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io_uring: add REQ_F_APOLL_MULTISHOT for requests

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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: Hao Xu <howeyxu@tencent.com>
Link: https://lore.kernel.org/r/20220514142046.58072-3-haoxu.linux@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hao Xu 2022-05-14 22:20:44 +08:00 committed by Jens Axboe
parent 390ed29b5e
commit 227685ebfa
1 changed files with 5 additions and 0 deletions
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5
fs/io_uring.c
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@ -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 {