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Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_marshal.c')
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_marshal.c49
1 files changed, 26 insertions, 23 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_marshal.c b/net/sunrpc/xprtrdma/svc_rdma_marshal.c
index 0ba9887f3e22..4e7203439e2f 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_marshal.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_marshal.c
@@ -260,32 +260,35 @@ int svc_rdma_xdr_encode_error(struct svcxprt_rdma *xprt,
return (int)((unsigned long)va - (unsigned long)startp);
}
-int svc_rdma_xdr_get_reply_hdr_len(struct rpcrdma_msg *rmsgp)
+/**
+ * svc_rdma_xdr_get_reply_hdr_length - Get length of Reply transport header
+ * @rdma_resp: buffer containing Reply transport header
+ *
+ * Returns length of transport header, in bytes.
+ */
+unsigned int svc_rdma_xdr_get_reply_hdr_len(__be32 *rdma_resp)
{
- struct rpcrdma_write_array *wr_ary;
+ unsigned int nsegs;
+ __be32 *p;
- /* There is no read-list in a reply */
+ p = rdma_resp;
- /* skip write list */
- wr_ary = (struct rpcrdma_write_array *)
- &rmsgp->rm_body.rm_chunks[1];
- if (wr_ary->wc_discrim)
- wr_ary = (struct rpcrdma_write_array *)
- &wr_ary->wc_array[be32_to_cpu(wr_ary->wc_nchunks)].
- wc_target.rs_length;
- else
- wr_ary = (struct rpcrdma_write_array *)
- &wr_ary->wc_nchunks;
-
- /* skip reply array */
- if (wr_ary->wc_discrim)
- wr_ary = (struct rpcrdma_write_array *)
- &wr_ary->wc_array[be32_to_cpu(wr_ary->wc_nchunks)];
- else
- wr_ary = (struct rpcrdma_write_array *)
- &wr_ary->wc_nchunks;
-
- return (unsigned long) wr_ary - (unsigned long) rmsgp;
+ /* RPC-over-RDMA V1 replies never have a Read list. */
+ p += rpcrdma_fixed_maxsz + 1;
+
+ /* Skip Write list. */
+ while (*p++ != xdr_zero) {
+ nsegs = be32_to_cpup(p++);
+ p += nsegs * rpcrdma_segment_maxsz;
+ }
+
+ /* Skip Reply chunk. */
+ if (*p++ != xdr_zero) {
+ nsegs = be32_to_cpup(p++);
+ p += nsegs * rpcrdma_segment_maxsz;
+ }
+
+ return (unsigned long)p - (unsigned long)rdma_resp;
}
void svc_rdma_xdr_encode_write_list(struct rpcrdma_msg *rmsgp, int chunks)