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f579cf3c SJ |
1 | /* |
2 | * fs/cifs/fscache.h - CIFS filesystem cache interface definitions | |
3 | * | |
4 | * Copyright (c) 2010 Novell, Inc. | |
5 | * Authors(s): Suresh Jayaraman (sjayaraman@suse.de> | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #ifndef _CIFS_FSCACHE_H | |
22 | #define _CIFS_FSCACHE_H | |
23 | ||
24 | #include <linux/fscache.h> | |
25 | ||
488f1d2d SJ |
26 | #include "cifsglob.h" |
27 | ||
f579cf3c SJ |
28 | #ifdef CONFIG_CIFS_FSCACHE |
29 | ||
30 | extern struct fscache_netfs cifs_fscache_netfs; | |
488f1d2d | 31 | extern const struct fscache_cookie_def cifs_fscache_server_index_def; |
d03382ce | 32 | extern const struct fscache_cookie_def cifs_fscache_super_index_def; |
9451a9a5 SJ |
33 | extern const struct fscache_cookie_def cifs_fscache_inode_object_def; |
34 | ||
f579cf3c SJ |
35 | |
36 | extern int cifs_fscache_register(void); | |
37 | extern void cifs_fscache_unregister(void); | |
38 | ||
488f1d2d SJ |
39 | /* |
40 | * fscache.c | |
41 | */ | |
42 | extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *); | |
43 | extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *); | |
d03382ce SJ |
44 | extern void cifs_fscache_get_super_cookie(struct cifsTconInfo *); |
45 | extern void cifs_fscache_release_super_cookie(struct cifsTconInfo *); | |
488f1d2d | 46 | |
9451a9a5 SJ |
47 | extern void cifs_fscache_release_inode_cookie(struct inode *); |
48 | extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *); | |
49 | extern void cifs_fscache_reset_inode_cookie(struct inode *); | |
50 | ||
85f2d6b4 SJ |
51 | extern void __cifs_fscache_invalidate_page(struct page *, struct inode *); |
52 | extern int cifs_fscache_release_page(struct page *page, gfp_t gfp); | |
53 | ||
54 | static inline void cifs_fscache_invalidate_page(struct page *page, | |
55 | struct inode *inode) | |
56 | { | |
57 | if (PageFsCache(page)) | |
58 | __cifs_fscache_invalidate_page(page, inode); | |
59 | } | |
60 | ||
f579cf3c SJ |
61 | #else /* CONFIG_CIFS_FSCACHE */ |
62 | static inline int cifs_fscache_register(void) { return 0; } | |
63 | static inline void cifs_fscache_unregister(void) {} | |
64 | ||
488f1d2d SJ |
65 | static inline void |
66 | cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {} | |
67 | static inline void | |
68 | cifs_fscache_get_client_cookie(struct TCP_Server_Info *server); {} | |
d03382ce SJ |
69 | static inline void cifs_fscache_get_super_cookie(struct cifsTconInfo *tcon) {} |
70 | static inline void | |
71 | cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon) {} | |
488f1d2d | 72 | |
9451a9a5 SJ |
73 | static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {} |
74 | static inline void cifs_fscache_set_inode_cookie(struct inode *inode, | |
75 | struct file *filp) {} | |
76 | static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {} | |
85f2d6b4 SJ |
77 | static inline void cifs_fscache_release_page(struct page *page, gfp_t gfp) |
78 | { | |
79 | return 1; /* May release page */ | |
80 | } | |
9451a9a5 | 81 | |
85f2d6b4 SJ |
82 | static inline int cifs_fscache_invalidate_page(struct page *page, |
83 | struct inode *) {} | |
9451a9a5 | 84 | |
f579cf3c SJ |
85 | #endif /* CONFIG_CIFS_FSCACHE */ |
86 | ||
87 | #endif /* _CIFS_FSCACHE_H */ |