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 | #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 | int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, |
85 | int64_t dblocks, int64_t rblocks, bool force); |
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 | int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, |
90 | struct xfs_dquot *udqp, struct xfs_dquot *gdqp, |
91 | struct xfs_dquot *pdqp, int64_t dblocks); |
92 | |
93 | extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t, |
94 | prid_t, uint, struct xfs_dquot **, struct xfs_dquot **, |
95 | struct xfs_dquot **); |
96 | extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *, |
97 | struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *); |
98 | extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **); |
99 | extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *, |
100 | struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *); |
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 | static inline int |
112 | xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks) |
113 | { |
114 | return xfs_trans_reserve_quota_nblks(NULL, ip, dblocks: blocks, rblocks: 0, force: false); |
115 | } |
116 | bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type); |
117 | #else |
118 | static inline int |
119 | xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid, |
120 | prid_t prid, uint flags, struct xfs_dquot **udqp, |
121 | struct xfs_dquot **gdqp, struct xfs_dquot **pdqp) |
122 | { |
123 | *udqp = NULL; |
124 | *gdqp = NULL; |
125 | *pdqp = NULL; |
126 | return 0; |
127 | } |
128 | #define xfs_trans_dup_dqinfo(tp, tp2) |
129 | #define xfs_trans_free_dqinfo(tp) |
130 | #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta) do { } while (0) |
131 | #define xfs_trans_apply_dquot_deltas(tp) |
132 | #define xfs_trans_unreserve_and_mod_dquots(tp) |
133 | static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, |
134 | struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, |
135 | bool force) |
136 | { |
137 | return 0; |
138 | } |
139 | static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp, |
140 | struct xfs_mount *mp, struct xfs_dquot *udqp, |
141 | struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, |
142 | int64_t nblks, long nions, uint flags) |
143 | { |
144 | return 0; |
145 | } |
146 | |
147 | static inline int |
148 | xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks) |
149 | { |
150 | return 0; |
151 | } |
152 | |
153 | static inline int |
154 | xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp, |
155 | struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks) |
156 | { |
157 | return 0; |
158 | } |
159 | |
160 | #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p) |
161 | #define xfs_qm_vop_rename_dqattach(it) (0) |
162 | #define xfs_qm_vop_chown(tp, ip, old, new) (NULL) |
163 | #define xfs_qm_dqattach(ip) (0) |
164 | #define xfs_qm_dqattach_locked(ip, fl) (0) |
165 | #define xfs_qm_dqdetach(ip) |
166 | #define xfs_qm_dqrele(d) do { (d) = (d); } while(0) |
167 | #define xfs_qm_statvfs(ip, s) do { } while(0) |
168 | #define xfs_qm_newmount(mp, a, b) (0) |
169 | #define xfs_qm_mount_quotas(mp) |
170 | #define xfs_qm_unmount(mp) |
171 | #define xfs_qm_unmount_quotas(mp) |
172 | #define xfs_inode_near_dquot_enforcement(ip, type) (false) |
173 | #endif /* CONFIG_XFS_QUOTA */ |
174 | |
175 | static inline int |
176 | xfs_quota_unreserve_blkres(struct xfs_inode *ip, int64_t blocks) |
177 | { |
178 | return xfs_quota_reserve_blkres(ip, blocks: -blocks); |
179 | } |
180 | |
181 | extern int xfs_mount_reset_sbqflags(struct xfs_mount *); |
182 | |
183 | #endif /* __XFS_QUOTA_H__ */ |
184 | |