ceph: define 'end/complete' in readdir reply as bit flags

Set a flag in readdir request, which indicates that client interprets
'end/complete' as bit flags. So that mds can reply additional flags in
readdir reply.

Signed-off-by: Yan, Zheng <zyan@redhat.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/ceph/ceph_fs.h b/include/linux/ceph/ceph_fs.h
index bae833d0d055..a811c5e98bfa 100644
--- a/include/linux/ceph/ceph_fs.h
+++ b/include/linux/ceph/ceph_fs.h
@@ -347,6 +347,17 @@ extern const char *ceph_mds_op_name(int op);
 #define CEPH_XATTR_REPLACE (1 << 1)
 #define CEPH_XATTR_REMOVE  (1 << 31)
 
+/*
+ * readdir request flags;
+ */
+#define CEPH_READDIR_REPLY_BITFLAGS     (1<<0)
+
+/*
+ * readdir reply flags.
+ */
+#define CEPH_READDIR_FRAG_END           (1<<0)
+#define CEPH_READDIR_FRAG_COMPLETE      (1<<8)
+
 union ceph_mds_request_args {
         struct {
                 __le32 mask;                 /* CEPH_CAP_* */
@@ -364,6 +375,7 @@ union ceph_mds_request_args {
                 __le32 frag;                 /* which dir fragment */
                 __le32 max_entries;          /* how many dentries to grab */
                 __le32 max_bytes;
+                __le16 flags;
         } __attribute__ ((packed)) readdir;
         struct {
                 __le32 mode;