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- /*
- * $Header: /ax/networking:include/sys/quota.h:networking 1.1 $
- * $Source: /ax/networking:include/sys/quota.h: $
- *
- * Copyright (c) 1988 Acorn Computers Ltd., Cambridge, England
- *
- * $Log: quota.h,v $
- * Revision 1.1 95/01/11 10:19:37 kwelton
- * Initial revision
- *
- * Revision 1.3 88/06/17 20:20:35 beta
- * Acorn Unix initial beta version
- *
- */
- /* @(#)quota.h 1.2 87/05/15 3.2/4.3NFSSRC */
- /*
- * 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.
- */
- 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) && defined(QUOTA)
- #ifdef DYNALLOC
- struct quota *quota, *quotaNQUOTA;
- #else DYNALLOC
- struct quota stat_quota[NQUOTA], *quota, *quotaNQUOTA;
- #endif DYNALLOC
- int nquota;
- 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) && defined(QUOTA)
- #ifdef DYNALLOC
- struct dquot *dquot, *dquotNDQUOT;
- #else DYNALLOC
- struct dquot stat_dquot[NDQUOT], *dquot, *dquotNDQUOT;
- #endif DYNALLOC
- int ndquot;
- 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;
- };
-
- /* EOF quota.h */
-