summaryrefslogtreecommitdiffstats
path: root/fs/xfs/libxfs/xfs_quota_defs.h
blob: d4af2804b1781bc3256a225e8f3b3dd37124a423 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
/*
 * Copyright (c) 2000-2005 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
 */
#ifndef __XFS_QUOTA_DEFS_H__
#define __XFS_QUOTA_DEFS_H__

/*
 * Quota definitions shared between user and kernel source trees.
 */

/*
 * Even though users may not have quota limits occupying all 64-bits,
 * they may need 64-bit accounting. Hence, 64-bit quota-counters,
 * and quota-limits. This is a waste in the common case, but hey ...
 */
typedef uint64_t	xfs_qcnt_t;
typedef uint16_t	xfs_qwarncnt_t;

/*
 * flags for q_flags field in the dquot.
 */
#define XFS_DQ_USER		0x0001		/* a user quota */
#define XFS_DQ_PROJ		0x0002		/* project quota */
#define XFS_DQ_GROUP		0x0004		/* a group quota */
#define XFS_DQ_DIRTY		0x0008		/* dquot is dirty */
#define XFS_DQ_FREEING		0x0010		/* dquot is being torn down */

#define XFS_DQ_ALLTYPES		(XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)

#define XFS_DQ_FLAGS \
	{ XFS_DQ_USER,		"USER" }, \
	{ XFS_DQ_PROJ,		"PROJ" }, \
	{ XFS_DQ_GROUP,		"GROUP" }, \
	{ XFS_DQ_DIRTY,		"DIRTY" }, \
	{ XFS_DQ_FREEING,	"FREEING" }

/*
 * We have the possibility of all three quota types being active at once, and
 * hence free space modification requires modification of all three current
 * dquots in a single transaction. For this case we need to have a reservation
 * of at least 3 dquots.
 *
 * However, a chmod operation can change both UID and GID in a single
 * transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
 * modified. Hence for this case we need to reserve space for at least 4 dquots.
 *
 * And in the worst case, there's a rename operation that can be modifying up to
 * 4 inodes with dquots attached to them. In reality, the only inodes that can
 * have their dquots modified are the source and destination directory inodes
 * due to directory name creation and removal. That can require space allocation
 * and/or freeing on both directory inodes, and hence all three dquots on each
 * inode can be modified. And if the directories are world writeable, all the
 * dquots can be unique and so 6 dquots can be modified....
 *
 * And, of course, we also need to take into account the dquot log format item
 * used to describe each dquot.
 */
#define XFS_DQUOT_LOGRES(mp)	\
	((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)

#define XFS_IS_QUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
#define XFS_IS_UQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_UQUOTA_ACCT)
#define XFS_IS_PQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_PQUOTA_ACCT)
#define XFS_IS_GQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_GQUOTA_ACCT)
#define XFS_IS_UQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_UQUOTA_ENFD)
#define XFS_IS_GQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_GQUOTA_ENFD)
#define XFS_IS_PQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_PQUOTA_ENFD)

/*
 * Incore only flags for quotaoff - these bits get cleared when quota(s)
 * are in the process of getting turned off. These flags are in m_qflags but
 * never in sb_qflags.
 */
#define XFS_UQUOTA_ACTIVE	0x1000  /* uquotas are being turned off */
#define XFS_GQUOTA_ACTIVE	0x2000  /* gquotas are being turned off */
#define XFS_PQUOTA_ACTIVE	0x4000  /* pquotas are being turned off */
#define XFS_ALL_QUOTA_ACTIVE	\
	(XFS_UQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE)

/*
 * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
 * quota will be not be switched off as long as that inode lock is held.
 */
#define XFS_IS_QUOTA_ON(mp)	((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
						   XFS_GQUOTA_ACTIVE | \
						   XFS_PQUOTA_ACTIVE))
#define XFS_IS_UQUOTA_ON(mp)	((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
#define XFS_IS_GQUOTA_ON(mp)	((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
#define XFS_IS_PQUOTA_ON(mp)	((mp)->m_qflags & XFS_PQUOTA_ACTIVE)

/*
 * Flags to tell various functions what to do. Not all of these are meaningful
 * to a single function. None of these XFS_QMOPT_* flags are meant to have
 * persistent values (ie. their values can and will change between versions)
 */
#define XFS_QMOPT_UQUOTA	0x0000004 /* user dquot requested */
#define XFS_QMOPT_PQUOTA	0x0000008 /* project dquot requested */
#define XFS_QMOPT_FORCE_RES	0x0000010 /* ignore quota limits */
#define XFS_QMOPT_SBVERSION	0x0000040 /* change superblock version num */
#define XFS_QMOPT_GQUOTA	0x0002000 /* group dquot requested */
#define XFS_QMOPT_ENOSPC	0x0004000 /* enospc instead of edquot (prj) */

/*
 * flags to xfs_trans_mod_dquot to indicate which field needs to be
 * modified.
 */
#define XFS_QMOPT_RES_REGBLKS	0x0010000
#define XFS_QMOPT_RES_RTBLKS	0x0020000
#define XFS_QMOPT_BCOUNT	0x0040000
#define XFS_QMOPT_ICOUNT	0x0080000
#define XFS_QMOPT_RTBCOUNT	0x0100000
#define XFS_QMOPT_DELBCOUNT	0x0200000
#define XFS_QMOPT_DELRTBCOUNT	0x0400000
#define XFS_QMOPT_RES_INOS	0x0800000

/*
 * flags for dqalloc.
 */
#define XFS_QMOPT_INHERIT	0x1000000

/*
 * flags to xfs_trans_mod_dquot.
 */
#define XFS_TRANS_DQ_RES_BLKS	XFS_QMOPT_RES_REGBLKS
#define XFS_TRANS_DQ_RES_RTBLKS	XFS_QMOPT_RES_RTBLKS
#define XFS_TRANS_DQ_RES_INOS	XFS_QMOPT_RES_INOS
#define XFS_TRANS_DQ_BCOUNT	XFS_QMOPT_BCOUNT
#define XFS_TRANS_DQ_DELBCOUNT	XFS_QMOPT_DELBCOUNT
#define XFS_TRANS_DQ_ICOUNT	XFS_QMOPT_ICOUNT
#define XFS_TRANS_DQ_RTBCOUNT	XFS_QMOPT_RTBCOUNT
#define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT


#define XFS_QMOPT_QUOTALL	\
		(XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
#define XFS_QMOPT_RESBLK_MASK	(XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)

extern xfs_failaddr_t xfs_dquot_verify(struct xfs_mount *mp,
		struct xfs_disk_dquot *ddq, xfs_dqid_t id, uint type);
extern xfs_failaddr_t xfs_dqblk_verify(struct xfs_mount *mp,
		struct xfs_dqblk *dqb, xfs_dqid_t id, uint type);
extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
extern int xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
		xfs_dqid_t id, uint type);

#endif	/* __XFS_QUOTA_H__ */