include/linux/nfs_xdr.h

   1 #ifndef _LINUX_NFS_XDR_H
   2 #define _LINUX_NFS_XDR_H
   3
   4 #include <linux/sunrpc/xprt.h>
   5
   6 struct nfs4_fsid {
   7         __u64 major;
   8         __u64 minor;
   9 };
  10
  11 struct nfs_fattr {
  12         unsigned short          valid;          /* which fields are valid */
  13         __u64                   pre_size;       /* pre_op_attr.size       */
  14         struct timespec         pre_mtime;      /* pre_op_attr.mtime      */
  15         struct timespec         pre_ctime;      /* pre_op_attr.ctime      */
  16         enum nfs_ftype          type;           /* always use NFSv2 types */
  17         __u32                   mode;
  18         __u32                   nlink;
  19         __u32                   uid;
  20         __u32                   gid;
  21         __u64                   size;
  22         union {
  23                 struct {
  24                         __u32   blocksize;
  25                         __u32   blocks;
  26                 } nfs2;
  27                 struct {
  28                         __u64   used;
  29                 } nfs3;
  30         } du;
  31         dev_t                   rdev;
  32         union {
  33                 __u64           nfs3;           /* also nfs2 */
  34                 struct nfs4_fsid nfs4;
  35         } fsid_u;
  36         __u64                   fileid;
  37         struct timespec         atime;
  38         struct timespec         mtime;
  39         struct timespec         ctime;
  40         __u32                   bitmap[2];      /* NFSv4 returned attribute bitmap */
  41         __u64                   change_attr;    /* NFSv4 change attribute */
  42         __u64                   pre_change_attr;/* pre-op NFSv4 change attribute */
  43         unsigned long           timestamp;
  44 };
  45
  46 #define NFS_ATTR_WCC            0x0001          /* pre-op WCC data    */
  47 #define NFS_ATTR_FATTR          0x0002          /* post-op attributes */
  48 #define NFS_ATTR_FATTR_V3       0x0004          /* NFSv3 attributes */
  49 #define NFS_ATTR_FATTR_V4       0x0008
  50 #define NFS_ATTR_PRE_CHANGE     0x0010
  51
  52 /*
  53  * Info on the file system
  54  */
  55 struct nfs_fsinfo {
  56         struct nfs_fattr        *fattr; /* Post-op attributes */
  57         __u32                   rtmax;  /* max.  read transfer size */
  58         __u32                   rtpref; /* pref. read transfer size */
  59         __u32                   rtmult; /* reads should be multiple of this */
  60         __u32                   wtmax;  /* max.  write transfer size */
  61         __u32                   wtpref; /* pref. write transfer size */
  62         __u32                   wtmult; /* writes should be multiple of this */
  63         __u32                   dtpref; /* pref. readdir transfer size */
  64         __u64                   maxfilesize;
  65         __u32                   lease_time; /* in seconds */
  66 };
  67
  68 struct nfs_fsstat {
  69         struct nfs_fattr        *fattr; /* Post-op attributes */
  70         __u64                   tbytes; /* total size in bytes */
  71         __u64                   fbytes; /* # of free bytes */
  72         __u64                   abytes; /* # of bytes available to user */
  73         __u64                   tfiles; /* # of files */
  74         __u64                   ffiles; /* # of free files */
  75         __u64                   afiles; /* # of files available to user */
  76 };
  77
  78 struct nfs2_fsstat {
  79         __u32                   tsize;  /* Server transfer size */
  80         __u32                   bsize;  /* Filesystem block size */
  81         __u32                   blocks; /* No. of "bsize" blocks on filesystem */
  82         __u32                   bfree;  /* No. of free "bsize" blocks */
  83         __u32                   bavail; /* No. of available "bsize" blocks */
  84 };
  85
  86 struct nfs_pathconf {
  87         struct nfs_fattr        *fattr; /* Post-op attributes */
  88         __u32                   max_link; /* max # of hard links */
  89         __u32                   max_namelen; /* max name length */
  90 };
  91
  92 struct nfs4_change_info {
  93         u32                     atomic;
  94         u64                     before;
  95         u64                     after;
  96 };
  97
  98 /*
  99  * Arguments to the open call.
 100  */
 101 struct nfs_openargs {
 102         const struct nfs_fh *   fh;
 103         __u32                   seqid;
 104         int                     open_flags;
 105         __u64                   clientid;
 106         __u32                   id;
 107         union {
 108                 struct iattr *  attrs;    /* UNCHECKED, GUARDED */
 109                 nfs4_verifier   verifier; /* EXCLUSIVE */
 110                 nfs4_stateid    delegation;             /* CLAIM_DELEGATE_CUR */
 111                 int             delegation_type;        /* CLAIM_PREVIOUS */
 112         } u;
 113         const struct qstr *     name;
 114         const struct nfs_server *server;         /* Needed for ID mapping */
 115         const u32 *             bitmask;
 116         __u32                   claim;
 117 };
 118
 119 struct nfs_openres {
 120         nfs4_stateid            stateid;
 121         struct nfs_fh           fh;
 122         struct nfs4_change_info cinfo;
 123         __u32                   rflags;
 124         struct nfs_fattr *      f_attr;
 125         const struct nfs_server *server;
 126         int                     delegation_type;
 127         nfs4_stateid            delegation;
 128         __u32                   do_recall;
 129         __u64                   maxsize;
 130 };
 131
 132 /*
 133  * Arguments to the open_confirm call.
 134  */
 135 struct nfs_open_confirmargs {
 136         const struct nfs_fh *   fh;
 137         nfs4_stateid            stateid;
 138         __u32                   seqid;
 139 };
 140
 141 struct nfs_open_confirmres {
 142         nfs4_stateid            stateid;
 143 };
 144
 145 /*
 146  * Arguments to the close call.
 147  */
 148 struct nfs_closeargs {
 149         struct nfs_fh *         fh;
 150         nfs4_stateid            stateid;
 151         __u32                   seqid;
 152         int                     open_flags;
 153 };
 154
 155 struct nfs_closeres {
 156         nfs4_stateid            stateid;
 157 };
 158 /*
 159  *  * Arguments to the lock,lockt, and locku call.
 160  *   */
 161 struct nfs_lowner {
 162         __u64           clientid;
 163         u32                     id;
 164 };
 165
 166 struct nfs_open_to_lock {
 167         __u32                   open_seqid;
 168         nfs4_stateid            open_stateid;
 169         __u32                   lock_seqid;
 170         struct nfs_lowner       lock_owner;
 171 };
 172
 173 struct nfs_exist_lock {
 174         nfs4_stateid            stateid;
 175         __u32                   seqid;
 176 };
 177
 178 struct nfs_lock_opargs {
 179         __u32                   reclaim;
 180         __u32                   new_lock_owner;
 181         union {
 182                 struct nfs_open_to_lock *open_lock;
 183                 struct nfs_exist_lock   *exist_lock;
 184         } u;
 185 };
 186
 187 struct nfs_locku_opargs {
 188         __u32                   seqid;
 189         nfs4_stateid            stateid;
 190 };
 191
 192 struct nfs_lockargs {
 193         struct nfs_fh *         fh;
 194         __u32                   type;
 195         __u64                   offset;
 196         __u64                   length;
 197         union {
 198                 struct nfs_lock_opargs  *lock;    /* LOCK  */
 199                 struct nfs_lowner       *lockt;  /* LOCKT */
 200                 struct nfs_locku_opargs *locku;  /* LOCKU */
 201         } u;
 202 };
 203
 204 struct nfs_lock_denied {
 205         __u64                   offset;
 206         __u64                   length;
 207         __u32                   type;
 208         struct nfs_lowner       owner;
 209 };
 210
 211 struct nfs_lockres {
 212         union {
 213                 nfs4_stateid            stateid;/* LOCK success, LOCKU */
 214                 struct nfs_lock_denied  denied; /* LOCK failed, LOCKT success */
 215         } u;
 216         const struct nfs_server *       server;
 217 };
 218
 219 struct nfs4_delegreturnargs {
 220         const struct nfs_fh *fhandle;
 221         const nfs4_stateid *stateid;
 222 };
 223
 224 /*
 225  * Arguments to the read call.
 226  */
 227
 228 #define NFS_READ_MAXIOV         (9U)
 229 #if (NFS_READ_MAXIOV > (MAX_IOVEC -2))
 230 #error "NFS_READ_MAXIOV is too large"
 231 #endif
 232
 233 struct nfs_readargs {
 234         struct nfs_fh *         fh;
 235         struct nfs_open_context *context;
 236         __u64                   offset;
 237         __u32                   count;
 238         unsigned int            pgbase;
 239         struct page **          pages;
 240 };
 241
 242 struct nfs_readres {
 243         struct nfs_fattr *      fattr;
 244         __u32                   count;
 245         int                     eof;
 246 };
 247
 248 /*
 249  * Arguments to the write call.
 250  */
 251 #define NFS_WRITE_MAXIOV        (9U)
 252 #if (NFS_WRITE_MAXIOV > (MAX_IOVEC -2))
 253 #error "NFS_WRITE_MAXIOV is too large"
 254 #endif
 255
 256 struct nfs_writeargs {
 257         struct nfs_fh *         fh;
 258         struct nfs_open_context *context;
 259         __u64                   offset;
 260         __u32                   count;
 261         enum nfs3_stable_how    stable;
 262         unsigned int            pgbase;
 263         struct page **          pages;
 264 };
 265
 266 struct nfs_writeverf {
 267         enum nfs3_stable_how    committed;
 268         __u32                   verifier[2];
 269 };
 270
 271 struct nfs_writeres {
 272         struct nfs_fattr *      fattr;
 273         struct nfs_writeverf *  verf;
 274         __u32                   count;
 275 };
 276
 277 /*
 278  * Argument struct for decode_entry function
 279  */
 280 struct nfs_entry {
 281         __u64                   ino;
 282         __u64                   cookie,
 283                                 prev_cookie;
 284         const char *            name;
 285         unsigned int            len;
 286         int                     eof;
 287         struct nfs_fh *         fh;
 288         struct nfs_fattr *      fattr;
 289 };
 290
 291 /*
 292  * The following types are for NFSv2 only.
 293  */
 294 struct nfs_sattrargs {
 295         struct nfs_fh *         fh;
 296         struct iattr *          sattr;
 297 };
 298
 299 struct nfs_diropargs {
 300         struct nfs_fh *         fh;
 301         const char *            name;
 302         unsigned int            len;
 303 };
 304
 305 struct nfs_createargs {
 306         struct nfs_fh *         fh;
 307         const char *            name;
 308         unsigned int            len;
 309         struct iattr *          sattr;
 310 };
 311
 312 struct nfs_renameargs {
 313         struct nfs_fh *         fromfh;
 314         const char *            fromname;
 315         unsigned int            fromlen;
 316         struct nfs_fh *         tofh;
 317         const char *            toname;
 318         unsigned int            tolen;
 319 };
 320
 321 struct nfs_setattrargs {
 322         struct nfs_fh *                 fh;
 323         nfs4_stateid                    stateid;
 324         struct iattr *                  iap;
 325         const struct nfs_server *       server; /* Needed for name mapping */
 326         const u32 *                     bitmask;
 327 };
 328
 329 struct nfs_setattrres {
 330         struct nfs_fattr *              fattr;
 331         const struct nfs_server *       server;
 332 };
 333
 334 struct nfs_linkargs {
 335         struct nfs_fh *         fromfh;
 336         struct nfs_fh *         tofh;
 337         const char *            toname;
 338         unsigned int            tolen;
 339 };
 340
 341 struct nfs_symlinkargs {
 342         struct nfs_fh *         fromfh;
 343         const char *            fromname;
 344         unsigned int            fromlen;
 345         const char *            topath;
 346         unsigned int            tolen;
 347         struct iattr *          sattr;
 348 };
 349
 350 struct nfs_readdirargs {
 351         struct nfs_fh *         fh;
 352         __u32                   cookie;
 353         unsigned int            count;
 354         struct page **          pages;
 355 };
 356
 357 struct nfs_diropok {
 358         struct nfs_fh *         fh;
 359         struct nfs_fattr *      fattr;
 360 };
 361
 362 struct nfs_readlinkargs {
 363         struct nfs_fh *         fh;
 364         unsigned int            pgbase;
 365         unsigned int            pglen;
 366         struct page **          pages;
 367 };
 368
 369 struct nfs3_sattrargs {
 370         struct nfs_fh *         fh;
 371         struct iattr *          sattr;
 372         unsigned int            guard;
 373         struct timespec         guardtime;
 374 };
 375
 376 struct nfs3_diropargs {
 377         struct nfs_fh *         fh;
 378         const char *            name;
 379         unsigned int            len;
 380 };
 381
 382 struct nfs3_accessargs {
 383         struct nfs_fh *         fh;
 384         __u32                   access;
 385 };
 386
 387 struct nfs3_createargs {
 388         struct nfs_fh *         fh;
 389         const char *            name;
 390         unsigned int            len;
 391         struct iattr *          sattr;
 392         enum nfs3_createmode    createmode;
 393         __u32                   verifier[2];
 394 };
 395
 396 struct nfs3_mkdirargs {
 397         struct nfs_fh *         fh;
 398         const char *            name;
 399         unsigned int            len;
 400         struct iattr *          sattr;
 401 };
 402
 403 struct nfs3_symlinkargs {
 404         struct nfs_fh *         fromfh;
 405         const char *            fromname;
 406         unsigned int            fromlen;
 407         const char *            topath;
 408         unsigned int            tolen;
 409         struct iattr *          sattr;
 410 };
 411
 412 struct nfs3_mknodargs {
 413         struct nfs_fh *         fh;
 414         const char *            name;
 415         unsigned int            len;
 416         enum nfs3_ftype         type;
 417         struct iattr *          sattr;
 418         dev_t                   rdev;
 419 };
 420
 421 struct nfs3_renameargs {
 422         struct nfs_fh *         fromfh;
 423         const char *            fromname;
 424         unsigned int            fromlen;
 425         struct nfs_fh *         tofh;
 426         const char *            toname;
 427         unsigned int            tolen;
 428 };
 429
 430 struct nfs3_linkargs {
 431         struct nfs_fh *         fromfh;
 432         struct nfs_fh *         tofh;
 433         const char *            toname;
 434         unsigned int            tolen;
 435 };
 436
 437 struct nfs3_readdirargs {
 438         struct nfs_fh *         fh;
 439         __u64                   cookie;
 440         __u32                   verf[2];
 441         int                     plus;
 442         unsigned int            count;
 443         struct page **          pages;
 444 };
 445
 446 struct nfs3_diropres {
 447         struct nfs_fattr *      dir_attr;
 448         struct nfs_fh *         fh;
 449         struct nfs_fattr *      fattr;
 450 };
 451
 452 struct nfs3_accessres {
 453         struct nfs_fattr *      fattr;
 454         __u32                   access;
 455 };
 456
 457 struct nfs3_readlinkargs {
 458         struct nfs_fh *         fh;
 459         unsigned int            pgbase;
 460         unsigned int            pglen;
 461         struct page **          pages;
 462 };
 463
 464 struct nfs3_renameres {
 465         struct nfs_fattr *      fromattr;
 466         struct nfs_fattr *      toattr;
 467 };
 468
 469 struct nfs3_linkres {
 470         struct nfs_fattr *      dir_attr;
 471         struct nfs_fattr *      fattr;
 472 };
 473
 474 struct nfs3_readdirres {
 475         struct nfs_fattr *      dir_attr;
 476         __u32 *                 verf;
 477         int                     plus;
 478 };
 479
 480 #ifdef CONFIG_NFS_V4
 481
 482 typedef u64 clientid4;
 483
 484 struct nfs4_accessargs {
 485         const struct nfs_fh *           fh;
 486         u32                             access;
 487 };
 488
 489 struct nfs4_accessres {
 490         u32                             supported;
 491         u32                             access;
 492 };
 493
 494 struct nfs4_create_arg {
 495         u32                             ftype;
 496         union {
 497                 struct qstr *           symlink;    /* NF4LNK */
 498                 struct {
 499                         u32             specdata1;
 500                         u32             specdata2;
 501                 } device;    /* NF4BLK, NF4CHR */
 502         } u;
 503         const struct qstr *             name;
 504         const struct nfs_server *       server;
 505         const struct iattr *            attrs;
 506         const struct nfs_fh *           dir_fh;
 507         const u32 *                     bitmask;
 508 };
 509
 510 struct nfs4_create_res {
 511         const struct nfs_server *       server;
 512         struct nfs_fh *                 fh;
 513         struct nfs_fattr *              fattr;
 514         struct nfs4_change_info         dir_cinfo;
 515 };
 516
 517 struct nfs4_fsinfo_arg {
 518         const struct nfs_fh *           fh;
 519         const u32 *                     bitmask;
 520 };
 521
 522 struct nfs4_getattr_arg {
 523         const struct nfs_fh *           fh;
 524         const u32 *                     bitmask;
 525 };
 526
 527 struct nfs4_getattr_res {
 528         const struct nfs_server *       server;
 529         struct nfs_fattr *              fattr;
 530 };
 531
 532 struct nfs4_link_arg {
 533         const struct nfs_fh *           fh;
 534         const struct nfs_fh *           dir_fh;
 535         const struct qstr *             name;
 536 };
 537
 538 struct nfs4_lookup_arg {
 539         const struct nfs_fh *           dir_fh;
 540         const struct qstr *             name;
 541         const u32 *                     bitmask;
 542 };
 543
 544 struct nfs4_lookup_res {
 545         const struct nfs_server *       server;
 546         struct nfs_fattr *              fattr;
 547         struct nfs_fh *                 fh;
 548 };
 549
 550 struct nfs4_lookup_root_arg {
 551         const u32 *                     bitmask;
 552 };
 553
 554 struct nfs4_pathconf_arg {
 555         const struct nfs_fh *           fh;
 556         const u32 *                     bitmask;
 557 };
 558
 559 struct nfs4_readdir_arg {
 560         const struct nfs_fh *           fh;
 561         u64                             cookie;
 562         nfs4_verifier                   verifier;
 563         u32                             count;
 564         struct page **                  pages;  /* zero-copy data */
 565         unsigned int                    pgbase; /* zero-copy data */
 566         const u32 *                     bitmask;
 567 };
 568
 569 struct nfs4_readdir_res {
 570         nfs4_verifier                   verifier;
 571         unsigned int                    pgbase;
 572 };
 573
 574 struct nfs4_readlink {
 575         const struct nfs_fh *           fh;
 576         unsigned int                    pgbase;
 577         unsigned int                    pglen;   /* zero-copy data */
 578         struct page **                  pages;   /* zero-copy data */
 579 };
 580
 581 struct nfs4_remove_arg {
 582         const struct nfs_fh *           fh;
 583         const struct qstr *             name;
 584 };
 585
 586 struct nfs4_rename_arg {
 587         const struct nfs_fh *           old_dir;
 588         const struct nfs_fh *           new_dir;
 589         const struct qstr *             old_name;
 590         const struct qstr *             new_name;
 591 };
 592
 593 struct nfs4_rename_res {
 594         struct nfs4_change_info         old_cinfo;
 595         struct nfs4_change_info         new_cinfo;
 596 };
 597
 598 struct nfs4_setclientid {
 599         const nfs4_verifier *           sc_verifier;      /* request */
 600         unsigned int                    sc_name_len;
 601         char                            sc_name[32];      /* request */
 602         u32                             sc_prog;          /* request */
 603         unsigned int                    sc_netid_len;
 604         char                            sc_netid[4];      /* request */
 605         unsigned int                    sc_uaddr_len;
 606         char                            sc_uaddr[24];     /* request */
 607         u32                             sc_cb_ident;      /* request */
 608 };
 609
 610 struct nfs4_statfs_arg {
 611         const struct nfs_fh *           fh;
 612         const u32 *                     bitmask;
 613 };
 614
 615 struct nfs4_server_caps_res {
 616         u32                             attr_bitmask[2];
 617         u32                             acl_bitmask;
 618         u32                             has_links;
 619         u32                             has_symlinks;
 620 };
 621
 622 #endif /* CONFIG_NFS_V4 */
 623
 624 struct nfs_page;
 625
 626 struct nfs_read_data {
 627         int                     flags;
 628         struct rpc_task         task;
 629         struct inode            *inode;
 630         struct rpc_cred         *cred;
 631         struct nfs_fattr        fattr;  /* fattr storage */
 632         struct list_head        pages;  /* Coalesced read requests */
 633         struct nfs_page         *req;   /* multi ops per nfs_page */
 634         struct page             *pagevec[NFS_READ_MAXIOV];
 635         struct nfs_readargs args;
 636         struct nfs_readres  res;
 637 #ifdef CONFIG_NFS_V4
 638         unsigned long           timestamp;      /* For lease renewal */
 639 #endif
 640         void (*complete) (struct nfs_read_data *, int);
 641 };
 642
 643 struct nfs_write_data {
 644         int                     flags;
 645         struct rpc_task         task;
 646         struct inode            *inode;
 647         struct rpc_cred         *cred;
 648         struct nfs_fattr        fattr;
 649         struct nfs_writeverf    verf;
 650         struct list_head        pages;          /* Coalesced requests we wish to flush */
 651         struct nfs_page         *req;           /* multi ops per nfs_page */
 652         struct page             *pagevec[NFS_WRITE_MAXIOV];
 653         struct nfs_writeargs    args;           /* argument struct */
 654         struct nfs_writeres     res;            /* result struct */
 655 #ifdef CONFIG_NFS_V4
 656         unsigned long           timestamp;      /* For lease renewal */
 657 #endif
 658         void (*complete) (struct nfs_write_data *, int);
 659 };
 660
 661 struct nfs_access_entry;
 662
 663 /*
 664  * RPC procedure vector for NFSv2/NFSv3 demuxing
 665  */
 666 struct nfs_rpc_ops {
 667         int     version;                /* Protocol version */
 668         struct dentry_operations *dentry_ops;
 669         struct inode_operations *dir_inode_ops;
 670
 671         int     (*getroot) (struct nfs_server *, struct nfs_fh *,
 672                             struct nfs_fsinfo *);
 673         int     (*getattr) (struct nfs_server *, struct nfs_fh *,
 674                             struct nfs_fattr *);
 675         int     (*setattr) (struct dentry *, struct nfs_fattr *,
 676                             struct iattr *);
 677         int     (*lookup)  (struct inode *, struct qstr *,
 678                             struct nfs_fh *, struct nfs_fattr *);
 679         int     (*access)  (struct inode *, struct nfs_access_entry *);
 680         int     (*readlink)(struct inode *, struct page *, unsigned int,
 681                             unsigned int);
 682         int     (*read)    (struct nfs_read_data *);
 683         int     (*write)   (struct nfs_write_data *);
 684         int     (*commit)  (struct nfs_write_data *);
 685         int     (*create)  (struct inode *, struct dentry *,
 686                             struct iattr *, int);
 687         int     (*remove)  (struct inode *, struct qstr *);
 688         int     (*unlink_setup)  (struct rpc_message *,
 689                             struct dentry *, struct qstr *);
 690         int     (*unlink_done) (struct dentry *, struct rpc_task *);
 691         int     (*rename)  (struct inode *, struct qstr *,
 692                             struct inode *, struct qstr *);
 693         int     (*link)    (struct inode *, struct inode *, struct qstr *);
 694         int     (*symlink) (struct inode *, struct qstr *, struct qstr *,
 695                             struct iattr *, struct nfs_fh *,
 696                             struct nfs_fattr *);
 697         int     (*mkdir)   (struct inode *, struct dentry *, struct iattr *);
 698         int     (*rmdir)   (struct inode *, struct qstr *);
 699         int     (*readdir) (struct dentry *, struct rpc_cred *,
 700                             u64, struct page *, unsigned int, int);
 701         int     (*mknod)   (struct inode *, struct dentry *, struct iattr *,
 702                             dev_t);
 703         int     (*statfs)  (struct nfs_server *, struct nfs_fh *,
 704                             struct nfs_fsstat *);
 705         int     (*fsinfo)  (struct nfs_server *, struct nfs_fh *,
 706                             struct nfs_fsinfo *);
 707         int     (*pathconf) (struct nfs_server *, struct nfs_fh *,
 708                              struct nfs_pathconf *);
 709         u32 *   (*decode_dirent)(u32 *, struct nfs_entry *, int plus);
 710         void    (*read_setup)   (struct nfs_read_data *);
 711         void    (*write_setup)  (struct nfs_write_data *, int how);
 712         void    (*commit_setup) (struct nfs_write_data *, int how);
 713         int     (*file_open)   (struct inode *, struct file *);
 714         int     (*file_release) (struct inode *, struct file *);
 715         int     (*lock)(struct file *, int, struct file_lock *);
 716 };
 717
 718 /*
 719  *      NFS_CALL(getattr, inode, (fattr));
 720  * into
 721  *      NFS_PROTO(inode)->getattr(fattr);
 722  */
 723 #define NFS_CALL(op, inode, args)       NFS_PROTO(inode)->op args
 724
 725 /*
 726  * Function vectors etc. for the NFS client
 727  */
 728 extern struct nfs_rpc_ops       nfs_v2_clientops;
 729 extern struct nfs_rpc_ops       nfs_v3_clientops;
 730 extern struct nfs_rpc_ops       nfs_v4_clientops;
 731 extern struct rpc_version       nfs_version2;
 732 extern struct rpc_version       nfs_version3;
 733 extern struct rpc_version       nfs_version4;
 734
 735 #endif