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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8F3FC282CB for ; Fri, 8 Feb 2019 17:34:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AA536217D8 for ; Fri, 8 Feb 2019 17:34:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20150623.gappssmtp.com header.i=@kernel-dk.20150623.gappssmtp.com header.b="xcj+bFqj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727773AbfBHRes (ORCPT ); Fri, 8 Feb 2019 12:34:48 -0500 Received: from mail-it1-f195.google.com ([209.85.166.195]:35736 "EHLO mail-it1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727726AbfBHRer (ORCPT ); Fri, 8 Feb 2019 12:34:47 -0500 Received: by mail-it1-f195.google.com with SMTP id r6so10902217itk.0 for ; Fri, 08 Feb 2019 09:34:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=GApnfsa7c+mg+tc0yKqlcv3g9TPKkz7bCJNbZx5pt0A=; b=xcj+bFqjW0s1JR1Zs/398yokoDoLbdW5Lyx4owiDTrBmaRhw2U1VQyFZ5AUpKTo7UU SWA/3M0CnwWNfY3zsenP+glLgRpeoZ0otgra8ayOhgKxhqs5TQ723vm1wGw/TF8J2lQ7 VdRTz2s2WZhF28H84xyLqJta9loGvY7Ejj5sELXt/1g9IXTNVfPQQ4kzpgLehixnI84Z FH2u49+1BDIR8HikzIELG6Ps6wZvNHbZrPIZSv4VCJeeBmu5DPv8smNDhVLofsWPnfXJ K52QHOsGk99xkNbxjLbAO4cb9I3NqxqmLpFbomROJRzpSn6qV+YGnEyLH5dt/Y09Uczk xkYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=GApnfsa7c+mg+tc0yKqlcv3g9TPKkz7bCJNbZx5pt0A=; b=id0Sqsed/ZH+BtS4DvnlEypq9r3FNz7wDvGCDwPlkz8FICvSnYPIO4iQeNf0aRnBXU 1lns3nJbNHHew1AJOwPNsrwKc8qNwXls6M/kZuk2I/XX7nU0817PmeS/u2Lr0G1Qp1/5 6TWUVB2BMsp3MF5jttutq3hOSlOeE1ll/pLZTj6kiWTpcWkqzk7HMG4mTRfnVo/At82z s4ur8VqxrUUVrBnnnf8MmEQNTvun9RBFHRRUNzyB03zcb4y00E5n6uNI9bC3gTLBdMEG WwrlUBAAtWPwXOe/RT1Yg6qnSQUIhI4g6xfjENj5Z6KY7W8ayeLzaJWmpun+iVFLVfwW FYGQ== X-Gm-Message-State: AHQUAuaKZWzRxIGRvdye64PmVc+VX6mWq6SRwUGtwNdkhhfcZVz6w628 LUBn2Up1ByWAQ/v0sM6O4zH4f+G3VYHn+w== X-Google-Smtp-Source: AHgI3IYctximbItKyUBcCPUdJRnb/1kxjfhS/hN0mQe/lVZduXlZNgKjNJx6aHBRKGzBEHAzMUBNMA== X-Received: by 2002:a6b:8f48:: with SMTP id r69mr11936602iod.128.1549647286762; Fri, 08 Feb 2019 09:34:46 -0800 (PST) Received: from localhost.localdomain ([216.160.245.98]) by smtp.gmail.com with ESMTPSA id f142sm1522627itc.15.2019.02.08.09.34.45 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 08 Feb 2019 09:34:45 -0800 (PST) From: Jens Axboe To: linux-aio@kvack.org, linux-block@vger.kernel.org, linux-api@vger.kernel.org Cc: hch@lst.de, jmoyer@redhat.com, avi@scylladb.com, jannh@google.com, viro@ZenIV.linux.org.uk, Jens Axboe Subject: [PATCH 06/19] io_uring: add fsync support Date: Fri, 8 Feb 2019 10:34:10 -0700 Message-Id: <20190208173423.27014-7-axboe@kernel.dk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190208173423.27014-1-axboe@kernel.dk> References: <20190208173423.27014-1-axboe@kernel.dk> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Christoph Hellwig Add a new fsync opcode, which either syncs a range if one is passed, or the whole file if the offset and length fields are both cleared to zero. A flag is provided to use fdatasync semantics, that is only force out metadata which is required to retrieve the file data, but not others like metadata. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- fs/io_uring.c | 40 +++++++++++++++++++++++++++++++++++ include/uapi/linux/io_uring.h | 8 ++++++- 2 files changed, 47 insertions(+), 1 deletion(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 927d61ebecf3..6cdf11373304 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -4,6 +4,7 @@ * supporting fast/efficient IO. * * Copyright (C) 2018-2019 Jens Axboe + * Copyright (c) 2018-2019 Christoph Hellwig */ #include #include @@ -518,6 +519,42 @@ static int io_nop(struct io_kiocb *req, u64 user_data) return 0; } +static int io_fsync(struct io_kiocb *req, const struct io_uring_sqe *sqe, + bool force_nonblock) +{ + struct io_ring_ctx *ctx = req->ctx; + loff_t sqe_off = READ_ONCE(sqe->off); + loff_t sqe_len = READ_ONCE(sqe->len); + loff_t end = sqe_off + sqe_len; + unsigned fsync_flags; + struct file *file; + int ret, fd; + + /* fsync always requires a blocking context */ + if (force_nonblock) + return -EAGAIN; + + if (unlikely(sqe->addr || sqe->ioprio)) + return -EINVAL; + + fsync_flags = READ_ONCE(sqe->fsync_flags); + if (unlikely(fsync_flags & ~IORING_FSYNC_DATASYNC)) + return -EINVAL; + + fd = READ_ONCE(sqe->fd); + file = fget(fd); + if (unlikely(!file)) + return -EBADF; + + ret = vfs_fsync_range(file, sqe_off, end > 0 ? end : LLONG_MAX, + fsync_flags & IORING_FSYNC_DATASYNC); + + fput(file); + io_cqring_add_event(ctx, sqe->user_data, ret, 0); + io_free_req(req); + return 0; +} + static int __io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req, const struct sqe_submit *s, bool force_nonblock) { @@ -539,6 +576,9 @@ static int __io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req, case IORING_OP_WRITEV: ret = io_write(req, s, force_nonblock); break; + case IORING_OP_FSYNC: + ret = io_fsync(req, s->sqe, force_nonblock); + break; default: ret = -EINVAL; break; diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index ac692823d6f4..4589d56d0b68 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -24,7 +24,7 @@ struct io_uring_sqe { __u32 len; /* buffer size or number of iovecs */ union { __kernel_rwf_t rw_flags; - __u32 __resv; + __u32 fsync_flags; }; __u64 user_data; /* data to be passed back at completion time */ __u64 __pad2[3]; @@ -33,6 +33,12 @@ struct io_uring_sqe { #define IORING_OP_NOP 0 #define IORING_OP_READV 1 #define IORING_OP_WRITEV 2 +#define IORING_OP_FSYNC 3 + +/* + * sqe->fsync_flags + */ +#define IORING_FSYNC_DATASYNC (1U << 0) /* * IO completion data structure (Completion Queue Entry) -- 2.17.1