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_lockowner {
  85         fl_owner_t l_owner;
  86         pid_t l_pid;
  87 };
  88
  89 struct nfs_lock_context {
  90         atomic_t count;
  91         struct list_head list;
  92         struct nfs_open_context *open_context;
  93         struct nfs_lockowner lockowner;
  94 };
  95
  96 struct nfs4_state;
  97 struct nfs_open_context {
  98         struct nfs_lock_context lock_context;
  99         struct dentry *dentry;
 100         struct rpc_cred *cred;
 101         struct nfs4_state *state;
 102         fmode_t mode;
 103
 104         unsigned long flags;
 105 #define NFS_CONTEXT_ERROR_WRITE         (0)
 106 #define NFS_CONTEXT_RESEND_WRITES       (1)
 107         int error;
 108
 109         struct list_head list;
 110         struct nfs4_threshold   *mdsthreshold;
 111 };
 112
 113 struct nfs_open_dir_context {
 114         struct rpc_cred *cred;
 115         unsigned long attr_gencount;
 116         __u64 dir_cookie;
 117         __u64 dup_cookie;
 118         signed char duped;
 119 };
 120
 121 /*
 122  * NFSv4 delegation
 123  */
 124 struct nfs_delegation;
 125
 126 struct posix_acl;
 127
 128 /*
 129  * nfs fs inode data in memory
 130  */
 131 struct nfs_inode {
 132         /*
 133          * The 64bit 'inode number'
 134          */
 135         __u64 fileid;
 136
 137         /*
 138          * NFS file handle
 139          */
 140         struct nfs_fh           fh;
 141
 142         /*
 143          * Various flags
 144          */
 145         unsigned long           flags;                  /* atomic bit ops */
 146         unsigned long           cache_validity;         /* bit mask */
 147
 148         /*
 149          * read_cache_jiffies is when we started read-caching this inode.
 150          * attrtimeo is for how long the cached information is assumed
 151          * to be valid. A successful attribute revalidation doubles
 152          * attrtimeo (up to acregmax/acdirmax), a failure resets it to
 153          * acregmin/acdirmin.
 154          *
 155          * We need to revalidate the cached attrs for this inode if
 156          *
 157          *      jiffies - read_cache_jiffies >= attrtimeo
 158          *
 159          * Please note the comparison is greater than or equal
 160          * so that zero timeout values can be specified.
 161          */
 162         unsigned long           read_cache_jiffies;
 163         unsigned long           attrtimeo;
 164         unsigned long           attrtimeo_timestamp;
 165
 166         unsigned long           attr_gencount;
 167         /* "Generation counter" for the attribute cache. This is
 168          * bumped whenever we update the metadata on the
 169          * server.
 170          */
 171         unsigned long           cache_change_attribute;
 172
 173         struct rb_root          access_cache;
 174         struct list_head        access_cache_entry_lru;
 175         struct list_head        access_cache_inode_lru;
 176 #ifdef CONFIG_NFS_V3_ACL
 177         struct posix_acl        *acl_access;
 178         struct posix_acl        *acl_default;
 179 #endif
 180
 181         /*
 182          * This is the cookie verifier used for NFSv3 readdir
 183          * operations
 184          */
 185         __be32                  cookieverf[2];
 186
 187         unsigned long           npages;
 188         struct nfs_mds_commit_info commit_info;
 189
 190         /* Open contexts for shared mmap writes */
 191         struct list_head        open_files;
 192
 193         /* Number of in-flight sillydelete RPC calls */
 194         atomic_t                silly_count;
 195         /* List of deferred sillydelete requests */
 196         struct hlist_head       silly_list;
 197         wait_queue_head_t       waitqueue;
 198
 199 #if IS_ENABLED(CONFIG_NFS_V4)
 200         struct nfs4_cached_acl  *nfs4_acl;
 201         /* NFSv4 state */
 202         struct list_head        open_states;
 203         struct nfs_delegation __rcu *delegation;
 204         fmode_t                  delegation_state;
 205         struct rw_semaphore     rwsem;
 206
 207         /* pNFS layout information */
 208         struct pnfs_layout_hdr *layout;
 209 #endif /* CONFIG_NFS_V4*/
 210         /* how many bytes have been written/read and how many bytes queued up */
 211         __u64 write_io;
 212         __u64 read_io;
 213 #ifdef CONFIG_NFS_FSCACHE
 214         struct fscache_cookie   *fscache;
 215 #endif
 216         struct inode            vfs_inode;
 217 };
 218
 219 /*
 220  * Cache validity bit flags
 221  */
 222 #define NFS_INO_INVALID_ATTR    0x0001          /* cached attrs are invalid */
 223 #define NFS_INO_INVALID_DATA    0x0002          /* cached data is invalid */
 224 #define NFS_INO_INVALID_ATIME   0x0004          /* cached atime is invalid */
 225 #define NFS_INO_INVALID_ACCESS  0x0008          /* cached access cred invalid */
 226 #define NFS_INO_INVALID_ACL     0x0010          /* cached acls are invalid */
 227 #define NFS_INO_REVAL_PAGECACHE 0x0020          /* must revalidate pagecache */
 228 #define NFS_INO_REVAL_FORCED    0x0040          /* force revalidation ignoring a delegation */
 229
 230 /*
 231  * Bit offsets in flags field
 232  */
 233 #define NFS_INO_ADVISE_RDPLUS   (0)             /* advise readdirplus */
 234 #define NFS_INO_STALE           (1)             /* possible stale inode */
 235 #define NFS_INO_ACL_LRU_SET     (2)             /* Inode is on the LRU list */
 236 #define NFS_INO_FLUSHING        (4)             /* inode is flushing out data */
 237 #define NFS_INO_FSCACHE         (5)             /* inode can be cached by FS-Cache */
 238 #define NFS_INO_FSCACHE_LOCK    (6)             /* FS-Cache cookie management lock */
 239 #define NFS_INO_COMMIT          (7)             /* inode is committing unstable writes */
 240 #define NFS_INO_LAYOUTCOMMIT    (9)             /* layoutcommit required */
 241 #define NFS_INO_LAYOUTCOMMITTING (10)           /* layoutcommit inflight */
 242
 243 static inline struct nfs_inode *NFS_I(const struct inode *inode)
 244 {
 245         return container_of(inode, struct nfs_inode, vfs_inode);
 246 }
 247
 248 static inline struct nfs_server *NFS_SB(const struct super_block *s)
 249 {
 250         return (struct nfs_server *)(s->s_fs_info);
 251 }
 252
 253 static inline struct nfs_fh *NFS_FH(const struct inode *inode)
 254 {
 255         return &NFS_I(inode)->fh;
 256 }
 257
 258 static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
 259 {
 260         return NFS_SB(inode->i_sb);
 261 }
 262
 263 static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
 264 {
 265         return NFS_SERVER(inode)->client;
 266 }
 267
 268 static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
 269 {
 270         return NFS_SERVER(inode)->nfs_client->rpc_ops;
 271 }
 272
 273 static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode)
 274 {
 275         struct nfs_server *nfss = NFS_SERVER(inode);
 276         return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin;
 277 }
 278
 279 static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode)
 280 {
 281         struct nfs_server *nfss = NFS_SERVER(inode);
 282         return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax;
 283 }
 284
 285 static inline int NFS_STALE(const struct inode *inode)
 286 {
 287         return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
 288 }
 289
 290 static inline int NFS_FSCACHE(const struct inode *inode)
 291 {
 292         return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
 293 }
 294
 295 static inline __u64 NFS_FILEID(const struct inode *inode)
 296 {
 297         return NFS_I(inode)->fileid;
 298 }
 299
 300 static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
 301 {
 302         NFS_I(inode)->fileid = fileid;
 303 }
 304
 305 static inline void nfs_mark_for_revalidate(struct inode *inode)
 306 {
 307         struct nfs_inode *nfsi = NFS_I(inode);
 308
 309         spin_lock(&inode->i_lock);
 310         nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS;
 311         if (S_ISDIR(inode->i_mode))
 312                 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
 313         spin_unlock(&inode->i_lock);
 314 }
 315
 316 static inline int nfs_server_capable(struct inode *inode, int cap)
 317 {
 318         return NFS_SERVER(inode)->caps & cap;
 319 }
 320
 321 static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
 322 {
 323         dentry->d_time = verf;
 324 }
 325
 326 /**
 327  * nfs_save_change_attribute - Returns the inode attribute change cookie
 328  * @dir - pointer to parent directory inode
 329  * The "change attribute" is updated every time we finish an operation
 330  * that will result in a metadata change on the server.
 331  */
 332 static inline unsigned long nfs_save_change_attribute(struct inode *dir)
 333 {
 334         return NFS_I(dir)->cache_change_attribute;
 335 }
 336
 337 /**
 338  * nfs_verify_change_attribute - Detects NFS remote directory changes
 339  * @dir - pointer to parent directory inode
 340  * @chattr - previously saved change attribute
 341  * Return "false" if the verifiers doesn't match the change attribute.
 342  * This would usually indicate that the directory contents have changed on
 343  * the server, and that any dentries need revalidating.
 344  */
 345 static inline int nfs_verify_change_attribute(struct inode *dir, unsigned long chattr)
 346 {
 347         return chattr == NFS_I(dir)->cache_change_attribute;
 348 }
 349
 350 /*
 351  * linux/fs/nfs/inode.c
 352  */
 353 extern int nfs_sync_mapping(struct address_space *mapping);
 354 extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
 355 extern void nfs_zap_caches(struct inode *);
 356 extern void nfs_invalidate_atime(struct inode *);
 357 extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
 358                                 struct nfs_fattr *);
 359 extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
 360 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
 361 extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
 362 extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 363 extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
 364 extern void nfs_access_set_mask(struct nfs_access_entry *, u32);
 365 extern int nfs_permission(struct inode *, int);
 366 extern int nfs_open(struct inode *, struct file *);
 367 extern int nfs_release(struct inode *, struct file *);
 368 extern int nfs_attribute_timeout(struct inode *inode);
 369 extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
 370 extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
 371 extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
 372 extern int nfs_setattr(struct dentry *, struct iattr *);
 373 extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
 374 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
 375 extern void put_nfs_open_context(struct nfs_open_context *ctx);
 376 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
 377 extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode);
 378 extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
 379 extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
 380 extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
 381 extern u64 nfs_compat_user_ino64(u64 fileid);
 382 extern void nfs_fattr_init(struct nfs_fattr *fattr);
 383 extern unsigned long nfs_inc_attr_generation_counter(void);
 384
 385 extern struct nfs_fattr *nfs_alloc_fattr(void);
 386
 387 static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
 388 {
 389         kfree(fattr);
 390 }
 391
 392 extern struct nfs_fh *nfs_alloc_fhandle(void);
 393
 394 static inline void nfs_free_fhandle(const struct nfs_fh *fh)
 395 {
 396         kfree(fh);
 397 }
 398
 399 #ifdef NFS_DEBUG
 400 extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
 401 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
 402 {
 403         return _nfs_display_fhandle_hash(fh);
 404 }
 405 extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption);
 406 #define nfs_display_fhandle(fh, caption)                        \
 407         do {                                                    \
 408                 if (unlikely(nfs_debug & NFSDBG_FACILITY))      \
 409                         _nfs_display_fhandle(fh, caption);      \
 410         } while (0)
 411 #else
 412 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
 413 {
 414         return 0;
 415 }
 416 static inline void nfs_display_fhandle(const struct nfs_fh *fh,
 417                                        const char *caption)
 418 {
 419 }
 420 #endif
 421
 422 /*
 423  * linux/fs/nfs/nfsroot.c
 424  */
 425 extern int  nfs_root_data(char **root_device, char **root_data); /*__init*/
 426 /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
 427 extern __be32 root_nfs_parse_addr(char *name); /*__init*/
 428
 429 /*
 430  * linux/fs/nfs/file.c
 431  */
 432 extern const struct file_operations nfs_file_operations;
 433 #if IS_ENABLED(CONFIG_NFS_V4)
 434 extern const struct file_operations nfs4_file_operations;
 435 #endif /* CONFIG_NFS_V4 */
 436 extern const struct address_space_operations nfs_file_aops;
 437 extern const struct address_space_operations nfs_dir_aops;
 438
 439 static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
 440 {
 441         return filp->private_data;
 442 }
 443
 444 static inline struct rpc_cred *nfs_file_cred(struct file *file)
 445 {
 446         if (file != NULL) {
 447                 struct nfs_open_context *ctx =
 448                         nfs_file_open_context(file);
 449                 if (ctx)
 450                         return ctx->cred;
 451         }
 452         return NULL;
 453 }
 454
 455 /*
 456  * linux/fs/nfs/xattr.c
 457  */
 458 #ifdef CONFIG_NFS_V3_ACL
 459 extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
 460 extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
 461 extern int nfs3_setxattr(struct dentry *, const char *,
 462                         const void *, size_t, int);
 463 extern int nfs3_removexattr (struct dentry *, const char *name);
 464 #else
 465 # define nfs3_listxattr NULL
 466 # define nfs3_getxattr NULL
 467 # define nfs3_setxattr NULL
 468 # define nfs3_removexattr NULL
 469 #endif
 470
 471 /*
 472  * linux/fs/nfs/direct.c
 473  */
 474 extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
 475                         unsigned long);
 476 extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
 477                         const struct iovec *iov, unsigned long nr_segs,
 478                         loff_t pos, bool uio);
 479 extern ssize_t nfs_file_direct_write(struct kiocb *iocb,
 480                         const struct iovec *iov, unsigned long nr_segs,
 481                         loff_t pos, bool uio);
 482
 483 /*
 484  * linux/fs/nfs/dir.c
 485  */
 486 extern const struct file_operations nfs_dir_operations;
 487 extern const struct dentry_operations nfs_dentry_operations;
 488
 489 extern void nfs_force_lookup_revalidate(struct inode *dir);
 490 extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
 491 extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
 492 extern void nfs_access_zap_cache(struct inode *inode);
 493
 494 /*
 495  * linux/fs/nfs/symlink.c
 496  */
 497 extern const struct inode_operations nfs_symlink_inode_operations;
 498
 499 /*
 500  * linux/fs/nfs/sysctl.c
 501  */
 502 #ifdef CONFIG_SYSCTL
 503 extern int nfs_register_sysctl(void);
 504 extern void nfs_unregister_sysctl(void);
 505 #else
 506 #define nfs_register_sysctl() 0
 507 #define nfs_unregister_sysctl() do { } while(0)
 508 #endif
 509
 510 /*
 511  * linux/fs/nfs/namespace.c
 512  */
 513 extern const struct inode_operations nfs_mountpoint_inode_operations;
 514 extern const struct inode_operations nfs_referral_inode_operations;
 515 extern int nfs_mountpoint_expiry_timeout;
 516 extern void nfs_release_automount_timer(void);
 517
 518 /*
 519  * linux/fs/nfs/unlink.c
 520  */
 521 extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
 522 extern void nfs_block_sillyrename(struct dentry *dentry);
 523 extern void nfs_unblock_sillyrename(struct dentry *dentry);
 524 extern int  nfs_sillyrename(struct inode *dir, struct dentry *dentry);
 525
 526 /*
 527  * linux/fs/nfs/write.c
 528  */
 529 extern int  nfs_congestion_kb;
 530 extern int  nfs_writepage(struct page *page, struct writeback_control *wbc);
 531 extern int  nfs_writepages(struct address_space *, struct writeback_control *);
 532 extern int  nfs_flush_incompatible(struct file *file, struct page *page);
 533 extern int  nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
 534 extern void nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
 535
 536 /*
 537  * Try to write back everything synchronously (but check the
 538  * return value!)
 539  */
 540 extern int nfs_wb_all(struct inode *inode);
 541 extern int nfs_wb_page(struct inode *inode, struct page* page);
 542 extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
 543 #if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)
 544 extern int  nfs_commit_inode(struct inode *, int);
 545 extern struct nfs_commit_data *nfs_commitdata_alloc(void);
 546 extern void nfs_commit_free(struct nfs_commit_data *data);
 547 #else
 548 static inline int
 549 nfs_commit_inode(struct inode *inode, int how)
 550 {
 551         return 0;
 552 }
 553 #endif
 554
 555 static inline int
 556 nfs_have_writebacks(struct inode *inode)
 557 {
 558         return NFS_I(inode)->npages != 0;
 559 }
 560
 561 /*
 562  * linux/fs/nfs/read.c
 563  */
 564 extern int  nfs_readpage(struct file *, struct page *);
 565 extern int  nfs_readpages(struct file *, struct address_space *,
 566                 struct list_head *, unsigned);
 567 extern int  nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
 568 extern int  nfs_readpage_async(struct nfs_open_context *, struct inode *,
 569                                struct page *);
 570
 571 /*
 572  * linux/fs/nfs3proc.c
 573  */
 574 #ifdef CONFIG_NFS_V3_ACL
 575 extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
 576 extern int nfs3_proc_setacl(struct inode *inode, int type,
 577                             struct posix_acl *acl);
 578 extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
 579                 umode_t mode);
 580 extern void nfs3_forget_cached_acls(struct inode *inode);
 581 #else
 582 static inline int nfs3_proc_set_default_acl(struct inode *dir,
 583                                             struct inode *inode,
 584                                             umode_t mode)
 585 {
 586         return 0;
 587 }
 588
 589 static inline void nfs3_forget_cached_acls(struct inode *inode)
 590 {
 591 }
 592 #endif /* CONFIG_NFS_V3_ACL */
 593
 594 /*
 595  * inline functions
 596  */
 597
 598 static inline loff_t nfs_size_to_loff_t(__u64 size)
 599 {
 600         if (size > (__u64) OFFSET_MAX - 1)
 601                 return OFFSET_MAX - 1;
 602         return (loff_t) size;
 603 }
 604
 605 static inline ino_t
 606 nfs_fileid_to_ino_t(u64 fileid)
 607 {
 608         ino_t ino = (ino_t) fileid;
 609         if (sizeof(ino_t) < sizeof(u64))
 610                 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
 611         return ino;
 612 }
 613
 614 #define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
 615
 616 #endif /* __KERNEL__ */
 617
 618 /*
 619  * NFS debug flags
 620  */
 621 #define NFSDBG_VFS              0x0001
 622 #define NFSDBG_DIRCACHE         0x0002
 623 #define NFSDBG_LOOKUPCACHE      0x0004
 624 #define NFSDBG_PAGECACHE        0x0008
 625 #define NFSDBG_PROC             0x0010
 626 #define NFSDBG_XDR              0x0020
 627 #define NFSDBG_FILE             0x0040
 628 #define NFSDBG_ROOT             0x0080
 629 #define NFSDBG_CALLBACK         0x0100
 630 #define NFSDBG_CLIENT           0x0200
 631 #define NFSDBG_MOUNT            0x0400
 632 #define NFSDBG_FSCACHE          0x0800
 633 #define NFSDBG_PNFS             0x1000
 634 #define NFSDBG_PNFS_LD          0x2000
 635 #define NFSDBG_STATE            0x4000
 636 #define NFSDBG_ALL              0xFFFF
 637
 638 #ifdef __KERNEL__
 639
 640 # undef ifdebug
 641 # ifdef NFS_DEBUG
 642 #  define ifdebug(fac)          if (unlikely(nfs_debug & NFSDBG_##fac))
 643 #  define NFS_IFDEBUG(x)        x
 644 # else
 645 #  define ifdebug(fac)          if (0)
 646 #  define NFS_IFDEBUG(x)
 647 # endif
 648 #endif /* __KERNEL */
 649
 650 #endif