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/config.h>
  13 #include <linux/in.h>
  14 #include <linux/mm.h>
  15 #include <linux/pagemap.h>
  16 #include <linux/rwsem.h>
  17 #include <linux/wait.h>
  18
  19 #include <linux/nfs_fs_sb.h>
  20
  21 #include <linux/sunrpc/debug.h>
  22 #include <linux/sunrpc/auth.h>
  23 #include <linux/sunrpc/clnt.h>
  24
  25 #include <linux/nfs.h>
  26 #include <linux/nfs2.h>
  27 #include <linux/nfs3.h>
  28 #include <linux/nfs4.h>
  29 #include <linux/nfs_xdr.h>
  30 #include <linux/rwsem.h>
  31 #include <linux/mempool.h>
  32
  33 /*
  34  * Enable debugging support for nfs client.
  35  * Requires RPC_DEBUG.
  36  */
  37 #ifdef RPC_DEBUG
  38 # define NFS_DEBUG
  39 #endif
  40
  41 /* Default timeout values */
  42 #define NFS_MAX_UDP_TIMEOUT     (60*HZ)
  43 #define NFS_MAX_TCP_TIMEOUT     (600*HZ)
  44
  45 /*
  46  * superblock magic number for NFS
  47  */
  48 #define NFS_SUPER_MAGIC                 0x6969
  49
  50 /*
  51  * These are the default flags for swap requests
  52  */
  53 #define NFS_RPC_SWAPFLAGS               (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS)
  54
  55 /*
  56  * When flushing a cluster of dirty pages, there can be different
  57  * strategies:
  58  */
  59 #define FLUSH_AGING             0       /* only flush old buffers */
  60 #define FLUSH_SYNC              1       /* file being synced, or contention */
  61 #define FLUSH_WAIT              2       /* wait for completion */
  62 #define FLUSH_STABLE            4       /* commit to stable storage */
  63 #define FLUSH_LOWPRI            8       /* low priority background flush */
  64 #define FLUSH_HIGHPRI           16      /* high priority memory reclaim flush */
  65 #define FLUSH_NOCOMMIT          32      /* Don't send the NFSv3/v4 COMMIT */
  66
  67 #ifdef __KERNEL__
  68
  69 /*
  70  * NFSv3/v4 Access mode cache entry
  71  */
  72 struct nfs_access_entry {
  73         unsigned long           jiffies;
  74         struct rpc_cred *       cred;
  75         int                     mask;
  76 };
  77
  78 struct nfs4_state;
  79 struct nfs_open_context {
  80         atomic_t count;
  81         struct dentry *dentry;
  82         struct rpc_cred *cred;
  83         struct nfs4_state *state;
  84         fl_owner_t lockowner;
  85         int mode;
  86         int error;
  87
  88         struct list_head list;
  89
  90         __u64 dir_cookie;
  91 };
  92
  93 /*
  94  * NFSv4 delegation
  95  */
  96 struct nfs_delegation;
  97
  98 struct posix_acl;
  99
 100 /*
 101  * nfs fs inode data in memory
 102  */
 103 struct nfs_inode {
 104         /*
 105          * The 64bit 'inode number'
 106          */
 107         __u64 fileid;
 108
 109         /*
 110          * NFS file handle
 111          */
 112         struct nfs_fh           fh;
 113
 114         /*
 115          * Various flags
 116          */
 117         unsigned long           flags;                  /* atomic bit ops */
 118         unsigned long           cache_validity;         /* bit mask */
 119
 120         /*
 121          * read_cache_jiffies is when we started read-caching this inode,
 122          * and read_cache_mtime is the mtime of the inode at that time.
 123          * attrtimeo is for how long the cached information is assumed
 124          * to be valid. A successful attribute revalidation doubles
 125          * attrtimeo (up to acregmax/acdirmax), a failure resets it to
 126          * acregmin/acdirmin.
 127          *
 128          * We need to revalidate the cached attrs for this inode if
 129          *
 130          *      jiffies - read_cache_jiffies > attrtimeo
 131          *
 132          * and invalidate any cached data/flush out any dirty pages if
 133          * we find that
 134          *
 135          *      mtime != read_cache_mtime
 136          */
 137         unsigned long           read_cache_jiffies;
 138         unsigned long           attrtimeo;
 139         unsigned long           attrtimeo_timestamp;
 140         __u64                   change_attr;            /* v4 only */
 141
 142         unsigned long           last_updated;
 143         /* "Generation counter" for the attribute cache. This is
 144          * bumped whenever we update the metadata on the
 145          * server.
 146          */
 147         unsigned long           cache_change_attribute;
 148         /*
 149          * Counter indicating the number of outstanding requests that
 150          * will cause a file data update.
 151          */
 152         atomic_t                data_updates;
 153
 154         struct nfs_access_entry cache_access;
 155 #ifdef CONFIG_NFS_V3_ACL
 156         struct posix_acl        *acl_access;
 157         struct posix_acl        *acl_default;
 158 #endif
 159
 160         /*
 161          * This is the cookie verifier used for NFSv3 readdir
 162          * operations
 163          */
 164         __u32                   cookieverf[2];
 165
 166         /*
 167          * This is the list of dirty unwritten pages.
 168          */
 169         spinlock_t              req_lock;
 170         struct list_head        dirty;
 171         struct list_head        commit;
 172         struct radix_tree_root  nfs_page_tree;
 173
 174         unsigned int            ndirty,
 175                                 ncommit,
 176                                 npages;
 177
 178         /* Open contexts for shared mmap writes */
 179         struct list_head        open_files;
 180
 181 #ifdef CONFIG_NFS_V4
 182         struct nfs4_cached_acl  *nfs4_acl;
 183         /* NFSv4 state */
 184         struct list_head        open_states;
 185         struct nfs_delegation   *delegation;
 186         int                      delegation_state;
 187         struct rw_semaphore     rwsem;
 188 #endif /* CONFIG_NFS_V4*/
 189         struct inode            vfs_inode;
 190 };
 191
 192 /*
 193  * Cache validity bit flags
 194  */
 195 #define NFS_INO_INVALID_ATTR    0x0001          /* cached attrs are invalid */
 196 #define NFS_INO_INVALID_DATA    0x0002          /* cached data is invalid */
 197 #define NFS_INO_INVALID_ATIME   0x0004          /* cached atime is invalid */
 198 #define NFS_INO_INVALID_ACCESS  0x0008          /* cached access cred invalid */
 199 #define NFS_INO_INVALID_ACL     0x0010          /* cached acls are invalid */
 200 #define NFS_INO_REVAL_PAGECACHE 0x0020          /* must revalidate pagecache */
 201
 202 /*
 203  * Bit offsets in flags field
 204  */
 205 #define NFS_INO_REVALIDATING    (0)             /* revalidating attrs */
 206 #define NFS_INO_ADVISE_RDPLUS   (1)             /* advise readdirplus */
 207 #define NFS_INO_STALE           (2)             /* possible stale inode */
 208
 209 static inline struct nfs_inode *NFS_I(struct inode *inode)
 210 {
 211         return container_of(inode, struct nfs_inode, vfs_inode);
 212 }
 213 #define NFS_SB(s)               ((struct nfs_server *)(s->s_fs_info))
 214
 215 #define NFS_FH(inode)                   (&NFS_I(inode)->fh)
 216 #define NFS_SERVER(inode)               (NFS_SB(inode->i_sb))
 217 #define NFS_CLIENT(inode)               (NFS_SERVER(inode)->client)
 218 #define NFS_PROTO(inode)                (NFS_SERVER(inode)->rpc_ops)
 219 #define NFS_ADDR(inode)                 (RPC_PEERADDR(NFS_CLIENT(inode)))
 220 #define NFS_COOKIEVERF(inode)           (NFS_I(inode)->cookieverf)
 221 #define NFS_READTIME(inode)             (NFS_I(inode)->read_cache_jiffies)
 222 #define NFS_CHANGE_ATTR(inode)          (NFS_I(inode)->change_attr)
 223 #define NFS_ATTRTIMEO(inode)            (NFS_I(inode)->attrtimeo)
 224 #define NFS_MINATTRTIMEO(inode) \
 225         (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmin \
 226                                : NFS_SERVER(inode)->acregmin)
 227 #define NFS_MAXATTRTIMEO(inode) \
 228         (S_ISDIR(inode->i_mode)? NFS_SERVER(inode)->acdirmax \
 229                                : NFS_SERVER(inode)->acregmax)
 230 #define NFS_ATTRTIMEO_UPDATE(inode)     (NFS_I(inode)->attrtimeo_timestamp)
 231
 232 #define NFS_FLAGS(inode)                (NFS_I(inode)->flags)
 233 #define NFS_STALE(inode)                (test_bit(NFS_INO_STALE, &NFS_FLAGS(inode)))
 234
 235 #define NFS_FILEID(inode)               (NFS_I(inode)->fileid)
 236
 237 static inline int nfs_caches_unstable(struct inode *inode)
 238 {
 239         return atomic_read(&NFS_I(inode)->data_updates) != 0;
 240 }
 241
 242 static inline void nfs_mark_for_revalidate(struct inode *inode)
 243 {
 244         spin_lock(&inode->i_lock);
 245         NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
 246         spin_unlock(&inode->i_lock);
 247 }
 248
 249 static inline void NFS_CACHEINV(struct inode *inode)
 250 {
 251         if (!nfs_caches_unstable(inode))
 252                 nfs_mark_for_revalidate(inode);
 253 }
 254
 255 static inline int nfs_server_capable(struct inode *inode, int cap)
 256 {
 257         return NFS_SERVER(inode)->caps & cap;
 258 }
 259
 260 static inline int NFS_USE_READDIRPLUS(struct inode *inode)
 261 {
 262         return test_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
 263 }
 264
 265 /**
 266  * nfs_save_change_attribute - Returns the inode attribute change cookie
 267  * @inode - pointer to inode
 268  * The "change attribute" is updated every time we finish an operation
 269  * that will result in a metadata change on the server.
 270  */
 271 static inline long nfs_save_change_attribute(struct inode *inode)
 272 {
 273         return NFS_I(inode)->cache_change_attribute;
 274 }
 275
 276 /**
 277  * nfs_verify_change_attribute - Detects NFS inode cache updates
 278  * @inode - pointer to inode
 279  * @chattr - previously saved change attribute
 280  * Return "false" if metadata has been updated (or is in the process of
 281  * being updated) since the change attribute was saved.
 282  */
 283 static inline int nfs_verify_change_attribute(struct inode *inode, unsigned long chattr)
 284 {
 285         return !nfs_caches_unstable(inode)
 286                 && time_after_eq(chattr, NFS_I(inode)->cache_change_attribute);
 287 }
 288
 289 /*
 290  * linux/fs/nfs/inode.c
 291  */
 292 extern int nfs_sync_mapping(struct address_space *mapping);
 293 extern void nfs_zap_caches(struct inode *);
 294 extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
 295                                 struct nfs_fattr *);
 296 extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
 297 extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
 298 extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 299 extern int nfs_permission(struct inode *, int, struct nameidata *);
 300 extern int nfs_access_get_cached(struct inode *, struct rpc_cred *, struct nfs_access_entry *);
 301 extern void nfs_access_add_cache(struct inode *, struct nfs_access_entry *);
 302 extern int nfs_open(struct inode *, struct file *);
 303 extern int nfs_release(struct inode *, struct file *);
 304 extern int nfs_attribute_timeout(struct inode *inode);
 305 extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
 306 extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
 307 extern void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
 308 extern int nfs_setattr(struct dentry *, struct iattr *);
 309 extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
 310 extern void nfs_begin_attr_update(struct inode *);
 311 extern void nfs_end_attr_update(struct inode *);
 312 extern void nfs_begin_data_update(struct inode *);
 313 extern void nfs_end_data_update(struct inode *);
 314 extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred);
 315 extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
 316 extern void put_nfs_open_context(struct nfs_open_context *ctx);
 317 extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
 318 extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode);
 319 extern void nfs_file_clear_open_context(struct file *filp);
 320
 321 /* linux/net/ipv4/ipconfig.c: trims ip addr off front of name, too. */
 322 extern u32 root_nfs_parse_addr(char *name); /*__init*/
 323
 324 static inline void nfs_fattr_init(struct nfs_fattr *fattr)
 325 {
 326         fattr->valid = 0;
 327         fattr->time_start = jiffies;
 328 }
 329
 330 /*
 331  * linux/fs/nfs/file.c
 332  */
 333 extern struct inode_operations nfs_file_inode_operations;
 334 #ifdef CONFIG_NFS_V3
 335 extern struct inode_operations nfs3_file_inode_operations;
 336 #endif /* CONFIG_NFS_V3 */
 337 extern struct file_operations nfs_file_operations;
 338 extern struct address_space_operations nfs_file_aops;
 339
 340 static inline struct rpc_cred *nfs_file_cred(struct file *file)
 341 {
 342         if (file != NULL) {
 343                 struct nfs_open_context *ctx;
 344
 345                 ctx = (struct nfs_open_context*)file->private_data;
 346                 return ctx->cred;
 347         }
 348         return NULL;
 349 }
 350
 351 /*
 352  * linux/fs/nfs/xattr.c
 353  */
 354 #ifdef CONFIG_NFS_V3_ACL
 355 extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
 356 extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
 357 extern int nfs3_setxattr(struct dentry *, const char *,
 358                         const void *, size_t, int);
 359 extern int nfs3_removexattr (struct dentry *, const char *name);
 360 #else
 361 # define nfs3_listxattr NULL
 362 # define nfs3_getxattr NULL
 363 # define nfs3_setxattr NULL
 364 # define nfs3_removexattr NULL
 365 #endif
 366
 367 /*
 368  * linux/fs/nfs/direct.c
 369  */
 370 extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
 371                         unsigned long);
 372 extern ssize_t nfs_file_direct_read(struct kiocb *iocb, char __user *buf,
 373                         size_t count, loff_t pos);
 374 extern ssize_t nfs_file_direct_write(struct kiocb *iocb, const char __user *buf,
 375                         size_t count, loff_t pos);
 376
 377 /*
 378  * linux/fs/nfs/dir.c
 379  */
 380 extern struct inode_operations nfs_dir_inode_operations;
 381 #ifdef CONFIG_NFS_V3
 382 extern struct inode_operations nfs3_dir_inode_operations;
 383 #endif /* CONFIG_NFS_V3 */
 384 extern struct file_operations nfs_dir_operations;
 385 extern struct dentry_operations nfs_dentry_operations;
 386
 387 extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
 388
 389 /*
 390  * linux/fs/nfs/symlink.c
 391  */
 392 extern struct inode_operations nfs_symlink_inode_operations;
 393
 394 /*
 395  * linux/fs/nfs/sysctl.c
 396  */
 397 #ifdef CONFIG_SYSCTL
 398 extern int nfs_register_sysctl(void);
 399 extern void nfs_unregister_sysctl(void);
 400 #else
 401 #define nfs_register_sysctl() 0
 402 #define nfs_unregister_sysctl() do { } while(0)
 403 #endif
 404
 405 /*
 406  * linux/fs/nfs/unlink.c
 407  */
 408 extern int  nfs_async_unlink(struct dentry *);
 409 extern void nfs_complete_unlink(struct dentry *);
 410
 411 /*
 412  * linux/fs/nfs/write.c
 413  */
 414 extern int  nfs_writepage(struct page *page, struct writeback_control *wbc);
 415 extern int  nfs_writepages(struct address_space *, struct writeback_control *);
 416 extern int  nfs_flush_incompatible(struct file *file, struct page *page);
 417 extern int  nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
 418 extern void nfs_writeback_done(struct rpc_task *task, void *data);
 419 extern void nfs_writedata_release(void *data);
 420
 421 #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
 422 extern void nfs_commit_done(struct rpc_task *, void *data);
 423 extern void nfs_commit_release(void *data);
 424 #endif
 425
 426 /*
 427  * Try to write back everything synchronously (but check the
 428  * return value!)
 429  */
 430 extern int  nfs_sync_inode(struct inode *, unsigned long, unsigned int, int);
 431 #if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
 432 extern int  nfs_commit_inode(struct inode *, int);
 433 #else
 434 static inline int
 435 nfs_commit_inode(struct inode *inode, int how)
 436 {
 437         return 0;
 438 }
 439 #endif
 440
 441 static inline int
 442 nfs_have_writebacks(struct inode *inode)
 443 {
 444         return NFS_I(inode)->npages != 0;
 445 }
 446
 447 static inline int
 448 nfs_wb_all(struct inode *inode)
 449 {
 450         int error = nfs_sync_inode(inode, 0, 0, FLUSH_WAIT);
 451         return (error < 0) ? error : 0;
 452 }
 453
 454 /*
 455  * Write back all requests on one page - we do this before reading it.
 456  */
 457 static inline int nfs_wb_page_priority(struct inode *inode, struct page* page, int how)
 458 {
 459         int error = nfs_sync_inode(inode, page->index, 1,
 460                         how | FLUSH_WAIT | FLUSH_STABLE);
 461         return (error < 0) ? error : 0;
 462 }
 463
 464 static inline int nfs_wb_page(struct inode *inode, struct page* page)
 465 {
 466         return nfs_wb_page_priority(inode, page, 0);
 467 }
 468
 469 /*
 470  * Allocate and free nfs_write_data structures
 471  */
 472 extern mempool_t *nfs_wdata_mempool;
 473
 474 static inline struct nfs_write_data *nfs_writedata_alloc(unsigned int pagecount)
 475 {
 476         struct nfs_write_data *p = mempool_alloc(nfs_wdata_mempool, SLAB_NOFS);
 477
 478         if (p) {
 479                 memset(p, 0, sizeof(*p));
 480                 INIT_LIST_HEAD(&p->pages);
 481                 if (pagecount < NFS_PAGEVEC_SIZE)
 482                         p->pagevec = &p->page_array[0];
 483                 else {
 484                         size_t size = ++pagecount * sizeof(struct page *);
 485                         p->pagevec = kmalloc(size, GFP_NOFS);
 486                         if (p->pagevec) {
 487                                 memset(p->pagevec, 0, size);
 488                         } else {
 489                                 mempool_free(p, nfs_wdata_mempool);
 490                                 p = NULL;
 491                         }
 492                 }
 493         }
 494         return p;
 495 }
 496
 497 static inline void nfs_writedata_free(struct nfs_write_data *p)
 498 {
 499         if (p && (p->pagevec != &p->page_array[0]))
 500                 kfree(p->pagevec);
 501         mempool_free(p, nfs_wdata_mempool);
 502 }
 503
 504 /*
 505  * linux/fs/nfs/read.c
 506  */
 507 extern int  nfs_readpage(struct file *, struct page *);
 508 extern int  nfs_readpages(struct file *, struct address_space *,
 509                 struct list_head *, unsigned);
 510 extern void nfs_readpage_result(struct rpc_task *, void *);
 511 extern void  nfs_readdata_release(void *data);
 512
 513
 514 /*
 515  * Allocate and free nfs_read_data structures
 516  */
 517 extern mempool_t *nfs_rdata_mempool;
 518
 519 static inline struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
 520 {
 521         struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS);
 522
 523         if (p) {
 524                 memset(p, 0, sizeof(*p));
 525                 INIT_LIST_HEAD(&p->pages);
 526                 if (pagecount < NFS_PAGEVEC_SIZE)
 527                         p->pagevec = &p->page_array[0];
 528                 else {
 529                         size_t size = ++pagecount * sizeof(struct page *);
 530                         p->pagevec = kmalloc(size, GFP_NOFS);
 531                         if (p->pagevec) {
 532                                 memset(p->pagevec, 0, size);
 533                         } else {
 534                                 mempool_free(p, nfs_rdata_mempool);
 535                                 p = NULL;
 536                         }
 537                 }
 538         }
 539         return p;
 540 }
 541
 542 static inline void nfs_readdata_free(struct nfs_read_data *p)
 543 {
 544         if (p && (p->pagevec != &p->page_array[0]))
 545                 kfree(p->pagevec);
 546         mempool_free(p, nfs_rdata_mempool);
 547 }
 548
 549 /*
 550  * linux/fs/nfs3proc.c
 551  */
 552 #ifdef CONFIG_NFS_V3_ACL
 553 extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
 554 extern int nfs3_proc_setacl(struct inode *inode, int type,
 555                             struct posix_acl *acl);
 556 extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
 557                 mode_t mode);
 558 extern void nfs3_forget_cached_acls(struct inode *inode);
 559 #else
 560 static inline int nfs3_proc_set_default_acl(struct inode *dir,
 561                                             struct inode *inode,
 562                                             mode_t mode)
 563 {
 564         return 0;
 565 }
 566
 567 static inline void nfs3_forget_cached_acls(struct inode *inode)
 568 {
 569 }
 570 #endif /* CONFIG_NFS_V3_ACL */
 571
 572 /*
 573  * linux/fs/mount_clnt.c
 574  * (Used only by nfsroot module)
 575  */
 576 extern int  nfsroot_mount(struct sockaddr_in *, char *, struct nfs_fh *,
 577                 int, int);
 578
 579 /*
 580  * inline functions
 581  */
 582
 583 static inline loff_t
 584 nfs_size_to_loff_t(__u64 size)
 585 {
 586         loff_t maxsz = (((loff_t) ULONG_MAX) << PAGE_CACHE_SHIFT) + PAGE_CACHE_SIZE - 1;
 587         if (size > maxsz)
 588                 return maxsz;
 589         return (loff_t) size;
 590 }
 591
 592 static inline ino_t
 593 nfs_fileid_to_ino_t(u64 fileid)
 594 {
 595         ino_t ino = (ino_t) fileid;
 596         if (sizeof(ino_t) < sizeof(u64))
 597                 ino ^= fileid >> (sizeof(u64)-sizeof(ino_t)) * 8;
 598         return ino;
 599 }
 600
 601 /* NFS root */
 602
 603 extern void * nfs_root_data(void);
 604
 605 #define nfs_wait_event(clnt, wq, condition)                             \
 606 ({                                                                      \
 607         int __retval = 0;                                               \
 608         if (clnt->cl_intr) {                                            \
 609                 sigset_t oldmask;                                       \
 610                 rpc_clnt_sigmask(clnt, &oldmask);                       \
 611                 __retval = wait_event_interruptible(wq, condition);     \
 612                 rpc_clnt_sigunmask(clnt, &oldmask);                     \
 613         } else                                                          \
 614                 wait_event(wq, condition);                              \
 615         __retval;                                                       \
 616 })
 617
 618 #define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
 619
 620 #endif /* __KERNEL__ */
 621
 622 /*
 623  * NFS debug flags
 624  */
 625 #define NFSDBG_VFS              0x0001
 626 #define NFSDBG_DIRCACHE         0x0002
 627 #define NFSDBG_LOOKUPCACHE      0x0004
 628 #define NFSDBG_PAGECACHE        0x0008
 629 #define NFSDBG_PROC             0x0010
 630 #define NFSDBG_XDR              0x0020
 631 #define NFSDBG_FILE             0x0040
 632 #define NFSDBG_ROOT             0x0080
 633 #define NFSDBG_CALLBACK         0x0100
 634 #define NFSDBG_ALL              0xFFFF
 635
 636 #ifdef __KERNEL__
 637 # undef ifdebug
 638 # ifdef NFS_DEBUG
 639 #  define ifdebug(fac)          if (unlikely(nfs_debug & NFSDBG_##fac))
 640 # else
 641 #  define ifdebug(fac)          if (0)
 642 # endif
 643 #endif /* __KERNEL */
 644
 645 #endif