linux - fs/ceph/cache.h

117 lines · 2.8 KiB

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 ([email protected])
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
17	int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
18	void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
19
20	void ceph_fscache_register_inode_cookie(struct inode *inode);
21	void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
22
23	void ceph_fscache_use_cookie(struct inode *inode, bool will_modify);
24	void ceph_fscache_unuse_cookie(struct inode *inode, bool update);
25
26	void ceph_fscache_update(struct inode *inode);
27	void ceph_fscache_invalidate(struct inode *inode, bool dio_write);
28
29	static inline struct fscache_cookie ceph_fscache_cookie(struct ceph_inode_info ci)
30	{
31	return netfs_i_cookie(&ci->netfs);
32	}
33
34	static inline void ceph_fscache_resize(struct inode *inode, loff_t to, bool shrank)
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, true);
41	fscache_resize_cookie(cookie, to, shrank);
42	ceph_fscache_unuse_cookie(inode, true);
43	}
44	}
45
46	static 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
54	static 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 */
60	static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
61	struct fs_context *fc)
62	{
63	return 0;
64	}
65
66	static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
67	{
68	}
69
70	static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
71	{
72	}
73
74	static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
75	{
76	}
77
78	static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
79	{
80	}
81
82	static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
83	{
84	}
85
86	static inline void ceph_fscache_update(struct inode *inode)
87	{
88	}
89
90	static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
91	{
92	}
93
94	static inline struct fscache_cookie ceph_fscache_cookie(struct ceph_inode_info ci)
95	{
96	return NULL;
97	}
98
99	static inline void ceph_fscache_resize(struct inode *inode, loff_t to, bool shrank)
100	{
101	}
102
103	static 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
111	static inline bool ceph_is_cache_enabled(struct inode *inode)
112	{
113	return false;
114	}
115	#endif /* CONFIG_CEPH_FSCACHE */
116
117	#endif