diff options
Diffstat (limited to 'fs/ceph/cache.h')
-rw-r--r-- | fs/ceph/cache.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h new file mode 100644 index 000000000000..0ea95cb7f389 --- /dev/null +++ b/fs/ceph/cache.h | |||
@@ -0,0 +1,138 @@ | |||
1 | /* | ||
2 | * Ceph cache definitions. | ||
3 | * | ||
4 | * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. | ||
5 | * Written by Milosz Tanski (milosz@adfin.com) | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License version 2 | ||
9 | * as published by the Free Software Foundation. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License | ||
17 | * along with this program; if not, write to: | ||
18 | * Free Software Foundation | ||
19 | * 51 Franklin Street, Fifth Floor | ||
20 | * Boston, MA 02111-1301 USA | ||
21 | * | ||
22 | */ | ||
23 | |||
24 | #ifndef _CEPH_CACHE_H | ||
25 | #define _CEPH_CACHE_H | ||
26 | |||
27 | #ifdef CONFIG_CEPH_FSCACHE | ||
28 | |||
29 | int ceph_fscache_register(void); | ||
30 | void ceph_fscache_unregister(void); | ||
31 | |||
32 | int ceph_fscache_register_fs(struct ceph_fs_client* fsc); | ||
33 | void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc); | ||
34 | |||
35 | void ceph_fscache_inode_init(struct ceph_inode_info *ci); | ||
36 | void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc, | ||
37 | struct ceph_inode_info* ci); | ||
38 | void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci); | ||
39 | |||
40 | int ceph_readpage_from_fscache(struct inode *inode, struct page *page); | ||
41 | int ceph_readpages_from_fscache(struct inode *inode, | ||
42 | struct address_space *mapping, | ||
43 | struct list_head *pages, | ||
44 | unsigned *nr_pages); | ||
45 | void ceph_readpage_to_fscache(struct inode *inode, struct page *page); | ||
46 | void ceph_invalidate_fscache_page(struct inode* inode, struct page *page); | ||
47 | void ceph_queue_revalidate(struct inode *inode); | ||
48 | |||
49 | static inline void ceph_fscache_invalidate(struct inode *inode) | ||
50 | { | ||
51 | fscache_invalidate(ceph_inode(inode)->fscache); | ||
52 | } | ||
53 | |||
54 | static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) | ||
55 | { | ||
56 | struct inode* inode = page->mapping->host; | ||
57 | struct ceph_inode_info *ci = ceph_inode(inode); | ||
58 | return fscache_maybe_release_page(ci->fscache, page, gfp); | ||
59 | } | ||
60 | |||
61 | #else | ||
62 | |||
63 | static inline int ceph_fscache_register(void) | ||
64 | { | ||
65 | return 0; | ||
66 | } | ||
67 | |||
68 | static inline void ceph_fscache_unregister(void) | ||
69 | { | ||
70 | } | ||
71 | |||
72 | static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc) | ||
73 | { | ||
74 | return 0; | ||
75 | } | ||
76 | |||
77 | static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) | ||
78 | { | ||
79 | } | ||
80 | |||
81 | static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) | ||
82 | { | ||
83 | } | ||
84 | |||
85 | static inline void ceph_fscache_register_inode_cookie(struct ceph_fs_client* parent_fsc, | ||
86 | struct ceph_inode_info* ci) | ||
87 | { | ||
88 | } | ||
89 | |||
90 | static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) | ||
91 | { | ||
92 | } | ||
93 | |||
94 | static inline int ceph_readpage_from_fscache(struct inode* inode, | ||
95 | struct page *page) | ||
96 | { | ||
97 | return -ENOBUFS; | ||
98 | } | ||
99 | |||
100 | static inline int ceph_readpages_from_fscache(struct inode *inode, | ||
101 | struct address_space *mapping, | ||
102 | struct list_head *pages, | ||
103 | unsigned *nr_pages) | ||
104 | { | ||
105 | return -ENOBUFS; | ||
106 | } | ||
107 | |||
108 | static inline void ceph_readpage_to_fscache(struct inode *inode, | ||
109 | struct page *page) | ||
110 | { | ||
111 | } | ||
112 | |||
113 | static inline void ceph_fscache_invalidate(struct inode *inode) | ||
114 | { | ||
115 | } | ||
116 | |||
117 | static inline void ceph_invalidate_fscache_page(struct inode *inode, | ||
118 | struct page *page) | ||
119 | { | ||
120 | } | ||
121 | |||
122 | static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) | ||
123 | { | ||
124 | return 1; | ||
125 | } | ||
126 | |||
127 | static inline void ceph_fscache_readpages_cancel(struct inode *inode, | ||
128 | struct list_head *pages) | ||
129 | { | ||
130 | } | ||
131 | |||
132 | static inline void ceph_queue_revalidate(struct inode *inode) | ||
133 | { | ||
134 | } | ||
135 | |||
136 | #endif | ||
137 | |||
138 | #endif | ||