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/* 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 */
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