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_dir2.h"
27#include "xfs_dmapi.h"
28#include "xfs_mount.h"
29#include "xfs_quota.h"
30#include "xfs_error.h"
31
32STATIC struct xfs_dquot *
33xfs_dqvopchown_default(
34	struct xfs_trans	*tp,
35	struct xfs_inode	*ip,
36	struct xfs_dquot	**dqp,
37	struct xfs_dquot	*dq)
38{
39	return NULL;
40}
41
42/*
43 * Clear the quotaflags in memory and in the superblock.
44 */
45int
46xfs_mount_reset_sbqflags(xfs_mount_t *mp)
47{
48	int			error;
49	xfs_trans_t		*tp;
50	unsigned long		s;
51
52	mp->m_qflags = 0;
53	/*
54	 * It is OK to look at sb_qflags here in mount path,
55	 * without SB_LOCK.
56	 */
57	if (mp->m_sb.sb_qflags == 0)
58		return 0;
59	s = XFS_SB_LOCK(mp);
60	mp->m_sb.sb_qflags = 0;
61	XFS_SB_UNLOCK(mp, s);
62
63	/*
64	 * if the fs is readonly, let the incore superblock run
65	 * with quotas off but don't flush the update out to disk
66	 */
67	if (XFS_MTOVFS(mp)->vfs_flag & VFS_RDONLY)
68		return 0;
69#ifdef QUOTADEBUG
70	xfs_fs_cmn_err(CE_NOTE, mp, "Writing superblock quota changes");
71#endif
72	tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
73	if ((error = xfs_trans_reserve(tp, 0, mp->m_sb.sb_sectsize + 128, 0, 0,
74				      XFS_DEFAULT_LOG_COUNT))) {
75		xfs_trans_cancel(tp, 0);
76		xfs_fs_cmn_err(CE_ALERT, mp,
77			"xfs_mount_reset_sbqflags: Superblock update failed!");
78		return error;
79	}
80	xfs_mod_sb(tp, XFS_SB_QFLAGS);
81	error = xfs_trans_commit(tp, 0);
82	return error;
83}
84
85STATIC int
86xfs_noquota_init(
87	xfs_mount_t	*mp,
88	uint		*needquotamount,
89	uint		*quotaflags)
90{
91	int		error = 0;
92
93	*quotaflags = 0;
94	*needquotamount = B_FALSE;
95
96	ASSERT(!XFS_IS_QUOTA_ON(mp));
97
98	/*
99	 * If a file system had quotas running earlier, but decided to
100	 * mount without -o uquota/pquota/gquota options, revoke the
101	 * quotachecked license.
102	 */
103	if (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_ACCT) {
104		cmn_err(CE_NOTE,
105                        "XFS resetting qflags for filesystem %s",
106                        mp->m_fsname);
107
108		error = xfs_mount_reset_sbqflags(mp);
109	}
110	return error;
111}
112
113xfs_qmops_t	xfs_qmcore_stub = {
114	.xfs_qminit		= (xfs_qminit_t) xfs_noquota_init,
115	.xfs_qmdone		= (xfs_qmdone_t) fs_noerr,
116	.xfs_qmmount		= (xfs_qmmount_t) fs_noerr,
117	.xfs_qmunmount		= (xfs_qmunmount_t) fs_noerr,
118	.xfs_dqrele		= (xfs_dqrele_t) fs_noerr,
119	.xfs_dqattach		= (xfs_dqattach_t) fs_noerr,
120	.xfs_dqdetach		= (xfs_dqdetach_t) fs_noerr,
121	.xfs_dqpurgeall		= (xfs_dqpurgeall_t) fs_noerr,
122	.xfs_dqvopalloc		= (xfs_dqvopalloc_t) fs_noerr,
123	.xfs_dqvopcreate	= (xfs_dqvopcreate_t) fs_noerr,
124	.xfs_dqvoprename	= (xfs_dqvoprename_t) fs_noerr,
125	.xfs_dqvopchown		= xfs_dqvopchown_default,
126	.xfs_dqvopchownresv	= (xfs_dqvopchownresv_t) fs_noerr,
127};
128