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1.1 root 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_ */
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