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 | |
127 | static inline int |
128 | xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks) |
129 | { |
130 | return xfs_trans_reserve_quota_nblks(NULL, ip, dblocks: blocks, rblocks: 0, force: false); |
131 | } |
132 | bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type); |
133 | |
134 | # ifdef CONFIG_XFS_LIVE_HOOKS |
135 | void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip, |
136 | struct xfs_dquot *dqp, unsigned int field, int64_t delta); |
137 | |
138 | struct xfs_quotainfo; |
139 | |
140 | struct xfs_dqtrx_hook { |
141 | struct xfs_hook mod_hook; |
142 | struct xfs_hook apply_hook; |
143 | }; |
144 | |
145 | void xfs_dqtrx_hook_disable(void); |
146 | void xfs_dqtrx_hook_enable(void); |
147 | |
148 | int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); |
149 | void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); |
150 | void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn, |
151 | notifier_fn_t apply_fn); |
152 | # else |
153 | # define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \ |
154 | xfs_trans_mod_dquot((tp), (dqp), (field), (delta)) |
155 | # endif /* CONFIG_XFS_LIVE_HOOKS */ |
156 | |
157 | #else |
158 | static inline int |
159 | xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid, |
160 | prid_t prid, uint flags, struct xfs_dquot **udqp, |
161 | struct xfs_dquot **gdqp, struct xfs_dquot **pdqp) |
162 | { |
163 | *udqp = NULL; |
164 | *gdqp = NULL; |
165 | *pdqp = NULL; |
166 | return 0; |
167 | } |
168 | #define xfs_trans_dup_dqinfo(tp, tp2) |
169 | #define xfs_trans_free_dqinfo(tp) |
170 | static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, |
171 | struct xfs_inode *ip, uint field, int64_t delta) |
172 | { |
173 | } |
174 | #define xfs_trans_apply_dquot_deltas(tp) |
175 | #define xfs_trans_unreserve_and_mod_dquots(tp) |
176 | static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, |
177 | struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, |
178 | bool force) |
179 | { |
180 | return 0; |
181 | } |
182 | static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp, |
183 | struct xfs_mount *mp, struct xfs_dquot *udqp, |
184 | struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, |
185 | int64_t nblks, long nions, uint flags) |
186 | { |
187 | return 0; |
188 | } |
189 | |
190 | static inline int |
191 | xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks) |
192 | { |
193 | return 0; |
194 | } |
195 | |
196 | static inline int |
197 | xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp, |
198 | struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks) |
199 | { |
200 | return 0; |
201 | } |
202 | |
203 | #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p) |
204 | #define xfs_qm_vop_rename_dqattach(it) (0) |
205 | #define xfs_qm_vop_chown(tp, ip, old, new) (NULL) |
206 | #define xfs_qm_dqattach(ip) (0) |
207 | #define xfs_qm_dqattach_locked(ip, fl) (0) |
208 | #define xfs_qm_dqdetach(ip) |
209 | #define xfs_qm_dqrele(d) do { (d) = (d); } while(0) |
210 | #define xfs_qm_statvfs(ip, s) do { } while(0) |
211 | #define xfs_qm_newmount(mp, a, b) (0) |
212 | #define xfs_qm_mount_quotas(mp) |
213 | #define xfs_qm_unmount(mp) |
214 | #define xfs_qm_unmount_quotas(mp) |
215 | #define xfs_inode_near_dquot_enforcement(ip, type) (false) |
216 | |
217 | # ifdef CONFIG_XFS_LIVE_HOOKS |
218 | # define xfs_dqtrx_hook_enable() ((void)0) |
219 | # define xfs_dqtrx_hook_disable() ((void)0) |
220 | # endif /* CONFIG_XFS_LIVE_HOOKS */ |
221 | |
222 | #endif /* CONFIG_XFS_QUOTA */ |
223 | |
224 | static inline int |
225 | xfs_quota_unreserve_blkres(struct xfs_inode *ip, int64_t blocks) |
226 | { |
227 | return xfs_quota_reserve_blkres(ip, blocks: -blocks); |
228 | } |
229 | |
230 | extern int xfs_mount_reset_sbqflags(struct xfs_mount *); |
231 | |
232 | #endif /* __XFS_QUOTA_H__ */ |
233 | |