fs/xfs/libxfs/xfs_quota_defs.h - kernel/quantenna - Git at Google

 /*
  * Copyright (c) 2000-2005 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 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.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write the Free Software Foundation,
  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 #ifndef __XFS_QUOTA_DEFS_H__
 #define __XFS_QUOTA_DEFS_H__

 /*
  * Quota definitions shared between user and kernel source trees.
  */

 /*
  * Even though users may not have quota limits occupying all 64-bits,
  * they may need 64-bit accounting. Hence, 64-bit quota-counters,
  * and quota-limits. This is a waste in the common case, but hey ...
  */
 typedef __uint64_t	xfs_qcnt_t;
 typedef __uint16_t	xfs_qwarncnt_t;

 /*
  * flags for q_flags field in the dquot.
  */
 #define XFS_DQ_USER		0x0001		/* a user quota */
 #define XFS_DQ_PROJ		0x0002		/* project quota */
 #define XFS_DQ_GROUP		0x0004		/* a group quota */
 #define XFS_DQ_DIRTY		0x0008		/* dquot is dirty */
 #define XFS_DQ_FREEING		0x0010		/* dquot is being torn down */

 #define XFS_DQ_ALLTYPES		(XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)

 #define XFS_DQ_FLAGS \
 	{ XFS_DQ_USER,		"USER" }, \
 	{ XFS_DQ_PROJ,		"PROJ" }, \
 	{ XFS_DQ_GROUP,		"GROUP" }, \
 	{ XFS_DQ_DIRTY,		"DIRTY" }, \
 	{ XFS_DQ_FREEING,	"FREEING" }

 /*
  * We have the possibility of all three quota types being active at once, and
  * hence free space modification requires modification of all three current
  * dquots in a single transaction. For this case we need to have a reservation
  * of at least 3 dquots.
  *
  * However, a chmod operation can change both UID and GID in a single
  * transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
  * modified. Hence for this case we need to reserve space for at least 4 dquots.
  *
  * And in the worst case, there's a rename operation that can be modifying up to
  * 4 inodes with dquots attached to them. In reality, the only inodes that can
  * have their dquots modified are the source and destination directory inodes
  * due to directory name creation and removal. That can require space allocation
  * and/or freeing on both directory inodes, and hence all three dquots on each
  * inode can be modified. And if the directories are world writeable, all the
  * dquots can be unique and so 6 dquots can be modified....
  *
  * And, of course, we also need to take into account the dquot log format item
  * used to describe each dquot.
  */
 #define XFS_DQUOT_LOGRES(mp)	\
 	((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)

 #define XFS_IS_QUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
 #define XFS_IS_UQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_UQUOTA_ACCT)
 #define XFS_IS_PQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_PQUOTA_ACCT)
 #define XFS_IS_GQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_GQUOTA_ACCT)
 #define XFS_IS_UQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_UQUOTA_ENFD)
 #define XFS_IS_GQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_GQUOTA_ENFD)
 #define XFS_IS_PQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_PQUOTA_ENFD)

 /*
  * Incore only flags for quotaoff - these bits get cleared when quota(s)
  * are in the process of getting turned off. These flags are in m_qflags but
  * never in sb_qflags.
  */
 #define XFS_UQUOTA_ACTIVE	0x1000  /* uquotas are being turned off */
 #define XFS_GQUOTA_ACTIVE	0x2000  /* gquotas are being turned off */
 #define XFS_PQUOTA_ACTIVE	0x4000  /* pquotas are being turned off */
 #define XFS_ALL_QUOTA_ACTIVE	\
 	(XFS_UQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE)

 /*
  * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
  * quota will be not be switched off as long as that inode lock is held.
  */
 #define XFS_IS_QUOTA_ON(mp)	((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
 						   XFS_GQUOTA_ACTIVE | \
 						   XFS_PQUOTA_ACTIVE))
 #define XFS_IS_UQUOTA_ON(mp)	((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
 #define XFS_IS_GQUOTA_ON(mp)	((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
 #define XFS_IS_PQUOTA_ON(mp)	((mp)->m_qflags & XFS_PQUOTA_ACTIVE)

 /*
  * Flags to tell various functions what to do. Not all of these are meaningful
  * to a single function. None of these XFS_QMOPT_* flags are meant to have
  * persistent values (ie. their values can and will change between versions)
  */
 #define XFS_QMOPT_DQALLOC	0x0000002 /* alloc dquot ondisk if needed */
 #define XFS_QMOPT_UQUOTA	0x0000004 /* user dquot requested */
 #define XFS_QMOPT_PQUOTA	0x0000008 /* project dquot requested */
 #define XFS_QMOPT_FORCE_RES	0x0000010 /* ignore quota limits */
 #define XFS_QMOPT_SBVERSION	0x0000040 /* change superblock version num */
 #define XFS_QMOPT_DOWARN        0x0000400 /* increase warning cnt if needed */
 #define XFS_QMOPT_DQREPAIR	0x0001000 /* repair dquot if damaged */
 #define XFS_QMOPT_GQUOTA	0x0002000 /* group dquot requested */
 #define XFS_QMOPT_ENOSPC	0x0004000 /* enospc instead of edquot (prj) */
 #define XFS_QMOPT_DQNEXT	0x0008000 /* return next dquot >= this ID */

 /*
  * flags to xfs_trans_mod_dquot to indicate which field needs to be
  * modified.
  */
 #define XFS_QMOPT_RES_REGBLKS	0x0010000
 #define XFS_QMOPT_RES_RTBLKS	0x0020000
 #define XFS_QMOPT_BCOUNT	0x0040000
 #define XFS_QMOPT_ICOUNT	0x0080000
 #define XFS_QMOPT_RTBCOUNT	0x0100000
 #define XFS_QMOPT_DELBCOUNT	0x0200000
 #define XFS_QMOPT_DELRTBCOUNT	0x0400000
 #define XFS_QMOPT_RES_INOS	0x0800000

 /*
  * flags for dqalloc.
  */
 #define XFS_QMOPT_INHERIT	0x1000000

 /*
  * flags to xfs_trans_mod_dquot.
  */
 #define XFS_TRANS_DQ_RES_BLKS	XFS_QMOPT_RES_REGBLKS
 #define XFS_TRANS_DQ_RES_RTBLKS	XFS_QMOPT_RES_RTBLKS
 #define XFS_TRANS_DQ_RES_INOS	XFS_QMOPT_RES_INOS
 #define XFS_TRANS_DQ_BCOUNT	XFS_QMOPT_BCOUNT
 #define XFS_TRANS_DQ_DELBCOUNT	XFS_QMOPT_DELBCOUNT
 #define XFS_TRANS_DQ_ICOUNT	XFS_QMOPT_ICOUNT
 #define XFS_TRANS_DQ_RTBCOUNT	XFS_QMOPT_RTBCOUNT
 #define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT


 #define XFS_QMOPT_QUOTALL	\
 		(XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
 #define XFS_QMOPT_RESBLK_MASK	(XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)

 extern int xfs_dqcheck(struct xfs_mount *mp, xfs_disk_dquot_t *ddq,
 		       xfs_dqid_t id, uint type, uint flags, const char *str);
 extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);

 #endif	/* __XFS_QUOTA_H__ */
	/*
	* Copyright (c) 2000-2005 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 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. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/
	#ifndef __XFS_QUOTA_DEFS_H__
	#define __XFS_QUOTA_DEFS_H__

	/*
	* Quota definitions shared between user and kernel source trees.
	*/

	/*
	* Even though users may not have quota limits occupying all 64-bits,
	* they may need 64-bit accounting. Hence, 64-bit quota-counters,
	* and quota-limits. This is a waste in the common case, but hey ...
	*/
	typedef __uint64_t xfs_qcnt_t;
	typedef __uint16_t xfs_qwarncnt_t;

	/*
	* flags for q_flags field in the dquot.
	*/
	#define XFS_DQ_USER 0x0001 /* a user quota */
	#define XFS_DQ_PROJ 0x0002 /* project quota */
	#define XFS_DQ_GROUP 0x0004 /* a group quota */
	#define XFS_DQ_DIRTY 0x0008 /* dquot is dirty */
	#define XFS_DQ_FREEING 0x0010 /* dquot is being torn down */

	#define XFS_DQ_ALLTYPES (XFS_DQ_USER\|XFS_DQ_PROJ\|XFS_DQ_GROUP)

	#define XFS_DQ_FLAGS \
	{ XFS_DQ_USER, "USER" }, \
	{ XFS_DQ_PROJ, "PROJ" }, \
	{ XFS_DQ_GROUP, "GROUP" }, \
	{ XFS_DQ_DIRTY, "DIRTY" }, \
	{ XFS_DQ_FREEING, "FREEING" }

	/*
	* We have the possibility of all three quota types being active at once, and
	* hence free space modification requires modification of all three current
	* dquots in a single transaction. For this case we need to have a reservation
	* of at least 3 dquots.
	*
	* However, a chmod operation can change both UID and GID in a single
	* transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
	* modified. Hence for this case we need to reserve space for at least 4 dquots.
	*
	* And in the worst case, there's a rename operation that can be modifying up to
	* 4 inodes with dquots attached to them. In reality, the only inodes that can
	* have their dquots modified are the source and destination directory inodes
	* due to directory name creation and removal. That can require space allocation
	* and/or freeing on both directory inodes, and hence all three dquots on each
	* inode can be modified. And if the directories are world writeable, all the
	* dquots can be unique and so 6 dquots can be modified....
	*
	* And, of course, we also need to take into account the dquot log format item
	* used to describe each dquot.
	*/
	#define XFS_DQUOT_LOGRES(mp) \
	((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)

	#define XFS_IS_QUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
	#define XFS_IS_UQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_UQUOTA_ACCT)
	#define XFS_IS_PQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_PQUOTA_ACCT)
	#define XFS_IS_GQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_GQUOTA_ACCT)
	#define XFS_IS_UQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_UQUOTA_ENFD)
	#define XFS_IS_GQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_GQUOTA_ENFD)
	#define XFS_IS_PQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_PQUOTA_ENFD)

	/*
	* Incore only flags for quotaoff - these bits get cleared when quota(s)
	* are in the process of getting turned off. These flags are in m_qflags but
	* never in sb_qflags.
	*/
	#define XFS_UQUOTA_ACTIVE 0x1000 /* uquotas are being turned off */
	#define XFS_GQUOTA_ACTIVE 0x2000 /* gquotas are being turned off */
	#define XFS_PQUOTA_ACTIVE 0x4000 /* pquotas are being turned off */
	#define XFS_ALL_QUOTA_ACTIVE \
	(XFS_UQUOTA_ACTIVE \| XFS_GQUOTA_ACTIVE \| XFS_PQUOTA_ACTIVE)

	/*
	* Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
	* quota will be not be switched off as long as that inode lock is held.
	*/
	#define XFS_IS_QUOTA_ON(mp) ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE \| \
	XFS_GQUOTA_ACTIVE \| \
	XFS_PQUOTA_ACTIVE))
	#define XFS_IS_UQUOTA_ON(mp) ((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
	#define XFS_IS_GQUOTA_ON(mp) ((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
	#define XFS_IS_PQUOTA_ON(mp) ((mp)->m_qflags & XFS_PQUOTA_ACTIVE)

	/*
	* Flags to tell various functions what to do. Not all of these are meaningful
	* to a single function. None of these XFS_QMOPT_* flags are meant to have
	* persistent values (ie. their values can and will change between versions)
	*/
	#define XFS_QMOPT_DQALLOC 0x0000002 /* alloc dquot ondisk if needed */
	#define XFS_QMOPT_UQUOTA 0x0000004 /* user dquot requested */
	#define XFS_QMOPT_PQUOTA 0x0000008 /* project dquot requested */
	#define XFS_QMOPT_FORCE_RES 0x0000010 /* ignore quota limits */
	#define XFS_QMOPT_SBVERSION 0x0000040 /* change superblock version num */
	#define XFS_QMOPT_DOWARN 0x0000400 /* increase warning cnt if needed */
	#define XFS_QMOPT_DQREPAIR 0x0001000 /* repair dquot if damaged */
	#define XFS_QMOPT_GQUOTA 0x0002000 /* group dquot requested */
	#define XFS_QMOPT_ENOSPC 0x0004000 /* enospc instead of edquot (prj) */
	#define XFS_QMOPT_DQNEXT 0x0008000 /* return next dquot >= this ID */

	/*
	* flags to xfs_trans_mod_dquot to indicate which field needs to be
	* modified.
	*/
	#define XFS_QMOPT_RES_REGBLKS 0x0010000
	#define XFS_QMOPT_RES_RTBLKS 0x0020000
	#define XFS_QMOPT_BCOUNT 0x0040000
	#define XFS_QMOPT_ICOUNT 0x0080000
	#define XFS_QMOPT_RTBCOUNT 0x0100000
	#define XFS_QMOPT_DELBCOUNT 0x0200000
	#define XFS_QMOPT_DELRTBCOUNT 0x0400000
	#define XFS_QMOPT_RES_INOS 0x0800000

	/*
	* flags for dqalloc.
	*/
	#define XFS_QMOPT_INHERIT 0x1000000

	/*
	* flags to xfs_trans_mod_dquot.
	*/
	#define XFS_TRANS_DQ_RES_BLKS XFS_QMOPT_RES_REGBLKS
	#define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
	#define XFS_TRANS_DQ_RES_INOS XFS_QMOPT_RES_INOS
	#define XFS_TRANS_DQ_BCOUNT XFS_QMOPT_BCOUNT
	#define XFS_TRANS_DQ_DELBCOUNT XFS_QMOPT_DELBCOUNT
	#define XFS_TRANS_DQ_ICOUNT XFS_QMOPT_ICOUNT
	#define XFS_TRANS_DQ_RTBCOUNT XFS_QMOPT_RTBCOUNT
	#define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT


	#define XFS_QMOPT_QUOTALL \
	(XFS_QMOPT_UQUOTA \| XFS_QMOPT_PQUOTA \| XFS_QMOPT_GQUOTA)
	#define XFS_QMOPT_RESBLK_MASK (XFS_QMOPT_RES_REGBLKS \| XFS_QMOPT_RES_RTBLKS)

	extern int xfs_dqcheck(struct xfs_mount mp, xfs_disk_dquot_t ddq,
	xfs_dqid_t id, uint type, uint flags, const char *str);
	extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);

	#endif /* __XFS_QUOTA_H__ */