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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 $
36 #ifndef _VFS_GNU_EXT2FS_QUOTA_H_
37 #define _VFS_GNU_EXT2FS_QUOTA_H_
40 * Definitions for disk quotas imposed on the average user
41 * (big brother finally hits UNIX).
43 * The following constants define the amount of time given a user before the
44 * soft limits are treated as hard limits (usually resulting in an allocation
45 * failure). The timer is started when the user crosses their soft limit, it
46 * is reset when they go below their soft limit.
48 #define MAX_IQ_TIME (7*24*60*60) /* seconds in 1 week */
49 #define MAX_DQ_TIME (7*24*60*60) /* seconds in 1 week */
52 * The following constants define the usage of the quota file array in the
53 * ext2_mount structure and dquot array in the inode structure. The semantics
54 * of the elements of these arrays are defined in the routine getinoquota;
55 * the remainder of the quota code treats them generically and need not be
56 * inspected when changing the size of the array.
59 #define USRQUOTA 0 /* element used for user quotas */
60 #define GRPQUOTA 1 /* element used for group quotas */
63 * Definitions for the default names of the quotas files.
65 #define INITQFNAMES { \
66 "user", /* USRQUOTA */ \
67 "group", /* GRPQUOTA */ \
70 #define QUOTAFILENAME "quota"
71 #define QUOTAGROUP "operator"
74 * Command definitions for the 'quotactl' system call. The commands are
75 * broken into a main command defined below and a subcommand that is used
76 * to convey the type of quota that is being manipulated (see above).
78 #define SUBCMDMASK 0x00ff
80 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
82 #define Q_QUOTAON 0x0100 /* enable quotas */
83 #define Q_QUOTAOFF 0x0200 /* disable quotas */
84 #define Q_GETQUOTA 0x0300 /* get limits and usage */
85 #define Q_SETQUOTA 0x0400 /* set limits and usage */
86 #define Q_SETUSE 0x0500 /* set usage */
87 #define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
90 * The following structure defines the format of the disk quota file
91 * (as it appears on disk) - the file is an array of these structures
92 * indexed by user or group number. The setquota system call establishes
93 * the vnode for each quota file (a pointer is retained in the ext2_mount
97 uint32_t dqb_bhardlimit; /* absolute limit on disk blks alloc */
98 uint32_t dqb_bsoftlimit; /* preferred limit on disk blks */
99 uint32_t dqb_curblocks; /* current block count */
100 uint32_t dqb_ihardlimit; /* maximum # allocated inodes + 1 */
101 uint32_t dqb_isoftlimit; /* preferred inode limit */
102 uint32_t dqb_curinodes; /* current # allocated inodes */
103 time_t dqb_btime; /* time limit for excessive disk use */
104 time_t dqb_itime; /* time limit for excessive files */
109 #include <sys/queue.h>
112 * The following structure records disk usage for a user or group on a
113 * filesystem. There is one allocated for each quota that exists on any
114 * filesystem for the current user or group. A cache is kept of recently
118 LIST_ENTRY(ext2_dquot) dq_hash; /* hash list */
119 TAILQ_ENTRY(ext2_dquot) dq_freelist; /* free list */
120 uint16_t dq_flags; /* flags, see below */
121 uint16_t dq_type; /* quota type of this dquot */
122 uint32_t dq_cnt; /* count of active references */
123 uint32_t dq_id; /* identifier this applies to */
124 struct ext2_mount *dq_ump; /* filesystem that this is taken from */
125 struct ext2_dqblk dq_dqb; /* actual usage & quotas */
130 #define DQ_LOCK 0x01 /* this quota locked (no MODS) */
131 #define DQ_WANT 0x02 /* wakeup on unlock */
132 #define DQ_MOD 0x04 /* this quota modified since read */
133 #define DQ_FAKE 0x08 /* no limits here, just usage */
134 #define DQ_BLKS 0x10 /* has been warned about blk limit */
135 #define DQ_INODS 0x20 /* has been warned about inode limit */
137 * Shorthand notation.
139 #define dq_bhardlimit dq_dqb.dqb_bhardlimit
140 #define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
141 #define dq_curblocks dq_dqb.dqb_curblocks
142 #define dq_ihardlimit dq_dqb.dqb_ihardlimit
143 #define dq_isoftlimit dq_dqb.dqb_isoftlimit
144 #define dq_curinodes dq_dqb.dqb_curinodes
145 #define dq_btime dq_dqb.dqb_btime
146 #define dq_itime dq_dqb.dqb_itime
149 * If the system has never checked for a quota for this file, then it is
150 * set to NODQUOT. Once a write attempt is made the inode pointer is set
151 * to reference a dquot structure.
156 * Flags to ext2_chkdq() and ext2_chkiq()
158 #define FORCE 0x01 /* force usage changes independent of limits */
159 #define CHOWN 0x02 /* (advisory) change initiated by chown */
162 * Macros to avoid subroutine calls to trivial functions.
165 #define DQREF(dq) ext2_dqref(dq)
167 #define DQREF(dq) (dq)->dq_cnt++
177 int ext2_chkdq(struct inode *, long, struct ucred *, int);
178 int ext2_chkiq(struct inode *, long, struct ucred *, int);
179 void ext2_dqinit(void);
180 void ext2_dqrele(struct vnode *, struct ext2_dquot *);
181 int ext2_getinoquota(struct inode *);
182 int ext2_getquota(struct mount *, u_long, int, caddr_t);
183 int ext2_qsync(struct mount *mp);
184 int ext2_quotaoff(struct mount *, int);
185 int ext2_quotaon(struct ucred *, struct mount *, int, caddr_t);
186 int ext2_setquota(struct mount *, u_long, int, caddr_t);
187 int ext2_setuse(struct mount *, u_long, int, caddr_t);
188 int ext2_quotactl(struct mount *, int, uid_t, caddr_t, struct ucred *);
192 #include <sys/cdefs.h>
195 int quotactl(const char *, int, int, void *);
200 #endif /* !_VFS_GNU_EXT2FS_QUOTA_H_ */