diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2014-07-16 15:38:32 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-05 16:36:42 -0700 |
| commit | c7650a012929bc8e1393423e7bb29a4a6a808f12 (patch) | |
| tree | ce14f733abfe13b260c2f88b6a1898759e9c7670 /net/sunrpc/xprtrdma/svc_rdma_transport.c | |
| parent | e313ec518ba580268f03e36bc0bac3457db4c163 (diff) | |
svcrdma: Select NFSv4.1 backchannel transport based on forward channel
commit 3c45ddf823d679a820adddd53b52c6699c9a05ac upstream.
The current code always selects XPRT_TRANSPORT_BC_TCP for the back
channel, even when the forward channel was not TCP (eg, RDMA). When
a 4.1 mount is attempted with RDMA, the server panics in the TCP BC
code when trying to send CB_NULL.
Instead, construct the transport protocol number from the forward
channel transport or'd with XPRT_TRANSPORT_BC. Transports that do
not support bi-directional RPC will not have registered a "BC"
transport, causing create_backchannel_client() to fail immediately.
Fixes: https://bugzilla.linux-nfs.org/show_bug.cgi?id=265
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_transport.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index e7323fbbd348..06a5d9235107 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -92,6 +92,7 @@ struct svc_xprt_class svc_rdma_class = { .xcl_owner = THIS_MODULE, .xcl_ops = &svc_rdma_ops, .xcl_max_payload = RPCSVC_MAXPAYLOAD_TCP, + .xcl_ident = XPRT_TRANSPORT_RDMA, }; struct svc_rdma_op_ctxt *svc_rdma_get_context(struct svcxprt_rdma *xprt) |