Attachment 320 Details for Bug 879 – quota.h file from kernel 2.4.20

quota.h file from kernel 2.4.20

quota.h (text/plain), 6.93 KB, created by Ronan SALMON on 2003-12-12 04:51:50 UTC

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Creator: Ronan SALMON

Created: 2003-12-12 04:51:50 UTC

Size: 6.93 KB

patch

obsolete

>/*
> * 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 << BLOCK_SIZE_BITS)
>#define btodb(num) (num >> BLOCK_SIZE_BITS)
>
>/*
> * 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"
>
>/*
> * 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__
>
>extern int nr_dquots, nr_free_dquots;
>extern int dquot_root_squash;
>
>#define NR_DQHASH 43            /* Just an arbitrary number */
>
>#define DQ_LOCKED     0x01	/* dquot under IO */
>#define DQ_MOD        0x02	/* 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 */
>#define DQ_INVAL      0x80	/* dquot is going to be invalidated */
>
>struct dquot {
>	struct list_head dq_hash;	/* Hash list in memory */
>	struct list_head dq_inuse;	/* List of all quotas */
>	struct list_head dq_free;	/* Free list element */
>	wait_queue_head_t dq_wait_lock;	/* Pointer to waitqueue on dquot lock */
>	wait_queue_head_t dq_wait_free;	/* Pointer to waitqueue for quota to be unused */
>	int dq_count;			/* Reference count */
>
>	/* fields after this point are cleared when invalidating */
>	struct super_block *dq_sb;	/* superblock 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 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
>long quotactl __P ((int, const char *, int, caddr_t));
>__END_DECLS
>
>#endif /* __KERNEL__ */
>#endif /* _QUOTA_ */

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