1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4  * All Rights Reserved.
5  */
6 #ifndef __XFS_QM_H__
7 #define __XFS_QM_H__
8 
9 #include "xfs_dquot_item.h"
10 #include "xfs_dquot.h"
11 
12 struct xfs_inode;
13 
14 extern struct kmem_cache	*xfs_dqtrx_cache;
15 
16 /*
17  * Number of bmaps that we ask from bmapi when doing a quotacheck.
18  * We make this restriction to keep the memory usage to a minimum.
19  */
20 #define XFS_DQITER_MAP_SIZE	10
21 
22 #define XFS_IS_DQUOT_UNINITIALIZED(dqp) ( \
23 	!dqp->q_blk.hardlimit && \
24 	!dqp->q_blk.softlimit && \
25 	!dqp->q_rtb.hardlimit && \
26 	!dqp->q_rtb.softlimit && \
27 	!dqp->q_ino.hardlimit && \
28 	!dqp->q_ino.softlimit && \
29 	!dqp->q_blk.count && \
30 	!dqp->q_rtb.count && \
31 	!dqp->q_ino.count)
32 
33 struct xfs_quota_limits {
34 	xfs_qcnt_t		hard;	/* default hard limit */
35 	xfs_qcnt_t		soft;	/* default soft limit */
36 	time64_t		time;	/* limit for timers */
37 };
38 
39 /* Defaults for each quota type: time limits, warn limits, usage limits */
40 struct xfs_def_quota {
41 	struct xfs_quota_limits	blk;
42 	struct xfs_quota_limits	ino;
43 	struct xfs_quota_limits	rtb;
44 };
45 
46 /*
47  * Various quota information for individual filesystems.
48  * The mount structure keeps a pointer to this.
49  */
50 struct xfs_quotainfo {
51 	struct radix_tree_root	qi_uquota_tree;
52 	struct radix_tree_root	qi_gquota_tree;
53 	struct radix_tree_root	qi_pquota_tree;
54 	struct mutex		qi_tree_lock;
55 	struct xfs_inode	*qi_uquotaip;	/* user quota inode */
56 	struct xfs_inode	*qi_gquotaip;	/* group quota inode */
57 	struct xfs_inode	*qi_pquotaip;	/* project quota inode */
58 	struct list_lru		qi_lru;
59 	int			qi_dquots;
60 	struct mutex		qi_quotaofflock;/* to serialize quotaoff */
61 	xfs_filblks_t		qi_dqchunklen;	/* # BBs in a chunk of dqs */
62 	uint			qi_dqperchunk;	/* # ondisk dq in above chunk */
63 	struct xfs_def_quota	qi_usr_default;
64 	struct xfs_def_quota	qi_grp_default;
65 	struct xfs_def_quota	qi_prj_default;
66 	struct shrinker		qi_shrinker;
67 
68 	/* Minimum and maximum quota expiration timestamp values. */
69 	time64_t		qi_expiry_min;
70 	time64_t		qi_expiry_max;
71 };
72 
73 static inline struct radix_tree_root *
xfs_dquot_tree(struct xfs_quotainfo * qi,xfs_dqtype_t type)74 xfs_dquot_tree(
75 	struct xfs_quotainfo	*qi,
76 	xfs_dqtype_t		type)
77 {
78 	switch (type) {
79 	case XFS_DQTYPE_USER:
80 		return &qi->qi_uquota_tree;
81 	case XFS_DQTYPE_GROUP:
82 		return &qi->qi_gquota_tree;
83 	case XFS_DQTYPE_PROJ:
84 		return &qi->qi_pquota_tree;
85 	default:
86 		ASSERT(0);
87 	}
88 	return NULL;
89 }
90 
91 static inline struct xfs_inode *
xfs_quota_inode(struct xfs_mount * mp,xfs_dqtype_t type)92 xfs_quota_inode(struct xfs_mount *mp, xfs_dqtype_t type)
93 {
94 	switch (type) {
95 	case XFS_DQTYPE_USER:
96 		return mp->m_quotainfo->qi_uquotaip;
97 	case XFS_DQTYPE_GROUP:
98 		return mp->m_quotainfo->qi_gquotaip;
99 	case XFS_DQTYPE_PROJ:
100 		return mp->m_quotainfo->qi_pquotaip;
101 	default:
102 		ASSERT(0);
103 	}
104 	return NULL;
105 }
106 
107 extern void	xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
108 				    uint field, int64_t delta);
109 extern void	xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
110 extern void	xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
111 
112 /*
113  * We keep the usr, grp, and prj dquots separately so that locking will be
114  * easier to do at commit time. All transactions that we know of at this point
115  * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
116  */
117 enum {
118 	XFS_QM_TRANS_USR = 0,
119 	XFS_QM_TRANS_GRP,
120 	XFS_QM_TRANS_PRJ,
121 	XFS_QM_TRANS_DQTYPES
122 };
123 #define XFS_QM_TRANS_MAXDQS		2
124 struct xfs_dquot_acct {
125 	struct xfs_dqtrx	dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
126 };
127 
128 /*
129  * Users are allowed to have a usage exceeding their softlimit for
130  * a period this long.
131  */
132 #define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
133 #define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
134 #define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */
135 
136 extern void		xfs_qm_destroy_quotainfo(struct xfs_mount *);
137 
138 /* quota ops */
139 extern int		xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
140 extern int		xfs_qm_scall_getquota(struct xfs_mount *mp,
141 					xfs_dqid_t id,
142 					xfs_dqtype_t type,
143 					struct qc_dqblk *dst);
144 extern int		xfs_qm_scall_getquota_next(struct xfs_mount *mp,
145 					xfs_dqid_t *id,
146 					xfs_dqtype_t type,
147 					struct qc_dqblk *dst);
148 extern int		xfs_qm_scall_setqlim(struct xfs_mount *mp,
149 					xfs_dqid_t id,
150 					xfs_dqtype_t type,
151 					struct qc_dqblk *newlim);
152 extern int		xfs_qm_scall_quotaon(struct xfs_mount *, uint);
153 extern int		xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
154 
155 static inline struct xfs_def_quota *
xfs_get_defquota(struct xfs_quotainfo * qi,xfs_dqtype_t type)156 xfs_get_defquota(struct xfs_quotainfo *qi, xfs_dqtype_t type)
157 {
158 	switch (type) {
159 	case XFS_DQTYPE_USER:
160 		return &qi->qi_usr_default;
161 	case XFS_DQTYPE_GROUP:
162 		return &qi->qi_grp_default;
163 	case XFS_DQTYPE_PROJ:
164 		return &qi->qi_prj_default;
165 	default:
166 		ASSERT(0);
167 		return NULL;
168 	}
169 }
170 
171 #endif /* __XFS_QM_H__ */
172