/*
   * Copyright (c) 2006-2007 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_FILESTREAM_H__
  #define __XFS_FILESTREAM_H__
  
  #ifdef __KERNEL__
  
  struct xfs_mount;
  struct xfs_inode;
  struct xfs_perag;
  struct xfs_bmalloca;
  
  #ifdef XFS_FILESTREAMS_TRACE
  #define XFS_FSTRM_KTRACE_INFO		1
  #define XFS_FSTRM_KTRACE_AGSCAN		2
  #define XFS_FSTRM_KTRACE_AGPICK1	3
  #define XFS_FSTRM_KTRACE_AGPICK2	4
  #define XFS_FSTRM_KTRACE_UPDATE		5
  #define XFS_FSTRM_KTRACE_FREE		6
  #define	XFS_FSTRM_KTRACE_ITEM_LOOKUP	7
  #define	XFS_FSTRM_KTRACE_ASSOCIATE	8
  #define	XFS_FSTRM_KTRACE_MOVEAG		9
  #define	XFS_FSTRM_KTRACE_ORPHAN		10
  
  #define XFS_FSTRM_KTRACE_SIZE	16384
  extern ktrace_t *xfs_filestreams_trace_buf;
  
  #endif

  /* allocation selection flags */
  typedef enum xfs_fstrm_alloc {
  	XFS_PICK_USERDATA = 1,
  	XFS_PICK_LOWSPACE = 2,
  } xfs_fstrm_alloc_t;
  
  /* prototypes for filestream.c */
  int xfs_filestream_init(void);
  void xfs_filestream_uninit(void);
  int xfs_filestream_mount(struct xfs_mount *mp);
  void xfs_filestream_unmount(struct xfs_mount *mp);

  xfs_agnumber_t xfs_filestream_lookup_ag(struct xfs_inode *ip);
  int xfs_filestream_associate(struct xfs_inode *dip, struct xfs_inode *ip);
  void xfs_filestream_deassociate(struct xfs_inode *ip);
  int xfs_filestream_new_ag(struct xfs_bmalloca *ap, xfs_agnumber_t *agp);
  
  
  /* filestreams for the inode? */

  static inline int

  xfs_inode_is_filestream(
  	struct xfs_inode	*ip)
  {
  	return (ip->i_mount->m_flags & XFS_MOUNT_FILESTREAMS) ||
  		xfs_iflags_test(ip, XFS_IFILESTREAM) ||
  		(ip->i_d.di_flags & XFS_DIFLAG_FILESTREAM);
  }
  
  #endif /* __KERNEL__ */
  
  #endif /* __XFS_FILESTREAM_H__ */