Linux kernel mirror (for testing)
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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#include <linux/netfs.h>
13
14#ifdef CONFIG_CEPH_FSCACHE
15
16extern struct fscache_netfs ceph_cache_netfs;
17
18int ceph_fscache_register(void);
19void ceph_fscache_unregister(void);
20
21int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
22void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
23
24void ceph_fscache_register_inode_cookie(struct inode *inode);
25void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
26void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp);
27void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci);
28
29int ceph_readpage_from_fscache(struct inode *inode, struct page *page);
30int ceph_readpages_from_fscache(struct inode *inode,
31 struct address_space *mapping,
32 struct list_head *pages,
33 unsigned *nr_pages);
34
35static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
36{
37 ci->fscache = NULL;
38}
39
40static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
41{
42 return ci->fscache;
43}
44
45static inline void ceph_fscache_invalidate(struct inode *inode)
46{
47 fscache_invalidate(ceph_inode(inode)->fscache);
48}
49
50static inline bool ceph_is_cache_enabled(struct inode *inode)
51{
52 struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(inode));
53
54 if (!cookie)
55 return false;
56 return fscache_cookie_enabled(cookie);
57}
58
59static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
60{
61 struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));
62
63 return fscache_begin_read_operation(rreq, cookie);
64}
65#else
66
67static inline int ceph_fscache_register(void)
68{
69 return 0;
70}
71
72static inline void ceph_fscache_unregister(void)
73{
74}
75
76static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
77 struct fs_context *fc)
78{
79 return 0;
80}
81
82static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
83{
84}
85
86static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
87{
88}
89
90static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
91{
92 return NULL;
93}
94
95static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
96{
97}
98
99static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
100{
101}
102
103static inline void ceph_fscache_file_set_cookie(struct inode *inode,
104 struct file *filp)
105{
106}
107
108static inline void ceph_fscache_invalidate(struct inode *inode)
109{
110}
111
112static inline bool ceph_is_cache_enabled(struct inode *inode)
113{
114 return false;
115}
116
117static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
118{
119 return -ENOBUFS;
120}
121#endif
122
123#endif /* _CEPH_CACHE_H */