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=-11.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SIGNED_OFF_BY,SPF_HELO_NONE,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 8B506C7618B for ; Thu, 25 Jul 2019 09:57:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3FB6D2190F for ; Thu, 25 Jul 2019 09:57:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388222AbfGYJ5T (ORCPT ); Thu, 25 Jul 2019 05:57:19 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:51908 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725808AbfGYJ5T (ORCPT ); Thu, 25 Jul 2019 05:57:19 -0400 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 72E117B883A4FDD5225D; Thu, 25 Jul 2019 17:57:16 +0800 (CST) Received: from architecture4.huawei.com (10.140.130.215) by smtp.huawei.com (10.3.19.210) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 25 Jul 2019 17:57:10 +0800 From: Gao Xiang To: Alexander Viro , Greg Kroah-Hartman , Andrew Morton , Stephen Rothwell , Theodore Ts'o , "David Sterba" , Amir Goldstein , Linus Torvalds CC: , , LKML , , Chao Yu , Miao Xie , Li Guifu , Fang Wei , Gao Xiang Subject: [PATCH v4 00/24] erofs: promote erofs from staging Date: Thu, 25 Jul 2019 17:56:34 +0800 Message-ID: <20190725095658.155779-1-gaoxiang25@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.140.130.215] X-CFilter-Loop: Reflected Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Changelog from v3: o use GPL-2.0-only for SPDX-License-Identifier suggested by Stephen; o kill all kconfig cache strategies and turn them into mount options "cache_strategy={disable|readahead|readaround}" suggested by Ted. As the first step, cached pages can still be usable after cache is disabled by remounting, and these pages will be fallen out over time, which can be refined in the later version if some requirement is needed. Update related document as well; o turn on CONFIG_EROFS_FS_SECURITY by default suggested by David; o kill CONFIG_EROFS_FS_IO_MAX_RETRIES and fold it into code; turn EROFS_FS_USE_VM_MAP_RAM into a module parameter ("use_vmap") suggested by David. Changelog from v2: o kill sbi->dev_name and clean up all failure handling in fill_super() suggested by Al. Note that the initialzation of managed_cache is now moved after s_root is assigned since it's more preferred to iput() in .put_super() and all inodes should be evicted before the end of generic_shutdown_super(sb); o fold in the following staging patches (and thanks): staging: erofs:converting all 'unsigned' to 'unsigned int' staging: erofs: Remove function erofs_kill_sb() - However it was revoked due to erofs_kill_sb reused... staging: erofs: avoid opened loop codes staging: erofs: support bmap o move EROFS_SUPER_MAGIC_V1 from linux/fs/erofs/erofs_fs.h to include/uapi/linux/magic.h for userspace utilities. This patchset is slightly different from what it is in the staging tree since I move/rename compression/shrinker stuffes and do more cleanup in patchset v2 for better review. It can also be found in git at tag "erofs_2019-07-25" at: https://git.kernel.org/pub/scm/linux/kernel/git/xiang/linux.git/ The latest fs code is also available at: https://git.kernel.org/pub/scm/linux/kernel/git/xiang/linux.git/tree/fs/erofs?h=erofs-outofstaging Changelog from v1: o resend the whole filesystem into a patchset suggested by Greg; o code is more cleaner, especially for decompression frontend. --8<---------- Hi, EROFS file system has been in Linux-staging for about a year. It has been proved to be stable enough to move out of staging by 10+ millions of HUAWEI Android mobile phones on the market from EMUI 9.0.1, and it was promoted as one of the key features of EMUI 9.1 [1], including P30(pro). EROFS is a read-only file system designed to save extra storage space with guaranteed end-to-end performance by applying fixed-size output compression, inplace I/O and decompression inplace technologies [2] to Linux filesystem. In our observation, EROFS is one of the fastest Linux compression filesystem using buffered I/O in the world. It will support direct I/O in the future if needed. EROFS even has better read performance in a large CR range compared with generic uncompressed file systems with proper CPU-storage combination, which is a reason why EROFS can be landed to speed up mobile phone performance, and which can be probably used for other use cases such as LiveCD and Docker image as well. Currently EROFS supports 4k LZ4 fixed-size output compression since LZ4 is the fastest widely-used decompression solution in the world and 4k leads to unnoticable read amplification for the worst case. More compression algorithms and cluster sizes could be added later, which depends on the real requirement. More information about EROFS itself are available at: Documentation/filesystems/erofs.txt https://kccncosschn19eng.sched.com/event/Nru2/erofs-an-introduction-and-our-smartphone-practice-xiang-gao-huawei erofs-utils (mainly mkfs.erofs now) is available at git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs-utils.git Preliminary iomap support has been pending in EROFS mailing list by Chao Yu. The key issue is that current iomap doesn't support tail-end packing inline data yet, it should be resolved later. Thanks to many contributors in the last year, the code is more clean and improved. We hope EROFS can be used in wider use cases so let's promote erofs out of staging and enhance it more actively. Kindly share comments about EROFS! We think EROFS is useful to community as a part of Linux upstream. Thank you very much, Gao Xiang [1] http://web.archive.org/web/20190627021241/https://consumer.huawei.com/en/emui/ [2] https://lore.kernel.org/lkml/20190624072258.28362-1-hsiangkao@aol.com/ Cc: Greg Kroah-Hartman Cc: Alexander Viro Cc: Andrew Morton Cc: Stephen Rothwell Cc: Theodore Ts'o Cc: David Sterba Cc: Amir Goldstein Cc: Chao Yu Cc: Miao Xie Cc: Li Guifu Cc: Fang Wei Signed-off-by: Gao Xiang Gao Xiang (24): erofs: add on-disk layout erofs: add erofs in-memory stuffs erofs: add super block operations erofs: add raw address_space operations erofs: add inode operations erofs: support special inode erofs: add directory operations erofs: add namei functions erofs: support tracepoint erofs: update Kconfig and Makefile erofs: introduce xattr & posixacl support erofs: introduce tagged pointer erofs: add compression indexes support erofs: introduce superblock registration erofs: introduce erofs shrinker erofs: introduce workstation for decompression erofs: introduce per-CPU buffers implementation erofs: introduce pagevec for decompression subsystem erofs: add erofs_allocpage() erofs: introduce generic decompression backend erofs: introduce LZ4 decompression inplace erofs: introduce the decompression frontend erofs: introduce cached decompression erofs: add document Documentation/filesystems/erofs.txt | 221 +++++ fs/Kconfig | 1 + fs/Makefile | 1 + fs/erofs/Kconfig | 98 ++ fs/erofs/Makefile | 11 + fs/erofs/compress.h | 62 ++ fs/erofs/data.c | 423 ++++++++ fs/erofs/decompressor.c | 359 +++++++ fs/erofs/dir.c | 147 +++ fs/erofs/erofs_fs.h | 316 ++++++ fs/erofs/inode.c | 326 +++++++ fs/erofs/internal.h | 565 +++++++++++ fs/erofs/namei.c | 250 +++++ fs/erofs/super.c | 605 ++++++++++++ fs/erofs/tagptr.h | 110 +++ fs/erofs/utils.c | 387 ++++++++ fs/erofs/xattr.c | 700 +++++++++++++ fs/erofs/xattr.h | 93 ++ fs/erofs/zdata.c | 1408 +++++++++++++++++++++++++++ fs/erofs/zdata.h | 195 ++++ fs/erofs/zmap.c | 462 +++++++++ fs/erofs/zpvec.h | 159 +++ include/trace/events/erofs.h | 256 +++++ include/uapi/linux/magic.h | 1 + 24 files changed, 7156 insertions(+) create mode 100644 Documentation/filesystems/erofs.txt create mode 100644 fs/erofs/Kconfig create mode 100644 fs/erofs/Makefile create mode 100644 fs/erofs/compress.h create mode 100644 fs/erofs/data.c create mode 100644 fs/erofs/decompressor.c create mode 100644 fs/erofs/dir.c create mode 100644 fs/erofs/erofs_fs.h create mode 100644 fs/erofs/inode.c create mode 100644 fs/erofs/internal.h create mode 100644 fs/erofs/namei.c create mode 100644 fs/erofs/super.c create mode 100644 fs/erofs/tagptr.h create mode 100644 fs/erofs/utils.c create mode 100644 fs/erofs/xattr.c create mode 100644 fs/erofs/xattr.h create mode 100644 fs/erofs/zdata.c create mode 100644 fs/erofs/zdata.h create mode 100644 fs/erofs/zmap.c create mode 100644 fs/erofs/zpvec.h create mode 100644 include/trace/events/erofs.h -- 2.17.1