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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 16:28:37 -0700 |
| commit | c73df6f73c8167b9ed68d653d1a5c761c209d2b5 (patch) | |
| tree | 32de203ceef2bc2440be770ee8cc56e3032ec132 /fs | |
| parent | caacbac7bf646a29049bec3d9f5fcc20c846b3b2 (diff) | |
| download | linux-3.10-c73df6f73c8167b9ed68d653d1a5c761c209d2b5.tar.gz linux-3.10-c73df6f73c8167b9ed68d653d1a5c761c209d2b5.tar.bz2 linux-3.10-c73df6f73c8167b9ed68d653d1a5c761c209d2b5.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 'fs')
| -rw-r--r-- | fs/nfsd/nfs4callback.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 3eaa6e30a2d..cc8c5b32043 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -672,7 +672,8 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c clp->cl_cb_session = ses; args.bc_xprt = conn->cb_xprt; args.prognumber = clp->cl_cb_session->se_cb_prog; - args.protocol = XPRT_TRANSPORT_BC_TCP; + args.protocol = conn->cb_xprt->xpt_class->xcl_ident | + XPRT_TRANSPORT_BC; args.authflavor = ses->se_cb_sec.flavor; } /* Create RPC client */ |