linux-kernel - [PATCH 2/5] io_uring: add REQ_F_APOLL

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Date:   Fri,  6 May 2022 15:00:59 +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 2/5] io_uring: add REQ_F_APOLL_MULTISHOT for requests

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

Add a flag to indicate multishot mode for fast poll. currently only
accept use it, but there may be more operations leveraging it in the
future.

Signed-off-by: Hao Xu <howeyxu@...cent.com>
---
 fs/io_uring.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 1e7466079af7..8ebb1a794e36 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -808,6 +808,7 @@ enum {
 	REQ_F_SINGLE_POLL_BIT,
 	REQ_F_DOUBLE_POLL_BIT,
 	REQ_F_PARTIAL_IO_BIT,
+	REQ_F_APOLL_MULTISHOT_BIT,
 	/* keep async read/write and isreg together and in order */
 	REQ_F_SUPPORT_NOWAIT_BIT,
 	REQ_F_ISREG_BIT,
@@ -872,6 +873,8 @@ enum {
 	REQ_F_DOUBLE_POLL	= BIT(REQ_F_DOUBLE_POLL_BIT),
 	/* request has already done partial IO */
 	REQ_F_PARTIAL_IO	= BIT(REQ_F_PARTIAL_IO_BIT),
+	/* fast poll multishot mode */
+	REQ_F_APOLL_MULTISHOT	= BIT(REQ_F_APOLL_MULTISHOT_BIT),
 };
 
 struct async_poll {
-- 
2.36.0