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_ */ 183