blob: d09db1bc90830af34e6985129b52109d8b5fa05f [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 */
36#define FLUSH_NOCOMMIT 32 /* Don't send the NFSv3/v4 COMMIT */
37#define FLUSH_INVALIDATE 64 /* Invalidate the page cache */
Trond Myklebust4d770cc2006-12-05 00:35:41 -050038#define FLUSH_NOWRITEPAGE 128 /* Don't call writepage() */
David Woodhouse7f1cbe52006-09-12 20:36:02 -070039
40#ifdef __KERNEL__
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/in.h>
43#include <linux/mm.h>
44#include <linux/pagemap.h>
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040045#include <linux/rbtree.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/rwsem.h>
47#include <linux/wait.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/sunrpc/debug.h>
50#include <linux/sunrpc/auth.h>
51#include <linux/sunrpc/clnt.h>
52
53#include <linux/nfs.h>
54#include <linux/nfs2.h>
55#include <linux/nfs3.h>
56#include <linux/nfs4.h>
57#include <linux/nfs_xdr.h>
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -040058#include <linux/nfs_fs_sb.h>
59
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 {
Trond Myklebust5e119342007-07-26 12:06:17 -040080 atomic_t count;
Trond Myklebust88be9f92007-06-05 10:42:27 -040081 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct rpc_cred *cred;
83 struct nfs4_state *state;
84 fl_owner_t lockowner;
Trond Myklebustdc0b0272008-12-23 15:21:56 -050085 fmode_t mode;
Trond Myklebust7b159fc2007-07-25 14:09:54 -040086
87 unsigned long flags;
88#define NFS_CONTEXT_ERROR_WRITE (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 int error;
90
91 struct list_head list;
Olivier Galibert00a92642005-06-22 17:16:29 +000092
Olivier Galibert00a92642005-06-22 17:16:29 +000093 __u64 dir_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094};
95
96/*
97 * NFSv4 delegation
98 */
99struct nfs_delegation;
100
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000101struct posix_acl;
102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103/*
104 * nfs fs inode data in memory
105 */
106struct nfs_inode {
107 /*
108 * The 64bit 'inode number'
109 */
110 __u64 fileid;
111
112 /*
113 * NFS file handle
114 */
115 struct nfs_fh fh;
116
117 /*
118 * Various flags
119 */
Chuck Lever412d5822005-08-18 11:24:11 -0700120 unsigned long flags; /* atomic bit ops */
121 unsigned long cache_validity; /* bit mask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123 /*
Goldwyn Rodrigues24bd68f2006-03-20 13:44:11 -0500124 * read_cache_jiffies is when we started read-caching this inode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 * attrtimeo is for how long the cached information is assumed
126 * to be valid. A successful attribute revalidation doubles
127 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
128 * acregmin/acdirmin.
129 *
130 * We need to revalidate the cached attrs for this inode if
131 *
Peter Staubach64672d52008-12-23 15:21:56 -0500132 * jiffies - read_cache_jiffies >= attrtimeo
133 *
134 * Please note the comparison is greater than or equal
135 * so that zero timeout values can be specified.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 unsigned long read_cache_jiffies;
138 unsigned long attrtimeo;
139 unsigned long attrtimeo_timestamp;
140 __u64 change_attr; /* v4 only */
141
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400142 unsigned long attr_gencount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 /* "Generation counter" for the attribute cache. This is
144 * bumped whenever we update the metadata on the
145 * server.
146 */
147 unsigned long cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 struct radix_tree_root nfs_page_tree;
167
Trond Myklebustfb8a1f12009-03-11 14:10:29 -0400168 unsigned long npages;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170 /* Open contexts for shared mmap writes */
171 struct list_head open_files;
172
Trond Myklebust565277f2007-10-15 18:17:53 -0400173 /* Number of in-flight sillydelete RPC calls */
174 atomic_t silly_count;
175 /* List of deferred sillydelete requests */
176 struct hlist_head silly_list;
177 wait_queue_head_t waitqueue;
178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179#ifdef CONFIG_NFS_V4
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +0000180 struct nfs4_cached_acl *nfs4_acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 /* NFSv4 state */
182 struct list_head open_states;
183 struct nfs_delegation *delegation;
Trond Myklebustbd7bf9d2008-12-23 15:21:53 -0500184 fmode_t delegation_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 struct rw_semaphore rwsem;
186#endif /* CONFIG_NFS_V4*/
David Howellsef79c092009-04-03 16:42:43 +0100187#ifdef CONFIG_NFS_FSCACHE
188 struct fscache_cookie *fscache;
189#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 struct inode vfs_inode;
191};
192
193/*
Chuck Lever55296802005-08-18 11:24:09 -0700194 * Cache validity bit flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 */
Chuck Lever55296802005-08-18 11:24:09 -0700196#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
197#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
198#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
199#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
200#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
201#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
Trond Myklebust412c77c2007-07-03 16:10:55 -0400202#define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */
Chuck Lever55296802005-08-18 11:24:09 -0700203
204/*
Chuck Lever412d5822005-08-18 11:24:11 -0700205 * Bit offsets in flags field
Chuck Lever55296802005-08-18 11:24:09 -0700206 */
Trond Myklebust691beb12008-10-05 14:48:22 -0400207#define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */
208#define NFS_INO_STALE (1) /* possible stale inode */
209#define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */
210#define NFS_INO_MOUNTPOINT (3) /* inode is remote mountpoint */
Trond Myklebust72cb77f2009-03-11 14:10:30 -0400211#define NFS_INO_FLUSHING (4) /* inode is flushing out data */
David Howellsef79c092009-04-03 16:42:43 +0100212#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */
213#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Benny Halevy99fadcd2008-01-23 08:59:08 +0200215static inline struct nfs_inode *NFS_I(const struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
217 return container_of(inode, struct nfs_inode, vfs_inode);
218}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Benny Halevy99fadcd2008-01-23 08:59:08 +0200220static inline struct nfs_server *NFS_SB(const struct super_block *s)
221{
222 return (struct nfs_server *)(s->s_fs_info);
223}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Benny Halevy99fadcd2008-01-23 08:59:08 +0200225static inline struct nfs_fh *NFS_FH(const struct inode *inode)
226{
227 return &NFS_I(inode)->fh;
228}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Benny Halevy99fadcd2008-01-23 08:59:08 +0200230static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
231{
232 return NFS_SB(inode->i_sb);
233}
234
235static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
236{
237 return NFS_SERVER(inode)->client;
238}
239
240static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
241{
242 return NFS_SERVER(inode)->nfs_client->rpc_ops;
243}
244
245static inline __be32 *NFS_COOKIEVERF(const struct inode *inode)
246{
247 return NFS_I(inode)->cookieverf;
248}
249
250static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
251{
252 struct nfs_server *nfss = NFS_SERVER(inode);
253 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
254}
255
256static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
257{
258 struct nfs_server *nfss = NFS_SERVER(inode);
259 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
260}
261
262static inline int NFS_STALE(const struct inode *inode)
263{
264 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
265}
266
David Howellsef79c092009-04-03 16:42:43 +0100267static inline int NFS_FSCACHE(const struct inode *inode)
268{
269 return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
270}
271
Benny Halevy99fadcd2008-01-23 08:59:08 +0200272static inline __u64 NFS_FILEID(const struct inode *inode)
273{
274 return NFS_I(inode)->fileid;
275}
276
277static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
278{
279 NFS_I(inode)->fileid = fileid;
280}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Trond Myklebustdecf4912005-10-27 22:12:39 -0400282static inline void nfs_mark_for_revalidate(struct inode *inode)
283{
Trond Myklebust38478b22006-05-25 01:40:57 -0400284 struct nfs_inode *nfsi = NFS_I(inode);
285
Trond Myklebustdecf4912005-10-27 22:12:39 -0400286 spin_lock(&inode->i_lock);
Trond Myklebust38478b22006-05-25 01:40:57 -0400287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
Trond Myklebustf3821112007-10-01 10:00:23 -0400288 if (S_ISDIR(inode->i_mode))
Trond Myklebust38478b22006-05-25 01:40:57 -0400289 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400290 spin_unlock(&inode->i_lock);
291}
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293static inline int nfs_server_capable(struct inode *inode, int cap)
294{
295 return NFS_SERVER(inode)->caps & cap;
296}
297
298static inline int NFS_USE_READDIRPLUS(struct inode *inode)
299{
Benny Halevy3a10c302008-01-23 08:58:59 +0200300 return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301}
302
Trond Myklebustd75340c2007-10-01 21:42:01 -0400303static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
304{
305 dentry->d_time = verf;
306}
307
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308/**
309 * nfs_save_change_attribute - Returns the inode attribute change cookie
Trond Myklebust8edb0182007-09-29 17:14:03 -0400310 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 * The "change attribute" is updated every time we finish an operation
312 * that will result in a metadata change on the server.
313 */
Trond Myklebust8edb0182007-09-29 17:14:03 -0400314static inline unsigned long nfs_save_change_attribute(struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315{
Trond Myklebust8edb0182007-09-29 17:14:03 -0400316 return NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317}
318
319/**
Trond Myklebust4b841732007-09-29 17:15:01 -0400320 * nfs_verify_change_attribute - Detects NFS remote directory changes
321 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 * @chattr - previously saved change attribute
Trond Myklebust4b841732007-09-29 17:15:01 -0400323 * Return "false" if the verifiers doesn't match the change attribute.
324 * This would usually indicate that the directory contents have changed on
325 * the server, and that any dentries need revalidating.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 */
Trond Myklebust4b841732007-09-29 17:15:01 -0400327static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328{
Trond Myklebust4b841732007-09-29 17:15:01 -0400329 return chattr == NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330}
331
332/*
333 * linux/fs/nfs/inode.c
334 */
Trond Myklebust29884df2005-12-13 16:13:54 -0500335extern int nfs_sync_mapping(struct address_space *mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700336extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337extern void nfs_zap_caches(struct inode *);
Trond Myklebustc4812992007-09-28 17:11:45 -0400338extern void nfs_invalidate_atime(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
340 struct nfs_fattr *);
341extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400342extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
Trond Myklebust70ca8852007-09-30 15:21:24 -0400343extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Al Viroe6305c42008-07-15 21:03:57 -0400345extern int nfs_permission(struct inode *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346extern int nfs_open(struct inode *, struct file *);
347extern int nfs_release(struct inode *, struct file *);
348extern int nfs_attribute_timeout(struct inode *inode);
349extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
350extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
Trond Myklebust44b11872006-05-25 01:40:59 -0400351extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800352extern int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353extern int nfs_setattr(struct dentry *, struct iattr *);
Trond Myklebust65e43082005-08-16 11:49:44 -0400354extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
356extern void put_nfs_open_context(struct nfs_open_context *ctx);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500357extern 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 -0400358extern u64 nfs_compat_user_ino64(u64 fileid);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400359extern void nfs_fattr_init(struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
Al Viro5a874db2006-11-08 00:19:38 -0800362extern __be32 root_nfs_parse_addr(char *name); /*__init*/
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400363extern unsigned long nfs_inc_attr_generation_counter(void);
Trond Myklebust0e574af2005-10-27 22:12:38 -0400364
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365/*
366 * linux/fs/nfs/file.c
367 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800368extern const struct inode_operations nfs_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000369#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800370extern const struct inode_operations nfs3_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000371#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800372extern const struct file_operations nfs_file_operations;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700373extern const struct address_space_operations nfs_file_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Trond Myklebustc03025d2007-08-10 17:44:28 -0400375static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
376{
377 return filp->private_data;
378}
379
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380static inline struct rpc_cred *nfs_file_cred(struct file *file)
381{
Neil Brown504e5182008-10-16 14:15:16 +1100382 if (file != NULL) {
383 struct nfs_open_context *ctx =
384 nfs_file_open_context(file);
385 if (ctx)
386 return ctx->cred;
387 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return NULL;
389}
390
391/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000392 * linux/fs/nfs/xattr.c
393 */
394#ifdef CONFIG_NFS_V3_ACL
395extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
396extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
397extern int nfs3_setxattr(struct dentry *, const char *,
398 const void *, size_t, int);
399extern int nfs3_removexattr (struct dentry *, const char *name);
400#else
401# define nfs3_listxattr NULL
402# define nfs3_getxattr NULL
403# define nfs3_setxattr NULL
404# define nfs3_removexattr NULL
405#endif
406
407/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 * linux/fs/nfs/direct.c
409 */
410extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
411 unsigned long);
Badari Pulavarty027445c2006-09-30 23:28:46 -0700412extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
413 const struct iovec *iov, unsigned long nr_segs,
414 loff_t pos);
415extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
416 const struct iovec *iov, unsigned long nr_segs,
417 loff_t pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418
419/*
420 * linux/fs/nfs/dir.c
421 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800422extern const struct inode_operations nfs_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000423#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800424extern const struct inode_operations nfs3_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000425#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800426extern const struct file_operations nfs_dir_operations;
Al Virof786aa92009-02-20 05:51:22 +0000427extern const struct dentry_operations nfs_dentry_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
Trond Myklebustbfc69a42007-10-15 18:18:29 -0400429extern void nfs_force_lookup_revalidate(struct inode *dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
Trond Myklebustaf22f942007-08-10 17:45:10 -0400431extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
432extern void nfs_access_zap_cache(struct inode *inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
434/*
435 * linux/fs/nfs/symlink.c
436 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800437extern const struct inode_operations nfs_symlink_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439/*
Trond Myklebusta72b4422006-01-03 09:55:41 +0100440 * linux/fs/nfs/sysctl.c
441 */
442#ifdef CONFIG_SYSCTL
443extern int nfs_register_sysctl(void);
444extern void nfs_unregister_sysctl(void);
445#else
Stephen Rothwell7fd105e2006-02-20 18:28:08 -0800446#define nfs_register_sysctl() 0
Trond Myklebusta72b4422006-01-03 09:55:41 +0100447#define nfs_unregister_sysctl() do { } while(0)
448#endif
449
450/*
Trond Myklebust55a97592006-06-09 09:34:19 -0400451 * linux/fs/nfs/namespace.c
452 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800453extern const struct inode_operations nfs_mountpoint_inode_operations;
454extern const struct inode_operations nfs_referral_inode_operations;
Trond Myklebust51d8fa62006-06-09 09:34:20 -0400455extern int nfs_mountpoint_expiry_timeout;
456extern void nfs_release_automount_timer(void);
Trond Myklebust55a97592006-06-09 09:34:19 -0400457
458/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 * linux/fs/nfs/unlink.c
460 */
Trond Myklebuste4eff1a2007-07-14 15:39:58 -0400461extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry);
462extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
Trond Myklebust565277f2007-10-15 18:17:53 -0400463extern void nfs_block_sillyrename(struct dentry *dentry);
464extern void nfs_unblock_sillyrename(struct dentry *dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466/*
467 * linux/fs/nfs/write.c
468 */
Peter Zijlstra89a09142007-03-16 13:38:26 -0800469extern int nfs_congestion_kb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
471extern int nfs_writepages(struct address_space *, struct writeback_control *);
472extern int nfs_flush_incompatible(struct file *file, struct page *page);
473extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
Chuck Lever462d5b32006-03-20 13:44:32 -0500474extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
476/*
477 * Try to write back everything synchronously (but check the
478 * return value!)
479 */
Trond Myklebust1c759502006-10-09 16:18:38 -0400480extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int);
Trond Myklebust1c759502006-10-09 16:18:38 -0400481extern int nfs_wb_all(struct inode *inode);
Trond Myklebusted90ef52007-07-20 13:13:28 -0400482extern int nfs_wb_nocommit(struct inode *inode);
Trond Myklebust1c759502006-10-09 16:18:38 -0400483extern int nfs_wb_page(struct inode *inode, struct page* page);
Trond Myklebust1b3b4a12007-08-28 10:29:36 -0400484extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000486extern int nfs_commit_inode(struct inode *, int);
Trond Myklebustc9d8f892008-04-15 16:56:39 -0400487extern struct nfs_write_data *nfs_commitdata_alloc(void);
Trond Myklebust8aca67f2006-11-13 16:23:44 -0500488extern void nfs_commit_free(struct nfs_write_data *wdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489#else
490static inline int
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000491nfs_commit_inode(struct inode *inode, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492{
493 return 0;
494}
495#endif
496
497static inline int
498nfs_have_writebacks(struct inode *inode)
499{
500 return NFS_I(inode)->npages != 0;
501}
502
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400504 * Allocate nfs_write_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400506extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
Trond Myklebust1ae88b22009-08-12 09:12:30 -0400507extern void nfs_writedata_free(struct nfs_write_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509/*
510 * linux/fs/nfs/read.c
511 */
512extern int nfs_readpage(struct file *, struct page *);
513extern int nfs_readpages(struct file *, struct address_space *,
514 struct list_head *, unsigned);
Trond Myklebustec06c092006-03-20 13:44:27 -0500515extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
David Howellsf42b2932009-04-03 16:42:44 +0100516extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
517 struct page *);
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100518
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400520 * Allocate nfs_read_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400522extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
Trond Myklebust1ae88b22009-08-12 09:12:30 -0400523extern void nfs_readdata_free(struct nfs_read_data *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000526 * linux/fs/nfs3proc.c
527 */
528#ifdef CONFIG_NFS_V3_ACL
529extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
530extern int nfs3_proc_setacl(struct inode *inode, int type,
531 struct posix_acl *acl);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000532extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
533 mode_t mode);
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000534extern void nfs3_forget_cached_acls(struct inode *inode);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000535#else
536static inline int nfs3_proc_set_default_acl(struct inode *dir,
537 struct inode *inode,
538 mode_t mode)
539{
540 return 0;
541}
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000542
543static inline void nfs3_forget_cached_acls(struct inode *inode)
544{
545}
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000546#endif /* CONFIG_NFS_V3_ACL */
547
548/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 * inline functions
550 */
551
Chuck Lever433c9232007-07-01 12:12:14 -0400552static inline loff_t nfs_size_to_loff_t(__u64 size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553{
Chuck Lever433c9232007-07-01 12:12:14 -0400554 if (size > (__u64) OFFSET_MAX - 1)
555 return OFFSET_MAX - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 return (loff_t) size;
557}
558
559static inline ino_t
560nfs_fileid_to_ino_t(u64 fileid)
561{
562 ino_t ino = (ino_t) fileid;
563 if (sizeof(ino_t) < sizeof(u64))
564 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
565 return ino;
566}
567
568/* NFS root */
569
570extern void * nfs_root_data(void);
571
572#define nfs_wait_event(clnt, wq, condition) \
573({ \
Matthew Wilcox150030b2007-12-06 16:24:39 -0500574 int __retval = wait_event_killable(wq, condition); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 __retval; \
576})
577
578#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580#endif /* __KERNEL__ */
581
582/*
583 * NFS debug flags
584 */
585#define NFSDBG_VFS 0x0001
586#define NFSDBG_DIRCACHE 0x0002
587#define NFSDBG_LOOKUPCACHE 0x0004
588#define NFSDBG_PAGECACHE 0x0008
589#define NFSDBG_PROC 0x0010
590#define NFSDBG_XDR 0x0020
591#define NFSDBG_FILE 0x0040
592#define NFSDBG_ROOT 0x0080
593#define NFSDBG_CALLBACK 0x0100
David Howells24c8dbb2006-08-22 20:06:10 -0400594#define NFSDBG_CLIENT 0x0200
Chuck Leverf1828992007-07-01 12:12:51 -0400595#define NFSDBG_MOUNT 0x0400
David Howellsc6a6f192009-04-03 16:42:42 +0100596#define NFSDBG_FSCACHE 0x0800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597#define NFSDBG_ALL 0xFFFF
598
599#ifdef __KERNEL__
Benny Halevy4dc2eae2006-12-20 22:29:46 +0200600
601/*
602 * Enable debugging support for nfs client.
603 * Requires RPC_DEBUG.
604 */
605#ifdef RPC_DEBUG
606# define NFS_DEBUG
607#endif
608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609# undef ifdebug
610# ifdef NFS_DEBUG
611# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
612# else
613# define ifdebug(fac) if (0)
614# endif
615#endif /* __KERNEL */
616
617#endif