include/linux/nfs_xdr.h

   1 #ifndef _LINUX_NFS_XDR_H
   2 #define _LINUX_NFS_XDR_H
   3
   4 #include <linux/nfsacl.h>
   5
   6 /*
   7  * To change the maximum rsize and wsize supported by the NFS client, adjust
   8  * NFS_MAX_FILE_IO_SIZE.  64KB is a typical maximum, but some servers can
   9  * support a megabyte or more.  The default is left at 4096 bytes, which is
  10  * reasonable for NFS over UDP.
  11  */
  12 #define NFS_MAX_FILE_IO_SIZE    (1048576U)
  13 #define NFS_DEF_FILE_IO_SIZE    (4096U)
  14 #define NFS_MIN_FILE_IO_SIZE    (1024U)
  15
  16 struct nfs_fsid {
  17         uint64_t                major;
  18         uint64_t                minor;
  19 };
  20
  21 /*
  22  * Helper for checking equality between 2 fsids.
  23  */
  24 static inline int nfs_fsid_equal(const struct nfs_fsid *a, const struct nfs_fsid *b)
  25 {
  26         return a->major == b->major && a->minor == b->minor;
  27 }
  28
  29 struct nfs_fattr {
  30         unsigned short          valid;          /* which fields are valid */
  31         __u64                   pre_size;       /* pre_op_attr.size       */
  32         struct timespec         pre_mtime;      /* pre_op_attr.mtime      */
  33         struct timespec         pre_ctime;      /* pre_op_attr.ctime      */
  34         enum nfs_ftype          type;           /* always use NFSv2 types */
  35         __u32                   mode;
  36         __u32                   nlink;
  37         __u32                   uid;
  38         __u32                   gid;
  39         __u64                   size;
  40         union {
  41                 struct {
  42                         __u32   blocksize;
  43                         __u32   blocks;
  44                 } nfs2;
  45                 struct {
  46                         __u64   used;
  47                 } nfs3;
  48         } du;
  49         dev_t                   rdev;
  50         struct nfs_fsid         fsid;
  51         __u64                   fileid;
  52         struct timespec         atime;
  53         struct timespec         mtime;
  54         struct timespec         ctime;
  55         __u32                   bitmap[2];      /* NFSv4 returned attribute bitmap */
  56         __u64                   change_attr;    /* NFSv4 change attribute */
  57         __u64                   pre_change_attr;/* pre-op NFSv4 change attribute */
  58         unsigned long           time_start;
  59 };
  60
  61 #define NFS_ATTR_WCC            0x0001          /* pre-op WCC data    */
  62 #define NFS_ATTR_FATTR          0x0002          /* post-op attributes */
  63 #define NFS_ATTR_FATTR_V3       0x0004          /* NFSv3 attributes */
  64 #define NFS_ATTR_FATTR_V4       0x0008          /* NFSv4 change attribute */
  65 #define NFS_ATTR_FATTR_V4_REFERRAL      0x0010          /* NFSv4 referral */
  66
  67 /*
  68  * Info on the file system
  69  */
  70 struct nfs_fsinfo {
  71         struct nfs_fattr        *fattr; /* Post-op attributes */
  72         __u32                   rtmax;  /* max.  read transfer size */
  73         __u32                   rtpref; /* pref. read transfer size */
  74         __u32                   rtmult; /* reads should be multiple of this */
  75         __u32                   wtmax;  /* max.  write transfer size */
  76         __u32                   wtpref; /* pref. write transfer size */
  77         __u32                   wtmult; /* writes should be multiple of this */
  78         __u32                   dtpref; /* pref. readdir transfer size */
  79         __u64                   maxfilesize;
  80         __u32                   lease_time; /* in seconds */
  81 };
  82
  83 struct nfs_fsstat {
  84         struct nfs_fattr        *fattr; /* Post-op attributes */
  85         __u64                   tbytes; /* total size in bytes */
  86         __u64                   fbytes; /* # of free bytes */
  87         __u64                   abytes; /* # of bytes available to user */
  88         __u64                   tfiles; /* # of files */
  89         __u64                   ffiles; /* # of free files */
  90         __u64                   afiles; /* # of files available to user */
  91 };
  92
  93 struct nfs2_fsstat {
  94         __u32                   tsize;  /* Server transfer size */
  95         __u32                   bsize;  /* Filesystem block size */
  96         __u32                   blocks; /* No. of "bsize" blocks on filesystem */
  97         __u32                   bfree;  /* No. of free "bsize" blocks */
  98         __u32                   bavail; /* No. of available "bsize" blocks */
  99 };
 100
 101 struct nfs_pathconf {
 102         struct nfs_fattr        *fattr; /* Post-op attributes */
 103         __u32                   max_link; /* max # of hard links */
 104         __u32                   max_namelen; /* max name length */
 105 };
 106
 107 struct nfs4_change_info {
 108         u32                     atomic;
 109         u64                     before;
 110         u64                     after;
 111 };
 112
 113 struct nfs_seqid;
 114 /*
 115  * Arguments to the open call.
 116  */
 117 struct nfs_openargs {
 118         const struct nfs_fh *   fh;
 119         struct nfs_seqid *      seqid;
 120         int                     open_flags;
 121         __u64                   clientid;
 122         __u64                   id;
 123         union {
 124                 struct iattr *  attrs;    /* UNCHECKED, GUARDED */
 125                 nfs4_verifier   verifier; /* EXCLUSIVE */
 126                 nfs4_stateid    delegation;             /* CLAIM_DELEGATE_CUR */
 127                 int             delegation_type;        /* CLAIM_PREVIOUS */
 128         } u;
 129         const struct qstr *     name;
 130         const struct nfs_server *server;         /* Needed for ID mapping */
 131         const u32 *             bitmask;
 132         __u32                   claim;
 133 };
 134
 135 struct nfs_openres {
 136         nfs4_stateid            stateid;
 137         struct nfs_fh           fh;
 138         struct nfs4_change_info cinfo;
 139         __u32                   rflags;
 140         struct nfs_fattr *      f_attr;
 141         struct nfs_fattr *      dir_attr;
 142         const struct nfs_server *server;
 143         int                     delegation_type;
 144         nfs4_stateid            delegation;
 145         __u32                   do_recall;
 146         __u64                   maxsize;
 147         __u32                   attrset[NFS4_BITMAP_SIZE];
 148 };
 149
 150 /*
 151  * Arguments to the open_confirm call.
 152  */
 153 struct nfs_open_confirmargs {
 154         const struct nfs_fh *   fh;
 155         nfs4_stateid *          stateid;
 156         struct nfs_seqid *      seqid;
 157 };
 158
 159 struct nfs_open_confirmres {
 160         nfs4_stateid            stateid;
 161 };
 162
 163 /*
 164  * Arguments to the close call.
 165  */
 166 struct nfs_closeargs {
 167         struct nfs_fh *         fh;
 168         nfs4_stateid *          stateid;
 169         struct nfs_seqid *      seqid;
 170         int                     open_flags;
 171         const u32 *             bitmask;
 172 };
 173
 174 struct nfs_closeres {
 175         nfs4_stateid            stateid;
 176         struct nfs_fattr *      fattr;
 177         const struct nfs_server *server;
 178 };
 179 /*
 180  *  * Arguments to the lock,lockt, and locku call.
 181  *   */
 182 struct nfs_lowner {
 183         __u64                   clientid;
 184         __u64                   id;
 185 };
 186
 187 struct nfs_lock_args {
 188         struct nfs_fh *         fh;
 189         struct file_lock *      fl;
 190         struct nfs_seqid *      lock_seqid;
 191         nfs4_stateid *          lock_stateid;
 192         struct nfs_seqid *      open_seqid;
 193         nfs4_stateid *          open_stateid;
 194         struct nfs_lowner       lock_owner;
 195         unsigned char           block : 1;
 196         unsigned char           reclaim : 1;
 197         unsigned char           new_lock_owner : 1;
 198 };
 199
 200 struct nfs_lock_res {
 201         nfs4_stateid                    stateid;
 202 };
 203
 204 struct nfs_locku_args {
 205         struct nfs_fh *         fh;
 206         struct file_lock *      fl;
 207         struct nfs_seqid *      seqid;
 208         nfs4_stateid *          stateid;
 209 };
 210
 211 struct nfs_locku_res {
 212         nfs4_stateid                    stateid;
 213 };
 214
 215 struct nfs_lockt_args {
 216         struct nfs_fh *         fh;
 217         struct file_lock *      fl;
 218         struct nfs_lowner       lock_owner;
 219 };
 220
 221 struct nfs_lockt_res {
 222         struct file_lock *      denied; /* LOCK, LOCKT failed */
 223 };
 224
 225 struct nfs4_delegreturnargs {
 226         const struct nfs_fh *fhandle;
 227         const nfs4_stateid *stateid;
 228         const u32 * bitmask;
 229 };
 230
 231 struct nfs4_delegreturnres {
 232         struct nfs_fattr * fattr;
 233         const struct nfs_server *server;
 234 };
 235
 236 /*
 237  * Arguments to the read call.
 238  */
 239 struct nfs_readargs {
 240         struct nfs_fh *         fh;
 241         struct nfs_open_context *context;
 242         __u64                   offset;
 243         __u32                   count;
 244         unsigned int            pgbase;
 245         struct page **          pages;
 246 };
 247
 248 struct nfs_readres {
 249         struct nfs_fattr *      fattr;
 250         __u32                   count;
 251         int                     eof;
 252 };
 253
 254 /*
 255  * Arguments to the write call.
 256  */
 257 struct nfs_writeargs {
 258         struct nfs_fh *         fh;
 259         struct nfs_open_context *context;
 260         __u64                   offset;
 261         __u32                   count;
 262         enum nfs3_stable_how    stable;
 263         unsigned int            pgbase;
 264         struct page **          pages;
 265         const u32 *             bitmask;
 266 };
 267
 268 struct nfs_writeverf {
 269         enum nfs3_stable_how    committed;
 270         __be32                  verifier[2];
 271 };
 272
 273 struct nfs_writeres {
 274         struct nfs_fattr *      fattr;
 275         struct nfs_writeverf *  verf;
 276         __u32                   count;
 277         const struct nfs_server *server;
 278 };
 279
 280 /*
 281  * Common arguments to the unlink call
 282  */
 283 struct nfs_removeargs {
 284         const struct nfs_fh     *fh;
 285         struct qstr             name;
 286         const u32 *             bitmask;
 287 };
 288
 289 struct nfs_removeres {
 290         const struct nfs_server *server;
 291         struct nfs4_change_info cinfo;
 292         struct nfs_fattr        dir_attr;
 293 };
 294
 295 /*
 296  * Argument struct for decode_entry function
 297  */
 298 struct nfs_entry {
 299         __u64                   ino;
 300         __u64                   cookie,
 301                                 prev_cookie;
 302         const char *            name;
 303         unsigned int            len;
 304         int                     eof;
 305         struct nfs_fh *         fh;
 306         struct nfs_fattr *      fattr;
 307 };
 308
 309 /*
 310  * The following types are for NFSv2 only.
 311  */
 312 struct nfs_sattrargs {
 313         struct nfs_fh *         fh;
 314         struct iattr *          sattr;
 315 };
 316
 317 struct nfs_diropargs {
 318         struct nfs_fh *         fh;
 319         const char *            name;
 320         unsigned int            len;
 321 };
 322
 323 struct nfs_createargs {
 324         struct nfs_fh *         fh;
 325         const char *            name;
 326         unsigned int            len;
 327         struct iattr *          sattr;
 328 };
 329
 330 struct nfs_renameargs {
 331         struct nfs_fh *         fromfh;
 332         const char *            fromname;
 333         unsigned int            fromlen;
 334         struct nfs_fh *         tofh;
 335         const char *            toname;
 336         unsigned int            tolen;
 337 };
 338
 339 struct nfs_setattrargs {
 340         struct nfs_fh *                 fh;
 341         nfs4_stateid                    stateid;
 342         struct iattr *                  iap;
 343         const struct nfs_server *       server; /* Needed for name mapping */
 344         const u32 *                     bitmask;
 345 };
 346
 347 struct nfs_setaclargs {
 348         struct nfs_fh *                 fh;
 349         size_t                          acl_len;
 350         unsigned int                    acl_pgbase;
 351         struct page **                  acl_pages;
 352 };
 353
 354 struct nfs_getaclargs {
 355         struct nfs_fh *                 fh;
 356         size_t                          acl_len;
 357         unsigned int                    acl_pgbase;
 358         struct page **                  acl_pages;
 359 };
 360
 361 struct nfs_setattrres {
 362         struct nfs_fattr *              fattr;
 363         const struct nfs_server *       server;
 364 };
 365
 366 struct nfs_linkargs {
 367         struct nfs_fh *         fromfh;
 368         struct nfs_fh *         tofh;
 369         const char *            toname;
 370         unsigned int            tolen;
 371 };
 372
 373 struct nfs_symlinkargs {
 374         struct nfs_fh *         fromfh;
 375         const char *            fromname;
 376         unsigned int            fromlen;
 377         struct page **          pages;
 378         unsigned int            pathlen;
 379         struct iattr *          sattr;
 380 };
 381
 382 struct nfs_readdirargs {
 383         struct nfs_fh *         fh;
 384         __u32                   cookie;
 385         unsigned int            count;
 386         struct page **          pages;
 387 };
 388
 389 struct nfs3_getaclargs {
 390         struct nfs_fh *         fh;
 391         int                     mask;
 392         struct page **          pages;
 393 };
 394
 395 struct nfs3_setaclargs {
 396         struct inode *          inode;
 397         int                     mask;
 398         struct posix_acl *      acl_access;
 399         struct posix_acl *      acl_default;
 400         struct page **          pages;
 401 };
 402
 403 struct nfs_diropok {
 404         struct nfs_fh *         fh;
 405         struct nfs_fattr *      fattr;
 406 };
 407
 408 struct nfs_readlinkargs {
 409         struct nfs_fh *         fh;
 410         unsigned int            pgbase;
 411         unsigned int            pglen;
 412         struct page **          pages;
 413 };
 414
 415 struct nfs3_sattrargs {
 416         struct nfs_fh *         fh;
 417         struct iattr *          sattr;
 418         unsigned int            guard;
 419         struct timespec         guardtime;
 420 };
 421
 422 struct nfs3_diropargs {
 423         struct nfs_fh *         fh;
 424         const char *            name;
 425         unsigned int            len;
 426 };
 427
 428 struct nfs3_accessargs {
 429         struct nfs_fh *         fh;
 430         __u32                   access;
 431 };
 432
 433 struct nfs3_createargs {
 434         struct nfs_fh *         fh;
 435         const char *            name;
 436         unsigned int            len;
 437         struct iattr *          sattr;
 438         enum nfs3_createmode    createmode;
 439         __be32                  verifier[2];
 440 };
 441
 442 struct nfs3_mkdirargs {
 443         struct nfs_fh *         fh;
 444         const char *            name;
 445         unsigned int            len;
 446         struct iattr *          sattr;
 447 };
 448
 449 struct nfs3_symlinkargs {
 450         struct nfs_fh *         fromfh;
 451         const char *            fromname;
 452         unsigned int            fromlen;
 453         struct page **          pages;
 454         unsigned int            pathlen;
 455         struct iattr *          sattr;
 456 };
 457
 458 struct nfs3_mknodargs {
 459         struct nfs_fh *         fh;
 460         const char *            name;
 461         unsigned int            len;
 462         enum nfs3_ftype         type;
 463         struct iattr *          sattr;
 464         dev_t                   rdev;
 465 };
 466
 467 struct nfs3_renameargs {
 468         struct nfs_fh *         fromfh;
 469         const char *            fromname;
 470         unsigned int            fromlen;
 471         struct nfs_fh *         tofh;
 472         const char *            toname;
 473         unsigned int            tolen;
 474 };
 475
 476 struct nfs3_linkargs {
 477         struct nfs_fh *         fromfh;
 478         struct nfs_fh *         tofh;
 479         const char *            toname;
 480         unsigned int            tolen;
 481 };
 482
 483 struct nfs3_readdirargs {
 484         struct nfs_fh *         fh;
 485         __u64                   cookie;
 486         __be32                  verf[2];
 487         int                     plus;
 488         unsigned int            count;
 489         struct page **          pages;
 490 };
 491
 492 struct nfs3_diropres {
 493         struct nfs_fattr *      dir_attr;
 494         struct nfs_fh *         fh;
 495         struct nfs_fattr *      fattr;
 496 };
 497
 498 struct nfs3_accessres {
 499         struct nfs_fattr *      fattr;
 500         __u32                   access;
 501 };
 502
 503 struct nfs3_readlinkargs {
 504         struct nfs_fh *         fh;
 505         unsigned int            pgbase;
 506         unsigned int            pglen;
 507         struct page **          pages;
 508 };
 509
 510 struct nfs3_renameres {
 511         struct nfs_fattr *      fromattr;
 512         struct nfs_fattr *      toattr;
 513 };
 514
 515 struct nfs3_linkres {
 516         struct nfs_fattr *      dir_attr;
 517         struct nfs_fattr *      fattr;
 518 };
 519
 520 struct nfs3_readdirres {
 521         struct nfs_fattr *      dir_attr;
 522         __be32 *                verf;
 523         int                     plus;
 524 };
 525
 526 struct nfs3_getaclres {
 527         struct nfs_fattr *      fattr;
 528         int                     mask;
 529         unsigned int            acl_access_count;
 530         unsigned int            acl_default_count;
 531         struct posix_acl *      acl_access;
 532         struct posix_acl *      acl_default;
 533 };
 534
 535 #ifdef CONFIG_NFS_V4
 536
 537 typedef u64 clientid4;
 538
 539 struct nfs4_accessargs {
 540         const struct nfs_fh *           fh;
 541         u32                             access;
 542 };
 543
 544 struct nfs4_accessres {
 545         u32                             supported;
 546         u32                             access;
 547 };
 548
 549 struct nfs4_create_arg {
 550         u32                             ftype;
 551         union {
 552                 struct {
 553                         struct page **  pages;
 554                         unsigned int    len;
 555                 } symlink;   /* NF4LNK */
 556                 struct {
 557                         u32             specdata1;
 558                         u32             specdata2;
 559                 } device;    /* NF4BLK, NF4CHR */
 560         } u;
 561         const struct qstr *             name;
 562         const struct nfs_server *       server;
 563         const struct iattr *            attrs;
 564         const struct nfs_fh *           dir_fh;
 565         const u32 *                     bitmask;
 566 };
 567
 568 struct nfs4_create_res {
 569         const struct nfs_server *       server;
 570         struct nfs_fh *                 fh;
 571         struct nfs_fattr *              fattr;
 572         struct nfs4_change_info         dir_cinfo;
 573         struct nfs_fattr *              dir_fattr;
 574 };
 575
 576 struct nfs4_fsinfo_arg {
 577         const struct nfs_fh *           fh;
 578         const u32 *                     bitmask;
 579 };
 580
 581 struct nfs4_getattr_arg {
 582         const struct nfs_fh *           fh;
 583         const u32 *                     bitmask;
 584 };
 585
 586 struct nfs4_getattr_res {
 587         const struct nfs_server *       server;
 588         struct nfs_fattr *              fattr;
 589 };
 590
 591 struct nfs4_link_arg {
 592         const struct nfs_fh *           fh;
 593         const struct nfs_fh *           dir_fh;
 594         const struct qstr *             name;
 595         const u32 *                     bitmask;
 596 };
 597
 598 struct nfs4_link_res {
 599         const struct nfs_server *       server;
 600         struct nfs_fattr *              fattr;
 601         struct nfs4_change_info         cinfo;
 602         struct nfs_fattr *              dir_attr;
 603 };
 604
 605
 606 struct nfs4_lookup_arg {
 607         const struct nfs_fh *           dir_fh;
 608         const struct qstr *             name;
 609         const u32 *                     bitmask;
 610 };
 611
 612 struct nfs4_lookup_res {
 613         const struct nfs_server *       server;
 614         struct nfs_fattr *              fattr;
 615         struct nfs_fh *                 fh;
 616 };
 617
 618 struct nfs4_lookup_root_arg {
 619         const u32 *                     bitmask;
 620 };
 621
 622 struct nfs4_pathconf_arg {
 623         const struct nfs_fh *           fh;
 624         const u32 *                     bitmask;
 625 };
 626
 627 struct nfs4_readdir_arg {
 628         const struct nfs_fh *           fh;
 629         u64                             cookie;
 630         nfs4_verifier                   verifier;
 631         u32                             count;
 632         struct page **                  pages;  /* zero-copy data */
 633         unsigned int                    pgbase; /* zero-copy data */
 634         const u32 *                     bitmask;
 635 };
 636
 637 struct nfs4_readdir_res {
 638         nfs4_verifier                   verifier;
 639         unsigned int                    pgbase;
 640 };
 641
 642 struct nfs4_readlink {
 643         const struct nfs_fh *           fh;
 644         unsigned int                    pgbase;
 645         unsigned int                    pglen;   /* zero-copy data */
 646         struct page **                  pages;   /* zero-copy data */
 647 };
 648
 649 struct nfs4_rename_arg {
 650         const struct nfs_fh *           old_dir;
 651         const struct nfs_fh *           new_dir;
 652         const struct qstr *             old_name;
 653         const struct qstr *             new_name;
 654         const u32 *                     bitmask;
 655 };
 656
 657 struct nfs4_rename_res {
 658         const struct nfs_server *       server;
 659         struct nfs4_change_info         old_cinfo;
 660         struct nfs_fattr *              old_fattr;
 661         struct nfs4_change_info         new_cinfo;
 662         struct nfs_fattr *              new_fattr;
 663 };
 664
 665 struct nfs4_setclientid {
 666         const nfs4_verifier *           sc_verifier;      /* request */
 667         unsigned int                    sc_name_len;
 668         char                            sc_name[48];      /* request */
 669         u32                             sc_prog;          /* request */
 670         unsigned int                    sc_netid_len;
 671         char                            sc_netid[4];      /* request */
 672         unsigned int                    sc_uaddr_len;
 673         char                            sc_uaddr[24];     /* request */
 674         u32                             sc_cb_ident;      /* request */
 675 };
 676
 677 struct nfs4_statfs_arg {
 678         const struct nfs_fh *           fh;
 679         const u32 *                     bitmask;
 680 };
 681
 682 struct nfs4_server_caps_res {
 683         u32                             attr_bitmask[2];
 684         u32                             acl_bitmask;
 685         u32                             has_links;
 686         u32                             has_symlinks;
 687 };
 688
 689 struct nfs4_string {
 690         unsigned int len;
 691         char *data;
 692 };
 693
 694 #define NFS4_PATHNAME_MAXCOMPONENTS 512
 695 struct nfs4_pathname {
 696         unsigned int ncomponents;
 697         struct nfs4_string components[NFS4_PATHNAME_MAXCOMPONENTS];
 698 };
 699
 700 #define NFS4_FS_LOCATION_MAXSERVERS 10
 701 struct nfs4_fs_location {
 702         unsigned int nservers;
 703         struct nfs4_string servers[NFS4_FS_LOCATION_MAXSERVERS];
 704         struct nfs4_pathname rootpath;
 705 };
 706
 707 #define NFS4_FS_LOCATIONS_MAXENTRIES 10
 708 struct nfs4_fs_locations {
 709         struct nfs_fattr fattr;
 710         const struct nfs_server *server;
 711         struct nfs4_pathname fs_path;
 712         int nlocations;
 713         struct nfs4_fs_location locations[NFS4_FS_LOCATIONS_MAXENTRIES];
 714 };
 715
 716 struct nfs4_fs_locations_arg {
 717         const struct nfs_fh *dir_fh;
 718         const struct qstr *name;
 719         struct page *page;
 720         const u32 *bitmask;
 721 };
 722
 723 #endif /* CONFIG_NFS_V4 */
 724
 725 struct nfs_page;
 726
 727 #define NFS_PAGEVEC_SIZE        (8U)
 728
 729 struct nfs_read_data {
 730         int                     flags;
 731         struct rpc_task         task;
 732         struct inode            *inode;
 733         struct rpc_cred         *cred;
 734         struct nfs_fattr        fattr;  /* fattr storage */
 735         struct list_head        pages;  /* Coalesced read requests */
 736         struct nfs_page         *req;   /* multi ops per nfs_page */
 737         struct page             **pagevec;
 738         unsigned int            npages; /* Max length of pagevec */
 739         struct nfs_readargs args;
 740         struct nfs_readres  res;
 741 #ifdef CONFIG_NFS_V4
 742         unsigned long           timestamp;      /* For lease renewal */
 743 #endif
 744         struct page             *page_array[NFS_PAGEVEC_SIZE];
 745 };
 746
 747 struct nfs_write_data {
 748         int                     flags;
 749         struct rpc_task         task;
 750         struct inode            *inode;
 751         struct rpc_cred         *cred;
 752         struct nfs_fattr        fattr;
 753         struct nfs_writeverf    verf;
 754         struct list_head        pages;          /* Coalesced requests we wish to flush */
 755         struct nfs_page         *req;           /* multi ops per nfs_page */
 756         struct page             **pagevec;
 757         unsigned int            npages;         /* Max length of pagevec */
 758         struct nfs_writeargs    args;           /* argument struct */
 759         struct nfs_writeres     res;            /* result struct */
 760 #ifdef CONFIG_NFS_V4
 761         unsigned long           timestamp;      /* For lease renewal */
 762 #endif
 763         struct page             *page_array[NFS_PAGEVEC_SIZE];
 764 };
 765
 766 struct nfs_access_entry;
 767
 768 /*
 769  * RPC procedure vector for NFSv2/NFSv3 demuxing
 770  */
 771 struct nfs_rpc_ops {
 772         int     version;                /* Protocol version */
 773         struct dentry_operations *dentry_ops;
 774         const struct inode_operations *dir_inode_ops;
 775         const struct inode_operations *file_inode_ops;
 776
 777         int     (*getroot) (struct nfs_server *, struct nfs_fh *,
 778                             struct nfs_fsinfo *);
 779         int     (*lookupfh)(struct nfs_server *, struct nfs_fh *,
 780                             struct qstr *, struct nfs_fh *,
 781                             struct nfs_fattr *);
 782         int     (*getattr) (struct nfs_server *, struct nfs_fh *,
 783                             struct nfs_fattr *);
 784         int     (*setattr) (struct dentry *, struct nfs_fattr *,
 785                             struct iattr *);
 786         int     (*lookup)  (struct inode *, struct qstr *,
 787                             struct nfs_fh *, struct nfs_fattr *);
 788         int     (*access)  (struct inode *, struct nfs_access_entry *);
 789         int     (*readlink)(struct inode *, struct page *, unsigned int,
 790                             unsigned int);
 791         int     (*create)  (struct inode *, struct dentry *,
 792                             struct iattr *, int, struct nameidata *);
 793         int     (*remove)  (struct inode *, struct qstr *);
 794         void    (*unlink_setup)  (struct rpc_message *, struct inode *dir);
 795         int     (*unlink_done) (struct rpc_task *, struct inode *);
 796         int     (*rename)  (struct inode *, struct qstr *,
 797                             struct inode *, struct qstr *);
 798         int     (*link)    (struct inode *, struct inode *, struct qstr *);
 799         int     (*symlink) (struct inode *, struct dentry *, struct page *,
 800                             unsigned int, struct iattr *);
 801         int     (*mkdir)   (struct inode *, struct dentry *, struct iattr *);
 802         int     (*rmdir)   (struct inode *, struct qstr *);
 803         int     (*readdir) (struct dentry *, struct rpc_cred *,
 804                             u64, struct page *, unsigned int, int);
 805         int     (*mknod)   (struct inode *, struct dentry *, struct iattr *,
 806                             dev_t);
 807         int     (*statfs)  (struct nfs_server *, struct nfs_fh *,
 808                             struct nfs_fsstat *);
 809         int     (*fsinfo)  (struct nfs_server *, struct nfs_fh *,
 810                             struct nfs_fsinfo *);
 811         int     (*pathconf) (struct nfs_server *, struct nfs_fh *,
 812                              struct nfs_pathconf *);
 813         int     (*set_capabilities)(struct nfs_server *, struct nfs_fh *);
 814         __be32 *(*decode_dirent)(__be32 *, struct nfs_entry *, int plus);
 815         void    (*read_setup)   (struct nfs_read_data *);
 816         int     (*read_done)  (struct rpc_task *, struct nfs_read_data *);
 817         void    (*write_setup)  (struct nfs_write_data *, int how);
 818         int     (*write_done)  (struct rpc_task *, struct nfs_write_data *);
 819         void    (*commit_setup) (struct nfs_write_data *, int how);
 820         int     (*commit_done) (struct rpc_task *, struct nfs_write_data *);
 821         int     (*file_open)   (struct inode *, struct file *);
 822         int     (*file_release) (struct inode *, struct file *);
 823         int     (*lock)(struct file *, int, struct file_lock *);
 824         void    (*clear_acl_cache)(struct inode *);
 825 };
 826
 827 /*
 828  *      NFS_CALL(getattr, inode, (fattr));
 829  * into
 830  *      NFS_PROTO(inode)->getattr(fattr);
 831  */
 832 #define NFS_CALL(op, inode, args)       NFS_PROTO(inode)->op args
 833
 834 /*
 835  * Function vectors etc. for the NFS client
 836  */
 837 extern const struct nfs_rpc_ops nfs_v2_clientops;
 838 extern const struct nfs_rpc_ops nfs_v3_clientops;
 839 extern const struct nfs_rpc_ops nfs_v4_clientops;
 840 extern struct rpc_version       nfs_version2;
 841 extern struct rpc_version       nfs_version3;
 842 extern struct rpc_version       nfs_version4;
 843
 844 extern struct rpc_version       nfsacl_version3;
 845 extern struct rpc_program       nfsacl_program;
 846
 847 #endif