From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5E846C43334 for ; Tue, 12 Jul 2022 20:55:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234313AbiGLUzL (ORCPT ); Tue, 12 Jul 2022 16:55:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232585AbiGLUye (ORCPT ); Tue, 12 Jul 2022 16:54:34 -0400 Received: from mail-wr1-x432.google.com (mail-wr1-x432.google.com [IPv6:2a00:1450:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BEBC71FD; Tue, 12 Jul 2022 13:53:32 -0700 (PDT) Received: by mail-wr1-x432.google.com with SMTP id bk26so12796144wrb.11; Tue, 12 Jul 2022 13:53:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Pw3xCF+IE0zNhMTl93PD4uOC8iaBTkE5EoQbu6T6UBI=; b=SJVWG8+ZpxKYt9//cbmEV1CwWTzVT6ePgkcZN6bT73VKRqsh7yfkwcjYi59+pLRbfV hUQiTkI/FvxUMLpxO/rXKB72qsIQ4Ic9V3Q4cBfH/S7Bu3OAQj1ZbSlzZU06O8qEFMAI wuTRp17yjQeNwVgZXpaJur8q7qRiaYa3n9xAZs8PZ2H8ikD1c5PFnGV4pbkGdVQ+ROfZ NO42tFrcoppZXzQvHC5mDV7OiYQrAEUyF+E9/crFsrE381Fb/Va/Ysut6DKBpeM/UPer 8DI9F/1c7YxT4hMdp0vR8zHDS1bqR7Sa6IMtBuXzHQ4VNH0cmBzG5sgQpuof3eA8Bbp+ n6qw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Pw3xCF+IE0zNhMTl93PD4uOC8iaBTkE5EoQbu6T6UBI=; b=p/e5vEvkTAdSjPJ9G7liWW2lV86kaiTxjWootG2uNLGI/dPLuVW+BWjdsXT8092FGv 15kMyKW0olUo43H1RFtDppRW+RPDkpThgD3LjXJpReSEcVqTAsU6e5nLso4Y2gBUuMQo swNT7kNBVdv6gIoTXx9Ur1bXrdihObEunLzqbrVZ4SL4GUBBy7biKn8t/6vfKsB7tAsC jUeWTtEyOMxtZONBhhWmscs10Q1UE1ksD53hcesxnTnfNlXsf62P8JwzHiLcQo4eHdDf 6OTOrynC2rKL0aEm09LdUHfqjP1wTOhsvbWUjDOykUtu8pVO5YqumpVkjxOb73YoBw8Y I4eg== X-Gm-Message-State: AJIora/j9dMb+yvzJ8VVEHva9mKwY2py71eQXvKr0b98O++EqaWq5BEM ct8UdtKsc24GQzlPA+AR51iQpomkffY= X-Google-Smtp-Source: AGRyM1sgaP0mGniZtsIizQQ/BZ406MWmZevgqCljJnKhPDUYmuViayCwwRPDuujhrswvmUBsp7DoVQ== X-Received: by 2002:a5d:5c05:0:b0:21d:83b4:d339 with SMTP id cc5-20020a5d5c05000000b0021d83b4d339mr23673286wrb.611.1657659210420; Tue, 12 Jul 2022 13:53:30 -0700 (PDT) Received: from 127.0.0.1localhost (188.28.125.106.threembb.co.uk. [188.28.125.106]) by smtp.gmail.com with ESMTPSA id c14-20020a7bc00e000000b003a044fe7fe7sm89833wmb.9.2022.07.12.13.53.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Jul 2022 13:53:30 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: "David S . Miller" , Jakub Kicinski , Jonathan Lemon , Willem de Bruijn , Jens Axboe , David Ahern , kernel-team@fb.com, Pavel Begunkov Subject: [PATCH net-next v5 19/27] io_uring: wire send zc request type Date: Tue, 12 Jul 2022 21:52:43 +0100 Message-Id: X-Mailer: git-send-email 2.37.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Add a new io_uring opcode IORING_OP_SENDZC. The main distinction from IORING_OP_SEND is that the user should specify a notification slot index in sqe::notification_idx and the buffers are safe to reuse only when the used notification is flushed and completes. Signed-off-by: Pavel Begunkov --- include/uapi/linux/io_uring.h | 5 ++ io_uring/net.c | 94 +++++++++++++++++++++++++++++++++++ io_uring/net.h | 4 ++ io_uring/opdef.c | 15 ++++++ 4 files changed, 118 insertions(+) diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index f1ba8e934168..dcef9d6e7f78 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -63,6 +63,10 @@ struct io_uring_sqe { union { __s32 splice_fd_in; __u32 file_index; + struct { + __u16 notification_idx; + __u16 __pad; + }; }; union { struct { @@ -194,6 +198,7 @@ enum io_uring_op { IORING_OP_GETXATTR, IORING_OP_SOCKET, IORING_OP_URING_CMD, + IORING_OP_SENDZC_NOTIF, /* this goes last, obviously */ IORING_OP_LAST, diff --git a/io_uring/net.c b/io_uring/net.c index 2dd61fcf91d8..399267e8f1ef 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -13,6 +13,7 @@ #include "io_uring.h" #include "kbuf.h" #include "net.h" +#include "notif.h" #if defined(CONFIG_NET) struct io_shutdown { @@ -58,6 +59,15 @@ struct io_sr_msg { unsigned int flags; }; +struct io_sendzc { + struct file *file; + void __user *buf; + size_t len; + u16 slot_idx; + unsigned msg_flags; + unsigned 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) @@ -652,6 +662,90 @@ int io_recv(struct io_kiocb *req, unsigned int issue_flags) return ret; } +int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) +{ + struct io_sendzc *zc = io_kiocb_to_cmd(req); + + if (READ_ONCE(sqe->addr2) || READ_ONCE(sqe->__pad2[0]) || + READ_ONCE(sqe->addr3)) + return -EINVAL; + + zc->flags = READ_ONCE(sqe->ioprio); + if (zc->flags & ~IORING_RECVSEND_POLL_FIRST) + return -EINVAL; + + zc->buf = u64_to_user_ptr(READ_ONCE(sqe->addr)); + zc->len = READ_ONCE(sqe->len); + zc->msg_flags = READ_ONCE(sqe->msg_flags) | MSG_NOSIGNAL; + zc->slot_idx = READ_ONCE(sqe->notification_idx); + if (zc->msg_flags & MSG_DONTWAIT) + req->flags |= REQ_F_NOWAIT; +#ifdef CONFIG_COMPAT + if (req->ctx->compat) + zc->msg_flags |= MSG_CMSG_COMPAT; +#endif + return 0; +} + +int io_sendzc(struct io_kiocb *req, unsigned int issue_flags) +{ + struct io_ring_ctx *ctx = req->ctx; + struct io_sendzc *zc = io_kiocb_to_cmd(req); + struct io_notif_slot *notif_slot; + struct io_notif *notif; + struct msghdr msg; + struct iovec iov; + struct socket *sock; + unsigned msg_flags; + int ret, min_ret = 0; + + if (!(req->flags & REQ_F_POLLED) && + (zc->flags & IORING_RECVSEND_POLL_FIRST)) + return -EAGAIN; + + if (issue_flags & IO_URING_F_UNLOCKED) + return -EAGAIN; + sock = sock_from_file(req->file); + if (unlikely(!sock)) + return -ENOTSOCK; + + notif_slot = io_get_notif_slot(ctx, zc->slot_idx); + if (!notif_slot) + return -EINVAL; + notif = io_get_notif(ctx, notif_slot); + if (!notif) + return -ENOMEM; + + msg.msg_name = NULL; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_namelen = 0; + + ret = import_single_range(WRITE, zc->buf, zc->len, &iov, &msg.msg_iter); + if (unlikely(ret)) + return ret; + + msg_flags = zc->msg_flags | MSG_ZEROCOPY; + if (issue_flags & IO_URING_F_NONBLOCK) + msg_flags |= MSG_DONTWAIT; + if (msg_flags & MSG_WAITALL) + min_ret = iov_iter_count(&msg.msg_iter); + + msg.msg_flags = msg_flags; + msg.msg_ubuf = ¬if->uarg; + msg.sg_from_iter = NULL; + ret = sock_sendmsg(sock, &msg); + + if (unlikely(ret < min_ret)) { + if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK)) + return -EAGAIN; + return ret == -ERESTARTSYS ? -EINTR : ret; + } + + io_req_set_res(req, ret, 0); + 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); diff --git a/io_uring/net.h b/io_uring/net.h index 81d71d164770..1dba8befebb3 100644 --- a/io_uring/net.h +++ b/io_uring/net.h @@ -40,4 +40,8 @@ int io_socket(struct io_kiocb *req, unsigned int issue_flags); int io_connect_prep_async(struct io_kiocb *req); int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); int io_connect(struct io_kiocb *req, unsigned int issue_flags); + +int io_sendzc(struct io_kiocb *req, unsigned int issue_flags); +int io_sendzc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); + #endif diff --git a/io_uring/opdef.c b/io_uring/opdef.c index a7b84b43e6c2..7ab19bbf3126 100644 --- a/io_uring/opdef.c +++ b/io_uring/opdef.c @@ -470,6 +470,21 @@ const struct io_op_def io_op_defs[] = { .issue = io_uring_cmd, .prep_async = io_uring_cmd_prep_async, }, + [IORING_OP_SENDZC_NOTIF] = { + .name = "SENDZC_NOTIF", + .needs_file = 1, + .unbound_nonreg_file = 1, + .pollout = 1, + .audit_skip = 1, + .ioprio = 1, +#if defined(CONFIG_NET) + .prep = io_sendzc_prep, + .issue = io_sendzc, +#else + .prep = io_eopnotsupp_prep, +#endif + + }, }; const char *io_uring_get_opcode(u8 opcode) -- 2.37.0