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 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 void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *tp,
100 bool already_locked);
101 int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip,
102 int64_t dblocks, int64_t rblocks, bool force);
103 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
104 struct xfs_mount *, struct xfs_dquot *,
105 struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
106 int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp,
107 struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
108 struct xfs_dquot *pdqp, int64_t dblocks);
109
110 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t,
111 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
112 struct xfs_dquot **);
113 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
114 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
115 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
116 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
117 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
118 extern int xfs_qm_dqattach(struct xfs_inode *);
119 extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
120 extern void xfs_qm_dqdetach(struct xfs_inode *);
121 extern void xfs_qm_dqrele(struct xfs_dquot *);
122 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
123 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
124 extern void xfs_qm_mount_quotas(struct xfs_mount *);
125 extern void xfs_qm_unmount(struct xfs_mount *);
126 extern void xfs_qm_unmount_quotas(struct xfs_mount *);
127 bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
128
129 # ifdef CONFIG_XFS_LIVE_HOOKS
130 void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip,
131 struct xfs_dquot *dqp, unsigned int field, int64_t delta);
132
133 struct xfs_quotainfo;
134
135 struct xfs_dqtrx_hook {
136 struct xfs_hook mod_hook;
137 struct xfs_hook apply_hook;
138 };
139
140 void xfs_dqtrx_hook_disable(void);
141 void xfs_dqtrx_hook_enable(void);
142
143 int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
144 void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
145 void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn,
146 notifier_fn_t apply_fn);
147 # else
148 # define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \
149 xfs_trans_mod_dquot((tp), (dqp), (field), (delta))
150 # endif /* CONFIG_XFS_LIVE_HOOKS */
151
152 #else
153 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)154 xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
155 prid_t prid, uint flags, struct xfs_dquot **udqp,
156 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
157 {
158 *udqp = NULL;
159 *gdqp = NULL;
160 *pdqp = NULL;
161 return 0;
162 }
163 #define xfs_trans_dup_dqinfo(tp, tp2)
164 #define xfs_trans_free_dqinfo(tp)
xfs_trans_mod_dquot_byino(struct xfs_trans * tp,struct xfs_inode * ip,uint field,int64_t delta)165 static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp,
166 struct xfs_inode *ip, uint field, int64_t delta)
167 {
168 }
169 #define xfs_trans_apply_dquot_deltas(tp)
170 #define xfs_trans_unreserve_and_mod_dquots(tp, a)
xfs_trans_reserve_quota_nblks(struct xfs_trans * tp,struct xfs_inode * ip,int64_t dblocks,int64_t rblocks,bool force)171 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
172 struct xfs_inode *ip, int64_t dblocks, int64_t rblocks,
173 bool force)
174 {
175 return 0;
176 }
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)177 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
178 struct xfs_mount *mp, struct xfs_dquot *udqp,
179 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
180 int64_t nblks, long nions, uint flags)
181 {
182 return 0;
183 }
184
185 static inline int
xfs_trans_reserve_quota_icreate(struct xfs_trans * tp,struct xfs_dquot * udqp,struct xfs_dquot * gdqp,struct xfs_dquot * pdqp,int64_t dblocks)186 xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
187 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks)
188 {
189 return 0;
190 }
191
192 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
193 #define xfs_qm_vop_rename_dqattach(it) (0)
194 #define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
195 #define xfs_qm_dqattach(ip) (0)
196 #define xfs_qm_dqattach_locked(ip, fl) (0)
197 #define xfs_qm_dqdetach(ip)
198 #define xfs_qm_dqrele(d) do { (d) = (d); } while(0)
199 #define xfs_qm_statvfs(ip, s) do { } while(0)
200 #define xfs_qm_newmount(mp, a, b) (0)
201 #define xfs_qm_mount_quotas(mp)
202 #define xfs_qm_unmount(mp)
203 #define xfs_qm_unmount_quotas(mp)
204 #define xfs_inode_near_dquot_enforcement(ip, type) (false)
205
206 # ifdef CONFIG_XFS_LIVE_HOOKS
207 # define xfs_dqtrx_hook_enable() ((void)0)
208 # define xfs_dqtrx_hook_disable() ((void)0)
209 # endif /* CONFIG_XFS_LIVE_HOOKS */
210
211 #endif /* CONFIG_XFS_QUOTA */
212
213 static inline int
xfs_quota_reserve_blkres(struct xfs_inode * ip,int64_t blocks)214 xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
215 {
216 return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
217 }
218
219 static inline void
xfs_quota_unreserve_blkres(struct xfs_inode * ip,uint64_t blocks)220 xfs_quota_unreserve_blkres(struct xfs_inode *ip, uint64_t blocks)
221 {
222 /* don't return an error as unreserving quotas can't fail */
223 xfs_quota_reserve_blkres(ip, -(int64_t)blocks);
224 }
225
226 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
227
228 #endif /* __XFS_QUOTA_H__ */
229