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authorChuck Lever <chuck.lever@oracle.com>2020-05-12 17:13:39 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2020-06-11 13:33:48 -0400
commit42aad0d7f9486b72155892c689bea2ff9793d8a8 (patch)
tree2ca7fdc8748df916d66591a27b3cf1ea5da57354 /net/sunrpc
parent911813d7a15221362d1655d246f3502c0f898c14 (diff)
downloadlwn-42aad0d7f9486b72155892c689bea2ff9793d8a8.tar.gz
lwn-42aad0d7f9486b72155892c689bea2ff9793d8a8.zip
SUNRPC: trace RPC client lifetime events
The "create" tracepoint records parts of the rpc_create arguments, and the shutdown tracepoint records when the rpc_clnt is about to signal pending tasks and destroy auths. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/clnt.c39
1 files changed, 15 insertions, 24 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 0e684d93c9b1..4614a6eebfe1 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -370,10 +370,6 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args,
const char *nodename = args->nodename;
int err;
- /* sanity check the name before trying to print it */
- dprintk("RPC: creating %s client for %s (xprt %p)\n",
- program->name, args->servername, xprt);
-
err = rpciod_up();
if (err)
goto out_no_rpciod;
@@ -436,6 +432,8 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args,
goto out_no_path;
if (parent)
atomic_inc(&parent->cl_count);
+
+ trace_rpc_clnt_new(clnt, xprt, program->name, args->servername);
return clnt;
out_no_path:
@@ -450,6 +448,7 @@ out_err:
out_no_rpciod:
xprt_switch_put(xps);
xprt_put(xprt);
+ trace_rpc_clnt_new_err(program->name, args->servername, err);
return ERR_PTR(err);
}
@@ -634,10 +633,8 @@ static struct rpc_clnt *__rpc_clone_client(struct rpc_create_args *args,
args->nodename = clnt->cl_nodename;
new = rpc_new_client(args, xps, xprt, clnt);
- if (IS_ERR(new)) {
- err = PTR_ERR(new);
- goto out_err;
- }
+ if (IS_ERR(new))
+ return new;
/* Turn off autobind on clones */
new->cl_autobind = 0;
@@ -650,7 +647,7 @@ static struct rpc_clnt *__rpc_clone_client(struct rpc_create_args *args,
return new;
out_err:
- dprintk("RPC: %s: returned error %d\n", __func__, err);
+ trace_rpc_clnt_clone_err(clnt, err);
return ERR_PTR(err);
}
@@ -723,11 +720,8 @@ int rpc_switch_client_transport(struct rpc_clnt *clnt,
int err;
xprt = xprt_create_transport(args);
- if (IS_ERR(xprt)) {
- dprintk("RPC: failed to create new xprt for clnt %p\n",
- clnt);
+ if (IS_ERR(xprt))
return PTR_ERR(xprt);
- }
xps = xprt_switch_alloc(xprt, GFP_KERNEL);
if (xps == NULL) {
@@ -767,7 +761,7 @@ int rpc_switch_client_transport(struct rpc_clnt *clnt,
rpc_release_client(parent);
xprt_switch_put(oldxps);
xprt_put(old);
- dprintk("RPC: replaced xprt for clnt %p\n", clnt);
+ trace_rpc_clnt_replace_xprt(clnt);
return 0;
out_revert:
@@ -777,7 +771,7 @@ out_revert:
rpc_client_register(clnt, pseudoflavor, NULL);
xprt_switch_put(xps);
xprt_put(xprt);
- dprintk("RPC: failed to switch xprt for clnt %p\n", clnt);
+ trace_rpc_clnt_replace_xprt_err(clnt);
return err;
}
EXPORT_SYMBOL_GPL(rpc_switch_client_transport);
@@ -844,10 +838,11 @@ void rpc_killall_tasks(struct rpc_clnt *clnt)
if (list_empty(&clnt->cl_tasks))
return;
- dprintk("RPC: killing all tasks for client %p\n", clnt);
+
/*
* Spin lock all_tasks to prevent changes...
*/
+ trace_rpc_clnt_killall(clnt);
spin_lock(&clnt->cl_lock);
list_for_each_entry(rovr, &clnt->cl_tasks, tk_task)
rpc_signal_task(rovr);
@@ -863,9 +858,7 @@ void rpc_shutdown_client(struct rpc_clnt *clnt)
{
might_sleep();
- dprintk_rcu("RPC: shutting down %s client for %s\n",
- clnt->cl_program->name,
- rcu_dereference(clnt->cl_xprt)->servername);
+ trace_rpc_clnt_shutdown(clnt);
while (!list_empty(&clnt->cl_tasks)) {
rpc_killall_tasks(clnt);
@@ -884,6 +877,8 @@ static void rpc_free_client_work(struct work_struct *work)
{
struct rpc_clnt *clnt = container_of(work, struct rpc_clnt, cl_work);
+ trace_rpc_clnt_free(clnt);
+
/* These might block on processes that might allocate memory,
* so they cannot be called in rpciod, so they are handled separately
* here.
@@ -901,9 +896,7 @@ rpc_free_client(struct rpc_clnt *clnt)
{
struct rpc_clnt *parent = NULL;
- dprintk_rcu("RPC: destroying %s client for %s\n",
- clnt->cl_program->name,
- rcu_dereference(clnt->cl_xprt)->servername);
+ trace_rpc_clnt_release(clnt);
if (clnt->cl_parent != clnt)
parent = clnt->cl_parent;
rpc_unregister_client(clnt);
@@ -945,8 +938,6 @@ rpc_free_auth(struct rpc_clnt *clnt)
void
rpc_release_client(struct rpc_clnt *clnt)
{
- dprintk("RPC: rpc_release_client(%p)\n", clnt);
-
do {
if (list_empty(&clnt->cl_tasks))
wake_up(&destroy_wait);