| /* |
| * mdadm - manage Linux "md" devices aka RAID arrays. |
| * |
| * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com> |
| * |
| * |
| * 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> |
| */ |
| |
| #include <stddef.h> |
| #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; /* used for raid5, raid6, raid10, and raid0 */ |
| __u64 size; /* used size of component devices, in 512byte sectors */ |
| |
| __u32 chunksize; /* in 512byte sectors */ |
| __u32 raid_disks; |
| union { |
| __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. |
| */ |
| |
| /* only meaningful when feature_map[MD_FEATURE_PPL] is set */ |
| struct { |
| __s16 offset; /* sectors from start of superblock that ppl starts */ |
| __u16 size; /* ppl size in sectors */ |
| } ppl; |
| }; |
| |
| /* 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 (sectors) */ |
| __u32 new_offset; /* signed number to add to data_offset in new |
| * layout. 0 == no-change. This can be |
| * different on each device in the array. |
| */ |
| |
| /* 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 */ |
| union { |
| __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */ |
| __u64 journal_tail;/* journal tail of journal device (from data_offset) */ |
| }; |
| __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 */ |
| #define FailFast1 2 /* Device should get FailFast requests */ |
| /* bad block log. If there are any bad blocks the feature flag is set. |
| * if offset and size are non-zero, that space is reserved and available. |
| */ |
| __u8 bblog_shift; /* shift from sectors to block size for badblock list */ |
| __u16 bblog_size; /* number of sectors reserved for badblock list */ |
| __u32 bblog_offset; /* sector offset from superblock to bblog, signed */ |
| |
| /* array state information - 64 bytes */ |
| __u64 utime; /* 40 bits second, 24 bits 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 dev_roles[max_dev] */ |
| __u32 max_dev; /* size of dev_roles[] 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 */ |
| }; |
| |
| #define MAX_SB_SIZE 4096 |
| /* bitmap super size is 256, but we round up to a sector for alignment */ |
| #define BM_SUPER_SIZE 512 |
| #define MAX_DEVS ((int)(MAX_SB_SIZE - sizeof(struct mdp_superblock_1)) / 2) |
| #define SUPER1_SIZE (MAX_SB_SIZE + BM_SUPER_SIZE \ |
| + sizeof(struct misc_dev_info)) |
| |
| struct misc_dev_info { |
| __u64 device_size; |
| }; |
| |
| #define MULTIPLE_PPL_AREA_SIZE_SUPER1 (1024 * 1024) /* Size of the whole |
| * mutliple PPL area |
| */ |
| /* 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_BAD_BLOCKS 8 /* badblock list is not empty */ |
| #define MD_FEATURE_REPLACEMENT 16 /* This device is replacing an |
| * active device with same 'role'. |
| * 'recovery_offset' is also set. |
| */ |
| #define MD_FEATURE_RESHAPE_BACKWARDS 32 /* Reshape doesn't change number |
| * of devices, but is going |
| * backwards anyway. |
| */ |
| #define MD_FEATURE_NEW_OFFSET 64 /* new_offset must be honoured */ |
| #define MD_FEATURE_BITMAP_VERSIONED 256 /* bitmap version number checked properly */ |
| #define MD_FEATURE_JOURNAL 512 /* support write journal */ |
| #define MD_FEATURE_PPL 1024 /* support PPL */ |
| #define MD_FEATURE_MUTLIPLE_PPLS 2048 /* support for multiple PPLs */ |
| #define MD_FEATURE_RAID0_LAYOUT 4096 /* layout is meaningful in RAID0 */ |
| #define MD_FEATURE_ALL (MD_FEATURE_BITMAP_OFFSET \ |
| |MD_FEATURE_RECOVERY_OFFSET \ |
| |MD_FEATURE_RESHAPE_ACTIVE \ |
| |MD_FEATURE_BAD_BLOCKS \ |
| |MD_FEATURE_REPLACEMENT \ |
| |MD_FEATURE_RESHAPE_BACKWARDS \ |
| |MD_FEATURE_NEW_OFFSET \ |
| |MD_FEATURE_BITMAP_VERSIONED \ |
| |MD_FEATURE_JOURNAL \ |
| |MD_FEATURE_PPL \ |
| |MD_FEATURE_MULTIPLE_PPLS \ |
| |MD_FEATURE_RAID0_LAYOUT \ |
| ) |
| |
| static int role_from_sb(struct mdp_superblock_1 *sb) |
| { |
| unsigned int d; |
| int role; |
| |
| d = __le32_to_cpu(sb->dev_number); |
| if (d < __le32_to_cpu(sb->max_dev)) |
| role = __le16_to_cpu(sb->dev_roles[d]); |
| else |
| role = MD_DISK_ROLE_SPARE; |
| return role; |
| } |
| |
| /* return how many bytes are needed for bitmap, for cluster-md each node |
| * should have it's own bitmap */ |
| static unsigned int calc_bitmap_size(bitmap_super_t *bms, unsigned int boundary) |
| { |
| unsigned long long bits, bytes; |
| |
| bits = bitmap_bits(__le64_to_cpu(bms->sync_size), |
| __le32_to_cpu(bms->chunksize)); |
| bytes = (bits+7) >> 3; |
| bytes += sizeof(bitmap_super_t); |
| bytes = ROUND_UP(bytes, boundary); |
| |
| return bytes; |
| } |
| |
| 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; |
| |
| /* 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 (; 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); |
| } |
| |
| /* |
| * Information related to file descriptor used for aligned reads/writes. |
| * Cache the block size. |
| */ |
| struct align_fd { |
| int fd; |
| int blk_sz; |
| }; |
| |
| static void init_afd(struct align_fd *afd, int fd) |
| { |
| afd->fd = fd; |
| if (!get_dev_sector_size(afd->fd, NULL, (unsigned int *)&afd->blk_sz)) |
| afd->blk_sz = 512; |
| } |
| |
| static char abuf[4096+4096]; |
| |
| static int aread(struct align_fd *afd, void *buf, int len) |
| { |
| /* aligned read. |
| * On devices with a 4K sector size, we need to read |
| * the full sector and copy relevant bits into |
| * the buffer |
| */ |
| int bsize, iosize; |
| char *b; |
| int n; |
| |
| bsize = afd->blk_sz; |
| |
| if (!bsize || bsize > 4096 || len > 4096) { |
| if (!bsize) |
| fprintf(stderr, "WARNING - aread() called with invalid block size\n"); |
| return -1; |
| } |
| b = ROUND_UP_PTR((char *)abuf, 4096); |
| |
| for (iosize = 0; iosize < len; iosize += bsize) |
| ; |
| n = read(afd->fd, b, iosize); |
| if (n <= 0) |
| return n; |
| lseek(afd->fd, len - n, 1); |
| if (n > len) |
| n = len; |
| memcpy(buf, b, n); |
| return n; |
| } |
| |
| static int awrite(struct align_fd *afd, void *buf, int len) |
| { |
| /* aligned write. |
| * On devices with a 4K sector size, we need to write |
| * the full sector. We pre-read if the sector is larger |
| * than the write. |
| * The address must be sector-aligned. |
| */ |
| int bsize, iosize; |
| char *b; |
| int n; |
| |
| bsize = afd->blk_sz; |
| if (!bsize || bsize > 4096 || len > 4096) { |
| if (!bsize) |
| fprintf(stderr, "WARNING - awrite() called with invalid block size\n"); |
| return -1; |
| } |
| b = ROUND_UP_PTR((char *)abuf, 4096); |
| |
| for (iosize = 0; iosize < len ; iosize += bsize) |
| ; |
| |
| if (len != iosize) { |
| n = read(afd->fd, b, iosize); |
| if (n <= 0) |
| return n; |
| lseek(afd->fd, -n, 1); |
| } |
| |
| memcpy(b, buf, len); |
| n = write(afd->fd, b, iosize); |
| if (n <= 0) |
| return n; |
| lseek(afd->fd, len - n, 1); |
| return len; |
| } |
| |
| static inline unsigned int md_feature_any_ppl_on(__u32 feature_map) |
| { |
| return ((__cpu_to_le32(feature_map) & |
| (MD_FEATURE_PPL | MD_FEATURE_MUTLIPLE_PPLS))); |
| } |
| |
| static inline unsigned int choose_ppl_space(int chunk) |
| { |
| return (PPL_HEADER_SIZE >> 9) + (chunk > 128*2 ? chunk : 128*2); |
| } |
| |
| static void examine_super1(struct supertype *st, char *homehost) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE); |
| time_t atime; |
| unsigned int d; |
| int role; |
| int delta_extra = 0; |
| int i; |
| char *c; |
| int l = homehost ? strlen(homehost) : 0; |
| int layout; |
| unsigned long long sb_offset; |
| struct mdinfo info; |
| int inconsistent = 0; |
| |
| 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"); |
| if (bms->nodes > 0 && |
| (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) |
| printf(" Cluster Name : %-64s\n", bms->cluster_name); |
| 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 sectors%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, ddsks_denom = 1; |
| 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); |
| ddsks_denom = (layout&255) * ((layout>>8)&255); |
| } |
| if (ddsks) { |
| long long asize = __le64_to_cpu(sb->size); |
| asize = (asize << 9) * ddsks / ddsks_denom; |
| printf(" Array Size : %llu KiB%s\n", |
| asize >> 10, human_size(asize)); |
| } |
| if (sb->size != sb->data_size) |
| printf(" Used Dev Size : %llu sectors%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)); |
| if (sb->new_offset && |
| (__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) { |
| unsigned long long offset = __le64_to_cpu(sb->data_offset); |
| offset += (signed)(int32_t)__le32_to_cpu(sb->new_offset); |
| printf(" New Offset : %llu sectors\n", 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)); |
| |
| st->ss->getinfo_super(st, &info, NULL); |
| if (info.space_after != 1 && |
| !(__le32_to_cpu(sb->feature_map) & MD_FEATURE_NEW_OFFSET)) |
| printf(" Unused Space : before=%llu sectors, after=%llu sectors\n", |
| info.space_before, info.space_after); |
| |
| 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)); |
| } else if (md_feature_any_ppl_on(sb->feature_map)) { |
| printf(" PPL : %u sectors at offset %d sectors from superblock\n", |
| __le16_to_cpu(sb->ppl.size), |
| __le16_to_cpu(sb->ppl.offset)); |
| } |
| if (sb->feature_map & __cpu_to_le32(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)); |
| printf(" (%d->%d)\n", |
| __le32_to_cpu(sb->raid_disks) - |
| __le32_to_cpu(sb->delta_disks), |
| __le32_to_cpu(sb->raid_disks)); |
| if ((int)__le32_to_cpu(sb->delta_disks) < 0) |
| delta_extra = -__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) == 6) { |
| c = map_num(r6layout, |
| __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"); |
| if (sb->devflags & FailFast1) |
| printf(" failfast"); |
| printf("\n"); |
| } |
| |
| atime = __le64_to_cpu(sb->utime) & 0xFFFFFFFFFFULL; |
| printf(" Update Time : %.24s\n", ctime(&atime)); |
| |
| if (sb->bblog_size && sb->bblog_offset) { |
| printf(" Bad Block Log : %d entries available at offset %ld sectors", |
| __le16_to_cpu(sb->bblog_size)*512/8, |
| (long)(int32_t)__le32_to_cpu(sb->bblog_offset)); |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS)) |
| printf(" - bad blocks present."); |
| printf("\n"); |
| } |
| |
| 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) == 0 && |
| (sb->feature_map & __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT))) { |
| c = map_num(r0layout, __le32_to_cpu(sb->layout)); |
| printf(" Layout : %s\n", c?c:"-unknown-"); |
| } |
| 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) == 6) { |
| c = map_num(r6layout, __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"); |
| #if 0 |
| /* This turns out to just be confusing */ |
| 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]) != MD_DISK_ROLE_SPARE) |
| break; |
| for (d = 0; d < i; d++) { |
| int role = __le16_to_cpu(sb->dev_roles[d]); |
| if (d) |
| printf(", "); |
| if (role == MD_DISK_ROLE_SPARE) |
| printf("empty"); |
| else |
| if(role == MD_DISK_ROLE_FAULTY) |
| printf("failed"); |
| else |
| printf("%d", role); |
| } |
| printf(")\n"); |
| #endif |
| printf(" Device Role : "); |
| role = role_from_sb(sb); |
| if (role >= MD_DISK_ROLE_FAULTY) |
| printf("spare\n"); |
| else if (role == MD_DISK_ROLE_JOURNAL) |
| printf("Journal\n"); |
| else if (sb->feature_map & __cpu_to_le32(MD_FEATURE_REPLACEMENT)) |
| printf("Replacement device %d\n", role); |
| else |
| printf("Active device %d\n", role); |
| |
| printf(" Array State : "); |
| for (d = 0; d < __le32_to_cpu(sb->raid_disks) + delta_extra; d++) { |
| int cnt = 0; |
| unsigned int i; |
| for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) { |
| unsigned int role = __le16_to_cpu(sb->dev_roles[i]); |
| if (role == d) |
| cnt++; |
| } |
| if (cnt == 2 && __le32_to_cpu(sb->level) > 0) |
| printf("R"); |
| else if (cnt == 1) |
| printf("A"); |
| else if (cnt == 0) |
| printf("."); |
| else { |
| printf("?"); |
| inconsistent = 1; |
| } |
| } |
| #if 0 |
| /* This is confusing too */ |
| faulty = 0; |
| for (i = 0; i< __le32_to_cpu(sb->max_dev); i++) { |
| int role = __le16_to_cpu(sb->dev_roles[i]); |
| if (role == MD_DISK_ROLE_FAULTY) |
| faulty++; |
| } |
| if (faulty) |
| printf(" %d failed", faulty); |
| #endif |
| printf(" ('A' == active, '.' == missing, 'R' == replacing)"); |
| printf("\n"); |
| for (d = 0; d < __le32_to_cpu(sb->max_dev); d++) { |
| unsigned int r = __le16_to_cpu(sb->dev_roles[d]); |
| if (r <= MD_DISK_ROLE_MAX && |
| r > __le32_to_cpu(sb->raid_disks) + delta_extra) |
| inconsistent = 1; |
| } |
| if (inconsistent) { |
| printf("WARNING Array state is inconsistent - each number should appear only once\n"); |
| for (d = 0; d < __le32_to_cpu(sb->max_dev); d++) |
| if (__le16_to_cpu(sb->dev_roles[d]) >= MD_DISK_ROLE_FAULTY) |
| printf(" %d:-", d); |
| else |
| printf(" %d:%d", d, __le16_to_cpu(sb->dev_roles[d])); |
| printf("\n"); |
| } |
| } |
| |
| static void brief_examine_super1(struct supertype *st, int verbose) |
| { |
| 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 = NULL; |
| |
| printf("ARRAY "); |
| if (nm) { |
| printf("/dev/md/"); |
| print_escape(nm); |
| putchar(' '); |
| } |
| if (verbose && c) |
| printf(" level=%s", c); |
| 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 "); |
| if (verbose) |
| printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks)); |
| printf("UUID="); |
| 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="); |
| print_quoted(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; |
| int layout; |
| |
| 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); |
| if (__le32_to_cpu(sb->level) > 0) { |
| int ddsks = 0, ddsks_denom = 1; |
| 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); |
| ddsks_denom = (layout&255) * ((layout>>8)&255); |
| } |
| if (ddsks) { |
| long long asize = __le64_to_cpu(sb->size); |
| asize = (asize << 9) * ddsks / ddsks_denom; |
| printf("MD_ARRAY_SIZE=%s\n", |
| human_size_brief(asize, JEDEC)); |
| } |
| } |
| 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 int copy_metadata1(struct supertype *st, int from, int to) |
| { |
| /* Read superblock. If it looks good, write it out. |
| * Then if a bitmap is present, copy that. |
| * And if a bad-block-list is present, copy that too. |
| */ |
| void *buf; |
| unsigned long long dsize, sb_offset; |
| const int bufsize = 4*1024; |
| struct mdp_superblock_1 super, *sb; |
| |
| if (posix_memalign(&buf, 4096, bufsize) != 0) |
| return 1; |
| |
| if (!get_dev_size(from, NULL, &dsize)) |
| goto err; |
| |
| dsize >>= 9; |
| if (dsize < 24) |
| goto err; |
| 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: |
| goto err; |
| } |
| |
| if (lseek64(from, sb_offset << 9, 0) < 0LL) |
| goto err; |
| if (read(from, buf, bufsize) != bufsize) |
| goto err; |
| |
| sb = buf; |
| super = *sb; // save most of sb for when we reuse buf |
| |
| if (__le32_to_cpu(super.magic) != MD_SB_MAGIC || |
| __le32_to_cpu(super.major_version) != 1 || |
| __le64_to_cpu(super.super_offset) != sb_offset || |
| calc_sb_1_csum(sb) != super.sb_csum) |
| goto err; |
| |
| if (lseek64(to, sb_offset << 9, 0) < 0LL) |
| goto err; |
| if (write(to, buf, bufsize) != bufsize) |
| goto err; |
| |
| if (super.feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) { |
| unsigned long long bitmap_offset = sb_offset; |
| int bytes = 4096; // just an estimate. |
| int written = 0; |
| struct align_fd afrom, ato; |
| |
| init_afd(&afrom, from); |
| init_afd(&ato, to); |
| |
| bitmap_offset += (int32_t)__le32_to_cpu(super.bitmap_offset); |
| |
| if (lseek64(from, bitmap_offset<<9, 0) < 0) |
| goto err; |
| if (lseek64(to, bitmap_offset<<9, 0) < 0) |
| goto err; |
| |
| for (written = 0; written < bytes ; ) { |
| int n = bytes - written; |
| if (n > 4096) |
| n = 4096; |
| if (aread(&afrom, buf, n) != n) |
| goto err; |
| if (written == 0) { |
| /* have the header, can calculate |
| * correct bitmap bytes */ |
| bitmap_super_t *bms; |
| bms = (void*)buf; |
| bytes = calc_bitmap_size(bms, 512); |
| if (n > bytes) |
| n = bytes; |
| } |
| if (awrite(&ato, buf, n) != n) |
| goto err; |
| written += n; |
| } |
| } |
| |
| if (super.bblog_size != 0 && |
| __le16_to_cpu(super.bblog_size) <= 100 && |
| super.bblog_offset != 0 && |
| (super.feature_map & __le32_to_cpu(MD_FEATURE_BAD_BLOCKS))) { |
| /* There is a bad block log */ |
| unsigned long long bb_offset = sb_offset; |
| int bytes = __le16_to_cpu(super.bblog_size) * 512; |
| int written = 0; |
| struct align_fd afrom, ato; |
| |
| init_afd(&afrom, from); |
| init_afd(&ato, to); |
| |
| bb_offset += (int32_t)__le32_to_cpu(super.bblog_offset); |
| |
| if (lseek64(from, bb_offset<<9, 0) < 0) |
| goto err; |
| if (lseek64(to, bb_offset<<9, 0) < 0) |
| goto err; |
| |
| for (written = 0; written < bytes ; ) { |
| int n = bytes - written; |
| if (n > 4096) |
| n = 4096; |
| if (aread(&afrom, buf, n) != n) |
| goto err; |
| |
| if (awrite(&ato, buf, n) != n) |
| goto err; |
| written += n; |
| } |
| } |
| |
| free(buf); |
| return 0; |
| |
| err: |
| free(buf); |
| return 1; |
| } |
| |
| static void detail_super1(struct supertype *st, char *homehost, char *subarray) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE); |
| 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); |
| if (bms->nodes > 0 && |
| (__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) |
| printf("\n Cluster Name : %-64s", bms->cluster_name); |
| 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, char *subarray) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| int i; |
| |
| if (sb->set_name[0]) { |
| printf(" name="); |
| print_quoted(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); |
| } |
| |
| static int examine_badblocks_super1(struct supertype *st, int fd, char *devname) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| unsigned long long offset; |
| int size; |
| __u64 *bbl, *bbp; |
| int i; |
| |
| if (!sb->bblog_size || __le16_to_cpu(sb->bblog_size) > 100 || |
| !sb->bblog_offset){ |
| printf("No bad-blocks list configured on %s\n", devname); |
| return 0; |
| } |
| if ((sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS)) == 0) { |
| printf("Bad-blocks list is empty in %s\n", devname); |
| return 0; |
| } |
| |
| size = __le16_to_cpu(sb->bblog_size)* 512; |
| if (posix_memalign((void**)&bbl, 4096, size) != 0) { |
| pr_err("could not allocate badblocks list\n"); |
| return 0; |
| } |
| offset = __le64_to_cpu(sb->super_offset) + |
| (int)__le32_to_cpu(sb->bblog_offset); |
| offset <<= 9; |
| if (lseek64(fd, offset, 0) < 0) { |
| pr_err("Cannot seek to bad-blocks list\n"); |
| return 1; |
| } |
| if (read(fd, bbl, size) != size) { |
| pr_err("Cannot read bad-blocks list\n"); |
| return 1; |
| } |
| /* 64bits per entry. 10 bits is block-count, 54 bits is block |
| * offset. Blocks are sectors unless bblog->shift makes them bigger |
| */ |
| bbp = (__u64*)bbl; |
| printf("Bad-blocks on %s:\n", devname); |
| for (i = 0; i < size/8; i++, bbp++) { |
| __u64 bb = __le64_to_cpu(*bbp); |
| int count = bb & 0x3ff; |
| unsigned long long sector = bb >> 10; |
| |
| if (bb + 1 == 0) |
| break; |
| |
| sector <<= sb->bblog_shift; |
| count <<= sb->bblog_shift; |
| |
| printf("%20llu for %d sectors\n", sector, count); |
| } |
| return 0; |
| } |
| |
| 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, char *map) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| struct bitmap_super_s *bsb = (void*)(((char*)sb)+MAX_SB_SIZE); |
| struct misc_dev_info *misc = |
| (void*)(((char*)sb)+MAX_SB_SIZE+BM_SUPER_SIZE); |
| int working = 0; |
| unsigned int i; |
| unsigned int role; |
| unsigned int map_disks = info->array.raid_disks; |
| unsigned long long super_offset; |
| unsigned long long data_size; |
| |
| memset(info, 0, sizeof(*info)); |
| info->array.major_version = 1; |
| info->array.minor_version = st->minor_version; |
| 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) == MaxSector) ? 1 : 0; |
| |
| super_offset = __le64_to_cpu(sb->super_offset); |
| info->data_offset = __le64_to_cpu(sb->data_offset); |
| info->component_size = __le64_to_cpu(sb->size); |
| if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) { |
| info->bitmap_offset = (int32_t)__le32_to_cpu(sb->bitmap_offset); |
| if (__le32_to_cpu(bsb->nodes) > 1) |
| info->array.state |= (1 << MD_SB_CLUSTERED); |
| } else if (md_feature_any_ppl_on(sb->feature_map)) { |
| info->ppl_offset = __le16_to_cpu(sb->ppl.offset); |
| info->ppl_size = __le16_to_cpu(sb->ppl.size); |
| info->ppl_sector = super_offset + info->ppl_offset; |
| } |
| |
| 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->dev_number) >= MAX_DEVS) |
| role = MD_DISK_ROLE_FAULTY; |
| else |
| role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]); |
| |
| if (info->array.level <= 0) |
| data_size = __le64_to_cpu(sb->data_size); |
| else |
| data_size = __le64_to_cpu(sb->size); |
| if (info->data_offset < super_offset) { |
| unsigned long long end; |
| info->space_before = info->data_offset; |
| end = super_offset; |
| |
| if (sb->bblog_offset && sb->bblog_size) { |
| unsigned long long bboffset = super_offset; |
| bboffset += (int32_t)__le32_to_cpu(sb->bblog_offset); |
| if (bboffset < end) |
| end = bboffset; |
| } |
| |
| if (super_offset + info->bitmap_offset + info->ppl_offset < end) |
| end = super_offset + info->bitmap_offset + |
| info->ppl_offset; |
| |
| if (info->data_offset + data_size < end) |
| info->space_after = end - data_size - info->data_offset; |
| else |
| info->space_after = 0; |
| } else { |
| unsigned long long earliest; |
| earliest = super_offset + (32+4)*2; /* match kernel */ |
| if (info->bitmap_offset > 0) { |
| unsigned long long bmend = info->bitmap_offset; |
| unsigned long long size = calc_bitmap_size(bsb, 4096); |
| size /= 512; |
| bmend += size; |
| if (bmend > earliest) |
| earliest = bmend; |
| } else if (info->ppl_offset > 0) { |
| unsigned long long pplend; |
| |
| pplend = info->ppl_offset + info->ppl_size; |
| if (pplend > earliest) |
| earliest = pplend; |
| } |
| if (sb->bblog_offset && sb->bblog_size) { |
| unsigned long long bbend = super_offset; |
| bbend += (int32_t)__le32_to_cpu(sb->bblog_offset); |
| bbend += __le16_to_cpu(sb->bblog_size); |
| if (bbend > earliest) |
| earliest = bbend; |
| } |
| if (earliest < info->data_offset) |
| info->space_before = info->data_offset - earliest; |
| else |
| info->space_before = 0; |
| info->space_after = misc->device_size - data_size - |
| info->data_offset; |
| } |
| if (info->space_before == 0 && info->space_after == 0) { |
| /* It will look like we don't support data_offset changes, |
| * be we do - it's just that there is no room. |
| * A change that reduced the number of devices should |
| * still be allowed, so set the otherwise useless value of '1' |
| */ |
| info->space_after = 1; |
| } |
| |
| info->disk.raid_disk = -1; |
| switch(role) { |
| case MD_DISK_ROLE_SPARE: |
| /* spare: not active, not sync, not faulty */ |
| info->disk.state = 0; |
| break; |
| case MD_DISK_ROLE_FAULTY: |
| info->disk.state = (1 << MD_DISK_FAULTY); /* faulty */ |
| break; |
| case MD_DISK_ROLE_JOURNAL: |
| info->disk.state = (1 << MD_DISK_JOURNAL); |
| info->disk.raid_disk = role; |
| /* journal uses all 4kB blocks*/ |
| info->space_after = (misc->device_size - info->data_offset) % 8; |
| break; |
| default: |
| info->disk.state = 6; /* active and in sync */ |
| info->disk.raid_disk = role; |
| } |
| if (sb->devflags & WriteMostly1) |
| info->disk.state |= (1 << MD_DISK_WRITEMOSTLY); |
| if (sb->devflags & FailFast1) |
| info->disk.state |= (1 << MD_DISK_FAILFAST); |
| info->events = __le64_to_cpu(sb->events); |
| sprintf(info->text_version, "1.%d", st->minor_version); |
| info->safe_mode_delay = 200; |
| |
| memcpy(info->uuid, sb->set_uuid, 16); |
| |
| strncpy(info->name, sb->set_name, 32); |
| info->name[32] = 0; |
| |
| if ((__le32_to_cpu(sb->feature_map)&MD_FEATURE_REPLACEMENT)) { |
| info->disk.state &= ~(1 << MD_DISK_SYNC); |
| info->disk.state |= 1 << MD_DISK_REPLACEMENT; |
| } |
| |
| if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RECOVERY_OFFSET)) |
| info->recovery_start = __le32_to_cpu(sb->recovery_offset); |
| else |
| info->recovery_start = MaxSector; |
| |
| if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) { |
| info->reshape_active = 1; |
| if ((sb->feature_map & __le32_to_cpu(MD_FEATURE_NEW_OFFSET)) && |
| sb->new_offset != 0) |
| info->reshape_active |= RESHAPE_NO_BACKUP; |
| 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; |
| if (info->delta_disks < 0) |
| info->array.raid_disks -= info->delta_disks; |
| } else |
| info->reshape_active = 0; |
| |
| info->recovery_blocked = info->reshape_active; |
| |
| if (map) |
| for (i=0; i<map_disks; i++) |
| map[i] = 0; |
| for (i = 0; i < __le32_to_cpu(sb->max_dev); i++) { |
| role = __le16_to_cpu(sb->dev_roles[i]); |
| if (/*role == MD_DISK_ROLE_SPARE || */role < (unsigned) info->array.raid_disks) { |
| working++; |
| if (map && role < map_disks) |
| map[role] = 1; |
| } |
| } |
| |
| info->array.working_disks = working; |
| |
| if (sb->feature_map & __le32_to_cpu(MD_FEATURE_JOURNAL)) { |
| info->journal_device_required = 1; |
| info->consistency_policy = CONSISTENCY_POLICY_JOURNAL; |
| } else if (md_feature_any_ppl_on(sb->feature_map)) { |
| info->consistency_policy = CONSISTENCY_POLICY_PPL; |
| } else if (sb->feature_map & __le32_to_cpu(MD_FEATURE_BITMAP_OFFSET)) { |
| info->consistency_policy = CONSISTENCY_POLICY_BITMAP; |
| } else if (info->array.level <= 0) { |
| info->consistency_policy = CONSISTENCY_POLICY_NONE; |
| } else { |
| info->consistency_policy = CONSISTENCY_POLICY_RESYNC; |
| } |
| |
| info->journal_clean = 0; |
| } |
| |
| static struct mdinfo *container_content1(struct supertype *st, char *subarray) |
| { |
| struct mdinfo *info; |
| |
| if (subarray) |
| return NULL; |
| |
| info = xmalloc(sizeof(*info)); |
| getinfo_super1(st, info, NULL); |
| return info; |
| } |
| |
| 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; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE); |
| |
| if (strcmp(update, "homehost") == 0 && |
| homehost) { |
| /* Note that 'homehost' is special as it is really |
| * a "name" update. |
| */ |
| 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, "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); |
| } else 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 4: |
| case 5: |
| case 6: |
| /* need to force clean */ |
| if (sb->resync_offset != MaxSector) |
| rv = 1; |
| sb->resync_offset = MaxSector; |
| } |
| } else if (strcmp(update, "assemble")==0) { |
| int d = info->disk.number; |
| int want; |
| if (info->disk.state & (1<<MD_DISK_ACTIVE)) |
| want = info->disk.raid_disk; |
| else if (info->disk.state & (1<<MD_DISK_JOURNAL)) |
| want = MD_DISK_ROLE_JOURNAL; |
| else |
| want = MD_DISK_ROLE_SPARE; |
| if (sb->dev_roles[d] != __cpu_to_le16(want)) { |
| sb->dev_roles[d] = __cpu_to_le16(want); |
| rv = 1; |
| } |
| if (info->reshape_active && |
| sb->feature_map & |
| __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && |
| info->delta_disks >= 0 && |
| info->reshape_progress < |
| __le64_to_cpu(sb->reshape_position)) { |
| sb->reshape_position = |
| __cpu_to_le64(info->reshape_progress); |
| rv = 1; |
| } |
| if (info->reshape_active && |
| sb->feature_map & |
| __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE) && |
| info->delta_disks < 0 && |
| info->reshape_progress > |
| __le64_to_cpu(sb->reshape_position)) { |
| sb->reshape_position = |
| __cpu_to_le64(info->reshape_progress); |
| rv = 1; |
| } |
| } else if (strcmp(update, "linear-grow-new") == 0) { |
| int i; |
| int fd; |
| int max = __le32_to_cpu(sb->max_dev); |
| |
| if (max > MAX_DEVS) |
| return -2; |
| |
| for (i = 0; i < max; i++) |
| if (__le16_to_cpu(sb->dev_roles[i]) >= |
| MD_DISK_ROLE_FAULTY) |
| break; |
| if (i != info->disk.number) |
| return -2; |
| sb->dev_number = __cpu_to_le32(i); |
| |
| if (i == max) |
| sb->max_dev = __cpu_to_le32(max+1); |
| if (i > max) |
| return -2; |
| |
| random_uuid(sb->device_uuid); |
| |
| 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)); |
| } |
| } |
| } else if (strcmp(update, "linear-grow-update") == 0) { |
| int max = __le32_to_cpu(sb->max_dev); |
| int i = info->disk.number; |
| if (max > MAX_DEVS || i > MAX_DEVS) |
| return -2; |
| if (i > max) |
| return -2; |
| if (i == max) |
| sb->max_dev = __cpu_to_le32(max+1); |
| sb->raid_disks = __cpu_to_le32(info->array.raid_disks); |
| sb->dev_roles[info->disk.number] = |
| __cpu_to_le16(info->disk.raid_disk); |
| } else if (strcmp(update, "resync") == 0) { |
| /* make sure resync happens */ |
| sb->resync_offset = 0ULL; |
| } else 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) |
| memcpy(bms->uuid, sb->set_uuid, 16); |
| } else if (strcmp(update, "no-bitmap") == 0) { |
| sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); |
| if (bms->version == BITMAP_MAJOR_CLUSTERED && !IsBitmapDirty(devname)) |
| sb->resync_offset = MaxSector; |
| } else if (strcmp(update, "bbl") == 0) { |
| /* only possible if there is room after the bitmap, or if |
| * there is no bitmap |
| */ |
| unsigned long long sb_offset = __le64_to_cpu(sb->super_offset); |
| unsigned long long data_offset = __le64_to_cpu(sb->data_offset); |
| long bitmap_offset = 0; |
| long bm_sectors = 0; |
| long space; |
| |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
| bitmap_offset = (long)__le32_to_cpu(sb->bitmap_offset); |
| bm_sectors = calc_bitmap_size(bms, 4096) >> 9; |
| } else if (md_feature_any_ppl_on(sb->feature_map)) { |
| bitmap_offset = (long)__le16_to_cpu(sb->ppl.offset); |
| bm_sectors = (long)__le16_to_cpu(sb->ppl.size); |
| } |
| |
| if (sb_offset < data_offset) { |
| /* |
| * 1.1 or 1.2. Put bbl after bitmap leaving |
| * at least 32K |
| */ |
| long bb_offset; |
| bb_offset = sb_offset + 8; |
| if (bm_sectors && bitmap_offset > 0) |
| bb_offset = bitmap_offset + bm_sectors; |
| while (bb_offset < (long)sb_offset + 8 + 32*2 && |
| bb_offset + 8+8 <= (long)data_offset) |
| /* too close to bitmap, and room to grow */ |
| bb_offset += 8; |
| if (bb_offset + 8 <= (long)data_offset) { |
| sb->bblog_size = __cpu_to_le16(8); |
| sb->bblog_offset = __cpu_to_le32(bb_offset); |
| } |
| } else { |
| /* 1.0 - Put bbl just before super block */ |
| if (bm_sectors && bitmap_offset < 0) |
| space = -bitmap_offset - bm_sectors; |
| else |
| space = sb_offset - data_offset - |
| __le64_to_cpu(sb->data_size); |
| if (space >= 8) { |
| sb->bblog_size = __cpu_to_le16(8); |
| sb->bblog_offset = __cpu_to_le32((unsigned)-8); |
| } |
| } |
| } else if (strcmp(update, "no-bbl") == 0) { |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BAD_BLOCKS)) |
| pr_err("Cannot remove active bbl from %s\n",devname); |
| else { |
| sb->bblog_size = 0; |
| sb->bblog_shift = 0; |
| sb->bblog_offset = 0; |
| } |
| } else if (strcmp(update, "force-no-bbl") == 0) { |
| sb->feature_map &= ~ __cpu_to_le32(MD_FEATURE_BAD_BLOCKS); |
| sb->bblog_size = 0; |
| sb->bblog_shift = 0; |
| sb->bblog_offset = 0; |
| } else if (strcmp(update, "ppl") == 0) { |
| unsigned long long sb_offset = __le64_to_cpu(sb->super_offset); |
| unsigned long long data_offset = __le64_to_cpu(sb->data_offset); |
| unsigned long long data_size = __le64_to_cpu(sb->data_size); |
| long bb_offset = __le32_to_cpu(sb->bblog_offset); |
| int space; |
| int offset; |
| |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
| pr_err("Cannot add PPL to array with bitmap\n"); |
| return -2; |
| } |
| |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_JOURNAL)) { |
| pr_err("Cannot add PPL to array with journal\n"); |
| return -2; |
| } |
| |
| if (sb_offset < data_offset) { |
| if (bb_offset) |
| space = bb_offset - 8; |
| else |
| space = data_offset - sb_offset - 8; |
| offset = 8; |
| } else { |
| offset = -(sb_offset - data_offset - data_size); |
| if (offset < INT16_MIN) |
| offset = INT16_MIN; |
| space = -(offset - bb_offset); |
| } |
| |
| if (space < (PPL_HEADER_SIZE >> 9) + 8) { |
| pr_err("Not enough space to add ppl\n"); |
| return -2; |
| } |
| |
| if (space >= (MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9)) { |
| space = (MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9); |
| } else { |
| int optimal_space = choose_ppl_space( |
| __le32_to_cpu(sb->chunksize)); |
| if (space > optimal_space) |
| space = optimal_space; |
| if (space > UINT16_MAX) |
| space = UINT16_MAX; |
| } |
| |
| sb->ppl.offset = __cpu_to_le16(offset); |
| sb->ppl.size = __cpu_to_le16(space); |
| sb->feature_map |= __cpu_to_le32(MD_FEATURE_PPL); |
| } else if (strcmp(update, "no-ppl") == 0) { |
| sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_PPL | |
| MD_FEATURE_MUTLIPLE_PPLS); |
| } else 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 { |
| int namelen; |
| |
| namelen = min((int)strlen(info->name), |
| (int)sizeof(sb->set_name) - 1); |
| memcpy(sb->set_name, info->name, namelen); |
| memset(&sb->set_name[namelen], '\0', |
| sizeof(sb->set_name) - namelen); |
| } |
| } else 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 + MAX_SB_SIZE + BM_SUPER_SIZE); |
| sb->data_size = __cpu_to_le64( |
| misc->device_size - __le64_to_cpu(sb->data_offset)); |
| } else if (strncmp(update, "revert-reshape", 14) == 0) { |
| rv = -2; |
| if (!(sb->feature_map & |
| __cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE))) |
| pr_err("No active reshape to revert on %s\n", |
| devname); |
| else { |
| __u32 temp; |
| unsigned long long reshape_sectors; |
| long reshape_chunk; |
| rv = 0; |
| /* If the reshape hasn't started, just stop it. |
| * It is conceivable that a stripe was modified but |
| * the metadata not updated. In that case the backup |
| * should have been used to get passed the critical stage. |
| * If that couldn't happen, the "-nobackup" version |
| * will be used. |
| */ |
| if (strcmp(update, "revert-reshape-nobackup") == 0 && |
| sb->reshape_position == 0 && |
| (__le32_to_cpu(sb->delta_disks) > 0 || |
| (__le32_to_cpu(sb->delta_disks) == 0 && |
| !(sb->feature_map & __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS))))) { |
| sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_RESHAPE_ACTIVE); |
| sb->raid_disks = __cpu_to_le32(__le32_to_cpu(sb->raid_disks) - |
| __le32_to_cpu(sb->delta_disks)); |
| sb->delta_disks = 0; |
| goto done; |
| } |
| /* reshape_position is a little messy. |
| * Its value must be a multiple of the larger |
| * chunk size, and of the "after" data disks. |
| * So when reverting we need to change it to |
| * be a multiple of the new "after" data disks, |
| * which is the old "before". |
| * If it isn't already a multiple of 'before', |
| * the only thing we could do would be |
| * copy some block around on the disks, which |
| * is easy to get wrong. |
| * So we reject a revert-reshape unless the |
| * alignment is good. |
| */ |
| if (__le32_to_cpu(sb->level) >= 4 && |
| __le32_to_cpu(sb->level) <= 6) { |
| reshape_sectors = |
| __le64_to_cpu(sb->reshape_position); |
| reshape_chunk = __le32_to_cpu(sb->new_chunk); |
| reshape_chunk *= __le32_to_cpu(sb->raid_disks) - |
| __le32_to_cpu(sb->delta_disks) - |
| (__le32_to_cpu(sb->level)==6 ? 2 : 1); |
| if (reshape_sectors % reshape_chunk) { |
| pr_err("Reshape position is not suitably aligned.\n"); |
| pr_err("Try normal assembly and stop again\n"); |
| return -2; |
| } |
| } |
| sb->raid_disks = |
| __cpu_to_le32(__le32_to_cpu(sb->raid_disks) - |
| __le32_to_cpu(sb->delta_disks)); |
| if (sb->delta_disks == 0) |
| sb->feature_map ^= __cpu_to_le32(MD_FEATURE_RESHAPE_BACKWARDS); |
| else |
| sb->delta_disks = __cpu_to_le32(-__le32_to_cpu(sb->delta_disks)); |
| |
| temp = sb->new_layout; |
| sb->new_layout = sb->layout; |
| sb->layout = temp; |
| |
| temp = sb->new_chunk; |
| sb->new_chunk = sb->chunksize; |
| sb->chunksize = temp; |
| |
| if (sb->feature_map & |
| __cpu_to_le32(MD_FEATURE_NEW_OFFSET)) { |
| long offset_delta = |
| (int32_t)__le32_to_cpu(sb->new_offset); |
| sb->data_offset = __cpu_to_le64(__le64_to_cpu(sb->data_offset) + offset_delta); |
| sb->new_offset = __cpu_to_le32(-offset_delta); |
| sb->data_size = __cpu_to_le64(__le64_to_cpu(sb->data_size) - offset_delta); |
| } |
| done:; |
| } |
| } else if (strcmp(update, "_reshape_progress") == 0) |
| sb->reshape_position = __cpu_to_le64(info->reshape_progress); |
| else if (strcmp(update, "writemostly") == 0) |
| sb->devflags |= WriteMostly1; |
| else if (strcmp(update, "readwrite") == 0) |
| sb->devflags &= ~WriteMostly1; |
| else if (strcmp(update, "failfast") == 0) |
| sb->devflags |= FailFast1; |
| else if (strcmp(update, "nofailfast") == 0) |
| sb->devflags &= ~FailFast1; |
| else if (strcmp(update, "layout-original") == 0 || |
| strcmp(update, "layout-alternate") == 0 || |
| strcmp(update, "layout-unspecified") == 0) { |
| if (__le32_to_cpu(sb->level) != 0) { |
| pr_err("%s: %s only supported for RAID0\n", |
| devname?:"", update); |
| rv = -1; |
| } else if (strcmp(update, "layout-unspecified") == 0) { |
| sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_RAID0_LAYOUT); |
| sb->layout = 0; |
| } else { |
| sb->feature_map |= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT); |
| sb->layout = __cpu_to_le32(update[7] == 'o' ? 1 : 2); |
| } |
| } else |
| rv = -1; |
| |
| sb->sb_csum = calc_sb_1_csum(sb); |
| |
| return rv; |
| } |
| |
| static int init_super1(struct supertype *st, mdu_array_info_t *info, |
| struct shape *s, char *name, char *homehost, |
| int *uuid, unsigned long long data_offset) |
| { |
| struct mdp_superblock_1 *sb; |
| int spares; |
| char defname[10]; |
| int sbsize; |
| |
| if (posix_memalign((void**)&sb, 4096, SUPER1_SIZE) != 0) { |
| pr_err("could not allocate superblock\n"); |
| return 0; |
| } |
| memset(sb, 0, SUPER1_SIZE); |
| |
| st->sb = sb; |
| if (info == NULL) { |
| /* zeroing superblock */ |
| return 0; |
| } |
| |
| spares = info->working_disks - info->active_disks; |
| if (info->raid_disks + spares > MAX_DEVS) { |
| pr_err("too many devices requested: %d+%d > %d\n", |
| info->raid_disks , spares, MAX_DEVS); |
| 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 |
| random_uuid(sb->set_uuid);; |
| |
| if (name == NULL || *name == 0) { |
| sprintf(defname, "%d", info->md_minor); |
| name = defname; |
| } |
| 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 { |
| int namelen; |
| |
| namelen = min((int)strlen(name), |
| (int)sizeof(sb->set_name) - 1); |
| memcpy(sb->set_name, name, namelen); |
| memset(&sb->set_name[namelen], '\0', |
| sizeof(sb->set_name) - namelen); |
| } |
| |
| 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(s->size*2ULL); |
| sb->chunksize = __cpu_to_le32(info->chunk_size>>9); |
| sb->raid_disks = __cpu_to_le32(info->raid_disks); |
| |
| sb->data_offset = __cpu_to_le64(data_offset); |
| sb->data_size = __cpu_to_le64(0); |
| sb->super_offset = __cpu_to_le64(0); |
| sb->recovery_offset = __cpu_to_le64(0); |
| |
| sb->utime = sb->ctime; |
| sb->events = __cpu_to_le64(1); |
| if (info->state & (1<<MD_SB_CLEAN)) |
| sb->resync_offset = MaxSector; |
| else |
| sb->resync_offset = 0; |
| sbsize = sizeof(struct mdp_superblock_1) + |
| 2 * (info->raid_disks + spares); |
| sbsize = ROUND_UP(sbsize, 512); |
| sb->max_dev = |
| __cpu_to_le32((sbsize - sizeof(struct mdp_superblock_1)) / 2); |
| |
| memset(sb->dev_roles, 0xff, |
| MAX_SB_SIZE - sizeof(struct mdp_superblock_1)); |
| |
| if (s->consistency_policy == CONSISTENCY_POLICY_PPL) |
| sb->feature_map |= __cpu_to_le32(MD_FEATURE_PPL); |
| |
| return 1; |
| } |
| |
| struct devinfo { |
| int fd; |
| char *devname; |
| long long data_offset; |
| unsigned long long dev_size; |
| mdu_disk_info_t disk; |
| struct devinfo *next; |
| }; |
| |
| /* Add a device to the superblock being created */ |
| static int add_to_super1(struct supertype *st, mdu_disk_info_t *dk, |
| int fd, char *devname, unsigned long long data_offset) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| __u16 *rp = sb->dev_roles + dk->number; |
| struct devinfo *di, **dip; |
| int dk_state; |
| |
| dk_state = dk->state & ~(1<<MD_DISK_FAILFAST); |
| if ((dk_state & (1<<MD_DISK_ACTIVE)) && |
| (dk_state & (1<<MD_DISK_SYNC)))/* active, sync */ |
| *rp = __cpu_to_le16(dk->raid_disk); |
| else if (dk_state & (1<<MD_DISK_JOURNAL)) |
| *rp = MD_DISK_ROLE_JOURNAL; |
| else if ((dk_state & ~(1<<MD_DISK_ACTIVE)) == 0) |
| /* active or idle -> spare */ |
| *rp = MD_DISK_ROLE_SPARE; |
| else |
| *rp = MD_DISK_ROLE_FAULTY; |
| |
| if (dk->number >= (int)__le32_to_cpu(sb->max_dev) && |
| __le32_to_cpu(sb->max_dev) < MAX_DEVS) |
| sb->max_dev = __cpu_to_le32(dk->number+1); |
| |
| sb->dev_number = __cpu_to_le32(dk->number); |
| sb->devflags = 0; /* don't copy another disks flags */ |
| sb->sb_csum = calc_sb_1_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 = *dk; |
| di->data_offset = data_offset; |
| get_dev_size(fd, NULL, &di->dev_size); |
| di->next = NULL; |
| *dip = di; |
| |
| return 0; |
| } |
| |
| static int locate_bitmap1(struct supertype *st, int fd, int node_num); |
| |
| static int store_super1(struct supertype *st, int fd) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| unsigned long long sb_offset; |
| struct align_fd afd; |
| int sbsize; |
| unsigned long long dsize; |
| |
| if (!get_dev_size(fd, NULL, &dsize)) |
| return 1; |
| |
| dsize >>= 9; |
| |
| if (dsize < 24) |
| return 2; |
| |
| init_afd(&afd, fd); |
| |
| /* |
| * 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) |
| ) { |
| pr_err("internal error - sb_offset is wrong\n"); |
| abort(); |
| } |
| |
| if (lseek64(fd, sb_offset << 9, 0)< 0LL) |
| return 3; |
| |
| sbsize = ROUND_UP(sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev), 512); |
| |
| if (awrite(&afd, 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)+MAX_SB_SIZE); |
| if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) { |
| locate_bitmap1(st, fd, 0); |
| if (awrite(&afd, bm, sizeof(*bm)) != sizeof(*bm)) |
| return 5; |
| } |
| } |
| fsync(fd); |
| |
| return 0; |
| } |
| |
| static int load_super1(struct supertype *st, int fd, char *devname); |
| |
| 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 |
| * NOTE: result must be multiple of 4K else bad things happen |
| * on 4K-sector devices. |
| */ |
| 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 void free_super1(struct supertype *st); |
| |
| __u32 crc32c_le(__u32 crc, unsigned char const *p, size_t len); |
| |
| static int write_init_ppl1(struct supertype *st, struct mdinfo *info, int fd) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| void *buf; |
| struct ppl_header *ppl_hdr; |
| int ret; |
| |
| /* first clear entire ppl space */ |
| ret = zero_disk_range(fd, info->ppl_sector, info->ppl_size); |
| if (ret) |
| return ret; |
| |
| ret = posix_memalign(&buf, 4096, PPL_HEADER_SIZE); |
| if (ret) { |
| pr_err("Failed to allocate PPL header buffer\n"); |
| return ret; |
| } |
| |
| memset(buf, 0, PPL_HEADER_SIZE); |
| ppl_hdr = buf; |
| memset(ppl_hdr->reserved, 0xff, PPL_HDR_RESERVED); |
| ppl_hdr->signature = __cpu_to_le32(~crc32c_le(~0, sb->set_uuid, |
| sizeof(sb->set_uuid))); |
| ppl_hdr->checksum = __cpu_to_le32(~crc32c_le(~0, buf, PPL_HEADER_SIZE)); |
| |
| if (lseek64(fd, info->ppl_sector * 512, SEEK_SET) < 0) { |
| ret = errno; |
| perror("Failed to seek to PPL header location"); |
| } |
| |
| if (!ret && write(fd, buf, PPL_HEADER_SIZE) != PPL_HEADER_SIZE) { |
| ret = errno; |
| perror("Write PPL header failed"); |
| } |
| |
| if (!ret) |
| fsync(fd); |
| |
| free(buf); |
| return ret; |
| } |
| |
| #define META_BLOCK_SIZE 4096 |
| |
| static int write_empty_r5l_meta_block(struct supertype *st, int fd) |
| { |
| struct r5l_meta_block *mb; |
| struct mdp_superblock_1 *sb = st->sb; |
| struct align_fd afd; |
| __u32 crc; |
| |
| init_afd(&afd, fd); |
| |
| if (posix_memalign((void**)&mb, 4096, META_BLOCK_SIZE) != 0) { |
| pr_err("Could not allocate memory for the meta block.\n"); |
| return 1; |
| } |
| |
| memset(mb, 0, META_BLOCK_SIZE); |
| |
| mb->magic = __cpu_to_le32(R5LOG_MAGIC); |
| mb->version = R5LOG_VERSION; |
| mb->meta_size = __cpu_to_le32(sizeof(struct r5l_meta_block)); |
| mb->seq = __cpu_to_le64(random32()); |
| mb->position = __cpu_to_le64(0); |
| |
| crc = crc32c_le(0xffffffff, sb->set_uuid, sizeof(sb->set_uuid)); |
| crc = crc32c_le(crc, (void *)mb, META_BLOCK_SIZE); |
| mb->checksum = crc; |
| |
| if (lseek64(fd, __le64_to_cpu(sb->data_offset) * 512, 0) < 0LL) { |
| pr_err("cannot seek to offset of the meta block\n"); |
| goto fail_to_write; |
| } |
| |
| if (awrite(&afd, mb, META_BLOCK_SIZE) != META_BLOCK_SIZE) { |
| pr_err("failed to store write the meta block \n"); |
| goto fail_to_write; |
| } |
| fsync(fd); |
| |
| free(mb); |
| return 0; |
| |
| fail_to_write: |
| free(mb); |
| return 1; |
| } |
| |
| static int write_init_super1(struct supertype *st) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| struct supertype *refst; |
| int rv = 0; |
| unsigned long long bm_space; |
| struct devinfo *di; |
| unsigned long long dsize, array_size; |
| unsigned long long sb_offset; |
| unsigned long long data_offset; |
| long bm_offset; |
| int raid0_need_layout = 0; |
| |
| for (di = st->info; di; di = di->next) { |
| if (di->disk.state & (1 << MD_DISK_JOURNAL)) |
| sb->feature_map |= __cpu_to_le32(MD_FEATURE_JOURNAL); |
| if (sb->level == 0 && sb->layout != 0) { |
| struct devinfo *di2 = st->info; |
| unsigned long long s1, s2; |
| s1 = di->dev_size; |
| if (di->data_offset != INVALID_SECTORS) |
| s1 -= di->data_offset; |
| s1 /= __le32_to_cpu(sb->chunksize); |
| s2 = di2->dev_size; |
| if (di2->data_offset != INVALID_SECTORS) |
| s2 -= di2->data_offset; |
| s2 /= __le32_to_cpu(sb->chunksize); |
| if (s1 != s2) |
| raid0_need_layout = 1; |
| } |
| } |
| |
| for (di = st->info; di; di = di->next) { |
| if (di->disk.state & (1 << MD_DISK_FAULTY)) |
| continue; |
| if (di->fd < 0) |
| continue; |
| |
| while (Kill(di->devname, NULL, 0, -1, 1) == 0) |
| ; |
| |
| sb->dev_number = __cpu_to_le32(di->disk.number); |
| if (di->disk.state & (1<<MD_DISK_WRITEMOSTLY)) |
| sb->devflags |= WriteMostly1; |
| else |
| sb->devflags &= ~WriteMostly1; |
| if (di->disk.state & (1<<MD_DISK_FAILFAST)) |
| sb->devflags |= FailFast1; |
| else |
| sb->devflags &= ~FailFast1; |
| |
| random_uuid(sb->device_uuid); |
| |
| if (!(di->disk.state & (1<<MD_DISK_JOURNAL))) |
| sb->events = 0; |
| |
| refst = dup_super(st); |
| if (load_super1(refst, di->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_super1(refst); |
| } |
| free(refst); |
| |
| if (!get_dev_size(di->fd, NULL, &dsize)) { |
| rv = 1; |
| goto error_out; |
| } |
| dsize >>= 9; |
| |
| if (dsize < 24) { |
| close(di->fd); |
| rv = 2; |
| goto error_out; |
| } |
| |
| /* |
| * 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. |
| * data_offset has already been set. |
| */ |
| array_size = __le64_to_cpu(sb->size); |
| |
| /* work out how much space we left for a bitmap */ |
| if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { |
| bitmap_super_t *bms = (bitmap_super_t *) |
| (((char *)sb) + MAX_SB_SIZE); |
| bm_space = calc_bitmap_size(bms, 4096) >> 9; |
| bm_offset = (long)__le32_to_cpu(sb->bitmap_offset); |
| } else if (md_feature_any_ppl_on(sb->feature_map)) { |
| bm_space = MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9; |
| if (st->minor_version == 0) |
| bm_offset = -bm_space - 8; |
| else |
| bm_offset = 8; |
| sb->ppl.offset = __cpu_to_le16(bm_offset); |
| sb->ppl.size = __cpu_to_le16(bm_space); |
| } else { |
| bm_space = choose_bm_space(array_size); |
| bm_offset = 8; |
| } |
| |
| data_offset = di->data_offset; |
| if (data_offset == INVALID_SECTORS) |
| data_offset = st->data_offset; |
| switch(st->minor_version) { |
| case 0: |
| /* Add 8 sectors for bad block log */ |
| bm_space += 8; |
| if (data_offset == INVALID_SECTORS) |
| data_offset = 0; |
| sb_offset = dsize; |
| sb_offset -= 8*2; |
| sb_offset &= ~(4*2-1); |
| sb->data_offset = __cpu_to_le64(data_offset); |
| sb->super_offset = __cpu_to_le64(sb_offset); |
| if (sb_offset < array_size + bm_space) |
| bm_space = sb_offset - array_size; |
| sb->data_size = __cpu_to_le64(sb_offset - bm_space); |
| if (bm_space >= 8) { |
| sb->bblog_size = __cpu_to_le16(8); |
| sb->bblog_offset = __cpu_to_le32((unsigned)-8); |
| } |
| break; |
| case 1: |
| case 2: |
| sb_offset = st->minor_version == 2 ? 8 : 0; |
| sb->super_offset = __cpu_to_le64(sb_offset); |
| if (data_offset == INVALID_SECTORS) |
| data_offset = sb_offset + 16; |
| |
| sb->data_offset = __cpu_to_le64(data_offset); |
| sb->data_size = __cpu_to_le64(dsize - data_offset); |
| if (data_offset >= sb_offset+bm_offset+bm_space+8) { |
| sb->bblog_size = __cpu_to_le16(8); |
| sb->bblog_offset = __cpu_to_le32(bm_offset + |
| bm_space); |
| } else if (data_offset >= sb_offset + 16) { |
| sb->bblog_size = __cpu_to_le16(8); |
| /* '8' sectors for the bblog, and 'sb_offset' |
| * because we want offset from superblock, not |
| * start of device. |
| */ |
| sb->bblog_offset = __cpu_to_le32(data_offset - |
| 8 - sb_offset); |
| } |
| break; |
| default: |
| pr_err("Failed to write invalid metadata format 1.%i to %s\n", |
| st->minor_version, di->devname); |
| rv = -EINVAL; |
| goto out; |
| } |
| /* |
| * Disable badblock log on clusters, or when |
| * explicitly requested |
| */ |
| if (st->nodes > 0 || conf_get_create_info()->bblist == 0) { |
| sb->bblog_size = 0; |
| sb->bblog_offset = 0; |
| } |
| |
| /* RAID0 needs a layout if devices aren't all the same size */ |
| if (raid0_need_layout) |
| sb->feature_map |= __cpu_to_le32(MD_FEATURE_RAID0_LAYOUT); |
| |
| sb->sb_csum = calc_sb_1_csum(sb); |
| rv = store_super1(st, di->fd); |
| |
| if (rv == 0 && (di->disk.state & (1 << MD_DISK_JOURNAL))) { |
| rv = write_empty_r5l_meta_block(st, di->fd); |
| if (rv) |
| goto error_out; |
| } |
| |
| if (rv == 0 && |
| (__le32_to_cpu(sb->feature_map) & |
| MD_FEATURE_BITMAP_OFFSET)) { |
| rv = st->ss->write_bitmap(st, di->fd, NodeNumUpdate); |
| } else if (rv == 0 && |
| md_feature_any_ppl_on(sb->feature_map)) { |
| struct mdinfo info; |
| |
| st->ss->getinfo_super(st, &info, NULL); |
| rv = st->ss->write_init_ppl(st, &info, di->fd); |
| } |
| |
| close(di->fd); |
| di->fd = -1; |
| if (rv) |
| goto error_out; |
| } |
| error_out: |
| if (rv) |
| pr_err("Failed to write metadata to %s\n", di->devname); |
| out: |
| return rv; |
| } |
| |
| static int compare_super1(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 |
| */ |
| 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) { |
| if (posix_memalign((void**)&first, 4096, SUPER1_SIZE) != 0) { |
| pr_err("could not allocate superblock\n"); |
| return 1; |
| } |
| memcpy(first, second, SUPER1_SIZE); |
| 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 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; |
| struct align_fd afd; |
| |
| free_super1(st); |
| |
| init_afd(&afd, fd); |
| |
| if (st->ss == NULL || st->minor_version == -1) { |
| int bestvers = -1; |
| struct supertype tst; |
| __u64 bestctime = 0; |
| /* guess... choose latest ctime */ |
| memset(&tst, 0, sizeof(tst)); |
| tst.ss = &super1; |
| 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 = MAX_DEVS; |
| 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) |
| pr_err("%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; |
| } |
| |
| if (lseek64(fd, sb_offset << 9, 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, SUPER1_SIZE) != 0) { |
| pr_err("could not allocate superblock\n"); |
| return 1; |
| } |
| |
| memset(super, 0, SUPER1_SIZE); |
| |
| if (aread(&afd, super, MAX_SB_SIZE) != MAX_SB_SIZE) { |
| if (devname) |
| pr_err("Cannot read superblock on %s\n", |
| devname); |
| free(super); |
| return 1; |
| } |
| |
| if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) { |
| if (devname) |
| pr_err("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) |
| pr_err("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) |
| pr_err("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)+MAX_SB_SIZE); |
| |
| misc = (struct misc_dev_info*) |
| (((char*)super)+MAX_SB_SIZE+BM_SUPER_SIZE); |
| misc->device_size = dsize; |
| if (st->data_offset == INVALID_SECTORS) |
| st->data_offset = __le64_to_cpu(super->data_offset); |
| |
| /* 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, 0); |
| if (aread(&afd, bsb, 512) != 512) |
| 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) |
| & ~MD_FEATURE_BITMAP_OFFSET); |
| return 0; |
| } |
| |
| static struct supertype *match_metadata_desc1(char *arg) |
| { |
| struct supertype *st = xcalloc(1, sizeof(*st)); |
| |
| st->container_devnm[0] = 0; |
| st->ss = &super1; |
| st->max_devs = MAX_DEVS; |
| st->sb = NULL; |
| st->data_offset = INVALID_SECTORS; |
| /* leading zeros can be safely ignored. --detail generates them. */ |
| while (*arg == '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 || |
| #ifndef DEFAULT_OLD_METADATA /* ifdef in super0.c */ |
| strcmp(arg, "default") == 0 || |
| #endif /* DEFAULT_OLD_METADATA */ |
| strcmp(arg, "1.02") == 0) { |
| st->minor_version = 2; |
| return st; |
| } |
| if (strcmp(arg, "1") == 0 || strcmp(arg, "default") == 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 long data_offset) |
| { |
| struct mdp_superblock_1 *super = st->sb; |
| int bmspace = 0; |
| int bbspace = 0; |
| if (devsize < 24) |
| return 0; |
| |
| 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)+MAX_SB_SIZE); |
| bmspace = calc_bitmap_size(bsb, 4096) >> 9; |
| } else if (md_feature_any_ppl_on(super->feature_map)) { |
| bmspace = __le16_to_cpu(super->ppl.size); |
| } |
| |
| /* Allow space for bad block log */ |
| if (super->bblog_size) |
| bbspace = __le16_to_cpu(super->bblog_size); |
| |
| if (st->minor_version < 0) |
| /* not specified, so time to set default */ |
| st->minor_version = 2; |
| |
| if (data_offset == INVALID_SECTORS) |
| data_offset = st->data_offset; |
| |
| if (data_offset != INVALID_SECTORS) |
| switch(st->minor_version) { |
| case 0: |
| return devsize - data_offset - 8*2 - bbspace; |
| case 1: |
| case 2: |
| return devsize - data_offset; |
| default: |
| return 0; |
| } |
| |
| devsize -= bmspace; |
| |
| switch(st->minor_version) { |
| case 0: |
| /* at end */ |
| return ((devsize - 8*2 - bbspace ) & ~(4*2-1)); |
| case 1: |
| /* at start, 4K for superblock and possible bitmap */ |
| return devsize - 4*2 - bbspace; |
| case 2: |
| /* 4k from start, 4K for superblock and possible bitmap */ |
| return devsize - (4+4)*2 - bbspace; |
| } |
| 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' without sysfs support for |
| * bitmaps, and the bitmap must fit after the superblock at 1K offset. |
| * If may_change, then this is create or a Grow with sysfs support, |
| * and we can put the bitmap wherever we like. |
| * |
| * size is in sectors, chunk is in bytes !!! |
| */ |
| |
| unsigned long long bits; |
| unsigned long long max_bits; |
| unsigned long long min_chunk; |
| long offset; |
| long bbl_offset, bbl_size; |
| unsigned long long chunk = *chunkp; |
| int room = 0; |
| int creating = 0; |
| int len; |
| struct mdp_superblock_1 *sb = st->sb; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb) + MAX_SB_SIZE); |
| int uuid[4]; |
| |
| if (__le64_to_cpu(sb->data_size) == 0) |
| /* |
| * Must be creating the array, else data_size |
| * would be non-zero |
| */ |
| creating = 1; |
| switch(st->minor_version) { |
| case 0: |
| /* |
| * either 3K after the superblock (when hot-add), |
| * or some amount of space before. |
| */ |
| if (creating) { |
| /* |
| * We are creating array, so we *know* how much room has |
| * been left. |
| */ |
| offset = 0; |
| bbl_size = 8; |
| room = |
| choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size; |
| } else { |
| room = __le64_to_cpu(sb->super_offset) |
| - __le64_to_cpu(sb->data_offset) |
| - __le64_to_cpu(sb->data_size); |
| bbl_size = __le16_to_cpu(sb->bblog_size); |
| if (bbl_size < 8) |
| bbl_size = 8; |
| bbl_offset = (__s32)__le32_to_cpu(sb->bblog_offset); |
| if (bbl_size < -bbl_offset) |
| bbl_size = -bbl_offset; |
| |
| if (!may_change || |
| (room < 3*2 && __le32_to_cpu(sb->max_dev) <= 384)) { |
| room = 3*2; |
| offset = 1*2; |
| bbl_size = 0; |
| } else { |
| offset = 0; /* means movable offset */ |
| } |
| } |
| break; |
| case 1: |
| case 2: /* between superblock and data */ |
| if (creating) { |
| offset = 4*2; |
| bbl_size = 8; |
| room = |
| choose_bm_space(__le64_to_cpu(sb->size)) + bbl_size; |
| } else { |
| room = __le64_to_cpu(sb->data_offset) |
| - __le64_to_cpu(sb->super_offset); |
| bbl_size = __le16_to_cpu(sb->bblog_size); |
| if (bbl_size) |
| room = |
| __le32_to_cpu(sb->bblog_offset) + bbl_size; |
| else |
| bbl_size = 8; |
| |
| if (!may_change) { |
| room -= 2; /* Leave 1K for superblock */ |
| offset = 2; |
| bbl_size = 0; |
| } else { |
| room -= 4*2; /* leave 4K for superblock */ |
| offset = 4*2; |
| } |
| } |
| break; |
| default: |
| return -ENOSPC; |
| } |
| |
| room -= bbl_size; |
| if (chunk == UnSet && room > 128*2) |
| /* Limit to 128K of bitmap when chunk size not requested */ |
| room = 128*2; |
| |
| if (room <= 1) |
| /* No room for a bitmap */ |
| return -ENOSPC; |
| |
| 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) { |
| /* For practical purpose, 64Meg is a good |
| * default chunk size for internal bitmaps. |
| */ |
| chunk = min_chunk; |
| if (chunk < 64*1024*1024) |
| chunk = 64*1024*1024; |
| } else if (chunk < min_chunk) |
| return -EINVAL; /* chunk size too small */ |
| if (chunk == 0) /* rounding problem */ |
| return -EINVAL; |
| |
| if (offset == 0) { |
| /* start bitmap on a 4K boundary with enough space for |
| * the bitmap |
| */ |
| bits = (size*512) / chunk + 1; |
| room = ((bits+7)/8 + sizeof(bitmap_super_t) +4095)/4096; |
| room *= 8; /* convert 4K blocks to sectors */ |
| offset = -room - bbl_size; |
| } |
| |
| sb->bitmap_offset = (int32_t)__cpu_to_le32(offset); |
| |
| sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | |
| MD_FEATURE_BITMAP_OFFSET); |
| memset(bms, 0, sizeof(*bms)); |
| bms->magic = __cpu_to_le32(BITMAP_MAGIC); |
| bms->version = __cpu_to_le32(major); |
| uuid_from_super1(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); |
| bms->nodes = __cpu_to_le32(st->nodes); |
| if (st->nodes) |
| sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map) | |
| MD_FEATURE_BITMAP_VERSIONED); |
| if (st->cluster_name) { |
| len = sizeof(bms->cluster_name); |
| strncpy((char *)bms->cluster_name, st->cluster_name, len); |
| bms->cluster_name[len - 1] = '\0'; |
| } |
| |
| *chunkp = chunk; |
| return 0; |
| } |
| |
| static int locate_bitmap1(struct supertype *st, int fd, int node_num) |
| { |
| unsigned long long offset, bm_sectors_per_node; |
| struct mdp_superblock_1 *sb; |
| bitmap_super_t *bms; |
| int mustfree = 0; |
| int ret; |
| |
| if (!st->sb) { |
| if (st->ss->load_super(st, fd, NULL)) |
| return -1; /* no error I hope... */ |
| mustfree = 1; |
| } |
| sb = st->sb; |
| |
| if ((__le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) |
| ret = 0; |
| else |
| ret = -1; |
| |
| offset = __le64_to_cpu(sb->super_offset) + __le32_to_cpu(sb->bitmap_offset); |
| if (node_num) { |
| bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE); |
| bm_sectors_per_node = calc_bitmap_size(bms, 4096) >> 9; |
| offset += bm_sectors_per_node * node_num; |
| } |
| if (mustfree) |
| free(sb); |
| lseek64(fd, offset<<9, 0); |
| return ret; |
| } |
| |
| static int write_bitmap1(struct supertype *st, int fd, enum bitmap_update update) |
| { |
| struct mdp_superblock_1 *sb = st->sb; |
| bitmap_super_t *bms = (bitmap_super_t*)(((char*)sb)+MAX_SB_SIZE); |
| int rv = 0; |
| void *buf; |
| int towrite, n, len; |
| struct align_fd afd; |
| unsigned int i = 0; |
| unsigned long long total_bm_space, bm_space_per_node; |
| |
| switch (update) { |
| case NameUpdate: |
| /* update cluster name */ |
| if (st->cluster_name) { |
| len = sizeof(bms->cluster_name); |
| memset((char *)bms->cluster_name, 0, len); |
| strncpy((char *)bms->cluster_name, |
| st->cluster_name, len); |
| bms->cluster_name[len - 1] = '\0'; |
| } |
| break; |
| case NodeNumUpdate: |
| /* cluster md only supports superblock 1.2 now */ |
| if (st->minor_version != 2 && |
| bms->version == BITMAP_MAJOR_CLUSTERED) { |
| pr_err("Warning: cluster md only works with superblock 1.2\n"); |
| return -EINVAL; |
| } |
| |
| if (bms->version == BITMAP_MAJOR_CLUSTERED) { |
| if (__cpu_to_le32(st->nodes) < bms->nodes) { |
| /* |
| * Since the nodes num is not increased, no |
| * need to check the space enough or not, |
| * just update bms->nodes |
| */ |
| bms->nodes = __cpu_to_le32(st->nodes); |
| break; |
| } |
| } else { |
| /* |
| * no need to change bms->nodes for other |
| * bitmap types |
| */ |
| if (st->nodes) |
| pr_err("Warning: --nodes option is only suitable for clustered bitmap\n"); |
| break; |
| } |
| |
| /* |
| * Each node has an independent bitmap, it is necessary to |
| * calculate the space is enough or not, first get how many |
| * bytes for the total bitmap |
| */ |
| bm_space_per_node = calc_bitmap_size(bms, 4096); |
| |
| total_bm_space = 512 * (__le64_to_cpu(sb->data_offset) - |
| __le64_to_cpu(sb->super_offset)); |
| /* leave another 4k for superblock */ |
| total_bm_space = total_bm_space - 4096; |
| |
| if (bm_space_per_node * st->nodes > total_bm_space) { |
| pr_err("Warning: The max num of nodes can't exceed %llu\n", |
| total_bm_space / bm_space_per_node); |
| return -ENOMEM; |
| } |
| |
| bms->nodes = __cpu_to_le32(st->nodes); |
| break; |
| case NoUpdate: |
| default: |
| break; |
| } |
| |
| init_afd(&afd, fd); |
| |
| if (locate_bitmap1(st, fd, 0) < 0) { |
| pr_err("Error: Invalid bitmap\n"); |
| return -EINVAL; |
| } |
| |
| if (posix_memalign(&buf, 4096, 4096)) |
| return -ENOMEM; |
| |
| do { |
| /* Only the bitmap[0] should resync |
| * whole device on initial assembly |
| */ |
| if (i) |
| memset(buf, 0x00, 4096); |
| else |
| memset(buf, 0xff, 4096); |
| memcpy(buf, (char *)bms, sizeof(bitmap_super_t)); |
| |
| /* |
| * use 4096 boundary if bitmap_offset is aligned |
| * with 8 sectors, then it should compatible with |
| * older mdadm. |
| */ |
| if (__le32_to_cpu(sb->bitmap_offset) & 7) |
| towrite = calc_bitmap_size(bms, 512); |
| else |
| towrite = calc_bitmap_size(bms, 4096); |
| while (towrite > 0) { |
| n = towrite; |
| if (n > 4096) |
| n = 4096; |
| n = awrite(&afd, buf, n); |
| if (n > 0) |
| towrite -= n; |
| else |
| break; |
| if (i) |
| memset(buf, 0x00, 4096); |
| else |
| memset(buf, 0xff, 4096); |
| } |
| fsync(fd); |
| if (towrite) { |
| rv = -2; |
| break; |
| } |
| } while (++i < __le32_to_cpu(bms->nodes)); |
| |
| free(buf); |
| return rv; |
| } |
| |
| static void free_super1(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_geometry1(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, devsize; |
| int bmspace; |
| unsigned long long headroom; |
| unsigned long long overhead; |
| int fd; |
| |
| if (level == LEVEL_CONTAINER) { |
| if (verbose) |
| pr_err("1.x metadata does not support containers\n"); |
| return 0; |
| } |
| if (*chunk == UnSet) |
| *chunk = DEFAULT_CHUNK; |
| |
| if (!subdev) |
| return 1; |
| |
| if (st->minor_version < 0) |
| /* not specified, so time to set default */ |
| st->minor_version = 2; |
| |
| fd = open(subdev, O_RDONLY|O_EXCL, 0); |
| if (fd < 0) { |
| if (verbose) |
| pr_err("super1.x cannot open %s: %s\n", |
| subdev, strerror(errno)); |
| return 0; |
| } |
| |
| if (!get_dev_size(fd, subdev, &ldsize)) { |
| close(fd); |
| return 0; |
| } |
| close(fd); |
| |
| devsize = ldsize >> 9; |
| |
| /* creating: allow suitable space for bitmap or PPL */ |
| if (consistency_policy == CONSISTENCY_POLICY_PPL) |
| bmspace = MULTIPLE_PPL_AREA_SIZE_SUPER1 >> 9; |
| else |
| bmspace = choose_bm_space(devsize); |
| |
| if (data_offset == INVALID_SECTORS) |
| data_offset = st->data_offset; |
| if (data_offset == INVALID_SECTORS) |
| switch (st->minor_version) { |
| case 0: |
| data_offset = 0; |
| break; |
| case 1: |
| case 2: |
| /* Choose data offset appropriate for this device |
| * and use as default for whole array. |
| * The data_offset must allow for bitmap space |
| * and base metadata, should allow for some headroom |
| * for reshape, and should be rounded to multiple |
| * of 1M. |
| * Headroom is limited to 128M, but aim for about 0.1% |
| */ |
| headroom = 128*1024*2; |
| while ((headroom << 10) > devsize && |
| (*chunk == 0 || |
| headroom / 2 >= ((unsigned)(*chunk)*2)*2)) |
| headroom >>= 1; |
| data_offset = 12*2 + bmspace + headroom; |
| #define ONE_MEG (2*1024) |
| data_offset = ROUND_UP(data_offset, ONE_MEG); |
| break; |
| } |
| if (st->data_offset == INVALID_SECTORS) |
| st->data_offset = data_offset; |
| switch(st->minor_version) { |
| case 0: /* metadata at end. Round down and subtract space to reserve */ |
| devsize = (devsize & ~(4ULL*2-1)); |
| /* space for metadata, bblog, bitmap/ppl */ |
| overhead = 8*2 + 8 + bmspace; |
| if (devsize < overhead) /* detect underflow */ |
| goto dev_too_small_err; |
| devsize -= overhead; |
| break; |
| case 1: |
| case 2: |
| if (devsize < data_offset) /* detect underflow */ |
| goto dev_too_small_err; |
| devsize -= data_offset; |
| break; |
| } |
| *freesize = devsize; |
| return 1; |
| |
| /* Error condition, device cannot even hold the overhead. */ |
| dev_too_small_err: |
| fprintf(stderr, "device %s is too small (%lluK) for " |
| "required metadata!\n", subdev, devsize>>1); |
| *freesize = 0; |
| return 0; |
| } |
| |
| void *super1_make_v0(struct supertype *st, struct mdinfo *info, mdp_super_t *sb0) |
| { |
| /* Create a v1.0 superblock based on 'info'*/ |
| void *ret; |
| struct mdp_superblock_1 *sb; |
| int i; |
| unsigned long long offset; |
| |
| if (posix_memalign(&ret, 4096, 1024) != 0) |
| return NULL; |
| sb = ret; |
| memset(ret, 0, 1024); |
| sb->magic = __cpu_to_le32(MD_SB_MAGIC); |
| sb->major_version = __cpu_to_le32(1); |
| |
| copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid); |
| sprintf(sb->set_name, "%d", sb0->md_minor); |
| sb->ctime = __cpu_to_le32(info->array.ctime+1); |
| sb->level = __cpu_to_le32(info->array.level); |
| sb->layout = __cpu_to_le32(info->array.layout); |
| sb->size = __cpu_to_le64(info->component_size); |
| sb->chunksize = __cpu_to_le32(info->array.chunk_size/512); |
| sb->raid_disks = __cpu_to_le32(info->array.raid_disks); |
| if (info->array.level > 0) |
| sb->data_size = sb->size; |
| else |
| sb->data_size = st->ss->avail_size(st, st->devsize/512, 0); |
| sb->resync_offset = MaxSector; |
| sb->max_dev = __cpu_to_le32(MD_SB_DISKS); |
| sb->dev_number = __cpu_to_le32(info->disk.number); |
| sb->utime = __cpu_to_le64(info->array.utime); |
| |
| offset = st->devsize/512 - 8*2; |
| offset &= ~(4*2-1); |
| sb->super_offset = __cpu_to_le64(offset); |
| //*(__u64*)(st->other + 128 + 8 + 8) = __cpu_to_le64(offset); |
| |
| random_uuid(sb->device_uuid); |
| |
| for (i = 0; i < MD_SB_DISKS; i++) { |
| int state = sb0->disks[i].state; |
| sb->dev_roles[i] = MD_DISK_ROLE_SPARE; |
| if ((state & (1<<MD_DISK_SYNC)) && |
| !(state & (1<<MD_DISK_FAULTY))) |
| sb->dev_roles[i] = __cpu_to_le16(sb0->disks[i].raid_disk); |
| } |
| sb->sb_csum = calc_sb_1_csum(sb); |
| return ret; |
| } |
| |
| struct superswitch super1 = { |
| .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, |
| .write_init_super = write_init_super1, |
| .validate_geometry = validate_geometry1, |
| .add_to_super = add_to_super1, |
| .examine_badblocks = examine_badblocks_super1, |
| .copy_metadata = copy_metadata1, |
| .write_init_ppl = write_init_ppl1, |
| .match_home = match_home1, |
| .uuid_from_super = uuid_from_super1, |
| .getinfo_super = getinfo_super1, |
| .container_content = container_content1, |
| .update_super = update_super1, |
| .init_super = init_super1, |
| .store_super = store_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, |
| #if __BYTE_ORDER == BIG_ENDIAN |
| .swapuuid = 0, |
| #else |
| .swapuuid = 1, |
| #endif |
| .name = "1.x", |
| }; |