From patchwork Mon Apr 26 19:06:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Omar Sandoval X-Patchwork-Id: 12224925 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 57AD1C433ED for ; Mon, 26 Apr 2021 19:06:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D92C60E08 for ; Mon, 26 Apr 2021 19:06:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233704AbhDZTHG (ORCPT ); Mon, 26 Apr 2021 15:07:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239932AbhDZTHE (ORCPT ); Mon, 26 Apr 2021 15:07:04 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99243C061756 for ; Mon, 26 Apr 2021 12:06:21 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id s20so13626168plr.13 for ; Mon, 26 Apr 2021 12:06:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=osandov-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=OU5tybw4mESEMIXeoznpaz+xCHTTr+47vinGE0EXY4M=; b=Ajf2fir0E6Atcw05WsKjIq++A8IECg/TEJJLqY5CZGB/p8G56nbK7EHACvIuSHHlje IFbaYVfNd4NZQRmz5+xlPyH4Q/srfMpEuKx6JLSZN6620iK/xfCKN3NzCORMZc54OX8C YE09HV8G7nLuVzy0W+RccL91vYqQyOUH4I9Wntgwo3gVrTwf+IGVxb7sDPbdcTrcEDSU kvNcgxLy20Bf7N4NDKokOwEJDRpeFnfczZrei/dT0V9QU7vDTektqTRWpBGow+R8N30t jaCfK/o1Qv1NIu+RtcB5uPN8GIBocgS97RTak3WPnyx/Q5R6HXk/OSS7+pCg7eZxiZEd EYiQ== 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:mime-version :content-transfer-encoding; bh=OU5tybw4mESEMIXeoznpaz+xCHTTr+47vinGE0EXY4M=; b=Xlb9Me0AEAESDjgQ1SHPPoIMyPkhC1tnI+g1turcZLQuKfqpSXYBmlpEiTGGh6en2A Q8ImDVWeOa2oa08OaU+eNUJLjyZTbmzUMctKToLse9PJR0aWsJRYVpQFhDeN3LXRk08f yoTO8bD1AH3YNApozU+X5N+tSQw3Xb5t8FCxGNuWu/lVUBmlwZA0ryRVm0uFxEtrYRge j80lHLJQ3qVXvhIfqqbuPSK+eDEMqMw+0BdtvhNnIUsX45bachDFPdWQqT8tLpNZMkFF CG9ip+82+TTXaz8DtNsNXWxR2h4cv4SCi/nLE5Cb5RrMjRu5NXflleNSV71VzD6qfdx1 1O5Q== X-Gm-Message-State: AOAM530a/dElMrQR22HyKueiZjTgs7JooS977cd9ILJzo8+KJhlEkSyv BLZVUtX0jQJcvrmtzbZJaAvbLw== X-Google-Smtp-Source: ABdhPJzTuIQ9Xvd6pY2cEtm8mjBa+SVjlyfLTdikPyrQ7jjAYzg4iiNsdObHk0rdVLG1c//4wDuVVA== X-Received: by 2002:a17:902:b10d:b029:ec:b5c2:5724 with SMTP id q13-20020a170902b10db02900ecb5c25724mr20011000plr.2.1619463980887; Mon, 26 Apr 2021 12:06:20 -0700 (PDT) Received: from relinquished.tfbnw.net ([2620:10d:c090:400::5:f06a]) by smtp.gmail.com with ESMTPSA id lx11sm331745pjb.27.2021.04.26.12.06.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Apr 2021 12:06:20 -0700 (PDT) From: Omar Sandoval To: linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, Al Viro , Christoph Hellwig Cc: Linus Torvalds , Dave Chinner , Jann Horn , Amir Goldstein , Aleksa Sarai , linux-api@vger.kernel.org, kernel-team@fb.com Subject: [PATCH RESEND v9 0/9] fs: interface for directly reading/writing compressed data Date: Mon, 26 Apr 2021 12:06:03 -0700 Message-Id: X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Omar Sandoval This series adds an API for reading compressed data on a filesystem without decompressing it as well as support for writing compressed data directly to the filesystem. I have test cases (including fsstress support) and example programs which I'll send up once the dust settles [1]. The main use-case is Btrfs send/receive: currently, when sending data from one compressed filesystem to another, the sending side decompresses the data and the receiving side recompresses it before writing it out. This is wasteful and can be avoided if we can just send and write compressed extents. The patches implementing the send/receive support were sent with the last submission of this series [2]. Patches 1-3 add the VFS support, UAPI, and documentation. Patches 4-7 are Btrfs prep patches. Patch 8 adds Btrfs encoded read support and patch 9 adds Btrfs encoded write support. These patches are based on Dave Sterba's Btrfs misc-next branch [3], which is in turn currently based on v5.12-rc8. This is a resend of v9 [4], rebased on the latest kdave/misc-next branch. Omar Sandoval (9): iov_iter: add copy_struct_from_iter() fs: add O_ALLOW_ENCODED open flag fs: add RWF_ENCODED for reading/writing compressed data btrfs: don't advance offset for compressed bios in btrfs_csum_one_bio() btrfs: add ram_bytes and offset to btrfs_ordered_extent btrfs: support different disk extent size for delalloc btrfs: optionally extend i_size in cow_file_range_inline() btrfs: implement RWF_ENCODED reads btrfs: implement RWF_ENCODED writes 1: https://github.com/osandov/xfstests/tree/rwf-encoded 2: https://lore.kernel.org/linux-btrfs/cover.1615922753.git.osandov@fb.com/ 3: https://github.com/kdave/btrfs-devel/tree/misc-next 4: https://lore.kernel.org/linux-btrfs/cover.1617258892.git.osandov@fb.com/ Omar Sandoval (9): iov_iter: add copy_struct_from_iter() fs: add O_ALLOW_ENCODED open flag fs: add RWF_ENCODED for reading/writing compressed data btrfs: don't advance offset for compressed bios in btrfs_csum_one_bio() btrfs: add ram_bytes and offset to btrfs_ordered_extent btrfs: support different disk extent size for delalloc btrfs: optionally extend i_size in cow_file_range_inline() btrfs: implement RWF_ENCODED reads btrfs: implement RWF_ENCODED writes Documentation/filesystems/encoded_io.rst | 240 ++++++ Documentation/filesystems/index.rst | 1 + arch/alpha/include/uapi/asm/fcntl.h | 1 + arch/parisc/include/uapi/asm/fcntl.h | 1 + arch/sparc/include/uapi/asm/fcntl.h | 1 + fs/btrfs/compression.c | 12 +- fs/btrfs/compression.h | 6 +- fs/btrfs/ctree.h | 9 +- fs/btrfs/delalloc-space.c | 18 +- fs/btrfs/file-item.c | 35 +- fs/btrfs/file.c | 46 +- fs/btrfs/inode.c | 929 +++++++++++++++++++++-- fs/btrfs/ordered-data.c | 124 +-- fs/btrfs/ordered-data.h | 25 +- fs/btrfs/relocation.c | 4 +- fs/fcntl.c | 10 +- fs/namei.c | 4 + fs/read_write.c | 168 +++- include/linux/encoded_io.h | 17 + include/linux/fcntl.h | 2 +- include/linux/fs.h | 13 + include/linux/uio.h | 1 + include/uapi/asm-generic/fcntl.h | 4 + include/uapi/linux/encoded_io.h | 30 + include/uapi/linux/fs.h | 5 +- lib/iov_iter.c | 91 +++ 26 files changed, 1563 insertions(+), 234 deletions(-) create mode 100644 Documentation/filesystems/encoded_io.rst create mode 100644 include/linux/encoded_io.h create mode 100644 include/uapi/linux/encoded_io.h