blob: 77c2ae53431cccbdccf7932a84cd032e0b7e914c [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/* Default timeout values */
Trond Myklebust259875e2008-07-02 14:43:47 -040015#define NFS_DEF_UDP_TIMEO (11)
16#define NFS_DEF_UDP_RETRANS (3)
17#define NFS_DEF_TCP_TIMEO (600)
18#define NFS_DEF_TCP_RETRANS (2)
19
David Woodhouse7f1cbe52006-09-12 20:36:02 -070020#define NFS_MAX_UDP_TIMEOUT (60*HZ)
21#define NFS_MAX_TCP_TIMEOUT (600*HZ)
22
Chuck Lever0e0cab72008-06-26 17:47:12 -040023#define NFS_DEF_ACREGMIN (3)
24#define NFS_DEF_ACREGMAX (60)
25#define NFS_DEF_ACDIRMIN (30)
26#define NFS_DEF_ACDIRMAX (60)
27
David Woodhouse7f1cbe52006-09-12 20:36:02 -070028/*
David Woodhouse7f1cbe52006-09-12 20:36:02 -070029 * When flushing a cluster of dirty pages, there can be different
30 * strategies:
31 */
32#define FLUSH_SYNC 1 /* file being synced, or contention */
33#define FLUSH_STABLE 4 /* commit to stable storage */
34#define FLUSH_LOWPRI 8 /* low priority background flush */
35#define FLUSH_HIGHPRI 16 /* high priority memory reclaim flush */
David Woodhouse7f1cbe52006-09-12 20:36:02 -070036
37#ifdef __KERNEL__
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/in.h>
40#include <linux/mm.h>
41#include <linux/pagemap.h>
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040042#include <linux/rbtree.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <linux/rwsem.h>
44#include <linux/wait.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/sunrpc/debug.h>
47#include <linux/sunrpc/auth.h>
48#include <linux/sunrpc/clnt.h>
49
50#include <linux/nfs.h>
51#include <linux/nfs2.h>
52#include <linux/nfs3.h>
53#include <linux/nfs4.h>
54#include <linux/nfs_xdr.h>
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -040055#include <linux/nfs_fs_sb.h>
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#include <linux/mempool.h>
58
59/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 * These are the default flags for swap requests
61 */
62#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 * NFSv3/v4 Access mode cache entry
66 */
67struct nfs_access_entry {
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040068 struct rb_node rb_node;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -040069 struct list_head lru;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 unsigned long jiffies;
71 struct rpc_cred * cred;
72 int mask;
73};
74
75struct nfs4_state;
76struct nfs_open_context {
Trond Myklebust5e119342007-07-26 12:06:17 -040077 atomic_t count;
Trond Myklebust88be9f92007-06-05 10:42:27 -040078 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 struct rpc_cred *cred;
80 struct nfs4_state *state;
81 fl_owner_t lockowner;
Trond Myklebustdc0b0272008-12-23 15:21:56 -050082 fmode_t mode;
Trond Myklebust7b159fc2007-07-25 14:09:54 -040083
84 unsigned long flags;
85#define NFS_CONTEXT_ERROR_WRITE (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 int error;
87
88 struct list_head list;
Olivier Galibert00a92642005-06-22 17:16:29 +000089
Olivier Galibert00a92642005-06-22 17:16:29 +000090 __u64 dir_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091};
92
93/*
94 * NFSv4 delegation
95 */
96struct nfs_delegation;
97
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +000098struct posix_acl;
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100/*
101 * nfs fs inode data in memory
102 */
103struct nfs_inode {
104 /*
105 * The 64bit 'inode number'
106 */
107 __u64 fileid;
108
109 /*
110 * NFS file handle
111 */
112 struct nfs_fh fh;
113
114 /*
115 * Various flags
116 */
Chuck Lever412d5822005-08-18 11:24:11 -0700117 unsigned long flags; /* atomic bit ops */
118 unsigned long cache_validity; /* bit mask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
120 /*
Goldwyn Rodrigues24bd68f2006-03-20 13:44:11 -0500121 * read_cache_jiffies is when we started read-caching this inode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 * attrtimeo is for how long the cached information is assumed
123 * to be valid. A successful attribute revalidation doubles
124 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
125 * acregmin/acdirmin.
126 *
127 * We need to revalidate the cached attrs for this inode if
128 *
Peter Staubach64672d52008-12-23 15:21:56 -0500129 * jiffies - read_cache_jiffies >= attrtimeo
130 *
131 * Please note the comparison is greater than or equal
132 * so that zero timeout values can be specified.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 unsigned long read_cache_jiffies;
135 unsigned long attrtimeo;
136 unsigned long attrtimeo_timestamp;
137 __u64 change_attr; /* v4 only */
138
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400139 unsigned long attr_gencount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 /* "Generation counter" for the attribute cache. This is
141 * bumped whenever we update the metadata on the
142 * server.
143 */
144 unsigned long cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400146 struct rb_root access_cache;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -0400147 struct list_head access_cache_entry_lru;
148 struct list_head access_cache_inode_lru;
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000149#ifdef CONFIG_NFS_V3_ACL
150 struct posix_acl *acl_access;
151 struct posix_acl *acl_default;
152#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 /*
155 * This is the cookie verifier used for NFSv3 readdir
156 * operations
157 */
Al Virobc4785c2006-10-19 23:28:51 -0700158 __be32 cookieverf[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160 /*
161 * This is the list of dirty unwritten pages.
162 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 struct radix_tree_root nfs_page_tree;
164
Trond Myklebustfb8a1f12009-03-11 14:10:29 -0400165 unsigned long npages;
Trond Myklebustff778d02010-02-19 16:53:39 -0800166 unsigned long ncommit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168 /* Open contexts for shared mmap writes */
169 struct list_head open_files;
170
Trond Myklebust565277f2007-10-15 18:17:53 -0400171 /* Number of in-flight sillydelete RPC calls */
172 atomic_t silly_count;
173 /* List of deferred sillydelete requests */
174 struct hlist_head silly_list;
175 wait_queue_head_t waitqueue;
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177#ifdef CONFIG_NFS_V4
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +0000178 struct nfs4_cached_acl *nfs4_acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 /* NFSv4 state */
180 struct list_head open_states;
181 struct nfs_delegation *delegation;
Trond Myklebustbd7bf9d2008-12-23 15:21:53 -0500182 fmode_t delegation_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 struct rw_semaphore rwsem;
184#endif /* CONFIG_NFS_V4*/
David Howellsef79c092009-04-03 16:42:43 +0100185#ifdef CONFIG_NFS_FSCACHE
186 struct fscache_cookie *fscache;
187#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 struct inode vfs_inode;
189};
190
191/*
Chuck Lever55296802005-08-18 11:24:09 -0700192 * Cache validity bit flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 */
Chuck Lever55296802005-08-18 11:24:09 -0700194#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
195#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
196#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
197#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
198#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
199#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
Trond Myklebust412c77c2007-07-03 16:10:55 -0400200#define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */
Chuck Lever55296802005-08-18 11:24:09 -0700201
202/*
Chuck Lever412d5822005-08-18 11:24:11 -0700203 * Bit offsets in flags field
Chuck Lever55296802005-08-18 11:24:09 -0700204 */
Trond Myklebust691beb12008-10-05 14:48:22 -0400205#define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */
206#define NFS_INO_STALE (1) /* possible stale inode */
207#define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */
208#define NFS_INO_MOUNTPOINT (3) /* inode is remote mountpoint */
Trond Myklebust72cb77f2009-03-11 14:10:30 -0400209#define NFS_INO_FLUSHING (4) /* inode is flushing out data */
David Howellsef79c092009-04-03 16:42:43 +0100210#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */
211#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
Trond Myklebust71d0a612010-04-22 15:35:57 -0400212#define NFS_INO_COMMIT (7) /* inode is committing unstable writes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Benny Halevy99fadcd2008-01-23 08:59:08 +0200214static inline struct nfs_inode *NFS_I(const struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
216 return container_of(inode, struct nfs_inode, vfs_inode);
217}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Benny Halevy99fadcd2008-01-23 08:59:08 +0200219static inline struct nfs_server *NFS_SB(const struct super_block *s)
220{
221 return (struct nfs_server *)(s->s_fs_info);
222}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Benny Halevy99fadcd2008-01-23 08:59:08 +0200224static inline struct nfs_fh *NFS_FH(const struct inode *inode)
225{
226 return &NFS_I(inode)->fh;
227}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Benny Halevy99fadcd2008-01-23 08:59:08 +0200229static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
230{
231 return NFS_SB(inode->i_sb);
232}
233
234static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
235{
236 return NFS_SERVER(inode)->client;
237}
238
239static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
240{
241 return NFS_SERVER(inode)->nfs_client->rpc_ops;
242}
243
244static inline __be32 *NFS_COOKIEVERF(const struct inode *inode)
245{
246 return NFS_I(inode)->cookieverf;
247}
248
249static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
250{
251 struct nfs_server *nfss = NFS_SERVER(inode);
252 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
253}
254
255static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
256{
257 struct nfs_server *nfss = NFS_SERVER(inode);
258 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
259}
260
261static inline int NFS_STALE(const struct inode *inode)
262{
263 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
264}
265
David Howellsef79c092009-04-03 16:42:43 +0100266static inline int NFS_FSCACHE(const struct inode *inode)
267{
268 return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
269}
270
Benny Halevy99fadcd2008-01-23 08:59:08 +0200271static inline __u64 NFS_FILEID(const struct inode *inode)
272{
273 return NFS_I(inode)->fileid;
274}
275
276static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
277{
278 NFS_I(inode)->fileid = fileid;
279}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Trond Myklebustdecf4912005-10-27 22:12:39 -0400281static inline void nfs_mark_for_revalidate(struct inode *inode)
282{
Trond Myklebust38478b22006-05-25 01:40:57 -0400283 struct nfs_inode *nfsi = NFS_I(inode);
284
Trond Myklebustdecf4912005-10-27 22:12:39 -0400285 spin_lock(&inode->i_lock);
Trond Myklebust38478b22006-05-25 01:40:57 -0400286 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
Trond Myklebustf3821112007-10-01 10:00:23 -0400287 if (S_ISDIR(inode->i_mode))
Trond Myklebust38478b22006-05-25 01:40:57 -0400288 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400289 spin_unlock(&inode->i_lock);
290}
291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292static inline int nfs_server_capable(struct inode *inode, int cap)
293{
294 return NFS_SERVER(inode)->caps & cap;
295}
296
297static inline int NFS_USE_READDIRPLUS(struct inode *inode)
298{
Benny Halevy3a10c302008-01-23 08:58:59 +0200299 return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300}
301
Trond Myklebustd75340c2007-10-01 21:42:01 -0400302static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
303{
304 dentry->d_time = verf;
305}
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307/**
308 * nfs_save_change_attribute - Returns the inode attribute change cookie
Trond Myklebust8edb0182007-09-29 17:14:03 -0400309 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 * The "change attribute" is updated every time we finish an operation
311 * that will result in a metadata change on the server.
312 */
Trond Myklebust8edb0182007-09-29 17:14:03 -0400313static inline unsigned long nfs_save_change_attribute(struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
Trond Myklebust8edb0182007-09-29 17:14:03 -0400315 return NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316}
317
318/**
Trond Myklebust4b841732007-09-29 17:15:01 -0400319 * nfs_verify_change_attribute - Detects NFS remote directory changes
320 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 * @chattr - previously saved change attribute
Trond Myklebust4b841732007-09-29 17:15:01 -0400322 * Return "false" if the verifiers doesn't match the change attribute.
323 * This would usually indicate that the directory contents have changed on
324 * the server, and that any dentries need revalidating.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 */
Trond Myklebust4b841732007-09-29 17:15:01 -0400326static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327{
Trond Myklebust4b841732007-09-29 17:15:01 -0400328 return chattr == NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329}
330
331/*
332 * linux/fs/nfs/inode.c
333 */
Trond Myklebust29884df2005-12-13 16:13:54 -0500334extern int nfs_sync_mapping(struct address_space *mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700335extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336extern void nfs_zap_caches(struct inode *);
Trond Myklebustc4812992007-09-28 17:11:45 -0400337extern void nfs_invalidate_atime(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
339 struct nfs_fattr *);
340extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400341extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
Trond Myklebust70ca8852007-09-30 15:21:24 -0400342extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Al Viroe6305c42008-07-15 21:03:57 -0400344extern int nfs_permission(struct inode *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345extern int nfs_open(struct inode *, struct file *);
346extern int nfs_release(struct inode *, struct file *);
347extern int nfs_attribute_timeout(struct inode *inode);
348extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
349extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
Trond Myklebust44b11872006-05-25 01:40:59 -0400350extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351extern int nfs_setattr(struct dentry *, struct iattr *);
Trond Myklebust65e43082005-08-16 11:49:44 -0400352extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
354extern void put_nfs_open_context(struct nfs_open_context *ctx);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500355extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
Trond Myklebustf43bf0b2007-10-09 12:01:04 -0400356extern u64 nfs_compat_user_ino64(u64 fileid);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400357extern void nfs_fattr_init(struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Trond Myklebust2d36bfde2010-04-16 16:22:45 -0400359extern struct nfs_fattr *nfs_alloc_fattr(void);
360
361static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
362{
363 kfree(fattr);
364}
365
366extern struct nfs_fh *nfs_alloc_fhandle(void);
367
368static inline void nfs_free_fhandle(const struct nfs_fh *fh)
369{
370 kfree(fh);
371}
372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
Al Viro5a874db2006-11-08 00:19:38 -0800374extern __be32 root_nfs_parse_addr(char *name); /*__init*/
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400375extern unsigned long nfs_inc_attr_generation_counter(void);
Trond Myklebust0e574af2005-10-27 22:12:38 -0400376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377/*
378 * linux/fs/nfs/file.c
379 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800380extern const struct inode_operations nfs_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000381#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800382extern const struct inode_operations nfs3_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000383#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800384extern const struct file_operations nfs_file_operations;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700385extern const struct address_space_operations nfs_file_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
Trond Myklebustc03025d2007-08-10 17:44:28 -0400387static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
388{
389 return filp->private_data;
390}
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392static inline struct rpc_cred *nfs_file_cred(struct file *file)
393{
Neil Brown504e5182008-10-16 14:15:16 +1100394 if (file != NULL) {
395 struct nfs_open_context *ctx =
396 nfs_file_open_context(file);
397 if (ctx)
398 return ctx->cred;
399 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 return NULL;
401}
402
403/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000404 * linux/fs/nfs/xattr.c
405 */
406#ifdef CONFIG_NFS_V3_ACL
407extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
408extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
409extern int nfs3_setxattr(struct dentry *, const char *,
410 const void *, size_t, int);
411extern int nfs3_removexattr (struct dentry *, const char *name);
412#else
413# define nfs3_listxattr NULL
414# define nfs3_getxattr NULL
415# define nfs3_setxattr NULL
416# define nfs3_removexattr NULL
417#endif
418
419/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 * linux/fs/nfs/direct.c
421 */
422extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
423 unsigned long);
Badari Pulavarty027445c2006-09-30 23:28:46 -0700424extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
425 const struct iovec *iov, unsigned long nr_segs,
426 loff_t pos);
427extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
428 const struct iovec *iov, unsigned long nr_segs,
429 loff_t pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431/*
432 * linux/fs/nfs/dir.c
433 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800434extern const struct inode_operations nfs_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000435#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800436extern const struct inode_operations nfs3_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000437#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800438extern const struct file_operations nfs_dir_operations;
Al Virof786aa92009-02-20 05:51:22 +0000439extern const struct dentry_operations nfs_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Trond Myklebustbfc69a42007-10-15 18:18:29 -0400441extern void nfs_force_lookup_revalidate(struct inode *dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
Trond Myklebustaf22f942007-08-10 17:45:10 -0400443extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
444extern void nfs_access_zap_cache(struct inode *inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
446/*
447 * linux/fs/nfs/symlink.c
448 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800449extern const struct inode_operations nfs_symlink_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
451/*
Trond Myklebusta72b4422006-01-03 09:55:41 +0100452 * linux/fs/nfs/sysctl.c
453 */
454#ifdef CONFIG_SYSCTL
455extern int nfs_register_sysctl(void);
456extern void nfs_unregister_sysctl(void);
457#else
Stephen Rothwell7fd105e2006-02-20 18:28:08 -0800458#define nfs_register_sysctl() 0
Trond Myklebusta72b4422006-01-03 09:55:41 +0100459#define nfs_unregister_sysctl() do { } while(0)
460#endif
461
462/*
Trond Myklebust55a97592006-06-09 09:34:19 -0400463 * linux/fs/nfs/namespace.c
464 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800465extern const struct inode_operations nfs_mountpoint_inode_operations;
466extern const struct inode_operations nfs_referral_inode_operations;
Trond Myklebust51d8fa62006-06-09 09:34:20 -0400467extern int nfs_mountpoint_expiry_timeout;
468extern void nfs_release_automount_timer(void);
Trond Myklebust55a97592006-06-09 09:34:19 -0400469
470/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 * linux/fs/nfs/unlink.c
472 */
Trond Myklebuste4eff1a2007-07-14 15:39:58 -0400473extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry);
474extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
Trond Myklebust565277f2007-10-15 18:17:53 -0400475extern void nfs_block_sillyrename(struct dentry *dentry);
476extern void nfs_unblock_sillyrename(struct dentry *dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
478/*
479 * linux/fs/nfs/write.c
480 */
Peter Zijlstra89a09142007-03-16 13:38:26 -0800481extern int nfs_congestion_kb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
483extern int nfs_writepages(struct address_space *, struct writeback_control *);
484extern int nfs_flush_incompatible(struct file *file, struct page *page);
485extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
Chuck Lever462d5b32006-03-20 13:44:32 -0500486extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
488/*
489 * Try to write back everything synchronously (but check the
490 * return value!)
491 */
Trond Myklebust1c759502006-10-09 16:18:38 -0400492extern int nfs_wb_all(struct inode *inode);
493extern int nfs_wb_page(struct inode *inode, struct page* page);
Trond Myklebust1b3b4a12007-08-28 10:29:36 -0400494extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
Trond Myklebustc9d8f892008-04-15 16:56:39 -0400496extern struct nfs_write_data *nfs_commitdata_alloc(void);
Trond Myklebust8aca67f2006-11-13 16:23:44 -0500497extern void nfs_commit_free(struct nfs_write_data *wdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498#endif
499
500static inline int
501nfs_have_writebacks(struct inode *inode)
502{
503 return NFS_I(inode)->npages != 0;
504}
505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400507 * Allocate nfs_write_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400509extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
Trond Myklebust1ae88b22009-08-12 09:12:30 -0400510extern void nfs_writedata_free(struct nfs_write_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512/*
513 * linux/fs/nfs/read.c
514 */
515extern int nfs_readpage(struct file *, struct page *);
516extern int nfs_readpages(struct file *, struct address_space *,
517 struct list_head *, unsigned);
Trond Myklebustec06c092006-03-20 13:44:27 -0500518extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
David Howellsf42b2932009-04-03 16:42:44 +0100519extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
520 struct page *);
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400523 * Allocate nfs_read_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400525extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
Trond Myklebust1ae88b22009-08-12 09:12:30 -0400526extern void nfs_readdata_free(struct nfs_read_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000529 * linux/fs/nfs3proc.c
530 */
531#ifdef CONFIG_NFS_V3_ACL
532extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
533extern int nfs3_proc_setacl(struct inode *inode, int type,
534 struct posix_acl *acl);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000535extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
536 mode_t mode);
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000537extern void nfs3_forget_cached_acls(struct inode *inode);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000538#else
539static inline int nfs3_proc_set_default_acl(struct inode *dir,
540 struct inode *inode,
541 mode_t mode)
542{
543 return 0;
544}
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000545
546static inline void nfs3_forget_cached_acls(struct inode *inode)
547{
548}
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000549#endif /* CONFIG_NFS_V3_ACL */
550
551/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 * inline functions
553 */
554
Chuck Lever433c9232007-07-01 12:12:14 -0400555static inline loff_t nfs_size_to_loff_t(__u64 size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
Chuck Lever433c9232007-07-01 12:12:14 -0400557 if (size > (__u64) OFFSET_MAX - 1)
558 return OFFSET_MAX - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 return (loff_t) size;
560}
561
562static inline ino_t
563nfs_fileid_to_ino_t(u64 fileid)
564{
565 ino_t ino = (ino_t) fileid;
566 if (sizeof(ino_t) < sizeof(u64))
567 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
568 return ino;
569}
570
571/* NFS root */
572
573extern void * nfs_root_data(void);
574
575#define nfs_wait_event(clnt, wq, condition) \
576({ \
Matthew Wilcox150030b2007-12-06 16:24:39 -0500577 int __retval = wait_event_killable(wq, condition); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 __retval; \
579})
580
581#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583#endif /* __KERNEL__ */
584
585/*
586 * NFS debug flags
587 */
588#define NFSDBG_VFS 0x0001
589#define NFSDBG_DIRCACHE 0x0002
590#define NFSDBG_LOOKUPCACHE 0x0004
591#define NFSDBG_PAGECACHE 0x0008
592#define NFSDBG_PROC 0x0010
593#define NFSDBG_XDR 0x0020
594#define NFSDBG_FILE 0x0040
595#define NFSDBG_ROOT 0x0080
596#define NFSDBG_CALLBACK 0x0100
David Howells24c8dbb2006-08-22 20:06:10 -0400597#define NFSDBG_CLIENT 0x0200
Chuck Leverf1828992007-07-01 12:12:51 -0400598#define NFSDBG_MOUNT 0x0400
David Howellsc6a6f192009-04-03 16:42:42 +0100599#define NFSDBG_FSCACHE 0x0800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600#define NFSDBG_ALL 0xFFFF
601
602#ifdef __KERNEL__
Benny Halevy4dc2eae2006-12-20 22:29:46 +0200603
604/*
605 * Enable debugging support for nfs client.
606 * Requires RPC_DEBUG.
607 */
608#ifdef RPC_DEBUG
609# define NFS_DEBUG
610#endif
611
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612# undef ifdebug
613# ifdef NFS_DEBUG
614# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
615# else
616# define ifdebug(fac) if (0)
617# endif
618#endif /* __KERNEL */
619
620#endif