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/nfs_mount.h>
  20
  21 #include "iostat.h"
  22 #include "internal.h"
  23
  24 #define NFSDBG_FACILITY         NFSDBG_PROC
  25
  26 /* A wrapper to handle the EJUKEBOX error message */
  27 static int
  28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  29 {
  30         int res;
  31         do {
  32                 res = rpc_call_sync(clnt, msg, flags);
  33                 if (res != -EJUKEBOX)
  34                         break;
  35                 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
  36                 res = -ERESTARTSYS;
  37         } while (!fatal_signal_pending(current));
  38         return res;
  39 }
  40
  41 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  42
  43 static int
  44 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  45 {
  46         if (task->tk_status != -EJUKEBOX)
  47                 return 0;
  48         nfs_inc_stats(inode, NFSIOS_DELAY);
  49         task->tk_status = 0;
  50         rpc_restart_call(task);
  51         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  52         return 1;
  53 }
  54
  55 static int
  56 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  57                  struct nfs_fsinfo *info)
  58 {
  59         struct rpc_message msg = {
  60                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  61                 .rpc_argp       = fhandle,
  62                 .rpc_resp       = info,
  63         };
  64         int     status;
  65
  66         dprintk("%s: call  fsinfo\n", __func__);
  67         nfs_fattr_init(info->fattr);
  68         status = rpc_call_sync(client, &msg, 0);
  69         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  70         if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  71                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  72                 msg.rpc_resp = info->fattr;
  73                 status = rpc_call_sync(client, &msg, 0);
  74                 dprintk("%s: reply getattr: %d\n", __func__, status);
  75         }
  76         return status;
  77 }
  78
  79 /*
  80  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  81  */
  82 static int
  83 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  84                    struct nfs_fsinfo *info)
  85 {
  86         int     status;
  87
  88         status = do_proc_get_root(server->client, fhandle, info);
  89         if (status && server->nfs_client->cl_rpcclient != server->client)
  90                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  91         return status;
  92 }
  93
  94 /*
  95  * One function for each procedure in the NFS protocol.
  96  */
  97 static int
  98 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
  99                 struct nfs_fattr *fattr)
 100 {
 101         struct rpc_message msg = {
 102                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 103                 .rpc_argp       = fhandle,
 104                 .rpc_resp       = fattr,
 105         };
 106         int     status;
 107
 108         dprintk("NFS call  getattr\n");
 109         nfs_fattr_init(fattr);
 110         status = rpc_call_sync(server->client, &msg, 0);
 111         dprintk("NFS reply getattr: %d\n", status);
 112         return status;
 113 }
 114
 115 static int
 116 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 117                         struct iattr *sattr)
 118 {
 119         struct inode *inode = dentry->d_inode;
 120         struct nfs3_sattrargs   arg = {
 121                 .fh             = NFS_FH(inode),
 122                 .sattr          = sattr,
 123         };
 124         struct rpc_message msg = {
 125                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 126                 .rpc_argp       = &arg,
 127                 .rpc_resp       = fattr,
 128         };
 129         int     status;
 130
 131         dprintk("NFS call  setattr\n");
 132         if (sattr->ia_valid & ATTR_FILE)
 133                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 134         nfs_fattr_init(fattr);
 135         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 136         if (status == 0)
 137                 nfs_setattr_update_inode(inode, sattr);
 138         dprintk("NFS reply setattr: %d\n", status);
 139         return status;
 140 }
 141
 142 static int
 143 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 144                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 145 {
 146         struct nfs_fattr        dir_attr;
 147         struct nfs3_diropargs   arg = {
 148                 .fh             = NFS_FH(dir),
 149                 .name           = name->name,
 150                 .len            = name->len
 151         };
 152         struct nfs3_diropres    res = {
 153                 .dir_attr       = &dir_attr,
 154                 .fh             = fhandle,
 155                 .fattr          = fattr
 156         };
 157         struct rpc_message msg = {
 158                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 159                 .rpc_argp       = &arg,
 160                 .rpc_resp       = &res,
 161         };
 162         int                     status;
 163
 164         dprintk("NFS call  lookup %s\n", name->name);
 165         nfs_fattr_init(&dir_attr);
 166         nfs_fattr_init(fattr);
 167         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 168         nfs_refresh_inode(dir, &dir_attr);
 169         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 170                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 171                 msg.rpc_argp = fhandle;
 172                 msg.rpc_resp = fattr;
 173                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 174         }
 175         dprintk("NFS reply lookup: %d\n", status);
 176         return status;
 177 }
 178
 179 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 180 {
 181         struct nfs_fattr        fattr;
 182         struct nfs3_accessargs  arg = {
 183                 .fh             = NFS_FH(inode),
 184         };
 185         struct nfs3_accessres   res = {
 186                 .fattr          = &fattr,
 187         };
 188         struct rpc_message msg = {
 189                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 190                 .rpc_argp       = &arg,
 191                 .rpc_resp       = &res,
 192                 .rpc_cred       = entry->cred,
 193         };
 194         int mode = entry->mask;
 195         int status;
 196
 197         dprintk("NFS call  access\n");
 198
 199         if (mode & MAY_READ)
 200                 arg.access |= NFS3_ACCESS_READ;
 201         if (S_ISDIR(inode->i_mode)) {
 202                 if (mode & MAY_WRITE)
 203                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 204                 if (mode & MAY_EXEC)
 205                         arg.access |= NFS3_ACCESS_LOOKUP;
 206         } else {
 207                 if (mode & MAY_WRITE)
 208                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 209                 if (mode & MAY_EXEC)
 210                         arg.access |= NFS3_ACCESS_EXECUTE;
 211         }
 212         nfs_fattr_init(&fattr);
 213         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 214         nfs_refresh_inode(inode, &fattr);
 215         if (status == 0) {
 216                 entry->mask = 0;
 217                 if (res.access & NFS3_ACCESS_READ)
 218                         entry->mask |= MAY_READ;
 219                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 220                         entry->mask |= MAY_WRITE;
 221                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 222                         entry->mask |= MAY_EXEC;
 223         }
 224         dprintk("NFS reply access: %d\n", status);
 225         return status;
 226 }
 227
 228 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 229                 unsigned int pgbase, unsigned int pglen)
 230 {
 231         struct nfs_fattr        fattr;
 232         struct nfs3_readlinkargs args = {
 233                 .fh             = NFS_FH(inode),
 234                 .pgbase         = pgbase,
 235                 .pglen          = pglen,
 236                 .pages          = &page
 237         };
 238         struct rpc_message msg = {
 239                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 240                 .rpc_argp       = &args,
 241                 .rpc_resp       = &fattr,
 242         };
 243         int                     status;
 244
 245         dprintk("NFS call  readlink\n");
 246         nfs_fattr_init(&fattr);
 247         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 248         nfs_refresh_inode(inode, &fattr);
 249         dprintk("NFS reply readlink: %d\n", status);
 250         return status;
 251 }
 252
 253 struct nfs3_createdata {
 254         struct rpc_message msg;
 255         union {
 256                 struct nfs3_createargs create;
 257                 struct nfs3_mkdirargs mkdir;
 258                 struct nfs3_symlinkargs symlink;
 259                 struct nfs3_mknodargs mknod;
 260         } arg;
 261         struct nfs3_diropres res;
 262         struct nfs_fh fh;
 263         struct nfs_fattr fattr;
 264         struct nfs_fattr dir_attr;
 265 };
 266
 267 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 268 {
 269         struct nfs3_createdata *data;
 270
 271         data = kzalloc(sizeof(*data), GFP_KERNEL);
 272         if (data != NULL) {
 273                 data->msg.rpc_argp = &data->arg;
 274                 data->msg.rpc_resp = &data->res;
 275                 data->res.fh = &data->fh;
 276                 data->res.fattr = &data->fattr;
 277                 data->res.dir_attr = &data->dir_attr;
 278                 nfs_fattr_init(data->res.fattr);
 279                 nfs_fattr_init(data->res.dir_attr);
 280         }
 281         return data;
 282 }
 283
 284 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 285 {
 286         int status;
 287
 288         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 289         nfs_post_op_update_inode(dir, data->res.dir_attr);
 290         if (status == 0)
 291                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
 292         return status;
 293 }
 294
 295 static void nfs3_free_createdata(struct nfs3_createdata *data)
 296 {
 297         kfree(data);
 298 }
 299
 300 /*
 301  * Create a regular file.
 302  * For now, we don't implement O_EXCL.
 303  */
 304 static int
 305 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 306                  int flags, struct nameidata *nd)
 307 {
 308         struct nfs3_createdata *data;
 309         mode_t mode = sattr->ia_mode;
 310         int status = -ENOMEM;
 311
 312         dprintk("NFS call  create %s\n", dentry->d_name.name);
 313
 314         data = nfs3_alloc_createdata();
 315         if (data == NULL)
 316                 goto out;
 317
 318         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 319         data->arg.create.fh = NFS_FH(dir);
 320         data->arg.create.name = dentry->d_name.name;
 321         data->arg.create.len = dentry->d_name.len;
 322         data->arg.create.sattr = sattr;
 323
 324         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 325         if (flags & O_EXCL) {
 326                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 327                 data->arg.create.verifier[0] = jiffies;
 328                 data->arg.create.verifier[1] = current->pid;
 329         }
 330
 331         sattr->ia_mode &= ~current_umask();
 332
 333         for (;;) {
 334                 status = nfs3_do_create(dir, dentry, data);
 335
 336                 if (status != -ENOTSUPP)
 337                         break;
 338                 /* If the server doesn't support the exclusive creation
 339                  * semantics, try again with simple 'guarded' mode. */
 340                 switch (data->arg.create.createmode) {
 341                         case NFS3_CREATE_EXCLUSIVE:
 342                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 343                                 break;
 344
 345                         case NFS3_CREATE_GUARDED:
 346                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 347                                 break;
 348
 349                         case NFS3_CREATE_UNCHECKED:
 350                                 goto out;
 351                 }
 352                 nfs_fattr_init(data->res.dir_attr);
 353                 nfs_fattr_init(data->res.fattr);
 354         }
 355
 356         if (status != 0)
 357                 goto out;
 358
 359         /* When we created the file with exclusive semantics, make
 360          * sure we set the attributes afterwards. */
 361         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 362                 dprintk("NFS call  setattr (post-create)\n");
 363
 364                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 365                         sattr->ia_valid |= ATTR_ATIME;
 366                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 367                         sattr->ia_valid |= ATTR_MTIME;
 368
 369                 /* Note: we could use a guarded setattr here, but I'm
 370                  * not sure this buys us anything (and I'd have
 371                  * to revamp the NFSv3 XDR code) */
 372                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 373                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 374                 dprintk("NFS reply setattr (post-create): %d\n", status);
 375                 if (status != 0)
 376                         goto out;
 377         }
 378         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 379 out:
 380         nfs3_free_createdata(data);
 381         dprintk("NFS reply create: %d\n", status);
 382         return status;
 383 }
 384
 385 static int
 386 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 387 {
 388         struct nfs_removeargs arg = {
 389                 .fh = NFS_FH(dir),
 390                 .name.len = name->len,
 391                 .name.name = name->name,
 392         };
 393         struct nfs_removeres res;
 394         struct rpc_message msg = {
 395                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 396                 .rpc_argp = &arg,
 397                 .rpc_resp = &res,
 398         };
 399         int                     status;
 400
 401         dprintk("NFS call  remove %s\n", name->name);
 402         nfs_fattr_init(&res.dir_attr);
 403         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 404         nfs_post_op_update_inode(dir, &res.dir_attr);
 405         dprintk("NFS reply remove: %d\n", status);
 406         return status;
 407 }
 408
 409 static void
 410 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 411 {
 412         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 413 }
 414
 415 static int
 416 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 417 {
 418         struct nfs_removeres *res;
 419         if (nfs3_async_handle_jukebox(task, dir))
 420                 return 0;
 421         res = task->tk_msg.rpc_resp;
 422         nfs_post_op_update_inode(dir, &res->dir_attr);
 423         return 1;
 424 }
 425
 426 static int
 427 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 428                  struct inode *new_dir, struct qstr *new_name)
 429 {
 430         struct nfs_fattr        old_dir_attr, new_dir_attr;
 431         struct nfs3_renameargs  arg = {
 432                 .fromfh         = NFS_FH(old_dir),
 433                 .fromname       = old_name->name,
 434                 .fromlen        = old_name->len,
 435                 .tofh           = NFS_FH(new_dir),
 436                 .toname         = new_name->name,
 437                 .tolen          = new_name->len
 438         };
 439         struct nfs3_renameres   res = {
 440                 .fromattr       = &old_dir_attr,
 441                 .toattr         = &new_dir_attr
 442         };
 443         struct rpc_message msg = {
 444                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 445                 .rpc_argp       = &arg,
 446                 .rpc_resp       = &res,
 447         };
 448         int                     status;
 449
 450         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 451         nfs_fattr_init(&old_dir_attr);
 452         nfs_fattr_init(&new_dir_attr);
 453         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 454         nfs_post_op_update_inode(old_dir, &old_dir_attr);
 455         nfs_post_op_update_inode(new_dir, &new_dir_attr);
 456         dprintk("NFS reply rename: %d\n", status);
 457         return status;
 458 }
 459
 460 static int
 461 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 462 {
 463         struct nfs_fattr        dir_attr, fattr;
 464         struct nfs3_linkargs    arg = {
 465                 .fromfh         = NFS_FH(inode),
 466                 .tofh           = NFS_FH(dir),
 467                 .toname         = name->name,
 468                 .tolen          = name->len
 469         };
 470         struct nfs3_linkres     res = {
 471                 .dir_attr       = &dir_attr,
 472                 .fattr          = &fattr
 473         };
 474         struct rpc_message msg = {
 475                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 476                 .rpc_argp       = &arg,
 477                 .rpc_resp       = &res,
 478         };
 479         int                     status;
 480
 481         dprintk("NFS call  link %s\n", name->name);
 482         nfs_fattr_init(&dir_attr);
 483         nfs_fattr_init(&fattr);
 484         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 485         nfs_post_op_update_inode(dir, &dir_attr);
 486         nfs_post_op_update_inode(inode, &fattr);
 487         dprintk("NFS reply link: %d\n", status);
 488         return status;
 489 }
 490
 491 static int
 492 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 493                   unsigned int len, struct iattr *sattr)
 494 {
 495         struct nfs3_createdata *data;
 496         int status = -ENOMEM;
 497
 498         if (len > NFS3_MAXPATHLEN)
 499                 return -ENAMETOOLONG;
 500
 501         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 502
 503         data = nfs3_alloc_createdata();
 504         if (data == NULL)
 505                 goto out;
 506         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 507         data->arg.symlink.fromfh = NFS_FH(dir);
 508         data->arg.symlink.fromname = dentry->d_name.name;
 509         data->arg.symlink.fromlen = dentry->d_name.len;
 510         data->arg.symlink.pages = &page;
 511         data->arg.symlink.pathlen = len;
 512         data->arg.symlink.sattr = sattr;
 513
 514         status = nfs3_do_create(dir, dentry, data);
 515
 516         nfs3_free_createdata(data);
 517 out:
 518         dprintk("NFS reply symlink: %d\n", status);
 519         return status;
 520 }
 521
 522 static int
 523 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 524 {
 525         struct nfs3_createdata *data;
 526         int mode = sattr->ia_mode;
 527         int status = -ENOMEM;
 528
 529         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 530
 531         sattr->ia_mode &= ~current_umask();
 532
 533         data = nfs3_alloc_createdata();
 534         if (data == NULL)
 535                 goto out;
 536
 537         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 538         data->arg.mkdir.fh = NFS_FH(dir);
 539         data->arg.mkdir.name = dentry->d_name.name;
 540         data->arg.mkdir.len = dentry->d_name.len;
 541         data->arg.mkdir.sattr = sattr;
 542
 543         status = nfs3_do_create(dir, dentry, data);
 544         if (status != 0)
 545                 goto out;
 546
 547         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 548 out:
 549         nfs3_free_createdata(data);
 550         dprintk("NFS reply mkdir: %d\n", status);
 551         return status;
 552 }
 553
 554 static int
 555 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 556 {
 557         struct nfs_fattr        dir_attr;
 558         struct nfs3_diropargs   arg = {
 559                 .fh             = NFS_FH(dir),
 560                 .name           = name->name,
 561                 .len            = name->len
 562         };
 563         struct rpc_message msg = {
 564                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 565                 .rpc_argp       = &arg,
 566                 .rpc_resp       = &dir_attr,
 567         };
 568         int                     status;
 569
 570         dprintk("NFS call  rmdir %s\n", name->name);
 571         nfs_fattr_init(&dir_attr);
 572         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 573         nfs_post_op_update_inode(dir, &dir_attr);
 574         dprintk("NFS reply rmdir: %d\n", status);
 575         return status;
 576 }
 577
 578 /*
 579  * The READDIR implementation is somewhat hackish - we pass the user buffer
 580  * to the encode function, which installs it in the receive iovec.
 581  * The decode function itself doesn't perform any decoding, it just makes
 582  * sure the reply is syntactically correct.
 583  *
 584  * Also note that this implementation handles both plain readdir and
 585  * readdirplus.
 586  */
 587 static int
 588 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 589                   u64 cookie, struct page *page, unsigned int count, int plus)
 590 {
 591         struct inode            *dir = dentry->d_inode;
 592         struct nfs_fattr        dir_attr;
 593         __be32                  *verf = NFS_COOKIEVERF(dir);
 594         struct nfs3_readdirargs arg = {
 595                 .fh             = NFS_FH(dir),
 596                 .cookie         = cookie,
 597                 .verf           = {verf[0], verf[1]},
 598                 .plus           = plus,
 599                 .count          = count,
 600                 .pages          = &page
 601         };
 602         struct nfs3_readdirres  res = {
 603                 .dir_attr       = &dir_attr,
 604                 .verf           = verf,
 605                 .plus           = plus
 606         };
 607         struct rpc_message      msg = {
 608                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 609                 .rpc_argp       = &arg,
 610                 .rpc_resp       = &res,
 611                 .rpc_cred       = cred
 612         };
 613         int                     status;
 614
 615         if (plus)
 616                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 617
 618         dprintk("NFS call  readdir%s %d\n",
 619                         plus? "plus" : "", (unsigned int) cookie);
 620
 621         nfs_fattr_init(&dir_attr);
 622         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 623
 624         nfs_invalidate_atime(dir);
 625
 626         nfs_refresh_inode(dir, &dir_attr);
 627         dprintk("NFS reply readdir: %d\n", status);
 628         return status;
 629 }
 630
 631 static int
 632 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 633                 dev_t rdev)
 634 {
 635         struct nfs3_createdata *data;
 636         mode_t mode = sattr->ia_mode;
 637         int status = -ENOMEM;
 638
 639         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 640                         MAJOR(rdev), MINOR(rdev));
 641
 642         sattr->ia_mode &= ~current_umask();
 643
 644         data = nfs3_alloc_createdata();
 645         if (data == NULL)
 646                 goto out;
 647
 648         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 649         data->arg.mknod.fh = NFS_FH(dir);
 650         data->arg.mknod.name = dentry->d_name.name;
 651         data->arg.mknod.len = dentry->d_name.len;
 652         data->arg.mknod.sattr = sattr;
 653         data->arg.mknod.rdev = rdev;
 654
 655         switch (sattr->ia_mode & S_IFMT) {
 656         case S_IFBLK:
 657                 data->arg.mknod.type = NF3BLK;
 658                 break;
 659         case S_IFCHR:
 660                 data->arg.mknod.type = NF3CHR;
 661                 break;
 662         case S_IFIFO:
 663                 data->arg.mknod.type = NF3FIFO;
 664                 break;
 665         case S_IFSOCK:
 666                 data->arg.mknod.type = NF3SOCK;
 667                 break;
 668         default:
 669                 status = -EINVAL;
 670                 goto out;
 671         }
 672
 673         status = nfs3_do_create(dir, dentry, data);
 674         if (status != 0)
 675                 goto out;
 676         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 677 out:
 678         nfs3_free_createdata(data);
 679         dprintk("NFS reply mknod: %d\n", status);
 680         return status;
 681 }
 682
 683 static int
 684 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 685                  struct nfs_fsstat *stat)
 686 {
 687         struct rpc_message msg = {
 688                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 689                 .rpc_argp       = fhandle,
 690                 .rpc_resp       = stat,
 691         };
 692         int     status;
 693
 694         dprintk("NFS call  fsstat\n");
 695         nfs_fattr_init(stat->fattr);
 696         status = rpc_call_sync(server->client, &msg, 0);
 697         dprintk("NFS reply statfs: %d\n", status);
 698         return status;
 699 }
 700
 701 static int
 702 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 703                  struct nfs_fsinfo *info)
 704 {
 705         struct rpc_message msg = {
 706                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 707                 .rpc_argp       = fhandle,
 708                 .rpc_resp       = info,
 709         };
 710         int     status;
 711
 712         dprintk("NFS call  fsinfo\n");
 713         nfs_fattr_init(info->fattr);
 714         status = rpc_call_sync(client, &msg, 0);
 715         dprintk("NFS reply fsinfo: %d\n", status);
 716         return status;
 717 }
 718
 719 /*
 720  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 721  * nfs_create_server
 722  */
 723 static int
 724 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 725                    struct nfs_fsinfo *info)
 726 {
 727         int     status;
 728
 729         status = do_proc_fsinfo(server->client, fhandle, info);
 730         if (status && server->nfs_client->cl_rpcclient != server->client)
 731                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 732         return status;
 733 }
 734
 735 static int
 736 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 737                    struct nfs_pathconf *info)
 738 {
 739         struct rpc_message msg = {
 740                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 741                 .rpc_argp       = fhandle,
 742                 .rpc_resp       = info,
 743         };
 744         int     status;
 745
 746         dprintk("NFS call  pathconf\n");
 747         nfs_fattr_init(info->fattr);
 748         status = rpc_call_sync(server->client, &msg, 0);
 749         dprintk("NFS reply pathconf: %d\n", status);
 750         return status;
 751 }
 752
 753 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 754 {
 755         if (nfs3_async_handle_jukebox(task, data->inode))
 756                 return -EAGAIN;
 757
 758         nfs_invalidate_atime(data->inode);
 759         nfs_refresh_inode(data->inode, &data->fattr);
 760         return 0;
 761 }
 762
 763 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 764 {
 765         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 766 }
 767
 768 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 769 {
 770         if (nfs3_async_handle_jukebox(task, data->inode))
 771                 return -EAGAIN;
 772         if (task->tk_status >= 0)
 773                 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
 774         return 0;
 775 }
 776
 777 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 778 {
 779         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 780 }
 781
 782 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 783 {
 784         if (nfs3_async_handle_jukebox(task, data->inode))
 785                 return -EAGAIN;
 786         nfs_refresh_inode(data->inode, data->res.fattr);
 787         return 0;
 788 }
 789
 790 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 791 {
 792         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 793 }
 794
 795 static int
 796 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 797 {
 798         struct inode *inode = filp->f_path.dentry->d_inode;
 799
 800         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 801 }
 802
 803 const struct nfs_rpc_ops nfs_v3_clientops = {
 804         .version        = 3,                    /* protocol version */
 805         .dentry_ops     = &nfs_dentry_operations,
 806         .dir_inode_ops  = &nfs3_dir_inode_operations,
 807         .file_inode_ops = &nfs3_file_inode_operations,
 808         .getroot        = nfs3_proc_get_root,
 809         .getattr        = nfs3_proc_getattr,
 810         .setattr        = nfs3_proc_setattr,
 811         .lookup         = nfs3_proc_lookup,
 812         .access         = nfs3_proc_access,
 813         .readlink       = nfs3_proc_readlink,
 814         .create         = nfs3_proc_create,
 815         .remove         = nfs3_proc_remove,
 816         .unlink_setup   = nfs3_proc_unlink_setup,
 817         .unlink_done    = nfs3_proc_unlink_done,
 818         .rename         = nfs3_proc_rename,
 819         .link           = nfs3_proc_link,
 820         .symlink        = nfs3_proc_symlink,
 821         .mkdir          = nfs3_proc_mkdir,
 822         .rmdir          = nfs3_proc_rmdir,
 823         .readdir        = nfs3_proc_readdir,
 824         .mknod          = nfs3_proc_mknod,
 825         .statfs         = nfs3_proc_statfs,
 826         .fsinfo         = nfs3_proc_fsinfo,
 827         .pathconf       = nfs3_proc_pathconf,
 828         .decode_dirent  = nfs3_decode_dirent,
 829         .read_setup     = nfs3_proc_read_setup,
 830         .read_done      = nfs3_read_done,
 831         .write_setup    = nfs3_proc_write_setup,
 832         .write_done     = nfs3_write_done,
 833         .commit_setup   = nfs3_proc_commit_setup,
 834         .commit_done    = nfs3_commit_done,
 835         .lock           = nfs3_proc_lock,
 836         .clear_acl_cache = nfs3_forget_cached_acls,
 837         .close_context  = nfs_close_context,
 838 };