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 | |
29 | static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci) |
30 | { |
31 | return netfs_i_cookie(ctx: &ci->netfs); |
32 | } |
33 | |
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, will_modify: true); |
41 | fscache_resize_cookie(cookie, new_size: to); |
42 | ceph_fscache_unuse_cookie(inode, update: true); |
43 | } |
44 | } |
45 | |
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 | |
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 */ |
60 | static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc, |
61 | struct fs_context *fc) |
62 | { |
63 | return 0; |
64 | } |
65 | |
66 | static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) |
67 | { |
68 | } |
69 | |
70 | static inline void ceph_fscache_register_inode_cookie(struct inode *inode) |
71 | { |
72 | } |
73 | |
74 | static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) |
75 | { |
76 | } |
77 | |
78 | static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify) |
79 | { |
80 | } |
81 | |
82 | static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update) |
83 | { |
84 | } |
85 | |
86 | static inline void ceph_fscache_update(struct inode *inode) |
87 | { |
88 | } |
89 | |
90 | static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write) |
91 | { |
92 | } |
93 | |
94 | static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci) |
95 | { |
96 | return NULL; |
97 | } |
98 | |
99 | static inline void ceph_fscache_resize(struct inode *inode, loff_t to) |
100 | { |
101 | } |
102 | |
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 | |
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 | |