korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-18 17:54:13 +08:00
Code Issues Packages Projects Releases Wiki Activity
093019cf1b
linux/fs/xfs/xfs_qm_syscalls.c
Christoph Hellwig ddc3415aba xfs: simplify xfs_trans_ijoin* again 
There is no reason to keep a reference to the inode even if we unlock
it during transaction commit because we never drop a reference between
the ijoin and commit.  Also use this fact to merge xfs_trans_ijoin_ref
back into xfs_trans_ijoin - the third argument decides if an unlock
is needed now.

I'm actually starting to wonder if allowing inodes to be unlocked
at transaction commit really is worth the effort.  The only real
benefit is that they can be unlocked earlier when commiting a
synchronous transactions, but that could be solved by doing the
log force manually after the unlock, too.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
2011-10-11 21:15:08 -05:00

907 lines
25 KiB
C
Raw Blame History

/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/capability.h>
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_alloc.h"
#include "xfs_quota.h"
#include "xfs_mount.h"
#include "xfs_bmap_btree.h"
#include "xfs_inode.h"
#include "xfs_itable.h"
#include "xfs_bmap.h"
#include "xfs_rtalloc.h"
#include "xfs_error.h"
#include "xfs_attr.h"
#include "xfs_buf_item.h"
#include "xfs_utils.h"
#include "xfs_qm.h"
#include "xfs_trace.h"
STATIC int xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
STATIC int xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
uint);
STATIC uint xfs_qm_export_flags(uint);
STATIC uint xfs_qm_export_qtype_flags(uint);
STATIC void xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
fs_disk_quota_t *);
/*
* Turn off quota accounting and/or enforcement for all udquots and/or
* gdquots. Called only at unmount time.
*
* This assumes that there are no dquots of this file system cached
* incore, and modifies the ondisk dquot directly. Therefore, for example,
* it is an error to call this twice, without purging the cache.
*/
int
xfs_qm_scall_quotaoff(
xfs_mount_t *mp,
uint flags)
{
struct xfs_quotainfo *q = mp->m_quotainfo;
uint dqtype;
int error;
uint inactivate_flags;
xfs_qoff_logitem_t *qoffstart;
int nculprits;
/*
* No file system can have quotas enabled on disk but not in core.
* Note that quota utilities (like quotaoff) _expect_
* errno == EEXIST here.
*/
if ((mp->m_qflags & flags) == 0)
return XFS_ERROR(EEXIST);
error = 0;
flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
/*
* We don't want to deal with two quotaoffs messing up each other,
* so we're going to serialize it. quotaoff isn't exactly a performance
* critical thing.
* If quotaoff, then we must be dealing with the root filesystem.
*/
ASSERT(q);
mutex_lock(&q->qi_quotaofflock);
/*
* If we're just turning off quota enforcement, change mp and go.
*/
if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
mp->m_qflags &= ~(flags);
spin_lock(&mp->m_sb_lock);
mp->m_sb.sb_qflags = mp->m_qflags;
spin_unlock(&mp->m_sb_lock);
mutex_unlock(&q->qi_quotaofflock);
/* XXX what to do if error ? Revert back to old vals incore ? */
error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
return (error);
}
dqtype = 0;
inactivate_flags = 0;
/*
* If accounting is off, we must turn enforcement off, clear the
* quota 'CHKD' certificate to make it known that we have to
* do a quotacheck the next time this quota is turned on.
*/
if (flags & XFS_UQUOTA_ACCT) {
dqtype |= XFS_QMOPT_UQUOTA;
flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
inactivate_flags |= XFS_UQUOTA_ACTIVE;
}
if (flags & XFS_GQUOTA_ACCT) {
dqtype |= XFS_QMOPT_GQUOTA;
flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
inactivate_flags |= XFS_GQUOTA_ACTIVE;
} else if (flags & XFS_PQUOTA_ACCT) {
dqtype |= XFS_QMOPT_PQUOTA;
flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
inactivate_flags |= XFS_PQUOTA_ACTIVE;
}
/*
* Nothing to do? Don't complain. This happens when we're just
* turning off quota enforcement.
*/
if ((mp->m_qflags & flags) == 0)
goto out_unlock;
/*
* Write the LI_QUOTAOFF log record, and do SB changes atomically,
* and synchronously. If we fail to write, we should abort the
* operation as it cannot be recovered safely if we crash.
*/
error = xfs_qm_log_quotaoff(mp, &qoffstart, flags);
if (error)
goto out_unlock;
/*
* Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
* to take care of the race between dqget and quotaoff. We don't take
* any special locks to reset these bits. All processes need to check
* these bits *after* taking inode lock(s) to see if the particular
* quota type is in the process of being turned off. If *ACTIVE, it is
* guaranteed that all dquot structures and all quotainode ptrs will all
* stay valid as long as that inode is kept locked.
*
* There is no turning back after this.
*/
mp->m_qflags &= ~inactivate_flags;
/*
* Give back all the dquot reference(s) held by inodes.
* Here we go thru every single incore inode in this file system, and
* do a dqrele on the i_udquot/i_gdquot that it may have.
* Essentially, as long as somebody has an inode locked, this guarantees
* that quotas will not be turned off. This is handy because in a
* transaction once we lock the inode(s) and check for quotaon, we can
* depend on the quota inodes (and other things) being valid as long as
* we keep the lock(s).
*/
xfs_qm_dqrele_all_inodes(mp, flags);
/*
* Next we make the changes in the quota flag in the mount struct.
* This isn't protected by a particular lock directly, because we
* don't want to take a mrlock every time we depend on quotas being on.
*/
mp->m_qflags &= ~(flags);
/*
* Go through all the dquots of this file system and purge them,
* according to what was turned off. We may not be able to get rid
* of all dquots, because dquots can have temporary references that
* are not attached to inodes. eg. xfs_setattr, xfs_create.
* So, if we couldn't purge all the dquots from the filesystem,
* we can't get rid of the incore data structures.
*/
while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype)))
delay(10 * nculprits);
/*
* Transactions that had started before ACTIVE state bit was cleared
* could have logged many dquots, so they'd have higher LSNs than
* the first QUOTAOFF log record does. If we happen to crash when
* the tail of the log has gone past the QUOTAOFF record, but
* before the last dquot modification, those dquots __will__
* recover, and that's not good.
*
* So, we have QUOTAOFF start and end logitems; the start
* logitem won't get overwritten until the end logitem appears...
*/
error = xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
if (error) {
/* We're screwed now. Shutdown is the only option. */
xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
goto out_unlock;
}
/*
* If quotas is completely disabled, close shop.
*/
if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
mutex_unlock(&q->qi_quotaofflock);
xfs_qm_destroy_quotainfo(mp);
return (0);
}
/*
* Release our quotainode references if we don't need them anymore.
*/
if ((dqtype & XFS_QMOPT_UQUOTA) && q->qi_uquotaip) {
IRELE(q->qi_uquotaip);
q->qi_uquotaip = NULL;
}
if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && q->qi_gquotaip) {
IRELE(q->qi_gquotaip);
q->qi_gquotaip = NULL;
}
out_unlock:
mutex_unlock(&q->qi_quotaofflock);
return error;
}
STATIC int
xfs_qm_scall_trunc_qfile(
struct xfs_mount *mp,
xfs_ino_t ino)
{
struct xfs_inode *ip;
struct xfs_trans *tp;
int error;
if (ino == NULLFSINO)
return 0;
error = xfs_iget(mp, NULL, ino, 0, 0, &ip);
if (error)
return error;
xfs_ilock(ip, XFS_IOLOCK_EXCL);
tp = xfs_trans_alloc(mp, XFS_TRANS_TRUNCATE_FILE);
error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
XFS_TRANS_PERM_LOG_RES,
XFS_ITRUNCATE_LOG_COUNT);
if (error) {
xfs_trans_cancel(tp, 0);
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
goto out_put;
}
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
error = xfs_itruncate_data(&tp, ip, 0);
if (error) {
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
XFS_TRANS_ABORT);
goto out_unlock;
}
xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
out_unlock:
xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
out_put:
IRELE(ip);
return error;
}
int
xfs_qm_scall_trunc_qfiles(
xfs_mount_t *mp,
uint flags)
{
int error = 0, error2 = 0;
if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0) {
xfs_debug(mp, "%s: flags=%x m_qflags=%x\n",
__func__, flags, mp->m_qflags);
return XFS_ERROR(EINVAL);
}
if (flags & XFS_DQ_USER)
error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_uquotino);
if (flags & (XFS_DQ_GROUP|XFS_DQ_PROJ))
error2 = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_gquotino);
return error ? error : error2;
}
/*
* Switch on (a given) quota enforcement for a filesystem. This takes
* effect immediately.
* (Switching on quota accounting must be done at mount time.)
*/
int
xfs_qm_scall_quotaon(
xfs_mount_t *mp,
uint flags)
{
int error;
uint qf;
__int64_t sbflags;
flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
/*
* Switching on quota accounting must be done at mount time.
*/
flags &= ~(XFS_ALL_QUOTA_ACCT);
sbflags = 0;
if (flags == 0) {
xfs_debug(mp, "%s: zero flags, m_qflags=%x\n",
__func__, mp->m_qflags);
return XFS_ERROR(EINVAL);
}
/* No fs can turn on quotas with a delayed effect */
ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
/*
* Can't enforce without accounting. We check the superblock
* qflags here instead of m_qflags because rootfs can have
* quota acct on ondisk without m_qflags' knowing.
*/
if (((flags & XFS_UQUOTA_ACCT) == 0 &&
(mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
(flags & XFS_UQUOTA_ENFD))
||
((flags & XFS_PQUOTA_ACCT) == 0 &&
(mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
(flags & XFS_GQUOTA_ACCT) == 0 &&
(mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
(flags & XFS_OQUOTA_ENFD))) {
xfs_debug(mp,
"%s: Can't enforce without acct, flags=%x sbflags=%x\n",
__func__, flags, mp->m_sb.sb_qflags);
return XFS_ERROR(EINVAL);
}
/*
* If everything's up to-date incore, then don't waste time.
*/
if ((mp->m_qflags & flags) == flags)
return XFS_ERROR(EEXIST);
/*
* Change sb_qflags on disk but not incore mp->qflags
* if this is the root filesystem.
*/
spin_lock(&mp->m_sb_lock);
qf = mp->m_sb.sb_qflags;
mp->m_sb.sb_qflags = qf | flags;
spin_unlock(&mp->m_sb_lock);
/*
* There's nothing to change if it's the same.
*/
if ((qf & flags) == flags && sbflags == 0)
return XFS_ERROR(EEXIST);
sbflags |= XFS_SB_QFLAGS;
if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
return (error);
/*
* If we aren't trying to switch on quota enforcement, we are done.
*/
if (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
(mp->m_qflags & XFS_UQUOTA_ACCT)) ||
((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
(mp->m_qflags & XFS_PQUOTA_ACCT)) ||
((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
(mp->m_qflags & XFS_GQUOTA_ACCT)) ||
(flags & XFS_ALL_QUOTA_ENFD) == 0)
return (0);
if (! XFS_IS_QUOTA_RUNNING(mp))
return XFS_ERROR(ESRCH);
/*
* Switch on quota enforcement in core.
*/
mutex_lock(&mp->m_quotainfo->qi_quotaofflock);
mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
mutex_unlock(&mp->m_quotainfo->qi_quotaofflock);
return (0);
}
/*
* Return quota status information, such as uquota-off, enforcements, etc.
*/
int
xfs_qm_scall_getqstat(
struct xfs_mount *mp,
struct fs_quota_stat *out)
{
struct xfs_quotainfo *q = mp->m_quotainfo;
struct xfs_inode *uip, *gip;
boolean_t tempuqip, tempgqip;
uip = gip = NULL;
tempuqip = tempgqip = B_FALSE;
memset(out, 0, sizeof(fs_quota_stat_t));
out->qs_version = FS_QSTAT_VERSION;
if (!xfs_sb_version_hasquota(&mp->m_sb)) {
out->qs_uquota.qfs_ino = NULLFSINO;
out->qs_gquota.qfs_ino = NULLFSINO;
return (0);
}
out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
(XFS_ALL_QUOTA_ACCT|
XFS_ALL_QUOTA_ENFD));
out->qs_pad = 0;
out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
if (q) {
uip = q->qi_uquotaip;
gip = q->qi_gquotaip;
}
if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
0, 0, &uip) == 0)
tempuqip = B_TRUE;
}
if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
0, 0, &gip) == 0)
tempgqip = B_TRUE;
}
if (uip) {
out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
if (tempuqip)
IRELE(uip);
}
if (gip) {
out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
if (tempgqip)
IRELE(gip);
}
if (q) {
out->qs_incoredqs = q->qi_dquots;
out->qs_btimelimit = q->qi_btimelimit;
out->qs_itimelimit = q->qi_itimelimit;
out->qs_rtbtimelimit = q->qi_rtbtimelimit;
out->qs_bwarnlimit = q->qi_bwarnlimit;
out->qs_iwarnlimit = q->qi_iwarnlimit;
}
return 0;
}
#define XFS_DQ_MASK \
(FS_DQ_LIMIT_MASK | FS_DQ_TIMER_MASK | FS_DQ_WARNS_MASK)
/*
* Adjust quota limits, and start/stop timers accordingly.
*/
int
xfs_qm_scall_setqlim(
xfs_mount_t *mp,
xfs_dqid_t id,
uint type,
fs_disk_quota_t *newlim)
{
struct xfs_quotainfo *q = mp->m_quotainfo;
xfs_disk_dquot_t *ddq;
xfs_dquot_t *dqp;
xfs_trans_t *tp;
int error;
xfs_qcnt_t hard, soft;
if (newlim->d_fieldmask & ~XFS_DQ_MASK)
return EINVAL;
if ((newlim->d_fieldmask & XFS_DQ_MASK) == 0)
return 0;
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
0, 0, XFS_DEFAULT_LOG_COUNT))) {
xfs_trans_cancel(tp, 0);
return (error);
}
/*
* We don't want to race with a quotaoff so take the quotaoff lock.
* (We don't hold an inode lock, so there's nothing else to stop
* a quotaoff from happening). (XXXThis doesn't currently happen
* because we take the vfslock before calling xfs_qm_sysent).
*/
mutex_lock(&q->qi_quotaofflock);
/*
* Get the dquot (locked), and join it to the transaction.
* Allocate the dquot if this doesn't exist.
*/
if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
xfs_trans_cancel(tp, XFS_TRANS_ABORT);
ASSERT(error != ENOENT);
goto out_unlock;
}
xfs_trans_dqjoin(tp, dqp);
ddq = &dqp->q_core;
/*
* Make sure that hardlimits are >= soft limits before changing.
*/
hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
(xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
be64_to_cpu(ddq->d_blk_hardlimit);
soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
(xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
be64_to_cpu(ddq->d_blk_softlimit);
if (hard == 0 || hard >= soft) {
ddq->d_blk_hardlimit = cpu_to_be64(hard);
ddq->d_blk_softlimit = cpu_to_be64(soft);
if (id == 0) {
q->qi_bhardlimit = hard;
q->qi_bsoftlimit = soft;
}
} else {
xfs_debug(mp, "blkhard %Ld < blksoft %Ld\n", hard, soft);
}
hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
(xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
be64_to_cpu(ddq->d_rtb_hardlimit);
soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
(xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
be64_to_cpu(ddq->d_rtb_softlimit);
if (hard == 0 || hard >= soft) {
ddq->d_rtb_hardlimit = cpu_to_be64(hard);
ddq->d_rtb_softlimit = cpu_to_be64(soft);
if (id == 0) {
q->qi_rtbhardlimit = hard;
q->qi_rtbsoftlimit = soft;
}
} else {
xfs_debug(mp, "rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
}
hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
(xfs_qcnt_t) newlim->d_ino_hardlimit :
be64_to_cpu(ddq->d_ino_hardlimit);
soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
(xfs_qcnt_t) newlim->d_ino_softlimit :
be64_to_cpu(ddq->d_ino_softlimit);
if (hard == 0 || hard >= soft) {
ddq->d_ino_hardlimit = cpu_to_be64(hard);
ddq->d_ino_softlimit = cpu_to_be64(soft);
if (id == 0) {
q->qi_ihardlimit = hard;
q->qi_isoftlimit = soft;
}
} else {
xfs_debug(mp, "ihard %Ld < isoft %Ld\n", hard, soft);
}
/*
* Update warnings counter(s) if requested
*/
if (newlim->d_fieldmask & FS_DQ_BWARNS)
ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
if (newlim->d_fieldmask & FS_DQ_IWARNS)
ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
if (id == 0) {
/*
* Timelimits for the super user set the relative time
* the other users can be over quota for this file system.
* If it is zero a default is used. Ditto for the default
* soft and hard limit values (already done, above), and
* for warnings.
*/
if (newlim->d_fieldmask & FS_DQ_BTIMER) {
q->qi_btimelimit = newlim->d_btimer;
ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
}
if (newlim->d_fieldmask & FS_DQ_ITIMER) {
q->qi_itimelimit = newlim->d_itimer;
ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
}
if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
q->qi_rtbtimelimit = newlim->d_rtbtimer;
ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
}
if (newlim->d_fieldmask & FS_DQ_BWARNS)
q->qi_bwarnlimit = newlim->d_bwarns;
if (newlim->d_fieldmask & FS_DQ_IWARNS)
q->qi_iwarnlimit = newlim->d_iwarns;
if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
q->qi_rtbwarnlimit = newlim->d_rtbwarns;
} else {
/*
* If the user is now over quota, start the timelimit.
* The user will not be 'warned'.
* Note that we keep the timers ticking, whether enforcement
* is on or off. We don't really want to bother with iterating
* over all ondisk dquots and turning the timers on/off.
*/
xfs_qm_adjust_dqtimers(mp, ddq);
}
dqp->dq_flags |= XFS_DQ_DIRTY;
xfs_trans_log_dquot(tp, dqp);
error = xfs_trans_commit(tp, 0);
xfs_qm_dqrele(dqp);
out_unlock:
mutex_unlock(&q->qi_quotaofflock);
return error;
}
int
xfs_qm_scall_getquota(
xfs_mount_t *mp,
xfs_dqid_t id,
uint type,
fs_disk_quota_t *out)
{
xfs_dquot_t *dqp;
int error;
/*
* Try to get the dquot. We don't want it allocated on disk, so
* we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
* exist, we'll get ENOENT back.
*/
if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
return (error);
}
/*
* If everything's NULL, this dquot doesn't quite exist as far as
* our utility programs are concerned.
*/
if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
xfs_qm_dqput(dqp);
return XFS_ERROR(ENOENT);
}
/*
* Convert the disk dquot to the exportable format
*/
xfs_qm_export_dquot(mp, &dqp->q_core, out);
xfs_qm_dqput(dqp);
return (error ? XFS_ERROR(EFAULT) : 0);
}
STATIC int
xfs_qm_log_quotaoff_end(
xfs_mount_t *mp,
xfs_qoff_logitem_t *startqoff,
uint flags)
{
xfs_trans_t *tp;
int error;
xfs_qoff_logitem_t *qoffi;
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
0, 0, XFS_DEFAULT_LOG_COUNT))) {
xfs_trans_cancel(tp, 0);
return (error);
}
qoffi = xfs_trans_get_qoff_item(tp, startqoff,
flags & XFS_ALL_QUOTA_ACCT);
xfs_trans_log_quotaoff_item(tp, qoffi);
/*
* We have to make sure that the transaction is secure on disk before we
* return and actually stop quota accounting. So, make it synchronous.
* We don't care about quotoff's performance.
*/
xfs_trans_set_sync(tp);
error = xfs_trans_commit(tp, 0);
return (error);
}
STATIC int
xfs_qm_log_quotaoff(
xfs_mount_t *mp,
xfs_qoff_logitem_t **qoffstartp,
uint flags)
{
xfs_trans_t *tp;
int error;
xfs_qoff_logitem_t *qoffi=NULL;
uint oldsbqflag=0;
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
if ((error = xfs_trans_reserve(tp, 0,
sizeof(xfs_qoff_logitem_t) * 2 +
mp->m_sb.sb_sectsize + 128,
0,
0,
XFS_DEFAULT_LOG_COUNT))) {
goto error0;
}
qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
xfs_trans_log_quotaoff_item(tp, qoffi);
spin_lock(&mp->m_sb_lock);
oldsbqflag = mp->m_sb.sb_qflags;
mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
spin_unlock(&mp->m_sb_lock);
xfs_mod_sb(tp, XFS_SB_QFLAGS);
/*
* We have to make sure that the transaction is secure on disk before we
* return and actually stop quota accounting. So, make it synchronous.
* We don't care about quotoff's performance.
*/
xfs_trans_set_sync(tp);
error = xfs_trans_commit(tp, 0);
error0:
if (error) {
xfs_trans_cancel(tp, 0);
/*
* No one else is modifying sb_qflags, so this is OK.
* We still hold the quotaofflock.
*/
spin_lock(&mp->m_sb_lock);
mp->m_sb.sb_qflags = oldsbqflag;
spin_unlock(&mp->m_sb_lock);
}
*qoffstartp = qoffi;
return (error);
}
/*
* Translate an internal style on-disk-dquot to the exportable format.
* The main differences are that the counters/limits are all in Basic
* Blocks (BBs) instead of the internal FSBs, and all on-disk data has
* to be converted to the native endianness.
*/
STATIC void
xfs_qm_export_dquot(
xfs_mount_t *mp,
xfs_disk_dquot_t *src,
struct fs_disk_quota *dst)
{
memset(dst, 0, sizeof(*dst));
dst->d_version = FS_DQUOT_VERSION; /* different from src->d_version */
dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
dst->d_id = be32_to_cpu(src->d_id);
dst->d_blk_hardlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
dst->d_blk_softlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
dst->d_icount = be64_to_cpu(src->d_icount);
dst->d_btimer = be32_to_cpu(src->d_btimer);
dst->d_itimer = be32_to_cpu(src->d_itimer);
dst->d_iwarns = be16_to_cpu(src->d_iwarns);
dst->d_bwarns = be16_to_cpu(src->d_bwarns);
dst->d_rtb_hardlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
dst->d_rtb_softlimit =
XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
/*
* Internally, we don't reset all the timers when quota enforcement
* gets turned off. No need to confuse the user level code,
* so return zeroes in that case.
*/
if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
(!XFS_IS_OQUOTA_ENFORCED(mp) &&
(src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
dst->d_btimer = 0;
dst->d_itimer = 0;
dst->d_rtbtimer = 0;
}
#ifdef DEBUG
if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) ||
(XFS_IS_OQUOTA_ENFORCED(mp) &&
(dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) &&
dst->d_id != 0) {
if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
(dst->d_blk_softlimit > 0)) {
ASSERT(dst->d_btimer != 0);
}
if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
(dst->d_ino_softlimit > 0)) {
ASSERT(dst->d_itimer != 0);
}
}
#endif
}
STATIC uint
xfs_qm_export_qtype_flags(
uint flags)
{
/*
* Can't be more than one, or none.
*/
ASSERT((flags & (FS_PROJ_QUOTA | FS_USER_QUOTA)) !=
(FS_PROJ_QUOTA | FS_USER_QUOTA));
ASSERT((flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)) !=
(FS_PROJ_QUOTA | FS_GROUP_QUOTA));
ASSERT((flags & (FS_USER_QUOTA | FS_GROUP_QUOTA)) !=
(FS_USER_QUOTA | FS_GROUP_QUOTA));
ASSERT((flags & (FS_PROJ_QUOTA|FS_USER_QUOTA|FS_GROUP_QUOTA)) != 0);
return (flags & XFS_DQ_USER) ?
FS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
FS_PROJ_QUOTA : FS_GROUP_QUOTA;
}
STATIC uint
xfs_qm_export_flags(
uint flags)
{
uint uflags;
uflags = 0;
if (flags & XFS_UQUOTA_ACCT)
uflags |= FS_QUOTA_UDQ_ACCT;
if (flags & XFS_PQUOTA_ACCT)
uflags |= FS_QUOTA_PDQ_ACCT;
if (flags & XFS_GQUOTA_ACCT)
uflags |= FS_QUOTA_GDQ_ACCT;
if (flags & XFS_UQUOTA_ENFD)
uflags |= FS_QUOTA_UDQ_ENFD;
if (flags & (XFS_OQUOTA_ENFD)) {
uflags |= (flags & XFS_GQUOTA_ACCT) ?
FS_QUOTA_GDQ_ENFD : FS_QUOTA_PDQ_ENFD;
}
return (uflags);
}
STATIC int
xfs_dqrele_inode(
struct xfs_inode *ip,
struct xfs_perag *pag,
int flags)
{
/* skip quota inodes */
if (ip == ip->i_mount->m_quotainfo->qi_uquotaip ||
ip == ip->i_mount->m_quotainfo->qi_gquotaip) {
ASSERT(ip->i_udquot == NULL);
ASSERT(ip->i_gdquot == NULL);
return 0;
}
xfs_ilock(ip, XFS_ILOCK_EXCL);
if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
xfs_qm_dqrele(ip->i_udquot);
ip->i_udquot = NULL;
}
if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
xfs_qm_dqrele(ip->i_gdquot);
ip->i_gdquot = NULL;
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
return 0;
}
/*
* Go thru all the inodes in the file system, releasing their dquots.
*
* Note that the mount structure gets modified to indicate that quotas are off
* AFTER this, in the case of quotaoff.
*/
void
xfs_qm_dqrele_all_inodes(
struct xfs_mount *mp,
uint flags)
{
ASSERT(mp->m_quotainfo);
xfs_inode_ag_iterator(mp, xfs_dqrele_inode, flags);
}
Reference in New Issue View Git Blame Copy Permalink