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/errno.h>
  11 #include <linux/string.h>
  12 #include <linux/sunrpc/clnt.h>
  13 #include <linux/slab.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 and EKEYEXPIRED error messages */
  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 && res != -EKEYEXPIRED)
  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 && task->tk_status != -EKEYEXPIRED)
  47                 return 0;
  48         if (task->tk_status == -EJUKEBOX)
  49                 nfs_inc_stats(inode, NFSIOS_DELAY);
  50         task->tk_status = 0;
  51         rpc_restart_call(task);
  52         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  53         return 1;
  54 }
  55
  56 static int
  57 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  58                  struct nfs_fsinfo *info)
  59 {
  60         struct rpc_message msg = {
  61                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  62                 .rpc_argp       = fhandle,
  63                 .rpc_resp       = info,
  64         };
  65         int     status;
  66
  67         dprintk("%s: call  fsinfo\n", __func__);
  68         nfs_fattr_init(info->fattr);
  69         status = rpc_call_sync(client, &msg, 0);
  70         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  71         if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  72                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  73                 msg.rpc_resp = info->fattr;
  74                 status = rpc_call_sync(client, &msg, 0);
  75                 dprintk("%s: reply getattr: %d\n", __func__, status);
  76         }
  77         return status;
  78 }
  79
  80 /*
  81  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  82  */
  83 static int
  84 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  85                    struct nfs_fsinfo *info)
  86 {
  87         int     status;
  88
  89         status = do_proc_get_root(server->client, fhandle, info);
  90         if (status && server->nfs_client->cl_rpcclient != server->client)
  91                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  92         return status;
  93 }
  94
  95 /*
  96  * One function for each procedure in the NFS protocol.
  97  */
  98 static int
  99 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 100                 struct nfs_fattr *fattr)
 101 {
 102         struct rpc_message msg = {
 103                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 104                 .rpc_argp       = fhandle,
 105                 .rpc_resp       = fattr,
 106         };
 107         int     status;
 108
 109         dprintk("NFS call  getattr\n");
 110         nfs_fattr_init(fattr);
 111         status = rpc_call_sync(server->client, &msg, 0);
 112         dprintk("NFS reply getattr: %d\n", status);
 113         return status;
 114 }
 115
 116 static int
 117 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 118                         struct iattr *sattr)
 119 {
 120         struct inode *inode = dentry->d_inode;
 121         struct nfs3_sattrargs   arg = {
 122                 .fh             = NFS_FH(inode),
 123                 .sattr          = sattr,
 124         };
 125         struct rpc_message msg = {
 126                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 127                 .rpc_argp       = &arg,
 128                 .rpc_resp       = fattr,
 129         };
 130         int     status;
 131
 132         dprintk("NFS call  setattr\n");
 133         if (sattr->ia_valid & ATTR_FILE)
 134                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 135         nfs_fattr_init(fattr);
 136         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 137         if (status == 0)
 138                 nfs_setattr_update_inode(inode, sattr);
 139         dprintk("NFS reply setattr: %d\n", status);
 140         return status;
 141 }
 142
 143 static int
 144 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 145                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 146 {
 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                 .fh             = fhandle,
 154                 .fattr          = fattr
 155         };
 156         struct rpc_message msg = {
 157                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 158                 .rpc_argp       = &arg,
 159                 .rpc_resp       = &res,
 160         };
 161         int                     status;
 162
 163         dprintk("NFS call  lookup %s\n", name->name);
 164         res.dir_attr = nfs_alloc_fattr();
 165         if (res.dir_attr == NULL)
 166                 return -ENOMEM;
 167
 168         nfs_fattr_init(fattr);
 169         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 170         nfs_refresh_inode(dir, res.dir_attr);
 171         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 172                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 173                 msg.rpc_argp = fhandle;
 174                 msg.rpc_resp = fattr;
 175                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 176         }
 177         nfs_free_fattr(res.dir_attr);
 178         dprintk("NFS reply lookup: %d\n", status);
 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 struct nfs3_createdata {
 257         struct rpc_message msg;
 258         union {
 259                 struct nfs3_createargs create;
 260                 struct nfs3_mkdirargs mkdir;
 261                 struct nfs3_symlinkargs symlink;
 262                 struct nfs3_mknodargs mknod;
 263         } arg;
 264         struct nfs3_diropres res;
 265         struct nfs_fh fh;
 266         struct nfs_fattr fattr;
 267         struct nfs_fattr dir_attr;
 268 };
 269
 270 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 271 {
 272         struct nfs3_createdata *data;
 273
 274         data = kzalloc(sizeof(*data), GFP_KERNEL);
 275         if (data != NULL) {
 276                 data->msg.rpc_argp = &data->arg;
 277                 data->msg.rpc_resp = &data->res;
 278                 data->res.fh = &data->fh;
 279                 data->res.fattr = &data->fattr;
 280                 data->res.dir_attr = &data->dir_attr;
 281                 nfs_fattr_init(data->res.fattr);
 282                 nfs_fattr_init(data->res.dir_attr);
 283         }
 284         return data;
 285 }
 286
 287 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 288 {
 289         int status;
 290
 291         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 292         nfs_post_op_update_inode(dir, data->res.dir_attr);
 293         if (status == 0)
 294                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
 295         return status;
 296 }
 297
 298 static void nfs3_free_createdata(struct nfs3_createdata *data)
 299 {
 300         kfree(data);
 301 }
 302
 303 /*
 304  * Create a regular file.
 305  */
 306 static int
 307 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 308                  int flags, struct nameidata *nd)
 309 {
 310         struct nfs3_createdata *data;
 311         mode_t mode = sattr->ia_mode;
 312         int status = -ENOMEM;
 313
 314         dprintk("NFS call  create %s\n", dentry->d_name.name);
 315
 316         data = nfs3_alloc_createdata();
 317         if (data == NULL)
 318                 goto out;
 319
 320         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 321         data->arg.create.fh = NFS_FH(dir);
 322         data->arg.create.name = dentry->d_name.name;
 323         data->arg.create.len = dentry->d_name.len;
 324         data->arg.create.sattr = sattr;
 325
 326         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 327         if (flags & O_EXCL) {
 328                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 329                 data->arg.create.verifier[0] = jiffies;
 330                 data->arg.create.verifier[1] = current->pid;
 331         }
 332
 333         sattr->ia_mode &= ~current_umask();
 334
 335         for (;;) {
 336                 status = nfs3_do_create(dir, dentry, data);
 337
 338                 if (status != -ENOTSUPP)
 339                         break;
 340                 /* If the server doesn't support the exclusive creation
 341                  * semantics, try again with simple 'guarded' mode. */
 342                 switch (data->arg.create.createmode) {
 343                         case NFS3_CREATE_EXCLUSIVE:
 344                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 345                                 break;
 346
 347                         case NFS3_CREATE_GUARDED:
 348                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 349                                 break;
 350
 351                         case NFS3_CREATE_UNCHECKED:
 352                                 goto out;
 353                 }
 354                 nfs_fattr_init(data->res.dir_attr);
 355                 nfs_fattr_init(data->res.fattr);
 356         }
 357
 358         if (status != 0)
 359                 goto out;
 360
 361         /* When we created the file with exclusive semantics, make
 362          * sure we set the attributes afterwards. */
 363         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 364                 dprintk("NFS call  setattr (post-create)\n");
 365
 366                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 367                         sattr->ia_valid |= ATTR_ATIME;
 368                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 369                         sattr->ia_valid |= ATTR_MTIME;
 370
 371                 /* Note: we could use a guarded setattr here, but I'm
 372                  * not sure this buys us anything (and I'd have
 373                  * to revamp the NFSv3 XDR code) */
 374                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 375                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 376                 dprintk("NFS reply setattr (post-create): %d\n", status);
 377                 if (status != 0)
 378                         goto out;
 379         }
 380         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 381 out:
 382         nfs3_free_createdata(data);
 383         dprintk("NFS reply create: %d\n", status);
 384         return status;
 385 }
 386
 387 static int
 388 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 389 {
 390         struct nfs_removeargs arg = {
 391                 .fh = NFS_FH(dir),
 392                 .name.len = name->len,
 393                 .name.name = name->name,
 394         };
 395         struct nfs_removeres res;
 396         struct rpc_message msg = {
 397                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 398                 .rpc_argp = &arg,
 399                 .rpc_resp = &res,
 400         };
 401         int                     status;
 402
 403         dprintk("NFS call  remove %s\n", name->name);
 404         nfs_fattr_init(&res.dir_attr);
 405         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 406         nfs_post_op_update_inode(dir, &res.dir_attr);
 407         dprintk("NFS reply remove: %d\n", status);
 408         return status;
 409 }
 410
 411 static void
 412 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 413 {
 414         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 415 }
 416
 417 static int
 418 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 419 {
 420         struct nfs_removeres *res;
 421         if (nfs3_async_handle_jukebox(task, dir))
 422                 return 0;
 423         res = task->tk_msg.rpc_resp;
 424         nfs_post_op_update_inode(dir, &res->dir_attr);
 425         return 1;
 426 }
 427
 428 static int
 429 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 430                  struct inode *new_dir, struct qstr *new_name)
 431 {
 432         struct nfs_fattr        old_dir_attr, new_dir_attr;
 433         struct nfs3_renameargs  arg = {
 434                 .fromfh         = NFS_FH(old_dir),
 435                 .fromname       = old_name->name,
 436                 .fromlen        = old_name->len,
 437                 .tofh           = NFS_FH(new_dir),
 438                 .toname         = new_name->name,
 439                 .tolen          = new_name->len
 440         };
 441         struct nfs3_renameres   res = {
 442                 .fromattr       = &old_dir_attr,
 443                 .toattr         = &new_dir_attr
 444         };
 445         struct rpc_message msg = {
 446                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 447                 .rpc_argp       = &arg,
 448                 .rpc_resp       = &res,
 449         };
 450         int                     status;
 451
 452         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 453         nfs_fattr_init(&old_dir_attr);
 454         nfs_fattr_init(&new_dir_attr);
 455         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 456         nfs_post_op_update_inode(old_dir, &old_dir_attr);
 457         nfs_post_op_update_inode(new_dir, &new_dir_attr);
 458         dprintk("NFS reply rename: %d\n", status);
 459         return status;
 460 }
 461
 462 static int
 463 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 464 {
 465         struct nfs_fattr        dir_attr, fattr;
 466         struct nfs3_linkargs    arg = {
 467                 .fromfh         = NFS_FH(inode),
 468                 .tofh           = NFS_FH(dir),
 469                 .toname         = name->name,
 470                 .tolen          = name->len
 471         };
 472         struct nfs3_linkres     res = {
 473                 .dir_attr       = &dir_attr,
 474                 .fattr          = &fattr
 475         };
 476         struct rpc_message msg = {
 477                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 478                 .rpc_argp       = &arg,
 479                 .rpc_resp       = &res,
 480         };
 481         int                     status;
 482
 483         dprintk("NFS call  link %s\n", name->name);
 484         nfs_fattr_init(&dir_attr);
 485         nfs_fattr_init(&fattr);
 486         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 487         nfs_post_op_update_inode(dir, &dir_attr);
 488         nfs_post_op_update_inode(inode, &fattr);
 489         dprintk("NFS reply link: %d\n", status);
 490         return status;
 491 }
 492
 493 static int
 494 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 495                   unsigned int len, struct iattr *sattr)
 496 {
 497         struct nfs3_createdata *data;
 498         int status = -ENOMEM;
 499
 500         if (len > NFS3_MAXPATHLEN)
 501                 return -ENAMETOOLONG;
 502
 503         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 504
 505         data = nfs3_alloc_createdata();
 506         if (data == NULL)
 507                 goto out;
 508         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 509         data->arg.symlink.fromfh = NFS_FH(dir);
 510         data->arg.symlink.fromname = dentry->d_name.name;
 511         data->arg.symlink.fromlen = dentry->d_name.len;
 512         data->arg.symlink.pages = &page;
 513         data->arg.symlink.pathlen = len;
 514         data->arg.symlink.sattr = sattr;
 515
 516         status = nfs3_do_create(dir, dentry, data);
 517
 518         nfs3_free_createdata(data);
 519 out:
 520         dprintk("NFS reply symlink: %d\n", status);
 521         return status;
 522 }
 523
 524 static int
 525 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 526 {
 527         struct nfs3_createdata *data;
 528         int mode = sattr->ia_mode;
 529         int status = -ENOMEM;
 530
 531         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 532
 533         sattr->ia_mode &= ~current_umask();
 534
 535         data = nfs3_alloc_createdata();
 536         if (data == NULL)
 537                 goto out;
 538
 539         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 540         data->arg.mkdir.fh = NFS_FH(dir);
 541         data->arg.mkdir.name = dentry->d_name.name;
 542         data->arg.mkdir.len = dentry->d_name.len;
 543         data->arg.mkdir.sattr = sattr;
 544
 545         status = nfs3_do_create(dir, dentry, data);
 546         if (status != 0)
 547                 goto out;
 548
 549         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 550 out:
 551         nfs3_free_createdata(data);
 552         dprintk("NFS reply mkdir: %d\n", status);
 553         return status;
 554 }
 555
 556 static int
 557 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 558 {
 559         struct nfs_fattr        dir_attr;
 560         struct nfs3_diropargs   arg = {
 561                 .fh             = NFS_FH(dir),
 562                 .name           = name->name,
 563                 .len            = name->len
 564         };
 565         struct rpc_message msg = {
 566                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 567                 .rpc_argp       = &arg,
 568                 .rpc_resp       = &dir_attr,
 569         };
 570         int                     status;
 571
 572         dprintk("NFS call  rmdir %s\n", name->name);
 573         nfs_fattr_init(&dir_attr);
 574         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 575         nfs_post_op_update_inode(dir, &dir_attr);
 576         dprintk("NFS reply rmdir: %d\n", status);
 577         return status;
 578 }
 579
 580 /*
 581  * The READDIR implementation is somewhat hackish - we pass the user buffer
 582  * to the encode function, which installs it in the receive iovec.
 583  * The decode function itself doesn't perform any decoding, it just makes
 584  * sure the reply is syntactically correct.
 585  *
 586  * Also note that this implementation handles both plain readdir and
 587  * readdirplus.
 588  */
 589 static int
 590 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 591                   u64 cookie, struct page *page, unsigned int count, int plus)
 592 {
 593         struct inode            *dir = dentry->d_inode;
 594         struct nfs_fattr        dir_attr;
 595         __be32                  *verf = NFS_COOKIEVERF(dir);
 596         struct nfs3_readdirargs arg = {
 597                 .fh             = NFS_FH(dir),
 598                 .cookie         = cookie,
 599                 .verf           = {verf[0], verf[1]},
 600                 .plus           = plus,
 601                 .count          = count,
 602                 .pages          = &page
 603         };
 604         struct nfs3_readdirres  res = {
 605                 .dir_attr       = &dir_attr,
 606                 .verf           = verf,
 607                 .plus           = plus
 608         };
 609         struct rpc_message      msg = {
 610                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 611                 .rpc_argp       = &arg,
 612                 .rpc_resp       = &res,
 613                 .rpc_cred       = cred
 614         };
 615         int                     status;
 616
 617         if (plus)
 618                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 619
 620         dprintk("NFS call  readdir%s %d\n",
 621                         plus? "plus" : "", (unsigned int) cookie);
 622
 623         nfs_fattr_init(&dir_attr);
 624         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 625
 626         nfs_invalidate_atime(dir);
 627
 628         nfs_refresh_inode(dir, &dir_attr);
 629         dprintk("NFS reply readdir: %d\n", status);
 630         return status;
 631 }
 632
 633 static int
 634 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 635                 dev_t rdev)
 636 {
 637         struct nfs3_createdata *data;
 638         mode_t mode = sattr->ia_mode;
 639         int status = -ENOMEM;
 640
 641         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 642                         MAJOR(rdev), MINOR(rdev));
 643
 644         sattr->ia_mode &= ~current_umask();
 645
 646         data = nfs3_alloc_createdata();
 647         if (data == NULL)
 648                 goto out;
 649
 650         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 651         data->arg.mknod.fh = NFS_FH(dir);
 652         data->arg.mknod.name = dentry->d_name.name;
 653         data->arg.mknod.len = dentry->d_name.len;
 654         data->arg.mknod.sattr = sattr;
 655         data->arg.mknod.rdev = rdev;
 656
 657         switch (sattr->ia_mode & S_IFMT) {
 658         case S_IFBLK:
 659                 data->arg.mknod.type = NF3BLK;
 660                 break;
 661         case S_IFCHR:
 662                 data->arg.mknod.type = NF3CHR;
 663                 break;
 664         case S_IFIFO:
 665                 data->arg.mknod.type = NF3FIFO;
 666                 break;
 667         case S_IFSOCK:
 668                 data->arg.mknod.type = NF3SOCK;
 669                 break;
 670         default:
 671                 status = -EINVAL;
 672                 goto out;
 673         }
 674
 675         status = nfs3_do_create(dir, dentry, data);
 676         if (status != 0)
 677                 goto out;
 678         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 679 out:
 680         nfs3_free_createdata(data);
 681         dprintk("NFS reply mknod: %d\n", status);
 682         return status;
 683 }
 684
 685 static int
 686 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 687                  struct nfs_fsstat *stat)
 688 {
 689         struct rpc_message msg = {
 690                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 691                 .rpc_argp       = fhandle,
 692                 .rpc_resp       = stat,
 693         };
 694         int     status;
 695
 696         dprintk("NFS call  fsstat\n");
 697         nfs_fattr_init(stat->fattr);
 698         status = rpc_call_sync(server->client, &msg, 0);
 699         dprintk("NFS reply statfs: %d\n", status);
 700         return status;
 701 }
 702
 703 static int
 704 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 705                  struct nfs_fsinfo *info)
 706 {
 707         struct rpc_message msg = {
 708                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 709                 .rpc_argp       = fhandle,
 710                 .rpc_resp       = info,
 711         };
 712         int     status;
 713
 714         dprintk("NFS call  fsinfo\n");
 715         nfs_fattr_init(info->fattr);
 716         status = rpc_call_sync(client, &msg, 0);
 717         dprintk("NFS reply fsinfo: %d\n", status);
 718         return status;
 719 }
 720
 721 /*
 722  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 723  * nfs_create_server
 724  */
 725 static int
 726 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 727                    struct nfs_fsinfo *info)
 728 {
 729         int     status;
 730
 731         status = do_proc_fsinfo(server->client, fhandle, info);
 732         if (status && server->nfs_client->cl_rpcclient != server->client)
 733                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 734         return status;
 735 }
 736
 737 static int
 738 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 739                    struct nfs_pathconf *info)
 740 {
 741         struct rpc_message msg = {
 742                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 743                 .rpc_argp       = fhandle,
 744                 .rpc_resp       = info,
 745         };
 746         int     status;
 747
 748         dprintk("NFS call  pathconf\n");
 749         nfs_fattr_init(info->fattr);
 750         status = rpc_call_sync(server->client, &msg, 0);
 751         dprintk("NFS reply pathconf: %d\n", status);
 752         return status;
 753 }
 754
 755 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 756 {
 757         if (nfs3_async_handle_jukebox(task, data->inode))
 758                 return -EAGAIN;
 759
 760         nfs_invalidate_atime(data->inode);
 761         nfs_refresh_inode(data->inode, &data->fattr);
 762         return 0;
 763 }
 764
 765 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 766 {
 767         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 768 }
 769
 770 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 771 {
 772         if (nfs3_async_handle_jukebox(task, data->inode))
 773                 return -EAGAIN;
 774         if (task->tk_status >= 0)
 775                 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
 776         return 0;
 777 }
 778
 779 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 780 {
 781         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 782 }
 783
 784 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 785 {
 786         if (nfs3_async_handle_jukebox(task, data->inode))
 787                 return -EAGAIN;
 788         nfs_refresh_inode(data->inode, data->res.fattr);
 789         return 0;
 790 }
 791
 792 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 793 {
 794         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 795 }
 796
 797 static int
 798 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 799 {
 800         struct inode *inode = filp->f_path.dentry->d_inode;
 801
 802         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 803 }
 804
 805 const struct nfs_rpc_ops nfs_v3_clientops = {
 806         .version        = 3,                    /* protocol version */
 807         .dentry_ops     = &nfs_dentry_operations,
 808         .dir_inode_ops  = &nfs3_dir_inode_operations,
 809         .file_inode_ops = &nfs3_file_inode_operations,
 810         .getroot        = nfs3_proc_get_root,
 811         .getattr        = nfs3_proc_getattr,
 812         .setattr        = nfs3_proc_setattr,
 813         .lookup         = nfs3_proc_lookup,
 814         .access         = nfs3_proc_access,
 815         .readlink       = nfs3_proc_readlink,
 816         .create         = nfs3_proc_create,
 817         .remove         = nfs3_proc_remove,
 818         .unlink_setup   = nfs3_proc_unlink_setup,
 819         .unlink_done    = nfs3_proc_unlink_done,
 820         .rename         = nfs3_proc_rename,
 821         .link           = nfs3_proc_link,
 822         .symlink        = nfs3_proc_symlink,
 823         .mkdir          = nfs3_proc_mkdir,
 824         .rmdir          = nfs3_proc_rmdir,
 825         .readdir        = nfs3_proc_readdir,
 826         .mknod          = nfs3_proc_mknod,
 827         .statfs         = nfs3_proc_statfs,
 828         .fsinfo         = nfs3_proc_fsinfo,
 829         .pathconf       = nfs3_proc_pathconf,
 830         .decode_dirent  = nfs3_decode_dirent,
 831         .read_setup     = nfs3_proc_read_setup,
 832         .read_done      = nfs3_read_done,
 833         .write_setup    = nfs3_proc_write_setup,
 834         .write_done     = nfs3_write_done,
 835         .commit_setup   = nfs3_proc_commit_setup,
 836         .commit_done    = nfs3_commit_done,
 837         .lock           = nfs3_proc_lock,
 838         .clear_acl_cache = nfs3_forget_cached_acls,
 839         .close_context  = nfs_close_context,
 840 };