linux-toradex.git/fs/quota, branch v4.18-rc4

quota: Cleanup list iteration in dqcache_shrink_scan()

2018-06-20T09:04:26+00:00

Use list_first_entry() and list_empty() instead of opencoded variants.

Reviewed-by: Matthew Wilcox 
Signed-off-by: Jan Kara

quota: reclaim least recently used dquots

2018-06-20T09:04:26+00:00

The dquots in the free_dquots list are not reclaimed in LRU way.
put_dquot_last() puts entries to the tail and dqcache_shrink_scan()
frees from the tail. Free unreferenced dquots in LRU order because it
seems more reasonable than freeing most recently used.

Signed-off-by: Greg Thelen 
Signed-off-by: Shakeel Butt 
Signed-off-by: Jan Kara

fs: quota: Replace GFP_ATOMIC with GFP_KERNEL in dquot_init

2018-04-09T15:48:54+00:00

dquot_init() is never called in atomic context.
This function is only set as a parameter of fs_initcall().

Despite never getting called from atomic context,
dquot_init() calls __get_free_pages() with GFP_ATOMIC,
which waits busily for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
to avoid busy waiting and improve the possibility of sucessful allocation.

This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.

Signed-off-by: Jia-Ju Bai 
Signed-off-by: Jan Kara

fs/quota: use COMPAT_SYSCALL_DEFINE for sys32_quotactl()

2018-04-02T18:15:47+00:00

While sys32_quotactl() is only needed on x86, it can use the recommended
COMPAT_SYSCALL_DEFINEx() machinery for its setup.

Acked-by: Jan Kara 
Cc: Christoph Hellwig 
Signed-off-by: Dominik Brodowski

fs/quota: add kernel_quotactl() helper; remove in-kernel call to syscall

2018-04-02T18:15:46+00:00

Using the fs-internal kernel_quotactl() helper allows us to get rid of
the fs-internal call to the sys_quotactl() syscall.

This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/20180325162527.GA17492@light.dominikbrodowski.net

Acked-by: Jan Kara 
Signed-off-by: Dominik Brodowski

quota: Check for register_shrinker() failure.

2017-11-29T15:46:48+00:00

register_shrinker() might return -ENOMEM error since Linux 3.12.
Call panic() as with other failure checks in this function if
register_shrinker() failed.

Fixes: 1d3d4437eae1 ("vmscan: per-node deferred work")
Signed-off-by: Tetsuo Handa 
Cc: Jan Kara 
Cc: Michal Hocko 
Reviewed-by: Michal Hocko 
Signed-off-by: Jan Kara

quota: propagate error from __dquot_initialize

2017-11-28T15:08:08+00:00

In commit 6184fc0b8dd7 ("quota: Propagate error from ->acquire_dquot()"),
we have propagated error from __dquot_initialize to caller, but we forgot
to handle such error in add_dquot_ref(), so, currently, during quota
accounting information initialization flow, if we failed for some of
inodes, we just ignore such error, and do account for others, which is
not a good implementation.

In this patch, we choose to let user be aware of such error, so after
turning on quota successfully, we can make sure all inodes disk usage
can be accounted, which will be more reasonable.

Suggested-by: Jan Kara 
Signed-off-by: Chao Yu 
Signed-off-by: Jan Kara

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2017-11-14T22:13:11+00:00

Pull quota, ext2, isofs and udf fixes from Jan Kara:

 - two small quota error handling fixes

 - two isofs fixes for architectures with signed char

 - several udf block number overflow and signedness fixes

 - ext2 rework of mount option handling to avoid GFP_KERNEL allocation
   with spinlock held

 - ... it also contains a patch to implement auditing of responses to
   fanotify permission events. That should have been in the fanotify
   pull request but I mistakenly merged that patch into a wrong branch
   and noticed only now at which point I don't think it's worth rebasing
   and redoing.

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: be aware of error from dquot_initialize
  quota: fix potential infinite loop
  isofs: use unsigned char types consistently
  isofs: fix timestamps beyond 2027
  udf: Fix some sign-conversion warnings
  udf: Fix signed/unsigned format specifiers
  udf: Fix 64-bit sign extension issues affecting blocks > 0x7FFFFFFF
  udf: Remove some outdate references from documentation
  udf: Avoid overflow when session starts at large offset
  ext2: Fix possible sleep in atomic during mount option parsing
  ext2: Parse mount options into a dedicated structure
  audit: Record fanotify access control decisions

Merge udf, isofs, quota, ext2 changes for 4.15-rc1.

2017-11-14T10:09:53+00:00

quota: be aware of error from dquot_initialize

2017-11-13T09:36:56+00:00

Commit 6184fc0b8dd7 ("quota: Propagate error from ->acquire_dquot()")
missed to handle error from dquot_initialize in dquot_file_open, fix it.

Signed-off-by: Chao Yu 
Signed-off-by: Jan Kara