Release 4.11 fs/xfs/xfs_qm_bhv.c

/*
 * Copyright (c) 2000-2006 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 "xfs.h"
#include "xfs_fs.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_quota.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_error.h"
#include "xfs_trans.h"
#include "xfs_qm.h"



STATIC void

xfs_fill_statvfs_from_dquot(
	struct kstatfs		*statp,
	struct xfs_dquot	*dqp)
{
	__uint64_t		limit;

	limit = dqp->q_core.d_blk_softlimit ?
		be64_to_cpu(dqp->q_core.d_blk_softlimit) :
		be64_to_cpu(dqp->q_core.d_blk_hardlimit);
	if (limit && statp->f_blocks > limit) {
		statp->f_blocks = limit;
		statp->f_bfree = statp->f_bavail =
			(statp->f_blocks > dqp->q_res_bcount) ?
			 (statp->f_blocks - dqp->q_res_bcount) : 0;
	}

	limit = dqp->q_core.d_ino_softlimit ?
		be64_to_cpu(dqp->q_core.d_ino_softlimit) :
		be64_to_cpu(dqp->q_core.d_ino_hardlimit);
	if (limit && statp->f_files > limit) {
		statp->f_files = limit;
		statp->f_ffree =
			(statp->f_files > dqp->q_res_icount) ?
			 (statp->f_ffree - dqp->q_res_icount) : 0;
	}
}


Contributors
Person
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Commits
CommitProp
Nathan Scott
103
63.19%
1
16.67%
Christoph Hellwig
60
36.81%
5
83.33%
Total
163
100.00%
6
100.00%

/*
 * 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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
59
95.16%
4
80.00%
Arkadiusz Miskiewicz
3
4.84%
1
20.00%
Total
62
100.00%
5
100.00%


int

xfs_qm_newmount(
	xfs_mount_t	*mp,
	uint		*needquotamount,
	uint		*quotaflags)
{
	uint		quotaondisk;
	uint		uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;

	quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
				(mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);

	if (quotaondisk) {
		uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
		pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
		gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
	}

	/*
         * If the device itself is read-only, we can't allow
         * the user to change the state of quota on the mount -
         * this would generate a transaction on the ro device,
         * which would lead to an I/O error and shutdown
         */

	if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
	    (!uquotaondisk &&  XFS_IS_UQUOTA_ON(mp)) ||
	     (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
	    (!gquotaondisk &&  XFS_IS_GQUOTA_ON(mp)) ||
	     (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
	    (!pquotaondisk &&  XFS_IS_PQUOTA_ON(mp)))  &&
	    xfs_dev_is_read_only(mp, "changing quota state")) {
		xfs_warn(mp, "please mount with%s%s%s%s.",
			(!quotaondisk ? "out quota" : ""),
			(uquotaondisk ? " usrquota" : ""),
			(gquotaondisk ? " grpquota" : ""),
			(pquotaondisk ? " prjquota" : ""));
		return -EPERM;
	}

	if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
		/*
                 * Call mount_quotas at this point only if we won't have to do
                 * a quotacheck.
                 */
		if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
			/*
                         * If an error occurred, qm_mount_quotas code
                         * has already disabled quotas. So, just finish
                         * mounting, and get on with the boring life
                         * without disk quotas.
                         */
			xfs_qm_mount_quotas(mp);
		} else {
			/*
                         * Clear the quota flags, but remember them. This
                         * is so that the quota code doesn't get invoked
                         * before we're ready. This can happen when an
                         * inode goes inactive and wants to free blocks,
                         * or via xfs_log_mount_finish.
                         */
			*needquotamount = true;
			*quotaflags = mp->m_qflags;
			mp->m_qflags = 0;
		}
	}

	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
205
78.24%
1
12.50%
Nathan Scott
38
14.50%
1
12.50%
Chandra Seetharaman
12
4.58%
1
12.50%
Dave Chinner
4
1.53%
2
25.00%
Thiago Farina
1
0.38%
1
12.50%
Eric Sandeen
1
0.38%
1
12.50%
Lucas De Marchi
1
0.38%
1
12.50%
Total
262
100.00%
8
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Christoph Hellwig
330
63.22%
7
35.00%
Nathan Scott
143
27.39%
3
15.00%
Russell Cattelan
19
3.64%
1
5.00%
Dave Chinner
12
2.30%
4
20.00%
Chandra Seetharaman
12
2.30%
1
5.00%
Arkadiusz Miskiewicz
3
0.57%
1
5.00%
Eric Sandeen
1
0.19%
1
5.00%
Thiago Farina
1
0.19%
1
5.00%
Lucas De Marchi
1
0.19%
1
5.00%
Total
522
100.00%
20
100.00%
Directory: fs/xfs

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