| Quellcodebibliothek Statistik Leitseite products/sources/formale Sprachen/C/Linux/io_uring/ (Open Source Betriebssystem Version 6.17.9©) Datei vom 24.10.2025 mit Größe 2 kB |
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Quelle epoll.c Sprache: C |
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// 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.h" #include "epoll.h" struct io_epoll { struct file *file; int epfd; int op; int fd; struct epoll_event event; }; struct io_epoll_wait { struct file *file; int maxevents; struct epoll_event __user *events; }; int io_epoll_ctl_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { struct io_epoll *epoll = io_kiocb_to_cmd(req, struct io_epoll); 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, struct io_epoll); 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_COMPLETE; } int io_epoll_wait_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) { struct io_epoll_wait *iew = io_kiocb_to_cmd(req, struct io_epoll_wait); if (sqe->off || sqe->rw_flags || sqe->buf_index || sqe->splice_fd_in) return -EINVAL; iew->maxevents = READ_ONCE(sqe->len); iew->events = u64_to_user_ptr(READ_ONCE(sqe->addr)); return 0; } int io_epoll_wait(struct io_kiocb *req, unsigned int issue_flags) { struct io_epoll_wait *iew = io_kiocb_to_cmd(req, struct io_epoll_wait); int ret; ret = epoll_sendevents(req->file, iew->events, iew->maxevents); if (ret == 0) return -EAGAIN; if (ret < 0) req_set_fail(req); io_req_set_res(req, ret, 0); return IOU_COMPLETE; } ¤ Dauer der Verarbeitung: 0.16 Sekunden (vorverarbeitet) ¤*© Formatika GbR, Deutschland |
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2026-03-28