blob: 04963063e6200023dd0524f023b30f4973317df1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/include/linux/nfs_fs.h
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * OS-specific nfs filesystem definitions and declarations
7 */
8
9#ifndef _LINUX_NFS_FS_H
10#define _LINUX_NFS_FS_H
11
Jeff Garzike18fa702006-09-24 11:13:19 -040012#include <linux/magic.h>
13
David Woodhouse7f1cbe52006-09-12 20:36:02 -070014/*
15 * Enable debugging support for nfs client.
16 * Requires RPC_DEBUG.
17 */
18#ifdef RPC_DEBUG
19# define NFS_DEBUG
20#endif
21
22/* Default timeout values */
23#define NFS_MAX_UDP_TIMEOUT (60*HZ)
24#define NFS_MAX_TCP_TIMEOUT (600*HZ)
25
26/*
David Woodhouse7f1cbe52006-09-12 20:36:02 -070027 * When flushing a cluster of dirty pages, there can be different
28 * strategies:
29 */
30#define FLUSH_SYNC 1 /* file being synced, or contention */
31#define FLUSH_STABLE 4 /* commit to stable storage */
32#define FLUSH_LOWPRI 8 /* low priority background flush */
33#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
34#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */
35#define FLUSH_INVALIDATE 64 /* Invalidate the page cache */
Trond Myklebust4d770cc2006-12-05 00:35:41 -050036#define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */
David Woodhouse7f1cbe52006-09-12 20:36:02 -070037
38#ifdef __KERNEL__
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/in.h>
41#include <linux/mm.h>
42#include <linux/pagemap.h>
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040043#include <linux/rbtree.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/rwsem.h>
45#include <linux/wait.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/sunrpc/debug.h>
48#include <linux/sunrpc/auth.h>
49#include <linux/sunrpc/clnt.h>
50
51#include <linux/nfs.h>
52#include <linux/nfs2.h>
53#include <linux/nfs3.h>
54#include <linux/nfs4.h>
55#include <linux/nfs_xdr.h>
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -040056
57#include <linux/nfs_fs_sb.h>
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#include <linux/rwsem.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <linux/mempool.h>
61
62/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 * These are the default flags for swap requests
64 */
65#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 * NFSv3/v4 Access mode cache entry
69 */
70struct nfs_access_entry {
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040071 struct rb_node rb_node;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -040072 struct list_head lru;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 unsigned long jiffies;
74 struct rpc_cred * cred;
75 int mask;
76};
77
78struct nfs4_state;
79struct nfs_open_context {
80 atomic_t count;
Trond Myklebustb92dccf2006-03-20 13:44:03 -050081 struct vfsmount *vfsmnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct dentry *dentry;
83 struct rpc_cred *cred;
84 struct nfs4_state *state;
85 fl_owner_t lockowner;
86 int mode;
87 int error;
88
89 struct list_head list;
Olivier Galibert00a92642005-06-22 17:16:29 +000090
Olivier Galibert00a92642005-06-22 17:16:29 +000091 __u64 dir_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092};
93
94/*
95 * NFSv4 delegation
96 */
97struct nfs_delegation;
98
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +000099struct posix_acl;
100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101/*
102 * nfs fs inode data in memory
103 */
104struct nfs_inode {
105 /*
106 * The 64bit 'inode number'
107 */
108 __u64 fileid;
109
110 /*
111 * NFS file handle
112 */
113 struct nfs_fh fh;
114
115 /*
116 * Various flags
117 */
Chuck Lever412d5822005-08-18 11:24:11 -0700118 unsigned long flags; /* atomic bit ops */
119 unsigned long cache_validity; /* bit mask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121 /*
Goldwyn Rodrigues24bd68f2006-03-20 13:44:11 -0500122 * read_cache_jiffies is when we started read-caching this inode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 * attrtimeo is for how long the cached information is assumed
124 * to be valid. A successful attribute revalidation doubles
125 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
126 * acregmin/acdirmin.
127 *
128 * We need to revalidate the cached attrs for this inode if
129 *
130 * jiffies - read_cache_jiffies > attrtimeo
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 unsigned long read_cache_jiffies;
133 unsigned long attrtimeo;
134 unsigned long attrtimeo_timestamp;
135 __u64 change_attr; /* v4 only */
136
Trond Myklebust33801142005-10-27 22:12:39 -0400137 unsigned long last_updated;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 /* "Generation counter" for the attribute cache. This is
139 * bumped whenever we update the metadata on the
140 * server.
141 */
142 unsigned long cache_change_attribute;
143 /*
144 * Counter indicating the number of outstanding requests that
145 * will cause a file data update.
146 */
147 atomic_t data_updates;
148
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400149 struct rb_root access_cache;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -0400150 struct list_head access_cache_entry_lru;
151 struct list_head access_cache_inode_lru;
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000152#ifdef CONFIG_NFS_V3_ACL
153 struct posix_acl *acl_access;
154 struct posix_acl *acl_default;
155#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
157 /*
158 * This is the cookie verifier used for NFSv3 readdir
159 * operations
160 */
Al Virobc4785c2006-10-19 23:28:51 -0700161 __be32 cookieverf[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 /*
164 * This is the list of dirty unwritten pages.
165 */
166 spinlock_t req_lock;
167 struct list_head dirty;
168 struct list_head commit;
169 struct radix_tree_root nfs_page_tree;
170
171 unsigned int ndirty,
172 ncommit,
173 npages;
174
175 /* Open contexts for shared mmap writes */
176 struct list_head open_files;
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178#ifdef CONFIG_NFS_V4
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +0000179 struct nfs4_cached_acl *nfs4_acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 /* NFSv4 state */
181 struct list_head open_states;
182 struct nfs_delegation *delegation;
183 int delegation_state;
184 struct rw_semaphore rwsem;
185#endif /* CONFIG_NFS_V4*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 struct inode vfs_inode;
187};
188
189/*
Chuck Lever55296802005-08-18 11:24:09 -0700190 * Cache validity bit flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 */
Chuck Lever55296802005-08-18 11:24:09 -0700192#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
193#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
194#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
195#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
196#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
197#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
198
199/*
Chuck Lever412d5822005-08-18 11:24:11 -0700200 * Bit offsets in flags field
Chuck Lever55296802005-08-18 11:24:09 -0700201 */
Chuck Lever412d5822005-08-18 11:24:11 -0700202#define NFS_INO_REVALIDATING (0) /* revalidating attrs */
203#define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */
204#define NFS_INO_STALE (2) /* possible stale inode */
Trond Myklebustcfcea3e2006-07-25 11:28:18 -0400205#define NFS_INO_ACL_LRU_SET (3) /* Inode is on the LRU list */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207static inline struct nfs_inode *NFS_I(struct inode *inode)
208{
209 return container_of(inode, struct nfs_inode, vfs_inode);
210}
211#define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info))
212
213#define NFS_FH(inode) (&NFS_I(inode)->fh)
214#define NFS_SERVER(inode) (NFS_SB(inode->i_sb))
215#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client)
David Howells8fa5c002006-08-22 20:06:12 -0400216#define NFS_PROTO(inode) (NFS_SERVER(inode)->nfs_client->rpc_ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf)
218#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies)
219#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr)
220#define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo)
221#define NFS_MINATTRTIMEO(inode) \
222 (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
223 : NFS_SERVER(inode)->acregmin)
224#define NFS_MAXATTRTIMEO(inode) \
225 (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
226 : NFS_SERVER(inode)->acregmax)
227#define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp)
228
229#define NFS_FLAGS(inode) (NFS_I(inode)->flags)
Chuck Lever412d5822005-08-18 11:24:11 -0700230#define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232#define NFS_FILEID(inode) (NFS_I(inode)->fileid)
233
234static inline int nfs_caches_unstable(struct inode *inode)
235{
236 return atomic_read(&NFS_I(inode)->data_updates) != 0;
237}
238
Trond Myklebustdecf4912005-10-27 22:12:39 -0400239static inline void nfs_mark_for_revalidate(struct inode *inode)
240{
Trond Myklebust38478b22006-05-25 01:40:57 -0400241 struct nfs_inode *nfsi = NFS_I(inode);
242
Trond Myklebustdecf4912005-10-27 22:12:39 -0400243 spin_lock(&inode->i_lock);
Trond Myklebust38478b22006-05-25 01:40:57 -0400244 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
245 if (S_ISDIR(inode->i_mode))
246 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400247 spin_unlock(&inode->i_lock);
248}
249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250static inline void NFS_CACHEINV(struct inode *inode)
251{
Trond Myklebustdecf4912005-10-27 22:12:39 -0400252 if (!nfs_caches_unstable(inode))
253 nfs_mark_for_revalidate(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254}
255
256static inline int nfs_server_capable(struct inode *inode, int cap)
257{
258 return NFS_SERVER(inode)->caps & cap;
259}
260
261static inline int NFS_USE_READDIRPLUS(struct inode *inode)
262{
Chuck Lever412d5822005-08-18 11:24:11 -0700263 return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264}
265
266/**
267 * nfs_save_change_attribute - Returns the inode attribute change cookie
268 * @inode - pointer to inode
269 * The "change attribute" is updated every time we finish an operation
270 * that will result in a metadata change on the server.
271 */
272static inline long nfs_save_change_attribute(struct inode *inode)
273{
274 return NFS_I(inode)->cache_change_attribute;
275}
276
277/**
278 * nfs_verify_change_attribute - Detects NFS inode cache updates
279 * @inode - pointer to inode
280 * @chattr - previously saved change attribute
281 * Return "false" if metadata has been updated (or is in the process of
282 * being updated) since the change attribute was saved.
283 */
284static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
285{
286 return !nfs_caches_unstable(inode)
Trond Myklebust913a70f2005-10-27 22:12:38 -0400287 && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288}
289
290/*
291 * linux/fs/nfs/inode.c
292 */
Trond Myklebust29884df2005-12-13 16:13:54 -0500293extern int nfs_sync_mapping(struct address_space *mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700294extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295extern void nfs_zap_caches(struct inode *);
296extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
297 struct nfs_fattr *);
298extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400299extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
301extern int nfs_permission(struct inode *, int, struct nameidata *);
302extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
303extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400304extern void nfs_access_zap_cache(struct inode *inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305extern int nfs_open(struct inode *, struct file *);
306extern int nfs_release(struct inode *, struct file *);
307extern int nfs_attribute_timeout(struct inode *inode);
308extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
309extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
Trond Myklebust44b11872006-05-25 01:40:59 -0400310extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311extern int nfs_setattr(struct dentry *, struct iattr *);
Trond Myklebust65e43082005-08-16 11:49:44 -0400312extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313extern void nfs_begin_attr_update(struct inode *);
314extern void nfs_end_attr_update(struct inode *);
315extern void nfs_begin_data_update(struct inode *);
316extern void nfs_end_data_update(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
318extern void put_nfs_open_context(struct nfs_open_context *ctx);
Trond Myklebustd5308382005-11-04 15:33:38 -0500319extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
Al Viro5a874db2006-11-08 00:19:38 -0800322extern __be32 root_nfs_parse_addr(char *name); /*__init*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Trond Myklebust0e574af2005-10-27 22:12:38 -0400324static inline void nfs_fattr_init(struct nfs_fattr *fattr)
325{
326 fattr->valid = 0;
Trond Myklebust33801142005-10-27 22:12:39 -0400327 fattr->time_start = jiffies;
Trond Myklebust0e574af2005-10-27 22:12:38 -0400328}
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330/*
331 * linux/fs/nfs/file.c
332 */
333extern struct inode_operations nfs_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000334#ifdef CONFIG_NFS_V3
335extern struct inode_operations nfs3_file_inode_operations;
336#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800337extern const struct file_operations nfs_file_operations;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700338extern const struct address_space_operations nfs_file_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340static inline struct rpc_cred *nfs_file_cred(struct file *file)
341{
342 if (file != NULL) {
343 struct nfs_open_context *ctx;
344
345 ctx = (struct nfs_open_context*)file->private_data;
346 return ctx->cred;
347 }
348 return NULL;
349}
350
351/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000352 * linux/fs/nfs/xattr.c
353 */
354#ifdef CONFIG_NFS_V3_ACL
355extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
356extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
357extern int nfs3_setxattr(struct dentry *, const char *,
358 const void *, size_t, int);
359extern int nfs3_removexattr (struct dentry *, const char *name);
360#else
361# define nfs3_listxattr NULL
362# define nfs3_getxattr NULL
363# define nfs3_setxattr NULL
364# define nfs3_removexattr NULL
365#endif
366
367/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 * linux/fs/nfs/direct.c
369 */
370extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
371 unsigned long);
Badari Pulavarty027445c2006-09-30 23:28:46 -0700372extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
373 const struct iovec *iov, unsigned long nr_segs,
374 loff_t pos);
375extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
376 const struct iovec *iov, unsigned long nr_segs,
377 loff_t pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
379/*
380 * linux/fs/nfs/dir.c
381 */
382extern struct inode_operations nfs_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000383#ifdef CONFIG_NFS_V3
384extern struct inode_operations nfs3_dir_inode_operations;
385#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800386extern const struct file_operations nfs_dir_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387extern struct dentry_operations nfs_dentry_operations;
388
389extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
390
391/*
392 * linux/fs/nfs/symlink.c
393 */
394extern struct inode_operations nfs_symlink_inode_operations;
395
396/*
Trond Myklebusta72b4422006-01-03 09:55:41 +0100397 * linux/fs/nfs/sysctl.c
398 */
399#ifdef CONFIG_SYSCTL
400extern int nfs_register_sysctl(void);
401extern void nfs_unregister_sysctl(void);
402#else
Stephen Rothwell7fd105e2006-02-20 18:28:08 -0800403#define nfs_register_sysctl() 0
Trond Myklebusta72b4422006-01-03 09:55:41 +0100404#define nfs_unregister_sysctl() do { } while(0)
405#endif
406
407/*
Trond Myklebust55a97592006-06-09 09:34:19 -0400408 * linux/fs/nfs/namespace.c
409 */
Trond Myklebust51d8fa62006-06-09 09:34:20 -0400410extern struct list_head nfs_automount_list;
Trond Myklebust55a97592006-06-09 09:34:19 -0400411extern struct inode_operations nfs_mountpoint_inode_operations;
Manoj Naik6b97fd32006-06-09 09:34:29 -0400412extern struct inode_operations nfs_referral_inode_operations;
Trond Myklebust51d8fa62006-06-09 09:34:20 -0400413extern int nfs_mountpoint_expiry_timeout;
414extern void nfs_release_automount_timer(void);
Trond Myklebust55a97592006-06-09 09:34:19 -0400415
416/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 * linux/fs/nfs/unlink.c
418 */
419extern int nfs_async_unlink(struct dentry *);
420extern void nfs_complete_unlink(struct dentry *);
421
422/*
423 * linux/fs/nfs/write.c
424 */
425extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
426extern int nfs_writepages(struct address_space *, struct writeback_control *);
427extern int nfs_flush_incompatible(struct file *file, struct page *page);
428extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
Chuck Lever462d5b32006-03-20 13:44:32 -0500429extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
430extern void nfs_writedata_release(void *);
Trond Myklebust1a545332006-12-05 00:35:40 -0500431extern int nfs_set_page_dirty(struct page *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
433/*
434 * Try to write back everything synchronously (but check the
435 * return value!)
436 */
Trond Myklebust1c759502006-10-09 16:18:38 -0400437extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int);
438extern int nfs_sync_mapping_range(struct address_space *, loff_t, loff_t, int);
439extern int nfs_wb_all(struct inode *inode);
440extern int nfs_wb_page(struct inode *inode, struct page* page);
Trond Myklebust61822ab2006-12-05 00:35:42 -0500441extern int nfs_wb_page_priority(struct inode *inode, struct page* page, int how);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000443extern int nfs_commit_inode(struct inode *, int);
Trond Myklebust8aca67f2006-11-13 16:23:44 -0500444extern struct nfs_write_data *nfs_commit_alloc(void);
445extern void nfs_commit_free(struct nfs_write_data *wdata);
Trond Myklebustfad61492006-03-20 13:44:36 -0500446extern void nfs_commit_release(void *wdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447#else
448static inline int
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000449nfs_commit_inode(struct inode *inode, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450{
451 return 0;
452}
453#endif
454
455static inline int
456nfs_have_writebacks(struct inode *inode)
457{
458 return NFS_I(inode)->npages != 0;
459}
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400462 * Allocate nfs_write_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 */
Trond Myklebuste9f7bee2006-09-08 09:48:54 -0700464extern struct nfs_write_data *nfs_writedata_alloc(size_t len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466/*
467 * linux/fs/nfs/read.c
468 */
469extern int nfs_readpage(struct file *, struct page *);
470extern int nfs_readpages(struct file *, struct address_space *,
471 struct list_head *, unsigned);
Trond Myklebustec06c092006-03-20 13:44:27 -0500472extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
473extern void nfs_readdata_release(void *data);
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100474
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400476 * Allocate nfs_read_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 */
Trond Myklebuste9f7bee2006-09-08 09:48:54 -0700478extern struct nfs_read_data *nfs_readdata_alloc(size_t len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000481 * linux/fs/nfs3proc.c
482 */
483#ifdef CONFIG_NFS_V3_ACL
484extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
485extern int nfs3_proc_setacl(struct inode *inode, int type,
486 struct posix_acl *acl);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000487extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
488 mode_t mode);
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000489extern void nfs3_forget_cached_acls(struct inode *inode);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000490#else
491static inline int nfs3_proc_set_default_acl(struct inode *dir,
492 struct inode *inode,
493 mode_t mode)
494{
495 return 0;
496}
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000497
498static inline void nfs3_forget_cached_acls(struct inode *inode)
499{
500}
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000501#endif /* CONFIG_NFS_V3_ACL */
502
503/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 * linux/fs/mount_clnt.c
505 * (Used only by nfsroot module)
506 */
507extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *,
508 int, int);
509
510/*
511 * inline functions
512 */
513
514static inline loff_t
515nfs_size_to_loff_t(__u64 size)
516{
517 loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1;
518 if (size > maxsz)
519 return maxsz;
520 return (loff_t) size;
521}
522
523static inline ino_t
524nfs_fileid_to_ino_t(u64 fileid)
525{
526 ino_t ino = (ino_t) fileid;
527 if (sizeof(ino_t) < sizeof(u64))
528 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
529 return ino;
530}
531
532/* NFS root */
533
534extern void * nfs_root_data(void);
535
536#define nfs_wait_event(clnt, wq, condition) \
537({ \
538 int __retval = 0; \
539 if (clnt->cl_intr) { \
540 sigset_t oldmask; \
541 rpc_clnt_sigmask(clnt, &oldmask); \
542 __retval = wait_event_interruptible(wq, condition); \
543 rpc_clnt_sigunmask(clnt, &oldmask); \
544 } else \
545 wait_event(wq, condition); \
546 __retval; \
547})
548
549#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
550
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551#endif /* __KERNEL__ */
552
553/*
554 * NFS debug flags
555 */
556#define NFSDBG_VFS 0x0001
557#define NFSDBG_DIRCACHE 0x0002
558#define NFSDBG_LOOKUPCACHE 0x0004
559#define NFSDBG_PAGECACHE 0x0008
560#define NFSDBG_PROC 0x0010
561#define NFSDBG_XDR 0x0020
562#define NFSDBG_FILE 0x0040
563#define NFSDBG_ROOT 0x0080
564#define NFSDBG_CALLBACK 0x0100
David Howells24c8dbb2006-08-22 20:06:10 -0400565#define NFSDBG_CLIENT 0x0200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566#define NFSDBG_ALL 0xFFFF
567
568#ifdef __KERNEL__
569# undef ifdebug
570# ifdef NFS_DEBUG
571# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
572# else
573# define ifdebug(fac) if (0)
574# endif
575#endif /* __KERNEL */
576
577#endif