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-rw-r--r--net/sunrpc/backchannel_rqst.c4
-rw-r--r--net/sunrpc/clnt.c8
-rw-r--r--net/sunrpc/svcsock.c6
-rw-r--r--net/sunrpc/xprt.c55
-rw-r--r--net/sunrpc/xprtrdma/rpc_rdma.c8
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_backchannel.c7
-rw-r--r--net/sunrpc/xprtsock.c82
7 files changed, 116 insertions, 54 deletions
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c
index ac701c28f44f..c2c68a15b59d 100644
--- a/net/sunrpc/backchannel_rqst.c
+++ b/net/sunrpc/backchannel_rqst.c
@@ -171,10 +171,10 @@ int xprt_setup_bc(struct rpc_xprt *xprt, unsigned int min_reqs)
/*
* Add the temporary list to the backchannel preallocation list
*/
- spin_lock_bh(&xprt->bc_pa_lock);
+ spin_lock(&xprt->bc_pa_lock);
list_splice(&tmp_list, &xprt->bc_pa_list);
xprt_inc_alloc_count(xprt, min_reqs);
- spin_unlock_bh(&xprt->bc_pa_lock);
+ spin_unlock(&xprt->bc_pa_lock);
dprintk("RPC: setup backchannel transport done\n");
return 0;
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 2e49d1f892b7..69a9e5953744 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1903,6 +1903,14 @@ call_connect_status(struct rpc_task *task)
task->tk_status = 0;
switch (status) {
case -ECONNREFUSED:
+ /* A positive refusal suggests a rebind is needed. */
+ if (RPC_IS_SOFTCONN(task))
+ break;
+ if (clnt->cl_autobind) {
+ rpc_force_rebind(clnt);
+ task->tk_action = call_bind;
+ return;
+ }
case -ECONNRESET:
case -ECONNABORTED:
case -ENETUNREACH:
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 2b720fa35c4f..272063ca81e8 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -1001,7 +1001,7 @@ static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp)
if (!bc_xprt)
return -EAGAIN;
- spin_lock_bh(&bc_xprt->transport_lock);
+ spin_lock(&bc_xprt->recv_lock);
req = xprt_lookup_rqst(bc_xprt, xid);
if (!req)
goto unlock_notfound;
@@ -1019,7 +1019,7 @@ static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp)
memcpy(dst->iov_base, src->iov_base, src->iov_len);
xprt_complete_rqst(req->rq_task, rqstp->rq_arg.len);
rqstp->rq_arg.len = 0;
- spin_unlock_bh(&bc_xprt->transport_lock);
+ spin_unlock(&bc_xprt->recv_lock);
return 0;
unlock_notfound:
printk(KERN_NOTICE
@@ -1028,7 +1028,7 @@ unlock_notfound:
__func__, ntohl(calldir),
bc_xprt, ntohl(xid));
unlock_eagain:
- spin_unlock_bh(&bc_xprt->transport_lock);
+ spin_unlock(&bc_xprt->recv_lock);
return -EAGAIN;
}
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 4654a9934269..2af189c5ac3e 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -844,6 +844,48 @@ struct rpc_rqst *xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 xid)
}
EXPORT_SYMBOL_GPL(xprt_lookup_rqst);
+/**
+ * xprt_pin_rqst - Pin a request on the transport receive list
+ * @req: Request to pin
+ *
+ * Caller must ensure this is atomic with the call to xprt_lookup_rqst()
+ * so should be holding the xprt transport lock.
+ */
+void xprt_pin_rqst(struct rpc_rqst *req)
+{
+ set_bit(RPC_TASK_MSG_RECV, &req->rq_task->tk_runstate);
+}
+
+/**
+ * xprt_unpin_rqst - Unpin a request on the transport receive list
+ * @req: Request to pin
+ *
+ * Caller should be holding the xprt transport lock.
+ */
+void xprt_unpin_rqst(struct rpc_rqst *req)
+{
+ struct rpc_task *task = req->rq_task;
+
+ clear_bit(RPC_TASK_MSG_RECV, &task->tk_runstate);
+ if (test_bit(RPC_TASK_MSG_RECV_WAIT, &task->tk_runstate))
+ wake_up_bit(&task->tk_runstate, RPC_TASK_MSG_RECV);
+}
+
+static void xprt_wait_on_pinned_rqst(struct rpc_rqst *req)
+__must_hold(&req->rq_xprt->recv_lock)
+{
+ struct rpc_task *task = req->rq_task;
+
+ if (task && test_bit(RPC_TASK_MSG_RECV, &task->tk_runstate)) {
+ spin_unlock(&req->rq_xprt->recv_lock);
+ set_bit(RPC_TASK_MSG_RECV_WAIT, &task->tk_runstate);
+ wait_on_bit(&task->tk_runstate, RPC_TASK_MSG_RECV,
+ TASK_UNINTERRUPTIBLE);
+ clear_bit(RPC_TASK_MSG_RECV_WAIT, &task->tk_runstate);
+ spin_lock(&req->rq_xprt->recv_lock);
+ }
+}
+
static void xprt_update_rtt(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
@@ -966,13 +1008,13 @@ void xprt_transmit(struct rpc_task *task)
/*
* Add to the list only if we're expecting a reply
*/
- spin_lock_bh(&xprt->transport_lock);
/* Update the softirq receive buffer */
memcpy(&req->rq_private_buf, &req->rq_rcv_buf,
sizeof(req->rq_private_buf));
/* Add request to the receive list */
+ spin_lock(&xprt->recv_lock);
list_add_tail(&req->rq_list, &xprt->recv);
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
xprt_reset_majortimeo(req);
/* Turn off autodisconnect */
del_singleshot_timer_sync(&xprt->timer);
@@ -1287,12 +1329,16 @@ void xprt_release(struct rpc_task *task)
task->tk_ops->rpc_count_stats(task, task->tk_calldata);
else if (task->tk_client)
rpc_count_iostats(task, task->tk_client->cl_metrics);
+ spin_lock(&xprt->recv_lock);
+ if (!list_empty(&req->rq_list)) {
+ list_del(&req->rq_list);
+ xprt_wait_on_pinned_rqst(req);
+ }
+ spin_unlock(&xprt->recv_lock);
spin_lock_bh(&xprt->transport_lock);
xprt->ops->release_xprt(xprt, task);
if (xprt->ops->release_request)
xprt->ops->release_request(task);
- if (!list_empty(&req->rq_list))
- list_del(&req->rq_list);
xprt->last_used = jiffies;
xprt_schedule_autodisconnect(xprt);
spin_unlock_bh(&xprt->transport_lock);
@@ -1318,6 +1364,7 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
spin_lock_init(&xprt->transport_lock);
spin_lock_init(&xprt->reserve_lock);
+ spin_lock_init(&xprt->recv_lock);
INIT_LIST_HEAD(&xprt->free);
INIT_LIST_HEAD(&xprt->recv);
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index 84584caaa7e9..7fec4039cd15 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -1292,7 +1292,7 @@ rpcrdma_reply_handler(struct work_struct *work)
* RPC completion while holding the transport lock to ensure
* the rep, rqst, and rq_task pointers remain stable.
*/
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
rqst = xprt_lookup_rqst(xprt, xid);
if (!rqst)
goto out_norqst;
@@ -1323,7 +1323,7 @@ out:
xprt_release_rqst_cong(rqst->rq_task);
xprt_complete_rqst(rqst->rq_task, status);
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
dprintk("RPC: %s: xprt_complete_rqst(0x%p, 0x%p, %d)\n",
__func__, xprt, rqst, status);
return;
@@ -1354,12 +1354,12 @@ out_badheader:
status = -EIO;
goto out;
-/* The req was still available, but by the time the transport_lock
+/* The req was still available, but by the time the recv_lock
* was acquired, the rqst and task had been released. Thus the RPC
* has already been terminated.
*/
out_norqst:
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
rpcrdma_buffer_put(req);
dprintk("RPC: %s: race, no rqst left for req %p\n",
__func__, req);
diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
index ca41e28d2b36..ec37ad83b068 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c
@@ -52,7 +52,7 @@ int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt, __be32 *rdma_resp,
if (src->iov_len < 24)
goto out_shortreply;
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
req = xprt_lookup_rqst(xprt, xid);
if (!req)
goto out_notfound;
@@ -69,17 +69,20 @@ int svc_rdma_handle_bc_reply(struct rpc_xprt *xprt, __be32 *rdma_resp,
else if (credits > r_xprt->rx_buf.rb_bc_max_requests)
credits = r_xprt->rx_buf.rb_bc_max_requests;
+ spin_lock_bh(&xprt->transport_lock);
cwnd = xprt->cwnd;
xprt->cwnd = credits << RPC_CWNDSHIFT;
if (xprt->cwnd > cwnd)
xprt_release_rqst_cong(req->rq_task);
+ spin_unlock_bh(&xprt->transport_lock);
+
ret = 0;
xprt_complete_rqst(req->rq_task, rcvbuf->len);
rcvbuf->len = 0;
out_unlock:
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
out:
return ret;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 5cf17001f0e2..9b5de31aa429 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -969,10 +969,12 @@ static void xs_local_data_read_skb(struct rpc_xprt *xprt,
return;
/* Look up and lock the request corresponding to the given XID */
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
rovr = xprt_lookup_rqst(xprt, *xp);
if (!rovr)
goto out_unlock;
+ xprt_pin_rqst(rovr);
+ spin_unlock(&xprt->recv_lock);
task = rovr->rq_task;
copied = rovr->rq_private_buf.buflen;
@@ -981,13 +983,16 @@ static void xs_local_data_read_skb(struct rpc_xprt *xprt,
if (xs_local_copy_to_xdr(&rovr->rq_private_buf, skb)) {
dprintk("RPC: sk_buff copy failed\n");
- goto out_unlock;
+ spin_lock(&xprt->recv_lock);
+ goto out_unpin;
}
+ spin_lock(&xprt->recv_lock);
xprt_complete_rqst(task, copied);
-
+out_unpin:
+ xprt_unpin_rqst(rovr);
out_unlock:
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
}
static void xs_local_data_receive(struct sock_xprt *transport)
@@ -1050,10 +1055,12 @@ static void xs_udp_data_read_skb(struct rpc_xprt *xprt,
return;
/* Look up and lock the request corresponding to the given XID */
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
rovr = xprt_lookup_rqst(xprt, *xp);
if (!rovr)
goto out_unlock;
+ xprt_pin_rqst(rovr);
+ spin_unlock(&xprt->recv_lock);
task = rovr->rq_task;
if ((copied = rovr->rq_private_buf.buflen) > repsize)
@@ -1062,16 +1069,21 @@ static void xs_udp_data_read_skb(struct rpc_xprt *xprt,
/* Suck it into the iovec, verify checksum if not done by hw. */
if (csum_partial_copy_to_xdr(&rovr->rq_private_buf, skb)) {
__UDPX_INC_STATS(sk, UDP_MIB_INERRORS);
- goto out_unlock;
+ spin_lock(&xprt->recv_lock);
+ goto out_unpin;
}
__UDPX_INC_STATS(sk, UDP_MIB_INDATAGRAMS);
+ spin_lock_bh(&xprt->transport_lock);
xprt_adjust_cwnd(xprt, task, copied);
+ spin_unlock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
xprt_complete_rqst(task, copied);
-
+out_unpin:
+ xprt_unpin_rqst(rovr);
out_unlock:
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
}
static void xs_udp_data_receive(struct sock_xprt *transport)
@@ -1277,25 +1289,12 @@ static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
}
len = desc->count;
- if (len > transport->tcp_reclen - transport->tcp_offset) {
- struct xdr_skb_reader my_desc;
-
- len = transport->tcp_reclen - transport->tcp_offset;
- memcpy(&my_desc, desc, sizeof(my_desc));
- my_desc.count = len;
- r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
- &my_desc, xdr_skb_read_bits);
- desc->count -= r;
- desc->offset += r;
- } else
- r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
+ if (len > transport->tcp_reclen - transport->tcp_offset)
+ desc->count = transport->tcp_reclen - transport->tcp_offset;
+ r = xdr_partial_copy_from_skb(rcvbuf, transport->tcp_copied,
desc, xdr_skb_read_bits);
- if (r > 0) {
- transport->tcp_copied += r;
- transport->tcp_offset += r;
- }
- if (r != len) {
+ if (desc->count) {
/* Error when copying to the receive buffer,
* usually because we weren't able to allocate
* additional buffer pages. All we can do now
@@ -1315,6 +1314,10 @@ static inline void xs_tcp_read_common(struct rpc_xprt *xprt,
return;
}
+ transport->tcp_copied += r;
+ transport->tcp_offset += r;
+ desc->count = len - r;
+
dprintk("RPC: XID %08x read %zd bytes\n",
ntohl(transport->tcp_xid), r);
dprintk("RPC: xprt = %p, tcp_copied = %lu, tcp_offset = %u, "
@@ -1343,21 +1346,24 @@ static inline int xs_tcp_read_reply(struct rpc_xprt *xprt,
dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid));
/* Find and lock the request corresponding to this xid */
- spin_lock_bh(&xprt->transport_lock);
+ spin_lock(&xprt->recv_lock);
req = xprt_lookup_rqst(xprt, transport->tcp_xid);
if (!req) {
dprintk("RPC: XID %08x request not found!\n",
ntohl(transport->tcp_xid));
- spin_unlock_bh(&xprt->transport_lock);
+ spin_unlock(&xprt->recv_lock);
return -1;
}
+ xprt_pin_rqst(req);
+ spin_unlock(&xprt->recv_lock);
xs_tcp_read_common(xprt, desc, req);
+ spin_lock(&xprt->recv_lock);
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_rqst(req->rq_task, transport->tcp_copied);
-
- spin_unlock_bh(&xprt->transport_lock);
+ xprt_unpin_rqst(req);
+ spin_unlock(&xprt->recv_lock);
return 0;
}
@@ -1376,11 +1382,9 @@ static int xs_tcp_read_callback(struct rpc_xprt *xprt,
container_of(xprt, struct sock_xprt, xprt);
struct rpc_rqst *req;
- /* Look up and lock the request corresponding to the given XID */
- spin_lock_bh(&xprt->transport_lock);
+ /* Look up the request corresponding to the given XID */
req = xprt_lookup_bc_request(xprt, transport->tcp_xid);
if (req == NULL) {
- spin_unlock_bh(&xprt->transport_lock);
printk(KERN_WARNING "Callback slot table overflowed\n");
xprt_force_disconnect(xprt);
return -1;
@@ -1391,7 +1395,6 @@ static int xs_tcp_read_callback(struct rpc_xprt *xprt,
if (!(transport->tcp_flags & TCP_RCV_COPY_DATA))
xprt_complete_bc_request(req, transport->tcp_copied);
- spin_unlock_bh(&xprt->transport_lock);
return 0;
}
@@ -1516,6 +1519,7 @@ static void xs_tcp_data_receive(struct sock_xprt *transport)
.arg.data = xprt,
};
unsigned long total = 0;
+ int loop;
int read = 0;
mutex_lock(&transport->recv_mutex);
@@ -1524,20 +1528,20 @@ static void xs_tcp_data_receive(struct sock_xprt *transport)
goto out;
/* We use rd_desc to pass struct xprt to xs_tcp_data_recv */
- for (;;) {
+ for (loop = 0; loop < 64; loop++) {
lock_sock(sk);
read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv);
if (read <= 0) {
clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state);
release_sock(sk);
- if (!test_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
- break;
- } else {
- release_sock(sk);
- total += read;
+ break;
}
+ release_sock(sk);
+ total += read;
rd_desc.count = 65536;
}
+ if (test_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
+ queue_work(xprtiod_workqueue, &transport->recv_worker);
out:
mutex_unlock(&transport->recv_mutex);
trace_xs_tcp_data_ready(xprt, read, total);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 16:52:41 +0000