Merge branch 'topic/ctl-enhancements' into for-next
[platform/kernel/linux-rpi.git] / fs / xfs / xfs_qm.h
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 *
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 *
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 *
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__ */