SUNRPC: Trace transport lifetime events
Refactor: Hoist create/destroy/disconnect tracepoints out of
xprtrdma and into the generic RPC client. Some benefits include:
- Enable tracing of xprt lifetime events for the socket transport
types
- Expose the different types of disconnect to help run down
issues with lingering connections
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 053de05..d5cc5db 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -663,6 +663,7 @@ static void xprt_autoclose(struct work_struct *work)
container_of(work, struct rpc_xprt, task_cleanup);
unsigned int pflags = memalloc_nofs_save();
+ trace_xprt_disconnect_auto(xprt);
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
xprt->ops->close(xprt);
xprt_release_write(xprt, NULL);
@@ -677,7 +678,7 @@ static void xprt_autoclose(struct work_struct *work)
*/
void xprt_disconnect_done(struct rpc_xprt *xprt)
{
- dprintk("RPC: disconnected transport %p\n", xprt);
+ trace_xprt_disconnect_done(xprt);
spin_lock(&xprt->transport_lock);
xprt_clear_connected(xprt);
xprt_clear_write_space_locked(xprt);
@@ -694,6 +695,8 @@ EXPORT_SYMBOL_GPL(xprt_disconnect_done);
*/
void xprt_force_disconnect(struct rpc_xprt *xprt)
{
+ trace_xprt_disconnect_force(xprt);
+
/* Don't race with the test_bit() in xprt_clear_locked() */
spin_lock(&xprt->transport_lock);
set_bit(XPRT_CLOSE_WAIT, &xprt->state);
@@ -832,8 +835,10 @@ void xprt_connect(struct rpc_task *task)
if (!xprt_lock_write(xprt, task))
return;
- if (test_and_clear_bit(XPRT_CLOSE_WAIT, &xprt->state))
+ if (test_and_clear_bit(XPRT_CLOSE_WAIT, &xprt->state)) {
+ trace_xprt_disconnect_cleanup(xprt);
xprt->ops->close(xprt);
+ }
if (!xprt_connected(xprt)) {
task->tk_rqstp->rq_connect_cookie = xprt->connect_cookie;
@@ -1903,11 +1908,8 @@ struct rpc_xprt *xprt_create_transport(struct xprt_create *args)
found:
xprt = t->setup(args);
- if (IS_ERR(xprt)) {
- dprintk("RPC: xprt_create_transport: failed, %ld\n",
- -PTR_ERR(xprt));
+ if (IS_ERR(xprt))
goto out;
- }
if (args->flags & XPRT_CREATE_NO_IDLE_TIMEOUT)
xprt->idle_timeout = 0;
INIT_WORK(&xprt->task_cleanup, xprt_autoclose);
@@ -1928,8 +1930,7 @@ struct rpc_xprt *xprt_create_transport(struct xprt_create *args)
rpc_xprt_debugfs_register(xprt);
- dprintk("RPC: created transport %p with %u slots\n", xprt,
- xprt->max_reqs);
+ trace_xprt_create(xprt);
out:
return xprt;
}
@@ -1939,6 +1940,8 @@ static void xprt_destroy_cb(struct work_struct *work)
struct rpc_xprt *xprt =
container_of(work, struct rpc_xprt, task_cleanup);
+ trace_xprt_destroy(xprt);
+
rpc_xprt_debugfs_unregister(xprt);
rpc_destroy_wait_queue(&xprt->binding);
rpc_destroy_wait_queue(&xprt->pending);
@@ -1963,8 +1966,6 @@ static void xprt_destroy_cb(struct work_struct *work)
*/
static void xprt_destroy(struct rpc_xprt *xprt)
{
- dprintk("RPC: destroying transport %p\n", xprt);
-
/*
* Exclude transport connect/disconnect handlers and autoclose
*/