Commit 227685eb authored by Hao Xu's avatar Hao Xu Committed by Jens Axboe
Browse files

io_uring: add REQ_F_APOLL_MULTISHOT for requests 



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. Also add a mask IO_APOLL_MULTI_POLLED which stands for
REQ_F_APOLL_MULTI | REQ_F_POLLED, to make the code short and cleaner.

Signed-off-by: default avatarHao Xu <howeyxu@tencent.com>
Link: https://lore.kernel.org/r/20220514142046.58072-3-haoxu.linux@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 390ed29b

fs/io_uring.c

+5 −0
Original line number Diff line number Diff line
@@ -116,6 +116,8 @@ 
#define IO_REQ_CLEAN_SLOW_FLAGS (REQ_F_REFCOUNT | REQ_F_LINK | REQ_F_HARDLINK |\

				 IO_REQ_CLEAN_FLAGS)



#define IO_APOLL_MULTI_POLLED (REQ_F_APOLL_MULTISHOT | REQ_F_POLLED)



#define IO_TCTX_REFS_CACHE_NR	(1U << 10)



struct io_uring {
@@ -812,6 +814,7 @@ 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,
@@ -876,6 +879,8 @@ 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 {