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svcrdma: Update synopsis of svc_rdma_send_reply_chunk() 

Preparing for subsequent patches, no behavior change expected.

Pass the RPC Call's svc_rdma_recv_ctxt deeper into the sendto()
path. This enables passing more information about Requester-
provided Write and Reply chunks into the lower-level send
functions.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-03-02 15:02:19 -05:00
parent 2fe8c44633
commit 6fa5785e78
3 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/sunrpc/svc_rdma.h
View File

@ -179,7 +179,7 @@ extern int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma,
unsigned int offset,
unsigned long length);
extern int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
__be32 *rp_ch, bool writelist,
const struct svc_rdma_recv_ctxt *rctxt,
struct xdr_buf *xdr);
/* svc_rdma_sendto.c */

12
net/sunrpc/xprtrdma/svc_rdma_rw.c
View File

@ -545,8 +545,7 @@ out_err:
/**
* svc_rdma_send_reply_chunk - Write all segments in the Reply chunk
* @rdma: controlling RDMA transport
* @rp_ch: Reply chunk provided by client
* @writelist: true if client provided a Write list
* @rctxt: Write and Reply chunks from client
* @xdr: xdr_buf containing an RPC Reply
*
* Returns a non-negative number of bytes the chunk consumed, or
@ -556,13 +555,14 @@ out_err:
* %-ENOTCONN if posting failed (connection is lost),
* %-EIO if rdma_rw initialization failed (DMA mapping, etc).
*/
int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, __be32 *rp_ch,
bool writelist, struct xdr_buf *xdr)
int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma,
const struct svc_rdma_recv_ctxt *rctxt,
struct xdr_buf *xdr)
{
struct svc_rdma_write_info *info;
int consumed, ret;
info = svc_rdma_write_info_alloc(rdma, rp_ch);
info = svc_rdma_write_info_alloc(rdma, rctxt->rc_reply_chunk);
if (!info)
return -ENOMEM;
@ -574,7 +574,7 @@ int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, __be32 *rp_ch,
/* Send the page list in the Reply chunk only if the
* client did not provide Write chunks.
*/
if (!writelist && xdr->page_len) {
if (!rctxt->rc_write_list && xdr->page_len) {
ret = svc_rdma_send_xdr_pagelist(info, xdr,
xdr->head[0].iov_len,
xdr->page_len);

2
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View File

@ -833,7 +833,7 @@ int svc_rdma_sendto(struct svc_rqst *rqstp)
svc_rdma_xdr_encode_write_list(rdma_resp, wr_lst, ret);
}
if (rp_ch) {
ret = svc_rdma_send_reply_chunk(rdma, rp_ch, wr_lst, xdr);
ret = svc_rdma_send_reply_chunk(rdma, rctxt, &rqstp->rq_res);
if (ret < 0)
goto err2;
svc_rdma_xdr_encode_reply_chunk(rdma_resp, rp_ch, ret);