summaryrefslogtreecommitdiffstats
path: root/fs/ceph/cache.h
blob: dc502daac49ab580380deca8f969b3f648a4c299 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Ceph cache definitions.
 *
 *  Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
 *  Written by Milosz Tanski (milosz@adfin.com)
 */

#ifndef _CEPH_CACHE_H
#define _CEPH_CACHE_H

#include <linux/netfs.h>

#ifdef CONFIG_CEPH_FSCACHE
#include <linux/fscache.h>

int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);

void ceph_fscache_register_inode_cookie(struct inode *inode);
void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);

void ceph_fscache_use_cookie(struct inode *inode, bool will_modify);
void ceph_fscache_unuse_cookie(struct inode *inode, bool update);

void ceph_fscache_update(struct inode *inode);
void ceph_fscache_invalidate(struct inode *inode, bool dio_write);

static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
{
	return netfs_i_cookie(&ci->netfs);
}

static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	struct fscache_cookie *cookie = ceph_fscache_cookie(ci);

	if (cookie) {
		ceph_fscache_use_cookie(inode, true);
		fscache_resize_cookie(cookie, to);
		ceph_fscache_unuse_cookie(inode, true);
	}
}

static inline void ceph_fscache_unpin_writeback(struct inode *inode,
						struct writeback_control *wbc)
{
	fscache_unpin_writeback(wbc, ceph_fscache_cookie(ceph_inode(inode)));
}

static inline int ceph_fscache_dirty_folio(struct address_space *mapping,
		struct folio *folio)
{
	struct ceph_inode_info *ci = ceph_inode(mapping->host);

	return fscache_dirty_folio(mapping, folio, ceph_fscache_cookie(ci));
}

static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq)
{
	struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));

	return fscache_begin_read_operation(&rreq->cache_resources, cookie);
}

static inline bool ceph_is_cache_enabled(struct inode *inode)
{
	return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
}

static inline void ceph_fscache_note_page_release(struct inode *inode)
{
	struct ceph_inode_info *ci = ceph_inode(inode);

	fscache_note_page_release(ceph_fscache_cookie(ci));
}
#else /* CONFIG_CEPH_FSCACHE */
static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
					   struct fs_context *fc)
{
	return 0;
}

static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
{
}

static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
{
}

static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
{
}

static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
{
}

static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
{
}

static inline void ceph_fscache_update(struct inode *inode)
{
}

static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
{
}

static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
{
	return NULL;
}

static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
{
}

static inline void ceph_fscache_unpin_writeback(struct inode *inode,
						struct writeback_control *wbc)
{
}

static inline int ceph_fscache_dirty_folio(struct address_space *mapping,
		struct folio *folio)
{
	return filemap_dirty_folio(mapping, folio);
}

static inline bool ceph_is_cache_enabled(struct inode *inode)
{
	return false;
}

static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq)
{
	return -ENOBUFS;
}

static inline void ceph_fscache_note_page_release(struct inode *inode)
{
}
#endif /* CONFIG_CEPH_FSCACHE */

#endif