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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_zone	*xfs_qm_dqtrxzone;
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 	xfs_qwarncnt_t		warn;	/* limit for warnings */
38 };
39 
40 /* Defaults for each quota type: time limits, warn limits, usage limits */
41 struct xfs_def_quota {
42 	struct xfs_quota_limits	blk;
43 	struct xfs_quota_limits	ino;
44 	struct xfs_quota_limits	rtb;
45 };
46 
47 /*
48  * Various quota information for individual filesystems.
49  * The mount structure keeps a pointer to this.
50  */
51 struct xfs_quotainfo {
52 	struct radix_tree_root	qi_uquota_tree;
53 	struct radix_tree_root	qi_gquota_tree;
54 	struct radix_tree_root	qi_pquota_tree;
55 	struct mutex		qi_tree_lock;
56 	struct xfs_inode	*qi_uquotaip;	/* user quota inode */
57 	struct xfs_inode	*qi_gquotaip;	/* group quota inode */
58 	struct xfs_inode	*qi_pquotaip;	/* project quota inode */
59 	struct list_lru		qi_lru;
60 	int			qi_dquots;
61 	struct mutex		qi_quotaofflock;/* to serialize quotaoff */
62 	xfs_filblks_t		qi_dqchunklen;	/* # BBs in a chunk of dqs */
63 	uint			qi_dqperchunk;	/* # ondisk dq in above chunk */
64 	struct xfs_def_quota	qi_usr_default;
65 	struct xfs_def_quota	qi_grp_default;
66 	struct xfs_def_quota	qi_prj_default;
67 	struct shrinker		qi_shrinker;
68 
69 	/* Minimum and maximum quota expiration timestamp values. */
70 	time64_t		qi_expiry_min;
71 	time64_t		qi_expiry_max;
72 };
73 
74 static inline struct radix_tree_root *
xfs_dquot_tree(struct xfs_quotainfo * qi,xfs_dqtype_t type)75 xfs_dquot_tree(
76 	struct xfs_quotainfo	*qi,
77 	xfs_dqtype_t		type)
78 {
79 	switch (type) {
80 	case XFS_DQTYPE_USER:
81 		return &qi->qi_uquota_tree;
82 	case XFS_DQTYPE_GROUP:
83 		return &qi->qi_gquota_tree;
84 	case XFS_DQTYPE_PROJ:
85 		return &qi->qi_pquota_tree;
86 	default:
87 		ASSERT(0);
88 	}
89 	return NULL;
90 }
91 
92 static inline struct xfs_inode *
xfs_quota_inode(struct xfs_mount * mp,xfs_dqtype_t type)93 xfs_quota_inode(struct xfs_mount *mp, xfs_dqtype_t type)
94 {
95 	switch (type) {
96 	case XFS_DQTYPE_USER:
97 		return mp->m_quotainfo->qi_uquotaip;
98 	case XFS_DQTYPE_GROUP:
99 		return mp->m_quotainfo->qi_gquotaip;
100 	case XFS_DQTYPE_PROJ:
101 		return mp->m_quotainfo->qi_pquotaip;
102 	default:
103 		ASSERT(0);
104 	}
105 	return NULL;
106 }
107 
108 extern void	xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
109 				    uint field, int64_t delta);
110 extern void	xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
111 extern void	xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
112 
113 /*
114  * We keep the usr, grp, and prj dquots separately so that locking will be
115  * easier to do at commit time. All transactions that we know of at this point
116  * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
117  */
118 enum {
119 	XFS_QM_TRANS_USR = 0,
120 	XFS_QM_TRANS_GRP,
121 	XFS_QM_TRANS_PRJ,
122 	XFS_QM_TRANS_DQTYPES
123 };
124 #define XFS_QM_TRANS_MAXDQS		2
125 struct xfs_dquot_acct {
126 	struct xfs_dqtrx	dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
127 };
128 
129 /*
130  * Users are allowed to have a usage exceeding their softlimit for
131  * a period this long.
132  */
133 #define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
134 #define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
135 #define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */
136 
137 #define XFS_QM_BWARNLIMIT	5
138 #define XFS_QM_IWARNLIMIT	5
139 #define XFS_QM_RTBWARNLIMIT	5
140 
141 extern void		xfs_qm_destroy_quotainfo(struct xfs_mount *);
142 
143 /* dquot stuff */
144 extern void		xfs_qm_dqpurge_all(struct xfs_mount *, uint);
145 extern void		xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
146 
147 /* quota ops */
148 extern int		xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
149 extern int		xfs_qm_scall_getquota(struct xfs_mount *mp,
150 					xfs_dqid_t id,
151 					xfs_dqtype_t type,
152 					struct qc_dqblk *dst);
153 extern int		xfs_qm_scall_getquota_next(struct xfs_mount *mp,
154 					xfs_dqid_t *id,
155 					xfs_dqtype_t type,
156 					struct qc_dqblk *dst);
157 extern int		xfs_qm_scall_setqlim(struct xfs_mount *mp,
158 					xfs_dqid_t id,
159 					xfs_dqtype_t type,
160 					struct qc_dqblk *newlim);
161 extern int		xfs_qm_scall_quotaon(struct xfs_mount *, uint);
162 extern int		xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
163 
164 static inline struct xfs_def_quota *
xfs_get_defquota(struct xfs_quotainfo * qi,xfs_dqtype_t type)165 xfs_get_defquota(struct xfs_quotainfo *qi, xfs_dqtype_t type)
166 {
167 	switch (type) {
168 	case XFS_DQTYPE_USER:
169 		return &qi->qi_usr_default;
170 	case XFS_DQTYPE_GROUP:
171 		return &qi->qi_grp_default;
172 	case XFS_DQTYPE_PROJ:
173 		return &qi->qi_prj_default;
174 	default:
175 		ASSERT(0);
176 		return NULL;
177 	}
178 }
179 
180 #endif /* __XFS_QM_H__ */
181