[linux.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 ([email protected])
 */

#ifndef _CEPH_CACHE_H
#define _CEPH_CACHE_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);
void ceph_readpage_to_fscache(struct inode *inode, struct page *page);
void ceph_invalidate_fscache_page(struct inode* inode, struct page *page);

static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
{
	ci->fscache = NULL;
	ci->i_fscache_gen = 0;
}

static inline void ceph_fscache_invalidate(struct inode *inode)
{
	fscache_invalidate(ceph_inode(inode)->fscache);
}

static inline void ceph_fscache_uncache_page(struct inode *inode,
					     struct page *page)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	return fscache_uncache_page(ci->fscache, page);
}

static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
{
	struct inode* inode = page->mapping->host;
	struct ceph_inode_info *ci = ceph_inode(inode);
	return fscache_maybe_release_page(ci->fscache, page, gfp);
}

static inline void ceph_fscache_readpage_cancel(struct inode *inode,
						struct page *page)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	if (fscache_cookie_valid(ci->fscache) && PageFsCache(page))
		__fscache_uncache_page(ci->fscache, page);
}

static inline void ceph_fscache_readpages_cancel(struct inode *inode,
						 struct list_head *pages)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	return fscache_readpages_cancel(ci->fscache, pages);
}

static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
{
	ci->i_fscache_gen = ci->i_rdcache_gen - 1;
}

#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 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_revalidate_cookie(struct ceph_inode_info *ci)
{
}

static inline void ceph_fscache_uncache_page(struct inode *inode,
					     struct page *pages)
{
}

static inline int ceph_readpage_from_fscache(struct inode* inode,
					     struct page *page)
{
	return -ENOBUFS;
}

static inline int ceph_readpages_from_fscache(struct inode *inode,
					      struct address_space *mapping,
					      struct list_head *pages,
					      unsigned *nr_pages)
{
	return -ENOBUFS;
}

static inline void ceph_readpage_to_fscache(struct inode *inode,
					    struct page *page)
{
}

static inline void ceph_fscache_invalidate(struct inode *inode)
{
}

static inline void ceph_invalidate_fscache_page(struct inode *inode,
						struct page *page)
{
}

static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
{
	return 1;
}

static inline void ceph_fscache_readpage_cancel(struct inode *inode,
						struct page *page)
{
}

static inline void ceph_fscache_readpages_cancel(struct inode *inode,
						 struct list_head *pages)
{
}

static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
{
}

#endif

#endif
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 ([email protected])
99ccbd22 MT	7	*/
	8
	9	#ifndef _CEPH_CACHE_H
	10	#define _CEPH_CACHE_H
	11
	12	#ifdef CONFIG_CEPH_FSCACHE
	13
971f0bde MT	14	extern struct fscache_netfs ceph_cache_netfs;
971f0bde MT	15
99ccbd22 MT	16	int ceph_fscache_register(void);
	17	void ceph_fscache_unregister(void);
	18
82995cc6	19	int ceph_fscache_register_fs(struct ceph_fs_client* fsc, struct fs_context *fc);
99ccbd22 MT	20	void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
99ccbd22 MT	21
46b59b2b	22	void ceph_fscache_register_inode_cookie(struct inode *inode);
99ccbd22	23	void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci);
46b59b2b	24	void ceph_fscache_file_set_cookie(struct inode inode, struct file filp);
f7f7e7a0	25	void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci);
99ccbd22 MT	26
	27	int ceph_readpage_from_fscache(struct inode inode, struct page page);
	28	int ceph_readpages_from_fscache(struct inode *inode,
	29	struct address_space *mapping,
	30	struct list_head *pages,
	31	unsigned *nr_pages);
	32	void ceph_readpage_to_fscache(struct inode inode, struct page page);
	33	void ceph_invalidate_fscache_page(struct inode* inode, struct page *page);
f7f7e7a0 YZ	34
	35	static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
	36	{
	37	ci->fscache = NULL;
	38	ci->i_fscache_gen = 0;
	39	}
99ccbd22 MT	40
	41	static inline void ceph_fscache_invalidate(struct inode *inode)
	42	{
	43	fscache_invalidate(ceph_inode(inode)->fscache);
	44	}
	45
d4d3aa38 MT	46	static inline void ceph_fscache_uncache_page(struct inode *inode,
	47	struct page *page)
	48	{
	49	struct ceph_inode_info *ci = ceph_inode(inode);
	50	return fscache_uncache_page(ci->fscache, page);
	51	}
	52
99ccbd22 MT	53	static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
	54	{
	55	struct inode* inode = page->mapping->host;
	56	struct ceph_inode_info *ci = ceph_inode(inode);
	57	return fscache_maybe_release_page(ci->fscache, page, gfp);
	58	}
	59
3f42bc4b LW	60	static inline void ceph_fscache_readpage_cancel(struct inode *inode,
	61	struct page *page)
	62	{
	63	struct ceph_inode_info *ci = ceph_inode(inode);
	64	if (fscache_cookie_valid(ci->fscache) && PageFsCache(page))
	65	__fscache_uncache_page(ci->fscache, page);
	66	}
	67
76be778b MT	68	static inline void ceph_fscache_readpages_cancel(struct inode *inode,
	69	struct list_head *pages)
	70	{
	71	struct ceph_inode_info *ci = ceph_inode(inode);
	72	return fscache_readpages_cancel(ci->fscache, pages);
	73	}
	74
f7f7e7a0 YZ	75	static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
	76	{
	77	ci->i_fscache_gen = ci->i_rdcache_gen - 1;
	78	}
	79
99ccbd22 MT	80	#else
	81
	82	static inline int ceph_fscache_register(void)
	83	{
	84	return 0;
	85	}
	86
	87	static inline void ceph_fscache_unregister(void)
	88	{
	89	}
	90
82995cc6 DH	91	static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc,
82995cc6 DH	92	struct fs_context *fc)
99ccbd22 MT	93	{
	94	return 0;
	95	}
	96
	97	static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
	98	{
	99	}
	100
	101	static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
	102	{
	103	}
	104
46b59b2b YZ	105	static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
	106	{
	107	}
	108
	109	static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
	110	{
	111	}
	112
	113	static inline void ceph_fscache_file_set_cookie(struct inode *inode,
	114	struct file *filp)
99ccbd22 MT	115	{
	116	}
	117
f7f7e7a0 YZ	118	static inline void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci)
	119	{
	120	}
	121
d4d3aa38 MT	122	static inline void ceph_fscache_uncache_page(struct inode *inode,
d4d3aa38 MT	123	struct page *pages)
99ccbd22 MT	124	{
	125	}
	126
	127	static inline int ceph_readpage_from_fscache(struct inode* inode,
	128	struct page *page)
	129	{
	130	return -ENOBUFS;
	131	}
	132
	133	static inline int ceph_readpages_from_fscache(struct inode *inode,
	134	struct address_space *mapping,
	135	struct list_head *pages,
	136	unsigned *nr_pages)
	137	{
	138	return -ENOBUFS;
	139	}
	140
	141	static inline void ceph_readpage_to_fscache(struct inode *inode,
	142	struct page *page)
	143	{
	144	}
	145
	146	static inline void ceph_fscache_invalidate(struct inode *inode)
	147	{
	148	}
	149
	150	static inline void ceph_invalidate_fscache_page(struct inode *inode,
	151	struct page *page)
	152	{
	153	}
	154
	155	static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
	156	{
	157	return 1;
	158	}
	159
3f42bc4b LW	160	static inline void ceph_fscache_readpage_cancel(struct inode *inode,
	161	struct page *page)
	162	{
	163	}
	164
99ccbd22 MT	165	static inline void ceph_fscache_readpages_cancel(struct inode *inode,
	166	struct list_head *pages)
	167	{
	168	}
	169
f7f7e7a0	170	static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
99ccbd22 MT	171	{
	172	}
	173
	174	#endif
	175
	176	#endif