fs/xfs/xfs_dmapi.h - kernel/msm-4.19 - Gitiles

 /*
  * Copyright (c) 2000-2004 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 __XFS_DMAPI_H__
 #define __XFS_DMAPI_H__

 /*	Values used to define the on-disk version of dm_attrname_t. All
  *	on-disk attribute names start with the 8-byte string "SGI_DMI_".
  *
  *      In the on-disk inode, DMAPI attribute names consist of the user-provided
  *      name with the DMATTR_PREFIXSTRING pre-pended.  This string must NEVER be
  *      changed.
  */

 #define DMATTR_PREFIXLEN	8
 #define DMATTR_PREFIXSTRING	"SGI_DMI_"

 typedef enum {
 	DM_EVENT_INVALID	= -1,
 	DM_EVENT_CANCEL		= 0,		/* not supported */
 	DM_EVENT_MOUNT		= 1,
 	DM_EVENT_PREUNMOUNT	= 2,
 	DM_EVENT_UNMOUNT	= 3,
 	DM_EVENT_DEBUT		= 4,		/* not supported */
 	DM_EVENT_CREATE		= 5,
 	DM_EVENT_CLOSE		= 6,		/* not supported */
 	DM_EVENT_POSTCREATE	= 7,
 	DM_EVENT_REMOVE		= 8,
 	DM_EVENT_POSTREMOVE	= 9,
 	DM_EVENT_RENAME		= 10,
 	DM_EVENT_POSTRENAME	= 11,
 	DM_EVENT_LINK		= 12,
 	DM_EVENT_POSTLINK	= 13,
 	DM_EVENT_SYMLINK	= 14,
 	DM_EVENT_POSTSYMLINK	= 15,
 	DM_EVENT_READ		= 16,
 	DM_EVENT_WRITE		= 17,
 	DM_EVENT_TRUNCATE	= 18,
 	DM_EVENT_ATTRIBUTE	= 19,
 	DM_EVENT_DESTROY	= 20,
 	DM_EVENT_NOSPACE	= 21,
 	DM_EVENT_USER		= 22,
 	DM_EVENT_MAX		= 23
 } dm_eventtype_t;
 #define HAVE_DM_EVENTTYPE_T

 typedef enum {
 	DM_RIGHT_NULL,
 	DM_RIGHT_SHARED,
 	DM_RIGHT_EXCL
 } dm_right_t;
 #define HAVE_DM_RIGHT_T

 /* Defines for determining if an event message should be sent. */
 #define	DM_EVENT_ENABLED(vfsp, ip, event) ( \
 	unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
 		( ((ip)->i_d.di_dmevmask & (1 << event)) || \
 		  ((ip)->i_mount->m_dmevmask & (1 << event)) ) \
 	)

 #define	DM_EVENT_ENABLED_IO(vfsp, io, event) ( \
 	unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
 		( ((io)->io_dmevmask & (1 << event)) || \
 		  ((io)->io_mount->m_dmevmask & (1 << event)) ) \
 	)

 #define DM_XFS_VALID_FS_EVENTS		( \
 	(1 << DM_EVENT_PREUNMOUNT)	| \
 	(1 << DM_EVENT_UNMOUNT)		| \
 	(1 << DM_EVENT_NOSPACE)		| \
 	(1 << DM_EVENT_DEBUT)		| \
 	(1 << DM_EVENT_CREATE)		| \
 	(1 << DM_EVENT_POSTCREATE)	| \
 	(1 << DM_EVENT_REMOVE)		| \
 	(1 << DM_EVENT_POSTREMOVE)	| \
 	(1 << DM_EVENT_RENAME)		| \
 	(1 << DM_EVENT_POSTRENAME)	| \
 	(1 << DM_EVENT_LINK)		| \
 	(1 << DM_EVENT_POSTLINK)	| \
 	(1 << DM_EVENT_SYMLINK)		| \
 	(1 << DM_EVENT_POSTSYMLINK)	| \
 	(1 << DM_EVENT_ATTRIBUTE)	| \
 	(1 << DM_EVENT_DESTROY)		)

 /* Events valid in dm_set_eventlist() when called with a file handle for
    a regular file or a symlink.  These events are persistent.
 */

 #define	DM_XFS_VALID_FILE_EVENTS	( \
 	(1 << DM_EVENT_ATTRIBUTE)	| \
 	(1 << DM_EVENT_DESTROY)		)

 /* Events valid in dm_set_eventlist() when called with a file handle for
    a directory.  These events are persistent.
 */

 #define	DM_XFS_VALID_DIRECTORY_EVENTS	( \
 	(1 << DM_EVENT_CREATE)		| \
 	(1 << DM_EVENT_POSTCREATE)	| \
 	(1 << DM_EVENT_REMOVE)		| \
 	(1 << DM_EVENT_POSTREMOVE)	| \
 	(1 << DM_EVENT_RENAME)		| \
 	(1 << DM_EVENT_POSTRENAME)	| \
 	(1 << DM_EVENT_LINK)		| \
 	(1 << DM_EVENT_POSTLINK)	| \
 	(1 << DM_EVENT_SYMLINK)		| \
 	(1 << DM_EVENT_POSTSYMLINK)	| \
 	(1 << DM_EVENT_ATTRIBUTE)	| \
 	(1 << DM_EVENT_DESTROY)		)

 /* Events supported by the XFS filesystem. */
 #define	DM_XFS_SUPPORTED_EVENTS		( \
 	(1 << DM_EVENT_MOUNT)		| \
 	(1 << DM_EVENT_PREUNMOUNT)	| \
 	(1 << DM_EVENT_UNMOUNT)		| \
 	(1 << DM_EVENT_NOSPACE)		| \
 	(1 << DM_EVENT_CREATE)		| \
 	(1 << DM_EVENT_POSTCREATE)	| \
 	(1 << DM_EVENT_REMOVE)		| \
 	(1 << DM_EVENT_POSTREMOVE)	| \
 	(1 << DM_EVENT_RENAME)		| \
 	(1 << DM_EVENT_POSTRENAME)	| \
 	(1 << DM_EVENT_LINK)		| \
 	(1 << DM_EVENT_POSTLINK)	| \
 	(1 << DM_EVENT_SYMLINK)		| \
 	(1 << DM_EVENT_POSTSYMLINK)	| \
 	(1 << DM_EVENT_READ)		| \
 	(1 << DM_EVENT_WRITE)		| \
 	(1 << DM_EVENT_TRUNCATE)	| \
 	(1 << DM_EVENT_ATTRIBUTE)	| \
 	(1 << DM_EVENT_DESTROY)		)


 /*
  *	Definitions used for the flags field on dm_send_*_event().
  */

 #define DM_FLAGS_NDELAY		0x001	/* return EAGAIN after dm_pending() */
 #define DM_FLAGS_UNWANTED	0x002	/* event not in fsys dm_eventset_t */
 #define DM_FLAGS_ISEM		0x004	/* thread holds i_sem */
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,21)
 /* i_alloc_sem was added in 2.4.22-pre1 */
 #define DM_FLAGS_IALLOCSEM_RD	0x010	/* thread holds i_alloc_sem rd */
 #define DM_FLAGS_IALLOCSEM_WR	0x020	/* thread holds i_alloc_sem wr */
 #endif
 #endif

 /*
  *	Based on IO_ISDIRECT, decide which i_ flag is set.
  */
 #ifdef DM_FLAGS_IALLOCSEM_RD
 #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
 			      DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM)
 #define DM_SEM_FLAG_WR	(DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM)
 #else
 #define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
 			      0 : DM_FLAGS_ISEM)
 #define DM_SEM_FLAG_WR	(DM_FLAGS_ISEM)
 #endif

 /*
  *	Macros to turn caller specified delay/block flags into
  *	dm_send_xxxx_event flag DM_FLAGS_NDELAY.
  */

 #define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY|O_NONBLOCK)) ? \
 			DM_FLAGS_NDELAY : 0)
 #define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0)


 extern struct bhv_vfsops xfs_dmops;

 #ifdef CONFIG_XFS_DMAPI
 void xfs_dm_init(struct file_system_type *);
 void xfs_dm_exit(struct file_system_type *);
 #define XFS_DM_INIT(fstype)	xfs_dm_init(fstype)
 #define XFS_DM_EXIT(fstype)	xfs_dm_exit(fstype)
 #else
 #define XFS_DM_INIT(fstype)
 #define XFS_DM_EXIT(fstype)
 #endif

 #define HAVE_XFS_DM_MM
 int xfs_dm_mm_get(struct vm_area_struct *vma);
 void xfs_dm_mm_put(struct vm_area_struct *vma);

 #endif  /* __XFS_DMAPI_H__ */
	/*
	* Copyright (c) 2000-2004 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 __XFS_DMAPI_H__
	#define __XFS_DMAPI_H__

	/* Values used to define the on-disk version of dm_attrname_t. All
	* on-disk attribute names start with the 8-byte string "SGI_DMI_".
	*
	* In the on-disk inode, DMAPI attribute names consist of the user-provided
	* name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be
	* changed.
	*/

	#define DMATTR_PREFIXLEN 8
	#define DMATTR_PREFIXSTRING "SGI_DMI_"

	typedef enum {
	DM_EVENT_INVALID = -1,
	DM_EVENT_CANCEL = 0, /* not supported */
	DM_EVENT_MOUNT = 1,
	DM_EVENT_PREUNMOUNT = 2,
	DM_EVENT_UNMOUNT = 3,
	DM_EVENT_DEBUT = 4, /* not supported */
	DM_EVENT_CREATE = 5,
	DM_EVENT_CLOSE = 6, /* not supported */
	DM_EVENT_POSTCREATE = 7,
	DM_EVENT_REMOVE = 8,
	DM_EVENT_POSTREMOVE = 9,
	DM_EVENT_RENAME = 10,
	DM_EVENT_POSTRENAME = 11,
	DM_EVENT_LINK = 12,
	DM_EVENT_POSTLINK = 13,
	DM_EVENT_SYMLINK = 14,
	DM_EVENT_POSTSYMLINK = 15,
	DM_EVENT_READ = 16,
	DM_EVENT_WRITE = 17,
	DM_EVENT_TRUNCATE = 18,
	DM_EVENT_ATTRIBUTE = 19,
	DM_EVENT_DESTROY = 20,
	DM_EVENT_NOSPACE = 21,
	DM_EVENT_USER = 22,
	DM_EVENT_MAX = 23
	} dm_eventtype_t;
	#define HAVE_DM_EVENTTYPE_T

	typedef enum {
	DM_RIGHT_NULL,
	DM_RIGHT_SHARED,
	DM_RIGHT_EXCL
	} dm_right_t;
	#define HAVE_DM_RIGHT_T

	/* Defines for determining if an event message should be sent. */
	#define DM_EVENT_ENABLED(vfsp, ip, event) ( \
	unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
	( ((ip)->i_d.di_dmevmask & (1 << event)) \|\| \
	((ip)->i_mount->m_dmevmask & (1 << event)) ) \
	)

	#define DM_EVENT_ENABLED_IO(vfsp, io, event) ( \
	unlikely ((vfsp)->vfs_flag & VFS_DMI) && \
	( ((io)->io_dmevmask & (1 << event)) \|\| \
	((io)->io_mount->m_dmevmask & (1 << event)) ) \
	)

	#define DM_XFS_VALID_FS_EVENTS ( \
	(1 << DM_EVENT_PREUNMOUNT) \| \
	(1 << DM_EVENT_UNMOUNT) \| \
	(1 << DM_EVENT_NOSPACE) \| \
	(1 << DM_EVENT_DEBUT) \| \
	(1 << DM_EVENT_CREATE) \| \
	(1 << DM_EVENT_POSTCREATE) \| \
	(1 << DM_EVENT_REMOVE) \| \
	(1 << DM_EVENT_POSTREMOVE) \| \
	(1 << DM_EVENT_RENAME) \| \
	(1 << DM_EVENT_POSTRENAME) \| \
	(1 << DM_EVENT_LINK) \| \
	(1 << DM_EVENT_POSTLINK) \| \
	(1 << DM_EVENT_SYMLINK) \| \
	(1 << DM_EVENT_POSTSYMLINK) \| \
	(1 << DM_EVENT_ATTRIBUTE) \| \
	(1 << DM_EVENT_DESTROY) )

	/* Events valid in dm_set_eventlist() when called with a file handle for
	a regular file or a symlink. These events are persistent.
	*/

	#define DM_XFS_VALID_FILE_EVENTS ( \
	(1 << DM_EVENT_ATTRIBUTE) \| \
	(1 << DM_EVENT_DESTROY) )

	/* Events valid in dm_set_eventlist() when called with a file handle for
	a directory. These events are persistent.
	*/

	#define DM_XFS_VALID_DIRECTORY_EVENTS ( \
	(1 << DM_EVENT_CREATE) \| \
	(1 << DM_EVENT_POSTCREATE) \| \
	(1 << DM_EVENT_REMOVE) \| \
	(1 << DM_EVENT_POSTREMOVE) \| \
	(1 << DM_EVENT_RENAME) \| \
	(1 << DM_EVENT_POSTRENAME) \| \
	(1 << DM_EVENT_LINK) \| \
	(1 << DM_EVENT_POSTLINK) \| \
	(1 << DM_EVENT_SYMLINK) \| \
	(1 << DM_EVENT_POSTSYMLINK) \| \
	(1 << DM_EVENT_ATTRIBUTE) \| \
	(1 << DM_EVENT_DESTROY) )

	/* Events supported by the XFS filesystem. */
	#define DM_XFS_SUPPORTED_EVENTS ( \
	(1 << DM_EVENT_MOUNT) \| \
	(1 << DM_EVENT_PREUNMOUNT) \| \
	(1 << DM_EVENT_UNMOUNT) \| \
	(1 << DM_EVENT_NOSPACE) \| \
	(1 << DM_EVENT_CREATE) \| \
	(1 << DM_EVENT_POSTCREATE) \| \
	(1 << DM_EVENT_REMOVE) \| \
	(1 << DM_EVENT_POSTREMOVE) \| \
	(1 << DM_EVENT_RENAME) \| \
	(1 << DM_EVENT_POSTRENAME) \| \
	(1 << DM_EVENT_LINK) \| \
	(1 << DM_EVENT_POSTLINK) \| \
	(1 << DM_EVENT_SYMLINK) \| \
	(1 << DM_EVENT_POSTSYMLINK) \| \
	(1 << DM_EVENT_READ) \| \
	(1 << DM_EVENT_WRITE) \| \
	(1 << DM_EVENT_TRUNCATE) \| \
	(1 << DM_EVENT_ATTRIBUTE) \| \
	(1 << DM_EVENT_DESTROY) )


	/*
	* Definitions used for the flags field on dm_send_*_event().
	*/

	#define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */
	#define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */
	#define DM_FLAGS_ISEM 0x004 /* thread holds i_sem */
	#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
	#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,21)
	/* i_alloc_sem was added in 2.4.22-pre1 */
	#define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */
	#define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */
	#endif
	#endif

	/*
	* Based on IO_ISDIRECT, decide which i_ flag is set.
	*/
	#ifdef DM_FLAGS_IALLOCSEM_RD
	#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
	DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM)
	#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR \| DM_FLAGS_ISEM)
	#else
	#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
	0 : DM_FLAGS_ISEM)
	#define DM_SEM_FLAG_WR (DM_FLAGS_ISEM)
	#endif

	/*
	* Macros to turn caller specified delay/block flags into
	* dm_send_xxxx_event flag DM_FLAGS_NDELAY.
	*/

	#define FILP_DELAY_FLAG(filp) ((filp->f_flags&(O_NDELAY\|O_NONBLOCK)) ? \
	DM_FLAGS_NDELAY : 0)
	#define AT_DELAY_FLAG(f) ((f&ATTR_NONBLOCK) ? DM_FLAGS_NDELAY : 0)


	extern struct bhv_vfsops xfs_dmops;

	#ifdef CONFIG_XFS_DMAPI
	void xfs_dm_init(struct file_system_type *);
	void xfs_dm_exit(struct file_system_type *);
	#define XFS_DM_INIT(fstype) xfs_dm_init(fstype)
	#define XFS_DM_EXIT(fstype) xfs_dm_exit(fstype)
	#else
	#define XFS_DM_INIT(fstype)
	#define XFS_DM_EXIT(fstype)
	#endif

	#define HAVE_XFS_DM_MM
	int xfs_dm_mm_get(struct vm_area_struct *vma);
	void xfs_dm_mm_put(struct vm_area_struct *vma);

	#endif /* __XFS_DMAPI_H__ */