diff options
| author | Brian Foster <bfoster@redhat.com> | 2018-07-11 22:26:22 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-07-11 22:26:22 -0700 |
| commit | 766139032f95bb41031f6de9c2ee0538bd035229 (patch) | |
| tree | dc21b2a2b9a56c8ea4dabc3362fccb065e857605 /fs/xfs/libxfs/xfs_da_btree.h | |
| parent | 825d75cd8c1b53883dd8c2fe1d8833c371b08074 (diff) | |
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_da_btree.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_da_btree.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_da_btree.h b/fs/xfs/libxfs/xfs_da_btree.h index 6b8a04f3f162..59e290ef334f 100644 --- a/fs/xfs/libxfs/xfs_da_btree.h +++ b/fs/xfs/libxfs/xfs_da_btree.h @@ -57,7 +57,6 @@ typedef struct xfs_da_args { xfs_dahash_t hashval; /* hash value of name */ xfs_ino_t inumber; /* input/output inode number */ struct xfs_inode *dp; /* directory inode to manipulate */ - xfs_fsblock_t *firstblock; /* ptr to firstblock for bmap calls */ struct xfs_trans *trans; /* current trans (changes over time) */ xfs_extlen_t total; /* total blocks needed, for 1st bmap */ int whichfork; /* data or attribute fork */ |