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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_inode_init(struct ceph_inode_info *ci);
38void ceph_fscache_register_inode_cookie(struct ceph_fs_client* fsc,
39 struct ceph_inode_info* ci);
40void ceph_fscache_unregister_inode_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);
49void ceph_queue_revalidate(struct inode *inode);
50
51static inline void ceph_fscache_update_objectsize(struct inode *inode)
52{
53 struct ceph_inode_info *ci = ceph_inode(inode);
54 fscache_attr_changed(ci->fscache);
55}
56
57static inline void ceph_fscache_invalidate(struct inode *inode)
58{
59 fscache_invalidate(ceph_inode(inode)->fscache);
60}
61
62static inline void ceph_fscache_uncache_page(struct inode *inode,
63 struct page *page)
64{
65 struct ceph_inode_info *ci = ceph_inode(inode);
66 return fscache_uncache_page(ci->fscache, page);
67}
68
69static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
70{
71 struct inode* inode = page->mapping->host;
72 struct ceph_inode_info *ci = ceph_inode(inode);
73 return fscache_maybe_release_page(ci->fscache, page, gfp);
74}
75
76static inline void ceph_fscache_readpage_cancel(struct inode *inode,
77 struct page *page)
78{
79 struct ceph_inode_info *ci = ceph_inode(inode);
80 if (fscache_cookie_valid(ci->fscache) && PageFsCache(page))
81 __fscache_uncache_page(ci->fscache, page);
82}
83
84static inline void ceph_fscache_readpages_cancel(struct inode *inode,
85 struct list_head *pages)
86{
87 struct ceph_inode_info *ci = ceph_inode(inode);
88 return fscache_readpages_cancel(ci->fscache, pages);
89}
90
91#else
92
93static inline int ceph_fscache_register(void)
94{
95 return 0;
96}
97
98static inline void ceph_fscache_unregister(void)
99{
100}
101
102static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc)
103{
104 return 0;
105}
106
107static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
108{
109}
110
111static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
112{
113}
114
115static inline void ceph_fscache_register_inode_cookie(struct ceph_fs_client* parent_fsc,
116 struct ceph_inode_info* ci)
117{
118}
119
120static inline void ceph_fscache_uncache_page(struct inode *inode,
121 struct page *pages)
122{
123}
124
125static inline int ceph_readpage_from_fscache(struct inode* inode,
126 struct page *page)
127{
128 return -ENOBUFS;
129}
130
131static inline int ceph_readpages_from_fscache(struct inode *inode,
132 struct address_space *mapping,
133 struct list_head *pages,
134 unsigned *nr_pages)
135{
136 return -ENOBUFS;
137}
138
139static inline void ceph_readpage_to_fscache(struct inode *inode,
140 struct page *page)
141{
142}
143
144static inline void ceph_fscache_update_objectsize(struct inode *inode)
145{
146}
147
148static inline void ceph_fscache_invalidate(struct inode *inode)
149{
150}
151
152static inline void ceph_invalidate_fscache_page(struct inode *inode,
153 struct page *page)
154{
155}
156
157static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
158{
159}
160
161static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
162{
163 return 1;
164}
165
166static inline void ceph_fscache_readpage_cancel(struct inode *inode,
167 struct page *page)
168{
169}
170
171static inline void ceph_fscache_readpages_cancel(struct inode *inode,
172 struct list_head *pages)
173{
174}
175
176static inline void ceph_queue_revalidate(struct inode *inode)
177{
178}
179
180#endif
181
182#endif
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