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| author | Chandan Babu R <chandanbabu@kernel.org> | 2023-09-13 10:33:27 +0530 |
|---|---|---|
| committer | Chandan Babu R <chandanbabu@kernel.org> | 2023-09-13 10:33:27 +0530 |
| commit | 6ebb6500e54631b7013f4efe7d78ff562e437c5e (patch) | |
| tree | e1d485a3543ca19bd1e8f783954e8a70eb271edd /fs | |
| parent | abf7c8194f232c5b6ab7b4c56d9b2159e4ac46ab (diff) | |
| parent | 34389616a963480b20ea7f997533380ae3946fba (diff) | |
| download | linux-6ebb6500e54631b7013f4efe7d78ff562e437c5e.tar.gz | |
Merge tag 'fix-larp-requirements-6.6_2023-09-12' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.6-fixesA
xfs: disallow LARP on old fses
Before enabling logged xattrs, make sure the filesystem is new enough
that it actually supports log incompat features.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
* tag 'fix-larp-requirements-6.6_2023-09-12' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux:
xfs: require a relatively recent V5 filesystem for LARP mode
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_xattr.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c index 43e5c219aaed56..a3975f325f4ea8 100644 --- a/fs/xfs/xfs_xattr.c +++ b/fs/xfs/xfs_xattr.c @@ -46,6 +46,17 @@ xfs_attr_grab_log_assist( if (xfs_sb_version_haslogxattrs(&mp->m_sb)) return 0; + /* + * Check if the filesystem featureset is new enough to set this log + * incompat feature bit. Strictly speaking, the minimum requirement is + * a V5 filesystem for the superblock field, but we'll require rmap + * or reflink to avoid having to deal with really old kernels. + */ + if (!xfs_has_reflink(mp) && !xfs_has_rmapbt(mp)) { + error = -EOPNOTSUPP; + goto drop_incompat; + } + /* Enable log-assisted xattrs. */ error = xfs_add_incompat_log_feature(mp, XFS_SB_FEAT_INCOMPAT_LOG_XATTRS); |