[mirror_ubuntu-jammy-kernel.git] / fs / ceph / cache.h

/* 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 */
Commit	Line	Data
1f327613	1	/* SPDX-License-Identifier: GPL-2.0-only */
99ccbd22 MT	2	/*
	3	* Ceph cache definitions.
	4	*
	5	* Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
	6	* Written by Milosz Tanski (milosz@adfin.com)
99ccbd22 MT	7	*/
	8
	9	#ifndef _CEPH_CACHE_H
	10	#define _CEPH_CACHE_H
	11
f0702876 JL	12	#include <linux/netfs.h>
f0702876 JL	13
99ccbd22 MT	14	#ifdef CONFIG_CEPH_FSCACHE
99ccbd22 MT	15
971f0bde MT	16	extern struct fscache_netfs ceph_cache_netfs;
971f0bde MT	17
99ccbd22 MT	18	int ceph_fscache_register(void);
	19	void ceph_fscache_unregister(void);
	20
82995cc6	21	int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
99ccbd22 MT	22	void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
99ccbd22 MT	23
46b59b2b	24	void ceph_fscache_register_inode_cookie(struct inode *inode);
99ccbd22	25	void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
46b59b2b	26	void ceph_fscache_file_set_cookie(struct inode inode, struct file filp);
f7f7e7a0	27	void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci);
99ccbd22 MT	28
	29	int ceph_readpage_from_fscache(struct inode inode, struct page page);
	30	int ceph_readpages_from_fscache(struct inode *inode,
	31	struct address_space *mapping,
	32	struct list_head *pages,
	33	unsigned *nr_pages);
f7f7e7a0 YZ	34
	35	static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
	36	{
	37	ci->fscache = NULL;
f7f7e7a0	38	}
99ccbd22	39
f0702876 JL	40	static inline struct fscache_cookie ceph_fscache_cookie(struct ceph_inode_info ci)
	41	{
	42	return ci->fscache;
	43	}
	44
99ccbd22 MT	45	static inline void ceph_fscache_invalidate(struct inode *inode)
	46	{
	47	fscache_invalidate(ceph_inode(inode)->fscache);
	48	}
	49
f0702876 JL	50	static inline bool ceph_is_cache_enabled(struct inode *inode)
	51	{
	52	struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(inode));
	53
	54	if (!cookie)
	55	return false;
	56	return fscache_cookie_enabled(cookie);
	57	}
	58
	59	static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
	60	{
	61	struct fscache_cookie *cookie = ceph_fscache_cookie(ceph_inode(rreq->inode));
	62
	63	return fscache_begin_read_operation(rreq, cookie);
	64	}
99ccbd22 MT	65	#else
	66
	67	static inline int ceph_fscache_register(void)
	68	{
	69	return 0;
	70	}
	71
	72	static inline void ceph_fscache_unregister(void)
	73	{
	74	}
	75
82995cc6 DH	76	static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
82995cc6 DH	77	struct fs_context *fc)
99ccbd22 MT	78	{
	79	return 0;
	80	}
	81
	82	static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
	83	{
	84	}
	85
	86	static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
	87	{
	88	}
	89
f0702876 JL	90	static inline struct fscache_cookie ceph_fscache_cookie(struct ceph_inode_info ci)
	91	{
	92	return NULL;
	93	}
	94
46b59b2b YZ	95	static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
	96	{
	97	}
	98
	99	static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
	100	{
	101	}
	102
	103	static inline void ceph_fscache_file_set_cookie(struct inode *inode,
	104	struct file *filp)
99ccbd22 MT	105	{
	106	}
	107
99ccbd22 MT	108	static inline void ceph_fscache_invalidate(struct inode *inode)
	109	{
	110	}
	111
f0702876 JL	112	static inline bool ceph_is_cache_enabled(struct inode *inode)
	113	{
	114	return false;
	115	}
	116
	117	static inline int ceph_begin_cache_operation(struct netfs_read_request *rreq)
	118	{
	119	return -ENOBUFS;
	120	}
99ccbd22 MT	121	#endif
99ccbd22 MT	122
e7df4524	123	#endif /* _CEPH_CACHE_H */