/* * 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 1.1.1.1 2003/06/23 22:18:43 jharrell Exp $ */ #ifndef _LINUX_QUOTA_ #define _LINUX_QUOTA_ #include /* * 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 __BEGIN_DECLS long quotactl __P ((int, const char *, int, caddr_t)); __END_DECLS #endif /* __KERNEL__ */ #endif /* _QUOTA_ */