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
12struct xfs_inode;
13
14extern 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
33struct 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 */
40struct 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 */
50struct 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 xfs_inode *qi_dirip; /* quota metadir */
59 struct list_lru qi_lru;
60 uint64_t 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 /* Hook to feed quota counter updates to an active online repair. */
74 struct xfs_hooks qi_mod_ino_dqtrx_hooks;
75 struct xfs_hooks qi_apply_dqtrx_hooks;
76};
77
78static inline struct radix_tree_root *
79xfs_dquot_tree(
80 struct xfs_quotainfo *qi,
81 xfs_dqtype_t type)
82{
83 switch (type) {
84 case XFS_DQTYPE_USER:
85 return &qi->qi_uquota_tree;
86 case XFS_DQTYPE_GROUP:
87 return &qi->qi_gquota_tree;
88 case XFS_DQTYPE_PROJ:
89 return &qi->qi_pquota_tree;
90 default:
91 ASSERT(0);
92 }
93 return NULL;
94}
95
96static inline struct xfs_inode *
97xfs_quota_inode(struct xfs_mount *mp, xfs_dqtype_t type)
98{
99 switch (type) {
100 case XFS_DQTYPE_USER:
101 return mp->m_quotainfo->qi_uquotaip;
102 case XFS_DQTYPE_GROUP:
103 return mp->m_quotainfo->qi_gquotaip;
104 case XFS_DQTYPE_PROJ:
105 return mp->m_quotainfo->qi_pquotaip;
106 default:
107 ASSERT(0);
108 }
109 return NULL;
110}
111
112/*
113 * Parameters for tracking dqtrx changes on behalf of an inode. The hook
114 * function arg parameter is the field being updated.
115 */
116struct xfs_mod_ino_dqtrx_params {
117 uintptr_t tx_id;
118 xfs_ino_t ino;
119 xfs_dqtype_t q_type;
120 xfs_dqid_t q_id;
121 int64_t delta;
122};
123
124extern void xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
125 uint field, int64_t delta);
126extern void xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
127extern void xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
128
129/*
130 * We keep the usr, grp, and prj dquots separately so that locking will be
131 * easier to do at commit time. All transactions that we know of at this point
132 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
133 */
134enum {
135 XFS_QM_TRANS_USR = 0,
136 XFS_QM_TRANS_GRP,
137 XFS_QM_TRANS_PRJ,
138 XFS_QM_TRANS_DQTYPES
139};
140#define XFS_QM_TRANS_MAXDQS 5
141struct xfs_dquot_acct {
142 struct xfs_dqtrx dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
143};
144
145/*
146 * Users are allowed to have a usage exceeding their softlimit for
147 * a period this long.
148 */
149#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
150#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
151#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
152
153extern void xfs_qm_destroy_quotainfo(struct xfs_mount *);
154
155/* quota ops */
156extern int xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
157extern int xfs_qm_scall_getquota(struct xfs_mount *mp,
158 xfs_dqid_t id,
159 xfs_dqtype_t type,
160 struct qc_dqblk *dst);
161extern int xfs_qm_scall_getquota_next(struct xfs_mount *mp,
162 xfs_dqid_t *id,
163 xfs_dqtype_t type,
164 struct qc_dqblk *dst);
165extern int xfs_qm_scall_setqlim(struct xfs_mount *mp,
166 xfs_dqid_t id,
167 xfs_dqtype_t type,
168 struct qc_dqblk *newlim);
169extern int xfs_qm_scall_quotaon(struct xfs_mount *, uint);
170extern int xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
171
172static inline struct xfs_def_quota *
173xfs_get_defquota(struct xfs_quotainfo *qi, xfs_dqtype_t type)
174{
175 switch (type) {
176 case XFS_DQTYPE_USER:
177 return &qi->qi_usr_default;
178 case XFS_DQTYPE_GROUP:
179 return &qi->qi_grp_default;
180 case XFS_DQTYPE_PROJ:
181 return &qi->qi_prj_default;
182 default:
183 ASSERT(0);
184 return NULL;
185 }
186}
187
188int xfs_qm_qino_load(struct xfs_mount *mp, xfs_dqtype_t type,
189 struct xfs_inode **ipp);
190
191#endif /* __XFS_QM_H__ */
192

source code of linux/fs/xfs/xfs_qm.h