SUNRPC: Transport fault injection
authorChuck Lever <chuck.lever@oracle.com>
Mon, 11 May 2015 18:02:25 +0000 (14:02 -0400)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Wed, 10 Jun 2015 22:37:26 +0000 (18:37 -0400)
commit4a06825839889cc1756d0dd8a52d6b1071ee0263
treeca49cf2fe5a77018dc473a261f8a5c243530c761
parent11598b8ff2b97cf034d0c025cf125c92b574bafc
SUNRPC: Transport fault injection

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 <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
include/linux/sunrpc/xprt.h
net/sunrpc/clnt.c
net/sunrpc/debugfs.c
net/sunrpc/xprt.c
net/sunrpc/xprtrdma/transport.c
net/sunrpc/xprtsock.c