fs/nfs/nfs3proc.c

   1 /*
   2  *  linux/fs/nfs/nfs3proc.c
   3  *
   4  *  Client-side NFSv3 procedures stubs.
   5  *
   6  *  Copyright (C) 1997, Olaf Kirch
   7  */
   8
   9 #include <linux/mm.h>
  10 #include <linux/utsname.h>
  11 #include <linux/errno.h>
  12 #include <linux/string.h>
  13 #include <linux/sunrpc/clnt.h>
  14 #include <linux/nfs.h>
  15 #include <linux/nfs3.h>
  16 #include <linux/nfs_fs.h>
  17 #include <linux/nfs_page.h>
  18 #include <linux/smp_lock.h>
  19
  20 #define NFSDBG_FACILITY         NFSDBG_PROC
  21
  22 extern struct rpc_procinfo nfs3_procedures[];
  23
  24 /* A wrapper to handle the EJUKEBOX error message */
  25 static int
  26 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  27 {
  28         sigset_t oldset;
  29         int res;
  30         rpc_clnt_sigmask(clnt, &oldset);
  31         do {
  32                 res = rpc_call_sync(clnt, msg, flags);
  33                 if (res != -EJUKEBOX)
  34                         break;
  35                 set_current_state(TASK_INTERRUPTIBLE);
  36                 schedule_timeout(NFS_JUKEBOX_RETRY_TIME);
  37                 res = -ERESTARTSYS;
  38         } while (!signalled());
  39         rpc_clnt_sigunmask(clnt, &oldset);
  40         return res;
  41 }
  42
  43 static inline int
  44 nfs3_rpc_call_wrapper(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags)
  45 {
  46         struct rpc_message msg = {
  47                 .rpc_proc       = &nfs3_procedures[proc],
  48                 .rpc_argp       = argp,
  49                 .rpc_resp       = resp,
  50         };
  51         return nfs3_rpc_wrapper(clnt, &msg, flags);
  52 }
  53
  54 #define rpc_call(clnt, proc, argp, resp, flags) \
  55                 nfs3_rpc_call_wrapper(clnt, proc, argp, resp, flags)
  56 #define rpc_call_sync(clnt, msg, flags) \
  57                 nfs3_rpc_wrapper(clnt, msg, flags)
  58
  59 static int
  60 nfs3_async_handle_jukebox(struct rpc_task *task)
  61 {
  62         if (task->tk_status != -EJUKEBOX)
  63                 return 0;
  64         task->tk_status = 0;
  65         rpc_restart_call(task);
  66         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  67         return 1;
  68 }
  69
  70 /*
  71  * Bare-bones access to getattr: this is for nfs_read_super.
  72  */
  73 static int
  74 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  75                    struct nfs_fattr *fattr)
  76 {
  77         int     status;
  78
  79         dprintk("NFS call  getroot\n");
  80         fattr->valid = 0;
  81         status = rpc_call(server->client, NFS3PROC_GETATTR, fhandle, fattr, 0);
  82         dprintk("NFS reply getroot\n");
  83         return status;
  84 }
  85
  86 /*
  87  * One function for each procedure in the NFS protocol.
  88  */
  89 static int
  90 nfs3_proc_getattr(struct inode *inode, struct nfs_fattr *fattr)
  91 {
  92         int     status;
  93
  94         dprintk("NFS call  getattr\n");
  95         fattr->valid = 0;
  96         status = rpc_call(NFS_CLIENT(inode), NFS3PROC_GETATTR,
  97                           NFS_FH(inode), fattr, 0);
  98         dprintk("NFS reply getattr\n");
  99         return status;
 100 }
 101
 102 static int
 103 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 104                         struct iattr *sattr)
 105 {
 106         struct inode *inode = dentry->d_inode;
 107         struct nfs3_sattrargs   arg = {
 108                 .fh             = NFS_FH(inode),
 109                 .sattr          = sattr,
 110         };
 111         int     status;
 112
 113         dprintk("NFS call  setattr\n");
 114         fattr->valid = 0;
 115         status = rpc_call(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, 0);
 116         dprintk("NFS reply setattr\n");
 117         return status;
 118 }
 119
 120 static int
 121 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 122                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 123 {
 124         struct nfs_fattr        dir_attr;
 125         struct nfs3_diropargs   arg = {
 126                 .fh             = NFS_FH(dir),
 127                 .name           = name->name,
 128                 .len            = name->len
 129         };
 130         struct nfs3_diropres    res = {
 131                 .dir_attr       = &dir_attr,
 132                 .fh             = fhandle,
 133                 .fattr          = fattr
 134         };
 135         int                     status;
 136
 137         dprintk("NFS call  lookup %s\n", name->name);
 138         dir_attr.valid = 0;
 139         fattr->valid = 0;
 140         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, 0);
 141         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR))
 142                 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_GETATTR,
 143                          fhandle, fattr, 0);
 144         dprintk("NFS reply lookup: %d\n", status);
 145         if (status >= 0)
 146                 status = nfs_refresh_inode(dir, &dir_attr);
 147         return status;
 148 }
 149
 150 static int
 151 nfs3_proc_access(struct inode *inode, struct rpc_cred *cred, int mode)
 152 {
 153         struct nfs_fattr        fattr;
 154         struct nfs3_accessargs  arg = {
 155                 .fh             = NFS_FH(inode),
 156         };
 157         struct nfs3_accessres   res = {
 158                 .fattr          = &fattr,
 159         };
 160         struct rpc_message msg = {
 161                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 162                 .rpc_argp       = &arg,
 163                 .rpc_resp       = &res,
 164                 .rpc_cred       = cred
 165         };
 166         int     status;
 167
 168         dprintk("NFS call  access\n");
 169         fattr.valid = 0;
 170
 171         if (mode & MAY_READ)
 172                 arg.access |= NFS3_ACCESS_READ;
 173         if (S_ISDIR(inode->i_mode)) {
 174                 if (mode & MAY_WRITE)
 175                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 176                 if (mode & MAY_EXEC)
 177                         arg.access |= NFS3_ACCESS_LOOKUP;
 178         } else {
 179                 if (mode & MAY_WRITE)
 180                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 181                 if (mode & MAY_EXEC)
 182                         arg.access |= NFS3_ACCESS_EXECUTE;
 183         }
 184         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 185         nfs_refresh_inode(inode, &fattr);
 186         dprintk("NFS reply access\n");
 187
 188         if (status == 0 && (arg.access & res.access) != arg.access)
 189                 status = -EACCES;
 190         return status;
 191 }
 192
 193 static int
 194 nfs3_proc_readlink(struct inode *inode, struct page *page)
 195 {
 196         struct nfs_fattr        fattr;
 197         struct nfs3_readlinkargs args = {
 198                 .fh             = NFS_FH(inode),
 199                 .count          = PAGE_CACHE_SIZE,
 200                 .pages          = &page
 201         };
 202         int                     status;
 203
 204         dprintk("NFS call  readlink\n");
 205         fattr.valid = 0;
 206         status = rpc_call(NFS_CLIENT(inode), NFS3PROC_READLINK,
 207                           &args, &fattr, 0);
 208         nfs_refresh_inode(inode, &fattr);
 209         dprintk("NFS reply readlink: %d\n", status);
 210         return status;
 211 }
 212
 213 static int
 214 nfs3_proc_read(struct inode *inode, struct rpc_cred *cred,
 215                struct nfs_fattr *fattr, int flags,
 216                unsigned int base, unsigned int count, struct page *page,
 217                int *eofp)
 218 {
 219         u64                     offset = page_offset(page) + base;
 220         struct nfs_readargs     arg = {
 221                 .fh             = NFS_FH(inode),
 222                 .offset         = offset,
 223                 .count          = count,
 224                 .pgbase         = base,
 225                 .pages          = &page
 226         };
 227         struct nfs_readres      res = {
 228                 .fattr          = fattr,
 229                 .count          = count,
 230         };
 231         struct rpc_message      msg = {
 232                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
 233                 .rpc_argp       = &arg,
 234                 .rpc_resp       = &res,
 235                 .rpc_cred       = cred
 236         };
 237         int                     status;
 238
 239         dprintk("NFS call  read %d @ %Ld\n", count, (long long)offset);
 240         fattr->valid = 0;
 241         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 242         dprintk("NFS reply read: %d\n", status);
 243         *eofp = res.eof;
 244         return status;
 245 }
 246
 247 static int
 248 nfs3_proc_write(struct inode *inode, struct rpc_cred *cred,
 249                 struct nfs_fattr *fattr, int flags,
 250                 unsigned int base, unsigned int count,
 251                 struct page *page, struct nfs_writeverf *verf)
 252 {
 253         u64                     offset = page_offset(page) + base;
 254         struct nfs_writeargs    arg = {
 255                 .fh             = NFS_FH(inode),
 256                 .offset         = offset,
 257                 .count          = count,
 258                 .stable         = NFS_FILE_SYNC,
 259                 .pgbase         = base,
 260                 .pages          = &page
 261         };
 262         struct nfs_writeres     res = {
 263                 .fattr          = fattr,
 264                 .verf           = verf,
 265         };
 266         struct rpc_message      msg = {
 267                 .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
 268                 .rpc_argp       = &arg,
 269                 .rpc_resp       = &res,
 270                 .rpc_cred       = cred
 271         };
 272         int                     status, rpcflags = 0;
 273
 274         dprintk("NFS call  write %d @ %Ld\n", count, (long long)offset);
 275         fattr->valid = 0;
 276         if (flags & NFS_RW_SWAP)
 277                 rpcflags |= NFS_RPC_SWAPFLAGS;
 278         arg.stable = (flags & NFS_RW_SYNC) ? NFS_FILE_SYNC : NFS_UNSTABLE;
 279
 280         status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags);
 281
 282         dprintk("NFS reply read: %d\n", status);
 283         return status < 0? status : res.count;
 284 }
 285
 286 /*
 287  * Create a regular file.
 288  * For now, we don't implement O_EXCL.
 289  */
 290 static int
 291 nfs3_proc_create(struct inode *dir, struct qstr *name, struct iattr *sattr,
 292                  int flags, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 293 {
 294         struct nfs_fattr        dir_attr;
 295         struct nfs3_createargs  arg = {
 296                 .fh             = NFS_FH(dir),
 297                 .name           = name->name,
 298                 .len            = name->len,
 299                 .sattr          = sattr,
 300         };
 301         struct nfs3_diropres    res = {
 302                 .dir_attr       = &dir_attr,
 303                 .fh             = fhandle,
 304                 .fattr          = fattr
 305         };
 306         int                     status;
 307
 308         dprintk("NFS call  create %s\n", name->name);
 309         arg.createmode = NFS3_CREATE_UNCHECKED;
 310         if (flags & O_EXCL) {
 311                 arg.createmode  = NFS3_CREATE_EXCLUSIVE;
 312                 arg.verifier[0] = jiffies;
 313                 arg.verifier[1] = current->pid;
 314         }
 315
 316 again:
 317         dir_attr.valid = 0;
 318         fattr->valid = 0;
 319         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0);
 320         nfs_refresh_inode(dir, &dir_attr);
 321
 322         /* If the server doesn't support the exclusive creation semantics,
 323          * try again with simple 'guarded' mode. */
 324         if (status == NFSERR_NOTSUPP) {
 325                 switch (arg.createmode) {
 326                         case NFS3_CREATE_EXCLUSIVE:
 327                                 arg.createmode = NFS3_CREATE_GUARDED;
 328                                 break;
 329
 330                         case NFS3_CREATE_GUARDED:
 331                                 arg.createmode = NFS3_CREATE_UNCHECKED;
 332                                 break;
 333
 334                         case NFS3_CREATE_UNCHECKED:
 335                                 goto exit;
 336                 }
 337                 goto again;
 338         }
 339
 340 exit:
 341         dprintk("NFS reply create: %d\n", status);
 342
 343         /* When we created the file with exclusive semantics, make
 344          * sure we set the attributes afterwards. */
 345         if (status == 0 && arg.createmode == NFS3_CREATE_EXCLUSIVE) {
 346                 struct nfs3_sattrargs   arg = {
 347                         .fh             = fhandle,
 348                         .sattr          = sattr,
 349                 };
 350                 dprintk("NFS call  setattr (post-create)\n");
 351
 352                 /* Note: we could use a guarded setattr here, but I'm
 353                  * not sure this buys us anything (and I'd have
 354                  * to revamp the NFSv3 XDR code) */
 355                 fattr->valid = 0;
 356                 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SETATTR,
 357                                                 &arg, fattr, 0);
 358                 dprintk("NFS reply setattr (post-create): %d\n", status);
 359         }
 360
 361         return status;
 362 }
 363
 364 static int
 365 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 366 {
 367         struct nfs_fattr        dir_attr;
 368         struct nfs3_diropargs   arg = {
 369                 .fh             = NFS_FH(dir),
 370                 .name           = name->name,
 371                 .len            = name->len
 372         };
 373         struct rpc_message      msg = {
 374                 .rpc_proc       = &nfs3_procedures[NFS3PROC_REMOVE],
 375                 .rpc_argp       = &arg,
 376                 .rpc_resp       = &dir_attr,
 377         };
 378         int                     status;
 379
 380         dprintk("NFS call  remove %s\n", name->name);
 381         dir_attr.valid = 0;
 382         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 383         nfs_refresh_inode(dir, &dir_attr);
 384         dprintk("NFS reply remove: %d\n", status);
 385         return status;
 386 }
 387
 388 static int
 389 nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
 390 {
 391         struct nfs3_diropargs   *arg;
 392         struct nfs_fattr        *res;
 393
 394         arg = (struct nfs3_diropargs *)kmalloc(sizeof(*arg)+sizeof(*res), GFP_KERNEL);
 395         if (!arg)
 396                 return -ENOMEM;
 397         res = (struct nfs_fattr*)(arg + 1);
 398         arg->fh = NFS_FH(dir->d_inode);
 399         arg->name = name->name;
 400         arg->len = name->len;
 401         res->valid = 0;
 402         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 403         msg->rpc_argp = arg;
 404         msg->rpc_resp = res;
 405         return 0;
 406 }
 407
 408 static int
 409 nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
 410 {
 411         struct rpc_message *msg = &task->tk_msg;
 412         struct nfs_fattr        *dir_attr;
 413
 414         if (nfs3_async_handle_jukebox(task))
 415                 return 1;
 416         if (msg->rpc_argp) {
 417                 dir_attr = (struct nfs_fattr*)msg->rpc_resp;
 418                 nfs_refresh_inode(dir->d_inode, dir_attr);
 419                 kfree(msg->rpc_argp);
 420         }
 421         return 0;
 422 }
 423
 424 static int
 425 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 426                  struct inode *new_dir, struct qstr *new_name)
 427 {
 428         struct nfs_fattr        old_dir_attr, new_dir_attr;
 429         struct nfs3_renameargs  arg = {
 430                 .fromfh         = NFS_FH(old_dir),
 431                 .fromname       = old_name->name,
 432                 .fromlen        = old_name->len,
 433                 .tofh           = NFS_FH(new_dir),
 434                 .toname         = new_name->name,
 435                 .tolen          = new_name->len
 436         };
 437         struct nfs3_renameres   res = {
 438                 .fromattr       = &old_dir_attr,
 439                 .toattr         = &new_dir_attr
 440         };
 441         int                     status;
 442
 443         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 444         old_dir_attr.valid = 0;
 445         new_dir_attr.valid = 0;
 446         status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0);
 447         nfs_refresh_inode(old_dir, &old_dir_attr);
 448         nfs_refresh_inode(new_dir, &new_dir_attr);
 449         dprintk("NFS reply rename: %d\n", status);
 450         return status;
 451 }
 452
 453 static int
 454 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 455 {
 456         struct nfs_fattr        dir_attr, fattr;
 457         struct nfs3_linkargs    arg = {
 458                 .fromfh         = NFS_FH(inode),
 459                 .tofh           = NFS_FH(dir),
 460                 .toname         = name->name,
 461                 .tolen          = name->len
 462         };
 463         struct nfs3_linkres     res = {
 464                 .dir_attr       = &dir_attr,
 465                 .fattr          = &fattr
 466         };
 467         int                     status;
 468
 469         dprintk("NFS call  link %s\n", name->name);
 470         dir_attr.valid = 0;
 471         fattr.valid = 0;
 472         status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0);
 473         nfs_refresh_inode(dir, &dir_attr);
 474         nfs_refresh_inode(inode, &fattr);
 475         dprintk("NFS reply link: %d\n", status);
 476         return status;
 477 }
 478
 479 static int
 480 nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
 481                   struct iattr *sattr, struct nfs_fh *fhandle,
 482                   struct nfs_fattr *fattr)
 483 {
 484         struct nfs_fattr        dir_attr;
 485         struct nfs3_symlinkargs arg = {
 486                 .fromfh         = NFS_FH(dir),
 487                 .fromname       = name->name,
 488                 .fromlen        = name->len,
 489                 .topath         = path->name,
 490                 .tolen          = path->len,
 491                 .sattr          = sattr
 492         };
 493         struct nfs3_diropres    res = {
 494                 .dir_attr       = &dir_attr,
 495                 .fh             = fhandle,
 496                 .fattr          = fattr
 497         };
 498         int                     status;
 499
 500         dprintk("NFS call  symlink %s -> %s\n", name->name, path->name);
 501         dir_attr.valid = 0;
 502         fattr->valid = 0;
 503         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0);
 504         nfs_refresh_inode(dir, &dir_attr);
 505         dprintk("NFS reply symlink: %d\n", status);
 506         return status;
 507 }
 508
 509 static int
 510 nfs3_proc_mkdir(struct inode *dir, struct qstr *name, struct iattr *sattr,
 511                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 512 {
 513         struct nfs_fattr        dir_attr;
 514         struct nfs3_mkdirargs   arg = {
 515                 .fh             = NFS_FH(dir),
 516                 .name           = name->name,
 517                 .len            = name->len,
 518                 .sattr          = sattr
 519         };
 520         struct nfs3_diropres    res = {
 521                 .dir_attr       = &dir_attr,
 522                 .fh             = fhandle,
 523                 .fattr          = fattr
 524         };
 525         int                     status;
 526
 527         dprintk("NFS call  mkdir %s\n", name->name);
 528         dir_attr.valid = 0;
 529         fattr->valid = 0;
 530         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0);
 531         nfs_refresh_inode(dir, &dir_attr);
 532         dprintk("NFS reply mkdir: %d\n", status);
 533         return status;
 534 }
 535
 536 static int
 537 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 538 {
 539         struct nfs_fattr        dir_attr;
 540         struct nfs3_diropargs   arg = {
 541                 .fh             = NFS_FH(dir),
 542                 .name           = name->name,
 543                 .len            = name->len
 544         };
 545         int                     status;
 546
 547         dprintk("NFS call  rmdir %s\n", name->name);
 548         dir_attr.valid = 0;
 549         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0);
 550         nfs_refresh_inode(dir, &dir_attr);
 551         dprintk("NFS reply rmdir: %d\n", status);
 552         return status;
 553 }
 554
 555 /*
 556  * The READDIR implementation is somewhat hackish - we pass the user buffer
 557  * to the encode function, which installs it in the receive iovec.
 558  * The decode function itself doesn't perform any decoding, it just makes
 559  * sure the reply is syntactically correct.
 560  *
 561  * Also note that this implementation handles both plain readdir and
 562  * readdirplus.
 563  */
 564 static int
 565 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 566                   u64 cookie, struct page *page, unsigned int count, int plus)
 567 {
 568         struct inode            *dir = dentry->d_inode;
 569         struct nfs_fattr        dir_attr;
 570         u32                     *verf = NFS_COOKIEVERF(dir);
 571         struct nfs3_readdirargs arg = {
 572                 .fh             = NFS_FH(dir),
 573                 .cookie         = cookie,
 574                 .verf           = {verf[0], verf[1]},
 575                 .plus           = plus,
 576                 .count          = count,
 577                 .pages          = &page
 578         };
 579         struct nfs3_readdirres  res = {
 580                 .dir_attr       = &dir_attr,
 581                 .verf           = verf,
 582                 .plus           = plus
 583         };
 584         struct rpc_message      msg = {
 585                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 586                 .rpc_argp       = &arg,
 587                 .rpc_resp       = &res,
 588                 .rpc_cred       = cred
 589         };
 590         int                     status;
 591
 592         lock_kernel();
 593
 594         if (plus)
 595                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 596
 597         dprintk("NFS call  readdir%s %d\n",
 598                         plus? "plus" : "", (unsigned int) cookie);
 599
 600         dir_attr.valid = 0;
 601         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 602         nfs_refresh_inode(dir, &dir_attr);
 603         dprintk("NFS reply readdir: %d\n", status);
 604         unlock_kernel();
 605         return status;
 606 }
 607
 608 static int
 609 nfs3_proc_mknod(struct inode *dir, struct qstr *name, struct iattr *sattr,
 610                 dev_t rdev, struct nfs_fh *fh, struct nfs_fattr *fattr)
 611 {
 612         struct nfs_fattr        dir_attr;
 613         struct nfs3_mknodargs   arg = {
 614                 .fh             = NFS_FH(dir),
 615                 .name           = name->name,
 616                 .len            = name->len,
 617                 .sattr          = sattr,
 618                 .rdev           = rdev
 619         };
 620         struct nfs3_diropres    res = {
 621                 .dir_attr       = &dir_attr,
 622                 .fh             = fh,
 623                 .fattr          = fattr
 624         };
 625         int                     status;
 626
 627         switch (sattr->ia_mode & S_IFMT) {
 628         case S_IFBLK:   arg.type = NF3BLK;  break;
 629         case S_IFCHR:   arg.type = NF3CHR;  break;
 630         case S_IFIFO:   arg.type = NF3FIFO; break;
 631         case S_IFSOCK:  arg.type = NF3SOCK; break;
 632         default:        return -EINVAL;
 633         }
 634
 635         dprintk("NFS call  mknod %s %x\n", name->name, rdev);
 636         dir_attr.valid = 0;
 637         fattr->valid = 0;
 638         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0);
 639         nfs_refresh_inode(dir, &dir_attr);
 640         dprintk("NFS reply mknod: %d\n", status);
 641         return status;
 642 }
 643
 644 static int
 645 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 646                  struct nfs_fsstat *stat)
 647 {
 648         int     status;
 649
 650         dprintk("NFS call  fsstat\n");
 651         stat->fattr->valid = 0;
 652         status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, stat, 0);
 653         dprintk("NFS reply statfs: %d\n", status);
 654         return status;
 655 }
 656
 657 static int
 658 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 659                  struct nfs_fsinfo *info)
 660 {
 661         int     status;
 662
 663         dprintk("NFS call  fsinfo\n");
 664         info->fattr->valid = 0;
 665         status = rpc_call(server->client, NFS3PROC_FSINFO, fhandle, info, 0);
 666         dprintk("NFS reply fsinfo: %d\n", status);
 667         return status;
 668 }
 669
 670 static int
 671 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 672                    struct nfs_pathconf *info)
 673 {
 674         int     status;
 675
 676         dprintk("NFS call  pathconf\n");
 677         info->fattr->valid = 0;
 678         status = rpc_call(server->client, NFS3PROC_PATHCONF, fhandle, info, 0);
 679         dprintk("NFS reply pathconf: %d\n", status);
 680         return status;
 681 }
 682
 683 extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
 684
 685 static void
 686 nfs3_read_done(struct rpc_task *task)
 687 {
 688         struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
 689
 690         if (nfs3_async_handle_jukebox(task))
 691                 return;
 692         nfs_readpage_result(task, data->u.v3.res.count, data->u.v3.res.eof);
 693 }
 694
 695 static void
 696 nfs3_proc_read_setup(struct nfs_read_data *data, unsigned int count)
 697 {
 698         struct rpc_task         *task = &data->task;
 699         struct inode            *inode = data->inode;
 700         struct nfs_page         *req;
 701         int                     flags;
 702         struct rpc_message      msg = {
 703                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
 704                 .rpc_argp       = &data->u.v3.args,
 705                 .rpc_resp       = &data->u.v3.res,
 706                 .rpc_cred       = data->cred,
 707         };
 708
 709         req = nfs_list_entry(data->pages.next);
 710         data->u.v3.args.fh     = NFS_FH(inode);
 711         data->u.v3.args.offset = req_offset(req) + req->wb_offset;
 712         data->u.v3.args.pgbase = req->wb_offset;
 713         data->u.v3.args.pages  = data->pagevec;
 714         data->u.v3.args.count  = count;
 715         data->u.v3.res.fattr   = &data->fattr;
 716         data->u.v3.res.count   = count;
 717         data->u.v3.res.eof     = 0;
 718
 719         /* N.B. Do we need to test? Never called for swapfile inode */
 720         flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
 721
 722         /* Finalize the task. */
 723         rpc_init_task(task, NFS_CLIENT(inode), nfs3_read_done, flags);
 724         task->tk_calldata = data;
 725         /* Release requests */
 726         task->tk_release = nfs_readdata_release;
 727
 728         rpc_call_setup(&data->task, &msg, 0);
 729 }
 730
 731 static void
 732 nfs3_write_done(struct rpc_task *task)
 733 {
 734         struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
 735
 736         if (nfs3_async_handle_jukebox(task))
 737                 return;
 738         nfs_writeback_done(task, data->u.v3.args.stable,
 739                            data->u.v3.args.count, data->u.v3.res.count);
 740 }
 741
 742 static void
 743 nfs3_proc_write_setup(struct nfs_write_data *data, unsigned int count, int how)
 744 {
 745         struct rpc_task         *task = &data->task;
 746         struct inode            *inode = data->inode;
 747         struct nfs_page         *req;
 748         int                     stable;
 749         int                     flags;
 750         struct rpc_message      msg = {
 751                 .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
 752                 .rpc_argp       = &data->u.v3.args,
 753                 .rpc_resp       = &data->u.v3.res,
 754                 .rpc_cred       = data->cred,
 755         };
 756
 757         if (how & FLUSH_STABLE) {
 758                 if (!NFS_I(inode)->ncommit)
 759                         stable = NFS_FILE_SYNC;
 760                 else
 761                         stable = NFS_DATA_SYNC;
 762         } else
 763                 stable = NFS_UNSTABLE;
 764
 765         req = nfs_list_entry(data->pages.next);
 766         data->u.v3.args.fh     = NFS_FH(inode);
 767         data->u.v3.args.offset = req_offset(req) + req->wb_offset;
 768         data->u.v3.args.pgbase = req->wb_offset;
 769         data->u.v3.args.count  = count;
 770         data->u.v3.args.stable = stable;
 771         data->u.v3.args.pages  = data->pagevec;
 772         data->u.v3.res.fattr   = &data->fattr;
 773         data->u.v3.res.count   = count;
 774         data->u.v3.res.verf    = &data->verf;
 775
 776         /* Set the initial flags for the task.  */
 777         flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 778
 779         /* Finalize the task. */
 780         rpc_init_task(task, NFS_CLIENT(inode), nfs3_write_done, flags);
 781         task->tk_calldata = data;
 782         /* Release requests */
 783         task->tk_release = nfs_writedata_release;
 784
 785         rpc_call_setup(&data->task, &msg, 0);
 786 }
 787
 788 static void
 789 nfs3_commit_done(struct rpc_task *task)
 790 {
 791         if (nfs3_async_handle_jukebox(task))
 792                 return;
 793         nfs_commit_done(task);
 794 }
 795
 796 static void
 797 nfs3_proc_commit_setup(struct nfs_write_data *data, u64 start, u32 len, int how)
 798 {
 799         struct rpc_task         *task = &data->task;
 800         struct inode            *inode = data->inode;
 801         int                     flags;
 802         struct rpc_message      msg = {
 803                 .rpc_proc       = &nfs3_procedures[NFS3PROC_COMMIT],
 804                 .rpc_argp       = &data->u.v3.args,
 805                 .rpc_resp       = &data->u.v3.res,
 806                 .rpc_cred       = data->cred,
 807         };
 808
 809         data->u.v3.args.fh     = NFS_FH(data->inode);
 810         data->u.v3.args.offset = start;
 811         data->u.v3.args.count  = len;
 812         data->u.v3.res.count   = len;
 813         data->u.v3.res.fattr   = &data->fattr;
 814         data->u.v3.res.verf    = &data->verf;
 815
 816         /* Set the initial flags for the task.  */
 817         flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 818
 819         /* Finalize the task. */
 820         rpc_init_task(task, NFS_CLIENT(inode), nfs3_commit_done, flags);
 821         task->tk_calldata = data;
 822         /* Release requests */
 823         task->tk_release = nfs_commit_release;
 824
 825         rpc_call_setup(&data->task, &msg, 0);
 826 }
 827
 828 struct nfs_rpc_ops      nfs_v3_clientops = {
 829         .version        = 3,                    /* protocol version */
 830         .getroot        = nfs3_proc_get_root,
 831         .getattr        = nfs3_proc_getattr,
 832         .setattr        = nfs3_proc_setattr,
 833         .lookup         = nfs3_proc_lookup,
 834         .access         = nfs3_proc_access,
 835         .readlink       = nfs3_proc_readlink,
 836         .read           = nfs3_proc_read,
 837         .write          = nfs3_proc_write,
 838         .create         = nfs3_proc_create,
 839         .remove         = nfs3_proc_remove,
 840         .unlink_setup   = nfs3_proc_unlink_setup,
 841         .unlink_done    = nfs3_proc_unlink_done,
 842         .rename         = nfs3_proc_rename,
 843         .link           = nfs3_proc_link,
 844         .symlink        = nfs3_proc_symlink,
 845         .mkdir          = nfs3_proc_mkdir,
 846         .rmdir          = nfs3_proc_rmdir,
 847         .readdir        = nfs3_proc_readdir,
 848         .mknod          = nfs3_proc_mknod,
 849         .statfs         = nfs3_proc_statfs,
 850         .fsinfo         = nfs3_proc_fsinfo,
 851         .pathconf       = nfs3_proc_pathconf,
 852         .decode_dirent  = nfs3_decode_dirent,
 853         .read_setup     = nfs3_proc_read_setup,
 854         .write_setup    = nfs3_proc_write_setup,
 855         .commit_setup   = nfs3_proc_commit_setup,
 856 };