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32 * @(#)quota.h 8.3 (Berkeley) 8/19/94
33 * %FreeBSD: src/sys/ufs/ufs/quota.h,v 1.15 1999/12/29 04:55:05 peter Exp %
37 #ifndef _UFS_UFS_QUOTA_H_
38 #define _UFS_UFS_QUOTA_H_
41 * Definitions for disk quotas imposed on the average user
42 * (big brother finally hits UNIX).
44 * The following constants define the amount of time given a user before the
45 * soft limits are treated as hard limits (usually resulting in an allocation
46 * failure). The timer is started when the user crosses their soft limit, it
47 * is reset when they go below their soft limit.
49 #define MAX_IQ_TIME (7*24*60*60) /* seconds in 1 week */
50 #define MAX_DQ_TIME (7*24*60*60) /* seconds in 1 week */
53 * The following constants define the usage of the quota file array in the
54 * ufsmount structure and dquot array in the inode structure. The semantics
55 * of the elements of these arrays are defined in the routine getinoquota;
56 * the remainder of the quota code treats them generically and need not be
57 * inspected when changing the size of the array.
60 #define USRQUOTA 0 /* element used for user quotas */
61 #define GRPQUOTA 1 /* element used for group quotas */
64 * Definitions for the default names of the quotas files.
66 #define INITQFNAMES { \
67 "user", /* USRQUOTA */ \
68 "group", /* GRPQUOTA */ \
71 #define QUOTAFILENAME "quota"
72 #define QUOTAGROUP "operator"
75 * Command definitions for the 'quotactl' system call. The commands are
76 * broken into a main command defined below and a subcommand that is used
77 * to convey the type of quota that is being manipulated (see above).
79 #define SUBCMDMASK 0x00ff
81 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
83 #define Q_QUOTAON 0x0100 /* enable quotas */
84 #define Q_QUOTAOFF 0x0200 /* disable quotas */
85 #define Q_GETQUOTA 0x0300 /* get limits and usage */
86 #define Q_SETQUOTA 0x0400 /* set limits and usage */
87 #define Q_SETUSE 0x0500 /* set usage */
88 #define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
91 * The following structure defines the format of the disk quota file
92 * (as it appears on disk) - the file is an array of these structures
93 * indexed by user or group number. The setquota system call establishes
94 * the vnode for each quota file (a pointer is retained in the ufsmount
98 u_int32_t dqb_bhardlimit; /* absolute limit on disk blks alloc */
99 u_int32_t dqb_bsoftlimit; /* preferred limit on disk blks */
100 u_int32_t dqb_curblocks; /* current block count */
101 u_int32_t dqb_ihardlimit; /* maximum # allocated inodes + 1 */
102 u_int32_t dqb_isoftlimit; /* preferred inode limit */
103 u_int32_t dqb_curinodes; /* current # allocated inodes */
104 time_t dqb_btime; /* time limit for excessive disk use */
105 time_t dqb_itime; /* time limit for excessive files */
110 #include <sys/queue.h>
113 * The following structure records disk usage for a user or group on a
114 * filesystem. There is one allocated for each quota that exists on any
115 * filesystem for the current user or group. A cache is kept of recently
119 LIST_ENTRY(dquot) dq_hash; /* hash list */
120 TAILQ_ENTRY(dquot) dq_freelist; /* free list */
121 u_int16_t dq_flags; /* flags, see below */
122 u_int16_t dq_cnt; /* count of active references */
123 u_int16_t dq_spare; /* unused spare padding */
124 u_int16_t dq_type; /* quota type of this dquot */
125 u_int32_t dq_id; /* identifier this applies to */
126 struct ufsmount *dq_ump; /* filesystem that this is taken from */
127 struct dqblk dq_dqb; /* actual usage & quotas */
132 #define DQ_LOCK 0x01 /* this quota locked (no MODS) */
133 #define DQ_WANT 0x02 /* wakeup on unlock */
134 #define DQ_MOD 0x04 /* this quota modified since read */
135 #define DQ_FAKE 0x08 /* no limits here, just usage */
136 #define DQ_BLKS 0x10 /* has been warned about blk limit */
137 #define DQ_INODS 0x20 /* has been warned about inode limit */
139 * Shorthand notation.
141 #define dq_bhardlimit dq_dqb.dqb_bhardlimit
142 #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
143 #define dq_curblocks dq_dqb.dqb_curblocks
144 #define dq_ihardlimit dq_dqb.dqb_ihardlimit
145 #define dq_isoftlimit dq_dqb.dqb_isoftlimit
146 #define dq_curinodes dq_dqb.dqb_curinodes
147 #define dq_btime dq_dqb.dqb_btime
148 #define dq_itime dq_dqb.dqb_itime
151 * If the system has never checked for a quota for this file, then it is
152 * set to NODQUOT. Once a write attempt is made the inode pointer is set
153 * to reference a dquot structure.
158 * Flags to chkdq() and chkiq()
160 #define FORCE 0x01 /* force usage changes independent of limits */
161 #define CHOWN 0x02 /* (advisory) change initiated by chown */
164 * Macros to avoid subroutine calls to trivial functions.
167 #define DQREF(dq) dqref(dq)
169 #define DQREF(dq) (dq)->dq_cnt++
178 int chkdq __P((struct inode *, long, struct ucred *, int));
179 int chkiq __P((struct inode *, long, struct ucred *, int));
180 void dqinit __P((void));
181 void dqrele __P((struct vnode *, struct dquot *));
182 int getinoquota __P((struct inode *));
183 int getquota __P((struct mount *, u_long, int, caddr_t));
184 int qsync __P((struct mount *mp));
185 int quotaoff __P((struct proc *, struct mount *, int));
186 int quotaon __P((struct proc *, struct mount *, int, caddr_t));
187 int setquota __P((struct mount *, u_long, int, caddr_t));
188 int setuse __P((struct mount *, u_long, int, caddr_t));
189 int ufs_quotactl __P((struct mount *, int, uid_t, caddr_t, struct proc *));
193 #include <sys/cdefs.h>
196 int quotactl __P((const char *, int, int, void *));
201 #endif /* !_UFS_UFS_QUOTA_H_ */