[PATCH v2 13/19] svcrdma: Remove unused Read completion handlers

Chuck Lever
2017-06-16T15:22:06Z

Clean up:

The generic RDMA R/W API conversion of svc_rdma_recvfrom replaced
the Register, Read, and Invalidate completion handlers. Remove the
old ones, which are no longer used.

These handlers shared some helper code with svc_rdma_wc_send. Fold
the wc_common helper back into the one remaining completion handler.

Signed-off-by: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
---
include/linux/sunrpc/svc_rdma.h | 4 -
net/sunrpc/xprtrdma/svc_rdma_transport.c | 93 +++---------------------------
2 files changed, 10 insertions(+), 87 deletions(-)

diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index b1ba19b..06d58a3 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -77,17 +77,15 @@ enum {
*/
struct svc_rdma_op_ctxt {
struct list_head list;
- struct svc_rdma_op_ctxt *read_hdr;
struct svc_rdma_fastreg_mr *frmr;
- int hdr_count;
struct xdr_buf arg;
struct ib_cqe cqe;
u32 byte_len;
struct svcxprt_rdma *xprt;
- unsigned long flags;
enum dma_data_direction direction;
int count;
unsigned int mapped_sges;
+ int hdr_count;
struct ib_send_wr send_wr;
struct ib_sge sge[1 + RPCRDMA_MAX_INLINE_THRESH / PAGE_SIZE];
struct page *pages[RPCSVC_MAXPAGES];
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 72d2dcd..c915cba 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -346,36 +346,6 @@ static void svc_rdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
svc_xprt_put(&xprt->sc_xprt);
}

-static void svc_rdma_send_wc_common(struct svcxprt_rdma *xprt,
- struct ib_wc *wc,
- const char *opname)
-{
- if (wc->status != IB_WC_SUCCESS)
- goto err;
-
-out:
- atomic_inc(&xprt->sc_sq_avail);
- wake_up(&xprt->sc_send_wait);
- return;
-
-err:
- set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
- if (wc->status != IB_WC_WR_FLUSH_ERR)
- pr_err("svcrdma: %s: %s (%u/0x%x)\n",
- opname, ib_wc_status_msg(wc->status),
- wc->status, wc->vendor_err);
- goto out;
-}
-
-static void svc_rdma_send_wc_common_put(struct ib_cq *cq, struct ib_wc *wc,
- const char *opname)
-{
- struct svcxprt_rdma *xprt = cq->cq_context;
-
- svc_rdma_send_wc_common(xprt, wc, opname);
- svc_xprt_put(&xprt->sc_xprt);
-}
-
/**
* svc_rdma_wc_send - Invoked by RDMA provider for each polled Send WC
* @cq: completion queue
@@ -384,73 +354,28 @@ static void svc_rdma_send_wc_common_put(struct ib_cq *cq, struct ib_wc *wc,
*/
void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
{
- struct ib_cqe *cqe = wc->wr_cqe;
- struct svc_rdma_op_ctxt *ctxt;
-
- svc_rdma_send_wc_common_put(cq, wc, "send");
-
- ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe);
- svc_rdma_unmap_dma(ctxt);
- svc_rdma_put_context(ctxt, 1);
-}
-
-/**
- * svc_rdma_wc_reg - Invoked by RDMA provider for each polled FASTREG WC
- * @cq: completion queue
- * @wc: completed WR
- *
- */
-void svc_rdma_wc_reg(struct ib_cq *cq, struct ib_wc *wc)
-{
- svc_rdma_send_wc_common_put(cq, wc, "fastreg");
-}
-
-/**
- * svc_rdma_wc_read - Invoked by RDMA provider for each polled Read WC
- * @cq: completion queue
- * @wc: completed WR
- *
- */
-void svc_rdma_wc_read(struct ib_cq *cq, struct ib_wc *wc)
-{
struct svcxprt_rdma *xprt = cq->cq_context;
struct ib_cqe *cqe = wc->wr_cqe;
struct svc_rdma_op_ctxt *ctxt;

- svc_rdma_send_wc_common(xprt, wc, "read");
+ atomic_inc(&xprt->sc_sq_avail);
+ wake_up(&xprt->sc_send_wait);

ctxt = container_of(cqe, struct svc_rdma_op_ctxt, cqe);
svc_rdma_unmap_dma(ctxt);
- svc_rdma_put_frmr(xprt, ctxt->frmr);
-
- if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) {
- struct svc_rdma_op_ctxt *read_hdr;
-
- read_hdr = ctxt->read_hdr;
- spin_lock(&xprt->sc_rq_dto_lock);
- list_add_tail(&read_hdr->list,
- &xprt->sc_read_complete_q);
- spin_unlock(&xprt->sc_rq_dto_lock);
+ svc_rdma_put_context(ctxt, 1);

- set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags);
- svc_xprt_enqueue(&xprt->sc_xprt);
+ if (unlikely(wc->status != IB_WC_SUCCESS)) {
+ set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
+ if (wc->status != IB_WC_WR_FLUSH_ERR)
+ pr_err("svcrdma: Send: %s (%u/0x%x)\n",
+ ib_wc_status_msg(wc->status),
+ wc->status, wc->vendor_err);
}

- svc_rdma_put_context(ctxt, 0);
svc_xprt_put(&xprt->sc_xprt);
}

-/**
- * svc_rdma_wc_inv - Invoked by RDMA provider for each polled LOCAL_INV WC
- * @cq: completion queue
- * @wc: completed WR
- *
- */
-void svc_rdma_wc_inv(struct ib_cq *cq, struct ib_wc *wc)
-{
- svc_rdma_send_wc_common_put(cq, wc, "localInv");
-}
-
static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv,
int listener)
{

--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in