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| author | Chuck Lever | 2015-05-11 20:02:25 +0200 |
|---|---|---|
| committer | Trond Myklebust | 2015-06-11 00:37:26 +0200 |
| commit | 4a06825839889cc1756d0dd8a52d6b1071ee0263 (patch) | |
| tree | ca49cf2fe5a77018dc473a261f8a5c243530c761 /net/sunrpc/xprtrdma | |
| parent | NFS: Remove unused nfs_rw_ops->rw_release() function (diff) | |
| download | kernel-qcow2-linux-4a06825839889cc1756d0dd8a52d6b1071ee0263.tar.gz kernel-qcow2-linux-4a06825839889cc1756d0dd8a52d6b1071ee0263.tar.xz kernel-qcow2-linux-4a06825839889cc1756d0dd8a52d6b1071ee0263.zip | |
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>
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/transport.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index ebf6fe759f0e..b8aac23b1b0c 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -246,6 +246,16 @@ xprt_rdma_connect_worker(struct work_struct *work) xprt_clear_connecting(xprt); } +static void +xprt_rdma_inject_disconnect(struct rpc_xprt *xprt) +{ + struct rpcrdma_xprt *r_xprt = container_of(xprt, struct rpcrdma_xprt, + rx_xprt); + + pr_info("rpcrdma: injecting transport disconnect on xprt=%p\n", xprt); + rdma_disconnect(r_xprt->rx_ia.ri_id); +} + /* * xprt_rdma_destroy * @@ -714,6 +724,7 @@ static struct rpc_xprt_ops xprt_rdma_procs = { .print_stats = xprt_rdma_print_stats, .enable_swap = xprt_rdma_enable_swap, .disable_swap = xprt_rdma_disable_swap, + .inject_disconnect = xprt_rdma_inject_disconnect }; static struct xprt_class xprt_rdma = { |