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| author | Chuck Lever <chuck.lever@oracle.com> | 2014-07-16 15:38:32 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-05 16:34:18 -0700 |
| commit | 96a93162e29169cb7cd5b0343953b6e41b260b1f (patch) | |
| tree | 85c5eb04e4fcd3ca3049f5621f5eefbef2eefb94 /include | |
| parent | 78359f18aa15699d96b613c8cb7b43471c7157da (diff) | |
| download | lwn-96a93162e29169cb7cd5b0343953b6e41b260b1f.tar.gz lwn-96a93162e29169cb7cd5b0343953b6e41b260b1f.zip | |
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 'include')
| -rw-r--r-- | include/linux/sunrpc/svc_xprt.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index b05963f09ebf..f5bfb1a80abe 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -32,6 +32,7 @@ struct svc_xprt_class { struct svc_xprt_ops *xcl_ops; struct list_head xcl_list; u32 xcl_max_payload; + int xcl_ident; }; /* |