rpcrdma: Add RPCRDMA_HDRLEN_ERR

Error headers are shorter than either RDMA_MSG or RDMA_NOMSG.

Since HDRLEN_MIN is already used in several other places that would
be annoying to change, add RPCRDMA_HDRLEN_ERR for the one or two
spots where the shorter length is needed.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Devesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/include/linux/sunrpc/rpc_rdma.h b/include/linux/sunrpc/rpc_rdma.h
index f33c5a4..8c6d23c 100644 (file)
--- a/include/linux/sunrpc/rpc_rdma.h
+++ b/include/linux/sunrpc/rpc_rdma.h
@@ -102,6 +102,7 @@ struct rpcrdma_msg {
  * Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks
  */
 #define RPCRDMA_HDRLEN_MIN     (sizeof(__be32) * 7)
+#define RPCRDMA_HDRLEN_ERR     (sizeof(__be32) * 5)
 
 enum rpcrdma_errcode {
        ERR_VERS = 1,