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gerrit-public.fairphone.software / kernel / msm-4.9 / 9dc06558c223bbc08290917ac44c25963bc09e43 / . / fs / cifs / fscache.h
blob: 1a00d70bca979dc9ee90635e60489b06a386ec37 [file] [log] [blame]
Suresh Jayaramanf579cf32010-07-05 18:11:50 +0530[diff] [blame]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
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530[diff] [blame]26#include "cifsglob.h"
27
Suresh Jayaramanf579cf32010-07-05 18:11:50 +0530[diff] [blame]28#ifdef CONFIG_CIFS_FSCACHE
29
30extern struct fscache_netfs cifs_fscache_netfs;
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530[diff] [blame]31extern const struct fscache_cookie_def cifs_fscache_server_index_def;
Suresh Jayaramand03382c2010-07-05 18:12:27 +0530[diff] [blame]32extern const struct fscache_cookie_def cifs_fscache_super_index_def;
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530[diff] [blame]33extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
34
Suresh Jayaramanf579cf32010-07-05 18:11:50 +0530[diff] [blame]35
36extern int cifs_fscache_register(void);
37extern void cifs_fscache_unregister(void);
38
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530[diff] [blame]39/*
40 * fscache.c
41 */
42extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
43extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
Suresh Jayaramand03382c2010-07-05 18:12:27 +0530[diff] [blame]44extern void cifs_fscache_get_super_cookie(struct cifsTconInfo *);
45extern void cifs_fscache_release_super_cookie(struct cifsTconInfo *);
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530[diff] [blame]46
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530[diff] [blame]47extern void cifs_fscache_release_inode_cookie(struct inode *);
48extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *);
49extern void cifs_fscache_reset_inode_cookie(struct inode *);
50
Suresh Jayaraman85f2d6b2010-07-05 18:13:00 +0530[diff] [blame]51extern void __cifs_fscache_invalidate_page(struct page *, struct inode *);
52extern int cifs_fscache_release_page(struct page *page, gfp_t gfp);
53
Suresh Jayaraman9dc06552010-07-05 18:13:11 +0530[diff] [blame^]54extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
55
Suresh Jayaraman85f2d6b2010-07-05 18:13:00 +0530[diff] [blame]56static inline void cifs_fscache_invalidate_page(struct page *page,
57 struct inode *inode)
58{
59 if (PageFsCache(page))
60 __cifs_fscache_invalidate_page(page, inode);
61}
62
Suresh Jayaraman9dc06552010-07-05 18:13:11 +0530[diff] [blame^]63static inline void cifs_readpage_to_fscache(struct inode *inode,
64 struct page *page)
65{
66 if (PageFsCache(page))
67 __cifs_readpage_to_fscache(inode, page);
68}
69
Suresh Jayaramanf579cf32010-07-05 18:11:50 +0530[diff] [blame]70#else /* CONFIG_CIFS_FSCACHE */
71static inline int cifs_fscache_register(void) { return 0; }
72static inline void cifs_fscache_unregister(void) {}
73
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530[diff] [blame]74static inline void
75cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
76static inline void
77cifs_fscache_get_client_cookie(struct TCP_Server_Info *server); {}
Suresh Jayaramand03382c2010-07-05 18:12:27 +0530[diff] [blame]78static inline void cifs_fscache_get_super_cookie(struct cifsTconInfo *tcon) {}
79static inline void
80cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon) {}
Suresh Jayaraman488f1d2d2010-07-05 18:12:15 +0530[diff] [blame]81
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530[diff] [blame]82static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
83static inline void cifs_fscache_set_inode_cookie(struct inode *inode,
84 struct file *filp) {}
85static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {}
Suresh Jayaraman85f2d6b2010-07-05 18:13:00 +0530[diff] [blame]86static inline void cifs_fscache_release_page(struct page *page, gfp_t gfp)
87{
88 return 1; /* May release page */
89}
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530[diff] [blame]90
Suresh Jayaraman85f2d6b2010-07-05 18:13:00 +0530[diff] [blame]91static inline int cifs_fscache_invalidate_page(struct page *page,
92 struct inode *) {}
Suresh Jayaraman9dc06552010-07-05 18:13:11 +0530[diff] [blame^]93static inline void cifs_readpage_to_fscache(struct inode *inode,
94 struct page *page) {}
Suresh Jayaraman9451a9a2010-07-05 18:12:45 +0530[diff] [blame]95
Suresh Jayaramanf579cf32010-07-05 18:11:50 +0530[diff] [blame]96#endif /* CONFIG_CIFS_FSCACHE */
97
98#endif /* _CIFS_FSCACHE_H */