208 lines
6.3 KiB
C
208 lines
6.3 KiB
C
/* @(#)91 1.8 src/bos/usr/include/jfs/quota.h, syspfs, bos41J, 9520B_all 5/19/95 09:09:25 */
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/*
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* COMPONENT_NAME: (SYSPFS) Physical File System
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*
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* FUNCTIONS: quota.h
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*
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* ORIGINS: 26, 27
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*
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* (C) COPYRIGHT International Business Machines Corp. 1988, 1995
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* All Rights Reserved
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* Licensed Materials - Property of IBM
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*
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* US Government Users Restricted Rights - Use, duplication or
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* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
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*/
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#ifndef _H_JFS_QUOTA
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#define _H_JFS_QUOTA
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/vmuser.h>
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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 UNIX).
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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 (7*24*60*60) /* 1 week */
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#define MAX_DQ_TIME (7*24*60*60) /* 1 week */
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/*
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* The following constants define the usage of the quota file array
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* in the jfsmount structure and dquot array in the inode structure.
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* The semantics of the elements of these arrays are defined in the
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* routine getinoquota; the remainder of the quota code treats them
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* generically and need not be inspected when changing the size of
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* the array.
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*/
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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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/* Range of valid disk quota ids is MINDQID - MAXDQID
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*/
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#define MINDQID 0
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#define MAXDQID ((MAXFSIZE / sizeof (struct dqblk)) - 1)
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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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#ifndef _KERNEL
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/* Declarations for libc quota file stuff.
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*/
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extern char *qfname;
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extern char *qfextension[];
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extern char *quotagroup;
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#endif /* _KERNEL */
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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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/*
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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. The quotactl system call establishes
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* the vnode for each quota file (a pointer is retained in the jfsmount
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* structure).
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*/
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struct dqblk {
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u_long dqb_bhardlimit; /* absolute limit on disk blks alloc */
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u_long dqb_bsoftlimit; /* preferred limit on disk blks */
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u_long dqb_curblocks; /* current block count */
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u_long dqb_ihardlimit; /* maximum # allocated inodes + 1 */
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u_long dqb_isoftlimit; /* preferred inode limit */
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u_long 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 files */
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};
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/* disk quota data block size.
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*/
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#define DQBSIZE 1024
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/* miscellanous defines for dealing with partial blocks.
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*/
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#define DQCBIT 0x80000000
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#define DQCARRY(c) ((uint)(c) >> 31)
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#define DQBTIME(t) ((uint)(t) & (~DQCBIT))
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#define DQSBTIME(c,t) (((uint)(c) << 31) | ((uint)(t) & (~DQCBIT)))
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#ifdef _KERNEL
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#include <jfs/jfsmount.h>
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#include <jfs/fsparam.h>
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/*
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* The following structure records disk usage for a user or group on a
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* filesystem. There is one allocated for each quota that exists on any
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* filesystem for the current user or group. A cache is kept of recently
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* used entries.
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*/
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struct dquot {
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struct dquot *dq_forw; /* hash chain forward */
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struct dquot *dq_back; /* hash chain backword */
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struct dquot *dq_next; /* next on cache list */
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struct dquot *dq_prev; /* previous on cache list */
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int dq_lock; /* VMM bit lock */
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short dq_flags; /* flags, see below */
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short dq_type; /* quota type of this dquot */
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ulong dq_cnt; /* count of active references */
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uid_t dq_id; /* identifier this applies to */
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dev_t dq_dev; /* filesystem that this is taken from*/
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struct jfsmount *dq_jmp; /* mount structure pointer */
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struct dqblk dq_dqb; /* actual usage & quotas */
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int dq_event; /* event list for quota activity */
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};
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/*
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* dq_lock bits used by v_dqlock() and v_dqunlock()
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*/
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#define DQ_LOCK 0x01 /* this quota locked (no MODS) */
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#define DQ_WANT 0x02 /* wakeup on unlock */
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/*
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* dq_flag values
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*/
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#define DQ_MOD 0x04 /* this quota modified since read */
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#define DQ_FAKE 0x08 /* no limits here, just usage */
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#define DQ_BLKS 0x10 /* has been warned about blk limit */
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#define DQ_INODS 0x20 /* has been warned about inode limit */
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#define DQ_QFLOCK 0x40 /* this quota is transforming */
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#define DQ_QFWANT 0x80 /* wakeup on transform complete */
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#define DQ_IOERROR 0x100 /* error reading this quota */
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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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/*
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* If the system has never checked for a quota for this file,
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* then it is set to NODQUOT. Once a write attempt is made
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* the inode pointer is set to reference a dquot structure.
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*/
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#define NODQUOT ((struct dquot *) 0)
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#define JFSTODQ(BLKS) ((BLKS) * (BSIZE/DQBSIZE))
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/*
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* Hash anchors for dquot table.
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*/
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struct hdquot {
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struct dquot *dqh_forw;
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struct dquot *dqh_back;
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};
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/*
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* Hash table size and marco for hash function.
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*/
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# define NHDQUOT PAGESIZE/sizeof (struct hdquot)
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# define DQHASH(DEV,ID) \
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(&hdquot[(((int)((DEV))) + ((int)((ID)))) & (NHDQUOT-1)])
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/* valid disk quota id.
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*/
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# define DQVALID(ID) \
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(((int)((ID))) >= MINDQID && ((int)((ID))) <= MAXDQID ? 1 : 0)
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#endif /* _KERNEL */
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#endif /* _H_JFS_QUOTA */
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