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xfs_filestream.h
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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__ */
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