kernel/linux.git/fs/fat/misc.c, branch v6.1.168

fat: remove time truncations in vfat_create/vfat_mkdir

2022-05-19T21:10:31+00:00

All the timestamps in vfat_create() and vfat_mkdir() come from fat_time_fat2unix() which ensures time granularity. We don't need to truncate them to fit FAT's format. Moreover, fat_truncate_crtime() and fat_timespec64_trunc_10ms() are also removed because there is no caller anymore. Link: https://lkml.kernel.org/r/20220503152536.2503003-4-cccheng@synology.com Signed-off-by: Chung-Chiang Cheng Acked-by: OGAWA Hirofumi Signed-off-by: Andrew Morton

fat: ignore ctime updates, and keep ctime identical to mtime in memory

2022-05-19T21:10:31+00:00

FAT supports creation time but not change time, and there was no corresponding timestamp for creation time in previous VFS. The original implementation took the compromise of saving the in-memory change time into the on-disk creation time field, but this would lead to compatibility issues with non-linux systems. To address this issue, this patch changes the behavior of ctime. It will no longer be loaded and stored from the creation time on disk. Instead of that, it'll be consistent with the in-memory mtime and share the same on-disk field. All updates to mtime will also be applied to ctime in memory, while all updates to ctime will be ignored. Link: https://lkml.kernel.org/r/20220503152536.2503003-2-cccheng@synology.com Signed-off-by: Chung-Chiang Cheng Acked-by: OGAWA Hirofumi Signed-off-by: Andrew Morton

fat: split fat_truncate_time() into separate functions

2022-05-19T21:10:31+00:00

Separate fat_truncate_time() to each timestamps for later creation time work. This patch does not introduce any functional changes, it's merely refactoring change. Link: https://lkml.kernel.org/r/20220503152536.2503003-1-cccheng@synology.com Signed-off-by: Chung-Chiang Cheng Acked-by: OGAWA Hirofumi Signed-off-by: Andrew Morton

fatfs: add FAT messages to printk index

2022-04-29T21:38:02+00:00

In order for end users to quickly react to new issues that come up in production, it is proving useful to leverage the printk indexing system. This printk index enables kernel developers to use calls to printk() with changeable ad-hoc format strings (as they always have; no change of expectations), while enabling end users to examine format strings to detect changes. Since end users are using regular expressions to match messages printed through printk(), being able to detect changes in chosen format strings from release to release provides a useful signal to review printk()-matching regular expressions for any necessary updates. So that detailed FAT messages are captured by this printk index, this patch wraps fat_msg with a macro. [akpm@linux-foundation.org: coding-style cleanups] Link: https://lkml.kernel.org/r/8aaa2dd7995e820292bb40d2120ab69756662c65.1648688136.git.jof@thejof.com Signed-off-by: Jonathan Lassoff Acked-by: OGAWA Hirofumi Reviewed-by: Petr Mladek Tested-by: Petr Mladek Signed-off-by: Andrew Morton

fat: Add KUnit tests for checksums and timestamps

2021-08-13T19:13:18+00:00

Add some basic sanity-check tests for the fat_checksum() function and the fat_time_unix2fat() and fat_time_fat2unix() functions. These unit tests verify these functions return correct output for a number of test inputs. These tests were inspired by -- and serve a similar purpose to -- the timestamp parsing KUnit tests in ext4[1]. Note that, unlike fat_time_unix2fat, fat_time_fat2unix wasn't previously exported, so this patch exports it as well. This is required for the case where we're building the fat and fat_test as modules. Fixed minor checkpatch coding style errors and typos in commit log: Shuah Khan [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/fs/ext4/inode-test.c Signed-off-by: David Gow Acked-by: OGAWA Hirofumi Reviewed-by: Brendan Higgins Tested-by: Daniel Latypov Signed-off-by: Shuah Khan

fat: only specify I_DIRTY_TIME when needed in fat_update_time()

2021-01-13T16:26:30+00:00

As was done for generic_update_time(), only pass I_DIRTY_TIME to __mark_inode_dirty() when the inode's timestamps were actually updated and lazytime is enabled. This avoids a weird edge case where I_DIRTY_TIME could be set in i_state when lazytime isn't enabled. Link: https://lore.kernel.org/r/20210112190253.64307-5-ebiggers@kernel.org Reviewed-by: Christoph Hellwig Reviewed-by: Jan Kara Signed-off-by: Eric Biggers Signed-off-by: Jan Kara

fs: fat: Eliminate timespec64_trunc() usage

2019-12-09T00:10:51+00:00

timespec64_trunc() is being deleted. timestamp_truncate() is the replacement api for timespec64_trunc. timestamp_truncate() additionally clamps timestamps to make sure the timestamps lie within the permitted range for the filesystem. But, fat always truncates the times locally after it obtains the timestamps from current_time(). Implement a local version here along the lines of existing truncate functions. Suggested-by: Al Viro Signed-off-by: Deepa Dinamani Cc: hirofumi@mail.parknet.co.jp Signed-off-by: Al Viro

treewide: Add SPDX license identifier for missed files

2019-05-21T08:50:45+00:00

Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

fat: new inline functions to determine the FAT variant (32, 16 or 12)

2019-01-04T21:13:47+00:00

This patch introduces 3 new inline functions - is_fat12, is_fat16 and is_fat32, and replaces every occurrence in the code in which the FS variant (whether this is FAT12, FAT16 or FAT32) was previously checked using msdos_sb_info->fat_bits. Link: http://lkml.kernel.org/r/1544990640-11604-4-git-send-email-carmeli.tamir@gmail.com Signed-off-by: Carmeli Tamir Acked-by: OGAWA Hirofumi Reviewed-by: Sergey Senozhatsky Cc: Johannes Thumshirn Cc: Bart Van Assche Cc: Martin K. Petersen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fat: add functions to update and truncate timestamps appropriately

2018-10-31T15:54:14+00:00

Add the fat-specific inode_operation ->update_time() and fat_truncate_time() function to truncate the inode timestamps from 1 nanosecond to the appropriate granularity. Link: http://lkml.kernel.org/r/38af1ba3c3cf0d7381ce7b63077ef8af75901532.1538363961.git.sorenson@redhat.com Signed-off-by: Frank Sorenson Acked-by: OGAWA Hirofumi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds