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 #include "internal.h"
  48
  49 #define NFSDBG_FACILITY         NFSDBG_PROC
  50
  51 /*
  52  * Bare-bones access to getattr: this is for nfs_read_super.
  53  */
  54 static int
  55 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  56                   struct nfs_fsinfo *info)
  57 {
  58         struct nfs_fattr *fattr = info->fattr;
  59         struct nfs2_fsstat fsinfo;
  60         struct rpc_message msg = {
  61                 .rpc_proc       = &nfs_procedures[NFSPROC_GETATTR],
  62                 .rpc_argp       = fhandle,
  63                 .rpc_resp       = fattr,
  64         };
  65         int status;
  66
  67         dprintk("%s: call getattr\n", __FUNCTION__);
  68         nfs_fattr_init(fattr);
  69         status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
  70         dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
  71         if (status)
  72                 return status;
  73         dprintk("%s: call statfs\n", __FUNCTION__);
  74         msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
  75         msg.rpc_resp = &fsinfo;
  76         status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
  77         dprintk("%s: reply statfs: %d\n", __FUNCTION__, status);
  78         if (status)
  79                 return status;
  80         info->rtmax  = NFS_MAXDATA;
  81         info->rtpref = fsinfo.tsize;
  82         info->rtmult = fsinfo.bsize;
  83         info->wtmax  = NFS_MAXDATA;
  84         info->wtpref = fsinfo.tsize;
  85         info->wtmult = fsinfo.bsize;
  86         info->dtpref = fsinfo.tsize;
  87         info->maxfilesize = 0x7FFFFFFF;
  88         info->lease_time = 0;
  89         return 0;
  90 }
  91
  92 /*
  93  * One function for each procedure in the NFS protocol.
  94  */
  95 static int
  96 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
  97                 struct nfs_fattr *fattr)
  98 {
  99         struct rpc_message msg = {
 100                 .rpc_proc       = &nfs_procedures[NFSPROC_GETATTR],
 101                 .rpc_argp       = fhandle,
 102                 .rpc_resp       = fattr,
 103         };
 104         int     status;
 105
 106         dprintk("NFS call  getattr\n");
 107         nfs_fattr_init(fattr);
 108         status = rpc_call_sync(server->client, &msg, 0);
 109         dprintk("NFS reply getattr: %d\n", status);
 110         return status;
 111 }
 112
 113 static int
 114 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 115                  struct iattr *sattr)
 116 {
 117         struct inode *inode = dentry->d_inode;
 118         struct nfs_sattrargs    arg = {
 119                 .fh     = NFS_FH(inode),
 120                 .sattr  = sattr
 121         };
 122         struct rpc_message msg = {
 123                 .rpc_proc       = &nfs_procedures[NFSPROC_SETATTR],
 124                 .rpc_argp       = &arg,
 125                 .rpc_resp       = fattr,
 126         };
 127         int     status;
 128
 129         /* Mask out the non-modebit related stuff from attr->ia_mode */
 130         sattr->ia_mode &= S_IALLUGO;
 131
 132         dprintk("NFS call  setattr\n");
 133         nfs_fattr_init(fattr);
 134         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 135         if (status == 0)
 136                 nfs_setattr_update_inode(inode, sattr);
 137         dprintk("NFS reply setattr: %d\n", status);
 138         return status;
 139 }
 140
 141 static int
 142 nfs_proc_lookup(struct inode *dir, struct qstr *name,
 143                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 144 {
 145         struct nfs_diropargs    arg = {
 146                 .fh             = NFS_FH(dir),
 147                 .name           = name->name,
 148                 .len            = name->len
 149         };
 150         struct nfs_diropok      res = {
 151                 .fh             = fhandle,
 152                 .fattr          = fattr
 153         };
 154         struct rpc_message msg = {
 155                 .rpc_proc       = &nfs_procedures[NFSPROC_LOOKUP],
 156                 .rpc_argp       = &arg,
 157                 .rpc_resp       = &res,
 158         };
 159         int                     status;
 160
 161         dprintk("NFS call  lookup %s\n", name->name);
 162         nfs_fattr_init(fattr);
 163         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 164         dprintk("NFS reply lookup: %d\n", status);
 165         return status;
 166 }
 167
 168 static int nfs_proc_readlink(struct inode *inode, struct page *page,
 169                 unsigned int pgbase, unsigned int pglen)
 170 {
 171         struct nfs_readlinkargs args = {
 172                 .fh             = NFS_FH(inode),
 173                 .pgbase         = pgbase,
 174                 .pglen          = pglen,
 175                 .pages          = &page
 176         };
 177         struct rpc_message msg = {
 178                 .rpc_proc       = &nfs_procedures[NFSPROC_READLINK],
 179                 .rpc_argp       = &args,
 180         };
 181         int                     status;
 182
 183         dprintk("NFS call  readlink\n");
 184         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 185         dprintk("NFS reply readlink: %d\n", status);
 186         return status;
 187 }
 188
 189 static int nfs_proc_read(struct nfs_read_data *rdata)
 190 {
 191         int                     flags = rdata->flags;
 192         struct inode *          inode = rdata->inode;
 193         struct nfs_fattr *      fattr = rdata->res.fattr;
 194         struct rpc_message      msg = {
 195                 .rpc_proc       = &nfs_procedures[NFSPROC_READ],
 196                 .rpc_argp       = &rdata->args,
 197                 .rpc_resp       = &rdata->res,
 198                 .rpc_cred       = rdata->cred,
 199         };
 200         int                     status;
 201
 202         dprintk("NFS call  read %d @ %Ld\n", rdata->args.count,
 203                         (long long) rdata->args.offset);
 204         nfs_fattr_init(fattr);
 205         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 206         if (status >= 0) {
 207                 nfs_refresh_inode(inode, fattr);
 208                 /* Emulate the eof flag, which isn't normally needed in NFSv2
 209                  * as it is guaranteed to always return the file attributes
 210                  */
 211                 if (rdata->args.offset + rdata->args.count >= fattr->size)
 212                         rdata->res.eof = 1;
 213         }
 214         dprintk("NFS reply read: %d\n", status);
 215         return status;
 216 }
 217
 218 static int
 219 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 220                 int flags, struct nameidata *nd)
 221 {
 222         struct nfs_fh           fhandle;
 223         struct nfs_fattr        fattr;
 224         struct nfs_createargs   arg = {
 225                 .fh             = NFS_FH(dir),
 226                 .name           = dentry->d_name.name,
 227                 .len            = dentry->d_name.len,
 228                 .sattr          = sattr
 229         };
 230         struct nfs_diropok      res = {
 231                 .fh             = &fhandle,
 232                 .fattr          = &fattr
 233         };
 234         struct rpc_message msg = {
 235                 .rpc_proc       = &nfs_procedures[NFSPROC_CREATE],
 236                 .rpc_argp       = &arg,
 237                 .rpc_resp       = &res,
 238         };
 239         int                     status;
 240
 241         nfs_fattr_init(&fattr);
 242         dprintk("NFS call  create %s\n", dentry->d_name.name);
 243         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 244         if (status == 0)
 245                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 246         dprintk("NFS reply create: %d\n", status);
 247         return status;
 248 }
 249
 250 /*
 251  * In NFSv2, mknod is grafted onto the create call.
 252  */
 253 static int
 254 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 255                dev_t rdev)
 256 {
 257         struct nfs_fh fhandle;
 258         struct nfs_fattr fattr;
 259         struct nfs_createargs   arg = {
 260                 .fh             = NFS_FH(dir),
 261                 .name           = dentry->d_name.name,
 262                 .len            = dentry->d_name.len,
 263                 .sattr          = sattr
 264         };
 265         struct nfs_diropok      res = {
 266                 .fh             = &fhandle,
 267                 .fattr          = &fattr
 268         };
 269         struct rpc_message msg = {
 270                 .rpc_proc       = &nfs_procedures[NFSPROC_CREATE],
 271                 .rpc_argp       = &arg,
 272                 .rpc_resp       = &res,
 273         };
 274         int status, mode;
 275
 276         dprintk("NFS call  mknod %s\n", dentry->d_name.name);
 277
 278         mode = sattr->ia_mode;
 279         if (S_ISFIFO(mode)) {
 280                 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
 281                 sattr->ia_valid &= ~ATTR_SIZE;
 282         } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
 283                 sattr->ia_valid |= ATTR_SIZE;
 284                 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
 285         }
 286
 287         nfs_fattr_init(&fattr);
 288         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 289         nfs_mark_for_revalidate(dir);
 290
 291         if (status == -EINVAL && S_ISFIFO(mode)) {
 292                 sattr->ia_mode = mode;
 293                 nfs_fattr_init(&fattr);
 294                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 295         }
 296         if (status == 0)
 297                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 298         dprintk("NFS reply mknod: %d\n", status);
 299         return status;
 300 }
 301
 302 static int
 303 nfs_proc_remove(struct inode *dir, struct qstr *name)
 304 {
 305         struct nfs_diropargs    arg = {
 306                 .fh             = NFS_FH(dir),
 307                 .name           = name->name,
 308                 .len            = name->len
 309         };
 310         struct rpc_message      msg = {
 311                 .rpc_proc       = &nfs_procedures[NFSPROC_REMOVE],
 312                 .rpc_argp       = &arg,
 313         };
 314         int                     status;
 315
 316         dprintk("NFS call  remove %s\n", name->name);
 317         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 318         nfs_mark_for_revalidate(dir);
 319
 320         dprintk("NFS reply remove: %d\n", status);
 321         return status;
 322 }
 323
 324 static int
 325 nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
 326 {
 327         struct nfs_diropargs    *arg;
 328
 329         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
 330         if (!arg)
 331                 return -ENOMEM;
 332         arg->fh = NFS_FH(dir->d_inode);
 333         arg->name = name->name;
 334         arg->len = name->len;
 335         msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
 336         msg->rpc_argp = arg;
 337         return 0;
 338 }
 339
 340 static int
 341 nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
 342 {
 343         struct rpc_message *msg = &task->tk_msg;
 344
 345         if (msg->rpc_argp) {
 346                 nfs_mark_for_revalidate(dir->d_inode);
 347                 kfree(msg->rpc_argp);
 348         }
 349         return 0;
 350 }
 351
 352 static int
 353 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
 354                 struct inode *new_dir, struct qstr *new_name)
 355 {
 356         struct nfs_renameargs   arg = {
 357                 .fromfh         = NFS_FH(old_dir),
 358                 .fromname       = old_name->name,
 359                 .fromlen        = old_name->len,
 360                 .tofh           = NFS_FH(new_dir),
 361                 .toname         = new_name->name,
 362                 .tolen          = new_name->len
 363         };
 364         struct rpc_message msg = {
 365                 .rpc_proc       = &nfs_procedures[NFSPROC_RENAME],
 366                 .rpc_argp       = &arg,
 367         };
 368         int                     status;
 369
 370         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 371         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 372         nfs_mark_for_revalidate(old_dir);
 373         nfs_mark_for_revalidate(new_dir);
 374         dprintk("NFS reply rename: %d\n", status);
 375         return status;
 376 }
 377
 378 static int
 379 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 380 {
 381         struct nfs_linkargs     arg = {
 382                 .fromfh         = NFS_FH(inode),
 383                 .tofh           = NFS_FH(dir),
 384                 .toname         = name->name,
 385                 .tolen          = name->len
 386         };
 387         struct rpc_message msg = {
 388                 .rpc_proc       = &nfs_procedures[NFSPROC_LINK],
 389                 .rpc_argp       = &arg,
 390         };
 391         int                     status;
 392
 393         dprintk("NFS call  link %s\n", name->name);
 394         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 395         nfs_mark_for_revalidate(inode);
 396         nfs_mark_for_revalidate(dir);
 397         dprintk("NFS reply link: %d\n", status);
 398         return status;
 399 }
 400
 401 static int
 402 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 403                  unsigned int len, struct iattr *sattr)
 404 {
 405         struct nfs_fh fhandle;
 406         struct nfs_fattr fattr;
 407         struct nfs_symlinkargs  arg = {
 408                 .fromfh         = NFS_FH(dir),
 409                 .fromname       = dentry->d_name.name,
 410                 .fromlen        = dentry->d_name.len,
 411                 .pages          = &page,
 412                 .pathlen        = len,
 413                 .sattr          = sattr
 414         };
 415         struct rpc_message msg = {
 416                 .rpc_proc       = &nfs_procedures[NFSPROC_SYMLINK],
 417                 .rpc_argp       = &arg,
 418         };
 419         int                     status;
 420
 421         if (len > NFS2_MAXPATHLEN)
 422                 return -ENAMETOOLONG;
 423
 424         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 425
 426         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 427         nfs_mark_for_revalidate(dir);
 428
 429         /*
 430          * V2 SYMLINK requests don't return any attributes.  Setting the
 431          * filehandle size to zero indicates to nfs_instantiate that it
 432          * should fill in the data with a LOOKUP call on the wire.
 433          */
 434         if (status == 0) {
 435                 nfs_fattr_init(&fattr);
 436                 fhandle.size = 0;
 437                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 438         }
 439
 440         dprintk("NFS reply symlink: %d\n", status);
 441         return status;
 442 }
 443
 444 static int
 445 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 446 {
 447         struct nfs_fh fhandle;
 448         struct nfs_fattr fattr;
 449         struct nfs_createargs   arg = {
 450                 .fh             = NFS_FH(dir),
 451                 .name           = dentry->d_name.name,
 452                 .len            = dentry->d_name.len,
 453                 .sattr          = sattr
 454         };
 455         struct nfs_diropok      res = {
 456                 .fh             = &fhandle,
 457                 .fattr          = &fattr
 458         };
 459         struct rpc_message msg = {
 460                 .rpc_proc       = &nfs_procedures[NFSPROC_MKDIR],
 461                 .rpc_argp       = &arg,
 462                 .rpc_resp       = &res,
 463         };
 464         int                     status;
 465
 466         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 467         nfs_fattr_init(&fattr);
 468         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 469         nfs_mark_for_revalidate(dir);
 470         if (status == 0)
 471                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 472         dprintk("NFS reply mkdir: %d\n", status);
 473         return status;
 474 }
 475
 476 static int
 477 nfs_proc_rmdir(struct inode *dir, struct qstr *name)
 478 {
 479         struct nfs_diropargs    arg = {
 480                 .fh             = NFS_FH(dir),
 481                 .name           = name->name,
 482                 .len            = name->len
 483         };
 484         struct rpc_message msg = {
 485                 .rpc_proc       = &nfs_procedures[NFSPROC_RMDIR],
 486                 .rpc_argp       = &arg,
 487         };
 488         int                     status;
 489
 490         dprintk("NFS call  rmdir %s\n", name->name);
 491         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 492         nfs_mark_for_revalidate(dir);
 493         dprintk("NFS reply rmdir: %d\n", status);
 494         return status;
 495 }
 496
 497 /*
 498  * The READDIR implementation is somewhat hackish - we pass a temporary
 499  * buffer to the encode function, which installs it in the receive
 500  * the receive iovec. The decode function just parses the reply to make
 501  * sure it is syntactically correct; the entries itself are decoded
 502  * from nfs_readdir by calling the decode_entry function directly.
 503  */
 504 static int
 505 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 506                  u64 cookie, struct page *page, unsigned int count, int plus)
 507 {
 508         struct inode            *dir = dentry->d_inode;
 509         struct nfs_readdirargs  arg = {
 510                 .fh             = NFS_FH(dir),
 511                 .cookie         = cookie,
 512                 .count          = count,
 513                 .pages          = &page,
 514         };
 515         struct rpc_message      msg = {
 516                 .rpc_proc       = &nfs_procedures[NFSPROC_READDIR],
 517                 .rpc_argp       = &arg,
 518                 .rpc_cred       = cred,
 519         };
 520         int                     status;
 521
 522         dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
 523         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 524
 525         dprintk("NFS reply readdir: %d\n", status);
 526         return status;
 527 }
 528
 529 static int
 530 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 531                         struct nfs_fsstat *stat)
 532 {
 533         struct nfs2_fsstat fsinfo;
 534         struct rpc_message msg = {
 535                 .rpc_proc       = &nfs_procedures[NFSPROC_STATFS],
 536                 .rpc_argp       = fhandle,
 537                 .rpc_resp       = &fsinfo,
 538         };
 539         int     status;
 540
 541         dprintk("NFS call  statfs\n");
 542         nfs_fattr_init(stat->fattr);
 543         status = rpc_call_sync(server->client, &msg, 0);
 544         dprintk("NFS reply statfs: %d\n", status);
 545         if (status)
 546                 goto out;
 547         stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
 548         stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
 549         stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
 550         stat->tfiles = 0;
 551         stat->ffiles = 0;
 552         stat->afiles = 0;
 553 out:
 554         return status;
 555 }
 556
 557 static int
 558 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 559                         struct nfs_fsinfo *info)
 560 {
 561         struct nfs2_fsstat fsinfo;
 562         struct rpc_message msg = {
 563                 .rpc_proc       = &nfs_procedures[NFSPROC_STATFS],
 564                 .rpc_argp       = fhandle,
 565                 .rpc_resp       = &fsinfo,
 566         };
 567         int     status;
 568
 569         dprintk("NFS call  fsinfo\n");
 570         nfs_fattr_init(info->fattr);
 571         status = rpc_call_sync(server->client, &msg, 0);
 572         dprintk("NFS reply fsinfo: %d\n", status);
 573         if (status)
 574                 goto out;
 575         info->rtmax  = NFS_MAXDATA;
 576         info->rtpref = fsinfo.tsize;
 577         info->rtmult = fsinfo.bsize;
 578         info->wtmax  = NFS_MAXDATA;
 579         info->wtpref = fsinfo.tsize;
 580         info->wtmult = fsinfo.bsize;
 581         info->dtpref = fsinfo.tsize;
 582         info->maxfilesize = 0x7FFFFFFF;
 583         info->lease_time = 0;
 584 out:
 585         return status;
 586 }
 587
 588 static int
 589 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 590                   struct nfs_pathconf *info)
 591 {
 592         info->max_link = 0;
 593         info->max_namelen = NFS2_MAXNAMLEN;
 594         return 0;
 595 }
 596
 597 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
 598 {
 599         if (task->tk_status >= 0) {
 600                 nfs_refresh_inode(data->inode, data->res.fattr);
 601                 /* Emulate the eof flag, which isn't normally needed in NFSv2
 602                  * as it is guaranteed to always return the file attributes
 603                  */
 604                 if (data->args.offset + data->args.count >= data->res.fattr->size)
 605                         data->res.eof = 1;
 606         }
 607         return 0;
 608 }
 609
 610 static void nfs_proc_read_setup(struct nfs_read_data *data)
 611 {
 612         struct rpc_message      msg = {
 613                 .rpc_proc       = &nfs_procedures[NFSPROC_READ],
 614                 .rpc_argp       = &data->args,
 615                 .rpc_resp       = &data->res,
 616                 .rpc_cred       = data->cred,
 617         };
 618
 619         rpc_call_setup(&data->task, &msg, 0);
 620 }
 621
 622 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
 623 {
 624         if (task->tk_status >= 0)
 625                 nfs_post_op_update_inode(data->inode, data->res.fattr);
 626         return 0;
 627 }
 628
 629 static void nfs_proc_write_setup(struct nfs_write_data *data, int how)
 630 {
 631         struct rpc_message      msg = {
 632                 .rpc_proc       = &nfs_procedures[NFSPROC_WRITE],
 633                 .rpc_argp       = &data->args,
 634                 .rpc_resp       = &data->res,
 635                 .rpc_cred       = data->cred,
 636         };
 637
 638         /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
 639         data->args.stable = NFS_FILE_SYNC;
 640
 641         /* Finalize the task. */
 642         rpc_call_setup(&data->task, &msg, 0);
 643 }
 644
 645 static void
 646 nfs_proc_commit_setup(struct nfs_write_data *data, int how)
 647 {
 648         BUG();
 649 }
 650
 651 static int
 652 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 653 {
 654         return nlmclnt_proc(filp->f_path.dentry->d_inode, cmd, fl);
 655 }
 656
 657
 658 const struct nfs_rpc_ops nfs_v2_clientops = {
 659         .version        = 2,                   /* protocol version */
 660         .dentry_ops     = &nfs_dentry_operations,
 661         .dir_inode_ops  = &nfs_dir_inode_operations,
 662         .file_inode_ops = &nfs_file_inode_operations,
 663         .getroot        = nfs_proc_get_root,
 664         .getattr        = nfs_proc_getattr,
 665         .setattr        = nfs_proc_setattr,
 666         .lookup         = nfs_proc_lookup,
 667         .access         = NULL,                /* access */
 668         .readlink       = nfs_proc_readlink,
 669         .read           = nfs_proc_read,
 670         .create         = nfs_proc_create,
 671         .remove         = nfs_proc_remove,
 672         .unlink_setup   = nfs_proc_unlink_setup,
 673         .unlink_done    = nfs_proc_unlink_done,
 674         .rename         = nfs_proc_rename,
 675         .link           = nfs_proc_link,
 676         .symlink        = nfs_proc_symlink,
 677         .mkdir          = nfs_proc_mkdir,
 678         .rmdir          = nfs_proc_rmdir,
 679         .readdir        = nfs_proc_readdir,
 680         .mknod          = nfs_proc_mknod,
 681         .statfs         = nfs_proc_statfs,
 682         .fsinfo         = nfs_proc_fsinfo,
 683         .pathconf       = nfs_proc_pathconf,
 684         .decode_dirent  = nfs_decode_dirent,
 685         .read_setup     = nfs_proc_read_setup,
 686         .read_done      = nfs_read_done,
 687         .write_setup    = nfs_proc_write_setup,
 688         .write_done     = nfs_write_done,
 689         .commit_setup   = nfs_proc_commit_setup,
 690         .file_open      = nfs_open,
 691         .file_release   = nfs_release,
 692         .lock           = nfs_proc_lock,
 693 };