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-rw-r--r--include/linux/sunrpc/svc_rdma.h1
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_recvfrom.c58
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_transport.c5
3 files changed, 16 insertions, 48 deletions
diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index d0011f3db90..c447c417b37 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -71,6 +71,7 @@ extern atomic_t rdma_stat_sq_prod;
* completes.
*/
struct svc_rdma_op_ctxt {
+ struct svc_rdma_op_ctxt *read_hdr;
struct svc_rdma_op_ctxt *next;
struct xdr_buf arg;
struct list_head dto_q;
diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
index 80c6ee82c34..21a1e625ef0 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
@@ -289,7 +289,6 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt,
u64 sgl_offset;
struct rpcrdma_read_chunk *ch;
struct svc_rdma_op_ctxt *ctxt = NULL;
- struct svc_rdma_op_ctxt *head;
struct svc_rdma_op_ctxt *tmp_sge_ctxt;
struct svc_rdma_op_ctxt *tmp_ch_ctxt;
struct chunk_sge *ch_sge_ary;
@@ -310,20 +309,13 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt,
sge_count = rdma_rcl_to_sge(xprt, rqstp, hdr_ctxt, rmsgp,
sge, ch_sge_ary,
ch_count, byte_count);
- head = svc_rdma_get_context(xprt);
sgl_offset = 0;
ch_no = 0;
for (ch = (struct rpcrdma_read_chunk *)&rmsgp->rm_body.rm_chunks[0];
ch->rc_discrim != 0; ch++, ch_no++) {
next_sge:
- if (!ctxt)
- ctxt = head;
- else {
- ctxt->next = svc_rdma_get_context(xprt);
- ctxt = ctxt->next;
- }
- ctxt->next = NULL;
+ ctxt = svc_rdma_get_context(xprt);
ctxt->direction = DMA_FROM_DEVICE;
clear_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags);
@@ -351,20 +343,15 @@ next_sge:
* the client and the RPC needs to be enqueued.
*/
set_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags);
- ctxt->next = hdr_ctxt;
- hdr_ctxt->next = head;
+ ctxt->read_hdr = hdr_ctxt;
}
/* Post the read */
err = svc_rdma_send(xprt, &read_wr);
if (err) {
- printk(KERN_ERR "svcrdma: Error posting send = %d\n",
+ printk(KERN_ERR "svcrdma: Error %d posting RDMA_READ\n",
err);
- /*
- * Break the circular list so free knows when
- * to stop if the error happened to occur on
- * the last read
- */
- ctxt->next = NULL;
+ set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
+ svc_rdma_put_context(ctxt, 0);
goto out;
}
atomic_inc(&rdma_stat_read);
@@ -375,7 +362,7 @@ next_sge:
goto next_sge;
}
sgl_offset = 0;
- err = 0;
+ err = 1;
}
out:
@@ -393,25 +380,12 @@ next_sge:
while (rqstp->rq_resused)
rqstp->rq_respages[--rqstp->rq_resused] = NULL;
- if (err) {
- printk(KERN_ERR "svcrdma : RDMA_READ error = %d\n", err);
- set_bit(XPT_CLOSE, &xprt->sc_xprt.xpt_flags);
- /* Free the linked list of read contexts */
- while (head != NULL) {
- ctxt = head->next;
- svc_rdma_put_context(head, 1);
- head = ctxt;
- }
- return err;
- }
-
- return 1;
+ return err;
}
static int rdma_read_complete(struct svc_rqst *rqstp,
- struct svc_rdma_op_ctxt *data)
+ struct svc_rdma_op_ctxt *head)
{
- struct svc_rdma_op_ctxt *head = data->next;
int page_no;
int ret;
@@ -437,22 +411,12 @@ static int rdma_read_complete(struct svc_rqst *rqstp,
rqstp->rq_arg.len = head->arg.len;
rqstp->rq_arg.buflen = head->arg.buflen;
+ /* Free the context */
+ svc_rdma_put_context(head, 0);
+
/* XXX: What should this be? */
rqstp->rq_prot = IPPROTO_MAX;
- /*
- * Free the contexts we used to build the RDMA_READ. We have
- * to be careful here because the context list uses the same
- * next pointer used to chain the contexts associated with the
- * RDMA_READ
- */
- data->next = NULL; /* terminate circular list */
- do {
- data = head->next;
- svc_rdma_put_context(head, 0);
- head = data;
- } while (head != NULL);
-
ret = rqstp->rq_arg.head[0].iov_len
+ rqstp->rq_arg.page_len
+ rqstp->rq_arg.tail[0].iov_len;
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 4a79dfda146..34141eaf25a 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -352,13 +352,16 @@ static void sq_cq_reap(struct svcxprt_rdma *xprt)
case IB_WR_RDMA_READ:
if (test_bit(RDMACTXT_F_LAST_CTXT, &ctxt->flags)) {
+ struct svc_rdma_op_ctxt *read_hdr = ctxt->read_hdr;
+ BUG_ON(!read_hdr);
set_bit(XPT_DATA, &xprt->sc_xprt.xpt_flags);
spin_lock_bh(&xprt->sc_read_complete_lock);
- list_add_tail(&ctxt->dto_q,
+ list_add_tail(&read_hdr->dto_q,
&xprt->sc_read_complete_q);
spin_unlock_bh(&xprt->sc_read_complete_lock);
svc_xprt_enqueue(&xprt->sc_xprt);
}
+ svc_rdma_put_context(ctxt, 0);
break;
default: