linux/include/linux/nfs_fs.h
<<
>>
Prefs
   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 */
  76struct 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
  84struct 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
  92struct nfs4_state;
  93struct 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
 108struct 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 */
 119struct nfs_delegation;
 120
 121struct posix_acl;
 122
 123/*
 124 * nfs fs inode data in memory
 125 */
 126struct 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
 238static inline struct nfs_inode *NFS_I(const struct inode *inode)
 239{
 240        return container_of(inode, struct nfs_inode, vfs_inode);
 241}
 242
 243static inline struct nfs_server *NFS_SB(const struct super_block *s)
 244{
 245        return (struct nfs_server *)(s->s_fs_info);
 246}
 247
 248static inline struct nfs_fh *NFS_FH(const struct inode *inode)
 249{
 250        return &NFS_I(inode)->fh;
 251}
 252
 253static inline struct nfs_server *NFS_SERVER(const struct inode *inode)
 254{
 255        return NFS_SB(inode->i_sb);
 256}
 257
 258static inline struct rpc_clnt *NFS_CLIENT(const struct inode *inode)
 259{
 260        return NFS_SERVER(inode)->client;
 261}
 262
 263static inline const struct nfs_rpc_ops *NFS_PROTO(const struct inode *inode)
 264{
 265        return NFS_SERVER(inode)->nfs_client->rpc_ops;
 266}
 267
 268static 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
 274static 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
 280static inline int NFS_STALE(const struct inode *inode)
 281{
 282        return test_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
 283}
 284
 285static inline int NFS_FSCACHE(const struct inode *inode)
 286{
 287        return test_bit(NFS_INO_FSCACHE, &NFS_I(inode)->flags);
 288}
 289
 290static inline __u64 NFS_FILEID(const struct inode *inode)
 291{
 292        return NFS_I(inode)->fileid;
 293}
 294
 295static inline void set_nfs_fileid(struct inode *inode, __u64 fileid)
 296{
 297        NFS_I(inode)->fileid = fileid;
 298}
 299
 300static 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
 311static inline int nfs_server_capable(struct inode *inode, int cap)
 312{
 313        return NFS_SERVER(inode)->caps & cap;
 314}
 315
 316static 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 */
 327static 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 */
 340static 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 */
 348extern int nfs_sync_mapping(struct address_space *mapping);
 349extern void nfs_zap_mapping(struct inode *inode, struct address_space *mapping);
 350extern void nfs_zap_caches(struct inode *);
 351extern void nfs_invalidate_atime(struct inode *);
 352extern struct inode *nfs_fhget(struct super_block *, struct nfs_fh *,
 353                                struct nfs_fattr *);
 354extern int nfs_refresh_inode(struct inode *, struct nfs_fattr *);
 355extern int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr);
 356extern int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr);
 357extern int nfs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
 358extern int nfs_permission(struct inode *, int);
 359extern int nfs_open(struct inode *, struct file *);
 360extern int nfs_release(struct inode *, struct file *);
 361extern int nfs_attribute_timeout(struct inode *inode);
 362extern int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode);
 363extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *);
 364extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping);
 365extern int nfs_setattr(struct dentry *, struct iattr *);
 366extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr);
 367extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx);
 368extern void put_nfs_open_context(struct nfs_open_context *ctx);
 369extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode);
 370extern struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode);
 371extern void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx);
 372extern struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx);
 373extern void nfs_put_lock_context(struct nfs_lock_context *l_ctx);
 374extern u64 nfs_compat_user_ino64(u64 fileid);
 375extern void nfs_fattr_init(struct nfs_fattr *fattr);
 376extern unsigned long nfs_inc_attr_generation_counter(void);
 377
 378extern struct nfs_fattr *nfs_alloc_fattr(void);
 379
 380static inline void nfs_free_fattr(const struct nfs_fattr *fattr)
 381{
 382        kfree(fattr);
 383}
 384
 385extern struct nfs_fh *nfs_alloc_fhandle(void);
 386
 387static inline void nfs_free_fhandle(const struct nfs_fh *fh)
 388{
 389        kfree(fh);
 390}
 391
 392#ifdef NFS_DEBUG
 393extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
 394static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
 395{
 396        return _nfs_display_fhandle_hash(fh);
 397}
 398extern 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
 405static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
 406{
 407        return 0;
 408}
 409static 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 */
 418extern 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. */
 420extern __be32 root_nfs_parse_addr(char *name); /*__init*/
 421
 422/*
 423 * linux/fs/nfs/file.c
 424 */
 425extern const struct file_operations nfs_file_operations;
 426#if IS_ENABLED(CONFIG_NFS_V4)
 427extern const struct file_operations nfs4_file_operations;
 428#endif /* CONFIG_NFS_V4 */
 429extern const struct address_space_operations nfs_file_aops;
 430extern const struct address_space_operations nfs_dir_aops;
 431
 432static inline struct nfs_open_context *nfs_file_open_context(struct file *filp)
 433{
 434        return filp->private_data;
 435}
 436
 437static 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
 452extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
 453extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
 454extern int nfs3_setxattr(struct dentry *, const char *,
 455                        const void *, size_t, int);
 456extern 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 */
 467extern ssize_t nfs_direct_IO(int, struct kiocb *, const struct iovec *, loff_t,
 468                        unsigned long);
 469extern ssize_t nfs_file_direct_read(struct kiocb *iocb,
 470                        const struct iovec *iov, unsigned long nr_segs,
 471                        loff_t pos, bool uio);
 472extern 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 */
 479extern const struct file_operations nfs_dir_operations;
 480extern const struct dentry_operations nfs_dentry_operations;
 481
 482extern void nfs_force_lookup_revalidate(struct inode *dir);
 483extern int nfs_instantiate(struct dentry *dentry, struct nfs_fh *fh, struct nfs_fattr *fattr);
 484extern int nfs_may_open(struct inode *inode, struct rpc_cred *cred, int openflags);
 485extern void nfs_access_zap_cache(struct inode *inode);
 486
 487/*
 488 * linux/fs/nfs/symlink.c
 489 */
 490extern const struct inode_operations nfs_symlink_inode_operations;
 491
 492/*
 493 * linux/fs/nfs/sysctl.c
 494 */
 495#ifdef CONFIG_SYSCTL
 496extern int nfs_register_sysctl(void);
 497extern 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 */
 506extern const struct inode_operations nfs_mountpoint_inode_operations;
 507extern const struct inode_operations nfs_referral_inode_operations;
 508extern int nfs_mountpoint_expiry_timeout;
 509extern void nfs_release_automount_timer(void);
 510
 511/*
 512 * linux/fs/nfs/unlink.c
 513 */
 514extern void nfs_complete_unlink(struct dentry *dentry, struct inode *);
 515extern void nfs_block_sillyrename(struct dentry *dentry);
 516extern void nfs_unblock_sillyrename(struct dentry *dentry);
 517extern int  nfs_sillyrename(struct inode *dir, struct dentry *dentry);
 518
 519/*
 520 * linux/fs/nfs/write.c
 521 */
 522extern int  nfs_congestion_kb;
 523extern int  nfs_writepage(struct page *page, struct writeback_control *wbc);
 524extern int  nfs_writepages(struct address_space *, struct writeback_control *);
 525extern int  nfs_flush_incompatible(struct file *file, struct page *page);
 526extern int  nfs_updatepage(struct file *, struct page *, unsigned int, unsigned int);
 527extern 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 */
 533extern int nfs_wb_all(struct inode *inode);
 534extern int nfs_wb_page(struct inode *inode, struct page* page);
 535extern int nfs_wb_page_cancel(struct inode *inode, struct page* page);
 536#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)
 537extern int  nfs_commit_inode(struct inode *, int);
 538extern struct nfs_commit_data *nfs_commitdata_alloc(void);
 539extern void nfs_commit_free(struct nfs_commit_data *data);
 540#else
 541static inline int
 542nfs_commit_inode(struct inode *inode, int how)
 543{
 544        return 0;
 545}
 546#endif
 547
 548static inline int
 549nfs_have_writebacks(struct inode *inode)
 550{
 551        return NFS_I(inode)->npages != 0;
 552}
 553
 554/*
 555 * linux/fs/nfs/read.c
 556 */
 557extern int  nfs_readpage(struct file *, struct page *);
 558extern int  nfs_readpages(struct file *, struct address_space *,
 559                struct list_head *, unsigned);
 560extern int  nfs_readpage_result(struct rpc_task *, struct nfs_read_data *);
 561extern 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
 568extern struct posix_acl *nfs3_proc_getacl(struct inode *inode, int type);
 569extern int nfs3_proc_setacl(struct inode *inode, int type,
 570                            struct posix_acl *acl);
 571extern int nfs3_proc_set_default_acl(struct inode *dir, struct inode *inode,
 572                umode_t mode);
 573extern void nfs3_forget_cached_acls(struct inode *inode);
 574#else
 575static inline int nfs3_proc_set_default_acl(struct inode *dir,
 576                                            struct inode *inode,
 577                                            umode_t mode)
 578{
 579        return 0;
 580}
 581
 582static inline void nfs3_forget_cached_acls(struct inode *inode)
 583{
 584}
 585#endif /* CONFIG_NFS_V3_ACL */
 586
 587/*
 588 * inline functions
 589 */
 590
 591static 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
 598static inline ino_t
 599nfs_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
 644
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.