forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
io_uring: move epoll handler to its own file
Would be nice to sort out Kconfig for this and don't even compile epoll.c if we don't have epoll configured. Signed-off-by: Jens Axboe <[email protected]>
- Loading branch information
Showing
4 changed files
with
70 additions
and
50 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,62 @@ | ||
// SPDX-License-Identifier: GPL-2.0 | ||
#include <linux/kernel.h> | ||
#include <linux/errno.h> | ||
#include <linux/file.h> | ||
#include <linux/fs.h> | ||
#include <linux/uaccess.h> | ||
#include <linux/io_uring.h> | ||
#include <linux/eventpoll.h> | ||
|
||
#include <uapi/linux/io_uring.h> | ||
|
||
#include "io_uring_types.h" | ||
#include "io_uring.h" | ||
#include "epoll.h" | ||
|
||
#if defined(CONFIG_EPOLL) | ||
struct io_epoll { | ||
struct file *file; | ||
int epfd; | ||
int op; | ||
int fd; | ||
struct epoll_event event; | ||
}; | ||
|
||
int io_epoll_ctl_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) | ||
{ | ||
struct io_epoll *epoll = io_kiocb_to_cmd(req); | ||
|
||
if (sqe->buf_index || sqe->splice_fd_in) | ||
return -EINVAL; | ||
|
||
epoll->epfd = READ_ONCE(sqe->fd); | ||
epoll->op = READ_ONCE(sqe->len); | ||
epoll->fd = READ_ONCE(sqe->off); | ||
|
||
if (ep_op_has_event(epoll->op)) { | ||
struct epoll_event __user *ev; | ||
|
||
ev = u64_to_user_ptr(READ_ONCE(sqe->addr)); | ||
if (copy_from_user(&epoll->event, ev, sizeof(*ev))) | ||
return -EFAULT; | ||
} | ||
|
||
return 0; | ||
} | ||
|
||
int io_epoll_ctl(struct io_kiocb *req, unsigned int issue_flags) | ||
{ | ||
struct io_epoll *ie = io_kiocb_to_cmd(req); | ||
int ret; | ||
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; | ||
|
||
ret = do_epoll_ctl(ie->epfd, ie->op, ie->fd, &ie->event, force_nonblock); | ||
if (force_nonblock && ret == -EAGAIN) | ||
return -EAGAIN; | ||
|
||
if (ret < 0) | ||
req_set_fail(req); | ||
io_req_set_res(req, ret, 0); | ||
return IOU_OK; | ||
} | ||
#endif |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,6 @@ | ||
// SPDX-License-Identifier: GPL-2.0 | ||
|
||
#if defined(CONFIG_EPOLL) | ||
int io_epoll_ctl_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); | ||
int io_epoll_ctl(struct io_kiocb *req, unsigned int issue_flags); | ||
#endif |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters