xref: /openbmc/linux/fs/xfs/libxfs/xfs_quota_defs.h (revision 2e06df55)
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_DEFS_H__
7 #define __XFS_QUOTA_DEFS_H__
8 
9 /*
10  * Quota definitions shared between user and kernel source trees.
11  */
12 
13 /*
14  * Even though users may not have quota limits occupying all 64-bits,
15  * they may need 64-bit accounting. Hence, 64-bit quota-counters,
16  * and quota-limits. This is a waste in the common case, but hey ...
17  */
18 typedef uint64_t	xfs_qcnt_t;
19 
20 typedef uint8_t		xfs_dqtype_t;
21 
22 #define XFS_DQTYPE_STRINGS \
23 	{ XFS_DQTYPE_USER,	"USER" }, \
24 	{ XFS_DQTYPE_PROJ,	"PROJ" }, \
25 	{ XFS_DQTYPE_GROUP,	"GROUP" }, \
26 	{ XFS_DQTYPE_BIGTIME,	"BIGTIME" }
27 
28 /*
29  * flags for q_flags field in the dquot.
30  */
31 #define XFS_DQFLAG_DIRTY	(1u << 0)	/* dquot is dirty */
32 #define XFS_DQFLAG_FREEING	(1u << 1)	/* dquot is being torn down */
33 
34 #define XFS_DQFLAG_STRINGS \
35 	{ XFS_DQFLAG_DIRTY,	"DIRTY" }, \
36 	{ XFS_DQFLAG_FREEING,	"FREEING" }
37 
38 /*
39  * We have the possibility of all three quota types being active at once, and
40  * hence free space modification requires modification of all three current
41  * dquots in a single transaction. For this case we need to have a reservation
42  * of at least 3 dquots.
43  *
44  * However, a chmod operation can change both UID and GID in a single
45  * transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
46  * modified. Hence for this case we need to reserve space for at least 4 dquots.
47  *
48  * And in the worst case, there's a rename operation that can be modifying up to
49  * 4 inodes with dquots attached to them. In reality, the only inodes that can
50  * have their dquots modified are the source and destination directory inodes
51  * due to directory name creation and removal. That can require space allocation
52  * and/or freeing on both directory inodes, and hence all three dquots on each
53  * inode can be modified. And if the directories are world writeable, all the
54  * dquots can be unique and so 6 dquots can be modified....
55  *
56  * And, of course, we also need to take into account the dquot log format item
57  * used to describe each dquot.
58  */
59 #define XFS_DQUOT_LOGRES(mp)	\
60 	((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)
61 
62 #define XFS_IS_QUOTA_ON(mp)		((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
63 #define XFS_IS_UQUOTA_ON(mp)		((mp)->m_qflags & XFS_UQUOTA_ACCT)
64 #define XFS_IS_PQUOTA_ON(mp)		((mp)->m_qflags & XFS_PQUOTA_ACCT)
65 #define XFS_IS_GQUOTA_ON(mp)		((mp)->m_qflags & XFS_GQUOTA_ACCT)
66 #define XFS_IS_UQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_UQUOTA_ENFD)
67 #define XFS_IS_GQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_GQUOTA_ENFD)
68 #define XFS_IS_PQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_PQUOTA_ENFD)
69 
70 /*
71  * Flags to tell various functions what to do. Not all of these are meaningful
72  * to a single function. None of these XFS_QMOPT_* flags are meant to have
73  * persistent values (ie. their values can and will change between versions)
74  */
75 #define XFS_QMOPT_UQUOTA	(1u << 0) /* user dquot requested */
76 #define XFS_QMOPT_GQUOTA	(1u << 1) /* group dquot requested */
77 #define XFS_QMOPT_PQUOTA	(1u << 2) /* project dquot requested */
78 #define XFS_QMOPT_FORCE_RES	(1u << 3) /* ignore quota limits */
79 #define XFS_QMOPT_SBVERSION	(1u << 4) /* change superblock version num */
80 
81 /*
82  * flags to xfs_trans_mod_dquot to indicate which field needs to be
83  * modified.
84  */
85 #define XFS_QMOPT_RES_REGBLKS	(1u << 7)
86 #define XFS_QMOPT_RES_RTBLKS	(1u << 8)
87 #define XFS_QMOPT_BCOUNT	(1u << 9)
88 #define XFS_QMOPT_ICOUNT	(1u << 10)
89 #define XFS_QMOPT_RTBCOUNT	(1u << 11)
90 #define XFS_QMOPT_DELBCOUNT	(1u << 12)
91 #define XFS_QMOPT_DELRTBCOUNT	(1u << 13)
92 #define XFS_QMOPT_RES_INOS	(1u << 14)
93 
94 /*
95  * flags for dqalloc.
96  */
97 #define XFS_QMOPT_INHERIT	(1u << 31)
98 
99 #define XFS_QMOPT_FLAGS \
100 	{ XFS_QMOPT_UQUOTA,		"UQUOTA" }, \
101 	{ XFS_QMOPT_PQUOTA,		"PQUOTA" }, \
102 	{ XFS_QMOPT_FORCE_RES,		"FORCE_RES" }, \
103 	{ XFS_QMOPT_SBVERSION,		"SBVERSION" }, \
104 	{ XFS_QMOPT_GQUOTA,		"GQUOTA" }, \
105 	{ XFS_QMOPT_INHERIT,		"INHERIT" }, \
106 	{ XFS_QMOPT_RES_REGBLKS,	"RES_REGBLKS" }, \
107 	{ XFS_QMOPT_RES_RTBLKS,		"RES_RTBLKS" }, \
108 	{ XFS_QMOPT_BCOUNT,		"BCOUNT" }, \
109 	{ XFS_QMOPT_ICOUNT,		"ICOUNT" }, \
110 	{ XFS_QMOPT_RTBCOUNT,		"RTBCOUNT" }, \
111 	{ XFS_QMOPT_DELBCOUNT,		"DELBCOUNT" }, \
112 	{ XFS_QMOPT_DELRTBCOUNT,	"DELRTBCOUNT" }, \
113 	{ XFS_QMOPT_RES_INOS,		"RES_INOS" }
114 
115 /*
116  * flags to xfs_trans_mod_dquot.
117  */
118 #define XFS_TRANS_DQ_RES_BLKS	XFS_QMOPT_RES_REGBLKS
119 #define XFS_TRANS_DQ_RES_RTBLKS	XFS_QMOPT_RES_RTBLKS
120 #define XFS_TRANS_DQ_RES_INOS	XFS_QMOPT_RES_INOS
121 #define XFS_TRANS_DQ_BCOUNT	XFS_QMOPT_BCOUNT
122 #define XFS_TRANS_DQ_DELBCOUNT	XFS_QMOPT_DELBCOUNT
123 #define XFS_TRANS_DQ_ICOUNT	XFS_QMOPT_ICOUNT
124 #define XFS_TRANS_DQ_RTBCOUNT	XFS_QMOPT_RTBCOUNT
125 #define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
126 
127 
128 #define XFS_QMOPT_QUOTALL	\
129 		(XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
130 #define XFS_QMOPT_RESBLK_MASK	(XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)
131 
132 
133 extern xfs_failaddr_t xfs_dquot_verify(struct xfs_mount *mp,
134 		struct xfs_disk_dquot *ddq, xfs_dqid_t id);
135 extern xfs_failaddr_t xfs_dqblk_verify(struct xfs_mount *mp,
136 		struct xfs_dqblk *dqb, xfs_dqid_t id);
137 extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
138 extern void xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
139 		xfs_dqid_t id, xfs_dqtype_t type);
140 
141 struct xfs_dquot;
142 time64_t xfs_dquot_from_disk_ts(struct xfs_disk_dquot *ddq,
143 		__be32 dtimer);
144 __be32 xfs_dquot_to_disk_ts(struct xfs_dquot *ddq, time64_t timer);
145 
146 #endif	/* __XFS_QUOTA_H__ */
147