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 <nbori...@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 ++++++++++++++++++++++++++++++++++++++---------
image/main.c | 25 +++++++++++++-------
volumes.c | 34 +++++++++++++++++++++------
volumes.h | 1 +
12 files changed, 146 insertions(+), 43 deletions(-)
diff --git a/btrfstune.c b/btrfstune.c
index 889b931c55d8..ea04159a81ce 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 bc2ee22f7943..0790264190f2 100644
--- a/check/main.c
+++ b/check/main.c
@@ -8418,7 +8418,7 @@ 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 06c8311bdfe3..10946b31976f 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -172,6 +172,7 @@ 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];
@@ -497,6 +498,7 @@ 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 6ddf4a46ce3c..77cbaf14f3c7 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 d8a6883aa85f..883c2ae1861d 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) &&
@@ -1458,7 +1458,7 @@ 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))
@@ -1474,7 +1474,7 @@ 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,
@@ -1595,7 +1595,7 @@ 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),
@@ -2157,7 +2157,7 @@ static noinline int split_leaf(struct btrfs_trans_handle
*trans,
}
}
}
-
+
if (split == 0)
btrfs_cpu_key_to_disk(&disk_key, ins_key);
else
@@ -2177,7 +2177,7 @@ 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 4719962df67d..c22d36b1871b 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
@@ -509,7 +511,8 @@ 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
@@ -1077,6 +1080,7 @@ 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 26e4f6e93ed6..c3be4a1017b7 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;
@@ -1169,6 +1184,12 @@ 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);
@@ -1289,6 +1310,7 @@ 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) {
@@ -1377,11 +1399,16 @@ 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);
error("dev_item UUID does not match fsid: %s != %s",
dev_fsid, fsid);
@@ -1448,6 +1475,7 @@ 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;
@@ -1455,6 +1483,7 @@ 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) {
@@ -1499,9 +1528,18 @@ 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
@@ -1602,7 +1640,7 @@ 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/image/main.c b/image/main.c
index 351c5a256938..efab3c44fb23 100644
--- a/image/main.c
+++ b/image/main.c
@@ -1401,7 +1401,7 @@ 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);
@@ -1593,9 +1593,12 @@ 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;
@@ -1722,7 +1725,7 @@ 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;
@@ -2036,9 +2039,13 @@ 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);
@@ -2314,7 +2321,7 @@ 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 d81b348eb14d..b8388194c38f 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;
@@ -712,7 +732,7 @@ 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;
@@ -1685,7 +1705,7 @@ 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)
@@ -1966,7 +1986,7 @@ 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);
@@ -2005,7 +2025,7 @@ 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 b4ea93f0bec3..f5732f6a4c0f 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;
--
2.7.4
