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2012-01-06vfs: prefer ->dentry->d_sb to ->mnt->mnt_sbAl Viro1-1/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-01-03fs: move code out of buffer.cAl Viro2-2/+0
Move invalidate_bdev, block_sync_page into fs/block_dev.c. Export kill_bdev as well, so brd doesn't have to open code it. Reduce buffer_head.h requirement accordingly. Removed a rather large comment from invalidate_bdev, as it looked a bit obsolete to bother moving. The small comment replacing it says enough. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-11-06Merge branch 'writeback-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux * 'writeback-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux: writeback: Add a 'reason' to wb_writeback_work writeback: send work item to queue_io, move_expired_inodes writeback: trace event balance_dirty_pages writeback: trace event bdi_dirty_ratelimit writeback: fix ppc compile warnings on do_div(long long, unsigned long) writeback: per-bdi background threshold writeback: dirty position control - bdi reserve area writeback: control dirty pause time writeback: limit max dirty pause time writeback: IO-less balance_dirty_pages() writeback: per task dirty rate limit writeback: stabilize bdi->dirty_ratelimit writeback: dirty rate control writeback: add bg_threshold parameter to __bdi_update_bandwidth() writeback: dirty position control writeback: account per-bdi accumulated dirtied pages
2011-11-02Merge branch 'for_linus' of ↵Linus Torvalds1-2/+5
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: Cleanup metadata flags handling udf: Skip mirror metadata FE loading when metadata FE is ok ext3: Allow quota file use root reservation udf: Remove web reference from UDF MAINTAINERS entry quota: Drop path reference on error exit from quotactl udf: Neaten udf_debug uses udf: Neaten logging output, use vsprintf extension %pV udf: Convert printks to pr_<level> udf: Rename udf_warning to udf_warn udf: Rename udf_error to udf_err udf: Promote some debugging messages to udf_error ext3: Remove the obsolete broken EXT3_IOC32_WAIT_FOR_READONLY. udf: Add readpages support for udf. ext3/balloc.c: local functions should be static ext2: fix the outdated comment in ext2_nfs_get_inode() ext3: remove deprecated oldalloc fs/ext3/balloc.c: delete useless initialization fs/ext2/balloc.c: delete useless initialization ext3: fix message in ext3_remount for rw-remount case ext3: Remove i_mutex from ext3_sync_file() Fix up trivial (printf format cleanup) conflicts in fs/udf/udfdecl.h
2011-10-31quota: Drop path reference on error exit from quotactlJan Kara1-2/+5
One error exit from quotactl forgot to do path_put(). Fix that. Reported-by: Valerie Aurora <val@vaaconsulting.com> Signed-off-by: Jan Kara <jack@suse.cz>
2011-10-31writeback: Add a 'reason' to wb_writeback_workCurt Wohlgemuth1-1/+1
This creates a new 'reason' field in a wb_writeback_work structure, which unambiguously identifies who initiates writeback activity. A 'wb_reason' enumeration has been added to writeback.h, to enumerate the possible reasons. The 'writeback_work_class' and tracepoint event class and 'writeback_queue_io' tracepoints are updated to include the symbolic 'reason' in all trace events. And the 'writeback_inodes_sbXXX' family of routines has had a wb_stats parameter added to them, so callers can specify why writeback is being started. Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
2011-09-26VFS: Fix the remaining automounter semantics regressionsTrond Myklebust1-1/+1
The concensus seems to be that system calls such as stat() etc should not trigger an automount. Neither should the l* versions. This patch therefore adds a LOOKUP_AUTOMOUNT flag to tag those lookups that _should_ trigger an automount on the last path element. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> [ Edited to leave out the cases that are already covered by LOOKUP_OPEN, LOOKUP_DIRECTORY and LOOKUP_CREATE - all of which also fundamentally force automounting for their own reasons - Linus ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-25vmscan: change shrinker API by passing shrink_control structYing Han1-1/+4
Change each shrinker's API by consolidating the existing parameters into shrink_control struct. This will simplify any further features added w/o touching each file of shrinker. [akpm@linux-foundation.org: fix build] [akpm@linux-foundation.org: fix warning] [kosaki.motohiro@jp.fujitsu.com: fix up new shrinker API] [akpm@linux-foundation.org: fix xfs warning] [akpm@linux-foundation.org: update gfs2] Signed-off-by: Ying Han <yinghan@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Minchan Kim <minchan.kim@gmail.com> Acked-by: Pavel Emelyanov <xemul@openvz.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Acked-by: Rik van Riel <riel@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-08Merge branch 'for_linus' of ↵Linus Torvalds1-9/+4
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: quota: Don't write quota info in dquot_commit() ext3: Fix writepage credits computation for ordered mode
2011-04-01quota: Don't write quota info in dquot_commit()Jan Kara1-9/+4
There's no reason to write quota info in dquot_commit(). The writing is a relict from the old days when we didn't have dquot_acquire() and dquot_release() and thus dquot_commit() could have created / removed quota structures from the file. These days dquot_commit() only updates usage counters / limits in quota structure and thus there's no need to write quota info. This also fixes an issue with journaling filesystem which didn't reserve enough space in the transaction for write of quota info (it could have been dirty at the time of dquot_commit() because of a race with other operation changing it). CC: stable@kernel.org Reported-and-tested-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz>
2011-03-31Fix common misspellingsLucas De Marchi1-1/+1
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-24fs: move i_sb_list out from under inode_lockDave Chinner1-12/+16
Protect the per-sb inode list with a new global lock inode_sb_list_lock and use it to protect the list manipulations and traversals. This lock replaces the inode_lock as the inodes on the list can be validity checked while holding the inode->i_lock and hence the inode_lock is no longer needed to protect the list. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-03-24fs: protect inode->i_state with inode->i_lockDave Chinner1-6/+7
Protect inode state transitions and validity checks with the inode->i_lock. This enables us to make inode state transitions independently of the inode_lock and is the first step to peeling away the inode_lock from the code. This requires that __iget() is done atomically with i_state checks during list traversals so that we don't race with another thread marking the inode I_FREEING between the state check and grabbing the reference. Also remove the unlock_new_inode() memory barrier optimisation required to avoid taking the inode_lock when clearing I_NEW. Simplify the code by simply taking the inode->i_lock around the state change and wakeup. Because the wakeup is no longer tricky, remove the wake_up_inode() function and open code the wakeup where necessary. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-02-24quota: return -ENOMEM when memory allocation failsDavidlohr Bueso1-1/+1
Signed-off-by: Davidlohr Bueso <dave@gnu.org> Signed-off-by: Jan Kara <jack@suse.cz>
2011-01-12quota: Fix deadlock during path resolutionJan Kara2-30/+29
As Al Viro pointed out path resolution during Q_QUOTAON calls to quotactl is prone to deadlocks. We hold s_umount semaphore for reading during the path resolution and resolution itself may need to acquire the semaphore for writing when e. g. autofs mountpoint is passed. Solve the problem by performing the resolution before we get hold of the superblock (and thus s_umount semaphore). The whole thing is complicated by the fact that some filesystems (OCFS2) ignore the path argument. So to distinguish between filesystem which want the path and which do not we introduce new .quota_on_meta callback which does not get the path. OCFS2 then uses this callback instead of old .quota_on. CC: Al Viro <viro@ZenIV.linux.org.uk> CC: Christoph Hellwig <hch@lst.de> CC: Ted Ts'o <tytso@mit.edu> CC: Joel Becker <joel.becker@oracle.com> Signed-off-by: Jan Kara <jack@suse.cz>
2011-01-10quota: Use %pV and __attribute__((format (printf in __quota_error and fix ↵Joe Perches2-11/+16
fallout Use %pV in __quota_error so a single printk can not be interleaved with other logging messages. Add __attribute__((format (printf, 3, 4))) so format and arguments can be verified by compiler. Make sure printk formats and arguments match. Block # needed a pointer dereference. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jan Kara <jack@suse.cz>
2010-10-28quota: Fix possible oops in __dquot_initialize()Jan Kara1-0/+3
When quotaon(8) races with __dquot_initialize() or dqget() fails because of EIO, ENOSPC, or similar error, we could possibly dereference NULL pointer in inode->i_dquot[cnt]. Add proper checking. Reported-by: Dmitry Monakhov <dmonakhov@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
2010-10-28quota: Fix issuing of warnings from dquot_transferJan Kara1-7/+6
__dquot_transfer accidentally called flush_warnings for a wrong set of dquots which could result in quota warnings being issued with a wrong identification. Also when operation fails because of EDQUOT, there's no need check for issuing information message about user getting below limits (no transfer has actually happened). Signed-off-by: Jan Kara <jack@suse.cz>
2010-10-28quota: fix dquot_disable vs dquot_transfer race v2Dmitry1-6/+12
I've got following lockup: dquot_disable dquot_transfer ->dqget() sb_has_quota_active dqopt->flags &= ~dquot_state_flag(f, cnt) atomic_inc(dq->dq_count) ->drop_dquot_ref(sb, cnt); down_write(dqptr_sem) inode->i_dquot[cnt] = NULL ->__dquot_transfer invalidate_dquots(sb, cnt); down_write(&dqptr_sem) ->wait for dq_wait_unused inode->i_dquot = new_dquot /* wait forever */ ^^^^New quota user^^^^^^ We cannot allow new references to dquots from inodes after drop_dquot_ref() has removed them. We have to recheck quota state under dqptr_sem and before assignment, as we do it in dquot_initialize(). Signed-off-by: Dmitry Monakhov <dmonakhov@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
2010-10-05quota: Make QUOTACTL config be selected by its usersJan Kara1-2/+2
Remove "depends on" line from QUOTACTL config option and rather select the option explicitely from config options which need it. It makes more sense this way and also fixes Kconfig warning due to GFS2 selecting QUOTACTL but QUOTACTL not depending on it. Signed-off-by: Jan Kara <jack@suse.cz>
2010-08-10Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (96 commits) no need for list_for_each_entry_safe()/resetting with superblock list Fix sget() race with failing mount vfs: don't hold s_umount over close_bdev_exclusive() call sysv: do not mark superblock dirty on remount sysv: do not mark superblock dirty on mount btrfs: remove junk sb_dirt change BFS: clean up the superblock usage AFFS: wait for sb synchronization when needed AFFS: clean up dirty flag usage cifs: truncate fallout mbcache: fix shrinker function return value mbcache: Remove unused features add f_flags to struct statfs(64) pass a struct path to vfs_statfs update VFS documentation for method changes. All filesystems that need invalidate_inode_buffers() are doing that explicitly convert remaining ->clear_inode() to ->evict_inode() Make ->drop_inode() just return whether inode needs to be dropped fs/inode.c:clear_inode() is gone fs/inode.c:evict() doesn't care about delete vs. non-delete paths now ... Fix up trivial conflicts in fs/nilfs2/super.c
2010-08-09simplify checks for I_CLEAR/I_FREEINGAl Viro1-1/+1
add I_CLEAR instead of replacing I_FREEING with it. I_CLEAR is equivalent to I_FREEING for almost all code looking at either; it's there to keep track of having called clear_inode() exactly once per inode lifetime, at some point after having set I_FREEING. I_CLEAR and I_FREEING never get set at the same time with the current code, so we can switch to setting i_flags to I_FREEING | I_CLEAR instead of I_CLEAR without loss of information. As the result of such change, checks become simpler and the amount of code that needs to know about I_CLEAR shrinks a lot. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-08-07Merge branch 'for_linus' of ↵Linus Torvalds5-80/+104
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: ext3: Fix dirtying of journalled buffers in data=journal mode ext3: default to ordered mode quota: Use mark_inode_dirty_sync instead of mark_inode_dirty quota: Change quota error message to print out disk and function name MAINTAINERS: Update entries of ext2 and ext3 MAINTAINERS: Update address of Andreas Dilger ext3: Avoid filesystem corruption after a crash under heavy delete load ext3: remove vestiges of nobh support ext3: Fix set but unused variables quota: clean up quota active checks quota: Clean up the namespace in dqblk_xfs.h quota: check quota reservation on remove_dquot_ref
2010-07-23quota: Use mark_inode_dirty_sync instead of mark_inode_dirtyJan Kara1-1/+1
Quota code never touches file data. It just modifies i_blocks + i_bytes of inodes and inode flags of quota files. So use mark_inode_dirty_sync instead of mark_inode_dirty. Signed-off-by: Jan Kara <jack@suse.cz>
2010-07-21quota: Change quota error message to print out disk and function nameJiaying Zhang5-70/+74
The current quota error message doesn't always print the disk name, so it is hard to identify the "bad" disk when quota error happens. This patch changes the standardized quota error message to print out disk name and function name. It also uses a combination of cpp macro and inline function to provide better type checking and to lower the text size of the message. [Jan Kara: Export __quota_error] Signed-off-by: Jiaying Zhang <jiayingz@google.com> Signed-off-by: Jan Kara <jack@suse.cz>
2010-07-21quota: clean up quota active checksChristoph Hellwig1-7/+16
The various quota operations check for any quota beeing active on a superblock, and the inode not having the noquota flag. Merge these two checks into a dquot_active check and move that into dquot.c as that's the only place where it's needed. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-07-21quota: Clean up the namespace in dqblk_xfs.hChristoph Hellwig1-1/+1
Almost all identifiers use the FS_* namespace, so rename the missing few XFS_* ones to FS_* as well. Without this some people might get upset about having too many XFS names in generic code. Acked-by: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-07-21quota: check quota reservation on remove_dquot_refDmitry Monakhov1-1/+12
Reserved space must being claimed before remove_dquot_ref() for a given inode. Filesystem is responsible for performing force blocks allocation in case of dealloc in ->quota_off. Let's add sanity check for that case. Do it similar to add_dquot_ref(). Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
2010-07-19mm: add context argument to shrinker callbackDave Chinner1-1/+1
The current shrinker implementation requires the registered callback to have global state to work from. This makes it difficult to shrink caches that are not global (e.g. per-filesystem caches). Pass the shrinker structure to the callback so that users can embed the shrinker structure in the context the shrinker needs to operate on and get back to it in the callback via container_of(). Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2010-05-30Merge branch 'for_linus' of ↵Linus Torvalds2-113/+81
git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: quota: Convert quota statistics to generic percpu_counter ext3 uses rb_node = NULL; to zero rb_root. quota: Fixup dquot_transfer reiserfs: Fix resuming of quotas on remount read-write pohmelfs: Remove dead quota code ufs: Remove dead quota code udf: Remove dead quota code quota: rename default quotactl methods to dquot_ quota: explicitly set ->dq_op and ->s_qcop quota: drop remount argument to ->quota_on and ->quota_off quota: move unmount handling into the filesystem quota: kill the vfs_dq_off and vfs_dq_quota_on_remount wrappers quota: move remount handling into the filesystem ocfs2: Fix use after free on remount read-only Fix up conflicts in fs/ext4/super.c and fs/ufs/file.c
2010-05-27Merge branch 'for_linus' of ↵Linus Torvalds1-4/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (40 commits) ext4: Make fsync sync new parent directories in no-journal mode ext4: Drop whitespace at end of lines ext4: Fix compat EXT4_IOC_ADD_GROUP ext4: Conditionally define compat ioctl numbers tracing: Convert more ext4 events to DEFINE_EVENT ext4: Add new tracepoints to track mballoc's buddy bitmap loads ext4: Add a missing trace hook ext4: restart ext4_ext_remove_space() after transaction restart ext4: Clear the EXT4_EOFBLOCKS_FL flag only when warranted ext4: Avoid crashing on NULL ptr dereference on a filesystem error ext4: Use bitops to read/modify i_flags in struct ext4_inode_info ext4: Convert calls of ext4_error() to EXT4_ERROR_INODE() ext4: Convert callers of ext4_get_blocks() to use ext4_map_blocks() ext4: Add new abstraction ext4_map_blocks() underneath ext4_get_blocks() ext4: Use our own write_cache_pages() ext4: Show journal_checksum option ext4: Fix for ext4_mb_collect_stats() ext4: check for a good block group before loading buddy pages ext4: Prevent creation of files larger than RLIMIT_FSIZE using fallocate ext4: Remove extraneous newlines in ext4_msg() calls ... Fixed up trivial conflict in fs/ext4/fsync.c
2010-05-27quota: Convert quota statistics to generic percpu_counterDmitry Monakhov1-33/+13
Generic per-cpu counter has some memory overhead but it is negligible for modern systems and embedded systems compile without quota support. And code reuse is a good thing. This patch should fix complain from preemptive kernels which was introduced by dde9588853b1bde. [Jan Kara: Fixed patch to work on 32-bit archs as well] Reported-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-27quota: Fixup dquot_transferJan Kara1-1/+1
Commit bc8e5f07392f05c47c8bdeff4f7098db440d065c had a typo which caused quota miscomputation when changing owner group of a file. Linus will hate me. Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-24quota: rename default quotactl methods to dquot_Christoph Hellwig1-32/+32
Follow the dquot_* style used elsewhere in dquot.c. [Jan Kara: Fixed up missing conversion of ext2] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-24quota: explicitly set ->dq_op and ->s_qcopChristoph Hellwig1-1/+2
Only set the quota operation vectors if the filesystem actually supports quota instead of doing it for all filesystems in alloc_super(). [Jan Kara: Export dquot_operations and vfs_quotactl_ops] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-24quota: drop remount argument to ->quota_on and ->quota_offChristoph Hellwig2-8/+4
Remount handling has fully moved into the filesystem, so all this is superflous now. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-24quota: kill the vfs_dq_off and vfs_dq_quota_on_remount wrappersChristoph Hellwig1-43/+34
Instead of having wrappers in the VFS namespace export the dquot_suspend and dquot_resume helpers directly. Also rename vfs_quota_disable to dquot_disable while we're at it. [Jan Kara: Moved dquot_suspend to quotaops.h and made it inline] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21new helper: iterate_supers()Al Viro1-24/+9
... and switch the simple "loop over superblocks and do something" loops to it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-05-21Bury __put_super_and_need_restart()Al Viro1-0/+1
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-05-21Convert simple loops over superblocks to list_for_each_entry_safeAl Viro1-5/+3
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-05-21Leave superblocks on s_list until the endAl Viro1-0/+2
We used to remove from s_list and s_instances at the same time. So let's *not* do the former and skip superblocks that have empty s_instances in the loops over s_list. The next step, of course, will be to get rid of rescan logics in those loops. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-05-21dquot: Detect partial write error to quota file in write_blk() and add ↵Jiaying Zhang3-22/+36
printk_ratelimit for quota error messages This patch changes quota_tree.c:write_blk() to detect error caused by partial write to quota file and add a macro to limit control printed quota error messages so we won't fill up dmesg with a corrupted quota file. Signed-off-by: Jiaying Zhang <jiayingz@google.com> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21quota: Refactor dquot_transfer code so that OCFS2 can pass in its referencesJan Kara1-35/+26
Currently, __dquot_transfer() acquires its own references of dquot structures that will be put into inode. But for OCFS2, this creates a lock inversion between dq_lock (waited on in dqget) and transaction start (started in ocfs2_setattr). Currently, deadlock is impossible because dq_lock is acquired only during dquot_acquire and dquot_release and we already hold a reference to dquot structures in ocfs2_setattr so neither of these functions can be called while we call dquot_transfer. But this is rather subtle and it is hard to teach lockdep about it. So provide __dquot_transfer function that can be passed dquot references directly. OCFS2 can then pass acquired dquot references directly to __dquot_transfer with proper locking. Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21quota: unify quota init condition in setattrDmitry Monakhov1-3/+2
Quota must being initialized if size or uid/git changes requested. But initialization performed in two different places: in case of i_size file system is responsible for dquot init , but in case of uid/gid init will be called internally in dquot_transfer(). This ambiguity makes code harder to understand. Let's move this logic to one common helper function. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21quota: remove sb_has_quota_active in get/set_infoChristoph Hellwig1-4/+0
The methods already do these checks, so remove them in the quotactl implementation to allow non-VFS quota implementations to also support these calls. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21quota: unify ->set_dqblkChristoph Hellwig2-29/+74
Pass the larger struct fs_disk_quota to the ->set_dqblk operation so that the Q_SETQUOTA and Q_XSETQUOTA operations can be implemented with a single filesystem operation and we can retire the ->set_xquota operation. The additional information (RT-subvolume accounting and warn counts) are left zero for the VFS quota implementation. Add new fieldmask values for setting the numer of blocks and inodes values which is required for the VFS quota, but wasn't for XFS. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21quota: unify ->get_dqblkChristoph Hellwig2-16/+34
Pass the larger struct fs_disk_quota to the ->get_dqblk operation so that the Q_GETQUOTA and Q_XGETQUOTA operations can be implemented with a single filesystem operation and we can retire the ->get_xquota operation. The additional information (RT-subvolume accounting and warn counts) are left zero for the VFS quota implementation. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21quota: Make quota stat accounting lockless.Dmitry Monakhov3-38/+72
Quota stats is mostly writable data structure. Let's alloc percpu bucket for each value. NOTE: dqstats_read() function is racy against dqstats_{inc,dec} and may return inconsistent value. But this is ok since absolute accuracy is not required. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21suppress warning: "quotatypes" defined but not usedSergey Senozhatsky1-0/+2
Suppress compilation warning: "quotatypes" defined but not used. quotatypes is used only when CONFIG_QUOTA_DEBUG or CONFIG_PRINT_QUOTA_WARNING is/are defined. Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
2010-05-21quota: optimize mark_dirty logicDmitry Monakhov1-2/+11
- Skip locking if quota is dirty already. - Return old quota state to help fs-specciffic implementation to optimize case where quota was dirty already. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
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