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 /* Hook to feed quota counter updates to an active online repair. */
73 struct xfs_hooks qi_mod_ino_dqtrx_hooks;
74 struct xfs_hooks qi_apply_dqtrx_hooks;
75 };
76
77 static inline struct radix_tree_root *
xfs_dquot_tree(struct xfs_quotainfo * qi,xfs_dqtype_t type)78 xfs_dquot_tree(
79 struct xfs_quotainfo *qi,
80 xfs_dqtype_t type)
81 {
82 switch (type) {
83 case XFS_DQTYPE_USER:
84 return &qi->qi_uquota_tree;
85 case XFS_DQTYPE_GROUP:
86 return &qi->qi_gquota_tree;
87 case XFS_DQTYPE_PROJ:
88 return &qi->qi_pquota_tree;
89 default:
90 ASSERT(0);
91 }
92 return NULL;
93 }
94
95 static inline struct xfs_inode *
xfs_quota_inode(struct xfs_mount * mp,xfs_dqtype_t type)96 xfs_quota_inode(struct xfs_mount *mp, xfs_dqtype_t type)
97 {
98 switch (type) {
99 case XFS_DQTYPE_USER:
100 return mp->m_quotainfo->qi_uquotaip;
101 case XFS_DQTYPE_GROUP:
102 return mp->m_quotainfo->qi_gquotaip;
103 case XFS_DQTYPE_PROJ:
104 return mp->m_quotainfo->qi_pquotaip;
105 default:
106 ASSERT(0);
107 }
108 return NULL;
109 }
110
111 /*
112 * Parameters for tracking dqtrx changes on behalf of an inode. The hook
113 * function arg parameter is the field being updated.
114 */
115 struct xfs_mod_ino_dqtrx_params {
116 uintptr_t tx_id;
117 xfs_ino_t ino;
118 xfs_dqtype_t q_type;
119 xfs_dqid_t q_id;
120 int64_t delta;
121 };
122
123 extern void xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
124 uint field, int64_t delta);
125 extern void xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
126 extern void xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
127
128 /*
129 * We keep the usr, grp, and prj dquots separately so that locking will be
130 * easier to do at commit time. All transactions that we know of at this point
131 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
132 */
133 enum {
134 XFS_QM_TRANS_USR = 0,
135 XFS_QM_TRANS_GRP,
136 XFS_QM_TRANS_PRJ,
137 XFS_QM_TRANS_DQTYPES
138 };
139 #define XFS_QM_TRANS_MAXDQS 5
140 struct xfs_dquot_acct {
141 struct xfs_dqtrx dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
142 };
143
144 /*
145 * Users are allowed to have a usage exceeding their softlimit for
146 * a period this long.
147 */
148 #define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
149 #define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
150 #define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
151
152 extern void xfs_qm_destroy_quotainfo(struct xfs_mount *);
153
154 /* quota ops */
155 extern int xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
156 extern int xfs_qm_scall_getquota(struct xfs_mount *mp,
157 xfs_dqid_t id,
158 xfs_dqtype_t type,
159 struct qc_dqblk *dst);
160 extern int xfs_qm_scall_getquota_next(struct xfs_mount *mp,
161 xfs_dqid_t *id,
162 xfs_dqtype_t type,
163 struct qc_dqblk *dst);
164 extern int xfs_qm_scall_setqlim(struct xfs_mount *mp,
165 xfs_dqid_t id,
166 xfs_dqtype_t type,
167 struct qc_dqblk *newlim);
168 extern int xfs_qm_scall_quotaon(struct xfs_mount *, uint);
169 extern int xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
170
171 static inline struct xfs_def_quota *
xfs_get_defquota(struct xfs_quotainfo * qi,xfs_dqtype_t type)172 xfs_get_defquota(struct xfs_quotainfo *qi, xfs_dqtype_t type)
173 {
174 switch (type) {
175 case XFS_DQTYPE_USER:
176 return &qi->qi_usr_default;
177 case XFS_DQTYPE_GROUP:
178 return &qi->qi_grp_default;
179 case XFS_DQTYPE_PROJ:
180 return &qi->qi_prj_default;
181 default:
182 ASSERT(0);
183 return NULL;
184 }
185 }
186
187 #endif /* __XFS_QM_H__ */
188