1 /* NFS filesystem cache interface definitions
3 * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public Licence
8 * as published by the Free Software Foundation; either version
9 * 2 of the Licence, or (at your option) any later version.
12 #ifndef _NFS_FSCACHE_H
13 #define _NFS_FSCACHE_H
15 #include <linux/nfs_fs.h>
16 #include <linux/nfs_mount.h>
17 #include <linux/nfs4_mount.h>
18 #include <linux/fscache.h>
20 #ifdef CONFIG_NFS_FSCACHE
23 * set of NFS FS-Cache objects that form a superblock key
25 struct nfs_fscache_key {
27 struct nfs_client *nfs_client; /* the server */
29 /* the elements of the unique key - as used by nfs_compare_super() and
30 * nfs_compare_mount_options() to distinguish superblocks */
33 unsigned long s_flags; /* various flags
40 unsigned int rsize; /* read size */
41 unsigned int wsize; /* write size */
42 unsigned int acregmin; /* attr cache timeouts */
43 unsigned int acregmax;
44 unsigned int acdirmin;
45 unsigned int acdirmax;
49 rpc_authflavor_t au_flavor;
52 /* uniquifier - can be used if nfs_server.flags includes
53 * NFS_MOUNT_UNSHARED */
62 extern struct fscache_netfs nfs_fscache_netfs;
63 extern const struct fscache_cookie_def nfs_fscache_server_index_def;
64 extern const struct fscache_cookie_def nfs_fscache_super_index_def;
66 extern int nfs_fscache_register(void);
67 extern void nfs_fscache_unregister(void);
72 extern void nfs_fscache_get_client_cookie(struct nfs_client *);
73 extern void nfs_fscache_release_client_cookie(struct nfs_client *);
75 extern void nfs_fscache_get_super_cookie(struct super_block *,
76 struct nfs_parsed_mount_data *);
77 extern void nfs_fscache_release_super_cookie(struct super_block *);
79 #else /* CONFIG_NFS_FSCACHE */
80 static inline int nfs_fscache_register(void) { return 0; }
81 static inline void nfs_fscache_unregister(void) {}
83 static inline void nfs_fscache_get_client_cookie(struct nfs_client *clp) {}
84 static inline void nfs_fscache_release_client_cookie(struct nfs_client *clp) {}
86 static inline void nfs_fscache_get_super_cookie(
87 struct super_block *sb,
88 struct nfs_parsed_mount_data *data)
91 static inline void nfs_fscache_release_super_cookie(struct super_block *sb) {}
93 #endif /* CONFIG_NFS_FSCACHE */
94 #endif /* _NFS_FSCACHE_H */