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merge Steve's sync changes over to 2.5
Merge of 2.4.x-xfs:slinx:147673a originally by lord on 05/01/03
  Rework of how xfs syncs metadata to disk. This has a number of
  benefits: We no longer walk the list of all the inodes in the
  filesystem everytime the write_super is called. If you type
  sync and then reset the box then everything is definitely
  recovered afterwards. We remove a lot of calls to
  mark_inode_dirty which did not really do us any good, and
  replace them with a single one which does. kupdated does
  less work in xfs now, freeing it to do other things.
  Finally, get the dummy log record code working, this
  means that after a period of inactivity with everything
  on disk, we clean the log so that recovery does not 
  have any work to do.
  prototypes for linvfs_start_syncd and linvfs_stop_syncd

Merge of 2.4.x-xfs:slinx:147897a originally by hch on 05/05/03
  small fixes for the sync changes
  linvfs_start_syncd returns int now

/*
 * Copyright (c) 2000-2003 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_SUPER_H__
#define __XFS_SUPER_H__

#ifdef CONFIG_XFS_DMAPI
# define vfs_insertdmapi(vfs)	vfs_insertops(vfsp, &xfs_dmops)
# define vfs_initdmapi()	dmapi_init()
# define vfs_exitdmapi()	dmapi_uninit()
#else
# define vfs_insertdmapi(vfs)	do { } while (0)
# define vfs_initdmapi()	do { } while (0)
# define vfs_exitdmapi()	do { } while (0)
#endif

#ifdef CONFIG_XFS_QUOTA
# define vfs_insertquota(vfs)	vfs_insertops(vfsp, &xfs_qmops)
# define vfs_initquota()	xfs_qm_init()
# define vfs_exitquota()	xfs_qm_exit()
#else
# define vfs_insertquota(vfs)	do { } while (0)
# define vfs_initquota()	do { } while (0)
# define vfs_exitquota()	do { } while (0)
#endif

#ifdef CONFIG_XFS_POSIX_ACL
# define XFS_ACL_STRING		"ACLs, "
# define set_posix_acl_flag(sb)	((sb)->s_flags |= MS_POSIXACL)
#else
# define XFS_ACL_STRING
# define set_posix_acl_flag(sb)	do { } while (0)
#endif

#ifdef CONFIG_XFS_RT
# define XFS_REALTIME_STRING	"realtime, "
#else
# define XFS_REALTIME_STRING
#endif

#ifdef CONFIG_XFS_VNODE_TRACING
# define XFS_VNTRACE_STRING	"VN-trace, "
#else
# define XFS_VNTRACE_STRING
#endif

#ifdef XFSDEBUG
# define XFS_DBG_STRING		"debug"
#else
# define XFS_DBG_STRING		"no debug"
#endif

#define XFS_BUILD_OPTIONS	XFS_ACL_STRING \
				XFS_REALTIME_STRING \
				XFS_VNTRACE_STRING \
				XFS_DBG_STRING /* DBG must be last */

#define LINVFS_GET_VFS(s) \
	(vfs_t *)((s)->s_fs_info)
#define LINVFS_SET_VFS(s, vfsp) \
	((s)->s_fs_info = vfsp)

struct xfs_mount;
struct pb_target;
struct block_device;

extern struct inode *xfs_get_inode(bhv_desc_t *, xfs_ino_t, int);
extern void xfs_initialize_vnode(bhv_desc_t *, vnode_t *, bhv_desc_t *, int);

extern int  xfs_blkdev_get(struct xfs_mount *, const char *,
				struct block_device **);
extern void xfs_blkdev_put(struct block_device *);

extern struct pb_target *xfs_alloc_buftarg(struct block_device *);
extern void xfs_relse_buftarg(struct pb_target *);
extern void xfs_free_buftarg(struct pb_target *);

extern void xfs_setsize_buftarg(struct pb_target *, unsigned int, unsigned int);
extern unsigned int xfs_getsize_buftarg(struct pb_target *);
extern int linvfs_start_syncd(vfs_t *);
extern void linvfs_stop_syncd(vfs_t *);

#endif	/* __XFS_SUPER_H__ */