blob: db867b04ac3c21b66e39793149e121b4569ee41f [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>
Trond Myklebust3bec63d2007-06-17 16:02:44 -040043#include <linux/kref.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/mm.h>
45#include <linux/pagemap.h>
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040046#include <linux/rbtree.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/rwsem.h>
48#include <linux/wait.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#include <linux/sunrpc/debug.h>
51#include <linux/sunrpc/auth.h>
52#include <linux/sunrpc/clnt.h>
53
54#include <linux/nfs.h>
55#include <linux/nfs2.h>
56#include <linux/nfs3.h>
57#include <linux/nfs4.h>
58#include <linux/nfs_xdr.h>
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -040059#include <linux/nfs_fs_sb.h>
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/mempool.h>
62
63/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 * These are the default flags for swap requests
65 */
66#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 * NFSv3/v4 Access mode cache entry
70 */
71struct nfs_access_entry {
Trond Myklebust1c3c07e2006-07-25 11:28:18 -040072 struct rb_node rb_node;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -040073 struct list_head lru;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 unsigned long jiffies;
75 struct rpc_cred * cred;
76 int mask;
77};
78
79struct nfs4_state;
80struct nfs_open_context {
Trond Myklebust5e119342007-07-26 12:06:17 -040081 atomic_t count;
Trond Myklebust88be9f92007-06-05 10:42:27 -040082 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct rpc_cred *cred;
84 struct nfs4_state *state;
85 fl_owner_t lockowner;
Trond Myklebustdc0b0272008-12-23 15:21:56 -050086 fmode_t mode;
Trond Myklebust7b159fc2007-07-25 14:09:54 -040087
88 unsigned long flags;
89#define NFS_CONTEXT_ERROR_WRITE (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 int error;
91
92 struct list_head list;
Olivier Galibert00a92642005-06-22 17:16:29 +000093
Olivier Galibert00a92642005-06-22 17:16:29 +000094 __u64 dir_cookie;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095};
96
97/*
98 * NFSv4 delegation
99 */
100struct nfs_delegation;
101
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000102struct posix_acl;
103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104/*
105 * nfs fs inode data in memory
106 */
107struct nfs_inode {
108 /*
109 * The 64bit 'inode number'
110 */
111 __u64 fileid;
112
113 /*
114 * NFS file handle
115 */
116 struct nfs_fh fh;
117
118 /*
119 * Various flags
120 */
Chuck Lever412d5822005-08-18 11:24:11 -0700121 unsigned long flags; /* atomic bit ops */
122 unsigned long cache_validity; /* bit mask */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124 /*
Goldwyn Rodrigues24bd68f2006-03-20 13:44:11 -0500125 * read_cache_jiffies is when we started read-caching this inode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 * attrtimeo is for how long the cached information is assumed
127 * to be valid. A successful attribute revalidation doubles
128 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
129 * acregmin/acdirmin.
130 *
131 * We need to revalidate the cached attrs for this inode if
132 *
Peter Staubach64672d52008-12-23 15:21:56 -0500133 * jiffies - read_cache_jiffies >= attrtimeo
134 *
135 * Please note the comparison is greater than or equal
136 * so that zero timeout values can be specified.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 unsigned long read_cache_jiffies;
139 unsigned long attrtimeo;
140 unsigned long attrtimeo_timestamp;
141 __u64 change_attr; /* v4 only */
142
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400143 unsigned long attr_gencount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 /* "Generation counter" for the attribute cache. This is
145 * bumped whenever we update the metadata on the
146 * server.
147 */
148 unsigned long cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400150 struct rb_root access_cache;
Trond Myklebustcfcea3e2006-07-25 11:28:18 -0400151 struct list_head access_cache_entry_lru;
152 struct list_head access_cache_inode_lru;
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000153#ifdef CONFIG_NFS_V3_ACL
154 struct posix_acl *acl_access;
155 struct posix_acl *acl_default;
156#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158 /*
159 * This is the cookie verifier used for NFSv3 readdir
160 * operations
161 */
Al Virobc4785c2006-10-19 23:28:51 -0700162 __be32 cookieverf[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 /*
165 * This is the list of dirty unwritten pages.
166 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 struct radix_tree_root nfs_page_tree;
168
Trond Myklebustdce34ce2007-06-17 15:47:53 -0400169 unsigned long ncommit,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 npages;
171
172 /* Open contexts for shared mmap writes */
173 struct list_head open_files;
174
Trond Myklebust565277f2007-10-15 18:17:53 -0400175 /* Number of in-flight sillydelete RPC calls */
176 atomic_t silly_count;
177 /* List of deferred sillydelete requests */
178 struct hlist_head silly_list;
179 wait_queue_head_t waitqueue;
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181#ifdef CONFIG_NFS_V4
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +0000182 struct nfs4_cached_acl *nfs4_acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 /* NFSv4 state */
184 struct list_head open_states;
185 struct nfs_delegation *delegation;
Trond Myklebustbd7bf9d2008-12-23 15:21:53 -0500186 fmode_t delegation_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 struct rw_semaphore rwsem;
188#endif /* CONFIG_NFS_V4*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 struct inode vfs_inode;
190};
191
192/*
Chuck Lever55296802005-08-18 11:24:09 -0700193 * Cache validity bit flags
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 */
Chuck Lever55296802005-08-18 11:24:09 -0700195#define NFS_INO_INVALID_ATTR 0x0001 /* cached attrs are invalid */
196#define NFS_INO_INVALID_DATA 0x0002 /* cached data is invalid */
197#define NFS_INO_INVALID_ATIME 0x0004 /* cached atime is invalid */
198#define NFS_INO_INVALID_ACCESS 0x0008 /* cached access cred invalid */
199#define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */
200#define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */
Trond Myklebust412c77c2007-07-03 16:10:55 -0400201#define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */
Chuck Lever55296802005-08-18 11:24:09 -0700202
203/*
Chuck Lever412d5822005-08-18 11:24:11 -0700204 * Bit offsets in flags field
Chuck Lever55296802005-08-18 11:24:09 -0700205 */
Trond Myklebust691beb12008-10-05 14:48:22 -0400206#define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */
207#define NFS_INO_STALE (1) /* possible stale inode */
208#define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */
209#define NFS_INO_MOUNTPOINT (3) /* inode is remote mountpoint */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
Benny Halevy99fadcd2008-01-23 08:59:08 +0200211static inline struct nfs_inode *NFS_I(const struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
213 return container_of(inode, struct nfs_inode, vfs_inode);
214}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Benny Halevy99fadcd2008-01-23 08:59:08 +0200216static inline struct nfs_server *NFS_SB(const struct super_block *s)
217{
218 return (struct nfs_server *)(s->s_fs_info);
219}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Benny Halevy99fadcd2008-01-23 08:59:08 +0200221static inline struct nfs_fh *NFS_FH(const struct inode *inode)
222{
223 return &NFS_I(inode)->fh;
224}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Benny Halevy99fadcd2008-01-23 08:59:08 +0200226static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
227{
228 return NFS_SB(inode->i_sb);
229}
230
231static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
232{
233 return NFS_SERVER(inode)->client;
234}
235
236static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
237{
238 return NFS_SERVER(inode)->nfs_client->rpc_ops;
239}
240
241static inline __be32 *NFS_COOKIEVERF(const struct inode *inode)
242{
243 return NFS_I(inode)->cookieverf;
244}
245
246static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
247{
248 struct nfs_server *nfss = NFS_SERVER(inode);
249 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
250}
251
252static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
253{
254 struct nfs_server *nfss = NFS_SERVER(inode);
255 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
256}
257
258static inline int NFS_STALE(const struct inode *inode)
259{
260 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
261}
262
263static inline __u64 NFS_FILEID(const struct inode *inode)
264{
265 return NFS_I(inode)->fileid;
266}
267
268static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
269{
270 NFS_I(inode)->fileid = fileid;
271}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Trond Myklebustdecf4912005-10-27 22:12:39 -0400273static inline void nfs_mark_for_revalidate(struct inode *inode)
274{
Trond Myklebust38478b22006-05-25 01:40:57 -0400275 struct nfs_inode *nfsi = NFS_I(inode);
276
Trond Myklebustdecf4912005-10-27 22:12:39 -0400277 spin_lock(&inode->i_lock);
Trond Myklebust38478b22006-05-25 01:40:57 -0400278 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
Trond Myklebustf3821112007-10-01 10:00:23 -0400279 if (S_ISDIR(inode->i_mode))
Trond Myklebust38478b22006-05-25 01:40:57 -0400280 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
Trond Myklebustdecf4912005-10-27 22:12:39 -0400281 spin_unlock(&inode->i_lock);
282}
283
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284static inline int nfs_server_capable(struct inode *inode, int cap)
285{
286 return NFS_SERVER(inode)->caps & cap;
287}
288
289static inline int NFS_USE_READDIRPLUS(struct inode *inode)
290{
Benny Halevy3a10c302008-01-23 08:58:59 +0200291 return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292}
293
Trond Myklebustd75340c2007-10-01 21:42:01 -0400294static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
295{
296 dentry->d_time = verf;
297}
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299/**
300 * nfs_save_change_attribute - Returns the inode attribute change cookie
Trond Myklebust8edb0182007-09-29 17:14:03 -0400301 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 * The "change attribute" is updated every time we finish an operation
303 * that will result in a metadata change on the server.
304 */
Trond Myklebust8edb0182007-09-29 17:14:03 -0400305static inline unsigned long nfs_save_change_attribute(struct inode *dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306{
Trond Myklebust8edb0182007-09-29 17:14:03 -0400307 return NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308}
309
310/**
Trond Myklebust4b841732007-09-29 17:15:01 -0400311 * nfs_verify_change_attribute - Detects NFS remote directory changes
312 * @dir - pointer to parent directory inode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 * @chattr - previously saved change attribute
Trond Myklebust4b841732007-09-29 17:15:01 -0400314 * Return "false" if the verifiers doesn't match the change attribute.
315 * This would usually indicate that the directory contents have changed on
316 * the server, and that any dentries need revalidating.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 */
Trond Myklebust4b841732007-09-29 17:15:01 -0400318static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319{
Trond Myklebust4b841732007-09-29 17:15:01 -0400320 return chattr == NFS_I(dir)->cache_change_attribute;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321}
322
323/*
324 * linux/fs/nfs/inode.c
325 */
Trond Myklebust29884df2005-12-13 16:13:54 -0500326extern int nfs_sync_mapping(struct address_space *mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700327extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328extern void nfs_zap_caches(struct inode *);
Trond Myklebustc4812992007-09-28 17:11:45 -0400329extern void nfs_invalidate_atime(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
331 struct nfs_fattr *);
332extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
Trond Myklebustdecf4912005-10-27 22:12:39 -0400333extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
Trond Myklebust70ca8852007-09-30 15:21:24 -0400334extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
Al Viroe6305c42008-07-15 21:03:57 -0400336extern int nfs_permission(struct inode *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337extern int nfs_open(struct inode *, struct file *);
338extern int nfs_release(struct inode *, struct file *);
339extern int nfs_attribute_timeout(struct inode *inode);
340extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
341extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
Trond Myklebust44b11872006-05-25 01:40:59 -0400342extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800343extern int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344extern int nfs_setattr(struct dentry *, struct iattr *);
Trond Myklebust65e43082005-08-16 11:49:44 -0400345extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
347extern void put_nfs_open_context(struct nfs_open_context *ctx);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500348extern 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 -0400349extern u64 nfs_compat_user_ino64(u64 fileid);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400350extern void nfs_fattr_init(struct nfs_fattr *fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
Al Viro5a874db2006-11-08 00:19:38 -0800353extern __be32 root_nfs_parse_addr(char *name); /*__init*/
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400354extern unsigned long nfs_inc_attr_generation_counter(void);
Trond Myklebust0e574af2005-10-27 22:12:38 -0400355
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356/*
357 * linux/fs/nfs/file.c
358 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800359extern const struct inode_operations nfs_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000360#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800361extern const struct inode_operations nfs3_file_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000362#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800363extern const struct file_operations nfs_file_operations;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700364extern const struct address_space_operations nfs_file_aops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Trond Myklebustc03025d2007-08-10 17:44:28 -0400366static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
367{
368 return filp->private_data;
369}
370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371static inline struct rpc_cred *nfs_file_cred(struct file *file)
372{
Neil Brown504e5182008-10-16 14:15:16 +1100373 if (file != NULL) {
374 struct nfs_open_context *ctx =
375 nfs_file_open_context(file);
376 if (ctx)
377 return ctx->cred;
378 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 return NULL;
380}
381
382/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000383 * linux/fs/nfs/xattr.c
384 */
385#ifdef CONFIG_NFS_V3_ACL
386extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
387extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
388extern int nfs3_setxattr(struct dentry *, const char *,
389 const void *, size_t, int);
390extern int nfs3_removexattr (struct dentry *, const char *name);
391#else
392# define nfs3_listxattr NULL
393# define nfs3_getxattr NULL
394# define nfs3_setxattr NULL
395# define nfs3_removexattr NULL
396#endif
397
398/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 * linux/fs/nfs/direct.c
400 */
401extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
402 unsigned long);
Badari Pulavarty027445c2006-09-30 23:28:46 -0700403extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
404 const struct iovec *iov, unsigned long nr_segs,
405 loff_t pos);
406extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
407 const struct iovec *iov, unsigned long nr_segs,
408 loff_t pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410/*
411 * linux/fs/nfs/dir.c
412 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800413extern const struct inode_operations nfs_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000414#ifdef CONFIG_NFS_V3
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800415extern const struct inode_operations nfs3_dir_inode_operations;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000416#endif /* CONFIG_NFS_V3 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800417extern const struct file_operations nfs_dir_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418extern struct dentry_operations nfs_dentry_operations;
419
Trond Myklebustbfc69a42007-10-15 18:18:29 -0400420extern void nfs_force_lookup_revalidate(struct inode *dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
Trond Myklebustaf22f942007-08-10 17:45:10 -0400422extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
423extern void nfs_access_zap_cache(struct inode *inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
425/*
426 * linux/fs/nfs/symlink.c
427 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800428extern const struct inode_operations nfs_symlink_inode_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430/*
Trond Myklebusta72b4422006-01-03 09:55:41 +0100431 * linux/fs/nfs/sysctl.c
432 */
433#ifdef CONFIG_SYSCTL
434extern int nfs_register_sysctl(void);
435extern void nfs_unregister_sysctl(void);
436#else
Stephen Rothwell7fd105e2006-02-20 18:28:08 -0800437#define nfs_register_sysctl() 0
Trond Myklebusta72b4422006-01-03 09:55:41 +0100438#define nfs_unregister_sysctl() do { } while(0)
439#endif
440
441/*
Trond Myklebust55a97592006-06-09 09:34:19 -0400442 * linux/fs/nfs/namespace.c
443 */
Arjan van de Venc5ef1c42007-02-12 00:55:40 -0800444extern const struct inode_operations nfs_mountpoint_inode_operations;
445extern const struct inode_operations nfs_referral_inode_operations;
Trond Myklebust51d8fa62006-06-09 09:34:20 -0400446extern int nfs_mountpoint_expiry_timeout;
447extern void nfs_release_automount_timer(void);
Trond Myklebust55a97592006-06-09 09:34:19 -0400448
449/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 * linux/fs/nfs/unlink.c
451 */
Trond Myklebuste4eff1a2007-07-14 15:39:58 -0400452extern int nfs_async_unlink(struct inode *dir, struct dentry *dentry);
453extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
Trond Myklebust565277f2007-10-15 18:17:53 -0400454extern void nfs_block_sillyrename(struct dentry *dentry);
455extern void nfs_unblock_sillyrename(struct dentry *dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456
457/*
458 * linux/fs/nfs/write.c
459 */
Peter Zijlstra89a09142007-03-16 13:38:26 -0800460extern int nfs_congestion_kb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
462extern int nfs_writepages(struct address_space *, struct writeback_control *);
463extern int nfs_flush_incompatible(struct file *file, struct page *page);
464extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
Chuck Lever462d5b32006-03-20 13:44:32 -0500465extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
466extern void nfs_writedata_release(void *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
468/*
469 * Try to write back everything synchronously (but check the
470 * return value!)
471 */
Trond Myklebust1c759502006-10-09 16:18:38 -0400472extern long nfs_sync_mapping_wait(struct address_space *, struct writeback_control *, int);
Trond Myklebust1c759502006-10-09 16:18:38 -0400473extern int nfs_wb_all(struct inode *inode);
Trond Myklebusted90ef52007-07-20 13:13:28 -0400474extern int nfs_wb_nocommit(struct inode *inode);
Trond Myklebust1c759502006-10-09 16:18:38 -0400475extern int nfs_wb_page(struct inode *inode, struct page* page);
Trond Myklebust1b3b4a12007-08-28 10:29:36 -0400476extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000478extern int nfs_commit_inode(struct inode *, int);
Trond Myklebustc9d8f892008-04-15 16:56:39 -0400479extern struct nfs_write_data *nfs_commitdata_alloc(void);
Trond Myklebust8aca67f2006-11-13 16:23:44 -0500480extern void nfs_commit_free(struct nfs_write_data *wdata);
Trond Myklebustc9d8f892008-04-15 16:56:39 -0400481extern void nfs_commitdata_release(void *wdata);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482#else
483static inline int
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000484nfs_commit_inode(struct inode *inode, int how)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485{
486 return 0;
487}
488#endif
489
490static inline int
491nfs_have_writebacks(struct inode *inode)
492{
493 return NFS_I(inode)->npages != 0;
494}
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400497 * Allocate nfs_write_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400499extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501/*
502 * linux/fs/nfs/read.c
503 */
504extern int nfs_readpage(struct file *, struct page *);
505extern int nfs_readpages(struct file *, struct address_space *,
506 struct list_head *, unsigned);
Trond Myklebustec06c092006-03-20 13:44:27 -0500507extern int nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
508extern void nfs_readdata_release(void *data);
Trond Myklebust963d8fe2006-01-03 09:55:04 +0100509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510/*
Adrian Bunke4e20512006-08-03 15:07:47 -0400511 * Allocate nfs_read_data structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 */
Trond Myklebust8d5658c2007-04-10 09:26:35 -0400513extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515/*
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000516 * linux/fs/nfs3proc.c
517 */
518#ifdef CONFIG_NFS_V3_ACL
519extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
520extern int nfs3_proc_setacl(struct inode *inode, int type,
521 struct posix_acl *acl);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000522extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
523 mode_t mode);
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000524extern void nfs3_forget_cached_acls(struct inode *inode);
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000525#else
526static inline int nfs3_proc_set_default_acl(struct inode *dir,
527 struct inode *inode,
528 mode_t mode)
529{
530 return 0;
531}
Andreas Gruenbacher5c6a9f72005-06-22 17:16:27 +0000532
533static inline void nfs3_forget_cached_acls(struct inode *inode)
534{
535}
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000536#endif /* CONFIG_NFS_V3_ACL */
537
538/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 * inline functions
540 */
541
Chuck Lever433c9232007-07-01 12:12:14 -0400542static inline loff_t nfs_size_to_loff_t(__u64 size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543{
Chuck Lever433c9232007-07-01 12:12:14 -0400544 if (size > (__u64) OFFSET_MAX - 1)
545 return OFFSET_MAX - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 return (loff_t) size;
547}
548
549static inline ino_t
550nfs_fileid_to_ino_t(u64 fileid)
551{
552 ino_t ino = (ino_t) fileid;
553 if (sizeof(ino_t) < sizeof(u64))
554 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
555 return ino;
556}
557
558/* NFS root */
559
560extern void * nfs_root_data(void);
561
562#define nfs_wait_event(clnt, wq, condition) \
563({ \
Matthew Wilcox150030b2007-12-06 16:24:39 -0500564 int __retval = wait_event_killable(wq, condition); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 __retval; \
566})
567
568#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
569
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570#endif /* __KERNEL__ */
571
572/*
573 * NFS debug flags
574 */
575#define NFSDBG_VFS 0x0001
576#define NFSDBG_DIRCACHE 0x0002
577#define NFSDBG_LOOKUPCACHE 0x0004
578#define NFSDBG_PAGECACHE 0x0008
579#define NFSDBG_PROC 0x0010
580#define NFSDBG_XDR 0x0020
581#define NFSDBG_FILE 0x0040
582#define NFSDBG_ROOT 0x0080
583#define NFSDBG_CALLBACK 0x0100
David Howells24c8dbb2006-08-22 20:06:10 -0400584#define NFSDBG_CLIENT 0x0200
Chuck Leverf1828992007-07-01 12:12:51 -0400585#define NFSDBG_MOUNT 0x0400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586#define NFSDBG_ALL 0xFFFF
587
588#ifdef __KERNEL__
Benny Halevy4dc2eae2006-12-20 22:29:46 +0200589
590/*
591 * Enable debugging support for nfs client.
592 * Requires RPC_DEBUG.
593 */
594#ifdef RPC_DEBUG
595# define NFS_DEBUG
596#endif
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598# undef ifdebug
599# ifdef NFS_DEBUG
600# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
601# else
602# define ifdebug(fac) if (0)
603# endif
604#endif /* __KERNEL */
605
606#endif