sysdeps/unix/sysv/linux/sys/quota.h

   1 /* This just represents the non-kernel parts of <linux/quota.h>.
   2  *
   3  * here's the corresponding copyright:
   4  * Copyright (c) 1982, 1986 Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Robert Elz at The University of Melbourne.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 4. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * Version: $Id$
  35  */
  36
  37 #ifndef _SYS_QUOTA_H
  38 #define _SYS_QUOTA_H 1
  39
  40 #include <features.h>
  41 #include <sys/types.h>
  42
  43 /*
  44  * Convert diskblocks to blocks and the other way around.
  45  * currently only to fool the BSD source. :-)
  46  */
  47 #define dbtob(num) ((num) << 10)
  48 #define btodb(num) ((num) >> 10)
  49
  50 /*
  51  * Convert count of filesystem blocks to diskquota blocks, meant
  52  * for filesystems where i_blksize != BLOCK_SIZE
  53  */
  54 #define fs_to_dq_blocks(num, blksize) (((num) * (blksize)) / BLOCK_SIZE)
  55
  56 /*
  57  * Definitions for disk quotas imposed on the average user
  58  * (big brother finally hits Linux).
  59  *
  60  * The following constants define the amount of time given a user
  61  * before the soft limits are treated as hard limits (usually resulting
  62  * in an allocation failure). The timer is started when the user crosses
  63  * their soft limit, it is reset when they go below their soft limit.
  64  */
  65 #define MAX_IQ_TIME  604800     /* (7*24*60*60) 1 week */
  66 #define MAX_DQ_TIME  604800     /* (7*24*60*60) 1 week */
  67
  68 #define MAXQUOTAS 2
  69 #define USRQUOTA  0             /* element used for user quotas */
  70 #define GRPQUOTA  1             /* element used for group quotas */
  71
  72 /*
  73  * Definitions for the default names of the quotas files.
  74  */
  75 #define INITQFNAMES { \
  76    "user",      /* USRQUOTA */ \
  77    "group",   /* GRPQUOTA */ \
  78    "undefined", \
  79 };
  80
  81 #define QUOTAFILENAME "quota"
  82 #define QUOTAGROUP "staff"
  83
  84 #define NR_DQHASH 43          /* Just an arbitrary number any suggestions ? */
  85 #define NR_DQUOTS 256         /* Number of quotas active at one time */
  86
  87 /*
  88  * Command definitions for the 'quotactl' system call.
  89  * The commands are broken into a main command defined below
  90  * and a subcommand that is used to convey the type of
  91  * quota that is being manipulated (see above).
  92  */
  93 #define SUBCMDMASK  0x00ff
  94 #define SUBCMDSHIFT 8
  95 #define QCMD(cmd, type)  (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
  96
  97 #define Q_QUOTAON  0x0100       /* enable quotas */
  98 #define Q_QUOTAOFF 0x0200       /* disable quotas */
  99 #define Q_GETQUOTA 0x0300       /* get limits and usage */
 100 #define Q_SETQUOTA 0x0400       /* set limits and usage */
 101 #define Q_SETUSE   0x0500       /* set usage */
 102 #define Q_SYNC     0x0600       /* sync disk copy of a filesystems quotas */
 103 #define Q_SETQLIM  0x0700       /* set limits */
 104 #define Q_GETSTATS 0x0800       /* get collected stats */
 105 #define Q_RSQUASH  0x1000       /* set root_squash option */
 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   {
 114     u_int32_t dqb_bhardlimit;   /* absolute limit on disk blks alloc */
 115     u_int32_t dqb_bsoftlimit;   /* preferred limit on disk blks */
 116     u_int32_t dqb_curblocks;    /* current block count */
 117     u_int32_t dqb_ihardlimit;   /* maximum # allocated inodes */
 118     u_int32_t dqb_isoftlimit;   /* preferred inode limit */
 119     u_int32_t dqb_curinodes;    /* current # allocated inodes */
 120     time_t dqb_btime;           /* time limit for excessive disk use */
 121     time_t dqb_itime;           /* time limit for excessive files */
 122   };
 123
 124 /*
 125  * Shorthand notation.
 126  */
 127 #define dq_bhardlimit   dq_dqb.dqb_bhardlimit
 128 #define dq_bsoftlimit   dq_dqb.dqb_bsoftlimit
 129 #define dq_curblocks    dq_dqb.dqb_curblocks
 130 #define dq_ihardlimit   dq_dqb.dqb_ihardlimit
 131 #define dq_isoftlimit   dq_dqb.dqb_isoftlimit
 132 #define dq_curinodes    dq_dqb.dqb_curinodes
 133 #define dq_btime        dq_dqb.dqb_btime
 134 #define dq_itime        dq_dqb.dqb_itime
 135
 136 #define dqoff(UID)      ((loff_t)((UID) * sizeof (struct dqblk)))
 137
 138 struct dqstats
 139   {
 140     u_int32_t lookups;
 141     u_int32_t drops;
 142     u_int32_t reads;
 143     u_int32_t writes;
 144     u_int32_t cache_hits;
 145     u_int32_t pages_allocated;
 146     u_int32_t allocated_dquots;
 147     u_int32_t free_dquots;
 148     u_int32_t syncs;
 149   };
 150
 151 __BEGIN_DECLS
 152
 153 extern int quotactl (int __cmd, const char *__special, int __id,
 154                      caddr_t __addr) __THROW;
 155
 156 __END_DECLS
 157
 158 #endif /* sys/quota.h */