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| author | Sowmini Varadhan <sowmini.varadhan@oracle.com> | 2016-07-14 03:51:03 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-07-15 11:36:58 -0700 |
| commit | 5916e2c1554f3e36f770401c989c3c7fadf619ca (patch) | |
| tree | e2f85d0d6ad83d6835b131956324d6e30c4eda3e /net/rds/tcp_send.c | |
| parent | ac3615e7f3cffe2a1a6b25172dfd09e138593d82 (diff) | |
| download | linux-5916e2c1554f3e36f770401c989c3c7fadf619ca.tar.gz linux-5916e2c1554f3e36f770401c989c3c7fadf619ca.tar.bz2 linux-5916e2c1554f3e36f770401c989c3c7fadf619ca.zip | |
RDS: TCP: Enable multipath RDS for TCP
Use RDS probe-ping to compute how many paths may be used with
the peer, and to synchronously start the multiple paths. If mprds is
supported, hash outgoing traffic to one of multiple paths in rds_sendmsg()
when multipath RDS is supported by the transport.
CC: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/tcp_send.c')
| -rw-r--r-- | net/rds/tcp_send.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/net/rds/tcp_send.c b/net/rds/tcp_send.c index 57e0f5826406..89d09b481f47 100644 --- a/net/rds/tcp_send.c +++ b/net/rds/tcp_send.c @@ -81,7 +81,8 @@ static int rds_tcp_sendmsg(struct socket *sock, void *data, unsigned int len) int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm, unsigned int hdr_off, unsigned int sg, unsigned int off) { - struct rds_tcp_connection *tc = conn->c_transport_data; + struct rds_conn_path *cp = rm->m_inc.i_conn_path; + struct rds_tcp_connection *tc = cp->cp_transport_data; int done = 0; int ret = 0; int more; @@ -150,10 +151,17 @@ out: rds_tcp_stats_inc(s_tcp_sndbuf_full); ret = 0; } else { - printk(KERN_WARNING "RDS/tcp: send to %pI4 " - "returned %d, disconnecting and reconnecting\n", - &conn->c_faddr, ret); - rds_conn_drop(conn); + /* No need to disconnect/reconnect if path_drop + * has already been triggered, because, e.g., of + * an incoming RST. + */ + if (rds_conn_path_up(cp)) { + pr_warn("RDS/tcp: send to %pI4 on cp [%d]" + "returned %d, " + "disconnecting and reconnecting\n", + &conn->c_faddr, cp->cp_index, ret); + rds_conn_path_drop(cp); + } } } if (done == 0) |