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-rw-r--r--fs/nfs/inode.c10
-rw-r--r--include/linux/nfs_fs.h4
-rw-r--r--include/linux/sunrpc/xprt.h29
-rw-r--r--net/sunrpc/clnt.c2
-rw-r--r--net/sunrpc/xprt.c5
-rw-r--r--net/sunrpc/xprtsock.c68
6 files changed, 84 insertions, 34 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index b6a1ca508e6..062911e7ceb 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -369,8 +369,8 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned
case IPPROTO_TCP:
if (!to->to_initval)
to->to_initval = 60 * HZ;
- if (to->to_initval > RPC_MAX_TCP_TIMEOUT)
- to->to_initval = RPC_MAX_TCP_TIMEOUT;
+ if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
+ to->to_initval = NFS_MAX_TCP_TIMEOUT;
to->to_increment = to->to_initval;
to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
to->to_exponential = 0;
@@ -379,9 +379,9 @@ static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned
default:
if (!to->to_initval)
to->to_initval = 11 * HZ / 10;
- if (to->to_initval > RPC_MAX_UDP_TIMEOUT)
- to->to_initval = RPC_MAX_UDP_TIMEOUT;
- to->to_maxval = RPC_MAX_UDP_TIMEOUT;
+ if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
+ to->to_initval = NFS_MAX_UDP_TIMEOUT;
+ to->to_maxval = NFS_MAX_UDP_TIMEOUT;
to->to_exponential = 1;
break;
}
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 9a6047ff1b2..7bac2785c6e 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -41,6 +41,10 @@
#define NFS_MAX_FILE_IO_BUFFER_SIZE 32768
#define NFS_DEF_FILE_IO_BUFFER_SIZE 4096
+/* Default timeout values */
+#define NFS_MAX_UDP_TIMEOUT (60*HZ)
+#define NFS_MAX_TCP_TIMEOUT (600*HZ)
+
/*
* superblock magic number for NFS
*/
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 9d9266cf8a3..2543adf1855 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -22,28 +22,6 @@ extern unsigned int xprt_tcp_slot_table_entries;
#define RPC_DEF_SLOT_TABLE (16U)
#define RPC_MAX_SLOT_TABLE (128U)
-/* Default timeout values */
-#define RPC_MAX_UDP_TIMEOUT (60*HZ)
-#define RPC_MAX_TCP_TIMEOUT (600*HZ)
-
-/*
- * Wait duration for an RPC TCP connection to be established. Solaris
- * NFS over TCP uses 60 seconds, for example, which is in line with how
- * long a server takes to reboot.
- */
-#define RPC_CONNECT_TIMEOUT (60*HZ)
-
-/*
- * Delay an arbitrary number of seconds before attempting to reconnect
- * after an error.
- */
-#define RPC_REESTABLISH_TIMEOUT (15*HZ)
-
-/*
- * RPC transport idle timeout.
- */
-#define RPC_IDLE_DISCONNECT_TIMEOUT (5*60*HZ)
-
/*
* RPC call and reply header size as number of 32bit words (verifier
* size computed separately)
@@ -182,14 +160,19 @@ struct rpc_xprt {
/*
* Connection of transports
*/
+ unsigned long connect_timeout,
+ bind_timeout,
+ reestablish_timeout;
struct work_struct connect_worker;
unsigned short port;
+
/*
* Disconnection of idle transports
*/
struct work_struct task_cleanup;
struct timer_list timer;
- unsigned long last_used;
+ unsigned long last_used,
+ idle_timeout;
/*
* Send stuff
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index cc1b773a79d..24b44e73f39 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -740,7 +740,7 @@ call_bind(struct rpc_task *task)
task->tk_action = call_connect;
if (!clnt->cl_port) {
task->tk_action = call_bind_status;
- task->tk_timeout = RPC_CONNECT_TIMEOUT;
+ task->tk_timeout = task->tk_xprt->bind_timeout;
rpc_getport(task, clnt);
}
}
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 0458319a1bd..215be0d0ef6 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -551,7 +551,7 @@ void xprt_connect(struct rpc_task *task)
if (task->tk_rqstp)
task->tk_rqstp->rq_bytes_sent = 0;
- task->tk_timeout = RPC_CONNECT_TIMEOUT;
+ task->tk_timeout = xprt->connect_timeout;
rpc_sleep_on(&xprt->pending, task, xprt_connect_status, NULL);
xprt->ops->connect(task);
}
@@ -763,7 +763,6 @@ void xprt_transmit(struct rpc_task *task)
switch (status) {
case -ECONNREFUSED:
- task->tk_timeout = RPC_REESTABLISH_TIMEOUT;
rpc_sleep_on(&xprt->sending, task, NULL, NULL);
case -EAGAIN:
case -ENOTCONN:
@@ -857,7 +856,7 @@ void xprt_release(struct rpc_task *task)
xprt->last_used = jiffies;
if (list_empty(&xprt->recv) && !xprt->shutdown)
mod_timer(&xprt->timer,
- xprt->last_used + RPC_IDLE_DISCONNECT_TIMEOUT);
+ xprt->last_used + xprt->idle_timeout);
spin_unlock_bh(&xprt->transport_lock);
task->tk_rqstp = NULL;
memset(req, 0, sizeof(*req)); /* mark unused */
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 88ac71fcd33..06c2d95484e 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -41,6 +41,50 @@
*/
#define XS_SENDMSG_RETRY (10U)
+/*
+ * Time out for an RPC UDP socket connect. UDP socket connects are
+ * synchronous, but we set a timeout anyway in case of resource
+ * exhaustion on the local host.
+ */
+#define XS_UDP_CONN_TO (5U * HZ)
+
+/*
+ * Wait duration for an RPC TCP connection to be established. Solaris
+ * NFS over TCP uses 60 seconds, for example, which is in line with how
+ * long a server takes to reboot.
+ */
+#define XS_TCP_CONN_TO (60U * HZ)
+
+/*
+ * Wait duration for a reply from the RPC portmapper.
+ */
+#define XS_BIND_TO (60U * HZ)
+
+/*
+ * Delay if a UDP socket connect error occurs. This is most likely some
+ * kind of resource problem on the local host.
+ */
+#define XS_UDP_REEST_TO (2U * HZ)
+
+/*
+ * The reestablish timeout allows clients to delay for a bit before attempting
+ * to reconnect to a server that just dropped our connection.
+ *
+ * We implement an exponential backoff when trying to reestablish a TCP
+ * transport connection with the server. Some servers like to drop a TCP
+ * connection when they are overworked, so we start with a short timeout and
+ * increase over time if the server is down or not responding.
+ */
+#define XS_TCP_INIT_REEST_TO (3U * HZ)
+#define XS_TCP_MAX_REEST_TO (5U * 60 * HZ)
+
+/*
+ * TCP idle timeout; client drops the transport socket if it is idle
+ * for this long. Note that we also timeout UDP sockets to prevent
+ * holding port numbers when there is no RPC traffic.
+ */
+#define XS_IDLE_DISC_TO (5U * 60 * HZ)
+
#ifdef RPC_DEBUG
# undef RPC_DEBUG_DATA
# define RPCDBG_FACILITY RPCDBG_TRANS
@@ -739,6 +783,7 @@ static void xs_tcp_state_change(struct sock *sk)
xprt->tcp_reclen = 0;
xprt->tcp_copied = 0;
xprt->tcp_flags = XPRT_COPY_RECM | XPRT_COPY_XID;
+ xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
xprt_wake_pending_tasks(xprt, 0);
}
spin_unlock_bh(&xprt->transport_lock);
@@ -1066,6 +1111,13 @@ out_clear:
* @task: address of RPC task that manages state of connect request
*
* TCP: If the remote end dropped the connection, delay reconnecting.
+ *
+ * UDP socket connects are synchronous, but we use a work queue anyway
+ * to guarantee that even unprivileged user processes can set up a
+ * socket on a privileged port.
+ *
+ * If a UDP socket connect fails, the delay behavior here prevents
+ * retry floods (hard mounts).
*/
static void xs_connect(struct rpc_task *task)
{
@@ -1075,9 +1127,13 @@ static void xs_connect(struct rpc_task *task)
return;
if (xprt->sock != NULL) {
- dprintk("RPC: xs_connect delayed xprt %p\n", xprt);
+ dprintk("RPC: xs_connect delayed xprt %p for %lu seconds\n",
+ xprt, xprt->reestablish_timeout / HZ);
schedule_delayed_work(&xprt->connect_worker,
- RPC_REESTABLISH_TIMEOUT);
+ xprt->reestablish_timeout);
+ xprt->reestablish_timeout <<= 1;
+ if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO)
+ xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO;
} else {
dprintk("RPC: xs_connect scheduled xprt %p\n", xprt);
schedule_work(&xprt->connect_worker);
@@ -1139,6 +1195,10 @@ int xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to)
xprt->max_payload = (1U << 16) - (MAX_HEADER << 3);
INIT_WORK(&xprt->connect_worker, xs_udp_connect_worker, xprt);
+ xprt->bind_timeout = XS_BIND_TO;
+ xprt->connect_timeout = XS_UDP_CONN_TO;
+ xprt->reestablish_timeout = XS_UDP_REEST_TO;
+ xprt->idle_timeout = XS_IDLE_DISC_TO;
xprt->ops = &xs_udp_ops;
@@ -1176,6 +1236,10 @@ int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to)
xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
INIT_WORK(&xprt->connect_worker, xs_tcp_connect_worker, xprt);
+ xprt->bind_timeout = XS_BIND_TO;
+ xprt->connect_timeout = XS_TCP_CONN_TO;
+ xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
+ xprt->idle_timeout = XS_IDLE_DISC_TO;
xprt->ops = &xs_tcp_ops;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 18:28:09 +0000