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108 lines
3.3 KiB
108 lines
3.3 KiB
/* NFS filesystem cache interface definitions
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*
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* Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#ifndef _NFS_FSCACHE_H
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#define _NFS_FSCACHE_H
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#include <linux/nfs_fs.h>
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#include <linux/nfs_mount.h>
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#include <linux/nfs4_mount.h>
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#include <linux/fscache.h>
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#ifdef CONFIG_NFS_FSCACHE
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/*
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* set of NFS FS-Cache objects that form a superblock key
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*/
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struct nfs_fscache_key {
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struct rb_node node;
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struct nfs_client *nfs_client; /* the server */
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/* the elements of the unique key - as used by nfs_compare_super() and
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* nfs_compare_mount_options() to distinguish superblocks */
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struct {
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struct {
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unsigned long s_flags; /* various flags
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* (& NFS_MS_MASK) */
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} super;
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struct {
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struct nfs_fsid fsid;
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int flags;
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unsigned int rsize; /* read size */
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unsigned int wsize; /* write size */
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unsigned int acregmin; /* attr cache timeouts */
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unsigned int acregmax;
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unsigned int acdirmin;
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unsigned int acdirmax;
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} nfs_server;
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struct {
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rpc_authflavor_t au_flavor;
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} rpc_auth;
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/* uniquifier - can be used if nfs_server.flags includes
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* NFS_MOUNT_UNSHARED */
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u8 uniq_len;
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char uniquifier[0];
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} key;
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};
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/*
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* fscache-index.c
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*/
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extern struct fscache_netfs nfs_fscache_netfs;
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extern const struct fscache_cookie_def nfs_fscache_server_index_def;
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extern const struct fscache_cookie_def nfs_fscache_super_index_def;
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extern const struct fscache_cookie_def nfs_fscache_inode_object_def;
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extern int nfs_fscache_register(void);
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extern void nfs_fscache_unregister(void);
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/*
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* fscache.c
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*/
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extern void nfs_fscache_get_client_cookie(struct nfs_client *);
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extern void nfs_fscache_release_client_cookie(struct nfs_client *);
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extern void nfs_fscache_get_super_cookie(struct super_block *,
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struct nfs_parsed_mount_data *);
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extern void nfs_fscache_release_super_cookie(struct super_block *);
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extern void nfs_fscache_init_inode_cookie(struct inode *);
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extern void nfs_fscache_release_inode_cookie(struct inode *);
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extern void nfs_fscache_zap_inode_cookie(struct inode *);
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extern void nfs_fscache_set_inode_cookie(struct inode *, struct file *);
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extern void nfs_fscache_reset_inode_cookie(struct inode *);
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#else /* CONFIG_NFS_FSCACHE */
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static inline int nfs_fscache_register(void) { return 0; }
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static inline void nfs_fscache_unregister(void) {}
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static inline void nfs_fscache_get_client_cookie(struct nfs_client *clp) {}
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static inline void nfs_fscache_release_client_cookie(struct nfs_client *clp) {}
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static inline void nfs_fscache_get_super_cookie(
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struct super_block *sb,
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struct nfs_parsed_mount_data *data)
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{
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}
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static inline void nfs_fscache_release_super_cookie(struct super_block *sb) {}
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static inline void nfs_fscache_init_inode_cookie(struct inode *inode) {}
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static inline void nfs_fscache_release_inode_cookie(struct inode *inode) {}
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static inline void nfs_fscache_zap_inode_cookie(struct inode *inode) {}
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static inline void nfs_fscache_set_inode_cookie(struct inode *inode,
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struct file *filp) {}
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static inline void nfs_fscache_reset_inode_cookie(struct inode *inode) {}
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#endif /* CONFIG_NFS_FSCACHE */
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#endif /* _NFS_FSCACHE_H */
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