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_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 55747 : 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 58779929 : return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, 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 :
151 : # else
152 : # define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \
153 : xfs_trans_mod_dquot((tp), (dqp), (field), (delta))
154 : # endif /* CONFIG_XFS_LIVE_HOOKS */
155 :
156 : #else
157 : static inline int
158 : xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
159 : prid_t prid, uint flags, struct xfs_dquot **udqp,
160 : struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
161 : {
162 : *udqp = NULL;
163 : *gdqp = NULL;
164 : *pdqp = NULL;
165 : return 0;
166 : }
167 : #define xfs_trans_dup_dqinfo(tp, tp2)
168 : #define xfs_trans_free_dqinfo(tp)
169 : #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta) do { } while (0)
170 : #define xfs_trans_apply_dquot_deltas(tp)
171 : #define xfs_trans_unreserve_and_mod_dquots(tp)
172 : static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
173 : struct xfs_inode *ip, int64_t dblocks, int64_t rblocks,
174 : bool force)
175 : {
176 : return 0;
177 : }
178 : static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
179 : struct xfs_mount *mp, struct xfs_dquot *udqp,
180 : struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
181 : int64_t nblks, long nions, uint flags)
182 : {
183 : return 0;
184 : }
185 :
186 : static inline int
187 : xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
188 : {
189 : return 0;
190 : }
191 :
192 : static inline int
193 : xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
194 : struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks)
195 : {
196 : return 0;
197 : }
198 :
199 : #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
200 : #define xfs_qm_vop_rename_dqattach(it) (0)
201 : #define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
202 : #define xfs_qm_dqattach(ip) (0)
203 : #define xfs_qm_dqattach_locked(ip, fl) (0)
204 : #define xfs_qm_dqdetach(ip)
205 : #define xfs_qm_dqrele(d) do { (d) = (d); } while(0)
206 : #define xfs_qm_statvfs(ip, s) do { } while(0)
207 : #define xfs_qm_newmount(mp, a, b) (0)
208 : #define xfs_qm_mount_quotas(mp)
209 : #define xfs_qm_unmount(mp)
210 : #define xfs_qm_unmount_quotas(mp)
211 : #define xfs_inode_near_dquot_enforcement(ip, type) (false)
212 :
213 : # ifdef CONFIG_XFS_LIVE_HOOKS
214 : # define xfs_dqtrx_hook_enable() ((void)0)
215 : # define xfs_dqtrx_hook_disable() ((void)0)
216 : # endif /* CONFIG_XFS_LIVE_HOOKS */
217 :
218 : #endif /* CONFIG_XFS_QUOTA */
219 :
220 : static inline int
221 14972661 : xfs_quota_unreserve_blkres(struct xfs_inode *ip, int64_t blocks)
222 : {
223 14972661 : return xfs_quota_reserve_blkres(ip, -blocks);
224 : }
225 :
226 : extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
227 :
228 : #endif /* __XFS_QUOTA_H__ */
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