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 static int nfs3_proc_write(struct nfs_write_data *wdata)
 280 {
 281         int                     rpcflags = wdata->flags;
 282         struct inode *          inode = wdata->inode;
 283         struct nfs_fattr *      fattr = wdata->res.fattr;
 284         struct rpc_message      msg = {
 285                 .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
 286                 .rpc_argp       = &wdata->args,
 287                 .rpc_resp       = &wdata->res,
 288                 .rpc_cred       = wdata->cred,
 289         };
 290         int                     status;
 291
 292         dprintk("NFS call  write %d @ %Ld\n", wdata->args.count,
 293                         (long long) wdata->args.offset);
 294         nfs_fattr_init(fattr);
 295         status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags);
 296         if (status >= 0)
 297                 nfs_post_op_update_inode(inode, fattr);
 298         dprintk("NFS reply write: %d\n", status);
 299         return status < 0? status : wdata->res.count;
 300 }
 301
 302 static int nfs3_proc_commit(struct nfs_write_data *cdata)
 303 {
 304         struct inode *          inode = cdata->inode;
 305         struct nfs_fattr *      fattr = cdata->res.fattr;
 306         struct rpc_message      msg = {
 307                 .rpc_proc       = &nfs3_procedures[NFS3PROC_COMMIT],
 308                 .rpc_argp       = &cdata->args,
 309                 .rpc_resp       = &cdata->res,
 310                 .rpc_cred       = cdata->cred,
 311         };
 312         int                     status;
 313
 314         dprintk("NFS call  commit %d @ %Ld\n", cdata->args.count,
 315                         (long long) cdata->args.offset);
 316         nfs_fattr_init(fattr);
 317         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 318         if (status >= 0)
 319                 nfs_post_op_update_inode(inode, fattr);
 320         dprintk("NFS reply commit: %d\n", status);
 321         return status;
 322 }
 323
 324 /*
 325  * Create a regular file.
 326  * For now, we don't implement O_EXCL.
 327  */
 328 static int
 329 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 330                  int flags, struct nameidata *nd)
 331 {
 332         struct nfs_fh           fhandle;
 333         struct nfs_fattr        fattr;
 334         struct nfs_fattr        dir_attr;
 335         struct nfs3_createargs  arg = {
 336                 .fh             = NFS_FH(dir),
 337                 .name           = dentry->d_name.name,
 338                 .len            = dentry->d_name.len,
 339                 .sattr          = sattr,
 340         };
 341         struct nfs3_diropres    res = {
 342                 .dir_attr       = &dir_attr,
 343                 .fh             = &fhandle,
 344                 .fattr          = &fattr
 345         };
 346         struct rpc_message msg = {
 347                 .rpc_proc       = &nfs3_procedures[NFS3PROC_CREATE],
 348                 .rpc_argp       = &arg,
 349                 .rpc_resp       = &res,
 350         };
 351         mode_t mode = sattr->ia_mode;
 352         int status;
 353
 354         dprintk("NFS call  create %s\n", dentry->d_name.name);
 355         arg.createmode = NFS3_CREATE_UNCHECKED;
 356         if (flags & O_EXCL) {
 357                 arg.createmode  = NFS3_CREATE_EXCLUSIVE;
 358                 arg.verifier[0] = jiffies;
 359                 arg.verifier[1] = current->pid;
 360         }
 361
 362         sattr->ia_mode &= ~current->fs->umask;
 363
 364 again:
 365         nfs_fattr_init(&dir_attr);
 366         nfs_fattr_init(&fattr);
 367         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 368         nfs_refresh_inode(dir, &dir_attr);
 369
 370         /* If the server doesn't support the exclusive creation semantics,
 371          * try again with simple 'guarded' mode. */
 372         if (status == NFSERR_NOTSUPP) {
 373                 switch (arg.createmode) {
 374                         case NFS3_CREATE_EXCLUSIVE:
 375                                 arg.createmode = NFS3_CREATE_GUARDED;
 376                                 break;
 377
 378                         case NFS3_CREATE_GUARDED:
 379                                 arg.createmode = NFS3_CREATE_UNCHECKED;
 380                                 break;
 381
 382                         case NFS3_CREATE_UNCHECKED:
 383                                 goto out;
 384                 }
 385                 goto again;
 386         }
 387
 388         if (status == 0)
 389                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 390         if (status != 0)
 391                 goto out;
 392
 393         /* When we created the file with exclusive semantics, make
 394          * sure we set the attributes afterwards. */
 395         if (arg.createmode == NFS3_CREATE_EXCLUSIVE) {
 396                 dprintk("NFS call  setattr (post-create)\n");
 397
 398                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 399                         sattr->ia_valid |= ATTR_ATIME;
 400                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 401                         sattr->ia_valid |= ATTR_MTIME;
 402
 403                 /* Note: we could use a guarded setattr here, but I'm
 404                  * not sure this buys us anything (and I'd have
 405                  * to revamp the NFSv3 XDR code) */
 406                 status = nfs3_proc_setattr(dentry, &fattr, sattr);
 407                 if (status == 0)
 408                         nfs_setattr_update_inode(dentry->d_inode, sattr);
 409                 nfs_refresh_inode(dentry->d_inode, &fattr);
 410                 dprintk("NFS reply setattr (post-create): %d\n", status);
 411         }
 412         if (status != 0)
 413                 goto out;
 414         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 415 out:
 416         dprintk("NFS reply create: %d\n", status);
 417         return status;
 418 }
 419
 420 static int
 421 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 422 {
 423         struct nfs_fattr        dir_attr;
 424         struct nfs3_diropargs   arg = {
 425                 .fh             = NFS_FH(dir),
 426                 .name           = name->name,
 427                 .len            = name->len
 428         };
 429         struct rpc_message      msg = {
 430                 .rpc_proc       = &nfs3_procedures[NFS3PROC_REMOVE],
 431                 .rpc_argp       = &arg,
 432                 .rpc_resp       = &dir_attr,
 433         };
 434         int                     status;
 435
 436         dprintk("NFS call  remove %s\n", name->name);
 437         nfs_fattr_init(&dir_attr);
 438         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 439         nfs_post_op_update_inode(dir, &dir_attr);
 440         dprintk("NFS reply remove: %d\n", status);
 441         return status;
 442 }
 443
 444 static int
 445 nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
 446 {
 447         struct unlinkxdr {
 448                 struct nfs3_diropargs arg;
 449                 struct nfs_fattr res;
 450         } *ptr;
 451
 452         ptr = kmalloc(sizeof(*ptr), GFP_KERNEL);
 453         if (!ptr)
 454                 return -ENOMEM;
 455         ptr->arg.fh = NFS_FH(dir->d_inode);
 456         ptr->arg.name = name->name;
 457         ptr->arg.len = name->len;
 458         nfs_fattr_init(&ptr->res);
 459         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 460         msg->rpc_argp = &ptr->arg;
 461         msg->rpc_resp = &ptr->res;
 462         return 0;
 463 }
 464
 465 static int
 466 nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
 467 {
 468         struct rpc_message *msg = &task->tk_msg;
 469         struct nfs_fattr        *dir_attr;
 470
 471         if (nfs3_async_handle_jukebox(task, dir->d_inode))
 472                 return 1;
 473         if (msg->rpc_argp) {
 474                 dir_attr = (struct nfs_fattr*)msg->rpc_resp;
 475                 nfs_post_op_update_inode(dir->d_inode, dir_attr);
 476                 kfree(msg->rpc_argp);
 477         }
 478         return 0;
 479 }
 480
 481 static int
 482 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 483                  struct inode *new_dir, struct qstr *new_name)
 484 {
 485         struct nfs_fattr        old_dir_attr, new_dir_attr;
 486         struct nfs3_renameargs  arg = {
 487                 .fromfh         = NFS_FH(old_dir),
 488                 .fromname       = old_name->name,
 489                 .fromlen        = old_name->len,
 490                 .tofh           = NFS_FH(new_dir),
 491                 .toname         = new_name->name,
 492                 .tolen          = new_name->len
 493         };
 494         struct nfs3_renameres   res = {
 495                 .fromattr       = &old_dir_attr,
 496                 .toattr         = &new_dir_attr
 497         };
 498         struct rpc_message msg = {
 499                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 500                 .rpc_argp       = &arg,
 501                 .rpc_resp       = &res,
 502         };
 503         int                     status;
 504
 505         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 506         nfs_fattr_init(&old_dir_attr);
 507         nfs_fattr_init(&new_dir_attr);
 508         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 509         nfs_post_op_update_inode(old_dir, &old_dir_attr);
 510         nfs_post_op_update_inode(new_dir, &new_dir_attr);
 511         dprintk("NFS reply rename: %d\n", status);
 512         return status;
 513 }
 514
 515 static int
 516 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 517 {
 518         struct nfs_fattr        dir_attr, fattr;
 519         struct nfs3_linkargs    arg = {
 520                 .fromfh         = NFS_FH(inode),
 521                 .tofh           = NFS_FH(dir),
 522                 .toname         = name->name,
 523                 .tolen          = name->len
 524         };
 525         struct nfs3_linkres     res = {
 526                 .dir_attr       = &dir_attr,
 527                 .fattr          = &fattr
 528         };
 529         struct rpc_message msg = {
 530                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 531                 .rpc_argp       = &arg,
 532                 .rpc_resp       = &res,
 533         };
 534         int                     status;
 535
 536         dprintk("NFS call  link %s\n", name->name);
 537         nfs_fattr_init(&dir_attr);
 538         nfs_fattr_init(&fattr);
 539         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 540         nfs_post_op_update_inode(dir, &dir_attr);
 541         nfs_post_op_update_inode(inode, &fattr);
 542         dprintk("NFS reply link: %d\n", status);
 543         return status;
 544 }
 545
 546 static int
 547 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 548                   unsigned int len, struct iattr *sattr)
 549 {
 550         struct nfs_fh fhandle;
 551         struct nfs_fattr fattr, dir_attr;
 552         struct nfs3_symlinkargs arg = {
 553                 .fromfh         = NFS_FH(dir),
 554                 .fromname       = dentry->d_name.name,
 555                 .fromlen        = dentry->d_name.len,
 556                 .pages          = &page,
 557                 .pathlen        = len,
 558                 .sattr          = sattr
 559         };
 560         struct nfs3_diropres    res = {
 561                 .dir_attr       = &dir_attr,
 562                 .fh             = &fhandle,
 563                 .fattr          = &fattr
 564         };
 565         struct rpc_message msg = {
 566                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SYMLINK],
 567                 .rpc_argp       = &arg,
 568                 .rpc_resp       = &res,
 569         };
 570         int                     status;
 571
 572         if (len > NFS3_MAXPATHLEN)
 573                 return -ENAMETOOLONG;
 574
 575         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 576
 577         nfs_fattr_init(&dir_attr);
 578         nfs_fattr_init(&fattr);
 579         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 580         nfs_post_op_update_inode(dir, &dir_attr);
 581         if (status != 0)
 582                 goto out;
 583         status = nfs_instantiate(dentry, &fhandle, &fattr);
 584 out:
 585         dprintk("NFS reply symlink: %d\n", status);
 586         return status;
 587 }
 588
 589 static int
 590 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 591 {
 592         struct nfs_fh fhandle;
 593         struct nfs_fattr fattr, dir_attr;
 594         struct nfs3_mkdirargs   arg = {
 595                 .fh             = NFS_FH(dir),
 596                 .name           = dentry->d_name.name,
 597                 .len            = dentry->d_name.len,
 598                 .sattr          = sattr
 599         };
 600         struct nfs3_diropres    res = {
 601                 .dir_attr       = &dir_attr,
 602                 .fh             = &fhandle,
 603                 .fattr          = &fattr
 604         };
 605         struct rpc_message msg = {
 606                 .rpc_proc       = &nfs3_procedures[NFS3PROC_MKDIR],
 607                 .rpc_argp       = &arg,
 608                 .rpc_resp       = &res,
 609         };
 610         int mode = sattr->ia_mode;
 611         int status;
 612
 613         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 614
 615         sattr->ia_mode &= ~current->fs->umask;
 616
 617         nfs_fattr_init(&dir_attr);
 618         nfs_fattr_init(&fattr);
 619         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 620         nfs_post_op_update_inode(dir, &dir_attr);
 621         if (status != 0)
 622                 goto out;
 623         status = nfs_instantiate(dentry, &fhandle, &fattr);
 624         if (status != 0)
 625                 goto out;
 626         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 627 out:
 628         dprintk("NFS reply mkdir: %d\n", status);
 629         return status;
 630 }
 631
 632 static int
 633 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 634 {
 635         struct nfs_fattr        dir_attr;
 636         struct nfs3_diropargs   arg = {
 637                 .fh             = NFS_FH(dir),
 638                 .name           = name->name,
 639                 .len            = name->len
 640         };
 641         struct rpc_message msg = {
 642                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 643                 .rpc_argp       = &arg,
 644                 .rpc_resp       = &dir_attr,
 645         };
 646         int                     status;
 647
 648         dprintk("NFS call  rmdir %s\n", name->name);
 649         nfs_fattr_init(&dir_attr);
 650         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 651         nfs_post_op_update_inode(dir, &dir_attr);
 652         dprintk("NFS reply rmdir: %d\n", status);
 653         return status;
 654 }
 655
 656 /*
 657  * The READDIR implementation is somewhat hackish - we pass the user buffer
 658  * to the encode function, which installs it in the receive iovec.
 659  * The decode function itself doesn't perform any decoding, it just makes
 660  * sure the reply is syntactically correct.
 661  *
 662  * Also note that this implementation handles both plain readdir and
 663  * readdirplus.
 664  */
 665 static int
 666 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 667                   u64 cookie, struct page *page, unsigned int count, int plus)
 668 {
 669         struct inode            *dir = dentry->d_inode;
 670         struct nfs_fattr        dir_attr;
 671         __be32                  *verf = NFS_COOKIEVERF(dir);
 672         struct nfs3_readdirargs arg = {
 673                 .fh             = NFS_FH(dir),
 674                 .cookie         = cookie,
 675                 .verf           = {verf[0], verf[1]},
 676                 .plus           = plus,
 677                 .count          = count,
 678                 .pages          = &page
 679         };
 680         struct nfs3_readdirres  res = {
 681                 .dir_attr       = &dir_attr,
 682                 .verf           = verf,
 683                 .plus           = plus
 684         };
 685         struct rpc_message      msg = {
 686                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 687                 .rpc_argp       = &arg,
 688                 .rpc_resp       = &res,
 689                 .rpc_cred       = cred
 690         };
 691         int                     status;
 692
 693         lock_kernel();
 694
 695         if (plus)
 696                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 697
 698         dprintk("NFS call  readdir%s %d\n",
 699                         plus? "plus" : "", (unsigned int) cookie);
 700
 701         nfs_fattr_init(&dir_attr);
 702         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 703         nfs_refresh_inode(dir, &dir_attr);
 704         dprintk("NFS reply readdir: %d\n", status);
 705         unlock_kernel();
 706         return status;
 707 }
 708
 709 static int
 710 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 711                 dev_t rdev)
 712 {
 713         struct nfs_fh fh;
 714         struct nfs_fattr fattr, dir_attr;
 715         struct nfs3_mknodargs   arg = {
 716                 .fh             = NFS_FH(dir),
 717                 .name           = dentry->d_name.name,
 718                 .len            = dentry->d_name.len,
 719                 .sattr          = sattr,
 720                 .rdev           = rdev
 721         };
 722         struct nfs3_diropres    res = {
 723                 .dir_attr       = &dir_attr,
 724                 .fh             = &fh,
 725                 .fattr          = &fattr
 726         };
 727         struct rpc_message msg = {
 728                 .rpc_proc       = &nfs3_procedures[NFS3PROC_MKNOD],
 729                 .rpc_argp       = &arg,
 730                 .rpc_resp       = &res,
 731         };
 732         mode_t mode = sattr->ia_mode;
 733         int status;
 734
 735         switch (sattr->ia_mode & S_IFMT) {
 736         case S_IFBLK:   arg.type = NF3BLK;  break;
 737         case S_IFCHR:   arg.type = NF3CHR;  break;
 738         case S_IFIFO:   arg.type = NF3FIFO; break;
 739         case S_IFSOCK:  arg.type = NF3SOCK; break;
 740         default:        return -EINVAL;
 741         }
 742
 743         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 744                         MAJOR(rdev), MINOR(rdev));
 745
 746         sattr->ia_mode &= ~current->fs->umask;
 747
 748         nfs_fattr_init(&dir_attr);
 749         nfs_fattr_init(&fattr);
 750         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 751         nfs_post_op_update_inode(dir, &dir_attr);
 752         if (status != 0)
 753                 goto out;
 754         status = nfs_instantiate(dentry, &fh, &fattr);
 755         if (status != 0)
 756                 goto out;
 757         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 758 out:
 759         dprintk("NFS reply mknod: %d\n", status);
 760         return status;
 761 }
 762
 763 static int
 764 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 765                  struct nfs_fsstat *stat)
 766 {
 767         struct rpc_message msg = {
 768                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 769                 .rpc_argp       = fhandle,
 770                 .rpc_resp       = stat,
 771         };
 772         int     status;
 773
 774         dprintk("NFS call  fsstat\n");
 775         nfs_fattr_init(stat->fattr);
 776         status = rpc_call_sync(server->client, &msg, 0);
 777         dprintk("NFS reply statfs: %d\n", status);
 778         return status;
 779 }
 780
 781 static int
 782 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 783                  struct nfs_fsinfo *info)
 784 {
 785         struct rpc_message msg = {
 786                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 787                 .rpc_argp       = fhandle,
 788                 .rpc_resp       = info,
 789         };
 790         int     status;
 791
 792         dprintk("NFS call  fsinfo\n");
 793         nfs_fattr_init(info->fattr);
 794         status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
 795         dprintk("NFS reply fsinfo: %d\n", status);
 796         return status;
 797 }
 798
 799 static int
 800 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 801                    struct nfs_pathconf *info)
 802 {
 803         struct rpc_message msg = {
 804                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 805                 .rpc_argp       = fhandle,
 806                 .rpc_resp       = info,
 807         };
 808         int     status;
 809
 810         dprintk("NFS call  pathconf\n");
 811         nfs_fattr_init(info->fattr);
 812         status = rpc_call_sync(server->client, &msg, 0);
 813         dprintk("NFS reply pathconf: %d\n", status);
 814         return status;
 815 }
 816
 817 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 818 {
 819         if (nfs3_async_handle_jukebox(task, data->inode))
 820                 return -EAGAIN;
 821         /* Call back common NFS readpage processing */
 822         if (task->tk_status >= 0)
 823                 nfs_refresh_inode(data->inode, &data->fattr);
 824         return 0;
 825 }
 826
 827 static void nfs3_proc_read_setup(struct nfs_read_data *data)
 828 {
 829         struct rpc_message      msg = {
 830                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
 831                 .rpc_argp       = &data->args,
 832                 .rpc_resp       = &data->res,
 833                 .rpc_cred       = data->cred,
 834         };
 835
 836         rpc_call_setup(&data->task, &msg, 0);
 837 }
 838
 839 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 840 {
 841         if (nfs3_async_handle_jukebox(task, data->inode))
 842                 return -EAGAIN;
 843         if (task->tk_status >= 0)
 844                 nfs_post_op_update_inode(data->inode, data->res.fattr);
 845         return 0;
 846 }
 847
 848 static void nfs3_proc_write_setup(struct nfs_write_data *data, int how)
 849 {
 850         struct rpc_message      msg = {
 851                 .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
 852                 .rpc_argp       = &data->args,
 853                 .rpc_resp       = &data->res,
 854                 .rpc_cred       = data->cred,
 855         };
 856
 857         data->args.stable = NFS_UNSTABLE;
 858         if (how & FLUSH_STABLE) {
 859                 data->args.stable = NFS_FILE_SYNC;
 860                 if (NFS_I(data->inode)->ncommit)
 861                         data->args.stable = NFS_DATA_SYNC;
 862         }
 863
 864         /* Finalize the task. */
 865         rpc_call_setup(&data->task, &msg, 0);
 866 }
 867
 868 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 869 {
 870         if (nfs3_async_handle_jukebox(task, data->inode))
 871                 return -EAGAIN;
 872         if (task->tk_status >= 0)
 873                 nfs_post_op_update_inode(data->inode, data->res.fattr);
 874         return 0;
 875 }
 876
 877 static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
 878 {
 879         struct rpc_message      msg = {
 880                 .rpc_proc       = &nfs3_procedures[NFS3PROC_COMMIT],
 881                 .rpc_argp       = &data->args,
 882                 .rpc_resp       = &data->res,
 883                 .rpc_cred       = data->cred,
 884         };
 885
 886         rpc_call_setup(&data->task, &msg, 0);
 887 }
 888
 889 static int
 890 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 891 {
 892         return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
 893 }
 894
 895 const struct nfs_rpc_ops nfs_v3_clientops = {
 896         .version        = 3,                    /* protocol version */
 897         .dentry_ops     = &nfs_dentry_operations,
 898         .dir_inode_ops  = &nfs3_dir_inode_operations,
 899         .file_inode_ops = &nfs3_file_inode_operations,
 900         .getroot        = nfs3_proc_get_root,
 901         .getattr        = nfs3_proc_getattr,
 902         .setattr        = nfs3_proc_setattr,
 903         .lookup         = nfs3_proc_lookup,
 904         .access         = nfs3_proc_access,
 905         .readlink       = nfs3_proc_readlink,
 906         .read           = nfs3_proc_read,
 907         .write          = nfs3_proc_write,
 908         .commit         = nfs3_proc_commit,
 909         .create         = nfs3_proc_create,
 910         .remove         = nfs3_proc_remove,
 911         .unlink_setup   = nfs3_proc_unlink_setup,
 912         .unlink_done    = nfs3_proc_unlink_done,
 913         .rename         = nfs3_proc_rename,
 914         .link           = nfs3_proc_link,
 915         .symlink        = nfs3_proc_symlink,
 916         .mkdir          = nfs3_proc_mkdir,
 917         .rmdir          = nfs3_proc_rmdir,
 918         .readdir        = nfs3_proc_readdir,
 919         .mknod          = nfs3_proc_mknod,
 920         .statfs         = nfs3_proc_statfs,
 921         .fsinfo         = nfs3_proc_fsinfo,
 922         .pathconf       = nfs3_proc_pathconf,
 923         .decode_dirent  = nfs3_decode_dirent,
 924         .read_setup     = nfs3_proc_read_setup,
 925         .read_done      = nfs3_read_done,
 926         .write_setup    = nfs3_proc_write_setup,
 927         .write_done     = nfs3_write_done,
 928         .commit_setup   = nfs3_proc_commit_setup,
 929         .commit_done    = nfs3_commit_done,
 930         .file_open      = nfs_open,
 931         .file_release   = nfs_release,
 932         .lock           = nfs3_proc_lock,
 933         .clear_acl_cache = nfs3_forget_cached_acls,
 934 };