#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
+#include <linux/mutex.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xprt.h>
static void __rpc_default_timer(struct rpc_task *task);
static void rpciod_killall(void);
-static void rpc_free(struct rpc_task *task);
-
static void rpc_async_schedule(void *);
/*
/*
* rpciod-related stuff
*/
-static DECLARE_MUTEX(rpciod_sema);
+static DEFINE_MUTEX(rpciod_mutex);
static unsigned int rpciod_users;
-static struct workqueue_struct *rpciod_workqueue;
+struct workqueue_struct *rpciod_workqueue;
/*
* Spinlock for other critical sections of code.
else
list_add_tail(&task->u.tk_wait.list, &queue->tasks[0]);
task->u.tk_wait.rpc_waitq = queue;
+ queue->qlen++;
rpc_set_queued(task);
dprintk("RPC: %4d added to queue %p \"%s\"\n",
__rpc_remove_wait_queue_priority(task);
else
list_del(&task->u.tk_wait.list);
+ queue->qlen--;
dprintk("RPC: %4d removed from queue %p \"%s\"\n",
task->tk_pid, queue, rpc_qname(queue));
}
*/
void rpc_wake_up(struct rpc_wait_queue *queue)
{
- struct rpc_task *task;
-
+ struct rpc_task *task, *next;
struct list_head *head;
+
spin_lock_bh(&queue->lock);
head = &queue->tasks[queue->maxpriority];
for (;;) {
- while (!list_empty(head)) {
- task = list_entry(head->next, struct rpc_task, u.tk_wait.list);
+ list_for_each_entry_safe(task, next, head, u.tk_wait.list)
__rpc_wake_up_task(task);
- }
if (head == &queue->tasks[0])
break;
head--;
*/
void rpc_wake_up_status(struct rpc_wait_queue *queue, int status)
{
+ struct rpc_task *task, *next;
struct list_head *head;
- struct rpc_task *task;
spin_lock_bh(&queue->lock);
head = &queue->tasks[queue->maxpriority];
for (;;) {
- while (!list_empty(head)) {
- task = list_entry(head->next, struct rpc_task, u.tk_wait.list);
+ list_for_each_entry_safe(task, next, head, u.tk_wait.list) {
task->tk_status = status;
__rpc_wake_up_task(task);
}
WARN_ON(RPC_ASSASSINATED(task));
/* Always release the RPC slot and buffer memory */
xprt_release(task);
- rpc_free(task);
}
}
}
__rpc_execute((struct rpc_task *)arg);
}
-/*
- * Allocate memory for RPC purposes.
+/**
+ * rpc_malloc - allocate an RPC buffer
+ * @task: RPC task that will use this buffer
+ * @size: requested byte size
*
* We try to ensure that some NFS reads and writes can always proceed
* by using a mempool when allocating 'small' buffers.
* In order to avoid memory starvation triggering more writebacks of
* NFS requests, we use GFP_NOFS rather than GFP_KERNEL.
*/
-void *
-rpc_malloc(struct rpc_task *task, size_t size)
+void * rpc_malloc(struct rpc_task *task, size_t size)
{
+ struct rpc_rqst *req = task->tk_rqstp;
gfp_t gfp;
if (task->tk_flags & RPC_TASK_SWAPPER)
gfp = GFP_NOFS;
if (size > RPC_BUFFER_MAXSIZE) {
- task->tk_buffer = kmalloc(size, gfp);
- if (task->tk_buffer)
- task->tk_bufsize = size;
+ req->rq_buffer = kmalloc(size, gfp);
+ if (req->rq_buffer)
+ req->rq_bufsize = size;
} else {
- task->tk_buffer = mempool_alloc(rpc_buffer_mempool, gfp);
- if (task->tk_buffer)
- task->tk_bufsize = RPC_BUFFER_MAXSIZE;
+ req->rq_buffer = mempool_alloc(rpc_buffer_mempool, gfp);
+ if (req->rq_buffer)
+ req->rq_bufsize = RPC_BUFFER_MAXSIZE;
}
- return task->tk_buffer;
+ return req->rq_buffer;
}
-static void
-rpc_free(struct rpc_task *task)
+/**
+ * rpc_free - free buffer allocated via rpc_malloc
+ * @task: RPC task with a buffer to be freed
+ *
+ */
+void rpc_free(struct rpc_task *task)
{
- if (task->tk_buffer) {
- if (task->tk_bufsize == RPC_BUFFER_MAXSIZE)
- mempool_free(task->tk_buffer, rpc_buffer_mempool);
+ struct rpc_rqst *req = task->tk_rqstp;
+
+ if (req->rq_buffer) {
+ if (req->rq_bufsize == RPC_BUFFER_MAXSIZE)
+ mempool_free(req->rq_buffer, rpc_buffer_mempool);
else
- kfree(task->tk_buffer);
- task->tk_buffer = NULL;
- task->tk_bufsize = 0;
+ kfree(req->rq_buffer);
+ req->rq_buffer = NULL;
+ req->rq_bufsize = 0;
}
}
BUG_ON(task->tk_ops == NULL);
+ /* starting timestamp */
+ task->tk_start = jiffies;
+
dprintk("RPC: %4d new task procpid %d\n", task->tk_pid,
current->pid);
}
xprt_release(task);
if (task->tk_msg.rpc_cred)
rpcauth_unbindcred(task);
- rpc_free(task);
if (task->tk_client) {
rpc_release_client(task->tk_client);
task->tk_client = NULL;
/**
* rpc_run_task - Allocate a new RPC task, then run rpc_execute against it
- * @clnt - pointer to RPC client
- * @flags - RPC flags
- * @ops - RPC call ops
- * @data - user call data
+ * @clnt: pointer to RPC client
+ * @flags: RPC flags
+ * @ops: RPC call ops
+ * @data: user call data
*/
struct rpc_task *rpc_run_task(struct rpc_clnt *clnt, int flags,
const struct rpc_call_ops *ops,
{
struct rpc_task *task;
task = rpc_new_task(clnt, flags, ops, data);
- if (task == NULL)
+ if (task == NULL) {
+ if (ops->rpc_release != NULL)
+ ops->rpc_release(data);
return ERR_PTR(-ENOMEM);
+ }
atomic_inc(&task->tk_count);
rpc_execute(task);
return task;
/**
* rpc_find_parent - find the parent of a child task.
* @child: child task
+ * @parent: parent task
*
* Checks that the parent task is still sleeping on the
* queue 'childq'. If so returns a pointer to the parent.
struct workqueue_struct *wq;
int error = 0;
- down(&rpciod_sema);
+ mutex_lock(&rpciod_mutex);
dprintk("rpciod_up: users %d\n", rpciod_users);
rpciod_users++;
if (rpciod_workqueue)
rpciod_workqueue = wq;
error = 0;
out:
- up(&rpciod_sema);
+ mutex_unlock(&rpciod_mutex);
return error;
}
void
rpciod_down(void)
{
- down(&rpciod_sema);
+ mutex_lock(&rpciod_mutex);
dprintk("rpciod_down sema %d\n", rpciod_users);
if (rpciod_users) {
if (--rpciod_users)
destroy_workqueue(rpciod_workqueue);
rpciod_workqueue = NULL;
out:
- up(&rpciod_sema);
+ mutex_unlock(&rpciod_mutex);
}
#ifdef RPC_DEBUG
NULL, NULL);
if (!rpc_buffer_slabp)
goto err_nomem;
- rpc_task_mempool = mempool_create(RPC_TASK_POOLSIZE,
- mempool_alloc_slab,
- mempool_free_slab,
- rpc_task_slabp);
+ rpc_task_mempool = mempool_create_slab_pool(RPC_TASK_POOLSIZE,
+ rpc_task_slabp);
if (!rpc_task_mempool)
goto err_nomem;
- rpc_buffer_mempool = mempool_create(RPC_BUFFER_POOLSIZE,
- mempool_alloc_slab,
- mempool_free_slab,
- rpc_buffer_slabp);
+ rpc_buffer_mempool = mempool_create_slab_pool(RPC_BUFFER_POOLSIZE,
+ rpc_buffer_slabp);
if (!rpc_buffer_mempool)
goto err_nomem;
return 0;
projects / linux-2.6-omap-h63xx.git / blobdiff