2 * fs/cifs/fscache.h - CIFS filesystem cache interface definitions
4 * Copyright (c) 2010 Novell, Inc.
5 * Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
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.
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.
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
21 #ifndef _CIFS_FSCACHE_H
22 #define _CIFS_FSCACHE_H
24 #include <linux/fscache.h>
28 #ifdef CONFIG_CIFS_FSCACHE
30 extern struct fscache_netfs cifs_fscache_netfs;
31 extern const struct fscache_cookie_def cifs_fscache_server_index_def;
32 extern const struct fscache_cookie_def cifs_fscache_super_index_def;
33 extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
36 extern int cifs_fscache_register(void);
37 extern void cifs_fscache_unregister(void);
42 extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
43 extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
44 extern void cifs_fscache_get_super_cookie(struct cifsTconInfo *);
45 extern void cifs_fscache_release_super_cookie(struct cifsTconInfo *);
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 *);
51 extern void __cifs_fscache_invalidate_page(struct page *, struct inode *);
52 extern int cifs_fscache_release_page(struct page *page, gfp_t gfp);
54 extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
56 static inline void cifs_fscache_invalidate_page(struct page *page,
59 if (PageFsCache(page))
60 __cifs_fscache_invalidate_page(page, inode);
63 static inline void cifs_readpage_to_fscache(struct inode *inode,
66 if (PageFsCache(page))
67 __cifs_readpage_to_fscache(inode, page);
70 #else /* CONFIG_CIFS_FSCACHE */
71 static inline int cifs_fscache_register(void) { return 0; }
72 static inline void cifs_fscache_unregister(void) {}
75 cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
77 cifs_fscache_get_client_cookie(struct TCP_Server_Info *server); {}
78 static inline void cifs_fscache_get_super_cookie(struct cifsTconInfo *tcon) {}
80 cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon) {}
82 static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
83 static inline void cifs_fscache_set_inode_cookie(struct inode *inode,
85 static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {}
86 static inline void cifs_fscache_release_page(struct page *page, gfp_t gfp)
88 return 1; /* May release page */
91 static inline int cifs_fscache_invalidate_page(struct page *page,
93 static inline void cifs_readpage_to_fscache(struct inode *inode,
96 #endif /* CONFIG_CIFS_FSCACHE */
98 #endif /* _CIFS_FSCACHE_H */