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
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 enum xfs_apply_dqtrx_type {
78 XFS_APPLY_DQTRX_COMMIT = 0,
79 XFS_APPLY_DQTRX_UNRESERVE,
80 };
81
82 /*
83 * Parameters for applying dqtrx changes to a dquot. The hook function arg
84 * parameter is enum xfs_apply_dqtrx_type.
85 */
86 struct xfs_apply_dqtrx_params {
87 uintptr_t tx_id;
88 xfs_ino_t ino;
89 xfs_dqtype_t q_type;
90 xfs_dqid_t q_id;
91 };
92
93 #ifdef CONFIG_XFS_QUOTA
94 extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
95 extern void xfs_trans_free_dqinfo(struct xfs_trans *);
96 extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
97 uint, int64_t);
98 extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
99 extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
100 int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip,
101 int64_t dblocks, int64_t rblocks, bool force);
102 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
103 struct xfs_mount *, struct xfs_dquot *,
104 struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
105 int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp,
106 struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
107 struct xfs_dquot *pdqp, int64_t dblocks);
108
109 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t,
110 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
111 struct xfs_dquot **);
112 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
113 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
114 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
115 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
116 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
117 extern int xfs_qm_dqattach(struct xfs_inode *);
118 extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
119 extern void xfs_qm_dqdetach(struct xfs_inode *);
120 extern void xfs_qm_dqrele(struct xfs_dquot *);
121 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
122 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
123 extern void xfs_qm_mount_quotas(struct xfs_mount *);
124 extern void xfs_qm_unmount(struct xfs_mount *);
125 extern void xfs_qm_unmount_quotas(struct xfs_mount *);
126 bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
127
128 # ifdef CONFIG_XFS_LIVE_HOOKS
129 void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip,
130 struct xfs_dquot *dqp, unsigned int field, int64_t delta);
131
132 struct xfs_quotainfo;
133
134 struct xfs_dqtrx_hook {
135 struct xfs_hook mod_hook;
136 struct xfs_hook apply_hook;
137 };
138
139 void xfs_dqtrx_hook_disable(void);
140 void xfs_dqtrx_hook_enable(void);
141
142 int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
143 void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
144 void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn,
145 notifier_fn_t apply_fn);
146 # else
147 # define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \
148 xfs_trans_mod_dquot((tp), (dqp), (field), (delta))
149 # endif /* CONFIG_XFS_LIVE_HOOKS */
150
151 #else
152 static inline int
153 xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
154 prid_t prid, uint flags, struct xfs_dquot **udqp,
155 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
156 {
157 *udqp = NULL;
158 *gdqp = NULL;
159 *pdqp = NULL;
160 return 0;
161 }
162 #define xfs_trans_dup_dqinfo(tp, tp2)
163 #define xfs_trans_free_dqinfo(tp)
164 static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp,
165 struct xfs_inode *ip, uint field, int64_t delta)
166 {
167 }
168 #define xfs_trans_apply_dquot_deltas(tp)
169 #define xfs_trans_unreserve_and_mod_dquots(tp)
170 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
171 struct xfs_inode *ip, int64_t dblocks, int64_t rblocks,
172 bool force)
173 {
174 return 0;
175 }
176 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
177 struct xfs_mount *mp, struct xfs_dquot *udqp,
178 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
179 int64_t nblks, long nions, uint flags)
180 {
181 return 0;
182 }
183
184 static inline int
185 xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
186 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks)
187 {
188 return 0;
189 }
190
191 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
192 #define xfs_qm_vop_rename_dqattach(it) (0)
193 #define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
194 #define xfs_qm_dqattach(ip) (0)
195 #define xfs_qm_dqattach_locked(ip, fl) (0)
196 #define xfs_qm_dqdetach(ip)
197 #define xfs_qm_dqrele(d) do { (d) = (d); } while(0)
198 #define xfs_qm_statvfs(ip, s) do { } while(0)
199 #define xfs_qm_newmount(mp, a, b) (0)
200 #define xfs_qm_mount_quotas(mp)
201 #define xfs_qm_unmount(mp)
202 #define xfs_qm_unmount_quotas(mp)
203 #define xfs_inode_near_dquot_enforcement(ip, type) (false)
204
205 # ifdef CONFIG_XFS_LIVE_HOOKS
206 # define xfs_dqtrx_hook_enable() ((void)0)
207 # define xfs_dqtrx_hook_disable() ((void)0)
208 # endif /* CONFIG_XFS_LIVE_HOOKS */
209
210 #endif /* CONFIG_XFS_QUOTA */
211
212 static inline int
213 xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
214 {
215 return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
216 }
217
218 static inline void
219 xfs_quota_unreserve_blkres(struct xfs_inode *ip, uint64_t blocks)
220 {
221 /* don't return an error as unreserving quotas can't fail */
222 xfs_quota_reserve_blkres(ip, -(int64_t)blocks);
223 }
224
225 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
226
227 #endif /* __XFS_QUOTA_H__ */
228
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