mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/
synced 2026-04-17 22:23:45 -04:00
b955754959
Some commands like timestamping in the next patch can make use of multishot polling, i.e. REQ_F_APOLL_MULTISHOT. Add support for that, which is condensed in a single helper called io_cmd_poll_multishot(). The user who wants to continue with a request in a multishot mode must call the function, and only if it returns 0 the user is free to proceed. Apart from normal terminal errors, it can also end up with -EIOCBQUEUED, in which case the user must forward it to the core io_uring. It's forbidden to use task work while the request is executing in a multishot mode. The API is not foolproof, hence it's not exported to modules nor exposed in public headers. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/bcf97c31659662c72b69fc8fcdf2a88cfc16e430.1750065793.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
24 lines
716 B
C
24 lines
716 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#include <linux/io_uring/cmd.h>
|
|
#include <linux/io_uring_types.h>
|
|
|
|
struct io_async_cmd {
|
|
struct io_uring_cmd_data data;
|
|
struct iou_vec vec;
|
|
struct io_uring_sqe sqes[2];
|
|
};
|
|
|
|
int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags);
|
|
int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
|
|
void io_uring_cmd_sqe_copy(struct io_kiocb *req);
|
|
void io_uring_cmd_cleanup(struct io_kiocb *req);
|
|
|
|
bool io_uring_try_cancel_uring_cmd(struct io_ring_ctx *ctx,
|
|
struct io_uring_task *tctx, bool cancel_all);
|
|
|
|
void io_cmd_cache_free(const void *entry);
|
|
|
|
int io_cmd_poll_multishot(struct io_uring_cmd *cmd,
|
|
unsigned int issue_flags, __poll_t mask);
|