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 #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
xfs_quota_reserve_blkres(struct xfs_inode * ip,int64_t blocks)112 xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
113 {
114 	return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
115 }
116 bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
117 #else
118 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)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)
xfs_trans_reserve_quota_nblks(struct xfs_trans * tp,struct xfs_inode * ip,int64_t dblocks,int64_t rblocks,bool force)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 }
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)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
xfs_quota_reserve_blkres(struct xfs_inode * ip,int64_t blocks)148 xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
149 {
150 	return 0;
151 }
152 
153 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)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
xfs_quota_unreserve_blkres(struct xfs_inode * ip,int64_t blocks)176 xfs_quota_unreserve_blkres(struct xfs_inode *ip, int64_t blocks)
177 {
178 	return xfs_quota_reserve_blkres(ip, -blocks);
179 }
180 
181 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
182 
183 #endif	/* __XFS_QUOTA_H__ */
184