1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * linux/include/linux/nfs_fs.h 4 * 5 * Copyright (C) 1992 Rick Sladkey 6 * 7 * OS-specific nfs filesystem definitions and declarations 8 */ 9 #ifndef _LINUX_NFS_FS_H 10 #define _LINUX_NFS_FS_H 11 12 #include <uapi/linux/nfs_fs.h> 13 14 15 /* 16 * Enable dprintk() debugging support for nfs client. 17 */ 18 #ifdef CONFIG_NFS_DEBUG 19 # define NFS_DEBUG 20 #endif 21 22 #include <linux/in.h> 23 #include <linux/mm.h> 24 #include <linux/pagemap.h> 25 #include <linux/rbtree.h> 26 #include <linux/refcount.h> 27 #include <linux/rwsem.h> 28 #include <linux/wait.h> 29 30 #include <linux/sunrpc/debug.h> 31 #include <linux/sunrpc/auth.h> 32 #include <linux/sunrpc/clnt.h> 33 34 #include <linux/nfs.h> 35 #include <linux/nfs2.h> 36 #include <linux/nfs3.h> 37 #include <linux/nfs4.h> 38 #include <linux/nfs_xdr.h> 39 #include <linux/nfs_fs_sb.h> 40 41 #include <linux/mempool.h> 42 43 /* 44 * These are the default for number of transports to different server IPs 45 */ 46 #define NFS_MAX_TRANSPORTS 16 47 48 /* 49 * These are the default flags for swap requests 50 */ 51 #define NFS_RPC_SWAPFLAGS (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) 52 53 /* 54 * Size of the NFS directory verifier 55 */ 56 #define NFS_DIR_VERIFIER_SIZE 2 57 58 /* 59 * NFSv3/v4 Access mode cache entry 60 */ 61 struct nfs_access_entry { 62 struct rb_node rb_node; 63 struct list_head lru; 64 const struct cred * cred; 65 __u32 mask; 66 struct rcu_head rcu_head; 67 }; 68 69 struct nfs_lock_context { 70 refcount_t count; 71 struct list_head list; 72 struct nfs_open_context *open_context; 73 fl_owner_t lockowner; 74 atomic_t io_count; 75 struct rcu_head rcu_head; 76 }; 77 78 struct nfs4_state; 79 struct nfs_open_context { 80 struct nfs_lock_context lock_context; 81 fl_owner_t flock_owner; 82 struct dentry *dentry; 83 const struct cred *cred; 84 struct rpc_cred __rcu *ll_cred; /* low-level cred - use to check for expiry */ 85 struct nfs4_state *state; 86 fmode_t mode; 87 88 unsigned long flags; 89 #define NFS_CONTEXT_RESEND_WRITES (1) 90 #define NFS_CONTEXT_BAD (2) 91 #define NFS_CONTEXT_UNLOCK (3) 92 #define NFS_CONTEXT_FILE_OPEN (4) 93 int error; 94 95 struct list_head list; 96 struct nfs4_threshold *mdsthreshold; 97 struct rcu_head rcu_head; 98 }; 99 100 struct nfs_open_dir_context { 101 struct list_head list; 102 unsigned long attr_gencount; 103 __be32 verf[NFS_DIR_VERIFIER_SIZE]; 104 __u64 dir_cookie; 105 __u64 dup_cookie; 106 pgoff_t page_index; 107 signed char duped; 108 }; 109 110 /* 111 * NFSv4 delegation 112 */ 113 struct nfs_delegation; 114 115 struct posix_acl; 116 117 struct nfs4_xattr_cache; 118 119 /* 120 * nfs fs inode data in memory 121 */ 122 struct nfs_inode { 123 /* 124 * The 64bit 'inode number' 125 */ 126 __u64 fileid; 127 128 /* 129 * NFS file handle 130 */ 131 struct nfs_fh fh; 132 133 /* 134 * Various flags 135 */ 136 unsigned long flags; /* atomic bit ops */ 137 unsigned long cache_validity; /* bit mask */ 138 139 /* 140 * read_cache_jiffies is when we started read-caching this inode. 141 * attrtimeo is for how long the cached information is assumed 142 * to be valid. A successful attribute revalidation doubles 143 * attrtimeo (up to acregmax/acdirmax), a failure resets it to 144 * acregmin/acdirmin. 145 * 146 * We need to revalidate the cached attrs for this inode if 147 * 148 * jiffies - read_cache_jiffies >= attrtimeo 149 * 150 * Please note the comparison is greater than or equal 151 * so that zero timeout values can be specified. 152 */ 153 unsigned long read_cache_jiffies; 154 unsigned long attrtimeo; 155 unsigned long attrtimeo_timestamp; 156 157 unsigned long attr_gencount; 158 159 struct rb_root access_cache; 160 struct list_head access_cache_entry_lru; 161 struct list_head access_cache_inode_lru; 162 163 union { 164 /* Directory */ 165 struct { 166 /* "Generation counter" for the attribute cache. 167 * This is bumped whenever we update the metadata 168 * on the server. 169 */ 170 unsigned long cache_change_attribute; 171 /* 172 * This is the cookie verifier used for NFSv3 readdir 173 * operations 174 */ 175 __be32 cookieverf[NFS_DIR_VERIFIER_SIZE]; 176 /* Readers: in-flight sillydelete RPC calls */ 177 /* Writers: rmdir */ 178 struct rw_semaphore rmdir_sem; 179 }; 180 /* Regular file */ 181 struct { 182 atomic_long_t nrequests; 183 struct nfs_mds_commit_info commit_info; 184 struct mutex commit_mutex; 185 }; 186 }; 187 188 /* Open contexts for shared mmap writes */ 189 struct list_head open_files; 190 191 #if IS_ENABLED(CONFIG_NFS_V4) 192 struct nfs4_cached_acl *nfs4_acl; 193 /* NFSv4 state */ 194 struct list_head open_states; 195 struct nfs_delegation __rcu *delegation; 196 struct rw_semaphore rwsem; 197 198 /* pNFS layout information */ 199 struct pnfs_layout_hdr *layout; 200 #endif /* CONFIG_NFS_V4*/ 201 /* how many bytes have been written/read and how many bytes queued up */ 202 __u64 write_io; 203 __u64 read_io; 204 #ifdef CONFIG_NFS_FSCACHE 205 struct fscache_cookie *fscache; 206 #endif 207 struct inode vfs_inode; 208 209 #ifdef CONFIG_NFS_V4_2 210 struct nfs4_xattr_cache *xattr_cache; 211 #endif 212 }; 213 214 struct nfs4_copy_state { 215 struct list_head copies; 216 struct list_head src_copies; 217 nfs4_stateid stateid; 218 struct completion completion; 219 uint64_t count; 220 struct nfs_writeverf verf; 221 int error; 222 int flags; 223 struct nfs4_state *parent_src_state; 224 struct nfs4_state *parent_dst_state; 225 }; 226 227 /* 228 * Access bit flags 229 */ 230 #define NFS_ACCESS_READ 0x0001 231 #define NFS_ACCESS_LOOKUP 0x0002 232 #define NFS_ACCESS_MODIFY 0x0004 233 #define NFS_ACCESS_EXTEND 0x0008 234 #define NFS_ACCESS_DELETE 0x0010 235 #define NFS_ACCESS_EXECUTE 0x0020 236 #define NFS_ACCESS_XAREAD 0x0040 237 #define NFS_ACCESS_XAWRITE 0x0080 238 #define NFS_ACCESS_XALIST 0x0100 239 240 /* 241 * Cache validity bit flags 242 */ 243 #define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ 244 #define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ 245 #define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ 246 #define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ 247 #define NFS_INO_REVAL_PAGECACHE BIT(5) /* must revalidate pagecache */ 248 #define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ 249 #define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ 250 #define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ 251 #define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ 252 #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ 253 #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ 254 #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ 255 #define NFS_INO_DATA_INVAL_DEFER \ 256 BIT(13) /* Deferred cache invalidation */ 257 #define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */ 258 #define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */ 259 #define NFS_INO_INVALID_NLINK BIT(16) /* cached nlinks is invalid */ 260 #define NFS_INO_INVALID_MODE BIT(17) /* cached mode is invalid */ 261 262 #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ 263 | NFS_INO_INVALID_CTIME \ 264 | NFS_INO_INVALID_MTIME \ 265 | NFS_INO_INVALID_SIZE \ 266 | NFS_INO_INVALID_NLINK \ 267 | NFS_INO_INVALID_MODE \ 268 | NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ 269 270 /* 271 * Bit offsets in flags field 272 */ 273 #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ 274 #define NFS_INO_STALE (1) /* possible stale inode */ 275 #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ 276 #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ 277 #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ 278 #define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */ 279 #define NFS_INO_FORCE_READDIR (7) /* force readdirplus */ 280 #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ 281 #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ 282 #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ 283 #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ 284 285 static inline struct nfs_inode *NFS_I(const struct inode *inode) 286 { 287 return container_of(inode, struct nfs_inode, vfs_inode); 288 } 289 290 static inline struct nfs_server *NFS_SB(const struct super_block *s) 291 { 292 return (struct nfs_server *)(s->s_fs_info); 293 } 294 295 static inline struct nfs_fh *NFS_FH(const struct inode *inode) 296 { 297 return &NFS_I(inode)->fh; 298 } 299 300 static inline struct nfs_server *NFS_SERVER(const struct inode *inode) 301 { 302 return NFS_SB(inode->i_sb); 303 } 304 305 static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) 306 { 307 return NFS_SERVER(inode)->client; 308 } 309 310 static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) 311 { 312 return NFS_SERVER(inode)->nfs_client->rpc_ops; 313 } 314 315 static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) 316 { 317 struct nfs_server *nfss = NFS_SERVER(inode); 318 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; 319 } 320 321 static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) 322 { 323 struct nfs_server *nfss = NFS_SERVER(inode); 324 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; 325 } 326 327 static inline int NFS_STALE(const struct inode *inode) 328 { 329 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); 330 } 331 332 static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) 333 { 334 #ifdef CONFIG_NFS_FSCACHE 335 return NFS_I(inode)->fscache; 336 #else 337 return NULL; 338 #endif 339 } 340 341 static inline __u64 NFS_FILEID(const struct inode *inode) 342 { 343 return NFS_I(inode)->fileid; 344 } 345 346 static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) 347 { 348 NFS_I(inode)->fileid = fileid; 349 } 350 351 static inline void nfs_mark_for_revalidate(struct inode *inode) 352 { 353 struct nfs_inode *nfsi = NFS_I(inode); 354 355 spin_lock(&inode->i_lock); 356 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE 357 | NFS_INO_INVALID_ACCESS 358 | NFS_INO_INVALID_ACL 359 | NFS_INO_INVALID_CHANGE 360 | NFS_INO_INVALID_CTIME; 361 if (S_ISDIR(inode->i_mode)) 362 nfsi->cache_validity |= NFS_INO_INVALID_DATA; 363 spin_unlock(&inode->i_lock); 364 } 365 366 static inline int nfs_server_capable(struct inode *inode, int cap) 367 { 368 return NFS_SERVER(inode)->caps & cap; 369 } 370 371 /** 372 * nfs_save_change_attribute - Returns the inode attribute change cookie 373 * @dir - pointer to parent directory inode 374 * The "cache change attribute" is updated when we need to revalidate 375 * our dentry cache after a directory was seen to change on the server. 376 */ 377 static inline unsigned long nfs_save_change_attribute(struct inode *dir) 378 { 379 return NFS_I(dir)->cache_change_attribute; 380 } 381 382 /* 383 * linux/fs/nfs/inode.c 384 */ 385 extern int nfs_sync_mapping(struct address_space *mapping); 386 extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); 387 extern void nfs_zap_caches(struct inode *); 388 extern void nfs_set_inode_stale(struct inode *inode); 389 extern void nfs_invalidate_atime(struct inode *); 390 extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, 391 struct nfs_fattr *); 392 struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); 393 extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); 394 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); 395 extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); 396 extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); 397 extern int nfs_getattr(struct user_namespace *, const struct path *, 398 struct kstat *, u32, unsigned int); 399 extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *); 400 extern void nfs_access_set_mask(struct nfs_access_entry *, u32); 401 extern int nfs_permission(struct user_namespace *, struct inode *, int); 402 extern int nfs_open(struct inode *, struct file *); 403 extern int nfs_attribute_cache_expired(struct inode *inode); 404 extern int nfs_revalidate_inode(struct inode *inode, unsigned long flags); 405 extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); 406 extern int nfs_clear_invalid_mapping(struct address_space *mapping); 407 extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); 408 extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); 409 extern int nfs_revalidate_mapping_rcu(struct inode *inode); 410 extern int nfs_setattr(struct user_namespace *, struct dentry *, struct iattr *); 411 extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); 412 extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr); 413 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); 414 extern void put_nfs_open_context(struct nfs_open_context *ctx); 415 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); 416 extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); 417 extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); 418 extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); 419 extern void nfs_file_clear_open_context(struct file *flip); 420 extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); 421 extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); 422 extern u64 nfs_compat_user_ino64(u64 fileid); 423 extern void nfs_fattr_init(struct nfs_fattr *fattr); 424 extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); 425 extern unsigned long nfs_inc_attr_generation_counter(void); 426 427 extern struct nfs_fattr *nfs_alloc_fattr(void); 428 extern struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server); 429 430 static inline void nfs4_label_free(struct nfs4_label *label) 431 { 432 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 433 if (label) { 434 kfree(label->label); 435 kfree(label); 436 } 437 #endif 438 } 439 440 static inline void nfs_free_fattr(const struct nfs_fattr *fattr) 441 { 442 if (fattr) 443 nfs4_label_free(fattr->label); 444 kfree(fattr); 445 } 446 447 extern struct nfs_fh *nfs_alloc_fhandle(void); 448 449 static inline void nfs_free_fhandle(const struct nfs_fh *fh) 450 { 451 kfree(fh); 452 } 453 454 #ifdef NFS_DEBUG 455 extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); 456 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) 457 { 458 return _nfs_display_fhandle_hash(fh); 459 } 460 extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); 461 #define nfs_display_fhandle(fh, caption) \ 462 do { \ 463 if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ 464 _nfs_display_fhandle(fh, caption); \ 465 } while (0) 466 #else 467 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) 468 { 469 return 0; 470 } 471 static inline void nfs_display_fhandle(const struct nfs_fh *fh, 472 const char *caption) 473 { 474 } 475 #endif 476 477 /* 478 * linux/fs/nfs/nfsroot.c 479 */ 480 extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ 481 /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ 482 extern __be32 root_nfs_parse_addr(char *name); /*__init*/ 483 484 /* 485 * linux/fs/nfs/file.c 486 */ 487 extern const struct file_operations nfs_file_operations; 488 #if IS_ENABLED(CONFIG_NFS_V4) 489 extern const struct file_operations nfs4_file_operations; 490 #endif /* CONFIG_NFS_V4 */ 491 extern const struct address_space_operations nfs_file_aops; 492 extern const struct address_space_operations nfs_dir_aops; 493 494 static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) 495 { 496 return filp->private_data; 497 } 498 499 static inline const struct cred *nfs_file_cred(struct file *file) 500 { 501 if (file != NULL) { 502 struct nfs_open_context *ctx = 503 nfs_file_open_context(file); 504 if (ctx) 505 return ctx->cred; 506 } 507 return NULL; 508 } 509 510 /* 511 * linux/fs/nfs/direct.c 512 */ 513 extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *); 514 extern ssize_t nfs_file_direct_read(struct kiocb *iocb, 515 struct iov_iter *iter); 516 extern ssize_t nfs_file_direct_write(struct kiocb *iocb, 517 struct iov_iter *iter); 518 519 /* 520 * linux/fs/nfs/dir.c 521 */ 522 extern const struct file_operations nfs_dir_operations; 523 extern const struct dentry_operations nfs_dentry_operations; 524 525 extern void nfs_force_lookup_revalidate(struct inode *dir); 526 extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); 527 #if IS_ENABLED(CONFIG_NFS_V4) 528 extern void nfs_clear_verifier_delegated(struct inode *inode); 529 #endif /* IS_ENABLED(CONFIG_NFS_V4) */ 530 extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, 531 struct nfs_fh *fh, struct nfs_fattr *fattr); 532 extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, 533 struct nfs_fattr *fattr); 534 extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); 535 extern void nfs_access_zap_cache(struct inode *inode); 536 extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, struct nfs_access_entry *res, 537 bool may_block); 538 539 /* 540 * linux/fs/nfs/symlink.c 541 */ 542 extern const struct inode_operations nfs_symlink_inode_operations; 543 544 /* 545 * linux/fs/nfs/sysctl.c 546 */ 547 #ifdef CONFIG_SYSCTL 548 extern int nfs_register_sysctl(void); 549 extern void nfs_unregister_sysctl(void); 550 #else 551 #define nfs_register_sysctl() 0 552 #define nfs_unregister_sysctl() do { } while(0) 553 #endif 554 555 /* 556 * linux/fs/nfs/namespace.c 557 */ 558 extern const struct inode_operations nfs_mountpoint_inode_operations; 559 extern const struct inode_operations nfs_referral_inode_operations; 560 extern int nfs_mountpoint_expiry_timeout; 561 extern void nfs_release_automount_timer(void); 562 563 /* 564 * linux/fs/nfs/unlink.c 565 */ 566 extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); 567 568 /* 569 * linux/fs/nfs/write.c 570 */ 571 extern int nfs_congestion_kb; 572 extern int nfs_writepage(struct page *page, struct writeback_control *wbc); 573 extern int nfs_writepages(struct address_space *, struct writeback_control *); 574 extern int nfs_flush_incompatible(struct file *file, struct page *page); 575 extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); 576 577 /* 578 * Try to write back everything synchronously (but check the 579 * return value!) 580 */ 581 extern int nfs_sync_inode(struct inode *inode); 582 extern int nfs_wb_all(struct inode *inode); 583 extern int nfs_wb_page(struct inode *inode, struct page *page); 584 extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); 585 extern int nfs_commit_inode(struct inode *, int); 586 extern struct nfs_commit_data *nfs_commitdata_alloc(bool never_fail); 587 extern void nfs_commit_free(struct nfs_commit_data *data); 588 bool nfs_commit_end(struct nfs_mds_commit_info *cinfo); 589 590 static inline int 591 nfs_have_writebacks(struct inode *inode) 592 { 593 if (S_ISREG(inode->i_mode)) 594 return atomic_long_read(&NFS_I(inode)->nrequests) != 0; 595 return 0; 596 } 597 598 /* 599 * linux/fs/nfs/read.c 600 */ 601 extern int nfs_readpage(struct file *, struct page *); 602 extern int nfs_readpages(struct file *, struct address_space *, 603 struct list_head *, unsigned); 604 605 /* 606 * inline functions 607 */ 608 609 static inline loff_t nfs_size_to_loff_t(__u64 size) 610 { 611 return min_t(u64, size, OFFSET_MAX); 612 } 613 614 static inline ino_t 615 nfs_fileid_to_ino_t(u64 fileid) 616 { 617 ino_t ino = (ino_t) fileid; 618 if (sizeof(ino_t) < sizeof(u64)) 619 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; 620 return ino; 621 } 622 623 #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) 624 625 626 # undef ifdebug 627 # ifdef NFS_DEBUG 628 # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) 629 # define NFS_IFDEBUG(x) x 630 # else 631 # define ifdebug(fac) if (0) 632 # define NFS_IFDEBUG(x) 633 # endif 634 #endif 635