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Diffstat (limited to 'super-ddf.c')
| -rw-r--r-- | super-ddf.c | 3227 |
1 files changed, 3227 insertions, 0 deletions
diff --git a/super-ddf.c b/super-ddf.c new file mode 100644 index 00000000..5d387504 --- /dev/null +++ b/super-ddf.c @@ -0,0 +1,3227 @@ +/* + * mdadm - manage Linux "md" devices aka RAID arrays. + * + * Copyright (C) 2006-2007 Neil Brown <neilb@suse.de> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Author: Neil Brown + * Email: <neil@brown.name> + * + * Specifications for DDF takes from Common RAID DDF Specification Revision 1.2 + * (July 28 2006). Reused by permission of SNIA. + */ + +#define HAVE_STDINT_H 1 +#include "mdadm.h" +#include "mdmon.h" +#include "sha1.h" +#include <values.h> + +/* a non-official T10 name for creation GUIDs */ +static char T10[] = "Linux-MD"; + +/* DDF timestamps are 1980 based, so we need to add + * second-in-decade-of-seventies to convert to linux timestamps. + * 10 years with 2 leap years. + */ +#define DECADE (3600*24*(365*10+2)) +unsigned long crc32( + unsigned long crc, + const unsigned char *buf, + unsigned len); + +/* The DDF metadata handling. + * DDF metadata lives at the end of the device. + * The last 512 byte block provides an 'anchor' which is used to locate + * the rest of the metadata which usually lives immediately behind the anchor. + * + * Note: + * - all multibyte numeric fields are bigendian. + * - all strings are space padded. + * + */ + +/* Primary Raid Level (PRL) */ +#define DDF_RAID0 0x00 +#define DDF_RAID1 0x01 +#define DDF_RAID3 0x03 +#define DDF_RAID4 0x04 +#define DDF_RAID5 0x05 +#define DDF_RAID1E 0x11 +#define DDF_JBOD 0x0f +#define DDF_CONCAT 0x1f +#define DDF_RAID5E 0x15 +#define DDF_RAID5EE 0x25 +#define DDF_RAID6 0x06 + +/* Raid Level Qualifier (RLQ) */ +#define DDF_RAID0_SIMPLE 0x00 +#define DDF_RAID1_SIMPLE 0x00 /* just 2 devices in this plex */ +#define DDF_RAID1_MULTI 0x01 /* exactly 3 devices in this plex */ +#define DDF_RAID3_0 0x00 /* parity in first extent */ +#define DDF_RAID3_N 0x01 /* parity in last extent */ +#define DDF_RAID4_0 0x00 /* parity in first extent */ +#define DDF_RAID4_N 0x01 /* parity in last extent */ +/* these apply to raid5e and raid5ee as well */ +#define DDF_RAID5_0_RESTART 0x00 /* same as 'right asymmetric' - layout 1 */ +#define DDF_RAID6_0_RESTART 0x01 /* raid6 different from raid5 here!!! */ +#define DDF_RAID5_N_RESTART 0x02 /* same as 'left asymmetric' - layout 0 */ +#define DDF_RAID5_N_CONTINUE 0x03 /* same as 'left symmetric' - layout 2 */ + +#define DDF_RAID1E_ADJACENT 0x00 /* raid10 nearcopies==2 */ +#define DDF_RAID1E_OFFSET 0x01 /* raid10 offsetcopies==2 */ + +/* Secondary RAID Level (SRL) */ +#define DDF_2STRIPED 0x00 /* This is weirder than RAID0 !! */ +#define DDF_2MIRRORED 0x01 +#define DDF_2CONCAT 0x02 +#define DDF_2SPANNED 0x03 /* This is also weird - be careful */ + +/* Magic numbers */ +#define DDF_HEADER_MAGIC __cpu_to_be32(0xDE11DE11) +#define DDF_CONTROLLER_MAGIC __cpu_to_be32(0xAD111111) +#define DDF_PHYS_RECORDS_MAGIC __cpu_to_be32(0x22222222) +#define DDF_PHYS_DATA_MAGIC __cpu_to_be32(0x33333333) +#define DDF_VIRT_RECORDS_MAGIC __cpu_to_be32(0xDDDDDDDD) +#define DDF_VD_CONF_MAGIC __cpu_to_be32(0xEEEEEEEE) +#define DDF_SPARE_ASSIGN_MAGIC __cpu_to_be32(0x55555555) +#define DDF_VU_CONF_MAGIC __cpu_to_be32(0x88888888) +#define DDF_VENDOR_LOG_MAGIC __cpu_to_be32(0x01dBEEF0) +#define DDF_BBM_LOG_MAGIC __cpu_to_be32(0xABADB10C) + +#define DDF_GUID_LEN 24 +#define DDF_REVISION_0 "01.00.00" +#define DDF_REVISION_2 "01.02.00" + +struct ddf_header { + __u32 magic; /* DDF_HEADER_MAGIC */ + __u32 crc; + char guid[DDF_GUID_LEN]; + char revision[8]; /* 01.02.00 */ + __u32 seq; /* starts at '1' */ + __u32 timestamp; + __u8 openflag; + __u8 foreignflag; + __u8 enforcegroups; + __u8 pad0; /* 0xff */ + __u8 pad1[12]; /* 12 * 0xff */ + /* 64 bytes so far */ + __u8 header_ext[32]; /* reserved: fill with 0xff */ + __u64 primary_lba; + __u64 secondary_lba; + __u8 type; + __u8 pad2[3]; /* 0xff */ + __u32 workspace_len; /* sectors for vendor space - + * at least 32768(sectors) */ + __u64 workspace_lba; + __u16 max_pd_entries; /* one of 15, 63, 255, 1023, 4095 */ + __u16 max_vd_entries; /* 2^(4,6,8,10,12)-1 : i.e. as above */ + __u16 max_partitions; /* i.e. max num of configuration + record entries per disk */ + __u16 config_record_len; /* 1 +ROUNDUP(max_primary_element_entries + *12/512) */ + __u16 max_primary_element_entries; /* 16, 64, 256, 1024, or 4096 */ + __u8 pad3[54]; /* 0xff */ + /* 192 bytes so far */ + __u32 controller_section_offset; + __u32 controller_section_length; + __u32 phys_section_offset; + __u32 phys_section_length; + __u32 virt_section_offset; + __u32 virt_section_length; + __u32 config_section_offset; + __u32 config_section_length; + __u32 data_section_offset; + __u32 data_section_length; + __u32 bbm_section_offset; + __u32 bbm_section_length; + __u32 diag_space_offset; + __u32 diag_space_length; + __u32 vendor_offset; + __u32 vendor_length; + /* 256 bytes so far */ + __u8 pad4[256]; /* 0xff */ +}; + +/* type field */ +#define DDF_HEADER_ANCHOR 0x00 +#define DDF_HEADER_PRIMARY 0x01 +#define DDF_HEADER_SECONDARY 0x02 + +/* The content of the 'controller section' - global scope */ +struct ddf_controller_data { + __u32 magic; /* DDF_CONTROLLER_MAGIC */ + __u32 crc; + char guid[DDF_GUID_LEN]; + struct controller_type { + __u16 vendor_id; + __u16 device_id; + __u16 sub_vendor_id; + __u16 sub_device_id; + } type; + char product_id[16]; + __u8 pad[8]; /* 0xff */ + __u8 vendor_data[448]; +}; + +/* The content of phys_section - global scope */ +struct phys_disk { + __u32 magic; /* DDF_PHYS_RECORDS_MAGIC */ + __u32 crc; + __u16 used_pdes; + __u16 max_pdes; + __u8 pad[52]; + struct phys_disk_entry { + char guid[DDF_GUID_LEN]; + __u32 refnum; + __u16 type; + __u16 state; + __u64 config_size; /* DDF structures must be after here */ + char path[18]; /* another horrible structure really */ + __u8 pad[6]; + } entries[0]; +}; + +/* phys_disk_entry.type is a bitmap - bigendian remember */ +#define DDF_Forced_PD_GUID 1 +#define DDF_Active_in_VD 2 +#define DDF_Global_Spare 4 /* VD_CONF records are ignored */ +#define DDF_Spare 8 /* overrides Global_spare */ +#define DDF_Foreign 16 +#define DDF_Legacy 32 /* no DDF on this device */ + +#define DDF_Interface_mask 0xf00 +#define DDF_Interface_SCSI 0x100 +#define DDF_Interface_SAS 0x200 +#define DDF_Interface_SATA 0x300 +#define DDF_Interface_FC 0x400 + +/* phys_disk_entry.state is a bigendian bitmap */ +#define DDF_Online 1 +#define DDF_Failed 2 /* overrides 1,4,8 */ +#define DDF_Rebuilding 4 +#define DDF_Transition 8 +#define DDF_SMART 16 +#define DDF_ReadErrors 32 +#define DDF_Missing 64 + +/* The content of the virt_section global scope */ +struct virtual_disk { + __u32 magic; /* DDF_VIRT_RECORDS_MAGIC */ + __u32 crc; + __u16 populated_vdes; + __u16 max_vdes; + __u8 pad[52]; + struct virtual_entry { + char guid[DDF_GUID_LEN]; + __u16 unit; + __u16 pad0; /* 0xffff */ + __u16 guid_crc; + __u16 type; + __u8 state; + __u8 init_state; + __u8 pad1[14]; + char name[16]; + } entries[0]; +}; + +/* virtual_entry.type is a bitmap - bigendian */ +#define DDF_Shared 1 +#define DDF_Enforce_Groups 2 +#define DDF_Unicode 4 +#define DDF_Owner_Valid 8 + +/* virtual_entry.state is a bigendian bitmap */ +#define DDF_state_mask 0x7 +#define DDF_state_optimal 0x0 +#define DDF_state_degraded 0x1 +#define DDF_state_deleted 0x2 +#define DDF_state_missing 0x3 +#define DDF_state_failed 0x4 +#define DDF_state_part_optimal 0x5 + +#define DDF_state_morphing 0x8 +#define DDF_state_inconsistent 0x10 + +/* virtual_entry.init_state is a bigendian bitmap */ +#define DDF_initstate_mask 0x03 +#define DDF_init_not 0x00 +#define DDF_init_quick 0x01 /* initialisation is progress. + * i.e. 'state_inconsistent' */ +#define DDF_init_full 0x02 + +#define DDF_access_mask 0xc0 +#define DDF_access_rw 0x00 +#define DDF_access_ro 0x80 +#define DDF_access_blocked 0xc0 + +/* The content of the config_section - local scope + * It has multiple records each config_record_len sectors + * They can be vd_config or spare_assign + */ + +struct vd_config { + __u32 magic; /* DDF_VD_CONF_MAGIC */ + __u32 crc; + char guid[DDF_GUID_LEN]; + __u32 timestamp; + __u32 seqnum; + __u8 pad0[24]; + __u16 prim_elmnt_count; + __u8 chunk_shift; /* 0 == 512, 1==1024 etc */ + __u8 prl; + __u8 rlq; + __u8 sec_elmnt_count; + __u8 sec_elmnt_seq; + __u8 srl; + __u64 blocks; /* blocks per component could be different + * on different component devices...(only + * for concat I hope) */ + __u64 array_blocks; /* blocks in array */ + __u8 pad1[8]; + __u32 spare_refs[8]; + __u8 cache_pol[8]; + __u8 bg_rate; + __u8 pad2[3]; + __u8 pad3[52]; + __u8 pad4[192]; + __u8 v0[32]; /* reserved- 0xff */ + __u8 v1[32]; /* reserved- 0xff */ + __u8 v2[16]; /* reserved- 0xff */ + __u8 v3[16]; /* reserved- 0xff */ + __u8 vendor[32]; + __u32 phys_refnum[0]; /* refnum of each disk in sequence */ + /*__u64 lba_offset[0]; LBA offset in each phys. Note extents in a + bvd are always the same size */ +}; + +/* vd_config.cache_pol[7] is a bitmap */ +#define DDF_cache_writeback 1 /* else writethrough */ +#define DDF_cache_wadaptive 2 /* only applies if writeback */ +#define DDF_cache_readahead 4 +#define DDF_cache_radaptive 8 /* only if doing read-ahead */ +#define DDF_cache_ifnobatt 16 /* even to write cache if battery is poor */ +#define DDF_cache_wallowed 32 /* enable write caching */ +#define DDF_cache_rallowed 64 /* enable read caching */ + +struct spare_assign { + __u32 magic; /* DDF_SPARE_ASSIGN_MAGIC */ + __u32 crc; + __u32 timestamp; + __u8 reserved[7]; + __u8 type; + __u16 populated; /* SAEs used */ + __u16 max; /* max SAEs */ + __u8 pad[8]; + struct spare_assign_entry { + char guid[DDF_GUID_LEN]; + __u16 secondary_element; + __u8 pad[6]; + } spare_ents[0]; +}; +/* spare_assign.type is a bitmap */ +#define DDF_spare_dedicated 0x1 /* else global */ +#define DDF_spare_revertible 0x2 /* else committable */ +#define DDF_spare_active 0x4 /* else not active */ +#define DDF_spare_affinity 0x8 /* enclosure affinity */ + +/* The data_section contents - local scope */ +struct disk_data { + __u32 magic; /* DDF_PHYS_DATA_MAGIC */ + __u32 crc; + char guid[DDF_GUID_LEN]; + __u32 refnum; /* crc of some magic drive data ... */ + __u8 forced_ref; /* set when above was not result of magic */ + __u8 forced_guid; /* set if guid was forced rather than magic */ + __u8 vendor[32]; + __u8 pad[442]; +}; + +/* bbm_section content */ +struct bad_block_log { + __u32 magic; + __u32 crc; + __u16 entry_count; + __u32 spare_count; + __u8 pad[10]; + __u64 first_spare; + struct mapped_block { + __u64 defective_start; + __u32 replacement_start; + __u16 remap_count; + __u8 pad[2]; + } entries[0]; +}; + +/* Struct for internally holding ddf structures */ +/* The DDF structure stored on each device is potentially + * quite different, as some data is global and some is local. + * The global data is: + * - ddf header + * - controller_data + * - Physical disk records + * - Virtual disk records + * The local data is: + * - Configuration records + * - Physical Disk data section + * ( and Bad block and vendor which I don't care about yet). + * + * The local data is parsed into separate lists as it is read + * and reconstructed for writing. This means that we only need + * to make config changes once and they are automatically + * propagated to all devices. + * Note that the ddf_super has space of the conf and disk data + * for this disk and also for a list of all such data. + * The list is only used for the superblock that is being + * built in Create or Assemble to describe the whole array. + */ +struct ddf_super { + struct ddf_header anchor, primary, secondary; + struct ddf_controller_data controller; + struct ddf_header *active; + struct phys_disk *phys; + struct virtual_disk *virt; + int pdsize, vdsize; + int max_part, mppe, conf_rec_len; + int currentdev; + int updates_pending; + struct vcl { + union { + char space[512]; + struct { + struct vcl *next; + __u64 *lba_offset; /* location in 'conf' of + * the lba table */ + int vcnum; /* index into ->virt */ + __u64 *block_sizes; /* NULL if all the same */ + }; + }; + struct vd_config conf; + } *conflist, *currentconf; + struct dl { + union { + char space[512]; + struct { + struct dl *next; + int major, minor; + char *devname; + int fd; + unsigned long long size; /* sectors */ + int pdnum; /* index in ->phys */ + struct spare_assign *spare; + }; + }; + struct disk_data disk; + struct vcl *vlist[0]; /* max_part in size */ + } *dlist; +}; + +#ifndef offsetof +#define offsetof(t,f) ((size_t)&(((t*)0)->f)) +#endif + + +static int calc_crc(void *buf, int len) +{ + /* crcs are always at the same place as in the ddf_header */ + struct ddf_header *ddf = buf; + __u32 oldcrc = ddf->crc; + __u32 newcrc; + ddf->crc = 0xffffffff; + + newcrc = crc32(0, buf, len); + ddf->crc = oldcrc; + return newcrc; +} + +static int load_ddf_header(int fd, unsigned long long lba, + unsigned long long size, + int type, + struct ddf_header *hdr, struct ddf_header *anchor) +{ + /* read a ddf header (primary or secondary) from fd/lba + * and check that it is consistent with anchor + * Need to check: + * magic, crc, guid, rev, and LBA's header_type, and + * everything after header_type must be the same + */ + if (lba >= size-1) + return 0; + + if (lseek64(fd, lba<<9, 0) < 0) + return 0; + + if (read(fd, hdr, 512) != 512) + return 0; + + if (hdr->magic != DDF_HEADER_MAGIC) + return 0; + if (calc_crc(hdr, 512) != hdr->crc) + return 0; + if (memcmp(anchor->guid, hdr->guid, DDF_GUID_LEN) != 0 || + memcmp(anchor->revision, hdr->revision, 8) != 0 || + anchor->primary_lba != hdr->primary_lba || + anchor->secondary_lba != hdr->secondary_lba || + hdr->type != type || + memcmp(anchor->pad2, hdr->pad2, 512 - + offsetof(struct ddf_header, pad2)) != 0) + return 0; + + /* Looks good enough to me... */ + return 1; +} + +static void *load_section(int fd, struct ddf_super *super, void *buf, + __u32 offset_be, __u32 len_be, int check) +{ + unsigned long long offset = __be32_to_cpu(offset_be); + unsigned long long len = __be32_to_cpu(len_be); + int dofree = (buf == NULL); + + if (check) + if (len != 2 && len != 8 && len != 32 + && len != 128 && len != 512) + return NULL; + + if (len > 1024) + return NULL; + if (buf) { + /* All pre-allocated sections are a single block */ + if (len != 1) + return NULL; + } else { + posix_memalign(&buf, 512, len<<9); + } + + if (!buf) + return NULL; + + if (super->active->type == 1) + offset += __be64_to_cpu(super->active->primary_lba); + else + offset += __be64_to_cpu(super->active->secondary_lba); + + if (lseek64(fd, offset<<9, 0) != (offset<<9)) { + if (dofree) + free(buf); + return NULL; + } + if (read(fd, buf, len<<9) != (len<<9)) { + if (dofree) + free(buf); + return NULL; + } + return buf; +} + +static int load_ddf_headers(int fd, struct ddf_super *super, char *devname) +{ + unsigned long long dsize; + + get_dev_size(fd, NULL, &dsize); + + if (lseek64(fd, dsize-512, 0) < 0) { + if (devname) + fprintf(stderr, + Name": Cannot seek to anchor block on %s: %s\n", + devname, strerror(errno)); + return 1; + } + if (read(fd, &super->anchor, 512) != 512) { + if (devname) + fprintf(stderr, + Name ": Cannot read anchor block on %s: %s\n", + devname, strerror(errno)); + return 1; + } + if (super->anchor.magic != DDF_HEADER_MAGIC) { + if (devname) + fprintf(stderr, Name ": no DDF anchor found on %s\n", + devname); + return 2; + } + if (calc_crc(&super->anchor, 512) != super->anchor.crc) { + if (devname) + fprintf(stderr, Name ": bad CRC on anchor on %s\n", + devname); + return 2; + } + if (memcmp(super->anchor.revision, DDF_REVISION_0, 8) != 0 && + memcmp(super->anchor.revision, DDF_REVISION_2, 8) != 0) { + if (devname) + fprintf(stderr, Name ": can only support super revision" + " %.8s and earlier, not %.8s on %s\n", + DDF_REVISION_2, super->anchor.revision,devname); + return 2; + } + if (load_ddf_header(fd, __be64_to_cpu(super->anchor.primary_lba), + dsize >> 9, 1, + &super->primary, &super->anchor) == 0) { + if (devname) + fprintf(stderr, + Name ": Failed to load primary DDF header " + "on %s\n", devname); + return 2; + } + super->active = &super->primary; + if (load_ddf_header(fd, __be64_to_cpu(super->anchor.secondary_lba), + dsize >> 9, 2, + &super->secondary, &super->anchor)) { + if ((__be32_to_cpu(super->primary.seq) + < __be32_to_cpu(super->secondary.seq) && + !super->secondary.openflag) + || (__be32_to_cpu(super->primary.seq) + == __be32_to_cpu(super->secondary.seq) && + super->primary.openflag && !super->secondary.openflag) + ) + super->active = &super->secondary; + } + return 0; +} + +static int load_ddf_global(int fd, struct ddf_super *super, char *devname) +{ + void *ok; + ok = load_section(fd, super, &super->controller, + super->active->controller_section_offset, + super->active->controller_section_length, + 0); + super->phys = load_section(fd, super, NULL, + super->active->phys_section_offset, + super->active->phys_section_length, + 1); + super->pdsize = __be32_to_cpu(super->active->phys_section_length) * 512; + + super->virt = load_section(fd, super, NULL, + super->active->virt_section_offset, + super->active->virt_section_length, + 1); + super->vdsize = __be32_to_cpu(super->active->virt_section_length) * 512; + if (!ok || + !super->phys || + !super->virt) { + free(super->phys); + free(super->virt); + super->phys = NULL; + super->virt = NULL; + return 2; + } + super->conflist = NULL; + super->dlist = NULL; + + super->max_part = __be16_to_cpu(super->active->max_partitions); + super->mppe = __be16_to_cpu(super->active->max_primary_element_entries); + super->conf_rec_len = __be16_to_cpu(super->active->config_record_len); + return 0; +} + +static int load_ddf_local(int fd, struct ddf_super *super, + char *devname, int keep) +{ + struct dl *dl; + struct stat stb; + char *conf; + int i; + int vnum; + int max_virt_disks = __be16_to_cpu(super->active->max_vd_entries); + unsigned long long dsize; + + /* First the local disk info */ + posix_memalign((void**)&dl, 512, + sizeof(*dl) + + (super->max_part) * sizeof(dl->vlist[0])); + + load_section(fd, super, &dl->disk, + super->active->data_section_offset, + super->active->data_section_length, + 0); + dl->devname = devname ? strdup(devname) : NULL; + + fstat(fd, &stb); + dl->major = major(stb.st_rdev); + dl->minor = minor(stb.st_rdev); + dl->next = super->dlist; + dl->fd = keep ? fd : -1; + + dl->size = 0; + if (get_dev_size(fd, devname, &dsize)) + dl->size = dsize >> 9; + dl->spare = NULL; + for (i=0 ; i < super->max_part ; i++) + dl->vlist[i] = NULL; + super->dlist = dl; + dl->pdnum = -1; + for (i=0; i < __be16_to_cpu(super->active->max_pd_entries); i++) + if (memcmp(super->phys->entries[i].guid, + dl->disk.guid, DDF_GUID_LEN) == 0) + dl->pdnum = i; + + /* Now the config list. */ + /* 'conf' is an array of config entries, some of which are + * probably invalid. Those which are good need to be copied into + * the conflist + */ + + conf = load_section(fd, super, NULL, + super->active->config_section_offset, + super->active->config_section_length, + 0); + + vnum = 0; + for (i = 0; + i < __be32_to_cpu(super->active->config_section_length); + i += super->conf_rec_len) { + struct vd_config *vd = + (struct vd_config *)((char*)conf + i*512); + struct vcl *vcl; + + if (vd->magic == DDF_SPARE_ASSIGN_MAGIC) { + if (dl->spare) + continue; + posix_memalign((void**)&dl->spare, 512, + super->conf_rec_len*512); + memcpy(dl->spare, vd, super->conf_rec_len*512); + continue; + } + if (vd->magic != DDF_VD_CONF_MAGIC) + continue; + for (vcl = super->conflist; vcl; vcl = vcl->next) { + if (memcmp(vcl->conf.guid, + vd->guid, DDF_GUID_LEN) == 0) + break; + } + + if (vcl) { + dl->vlist[vnum++] = vcl; + if (__be32_to_cpu(vd->seqnum) <= + __be32_to_cpu(vcl->conf.seqnum)) + continue; + } else { + posix_memalign((void**)&vcl, 512, + (super->conf_rec_len*512 + + offsetof(struct vcl, conf))); + vcl->next = super->conflist; + vcl->block_sizes = NULL; /* FIXME not for CONCAT */ + super->conflist = vcl; + dl->vlist[vnum++] = vcl; + } + memcpy(&vcl->conf, vd, super->conf_rec_len*512); + vcl->lba_offset = (__u64*) + &vcl->conf.phys_refnum[super->mppe]; + + for (i=0; i < max_virt_disks ; i++) + if (memcmp(super->virt->entries[i].guid, + vcl->conf.guid, DDF_GUID_LEN)==0) + break; + if (i < max_virt_disks) + vcl->vcnum = i; + } + free(conf); + + return 0; +} + +#ifndef MDASSEMBLE +static int load_super_ddf_all(struct supertype *st, int fd, + void **sbp, char *devname, int keep_fd); +#endif +static int load_super_ddf(struct supertype *st, int fd, + char *devname) +{ + unsigned long long dsize; + struct ddf_super *super; + int rv; + +#ifndef MDASSEMBLE + /* if 'fd' is a container, load metadata from all the devices */ + if (load_super_ddf_all(st, fd, &st->sb, devname, 1) == 0) + return 0; +#endif + if (st->subarray[0]) + return 1; /* FIXME Is this correct */ + + if (get_dev_size(fd, devname, &dsize) == 0) + return 1; + + /* 32M is a lower bound */ + if (dsize <= 32*1024*1024) { + if (devname) { + fprintf(stderr, + Name ": %s is too small for ddf: " + "size is %llu sectors.\n", + devname, dsize>>9); + return 1; + } + } + if (dsize & 511) { + if (devname) { + fprintf(stderr, + Name ": %s is an odd size for ddf: " + "size is %llu bytes.\n", + devname, dsize); + return 1; + } + } + + if (posix_memalign((void**)&super, 512, sizeof(*super))!= 0) { + fprintf(stderr, Name ": malloc of %zu failed.\n", + sizeof(*super)); + return 1; + } + memset(super, 0, sizeof(*super)); + + rv = load_ddf_headers(fd, super, devname); + if (rv) { + free(super); + return rv; + } + + /* Have valid headers and have chosen the best. Let's read in the rest*/ + + rv = load_ddf_global(fd, super, devname); + + if (rv) { + if (devname) + fprintf(stderr, + Name ": Failed to load all information " + "sections on %s\n", devname); + free(super); + return rv; + } + + load_ddf_local(fd, super, devname, 0); + + /* Should possibly check the sections .... */ + + st->sb = super; + if (st->ss == NULL) { + st->ss = &super_ddf; + st->minor_version = 0; + st->max_devs = 512; + } + return 0; + +} + +static void free_super_ddf(struct supertype *st) +{ + struct ddf_super *ddf = st->sb; + if (ddf == NULL) + return; + free(ddf->phys); + free(ddf->virt); + while (ddf->conflist) { + struct vcl *v = ddf->conflist; + ddf->conflist = v->next; + if (v->block_sizes) + free(v->block_sizes); + free(v); + } + while (ddf->dlist) { + struct dl *d = ddf->dlist; + ddf->dlist = d->next; + if (d->fd >= 0) + close(d->fd); + if (d->spare) + free(d->spare); + free(d); + } + free(ddf); + st->sb = NULL; +} + +static struct supertype *match_metadata_desc_ddf(char *arg) +{ + /* 'ddf' only support containers */ + struct supertype *st; + if (strcmp(arg, "ddf") != 0 && + strcmp(arg, "default") != 0 + ) + return NULL; + + st = malloc(sizeof(*st)); + memset(st, 0, sizeof(*st)); + st->ss = &super_ddf; + st->max_devs = 512; + st->minor_version = 0; + st->sb = NULL; + return st; +} + + +#ifndef MDASSEMBLE + +static mapping_t ddf_state[] = { + { "Optimal", 0}, + { "Degraded", 1}, + { "Deleted", 2}, + { "Missing", 3}, + { "Failed", 4}, + { "Partially Optimal", 5}, + { "-reserved-", 6}, + { "-reserved-", 7}, + { NULL, 0} +}; + +static mapping_t ddf_init_state[] = { + { "Not Initialised", 0}, + { "QuickInit in Progress", 1}, + { "Fully Initialised", 2}, + { "*UNKNOWN*", 3}, + { NULL, 0} +}; +static mapping_t ddf_access[] = { + { "Read/Write", 0}, + { "Reserved", 1}, + { "Read Only", 2}, + { "Blocked (no access)", 3}, + { NULL ,0} +}; + +static mapping_t ddf_level[] = { + { "RAID0", DDF_RAID0}, + { "RAID1", DDF_RAID1}, + { "RAID3", DDF_RAID3}, + { "RAID4", DDF_RAID4}, + { "RAID5", DDF_RAID5}, + { "RAID1E",DDF_RAID1E}, + { "JBOD", DDF_JBOD}, + { "CONCAT",DDF_CONCAT}, + { "RAID5E",DDF_RAID5E}, + { "RAID5EE",DDF_RAID5EE}, + { "RAID6", DDF_RAID6}, + { NULL, 0} +}; +static mapping_t ddf_sec_level[] = { + { "Striped", DDF_2STRIPED}, + { "Mirrored", DDF_2MIRRORED}, + { "Concat", DDF_2CONCAT}, + { "Spanned", DDF_2SPANNED}, + { NULL, 0} +}; +#endif + +struct num_mapping { + int num1, num2; +}; +static struct num_mapping ddf_level_num[] = { + { DDF_RAID0, 0 }, + { DDF_RAID1, 1 }, + { DDF_RAID3, LEVEL_UNSUPPORTED }, + { DDF_RAID4, 4 }, + { DDF_RAID5, 5 }, + { DDF_RAID1E, LEVEL_UNSUPPORTED }, + { DDF_JBOD, LEVEL_UNSUPPORTED }, + { DDF_CONCAT, LEVEL_LINEAR }, + { DDF_RAID5E, LEVEL_UNSUPPORTED }, + { DDF_RAID5EE, LEVEL_UNSUPPORTED }, + { DDF_RAID6, 6}, + { MAXINT, MAXINT } +}; + +static int map_num1(struct num_mapping *map, int num) +{ + int i; + for (i=0 ; map[i].num1 != MAXINT; i++) + if (map[i].num1 == num) + break; + return map[i].num2; +} + +#ifndef MDASSEMBLE +static void print_guid(char *guid, int tstamp) +{ + /* A GUIDs are part (or all) ASCII and part binary. + * They tend to be space padded. + * We print the GUID in HEX, then in parentheses add + * any initial ASCII sequence, and a possible + * time stamp from bytes 16-19 + */ + int l = DDF_GUID_LEN; + int i; + + for (i=0 ; i<DDF_GUID_LEN ; i++) { + if ((i&3)==0 && i != 0) printf(":"); + printf("%02X", guid[i]&255); + } + + printf(" ("); + while (l && guid[l-1] == ' ') + l--; + for (i=0 ; i<l ; i++) { + if (guid[i] >= 0x20 && guid[i] < 0x7f) + fputc(guid[i], stdout); + else + break; + } + if (tstamp) { + time_t then = __be32_to_cpu(*(__u32*)(guid+16)) + DECADE; + char tbuf[100]; + struct tm *tm; + tm = localtime(&then); + strftime(tbuf, 100, " %D %T",tm); + fputs(tbuf, stdout); + } + printf(")"); +} + +static void examine_vd(int n, struct ddf_super *sb, char *guid) +{ + int crl = sb->conf_rec_len; + struct vcl *vcl; + + for (vcl = sb->conflist ; vcl ; vcl = vcl->next) { + struct vd_config *vc = &vcl->conf; + + if (calc_crc(vc, crl*512) != vc->crc) + continue; + if (memcmp(vc->guid, guid, DDF_GUID_LEN) != 0) + continue; + + /* Ok, we know about this VD, let's give more details */ + printf(" Raid Devices[%d] : %d\n", n, + __be16_to_cpu(vc->prim_elmnt_count)); + printf(" Chunk Size[%d] : %d sectors\n", n, + 1 << vc->chunk_shift); + printf(" Raid Level[%d] : %s\n", n, + map_num(ddf_level, vc->prl)?:"-unknown-"); + if (vc->sec_elmnt_count != 1) { + printf(" Secondary Position[%d] : %d of %d\n", n, + vc->sec_elmnt_seq, vc->sec_elmnt_count); + printf(" Secondary Level[%d] : %s\n", n, + map_num(ddf_sec_level, vc->srl) ?: "-unknown-"); + } + printf(" Device Size[%d] : %llu\n", n, + __be64_to_cpu(vc->blocks)/2); + printf(" Array Size[%d] : %llu\n", n, + __be64_to_cpu(vc->array_blocks)/2); + } +} + +static void examine_vds(struct ddf_super *sb) +{ + int cnt = __be16_to_cpu(sb->virt->populated_vdes); + int i; + printf(" Virtual Disks : %d\n", cnt); + + for (i=0; i<cnt; i++) { + struct virtual_entry *ve = &sb->virt->entries[i]; + printf(" VD GUID[%d] : ", i); print_guid(ve->guid, 1); + printf("\n"); + printf(" unit[%d] : %d\n", i, __be16_to_cpu(ve->unit)); + printf(" state[%d] : %s, %s%s\n", i, + map_num(ddf_state, ve->state & 7), + (ve->state & 8) ? "Morphing, ": "", + (ve->state & 16)? "Not Consistent" : "Consistent"); + printf(" init state[%d] : %s\n", i, + map_num(ddf_init_state, ve->init_state&3)); + printf(" access[%d] : %s\n", i, + map_num(ddf_access, (ve->init_state>>6) & 3)); + printf(" Name[%d] : %.16s\n", i, ve->name); + examine_vd(i, sb, ve->guid); + } + if (cnt) printf("\n"); +} + +static void examine_pds(struct ddf_super *sb) +{ + int cnt = __be16_to_cpu(sb->phys->used_pdes); + int i; + struct dl *dl; + printf(" Physical Disks : %d\n", cnt); + + for (i=0 ; i<cnt ; i++) { + struct phys_disk_entry *pd = &sb->phys->entries[i]; + int type = __be16_to_cpu(pd->type); + int state = __be16_to_cpu(pd->state); + + printf(" PD GUID[%d] : ", i); print_guid(pd->guid, 0); + printf("\n"); + printf(" ref[%d] : %08x\n", i, + __be32_to_cpu(pd->refnum)); + printf(" mode[%d] : %s%s%s%s%s\n", i, + (type&2) ? "active":"", + (type&4) ? "Global Spare":"", + (type&8) ? "spare" : "", + (type&16)? ", foreign" : "", + (type&32)? "pass-through" : ""); + printf(" state[%d] : %s%s%s%s%s%s%s\n", i, + (state&1)? "Online": "Offline", + (state&2)? ", Failed": "", + (state&4)? ", Rebuilding": "", + (state&8)? ", in-transition": "", + (state&16)? ", SMART errors": "", + (state&32)? ", Unrecovered Read Errors": "", + (state&64)? ", Missing" : ""); + printf(" Avail Size[%d] : %llu K\n", i, + __be64_to_cpu(pd->config_size)>>1); + for (dl = sb->dlist; dl ; dl = dl->next) { + if (dl->disk.refnum == pd->refnum) { + char *dv = map_dev(dl->major, dl->minor, 0); + if (dv) + printf(" Device[%d] : %s\n", + i, dv); + } + } + printf("\n"); + } +} + +static void examine_super_ddf(struct supertype *st, char *homehost) +{ + struct ddf_super *sb = st->sb; + + printf(" Magic : %08x\n", __be32_to_cpu(sb->anchor.magic)); + printf(" Version : %.8s\n", sb->anchor.revision); + printf("Controller GUID : "); print_guid(sb->controller.guid, 0); + printf("\n"); + printf(" Container GUID : "); print_guid(sb->anchor.guid, 1); + printf("\n"); + printf(" Seq : %08x\n", __be32_to_cpu(sb->active->seq)); + printf(" Redundant hdr : %s\n", sb->secondary.magic == DDF_HEADER_MAGIC + ?"yes" : "no"); + examine_vds(sb); + examine_pds(sb); +} + +static void brief_examine_super_ddf(struct supertype *st) +{ + /* We just write a generic DDF ARRAY entry + * The uuid is all hex, 6 groups of 4 bytes + */ + struct ddf_super *ddf = st->sb; + int i; + printf("ARRAY /dev/ddf metadata=ddf UUID="); + for (i = 0; i < DDF_GUID_LEN; i++) { + if ((i&3) == 0 && i != 0) + printf(":"); + printf("%02X", 255&ddf->anchor.guid[i]); + } + printf("\n"); +} + +static void detail_super_ddf(struct supertype *st, char *homehost) +{ + /* FIXME later + * Could print DDF GUID + * Need to find which array + * If whole, briefly list all arrays + * If one, give name + */ +} + +static void brief_detail_super_ddf(struct supertype *st) +{ + /* FIXME I really need to know which array we are detailing. + * Can that be stored in ddf_super?? + */ +// struct ddf_super *ddf = st->sb; +} +#endif + +static int match_home_ddf(struct supertype *st, char *homehost) +{ + /* It matches 'this' host if the controller is a + * Linux-MD controller with vendor_data matching + * the hostname + */ + struct ddf_super *ddf = st->sb; + int len = strlen(homehost); + + return (memcmp(ddf->controller.guid, T10, 8) == 0 && + len < sizeof(ddf->controller.vendor_data) && + memcmp(ddf->controller.vendor_data, homehost,len) == 0 && + ddf->controller.vendor_data[len] == 0); +} + +static struct vd_config *find_vdcr(struct ddf_super *ddf, int inst) +{ + struct vcl *v; + + for (v = ddf->conflist; v; v = v->next) + if (inst == v->vcnum) + return &v->conf; + return NULL; +} + +static int find_phys(struct ddf_super *ddf, __u32 phys_refnum) +{ + /* Find the entry in phys_disk which has the given refnum + * and return it's index + */ + int i; + for (i=0; i < __be16_to_cpu(ddf->phys->max_pdes); i++) + if (ddf->phys->entries[i].refnum == phys_refnum) + return i; + return -1; +} + +static void uuid_from_super_ddf(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 + * 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. + * In the case of SVD we assume the BVD is of interest, + * though that might be the case if a bitmap were made for + * a mirrored SVD - worry about that later. + * So we need to find the VD configuration record for the + * relevant BVD and extract the GUID and Secondary_Element_Seq. + * The first 16 bytes of the sha1 of these is used. + */ + struct ddf_super *ddf = st->sb; + struct vcl *vcl = ddf->currentconf; + + if (!vcl) + memset(uuid, 0, sizeof (uuid)); + else { + char buf[20]; + struct sha1_ctx ctx; + sha1_init_ctx(&ctx); + sha1_process_bytes(&vcl->conf.guid, DDF_GUID_LEN, &ctx); + if (vcl->conf.sec_elmnt_count > 1) + sha1_process_bytes(&vcl->conf.sec_elmnt_seq, 1, &ctx); + sha1_finish_ctx(&ctx, buf); + memcpy(uuid, buf, sizeof(uuid)); + } +} + +static void getinfo_super_ddf_bvd(struct supertype *st, struct mdinfo *info); + +static void getinfo_super_ddf(struct supertype *st, struct mdinfo *info) +{ + struct ddf_super *ddf = st->sb; + + if (ddf->currentconf) { + getinfo_super_ddf_bvd(st, info); + return; + } + + info->array.raid_disks = __be16_to_cpu(ddf->phys->used_pdes); + info->array.level = LEVEL_CONTAINER; + info->array.layout = 0; + info->array.md_minor = -1; + info->array.ctime = DECADE + __be32_to_cpu(*(__u32*) + (ddf->anchor.guid+16)); + info->array.utime = 0; + info->array.chunk_size = 0; + + + info->disk.major = 0; + info->disk.minor = 0; + if (ddf->dlist) { + info->disk.number = __be32_to_cpu(ddf->dlist->disk.refnum); + info->disk.raid_disk = find_phys(ddf, ddf->dlist->disk.refnum); + + info->data_offset = __be64_to_cpu(ddf->phys-> + entries[info->disk.raid_disk]. + config_size); + info->component_size = ddf->dlist->size - info->data_offset; + } else { + info->disk.number = -1; +// info->disk.raid_disk = find refnum in the table and use index; + } + info->disk.state = (1 << MD_DISK_SYNC); + + + info->reshape_active = 0; + + strcpy(info->text_version, "ddf"); + +// uuid_from_super_ddf(info->uuid, sbv); + +// info->name[] ?? ; +} + +static int rlq_to_layout(int rlq, int prl, int raiddisks); + +static void getinfo_super_ddf_bvd(struct supertype *st, struct mdinfo *info) +{ + struct ddf_super *ddf = st->sb; + struct vcl *vc = ddf->currentconf; + int cd = ddf->currentdev; + + /* FIXME this returns BVD info - what if we want SVD ?? */ + + info->array.raid_disks = __be16_to_cpu(vc->conf.prim_elmnt_count); + info->array.level = map_num1(ddf_level_num, vc->conf.prl); + info->array.layout = rlq_to_layout(vc->conf.rlq, vc->conf.prl, + info->array.raid_disks); + info->array.md_minor = -1; + info->array.ctime = DECADE + + __be32_to_cpu(*(__u32*)(vc->conf.guid+16)); + info->array.utime = DECADE + __be32_to_cpu(vc->conf.timestamp); + info->array.chunk_size = 512 << vc->conf.chunk_shift; + + if (cd >= 0 && cd < ddf->mppe) { + info->data_offset = __be64_to_cpu(vc->lba_offset[cd]); + if (vc->block_sizes) + info->component_size = vc->block_sizes[cd]; + else + info->component_size = __be64_to_cpu(vc->conf.blocks); + } + + info->disk.major = 0; + info->disk.minor = 0; +// info->disk.number = __be32_to_cpu(ddf->disk.refnum); +// info->disk.raid_disk = find refnum in the table and use index; +// info->disk.state = ???; + + info->container_member = ddf->currentconf->vcnum; + + info->resync_start = 0; + if (!(ddf->virt->entries[info->container_member].state + & DDF_state_inconsistent) && + (ddf->virt->entries[info->container_member].init_state + & DDF_initstate_mask) + == DDF_init_full) + info->resync_start = ~0ULL; + + uuid_from_super_ddf(st, info->uuid); + + info->container_member = atoi(st->subarray); + sprintf(info->text_version, "/%s/%s", + devnum2devname(st->container_dev), + st->subarray); + +// info->name[] ?? ; +} + + +static int update_super_ddf(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. + * uuid: Change the uuid of the array to match what is given + * homehost: update the recorded homehost + * name: update the name - preserving the homehost + * _reshape_progress: record new reshape_progress position. + * + * Following are not relevant for this version: + * sparc2.2 : update from old dodgey metadata + * super-minor: change the preferred_minor number + * summaries: update redundant counters. + */ + int rv = 0; +// struct ddf_super *ddf = st->sb; +// struct vd_config *vd = find_vdcr(ddf, info->container_member); +// struct virtual_entry *ve = find_ve(ddf); + + /* we don't need to handle "force-*" or "assemble" as + * there is no need to 'trick' the kernel. We the metadata is + * first updated to activate the array, all the implied modifications + * will just happen. + */ + + if (strcmp(update, "grow") == 0) { + /* FIXME */ + } + if (strcmp(update, "resync") == 0) { +// info->resync_checkpoint = 0; + } + /* We ignore UUID updates as they make even less sense + * with DDF + */ + if (strcmp(update, "homehost") == 0) { + /* homehost is stored in controller->vendor_data, + * or it is when we are the vendor + */ +// if (info->vendor_is_local) +// strcpy(ddf->controller.vendor_data, homehost); + } + if (strcmp(update, "name") == 0) { + /* name is stored in virtual_entry->name */ +// memset(ve->name, ' ', 16); +// strncpy(ve->name, info->name, 16); + } + if (strcmp(update, "_reshape_progress") == 0) { + /* We don't support reshape yet */ + } + +// update_all_csum(ddf); + + return rv; +} + +static void make_header_guid(char *guid) +{ + __u32 stamp; + int rfd; + /* Create a DDF Header of Virtual Disk GUID */ + + /* 24 bytes of fiction required. + * first 8 are a 'vendor-id' - "Linux-MD" + * next 8 are controller type.. how about 0X DEAD BEEF 0000 0000 + * Remaining 8 random number plus timestamp + */ + memcpy(guid, T10, sizeof(T10)); + stamp = __cpu_to_be32(0xdeadbeef); + memcpy(guid+8, &stamp, 4); + stamp = __cpu_to_be32(0); + memcpy(guid+12, &stamp, 4); + stamp = __cpu_to_be32(time(0) - DECADE); + memcpy(guid+16, &stamp, 4); + rfd = open("/dev/urandom", O_RDONLY); + if (rfd < 0 || read(rfd, &stamp, 4) != 4) + stamp = random(); + memcpy(guid+20, &stamp, 4); + if (rfd >= 0) close(rfd); +} + +static int init_super_ddf_bvd(struct supertype *st, + mdu_array_info_t *info, + unsigned long long size, + char *name, char *homehost, + int *uuid); + +static int init_super_ddf(struct supertype *st, + mdu_array_info_t *info, + unsigned long long size, char *name, char *homehost, + int *uuid) +{ + /* 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 DDF, 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. + * + * We need to create the entire 'ddf' structure which includes: + * DDF headers - these are easy. + * Controller data - a Sector describing this controller .. not that + * this is a controller exactly. + * Physical Disk Record - one entry per device, so + * leave plenty of space. + * Virtual Disk Records - again, just leave plenty of space. + * This just lists VDs, doesn't give details + * Config records - describes the VDs that use this disk + * DiskData - describes 'this' device. + * BadBlockManagement - empty + * Diag Space - empty + * Vendor Logs - Could we put bitmaps here? + * + */ + struct ddf_super *ddf; + char hostname[17]; + int hostlen; + int max_phys_disks, max_virt_disks; + unsigned long long sector; + int clen; + int i; + int pdsize, vdsize; + struct phys_disk *pd; + struct virtual_disk *vd; + + if (!info) { + st->sb = NULL; + return 0; + } + if (st->sb) + return init_super_ddf_bvd(st, info, size, name, homehost, + uuid); + + posix_memalign((void**)&ddf, 512, sizeof(*ddf)); + memset(ddf, 0, sizeof(*ddf)); + ddf->dlist = NULL; /* no physical disks yet */ + ddf->conflist = NULL; /* No virtual disks yet */ + + /* At least 32MB *must* be reserved for the ddf. So let's just + * start 32MB from the end, and put the primary header there. + * Don't do secondary for now. + * We don't know exactly where that will be yet as it could be + * different on each device. To just set up the lengths. + * + */ + + ddf->anchor.magic = DDF_HEADER_MAGIC; + make_header_guid(ddf->anchor.guid); + + memcpy(ddf->anchor.revision, DDF_REVISION_2, 8); + ddf->anchor.seq = __cpu_to_be32(1); + ddf->anchor.timestamp = __cpu_to_be32(time(0) - DECADE); + ddf->anchor.openflag = 0xFF; + ddf->anchor.foreignflag = 0; + ddf->anchor.enforcegroups = 0; /* Is this best?? */ + ddf->anchor.pad0 = 0xff; + memset(ddf->anchor.pad1, 0xff, 12); + memset(ddf->anchor.header_ext, 0xff, 32); + ddf->anchor.primary_lba = ~(__u64)0; + ddf->anchor.secondary_lba = ~(__u64)0; + ddf->anchor.type = DDF_HEADER_ANCHOR; + memset(ddf->anchor.pad2, 0xff, 3); + ddf->anchor.workspace_len = __cpu_to_be32(32768); /* Must be reserved */ + ddf->anchor.workspace_lba = ~(__u64)0; /* Put this at bottom + of 32M reserved.. */ + max_phys_disks = 1023; /* Should be enough */ + ddf->anchor.max_pd_entries = __cpu_to_be16(max_phys_disks); + max_virt_disks = 255; + ddf->anchor.max_vd_entries = __cpu_to_be16(max_virt_disks); /* ?? */ + ddf->anchor.max_partitions = __cpu_to_be16(64); /* ?? */ + ddf->max_part = 64; + ddf->mppe = 256; + ddf->conf_rec_len = 1 + ROUND_UP(ddf->mppe * (4+8), 512)/512; + ddf->anchor.config_record_len = __cpu_to_be16(ddf->conf_rec_len); + ddf->anchor.max_primary_element_entries = __cpu_to_be16(ddf->mppe); + memset(ddf->anchor.pad3, 0xff, 54); + /* controller sections is one sector long immediately + * after the ddf header */ + sector = 1; + ddf->anchor.controller_section_offset = __cpu_to_be32(sector); + ddf->anchor.controller_section_length = __cpu_to_be32(1); + sector += 1; + + /* phys is 8 sectors after that */ + pdsize = ROUND_UP(sizeof(struct phys_disk) + + sizeof(struct phys_disk_entry)*max_phys_disks, + 512); + switch(pdsize/512) { + case 2: case 8: case 32: case 128: case 512: break; + default: abort(); + } + ddf->anchor.phys_section_offset = __cpu_to_be32(sector); + ddf->anchor.phys_section_length = + __cpu_to_be32(pdsize/512); /* max_primary_element_entries/8 */ + sector += pdsize/512; + + /* virt is another 32 sectors */ + vdsize = ROUND_UP(sizeof(struct virtual_disk) + + sizeof(struct virtual_entry) * max_virt_disks, + 512); + switch(vdsize/512) { + case 2: case 8: case 32: case 128: case 512: break; + default: abort(); + } + ddf->anchor.virt_section_offset = __cpu_to_be32(sector); + ddf->anchor.virt_section_length = + __cpu_to_be32(vdsize/512); /* max_vd_entries/8 */ + sector += vdsize/512; + + clen = ddf->conf_rec_len * (ddf->max_part+1); + ddf->anchor.config_section_offset = __cpu_to_be32(sector); + ddf->anchor.config_section_length = __cpu_to_be32(clen); + sector += clen; + + ddf->anchor.data_section_offset = __cpu_to_be32(sector); + ddf->anchor.data_section_length = __cpu_to_be32(1); + sector += 1; + + ddf->anchor.bbm_section_length = __cpu_to_be32(0); + ddf->anchor.bbm_section_offset = __cpu_to_be32(0xFFFFFFFF); + ddf->anchor.diag_space_length = __cpu_to_be32(0); + ddf->anchor.diag_space_offset = __cpu_to_be32(0xFFFFFFFF); + ddf->anchor.vendor_length = __cpu_to_be32(0); + ddf->anchor.vendor_offset = __cpu_to_be32(0xFFFFFFFF); + + memset(ddf->anchor.pad4, 0xff, 256); + + memcpy(&ddf->primary, &ddf->anchor, 512); + memcpy(&ddf->secondary, &ddf->anchor, 512); + + ddf->primary.openflag = 1; /* I guess.. */ + ddf->primary.type = DDF_HEADER_PRIMARY; + + ddf->secondary.openflag = 1; /* I guess.. */ + ddf->secondary.type = DDF_HEADER_SECONDARY; + + ddf->active = &ddf->primary; + + ddf->controller.magic = DDF_CONTROLLER_MAGIC; + + /* 24 more bytes of fiction required. + * first 8 are a 'vendor-id' - "Linux-MD" + * Remaining 16 are serial number.... maybe a hostname would do? + */ + memcpy(ddf->controller.guid, T10, sizeof(T10)); + gethostname(hostname, sizeof(hostname)); + hostname[sizeof(hostname) - 1] = 0; + hostlen = strlen(hostname); + memcpy(ddf->controller.guid + 24 - hostlen, hostname, hostlen); + for (i = strlen(T10) ; i+hostlen < 24; i++) + ddf->controller.guid[i] = ' '; + + ddf->controller.type.vendor_id = __cpu_to_be16(0xDEAD); + ddf->controller.type.device_id = __cpu_to_be16(0xBEEF); + ddf->controller.type.sub_vendor_id = 0; + ddf->controller.type.sub_device_id = 0; + memcpy(ddf->controller.product_id, "What Is My PID??", 16); + memset(ddf->controller.pad, 0xff, 8); + memset(ddf->controller.vendor_data, 0xff, 448); + + posix_memalign((void**)&pd, 512, pdsize); + ddf->phys = pd; + ddf->pdsize = pdsize; + + memset(pd, 0xff, pdsize); + memset(pd, 0, sizeof(*pd)); + pd->magic = DDF_PHYS_DATA_MAGIC; + pd->used_pdes = __cpu_to_be16(0); + pd->max_pdes = __cpu_to_be16(max_phys_disks); + memset(pd->pad, 0xff, 52); + + posix_memalign((void**)&vd, 512, vdsize); + ddf->virt = vd; + ddf->vdsize = vdsize; + memset(vd, 0, vdsize); + vd->magic = DDF_VIRT_RECORDS_MAGIC; + vd->populated_vdes = __cpu_to_be16(0); + vd->max_vdes = __cpu_to_be16(max_virt_disks); + memset(vd->pad, 0xff, 52); + + for (i=0; i<max_virt_disks; i++) + memset(&vd->entries[i], 0xff, sizeof(struct virtual_entry)); + + st->sb = ddf; + ddf->updates_pending = 1; + return 1; +} + +static int all_ff(char *guid) +{ + int i; + for (i = 0; i < DDF_GUID_LEN; i++) + if (guid[i] != (char)0xff) + return 0; + return 1; +} +static int chunk_to_shift(int chunksize) +{ + return ffs(chunksize/512)-1; +} + +static int level_to_prl(int level) +{ + switch (level) { + case LEVEL_LINEAR: return DDF_CONCAT; + case 0: return DDF_RAID0; + case 1: return DDF_RAID1; + case 4: return DDF_RAID4; + case 5: return DDF_RAID5; + case 6: return DDF_RAID6; + default: return -1; + } +} +static int layout_to_rlq(int level, int layout, int raiddisks) +{ + switch(level) { + case 0: + return DDF_RAID0_SIMPLE; + case 1: + switch(raiddisks) { + case 2: return DDF_RAID1_SIMPLE; + case 3: return DDF_RAID1_MULTI; + default: return -1; + } + case 4: + switch(layout) { + case 0: return DDF_RAID4_N; + } + break; + case 5: + case 6: + switch(layout) { + case ALGORITHM_LEFT_ASYMMETRIC: + return DDF_RAID5_N_RESTART; + case ALGORITHM_RIGHT_ASYMMETRIC: + if (level == 5) + return DDF_RAID5_0_RESTART; + else + return DDF_RAID6_0_RESTART; + case ALGORITHM_LEFT_SYMMETRIC: + return DDF_RAID5_N_CONTINUE; + case ALGORITHM_RIGHT_SYMMETRIC: + return -1; /* not mentioned in standard */ + } + } + return -1; +} + +static int rlq_to_layout(int rlq, int prl, int raiddisks) +{ + switch(prl) { + case DDF_RAID0: + return 0; /* hopefully rlq == DDF_RAID0_SIMPLE */ + case DDF_RAID1: + return 0; /* hopefully rlq == SIMPLE or MULTI depending + on raiddisks*/ + case DDF_RAID4: + switch(rlq) { + case DDF_RAID4_N: + return 0; + default: + /* not supported */ + return -1; /* FIXME this isn't checked */ + } + case DDF_RAID5: + switch(rlq) { + case DDF_RAID5_N_RESTART: + return ALGORITHM_LEFT_ASYMMETRIC; + case DDF_RAID5_0_RESTART: + return ALGORITHM_RIGHT_ASYMMETRIC; + case DDF_RAID5_N_CONTINUE: + return ALGORITHM_LEFT_SYMMETRIC; + default: + return -1; + } + case DDF_RAID6: + switch(rlq) { + case DDF_RAID5_N_RESTART: + return ALGORITHM_LEFT_ASYMMETRIC; + case DDF_RAID6_0_RESTART: + return ALGORITHM_RIGHT_ASYMMETRIC; + case DDF_RAID5_N_CONTINUE: + return ALGORITHM_LEFT_SYMMETRIC; + default: + return -1; + } + } + return -1; +} + +struct extent { + unsigned long long start, size; +}; +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 struct extent *get_extents(struct ddf_super *ddf, struct dl *dl) +{ + /* find a list of used extents on the give physical device + * (dnum) of the given ddf. + * Return a malloced array of 'struct extent' + +FIXME ignore DDF_Legacy devices? + + */ + struct extent *rv; + int n = 0; + int i, j; + + rv = malloc(sizeof(struct extent) * (ddf->max_part + 2)); + if (!rv) + return NULL; + + for (i = 0; i < ddf->max_part; i++) { + struct vcl *v = dl->vlist[i]; + if (v == NULL) + continue; + for (j=0; j < v->conf.prim_elmnt_count; j++) + if (v->conf.phys_refnum[j] == dl->disk.refnum) { + /* This device plays role 'j' in 'v'. */ + rv[n].start = __be64_to_cpu(v->lba_offset[j]); + rv[n].size = __be64_to_cpu(v->conf.blocks); + n++; + break; + } + } + qsort(rv, n, sizeof(*rv), cmp_extent); + + rv[n].start = __be64_to_cpu(ddf->phys->entries[dl->pdnum].config_size); + rv[n].size = 0; + return rv; +} + +static int init_super_ddf_bvd(struct supertype *st, + mdu_array_info_t *info, + unsigned long long size, + char *name, char *homehost, + int *uuid) +{ + /* We are creating a BVD inside a pre-existing container. + * so st->sb is already set. + * We need to create a new vd_config and a new virtual_entry + */ + struct ddf_super *ddf = st->sb; + int venum; + struct virtual_entry *ve; + struct vcl *vcl; + struct vd_config *vc; + + if (__be16_to_cpu(ddf->virt->populated_vdes) + >= __be16_to_cpu(ddf->virt->max_vdes)) { + fprintf(stderr, Name": This ddf already has the " + "maximum of %d virtual devices\n", + __be16_to_cpu(ddf->virt->max_vdes)); + return 0; + } + + for (venum = 0; venum < __be16_to_cpu(ddf->virt->max_vdes); venum++) + if (all_ff(ddf->virt->entries[venum].guid)) + break; + if (venum == __be16_to_cpu(ddf->virt->max_vdes)) { + fprintf(stderr, Name ": Cannot find spare slot for " + "virtual disk - DDF is corrupt\n"); + return 0; + } + ve = &ddf->virt->entries[venum]; + + /* A Virtual Disk GUID contains the T10 Vendor ID, controller type, + * timestamp, random number + */ + make_header_guid(ve->guid); + ve->unit = __cpu_to_be16(info->md_minor); + ve->pad0 = 0xFFFF; + ve->guid_crc = crc32(0, (unsigned char*)ddf->anchor.guid, DDF_GUID_LEN); + ve->type = 0; + ve->state = DDF_state_degraded; /* Will be modified as devices are added */ + if (info->state & 1) /* clean */ + ve->init_state = DDF_init_full; + else + ve->init_state = DDF_init_not; + + memset(ve->pad1, 0xff, 14); + memset(ve->name, ' ', 16); + if (name) + strncpy(ve->name, name, 16); + ddf->virt->populated_vdes = + __cpu_to_be16(__be16_to_cpu(ddf->virt->populated_vdes)+1); + + /* Now create a new vd_config */ + posix_memalign((void**)&vcl, 512, + (offsetof(struct vcl, conf) + ddf->conf_rec_len * 512)); + vcl->lba_offset = (__u64*) &vcl->conf.phys_refnum[ddf->mppe]; + vcl->vcnum = venum; + sprintf(st->subarray, "%d", venum); + vcl->block_sizes = NULL; /* FIXME not for CONCAT */ + + vc = &vcl->conf; + + vc->magic = DDF_VD_CONF_MAGIC; + memcpy(vc->guid, ve->guid, DDF_GUID_LEN); + vc->timestamp = __cpu_to_be32(time(0)-DECADE); + vc->seqnum = __cpu_to_be32(1); + memset(vc->pad0, 0xff, 24); + vc->prim_elmnt_count = __cpu_to_be16(info->raid_disks); + vc->chunk_shift = chunk_to_shift(info->chunk_size); + vc->prl = level_to_prl(info->level); + vc->rlq = layout_to_rlq(info->level, info->layout, info->raid_disks); + vc->sec_elmnt_count = 1; + vc->sec_elmnt_seq = 0; + vc->srl = 0; + vc->blocks = __cpu_to_be64(info->size * 2); + vc->array_blocks = __cpu_to_be64( + calc_array_size(info->level, info->raid_disks, info->layout, + info->chunk_size, info->size*2)); + memset(vc->pad1, 0xff, 8); + vc->spare_refs[0] = 0xffffffff; + vc->spare_refs[1] = 0xffffffff; + vc->spare_refs[2] = 0xffffffff; + vc->spare_refs[3] = 0xffffffff; + vc->spare_refs[4] = 0xffffffff; + vc->spare_refs[5] = 0xffffffff; + vc->spare_refs[6] = 0xffffffff; + vc->spare_refs[7] = 0xffffffff; + memset(vc->cache_pol, 0, 8); + vc->bg_rate = 0x80; + memset(vc->pad2, 0xff, 3); + memset(vc->pad3, 0xff, 52); + memset(vc->pad4, 0xff, 192); + memset(vc->v0, 0xff, 32); + memset(vc->v1, 0xff, 32); + memset(vc->v2, 0xff, 16); + memset(vc->v3, 0xff, 16); + memset(vc->vendor, 0xff, 32); + + memset(vc->phys_refnum, 0xff, 4*ddf->mppe); + memset(vc->phys_refnum+(ddf->mppe * 4), 0x00, 8*ddf->mppe); + + vcl->next = ddf->conflist; + ddf->conflist = vcl; + ddf->currentconf = vcl; + ddf->updates_pending = 1; + return 1; +} + +static void add_to_super_ddf_bvd(struct supertype *st, + mdu_disk_info_t *dk, int fd, char *devname) +{ + /* fd and devname identify a device with-in the ddf container (st). + * dk identifies a location in the new BVD. + * We need to find suitable free space in that device and update + * the phys_refnum and lba_offset for the newly created vd_config. + * We might also want to update the type in the phys_disk + * section. + */ + struct dl *dl; + struct ddf_super *ddf = st->sb; + struct vd_config *vc; + __u64 *lba_offset; + int working; + int i; + unsigned long long blocks, pos, esize; + struct extent *ex; + + for (dl = ddf->dlist; dl ; dl = dl->next) + if (dl->major == dk->major && + dl->minor == dk->minor) + break; + if (!dl || ! (dk->state & (1<<MD_DISK_SYNC))) + return; + + vc = &ddf->currentconf->conf; + lba_offset = ddf->currentconf->lba_offset; + + ex = get_extents(ddf, dl); + if (!ex) + return; + + i = 0; pos = 0; + blocks = __be64_to_cpu(vc->blocks); + if (ddf->currentconf->block_sizes) + blocks = ddf->currentconf->block_sizes[dk->raid_disk]; + + do { + esize = ex[i].start - pos; + if (esize >= blocks) + break; + pos = ex[i].start + ex[i].size; + i++; + } while (ex[i-1].size); + + free(ex); + if (esize < blocks) + return; + + ddf->currentdev = dk->raid_disk; + vc->phys_refnum[dk->raid_disk] = dl->disk.refnum; + lba_offset[dk->raid_disk] = __cpu_to_be64(pos); + + for (i=0; i < ddf->max_part ; i++) + if (dl->vlist[i] == NULL) + break; + if (i == ddf->max_part) + return; + dl->vlist[i] = ddf->currentconf; + + dl->fd = fd; + dl->devname = devname; + + /* Check how many working raid_disks, and if we can mark + * array as optimal yet + */ + working = 0; + + for (i=0; i < __be16_to_cpu(vc->prim_elmnt_count); i++) + if (vc->phys_refnum[i] != 0xffffffff) + working++; + + /* Find which virtual_entry */ + i = ddf->currentconf->vcnum; + if (working == __be16_to_cpu(vc->prim_elmnt_count)) + ddf->virt->entries[i].state = + (ddf->virt->entries[i].state & ~DDF_state_mask) + | DDF_state_optimal; + + if (vc->prl == DDF_RAID6 && + working+1 == __be16_to_cpu(vc->prim_elmnt_count)) + ddf->virt->entries[i].state = + (ddf->virt->entries[i].state & ~DDF_state_mask) + | DDF_state_part_optimal; + + ddf->phys->entries[dl->pdnum].type &= ~__cpu_to_be16(DDF_Global_Spare); + ddf->phys->entries[dl->pdnum].type |= __cpu_to_be16(DDF_Active_in_VD); + ddf->updates_pending = 1; +} + +/* add a device to a container, either while creating it or while + * expanding a pre-existing container + */ +static void add_to_super_ddf(struct supertype *st, + mdu_disk_info_t *dk, int fd, char *devname) +{ + struct ddf_super *ddf = st->sb; + struct dl *dd; + time_t now; + struct tm *tm; + unsigned long long size; + struct phys_disk_entry *pde; + int n, i; + struct stat stb; + + if (ddf->currentconf) { + add_to_super_ddf_bvd(st, dk, fd, devname); + return; + } + + /* This is device numbered dk->number. We need to create + * a phys_disk entry and a more detailed disk_data entry. + */ + fstat(fd, &stb); + posix_memalign((void**)&dd, 512, + sizeof(*dd) + sizeof(dd->vlist[0]) * ddf->max_part); + dd->major = major(stb.st_rdev); + dd->minor = minor(stb.st_rdev); + dd->devname = devname; + dd->next = ddf->dlist; + dd->fd = fd; + dd->spare = NULL; + + dd->disk.magic = DDF_PHYS_DATA_MAGIC; + now = time(0); + tm = localtime(&now); + sprintf(dd->disk.guid, "%8s%04d%02d%02d", + T10, tm->tm_year+1900, tm->tm_mon+1, tm->tm_mday); + *(__u32*)(dd->disk.guid + 16) = random(); + *(__u32*)(dd->disk.guid + 20) = random(); + + do { + /* Cannot be bothered finding a CRC of some irrelevant details*/ + dd->disk.refnum = random(); + for (i = __be16_to_cpu(ddf->active->max_pd_entries) - 1; + i >= 0; i--) + if (ddf->phys->entries[i].refnum == dd->disk.refnum) + break; + } while (i >= 0); + + dd->disk.forced_ref = 1; + dd->disk.forced_guid = 1; + memset(dd->disk.vendor, ' ', 32); + memcpy(dd->disk.vendor, "Linux", 5); + memset(dd->disk.pad, 0xff, 442); + for (i = 0; i < ddf->max_part ; i++) + dd->vlist[i] = NULL; + + n = __be16_to_cpu(ddf->phys->used_pdes); + pde = &ddf->phys->entries[n]; + dd->pdnum = n; + + n++; + ddf->phys->used_pdes = __cpu_to_be16(n); + + memcpy(pde->guid, dd->disk.guid, DDF_GUID_LEN); + pde->refnum = dd->disk.refnum; + pde->type = __cpu_to_be16(DDF_Forced_PD_GUID | DDF_Global_Spare); + pde->state = __cpu_to_be16(DDF_Online); + get_dev_size(fd, NULL, &size); + /* We are required to reserve 32Meg, and record the size in sectors */ + pde->config_size = __cpu_to_be64( (size - 32*1024*1024) / 512); + sprintf(pde->path, "%17.17s","Information: nil") ; + memset(pde->pad, 0xff, 6); + + dd->size = size >> 9; + ddf->dlist = dd; + ddf->updates_pending = 1; +} + +/* + * This is the write_init_super method for a ddf container. It is + * called when creating a container or adding another device to a + * container. + */ + +#ifndef MDASSEMBLE + +static unsigned char null_conf[4096+512]; + +static int __write_init_super_ddf(struct supertype *st, int do_close) +{ + + struct ddf_super *ddf = st->sb; + int i; + struct dl *d; + int n_config; + int conf_size; + + unsigned long long size, sector; + + for (d = ddf->dlist; d; d=d->next) { + int fd = d->fd; + + if (fd < 0) + continue; + + /* We need to fill in the primary, (secondary) and workspace + * lba's in the headers, set their checksums, + * Also checksum phys, virt.... + * + * Then write everything out, finally the anchor is written. + */ + get_dev_size(fd, NULL, &size); + size /= 512; + ddf->anchor.workspace_lba = __cpu_to_be64(size - 32*1024*2); + ddf->anchor.primary_lba = __cpu_to_be64(size - 16*1024*2); + ddf->anchor.seq = __cpu_to_be32(1); + memcpy(&ddf->primary, &ddf->anchor, 512); + memcpy(&ddf->secondary, &ddf->anchor, 512); + + ddf->anchor.openflag = 0xFF; /* 'open' means nothing */ + ddf->anchor.seq = 0xFFFFFFFF; /* no sequencing in anchor */ + ddf->anchor.crc = calc_crc(&ddf->anchor, 512); + + ddf->primary.openflag = 0; + ddf->primary.type = DDF_HEADER_PRIMARY; + + ddf->secondary.openflag = 0; + ddf->secondary.type = DDF_HEADER_SECONDARY; + + ddf->primary.crc = calc_crc(&ddf->primary, 512); + ddf->secondary.crc = calc_crc(&ddf->secondary, 512); + + sector = size - 16*1024*2; + lseek64(fd, sector<<9, 0); + write(fd, &ddf->primary, 512); + + ddf->controller.crc = calc_crc(&ddf->controller, 512); + write(fd, &ddf->controller, 512); + + ddf->phys->crc = calc_crc(ddf->phys, ddf->pdsize); + + write(fd, ddf->phys, ddf->pdsize); + + ddf->virt->crc = calc_crc(ddf->virt, ddf->vdsize); + write(fd, ddf->virt, ddf->vdsize); + + /* Now write lots of config records. */ + n_config = ddf->max_part; + conf_size = ddf->conf_rec_len * 512; + for (i = 0 ; i <= n_config ; i++) { + struct vcl *c = d->vlist[i]; + if (i == n_config) + c = (struct vcl*)d->spare; + + if (c) { + c->conf.crc = calc_crc(&c->conf, conf_size); + write(fd, &c->conf, conf_size); + } else { + char *null_aligned = (char*)((((unsigned long)null_conf)+511)&~511UL); + if (null_conf[0] != 0xff) + memset(null_conf, 0xff, sizeof(null_conf)); + int togo = conf_size; + while (togo > sizeof(null_conf)-512) { + write(fd, null_aligned, sizeof(null_conf)-512); + togo -= sizeof(null_conf)-512; + } + write(fd, null_aligned, togo); + } + } + d->disk.crc = calc_crc(&d->disk, 512); + write(fd, &d->disk, 512); + + /* Maybe do the same for secondary */ + + lseek64(fd, (size-1)*512, SEEK_SET); + write(fd, &ddf->anchor, 512); + if (do_close) { + close(fd); + d->fd = -1; + } + } + return 1; +} + +static int write_init_super_ddf(struct supertype *st) +{ + + if (st->update_tail) { + /* queue the virtual_disk and vd_config as metadata updates */ + struct virtual_disk *vd; + struct vd_config *vc; + struct ddf_super *ddf = st->sb; + int len; + + /* First the virtual disk. We have a slightly fake header */ + len = sizeof(struct virtual_disk) + sizeof(struct virtual_entry); + vd = malloc(len); + *vd = *ddf->virt; + vd->entries[0] = ddf->virt->entries[ddf->currentconf->vcnum]; + vd->populated_vdes = __cpu_to_be16(ddf->currentconf->vcnum); + append_metadata_update(st, vd, len); + + /* Then the vd_config */ + len = ddf->conf_rec_len * 512; + vc = malloc(len); + memcpy(vc, &ddf->currentconf->conf, len); + append_metadata_update(st, vc, len); + + /* FIXME I need to close the fds! */ + return 0; + } else + return __write_init_super_ddf(st, 1); +} + +#endif + +static __u64 avail_size_ddf(struct supertype *st, __u64 devsize) +{ + /* We must reserve the last 32Meg */ + if (devsize <= 32*1024*2) + return 0; + return devsize - 32*1024*2; +} + +#ifndef MDASSEMBLE +static int +validate_geometry_ddf_container(struct supertype *st, + int level, int layout, int raiddisks, + int chunk, unsigned long long size, + char *dev, unsigned long long *freesize, + int verbose); + +static int validate_geometry_ddf_bvd(struct supertype *st, + int level, int layout, int raiddisks, + int chunk, unsigned long long size, + char *dev, unsigned long long *freesize, + int verbose); + +static int validate_geometry_ddf(struct supertype *st, + int level, int layout, int raiddisks, + int chunk, unsigned long long size, + char *dev, unsigned long long *freesize, + int verbose) +{ + int fd; + struct mdinfo *sra; + int cfd; + + /* ddf potentially supports lots of things, but it depends on + * what devices are offered (and maybe kernel version?) + * If given unused devices, we will make a container. + * If given devices in a container, we will make a BVD. + * If given BVDs, we make an SVD, changing all the GUIDs in the process. + */ + + if (level == LEVEL_CONTAINER) { + /* Must be a fresh device to add to a container */ + return validate_geometry_ddf_container(st, level, layout, + raiddisks, chunk, + size, dev, freesize, + verbose); + } + + if (st->sb) { + /* A container has already been opened, so we are + * creating in there. Maybe a BVD, maybe an SVD. + * Should make a distinction one day. + */ + return validate_geometry_ddf_bvd(st, level, layout, raiddisks, + chunk, size, dev, freesize, + verbose); + } + if (!dev) { + /* Initial sanity check. Exclude illegal levels. */ + int i; + for (i=0; ddf_level_num[i].num1 != MAXINT; i++) + if (ddf_level_num[i].num2 == level) + break; + if (ddf_level_num[i].num1 == MAXINT) + return 0; + /* Should check layout? etc */ + return 1; + } + + /* This is the first device for the array. + * If it is a container, we read it in and do automagic allocations, + * no other devices should be given. + * Otherwise it must be a member device of a container, and we + * do manual allocation. + * Later we should check for a BVD and make an SVD. + */ + fd = open(dev, O_RDONLY|O_EXCL, 0); + if (fd >= 0) { + sra = sysfs_read(fd, 0, GET_VERSION); + close(fd); + if (sra && sra->array.major_version == -1 && + strcmp(sra->text_version, "ddf") == 0) { + + /* load super */ + /* find space for 'n' devices. */ + /* remember the devices */ + /* Somehow return the fact that we have enough */ + } + + if (verbose) + fprintf(stderr, + Name ": ddf: Cannot create this array " + "on device %s\n", + dev); + return 0; + } + if (errno != EBUSY || (fd = open(dev, O_RDONLY, 0)) < 0) { + if (verbose) + fprintf(stderr, Name ": ddf: Cannot open %s: %s\n", + dev, strerror(errno)); + return 0; + } + /* Well, it is in use by someone, maybe a 'ddf' container. */ + cfd = open_container(fd); + if (cfd < 0) { + close(fd); + if (verbose) + fprintf(stderr, Name ": ddf: Cannot use %s: %s\n", + dev, strerror(EBUSY)); + return 0; + } + sra = sysfs_read(cfd, 0, GET_VERSION); + close(fd); + if (sra && sra->array.major_version == -1 && + strcmp(sra->text_version, "ddf") == 0) { + /* This is a member of a ddf container. Load the container + * and try to create a bvd + */ + struct ddf_super *ddf; + if (load_super_ddf_all(st, cfd, (void **)&ddf, NULL, 1) == 0) { + st->sb = ddf; + st->container_dev = fd2devnum(cfd); + close(cfd); + return validate_geometry_ddf_bvd(st, level, layout, + raiddisks, chunk, size, + dev, freesize, + verbose); + } + close(cfd); + } else /* device may belong to a different container */ + return 0; + + return 1; +} + +static int +validate_geometry_ddf_container(struct supertype *st, + int level, int layout, int raiddisks, + int chunk, unsigned long long size, + char *dev, unsigned long long *freesize, + int verbose) +{ + int fd; + unsigned long long ldsize; + + if (level != LEVEL_CONTAINER) + return 0; + if (!dev) + return 1; + + fd = open(dev, O_RDONLY|O_EXCL, 0); + if (fd < 0) { + if (verbose) + fprintf(stderr, Name ": ddf: Cannot open %s: %s\n", + dev, strerror(errno)); + return 0; + } + if (!get_dev_size(fd, dev, &ldsize)) { + close(fd); + return 0; + } + close(fd); + + *freesize = avail_size_ddf(st, ldsize >> 9); + + return 1; +} + +static int validate_geometry_ddf_bvd(struct supertype *st, + int level, int layout, int raiddisks, + int chunk, unsigned long long size, + char *dev, unsigned long long *freesize, + int verbose) +{ + struct stat stb; + struct ddf_super *ddf = st->sb; + struct dl *dl; + unsigned long long pos = 0; + unsigned long long maxsize; + struct extent *e; + int i; + /* ddf/bvd supports lots of things, but not containers */ + if (level == LEVEL_CONTAINER) + return 0; + /* We must have the container info already read in. */ + if (!ddf) + return 0; + + if (!dev) { + /* General test: make sure there is space for + * 'raiddisks' device extents of size 'size'. + */ + unsigned long long minsize = size; + int dcnt = 0; + if (minsize == 0) + minsize = 8; + for (dl = ddf->dlist; dl ; dl = dl->next) + { + int found = 0; + pos = 0; + + i = 0; + e = get_extents(ddf, dl); + if (!e) continue; + do { + unsigned long long esize; + esize = e[i].start - pos; + if (esize >= minsize) + found = 1; + pos = e[i].start + e[i].size; + i++; + } while (e[i-1].size); + if (found) + dcnt++; + free(e); + } + if (dcnt < raiddisks) { + if (verbose) + fprintf(stderr, + Name ": ddf: 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 = ddf->dlist ; dl ; dl = dl->next) { + if (dl->major == major(stb.st_rdev) && + dl->minor == minor(stb.st_rdev)) + break; + } + if (!dl) { + if (verbose) + fprintf(stderr, Name ": ddf: %s is not in the " + "same DDF set\n", + dev); + return 0; + } + e = get_extents(ddf, 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); + *freesize = maxsize; + // FIXME here I am + + return 1; +} + +static int load_super_ddf_all(struct supertype *st, int fd, + void **sbp, char *devname, int keep_fd) +{ + struct mdinfo *sra; + struct ddf_super *super; + struct mdinfo *sd, *best = NULL; + int bestseq = 0; + int seq; + char nm[20]; + int dfd; + + sra = sysfs_read(fd, 0, 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, "ddf") != 0) + return 1; + + if (posix_memalign((void**)&super, 512, sizeof(*super)) != 0) + return 1; + memset(super, 0, sizeof(*super)); + + /* first, try each device, and choose the best ddf */ + for (sd = sra->devs ; sd ; sd = sd->next) { + int rv; + sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor); + dfd = dev_open(nm, O_RDONLY); + if (dfd < 0) + return 2; + rv = load_ddf_headers(dfd, super, NULL); + close(dfd); + if (rv == 0) { + seq = __be32_to_cpu(super->active->seq); + if (super->active->openflag) + seq--; + if (!best || seq > bestseq) { + bestseq = seq; + best = sd; + } + } + } + if (!best) + return 1; + /* OK, load this ddf */ + sprintf(nm, "%d:%d", best->disk.major, best->disk.minor); + dfd = dev_open(nm, O_RDONLY); + if (dfd < 0) + return 1; + load_ddf_headers(dfd, super, NULL); + load_ddf_global(dfd, super, NULL); + close(dfd); + /* Now we need the device-local bits */ + for (sd = sra->devs ; sd ; sd = sd->next) { + sprintf(nm, "%d:%d", sd->disk.major, sd->disk.minor); + dfd = dev_open(nm, keep_fd? O_RDWR : O_RDONLY); + if (dfd < 0) + return 2; + seq = load_ddf_local(dfd, super, NULL, keep_fd); + if (!keep_fd) close(dfd); + } + if (st->subarray[0]) { + struct vcl *v; + + for (v = super->conflist; v; v = v->next) + if (v->vcnum == atoi(st->subarray)) + super->currentconf = v; + if (!super->currentconf) + return 1; + } + *sbp = super; + if (st->ss == NULL) { + st->ss = &super_ddf; + st->minor_version = 0; + st->max_devs = 512; + st->container_dev = fd2devnum(fd); + } + return 0; +} +#endif + +static struct mdinfo *container_content_ddf(struct supertype *st) +{ + /* Given a container loaded by load_super_ddf_all, + * extract information about all the arrays into + * an mdinfo tree. + * + * For each vcl in conflist: create an mdinfo, fill it in, + * then look for matching devices (phys_refnum) in dlist + * and create appropriate device mdinfo. + */ + struct ddf_super *ddf = st->sb; + struct mdinfo *rest = NULL; + struct vcl *vc; + + for (vc = ddf->conflist ; vc ; vc=vc->next) + { + int i; + struct mdinfo *this; + this = malloc(sizeof(*this)); + memset(this, 0, sizeof(*this)); + this->next = rest; + rest = this; + + this->array.level = map_num1(ddf_level_num, vc->conf.prl); + this->array.raid_disks = + __be16_to_cpu(vc->conf.prim_elmnt_count); + this->array.layout = rlq_to_layout(vc->conf.rlq, vc->conf.prl, + this->array.raid_disks); + this->array.md_minor = -1; + this->array.ctime = DECADE + + __be32_to_cpu(*(__u32*)(vc->conf.guid+16)); + this->array.utime = DECADE + + __be32_to_cpu(vc->conf.timestamp); + this->array.chunk_size = 512 << vc->conf.chunk_shift; + + i = vc->vcnum; + if ((ddf->virt->entries[i].state & DDF_state_inconsistent) || + (ddf->virt->entries[i].init_state & DDF_initstate_mask) != + DDF_init_full) { + this->array.state = 0; + this->resync_start = 0; + } else { + this->array.state = 1; + this->resync_start = ~0ULL; + } + memcpy(this->name, ddf->virt->entries[i].name, 32); + this->name[33]=0; + + memset(this->uuid, 0, sizeof(this->uuid)); + this->component_size = __be64_to_cpu(vc->conf.blocks); + this->array.size = this->component_size / 2; + this->container_member = i; + + sprintf(this->text_version, "/%s/%d", + devnum2devname(st->container_dev), + this->container_member); + + for (i=0 ; i < ddf->mppe ; i++) { + struct mdinfo *dev; + struct dl *d; + + if (vc->conf.phys_refnum[i] == 0xFFFFFFFF) + continue; + + this->array.working_disks++; + + for (d = ddf->dlist; d ; d=d->next) + if (d->disk.refnum == vc->conf.phys_refnum[i]) + break; + if (d == NULL) + break; + + dev = malloc(sizeof(*dev)); + memset(dev, 0, sizeof(*dev)); + dev->next = this->devs; + this->devs = dev; + + dev->disk.number = __be32_to_cpu(d->disk.refnum); + dev->disk.major = d->major; + dev->disk.minor = d->minor; + dev->disk.raid_disk = i; + dev->disk.state = (1<<MD_DISK_SYNC)|(1<<MD_DISK_ACTIVE); + + dev->events = __be32_to_cpu(ddf->primary.seq); + dev->data_offset = __be64_to_cpu(vc->lba_offset[i]); + dev->component_size = __be64_to_cpu(vc->conf.blocks); + if (d->devname) + strcpy(dev->name, d->devname); + } + } + return rest; +} + +static int store_zero_ddf(struct supertype *st, int fd) +{ + unsigned long long dsize; + void *buf; + + if (!get_dev_size(fd, NULL, &dsize)) + return 1; + + posix_memalign(&buf, 512, 512); + memset(buf, 0, 512); + + lseek64(fd, dsize-512, 0); + write(fd, buf, 512); + free(buf); + return 0; +} + +static int compare_super_ddf(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 ddf_super *first = st->sb; + struct ddf_super *second = tst->sb; + + if (!first) { + st->sb = tst->sb; + tst->sb = NULL; + return 0; + } + + if (memcmp(first->anchor.guid, second->anchor.guid, DDF_GUID_LEN) != 0) + return 2; + + /* FIXME should I look at anything else? */ + return 0; +} + +/* + * A new array 'a' has been started which claims to be instance 'inst' + * within container 'c'. + * We need to confirm that the array matches the metadata in 'c' so + * that we don't corrupt any metadata. + */ +static int ddf_open_new(struct supertype *c, struct active_array *a, char *inst) +{ + dprintf("ddf: open_new %s\n", inst); + a->info.container_member = atoi(inst); + return 0; +} + +/* + * The array 'a' is to be marked clean in the metadata. + * If '->resync_start' is not ~(unsigned long long)0, then the array is only + * clean up to the point (in sectors). If that cannot be recorded in the + * metadata, then leave it as dirty. + * + * For DDF, we need to clear the DDF_state_inconsistent bit in the + * !global! virtual_disk.virtual_entry structure. + */ +static void ddf_set_array_state(struct active_array *a, int consistent) +{ + struct ddf_super *ddf = a->container->sb; + int inst = a->info.container_member; + int old = ddf->virt->entries[inst].state; + if (consistent) + ddf->virt->entries[inst].state &= ~DDF_state_inconsistent; + else + ddf->virt->entries[inst].state |= DDF_state_inconsistent; + if (old != ddf->virt->entries[inst].state) + ddf->updates_pending = 1; + + old = ddf->virt->entries[inst].init_state; + ddf->virt->entries[inst].init_state &= ~DDF_initstate_mask; + if (a->resync_start == ~0ULL) + ddf->virt->entries[inst].init_state |= DDF_init_full; + else if (a->resync_start == 0) + ddf->virt->entries[inst].init_state |= DDF_init_not; + else + ddf->virt->entries[inst].init_state |= DDF_init_quick; + if (old != ddf->virt->entries[inst].init_state) + ddf->updates_pending = 1; + + dprintf("ddf mark %d %s %llu\n", inst, consistent?"clean":"dirty", + a->resync_start); +} + +/* + * The state of each disk is stored in the global phys_disk structure + * in phys_disk.entries[n].state. + * This makes various combinations awkward. + * - When a device fails in any array, it must be failed in all arrays + * that include a part of this device. + * - When a component is rebuilding, we cannot include it officially in the + * array unless this is the only array that uses the device. + * + * So: when transitioning: + * Online -> failed, just set failed flag. monitor will propagate + * spare -> online, the device might need to be added to the array. + * spare -> failed, just set failed. Don't worry if in array or not. + */ +static void ddf_set_disk(struct active_array *a, int n, int state) +{ + struct ddf_super *ddf = a->container->sb; + int inst = a->info.container_member; + struct vd_config *vc = find_vdcr(ddf, inst); + int pd = find_phys(ddf, vc->phys_refnum[n]); + int i, st, working; + + if (vc == NULL) { + dprintf("ddf: cannot find instance %d!!\n", inst); + return; + } + if (pd < 0) { + /* disk doesn't currently exist. If it is now in_sync, + * insert it. */ + if ((state & DS_INSYNC) && ! (state & DS_FAULTY)) { + /* Find dev 'n' in a->info->devs, determine the + * ddf refnum, and set vc->phys_refnum and update + * phys->entries[] + */ + /* FIXME */ + } + } else { + int old = ddf->phys->entries[pd].state; + if (state & DS_FAULTY) + ddf->phys->entries[pd].state |= __cpu_to_be16(DDF_Failed); + if (state & DS_INSYNC) { + ddf->phys->entries[pd].state |= __cpu_to_be16(DDF_Online); + ddf->phys->entries[pd].state &= __cpu_to_be16(~DDF_Rebuilding); + } + if (old != ddf->phys->entries[pd].state) + ddf->updates_pending = 1; + } + + dprintf("ddf: set_disk %d to %x\n", n, state); + + /* Now we need to check the state of the array and update + * virtual_disk.entries[n].state. + * It needs to be one of "optimal", "degraded", "failed". + * I don't understand 'deleted' or 'missing'. + */ + working = 0; + for (i=0; i < a->info.array.raid_disks; i++) { + pd = find_phys(ddf, vc->phys_refnum[i]); + if (pd < 0) + continue; + st = __be16_to_cpu(ddf->phys->entries[pd].state); + if ((st & (DDF_Online|DDF_Failed|DDF_Rebuilding)) + == DDF_Online) + working++; + } + state = DDF_state_degraded; + if (working == a->info.array.raid_disks) + state = DDF_state_optimal; + else switch(vc->prl) { + case DDF_RAID0: + case DDF_CONCAT: + case DDF_JBOD: + state = DDF_state_failed; + break; + case DDF_RAID1: + if (working == 0) + state = DDF_state_failed; + break; + case DDF_RAID4: + case DDF_RAID5: + if (working < a->info.array.raid_disks-1) + state = DDF_state_failed; + break; + case DDF_RAID6: + if (working < a->info.array.raid_disks-2) + state = DDF_state_failed; + else if (working == a->info.array.raid_disks-1) + state = DDF_state_part_optimal; + break; + } + + if (ddf->virt->entries[inst].state != + ((ddf->virt->entries[inst].state & ~DDF_state_mask) + | state)) { + + ddf->virt->entries[inst].state = + (ddf->virt->entries[inst].state & ~DDF_state_mask) + | state; + ddf->updates_pending = 1; + } + +} + +static void ddf_sync_metadata(struct supertype *st) +{ + + /* + * Write all data to all devices. + * Later, we might be able to track whether only local changes + * have been made, or whether any global data has been changed, + * but ddf is sufficiently weird that it probably always + * changes global data .... + */ + struct ddf_super *ddf = st->sb; + if (!ddf->updates_pending) + return; + ddf->updates_pending = 0; + __write_init_super_ddf(st, 0); + dprintf("ddf: sync_metadata\n"); +} + +static void ddf_process_update(struct supertype *st, + struct metadata_update *update) +{ + /* Apply this update to the metadata. + * The first 4 bytes are a DDF_*_MAGIC which guides + * our actions. + * Possible update are: + * DDF_PHYS_RECORDS_MAGIC + * Add a new physical device. Changes to this record + * only happen implicitly. + * used_pdes is the device number. + * DDF_VIRT_RECORDS_MAGIC + * Add a new VD. Possibly also change the 'access' bits. + * populated_vdes is the entry number. + * DDF_VD_CONF_MAGIC + * New or updated VD. the VIRT_RECORD must already + * exist. For an update, phys_refnum and lba_offset + * (at least) are updated, and the VD_CONF must + * be written to precisely those devices listed with + * a phys_refnum. + * DDF_SPARE_ASSIGN_MAGIC + * replacement Spare Assignment Record... but for which device? + * + * So, e.g.: + * - to create a new array, we send a VIRT_RECORD and + * a VD_CONF. Then assemble and start the array. + * - to activate a spare we send a VD_CONF to add the phys_refnum + * and offset. This will also mark the spare as active with + * a spare-assignment record. + */ + struct ddf_super *ddf = st->sb; + __u32 *magic = (__u32*)update->buf; + struct phys_disk *pd; + struct virtual_disk *vd; + struct vd_config *vc; + struct vcl *vcl; + struct dl *dl; + int mppe; + int ent; + + dprintf("Process update %x\n", *magic); + + switch (*magic) { + case DDF_PHYS_RECORDS_MAGIC: + + if (update->len != (sizeof(struct phys_disk) + + sizeof(struct phys_disk_entry))) + return; + pd = (struct phys_disk*)update->buf; + + ent = __be16_to_cpu(pd->used_pdes); + if (ent >= __be16_to_cpu(ddf->phys->max_pdes)) + return; + if (!all_ff(ddf->phys->entries[ent].guid)) + return; + ddf->phys->entries[ent] = pd->entries[0]; + ddf->phys->used_pdes = __cpu_to_be16(1 + + __be16_to_cpu(ddf->phys->used_pdes)); + ddf->updates_pending = 1; + break; + + case DDF_VIRT_RECORDS_MAGIC: + + if (update->len != (sizeof(struct virtual_disk) + + sizeof(struct virtual_entry))) + return; + vd = (struct virtual_disk*)update->buf; + + ent = __be16_to_cpu(vd->populated_vdes); + if (ent >= __be16_to_cpu(ddf->virt->max_vdes)) + return; + if (!all_ff(ddf->virt->entries[ent].guid)) + return; + ddf->virt->entries[ent] = vd->entries[0]; + ddf->virt->populated_vdes = __cpu_to_be16(1 + + __be16_to_cpu(ddf->virt->populated_vdes)); + ddf->updates_pending = 1; + break; + + case DDF_VD_CONF_MAGIC: + dprintf("len %d %d\n", update->len, ddf->conf_rec_len); + + mppe = __be16_to_cpu(ddf->anchor.max_primary_element_entries); + if (update->len != ddf->conf_rec_len * 512) + return; + vc = (struct vd_config*)update->buf; + for (vcl = ddf->conflist; vcl ; vcl = vcl->next) + if (memcmp(vcl->conf.guid, vc->guid, DDF_GUID_LEN) == 0) + break; + dprintf("vcl = %p\n", vcl); + if (vcl) { + /* An update, just copy the phys_refnum and lba_offset + * fields + */ + memcpy(vcl->conf.phys_refnum, vc->phys_refnum, + mppe * (sizeof(__u32) + sizeof(__u64))); + } else { + /* A new VD_CONF */ + vcl = update->space; + update->space = NULL; + vcl->next = ddf->conflist; + memcpy(&vcl->conf, vc, update->len); + vcl->lba_offset = (__u64*) + &vcl->conf.phys_refnum[mppe]; + ddf->conflist = vcl; + } + /* Now make sure vlist is correct for each dl. */ + for (dl = ddf->dlist; dl; dl = dl->next) { + int dn; + int vn = 0; + for (vcl = ddf->conflist; vcl ; vcl = vcl->next) + for (dn=0; dn < ddf->mppe ; dn++) + if (vcl->conf.phys_refnum[dn] == + dl->disk.refnum) { + dprintf("dev %d has %p at %d\n", + dl->pdnum, vcl, vn); + dl->vlist[vn++] = vcl; + break; + } + while (vn < ddf->max_part) + dl->vlist[vn++] = NULL; + if (dl->vlist[0]) { + ddf->phys->entries[dl->pdnum].type &= + ~__cpu_to_be16(DDF_Global_Spare); + ddf->phys->entries[dl->pdnum].type |= + __cpu_to_be16(DDF_Active_in_VD); + } + if (dl->spare) { + ddf->phys->entries[dl->pdnum].type &= + ~__cpu_to_be16(DDF_Global_Spare); + ddf->phys->entries[dl->pdnum].type |= + __cpu_to_be16(DDF_Spare); + } + if (!dl->vlist[0] && !dl->spare) { + ddf->phys->entries[dl->pdnum].type |= + __cpu_to_be16(DDF_Global_Spare); + ddf->phys->entries[dl->pdnum].type &= + ~__cpu_to_be16(DDF_Spare | + DDF_Active_in_VD); + } + } + ddf->updates_pending = 1; + break; + case DDF_SPARE_ASSIGN_MAGIC: + default: break; + } +} + +static void ddf_prepare_update(struct supertype *st, + struct metadata_update *update) +{ + /* This update arrived at managemon. + * We are about to pass it to monitor. + * If a malloc is needed, do it here. + */ + struct ddf_super *ddf = st->sb; + __u32 *magic = (__u32*)update->buf; + if (*magic == DDF_VD_CONF_MAGIC) + posix_memalign(&update->space, 512, + offsetof(struct vcl, conf) + + ddf->conf_rec_len * 512); +} + +/* + * Check if the array 'a' is degraded but not failed. + * If it is, find as many spares as are available and needed and + * arrange for their inclusion. + * We only choose devices which are not already in the array, + * and prefer those with a spare-assignment to this array. + * otherwise we choose global spares - assuming always that + * there is enough room. + * For each spare that we assign, we return an 'mdinfo' which + * describes the position for the device in the array. + * We also add to 'updates' a DDF_VD_CONF_MAGIC update with + * the new phys_refnum and lba_offset values. + * + * Only worry about BVDs at the moment. + */ +static struct mdinfo *ddf_activate_spare(struct active_array *a, + struct metadata_update **updates) +{ + int working = 0; + struct mdinfo *d; + struct ddf_super *ddf = a->container->sb; + int global_ok = 0; + struct mdinfo *rv = NULL; + struct mdinfo *di; + struct metadata_update *mu; + struct dl *dl; + int i; + struct vd_config *vc; + __u64 *lba; + + 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) + working ++; + } + + dprintf("ddf_activate: working=%d (%d) level=%d\n", working, a->info.array.raid_disks, + a->info.array.level); + if (working == a->info.array.raid_disks) + return NULL; /* array not degraded */ + switch (a->info.array.level) { + case 1: + if (working == 0) + return NULL; /* failed */ + break; + case 4: + case 5: + if (working < a->info.array.raid_disks - 1) + return NULL; /* failed */ + break; + case 6: + if (working < a->info.array.raid_disks - 2) + return NULL; /* failed */ + break; + default: /* concat or stripe */ + return NULL; /* failed */ + } + + /* For each slot, if it is not working, find a spare */ + dl = ddf->dlist; + 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. Find a spare */ + again: + for ( ; dl ; dl = dl->next) { + unsigned long long esize; + unsigned long long pos; + struct mdinfo *d2; + int is_global = 0; + int is_dedicated = 0; + struct extent *ex; + int j; + /* If in this array, skip */ + for (d2 = a->info.devs ; d2 ; d2 = d2->next) + if (d2->disk.major == dl->major && + d2->disk.minor == dl->minor) { + dprintf("%x:%x already in array\n", dl->major, dl->minor); + break; + } + if (d2) + continue; + if (ddf->phys->entries[dl->pdnum].type & + __cpu_to_be16(DDF_Spare)) { + /* Check spare assign record */ + if (dl->spare) { + if (dl->spare->type & DDF_spare_dedicated) { + /* check spare_ents for guid */ + for (j = 0 ; + j < __be16_to_cpu(dl->spare->populated); + j++) { + if (memcmp(dl->spare->spare_ents[j].guid, + ddf->virt->entries[a->info.container_member].guid, + DDF_GUID_LEN) == 0) + is_dedicated = 1; + } + } else + is_global = 1; + } + } else if (ddf->phys->entries[dl->pdnum].type & + __cpu_to_be16(DDF_Global_Spare)) { + is_global = 1; + } + if ( ! (is_dedicated || + (is_global && global_ok))) { + dprintf("%x:%x not suitable: %d %d\n", dl->major, dl->minor, + is_dedicated, is_global); + continue; + } + + /* We are allowed to use this device - is there space? + * We need a->info.component_size sectors */ + ex = get_extents(ddf, dl); + if (!ex) { + dprintf("cannot get extents\n"); + continue; + } + j = 0; pos = 0; + esize = 0; + + do { + esize = ex[j].start - pos; + if (esize >= a->info.component_size) + break; + pos = ex[i].start + ex[i].size; + i++; + } while (ex[i-1].size); + + free(ex); + if (esize < a->info.component_size) { + dprintf("%x:%x has no room: %llu %llu\n", dl->major, dl->minor, + esize, a->info.component_size); + /* No room */ + continue; + } + + /* Cool, we have a device with some space at pos */ + di = malloc(sizeof(*di)); + memset(di, 0, sizeof(*di)); + di->disk.number = i; + di->disk.raid_disk = i; + di->disk.major = dl->major; + di->disk.minor = dl->minor; + di->disk.state = 0; + di->data_offset = pos; + di->component_size = a->info.component_size; + di->container_member = dl->pdnum; + di->next = rv; + rv = di; + dprintf("%x:%x to be %d at %llu\n", dl->major, dl->minor, + i, pos); + + break; + } + if (!dl && ! global_ok) { + /* not enough dedicated spares, try global */ + global_ok = 1; + dl = ddf->dlist; + goto again; + } + } + + if (!rv) + /* No spares found */ + return rv; + /* Now 'rv' has a list of devices to return. + * Create a metadata_update record to update the + * phys_refnum and lba_offset values + */ + mu = malloc(sizeof(*mu)); + mu->buf = malloc(ddf->conf_rec_len * 512); + posix_memalign(&mu->space, 512, sizeof(struct vcl)); + mu->len = ddf->conf_rec_len; + mu->next = *updates; + vc = find_vdcr(ddf, a->info.container_member); + memcpy(mu->buf, vc, ddf->conf_rec_len * 512); + + vc = (struct vd_config*)mu->buf; + lba = (__u64*)&vc->phys_refnum[ddf->mppe]; + for (di = rv ; di ; di = di->next) { + vc->phys_refnum[di->disk.raid_disk] = + ddf->phys->entries[dl->pdnum].refnum; + lba[di->disk.raid_disk] = di->data_offset; + } + *updates = mu; + return rv; +} + +struct superswitch super_ddf = { +#ifndef MDASSEMBLE + .examine_super = examine_super_ddf, + .brief_examine_super = brief_examine_super_ddf, + .detail_super = detail_super_ddf, + .brief_detail_super = brief_detail_super_ddf, + .validate_geometry = validate_geometry_ddf, + .write_init_super = write_init_super_ddf, +#endif + .match_home = match_home_ddf, + .uuid_from_super= uuid_from_super_ddf, + .getinfo_super = getinfo_super_ddf, + .update_super = update_super_ddf, + + .avail_size = avail_size_ddf, + + .compare_super = compare_super_ddf, + + .load_super = load_super_ddf, + .init_super = init_super_ddf, + .store_super = store_zero_ddf, + .free_super = free_super_ddf, + .match_metadata_desc = match_metadata_desc_ddf, + .add_to_super = add_to_super_ddf, + .container_content = container_content_ddf, + + .external = 1, + +/* for mdmon */ + .open_new = ddf_open_new, + .set_array_state= ddf_set_array_state, + .set_disk = ddf_set_disk, + .sync_metadata = ddf_sync_metadata, + .process_update = ddf_process_update, + .prepare_update = ddf_prepare_update, + .activate_spare = ddf_activate_spare, + +}; |