Contributors: 9
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| David Howells |
287 |
41.41% |
7 |
25.93% |
| Suresh Jayaraman |
252 |
36.36% |
7 |
25.93% |
| Steve French |
46 |
6.64% |
5 |
18.52% |
| Shyam Prasad N |
41 |
5.92% |
1 |
3.70% |
| Christoph Hellwig |
30 |
4.33% |
1 |
3.70% |
| Jeff Layton |
19 |
2.74% |
3 |
11.11% |
| Igor Mammedov |
6 |
0.87% |
1 |
3.70% |
| Arnd Bergmann |
6 |
0.87% |
1 |
3.70% |
| Linus Torvalds |
6 |
0.87% |
1 |
3.70% |
| Total |
693 |
|
27 |
|
/* 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/swap.h>
#include <linux/fscache.h>
#include "cifsglob.h"
/*
* Coherency data attached to CIFS volume within the cache
*/
struct cifs_fscache_volume_coherency_data {
__le64 resource_id; /* unique server resource id */
__le64 vol_create_time;
__le32 vol_serial_number;
} __packed;
/*
* Coherency data attached to CIFS inode within the cache.
*/
struct cifs_fscache_inode_coherency_data {
__le64 last_write_time_sec;
__le64 last_change_time_sec;
__le32 last_write_time_nsec;
__le32 last_change_time_nsec;
};
#ifdef CONFIG_CIFS_FSCACHE
/*
* fscache.c
*/
extern int cifs_fscache_get_super_cookie(struct cifs_tcon *);
extern void cifs_fscache_release_super_cookie(struct cifs_tcon *);
extern void cifs_fscache_get_inode_cookie(struct inode *inode);
extern void cifs_fscache_release_inode_cookie(struct inode *);
extern void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update);
static inline
void cifs_fscache_fill_coherency(struct inode *inode,
struct cifs_fscache_inode_coherency_data *cd)
{
struct timespec64 ctime = inode_get_ctime(inode);
struct timespec64 mtime = inode_get_mtime(inode);
memset(cd, 0, sizeof(*cd));
cd->last_write_time_sec = cpu_to_le64(mtime.tv_sec);
cd->last_write_time_nsec = cpu_to_le32(mtime.tv_nsec);
cd->last_change_time_sec = cpu_to_le64(ctime.tv_sec);
cd->last_change_time_nsec = cpu_to_le32(ctime.tv_nsec);
}
static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode)
{
return netfs_i_cookie(&CIFS_I(inode)->netfs);
}
static inline void cifs_invalidate_cache(struct inode *inode, unsigned int flags)
{
struct cifs_fscache_inode_coherency_data cd;
cifs_fscache_fill_coherency(inode, &cd);
fscache_invalidate(cifs_inode_cookie(inode), &cd,
i_size_read(inode), flags);
}
extern int __cifs_fscache_query_occupancy(struct inode *inode,
pgoff_t first, unsigned int nr_pages,
pgoff_t *_data_first,
unsigned int *_data_nr_pages);
static inline int cifs_fscache_query_occupancy(struct inode *inode,
pgoff_t first, unsigned int nr_pages,
pgoff_t *_data_first,
unsigned int *_data_nr_pages)
{
if (!cifs_inode_cookie(inode))
return -ENOBUFS;
return __cifs_fscache_query_occupancy(inode, first, nr_pages,
_data_first, _data_nr_pages);
}
extern int __cifs_readpage_from_fscache(struct inode *pinode, struct page *ppage);
extern void __cifs_readahead_to_fscache(struct inode *pinode, loff_t pos, size_t len);
static inline int cifs_readpage_from_fscache(struct inode *inode,
struct page *page)
{
if (cifs_inode_cookie(inode))
return __cifs_readpage_from_fscache(inode, page);
return -ENOBUFS;
}
static inline void cifs_readahead_to_fscache(struct inode *inode,
loff_t pos, size_t len)
{
if (cifs_inode_cookie(inode))
__cifs_readahead_to_fscache(inode, pos, len);
}
static inline bool cifs_fscache_enabled(struct inode *inode)
{
return fscache_cookie_enabled(cifs_inode_cookie(inode));
}
#else /* CONFIG_CIFS_FSCACHE */
static inline
void cifs_fscache_fill_coherency(struct inode *inode,
struct cifs_fscache_inode_coherency_data *cd)
{
}
static inline int cifs_fscache_get_super_cookie(struct cifs_tcon *tcon) { return 0; }
static inline void cifs_fscache_release_super_cookie(struct cifs_tcon *tcon) {}
static inline void cifs_fscache_get_inode_cookie(struct inode *inode) {}
static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {}
static inline void cifs_fscache_unuse_inode_cookie(struct inode *inode, bool update) {}
static inline struct fscache_cookie *cifs_inode_cookie(struct inode *inode) { return NULL; }
static inline void cifs_invalidate_cache(struct inode *inode, unsigned int flags) {}
static inline bool cifs_fscache_enabled(struct inode *inode) { return false; }
static inline int cifs_fscache_query_occupancy(struct inode *inode,
pgoff_t first, unsigned int nr_pages,
pgoff_t *_data_first,
unsigned int *_data_nr_pages)
{
*_data_first = ULONG_MAX;
*_data_nr_pages = 0;
return -ENOBUFS;
}
static inline int
cifs_readpage_from_fscache(struct inode *inode, struct page *page)
{
return -ENOBUFS;
}
static inline
void cifs_readahead_to_fscache(struct inode *inode, loff_t pos, size_t len) {}
#endif /* CONFIG_CIFS_FSCACHE */
#endif /* _CIFS_FSCACHE_H */