1 /* SPDX-License-Identifier: LGPL-2.1 */
3 * CIFS filesystem cache interface definitions
5 * Copyright (c) 2010 Novell, Inc.
6 * Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
9 #ifndef _CIFS_FSCACHE_H
10 #define _CIFS_FSCACHE_H
12 #include <linux/fscache.h>
16 #ifdef CONFIG_CIFS_FSCACHE
19 * Auxiliary data attached to CIFS superblock within the cache
21 struct cifs_fscache_super_auxdata
{
22 u64 resource_id
; /* unique server resource id */
23 __le64 vol_create_time
;
24 u32 vol_serial_number
;
28 * Auxiliary data attached to CIFS inode within the cache
30 struct cifs_fscache_inode_auxdata
{
31 u64 last_write_time_sec
;
32 u64 last_change_time_sec
;
33 u32 last_write_time_nsec
;
34 u32 last_change_time_nsec
;
41 extern struct fscache_netfs cifs_fscache_netfs
;
42 extern const struct fscache_cookie_def cifs_fscache_server_index_def
;
43 extern const struct fscache_cookie_def cifs_fscache_super_index_def
;
44 extern const struct fscache_cookie_def cifs_fscache_inode_object_def
;
46 extern int cifs_fscache_register(void);
47 extern void cifs_fscache_unregister(void);
52 extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info
*);
53 extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info
*);
54 extern void cifs_fscache_get_super_cookie(struct cifs_tcon
*);
55 extern void cifs_fscache_release_super_cookie(struct cifs_tcon
*);
57 extern void cifs_fscache_release_inode_cookie(struct inode
*);
58 extern void cifs_fscache_update_inode_cookie(struct inode
*inode
);
59 extern void cifs_fscache_set_inode_cookie(struct inode
*, struct file
*);
60 extern void cifs_fscache_reset_inode_cookie(struct inode
*);
62 extern void __cifs_fscache_invalidate_page(struct page
*, struct inode
*);
63 extern void __cifs_fscache_wait_on_page_write(struct inode
*inode
, struct page
*page
);
64 extern void __cifs_fscache_uncache_page(struct inode
*inode
, struct page
*page
);
65 extern int cifs_fscache_release_page(struct page
*page
, gfp_t gfp
);
66 extern int __cifs_readpage_from_fscache(struct inode
*, struct page
*);
67 extern int __cifs_readpages_from_fscache(struct inode
*,
68 struct address_space
*,
71 extern void __cifs_fscache_readpages_cancel(struct inode
*, struct list_head
*);
73 extern void __cifs_readpage_to_fscache(struct inode
*, struct page
*);
75 static inline void cifs_fscache_invalidate_page(struct page
*page
,
78 if (PageFsCache(page
))
79 __cifs_fscache_invalidate_page(page
, inode
);
82 static inline void cifs_fscache_wait_on_page_write(struct inode
*inode
,
85 if (PageFsCache(page
))
86 __cifs_fscache_wait_on_page_write(inode
, page
);
89 static inline void cifs_fscache_uncache_page(struct inode
*inode
,
92 if (PageFsCache(page
))
93 __cifs_fscache_uncache_page(inode
, page
);
96 static inline int cifs_readpage_from_fscache(struct inode
*inode
,
99 if (CIFS_I(inode
)->fscache
)
100 return __cifs_readpage_from_fscache(inode
, page
);
105 static inline int cifs_readpages_from_fscache(struct inode
*inode
,
106 struct address_space
*mapping
,
107 struct list_head
*pages
,
110 if (CIFS_I(inode
)->fscache
)
111 return __cifs_readpages_from_fscache(inode
, mapping
, pages
,
116 static inline void cifs_readpage_to_fscache(struct inode
*inode
,
119 if (PageFsCache(page
))
120 __cifs_readpage_to_fscache(inode
, page
);
123 static inline void cifs_fscache_readpages_cancel(struct inode
*inode
,
124 struct list_head
*pages
)
126 if (CIFS_I(inode
)->fscache
)
127 return __cifs_fscache_readpages_cancel(inode
, pages
);
130 #else /* CONFIG_CIFS_FSCACHE */
131 static inline int cifs_fscache_register(void) { return 0; }
132 static inline void cifs_fscache_unregister(void) {}
135 cifs_fscache_get_client_cookie(struct TCP_Server_Info
*server
) {}
137 cifs_fscache_release_client_cookie(struct TCP_Server_Info
*server
) {}
138 static inline void cifs_fscache_get_super_cookie(struct cifs_tcon
*tcon
) {}
140 cifs_fscache_release_super_cookie(struct cifs_tcon
*tcon
) {}
142 static inline void cifs_fscache_release_inode_cookie(struct inode
*inode
) {}
143 static inline void cifs_fscache_update_inode_cookie(struct inode
*inode
) {}
144 static inline void cifs_fscache_set_inode_cookie(struct inode
*inode
,
145 struct file
*filp
) {}
146 static inline void cifs_fscache_reset_inode_cookie(struct inode
*inode
) {}
147 static inline int cifs_fscache_release_page(struct page
*page
, gfp_t gfp
)
149 return 1; /* May release page */
152 static inline void cifs_fscache_invalidate_page(struct page
*page
,
153 struct inode
*inode
) {}
154 static inline void cifs_fscache_wait_on_page_write(struct inode
*inode
,
155 struct page
*page
) {}
156 static inline void cifs_fscache_uncache_page(struct inode
*inode
,
157 struct page
*page
) {}
160 cifs_readpage_from_fscache(struct inode
*inode
, struct page
*page
)
165 static inline int cifs_readpages_from_fscache(struct inode
*inode
,
166 struct address_space
*mapping
,
167 struct list_head
*pages
,
173 static inline void cifs_readpage_to_fscache(struct inode
*inode
,
174 struct page
*page
) {}
176 static inline void cifs_fscache_readpages_cancel(struct inode
*inode
,
177 struct list_head
*pages
)
181 #endif /* CONFIG_CIFS_FSCACHE */
183 #endif /* _CIFS_FSCACHE_H */