 5: + case 10: + return chunk; + default: + return 128*1024 >> 9; + } +} + +static __u32 migr_strip_blocks_rebuild(struct imsm_dev *dev) +{ + /* migr_strip_size when rebuilding a degraded disk, no idea why + * this is different than migr_strip_size_resync(), but it's good + * to be compatible + */ + struct imsm_map *map = get_imsm_map(dev, MAP_1); + __u32 chunk = __le32_to_cpu(map->blocks_per_strip); + + switch (get_imsm_raid_level(map)) { + case 1: + case 10: + if (map->num_members % map->num_domains == 0) + return 128*1024 >> 9; + else + return chunk; + case 5: + return max((__u32) 64*1024 >> 9, chunk); + default: + return 128*1024 >> 9; + } +} + +static __u32 num_stripes_per_unit_resync(struct imsm_dev *dev) +{ + struct imsm_map *lo = get_imsm_map(dev, MAP_0); + struct imsm_map *hi = get_imsm_map(dev, MAP_1); + __u32 lo_chunk = __le32_to_cpu(lo->blocks_per_strip); + __u32 hi_chunk = __le32_to_cpu(hi->blocks_per_strip); + + return max((__u32) 1, hi_chunk / lo_chunk); +} + +static __u32 num_stripes_per_unit_rebuild(struct imsm_dev *dev) +{ + struct imsm_map *lo = get_imsm_map(dev, MAP_0); + int level = get_imsm_raid_level(lo); + + if (level == 1 || level == 10) { + struct imsm_map *hi = get_imsm_map(dev, MAP_1); + + return hi->num_domains; + } else + return num_stripes_per_unit_resync(dev); +} + +static __u8 imsm_num_data_members(struct imsm_dev *dev, int second_map) +{ + /* named 'imsm_' because raid0, raid1 and raid10 + * counter-intuitively have the same number of data disks + */ + struct imsm_map *map = get_imsm_map(dev, second_map); + + switch (get_imsm_raid_level(map)) { + case 0: + return map->num_members; + break; + case 1: + case 10: + return map->num_members/2; + case 5: + return map->num_members - 1; + default: + dprintf("%s: unsupported raid level\n", __func__); + return 0; + } +} + +static __u32 parity_segment_depth(struct imsm_dev *dev) +{ + struct imsm_map *map = get_imsm_map(dev, MAP_0); + __u32 chunk = __le32_to_cpu(map->blocks_per_strip); + + switch(get_imsm_raid_level(map)) { + case 1: + case 10: + return chunk * map->num_domains; + case 5: + return chunk * map->num_members; + default: + return chunk; + } +} + +static __u32 map_migr_block(struct imsm_dev *dev, __u32 block) +{ + struct imsm_map *map = get_imsm_map(dev, MAP_1); + __u32 chunk = __le32_to_cpu(map->blocks_per_strip); + __u32 strip = block / chunk; + + switch (get_imsm_raid_level(map)) { + case 1: + case 10: { + __u32 vol_strip = (strip * map->num_domains) + 1; + __u32 vol_stripe = vol_strip / map->num_members; + + return vol_stripe * chunk + block % chunk; + } case 5: { + __u32 stripe = strip / (map->num_members - 1); + + return stripe * chunk + block % chunk; + } + default: + return 0; + } +} + +static __u64 blocks_per_migr_unit(struct intel_super *super, + struct imsm_dev *dev) +{ + /* calculate the conversion factor between per member 'blocks' + * (md/{resync,rebuild}_start) and imsm migration units, return + * 0 for the 'not migrating' and 'unsupported migration' cases + */ + if (!dev->vol.migr_state) + return 0; + + switch (migr_type(dev)) { + case MIGR_GEN_MIGR: { + struct migr_record *migr_rec = super->migr_rec; + return __le32_to_cpu(migr_rec->blocks_per_unit); + } + case MIGR_VERIFY: + case MIGR_REPAIR: + case MIGR_INIT: { + struct imsm_map *map = get_imsm_map(dev, MAP_0); + __u32 stripes_per_unit; + __u32 blocks_per_unit; + __u32 parity_depth; + __u32 migr_chunk; + __u32 block_map; + __u32 block_rel; + __u32 segment; + __u32 stripe; + __u8 disks; + + /* yes, this is really the translation of migr_units to + * per-member blocks in the 'resync' case + */ + stripes_per_unit = num_stripes_per_unit_resync(dev); + migr_chunk = migr_strip_blocks_resync(dev); + disks = imsm_num_data_members(dev, MAP_0); + blocks_per_unit = stripes_per_unit * migr_chunk * disks; + stripe = __le16_to_cpu(map->blocks_per_strip) * disks; + segment = blocks_per_unit / stripe; + block_rel = blocks_per_unit - segment * stripe; + parity_depth = parity_segment_depth(dev); + block_map = map_migr_block(dev, block_rel); + return block_map + parity_depth * segment; + } + case MIGR_REBUILD: { + __u32 stripes_per_unit; + __u32 migr_chunk; + + stripes_per_unit = num_stripes_per_unit_rebuild(dev); + migr_chunk = migr_strip_blocks_rebuild(dev); + return migr_chunk * stripes_per_unit; + } + case MIGR_STATE_CHANGE: + default: + return 0; + } +} + +static int imsm_level_to_layout(int level) +{ + switch (level) { + case 0: + case 1: + return 0; + case 5: + case 6: + return ALGORITHM_LEFT_ASYMMETRIC; + case 10: + return 0x102; + } + return UnSet; +} + +/******************************************************************************* + * Function: read_imsm_migr_rec + * Description: Function reads imsm migration record from last sector of disk + * Parameters: + * fd : disk descriptor + * super : metadata info + * Returns: + * 0 : success, + * -1 : fail + ******************************************************************************/ +static int read_imsm_migr_rec(int fd, struct intel_super *super) +{ + int ret_val = -1; + unsigned long long dsize; + + get_dev_size(fd, NULL, &dsize); + if (lseek64(fd, dsize - MIGR_REC_POSITION, SEEK_SET) < 0) { + pr_err("Cannot seek to anchor block: %s\n", + strerror(errno)); + goto out; + } + if (read(fd, super->migr_rec_buf, MIGR_REC_BUF_SIZE) != + MIGR_REC_BUF_SIZE) { + pr_err("Cannot read migr record block: %s\n", + strerror(errno)); + goto out; + } + ret_val = 0; + +out: + return ret_val; +} + +static struct imsm_dev *imsm_get_device_during_migration( + struct intel_super *super) +{ + + struct intel_dev *dv; + + for (dv = super->devlist; dv; dv = dv->next) { + if (is_gen_migration(dv->dev)) + return dv->dev; + } + return NULL; +} + +/******************************************************************************* + * Function: load_imsm_migr_rec + * Description: Function reads imsm migration record (it is stored at the last + * sector of disk) + * Parameters: + * super : imsm internal array info + * info : general array info + * Returns: + * 0 : success + * -1 : fail + * -2 : no migration in progress + ******************************************************************************/ +static int load_imsm_migr_rec(struct intel_super *super, struct mdinfo *info) +{ + struct mdinfo *sd; + struct dl *dl = NULL; + char nm[30]; + int retval = -1; + int fd = -1; + struct imsm_dev *dev; + struct imsm_map *map = NULL; + int slot = -1; + + /* find map under migration */ + dev = imsm_get_device_during_migration(super); + /* nothing to load,no migration in progress? + */ + if (dev == NULL) + return -2; + map = get_imsm_map(dev, MAP_0); + + if (info) { + for (sd = info->devs ; sd ; sd = sd->next) { + /* skip spare and failed disks + */ + if (sd->disk.raid_disk < 0) + continue; + /* read only from one of the first two slots */ + if (map) + slot = get_imsm_disk_slot(map, + sd->disk.raid_disk); + if ((map == NULL) || (slot > 1) || (slot < 0)) + continue; + + sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor); + fd = dev_open(nm, O_RDONLY); + if (fd >= 0) + break; + } + } + if (fd < 0) { + for (dl = super->disks; dl; dl = dl->next) { + /* skip spare and failed disks + */ + if (dl->index < 0) + continue; + /* read only from one of the first two slots */ + if (map) + slot = get_imsm_disk_slot(map, dl->index); + if ((map == NULL) || (slot > 1) || (slot < 0)) + continue; + sprintf(nm, "%d:%d", dl->major, dl->minor); + fd = dev_open(nm, O_RDONLY); + if (fd >= 0) + break; + } + } + if (fd < 0) + goto out; + retval = read_imsm_migr_rec(fd, super); + +out: + if (fd >= 0) + close(fd); + return retval; +} + +#ifndef MDASSEMBLE +/******************************************************************************* + * function: imsm_create_metadata_checkpoint_update + * Description: It creates update for checkpoint change. + * Parameters: + * super : imsm internal array info + * u : pointer to prepared update + * Returns: + * Uptate length. + * If length is equal to 0, input pointer u contains no update + ******************************************************************************/ +static int imsm_create_metadata_checkpoint_update( + struct intel_super *super, + struct imsm_update_general_migration_checkpoint **u) +{ + + int update_memory_size = 0; + + dprintf("imsm_create_metadata_checkpoint_update(enter)\n"); + + if (u == NULL) + return 0; + *u = NULL; + + /* size of all update data without anchor */ + update_memory_size = + sizeof(struct imsm_update_general_migration_checkpoint); + + *u = xcalloc(1, update_memory_size); + if (*u == NULL) { + dprintf("error: cannot get memory for " + "imsm_create_metadata_checkpoint_update update\n"); + return 0; + } + (*u)->type = update_general_migration_checkpoint; + (*u)->curr_migr_unit = __le32_to_cpu(super->migr_rec->curr_migr_unit); + dprintf("imsm_create_metadata_checkpoint_update: prepared for %u\n", + (*u)->curr_migr_unit); + + return update_memory_size; +} + +static void imsm_update_metadata_locally(struct supertype *st, + void *buf, int len); + +/******************************************************************************* + * Function: write_imsm_migr_rec + * Description: Function writes imsm migration record + * (at the last sector of disk) + * Parameters: + * super : imsm internal array info + * Returns: + * 0 : success + * -1 : if fail + ******************************************************************************/ +static int write_imsm_migr_rec(struct supertype *st) +{ + struct intel_super *super = st->sb; + unsigned long long dsize; + char nm[30]; + int fd = -1; + int retval = -1; + struct dl *sd; + int len; + struct imsm_update_general_migration_checkpoint *u; + struct imsm_dev *dev; + struct imsm_map *map = NULL; + + /* find map under migration */ + dev = imsm_get_device_during_migration(super); + /* if no migration, write buffer anyway to clear migr_record + * on disk based on first available device + */ + if (dev == NULL) + dev = get_imsm_dev(super, super->current_vol < 0 ? 0 : + super->current_vol); + + map = get_imsm_map(dev, MAP_0); + + for (sd = super->disks ; sd ; sd = sd->next) { + int slot = -1; + + /* skip failed and spare devices */ + if (sd->index < 0) + continue; + /* write to 2 first slots only */ + if (map) + slot = get_imsm_disk_slot(map, sd->index); + if ((map == NULL) || (slot > 1) || (slot < 0)) + continue; + + sprintf(nm, "%d:%d", sd->major, sd->minor); + fd = dev_open(nm, O_RDWR); + if (fd < 0) + continue; + get_dev_size(fd, NULL, &dsize); + if (lseek64(fd, dsize - MIGR_REC_POSITION, SEEK_SET) < 0) { + pr_err("Cannot seek to anchor block: %s\n", + strerror(errno)); + goto out; + } + if (write(fd, super->migr_rec_buf, MIGR_REC_BUF_SIZE) != + MIGR_REC_BUF_SIZE) { + pr_err("Cannot write migr record block: %s\n", + strerror(errno)); + goto out; + } + close(fd); + fd = -1; + } + /* update checkpoint information in metadata */ + len = imsm_create_metadata_checkpoint_update(super, &u); + + if (len <= 0) { + dprintf("imsm: Cannot prepare update\n"); + goto out; + } + /* update metadata locally */ + imsm_update_metadata_locally(st, u, len); + /* and possibly remotely */ + if (st->update_tail) { + append_metadata_update(st, u, len); + /* during reshape we do all work inside metadata handler + * manage_reshape(), so metadata update has to be triggered + * insida it + */ + flush_metadata_updates(st); + st->update_tail = &st->updates; + } else + free(u); + + retval = 0; + out: + if (fd >= 0) + close(fd); + return retval; +} +#endif /* MDASSEMBLE */ + +/* spare/missing disks activations are not allowe when + * array/container performs reshape operation, because + * all arrays in container works on the same disks set + */ +int imsm_reshape_blocks_arrays_changes(struct intel_super *super) +{ + int rv = 0; + struct intel_dev *i_dev; + struct imsm_dev *dev; + + /* check whole container + */ + for (i_dev = super->devlist; i_dev; i_dev = i_dev->next) { + dev = i_dev->dev; + if (is_gen_migration(dev)) { + /* No repair during any migration in container + */ + rv = 1; + break; + } + } + return rv; +} +static unsigned long long imsm_component_size_aligment_check(int level, + int chunk_size, + unsigned long long component_size) +{ + unsigned int component_size_alligment; + + /* check component size aligment + */ + component_size_alligment = component_size % (chunk_size/512); + + dprintf("imsm_component_size_aligment_check(Level: %i, " + "chunk_size = %i, component_size = %llu), " + "component_size_alligment = %u\n", + level, chunk_size, component_size, + component_size_alligment); + + if (component_size_alligment && (level != 1) && (level != UnSet)) { + dprintf("imsm: reported component size alligned from %llu ", + component_size); + component_size -= component_size_alligment; + dprintf("to %llu (%i).\n", + component_size, component_size_alligment); + } + + return component_size; +} + +static void getinfo_super_imsm_volume(struct supertype *st, struct mdinfo *info, char *dmap) +{ + struct intel_super *super = st->sb; + struct migr_record *migr_rec = super->migr_rec; + struct imsm_dev *dev = get_imsm_dev(super, super->current_vol); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_map *prev_map = get_imsm_map(dev, MAP_1); + struct imsm_map *map_to_analyse = map; + struct dl *dl; + int map_disks = info->array.raid_disks; + + memset(info, 0, sizeof(*info)); + if (prev_map) + map_to_analyse = prev_map; + + dl = super->current_disk; + + info->container_member = super->current_vol; + info->array.raid_disks = map->num_members; + info->array.level = get_imsm_raid_level(map_to_analyse); + info->array.layout = imsm_level_to_layout(info->array.level); + info->array.md_minor = -1; + info->array.ctime = 0; + info->array.utime = 0; + info->array.chunk_size = + __le16_to_cpu(map_to_analyse->blocks_per_strip) << 9; + info->array.state = !dev->vol.dirty; + info->custom_array_size = __le32_to_cpu(dev->size_high); + info->custom_array_size <<= 32; + info->custom_array_size |= __le32_to_cpu(dev->size_low); + info->recovery_blocked = imsm_reshape_blocks_arrays_changes(st->sb); + + if (is_gen_migration(dev)) { + info->reshape_active = 1; + info->new_level = get_imsm_raid_level(map); + info->new_layout = imsm_level_to_layout(info->new_level); + info->new_chunk = __le16_to_cpu(map->blocks_per_strip) << 9; + info->delta_disks = map->num_members - prev_map->num_members; + if (info->delta_disks) { + /* this needs to be applied to every array + * in the container. + */ + info->reshape_active = CONTAINER_RESHAPE; + } + /* We shape information that we give to md might have to be + * modify to cope with md's requirement for reshaping arrays. + * For example, when reshaping a RAID0, md requires it to be + * presented as a degraded RAID4. + * Also if a RAID0 is migrating to a RAID5 we need to specify + * the array as already being RAID5, but the 'before' layout + * is a RAID4-like layout. + */ + switch (info->array.level) { + case 0: + switch(info->new_level) { + case 0: + /* conversion is happening as RAID4 */ + info->array.level = 4; + info->array.raid_disks += 1; + break; + case 5: + /* conversion is happening as RAID5 */ + info->array.level = 5; + info->array.layout = ALGORITHM_PARITY_N; + info->delta_disks -= 1; + break; + default: + /* FIXME error message */ + info->array.level = UnSet; + break; + } + break; + } + } else { + info->new_level = UnSet; + info->new_layout = UnSet; + info->new_chunk = info->array.chunk_size; + info->delta_disks = 0; + } + + if (dl) { + info->disk.major = dl->major; + info->disk.minor = dl->minor; + info->disk.number = dl->index; + info->disk.raid_disk = get_imsm_disk_slot(map_to_analyse, + dl->index); + } + + info->data_offset = pba_of_lba0(map_to_analyse); + info->component_size = blocks_per_member(map_to_analyse); + + info->component_size = imsm_component_size_aligment_check( + info->array.level, + info->array.chunk_size, + info->component_size); + + memset(info->uuid, 0, sizeof(info->uuid)); + info->recovery_start = MaxSector; + + info->reshape_progress = 0; + info->resync_start = MaxSector; + if ((map_to_analyse->map_state == IMSM_T_STATE_UNINITIALIZED || + dev->vol.dirty) && + imsm_reshape_blocks_arrays_changes(super) == 0) { + info->resync_start = 0; + } + if (dev->vol.migr_state) { + switch (migr_type(dev)) { + case MIGR_REPAIR: + case MIGR_INIT: { + __u64 blocks_per_unit = blocks_per_migr_unit(super, + dev); + __u64 units = __le32_to_cpu(dev->vol.curr_migr_unit); + + info->resync_start = blocks_per_unit * units; + break; + } + case MIGR_GEN_MIGR: { + __u64 blocks_per_unit = blocks_per_migr_unit(super, + dev); + __u64 units = __le32_to_cpu(migr_rec->curr_migr_unit); + unsigned long long array_blocks; + int used_disks; + + if (__le32_to_cpu(migr_rec->ascending_migr) && + (units < + (__le32_to_cpu(migr_rec->num_migr_units)-1)) && + (super->migr_rec->rec_status == + __cpu_to_le32(UNIT_SRC_IN_CP_AREA))) + units++; + + info->reshape_progress = blocks_per_unit * units; + + dprintf("IMSM: General Migration checkpoint : %llu " + "(%llu) -> read reshape progress : %llu\n", + (unsigned long long)units, + (unsigned long long)blocks_per_unit, + info->reshape_progress); + + used_disks = imsm_num_data_members(dev, MAP_1); + if (used_disks > 0) { + array_blocks = blocks_per_member(map) * + used_disks; + /* round array size down to closest MB + */ + info->custom_array_size = (array_blocks + >> SECT_PER_MB_SHIFT) + << SECT_PER_MB_SHIFT; + } + } + case MIGR_VERIFY: + /* we could emulate the checkpointing of + * 'sync_action=check' migrations, but for now + * we just immediately complete them + */ + case MIGR_REBUILD: + /* this is handled by container_content_imsm() */ + case MIGR_STATE_CHANGE: + /* FIXME handle other migrations */ + default: + /* we are not dirty, so... */ + info->resync_start = MaxSector; + } + } + + strncpy(info->name, (char *) dev->volume, MAX_RAID_SERIAL_LEN); + info->name[MAX_RAID_SERIAL_LEN] = 0; + + info->array.major_version = -1; + info->array.minor_version = -2; + sprintf(info->text_version, "/%s/%d", st->container_devnm, info->container_member); + info->safe_mode_delay = 4000; /* 4 secs like the Matrix driver */ + uuid_from_super_imsm(st, info->uuid); + + if (dmap) { + int i, j; + for (i=0; i<map_disks; i++) { + dmap[i] = 0; + if (i < info->array.raid_disks) { + struct imsm_disk *dsk; + j = get_imsm_disk_idx(dev, i, MAP_X); + dsk = get_imsm_disk(super, j); + if (dsk && (dsk->status & CONFIGURED_DISK)) + dmap[i] = 1; + } + } + } +} + +static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, + int failed, int look_in_map); + +static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev, + int look_in_map); + +#ifndef MDASSEMBLE +static void manage_second_map(struct intel_super *super, struct imsm_dev *dev) +{ + if (is_gen_migration(dev)) { + int failed; + __u8 map_state; + struct imsm_map *map2 = get_imsm_map(dev, MAP_1); + + failed = imsm_count_failed(super, dev, MAP_1); + map_state = imsm_check_degraded(super, dev, failed, MAP_1); + if (map2->map_state != map_state) { + map2->map_state = map_state; + super->updates_pending++; + } + } +} +#endif + +static struct imsm_disk *get_imsm_missing(struct intel_super *super, __u8 index) +{ + struct dl *d; + + for (d = super->missing; d; d = d->next) + if (d->index == index) + return &d->disk; + return NULL; +} + +static void getinfo_super_imsm(struct supertype *st, struct mdinfo *info, char *map) +{ + struct intel_super *super = st->sb; + struct imsm_disk *disk; + int map_disks = info->array.raid_disks; + int max_enough = -1; + int i; + struct imsm_super *mpb; + + if (super->current_vol >= 0) { + getinfo_super_imsm_volume(st, info, map); + return; + } + memset(info, 0, sizeof(*info)); + + /* Set raid_disks to zero so that Assemble will always pull in valid + * spares + */ + info->array.raid_disks = 0; + info->array.level = LEVEL_CONTAINER; + info->array.layout = 0; + info->array.md_minor = -1; + info->array.ctime = 0; /* N/A for imsm */ + info->array.utime = 0; + info->array.chunk_size = 0; + + info->disk.major = 0; + info->disk.minor = 0; + info->disk.raid_disk = -1; + info->reshape_active = 0; + info->array.major_version = -1; + info->array.minor_version = -2; + strcpy(info->text_version, "imsm"); + info->safe_mode_delay = 0; + info->disk.number = -1; + info->disk.state = 0; + info->name[0] = 0; + info->recovery_start = MaxSector; + info->recovery_blocked = imsm_reshape_blocks_arrays_changes(st->sb); + + /* do we have the all the insync disks that we expect? */ + mpb = super->anchor; + + for (i = 0; i < mpb->num_raid_devs; i++) { + struct imsm_dev *dev = get_imsm_dev(super, i); + int failed, enough, j, missing = 0; + struct imsm_map *map; + __u8 state; + + failed = imsm_count_failed(super, dev, MAP_0); + state = imsm_check_degraded(super, dev, failed, MAP_0); + map = get_imsm_map(dev, MAP_0); + + /* any newly missing disks? + * (catches single-degraded vs double-degraded) + */ + for (j = 0; j < map->num_members; j++) { + __u32 ord = get_imsm_ord_tbl_ent(dev, j, MAP_0); + __u32 idx = ord_to_idx(ord); + + if (!(ord & IMSM_ORD_REBUILD) && + get_imsm_missing(super, idx)) { + missing = 1; + break; + } + } + + if (state == IMSM_T_STATE_FAILED) + enough = -1; + else if (state == IMSM_T_STATE_DEGRADED && + (state != map->map_state || missing)) + enough = 0; + else /* we're normal, or already degraded */ + enough = 1; + if (is_gen_migration(dev) && missing) { + /* during general migration we need all disks + * that process is running on. + * No new missing disk is allowed. + */ + max_enough = -1; + enough = -1; + /* no more checks necessary + */ + break; + } + /* in the missing/failed disk case check to see + * if at least one array is runnable + */ + max_enough = max(max_enough, enough); + } + dprintf("%s: enough: %d\n", __func__, max_enough); + info->container_enough = max_enough; + + if (super->disks) { + __u32 reserved = imsm_reserved_sectors(super, super->disks); + + disk = &super->disks->disk; + info->data_offset = total_blocks(&super->disks->disk) - reserved; + info->component_size = reserved; + info->disk.state = is_configured(disk) ? (1 << MD_DISK_ACTIVE) : 0; + /* we don't change info->disk.raid_disk here because + * this state will be finalized in mdmon after we have + * found the 'most fresh' version of the metadata + */ + info->disk.state |= is_failed(disk) ? (1 << MD_DISK_FAULTY) : 0; + info->disk.state |= is_spare(disk) ? 0 : (1 << MD_DISK_SYNC); + } + + /* only call uuid_from_super_imsm when this disk is part of a populated container, + * ->compare_super may have updated the 'num_raid_devs' field for spares + */ + if (info->disk.state & (1 << MD_DISK_SYNC) || super->anchor->num_raid_devs) + uuid_from_super_imsm(st, info->uuid); + else + memcpy(info->uuid, uuid_zero, sizeof(uuid_zero)); + + /* I don't know how to compute 'map' on imsm, so use safe default */ + if (map) { + int i; + for (i = 0; i < map_disks; i++) + map[i] = 1; + } + +} + +/* allocates memory and fills disk in mdinfo structure + * for each disk in array */ +struct mdinfo *getinfo_super_disks_imsm(struct supertype *st) +{ + struct mdinfo *mddev = NULL; + struct intel_super *super = st->sb; + struct imsm_disk *disk; + int count = 0; + struct dl *dl; + if (!super || !super->disks) + return NULL; + dl = super->disks; + mddev = xcalloc(1, sizeof(*mddev)); + while (dl) { + struct mdinfo *tmp; + disk = &dl->disk; + tmp = xcalloc(1, sizeof(*tmp)); + if (mddev->devs) + tmp->next = mddev->devs; + mddev->devs = tmp; + tmp->disk.number = count++; + tmp->disk.major = dl->major; + tmp->disk.minor = dl->minor; + tmp->disk.state = is_configured(disk) ? + (1 << MD_DISK_ACTIVE) : 0; + tmp->disk.state |= is_failed(disk) ? (1 << MD_DISK_FAULTY) : 0; + tmp->disk.state |= is_spare(disk) ? 0 : (1 << MD_DISK_SYNC); + tmp->disk.raid_disk = -1; + dl = dl->next; + } + return mddev; +} + +static int update_super_imsm(struct supertype *st, struct mdinfo *info, + char *update, char *devname, int verbose, + int uuid_set, char *homehost) +{ + /* For 'assemble' and 'force' we need to return non-zero if any + * change was made. For others, the return value is ignored. + * Update options are: + * force-one : This device looks a bit old but needs to be included, + * update age info appropriately. + * assemble: clear any 'faulty' flag to allow this device to + * be assembled. + * force-array: Array is degraded but being forced, mark it clean + * if that will be needed to assemble it. + * + * newdev: not used ???? + * grow: Array has gained a new device - this is currently for + * linear only + * resync: mark as dirty so a resync will happen. + * name: update the name - preserving the homehost + * uuid: Change the uuid of the array to match watch is given + * + * Following are not relevant for this imsm: + * sparc2.2 : update from old dodgey metadata + * super-minor: change the preferred_minor number + * summaries: update redundant counters. + * homehost: update the recorded homehost + * _reshape_progress: record new reshape_progress position. + */ + int rv = 1; + struct intel_super *super = st->sb; + struct imsm_super *mpb; + + /* we can only update container info */ + if (!super || super->current_vol >= 0 || !super->anchor) + return 1; + + mpb = super->anchor; + + if (strcmp(update, "uuid") == 0) { + /* We take this to mean that the family_num should be updated. + * However that is much smaller than the uuid so we cannot really + * allow an explicit uuid to be given. And it is hard to reliably + * know if one was. + * So if !uuid_set we know the current uuid is random and just used + * the first 'int' and copy it to the other 3 positions. + * Otherwise we require the 4 'int's to be the same as would be the + * case if we are using a random uuid. So an explicit uuid will be + * accepted as long as all for ints are the same... which shouldn't hurt + */ + if (!uuid_set) { + info->uuid[1] = info->uuid[2] = info->uuid[3] = info->uuid[0]; + rv = 0; + } else { + if (info->uuid[0] != info->uuid[1] || + info->uuid[1] != info->uuid[2] || + info->uuid[2] != info->uuid[3]) + rv = -1; + else + rv = 0; + } + if (rv == 0) + mpb->orig_family_num = info->uuid[0]; + } else if (strcmp(update, "assemble") == 0) + rv = 0; + else + rv = -1; + + /* successful update? recompute checksum */ + if (rv == 0) + mpb->check_sum = __le32_to_cpu(__gen_imsm_checksum(mpb)); + + return rv; +} + +static size_t disks_to_mpb_size(int disks) +{ + size_t size; + + size = sizeof(struct imsm_super); + size += (disks - 1) * sizeof(struct imsm_disk); + size += 2 * sizeof(struct imsm_dev); + /* up to 2 maps per raid device (-2 for imsm_maps in imsm_dev */ + size += (4 - 2) * sizeof(struct imsm_map); + /* 4 possible disk_ord_tbl's */ + size += 4 * (disks - 1) * sizeof(__u32); + + return size; +} + +static __u64 avail_size_imsm(struct supertype *st, __u64 devsize, + unsigned long long data_offset) +{ + if (devsize < (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS)) + return 0; + + return devsize - (MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS); +} + +static void free_devlist(struct intel_super *super) +{ + struct intel_dev *dv; + + while (super->devlist) { + dv = super->devlist->next; + free(super->devlist->dev); + free(super->devlist); + super->devlist = dv; + } +} + +static void imsm_copy_dev(struct imsm_dev *dest, struct imsm_dev *src) +{ + memcpy(dest, src, sizeof_imsm_dev(src, 0)); +} + +static int compare_super_imsm(struct supertype *st, struct supertype *tst) +{ + /* + * return: + * 0 same, or first was empty, and second was copied + * 1 second had wrong number + * 2 wrong uuid + * 3 wrong other info + */ + struct intel_super *first = st->sb; + struct intel_super *sec = tst->sb; + + if (!first) { + st->sb = tst->sb; + tst->sb = NULL; + return 0; + } + /* in platform dependent environment test if the disks + * use the same Intel hba + * If not on Intel hba at all, allow anything. + */ + if (!check_env("IMSM_NO_PLATFORM")) { + if (first->hba && sec->hba && + strcmp(first->hba->path, sec->hba->path) != 0) { + fprintf(stderr, + "HBAs of devices does not match %s != %s\n", + first->hba ? first->hba->path : NULL, + sec->hba ? sec->hba->path : NULL); + return 3; + } + } + + /* if an anchor does not have num_raid_devs set then it is a free + * floating spare + */ + if (first->anchor->num_raid_devs > 0 && + sec->anchor->num_raid_devs > 0) { + /* Determine if these disks might ever have been + * related. Further disambiguation can only take place + * in load_super_imsm_all + */ + __u32 first_family = first->anchor->orig_family_num; + __u32 sec_family = sec->anchor->orig_family_num; + + if (memcmp(first->anchor->sig, sec->anchor->sig, + MAX_SIGNATURE_LENGTH) != 0) + return 3; + + if (first_family == 0) + first_family = first->anchor->family_num; + if (sec_family == 0) + sec_family = sec->anchor->family_num; + + if (first_family != sec_family) + return 3; + + } + + /* if 'first' is a spare promote it to a populated mpb with sec's + * family number + */ + if (first->anchor->num_raid_devs == 0 && + sec->anchor->num_raid_devs > 0) { + int i; + struct intel_dev *dv; + struct imsm_dev *dev; + + /* we need to copy raid device info from sec if an allocation + * fails here we don't associate the spare + */ + for (i = 0; i < sec->anchor->num_raid_devs; i++) { + dv = xmalloc(sizeof(*dv)); + dev = xmalloc(sizeof_imsm_dev(get_imsm_dev(sec, i), 1)); + dv->dev = dev; + dv->index = i; + dv->next = first->devlist; + first->devlist = dv; + } + if (i < sec->anchor->num_raid_devs) { + /* allocation failure */ + free_devlist(first); + pr_err("imsm: failed to associate spare\n"); + return 3; + } + first->anchor->num_raid_devs = sec->anchor->num_raid_devs; + first->anchor->orig_family_num = sec->anchor->orig_family_num; + first->anchor->family_num = sec->anchor->family_num; + memcpy(first->anchor->sig, sec->anchor->sig, MAX_SIGNATURE_LENGTH); + for (i = 0; i < sec->anchor->num_raid_devs; i++) + imsm_copy_dev(get_imsm_dev(first, i), get_imsm_dev(sec, i)); + } + + return 0; +} + +static void fd2devname(int fd, char *name) +{ + struct stat st; + char path[256]; + char dname[PATH_MAX]; + char *nm; + int rv; + + name[0] = '\0'; + if (fstat(fd, &st) != 0) + return; + sprintf(path, "/sys/dev/block/%d:%d", + major(st.st_rdev), minor(st.st_rdev)); + + rv = readlink(path, dname, sizeof(dname)-1); + if (rv <= 0) + return; + + dname[rv] = '\0'; + nm = strrchr(dname, '/'); + if (nm) { + nm++; + snprintf(name, MAX_RAID_SERIAL_LEN, "/dev/%s", nm); + } +} + +extern int scsi_get_serial(int fd, void *buf, size_t buf_len); + +static int imsm_read_serial(int fd, char *devname, + __u8 serial[MAX_RAID_SERIAL_LEN]) +{ + unsigned char scsi_serial[255]; + int rv; + int rsp_len; + int len; + char *dest; + char *src; + char *rsp_buf; + int i; + + memset(scsi_serial, 0, sizeof(scsi_serial)); + + rv = scsi_get_serial(fd, scsi_serial, sizeof(scsi_serial)); + + if (rv && check_env("IMSM_DEVNAME_AS_SERIAL")) { + memset(serial, 0, MAX_RAID_SERIAL_LEN); + fd2devname(fd, (char *) serial); + return 0; + } + + if (rv != 0) { + if (devname) + pr_err("Failed to retrieve serial for %s\n", + devname); + return rv; + } + + rsp_len = scsi_serial[3]; + if (!rsp_len) { + if (devname) + pr_err("Failed to retrieve serial for %s\n", + devname); + return 2; + } + rsp_buf = (char *) &scsi_serial[4]; + + /* trim all whitespace and non-printable characters and convert + * ':' to ';' + */ + for (i = 0, dest = rsp_buf; i < rsp_len; i++) { + src = &rsp_buf[i]; + if (*src > 0x20) { + /* ':' is reserved for use in placeholder serial + * numbers for missing disks + */ + if (*src == ':') + *dest++ = ';'; + else + *dest++ = *src; + } + } + len = dest - rsp_buf; + dest = rsp_buf; + + /* truncate leading characters */ + if (len > MAX_RAID_SERIAL_LEN) { + dest += len - MAX_RAID_SERIAL_LEN; + len = MAX_RAID_SERIAL_LEN; + } + + memset(serial, 0, MAX_RAID_SERIAL_LEN); + memcpy(serial, dest, len); + + return 0; +} + +static int serialcmp(__u8 *s1, __u8 *s2) +{ + return strncmp((char *) s1, (char *) s2, MAX_RAID_SERIAL_LEN); +} + +static void serialcpy(__u8 *dest, __u8 *src) +{ + strncpy((char *) dest, (char *) src, MAX_RAID_SERIAL_LEN); +} + +static struct dl *serial_to_dl(__u8 *serial, struct intel_super *super) +{ + struct dl *dl; + + for (dl = super->disks; dl; dl = dl->next) + if (serialcmp(dl->serial, serial) == 0) + break; + + return dl; +} + +static struct imsm_disk * +__serial_to_disk(__u8 *serial, struct imsm_super *mpb, int *idx) +{ + int i; + + for (i = 0; i < mpb->num_disks; i++) { + struct imsm_disk *disk = __get_imsm_disk(mpb, i); + + if (serialcmp(disk->serial, serial) == 0) { + if (idx) + *idx = i; + return disk; + } + } + + return NULL; +} + +static int +load_imsm_disk(int fd, struct intel_super *super, char *devname, int keep_fd) +{ + struct imsm_disk *disk; + struct dl *dl; + struct stat stb; + int rv; + char name[40]; + __u8 serial[MAX_RAID_SERIAL_LEN]; + + rv = imsm_read_serial(fd, devname, serial); + + if (rv != 0) + return 2; + + dl = xcalloc(1, sizeof(*dl)); + + fstat(fd, &stb); + dl->major = major(stb.st_rdev); + dl->minor = minor(stb.st_rdev); + dl->next = super->disks; + dl->fd = keep_fd ? fd : -1; + assert(super->disks == NULL); + super->disks = dl; + serialcpy(dl->serial, serial); + dl->index = -2; + dl->e = NULL; + fd2devname(fd, name); + if (devname) + dl->devname = xstrdup(devname); + else + dl->devname = xstrdup(name); + + /* look up this disk's index in the current anchor */ + disk = __serial_to_disk(dl->serial, super->anchor, &dl->index); + if (disk) { + dl->disk = *disk; + /* only set index on disks that are a member of a + * populated contianer, i.e. one with raid_devs + */ + if (is_failed(&dl->disk)) + dl->index = -2; + else if (is_spare(&dl->disk)) + dl->index = -1; + } + + return 0; +} + +#ifndef MDASSEMBLE +/* When migrating map0 contains the 'destination' state while map1 + * contains the current state. When not migrating map0 contains the + * current state. This routine assumes that map[0].map_state is set to + * the current array state before being called. + * + * Migration is indicated by one of the following states + * 1/ Idle (migr_state=0 map0state=normal||unitialized||degraded||failed) + * 2/ Initialize (migr_state=1 migr_type=MIGR_INIT map0state=normal + * map1state=unitialized) + * 3/ Repair (Resync) (migr_state=1 migr_type=MIGR_REPAIR map0state=normal + * map1state=normal) + * 4/ Rebuild (migr_state=1 migr_type=MIGR_REBUILD map0state=normal + * map1state=degraded) + * 5/ Migration (mig_state=1 migr_type=MIGR_GEN_MIGR map0state=normal + * map1state=normal) + */ +static void migrate(struct imsm_dev *dev, struct intel_super *super, + __u8 to_state, int migr_type) +{ + struct imsm_map *dest; + struct imsm_map *src = get_imsm_map(dev, MAP_0); + + dev->vol.migr_state = 1; + set_migr_type(dev, migr_type); + dev->vol.curr_migr_unit = 0; + dest = get_imsm_map(dev, MAP_1); + + /* duplicate and then set the target end state in map[0] */ + memcpy(dest, src, sizeof_imsm_map(src)); + if ((migr_type == MIGR_REBUILD) || + (migr_type == MIGR_GEN_MIGR)) { + __u32 ord; + int i; + + for (i = 0; i < src->num_members; i++) { + ord = __le32_to_cpu(src->disk_ord_tbl[i]); + set_imsm_ord_tbl_ent(src, i, ord_to_idx(ord)); + } + } + + if (migr_type == MIGR_GEN_MIGR) + /* Clear migration record */ + memset(super->migr_rec, 0, sizeof(struct migr_record)); + + src->map_state = to_state; +} + +static void end_migration(struct imsm_dev *dev, struct intel_super *super, + __u8 map_state) +{ + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_map *prev = get_imsm_map(dev, dev->vol.migr_state == 0 ? + MAP_0 : MAP_1); + int i, j; + + /* merge any IMSM_ORD_REBUILD bits that were not successfully + * completed in the last migration. + * + * FIXME add support for raid-level-migration + */ + if ((map_state != map->map_state) && (is_gen_migration(dev) == 0) && + (prev->map_state != IMSM_T_STATE_UNINITIALIZED)) { + /* when final map state is other than expected + * merge maps (not for migration) + */ + int failed; + + for (i = 0; i < prev->num_members; i++) + for (j = 0; j < map->num_members; j++) + /* during online capacity expansion + * disks position can be changed + * if takeover is used + */ + if (ord_to_idx(map->disk_ord_tbl[j]) == + ord_to_idx(prev->disk_ord_tbl[i])) { + map->disk_ord_tbl[j] |= + prev->disk_ord_tbl[i]; + break; + } + failed = imsm_count_failed(super, dev, MAP_0); + map_state = imsm_check_degraded(super, dev, failed, MAP_0); + } + + dev->vol.migr_state = 0; + set_migr_type(dev, 0); + dev->vol.curr_migr_unit = 0; + map->map_state = map_state; +} +#endif + +static int parse_raid_devices(struct intel_super *super) +{ + int i; + struct imsm_dev *dev_new; + size_t len, len_migr; + size_t max_len = 0; + size_t space_needed = 0; + struct imsm_super *mpb = super->anchor; + + for (i = 0; i < super->anchor->num_raid_devs; i++) { + struct imsm_dev *dev_iter = __get_imsm_dev(super->anchor, i); + struct intel_dev *dv; + + len = sizeof_imsm_dev(dev_iter, 0); + len_migr = sizeof_imsm_dev(dev_iter, 1); + if (len_migr > len) + space_needed += len_migr - len; + + dv = xmalloc(sizeof(*dv)); + if (max_len < len_migr) + max_len = len_migr; + if (max_len > len_migr) + space_needed += max_len - len_migr; + dev_new = xmalloc(max_len); + imsm_copy_dev(dev_new, dev_iter); + dv->dev = dev_new; + dv->index = i; + dv->next = super->devlist; + super->devlist = dv; + } + + /* ensure that super->buf is large enough when all raid devices + * are migrating + */ + if (__le32_to_cpu(mpb->mpb_size) + space_needed > super->len) { + void *buf; + + len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + space_needed, 512); + if (posix_memalign(&buf, 512, len) != 0) + return 1; + + memcpy(buf, super->buf, super->len); + memset(buf + super->len, 0, len - super->len); + free(super->buf); + super->buf = buf; + super->len = len; + } + + return 0; +} + +/* retrieve a pointer to the bbm log which starts after all raid devices */ +struct bbm_log *__get_imsm_bbm_log(struct imsm_super *mpb) +{ + void *ptr = NULL; + + if (__le32_to_cpu(mpb->bbm_log_size)) { + ptr = mpb; + ptr += mpb->mpb_size - __le32_to_cpu(mpb->bbm_log_size); + } + + return ptr; +} + +/******************************************************************************* + * Function: check_mpb_migr_compatibility + * Description: Function checks for unsupported migration features: + * - migration optimization area (pba_of_lba0) + * - descending reshape (ascending_migr) + * Parameters: + * super : imsm metadata information + * Returns: + * 0 : migration is compatible + * -1 : migration is not compatible + ******************************************************************************/ +int check_mpb_migr_compatibility(struct intel_super *super) +{ + struct imsm_map *map0, *map1; + struct migr_record *migr_rec = super->migr_rec; + int i; + + for (i = 0; i < super->anchor->num_raid_devs; i++) { + struct imsm_dev *dev_iter = __get_imsm_dev(super->anchor, i); + + if (dev_iter && + dev_iter->vol.migr_state == 1 && + dev_iter->vol.migr_type == MIGR_GEN_MIGR) { + /* This device is migrating */ + map0 = get_imsm_map(dev_iter, MAP_0); + map1 = get_imsm_map(dev_iter, MAP_1); + if (pba_of_lba0(map0) != pba_of_lba0(map1)) + /* migration optimization area was used */ + return -1; + if (migr_rec->ascending_migr == 0 + && migr_rec->dest_depth_per_unit > 0) + /* descending reshape not supported yet */ + return -1; + } + } + return 0; +} + +static void __free_imsm(struct intel_super *super, int free_disks); + +/* load_imsm_mpb - read matrix metadata + * allocates super->mpb to be freed by free_imsm + */ +static int load_imsm_mpb(int fd, struct intel_super *super, char *devname) +{ + unsigned long long dsize; + unsigned long long sectors; + struct stat; + struct imsm_super *anchor; + __u32 check_sum; + + get_dev_size(fd, NULL, &dsize); + if (dsize < 1024) { + if (devname) + pr_err("%s: device to small for imsm\n", + devname); + return 1; + } + + if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) { + if (devname) + pr_err("Cannot seek to anchor block on %s: %s\n", + devname, strerror(errno)); + return 1; + } + + if (posix_memalign((void**)&anchor, 512, 512) != 0) { + if (devname) + pr_err("Failed to allocate imsm anchor buffer" + " on %s\n", devname); + return 1; + } + if (read(fd, anchor, 512) != 512) { + if (devname) + pr_err("Cannot read anchor block on %s: %s\n", + devname, strerror(errno)); + free(anchor); + return 1; + } + + if (strncmp((char *) anchor->sig, MPB_SIGNATURE, MPB_SIG_LEN) != 0) { + if (devname) + pr_err("no IMSM anchor on %s\n", devname); + free(anchor); + return 2; + } + + __free_imsm(super, 0); + /* reload capability and hba */ + + /* capability and hba must be updated with new super allocation */ + find_intel_hba_capability(fd, super, devname); + super->len = ROUND_UP(anchor->mpb_size, 512); + if (posix_memalign(&super->buf, 512, super->len) != 0) { + if (devname) + pr_err("unable to allocate %zu byte mpb buffer\n", + super->len); + free(anchor); + return 2; + } + memcpy(super->buf, anchor, 512); + + sectors = mpb_sectors(anchor) - 1; + free(anchor); + + if (posix_memalign(&super->migr_rec_buf, 512, MIGR_REC_BUF_SIZE) != 0) { + pr_err("%s could not allocate migr_rec buffer\n", __func__); + free(super->buf); + return 2; + } + super->clean_migration_record_by_mdmon = 0; + + if (!sectors) { + check_sum = __gen_imsm_checksum(super->anchor); + if (check_sum != __le32_to_cpu(super->anchor->check_sum)) { + if (devname) + pr_err("IMSM checksum %x != %x on %s\n", + check_sum, + __le32_to_cpu(super->anchor->check_sum), + devname); + return 2; + } + + return 0; + } + + /* read the extended mpb */ + if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) { + if (devname) + pr_err("Cannot seek to extended mpb on %s: %s\n", + devname, strerror(errno)); + return 1; + } + + if ((unsigned)read(fd, super->buf + 512, super->len - 512) != super->len - 512) { + if (devname) + pr_err("Cannot read extended mpb on %s: %s\n", + devname, strerror(errno)); + return 2; + } + + check_sum = __gen_imsm_checksum(super->anchor); + if (check_sum != __le32_to_cpu(super->anchor->check_sum)) { + if (devname) + pr_err("IMSM checksum %x != %x on %s\n", + check_sum, __le32_to_cpu(super->anchor->check_sum), + devname); + return 3; + } + + /* FIXME the BBM log is disk specific so we cannot use this global + * buffer for all disks. Ok for now since we only look at the global + * bbm_log_size parameter to gate assembly + */ + super->bbm_log = __get_imsm_bbm_log(super->anchor); + + return 0; +} + +static int read_imsm_migr_rec(int fd, struct intel_super *super); + +/* clears hi bits in metadata if MPB_ATTRIB_2TB_DISK not set */ +static void clear_hi(struct intel_super *super) +{ + struct imsm_super *mpb = super->anchor; + int i, n; + if (mpb->attributes & MPB_ATTRIB_2TB_DISK) + return; + for (i = 0; i < mpb->num_disks; ++i) { + struct imsm_disk *disk = &mpb->disk[i]; + disk->total_blocks_hi = 0; + } + for (i = 0; i < mpb->num_raid_devs; ++i) { + struct imsm_dev *dev = get_imsm_dev(super, i); + if (!dev) + return; + for (n = 0; n < 2; ++n) { + struct imsm_map *map = get_imsm_map(dev, n); + if (!map) + continue; + map->pba_of_lba0_hi = 0; + map->blocks_per_member_hi = 0; + map->num_data_stripes_hi = 0; + } + } +} + +static int +load_and_parse_mpb(int fd, struct intel_super *super, char *devname, int keep_fd) +{ + int err; + + err = load_imsm_mpb(fd, super, devname); + if (err) + return err; + err = load_imsm_disk(fd, super, devname, keep_fd); + if (err) + return err; + err = parse_raid_devices(super); + clear_hi(super); + return err; +} + +static void __free_imsm_disk(struct dl *d) +{ + if (d->fd >= 0) + close(d->fd); + if (d->devname) + free(d->devname); + if (d->e) + free(d->e); + free(d); + +} + +static void free_imsm_disks(struct intel_super *super) +{ + struct dl *d; + + while (super->disks) { + d = super->disks; + super->disks = d->next; + __free_imsm_disk(d); + } + while (super->disk_mgmt_list) { + d = super->disk_mgmt_list; + super->disk_mgmt_list = d->next; + __free_imsm_disk(d); + } + while (super->missing) { + d = super->missing; + super->missing = d->next; + __free_imsm_disk(d); + } + +} + +/* free all the pieces hanging off of a super pointer */ +static void __free_imsm(struct intel_super *super, int free_disks) +{ + struct intel_hba *elem, *next; + + if (super->buf) { + free(super->buf); + super->buf = NULL; + } + /* unlink capability description */ + super->orom = NULL; + if (super->migr_rec_buf) { + free(super->migr_rec_buf); + super->migr_rec_buf = NULL; + } + if (free_disks) + free_imsm_disks(super); + free_devlist(super); + elem = super->hba; + while (elem) { + if (elem->path) + free((void *)elem->path); + next = elem->next; + free(elem); + elem = next; + } + super->hba = NULL; +} + +static void free_imsm(struct intel_super *super) +{ + __free_imsm(super, 1); + free(super); +} + +static void free_super_imsm(struct supertype *st) +{ + struct intel_super *super = st->sb; + + if (!super) + return; + + free_imsm(super); + st->sb = NULL; +} + +static struct intel_super *alloc_super(void) +{ + struct intel_super *super = xcalloc(1, sizeof(*super)); + + super->current_vol = -1; + super->create_offset = ~((unsigned long long) 0); + return super; +} + +/* + * find and allocate hba and OROM/EFI based on valid fd of RAID component device + */ +static int find_intel_hba_capability(int fd, struct intel_super *super, char *devname) +{ + struct sys_dev *hba_name; + int rv = 0; + + if ((fd < 0) || check_env("IMSM_NO_PLATFORM")) { + super->orom = NULL; + super->hba = NULL; + return 0; + } + hba_name = find_disk_attached_hba(fd, NULL); + if (!hba_name) { + if (devname) + pr_err("%s is not attached to Intel(R) RAID controller.\n", + devname); + return 1; + } + rv = attach_hba_to_super(super, hba_name); + if (rv == 2) { + if (devname) { + struct intel_hba *hba = super->hba; + + pr_err("%s is attached to Intel(R) %s RAID " + "controller (%s),\n" + " but the container is assigned to Intel(R) " + "%s RAID controller (", + devname, + hba_name->path, + hba_name->pci_id ? : "Err!", + get_sys_dev_type(hba_name->type)); + + while (hba) { + fprintf(stderr, "%s", hba->pci_id ? : "Err!"); + if (hba->next) + fprintf(stderr, ", "); + hba = hba->next; + } + + fprintf(stderr, ").\n"); + cont_err("Mixing devices attached to multiple controllers " + "is not allowed.\n"); + } + return 2; + } + super->orom = find_imsm_capability(hba_name->type); + if (!super->orom) + return 3; + return 0; +} + +/* find_missing - helper routine for load_super_imsm_all that identifies + * disks that have disappeared from the system. This routine relies on + * the mpb being uptodate, which it is at load time. + */ +static int find_missing(struct intel_super *super) +{ + int i; + struct imsm_super *mpb = super->anchor; + struct dl *dl; + struct imsm_disk *disk; + + for (i = 0; i < mpb->num_disks; i++) { + disk = __get_imsm_disk(mpb, i); + dl = serial_to_dl(disk->serial, super); + if (dl) + continue; + + dl = xmalloc(sizeof(*dl)); + dl->major = 0; + dl->minor = 0; + dl->fd = -1; + dl->devname = xstrdup("missing"); + dl->index = i; + serialcpy(dl->serial, disk->serial); + dl->disk = *disk; + dl->e = NULL; + dl->next = super->missing; + super->missing = dl; + } + + return 0; +} + +#ifndef MDASSEMBLE +static struct intel_disk *disk_list_get(__u8 *serial, struct intel_disk *disk_list) +{ + struct intel_disk *idisk = disk_list; + + while (idisk) { + if (serialcmp(idisk->disk.serial, serial) == 0) + break; + idisk = idisk->next; + } + + return idisk; +} + +static int __prep_thunderdome(struct intel_super **table, int tbl_size, + struct intel_super *super, + struct intel_disk **disk_list) +{ + struct imsm_disk *d = &super->disks->disk; + struct imsm_super *mpb = super->anchor; + int i, j; + + for (i = 0; i < tbl_size; i++) { + struct imsm_super *tbl_mpb = table[i]->anchor; + struct imsm_disk *tbl_d = &table[i]->disks->disk; + + if (tbl_mpb->family_num == mpb->family_num) { + if (tbl_mpb->check_sum == mpb->check_sum) { + dprintf("%s: mpb from %d:%d matches %d:%d\n", + __func__, super->disks->major, + super->disks->minor, + table[i]->disks->major, + table[i]->disks->minor); + break; + } + + if (((is_configured(d) && !is_configured(tbl_d)) || + is_configured(d) == is_configured(tbl_d)) && + tbl_mpb->generation_num < mpb->generation_num) { + /* current version of the mpb is a + * better candidate than the one in + * super_table, but copy over "cross + * generational" status + */ + struct intel_disk *idisk; + + dprintf("%s: mpb from %d:%d replaces %d:%d\n", + __func__, super->disks->major, + super->disks->minor, + table[i]->disks->major, + table[i]->disks->minor); + + idisk = disk_list_get(tbl_d->serial, *disk_list); + if (idisk && is_failed(&idisk->disk)) + tbl_d->status |= FAILED_DISK; + break; + } else { + struct intel_disk *idisk; + struct imsm_disk *disk; + + /* tbl_mpb is more up to date, but copy + * over cross generational status before + * returning + */ + disk = __serial_to_disk(d->serial, mpb, NULL); + if (disk && is_failed(disk)) + d->status |= FAILED_DISK; + + idisk = disk_list_get(d->serial, *disk_list); + if (idisk) { + idisk->owner = i; + if (disk && is_configured(disk)) + idisk->disk.status |= CONFIGURED_DISK; + } + + dprintf("%s: mpb from %d:%d prefer %d:%d\n", + __func__, super->disks->major, + super->disks->minor, + table[i]->disks->major, + table[i]->disks->minor); + + return tbl_size; + } + } + } + + if (i >= tbl_size) + table[tbl_size++] = super; + else + table[i] = super; + + /* update/extend the merged list of imsm_disk records */ + for (j = 0; j < mpb->num_disks; j++) { + struct imsm_disk *disk = __get_imsm_disk(mpb, j); + struct intel_disk *idisk; + + idisk = disk_list_get(disk->serial, *disk_list); + if (idisk) { + idisk->disk.status |= disk->status; + if (is_configured(&idisk->disk) || + is_failed(&idisk->disk)) + idisk->disk.status &= ~(SPARE_DISK); + } else { + idisk = xcalloc(1, sizeof(*idisk)); + idisk->owner = IMSM_UNKNOWN_OWNER; + idisk->disk = *disk; + idisk->next = *disk_list; + *disk_list = idisk; + } + + if (serialcmp(idisk->disk.serial, d->serial) == 0) + idisk->owner = i; + } + + return tbl_size; +} + +static struct intel_super * +validate_members(struct intel_super *super, struct intel_disk *disk_list, + const int owner) +{ + struct imsm_super *mpb = super->anchor; + int ok_count = 0; + int i; + + for (i = 0; i < mpb->num_disks; i++) { + struct imsm_disk *disk = __get_imsm_disk(mpb, i); + struct intel_disk *idisk; + + idisk = disk_list_get(disk->serial, disk_list); + if (idisk) { + if (idisk->owner == owner || + idisk->owner == IMSM_UNKNOWN_OWNER) + ok_count++; + else + dprintf("%s: '%.16s' owner %d != %d\n", + __func__, disk->serial, idisk->owner, + owner); + } else { + dprintf("%s: unknown disk %x [%d]: %.16s\n", + __func__, __le32_to_cpu(mpb->family_num), i, + disk->serial); + break; + } + } + + if (ok_count == mpb->num_disks) + return super; + return NULL; +} + +static void show_conflicts(__u32 family_num, struct intel_super *super_list) +{ + struct intel_super *s; + + for (s = super_list; s; s = s->next) { + if (family_num != s->anchor->family_num) + continue; + pr_err("Conflict, offlining family %#x on '%s'\n", + __le32_to_cpu(family_num), s->disks->devname); + } +} + +static struct intel_super * +imsm_thunderdome(struct intel_super **super_list, int len) +{ + struct intel_super *super_table[len]; + struct intel_disk *disk_list = NULL; + struct intel_super *champion, *spare; + struct intel_super *s, **del; + int tbl_size = 0; + int conflict; + int i; + + memset(super_table, 0, sizeof(super_table)); + for (s = *super_list; s; s = s->next) + tbl_size = __prep_thunderdome(super_table, tbl_size, s, &disk_list); + + for (i = 0; i < tbl_size; i++) { + struct imsm_disk *d; + struct intel_disk *idisk; + struct imsm_super *mpb = super_table[i]->anchor; + + s = super_table[i]; + d = &s->disks->disk; + + /* 'd' must appear in merged disk list for its + * configuration to be valid + */ + idisk = disk_list_get(d->serial, disk_list); + if (idisk && idisk->owner == i) + s = validate_members(s, disk_list, i); + else + s = NULL; + + if (!s) + dprintf("%s: marking family: %#x from %d:%d offline\n", + __func__, mpb->family_num, + super_table[i]->disks->major, + super_table[i]->disks->minor); + super_table[i] = s; + } + + /* This is where the mdadm implementation differs from the Windows + * driver which has no strict concept of a container. We can only + * assemble one family from a container, so when returning a prodigal + * array member to this system the code will not be able to disambiguate + * the container contents that should be assembled ("foreign" versus + * "local"). It requires user intervention to set the orig_family_num + * to a new value to establish a new container. The Windows driver in + * this situation fixes up the volume name in place and manages the + * foreign array as an independent entity. + */ + s = NULL; + spare = NULL; + conflict = 0; + for (i = 0; i < tbl_size; i++) { + struct intel_super *tbl_ent = super_table[i]; + int is_spare = 0; + + if (!tbl_ent) + continue; + + if (tbl_ent->anchor->num_raid_devs == 0) { + spare = tbl_ent; + is_spare = 1; + } + + if (s && !is_spare) { + show_conflicts(tbl_ent->anchor->family_num, *super_list); + conflict++; + } else if (!s && !is_spare) + s = tbl_ent; + } + + if (!s) + s = spare; + if (!s) { + champion = NULL; + goto out; + } + champion = s; + + if (conflict) + pr_err("Chose family %#x on '%s', " + "assemble conflicts to new container with '--update=uuid'\n", + __le32_to_cpu(s->anchor->family_num), s->disks->devname); + + /* collect all dl's onto 'champion', and update them to + * champion's version of the status + */ + for (s = *super_list; s; s = s->next) { + struct imsm_super *mpb = champion->anchor; + struct dl *dl = s->disks; + + if (s == champion) + continue; + + mpb->attributes |= s->anchor->attributes & MPB_ATTRIB_2TB_DISK; + + for (i = 0; i < mpb->num_disks; i++) { + struct imsm_disk *disk; + + disk = __serial_to_disk(dl->serial, mpb, &dl->index); + if (disk) { + dl->disk = *disk; + /* only set index on disks that are a member of + * a populated contianer, i.e. one with + * raid_devs + */ + if (is_failed(&dl->disk)) + dl->index = -2; + else if (is_spare(&dl->disk)) + dl->index = -1; + break; + } + } + + if (i >= mpb->num_disks) { + struct intel_disk *idisk; + + idisk = disk_list_get(dl->serial, disk_list); + if (idisk && is_spare(&idisk->disk) && + !is_failed(&idisk->disk) && !is_configured(&idisk->disk)) + dl->index = -1; + else { + dl->index = -2; + continue; + } + } + + dl->next = champion->disks; + champion->disks = dl; + s->disks = NULL; + } + + /* delete 'champion' from super_list */ + for (del = super_list; *del; ) { + if (*del == champion) { + *del = (*del)->next; + break; + } else + del = &(*del)->next; + } + champion->next = NULL; + + out: + while (disk_list) { + struct intel_disk *idisk = disk_list; + + disk_list = disk_list->next; + free(idisk); + } + + return champion; +} + +static int +get_sra_super_block(int fd, struct intel_super **super_list, char *devname, int *max, int keep_fd); +static int get_super_block(struct intel_super **super_list, char *devnm, char *devname, + int major, int minor, int keep_fd); +static int +get_devlist_super_block(struct md_list *devlist, struct intel_super **super_list, + int *max, int keep_fd); + +static int load_super_imsm_all(struct supertype *st, int fd, void **sbp, + char *devname, struct md_list *devlist, + int keep_fd) +{ + struct intel_super *super_list = NULL; + struct intel_super *super = NULL; + int err = 0; + int i = 0; + + if (fd >= 0) + /* 'fd' is an opened container */ + err = get_sra_super_block(fd, &super_list, devname, &i, keep_fd); + else + /* get super block from devlist devices */ + err = get_devlist_super_block(devlist, &super_list, &i, keep_fd); + if (err) + goto error; + /* all mpbs enter, maybe one leaves */ + super = imsm_thunderdome(&super_list, i); + if (!super) { + err = 1; + goto error; + } + + if (find_missing(super) != 0) { + free_imsm(super); + err = 2; + goto error; + } + + /* load migration record */ + err = load_imsm_migr_rec(super, NULL); + if (err == -1) { + /* migration is in progress, + * but migr_rec cannot be loaded, + */ + err = 4; + goto error; + } + + /* Check migration compatibility */ + if ((err == 0) && (check_mpb_migr_compatibility(super) != 0)) { + pr_err("Unsupported migration detected"); + if (devname) + fprintf(stderr, " on %s\n", devname); + else + fprintf(stderr, " (IMSM).\n"); + + err = 5; + goto error; + } + + err = 0; + + error: + while (super_list) { + struct intel_super *s = super_list; + + super_list = super_list->next; + free_imsm(s); + } + + if (err) + return err; + + *sbp = super; + if (fd >= 0) + strcpy(st->container_devnm, fd2devnm(fd)); + else + st->container_devnm[0] = 0; + if (err == 0 && st->ss == NULL) { + st->ss = &super_imsm; + st->minor_version = 0; + st->max_devs = IMSM_MAX_DEVICES; + } + return 0; +} + +static int +get_devlist_super_block(struct md_list *devlist, struct intel_super **super_list, + int *max, int keep_fd) +{ + struct md_list *tmpdev; + int err = 0; + int i = 0; + + for (i = 0, tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { + if (tmpdev->used != 1) + continue; + if (tmpdev->container == 1) { + int lmax = 0; + int fd = dev_open(tmpdev->devname, O_RDONLY|O_EXCL); + if (fd < 0) { + pr_err("cannot open device %s: %s\n", + tmpdev->devname, strerror(errno)); + err = 8; + goto error; + } + err = get_sra_super_block(fd, super_list, + tmpdev->devname, &lmax, + keep_fd); + i += lmax; + close(fd); + if (err) { + err = 7; + goto error; + } + } else { + int major = major(tmpdev->st_rdev); + int minor = minor(tmpdev->st_rdev); + err = get_super_block(super_list, + NULL, + tmpdev->devname, + major, minor, + keep_fd); + i++; + if (err) { + err = 6; + goto error; + } + } + } + error: + *max = i; + return err; +} + +static int get_super_block(struct intel_super **super_list, char *devnm, char *devname, + int major, int minor, int keep_fd) +{ + struct intel_super*s = NULL; + char nm[32]; + int dfd = -1; + int err = 0; + int retry; + + s = alloc_super(); + if (!s) { + err = 1; + goto error; + } + + sprintf(nm, "%d:%d", major, minor); + dfd = dev_open(nm, O_RDWR); + if (dfd < 0) { + err = 2; + goto error; + } + + find_intel_hba_capability(dfd, s, devname); + err = load_and_parse_mpb(dfd, s, NULL, keep_fd); + + /* retry the load if we might have raced against mdmon */ + if (err == 3 && devnm && mdmon_running(devnm)) + for (retry = 0; retry < 3; retry++) { + usleep(3000); + err = load_and_parse_mpb(dfd, s, NULL, keep_fd); + if (err != 3) + break; + } + error: + if (!err) { + s->next = *super_list; + *super_list = s; + } else { + if (s) + free(s); + if (dfd >= 0) + close(dfd); + } + if ((dfd >= 0) && (!keep_fd)) + close(dfd); + return err; + +} + +static int +get_sra_super_block(int fd, struct intel_super **super_list, char *devname, int *max, int keep_fd) +{ + struct mdinfo *sra; + char *devnm; + struct mdinfo *sd; + int err = 0; + int i = 0; + sra = sysfs_read(fd, NULL, GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE); + if (!sra) + return 1; + + if (sra->array.major_version != -1 || + sra->array.minor_version != -2 || + strcmp(sra->text_version, "imsm") != 0) { + err = 1; + goto error; + } + /* load all mpbs */ + devnm = fd2devnm(fd); + for (sd = sra->devs, i = 0; sd; sd = sd->next, i++) { + if (get_super_block(super_list, devnm, devname, + sd->disk.major, sd->disk.minor, keep_fd) != 0) { + err = 7; + goto error; + } + } + error: + sysfs_free(sra); + *max = i; + return err; +} + +static int load_container_imsm(struct supertype *st, int fd, char *devname) +{ + return load_super_imsm_all(st, fd, &st->sb, devname, NULL, 1); +} +#endif + +static int load_super_imsm(struct supertype *st, int fd, char *devname) +{ + struct intel_super *super; + int rv; + int retry; + + if (test_partition(fd)) + /* IMSM not allowed on partitions */ + return 1; + + free_super_imsm(st); + + super = alloc_super(); + /* Load hba and capabilities if they exist. + * But do not preclude loading metadata in case capabilities or hba are + * non-compliant and ignore_hw_compat is set. + */ + rv = find_intel_hba_capability(fd, super, devname); + /* no orom/efi or non-intel hba of the disk */ + if ((rv != 0) && (st->ignore_hw_compat == 0)) { + if (devname) + pr_err("No OROM/EFI properties for %s\n", devname); + free_imsm(super); + return 2; + } + rv = load_and_parse_mpb(fd, super, devname, 0); + + /* retry the load if we might have raced against mdmon */ + if (rv == 3) { + struct mdstat_ent *mdstat = mdstat_by_component(fd2devnm(fd)); + + if (mdstat && mdmon_running(mdstat->devnm) && getpid() != mdmon_pid(mdstat->devnm)) { + for (retry = 0; retry < 3; retry++) { + usleep(3000); + rv = load_and_parse_mpb(fd, super, devname, 0); + if (rv != 3) + break; + } + } + + free_mdstat(mdstat); + } + + if (rv) { + if (devname) + pr_err("Failed to load all information " + "sections on %s\n", devname); + free_imsm(super); + return rv; + } + + st->sb = super; + if (st->ss == NULL) { + st->ss = &super_imsm; + st->minor_version = 0; + st->max_devs = IMSM_MAX_DEVICES; + } + + /* load migration record */ + if (load_imsm_migr_rec(super, NULL) == 0) { + /* Check for unsupported migration features */ + if (check_mpb_migr_compatibility(super) != 0) { + pr_err("Unsupported migration detected"); + if (devname) + fprintf(stderr, " on %s\n", devname); + else + fprintf(stderr, " (IMSM).\n"); + return 3; + } + } + + return 0; +} + +static __u16 info_to_blocks_per_strip(mdu_array_info_t *info) +{ + if (info->level == 1) + return 128; + return info->chunk_size >> 9; +} + +static unsigned long long info_to_blocks_per_member(mdu_array_info_t *info, + unsigned long long size) +{ + if (info->level == 1) + return size * 2; + else + return (size * 2) & ~(info_to_blocks_per_strip(info) - 1); +} + +static void imsm_update_version_info(struct intel_super *super) +{ + /* update the version and attributes */ + struct imsm_super *mpb = super->anchor; + char *version; + struct imsm_dev *dev; + struct imsm_map *map; + int i; + + for (i = 0; i < mpb->num_raid_devs; i++) { + dev = get_imsm_dev(super, i); + map = get_imsm_map(dev, MAP_0); + if (__le32_to_cpu(dev->size_high) > 0) + mpb->attributes |= MPB_ATTRIB_2TB; + + /* FIXME detect when an array spans a port multiplier */ + #if 0 + mpb->attributes |= MPB_ATTRIB_PM; + #endif + + if (mpb->num_raid_devs > 1 || + mpb->attributes != MPB_ATTRIB_CHECKSUM_VERIFY) { + version = MPB_VERSION_ATTRIBS; + switch (get_imsm_raid_level(map)) { + case 0: mpb->attributes |= MPB_ATTRIB_RAID0; break; + case 1: mpb->attributes |= MPB_ATTRIB_RAID1; break; + case 10: mpb->attributes |= MPB_ATTRIB_RAID10; break; + case 5: mpb->attributes |= MPB_ATTRIB_RAID5; break; + } + } else { + if (map->num_members >= 5) + version = MPB_VERSION_5OR6_DISK_ARRAY; + else if (dev->status == DEV_CLONE_N_GO) + version = MPB_VERSION_CNG; + else if (get_imsm_raid_level(map) == 5) + version = MPB_VERSION_RAID5; + else if (map->num_members >= 3) + version = MPB_VERSION_3OR4_DISK_ARRAY; + else if (get_imsm_raid_level(map) == 1) + version = MPB_VERSION_RAID1; + else + version = MPB_VERSION_RAID0; + } + strcpy(((char *) mpb->sig) + strlen(MPB_SIGNATURE), version); + } +} + +static int check_name(struct intel_super *super, char *name, int quiet) +{ + struct imsm_super *mpb = super->anchor; + char *reason = NULL; + int i; + + if (strlen(name) > MAX_RAID_SERIAL_LEN) + reason = "must be 16 characters or less"; + + for (i = 0; i < mpb->num_raid_devs; i++) { + struct imsm_dev *dev = get_imsm_dev(super, i); + + if (strncmp((char *) dev->volume, name, MAX_RAID_SERIAL_LEN) == 0) { + reason = "already exists"; + break; + } + } + + if (reason && !quiet) + pr_err("imsm volume name %s\n", reason); + + return !reason; +} + +static int init_super_imsm_volume(struct supertype *st, mdu_array_info_t *info, + unsigned long long size, char *name, + char *homehost, int *uuid, + long long data_offset) +{ + /* We are creating a volume inside a pre-existing container. + * so st->sb is already set. + */ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + struct intel_dev *dv; + struct imsm_dev *dev; + struct imsm_vol *vol; + struct imsm_map *map; + int idx = mpb->num_raid_devs; + int i; + unsigned long long array_blocks; + size_t size_old, size_new; + unsigned long long num_data_stripes; + + if (super->orom && mpb->num_raid_devs >= super->orom->vpa) { + pr_err("This imsm-container already has the " + "maximum of %d volumes\n", super->orom->vpa); + return 0; + } + + /* ensure the mpb is large enough for the new data */ + size_old = __le32_to_cpu(mpb->mpb_size); + size_new = disks_to_mpb_size(info->nr_disks); + if (size_new > size_old) { + void *mpb_new; + size_t size_round = ROUND_UP(size_new, 512); + + if (posix_memalign(&mpb_new, 512, size_round) != 0) { + pr_err("could not allocate new mpb\n"); + return 0; + } + if (posix_memalign(&super->migr_rec_buf, 512, + MIGR_REC_BUF_SIZE) != 0) { + pr_err("%s could not allocate migr_rec buffer\n", + __func__); + free(super->buf); + free(super); + free(mpb_new); + return 0; + } + memcpy(mpb_new, mpb, size_old); + free(mpb); + mpb = mpb_new; + super->anchor = mpb_new; + mpb->mpb_size = __cpu_to_le32(size_new); + memset(mpb_new + size_old, 0, size_round - size_old); + } + super->current_vol = idx; + + /* handle 'failed_disks' by either: + * a) create dummy disk entries in the table if this the first + * volume in the array. We add them here as this is the only + * opportunity to add them. add_to_super_imsm_volume() + * handles the non-failed disks and continues incrementing + * mpb->num_disks. + * b) validate that 'failed_disks' matches the current number + * of missing disks if the container is populated + */ + if (super->current_vol == 0) { + mpb->num_disks = 0; + for (i = 0; i < info->failed_disks; i++) { + struct imsm_disk *disk; + + mpb->num_disks++; + disk = __get_imsm_disk(mpb, i); + disk->status = CONFIGURED_DISK | FAILED_DISK; + disk->scsi_id = __cpu_to_le32(~(__u32)0); + snprintf((char *) disk->serial, MAX_RAID_SERIAL_LEN, + "missing:%d", i); + } + find_missing(super); + } else { + int missing = 0; + struct dl *d; + + for (d = super->missing; d; d = d->next) + missing++; + if (info->failed_disks > missing) { + pr_err("unable to add 'missing' disk to container\n"); + return 0; + } + } + + if (!check_name(super, name, 0)) + return 0; + dv = xmalloc(sizeof(*dv)); + dev = xcalloc(1, sizeof(*dev) + sizeof(__u32) * (info->raid_disks - 1)); + strncpy((char *) dev->volume, name, MAX_RAID_SERIAL_LEN); + array_blocks = calc_array_size(info->level, info->raid_disks, + info->layout, info->chunk_size, + size * 2); + /* round array size down to closest MB */ + array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT; + + dev->size_low = __cpu_to_le32((__u32) array_blocks); + dev->size_high = __cpu_to_le32((__u32) (array_blocks >> 32)); + dev->status = (DEV_READ_COALESCING | DEV_WRITE_COALESCING); + vol = &dev->vol; + vol->migr_state = 0; + set_migr_type(dev, MIGR_INIT); + vol->dirty = !info->state; + vol->curr_migr_unit = 0; + map = get_imsm_map(dev, MAP_0); + set_pba_of_lba0(map, super->create_offset); + set_blocks_per_member(map, info_to_blocks_per_member(info, size)); + map->blocks_per_strip = __cpu_to_le16(info_to_blocks_per_strip(info)); + map->failed_disk_num = ~0; + if (info->level > 0) + map->map_state = (info->state ? IMSM_T_STATE_NORMAL + : IMSM_T_STATE_UNINITIALIZED); + else + map->map_state = info->failed_disks ? IMSM_T_STATE_FAILED : + IMSM_T_STATE_NORMAL; + map->ddf = 1; + + if (info->level == 1 && info->raid_disks > 2) { + free(dev); + free(dv); + pr_err("imsm does not support more than 2 disks" + "in a raid1 volume\n"); + return 0; + } + + map->raid_level = info->level; + if (info->level == 10) { + map->raid_level = 1; + map->num_domains = info->raid_disks / 2; + } else if (info->level == 1) + map->num_domains = info->raid_disks; + else + map->num_domains = 1; + + /* info->size is only int so use the 'size' parameter instead */ + num_data_stripes = (size * 2) / info_to_blocks_per_strip(info); + num_data_stripes /= map->num_domains; + set_num_data_stripes(map, num_data_stripes); + + map->num_members = info->raid_disks; + for (i = 0; i < map->num_members; i++) { + /* initialized in add_to_super */ + set_imsm_ord_tbl_ent(map, i, IMSM_ORD_REBUILD); + } + mpb->num_raid_devs++; + + dv->dev = dev; + dv->index = super->current_vol; + dv->next = super->devlist; + super->devlist = dv; + + imsm_update_version_info(super); + + return 1; +} + +static int init_super_imsm(struct supertype *st, mdu_array_info_t *info, + unsigned long long size, char *name, + char *homehost, int *uuid, + unsigned long long data_offset) +{ + /* This is primarily called by Create when creating a new array. + * We will then get add_to_super called for each component, and then + * write_init_super called to write it out to each device. + * For IMSM, Create can create on fresh devices or on a pre-existing + * array. + * To create on a pre-existing array a different method will be called. + * This one is just for fresh drives. + */ + struct intel_super *super; + struct imsm_super *mpb; + size_t mpb_size; + char *version; + + if (data_offset != INVALID_SECTORS) { + pr_err("data-offset not supported by imsm\n"); + return 0; + } + + if (st->sb) + return init_super_imsm_volume(st, info, size, name, homehost, uuid, + data_offset); + + if (info) + mpb_size = disks_to_mpb_size(info->nr_disks); + else + mpb_size = 512; + + super = alloc_super(); + if (super && posix_memalign(&super->buf, 512, mpb_size) != 0) { + free(super); + super = NULL; + } + if (!super) { + pr_err("%s could not allocate superblock\n", __func__); + return 0; + } + if (posix_memalign(&super->migr_rec_buf, 512, MIGR_REC_BUF_SIZE) != 0) { + pr_err("%s could not allocate migr_rec buffer\n", __func__); + free(super->buf); + free(super); + return 0; + } + memset(super->buf, 0, mpb_size); + mpb = super->buf; + mpb->mpb_size = __cpu_to_le32(mpb_size); + st->sb = super; + + if (info == NULL) { + /* zeroing superblock */ + return 0; + } + + mpb->attributes = MPB_ATTRIB_CHECKSUM_VERIFY; + + version = (char *) mpb->sig; + strcpy(version, MPB_SIGNATURE); + version += strlen(MPB_SIGNATURE); + strcpy(version, MPB_VERSION_RAID0); + + return 1; +} + +#ifndef MDASSEMBLE +static int add_to_super_imsm_volume(struct supertype *st, mdu_disk_info_t *dk, + int fd, char *devname) +{ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + struct imsm_disk *_disk; + struct imsm_dev *dev; + struct imsm_map *map; + struct dl *dl, *df; + int slot; + + dev = get_imsm_dev(super, super->current_vol); + map = get_imsm_map(dev, MAP_0); + + if (! (dk->state & (1<<MD_DISK_SYNC))) { + pr_err("%s: Cannot add spare devices to IMSM volume\n", + devname); + return 1; + } + + if (fd == -1) { + /* we're doing autolayout so grab the pre-marked (in + * validate_geometry) raid_disk + */ + for (dl = super->disks; dl; dl = dl->next) + if (dl->raiddisk == dk->raid_disk) + break; + } else { + for (dl = super->disks; dl ; dl = dl->next) + if (dl->major == dk->major && + dl->minor == dk->minor) + break; + } + + if (!dl) { + pr_err("%s is not a member of the same container\n", devname); + return 1; + } + + /* add a pristine spare to the metadata */ + if (dl->index < 0) { + dl->index = super->anchor->num_disks; + super->anchor->num_disks++; + } + /* Check the device has not already been added */ + slot = get_imsm_disk_slot(map, dl->index); + if (slot >= 0 && + (get_imsm_ord_tbl_ent(dev, slot, MAP_X) & IMSM_ORD_REBUILD) == 0) { + pr_err("%s has been included in this array twice\n", + devname); + return 1; + } + set_imsm_ord_tbl_ent(map, dk->raid_disk, dl->index); + dl->disk.status = CONFIGURED_DISK; + + /* update size of 'missing' disks to be at least as large as the + * largest acitve member (we only have dummy missing disks when + * creating the first volume) + */ + if (super->current_vol == 0) { + for (df = super->missing; df; df = df->next) { + if (total_blocks(&dl->disk) > total_blocks(&df->disk)) + set_total_blocks(&df->disk, total_blocks(&dl->disk)); + _disk = __get_imsm_disk(mpb, df->index); + *_disk = df->disk; + } + } + + /* refresh unset/failed slots to point to valid 'missing' entries */ + for (df = super->missing; df; df = df->next) + for (slot = 0; slot < mpb->num_disks; slot++) { + __u32 ord = get_imsm_ord_tbl_ent(dev, slot, MAP_X); + + if ((ord & IMSM_ORD_REBUILD) == 0) + continue; + set_imsm_ord_tbl_ent(map, slot, df->index | IMSM_ORD_REBUILD); + if (is_gen_migration(dev)) { + struct imsm_map *map2 = get_imsm_map(dev, + MAP_1); + int slot2 = get_imsm_disk_slot(map2, df->index); + if ((slot2 < map2->num_members) && + (slot2 >= 0)) { + __u32 ord2 = get_imsm_ord_tbl_ent(dev, + slot2, + MAP_1); + if ((unsigned)df->index == + ord_to_idx(ord2)) + set_imsm_ord_tbl_ent(map2, + slot2, + df->index | + IMSM_ORD_REBUILD); + } + } + dprintf("set slot:%d to missing disk:%d\n", slot, df->index); + break; + } + + /* if we are creating the first raid device update the family number */ + if (super->current_vol == 0) { + __u32 sum; + struct imsm_dev *_dev = __get_imsm_dev(mpb, 0); + + _disk = __get_imsm_disk(mpb, dl->index); + if (!_dev || !_disk) { + pr_err("BUG mpb setup error\n"); + return 1; + } + *_dev = *dev; + *_disk = dl->disk; + sum = random32(); + sum += __gen_imsm_checksum(mpb); + mpb->family_num = __cpu_to_le32(sum); + mpb->orig_family_num = mpb->family_num; + } + super->current_disk = dl; + return 0; +} + +/* mark_spare() + * Function marks disk as spare and restores disk serial + * in case it was previously marked as failed by takeover operation + * reruns: + * -1 : critical error + * 0 : disk is marked as spare but serial is not set + * 1 : success + */ +int mark_spare(struct dl *disk) +{ + __u8 serial[MAX_RAID_SERIAL_LEN]; + int ret_val = -1; + + if (!disk) + return ret_val; + + ret_val = 0; + if (!imsm_read_serial(disk->fd, NULL, serial)) { + /* Restore disk serial number, because takeover marks disk + * as failed and adds to serial ':0' before it becomes + * a spare disk. + */ + serialcpy(disk->serial, serial); + serialcpy(disk->disk.serial, serial); + ret_val = 1; + } + disk->disk.status = SPARE_DISK; + disk->index = -1; + + return ret_val; +} + +static int add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk, + int fd, char *devname, + unsigned long long data_offset) +{ + struct intel_super *super = st->sb; + struct dl *dd; + unsigned long long size; + __u32 id; + int rv; + struct stat stb; + + /* If we are on an RAID enabled platform check that the disk is + * attached to the raid controller. + * We do not need to test disks attachment for container based additions, + * they shall be already tested when container was created/assembled. + */ + rv = find_intel_hba_capability(fd, super, devname); + /* no orom/efi or non-intel hba of the disk */ + if (rv != 0) { + dprintf("capability: %p fd: %d ret: %d\n", + super->orom, fd, rv); + return 1; + } + + if (super->current_vol >= 0) + return add_to_super_imsm_volume(st, dk, fd, devname); + + fstat(fd, &stb); + dd = xcalloc(sizeof(*dd), 1); + dd->major = major(stb.st_rdev); + dd->minor = minor(stb.st_rdev); + dd->devname = devname ? xstrdup(devname) : NULL; + dd->fd = fd; + dd->e = NULL; + dd->action = DISK_ADD; + rv = imsm_read_serial(fd, devname, dd->serial); + if (rv) { + pr_err("failed to retrieve scsi serial, aborting\n"); + free(dd); + abort(); + } + + get_dev_size(fd, NULL, &size); + size /= 512; + serialcpy(dd->disk.serial, dd->serial); + set_total_blocks(&dd->disk, size); + if (__le32_to_cpu(dd->disk.total_blocks_hi) > 0) { + struct imsm_super *mpb = super->anchor; + mpb->attributes |= MPB_ATTRIB_2TB_DISK; + } + mark_spare(dd); + if (sysfs_disk_to_scsi_id(fd, &id) == 0) + dd->disk.scsi_id = __cpu_to_le32(id); + else + dd->disk.scsi_id = __cpu_to_le32(0); + + if (st->update_tail) { + dd->next = super->disk_mgmt_list; + super->disk_mgmt_list = dd; + } else { + dd->next = super->disks; + super->disks = dd; + super->updates_pending++; + } + + return 0; +} + +static int remove_from_super_imsm(struct supertype *st, mdu_disk_info_t *dk) +{ + struct intel_super *super = st->sb; + struct dl *dd; + + /* remove from super works only in mdmon - for communication + * manager - monitor. Check if communication memory buffer + * is prepared. + */ + if (!st->update_tail) { + pr_err("%s shall be used in mdmon context only" + "(line %d).\n", __func__, __LINE__); + return 1; + } + dd = xcalloc(1, sizeof(*dd)); + dd->major = dk->major; + dd->minor = dk->minor; + dd->fd = -1; + mark_spare(dd); + dd->action = DISK_REMOVE; + + dd->next = super->disk_mgmt_list; + super->disk_mgmt_list = dd; + + return 0; +} + +static int store_imsm_mpb(int fd, struct imsm_super *mpb); + +static union { + char buf[512]; + struct imsm_super anchor; +} spare_record __attribute__ ((aligned(512))); + +/* spare records have their own family number and do not have any defined raid + * devices + */ +static int write_super_imsm_spares(struct intel_super *super, int doclose) +{ + struct imsm_super *mpb = super->anchor; + struct imsm_super *spare = &spare_record.anchor; + __u32 sum; + struct dl *d; + + spare->mpb_size = __cpu_to_le32(sizeof(struct imsm_super)), + spare->generation_num = __cpu_to_le32(1UL), + spare->attributes = MPB_ATTRIB_CHECKSUM_VERIFY; + spare->num_disks = 1, + spare->num_raid_devs = 0, + spare->cache_size = mpb->cache_size, + spare->pwr_cycle_count = __cpu_to_le32(1), + + snprintf((char *) spare->sig, MAX_SIGNATURE_LENGTH, + MPB_SIGNATURE MPB_VERSION_RAID0); + + for (d = super->disks; d; d = d->next) { + if (d->index != -1) + continue; + + spare->disk[0] = d->disk; + if (__le32_to_cpu(d->disk.total_blocks_hi) > 0) + spare->attributes |= MPB_ATTRIB_2TB_DISK; + + sum = __gen_imsm_checksum(spare); + spare->family_num = __cpu_to_le32(sum); + spare->orig_family_num = 0; + sum = __gen_imsm_checksum(spare); + spare->check_sum = __cpu_to_le32(sum); + + if (store_imsm_mpb(d->fd, spare)) { + pr_err("%s: failed for device %d:%d %s\n", + __func__, d->major, d->minor, strerror(errno)); + return 1; + } + if (doclose) { + close(d->fd); + d->fd = -1; + } + } + + return 0; +} + +static int write_super_imsm(struct supertype *st, int doclose) +{ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + struct dl *d; + __u32 generation; + __u32 sum; + int spares = 0; + int i; + __u32 mpb_size = sizeof(struct imsm_super) - sizeof(struct imsm_disk); + int num_disks = 0; + int clear_migration_record = 1; + + /* 'generation' is incremented everytime the metadata is written */ + generation = __le32_to_cpu(mpb->generation_num); + generation++; + mpb->generation_num = __cpu_to_le32(generation); + + /* fix up cases where previous mdadm releases failed to set + * orig_family_num + */ + if (mpb->orig_family_num == 0) + mpb->orig_family_num = mpb->family_num; + + for (d = super->disks; d; d = d->next) { + if (d->index == -1) + spares++; + else { + mpb->disk[d->index] = d->disk; + num_disks++; + } + } + for (d = super->missing; d; d = d->next) { + mpb->disk[d->index] = d->disk; + num_disks++; + } + mpb->num_disks = num_disks; + mpb_size += sizeof(struct imsm_disk) * mpb->num_disks; + + for (i = 0; i < mpb->num_raid_devs; i++) { + struct imsm_dev *dev = __get_imsm_dev(mpb, i); + struct imsm_dev *dev2 = get_imsm_dev(super, i); + if (dev && dev2) { + imsm_copy_dev(dev, dev2); + mpb_size += sizeof_imsm_dev(dev, 0); + } + if (is_gen_migration(dev2)) + clear_migration_record = 0; + } + mpb_size += __le32_to_cpu(mpb->bbm_log_size); + mpb->mpb_size = __cpu_to_le32(mpb_size); + + /* recalculate checksum */ + sum = __gen_imsm_checksum(mpb); + mpb->check_sum = __cpu_to_le32(sum); + + if (super->clean_migration_record_by_mdmon) { + clear_migration_record = 1; + super->clean_migration_record_by_mdmon = 0; + } + if (clear_migration_record) + memset(super->migr_rec_buf, 0, MIGR_REC_BUF_SIZE); + + /* write the mpb for disks that compose raid devices */ + for (d = super->disks; d ; d = d->next) { + if (d->index < 0 || is_failed(&d->disk)) + continue; + + if (clear_migration_record) { + unsigned long long dsize; + + get_dev_size(d->fd, NULL, &dsize); + if (lseek64(d->fd, dsize - 512, SEEK_SET) >= 0) { + if (write(d->fd, super->migr_rec_buf, + MIGR_REC_BUF_SIZE) != MIGR_REC_BUF_SIZE) + perror("Write migr_rec failed"); + } + } + + if (store_imsm_mpb(d->fd, mpb)) + fprintf(stderr, + "%s: failed for device %d:%d (fd: %d)%s\n", + __func__, d->major, d->minor, + d->fd, strerror(errno)); + + if (doclose) { + close(d->fd); + d->fd = -1; + } + } + + if (spares) + return write_super_imsm_spares(super, doclose); + + return 0; +} + +static int create_array(struct supertype *st, int dev_idx) +{ + size_t len; + struct imsm_update_create_array *u; + struct intel_super *super = st->sb; + struct imsm_dev *dev = get_imsm_dev(super, dev_idx); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct disk_info *inf; + struct imsm_disk *disk; + int i; + + len = sizeof(*u) - sizeof(*dev) + sizeof_imsm_dev(dev, 0) + + sizeof(*inf) * map->num_members; + u = xmalloc(len); + u->type = update_create_array; + u->dev_idx = dev_idx; + imsm_copy_dev(&u->dev, dev); + inf = get_disk_info(u); + for (i = 0; i < map->num_members; i++) { + int idx = get_imsm_disk_idx(dev, i, MAP_X); + + disk = get_imsm_disk(super, idx); + if (!disk) + disk = get_imsm_missing(super, idx); + serialcpy(inf[i].serial, disk->serial); + } + append_metadata_update(st, u, len); + + return 0; +} + +static int mgmt_disk(struct supertype *st) +{ + struct intel_super *super = st->sb; + size_t len; + struct imsm_update_add_remove_disk *u; + + if (!super->disk_mgmt_list) + return 0; + + len = sizeof(*u); + u = xmalloc(len); + u->type = update_add_remove_disk; + append_metadata_update(st, u, len); + + return 0; +} + +static int write_init_super_imsm(struct supertype *st) +{ + struct intel_super *super = st->sb; + int current_vol = super->current_vol; + + /* we are done with current_vol reset it to point st at the container */ + super->current_vol = -1; + + if (st->update_tail) { + /* queue the recently created array / added disk + * as a metadata update */ + int rv; + + /* determine if we are creating a volume or adding a disk */ + if (current_vol < 0) { + /* in the mgmt (add/remove) disk case we are running + * in mdmon context, so don't close fd's + */ + return mgmt_disk(st); + } else + rv = create_array(st, current_vol); + + return rv; + } else { + struct dl *d; + for (d = super->disks; d; d = d->next) + Kill(d->devname, NULL, 0, -1, 1); + return write_super_imsm(st, 1); + } +} +#endif + +static int store_super_imsm(struct supertype *st, int fd) +{ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super ? super->anchor : NULL; + + if (!mpb) + return 1; + +#ifndef MDASSEMBLE + return store_imsm_mpb(fd, mpb); +#else + return 1; +#endif +} + +static int imsm_bbm_log_size(struct imsm_super *mpb) +{ + return __le32_to_cpu(mpb->bbm_log_size); +} + +#ifndef MDASSEMBLE +static int validate_geometry_imsm_container(struct supertype *st, int level, + int layout, int raiddisks, int chunk, + unsigned long long size, + unsigned long long data_offset, + char *dev, + unsigned long long *freesize, + int verbose) +{ + int fd; + unsigned long long ldsize; + struct intel_super *super=NULL; + int rv = 0; + + if (level != LEVEL_CONTAINER) + return 0; + if (!dev) + return 1; + + fd = open(dev, O_RDONLY|O_EXCL, 0); + if (fd < 0) { + if (verbose > 0) + pr_err("imsm: Cannot open %s: %s\n", + dev, strerror(errno)); + return 0; + } + if (!get_dev_size(fd, dev, &ldsize)) { + close(fd); + return 0; + } + + /* capabilities retrieve could be possible + * note that there is no fd for the disks in array. + */ + super = alloc_super(); + rv = find_intel_hba_capability(fd, super, verbose > 0 ? dev : NULL); + if (rv != 0) { +#if DEBUG + char str[256]; + fd2devname(fd, str); + dprintf("validate_geometry_imsm_container: fd: %d %s orom: %p rv: %d raiddisk: %d\n", + fd, str, super->orom, rv, raiddisks); +#endif + /* no orom/efi or non-intel hba of the disk */ + close(fd); + free_imsm(super); + return 0; + } + close(fd); + if (super->orom) { + if (raiddisks > super->orom->tds) { + if (verbose) + pr_err("%d exceeds maximum number of" + " platform supported disks: %d\n", + raiddisks, super->orom->tds); + free_imsm(super); + return 0; + } + if ((super->orom->attr & IMSM_OROM_ATTR_2TB_DISK) == 0 && + (ldsize >> 9) >> 32 > 0) { + if (verbose) + pr_err("%s exceeds maximum platform supported size\n", dev); + free_imsm(super); + return 0; + } + } + + *freesize = avail_size_imsm(st, ldsize >> 9, data_offset); + free_imsm(super); + + return 1; +} + +static unsigned long long find_size(struct extent *e, int *idx, int num_extents) +{ + const unsigned long long base_start = e[*idx].start; + unsigned long long end = base_start + e[*idx].size; + int i; + + if (base_start == end) + return 0; + + *idx = *idx + 1; + for (i = *idx; i < num_extents; i++) { + /* extend overlapping extents */ + if (e[i].start >= base_start && + e[i].start <= end) { + if (e[i].size == 0) + return 0; + if (e[i].start + e[i].size > end) + end = e[i].start + e[i].size; + } else if (e[i].start > end) { + *idx = i; + break; + } + } + + return end - base_start; +} + +static unsigned long long merge_extents(struct intel_super *super, int sum_extents) +{ + /* build a composite disk with all known extents and generate a new + * 'maxsize' given the "all disks in an array must share a common start + * offset" constraint + */ + struct extent *e = xcalloc(sum_extents, sizeof(*e)); + struct dl *dl; + int i, j; + int start_extent; + unsigned long long pos; + unsigned long long start = 0; + unsigned long long maxsize; + unsigned long reserve; + + /* coalesce and sort all extents. also, check to see if we need to + * reserve space between member arrays + */ + j = 0; + for (dl = super->disks; dl; dl = dl->next) { + if (!dl->e) + continue; + for (i = 0; i < dl->extent_cnt; i++) + e[j++] = dl->e[i]; + } + qsort(e, sum_extents, sizeof(*e), cmp_extent); + + /* merge extents */ + i = 0; + j = 0; + while (i < sum_extents) { + e[j].start = e[i].start; + e[j].size = find_size(e, &i, sum_extents); + j++; + if (e[j-1].size == 0) + break; + } + + pos = 0; + maxsize = 0; + start_extent = 0; + i = 0; + do { + unsigned long long esize; + + esize = e[i].start - pos; + if (esize >= maxsize) { + maxsize = esize; + start = pos; + start_extent = i; + } + pos = e[i].start + e[i].size; + i++; + } while (e[i-1].size); + free(e); + + if (maxsize == 0) + return 0; + + /* FIXME assumes volume at offset 0 is the first volume in a + * container + */ + if (start_extent > 0) + reserve = IMSM_RESERVED_SECTORS; /* gap between raid regions */ + else + reserve = 0; + + if (maxsize < reserve) + return 0; + + super->create_offset = ~((unsigned long long) 0); + if (start + reserve > super->create_offset) + return 0; /* start overflows create_offset */ + super->create_offset = start + reserve; + + return maxsize - reserve; +} + +static int is_raid_level_supported(const struct imsm_orom *orom, int level, int raiddisks) +{ + if (level < 0 || level == 6 || level == 4) + return 0; + + /* if we have an orom prevent invalid raid levels */ + if (orom) + switch (level) { + case 0: return imsm_orom_has_raid0(orom); + case 1: + if (raiddisks > 2) + return imsm_orom_has_raid1e(orom); + return imsm_orom_has_raid1(orom) && raiddisks == 2; + case 10: return imsm_orom_has_raid10(orom) && raiddisks == 4; + case 5: return imsm_orom_has_raid5(orom) && raiddisks > 2; + } + else + return 1; /* not on an Intel RAID platform so anything goes */ + + return 0; +} + +static int +active_arrays_by_format(char *name, char* hba, struct md_list **devlist, + int dpa, int verbose) +{ + struct mdstat_ent *mdstat = mdstat_read(0, 0); + struct mdstat_ent *memb = NULL; + int count = 0; + int num = 0; + struct md_list *dv = NULL; + int found; + + for (memb = mdstat ; memb ; memb = memb->next) { + if (memb->metadata_version && + (strncmp(memb->metadata_version, "external:", 9) == 0) && + (strcmp(&memb->metadata_version[9], name) == 0) && + !is_subarray(memb->metadata_version+9) && + memb->members) { + struct dev_member *dev = memb->members; + int fd = -1; + while(dev && (fd < 0)) { + char *path = xmalloc(strlen(dev->name) + strlen("/dev/") + 1); + num = sprintf(path, "%s%s", "/dev/", dev->name); + if (num > 0) + fd = open(path, O_RDONLY, 0); + if ((num <= 0) || (fd < 0)) { + pr_vrb(": Cannot open %s: %s\n", + dev->name, strerror(errno)); + } + free(path); + dev = dev->next; + } + found = 0; + if ((fd >= 0) && disk_attached_to_hba(fd, hba)) { + struct mdstat_ent *vol; + for (vol = mdstat ; vol ; vol = vol->next) { + if ((vol->active > 0) && + vol->metadata_version && + is_container_member(vol, memb->dev)) { + found++; + count++; + } + } + if (*devlist && (found < dpa)) { + dv = xcalloc(1, sizeof(*dv)); + dv->devname = xmalloc(strlen(memb->dev) + strlen("/dev/") + 1); + sprintf(dv->devname, "%s%s", "/dev/", memb->dev); + dv->found = found; + dv->used = 0; + dv->next = *devlist; + *devlist = dv; + } + } + if (fd >= 0) + close(fd); + } + } + free_mdstat(mdstat); + return count; +} + +#ifdef DEBUG_LOOP +static struct md_list* +get_loop_devices(void) +{ + int i; + struct md_list *devlist = NULL; + struct md_list *dv = NULL; + + for(i = 0; i < 12; i++) { + dv = xcalloc(1, sizeof(*dv)); + dv->devname = xmalloc(40); + sprintf(dv->devname, "/dev/loop%d", i); + dv->next = devlist; + devlist = dv; + } + return devlist; +} +#endif + +static struct md_list* +get_devices(const char *hba_path) +{ + struct md_list *devlist = NULL; + struct md_list *dv = NULL; + struct dirent *ent; + DIR *dir; + int err = 0; + +#if DEBUG_LOOP + devlist = get_loop_devices(); + return devlist; +#endif + /* scroll through /sys/dev/block looking for devices attached to + * this hba + */ + dir = opendir("/sys/dev/block"); + for (ent = dir ? readdir(dir) : NULL; ent; ent = readdir(dir)) { + int fd; + char buf[1024]; + int major, minor; + char *path = NULL; + if (sscanf(ent->d_name, "%d:%d", &major, &minor) != 2) + continue; + path = devt_to_devpath(makedev(major, minor)); + if (!path) + continue; + if (!path_attached_to_hba(path, hba_path)) { + free(path); + path = NULL; + continue; + } + free(path); + path = NULL; + fd = dev_open(ent->d_name, O_RDONLY); + if (fd >= 0) { + fd2devname(fd, buf); + close(fd); + } else { + pr_err("cannot open device: %s\n", + ent->d_name); + continue; + } + + dv = xcalloc(1, sizeof(*dv)); + dv->devname = xstrdup(buf); + dv->next = devlist; + devlist = dv; + } + if (err) { + while(devlist) { + dv = devlist; + devlist = devlist->next; + free(dv->devname); + free(dv); + } + } + closedir(dir); + return devlist; +} + +static int +count_volumes_list(struct md_list *devlist, char *homehost, + int verbose, int *found) +{ + struct md_list *tmpdev; + int count = 0; + struct supertype *st = NULL; + + /* first walk the list of devices to find a consistent set + * that match the criterea, if that is possible. + * We flag the ones we like with 'used'. + */ + *found = 0; + st = match_metadata_desc_imsm("imsm"); + if (st == NULL) { + pr_vrb(": cannot allocate memory for imsm supertype\n"); + return 0; + } + + for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { + char *devname = tmpdev->devname; + struct stat stb; + struct supertype *tst; + int dfd; + if (tmpdev->used > 1) + continue; + tst = dup_super(st); + if (tst == NULL) { + pr_vrb(": cannot allocate memory for imsm supertype\n"); + goto err_1; + } + tmpdev->container = 0; + dfd = dev_open(devname, O_RDONLY|O_EXCL); + if (dfd < 0) { + dprintf(": cannot open device %s: %s\n", + devname, strerror(errno)); + tmpdev->used = 2; + } else if (fstat(dfd, &stb)< 0) { + /* Impossible! */ + dprintf(": fstat failed for %s: %s\n", + devname, strerror(errno)); + tmpdev->used = 2; + } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { + dprintf(": %s is not a block device.\n", + devname); + tmpdev->used = 2; + } else if (must_be_container(dfd)) { + struct supertype *cst; + cst = super_by_fd(dfd, NULL); + if (cst == NULL) { + dprintf(": cannot recognize container type %s\n", + devname); + tmpdev->used = 2; + } else if (tst->ss != st->ss) { + dprintf(": non-imsm container - ignore it: %s\n", + devname); + tmpdev->used = 2; + } else if (!tst->ss->load_container || + tst->ss->load_container(tst, dfd, NULL)) + tmpdev->used = 2; + else { + tmpdev->container = 1; + } + if (cst) + cst->ss->free_super(cst); + } else { + tmpdev->st_rdev = stb.st_rdev; + if (tst->ss->load_super(tst,dfd, NULL)) { + dprintf(": no RAID superblock on %s\n", + devname); + tmpdev->used = 2; + } else if (tst->ss->compare_super == NULL) { + dprintf(": Cannot assemble %s metadata on %s\n", + tst->ss->name, devname); + tmpdev->used = 2; + } + } + if (dfd >= 0) + close(dfd); + if (tmpdev->used == 2 || tmpdev->used == 4) { + /* Ignore unrecognised devices during auto-assembly */ + goto loop; + } + else { + struct mdinfo info; + tst->ss->getinfo_super(tst, &info, NULL); + + if (st->minor_version == -1) + st->minor_version = tst->minor_version; + + if (memcmp(info.uuid, uuid_zero, + sizeof(int[4])) == 0) { + /* this is a floating spare. It cannot define + * an array unless there are no more arrays of + * this type to be found. It can be included + * in an array of this type though. + */ + tmpdev->used = 3; + goto loop; + } + + if (st->ss != tst->ss || + st->minor_version != tst->minor_version || + st->ss->compare_super(st, tst) != 0) { + /* Some mismatch. If exactly one array matches this host, + * we can resolve on that one. + * Or, if we are auto assembling, we just ignore the second + * for now. + */ + dprintf(": superblock on %s doesn't match others - assembly aborted\n", + devname); + goto loop; + } + tmpdev->used = 1; + *found = 1; + dprintf("found: devname: %s\n", devname); + } + loop: + if (tst) + tst->ss->free_super(tst); + } + if (*found != 0) { + int err; + if ((err = load_super_imsm_all(st, -1, &st->sb, NULL, devlist, 0)) == 0) { + struct mdinfo *iter, *head = st->ss->container_content(st, NULL); + for (iter = head; iter; iter = iter->next) { + dprintf("content->text_version: %s vol\n", + iter->text_version); + if (iter->array.state & (1<<MD_SB_BLOCK_VOLUME)) { + /* do not assemble arrays with unsupported + configurations */ + dprintf(": Cannot activate member %s.\n", + iter->text_version); + } else + count++; + } + sysfs_free(head); + + } else { + dprintf(" no valid super block on device list: err: %d %p\n", + err, st->sb); + } + } else { + dprintf(" no more devices to examin\n"); + } + + for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) { + if ((tmpdev->used == 1) && (tmpdev->found)) { + if (count) { + if (count < tmpdev->found) + count = 0; + else + count -= tmpdev->found; + } + } + if (tmpdev->used == 1) + tmpdev->used = 4; + } + err_1: + if (st) + st->ss->free_super(st); + return count; +} + +static int +count_volumes(char *hba, int dpa, int verbose) +{ + struct md_list *devlist = NULL; + int count = 0; + int found = 0;; + + devlist = get_devices(hba); + /* if no intel devices return zero volumes */ + if (devlist == NULL) + return 0; + + count = active_arrays_by_format("imsm", hba, &devlist, dpa, verbose); + dprintf(" path: %s active arrays: %d\n", hba, count); + if (devlist == NULL) + return 0; + do { + found = 0; + count += count_volumes_list(devlist, + NULL, + verbose, + &found); + dprintf("found %d count: %d\n", found, count); + } while (found); + + dprintf("path: %s total number of volumes: %d\n", hba, count); + + while(devlist) { + struct md_list *dv = devlist; + devlist = devlist->next; + free(dv->devname); + free(dv); + } + return count; +} + +static int imsm_default_chunk(const struct imsm_orom *orom) +{ + /* up to 512 if the plaform supports it, otherwise the platform max. + * 128 if no platform detected + */ + int fs = max(7, orom ? fls(orom->sss) : 0); + + return min(512, (1 << fs)); +} + +static int +validate_geometry_imsm_orom(struct intel_super *super, int level, int layout, + int raiddisks, int *chunk, unsigned long long size, int verbose) +{ + /* check/set platform and metadata limits/defaults */ + if (super->orom && raiddisks > super->orom->dpa) { + pr_vrb(": platform supports a maximum of %d disks per array\n", + super->orom->dpa); + return 0; + } + + /* capabilities of OROM tested - copied from validate_geometry_imsm_volume */ + if (!is_raid_level_supported(super->orom, level, raiddisks)) { + pr_vrb(": platform does not support raid%d with %d disk%s\n", + level, raiddisks, raiddisks > 1 ? "s" : ""); + return 0; + } + + if (*chunk == 0 || *chunk == UnSet) + *chunk = imsm_default_chunk(super->orom); + + if (super->orom && !imsm_orom_has_chunk(super->orom, *chunk)) { + pr_vrb(": platform does not support a chunk size of: " + "%d\n", *chunk); + return 0; + } + + if (layout != imsm_level_to_layout(level)) { + if (level == 5) + pr_vrb(": imsm raid 5 only supports the left-asymmetric layout\n"); + else if (level == 10) + pr_vrb(": imsm raid 10 only supports the n2 layout\n"); + else + pr_vrb(": imsm unknown layout %#x for this raid level %d\n", + layout, level); + return 0; + } + + if (super->orom && (super->orom->attr & IMSM_OROM_ATTR_2TB) == 0 && + (calc_array_size(level, raiddisks, layout, *chunk, size) >> 32) > 0) { + pr_vrb(": platform does not support a volume size over 2TB\n"); + return 0; + } + return 1; +} + +/* validate_geometry_imsm_volume - lifted from validate_geometry_ddf_bvd + * FIX ME add ahci details + */ +static int validate_geometry_imsm_volume(struct supertype *st, int level, + int layout, int raiddisks, int *chunk, + unsigned long long size, + unsigned long long data_offset, + char *dev, + unsigned long long *freesize, + int verbose) +{ + struct stat stb; + struct intel_super *super = st->sb; + struct imsm_super *mpb; + struct dl *dl; + unsigned long long pos = 0; + unsigned long long maxsize; + struct extent *e; + int i; + + /* We must have the container info already read in. */ + if (!super) + return 0; + + mpb = super->anchor; + + if (!validate_geometry_imsm_orom(super, level, layout, raiddisks, chunk, size, verbose)) { + pr_err("RAID gemetry validation failed. " + "Cannot proceed with the action(s).\n"); + return 0; + } + if (!dev) { + /* General test: make sure there is space for + * 'raiddisks' device extents of size 'size' at a given + * offset + */ + unsigned long long minsize = size; + unsigned long long start_offset = MaxSector; + int dcnt = 0; + if (minsize == 0) + minsize = MPB_SECTOR_CNT + IMSM_RESERVED_SECTORS; + for (dl = super->disks; dl ; dl = dl->next) { + int found = 0; + + pos = 0; + i = 0; + e = get_extents(super, dl); + if (!e) continue; + do { + unsigned long long esize; + esize = e[i].start - pos; + if (esize >= minsize) + found = 1; + if (found && start_offset == MaxSector) { + start_offset = pos; + break; + } else if (found && pos != start_offset) { + found = 0; + break; + } + pos = e[i].start + e[i].size; + i++; + } while (e[i-1].size); + if (found) + dcnt++; + free(e); + } + if (dcnt < raiddisks) { + if (verbose) + pr_err("imsm: Not enough " + "devices with space for this array " + "(%d < %d)\n", + dcnt, raiddisks); + return 0; + } + return 1; + } + + /* This device must be a member of the set */ + if (stat(dev, &stb) < 0) + return 0; + if ((S_IFMT & stb.st_mode) != S_IFBLK) + return 0; + for (dl = super->disks ; dl ; dl = dl->next) { + if (dl->major == (int)major(stb.st_rdev) && + dl->minor == (int)minor(stb.st_rdev)) + break; + } + if (!dl) { + if (verbose) + pr_err("%s is not in the " + "same imsm set\n", dev); + return 0; + } else if (super->orom && dl->index < 0 && mpb->num_raid_devs) { + /* If a volume is present then the current creation attempt + * cannot incorporate new spares because the orom may not + * understand this configuration (all member disks must be + * members of each array in the container). + */ + pr_err("%s is a spare and a volume" + " is already defined for this container\n", dev); + pr_err("The option-rom requires all member" + " disks to be a member of all volumes\n"); + return 0; + } else if (super->orom && mpb->num_raid_devs > 0 && + mpb->num_disks != raiddisks) { + pr_err("The option-rom requires all member" + " disks to be a member of all volumes\n"); + return 0; + } + + /* retrieve the largest free space block */ + e = get_extents(super, dl); + maxsize = 0; + i = 0; + if (e) { + do { + unsigned long long esize; + + esize = e[i].start - pos; + if (esize >= maxsize) + maxsize = esize; + pos = e[i].start + e[i].size; + i++; + } while (e[i-1].size); + dl->e = e; + dl->extent_cnt = i; + } else { + if (verbose) + pr_err("unable to determine free space for: %s\n", + dev); + return 0; + } + if (maxsize < size) { + if (verbose) + pr_err("%s not enough space (%llu < %llu)\n", + dev, maxsize, size); + return 0; + } + + /* count total number of extents for merge */ + i = 0; + for (dl = super->disks; dl; dl = dl->next) + if (dl->e) + i += dl->extent_cnt; + + maxsize = merge_extents(super, i); + + if (!check_env("IMSM_NO_PLATFORM") && + mpb->num_raid_devs > 0 && size && size != maxsize) { + pr_err("attempting to create a second " + "volume with size less then remaining space. " + "Aborting...\n"); + return 0; + } + + if (maxsize < size || maxsize == 0) { + if (verbose) { + if (maxsize == 0) + pr_err("no free space" + " left on device. Aborting...\n"); + else + pr_err("not enough space" + " to create volume of given size" + " (%llu < %llu). Aborting...\n", + maxsize, size); + } + return 0; + } + + *freesize = maxsize; + + if (super->orom) { + int count = count_volumes(super->hba->path, + super->orom->dpa, verbose); + if (super->orom->vphba <= count) { + pr_vrb(": platform does not support more than %d raid volumes.\n", + super->orom->vphba); + return 0; + } + } + return 1; +} + +static int imsm_get_free_size(struct supertype *st, int raiddisks, + unsigned long long size, int chunk, + unsigned long long *freesize) +{ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + struct dl *dl; + int i; + int extent_cnt; + struct extent *e; + unsigned long long maxsize; + unsigned long long minsize; + int cnt; + int used; + + /* find the largest common start free region of the possible disks */ + used = 0; + extent_cnt = 0; + cnt = 0; + for (dl = super->disks; dl; dl = dl->next) { + dl->raiddisk = -1; + + if (dl->index >= 0) + used++; + + /* don't activate new spares if we are orom constrained + * and there is already a volume active in the container + */ + if (super->orom && dl->index < 0 && mpb->num_raid_devs) + continue; + + e = get_extents(super, dl); + if (!e) + continue; + for (i = 1; e[i-1].size; i++) + ; + dl->e = e; + dl->extent_cnt = i; + extent_cnt += i; + cnt++; + } + + maxsize = merge_extents(super, extent_cnt); + minsize = size; + if (size == 0) + /* chunk is in K */ + minsize = chunk * 2; + + if (cnt < raiddisks || + (super->orom && used && used != raiddisks) || + maxsize < minsize || + maxsize == 0) { + pr_err("not enough devices with space to create array.\n"); + return 0; /* No enough free spaces large enough */ + } + + if (size == 0) { + size = maxsize; + if (chunk) { + size /= 2 * chunk; + size *= 2 * chunk; + } + maxsize = size; + } + if (!check_env("IMSM_NO_PLATFORM") && + mpb->num_raid_devs > 0 && size && size != maxsize) { + pr_err("attempting to create a second " + "volume with size less then remaining space. " + "Aborting...\n"); + return 0; + } + cnt = 0; + for (dl = super->disks; dl; dl = dl->next) + if (dl->e) + dl->raiddisk = cnt++; + + *freesize = size; + + dprintf("imsm: imsm_get_free_size() returns : %llu\n", size); + + return 1; +} + +static int reserve_space(struct supertype *st, int raiddisks, + unsigned long long size, int chunk, + unsigned long long *freesize) +{ + struct intel_super *super = st->sb; + struct dl *dl; + int cnt; + int rv = 0; + + rv = imsm_get_free_size(st, raiddisks, size, chunk, freesize); + if (rv) { + cnt = 0; + for (dl = super->disks; dl; dl = dl->next) + if (dl->e) + dl->raiddisk = cnt++; + rv = 1; + } + + return rv; +} + +static int validate_geometry_imsm(struct supertype *st, int level, int layout, + int raiddisks, int *chunk, unsigned long long size, + unsigned long long data_offset, + char *dev, unsigned long long *freesize, + int verbose) +{ + int fd, cfd; + struct mdinfo *sra; + int is_member = 0; + + /* load capability + * if given unused devices create a container + * if given given devices in a container create a member volume + */ + if (level == LEVEL_CONTAINER) { + /* Must be a fresh device to add to a container */ + return validate_geometry_imsm_container(st, level, layout, + raiddisks, + *chunk, + size, data_offset, + dev, freesize, + verbose); + } + + if (!dev) { + if (st->sb) { + struct intel_super *super = st->sb; + if (!validate_geometry_imsm_orom(st->sb, level, layout, + raiddisks, chunk, size, + verbose)) + return 0; + /* we are being asked to automatically layout a + * new volume based on the current contents of + * the container. If the the parameters can be + * satisfied reserve_space will record the disks, + * start offset, and size of the volume to be + * created. add_to_super and getinfo_super + * detect when autolayout is in progress. + */ + /* assuming that freesize is always given when array is + created */ + if (super->orom && freesize) { + int count; + count = count_volumes(super->hba->path, + super->orom->dpa, verbose); + if (super->orom->vphba <= count) { + pr_vrb(": platform does not support more" + " than %d raid volumes.\n", + super->orom->vphba); + return 0; + } + } + if (freesize) + return reserve_space(st, raiddisks, size, + *chunk, freesize); + } + return 1; + } + if (st->sb) { + /* creating in a given container */ + return validate_geometry_imsm_volume(st, level, layout, + raiddisks, chunk, size, + data_offset, + dev, freesize, verbose); + } + + /* This device needs to be a device in an 'imsm' container */ + fd = open(dev, O_RDONLY|O_EXCL, 0); + if (fd >= 0) { + if (verbose) + pr_err("Cannot create this array on device %s\n", + dev); + close(fd); + return 0; + } + if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) { + if (verbose) + pr_err("Cannot open %s: %s\n", + dev, strerror(errno)); + return 0; + } + /* Well, it is in use by someone, maybe an 'imsm' container. */ + cfd = open_container(fd); + close(fd); + if (cfd < 0) { + if (verbose) + pr_err("Cannot use %s: It is busy\n", + dev); + return 0; + } + sra = sysfs_read(cfd, NULL, GET_VERSION); + if (sra && sra->array.major_version == -1 && + strcmp(sra->text_version, "imsm") == 0) + is_member = 1; + sysfs_free(sra); + if (is_member) { + /* This is a member of a imsm container. Load the container + * and try to create a volume + */ + struct intel_super *super; + + if (load_super_imsm_all(st, cfd, (void **) &super, NULL, NULL, 1) == 0) { + st->sb = super; + strcpy(st->container_devnm, fd2devnm(cfd)); + close(cfd); + return validate_geometry_imsm_volume(st, level, layout, + raiddisks, chunk, + size, data_offset, dev, + freesize, 1) + ? 1 : -1; + } + } + + if (verbose) + pr_err("failed container membership check\n"); + + close(cfd); + return 0; +} + +static void default_geometry_imsm(struct supertype *st, int *level, int *layout, int *chunk) +{ + struct intel_super *super = st->sb; + + if (level && *level == UnSet) + *level = LEVEL_CONTAINER; + + if (level && layout && *layout == UnSet) + *layout = imsm_level_to_layout(*level); + + if (chunk && (*chunk == UnSet || *chunk == 0)) + *chunk = imsm_default_chunk(super->orom); +} + +static void handle_missing(struct intel_super *super, struct imsm_dev *dev); + +static int kill_subarray_imsm(struct supertype *st) +{ + /* remove the subarray currently referenced by ->current_vol */ + __u8 i; + struct intel_dev **dp; + struct intel_super *super = st->sb; + __u8 current_vol = super->current_vol; + struct imsm_super *mpb = super->anchor; + + if (super->current_vol < 0) + return 2; + super->current_vol = -1; /* invalidate subarray cursor */ + + /* block deletions that would change the uuid of active subarrays + * + * FIXME when immutable ids are available, but note that we'll + * also need to fixup the invalidated/active subarray indexes in + * mdstat + */ + for (i = 0; i < mpb->num_raid_devs; i++) { + char subarray[4]; + + if (i < current_vol) + continue; + sprintf(subarray, "%u", i); + if (is_subarray_active(subarray, st->devnm)) { + pr_err("deleting subarray-%d would change the UUID of active subarray-%d, aborting\n", + current_vol, i); + + return 2; + } + } + + if (st->update_tail) { + struct imsm_update_kill_array *u = xmalloc(sizeof(*u)); + + u->type = update_kill_array; + u->dev_idx = current_vol; + append_metadata_update(st, u, sizeof(*u)); + + return 0; + } + + for (dp = &super->devlist; *dp;) + if ((*dp)->index == current_vol) { + *dp = (*dp)->next; + } else { + handle_missing(super, (*dp)->dev); + if ((*dp)->index > current_vol) + (*dp)->index--; + dp = &(*dp)->next; + } + + /* no more raid devices, all active components are now spares, + * but of course failed are still failed + */ + if (--mpb->num_raid_devs == 0) { + struct dl *d; + + for (d = super->disks; d; d = d->next) + if (d->index > -2) + mark_spare(d); + } + + super->updates_pending++; + + return 0; +} + +static int update_subarray_imsm(struct supertype *st, char *subarray, + char *update, struct mddev_ident *ident) +{ + /* update the subarray currently referenced by ->current_vol */ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + + if (strcmp(update, "name") == 0) { + char *name = ident->name; + char *ep; + int vol; + + if (is_subarray_active(subarray, st->devnm)) { + pr_err("Unable to update name of active subarray\n"); + return 2; + } + + if (!check_name(super, name, 0)) + return 2; + + vol = strtoul(subarray, &ep, 10); + if (*ep != '\0' || vol >= super->anchor->num_raid_devs) + return 2; + + if (st->update_tail) { + struct imsm_update_rename_array *u = xmalloc(sizeof(*u)); + + u->type = update_rename_array; + u->dev_idx = vol; + snprintf((char *) u->name, MAX_RAID_SERIAL_LEN, "%s", name); + append_metadata_update(st, u, sizeof(*u)); + } else { + struct imsm_dev *dev; + int i; + + dev = get_imsm_dev(super, vol); + snprintf((char *) dev->volume, MAX_RAID_SERIAL_LEN, "%s", name); + for (i = 0; i < mpb->num_raid_devs; i++) { + dev = get_imsm_dev(super, i); + handle_missing(super, dev); + } + super->updates_pending++; + } + } else + return 2; + + return 0; +} +#endif /* MDASSEMBLE */ + +static int is_gen_migration(struct imsm_dev *dev) +{ + if (dev == NULL) + return 0; + + if (!dev->vol.migr_state) + return 0; + + if (migr_type(dev) == MIGR_GEN_MIGR) + return 1; + + return 0; +} + +static int is_rebuilding(struct imsm_dev *dev) +{ + struct imsm_map *migr_map; + + if (!dev->vol.migr_state) + return 0; + + if (migr_type(dev) != MIGR_REBUILD) + return 0; + + migr_map = get_imsm_map(dev, MAP_1); + + if (migr_map->map_state == IMSM_T_STATE_DEGRADED) + return 1; + else + return 0; +} + +#ifndef MDASSEMBLE +static int is_initializing(struct imsm_dev *dev) +{ + struct imsm_map *migr_map; + + if (!dev->vol.migr_state) + return 0; + + if (migr_type(dev) != MIGR_INIT) + return 0; + + migr_map = get_imsm_map(dev, MAP_1); + + if (migr_map->map_state == IMSM_T_STATE_UNINITIALIZED) + return 1; + + return 0; +} +#endif + +static void update_recovery_start(struct intel_super *super, + struct imsm_dev *dev, + struct mdinfo *array) +{ + struct mdinfo *rebuild = NULL; + struct mdinfo *d; + __u32 units; + + if (!is_rebuilding(dev)) + return; + + /* Find the rebuild target, but punt on the dual rebuild case */ + for (d = array->devs; d; d = d->next) + if (d->recovery_start == 0) { + if (rebuild) + return; + rebuild = d; + } + + if (!rebuild) { + /* (?) none of the disks are marked with + * IMSM_ORD_REBUILD, so assume they are missing and the + * disk_ord_tbl was not correctly updated + */ + dprintf("%s: failed to locate out-of-sync disk\n", __func__); + return; + } + + units = __le32_to_cpu(dev->vol.curr_migr_unit); + rebuild->recovery_start = units * blocks_per_migr_unit(super, dev); +} + +#ifndef MDASSEMBLE +static int recover_backup_imsm(struct supertype *st, struct mdinfo *info); +#endif + +static struct mdinfo *container_content_imsm(struct supertype *st, char *subarray) +{ + /* Given a container loaded by load_super_imsm_all, + * extract information about all the arrays into + * an mdinfo tree. + * If 'subarray' is given, just extract info about that array. + * + * For each imsm_dev create an mdinfo, fill it in, + * then look for matching devices in super->disks + * and create appropriate device mdinfo. + */ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + struct mdinfo *rest = NULL; + unsigned int i; + int sb_errors = 0; + struct dl *d; + int spare_disks = 0; + + /* do not assemble arrays when not all attributes are supported */ + if (imsm_check_attributes(mpb->attributes) == 0) { + sb_errors = 1; + pr_err("Unsupported attributes in IMSM metadata." + "Arrays activation is blocked.\n"); + } + + /* check for bad blocks */ + if (imsm_bbm_log_size(super->anchor)) { + pr_err("BBM log found in IMSM metadata." + "Arrays activation is blocked.\n"); + sb_errors = 1; + } + + /* count spare devices, not used in maps + */ + for (d = super->disks; d; d = d->next) + if (d->index == -1) + spare_disks++; + + for (i = 0; i < mpb->num_raid_devs; i++) { + struct imsm_dev *dev; + struct imsm_map *map; + struct imsm_map *map2; + struct mdinfo *this; + int slot; +#ifndef MDASSEMBLE + int chunk; +#endif + char *ep; + + if (subarray && + (i != strtoul(subarray, &ep, 10) || *ep != '\0')) + continue; + + dev = get_imsm_dev(super, i); + map = get_imsm_map(dev, MAP_0); + map2 = get_imsm_map(dev, MAP_1); + + /* do not publish arrays that are in the middle of an + * unsupported migration + */ + if (dev->vol.migr_state && + (migr_type(dev) == MIGR_STATE_CHANGE)) { + pr_err("cannot assemble volume '%.16s':" + " unsupported migration in progress\n", + dev->volume); + continue; + } + /* do not publish arrays that are not support by controller's + * OROM/EFI + */ + + this = xmalloc(sizeof(*this)); + + super->current_vol = i; + getinfo_super_imsm_volume(st, this, NULL); + this->next = rest; +#ifndef MDASSEMBLE + chunk = __le16_to_cpu(map->blocks_per_strip) >> 1; + /* mdadm does not support all metadata features- set the bit in all arrays state */ + if (!validate_geometry_imsm_orom(super, + get_imsm_raid_level(map), /* RAID level */ + imsm_level_to_layout(get_imsm_raid_level(map)), + map->num_members, /* raid disks */ + &chunk, join_u32(dev->size_low, dev->size_high), + 1 /* verbose */)) { + pr_err("IMSM RAID geometry validation" + " failed. Array %s activation is blocked.\n", + dev->volume); + this->array.state |= + (1<<MD_SB_BLOCK_CONTAINER_RESHAPE) | + (1<<MD_SB_BLOCK_VOLUME); + } +#endif + + /* if array has bad blocks, set suitable bit in all arrays state */ + if (sb_errors) + this->array.state |= + (1<<MD_SB_BLOCK_CONTAINER_RESHAPE) | + (1<<MD_SB_BLOCK_VOLUME); + + for (slot = 0 ; slot < map->num_members; slot++) { + unsigned long long recovery_start; + struct mdinfo *info_d; + struct dl *d; + int idx; + int skip; + __u32 ord; + + skip = 0; + idx = get_imsm_disk_idx(dev, slot, MAP_0); + ord = get_imsm_ord_tbl_ent(dev, slot, MAP_X); + for (d = super->disks; d ; d = d->next) + if (d->index == idx) + break; + + recovery_start = MaxSector; + if (d == NULL) + skip = 1; + if (d && is_failed(&d->disk)) + skip = 1; + if (ord & IMSM_ORD_REBUILD) + recovery_start = 0; + + /* + * if we skip some disks the array will be assmebled degraded; + * reset resync start to avoid a dirty-degraded + * situation when performing the intial sync + * + * FIXME handle dirty degraded + */ + if ((skip || recovery_start == 0) && !dev->vol.dirty) + this->resync_start = MaxSector; + if (skip) + continue; + + info_d = xcalloc(1, sizeof(*info_d)); + info_d->next = this->devs; + this->devs = info_d; + + info_d->disk.number = d->index; + info_d->disk.major = d->major; + info_d->disk.minor = d->minor; + info_d->disk.raid_disk = slot; + info_d->recovery_start = recovery_start; + if (map2) { + if (slot < map2->num_members) + info_d->disk.state = (1 << MD_DISK_ACTIVE); + else + this->array.spare_disks++; + } else { + if (slot < map->num_members) + info_d->disk.state = (1 << MD_DISK_ACTIVE); + else + this->array.spare_disks++; + } + if (info_d->recovery_start == MaxSector) + this->array.working_disks++; + + info_d->events = __le32_to_cpu(mpb->generation_num); + info_d->data_offset = pba_of_lba0(map); + info_d->component_size = blocks_per_member(map); + } + /* now that the disk list is up-to-date fixup recovery_start */ + update_recovery_start(super, dev, this); + this->array.spare_disks += spare_disks; + +#ifndef MDASSEMBLE + /* check for reshape */ + if (this->reshape_active == 1) + recover_backup_imsm(st, this); +#endif + rest = this; + } + + return rest; +} + +static __u8 imsm_check_degraded(struct intel_super *super, struct imsm_dev *dev, + int failed, int look_in_map) +{ + struct imsm_map *map; + + map = get_imsm_map(dev, look_in_map); + + if (!failed) + return map->map_state == IMSM_T_STATE_UNINITIALIZED ? + IMSM_T_STATE_UNINITIALIZED : IMSM_T_STATE_NORMAL; + + switch (get_imsm_raid_level(map)) { + case 0: + return IMSM_T_STATE_FAILED; + break; + case 1: + if (failed < map->num_members) + return IMSM_T_STATE_DEGRADED; + else + return IMSM_T_STATE_FAILED; + break; + case 10: + { + /** + * check to see if any mirrors have failed, otherwise we + * are degraded. Even numbered slots are mirrored on + * slot+1 + */ + int i; + /* gcc -Os complains that this is unused */ + int insync = insync; + + for (i = 0; i < map->num_members; i++) { + __u32 ord = get_imsm_ord_tbl_ent(dev, i, MAP_X); + int idx = ord_to_idx(ord); + struct imsm_disk *disk; + + /* reset the potential in-sync count on even-numbered + * slots. num_copies is always 2 for imsm raid10 + */ + if ((i & 1) == 0) + insync = 2; + + disk = get_imsm_disk(super, idx); + if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD) + insync--; + + /* no in-sync disks left in this mirror the + * array has failed + */ + if (insync == 0) + return IMSM_T_STATE_FAILED; + } + + return IMSM_T_STATE_DEGRADED; + } + case 5: + if (failed < 2) + return IMSM_T_STATE_DEGRADED; + else + return IMSM_T_STATE_FAILED; + break; + default: + break; + } + + return map->map_state; +} + +static int imsm_count_failed(struct intel_super *super, struct imsm_dev *dev, + int look_in_map) +{ + int i; + int failed = 0; + struct imsm_disk *disk; + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_map *prev = get_imsm_map(dev, MAP_1); + struct imsm_map *map_for_loop; + __u32 ord; + int idx; + int idx_1; + + /* at the beginning of migration we set IMSM_ORD_REBUILD on + * disks that are being rebuilt. New failures are recorded to + * map[0]. So we look through all the disks we started with and + * see if any failures are still present, or if any new ones + * have arrived + */ + map_for_loop = map; + if (prev && (map->num_members < prev->num_members)) + map_for_loop = prev; + + for (i = 0; i < map_for_loop->num_members; i++) { + idx_1 = -255; + /* when MAP_X is passed both maps failures are counted + */ + if (prev && + ((look_in_map == MAP_1) || (look_in_map == MAP_X)) && + (i < prev->num_members)) { + ord = __le32_to_cpu(prev->disk_ord_tbl[i]); + idx_1 = ord_to_idx(ord); + + disk = get_imsm_disk(super, idx_1); + if (!disk || is_failed(disk) || ord & IMSM_ORD_REBUILD) + failed++; + } + if (((look_in_map == MAP_0) || (look_in_map == MAP_X)) && + (i < map->num_members)) { + ord = __le32_to_cpu(map->disk_ord_tbl[i]); + idx = ord_to_idx(ord); + + if (idx != idx_1) { + disk = get_imsm_disk(super, idx); + if (!disk || is_failed(disk) || + ord & IMSM_ORD_REBUILD) + failed++; + } + } + } + + return failed; +} + +#ifndef MDASSEMBLE +static int imsm_open_new(struct supertype *c, struct active_array *a, + char *inst) +{ + struct intel_super *super = c->sb; + struct imsm_super *mpb = super->anchor; + + if (atoi(inst) >= mpb->num_raid_devs) { + pr_err("%s: subarry index %d, out of range\n", + __func__, atoi(inst)); + return -ENODEV; + } + + dprintf("imsm: open_new %s\n", inst); + a->info.container_member = atoi(inst); + return 0; +} + +static int is_resyncing(struct imsm_dev *dev) +{ + struct imsm_map *migr_map; + + if (!dev->vol.migr_state) + return 0; + + if (migr_type(dev) == MIGR_INIT || + migr_type(dev) == MIGR_REPAIR) + return 1; + + if (migr_type(dev) == MIGR_GEN_MIGR) + return 0; + + migr_map = get_imsm_map(dev, MAP_1); + + if ((migr_map->map_state == IMSM_T_STATE_NORMAL) && + (dev->vol.migr_type != MIGR_GEN_MIGR)) + return 1; + else + return 0; +} + +/* return true if we recorded new information */ +static int mark_failure(struct imsm_dev *dev, struct imsm_disk *disk, int idx) +{ + __u32 ord; + int slot; + struct imsm_map *map; + char buf[MAX_RAID_SERIAL_LEN+3]; + unsigned int len, shift = 0; + + /* new failures are always set in map[0] */ + map = get_imsm_map(dev, MAP_0); + + slot = get_imsm_disk_slot(map, idx); + if (slot < 0) + return 0; + + ord = __le32_to_cpu(map->disk_ord_tbl[slot]); + if (is_failed(disk) && (ord & IMSM_ORD_REBUILD)) + return 0; + + memcpy(buf, disk->serial, MAX_RAID_SERIAL_LEN); + buf[MAX_RAID_SERIAL_LEN] = '\000'; + strcat(buf, ":0"); + if ((len = strlen(buf)) >= MAX_RAID_SERIAL_LEN) + shift = len - MAX_RAID_SERIAL_LEN + 1; + strncpy((char *)disk->serial, &buf[shift], MAX_RAID_SERIAL_LEN); + + disk->status |= FAILED_DISK; + set_imsm_ord_tbl_ent(map, slot, idx | IMSM_ORD_REBUILD); + /* mark failures in second map if second map exists and this disk + * in this slot. + * This is valid for migration, initialization and rebuild + */ + if (dev->vol.migr_state) { + struct imsm_map *map2 = get_imsm_map(dev, MAP_1); + int slot2 = get_imsm_disk_slot(map2, idx); + + if ((slot2 < map2->num_members) && + (slot2 >= 0)) + set_imsm_ord_tbl_ent(map2, slot2, + idx | IMSM_ORD_REBUILD); + } + if (map->failed_disk_num == 0xff) + map->failed_disk_num = slot; + return 1; +} + +static void mark_missing(struct imsm_dev *dev, struct imsm_disk *disk, int idx) +{ + mark_failure(dev, disk, idx); + + if (disk->scsi_id == __cpu_to_le32(~(__u32)0)) + return; + + disk->scsi_id = __cpu_to_le32(~(__u32)0); + memmove(&disk->serial[0], &disk->serial[1], MAX_RAID_SERIAL_LEN - 1); +} + +static void handle_missing(struct intel_super *super, struct imsm_dev *dev) +{ + struct dl *dl; + + if (!super->missing) + return; + + /* When orom adds replacement for missing disk it does + * not remove entry of missing disk, but just updates map with + * new added disk. So it is not enough just to test if there is + * any missing disk, we have to look if there are any failed disks + * in map to stop migration */ + + dprintf("imsm: mark missing\n"); + /* end process for initialization and rebuild only + */ + if (is_gen_migration(dev) == 0) { + __u8 map_state; + int failed; + + failed = imsm_count_failed(super, dev, MAP_0); + map_state = imsm_check_degraded(super, dev, failed, MAP_0); + + if (failed) + end_migration(dev, super, map_state); + } + for (dl = super->missing; dl; dl = dl->next) + mark_missing(dev, &dl->disk, dl->index); + super->updates_pending++; +} + +static unsigned long long imsm_set_array_size(struct imsm_dev *dev, + long long new_size) +{ + int used_disks = imsm_num_data_members(dev, MAP_0); + unsigned long long array_blocks; + struct imsm_map *map; + + if (used_disks == 0) { + /* when problems occures + * return current array_blocks value + */ + array_blocks = __le32_to_cpu(dev->size_high); + array_blocks = array_blocks << 32; + array_blocks += __le32_to_cpu(dev->size_low); + + return array_blocks; + } + + /* set array size in metadata + */ + if (new_size <= 0) { + /* OLCE size change is caused by added disks + */ + map = get_imsm_map(dev, MAP_0); + array_blocks = blocks_per_member(map) * used_disks; + } else { + /* Online Volume Size Change + * Using available free space + */ + array_blocks = new_size; + } + + /* round array size down to closest MB + */ + array_blocks = (array_blocks >> SECT_PER_MB_SHIFT) << SECT_PER_MB_SHIFT; + dev->size_low = __cpu_to_le32((__u32)array_blocks); + dev->size_high = __cpu_to_le32((__u32)(array_blocks >> 32)); + + return array_blocks; +} + +static void imsm_set_disk(struct active_array *a, int n, int state); + +static void imsm_progress_container_reshape(struct intel_super *super) +{ + /* if no device has a migr_state, but some device has a + * different number of members than the previous device, start + * changing the number of devices in this device to match + * previous. + */ + struct imsm_super *mpb = super->anchor; + int prev_disks = -1; + int i; + int copy_map_size; + + for (i = 0; i < mpb->num_raid_devs; i++) { + struct imsm_dev *dev = get_imsm_dev(super, i); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_map *map2; + int prev_num_members; + + if (dev->vol.migr_state) + return; + + if (prev_disks == -1) + prev_disks = map->num_members; + if (prev_disks == map->num_members) + continue; + + /* OK, this array needs to enter reshape mode. + * i.e it needs a migr_state + */ + + copy_map_size = sizeof_imsm_map(map); + prev_num_members = map->num_members; + map->num_members = prev_disks; + dev->vol.migr_state = 1; + dev->vol.curr_migr_unit = 0; + set_migr_type(dev, MIGR_GEN_MIGR); + for (i = prev_num_members; + i < map->num_members; i++) + set_imsm_ord_tbl_ent(map, i, i); + map2 = get_imsm_map(dev, MAP_1); + /* Copy the current map */ + memcpy(map2, map, copy_map_size); + map2->num_members = prev_num_members; + + imsm_set_array_size(dev, -1); + super->clean_migration_record_by_mdmon = 1; + super->updates_pending++; + } +} + +/* Handle dirty -> clean transititions, resync and reshape. Degraded and rebuild + * states are handled in imsm_set_disk() with one exception, when a + * resync is stopped due to a new failure this routine will set the + * 'degraded' state for the array. + */ +static int imsm_set_array_state(struct active_array *a, int consistent) +{ + int inst = a->info.container_member; + struct intel_super *super = a->container->sb; + struct imsm_dev *dev = get_imsm_dev(super, inst); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + int failed = imsm_count_failed(super, dev, MAP_0); + __u8 map_state = imsm_check_degraded(super, dev, failed, MAP_0); + __u32 blocks_per_unit; + + if (dev->vol.migr_state && + dev->vol.migr_type == MIGR_GEN_MIGR) { + /* array state change is blocked due to reshape action + * We might need to + * - abort the reshape (if last_checkpoint is 0 and action!= reshape) + * - finish the reshape (if last_checkpoint is big and action != reshape) + * - update curr_migr_unit + */ + if (a->curr_action == reshape) { + /* still reshaping, maybe update curr_migr_unit */ + goto mark_checkpoint; + } else { + if (a->last_checkpoint == 0 && a->prev_action == reshape) { + /* for some reason we aborted the reshape. + * + * disable automatic metadata rollback + * user action is required to recover process + */ + if (0) { + struct imsm_map *map2 = + get_imsm_map(dev, MAP_1); + dev->vol.migr_state = 0; + set_migr_type(dev, 0); + dev->vol.curr_migr_unit = 0; + memcpy(map, map2, + sizeof_imsm_map(map2)); + super->updates_pending++; + } + } + if (a->last_checkpoint >= a->info.component_size) { + unsigned long long array_blocks; + int used_disks; + struct mdinfo *mdi; + + used_disks = imsm_num_data_members(dev, MAP_0); + if (used_disks > 0) { + array_blocks = + blocks_per_member(map) * + used_disks; + /* round array size down to closest MB + */ + array_blocks = (array_blocks + >> SECT_PER_MB_SHIFT) + << SECT_PER_MB_SHIFT; + a->info.custom_array_size = array_blocks; + /* encourage manager to update array + * size + */ + + a->check_reshape = 1; + } + /* finalize online capacity expansion/reshape */ + for (mdi = a->info.devs; mdi; mdi = mdi->next) + imsm_set_disk(a, + mdi->disk.raid_disk, + mdi->curr_state); + + imsm_progress_container_reshape(super); + } + } + } + + /* before we activate this array handle any missing disks */ + if (consistent == 2) + handle_missing(super, dev); + + if (consistent == 2 && + (!is_resync_complete(&a->info) || + map_state != IMSM_T_STATE_NORMAL || + dev->vol.migr_state)) + consistent = 0; + + if (is_resync_complete(&a->info)) { + /* complete intialization / resync, + * recovery and interrupted recovery is completed in + * ->set_disk + */ + if (is_resyncing(dev)) { + dprintf("imsm: mark resync done\n"); + end_migration(dev, super, map_state); + super->updates_pending++; + a->last_checkpoint = 0; + } + } else if ((!is_resyncing(dev) && !failed) && + (imsm_reshape_blocks_arrays_changes(super) == 0)) { + /* mark the start of the init process if nothing is failed */ + dprintf("imsm: mark resync start\n"); + if (map->map_state == IMSM_T_STATE_UNINITIALIZED) + migrate(dev, super, IMSM_T_STATE_NORMAL, MIGR_INIT); + else + migrate(dev, super, IMSM_T_STATE_NORMAL, MIGR_REPAIR); + super->updates_pending++; + } + +mark_checkpoint: + /* skip checkpointing for general migration, + * it is controlled in mdadm + */ + if (is_gen_migration(dev)) + goto skip_mark_checkpoint; + + /* check if we can update curr_migr_unit from resync_start, recovery_start */ + blocks_per_unit = blocks_per_migr_unit(super, dev); + if (blocks_per_unit) { + __u32 units32; + __u64 units; + + units = a->last_checkpoint / blocks_per_unit; + units32 = units; + + /* check that we did not overflow 32-bits, and that + * curr_migr_unit needs updating + */ + if (units32 == units && + units32 != 0 && + __le32_to_cpu(dev->vol.curr_migr_unit) != units32) { + dprintf("imsm: mark checkpoint (%u)\n", units32); + dev->vol.curr_migr_unit = __cpu_to_le32(units32); + super->updates_pending++; + } + } + +skip_mark_checkpoint: + /* mark dirty / clean */ + if (dev->vol.dirty != !consistent) { + dprintf("imsm: mark '%s'\n", consistent ? "clean" : "dirty"); + if (consistent) + dev->vol.dirty = 0; + else + dev->vol.dirty = 1; + super->updates_pending++; + } + + return consistent; +} + +static void imsm_set_disk(struct active_array *a, int n, int state) +{ + int inst = a->info.container_member; + struct intel_super *super = a->container->sb; + struct imsm_dev *dev = get_imsm_dev(super, inst); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_disk *disk; + struct mdinfo *mdi; + int recovery_not_finished = 0; + int failed; + __u32 ord; + __u8 map_state; + + if (n > map->num_members) + pr_err("imsm: set_disk %d out of range 0..%d\n", + n, map->num_members - 1); + + if (n < 0) + return; + + dprintf("imsm: set_disk %d:%x\n", n, state); + + ord = get_imsm_ord_tbl_ent(dev, n, MAP_0); + disk = get_imsm_disk(super, ord_to_idx(ord)); + + /* check for new failures */ + if (state & DS_FAULTY) { + if (mark_failure(dev, disk, ord_to_idx(ord))) + super->updates_pending++; + } + + /* check if in_sync */ + if (state & DS_INSYNC && ord & IMSM_ORD_REBUILD && is_rebuilding(dev)) { + struct imsm_map *migr_map = get_imsm_map(dev, MAP_1); + + set_imsm_ord_tbl_ent(migr_map, n, ord_to_idx(ord)); + super->updates_pending++; + } + + failed = imsm_count_failed(super, dev, MAP_0); + map_state = imsm_check_degraded(super, dev, failed, MAP_0); + + /* check if recovery complete, newly degraded, or failed */ + dprintf("imsm: Detected transition to state "); + switch (map_state) { + case IMSM_T_STATE_NORMAL: /* transition to normal state */ + dprintf("normal: "); + if (is_rebuilding(dev)) { + dprintf("while rebuilding"); + /* check if recovery is really finished */ + for (mdi = a->info.devs; mdi ; mdi = mdi->next) + if (mdi->recovery_start != MaxSector) { + recovery_not_finished = 1; + break; + } + if (recovery_not_finished) { + dprintf("\nimsm: Rebuild has not finished yet, " + "state not changed"); + if (a->last_checkpoint < mdi->recovery_start) { + a->last_checkpoint = mdi->recovery_start; + super->updates_pending++; + } + break; + } + end_migration(dev, super, map_state); + map = get_imsm_map(dev, MAP_0); + map->failed_disk_num = ~0; + super->updates_pending++; + a->last_checkpoint = 0; + break; + } + if (is_gen_migration(dev)) { + dprintf("while general migration"); + if (a->last_checkpoint >= a->info.component_size) + end_migration(dev, super, map_state); + else + map->map_state = map_state; + map = get_imsm_map(dev, MAP_0); + map->failed_disk_num = ~0; + super->updates_pending++; + break; + } + break; + case IMSM_T_STATE_DEGRADED: /* transition to degraded state */ + dprintf("degraded: "); + if ((map->map_state != map_state) && + !dev->vol.migr_state) { + dprintf("mark degraded"); + map->map_state = map_state; + super->updates_pending++; + a->last_checkpoint = 0; + break; + } + if (is_rebuilding(dev)) { + dprintf("while rebuilding."); + if (map->map_state != map_state) { + dprintf(" Map state change"); + end_migration(dev, super, map_state); + super->updates_pending++; + } + break; + } + if (is_gen_migration(dev)) { + dprintf("while general migration"); + if (a->last_checkpoint >= a->info.component_size) + end_migration(dev, super, map_state); + else { + map->map_state = map_state; + manage_second_map(super, dev); + } + super->updates_pending++; + break; + } + if (is_initializing(dev)) { + dprintf("while initialization."); + map->map_state = map_state; + super->updates_pending++; + break; + } + break; + case IMSM_T_STATE_FAILED: /* transition to failed state */ + dprintf("failed: "); + if (is_gen_migration(dev)) { + dprintf("while general migration"); + map->map_state = map_state; + super->updates_pending++; + break; + } + if (map->map_state != map_state) { + dprintf("mark failed"); + end_migration(dev, super, map_state); + super->updates_pending++; + a->last_checkpoint = 0; + break; + } + break; + default: + dprintf("state %i\n", map_state); + } + dprintf("\n"); + +} + +static int store_imsm_mpb(int fd, struct imsm_super *mpb) +{ + void *buf = mpb; + __u32 mpb_size = __le32_to_cpu(mpb->mpb_size); + unsigned long long dsize; + unsigned long long sectors; + + get_dev_size(fd, NULL, &dsize); + + if (mpb_size > 512) { + /* -1 to account for anchor */ + sectors = mpb_sectors(mpb) - 1; + + /* write the extended mpb to the sectors preceeding the anchor */ + if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0) + return 1; + + if ((unsigned long long)write(fd, buf + 512, 512 * sectors) + != 512 * sectors) + return 1; + } + + /* first block is stored on second to last sector of the disk */ + if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) + return 1; + + if (write(fd, buf, 512) != 512) + return 1; + + return 0; +} + +static void imsm_sync_metadata(struct supertype *container) +{ + struct intel_super *super = container->sb; + + dprintf("sync metadata: %d\n", super->updates_pending); + if (!super->updates_pending) + return; + + write_super_imsm(container, 0); + + super->updates_pending = 0; +} + +static struct dl *imsm_readd(struct intel_super *super, int idx, struct active_array *a) +{ + struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member); + int i = get_imsm_disk_idx(dev, idx, MAP_X); + struct dl *dl; + + for (dl = super->disks; dl; dl = dl->next) + if (dl->index == i) + break; + + if (dl && is_failed(&dl->disk)) + dl = NULL; + + if (dl) + dprintf("%s: found %x:%x\n", __func__, dl->major, dl->minor); + + return dl; +} + +static struct dl *imsm_add_spare(struct intel_super *super, int slot, + struct active_array *a, int activate_new, + struct mdinfo *additional_test_list) +{ + struct imsm_dev *dev = get_imsm_dev(super, a->info.container_member); + int idx = get_imsm_disk_idx(dev, slot, MAP_X); + struct imsm_super *mpb = super->anchor; + struct imsm_map *map; + unsigned long long pos; + struct mdinfo *d; + struct extent *ex; + int i, j; + int found; + __u32 array_start = 0; + __u32 array_end = 0; + struct dl *dl; + struct mdinfo *test_list; + + for (dl = super->disks; dl; dl = dl->next) { + /* If in this array, skip */ + for (d = a->info.devs ; d ; d = d->next) + if (d->state_fd >= 0 && + d->disk.major == dl->major && + d->disk.minor == dl->minor) { + dprintf("%x:%x already in array\n", + dl->major, dl->minor); + break; + } + if (d) + continue; + test_list = additional_test_list; + while (test_list) { + if (test_list->disk.major == dl->major && + test_list->disk.minor == dl->minor) { + dprintf("%x:%x already in additional test list\n", + dl->major, dl->minor); + break; + } + test_list = test_list->next; + } + if (test_list) + continue; + + /* skip in use or failed drives */ + if (is_failed(&dl->disk) || idx == dl->index || + dl->index == -2) { + dprintf("%x:%x status (failed: %d index: %d)\n", + dl->major, dl->minor, is_failed(&dl->disk), idx); + continue; + } + + /* skip pure spares when we are looking for partially + * assimilated drives + */ + if (dl->index == -1 && !activate_new) + continue; + + /* Does this unused device have the requisite free space? + * It needs to be able to cover all member volumes + */ + ex = get_extents(super, dl); + if (!ex) { + dprintf("cannot get extents\n"); + continue; + } + for (i = 0; i < mpb->num_raid_devs; i++) { + dev = get_imsm_dev(super, i); + map = get_imsm_map(dev, MAP_0); + + /* check if this disk is already a member of + * this array + */ + if (get_imsm_disk_slot(map, dl->index) >= 0) + continue; + + found = 0; + j = 0; + pos = 0; + array_start = pba_of_lba0(map); + array_end = array_start + + blocks_per_member(map) - 1; + + do { + /* check that we can start at pba_of_lba0 with + * blocks_per_member of space + */ + if (array_start >= pos && array_end < ex[j].start) { + found = 1; + break; + } + pos = ex[j].start + ex[j].size; + j++; + } while (ex[j-1].size); + + if (!found) + break; + } + + free(ex); + if (i < mpb->num_raid_devs) { + dprintf("%x:%x does not have %u to %u available\n", + dl->major, dl->minor, array_start, array_end); + /* No room */ + continue; + } + return dl; + } + + return dl; +} + +static int imsm_rebuild_allowed(struct supertype *cont, int dev_idx, int failed) +{ + struct imsm_dev *dev2; + struct imsm_map *map; + struct dl *idisk; + int slot; + int idx; + __u8 state; + + dev2 = get_imsm_dev(cont->sb, dev_idx); + if (dev2) { + state = imsm_check_degraded(cont->sb, dev2, failed, MAP_0); + if (state == IMSM_T_STATE_FAILED) { + map = get_imsm_map(dev2, MAP_0); + if (!map) + return 1; + for (slot = 0; slot < map->num_members; slot++) { + /* + * Check if failed disks are deleted from intel + * disk list or are marked to be deleted + */ + idx = get_imsm_disk_idx(dev2, slot, MAP_X); + idisk = get_imsm_dl_disk(cont->sb, idx); + /* + * Do not rebuild the array if failed disks + * from failed sub-array are not removed from + * container. + */ + if (idisk && + is_failed(&idisk->disk) && + (idisk->action != DISK_REMOVE)) + return 0; + } + } + } + return 1; +} + +static struct mdinfo *imsm_activate_spare(struct active_array *a, + struct metadata_update **updates) +{ + /** + * Find a device with unused free space and use it to replace a + * failed/vacant region in an array. We replace failed regions one a + * array at a time. The result is that a new spare disk will be added + * to the first failed array and after the monitor has finished + * propagating failures the remainder will be consumed. + * + * FIXME add a capability for mdmon to request spares from another + * container. + */ + + struct intel_super *super = a->container->sb; + int inst = a->info.container_member; + struct imsm_dev *dev = get_imsm_dev(super, inst); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + int failed = a->info.array.raid_disks; + struct mdinfo *rv = NULL; + struct mdinfo *d; + struct mdinfo *di; + struct metadata_update *mu; + struct dl *dl; + struct imsm_update_activate_spare *u; + int num_spares = 0; + int i; + int allowed; + + for (d = a->info.devs ; d ; d = d->next) { + if ((d->curr_state & DS_FAULTY) && + d->state_fd >= 0) + /* wait for Removal to happen */ + return NULL; + if (d->state_fd >= 0) + failed--; + } + + dprintf("imsm: activate spare: inst=%d failed=%d (%d) level=%d\n", + inst, failed, a->info.array.raid_disks, a->info.array.level); + + if (imsm_reshape_blocks_arrays_changes(super)) + return NULL; + + /* Cannot activate another spare if rebuild is in progress already + */ + if (is_rebuilding(dev)) { + dprintf("imsm: No spare activation allowed. " + "Rebuild in progress already.\n"); + return NULL; + } + + if (a->info.array.level == 4) + /* No repair for takeovered array + * imsm doesn't support raid4 + */ + return NULL; + + if (imsm_check_degraded(super, dev, failed, MAP_0) != + IMSM_T_STATE_DEGRADED) + return NULL; + + /* + * If there are any failed disks check state of the other volume. + * Block rebuild if the another one is failed until failed disks + * are removed from container. + */ + if (failed) { + dprintf("found failed disks in %.*s, check if there another" + "failed sub-array.\n", + MAX_RAID_SERIAL_LEN, dev->volume); + /* check if states of the other volumes allow for rebuild */ + for (i = 0; i < super->anchor->num_raid_devs; i++) { + if (i != inst) { + allowed = imsm_rebuild_allowed(a->container, + i, failed); + if (!allowed) + return NULL; + } + } + } + + /* For each slot, if it is not working, find a spare */ + for (i = 0; i < a->info.array.raid_disks; i++) { + for (d = a->info.devs ; d ; d = d->next) + if (d->disk.raid_disk == i) + break; + dprintf("found %d: %p %x\n", i, d, d?d->curr_state:0); + if (d && (d->state_fd >= 0)) + continue; + + /* + * OK, this device needs recovery. Try to re-add the + * previous occupant of this slot, if this fails see if + * we can continue the assimilation of a spare that was + * partially assimilated, finally try to activate a new + * spare. + */ + dl = imsm_readd(super, i, a); + if (!dl) + dl = imsm_add_spare(super, i, a, 0, rv); + if (!dl) + dl = imsm_add_spare(super, i, a, 1, rv); + if (!dl) + continue; + + /* found a usable disk with enough space */ + di = xcalloc(1, sizeof(*di)); + + /* dl->index will be -1 in the case we are activating a + * pristine spare. imsm_process_update() will create a + * new index in this case. Once a disk is found to be + * failed in all member arrays it is kicked from the + * metadata + */ + di->disk.number = dl->index; + + /* (ab)use di->devs to store a pointer to the device + * we chose + */ + di->devs = (struct mdinfo *) dl; + + di->disk.raid_disk = i; + di->disk.major = dl->major; + di->disk.minor = dl->minor; + di->disk.state = 0; + di->recovery_start = 0; + di->data_offset = pba_of_lba0(map); + di->component_size = a->info.component_size; + di->container_member = inst; + super->random = random32(); + di->next = rv; + rv = di; + num_spares++; + dprintf("%x:%x to be %d at %llu\n", dl->major, dl->minor, + i, di->data_offset); + } + + if (!rv) + /* No spares found */ + return rv; + /* Now 'rv' has a list of devices to return. + * Create a metadata_update record to update the + * disk_ord_tbl for the array + */ + mu = xmalloc(sizeof(*mu)); + mu->buf = xcalloc(num_spares, + sizeof(struct imsm_update_activate_spare)); + mu->space = NULL; + mu->space_list = NULL; + mu->len = sizeof(struct imsm_update_activate_spare) * num_spares; + mu->next = *updates; + u = (struct imsm_update_activate_spare *) mu->buf; + + for (di = rv ; di ; di = di->next) { + u->type = update_activate_spare; + u->dl = (struct dl *) di->devs; + di->devs = NULL; + u->slot = di->disk.raid_disk; + u->array = inst; + u->next = u + 1; + u++; + } + (u-1)->next = NULL; + *updates = mu; + + return rv; +} + +static int disks_overlap(struct intel_super *super, int idx, struct imsm_update_create_array *u) +{ + struct imsm_dev *dev = get_imsm_dev(super, idx); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_map *new_map = get_imsm_map(&u->dev, MAP_0); + struct disk_info *inf = get_disk_info(u); + struct imsm_disk *disk; + int i; + int j; + + for (i = 0; i < map->num_members; i++) { + disk = get_imsm_disk(super, get_imsm_disk_idx(dev, i, MAP_X)); + for (j = 0; j < new_map->num_members; j++) + if (serialcmp(disk->serial, inf[j].serial) == 0) + return 1; + } + + return 0; +} + +static struct dl *get_disk_super(struct intel_super *super, int major, int minor) +{ + struct dl *dl = NULL; + for (dl = super->disks; dl; dl = dl->next) + if ((dl->major == major) && (dl->minor == minor)) + return dl; + return NULL; +} + +static int remove_disk_super(struct intel_super *super, int major, int minor) +{ + struct dl *prev = NULL; + struct dl *dl; + + prev = NULL; + for (dl = super->disks; dl; dl = dl->next) { + if ((dl->major == major) && (dl->minor == minor)) { + /* remove */ + if (prev) + prev->next = dl->next; + else + super->disks = dl->next; + dl->next = NULL; + __free_imsm_disk(dl); + dprintf("%s: removed %x:%x\n", + __func__, major, minor); + break; + } + prev = dl; + } + return 0; +} + +static void imsm_delete(struct intel_super *super, struct dl **dlp, unsigned index); + +static int add_remove_disk_update(struct intel_super *super) +{ + int check_degraded = 0; + struct dl *disk = NULL; + /* add/remove some spares to/from the metadata/contrainer */ + while (super->disk_mgmt_list) { + struct dl *disk_cfg; + + disk_cfg = super->disk_mgmt_list; + super->disk_mgmt_list = disk_cfg->next; + disk_cfg->next = NULL; + + if (disk_cfg->action == DISK_ADD) { + disk_cfg->next = super->disks; + super->disks = disk_cfg; + check_degraded = 1; + dprintf("%s: added %x:%x\n", + __func__, disk_cfg->major, + disk_cfg->minor); + } else if (disk_cfg->action == DISK_REMOVE) { + dprintf("Disk remove action processed: %x.%x\n", + disk_cfg->major, disk_cfg->minor); + disk = get_disk_super(super, + disk_cfg->major, + disk_cfg->minor); + if (disk) { + /* store action status */ + disk->action = DISK_REMOVE; + /* remove spare disks only */ + if (disk->index == -1) { + remove_disk_super(super, + disk_cfg->major, + disk_cfg->minor); + } + } + /* release allocate disk structure */ + __free_imsm_disk(disk_cfg); + } + } + return check_degraded; +} + +static int apply_reshape_migration_update(struct imsm_update_reshape_migration *u, + struct intel_super *super, + void ***space_list) +{ + struct intel_dev *id; + void **tofree = NULL; + int ret_val = 0; + + dprintf("apply_reshape_migration_update()\n"); + if ((u->subdev < 0) || + (u->subdev > 1)) { + dprintf("imsm: Error: Wrong subdev: %i\n", u->subdev); + return ret_val; + } + if ((space_list == NULL) || (*space_list == NULL)) { + dprintf("imsm: Error: Memory is not allocated\n"); + return ret_val; + } + + for (id = super->devlist ; id; id = id->next) { + if (id->index == (unsigned)u->subdev) { + struct imsm_dev *dev = get_imsm_dev(super, u->subdev); + struct imsm_map *map; + struct imsm_dev *new_dev = + (struct imsm_dev *)*space_list; + struct imsm_map *migr_map = get_imsm_map(dev, MAP_1); + int to_state; + struct dl *new_disk; + + if (new_dev == NULL) + return ret_val; + *space_list = **space_list; + memcpy(new_dev, dev, sizeof_imsm_dev(dev, 0)); + map = get_imsm_map(new_dev, MAP_0); + if (migr_map) { + dprintf("imsm: Error: migration in progress"); + return ret_val; + } + + to_state = map->map_state; + if ((u->new_level == 5) && (map->raid_level == 0)) { + map->num_members++; + /* this should not happen */ + if (u->new_disks[0] < 0) { + map->failed_disk_num = + map->num_members - 1; + to_state = IMSM_T_STATE_DEGRADED; + } else + to_state = IMSM_T_STATE_NORMAL; + } + migrate(new_dev, super, to_state, MIGR_GEN_MIGR); + if (u->new_level > -1) + map->raid_level = u->new_level; + migr_map = get_imsm_map(new_dev, MAP_1); + if ((u->new_level == 5) && + (migr_map->raid_level == 0)) { + int ord = map->num_members - 1; + migr_map->num_members--; + if (u->new_disks[0] < 0) + ord |= IMSM_ORD_REBUILD; + set_imsm_ord_tbl_ent(map, + map->num_members - 1, + ord); + } + id->dev = new_dev; + tofree = (void **)dev; + + /* update chunk size + */ + if (u->new_chunksize > 0) + map->blocks_per_strip = + __cpu_to_le16(u->new_chunksize * 2); + + /* add disk + */ + if ((u->new_level != 5) || + (migr_map->raid_level != 0) || + (migr_map->raid_level == map->raid_level)) + goto skip_disk_add; + + if (u->new_disks[0] >= 0) { + /* use passes spare + */ + new_disk = get_disk_super(super, + major(u->new_disks[0]), + minor(u->new_disks[0])); + dprintf("imsm: new disk for reshape is: %i:%i " + "(%p, index = %i)\n", + major(u->new_disks[0]), + minor(u->new_disks[0]), + new_disk, new_disk->index); + if (new_disk == NULL) + goto error_disk_add; + + new_disk->index = map->num_members - 1; + /* slot to fill in autolayout + */ + new_disk->raiddisk = new_disk->index; + new_disk->disk.status |= CONFIGURED_DISK; + new_disk->disk.status &= ~SPARE_DISK; + } else + goto error_disk_add; + +skip_disk_add: + *tofree = *space_list; + /* calculate new size + */ + imsm_set_array_size(new_dev, -1); + + ret_val = 1; + } + } + + if (tofree) + *space_list = tofree; + return ret_val; + +error_disk_add: + dprintf("Error: imsm: Cannot find disk.\n"); + return ret_val; +} + +static int apply_size_change_update(struct imsm_update_size_change *u, + struct intel_super *super) +{ + struct intel_dev *id; + int ret_val = 0; + + dprintf("apply_size_change_update()\n"); + if ((u->subdev < 0) || + (u->subdev > 1)) { + dprintf("imsm: Error: Wrong subdev: %i\n", u->subdev); + return ret_val; + } + + for (id = super->devlist ; id; id = id->next) { + if (id->index == (unsigned)u->subdev) { + struct imsm_dev *dev = get_imsm_dev(super, u->subdev); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + int used_disks = imsm_num_data_members(dev, MAP_0); + unsigned long long blocks_per_member; + + /* calculate new size + */ + blocks_per_member = u->new_size / used_disks; + dprintf("imsm: apply_size_change_update(size: %llu, " + "blocks per member: %llu)\n", + u->new_size, blocks_per_member); + set_blocks_per_member(map, blocks_per_member); + imsm_set_array_size(dev, u->new_size); + + ret_val = 1; + break; + } + } + + return ret_val; +} + +static int apply_update_activate_spare(struct imsm_update_activate_spare *u, + struct intel_super *super, + struct active_array *active_array) +{ + struct imsm_super *mpb = super->anchor; + struct imsm_dev *dev = get_imsm_dev(super, u->array); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct imsm_map *migr_map; + struct active_array *a; + struct imsm_disk *disk; + __u8 to_state; + struct dl *dl; + unsigned int found; + int failed; + int victim; + int i; + int second_map_created = 0; + + for (; u; u = u->next) { + victim = get_imsm_disk_idx(dev, u->slot, MAP_X); + + if (victim < 0) + return 0; + + for (dl = super->disks; dl; dl = dl->next) + if (dl == u->dl) + break; + + if (!dl) { + pr_err("error: imsm_activate_spare passed " + "an unknown disk (index: %d)\n", + u->dl->index); + return 0; + } + + /* count failures (excluding rebuilds and the victim) + * to determine map[0] state + */ + failed = 0; + for (i = 0; i < map->num_members; i++) { + if (i == u->slot) + continue; + disk = get_imsm_disk(super, + get_imsm_disk_idx(dev, i, MAP_X)); + if (!disk || is_failed(disk)) + failed++; + } + + /* adding a pristine spare, assign a new index */ + if (dl->index < 0) { + dl->index = super->anchor->num_disks; + super->anchor->num_disks++; + } + disk = &dl->disk; + disk->status |= CONFIGURED_DISK; + disk->status &= ~SPARE_DISK; + + /* mark rebuild */ + to_state = imsm_check_degraded(super, dev, failed, MAP_0); + if (!second_map_created) { + second_map_created = 1; + map->map_state = IMSM_T_STATE_DEGRADED; + migrate(dev, super, to_state, MIGR_REBUILD); + } else + map->map_state = to_state; + migr_map = get_imsm_map(dev, MAP_1); + set_imsm_ord_tbl_ent(map, u->slot, dl->index); + set_imsm_ord_tbl_ent(migr_map, u->slot, + dl->index | IMSM_ORD_REBUILD); + + /* update the family_num to mark a new container + * generation, being careful to record the existing + * family_num in orig_family_num to clean up after + * earlier mdadm versions that neglected to set it. + */ + if (mpb->orig_family_num == 0) + mpb->orig_family_num = mpb->family_num; + mpb->family_num += super->random; + + /* count arrays using the victim in the metadata */ + found = 0; + for (a = active_array; a ; a = a->next) { + dev = get_imsm_dev(super, a->info.container_member); + map = get_imsm_map(dev, MAP_0); + + if (get_imsm_disk_slot(map, victim) >= 0) + found++; + } + + /* delete the victim if it is no longer being + * utilized anywhere + */ + if (!found) { + struct dl **dlp; + + /* We know that 'manager' isn't touching anything, + * so it is safe to delete + */ + for (dlp = &super->disks; *dlp; dlp = &(*dlp)->next) + if ((*dlp)->index == victim) + break; + + /* victim may be on the missing list */ + if (!*dlp) + for (dlp = &super->missing; *dlp; + dlp = &(*dlp)->next) + if ((*dlp)->index == victim) + break; + imsm_delete(super, dlp, victim); + } + } + + return 1; +} + +static int apply_reshape_container_disks_update(struct imsm_update_reshape *u, + struct intel_super *super, + void ***space_list) +{ + struct dl *new_disk; + struct intel_dev *id; + int i; + int delta_disks = u->new_raid_disks - u->old_raid_disks; + int disk_count = u->old_raid_disks; + void **tofree = NULL; + int devices_to_reshape = 1; + struct imsm_super *mpb = super->anchor; + int ret_val = 0; + unsigned int dev_id; + + dprintf("imsm: apply_reshape_container_disks_update()\n"); + + /* enable spares to use in array */ + for (i = 0; i < delta_disks; i++) { + new_disk = get_disk_super(super, + major(u->new_disks[i]), + minor(u->new_disks[i])); + dprintf("imsm: new disk for reshape is: %i:%i " + "(%p, index = %i)\n", + major(u->new_disks[i]), minor(u->new_disks[i]), + new_disk, new_disk->index); + if ((new_disk == NULL) || + ((new_disk->index >= 0) && + (new_disk->index < u->old_raid_disks))) + goto update_reshape_exit; + new_disk->index = disk_count++; + /* slot to fill in autolayout + */ + new_disk->raiddisk = new_disk->index; + new_disk->disk.status |= + CONFIGURED_DISK; + new_disk->disk.status &= ~SPARE_DISK; + } + + dprintf("imsm: volume set mpb->num_raid_devs = %i\n", + mpb->num_raid_devs); + /* manage changes in volume + */ + for (dev_id = 0; dev_id < mpb->num_raid_devs; dev_id++) { + void **sp = *space_list; + struct imsm_dev *newdev; + struct imsm_map *newmap, *oldmap; + + for (id = super->devlist ; id; id = id->next) { + if (id->index == dev_id) + break; + } + if (id == NULL) + break; + if (!sp) + continue; + *space_list = *sp; + newdev = (void*)sp; + /* Copy the dev, but not (all of) the map */ + memcpy(newdev, id->dev, sizeof(*newdev)); + oldmap = get_imsm_map(id->dev, MAP_0); + newmap = get_imsm_map(newdev, MAP_0); + /* Copy the current map */ + memcpy(newmap, oldmap, sizeof_imsm_map(oldmap)); + /* update one device only + */ + if (devices_to_reshape) { + dprintf("imsm: modifying subdev: %i\n", + id->index); + devices_to_reshape--; + newdev->vol.migr_state = 1; + newdev->vol.curr_migr_unit = 0; + set_migr_type(newdev, MIGR_GEN_MIGR); + newmap->num_members = u->new_raid_disks; + for (i = 0; i < delta_disks; i++) { + set_imsm_ord_tbl_ent(newmap, + u->old_raid_disks + i, + u->old_raid_disks + i); + } + /* New map is correct, now need to save old map + */ + newmap = get_imsm_map(newdev, MAP_1); + memcpy(newmap, oldmap, sizeof_imsm_map(oldmap)); + + imsm_set_array_size(newdev, -1); + } + + sp = (void **)id->dev; + id->dev = newdev; + *sp = tofree; + tofree = sp; + + /* Clear migration record */ + memset(super->migr_rec, 0, sizeof(struct migr_record)); + } + if (tofree) + *space_list = tofree; + ret_val = 1; + +update_reshape_exit: + + return ret_val; +} + +static int apply_takeover_update(struct imsm_update_takeover *u, + struct intel_super *super, + void ***space_list) +{ + struct imsm_dev *dev = NULL; + struct intel_dev *dv; + struct imsm_dev *dev_new; + struct imsm_map *map; + struct dl *dm, *du; + int i; + + for (dv = super->devlist; dv; dv = dv->next) + if (dv->index == (unsigned int)u->subarray) { + dev = dv->dev; + break; + } + + if (dev == NULL) + return 0; + + map = get_imsm_map(dev, MAP_0); + + if (u->direction == R10_TO_R0) { + /* Number of failed disks must be half of initial disk number */ + if (imsm_count_failed(super, dev, MAP_0) != + (map->num_members / 2)) + return 0; + + /* iterate through devices to mark removed disks as spare */ + for (dm = super->disks; dm; dm = dm->next) { + if (dm->disk.status & FAILED_DISK) { + int idx = dm->index; + /* update indexes on the disk list */ +/* FIXME this loop-with-the-loop looks wrong, I'm not convinced + the index values will end up being correct.... NB */ + for (du = super->disks; du; du = du->next) + if (du->index > idx) + du->index--; + /* mark as spare disk */ + mark_spare(dm); + } + } + /* update map */ + map->num_members = map->num_members / 2; + map->map_state = IMSM_T_STATE_NORMAL; + map->num_domains = 1; + map->raid_level = 0; + map->failed_disk_num = -1; + } + + if (u->direction == R0_TO_R10) { + void **space; + /* update slots in current disk list */ + for (dm = super->disks; dm; dm = dm->next) { + if (dm->index >= 0) + dm->index *= 2; + } + /* create new *missing* disks */ + for (i = 0; i < map->num_members; i++) { + space = *space_list; + if (!space) + continue; + *space_list = *space; + du = (void *)space; + memcpy(du, super->disks, sizeof(*du)); + du->fd = -1; + du->minor = 0; + du->major = 0; + du->index = (i * 2) + 1; + sprintf((char *)du->disk.serial, + " MISSING_%d", du->index); + sprintf((char *)du->serial, + "MISSING_%d", du->index); + du->next = super->missing; + super->missing = du; + } + /* create new dev and map */ + space = *space_list; + if (!space) + return 0; + *space_list = *space; + dev_new = (void *)space; + memcpy(dev_new, dev, sizeof(*dev)); + /* update new map */ + map = get_imsm_map(dev_new, MAP_0); + map->num_members = map->num_members * 2; + map->map_state = IMSM_T_STATE_DEGRADED; + map->num_domains = 2; + map->raid_level = 1; + /* replace dev<->dev_new */ + dv->dev = dev_new; + } + /* update disk order table */ + for (du = super->disks; du; du = du->next) + if (du->index >= 0) + set_imsm_ord_tbl_ent(map, du->index, du->index); + for (du = super->missing; du; du = du->next) + if (du->index >= 0) { + set_imsm_ord_tbl_ent(map, du->index, du->index); + mark_missing(dv->dev, &du->disk, du->index); + } + + return 1; +} + +static void imsm_process_update(struct supertype *st, + struct metadata_update *update) +{ + /** + * crack open the metadata_update envelope to find the update record + * update can be one of: + * update_reshape_container_disks - all the arrays in the container + * are being reshaped to have more devices. We need to mark + * the arrays for general migration and convert selected spares + * into active devices. + * update_activate_spare - a spare device has replaced a failed + * device in an array, update the disk_ord_tbl. If this disk is + * present in all member arrays then also clear the SPARE_DISK + * flag + * update_create_array + * update_kill_array + * update_rename_array + * update_add_remove_disk + */ + struct intel_super *super = st->sb; + struct imsm_super *mpb; + enum imsm_update_type type = *(enum imsm_update_type *) update->buf; + + /* update requires a larger buf but the allocation failed */ + if (super->next_len && !super->next_buf) { + super->next_len = 0; + return; + } + + if (super->next_buf) { + memcpy(super->next_buf, super->buf, super->len); + free(super->buf); + super->len = super->next_len; + super->buf = super->next_buf; + + super->next_len = 0; + super->next_buf = NULL; + } + + mpb = super->anchor; + + switch (type) { + case update_general_migration_checkpoint: { + struct intel_dev *id; + struct imsm_update_general_migration_checkpoint *u = + (void *)update->buf; + + dprintf("imsm: process_update() " + "for update_general_migration_checkpoint called\n"); + + /* find device under general migration */ + for (id = super->devlist ; id; id = id->next) { + if (is_gen_migration(id->dev)) { + id->dev->vol.curr_migr_unit = + __cpu_to_le32(u->curr_migr_unit); + super->updates_pending++; + } + } + break; + } + case update_takeover: { + struct imsm_update_takeover *u = (void *)update->buf; + if (apply_takeover_update(u, super, &update->space_list)) { + imsm_update_version_info(super); + super->updates_pending++; + } + break; + } + + case update_reshape_container_disks: { + struct imsm_update_reshape *u = (void *)update->buf; + if (apply_reshape_container_disks_update( + u, super, &update->space_list)) + super->updates_pending++; + break; + } + case update_reshape_migration: { + struct imsm_update_reshape_migration *u = (void *)update->buf; + if (apply_reshape_migration_update( + u, super, &update->space_list)) + super->updates_pending++; + break; + } + case update_size_change: { + struct imsm_update_size_change *u = (void *)update->buf; + if (apply_size_change_update(u, super)) + super->updates_pending++; + break; + } + case update_activate_spare: { + struct imsm_update_activate_spare *u = (void *) update->buf; + if (apply_update_activate_spare(u, super, st->arrays)) + super->updates_pending++; + break; + } + case update_create_array: { + /* someone wants to create a new array, we need to be aware of + * a few races/collisions: + * 1/ 'Create' called by two separate instances of mdadm + * 2/ 'Create' versus 'activate_spare': mdadm has chosen + * devices that have since been assimilated via + * activate_spare. + * In the event this update can not be carried out mdadm will + * (FIX ME) notice that its update did not take hold. + */ + struct imsm_update_create_array *u = (void *) update->buf; + struct intel_dev *dv; + struct imsm_dev *dev; + struct imsm_map *map, *new_map; + unsigned long long start, end; + unsigned long long new_start, new_end; + int i; + struct disk_info *inf; + struct dl *dl; + + /* handle racing creates: first come first serve */ + if (u->dev_idx < mpb->num_raid_devs) { + dprintf("%s: subarray %d already defined\n", + __func__, u->dev_idx); + goto create_error; + } + + /* check update is next in sequence */ + if (u->dev_idx != mpb->num_raid_devs) { + dprintf("%s: can not create array %d expected index %d\n", + __func__, u->dev_idx, mpb->num_raid_devs); + goto create_error; + } + + new_map = get_imsm_map(&u->dev, MAP_0); + new_start = pba_of_lba0(new_map); + new_end = new_start + blocks_per_member(new_map); + inf = get_disk_info(u); + + /* handle activate_spare versus create race: + * check to make sure that overlapping arrays do not include + * overalpping disks + */ + for (i = 0; i < mpb->num_raid_devs; i++) { + dev = get_imsm_dev(super, i); + map = get_imsm_map(dev, MAP_0); + start = pba_of_lba0(map); + end = start + blocks_per_member(map); + if ((new_start >= start && new_start <= end) || + (start >= new_start && start <= new_end)) + /* overlap */; + else + continue; + + if (disks_overlap(super, i, u)) { + dprintf("%s: arrays overlap\n", __func__); + goto create_error; + } + } + + /* check that prepare update was successful */ + if (!update->space) { + dprintf("%s: prepare update failed\n", __func__); + goto create_error; + } + + /* check that all disks are still active before committing + * changes. FIXME: could we instead handle this by creating a + * degraded array? That's probably not what the user expects, + * so better to drop this update on the floor. + */ + for (i = 0; i < new_map->num_members; i++) { + dl = serial_to_dl(inf[i].serial, super); + if (!dl) { + dprintf("%s: disk disappeared\n", __func__); + goto create_error; + } + } + + super->updates_pending++; + + /* convert spares to members and fixup ord_tbl */ + for (i = 0; i < new_map->num_members; i++) { + dl = serial_to_dl(inf[i].serial, super); + if (dl->index == -1) { + dl->index = mpb->num_disks; + mpb->num_disks++; + dl->disk.status |= CONFIGURED_DISK; + dl->disk.status &= ~SPARE_DISK; + } + set_imsm_ord_tbl_ent(new_map, i, dl->index); + } + + dv = update->space; + dev = dv->dev; + update->space = NULL; + imsm_copy_dev(dev, &u->dev); + dv->index = u->dev_idx; + dv->next = super->devlist; + super->devlist = dv; + mpb->num_raid_devs++; + + imsm_update_version_info(super); + break; + create_error: + /* mdmon knows how to release update->space, but not + * ((struct intel_dev *) update->space)->dev + */ + if (update->space) { + dv = update->space; + free(dv->dev); + } + break; + } + case update_kill_array: { + struct imsm_update_kill_array *u = (void *) update->buf; + int victim = u->dev_idx; + struct active_array *a; + struct intel_dev **dp; + struct imsm_dev *dev; + + /* sanity check that we are not affecting the uuid of + * active arrays, or deleting an active array + * + * FIXME when immutable ids are available, but note that + * we'll also need to fixup the invalidated/active + * subarray indexes in mdstat + */ + for (a = st->arrays; a; a = a->next) + if (a->info.container_member >= victim) + break; + /* by definition if mdmon is running at least one array + * is active in the container, so checking + * mpb->num_raid_devs is just extra paranoia + */ + dev = get_imsm_dev(super, victim); + if (a || !dev || mpb->num_raid_devs == 1) { + dprintf("failed to delete subarray-%d\n", victim); + break; + } + + for (dp = &super->devlist; *dp;) + if ((*dp)->index == (unsigned)super->current_vol) { + *dp = (*dp)->next; + } else { + if ((*dp)->index > (unsigned)victim) + (*dp)->index--; + dp = &(*dp)->next; + } + mpb->num_raid_devs--; + super->updates_pending++; + break; + } + case update_rename_array: { + struct imsm_update_rename_array *u = (void *) update->buf; + char name[MAX_RAID_SERIAL_LEN+1]; + int target = u->dev_idx; + struct active_array *a; + struct imsm_dev *dev; + + /* sanity check that we are not affecting the uuid of + * an active array + */ + snprintf(name, MAX_RAID_SERIAL_LEN, "%s", (char *) u->name); + name[MAX_RAID_SERIAL_LEN] = '\0'; + for (a = st->arrays; a; a = a->next) + if (a->info.container_member == target) + break; + dev = get_imsm_dev(super, u->dev_idx); + if (a || !dev || !check_name(super, name, 1)) { + dprintf("failed to rename subarray-%d\n", target); + break; + } + + snprintf((char *) dev->volume, MAX_RAID_SERIAL_LEN, "%s", name); + super->updates_pending++; + break; + } + case update_add_remove_disk: { + /* we may be able to repair some arrays if disks are + * being added, check the status of add_remove_disk + * if discs has been added. + */ + if (add_remove_disk_update(super)) { + struct active_array *a; + + super->updates_pending++; + for (a = st->arrays; a; a = a->next) + a->check_degraded = 1; + } + break; + } + default: + pr_err("error: unsuported process update type:" + "(type: %d)\n", type); + } +} + +static struct mdinfo *get_spares_for_grow(struct supertype *st); + +static int imsm_prepare_update(struct supertype *st, + struct metadata_update *update) +{ + /** + * Allocate space to hold new disk entries, raid-device entries or a new + * mpb if necessary. The manager synchronously waits for updates to + * complete in the monitor, so new mpb buffers allocated here can be + * integrated by the monitor thread without worrying about live pointers + * in the manager thread. + */ + enum imsm_update_type type; + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + size_t buf_len; + size_t len = 0; + + if (update->len < (int)sizeof(type)) + return 0; + + type = *(enum imsm_update_type *) update->buf; + + switch (type) { + case update_general_migration_checkpoint: + if (update->len < (int)sizeof(struct imsm_update_general_migration_checkpoint)) + return 0; + dprintf("imsm: prepare_update() " + "for update_general_migration_checkpoint called\n"); + break; + case update_takeover: { + struct imsm_update_takeover *u = (void *)update->buf; + if (update->len < (int)sizeof(*u)) + return 0; + if (u->direction == R0_TO_R10) { + void **tail = (void **)&update->space_list; + struct imsm_dev *dev = get_imsm_dev(super, u->subarray); + struct imsm_map *map = get_imsm_map(dev, MAP_0); + int num_members = map->num_members; + void *space; + int size, i; + /* allocate memory for added disks */ + for (i = 0; i < num_members; i++) { + size = sizeof(struct dl); + space = xmalloc(size); + *tail = space; + tail = space; + *tail = NULL; + } + /* allocate memory for new device */ + size = sizeof_imsm_dev(super->devlist->dev, 0) + + (num_members * sizeof(__u32)); + space = xmalloc(size); + *tail = space; + tail = space; + *tail = NULL; + len = disks_to_mpb_size(num_members * 2); + } + + break; + } + case update_reshape_container_disks: { + /* Every raid device in the container is about to + * gain some more devices, and we will enter a + * reconfiguration. + * So each 'imsm_map' will be bigger, and the imsm_vol + * will now hold 2 of them. + * Thus we need new 'struct imsm_dev' allocations sized + * as sizeof_imsm_dev but with more devices in both maps. + */ + struct imsm_update_reshape *u = (void *)update->buf; + struct intel_dev *dl; + void **space_tail = (void**)&update->space_list; + + if (update->len < (int)sizeof(*u)) + return 0; + + dprintf("imsm: imsm_prepare_update() for update_reshape\n"); + + for (dl = super->devlist; dl; dl = dl->next) { + int size = sizeof_imsm_dev(dl->dev, 1); + void *s; + if (u->new_raid_disks > u->old_raid_disks) + size += sizeof(__u32)*2* + (u->new_raid_disks - u->old_raid_disks); + s = xmalloc(size); + *space_tail = s; + space_tail = s; + *space_tail = NULL; + } + + len = disks_to_mpb_size(u->new_raid_disks); + dprintf("New anchor length is %llu\n", (unsigned long long)len); + break; + } + case update_reshape_migration: { + /* for migration level 0->5 we need to add disks + * so the same as for container operation we will copy + * device to the bigger location. + * in memory prepared device and new disk area are prepared + * for usage in process update + */ + struct imsm_update_reshape_migration *u = (void *)update->buf; + struct intel_dev *id; + void **space_tail = (void **)&update->space_list; + int size; + void *s; + int current_level = -1; + + if (update->len < (int)sizeof(*u)) + return 0; + + dprintf("imsm: imsm_prepare_update() for update_reshape\n"); + + /* add space for bigger array in update + */ + for (id = super->devlist; id; id = id->next) { + if (id->index == (unsigned)u->subdev) { + size = sizeof_imsm_dev(id->dev, 1); + if (u->new_raid_disks > u->old_raid_disks) + size += sizeof(__u32)*2* + (u->new_raid_disks - u->old_raid_disks); + s = xmalloc(size); + *space_tail = s; + space_tail = s; + *space_tail = NULL; + break; + } + } + if (update->space_list == NULL) + break; + + /* add space for disk in update + */ + size = sizeof(struct dl); + s = xmalloc(size); + *space_tail = s; + space_tail = s; + *space_tail = NULL; + + /* add spare device to update + */ + for (id = super->devlist ; id; id = id->next) + if (id->index == (unsigned)u->subdev) { + struct imsm_dev *dev; + struct imsm_map *map; + + dev = get_imsm_dev(super, u->subdev); + map = get_imsm_map(dev, MAP_0); + current_level = map->raid_level; + break; + } + if ((u->new_level == 5) && (u->new_level != current_level)) { + struct mdinfo *spares; + + spares = get_spares_for_grow(st); + if (spares) { + struct dl *dl; + struct mdinfo *dev; + + dev = spares->devs; + if (dev) { + u->new_disks[0] = + makedev(dev->disk.major, + dev->disk.minor); + dl = get_disk_super(super, + dev->disk.major, + dev->disk.minor); + dl->index = u->old_raid_disks; + dev = dev->next; + } + sysfs_free(spares); + } + } + len = disks_to_mpb_size(u->new_raid_disks); + dprintf("New anchor length is %llu\n", (unsigned long long)len); + break; + } + case update_size_change: { + if (update->len < (int)sizeof(struct imsm_update_size_change)) + return 0; + break; + } + case update_activate_spare: { + if (update->len < (int)sizeof(struct imsm_update_activate_spare)) + return 0; + break; + } + case update_create_array: { + struct imsm_update_create_array *u = (void *) update->buf; + struct intel_dev *dv; + struct imsm_dev *dev = &u->dev; + struct imsm_map *map = get_imsm_map(dev, MAP_0); + struct dl *dl; + struct disk_info *inf; + int i; + int activate = 0; + + if (update->len < (int)sizeof(*u)) + return 0; + + inf = get_disk_info(u); + len = sizeof_imsm_dev(dev, 1); + /* allocate a new super->devlist entry */ + dv = xmalloc(sizeof(*dv)); + dv->dev = xmalloc(len); + update->space = dv; + + /* count how many spares will be converted to members */ + for (i = 0; i < map->num_members; i++) { + dl = serial_to_dl(inf[i].serial, super); + if (!dl) { + /* hmm maybe it failed?, nothing we can do about + * it here + */ + continue; + } + if (count_memberships(dl, super) == 0) + activate++; + } + len += activate * sizeof(struct imsm_disk); + break; + } + case update_kill_array: { + if (update->len < (int)sizeof(struct imsm_update_kill_array)) + return 0; + break; + } + case update_rename_array: { + if (update->len < (int)sizeof(struct imsm_update_rename_array)) + return 0; + break; + } + case update_add_remove_disk: + /* no update->len needed */ + break; + default: + return 0; + } + + /* check if we need a larger metadata buffer */ + if (super->next_buf) + buf_len = super->next_len; + else + buf_len = super->len; + + if (__le32_to_cpu(mpb->mpb_size) + len > buf_len) { + /* ok we need a larger buf than what is currently allocated + * if this allocation fails process_update will notice that + * ->next_len is set and ->next_buf is NULL + */ + buf_len = ROUND_UP(__le32_to_cpu(mpb->mpb_size) + len, 512); + if (super->next_buf) + free(super->next_buf); + + super->next_len = buf_len; + if (posix_memalign(&super->next_buf, 512, buf_len) == 0) + memset(super->next_buf, 0, buf_len); + else + super->next_buf = NULL; + } + return 1; +} + +/* must be called while manager is quiesced */ +static void imsm_delete(struct intel_super *super, struct dl **dlp, unsigned index) +{ + struct imsm_super *mpb = super->anchor; + struct dl *iter; + struct imsm_dev *dev; + struct imsm_map *map; + int i, j, num_members; + __u32 ord; + + dprintf("%s: deleting device[%d] from imsm_super\n", + __func__, index); + + /* shift all indexes down one */ + for (iter = super->disks; iter; iter = iter->next) + if (iter->index > (int)index) + iter->index--; + for (iter = super->missing; iter; iter = iter->next) + if (iter->index > (int)index) + iter->index--; + + for (i = 0; i < mpb->num_raid_devs; i++) { + dev = get_imsm_dev(super, i); + map = get_imsm_map(dev, MAP_0); + num_members = map->num_members; + for (j = 0; j < num_members; j++) { + /* update ord entries being careful not to propagate + * ord-flags to the first map + */ + ord = get_imsm_ord_tbl_ent(dev, j, MAP_X); + + if (ord_to_idx(ord) <= index) + continue; + + map = get_imsm_map(dev, MAP_0); + set_imsm_ord_tbl_ent(map, j, ord_to_idx(ord - 1)); + map = get_imsm_map(dev, MAP_1); + if (map) + set_imsm_ord_tbl_ent(map, j, ord - 1); + } + } + + mpb->num_disks--; + super->updates_pending++; + if (*dlp) { + struct dl *dl = *dlp; + + *dlp = (*dlp)->next; + __free_imsm_disk(dl); + } +} +#endif /* MDASSEMBLE */ + +static void close_targets(int *targets, int new_disks) +{ + int i; + + if (!targets) + return; + + for (i = 0; i < new_disks; i++) { + if (targets[i] >= 0) { + close(targets[i]); + targets[i] = -1; + } + } +} + +static int imsm_get_allowed_degradation(int level, int raid_disks, + struct intel_super *super, + struct imsm_dev *dev) +{ + switch (level) { + case 1: + case 10:{ + int ret_val = 0; + struct imsm_map *map; + int i; + + ret_val = raid_disks/2; + /* check map if all disks pairs not failed + * in both maps + */ + map = get_imsm_map(dev, MAP_0); + for (i = 0; i < ret_val; i++) { + int degradation = 0; + if (get_imsm_disk(super, i) == NULL) + degradation++; + if (get_imsm_disk(super, i + 1) == NULL) + degradation++; + if (degradation == 2) + return 0; + } + map = get_imsm_map(dev, MAP_1); + /* if there is no second map + * result can be returned + */ + if (map == NULL) + return ret_val; + /* check degradation in second map + */ + for (i = 0; i < ret_val; i++) { + int degradation = 0; + if (get_imsm_disk(super, i) == NULL) + degradation++; + if (get_imsm_disk(super, i + 1) == NULL) + degradation++; + if (degradation == 2) + return 0; + } + return ret_val; + } + case 5: + return 1; + case 6: + return 2; + default: + return 0; + } +} + +/******************************************************************************* + * Function: open_backup_targets + * Description: Function opens file descriptors for all devices given in + * info->devs + * Parameters: + * info : general array info + * raid_disks : number of disks + * raid_fds : table of device's file descriptors + * super : intel super for raid10 degradation check + * dev : intel device for raid10 degradation check + * Returns: + * 0 : success + * -1 : fail + ******************************************************************************/ +int open_backup_targets(struct mdinfo *info, int raid_disks, int *raid_fds, + struct intel_super *super, struct imsm_dev *dev) +{ + struct mdinfo *sd; + int i; + int opened = 0; + + for (i = 0; i < raid_disks; i++) + raid_fds[i] = -1; + + for (sd = info->devs ; sd ; sd = sd->next) { + char *dn; + + if (sd->disk.state & (1<<MD_DISK_FAULTY)) { + dprintf("disk is faulty!!\n"); + continue; + } + + if ((sd->disk.raid_disk >= raid_disks) || + (sd->disk.raid_disk < 0)) + continue; + + dn = map_dev(sd->disk.major, + sd->disk.minor, 1); + raid_fds[sd->disk.raid_disk] = dev_open(dn, O_RDWR); + if (raid_fds[sd->disk.raid_disk] < 0) { + pr_err("cannot open component\n"); + continue; + } + opened++; + } + /* check if maximum array degradation level is not exceeded + */ + if ((raid_disks - opened) > + imsm_get_allowed_degradation(info->new_level, + raid_disks, + super, dev)) { + pr_err("Not enough disks can be opened.\n"); + close_targets(raid_fds, raid_disks); + return -2; + } + return 0; +} + +/******************************************************************************* + * Function: validate_container_imsm + * Description: This routine validates container after assemble, + * eg. if devices in container are under the same controller. + * + * Parameters: + * info : linked list with info about devices used in array + * Returns: + * 1 : HBA mismatch + * 0 : Success + ******************************************************************************/ +int validate_container_imsm(struct mdinfo *info) +{ + if (!check_env("IMSM_NO_PLATFORM")) { + struct sys_dev *idev; + struct mdinfo *dev; + char *hba_path = NULL; + char *dev_path = devt_to_devpath(makedev(info->disk.major, + info->disk.minor)); + + for (idev = find_intel_devices(); idev; idev = idev->next) { + if (strstr(dev_path, idev->path)) { + hba_path = idev->path; + break; + } + } + free(dev_path); + + if (hba_path) { + for (dev = info->next; dev; dev = dev->next) { + if (!devt_attached_to_hba(makedev(dev->disk.major, + dev->disk.minor), hba_path)) { + pr_err("WARNING - IMSM container assembled with disks under different HBAs!\n" + " This operation is not supported and can lead to data loss.\n"); + return 1; + } + } + } + } + return 0; +} +#ifndef MDASSEMBLE +/******************************************************************************* + * Function: init_migr_record_imsm + * Description: Function inits imsm migration record + * Parameters: + * super : imsm internal array info + * dev : device under migration + * info : general array info to find the smallest device + * Returns: + * none + ******************************************************************************/ +void init_migr_record_imsm(struct supertype *st, struct imsm_dev *dev, + struct mdinfo *info) +{ + struct intel_super *super = st->sb; + struct migr_record *migr_rec = super->migr_rec; + int new_data_disks; + unsigned long long dsize, dev_sectors; + long long unsigned min_dev_sectors = -1LLU; + struct mdinfo *sd; + char nm[30]; + int fd; + struct imsm_map *map_dest = get_imsm_map(dev, MAP_0); + struct imsm_map *map_src = get_imsm_map(dev, MAP_1); + unsigned long long num_migr_units; + unsigned long long array_blocks; + + memset(migr_rec, 0, sizeof(struct migr_record)); + migr_rec->family_num = __cpu_to_le32(super->anchor->family_num); + + /* only ascending reshape supported now */ + migr_rec->ascending_migr = __cpu_to_le32(1); + + migr_rec->dest_depth_per_unit = GEN_MIGR_AREA_SIZE / + max(map_dest->blocks_per_strip, map_src->blocks_per_strip); + migr_rec->dest_depth_per_unit *= + max(map_dest->blocks_per_strip, map_src->blocks_per_strip); + new_data_disks = imsm_num_data_members(dev, MAP_0); + migr_rec->blocks_per_unit = + __cpu_to_le32(migr_rec->dest_depth_per_unit * new_data_disks); + migr_rec->dest_depth_per_unit = + __cpu_to_le32(migr_rec->dest_depth_per_unit); + array_blocks = info->component_size * new_data_disks; + num_migr_units = + array_blocks / __le32_to_cpu(migr_rec->blocks_per_unit); + + if (array_blocks % __le32_to_cpu(migr_rec->blocks_per_unit)) + num_migr_units++; + migr_rec->num_migr_units = __cpu_to_le32(num_migr_units); + + migr_rec->post_migr_vol_cap = dev->size_low; + migr_rec->post_migr_vol_cap_hi = dev->size_high; + + /* Find the smallest dev */ + for (sd = info->devs ; sd ; sd = sd->next) { + sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor); + fd = dev_open(nm, O_RDONLY); + if (fd < 0) + continue; + get_dev_size(fd, NULL, &dsize); + dev_sectors = dsize / 512; + if (dev_sectors < min_dev_sectors) + min_dev_sectors = dev_sectors; + close(fd); + } + migr_rec->ckpt_area_pba = __cpu_to_le32(min_dev_sectors - + RAID_DISK_RESERVED_BLOCKS_IMSM_HI); + + write_imsm_migr_rec(st); + + return; +} + +/******************************************************************************* + * Function: save_backup_imsm + * Description: Function saves critical data stripes to Migration Copy Area + * and updates the current migration unit status. + * Use restore_stripes() to form a destination stripe, + * and to write it to the Copy Area. + * Parameters: + * st : supertype information + * dev : imsm device that backup is saved for + * info : general array info + * buf : input buffer + * length : length of data to backup (blocks_per_unit) + * Returns: + * 0 : success + *, -1 : fail + ******************************************************************************/ +int save_backup_imsm(struct supertype *st, + struct imsm_dev *dev, + struct mdinfo *info, + void *buf, + int length) +{ + int rv = -1; + struct intel_super *super = st->sb; + unsigned long long *target_offsets = NULL; + int *targets = NULL; + int i; + struct imsm_map *map_dest = get_imsm_map(dev, MAP_0); + int new_disks = map_dest->num_members; + int dest_layout = 0; + int dest_chunk; + unsigned long long start; + int data_disks = imsm_num_data_members(dev, MAP_0); + + targets = xmalloc(new_disks * sizeof(int)); + + for (i = 0; i < new_disks; i++) + targets[i] = -1; + + target_offsets = xcalloc(new_disks, sizeof(unsigned long long)); + + start = info->reshape_progress * 512; + for (i = 0; i < new_disks; i++) { + target_offsets[i] = (unsigned long long) + __le32_to_cpu(super->migr_rec->ckpt_area_pba) * 512; + /* move back copy area adderss, it will be moved forward + * in restore_stripes() using start input variable + */ + target_offsets[i] -= start/data_disks; + } + + if (open_backup_targets(info, new_disks, targets, + super, dev)) + goto abort; + + dest_layout = imsm_level_to_layout(map_dest->raid_level); + dest_chunk = __le16_to_cpu(map_dest->blocks_per_strip) * 512; + + if (restore_stripes(targets, /* list of dest devices */ + target_offsets, /* migration record offsets */ + new_disks, + dest_chunk, + map_dest->raid_level, + dest_layout, + -1, /* source backup file descriptor */ + 0, /* input buf offset + * always 0 buf is already offseted */ + start, + length, + buf) != 0) { + pr_err("Error restoring stripes\n"); + goto abort; + } + + rv = 0; + +abort: + if (targets) { + close_targets(targets, new_disks); + free(targets); + } + free(target_offsets); + + return rv; +} + +/******************************************************************************* + * Function: save_checkpoint_imsm + * Description: Function called for current unit status update + * in the migration record. It writes it to disk. + * Parameters: + * super : imsm internal array info + * info : general array info + * Returns: + * 0: success + * 1: failure + * 2: failure, means no valid migration record + * / no general migration in progress / + ******************************************************************************/ +int save_checkpoint_imsm(struct supertype *st, struct mdinfo *info, int state) +{ + struct intel_super *super = st->sb; + unsigned long long blocks_per_unit; + unsigned long long curr_migr_unit; + + if (load_imsm_migr_rec(super, info) != 0) { + dprintf("imsm: ERROR: Cannot read migration record " + "for checkpoint save.\n"); + return 1; + } + + blocks_per_unit = __le32_to_cpu(super->migr_rec->blocks_per_unit); + if (blocks_per_unit == 0) { + dprintf("imsm: no migration in progress.\n"); + return 2; + } + curr_migr_unit = info->reshape_progress / blocks_per_unit; + /* check if array is alligned to copy area + * if it is not alligned, add one to current migration unit value + * this can happend on array reshape finish only + */ + if (info->reshape_progress % blocks_per_unit) + curr_migr_unit++; + + super->migr_rec->curr_migr_unit = + __cpu_to_le32(curr_migr_unit); + super->migr_rec->rec_status = __cpu_to_le32(state); + super->migr_rec->dest_1st_member_lba = + __cpu_to_le32(curr_migr_unit * + __le32_to_cpu(super->migr_rec->dest_depth_per_unit)); + if (write_imsm_migr_rec(st) < 0) { + dprintf("imsm: Cannot write migration record " + "outside backup area\n"); + return 1; + } + + return 0; +} + +/******************************************************************************* + * Function: recover_backup_imsm + * Description: Function recovers critical data from the Migration Copy Area + * while assembling an array. + * Parameters: + * super : imsm internal array info + * info : general array info + * Returns: + * 0 : success (or there is no data to recover) + * 1 : fail + ******************************************************************************/ +int recover_backup_imsm(struct supertype *st, struct mdinfo *info) +{ + struct intel_super *super = st->sb; + struct migr_record *migr_rec = super->migr_rec; + struct imsm_map *map_dest = NULL; + struct intel_dev *id = NULL; + unsigned long long read_offset; + unsigned long long write_offset; + unsigned unit_len; + int *targets = NULL; + int new_disks, i, err; + char *buf = NULL; + int retval = 1; + unsigned long curr_migr_unit = __le32_to_cpu(migr_rec->curr_migr_unit); + unsigned long num_migr_units = __le32_to_cpu(migr_rec->num_migr_units); + char buffer[20]; + int skipped_disks = 0; + + err = sysfs_get_str(info, NULL, "array_state", (char *)buffer, 20); + if (err < 1) + return 1; + + /* recover data only during assemblation */ + if (strncmp(buffer, "inactive", 8) != 0) + return 0; + /* no data to recover */ + if (__le32_to_cpu(migr_rec->rec_status) == UNIT_SRC_NORMAL) + return 0; + if (curr_migr_unit >= num_migr_units) + return 1; + + /* find device during reshape */ + for (id = super->devlist; id; id = id->next) + if (is_gen_migration(id->dev)) + break; + if (id == NULL) + return 1; + + map_dest = get_imsm_map(id->dev, MAP_0); + new_disks = map_dest->num_members; + + read_offset = (unsigned long long) + __le32_to_cpu(migr_rec->ckpt_area_pba) * 512; + + write_offset = ((unsigned long long) + __le32_to_cpu(migr_rec->dest_1st_member_lba) + + pba_of_lba0(map_dest)) * 512; + + unit_len = __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512; + if (posix_memalign((void **)&buf, 512, unit_len) != 0) + goto abort; + targets = xcalloc(new_disks, sizeof(int)); + + if (open_backup_targets(info, new_disks, targets, super, id->dev)) { + pr_err("Cannot open some devices belonging to array.\n"); + goto abort; + } + + for (i = 0; i < new_disks; i++) { + if (targets[i] < 0) { + skipped_disks++; + continue; + } + if (lseek64(targets[i], read_offset, SEEK_SET) < 0) { + pr_err("Cannot seek to block: %s\n", + strerror(errno)); + skipped_disks++; + continue; + } + if ((unsigned)read(targets[i], buf, unit_len) != unit_len) { + pr_err("Cannot read copy area block: %s\n", + strerror(errno)); + skipped_disks++; + continue; + } + if (lseek64(targets[i], write_offset, SEEK_SET) < 0) { + pr_err("Cannot seek to block: %s\n", + strerror(errno)); + skipped_disks++; + continue; + } + if ((unsigned)write(targets[i], buf, unit_len) != unit_len) { + pr_err("Cannot restore block: %s\n", + strerror(errno)); + skipped_disks++; + continue; + } + } + + if (skipped_disks > imsm_get_allowed_degradation(info->new_level, + new_disks, + super, + id->dev)) { + pr_err("Cannot restore data from backup." + " Too many failed disks\n"); + goto abort; + } + + if (save_checkpoint_imsm(st, info, UNIT_SRC_NORMAL)) { + /* ignore error == 2, this can mean end of reshape here + */ + dprintf("imsm: Cannot write checkpoint to " + "migration record (UNIT_SRC_NORMAL) during restart\n"); + } else + retval = 0; + +abort: + if (targets) { + for (i = 0; i < new_disks; i++) + if (targets[i]) + close(targets[i]); + free(targets); + } + free(buf); + return retval; +} + +static char disk_by_path[] = "/dev/disk/by-path/"; + +static const char *imsm_get_disk_controller_domain(const char *path) +{ + char disk_path[PATH_MAX]; + char *drv=NULL; + struct stat st; + + strcpy(disk_path, disk_by_path); + strncat(disk_path, path, PATH_MAX - strlen(disk_path) - 1); + if (stat(disk_path, &st) == 0) { + struct sys_dev* hba; + char *path=NULL; + + path = devt_to_devpath(st.st_rdev); + if (path == NULL) + return "unknown"; + hba = find_disk_attached_hba(-1, path); + if (hba && hba->type == SYS_DEV_SAS) + drv = "isci"; + else if (hba && hba->type == SYS_DEV_SATA) + drv = "ahci"; + else + drv = "unknown"; + dprintf("path: %s hba: %s attached: %s\n", + path, (hba) ? hba->path : "NULL", drv); + free(path); + } + return drv; +} + +static char *imsm_find_array_devnm_by_subdev(int subdev, char *container) +{ + static char devnm[32]; + char subdev_name[20]; + struct mdstat_ent *mdstat; + + sprintf(subdev_name, "%d", subdev); + mdstat = mdstat_by_subdev(subdev_name, container); + if (!mdstat) + return NULL; + + strcpy(devnm, mdstat->devnm); + free_mdstat(mdstat); + return devnm; +} + +static int imsm_reshape_is_allowed_on_container(struct supertype *st, + struct geo_params *geo, + int *old_raid_disks, + int direction) +{ + /* currently we only support increasing the number of devices + * for a container. This increases the number of device for each + * member array. They must all be RAID0 or RAID5. + */ + int ret_val = 0; + struct mdinfo *info, *member; + int devices_that_can_grow = 0; + + dprintf("imsm: imsm_reshape_is_allowed_on_container(ENTER): " + "st->devnm = (%s)\n", st->devnm); + + if (geo->size > 0 || + geo->level != UnSet || + geo->layout != UnSet || + geo->chunksize != 0 || + geo->raid_disks == UnSet) { + dprintf("imsm: Container operation is allowed for " + "raid disks number change only.\n"); + return ret_val; + } + + if (direction == ROLLBACK_METADATA_CHANGES) { + dprintf("imsm: Metadata changes rollback is not supported for " + "container operation.\n"); + return ret_val; + } + + info = container_content_imsm(st, NULL); + for (member = info; member; member = member->next) { + char *result; + + dprintf("imsm: checking device_num: %i\n", + member->container_member); + + if (geo->raid_disks <= member->array.raid_disks) { + /* we work on container for Online Capacity Expansion + * only so raid_disks has to grow + */ + dprintf("imsm: for container operation raid disks " + "increase is required\n"); + break; + } + + if ((info->array.level != 0) && + (info->array.level != 5)) { + /* we cannot use this container with other raid level + */ + dprintf("imsm: for container operation wrong" + " raid level (%i) detected\n", + info->array.level); + break; + } else { + /* check for platform support + * for this raid level configuration + */ + struct intel_super *super = st->sb; + if (!is_raid_level_supported(super->orom, + member->array.level, + geo->raid_disks)) { + dprintf("platform does not support raid%d with" + " %d disk%s\n", + info->array.level, + geo->raid_disks, + geo->raid_disks > 1 ? "s" : ""); + break; + } + /* check if component size is aligned to chunk size + */ + if (info->component_size % + (info->array.chunk_size/512)) { + dprintf("Component size is not aligned to " + "chunk size\n"); + break; + } + } + + if (*old_raid_disks && + info->array.raid_disks != *old_raid_disks) + break; + *old_raid_disks = info->array.raid_disks; + + /* All raid5 and raid0 volumes in container + * have to be ready for Online Capacity Expansion + * so they need to be assembled. We have already + * checked that no recovery etc is happening. + */ + result = imsm_find_array_devnm_by_subdev(member->container_member, + st->container_devnm); + if (result == NULL) { + dprintf("imsm: cannot find array\n"); + break; + } + devices_that_can_grow++; + } + sysfs_free(info); + if (!member && devices_that_can_grow) + ret_val = 1; + + if (ret_val) + dprintf("\tContainer operation allowed\n"); + else + dprintf("\tError: %i\n", ret_val); + + return ret_val; +} + +/* Function: get_spares_for_grow + * Description: Allocates memory and creates list of spare devices + * avaliable in container. Checks if spare drive size is acceptable. + * Parameters: Pointer to the supertype structure + * Returns: Pointer to the list of spare devices (mdinfo structure) on success, + * NULL if fail + */ +static struct mdinfo *get_spares_for_grow(struct supertype *st) +{ + unsigned long long min_size = min_acceptable_spare_size_imsm(st); + return container_choose_spares(st, min_size, NULL, NULL, NULL, 0); +} + +/****************************************************************************** + * function: imsm_create_metadata_update_for_reshape + * Function creates update for whole IMSM container. + * + ******************************************************************************/ +static int imsm_create_metadata_update_for_reshape( + struct supertype *st, + struct geo_params *geo, + int old_raid_disks, + struct imsm_update_reshape **updatep) +{ + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + int update_memory_size = 0; + struct imsm_update_reshape *u = NULL; + struct mdinfo *spares = NULL; + int i; + int delta_disks = 0; + struct mdinfo *dev; + + dprintf("imsm_update_metadata_for_reshape(enter) raid_disks = %i\n", + geo->raid_disks); + + delta_disks = geo->raid_disks - old_raid_disks; + + /* size of all update data without anchor */ + update_memory_size = sizeof(struct imsm_update_reshape); + + /* now add space for spare disks that we need to add. */ + update_memory_size += sizeof(u->new_disks[0]) * (delta_disks - 1); + + u = xcalloc(1, update_memory_size); + u->type = update_reshape_container_disks; + u->old_raid_disks = old_raid_disks; + u->new_raid_disks = geo->raid_disks; + + /* now get spare disks list + */ + spares = get_spares_for_grow(st); + + if (spares == NULL + || delta_disks > spares->array.spare_disks) { + pr_err("imsm: ERROR: Cannot get spare devices " + "for %s.\n", geo->dev_name); + i = -1; + goto abort; + } + + /* we have got spares + * update disk list in imsm_disk list table in anchor + */ + dprintf("imsm: %i spares are available.\n\n", + spares->array.spare_disks); + + dev = spares->devs; + for (i = 0; i < delta_disks; i++) { + struct dl *dl; + + if (dev == NULL) + break; + u->new_disks[i] = makedev(dev->disk.major, + dev->disk.minor); + dl = get_disk_super(super, dev->disk.major, dev->disk.minor); + dl->index = mpb->num_disks; + mpb->num_disks++; + dev = dev->next; + } + +abort: + /* free spares + */ + sysfs_free(spares); + + dprintf("imsm: reshape update preparation :"); + if (i == delta_disks) { + dprintf(" OK\n"); + *updatep = u; + return update_memory_size; + } + free(u); + dprintf(" Error\n"); + + return 0; +} + +/****************************************************************************** + * function: imsm_create_metadata_update_for_size_change() + * Creates update for IMSM array for array size change. + * + ******************************************************************************/ +static int imsm_create_metadata_update_for_size_change( + struct supertype *st, + struct geo_params *geo, + struct imsm_update_size_change **updatep) +{ + struct intel_super *super = st->sb; + int update_memory_size = 0; + struct imsm_update_size_change *u = NULL; + + dprintf("imsm_create_metadata_update_for_size_change(enter)" + " New size = %llu\n", geo->size); + + /* size of all update data without anchor */ + update_memory_size = sizeof(struct imsm_update_size_change); + + u = xcalloc(1, update_memory_size); + u->type = update_size_change; + u->subdev = super->current_vol; + u->new_size = geo->size; + + dprintf("imsm: reshape update preparation : OK\n"); + *updatep = u; + + return update_memory_size; +} + +/****************************************************************************** + * function: imsm_create_metadata_update_for_migration() + * Creates update for IMSM array. + * + ******************************************************************************/ +static int imsm_create_metadata_update_for_migration( + struct supertype *st, + struct geo_params *geo, + struct imsm_update_reshape_migration **updatep) +{ + struct intel_super *super = st->sb; + int update_memory_size = 0; + struct imsm_update_reshape_migration *u = NULL; + struct imsm_dev *dev; + int previous_level = -1; + + dprintf("imsm_create_metadata_update_for_migration(enter)" + " New Level = %i\n", geo->level); + + /* size of all update data without anchor */ + update_memory_size = sizeof(struct imsm_update_reshape_migration); + + u = xcalloc(1, update_memory_size); + u->type = update_reshape_migration; + u->subdev = super->current_vol; + u->new_level = geo->level; + u->new_layout = geo->layout; + u->new_raid_disks = u->old_raid_disks = geo->raid_disks; + u->new_disks[0] = -1; + u->new_chunksize = -1; + + dev = get_imsm_dev(super, u->subdev); + if (dev) { + struct imsm_map *map; + + map = get_imsm_map(dev, MAP_0); + if (map) { + int current_chunk_size = + __le16_to_cpu(map->blocks_per_strip) / 2; + + if (geo->chunksize != current_chunk_size) { + u->new_chunksize = geo->chunksize / 1024; + dprintf("imsm: " + "chunk size change from %i to %i\n", + current_chunk_size, u->new_chunksize); + } + previous_level = map->raid_level; + } + } + if ((geo->level == 5) && (previous_level == 0)) { + struct mdinfo *spares = NULL; + + u->new_raid_disks++; + spares = get_spares_for_grow(st); + if ((spares == NULL) || (spares->array.spare_disks < 1)) { + free(u); + sysfs_free(spares); + update_memory_size = 0; + dprintf("error: cannot get spare device " + "for requested migration"); + return 0; + } + sysfs_free(spares); + } + dprintf("imsm: reshape update preparation : OK\n"); + *updatep = u; + + return update_memory_size; +} + +static void imsm_update_metadata_locally(struct supertype *st, + void *buf, int len) +{ + struct metadata_update mu; + + mu.buf = buf; + mu.len = len; + mu.space = NULL; + mu.space_list = NULL; + mu.next = NULL; + if (imsm_prepare_update(st, &mu)) + imsm_process_update(st, &mu); + + while (mu.space_list) { + void **space = mu.space_list; + mu.space_list = *space; + free(space); + } +} + +/*************************************************************************** +* Function: imsm_analyze_change +* Description: Function analyze change for single volume +* and validate if transition is supported +* Parameters: Geometry parameters, supertype structure, +* metadata change direction (apply/rollback) +* Returns: Operation type code on success, -1 if fail +****************************************************************************/ +enum imsm_reshape_type imsm_analyze_change(struct supertype *st, + struct geo_params *geo, + int direction) +{ + struct mdinfo info; + int change = -1; + int check_devs = 0; + int chunk; + /* number of added/removed disks in operation result */ + int devNumChange = 0; + /* imsm compatible layout value for array geometry verification */ + int imsm_layout = -1; + int data_disks; + struct imsm_dev *dev; + struct intel_super *super; + unsigned long long current_size; + unsigned long long free_size; + unsigned long long max_size; + int rv; + + getinfo_super_imsm_volume(st, &info, NULL); + if ((geo->level != info.array.level) && + (geo->level >= 0) && + (geo->level != UnSet)) { + switch (info.array.level) { + case 0: + if (geo->level == 5) { + change = CH_MIGRATION; + if (geo->layout != ALGORITHM_LEFT_ASYMMETRIC) { + pr_err("Error. Requested Layout " + "not supported (left-asymmetric layout " + "is supported only)!\n"); + change = -1; + goto analyse_change_exit; + } + imsm_layout = geo->layout; + check_devs = 1; + devNumChange = 1; /* parity disk added */ + } else if (geo->level == 10) { + change = CH_TAKEOVER; + check_devs = 1; + devNumChange = 2; /* two mirrors added */ + imsm_layout = 0x102; /* imsm supported layout */ + } + break; + case 1: + case 10: + if (geo->level == 0) { + change = CH_TAKEOVER; + check_devs = 1; + devNumChange = -(geo->raid_disks/2); + imsm_layout = 0; /* imsm raid0 layout */ + } + break; + } + if (change == -1) { + pr_err("Error. Level Migration from %d to %d " + "not supported!\n", + info.array.level, geo->level); + goto analyse_change_exit; + } + } else + geo->level = info.array.level; + + if ((geo->layout != info.array.layout) + && ((geo->layout != UnSet) && (geo->layout != -1))) { + change = CH_MIGRATION; + if ((info.array.layout == 0) + && (info.array.level == 5) + && (geo->layout == 5)) { + /* reshape 5 -> 4 */ + } else if ((info.array.layout == 5) + && (info.array.level == 5) + && (geo->layout == 0)) { + /* reshape 4 -> 5 */ + geo->layout = 0; + geo->level = 5; + } else { + pr_err("Error. Layout Migration from %d to %d " + "not supported!\n", + info.array.layout, geo->layout); + change = -1; + goto analyse_change_exit; + } + } else { + geo->layout = info.array.layout; + if (imsm_layout == -1) + imsm_layout = info.array.layout; + } + + if ((geo->chunksize > 0) && (geo->chunksize != UnSet) + && (geo->chunksize != info.array.chunk_size)) + change = CH_MIGRATION; + else + geo->chunksize = info.array.chunk_size; + + chunk = geo->chunksize / 1024; + + super = st->sb; + dev = get_imsm_dev(super, super->current_vol); + data_disks = imsm_num_data_members(dev , MAP_0); + /* compute current size per disk member + */ + current_size = info.custom_array_size / data_disks; + + if ((geo->size > 0) && (geo->size != MAX_SIZE)) { + /* align component size + */ + geo->size = imsm_component_size_aligment_check( + get_imsm_raid_level(dev->vol.map), + chunk * 1024, + geo->size * 2); + if (geo->size == 0) { + pr_err("Error. Size expansion is " \ + "supported only (current size is %llu, " \ + "requested size /rounded/ is 0).\n", + current_size); + goto analyse_change_exit; + } + } + + if ((current_size != geo->size) && (geo->size > 0)) { + if (change != -1) { + pr_err("Error. Size change should be the only " + "one at a time.\n"); + change = -1; + goto analyse_change_exit; + } + if ((super->current_vol + 1) != super->anchor->num_raid_devs) { + pr_err("Error. The last volume in container " + "can be expanded only (%i/%s).\n", + super->current_vol, st->devnm); + goto analyse_change_exit; + } + /* check the maximum available size + */ + rv = imsm_get_free_size(st, dev->vol.map->num_members, + 0, chunk, &free_size); + if (rv == 0) + /* Cannot find maximum available space + */ + max_size = 0; + else { + max_size = free_size + current_size; + /* align component size + */ + max_size = imsm_component_size_aligment_check( + get_imsm_raid_level(dev->vol.map), + chunk * 1024, + max_size); + } + if (geo->size == MAX_SIZE) { + /* requested size change to the maximum available size + */ + if (max_size == 0) { + pr_err("Error. Cannot find " + "maximum available space.\n"); + change = -1; + goto analyse_change_exit; + } else + geo->size = max_size; + } + + if ((direction == ROLLBACK_METADATA_CHANGES)) { + /* accept size for rollback only + */ + } else { + /* round size due to metadata compatibility + */ + geo->size = (geo->size >> SECT_PER_MB_SHIFT) + << SECT_PER_MB_SHIFT; + dprintf("Prepare update for size change to %llu\n", + geo->size ); + if (current_size >= geo->size) { + pr_err("Error. Size expansion is " + "supported only (current size is %llu, " + "requested size /rounded/ is %llu).\n", + current_size, geo->size); + goto analyse_change_exit; + } + if (max_size && geo->size > max_size) { + pr_err("Error. Requested size is larger " + "than maximum available size (maximum " + "available size is %llu, " + "requested size /rounded/ is %llu).\n", + max_size, geo->size); + goto analyse_change_exit; + } + } + geo->size *= data_disks; + geo->raid_disks = dev->vol.map->num_members; + change = CH_ARRAY_SIZE; + } + if (!validate_geometry_imsm(st, + geo->level, + imsm_layout, + geo->raid_disks + devNumChange, + &chunk, + geo->size, INVALID_SECTORS, + 0, 0, 1)) + change = -1; + + if (check_devs) { + struct intel_super *super = st->sb; + struct imsm_super *mpb = super->anchor; + + if (mpb->num_raid_devs > 1) { + pr_err("Error. Cannot perform operation on %s" + "- for this operation it MUST be single " + "array in container\n", + geo->dev_name); + change = -1; + } + } + +analyse_change_exit: + if ((direction == ROLLBACK_METADATA_CHANGES) && + ((change == CH_MIGRATION) || (change == CH_TAKEOVER))) { + dprintf("imsm: Metadata changes rollback is not supported for " + "migration and takeover operations.\n"); + change = -1; + } + return change; +} + +int imsm_takeover(struct supertype *st, struct geo_params *geo) +{ + struct intel_super *super = st->sb; + struct imsm_update_takeover *u; + + u = xmalloc(sizeof(struct imsm_update_takeover)); + + u->type = update_takeover; + u->subarray = super->current_vol; + + /* 10->0 transition */ + if (geo->level == 0) + u->direction = R10_TO_R0; + + /* 0->10 transition */ + if (geo->level == 10) + u->direction = R0_TO_R10; + + /* update metadata locally */ + imsm_update_metadata_locally(st, u, + sizeof(struct imsm_update_takeover)); + /* and possibly remotely */ + if (st->update_tail) + append_metadata_update(st, u, + sizeof(struct imsm_update_takeover)); + else + free(u); + + return 0; +} + +static int imsm_reshape_super(struct supertype *st, unsigned long long size, + int level, + int layout, int chunksize, int raid_disks, + int delta_disks, char *backup, char *dev, + int direction, int verbose) +{ + int ret_val = 1; + struct geo_params geo; + + dprintf("imsm: reshape_super called.\n"); + + memset(&geo, 0, sizeof(struct geo_params)); + + geo.dev_name = dev; + strcpy(geo.devnm, st->devnm); + geo.size = size; + geo.level = level; + geo.layout = layout; + geo.chunksize = chunksize; + geo.raid_disks = raid_disks; + if (delta_disks != UnSet) + geo.raid_disks += delta_disks; + + dprintf("\tfor level : %i\n", geo.level); + dprintf("\tfor raid_disks : %i\n", geo.raid_disks); + + if (experimental() == 0) + return ret_val; + + if (strcmp(st->container_devnm, st->devnm) == 0) { + /* On container level we can only increase number of devices. */ + dprintf("imsm: info: Container operation\n"); + int old_raid_disks = 0; + + if (imsm_reshape_is_allowed_on_container( + st, &geo, &old_raid_disks, direction)) { + struct imsm_update_reshape *u = NULL; + int len; + + len = imsm_create_metadata_update_for_reshape( + st, &geo, old_raid_disks, &u); + + if (len <= 0) { + dprintf("imsm: Cannot prepare update\n"); + goto exit_imsm_reshape_super; + } + + ret_val = 0; + /* update metadata locally */ + imsm_update_metadata_locally(st, u, len); + /* and possibly remotely */ + if (st->update_tail) + append_metadata_update(st, u, len); + else + free(u); + + } else { + pr_err("(imsm) Operation " + "is not allowed on this container\n"); + } + } else { + /* On volume level we support following operations + * - takeover: raid10 -> raid0; raid0 -> raid10 + * - chunk size migration + * - migration: raid5 -> raid0; raid0 -> raid5 + */ + struct intel_super *super = st->sb; + struct intel_dev *dev = super->devlist; + int change; + dprintf("imsm: info: Volume operation\n"); + /* find requested device */ + while (dev) { + char *devnm = + imsm_find_array_devnm_by_subdev( + dev->index, st->container_devnm); + if (devnm && strcmp(devnm, geo.devnm) == 0) + break; + dev = dev->next; + } + if (dev == NULL) { + pr_err("Cannot find %s (%s) subarray\n", + geo.dev_name, geo.devnm); + goto exit_imsm_reshape_super; + } + super->current_vol = dev->index; + change = imsm_analyze_change(st, &geo, direction); + switch (change) { + case CH_TAKEOVER: + ret_val = imsm_takeover(st, &geo); + break; + case CH_MIGRATION: { + struct imsm_update_reshape_migration *u = NULL; + int len = + imsm_create_metadata_update_for_migration( + st, &geo, &u); + if (len < 1) { + dprintf("imsm: " + "Cannot prepare update\n"); + break; + } + ret_val = 0; + /* update metadata locally */ + imsm_update_metadata_locally(st, u, len); + /* and possibly remotely */ + if (st->update_tail) + append_metadata_update(st, u, len); + else + free(u); + } + break; + case CH_ARRAY_SIZE: { + struct imsm_update_size_change *u = NULL; + int len = + imsm_create_metadata_update_for_size_change( + st, &geo, &u); + if (len < 1) { + dprintf("imsm: " + "Cannot prepare update\n"); + break; + } + ret_val = 0; + /* update metadata locally */ + imsm_update_metadata_locally(st, u, len); + /* and possibly remotely */ + if (st->update_tail) + append_metadata_update(st, u, len); + else + free(u); + } + break; + default: + ret_val = 1; + } + } + +exit_imsm_reshape_super: + dprintf("imsm: reshape_super Exit code = %i\n", ret_val); + return ret_val; +} + +/******************************************************************************* + * Function: wait_for_reshape_imsm + * Description: Function writes new sync_max value and waits until + * reshape process reach new position + * Parameters: + * sra : general array info + * ndata : number of disks in new array's layout + * Returns: + * 0 : success, + * 1 : there is no reshape in progress, + * -1 : fail + ******************************************************************************/ +int wait_for_reshape_imsm(struct mdinfo *sra, int ndata) +{ + int fd = sysfs_get_fd(sra, NULL, "sync_completed"); + unsigned long long completed; + /* to_complete : new sync_max position */ + unsigned long long to_complete = sra->reshape_progress; + unsigned long long position_to_set = to_complete / ndata; + + if (fd < 0) { + dprintf("imsm: wait_for_reshape_imsm() " + "cannot open reshape_position\n"); + return 1; + } + + if (sysfs_fd_get_ll(fd, &completed) < 0) { + dprintf("imsm: wait_for_reshape_imsm() " + "cannot read reshape_position (no reshape in progres)\n"); + close(fd); + return 0; + } + + if (completed > position_to_set) { + dprintf("imsm: wait_for_reshape_imsm() " + "wrong next position to set %llu (%llu)\n", + to_complete, position_to_set); + close(fd); + return -1; + } + dprintf("Position set: %llu\n", position_to_set); + if (sysfs_set_num(sra, NULL, "sync_max", + position_to_set) != 0) { + dprintf("imsm: wait_for_reshape_imsm() " + "cannot set reshape position to %llu\n", + position_to_set); + close(fd); + return -1; + } + + do { + char action[20]; + sysfs_wait(fd, NULL); + if (sysfs_get_str(sra, NULL, "sync_action", + action, 20) > 0 && + strncmp(action, "reshape", 7) != 0) + break; + if (sysfs_fd_get_ll(fd, &completed) < 0) { + dprintf("imsm: wait_for_reshape_imsm() " + "cannot read reshape_position (in loop)\n"); + close(fd); + return 1; + } + } while (completed < position_to_set); + close(fd); + return 0; + +} + +/******************************************************************************* + * Function: check_degradation_change + * Description: Check that array hasn't become failed. + * Parameters: + * info : for sysfs access + * sources : source disks descriptors + * degraded: previous degradation level + * Returns: + * degradation level + ******************************************************************************/ +int check_degradation_change(struct mdinfo *info, + int *sources, + int degraded) +{ + unsigned long long new_degraded; + int rv; + + rv = sysfs_get_ll(info, NULL, "degraded", &new_degraded); + if ((rv == -1) || (new_degraded != (unsigned long long)degraded)) { + /* check each device to ensure it is still working */ + struct mdinfo *sd; + new_degraded = 0; + for (sd = info->devs ; sd ; sd = sd->next) { + if (sd->disk.state & (1<<MD_DISK_FAULTY)) + continue; + if (sd->disk.state & (1<<MD_DISK_SYNC)) { + char sbuf[20]; + if (sysfs_get_str(info, + sd, "state", sbuf, 20) < 0 || + strstr(sbuf, "faulty") || + strstr(sbuf, "in_sync") == NULL) { + /* this device is dead */ + sd->disk.state = (1<<MD_DISK_FAULTY); + if (sd->disk.raid_disk >= 0 && + sources[sd->disk.raid_disk] >= 0) { + close(sources[ + sd->disk.raid_disk]); + sources[sd->disk.raid_disk] = + -1; + } + new_degraded++; + } + } + } + } + + return new_degraded; +} + +/******************************************************************************* + * Function: imsm_manage_reshape + * Description: Function finds array under reshape and it manages reshape + * process. It creates stripes backups (if required) and sets + * checheckpoits. + * Parameters: + * afd : Backup handle (nattive) - not used + * sra : general array info + * reshape : reshape parameters - not used + * st : supertype structure + * blocks : size of critical section [blocks] + * fds : table of source device descriptor + * offsets : start of array (offest per devices) + * dests : not used + * destfd : table of destination device descriptor + * destoffsets : table of destination offsets (per device) + * Returns: + * 1 : success, reshape is done + * 0 : fail + ******************************************************************************/ +static int imsm_manage_reshape( + int afd, struct mdinfo *sra, struct reshape *reshape, + struct supertype *st, unsigned long backup_blocks, + int *fds, unsigned long long *offsets, + int dests, int *destfd, unsigned long long *destoffsets) +{ + int ret_val = 0; + struct intel_super *super = st->sb; + struct intel_dev *dv = NULL; + struct imsm_dev *dev = NULL; + struct imsm_map *map_src; + int migr_vol_qan = 0; + int ndata, odata; /* [bytes] */ + int chunk; /* [bytes] */ + struct migr_record *migr_rec; + char *buf = NULL; + unsigned int buf_size; /* [bytes] */ + unsigned long long max_position; /* array size [bytes] */ + unsigned long long next_step; /* [blocks]/[bytes] */ + unsigned long long old_data_stripe_length; + unsigned long long start_src; /* [bytes] */ + unsigned long long start; /* [bytes] */ + unsigned long long start_buf_shift; /* [bytes] */ + int degraded = 0; + int source_layout = 0; + + if (!fds || !offsets || !sra) + goto abort; + + /* Find volume during the reshape */ + for (dv = super->devlist; dv; dv = dv->next) { + if (dv->dev->vol.migr_type == MIGR_GEN_MIGR + && dv->dev->vol.migr_state == 1) { + dev = dv->dev; + migr_vol_qan++; + } + } + /* Only one volume can migrate at the same time */ + if (migr_vol_qan != 1) { + pr_err(": %s", migr_vol_qan ? + "Number of migrating volumes greater than 1\n" : + "There is no volume during migrationg\n"); + goto abort; + } + + map_src = get_imsm_map(dev, MAP_1); + if (map_src == NULL) + goto abort; + + ndata = imsm_num_data_members(dev, MAP_0); + odata = imsm_num_data_members(dev, MAP_1); + + chunk = __le16_to_cpu(map_src->blocks_per_strip) * 512; + old_data_stripe_length = odata * chunk; + + migr_rec = super->migr_rec; + + /* initialize migration record for start condition */ + if (sra->reshape_progress == 0) + init_migr_record_imsm(st, dev, sra); + else { + if (__le32_to_cpu(migr_rec->rec_status) != UNIT_SRC_NORMAL) { + dprintf("imsm: cannot restart migration when data " + "are present in copy area.\n"); + goto abort; + } + /* Save checkpoint to update migration record for current + * reshape position (in md). It can be farther than current + * reshape position in metadata. + */ + if (save_checkpoint_imsm(st, sra, UNIT_SRC_NORMAL) == 1) { + /* ignore error == 2, this can mean end of reshape here + */ + dprintf("imsm: Cannot write checkpoint to " + "migration record (UNIT_SRC_NORMAL, " + "initial save)\n"); + goto abort; + } + } + + /* size for data */ + buf_size = __le32_to_cpu(migr_rec->blocks_per_unit) * 512; + /* extend buffer size for parity disk */ + buf_size += __le32_to_cpu(migr_rec->dest_depth_per_unit) * 512; + /* add space for stripe aligment */ + buf_size += old_data_stripe_length; + if (posix_memalign((void **)&buf, 4096, buf_size)) { + dprintf("imsm: Cannot allocate checpoint buffer\n"); + goto abort; + } + + max_position = sra->component_size * ndata; + source_layout = imsm_level_to_layout(map_src->raid_level); + + while (__le32_to_cpu(migr_rec->curr_migr_unit) < + __le32_to_cpu(migr_rec->num_migr_units)) { + /* current reshape position [blocks] */ + unsigned long long current_position = + __le32_to_cpu(migr_rec->blocks_per_unit) + * __le32_to_cpu(migr_rec->curr_migr_unit); + unsigned long long border; + + /* Check that array hasn't become failed. + */ + degraded = check_degradation_change(sra, fds, degraded); + if (degraded > 1) { + dprintf("imsm: Abort reshape due to degradation" + " level (%i)\n", degraded); + goto abort; + } + + next_step = __le32_to_cpu(migr_rec->blocks_per_unit); + + if ((current_position + next_step) > max_position) + next_step = max_position - current_position; + + start = current_position * 512; + + /* allign reading start to old geometry */ + start_buf_shift = start % old_data_stripe_length; + start_src = start - start_buf_shift; + + border = (start_src / odata) - (start / ndata); + border /= 512; + if (border <= __le32_to_cpu(migr_rec->dest_depth_per_unit)) { + /* save critical stripes to buf + * start - start address of current unit + * to backup [bytes] + * start_src - start address of current unit + * to backup alligned to source array + * [bytes] + */ + unsigned long long next_step_filler = 0; + unsigned long long copy_length = next_step * 512; + + /* allign copy area length to stripe in old geometry */ + next_step_filler = ((copy_length + start_buf_shift) + % old_data_stripe_length); + if (next_step_filler) + next_step_filler = (old_data_stripe_length + - next_step_filler); + dprintf("save_stripes() parameters: start = %llu," + "\tstart_src = %llu,\tnext_step*512 = %llu," + "\tstart_in_buf_shift = %llu," + "\tnext_step_filler = %llu\n", + start, start_src, copy_length, + start_buf_shift, next_step_filler); + + if (save_stripes(fds, offsets, map_src->num_members, + chunk, map_src->raid_level, + source_layout, 0, NULL, start_src, + copy_length + + next_step_filler + start_buf_shift, + buf)) { + dprintf("imsm: Cannot save stripes" + " to buffer\n"); + goto abort; + } + /* Convert data to destination format and store it + * in backup general migration area + */ + if (save_backup_imsm(st, dev, sra, + buf + start_buf_shift, copy_length)) { + dprintf("imsm: Cannot save stripes to " + "target devices\n"); + goto abort; + } + if (save_checkpoint_imsm(st, sra, + UNIT_SRC_IN_CP_AREA)) { + dprintf("imsm: Cannot write checkpoint to " + "migration record (UNIT_SRC_IN_CP_AREA)\n"); + goto abort; + } + } else { + /* set next step to use whole border area */ + border /= next_step; + if (border > 1) + next_step *= border; + } + /* When data backed up, checkpoint stored, + * kick the kernel to reshape unit of data + */ + next_step = next_step + sra->reshape_progress; + /* limit next step to array max position */ + if (next_step > max_position) + next_step = max_position; + sysfs_set_num(sra, NULL, "suspend_lo", sra->reshape_progress); + sysfs_set_num(sra, NULL, "suspend_hi", next_step); + sra->reshape_progress = next_step; + + /* wait until reshape finish */ + if (wait_for_reshape_imsm(sra, ndata) < 0) { + dprintf("wait_for_reshape_imsm returned error!\n"); + goto abort; + } + if (sigterm) + goto abort; + + if (save_checkpoint_imsm(st, sra, UNIT_SRC_NORMAL) == 1) { + /* ignore error == 2, this can mean end of reshape here + */ + dprintf("imsm: Cannot write checkpoint to " + "migration record (UNIT_SRC_NORMAL)\n"); + goto abort; + } + + } + + /* return '1' if done */ + ret_val = 1; +abort: + free(buf); + abort_reshape(sra); + + return ret_val; +} + +#endif /* MDASSEMBLE */ + +struct superswitch super_imsm = { +#ifndef MDASSEMBLE + .examine_super = examine_super_imsm, + .brief_examine_super = brief_examine_super_imsm, + .brief_examine_subarrays = brief_examine_subarrays_imsm, + .export_examine_super = export_examine_super_imsm, + .detail_super = detail_super_imsm, + .brief_detail_super = brief_detail_super_imsm, + .write_init_super = write_init_super_imsm, + .validate_geometry = validate_geometry_imsm, + .add_to_super = add_to_super_imsm, + .remove_from_super = remove_from_super_imsm, + .detail_platform = detail_platform_imsm, + .export_detail_platform = export_detail_platform_imsm, + .kill_subarray = kill_subarray_imsm, + .update_subarray = update_subarray_imsm, + .load_container = load_container_imsm, + .default_geometry = default_geometry_imsm, + .get_disk_controller_domain = imsm_get_disk_controller_domain, + .reshape_super = imsm_reshape_super, + .manage_reshape = imsm_manage_reshape, + .recover_backup = recover_backup_imsm, + .copy_metadata = copy_metadata_imsm, +#endif + .match_home = match_home_imsm, + .uuid_from_super= uuid_from_super_imsm, + .getinfo_super = getinfo_super_imsm, + .getinfo_super_disks = getinfo_super_disks_imsm, + .update_super = update_super_imsm, + + .avail_size = avail_size_imsm, + .min_acceptable_spare_size = min_acceptable_spare_size_imsm, + + .compare_super = compare_super_imsm, + + .load_super = load_super_imsm, + .init_super = init_super_imsm, + .store_super = store_super_imsm, + .free_super = free_super_imsm, + .match_metadata_desc = match_metadata_desc_imsm, + .container_content = container_content_imsm, + .validate_container = validate_container_imsm, + + .external = 1, + .name = "imsm", + +#ifndef MDASSEMBLE +/* for mdmon */ + .open_new = imsm_open_new, + .set_array_state= imsm_set_array_state, + .set_disk = imsm_set_disk, + .sync_metadata = imsm_sync_metadata, + .activate_spare = imsm_activate_spare, + .process_update = imsm_process_update, + .prepare_update = imsm_prepare_update, +#endif /* MDASSEMBLE */ +}; 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