1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * 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.
13 *
14 * 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
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_types.h"
21#include "xfs_log.h"
22#include "xfs_inum.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_dir.h"
27#include "xfs_dir2.h"
28#include "xfs_dmapi.h"
29#include "xfs_mount.h"
30#include "xfs_quota.h"
31#include "xfs_error.h"
32
33STATIC struct xfs_dquot *
34xfs_dqvopchown_default(
35	struct xfs_trans	*tp,
36	struct xfs_inode	*ip,
37	struct xfs_dquot	**dqp,
38	struct xfs_dquot	*dq)
39{
40	return NULL;
41}
42
43/*
44 * Clear the quotaflags in memory and in the superblock.
45 */
46int
47xfs_mount_reset_sbqflags(xfs_mount_t *mp)
48{
49	int			error;
50	xfs_trans_t		*tp;
51	unsigned long		s;
52
53	mp->m_qflags = 0;
54	/*
55	 * It is OK to look at sb_qflags here in mount path,
56	 * without SB_LOCK.
57	 */
58	if (mp->m_sb.sb_qflags == 0)
59		return 0;
60	s = XFS_SB_LOCK(mp);
61	mp->m_sb.sb_qflags = 0;
62	XFS_SB_UNLOCK(mp, s);
63
64	/*
65	 * if the fs is readonly, let the incore superblock run
66	 * with quotas off but don't flush the update out to disk
67	 */
68	if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
69		return 0;
70#ifdef QUOTADEBUG
71	xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
72#endif
73	tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
74	if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
75				      XFS_DEFAULT_LOG_COUNT))) {
76		xfs_trans_cancel(tp, 0);
77		xfs_fs_cmn_err(CE_ALERT, mp,
78			"xfs_mount_reset_sbqflags: Superblock update failed!");
79		return error;
80	}
81	xfs_mod_sb(tp, XFS_SB_QFLAGS);
82	error = xfs_trans_commit(tp, 0, NULL);
83	return error;
84}
85
86STATIC int
87xfs_noquota_init(
88	xfs_mount_t	*mp,
89	uint		*needquotamount,
90	uint		*quotaflags)
91{
92	int		error = 0;
93
94	*quotaflags = 0;
95	*needquotamount = B_FALSE;
96
97	ASSERT(!XFS_IS_QUOTA_ON(mp));
98
99	/*
100	 * If a file system had quotas running earlier, but decided to
101	 * mount without -o uquota/pquota/gquota options, revoke the
102	 * quotachecked license.
103	 */
104	if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
105		cmn_err(CE_NOTE,
106                        "XFS resetting qflags for filesystem %s",
107                        mp->m_fsname);
108
109		error = xfs_mount_reset_sbqflags(mp);
110	}
111	return error;
112}
113
114xfs_qmops_t	xfs_qmcore_stub = {
115	.xfs_qminit		= (xfs_qminit_t) xfs_noquota_init,
116	.xfs_qmdone		= (xfs_qmdone_t) fs_noerr,
117	.xfs_qmmount		= (xfs_qmmount_t) fs_noerr,
118	.xfs_qmunmount		= (xfs_qmunmount_t) fs_noerr,
119	.xfs_dqrele		= (xfs_dqrele_t) fs_noerr,
120	.xfs_dqattach		= (xfs_dqattach_t) fs_noerr,
121	.xfs_dqdetach		= (xfs_dqdetach_t) fs_noerr,
122	.xfs_dqpurgeall		= (xfs_dqpurgeall_t) fs_noerr,
123	.xfs_dqvopalloc		= (xfs_dqvopalloc_t) fs_noerr,
124	.xfs_dqvopcreate	= (xfs_dqvopcreate_t) fs_noerr,
125	.xfs_dqvoprename	= (xfs_dqvoprename_t) fs_noerr,
126	.xfs_dqvopchown		= xfs_dqvopchown_default,
127	.xfs_dqvopchownresv	= (xfs_dqvopchownresv_t) fs_noerr,
128};
129