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