/* SPDX-License-Identifier: GPL-2.0-only *//* * Ceph cache definitions. * *  Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved. *  Written by Milosz Tanski (milosz@adfin.com) */ #ifndef _CEPH_CACHE_H#define _CEPH_CACHE_H #include <linux/netfs.h> #ifdef CONFIG_CEPH_FSCACHE extern struct fscache_netfs ceph_cache_netfs; int ceph_fscache_register(void);void ceph_fscache_unregister(void); int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc); void ceph_fscache_register_inode_cookie(struct inode *inode);void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp);void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci); int ceph_readpage_from_fscache(struct inode *inode, struct page *page);int ceph_readpages_from_fscache(struct inode *inode,				struct address_space *mapping,				struct list_head *pages,				unsigned *nr_pages); static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci){	ci->fscache = NULL;} static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci){	return ci->fscache;} static inline void ceph_fscache_invalidate(struct inode *inode){	fscache_invalidate(ceph_inode(inode)->fscache);} static inline bool ceph_is_cache_enabled(struct inode *inode){	struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(inode)); 	if (!cookie)		return false;	return fscache_cookie_enabled(cookie);} static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq){	struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode)); 	return fscache_begin_read_operation(rreq, cookie);}#else static inline int ceph_fscache_register(void){	return 0;} static inline void ceph_fscache_unregister(void){} static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,					   struct fs_context *fc){	return 0;} static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc){} static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci){} static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci){	return NULL;} static inline void ceph_fscache_register_inode_cookie(struct inode *inode){} static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci){} static inline void ceph_fscache_file_set_cookie(struct inode *inode,						struct file *filp){} static inline void ceph_fscache_invalidate(struct inode *inode){} static inline bool ceph_is_cache_enabled(struct inode *inode){	return false;} static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq){	return -ENOBUFS;}#endif #endif /* _CEPH_CACHE_H */