LCOV - code coverage report
Current view: top level - io_uring - epoll.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 18 0.0 %
Date: 2023-07-19 18:55:55 Functions: 0 2 0.0 %

          Line data    Source code
       1             : // SPDX-License-Identifier: GPL-2.0
       2             : #include <linux/kernel.h>
       3             : #include <linux/errno.h>
       4             : #include <linux/file.h>
       5             : #include <linux/fs.h>
       6             : #include <linux/uaccess.h>
       7             : #include <linux/io_uring.h>
       8             : #include <linux/eventpoll.h>
       9             : 
      10             : #include <uapi/linux/io_uring.h>
      11             : 
      12             : #include "io_uring.h"
      13             : #include "epoll.h"
      14             : 
      15             : #if defined(CONFIG_EPOLL)
      16             : struct io_epoll {
      17             :         struct file                     *file;
      18             :         int                             epfd;
      19             :         int                             op;
      20             :         int                             fd;
      21             :         struct epoll_event              event;
      22             : };
      23             : 
      24           0 : int io_epoll_ctl_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
      25             : {
      26           0 :         struct io_epoll *epoll = io_kiocb_to_cmd(req, struct io_epoll);
      27             : 
      28           0 :         if (sqe->buf_index || sqe->splice_fd_in)
      29             :                 return -EINVAL;
      30             : 
      31           0 :         epoll->epfd = READ_ONCE(sqe->fd);
      32           0 :         epoll->op = READ_ONCE(sqe->len);
      33           0 :         epoll->fd = READ_ONCE(sqe->off);
      34             : 
      35           0 :         if (ep_op_has_event(epoll->op)) {
      36             :                 struct epoll_event __user *ev;
      37             : 
      38           0 :                 ev = u64_to_user_ptr(READ_ONCE(sqe->addr));
      39           0 :                 if (copy_from_user(&epoll->event, ev, sizeof(*ev)))
      40             :                         return -EFAULT;
      41             :         }
      42             : 
      43             :         return 0;
      44             : }
      45             : 
      46           0 : int io_epoll_ctl(struct io_kiocb *req, unsigned int issue_flags)
      47             : {
      48           0 :         struct io_epoll *ie = io_kiocb_to_cmd(req, struct io_epoll);
      49             :         int ret;
      50           0 :         bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
      51             : 
      52           0 :         ret = do_epoll_ctl(ie->epfd, ie->op, ie->fd, &ie->event, force_nonblock);
      53           0 :         if (force_nonblock && ret == -EAGAIN)
      54             :                 return -EAGAIN;
      55             : 
      56           0 :         if (ret < 0)
      57           0 :                 req_set_fail(req);
      58           0 :         io_req_set_res(req, ret, 0);
      59           0 :         return IOU_OK;
      60             : }
      61             : #endif

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