1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Ceph cache definitions.
4 *
5 * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
6 * Written by Milosz Tanski (milosz@adfin.com)
7 */
8
9 #ifndef _CEPH_CACHE_H
10 #define _CEPH_CACHE_H
11
12 #ifdef CONFIG_CEPH_FSCACHE
13
14 extern struct fscache_netfs ceph_cache_netfs;
15
16 int ceph_fscache_register(void);
17 void ceph_fscache_unregister(void);
18
19 int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
20 void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
21
22 void ceph_fscache_register_inode_cookie(struct inode *inode);
23 void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
24 void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp);
25 void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci);
26
27 int ceph_readpage_from_fscache(struct inode *inode, struct page *page);
28 int ceph_readpages_from_fscache(struct inode *inode,
29 struct address_space *mapping,
30 struct list_head *pages,
31 unsigned *nr_pages);
32 void ceph_readpage_to_fscache(struct inode *inode, struct page *page);
33 void ceph_invalidate_fscache_page(struct inode* inode, struct page *page);
34
ceph_fscache_inode_init(struct ceph_inode_info * ci)35 static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
36 {
37 ci->fscache = NULL;
38 ci->i_fscache_gen = 0;
39 }
40
ceph_fscache_invalidate(struct inode * inode)41 static inline void ceph_fscache_invalidate(struct inode *inode)
42 {
43 fscache_invalidate(ceph_inode(inode)->fscache);
44 }
45
ceph_fscache_uncache_page(struct inode * inode,struct page * page)46 static inline void ceph_fscache_uncache_page(struct inode *inode,
47 struct page *page)
48 {
49 struct ceph_inode_info *ci = ceph_inode(inode);
50 return fscache_uncache_page(ci->fscache, page);
51 }
52
ceph_release_fscache_page(struct page * page,gfp_t gfp)53 static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
54 {
55 struct inode* inode = page->mapping->host;
56 struct ceph_inode_info *ci = ceph_inode(inode);
57 return fscache_maybe_release_page(ci->fscache, page, gfp);
58 }
59
ceph_fscache_readpage_cancel(struct inode * inode,struct page * page)60 static inline void ceph_fscache_readpage_cancel(struct inode *inode,
61 struct page *page)
62 {
63 struct ceph_inode_info *ci = ceph_inode(inode);
64 if (fscache_cookie_valid(ci->fscache) && PageFsCache(page))
65 __fscache_uncache_page(ci->fscache, page);
66 }
67
ceph_fscache_readpages_cancel(struct inode * inode,struct list_head * pages)68 static inline void ceph_fscache_readpages_cancel(struct inode *inode,
69 struct list_head *pages)
70 {
71 struct ceph_inode_info *ci = ceph_inode(inode);
72 return fscache_readpages_cancel(ci->fscache, pages);
73 }
74
ceph_disable_fscache_readpage(struct ceph_inode_info * ci)75 static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
76 {
77 ci->i_fscache_gen = ci->i_rdcache_gen - 1;
78 }
79
80 #else
81
ceph_fscache_register(void)82 static inline int ceph_fscache_register(void)
83 {
84 return 0;
85 }
86
ceph_fscache_unregister(void)87 static inline void ceph_fscache_unregister(void)
88 {
89 }
90
ceph_fscache_register_fs(struct ceph_fs_client * fsc,struct fs_context * fc)91 static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
92 struct fs_context *fc)
93 {
94 return 0;
95 }
96
ceph_fscache_unregister_fs(struct ceph_fs_client * fsc)97 static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
98 {
99 }
100
ceph_fscache_inode_init(struct ceph_inode_info * ci)101 static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
102 {
103 }
104
ceph_fscache_register_inode_cookie(struct inode * inode)105 static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
106 {
107 }
108
ceph_fscache_unregister_inode_cookie(struct ceph_inode_info * ci)109 static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
110 {
111 }
112
ceph_fscache_file_set_cookie(struct inode * inode,struct file * filp)113 static inline void ceph_fscache_file_set_cookie(struct inode *inode,
114 struct file *filp)
115 {
116 }
117
ceph_fscache_revalidate_cookie(struct ceph_inode_info * ci)118 static inline void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci)
119 {
120 }
121
ceph_fscache_uncache_page(struct inode * inode,struct page * pages)122 static inline void ceph_fscache_uncache_page(struct inode *inode,
123 struct page *pages)
124 {
125 }
126
ceph_readpage_from_fscache(struct inode * inode,struct page * page)127 static inline int ceph_readpage_from_fscache(struct inode* inode,
128 struct page *page)
129 {
130 return -ENOBUFS;
131 }
132
ceph_readpages_from_fscache(struct inode * inode,struct address_space * mapping,struct list_head * pages,unsigned * nr_pages)133 static inline int ceph_readpages_from_fscache(struct inode *inode,
134 struct address_space *mapping,
135 struct list_head *pages,
136 unsigned *nr_pages)
137 {
138 return -ENOBUFS;
139 }
140
ceph_readpage_to_fscache(struct inode * inode,struct page * page)141 static inline void ceph_readpage_to_fscache(struct inode *inode,
142 struct page *page)
143 {
144 }
145
ceph_fscache_invalidate(struct inode * inode)146 static inline void ceph_fscache_invalidate(struct inode *inode)
147 {
148 }
149
ceph_invalidate_fscache_page(struct inode * inode,struct page * page)150 static inline void ceph_invalidate_fscache_page(struct inode *inode,
151 struct page *page)
152 {
153 }
154
ceph_release_fscache_page(struct page * page,gfp_t gfp)155 static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
156 {
157 return 1;
158 }
159
ceph_fscache_readpage_cancel(struct inode * inode,struct page * page)160 static inline void ceph_fscache_readpage_cancel(struct inode *inode,
161 struct page *page)
162 {
163 }
164
ceph_fscache_readpages_cancel(struct inode * inode,struct list_head * pages)165 static inline void ceph_fscache_readpages_cancel(struct inode *inode,
166 struct list_head *pages)
167 {
168 }
169
ceph_disable_fscache_readpage(struct ceph_inode_info * ci)170 static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
171 {
172 }
173
174 #endif
175
176 #endif
177