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
15struct xfs_trans;
16struct 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
40static inline uint
41xfs_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 */
60struct 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
77enum 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 */
86struct 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
94extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
95extern void xfs_trans_free_dqinfo(struct xfs_trans *);
96extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
97 uint, int64_t);
98extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
99void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *tp,
100 bool already_locked);
101int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip,
102 int64_t dblocks, int64_t rblocks, bool force);
103extern 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);
106int 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
110extern 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 **);
113extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
114 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
115extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
116extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
117 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
118extern int xfs_qm_dqattach(struct xfs_inode *);
119extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
120extern void xfs_qm_dqdetach(struct xfs_inode *);
121extern void xfs_qm_dqrele(struct xfs_dquot *);
122extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
123extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
124void xfs_qm_resume_quotaon(struct xfs_mount *mp);
125extern void xfs_qm_mount_quotas(struct xfs_mount *);
126extern void xfs_qm_unmount(struct xfs_mount *);
127extern void xfs_qm_unmount_quotas(struct xfs_mount *);
128bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
129int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks);
130
131# ifdef CONFIG_XFS_LIVE_HOOKS
132void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip,
133 struct xfs_dquot *dqp, unsigned int field, int64_t delta);
134
135struct xfs_quotainfo;
136
137struct xfs_dqtrx_hook {
138 struct xfs_hook mod_hook;
139 struct xfs_hook apply_hook;
140};
141
142void xfs_dqtrx_hook_disable(void);
143void xfs_dqtrx_hook_enable(void);
144
145int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
146void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
147void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn,
148 notifier_fn_t apply_fn);
149# else
150# define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \
151 xfs_trans_mod_dquot((tp), (dqp), (field), (delta))
152# endif /* CONFIG_XFS_LIVE_HOOKS */
153
154#else
155static inline int
156xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
157 prid_t prid, uint flags, struct xfs_dquot **udqp,
158 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
159{
160 *udqp = NULL;
161 *gdqp = NULL;
162 *pdqp = NULL;
163 return 0;
164}
165#define xfs_trans_dup_dqinfo(tp, tp2)
166#define xfs_trans_free_dqinfo(tp)
167static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp,
168 struct xfs_inode *ip, uint field, int64_t delta)
169{
170}
171#define xfs_trans_apply_dquot_deltas(tp)
172#define xfs_trans_unreserve_and_mod_dquots(tp, a)
173static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
174 struct xfs_inode *ip, int64_t dblocks, int64_t rblocks,
175 bool force)
176{
177 return 0;
178}
179static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
180 struct xfs_mount *mp, struct xfs_dquot *udqp,
181 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
182 int64_t nblks, long nions, uint flags)
183{
184 return 0;
185}
186
187static inline int
188xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
189 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks)
190{
191 return 0;
192}
193
194#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
195#define xfs_qm_vop_rename_dqattach(it) (0)
196#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
197#define xfs_qm_dqattach(ip) (0)
198#define xfs_qm_dqattach_locked(ip, fl) (0)
199#define xfs_qm_dqdetach(ip)
200#define xfs_qm_dqrele(d) do { (d) = (d); } while(0)
201#define xfs_qm_statvfs(ip, s) do { } while(0)
202#define xfs_qm_newmount(mp, a, b) (0)
203#define xfs_qm_resume_quotaon(mp) ((void)0)
204#define xfs_qm_mount_quotas(mp)
205#define xfs_qm_unmount(mp)
206#define xfs_qm_unmount_quotas(mp)
207#define xfs_inode_near_dquot_enforcement(ip, type) (false)
208
209static inline int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
210{
211 return 0;
212}
213
214# ifdef CONFIG_XFS_LIVE_HOOKS
215# define xfs_dqtrx_hook_enable() ((void)0)
216# define xfs_dqtrx_hook_disable() ((void)0)
217# endif /* CONFIG_XFS_LIVE_HOOKS */
218
219#endif /* CONFIG_XFS_QUOTA */
220
221static inline void
222xfs_quota_unreserve_blkres(struct xfs_inode *ip, uint64_t blocks)
223{
224 /* don't return an error as unreserving quotas can't fail */
225 xfs_quota_reserve_blkres(ip, blocks: -(int64_t)blocks);
226}
227
228extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
229
230#endif /* __XFS_QUOTA_H__ */
231

source code of linux/fs/xfs/xfs_quota.h