200 lines
7.0 KiB
C
Executable File
200 lines
7.0 KiB
C
Executable File
/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Robert Elz at The University of Melbourne.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Version: $Id: //BBN_Linux/Branch/Branch_for_Rel_CMCC_7526_20161014/tclinux_phoenix/bootrom/bootram/include/linux/quota.h#1 $
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*/
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#ifndef _LINUX_QUOTA_
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#define _LINUX_QUOTA_
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#include <linux/errno.h>
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/*
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* Convert diskblocks to blocks and the other way around.
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*/
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#define dbtob(num) (num << BLOCK_SIZE_BITS)
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#define btodb(num) (num >> BLOCK_SIZE_BITS)
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/*
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* Convert count of filesystem blocks to diskquota blocks, meant
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* for filesystems where i_blksize != BLOCK_SIZE
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*/
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#define fs_to_dq_blocks(num, blksize) (((num) * (blksize)) / BLOCK_SIZE)
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/*
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* Definitions for disk quotas imposed on the average user
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* (big brother finally hits Linux).
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*
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* The following constants define the amount of time given a user
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* before the soft limits are treated as hard limits (usually resulting
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* in an allocation failure). The timer is started when the user crosses
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* their soft limit, it is reset when they go below their soft limit.
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*/
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#define MAX_IQ_TIME 604800 /* (7*24*60*60) 1 week */
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#define MAX_DQ_TIME 604800 /* (7*24*60*60) 1 week */
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#define MAXQUOTAS 2
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#define USRQUOTA 0 /* element used for user quotas */
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#define GRPQUOTA 1 /* element used for group quotas */
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/*
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* Definitions for the default names of the quotas files.
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*/
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#define INITQFNAMES { \
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"user", /* USRQUOTA */ \
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"group", /* GRPQUOTA */ \
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"undefined", \
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};
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#define QUOTAFILENAME "quota"
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#define QUOTAGROUP "staff"
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/*
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* Command definitions for the 'quotactl' system call.
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* The commands are broken into a main command defined below
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* and a subcommand that is used to convey the type of
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* quota that is being manipulated (see above).
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*/
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#define SUBCMDMASK 0x00ff
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#define SUBCMDSHIFT 8
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#define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
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#define Q_QUOTAON 0x0100 /* enable quotas */
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#define Q_QUOTAOFF 0x0200 /* disable quotas */
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#define Q_GETQUOTA 0x0300 /* get limits and usage */
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#define Q_SETQUOTA 0x0400 /* set limits and usage */
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#define Q_SETUSE 0x0500 /* set usage */
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#define Q_SYNC 0x0600 /* sync disk copy of a filesystems quotas */
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#define Q_SETQLIM 0x0700 /* set limits */
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#define Q_GETSTATS 0x0800 /* get collected stats */
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#define Q_RSQUASH 0x1000 /* set root_squash option */
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/*
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* The following structure defines the format of the disk quota file
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* (as it appears on disk) - the file is an array of these structures
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* indexed by user or group number.
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*/
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struct dqblk {
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__u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */
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__u32 dqb_bsoftlimit; /* preferred limit on disk blks */
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__u32 dqb_curblocks; /* current block count */
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__u32 dqb_ihardlimit; /* absolute limit on allocated inodes */
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__u32 dqb_isoftlimit; /* preferred inode limit */
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__u32 dqb_curinodes; /* current # allocated inodes */
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time_t dqb_btime; /* time limit for excessive disk use */
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time_t dqb_itime; /* time limit for excessive inode use */
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};
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/*
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* Shorthand notation.
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*/
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#define dq_bhardlimit dq_dqb.dqb_bhardlimit
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#define dq_bsoftlimit dq_dqb.dqb_bsoftlimit
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#define dq_curblocks dq_dqb.dqb_curblocks
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#define dq_ihardlimit dq_dqb.dqb_ihardlimit
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#define dq_isoftlimit dq_dqb.dqb_isoftlimit
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#define dq_curinodes dq_dqb.dqb_curinodes
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#define dq_btime dq_dqb.dqb_btime
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#define dq_itime dq_dqb.dqb_itime
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#define dqoff(UID) ((loff_t)((UID) * sizeof (struct dqblk)))
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struct dqstats {
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__u32 lookups;
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__u32 drops;
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__u32 reads;
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__u32 writes;
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__u32 cache_hits;
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__u32 allocated_dquots;
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__u32 free_dquots;
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__u32 syncs;
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};
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#ifdef __KERNEL__
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extern int nr_dquots, nr_free_dquots;
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extern int dquot_root_squash;
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#define NR_DQHASH 43 /* Just an arbitrary number */
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#define DQ_LOCKED 0x01 /* dquot under IO */
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#define DQ_MOD 0x02 /* dquot modified since read */
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#define DQ_BLKS 0x10 /* uid/gid has been warned about blk limit */
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#define DQ_INODES 0x20 /* uid/gid has been warned about inode limit */
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#define DQ_FAKE 0x40 /* no limits only usage */
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#define DQ_INVAL 0x80 /* dquot is going to be invalidated */
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struct dquot {
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struct list_head dq_hash; /* Hash list in memory */
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struct list_head dq_inuse; /* List of all quotas */
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struct list_head dq_free; /* Free list element */
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wait_queue_head_t dq_wait_lock; /* Pointer to waitqueue on dquot lock */
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wait_queue_head_t dq_wait_free; /* Pointer to waitqueue for quota to be unused */
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int dq_count; /* Reference count */
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/* fields after this point are cleared when invalidating */
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struct super_block *dq_sb; /* superblock this applies to */
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unsigned int dq_id; /* ID this applies to (uid, gid) */
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kdev_t dq_dev; /* Device this applies to */
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short dq_type; /* Type of quota */
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short dq_flags; /* See DQ_* */
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unsigned long dq_referenced; /* Number of times this dquot was
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referenced during its lifetime */
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struct dqblk dq_dqb; /* Diskquota usage */
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};
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#define NODQUOT (struct dquot *)NULL
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/*
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* Flags used for set_dqblk.
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*/
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#define SET_QUOTA 0x02
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#define SET_USE 0x04
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#define SET_QLIMIT 0x08
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#define QUOTA_OK 0
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#define NO_QUOTA 1
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#else
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# /* nodep */ include <sys/cdefs.h>
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__BEGIN_DECLS
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long quotactl __P ((int, const char *, int, caddr_t));
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__END_DECLS
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#endif /* __KERNEL__ */
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#endif /* _QUOTA_ */
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