| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2006 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@cse.unsw.edu.au> |
| * Paper: Neil Brown |
| * School of Computer Science and Engineering |
| * The University of New South Wales |
| * Sydney, 2052 |
| * Australia |
| */ |
| |
| #include "mdadm.h" |
| /* |
| * The version-1 superblock : |
| * All numeric fields are little-endian. |
| * |
| * total size: 256 bytes plus 2 per device. |
| * 1K allows 384 devices. |
| */ |
| struct mdp_superblock_1 { |
| /* constant array information - 128 bytes */ |
| __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */ |
| __u32 major_version; /* 1 */ |
| __u32 feature_map; /* 0 for now */ |
| __u32 pad0; /* always set to 0 when writing */ |
| |
| __u8 set_uuid[16]; /* user-space generated. */ |
| char set_name[32]; /* set and interpreted by user-space */ |
| |
| __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/ |
| __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */ |
| __u32 layout; /* only for raid5 currently */ |
| __u64 size; /* used size of component devices, in 512byte sectors */ |
| |
| __u32 chunksize; /* in 512byte sectors */ |
| __u32 raid_disks; |
| __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts |
| * NOTE: signed, so bitmap can be before superblock |
| * only meaningful of feature_map[0] is set. |
| */ |
| |
| /* These are only valid with feature bit '4' */ |
| __u32 new_level; /* new level we are reshaping to */ |
| __u64 reshape_position; /* next address in array-space for reshape */ |
| __u32 delta_disks; /* change in number of raid_disks */ |
| __u32 new_layout; /* new layout */ |
| __u32 new_chunk; /* new chunk size (bytes) */ |
| __u8 pad1[128-124]; /* set to 0 when written */ |
| |
| /* constant this-device information - 64 bytes */ |
| __u64 data_offset; /* sector start of data, often 0 */ |
| __u64 data_size; /* sectors in this device that can be used for data */ |
| __u64 super_offset; /* sector start of this superblock */ |
| __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ |
| __u32 dev_number; /* permanent identifier of this device - not role in raid */ |
| __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */ |
| __u8 device_uuid[16]; /* user-space setable, ignored by kernel */ |
| __u8 devflags; /* per-device flags. Only one defined...*/ |
| #define WriteMostly1 1 /* mask for writemostly flag in above */ |
| __u8 pad2[64-57]; /* set to 0 when writing */ |
| |
| /* array state information - 64 bytes */ |
| __u64 utime; /* 40 bits second, 24 btes microseconds */ |
| __u64 events; /* incremented when superblock updated */ |
| __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */ |
| __u32 sb_csum; /* checksum upto devs[max_dev] */ |
| __u32 max_dev; /* size of devs[] array to consider */ |
| __u8 pad3[64-32]; /* set to 0 when writing */ |
| |
| /* device state information. Indexed by dev_number. |
| * 2 bytes per device |
| * Note there are no per-device state flags. State information is rolled |
| * into the 'roles' value. If a device is spare or faulty, then it doesn't |
| * have a meaningful role. |
| */ |
| __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */ |
| }; |
| |
| struct misc_dev_info { |
| __u64 device_size; |
| }; |
| |
| /* feature_map bits */ |
| #define MD_FEATURE_BITMAP_OFFSET 1 |
| #define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and |
| * must be honoured |
| */ |
| #define MD_FEATURE_RESHAPE_ACTIVE 4 |
| |
| #define MD_FEATURE_ALL (1|2|4) |
| |
| #ifndef offsetof |
| #define offsetof(t,f) ((size_t)&(((t*)0)->f)) |
| #endif |
| static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb) |
| { |
| unsigned int disk_csum, csum; |
| unsigned long long newcsum; |
| int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2; |
| unsigned int *isuper = (unsigned int*)sb; |
| int i; |
| |
| /* make sure I can count... */ |
| if (offsetof(struct mdp_superblock_1,data_offset) != 128 || |
| offsetof(struct mdp_superblock_1, utime) != 192 || |
| sizeof(struct mdp_superblock_1) != 256) { |
| fprintf(stderr, "WARNING - superblock isn't sized correctly\n"); |
| } |
| |
| disk_csum = sb->sb_csum; |
| sb->sb_csum = 0; |
| newcsum = 0; |
| for (i=0; size>=4; size -= 4 ) { |
| newcsum += __le32_to_cpu(*isuper); |
| isuper++; |
| } |
| |
| if (size == 2) |
| newcsum += __le16_to_cpu(*(unsigned short*) isuper); |
| |
| csum = (newcsum & 0xffffffff) + (newcsum >> 32); |
| sb->sb_csum = disk_csum; |
| return __cpu_to_le32(csum); |
| } |
| |
| #ifndef MDASSEMBLE |
| static void examine_super1(struct supertype *st, char *homehost) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| time_t atime; |
| int d; |
| int faulty; |
| int i; |
| char *c; |
| int l = homehost ? strlen(homehost) : 0; |
| int layout; |
| unsigned long long sb_offset; |
| |
| printf(" Magic : %08x\n", __le32_to_cpu(sb->magic)); |
| printf(" Version : 1"); |
| sb_offset = __le64_to_cpu(sb->super_offset); |
| if (sb_offset <= 4) |
| printf(".1\n"); |
| else if (sb_offset <= 8) |
| printf(".2\n"); |
| else |
| printf(".0\n"); |
| printf(" Feature Map : 0x%x\n", __le32_to_cpu(sb->feature_map)); |
| printf(" Array UUID : "); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->set_uuid[i]); |
| } |
| printf("\n"); |
| printf(" Name : %.32s", sb->set_name); |
| if (l > 0 && l < 32 && |
| sb->set_name[l] == ':' && |
| strncmp(sb->set_name, homehost, l) == 0) |
| printf(" (local to host %s)", homehost); |
| printf("\n"); |
| atime = __le64_to_cpu(sb->ctime) & 0xFFFFFFFFFFULL; |
| printf(" Creation Time : %.24s\n", ctime(&atime)); |
| c=map_num(pers, __le32_to_cpu(sb->level)); |
| printf(" Raid Level : %s\n", c?c:"-unknown-"); |
| printf(" Raid Devices : %d\n", __le32_to_cpu(sb->raid_disks)); |
| printf("\n"); |
| printf(" Avail Dev Size : %llu%s\n", |
| (unsigned long long)__le64_to_cpu(sb->data_size), |
| human_size(__le64_to_cpu(sb->data_size)<<9)); |
| if (__le32_to_cpu(sb->level) >= 0) { |
| int ddsks=0; |
| switch(__le32_to_cpu(sb->level)) { |
| case 1: ddsks=1;break; |
| case 4: |
| case 5: ddsks = __le32_to_cpu(sb->raid_disks)-1; break; |
| case 6: ddsks = __le32_to_cpu(sb->raid_disks)-2; break; |
| case 10: |
| layout = __le32_to_cpu(sb->layout); |
| ddsks = __le32_to_cpu(sb->raid_disks) |
| / (layout&255) / ((layout>>8)&255); |
| } |
| if (ddsks) |
| printf(" Array Size : %llu%s\n", |
| ddsks*(unsigned long long)__le64_to_cpu(sb->size), |
| human_size(ddsks*__le64_to_cpu(sb->size)<<9)); |
| if (sb->size != sb->data_size) |
| printf(" Used Dev Size : %llu%s\n", |
| (unsigned long long)__le64_to_cpu(sb->size), |
| human_size(__le64_to_cpu(sb->size)<<9)); |
| } |
| if (sb->data_offset) |
| printf(" Data Offset : %llu sectors\n", |
| (unsigned long long)__le64_to_cpu(sb->data_offset)); |
| printf(" Super Offset : %llu sectors\n", |
| (unsigned long long)__le64_to_cpu(sb->super_offset)); |
| if (__le32_to_cpu(sb->feature_map) & MD_FEATURE_RECOVERY_OFFSET) |
| printf("Recovery Offset : %llu sectors\n", (unsigned long long)__le64_to_cpu(sb->recovery_offset)); |
| printf(" State : %s\n", (__le64_to_cpu(sb->resync_offset)+1)? "active":"clean"); |
| printf(" Device UUID : "); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->device_uuid[i]); |
| } |
| printf("\n"); |
| printf("\n"); |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
| printf("Internal Bitmap : %ld sectors from superblock\n", |
| (long)(int32_t)__le32_to_cpu(sb->bitmap_offset)); |
| } |
| if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
| printf(" Reshape pos'n : %llu%s\n", (unsigned long long)__le64_to_cpu(sb->reshape_position)/2, |
| human_size(__le64_to_cpu(sb->reshape_position)<<9)); |
| if (__le32_to_cpu(sb->delta_disks)) { |
| printf(" Delta Devices : %d", __le32_to_cpu(sb->delta_disks)); |
| if (__le32_to_cpu(sb->delta_disks)) |
| printf(" (%d->%d)\n", |
| __le32_to_cpu(sb->raid_disks)-__le32_to_cpu(sb->delta_disks), |
| __le32_to_cpu(sb->raid_disks)); |
| else |
| printf(" (%d->%d)\n", __le32_to_cpu(sb->raid_disks), |
| __le32_to_cpu(sb->raid_disks)+__le32_to_cpu(sb->delta_disks)); |
| } |
| if (__le32_to_cpu(sb->new_level) != __le32_to_cpu(sb->level)) { |
| c = map_num(pers, __le32_to_cpu(sb->new_level)); |
| printf(" New Level : %s\n", c?c:"-unknown-"); |
| } |
| if (__le32_to_cpu(sb->new_layout) != __le32_to_cpu(sb->layout)) { |
| if (__le32_to_cpu(sb->level) == 5) { |
| c = map_num(r5layout, __le32_to_cpu(sb->new_layout)); |
| printf(" New Layout : %s\n", c?c:"-unknown-"); |
| } |
| if (__le32_to_cpu(sb->level) == 10) { |
| printf(" New Layout :"); |
| print_r10_layout(__le32_to_cpu(sb->new_layout)); |
| printf("\n"); |
| } |
| } |
| if (__le32_to_cpu(sb->new_chunk) != __le32_to_cpu(sb->chunksize)) |
| printf(" New Chunksize : %dK\n", __le32_to_cpu(sb->new_chunk)/2); |
| printf("\n"); |
| } |
| if (sb->devflags) { |
| printf(" Flags :"); |
| if (sb->devflags & WriteMostly1) |
| printf(" write-mostly"); |
| printf("\n"); |
| } |
| |
| atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; |
| printf(" Update Time : %.24s\n", ctime(&atime)); |
| |
| if (calc_sb_1_csum(sb) == sb->sb_csum) |
| printf(" Checksum : %x - correct\n", __le32_to_cpu(sb->sb_csum)); |
| else |
| printf(" Checksum : %x - expected %x\n", __le32_to_cpu(sb->sb_csum), |
| __le32_to_cpu(calc_sb_1_csum(sb))); |
| printf(" Events : %llu\n", (unsigned long long)__le64_to_cpu(sb->events)); |
| printf("\n"); |
| if (__le32_to_cpu(sb->level) == 5) { |
| c = map_num(r5layout, __le32_to_cpu(sb->layout)); |
| printf(" Layout : %s\n", c?c:"-unknown-"); |
| } |
| if (__le32_to_cpu(sb->level) == 10) { |
| int lo = __le32_to_cpu(sb->layout); |
| printf(" Layout :"); |
| print_r10_layout(lo); |
| printf("\n"); |
| } |
| switch(__le32_to_cpu(sb->level)) { |
| case 0: |
| case 4: |
| case 5: |
| case 6: |
| case 10: |
| printf(" Chunk Size : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
| break; |
| case -1: |
| printf(" Rounding : %dK\n", __le32_to_cpu(sb->chunksize)/2); |
| break; |
| default: break; |
| } |
| printf("\n"); |
| printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number)); |
| for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--) |
| if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff) |
| break; |
| for (d=0; d < i; d++) { |
| int role = __le16_to_cpu(sb->dev_roles[d]); |
| if (d) printf(", "); |
| if (role == 0xffff) printf("empty"); |
| else if(role == 0xfffe) printf("failed"); |
| else printf("%d", role); |
| } |
| printf(")\n"); |
| printf(" Array State : "); |
| for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) { |
| int cnt = 0; |
| int me = 0; |
| int i; |
| for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
| int role = __le16_to_cpu(sb->dev_roles[i]); |
| if (role == d) { |
| if (i == __le32_to_cpu(sb->dev_number)) |
| me = 1; |
| cnt++; |
| } |
| } |
| if (cnt > 1) printf("?"); |
| else if (cnt == 1 && me) printf("U"); |
| else if (cnt == 1) printf("u"); |
| else printf ("_"); |
| } |
| faulty = 0; |
| for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
| int role = __le16_to_cpu(sb->dev_roles[i]); |
| if (role == 0xFFFE) |
| faulty++; |
| } |
| if (faulty) printf(" %d failed", faulty); |
| printf("\n"); |
| } |
| |
| |
| static void brief_examine_super1(struct supertype *st) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int i; |
| unsigned long long sb_offset; |
| char *nm; |
| char *c=map_num(pers, __le32_to_cpu(sb->level)); |
| |
| nm = strchr(sb->set_name, ':'); |
| if (nm) |
| nm++; |
| else if (sb->set_name[0]) |
| nm = sb->set_name; |
| else |
| nm = "??"; |
| |
| printf("ARRAY /dev/md/%s level=%s ", nm, c?c:"-unknown-"); |
| sb_offset = __le64_to_cpu(sb->super_offset); |
| if (sb_offset <= 4) |
| printf("metadata=1.1 "); |
| else if (sb_offset <= 8) |
| printf("metadata=1.2 "); |
| else |
| printf("metadata=1.0 "); |
| printf("num-devices=%d UUID=", __le32_to_cpu(sb->raid_disks)); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->set_uuid[i]); |
| } |
| if (sb->set_name[0]) |
| printf(" name=%.32s", sb->set_name); |
| printf("\n"); |
| } |
| |
| static void export_examine_super1(struct supertype *st) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int i; |
| int len = 32; |
| |
| printf("MD_LEVEL=%s\n", map_num(pers, __le32_to_cpu(sb->level))); |
| printf("MD_DEVICES=%d\n", __le32_to_cpu(sb->raid_disks)); |
| for (i=0; i<32; i++) |
| if (sb->set_name[i] == '\n' || |
| sb->set_name[i] == '\0') { |
| len = i; |
| break; |
| } |
| if (len) |
| printf("MD_NAME=%.*s\n", len, sb->set_name); |
| printf("MD_UUID="); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->set_uuid[i]); |
| } |
| printf("\n"); |
| printf("MD_UPDATE_TIME=%llu\n", |
| __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL); |
| printf("MD_DEV_UUID="); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->device_uuid[i]); |
| } |
| printf("\n"); |
| printf("MD_EVENTS=%llu\n", |
| (unsigned long long)__le64_to_cpu(sb->events)); |
| } |
| |
| static void detail_super1(struct supertype *st, char *homehost) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int i; |
| int l = homehost ? strlen(homehost) : 0; |
| |
| printf(" Name : %.32s", sb->set_name); |
| if (l > 0 && l < 32 && |
| sb->set_name[l] == ':' && |
| strncmp(sb->set_name, homehost, l) == 0) |
| printf(" (local to host %s)", homehost); |
| printf("\n UUID : "); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->set_uuid[i]); |
| } |
| printf("\n Events : %llu\n\n", (unsigned long long)__le64_to_cpu(sb->events)); |
| } |
| |
| static void brief_detail_super1(struct supertype *st) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int i; |
| |
| if (sb->set_name[0]) |
| printf(" name=%.32s", sb->set_name); |
| printf(" UUID="); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->set_uuid[i]); |
| } |
| } |
| |
| static void export_detail_super1(struct supertype *st) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int i; |
| int len = 32; |
| |
| for (i=0; i<32; i++) |
| if (sb->set_name[i] == '\n' || |
| sb->set_name[i] == '\0') { |
| len = i; |
| break; |
| } |
| if (len) |
| printf("MD_NAME=%.*s\n", len, sb->set_name); |
| printf("MD_UUID="); |
| for (i=0; i<16; i++) { |
| if ((i&3)==0 && i != 0) printf(":"); |
| printf("%02x", sb->set_uuid[i]); |
| } |
| printf("\n"); |
| } |
| |
| #endif |
| |
| static int match_home1(struct supertype *st, char *homehost) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int l = homehost ? strlen(homehost) : 0; |
| |
| return (l > 0 && l < 32 && |
| sb->set_name[l] == ':' && |
| strncmp(sb->set_name, homehost, l) == 0); |
| } |
| |
| static void uuid_from_super1(struct supertype *st, int uuid[4]) |
| { |
| struct mdp_superblock_1 *super = st->sb; |
| char *cuuid = (char*)uuid; |
| int i; |
| for (i=0; i<16; i++) |
| cuuid[i] = super->set_uuid[i]; |
| } |
| |
| static void getinfo_super1(struct supertype *st, struct mdinfo *info) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int working = 0; |
| int i; |
| int role; |
| |
| info->array.major_version = 1; |
| info->array.minor_version = __le32_to_cpu(sb->feature_map); |
| info->array.patch_version = 0; |
| info->array.raid_disks = __le32_to_cpu(sb->raid_disks); |
| info->array.level = __le32_to_cpu(sb->level); |
| info->array.layout = __le32_to_cpu(sb->layout); |
| info->array.md_minor = -1; |
| info->array.ctime = __le64_to_cpu(sb->ctime); |
| info->array.utime = __le64_to_cpu(sb->utime); |
| info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512; |
| info->array.state = |
| (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size)) |
| ? 1 : 0; |
| |
| info->data_offset = __le64_to_cpu(sb->data_offset); |
| info->component_size = __le64_to_cpu(sb->size); |
| |
| info->disk.major = 0; |
| info->disk.minor = 0; |
| info->disk.number = __le32_to_cpu(sb->dev_number); |
| if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) || |
| __le32_to_cpu(sb->max_dev) > 512) |
| role = 0xfffe; |
| else |
| role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); |
| |
| info->disk.raid_disk = -1; |
| switch(role) { |
| case 0xFFFF: |
| info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */ |
| break; |
| case 0xFFFE: |
| info->disk.state = 1; /* faulty */ |
| break; |
| default: |
| info->disk.state = 6; /* active and in sync */ |
| info->disk.raid_disk = role; |
| } |
| info->events = __le64_to_cpu(sb->events); |
| |
| memcpy(info->uuid, sb->set_uuid, 16); |
| |
| strncpy(info->name, sb->set_name, 32); |
| info->name[32] = 0; |
| |
| if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
| info->reshape_active = 1; |
| info->reshape_progress = __le64_to_cpu(sb->reshape_position); |
| info->new_level = __le32_to_cpu(sb->new_level); |
| info->delta_disks = __le32_to_cpu(sb->delta_disks); |
| info->new_layout = __le32_to_cpu(sb->new_layout); |
| info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9; |
| } else |
| info->reshape_active = 0; |
| |
| for (i=0; i< __le32_to_cpu(sb->max_dev); i++) { |
| role = __le16_to_cpu(sb->dev_roles[i]); |
| if (/*role == 0xFFFF || */role < info->array.raid_disks) |
| working++; |
| } |
| |
| info->array.working_disks = working; |
| } |
| |
| static int update_super1(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; |
| struct mdp_superblock_1 *sb = st->sb; |
| |
| if (strcmp(update, "force-one")==0) { |
| /* Not enough devices for a working array, |
| * so bring this one up-to-date |
| */ |
| if (sb->events != __cpu_to_le64(info->events)) |
| rv = 1; |
| sb->events = __cpu_to_le64(info->events); |
| } |
| if (strcmp(update, "force-array")==0) { |
| /* Degraded array and 'force' requests to |
| * maybe need to mark it 'clean'. |
| */ |
| switch(__le32_to_cpu(sb->level)) { |
| case 5: case 4: case 6: |
| /* need to force clean */ |
| if (sb->resync_offset != ~0ULL) |
| rv = 1; |
| sb->resync_offset = ~0ULL; |
| } |
| } |
| if (strcmp(update, "assemble")==0) { |
| int d = info->disk.number; |
| int want; |
| if (info->disk.state == 6) |
| want = __cpu_to_le32(info->disk.raid_disk); |
| else |
| want = 0xFFFF; |
| if (sb->dev_roles[d] != want) { |
| sb->dev_roles[d] = want; |
| rv = 1; |
| } |
| } |
| if (strcmp(update, "linear-grow-new") == 0) { |
| int i; |
| int rfd, fd; |
| int max = __le32_to_cpu(sb->max_dev); |
| |
| for (i=0 ; i < max ; i++) |
| if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe) |
| break; |
| sb->dev_number = __cpu_to_le32(i); |
| info->disk.number = i; |
| if (max >= __le32_to_cpu(sb->max_dev)) |
| sb->max_dev = __cpu_to_le32(max+1); |
| |
| if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
| read(rfd, sb->device_uuid, 16) != 16) { |
| __u32 r[4] = {random(), random(), random(), random()}; |
| memcpy(sb->device_uuid, r, 16); |
| } |
| |
| sb->dev_roles[i] = |
| __cpu_to_le16(info->disk.raid_disk); |
| |
| fd = open(devname, O_RDONLY); |
| if (fd >= 0) { |
| unsigned long long ds; |
| get_dev_size(fd, devname, &ds); |
| close(fd); |
| ds >>= 9; |
| if (__le64_to_cpu(sb->super_offset) < |
| __le64_to_cpu(sb->data_offset)) { |
| sb->data_size = __cpu_to_le64( |
| ds - __le64_to_cpu(sb->data_offset)); |
| } else { |
| ds -= 8*2; |
| ds &= ~(unsigned long long)(4*2-1); |
| sb->super_offset = __cpu_to_le64(ds); |
| sb->data_size = __cpu_to_le64( |
| ds - __le64_to_cpu(sb->data_offset)); |
| } |
| } |
| } |
| if (strcmp(update, "linear-grow-update") == 0) { |
| sb->raid_disks = __cpu_to_le32(info->array.raid_disks); |
| sb->dev_roles[info->disk.number] = |
| __cpu_to_le16(info->disk.raid_disk); |
| } |
| if (strcmp(update, "resync") == 0) { |
| /* make sure resync happens */ |
| sb->resync_offset = 0ULL; |
| } |
| if (strcmp(update, "uuid") == 0) { |
| copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); |
| |
| if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) { |
| struct bitmap_super_s *bm; |
| bm = (struct bitmap_super_s*)(st->sb+1024); |
| memcpy(bm->uuid, sb->set_uuid, 16); |
| } |
| } |
| if (strcmp(update, "homehost") == 0 && |
| homehost) { |
| char *c; |
| update = "name"; |
| c = strchr(sb->set_name, ':'); |
| if (c) |
| strncpy(info->name, c+1, 31 - (c-sb->set_name)); |
| else |
| strncpy(info->name, sb->set_name, 32); |
| info->name[32] = 0; |
| } |
| if (strcmp(update, "name") == 0) { |
| if (info->name[0] == 0) |
| sprintf(info->name, "%d", info->array.md_minor); |
| memset(sb->set_name, 0, sizeof(sb->set_name)); |
| if (homehost && |
| strchr(info->name, ':') == NULL && |
| strlen(homehost)+1+strlen(info->name) < 32) { |
| strcpy(sb->set_name, homehost); |
| strcat(sb->set_name, ":"); |
| strcat(sb->set_name, info->name); |
| } else |
| strcpy(sb->set_name, info->name); |
| } |
| if (strcmp(update, "devicesize") == 0 && |
| __le64_to_cpu(sb->super_offset) < |
| __le64_to_cpu(sb->data_offset)) { |
| /* set data_size to device size less data_offset */ |
| struct misc_dev_info *misc = (struct misc_dev_info*) |
| (st->sb + 1024 + sizeof(struct bitmap_super_s)); |
| printf("Size was %llu\n", (unsigned long long) |
| __le64_to_cpu(sb->data_size)); |
| sb->data_size = __cpu_to_le64( |
| misc->device_size - __le64_to_cpu(sb->data_offset)); |
| printf("Size is %llu\n", (unsigned long long) |
| __le64_to_cpu(sb->data_size)); |
| } |
| if (strcmp(update, "_reshape_progress")==0) |
| sb->reshape_position = __cpu_to_le64(info->reshape_progress); |
| |
| sb->sb_csum = calc_sb_1_csum(sb); |
| return rv; |
| } |
| |
| static unsigned long choose_bm_space(unsigned long devsize) |
| { |
| /* if the device is bigger than 8Gig, save 64k for bitmap usage, |
| * if bigger than 200Gig, save 128k |
| */ |
| if (devsize < 64*2) return 0; |
| if (devsize - 64*2 >= 200*1024*1024*2) |
| return 128*2; |
| if (devsize - 4*2 > 8*1024*1024*2) |
| return 64*2; |
| return 4*2; |
| } |
| |
| static int init_super1(struct supertype *st, mdu_array_info_t *info, |
| unsigned long long size, char *name, char *homehost, |
| int *uuid, unsigned long reserve_space) |
| { |
| struct mdp_superblock_1 *sb = malloc(1024 + sizeof(bitmap_super_t) + |
| sizeof(struct misc_dev_info)); |
| int spares; |
| int rfd; |
| int bm_space; |
| char defname[10]; |
| memset(sb, 0, 1024); |
| |
| st->sb = sb; |
| if (info->major_version == -1) { |
| /* zeroing superblock */ |
| return 0; |
| } |
| |
| spares = info->working_disks - info->active_disks; |
| if (info->raid_disks + spares > 384) { |
| fprintf(stderr, Name ": too many devices requested: %d+%d > %d\n", |
| info->raid_disks , spares, 384); |
| return 0; |
| } |
| |
| sb->magic = __cpu_to_le32(MD_SB_MAGIC); |
| sb->major_version = __cpu_to_le32(1); |
| sb->feature_map = 0; |
| sb->pad0 = 0; |
| |
| if (uuid) |
| copy_uuid(sb->set_uuid, uuid, super1.swapuuid); |
| else { |
| if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
| read(rfd, sb->set_uuid, 16) != 16) { |
| __u32 r[4] = {random(), random(), random(), random()}; |
| memcpy(sb->set_uuid, r, 16); |
| } |
| if (rfd >= 0) close(rfd); |
| } |
| |
| if (name == NULL || *name == 0) { |
| sprintf(defname, "%d", info->md_minor); |
| name = defname; |
| } |
| memset(sb->set_name, 0, 32); |
| if (homehost && |
| strchr(name, ':')== NULL && |
| strlen(homehost)+1+strlen(name) < 32) { |
| strcpy(sb->set_name, homehost); |
| strcat(sb->set_name, ":"); |
| strcat(sb->set_name, name); |
| } else |
| strcpy(sb->set_name, name); |
| |
| sb->ctime = __cpu_to_le64((unsigned long long)time(0)); |
| sb->level = __cpu_to_le32(info->level); |
| sb->layout = __cpu_to_le32(info->layout); |
| sb->size = __cpu_to_le64(size*2ULL); |
| sb->chunksize = __cpu_to_le32(info->chunk_size>>9); |
| sb->raid_disks = __cpu_to_le32(info->raid_disks); |
| |
| sb->data_size = __cpu_to_le64(0); |
| sb->super_offset = __cpu_to_le64(0); |
| sb->recovery_offset = __cpu_to_le64(0); |
| |
| bm_space = choose_bm_space(size*2); |
| |
| switch(st->minor_version) { |
| case 0: |
| sb->data_offset = __cpu_to_le64(reserve_space); |
| sb->bitmap_offset = __cpu_to_le32(0); |
| break; |
| case 1: |
| sb->super_offset = __cpu_to_le64(0); |
| sb->data_offset = __cpu_to_le64(4*2 + |
| reserve_space + bm_space); |
| sb->bitmap_offset = __cpu_to_le32(reserve_space + 4*2); |
| break; |
| case 2: |
| sb->super_offset = __cpu_to_le64(4*2); |
| sb->data_offset = __cpu_to_le64(4*2 + 4*2 + |
| reserve_space + bm_space); |
| sb->bitmap_offset = __cpu_to_le32(reserve_space + 4*2); |
| break; |
| } |
| |
| sb->utime = sb->ctime; |
| sb->events = __cpu_to_le64(1); |
| if (info->state & (1<<MD_SB_CLEAN)) |
| sb->resync_offset = ~0ULL; |
| else |
| sb->resync_offset = 0; |
| sb->max_dev = __cpu_to_le32((1024- sizeof(struct mdp_superblock_1))/ |
| sizeof(sb->dev_roles[0])); |
| memset(sb->pad3, 0, sizeof(sb->pad3)); |
| |
| memset(sb->dev_roles, 0xff, 1024 - sizeof(struct mdp_superblock_1)); |
| |
| return 1; |
| } |
| |
| /* Add a device to the superblock being created */ |
| static void add_to_super1(struct supertype *st, mdu_disk_info_t *dk) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| __u16 *rp = sb->dev_roles + dk->number; |
| if ((dk->state & 6) == 6) /* active, sync */ |
| *rp = __cpu_to_le16(dk->raid_disk); |
| else if ((dk->state & ~2) == 0) /* active or idle -> spare */ |
| *rp = 0xffff; |
| else |
| *rp = 0xfffe; |
| if (dk->number >= __le32_to_cpu(sb->max_dev) && |
| __le32_to_cpu(sb->max_dev) < 384) |
| sb->max_dev = __cpu_to_le32(dk->number+1); |
| } |
| |
| static void locate_bitmap1(struct supertype *st, int fd); |
| |
| static int store_super1(struct supertype *st, int fd) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| unsigned long long sb_offset; |
| int sbsize; |
| unsigned long long dsize; |
| |
| if (!get_dev_size(fd, NULL, &dsize)) |
| return 1; |
| |
| dsize >>= 9; |
| |
| if (dsize < 24) |
| return 2; |
| |
| /* |
| * Calculate the position of the superblock. |
| * It is always aligned to a 4K boundary and |
| * depending on minor_version, it can be: |
| * 0: At least 8K, but less than 12K, from end of device |
| * 1: At start of device |
| * 2: 4K from start of device. |
| */ |
| switch(st->minor_version) { |
| case 0: |
| sb_offset = dsize; |
| sb_offset -= 8*2; |
| sb_offset &= ~(4*2-1); |
| break; |
| case 1: |
| sb_offset = 0; |
| break; |
| case 2: |
| sb_offset = 4*2; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| |
| |
| if (sb_offset != __le64_to_cpu(sb->super_offset) && |
| 0 != __le64_to_cpu(sb->super_offset) |
| ) { |
| fprintf(stderr, Name ": internal error - sb_offset is wrong\n"); |
| abort(); |
| } |
| |
| if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
| return 3; |
| |
| sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev); |
| |
| if (write(fd, sb, sbsize) != sbsize) |
| return 4; |
| |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
| struct bitmap_super_s *bm = (struct bitmap_super_s*) |
| (((char*)sb)+1024); |
| if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { |
| locate_bitmap1(st, fd); |
| if (write(fd, bm, sizeof(*bm)) != sizeof(*bm)) |
| return 5; |
| } |
| } |
| fsync(fd); |
| return 0; |
| } |
| |
| static int load_super1(struct supertype *st, int fd, char *devname); |
| |
| static int write_init_super1(struct supertype *st, |
| mdu_disk_info_t *dinfo, char *devname) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| struct supertype refst; |
| int fd = dev_open(devname, O_RDWR | O_EXCL); |
| int rfd; |
| int rv; |
| int bm_space; |
| |
| unsigned long long dsize, array_size; |
| long long sb_offset; |
| |
| |
| if (fd < 0) { |
| fprintf(stderr, Name ": Failed to open %s to write superblock\n", |
| devname); |
| return -1; |
| } |
| |
| sb->dev_number = __cpu_to_le32(dinfo->number); |
| if (dinfo->state & (1<<MD_DISK_WRITEMOSTLY)) |
| sb->devflags |= __cpu_to_le32(WriteMostly1); |
| |
| if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || |
| read(rfd, sb->device_uuid, 16) != 16) { |
| __u32 r[4] = {random(), random(), random(), random()}; |
| memcpy(sb->device_uuid, r, 16); |
| } |
| |
| if (rfd >= 0) close(rfd); |
| sb->events = 0; |
| |
| refst =*st; |
| refst.sb = NULL; |
| if (load_super1(&refst, fd, NULL)==0) { |
| struct mdp_superblock_1 *refsb = refst.sb; |
| |
| memcpy(sb->device_uuid, refsb->device_uuid, 16); |
| if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) { |
| /* same array, so preserve events and dev_number */ |
| sb->events = refsb->events; |
| /* bugs in 2.6.17 and earlier mean the dev_number |
| * chosen in Manage must be preserved |
| */ |
| if (get_linux_version() >= 2006018) |
| sb->dev_number = refsb->dev_number; |
| } |
| free(refsb); |
| } |
| |
| if (!get_dev_size(fd, NULL, &dsize)) |
| return 1; |
| dsize >>= 9; |
| |
| if (dsize < 24) { |
| close(fd); |
| return 2; |
| } |
| |
| |
| /* |
| * Calculate the position of the superblock. |
| * It is always aligned to a 4K boundary and |
| * depending on minor_version, it can be: |
| * 0: At least 8K, but less than 12K, from end of device |
| * 1: At start of device |
| * 2: 4K from start of device. |
| * Depending on the array size, we might leave extra space |
| * for a bitmap. |
| */ |
| |
| switch(st->minor_version) { |
| case 0: |
| sb_offset = dsize; |
| sb_offset -= 8*2; |
| sb_offset &= ~(4*2-1); |
| sb->super_offset = __cpu_to_le64(sb_offset); |
| |
| array_size = __le64_to_cpu(sb->size); |
| /* work out how much space we left for a bitmap */ |
| bm_space = choose_bm_space(array_size); |
| if (sb_offset - bm_space < array_size) |
| bm_space = sb_offset - array_size; |
| sb->data_size = __cpu_to_le64(sb_offset - bm_space - |
| __le64_to_cpu(sb->data_offset)); |
| break; |
| case 1: |
| sb_offset = 0; |
| sb->data_size = __cpu_to_le64(dsize - |
| __le64_to_cpu(sb->data_offset)); |
| break; |
| case 2: |
| sb_offset = 4*2; |
| sb->data_size = __cpu_to_le64(dsize - |
| __le64_to_cpu(sb->data_offset)); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| |
| sb->sb_csum = calc_sb_1_csum(sb); |
| rv = store_super1(st, fd); |
| if (rv) |
| fprintf(stderr, Name ": failed to write superblock to %s\n", devname); |
| |
| if (rv == 0 && (__le32_to_cpu(sb->feature_map) & 1)) |
| rv = st->ss->write_bitmap(st, fd); |
| close(fd); |
| return rv; |
| } |
| |
| static int compare_super1(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 mdp_superblock_1 *first = st->sb; |
| struct mdp_superblock_1 *second = tst->sb; |
| |
| if (second->magic != __cpu_to_le32(MD_SB_MAGIC)) |
| return 1; |
| if (second->major_version != __cpu_to_le32(1)) |
| return 1; |
| |
| if (!first) { |
| first = malloc(1024+sizeof(bitmap_super_t) + |
| sizeof(struct misc_dev_info)); |
| memcpy(first, second, 1024+sizeof(bitmap_super_t) + |
| sizeof(struct misc_dev_info)); |
| st->sb = first; |
| return 0; |
| } |
| if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0) |
| return 2; |
| |
| if (first->ctime != second->ctime || |
| first->level != second->level || |
| first->layout != second->layout || |
| first->size != second->size || |
| first->chunksize != second->chunksize || |
| first->raid_disks != second->raid_disks) |
| return 3; |
| return 0; |
| } |
| |
| static void free_super1(struct supertype *st); |
| |
| static int load_super1(struct supertype *st, int fd, char *devname) |
| { |
| unsigned long long dsize; |
| unsigned long long sb_offset; |
| struct mdp_superblock_1 *super; |
| int uuid[4]; |
| struct bitmap_super_s *bsb; |
| struct misc_dev_info *misc; |
| |
| free_super1(st); |
| |
| if (st->ss == NULL || st->minor_version == -1) { |
| int bestvers = -1; |
| struct supertype tst; |
| __u64 bestctime = 0; |
| /* guess... choose latest ctime */ |
| tst.ss = &super1; |
| tst.sb = NULL; |
| for (tst.minor_version = 0; tst.minor_version <= 2 ; tst.minor_version++) { |
| switch(load_super1(&tst, fd, devname)) { |
| case 0: super = tst.sb; |
| if (bestvers == -1 || |
| bestctime < __le64_to_cpu(super->ctime)) { |
| bestvers = tst.minor_version; |
| bestctime = __le64_to_cpu(super->ctime); |
| } |
| free(super); |
| tst.sb = NULL; |
| break; |
| case 1: return 1; /*bad device */ |
| case 2: break; /* bad, try next */ |
| } |
| } |
| if (bestvers != -1) { |
| int rv; |
| tst.minor_version = bestvers; |
| tst.ss = &super1; |
| tst.max_devs = 384; |
| rv = load_super1(&tst, fd, devname); |
| if (rv == 0) |
| *st = tst; |
| return rv; |
| } |
| return 2; |
| } |
| if (!get_dev_size(fd, devname, &dsize)) |
| return 1; |
| dsize >>= 9; |
| |
| if (dsize < 24) { |
| if (devname) |
| fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n", |
| devname, dsize); |
| return 1; |
| } |
| |
| /* |
| * Calculate the position of the superblock. |
| * It is always aligned to a 4K boundary and |
| * depending on minor_version, it can be: |
| * 0: At least 8K, but less than 12K, from end of device |
| * 1: At start of device |
| * 2: 4K from start of device. |
| */ |
| switch(st->minor_version) { |
| case 0: |
| sb_offset = dsize; |
| sb_offset -= 8*2; |
| sb_offset &= ~(4*2-1); |
| break; |
| case 1: |
| sb_offset = 0; |
| break; |
| case 2: |
| sb_offset = 4*2; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */ |
| |
| |
| if (lseek64(fd, sb_offset << 9, 0)< 0LL) { |
| if (devname) |
| fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", |
| devname, strerror(errno)); |
| return 1; |
| } |
| |
| super = malloc(1024 + sizeof(bitmap_super_t) + |
| sizeof(struct misc_dev_info)); |
| |
| if (read(fd, super, 1024) != 1024) { |
| if (devname) |
| fprintf(stderr, Name ": Cannot read superblock on %s\n", |
| devname); |
| free(super); |
| return 1; |
| } |
| |
| if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { |
| if (devname) |
| fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", |
| devname, MD_SB_MAGIC, __le32_to_cpu(super->magic)); |
| free(super); |
| return 2; |
| } |
| |
| if (__le32_to_cpu(super->major_version) != 1) { |
| if (devname) |
| fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", |
| devname, __le32_to_cpu(super->major_version)); |
| free(super); |
| return 2; |
| } |
| if (__le64_to_cpu(super->super_offset) != sb_offset) { |
| if (devname) |
| fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n", |
| devname); |
| free(super); |
| return 2; |
| } |
| st->sb = super; |
| |
| bsb = (struct bitmap_super_s *)(((char*)super)+1024); |
| |
| misc = (struct misc_dev_info*) (bsb+1); |
| misc->device_size = dsize; |
| |
| /* Now check on the bitmap superblock */ |
| if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 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. |
| */ |
| locate_bitmap1(st, fd); |
| if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s)) |
| != sizeof(struct bitmap_super_s)) |
| goto no_bitmap; |
| |
| uuid_from_super1(st, uuid); |
| if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC || |
| memcmp(bsb->uuid, uuid, 16) != 0) |
| goto no_bitmap; |
| return 0; |
| |
| no_bitmap: |
| super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1); |
| return 0; |
| } |
| |
| |
| static struct supertype *match_metadata_desc1(char *arg) |
| { |
| struct supertype *st = malloc(sizeof(*st)); |
| if (!st) return st; |
| |
| st->ss = &super1; |
| st->max_devs = 384; |
| st->sb = NULL; |
| /* Eliminate pointless leading 0 from some versions of mdadm -D */ |
| if (strncmp(arg, "01.", 3) == 0) |
| arg++; |
| if (strcmp(arg, "1.0") == 0 || |
| strcmp(arg, "1.00") == 0) { |
| st->minor_version = 0; |
| return st; |
| } |
| if (strcmp(arg, "1.1") == 0 || |
| strcmp(arg, "1.01") == 0) { |
| st->minor_version = 1; |
| return st; |
| } |
| if (strcmp(arg, "1.2") == 0 || |
| strcmp(arg, "1.02") == 0) { |
| st->minor_version = 2; |
| return st; |
| } |
| if (strcmp(arg, "1") == 0 || |
| strcmp(arg, "default/large") == 0) { |
| st->minor_version = -1; |
| return st; |
| } |
| |
| free(st); |
| return NULL; |
| } |
| |
| /* find available size on device with this devsize, using |
| * superblock type st, and reserving 'reserve' sectors for |
| * a possible bitmap |
| */ |
| static __u64 avail_size1(struct supertype *st, __u64 devsize, |
| unsigned long reserve_space) |
| { |
| struct mdp_superblock_1 *super = st->sb; |
| if (devsize < 24) |
| return 0; |
| |
| if (super == NULL) |
| /* creating: allow suitable space for bitmap */ |
| devsize -= choose_bm_space(devsize); |
| #ifndef MDASSEMBLE |
| else if (__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) { |
| /* hot-add. allow for actual size of bitmap */ |
| struct bitmap_super_s *bsb; |
| bsb = (struct bitmap_super_s *)(((char*)super)+1024); |
| devsize -= bitmap_sectors(bsb); |
| } |
| #endif |
| |
| switch(st->minor_version) { |
| case -1: /* no specified. Now time to set default */ |
| st->minor_version = 0; |
| /* FALL THROUGH */ |
| case 0: |
| /* at end */ |
| if (reserve_space == 0 && super) |
| reserve_space = __le64_to_cpu(super->data_offset); |
| return ((devsize - 8*2 ) & ~(4*2-1)) - reserve_space; |
| case 1: |
| /* at start, 4K for superblock and possible bitmap */ |
| if (reserve_space == 0 && super) |
| return devsize - __le64_to_cpu(super->data_offset); |
| return devsize - 4*2 - reserve_space; |
| case 2: |
| /* 4k from start, 4K for superblock and possible bitmap */ |
| if (reserve_space == 0 && super) |
| return devsize - __le64_to_cpu(super->data_offset); |
| return devsize - (4+4)*2 - reserve_space; |
| } |
| return 0; |
| } |
| |
| static int |
| add_internal_bitmap1(struct supertype *st, |
| int *chunkp, int delay, int write_behind, |
| unsigned long long size, |
| int may_change, int major) |
| { |
| /* |
| * If not may_change, then this is a 'Grow', and the bitmap |
| * must fit after the superblock. |
| * If may_change, then this is create, and we can put the bitmap |
| * before the superblock if we like, or may move the start. |
| * If !may_change, the bitmap MUST live at offset of 1K, until |
| * we get a sysfs interface. |
| * |
| * size is in sectors, chunk is in bytes !!! |
| */ |
| |
| unsigned long long bits; |
| unsigned long long max_bits; |
| unsigned long long min_chunk; |
| long offset; |
| int chunk = *chunkp; |
| int room = 0; |
| struct mdp_superblock_1 *sb = st->sb; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + 1024); |
| |
| switch(st->minor_version) { |
| case 0: |
| /* either 3K after the superblock, or some amount of space |
| * before. |
| */ |
| if (may_change) { |
| /* We are creating array, so we *know* how much room has |
| * been left. |
| */ |
| offset = 0; |
| room = choose_bm_space(__le64_to_cpu(sb->size)); |
| if (room == 4*2) { |
| /* make it 3K after the superblock */ |
| room = 3*2; |
| offset = 2; |
| } |
| } else { |
| room = __le64_to_cpu(sb->super_offset) |
| - __le64_to_cpu(sb->data_offset) |
| - __le64_to_cpu(sb->data_size); |
| /* remove '1 ||' when we can set offset via sysfs */ |
| if (1 || (room < 3*2 && |
| __le32_to_cpu(sb->max_dev) <= 384)) { |
| room = 3*2; |
| offset = 1*2; |
| } else { |
| offset = 0; /* means movable offset */ |
| } |
| } |
| break; |
| case 1: |
| case 2: /* between superblock and data */ |
| if (may_change) { |
| int room2; |
| /* init_super already set this up */ |
| offset = __le32_to_cpu(sb->bitmap_offset); |
| if (offset == 0) |
| offset = 4*2; |
| room = choose_bm_space(__le64_to_cpu(sb->size)); |
| room2 = __le64_to_cpu(sb->data_offset) - offset; |
| if (room > room2) |
| room = room2; |
| |
| } else { |
| if (__le32_to_cpu(sb->bitmap_offset) < 4*2) { |
| room = __le64_to_cpu(sb->data_offset) |
| - __le64_to_cpu(sb->super_offset); |
| |
| if (1 || __le32_to_cpu(sb->max_dev) <= 384) { |
| room -= 2; |
| offset = 2; |
| } else { |
| room -= 4*2; |
| offset = 4*2; |
| } |
| } else { |
| room = __le64_to_cpu(sb->data_offset) - |
| __le32_to_cpu(sb->bitmap_offset); |
| offset = __le32_to_cpu(sb->bitmap_offset); |
| fprintf(stderr, Name ": adding internal bitmaps " |
| "to array with a reserved offset is not " |
| "yet supported, sorry.\n"); |
| return 0; |
| } |
| } |
| break; |
| default: |
| return 0; |
| } |
| |
| if (chunk == UnSet && room > 128*2) |
| /* Limit to 128K of bitmap when chunk size not requested */ |
| room = 128*2; |
| |
| max_bits = (room * 512 - sizeof(bitmap_super_t)) * 8; |
| |
| 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) |
| chunk = min_chunk; |
| else if (chunk < min_chunk) |
| return 0; /* chunk size too small */ |
| if (chunk == 0) /* rounding problem */ |
| return 0; |
| |
| if (offset == 0) { |
| bits = (size*512) / chunk + 1; |
| room = ((bits+7)/8 + sizeof(bitmap_super_t) +511)/512; |
| offset = -room; |
| } |
| |
| sb->bitmap_offset = __cpu_to_le32(offset); |
| |
| sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | 1); |
| memset(bms, 0, sizeof(*bms)); |
| bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
| bms->version = __cpu_to_le32(major); |
| uuid_from_super1(st, (int*)bms->uuid); |
| 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 1; |
| } |
| |
| |
| static void locate_bitmap1(struct supertype *st, int fd) |
| { |
| unsigned long long offset; |
| struct mdp_superblock_1 *sb; |
| int mustfree = 0; |
| |
| if (!st->sb) { |
| if (st->ss->load_super(st, fd, NULL)) |
| return; /* no error I hope... */ |
| mustfree = 1; |
| } |
| sb = st->sb; |
| |
| offset = __le64_to_cpu(sb->super_offset); |
| offset += (int32_t) __le32_to_cpu(sb->bitmap_offset); |
| if (mustfree) |
| free(sb); |
| lseek64(fd, offset<<9, 0); |
| } |
| |
| static int write_bitmap1(struct supertype *st, int fd) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+1024); |
| int rv = 0; |
| |
| int towrite, n; |
| char buf[4096]; |
| |
| locate_bitmap1(st, fd); |
| |
| if (write(fd, ((char*)sb)+1024, sizeof(bitmap_super_t)) != |
| sizeof(bitmap_super_t)) |
| return -2; |
| towrite = __le64_to_cpu(bms->sync_size) / (__le32_to_cpu(bms->chunksize)>>9); |
| towrite = (towrite+7) >> 3; /* bits to bytes */ |
| memset(buf, 0xff, sizeof(buf)); |
| while (towrite > 0) { |
| n = towrite; |
| if (n > sizeof(buf)) |
| n = sizeof(buf); |
| n = write(fd, buf, n); |
| if (n > 0) |
| towrite -= n; |
| else |
| break; |
| } |
| fsync(fd); |
| if (towrite) |
| rv = -2; |
| |
| return rv; |
| } |
| |
| static void free_super1(struct supertype *st) |
| { |
| if (st->sb) |
| free(st->sb); |
| st->sb = NULL; |
| } |
| |
| struct superswitch super1 = { |
| #ifndef MDASSEMBLE |
| .examine_super = examine_super1, |
| .brief_examine_super = brief_examine_super1, |
| .export_examine_super = export_examine_super1, |
| .detail_super = detail_super1, |
| .brief_detail_super = brief_detail_super1, |
| .export_detail_super = export_detail_super1, |
| #endif |
| .match_home = match_home1, |
| .uuid_from_super = uuid_from_super1, |
| .getinfo_super = getinfo_super1, |
| .update_super = update_super1, |
| .init_super = init_super1, |
| .add_to_super = add_to_super1, |
| .store_super = store_super1, |
| .write_init_super = write_init_super1, |
| .compare_super = compare_super1, |
| .load_super = load_super1, |
| .match_metadata_desc = match_metadata_desc1, |
| .avail_size = avail_size1, |
| .add_internal_bitmap = add_internal_bitmap1, |
| .locate_bitmap = locate_bitmap1, |
| .write_bitmap = write_bitmap1, |
| .free_super = free_super1, |
| .major = 1, |
| #if __BYTE_ORDER == BIG_ENDIAN |
| .swapuuid = 0, |
| #else |
| .swapuuid = 1, |
| #endif |
| }; |