diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2017-06-16 11:00:14 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-06-20 10:45:22 -0700 |
| commit | ad017f6537dee30a67b89f937a16e2f6c82e3774 (patch) | |
| tree | 505ed25781dab9fd0720c692f52788453d9f4cc6 /fs/xfs/libxfs | |
| parent | acb9553cab552cf17154814f079f54401eefa474 (diff) | |
xfs: pass along transaction context when reading xattr block buffers
Teach the extended attribute reading functions to pass along a
transaction context if one was supplied. The extended attribute scrub
code will use transactions to lock buffers and avoid deadlocking with
itself in the case of loops; since it will already have the inode
locked, also create xattr get/list helpers that don't take locks.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_attr.c | 26 | ||||
| -rw-r--r-- | fs/xfs/libxfs/xfs_attr_remote.c | 5 |
2 files changed, 21 insertions, 10 deletions
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c index 6622d46ddec3..ef8a1c75a467 100644 --- a/fs/xfs/libxfs/xfs_attr.c +++ b/fs/xfs/libxfs/xfs_attr.c @@ -114,6 +114,23 @@ xfs_inode_hasattr( * Overall external interface routines. *========================================================================*/ +/* Retrieve an extended attribute and its value. Must have iolock. */ +int +xfs_attr_get_ilocked( + struct xfs_inode *ip, + struct xfs_da_args *args) +{ + if (!xfs_inode_hasattr(ip)) + return -ENOATTR; + else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) + return xfs_attr_shortform_getvalue(args); + else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) + return xfs_attr_leaf_get(args); + else + return xfs_attr_node_get(args); +} + +/* Retrieve an extended attribute by name, and its value. */ int xfs_attr_get( struct xfs_inode *ip, @@ -141,14 +158,7 @@ xfs_attr_get( args.op_flags = XFS_DA_OP_OKNOENT; lock_mode = xfs_ilock_attr_map_shared(ip); - if (!xfs_inode_hasattr(ip)) - error = -ENOATTR; - else if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) - error = xfs_attr_shortform_getvalue(&args); - else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) - error = xfs_attr_leaf_get(&args); - else - error = xfs_attr_node_get(&args); + error = xfs_attr_get_ilocked(ip, &args); xfs_iunlock(ip, lock_mode); *valuelenp = args.valuelen; diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c index da72b16bef8e..5236d8e45146 100644 --- a/fs/xfs/libxfs/xfs_attr_remote.c +++ b/fs/xfs/libxfs/xfs_attr_remote.c @@ -386,7 +386,8 @@ xfs_attr_rmtval_get( (map[i].br_startblock != HOLESTARTBLOCK)); dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock); dblkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount); - error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, + error = xfs_trans_read_buf(mp, args->trans, + mp->m_ddev_targp, dblkno, dblkcnt, 0, &bp, &xfs_attr3_rmt_buf_ops); if (error) @@ -395,7 +396,7 @@ xfs_attr_rmtval_get( error = xfs_attr_rmtval_copyout(mp, bp, args->dp->i_ino, &offset, &valuelen, &dst); - xfs_buf_relse(bp); + xfs_trans_brelse(args->trans, bp); if (error) return error; |