include/linux/nfs_fs.h

   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  */
   8
   9 #ifndef _LINUX_NFS_FS_H
  10 #define _LINUX_NFS_FS_H
  11
  12 #include <linux/magic.h>
  13
  14 /* Default timeout values */
  15 #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
  20 #define NFS_MAX_UDP_TIMEOUT     (60*HZ)
  21 #define NFS_MAX_TCP_TIMEOUT     (600*HZ)
  22
  23 #define NFS_DEF_ACREGMIN        (3)
  24 #define NFS_DEF_ACREGMAX        (60)
  25 #define NFS_DEF_ACDIRMIN        (30)
  26 #define NFS_DEF_ACDIRMAX        (60)
  27
  28 /*
  29  * 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_COND_STABLE       32      /* conditional stable write - only stable
  37                                          * if everything fits in one RPC */
  38
  39 #ifdef __KERNEL__
  40
  41 /*
  42  * Enable dprintk() debugging support for nfs client.
  43  */
  44 #ifdef CONFIG_NFS_DEBUG
  45 # define NFS_DEBUG
  46 #endif
  47
  48 #include <linux/in.h>
  49 #include <linux/mm.h>
  50 #include <linux/pagemap.h>
  51 #include <linux/rbtree.h>
  52 #include <linux/rwsem.h>
  53 #include <linux/wait.h>
  54
  55 #include <linux/sunrpc/debug.h>
  56 #include <linux/sunrpc/auth.h>
  57 #include <linux/sunrpc/clnt.h>
  58
  59 #include <linux/nfs.h>
  60 #include <linux/nfs2.h>
  61 #include <linux/nfs3.h>
  62 #include <linux/nfs4.h>
  63 #include <linux/nfs_xdr.h>
  64 #include <linux/nfs_fs_sb.h>
  65
  66 #include <linux/mempool.h>
  67
  68 /*
  69  * These are the default flags for swap requests
  70  */
  71 #define NFS_RPC_SWAPFLAGS               (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
  72
  73 /*
  74  * NFSv3/v4 Access mode cache entry
  75  */
  76 struct nfs_access_entry {
  77         struct rb_node          rb_node;
  78         struct list_head        lru;
  79         unsigned long           jiffies;
  80         struct rpc_cred *       cred;
  81         int                     mask;
  82 };
  83
  84 struct nfs_lock_context {
  85         atomic_t count;
  86         struct list_head list;
  87         struct nfs_open_context *open_context;
  88         fl_owner_t lockowner;
  89         pid_t pid;
  90 };
  91
  92 struct nfs4_state;
  93 struct nfs_open_context {
  94         struct nfs_lock_context lock_context;
  95         struct dentry *dentry;
  96         struct rpc_cred *cred;
  97         struct nfs4_state *state;
  98         fmode_t mode;
  99
 100         unsigned long flags;
 101 #define NFS_CONTEXT_ERROR_WRITE         (0)
 102         int error;
 103
 104         struct list_head list;
 105 };
 106
 107 struct nfs_open_dir_context {
 108         struct rpc_cred *cred;
 109         unsigned long attr_gencount;
 110         __u64 dir_cookie;
 111         __u64 dup_cookie;
 112         signed char duped;
 113 };
 114
 115 /*
 116  * NFSv4 delegation
 117  */
 118 struct nfs_delegation;
 119
 120 struct posix_acl;
 121
 122 /*
 123  * nfs fs inode data in memory
 124  */
 125 struct nfs_inode {
 126         /*
 127          * The 64bit 'inode number'
 128          */
 129         __u64 fileid;
 130
 131         /*
 132          * NFS file handle
 133          */
 134         struct nfs_fh           fh;
 135
 136         /*
 137          * Various flags
 138          */
 139         unsigned long           flags;                  /* atomic bit ops */
 140         unsigned long           cache_validity;         /* bit mask */
 141
 142         /*
 143          * read_cache_jiffies is when we started read-caching this inode.
 144          * attrtimeo is for how long the cached information is assumed
 145          * to be valid. A successful attribute revalidation doubles
 146          * attrtimeo (up to acregmax/acdirmax), a failure resets it to
 147          * acregmin/acdirmin.
 148          *
 149          * We need to revalidate the cached attrs for this inode if
 150          *
 151          *      jiffies - read_cache_jiffies >= attrtimeo
 152          *
 153          * Please note the comparison is greater than or equal
 154          * so that zero timeout values can be specified.
 155          */
 156         unsigned long           read_cache_jiffies;
 157         unsigned long           attrtimeo;
 158         unsigned long           attrtimeo_timestamp;
 159
 160         unsigned long           attr_gencount;
 161         /* "Generation counter" for the attribute cache. This is
 162          * bumped whenever we update the metadata on the
 163          * server.
 164          */
 165         unsigned long           cache_change_attribute;
 166
 167         struct rb_root          access_cache;
 168         struct list_head        access_cache_entry_lru;
 169         struct list_head        access_cache_inode_lru;
 170 #ifdef CONFIG_NFS_V3_ACL
 171         struct posix_acl        *acl_access;
 172         struct posix_acl        *acl_default;
 173 #endif
 174
 175         /*
 176          * This is the cookie verifier used for NFSv3 readdir
 177          * operations
 178          */
 179         __be32                  cookieverf[2];
 180
 181         unsigned long           npages;
 182         unsigned long           ncommit;
 183         struct list_head        commit_list;
 184
 185         /* Open contexts for shared mmap writes */
 186         struct list_head        open_files;
 187
 188         /* Number of in-flight sillydelete RPC calls */
 189         atomic_t                silly_count;
 190         /* List of deferred sillydelete requests */
 191         struct hlist_head       silly_list;
 192         wait_queue_head_t       waitqueue;
 193
 194 #ifdef CONFIG_NFS_V4
 195         struct nfs4_cached_acl  *nfs4_acl;
 196         /* NFSv4 state */
 197         struct list_head        open_states;
 198         struct nfs_delegation __rcu *delegation;
 199         fmode_t                  delegation_state;
 200         struct rw_semaphore     rwsem;
 201
 202         /* pNFS layout information */
 203         struct pnfs_layout_hdr *layout;
 204         atomic_t                commits_outstanding;
 205 #endif /* CONFIG_NFS_V4*/
 206 #ifdef CONFIG_NFS_FSCACHE
 207         struct fscache_cookie   *fscache;
 208 #endif
 209         struct inode            vfs_inode;
 210 };
 211
 212 /*
 213  * Cache validity bit flags
 214  */
 215 #define NFS_INO_INVALID_ATTR    0x0001          /* cached attrs are invalid */
 216 #define NFS_INO_INVALID_DATA    0x0002          /* cached data is invalid */
 217 #define NFS_INO_INVALID_ATIME   0x0004          /* cached atime is invalid */
 218 #define NFS_INO_INVALID_ACCESS  0x0008          /* cached access cred invalid */
 219 #define NFS_INO_INVALID_ACL     0x0010          /* cached acls are invalid */
 220 #define NFS_INO_REVAL_PAGECACHE 0x0020          /* must revalidate pagecache */
 221 #define NFS_INO_REVAL_FORCED    0x0040          /* force revalidation ignoring a delegation */
 222
 223 /*
 224  * Bit offsets in flags field
 225  */
 226 #define NFS_INO_ADVISE_RDPLUS   (0)             /* advise readdirplus */
 227 #define NFS_INO_STALE           (1)             /* possible stale inode */
 228 #define NFS_INO_ACL_LRU_SET     (2)             /* Inode is on the LRU list */
 229 #define NFS_INO_FLUSHING        (4)             /* inode is flushing out data */
 230 #define NFS_INO_FSCACHE         (5)             /* inode can be cached by FS-Cache */
 231 #define NFS_INO_FSCACHE_LOCK    (6)             /* FS-Cache cookie management lock */
 232 #define NFS_INO_COMMIT          (7)             /* inode is committing unstable writes */
 233 #define NFS_INO_PNFS_COMMIT     (8)             /* use pnfs code for commit */
 234 #define NFS_INO_LAYOUTCOMMIT    (9)             /* layoutcommit required */
 235 #define NFS_INO_LAYOUTCOMMITTING (10)           /* layoutcommit inflight */
 236
 237 static inline struct nfs_inode *NFS_I(const struct inode *inode)
 238 {
 239         return container_of(inode, struct nfs_inode, vfs_inode);
 240 }
 241
 242 static inline struct nfs_server *NFS_SB(const struct super_block *s)
 243 {
 244         return (struct nfs_server *)(s->s_fs_info);
 245 }
 246
 247 static inline struct nfs_fh *NFS_FH(const struct inode *inode)
 248 {
 249         return &NFS_I(inode)->fh;
 250 }
 251
 252 static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
 253 {
 254         return NFS_SB(inode->i_sb);
 255 }
 256
 257 static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
 258 {
 259         return NFS_SERVER(inode)->client;
 260 }
 261
 262 static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
 263 {
 264         return NFS_SERVER(inode)->nfs_client->rpc_ops;
 265 }
 266
 267 static inline __be32 *NFS_COOKIEVERF(const struct inode *inode)
 268 {
 269         return NFS_I(inode)->cookieverf;
 270 }
 271
 272 static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
 273 {
 274         struct nfs_server *nfss = NFS_SERVER(inode);
 275         return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
 276 }
 277
 278 static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
 279 {
 280         struct nfs_server *nfss = NFS_SERVER(inode);
 281         return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
 282 }
 283
 284 static inline int NFS_STALE(const struct inode *inode)
 285 {
 286         return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
 287 }
 288
 289 static inline int NFS_FSCACHE(const struct inode *inode)
 290 {
 291         return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
 292 }
 293
 294 static inline __u64 NFS_FILEID(const struct inode *inode)
 295 {
 296         return NFS_I(inode)->fileid;
 297 }
 298
 299 static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
 300 {
 301         NFS_I(inode)->fileid = fileid;
 302 }
 303
 304 static inline void nfs_mark_for_revalidate(struct inode *inode)
 305 {
 306         struct nfs_inode *nfsi = NFS_I(inode);
 307
 308         spin_lock(&inode->i_lock);
 309         nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
 310         if (S_ISDIR(inode->i_mode))
 311                 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
 312         spin_unlock(&inode->i_lock);
 313 }
 314
 315 static inline int nfs_server_capable(struct inode *inode, int cap)
 316 {
 317         return NFS_SERVER(inode)->caps & cap;
 318 }
 319
 320 static inline int NFS_USE_READDIRPLUS(struct inode *inode)
 321 {
 322         return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
 323 }
 324
 325 static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
 326 {
 327         dentry->d_time = verf;
 328 }
 329
 330 /**
 331  * nfs_save_change_attribute - Returns the inode attribute change cookie
 332  * @dir - pointer to parent directory inode
 333  * The "change attribute" is updated every time we finish an operation
 334  * that will result in a metadata change on the server.
 335  */
 336 static inline unsigned long nfs_save_change_attribute(struct inode *dir)
 337 {
 338         return NFS_I(dir)->cache_change_attribute;
 339 }
 340
 341 /**
 342  * nfs_verify_change_attribute - Detects NFS remote directory changes
 343  * @dir - pointer to parent directory inode
 344  * @chattr - previously saved change attribute
 345  * Return "false" if the verifiers doesn't match the change attribute.
 346  * This would usually indicate that the directory contents have changed on
 347  * the server, and that any dentries need revalidating.
 348  */
 349 static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
 350 {
 351         return chattr == NFS_I(dir)->cache_change_attribute;
 352 }
 353
 354 /*
 355  * linux/fs/nfs/inode.c
 356  */
 357 extern int nfs_sync_mapping(struct address_space *mapping);
 358 extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
 359 extern void nfs_zap_caches(struct inode *);
 360 extern void nfs_invalidate_atime(struct inode *);
 361 extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
 362                                 struct nfs_fattr *);
 363 extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
 364 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
 365 extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
 366 extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 367 extern int nfs_permission(struct inode *, int);
 368 extern int nfs_open(struct inode *, struct file *);
 369 extern int nfs_release(struct inode *, struct file *);
 370 extern int nfs_attribute_timeout(struct inode *inode);
 371 extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
 372 extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
 373 extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
 374 extern int nfs_setattr(struct dentry *, struct iattr *);
 375 extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
 376 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
 377 extern void put_nfs_open_context(struct nfs_open_context *ctx);
 378 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
 379 extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode);
 380 extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
 381 extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
 382 extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
 383 extern u64 nfs_compat_user_ino64(u64 fileid);
 384 extern void nfs_fattr_init(struct nfs_fattr *fattr);
 385 extern unsigned long nfs_inc_attr_generation_counter(void);
 386
 387 extern struct nfs_fattr *nfs_alloc_fattr(void);
 388
 389 static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
 390 {
 391         kfree(fattr);
 392 }
 393
 394 extern struct nfs_fh *nfs_alloc_fhandle(void);
 395
 396 static inline void nfs_free_fhandle(const struct nfs_fh *fh)
 397 {
 398         kfree(fh);
 399 }
 400
 401 #ifdef NFS_DEBUG
 402 extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
 403 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
 404 {
 405         return _nfs_display_fhandle_hash(fh);
 406 }
 407 extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption);
 408 #define nfs_display_fhandle(fh, caption)                        \
 409         do {                                                    \
 410                 if (unlikely(nfs_debug & NFSDBG_FACILITY))      \
 411                         _nfs_display_fhandle(fh, caption);      \
 412         } while (0)
 413 #else
 414 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
 415 {
 416 }
 417 static inline void nfs_display_fhandle(const struct nfs_fh *fh,
 418                                        const char *caption)
 419 {
 420 }
 421 #endif
 422
 423 /*
 424  * linux/fs/nfs/nfsroot.c
 425  */
 426 extern int  nfs_root_data(char **root_device, char **root_data); /*__init*/
 427 /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
 428 extern __be32 root_nfs_parse_addr(char *name); /*__init*/
 429
 430 /*
 431  * linux/fs/nfs/file.c
 432  */
 433 extern const struct inode_operations nfs_file_inode_operations;
 434 #ifdef CONFIG_NFS_V3
 435 extern const struct inode_operations nfs3_file_inode_operations;
 436 #endif /* CONFIG_NFS_V3 */
 437 extern const struct file_operations nfs_file_operations;
 438 #ifdef CONFIG_NFS_V4
 439 extern const struct file_operations nfs4_file_operations;
 440 #endif /* CONFIG_NFS_V4 */
 441 extern const struct address_space_operations nfs_file_aops;
 442 extern const struct address_space_operations nfs_dir_aops;
 443
 444 static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
 445 {
 446         return filp->private_data;
 447 }
 448
 449 static inline struct rpc_cred *nfs_file_cred(struct file *file)
 450 {
 451         if (file != NULL) {
 452                 struct nfs_open_context *ctx =
 453                         nfs_file_open_context(file);
 454                 if (ctx)
 455                         return ctx->cred;
 456         }
 457         return NULL;
 458 }
 459
 460 /*
 461  * linux/fs/nfs/xattr.c
 462  */
 463 #ifdef CONFIG_NFS_V3_ACL
 464 extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
 465 extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
 466 extern int nfs3_setxattr(struct dentry *, const char *,
 467                         const void *, size_t, int);
 468 extern int nfs3_removexattr (struct dentry *, const char *name);
 469 #else
 470 # define nfs3_listxattr NULL
 471 # define nfs3_getxattr NULL
 472 # define nfs3_setxattr NULL
 473 # define nfs3_removexattr NULL
 474 #endif
 475
 476 /*
 477  * linux/fs/nfs/direct.c
 478  */
 479 extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
 480                         unsigned long);
 481 extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
 482                         const struct iovec *iov, unsigned long nr_segs,
 483                         loff_t pos);
 484 extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
 485                         const struct iovec *iov, unsigned long nr_segs,
 486                         loff_t pos);
 487
 488 /*
 489  * linux/fs/nfs/dir.c
 490  */
 491 extern const struct inode_operations nfs_dir_inode_operations;
 492 #ifdef CONFIG_NFS_V3
 493 extern const struct inode_operations nfs3_dir_inode_operations;
 494 #endif /* CONFIG_NFS_V3 */
 495 extern const struct file_operations nfs_dir_operations;
 496 extern const struct dentry_operations nfs_dentry_operations;
 497
 498 extern void nfs_force_lookup_revalidate(struct inode *dir);
 499 extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
 500 extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
 501 extern void nfs_access_zap_cache(struct inode *inode);
 502
 503 /*
 504  * linux/fs/nfs/symlink.c
 505  */
 506 extern const struct inode_operations nfs_symlink_inode_operations;
 507
 508 /*
 509  * linux/fs/nfs/sysctl.c
 510  */
 511 #ifdef CONFIG_SYSCTL
 512 extern int nfs_register_sysctl(void);
 513 extern void nfs_unregister_sysctl(void);
 514 #else
 515 #define nfs_register_sysctl() 0
 516 #define nfs_unregister_sysctl() do { } while(0)
 517 #endif
 518
 519 /*
 520  * linux/fs/nfs/namespace.c
 521  */
 522 extern const struct inode_operations nfs_mountpoint_inode_operations;
 523 extern const struct inode_operations nfs_referral_inode_operations;
 524 extern int nfs_mountpoint_expiry_timeout;
 525 extern void nfs_release_automount_timer(void);
 526
 527 /*
 528  * linux/fs/nfs/unlink.c
 529  */
 530 extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
 531 extern void nfs_block_sillyrename(struct dentry *dentry);
 532 extern void nfs_unblock_sillyrename(struct dentry *dentry);
 533 extern int  nfs_sillyrename(struct inode *dir, struct dentry *dentry);
 534
 535 /*
 536  * linux/fs/nfs/write.c
 537  */
 538 extern int  nfs_congestion_kb;
 539 extern int  nfs_writepage(struct page *page, struct writeback_control *wbc);
 540 extern int  nfs_writepages(struct address_space *, struct writeback_control *);
 541 extern int  nfs_flush_incompatible(struct file *file, struct page *page);
 542 extern int  nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
 543 extern void nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
 544
 545 /*
 546  * Try to write back everything synchronously (but check the
 547  * return value!)
 548  */
 549 extern int nfs_wb_all(struct inode *inode);
 550 extern int nfs_wb_page(struct inode *inode, struct page* page);
 551 extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
 552 #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
 553 extern int  nfs_commit_inode(struct inode *, int);
 554 extern struct nfs_write_data *nfs_commitdata_alloc(void);
 555 extern void nfs_commit_free(struct nfs_write_data *wdata);
 556 #else
 557 static inline int
 558 nfs_commit_inode(struct inode *inode, int how)
 559 {
 560         return 0;
 561 }
 562 #endif
 563
 564 static inline int
 565 nfs_have_writebacks(struct inode *inode)
 566 {
 567         return NFS_I(inode)->npages != 0;
 568 }
 569
 570 /*
 571  * Allocate nfs_write_data structures
 572  */
 573 extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
 574 extern void nfs_writedata_free(struct nfs_write_data *);
 575
 576 /*
 577  * linux/fs/nfs/read.c
 578  */
 579 extern int  nfs_readpage(struct file *, struct page *);
 580 extern int  nfs_readpages(struct file *, struct address_space *,
 581                 struct list_head *, unsigned);
 582 extern int  nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
 583 extern int  nfs_readpage_async(struct nfs_open_context *, struct inode *,
 584                                struct page *);
 585
 586 /*
 587  * Allocate nfs_read_data structures
 588  */
 589 extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
 590 extern void nfs_readdata_free(struct nfs_read_data *);
 591
 592 /*
 593  * linux/fs/nfs3proc.c
 594  */
 595 #ifdef CONFIG_NFS_V3_ACL
 596 extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
 597 extern int nfs3_proc_setacl(struct inode *inode, int type,
 598                             struct posix_acl *acl);
 599 extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
 600                 umode_t mode);
 601 extern void nfs3_forget_cached_acls(struct inode *inode);
 602 #else
 603 static inline int nfs3_proc_set_default_acl(struct inode *dir,
 604                                             struct inode *inode,
 605                                             umode_t mode)
 606 {
 607         return 0;
 608 }
 609
 610 static inline void nfs3_forget_cached_acls(struct inode *inode)
 611 {
 612 }
 613 #endif /* CONFIG_NFS_V3_ACL */
 614
 615 /*
 616  * inline functions
 617  */
 618
 619 static inline loff_t nfs_size_to_loff_t(__u64 size)
 620 {
 621         if (size > (__u64) OFFSET_MAX - 1)
 622                 return OFFSET_MAX - 1;
 623         return (loff_t) size;
 624 }
 625
 626 static inline ino_t
 627 nfs_fileid_to_ino_t(u64 fileid)
 628 {
 629         ino_t ino = (ino_t) fileid;
 630         if (sizeof(ino_t) < sizeof(u64))
 631                 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
 632         return ino;
 633 }
 634
 635 #define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
 636
 637 #endif /* __KERNEL__ */
 638
 639 /*
 640  * NFS debug flags
 641  */
 642 #define NFSDBG_VFS              0x0001
 643 #define NFSDBG_DIRCACHE         0x0002
 644 #define NFSDBG_LOOKUPCACHE      0x0004
 645 #define NFSDBG_PAGECACHE        0x0008
 646 #define NFSDBG_PROC             0x0010
 647 #define NFSDBG_XDR              0x0020
 648 #define NFSDBG_FILE             0x0040
 649 #define NFSDBG_ROOT             0x0080
 650 #define NFSDBG_CALLBACK         0x0100
 651 #define NFSDBG_CLIENT           0x0200
 652 #define NFSDBG_MOUNT            0x0400
 653 #define NFSDBG_FSCACHE          0x0800
 654 #define NFSDBG_PNFS             0x1000
 655 #define NFSDBG_PNFS_LD          0x2000
 656 #define NFSDBG_ALL              0xFFFF
 657
 658 #ifdef __KERNEL__
 659
 660 # undef ifdebug
 661 # ifdef NFS_DEBUG
 662 #  define ifdebug(fac)          if (unlikely(nfs_debug & NFSDBG_##fac))
 663 # else
 664 #  define ifdebug(fac)          if (0)
 665 # endif
 666 #endif /* __KERNEL */
 667
 668 #endif