/* * Copyright (c) 1982, 1986 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. * * %sccs.include.redist.c% * * @(#)quota.h 7.10 (Berkeley) 11/01/91 */ #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;/* 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 */ }; /* * 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 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, u_int, caddr_t, struct proc *)); __END_DECLS #ifdef DIAGNOSTIC __BEGIN_DECLS void chkdquot __P((struct inode *)); __END_DECLS #endif #endif /* _QUOTA_ */