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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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f0702876e1
Have the ceph KConfig select NETFS_SUPPORT. Add a new netfs ops structure and the operations for it. Convert ceph_readpage to use the new netfs_readpage helper. Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/* 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 (milosz@adfin.com)
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*/
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#ifndef _CEPH_CACHE_H
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#define _CEPH_CACHE_H
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#include <linux/netfs.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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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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}
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static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
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{
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return ci->fscache;
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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 bool ceph_is_cache_enabled(struct inode *inode)
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{
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struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(inode));
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if (!cookie)
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return false;
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return fscache_cookie_enabled(cookie);
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}
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static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
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{
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struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));
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return fscache_begin_read_operation(rreq, cookie);
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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 struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
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{
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return NULL;
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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_invalidate(struct inode *inode)
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{
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}
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static inline bool ceph_is_cache_enabled(struct inode *inode)
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{
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return false;
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}
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static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
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{
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return -ENOBUFS;
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}
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#endif
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#endif /* _CEPH_CACHE_H */
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