From: Pavel Begunkov <asml.silence@gmail.com>
Date: Thu, 16 Jun 2022 09:22:11 +0000 (+0100)
Subject: io_uring: propagate locking state to poll cancel
X-Git-Tag: v6.6.17~6956^2~89
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5d7943d99df9326c7b02f773b2d6f09709c30594;p=platform%2Fkernel%2Flinux-rpi.git

io_uring: propagate locking state to poll cancel

Poll cancellation will be soon need to grab ->uring_lock inside, pass
the locking state, i.e. issue_flags, inside the cancellation functions.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/b86781d047727c07163443b57551a3fa57c7c5e1.1655371007.git.asml.silence@gmail.com
Reviewed-by: Hao Xu <howeyxu@tencent.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/io_uring/cancel.c b/io_uring/cancel.c
index f28f0a7d1272..f07bfd27c98a 100644
--- a/io_uring/cancel.c
+++ b/io_uring/cancel.c
@@ -78,7 +78,8 @@ static int io_async_cancel_one(struct io_uring_task *tctx,
 	return ret;
 }
 
-int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd)
+int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd,
+		  unsigned issue_flags)
 {
 	struct io_ring_ctx *ctx = req->ctx;
 	int ret;
@@ -93,7 +94,7 @@ int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd)
 	if (!ret)
 		return 0;
 
-	ret = io_poll_cancel(ctx, cd);
+	ret = io_poll_cancel(ctx, cd, issue_flags);
 	if (ret != -ENOENT)
 		return ret;
 
@@ -136,7 +137,7 @@ static int __io_async_cancel(struct io_cancel_data *cd, struct io_kiocb *req,
 	int ret, nr = 0;
 
 	do {
-		ret = io_try_cancel(req, cd);
+		ret = io_try_cancel(req, cd, issue_flags);
 		if (ret == -ENOENT)
 			break;
 		if (!all)
diff --git a/io_uring/cancel.h b/io_uring/cancel.h
index fd4cb1a2595d..8dd259dc383e 100644
--- a/io_uring/cancel.h
+++ b/io_uring/cancel.h
@@ -3,5 +3,6 @@
 int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
 int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags);
 
-int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd);
+int io_try_cancel(struct io_kiocb *req, struct io_cancel_data *cd,
+		  unsigned int issue_flags);
 void init_hash_table(struct io_hash_table *table, unsigned size);
diff --git a/io_uring/poll.c b/io_uring/poll.c
index ea6466388ed9..c4edf8794538 100644
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -649,7 +649,8 @@ static int __io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
 	return req ? 0 : -ENOENT;
 }
 
-int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd)
+int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
+		   unsigned issue_flags)
 {
 	return __io_poll_cancel(ctx, cd, &ctx->cancel_table);
 }
diff --git a/io_uring/poll.h b/io_uring/poll.h
index cc75c1567a84..fa3e19790281 100644
--- a/io_uring/poll.h
+++ b/io_uring/poll.h
@@ -24,7 +24,8 @@ int io_poll_add(struct io_kiocb *req, unsigned int issue_flags);
 int io_poll_remove_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
 int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags);
 
-int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd);
+int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
+		   unsigned issue_flags);
 int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
 bool io_poll_remove_all(struct io_ring_ctx *ctx, struct task_struct *tsk,
 			bool cancel_all);
diff --git a/io_uring/timeout.c b/io_uring/timeout.c
index 69cca42d6835..526fc8b2e3b6 100644
--- a/io_uring/timeout.c
+++ b/io_uring/timeout.c
@@ -262,6 +262,7 @@ int io_timeout_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd)
 
 static void io_req_task_link_timeout(struct io_kiocb *req, bool *locked)
 {
+	unsigned issue_flags = *locked ? 0 : IO_URING_F_UNLOCKED;
 	struct io_timeout *timeout = io_kiocb_to_cmd(req);
 	struct io_kiocb *prev = timeout->prev;
 	int ret = -ENOENT;
@@ -273,7 +274,7 @@ static void io_req_task_link_timeout(struct io_kiocb *req, bool *locked)
 				.data		= prev->cqe.user_data,
 			};
 
-			ret = io_try_cancel(req, &cd);
+			ret = io_try_cancel(req, &cd, issue_flags);
 		}
 		io_req_set_res(req, ret ?: -ETIME, 0);
 		io_req_complete_post(req);