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SUNRPC: Allow the rpc_release() callback to be run on another workqueue 

A lot of the work done by the rpc_release() callback is inappropriate for
rpciod as it will often involve things like starting a new rpc call in
order to clean up state after an interrupted NFSv4 open() call, or
calls to mntput(), etc.

This patch allows the caller of rpc_run_task() to specify that the
rpc_release callback should run on a different workqueue than the default
rpciod_workqueue.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2008-02-19 20:04:21 -05:00
parent 383ba71938
commit 32bfb5c0f4
2 changed files with 22 additions and 8 deletions
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1
include/linux/sunrpc/sched.h
View File

@ -123,6 +123,7 @@ struct rpc_task_setup {
const struct rpc_message *rpc_message;
const struct rpc_call_ops *callback_ops;
void *callback_data;
struct workqueue_struct *workqueue;
unsigned short flags;
signed char priority;
};

29
net/sunrpc/sched.c
View File

@ -326,7 +326,7 @@ static void rpc_make_runnable(struct rpc_task *task)
int status;
INIT_WORK(&task->u.tk_work, rpc_async_schedule);
status = queue_work(task->tk_workqueue, &task->u.tk_work);
status = queue_work(rpciod_workqueue, &task->u.tk_work);
if (status < 0) {
printk(KERN_WARNING "RPC: failed to add task to queue: error: %d!\n", status);
task->tk_status = status;
@ -832,7 +832,7 @@ static void rpc_init_task(struct rpc_task *task, const struct rpc_task_setup *ta
task->tk_owner = current->tgid;
/* Initialize workqueue for async tasks */
task->tk_workqueue = rpciod_workqueue;
task->tk_workqueue = task_setup_data->workqueue;
task->tk_client = task_setup_data->rpc_client;
if (task->tk_client != NULL) {
@ -868,7 +868,7 @@ rpc_alloc_task(void)
return (struct rpc_task *)mempool_alloc(rpc_task_mempool, GFP_NOFS);
}
static void rpc_free_task(struct rcu_head *rcu)
static void rpc_free_task_rcu(struct rcu_head *rcu)
{
struct rpc_task *task = container_of(rcu, struct rpc_task, u.tk_rcu);
dprintk("RPC: %5u freeing task\n", task->tk_pid);
@ -898,12 +898,23 @@ out:
return task;
}
void rpc_put_task(struct rpc_task *task)
static void rpc_free_task(struct rpc_task *task)
{
const struct rpc_call_ops *tk_ops = task->tk_ops;
void *calldata = task->tk_calldata;
if (task->tk_flags & RPC_TASK_DYNAMIC)
call_rcu_bh(&task->u.tk_rcu, rpc_free_task_rcu);
rpc_release_calldata(tk_ops, calldata);
}
static void rpc_async_release(struct work_struct *work)
{
rpc_free_task(container_of(work, struct rpc_task, u.tk_work));
}
void rpc_put_task(struct rpc_task *task)
{
if (!atomic_dec_and_test(&task->tk_count))
return;
/* Release resources */
@ -915,9 +926,11 @@ void rpc_put_task(struct rpc_task *task)
rpc_release_client(task->tk_client);
task->tk_client = NULL;
}
if (task->tk_flags & RPC_TASK_DYNAMIC)
call_rcu_bh(&task->u.tk_rcu, rpc_free_task);
rpc_release_calldata(tk_ops, calldata);
if (task->tk_workqueue != NULL) {
INIT_WORK(&task->u.tk_work, rpc_async_release);
queue_work(task->tk_workqueue, &task->u.tk_work);
} else
rpc_free_task(task);
}
EXPORT_SYMBOL_GPL(rpc_put_task);