diff options
| author |   Brian Foster <bfoster@redhat.com> | 2017-10-17 14:16:28 -0700 |
|---|---|---|
| committer |   Darrick J. Wong <darrick.wong@oracle.com> | 2017-10-26 15:38:22 -0700 |
| commit | a53efbd5c6802e07b64aa767bb932da6913470c8 (patch) | |
| tree | 921df8467f362c0722b0113eb8adbb857853b961 /fs/xfs/xfs_attr_inactive.c | |
| parent | xfs: check kthread_should_stop() after the setting of task state (diff) | |
| download | linux-dev-a53efbd5c6802e07b64aa767bb932da6913470c8.tar.xz linux-dev-a53efbd5c6802e07b64aa767bb932da6913470c8.zip | |
xfs: fail if xattr inactivation hits a hole
The child buffer read in xfs_attr3_node_inactive() should never
reach a hole in the attr fork. If this occurs, it is likely due to a
bug. Prior to commit cd87d867 ("xfs: don't crash on unexpected holes
in dir/attr btrees"), this would result in a crash. Now that the
crash has been fixed, this is a silent failure.
Pass -1 to xfs_da3_node_read() from xfs_da3_node_inactive() to
indicate that reading from a hole is an error. This logs an error to
syslog and fails the inode inactivation, leaving the inode on the AG
unlinked list until removed by xfs_repair (or log recovery). Also
update the subsequent code to reflect that the read now returns a
non-NULL buffer or an error.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_attr_inactive.c')
| -rw-r--r-- | fs/xfs/xfs_attr_inactive.c | 69 |
1 files changed, 33 insertions, 36 deletions
diff --git a/fs/xfs/xfs_attr_inactive.c b/fs/xfs/xfs_attr_inactive.c index e3a950ed35a8..52818ea2eb50 100644 --- a/fs/xfs/xfs_attr_inactive.c +++ b/fs/xfs/xfs_attr_inactive.c @@ -251,47 +251,44 @@ xfs_attr3_node_inactive( * traversal of the tree so we may deal with many blocks * before we come back to this one. */ - error = xfs_da3_node_read(*trans, dp, child_fsb, -2, &child_bp, - XFS_ATTR_FORK); + error = xfs_da3_node_read(*trans, dp, child_fsb, -1, &child_bp, + XFS_ATTR_FORK); if (error) return error; - if (child_bp) { - /* save for re-read later */ - child_blkno = XFS_BUF_ADDR(child_bp); - /* - * Invalidate the subtree, however we have to. - */ - info = child_bp->b_addr; - switch (info->magic) { - case cpu_to_be16(XFS_DA_NODE_MAGIC): - case cpu_to_be16(XFS_DA3_NODE_MAGIC): - error = xfs_attr3_node_inactive(trans, dp, - child_bp, level + 1); - break; - case cpu_to_be16(XFS_ATTR_LEAF_MAGIC): - case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC): - error = xfs_attr3_leaf_inactive(trans, dp, - child_bp); - break; - default: - error = -EIO; - xfs_trans_brelse(*trans, child_bp); - break; - } - if (error) - return error; + /* save for re-read later */ + child_blkno = XFS_BUF_ADDR(child_bp); - /* - * Remove the subsidiary block from the cache - * and from the log. - */ - error = xfs_da_get_buf(*trans, dp, 0, child_blkno, - &child_bp, XFS_ATTR_FORK); - if (error) - return error; - xfs_trans_binval(*trans, child_bp); + /* + * Invalidate the subtree, however we have to. + */ + info = child_bp->b_addr; + switch (info->magic) { + case cpu_to_be16(XFS_DA_NODE_MAGIC): + case cpu_to_be16(XFS_DA3_NODE_MAGIC): + error = xfs_attr3_node_inactive(trans, dp, child_bp, + level + 1); + break; + case cpu_to_be16(XFS_ATTR_LEAF_MAGIC): + case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC): + error = xfs_attr3_leaf_inactive(trans, dp, child_bp); + break; + default: + error = -EIO; + xfs_trans_brelse(*trans, child_bp); + break; } + if (error) + return error; + + /* + * Remove the subsidiary block from the cache and from the log. + */ + error = xfs_da_get_buf(*trans, dp, 0, child_blkno, &child_bp, + XFS_ATTR_FORK); + if (error) + return error; + xfs_trans_binval(*trans, child_bp); /* * If we're not done, re-read the parent to get the next |