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+/*
+ * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef _QUOTAIO_XFS_H
+#define _QUOTAIO_XFS_H
+
+#include <linux/types.h>
+
+#define XQM_CMD(cmd)	( ('X'<<8)+(cmd) )
+#define IS_XQM_CMD(cmd)	( ((int)(cmd)>>8) == 'X' )
+
+/*
+ * Disk quota - quotactl(2) commands for XFS Quota Manager (XQM).
+ */
+#define Q_XQUOTAON   XQM_CMD(0x1)	/* enable quota accounting/enforcement */
+#define Q_XQUOTAOFF  XQM_CMD(0x2)	/* disable quota accounting/enforcement */
+#define Q_XGETQUOTA  XQM_CMD(0x3)	/* get disk limits & usage */
+#define Q_XSETQLIM   XQM_CMD(0x4)	/* set disk limits only */
+#define Q_XGETQSTAT  XQM_CMD(0x5)	/* returns fs_quota_stat_t struct */
+#define Q_XQUOTARM   XQM_CMD(0x6)	/* free quota files' space */
+
+/*
+ * fs_disk_quota structure:
+ *
+ * This contains the current quota information regarding a user/proj/group.
+ * It is 64-bit aligned, and all the blk units are in BBs (Basic Blocks) of
+ * 512 bytes.
+ */
+#define FS_DQUOT_VERSION	1	/* fs_disk_quota.d_version */
+typedef struct fs_disk_quota {
+	__s8 d_version;		/* version of this structure */
+	__s8 d_flags;		/* XFS_{USER,PROJ,GROUP}_QUOTA */
+	__u16 d_fieldmask;	/* field specifier */
+	__u32 d_id;		/* user, project, or group ID */
+	__u64 d_blk_hardlimit;	/* absolute limit on disk blks */
+	__u64 d_blk_softlimit;	/* preferred limit on disk blks */
+	__u64 d_ino_hardlimit;	/* maximum # allocated inodes */
+	__u64 d_ino_softlimit;	/* preferred inode limit */
+	__u64 d_bcount;		/* # disk blocks owned by the user */
+	__u64 d_icount;		/* # inodes owned by the user */
+	__s32 d_itimer;		/* zero if within inode limits */
+	/* if not, we refuse service */
+	__s32 d_btimer;		/* similar to above; for disk blocks */
+	__u16 d_iwarns;		/* # warnings issued wrt num inodes */
+	__u16 d_bwarns;		/* # warnings issued wrt disk blocks */
+	__s32 d_padding2;	/* padding2 - for future use */
+	__u64 d_rtb_hardlimit;	/* absolute limit on realtime blks */
+	__u64 d_rtb_softlimit;	/* preferred limit on RT disk blks */
+	__u64 d_rtbcount;	/* # realtime blocks owned */
+	__s32 d_rtbtimer;	/* similar to above; for RT disk blks */
+	__u16 d_rtbwarns;	/* # warnings issued wrt RT disk blks */
+	__s16 d_padding3;	/* padding3 - for future use */
+	char d_padding4[8];	/* yet more padding */
+} fs_disk_quota_t;
+
+/*
+ * These fields are sent to Q_XSETQLIM to specify fields that need to change.
+ */
+#define FS_DQ_ISOFT	(1<<0)
+#define FS_DQ_IHARD	(1<<1)
+#define FS_DQ_BSOFT	(1<<2)
+#define FS_DQ_BHARD 	(1<<3)
+#define FS_DQ_RTBSOFT	(1<<4)
+#define FS_DQ_RTBHARD	(1<<5)
+#define FS_DQ_LIMIT_MASK	(FS_DQ_ISOFT | FS_DQ_IHARD | FS_DQ_BSOFT | \
+				 FS_DQ_BHARD | FS_DQ_RTBSOFT | FS_DQ_RTBHARD)
+/*
+ * These timers can only be set in super user's dquot. For others, timers are
+ * automatically started and stopped. Superusers timer values set the limits
+ * for the rest.  In case these values are zero, the DQ_{F,B}TIMELIMIT values
+ * defined below are used. 
+ * These values also apply only to the d_fieldmask field for Q_XSETQLIM.
+ */
+#define FS_DQ_BTIMER	(1<<6)
+#define FS_DQ_ITIMER	(1<<7)
+#define FS_DQ_RTBTIMER 	(1<<8)
+#define FS_DQ_TIMER_MASK	(FS_DQ_BTIMER | FS_DQ_ITIMER | FS_DQ_RTBTIMER)
+
+/*
+ * The following constants define the default amount of time given a user
+ * before the soft limits are treated as hard limits (usually resulting
+ * in an allocation failure).  These may be modified by the quotactl(2)
+ * system call with the Q_XSETQLIM command.
+ */
+#define	DQ_FTIMELIMIT	(7 * 24*60*60)	/* 1 week */
+#define	DQ_BTIMELIMIT	(7 * 24*60*60)	/* 1 week */
+
+/*
+ * Various flags related to quotactl(2).  Only relevant to XFS filesystems.
+ */
+#define XFS_QUOTA_UDQ_ACCT	(1<<0)	/* user quota accounting */
+#define XFS_QUOTA_UDQ_ENFD	(1<<1)	/* user quota limits enforcement */
+#define XFS_QUOTA_GDQ_ACCT	(1<<2)	/* group quota accounting */
+#define XFS_QUOTA_GDQ_ENFD	(1<<3)	/* group quota limits enforcement */
+
+#define XFS_USER_QUOTA		(1<<0)	/* user quota type */
+#define XFS_PROJ_QUOTA		(1<<1)	/* (IRIX) project quota type */
+#define XFS_GROUP_QUOTA		(1<<2)	/* group quota type */
+
+/*
+ * fs_quota_stat is the struct returned in Q_XGETQSTAT for a given file system.
+ * Provides a centralized way to get meta infomation about the quota subsystem.
+ * eg. space taken up for user and group quotas, number of dquots currently
+ * incore.
+ */
+#define FS_QSTAT_VERSION	1	/* fs_quota_stat.qs_version */
+
+/*
+ * Some basic infomation about 'quota files'.
+ */
+typedef struct fs_qfilestat {
+	__u64 qfs_ino;		/* inode number */
+	__u64 qfs_nblks;	/* number of BBs 512-byte-blks */
+	__u32 qfs_nextents;	/* number of extents */
+} fs_qfilestat_t;
+
+typedef struct fs_quota_stat {
+	__s8 qs_version;	/* version number for future changes */
+	__u16 qs_flags;		/* XFS_QUOTA_{U,P,G}DQ_{ACCT,ENFD} */
+	__s8 qs_pad;		/* unused */
+	fs_qfilestat_t qs_uquota;	/* user quota storage information */
+	fs_qfilestat_t qs_gquota;	/* group quota storage information */
+	__u32 qs_incoredqs;	/* number of dquots incore */
+	__s32 qs_btimelimit;	/* limit for blks timer */
+	__s32 qs_itimelimit;	/* limit for inodes timer */
+	__s32 qs_rtbtimelimit;	/* limit for rt blks timer */
+	__u16 qs_bwarnlimit;	/* limit for num warnings */
+	__u16 qs_iwarnlimit;	/* limit for num warnings */
+} fs_quota_stat_t;
+
+#endif /* _QUOTAIO_XFS_H */