fs/xfs/xfs_filestream.h

   1 /*
   2  * Copyright (c) 2006-2007 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_FILESTREAM_H__
  19 #define __XFS_FILESTREAM_H__
  20
  21 #ifdef __KERNEL__
  22
  23 struct xfs_mount;
  24 struct xfs_inode;
  25 struct xfs_perag;
  26 struct xfs_bmalloca;
  27
  28 #ifdef XFS_FILESTREAMS_TRACE
  29 #define XFS_FSTRM_KTRACE_INFO           1
  30 #define XFS_FSTRM_KTRACE_AGSCAN         2
  31 #define XFS_FSTRM_KTRACE_AGPICK1        3
  32 #define XFS_FSTRM_KTRACE_AGPICK2        4
  33 #define XFS_FSTRM_KTRACE_UPDATE         5
  34 #define XFS_FSTRM_KTRACE_FREE           6
  35 #define XFS_FSTRM_KTRACE_ITEM_LOOKUP    7
  36 #define XFS_FSTRM_KTRACE_ASSOCIATE      8
  37 #define XFS_FSTRM_KTRACE_MOVEAG         9
  38 #define XFS_FSTRM_KTRACE_ORPHAN         10
  39
  40 #define XFS_FSTRM_KTRACE_SIZE   16384
  41 extern ktrace_t *xfs_filestreams_trace_buf;
  42
  43 #endif
  44
  45 /* allocation selection flags */
  46 typedef enum xfs_fstrm_alloc {
  47         XFS_PICK_USERDATA = 1,
  48         XFS_PICK_LOWSPACE = 2,
  49 } xfs_fstrm_alloc_t;
  50
  51 /* prototypes for filestream.c */
  52 int xfs_filestream_init(void);
  53 void xfs_filestream_uninit(void);
  54 int xfs_filestream_mount(struct xfs_mount *mp);
  55 void xfs_filestream_unmount(struct xfs_mount *mp);
  56 xfs_agnumber_t xfs_filestream_lookup_ag(struct xfs_inode *ip);
  57 int xfs_filestream_associate(struct xfs_inode *dip, struct xfs_inode *ip);
  58 void xfs_filestream_deassociate(struct xfs_inode *ip);
  59 int xfs_filestream_new_ag(struct xfs_bmalloca *ap, xfs_agnumber_t *agp);
  60
  61
  62 /* filestreams for the inode? */
  63 static inline int
  64 xfs_inode_is_filestream(
  65         struct xfs_inode        *ip)
  66 {
  67         return (ip->i_mount->m_flags & XFS_MOUNT_FILESTREAMS) ||
  68                 xfs_iflags_test(ip, XFS_IFILESTREAM) ||
  69                 (ip->i_d.di_flags & XFS_DIFLAG_FILESTREAM);
  70 }
  71
  72 #endif /* __KERNEL__ */
  73
  74 #endif /* __XFS_FILESTREAM_H__ */