changes to rpc

- use mem-pool for requests and saved_frames.
  - preserve the rpc_req structure till rpc invokes program's reply.
    This will enable us to store transport specific data that has to
    last till reply has come (eg., memory regions of chunk lists in
    case of rdma).
  - change signature of rpc_clnt_submit to accept rsphdr_vector and
    rsppayload_vector. The buffers pointed by these vectors will be
    from iobufs and these iobufs are added to an iobref which should
    also be passed as an arguement to rpc_clnt_submit.

Signed-off-by: Raghavendra G <raghavendra@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

2 files changed, 5 insertions, 9 deletions

diff --git a/xlators/protocol/client/src/client.c b/xlators/protocol/client/src/client.c
index 383f52bc972..c8bbd467206 100644
--- a/xlators/protocol/client/src/client.c
+++ b/xlators/protocol/client/src/client.c
@@ -96,7 +96,7 @@ client_submit_request (xlator_t *this, void *req, call_frame_t *frame,
         }
         /* Send the msg */
         ret = rpc_clnt_submit (conf->rpc, prog, procnum, cbk, &iov, count, NULL, 0,
-                               iobref, frame);
+                               iobref, frame, NULL, 0, NULL, 0, NULL);
 
         if (ret == 0) {
                 pthread_mutex_lock (&conf->rpc->conn.lock);
diff --git a/xlators/protocol/client/src/client3_1-fops.c b/xlators/protocol/client/src/client3_1-fops.c
index 136f84bf560..52d5c093a60 100644
--- a/xlators/protocol/client/src/client3_1-fops.c
+++ b/xlators/protocol/client/src/client3_1-fops.c
@@ -80,7 +80,8 @@ client_submit_vec_request (xlator_t  *this, void *req, call_frame_t  *frame,
         }
         /* Send the msg */
         ret = rpc_clnt_submit (conf->rpc, prog, procnum, cbk, &iov, count,
-                               payload, payloadcnt, iobref, frame);
+                               payload, payloadcnt, iobref, frame, NULL, 0,
+                               NULL, 0, NULL);
 
         if (ret == 0) {
                 pthread_mutex_lock (&conf->rpc->conn.lock);
@@ -2001,13 +2002,12 @@ client3_1_readv_cbk (struct rpc_req *req, struct iovec *iov, int count,
         }
 
         if (rsp.op_ret != -1) {
-                iobref = iobref_new ();
+                iobref = req->rsp_iobref;
                 gf_stat_to_iatt (&rsp.stat, &stat);
                 vector.iov_len  = rsp.op_ret;
 
                 if (rsp.op_ret > 0) {
-                        vector.iov_base = req->rsp_procpayload->ptr;
-                        iobref_add (iobref, req->rsp_procpayload);
+                        vector.iov_base = req->rsp[1].iov_base;
                 }
         }
 out:
@@ -2015,10 +2015,6 @@ out:
                              gf_error_to_errno (rsp.op_errno), &vector, 1,
                              &stat, iobref);
 
-        if (iobref) {
-                iobref_unref (iobref);
-        }
-
         return 0;
 }