xfs: actually report xattr extents via iomap

Apparently FIEMAP for xattrs has been broken since we switched to
the iomap backend because of an incorrect check for xattr presence.
Also fix the broken locking.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 009f824..b2f0901 100644 (file)
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -1170,10 +1170,10 @@ xfs_xattr_iomap_begin(
        if (XFS_FORCED_SHUTDOWN(mp))
                return -EIO;
 
-       lockmode = xfs_ilock_data_map_shared(ip);
+       lockmode = xfs_ilock_attr_map_shared(ip);
 
        /* if there are no attribute fork or extents, return ENOENT */
-       if (XFS_IFORK_Q(ip) || !ip->i_d.di_anextents) {
+       if (!XFS_IFORK_Q(ip) || !ip->i_d.di_anextents) {
                error = -ENOENT;
                goto out_unlock;
        }