projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
tracing: add sched_set_prio tracepoint
[deliverable/linux.git] / include / linux / nfs_fs.h
CommitLineData
1da177e4
LT		 1/*
2 * linux/include/linux/nfs_fs.h
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * OS-specific nfs filesystem definitions and declarations
7 */
1da177e4
LT		 8#ifndef _LINUX_NFS_FS_H
9#define _LINUX_NFS_FS_H
10
607ca46e 11#include <uapi/linux/nfs_fs.h>
03bf4b70 12
1da177e4 13
e27d359e
TM		 14/*
15 * Enable dprintk() debugging support for nfs client.
16 */
17#ifdef CONFIG_NFS_DEBUG
18# define NFS_DEBUG
19#endif
20
7f1cbe51
DW		 21#include <linux/in.h>
22#include <linux/mm.h>
23#include <linux/pagemap.h>
1c3c07e9 24#include <linux/rbtree.h>
7f1cbe51
DW		 25#include <linux/rwsem.h>
26#include <linux/wait.h>
27
28#include <linux/sunrpc/debug.h>
29#include <linux/sunrpc/auth.h>
30#include <linux/sunrpc/clnt.h>
31
32#include <linux/nfs.h>
33#include <linux/nfs2.h>
34#include <linux/nfs3.h>
35#include <linux/nfs4.h>
36#include <linux/nfs_xdr.h>
7f1cbe51
DW		 37#include <linux/nfs_fs_sb.h>
38
7f1cbe51
DW		 39#include <linux/mempool.h>
40
41/*
42 * These are the default flags for swap requests
43 */
44#define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
45
1da177e4
LT		 46/*
47 * NFSv3/v4 Access mode cache entry
48 */
49struct nfs_access_entry {
1c3c07e9 50 struct rb_node rb_node;
cfcea3e8 51 struct list_head lru;
1da177e4
LT		 52 unsigned long jiffies;
53 struct rpc_cred * cred;
54 int mask;
f682a398 55 struct rcu_head rcu_head;
1da177e4
LT		 56};
57
2a369153
TM		 58struct nfs_lockowner {
59 fl_owner_t l_owner;
60 pid_t l_pid;
61};
62
f11ac8db
TM		 63struct nfs_lock_context {
64 atomic_t count;
65 struct list_head list;
66 struct nfs_open_context *open_context;
2a369153 67 struct nfs_lockowner lockowner;
210c7c17 68 atomic_t io_count;
f11ac8db
TM		 69};
70
1da177e4
LT		 71struct nfs4_state;
72struct nfs_open_context {
f11ac8db 73 struct nfs_lock_context lock_context;
3d4ff43d 74 struct dentry *dentry;
1da177e4
LT		 75 struct rpc_cred *cred;
76 struct nfs4_state *state;
dc0b027d 77 fmode_t mode;
7b159fc1
TM		 78
79 unsigned long flags;
80#define NFS_CONTEXT_ERROR_WRITE (0)
05990d1b 81#define NFS_CONTEXT_RESEND_WRITES (1)
c58c8441 82#define NFS_CONTEXT_BAD (2)
1da177e4
LT		 83 int error;
84
85 struct list_head list;
82be417a 86 struct nfs4_threshold *mdsthreshold;
480c2006 87};
00a92642 88
480c2006 89struct nfs_open_dir_context {
311324ad 90 struct list_head list;
480c2006 91 struct rpc_cred *cred;
0c030806 92 unsigned long attr_gencount;
00a92642 93 __u64 dir_cookie;
8ef2ce3e 94 __u64 dup_cookie;
0c030806 95 signed char duped;
1da177e4
LT		 96};
97
98/*
99 * NFSv4 delegation
100 */
101struct nfs_delegation;
102
5c6a9f7d
AG		 103struct posix_acl;
104
1da177e4
LT		 105/*
106 * nfs fs inode data in memory
107 */
108struct nfs_inode {
109 /*
110 * The 64bit 'inode number'
111 */
112 __u64 fileid;
113
114 /*
115 * NFS file handle
116 */
117 struct nfs_fh fh;
118
119 /*
120 * Various flags
121 */
412d582e
CL		 122 unsigned long flags; /* atomic bit ops */
123 unsigned long cache_validity; /* bit mask */
1da177e4
LT		 124
125 /*
24bd68f4 126 * read_cache_jiffies is when we started read-caching this inode.
1da177e4
LT		 127 * attrtimeo is for how long the cached information is assumed
128 * to be valid. A successful attribute revalidation doubles
129 * attrtimeo (up to acregmax/acdirmax), a failure resets it to
130 * acregmin/acdirmin.
131 *
132 * We need to revalidate the cached attrs for this inode if
133 *
64672d55
PS		 134 * jiffies - read_cache_jiffies >= attrtimeo
135 *
136 * Please note the comparison is greater than or equal
137 * so that zero timeout values can be specified.
1da177e4 138 */
1da177e4
LT		 139 unsigned long read_cache_jiffies;
140 unsigned long attrtimeo;
141 unsigned long attrtimeo_timestamp;
1da177e4 142
4704f0e2 143 unsigned long attr_gencount;
1da177e4
LT		 144 /* "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;
1da177e4 149
1c3c07e9 150 struct rb_root access_cache;
cfcea3e8
TM		 151 struct list_head access_cache_entry_lru;
152 struct list_head access_cache_inode_lru;
1da177e4
LT		 153
154 /*
155 * This is the cookie verifier used for NFSv3 readdir
156 * operations
157 */
bc4785cd 158 __be32 cookieverf[2];
1da177e4 159
cb1410c7 160 unsigned long nrequests;
ea2cf228 161 struct nfs_mds_commit_info commit_info;
1da177e4
LT		 162
163 /* Open contexts for shared mmap writes */
164 struct list_head open_files;
165
565277f6
TM		 166 /* Number of in-flight sillydelete RPC calls */
167 atomic_t silly_count;
168 /* List of deferred sillydelete requests */
169 struct hlist_head silly_list;
170 wait_queue_head_t waitqueue;
171
89d77c8f 172#if IS_ENABLED(CONFIG_NFS_V4)
e50a1c2e 173 struct nfs4_cached_acl *nfs4_acl;
1da177e4
LT		 174 /* NFSv4 state */
175 struct list_head open_states;
5b22216e 176 struct nfs_delegation __rcu *delegation;
1da177e4 177 struct rw_semaphore rwsem;
e5e94017
BH		 178
179 /* pNFS layout information */
180 struct pnfs_layout_hdr *layout;
1da177e4 181#endif /* CONFIG_NFS_V4*/
2701d086
AA		 182 /* how many bytes have been written/read and how many bytes queued up */
183 __u64 write_io;
184 __u64 read_io;
ef79c097
DH		 185#ifdef CONFIG_NFS_FSCACHE
186 struct fscache_cookie *fscache;
187#endif
1da177e4
LT		 188 struct inode vfs_inode;
189};
190
191/*
55296809 192 * Cache validity bit flags
1da177e4 193 */
55296809
CL		 194#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 */
412c77ce 200#define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */
aa9c2669 201#define NFS_INO_INVALID_LABEL 0x0080 /* cached label is invalid */
55296809
CL		 202
203/*
412d582e 204 * Bit offsets in flags field
55296809 205 */
691beb13
TM		 206#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 */
d529ef83 209#define NFS_INO_INVALIDATING (3) /* inode is being invalidated */
72cb77f4 210#define NFS_INO_FLUSHING (4) /* inode is flushing out data */
ef79c097
DH		 211#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */
212#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
863a3c6c 213#define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */
92407e75 214#define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */
1bfe3b25 215#define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */
1da177e4 216
99fadcd7 217static inline struct nfs_inode *NFS_I(const struct inode *inode)
1da177e4
LT		 218{
219 return container_of(inode, struct nfs_inode, vfs_inode);
220}
99fadcd7
BH		 221
222static inline struct nfs_server *NFS_SB(const struct super_block *s)
223{
224 return (struct nfs_server *)(s->s_fs_info);
225}
226
227static inline struct nfs_fh *NFS_FH(const struct inode *inode)
228{
229 return &NFS_I(inode)->fh;
230}
231
232static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
233{
234 return NFS_SB(inode->i_sb);
235}
236
237static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
238{
239 return NFS_SERVER(inode)->client;
240}
241
242static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
243{
244 return NFS_SERVER(inode)->nfs_client->rpc_ops;
245}
246
99fadcd7
BH		 247static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
248{
249 struct nfs_server *nfss = NFS_SERVER(inode);
250 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
251}
252
253static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
254{
255 struct nfs_server *nfss = NFS_SERVER(inode);
256 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
257}
258
259static inline int NFS_STALE(const struct inode *inode)
260{
261 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
262}
263
f1fe29b4 264static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode)
ef79c097 265{
f1fe29b4
DH		 266#ifdef CONFIG_NFS_FSCACHE
267 return NFS_I(inode)->fscache;
268#else
269 return NULL;
270#endif
ef79c097
DH		 271}
272
99fadcd7
BH		 273static inline __u64 NFS_FILEID(const struct inode *inode)
274{
275 return NFS_I(inode)->fileid;
276}
277
278static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
279{
280 NFS_I(inode)->fileid = fileid;
281}
1da177e4 282
decf491f
TM		 283static inline void nfs_mark_for_revalidate(struct inode *inode)
284{
38478b24
TM		 285 struct nfs_inode *nfsi = NFS_I(inode);
286
decf491f 287 spin_lock(&inode->i_lock);
115c48d7
TM		 288 nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
289 NFS_INO_REVAL_PAGECACHE |
290 NFS_INO_INVALID_ACCESS |
291 NFS_INO_INVALID_ACL;
f3821110 292 if (S_ISDIR(inode->i_mode))
115c48d7 293 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
decf491f
TM		 294 spin_unlock(&inode->i_lock);
295}
296
1da177e4
LT		 297static inline int nfs_server_capable(struct inode *inode, int cap)
298{
299 return NFS_SERVER(inode)->caps & cap;
300}
301
d75340cc
TM		 302static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
303{
304 dentry->d_time = verf;
305}
306
1da177e4
LT		 307/**
308 * nfs_save_change_attribute - Returns the inode attribute change cookie
8edb0182 309 * @dir - pointer to parent directory inode
1da177e4
LT		 310 * The "change attribute" is updated every time we finish an operation
311 * that will result in a metadata change on the server.
312 */
8edb0182 313static inline unsigned long nfs_save_change_attribute(struct inode *dir)
1da177e4 314{
8edb0182 315 return NFS_I(dir)->cache_change_attribute;
1da177e4
LT		 316}
317
318/**
4b841736
TM		 319 * nfs_verify_change_attribute - Detects NFS remote directory changes
320 * @dir - pointer to parent directory inode
1da177e4 321 * @chattr - previously saved change attribute
4b841736
TM		 322 * 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.
1da177e4 325 */
4b841736 326static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
1da177e4 327{
4b841736 328 return chattr == NFS_I(dir)->cache_change_attribute;
1da177e4
LT		 329}
330
331/*
332 * linux/fs/nfs/inode.c
333 */
29884df0 334extern int nfs_sync_mapping(struct address_space *mapping);
cd9ae2b6 335extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
1da177e4 336extern void nfs_zap_caches(struct inode *);
c4812998 337extern void nfs_invalidate_atime(struct inode *);
1da177e4 338extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
1775fd3e 339 struct nfs_fattr *, struct nfs4_label *);
1da177e4 340extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
decf491f 341extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
70ca8852 342extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
a08a8cd3 343extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr);
1da177e4 344extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
6168f62c
WAA		 345extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
346extern void nfs_access_set_mask(struct nfs_access_entry *, u32);
10556cb2 347extern int nfs_permission(struct inode *, int);
1da177e4 348extern int nfs_open(struct inode *, struct file *);
1da177e4 349extern int nfs_attribute_timeout(struct inode *inode);
43f291cd 350extern int nfs_attribute_cache_expired(struct inode *inode);
1da177e4 351extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
912a108d 352extern int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode);
1da177e4 353extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
44b11874 354extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
0d0def49 355extern int nfs_revalidate_mapping_rcu(struct inode *inode);
874f9463 356extern int nfs_revalidate_mapping_protected(struct inode *inode, struct address_space *mapping);
1da177e4 357extern int nfs_setattr(struct dentry *, struct iattr *);
f044636d 358extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *);
aa9c2669
DQ		 359extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
360 struct nfs4_label *label);
1da177e4
LT		 361extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
362extern void put_nfs_open_context(struct nfs_open_context *ctx);
dc0b027d 363extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
5ede7b1c 364extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode);
c45ffdd2 365extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx);
cd9a1c0e 366extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
aff8d8dc 367extern void nfs_file_clear_open_context(struct file *flip);
f11ac8db
TM		 368extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
369extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
f43bf0be 370extern u64 nfs_compat_user_ino64(u64 fileid);
4704f0e2 371extern void nfs_fattr_init(struct nfs_fattr *fattr);
140e049c 372extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr);
56463e50 373extern unsigned long nfs_inc_attr_generation_counter(void);
1da177e4 374
2d36bfde
TM		 375extern struct nfs_fattr *nfs_alloc_fattr(void);
376
377static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
378{
379 kfree(fattr);
380}
381
382extern struct nfs_fh *nfs_alloc_fhandle(void);
383
384static inline void nfs_free_fhandle(const struct nfs_fh *fh)
385{
386 kfree(fh);
387}
388
e27d359e 389#ifdef NFS_DEBUG
d8e0539e
WAA		 390extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
391static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
392{
393 return _nfs_display_fhandle_hash(fh);
394}
20d27e92
CL		 395extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption);
396#define nfs_display_fhandle(fh, caption) \
397 do { \
398 if (unlikely(nfs_debug & NFSDBG_FACILITY)) \
399 _nfs_display_fhandle(fh, caption); \
400 } while (0)
401#else
d8e0539e
WAA		 402static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
403{
9304a812 404 return 0;
d8e0539e 405}
20d27e92
CL		 406static inline void nfs_display_fhandle(const struct nfs_fh *fh,
407 const char *caption)
408{
409}
410#endif
411
56463e50
CL		 412/*
413 * linux/fs/nfs/nfsroot.c
414 */
415extern int nfs_root_data(char **root_device, char **root_data); /*__init*/
1da177e4 416/* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
5a874db4 417extern __be32 root_nfs_parse_addr(char *name); /*__init*/
0e574af1 418
1da177e4
LT		 419/*
420 * linux/fs/nfs/file.c
421 */
4b6f5d20 422extern const struct file_operations nfs_file_operations;
89d77c8f 423#if IS_ENABLED(CONFIG_NFS_V4)
1788ea6e
JL		 424extern const struct file_operations nfs4_file_operations;
425#endif /* CONFIG_NFS_V4 */
f5e54d6e 426extern const struct address_space_operations nfs_file_aops;
11de3b11 427extern const struct address_space_operations nfs_dir_aops;
1da177e4 428
c03025d5
TM		 429static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
430{
431 return filp->private_data;
432}
433
1da177e4
LT		 434static inline struct rpc_cred *nfs_file_cred(struct file *file)
435{
504e5189
NB		 436 if (file != NULL) {
437 struct nfs_open_context *ctx =
438 nfs_file_open_context(file);
439 if (ctx)
440 return ctx->cred;
441 }
1da177e4
LT		 442 return NULL;
443}
444
445/*
446 * linux/fs/nfs/direct.c
447 */
22c6186e 448extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *, loff_t);
027445c3 449extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
619d30b4 450 struct iov_iter *iter,
e19a8a0a 451 loff_t pos);
027445c3 452extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
65a4a1ca 453 struct iov_iter *iter);
1da177e4
LT		 454
455/*
456 * linux/fs/nfs/dir.c
457 */
4b6f5d20 458extern const struct file_operations nfs_dir_operations;
f786aa90 459extern const struct dentry_operations nfs_dentry_operations;
1da177e4 460
bfc69a45 461extern void nfs_force_lookup_revalidate(struct inode *dir);
1775fd3e
DQ		 462extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh,
463 struct nfs_fattr *fattr, struct nfs4_label *label);
af22f94a
TM		 464extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
465extern void nfs_access_zap_cache(struct inode *inode);
1da177e4
LT		 466
467/*
468 * linux/fs/nfs/symlink.c
469 */
c5ef1c42 470extern const struct inode_operations nfs_symlink_inode_operations;
1da177e4 471
a72b4422
TM		 472/*
473 * linux/fs/nfs/sysctl.c
474 */
475#ifdef CONFIG_SYSCTL
476extern int nfs_register_sysctl(void);
477extern void nfs_unregister_sysctl(void);
478#else
7fd105e7 479#define nfs_register_sysctl() 0
a72b4422
TM		 480#define nfs_unregister_sysctl() do { } while(0)
481#endif
482
55a97593
TM		 483/*
484 * linux/fs/nfs/namespace.c
485 */
c5ef1c42
AV		 486extern const struct inode_operations nfs_mountpoint_inode_operations;
487extern const struct inode_operations nfs_referral_inode_operations;
51d8fa6a
TM		 488extern int nfs_mountpoint_expiry_timeout;
489extern void nfs_release_automount_timer(void);
55a97593 490
1da177e4
LT		 491/*
492 * linux/fs/nfs/unlink.c
493 */
e4eff1a6 494extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
ba6c0592 495extern void nfs_wait_on_sillyrename(struct dentry *dentry);
565277f6
TM		 496extern void nfs_block_sillyrename(struct dentry *dentry);
497extern void nfs_unblock_sillyrename(struct dentry *dentry);
1da177e4
LT		 498
499/*
500 * linux/fs/nfs/write.c
501 */
89a09141 502extern int nfs_congestion_kb;
1da177e4
LT		 503extern int nfs_writepage(struct page *page, struct writeback_control *wbc);
504extern int nfs_writepages(struct address_space *, struct writeback_control *);
505extern int nfs_flush_incompatible(struct file *file, struct page *page);
506extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
1da177e4
LT		 507
508/*
509 * Try to write back everything synchronously (but check the
510 * return value!)
511 */
9e1681c2 512extern int nfs_sync_inode(struct inode *inode);
1c75950b 513extern int nfs_wb_all(struct inode *inode);
d6c843b9 514extern int nfs_wb_single_page(struct inode *inode, struct page *page, bool launder);
1b3b4a1a 515extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
b608b283 516extern int nfs_commit_inode(struct inode *, int);
0b7c0153
FI		 517extern struct nfs_commit_data *nfs_commitdata_alloc(void);
518extern void nfs_commit_free(struct nfs_commit_data *data);
1da177e4 519
d6c843b9
PT		 520static inline int
521nfs_wb_launder_page(struct inode *inode, struct page *page)
522{
523 return nfs_wb_single_page(inode, page, true);
524}
525
526static inline int
527nfs_wb_page(struct inode *inode, struct page *page)
528{
529 return nfs_wb_single_page(inode, page, false);
530}
531
1da177e4
LT		 532static inline int
533nfs_have_writebacks(struct inode *inode)
534{
cb1410c7 535 return NFS_I(inode)->nrequests != 0;
1da177e4
LT		 536}
537
1da177e4
LT		 538/*
539 * linux/fs/nfs/read.c
540 */
541extern int nfs_readpage(struct file *, struct page *);
542extern int nfs_readpages(struct file *, struct address_space *,
543 struct list_head *, unsigned);
f42b293d
DH		 544extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
545 struct page *);
963d8fe5 546
1da177e4
LT		 547/*
548 * inline functions
549 */
550
433c9237 551static inline loff_t nfs_size_to_loff_t(__u64 size)
1da177e4 552{
50ab8ec7 553 return min_t(u64, size, OFFSET_MAX);
1da177e4
LT		 554}
555
556static inline ino_t
557nfs_fileid_to_ino_t(u64 fileid)
558{
559 ino_t ino = (ino_t) fileid;
560 if (sizeof(ino_t) < sizeof(u64))
561 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
562 return ino;
563}
564
1da177e4
LT		 565#define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
566
4dc2eaec 567
1da177e4
LT		 568# undef ifdebug
569# ifdef NFS_DEBUG
570# define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac))
6f00866d 571# define NFS_IFDEBUG(x) x
1da177e4
LT		 572# else
573# define ifdebug(fac) if (0)
6f00866d 574# define NFS_IFDEBUG(x)
1da177e4 575# endif
1da177e4 576#endif
Linux kernel - Deliverables
This page took 1.128641 seconds and 5 git commands to generate.