summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_qm.h
blob: d5c9fc4ba591e9c7c3a50cf67db879148d71cdde (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
161
162
163
164
165
166
167
168
169
170
171
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_QM_H__
#define __XFS_QM_H__

#include "xfs_dquot_item.h"
#include "xfs_dquot.h"

struct xfs_inode;

extern struct kmem_cache	*xfs_dqtrx_cache;

/*
 * Number of bmaps that we ask from bmapi when doing a quotacheck.
 * We make this restriction to keep the memory usage to a minimum.
 */
#define XFS_DQITER_MAP_SIZE	10

#define XFS_IS_DQUOT_UNINITIALIZED(dqp) ( \
	!dqp->q_blk.hardlimit && \
	!dqp->q_blk.softlimit && \
	!dqp->q_rtb.hardlimit && \
	!dqp->q_rtb.softlimit && \
	!dqp->q_ino.hardlimit && \
	!dqp->q_ino.softlimit && \
	!dqp->q_blk.count && \
	!dqp->q_rtb.count && \
	!dqp->q_ino.count)

struct xfs_quota_limits {
	xfs_qcnt_t		hard;	/* default hard limit */
	xfs_qcnt_t		soft;	/* default soft limit */
	time64_t		time;	/* limit for timers */
};

/* Defaults for each quota type: time limits, warn limits, usage limits */
struct xfs_def_quota {
	struct xfs_quota_limits	blk;
	struct xfs_quota_limits	ino;
	struct xfs_quota_limits	rtb;
};

/*
 * Various quota information for individual filesystems.
 * The mount structure keeps a pointer to this.
 */
struct xfs_quotainfo {
	struct radix_tree_root	qi_uquota_tree;
	struct radix_tree_root	qi_gquota_tree;
	struct radix_tree_root	qi_pquota_tree;
	struct mutex		qi_tree_lock;
	struct xfs_inode	*qi_uquotaip;	/* user quota inode */
	struct xfs_inode	*qi_gquotaip;	/* group quota inode */
	struct xfs_inode	*qi_pquotaip;	/* project quota inode */
	struct list_lru		qi_lru;
	int			qi_dquots;
	struct mutex		qi_quotaofflock;/* to serialize quotaoff */
	xfs_filblks_t		qi_dqchunklen;	/* # BBs in a chunk of dqs */
	uint			qi_dqperchunk;	/* # ondisk dq in above chunk */
	struct xfs_def_quota	qi_usr_default;
	struct xfs_def_quota	qi_grp_default;
	struct xfs_def_quota	qi_prj_default;
	struct shrinker		*qi_shrinker;

	/* Minimum and maximum quota expiration timestamp values. */
	time64_t		qi_expiry_min;
	time64_t		qi_expiry_max;
};

static inline struct radix_tree_root *
xfs_dquot_tree(
	struct xfs_quotainfo	*qi,
	xfs_dqtype_t		type)
{
	switch (type) {
	case XFS_DQTYPE_USER:
		return &qi->qi_uquota_tree;
	case XFS_DQTYPE_GROUP:
		return &qi->qi_gquota_tree;
	case XFS_DQTYPE_PROJ:
		return &qi->qi_pquota_tree;
	default:
		ASSERT(0);
	}
	return NULL;
}

static inline struct xfs_inode *
xfs_quota_inode(struct xfs_mount *mp, xfs_dqtype_t type)
{
	switch (type) {
	case XFS_DQTYPE_USER:
		return mp->m_quotainfo->qi_uquotaip;
	case XFS_DQTYPE_GROUP:
		return mp->m_quotainfo->qi_gquotaip;
	case XFS_DQTYPE_PROJ:
		return mp->m_quotainfo->qi_pquotaip;
	default:
		ASSERT(0);
	}
	return NULL;
}

extern void	xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
				    uint field, int64_t delta);
extern void	xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
extern void	xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);

/*
 * We keep the usr, grp, and prj dquots separately so that locking will be
 * easier to do at commit time. All transactions that we know of at this point
 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
 */
enum {
	XFS_QM_TRANS_USR = 0,
	XFS_QM_TRANS_GRP,
	XFS_QM_TRANS_PRJ,
	XFS_QM_TRANS_DQTYPES
};
#define XFS_QM_TRANS_MAXDQS		2
struct xfs_dquot_acct {
	struct xfs_dqtrx	dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
};

/*
 * Users are allowed to have a usage exceeding their softlimit for
 * a period this long.
 */
#define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
#define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
#define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */

extern void		xfs_qm_destroy_quotainfo(struct xfs_mount *);

/* quota ops */
extern int		xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
extern int		xfs_qm_scall_getquota(struct xfs_mount *mp,
					xfs_dqid_t id,
					xfs_dqtype_t type,
					struct qc_dqblk *dst);
extern int		xfs_qm_scall_getquota_next(struct xfs_mount *mp,
					xfs_dqid_t *id,
					xfs_dqtype_t type,
					struct qc_dqblk *dst);
extern int		xfs_qm_scall_setqlim(struct xfs_mount *mp,
					xfs_dqid_t id,
					xfs_dqtype_t type,
					struct qc_dqblk *newlim);
extern int		xfs_qm_scall_quotaon(struct xfs_mount *, uint);
extern int		xfs_qm_scall_quotaoff(struct xfs_mount *, uint);

static inline struct xfs_def_quota *
xfs_get_defquota(struct xfs_quotainfo *qi, xfs_dqtype_t type)
{
	switch (type) {
	case XFS_DQTYPE_USER:
		return &qi->qi_usr_default;
	case XFS_DQTYPE_GROUP:
		return &qi->qi_grp_default;
	case XFS_DQTYPE_PROJ:
		return &qi->qi_prj_default;
	default:
		ASSERT(0);
		return NULL;
	}
}

#endif /* __XFS_QM_H__ */