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#include <linux/fscache.h>
16
17int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
18void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
19
20void ceph_fscache_register_inode_cookie(struct inode *inode);
21void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
22
23void ceph_fscache_use_cookie(struct inode *inode, bool will_modify);
24void ceph_fscache_unuse_cookie(struct inode *inode, bool update);
25
26void ceph_fscache_update(struct inode *inode);
27void ceph_fscache_invalidate(struct inode *inode, bool dio_write);
28
29static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
30{
31 return netfs_i_cookie(ctx: &ci->netfs);
32}
33
34static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
35{
36 struct ceph_inode_info *ci = ceph_inode(inode);
37 struct fscache_cookie *cookie = ceph_fscache_cookie(ci);
38
39 if (cookie) {
40 ceph_fscache_use_cookie(inode, will_modify: true);
41 fscache_resize_cookie(cookie, new_size: to);
42 ceph_fscache_unuse_cookie(inode, update: true);
43 }
44}
45
46static inline int ceph_fscache_unpin_writeback(struct inode *inode,
47 struct writeback_control *wbc)
48{
49 return netfs_unpin_writeback(inode, wbc);
50}
51
52#define ceph_fscache_dirty_folio netfs_dirty_folio
53
54static inline bool ceph_is_cache_enabled(struct inode *inode)
55{
56 return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
57}
58
59#else /* CONFIG_CEPH_FSCACHE */
60static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
61 struct fs_context *fc)
62{
63 return 0;
64}
65
66static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
67{
68}
69
70static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
71{
72}
73
74static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
75{
76}
77
78static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
79{
80}
81
82static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
83{
84}
85
86static inline void ceph_fscache_update(struct inode *inode)
87{
88}
89
90static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
91{
92}
93
94static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
95{
96 return NULL;
97}
98
99static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
100{
101}
102
103static inline int ceph_fscache_unpin_writeback(struct inode *inode,
104 struct writeback_control *wbc)
105{
106 return 0;
107}
108
109#define ceph_fscache_dirty_folio filemap_dirty_folio
110
111static inline bool ceph_is_cache_enabled(struct inode *inode)
112{
113 return false;
114}
115#endif /* CONFIG_CEPH_FSCACHE */
116
117#endif
118

source code of linux/fs/ceph/cache.h