[linux-2.6-block.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

#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);
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)
{
	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 (milosz@adfin.com)
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
	19	int ceph_fscache_register_fs(struct ceph_fs_client* fsc);
	20	void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc);
	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
	91	static inline int ceph_fscache_register_fs(struct ceph_fs_client* fsc)
	92	{
	93	return 0;
	94	}
	95
	96	static inline void ceph_fscache_unregister_fs(struct ceph_fs_client* fsc)
	97	{
	98	}
	99
	100	static inline void ceph_fscache_inode_init(struct ceph_inode_info *ci)
	101	{
	102	}
	103
46b59b2b YZ	104	static inline void ceph_fscache_register_inode_cookie(struct inode *inode)
	105	{
	106	}
	107
	108	static inline void ceph_fscache_unregister_inode_cookie(struct ceph_inode_info* ci)
	109	{
	110	}
	111
	112	static inline void ceph_fscache_file_set_cookie(struct inode *inode,
	113	struct file *filp)
99ccbd22 MT	114	{
	115	}
	116
f7f7e7a0 YZ	117	static inline void ceph_fscache_revalidate_cookie(struct ceph_inode_info *ci)
	118	{
	119	}
	120
d4d3aa38 MT	121	static inline void ceph_fscache_uncache_page(struct inode *inode,
d4d3aa38 MT	122	struct page *pages)
99ccbd22 MT	123	{
	124	}
	125
	126	static inline int ceph_readpage_from_fscache(struct inode* inode,
	127	struct page *page)
	128	{
	129	return -ENOBUFS;
	130	}
	131
	132	static inline int ceph_readpages_from_fscache(struct inode *inode,
	133	struct address_space *mapping,
	134	struct list_head *pages,
	135	unsigned *nr_pages)
	136	{
	137	return -ENOBUFS;
	138	}
	139
	140	static inline void ceph_readpage_to_fscache(struct inode *inode,
	141	struct page *page)
	142	{
	143	}
	144
	145	static inline void ceph_fscache_invalidate(struct inode *inode)
	146	{
	147	}
	148
	149	static inline void ceph_invalidate_fscache_page(struct inode *inode,
	150	struct page *page)
	151	{
	152	}
	153
	154	static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
	155	{
	156	return 1;
	157	}
	158
3f42bc4b LW	159	static inline void ceph_fscache_readpage_cancel(struct inode *inode,
	160	struct page *page)
	161	{
	162	}
	163
99ccbd22 MT	164	static inline void ceph_fscache_readpages_cancel(struct inode *inode,
	165	struct list_head *pages)
	166	{
	167	}
	168
f7f7e7a0	169	static inline void ceph_disable_fscache_readpage(struct ceph_inode_info *ci)
99ccbd22 MT	170	{
	171	}
	172
	173	#endif
	174
	175	#endif