linux.git/net/rds/connection.c, branch v4.8

RDS: TCP: Enable multipath RDS for TCP

2016-07-15T18:36:58+00:00

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 
Signed-off-by: Sowmini Varadhan 
Acked-by: Santosh Shilimkar 
Signed-off-by: David S. Miller

RDS: TCP: Simplify reconnect to avoid duelling reconnnect attempts

2016-07-01T20:45:17+00:00

When reconnecting, the peer with the smaller IP address will initiate
the reconnect, to avoid needless duelling SYN issues.

Acked-by: Santosh Shilimkar 
Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: TCP: Make rds_tcp_connection track the rds_conn_path

2016-07-01T20:45:17+00:00

The struct rds_tcp_connection is the transport-specific private
data structure that tracks TCP information per rds_conn_path.
Modify this structure to have a back-pointer to the rds_conn_path
for which it is the ->cp_transport_data.

Acked-by: Santosh Shilimkar 
Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: Rework path specific indirections

2016-07-01T20:45:17+00:00

Refactor code to avoid separate indirections for single-path
and multipath transports. All transports (both single and mp-capable)
will get a pointer to the rds_conn_path, and can trivially derive
the rds_connection from the ->cp_conn.

Acked-by: Santosh Shilimkar 
Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: Update rds_conn_destroy to be MP capable

2016-06-15T06:50:44+00:00

Refactor rds_conn_destroy() so that the per-path dismantling
is done in rds_conn_path_destroy, and then iterate as needed
over rds_conn_path_destroy().

Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: Update rds_conn_shutdown to work with rds_conn_path

2016-06-15T06:50:44+00:00

This commit changes rds_conn_shutdown to take a rds_conn_path *
argument, allowing it to shutdown paths other than c_path[0] for
MP-capable transports.

Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: Initialize all RDS_MPATH_WORKERS in __rds_conn_create

2016-06-15T06:50:44+00:00

Add a for() loop in __rds_conn_create to initialize all the
conn_paths, in preparate for MP capable transports.

Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: Add rds_conn_path_error()

2016-06-15T06:50:43+00:00

rds_conn_path_error() is the MP-aware analog of rds_conn_error,
to be used by multipath-capable callers.

Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: update rds-info related functions to traverse multiple conn_paths

2016-06-15T06:50:43+00:00

This commit updates the callbacks related to the rds-info command
so that they walk through all the rds_conn_path structures and
report the requested info.

Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller

RDS: Add rds_conn_path_connect_if_down() for MP-aware callers

2016-06-15T06:50:43+00:00

rds_conn_path_connect_if_down() works on the rds_conn_path
that it is passed. Callers who are not t_m_capable may continue
calling rds_conn_connect_if_down, which will invoke
rds_conn_path_connect_if_down() with the default c_path[0].

Signed-off-by: Sowmini Varadhan 
Signed-off-by: David S. Miller