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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#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(&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, true);
41 fscache_resize_cookie(cookie, to);
42 ceph_fscache_unuse_cookie(inode, true);
43 }
44}
45
46static inline void ceph_fscache_unpin_writeback(struct inode *inode,
47 struct writeback_control *wbc)
48{
49 fscache_unpin_writeback(wbc, ceph_fscache_cookie(ceph_inode(inode)));
50}
51
52static inline int ceph_fscache_dirty_folio(struct address_space *mapping,
53 struct folio *folio)
54{
55 struct ceph_inode_info *ci = ceph_inode(mapping->host);
56
57 return fscache_dirty_folio(mapping, folio, ceph_fscache_cookie(ci));
58}
59
60static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq)
61{
62 struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));
63
64 return fscache_begin_read_operation(&rreq->cache_resources, cookie);
65}
66
67static inline bool ceph_is_cache_enabled(struct inode *inode)
68{
69 return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
70}
71
72static inline void ceph_fscache_note_page_release(struct inode *inode)
73{
74 struct ceph_inode_info *ci = ceph_inode(inode);
75
76 fscache_note_page_release(ceph_fscache_cookie(ci));
77}
78#else /* CONFIG_CEPH_FSCACHE */
79static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
80 struct fs_context *fc)
81{
82 return 0;
83}
84
85static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
86{
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_use_cookie(struct inode *inode, bool will_modify)
98{
99}
100
101static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
102{
103}
104
105static inline void ceph_fscache_update(struct inode *inode)
106{
107}
108
109static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
110{
111}
112
113static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
114{
115 return NULL;
116}
117
118static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
119{
120}
121
122static inline void ceph_fscache_unpin_writeback(struct inode *inode,
123 struct writeback_control *wbc)
124{
125}
126
127static inline int ceph_fscache_dirty_folio(struct address_space *mapping,
128 struct folio *folio)
129{
130 return filemap_dirty_folio(mapping, folio);
131}
132
133static inline bool ceph_is_cache_enabled(struct inode *inode)
134{
135 return false;
136}
137
138static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq)
139{
140 return -ENOBUFS;
141}
142
143static inline void ceph_fscache_note_page_release(struct inode *inode)
144{
145}
146#endif /* CONFIG_CEPH_FSCACHE */
147
148#endif
1/*
2 * Ceph cache definitions.
3 *
4 * Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
5 * Written by Milosz Tanski (milosz@adfin.com)
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to:
18 * Free Software Foundation
19 * 51 Franklin Street, Fifth Floor
20 * Boston, MA 02111-1301 USA
21 *
22 */
23
24#ifndef _CEPH_CACHE_H
25#define _CEPH_CACHE_H
26
27#ifdef CONFIG_CEPH_FSCACHE
28
29extern struct fscache_netfs ceph_cache_netfs;
30
31int ceph_fscache_register(void);
32void ceph_fscache_unregister(void);
33
34int ceph_fscache_register_fs(struct ceph_fs_client* fsc);
35void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
36
37void ceph_fscache_register_inode_cookie(struct inode *inode);
38void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
39void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp);
40void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci);
41
42int ceph_readpage_from_fscache(struct inode *inode, struct page *page);
43int ceph_readpages_from_fscache(struct inode *inode,
44 struct address_space *mapping,
45 struct list_head *pages,
46 unsigned *nr_pages);
47void ceph_readpage_to_fscache(struct inode *inode, struct page *page);
48void ceph_invalidate_fscache_page(struct inode* inode, struct page *page);
49
50static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
51{
52 ci->fscache = NULL;
53 ci->i_fscache_gen = 0;
54}
55
56static inline void ceph_fscache_invalidate(struct inode *inode)
57{
58 fscache_invalidate(ceph_inode(inode)->fscache);
59}
60
61static inline void ceph_fscache_uncache_page(struct inode *inode,
62 struct page *page)
63{
64 struct ceph_inode_info *ci = ceph_inode(inode);
65 return fscache_uncache_page(ci->fscache, page);
66}
67
68static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
69{
70 struct inode* inode = page->mapping->host;
71 struct ceph_inode_info *ci = ceph_inode(inode);
72 return fscache_maybe_release_page(ci->fscache, page, gfp);
73}
74
75static inline void ceph_fscache_readpage_cancel(struct inode *inode,
76 struct page *page)
77{
78 struct ceph_inode_info *ci = ceph_inode(inode);
79 if (fscache_cookie_valid(ci->fscache) && PageFsCache(page))
80 __fscache_uncache_page(ci->fscache, page);
81}
82
83static inline void ceph_fscache_readpages_cancel(struct inode *inode,
84 struct list_head *pages)
85{
86 struct ceph_inode_info *ci = ceph_inode(inode);
87 return fscache_readpages_cancel(ci->fscache, pages);
88}
89
90static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
91{
92 ci->i_fscache_gen = ci->i_rdcache_gen - 1;
93}
94
95#else
96
97static inline int ceph_fscache_register(void)
98{
99 return 0;
100}
101
102static inline void ceph_fscache_unregister(void)
103{
104}
105
106static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc)
107{
108 return 0;
109}
110
111static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
112{
113}
114
115static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
116{
117}
118
119static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
120{
121}
122
123static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
124{
125}
126
127static inline void ceph_fscache_file_set_cookie(struct inode *inode,
128 struct file *filp)
129{
130}
131
132static inline void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci)
133{
134}
135
136static inline void ceph_fscache_uncache_page(struct inode *inode,
137 struct page *pages)
138{
139}
140
141static inline int ceph_readpage_from_fscache(struct inode* inode,
142 struct page *page)
143{
144 return -ENOBUFS;
145}
146
147static inline int ceph_readpages_from_fscache(struct inode *inode,
148 struct address_space *mapping,
149 struct list_head *pages,
150 unsigned *nr_pages)
151{
152 return -ENOBUFS;
153}
154
155static inline void ceph_readpage_to_fscache(struct inode *inode,
156 struct page *page)
157{
158}
159
160static inline void ceph_fscache_invalidate(struct inode *inode)
161{
162}
163
164static inline void ceph_invalidate_fscache_page(struct inode *inode,
165 struct page *page)
166{
167}
168
169static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
170{
171 return 1;
172}
173
174static inline void ceph_fscache_readpage_cancel(struct inode *inode,
175 struct page *page)
176{
177}
178
179static inline void ceph_fscache_readpages_cancel(struct inode *inode,
180 struct list_head *pages)
181{
182}
183
184static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
185{
186}
187
188#endif
189
190#endif