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authorMichael Tokarev <mjt@tls.msk.ru>2014-12-20 08:48:44 +0000
committerMichael Tokarev <mjt@tls.msk.ru>2014-12-20 08:48:44 +0000
commit489bea7ee8e1dbecfa517b8415568044ab57c73a (patch)
tree44d4878d4c7da3f4908ea9a765ef9b8f9c141756 /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.c10626
1 files changed, 10626 insertions, 0 deletions
diff --git a/super-intel.c b/super-intel.c
new file mode 100644
index 0000000..e28ac7d
--- /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 */
+};