1 /* 2 * Copyright (c) 1982, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Robert Elz at The University of Melbourne. 7 * 8 * %sccs.include.redist.c% 9 * 10 * @(#)quota.h 8.3 (Berkeley) 08/19/94 11 */ 12 13 #ifndef _QUOTA_ 14 #define _QUOTA_ 15 16 /* 17 * Definitions for disk quotas imposed on the average user 18 * (big brother finally hits UNIX). 19 * 20 * The following constants define the amount of time given a user before the 21 * soft limits are treated as hard limits (usually resulting in an allocation 22 * failure). The timer is started when the user crosses their soft limit, it 23 * is reset when they go below their soft limit. 24 */ 25 #define MAX_IQ_TIME (7*24*60*60) /* seconds in 1 week */ 26 #define MAX_DQ_TIME (7*24*60*60) /* seconds in 1 week */ 27 28 /* 29 * The following constants define the usage of the quota file array in the 30 * ufsmount structure and dquot array in the inode structure. The semantics 31 * of the elements of these arrays are defined in the routine getinoquota; 32 * the remainder of the quota code treats them generically and need not be 33 * inspected when changing the size of the array. 34 */ 35 #define MAXQUOTAS 2 36 #define USRQUOTA 0 /* element used for user quotas */ 37 #define GRPQUOTA 1 /* element used for group quotas */ 38 39 /* 40 * Definitions for the default names of the quotas files. 41 */ 42 #define INITQFNAMES { \ 43 "user", /* USRQUOTA */ \ 44 "group", /* GRPQUOTA */ \ 45 "undefined", \ 46 }; 47 #define QUOTAFILENAME "quota" 48 #define QUOTAGROUP "operator" 49 50 /* 51 * Command definitions for the 'quotactl' system call. The commands are 52 * broken into a main command defined below and a subcommand that is used 53 * to convey the type of quota that is being manipulated (see above). 54 */ 55 #define SUBCMDMASK 0x00ff 56 #define SUBCMDSHIFT 8 57 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK)) 58 59 #define Q_QUOTAON 0x0100 /* enable quotas */ 60 #define Q_QUOTAOFF 0x0200 /* disable quotas */ 61 #define Q_GETQUOTA 0x0300 /* get limits and usage */ 62 #define Q_SETQUOTA 0x0400 /* set limits and usage */ 63 #define Q_SETUSE 0x0500 /* set usage */ 64 #define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */ 65 66 /* 67 * The following structure defines the format of the disk quota file 68 * (as it appears on disk) - the file is an array of these structures 69 * indexed by user or group number. The setquota system call establishes 70 * the vnode for each quota file (a pointer is retained in the ufsmount 71 * structure). 72 */ 73 struct dqblk { 74 u_int32_t dqb_bhardlimit; /* absolute limit on disk blks alloc */ 75 u_int32_t dqb_bsoftlimit; /* preferred limit on disk blks */ 76 u_int32_t dqb_curblocks; /* current block count */ 77 u_int32_t dqb_ihardlimit; /* maximum # allocated inodes + 1 */ 78 u_int32_t dqb_isoftlimit; /* preferred inode limit */ 79 u_int32_t dqb_curinodes; /* current # allocated inodes */ 80 time_t dqb_btime; /* time limit for excessive disk use */ 81 time_t dqb_itime; /* time limit for excessive files */ 82 }; 83 84 /* 85 * The following structure records disk usage for a user or group on a 86 * filesystem. There is one allocated for each quota that exists on any 87 * filesystem for the current user or group. A cache is kept of recently 88 * used entries. 89 */ 90 struct dquot { 91 LIST_ENTRY(dquot) dq_hash; /* hash list */ 92 TAILQ_ENTRY(dquot) dq_freelist; /* free list */ 93 u_int16_t dq_flags; /* flags, see below */ 94 u_int16_t dq_cnt; /* count of active references */ 95 u_int16_t dq_spare; /* unused spare padding */ 96 u_int16_t dq_type; /* quota type of this dquot */ 97 u_int32_t dq_id; /* identifier this applies to */ 98 struct ufsmount *dq_ump; /* filesystem that this is taken from */ 99 struct dqblk dq_dqb; /* actual usage & quotas */ 100 }; 101 /* 102 * Flag values. 103 */ 104 #define DQ_LOCK 0x01 /* this quota locked (no MODS) */ 105 #define DQ_WANT 0x02 /* wakeup on unlock */ 106 #define DQ_MOD 0x04 /* this quota modified since read */ 107 #define DQ_FAKE 0x08 /* no limits here, just usage */ 108 #define DQ_BLKS 0x10 /* has been warned about blk limit */ 109 #define DQ_INODS 0x20 /* has been warned about inode limit */ 110 /* 111 * Shorthand notation. 112 */ 113 #define dq_bhardlimit dq_dqb.dqb_bhardlimit 114 #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit 115 #define dq_curblocks dq_dqb.dqb_curblocks 116 #define dq_ihardlimit dq_dqb.dqb_ihardlimit 117 #define dq_isoftlimit dq_dqb.dqb_isoftlimit 118 #define dq_curinodes dq_dqb.dqb_curinodes 119 #define dq_btime dq_dqb.dqb_btime 120 #define dq_itime dq_dqb.dqb_itime 121 122 /* 123 * If the system has never checked for a quota for this file, then it is 124 * set to NODQUOT. Once a write attempt is made the inode pointer is set 125 * to reference a dquot structure. 126 */ 127 #define NODQUOT NULL 128 129 /* 130 * Flags to chkdq() and chkiq() 131 */ 132 #define FORCE 0x01 /* force usage changes independent of limits */ 133 #define CHOWN 0x02 /* (advisory) change initiated by chown */ 134 135 /* 136 * Macros to avoid subroutine calls to trivial functions. 137 */ 138 #ifdef DIAGNOSTIC 139 #define DQREF(dq) dqref(dq) 140 #else 141 #define DQREF(dq) (dq)->dq_cnt++ 142 #endif 143 144 #include <sys/cdefs.h> 145 146 struct dquot; 147 struct inode; 148 struct mount; 149 struct proc; 150 struct ucred; 151 struct ufsmount; 152 struct vnode; 153 __BEGIN_DECLS 154 int chkdq __P((struct inode *, long, struct ucred *, int)); 155 int chkdqchg __P((struct inode *, long, struct ucred *, int)); 156 int chkiq __P((struct inode *, long, struct ucred *, int)); 157 int chkiqchg __P((struct inode *, long, struct ucred *, int)); 158 void dqflush __P((struct vnode *)); 159 int dqget __P((struct vnode *, 160 u_long, struct ufsmount *, int, struct dquot **)); 161 void dqinit __P((void)); 162 void dqref __P((struct dquot *)); 163 void dqrele __P((struct vnode *, struct dquot *)); 164 int dqsync __P((struct vnode *, struct dquot *)); 165 int getinoquota __P((struct inode *)); 166 int getquota __P((struct mount *, u_long, int, caddr_t)); 167 int qsync __P((struct mount *mp)); 168 int quotaoff __P((struct proc *, struct mount *, int)); 169 int quotaon __P((struct proc *, struct mount *, int, caddr_t)); 170 int setquota __P((struct mount *, u_long, int, caddr_t)); 171 int setuse __P((struct mount *, u_long, int, caddr_t)); 172 int ufs_quotactl __P((struct mount *, int, uid_t, caddr_t, struct proc *)); 173 __END_DECLS 174 175 #ifdef DIAGNOSTIC 176 __BEGIN_DECLS 177 void chkdquot __P((struct inode *)); 178 __END_DECLS 179 #endif 180 181 #endif /* _QUOTA_ */ 182