/* * mdadm - manage Linux "md" devices aka RAID arrays. * * Copyright (C) 2006-2009 Neil Brown * * * 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: * * 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 /* 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; void *mdupdate; /* hold metadata update */ /* These fields used by auto-layout */ int raiddisk; /* slot to fill in autolayout */ __u64 esize; }; }; struct disk_data disk; struct vcl *vlist[0]; /* max_part in size */ } *dlist, *add_list; }; #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; /* The crc is store (like everything) bigendian, so convert * here for simplicity */ return __cpu_to_be32(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 if (posix_memalign(&buf, 512, len<<9) != 0) buf = NULL; 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 confsec; int vnum; int max_virt_disks = __be16_to_cpu(super->active->max_vd_entries); unsigned long long dsize; /* First the local disk info */ if (posix_memalign((void**)&dl, 512, sizeof(*dl) + (super->max_part) * sizeof(dl->vlist[0])) != 0) { fprintf(stderr, Name ": %s could not allocate disk info buffer\n", __func__); return 1; } 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 (confsec = 0; confsec < __be32_to_cpu(super->active->config_section_length); confsec += super->conf_rec_len) { struct vd_config *vd = (struct vd_config *)((char*)conf + confsec*512); struct vcl *vcl; if (vd->magic == DDF_SPARE_ASSIGN_MAGIC) { if (dl->spare) continue; if (posix_memalign((void**)&dl->spare, 512, super->conf_rec_len*512) != 0) { fprintf(stderr, Name ": %s could not allocate spare info buf\n", __func__); return 1; } 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 { if (posix_memalign((void**)&vcl, 512, (super->conf_rec_len*512 + offsetof(struct vcl, conf))) != 0) { fprintf(stderr, Name ": %s could not allocate vcl buf\n", __func__); return 1; } 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 void free_super_ddf(struct supertype *st); 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; if (test_partition(fd)) /* DDF is not allowed on partitions */ 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; } free_super_ddf(st); 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; } rv = load_ddf_local(fd, super, devname, 0); if (rv) { if (devname) fprintf(stderr, Name ": Failed to load all information " "sections on %s\n", devname); free(super); return rv; } 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) { free(super); return 1; } } /* Should possibly check the sections .... */ st->sb = super; if (st->ss == NULL) { st->ss = &super_ddf; st->minor_version = 0; st->max_devs = 512; } st->loaded_container = 0; 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; } 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; } #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= 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) { int i; 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, __be16_to_cpu(vc->prim_elmnt_count)); for (i=0; i<__be16_to_cpu(vc->prim_elmnt_count); i++) { int j; int cnt = __be16_to_cpu(sb->phys->used_pdes); for (j=0; jphys_refnum[i] == sb->phys->entries[j].refnum) break; if (i) printf(" "); if (j < cnt) printf("%d", j); else printf("--"); } printf(")\n"); if (vc->chunk_shift != 255) 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, (unsigned long long)__be64_to_cpu(vc->blocks)/2); printf(" Array Size[%d] : %llu\n", n, (unsigned long long)__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; ivirt->entries[i]; printf("\n"); 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); printf(" Number RefNo Size Device Type/State\n"); for (i=0 ; iphys->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(" %3d %08x ", i, __be32_to_cpu(pd->refnum)); printf("%8lluK ", (unsigned long long)__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("%-15s", dv); break; } } } if (!dl) printf("%15s",""); printf(" %s%s%s%s%s", (type&2) ? "active":"", (type&4) ? "Global-Spare":"", (type&8) ? "spare" : "", (type&16)? ", foreign" : "", (type&32)? "pass-through" : ""); printf("/%s%s%s%s%s%s%s", (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("\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 getinfo_super_ddf(struct supertype *st, struct mdinfo *info); static void uuid_from_super_ddf(struct supertype *st, int uuid[4]); static void brief_examine_super_ddf(struct supertype *st, int verbose) { /* We just write a generic DDF ARRAY entry */ struct mdinfo info; char nbuf[64]; getinfo_super_ddf(st, &info); fname_from_uuid(st, &info, nbuf, ':'); printf("ARRAY metadata=ddf UUID=%s\n", nbuf + 5); } static void brief_examine_subarrays_ddf(struct supertype *st, int verbose) { /* We just write a generic DDF ARRAY entry */ struct ddf_super *ddf = st->sb; struct mdinfo info; int i; char nbuf[64]; getinfo_super_ddf(st, &info); fname_from_uuid(st, &info, nbuf, ':'); for (i=0; i<__be16_to_cpu(ddf->virt->max_vdes); i++) { struct virtual_entry *ve = &ddf->virt->entries[i]; struct vcl vcl; char nbuf1[64]; if (all_ff(ve->guid)) continue; memcpy(vcl.conf.guid, ve->guid, DDF_GUID_LEN); ddf->currentconf =&vcl; uuid_from_super_ddf(st, info.uuid); fname_from_uuid(st, &info, nbuf1, ':'); printf("ARRAY container=%s member=%d UUID=%s\n", nbuf+5, i, nbuf1+5); } } static void export_examine_super_ddf(struct supertype *st) { struct mdinfo info; char nbuf[64]; getinfo_super_ddf(st, &info); fname_from_uuid(st, &info, nbuf, ':'); printf("MD_METADATA=ddf\n"); printf("MD_LEVEL=container\n"); printf("MD_UUID=%s\n", nbuf+5); } 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; struct mdinfo info; char nbuf[64]; getinfo_super_ddf(st, &info); fname_from_uuid(st, &info, nbuf,':'); printf(" UUID=%s", nbuf + 5); } #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; if (!homehost) return 0; 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); } #ifndef MDASSEMBLE 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; } #endif 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 * 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 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; char *guid; char buf[20]; struct sha1_ctx ctx; if (vcl) guid = vcl->conf.guid; else guid = ddf->anchor.guid; sha1_init_ctx(&ctx); sha1_process_bytes(guid, DDF_GUID_LEN, &ctx); sha1_finish_ctx(&ctx, buf); memcpy(uuid, buf, 4*4); } 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->container_enough = 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 = -1; // info->disk.raid_disk = find refnum in the table and use index; } info->disk.state = (1 << MD_DISK_SYNC) | (1 << MD_DISK_ACTIVE); info->recovery_start = MaxSector; info->reshape_active = 0; info->name[0] = 0; info->array.major_version = -1; info->array.minor_version = -2; strcpy(info->text_version, "ddf"); info->safe_mode_delay = 0; uuid_from_super_ddf(st, info->uuid); } 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; int j; struct dl *dl; /* 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; info->custom_array_size = 0; 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); } for (dl = ddf->dlist; dl ; dl = dl->next) if (dl->raiddisk == info->disk.raid_disk) break; info->disk.major = 0; info->disk.minor = 0; if (dl) { info->disk.major = dl->major; info->disk.minor = dl->minor; } // 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->recovery_start = MaxSector; info->resync_start = 0; info->reshape_active = 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 = MaxSector; uuid_from_super_ddf(st, info->uuid); info->container_member = atoi(st->subarray); info->array.major_version = -1; info->array.minor_version = -2; sprintf(info->text_version, "/%s/%s", devnum2devname(st->container_dev), st->subarray); info->safe_mode_delay = 200; memcpy(info->name, ddf->virt->entries[info->container_member].name, 16); info->name[16]=0; for(j=0; j<16; j++) if (info->name[j] == ' ') info->name[j] = 0; } 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; /* 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); stamp = random32(); memcpy(guid+20, &stamp, 4); } 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 (st->sb) return init_super_ddf_bvd(st, info, size, name, homehost, uuid); if (posix_memalign((void**)&ddf, 512, sizeof(*ddf)) != 0) { fprintf(stderr, Name ": %s could not allocate superblock\n", __func__); return 0; } memset(ddf, 0, sizeof(*ddf)); ddf->dlist = NULL; /* no physical disks yet */ ddf->conflist = NULL; /* No virtual disks yet */ st->sb = ddf; if (info == NULL) { /* zeroing superblock */ return 0; } /* 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); if (homehost && strlen(homehost) < 440) strcpy((char*)ddf->controller.vendor_data, homehost); if (posix_memalign((void**)&pd, 512, pdsize) != 0) { fprintf(stderr, Name ": %s could not allocate pd\n", __func__); return 0; } ddf->phys = pd; ddf->pdsize = pdsize; memset(pd, 0xff, pdsize); memset(pd, 0, sizeof(*pd)); pd->magic = DDF_PHYS_RECORDS_MAGIC; pd->used_pdes = __cpu_to_be16(0); pd->max_pdes = __cpu_to_be16(max_phys_disks); memset(pd->pad, 0xff, 52); if (posix_memalign((void**)&vd, 512, vdsize) != 0) { fprintf(stderr, Name ": %s could not allocate vd\n", __func__); return 0; } 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; ientries[i], 0xff, sizeof(struct virtual_entry)); st->sb = ddf; ddf->updates_pending = 1; 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: switch(layout) { case ALGORITHM_LEFT_ASYMMETRIC: return DDF_RAID5_N_RESTART; case ALGORITHM_RIGHT_ASYMMETRIC: return DDF_RAID5_0_RESTART; case ALGORITHM_LEFT_SYMMETRIC: return DDF_RAID5_N_CONTINUE; case ALGORITHM_RIGHT_SYMMETRIC: return -1; /* not mentioned in standard */ } case 6: switch(layout) { case ALGORITHM_ROTATING_N_RESTART: return DDF_RAID5_N_RESTART; case ALGORITHM_ROTATING_ZERO_RESTART: return DDF_RAID6_0_RESTART; case ALGORITHM_ROTATING_N_CONTINUE: return DDF_RAID5_N_CONTINUE; } } 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_ROTATING_N_RESTART; case DDF_RAID6_0_RESTART: return ALGORITHM_ROTATING_ZERO_RESTART; case DDF_RAID5_N_CONTINUE: return ALGORITHM_ROTATING_N_CONTINUE; default: return -1; } } return -1; } #ifndef MDASSEMBLE 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; } #endif 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 */ if (posix_memalign((void**)&vcl, 512, (offsetof(struct vcl, conf) + ddf->conf_rec_len * 512)) != 0) { fprintf(stderr, Name ": %s could not allocate vd_config\n", __func__); return 0; } 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, 0x00, 8*ddf->mppe); vcl->next = ddf->conflist; ddf->conflist = vcl; ddf->currentconf = vcl; ddf->updates_pending = 1; return 1; } #ifndef MDASSEMBLE 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. * * Alternately: fd == -1 and we have already chosen which device to * use and recorded in dlist->raid_disk; */ 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; if (fd == -1) { for (dl = ddf->dlist; dl ; dl = dl->next) if (dl->raiddisk == dk->raid_disk) break; } else { for (dl = ddf->dlist; dl ; dl = dl->next) if (dl->major == dk->major && dl->minor == dk->minor) break; } if (!dl || ! (dk->state & (1<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; if (fd >= 0) dl->fd = fd; if (devname) 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 int 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 0; } /* This is device numbered dk->number. We need to create * a phys_disk entry and a more detailed disk_data entry. */ fstat(fd, &stb); if (posix_memalign((void**)&dd, 512, sizeof(*dd) + sizeof(dd->vlist[0]) * ddf->max_part) != 0) { fprintf(stderr, Name ": %s could allocate buffer for new disk, aborting\n", __func__); return 1; } dd->major = major(stb.st_rdev); dd->minor = minor(stb.st_rdev); dd->devname = devname; 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) = random32(); *(__u32*)(dd->disk.guid + 20) = random32(); do { /* Cannot be bothered finding a CRC of some irrelevant details*/ dd->disk.refnum = random32(); 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; if (st->update_tail) { int len = (sizeof(struct phys_disk) + sizeof(struct phys_disk_entry)); struct phys_disk *pd; pd = malloc(len); pd->magic = DDF_PHYS_RECORDS_MAGIC; pd->used_pdes = __cpu_to_be16(n); pde = &pd->entries[0]; dd->mdupdate = pd; } else { 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; if (st->update_tail) { dd->next = ddf->add_list; ddf->add_list = dd; } else { dd->next = ddf->dlist; ddf->dlist = dd; ddf->updates_pending = 1; } return 0; } /* * 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. */ 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; int attempts = 0; int successes = 0; unsigned long long size, sector; /* try to write updated metadata, * if we catch a failure move on to the next disk */ for (d = ddf->dlist; d; d=d->next) { int fd = d->fd; if (fd < 0) continue; attempts++; /* 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); if (write(fd, &ddf->primary, 512) < 0) continue; ddf->controller.crc = calc_crc(&ddf->controller, 512); if (write(fd, &ddf->controller, 512) < 0) continue; ddf->phys->crc = calc_crc(ddf->phys, ddf->pdsize); if (write(fd, ddf->phys, ddf->pdsize) < 0) continue; ddf->virt->crc = calc_crc(ddf->virt, ddf->vdsize); if (write(fd, ddf->virt, ddf->vdsize) < 0) continue; /* 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); if (write(fd, &c->conf, conf_size) < 0) break; } 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) { if (write(fd, null_aligned, sizeof(null_conf)-512) < 0) break; togo -= sizeof(null_conf)-512; } if (write(fd, null_aligned, togo) < 0) break; } } if (i <= n_config) continue; d->disk.crc = calc_crc(&d->disk, 512); if (write(fd, &d->disk, 512) < 0) continue; /* Maybe do the same for secondary */ lseek64(fd, (size-1)*512, SEEK_SET); if (write(fd, &ddf->anchor, 512) < 0) continue; successes++; } if (do_close) for (d = ddf->dlist; d; d=d->next) { close(d->fd); d->fd = -1; } return attempts != successes; } static int write_init_super_ddf(struct supertype *st) { struct ddf_super *ddf = st->sb; struct vcl *currentconf = ddf->currentconf; /* we are done with currentconf reset it to point st at the container */ ddf->currentconf = NULL; if (st->update_tail) { /* queue the virtual_disk and vd_config as metadata updates */ struct virtual_disk *vd; struct vd_config *vc; int len; if (!currentconf) { int len = (sizeof(struct phys_disk) + sizeof(struct phys_disk_entry)); /* adding a disk to the container. */ if (!ddf->add_list) return 0; append_metadata_update(st, ddf->add_list->mdupdate, len); ddf->add_list->mdupdate = NULL; return 0; } /* Newly created VD */ /* 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[currentconf->vcnum]; vd->populated_vdes = __cpu_to_be16(currentconf->vcnum); append_metadata_update(st, vd, len); /* Then the vd_config */ len = ddf->conf_rec_len * 512; vc = malloc(len); memcpy(vc, ¤tconf->conf, len); append_metadata_update(st, vc, len); /* FIXME I need to close the fds! */ return 0; } else { struct dl *d; for (d = ddf->dlist; d; d=d->next) while (Kill(d->devname, NULL, 0, 1, 1) == 0); 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 reserve_space(struct supertype *st, int raiddisks, unsigned long long size, int chunk, unsigned long long *freesize) { /* Find 'raiddisks' spare extents at least 'size' big (but * only caring about multiples of 'chunk') and remember * them. * If the cannot be found, fail. */ struct dl *dl; struct ddf_super *ddf = st->sb; int cnt = 0; for (dl = ddf->dlist; dl ; dl=dl->next) { dl->raiddisk = -1; dl->esize = 0; } /* Now find largest extent on each device */ for (dl = ddf->dlist ; dl ; dl=dl->next) { struct extent *e = get_extents(ddf, dl); unsigned long long pos = 0; int i = 0; int found = 0; unsigned long long minsize = size; if (size == 0) minsize = chunk; if (!e) continue; do { unsigned long long esize; esize = e[i].start - pos; if (esize >= minsize) { found = 1; minsize = esize; } pos = e[i].start + e[i].size; i++; } while (e[i-1].size); if (found) { cnt++; dl->esize = minsize; } free(e); } if (cnt < raiddisks) { fprintf(stderr, Name ": not enough devices with space to create array.\n"); return 0; /* No enough free spaces large enough */ } if (size == 0) { /* choose the largest size of which there are at least 'raiddisk' */ for (dl = ddf->dlist ; dl ; dl=dl->next) { struct dl *dl2; if (dl->esize <= size) continue; /* This is bigger than 'size', see if there are enough */ cnt = 0; for (dl2 = dl; dl2 ; dl2=dl2->next) if (dl2->esize >= dl->esize) cnt++; if (cnt >= raiddisks) size = dl->esize; } if (chunk) { size = size / chunk; size *= chunk; } *freesize = size; if (size < 32) { fprintf(stderr, Name ": not enough spare devices to create array.\n"); return 0; } } /* We have a 'size' of which there are enough spaces. * We simply do a first-fit */ cnt = 0; for (dl = ddf->dlist ; dl && cnt < raiddisks ; dl=dl->next) { if (dl->esize < size) continue; dl->raiddisk = cnt; cnt++; } 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); 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 (!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) { if (verbose) fprintf(stderr, Name ": DDF does not support level %d arrays\n", level); return 0; } /* Should check layout? etc */ if (st->sb && freesize) { /* --create was given a container to create in. * So we need to check that there are enough * free spaces and return the amount of space. * We may as well remember which drives were * chosen so that add_to_super/getinfo_super * can return them. */ return reserve_space(st, raiddisks, size, chunk, freesize); } return 1; } 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); } /* 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 - a container is required.\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); if (*freesize == 0) return 0; 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) { if (verbose) fprintf(stderr, Name ": DDF cannot create a container within an container\n"); 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; int devnum = fd2devnum(fd); enum sysfs_read_flags flags; flags = GET_LEVEL|GET_VERSION|GET_DEVS|GET_STATE; if (mdmon_running(devnum)) flags |= SKIP_GONE_DEVS; sra = sysfs_read(fd, 0, flags); 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) { int rv; 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; rv = load_ddf_headers(dfd, super, NULL); if (rv == 0) rv = load_ddf_local(dfd, super, NULL, keep_fd); if (!keep_fd) close(dfd); if (rv) return 1; } 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); } st->loaded_container = 1; return 0; } #endif /* MDASSEMBLE */ 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; int j; 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.major_version = -1; this->array.minor_version = -2; 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 = MaxSector; } memcpy(this->name, ddf->virt->entries[i].name, 16); this->name[16]=0; for(j=0; j<16; j++) if (this->name[j] == ' ') this->name[j] = 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; ddf->currentconf = vc; uuid_from_super_ddf(st, this->uuid); ddf->currentconf = NULL; 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) /* Haven't found that one yet, maybe there are others */ continue; 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<recovery_start = MaxSector; 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_super_ddf(struct supertype *st, int fd) { struct ddf_super *ddf = st->sb; unsigned long long dsize; void *buf; int rc; if (!ddf) return 1; /* ->dlist and ->conflist will be set for updates, currently not * supported */ if (ddf->dlist || ddf->conflist) return 1; if (!get_dev_size(fd, NULL, &dsize)) return 1; if (posix_memalign(&buf, 512, 512) != 0) return 1; memset(buf, 0, 512); lseek64(fd, dsize-512, 0); rc = write(fd, buf, 512); free(buf); if (rc < 0) return 1; 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; } #ifndef MDASSEMBLE /* * 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 int 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 == 2) { /* Should check if a recovery should be started FIXME */ consistent = 1; if (!is_resync_complete(&a->info)) consistent = 0; } 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 (is_resync_complete(&a->info)) ddf->virt->entries[inst].init_state |= DDF_init_full; else if (a->info.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->info.resync_start); return consistent; } /* * 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; if (ddf->add_list) { struct active_array *a; struct dl *al = ddf->add_list; ddf->add_list = al->next; al->next = ddf->dlist; ddf->dlist = al; /* As a device has been added, we should check * for any degraded devices that might make * use of this spare */ for (a = st->arrays ; a; a=a->next) a->check_degraded = 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 */ if (!update->space) return; 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) if (posix_memalign(&update->space, 512, offsetof(struct vcl, conf) + ddf->conf_rec_len * 512) != 0) update->space = NULL; } /* * 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)); if (!di) continue; 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->recovery_start = 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)); if (mu && posix_memalign(&mu->space, 512, sizeof(struct vcl)) != 0) { free(mu); mu = NULL; } if (!mu) { while (rv) { struct mdinfo *n = rv->next; free(rv); rv = n; } return NULL; } mu->buf = malloc(ddf->conf_rec_len * 512); 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; } #endif /* MDASSEMBLE */ static int ddf_level_to_layout(int level) { switch(level) { case 0: case 1: return 0; case 5: return ALGORITHM_LEFT_SYMMETRIC; case 6: return ALGORITHM_ROTATING_N_CONTINUE; case 10: return 0x102; default: return UnSet; } } struct superswitch super_ddf = { #ifndef MDASSEMBLE .examine_super = examine_super_ddf, .brief_examine_super = brief_examine_super_ddf, .brief_examine_subarrays = brief_examine_subarrays_ddf, .export_examine_super = export_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, .add_to_super = add_to_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_super_ddf, .free_super = free_super_ddf, .match_metadata_desc = match_metadata_desc_ddf, .container_content = container_content_ddf, .default_layout = ddf_level_to_layout, .external = 1, #ifndef MDASSEMBLE /* 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, #endif .name = "ddf", };