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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 * Version: $Id: quota.h,v 1.8 1995/03/11 11:43:07 mvw Exp mvw $
37 */
38
39 #ifndef _LINUX_QUOTA_
40 #define _LINUX_QUOTA_
41
42 #include <linux/errno.h>
43
44 /*
45 * Convert diskblocks to blocks and the other way around.
46 * currently only to fool the BSD source. :-)
47 */
48 #define dbtob(num) (num << 10)
49 #define btodb(num) (num >> 10)
50
51 /*
52 * Convert count of filesystem blocks to diskquota blocks, meant
53 * for filesystems where i_blksize != BLOCK_SIZE
54 */
55 #define fs_to_dq_blocks(num, blksize) (((num) * (blksize)) / BLOCK_SIZE)
56
57 /*
58 * Definitions for disk quotas imposed on the average user
59 * (big brother finally hits Linux).
60 *
61 * The following constants define the amount of time given a user
62 * before the soft limits are treated as hard limits (usually resulting
63 * in an allocation failure). The timer is started when the user crosses
64 * their soft limit, it is reset when they go below their soft limit.
65 */
66 #define MAX_IQ_TIME 604800 /* (7*24*60*60) 1 week */
67 #define MAX_DQ_TIME 604800 /* (7*24*60*60) 1 week */
68
69 #define MAXQUOTAS 2
70 #define USRQUOTA 0 /* element used for user quotas */
71 #define GRPQUOTA 1 /* element used for group quotas */
72
73 /*
74 * Definitions for the default names of the quotas files.
75 */
76 #define INITQFNAMES { \
77 "user", /* USRQUOTA */ \
78 "group", /* GRPQUOTA */ \
79 "undefined", \
80 };
81
82 #define QUOTAFILENAME "quota"
83 #define QUOTAGROUP "staff"
84
85 #define NR_DQHASH 43 /* Just an arbitrary number any suggestions ? */
86 #define NR_DQUOTS 256 /* Number of quotas active at one time */
87
88 /*
89 * Command definitions for the 'quotactl' system call.
90 * The commands are broken into a main command defined below
91 * and a subcommand that is used to convey the type of
92 * quota that is being manipulated (see above).
93 */
94 #define SUBCMDMASK 0x00ff
95 #define SUBCMDSHIFT 8
96 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
97
98 #define Q_QUOTAON 0x0100 /* enable quotas */
99 #define Q_QUOTAOFF 0x0200 /* disable quotas */
100 #define Q_GETQUOTA 0x0300 /* get limits and usage */
101 #define Q_SETQUOTA 0x0400 /* set limits and usage */
102 #define Q_SETUSE 0x0500 /* set usage */
103 #define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
104 #define Q_SETQLIM 0x0700 /* set limits */
105 #define Q_GETSTATS 0x0800 /* get collected stats */
106
107 /*
108 * The following structure defines the format of the disk quota file
109 * (as it appears on disk) - the file is an array of these structures
110 * indexed by user or group number.
111 */
112 struct dqblk {
113 __u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */
114 __u32 dqb_bsoftlimit; /* preferred limit on disk blks */
115 __u32 dqb_curblocks; /* current block count */
116 __u32 dqb_ihardlimit; /* maximum # allocated inodes */
117 __u32 dqb_isoftlimit; /* preferred inode limit */
118 __u32 dqb_curinodes; /* current # allocated inodes */
119 time_t dqb_btime; /* time limit for excessive disk use */
120 time_t dqb_itime; /* time limit for excessive files */
121 };
122
123 /*
124 * Shorthand notation.
125 */
126 #define dq_bhardlimit dq_dqb.dqb_bhardlimit
127 #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
128 #define dq_curblocks dq_dqb.dqb_curblocks
129 #define dq_ihardlimit dq_dqb.dqb_ihardlimit
130 #define dq_isoftlimit dq_dqb.dqb_isoftlimit
131 #define dq_curinodes dq_dqb.dqb_curinodes
132 #define dq_btime dq_dqb.dqb_btime
133 #define dq_itime dq_dqb.dqb_itime
134
135 #define dqoff(UID) ((off_t)((UID) * sizeof (struct dqblk)))
136
137 struct dqstats {
138 __u32 lookups;
139 __u32 drops;
140 __u32 reads;
141 __u32 writes;
142 __u32 cache_hits;
143 __u32 pages_allocated;
144 __u32 allocated_dquots;
145 __u32 free_dquots;
146 __u32 syncs;
147 };
148
149 #ifdef __KERNEL__
150
151 #include <linux/mount.h>
152
153 /*
154 * Maximum length of a message generated in the quota system,
155 * that needs to be kicked onto the tty.
156 */
157 #define MAX_QUOTA_MESSAGE 75
158
159 #define DQ_LOCKED 0x01 /* locked for update */
160 #define DQ_WANT 0x02 /* wanted for update */
161 #define DQ_MOD 0x04 /* dquot modified since read */
162 #define DQ_BLKS 0x10 /* uid/gid has been warned about blk limit */
163 #define DQ_INODES 0x20 /* uid/gid has been warned about inode limit */
164 #define DQ_FAKE 0x40 /* no limits only usage */
165
166 struct dquot {
167 unsigned int dq_id; /* id this applies to (uid, gid) */
168 short dq_type; /* type of quota */
169 kdev_t dq_dev; /* Device this applies to */
170 short dq_flags; /* see DQ_* */
171 short dq_count; /* reference count */
172 struct vfsmount *dq_mnt; /* vfsmountpoint this applies to */
173 struct dqblk dq_dqb; /* diskquota usage */
174 struct wait_queue *dq_wait; /* pointer to waitqueue */
175 struct dquot *dq_prev; /* pointer to prev dquot */
176 struct dquot *dq_next; /* pointer to next dquot */
177 struct dquot *dq_hash_prev; /* pointer to prev dquot */
178 struct dquot *dq_hash_next; /* pointer to next dquot */
179 };
180
181 #define NODQUOT (struct dquot *)NULL
182
183 /*
184 * Flags used for set_dqblk.
185 */
186 #define QUOTA_SYSCALL 0x01
187 #define SET_QUOTA 0x02
188 #define SET_USE 0x04
189 #define SET_QLIMIT 0x08
190
191 #define QUOTA_OK 0
192 #define NO_QUOTA 1
193
194 /*
195 * declaration of quota_function calls in kernel.
196 */
197
198 extern void dquot_initialize(struct inode *inode, short type);
199 extern void dquot_drop(struct inode *inode);
200 extern int dquot_alloc_block(const struct inode *inode, unsigned long number);
201 extern int dquot_alloc_inode(const struct inode *inode, unsigned long number);
202 extern void dquot_free_block(const struct inode *inode, unsigned long number);
203 extern void dquot_free_inode(const struct inode *inode, unsigned long number);
204 extern int dquot_transfer(struct inode *inode, struct iattr *iattr, char direction);
205
206 extern void invalidate_dquots(kdev_t dev, short type);
207 extern int quota_off(kdev_t dev, short type);
208 extern int sync_dquots(kdev_t dev, short type);
209
210 #else
211
212 #include <sys/cdefs.h>
213
214 __BEGIN_DECLS
215 int quotactl __P ((int, const char *, int, caddr_t));
216 __END_DECLS
217
218 #endif /* __KERNEL__ */
219 #endif /* _QUOTA_ */
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*/