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Merge branch 'sunrpc'

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This commit is contained in:
Trond Myklebust 2016-07-24 17:08:31 -04:00
commit 7f94ed2495
7 changed files with 136 additions and 74 deletions
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5
include/linux/sunrpc/sched.h
View File

@ -230,6 +230,10 @@ void rpc_wake_up_queued_task(struct rpc_wait_queue *,
struct rpc_task *);
void rpc_wake_up(struct rpc_wait_queue *);
struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
struct rpc_task *rpc_wake_up_first_on_wq(struct workqueue_struct *wq,
struct rpc_wait_queue *,
bool (*)(struct rpc_task *, void *),
void *);
struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *,
bool (*)(struct rpc_task *, void *),
void *);
@ -247,6 +251,7 @@ void rpc_show_tasks(struct net *);
int rpc_init_mempool(void);
void rpc_destroy_mempool(void);
extern struct workqueue_struct *rpciod_workqueue;
extern struct workqueue_struct *xprtiod_workqueue;
void rpc_prepare_task(struct rpc_task *task);
static inline int rpc_wait_for_completion_task(struct rpc_task *task)

1
include/linux/sunrpc/xprtsock.h
View File

@ -80,6 +80,7 @@ struct sock_xprt {
#define TCP_RPC_REPLY (1UL << 6)
#define XPRT_SOCK_CONNECTING 1U
#define XPRT_SOCK_DATA_READY (2)
#endif /* __KERNEL__ */

2
net/sunrpc/clnt.c
View File

@ -2577,7 +2577,7 @@ static void rpc_cb_add_xprt_release(void *calldata)
kfree(data);
}
const static struct rpc_call_ops rpc_cb_add_xprt_call_ops = {
static const struct rpc_call_ops rpc_cb_add_xprt_call_ops = {
.rpc_call_done = rpc_cb_add_xprt_done,
.rpc_release = rpc_cb_add_xprt_release,
};

67
net/sunrpc/sched.c
View File

@ -54,7 +54,8 @@ static struct rpc_wait_queue delay_queue;
/*
* rpciod-related stuff
*/
struct workqueue_struct *rpciod_workqueue;
struct workqueue_struct *rpciod_workqueue __read_mostly;
struct workqueue_struct *xprtiod_workqueue __read_mostly;
/*
* Disable the timer for a given RPC task. Should be called with
@ -329,7 +330,8 @@ EXPORT_SYMBOL_GPL(__rpc_wait_for_completion_task);
* lockless RPC_IS_QUEUED() test) before we've had a chance to test
* the RPC_TASK_RUNNING flag.
*/
static void rpc_make_runnable(struct rpc_task *task)
static void rpc_make_runnable(struct workqueue_struct *wq,
struct rpc_task *task)
{
bool need_wakeup = !rpc_test_and_set_running(task);
@ -338,7 +340,7 @@ static void rpc_make_runnable(struct rpc_task *task)
return;
if (RPC_IS_ASYNC(task)) {
INIT_WORK(&task->u.tk_work, rpc_async_schedule);
queue_work(rpciod_workqueue, &task->u.tk_work);
queue_work(wq, &task->u.tk_work);
} else
wake_up_bit(&task->tk_runstate, RPC_TASK_QUEUED);
}
@ -407,13 +409,16 @@ void rpc_sleep_on_priority(struct rpc_wait_queue *q, struct rpc_task *task,
EXPORT_SYMBOL_GPL(rpc_sleep_on_priority);
/**
* __rpc_do_wake_up_task - wake up a single rpc_task
* __rpc_do_wake_up_task_on_wq - wake up a single rpc_task
* @wq: workqueue on which to run task
* @queue: wait queue
* @task: task to be woken up
*
* Caller must hold queue->lock, and have cleared the task queued flag.
*/
static void __rpc_do_wake_up_task(struct rpc_wait_queue *queue, struct rpc_task *task)
static void __rpc_do_wake_up_task_on_wq(struct workqueue_struct *wq,
struct rpc_wait_queue *queue,
struct rpc_task *task)
{
dprintk("RPC: %5u __rpc_wake_up_task (now %lu)\n",
task->tk_pid, jiffies);
@ -428,7 +433,7 @@ static void __rpc_do_wake_up_task(struct rpc_wait_queue *queue, struct rpc_task
__rpc_remove_wait_queue(queue, task);
rpc_make_runnable(task);
rpc_make_runnable(wq, task);
dprintk("RPC: __rpc_wake_up_task done\n");
}
@ -436,15 +441,24 @@ static void __rpc_do_wake_up_task(struct rpc_wait_queue *queue, struct rpc_task
/*
* Wake up a queued task while the queue lock is being held
*/
static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct rpc_task *task)
static void rpc_wake_up_task_on_wq_queue_locked(struct workqueue_struct *wq,
struct rpc_wait_queue *queue, struct rpc_task *task)
{
if (RPC_IS_QUEUED(task)) {
smp_rmb();
if (task->tk_waitqueue == queue)
__rpc_do_wake_up_task(queue, task);
__rpc_do_wake_up_task_on_wq(wq, queue, task);
}
}
/*
* Wake up a queued task while the queue lock is being held
*/
static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct rpc_task *task)
{
rpc_wake_up_task_on_wq_queue_locked(rpciod_workqueue, queue, task);
}
/*
* Wake up a task on a specific queue
*/
@ -518,7 +532,8 @@ static struct rpc_task *__rpc_find_next_queued(struct rpc_wait_queue *queue)
/*
* Wake up the first task on the wait queue.
*/
struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *queue,
struct rpc_task *rpc_wake_up_first_on_wq(struct workqueue_struct *wq,
struct rpc_wait_queue *queue,
bool (*func)(struct rpc_task *, void *), void *data)
{
struct rpc_task *task = NULL;
@ -529,7 +544,7 @@ struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *queue,
task = __rpc_find_next_queued(queue);
if (task != NULL) {
if (func(task, data))
rpc_wake_up_task_queue_locked(queue, task);
rpc_wake_up_task_on_wq_queue_locked(wq, queue, task);
else
task = NULL;
}
@ -537,6 +552,15 @@ struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *queue,
return task;
}
/*
* Wake up the first task on the wait queue.
*/
struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *queue,
bool (*func)(struct rpc_task *, void *), void *data)
{
return rpc_wake_up_first_on_wq(rpciod_workqueue, queue, func, data);
}
EXPORT_SYMBOL_GPL(rpc_wake_up_first);
static bool rpc_wake_up_next_func(struct rpc_task *task, void *data)
@ -814,7 +838,7 @@ void rpc_execute(struct rpc_task *task)
bool is_async = RPC_IS_ASYNC(task);
rpc_set_active(task);
rpc_make_runnable(task);
rpc_make_runnable(rpciod_workqueue, task);
if (!is_async)
__rpc_execute(task);
}
@ -1071,10 +1095,22 @@ static int rpciod_start(void)
* Create the rpciod thread and wait for it to start.
*/
dprintk("RPC: creating workqueue rpciod\n");
/* Note: highpri because network receive is latency sensitive */
wq = alloc_workqueue("rpciod", WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
wq = alloc_workqueue("rpciod", WQ_MEM_RECLAIM, 0);
if (!wq)
goto out_failed;
rpciod_workqueue = wq;
return rpciod_workqueue != NULL;
/* Note: highpri because network receive is latency sensitive */
wq = alloc_workqueue("xprtiod", WQ_MEM_RECLAIM | WQ_HIGHPRI, 0);
if (!wq)
goto free_rpciod;
xprtiod_workqueue = wq;
return 1;
free_rpciod:
wq = rpciod_workqueue;
rpciod_workqueue = NULL;
destroy_workqueue(wq);
out_failed:
return 0;
}
static void rpciod_stop(void)
@ -1088,6 +1124,9 @@ static void rpciod_stop(void)
wq = rpciod_workqueue;
rpciod_workqueue = NULL;
destroy_workqueue(wq);
wq = xprtiod_workqueue;
xprtiod_workqueue = NULL;
destroy_workqueue(wq);
}
void

14
net/sunrpc/xprt.c
View File

@ -220,7 +220,7 @@ static void xprt_clear_locked(struct rpc_xprt *xprt)
clear_bit(XPRT_LOCKED, &xprt->state);
smp_mb__after_atomic();
} else
queue_work(rpciod_workqueue, &xprt->task_cleanup);
queue_work(xprtiod_workqueue, &xprt->task_cleanup);
}
/*
@ -295,7 +295,8 @@ static void __xprt_lock_write_next(struct rpc_xprt *xprt)
if (test_and_set_bit(XPRT_LOCKED, &xprt->state))
return;
if (rpc_wake_up_first(&xprt->sending, __xprt_lock_write_func, xprt))
if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending,
__xprt_lock_write_func, xprt))
return;
xprt_clear_locked(xprt);
}
@ -324,7 +325,8 @@ static void __xprt_lock_write_next_cong(struct rpc_xprt *xprt)
return;
if (RPCXPRT_CONGESTED(xprt))
goto out_unlock;
if (rpc_wake_up_first(&xprt->sending, __xprt_lock_write_cong_func, xprt))
if (rpc_wake_up_first_on_wq(xprtiod_workqueue, &xprt->sending,
__xprt_lock_write_cong_func, xprt))
return;
out_unlock:
xprt_clear_locked(xprt);
@ -645,7 +647,7 @@ void xprt_force_disconnect(struct rpc_xprt *xprt)
set_bit(XPRT_CLOSE_WAIT, &xprt->state);
/* Try to schedule an autoclose RPC call */
if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0)
queue_work(rpciod_workqueue, &xprt->task_cleanup);
queue_work(xprtiod_workqueue, &xprt->task_cleanup);
xprt_wake_pending_tasks(xprt, -EAGAIN);
spin_unlock_bh(&xprt->transport_lock);
}
@ -672,7 +674,7 @@ void xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie)
set_bit(XPRT_CLOSE_WAIT, &xprt->state);
/* Try to schedule an autoclose RPC call */
if (test_and_set_bit(XPRT_LOCKED, &xprt->state) == 0)
queue_work(rpciod_workqueue, &xprt->task_cleanup);
queue_work(xprtiod_workqueue, &xprt->task_cleanup);
xprt_wake_pending_tasks(xprt, -EAGAIN);
out:
spin_unlock_bh(&xprt->transport_lock);
@ -689,7 +691,7 @@ xprt_init_autodisconnect(unsigned long data)
if (test_and_set_bit(XPRT_LOCKED, &xprt->state))
goto out_abort;
spin_unlock(&xprt->transport_lock);
queue_work(rpciod_workqueue, &xprt->task_cleanup);
queue_work(xprtiod_workqueue, &xprt->task_cleanup);
return;
out_abort:
spin_unlock(&xprt->transport_lock);

8
net/sunrpc/xprtmultipath.c
View File

@ -271,14 +271,12 @@ struct rpc_xprt *xprt_iter_next_entry_multiple(struct rpc_xprt_iter *xpi,
xprt_switch_find_xprt_t find_next)
{
struct rpc_xprt_switch *xps = rcu_dereference(xpi->xpi_xpswitch);
struct list_head *head;
if (xps == NULL)
return NULL;
head = &xps->xps_xprt_list;
if (xps->xps_nxprts < 2)
return xprt_switch_find_first_entry(head);
return xprt_switch_set_next_cursor(head, &xpi->xpi_cursor, find_next);
return xprt_switch_set_next_cursor(&xps->xps_xprt_list,
&xpi->xpi_cursor,
find_next);
}
static

113
net/sunrpc/xprtsock.c
View File

@ -642,6 +642,7 @@ static int xs_tcp_send_request(struct rpc_task *task)
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct xdr_buf *xdr = &req->rq_snd_buf;
bool zerocopy = true;
bool vm_wait = false;
int status;
int sent;
@ -677,15 +678,33 @@ static int xs_tcp_send_request(struct rpc_task *task)
return 0;
}
WARN_ON_ONCE(sent == 0 && status == 0);
if (status == -EAGAIN ) {
/*
* Return EAGAIN if we're sure we're hitting the
* socket send buffer limits.
*/
if (test_bit(SOCK_NOSPACE, &transport->sock->flags))
break;
/*
* Did we hit a memory allocation failure?
*/
if (sent == 0) {
status = -ENOBUFS;
if (vm_wait)
break;
/* Retry, knowing now that we're below the
* socket send buffer limit
*/
vm_wait = true;
}
continue;
}
if (status < 0)
break;
if (sent == 0) {
status = -EAGAIN;
break;
}
vm_wait = false;
}
if (status == -EAGAIN && sk_stream_is_writeable(transport->inet))
status = -ENOBUFS;
switch (status) {
case -ENOTSOCK:
@ -755,11 +774,19 @@ static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *s
sk->sk_error_report = transport->old_error_report;
}
static void xs_sock_reset_state_flags(struct rpc_xprt *xprt)
{
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state);
}
static void xs_sock_reset_connection_flags(struct rpc_xprt *xprt)
{
smp_mb__before_atomic();
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
xs_sock_reset_state_flags(xprt);
smp_mb__after_atomic();
}
@ -962,10 +989,13 @@ static void xs_local_data_receive(struct sock_xprt *transport)
goto out;
for (;;) {
skb = skb_recv_datagram(sk, 0, 1, &err);
if (skb == NULL)
if (skb != NULL) {
xs_local_data_read_skb(&transport->xprt, sk, skb);
skb_free_datagram(sk, skb);
continue;
}
if (!test_and_clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
break;
xs_local_data_read_skb(&transport->xprt, sk, skb);
skb_free_datagram(sk, skb);
}
out:
mutex_unlock(&transport->recv_mutex);
@ -1043,10 +1073,13 @@ static void xs_udp_data_receive(struct sock_xprt *transport)
goto out;
for (;;) {
skb = skb_recv_datagram(sk, 0, 1, &err);
if (skb == NULL)
if (skb != NULL) {
xs_udp_data_read_skb(&transport->xprt, sk, skb);
skb_free_datagram(sk, skb);
continue;
}
if (!test_and_clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
break;
xs_udp_data_read_skb(&transport->xprt, sk, skb);
skb_free_datagram(sk, skb);
}
out:
mutex_unlock(&transport->recv_mutex);
@ -1074,7 +1107,14 @@ static void xs_data_ready(struct sock *sk)
if (xprt != NULL) {
struct sock_xprt *transport = container_of(xprt,
struct sock_xprt, xprt);
queue_work(rpciod_workqueue, &transport->recv_worker);
transport->old_data_ready(sk);
/* Any data means we had a useful conversation, so
* then we don't need to delay the next reconnect
*/
if (xprt->reestablish_timeout)
xprt->reestablish_timeout = 0;
if (!test_and_set_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
queue_work(xprtiod_workqueue, &transport->recv_worker);
}
read_unlock_bh(&sk->sk_callback_lock);
}
@ -1474,10 +1514,15 @@ static void xs_tcp_data_receive(struct sock_xprt *transport)
for (;;) {
lock_sock(sk);
read = tcp_read_sock(sk, &rd_desc, xs_tcp_data_recv);
release_sock(sk);
if (read <= 0)
break;
total += read;
if (read <= 0) {
clear_bit(XPRT_SOCK_DATA_READY, &transport->sock_state);
release_sock(sk);
if (!test_bit(XPRT_SOCK_DATA_READY, &transport->sock_state))
break;
} else {
release_sock(sk);
total += read;
}
rd_desc.count = 65536;
}
out:
@ -1492,34 +1537,6 @@ static void xs_tcp_data_receive_workfn(struct work_struct *work)
xs_tcp_data_receive(transport);
}
/**
* xs_tcp_data_ready - "data ready" callback for TCP sockets
* @sk: socket with data to read
*
*/
static void xs_tcp_data_ready(struct sock *sk)
{
struct sock_xprt *transport;
struct rpc_xprt *xprt;
dprintk("RPC: xs_tcp_data_ready...\n");
read_lock_bh(&sk->sk_callback_lock);
if (!(xprt = xprt_from_sock(sk)))
goto out;
transport = container_of(xprt, struct sock_xprt, xprt);
/* Any data means we had a useful conversation, so
* the we don't need to delay the next reconnect
*/
if (xprt->reestablish_timeout)
xprt->reestablish_timeout = 0;
queue_work(rpciod_workqueue, &transport->recv_worker);
out:
read_unlock_bh(&sk->sk_callback_lock);
}
/**
* xs_tcp_state_change - callback to handle TCP socket state changes
* @sk: socket whose state has changed
@ -2241,7 +2258,7 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
xs_save_old_callbacks(transport, sk);
sk->sk_user_data = xprt;
sk->sk_data_ready = xs_tcp_data_ready;
sk->sk_data_ready = xs_data_ready;
sk->sk_state_change = xs_tcp_state_change;
sk->sk_write_space = xs_tcp_write_space;
sock_set_flag(sk, SOCK_FASYNC);
@ -2380,7 +2397,7 @@ static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task)
/* Start by resetting any existing state */
xs_reset_transport(transport);
queue_delayed_work(rpciod_workqueue,
queue_delayed_work(xprtiod_workqueue,
&transport->connect_worker,
xprt->reestablish_timeout);
xprt->reestablish_timeout <<= 1;
@ -2390,7 +2407,7 @@ static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task)
xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO;
} else {
dprintk("RPC: xs_connect scheduled xprt %p\n", xprt);
queue_delayed_work(rpciod_workqueue,
queue_delayed_work(xprtiod_workqueue,
&transport->connect_worker, 0);
}
}