RDS: Do not set op_active in r_m_copy_from_user().
Do not allocate sgs for data for 0-length datagrams
Set data.op_active in rds_sendmsg() instead of
rds_message_copy_from_user().
Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/net/rds/send.c b/net/rds/send.c
index 66dc6b0..ad89a63 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -970,11 +970,14 @@
goto out;
}
- rm->data.op_sg = rds_message_alloc_sgs(rm, ceil(payload_len, PAGE_SIZE));
- /* XXX fix this to not allocate memory */
- ret = rds_message_copy_from_user(rm, msg->msg_iov, payload_len);
- if (ret)
- goto out;
+ /* Attach data to the rm */
+ if (payload_len) {
+ rm->data.op_sg = rds_message_alloc_sgs(rm, ceil(payload_len, PAGE_SIZE));
+ ret = rds_message_copy_from_user(rm, msg->msg_iov, payload_len);
+ if (ret)
+ goto out;
+ }
+ rm->data.op_active = 1;
rm->m_daddr = daddr;