libceph: support for sending notifies

Implement ceph_osdc_notify() for sending notifies.

Due to the fact that the current messenger can't do read-in into
pagelists (it can only do write-out from them), I had to go with a page
vector for a NOTIFY_COMPLETE payload, for now.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/ceph/rados.h b/include/linux/ceph/rados.h
index 204c8c944703..5c0da61cb763 100644
--- a/include/linux/ceph/rados.h
+++ b/include/linux/ceph/rados.h
@@ -477,6 +477,9 @@ struct ceph_osd_op {
 			__le32 gen;     /* registration generation */
 		} __attribute__ ((packed)) watch;
 		struct {
+			__le64 cookie;
+		} __attribute__ ((packed)) notify;
+		struct {
 			__le64 offset, length;
 			__le64 src_offset;
 		} __attribute__ ((packed)) clonerange;