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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 1.1 2005-12-20 11:32:25 jcastillo Exp $

 */

#ifndef _LINUX_QUOTA_

#define _LINUX_QUOTA_

#include <linux/errno.h>

/*

 * Convert diskblocks to blocks and the other way around.

 * currently only to fool the BSD source. :-)

 */

#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"

#define NR_DQHASH 43            /* Just an arbitrary number any suggestions ? */

#define NR_DQUOTS 256           /* Number of quotas active at one time */

/*

 * 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 */

/*

 * 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;       /* maximum # 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 files */

};

/*

 * 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)      ((off_t)((UID) * sizeof (struct dqblk)))

struct dqstats {

   __u32 lookups;

   __u32 drops;

   __u32 reads;

   __u32 writes;

   __u32 cache_hits;

   __u32 pages_allocated;

   __u32 allocated_dquots;

   __u32 free_dquots;

   __u32 syncs;

};

#ifdef __KERNEL__

#include <linux/mount.h>

/*

 * 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 {

   unsigned int dq_id;          /* id this applies to (uid, gid) */

   short dq_type;               /* type of quota */

   kdev_t dq_dev;                /* Device this applies to */

   short dq_flags;              /* see DQ_* */

   short dq_count;              /* reference count */

   short dq_locknest;           /* lock nesting */

   struct task_struct *dq_lockproc;     /* process holding the lock */

   struct vfsmount *dq_mnt;     /* vfsmountpoint this applies to */

   struct dqblk dq_dqb;         /* diskquota usage */

   struct wait_queue *dq_wait;  /* pointer to waitqueue */

   struct dquot *dq_prev;       /* pointer to prev dquot */

   struct dquot *dq_next;       /* pointer to next dquot */

   struct dquot *dq_hash_prev;  /* pointer to prev dquot */

   struct dquot *dq_hash_next;  /* pointer to next dquot */

};

#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

/*

 * declaration of quota_function calls in kernel.

 */

extern void dquot_initialize(struct inode *inode, short type);

extern void dquot_drop(struct inode *inode);

extern int dquot_alloc_block(const struct inode *inode, unsigned long number);

extern int dquot_alloc_inode(const struct inode *inode, unsigned long number);

extern void dquot_free_block(const struct inode *inode, unsigned long number);

extern void dquot_free_inode(const struct inode *inode, unsigned long number);

extern int dquot_transfer(struct inode *inode, struct iattr *iattr, char direction);

extern void invalidate_dquots(kdev_t dev, short type);

extern int quota_off(kdev_t dev, short type);

extern int sync_dquots(kdev_t dev, short type);

#else

#include <sys/cdefs.h>

__BEGIN_DECLS

int quotactl __P ((int, const char *, int, caddr_t));

__END_DECLS

#endif /* __KERNEL__ */

#endif /* _QUOTA_ */