209 lines
7.9 KiB
C
209 lines
7.9 KiB
C
/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Robert Elz at The University of Melbourne.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)quota.h 7.9 (Berkeley) 2/22/91
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* $Id$
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*/
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#ifndef _QUOTA_
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#define _QUOTA_
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/*
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* Definitions for disk quotas imposed on the average user
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* (big brother finally hits UNIX).
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*
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* The following constants define the amount of time given a user
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* before the soft limits are treated as hard limits (usually resulting
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* in an allocation failure). The timer is started when the user crosses
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* their soft limit, it is reset when they go below their soft limit.
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*/
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#define MAX_IQ_TIME (7*24*60*60) /* 1 week */
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#define MAX_DQ_TIME (7*24*60*60) /* 1 week */
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/*
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* The following constants define the usage of the quota file array
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* in the ufsmount structure and dquot array in the inode structure.
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* The semantics of the elements of these arrays are defined in the
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* routine getinoquota; the remainder of the quota code treats them
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* generically and need not be inspected when changing the size of
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* the array.
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*/
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enum quotatype {
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USRQUOTA = 0, /* element used for user quotas */
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GRPQUOTA = 1, /* element used for group quotas */
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MAXQUOTAS = 2
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};
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/*
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* Definitions for the default names of the quotas files.
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*/
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#define INITQFNAMES { \
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"user", /* USRQUOTA */ \
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"group", /* GRPQUOTA */ \
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"undefined", \
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};
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#define QUOTAFILENAME "quota"
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#define QUOTAGROUP "operator"
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/*
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* Command definitions for the 'quotactl' system call.
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* The commands are broken into a main command defined below
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* and a subcommand that is used to convey the type of
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* quota that is being manipulated (see above).
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*/
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#define SUBCMDMASK 0x00ff
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#define SUBCMDSHIFT 8
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#define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
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#define Q_QUOTAON 0x0100 /* enable quotas */
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#define Q_QUOTAOFF 0x0200 /* disable quotas */
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#define Q_GETQUOTA 0x0300 /* get limits and usage */
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#define Q_SETQUOTA 0x0400 /* set limits and usage */
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#define Q_SETUSE 0x0500 /* set usage */
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#define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
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/*
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* The following structure defines the format of the disk quota file
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* (as it appears on disk) - the file is an array of these structures
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* indexed by user or group number. The setquota system call establishes
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* the vnode for each quota file (a pointer is retained in the ufsmount
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* structure).
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*/
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struct dqblk {
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u_long dqb_bhardlimit; /* absolute limit on disk blks alloc */
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u_long dqb_bsoftlimit; /* preferred limit on disk blks */
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u_long dqb_curblocks; /* current block count */
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u_long dqb_ihardlimit; /* maximum # allocated inodes + 1 */
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u_long dqb_isoftlimit; /* preferred inode limit */
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u_long dqb_curinodes; /* current # allocated inodes */
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time_t dqb_btime; /* time limit for excessive disk use */
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time_t dqb_itime; /* time limit for excessive files */
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};
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#ifdef KERNEL
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/*
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* The following structure records disk usage for a user or group on a
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* filesystem. There is one allocated for each quota that exists on any
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* filesystem for the current user or group. A cache is kept of recently
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* used entries.
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*/
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struct dquot {
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struct dquot *dq_forw, *dq_back;/* MUST be first entry */
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struct dquot *dq_freef, **dq_freeb; /* free list */
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short dq_flags; /* flags, see below */
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short dq_cnt; /* count of active references */
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short dq_spare; /* unused spare padding */
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short dq_type; /* quota type of this dquot */
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u_long dq_id; /* identifier this applies to */
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struct ufsmount *dq_ump; /* filesystem that this is taken from */
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struct dqblk dq_dqb; /* actual usage & quotas */
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};
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/*
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* Flag values.
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*/
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#define DQ_LOCK 0x01 /* this quota locked (no MODS) */
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#define DQ_WANT 0x02 /* wakeup on unlock */
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#define DQ_MOD 0x04 /* this quota modified since read */
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#define DQ_FAKE 0x08 /* no limits here, just usage */
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#define DQ_BLKS 0x10 /* has been warned about blk limit */
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#define DQ_INODS 0x20 /* has been warned about inode limit */
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/*
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* Shorthand notation.
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*/
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#define dq_bhardlimit dq_dqb.dqb_bhardlimit
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#define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
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#define dq_curblocks dq_dqb.dqb_curblocks
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#define dq_ihardlimit dq_dqb.dqb_ihardlimit
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#define dq_isoftlimit dq_dqb.dqb_isoftlimit
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#define dq_curinodes dq_dqb.dqb_curinodes
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#define dq_btime dq_dqb.dqb_btime
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#define dq_itime dq_dqb.dqb_itime
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/*
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* If the system has never checked for a quota for this file,
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* then it is set to NODQUOT. Once a write attempt is made
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* the inode pointer is set to reference a dquot structure.
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*/
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#define NODQUOT ((struct dquot *) 0)
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/*
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* Flags to chkdq() and chkiq()
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*/
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#define FORCE 0x01 /* force usage changes independent of limits */
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#define CHOWN 0x02 /* (advisory) change initiated by chown */
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/*
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* Macros to avoid subroutine calls to trivial functions.
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*/
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#ifndef DIAGNOSTIC
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#define DQREF(dq) (dq)->dq_cnt++
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#else
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#define DQREF(dq) dqref(dq)
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#endif /* DIAGNOSTIC */
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struct inode; struct ucred; struct mount; struct vnode;
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int getinoquota(struct inode *);
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int chkdq(struct inode *, long, struct ucred *, int);
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int chkdqchg(struct inode *, long, struct ucred *, enum quotatype);
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int chkiq(struct inode *, long, struct ucred *, int);
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int chkiqchg(struct inode *, long, struct ucred *, enum quotatype);
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#ifdef DIAGNOSTIC
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void chkdquot(struct inode *);
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#endif
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int quotaon(struct proc *, struct mount *, enum quotatype, caddr_t);
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int quotaoff(struct proc *, struct mount *, enum quotatype);
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int getquota(struct mount *, u_long, enum quotatype, caddr_t);
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int setquota(struct mount *, u_long, enum quotatype, caddr_t);
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int setuse(struct mount *, u_long, enum quotatype, caddr_t);
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int qsync(struct mount *);
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void dqinit(void);
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int dqget(struct vnode *, u_long, struct ufsmount *, enum quotatype, struct dquot **);
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void dqref(struct dquot *);
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void dqrele(struct vnode *, struct dquot *);
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int dqsync(struct vnode *, struct dquot *);
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void dqflush(struct vnode *);
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#else
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#include "cdefs.h"
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__BEGIN_DECLS
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int quotactl __P((const char *, int, int, void *));
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__END_DECLS
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#endif /* KERNEL */
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#endif /* _QUOTA_ */
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