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99ccbd22 MT |
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 | ||
971f0bde MT |
29 | extern struct fscache_netfs ceph_cache_netfs; |
30 | ||
99ccbd22 MT |
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 | ||
d4d3aa38 MT |
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 | ||
99ccbd22 MT |
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 | ||
3f42bc4b LW |
70 | static inline void ceph_fscache_readpage_cancel(struct inode *inode, |
71 | struct page *page) | |
72 | { | |
73 | struct ceph_inode_info *ci = ceph_inode(inode); | |
74 | if (fscache_cookie_valid(ci->fscache) && PageFsCache(page)) | |
75 | __fscache_uncache_page(ci->fscache, page); | |
76 | } | |
77 | ||
76be778b MT |
78 | static inline void ceph_fscache_readpages_cancel(struct inode *inode, |
79 | struct list_head *pages) | |
80 | { | |
81 | struct ceph_inode_info *ci = ceph_inode(inode); | |
82 | return fscache_readpages_cancel(ci->fscache, pages); | |
83 | } | |
84 | ||
99ccbd22 MT |
85 | #else |
86 | ||
87 | static inline int ceph_fscache_register(void) | |
88 | { | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static inline void ceph_fscache_unregister(void) | |
93 | { | |
94 | } | |
95 | ||
96 | static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc) | |
97 | { | |
98 | return 0; | |
99 | } | |
100 | ||
101 | static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) | |
102 | { | |
103 | } | |
104 | ||
105 | static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) | |
106 | { | |
107 | } | |
108 | ||
109 | static inline void ceph_fscache_register_inode_cookie(struct ceph_fs_client* parent_fsc, | |
110 | struct ceph_inode_info* ci) | |
111 | { | |
112 | } | |
113 | ||
d4d3aa38 MT |
114 | static inline void ceph_fscache_uncache_page(struct inode *inode, |
115 | struct page *pages) | |
99ccbd22 MT |
116 | { |
117 | } | |
118 | ||
119 | static inline int ceph_readpage_from_fscache(struct inode* inode, | |
120 | struct page *page) | |
121 | { | |
122 | return -ENOBUFS; | |
123 | } | |
124 | ||
125 | static inline int ceph_readpages_from_fscache(struct inode *inode, | |
126 | struct address_space *mapping, | |
127 | struct list_head *pages, | |
128 | unsigned *nr_pages) | |
129 | { | |
130 | return -ENOBUFS; | |
131 | } | |
132 | ||
133 | static inline void ceph_readpage_to_fscache(struct inode *inode, | |
134 | struct page *page) | |
135 | { | |
136 | } | |
137 | ||
138 | static inline void ceph_fscache_invalidate(struct inode *inode) | |
139 | { | |
140 | } | |
141 | ||
142 | static inline void ceph_invalidate_fscache_page(struct inode *inode, | |
143 | struct page *page) | |
144 | { | |
145 | } | |
146 | ||
d4d3aa38 MT |
147 | static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) |
148 | { | |
149 | } | |
150 | ||
99ccbd22 MT |
151 | static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) |
152 | { | |
153 | return 1; | |
154 | } | |
155 | ||
3f42bc4b LW |
156 | static inline void ceph_fscache_readpage_cancel(struct inode *inode, |
157 | struct page *page) | |
158 | { | |
159 | } | |
160 | ||
99ccbd22 MT |
161 | static inline void ceph_fscache_readpages_cancel(struct inode *inode, |
162 | struct list_head *pages) | |
163 | { | |
164 | } | |
165 | ||
166 | static inline void ceph_queue_revalidate(struct inode *inode) | |
167 | { | |
168 | } | |
169 | ||
170 | #endif | |
171 | ||
172 | #endif |