libfuse: implement readdirplus for high-level API

Reuse the old "readdir" callback, but add a flags argument, that has
FUSE_READDIR_PLUS in case this is a "plus" version.  Filesystems can safely
ignore this flag, but if they want they can add optimizations based on it:
i.e. only retrieve the full attributes in PLUS mode.

The filler function is also given a flags argument and the filesystem can
set FUSE_FILL_DIR_PLUS if all the attributes in "stat" are valid.

1 files changed, 6 insertions, 4 deletions

diff --git a/example/fioc.c b/example/fioc.c
index 2117ac8..368f807 100755
--- a/example/fioc.c
+++ b/example/fioc.c
@@ -169,17 +169,19 @@ static int fioc_truncate(const char *path, off_t size)
 }
 
 static int fioc_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
-			off_t offset, struct fuse_file_info *fi)
+			off_t offset, struct fuse_file_info *fi,
+			enum fuse_readdir_flags flags)
 {
 	(void) fi;
 	(void) offset;
+	(void) flags;
 
 	if (fioc_file_type(path) != FIOC_ROOT)
 		return -ENOENT;
 
-	filler(buf, ".", NULL, 0);
-	filler(buf, "..", NULL, 0);
-	filler(buf, FIOC_NAME, NULL, 0);
+	filler(buf, ".", NULL, 0, 0);
+	filler(buf, "..", NULL, 0, 0);
+	filler(buf, FIOC_NAME, NULL, 0, 0);
 
 	return 0;
 }