linux-stable.git/include/linux/quotaops.h, branch linux-2.6.33.y

quota: manage reserved space when quota is not active [v2]

2010-04-01T23:02:12+00:00

commit c469070aea5a0ada45a836937c776fd3083dae2b upstream.

Since we implemented generic reserved space management interface,
then it is possible to account reserved space even when quota
is not active (similar to i_blocks/i_bytes).

Without this patch following testcase result in massive comlain from
WARN_ON in dquot_claim_space()

TEST_CASE:
mount /dev/sdb /mnt -oquota
dd if=/dev/zero of=/mnt/test bs=1M count=1
quotaon /mnt
# fs_reserved_spave == 1Mb
# quota_reserved_space == 0, because quota was disabled
dd if=/dev/zero of=/mnt/test seek=1 bs=1M count=1
# fs_reserved_spave == 2Mb
# quota_reserved_space == 1Mb
sync  # ->dquot_claim_space() -> WARN_ON

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jan Kara 
Signed-off-by: Greg Kroah-Hartman

const: make struct super_block::s_qcop const

2009-09-22T14:17:24+00:00

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

const: make struct super_block::dq_op const

2009-09-22T14:17:24+00:00

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

headers: smp_lock.h redux

2009-07-12T19:22:34+00:00

* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
  It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT

  This will make hardirq.h inclusion cheaper for every PREEMPT=n config
  (which includes allmodconfig/allyesconfig, BTW)

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Linus Torvalds

quota: Introduce writeout_quota_sb() (version 4)

2009-06-12T01:36:04+00:00

Introduce this function which just writes all the quota structures but
avoids all the syncing and cache pruning work to expose quota structures
to userspace. Use this function from __sync_filesystem when wait == 0.

Signed-off-by: Jan Kara 
Signed-off-by: Al Viro

quota: cleanup dquota sync functions (version 4)

2009-06-12T01:36:04+00:00

Currently the VFS calls vfs_dq_sync to sync out disk quotas for a given
superblock.  This is a small wrapper around sync_dquots which for the
case of a non-NULL superblock is a small wrapper around quota_sync_sb.

Just make quota_sync_sb global (rename it to sync_quota_sb) and call it
directly.  Also call it directly for those cases in quota.c that have a
superblock and leave sync_dquots purely an iterator over sync_quota_sb and
remove it's superblock argument.

To make this nicer move the check for the lack of a quota_sync method
from the callers into sync_quota_sb.

[folded build fix from Alexander Beregalov ]

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jan Kara 
Signed-off-by: Al Viro

quota: Remove uppercase aliases for quota functions.

2009-03-26T01:18:37+00:00

Since all users have been converted, remove uppercase names of quota functions.

Signed-off-by: Jan Kara

quota: Use inode->i_blkbits to get block bits

2009-03-26T01:18:34+00:00

Andrew has suggested to use inode->i_blkbits to get the block bits info,
rather than use super block's blockbits. That should be faster and emit
less code.

Signed-off-by: Mingming Cao 
Signed-off-by: Jan Kara

quota: Add quota reservation claim and released operations

2009-03-26T01:18:24+00:00

Reserved quota will be claimed at the block allocation time. Over-booked
quota could be returned back with the release callback function.

Signed-off-by: Mingming Cao 
Signed-off-by: Jan Kara

quota: Add quota reservation support

2009-03-26T01:15:50+00:00

Delayed allocation defers the block allocation at the dirty pages
flush-out time, doing quota charge/check at that time is too late.
But we can't charge the quota blocks until blocks are really allocated,
otherwise users could get overcharged after reboot from system crash.

This patch adds quota reservation for delayed allocation. Quota blocks
are reserved in memory, inode and quota won't gets dirtied until later
block allocation time.

Signed-off-by: Mingming Cao 
Signed-off-by: Jan Kara