From 58f9612c6ea858f532021a0ce42ec53cb0a493b3 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Sat, 31 Jul 2010 14:29:08 -0400
Subject: [PATCH] SUNRPC: Move remaining RPC client related task initialisation
into clnt.c
Now that rpc_run_task() is the sole entry point for RPC calls, we can move
the remaining rpc_client-related initialisation of struct rpc_task from
sched.c into clnt.c.
Also move rpc_killall_tasks() into the same file, since that too is
relative to the rpc_clnt.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
include/linux/sunrpc/clnt.h | 1 +
net/sunrpc/clnt.c | 84 +++++++++++++++++++++++++++++++++++++
net/sunrpc/sched.c | 77 ++--------------------------------
3 files changed, 89 insertions(+), 73 deletions(-)
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index debe75532199..569dc722a600 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -131,6 +131,7 @@ struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
void rpc_shutdown_client(struct rpc_clnt *);
void rpc_release_client(struct rpc_clnt *);
+void rpc_task_release_client(struct rpc_task *);
int rpcb_register(u32, u32, int, unsigned short);
int rpcb_v4_register(const u32 program, const u32 version,
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 234c40c15f69..3647c81fd689 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -413,6 +413,35 @@ out_no_clnt:
}
EXPORT_SYMBOL_GPL(rpc_clone_client);
+/*
+ * Kill all tasks for the given client.
+ * XXX: kill their descendants as well?
+ */
+void rpc_killall_tasks(struct rpc_clnt *clnt)
+{
+ struct rpc_task *rovr;
+
+
+ if (list_empty(&clnt->cl_tasks))
+ return;
+ dprintk("RPC: killing all tasks for client %p\n", clnt);
+ /*
+ * Spin lock all_tasks to prevent changes...
+ */
+ spin_lock(&clnt->cl_lock);
+ list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) {
+ if (!RPC_IS_ACTIVATED(rovr))
+ continue;
+ if (!(rovr->tk_flags & RPC_TASK_KILLED)) {
+ rovr->tk_flags |= RPC_TASK_KILLED;
+ rpc_exit(rovr, -EIO);
+ rpc_wake_up_queued_task(rovr->tk_waitqueue, rovr);
+ }
+ }
+ spin_unlock(&clnt->cl_lock);
+}
+EXPORT_SYMBOL_GPL(rpc_killall_tasks);
+
/*
* Properly shut down an RPC client, terminating all outstanding
* requests.
@@ -538,6 +567,49 @@ out:
}
EXPORT_SYMBOL_GPL(rpc_bind_new_program);
+void rpc_task_release_client(struct rpc_task *task)
+{
+ struct rpc_clnt *clnt = task->tk_client;
+
+ if (clnt != NULL) {
+ /* Remove from client task list */
+ spin_lock(&clnt->cl_lock);
+ list_del(&task->tk_task);
+ spin_unlock(&clnt->cl_lock);
+ task->tk_client = NULL;
+
+ rpc_release_client(clnt);
+ }
+}
+
+static
+void rpc_task_set_client(struct rpc_task *task, struct rpc_clnt *clnt)
+{
+ if (clnt != NULL) {
+ rpc_task_release_client(task);
+ task->tk_client = clnt;
+ kref_get(&clnt->cl_kref);
+ if (clnt->cl_softrtry)
+ task->tk_flags |= RPC_TASK_SOFT;
+ /* Add to the client's list of all tasks */
+ spin_lock(&clnt->cl_lock);
+ list_add_tail(&task->tk_task, &clnt->cl_tasks);
+ spin_unlock(&clnt->cl_lock);
+ }
+}
+
+static void
+rpc_task_set_rpc_message(struct rpc_task *task, const struct rpc_message *msg)
+{
+ if (msg != NULL) {
+ task->tk_msg.rpc_proc = msg->rpc_proc;
+ task->tk_msg.rpc_argp = msg->rpc_argp;
+ task->tk_msg.rpc_resp = msg->rpc_resp;
+ /* Bind the user cred */
+ rpcauth_bindcred(task, msg->rpc_cred, task->tk_flags);
+ }
+}
+
/*
* Default callback for async RPC calls
*/
@@ -562,6 +634,18 @@ struct rpc_task *rpc_run_task(const struct rpc_task_setup *task_setup_data)
if (IS_ERR(task))
goto out;
+ rpc_task_set_client(task, task_setup_data->rpc_client);
+ rpc_task_set_rpc_message(task, task_setup_data->rpc_message);
+
+ if (task->tk_status != 0) {
+ int ret = task->tk_status;
+ rpc_put_task(task);
+ return ERR_PTR(ret);
+ }
+
+ if (task->tk_action == NULL)
+ rpc_call_start(task);
+
atomic_inc(&task->tk_count);
rpc_execute(task);
out:
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 37452762af70..a42296db2ecd 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -246,17 +246,8 @@ static inline void rpc_task_set_debuginfo(struct rpc_task *task)
static void rpc_set_active(struct rpc_task *task)
{
- struct rpc_clnt *clnt;
- if (test_and_set_bit(RPC_TASK_ACTIVE, &task->tk_runstate) != 0)
- return;
rpc_task_set_debuginfo(task);
- /* Add to global list of all tasks */
- clnt = task->tk_client;
- if (clnt != NULL) {
- spin_lock(&clnt->cl_lock);
- list_add_tail(&task->tk_task, &clnt->cl_tasks);
- spin_unlock(&clnt->cl_lock);
- }
+ set_bit(RPC_TASK_ACTIVE, &task->tk_runstate);
}
/*
@@ -319,11 +310,6 @@ static void __rpc_sleep_on(struct rpc_wait_queue *q, struct rpc_task *task,
dprintk("RPC: %5u sleep_on(queue \"%s\" time %lu)\n",
task->tk_pid, rpc_qname(q), jiffies);
- if (!RPC_IS_ASYNC(task) && !RPC_IS_ACTIVATED(task)) {
- printk(KERN_ERR "RPC: Inactive synchronous task put to sleep!\n");
- return;
- }
-
__rpc_add_wait_queue(q, task);
BUG_ON(task->tk_callback != NULL);
@@ -334,8 +320,8 @@ static void __rpc_sleep_on(struct rpc_wait_queue *q, struct rpc_task *task,
void rpc_sleep_on(struct rpc_wait_queue *q, struct rpc_task *task,
rpc_action action)
{
- /* Mark the task as being activated if so needed */
- rpc_set_active(task);
+ /* We shouldn't ever put an inactive task to sleep */
+ BUG_ON(!RPC_IS_ACTIVATED(task));
/*
* Protect the queue operations.
@@ -807,26 +793,9 @@ static void rpc_init_task(struct rpc_task *task, const struct rpc_task_setup *ta
/* Initialize workqueue for async tasks */
task->tk_workqueue = task_setup_data->workqueue;
- task->tk_client = task_setup_data->rpc_client;
- if (task->tk_client != NULL) {
- kref_get(&task->tk_client->cl_kref);
- if (task->tk_client->cl_softrtry)
- task->tk_flags |= RPC_TASK_SOFT;
- }
-
if (task->tk_ops->rpc_call_prepare != NULL)
task->tk_action = rpc_prepare_task;
- if (task_setup_data->rpc_message != NULL) {
- task->tk_msg.rpc_proc = task_setup_data->rpc_message->rpc_proc;
- task->tk_msg.rpc_argp = task_setup_data->rpc_message->rpc_argp;
- task->tk_msg.rpc_resp = task_setup_data->rpc_message->rpc_resp;
- /* Bind the user cred */
- rpcauth_bindcred(task, task_setup_data->rpc_message->rpc_cred, task_setup_data->flags);
- if (task->tk_action == NULL)
- rpc_call_start(task);
- }
-
/* starting timestamp */
task->tk_start = ktime_get();
@@ -896,10 +865,7 @@ void rpc_put_task(struct rpc_task *task)
xprt_release(task);
if (task->tk_msg.rpc_cred)
rpcauth_unbindcred(task);
- if (task->tk_client) {
- rpc_release_client(task->tk_client);
- task->tk_client = NULL;
- }
+ rpc_task_release_client(task);
if (task->tk_workqueue != NULL) {
INIT_WORK(&task->u.tk_work, rpc_async_release);
queue_work(task->tk_workqueue, &task->u.tk_work);
@@ -912,13 +878,6 @@ static void rpc_release_task(struct rpc_task *task)
{
dprintk("RPC: %5u release task\n", task->tk_pid);
- if (!list_empty(&task->tk_task)) {
- struct rpc_clnt *clnt = task->tk_client;
- /* Remove from client task list */
- spin_lock(&clnt->cl_lock);
- list_del(&task->tk_task);
- spin_unlock(&clnt->cl_lock);
- }
BUG_ON (RPC_IS_QUEUED(task));
/* Wake up anyone who is waiting for task completion */
@@ -927,34 +886,6 @@ static void rpc_release_task(struct rpc_task *task)
rpc_put_task(task);
}
-/*
- * Kill all tasks for the given client.
- * XXX: kill their descendants as well?
- */
-void rpc_killall_tasks(struct rpc_clnt *clnt)
-{
- struct rpc_task *rovr;
-
-
- if (list_empty(&clnt->cl_tasks))
- return;
- dprintk("RPC: killing all tasks for client %p\n", clnt);
- /*
- * Spin lock all_tasks to prevent changes...
- */
- spin_lock(&clnt->cl_lock);
- list_for_each_entry(rovr, &clnt->cl_tasks, tk_task) {
- if (! RPC_IS_ACTIVATED(rovr))
- continue;
- if (!(rovr->tk_flags & RPC_TASK_KILLED)) {
- rovr->tk_flags |= RPC_TASK_KILLED;
- rpc_exit(rovr, -EIO);
- }
- }
- spin_unlock(&clnt->cl_lock);
-}
-EXPORT_SYMBOL_GPL(rpc_killall_tasks);
-
int rpciod_up(void)
{
return try_module_get(THIS_MODULE) ? 0 : -EINVAL;