ceph-rbd: osdc support for osd call and rollback operations

This will be used for rbd snapshots administration.

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>

3 files changed, 29 insertions, 0 deletions

diff --git a/fs/ceph/decode.h b/fs/ceph/decode.h
index 3d25415afe63..c5b6939fb32a 100644
--- a/fs/ceph/decode.h
+++ b/fs/ceph/decode.h
@@ -191,6 +191,11 @@ static inline void ceph_encode_string(void **p, void *end,
                 ceph_encode_need(p, end, n, bad);               \
                 ceph_encode_copy(p, pv, n);                     \
         } while (0)
+#define ceph_encode_string_safe(p, end, s, n, bad)              \
+        do {                                                    \
+                ceph_encode_need(p, end, n, bad);               \
+                ceph_encode_string(p, end, s, n);               \
+        } while (0)
 
 
 #endif
diff --git a/fs/ceph/osd_client.c b/fs/ceph/osd_client.c
index c5d818e73add..0edb43f1ef26 100644
--- a/fs/ceph/osd_client.c
+++ b/fs/ceph/osd_client.c
@@ -161,6 +161,7 @@ static int op_needs_trail(int op)
         case CEPH_OSD_OP_GETXATTR:
         case CEPH_OSD_OP_SETXATTR:
         case CEPH_OSD_OP_CMPXATTR:
+        case CEPH_OSD_OP_CALL:
                 return 1;
         default:
                 return 0;
@@ -301,6 +302,23 @@ static void osd_req_encode_op(struct ceph_osd_request *req,
                 ceph_pagelist_append(req->r_trail, src->xattr.val,
                                      src->xattr.value_len);
                 break;
+        case CEPH_OSD_OP_CALL:
+                BUG_ON(!req->r_trail);
+
+                dst->cls.class_len = src->cls.class_len;
+                dst->cls.method_len = src->cls.method_len;
+                dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
+
+                ceph_pagelist_append(req->r_trail, src->cls.class_name,
+                                     src->cls.class_len);
+                ceph_pagelist_append(req->r_trail, src->cls.method_name,
+                                     src->cls.method_len);
+                ceph_pagelist_append(req->r_trail, src->cls.indata,
+                                     src->cls.indata_len);
+                break;
+        case CEPH_OSD_OP_ROLLBACK:
+                dst->snap.snapid = cpu_to_le64(src->snap.snapid);
+                break;
         case CEPH_OSD_OP_STARTSYNC:
                 break;
         default:
diff --git a/fs/ceph/osd_client.h b/fs/ceph/osd_client.h
index d583d1bf6cd9..65c9c560f1ac 100644
--- a/fs/ceph/osd_client.h
+++ b/fs/ceph/osd_client.h
@@ -134,14 +134,20 @@ struct ceph_osd_req_op {
                         __u8 cmp_mode;     /* CEPH_OSD_CMPXATTR_MODE_* */
                 } xattr;
                 struct {
+                        const char *class_name;
                         __u8 class_len;
+                        const char *method_name;
                         __u8 method_len;
                         __u8 argc;
+                        const char *indata;
                         u32 indata_len;
                 } cls;
                 struct {
                         u64 cookie, count;
                 } pgls;
+                struct {
+                        u64 snapid;
+                } snap;
         };
         u32 payload_len;
 };