summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_qm_syscalls.c
diff options
context:
space:
mode:
authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/xfs/xfs_qm_syscalls.c
Initial import
Diffstat (limited to 'fs/xfs/xfs_qm_syscalls.c')
-rw-r--r--fs/xfs/xfs_qm_syscalls.c770
1 files changed, 770 insertions, 0 deletions
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
new file mode 100644
index 000000000..9a25c9275
--- /dev/null
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -0,0 +1,770 @@
+/*
+ * 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_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_bit.h"
+#include "xfs_sb.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_trans.h"
+#include "xfs_error.h"
+#include "xfs_quota.h"
+#include "xfs_qm.h"
+#include "xfs_trace.h"
+#include "xfs_icache.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);
+
+/*
+ * 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;
+
+ /*
+ * 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 -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 ? */
+ return xfs_sync_sb(mp, false);
+ }
+
+ 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_GQUOTA_CHKD | XFS_GQUOTA_ENFD);
+ inactivate_flags |= XFS_GQUOTA_ACTIVE;
+ }
+ if (flags & XFS_PQUOTA_ACCT) {
+ dqtype |= XFS_QMOPT_PQUOTA;
+ flags |= (XFS_PQUOTA_CHKD | XFS_PQUOTA_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.
+ */
+ xfs_qm_dqpurge_all(mp, dqtype);
+
+ /*
+ * 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 all quotas are completely turned off, close shop.
+ */
+ if (mp->m_qflags == 0) {
+ 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) && q->qi_gquotaip) {
+ IRELE(q->qi_gquotaip);
+ q->qi_gquotaip = NULL;
+ }
+ if ((dqtype & XFS_QMOPT_PQUOTA) && q->qi_pquotaip) {
+ IRELE(q->qi_pquotaip);
+ q->qi_pquotaip = 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, &M_RES(mp)->tr_itruncate, 0, 0);
+ 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);
+
+ ip->i_d.di_size = 0;
+ xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+
+ error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, 0);
+ if (error) {
+ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
+ XFS_TRANS_ABORT);
+ goto out_unlock;
+ }
+
+ ASSERT(ip->i_d.di_nextents == 0);
+
+ 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 = -EINVAL;
+
+ if (!xfs_sb_version_hasquota(&mp->m_sb) || flags == 0 ||
+ (flags & ~XFS_DQ_ALLTYPES)) {
+ xfs_debug(mp, "%s: flags=%x m_qflags=%x",
+ __func__, flags, mp->m_qflags);
+ return -EINVAL;
+ }
+
+ if (flags & XFS_DQ_USER) {
+ error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_uquotino);
+ if (error)
+ return error;
+ }
+ if (flags & XFS_DQ_GROUP) {
+ error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_gquotino);
+ if (error)
+ return error;
+ }
+ if (flags & XFS_DQ_PROJ)
+ error = xfs_qm_scall_trunc_qfile(mp, mp->m_sb.sb_pquotino);
+
+ return error;
+}
+
+/*
+ * 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;
+
+ flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
+ /*
+ * Switching on quota accounting must be done at mount time.
+ */
+ flags &= ~(XFS_ALL_QUOTA_ACCT);
+
+ if (flags == 0) {
+ xfs_debug(mp, "%s: zero flags, m_qflags=%x",
+ __func__, mp->m_qflags);
+ return -EINVAL;
+ }
+
+ /*
+ * 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 (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
+ (flags & XFS_UQUOTA_ENFD)) ||
+ ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
+ (flags & XFS_GQUOTA_ENFD)) ||
+ ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
+ (flags & XFS_PQUOTA_ENFD))) {
+ xfs_debug(mp,
+ "%s: Can't enforce without acct, flags=%x sbflags=%x",
+ __func__, flags, mp->m_sb.sb_qflags);
+ return -EINVAL;
+ }
+ /*
+ * If everything's up to-date incore, then don't waste time.
+ */
+ if ((mp->m_qflags & flags) == flags)
+ return -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)
+ return -EEXIST;
+
+ error = xfs_sync_sb(mp, false);
+ if (error)
+ 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)))
+ return 0;
+
+ if (! XFS_IS_QUOTA_RUNNING(mp))
+ return -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;
+}
+
+#define XFS_QC_MASK \
+ (QC_LIMIT_MASK | QC_TIMER_MASK | QC_WARNS_MASK)
+
+/*
+ * Adjust quota limits, and start/stop timers accordingly.
+ */
+int
+xfs_qm_scall_setqlim(
+ struct xfs_mount *mp,
+ xfs_dqid_t id,
+ uint type,
+ struct qc_dqblk *newlim)
+{
+ struct xfs_quotainfo *q = mp->m_quotainfo;
+ struct xfs_disk_dquot *ddq;
+ struct xfs_dquot *dqp;
+ struct xfs_trans *tp;
+ int error;
+ xfs_qcnt_t hard, soft;
+
+ if (newlim->d_fieldmask & ~XFS_QC_MASK)
+ return -EINVAL;
+ if ((newlim->d_fieldmask & XFS_QC_MASK) == 0)
+ return 0;
+
+ /*
+ * 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.
+ */
+ mutex_lock(&q->qi_quotaofflock);
+
+ /*
+ * Get the dquot (locked) before we start, as we need to do a
+ * transaction to allocate it if it doesn't exist. Once we have the
+ * dquot, unlock it so we can start the next transaction safely. We hold
+ * a reference to the dquot, so it's safe to do this unlock/lock without
+ * it being reclaimed in the mean time.
+ */
+ error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp);
+ if (error) {
+ ASSERT(error != -ENOENT);
+ goto out_unlock;
+ }
+ xfs_dqunlock(dqp);
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_setqlim, 0, 0);
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ goto out_rele;
+ }
+
+ xfs_dqlock(dqp);
+ xfs_trans_dqjoin(tp, dqp);
+ ddq = &dqp->q_core;
+
+ /*
+ * Make sure that hardlimits are >= soft limits before changing.
+ */
+ hard = (newlim->d_fieldmask & QC_SPC_HARD) ?
+ (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_hardlimit) :
+ be64_to_cpu(ddq->d_blk_hardlimit);
+ soft = (newlim->d_fieldmask & QC_SPC_SOFT) ?
+ (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_spc_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);
+ xfs_dquot_set_prealloc_limits(dqp);
+ if (id == 0) {
+ q->qi_bhardlimit = hard;
+ q->qi_bsoftlimit = soft;
+ }
+ } else {
+ xfs_debug(mp, "blkhard %Ld < blksoft %Ld", hard, soft);
+ }
+ hard = (newlim->d_fieldmask & QC_RT_SPC_HARD) ?
+ (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_hardlimit) :
+ be64_to_cpu(ddq->d_rtb_hardlimit);
+ soft = (newlim->d_fieldmask & QC_RT_SPC_SOFT) ?
+ (xfs_qcnt_t) XFS_B_TO_FSB(mp, newlim->d_rt_spc_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", hard, soft);
+ }
+
+ hard = (newlim->d_fieldmask & QC_INO_HARD) ?
+ (xfs_qcnt_t) newlim->d_ino_hardlimit :
+ be64_to_cpu(ddq->d_ino_hardlimit);
+ soft = (newlim->d_fieldmask & QC_INO_SOFT) ?
+ (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", hard, soft);
+ }
+
+ /*
+ * Update warnings counter(s) if requested
+ */
+ if (newlim->d_fieldmask & QC_SPC_WARNS)
+ ddq->d_bwarns = cpu_to_be16(newlim->d_spc_warns);
+ if (newlim->d_fieldmask & QC_INO_WARNS)
+ ddq->d_iwarns = cpu_to_be16(newlim->d_ino_warns);
+ if (newlim->d_fieldmask & QC_RT_SPC_WARNS)
+ ddq->d_rtbwarns = cpu_to_be16(newlim->d_rt_spc_warns);
+
+ 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 & QC_SPC_TIMER) {
+ q->qi_btimelimit = newlim->d_spc_timer;
+ ddq->d_btimer = cpu_to_be32(newlim->d_spc_timer);
+ }
+ if (newlim->d_fieldmask & QC_INO_TIMER) {
+ q->qi_itimelimit = newlim->d_ino_timer;
+ ddq->d_itimer = cpu_to_be32(newlim->d_ino_timer);
+ }
+ if (newlim->d_fieldmask & QC_RT_SPC_TIMER) {
+ q->qi_rtbtimelimit = newlim->d_rt_spc_timer;
+ ddq->d_rtbtimer = cpu_to_be32(newlim->d_rt_spc_timer);
+ }
+ if (newlim->d_fieldmask & QC_SPC_WARNS)
+ q->qi_bwarnlimit = newlim->d_spc_warns;
+ if (newlim->d_fieldmask & QC_INO_WARNS)
+ q->qi_iwarnlimit = newlim->d_ino_warns;
+ if (newlim->d_fieldmask & QC_RT_SPC_WARNS)
+ q->qi_rtbwarnlimit = newlim->d_rt_spc_warns;
+ } 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);
+
+out_rele:
+ xfs_qm_dqrele(dqp);
+out_unlock:
+ mutex_unlock(&q->qi_quotaofflock);
+ return error;
+}
+
+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);
+
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_equotaoff, 0, 0);
+ if (error) {
+ 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;
+
+ *qoffstartp = NULL;
+
+ tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_quotaoff, 0, 0);
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ goto out;
+ }
+
+ 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);
+ mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
+ spin_unlock(&mp->m_sb_lock);
+
+ xfs_log_sb(tp);
+
+ /*
+ * 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);
+ if (error)
+ goto out;
+
+ *qoffstartp = qoffi;
+out:
+ return error;
+}
+
+
+int
+xfs_qm_scall_getquota(
+ struct xfs_mount *mp,
+ xfs_dqid_t id,
+ uint type,
+ struct qc_dqblk *dst)
+{
+ struct xfs_dquot *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.
+ */
+ error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp);
+ if (error)
+ 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)) {
+ error = -ENOENT;
+ goto out_put;
+ }
+
+ memset(dst, 0, sizeof(*dst));
+ dst->d_spc_hardlimit =
+ XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_blk_hardlimit));
+ dst->d_spc_softlimit =
+ XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_blk_softlimit));
+ dst->d_ino_hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
+ dst->d_ino_softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
+ dst->d_space = XFS_FSB_TO_B(mp, dqp->q_res_bcount);
+ dst->d_ino_count = dqp->q_res_icount;
+ dst->d_spc_timer = be32_to_cpu(dqp->q_core.d_btimer);
+ dst->d_ino_timer = be32_to_cpu(dqp->q_core.d_itimer);
+ dst->d_ino_warns = be16_to_cpu(dqp->q_core.d_iwarns);
+ dst->d_spc_warns = be16_to_cpu(dqp->q_core.d_bwarns);
+ dst->d_rt_spc_hardlimit =
+ XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_hardlimit));
+ dst->d_rt_spc_softlimit =
+ XFS_FSB_TO_B(mp, be64_to_cpu(dqp->q_core.d_rtb_softlimit));
+ dst->d_rt_space = XFS_FSB_TO_B(mp, dqp->q_res_rtbcount);
+ dst->d_rt_spc_timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
+ dst->d_rt_spc_warns = be16_to_cpu(dqp->q_core.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) &&
+ dqp->q_core.d_flags == XFS_DQ_USER) ||
+ (!XFS_IS_GQUOTA_ENFORCED(mp) &&
+ dqp->q_core.d_flags == XFS_DQ_GROUP) ||
+ (!XFS_IS_PQUOTA_ENFORCED(mp) &&
+ dqp->q_core.d_flags == XFS_DQ_PROJ)) {
+ dst->d_spc_timer = 0;
+ dst->d_ino_timer = 0;
+ dst->d_rt_spc_timer = 0;
+ }
+
+#ifdef DEBUG
+ if (((XFS_IS_UQUOTA_ENFORCED(mp) && type == XFS_DQ_USER) ||
+ (XFS_IS_GQUOTA_ENFORCED(mp) && type == XFS_DQ_GROUP) ||
+ (XFS_IS_PQUOTA_ENFORCED(mp) && type == XFS_DQ_PROJ)) &&
+ id != 0) {
+ if ((dst->d_space > dst->d_spc_softlimit) &&
+ (dst->d_spc_softlimit > 0)) {
+ ASSERT(dst->d_spc_timer != 0);
+ }
+ if ((dst->d_ino_count > dst->d_ino_softlimit) &&
+ (dst->d_ino_softlimit > 0)) {
+ ASSERT(dst->d_ino_timer != 0);
+ }
+ }
+#endif
+out_put:
+ xfs_qm_dqput(dqp);
+ return error;
+}
+
+
+STATIC int
+xfs_dqrele_inode(
+ struct xfs_inode *ip,
+ int flags,
+ void *args)
+{
+ /* skip quota inodes */
+ if (ip == ip->i_mount->m_quotainfo->qi_uquotaip ||
+ ip == ip->i_mount->m_quotainfo->qi_gquotaip ||
+ ip == ip->i_mount->m_quotainfo->qi_pquotaip) {
+ ASSERT(ip->i_udquot == NULL);
+ ASSERT(ip->i_gdquot == NULL);
+ ASSERT(ip->i_pdquot == 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_GQUOTA_ACCT) && ip->i_gdquot) {
+ xfs_qm_dqrele(ip->i_gdquot);
+ ip->i_gdquot = NULL;
+ }
+ if ((flags & XFS_PQUOTA_ACCT) && ip->i_pdquot) {
+ xfs_qm_dqrele(ip->i_pdquot);
+ ip->i_pdquot = 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, NULL);
+}