Changes in Makefile

52118743 - f2fs: separate out iostat feature

Fri, 20 Aug 2021 03:52:28 +0000

f2fs: separate out iostat featureAdded F2FS_IOSTAT config option to support getting IO statistics throughsysfs and printing out periodic IO statistics tracepoint events andmoved I/O statistics related codes into separate files for bettermaintenance.Signed-off-by: Daeho Jeong Reviewed-by: Chao Yu [Jaegeuk Kim: set default=y]Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

d5f7bc00 - f2fs: deprecate f2fs_trace_io

Thu, 14 Jan 2021 21:59:09 +0000

f2fs: deprecate f2fs_trace_ioThis patch deprecates f2fs_trace_io, since f2fs uses page->private more broadly,resulting in more buggy cases.Acked-by: Chao Yu Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

4c8ff709 - f2fs: support data compression

Fri, 01 Nov 2019 10:07:14 +0000

f2fs: support data compressionThis patch tries to support compression in f2fs.- New term named cluster is defined as basic unit of compression, file canbe divided into multiple clusters logically. One cluster includes 4 << n(n >= 0) logical pages, compression size is also cluster size, each ofcluster can be compressed or not.- In cluster metadata layout, one special flag is used to indicate clusteris compressed one or normal one, for compressed cluster, following metadatamaps cluster to [1, 4 << n - 1] physical blocks, in where f2fs storesdata including compress header and compressed data.- In order to eliminate write amplification during overwrite, F2FS onlysupport compression on write-once file, data can be compressed only whenall logical blocks in file are valid and cluster compress ratio is lowerthan specified threshold.- To enable compression on regular inode, there are three ways:* chattr +c file* chattr +c dir; touch dir/file* mount w/ -o compress_extension=ext; touch file.extCompress metadata layout: [Dnode Structure] +-----------------------------------------------+ | cluster 1 | cluster 2 | ......... | cluster N | +-----------------------------------------------+ . . . . . . . . . Compressed Cluster . . Normal Cluster .+----------+---------+---------+---------+ +---------+---------+---------+---------+|compr flag| block 1 | block 2 | block 3 | | block 1 | block 2 | block 3 | block 4 |+----------+---------+---------+---------+ +---------+---------+---------+---------+ . . . . . . +-------------+-------------+----------+----------------------------+ | data length | data chksum | reserved | compressed data | +-------------+-------------+----------+----------------------------+Changelog:20190326:- fix error handling of read_end_io().- remove unneeded comments in f2fs_encrypt_one_page().20190327:- fix wrong use of f2fs_cluster_is_full() in f2fs_mpage_readpages().- don't jump into loop directly to avoid uninitialized variables.- add TODO tag in error path of f2fs_write_cache_pages().20190328:- fix wrong merge condition in f2fs_read_multi_pages().- check compressed file in f2fs_post_read_required().20190401- allow overwrite on non-compressed cluster.- check cluster meta before writing compressed data.20190402- don't preallocate blocks for compressed file.- add lz4 compress algorithm- process multiple post read works in one workqueue Now f2fs supports processing post read work in multiple workqueue, it shows low performance due to schedule overhead of multiple workqueue executing orderly.20190921- compress: support buffered overwriteC: compress cluster flagV: valid block addressN: NEW_ADDROne cluster contain 4 blocks before overwrite after overwrite- VVVV -> CVNN- CVNN -> VVVV- CVNN -> CVNN- CVNN -> CVVV- CVVV -> CVNN- CVVV -> CVVV20191029- add kconfig F2FS_FS_COMPRESSION to isolate compression relatedcodes, add kconfig F2FS_FS_{LZO,LZ4} to cover backend algorithm.note that: will remove lzo backend if Jaegeuk agreed that too.- update codes according to Eric's comments.20191101- apply fixes from Jaegeuk20191113- apply fixes from Jaegeuk- split workqueue for fsverity20191216- apply fixes from Jaegeuk20200117- fix to avoid NULL pointer dereference[Jaegeuk Kim]- add tracepoint for f2fs_{,de}compress_pages()- fix many bugs and add some compression stats- fix overwrite/mmap bugs- address 32bit build error, reported by Geert.- bug fixes when handling errors and i_compressed_blocksReported-by: Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

95ae251f - f2fs: add fs-verity support

Mon, 22 Jul 2019 16:26:24 +0000

f2fs: add fs-verity supportAdd fs-verity support to f2fs. fs-verity is a filesystem feature thatenables transparent integrity protection and authentication of read-onlyfiles. It uses a dm-verity like mechanism at the file level: a Merkletree is used to verify any block in the file in log(filesize) time. Itis implemented mainly by helper functions in fs/verity/. SeeDocumentation/filesystems/fsverity.rst for the full documentation.The f2fs support for fs-verity consists of:- Adding a filesystem feature flag and an inode flag for fs-verity.- Implementing the fsverity_operations to support enabling verity on an inode and reading/writing the verity metadata.- Updating ->readpages() to verify data as it's read from verity files and to support reading verity metadata pages.- Updating ->write_begin(), ->write_end(), and ->writepages() to support writing verity metadata pages.- Calling the fs-verity hooks for ->open(), ->setattr(), and ->ioctl().Like ext4, f2fs stores the verity metadata (Merkle tree andfsverity_descriptor) past the end of the file, starting at the first 64Kboundary beyond i_size. This approach works because (a) verity filesare readonly, and (b) pages fully beyond i_size aren't visible touserspace but can be read/written internally by f2fs with only somerelatively small changes to f2fs. Extended attributes cannot be usedbecause (a) f2fs limits the total size of an inode's xattr entries to4096 bytes, which wouldn't be enough for even a single Merkle treeblock, and (b) f2fs encryption doesn't encrypt xattrs, yet the veritymetadata *must* be encrypted when the file is because it contains hashesof the plaintext data.Acked-by: Jaegeuk Kim Acked-by: Chao Yu Signed-off-by: Eric Biggers List of files: /linux-6.15/fs/f2fs/Makefile

b2441318 - License cleanup: add SPDX GPL-2.0 license identifier to files with no license

Wed, 01 Nov 2017 14:07:57 +0000

License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseMany source files in the tree are missing licensing information, whichmakes it harder for compliance tools to determine the correct license.By default all files without license information are under the defaultlicense of the kernel, which is GPL version 2.Update the files which contain no license information with the 'GPL-2.0'SPDX license identifier. The SPDX identifier is a legally bindingshorthand, which can be used instead of the full boiler plate text.This patch is based on work done by Thomas Gleixner and Kate Stewart andPhilippe Ombredanne.How this work was done:Patches were generated and checked against linux-4.14-rc6 for a subset ofthe use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information,Further patches will be generated in subsequent months to fix up caseswhere non-standard license headers were used, and references to licensehad to be inferred by heuristics based on keywords.The analysis to determine which SPDX License Identifier to be applied toa file was done in a spreadsheet of side by side results from of theoutput of two independent scanners (ScanCode & Windriver) producing SPDXtag:value files created by Philippe Ombredanne. Philippe prepared thebase worksheet, and did an initial spot review of a few 1000 files.The 4.13 kernel was the starting point of the analysis with 60,537 filesassessed. Kate Stewart did a file by file comparison of the scannerresults in the spreadsheet to determine which SPDX license identifier(s)to be applied to the file. She confirmed any determination that was notimmediately clear with lawyers working with the Linux Foundation.Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines).All documentation files were explicitly excluded.The following heuristics were used to determine which SPDX licenseidentifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time.In total, over 70 hours of logged manual review was done on thespreadsheet to determine the SPDX license identifiers to apply to thesource files by Kate, Philippe, Thomas and, in some cases, confirmationby lawyers working with the Linux Foundation.Kate also obtained a third independent scan of the 4.13 code base fromFOSSology, and compared selected files where the other two scannersdisagreed against that SPDX file, to see if there was new insights. TheWindriver scanner is based on an older version of FOSSology in part, sothey are related.Thomas did random spot checks in about 500 files from the spreadsheetsfor the uapi headers and agreed with SPDX license identifier in thefiles he inspected. For the non-uapi files Thomas did random spot checksin about 15000 files.In initial set of patches against 4.14-rc6, 3 files were found to havecopy/paste license identifier errors, and have been fixed to reflect thecorrect identifier.Additionally Philippe spent 10 hours this week doing a detailed manualinspection and review of the 12,461 patched files from the initial patchversion early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correctThis produced a worksheet with 20 files needing minor correction. Thisworksheet was then exported into 3 different .csv files for thedifferent types of files to be modified.These .csv files were then reviewed by Greg. Thomas wrote a script toparse the csv files and add the proper SPDX tag to the file, in theformat that the file expected. This script was further refined by Gregbased on the output to detect more types of files automatically and todistinguish between header and source .c files (which need differentcomment types.) Finally Greg ran the script using the .csv files togenerate the patches.Reviewed-by: Kate Stewart Reviewed-by: Philippe Ombredanne Reviewed-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/fs/f2fs/Makefile

8ceffcb2 - f2fs: move sysfs code from super.c to fs/f2fs/sysfs.c

Wed, 14 Jun 2017 09:39:47 +0000

f2fs: move sysfs code from super.c to fs/f2fs/sysfs.cCodes related to sysfs and procfs are dispersive and mixed with sbrelated codes, but actually these codes are independent from others,so split them from super.c, and reorgnize and manger them in sysfs.c.Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

0b81d077 - fs crypto: move per-file encryption from f2fs tree to fs/crypto

Fri, 15 May 2015 23:26:10 +0000

fs crypto: move per-file encryption from f2fs tree to fs/cryptoThis patch adds the renamed functions moved from the f2fs crypto files.1. definitions for per-file encryption used by ext4 and f2fs.2. crypto.c for encrypt/decrypt functions a. IO preparation: - fscrypt_get_ctx / fscrypt_release_ctx b. before IOs: - fscrypt_encrypt_page - fscrypt_decrypt_page - fscrypt_zeroout_range c. after IOs: - fscrypt_decrypt_bio_pages - fscrypt_pullback_bio_page - fscrypt_restore_control_page3. policy.c supporting context management. a. For ioctls: - fscrypt_process_policy - fscrypt_get_policy b. For context permission - fscrypt_has_permitted_context - fscrypt_inherit_context4. keyinfo.c to handle permissions - fscrypt_get_encryption_info - fscrypt_free_encryption_info5. fname.c to support filename encryption a. general wrapper functions - fscrypt_fname_disk_to_usr - fscrypt_fname_usr_to_disk - fscrypt_setup_filename - fscrypt_free_filename b. specific filename handling functions - fscrypt_fname_alloc_buffer - fscrypt_fname_free_buffer6. Makefile and KconfigCc: Al Viro Signed-off-by: Michael Halcrow Signed-off-by: Ildar Muslukhov Signed-off-by: Uday Savagaonkar Signed-off-by: Theodore Ts'o Signed-off-by: Arnd Bergmann Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

a28ef1f5 - f2fs: maintain extent cache in separated file

Wed, 08 Jul 2015 09:59:36 +0000

f2fs: maintain extent cache in separated fileThis patch moves extent cache related code from data.c into extent_cache.csince extent cache is independent feature, and its codes are not relate toothers in data.c, it's better for us to maintain them in separated place.There is no functionality change, but several small coding style fixesincluding:* rename __drop_largest_extent to f2fs_drop_largest_extent for exporting;* rename misspelled word 'untill' to 'until';* remove unneeded 'return' in the end of f2fs_destroy_extent_tree().Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

2658e50d - f2fs: introduce a shrinker for mounted fs

Fri, 19 Jun 2015 19:01:21 +0000

f2fs: introduce a shrinker for mounted fsThis patch introduces a shrinker targeting to reduce memory footprint consumedby a number of in-memory f2fs data structures.In addition, it newly adds: - sbi->umount_mutex to avoid data races on shrinker and put_super - sbi->shruinker_run_no to not revisit objectsNote that the basic implementation was copied from fs/ubifs/shrinker.cReviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

6b3bd08f - f2fs crypto: filename encryption facilities

Sun, 26 Apr 2015 07:12:50 +0000

f2fs crypto: filename encryption facilitiesThis patch adds filename encryption infra.Most of codes are copied from ext4 part, but changed to adjust f2fsdirectory structure.Signed-off-by: Uday Savagaonkar Signed-off-by: Ildar Muslukhov Signed-off-by: Michael Halcrow Signed-off-by: Theodore Ts'o Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

0adda907 - f2fs crypto: add encryption key management facilities

Tue, 21 Apr 2015 23:23:47 +0000

f2fs crypto: add encryption key management facilitiesThis patch copies from encrypt_key.c in ext4, and modifies for f2fs.Use GFP_NOFS, since _f2fs_get_encryption_info is called under f2fs_lock_op.Signed-off-by: Michael Halcrow Signed-off-by: Ildar Muslukhov Signed-off-by: Theodore Ts'o Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

57e5055b - f2fs crypto: add f2fs encryption facilities

Tue, 21 Apr 2015 02:52:47 +0000

f2fs crypto: add f2fs encryption facilitiesMost of parts were copied from ext4, except: - add f2fs_restore_and_release_control_page which returns control page and restore control page - remove ext4_encrypted_zeroout() - remove sbi->s_file_encryption_mode & sbi->s_dir_encryption_mode - add f2fs_end_io_crypto_work for mpage_end_ioSigned-off-by: Michael Halcrow Signed-off-by: Ildar Muslukhov Signed-off-by: Theodore Ts'o Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

f424f664 - f2fs crypto: add encryption policy and password salt support

Mon, 20 Apr 2015 22:19:06 +0000

f2fs crypto: add encryption policy and password salt supportThis patch adds encryption policy and password salt support through ioctlimplementation.It adds three ioctls: F2FS_IOC_SET_ENCRYPTION_POLICY, F2FS_IOC_GET_ENCRYPTION_POLICY, F2FS_IOC_GET_ENCRYPTION_PWSALT, which use xattr operations.Note that, these definition and codes are taken from ext4 crypto support.For f2fs, xattr operations and on-disk flags for superblock and inode werechanged.Signed-off-by: Michael Halcrow Signed-off-by: Theodore Ts'o Signed-off-by: Ildar Muslukhov Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

63f92ddc - f2fs: add f2fs_io_tracer support

Thu, 18 Dec 2014 03:45:05 +0000

f2fs: add f2fs_io_tracer supportThis patch adds: o initial trace.c and trace.h with skeleton functions o Kconfig and Makefile to activate this featureSigned-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

e18c65b2 - f2fs: key functions to handle inline data

Sun, 10 Nov 2013 15:13:19 +0000

f2fs: key functions to handle inline dataFunctions to implement inline data read/write, and move inline data tonormal data block when file size exceeds inline data limitation.Signed-off-by: Huajun Li Signed-off-by: Haicheng Li Signed-off-by: Weihong Xu Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile

a14d5393 - f2fs: update Kconfig and Makefile

Fri, 02 Nov 2012 08:25:27 +0000

f2fs: update Kconfig and MakefileThis adds Makefile and Kconfig for f2fs, and updates Makefile and Kconfig filesin the fs directory.Signed-off-by: Jaegeuk Kim List of files: /linux-6.15/fs/f2fs/Makefile