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137 lines
3.8 KiB
137 lines
3.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* V9FS cache definitions. |
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* |
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* Copyright (C) 2009 by Abhishek Kulkarni <[email protected]> |
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*/ |
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#ifndef _9P_CACHE_H |
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#define _9P_CACHE_H |
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#ifdef CONFIG_9P_FSCACHE |
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#include <linux/fscache.h> |
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#include <linux/spinlock.h> |
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extern struct fscache_netfs v9fs_cache_netfs; |
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extern const struct fscache_cookie_def v9fs_cache_session_index_def; |
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extern const struct fscache_cookie_def v9fs_cache_inode_index_def; |
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extern void v9fs_cache_session_get_cookie(struct v9fs_session_info *v9ses); |
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extern void v9fs_cache_session_put_cookie(struct v9fs_session_info *v9ses); |
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extern void v9fs_cache_inode_get_cookie(struct inode *inode); |
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extern void v9fs_cache_inode_put_cookie(struct inode *inode); |
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extern void v9fs_cache_inode_flush_cookie(struct inode *inode); |
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extern void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *filp); |
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extern void v9fs_cache_inode_reset_cookie(struct inode *inode); |
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extern int __v9fs_cache_register(void); |
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extern void __v9fs_cache_unregister(void); |
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extern int __v9fs_fscache_release_page(struct page *page, gfp_t gfp); |
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extern void __v9fs_fscache_invalidate_page(struct page *page); |
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extern int __v9fs_readpage_from_fscache(struct inode *inode, |
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struct page *page); |
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extern int __v9fs_readpages_from_fscache(struct inode *inode, |
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struct address_space *mapping, |
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struct list_head *pages, |
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unsigned *nr_pages); |
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extern void __v9fs_readpage_to_fscache(struct inode *inode, struct page *page); |
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extern void __v9fs_fscache_wait_on_page_write(struct inode *inode, |
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struct page *page); |
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static inline int v9fs_fscache_release_page(struct page *page, |
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gfp_t gfp) |
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{ |
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return __v9fs_fscache_release_page(page, gfp); |
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} |
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static inline void v9fs_fscache_invalidate_page(struct page *page) |
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{ |
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__v9fs_fscache_invalidate_page(page); |
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} |
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static inline int v9fs_readpage_from_fscache(struct inode *inode, |
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struct page *page) |
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{ |
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return __v9fs_readpage_from_fscache(inode, page); |
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} |
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static inline int v9fs_readpages_from_fscache(struct inode *inode, |
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struct address_space *mapping, |
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struct list_head *pages, |
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unsigned *nr_pages) |
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{ |
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return __v9fs_readpages_from_fscache(inode, mapping, pages, |
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nr_pages); |
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} |
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static inline void v9fs_readpage_to_fscache(struct inode *inode, |
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struct page *page) |
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{ |
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if (PageFsCache(page)) |
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__v9fs_readpage_to_fscache(inode, page); |
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} |
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static inline void v9fs_uncache_page(struct inode *inode, struct page *page) |
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{ |
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struct v9fs_inode *v9inode = V9FS_I(inode); |
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fscache_uncache_page(v9inode->fscache, page); |
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BUG_ON(PageFsCache(page)); |
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} |
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static inline void v9fs_fscache_wait_on_page_write(struct inode *inode, |
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struct page *page) |
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{ |
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return __v9fs_fscache_wait_on_page_write(inode, page); |
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} |
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#else /* CONFIG_9P_FSCACHE */ |
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static inline void v9fs_cache_inode_get_cookie(struct inode *inode) |
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{ |
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} |
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static inline void v9fs_cache_inode_put_cookie(struct inode *inode) |
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{ |
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} |
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static inline void v9fs_cache_inode_set_cookie(struct inode *inode, struct file *file) |
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{ |
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} |
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static inline int v9fs_fscache_release_page(struct page *page, |
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gfp_t gfp) { |
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return 1; |
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} |
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static inline void v9fs_fscache_invalidate_page(struct page *page) {} |
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static inline int v9fs_readpage_from_fscache(struct inode *inode, |
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struct page *page) |
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{ |
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return -ENOBUFS; |
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} |
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static inline int v9fs_readpages_from_fscache(struct inode *inode, |
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struct address_space *mapping, |
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struct list_head *pages, |
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unsigned *nr_pages) |
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{ |
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return -ENOBUFS; |
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} |
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static inline void v9fs_readpage_to_fscache(struct inode *inode, |
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struct page *page) |
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{} |
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static inline void v9fs_uncache_page(struct inode *inode, struct page *page) |
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{} |
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static inline void v9fs_fscache_wait_on_page_write(struct inode *inode, |
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struct page *page) |
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{ |
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return; |
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} |
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#endif /* CONFIG_9P_FSCACHE */ |
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#endif /* _9P_CACHE_H */
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