aboutsummaryrefslogtreecommitdiffstats
path: root/init
Commit message (Expand)AuthorAge
* [PATCH] md: remove MAX_MD_DEVS which is an arbitrary limitNeilBrown2006-10-03
* [PATCH] replace cad_pid by a struct pidCedric Le Goater2006-10-02
* [PATCH] introduce kernel_execveArnd Bergmann2006-10-02
* [PATCH] IPC namespace coreKirill Korotaev2006-10-02
* [PATCH] namespaces: utsname: implement utsname namespacesSerge E. Hallyn2006-10-02
* [PATCH] csa: Extended system accounting over taskstatsJay Lan2006-10-01
* [PATCH] fix EMBEDDED + SYSCTL menuRandy Dunlap2006-10-01
* [PATCH] allow /proc/config.gz to be built as a moduleRoss Biro2006-10-01
* [PATCH] BLOCK: Make it possible to disable the block layer [try #6]David Howells2006-09-30
* [PATCH] sysctl: Allow /proc/sys without sys_sysctlEric W. Biederman2006-09-27
* [PATCH] kdump: introduce "reset_devices" command line optionVivek Goyal2006-09-27
* Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6Linus Torvalds2006-09-26
|\
| * [PATCH] Move unwind_init earlierAndi Kleen2006-09-26
| * [PATCH] Allow early_param and identical __setup to existRusty Russell2006-09-26
* | Driver Core: add ability for drivers to do a threaded probeGreg Kroah-Hartman2006-09-26
|/
* [PATCH] Kconfig: move CONFIG_EMBEDDED options to submenuChuck Ebbert2006-09-16
* [PATCH] per-task-delay-accounting: delay accounting usage of taskstats interfaceShailabh Nagar2006-07-15
* [PATCH] per-task-delay-accounting: taskstats interfaceShailabh Nagar2006-07-15
* [PATCH] per-task-delay-accounting: setupShailabh Nagar2006-07-15
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds2006-07-04
|\
| * kbuild: introduce utsrelease.hSam Ravnborg2006-07-03
* | [PATCH] lockdep: annotate genirqIngo Molnar2006-07-03
* | [PATCH] lockdep: coreIngo Molnar2006-07-03
* | [PATCH] lockdep: better lock debuggingIngo Molnar2006-07-03
* | [PATCH] lockdep: console_init after local_irq_enable()Heiko Carstens2006-07-03
* | [PATCH] time initialisation fixjohn stultz2006-07-03
|/
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2006-06-30
|\
| * Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
* | [PATCH] UML: fix the INIT_ENV_ARG_LIMIT dependenciesAdrian Bunk2006-06-30
* | [PATCH] add smp_setup_processor_id()Andrew Morton2006-06-30
* | [PATCH] Light weight event countersChristoph Lameter2006-06-30
|/
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6Linus Torvalds2006-06-29
|\
| * [PATCH] devfs: Remove the devfs_fs_kernel.h file from the treeGreg Kroah-Hartman2006-06-26
| * [PATCH] devfs: Remove devfs from the init codeGreg Kroah-Hartman2006-06-26
* | [PATCH] pi-futex: rt mutex coreIngo Molnar2006-06-27
* | [PATCH] fs/buffer.c: cleanupsAdrian Bunk2006-06-27
|/
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds2006-06-26
|\
| * kconfig: add defconfig_list/module optionRoman Zippel2006-06-09
* | Merge branch 'x86-64'Linus Torvalds2006-06-26
|\ \
| * | [PATCH] x86_64: Move VM86 config into arch/i386/KconfigAndi Kleen2006-06-26
| * | [PATCH] x86_64: reliable stack trace supportJan Beulich2006-06-26
* | | [PATCH] initramfs overwrite fixH. Peter Anvin2006-06-26
* | | [PATCH] Time: Use clocksource infrastructure for update_wall_timejohn stultz2006-06-26
|/ /
* | [PATCH] Make sysctl obligatory except under CONFIG_EMBEDDEDH. Peter Anvin2006-06-25
* | Merge branch 'audit.b21' of git://git.kernel.org/pub/scm/linux/kernel/git/vir...Linus Torvalds2006-06-20
|\ \
| * | [PATCH] audit: path-based rulesAmy Griffis2006-06-20
| |/
* | [MTD] Allow alternate JFFS2 mount variant for root filesystem.Joern Engel2006-05-30
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6David Woodhouse2006-05-15
|\|
| * [PATCH] root mount failure: emit filesystems attemptedAndy Whitcroft2006-05-15
| * [PATCH] initramfs: fix CPIO hardlink checkMark Huang2006-05-15
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-09 06:31:26 -0400
f='#n700'>700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 
/*
 * 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_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_inode_item.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);

/*
 * 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 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.
	 */
	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 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);

	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 = 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;
}

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);
}


int
xfs_qm_scall_getquota(
	struct xfs_mount	*mp,
	xfs_dqid_t		id,
	uint			type,
	struct fs_disk_quota	*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 = XFS_ERROR(ENOENT);
		goto out_put;
	}

	memset(dst, 0, sizeof(*dst));
	dst->d_version = FS_DQUOT_VERSION;
	dst->d_flags = xfs_qm_export_qtype_flags(dqp->q_core.d_flags);
	dst->d_id = be32_to_cpu(dqp->q_core.d_id);
	dst->d_blk_hardlimit =
		XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_blk_hardlimit));
	dst->d_blk_softlimit =
		XFS_FSB_TO_BB(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_bcount = XFS_FSB_TO_BB(mp, dqp->q_res_bcount);
	dst->d_icount = dqp->q_res_icount;
	dst->d_btimer = be32_to_cpu(dqp->q_core.d_btimer);
	dst->d_itimer = be32_to_cpu(dqp->q_core.d_itimer);
	dst->d_iwarns = be16_to_cpu(dqp->q_core.d_iwarns);
	dst->d_bwarns = be16_to_cpu(dqp->q_core.d_bwarns);
	dst->d_rtb_hardlimit =
		XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_rtb_hardlimit));
	dst->d_rtb_softlimit =
		XFS_FSB_TO_BB(mp, be64_to_cpu(dqp->q_core.d_rtb_softlimit));
	dst->d_rtbcount = XFS_FSB_TO_BB(mp, dqp->q_res_rtbcount);
	dst->d_rtbtimer = be32_to_cpu(dqp->q_core.d_rtbtimer);
	dst->d_rtbwarns = 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_OQUOTA_ENFORCED(mp) &&
			(dqp->q_core.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
out_put:
	xfs_qm_dqput(dqp);
	return error;
}

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);
}
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-09 06:31:24 -0400