summaryrefslogtreecommitdiffstats
path: root/include/linux/quota.h
Commit message (Collapse)AuthorAgeFilesLines
* quota: Add support for ->get_nextdqblk() for VFS quotaJan Kara2016-02-091-0/+3
| | | | | | | | Add infrastructure for supporting get_nextdqblk() callback for VFS quotas. Translate the operation into a callback to appropriate filesystem and consequently to quota format callback. Signed-off-by: Jan Kara <jack@suse.cz>
* quota: add new quotactl Q_XGETNEXTQUOTAEric Sandeen2016-02-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Q_XGETNEXTQUOTA is exactly like Q_XGETQUOTA, except that it will return quota information for the id equal to or greater than the id requested. In other words, if the requested id has no quota, the command will return quota information for the next higher id which does have a quota set. If no higher id has an active quota, -ESRCH is returned. This allows filesystems to do efficient iteration in kernelspace, much like extN filesystems do in userspace when asked to report all active quotas. The patch adds a d_id field to struct qc_dqblk so that we can pass back the id of the quota which was found, and return it to userspace. Today, filesystems such as XFS require getpwent-style iterations, and for systems which have i.e. LDAP backends, this can be very slow, or even impossible if iteration is not allowed in the configuration. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Dave Chinner <david@fromorbit.com>
* vfs: Add general support to enforce project quota limitsLi Xi2015-03-181-0/+2
| | | | | | | | | | | This patch adds support for a new quota type PRJQUOTA for project quota enforcement. Also a new method get_projid() is added into dquot_operations structure. Signed-off-by: Li Xi <lixi@ddn.com> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Jan Kara <jack@suse.cz>
* Merge branch 'quota_interface' into for_next_testingJan Kara2015-03-161-5/+51
|\
| * quota: Make ->set_info use structure with neccesary info to VFS and XFSJan Kara2015-03-041-2/+19
| | | | | | | | | | | | | | | | Change ->set_info to take new qc_info structure which contains all the necessary information both for XFS and VFS. Convert Q_SETINFO handler to use this structure. Signed-off-by: Jan Kara <jack@suse.cz>
| * quota: Remove ->get_xstate and ->get_xstatev callbacksJan Kara2015-03-041-2/+0
| | | | | | | | | | | | | | These callbacks are now unused. Remove them. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
| * quota: Make VFS quotas use new interface for getting quota infoJan Kara2015-03-041-1/+32
| | | | | | | | | | | | | | | | | | Create new internal interface for getting information about quota which contains everything needed for both VFS quotas and XFS quotas. Make VFS use this and hook it up to Q_GETINFO. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* | quota: reorder flags in quota stateKonstantin Khlebnikov2015-03-041-7/+25
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Flags in struct quota_state keep flags for each quota type and some common flags. This patch reorders typed flags: Before: 0 USRQUOTA DQUOT_USAGE_ENABLED 1 USRQUOTA DQUOT_LIMITS_ENABLED 2 USRQUOTA DQUOT_SUSPENDED 3 GRPQUOTA DQUOT_USAGE_ENABLED 4 GRPQUOTA DQUOT_LIMITS_ENABLED 5 GRPQUOTA DQUOT_SUSPENDED 6 DQUOT_QUOTA_SYS_FILE 7 DQUOT_NEGATIVE_USAGE After: 0 USRQUOTA DQUOT_USAGE_ENABLED 1 GRPQUOTA DQUOT_USAGE_ENABLED 2 USRQUOTA DQUOT_LIMITS_ENABLED 3 GRPQUOTA DQUOT_LIMITS_ENABLED 4 USRQUOTA DQUOT_SUSPENDED 5 GRPQUOTA DQUOT_SUSPENDED 6 DQUOT_QUOTA_SYS_FILE 7 DQUOT_NEGATIVE_USAGE Now we can get bitmap of all enabled/suspended quota types without loop. For example suspended: (flags / DQUOT_SUSPENDED) & ((1 << MAXQUOTAS) - 1). add/remove: 0/1 grow/shrink: 3/11 up/down: 56/-215 (-159) function old new delta __dquot_initialize 423 447 +24 dquot_transfer 181 197 +16 dquot_alloc_inode 286 302 +16 dquot_reclaim_space_nodirty 316 313 -3 dquot_claim_space_nodirty 314 311 -3 dquot_resume 286 281 -5 dquot_free_inode 332 324 -8 __dquot_alloc_space 500 492 -8 dquot_disable 1944 1929 -15 dquot_quota_enable 252 236 -16 __dquot_free_space 750 734 -16 dquot_writeback_dquots 625 608 -17 __dquot_transfer 1186 1154 -32 dquot_quota_sync 299 261 -38 dquot_active.isra 54 - -54 Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Store maximum space limit in bytesJan Kara2015-01-301-2/+2
| | | | | | | | | | Currently maximum space limit quota format supports is in blocks however since we store space limits in bytes, this is somewhat confusing. So store the maximum limit in bytes as well. Also rename the field to match the new unit and related inode field to match the new naming scheme. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Remove quota_on_meta callbackJan Kara2015-01-301-1/+0
| | | | | | | There are no more users for quota_on_meta callback. Just remove it. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Split ->set_xstate callback into twoJan Kara2015-01-301-1/+2
| | | | | | | | | | Split ->set_xstate callback into two callbacks - one for turning quotas on (->quota_enable) and one for turning quotas off (->quota_disable). That way we don't have to pass quotactl command into the callback which seems cleaner. Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* Merge branch 'for_linus' into for_nextJan Kara2015-01-301-2/+45
|\
| * quota: Switch ->get_dqblk() and ->set_dqblk() to use bytes as space unitsJan Kara2015-01-281-2/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently ->get_dqblk() and ->set_dqblk() use struct fs_disk_quota which tracks space limits and usage in 512-byte blocks. However VFS quotas track usage in bytes (as some filesystems require that) and we need to somehow pass this information. Upto now it wasn't a problem because we didn't do any unit conversion (thus VFS quota routines happily stuck number of bytes into d_bcount field of struct fd_disk_quota). Only if you tried to use Q_XGETQUOTA or Q_XSETQLIM for VFS quotas (or Q_GETQUOTA / Q_SETQUOTA for XFS quotas), you got bogus results. Hardly anyone tried this but reportedly some Samba users hit the problem in practice. So when we want interfaces compatible we need to fix this. We bite the bullet and define another quota structure used for passing information from/to ->get_dqblk()/->set_dqblk. It's somewhat sad we have to have more conversion routines in fs/quota/quota.c and another copying of quota structure slows down getting of quota information by about 2% but it seems cleaner than overloading e.g. units of d_bcount to bytes. CC: stable@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* | quota: Cleanup flags definitionsJan Kara2015-01-211-6/+8
|/ | | | | | | | Currently all quota flags were defined just in kernel-private headers. Export flags readable / writeable from userspace to userspace via include/uapi/linux/quota.h. Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Allow each filesystem to specify which quota types it supportsJan Kara2014-11-101-0/+5
| | | | | | | | | | | Currently all filesystems supporting VFS quota support user and group quotas. With introduction of project quotas this is going to change so make sure filesystem isn't called for quota type it doesn't support by introduction of a bitmask determining which quota types each filesystem supports. Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: remove dqptr_semNiu Yawei2014-07-151-1/+0
| | | | | | | | | | Remove dqptr_sem to make quota code scalable: Remove the dqptr_sem, accessing inode->i_dquot now protected by dquot_srcu, and changing inode->i_dquot is now serialized by dq_data_lock. Signed-off-by: Lai Siyao <lai.siyao@intel.com> Signed-off-by: Niu Yawei <yawei.niu@intel.com> Signed-off-by: Jan Kara <jack@suse.cz>
* xfs: fix Q_XQUOTARM ioctlEric Sandeen2014-05-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | The Q_XQUOTARM quotactl was not working properly, because we weren't passing around proper flags. The xfs_fs_set_xstate() ioctl handler used the same flags for Q_XQUOTAON/OFF as well as for Q_XQUOTARM, but Q_XQUOTAON/OFF look for XFS_UQUOTA_ACCT, XFS_UQUOTA_ENFD, XFS_GQUOTA_ACCT etc, i.e. quota type + state, while Q_XQUOTARM looks only for the type of quota, i.e. XFS_DQ_USER, XFS_DQ_GROUP etc. Unfortunately these flag spaces overlap a bit, so we got semi-random results for Q_XQUOTARM; i.e. the value for XFS_DQ_USER == XFS_UQUOTA_ACCT, etc. yeargh. Add a new quotactl op vector specifically for the QUOTARM operation, since it operates with a different flag space. This has been broken more or less forever, AFAICT. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Acked-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
* quota: Add a new quotactl command Q_XGETQSTATVChandra Seetharaman2013-08-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | XFS now supports three types of quotas (user, group and project). Current version of Q_XGETSTAT has support for only two types of quotas. In order to support three types of quotas, the interface, specifically struct fs_quota_stat, need to be expanded. Current version of fs_quota_stat does not allow expansion without breaking backward compatibility. So, a quotactl command and new fs_quota_stat structure need to be added. This patch adds a new command Q_XGETQSTATV to quotactl() which takes a new data structure fs_quota_statv. This new data structure provides support for future expansion and backward compatibility. Callers of the new quotactl command have to set the version of the data structure being passed, and kernel will fill as much data as requested. If the kernel does not support the user-space provided version, EINVAL will be returned. User-space can reduce the version number and call the same quotactl again. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Rich Johnston <rjohnston@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com> [v2: Applied rjohnston's suggestions as per Chandra's request. -bpm]
* quota: autoload the quota_v2 module for QFMT_VFS_V1 quota formatTheodore Ts'o2013-01-241-0/+1
| | | | | | | | | | | Otherwise, ext4 file systems with the quota featured enable will get a very confusing "No such process" error message if the quota code is built as a module and the quota_v2 module has not been loaded. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Acked-by: Jan Kara <jack@suse.cz> Cc: stable@vger.kernel.org
* UAPI: (Scripted) Disintegrate include/linuxDavid Howells2012-10-131-138/+1
| | | | | | | | | Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
* userns: Convert struct dquot dq_id to be a struct kqidEric W. Biederman2012-09-181-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Change struct dquot dq_id to a struct kqid and remove the now unecessary dq_type. Make minimal changes to dquot, quota_tree, quota_v1, quota_v2, ext3, ext4, and ocfs2 to deal with the change in quota structures and signatures. The ocfs2 changes are larger than most because of the extensive tracing throughout the ocfs2 quota code that prints out dq_id. quota_tree.c:get_index is modified to take a struct kqid instead of a qid_t because all of it's callers pass in dquot->dq_id and it allows me to introduce only a single conversion. The rest of the changes are either just replacing dq_type with dq_id.type, adding conversions to deal with the change in type and occassionally adding qid_eq to allow quota id comparisons in a user namespace safe way. Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Jan Kara <jack@suse.cz> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Theodore Tso <tytso@mit.edu> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* userns: Convert quota netlink aka quota_send_warningEric W. Biederman2012-09-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | Modify quota_send_warning to take struct kqid instead a type and identifier pair. When sending netlink broadcasts always convert uids and quota identifiers into the intial user namespace. There is as yet no way to send a netlink broadcast message with different contents to receivers in different namespaces, so for the time being just map all of the identifiers into the initial user namespace which preserves the current behavior. Change the callers of quota_send_warning in gfs2, xfs and dquot to generate a struct kqid to pass to quota send warning. When all of the user namespaces convesions are complete a struct kqid values will be availbe without need for conversion, but a conversion is needed now to avoid needing to convert everything at once. Cc: Ben Myers <bpm@sgi.com> Cc: Alex Elder <elder@kernel.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Jan Kara <jack@suse.cz> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* userns: Convert qutoactlEric W. Biederman2012-09-181-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update the quotactl user space interface to successfull compile with user namespaces support enabled and to hand off quota identifiers to lower layers of the kernel in struct kqid instead of type and qid pairs. The quota on function is not converted because while it takes a quota type and an id. The id is the on disk quota format to use, which is something completely different. The signature of two struct quotactl_ops methods were changed to take struct kqid argumetns get_dqblk and set_dqblk. The dquot, xfs, and ocfs2 implementations of get_dqblk and set_dqblk are minimally changed so that the code continues to work with the change in parameter type. This is the first in a series of changes to always store quota identifiers in the kernel in struct kqid and only use raw type and qid values when interacting with on disk structures or userspace. Always using struct kqid internally makes it hard to miss places that need conversion to or from the kernel internal values. Cc: Jan Kara <jack@suse.cz> Cc: Dave Chinner <david@fromorbit.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Ben Myers <bpm@sgi.com> Cc: Alex Elder <elder@kernel.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* userns: Implement struct kqidEric W. Biederman2012-09-181-0/+125
| | | | | | | | | | | | | | | | | | Add the data type struct kqid which holds the kernel internal form of the owning identifier of a quota. struct kqid is a replacement for the implicit union of uid, gid and project id stored in an unsigned int and the quota type field that is was used in the quota data structures. Making the data type explicit allows the kuid_t and kgid_t type safety to propogate more thoroughly through the code, revealing more places where uid/gid conversions need be made. Along with the data type struct kqid comes the helper functions qid_eq, qid_lt, from_kqid, from_kqid_munged, qid_valid, make_kqid, make_kqid_invalid, make_kqid_uid, make_kqid_gid. Cc: Jan Kara <jack@suse.cz> Cc: Dave Chinner <david@fromorbit.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
* quota: Split dquot_quota_sync() to writeback and cache flushing partJan Kara2012-07-221-1/+1
| | | | | | | | | | | | Split off part of dquot_quota_sync() which writes dquots into a quota file to a separate function. In the next patch we will use the function from filesystems and we do not want to abuse ->quota_sync quotactl callback more than necessary. Acked-by: Steven Whitehouse <swhiteho@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* quota: Pass information that quota is stored in system file to userspaceJan Kara2012-01-121-1/+5
| | | | | | | | Quota tools need to know whether quota is stored in a system file or in classical aquota.{user|group} files. So pass this information as a flag in GETINFO quotactl. Signed-off-by: Jan Kara <jack@suse.cz>
* atomic: use <linux/atomic.h>Arun Sharma2011-07-261-1/+1
| | | | | | | | | | | | | | This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* quota: Remove unused declarationJan Kara2011-07-201-8/+0
| | | | | | | There is no point in declaring quotactl() syscall prototype in kernel header and 'make headers_check' complains about it. So just remove those lines. Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Fix deadlock during path resolutionJan Kara2011-01-121-1/+4
| | | | | | | | | | | | | | | | | | | | 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>
* quota: Convert quota statistics to generic percpu_counterDmitry Monakhov2010-05-271-12/+4
| | | | | | | | | | | | | 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>
* quota: drop remount argument to ->quota_on and ->quota_offChristoph Hellwig2010-05-241-2/+2
| | | | | | | | 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>
* quota: unify ->set_dqblkChristoph Hellwig2010-05-211-2/+1
| | | | | | | | | | | | | | 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>
* quota: unify ->get_dqblkChristoph Hellwig2010-05-211-2/+1
| | | | | | | | | | | 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>
* quota: Make quota stat accounting lockless.Dmitry Monakhov2010-05-211-8/+34
| | | | | | | | | | | | 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>
* quota: stop using QUOTA_OK / NO_QUOTAChristoph Hellwig2010-03-051-3/+0
| | | | | | | Just use 0 / -EDQUOT directly - that's what it translates to anyway. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* dquot: cleanup dquot initialize routineChristoph Hellwig2010-03-051-1/+0
| | | | | | | | | | | | Get rid of the initialize dquot operation - it is now always called from the filesystem and if a filesystem really needs it's own (which none currently does) it can just call into it's own routine directly. Rename the now static low-level dquot_initialize helper to __dquot_initialize and vfs_dq_init to dquot_initialize to have a consistent namespace. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* dquot: cleanup dquot drop routineChristoph Hellwig2010-03-051-1/+0
| | | | | | | | | | | | Get rid of the drop dquot operation - it is now always called from the filesystem and if a filesystem really needs it's own (which none currently does) it can just call into it's own routine directly. Rename the now static low-level dquot_drop helper to __dquot_drop and vfs_dq_drop to dquot_drop to have a consistent namespace. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* dquot: cleanup dquot transfer routineChristoph Hellwig2010-03-051-1/+0
| | | | | | | | | | | | | | Get rid of the transfer dquot operation - it is now always called from the filesystem and if a filesystem really needs it's own (which none currently does) it can just call into it's own routine directly. Rename the now static low-level dquot_transfer helper to __dquot_transfer and vfs_dq_transfer to dquot_transfer to have a consistent namespace, and make the new dquot_transfer return a normal negative errno value which all callers expect. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* dquot: cleanup inode allocation / freeing routinesChristoph Hellwig2010-03-051-2/+0
| | | | | | | | | | | | | | Get rid of the alloc_inode and free_inode dquot operations - they are always called from the filesystem and if a filesystem really needs their own (which none currently does) it can just call into it's own routine directly. Also get rid of the vfs_dq_alloc/vfs_dq_free wrappers and always call the lowlevel dquot_alloc_inode / dqout_free_inode routines directly, which now lose the number argument which is always 1. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* dquot: cleanup space allocation / freeing routinesChristoph Hellwig2010-03-051-8/+0
| | | | | | | | | | | | | | | | Get rid of the alloc_space, free_space, reserve_space, claim_space and release_rsv dquot operations - they are always called from the filesystem and if a filesystem really needs their own (which none currently does) it can just call into it's own routine directly. Move shared logic into the common __dquot_alloc_space, dquot_claim_space_nodirty and __dquot_free_space low-level methods, and rationalize the wrappers around it to move as much as possible code into the common block for CONFIG_QUOTA vs not. Also rename all these helpers to be named dquot_* instead of vfs_dq_*. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: generalize quota transfer interfaceDmitry Monakhov2010-03-051-1/+1
| | | | | | | | | | Current quota transfer interface support only uid/gid. This patch extend interface in order to support various quotas types The goal is accomplished without changes in most frequently used vfs_dq_transfer() func. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: sb_quota state flags cleanupDmitry Monakhov2010-03-051-8/+7
| | | | | | | | - remove hardcoded USRQUOTA/GRPQUOTA flags - convert int to bool for appropriate functions Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: move code from sync_quota_sb into vfs_quota_syncChristoph Hellwig2010-03-051-1/+1
| | | | | | | | | | | | | Currenly sync_quota_sb does a lot of sync and truncate action that only applies to "VFS" style quotas and is actively harmful for the sync performance in XFS. Move it into vfs_quota_sync and add a wait parameter to ->quota_sync to tell if we need it or not. My audit of the GFS2 code says it's also not needed given the way GFS2 implements quotas, but I'd be happy if this can get a detailed review. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: decouple fs reserved space from quota reservationDmitry Monakhov2009-12-231-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | Currently inode_reservation is managed by fs itself and this reservation is transfered on dquot_transfer(). This means what inode_reservation must always be in sync with dquot->dq_dqb.dqb_rsvspace. Otherwise dquot_transfer() will result in incorrect quota(WARN_ON in dquot_claim_reserved_space() will be triggered) This is not easy because of complex locking order issues for example http://bugzilla.kernel.org/show_bug.cgi?id=14739 The patch introduce quota reservation field for each fs-inode (fs specific inode is used in order to prevent bloating generic vfs inode). This reservation is managed by quota code internally similar to i_blocks/i_bytes and may not be always in sync with internal fs reservation. Also perform some code rearrangement: - Unify dquot_reserve_space() and dquot_reserve_space() - Unify dquot_release_reserved_space() and dquot_free_space() - Also this patch add missing warning update to release_rsv() dquot_release_reserved_space() must call flush_warnings() as dquot_free_space() does. Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Implement quota format with 64-bit space and inode limitsJan Kara2009-12-101-0/+1
| | | | | | | | | | | | | So far the maximum quota space limit was 4TB. Apparently this isn't enough for Lustre guys anymore. So implement new quota format which raises block limits to 2^64 bytes. Also store number of inodes and inode limits in 64-bit variables as 2^32 files isn't that insanely high anymore. The first version of the patch has been developed by Andrew Perepechko <Andrew.Perepechko@Sun.COM>. CC: Andrew.Perepechko@Sun.COM Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Move definition of QFMT_OCFS2 to linux/quota.hJan Kara2009-12-101-0/+1
| | | | | | | | Move definition of this constant to linux/quota.h so that it cannot clash with other format IDs. CC: Joel Becker <joel.becker@oracle.com> Signed-off-by: Jan Kara <jack@suse.cz>
* const: struct quota_format_opsAlexey Dobriyan2009-12-101-2/+2
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
* VFS: Export dquot_send_warningSteven Whitehouse2009-12-031-0/+11
| | | | | | | | | | | Sending a message to userspace in a generic format to warn of events (e.g. quota exceeded) in the quota subsystem is a generically useful feature. This patch makes some minor changes to the send_message function from dquot.c renaming it quota_send_message, moving it to quota.c and exporting it for use by filesystems which do not use the dquot code. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* quota: Remove NODQUOT macroJan Kara2009-03-261-2/+0
| | | | | | | Remove this macro which is just a definition of NULL. Fix a few coding style issues along the way. Signed-off-by: Jan Kara <jack@suse.cz>
* quota: Add quota reservation claim and released operationsMingming Cao2009-03-261-0/+6
| | | | | | | | 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 <cmm@us.ibm.com> Signed-off-by: Jan Kara <jack@suse.cz>
OpenPOWER on IntegriCloud