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65 lines
1.5 KiB
65 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/kernel.h> |
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#include <linux/errno.h> |
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#include <linux/file.h> |
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#include <linux/fs.h> |
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#include <linux/uaccess.h> |
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#include <linux/io_uring.h> |
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#include <linux/eventpoll.h> |
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#include <uapi/linux/io_uring.h> |
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#include "io_uring.h" |
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#include "epoll.h" |
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#if defined(CONFIG_EPOLL) |
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struct io_epoll { |
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struct file *file; |
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int epfd; |
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int op; |
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int fd; |
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struct epoll_event event; |
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}; |
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int io_epoll_ctl_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
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{ |
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struct io_epoll *epoll = io_kiocb_to_cmd(req, struct io_epoll); |
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pr_warn_once("%s: epoll_ctl support in io_uring is deprecated and will " |
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"be removed in a future Linux kernel version.\n", |
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current->comm); |
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if (sqe->buf_index || sqe->splice_fd_in) |
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return -EINVAL; |
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epoll->epfd = READ_ONCE(sqe->fd); |
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epoll->op = READ_ONCE(sqe->len); |
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epoll->fd = READ_ONCE(sqe->off); |
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if (ep_op_has_event(epoll->op)) { |
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struct epoll_event __user *ev; |
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ev = u64_to_user_ptr(READ_ONCE(sqe->addr)); |
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if (copy_from_user(&epoll->event, ev, sizeof(*ev))) |
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return -EFAULT; |
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} |
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return 0; |
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} |
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int io_epoll_ctl(struct io_kiocb *req, unsigned int issue_flags) |
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{ |
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struct io_epoll *ie = io_kiocb_to_cmd(req, struct io_epoll); |
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int ret; |
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bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK; |
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ret = do_epoll_ctl(ie->epfd, ie->op, ie->fd, &ie->event, force_nonblock); |
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if (force_nonblock && ret == -EAGAIN) |
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return -EAGAIN; |
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if (ret < 0) |
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req_set_fail(req); |
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io_req_set_res(req, ret, 0); |
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return IOU_OK; |
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} |
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#endif
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