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1 | /* |
2 | * Copyright (c) 1982, 1986 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Robert Elz at The University of Melbourne. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | * | |
36 | * @(#)quota.h 7.9 (Berkeley) 2/22/91 | |
37 | */ | |
38 | ||
39 | #ifndef _QUOTA_ | |
40 | #define _QUOTA_ | |
41 | ||
42 | /* | |
43 | * Definitions for disk quotas imposed on the average user | |
44 | * (big brother finally hits UNIX). | |
45 | * | |
46 | * The following constants define the amount of time given a user | |
47 | * before the soft limits are treated as hard limits (usually resulting | |
48 | * in an allocation failure). The timer is started when the user crosses | |
49 | * their soft limit, it is reset when they go below their soft limit. | |
50 | */ | |
51 | #define MAX_IQ_TIME (7*24*60*60) /* 1 week */ | |
52 | #define MAX_DQ_TIME (7*24*60*60) /* 1 week */ | |
53 | ||
54 | /* | |
55 | * The following constants define the usage of the quota file array | |
56 | * in the ufsmount structure and dquot array in the inode structure. | |
57 | * The semantics of the elements of these arrays are defined in the | |
58 | * routine getinoquota; the remainder of the quota code treats them | |
59 | * generically and need not be inspected when changing the size of | |
60 | * the array. | |
61 | */ | |
62 | #define MAXQUOTAS 2 | |
63 | #define USRQUOTA 0 /* element used for user quotas */ | |
64 | #define GRPQUOTA 1 /* element used for group quotas */ | |
65 | ||
66 | /* | |
67 | * Definitions for the default names of the quotas files. | |
68 | */ | |
69 | #define INITQFNAMES { \ | |
70 | "user", /* USRQUOTA */ \ | |
71 | "group", /* GRPQUOTA */ \ | |
72 | "undefined", \ | |
73 | }; | |
74 | #define QUOTAFILENAME "quota" | |
75 | #define QUOTAGROUP "operator" | |
76 | ||
77 | /* | |
78 | * Command definitions for the 'quotactl' system call. | |
79 | * The commands are broken into a main command defined below | |
80 | * and a subcommand that is used to convey the type of | |
81 | * quota that is being manipulated (see above). | |
82 | */ | |
83 | #define SUBCMDMASK 0x00ff | |
84 | #define SUBCMDSHIFT 8 | |
85 | #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK)) | |
86 | ||
87 | #define Q_QUOTAON 0x0100 /* enable quotas */ | |
88 | #define Q_QUOTAOFF 0x0200 /* disable quotas */ | |
89 | #define Q_GETQUOTA 0x0300 /* get limits and usage */ | |
90 | #define Q_SETQUOTA 0x0400 /* set limits and usage */ | |
91 | #define Q_SETUSE 0x0500 /* set usage */ | |
92 | #define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */ | |
93 | ||
94 | /* | |
95 | * The following structure defines the format of the disk quota file | |
96 | * (as it appears on disk) - the file is an array of these structures | |
97 | * indexed by user or group number. The setquota system call establishes | |
98 | * the vnode for each quota file (a pointer is retained in the ufsmount | |
99 | * structure). | |
100 | */ | |
101 | struct dqblk { | |
102 | u_long dqb_bhardlimit; /* absolute limit on disk blks alloc */ | |
103 | u_long dqb_bsoftlimit; /* preferred limit on disk blks */ | |
104 | u_long dqb_curblocks; /* current block count */ | |
105 | u_long dqb_ihardlimit; /* maximum # allocated inodes + 1 */ | |
106 | u_long dqb_isoftlimit; /* preferred inode limit */ | |
107 | u_long dqb_curinodes; /* current # allocated inodes */ | |
108 | time_t dqb_btime; /* time limit for excessive disk use */ | |
109 | time_t dqb_itime; /* time limit for excessive files */ | |
110 | }; | |
111 | ||
112 | #ifdef KERNEL | |
113 | /* | |
114 | * The following structure records disk usage for a user or group on a | |
115 | * filesystem. There is one allocated for each quota that exists on any | |
116 | * filesystem for the current user or group. A cache is kept of recently | |
117 | * used entries. | |
118 | */ | |
119 | struct dquot { | |
120 | struct dquot *dq_forw, *dq_back;/* MUST be first entry */ | |
121 | struct dquot *dq_freef, **dq_freeb; /* free list */ | |
122 | short dq_flags; /* flags, see below */ | |
123 | short dq_cnt; /* count of active references */ | |
124 | short dq_spare; /* unused spare padding */ | |
125 | short dq_type; /* quota type of this dquot */ | |
126 | u_long dq_id; /* identifier this applies to */ | |
127 | struct ufsmount *dq_ump; /* filesystem that this is taken from */ | |
128 | struct dqblk dq_dqb; /* actual usage & quotas */ | |
129 | }; | |
130 | /* | |
131 | * Flag values. | |
132 | */ | |
133 | #define DQ_LOCK 0x01 /* this quota locked (no MODS) */ | |
134 | #define DQ_WANT 0x02 /* wakeup on unlock */ | |
135 | #define DQ_MOD 0x04 /* this quota modified since read */ | |
136 | #define DQ_FAKE 0x08 /* no limits here, just usage */ | |
137 | #define DQ_BLKS 0x10 /* has been warned about blk limit */ | |
138 | #define DQ_INODS 0x20 /* has been warned about inode limit */ | |
139 | /* | |
140 | * Shorthand notation. | |
141 | */ | |
142 | #define dq_bhardlimit dq_dqb.dqb_bhardlimit | |
143 | #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit | |
144 | #define dq_curblocks dq_dqb.dqb_curblocks | |
145 | #define dq_ihardlimit dq_dqb.dqb_ihardlimit | |
146 | #define dq_isoftlimit dq_dqb.dqb_isoftlimit | |
147 | #define dq_curinodes dq_dqb.dqb_curinodes | |
148 | #define dq_btime dq_dqb.dqb_btime | |
149 | #define dq_itime dq_dqb.dqb_itime | |
150 | ||
151 | /* | |
152 | * If the system has never checked for a quota for this file, | |
153 | * then it is set to NODQUOT. Once a write attempt is made | |
154 | * the inode pointer is set to reference a dquot structure. | |
155 | */ | |
156 | #define NODQUOT ((struct dquot *) 0) | |
157 | ||
158 | /* | |
159 | * Flags to chkdq() and chkiq() | |
160 | */ | |
161 | #define FORCE 0x01 /* force usage changes independent of limits */ | |
162 | #define CHOWN 0x02 /* (advisory) change initiated by chown */ | |
163 | ||
164 | /* | |
165 | * Macros to avoid subroutine calls to trivial functions. | |
166 | */ | |
167 | #ifndef DIAGNOSTIC | |
168 | #define DQREF(dq) (dq)->dq_cnt++ | |
169 | #else | |
170 | #define DQREF(dq) dqref(dq) | |
171 | #endif /* DIAGNOSTIC */ | |
172 | ||
173 | #else | |
174 | ||
175 | #include <sys/cdefs.h> | |
176 | ||
177 | __BEGIN_DECLS | |
178 | int quotactl __P((const char *, int, int, void *)); | |
179 | __END_DECLS | |
180 | ||
181 | #endif /* KERNEL */ | |
182 | #endif /* _QUOTA_ */ |