GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-03-18 05:04:04 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

xfs: disallow LARP on old fses

Browse source 
Before enabling logged xattrs, make sure the filesystem is new enough
 that it actually supports log incompat features.
 
 This has been lightly tested with fstests.  Enjoy!
 
 Signed-off-by: Darrick J. Wong <djwong@kernel.org>
 -----BEGIN PGP SIGNATURE-----
 
 iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZQChOQAKCRBKO3ySh0YR
 pqc1AQD8hXUpatOY50TdRDI6qpKBWOEti7r+sXyq9bWM4QZFyAD/Zjx3aZ+R2u2g
 lsb1xLjekrh2DzToOFnvs4gd/nZd7Qw=
 =BxHQ
 -----END PGP SIGNATURE-----

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
This commit is contained in:
Chandan Babu R 2023-09-13 10:33:27 +05:30
commit 6ebb6500e5
1 changed files with 11 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
fs/xfs/xfs_xattr.c
View file

@ -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);