fs/nfs/proc.c

   1 /*
   2  *  linux/fs/nfs/proc.c
   3  *
   4  *  Copyright (C) 1992, 1993, 1994  Rick Sladkey
   5  *
   6  *  OS-independent nfs remote procedure call functions
   7  *
   8  *  Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
   9  *  so at last we can have decent(ish) throughput off a
  10  *  Sun server.
  11  *
  12  *  Coding optimized and cleaned up by Florian La Roche.
  13  *  Note: Error returns are optimized for NFS_OK, which isn't translated via
  14  *  nfs_stat_to_errno(), but happens to be already the right return code.
  15  *
  16  *  Also, the code currently doesn't check the size of the packet, when
  17  *  it decodes the packet.
  18  *
  19  *  Feel free to fix it and mail me the diffs if it worries you.
  20  *
  21  *  Completely rewritten to support the new RPC call interface;
  22  *  rewrote and moved the entire XDR stuff to xdr.c
  23  *  --Olaf Kirch June 1996
  24  *
  25  *  The code below initializes all auto variables explicitly, otherwise
  26  *  it will fail to work as a module (gcc generates a memset call for an
  27  *  incomplete struct).
  28  */
  29
  30 #include <linux/types.h>
  31 #include <linux/param.h>
  32 #include <linux/slab.h>
  33 #include <linux/time.h>
  34 #include <linux/mm.h>
  35 #include <linux/utsname.h>
  36 #include <linux/errno.h>
  37 #include <linux/string.h>
  38 #include <linux/in.h>
  39 #include <linux/pagemap.h>
  40 #include <linux/sunrpc/clnt.h>
  41 #include <linux/nfs.h>
  42 #include <linux/nfs2.h>
  43 #include <linux/nfs_fs.h>
  44 #include <linux/nfs_page.h>
  45 #include <linux/lockd/bind.h>
  46 #include <linux/smp_lock.h>
  47
  48 #define NFSDBG_FACILITY         NFSDBG_PROC
  49
  50 extern struct rpc_procinfo nfs_procedures[];
  51
  52 /*
  53  * Bare-bones access to getattr: this is for nfs_read_super.
  54  */
  55 static int
  56 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  57                   struct nfs_fsinfo *info)
  58 {
  59         struct nfs_fattr *fattr = info->fattr;
  60         struct nfs2_fsstat fsinfo;
  61         int status;
  62
  63         dprintk("%s: call getattr\n", __FUNCTION__);
  64         fattr->valid = 0;
  65         status = rpc_call(server->client_sys, NFSPROC_GETATTR, fhandle, fattr, 0);
  66         dprintk("%s: reply getattr %d\n", __FUNCTION__, status);
  67         if (status)
  68                 return status;
  69         dprintk("%s: call statfs\n", __FUNCTION__);
  70         status = rpc_call(server->client_sys, NFSPROC_STATFS, fhandle, &fsinfo, 0);
  71         dprintk("%s: reply statfs %d\n", __FUNCTION__, status);
  72         if (status)
  73                 return status;
  74         info->rtmax  = NFS_MAXDATA;
  75         info->rtpref = fsinfo.tsize;
  76         info->rtmult = fsinfo.bsize;
  77         info->wtmax  = NFS_MAXDATA;
  78         info->wtpref = fsinfo.tsize;
  79         info->wtmult = fsinfo.bsize;
  80         info->dtpref = fsinfo.tsize;
  81         info->maxfilesize = 0x7FFFFFFF;
  82         info->lease_time = 0;
  83         return 0;
  84 }
  85
  86 /*
  87  * One function for each procedure in the NFS protocol.
  88  */
  89 static int
  90 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
  91                 struct nfs_fattr *fattr)
  92 {
  93         int     status;
  94
  95         dprintk("NFS call  getattr\n");
  96         fattr->valid = 0;
  97         status = rpc_call(server->client, NFSPROC_GETATTR,
  98                                 fhandle, fattr, 0);
  99         dprintk("NFS reply getattr\n");
 100         return status;
 101 }
 102
 103 static int
 104 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 105                  struct iattr *sattr)
 106 {
 107         struct inode *inode = dentry->d_inode;
 108         struct nfs_sattrargs    arg = {
 109                 .fh     = NFS_FH(inode),
 110                 .sattr  = sattr
 111         };
 112         int     status;
 113
 114         dprintk("NFS call  setattr\n");
 115         fattr->valid = 0;
 116         status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0);
 117         dprintk("NFS reply setattr\n");
 118         return status;
 119 }
 120
 121 static int
 122 nfs_proc_lookup(struct inode *dir, struct qstr *name,
 123                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 124 {
 125         struct nfs_diropargs    arg = {
 126                 .fh             = NFS_FH(dir),
 127                 .name           = name->name,
 128                 .len            = name->len
 129         };
 130         struct nfs_diropok      res = {
 131                 .fh             = fhandle,
 132                 .fattr          = fattr
 133         };
 134         int                     status;
 135
 136         dprintk("NFS call  lookup %s\n", name->name);
 137         fattr->valid = 0;
 138         status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0);
 139         dprintk("NFS reply lookup: %d\n", status);
 140         return status;
 141 }
 142
 143 static int nfs_proc_readlink(struct inode *inode, struct page *page,
 144                 unsigned int pgbase, unsigned int pglen)
 145 {
 146         struct nfs_readlinkargs args = {
 147                 .fh             = NFS_FH(inode),
 148                 .pgbase         = pgbase,
 149                 .pglen          = pglen,
 150                 .pages          = &page
 151         };
 152         int                     status;
 153
 154         dprintk("NFS call  readlink\n");
 155         status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0);
 156         dprintk("NFS reply readlink: %d\n", status);
 157         return status;
 158 }
 159
 160 static int nfs_proc_read(struct nfs_read_data *rdata)
 161 {
 162         int                     flags = rdata->flags;
 163         struct inode *          inode = rdata->inode;
 164         struct nfs_fattr *      fattr = rdata->res.fattr;
 165         struct rpc_message      msg = {
 166                 .rpc_proc       = &nfs_procedures[NFSPROC_READ],
 167                 .rpc_argp       = &rdata->args,
 168                 .rpc_resp       = &rdata->res,
 169                 .rpc_cred       = rdata->cred,
 170         };
 171         int                     status;
 172
 173         dprintk("NFS call  read %d @ %Ld\n", rdata->args.count,
 174                         (long long) rdata->args.offset);
 175         fattr->valid = 0;
 176         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 177         if (status >= 0) {
 178                 nfs_refresh_inode(inode, fattr);
 179                 /* Emulate the eof flag, which isn't normally needed in NFSv2
 180                  * as it is guaranteed to always return the file attributes
 181                  */
 182                 if (rdata->args.offset + rdata->args.count >= fattr->size)
 183                         rdata->res.eof = 1;
 184         }
 185         dprintk("NFS reply read: %d\n", status);
 186         return status;
 187 }
 188
 189 static int nfs_proc_write(struct nfs_write_data *wdata)
 190 {
 191         int                     flags = wdata->flags;
 192         struct inode *          inode = wdata->inode;
 193         struct nfs_fattr *      fattr = wdata->res.fattr;
 194         struct rpc_message      msg = {
 195                 .rpc_proc       = &nfs_procedures[NFSPROC_WRITE],
 196                 .rpc_argp       = &wdata->args,
 197                 .rpc_resp       = &wdata->res,
 198                 .rpc_cred       = wdata->cred,
 199         };
 200         int                     status;
 201
 202         dprintk("NFS call  write %d @ %Ld\n", wdata->args.count,
 203                         (long long) wdata->args.offset);
 204         fattr->valid = 0;
 205         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 206         if (status >= 0) {
 207                 nfs_refresh_inode(inode, fattr);
 208                 wdata->res.count = wdata->args.count;
 209                 wdata->verf.committed = NFS_FILE_SYNC;
 210         }
 211         dprintk("NFS reply write: %d\n", status);
 212         return status < 0? status : wdata->res.count;
 213 }
 214
 215 static struct inode *
 216 nfs_proc_create(struct inode *dir, struct qstr *name, struct iattr *sattr,
 217                 int flags)
 218 {
 219         struct nfs_fh           fhandle;
 220         struct nfs_fattr        fattr;
 221         struct nfs_createargs   arg = {
 222                 .fh             = NFS_FH(dir),
 223                 .name           = name->name,
 224                 .len            = name->len,
 225                 .sattr          = sattr
 226         };
 227         struct nfs_diropok      res = {
 228                 .fh             = &fhandle,
 229                 .fattr          = &fattr
 230         };
 231         int                     status;
 232
 233         fattr.valid = 0;
 234         dprintk("NFS call  create %s\n", name->name);
 235         status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
 236         dprintk("NFS reply create: %d\n", status);
 237         if (status == 0) {
 238                 struct inode *inode;
 239                 inode = nfs_fhget(dir->i_sb, &fhandle, &fattr);
 240                 if (inode)
 241                         return inode;
 242                 status = -ENOMEM;
 243         }
 244         return ERR_PTR(status);
 245 }
 246
 247 /*
 248  * In NFSv2, mknod is grafted onto the create call.
 249  */
 250 static int
 251 nfs_proc_mknod(struct inode *dir, struct qstr *name, struct iattr *sattr,
 252                dev_t rdev, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 253 {
 254         struct nfs_createargs   arg = {
 255                 .fh             = NFS_FH(dir),
 256                 .name           = name->name,
 257                 .len            = name->len,
 258                 .sattr          = sattr
 259         };
 260         struct nfs_diropok      res = {
 261                 .fh             = fhandle,
 262                 .fattr          = fattr
 263         };
 264         int                     status, mode;
 265
 266         dprintk("NFS call  mknod %s\n", name->name);
 267
 268         mode = sattr->ia_mode;
 269         if (S_ISFIFO(mode)) {
 270                 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
 271                 sattr->ia_valid &= ~ATTR_SIZE;
 272         } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
 273                 sattr->ia_valid |= ATTR_SIZE;
 274                 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
 275         }
 276
 277         fattr->valid = 0;
 278         status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
 279
 280         if (status == -EINVAL && S_ISFIFO(mode)) {
 281                 sattr->ia_mode = mode;
 282                 fattr->valid = 0;
 283                 status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
 284         }
 285         dprintk("NFS reply mknod: %d\n", status);
 286         return status;
 287 }
 288
 289 static int
 290 nfs_proc_remove(struct inode *dir, struct qstr *name)
 291 {
 292         struct nfs_diropargs    arg = {
 293                 .fh             = NFS_FH(dir),
 294                 .name           = name->name,
 295                 .len            = name->len
 296         };
 297         struct rpc_message      msg = {
 298                 .rpc_proc       = &nfs_procedures[NFSPROC_REMOVE],
 299                 .rpc_argp       = &arg,
 300                 .rpc_resp       = NULL,
 301                 .rpc_cred       = NULL
 302         };
 303         int                     status;
 304
 305         dprintk("NFS call  remove %s\n", name->name);
 306         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 307
 308         dprintk("NFS reply remove: %d\n", status);
 309         return status;
 310 }
 311
 312 static int
 313 nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
 314 {
 315         struct nfs_diropargs    *arg;
 316
 317         arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL);
 318         if (!arg)
 319                 return -ENOMEM;
 320         arg->fh = NFS_FH(dir->d_inode);
 321         arg->name = name->name;
 322         arg->len = name->len;
 323         msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
 324         msg->rpc_argp = arg;
 325         return 0;
 326 }
 327
 328 static int
 329 nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
 330 {
 331         struct rpc_message *msg = &task->tk_msg;
 332
 333         if (msg->rpc_argp)
 334                 kfree(msg->rpc_argp);
 335         return 0;
 336 }
 337
 338 static int
 339 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
 340                 struct inode *new_dir, struct qstr *new_name)
 341 {
 342         struct nfs_renameargs   arg = {
 343                 .fromfh         = NFS_FH(old_dir),
 344                 .fromname       = old_name->name,
 345                 .fromlen        = old_name->len,
 346                 .tofh           = NFS_FH(new_dir),
 347                 .toname         = new_name->name,
 348                 .tolen          = new_name->len
 349         };
 350         int                     status;
 351
 352         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 353         status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0);
 354         dprintk("NFS reply rename: %d\n", status);
 355         return status;
 356 }
 357
 358 static int
 359 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 360 {
 361         struct nfs_linkargs     arg = {
 362                 .fromfh         = NFS_FH(inode),
 363                 .tofh           = NFS_FH(dir),
 364                 .toname         = name->name,
 365                 .tolen          = name->len
 366         };
 367         int                     status;
 368
 369         dprintk("NFS call  link %s\n", name->name);
 370         status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0);
 371         dprintk("NFS reply link: %d\n", status);
 372         return status;
 373 }
 374
 375 static int
 376 nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
 377                  struct iattr *sattr, struct nfs_fh *fhandle,
 378                  struct nfs_fattr *fattr)
 379 {
 380         struct nfs_symlinkargs  arg = {
 381                 .fromfh         = NFS_FH(dir),
 382                 .fromname       = name->name,
 383                 .fromlen        = name->len,
 384                 .topath         = path->name,
 385                 .tolen          = path->len,
 386                 .sattr          = sattr
 387         };
 388         int                     status;
 389
 390         if (path->len > NFS2_MAXPATHLEN)
 391                 return -ENAMETOOLONG;
 392         dprintk("NFS call  symlink %s -> %s\n", name->name, path->name);
 393         fattr->valid = 0;
 394         fhandle->size = 0;
 395         status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0);
 396         dprintk("NFS reply symlink: %d\n", status);
 397         return status;
 398 }
 399
 400 static int
 401 nfs_proc_mkdir(struct inode *dir, struct qstr *name, struct iattr *sattr,
 402                struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 403 {
 404         struct nfs_createargs   arg = {
 405                 .fh             = NFS_FH(dir),
 406                 .name           = name->name,
 407                 .len            = name->len,
 408                 .sattr          = sattr
 409         };
 410         struct nfs_diropok      res = {
 411                 .fh             = fhandle,
 412                 .fattr          = fattr
 413         };
 414         int                     status;
 415
 416         dprintk("NFS call  mkdir %s\n", name->name);
 417         fattr->valid = 0;
 418         status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0);
 419         dprintk("NFS reply mkdir: %d\n", status);
 420         return status;
 421 }
 422
 423 static int
 424 nfs_proc_rmdir(struct inode *dir, struct qstr *name)
 425 {
 426         struct nfs_diropargs    arg = {
 427                 .fh             = NFS_FH(dir),
 428                 .name           = name->name,
 429                 .len            = name->len
 430         };
 431         int                     status;
 432
 433         dprintk("NFS call  rmdir %s\n", name->name);
 434         status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0);
 435         dprintk("NFS reply rmdir: %d\n", status);
 436         return status;
 437 }
 438
 439 /*
 440  * The READDIR implementation is somewhat hackish - we pass a temporary
 441  * buffer to the encode function, which installs it in the receive
 442  * the receive iovec. The decode function just parses the reply to make
 443  * sure it is syntactically correct; the entries itself are decoded
 444  * from nfs_readdir by calling the decode_entry function directly.
 445  */
 446 static int
 447 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 448                  u64 cookie, struct page *page, unsigned int count, int plus)
 449 {
 450         struct inode            *dir = dentry->d_inode;
 451         struct nfs_readdirargs  arg = {
 452                 .fh             = NFS_FH(dir),
 453                 .cookie         = cookie,
 454                 .count          = count,
 455                 .pages          = &page
 456         };
 457         struct rpc_message      msg = {
 458                 .rpc_proc       = &nfs_procedures[NFSPROC_READDIR],
 459                 .rpc_argp       = &arg,
 460                 .rpc_resp       = NULL,
 461                 .rpc_cred       = cred
 462         };
 463         int                     status;
 464
 465         lock_kernel();
 466
 467         dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
 468         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 469
 470         dprintk("NFS reply readdir: %d\n", status);
 471         unlock_kernel();
 472         return status;
 473 }
 474
 475 static int
 476 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 477                         struct nfs_fsstat *stat)
 478 {
 479         struct nfs2_fsstat fsinfo;
 480         int     status;
 481
 482         dprintk("NFS call  statfs\n");
 483         stat->fattr->valid = 0;
 484         status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0);
 485         dprintk("NFS reply statfs: %d\n", status);
 486         if (status)
 487                 goto out;
 488         stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
 489         stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
 490         stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
 491         stat->tfiles = 0;
 492         stat->ffiles = 0;
 493         stat->afiles = 0;
 494 out:
 495         return status;
 496 }
 497
 498 static int
 499 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 500                         struct nfs_fsinfo *info)
 501 {
 502         struct nfs2_fsstat fsinfo;
 503         int     status;
 504
 505         dprintk("NFS call  fsinfo\n");
 506         info->fattr->valid = 0;
 507         status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0);
 508         dprintk("NFS reply fsinfo: %d\n", status);
 509         if (status)
 510                 goto out;
 511         info->rtmax  = NFS_MAXDATA;
 512         info->rtpref = fsinfo.tsize;
 513         info->rtmult = fsinfo.bsize;
 514         info->wtmax  = NFS_MAXDATA;
 515         info->wtpref = fsinfo.tsize;
 516         info->wtmult = fsinfo.bsize;
 517         info->dtpref = fsinfo.tsize;
 518         info->maxfilesize = 0x7FFFFFFF;
 519         info->lease_time = 0;
 520 out:
 521         return status;
 522 }
 523
 524 static int
 525 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 526                   struct nfs_pathconf *info)
 527 {
 528         info->max_link = 0;
 529         info->max_namelen = NFS2_MAXNAMLEN;
 530         return 0;
 531 }
 532
 533 extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
 534
 535 static void
 536 nfs_read_done(struct rpc_task *task)
 537 {
 538         struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
 539
 540         if (task->tk_status >= 0) {
 541                 nfs_refresh_inode(data->inode, data->res.fattr);
 542                 /* Emulate the eof flag, which isn't normally needed in NFSv2
 543                  * as it is guaranteed to always return the file attributes
 544                  */
 545                 if (data->args.offset + data->args.count >= data->res.fattr->size)
 546                         data->res.eof = 1;
 547         }
 548         nfs_readpage_result(task);
 549 }
 550
 551 static void
 552 nfs_proc_read_setup(struct nfs_read_data *data)
 553 {
 554         struct rpc_task         *task = &data->task;
 555         struct inode            *inode = data->inode;
 556         int                     flags;
 557         struct rpc_message      msg = {
 558                 .rpc_proc       = &nfs_procedures[NFSPROC_READ],
 559                 .rpc_argp       = &data->args,
 560                 .rpc_resp       = &data->res,
 561                 .rpc_cred       = data->cred,
 562         };
 563
 564         /* N.B. Do we need to test? Never called for swapfile inode */
 565         flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
 566
 567         /* Finalize the task. */
 568         rpc_init_task(task, NFS_CLIENT(inode), nfs_read_done, flags);
 569         rpc_call_setup(task, &msg, 0);
 570 }
 571
 572 static void
 573 nfs_write_done(struct rpc_task *task)
 574 {
 575         struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
 576
 577         if (task->tk_status >= 0)
 578                 nfs_refresh_inode(data->inode, data->res.fattr);
 579         nfs_writeback_done(task);
 580 }
 581
 582 static void
 583 nfs_proc_write_setup(struct nfs_write_data *data, int how)
 584 {
 585         struct rpc_task         *task = &data->task;
 586         struct inode            *inode = data->inode;
 587         int                     flags;
 588         struct rpc_message      msg = {
 589                 .rpc_proc       = &nfs_procedures[NFSPROC_WRITE],
 590                 .rpc_argp       = &data->args,
 591                 .rpc_resp       = &data->res,
 592                 .rpc_cred       = data->cred,
 593         };
 594
 595         /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
 596         data->args.stable = NFS_FILE_SYNC;
 597
 598         /* Set the initial flags for the task.  */
 599         flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 600
 601         /* Finalize the task. */
 602         rpc_init_task(task, NFS_CLIENT(inode), nfs_write_done, flags);
 603         rpc_call_setup(task, &msg, 0);
 604 }
 605
 606 static void
 607 nfs_proc_commit_setup(struct nfs_write_data *data, int how)
 608 {
 609         BUG();
 610 }
 611
 612 static int
 613 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 614 {
 615         return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
 616 }
 617
 618
 619 struct nfs_rpc_ops      nfs_v2_clientops = {
 620         .version        = 2,                   /* protocol version */
 621         .dentry_ops     = &nfs_dentry_operations,
 622         .dir_inode_ops  = &nfs_dir_inode_operations,
 623         .getroot        = nfs_proc_get_root,
 624         .getattr        = nfs_proc_getattr,
 625         .setattr        = nfs_proc_setattr,
 626         .lookup         = nfs_proc_lookup,
 627         .access         = NULL,                /* access */
 628         .readlink       = nfs_proc_readlink,
 629         .read           = nfs_proc_read,
 630         .write          = nfs_proc_write,
 631         .commit         = NULL,                /* commit */
 632         .create         = nfs_proc_create,
 633         .remove         = nfs_proc_remove,
 634         .unlink_setup   = nfs_proc_unlink_setup,
 635         .unlink_done    = nfs_proc_unlink_done,
 636         .rename         = nfs_proc_rename,
 637         .link           = nfs_proc_link,
 638         .symlink        = nfs_proc_symlink,
 639         .mkdir          = nfs_proc_mkdir,
 640         .rmdir          = nfs_proc_rmdir,
 641         .readdir        = nfs_proc_readdir,
 642         .mknod          = nfs_proc_mknod,
 643         .statfs         = nfs_proc_statfs,
 644         .fsinfo         = nfs_proc_fsinfo,
 645         .pathconf       = nfs_proc_pathconf,
 646         .decode_dirent  = nfs_decode_dirent,
 647         .read_setup     = nfs_proc_read_setup,
 648         .write_setup    = nfs_proc_write_setup,
 649         .commit_setup   = nfs_proc_commit_setup,
 650         .file_open      = nfs_open,
 651         .file_release   = nfs_release,
 652         .lock           = nfs_proc_lock,
 653 };