linux-stable.git/include/linux/sunrpc/xprt.h, branch linux-4.8.y

SUNRPC: Limit the reconnect backoff timer to the max RPC message timeout

2016-08-05T18:12:09+00:00

...and ensure that we propagate it to new transports on the same
client.

Signed-off-by: Trond Myklebust

rpc: share one xps between all backchannels

2016-06-15T14:32:25+00:00

The spec allows backchannels for multiple clients to share the same tcp
connection.  When that happens, we need to use the same xprt for all of
them.  Similarly, we need the same xps.

This fixes list corruption introduced by the multipath code.

Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields 
Acked-by: Trond Myklebust

sunrpc: Advertise maximum backchannel payload size

2016-05-17T19:47:57+00:00

RPC-over-RDMA transports have a limit on how large a backward
direction (backchannel) RPC message can be. Ensure that the NFSv4.x
CREATE_SESSION operation advertises this limit to servers.

Signed-off-by: Chuck Lever 
Tested-by: Steve Wise 
Signed-off-by: Anna Schumaker

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

NFS: Enable client side NFSv4.1 backchannel to use other transports

2015-11-02T21:29:13+00:00

Forechannel transports get their own "bc_up" method to create an
endpoint for the backchannel service.

Signed-off-by: Chuck Lever 
[Anna Schumaker: Add forward declaration of struct net to xprt.h]
Signed-off-by: Anna Schumaker

svcrdma: Add backward direction service for RPC/RDMA transport

2015-11-02T18:45:15+00:00

On NFSv4.1 mount points, the Linux NFS client uses this transport
endpoint to receive backward direction calls and route replies back
to the NFSv4.1 server.

Signed-off-by: Chuck Lever 
Acked-by: "J. Bruce Fields" 
Reviewed-by: Sagi Grimberg 
Tested-By: Devesh Sharma 
Signed-off-by: Anna Schumaker

SUNRPC: Abstract backchannel operations

2015-11-02T18:45:15+00:00

xprt_{setup,destroy}_backchannel() won't be adequate for RPC/RMDA
bi-direction. In particular, receive buffers have to be pre-
registered and posted in order to receive incoming backchannel
requests.

Add a virtual function call to allow the insertion of appropriate
backchannel setup and destruction methods for each transport.

In addition, freeing a backchannel request is a little different
for RPC/RDMA. Introduce an rpc_xprt_op to handle the difference.

Signed-off-by: Chuck Lever 
Reviewed-by: Sagi Grimberg 
Tested-By: Devesh Sharma 
Signed-off-by: Anna Schumaker

SUNRPC: Transport fault injection

2015-06-10T22:37:26+00:00

It has been exceptionally useful to exercise the logic that handles
local immediate errors and RDMA connection loss.  To enable
developers to test this regularly and repeatably, add logic to
simulate connection loss every so often.

Fault injection is disabled by default. It is enabled with

  $ sudo echo xxx > /sys/kernel/debug/sunrpc/inject_fault/disconnect

where "xxx" is a large positive number of transport method calls
before a disconnect. A value of several thousand is usually a good
number that allows reasonable forward progress while still causing a
lot of connection drops.

These hooks are disabled when SUNRPC_DEBUG is turned off.

Signed-off-by: Chuck Lever 
Signed-off-by: Trond Myklebust