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authorChuck Lever <chuck.lever@oracle.com>2016-05-02 14:41:22 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2016-05-17 15:47:59 -0400
commit88b18a120332cada6ff4adb9b5b7b6e4bbb653e5 (patch)
treea9e47a4b695b982b8123316d6d6dd6b20f5512f4 /net/sunrpc
parentcce6deeb56aa8aad1d3154d70ea419cf25967f5c (diff)
xprtrdma: Update comments in rpcrdma_marshal_req()
Update documenting comments to reflect code changes over the past year. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Steve Wise <swise@opengridcomputing.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c18
1 files changed, 4 insertions, 14 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 0105e65ad17f..c7c9bbbf758c 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -494,13 +494,10 @@ static void rpcrdma_inline_pullup(struct rpc_rqst *rqst)
* Marshal a request: the primary job of this routine is to choose
* the transfer modes. See comments below.
*
- * Uses multiple RDMA IOVs for a request:
- * [0] -- RPC RDMA header, which uses memory from the *start* of the
- * preregistered buffer that already holds the RPC data in
- * its middle.
- * [1] -- the RPC header/data, marshaled by RPC and the NFS protocol.
- * [2] -- optional padding.
- * [3] -- if padded, header only in [1] and data here.
+ * Prepares up to two IOVs per Call message:
+ *
+ * [0] -- RPC RDMA header
+ * [1] -- the RPC header/data
*
* Returns zero on success, otherwise a negative errno.
*/
@@ -624,13 +621,6 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst)
__func__, transfertypes[wtype], hdrlen, rpclen,
headerp, base, rdmab_lkey(req->rl_rdmabuf));
- /*
- * initialize send_iov's - normally only two: rdma chunk header and
- * single preregistered RPC header buffer, but if padding is present,
- * then use a preregistered (and zeroed) pad buffer between the RPC
- * header and any write data. In all non-rdma cases, any following
- * data has been copied into the RPC header buffer.
- */
req->rl_send_iov[0].addr = rdmab_addr(req->rl_rdmabuf);
req->rl_send_iov[0].length = hdrlen;
req->rl_send_iov[0].lkey = rdmab_lkey(req->rl_rdmabuf);