184 lines
5.4 KiB
C
184 lines
5.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 */
|
|
/*
|
|
* CIFS filesystem cache interface definitions
|
|
*
|
|
* Copyright (c) 2010 Novell, Inc.
|
|
* Authors(s): Suresh Jayaraman (sjayaraman@suse.de>
|
|
*
|
|
*/
|
|
#ifndef _CIFS_FSCACHE_H
|
|
#define _CIFS_FSCACHE_H
|
|
|
|
#include <linux/fscache.h>
|
|
|
|
#include "cifsglob.h"
|
|
|
|
#ifdef CONFIG_CIFS_FSCACHE
|
|
|
|
/*
|
|
* Auxiliary data attached to CIFS superblock within the cache
|
|
*/
|
|
struct cifs_fscache_super_auxdata {
|
|
u64 resource_id; /* unique server resource id */
|
|
__le64 vol_create_time;
|
|
u32 vol_serial_number;
|
|
} __packed;
|
|
|
|
/*
|
|
* Auxiliary data attached to CIFS inode within the cache
|
|
*/
|
|
struct cifs_fscache_inode_auxdata {
|
|
u64 last_write_time_sec;
|
|
u64 last_change_time_sec;
|
|
u32 last_write_time_nsec;
|
|
u32 last_change_time_nsec;
|
|
u64 eof;
|
|
};
|
|
|
|
/*
|
|
* cache.c
|
|
*/
|
|
extern struct fscache_netfs cifs_fscache_netfs;
|
|
extern const struct fscache_cookie_def cifs_fscache_server_index_def;
|
|
extern const struct fscache_cookie_def cifs_fscache_super_index_def;
|
|
extern const struct fscache_cookie_def cifs_fscache_inode_object_def;
|
|
|
|
extern int cifs_fscache_register(void);
|
|
extern void cifs_fscache_unregister(void);
|
|
|
|
/*
|
|
* fscache.c
|
|
*/
|
|
extern void cifs_fscache_get_client_cookie(struct TCP_Server_Info *);
|
|
extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *);
|
|
extern void cifs_fscache_get_super_cookie(struct cifs_tcon *);
|
|
extern void cifs_fscache_release_super_cookie(struct cifs_tcon *);
|
|
|
|
extern void cifs_fscache_release_inode_cookie(struct inode *);
|
|
extern void cifs_fscache_update_inode_cookie(struct inode *inode);
|
|
extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *);
|
|
extern void cifs_fscache_reset_inode_cookie(struct inode *);
|
|
|
|
extern void __cifs_fscache_invalidate_page(struct page *, struct inode *);
|
|
extern void __cifs_fscache_wait_on_page_write(struct inode *inode, struct page *page);
|
|
extern void __cifs_fscache_uncache_page(struct inode *inode, struct page *page);
|
|
extern int cifs_fscache_release_page(struct page *page, gfp_t gfp);
|
|
extern int __cifs_readpage_from_fscache(struct inode *, struct page *);
|
|
extern int __cifs_readpages_from_fscache(struct inode *,
|
|
struct address_space *,
|
|
struct list_head *,
|
|
unsigned *);
|
|
extern void __cifs_fscache_readpages_cancel(struct inode *, struct list_head *);
|
|
|
|
extern void __cifs_readpage_to_fscache(struct inode *, struct page *);
|
|
|
|
static inline void cifs_fscache_invalidate_page(struct page *page,
|
|
struct inode *inode)
|
|
{
|
|
if (PageFsCache(page))
|
|
__cifs_fscache_invalidate_page(page, inode);
|
|
}
|
|
|
|
static inline void cifs_fscache_wait_on_page_write(struct inode *inode,
|
|
struct page *page)
|
|
{
|
|
if (PageFsCache(page))
|
|
__cifs_fscache_wait_on_page_write(inode, page);
|
|
}
|
|
|
|
static inline void cifs_fscache_uncache_page(struct inode *inode,
|
|
struct page *page)
|
|
{
|
|
if (PageFsCache(page))
|
|
__cifs_fscache_uncache_page(inode, page);
|
|
}
|
|
|
|
static inline int cifs_readpage_from_fscache(struct inode *inode,
|
|
struct page *page)
|
|
{
|
|
if (CIFS_I(inode)->fscache)
|
|
return __cifs_readpage_from_fscache(inode, page);
|
|
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
static inline int cifs_readpages_from_fscache(struct inode *inode,
|
|
struct address_space *mapping,
|
|
struct list_head *pages,
|
|
unsigned *nr_pages)
|
|
{
|
|
if (CIFS_I(inode)->fscache)
|
|
return __cifs_readpages_from_fscache(inode, mapping, pages,
|
|
nr_pages);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
static inline void cifs_readpage_to_fscache(struct inode *inode,
|
|
struct page *page)
|
|
{
|
|
if (PageFsCache(page))
|
|
__cifs_readpage_to_fscache(inode, page);
|
|
}
|
|
|
|
static inline void cifs_fscache_readpages_cancel(struct inode *inode,
|
|
struct list_head *pages)
|
|
{
|
|
if (CIFS_I(inode)->fscache)
|
|
return __cifs_fscache_readpages_cancel(inode, pages);
|
|
}
|
|
|
|
#else /* CONFIG_CIFS_FSCACHE */
|
|
static inline int cifs_fscache_register(void) { return 0; }
|
|
static inline void cifs_fscache_unregister(void) {}
|
|
|
|
static inline void
|
|
cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) {}
|
|
static inline void
|
|
cifs_fscache_release_client_cookie(struct TCP_Server_Info *server) {}
|
|
static inline void cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) {}
|
|
static inline void
|
|
cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}
|
|
|
|
static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
|
|
static inline void cifs_fscache_update_inode_cookie(struct inode *inode) {}
|
|
static inline void cifs_fscache_set_inode_cookie(struct inode *inode,
|
|
struct file *filp) {}
|
|
static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {}
|
|
static inline int cifs_fscache_release_page(struct page *page, gfp_t gfp)
|
|
{
|
|
return 1; /* May release page */
|
|
}
|
|
|
|
static inline void cifs_fscache_invalidate_page(struct page *page,
|
|
struct inode *inode) {}
|
|
static inline void cifs_fscache_wait_on_page_write(struct inode *inode,
|
|
struct page *page) {}
|
|
static inline void cifs_fscache_uncache_page(struct inode *inode,
|
|
struct page *page) {}
|
|
|
|
static inline int
|
|
cifs_readpage_from_fscache(struct inode *inode, struct page *page)
|
|
{
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
static inline int cifs_readpages_from_fscache(struct inode *inode,
|
|
struct address_space *mapping,
|
|
struct list_head *pages,
|
|
unsigned *nr_pages)
|
|
{
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
static inline void cifs_readpage_to_fscache(struct inode *inode,
|
|
struct page *page) {}
|
|
|
|
static inline void cifs_fscache_readpages_cancel(struct inode *inode,
|
|
struct list_head *pages)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_CIFS_FSCACHE */
|
|
|
|
#endif /* _CIFS_FSCACHE_H */
|