[PATCH net-next 03/17] RDS: recv path gets the conn_path from rds_incoming for MP capable transports

[Sowmini Varadhan]

Transports that are t_mp_capable should set the rds_conn_path
on which the datagram was recived in the ->i_conn_path field
of struct rds_incoming.

Signed-off-by: Sowmini Varadhan <sowmini.varad...@oracle.com>
---
 net/rds/rds.h  |    1 +
 net/rds/recv.c |   12 ++++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/net/rds/rds.h b/net/rds/rds.h
index 28f001c..7c85b2d 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -231,6 +231,7 @@ struct rds_incoming {
        atomic_t                i_refcount;
        struct list_head        i_item;
        struct rds_connection   *i_conn;
+       struct rds_conn_path    *i_conn_path;
        struct rds_header       i_hdr;
        unsigned long           i_rx_jiffies;
        __be32                  i_saddr;
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 78b5c43..e36652c 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -38,7 +38,6 @@
 #include <linux/time.h>
 #include <linux/rds.h>
 
-#include "rds_single_path.h"
 #include "rds.h"
 
 void rds_inc_init(struct rds_incoming *inc, struct rds_connection *conn,
@@ -165,13 +164,18 @@ void rds_recv_incoming(struct rds_connection *conn, 
__be32 saddr, __be32 daddr,
        struct rds_sock *rs = NULL;
        struct sock *sk;
        unsigned long flags;
+       struct rds_conn_path *cp;
 
        inc->i_conn = conn;
        inc->i_rx_jiffies = jiffies;
+       if (conn->c_trans->t_mp_capable)
+               cp = inc->i_conn_path;
+       else
+               cp = &conn->c_path[0];
 
        rdsdebug("conn %p next %llu inc %p seq %llu len %u sport %u dport %u "
                 "flags 0x%x rx_jiffies %lu\n", conn,
-                (unsigned long long)conn->c_next_rx_seq,
+                (unsigned long long)cp->cp_next_rx_seq,
                 inc,
                 (unsigned long long)be64_to_cpu(inc->i_hdr.h_sequence),
                 be32_to_cpu(inc->i_hdr.h_len),
@@ -200,12 +204,12 @@ void rds_recv_incoming(struct rds_connection *conn, 
__be32 saddr, __be32 daddr,
         * XXX we could spend more on the wire to get more robust failure
         * detection, arguably worth it to avoid data corruption.
         */
-       if (be64_to_cpu(inc->i_hdr.h_sequence) < conn->c_next_rx_seq &&
+       if (be64_to_cpu(inc->i_hdr.h_sequence) < cp->cp_next_rx_seq &&
            (inc->i_hdr.h_flags & RDS_FLAG_RETRANSMITTED)) {
                rds_stats_inc(s_recv_drop_old_seq);
                goto out;
        }
-       conn->c_next_rx_seq = be64_to_cpu(inc->i_hdr.h_sequence) + 1;
+       cp->cp_next_rx_seq = be64_to_cpu(inc->i_hdr.h_sequence) + 1;
 
        if (rds_sysctl_ping_enable && inc->i_hdr.h_dport == 0) {
                rds_stats_inc(s_recv_ping);
-- 
1.7.1