linux-kernel - [PATCH 4/5] io_uring: add a helper for poll clean

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Date:   Fri,  6 May 2022 15:01:01 +0800
From:   Hao Xu <haoxu.linux@...il.com>
To:     io-uring@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>,
        Pavel Begunkov <asml.silence@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/5] io_uring: add a helper for poll clean

From: Hao Xu <howeyxu@...cent.com>

Add a helper for poll clean, it will be used in the multishot accept in
the later patches.

Signed-off-by: Hao Xu <howeyxu@...cent.com>
---
 fs/io_uring.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d33777575faf..0a83ecc457d1 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5711,6 +5711,23 @@ static int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	return 0;
 }
 
+static inline void __io_poll_clean(struct io_kiocb *req)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+
+	io_poll_remove_entries(req);
+	spin_lock(&ctx->completion_lock);
+	hash_del(&req->hash_node);
+	spin_unlock(&ctx->completion_lock);
+}
+
+#define REQ_F_APOLL_MULTI_POLLED (REQ_F_APOLL_MULTISHOT | REQ_F_POLLED)
+static inline void io_poll_clean(struct io_kiocb *req)
+{
+	if ((req->flags & REQ_F_APOLL_MULTI_POLLED) == REQ_F_APOLL_MULTI_POLLED)
+		__io_poll_clean(req);
+}
+
 static int io_accept(struct io_kiocb *req, unsigned int issue_flags)
 {
 	struct io_accept *accept = &req->accept;
@@ -6041,17 +6058,13 @@ static void io_poll_task_func(struct io_kiocb *req, bool *locked)
 
 static void io_apoll_task_func(struct io_kiocb *req, bool *locked)
 {
-	struct io_ring_ctx *ctx = req->ctx;
 	int ret;
 
 	ret = io_poll_check_events(req, locked);
 	if (ret > 0)
 		return;
 
-	io_poll_remove_entries(req);
-	spin_lock(&ctx->completion_lock);
-	hash_del(&req->hash_node);
-	spin_unlock(&ctx->completion_lock);
+	__io_poll_clean(req);
 
 	if (!ret)
 		io_req_task_submit(req, locked);
-- 
2.36.0