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SUSE:SLE-15-SP3:GA
btrfsprogs.17950
0001-btrfs-progs-Add-support-for-metadata_uuid-...
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File 0001-btrfs-progs-Add-support-for-metadata_uuid-field.patch of Package btrfsprogs.17950
From c4aadd9af2d153a03cda59977ed9a7d5700d9eae Mon Sep 17 00:00:00 2001 From: Nikolay Borisov <nborisov@suse.com> Date: Thu, 11 Oct 2018 18:03:59 +0300 Subject: [PATCH 1/6] btrfs-progs: Add support for metadata_uuid field Add support for a new metadata_uuid field. This is just a preparatory commit which switches all users of the fsid field for metdata comparison purposes to utilize the new field. This more or less mirrors the kernel patch, additionally: * Update 'btrfs inspect-internal dump-super' to account for the new field. This involes introducing the 'metadata_uuid' line to the output and updating the logic for comparing the fs uuid to the dev_item uuid. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> --- btrfstune.c | 3 ++ check/main.c | 2 +- chunk-recover.c | 16 +++++++++-- cmds-filesystem.c | 2 ++ cmds-inspect-dump-super.c | 22 ++++++++++++-- convert/common.c | 2 ++ ctree.c | 14 ++++----- ctree.h | 8 ++++-- disk-io.c | 60 ++++++++++++++++++++++++++++++++------- free-space-tree.c | 3 +- image/main.c | 25 ++++++++++------ volumes.c | 34 +++++++++++++++++----- volumes.h | 1 + 13 files changed, 148 insertions(+), 44 deletions(-) diff --git a/btrfstune.c b/btrfstune.c index 1e378ba1c2d7..ad70772b6962 100644 --- a/btrfstune.c +++ b/btrfstune.c @@ -248,6 +248,9 @@ static int change_fsid_prepare(struct btrfs_fs_info *fs_info) if (ret < 0) return ret; + /* Also need to change the metadatauuid of the fs info */ + memcpy(fs_info->metadata_uuid, fs_info->new_fsid, BTRFS_FSID_SIZE); + /* also restore new chunk_tree_id into tree_root for restore */ write_extent_buffer(tree_root->node, fs_info->new_chunk_tree_uuid, btrfs_header_chunk_tree_uuid(tree_root->node), diff --git a/check/main.c b/check/main.c index db18827b2843..915be1b5afd2 100644 --- a/check/main.c +++ b/check/main.c @@ -8424,7 +8424,7 @@ static int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans, btrfs_set_header_backref_rev(c, BTRFS_MIXED_BACKREF_REV); btrfs_set_header_owner(c, root->root_key.objectid); - write_extent_buffer(c, root->fs_info->fsid, + write_extent_buffer(c, root->fs_info->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE); write_extent_buffer(c, root->fs_info->chunk_tree_uuid, diff --git a/chunk-recover.c b/chunk-recover.c index 1d30db51d8ed..31325bfc54e0 100644 --- a/chunk-recover.c +++ b/chunk-recover.c @@ -759,7 +759,7 @@ static int scan_one_device(void *dev_scan_struct) rc->nodesize) break; - if (memcmp_extent_buffer(buf, rc->fs_devices->fsid, + if (memcmp_extent_buffer(buf, rc->fs_devices->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE)) { bytenr += rc->sectorsize; @@ -1155,7 +1155,7 @@ static int __rebuild_chunk_root(struct btrfs_trans_handle *trans, btrfs_set_header_level(cow, 0); btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV); btrfs_set_header_owner(cow, BTRFS_CHUNK_TREE_OBJECTID); - write_extent_buffer(cow, root->fs_info->fsid, + write_extent_buffer(cow, root->fs_info->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE); write_extent_buffer(cow, root->fs_info->chunk_tree_uuid, @@ -1192,7 +1192,8 @@ static int __rebuild_device_items(struct btrfs_trans_handle *trans, btrfs_set_stack_device_io_width(dev_item, dev->io_width); btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); - memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); + memcpy(dev_item->fsid, dev->fs_devices->metadata_uuid, + BTRFS_FSID_SIZE); ret = btrfs_insert_item(trans, root, &key, dev_item, sizeof(*dev_item)); @@ -1432,6 +1433,7 @@ open_ctree_with_broken_chunk(struct recover_control *rc) struct btrfs_fs_info *fs_info; struct btrfs_super_block *disk_super; struct extent_buffer *eb; + u64 features; int ret; fs_info = btrfs_new_fs_info(1, BTRFS_SUPER_INFO_OFFSET); @@ -1464,6 +1466,14 @@ open_ctree_with_broken_chunk(struct recover_control *rc) if (ret) goto out_devices; + features = btrfs_super_incompat_flags(disk_super); + + if (features & BTRFS_FEATURE_INCOMPAT_METADATA_UUID) + memcpy(fs_info->metadata_uuid, disk_super->metadata_uuid, + BTRFS_FSID_SIZE); + else + memcpy(fs_info->metadata_uuid, fs_info->fsid, BTRFS_FSID_SIZE); + btrfs_setup_root(fs_info->chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID); diff --git a/cmds-filesystem.c b/cmds-filesystem.c index d1af21eeca6b..b8beec13f0e5 100644 --- a/cmds-filesystem.c +++ b/cmds-filesystem.c @@ -173,6 +173,7 @@ static int match_search_item_kernel(u8 *fsid, char *mnt, char *label, return 0; } +/* Search for user visible uuid 'search' in registered filesystems */ static int uuid_search(struct btrfs_fs_devices *fs_devices, const char *search) { char uuidbuf[BTRFS_UUID_UNPARSED_SIZE]; @@ -498,6 +499,7 @@ static int copy_fs_devices(struct btrfs_fs_devices *dst, int ret = 0; memcpy(dst->fsid, src->fsid, BTRFS_FSID_SIZE); + memcpy(dst->metadata_uuid, src->metadata_uuid, BTRFS_FSID_SIZE); INIT_LIST_HEAD(&dst->devices); dst->seed = NULL; diff --git a/cmds-inspect-dump-super.c b/cmds-inspect-dump-super.c index e965267c5d96..97e9624db8d7 100644 --- a/cmds-inspect-dump-super.c +++ b/cmds-inspect-dump-super.c @@ -228,7 +228,8 @@ static struct readable_flag_entry incompat_flags_array[] = { DEF_INCOMPAT_FLAG_ENTRY(EXTENDED_IREF), DEF_INCOMPAT_FLAG_ENTRY(RAID56), DEF_INCOMPAT_FLAG_ENTRY(SKINNY_METADATA), - DEF_INCOMPAT_FLAG_ENTRY(NO_HOLES) + DEF_INCOMPAT_FLAG_ENTRY(NO_HOLES), + DEF_INCOMPAT_FLAG_ENTRY(METADATA_UUID) }; static const int incompat_flags_num = sizeof(incompat_flags_array) / sizeof(struct readable_flag_entry); @@ -319,6 +320,10 @@ static void dump_superblock(struct btrfs_super_block *sb, int full) u8 *p; u32 csum_size; u16 csum_type; + bool metadata_uuid_present = (btrfs_super_incompat_flags(sb) & + BTRFS_FEATURE_INCOMPAT_METADATA_UUID); + int cmp_res = 0; + csum_type = btrfs_super_csum_type(sb); csum_size = BTRFS_CSUM_SIZE; @@ -365,6 +370,12 @@ static void dump_superblock(struct btrfs_super_block *sb, int full) uuid_unparse(sb->fsid, buf); printf("fsid\t\t\t%s\n", buf); + if (metadata_uuid_present) { + uuid_unparse(sb->metadata_uuid, buf); + printf("metadata_uuid\t\t%s\n", buf); + } else { + printf("metadata_uuid\t\t%s\n", buf); + } printf("label\t\t\t"); s = sb->label; @@ -424,9 +435,14 @@ static void dump_superblock(struct btrfs_super_block *sb, int full) printf("dev_item.uuid\t\t%s\n", buf); uuid_unparse(sb->dev_item.fsid, buf); + if (metadata_uuid_present) { + cmp_res = !memcmp(sb->dev_item.fsid, sb->metadata_uuid, + BTRFS_FSID_SIZE); + } else { + cmp_res = !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE); + } printf("dev_item.fsid\t\t%s %s\n", buf, - !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) ? - "[match]" : "[DON'T MATCH]"); + cmp_res ? "[match]" : "[DON'T MATCH]"); printf("dev_item.type\t\t%llu\n", (unsigned long long) btrfs_stack_device_type(&sb->dev_item)); diff --git a/convert/common.c b/convert/common.c index a9b240431928..04b5901900c0 100644 --- a/convert/common.c +++ b/convert/common.c @@ -107,9 +107,11 @@ static int setup_temp_super(int fd, struct btrfs_mkfs_config *cfg, ret = -EINVAL; goto out; } + uuid_copy(super->metadata_uuid, super->fsid); } else { uuid_generate(super->fsid); uuid_unparse(super->fsid, cfg->fs_uuid); + uuid_copy(super->metadata_uuid, super->fsid); } uuid_generate(chunk_uuid); uuid_unparse(chunk_uuid, cfg->chunk_uuid); diff --git a/ctree.c b/ctree.c index 295cd5ed46b6..548d6e2c1f62 100644 --- a/ctree.c +++ b/ctree.c @@ -134,7 +134,7 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans, else btrfs_set_header_owner(cow, new_root_objectid); - write_extent_buffer(cow, root->fs_info->fsid, + write_extent_buffer(cow, root->fs_info->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE); WARN_ON(btrfs_header_generation(buf) > trans->transid); @@ -308,7 +308,7 @@ int __btrfs_cow_block(struct btrfs_trans_handle *trans, else btrfs_set_header_owner(cow, root->root_key.objectid); - write_extent_buffer(cow, root->fs_info->fsid, + write_extent_buffer(cow, root->fs_info->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE); WARN_ON(!(buf->flags & EXTENT_BAD_TRANSID) && @@ -1532,7 +1532,7 @@ static int noinline insert_new_root(struct btrfs_trans_handle *trans, btrfs_node_key(lower, &lower_key, 0); c = btrfs_alloc_free_block(trans, root, root->fs_info->nodesize, - root->root_key.objectid, &lower_key, + root->root_key.objectid, &lower_key, level, root->node->start, 0); if (IS_ERR(c)) @@ -1548,7 +1548,7 @@ static int noinline insert_new_root(struct btrfs_trans_handle *trans, root_add_used(root, root->fs_info->nodesize); - write_extent_buffer(c, root->fs_info->fsid, + write_extent_buffer(c, root->fs_info->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE); write_extent_buffer(c, root->fs_info->chunk_tree_uuid, @@ -1669,7 +1669,7 @@ static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root btrfs_set_header_generation(split, trans->transid); btrfs_set_header_backref_rev(split, BTRFS_MIXED_BACKREF_REV); btrfs_set_header_owner(split, root->root_key.objectid); - write_extent_buffer(split, root->fs_info->fsid, + write_extent_buffer(split, root->fs_info->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE); write_extent_buffer(split, root->fs_info->chunk_tree_uuid, btrfs_header_chunk_tree_uuid(split), @@ -2231,7 +2231,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans, } } } - + if (split == 0) btrfs_cpu_key_to_disk(&disk_key, ins_key); else @@ -2251,7 +2251,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans, btrfs_set_header_backref_rev(right, BTRFS_MIXED_BACKREF_REV); btrfs_set_header_owner(right, root->root_key.objectid); btrfs_set_header_level(right, 0); - write_extent_buffer(right, root->fs_info->fsid, + write_extent_buffer(right, root->fs_info->metadata_uuid, btrfs_header_fsid(), BTRFS_FSID_SIZE); write_extent_buffer(right, root->fs_info->chunk_tree_uuid, diff --git a/ctree.h b/ctree.h index f9c49d6041c1..45ef02e7fb45 100644 --- a/ctree.h +++ b/ctree.h @@ -454,8 +454,9 @@ struct btrfs_super_block { __le64 cache_generation; __le64 uuid_tree_generation; + u8 metadata_uuid[BTRFS_FSID_SIZE]; /* future expansion */ - __le64 reserved[30]; + __le64 reserved[28]; u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; } __attribute__ ((__packed__)); @@ -489,6 +490,7 @@ struct btrfs_super_block { #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7) #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8) #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9) +#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10) #define BTRFS_FEATURE_COMPAT_SUPP 0ULL @@ -511,7 +513,8 @@ struct btrfs_super_block { BTRFS_FEATURE_INCOMPAT_RAID56 | \ BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ - BTRFS_FEATURE_INCOMPAT_NO_HOLES) + BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ + BTRFS_FEATURE_INCOMPAT_METADATA_UUID) /* * A leaf is full of items. offset and size tell us where to find @@ -1090,6 +1093,7 @@ struct btrfs_device; struct btrfs_fs_devices; struct btrfs_fs_info { u8 fsid[BTRFS_FSID_SIZE]; + u8 metadata_uuid[BTRFS_FSID_SIZE]; u8 *new_fsid; u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; u8 *new_chunk_tree_uuid; diff --git a/disk-io.c b/disk-io.c index 5fafa144c0d3..1e5fac89b127 100644 --- a/disk-io.c +++ b/disk-io.c @@ -55,8 +55,9 @@ static int check_tree_block(struct btrfs_fs_info *fs_info, struct extent_buffer *buf) { - struct btrfs_fs_devices *fs_devices; + struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; u32 nodesize = fs_info->nodesize; + bool fsid_match = false; int ret = BTRFS_BAD_FSID; if (buf->start != btrfs_header_bytenr(buf)) @@ -72,12 +73,26 @@ static int check_tree_block(struct btrfs_fs_info *fs_info, btrfs_header_level(buf) != 0) return BTRFS_BAD_NRITEMS; - fs_devices = fs_info->fs_devices; while (fs_devices) { - if (fs_info->ignore_fsid_mismatch || - !memcmp_extent_buffer(buf, fs_devices->fsid, - btrfs_header_fsid(), - BTRFS_FSID_SIZE)) { + /* + * Checking the incompat flag is only valid for the current + * fs. For seed devices it's forbidden to have their uuid + * changed so reading ->fsid in this case is fine + */ + if (fs_devices == fs_info->fs_devices && + btrfs_fs_incompat(fs_info, METADATA_UUID)) + fsid_match = !memcmp_extent_buffer(buf, + fs_devices->metadata_uuid, + btrfs_header_fsid(), + BTRFS_FSID_SIZE); + else + fsid_match = !memcmp_extent_buffer(buf, + fs_devices->fsid, + btrfs_header_fsid(), + BTRFS_FSID_SIZE); + + + if (fs_info->ignore_fsid_mismatch || fsid_match) { ret = 0; break; } @@ -103,7 +118,7 @@ static void print_tree_block_error(struct btrfs_fs_info *fs_info, read_extent_buffer(eb, buf, btrfs_header_fsid(), BTRFS_UUID_SIZE); uuid_unparse(buf, found_uuid); - uuid_unparse(fs_info->fsid, fs_uuid); + uuid_unparse(fs_info->metadata_uuid, fs_uuid); fprintf(stderr, "fsid mismatch, want=%s, have=%s\n", fs_uuid, found_uuid); break; @@ -1170,6 +1185,12 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path, } memcpy(fs_info->fsid, &disk_super->fsid, BTRFS_FSID_SIZE); + if (btrfs_fs_incompat(fs_info, METADATA_UUID)) { + memcpy(fs_info->metadata_uuid, disk_super->metadata_uuid, + BTRFS_FSID_SIZE); + } else { + memcpy(fs_info->metadata_uuid, fs_info->fsid, BTRFS_FSID_SIZE); + } fs_info->sectorsize = btrfs_super_sectorsize(disk_super); fs_info->nodesize = btrfs_super_nodesize(disk_super); fs_info->stripesize = btrfs_super_stripesize(disk_super); @@ -1290,6 +1311,7 @@ static int check_super(struct btrfs_super_block *sb, unsigned sbflags) u32 crc; u16 csum_type; int csum_size; + u8 *metadata_uuid; if (btrfs_super_magic(sb) != BTRFS_MAGIC) { if (btrfs_super_magic(sb) == BTRFS_MAGIC_TEMPORARY) { @@ -1378,11 +1400,16 @@ static int check_super(struct btrfs_super_block *sb, unsigned sbflags) goto error_out; } - if (memcmp(sb->fsid, sb->dev_item.fsid, BTRFS_UUID_SIZE) != 0) { + if (btrfs_super_incompat_flags(sb) & BTRFS_FEATURE_INCOMPAT_METADATA_UUID) + metadata_uuid = sb->metadata_uuid; + else + metadata_uuid = sb->fsid; + + if (memcmp(metadata_uuid, sb->dev_item.fsid, BTRFS_FSID_SIZE) != 0) { char fsid[BTRFS_UUID_UNPARSED_SIZE]; char dev_fsid[BTRFS_UUID_UNPARSED_SIZE]; - uuid_unparse(sb->fsid, fsid); + uuid_unparse(sb->metadata_uuid, fsid); uuid_unparse(sb->dev_item.fsid, dev_fsid); if (sbflags & SBREAD_IGNORE_FSID_MISMATCH) { warning("ignored: dev_item fsid mismatch: %s != %s", @@ -1454,6 +1481,7 @@ int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr, unsigned sbflags) { u8 fsid[BTRFS_FSID_SIZE]; + u8 metadata_uuid[BTRFS_FSID_SIZE]; int fsid_is_initialized = 0; char tmp[BTRFS_SUPER_INFO_SIZE]; struct btrfs_super_block *buf = (struct btrfs_super_block *)tmp; @@ -1461,6 +1489,7 @@ int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr, int ret; int max_super = sbflags & SBREAD_RECOVER ? BTRFS_SUPER_MIRROR_MAX : 1; u64 transid = 0; + bool metadata_uuid_set = false; u64 bytenr; if (sb_bytenr != BTRFS_SUPER_INFO_OFFSET) { @@ -1505,9 +1534,18 @@ int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr, continue; if (!fsid_is_initialized) { + if (btrfs_super_incompat_flags(buf) & + BTRFS_FEATURE_INCOMPAT_METADATA_UUID) { + metadata_uuid_set = true; + memcpy(metadata_uuid, buf->metadata_uuid, + sizeof(metadata_uuid)); + } memcpy(fsid, buf->fsid, sizeof(fsid)); fsid_is_initialized = 1; - } else if (memcmp(fsid, buf->fsid, sizeof(fsid))) { + } else if (memcmp(fsid, buf->fsid, sizeof(fsid)) || + (metadata_uuid_set && memcmp(metadata_uuid, + buf->metadata_uuid, + sizeof(metadata_uuid)))) { /* * the superblocks (the original one and * its backups) contain data of different @@ -1608,7 +1646,7 @@ int write_all_supers(struct btrfs_fs_info *fs_info) btrfs_set_stack_device_io_width(dev_item, dev->io_width); btrfs_set_stack_device_sector_size(dev_item, dev->sector_size); memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE); - memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE); + memcpy(dev_item->fsid, fs_info->metadata_uuid, BTRFS_FSID_SIZE); flags = btrfs_super_flags(sb); btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN); diff --git a/free-space-tree.c b/free-space-tree.c index 6ef57928f1a9..0a3305415657 100644 --- a/free-space-tree.c +++ b/free-space-tree.c @@ -1453,7 +1453,8 @@ static struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); btrfs_set_header_owner(leaf, objectid); root->node = leaf; - write_extent_buffer(leaf, fs_info->fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); + write_extent_buffer(leaf, fs_info->metadata_uuid, btrfs_header_fsid(), + BTRFS_FSID_SIZE); write_extent_buffer(leaf, fs_info->chunk_tree_uuid, btrfs_header_chunk_tree_uuid(leaf), BTRFS_UUID_SIZE); diff --git a/image/main.c b/image/main.c index 343dea7833de..4654c31256d6 100644 --- a/image/main.c +++ b/image/main.c @@ -1404,7 +1404,7 @@ static void *restore_worker(void *data) list_del_init(&async->list); if (mdres->compress_method == COMPRESS_ZLIB) { - size = compress_size; + size = compress_size; pthread_mutex_unlock(&mdres->mutex); ret = uncompress(buffer, (unsigned long *)&size, async->buffer, async->bufsize); @@ -1596,9 +1596,12 @@ static int fill_mdres_info(struct mdrestore_struct *mdres, super = (struct btrfs_super_block *)outbuf; mdres->nodesize = btrfs_super_nodesize(super); - memcpy(mdres->fsid, super->fsid, BTRFS_FSID_SIZE); - memcpy(mdres->uuid, super->dev_item.uuid, - BTRFS_UUID_SIZE); + if (btrfs_super_incompat_flags(super) & + BTRFS_FEATURE_INCOMPAT_METADATA_UUID) + memcpy(mdres->fsid, super->metadata_uuid, BTRFS_FSID_SIZE); + else + memcpy(mdres->fsid, super->fsid, BTRFS_FSID_SIZE); + memcpy(mdres->uuid, super->dev_item.uuid, BTRFS_UUID_SIZE); mdres->devid = le64_to_cpu(super->dev_item.devid); free(buffer); return 0; @@ -1725,7 +1728,7 @@ static int read_chunk_block(struct mdrestore_struct *mdres, u8 *buffer, if (memcmp(mdres->fsid, eb->data + offsetof(struct btrfs_header, fsid), BTRFS_FSID_SIZE)) { - error("filesystem UUID of eb %llu does not match", + error("filesystem metadata UUID of eb %llu does not match", (unsigned long long)bytenr); ret = -EIO; goto out; @@ -2039,9 +2042,13 @@ static int build_chunk_tree(struct mdrestore_struct *mdres, super = (struct btrfs_super_block *)buffer; chunk_root_bytenr = btrfs_super_chunk_root(super); mdres->nodesize = btrfs_super_nodesize(super); - memcpy(mdres->fsid, super->fsid, BTRFS_FSID_SIZE); - memcpy(mdres->uuid, super->dev_item.uuid, - BTRFS_UUID_SIZE); + if (btrfs_super_incompat_flags(super) & + BTRFS_FEATURE_INCOMPAT_METADATA_UUID) + memcpy(mdres->fsid, super->metadata_uuid, BTRFS_FSID_SIZE); + else + memcpy(mdres->fsid, super->fsid, BTRFS_FSID_SIZE); + + memcpy(mdres->uuid, super->dev_item.uuid, BTRFS_UUID_SIZE); mdres->devid = le64_to_cpu(super->dev_item.devid); free(buffer); pthread_mutex_unlock(&mdres->mutex); @@ -2492,7 +2499,7 @@ static int update_disk_super_on_device(struct btrfs_fs_info *info, key.offset = cur_devid; btrfs_init_path(&path); - ret = btrfs_search_slot(NULL, info->chunk_root, &key, &path, 0, 0); + ret = btrfs_search_slot(NULL, info->chunk_root, &key, &path, 0, 0); if (ret) { error("search key failed: %d", ret); ret = -EIO; diff --git a/volumes.c b/volumes.c index 0dd082cd1718..6ef871637d7a 100644 --- a/volumes.c +++ b/volumes.c @@ -142,13 +142,19 @@ static struct btrfs_device *find_device(struct btrfs_fs_devices *fs_devices, return NULL; } -static struct btrfs_fs_devices *find_fsid(u8 *fsid) +static struct btrfs_fs_devices *find_fsid(u8 *fsid, u8 *metadata_uuid) { struct btrfs_fs_devices *fs_devices; list_for_each_entry(fs_devices, &fs_uuids, list) { - if (memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE) == 0) + if (metadata_uuid && (memcmp(fsid, fs_devices->fsid, + BTRFS_FSID_SIZE) == 0) && + (memcmp(metadata_uuid, fs_devices->metadata_uuid, + BTRFS_FSID_SIZE) == 0)) { return fs_devices; + } else if (memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE) == 0){ + return fs_devices; + } } return NULL; } @@ -160,8 +166,15 @@ static int device_list_add(const char *path, struct btrfs_device *device; struct btrfs_fs_devices *fs_devices; u64 found_transid = btrfs_super_generation(disk_super); + bool metadata_uuid = (btrfs_super_incompat_flags(disk_super) & + BTRFS_FEATURE_INCOMPAT_METADATA_UUID); + + if (metadata_uuid) + fs_devices = find_fsid(disk_super->fsid, + disk_super->metadata_uuid); + else + fs_devices = find_fsid(disk_super->fsid, NULL); - fs_devices = find_fsid(disk_super->fsid); if (!fs_devices) { fs_devices = kzalloc(sizeof(*fs_devices), GFP_NOFS); if (!fs_devices) @@ -169,6 +182,13 @@ static int device_list_add(const char *path, INIT_LIST_HEAD(&fs_devices->devices); list_add(&fs_devices->list, &fs_uuids); memcpy(fs_devices->fsid, disk_super->fsid, BTRFS_FSID_SIZE); + if (metadata_uuid) + memcpy(fs_devices->metadata_uuid, + disk_super->metadata_uuid, BTRFS_FSID_SIZE); + else + memcpy(fs_devices->metadata_uuid, fs_devices->fsid, + BTRFS_FSID_SIZE); + fs_devices->latest_devid = devid; fs_devices->latest_trans = found_transid; fs_devices->lowest_devid = (u64)-1; @@ -721,7 +741,7 @@ int btrfs_add_device(struct btrfs_trans_handle *trans, ptr = (unsigned long)btrfs_device_uuid(dev_item); write_extent_buffer(leaf, device->uuid, ptr, BTRFS_UUID_SIZE); ptr = (unsigned long)btrfs_device_fsid(dev_item); - write_extent_buffer(leaf, fs_info->fsid, ptr, BTRFS_UUID_SIZE); + write_extent_buffer(leaf, fs_info->metadata_uuid, ptr, BTRFS_UUID_SIZE); btrfs_mark_buffer_dirty(leaf); ret = 0; @@ -1698,7 +1718,7 @@ struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, cur_devices = fs_info->fs_devices; while (cur_devices) { if (!fsid || - (!memcmp(cur_devices->fsid, fsid, BTRFS_UUID_SIZE) || + (!memcmp(cur_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE) || fs_info->ignore_fsid_mismatch)) { device = find_device(cur_devices, devid, uuid); if (device) @@ -1980,7 +2000,7 @@ static int open_seed_devices(struct btrfs_fs_info *fs_info, u8 *fsid) fs_devices = fs_devices->seed; } - fs_devices = find_fsid(fsid); + fs_devices = find_fsid(fsid, NULL); if (!fs_devices) { /* missing all seed devices */ fs_devices = kzalloc(sizeof(*fs_devices), GFP_NOFS); @@ -2019,7 +2039,7 @@ static int read_one_dev(struct btrfs_fs_info *fs_info, BTRFS_UUID_SIZE); read_extent_buffer(leaf, fs_uuid, (unsigned long)btrfs_device_fsid(dev_item), - BTRFS_UUID_SIZE); + BTRFS_FSID_SIZE); if (memcmp(fs_uuid, fs_info->fsid, BTRFS_UUID_SIZE)) { ret = open_seed_devices(fs_info, fs_uuid); diff --git a/volumes.h b/volumes.h index 44284ee75adb..e30bcef7dba5 100644 --- a/volumes.h +++ b/volumes.h @@ -71,6 +71,7 @@ struct btrfs_device { struct btrfs_fs_devices { u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ + u8 metadata_uuid[BTRFS_FSID_SIZE]; /* FS specific uuid */ /* the device with this id has the most recent copy of the super */ u64 latest_devid; -- 2.17.1
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