diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2016-03-01 19:06:47 +0100 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2016-03-01 22:06:39 +0100 |
| commit | f3ea53fb3bc3908b6e9ef39e53a75b55df7f78f8 (patch) | |
| tree | 8a4114f5dcdffce6166fbf77eded7b2638d4c2ee /net/sunrpc/xprtrdma | |
| parent | svcrdma: Make RDMA_ERROR messages work (diff) | |
| download | linux-f3ea53fb3bc3908b6e9ef39e53a75b55df7f78f8.tar.xz linux-f3ea53fb3bc3908b6e9ef39e53a75b55df7f78f8.zip | |
svcrdma: Use correct XID in error replies
When constructing an error reply, svc_rdma_xdr_encode_error()
needs to view the client's request message so it can get the
failing request's XID.
svc_rdma_xdr_decode_req() is supposed to return a pointer to the
client's request header. But if it fails to decode the client's
message (and thus an error reply is needed) it does not return the
pointer. The server then sends a bogus XID in the error reply.
Instead, unconditionally generate the pointer to the client's header
in svc_rdma_recvfrom(), and pass that pointer to both functions.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Devesh Sharma <devesh.sharma@broadcom.com>
Tested-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_marshal.c | 7 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 3 |
2 files changed, 3 insertions, 7 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_marshal.c b/net/sunrpc/xprtrdma/svc_rdma_marshal.c index f74fc523d95b..b9ce01f6af90 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_marshal.c +++ b/net/sunrpc/xprtrdma/svc_rdma_marshal.c @@ -145,15 +145,11 @@ static __be32 *decode_reply_array(__be32 *va, __be32 *vaend) return (__be32 *)&ary->wc_array[nchunks]; } -int svc_rdma_xdr_decode_req(struct rpcrdma_msg **rdma_req, - struct svc_rqst *rqstp) +int svc_rdma_xdr_decode_req(struct rpcrdma_msg *rmsgp, struct svc_rqst *rqstp) { - struct rpcrdma_msg *rmsgp = NULL; __be32 *va, *vaend; u32 hdr_len; - rmsgp = (struct rpcrdma_msg *)rqstp->rq_arg.head[0].iov_base; - /* Verify that there's enough bytes for header + something */ if (rqstp->rq_arg.len <= RPCRDMA_HDRLEN_MIN) { dprintk("svcrdma: header too short = %d\n", @@ -201,7 +197,6 @@ int svc_rdma_xdr_decode_req(struct rpcrdma_msg **rdma_req, hdr_len = (unsigned long)va - (unsigned long)rmsgp; rqstp->rq_arg.head[0].iov_len -= hdr_len; - *rdma_req = rmsgp; return hdr_len; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 0f09052110a7..8f68cb6d89fe 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -653,7 +653,8 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) rdma_build_arg_xdr(rqstp, ctxt, ctxt->byte_len); /* Decode the RDMA header. */ - ret = svc_rdma_xdr_decode_req(&rmsgp, rqstp); + rmsgp = (struct rpcrdma_msg *)rqstp->rq_arg.head[0].iov_base; + ret = svc_rdma_xdr_decode_req(rmsgp, rqstp); if (ret < 0) goto out_err; rqstp->rq_xprt_hlen = ret; |