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svcrdma: Remove sc_read_complete_q

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Now that svc_rdma_recvfrom() waits for Read completion,
sc_read_complete_q is no longer used.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-12-30 12:43:34 -05:00
parent 7d81ee8722
commit 9af723be86
3 changed files with 6 additions and 54 deletions
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2
include/linux/sunrpc/svc_rdma.h
View File

@ -106,7 +106,6 @@ struct svcxprt_rdma {
wait_queue_head_t sc_send_wait; /* SQ exhaustion waitlist */
unsigned long sc_flags;
struct list_head sc_read_complete_q;
struct work_struct sc_work;
struct llist_head sc_recv_ctxts;
@ -140,7 +139,6 @@ struct svc_rdma_recv_ctxt {
bool rc_temp;
u32 rc_byte_len;
unsigned int rc_page_count;
unsigned int rc_hdr_count;
u32 rc_inv_rkey;
__be32 rc_msgtype;

57
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
View File

@ -89,8 +89,7 @@
* svc_rdma_recvfrom call returns.
*
* During the second svc_rdma_recvfrom call, RDMA Read sink pages
* are transferred from the svc_rdma_recv_ctxt to the second svc_rqst
* (see rdma_read_complete() below).
* are transferred from the svc_rdma_recv_ctxt to the second svc_rqst.
*/
#include <linux/slab.h>
@ -379,10 +378,6 @@ void svc_rdma_flush_recv_queues(struct svcxprt_rdma *rdma)
{
struct svc_rdma_recv_ctxt *ctxt;
while ((ctxt = svc_rdma_next_recv_ctxt(&rdma->sc_read_complete_q))) {
list_del(&ctxt->rc_list);
svc_rdma_recv_ctxt_put(rdma, ctxt);
}
while ((ctxt = svc_rdma_next_recv_ctxt(&rdma->sc_rq_dto_q))) {
list_del(&ctxt->rc_list);
svc_rdma_recv_ctxt_put(rdma, ctxt);
@ -720,35 +715,6 @@ out_inval:
return -EINVAL;
}
static void rdma_read_complete(struct svc_rqst *rqstp,
struct svc_rdma_recv_ctxt *head)
{
int page_no;
/* Move Read chunk pages to rqstp so that they will be released
* when svc_process is done with them.
*/
for (page_no = 0; page_no < head->rc_page_count; page_no++) {
put_page(rqstp->rq_pages[page_no]);
rqstp->rq_pages[page_no] = head->rc_pages[page_no];
}
head->rc_page_count = 0;
/* Point rq_arg.pages past header */
rqstp->rq_arg.pages = &rqstp->rq_pages[head->rc_hdr_count];
rqstp->rq_arg.page_len = head->rc_arg.page_len;
/* rq_respages starts after the last arg page */
rqstp->rq_respages = &rqstp->rq_pages[page_no];
rqstp->rq_next_page = rqstp->rq_respages + 1;
/* Rebuild rq_arg head and tail. */
rqstp->rq_arg.head[0] = head->rc_arg.head[0];
rqstp->rq_arg.tail[0] = head->rc_arg.tail[0];
rqstp->rq_arg.len = head->rc_arg.len;
rqstp->rq_arg.buflen = head->rc_arg.buflen;
}
static void svc_rdma_send_error(struct svcxprt_rdma *rdma,
struct svc_rdma_recv_ctxt *rctxt,
int status)
@ -834,13 +800,6 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
rqstp->rq_xprt_ctxt = NULL;
spin_lock(&rdma_xprt->sc_rq_dto_lock);
ctxt = svc_rdma_next_recv_ctxt(&rdma_xprt->sc_read_complete_q);
if (ctxt) {
list_del(&ctxt->rc_list);
spin_unlock(&rdma_xprt->sc_rq_dto_lock);
rdma_read_complete(rqstp, ctxt);
goto complete;
}
ctxt = svc_rdma_next_recv_ctxt(&rdma_xprt->sc_rq_dto_q);
if (!ctxt) {
/* No new incoming requests, terminate the loop */
@ -880,21 +839,17 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp)
svc_rdma_get_inv_rkey(rdma_xprt, ctxt);
if (!pcl_is_empty(&ctxt->rc_read_pcl) ||
!pcl_is_empty(&ctxt->rc_call_pcl))
goto out_readlist;
!pcl_is_empty(&ctxt->rc_call_pcl)) {
ret = svc_rdma_process_read_list(rdma_xprt, rqstp, ctxt);
if (ret < 0)
goto out_readfail;
}
complete:
rqstp->rq_xprt_ctxt = ctxt;
rqstp->rq_prot = IPPROTO_MAX;
svc_xprt_copy_addrs(rqstp, xprt);
return rqstp->rq_arg.len;
out_readlist:
ret = svc_rdma_process_read_list(rdma_xprt, rqstp, ctxt);
if (ret < 0)
goto out_readfail;
goto complete;
out_err:
svc_rdma_send_error(rdma_xprt, ctxt, ret);
svc_rdma_recv_ctxt_put(rdma_xprt, ctxt);

1
net/sunrpc/xprtrdma/svc_rdma_transport.c
View File

@ -136,7 +136,6 @@ static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv,
svc_xprt_init(net, &svc_rdma_class, &cma_xprt->sc_xprt, serv);
INIT_LIST_HEAD(&cma_xprt->sc_accept_q);
INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q);
INIT_LIST_HEAD(&cma_xprt->sc_read_complete_q);
INIT_LIST_HEAD(&cma_xprt->sc_send_ctxts);
init_llist_head(&cma_xprt->sc_recv_ctxts);
INIT_LIST_HEAD(&cma_xprt->sc_rw_ctxts);