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/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Robert Elz at The University of Melbourne.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Version: $Id: quota.h,v 2.0 1996/11/17 16:48:14 mvw Exp mvw $
*/
#ifndef _LINUX_QUOTA_
#define _LINUX_QUOTA_
#include <linux/errno.h>
/*
* Convert diskblocks to blocks and the other way around.
*/
#define dbtob(num) (num << 10)
#define btodb(num) (num >> 10)
/*
* Convert count of filesystem blocks to diskquota blocks, meant
* for filesystems where i_blksize != BLOCK_SIZE
*/
#define fs_to_dq_blocks(num, blksize) (((num) * (blksize)) / BLOCK_SIZE)
/*
* Definitions for disk quotas imposed on the average user
* (big brother finally hits Linux).
*
* The following constants define the amount of time given a user
* before the soft limits are treated as hard limits (usually resulting
* in an allocation failure). The timer is started when the user crosses
* their soft limit, it is reset when they go below their soft limit.
*/
#define MAX_IQ_TIME 604800 /* (7*24*60*60) 1 week */
#define MAX_DQ_TIME 604800 /* (7*24*60*60) 1 week */
#define MAXQUOTAS 2
#define USRQUOTA 0 /* element used for user quotas */
#define GRPQUOTA 1 /* element used for group quotas */
/*
* Definitions for the default names of the quotas files.
*/
#define INITQFNAMES { \
"user", /* USRQUOTA */ \
"group", /* GRPQUOTA */ \
"undefined", \
};
#define QUOTAFILENAME "quota"
#define QUOTAGROUP "staff"
extern int nr_dquots, nr_free_dquots;
extern int max_dquots;
extern int dquot_root_squash;
#define NR_DQHASH 43 /* Just an arbitrary number */
#define NR_DQUOTS 1024 /* Maximum number of quotas active at one time (Configurable from /proc/sys/fs) */
/*
* Command definitions for the 'quotactl' system call.
* The commands are broken into a main command defined below
* and a subcommand that is used to convey the type of
* quota that is being manipulated (see above).
*/
#define SUBCMDMASK 0x00ff
#define SUBCMDSHIFT 8
#define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
#define Q_QUOTAON 0x0100 /* enable quotas */
#define Q_QUOTAOFF 0x0200 /* disable quotas */
#define Q_GETQUOTA 0x0300 /* get limits and usage */
#define Q_SETQUOTA 0x0400 /* set limits and usage */
#define Q_SETUSE 0x0500 /* set usage */
#define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
#define Q_SETQLIM 0x0700 /* set limits */
#define Q_GETSTATS 0x0800 /* get collected stats */
#define Q_RSQUASH 0x1000 /* set root_squash option */
/*
* The following structure defines the format of the disk quota file
* (as it appears on disk) - the file is an array of these structures
* indexed by user or group number.
*/
struct dqblk {
__u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */
__u32 dqb_bsoftlimit; /* preferred limit on disk blks */
__u32 dqb_curblocks; /* current block count */
__u32 dqb_ihardlimit; /* absolute limit on allocated inodes */
__u32 dqb_isoftlimit; /* preferred inode limit */
__u32 dqb_curinodes; /* current # allocated inodes */
time_t dqb_btime; /* time limit for excessive disk use */
time_t dqb_itime; /* time limit for excessive inode use */
};
/*
* Shorthand notation.
*/
#define dq_bhardlimit dq_dqb.dqb_bhardlimit
#define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
#define dq_curblocks dq_dqb.dqb_curblocks
#define dq_ihardlimit dq_dqb.dqb_ihardlimit
#define dq_isoftlimit dq_dqb.dqb_isoftlimit
#define dq_curinodes dq_dqb.dqb_curinodes
#define dq_btime dq_dqb.dqb_btime
#define dq_itime dq_dqb.dqb_itime
#define dqoff(UID) ((loff_t)((UID) * sizeof (struct dqblk)))
struct dqstats {
__u32 lookups;
__u32 drops;
__u32 reads;
__u32 writes;
__u32 cache_hits;
__u32 allocated_dquots;
__u32 free_dquots;
__u32 syncs;
};
#ifdef __KERNEL__
/*
* Maximum length of a message generated in the quota system,
* that needs to be kicked onto the tty.
*/
#define MAX_QUOTA_MESSAGE 75
#define DQ_LOCKED 0x01 /* locked for update */
#define DQ_WANT 0x02 /* wanted for update */
#define DQ_MOD 0x04 /* dquot modified since read */
#define DQ_BLKS 0x10 /* uid/gid has been warned about blk limit */
#define DQ_INODES 0x20 /* uid/gid has been warned about inode limit */
#define DQ_FAKE 0x40 /* no limits only usage */
struct dquot {
struct dquot *dq_next; /* Pointer to next dquot */
struct dquot **dq_pprev;
struct list_head dq_free; /* free list element */
struct dquot *dq_hash_next; /* Pointer to next in dquot_hash */
struct dquot **dq_hash_pprev; /* Pointer to previous in dquot_hash */
wait_queue_head_t dq_wait; /* Pointer to waitqueue */
int dq_count; /* Reference count */
/* fields after this point are cleared when invalidating */
struct vfsmount *dq_mnt; /* VFS_mount_point this applies to */
unsigned int dq_id; /* ID this applies to (uid, gid) */
kdev_t dq_dev; /* Device this applies to */
short dq_type; /* Type of quota */
short dq_flags; /* See DQ_* */
unsigned long dq_referenced; /* Number of times this dquot was
referenced during its lifetime */
struct dqblk dq_dqb; /* Diskquota usage */
};
#define NODQUOT (struct dquot *)NULL
/*
* Flags used for set_dqblk.
*/
#define QUOTA_SYSCALL 0x01
#define SET_QUOTA 0x02
#define SET_USE 0x04
#define SET_QLIMIT 0x08
#define QUOTA_OK 0
#define NO_QUOTA 1
#else
# /* nodep */ include <sys/cdefs.h>
__BEGIN_DECLS
int quotactl __P ((int, const char *, int, caddr_t));
__END_DECLS
#endif /* __KERNEL__ */
#endif /* _QUOTA_ */
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