RDS: Rewrite rds_send_xmit

Simplify rds_send_xmit().

Send a congestion map (via xmit_cong_map) without
decrementing send_quota.

Move resetting of conn xmit variables to end of loop.

Update comments.

Implement a special case to turn off sending an rds header
when there is an atomic op and no other data.

Signed-off-by: Andy Grover <andy.grover@oracle.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/net/rds/rds.h b/net/rds/rds.h
index d70284989124..13ed30ac424d 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -96,8 +96,9 @@ struct rds_connection {
         unsigned long           c_xmit_sg;
         unsigned int            c_xmit_hdr_off;
         unsigned int            c_xmit_data_off;
-        unsigned int            c_xmit_rdma_sent;
         unsigned int            c_xmit_atomic_sent;
+        unsigned int            c_xmit_rdma_sent;
+        unsigned int            c_xmit_data_sent;
 
         spinlock_t              c_lock;         /* protect msg queues */
         u64                     c_next_tx_seq;
@@ -120,8 +121,6 @@ struct rds_connection {
 
         struct list_head        c_map_item;
         unsigned long           c_map_queued;
-        unsigned long           c_map_offset;
-        unsigned long           c_map_bytes;
 
         unsigned int            c_unacked_packets;
         unsigned int            c_unacked_bytes;