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32 * @(#)quota.h 8.3 (Berkeley) 8/19/94
36 #ifndef _UFS_UFS_QUOTA_H_
37 #define _UFS_UFS_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 * ufsmount 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 ufsmount
97 u_int32_t dqb_bhardlimit; /* absolute limit on disk blks alloc */
98 u_int32_t dqb_bsoftlimit; /* preferred limit on disk blks */
99 u_int32_t dqb_curblocks; /* current block count */
100 u_int32_t dqb_ihardlimit; /* maximum # allocated inodes + 1 */
101 u_int32_t dqb_isoftlimit; /* preferred inode limit */
102 u_int32_t dqb_curinodes; /* current # allocated inodes */
103 int32_t dqb_btime; /* time limit for excessive disk use */
104 int32_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
116 * (h) protected by dqhlock
119 LIST_ENTRY(dquot) dq_hash; /* (h) hash list */
120 TAILQ_ENTRY(dquot) dq_freelist; /* (h) free list */
121 struct mtx dq_lock; /* lock for concurrency */
122 u_int16_t dq_flags; /* flags, see below */
123 u_int16_t dq_type; /* quota type of this dquot */
124 u_int32_t dq_cnt; /* (h) count of active references */
125 u_int32_t dq_id; /* identifier this applies to */
126 struct ufsmount *dq_ump; /* (h) filesystem that this is
128 struct 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 chkdq() and 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) dqref(dq)
170 #define DQREF(dq) (dq)->dq_cnt++
173 #define DQI_LOCK(dq) mtx_lock(&(dq)->dq_lock)
174 #define DQI_UNLOCK(dq) mtx_unlock(&(dq)->dq_lock)
176 #define DQI_WAIT(dq, prio, msg) do { \
177 while ((dq)->dq_flags & DQ_LOCK) { \
178 (dq)->dq_flags |= DQ_WANT; \
179 (void) msleep((dq), \
180 &(dq)->dq_lock, (prio), (msg), 0); \
184 #define DQI_WAKEUP(dq) do { \
185 if ((dq)->dq_flags & DQ_WANT) \
187 (dq)->dq_flags &= ~(DQ_WANT|DQ_LOCK); \
196 int chkdq(struct inode *, int64_t, struct ucred *, int);
197 int chkiq(struct inode *, int, struct ucred *, int);
199 void dqrele(struct vnode *, struct dquot *);
201 int getinoquota(struct inode *);
202 int getquota(struct thread *, struct mount *, u_long, int, void *);
203 int qsync(struct mount *mp);
204 int quotaoff(struct thread *td, struct mount *, int);
205 int quotaon(struct thread *td, struct mount *, int, void *);
206 int setquota(struct thread *, struct mount *, u_long, int, void *);
207 int setuse(struct thread *, struct mount *, u_long, int, void *);
208 vfs_quotactl_t ufs_quotactl;
212 #include <sys/cdefs.h>
215 int quotactl(const char *, int, int, void *);
220 #endif /* !_UFS_UFS_QUOTA_H_ */