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 typedef uint16_t	xfs_qwarncnt_t;
20 
21 /*
22  * flags for q_flags field in the dquot.
23  */
24 #define XFS_DQ_USER		0x0001		/* a user quota */
25 #define XFS_DQ_PROJ		0x0002		/* project quota */
26 #define XFS_DQ_GROUP		0x0004		/* a group quota */
27 #define XFS_DQ_DIRTY		0x0008		/* dquot is dirty */
28 #define XFS_DQ_FREEING		0x0010		/* dquot is being torn down */
29 
30 #define XFS_DQ_ALLTYPES		(XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
31 
32 #define XFS_DQ_FLAGS \
33 	{ XFS_DQ_USER,		"USER" }, \
34 	{ XFS_DQ_PROJ,		"PROJ" }, \
35 	{ XFS_DQ_GROUP,		"GROUP" }, \
36 	{ XFS_DQ_DIRTY,		"DIRTY" }, \
37 	{ XFS_DQ_FREEING,	"FREEING" }
38 
39 /*
40  * We have the possibility of all three quota types being active at once, and
41  * hence free space modification requires modification of all three current
42  * dquots in a single transaction. For this case we need to have a reservation
43  * of at least 3 dquots.
44  *
45  * However, a chmod operation can change both UID and GID in a single
46  * transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
47  * modified. Hence for this case we need to reserve space for at least 4 dquots.
48  *
49  * And in the worst case, there's a rename operation that can be modifying up to
50  * 4 inodes with dquots attached to them. In reality, the only inodes that can
51  * have their dquots modified are the source and destination directory inodes
52  * due to directory name creation and removal. That can require space allocation
53  * and/or freeing on both directory inodes, and hence all three dquots on each
54  * inode can be modified. And if the directories are world writeable, all the
55  * dquots can be unique and so 6 dquots can be modified....
56  *
57  * And, of course, we also need to take into account the dquot log format item
58  * used to describe each dquot.
59  */
60 #define XFS_DQUOT_LOGRES(mp)	\
61 	((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)
62 
63 #define XFS_IS_QUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
64 #define XFS_IS_UQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_UQUOTA_ACCT)
65 #define XFS_IS_PQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_PQUOTA_ACCT)
66 #define XFS_IS_GQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_GQUOTA_ACCT)
67 #define XFS_IS_UQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_UQUOTA_ENFD)
68 #define XFS_IS_GQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_GQUOTA_ENFD)
69 #define XFS_IS_PQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_PQUOTA_ENFD)
70 
71 /*
72  * Incore only flags for quotaoff - these bits get cleared when quota(s)
73  * are in the process of getting turned off. These flags are in m_qflags but
74  * never in sb_qflags.
75  */
76 #define XFS_UQUOTA_ACTIVE	0x1000  /* uquotas are being turned off */
77 #define XFS_GQUOTA_ACTIVE	0x2000  /* gquotas are being turned off */
78 #define XFS_PQUOTA_ACTIVE	0x4000  /* pquotas are being turned off */
79 #define XFS_ALL_QUOTA_ACTIVE	\
80 	(XFS_UQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE)
81 
82 /*
83  * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
84  * quota will be not be switched off as long as that inode lock is held.
85  */
86 #define XFS_IS_QUOTA_ON(mp)	((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
87 						   XFS_GQUOTA_ACTIVE | \
88 						   XFS_PQUOTA_ACTIVE))
89 #define XFS_IS_UQUOTA_ON(mp)	((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
90 #define XFS_IS_GQUOTA_ON(mp)	((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
91 #define XFS_IS_PQUOTA_ON(mp)	((mp)->m_qflags & XFS_PQUOTA_ACTIVE)
92 
93 /*
94  * Flags to tell various functions what to do. Not all of these are meaningful
95  * to a single function. None of these XFS_QMOPT_* flags are meant to have
96  * persistent values (ie. their values can and will change between versions)
97  */
98 #define XFS_QMOPT_UQUOTA	0x0000004 /* user dquot requested */
99 #define XFS_QMOPT_PQUOTA	0x0000008 /* project dquot requested */
100 #define XFS_QMOPT_FORCE_RES	0x0000010 /* ignore quota limits */
101 #define XFS_QMOPT_SBVERSION	0x0000040 /* change superblock version num */
102 #define XFS_QMOPT_GQUOTA	0x0002000 /* group dquot requested */
103 #define XFS_QMOPT_ENOSPC	0x0004000 /* enospc instead of edquot (prj) */
104 
105 /*
106  * flags to xfs_trans_mod_dquot to indicate which field needs to be
107  * modified.
108  */
109 #define XFS_QMOPT_RES_REGBLKS	0x0010000
110 #define XFS_QMOPT_RES_RTBLKS	0x0020000
111 #define XFS_QMOPT_BCOUNT	0x0040000
112 #define XFS_QMOPT_ICOUNT	0x0080000
113 #define XFS_QMOPT_RTBCOUNT	0x0100000
114 #define XFS_QMOPT_DELBCOUNT	0x0200000
115 #define XFS_QMOPT_DELRTBCOUNT	0x0400000
116 #define XFS_QMOPT_RES_INOS	0x0800000
117 
118 /*
119  * flags for dqalloc.
120  */
121 #define XFS_QMOPT_INHERIT	0x1000000
122 
123 /*
124  * flags to xfs_trans_mod_dquot.
125  */
126 #define XFS_TRANS_DQ_RES_BLKS	XFS_QMOPT_RES_REGBLKS
127 #define XFS_TRANS_DQ_RES_RTBLKS	XFS_QMOPT_RES_RTBLKS
128 #define XFS_TRANS_DQ_RES_INOS	XFS_QMOPT_RES_INOS
129 #define XFS_TRANS_DQ_BCOUNT	XFS_QMOPT_BCOUNT
130 #define XFS_TRANS_DQ_DELBCOUNT	XFS_QMOPT_DELBCOUNT
131 #define XFS_TRANS_DQ_ICOUNT	XFS_QMOPT_ICOUNT
132 #define XFS_TRANS_DQ_RTBCOUNT	XFS_QMOPT_RTBCOUNT
133 #define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
134 
135 
136 #define XFS_QMOPT_QUOTALL	\
137 		(XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
138 #define XFS_QMOPT_RESBLK_MASK	(XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)
139 
140 extern xfs_failaddr_t xfs_dquot_verify(struct xfs_mount *mp,
141 		struct xfs_disk_dquot *ddq, xfs_dqid_t id, uint type);
142 extern xfs_failaddr_t xfs_dqblk_verify(struct xfs_mount *mp,
143 		struct xfs_dqblk *dqb, xfs_dqid_t id, uint type);
144 extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
145 extern int xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
146 		xfs_dqid_t id, uint type);
147 
148 #endif	/* __XFS_QUOTA_H__ */
149