| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2009 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: <neilb@suse.de> |
| */ |
| |
| #define HAVE_STDINT_H 1 |
| #include "mdadm.h" |
| #include "sha1.h" |
| /* |
| * All handling for the 0.90.0 version superblock is in |
| * this file. |
| * This includes: |
| * - finding, loading, and writing the superblock. |
| * - initialising a new superblock |
| * - printing the superblock for --examine |
| * - printing part of the superblock for --detail |
| * .. other stuff |
| */ |
| |
| static unsigned long calc_sb0_csum(mdp_super_t *super) |
| { |
| unsigned long csum = super->sb_csum; |
| unsigned long newcsum; |
| super->sb_csum= 0 ; |
| newcsum = calc_csum(super, MD_SB_BYTES); |
| super->sb_csum = csum; |
| return newcsum; |
| } |
| |
| static void super0_swap_endian(struct mdp_superblock_s *sb) |
| { |
| /* as super0 superblocks are host-endian, it is sometimes |
| * useful to be able to swap the endianness |
| * as (almost) everything is u32's we byte-swap every 4byte |
| * number. |
| * We then also have to swap the events_hi and events_lo |
| */ |
| char *sbc = (char *)sb; |
| __u32 t32; |
| int i; |
| |
| for (i=0; i < MD_SB_BYTES ; i+=4) { |
| char t = sbc[i]; |
| sbc[i] = sbc[i+3]; |
| sbc[i+3] = t; |
| t=sbc[i+1]; |
| sbc[i+1]=sbc[i+2]; |
| sbc[i+2]=t; |
| } |
| t32 = sb->events_hi; |
| sb->events_hi = sb->events_lo; |
| sb->events_lo = t32; |
| |
| t32 = sb->cp_events_hi; |
| sb->cp_events_hi = sb->cp_events_lo; |
| sb->cp_events_lo = t32; |
| |
| } |
| |
| static void examine_super0(struct supertype *st, char *homehost) |
| { |
| mdp_super_t *sb = st->sb; |
| time_t atime; |
| int d; |
| int delta_extra = 0; |
| char *c; |
| |
| printf(" Magic : %08x\n", sb->md_magic); |
| printf(" Version : %d.%02d.%02d\n", |
| sb->major_version, sb->minor_version, sb->patch_version); |
| if (sb->minor_version >= 90) { |
| printf(" UUID : %08x:%08x:%08x:%08x", sb->set_uuid0, |
| sb->set_uuid1, sb->set_uuid2, sb->set_uuid3); |
| if (homehost) { |
| char buf[20]; |
| void *hash; |
| |
| hash = sha1_buffer(homehost, strlen(homehost), buf); |
| if (memcmp(&sb->set_uuid2, hash, 8) == 0) |
| printf(" (local to host %s)", homehost); |
| } |
| printf("\n"); |
| } else |
| printf(" UUID : %08x\n", sb->set_uuid0); |
| |
| if (sb->not_persistent) |
| printf(" Eedk : not persistent\n"); |
| |
| atime = sb->ctime; |
| printf(" Creation Time : %.24s\n", ctime(&atime)); |
| c = map_num(pers, sb->level); |
| printf(" Raid Level : %s\n", c?c:"-unknown-"); |
| if ((int)sb->level > 0) { |
| int ddsks = 0, ddsks_denom = 1; |
| printf(" Used Dev Size : %d%s\n", sb->size, |
| human_size((long long)sb->size<<10)); |
| switch(sb->level) { |
| case 1: |
| ddsks=1; |
| break; |
| case 4: |
| case 5: |
| ddsks = sb->raid_disks - 1; |
| break; |
| case 6: |
| ddsks = sb->raid_disks - 2; |
| break; |
| case 10: |
| ddsks = sb->raid_disks; |
| ddsks_denom = |
| (sb->layout & 255) * ((sb->layout >> 8) & 255); |
| } |
| if (ddsks) { |
| long long asize = sb->size; |
| asize = (asize << 10) * ddsks / ddsks_denom; |
| printf(" Array Size : %llu%s\n", |
| asize >> 10, human_size(asize)); |
| } |
| } |
| printf(" Raid Devices : %d\n", sb->raid_disks); |
| printf(" Total Devices : %d\n", sb->nr_disks); |
| printf("Preferred Minor : %d\n", sb->md_minor); |
| printf("\n"); |
| if (sb->minor_version > 90 && (sb->reshape_position + 1) != 0) { |
| printf(" Reshape pos'n : %llu%s\n", |
| (unsigned long long)sb->reshape_position / 2, |
| human_size((long long)sb->reshape_position << 9)); |
| if (sb->delta_disks) { |
| printf(" Delta Devices : %d", sb->delta_disks); |
| printf(" (%d->%d)\n", sb->raid_disks-sb->delta_disks, |
| sb->raid_disks); |
| if (((int)sb->delta_disks) < 0) |
| delta_extra = - sb->delta_disks; |
| } |
| if (sb->new_level != sb->level) { |
| c = map_num(pers, sb->new_level); |
| printf(" New Level : %s\n", c?c:"-unknown-"); |
| } |
| if (sb->new_layout != sb->layout) { |
| if (sb->level == 5) { |
| c = map_num(r5layout, sb->new_layout); |
| printf(" New Layout : %s\n", |
| c?c:"-unknown-"); |
| } |
| if (sb->level == 6) { |
| c = map_num(r6layout, sb->new_layout); |
| printf(" New Layout : %s\n", |
| c?c:"-unknown-"); |
| } |
| if (sb->level == 10) { |
| printf(" New Layout : near=%d, %s=%d\n", |
| sb->new_layout&255, |
| (sb->new_layout&0x10000)?"offset":"far", |
| (sb->new_layout>>8)&255); |
| } |
| } |
| if (sb->new_chunk != sb->chunk_size) |
| printf(" New Chunksize : %d\n", sb->new_chunk); |
| printf("\n"); |
| } |
| atime = sb->utime; |
| printf(" Update Time : %.24s\n", ctime(&atime)); |
| printf(" State : %s\n", |
| (sb->state&(1 << MD_SB_CLEAN)) ? "clean":"active"); |
| if (sb->state & (1 << MD_SB_BITMAP_PRESENT)) |
| printf("Internal Bitmap : present\n"); |
| printf(" Active Devices : %d\n", sb->active_disks); |
| printf("Working Devices : %d\n", sb->working_disks); |
| printf(" Failed Devices : %d\n", sb->failed_disks); |
| printf(" Spare Devices : %d\n", sb->spare_disks); |
| if (calc_sb0_csum(sb) == sb->sb_csum) |
| printf(" Checksum : %x - correct\n", sb->sb_csum); |
| else |
| printf(" Checksum : %x - expected %lx\n", |
| sb->sb_csum, calc_sb0_csum(sb)); |
| printf(" Events : %llu\n", |
| ((unsigned long long)sb->events_hi << 32) + sb->events_lo); |
| printf("\n"); |
| if (sb->level == 5) { |
| c = map_num(r5layout, sb->layout); |
| printf(" Layout : %s\n", c?c:"-unknown-"); |
| } |
| if (sb->level == 6) { |
| c = map_num(r6layout, sb->layout); |
| printf(" Layout : %s\n", c?c:"-unknown-"); |
| } |
| if (sb->level == 10) { |
| printf(" Layout :"); |
| print_r10_layout(sb->layout); |
| printf("\n"); |
| } |
| switch(sb->level) { |
| case 0: |
| case 4: |
| case 5: |
| case 6: |
| case 10: |
| printf(" Chunk Size : %dK\n", sb->chunk_size / 1024); |
| break; |
| case -1: |
| printf(" Rounding : %dK\n", sb->chunk_size / 1024); |
| break; |
| default: |
| break; |
| } |
| printf("\n"); |
| printf(" Number Major Minor RaidDevice State\n"); |
| for (d = -1; |
| d < (signed int)(sb->raid_disks + delta_extra + sb->spare_disks); |
| d++) { |
| mdp_disk_t *dp; |
| char *dv; |
| char nb[11]; |
| int wonly, failfast; |
| if (d>=0) dp = &sb->disks[d]; |
| else dp = &sb->this_disk; |
| snprintf(nb, sizeof(nb), "%4d", d); |
| printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb, |
| dp->number, dp->major, dp->minor, dp->raid_disk); |
| wonly = dp->state & (1 << MD_DISK_WRITEMOSTLY); |
| failfast = dp->state & (1<<MD_DISK_FAILFAST); |
| dp->state &= ~(wonly | failfast); |
| if (dp->state & (1 << MD_DISK_FAULTY)) |
| printf(" faulty"); |
| if (dp->state & (1 << MD_DISK_ACTIVE)) |
| printf(" active"); |
| if (dp->state & (1 << MD_DISK_SYNC)) |
| printf(" sync"); |
| if (dp->state & (1 << MD_DISK_REMOVED)) |
| printf(" removed"); |
| if (wonly) |
| printf(" write-mostly"); |
| if (failfast) |
| printf(" failfast"); |
| if (dp->state == 0) |
| printf(" spare"); |
| if ((dv = map_dev(dp->major, dp->minor, 0))) |
| printf(" %s", dv); |
| printf("\n"); |
| if (d == -1) |
| printf("\n"); |
| } |
| } |
| |
| static void brief_examine_super0(struct supertype *st, int verbose) |
| { |
| mdp_super_t *sb = st->sb; |
| char *c=map_num(pers, sb->level); |
| char devname[20]; |
| |
| sprintf(devname, "/dev/md%d", sb->md_minor); |
| |
| if (verbose) { |
| printf("ARRAY %s level=%s num-devices=%d", |
| devname, |
| c?c:"-unknown-", sb->raid_disks); |
| } else |
| printf("ARRAY %s", devname); |
| |
| if (sb->minor_version >= 90) |
| printf(" UUID=%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, |
| sb->set_uuid2, sb->set_uuid3); |
| else |
| printf(" UUID=%08x", sb->set_uuid0); |
| printf("\n"); |
| } |
| |
| static void export_examine_super0(struct supertype *st) |
| { |
| mdp_super_t *sb = st->sb; |
| |
| printf("MD_LEVEL=%s\n", map_num(pers, sb->level)); |
| printf("MD_DEVICES=%d\n", sb->raid_disks); |
| if (sb->minor_version >= 90) |
| printf("MD_UUID=%08x:%08x:%08x:%08x\n", |
| sb->set_uuid0, sb->set_uuid1, |
| sb->set_uuid2, sb->set_uuid3); |
| else |
| printf("MD_UUID=%08x\n", sb->set_uuid0); |
| printf("MD_UPDATE_TIME=%llu\n", |
| __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL); |
| printf("MD_EVENTS=%llu\n", |
| ((unsigned long long)sb->events_hi << 32) |
| + sb->events_lo); |
| } |
| |
| static int copy_metadata0(struct supertype *st, int from, int to) |
| { |
| /* Read 64K from the appropriate offset of 'from' |
| * and if it looks a little like a 0.90 superblock, |
| * write it to the same offset of 'to' |
| */ |
| void *buf; |
| unsigned long long dsize, offset; |
| const int bufsize = 64*1024; |
| mdp_super_t *super; |
| |
| if (posix_memalign(&buf, 4096, bufsize) != 0) |
| return 1; |
| |
| if (!get_dev_size(from, NULL, &dsize)) |
| goto err; |
| |
| if (dsize < MD_RESERVED_SECTORS*512) |
| goto err; |
| |
| offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
| |
| offset *= 512; |
| |
| if (lseek64(from, offset, 0) < 0LL) |
| goto err; |
| if (read(from, buf, bufsize) != bufsize) |
| goto err; |
| |
| if (lseek64(to, offset, 0) < 0LL) |
| goto err; |
| super = buf; |
| if (super->md_magic != MD_SB_MAGIC || |
| super->major_version != 0 || |
| calc_sb0_csum(super) != super->sb_csum) |
| goto err; |
| if (write(to, buf, bufsize) != bufsize) |
| goto err; |
| free(buf); |
| return 0; |
| err: |
| free(buf); |
| return 1; |
| } |
| |
| static void detail_super0(struct supertype *st, char *homehost, char *subarray) |
| { |
| mdp_super_t *sb = st->sb; |
| printf(" UUID : "); |
| if (sb->minor_version >= 90) |
| printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, |
| sb->set_uuid2, sb->set_uuid3); |
| else |
| printf("%08x", sb->set_uuid0); |
| if (homehost) { |
| char buf[20]; |
| void *hash = sha1_buffer(homehost, |
| strlen(homehost), |
| buf); |
| if (memcmp(&sb->set_uuid2, hash, 8)==0) |
| printf(" (local to host %s)", homehost); |
| } |
| printf("\n Events : %d.%d\n\n", sb->events_hi, sb->events_lo); |
| } |
| |
| static void brief_detail_super0(struct supertype *st, char *subarray) |
| { |
| mdp_super_t *sb = st->sb; |
| printf(" UUID="); |
| if (sb->minor_version >= 90) |
| printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1, |
| sb->set_uuid2, sb->set_uuid3); |
| else |
| printf("%08x", sb->set_uuid0); |
| } |
| |
| static int match_home0(struct supertype *st, char *homehost) |
| { |
| mdp_super_t *sb = st->sb; |
| char buf[20]; |
| char *hash; |
| |
| if (!homehost) |
| return 0; |
| hash = sha1_buffer(homehost, |
| strlen(homehost), |
| buf); |
| |
| return (memcmp(&sb->set_uuid2, hash, 8)==0); |
| } |
| |
| static void uuid_from_super0(struct supertype *st, int uuid[4]) |
| { |
| mdp_super_t *super = st->sb; |
| uuid[0] = super->set_uuid0; |
| if (super->minor_version >= 90) { |
| uuid[1] = super->set_uuid1; |
| uuid[2] = super->set_uuid2; |
| uuid[3] = super->set_uuid3; |
| } else { |
| uuid[1] = 0; |
| uuid[2] = 0; |
| uuid[3] = 0; |
| } |
| } |
| |
| static void getinfo_super0(struct supertype *st, struct mdinfo *info, char *map) |
| { |
| mdp_super_t *sb = st->sb; |
| int working = 0; |
| int i; |
| int map_disks = info->array.raid_disks; |
| |
| memset(info, 0, sizeof(*info)); |
| info->array.major_version = sb->major_version; |
| info->array.minor_version = sb->minor_version; |
| info->array.patch_version = sb->patch_version; |
| info->array.raid_disks = sb->raid_disks; |
| info->array.level = sb->level; |
| info->array.layout = sb->layout; |
| info->array.md_minor = sb->md_minor; |
| info->array.ctime = sb->ctime; |
| info->array.utime = sb->utime; |
| info->array.chunk_size = sb->chunk_size; |
| info->array.state = sb->state; |
| info->component_size = sb->size; |
| info->component_size *= 2; |
| |
| if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) |
| info->bitmap_offset = 8; |
| |
| info->disk.state = sb->this_disk.state; |
| info->disk.major = sb->this_disk.major; |
| info->disk.minor = sb->this_disk.minor; |
| info->disk.raid_disk = sb->this_disk.raid_disk; |
| info->disk.number = sb->this_disk.number; |
| |
| info->events = md_event(sb); |
| info->data_offset = 0; |
| |
| sprintf(info->text_version, "0.%d", sb->minor_version); |
| info->safe_mode_delay = 200; |
| |
| uuid_from_super0(st, info->uuid); |
| |
| info->recovery_start = MaxSector; |
| if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) { |
| info->reshape_active = 1; |
| info->reshape_progress = sb->reshape_position; |
| info->new_level = sb->new_level; |
| info->delta_disks = sb->delta_disks; |
| info->new_layout = sb->new_layout; |
| info->new_chunk = sb->new_chunk; |
| if (info->delta_disks < 0) |
| info->array.raid_disks -= info->delta_disks; |
| } else |
| info->reshape_active = 0; |
| |
| info->recovery_blocked = info->reshape_active; |
| |
| sprintf(info->name, "%d", sb->md_minor); |
| /* work_disks is calculated rather than read directly */ |
| for (i=0; i < MD_SB_DISKS; i++) |
| if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) && |
| (sb->disks[i].raid_disk < (unsigned)info->array.raid_disks) && |
| (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) && |
| !(sb->disks[i].state & (1<<MD_DISK_FAULTY))) { |
| working ++; |
| if (map && i < map_disks) |
| map[i] = 1; |
| } else if (map && i < map_disks) |
| map[i] = 0; |
| info->array.working_disks = working; |
| } |
| |
| static struct mdinfo *container_content0(struct supertype *st, char *subarray) |
| { |
| struct mdinfo *info; |
| |
| if (subarray) |
| return NULL; |
| |
| info = xmalloc(sizeof(*info)); |
| getinfo_super0(st, info, NULL); |
| return info; |
| } |
| |
| static int update_super0(struct supertype *st, struct mdinfo *info, |
| char *update, |
| char *devname, int verbose, |
| int uuid_set, char *homehost) |
| { |
| /* NOTE: for 'assemble' and 'force' we need to return non-zero |
| * if any change was made. For others, the return value is |
| * ignored. |
| */ |
| int rv = 0; |
| int uuid[4]; |
| mdp_super_t *sb = st->sb; |
| |
| if (strcmp(update, "homehost") == 0 && |
| homehost) { |
| /* note that 'homehost' is special as it is really |
| * a "uuid" update. |
| */ |
| uuid_set = 0; |
| update = "uuid"; |
| info->uuid[0] = sb->set_uuid0; |
| info->uuid[1] = sb->set_uuid1; |
| } |
| |
| if (strcmp(update, "sparc2.2")==0 ) { |
| /* 2.2 sparc put the events in the wrong place |
| * So we copy the tail of the superblock |
| * up 4 bytes before continuing |
| */ |
| __u32 *sb32 = (__u32*)sb; |
| |
| memmove(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, |
| sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, |
| (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); |
| if (verbose >= 0) |
| pr_err("adjusting superblock of %s for 2.2/sparc compatibility.\n", |
| devname); |
| } else if (strcmp(update, "super-minor") ==0) { |
| sb->md_minor = info->array.md_minor; |
| if (verbose > 0) |
| pr_err("updating superblock of %s with minor number %d\n", |
| devname, info->array.md_minor); |
| } else if (strcmp(update, "summaries") == 0) { |
| unsigned int i; |
| /* set nr_disks, active_disks, working_disks, |
| * failed_disks, spare_disks based on disks[] |
| * array in superblock. |
| * Also make sure extra slots aren't 'failed' |
| */ |
| sb->nr_disks = sb->active_disks = |
| sb->working_disks = sb->failed_disks = |
| sb->spare_disks = 0; |
| for (i=0; i < MD_SB_DISKS ; i++) |
| if (sb->disks[i].major || |
| sb->disks[i].minor) { |
| int state = sb->disks[i].state; |
| if (state & (1<<MD_DISK_REMOVED)) |
| continue; |
| sb->nr_disks++; |
| if (state & (1<<MD_DISK_ACTIVE)) |
| sb->active_disks++; |
| if (state & (1<<MD_DISK_FAULTY)) |
| sb->failed_disks++; |
| else |
| sb->working_disks++; |
| if (state == 0) |
| sb->spare_disks++; |
| } else if (i >= sb->raid_disks && sb->disks[i].number == 0) |
| sb->disks[i].state = 0; |
| } else if (strcmp(update, "force-one")==0) { |
| /* Not enough devices for a working array, so |
| * bring this one up-to-date. |
| */ |
| __u32 ehi = sb->events_hi, elo = sb->events_lo; |
| sb->events_hi = (info->events>>32) & 0xFFFFFFFF; |
| sb->events_lo = (info->events) & 0xFFFFFFFF; |
| if (sb->events_hi != ehi || |
| sb->events_lo != elo) |
| rv = 1; |
| } else if (strcmp(update, "force-array")==0) { |
| /* degraded array and 'force' requested, so |
| * maybe need to mark it 'clean' |
| */ |
| if ((sb->level == 5 || sb->level == 4 || sb->level == 6) && |
| (sb->state & (1 << MD_SB_CLEAN)) == 0) { |
| /* need to force clean */ |
| sb->state |= (1 << MD_SB_CLEAN); |
| rv = 1; |
| } |
| } else if (strcmp(update, "assemble")==0) { |
| int d = info->disk.number; |
| int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY); |
| int failfast = sb->disks[d].state & (1<<MD_DISK_FAILFAST); |
| int mask = (1<<MD_DISK_WRITEMOSTLY)|(1<<MD_DISK_FAILFAST); |
| int add = 0; |
| if (sb->minor_version >= 91) |
| /* During reshape we don't insist on everything |
| * being marked 'sync' |
| */ |
| add = (1<<MD_DISK_SYNC); |
| if (((sb->disks[d].state & ~mask) | add) != |
| (unsigned)info->disk.state) { |
| sb->disks[d].state = info->disk.state | wonly |failfast; |
| rv = 1; |
| } |
| if (info->reshape_active && |
| sb->minor_version > 90 && (sb->reshape_position+1) != 0 && |
| info->delta_disks >= 0 && |
| info->reshape_progress < sb->reshape_position) { |
| sb->reshape_position = info->reshape_progress; |
| rv = 1; |
| } |
| if (info->reshape_active && |
| sb->minor_version > 90 && (sb->reshape_position+1) != 0 && |
| info->delta_disks < 0 && |
| info->reshape_progress > sb->reshape_position) { |
| sb->reshape_position = info->reshape_progress; |
| rv = 1; |
| } |
| } else if (strcmp(update, "linear-grow-new") == 0) { |
| memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); |
| sb->disks[info->disk.number].number = info->disk.number; |
| sb->disks[info->disk.number].major = info->disk.major; |
| sb->disks[info->disk.number].minor = info->disk.minor; |
| sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; |
| sb->disks[info->disk.number].state = info->disk.state; |
| sb->this_disk = sb->disks[info->disk.number]; |
| } else if (strcmp(update, "linear-grow-update") == 0) { |
| sb->raid_disks = info->array.raid_disks; |
| sb->nr_disks = info->array.nr_disks; |
| sb->active_disks = info->array.active_disks; |
| sb->working_disks = info->array.working_disks; |
| memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0])); |
| sb->disks[info->disk.number].number = info->disk.number; |
| sb->disks[info->disk.number].major = info->disk.major; |
| sb->disks[info->disk.number].minor = info->disk.minor; |
| sb->disks[info->disk.number].raid_disk = info->disk.raid_disk; |
| sb->disks[info->disk.number].state = info->disk.state; |
| } else if (strcmp(update, "resync") == 0) { |
| /* make sure resync happens */ |
| sb->state &= ~(1<<MD_SB_CLEAN); |
| sb->recovery_cp = 0; |
| } else if (strcmp(update, "uuid") == 0) { |
| if (!uuid_set && homehost) { |
| char buf[20]; |
| char *hash = sha1_buffer(homehost, |
| strlen(homehost), |
| buf); |
| memcpy(info->uuid+2, hash, 8); |
| } |
| sb->set_uuid0 = info->uuid[0]; |
| sb->set_uuid1 = info->uuid[1]; |
| sb->set_uuid2 = info->uuid[2]; |
| sb->set_uuid3 = info->uuid[3]; |
| if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) { |
| struct bitmap_super_s *bm; |
| bm = (struct bitmap_super_s*)(sb+1); |
| uuid_from_super0(st, uuid); |
| memcpy(bm->uuid, uuid, 16); |
| } |
| } else if (strcmp(update, "metadata") == 0) { |
| /* Create some v1.0 metadata to match ours but make the |
| * ctime bigger. Also update info->array.*_version. |
| * We need to arrange that store_super writes out |
| * the v1.0 metadata. |
| * Not permitted for unclean array, or array with |
| * bitmap. |
| */ |
| if (info->bitmap_offset) { |
| pr_err("Cannot update metadata when bitmap is present\n"); |
| rv = -2; |
| } else if (info->array.state != 1) { |
| pr_err("Cannot update metadata on unclean array\n"); |
| rv = -2; |
| } else { |
| info->array.major_version = 1; |
| info->array.minor_version = 0; |
| uuid_from_super0(st, info->uuid); |
| st->other = super1_make_v0(st, info, st->sb); |
| } |
| } else if (strcmp(update, "revert-reshape") == 0) { |
| rv = -2; |
| if (sb->minor_version <= 90) |
| pr_err("No active reshape to revert on %s\n", |
| devname); |
| else if (sb->delta_disks == 0) |
| pr_err("%s: Can only revert reshape which changes number of devices\n", |
| devname); |
| else { |
| int tmp; |
| int parity = sb->level == 6 ? 2 : 1; |
| rv = 0; |
| |
| if (sb->level >= 4 && sb->level <= 6 && |
| sb->reshape_position % ( |
| sb->new_chunk/512 * |
| (sb->raid_disks - sb->delta_disks - parity))) { |
| pr_err("Reshape position is not suitably aligned.\n"); |
| pr_err("Try normal assembly and stop again\n"); |
| return -2; |
| } |
| sb->raid_disks -= sb->delta_disks; |
| sb->delta_disks = -sb->delta_disks; |
| |
| tmp = sb->new_layout; |
| sb->new_layout = sb->layout; |
| sb->layout = tmp; |
| |
| tmp = sb->new_chunk; |
| sb->new_chunk = sb->chunk_size; |
| sb->chunk_size = tmp; |
| } |
| } else if (strcmp(update, "no-bitmap") == 0) { |
| sb->state &= ~(1<<MD_SB_BITMAP_PRESENT); |
| } else if (strcmp(update, "_reshape_progress")==0) |
| sb->reshape_position = info->reshape_progress; |
| else if (strcmp(update, "writemostly")==0) |
| sb->state |= (1<<MD_DISK_WRITEMOSTLY); |
| else if (strcmp(update, "readwrite")==0) |
| sb->state &= ~(1<<MD_DISK_WRITEMOSTLY); |
| else |
| rv = -1; |
| |
| sb->sb_csum = calc_sb0_csum(sb); |
| return rv; |
| } |
| |
| /* |
| * For version-0 superblock, the homehost is 'stored' in the uuid. |
| * 8 bytes for a hash of the host leaving 8 bytes of random material. |
| * We use the first 8 bytes (64bits) of the sha1 of the host name |
| */ |
| static int init_super0(struct supertype *st, mdu_array_info_t *info, |
| struct shape *s, char *ignored_name, |
| char *homehost, int *uuid, |
| unsigned long long data_offset) |
| { |
| mdp_super_t *sb; |
| int spares; |
| |
| if (data_offset != INVALID_SECTORS) { |
| pr_err("data-offset not support for 0.90\n"); |
| return 0; |
| } |
| |
| if (posix_memalign((void**)&sb, 4096, |
| MD_SB_BYTES + ROUND_UP(sizeof(bitmap_super_t), 4096)) != 0) { |
| pr_err("could not allocate superblock\n"); |
| return 0; |
| } |
| memset(sb, 0, MD_SB_BYTES + sizeof(bitmap_super_t)); |
| |
| st->sb = sb; |
| if (info == NULL) { |
| /* zeroing the superblock */ |
| return 0; |
| } |
| |
| spares = info->working_disks - info->active_disks; |
| if (info->raid_disks + spares > MD_SB_DISKS) { |
| pr_err("too many devices requested: %d+%d > %d\n", |
| info->raid_disks , spares, MD_SB_DISKS); |
| return 0; |
| } |
| |
| sb->md_magic = MD_SB_MAGIC; |
| sb->major_version = 0; |
| sb->minor_version = 90; |
| sb->patch_version = 0; |
| sb->gvalid_words = 0; /* ignored */ |
| sb->ctime = time(0); |
| sb->level = info->level; |
| sb->size = s->size; |
| if (s->size != (unsigned long long)sb->size) |
| return 0; |
| sb->nr_disks = info->nr_disks; |
| sb->raid_disks = info->raid_disks; |
| sb->md_minor = info->md_minor; |
| sb->not_persistent = 0; |
| if (uuid) { |
| sb->set_uuid0 = uuid[0]; |
| sb->set_uuid1 = uuid[1]; |
| sb->set_uuid2 = uuid[2]; |
| sb->set_uuid3 = uuid[3]; |
| } else { |
| __u32 r[4]; |
| random_uuid((__u8 *)r); |
| sb->set_uuid0 = r[0]; |
| sb->set_uuid1 = r[1]; |
| sb->set_uuid2 = r[2]; |
| sb->set_uuid3 = r[3]; |
| } |
| if (homehost && !uuid) { |
| char buf[20]; |
| char *hash = sha1_buffer(homehost, |
| strlen(homehost), |
| buf); |
| memcpy(&sb->set_uuid2, hash, 8); |
| } |
| |
| sb->utime = sb->ctime; |
| sb->state = info->state; |
| sb->active_disks = info->active_disks; |
| sb->working_disks = info->working_disks; |
| sb->failed_disks = info->failed_disks; |
| sb->spare_disks = info->spare_disks; |
| sb->events_hi = 0; |
| sb->events_lo = 1; |
| |
| sb->layout = info->layout; |
| sb->chunk_size = info->chunk_size; |
| |
| return 1; |
| } |
| |
| struct devinfo { |
| int fd; |
| char *devname; |
| mdu_disk_info_t disk; |
| struct devinfo *next; |
| }; |
| |
| /* Add a device to the superblock being created */ |
| static int add_to_super0(struct supertype *st, mdu_disk_info_t *dinfo, |
| int fd, char *devname, unsigned long long data_offset) |
| { |
| mdp_super_t *sb = st->sb; |
| mdp_disk_t *dk = &sb->disks[dinfo->number]; |
| struct devinfo *di, **dip; |
| |
| dk->number = dinfo->number; |
| dk->major = dinfo->major; |
| dk->minor = dinfo->minor; |
| dk->raid_disk = dinfo->raid_disk; |
| dk->state = dinfo->state & ((1<<MD_DISK_ACTIVE) | |
| (1<<MD_DISK_SYNC)); |
| |
| sb->this_disk = sb->disks[dinfo->number]; |
| sb->sb_csum = calc_sb0_csum(sb); |
| |
| dip = (struct devinfo **)&st->info; |
| while (*dip) |
| dip = &(*dip)->next; |
| di = xmalloc(sizeof(struct devinfo)); |
| di->fd = fd; |
| di->devname = devname; |
| di->disk = *dinfo; |
| di->next = NULL; |
| *dip = di; |
| |
| return 0; |
| } |
| |
| static int store_super0(struct supertype *st, int fd) |
| { |
| unsigned long long dsize; |
| unsigned long long offset; |
| mdp_super_t *super = st->sb; |
| |
| if (!get_dev_size(fd, NULL, &dsize)) |
| return 1; |
| |
| if (dsize < MD_RESERVED_SECTORS*512) |
| return 2; |
| |
| if (st->other) { |
| /* Writing out v1.0 metadata for --update=metadata */ |
| int ret = 0; |
| |
| offset = dsize/512 - 8*2; |
| offset &= ~(4*2-1); |
| offset *= 512; |
| if (lseek64(fd, offset, 0)< 0LL) |
| ret = 3; |
| else if (write(fd, st->other, 1024) != 1024) |
| ret = 4; |
| else |
| fsync(fd); |
| free(st->other); |
| st->other = NULL; |
| return ret; |
| } |
| |
| offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
| |
| offset *= 512; |
| |
| if (lseek64(fd, offset, 0)< 0LL) |
| return 3; |
| |
| if (write(fd, super, sizeof(*super)) != sizeof(*super)) |
| return 4; |
| |
| if (super->state & (1<<MD_SB_BITMAP_PRESENT)) { |
| struct bitmap_super_s * bm = (struct bitmap_super_s*)(super+1); |
| if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) |
| if (write(fd, bm, ROUND_UP(sizeof(*bm),4096)) != |
| ROUND_UP(sizeof(*bm),4096)) |
| return 5; |
| } |
| |
| fsync(fd); |
| return 0; |
| } |
| |
| static int write_init_super0(struct supertype *st) |
| { |
| mdp_super_t *sb = st->sb; |
| int rv = 0; |
| struct devinfo *di; |
| |
| for (di = st->info ; di && ! rv ; di = di->next) { |
| |
| if (di->disk.state & (1 << MD_DISK_FAULTY)) |
| continue; |
| if (di->fd == -1) |
| continue; |
| while (Kill(di->devname, NULL, 0, -1, 1) == 0) |
| ; |
| |
| sb->disks[di->disk.number].state &= ~(1<<MD_DISK_FAULTY); |
| |
| sb->this_disk = sb->disks[di->disk.number]; |
| sb->sb_csum = calc_sb0_csum(sb); |
| rv = store_super0(st, di->fd); |
| |
| if (rv == 0 && (sb->state & (1<<MD_SB_BITMAP_PRESENT))) |
| rv = st->ss->write_bitmap(st, di->fd, NoUpdate); |
| |
| if (rv) |
| pr_err("failed to write superblock to %s\n", |
| di->devname); |
| } |
| return rv; |
| } |
| |
| static int compare_super0(struct supertype *st, struct supertype *tst, |
| int verbose) |
| { |
| /* |
| * return: |
| * 0 same, or first was empty, and second was copied |
| * 1 second had wrong number |
| * 2 wrong uuid |
| * 3 wrong other info |
| */ |
| mdp_super_t *first = st->sb; |
| mdp_super_t *second = tst->sb; |
| int uuid1[4], uuid2[4]; |
| |
| if (second->md_magic != MD_SB_MAGIC) |
| return 1; |
| if (!first) { |
| if (posix_memalign((void**)&first, 4096, |
| MD_SB_BYTES + |
| ROUND_UP(sizeof(struct bitmap_super_s), 4096)) != 0) { |
| pr_err("could not allocate superblock\n"); |
| return 1; |
| } |
| memcpy(first, second, MD_SB_BYTES + sizeof(struct bitmap_super_s)); |
| st->sb = first; |
| return 0; |
| } |
| |
| uuid_from_super0(st, uuid1); |
| uuid_from_super0(tst, uuid2); |
| if (!same_uuid(uuid1, uuid2, 0)) |
| return 2; |
| if (first->major_version != second->major_version || |
| first->minor_version != second->minor_version || |
| first->patch_version != second->patch_version || |
| first->gvalid_words != second->gvalid_words || |
| first->ctime != second->ctime || |
| first->level != second->level || |
| first->size != second->size || |
| first->raid_disks != second->raid_disks ) |
| return 3; |
| |
| return 0; |
| } |
| |
| static void free_super0(struct supertype *st); |
| |
| static int load_super0(struct supertype *st, int fd, char *devname) |
| { |
| /* try to read in the superblock |
| * Return: |
| * 0 on success |
| * 1 on cannot get superblock |
| * 2 on superblock meaningless |
| */ |
| unsigned long long dsize; |
| unsigned long long offset; |
| mdp_super_t *super; |
| int uuid[4]; |
| struct bitmap_super_s *bsb; |
| |
| free_super0(st); |
| |
| if (!get_dev_size(fd, devname, &dsize)) |
| return 1; |
| |
| if (dsize < MD_RESERVED_SECTORS*512) { |
| if (devname) |
| pr_err("%s is too small for md: size is %llu sectors.\n", |
| devname, dsize); |
| return 1; |
| } |
| st->devsize = dsize; |
| |
| offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
| |
| offset *= 512; |
| |
| if (lseek64(fd, offset, 0)< 0LL) { |
| if (devname) |
| pr_err("Cannot seek to superblock on %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| |
| if (posix_memalign((void**)&super, 4096, |
| MD_SB_BYTES + |
| ROUND_UP(sizeof(bitmap_super_t), 4096)) != 0) { |
| pr_err("could not allocate superblock\n"); |
| return 1; |
| } |
| |
| if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) { |
| if (devname) |
| pr_err("Cannot read superblock on %s\n", |
| devname); |
| free(super); |
| return 1; |
| } |
| |
| if (st->ss && st->minor_version == 9) |
| super0_swap_endian(super); |
| |
| if (super->md_magic != MD_SB_MAGIC) { |
| if (devname) |
| pr_err("No super block found on %s (Expected magic %08x, got %08x)\n", |
| devname, MD_SB_MAGIC, super->md_magic); |
| free(super); |
| return 2; |
| } |
| |
| if (super->major_version != 0) { |
| if (devname) |
| pr_err("Cannot interpret superblock on %s - version is %d\n", |
| devname, super->major_version); |
| free(super); |
| return 2; |
| } |
| st->sb = super; |
| |
| if (st->ss == NULL) { |
| st->ss = &super0; |
| st->minor_version = super->minor_version; |
| st->max_devs = MD_SB_DISKS; |
| st->info = NULL; |
| } |
| |
| /* Now check on the bitmap superblock */ |
| if ((super->state & (1<<MD_SB_BITMAP_PRESENT)) == 0) |
| return 0; |
| /* Read the bitmap superblock and make sure it looks |
| * valid. If it doesn't clear the bit. An --assemble --force |
| * should get that written out. |
| */ |
| if (read(fd, super+1, ROUND_UP(sizeof(struct bitmap_super_s),4096)) != |
| ROUND_UP(sizeof(struct bitmap_super_s), 4096)) |
| goto no_bitmap; |
| |
| uuid_from_super0(st, uuid); |
| bsb = (struct bitmap_super_s *)(super+1); |
| if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || |
| memcmp(bsb->uuid, uuid, 16) != 0) |
| goto no_bitmap; |
| return 0; |
| |
| no_bitmap: |
| super->state &= ~(1<<MD_SB_BITMAP_PRESENT); |
| |
| return 0; |
| } |
| |
| static struct supertype *match_metadata_desc0(char *arg) |
| { |
| struct supertype *st = xcalloc(1, sizeof(*st)); |
| |
| st->container_devnm[0] = 0; |
| st->ss = &super0; |
| st->info = NULL; |
| st->minor_version = 90; |
| st->max_devs = MD_SB_DISKS; |
| st->sb = NULL; |
| /* we sometimes get 00.90 */ |
| while (arg[0] == '0' && arg[1] == '0') |
| arg++; |
| if (strcmp(arg, "0") == 0 || |
| #ifdef DEFAULT_OLD_METADATA /* ifndef in super1.c */ |
| strcmp(arg, "default") == 0 || |
| #endif /* DEFAULT_OLD_METADATA */ |
| strcmp(arg, "0.90") == 0 || |
| strcmp(arg, "") == 0 /* no metadata - i.e. non_persistent */ |
| ) |
| return st; |
| |
| st->minor_version = 91; /* reshape in progress */ |
| if (strcmp(arg, "0.91") == 0) /* For dup_super support */ |
| return st; |
| |
| st->minor_version = 9; /* flag for 'byte-swapped' */ |
| if (strcmp(arg, "0.swap")==0 || |
| strcmp(arg, "0.9") == 0) /* For dup_super support */ |
| return st; |
| |
| free(st); |
| return NULL; |
| } |
| |
| static __u64 avail_size0(struct supertype *st, __u64 devsize, |
| unsigned long long data_offset) |
| { |
| if (data_offset != 0 && data_offset != INVALID_SECTORS) |
| return 0ULL; |
| if (devsize < MD_RESERVED_SECTORS) |
| return 0ULL; |
| return MD_NEW_SIZE_SECTORS(devsize); |
| } |
| |
| static int add_internal_bitmap0(struct supertype *st, int *chunkp, |
| int delay, int write_behind, |
| unsigned long long size, int may_change, |
| int major) |
| { |
| /* |
| * The bitmap comes immediately after the superblock and must be 60K in size |
| * at most. The default size is between 30K and 60K |
| * |
| * size is in sectors, chunk is in bytes !!! |
| */ |
| unsigned long long bits; |
| unsigned long long max_bits = (60*1024 - sizeof(bitmap_super_t))*8; |
| unsigned long long min_chunk; |
| int chunk = *chunkp; |
| mdp_super_t *sb = st->sb; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MD_SB_BYTES); |
| int uuid[4]; |
| |
| min_chunk = 4096; /* sub-page chunks don't work yet.. */ |
| bits = (size * 512) / min_chunk + 1; |
| while (bits > max_bits) { |
| min_chunk *= 2; |
| bits = (bits+1)/2; |
| } |
| if (chunk == UnSet) { |
| /* A chunk size less than a few Megabytes gives poor |
| * performance without increasing resync noticeably |
| */ |
| chunk = min_chunk; |
| if (chunk < 64*1024*1024) |
| chunk = 64*1024*1024; |
| } else if ((unsigned long long)chunk < min_chunk) |
| return -EINVAL; /* chunk size too small */ |
| |
| sb->state |= (1<<MD_SB_BITMAP_PRESENT); |
| |
| memset(bms, 0, sizeof(*bms)); |
| bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
| bms->version = __cpu_to_le32(major); |
| uuid_from_super0(st, uuid); |
| memcpy(bms->uuid, uuid, 16); |
| bms->chunksize = __cpu_to_le32(chunk); |
| bms->daemon_sleep = __cpu_to_le32(delay); |
| bms->sync_size = __cpu_to_le64(size); |
| bms->write_behind = __cpu_to_le32(write_behind); |
| *chunkp = chunk; |
| return 0; |
| } |
| |
| static int locate_bitmap0(struct supertype *st, int fd, int node_num) |
| { |
| unsigned long long dsize; |
| unsigned long long offset; |
| |
| if (!get_dev_size(fd, NULL, &dsize)) |
| return -1; |
| |
| if (dsize < MD_RESERVED_SECTORS*512) |
| return -1; |
| |
| offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
| |
| offset *= 512; |
| |
| offset += MD_SB_BYTES; |
| |
| lseek64(fd, offset, 0); |
| return 0; |
| } |
| |
| static int write_bitmap0(struct supertype *st, int fd, enum bitmap_update update) |
| { |
| unsigned long long dsize; |
| unsigned long long offset; |
| mdp_super_t *sb = st->sb; |
| |
| int rv = 0; |
| |
| int towrite, n; |
| void *buf; |
| |
| if (!get_dev_size(fd, NULL, &dsize)) |
| return 1; |
| |
| if (dsize < MD_RESERVED_SECTORS*512) |
| return -1; |
| |
| offset = MD_NEW_SIZE_SECTORS(dsize>>9); |
| |
| offset *= 512; |
| |
| if (lseek64(fd, offset + 4096, 0)< 0LL) |
| return 3; |
| |
| if (posix_memalign(&buf, 4096, 4096)) |
| return -ENOMEM; |
| |
| memset(buf, 0xff, 4096); |
| memcpy(buf, ((char*)sb)+MD_SB_BYTES, sizeof(bitmap_super_t)); |
| towrite = 60*1024; |
| while (towrite > 0) { |
| n = towrite; |
| if (n > 4096) |
| n = 4096; |
| n = write(fd, buf, n); |
| if (n > 0) |
| towrite -= n; |
| else |
| break; |
| memset(buf, 0xff, 4096); |
| } |
| fsync(fd); |
| if (towrite) |
| rv = -2; |
| |
| free(buf); |
| return rv; |
| } |
| |
| static void free_super0(struct supertype *st) |
| { |
| if (st->sb) |
| free(st->sb); |
| while (st->info) { |
| struct devinfo *di = st->info; |
| st->info = di->next; |
| if (di->fd >= 0) |
| close(di->fd); |
| free(di); |
| } |
| st->sb = NULL; |
| } |
| |
| static int validate_geometry0(struct supertype *st, int level, |
| int layout, int raiddisks, |
| int *chunk, unsigned long long size, |
| unsigned long long data_offset, |
| char *subdev, unsigned long long *freesize, |
| int consistency_policy, int verbose) |
| { |
| unsigned long long ldsize; |
| int fd; |
| unsigned int tbmax = 4; |
| |
| /* prior to linux 3.1, a but limits usable device size to 2TB. |
| * It was introduced in 2.6.29, but we won't worry about that detail |
| */ |
| if (get_linux_version() < 3001000) |
| tbmax = 2; |
| |
| if (level == LEVEL_CONTAINER) { |
| if (verbose) |
| pr_err("0.90 metadata does not support containers\n"); |
| return 0; |
| } |
| if (raiddisks > MD_SB_DISKS) { |
| if (verbose) |
| pr_err("0.90 metadata supports at most %d devices per array\n", |
| MD_SB_DISKS); |
| return 0; |
| } |
| if (size >= tbmax * 2ULL*1024*1024*1024) { |
| if (verbose) |
| pr_err("0.90 metadata supports at most %d terabytes per device\n", tbmax); |
| return 0; |
| } |
| if (*chunk == UnSet) |
| *chunk = DEFAULT_CHUNK; |
| |
| if (level == 0 && layout != UnSet) { |
| if (verbose) |
| pr_err("0.90 metadata does not support layouts for RAID0\n"); |
| return 0; |
| } |
| |
| if (!subdev) |
| return 1; |
| |
| fd = open(subdev, O_RDONLY|O_EXCL, 0); |
| if (fd < 0) { |
| if (verbose) |
| pr_err("super0.90 cannot open %s: %s\n", |
| subdev, strerror(errno)); |
| return 0; |
| } |
| |
| if (!get_dev_size(fd, subdev, &ldsize)) { |
| close(fd); |
| return 0; |
| } |
| close(fd); |
| |
| if (ldsize < MD_RESERVED_SECTORS * 512) |
| return 0; |
| *freesize = MD_NEW_SIZE_SECTORS(ldsize >> 9); |
| return 1; |
| } |
| |
| struct superswitch super0 = { |
| .examine_super = examine_super0, |
| .brief_examine_super = brief_examine_super0, |
| .export_examine_super = export_examine_super0, |
| .detail_super = detail_super0, |
| .brief_detail_super = brief_detail_super0, |
| .write_init_super = write_init_super0, |
| .validate_geometry = validate_geometry0, |
| .add_to_super = add_to_super0, |
| .copy_metadata = copy_metadata0, |
| .match_home = match_home0, |
| .uuid_from_super = uuid_from_super0, |
| .getinfo_super = getinfo_super0, |
| .container_content = container_content0, |
| .update_super = update_super0, |
| .init_super = init_super0, |
| .store_super = store_super0, |
| .compare_super = compare_super0, |
| .load_super = load_super0, |
| .match_metadata_desc = match_metadata_desc0, |
| .avail_size = avail_size0, |
| .add_internal_bitmap = add_internal_bitmap0, |
| .locate_bitmap = locate_bitmap0, |
| .write_bitmap = write_bitmap0, |
| .free_super = free_super0, |
| .name = "0.90", |
| }; |