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| author | Anand Jain <anand.jain@oracle.com> | 2023-05-24 15:02:42 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-06-19 14:59:29 +0300 |
| commit | 25984a5ae8f144e823468d39e483face534e45d1 (patch) | |
| tree | b18a29aba09d40bdc6437d9b994a18c81ba34079 /fs/btrfs/disk-io.c | |
| parent | a3c54b0be1a218bdd8e42abf9ecfd9bddf1eadee (diff) | |
| download | linux-25984a5ae8f144e823468d39e483face534e45d1.tar.xz | |
btrfs: consolidate uuid comparisons in btrfs_validate_super
There are three ways the fsid is validated in btrfs_validate_super():
- verify that super_copy::fsid is the same as fs_devices::fsid
- if the metadata_uuid flag is set, verify if super_copy::metadata_uuid
and fs_devices::metadata_uuid are the same.
- a few lines below, often missed out, verify if dev_item::fsid is the
same as fs_devices::metadata_uuid.
The function btrfs_validate_super() contains multiple if-statements with
memcmp() to check UUIDs. This patch consolidates them into a single
location.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 8102d2aa3f62..6e0d4f99ab04 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2399,6 +2399,14 @@ int btrfs_validate_super(struct btrfs_fs_info *fs_info, ret = -EINVAL; } + if (memcmp(fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid, + BTRFS_FSID_SIZE) != 0) { + btrfs_err(fs_info, + "dev_item UUID does not match metadata fsid: %pU != %pU", + fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid); + ret = -EINVAL; + } + /* * Artificial requirement for block-group-tree to force newer features * (free-space-tree, no-holes) so the test matrix is smaller. @@ -2411,14 +2419,6 @@ int btrfs_validate_super(struct btrfs_fs_info *fs_info, ret = -EINVAL; } - if (memcmp(fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid, - BTRFS_FSID_SIZE) != 0) { - btrfs_err(fs_info, - "dev_item UUID does not match metadata fsid: %pU != %pU", - fs_info->fs_devices->metadata_uuid, sb->dev_item.fsid); - ret = -EINVAL; - } - /* * Hint to catch really bogus numbers, bitflips or so, more exact checks are * done later |