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| author | Hao Xu <howeyxu@tencent.com> | 2022-05-14 22:35:31 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-05-14 09:15:38 -0600 |
| commit | 305eb96b9dbb84a3dd3151d0debde753a354d81e (patch) | |
| tree | 284038cc0814d5f23e027971b0cee4c5bea71212 | |
| parent | e7c7089e352f5a6ead9c409a7d8a43ffe9cd59a5 (diff) | |
| download | liburing-305eb96b9dbb84a3dd3151d0debde753a354d81e.tar.gz liburing-305eb96b9dbb84a3dd3151d0debde753a354d81e.tar.bz2 | |
liburing.h: add api to support multishot accept direct
This is to support the multishot accept directly to the fixed table, the
file_Index should be set to IORING_FILE_INDEX_ALLOC in this case.
Signed-off-by: Hao Xu <howeyxu@tencent.com>
Link: https://lore.kernel.org/r/20220514143534.59162-4-haoxu.linux@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | src/include/liburing.h | 11 | ||||
| -rw-r--r-- | src/include/liburing/io_uring.h | 9 |
2 files changed, 20 insertions, 0 deletions
diff --git a/src/include/liburing.h b/src/include/liburing.h index cf50383..9065555 100644 --- a/src/include/liburing.h +++ b/src/include/liburing.h @@ -512,6 +512,17 @@ static inline void io_uring_prep_multishot_accept(struct io_uring_sqe *sqe, sqe->ioprio |= IORING_ACCEPT_MULTISHOT; } +/* multishot accept directly into the fixed file table */ +static inline void io_uring_prep_multishot_accept_direct(struct io_uring_sqe *sqe, + int fd, + struct sockaddr *addr, + socklen_t *addrlen, + int flags) +{ + io_uring_prep_multishot_accept(sqe, fd, addr, addrlen, flags); + __io_uring_set_target_fixed_file(sqe, IORING_FILE_INDEX_ALLOC - 1); +} + static inline void io_uring_prep_cancel(struct io_uring_sqe *sqe, __u64 user_data, int flags) { diff --git a/src/include/liburing/io_uring.h b/src/include/liburing/io_uring.h index 46765d2..6260e0d 100644 --- a/src/include/liburing/io_uring.h +++ b/src/include/liburing/io_uring.h @@ -67,6 +67,15 @@ struct io_uring_sqe { __u64 __pad2[2]; }; +/* + * If sqe->file_index is set to this for opcodes that instantiate a new + * direct descriptor (like openat/openat2/accept), then io_uring will allocate + * an available direct descriptor instead of having the application pass one + * in. The picked direct descriptor will be returned in cqe->res, or -ENFILE + * if the space is full. + */ +#define IORING_FILE_INDEX_ALLOC (~0U) + enum { IOSQE_FIXED_FILE_BIT, IOSQE_IO_DRAIN_BIT, |