Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
14extern struct fscache_netfs ceph_cache_netfs;
15
16int ceph_fscache_register(void);
17void ceph_fscache_unregister(void);
18
19int ceph_fscache_register_fs(struct ceph_fs_client* fsc);
20void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
21
22void ceph_fscache_register_inode_cookie(struct inode *inode);
23void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
24void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp);
25void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci);
26
27int ceph_readpage_from_fscache(struct inode *inode, struct page *page);
28int ceph_readpages_from_fscache(struct inode *inode,
29 struct address_space *mapping,
30 struct list_head *pages,
31 unsigned *nr_pages);
32void ceph_readpage_to_fscache(struct inode *inode, struct page *page);
33void ceph_invalidate_fscache_page(struct inode* inode, struct page *page);
34
35static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
36{
37 ci->fscache = NULL;
38 ci->i_fscache_gen = 0;
39}
40
41static inline void ceph_fscache_invalidate(struct inode *inode)
42{
43 fscache_invalidate(ceph_inode(inode)->fscache);
44}
45
46static 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
53static 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
60static 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
68static 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
75static 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
82static inline int ceph_fscache_register(void)
83{
84 return 0;
85}
86
87static inline void ceph_fscache_unregister(void)
88{
89}
90
91static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc)
92{
93 return 0;
94}
95
96static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
97{
98}
99
100static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
101{
102}
103
104static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
105{
106}
107
108static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
109{
110}
111
112static inline void ceph_fscache_file_set_cookie(struct inode *inode,
113 struct file *filp)
114{
115}
116
117static inline void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci)
118{
119}
120
121static inline void ceph_fscache_uncache_page(struct inode *inode,
122 struct page *pages)
123{
124}
125
126static inline int ceph_readpage_from_fscache(struct inode* inode,
127 struct page *page)
128{
129 return -ENOBUFS;
130}
131
132static inline int ceph_readpages_from_fscache(struct inode *inode,
133 struct address_space *mapping,
134 struct list_head *pages,
135 unsigned *nr_pages)
136{
137 return -ENOBUFS;
138}
139
140static inline void ceph_readpage_to_fscache(struct inode *inode,
141 struct page *page)
142{
143}
144
145static inline void ceph_fscache_invalidate(struct inode *inode)
146{
147}
148
149static inline void ceph_invalidate_fscache_page(struct inode *inode,
150 struct page *page)
151{
152}
153
154static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
155{
156 return 1;
157}
158
159static inline void ceph_fscache_readpage_cancel(struct inode *inode,
160 struct page *page)
161{
162}
163
164static inline void ceph_fscache_readpages_cancel(struct inode *inode,
165 struct list_head *pages)
166{
167}
168
169static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
170{
171}
172
173#endif
174
175#endif