* Copyright (c) 1982, 1986 Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* Robert Elz at The University of Melbourne.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
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* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* @(#)quota.h 7.9 (Berkeley) 2/22/91
* Definitions for disk quotas imposed on the average user
* (big brother finally hits UNIX).
* The following constants define the amount of time given a user
* before the soft limits are treated as hard limits (usually resulting
* in an allocation failure). The timer is started when the user crosses
* their soft limit, it is reset when they go below their soft limit.
#define MAX_IQ_TIME (7*24*60*60) /* 1 week */
#define MAX_DQ_TIME (7*24*60*60) /* 1 week */
* The following constants define the usage of the quota file array
* in the ufsmount structure and dquot array in the inode structure.
* The semantics of the elements of these arrays are defined in the
* routine getinoquota; the remainder of the quota code treats them
* generically and need not be inspected when changing the size of
#define USRQUOTA 0 /* element used for user quotas */
#define GRPQUOTA 1 /* element used for group quotas */
* Definitions for the default names of the quotas files.
"group", /* GRPQUOTA */ \
#define QUOTAFILENAME "quota"
#define QUOTAGROUP "operator"
* Command definitions for the 'quotactl' system call.
* The commands are broken into a main command defined below
* and a subcommand that is used to convey the type of
* quota that is being manipulated (see above).
#define SUBCMDMASK 0x00ff
#define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
#define Q_QUOTAON 0x0100 /* enable quotas */
#define Q_QUOTAOFF 0x0200 /* disable quotas */
#define Q_GETQUOTA 0x0300 /* get limits and usage */
#define Q_SETQUOTA 0x0400 /* set limits and usage */
#define Q_SETUSE 0x0500 /* set usage */
#define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
* The following structure defines the format of the disk quota file
* (as it appears on disk) - the file is an array of these structures
* indexed by user or group number. The setquota system call establishes
* the vnode for each quota file (a pointer is retained in the ufsmount
u_long dqb_bhardlimit
; /* absolute limit on disk blks alloc */ u_long dqb_bsoftlimit
; /* preferred limit on disk blks */ u_long dqb_curblocks
; /* current block count */ u_long dqb_ihardlimit
; /* maximum # allocated inodes + 1 */ u_long dqb_isoftlimit
; /* preferred inode limit */ u_long dqb_curinodes
; /* current # allocated inodes */ time_t dqb_btime
; /* time limit for excessive disk use */
time_t dqb_itime
; /* time limit for excessive files */
* The following structure records disk usage for a user or group on a
* filesystem. There is one allocated for each quota that exists on any
* filesystem for the current user or group. A cache is kept of recently
struct dquot
*dq_forw
, *dq_back
;/* MUST be first entry */
struct dquot
*dq_freef
, **dq_freeb
; /* free list */
short dq_flags
; /* flags, see below */
short dq_cnt
; /* count of active references */
short dq_spare
; /* unused spare padding */
short dq_type
; /* quota type of this dquot */
u_long dq_id
; /* identifier this applies to */ struct ufsmount
*dq_ump
; /* filesystem that this is taken from */
struct dqblk dq_dqb
; /* actual usage & quotas */
#define DQ_LOCK 0x01 /* this quota locked (no MODS) */
#define DQ_WANT 0x02 /* wakeup on unlock */
#define DQ_MOD 0x04 /* this quota modified since read */
#define DQ_FAKE 0x08 /* no limits here, just usage */
#define DQ_BLKS 0x10 /* has been warned about blk limit */
#define DQ_INODS 0x20 /* has been warned about inode limit */
#define dq_bhardlimit dq_dqb.dqb_bhardlimit
#define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
#define dq_curblocks dq_dqb.dqb_curblocks
#define dq_ihardlimit dq_dqb.dqb_ihardlimit
#define dq_isoftlimit dq_dqb.dqb_isoftlimit
#define dq_curinodes dq_dqb.dqb_curinodes
#define dq_btime dq_dqb.dqb_btime
#define dq_itime dq_dqb.dqb_itime
* If the system has never checked for a quota for this file,
* then it is set to NODQUOT. Once a write attempt is made
* the inode pointer is set to reference a dquot structure.
#define NODQUOT ((struct dquot *) 0)
* Flags to chkdq() and chkiq()
#define FORCE 0x01 /* force usage changes independent of limits */
#define CHOWN 0x02 /* (advisory) change initiated by chown */
* Macros to avoid subroutine calls to trivial functions.
#define DQREF(dq) (dq)->dq_cnt++
#define DQREF(dq) dqref(dq)
int quotactl
__P((const char *, int, int, void *));
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