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Date: Sat, 7 Mar 2020 01:15:39 +0300
From: Pavel Begunkov <asml.silence@...il.com>
To: Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] io-wq: remove duplicated cancel code
Deduplicate cancellation parts, as many of them looks the same, as do
e.g.
- io_wqe_cancel_cb_work() and io_wqe_cancel_work()
- io_wq_worker_cancel() and io_work_cancel()
Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
fs/io-wq.c | 136 ++++++++++-------------------------------------------
1 file changed, 24 insertions(+), 112 deletions(-)
diff --git a/fs/io-wq.c b/fs/io-wq.c
index eda36f997dea..0e7c6277afcb 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -855,14 +855,13 @@ void io_wq_cancel_all(struct io_wq *wq)
}
struct io_cb_cancel_data {
- struct io_wqe *wqe;
- work_cancel_fn *cancel;
- void *caller_data;
+ work_cancel_fn *fn;
+ void *data;
};
-static bool io_work_cancel(struct io_worker *worker, void *cancel_data)
+static bool io_wq_worker_cancel(struct io_worker *worker, void *data)
{
- struct io_cb_cancel_data *data = cancel_data;
+ struct io_cb_cancel_data *match = data;
unsigned long flags;
bool ret = false;
@@ -873,83 +872,7 @@ static bool io_work_cancel(struct io_worker *worker, void *cancel_data)
spin_lock_irqsave(&worker->lock, flags);
if (worker->cur_work &&
!(worker->cur_work->flags & IO_WQ_WORK_NO_CANCEL) &&
- data->cancel(worker->cur_work, data->caller_data)) {
- send_sig(SIGINT, worker->task, 1);
- ret = true;
- }
- spin_unlock_irqrestore(&worker->lock, flags);
-
- return ret;
-}
-
-static enum io_wq_cancel io_wqe_cancel_cb_work(struct io_wqe *wqe,
- work_cancel_fn *cancel,
- void *cancel_data)
-{
- struct io_cb_cancel_data data = {
- .wqe = wqe,
- .cancel = cancel,
- .caller_data = cancel_data,
- };
- struct io_wq_work_node *node, *prev;
- struct io_wq_work *work;
- unsigned long flags;
- bool found = false;
-
- spin_lock_irqsave(&wqe->lock, flags);
- wq_list_for_each(node, prev, &wqe->work_list) {
- work = container_of(node, struct io_wq_work, list);
-
- if (cancel(work, cancel_data)) {
- wq_node_del(&wqe->work_list, node, prev);
- found = true;
- break;
- }
- }
- spin_unlock_irqrestore(&wqe->lock, flags);
-
- if (found) {
- io_run_cancel(work, wqe);
- return IO_WQ_CANCEL_OK;
- }
-
- rcu_read_lock();
- found = io_wq_for_each_worker(wqe, io_work_cancel, &data);
- rcu_read_unlock();
- return found ? IO_WQ_CANCEL_RUNNING : IO_WQ_CANCEL_NOTFOUND;
-}
-
-enum io_wq_cancel io_wq_cancel_cb(struct io_wq *wq, work_cancel_fn *cancel,
- void *data)
-{
- enum io_wq_cancel ret = IO_WQ_CANCEL_NOTFOUND;
- int node;
-
- for_each_node(node) {
- struct io_wqe *wqe = wq->wqes[node];
-
- ret = io_wqe_cancel_cb_work(wqe, cancel, data);
- if (ret != IO_WQ_CANCEL_NOTFOUND)
- break;
- }
-
- return ret;
-}
-
-struct work_match {
- bool (*fn)(struct io_wq_work *, void *data);
- void *data;
-};
-
-static bool io_wq_worker_cancel(struct io_worker *worker, void *data)
-{
- struct work_match *match = data;
- unsigned long flags;
- bool ret = false;
-
- spin_lock_irqsave(&worker->lock, flags);
- if (match->fn(worker->cur_work, match->data) &&
- !(worker->cur_work->flags & IO_WQ_WORK_NO_CANCEL)) {
+ match->fn(worker->cur_work, match->data)) {
send_sig(SIGINT, worker->task, 1);
ret = true;
}
@@ -959,7 +882,7 @@ static bool io_wq_worker_cancel(struct io_worker *worker, void *data)
}
static enum io_wq_cancel io_wqe_cancel_work(struct io_wqe *wqe,
- struct work_match *match)
+ struct io_cb_cancel_data *match)
{
struct io_wq_work_node *node, *prev;
struct io_wq_work *work;
@@ -1000,22 +923,16 @@ static enum io_wq_cancel io_wqe_cancel_work(struct io_wqe *wqe,
return found ? IO_WQ_CANCEL_RUNNING : IO_WQ_CANCEL_NOTFOUND;
}
-static bool io_wq_work_match(struct io_wq_work *work, void *data)
-{
- return work == data;
-}
-
-enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork)
+enum io_wq_cancel io_wq_cancel_cb(struct io_wq *wq, work_cancel_fn *cancel,
+ void *data)
{
- struct work_match match = {
- .fn = io_wq_work_match,
- .data = cwork
+ struct io_cb_cancel_data match = {
+ .fn = cancel,
+ .data = data,
};
enum io_wq_cancel ret = IO_WQ_CANCEL_NOTFOUND;
int node;
- cwork->flags |= IO_WQ_WORK_CANCEL;
-
for_each_node(node) {
struct io_wqe *wqe = wq->wqes[node];
@@ -1027,33 +944,28 @@ enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork)
return ret;
}
+static bool io_wq_io_cb_cancel_data(struct io_wq_work *work, void *data)
+{
+ return work == data;
+}
+
+enum io_wq_cancel io_wq_cancel_work(struct io_wq *wq, struct io_wq_work *cwork)
+{
+ return io_wq_cancel_cb(wq, io_wq_io_cb_cancel_data, (void *)cwork);
+}
+
static bool io_wq_pid_match(struct io_wq_work *work, void *data)
{
pid_t pid = (pid_t) (unsigned long) data;
- if (work)
- return work->task_pid == pid;
- return false;
+ return work->task_pid == pid;
}
enum io_wq_cancel io_wq_cancel_pid(struct io_wq *wq, pid_t pid)
{
- struct work_match match = {
- .fn = io_wq_pid_match,
- .data = (void *) (unsigned long) pid
- };
- enum io_wq_cancel ret = IO_WQ_CANCEL_NOTFOUND;
- int node;
-
- for_each_node(node) {
- struct io_wqe *wqe = wq->wqes[node];
+ void *data = (void *) (unsigned long) pid;
- ret = io_wqe_cancel_work(wqe, &match);
- if (ret != IO_WQ_CANCEL_NOTFOUND)
- break;
- }
-
- return ret;
+ return io_wq_cancel_cb(wq, io_wq_pid_match, data);
}
struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data)
--
2.24.0
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