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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
#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 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_resize(struct inode *inode, loff_t to)
{
struct ceph_inode_info *ci = ceph_inode(inode);
struct fscache_cookie *cookie = ceph_fscache_cookie(ci);
if (cookie) {
ceph_fscache_use_cookie(inode, true);
fscache_resize_cookie(cookie, to);
ceph_fscache_unuse_cookie(inode, true);
}
}
static inline void ceph_fscache_unpin_writeback(struct inode *inode,
struct writeback_control *wbc)
{
fscache_unpin_writeback(wbc, ceph_fscache_cookie(ceph_inode(inode)));
}
static inline int ceph_fscache_set_page_dirty(struct page *page)
{
struct inode *inode = page->mapping->host;
struct ceph_inode_info *ci = ceph_inode(inode);
return fscache_set_page_dirty(page, ceph_fscache_cookie(ci));
}
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->cache_resources, cookie);
}
static inline bool ceph_is_cache_enabled(struct inode *inode)
{
return fscache_cookie_enabled(ceph_fscache_cookie(ceph_inode(inode)));
}
static inline void ceph_fscache_note_page_release(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
fscache_note_page_release(ceph_fscache_cookie(ci));
}
#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_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_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 void ceph_fscache_unpin_writeback(struct inode *inode,
struct writeback_control *wbc)
{
}
static inline int ceph_fscache_set_page_dirty(struct page *page)
{
return __set_page_dirty_nobuffers(page);
}
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;
}
static inline void ceph_fscache_note_page_release(struct inode *inode)
{
}
#endif /* CONFIG_CEPH_FSCACHE */
#endif
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