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176 lines
4.2 KiB
176 lines
4.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Ceph cache definitions. |
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* |
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* Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. |
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* Written by Milosz Tanski ([email protected]) |
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*/ |
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#ifndef _CEPH_CACHE_H |
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#define _CEPH_CACHE_H |
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#ifdef CONFIG_CEPH_FSCACHE |
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extern struct fscache_netfs ceph_cache_netfs; |
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int ceph_fscache_register(void); |
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void ceph_fscache_unregister(void); |
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int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc); |
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void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc); |
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void ceph_fscache_register_inode_cookie(struct inode *inode); |
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void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci); |
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void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp); |
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void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci); |
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int ceph_readpage_from_fscache(struct inode *inode, struct page *page); |
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int ceph_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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void ceph_readpage_to_fscache(struct inode *inode, struct page *page); |
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void ceph_invalidate_fscache_page(struct inode* inode, struct page *page); |
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static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) |
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{ |
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ci->fscache = NULL; |
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ci->i_fscache_gen = 0; |
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} |
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static inline void ceph_fscache_invalidate(struct inode *inode) |
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{ |
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fscache_invalidate(ceph_inode(inode)->fscache); |
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} |
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static inline void ceph_fscache_uncache_page(struct inode *inode, |
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struct page *page) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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return fscache_uncache_page(ci->fscache, page); |
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} |
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static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) |
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{ |
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struct inode* inode = page->mapping->host; |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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return fscache_maybe_release_page(ci->fscache, page, gfp); |
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} |
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static inline void ceph_fscache_readpage_cancel(struct inode *inode, |
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struct page *page) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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if (fscache_cookie_valid(ci->fscache) && PageFsCache(page)) |
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__fscache_uncache_page(ci->fscache, page); |
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} |
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static inline void ceph_fscache_readpages_cancel(struct inode *inode, |
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struct list_head *pages) |
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{ |
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struct ceph_inode_info *ci = ceph_inode(inode); |
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return fscache_readpages_cancel(ci->fscache, pages); |
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} |
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static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci) |
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{ |
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ci->i_fscache_gen = ci->i_rdcache_gen - 1; |
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} |
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#else |
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static inline int ceph_fscache_register(void) |
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{ |
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return 0; |
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} |
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static inline void ceph_fscache_unregister(void) |
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{ |
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} |
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static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc, |
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struct fs_context *fc) |
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{ |
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return 0; |
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} |
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static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc) |
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{ |
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} |
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static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci) |
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{ |
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} |
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static inline void ceph_fscache_register_inode_cookie(struct inode *inode) |
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{ |
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} |
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static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci) |
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{ |
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} |
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static inline void ceph_fscache_file_set_cookie(struct inode *inode, |
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struct file *filp) |
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{ |
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} |
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static inline void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci) |
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{ |
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} |
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static inline void ceph_fscache_uncache_page(struct inode *inode, |
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struct page *pages) |
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{ |
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} |
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static inline int ceph_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 ceph_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 ceph_readpage_to_fscache(struct inode *inode, |
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struct page *page) |
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{ |
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} |
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static inline void ceph_fscache_invalidate(struct inode *inode) |
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{ |
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} |
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static inline void ceph_invalidate_fscache_page(struct inode *inode, |
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struct page *page) |
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{ |
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} |
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static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp) |
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{ |
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return 1; |
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} |
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static inline void ceph_fscache_readpage_cancel(struct inode *inode, |
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struct page *page) |
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{ |
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} |
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static inline void ceph_fscache_readpages_cancel(struct inode *inode, |
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struct list_head *pages) |
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{ |
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} |
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static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci) |
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{ |
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} |
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#endif |
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#endif
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