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/lockd/bind.h>
  19 #include <linux/smp_lock.h>
  20 #include <linux/nfs_mount.h>
  21
  22 #include "iostat.h"
  23 #include "internal.h"
  24
  25 #define NFSDBG_FACILITY         NFSDBG_PROC
  26
  27 /* A wrapper to handle the EJUKEBOX error message */
  28 static int
  29 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  30 {
  31         sigset_t oldset;
  32         int res;
  33         rpc_clnt_sigmask(clnt, &oldset);
  34         do {
  35                 res = rpc_call_sync(clnt, msg, flags);
  36                 if (res != -EJUKEBOX)
  37                         break;
  38                 schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME);
  39                 res = -ERESTARTSYS;
  40         } while (!signalled());
  41         rpc_clnt_sigunmask(clnt, &oldset);
  42         return res;
  43 }
  44
  45 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  46
  47 static int
  48 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  49 {
  50         if (task->tk_status != -EJUKEBOX)
  51                 return 0;
  52         nfs_inc_stats(inode, NFSIOS_DELAY);
  53         task->tk_status = 0;
  54         rpc_restart_call(task);
  55         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  56         return 1;
  57 }
  58
  59 static int
  60 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  61                  struct nfs_fsinfo *info)
  62 {
  63         struct rpc_message msg = {
  64                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  65                 .rpc_argp       = fhandle,
  66                 .rpc_resp       = info,
  67         };
  68         int     status;
  69
  70         dprintk("%s: call  fsinfo\n", __FUNCTION__);
  71         nfs_fattr_init(info->fattr);
  72         status = rpc_call_sync(client, &msg, 0);
  73         dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status);
  74         if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  75                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  76                 msg.rpc_resp = info->fattr;
  77                 status = rpc_call_sync(client, &msg, 0);
  78                 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
  79         }
  80         return status;
  81 }
  82
  83 /*
  84  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  85  */
  86 static int
  87 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  88                    struct nfs_fsinfo *info)
  89 {
  90         int     status;
  91
  92         status = do_proc_get_root(server->client, fhandle, info);
  93         if (status && server->nfs_client->cl_rpcclient != server->client)
  94                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  95         return status;
  96 }
  97
  98 /*
  99  * One function for each procedure in the NFS protocol.
 100  */
 101 static int
 102 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 103                 struct nfs_fattr *fattr)
 104 {
 105         struct rpc_message msg = {
 106                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 107                 .rpc_argp       = fhandle,
 108                 .rpc_resp       = fattr,
 109         };
 110         int     status;
 111
 112         dprintk("NFS call  getattr\n");
 113         nfs_fattr_init(fattr);
 114         status = rpc_call_sync(server->client, &msg, 0);
 115         dprintk("NFS reply getattr: %d\n", status);
 116         return status;
 117 }
 118
 119 static int
 120 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 121                         struct iattr *sattr)
 122 {
 123         struct inode *inode = dentry->d_inode;
 124         struct nfs3_sattrargs   arg = {
 125                 .fh             = NFS_FH(inode),
 126                 .sattr          = sattr,
 127         };
 128         struct rpc_message msg = {
 129                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 130                 .rpc_argp       = &arg,
 131                 .rpc_resp       = fattr,
 132         };
 133         int     status;
 134
 135         dprintk("NFS call  setattr\n");
 136         nfs_fattr_init(fattr);
 137         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 138         if (status == 0)
 139                 nfs_setattr_update_inode(inode, sattr);
 140         dprintk("NFS reply setattr: %d\n", status);
 141         return status;
 142 }
 143
 144 static int
 145 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 146                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 147 {
 148         struct nfs_fattr        dir_attr;
 149         struct nfs3_diropargs   arg = {
 150                 .fh             = NFS_FH(dir),
 151                 .name           = name->name,
 152                 .len            = name->len
 153         };
 154         struct nfs3_diropres    res = {
 155                 .dir_attr       = &dir_attr,
 156                 .fh             = fhandle,
 157                 .fattr          = fattr
 158         };
 159         struct rpc_message msg = {
 160                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 161                 .rpc_argp       = &arg,
 162                 .rpc_resp       = &res,
 163         };
 164         int                     status;
 165
 166         dprintk("NFS call  lookup %s\n", name->name);
 167         nfs_fattr_init(&dir_attr);
 168         nfs_fattr_init(fattr);
 169         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 170         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 171                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 172                 msg.rpc_argp = fhandle;
 173                 msg.rpc_resp = fattr;
 174                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 175         }
 176         dprintk("NFS reply lookup: %d\n", status);
 177         if (status >= 0)
 178                 status = nfs_refresh_inode(dir, &dir_attr);
 179         return status;
 180 }
 181
 182 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 183 {
 184         struct nfs_fattr        fattr;
 185         struct nfs3_accessargs  arg = {
 186                 .fh             = NFS_FH(inode),
 187         };
 188         struct nfs3_accessres   res = {
 189                 .fattr          = &fattr,
 190         };
 191         struct rpc_message msg = {
 192                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 193                 .rpc_argp       = &arg,
 194                 .rpc_resp       = &res,
 195                 .rpc_cred       = entry->cred,
 196         };
 197         int mode = entry->mask;
 198         int status;
 199
 200         dprintk("NFS call  access\n");
 201
 202         if (mode & MAY_READ)
 203                 arg.access |= NFS3_ACCESS_READ;
 204         if (S_ISDIR(inode->i_mode)) {
 205                 if (mode & MAY_WRITE)
 206                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 207                 if (mode & MAY_EXEC)
 208                         arg.access |= NFS3_ACCESS_LOOKUP;
 209         } else {
 210                 if (mode & MAY_WRITE)
 211                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 212                 if (mode & MAY_EXEC)
 213                         arg.access |= NFS3_ACCESS_EXECUTE;
 214         }
 215         nfs_fattr_init(&fattr);
 216         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 217         nfs_refresh_inode(inode, &fattr);
 218         if (status == 0) {
 219                 entry->mask = 0;
 220                 if (res.access & NFS3_ACCESS_READ)
 221                         entry->mask |= MAY_READ;
 222                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 223                         entry->mask |= MAY_WRITE;
 224                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 225                         entry->mask |= MAY_EXEC;
 226         }
 227         dprintk("NFS reply access: %d\n", status);
 228         return status;
 229 }
 230
 231 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 232                 unsigned int pgbase, unsigned int pglen)
 233 {
 234         struct nfs_fattr        fattr;
 235         struct nfs3_readlinkargs args = {
 236                 .fh             = NFS_FH(inode),
 237                 .pgbase         = pgbase,
 238                 .pglen          = pglen,
 239                 .pages          = &page
 240         };
 241         struct rpc_message msg = {
 242                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 243                 .rpc_argp       = &args,
 244                 .rpc_resp       = &fattr,
 245         };
 246         int                     status;
 247
 248         dprintk("NFS call  readlink\n");
 249         nfs_fattr_init(&fattr);
 250         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 251         nfs_refresh_inode(inode, &fattr);
 252         dprintk("NFS reply readlink: %d\n", status);
 253         return status;
 254 }
 255
 256 static int nfs3_proc_read(struct nfs_read_data *rdata)
 257 {
 258         int                     flags = rdata->flags;
 259         struct inode *          inode = rdata->inode;
 260         struct nfs_fattr *      fattr = rdata->res.fattr;
 261         struct rpc_message      msg = {
 262                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
 263                 .rpc_argp       = &rdata->args,
 264                 .rpc_resp       = &rdata->res,
 265                 .rpc_cred       = rdata->cred,
 266         };
 267         int                     status;
 268
 269         dprintk("NFS call  read %d @ %Ld\n", rdata->args.count,
 270                         (long long) rdata->args.offset);
 271         nfs_fattr_init(fattr);
 272         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 273         if (status >= 0)
 274                 nfs_refresh_inode(inode, fattr);
 275         dprintk("NFS reply read: %d\n", status);
 276         return status;
 277 }
 278
 279 /*
 280  * Create a regular file.
 281  * For now, we don't implement O_EXCL.
 282  */
 283 static int
 284 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 285                  int flags, struct nameidata *nd)
 286 {
 287         struct nfs_fh           fhandle;
 288         struct nfs_fattr        fattr;
 289         struct nfs_fattr        dir_attr;
 290         struct nfs3_createargs  arg = {
 291                 .fh             = NFS_FH(dir),
 292                 .name           = dentry->d_name.name,
 293                 .len            = dentry->d_name.len,
 294                 .sattr          = sattr,
 295         };
 296         struct nfs3_diropres    res = {
 297                 .dir_attr       = &dir_attr,
 298                 .fh             = &fhandle,
 299                 .fattr          = &fattr
 300         };
 301         struct rpc_message msg = {
 302                 .rpc_proc       = &nfs3_procedures[NFS3PROC_CREATE],
 303                 .rpc_argp       = &arg,
 304                 .rpc_resp       = &res,
 305         };
 306         mode_t mode = sattr->ia_mode;
 307         int status;
 308
 309         dprintk("NFS call  create %s\n", dentry->d_name.name);
 310         arg.createmode = NFS3_CREATE_UNCHECKED;
 311         if (flags & O_EXCL) {
 312                 arg.createmode  = NFS3_CREATE_EXCLUSIVE;
 313                 arg.verifier[0] = jiffies;
 314                 arg.verifier[1] = current->pid;
 315         }
 316
 317         sattr->ia_mode &= ~current->fs->umask;
 318
 319 again:
 320         nfs_fattr_init(&dir_attr);
 321         nfs_fattr_init(&fattr);
 322         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 323         nfs_refresh_inode(dir, &dir_attr);
 324
 325         /* If the server doesn't support the exclusive creation semantics,
 326          * try again with simple 'guarded' mode. */
 327         if (status == -ENOTSUPP) {
 328                 switch (arg.createmode) {
 329                         case NFS3_CREATE_EXCLUSIVE:
 330                                 arg.createmode = NFS3_CREATE_GUARDED;
 331                                 break;
 332
 333                         case NFS3_CREATE_GUARDED:
 334                                 arg.createmode = NFS3_CREATE_UNCHECKED;
 335                                 break;
 336
 337                         case NFS3_CREATE_UNCHECKED:
 338                                 goto out;
 339                 }
 340                 goto again;
 341         }
 342
 343         if (status == 0)
 344                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 345         if (status != 0)
 346                 goto out;
 347
 348         /* When we created the file with exclusive semantics, make
 349          * sure we set the attributes afterwards. */
 350         if (arg.createmode == NFS3_CREATE_EXCLUSIVE) {
 351                 dprintk("NFS call  setattr (post-create)\n");
 352
 353                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 354                         sattr->ia_valid |= ATTR_ATIME;
 355                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 356                         sattr->ia_valid |= ATTR_MTIME;
 357
 358                 /* Note: we could use a guarded setattr here, but I'm
 359                  * not sure this buys us anything (and I'd have
 360                  * to revamp the NFSv3 XDR code) */
 361                 status = nfs3_proc_setattr(dentry, &fattr, sattr);
 362                 if (status == 0)
 363                         nfs_setattr_update_inode(dentry->d_inode, sattr);
 364                 nfs_refresh_inode(dentry->d_inode, &fattr);
 365                 dprintk("NFS reply setattr (post-create): %d\n", status);
 366         }
 367         if (status != 0)
 368                 goto out;
 369         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 370 out:
 371         dprintk("NFS reply create: %d\n", status);
 372         return status;
 373 }
 374
 375 static int
 376 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 377 {
 378         struct nfs_fattr        dir_attr;
 379         struct nfs3_diropargs   arg = {
 380                 .fh             = NFS_FH(dir),
 381                 .name           = name->name,
 382                 .len            = name->len
 383         };
 384         struct rpc_message      msg = {
 385                 .rpc_proc       = &nfs3_procedures[NFS3PROC_REMOVE],
 386                 .rpc_argp       = &arg,
 387                 .rpc_resp       = &dir_attr,
 388         };
 389         int                     status;
 390
 391         dprintk("NFS call  remove %s\n", name->name);
 392         nfs_fattr_init(&dir_attr);
 393         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 394         nfs_post_op_update_inode(dir, &dir_attr);
 395         dprintk("NFS reply remove: %d\n", status);
 396         return status;
 397 }
 398
 399 static int
 400 nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
 401 {
 402         struct unlinkxdr {
 403                 struct nfs3_diropargs arg;
 404                 struct nfs_fattr res;
 405         } *ptr;
 406
 407         ptr = kmalloc(sizeof(*ptr), GFP_KERNEL);
 408         if (!ptr)
 409                 return -ENOMEM;
 410         ptr->arg.fh = NFS_FH(dir->d_inode);
 411         ptr->arg.name = name->name;
 412         ptr->arg.len = name->len;
 413         nfs_fattr_init(&ptr->res);
 414         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 415         msg->rpc_argp = &ptr->arg;
 416         msg->rpc_resp = &ptr->res;
 417         return 0;
 418 }
 419
 420 static int
 421 nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
 422 {
 423         struct rpc_message *msg = &task->tk_msg;
 424         struct nfs_fattr        *dir_attr;
 425
 426         if (nfs3_async_handle_jukebox(task, dir->d_inode))
 427                 return 1;
 428         if (msg->rpc_argp) {
 429                 dir_attr = (struct nfs_fattr*)msg->rpc_resp;
 430                 nfs_post_op_update_inode(dir->d_inode, dir_attr);
 431                 kfree(msg->rpc_argp);
 432         }
 433         return 0;
 434 }
 435
 436 static int
 437 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 438                  struct inode *new_dir, struct qstr *new_name)
 439 {
 440         struct nfs_fattr        old_dir_attr, new_dir_attr;
 441         struct nfs3_renameargs  arg = {
 442                 .fromfh         = NFS_FH(old_dir),
 443                 .fromname       = old_name->name,
 444                 .fromlen        = old_name->len,
 445                 .tofh           = NFS_FH(new_dir),
 446                 .toname         = new_name->name,
 447                 .tolen          = new_name->len
 448         };
 449         struct nfs3_renameres   res = {
 450                 .fromattr       = &old_dir_attr,
 451                 .toattr         = &new_dir_attr
 452         };
 453         struct rpc_message msg = {
 454                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 455                 .rpc_argp       = &arg,
 456                 .rpc_resp       = &res,
 457         };
 458         int                     status;
 459
 460         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 461         nfs_fattr_init(&old_dir_attr);
 462         nfs_fattr_init(&new_dir_attr);
 463         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 464         nfs_post_op_update_inode(old_dir, &old_dir_attr);
 465         nfs_post_op_update_inode(new_dir, &new_dir_attr);
 466         dprintk("NFS reply rename: %d\n", status);
 467         return status;
 468 }
 469
 470 static int
 471 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 472 {
 473         struct nfs_fattr        dir_attr, fattr;
 474         struct nfs3_linkargs    arg = {
 475                 .fromfh         = NFS_FH(inode),
 476                 .tofh           = NFS_FH(dir),
 477                 .toname         = name->name,
 478                 .tolen          = name->len
 479         };
 480         struct nfs3_linkres     res = {
 481                 .dir_attr       = &dir_attr,
 482                 .fattr          = &fattr
 483         };
 484         struct rpc_message msg = {
 485                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 486                 .rpc_argp       = &arg,
 487                 .rpc_resp       = &res,
 488         };
 489         int                     status;
 490
 491         dprintk("NFS call  link %s\n", name->name);
 492         nfs_fattr_init(&dir_attr);
 493         nfs_fattr_init(&fattr);
 494         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 495         nfs_post_op_update_inode(dir, &dir_attr);
 496         nfs_post_op_update_inode(inode, &fattr);
 497         dprintk("NFS reply link: %d\n", status);
 498         return status;
 499 }
 500
 501 static int
 502 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 503                   unsigned int len, struct iattr *sattr)
 504 {
 505         struct nfs_fh fhandle;
 506         struct nfs_fattr fattr, dir_attr;
 507         struct nfs3_symlinkargs arg = {
 508                 .fromfh         = NFS_FH(dir),
 509                 .fromname       = dentry->d_name.name,
 510                 .fromlen        = dentry->d_name.len,
 511                 .pages          = &page,
 512                 .pathlen        = len,
 513                 .sattr          = sattr
 514         };
 515         struct nfs3_diropres    res = {
 516                 .dir_attr       = &dir_attr,
 517                 .fh             = &fhandle,
 518                 .fattr          = &fattr
 519         };
 520         struct rpc_message msg = {
 521                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SYMLINK],
 522                 .rpc_argp       = &arg,
 523                 .rpc_resp       = &res,
 524         };
 525         int                     status;
 526
 527         if (len > NFS3_MAXPATHLEN)
 528                 return -ENAMETOOLONG;
 529
 530         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 531
 532         nfs_fattr_init(&dir_attr);
 533         nfs_fattr_init(&fattr);
 534         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 535         nfs_post_op_update_inode(dir, &dir_attr);
 536         if (status != 0)
 537                 goto out;
 538         status = nfs_instantiate(dentry, &fhandle, &fattr);
 539 out:
 540         dprintk("NFS reply symlink: %d\n", status);
 541         return status;
 542 }
 543
 544 static int
 545 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 546 {
 547         struct nfs_fh fhandle;
 548         struct nfs_fattr fattr, dir_attr;
 549         struct nfs3_mkdirargs   arg = {
 550                 .fh             = NFS_FH(dir),
 551                 .name           = dentry->d_name.name,
 552                 .len            = dentry->d_name.len,
 553                 .sattr          = sattr
 554         };
 555         struct nfs3_diropres    res = {
 556                 .dir_attr       = &dir_attr,
 557                 .fh             = &fhandle,
 558                 .fattr          = &fattr
 559         };
 560         struct rpc_message msg = {
 561                 .rpc_proc       = &nfs3_procedures[NFS3PROC_MKDIR],
 562                 .rpc_argp       = &arg,
 563                 .rpc_resp       = &res,
 564         };
 565         int mode = sattr->ia_mode;
 566         int status;
 567
 568         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 569
 570         sattr->ia_mode &= ~current->fs->umask;
 571
 572         nfs_fattr_init(&dir_attr);
 573         nfs_fattr_init(&fattr);
 574         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 575         nfs_post_op_update_inode(dir, &dir_attr);
 576         if (status != 0)
 577                 goto out;
 578         status = nfs_instantiate(dentry, &fhandle, &fattr);
 579         if (status != 0)
 580                 goto out;
 581         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 582 out:
 583         dprintk("NFS reply mkdir: %d\n", status);
 584         return status;
 585 }
 586
 587 static int
 588 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 589 {
 590         struct nfs_fattr        dir_attr;
 591         struct nfs3_diropargs   arg = {
 592                 .fh             = NFS_FH(dir),
 593                 .name           = name->name,
 594                 .len            = name->len
 595         };
 596         struct rpc_message msg = {
 597                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 598                 .rpc_argp       = &arg,
 599                 .rpc_resp       = &dir_attr,
 600         };
 601         int                     status;
 602
 603         dprintk("NFS call  rmdir %s\n", name->name);
 604         nfs_fattr_init(&dir_attr);
 605         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 606         nfs_post_op_update_inode(dir, &dir_attr);
 607         dprintk("NFS reply rmdir: %d\n", status);
 608         return status;
 609 }
 610
 611 /*
 612  * The READDIR implementation is somewhat hackish - we pass the user buffer
 613  * to the encode function, which installs it in the receive iovec.
 614  * The decode function itself doesn't perform any decoding, it just makes
 615  * sure the reply is syntactically correct.
 616  *
 617  * Also note that this implementation handles both plain readdir and
 618  * readdirplus.
 619  */
 620 static int
 621 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 622                   u64 cookie, struct page *page, unsigned int count, int plus)
 623 {
 624         struct inode            *dir = dentry->d_inode;
 625         struct nfs_fattr        dir_attr;
 626         __be32                  *verf = NFS_COOKIEVERF(dir);
 627         struct nfs3_readdirargs arg = {
 628                 .fh             = NFS_FH(dir),
 629                 .cookie         = cookie,
 630                 .verf           = {verf[0], verf[1]},
 631                 .plus           = plus,
 632                 .count          = count,
 633                 .pages          = &page
 634         };
 635         struct nfs3_readdirres  res = {
 636                 .dir_attr       = &dir_attr,
 637                 .verf           = verf,
 638                 .plus           = plus
 639         };
 640         struct rpc_message      msg = {
 641                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 642                 .rpc_argp       = &arg,
 643                 .rpc_resp       = &res,
 644                 .rpc_cred       = cred
 645         };
 646         int                     status;
 647
 648         if (plus)
 649                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 650
 651         dprintk("NFS call  readdir%s %d\n",
 652                         plus? "plus" : "", (unsigned int) cookie);
 653
 654         nfs_fattr_init(&dir_attr);
 655         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 656         nfs_refresh_inode(dir, &dir_attr);
 657         dprintk("NFS reply readdir: %d\n", status);
 658         return status;
 659 }
 660
 661 static int
 662 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 663                 dev_t rdev)
 664 {
 665         struct nfs_fh fh;
 666         struct nfs_fattr fattr, dir_attr;
 667         struct nfs3_mknodargs   arg = {
 668                 .fh             = NFS_FH(dir),
 669                 .name           = dentry->d_name.name,
 670                 .len            = dentry->d_name.len,
 671                 .sattr          = sattr,
 672                 .rdev           = rdev
 673         };
 674         struct nfs3_diropres    res = {
 675                 .dir_attr       = &dir_attr,
 676                 .fh             = &fh,
 677                 .fattr          = &fattr
 678         };
 679         struct rpc_message msg = {
 680                 .rpc_proc       = &nfs3_procedures[NFS3PROC_MKNOD],
 681                 .rpc_argp       = &arg,
 682                 .rpc_resp       = &res,
 683         };
 684         mode_t mode = sattr->ia_mode;
 685         int status;
 686
 687         switch (sattr->ia_mode & S_IFMT) {
 688         case S_IFBLK:   arg.type = NF3BLK;  break;
 689         case S_IFCHR:   arg.type = NF3CHR;  break;
 690         case S_IFIFO:   arg.type = NF3FIFO; break;
 691         case S_IFSOCK:  arg.type = NF3SOCK; break;
 692         default:        return -EINVAL;
 693         }
 694
 695         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 696                         MAJOR(rdev), MINOR(rdev));
 697
 698         sattr->ia_mode &= ~current->fs->umask;
 699
 700         nfs_fattr_init(&dir_attr);
 701         nfs_fattr_init(&fattr);
 702         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 703         nfs_post_op_update_inode(dir, &dir_attr);
 704         if (status != 0)
 705                 goto out;
 706         status = nfs_instantiate(dentry, &fh, &fattr);
 707         if (status != 0)
 708                 goto out;
 709         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 710 out:
 711         dprintk("NFS reply mknod: %d\n", status);
 712         return status;
 713 }
 714
 715 static int
 716 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 717                  struct nfs_fsstat *stat)
 718 {
 719         struct rpc_message msg = {
 720                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 721                 .rpc_argp       = fhandle,
 722                 .rpc_resp       = stat,
 723         };
 724         int     status;
 725
 726         dprintk("NFS call  fsstat\n");
 727         nfs_fattr_init(stat->fattr);
 728         status = rpc_call_sync(server->client, &msg, 0);
 729         dprintk("NFS reply statfs: %d\n", status);
 730         return status;
 731 }
 732
 733 static int
 734 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 735                  struct nfs_fsinfo *info)
 736 {
 737         struct rpc_message msg = {
 738                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 739                 .rpc_argp       = fhandle,
 740                 .rpc_resp       = info,
 741         };
 742         int     status;
 743
 744         dprintk("NFS call  fsinfo\n");
 745         nfs_fattr_init(info->fattr);
 746         status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
 747         dprintk("NFS reply fsinfo: %d\n", status);
 748         return status;
 749 }
 750
 751 static int
 752 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 753                    struct nfs_pathconf *info)
 754 {
 755         struct rpc_message msg = {
 756                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 757                 .rpc_argp       = fhandle,
 758                 .rpc_resp       = info,
 759         };
 760         int     status;
 761
 762         dprintk("NFS call  pathconf\n");
 763         nfs_fattr_init(info->fattr);
 764         status = rpc_call_sync(server->client, &msg, 0);
 765         dprintk("NFS reply pathconf: %d\n", status);
 766         return status;
 767 }
 768
 769 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 770 {
 771         if (nfs3_async_handle_jukebox(task, data->inode))
 772                 return -EAGAIN;
 773         /* Call back common NFS readpage processing */
 774         if (task->tk_status >= 0)
 775                 nfs_refresh_inode(data->inode, &data->fattr);
 776         return 0;
 777 }
 778
 779 static void nfs3_proc_read_setup(struct nfs_read_data *data)
 780 {
 781         struct rpc_message      msg = {
 782                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
 783                 .rpc_argp       = &data->args,
 784                 .rpc_resp       = &data->res,
 785                 .rpc_cred       = data->cred,
 786         };
 787
 788         rpc_call_setup(&data->task, &msg, 0);
 789 }
 790
 791 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 792 {
 793         if (nfs3_async_handle_jukebox(task, data->inode))
 794                 return -EAGAIN;
 795         if (task->tk_status >= 0)
 796                 nfs_post_op_update_inode(data->inode, data->res.fattr);
 797         return 0;
 798 }
 799
 800 static void nfs3_proc_write_setup(struct nfs_write_data *data, int how)
 801 {
 802         struct rpc_message      msg = {
 803                 .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
 804                 .rpc_argp       = &data->args,
 805                 .rpc_resp       = &data->res,
 806                 .rpc_cred       = data->cred,
 807         };
 808
 809         data->args.stable = NFS_UNSTABLE;
 810         if (how & FLUSH_STABLE) {
 811                 data->args.stable = NFS_FILE_SYNC;
 812                 if (NFS_I(data->inode)->ncommit)
 813                         data->args.stable = NFS_DATA_SYNC;
 814         }
 815
 816         /* Finalize the task. */
 817         rpc_call_setup(&data->task, &msg, 0);
 818 }
 819
 820 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 821 {
 822         if (nfs3_async_handle_jukebox(task, data->inode))
 823                 return -EAGAIN;
 824         if (task->tk_status >= 0)
 825                 nfs_post_op_update_inode(data->inode, data->res.fattr);
 826         return 0;
 827 }
 828
 829 static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
 830 {
 831         struct rpc_message      msg = {
 832                 .rpc_proc       = &nfs3_procedures[NFS3PROC_COMMIT],
 833                 .rpc_argp       = &data->args,
 834                 .rpc_resp       = &data->res,
 835                 .rpc_cred       = data->cred,
 836         };
 837
 838         rpc_call_setup(&data->task, &msg, 0);
 839 }
 840
 841 static int
 842 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 843 {
 844         return nlmclnt_proc(filp->f_path.dentry->d_inode, cmd, fl);
 845 }
 846
 847 const struct nfs_rpc_ops nfs_v3_clientops = {
 848         .version        = 3,                    /* protocol version */
 849         .dentry_ops     = &nfs_dentry_operations,
 850         .dir_inode_ops  = &nfs3_dir_inode_operations,
 851         .file_inode_ops = &nfs3_file_inode_operations,
 852         .getroot        = nfs3_proc_get_root,
 853         .getattr        = nfs3_proc_getattr,
 854         .setattr        = nfs3_proc_setattr,
 855         .lookup         = nfs3_proc_lookup,
 856         .access         = nfs3_proc_access,
 857         .readlink       = nfs3_proc_readlink,
 858         .read           = nfs3_proc_read,
 859         .create         = nfs3_proc_create,
 860         .remove         = nfs3_proc_remove,
 861         .unlink_setup   = nfs3_proc_unlink_setup,
 862         .unlink_done    = nfs3_proc_unlink_done,
 863         .rename         = nfs3_proc_rename,
 864         .link           = nfs3_proc_link,
 865         .symlink        = nfs3_proc_symlink,
 866         .mkdir          = nfs3_proc_mkdir,
 867         .rmdir          = nfs3_proc_rmdir,
 868         .readdir        = nfs3_proc_readdir,
 869         .mknod          = nfs3_proc_mknod,
 870         .statfs         = nfs3_proc_statfs,
 871         .fsinfo         = nfs3_proc_fsinfo,
 872         .pathconf       = nfs3_proc_pathconf,
 873         .decode_dirent  = nfs3_decode_dirent,
 874         .read_setup     = nfs3_proc_read_setup,
 875         .read_done      = nfs3_read_done,
 876         .write_setup    = nfs3_proc_write_setup,
 877         .write_done     = nfs3_write_done,
 878         .commit_setup   = nfs3_proc_commit_setup,
 879         .commit_done    = nfs3_commit_done,
 880         .file_open      = nfs_open,
 881         .file_release   = nfs_release,
 882         .lock           = nfs3_proc_lock,
 883         .clear_acl_cache = nfs3_forget_cached_acls,
 884 };