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#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
29static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
30{
31 ci->fscache = NULL;
32}
33
34static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
35{
36 return ci->fscache;
37}
38
39static inline void ceph_fscache_invalidate(struct inode *inode)
40{
41 fscache_invalidate(ceph_inode(inode)->fscache);
42}
43
44static inline bool ceph_is_cache_enabled(struct inode *inode)
45{
46 struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(inode));
47
48 if (!cookie)
49 return false;
50 return fscache_cookie_enabled(cookie);
51}
52
53static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
54{
55 struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));
56
57 return fscache_begin_read_operation(rreq, cookie);
58}
59#else
60
61static inline int ceph_fscache_register(void)
62{
63 return 0;
64}
65
66static inline void ceph_fscache_unregister(void)
67{
68}
69
70static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
71 struct fs_context *fc)
72{
73 return 0;
74}
75
76static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
77{
78}
79
80static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
81{
82}
83
84static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
85{
86 return NULL;
87}
88
89static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
90{
91}
92
93static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
94{
95}
96
97static inline void ceph_fscache_file_set_cookie(struct inode *inode,
98 struct file *filp)
99{
100}
101
102static inline void ceph_fscache_invalidate(struct inode *inode)
103{
104}
105
106static inline bool ceph_is_cache_enabled(struct inode *inode)
107{
108 return false;
109}
110
111static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
112{
113 return -ENOBUFS;
114}
115#endif
116
117#endif /* _CEPH_CACHE_H */