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         nfs_fattr_init(fattr);
  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         nfs_fattr_init(fattr);
  97         status = rpc_call(server->client, NFSPROC_GETATTR,
  98                                 fhandle, fattr, 0);
  99         dprintk("NFS reply getattr: %d\n", status);
 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         /* Mask out the non-modebit related stuff from attr->ia_mode */
 115         sattr->ia_mode &= S_IALLUGO;
 116
 117         dprintk("NFS call  setattr\n");
 118         nfs_fattr_init(fattr);
 119         status = rpc_call(NFS_CLIENT(inode), NFSPROC_SETATTR, &arg, fattr, 0);
 120         if (status == 0)
 121                 nfs_setattr_update_inode(inode, sattr);
 122         dprintk("NFS reply setattr: %d\n", status);
 123         return status;
 124 }
 125
 126 static int
 127 nfs_proc_lookup(struct inode *dir, struct qstr *name,
 128                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 129 {
 130         struct nfs_diropargs    arg = {
 131                 .fh             = NFS_FH(dir),
 132                 .name           = name->name,
 133                 .len            = name->len
 134         };
 135         struct nfs_diropok      res = {
 136                 .fh             = fhandle,
 137                 .fattr          = fattr
 138         };
 139         int                     status;
 140
 141         dprintk("NFS call  lookup %s\n", name->name);
 142         nfs_fattr_init(fattr);
 143         status = rpc_call(NFS_CLIENT(dir), NFSPROC_LOOKUP, &arg, &res, 0);
 144         dprintk("NFS reply lookup: %d\n", status);
 145         return status;
 146 }
 147
 148 static int nfs_proc_readlink(struct inode *inode, struct page *page,
 149                 unsigned int pgbase, unsigned int pglen)
 150 {
 151         struct nfs_readlinkargs args = {
 152                 .fh             = NFS_FH(inode),
 153                 .pgbase         = pgbase,
 154                 .pglen          = pglen,
 155                 .pages          = &page
 156         };
 157         int                     status;
 158
 159         dprintk("NFS call  readlink\n");
 160         status = rpc_call(NFS_CLIENT(inode), NFSPROC_READLINK, &args, NULL, 0);
 161         dprintk("NFS reply readlink: %d\n", status);
 162         return status;
 163 }
 164
 165 static int nfs_proc_read(struct nfs_read_data *rdata)
 166 {
 167         int                     flags = rdata->flags;
 168         struct inode *          inode = rdata->inode;
 169         struct nfs_fattr *      fattr = rdata->res.fattr;
 170         struct rpc_message      msg = {
 171                 .rpc_proc       = &nfs_procedures[NFSPROC_READ],
 172                 .rpc_argp       = &rdata->args,
 173                 .rpc_resp       = &rdata->res,
 174                 .rpc_cred       = rdata->cred,
 175         };
 176         int                     status;
 177
 178         dprintk("NFS call  read %d @ %Ld\n", rdata->args.count,
 179                         (long long) rdata->args.offset);
 180         nfs_fattr_init(fattr);
 181         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 182         if (status >= 0) {
 183                 nfs_refresh_inode(inode, fattr);
 184                 /* Emulate the eof flag, which isn't normally needed in NFSv2
 185                  * as it is guaranteed to always return the file attributes
 186                  */
 187                 if (rdata->args.offset + rdata->args.count >= fattr->size)
 188                         rdata->res.eof = 1;
 189         }
 190         dprintk("NFS reply read: %d\n", status);
 191         return status;
 192 }
 193
 194 static int nfs_proc_write(struct nfs_write_data *wdata)
 195 {
 196         int                     flags = wdata->flags;
 197         struct inode *          inode = wdata->inode;
 198         struct nfs_fattr *      fattr = wdata->res.fattr;
 199         struct rpc_message      msg = {
 200                 .rpc_proc       = &nfs_procedures[NFSPROC_WRITE],
 201                 .rpc_argp       = &wdata->args,
 202                 .rpc_resp       = &wdata->res,
 203                 .rpc_cred       = wdata->cred,
 204         };
 205         int                     status;
 206
 207         dprintk("NFS call  write %d @ %Ld\n", wdata->args.count,
 208                         (long long) wdata->args.offset);
 209         nfs_fattr_init(fattr);
 210         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 211         if (status >= 0) {
 212                 nfs_post_op_update_inode(inode, fattr);
 213                 wdata->res.count = wdata->args.count;
 214                 wdata->verf.committed = NFS_FILE_SYNC;
 215         }
 216         dprintk("NFS reply write: %d\n", status);
 217         return status < 0? status : wdata->res.count;
 218 }
 219
 220 static int
 221 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 222                 int flags, struct nameidata *nd)
 223 {
 224         struct nfs_fh           fhandle;
 225         struct nfs_fattr        fattr;
 226         struct nfs_createargs   arg = {
 227                 .fh             = NFS_FH(dir),
 228                 .name           = dentry->d_name.name,
 229                 .len            = dentry->d_name.len,
 230                 .sattr          = sattr
 231         };
 232         struct nfs_diropok      res = {
 233                 .fh             = &fhandle,
 234                 .fattr          = &fattr
 235         };
 236         int                     status;
 237
 238         nfs_fattr_init(&fattr);
 239         dprintk("NFS call  create %s\n", dentry->d_name.name);
 240         status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
 241         if (status == 0)
 242                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 243         dprintk("NFS reply create: %d\n", status);
 244         return 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 dentry *dentry, struct iattr *sattr,
 252                dev_t rdev)
 253 {
 254         struct nfs_fh fhandle;
 255         struct nfs_fattr fattr;
 256         struct nfs_createargs   arg = {
 257                 .fh             = NFS_FH(dir),
 258                 .name           = dentry->d_name.name,
 259                 .len            = dentry->d_name.len,
 260                 .sattr          = sattr
 261         };
 262         struct nfs_diropok      res = {
 263                 .fh             = &fhandle,
 264                 .fattr          = &fattr
 265         };
 266         int status, mode;
 267
 268         dprintk("NFS call  mknod %s\n", dentry->d_name.name);
 269
 270         mode = sattr->ia_mode;
 271         if (S_ISFIFO(mode)) {
 272                 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
 273                 sattr->ia_valid &= ~ATTR_SIZE;
 274         } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
 275                 sattr->ia_valid |= ATTR_SIZE;
 276                 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
 277         }
 278
 279         nfs_fattr_init(&fattr);
 280         status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
 281         nfs_mark_for_revalidate(dir);
 282
 283         if (status == -EINVAL && S_ISFIFO(mode)) {
 284                 sattr->ia_mode = mode;
 285                 nfs_fattr_init(&fattr);
 286                 status = rpc_call(NFS_CLIENT(dir), NFSPROC_CREATE, &arg, &res, 0);
 287         }
 288         if (status == 0)
 289                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 290         dprintk("NFS reply mknod: %d\n", status);
 291         return status;
 292 }
 293
 294 static int
 295 nfs_proc_remove(struct inode *dir, struct qstr *name)
 296 {
 297         struct nfs_diropargs    arg = {
 298                 .fh             = NFS_FH(dir),
 299                 .name           = name->name,
 300                 .len            = name->len
 301         };
 302         struct rpc_message      msg = {
 303                 .rpc_proc       = &nfs_procedures[NFSPROC_REMOVE],
 304                 .rpc_argp       = &arg,
 305                 .rpc_resp       = NULL,
 306                 .rpc_cred       = NULL
 307         };
 308         int                     status;
 309
 310         dprintk("NFS call  remove %s\n", name->name);
 311         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 312         nfs_mark_for_revalidate(dir);
 313
 314         dprintk("NFS reply remove: %d\n", status);
 315         return status;
 316 }
 317
 318 static int
 319 nfs_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
 320 {
 321         struct nfs_diropargs    *arg;
 322
 323         arg = (struct nfs_diropargs *)kmalloc(sizeof(*arg), GFP_KERNEL);
 324         if (!arg)
 325                 return -ENOMEM;
 326         arg->fh = NFS_FH(dir->d_inode);
 327         arg->name = name->name;
 328         arg->len = name->len;
 329         msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
 330         msg->rpc_argp = arg;
 331         return 0;
 332 }
 333
 334 static int
 335 nfs_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
 336 {
 337         struct rpc_message *msg = &task->tk_msg;
 338
 339         if (msg->rpc_argp) {
 340                 nfs_mark_for_revalidate(dir->d_inode);
 341                 kfree(msg->rpc_argp);
 342         }
 343         return 0;
 344 }
 345
 346 static int
 347 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name,
 348                 struct inode *new_dir, struct qstr *new_name)
 349 {
 350         struct nfs_renameargs   arg = {
 351                 .fromfh         = NFS_FH(old_dir),
 352                 .fromname       = old_name->name,
 353                 .fromlen        = old_name->len,
 354                 .tofh           = NFS_FH(new_dir),
 355                 .toname         = new_name->name,
 356                 .tolen          = new_name->len
 357         };
 358         int                     status;
 359
 360         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 361         status = rpc_call(NFS_CLIENT(old_dir), NFSPROC_RENAME, &arg, NULL, 0);
 362         nfs_mark_for_revalidate(old_dir);
 363         nfs_mark_for_revalidate(new_dir);
 364         dprintk("NFS reply rename: %d\n", status);
 365         return status;
 366 }
 367
 368 static int
 369 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 370 {
 371         struct nfs_linkargs     arg = {
 372                 .fromfh         = NFS_FH(inode),
 373                 .tofh           = NFS_FH(dir),
 374                 .toname         = name->name,
 375                 .tolen          = name->len
 376         };
 377         int                     status;
 378
 379         dprintk("NFS call  link %s\n", name->name);
 380         status = rpc_call(NFS_CLIENT(inode), NFSPROC_LINK, &arg, NULL, 0);
 381         nfs_mark_for_revalidate(inode);
 382         nfs_mark_for_revalidate(dir);
 383         dprintk("NFS reply link: %d\n", status);
 384         return status;
 385 }
 386
 387 static int
 388 nfs_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
 389                  struct iattr *sattr, struct nfs_fh *fhandle,
 390                  struct nfs_fattr *fattr)
 391 {
 392         struct nfs_symlinkargs  arg = {
 393                 .fromfh         = NFS_FH(dir),
 394                 .fromname       = name->name,
 395                 .fromlen        = name->len,
 396                 .topath         = path->name,
 397                 .tolen          = path->len,
 398                 .sattr          = sattr
 399         };
 400         int                     status;
 401
 402         if (path->len > NFS2_MAXPATHLEN)
 403                 return -ENAMETOOLONG;
 404         dprintk("NFS call  symlink %s -> %s\n", name->name, path->name);
 405         nfs_fattr_init(fattr);
 406         fhandle->size = 0;
 407         status = rpc_call(NFS_CLIENT(dir), NFSPROC_SYMLINK, &arg, NULL, 0);
 408         nfs_mark_for_revalidate(dir);
 409         dprintk("NFS reply symlink: %d\n", status);
 410         return status;
 411 }
 412
 413 static int
 414 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 415 {
 416         struct nfs_fh fhandle;
 417         struct nfs_fattr fattr;
 418         struct nfs_createargs   arg = {
 419                 .fh             = NFS_FH(dir),
 420                 .name           = dentry->d_name.name,
 421                 .len            = dentry->d_name.len,
 422                 .sattr          = sattr
 423         };
 424         struct nfs_diropok      res = {
 425                 .fh             = &fhandle,
 426                 .fattr          = &fattr
 427         };
 428         int                     status;
 429
 430         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 431         nfs_fattr_init(&fattr);
 432         status = rpc_call(NFS_CLIENT(dir), NFSPROC_MKDIR, &arg, &res, 0);
 433         nfs_mark_for_revalidate(dir);
 434         if (status == 0)
 435                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 436         dprintk("NFS reply mkdir: %d\n", status);
 437         return status;
 438 }
 439
 440 static int
 441 nfs_proc_rmdir(struct inode *dir, struct qstr *name)
 442 {
 443         struct nfs_diropargs    arg = {
 444                 .fh             = NFS_FH(dir),
 445                 .name           = name->name,
 446                 .len            = name->len
 447         };
 448         int                     status;
 449
 450         dprintk("NFS call  rmdir %s\n", name->name);
 451         status = rpc_call(NFS_CLIENT(dir), NFSPROC_RMDIR, &arg, NULL, 0);
 452         nfs_mark_for_revalidate(dir);
 453         dprintk("NFS reply rmdir: %d\n", status);
 454         return status;
 455 }
 456
 457 /*
 458  * The READDIR implementation is somewhat hackish - we pass a temporary
 459  * buffer to the encode function, which installs it in the receive
 460  * the receive iovec. The decode function just parses the reply to make
 461  * sure it is syntactically correct; the entries itself are decoded
 462  * from nfs_readdir by calling the decode_entry function directly.
 463  */
 464 static int
 465 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 466                  u64 cookie, struct page *page, unsigned int count, int plus)
 467 {
 468         struct inode            *dir = dentry->d_inode;
 469         struct nfs_readdirargs  arg = {
 470                 .fh             = NFS_FH(dir),
 471                 .cookie         = cookie,
 472                 .count          = count,
 473                 .pages          = &page
 474         };
 475         struct rpc_message      msg = {
 476                 .rpc_proc       = &nfs_procedures[NFSPROC_READDIR],
 477                 .rpc_argp       = &arg,
 478                 .rpc_resp       = NULL,
 479                 .rpc_cred       = cred
 480         };
 481         int                     status;
 482
 483         lock_kernel();
 484
 485         dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
 486         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 487
 488         dprintk("NFS reply readdir: %d\n", status);
 489         unlock_kernel();
 490         return status;
 491 }
 492
 493 static int
 494 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 495                         struct nfs_fsstat *stat)
 496 {
 497         struct nfs2_fsstat fsinfo;
 498         int     status;
 499
 500         dprintk("NFS call  statfs\n");
 501         nfs_fattr_init(stat->fattr);
 502         status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0);
 503         dprintk("NFS reply statfs: %d\n", status);
 504         if (status)
 505                 goto out;
 506         stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
 507         stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
 508         stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
 509         stat->tfiles = 0;
 510         stat->ffiles = 0;
 511         stat->afiles = 0;
 512 out:
 513         return status;
 514 }
 515
 516 static int
 517 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 518                         struct nfs_fsinfo *info)
 519 {
 520         struct nfs2_fsstat fsinfo;
 521         int     status;
 522
 523         dprintk("NFS call  fsinfo\n");
 524         nfs_fattr_init(info->fattr);
 525         status = rpc_call(server->client, NFSPROC_STATFS, fhandle, &fsinfo, 0);
 526         dprintk("NFS reply fsinfo: %d\n", status);
 527         if (status)
 528                 goto out;
 529         info->rtmax  = NFS_MAXDATA;
 530         info->rtpref = fsinfo.tsize;
 531         info->rtmult = fsinfo.bsize;
 532         info->wtmax  = NFS_MAXDATA;
 533         info->wtpref = fsinfo.tsize;
 534         info->wtmult = fsinfo.bsize;
 535         info->dtpref = fsinfo.tsize;
 536         info->maxfilesize = 0x7FFFFFFF;
 537         info->lease_time = 0;
 538 out:
 539         return status;
 540 }
 541
 542 static int
 543 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 544                   struct nfs_pathconf *info)
 545 {
 546         info->max_link = 0;
 547         info->max_namelen = NFS2_MAXNAMLEN;
 548         return 0;
 549 }
 550
 551 extern u32 * nfs_decode_dirent(u32 *, struct nfs_entry *, int);
 552
 553 static void nfs_read_done(struct rpc_task *task, void *calldata)
 554 {
 555         struct nfs_read_data *data = calldata;
 556
 557         if (task->tk_status >= 0) {
 558                 nfs_refresh_inode(data->inode, data->res.fattr);
 559                 /* Emulate the eof flag, which isn't normally needed in NFSv2
 560                  * as it is guaranteed to always return the file attributes
 561                  */
 562                 if (data->args.offset + data->args.count >= data->res.fattr->size)
 563                         data->res.eof = 1;
 564         }
 565         nfs_readpage_result(task, calldata);
 566 }
 567
 568 static const struct rpc_call_ops nfs_read_ops = {
 569         .rpc_call_done = nfs_read_done,
 570         .rpc_release = nfs_readdata_release,
 571 };
 572
 573 static void
 574 nfs_proc_read_setup(struct nfs_read_data *data)
 575 {
 576         struct rpc_task         *task = &data->task;
 577         struct inode            *inode = data->inode;
 578         int                     flags;
 579         struct rpc_message      msg = {
 580                 .rpc_proc       = &nfs_procedures[NFSPROC_READ],
 581                 .rpc_argp       = &data->args,
 582                 .rpc_resp       = &data->res,
 583                 .rpc_cred       = data->cred,
 584         };
 585
 586         /* N.B. Do we need to test? Never called for swapfile inode */
 587         flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
 588
 589         /* Finalize the task. */
 590         rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_read_ops, data);
 591         rpc_call_setup(task, &msg, 0);
 592 }
 593
 594 static void nfs_write_done(struct rpc_task *task, void *calldata)
 595 {
 596         struct nfs_write_data *data = calldata;
 597
 598         if (task->tk_status >= 0)
 599                 nfs_post_op_update_inode(data->inode, data->res.fattr);
 600         nfs_writeback_done(task, calldata);
 601 }
 602
 603 static const struct rpc_call_ops nfs_write_ops = {
 604         .rpc_call_done = nfs_write_done,
 605         .rpc_release = nfs_writedata_release,
 606 };
 607
 608 static void
 609 nfs_proc_write_setup(struct nfs_write_data *data, int how)
 610 {
 611         struct rpc_task         *task = &data->task;
 612         struct inode            *inode = data->inode;
 613         int                     flags;
 614         struct rpc_message      msg = {
 615                 .rpc_proc       = &nfs_procedures[NFSPROC_WRITE],
 616                 .rpc_argp       = &data->args,
 617                 .rpc_resp       = &data->res,
 618                 .rpc_cred       = data->cred,
 619         };
 620
 621         /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
 622         data->args.stable = NFS_FILE_SYNC;
 623
 624         /* Set the initial flags for the task.  */
 625         flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 626
 627         /* Finalize the task. */
 628         rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs_write_ops, data);
 629         rpc_call_setup(task, &msg, 0);
 630 }
 631
 632 static void
 633 nfs_proc_commit_setup(struct nfs_write_data *data, int how)
 634 {
 635         BUG();
 636 }
 637
 638 static int
 639 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 640 {
 641         return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
 642 }
 643
 644
 645 struct nfs_rpc_ops      nfs_v2_clientops = {
 646         .version        = 2,                   /* protocol version */
 647         .dentry_ops     = &nfs_dentry_operations,
 648         .dir_inode_ops  = &nfs_dir_inode_operations,
 649         .file_inode_ops = &nfs_file_inode_operations,
 650         .getroot        = nfs_proc_get_root,
 651         .getattr        = nfs_proc_getattr,
 652         .setattr        = nfs_proc_setattr,
 653         .lookup         = nfs_proc_lookup,
 654         .access         = NULL,                /* access */
 655         .readlink       = nfs_proc_readlink,
 656         .read           = nfs_proc_read,
 657         .write          = nfs_proc_write,
 658         .commit         = NULL,                /* commit */
 659         .create         = nfs_proc_create,
 660         .remove         = nfs_proc_remove,
 661         .unlink_setup   = nfs_proc_unlink_setup,
 662         .unlink_done    = nfs_proc_unlink_done,
 663         .rename         = nfs_proc_rename,
 664         .link           = nfs_proc_link,
 665         .symlink        = nfs_proc_symlink,
 666         .mkdir          = nfs_proc_mkdir,
 667         .rmdir          = nfs_proc_rmdir,
 668         .readdir        = nfs_proc_readdir,
 669         .mknod          = nfs_proc_mknod,
 670         .statfs         = nfs_proc_statfs,
 671         .fsinfo         = nfs_proc_fsinfo,
 672         .pathconf       = nfs_proc_pathconf,
 673         .decode_dirent  = nfs_decode_dirent,
 674         .read_setup     = nfs_proc_read_setup,
 675         .write_setup    = nfs_proc_write_setup,
 676         .commit_setup   = nfs_proc_commit_setup,
 677         .file_open      = nfs_open,
 678         .file_release   = nfs_release,
 679         .lock           = nfs_proc_lock,
 680 };