1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * V9FS cache definitions.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2009 by Abhishek Kulkarni <adkulkar@umail.iu.edu>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef _9P_CACHE_H
9*4882a593Smuzhiyun #define _9P_CACHE_H
10*4882a593Smuzhiyun #ifdef CONFIG_9P_FSCACHE
11*4882a593Smuzhiyun #include <linux/fscache.h>
12*4882a593Smuzhiyun #include <linux/spinlock.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun extern struct fscache_netfs v9fs_cache_netfs;
15*4882a593Smuzhiyun extern const struct fscache_cookie_def v9fs_cache_session_index_def;
16*4882a593Smuzhiyun extern const struct fscache_cookie_def v9fs_cache_inode_index_def;
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun extern void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses);
19*4882a593Smuzhiyun extern void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses);
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun extern void v9fs_cache_inode_get_cookie(struct inode *inode);
22*4882a593Smuzhiyun extern void v9fs_cache_inode_put_cookie(struct inode *inode);
23*4882a593Smuzhiyun extern void v9fs_cache_inode_flush_cookie(struct inode *inode);
24*4882a593Smuzhiyun extern void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *filp);
25*4882a593Smuzhiyun extern void v9fs_cache_inode_reset_cookie(struct inode *inode);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun extern int __v9fs_cache_register(void);
28*4882a593Smuzhiyun extern void __v9fs_cache_unregister(void);
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun extern int __v9fs_fscache_release_page(struct page *page, gfp_t gfp);
31*4882a593Smuzhiyun extern void __v9fs_fscache_invalidate_page(struct page *page);
32*4882a593Smuzhiyun extern int __v9fs_readpage_from_fscache(struct inode *inode,
33*4882a593Smuzhiyun struct page *page);
34*4882a593Smuzhiyun extern int __v9fs_readpages_from_fscache(struct inode *inode,
35*4882a593Smuzhiyun struct address_space *mapping,
36*4882a593Smuzhiyun struct list_head *pages,
37*4882a593Smuzhiyun unsigned *nr_pages);
38*4882a593Smuzhiyun extern void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page);
39*4882a593Smuzhiyun extern void __v9fs_fscache_wait_on_page_write(struct inode *inode,
40*4882a593Smuzhiyun struct page *page);
41*4882a593Smuzhiyun
v9fs_fscache_release_page(struct page * page,gfp_t gfp)42*4882a593Smuzhiyun static inline int v9fs_fscache_release_page(struct page *page,
43*4882a593Smuzhiyun gfp_t gfp)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun return __v9fs_fscache_release_page(page, gfp);
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
v9fs_fscache_invalidate_page(struct page * page)48*4882a593Smuzhiyun static inline void v9fs_fscache_invalidate_page(struct page *page)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun __v9fs_fscache_invalidate_page(page);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
v9fs_readpage_from_fscache(struct inode * inode,struct page * page)53*4882a593Smuzhiyun static inline int v9fs_readpage_from_fscache(struct inode *inode,
54*4882a593Smuzhiyun struct page *page)
55*4882a593Smuzhiyun {
56*4882a593Smuzhiyun return __v9fs_readpage_from_fscache(inode, page);
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
v9fs_readpages_from_fscache(struct inode * inode,struct address_space * mapping,struct list_head * pages,unsigned * nr_pages)59*4882a593Smuzhiyun static inline int v9fs_readpages_from_fscache(struct inode *inode,
60*4882a593Smuzhiyun struct address_space *mapping,
61*4882a593Smuzhiyun struct list_head *pages,
62*4882a593Smuzhiyun unsigned *nr_pages)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun return __v9fs_readpages_from_fscache(inode, mapping, pages,
65*4882a593Smuzhiyun nr_pages);
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
v9fs_readpage_to_fscache(struct inode * inode,struct page * page)68*4882a593Smuzhiyun static inline void v9fs_readpage_to_fscache(struct inode *inode,
69*4882a593Smuzhiyun struct page *page)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun if (PageFsCache(page))
72*4882a593Smuzhiyun __v9fs_readpage_to_fscache(inode, page);
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
v9fs_uncache_page(struct inode * inode,struct page * page)75*4882a593Smuzhiyun static inline void v9fs_uncache_page(struct inode *inode, struct page *page)
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun struct v9fs_inode *v9inode = V9FS_I(inode);
78*4882a593Smuzhiyun fscache_uncache_page(v9inode->fscache, page);
79*4882a593Smuzhiyun BUG_ON(PageFsCache(page));
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
v9fs_fscache_wait_on_page_write(struct inode * inode,struct page * page)82*4882a593Smuzhiyun static inline void v9fs_fscache_wait_on_page_write(struct inode *inode,
83*4882a593Smuzhiyun struct page *page)
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun return __v9fs_fscache_wait_on_page_write(inode, page);
86*4882a593Smuzhiyun }
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun #else /* CONFIG_9P_FSCACHE */
89*4882a593Smuzhiyun
v9fs_cache_inode_get_cookie(struct inode * inode)90*4882a593Smuzhiyun static inline void v9fs_cache_inode_get_cookie(struct inode *inode)
91*4882a593Smuzhiyun {
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun
v9fs_cache_inode_put_cookie(struct inode * inode)94*4882a593Smuzhiyun static inline void v9fs_cache_inode_put_cookie(struct inode *inode)
95*4882a593Smuzhiyun {
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
v9fs_cache_inode_set_cookie(struct inode * inode,struct file * file)98*4882a593Smuzhiyun static inline void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *file)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun
v9fs_fscache_release_page(struct page * page,gfp_t gfp)102*4882a593Smuzhiyun static inline int v9fs_fscache_release_page(struct page *page,
103*4882a593Smuzhiyun gfp_t gfp) {
104*4882a593Smuzhiyun return 1;
105*4882a593Smuzhiyun }
106*4882a593Smuzhiyun
v9fs_fscache_invalidate_page(struct page * page)107*4882a593Smuzhiyun static inline void v9fs_fscache_invalidate_page(struct page *page) {}
108*4882a593Smuzhiyun
v9fs_readpage_from_fscache(struct inode * inode,struct page * page)109*4882a593Smuzhiyun static inline int v9fs_readpage_from_fscache(struct inode *inode,
110*4882a593Smuzhiyun struct page *page)
111*4882a593Smuzhiyun {
112*4882a593Smuzhiyun return -ENOBUFS;
113*4882a593Smuzhiyun }
114*4882a593Smuzhiyun
v9fs_readpages_from_fscache(struct inode * inode,struct address_space * mapping,struct list_head * pages,unsigned * nr_pages)115*4882a593Smuzhiyun static inline int v9fs_readpages_from_fscache(struct inode *inode,
116*4882a593Smuzhiyun struct address_space *mapping,
117*4882a593Smuzhiyun struct list_head *pages,
118*4882a593Smuzhiyun unsigned *nr_pages)
119*4882a593Smuzhiyun {
120*4882a593Smuzhiyun return -ENOBUFS;
121*4882a593Smuzhiyun }
122*4882a593Smuzhiyun
v9fs_readpage_to_fscache(struct inode * inode,struct page * page)123*4882a593Smuzhiyun static inline void v9fs_readpage_to_fscache(struct inode *inode,
124*4882a593Smuzhiyun struct page *page)
125*4882a593Smuzhiyun {}
126*4882a593Smuzhiyun
v9fs_uncache_page(struct inode * inode,struct page * page)127*4882a593Smuzhiyun static inline void v9fs_uncache_page(struct inode *inode, struct page *page)
128*4882a593Smuzhiyun {}
129*4882a593Smuzhiyun
v9fs_fscache_wait_on_page_write(struct inode * inode,struct page * page)130*4882a593Smuzhiyun static inline void v9fs_fscache_wait_on_page_write(struct inode *inode,
131*4882a593Smuzhiyun struct page *page)
132*4882a593Smuzhiyun {
133*4882a593Smuzhiyun return;
134*4882a593Smuzhiyun }
135*4882a593Smuzhiyun
136*4882a593Smuzhiyun #endif /* CONFIG_9P_FSCACHE */
137*4882a593Smuzhiyun #endif /* _9P_CACHE_H */
138