| // SPDX-License-Identifier: GPL-2.0 |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/file.h> |
| #include <linux/slab.h> |
| #include <linux/net.h> |
| #include <linux/compat.h> |
| #include <net/compat.h> |
| #include <linux/io_uring.h> |
| |
| #include <uapi/linux/io_uring.h> |
| |
| #include "io_uring_types.h" |
| #include "io_uring.h" |
| #include "net.h" |
| |
| #if defined(CONFIG_NET) |
| struct io_shutdown { |
| struct file *file; |
| int how; |
| }; |
| |
| struct io_accept { |
| struct file *file; |
| struct sockaddr __user *addr; |
| int __user *addr_len; |
| int flags; |
| u32 file_slot; |
| unsigned long nofile; |
| }; |
| |
| struct io_socket { |
| struct file *file; |
| int domain; |
| int type; |
| int protocol; |
| int flags; |
| u32 file_slot; |
| unsigned long nofile; |
| }; |
| |
| struct io_connect { |
| struct file *file; |
| struct sockaddr __user *addr; |
| int addr_len; |
| }; |
| |
| struct io_sr_msg { |
| struct file *file; |
| union { |
| struct compat_msghdr __user *umsg_compat; |
| struct user_msghdr __user *umsg; |
| void __user *buf; |
| }; |
| int msg_flags; |
| size_t len; |
| size_t done_io; |
| unsigned int flags; |
| }; |
| |
| #define IO_APOLL_MULTI_POLLED (REQ_F_APOLL_MULTISHOT | REQ_F_POLLED) |
| |
| int io_shutdown_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) |
| { |
| struct io_shutdown *shutdown = io_kiocb_to_cmd(req); |
| |
| if (unlikely(sqe->off || sqe->addr || sqe->rw_flags || |
| sqe->buf_index || sqe->splice_fd_in)) |
| return -EINVAL; |
| |
| shutdown->how = READ_ONCE(sqe->len); |
| return 0; |
| } |
| |
| int io_shutdown(struct io_kiocb *req, unsigned int issue_flags) |
| { |
| struct io_shutdown *shutdown = io_kiocb_to_cmd(req); |
| struct socket *sock; |
| int ret; |
| |
| if (issue_flags & IO_URING_F_NONBLOCK) |
| return -EAGAIN; |
| |
| sock = sock_from_file(req->file); |
| if (unlikely(!sock)) |
| return -ENOTSOCK; |
| |
| ret = __sys_shutdown_sock(sock, shutdown->how); |
| io_req_set_res(req, ret, 0); |
| return IOU_OK; |
| } |
| |
| static bool io_net_retry(struct socket *sock, int flags) |
| { |
| if (!(flags & MSG_WAITALL)) |
| return false; |
| return sock->type == SOCK_STREAM || sock->type == SOCK_SEQPACKET; |
| } |
| |
| static int io_setup_async_msg(struct io_kiocb *req, |
| struct io_async_msghdr *kmsg) |
| { |
| struct io_async_msghdr *async_msg = req->async_data; |
| |
| if (async_msg) |
| return -EAGAIN; |
| if (io_alloc_async_data(req)) { |
| kfree(kmsg->free_iov); |
| return -ENOMEM; |
| } |
| async_msg = req->async_data; |
| req->flags |= REQ_F_NEED_CLEANUP; |
| memcpy(async_msg, kmsg, sizeof(*kmsg)); |
| async_msg->msg.msg_name = &async_msg->addr; |
| /* if were using fast_iov, set it to the new one */ |
| if (!async_msg->free_iov) |
| async_msg->msg.msg_iter.iov = async_msg->fast_iov; |
| |
| return -EAGAIN; |
| } |
| |
| static int io_sendmsg_copy_hdr(struct io_kiocb *req, |
| struct io_async_msghdr *iomsg) |
| { |
| struct io_sr_msg *sr = io_kiocb_to_cmd(req); |
| |
| iomsg->msg.msg_name = &iomsg->addr; |
| iomsg->free_iov = iomsg->fast_iov; |
| return sendmsg_copy_msghdr(&iomsg->msg, sr->umsg, sr->msg_flags, |
| &iomsg->free_iov); |
| } |
| |
| int io_sendmsg_prep_async(struct io_kiocb *req) |
| { |
| int ret; |
| |
| ret = io_sendmsg_copy_hdr(req, req->async_data); |
| if (!ret) |
| req->flags |= REQ_F_NEED_CLEANUP; |
| return ret; |
| } |
| |
| void io_sendmsg_recvmsg_cleanup(struct io_kiocb *req) |
| { |
| struct io_async_msghdr *io = req->async_data; |
| |
| kfree(io->free_iov); |
| } |
| |
| int io_sendmsg_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; |
| |
| #ifdef CONFIG_COMPAT |
| if (req->ctx->compat) |
| sr->msg_flags |= MSG_CMSG_COMPAT; |
| #endif |
| sr->done_io = 0; |
| return 0; |
| } |
| |
| int io_sendmsg(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 flags; |
| int min_ret = 0; |
| int ret; |
| |
| sock = sock_from_file(req->file); |
| if (unlikely(!sock)) |
| return -ENOTSOCK; |
| |
| if (req_has_async_data(req)) { |
| kmsg = req->async_data; |
| } else { |
| ret = io_sendmsg_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); |
| |
| flags = sr->msg_flags; |
| if (issue_flags & IO_URING_F_NONBLOCK) |
| flags |= MSG_DONTWAIT; |
| if (flags & MSG_WAITALL) |
| min_ret = iov_iter_count(&kmsg->msg.msg_iter); |
| |
| ret = __sys_sendmsg_sock(sock, &kmsg->msg, flags); |
| |
| if (ret < min_ret) { |
| if (ret == -EAGAIN && (issue_flags & IO_URING_F_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); |
| } |
| /* 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; |
| io_req_set_res(req, ret, 0); |
| return IOU_OK; |
| } |
| |
| int io_send(struct io_kiocb *req, unsigned int issue_flags) |
| { |
| struct io_sr_msg *sr = io_kiocb_to_cmd(req); |
| struct msghdr msg; |
| struct iovec iov; |
| struct socket *sock; |
| unsigned flags; |
| int min_ret = 0; |
| int ret; |
| |
| 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; |
| |
| ret = import_single_range(WRITE, sr->buf, sr->len, &iov, &msg.msg_iter); |
| if (unlikely(ret)) |
| return ret; |
| |
| msg.msg_name = NULL; |
| msg.msg_control = NULL; |
| msg.msg_controllen = 0; |
| msg.msg_namelen = 0; |
| |
| flags = sr->msg_flags; |
| if (issue_flags & IO_URING_F_NONBLOCK) |
| flags |= MSG_DONTWAIT; |
| if (flags & MSG_WAITALL) |
| min_ret = iov_iter_count(&msg.msg_iter); |
| |
| msg.msg_flags = flags; |
| ret = sock_sendmsg(sock, &msg); |
| if (ret < min_ret) { |
| if (ret == -EAGAIN && (issue_flags & IO_URING_F_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); |
| } |
| if (ret >= 0) |
| ret += sr->done_io; |
| else if (sr->done_io) |
| ret = sr->done_io; |
| io_req_set_res(req, ret, 0); |
| return IOU_OK; |
| } |
| |
| static int __io_recvmsg_copy_hdr(struct io_kiocb *req, |
| struct io_async_msghdr *iomsg) |
| { |
| struct io_sr_msg *sr = io_kiocb_to_cmd(req); |
| struct iovec __user *uiov; |
| size_t iov_len; |
| int ret; |
| |
| ret = __copy_msghdr_from_user(&iomsg->msg, sr->umsg, |
| &iomsg->uaddr, &uiov, &iov_len); |
| if (ret) |
| return ret; |
| |
| if (req->flags & REQ_F_BUFFER_SELECT) { |
| if (iov_len > 1) |
| return -EINVAL; |
| if (copy_from_user(iomsg->fast_iov, uiov, sizeof(*uiov))) |
| return -EFAULT; |
| sr->len = iomsg->fast_iov[0].iov_len; |
| iomsg->free_iov = NULL; |
| } else { |
| iomsg->free_iov = iomsg->fast_iov; |
| ret = __import_iovec(READ, uiov, iov_len, UIO_FASTIOV, |
| &iomsg->free_iov, &iomsg->msg.msg_iter, |
| false); |
| if (ret > 0) |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| #ifdef CONFIG_COMPAT |
| static int __io_compat_recvmsg_copy_hdr(struct io_kiocb *req, |
| struct io_async_msghdr *iomsg) |
| { |
| struct io_sr_msg *sr = io_kiocb_to_cmd(req); |
| struct compat_iovec __user *uiov; |
| compat_uptr_t ptr; |
| compat_size_t len; |
| int ret; |
| |
| ret = __get_compat_msghdr(&iomsg->msg, sr->umsg_compat, &iomsg->uaddr, |
| &ptr, &len); |
| if (ret) |
| return ret; |
| |
| uiov = compat_ptr(ptr); |
| if (req->flags & REQ_F_BUFFER_SELECT) { |
| compat_ssize_t clen; |
| |
| if (len > 1) |
| return -EINVAL; |
| if (!access_ok(uiov, sizeof(*uiov))) |
| return -EFAULT; |
| if (__get_user(clen, &uiov->iov_len)) |
| return -EFAULT; |
| if (clen < 0) |
| return -EINVAL; |
| sr->len = clen; |
| iomsg->free_iov = NULL; |
| } else { |
| iomsg->free_iov = iomsg->fast_iov; |
| ret = __import_iovec(READ, (struct iovec __user *)uiov, len, |
| UIO_FASTIOV, &iomsg->free_iov, |
| &iomsg->msg.msg_iter, true); |
| if (ret < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| static int io_recvmsg_copy_hdr(struct io_kiocb *req, |
| struct io_async_msghdr *iomsg) |
| { |
| iomsg->msg.msg_name = &iomsg->addr; |
| |
| #ifdef CONFIG_COMPAT |
| if (req->ctx->compat) |
| return __io_compat_recvmsg_copy_hdr(req, iomsg); |
| #endif |
| |
| 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 |