diff options
Diffstat (limited to 'sys/ufs/ufs/quota.h')
-rw-r--r-- | sys/ufs/ufs/quota.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/sys/ufs/ufs/quota.h b/sys/ufs/ufs/quota.h new file mode 100644 index 000000000000..11efb402c91c --- /dev/null +++ b/sys/ufs/ufs/quota.h @@ -0,0 +1,207 @@ +/* + * Copyright (c) 1982, 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * 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 + * are met: + * 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 + * notice, this list of conditions and the following disclaimer in the + * 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 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)quota.h 8.1 (Berkeley) 6/11/93 + */ + +#ifndef _QUOTA_ +#define _QUOTA_ + +/* + * 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 the array. + */ +#define MAXQUOTAS 2 +#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. + */ +#define INITQFNAMES { \ + "user", /* USRQUOTA */ \ + "group", /* GRPQUOTA */ \ + "undefined", \ +}; +#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 SUBCMDSHIFT 8 +#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 + * structure). + */ +struct dqblk { + 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 + * used entries. + */ +struct dquot { + struct dquot *dq_forw, **dq_back; /* hash list */ + 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 */ +}; +/* + * Flag values. + */ +#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 */ +/* + * Shorthand notation. + */ +#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. + */ +#ifdef DIAGNOSTIC +#define DQREF(dq) dqref(dq) +#else +#define DQREF(dq) (dq)->dq_cnt++ +#endif + +#include <sys/cdefs.h> + +struct dquot; +struct inode; +struct mount; +struct proc; +struct ucred; +struct ufsmount; +struct vnode; +__BEGIN_DECLS +int chkdq __P((struct inode *, long, struct ucred *, int)); +int chkdqchg __P((struct inode *, long, struct ucred *, int)); +int chkiq __P((struct inode *, long, struct ucred *, int)); +int chkiqchg __P((struct inode *, long, struct ucred *, int)); +void dqflush __P((struct vnode *)); +int dqget __P((struct vnode *, + u_long, struct ufsmount *, int, struct dquot **)); +void dqinit __P((void)); +void dqref __P((struct dquot *)); +void dqrele __P((struct vnode *, struct dquot *)); +int dqsync __P((struct vnode *, struct dquot *)); +int getinoquota __P((struct inode *)); +int getquota __P((struct mount *, u_long, int, caddr_t)); +int qsync __P((struct mount *mp)); +int quotaoff __P((struct proc *, struct mount *, int)); +int quotaon __P((struct proc *, struct mount *, int, caddr_t)); +int setquota __P((struct mount *, u_long, int, caddr_t)); +int setuse __P((struct mount *, u_long, int, caddr_t)); +int ufs_quotactl __P((struct mount *, int, uid_t, caddr_t, struct proc *)); +__END_DECLS + +#ifdef DIAGNOSTIC +__BEGIN_DECLS +void chkdquot __P((struct inode *)); +__END_DECLS +#endif + +#endif /* _QUOTA_ */ |