diff options
Diffstat (limited to 'io_uring/epoll.c')
| -rw-r--r-- | io_uring/epoll.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/io_uring/epoll.c b/io_uring/epoll.c index 89bff2068a19..6d2c48ba1923 100644 --- a/io_uring/epoll.c +++ b/io_uring/epoll.c @@ -12,7 +12,6 @@ #include "io_uring.h" #include "epoll.h" -#if defined(CONFIG_EPOLL) struct io_epoll { struct file *file; int epfd; @@ -21,6 +20,12 @@ struct io_epoll { 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); @@ -58,4 +63,30 @@ int io_epoll_ctl(struct io_kiocb *req, unsigned int issue_flags) io_req_set_res(req, ret, 0); return IOU_OK; } -#endif + +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_OK; +} |