1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #ifndef __XFS_QUOTA_H__
7 #define __XFS_QUOTA_H__
8
9 #include "xfs_quota_defs.h"
10
11 /*
12 * Kernel only quota definitions and functions
13 */
14
15 struct xfs_trans;
16 struct xfs_buf;
17
18 /*
19 * This check is done typically without holding the inode lock;
20 * that may seem racy, but it is harmless in the context that it is used.
21 * The inode cannot go inactive as long a reference is kept, and
22 * therefore if dquot(s) were attached, they'll stay consistent.
23 * If, for example, the ownership of the inode changes while
24 * we didn't have the inode locked, the appropriate dquot(s) will be
25 * attached atomically.
26 */
27 #define XFS_NOT_DQATTACHED(mp, ip) \
28 ((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
29 (XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
30 (XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
31
32 #define XFS_QM_NEED_QUOTACHECK(mp) \
33 ((XFS_IS_UQUOTA_ON(mp) && \
34 (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
35 (XFS_IS_GQUOTA_ON(mp) && \
36 (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
37 (XFS_IS_PQUOTA_ON(mp) && \
38 (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
39
40 static inline uint
xfs_quota_chkd_flag(xfs_dqtype_t type)41 xfs_quota_chkd_flag(
42 xfs_dqtype_t type)
43 {
44 switch (type) {
45 case XFS_DQTYPE_USER:
46 return XFS_UQUOTA_CHKD;
47 case XFS_DQTYPE_GROUP:
48 return XFS_GQUOTA_CHKD;
49 case XFS_DQTYPE_PROJ:
50 return XFS_PQUOTA_CHKD;
51 default:
52 return 0;
53 }
54 }
55
56 /*
57 * The structure kept inside the xfs_trans_t keep track of dquot changes
58 * within a transaction and apply them later.
59 */
60 struct xfs_dqtrx {
61 struct xfs_dquot *qt_dquot; /* the dquot this refers to */
62
63 uint64_t qt_blk_res; /* blks reserved on a dquot */
64 int64_t qt_bcount_delta; /* dquot blk count changes */
65 int64_t qt_delbcnt_delta; /* delayed dquot blk count changes */
66
67 uint64_t qt_rtblk_res; /* # blks reserved on a dquot */
68 uint64_t qt_rtblk_res_used;/* # blks used from reservation */
69 int64_t qt_rtbcount_delta;/* dquot realtime blk changes */
70 int64_t qt_delrtb_delta; /* delayed RT blk count changes */
71
72 uint64_t qt_ino_res; /* inode reserved on a dquot */
73 uint64_t qt_ino_res_used; /* inodes used from the reservation */
74 int64_t qt_icount_delta; /* dquot inode count changes */
75 };
76
77 #ifdef CONFIG_XFS_QUOTA
78 extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
79 extern void xfs_trans_free_dqinfo(struct xfs_trans *);
80 extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
81 uint, int64_t);
82 extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
83 extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
84 extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
85 struct xfs_inode *, int64_t, long, uint);
86 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
87 struct xfs_mount *, struct xfs_dquot *,
88 struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
89
90 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t,
91 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
92 struct xfs_dquot **);
93 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
94 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
95 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
96 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
97 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
98 extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
99 struct xfs_dquot *, struct xfs_dquot *,
100 struct xfs_dquot *, uint);
101 extern int xfs_qm_dqattach(struct xfs_inode *);
102 extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
103 extern void xfs_qm_dqdetach(struct xfs_inode *);
104 extern void xfs_qm_dqrele(struct xfs_dquot *);
105 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
106 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
107 extern void xfs_qm_mount_quotas(struct xfs_mount *);
108 extern void xfs_qm_unmount(struct xfs_mount *);
109 extern void xfs_qm_unmount_quotas(struct xfs_mount *);
110
111 #else
112 static inline int
xfs_qm_vop_dqalloc(struct xfs_inode * ip,kuid_t kuid,kgid_t kgid,prid_t prid,uint flags,struct xfs_dquot ** udqp,struct xfs_dquot ** gdqp,struct xfs_dquot ** pdqp)113 xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
114 prid_t prid, uint flags, struct xfs_dquot **udqp,
115 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
116 {
117 *udqp = NULL;
118 *gdqp = NULL;
119 *pdqp = NULL;
120 return 0;
121 }
122 #define xfs_trans_dup_dqinfo(tp, tp2)
123 #define xfs_trans_free_dqinfo(tp)
124 #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
125 #define xfs_trans_apply_dquot_deltas(tp)
126 #define xfs_trans_unreserve_and_mod_dquots(tp)
xfs_trans_reserve_quota_nblks(struct xfs_trans * tp,struct xfs_inode * ip,int64_t nblks,long ninos,uint flags)127 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
128 struct xfs_inode *ip, int64_t nblks, long ninos, uint flags)
129 {
130 return 0;
131 }
xfs_trans_reserve_quota_bydquots(struct xfs_trans * tp,struct xfs_mount * mp,struct xfs_dquot * udqp,struct xfs_dquot * gdqp,struct xfs_dquot * pdqp,int64_t nblks,long nions,uint flags)132 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
133 struct xfs_mount *mp, struct xfs_dquot *udqp,
134 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
135 int64_t nblks, long nions, uint flags)
136 {
137 return 0;
138 }
139 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
140 #define xfs_qm_vop_rename_dqattach(it) (0)
141 #define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
142 #define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl) (0)
143 #define xfs_qm_dqattach(ip) (0)
144 #define xfs_qm_dqattach_locked(ip, fl) (0)
145 #define xfs_qm_dqdetach(ip)
146 #define xfs_qm_dqrele(d)
147 #define xfs_qm_statvfs(ip, s)
148 #define xfs_qm_newmount(mp, a, b) (0)
149 #define xfs_qm_mount_quotas(mp)
150 #define xfs_qm_unmount(mp)
151 #define xfs_qm_unmount_quotas(mp)
152 #endif /* CONFIG_XFS_QUOTA */
153
154 #define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
155 xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
156 #define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
157 xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
158 f | XFS_QMOPT_RES_REGBLKS)
159
160 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
161
162 #endif /* __XFS_QUOTA_H__ */
163