780 lines
18 KiB
C
780 lines
18 KiB
C
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// 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/slab.h>
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#include <linux/net.h>
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#include <linux/compat.h>
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#include <net/compat.h>
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#include <linux/io_uring.h>
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#include <uapi/linux/io_uring.h>
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#include "io_uring_types.h"
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#include "io_uring.h"
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#include "net.h"
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#if defined(CONFIG_NET)
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struct io_shutdown {
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struct file *file;
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int how;
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};
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struct io_accept {
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struct file *file;
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struct sockaddr __user *addr;
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int __user *addr_len;
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int flags;
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u32 file_slot;
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unsigned long nofile;
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};
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struct io_socket {
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struct file *file;
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int domain;
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int type;
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int protocol;
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int flags;
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u32 file_slot;
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unsigned long nofile;
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};
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struct io_connect {
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struct file *file;
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struct sockaddr __user *addr;
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int addr_len;
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};
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struct io_sr_msg {
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struct file *file;
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union {
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struct compat_msghdr __user *umsg_compat;
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struct user_msghdr __user *umsg;
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void __user *buf;
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};
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int msg_flags;
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size_t len;
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size_t done_io;
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unsigned int flags;
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};
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#define IO_APOLL_MULTI_POLLED (REQ_F_APOLL_MULTISHOT | REQ_F_POLLED)
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int io_shutdown_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
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{
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struct io_shutdown *shutdown = io_kiocb_to_cmd(req);
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if (unlikely(sqe->off || sqe->addr || sqe->rw_flags ||
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sqe->buf_index || sqe->splice_fd_in))
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return -EINVAL;
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shutdown->how = READ_ONCE(sqe->len);
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return 0;
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}
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int io_shutdown(struct io_kiocb *req, unsigned int issue_flags)
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{
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struct io_shutdown *shutdown = io_kiocb_to_cmd(req);
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struct socket *sock;
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int ret;
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if (issue_flags & IO_URING_F_NONBLOCK)
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return -EAGAIN;
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sock = sock_from_file(req->file);
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if (unlikely(!sock))
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return -ENOTSOCK;
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ret = __sys_shutdown_sock(sock, shutdown->how);
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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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static bool io_net_retry(struct socket *sock, int flags)
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{
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if (!(flags & MSG_WAITALL))
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return false;
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return sock->type == SOCK_STREAM || sock->type == SOCK_SEQPACKET;
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}
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static int io_setup_async_msg(struct io_kiocb *req,
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struct io_async_msghdr *kmsg)
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{
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struct io_async_msghdr *async_msg = req->async_data;
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if (async_msg)
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return -EAGAIN;
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if (io_alloc_async_data(req)) {
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kfree(kmsg->free_iov);
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return -ENOMEM;
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}
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async_msg = req->async_data;
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req->flags |= REQ_F_NEED_CLEANUP;
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memcpy(async_msg, kmsg, sizeof(*kmsg));
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async_msg->msg.msg_name = &async_msg->addr;
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/* if were using fast_iov, set it to the new one */
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if (!async_msg->free_iov)
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async_msg->msg.msg_iter.iov = async_msg->fast_iov;
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return -EAGAIN;
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}
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static int io_sendmsg_copy_hdr(struct io_kiocb *req,
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struct io_async_msghdr *iomsg)
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{
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struct io_sr_msg *sr = io_kiocb_to_cmd(req);
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iomsg->msg.msg_name = &iomsg->addr;
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iomsg->free_iov = iomsg->fast_iov;
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return sendmsg_copy_msghdr(&iomsg->msg, sr->umsg, sr->msg_flags,
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&iomsg->free_iov);
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}
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int io_sendmsg_prep_async(struct io_kiocb *req)
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{
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int ret;
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ret = io_sendmsg_copy_hdr(req, req->async_data);
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if (!ret)
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req->flags |= REQ_F_NEED_CLEANUP;
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return ret;
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}
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void io_sendmsg_recvmsg_cleanup(struct io_kiocb *req)
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{
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struct io_async_msghdr *io = req->async_data;
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kfree(io->free_iov);
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}
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int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
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{
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struct io_sr_msg *sr = io_kiocb_to_cmd(req);
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if (unlikely(sqe->file_index || sqe->addr2))
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return -EINVAL;
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sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
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sr->len = READ_ONCE(sqe->len);
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sr->flags = READ_ONCE(sqe->ioprio);
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if (sr->flags & ~IORING_RECVSEND_POLL_FIRST)
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return -EINVAL;
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sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL;
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if (sr->msg_flags & MSG_DONTWAIT)
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req->flags |= REQ_F_NOWAIT;
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#ifdef CONFIG_COMPAT
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if (req->ctx->compat)
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sr->msg_flags |= MSG_CMSG_COMPAT;
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#endif
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sr->done_io = 0;
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return 0;
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}
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int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags)
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{
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struct io_sr_msg *sr = io_kiocb_to_cmd(req);
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struct io_async_msghdr iomsg, *kmsg;
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struct socket *sock;
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unsigned flags;
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int min_ret = 0;
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int ret;
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sock = sock_from_file(req->file);
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if (unlikely(!sock))
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return -ENOTSOCK;
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if (req_has_async_data(req)) {
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kmsg = req->async_data;
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} else {
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ret = io_sendmsg_copy_hdr(req, &iomsg);
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if (ret)
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return ret;
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kmsg = &iomsg;
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}
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if (!(req->flags & REQ_F_POLLED) &&
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(sr->flags & IORING_RECVSEND_POLL_FIRST))
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return io_setup_async_msg(req, kmsg);
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flags = sr->msg_flags;
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if (issue_flags & IO_URING_F_NONBLOCK)
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flags |= MSG_DONTWAIT;
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if (flags & MSG_WAITALL)
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min_ret = iov_iter_count(&kmsg->msg.msg_iter);
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ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags);
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if (ret < min_ret) {
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if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK))
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return io_setup_async_msg(req, kmsg);
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if (ret == -ERESTARTSYS)
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ret = -EINTR;
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if (ret > 0 && io_net_retry(sock, flags)) {
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sr->done_io += ret;
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req->flags |= REQ_F_PARTIAL_IO;
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return io_setup_async_msg(req, kmsg);
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}
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req_set_fail(req);
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}
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/* fast path, check for non-NULL to avoid function call */
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if (kmsg->free_iov)
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kfree(kmsg->free_iov);
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req->flags &= ~REQ_F_NEED_CLEANUP;
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if (ret >= 0)
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ret += sr->done_io;
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else if (sr->done_io)
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ret = sr->done_io;
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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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int io_send(struct io_kiocb *req, unsigned int issue_flags)
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{
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struct io_sr_msg *sr = io_kiocb_to_cmd(req);
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struct msghdr msg;
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struct iovec iov;
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struct socket *sock;
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unsigned flags;
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int min_ret = 0;
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int ret;
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if (!(req->flags & REQ_F_POLLED) &&
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(sr->flags & IORING_RECVSEND_POLL_FIRST))
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return -EAGAIN;
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sock = sock_from_file(req->file);
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if (unlikely(!sock))
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return -ENOTSOCK;
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ret = import_single_range(WRITE, sr->buf, sr->len, &iov, &msg.msg_iter);
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if (unlikely(ret))
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return ret;
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msg.msg_name = NULL;
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msg.msg_control = NULL;
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msg.msg_controllen = 0;
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msg.msg_namelen = 0;
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flags = sr->msg_flags;
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if (issue_flags & IO_URING_F_NONBLOCK)
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flags |= MSG_DONTWAIT;
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if (flags & MSG_WAITALL)
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min_ret = iov_iter_count(&msg.msg_iter);
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msg.msg_flags = flags;
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ret = sock_sendmsg(sock, &msg);
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if (ret < min_ret) {
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if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK))
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return -EAGAIN;
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if (ret == -ERESTARTSYS)
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ret = -EINTR;
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if (ret > 0 && io_net_retry(sock, flags)) {
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sr->len -= ret;
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sr->buf += ret;
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sr->done_io += ret;
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req->flags |= REQ_F_PARTIAL_IO;
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return -EAGAIN;
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}
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req_set_fail(req);
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}
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if (ret >= 0)
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ret += sr->done_io;
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else if (sr->done_io)
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ret = sr->done_io;
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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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static int __io_recvmsg_copy_hdr(struct io_kiocb *req,
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struct io_async_msghdr *iomsg)
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{
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struct io_sr_msg *sr = io_kiocb_to_cmd(req);
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struct iovec __user *uiov;
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size_t iov_len;
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int ret;
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ret = __copy_msghdr_from_user(&iomsg->msg, sr->umsg,
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&iomsg->uaddr, &uiov, &iov_len);
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if (ret)
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return ret;
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if (req->flags & REQ_F_BUFFER_SELECT) {
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if (iov_len > 1)
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return -EINVAL;
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if (copy_from_user(iomsg->fast_iov, uiov, sizeof(*uiov)))
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return -EFAULT;
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sr->len = iomsg->fast_iov[0].iov_len;
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iomsg->free_iov = NULL;
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} else {
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iomsg->free_iov = iomsg->fast_iov;
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ret = __import_iovec(READ, uiov, iov_len, UIO_FASTIOV,
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&iomsg->free_iov, &iomsg->msg.msg_iter,
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false);
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if (ret > 0)
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ret = 0;
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}
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return ret;
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}
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#ifdef CONFIG_COMPAT
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static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req,
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struct io_async_msghdr *iomsg)
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{
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struct io_sr_msg *sr = io_kiocb_to_cmd(req);
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struct compat_iovec __user *uiov;
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compat_uptr_t ptr;
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compat_size_t len;
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int ret;
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ret = __get_compat_msghdr(&iomsg->msg, sr->umsg_compat, &iomsg->uaddr,
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&ptr, &len);
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if (ret)
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return ret;
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uiov = compat_ptr(ptr);
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if (req->flags & REQ_F_BUFFER_SELECT) {
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compat_ssize_t clen;
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if (len > 1)
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return -EINVAL;
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if (!access_ok(uiov, sizeof(*uiov)))
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return -EFAULT;
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if (__get_user(clen, &uiov->iov_len))
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return -EFAULT;
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if (clen < 0)
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return -EINVAL;
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sr->len = clen;
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iomsg->free_iov = NULL;
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} else {
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iomsg->free_iov = iomsg->fast_iov;
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ret = __import_iovec(READ, (struct iovec __user *)uiov, len,
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UIO_FASTIOV, &iomsg->free_iov,
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&iomsg->msg.msg_iter, true);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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#endif
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static int io_recvmsg_copy_hdr(struct io_kiocb *req,
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struct io_async_msghdr *iomsg)
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{
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iomsg->msg.msg_name = &iomsg->addr;
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#ifdef CONFIG_COMPAT
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if (req->ctx->compat)
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return __io_compat_recvmsg_copy_hdr(req, iomsg);
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#endif
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|
|
return __io_recvmsg_copy_hdr(req, iomsg);
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_recvmsg_prep_async(struct io_kiocb *req)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = io_recvmsg_copy_hdr(req, req->async_data);
|
||
|
|
if (!ret)
|
||
|
|
req->flags |= REQ_F_NEED_CLEANUP;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||
|
|
{
|
||
|
|
struct io_sr_msg *sr = io_kiocb_to_cmd(req);
|
||
|
|
|
||
|
|
if (unlikely(sqe->file_index || sqe->addr2))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
|
||
|
|
sr->len = READ_ONCE(sqe->len);
|
||
|
|
sr->flags = READ_ONCE(sqe->ioprio);
|
||
|
|
if (sr->flags & ~IORING_RECVSEND_POLL_FIRST)
|
||
|
|
return -EINVAL;
|
||
|
|
sr->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL;
|
||
|
|
if (sr->msg_flags & MSG_DONTWAIT)
|
||
|
|
req->flags |= REQ_F_NOWAIT;
|
||
|
|
if (sr->msg_flags & MSG_ERRQUEUE)
|
||
|
|
req->flags |= REQ_F_CLEAR_POLLIN;
|
||
|
|
|
||
|
|
#ifdef CONFIG_COMPAT
|
||
|
|
if (req->ctx->compat)
|
||
|
|
sr->msg_flags |= MSG_CMSG_COMPAT;
|
||
|
|
#endif
|
||
|
|
sr->done_io = 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_sr_msg *sr = io_kiocb_to_cmd(req);
|
||
|
|
struct io_async_msghdr iomsg, *kmsg;
|
||
|
|
struct socket *sock;
|
||
|
|
unsigned int cflags;
|
||
|
|
unsigned flags;
|
||
|
|
int ret, min_ret = 0;
|
||
|
|
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
|
||
|
|
|
||
|
|
sock = sock_from_file(req->file);
|
||
|
|
if (unlikely(!sock))
|
||
|
|
return -ENOTSOCK;
|
||
|
|
|
||
|
|
if (req_has_async_data(req)) {
|
||
|
|
kmsg = req->async_data;
|
||
|
|
} else {
|
||
|
|
ret = io_recvmsg_copy_hdr(req, &iomsg);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
kmsg = &iomsg;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(req->flags & REQ_F_POLLED) &&
|
||
|
|
(sr->flags & IORING_RECVSEND_POLL_FIRST))
|
||
|
|
return io_setup_async_msg(req, kmsg);
|
||
|
|
|
||
|
|
if (io_do_buffer_select(req)) {
|
||
|
|
void __user *buf;
|
||
|
|
|
||
|
|
buf = io_buffer_select(req, &sr->len, issue_flags);
|
||
|
|
if (!buf)
|
||
|
|
return -ENOBUFS;
|
||
|
|
kmsg->fast_iov[0].iov_base = buf;
|
||
|
|
kmsg->fast_iov[0].iov_len = sr->len;
|
||
|
|
iov_iter_init(&kmsg->msg.msg_iter, READ, kmsg->fast_iov, 1,
|
||
|
|
sr->len);
|
||
|
|
}
|
||
|
|
|
||
|
|
flags = sr->msg_flags;
|
||
|
|
if (force_nonblock)
|
||
|
|
flags |= MSG_DONTWAIT;
|
||
|
|
if (flags & MSG_WAITALL)
|
||
|
|
min_ret = iov_iter_count(&kmsg->msg.msg_iter);
|
||
|
|
|
||
|
|
kmsg->msg.msg_get_inq = 1;
|
||
|
|
ret = __sys_recvmsg_sock(sock, &kmsg->msg, sr->umsg, kmsg->uaddr, flags);
|
||
|
|
if (ret < min_ret) {
|
||
|
|
if (ret == -EAGAIN && force_nonblock)
|
||
|
|
return io_setup_async_msg(req, kmsg);
|
||
|
|
if (ret == -ERESTARTSYS)
|
||
|
|
ret = -EINTR;
|
||
|
|
if (ret > 0 && io_net_retry(sock, flags)) {
|
||
|
|
sr->done_io += ret;
|
||
|
|
req->flags |= REQ_F_PARTIAL_IO;
|
||
|
|
return io_setup_async_msg(req, kmsg);
|
||
|
|
}
|
||
|
|
req_set_fail(req);
|
||
|
|
} else if ((flags & MSG_WAITALL) && (kmsg->msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) {
|
||
|
|
req_set_fail(req);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* fast path, check for non-NULL to avoid function call */
|
||
|
|
if (kmsg->free_iov)
|
||
|
|
kfree(kmsg->free_iov);
|
||
|
|
req->flags &= ~REQ_F_NEED_CLEANUP;
|
||
|
|
if (ret >= 0)
|
||
|
|
ret += sr->done_io;
|
||
|
|
else if (sr->done_io)
|
||
|
|
ret = sr->done_io;
|
||
|
|
cflags = io_put_kbuf(req, issue_flags);
|
||
|
|
if (kmsg->msg.msg_inq)
|
||
|
|
cflags |= IORING_CQE_F_SOCK_NONEMPTY;
|
||
|
|
io_req_set_res(req, ret, cflags);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_recv(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_sr_msg *sr = io_kiocb_to_cmd(req);
|
||
|
|
struct msghdr msg;
|
||
|
|
struct socket *sock;
|
||
|
|
struct iovec iov;
|
||
|
|
unsigned int cflags;
|
||
|
|
unsigned flags;
|
||
|
|
int ret, min_ret = 0;
|
||
|
|
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
|
||
|
|
|
||
|
|
if (!(req->flags & REQ_F_POLLED) &&
|
||
|
|
(sr->flags & IORING_RECVSEND_POLL_FIRST))
|
||
|
|
return -EAGAIN;
|
||
|
|
|
||
|
|
sock = sock_from_file(req->file);
|
||
|
|
if (unlikely(!sock))
|
||
|
|
return -ENOTSOCK;
|
||
|
|
|
||
|
|
if (io_do_buffer_select(req)) {
|
||
|
|
void __user *buf;
|
||
|
|
|
||
|
|
buf = io_buffer_select(req, &sr->len, issue_flags);
|
||
|
|
if (!buf)
|
||
|
|
return -ENOBUFS;
|
||
|
|
sr->buf = buf;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = import_single_range(READ, sr->buf, sr->len, &iov, &msg.msg_iter);
|
||
|
|
if (unlikely(ret))
|
||
|
|
goto out_free;
|
||
|
|
|
||
|
|
msg.msg_name = NULL;
|
||
|
|
msg.msg_namelen = 0;
|
||
|
|
msg.msg_control = NULL;
|
||
|
|
msg.msg_get_inq = 1;
|
||
|
|
msg.msg_flags = 0;
|
||
|
|
msg.msg_controllen = 0;
|
||
|
|
msg.msg_iocb = NULL;
|
||
|
|
|
||
|
|
flags = sr->msg_flags;
|
||
|
|
if (force_nonblock)
|
||
|
|
flags |= MSG_DONTWAIT;
|
||
|
|
if (flags & MSG_WAITALL)
|
||
|
|
min_ret = iov_iter_count(&msg.msg_iter);
|
||
|
|
|
||
|
|
ret = sock_recvmsg(sock, &msg, flags);
|
||
|
|
if (ret < min_ret) {
|
||
|
|
if (ret == -EAGAIN && force_nonblock)
|
||
|
|
return -EAGAIN;
|
||
|
|
if (ret == -ERESTARTSYS)
|
||
|
|
ret = -EINTR;
|
||
|
|
if (ret > 0 && io_net_retry(sock, flags)) {
|
||
|
|
sr->len -= ret;
|
||
|
|
sr->buf += ret;
|
||
|
|
sr->done_io += ret;
|
||
|
|
req->flags |= REQ_F_PARTIAL_IO;
|
||
|
|
return -EAGAIN;
|
||
|
|
}
|
||
|
|
req_set_fail(req);
|
||
|
|
} else if ((flags & MSG_WAITALL) && (msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))) {
|
||
|
|
out_free:
|
||
|
|
req_set_fail(req);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret >= 0)
|
||
|
|
ret += sr->done_io;
|
||
|
|
else if (sr->done_io)
|
||
|
|
ret = sr->done_io;
|
||
|
|
cflags = io_put_kbuf(req, issue_flags);
|
||
|
|
if (msg.msg_inq)
|
||
|
|
cflags |= IORING_CQE_F_SOCK_NONEMPTY;
|
||
|
|
io_req_set_res(req, ret, cflags);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||
|
|
{
|
||
|
|
struct io_accept *accept = io_kiocb_to_cmd(req);
|
||
|
|
unsigned flags;
|
||
|
|
|
||
|
|
if (sqe->len || sqe->buf_index)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
accept->addr = u64_to_user_ptr(READ_ONCE(sqe->addr));
|
||
|
|
accept->addr_len = u64_to_user_ptr(READ_ONCE(sqe->addr2));
|
||
|
|
accept->flags = READ_ONCE(sqe->accept_flags);
|
||
|
|
accept->nofile = rlimit(RLIMIT_NOFILE);
|
||
|
|
flags = READ_ONCE(sqe->ioprio);
|
||
|
|
if (flags & ~IORING_ACCEPT_MULTISHOT)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
accept->file_slot = READ_ONCE(sqe->file_index);
|
||
|
|
if (accept->file_slot) {
|
||
|
|
if (accept->flags & SOCK_CLOEXEC)
|
||
|
|
return -EINVAL;
|
||
|
|
if (flags & IORING_ACCEPT_MULTISHOT &&
|
||
|
|
accept->file_slot != IORING_FILE_INDEX_ALLOC)
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
if (accept->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
|
||
|
|
return -EINVAL;
|
||
|
|
if (SOCK_NONBLOCK != O_NONBLOCK && (accept->flags & SOCK_NONBLOCK))
|
||
|
|
accept->flags = (accept->flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
|
||
|
|
if (flags & IORING_ACCEPT_MULTISHOT)
|
||
|
|
req->flags |= REQ_F_APOLL_MULTISHOT;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_accept(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_ring_ctx *ctx = req->ctx;
|
||
|
|
struct io_accept *accept = io_kiocb_to_cmd(req);
|
||
|
|
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
|
||
|
|
unsigned int file_flags = force_nonblock ? O_NONBLOCK : 0;
|
||
|
|
bool fixed = !!accept->file_slot;
|
||
|
|
struct file *file;
|
||
|
|
int ret, fd;
|
||
|
|
|
||
|
|
retry:
|
||
|
|
if (!fixed) {
|
||
|
|
fd = __get_unused_fd_flags(accept->flags, accept->nofile);
|
||
|
|
if (unlikely(fd < 0))
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
file = do_accept(req->file, file_flags, accept->addr, accept->addr_len,
|
||
|
|
accept->flags);
|
||
|
|
if (IS_ERR(file)) {
|
||
|
|
if (!fixed)
|
||
|
|
put_unused_fd(fd);
|
||
|
|
ret = PTR_ERR(file);
|
||
|
|
if (ret == -EAGAIN && force_nonblock) {
|
||
|
|
/*
|
||
|
|
* if it's multishot and polled, we don't need to
|
||
|
|
* return EAGAIN to arm the poll infra since it
|
||
|
|
* has already been done
|
||
|
|
*/
|
||
|
|
if ((req->flags & IO_APOLL_MULTI_POLLED) ==
|
||
|
|
IO_APOLL_MULTI_POLLED)
|
||
|
|
ret = IOU_ISSUE_SKIP_COMPLETE;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
if (ret == -ERESTARTSYS)
|
||
|
|
ret = -EINTR;
|
||
|
|
req_set_fail(req);
|
||
|
|
} else if (!fixed) {
|
||
|
|
fd_install(fd, file);
|
||
|
|
ret = fd;
|
||
|
|
} else {
|
||
|
|
ret = io_fixed_fd_install(req, issue_flags, file,
|
||
|
|
accept->file_slot);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(req->flags & REQ_F_APOLL_MULTISHOT)) {
|
||
|
|
io_req_set_res(req, ret, 0);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|
||
|
|
if (ret >= 0) {
|
||
|
|
bool filled;
|
||
|
|
|
||
|
|
spin_lock(&ctx->completion_lock);
|
||
|
|
filled = io_fill_cqe_aux(ctx, req->cqe.user_data, ret,
|
||
|
|
IORING_CQE_F_MORE);
|
||
|
|
io_commit_cqring(ctx);
|
||
|
|
spin_unlock(&ctx->completion_lock);
|
||
|
|
if (filled) {
|
||
|
|
io_cqring_ev_posted(ctx);
|
||
|
|
goto retry;
|
||
|
|
}
|
||
|
|
ret = -ECANCELED;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_socket_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||
|
|
{
|
||
|
|
struct io_socket *sock = io_kiocb_to_cmd(req);
|
||
|
|
|
||
|
|
if (sqe->addr || sqe->rw_flags || sqe->buf_index)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
sock->domain = READ_ONCE(sqe->fd);
|
||
|
|
sock->type = READ_ONCE(sqe->off);
|
||
|
|
sock->protocol = READ_ONCE(sqe->len);
|
||
|
|
sock->file_slot = READ_ONCE(sqe->file_index);
|
||
|
|
sock->nofile = rlimit(RLIMIT_NOFILE);
|
||
|
|
|
||
|
|
sock->flags = sock->type & ~SOCK_TYPE_MASK;
|
||
|
|
if (sock->file_slot && (sock->flags & SOCK_CLOEXEC))
|
||
|
|
return -EINVAL;
|
||
|
|
if (sock->flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
|
||
|
|
return -EINVAL;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_socket(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_socket *sock = io_kiocb_to_cmd(req);
|
||
|
|
bool fixed = !!sock->file_slot;
|
||
|
|
struct file *file;
|
||
|
|
int ret, fd;
|
||
|
|
|
||
|
|
if (!fixed) {
|
||
|
|
fd = __get_unused_fd_flags(sock->flags, sock->nofile);
|
||
|
|
if (unlikely(fd < 0))
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
file = __sys_socket_file(sock->domain, sock->type, sock->protocol);
|
||
|
|
if (IS_ERR(file)) {
|
||
|
|
if (!fixed)
|
||
|
|
put_unused_fd(fd);
|
||
|
|
ret = PTR_ERR(file);
|
||
|
|
if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK))
|
||
|
|
return -EAGAIN;
|
||
|
|
if (ret == -ERESTARTSYS)
|
||
|
|
ret = -EINTR;
|
||
|
|
req_set_fail(req);
|
||
|
|
} else if (!fixed) {
|
||
|
|
fd_install(fd, file);
|
||
|
|
ret = fd;
|
||
|
|
} else {
|
||
|
|
ret = io_fixed_fd_install(req, issue_flags, file,
|
||
|
|
sock->file_slot);
|
||
|
|
}
|
||
|
|
io_req_set_res(req, ret, 0);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_connect_prep_async(struct io_kiocb *req)
|
||
|
|
{
|
||
|
|
struct io_async_connect *io = req->async_data;
|
||
|
|
struct io_connect *conn = io_kiocb_to_cmd(req);
|
||
|
|
|
||
|
|
return move_addr_to_kernel(conn->addr, conn->addr_len, &io->address);
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
|
||
|
|
{
|
||
|
|
struct io_connect *conn = io_kiocb_to_cmd(req);
|
||
|
|
|
||
|
|
if (sqe->len || sqe->buf_index || sqe->rw_flags || sqe->splice_fd_in)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
conn->addr = u64_to_user_ptr(READ_ONCE(sqe->addr));
|
||
|
|
conn->addr_len = READ_ONCE(sqe->addr2);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int io_connect(struct io_kiocb *req, unsigned int issue_flags)
|
||
|
|
{
|
||
|
|
struct io_connect *connect = io_kiocb_to_cmd(req);
|
||
|
|
struct io_async_connect __io, *io;
|
||
|
|
unsigned file_flags;
|
||
|
|
int ret;
|
||
|
|
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
|
||
|
|
|
||
|
|
if (req_has_async_data(req)) {
|
||
|
|
io = req->async_data;
|
||
|
|
} else {
|
||
|
|
ret = move_addr_to_kernel(connect->addr,
|
||
|
|
connect->addr_len,
|
||
|
|
&__io.address);
|
||
|
|
if (ret)
|
||
|
|
goto out;
|
||
|
|
io = &__io;
|
||
|
|
}
|
||
|
|
|
||
|
|
file_flags = force_nonblock ? O_NONBLOCK : 0;
|
||
|
|
|
||
|
|
ret = __sys_connect_file(req->file, &io->address,
|
||
|
|
connect->addr_len, file_flags);
|
||
|
|
if ((ret == -EAGAIN || ret == -EINPROGRESS) && force_nonblock) {
|
||
|
|
if (req_has_async_data(req))
|
||
|
|
return -EAGAIN;
|
||
|
|
if (io_alloc_async_data(req)) {
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
memcpy(req->async_data, &__io, sizeof(__io));
|
||
|
|
return -EAGAIN;
|
||
|
|
}
|
||
|
|
if (ret == -ERESTARTSYS)
|
||
|
|
ret = -EINTR;
|
||
|
|
out:
|
||
|
|
if (ret < 0)
|
||
|
|
req_set_fail(req);
|
||
|
|
io_req_set_res(req, ret, 0);
|
||
|
|
return IOU_OK;
|
||
|
|
}
|
||
|
|
#endif
|