[XFS] use filldir internally

Currently xfs has a rather complicated internal scheme to allow for
different directory formats in IRIX. This patch rips all code related to
this out and pushes useage of the Linux filldir callback into the lowlevel
directory code. This does not make the code any less portable because
filldir can be used to create dirents of all possible variations
(including the IRIX ones as proved by the IRIX binary emulation code under
arch/mips/).

This patch get rid of an unessecary copy in the readdir path, about 400
lines of code and one of the last two users of the uio structure.

This version is updated to deal with dmapi aswell which greatly simplifies
the get_dirattrs code. The dmapi part has been tested using the
get_dirattrs tools from the xfstest dmapi suite1 with various small and
large directories.

SGI-PV: 968563
SGI-Modid: xfs-linux-melb:xfs-kern:29478a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/xfs/xfs_dir2_leaf.h b/fs/xfs/xfs_dir2_leaf.h
index 70c97f3f815e..6c9539f06987 100644
--- a/fs/xfs/xfs_dir2_leaf.h
+++ b/fs/xfs/xfs_dir2_leaf.h
@@ -232,9 +232,9 @@ extern void xfs_dir2_leaf_compact(struct xfs_da_args *args,
 extern void xfs_dir2_leaf_compact_x1(struct xfs_dabuf *bp, int *indexp,
                                      int *lowstalep, int *highstalep,
                                      int *lowlogp, int *highlogp);
-extern int xfs_dir2_leaf_getdents(struct xfs_trans *tp, struct xfs_inode *dp,
-                                  struct uio *uio, int *eofp,
-                                  struct xfs_dirent *dbp, xfs_dir2_put_t put);
+extern int xfs_dir2_leaf_getdents(struct xfs_inode *dp, void *dirent,
+                                  size_t bufsize, xfs_off_t *offset,
+                                  filldir_t filldir);
 extern int xfs_dir2_leaf_init(struct xfs_da_args *args, xfs_dir2_db_t bno,
                               struct xfs_dabuf **bpp, int magic);
 extern void xfs_dir2_leaf_log_ents(struct xfs_trans *tp, struct xfs_dabuf *bp,