blob: 1b524b9f982a0965e25d18bebd2bddb9727a5625 [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
12#include <linux/config.h>
13#include <linux/in.h>
14#include <linux/mm.h>
15#include <linux/pagemap.h>
16#include <linux/rwsem.h>
17#include <linux/wait.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19#include <linux/nfs_fs_sb.h>
20
21#include <linux/sunrpc/debug.h>
22#include <linux/sunrpc/auth.h>
23#include <linux/sunrpc/clnt.h>
24
25#include <linux/nfs.h>
26#include <linux/nfs2.h>
27#include <linux/nfs3.h>
28#include <linux/nfs4.h>
29#include <linux/nfs_xdr.h>
30#include <linux/rwsem.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/mempool.h>
32
33/*
34 * Enable debugging support for nfs client.
35 * Requires RPC_DEBUG.
36 */
37#ifdef RPC_DEBUG
38# define NFS_DEBUG
39#endif
40
Chuck Lever03bf4b72005-08-25 16:25:55 -070041/* Default timeout values */
42#define NFS_MAX_UDP_TIMEOUT (60*HZ)
43#define NFS_MAX_TCP_TIMEOUT (600*HZ)
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * superblock magic number for NFS
47 */
48#define NFS_SUPER_MAGIC 0x6969
49
50/*
51 * These are the default flags for swap requests
52 */
53#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055/*
56 * When flushing a cluster of dirty pages, there can be different
57 * strategies:
58 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#define FLUSH_SYNC 1 /* file being synced, or contention */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#define FLUSH_STABLE 4 /* commit to stable storage */
61#define FLUSH_LOWPRI 8 /* low priority background flush */
62#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
Trond Myklebust70b9ecb2006-01-03 09:55:34 +010063#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65#ifdef __KERNEL__
66
67/*
68 * NFSv3/v4 Access mode cache entry
69 */
70struct nfs_access_entry {
71 unsigned long jiffies;
72 struct rpc_cred * cred;
73 int mask;
74};
75
76struct nfs4_state;
77struct nfs_open_context {
78 atomic_t count;
Trond Myklebustb92dccf2006-03-20 13:44:03 -050079 struct vfsmount *vfsmnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 struct dentry *dentry;
81 struct rpc_cred *cred;
82 struct nfs4_state *state;
83 fl_owner_t lockowner;
84 int mode;
85 int error;
86
87 struct list_head list;
Olivier Galibert00a92642005-06-22 17:16:29 +000088
Olivier Galibert00a92642005-06-22 17:16:29 +000089 __u64 dir_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090};
91
92/*
93 * NFSv4 delegation
94 */
95struct nfs_delegation;
96
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +000097struct posix_acl;
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099/*
100 * nfs fs inode data in memory
101 */
102struct nfs_inode {
103 /*
104 * The 64bit 'inode number'
105 */
106 __u64 fileid;
107
108 /*
109 * NFS file handle
110 */
111 struct nfs_fh fh;
112
113 /*
114 * Various flags
115 */
Chuck Lever412d5822005-08-18 11:24:11 -0700116 unsigned long flags; /* atomic bit ops */
117 unsigned long cache_validity; /* bit mask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
119 /*
Goldwyn Rodrigues24bd68f2006-03-20 13:44:11 -0500120 * read_cache_jiffies is when we started read-caching this inode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 * attrtimeo is for how long the cached information is assumed
122 * to be valid. A successful attribute revalidation doubles
123 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
124 * acregmin/acdirmin.
125 *
126 * We need to revalidate the cached attrs for this inode if
127 *
128 * jiffies - read_cache_jiffies > attrtimeo
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 unsigned long read_cache_jiffies;
131 unsigned long attrtimeo;
132 unsigned long attrtimeo_timestamp;
133 __u64 change_attr; /* v4 only */
134
Trond Myklebust33801142005-10-27 22:12:39 -0400135 unsigned long last_updated;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 /* "Generation counter" for the attribute cache. This is
137 * bumped whenever we update the metadata on the
138 * server.
139 */
140 unsigned long cache_change_attribute;
141 /*
142 * Counter indicating the number of outstanding requests that
143 * will cause a file data update.
144 */
145 atomic_t data_updates;
146
147 struct nfs_access_entry cache_access;
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000148#ifdef CONFIG_NFS_V3_ACL
149 struct posix_acl *acl_access;
150 struct posix_acl *acl_default;
151#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153 /*
154 * This is the cookie verifier used for NFSv3 readdir
155 * operations
156 */
157 __u32 cookieverf[2];
158
159 /*
160 * This is the list of dirty unwritten pages.
161 */
162 spinlock_t req_lock;
163 struct list_head dirty;
164 struct list_head commit;
165 struct radix_tree_root nfs_page_tree;
166
167 unsigned int ndirty,
168 ncommit,
169 npages;
170
171 /* Open contexts for shared mmap writes */
172 struct list_head open_files;
173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174#ifdef CONFIG_NFS_V4
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +0000175 struct nfs4_cached_acl *nfs4_acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 /* NFSv4 state */
177 struct list_head open_states;
178 struct nfs_delegation *delegation;
179 int delegation_state;
180 struct rw_semaphore rwsem;
181#endif /* CONFIG_NFS_V4*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 struct inode vfs_inode;
183};
184
185/*
Chuck Lever55296802005-08-18 11:24:09 -0700186 * Cache validity bit flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 */
Chuck Lever55296802005-08-18 11:24:09 -0700188#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
189#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
190#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
191#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
192#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
193#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
194
195/*
Chuck Lever412d5822005-08-18 11:24:11 -0700196 * Bit offsets in flags field
Chuck Lever55296802005-08-18 11:24:09 -0700197 */
Chuck Lever412d5822005-08-18 11:24:11 -0700198#define NFS_INO_REVALIDATING (0) /* revalidating attrs */
199#define NFS_INO_ADVISE_RDPLUS (1) /* advise readdirplus */
200#define NFS_INO_STALE (2) /* possible stale inode */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201
202static inline struct nfs_inode *NFS_I(struct inode *inode)
203{
204 return container_of(inode, struct nfs_inode, vfs_inode);
205}
206#define NFS_SB(s) ((struct nfs_server *)(s->s_fs_info))
207
208#define NFS_FH(inode) (&NFS_I(inode)->fh)
209#define NFS_SERVER(inode) (NFS_SB(inode->i_sb))
210#define NFS_CLIENT(inode) (NFS_SERVER(inode)->client)
211#define NFS_PROTO(inode) (NFS_SERVER(inode)->rpc_ops)
212#define NFS_ADDR(inode) (RPC_PEERADDR(NFS_CLIENT(inode)))
213#define NFS_COOKIEVERF(inode) (NFS_I(inode)->cookieverf)
214#define NFS_READTIME(inode) (NFS_I(inode)->read_cache_jiffies)
215#define NFS_CHANGE_ATTR(inode) (NFS_I(inode)->change_attr)
216#define NFS_ATTRTIMEO(inode) (NFS_I(inode)->attrtimeo)
217#define NFS_MINATTRTIMEO(inode) \
218 (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
219 : NFS_SERVER(inode)->acregmin)
220#define NFS_MAXATTRTIMEO(inode) \
221 (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
222 : NFS_SERVER(inode)->acregmax)
223#define NFS_ATTRTIMEO_UPDATE(inode) (NFS_I(inode)->attrtimeo_timestamp)
224
225#define NFS_FLAGS(inode) (NFS_I(inode)->flags)
Chuck Lever412d5822005-08-18 11:24:11 -0700226#define NFS_STALE(inode) (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228#define NFS_FILEID(inode) (NFS_I(inode)->fileid)
229
230static inline int nfs_caches_unstable(struct inode *inode)
231{
232 return atomic_read(&NFS_I(inode)->data_updates) != 0;
233}
234
Trond Myklebustdecf4912005-10-27 22:12:39 -0400235static inline void nfs_mark_for_revalidate(struct inode *inode)
236{
Trond Myklebust38478b22006-05-25 01:40:57 -0400237 struct nfs_inode *nfsi = NFS_I(inode);
238
Trond Myklebustdecf4912005-10-27 22:12:39 -0400239 spin_lock(&inode->i_lock);
Trond Myklebust38478b22006-05-25 01:40:57 -0400240 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
241 if (S_ISDIR(inode->i_mode))
242 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400243 spin_unlock(&inode->i_lock);
244}
245
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246static inline void NFS_CACHEINV(struct inode *inode)
247{
Trond Myklebustdecf4912005-10-27 22:12:39 -0400248 if (!nfs_caches_unstable(inode))
249 nfs_mark_for_revalidate(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250}
251
252static inline int nfs_server_capable(struct inode *inode, int cap)
253{
254 return NFS_SERVER(inode)->caps & cap;
255}
256
257static inline int NFS_USE_READDIRPLUS(struct inode *inode)
258{
Chuck Lever412d5822005-08-18 11:24:11 -0700259 return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
262/**
263 * nfs_save_change_attribute - Returns the inode attribute change cookie
264 * @inode - pointer to inode
265 * The "change attribute" is updated every time we finish an operation
266 * that will result in a metadata change on the server.
267 */
268static inline long nfs_save_change_attribute(struct inode *inode)
269{
270 return NFS_I(inode)->cache_change_attribute;
271}
272
273/**
274 * nfs_verify_change_attribute - Detects NFS inode cache updates
275 * @inode - pointer to inode
276 * @chattr - previously saved change attribute
277 * Return "false" if metadata has been updated (or is in the process of
278 * being updated) since the change attribute was saved.
279 */
280static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
281{
282 return !nfs_caches_unstable(inode)
Trond Myklebust913a70f2005-10-27 22:12:38 -0400283 && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284}
285
286/*
287 * linux/fs/nfs/inode.c
288 */
Trond Myklebust29884df2005-12-13 16:13:54 -0500289extern int nfs_sync_mapping(struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290extern void nfs_zap_caches(struct inode *);
291extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
292 struct nfs_fattr *);
293extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400294extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
296extern int nfs_permission(struct inode *, int, struct nameidata *);
297extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
298extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
299extern int nfs_open(struct inode *, struct file *);
300extern int nfs_release(struct inode *, struct file *);
301extern int nfs_attribute_timeout(struct inode *inode);
302extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
303extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
Trond Myklebust44b11872006-05-25 01:40:59 -0400304extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305extern int nfs_setattr(struct dentry *, struct iattr *);
Trond Myklebust65e43082005-08-16 11:49:44 -0400306extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307extern void nfs_begin_attr_update(struct inode *);
308extern void nfs_end_attr_update(struct inode *);
309extern void nfs_begin_data_update(struct inode *);
310extern void nfs_end_data_update(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
312extern void put_nfs_open_context(struct nfs_open_context *ctx);
Trond Myklebustd5308382005-11-04 15:33:38 -0500313extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
316extern u32 root_nfs_parse_addr(char *name); /*__init*/
317
Trond Myklebust0e574af2005-10-27 22:12:38 -0400318static inline void nfs_fattr_init(struct nfs_fattr *fattr)
319{
320 fattr->valid = 0;
Trond Myklebust33801142005-10-27 22:12:39 -0400321 fattr->time_start = jiffies;
Trond Myklebust0e574af2005-10-27 22:12:38 -0400322}
323
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324/*
325 * linux/fs/nfs/file.c
326 */
327extern struct inode_operations nfs_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000328#ifdef CONFIG_NFS_V3
329extern struct inode_operations nfs3_file_inode_operations;
330#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800331extern const struct file_operations nfs_file_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332extern struct address_space_operations nfs_file_aops;
333
334static inline struct rpc_cred *nfs_file_cred(struct file *file)
335{
336 if (file != NULL) {
337 struct nfs_open_context *ctx;
338
339 ctx = (struct nfs_open_context*)file->private_data;
340 return ctx->cred;
341 }
342 return NULL;
343}
344
345/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000346 * linux/fs/nfs/xattr.c
347 */
348#ifdef CONFIG_NFS_V3_ACL
349extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
350extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
351extern int nfs3_setxattr(struct dentry *, const char *,
352 const void *, size_t, int);
353extern int nfs3_removexattr (struct dentry *, const char *name);
354#else
355# define nfs3_listxattr NULL
356# define nfs3_getxattr NULL
357# define nfs3_setxattr NULL
358# define nfs3_removexattr NULL
359#endif
360
361/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 * linux/fs/nfs/direct.c
363 */
364extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
365 unsigned long);
366extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf,
367 size_t count, loff_t pos);
368extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf,
369 size_t count, loff_t pos);
370
371/*
372 * linux/fs/nfs/dir.c
373 */
374extern struct inode_operations nfs_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000375#ifdef CONFIG_NFS_V3
376extern struct inode_operations nfs3_dir_inode_operations;
377#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800378extern const struct file_operations nfs_dir_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379extern struct dentry_operations nfs_dentry_operations;
380
381extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
382
383/*
384 * linux/fs/nfs/symlink.c
385 */
386extern struct inode_operations nfs_symlink_inode_operations;
387
388/*
Trond Myklebusta72b4422006-01-03 09:55:41 +0100389 * linux/fs/nfs/sysctl.c
390 */
391#ifdef CONFIG_SYSCTL
392extern int nfs_register_sysctl(void);
393extern void nfs_unregister_sysctl(void);
394#else
Stephen Rothwell7fd105e2006-02-20 18:28:08 -0800395#define nfs_register_sysctl() 0
Trond Myklebusta72b4422006-01-03 09:55:41 +0100396#define nfs_unregister_sysctl() do { } while(0)
397#endif
398
399/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 * linux/fs/nfs/unlink.c
401 */
402extern int nfs_async_unlink(struct dentry *);
403extern void nfs_complete_unlink(struct dentry *);
404
405/*
406 * linux/fs/nfs/write.c
407 */
408extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
409extern int nfs_writepages(struct address_space *, struct writeback_control *);
410extern int nfs_flush_incompatible(struct file *file, struct page *page);
411extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
Chuck Lever462d5b32006-03-20 13:44:32 -0500412extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
413extern void nfs_writedata_release(void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
Trond Myklebuste17b1fc2006-03-20 13:44:35 -0500415#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
416struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount);
417void nfs_commit_free(struct nfs_write_data *p);
418#endif
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420/*
421 * Try to write back everything synchronously (but check the
422 * return value!)
423 */
Trond Myklebustc42de9d2006-03-20 13:44:51 -0500424extern int nfs_sync_inode_wait(struct inode *, unsigned long, unsigned int, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000426extern int nfs_commit_inode(struct inode *, int);
Trond Myklebustfad61492006-03-20 13:44:36 -0500427extern void nfs_commit_release(void *wdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428#else
429static inline int
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000430nfs_commit_inode(struct inode *inode, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431{
432 return 0;
433}
434#endif
435
436static inline int
437nfs_have_writebacks(struct inode *inode)
438{
439 return NFS_I(inode)->npages != 0;
440}
441
442static inline int
443nfs_wb_all(struct inode *inode)
444{
Trond Myklebustc42de9d2006-03-20 13:44:51 -0500445 int error = nfs_sync_inode_wait(inode, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 return (error < 0) ? error : 0;
447}
448
449/*
450 * Write back all requests on one page - we do this before reading it.
451 */
452static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how)
453{
Trond Myklebustc42de9d2006-03-20 13:44:51 -0500454 int error = nfs_sync_inode_wait(inode, page->index, 1,
455 how | FLUSH_STABLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 return (error < 0) ? error : 0;
457}
458
459static inline int nfs_wb_page(struct inode *inode, struct page* page)
460{
461 return nfs_wb_page_priority(inode, page, 0);
462}
463
464/*
465 * Allocate and free nfs_write_data structures
466 */
Trond Myklebust3feb2d42006-03-20 13:44:37 -0500467extern struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount);
468extern void nfs_writedata_free(struct nfs_write_data *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470/*
471 * linux/fs/nfs/read.c
472 */
473extern int nfs_readpage(struct file *, struct page *);
474extern int nfs_readpages(struct file *, struct address_space *,
475 struct list_head *, unsigned);
Trond Myklebustec06c092006-03-20 13:44:27 -0500476extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
477extern void nfs_readdata_release(void *data);
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100478
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479/*
480 * Allocate and free nfs_read_data structures
481 */
Trond Myklebust3feb2d42006-03-20 13:44:37 -0500482extern struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount);
483extern void nfs_readdata_free(struct nfs_read_data *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000486 * linux/fs/nfs3proc.c
487 */
488#ifdef CONFIG_NFS_V3_ACL
489extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
490extern int nfs3_proc_setacl(struct inode *inode, int type,
491 struct posix_acl *acl);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000492extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
493 mode_t mode);
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000494extern void nfs3_forget_cached_acls(struct inode *inode);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000495#else
496static inline int nfs3_proc_set_default_acl(struct inode *dir,
497 struct inode *inode,
498 mode_t mode)
499{
500 return 0;
501}
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000502
503static inline void nfs3_forget_cached_acls(struct inode *inode)
504{
505}
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000506#endif /* CONFIG_NFS_V3_ACL */
507
508/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 * linux/fs/mount_clnt.c
510 * (Used only by nfsroot module)
511 */
512extern int nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *,
513 int, int);
514
515/*
516 * inline functions
517 */
518
519static inline loff_t
520nfs_size_to_loff_t(__u64 size)
521{
522 loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1;
523 if (size > maxsz)
524 return maxsz;
525 return (loff_t) size;
526}
527
528static inline ino_t
529nfs_fileid_to_ino_t(u64 fileid)
530{
531 ino_t ino = (ino_t) fileid;
532 if (sizeof(ino_t) < sizeof(u64))
533 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
534 return ino;
535}
536
537/* NFS root */
538
539extern void * nfs_root_data(void);
540
541#define nfs_wait_event(clnt, wq, condition) \
542({ \
543 int __retval = 0; \
544 if (clnt->cl_intr) { \
545 sigset_t oldmask; \
546 rpc_clnt_sigmask(clnt, &oldmask); \
547 __retval = wait_event_interruptible(wq, condition); \
548 rpc_clnt_sigunmask(clnt, &oldmask); \
549 } else \
550 wait_event(wq, condition); \
551 __retval; \
552})
553
554#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
555
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556#endif /* __KERNEL__ */
557
558/*
559 * NFS debug flags
560 */
561#define NFSDBG_VFS 0x0001
562#define NFSDBG_DIRCACHE 0x0002
563#define NFSDBG_LOOKUPCACHE 0x0004
564#define NFSDBG_PAGECACHE 0x0008
565#define NFSDBG_PROC 0x0010
566#define NFSDBG_XDR 0x0020
567#define NFSDBG_FILE 0x0040
568#define NFSDBG_ROOT 0x0080
569#define NFSDBG_CALLBACK 0x0100
570#define NFSDBG_ALL 0xFFFF
571
572#ifdef __KERNEL__
573# undef ifdebug
574# ifdef NFS_DEBUG
575# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
576# else
577# define ifdebug(fac) if (0)
578# endif
579#endif /* __KERNEL */
580
581#endif