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 kuid_t fsuid; 65 kgid_t fsgid; 66 struct group_info *group_info; 67 __u32 mask; 68 struct rcu_head rcu_head; 69 }; 70 71 struct nfs_lock_context { 72 refcount_t count; 73 struct list_head list; 74 struct nfs_open_context *open_context; 75 fl_owner_t lockowner; 76 atomic_t io_count; 77 struct rcu_head rcu_head; 78 }; 79 80 struct nfs4_state; 81 struct nfs_open_context { 82 struct nfs_lock_context lock_context; 83 fl_owner_t flock_owner; 84 struct dentry *dentry; 85 const struct cred *cred; 86 struct rpc_cred __rcu *ll_cred; /* low-level cred - use to check for expiry */ 87 struct nfs4_state *state; 88 fmode_t mode; 89 90 unsigned long flags; 91 #define NFS_CONTEXT_RESEND_WRITES (1) 92 #define NFS_CONTEXT_BAD (2) 93 #define NFS_CONTEXT_UNLOCK (3) 94 #define NFS_CONTEXT_FILE_OPEN (4) 95 int error; 96 97 struct list_head list; 98 struct nfs4_threshold *mdsthreshold; 99 struct rcu_head rcu_head; 100 }; 101 102 struct nfs_open_dir_context { 103 struct list_head list; 104 unsigned long attr_gencount; 105 __be32 verf[NFS_DIR_VERIFIER_SIZE]; 106 __u64 dir_cookie; 107 __u64 dup_cookie; 108 pgoff_t page_index; 109 signed char duped; 110 }; 111 112 /* 113 * NFSv4 delegation 114 */ 115 struct nfs_delegation; 116 117 struct posix_acl; 118 119 struct nfs4_xattr_cache; 120 121 /* 122 * nfs fs inode data in memory 123 */ 124 struct nfs_inode { 125 /* 126 * The 64bit 'inode number' 127 */ 128 __u64 fileid; 129 130 /* 131 * NFS file handle 132 */ 133 struct nfs_fh fh; 134 135 /* 136 * Various flags 137 */ 138 unsigned long flags; /* atomic bit ops */ 139 unsigned long cache_validity; /* bit mask */ 140 141 /* 142 * read_cache_jiffies is when we started read-caching this inode. 143 * attrtimeo is for how long the cached information is assumed 144 * to be valid. A successful attribute revalidation doubles 145 * attrtimeo (up to acregmax/acdirmax), a failure resets it to 146 * acregmin/acdirmin. 147 * 148 * We need to revalidate the cached attrs for this inode if 149 * 150 * jiffies - read_cache_jiffies >= attrtimeo 151 * 152 * Please note the comparison is greater than or equal 153 * so that zero timeout values can be specified. 154 */ 155 unsigned long read_cache_jiffies; 156 unsigned long attrtimeo; 157 unsigned long attrtimeo_timestamp; 158 159 unsigned long attr_gencount; 160 161 struct rb_root access_cache; 162 struct list_head access_cache_entry_lru; 163 struct list_head access_cache_inode_lru; 164 165 union { 166 /* Directory */ 167 struct { 168 /* "Generation counter" for the attribute cache. 169 * This is bumped whenever we update the metadata 170 * on the server. 171 */ 172 unsigned long cache_change_attribute; 173 /* 174 * This is the cookie verifier used for NFSv3 readdir 175 * operations 176 */ 177 __be32 cookieverf[NFS_DIR_VERIFIER_SIZE]; 178 /* Readers: in-flight sillydelete RPC calls */ 179 /* Writers: rmdir */ 180 struct rw_semaphore rmdir_sem; 181 }; 182 /* Regular file */ 183 struct { 184 atomic_long_t nrequests; 185 struct nfs_mds_commit_info commit_info; 186 struct mutex commit_mutex; 187 }; 188 }; 189 190 /* Open contexts for shared mmap writes */ 191 struct list_head open_files; 192 193 #if IS_ENABLED(CONFIG_NFS_V4) 194 struct nfs4_cached_acl *nfs4_acl; 195 /* NFSv4 state */ 196 struct list_head open_states; 197 struct nfs_delegation __rcu *delegation; 198 struct rw_semaphore rwsem; 199 200 /* pNFS layout information */ 201 struct pnfs_layout_hdr *layout; 202 #endif /* CONFIG_NFS_V4*/ 203 /* how many bytes have been written/read and how many bytes queued up */ 204 __u64 write_io; 205 __u64 read_io; 206 #ifdef CONFIG_NFS_FSCACHE 207 struct fscache_cookie *fscache; 208 #endif 209 struct inode vfs_inode; 210 211 #ifdef CONFIG_NFS_V4_2 212 struct nfs4_xattr_cache *xattr_cache; 213 #endif 214 }; 215 216 struct nfs4_copy_state { 217 struct list_head copies; 218 struct list_head src_copies; 219 nfs4_stateid stateid; 220 struct completion completion; 221 uint64_t count; 222 struct nfs_writeverf verf; 223 int error; 224 int flags; 225 struct nfs4_state *parent_src_state; 226 struct nfs4_state *parent_dst_state; 227 }; 228 229 /* 230 * Access bit flags 231 */ 232 #define NFS_ACCESS_READ 0x0001 233 #define NFS_ACCESS_LOOKUP 0x0002 234 #define NFS_ACCESS_MODIFY 0x0004 235 #define NFS_ACCESS_EXTEND 0x0008 236 #define NFS_ACCESS_DELETE 0x0010 237 #define NFS_ACCESS_EXECUTE 0x0020 238 #define NFS_ACCESS_XAREAD 0x0040 239 #define NFS_ACCESS_XAWRITE 0x0080 240 #define NFS_ACCESS_XALIST 0x0100 241 242 /* 243 * Cache validity bit flags 244 */ 245 #define NFS_INO_INVALID_DATA BIT(1) /* cached data is invalid */ 246 #define NFS_INO_INVALID_ATIME BIT(2) /* cached atime is invalid */ 247 #define NFS_INO_INVALID_ACCESS BIT(3) /* cached access cred invalid */ 248 #define NFS_INO_INVALID_ACL BIT(4) /* cached acls are invalid */ 249 #define NFS_INO_REVAL_PAGECACHE BIT(5) /* must revalidate pagecache */ 250 #define NFS_INO_REVAL_FORCED BIT(6) /* force revalidation ignoring a delegation */ 251 #define NFS_INO_INVALID_LABEL BIT(7) /* cached label is invalid */ 252 #define NFS_INO_INVALID_CHANGE BIT(8) /* cached change is invalid */ 253 #define NFS_INO_INVALID_CTIME BIT(9) /* cached ctime is invalid */ 254 #define NFS_INO_INVALID_MTIME BIT(10) /* cached mtime is invalid */ 255 #define NFS_INO_INVALID_SIZE BIT(11) /* cached size is invalid */ 256 #define NFS_INO_INVALID_OTHER BIT(12) /* other attrs are invalid */ 257 #define NFS_INO_DATA_INVAL_DEFER \ 258 BIT(13) /* Deferred cache invalidation */ 259 #define NFS_INO_INVALID_BLOCKS BIT(14) /* cached blocks are invalid */ 260 #define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */ 261 #define NFS_INO_INVALID_NLINK BIT(16) /* cached nlinks is invalid */ 262 #define NFS_INO_INVALID_MODE BIT(17) /* cached mode is invalid */ 263 264 #define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \ 265 | NFS_INO_INVALID_CTIME \ 266 | NFS_INO_INVALID_MTIME \ 267 | NFS_INO_INVALID_SIZE \ 268 | NFS_INO_INVALID_NLINK \ 269 | NFS_INO_INVALID_MODE \ 270 | NFS_INO_INVALID_OTHER) /* inode metadata is invalid */ 271 272 /* 273 * Bit offsets in flags field 274 */ 275 #define NFS_INO_ADVISE_RDPLUS (0) /* advise readdirplus */ 276 #define NFS_INO_STALE (1) /* possible stale inode */ 277 #define NFS_INO_ACL_LRU_SET (2) /* Inode is on the LRU list */ 278 #define NFS_INO_INVALIDATING (3) /* inode is being invalidated */ 279 #define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */ 280 #define NFS_INO_FORCE_READDIR (7) /* force readdirplus */ 281 #define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */ 282 #define NFS_INO_LAYOUTCOMMITTING (10) /* layoutcommit inflight */ 283 #define NFS_INO_LAYOUTSTATS (11) /* layoutstats inflight */ 284 #define NFS_INO_ODIRECT (12) /* I/O setting is O_DIRECT */ 285 286 static inline struct nfs_inode *NFS_I(const struct inode *inode) 287 { 288 return container_of(inode, struct nfs_inode, vfs_inode); 289 } 290 291 static inline struct nfs_server *NFS_SB(const struct super_block *s) 292 { 293 return (struct nfs_server *)(s->s_fs_info); 294 } 295 296 static inline struct nfs_fh *NFS_FH(const struct inode *inode) 297 { 298 return &NFS_I(inode)->fh; 299 } 300 301 static inline struct nfs_server *NFS_SERVER(const struct inode *inode) 302 { 303 return NFS_SB(inode->i_sb); 304 } 305 306 static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode) 307 { 308 return NFS_SERVER(inode)->client; 309 } 310 311 static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode) 312 { 313 return NFS_SERVER(inode)->nfs_client->rpc_ops; 314 } 315 316 static inline unsigned NFS_MINATTRTIMEO(const struct inode *inode) 317 { 318 struct nfs_server *nfss = NFS_SERVER(inode); 319 return S_ISDIR(inode->i_mode) ? nfss->acdirmin : nfss->acregmin; 320 } 321 322 static inline unsigned NFS_MAXATTRTIMEO(const struct inode *inode) 323 { 324 struct nfs_server *nfss = NFS_SERVER(inode); 325 return S_ISDIR(inode->i_mode) ? nfss->acdirmax : nfss->acregmax; 326 } 327 328 static inline int NFS_STALE(const struct inode *inode) 329 { 330 return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags); 331 } 332 333 static inline struct fscache_cookie *nfs_i_fscache(struct inode *inode) 334 { 335 #ifdef CONFIG_NFS_FSCACHE 336 return NFS_I(inode)->fscache; 337 #else 338 return NULL; 339 #endif 340 } 341 342 static inline __u64 NFS_FILEID(const struct inode *inode) 343 { 344 return NFS_I(inode)->fileid; 345 } 346 347 static inline void set_nfs_fileid(struct inode *inode, __u64 fileid) 348 { 349 NFS_I(inode)->fileid = fileid; 350 } 351 352 static inline void nfs_mark_for_revalidate(struct inode *inode) 353 { 354 struct nfs_inode *nfsi = NFS_I(inode); 355 356 spin_lock(&inode->i_lock); 357 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE 358 | NFS_INO_INVALID_ACCESS 359 | NFS_INO_INVALID_ACL 360 | NFS_INO_INVALID_CHANGE 361 | NFS_INO_INVALID_CTIME; 362 if (S_ISDIR(inode->i_mode)) 363 nfsi->cache_validity |= NFS_INO_INVALID_DATA; 364 spin_unlock(&inode->i_lock); 365 } 366 367 static inline int nfs_server_capable(struct inode *inode, int cap) 368 { 369 return NFS_SERVER(inode)->caps & cap; 370 } 371 372 /** 373 * nfs_save_change_attribute - Returns the inode attribute change cookie 374 * @dir - pointer to parent directory inode 375 * The "cache change attribute" is updated when we need to revalidate 376 * our dentry cache after a directory was seen to change on the server. 377 */ 378 static inline unsigned long nfs_save_change_attribute(struct inode *dir) 379 { 380 return NFS_I(dir)->cache_change_attribute; 381 } 382 383 /* 384 * linux/fs/nfs/inode.c 385 */ 386 extern int nfs_sync_mapping(struct address_space *mapping); 387 extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping); 388 extern void nfs_zap_caches(struct inode *); 389 extern void nfs_set_inode_stale(struct inode *inode); 390 extern void nfs_invalidate_atime(struct inode *); 391 extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *, 392 struct nfs_fattr *); 393 struct inode *nfs_ilookup(struct super_block *sb, struct nfs_fattr *, struct nfs_fh *); 394 extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *); 395 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr); 396 extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr); 397 extern int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr); 398 extern int nfs_getattr(struct user_namespace *, const struct path *, 399 struct kstat *, u32, unsigned int); 400 extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *, const struct cred *); 401 extern void nfs_access_set_mask(struct nfs_access_entry *, u32); 402 extern int nfs_permission(struct user_namespace *, struct inode *, int); 403 extern int nfs_open(struct inode *, struct file *); 404 extern int nfs_attribute_cache_expired(struct inode *inode); 405 extern int nfs_revalidate_inode(struct inode *inode, unsigned long flags); 406 extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); 407 extern int nfs_clear_invalid_mapping(struct address_space *mapping); 408 extern bool nfs_mapping_need_revalidate_inode(struct inode *inode); 409 extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); 410 extern int nfs_revalidate_mapping_rcu(struct inode *inode); 411 extern int nfs_setattr(struct user_namespace *, struct dentry *, struct iattr *); 412 extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, struct nfs_fattr *); 413 extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr); 414 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); 415 extern void put_nfs_open_context(struct nfs_open_context *ctx); 416 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode); 417 extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode, struct file *filp); 418 extern void nfs_inode_attach_open_context(struct nfs_open_context *ctx); 419 extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx); 420 extern void nfs_file_clear_open_context(struct file *flip); 421 extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx); 422 extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx); 423 extern u64 nfs_compat_user_ino64(u64 fileid); 424 extern void nfs_fattr_init(struct nfs_fattr *fattr); 425 extern void nfs_fattr_set_barrier(struct nfs_fattr *fattr); 426 extern unsigned long nfs_inc_attr_generation_counter(void); 427 428 extern struct nfs_fattr *nfs_alloc_fattr(void); 429 extern struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server); 430 431 static inline void nfs4_label_free(struct nfs4_label *label) 432 { 433 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 434 if (label) { 435 kfree(label->label); 436 kfree(label); 437 } 438 #endif 439 } 440 441 static inline void nfs_free_fattr(const struct nfs_fattr *fattr) 442 { 443 if (fattr) 444 nfs4_label_free(fattr->label); 445 kfree(fattr); 446 } 447 448 extern struct nfs_fh *nfs_alloc_fhandle(void); 449 450 static inline void nfs_free_fhandle(const struct nfs_fh *fh) 451 { 452 kfree(fh); 453 } 454 455 #ifdef NFS_DEBUG 456 extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh); 457 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) 458 { 459 return _nfs_display_fhandle_hash(fh); 460 } 461 extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption); 462 #define nfs_display_fhandle(fh, caption) \ 463 do { \ 464 if (unlikely(nfs_debug & NFSDBG_FACILITY)) \ 465 _nfs_display_fhandle(fh, caption); \ 466 } while (0) 467 #else 468 static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh) 469 { 470 return 0; 471 } 472 static inline void nfs_display_fhandle(const struct nfs_fh *fh, 473 const char *caption) 474 { 475 } 476 #endif 477 478 /* 479 * linux/fs/nfs/nfsroot.c 480 */ 481 extern int nfs_root_data(char **root_device, char **root_data); /*__init*/ 482 /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */ 483 extern __be32 root_nfs_parse_addr(char *name); /*__init*/ 484 485 /* 486 * linux/fs/nfs/file.c 487 */ 488 extern const struct file_operations nfs_file_operations; 489 #if IS_ENABLED(CONFIG_NFS_V4) 490 extern const struct file_operations nfs4_file_operations; 491 #endif /* CONFIG_NFS_V4 */ 492 extern const struct address_space_operations nfs_file_aops; 493 extern const struct address_space_operations nfs_dir_aops; 494 495 static inline struct nfs_open_context *nfs_file_open_context(struct file *filp) 496 { 497 return filp->private_data; 498 } 499 500 static inline const struct cred *nfs_file_cred(struct file *file) 501 { 502 if (file != NULL) { 503 struct nfs_open_context *ctx = 504 nfs_file_open_context(file); 505 if (ctx) 506 return ctx->cred; 507 } 508 return NULL; 509 } 510 511 /* 512 * linux/fs/nfs/direct.c 513 */ 514 extern ssize_t nfs_direct_IO(struct kiocb *, struct iov_iter *); 515 extern ssize_t nfs_file_direct_read(struct kiocb *iocb, 516 struct iov_iter *iter); 517 extern ssize_t nfs_file_direct_write(struct kiocb *iocb, 518 struct iov_iter *iter); 519 520 /* 521 * linux/fs/nfs/dir.c 522 */ 523 extern const struct file_operations nfs_dir_operations; 524 extern const struct dentry_operations nfs_dentry_operations; 525 526 extern void nfs_force_lookup_revalidate(struct inode *dir); 527 extern void nfs_set_verifier(struct dentry * dentry, unsigned long verf); 528 #if IS_ENABLED(CONFIG_NFS_V4) 529 extern void nfs_clear_verifier_delegated(struct inode *inode); 530 #endif /* IS_ENABLED(CONFIG_NFS_V4) */ 531 extern struct dentry *nfs_add_or_obtain(struct dentry *dentry, 532 struct nfs_fh *fh, struct nfs_fattr *fattr); 533 extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, 534 struct nfs_fattr *fattr); 535 extern int nfs_may_open(struct inode *inode, const struct cred *cred, int openflags); 536 extern void nfs_access_zap_cache(struct inode *inode); 537 extern int nfs_access_get_cached(struct inode *inode, const struct cred *cred, 538 u32 *mask, bool may_block); 539 540 /* 541 * linux/fs/nfs/symlink.c 542 */ 543 extern const struct inode_operations nfs_symlink_inode_operations; 544 545 /* 546 * linux/fs/nfs/sysctl.c 547 */ 548 #ifdef CONFIG_SYSCTL 549 extern int nfs_register_sysctl(void); 550 extern void nfs_unregister_sysctl(void); 551 #else 552 #define nfs_register_sysctl() 0 553 #define nfs_unregister_sysctl() do { } while(0) 554 #endif 555 556 /* 557 * linux/fs/nfs/namespace.c 558 */ 559 extern const struct inode_operations nfs_mountpoint_inode_operations; 560 extern const struct inode_operations nfs_referral_inode_operations; 561 extern int nfs_mountpoint_expiry_timeout; 562 extern void nfs_release_automount_timer(void); 563 564 /* 565 * linux/fs/nfs/unlink.c 566 */ 567 extern void nfs_complete_unlink(struct dentry *dentry, struct inode *); 568 569 /* 570 * linux/fs/nfs/write.c 571 */ 572 extern int nfs_congestion_kb; 573 extern int nfs_writepage(struct page *page, struct writeback_control *wbc); 574 extern int nfs_writepages(struct address_space *, struct writeback_control *); 575 extern int nfs_flush_incompatible(struct file *file, struct page *page); 576 extern int nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int); 577 578 /* 579 * Try to write back everything synchronously (but check the 580 * return value!) 581 */ 582 extern int nfs_sync_inode(struct inode *inode); 583 extern int nfs_wb_all(struct inode *inode); 584 extern int nfs_wb_page(struct inode *inode, struct page *page); 585 extern int nfs_wb_page_cancel(struct inode *inode, struct page* page); 586 extern int nfs_commit_inode(struct inode *, int); 587 extern struct nfs_commit_data *nfs_commitdata_alloc(bool never_fail); 588 extern void nfs_commit_free(struct nfs_commit_data *data); 589 bool nfs_commit_end(struct nfs_mds_commit_info *cinfo); 590 591 static inline int 592 nfs_have_writebacks(struct inode *inode) 593 { 594 if (S_ISREG(inode->i_mode)) 595 return atomic_long_read(&NFS_I(inode)->nrequests) != 0; 596 return 0; 597 } 598 599 /* 600 * linux/fs/nfs/read.c 601 */ 602 extern int nfs_readpage(struct file *, struct page *); 603 extern int nfs_readpages(struct file *, struct address_space *, 604 struct list_head *, unsigned); 605 606 /* 607 * inline functions 608 */ 609 610 static inline loff_t nfs_size_to_loff_t(__u64 size) 611 { 612 return min_t(u64, size, OFFSET_MAX); 613 } 614 615 static inline ino_t 616 nfs_fileid_to_ino_t(u64 fileid) 617 { 618 ino_t ino = (ino_t) fileid; 619 if (sizeof(ino_t) < sizeof(u64)) 620 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8; 621 return ino; 622 } 623 624 #define NFS_JUKEBOX_RETRY_TIME (5 * HZ) 625 626 627 # undef ifdebug 628 # ifdef NFS_DEBUG 629 # define ifdebug(fac) if (unlikely(nfs_debug & NFSDBG_##fac)) 630 # define NFS_IFDEBUG(x) x 631 # else 632 # define ifdebug(fac) if (0) 633 # define NFS_IFDEBUG(x) 634 # endif 635 #endif 636