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
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
ceph_fscache_cookie(struct ceph_inode_info * ci)29 static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
30 {
31 return netfs_i_cookie(&ci->netfs);
32 }
33
ceph_fscache_resize(struct inode * inode,loff_t to)34 static 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
ceph_fscache_unpin_writeback(struct inode * inode,struct writeback_control * wbc)46 static 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
ceph_fscache_dirty_folio(struct address_space * mapping,struct folio * folio)52 static 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
ceph_begin_cache_operation(struct netfs_io_request * rreq)60 static 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
ceph_is_cache_enabled(struct inode * inode)67 static inline bool ceph_is_cache_enabled(struct inode *inode)
68 {
69 return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
70 }
71
ceph_fscache_note_page_release(struct inode * inode)72 static 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 */
ceph_fscache_register_fs(struct ceph_fs_client * fsc,struct fs_context * fc)79 static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
80 struct fs_context *fc)
81 {
82 return 0;
83 }
84
ceph_fscache_unregister_fs(struct ceph_fs_client * fsc)85 static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
86 {
87 }
88
ceph_fscache_register_inode_cookie(struct inode * inode)89 static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
90 {
91 }
92
ceph_fscache_unregister_inode_cookie(struct ceph_inode_info * ci)93 static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
94 {
95 }
96
ceph_fscache_use_cookie(struct inode * inode,bool will_modify)97 static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
98 {
99 }
100
ceph_fscache_unuse_cookie(struct inode * inode,bool update)101 static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
102 {
103 }
104
ceph_fscache_update(struct inode * inode)105 static inline void ceph_fscache_update(struct inode *inode)
106 {
107 }
108
ceph_fscache_invalidate(struct inode * inode,bool dio_write)109 static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
110 {
111 }
112
ceph_fscache_cookie(struct ceph_inode_info * ci)113 static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
114 {
115 return NULL;
116 }
117
ceph_fscache_resize(struct inode * inode,loff_t to)118 static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
119 {
120 }
121
ceph_fscache_unpin_writeback(struct inode * inode,struct writeback_control * wbc)122 static inline void ceph_fscache_unpin_writeback(struct inode *inode,
123 struct writeback_control *wbc)
124 {
125 }
126
ceph_fscache_dirty_folio(struct address_space * mapping,struct folio * folio)127 static inline int ceph_fscache_dirty_folio(struct address_space *mapping,
128 struct folio *folio)
129 {
130 return filemap_dirty_folio(mapping, folio);
131 }
132
ceph_is_cache_enabled(struct inode * inode)133 static inline bool ceph_is_cache_enabled(struct inode *inode)
134 {
135 return false;
136 }
137
ceph_begin_cache_operation(struct netfs_io_request * rreq)138 static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq)
139 {
140 return -ENOBUFS;
141 }
142
ceph_fscache_note_page_release(struct inode * inode)143 static inline void ceph_fscache_note_page_release(struct inode *inode)
144 {
145 }
146 #endif /* CONFIG_CEPH_FSCACHE */
147
148 #endif
149