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36 * @(#)quota.h 8.3 (Berkeley) 8/19/94
37 * $FreeBSD: src/sys/ufs/ufs/quota.h,v 1.15.2.1 2003/02/27 12:04:13 das Exp $
40 #ifndef _VFS_GNU_EXT2FS_QUOTA_H_
41 #define _VFS_GNU_EXT2FS_QUOTA_H_
44 * Definitions for disk quotas imposed on the average user
45 * (big brother finally hits UNIX).
47 * The following constants define the amount of time given a user before the
48 * soft limits are treated as hard limits (usually resulting in an allocation
49 * failure). The timer is started when the user crosses their soft limit, it
50 * is reset when they go below their soft limit.
52 #define MAX_IQ_TIME (7*24*60*60) /* seconds in 1 week */
53 #define MAX_DQ_TIME (7*24*60*60) /* seconds in 1 week */
56 * The following constants define the usage of the quota file array in the
57 * ext2mount structure and dquot array in the inode structure. The semantics
58 * of the elements of these arrays are defined in the routine getinoquota;
59 * the remainder of the quota code treats them generically and need not be
60 * inspected when changing the size of the array.
63 #define USRQUOTA 0 /* element used for user quotas */
64 #define GRPQUOTA 1 /* element used for group quotas */
67 * Definitions for the default names of the quotas files.
69 #define INITQFNAMES { \
70 "user", /* USRQUOTA */ \
71 "group", /* GRPQUOTA */ \
74 #define QUOTAFILENAME "quota"
75 #define QUOTAGROUP "operator"
78 * Command definitions for the 'quotactl' system call. The commands are
79 * broken into a main command defined below and a subcommand that is used
80 * to convey the type of quota that is being manipulated (see above).
82 #define SUBCMDMASK 0x00ff
84 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
86 #define Q_QUOTAON 0x0100 /* enable quotas */
87 #define Q_QUOTAOFF 0x0200 /* disable quotas */
88 #define Q_GETQUOTA 0x0300 /* get limits and usage */
89 #define Q_SETQUOTA 0x0400 /* set limits and usage */
90 #define Q_SETUSE 0x0500 /* set usage */
91 #define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
94 * The following structure defines the format of the disk quota file
95 * (as it appears on disk) - the file is an array of these structures
96 * indexed by user or group number. The setquota system call establishes
97 * the vnode for each quota file (a pointer is retained in the ext2mount
101 uint32_t dqb_bhardlimit; /* absolute limit on disk blks alloc */
102 uint32_t dqb_bsoftlimit; /* preferred limit on disk blks */
103 uint32_t dqb_curblocks; /* current block count */
104 uint32_t dqb_ihardlimit; /* maximum # allocated inodes + 1 */
105 uint32_t dqb_isoftlimit; /* preferred inode limit */
106 uint32_t dqb_curinodes; /* current # allocated inodes */
107 time_t dqb_btime; /* time limit for excessive disk use */
108 time_t dqb_itime; /* time limit for excessive files */
113 #include <sys/queue.h>
116 * The following structure records disk usage for a user or group on a
117 * filesystem. There is one allocated for each quota that exists on any
118 * filesystem for the current user or group. A cache is kept of recently
122 LIST_ENTRY(ext2_dquot) dq_hash; /* hash list */
123 TAILQ_ENTRY(ext2_dquot) dq_freelist; /* free list */
124 uint16_t dq_flags; /* flags, see below */
125 uint16_t dq_type; /* quota type of this dquot */
126 uint32_t dq_cnt; /* count of active references */
127 uint32_t dq_id; /* identifier this applies to */
128 struct ext2mount *dq_ump; /* filesystem that this is taken from */
129 struct ext2_dqblk dq_dqb; /* actual usage & quotas */
134 #define DQ_LOCK 0x01 /* this quota locked (no MODS) */
135 #define DQ_WANT 0x02 /* wakeup on unlock */
136 #define DQ_MOD 0x04 /* this quota modified since read */
137 #define DQ_FAKE 0x08 /* no limits here, just usage */
138 #define DQ_BLKS 0x10 /* has been warned about blk limit */
139 #define DQ_INODS 0x20 /* has been warned about inode limit */
141 * Shorthand notation.
143 #define dq_bhardlimit dq_dqb.dqb_bhardlimit
144 #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
145 #define dq_curblocks dq_dqb.dqb_curblocks
146 #define dq_ihardlimit dq_dqb.dqb_ihardlimit
147 #define dq_isoftlimit dq_dqb.dqb_isoftlimit
148 #define dq_curinodes dq_dqb.dqb_curinodes
149 #define dq_btime dq_dqb.dqb_btime
150 #define dq_itime dq_dqb.dqb_itime
153 * If the system has never checked for a quota for this file, then it is
154 * set to NODQUOT. Once a write attempt is made the inode pointer is set
155 * to reference a dquot structure.
160 * Flags to ext2_chkdq() and ext2_chkiq()
162 #define FORCE 0x01 /* force usage changes independent of limits */
163 #define CHOWN 0x02 /* (advisory) change initiated by chown */
166 * Macros to avoid subroutine calls to trivial functions.
169 #define DQREF(dq) ext2_dqref(dq)
171 #define DQREF(dq) (dq)->dq_cnt++
181 int ext2_chkdq(struct inode *, long, struct ucred *, int);
182 int ext2_chkiq(struct inode *, long, struct ucred *, int);
183 void ext2_dqinit(void);
184 void ext2_dqrele(struct vnode *, struct ext2_dquot *);
185 int ext2_getinoquota(struct inode *);
186 int ext2_getquota(struct mount *, u_long, int, caddr_t);
187 int ext2_qsync(struct mount *mp);
188 int ext2_quotaoff(struct mount *, int);
189 int ext2_quotaon(struct ucred *, struct mount *, int, caddr_t);
190 int ext2_setquota(struct mount *, u_long, int, caddr_t);
191 int ext2_setuse(struct mount *, u_long, int, caddr_t);
192 int ext2_quotactl(struct mount *, int, uid_t, caddr_t, struct ucred *);
196 #include <sys/cdefs.h>
199 int quotactl(const char *, int, int, void *);
204 #endif /* !_VFS_GNU_EXT2FS_QUOTA_H_ */