Release 4.11 fs/nfs/fscache.h
/* NFS filesystem cache interface definitions
*
* Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef _NFS_FSCACHE_H
#define _NFS_FSCACHE_H
#include <linux/nfs_fs.h>
#include <linux/nfs_mount.h>
#include <linux/nfs4_mount.h>
#include <linux/fscache.h>
#ifdef CONFIG_NFS_FSCACHE
/*
* set of NFS FS-Cache objects that form a superblock key
*/
struct nfs_fscache_key {
struct rb_node node;
struct nfs_client *nfs_client; /* the server */
/* the elements of the unique key - as used by nfs_compare_super() and
* nfs_compare_mount_options() to distinguish superblocks */
struct {
struct {
unsigned long s_flags; /* various flags
* (& NFS_MS_MASK) */
}
super;
struct {
struct nfs_fsid fsid;
int flags;
unsigned int rsize; /* read size */
unsigned int wsize; /* write size */
unsigned int acregmin; /* attr cache timeouts */
unsigned int acregmax;
unsigned int acdirmin;
unsigned int acdirmax;
}
nfs_server;
struct {
rpc_authflavor_t au_flavor;
}
rpc_auth;
/* uniquifier - can be used if nfs_server.flags includes
* NFS_MOUNT_UNSHARED */
u8 uniq_len;
char uniquifier[0];
}
key;
};
/*
* fscache-index.c
*/
extern struct fscache_netfs nfs_fscache_netfs;
extern const struct fscache_cookie_def nfs_fscache_server_index_def;
extern const struct fscache_cookie_def nfs_fscache_super_index_def;
extern const struct fscache_cookie_def nfs_fscache_inode_object_def;
extern int nfs_fscache_register(void);
extern void nfs_fscache_unregister(void);
/*
* fscache.c
*/
extern void nfs_fscache_get_client_cookie(struct nfs_client *);
extern void nfs_fscache_release_client_cookie(struct nfs_client *);
extern void nfs_fscache_get_super_cookie(struct super_block *, const char *, int);
extern void nfs_fscache_release_super_cookie(struct super_block *);
extern void nfs_fscache_init_inode(struct inode *);
extern void nfs_fscache_clear_inode(struct inode *);
extern void nfs_fscache_open_file(struct inode *, struct file *);
extern void __nfs_fscache_invalidate_page(struct page *, struct inode *);
extern int nfs_fscache_release_page(struct page *, gfp_t);
extern int __nfs_readpage_from_fscache(struct nfs_open_context *,
struct inode *, struct page *);
extern int __nfs_readpages_from_fscache(struct nfs_open_context *,
struct inode *, struct address_space *,
struct list_head *, unsigned *);
extern void __nfs_readpage_to_fscache(struct inode *, struct page *, int);
/*
* wait for a page to complete writing to the cache
*/
static inline void nfs_fscache_wait_on_page_write(struct nfs_inode *nfsi,
struct page *page)
{
if (PageFsCache(page))
fscache_wait_on_page_write(nfsi->fscache, page);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
/*
* release the caching state associated with a page if undergoing complete page
* invalidation
*/
static inline void nfs_fscache_invalidate_page(struct page *page,
struct inode *inode)
{
if (PageFsCache(page))
__nfs_fscache_invalidate_page(page, inode);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
/*
* Retrieve a page from an inode data storage object.
*/
static inline int nfs_readpage_from_fscache(struct nfs_open_context *ctx,
struct inode *inode,
struct page *page)
{
if (NFS_I(inode)->fscache)
return __nfs_readpage_from_fscache(ctx, inode, page);
return -ENOBUFS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 45 | 100.00% | 1 | 100.00% |
| Total | 45 | 100.00% | 1 | 100.00% |
/*
* Retrieve a set of pages from an inode data storage object.
*/
static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx,
struct inode *inode,
struct address_space *mapping,
struct list_head *pages,
unsigned *nr_pages)
{
if (NFS_I(inode)->fscache)
return __nfs_readpages_from_fscache(ctx, inode, mapping, pages,
nr_pages);
return -ENOBUFS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 58 | 100.00% | 1 | 100.00% |
| Total | 58 | 100.00% | 1 | 100.00% |
/*
* Store a page newly fetched from the server in an inode data storage object
* in the cache.
*/
static inline void nfs_readpage_to_fscache(struct inode *inode,
struct page *page,
int sync)
{
if (PageFsCache(page))
__nfs_readpage_to_fscache(inode, page, sync);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
/*
* Invalidate the contents of fscache for this inode. This will not sleep.
*/
static inline void nfs_fscache_invalidate(struct inode *inode)
{
fscache_invalidate(NFS_I(inode)->fscache);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
/*
* Wait for an object to finish being invalidated.
*/
static inline void nfs_fscache_wait_on_invalidate(struct inode *inode)
{
fscache_wait_on_invalidate(NFS_I(inode)->fscache);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
/*
* indicate the client caching state as readable text
*/
static inline const char *nfs_server_fscache_state(struct nfs_server *server)
{
if (server->fscache && (server->options & NFS_OPTION_FSCACHE))
return "yes";
return "no ";
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 34 | 100.00% | 1 | 100.00% |
| Total | 34 | 100.00% | 1 | 100.00% |
#else /* CONFIG_NFS_FSCACHE */
static inline int nfs_fscache_register(void) { return 0; }
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 12 | 100.00% | 1 | 100.00% |
| Total | 12 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_unregister(void) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 8 | 100.00% | 1 | 100.00% |
| Total | 8 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_get_client_cookie(struct nfs_client *clp) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_release_client_cookie(struct nfs_client *clp) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_release_super_cookie(struct super_block *sb) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_init_inode(struct inode *inode) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 11 | 100.00% | 2 | 100.00% |
| Total | 11 | 100.00% | 2 | 100.00% |
static inline void nfs_fscache_clear_inode(struct inode *inode) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 11 | 100.00% | 2 | 100.00% |
| Total | 11 | 100.00% | 2 | 100.00% |
static inline void nfs_fscache_open_file(struct inode *inode,
struct file *filp) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 16 | 100.00% | 2 | 100.00% |
| Total | 16 | 100.00% | 2 | 100.00% |
static inline int nfs_fscache_release_page(struct page *page, gfp_t gfp)
{
return 1; /* True: may release page */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_invalidate_page(struct page *page,
struct inode *inode) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_wait_on_page_write(struct nfs_inode *nfsi,
struct page *page) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline int nfs_readpage_from_fscache(struct nfs_open_context *ctx,
struct inode *inode,
struct page *page)
{
return -ENOBUFS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 26 | 100.00% | 1 | 100.00% |
| Total | 26 | 100.00% | 1 | 100.00% |
static inline int nfs_readpages_from_fscache(struct nfs_open_context *ctx,
struct inode *inode,
struct address_space *mapping,
struct list_head *pages,
unsigned *nr_pages)
{
return -ENOBUFS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 35 | 100.00% | 1 | 100.00% |
| Total | 35 | 100.00% | 1 | 100.00% |
static inline void nfs_readpage_to_fscache(struct inode *inode,
struct page *page, int sync) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_invalidate(struct inode *inode) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline void nfs_fscache_wait_on_invalidate(struct inode *inode) {}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline const char *nfs_server_fscache_state(struct nfs_server *server)
{
return "no ";
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 17 | 100.00% | 1 | 100.00% |
| Total | 17 | 100.00% | 1 | 100.00% |
#endif /* CONFIG_NFS_FSCACHE */
#endif /* _NFS_FSCACHE_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 861 | 99.88% | 13 | 92.86% |
| Bryan Schumaker | 1 | 0.12% | 1 | 7.14% |
| Total | 862 | 100.00% | 14 | 100.00% |
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