linux/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

#include <linux/netfs.h>

#ifdef CONFIG_CEPH_FSCACHE
#include <linux/fscache.h>

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_use_cookie(struct inode *inode, bool will_modify);
void ceph_fscache_unuse_cookie(struct inode *inode, bool update);

void ceph_fscache_update(struct inode *inode);
void ceph_fscache_invalidate(struct inode *inode, bool dio_write);

static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
{ … }

static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
{ … }

static inline int ceph_fscache_unpin_writeback(struct inode *inode,
						struct writeback_control *wbc)
{ … }

#define ceph_fscache_dirty_folio …

static inline bool ceph_is_cache_enabled(struct inode *inode)
{ … }

#else /* CONFIG_CEPH_FSCACHE */
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_register_inode_cookie(struct inode *inode)
{
}

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

static inline void ceph_fscache_use_cookie(struct inode *inode, bool will_modify)
{
}

static inline void ceph_fscache_unuse_cookie(struct inode *inode, bool update)
{
}

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

static inline void ceph_fscache_invalidate(struct inode *inode, bool dio_write)
{
}

static inline struct fscache_cookie *ceph_fscache_cookie(struct ceph_inode_info *ci)
{
	return NULL;
}

static inline void ceph_fscache_resize(struct inode *inode, loff_t to)
{
}

static inline int ceph_fscache_unpin_writeback(struct inode *inode,
					       struct writeback_control *wbc)
{
	return 0;
}

#define ceph_fscache_dirty_folio …

static inline bool ceph_is_cache_enabled(struct inode *inode)
{
	return false;
}
#endif /* CONFIG_CEPH_FSCACHE */

#endif