Line data Source code
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_IS_DQDETACHED(mp, ip) \
33 : ((ip)->i_udquot == NULL || \
34 : (ip)->i_gdquot == NULL || \
35 : (ip)->i_pdquot == NULL)
36 :
37 : #define XFS_QM_NEED_QUOTACHECK(mp) \
38 : ((XFS_IS_UQUOTA_ON(mp) && \
39 : (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
40 : (XFS_IS_GQUOTA_ON(mp) && \
41 : (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
42 : (XFS_IS_PQUOTA_ON(mp) && \
43 : (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
44 :
45 : static inline uint
46 : xfs_quota_chkd_flag(
47 : xfs_dqtype_t type)
48 : {
49 103416 : switch (type) {
50 : case XFS_DQTYPE_USER:
51 : return XFS_UQUOTA_CHKD;
52 : case XFS_DQTYPE_GROUP:
53 : return XFS_GQUOTA_CHKD;
54 : case XFS_DQTYPE_PROJ:
55 : return XFS_PQUOTA_CHKD;
56 : default:
57 : return 0;
58 : }
59 : }
60 :
61 : /*
62 : * The structure kept inside the xfs_trans_t keep track of dquot changes
63 : * within a transaction and apply them later.
64 : */
65 : struct xfs_dqtrx {
66 : struct xfs_dquot *qt_dquot; /* the dquot this refers to */
67 :
68 : uint64_t qt_blk_res; /* blks reserved on a dquot */
69 : int64_t qt_bcount_delta; /* dquot blk count changes */
70 : int64_t qt_delbcnt_delta; /* delayed dquot blk count changes */
71 :
72 : uint64_t qt_rtblk_res; /* # blks reserved on a dquot */
73 : uint64_t qt_rtblk_res_used;/* # blks used from reservation */
74 : int64_t qt_rtbcount_delta;/* dquot realtime blk changes */
75 : int64_t qt_delrtb_delta; /* delayed RT blk count changes */
76 :
77 : uint64_t qt_ino_res; /* inode reserved on a dquot */
78 : uint64_t qt_ino_res_used; /* inodes used from the reservation */
79 : int64_t qt_icount_delta; /* dquot inode count changes */
80 : };
81 :
82 : enum xfs_apply_dqtrx_type {
83 : XFS_APPLY_DQTRX_COMMIT = 0,
84 : XFS_APPLY_DQTRX_UNRESERVE,
85 : };
86 :
87 : /*
88 : * Parameters for applying dqtrx changes to a dquot. The hook function arg
89 : * parameter is enum xfs_apply_dqtrx_type.
90 : */
91 : struct xfs_apply_dqtrx_params {
92 : uintptr_t tx_id;
93 : xfs_ino_t ino;
94 : xfs_dqtype_t q_type;
95 : xfs_dqid_t q_id;
96 : };
97 :
98 : #ifdef CONFIG_XFS_QUOTA
99 : extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
100 : extern void xfs_trans_free_dqinfo(struct xfs_trans *);
101 : extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
102 : uint, int64_t);
103 : extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
104 : extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
105 : int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip,
106 : int64_t dblocks, int64_t rblocks, bool force);
107 : extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
108 : struct xfs_mount *, struct xfs_dquot *,
109 : struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
110 : int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp,
111 : struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
112 : struct xfs_dquot *pdqp, int64_t dblocks);
113 :
114 : extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t,
115 : prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
116 : struct xfs_dquot **);
117 : extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
118 : struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
119 : extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
120 : extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
121 : struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
122 : extern int xfs_qm_dqattach(struct xfs_inode *);
123 : extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
124 : extern void xfs_qm_dqdetach(struct xfs_inode *);
125 : extern void xfs_qm_dqrele(struct xfs_dquot *);
126 : extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
127 : extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
128 : int xfs_qm_mount_quotas(struct xfs_mount *mp);
129 : extern void xfs_qm_unmount(struct xfs_mount *);
130 : extern void xfs_qm_unmount_quotas(struct xfs_mount *);
131 :
132 : int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks);
133 : bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
134 :
135 : # ifdef CONFIG_XFS_LIVE_HOOKS
136 : void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip,
137 : struct xfs_dquot *dqp, unsigned int field, int64_t delta);
138 :
139 : struct xfs_quotainfo;
140 :
141 : struct xfs_dqtrx_hook {
142 : struct xfs_hook mod_hook;
143 : struct xfs_hook apply_hook;
144 : };
145 :
146 : void xfs_dqtrx_hook_disable(void);
147 : void xfs_dqtrx_hook_enable(void);
148 :
149 : int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
150 : void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
151 :
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 : #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta) do { } while (0)
171 : #define xfs_trans_apply_dquot_deltas(tp)
172 : #define xfs_trans_unreserve_and_mod_dquots(tp)
173 : static 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 : }
179 : static 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 :
187 : static inline int
188 : xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
189 : {
190 : return 0;
191 : }
192 :
193 : static inline int
194 : xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
195 : struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks)
196 : {
197 : return 0;
198 : }
199 :
200 : #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
201 : #define xfs_qm_vop_rename_dqattach(it) (0)
202 : #define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
203 : #define xfs_qm_dqattach(ip) (0)
204 : #define xfs_qm_dqattach_locked(ip, fl) (0)
205 : #define xfs_qm_dqdetach(ip)
206 : #define xfs_qm_dqrele(d) do { (d) = (d); } while(0)
207 : #define xfs_qm_statvfs(ip, s) do { } while(0)
208 : #define xfs_qm_newmount(mp, a, b) (0)
209 : #define xfs_qm_mount_quotas(mp) (0)
210 : #define xfs_qm_unmount(mp)
211 : #define xfs_qm_unmount_quotas(mp)
212 : #define xfs_inode_near_dquot_enforcement(ip, type) (false)
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 :
221 : static inline int
222 : xfs_quota_unreserve_blkres(struct xfs_inode *ip, int64_t blocks)
223 : {
224 17356859 : return xfs_quota_reserve_blkres(ip, -blocks);
225 : }
226 :
227 : extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
228 :
229 : #endif /* __XFS_QUOTA_H__ */
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