cregit-Linux how code gets into the kernel

Release 4.12 include/uapi/linux/dqblk_xfs.h

Directory: include/uapi/linux
/*
 * Copyright (c) 1995-2001,2004 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesset General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef _LINUX_DQBLK_XFS_H

#define _LINUX_DQBLK_XFS_H

#include <linux/types.h>

/*
 * Disk quota - quotactl(2) commands for the XFS Quota Manager (XQM).
 */


#define XQM_CMD(x)	(('X'<<8)+(x))	
/* note: forms first QCMD argument */

#define XQM_COMMAND(x)	(((x) & (0xff<<8)) == ('X'<<8))	
/* test if for XFS */


#define XQM_USRQUOTA	0	
/* system call user quota type */

#define XQM_GRPQUOTA	1	
/* system call group quota type */

#define XQM_PRJQUOTA	2	
/* system call project quota type */

#define XQM_MAXQUOTAS	3


#define Q_XQUOTAON	XQM_CMD(1)	
/* enable accounting/enforcement */

#define Q_XQUOTAOFF	XQM_CMD(2)	
/* disable accounting/enforcement */

#define Q_XGETQUOTA	XQM_CMD(3)	
/* get disk limits and usage */

#define Q_XSETQLIM	XQM_CMD(4)	
/* set disk limits */

#define Q_XGETQSTAT	XQM_CMD(5)	
/* get quota subsystem status */

#define Q_XQUOTARM	XQM_CMD(6)	
/* free disk space used by dquots */

#define Q_XQUOTASYNC	XQM_CMD(7)	
/* delalloc flush, updates dquots */

#define Q_XGETQSTATV	XQM_CMD(8)	
/* newer version of get quota */

#define Q_XGETNEXTQUOTA	XQM_CMD(9)	
/* get disk limits and usage >= ID */

/*
 * 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;	/* FS_{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)

/*
 * Warning counts are set in both super user's dquot and others. For others,
 * warnings are set/cleared by the administrators (or automatically by going
 * below the soft limit).  Superusers warning values set the warning limits
 * for the rest.  In case these values are zero, the DQ_{F,B}WARNLIMIT values
 * defined below are used. 
 * These values also apply only to the d_fieldmask field for Q_XSETQLIM.
 */

#define FS_DQ_BWARNS	(1<<9)

#define FS_DQ_IWARNS	(1<<10)

#define FS_DQ_RTBWARNS	(1<<11)

#define FS_DQ_WARNS_MASK	(FS_DQ_BWARNS | FS_DQ_IWARNS | FS_DQ_RTBWARNS)

/*
 * Accounting values.  These can only be set for filesystem with
 * non-transactional quotas that require quotacheck(8) in userspace.
 */

#define FS_DQ_BCOUNT		(1<<12)

#define FS_DQ_ICOUNT		(1<<13)

#define FS_DQ_RTBCOUNT		(1<<14)

#define FS_DQ_ACCT_MASK		(FS_DQ_BCOUNT | FS_DQ_ICOUNT | FS_DQ_RTBCOUNT)

/*
 * Various flags related to quotactl(2).
 */

#define FS_QUOTA_UDQ_ACCT	(1<<0)  
/* user quota accounting */

#define FS_QUOTA_UDQ_ENFD	(1<<1)  
/* user quota limits enforcement */

#define FS_QUOTA_GDQ_ACCT	(1<<2)  
/* group quota accounting */

#define FS_QUOTA_GDQ_ENFD	(1<<3)  
/* group quota limits enforcement */

#define FS_QUOTA_PDQ_ACCT	(1<<4)  
/* project quota accounting */

#define FS_QUOTA_PDQ_ENFD	(1<<5)  
/* project quota limits enforcement */


#define FS_USER_QUOTA		(1<<0)	
/* user quota type */

#define FS_PROJ_QUOTA		(1<<1)	
/* project quota type */

#define FS_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 information 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 information 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;	/* FS_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;

/*
 * fs_quota_statv is used by Q_XGETQSTATV for a given file system. It provides
 * a centralized way to get meta information about the quota subsystem. eg.
 * space taken up for user, group, and project quotas, number of dquots
 * currently incore.
 *
 * This version has proper versioning support with appropriate padding for
 * future expansions, and ability to expand for future without creating any
 * backward compatibility issues.
 *
 * Q_XGETQSTATV uses the passed in value of the requested version via
 * fs_quota_statv.qs_version to determine the return data layout of
 * fs_quota_statv.  The kernel will fill the data fields relevant to that
 * version.
 *
 * If kernel does not support user space caller specified version, EINVAL will
 * be returned. User space caller can then reduce the version number and retry
 * the same command.
 */

#define FS_QSTATV_VERSION1	1	
/* fs_quota_statv.qs_version */
/*
 * Some basic information about 'quota files' for Q_XGETQSTATV command
 */

struct fs_qfilestatv {
	
__u64		qfs_ino;	/* inode number */
	
__u64		qfs_nblks;	/* number of BBs 512-byte-blks */
	
__u32		qfs_nextents;	/* number of extents */
	
__u32		qfs_pad;	/* pad for 8-byte alignment */
};


struct fs_quota_statv {
	
__s8			qs_version;	/* version for future changes */
	
__u8			qs_pad1;	/* pad for 16bit alignment */
	
__u16			qs_flags;	/* FS_QUOTA_.* flags */
	
__u32			qs_incoredqs;	/* number of dquots incore */
	
struct fs_qfilestatv	qs_uquota;	/* user quota information */
	
struct fs_qfilestatv	qs_gquota;	/* group quota information */
	
struct fs_qfilestatv	qs_pquota;	/* project quota information */
	
__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 */
	
__u64			qs_pad2[8];	/* for future proofing */
};

#endif	/* _LINUX_DQBLK_XFS_H */

Overall Contributors
PersonTokensPropCommitsCommitProp
Jan Kara31463.69%216.67%


Chandra Seetharaman9619.47%18.33%


Nathan Scott448.92%433.33%


Christoph Hellwig326.49%325.00%


Eric Sandeen51.01%18.33%


Adrian Bunk20.41%18.33%


Total493100.00%12100.00%


Directory: include/uapi/linux



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