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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott932f2c32006-06-09 15:29:58 +10002 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
Nathan Scott4ce31212005-11-02 14:59:41 +11003 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott4ce31212005-11-02 14:59:41 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott4ce31212005-11-02 14:59:41 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott4ce31212005-11-02 14:59:41 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
19#include "xfs_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_log.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_trans.h"
22#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110023#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_quota.h"
26#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110029#include "xfs_itable.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_rtalloc.h"
32#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_attr.h"
34#include "xfs_buf_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "xfs_qm.h"
36
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Christoph Hellwigb09cc772007-08-30 17:19:57 +100038STATIC void
39xfs_fill_statvfs_from_dquot(
Christoph Hellwig00dd4022008-11-28 14:23:36 +110040 struct kstatfs *statp,
Christoph Hellwig89605012012-02-20 02:28:17 +000041 struct xfs_dquot *dqp)
Nathan Scott932f2c32006-06-09 15:29:58 +100042{
Nathan Scott932f2c32006-06-09 15:29:58 +100043 __uint64_t limit;
Nathan Scott932f2c32006-06-09 15:29:58 +100044
Christoph Hellwig89605012012-02-20 02:28:17 +000045 limit = dqp->q_core.d_blk_softlimit ?
46 be64_to_cpu(dqp->q_core.d_blk_softlimit) :
47 be64_to_cpu(dqp->q_core.d_blk_hardlimit);
Nathan Scott932f2c32006-06-09 15:29:58 +100048 if (limit && statp->f_blocks > limit) {
49 statp->f_blocks = limit;
Christoph Hellwig9b00f302010-01-21 11:17:20 +000050 statp->f_bfree = statp->f_bavail =
Christoph Hellwig89605012012-02-20 02:28:17 +000051 (statp->f_blocks > dqp->q_res_bcount) ?
52 (statp->f_blocks - dqp->q_res_bcount) : 0;
Nathan Scott932f2c32006-06-09 15:29:58 +100053 }
Christoph Hellwig2a293b72006-07-28 17:04:26 +100054
Christoph Hellwig89605012012-02-20 02:28:17 +000055 limit = dqp->q_core.d_ino_softlimit ?
56 be64_to_cpu(dqp->q_core.d_ino_softlimit) :
57 be64_to_cpu(dqp->q_core.d_ino_hardlimit);
Nathan Scott932f2c32006-06-09 15:29:58 +100058 if (limit && statp->f_files > limit) {
59 statp->f_files = limit;
Christoph Hellwig2a293b72006-07-28 17:04:26 +100060 statp->f_ffree =
Christoph Hellwig89605012012-02-20 02:28:17 +000061 (statp->f_files > dqp->q_res_icount) ?
62 (statp->f_ffree - dqp->q_res_icount) : 0;
Nathan Scott932f2c32006-06-09 15:29:58 +100063 }
Nathan Scott932f2c32006-06-09 15:29:58 +100064}
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Christoph Hellwigb09cc772007-08-30 17:19:57 +100067/*
68 * Directory tree accounting is implemented using project quotas, where
69 * the project identifier is inherited from parent directories.
70 * A statvfs (df, etc.) of a directory that is using project quota should
71 * return a statvfs of the project, not the entire filesystem.
72 * This makes such trees appear as if they are filesystems in themselves.
73 */
Christoph Hellwig7d095252009-06-08 15:33:32 +020074void
Christoph Hellwigb09cc772007-08-30 17:19:57 +100075xfs_qm_statvfs(
76 xfs_inode_t *ip,
Christoph Hellwig00dd4022008-11-28 14:23:36 +110077 struct kstatfs *statp)
Christoph Hellwigb09cc772007-08-30 17:19:57 +100078{
79 xfs_mount_t *mp = ip->i_mount;
80 xfs_dquot_t *dqp;
81
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +000082 if (!xfs_qm_dqget(mp, NULL, xfs_get_projid(ip), XFS_DQ_PROJ, 0, &dqp)) {
Christoph Hellwig89605012012-02-20 02:28:17 +000083 xfs_fill_statvfs_from_dquot(statp, dqp);
Christoph Hellwigb09cc772007-08-30 17:19:57 +100084 xfs_qm_dqput(dqp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070086}
87
Christoph Hellwig7d095252009-06-08 15:33:32 +020088int
Linus Torvalds1da177e2005-04-16 15:20:36 -070089xfs_qm_newmount(
90 xfs_mount_t *mp,
91 uint *needquotamount,
92 uint *quotaflags)
93{
94 uint quotaondisk;
Nathan Scottc8ad20f2005-06-21 15:38:48 +100095 uint uquotaondisk = 0, gquotaondisk = 0, pquotaondisk = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Eric Sandeen62118702008-03-06 13:44:28 +110097 quotaondisk = xfs_sb_version_hasquota(&mp->m_sb) &&
Nathan Scottc8ad20f2005-06-21 15:38:48 +100098 (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100 if (quotaondisk) {
101 uquotaondisk = mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT;
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000102 pquotaondisk = mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 gquotaondisk = mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT;
104 }
105
106 /*
107 * If the device itself is read-only, we can't allow
108 * the user to change the state of quota on the mount -
109 * this would generate a transaction on the ro device,
110 * which would lead to an I/O error and shutdown
111 */
112
113 if (((uquotaondisk && !XFS_IS_UQUOTA_ON(mp)) ||
114 (!uquotaondisk && XFS_IS_UQUOTA_ON(mp)) ||
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000115 (pquotaondisk && !XFS_IS_PQUOTA_ON(mp)) ||
116 (!pquotaondisk && XFS_IS_PQUOTA_ON(mp)) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 (gquotaondisk && !XFS_IS_GQUOTA_ON(mp)) ||
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000118 (!gquotaondisk && XFS_IS_OQUOTA_ON(mp))) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 xfs_dev_is_read_only(mp, "changing quota state")) {
Dave Chinner0b932cc2011-03-07 10:08:35 +1100120 xfs_warn(mp, "please mount with%s%s%s%s.",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 (!quotaondisk ? "out quota" : ""),
122 (uquotaondisk ? " usrquota" : ""),
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000123 (pquotaondisk ? " prjquota" : ""),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 (gquotaondisk ? " grpquota" : ""));
125 return XFS_ERROR(EPERM);
126 }
127
128 if (XFS_IS_QUOTA_ON(mp) || quotaondisk) {
129 /*
130 * Call mount_quotas at this point only if we won't have to do
131 * a quotacheck.
132 */
133 if (quotaondisk && !XFS_QM_NEED_QUOTACHECK(mp)) {
134 /*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300135 * If an error occurred, qm_mount_quotas code
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 * has already disabled quotas. So, just finish
137 * mounting, and get on with the boring life
138 * without disk quotas.
139 */
Christoph Hellwig42490232008-08-13 16:49:32 +1000140 xfs_qm_mount_quotas(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 } else {
142 /*
143 * Clear the quota flags, but remember them. This
144 * is so that the quota code doesn't get invoked
145 * before we're ready. This can happen when an
146 * inode goes inactive and wants to free blocks,
147 * or via xfs_log_mount_finish.
148 */
Thiago Farina667a9292012-11-12 21:32:59 -0200149 *needquotamount = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 *quotaflags = mp->m_qflags;
151 mp->m_qflags = 0;
152 }
153 }
154
155 return 0;
156}