Esempio n. 1
0
/*
 * Starting at @id and progressing upwards, look for an initialized incore
 * dquot, lock it, and return it.
 */
int
xfs_qm_dqget_next(
	struct xfs_mount	*mp,
	xfs_dqid_t		id,
	uint			type,
	struct xfs_dquot	**dqpp)
{
	struct xfs_dquot	*dqp;
	int			error = 0;

	*dqpp = NULL;
	for (; !error; error = xfs_dq_get_next_id(mp, type, &id)) {
		error = xfs_qm_dqget(mp, id, type, false, &dqp);
		if (error == -ENOENT)
			continue;
		else if (error != 0)
			break;

		if (!XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
			*dqpp = dqp;
			return 0;
		}

		xfs_qm_dqput(dqp);
	}

	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);
	}
	/* xfs_qm_dqprint(dqp); */
	/*
	 * 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);
}
Esempio n. 3
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/*
 * Called by dqusage_adjust in doing a quotacheck.
 *
 * Given the inode, and a dquot id this updates both the incore dqout as well
 * as the buffer copy. This is so that once the quotacheck is done, we can
 * just log all the buffers, as opposed to logging numerous updates to
 * individual dquots.
 */
STATIC int
xfs_qm_quotacheck_dqadjust(
	struct xfs_inode	*ip,
	xfs_dqid_t		id,
	uint			type,
	xfs_qcnt_t		nblks,
	xfs_qcnt_t		rtblks)
{
	struct xfs_mount	*mp = ip->i_mount;
	struct xfs_dquot	*dqp;
	int			error;

	error = xfs_qm_dqget(mp, ip, id, type,
			     XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
	if (error) {
		/*
		 * Shouldn't be able to turn off quotas here.
		 */
		ASSERT(error != ESRCH);
		ASSERT(error != ENOENT);
		return error;
	}

	trace_xfs_dqadjust(dqp);

	/*
	 * Adjust the inode count and the block count to reflect this inode's
	 * resource usage.
	 */
	be64_add_cpu(&dqp->q_core.d_icount, 1);
	dqp->q_res_icount++;
	if (nblks) {
		be64_add_cpu(&dqp->q_core.d_bcount, nblks);
		dqp->q_res_bcount += nblks;
	}
	if (rtblks) {
		be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
		dqp->q_res_rtbcount += rtblks;
	}

	/*
	 * Set default limits, adjust timers (since we changed usages)
	 *
	 * There are no timers for the default values set in the root dquot.
	 */
	if (dqp->q_core.d_id) {
		xfs_qm_adjust_dqlimits(mp, &dqp->q_core);
		xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
	}

	dqp->dq_flags |= XFS_DQ_DIRTY;
	xfs_qm_dqput(dqp);
	return 0;
}
/*
 * Directory tree accounting is implemented using project quotas, where
 * the project identifier is inherited from parent directories.
 * A statvfs (df, etc.) of a directory that is using project quota should
 * return a statvfs of the project, not the entire filesystem.
 * This makes such trees appear as if they are filesystems in themselves.
 */
void
xfs_qm_statvfs(
	xfs_inode_t		*ip,
	struct kstatfs		*statp)
{
	xfs_mount_t		*mp = ip->i_mount;
	xfs_dquot_t		*dqp;

	if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
		xfs_fill_statvfs_from_dquot(statp, dqp);
		xfs_qm_dqput(dqp);
	}
}
Esempio n. 5
0
STATIC void
xfs_dqtest_cmp(
	xfs_dqtest_t	*d)
{
	xfs_dquot_t	*dqp;
	int		error;

	/* xfs_qm_dqtest_print(d); */
	if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
				 &dqp))) {
		xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
		return;
	}
	xfs_dqtest_cmp2(d, dqp);
	xfs_qm_dqput(dqp);
}
Esempio n. 6
0
STATIC int
xfs_qm_dqattach_one(
	xfs_inode_t	*ip,
	xfs_dqid_t	id,
	uint		type,
	uint		doalloc,
	xfs_dquot_t	**IO_idqpp)
{
	xfs_dquot_t	*dqp;
	int		error;

	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
	error = 0;

	/*
	 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
	 * or &i_gdquot. This made the code look weird, but made the logic a lot
	 * simpler.
	 */
	dqp = *IO_idqpp;
	if (dqp) {
		trace_xfs_dqattach_found(dqp);
		return 0;
	}

	/*
	 * Find the dquot from somewhere. This bumps the reference count of
	 * dquot and returns it locked.  This can return ENOENT if dquot didn't
	 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
	 * turned off suddenly.
	 */
	error = xfs_qm_dqget(ip->i_mount, ip, id, type,
			     doalloc | XFS_QMOPT_DOWARN, &dqp);
	if (error)
		return error;

	trace_xfs_dqattach_get(dqp);

	/*
	 * dqget may have dropped and re-acquired the ilock, but it guarantees
	 * that the dquot returned is the one that should go in the inode.
	 */
	*IO_idqpp = dqp;
	xfs_dqunlock(dqp);
	return 0;
}
Esempio n. 7
0
/*
 * Adjust quota limits, and start/stop timers accordingly.
 */
STATIC int
xfs_qm_scall_setqlim(
	xfs_mount_t		*mp,
	xfs_dqid_t		id,
	uint			type,
	fs_disk_quota_t		*newlim)
{
	xfs_disk_dquot_t	*ddq;
	xfs_dquot_t		*dqp;
	xfs_trans_t		*tp;
	int			error;
	xfs_qcnt_t		hard, soft;

	if (!capable(CAP_SYS_ADMIN))
		return XFS_ERROR(EPERM);

	if ((newlim->d_fieldmask &
	    (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_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(&(XFS_QI_QOFFLOCK(mp)));

	/*
	 * 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);
		mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
		ASSERT(error != ENOENT);
		return (error);
	}
	xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
	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) {
			mp->m_quotainfo->qi_bhardlimit = hard;
			mp->m_quotainfo->qi_bsoftlimit = soft;
		}
	} else {
		qdprintk("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) {
			mp->m_quotainfo->qi_rtbhardlimit = hard;
			mp->m_quotainfo->qi_rtbsoftlimit = soft;
		}
	} else {
		qdprintk("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) {
			mp->m_quotainfo->qi_ihardlimit = hard;
			mp->m_quotainfo->qi_isoftlimit = soft;
		}
	} else {
		qdprintk("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) {
			mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
			ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
		}
		if (newlim->d_fieldmask & FS_DQ_ITIMER) {
			mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
			ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
		}
		if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
			mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
			ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
		}
		if (newlim->d_fieldmask & FS_DQ_BWARNS)
			mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
		if (newlim->d_fieldmask & FS_DQ_IWARNS)
			mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
		if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
			mp->m_quotainfo->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);

	xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
	xfs_trans_commit(tp, 0, NULL);
	xfs_qm_dqprint(dqp);
	xfs_qm_dqrele(dqp);
	mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));

	return (0);
}
Esempio n. 8
0
STATIC int
xfs_qm_dqattach_one(
	xfs_inode_t	*ip,
	xfs_dqid_t	id,
	uint		type,
	uint		doalloc,
	xfs_dquot_t	*udqhint, /* hint */
	xfs_dquot_t	**IO_idqpp)
{
	xfs_dquot_t	*dqp;
	int		error;

	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
	error = 0;

	/*
	 * See if we already have it in the inode itself. IO_idqpp is
	 * &i_udquot or &i_gdquot. This made the code look weird, but
	 * made the logic a lot simpler.
	 */
	dqp = *IO_idqpp;
	if (dqp) {
		trace_xfs_dqattach_found(dqp);
		return 0;
	}

	/*
	 * udqhint is the i_udquot field in inode, and is non-NULL only
	 * when the type arg is group/project. Its purpose is to save a
	 * lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
	 * the user dquot.
	 */
	if (udqhint) {
		ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
		xfs_dqlock(udqhint);

		/*
		 * No need to take dqlock to look at the id.
		 *
		 * The ID can't change until it gets reclaimed, and it won't
		 * be reclaimed as long as we have a ref from inode and we
		 * hold the ilock.
		 */
		dqp = udqhint->q_gdquot;
		if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
			ASSERT(*IO_idqpp == NULL);

			*IO_idqpp = xfs_qm_dqhold(dqp);
			xfs_dqunlock(udqhint);
			return 0;
		}

		/*
		 * We can't hold a dquot lock when we call the dqget code.
		 * We'll deadlock in no time, because of (not conforming to)
		 * lock ordering - the inodelock comes before any dquot lock,
		 * and we may drop and reacquire the ilock in xfs_qm_dqget().
		 */
		xfs_dqunlock(udqhint);
	}

	/*
	 * Find the dquot from somewhere. This bumps the
	 * reference count of dquot and returns it locked.
	 * This can return ENOENT if dquot didn't exist on
	 * disk and we didn't ask it to allocate;
	 * ESRCH if quotas got turned off suddenly.
	 */
	error = xfs_qm_dqget(ip->i_mount, ip, id, type,
			     doalloc | XFS_QMOPT_DOWARN, &dqp);
	if (error)
		return error;

	trace_xfs_dqattach_get(dqp);

	/*
	 * dqget may have dropped and re-acquired the ilock, but it guarantees
	 * that the dquot returned is the one that should go in the inode.
	 */
	*IO_idqpp = dqp;
	xfs_dqunlock(dqp);
	return 0;
}
Esempio n. 9
0
/*
 * Given an inode, a uid, gid and prid make sure that we have
 * allocated relevant dquot(s) on disk, and that we won't exceed inode
 * quotas by creating this file.
 * This also attaches dquot(s) to the given inode after locking it,
 * and returns the dquots corresponding to the uid and/or gid.
 *
 * in	: inode (unlocked)
 * out	: udquot, gdquot with references taken and unlocked
 */
int
xfs_qm_vop_dqalloc(
	struct xfs_inode	*ip,
	uid_t			uid,
	gid_t			gid,
	prid_t			prid,
	uint			flags,
	struct xfs_dquot	**O_udqpp,
	struct xfs_dquot	**O_gdqpp)
{
	struct xfs_mount	*mp = ip->i_mount;
	struct xfs_dquot	*uq, *gq;
	int			error;
	uint			lockflags;

	if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
		return 0;

	lockflags = XFS_ILOCK_EXCL;
	xfs_ilock(ip, lockflags);

	if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
		gid = ip->i_d.di_gid;

	/*
	 * Attach the dquot(s) to this inode, doing a dquot allocation
	 * if necessary. The dquot(s) will not be locked.
	 */
	if (XFS_NOT_DQATTACHED(mp, ip)) {
		error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
		if (error) {
			xfs_iunlock(ip, lockflags);
			return error;
		}
	}

	uq = gq = NULL;
	if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
		if (ip->i_d.di_uid != uid) {
			/*
			 * What we need is the dquot that has this uid, and
			 * if we send the inode to dqget, the uid of the inode
			 * takes priority over what's sent in the uid argument.
			 * We must unlock inode here before calling dqget if
			 * we're not sending the inode, because otherwise
			 * we'll deadlock by doing trans_reserve while
			 * holding ilock.
			 */
			xfs_iunlock(ip, lockflags);
			if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
						 XFS_DQ_USER,
						 XFS_QMOPT_DQALLOC |
						 XFS_QMOPT_DOWARN,
						 &uq))) {
				ASSERT(error != ENOENT);
				return error;
			}
			/*
			 * Get the ilock in the right order.
			 */
			xfs_dqunlock(uq);
			lockflags = XFS_ILOCK_SHARED;
			xfs_ilock(ip, lockflags);
		} else {
			/*
			 * Take an extra reference, because we'll return
			 * this to caller
			 */
			ASSERT(ip->i_udquot);
			uq = xfs_qm_dqhold(ip->i_udquot);
		}
	}
	if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
		if (ip->i_d.di_gid != gid) {
			xfs_iunlock(ip, lockflags);
			if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
						 XFS_DQ_GROUP,
						 XFS_QMOPT_DQALLOC |
						 XFS_QMOPT_DOWARN,
						 &gq))) {
				if (uq)
					xfs_qm_dqrele(uq);
				ASSERT(error != ENOENT);
				return error;
			}
			xfs_dqunlock(gq);
			lockflags = XFS_ILOCK_SHARED;
			xfs_ilock(ip, lockflags);
		} else {
			ASSERT(ip->i_gdquot);
			gq = xfs_qm_dqhold(ip->i_gdquot);
		}
	} else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
		if (xfs_get_projid(ip) != prid) {
			xfs_iunlock(ip, lockflags);
			if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
						 XFS_DQ_PROJ,
						 XFS_QMOPT_DQALLOC |
						 XFS_QMOPT_DOWARN,
						 &gq))) {
				if (uq)
					xfs_qm_dqrele(uq);
				ASSERT(error != ENOENT);
				return (error);
			}
			xfs_dqunlock(gq);
			lockflags = XFS_ILOCK_SHARED;
			xfs_ilock(ip, lockflags);
		} else {
			ASSERT(ip->i_gdquot);
			gq = xfs_qm_dqhold(ip->i_gdquot);
		}
	}
	if (uq)
		trace_xfs_dquot_dqalloc(ip);

	xfs_iunlock(ip, lockflags);
	if (O_udqpp)
		*O_udqpp = uq;
	else if (uq)
		xfs_qm_dqrele(uq);
	if (O_gdqpp)
		*O_gdqpp = gq;
	else if (gq)
		xfs_qm_dqrele(gq);
	return 0;
}
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 = XFS_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;
}
/*
 * 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;
}
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;

	error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp);
	if (error)
		return error;

	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);

	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;
}
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);
	}

	mutex_lock(&q->qi_quotaofflock);

	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;

	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);
	}

	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) {
		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 {
		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;
}