linux-toradex.git/net/sunrpc/xprt.c, branch v4.9.123

SUNRPC: Generalize the RPC buffer release API

2016-09-19T17:08:37+00:00

xprtrdma needs to allocate the Call and Reply buffers separately.
TBH, the reliance on using a single buffer for the pair of XDR
buffers is transport implementation-specific.

Instead of passing just the rq_buffer into the buf_free method, pass
the task structure and let buf_free take care of freeing both
XDR buffers at once.

There's a micro-optimization here. In the common case, both
xprt_release and the transport's buf_free method were checking if
rq_buffer was NULL. Now the check is done only once per RPC.

Signed-off-by: Chuck Lever 
Signed-off-by: Anna Schumaker

SUNRPC: Fix up socket autodisconnect

2016-08-02T17:47:43+00:00

Ensure that we don't forget to set up the disconnection timer for the
case when a connect request is fulfilled after the RPC request that
initiated it has timed out or been interrupted.

Signed-off-by: Trond Myklebust

SUNRPC: Reduce latency when send queue is congested

2016-06-13T16:35:51+00:00

Use the low latency transport workqueue to process the task that is
next in line on the xprt->sending queue.

Signed-off-by: Trond Myklebust

SUNRPC: RPC transport queue must be low latency

2016-06-13T16:35:51+00:00

rpciod can easily get congested due to the long list of queued rpc_tasks.
Having the receive queue wait in turn for those tasks to complete can
therefore be a bottleneck.

Address the problem by separating the workqueues into:
- rpciod: manages rpc_tasks
- xprtiod: manages transport related work.

Signed-off-by: Trond Myklebust

SUNRPC: Use the multipath iterator to assign a transport to each task

2016-02-05T23:48:55+00:00

Signed-off-by: Trond Myklebust

SUNRPC: Add a structure to track multiple transports

2016-02-05T23:48:54+00:00

In order to support multipathing/trunking we will need the ability to
track multiple transports. This patch sets up a basic structure for
doing so.

Signed-off-by: Trond Myklebust

SUNRPC: Make freeing of struct xprt rcu-safe

2016-02-01T02:37:23+00:00

Have it call kfree_rcu() to ensure that we can use it on rcu-protected
lists.

Signed-off-by: Trond Myklebust

SUNRPC: Uninline xprt_get(); It isn't performance critical.

2016-02-01T02:37:22+00:00

Also allow callers to pass NULL arguments to xprt_get() and xprt_put().

Signed-off-by: Trond Myklebust

svcrdma: Add class for RDMA backwards direction transport

2016-01-19T20:30:48+00:00

To support the server-side of an NFSv4.1 backchannel on RDMA
connections, add a transport class that enables backward
direction messages on an existing forward channel connection.

Signed-off-by: Chuck Lever 
Acked-by: Bruce Fields 
Signed-off-by: Doug Ledford

SUNRPC: Lock the transport layer on shutdown

2015-09-19T20:37:43+00:00

Avoid all races with the connect/disconnect handlers by taking the
transport lock.

Reported-by:"Suzuki K. Poulose" 
Acked-by: Jeff Layton 
Signed-off-by: Trond Myklebust