diff options
| author | Brian Foster <bfoster@redhat.com> | 2018-07-12 08:26:22 +0300 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-07-12 08:26:22 +0300 |
| commit | 766139032f95bb41031f6de9c2ee0538bd035229 (patch) | |
| tree | dc21b2a2b9a56c8ea4dabc3362fccb065e857605 /fs/xfs/libxfs/xfs_dir2.c | |
| parent | 825d75cd8c1b53883dd8c2fe1d8833c371b08074 (diff) | |
| download | linux-766139032f95bb41031f6de9c2ee0538bd035229.tar.xz | |
xfs: use ->t_firstblock in xattr ops
Similar to the dirops code, the xattr code uses an on-stack
firstblock variable for the various operations. This code rolls the
underlying transaction in various places, however, which means we
cannot simply replace the local firstblock vars with ->t_firstblock.
Doing so (without further changes) would invalidate the memory
pointed to by xfs_da_args.firstblock as soon as the first
transaction rolls.
To avoid this problem, remove xfs_da_args.firstblock and replace all
such accesses with ->t_firstblock at the same time. This ensures
that accesses to the current firstblock always occur through the
current transaction rather than a potentially invalid xfs_da_args
pointer.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/libxfs/xfs_dir2.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_dir2.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/fs/xfs/libxfs/xfs_dir2.c b/fs/xfs/libxfs/xfs_dir2.c index a3983e3eb64a..5db73d96b99e 100644 --- a/fs/xfs/libxfs/xfs_dir2.c +++ b/fs/xfs/libxfs/xfs_dir2.c @@ -272,7 +272,6 @@ xfs_dir_createname( args->total = total; args->whichfork = XFS_DATA_FORK; args->trans = tp; - args->firstblock = &tp->t_firstblock; args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; if (!inum) args->op_flags |= XFS_DA_OP_JUSTCHECK; @@ -439,7 +438,6 @@ xfs_dir_removename( args->hashval = dp->i_mount->m_dirnameops->hashname(name); args->inumber = ino; args->dp = dp; - args->firstblock = &tp->t_firstblock; args->total = total; args->whichfork = XFS_DATA_FORK; args->trans = tp; @@ -502,7 +500,6 @@ xfs_dir_replace( args->hashval = dp->i_mount->m_dirnameops->hashname(name); args->inumber = inum; args->dp = dp; - args->firstblock = &tp->t_firstblock; args->total = total; args->whichfork = XFS_DATA_FORK; args->trans = tp; @@ -660,7 +657,7 @@ xfs_dir2_shrink_inode( /* Unmap the fsblock(s). */ error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, - args->firstblock, &done); + &tp->t_firstblock, &done); if (error) { /* * ENOSPC actually can happen if we're in a removename with no |