linux-toradex.git/fs/fat/fat.h, branch v6.1

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: report creation time in statx

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

creation time is no longer mixed with change time.  Add an in-memory field
for it, and report it in statx if supported.

Link: https://lkml.kernel.org/r/20220503152536.2503003-3-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

fs: make helpers idmap mount aware

2021-01-24T13:27:20+00:00

Extend some inode methods with an additional user namespace argument. A
filesystem that is aware of idmapped mounts will receive the user
namespace the mount has been marked with. This can be used for
additional permission checking and also to enable filesystems to
translate between uids and gids if they need to. We have implemented all
relevant helpers in earlier patches.

As requested we simply extend the exisiting inode method instead of
introducing new ones. This is a little more code churn but it's mostly
mechanical and doesnt't leave us with additional inode methods.

Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.com
Cc: Christoph Hellwig 
Cc: David Howells 
Cc: Al Viro 
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Christoph Hellwig 
Signed-off-by: Christian Brauner

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: move MAX_FAT to fat.h and change it to inline function

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

MAX_FAT is useless in msdos_fs.h, since it uses the MSDOS_SB function
that is defined in fat.h.  So really, this macro can be only called from
code that already includes fat.h.

Hence, this patch moves it to fat.h, right after MSDOS_SB is defined.  I
also changed it to an inline function in order to save the double call
to MSDOS_SB.  This was suggested by joe@perches.com in the previous
version.

This patch is required for the next in the series, in which the variant
(whether this is FAT12, FAT16 or FAT32) checks are replaced with new
macros.

Link: http://lkml.kernel.org/r/1544990640-11604-3-git-send-email-carmeli.tamir@gmail.com
Signed-off-by: Carmeli Tamir 
Acked-by: OGAWA Hirofumi 
Reviewed-by: Sergey Senozhatsky 
Cc: Bart Van Assche 
Cc: Johannes Thumshirn 
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

fat: propagate 64-bit inode timestamps

2018-08-22T17:52:50+00:00

Now that we pass down 64-bit timestamps from VFS, we just need to convert
that correctly into on-disk timestamps.  To make that work correctly, this
changes the last use of time_to_tm() in the kernel to time64_to_tm(),
which also lets use remove that deprecated interfaces.

Similarly, the time_t use in fat_time_fat2unix() truncates the timestamp
on the way in, which can be avoided by using types that are wide enough to
hold the intermediate values during the conversion.

[hirofumi@mail.parknet.co.jp: remove useless temporary variable, needless long long]
Link: http://lkml.kernel.org/r/20180619153646.3637529-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann 
Acked-by: OGAWA Hirofumi 
Cc: Jeff Layton 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fat: validate ->i_start before using

2018-08-22T17:52:50+00:00

On corrupted FATfs may have invalid ->i_start.  To handle it, this checks
->i_start before using, and return proper error code.

Link: http://lkml.kernel.org/r/87o9f8y1t5.fsf_-_@mail.parknet.co.jp
Signed-off-by: OGAWA Hirofumi 
Reported-by: Anatoly Trosinenko 
Tested-by: Anatoly Trosinenko 
Cc: Alan Cox 
Cc: Al Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds