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/*
* Mach Operating System
* Copyright (c) 1989 Carnegie-Mellon University
* Copyright (c) 1988 Carnegie-Mellon University
* Copyright (c) 1987 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* HISTORY
* $Log: quota.h,v $
* 27-Sep-89 Morris Meyer (mmeyer) at NeXT
* NeXT: NFS 4.0 Changes: Make sure this doesn't get compiled for VFS.
*
* Revision 2.4 89/03/09 22:06:56 rpd
* More cleanup.
*
* Revision 2.3 89/02/25 17:55:42 gm0w
* Changes for cleanup.
*
* 3-Mar-88 Michael Young (mwyoung) at Carnegie-Mellon University
* Corrected uses of "defined(QUOTA)".
*
* 25-Jun-87 William Bolosky (bolosky) at Carnegie-Mellon University
* Made QUOTA a #if-style option.
*
*/
/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
* @(#)quota.h 7.1 (Berkeley) 6/4/86
*/
/*
* MELBOURNE DISC QUOTAS
*
* Various junk to do with various quotas (etc) imposed upon
* the average user (big brother finally hits UNIX).
*
* The following structure exists in core for each logged on user.
* It contains global junk relevant to that user's quotas.
*
* The u_quota field of each user struct contains a pointer to
* the quota struct relevant to the current process, this is changed
* by 'setuid' sys call, &/or by the Q_SETUID quota() call.
*/
#ifndef _SYS_QUOTA_H_
#define _SYS_QUOTA_H_
#ifndef NeXT
#if KERNEL
#import <quota.h>
#endif
#import <sys/types.h>
#import <sys/param.h> /* for NMOUNT */
struct quota {
struct quota *q_forw, *q_back; /* hash chain, MUST be first */
short q_cnt; /* ref count (# processes) */
uid_t q_uid; /* real uid of owner */
int q_flags; /* struct management flags */
#define Q_LOCK 0x01 /* quota struct locked (for disc i/o) */
#define Q_WANT 0x02 /* issue a wakeup when lock goes off */
#define Q_NEW 0x04 /* new quota - no proc1 msg sent yet */
#define Q_NDQ 0x08 /* account has NO disc quota */
struct quota *q_freef, **q_freeb;
struct dquot *q_dq[NMOUNT]; /* disc quotas for mounted filesys's */
};
#define NOQUOTA ((struct quota *) 0)
#if defined(KERNEL) && QUOTA
extern struct quota *quota, *quotaNQUOTA;
extern int nquota;
extern struct quota *getquota(), *qfind();
#endif
/*
* The following structure defines the format of the disc quota file
* (as it appears on disc) - the file is an array of these structures
* indexed by user number. The setquota sys call establishes the inode
* for each quota file (a pointer is retained in the mount structure).
*
* The following constants define the number of warnings given a user
* before the soft limits are treated as hard limits (usually resulting
* in an allocation failure). The warnings are normally manipulated
* each time a user logs in through the Q_DOWARN quota call. If
* the user logs in and is under the soft limit the warning count
* is reset to MAX_*_WARN, otherwise a message is printed and the
* warning count is decremented. This makes MAX_*_WARN equivalent to
* the number of logins before soft limits are treated as hard limits.
*/
#define MAX_IQ_WARN 3
#define MAX_DQ_WARN 3
struct dqblk {
u_long dqb_bhardlimit; /* absolute limit on disc blks alloc */
u_long dqb_bsoftlimit; /* preferred limit on disc blks */
u_long dqb_curblocks; /* current block count */
u_short dqb_ihardlimit; /* maximum # allocated inodes + 1 */
u_short dqb_isoftlimit; /* preferred inode limit */
u_short dqb_curinodes; /* current # allocated inodes */
u_char dqb_bwarn; /* # warnings left about excessive disc use */
u_char dqb_iwarn; /* # warnings left about excessive inodes */
};
/*
* The following structure records disc usage for a user on a filesystem.
* There is one allocated for each quota that exists on any filesystem
* for the current user. A cache is kept of other recently used entries.
*/
struct dquot {
struct dquot *dq_forw, *dq_back;/* MUST be first entry */
union {
struct quota *Dq_own; /* the quota that points to this */
struct { /* free list */
struct dquot *Dq_freef, **Dq_freeb;
} dq_f;
} dq_u;
short dq_flags;
#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 */
short dq_cnt; /* count of active references */
uid_t dq_uid; /* user this applies to */
dev_t dq_dev; /* filesystem this relates to */
struct dqblk dq_dqb; /* actual usage & quotas */
};
#define dq_own dq_u.Dq_own
#define dq_freef dq_u.dq_f.Dq_freef
#define dq_freeb dq_u.dq_f.Dq_freeb
#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_bwarn dq_dqb.dqb_bwarn
#define dq_iwarn dq_dqb.dqb_iwarn
#define NODQUOT ((struct dquot *) 0)
#define LOSTDQUOT ((struct dquot *) 1)
#if defined(KERNEL) && QUOTA
extern struct dquot *dquot, *dquotNDQUOT;
extern int ndquot;
extern struct dquot *discquota(), *inoquota(), *dqalloc(), *dqp();
#endif
/*
* Definitions for the 'quota' system call.
*/
#define Q_SETDLIM 1 /* set disc limits & usage */
#define Q_GETDLIM 2 /* get disc limits & usage */
#define Q_SETDUSE 3 /* set disc usage only */
#define Q_SYNC 4 /* update disc copy of quota usages */
#define Q_SETUID 16 /* change proc to use quotas for uid */
#define Q_SETWARN 25 /* alter inode/block warning counts */
#define Q_DOWARN 26 /* warn user about excessive space/inodes */
/*
* Used in Q_SETDUSE.
*/
struct dqusage {
u_short du_curinodes;
u_long du_curblocks;
};
/*
* Used in Q_SETWARN.
*/
struct dqwarn {
u_char dw_bwarn;
u_char dw_iwarn;
};
#endif
#endif
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