projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 8ec442ae DH |
1 | /* NFS filesystem cache interface definitions |
| 2 | * | |
| 3 | * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells (dhowells@redhat.com) | |
| 5 | * | |
| 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. | |
| 10 | */ | |
| 11 | ||
| 12 | #ifndef _NFS_FSCACHE_H | |
| 13 | #define _NFS_FSCACHE_H | |
| 14 | ||
| 15 | #include <linux/nfs_fs.h> | |
| 16 | #include <linux/nfs_mount.h> | |
| 17 | #include <linux/nfs4_mount.h> | |
| 18 | #include <linux/fscache.h> | |
| 19 | ||
| 20 | #ifdef CONFIG_NFS_FSCACHE | |
| 21 | ||
| 08734048 DH |
22 | /* |
| 23 | * set of NFS FS-Cache objects that form a superblock key | |
| 24 | */ | |
| 25 | struct nfs_fscache_key { | |
| 26 | struct rb_node node; | |
| 27 | struct nfs_client *nfs_client; /* the server */ | |
| 28 | ||
| 29 | /* the elements of the unique key - as used by nfs_compare_super() and | |
| 30 | * nfs_compare_mount_options() to distinguish superblocks */ | |
| 31 | struct { | |
| 32 | struct { | |
| 33 | unsigned long s_flags; /* various flags | |
| 34 | * (& NFS_MS_MASK) */ | |
| 35 | } super; | |
| 36 | ||
| 37 | struct { | |
| 38 | struct nfs_fsid fsid; | |
| 39 | int 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; | |
| 46 | } nfs_server; | |
| 47 | ||
| 48 | struct { | |
| 49 | rpc_authflavor_t au_flavor; | |
| 50 | } rpc_auth; | |
| 51 | ||
| 52 | /* uniquifier - can be used if nfs_server.flags includes | |
| 53 | * NFS_MOUNT_UNSHARED */ | |
| 54 | u8 uniq_len; | |
| 55 | char uniquifier[0]; | |
| 56 | } key; | |
| 57 | }; | |
| 58 | ||
| 8ec442ae DH |
59 | /* |
| 60 | * fscache-index.c | |
| 61 | */ | |
| 62 | extern struct fscache_netfs nfs_fscache_netfs; | |
| 14727281 | 63 | extern const struct fscache_cookie_def nfs_fscache_server_index_def; |
| 08734048 | 64 | extern const struct fscache_cookie_def nfs_fscache_super_index_def; |
| 10329a5d | 65 | extern const struct fscache_cookie_def nfs_fscache_inode_object_def; |
| 8ec442ae DH |
66 | |
| 67 | extern int nfs_fscache_register(void); | |
| 68 | extern void nfs_fscache_unregister(void); | |
| 69 | ||
| 14727281 DH |
70 | /* |
| 71 | * fscache.c | |
| 72 | */ | |
| 73 | extern void nfs_fscache_get_client_cookie(struct nfs_client *); | |
| 74 | extern void nfs_fscache_release_client_cookie(struct nfs_client *); | |
| 75 | ||
| 08734048 DH |
76 | extern void nfs_fscache_get_super_cookie(struct super_block *, |
| 77 | struct nfs_parsed_mount_data *); | |
| 78 | extern void nfs_fscache_release_super_cookie(struct super_block *); | |
| 79 | ||
| ef79c097 DH |
80 | extern void nfs_fscache_init_inode_cookie(struct inode *); |
| 81 | extern void nfs_fscache_release_inode_cookie(struct inode *); | |
| 82 | extern void nfs_fscache_zap_inode_cookie(struct inode *); | |
| 83 | extern void nfs_fscache_set_inode_cookie(struct inode *, struct file *); | |
| 84 | extern void nfs_fscache_reset_inode_cookie(struct inode *); | |
| 85 | ||
| 8ec442ae DH |
86 | #else /* CONFIG_NFS_FSCACHE */ |
| 87 | static inline int nfs_fscache_register(void) { return 0; } | |
| 88 | static inline void nfs_fscache_unregister(void) {} | |
| 89 | ||
| 14727281 DH |
90 | static inline void nfs_fscache_get_client_cookie(struct nfs_client *clp) {} |
| 91 | static inline void nfs_fscache_release_client_cookie(struct nfs_client *clp) {} | |
| 92 | ||
| 08734048 DH |
93 | static inline void nfs_fscache_get_super_cookie( |
| 94 | struct super_block *sb, | |
| 95 | struct nfs_parsed_mount_data *data) | |
| 96 | { | |
| 97 | } | |
| 98 | static inline void nfs_fscache_release_super_cookie(struct super_block *sb) {} | |
| 99 | ||
| ef79c097 DH |
100 | static inline void nfs_fscache_init_inode_cookie(struct inode *inode) {} |
| 101 | static inline void nfs_fscache_release_inode_cookie(struct inode *inode) {} | |
| 102 | static inline void nfs_fscache_zap_inode_cookie(struct inode *inode) {} | |
| 103 | static inline void nfs_fscache_set_inode_cookie(struct inode *inode, | |
| 104 | struct file *filp) {} | |
| 105 | static inline void nfs_fscache_reset_inode_cookie(struct inode *inode) {} | |
| 106 | ||
| 8ec442ae DH |
107 | #endif /* CONFIG_NFS_FSCACHE */ |
| 108 | #endif /* _NFS_FSCACHE_H */ |