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32 * @(#)quota.h 8.3 (Berkeley) 8/19/94
33 * $FreeBSD: src/sys/ufs/ufs/quota.h,v 1.15.2.1 2003/02/27 12:04:13 das Exp $
34 * $DragonFly: src/sys/vfs/ufs/quota.h,v 1.10 2008/08/04 18:15:47 dillon Exp $
37 #ifndef _VFS_UFS_QUOTA_H_
38 #define _VFS_UFS_QUOTA_H_
40 #include "ufs_types.h"
43 * Definitions for disk quotas imposed on the average user
44 * (big brother finally hits UNIX).
46 * The following constants define the amount of time given a user before the
47 * soft limits are treated as hard limits (usually resulting in an allocation
48 * failure). The timer is started when the user crosses their soft limit, it
49 * is reset when they go below their soft limit.
51 #define MAX_IQ_TIME (7*24*60*60) /* seconds in 1 week */
52 #define MAX_DQ_TIME (7*24*60*60) /* seconds in 1 week */
55 * The following constants define the usage of the quota file array in the
56 * ufsmount structure and dquot array in the inode structure. The semantics
57 * of the elements of these arrays are defined in the routine getinoquota;
58 * the remainder of the quota code treats them generically and need not be
59 * inspected when changing the size of the array.
62 #define USRQUOTA 0 /* element used for user quotas */
63 #define GRPQUOTA 1 /* element used for group quotas */
66 * Definitions for the default names of the quotas files.
68 #define INITQFNAMES { \
69 "user", /* USRQUOTA */ \
70 "group", /* GRPQUOTA */ \
73 #define QUOTAFILENAME "quota"
74 #define QUOTAGROUP "operator"
77 * Command definitions for the 'quotactl' system call. The commands are
78 * broken into a main command defined below and a subcommand that is used
79 * to convey the type of quota that is being manipulated (see above).
81 #define SUBCMDMASK 0x00ff
83 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
85 #define Q_QUOTAON 0x0100 /* enable quotas */
86 #define Q_QUOTAOFF 0x0200 /* disable quotas */
87 #define Q_GETQUOTA 0x0300 /* get limits and usage */
88 #define Q_SETQUOTA 0x0400 /* set limits and usage */
89 #define Q_SETUSE 0x0500 /* set usage */
90 #define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
93 * The following structure defines the format of the disk quota file
94 * (as it appears on disk) - the file is an array of these structures
95 * indexed by user or group number. The setquota system call establishes
96 * the vnode for each quota file (a pointer is retained in the ufsmount
100 uint32_t dqb_bhardlimit; /* absolute limit on disk blks alloc */
101 uint32_t dqb_bsoftlimit; /* preferred limit on disk blks */
102 uint32_t dqb_curblocks; /* current block count */
103 uint32_t dqb_ihardlimit; /* maximum # allocated inodes + 1 */
104 uint32_t dqb_isoftlimit; /* preferred inode limit */
105 uint32_t dqb_curinodes; /* current # allocated inodes */
106 ufs_time_t dqb_btime; /* time limit for excessive disk use */
107 ufs_time_t dqb_itime; /* time limit for excessive files */
112 #include <sys/queue.h>
115 * The following structure records disk usage for a user or group on a
116 * filesystem. There is one allocated for each quota that exists on any
117 * filesystem for the current user or group. A cache is kept of recently
121 LIST_ENTRY(ufs_dquot) dq_hash; /* hash list */
122 TAILQ_ENTRY(ufs_dquot) dq_freelist; /* free list */
123 uint16_t dq_flags; /* flags, see below */
124 uint16_t dq_type; /* quota type of this dquot */
125 uint32_t dq_cnt; /* count of active references */
126 uint32_t dq_id; /* identifier this applies to */
127 struct ufsmount *dq_ump; /* filesystem that this is taken from */
128 struct ufs_dqblk dq_dqb; /* actual usage & quotas */
133 #define DQ_LOCK 0x01 /* this quota locked (no MODS) */
134 #define DQ_WANT 0x02 /* wakeup on unlock */
135 #define DQ_MOD 0x04 /* this quota modified since read */
136 #define DQ_FAKE 0x08 /* no limits here, just usage */
137 #define DQ_BLKS 0x10 /* has been warned about blk limit */
138 #define DQ_INODS 0x20 /* has been warned about inode limit */
140 * Shorthand notation.
142 #define dq_bhardlimit dq_dqb.dqb_bhardlimit
143 #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
144 #define dq_curblocks dq_dqb.dqb_curblocks
145 #define dq_ihardlimit dq_dqb.dqb_ihardlimit
146 #define dq_isoftlimit dq_dqb.dqb_isoftlimit
147 #define dq_curinodes dq_dqb.dqb_curinodes
148 #define dq_btime dq_dqb.dqb_btime
149 #define dq_itime dq_dqb.dqb_itime
152 * If the system has never checked for a quota for this file, then it is
153 * set to NODQUOT. Once a write attempt is made the inode pointer is set
154 * to reference a dquot structure.
159 * Flags to ufs_chkdq() and ufs_chkiq()
161 #define FORCE 0x01 /* force usage changes independent of limits */
162 #define CHOWN 0x02 /* (advisory) change initiated by chown */
165 * Macros to avoid subroutine calls to trivial functions.
168 #define DQREF(dq) ufs_dqref(dq)
170 #define DQREF(dq) (dq)->dq_cnt++
180 int ufs_chkdq(struct inode *, long, struct ucred *, int);
181 int ufs_chkiq(struct inode *, long, struct ucred *, int);
182 void ufs_dqinit(void);
183 void ufs_dqrele(struct vnode *, struct ufs_dquot *);
184 int ufs_getinoquota(struct inode *);
185 int ufs_getquota(struct mount *, u_long, int, caddr_t);
186 int ufs_qsync(struct mount *mp);
187 int ufs_quotaoff(struct mount *, int);
188 int ufs_quotaon(struct ucred *, struct mount *, int, caddr_t);
189 int ufs_setquota(struct mount *, u_long, int, caddr_t);
190 int ufs_setuse(struct mount *, u_long, int, caddr_t);
191 int ufs_quotactl(struct mount *, int, uid_t, caddr_t, struct ucred *);
195 #include <sys/cdefs.h>
198 int quotactl(const char *, int, int, void *);
203 #endif /* !_VFS_UFS_QUOTA_H_ */