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Diffstat (limited to '')
| -rw-r--r-- | super1.c | 3026 |
1 files changed, 3026 insertions, 0 deletions
diff --git a/super1.c b/super1.c new file mode 100644 index 0000000..871d19f --- /dev/null +++ b/super1.c @@ -0,0 +1,3026 @@ +/* + * 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, ", + info.space_before); + if (info.space_after < INT64_MAX) + printf("after=%llu sectors\n", info.space_after); + else + printf("after=-%llu sectors DEVICE TOO SMALL\n", + UINT64_MAX - info.space_after); + } + printf(" State : %s%s\n", + (__le64_to_cpu(sb->resync_offset) + 1) ? "active":"clean", + (info.space_after > INT64_MAX) ? " TRUNCATED DEVICE" : ""); + 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"); + 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_DIR "%s", 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]); + } + 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_s(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; + + 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, + enum update_opt 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 (update == UOPT_HOMEHOST && homehost) { + /* + * Note that 'homehost' is special as it is really + * a "name" update. + */ + char *c; + update = UOPT_NAME; + c = strchr(sb->set_name, ':'); + if (c) + snprintf(info->name, sizeof(info->name), "%s", c + 1); + else + snprintf(info->name, sizeof(info->name), "%s", + sb->set_name); + } + + switch (update) { + case UOPT_NAME: { + int namelen; + + if (!info->name[0]) + snprintf(info->name, sizeof(info->name), "%d", info->array.md_minor); + memset(sb->set_name, 0, sizeof(sb->set_name)); + + namelen = strnlen(homehost, MD_NAME_MAX) + 1 + strnlen(info->name, MD_NAME_MAX); + if (homehost && + strchr(info->name, ':') == NULL && + namelen < MD_NAME_MAX) { + strcpy(sb->set_name, homehost); + strcat(sb->set_name, ":"); + strcat(sb->set_name, info->name); + } else { + namelen = min((int)strnlen(info->name, MD_NAME_MAX), + (int)sizeof(sb->set_name) - 1); + memcpy(sb->set_name, info->name, namelen); + memset(&sb->set_name[namelen], '\0', + sizeof(sb->set_name) - namelen); + } + break; + } + case UOPT_SPEC_FORCE_ONE: + /* 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); + break; + case UOPT_SPEC_FORCE_ARRAY: + /* 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; + } + break; + case UOPT_SPEC_ASSEMBLE: { + 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; + } + break; + } + case UOPT_SPEC_LINEAR_GROW_NEW: { + 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)); + } + } + break; + } + case UOPT_SPEC_LINEAR_GROW_UPDATE: { + 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); + break; + } + case UOPT_RESYNC: + /* make sure resync happens */ + sb->resync_offset = 0; + break; + case UOPT_UUID: + 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); + break; + case UOPT_NO_BITMAP: + sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_BITMAP_OFFSET); + if (bms->version == BITMAP_MAJOR_CLUSTERED && !IsBitmapDirty(devname)) + sb->resync_offset = MaxSector; + break; + case UOPT_BBL: { + /* 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) + 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 { + 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); + } + } + break; + } + case UOPT_NO_BBL: + 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; + } + break; + case UOPT_FORCE_NO_BBL: + sb->feature_map &= ~ __cpu_to_le32(MD_FEATURE_BAD_BLOCKS); + sb->bblog_size = 0; + sb->bblog_shift = 0; + sb->bblog_offset = 0; + break; + case UOPT_PPL: { + 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); + break; + } + case UOPT_NO_PPL: + sb->feature_map &= ~__cpu_to_le32(MD_FEATURE_PPL | + MD_FEATURE_MUTLIPLE_PPLS); + break; + case UOPT_DEVICESIZE: + if (__le64_to_cpu(sb->super_offset) >= + __le64_to_cpu(sb->data_offset)) + break; + /* + * 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)); + break; + case UOPT_SPEC_REVERT_RESHAPE_NOBACKUP: + case UOPT_REVERT_RESHAPE: + 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 (update == UOPT_SPEC_REVERT_RESHAPE_NOBACKUP && + 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 (is_level456(__le32_to_cpu(sb->level))) { + 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:; + } + break; + case UOPT_SPEC__RESHAPE_PROGRESS: + sb->reshape_position = __cpu_to_le64(info->reshape_progress); + break; + case UOPT_SPEC_WRITEMOSTLY: + sb->devflags |= WriteMostly1; + break; + case UOPT_SPEC_READWRITE: + sb->devflags &= ~WriteMostly1; + break; + case UOPT_SPEC_FAILFAST: + sb->devflags |= FailFast1; + break; + case UOPT_SPEC_NOFAILFAST: + sb->devflags &= ~FailFast1; + break; + case UOPT_LAYOUT_ORIGINAL: + case UOPT_LAYOUT_ALTERNATE: + case UOPT_LAYOUT_UNSPECIFIED: + if (__le32_to_cpu(sb->level) != 0) { + pr_err("%s: %s only supported for RAID0\n", + devname ?: "", map_num(update_options, update)); + rv = -1; + } else if (update == UOPT_LAYOUT_UNSPECIFIED) { + 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 == UOPT_LAYOUT_ORIGINAL ? 1 : 2); + } + break; + default: + 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; + 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 bool has_raid0_layout(struct mdp_superblock_1 *sb) +{ + if (sb->level == 0 && sb->layout != 0) + return true; + else + return false; +} + +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; + bool raid0_need_layout = false; + + /* Since linux kernel v5.4, raid0 always has a layout */ + if (has_raid0_layout(sb) && get_linux_version() >= 5004000) + raid0_need_layout = true; + + 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 (has_raid0_layout(sb) && !raid0_need_layout) { + + 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 = true; + } + } + + 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; + } + 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++) { + tst.ignore_hw_compat = st->ignore_hw_compat; + 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; + } + + 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); + + if (st->minor_version >= 1 && + st->ignore_hw_compat == 0 && + ((role_from_sb(super) != MD_DISK_ROLE_JOURNAL && + dsize < (__le64_to_cpu(super->data_offset) + + __le64_to_cpu(super->size))) || + dsize < (__le64_to_cpu(super->data_offset) + + __le64_to_cpu(super->data_size)))) { + if (devname) + pr_err("Device %s is not large enough for data described in superblock\n", + devname); + free(super); + return 2; + } + st->sb = super; + + /* 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) + (int32_t)__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 (st->nodes == 1) { + /* the parameter for nodes is not valid */ + pr_err("Warning: cluster-md at least needs two nodes\n"); + return -EINVAL; + } else if (st->nodes == 0) { + /* + * parameter "--nodes" is not specified, (eg, add a disk to + * clustered raid) + */ + break; + } else 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 (is_container(level)) { + 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", +}; |