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Diffstat (limited to 'fs/ceph/cache.h')
-rw-r--r-- | fs/ceph/cache.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h new file mode 100644 index 000000000000..ba949408a336 --- /dev/null +++ b/fs/ceph/cache.h | |||
@@ -0,0 +1,159 @@ | |||
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 | extern struct fscache_netfs ceph_cache_netfs; | ||
30 | |||
31 | int ceph_fscache_register(void); | ||
32 | void ceph_fscache_unregister(void); | ||
33 | |||
34 | int ceph_fscache_register_fs(struct ceph_fs_client* fsc); | ||
35 | void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc); | ||
36 | |||
37 | void ceph_fscache_inode_init(struct ceph_inode_info *ci); | ||
38 | void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc, | ||
39 | struct ceph_inode_info* ci); | ||
40 | void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci); | ||
41 | |||
42 | int ceph_readpage_from_fscache(struct inode *inode, struct page *page); | ||
43 | int ceph_readpages_from_fscache(struct inode *inode, | ||
44 | struct address_space *mapping, | ||
45 | struct list_head *pages, | ||
46 | unsigned *nr_pages); | ||
47 | void ceph_readpage_to_fscache(struct inode *inode, struct page *page); | ||
48 | void ceph_invalidate_fscache_page(struct inode* inode, struct page *page); | ||
49 | void ceph_queue_revalidate(struct inode *inode); | ||
50 | |||
51 | static inline void ceph_fscache_invalidate(struct inode *inode) | ||
52 | { | ||
53 | fscache_invalidate(ceph_inode(inode)->fscache); | ||
54 | } | ||
55 | |||
56 | static inline void ceph_fscache_uncache_page(struct inode *inode, | ||
57 | struct page *page) | ||
58 | { | ||
59 | struct ceph_inode_info *ci = ceph_inode(inode); | ||
60 | return fscache_uncache_page(ci->fscache, page); | ||
61 | } | ||
62 | |||
63 | static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) | ||
64 | { | ||
65 | struct inode* inode = page->mapping->host; | ||
66 | struct ceph_inode_info *ci = ceph_inode(inode); | ||
67 | return fscache_maybe_release_page(ci->fscache, page, gfp); | ||
68 | } | ||
69 | |||
70 | static inline void ceph_fscache_readpages_cancel(struct inode *inode, | ||
71 | struct list_head *pages) | ||
72 | { | ||
73 | struct ceph_inode_info *ci = ceph_inode(inode); | ||
74 | return fscache_readpages_cancel(ci->fscache, pages); | ||
75 | } | ||
76 | |||
77 | #else | ||
78 | |||
79 | static inline int ceph_fscache_register(void) | ||
80 | { | ||
81 | return 0; | ||
82 | } | ||
83 | |||
84 | static inline void ceph_fscache_unregister(void) | ||
85 | { | ||
86 | } | ||
87 | |||
88 | static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc) | ||
89 | { | ||
90 | return 0; | ||
91 | } | ||
92 | |||
93 | static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) | ||
94 | { | ||
95 | } | ||
96 | |||
97 | static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) | ||
98 | { | ||
99 | } | ||
100 | |||
101 | static inline void ceph_fscache_register_inode_cookie(struct ceph_fs_client* parent_fsc, | ||
102 | struct ceph_inode_info* ci) | ||
103 | { | ||
104 | } | ||
105 | |||
106 | static inline void ceph_fscache_uncache_page(struct inode *inode, | ||
107 | struct page *pages) | ||
108 | { | ||
109 | } | ||
110 | |||
111 | static inline int ceph_readpage_from_fscache(struct inode* inode, | ||
112 | struct page *page) | ||
113 | { | ||
114 | return -ENOBUFS; | ||
115 | } | ||
116 | |||
117 | static inline int ceph_readpages_from_fscache(struct inode *inode, | ||
118 | struct address_space *mapping, | ||
119 | struct list_head *pages, | ||
120 | unsigned *nr_pages) | ||
121 | { | ||
122 | return -ENOBUFS; | ||
123 | } | ||
124 | |||
125 | static inline void ceph_readpage_to_fscache(struct inode *inode, | ||
126 | struct page *page) | ||
127 | { | ||
128 | } | ||
129 | |||
130 | static inline void ceph_fscache_invalidate(struct inode *inode) | ||
131 | { | ||
132 | } | ||
133 | |||
134 | static inline void ceph_invalidate_fscache_page(struct inode *inode, | ||
135 | struct page *page) | ||
136 | { | ||
137 | } | ||
138 | |||
139 | static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) | ||
140 | { | ||
141 | } | ||
142 | |||
143 | static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) | ||
144 | { | ||
145 | return 1; | ||
146 | } | ||
147 | |||
148 | static inline void ceph_fscache_readpages_cancel(struct inode *inode, | ||
149 | struct list_head *pages) | ||
150 | { | ||
151 | } | ||
152 | |||
153 | static inline void ceph_queue_revalidate(struct inode *inode) | ||
154 | { | ||
155 | } | ||
156 | |||
157 | #endif | ||
158 | |||
159 | #endif | ||