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authorChuck Lever <chuck.lever@oracle.com>2016-02-15 16:23:59 +0100
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2016-02-17 16:23:52 +0100
commit9f74660bcf1e4cca577be99e54bc77b5df62b508 (patch)
tree670160551d7f95c073da825b72d2f4073b09c7d3 /net
parentxprtrdma: Revert commit e7104a2a9606 ('xprtrdma: Cap req_cqinit'). (diff)
downloadlinux-9f74660bcf1e4cca577be99e54bc77b5df62b508.tar.xz
linux-9f74660bcf1e4cca577be99e54bc77b5df62b508.zip
xprtrdma: rpcrdma_bc_receive_call() should init rq_private_buf.len
Some NFSv4.1 OPEN requests were hanging waiting for the NFS server to finish recalling delegations. Turns out that each NFSv4.1 CB request on RDMA gets a GARBAGE_ARGS reply from the Linux client. Commit 756b9b37cfb2e3dc added a line in bc_svc_process that overwrites the incoming rq_rcv_buf's length with the value in rq_private_buf.len. But rpcrdma_bc_receive_call() does not invoke xprt_complete_bc_request(), thus rq_private_buf.len is not initialized. svc_process_common() is invoked with a zero-length RPC message, and fails. Fixes: 756b9b37cfb2e3dc ('SUNRPC: Fix callback channel') Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xprtrdma/backchannel.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c
index cc1251d07297..2dcd7640eeb5 100644
--- a/net/sunrpc/xprtrdma/backchannel.c
+++ b/net/sunrpc/xprtrdma/backchannel.c
@@ -341,6 +341,8 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt,
rqst->rq_reply_bytes_recvd = 0;
rqst->rq_bytes_sent = 0;
rqst->rq_xid = headerp->rm_xid;
+
+ rqst->rq_private_buf.len = size;
set_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state);
buf = &rqst->rq_rcv_buf;