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 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
ceph_is_cache_enabled(struct inode * inode)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 */
ceph_fscache_register_fs(struct ceph_fs_client * fsc,struct fs_context * fc)60 static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
61 struct fs_context *fc)
62 {
63 return 0;
64 }
65
ceph_fscache_unregister_fs(struct ceph_fs_client * fsc)66 static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
67 {
68 }
69
ceph_fscache_register_inode_cookie(struct inode * inode)70 static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
71 {
72 }
73
ceph_fscache_unregister_inode_cookie(struct ceph_inode_info * ci)74 static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
75 {
76 }
77
ceph_fscache_use_cookie(struct inode * inode,bool will_modify)78 static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
79 {
80 }
81
ceph_fscache_unuse_cookie(struct inode * inode,bool update)82 static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
83 {
84 }
85
ceph_fscache_update(struct inode * inode)86 static inline void ceph_fscache_update(struct inode *inode)
87 {
88 }
89
ceph_fscache_invalidate(struct inode * inode,bool dio_write)90 static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
91 {
92 }
93
ceph_fscache_cookie(struct ceph_inode_info * ci)94 static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
95 {
96 return NULL;
97 }
98
ceph_fscache_resize(struct inode * inode,loff_t to)99 static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
100 {
101 }
102
ceph_fscache_unpin_writeback(struct inode * inode,struct writeback_control * wbc)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
ceph_is_cache_enabled(struct inode * inode)111 static inline bool ceph_is_cache_enabled(struct inode *inode)
112 {
113 return false;
114 }
115 #endif /* CONFIG_CEPH_FSCACHE */
116
117 #endif
118