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 void ceph_fscache_unpin_writeback(struct inode *inode, |
47 | struct writeback_control *wbc) |
48 | { |
49 | fscache_unpin_writeback(wbc, cookie: ceph_fscache_cookie(ci: ceph_inode(inode))); |
50 | } |
51 | |
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(inode: mapping->host); |
56 | |
57 | return fscache_dirty_folio(mapping, folio, cookie: ceph_fscache_cookie(ci)); |
58 | } |
59 | |
60 | static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq) |
61 | { |
62 | struct fscache_cookie *cookie = ceph_fscache_cookie(ci: ceph_inode(inode: rreq->inode)); |
63 | |
64 | return fscache_begin_read_operation(cres: &rreq->cache_resources, cookie); |
65 | } |
66 | |
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 | |
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(cookie: ceph_fscache_cookie(ci)); |
77 | } |
78 | #else /* CONFIG_CEPH_FSCACHE */ |
79 | static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc, |
80 | struct fs_context *fc) |
81 | { |
82 | return 0; |
83 | } |
84 | |
85 | static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) |
86 | { |
87 | } |
88 | |
89 | static inline void ceph_fscache_register_inode_cookie(struct inode *inode) |
90 | { |
91 | } |
92 | |
93 | static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) |
94 | { |
95 | } |
96 | |
97 | static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify) |
98 | { |
99 | } |
100 | |
101 | static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update) |
102 | { |
103 | } |
104 | |
105 | static inline void ceph_fscache_update(struct inode *inode) |
106 | { |
107 | } |
108 | |
109 | static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write) |
110 | { |
111 | } |
112 | |
113 | static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci) |
114 | { |
115 | return NULL; |
116 | } |
117 | |
118 | static inline void ceph_fscache_resize(struct inode *inode, loff_t to) |
119 | { |
120 | } |
121 | |
122 | static inline void ceph_fscache_unpin_writeback(struct inode *inode, |
123 | struct writeback_control *wbc) |
124 | { |
125 | } |
126 | |
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 | |
133 | static inline bool ceph_is_cache_enabled(struct inode *inode) |
134 | { |
135 | return false; |
136 | } |
137 | |
138 | static inline int ceph_begin_cache_operation(struct netfs_io_request *rreq) |
139 | { |
140 | return -ENOBUFS; |
141 | } |
142 | |
143 | static inline void ceph_fscache_note_page_release(struct inode *inode) |
144 | { |
145 | } |
146 | #endif /* CONFIG_CEPH_FSCACHE */ |
147 | |
148 | #endif |
149 | |