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 #include <linux/freezer.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 messages */
  28 static int
  29 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  30 {
  31         int res;
  32         do {
  33                 res = rpc_call_sync(clnt, msg, flags);
  34                 if (res != -EJUKEBOX)
  35                         break;
  36                 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
  37                 res = -ERESTARTSYS;
  38         } while (!fatal_signal_pending(current));
  39         return res;
  40 }
  41
  42 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  43
  44 static int
  45 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  46 {
  47         if (task->tk_status != -EJUKEBOX)
  48                 return 0;
  49         if (task->tk_status == -EJUKEBOX)
  50                 nfs_inc_stats(inode, NFSIOS_DELAY);
  51         task->tk_status = 0;
  52         rpc_restart_call(task);
  53         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  54         return 1;
  55 }
  56
  57 static int
  58 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  59                  struct nfs_fsinfo *info)
  60 {
  61         struct rpc_message msg = {
  62                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  63                 .rpc_argp       = fhandle,
  64                 .rpc_resp       = info,
  65         };
  66         int     status;
  67
  68         dprintk("%s: call  fsinfo\n", __func__);
  69         nfs_fattr_init(info->fattr);
  70         status = rpc_call_sync(client, &msg, 0);
  71         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  72         if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
  73                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  74                 msg.rpc_resp = info->fattr;
  75                 status = rpc_call_sync(client, &msg, 0);
  76                 dprintk("%s: reply getattr: %d\n", __func__, status);
  77         }
  78         return status;
  79 }
  80
  81 /*
  82  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  83  */
  84 static int
  85 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  86                    struct nfs_fsinfo *info)
  87 {
  88         int     status;
  89
  90         status = do_proc_get_root(server->client, fhandle, info);
  91         if (status && server->nfs_client->cl_rpcclient != server->client)
  92                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  93         return status;
  94 }
  95
  96 /*
  97  * One function for each procedure in the NFS protocol.
  98  */
  99 static int
 100 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 101                 struct nfs_fattr *fattr, struct nfs4_label *label)
 102 {
 103         struct rpc_message msg = {
 104                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 105                 .rpc_argp       = fhandle,
 106                 .rpc_resp       = fattr,
 107         };
 108         int     status;
 109
 110         dprintk("NFS call  getattr\n");
 111         nfs_fattr_init(fattr);
 112         status = rpc_call_sync(server->client, &msg, 0);
 113         dprintk("NFS reply getattr: %d\n", status);
 114         return status;
 115 }
 116
 117 static int
 118 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 119                         struct iattr *sattr)
 120 {
 121         struct inode *inode = dentry->d_inode;
 122         struct nfs3_sattrargs   arg = {
 123                 .fh             = NFS_FH(inode),
 124                 .sattr          = sattr,
 125         };
 126         struct rpc_message msg = {
 127                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 128                 .rpc_argp       = &arg,
 129                 .rpc_resp       = fattr,
 130         };
 131         int     status;
 132
 133         dprintk("NFS call  setattr\n");
 134         if (sattr->ia_valid & ATTR_FILE)
 135                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 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                  struct nfs4_label *label)
 148 {
 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                 .fh             = fhandle,
 156                 .fattr          = fattr
 157         };
 158         struct rpc_message msg = {
 159                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 160                 .rpc_argp       = &arg,
 161                 .rpc_resp       = &res,
 162         };
 163         int                     status;
 164
 165         dprintk("NFS call  lookup %s\n", name->name);
 166         res.dir_attr = nfs_alloc_fattr();
 167         if (res.dir_attr == NULL)
 168                 return -ENOMEM;
 169
 170         nfs_fattr_init(fattr);
 171         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 172         nfs_refresh_inode(dir, res.dir_attr);
 173         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 174                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 175                 msg.rpc_argp = fhandle;
 176                 msg.rpc_resp = fattr;
 177                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 178         }
 179         nfs_free_fattr(res.dir_attr);
 180         dprintk("NFS reply lookup: %d\n", status);
 181         return status;
 182 }
 183
 184 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 185 {
 186         struct nfs3_accessargs  arg = {
 187                 .fh             = NFS_FH(inode),
 188         };
 189         struct nfs3_accessres   res;
 190         struct rpc_message msg = {
 191                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 192                 .rpc_argp       = &arg,
 193                 .rpc_resp       = &res,
 194                 .rpc_cred       = entry->cred,
 195         };
 196         int mode = entry->mask;
 197         int status = -ENOMEM;
 198
 199         dprintk("NFS call  access\n");
 200
 201         if (mode & MAY_READ)
 202                 arg.access |= NFS3_ACCESS_READ;
 203         if (S_ISDIR(inode->i_mode)) {
 204                 if (mode & MAY_WRITE)
 205                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 206                 if (mode & MAY_EXEC)
 207                         arg.access |= NFS3_ACCESS_LOOKUP;
 208         } else {
 209                 if (mode & MAY_WRITE)
 210                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 211                 if (mode & MAY_EXEC)
 212                         arg.access |= NFS3_ACCESS_EXECUTE;
 213         }
 214
 215         res.fattr = nfs_alloc_fattr();
 216         if (res.fattr == NULL)
 217                 goto out;
 218
 219         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 220         nfs_refresh_inode(inode, res.fattr);
 221         if (status == 0) {
 222                 entry->mask = 0;
 223                 if (res.access & NFS3_ACCESS_READ)
 224                         entry->mask |= MAY_READ;
 225                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 226                         entry->mask |= MAY_WRITE;
 227                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 228                         entry->mask |= MAY_EXEC;
 229         }
 230         nfs_free_fattr(res.fattr);
 231 out:
 232         dprintk("NFS reply access: %d\n", status);
 233         return status;
 234 }
 235
 236 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 237                 unsigned int pgbase, unsigned int pglen)
 238 {
 239         struct nfs_fattr        *fattr;
 240         struct nfs3_readlinkargs args = {
 241                 .fh             = NFS_FH(inode),
 242                 .pgbase         = pgbase,
 243                 .pglen          = pglen,
 244                 .pages          = &page
 245         };
 246         struct rpc_message msg = {
 247                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 248                 .rpc_argp       = &args,
 249         };
 250         int status = -ENOMEM;
 251
 252         dprintk("NFS call  readlink\n");
 253         fattr = nfs_alloc_fattr();
 254         if (fattr == NULL)
 255                 goto out;
 256         msg.rpc_resp = fattr;
 257
 258         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 259         nfs_refresh_inode(inode, fattr);
 260         nfs_free_fattr(fattr);
 261 out:
 262         dprintk("NFS reply readlink: %d\n", status);
 263         return status;
 264 }
 265
 266 struct nfs3_createdata {
 267         struct rpc_message msg;
 268         union {
 269                 struct nfs3_createargs create;
 270                 struct nfs3_mkdirargs mkdir;
 271                 struct nfs3_symlinkargs symlink;
 272                 struct nfs3_mknodargs mknod;
 273         } arg;
 274         struct nfs3_diropres res;
 275         struct nfs_fh fh;
 276         struct nfs_fattr fattr;
 277         struct nfs_fattr dir_attr;
 278 };
 279
 280 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 281 {
 282         struct nfs3_createdata *data;
 283
 284         data = kzalloc(sizeof(*data), GFP_KERNEL);
 285         if (data != NULL) {
 286                 data->msg.rpc_argp = &data->arg;
 287                 data->msg.rpc_resp = &data->res;
 288                 data->res.fh = &data->fh;
 289                 data->res.fattr = &data->fattr;
 290                 data->res.dir_attr = &data->dir_attr;
 291                 nfs_fattr_init(data->res.fattr);
 292                 nfs_fattr_init(data->res.dir_attr);
 293         }
 294         return data;
 295 }
 296
 297 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 298 {
 299         int status;
 300
 301         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 302         nfs_post_op_update_inode(dir, data->res.dir_attr);
 303         if (status == 0)
 304                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 305         return status;
 306 }
 307
 308 static void nfs3_free_createdata(struct nfs3_createdata *data)
 309 {
 310         kfree(data);
 311 }
 312
 313 /*
 314  * Create a regular file.
 315  */
 316 static int
 317 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 318                  int flags)
 319 {
 320         struct nfs3_createdata *data;
 321         umode_t mode = sattr->ia_mode;
 322         int status = -ENOMEM;
 323
 324         dprintk("NFS call  create %pd\n", dentry);
 325
 326         data = nfs3_alloc_createdata();
 327         if (data == NULL)
 328                 goto out;
 329
 330         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 331         data->arg.create.fh = NFS_FH(dir);
 332         data->arg.create.name = dentry->d_name.name;
 333         data->arg.create.len = dentry->d_name.len;
 334         data->arg.create.sattr = sattr;
 335
 336         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 337         if (flags & O_EXCL) {
 338                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 339                 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
 340                 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
 341         }
 342
 343         sattr->ia_mode &= ~current_umask();
 344
 345         for (;;) {
 346                 status = nfs3_do_create(dir, dentry, data);
 347
 348                 if (status != -ENOTSUPP)
 349                         break;
 350                 /* If the server doesn't support the exclusive creation
 351                  * semantics, try again with simple 'guarded' mode. */
 352                 switch (data->arg.create.createmode) {
 353                         case NFS3_CREATE_EXCLUSIVE:
 354                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 355                                 break;
 356
 357                         case NFS3_CREATE_GUARDED:
 358                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 359                                 break;
 360
 361                         case NFS3_CREATE_UNCHECKED:
 362                                 goto out;
 363                 }
 364                 nfs_fattr_init(data->res.dir_attr);
 365                 nfs_fattr_init(data->res.fattr);
 366         }
 367
 368         if (status != 0)
 369                 goto out;
 370
 371         /* When we created the file with exclusive semantics, make
 372          * sure we set the attributes afterwards. */
 373         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 374                 dprintk("NFS call  setattr (post-create)\n");
 375
 376                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 377                         sattr->ia_valid |= ATTR_ATIME;
 378                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 379                         sattr->ia_valid |= ATTR_MTIME;
 380
 381                 /* Note: we could use a guarded setattr here, but I'm
 382                  * not sure this buys us anything (and I'd have
 383                  * to revamp the NFSv3 XDR code) */
 384                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 385                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 386                 dprintk("NFS reply setattr (post-create): %d\n", status);
 387                 if (status != 0)
 388                         goto out;
 389         }
 390         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 391 out:
 392         nfs3_free_createdata(data);
 393         dprintk("NFS reply create: %d\n", status);
 394         return status;
 395 }
 396
 397 static int
 398 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 399 {
 400         struct nfs_removeargs arg = {
 401                 .fh = NFS_FH(dir),
 402                 .name = *name,
 403         };
 404         struct nfs_removeres res;
 405         struct rpc_message msg = {
 406                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 407                 .rpc_argp = &arg,
 408                 .rpc_resp = &res,
 409         };
 410         int status = -ENOMEM;
 411
 412         dprintk("NFS call  remove %s\n", name->name);
 413         res.dir_attr = nfs_alloc_fattr();
 414         if (res.dir_attr == NULL)
 415                 goto out;
 416
 417         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 418         nfs_post_op_update_inode(dir, res.dir_attr);
 419         nfs_free_fattr(res.dir_attr);
 420 out:
 421         dprintk("NFS reply remove: %d\n", status);
 422         return status;
 423 }
 424
 425 static void
 426 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 427 {
 428         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 429 }
 430
 431 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 432 {
 433         rpc_call_start(task);
 434 }
 435
 436 static int
 437 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 438 {
 439         struct nfs_removeres *res;
 440         if (nfs3_async_handle_jukebox(task, dir))
 441                 return 0;
 442         res = task->tk_msg.rpc_resp;
 443         nfs_post_op_update_inode(dir, res->dir_attr);
 444         return 1;
 445 }
 446
 447 static void
 448 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 449 {
 450         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 451 }
 452
 453 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 454 {
 455         rpc_call_start(task);
 456 }
 457
 458 static int
 459 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 460                       struct inode *new_dir)
 461 {
 462         struct nfs_renameres *res;
 463
 464         if (nfs3_async_handle_jukebox(task, old_dir))
 465                 return 0;
 466         res = task->tk_msg.rpc_resp;
 467
 468         nfs_post_op_update_inode(old_dir, res->old_fattr);
 469         nfs_post_op_update_inode(new_dir, res->new_fattr);
 470         return 1;
 471 }
 472
 473 static int
 474 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 475                  struct inode *new_dir, struct qstr *new_name)
 476 {
 477         struct nfs_renameargs   arg = {
 478                 .old_dir        = NFS_FH(old_dir),
 479                 .old_name       = old_name,
 480                 .new_dir        = NFS_FH(new_dir),
 481                 .new_name       = new_name,
 482         };
 483         struct nfs_renameres res;
 484         struct rpc_message msg = {
 485                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 486                 .rpc_argp       = &arg,
 487                 .rpc_resp       = &res,
 488         };
 489         int status = -ENOMEM;
 490
 491         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 492
 493         res.old_fattr = nfs_alloc_fattr();
 494         res.new_fattr = nfs_alloc_fattr();
 495         if (res.old_fattr == NULL || res.new_fattr == NULL)
 496                 goto out;
 497
 498         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 499         nfs_post_op_update_inode(old_dir, res.old_fattr);
 500         nfs_post_op_update_inode(new_dir, res.new_fattr);
 501 out:
 502         nfs_free_fattr(res.old_fattr);
 503         nfs_free_fattr(res.new_fattr);
 504         dprintk("NFS reply rename: %d\n", status);
 505         return status;
 506 }
 507
 508 static int
 509 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 510 {
 511         struct nfs3_linkargs    arg = {
 512                 .fromfh         = NFS_FH(inode),
 513                 .tofh           = NFS_FH(dir),
 514                 .toname         = name->name,
 515                 .tolen          = name->len
 516         };
 517         struct nfs3_linkres     res;
 518         struct rpc_message msg = {
 519                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 520                 .rpc_argp       = &arg,
 521                 .rpc_resp       = &res,
 522         };
 523         int status = -ENOMEM;
 524
 525         dprintk("NFS call  link %s\n", name->name);
 526         res.fattr = nfs_alloc_fattr();
 527         res.dir_attr = nfs_alloc_fattr();
 528         if (res.fattr == NULL || res.dir_attr == NULL)
 529                 goto out;
 530
 531         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 532         nfs_post_op_update_inode(dir, res.dir_attr);
 533         nfs_post_op_update_inode(inode, res.fattr);
 534 out:
 535         nfs_free_fattr(res.dir_attr);
 536         nfs_free_fattr(res.fattr);
 537         dprintk("NFS reply link: %d\n", status);
 538         return status;
 539 }
 540
 541 static int
 542 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 543                   unsigned int len, struct iattr *sattr)
 544 {
 545         struct nfs3_createdata *data;
 546         int status = -ENOMEM;
 547
 548         if (len > NFS3_MAXPATHLEN)
 549                 return -ENAMETOOLONG;
 550
 551         dprintk("NFS call  symlink %pd\n", dentry);
 552
 553         data = nfs3_alloc_createdata();
 554         if (data == NULL)
 555                 goto out;
 556         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 557         data->arg.symlink.fromfh = NFS_FH(dir);
 558         data->arg.symlink.fromname = dentry->d_name.name;
 559         data->arg.symlink.fromlen = dentry->d_name.len;
 560         data->arg.symlink.pages = &page;
 561         data->arg.symlink.pathlen = len;
 562         data->arg.symlink.sattr = sattr;
 563
 564         status = nfs3_do_create(dir, dentry, data);
 565
 566         nfs3_free_createdata(data);
 567 out:
 568         dprintk("NFS reply symlink: %d\n", status);
 569         return status;
 570 }
 571
 572 static int
 573 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 574 {
 575         struct nfs3_createdata *data;
 576         umode_t mode = sattr->ia_mode;
 577         int status = -ENOMEM;
 578
 579         dprintk("NFS call  mkdir %pd\n", dentry);
 580
 581         sattr->ia_mode &= ~current_umask();
 582
 583         data = nfs3_alloc_createdata();
 584         if (data == NULL)
 585                 goto out;
 586
 587         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 588         data->arg.mkdir.fh = NFS_FH(dir);
 589         data->arg.mkdir.name = dentry->d_name.name;
 590         data->arg.mkdir.len = dentry->d_name.len;
 591         data->arg.mkdir.sattr = sattr;
 592
 593         status = nfs3_do_create(dir, dentry, data);
 594         if (status != 0)
 595                 goto out;
 596
 597         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 598 out:
 599         nfs3_free_createdata(data);
 600         dprintk("NFS reply mkdir: %d\n", status);
 601         return status;
 602 }
 603
 604 static int
 605 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 606 {
 607         struct nfs_fattr        *dir_attr;
 608         struct nfs3_diropargs   arg = {
 609                 .fh             = NFS_FH(dir),
 610                 .name           = name->name,
 611                 .len            = name->len
 612         };
 613         struct rpc_message msg = {
 614                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 615                 .rpc_argp       = &arg,
 616         };
 617         int status = -ENOMEM;
 618
 619         dprintk("NFS call  rmdir %s\n", name->name);
 620         dir_attr = nfs_alloc_fattr();
 621         if (dir_attr == NULL)
 622                 goto out;
 623
 624         msg.rpc_resp = dir_attr;
 625         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 626         nfs_post_op_update_inode(dir, dir_attr);
 627         nfs_free_fattr(dir_attr);
 628 out:
 629         dprintk("NFS reply rmdir: %d\n", status);
 630         return status;
 631 }
 632
 633 /*
 634  * The READDIR implementation is somewhat hackish - we pass the user buffer
 635  * to the encode function, which installs it in the receive iovec.
 636  * The decode function itself doesn't perform any decoding, it just makes
 637  * sure the reply is syntactically correct.
 638  *
 639  * Also note that this implementation handles both plain readdir and
 640  * readdirplus.
 641  */
 642 static int
 643 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 644                   u64 cookie, struct page **pages, unsigned int count, int plus)
 645 {
 646         struct inode            *dir = dentry->d_inode;
 647         __be32                  *verf = NFS_I(dir)->cookieverf;
 648         struct nfs3_readdirargs arg = {
 649                 .fh             = NFS_FH(dir),
 650                 .cookie         = cookie,
 651                 .verf           = {verf[0], verf[1]},
 652                 .plus           = plus,
 653                 .count          = count,
 654                 .pages          = pages
 655         };
 656         struct nfs3_readdirres  res = {
 657                 .verf           = verf,
 658                 .plus           = plus
 659         };
 660         struct rpc_message      msg = {
 661                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 662                 .rpc_argp       = &arg,
 663                 .rpc_resp       = &res,
 664                 .rpc_cred       = cred
 665         };
 666         int status = -ENOMEM;
 667
 668         if (plus)
 669                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 670
 671         dprintk("NFS call  readdir%s %d\n",
 672                         plus? "plus" : "", (unsigned int) cookie);
 673
 674         res.dir_attr = nfs_alloc_fattr();
 675         if (res.dir_attr == NULL)
 676                 goto out;
 677
 678         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 679
 680         nfs_invalidate_atime(dir);
 681         nfs_refresh_inode(dir, res.dir_attr);
 682
 683         nfs_free_fattr(res.dir_attr);
 684 out:
 685         dprintk("NFS reply readdir%s: %d\n",
 686                         plus? "plus" : "", status);
 687         return status;
 688 }
 689
 690 static int
 691 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 692                 dev_t rdev)
 693 {
 694         struct nfs3_createdata *data;
 695         umode_t mode = sattr->ia_mode;
 696         int status = -ENOMEM;
 697
 698         dprintk("NFS call  mknod %pd %u:%u\n", dentry,
 699                         MAJOR(rdev), MINOR(rdev));
 700
 701         sattr->ia_mode &= ~current_umask();
 702
 703         data = nfs3_alloc_createdata();
 704         if (data == NULL)
 705                 goto out;
 706
 707         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 708         data->arg.mknod.fh = NFS_FH(dir);
 709         data->arg.mknod.name = dentry->d_name.name;
 710         data->arg.mknod.len = dentry->d_name.len;
 711         data->arg.mknod.sattr = sattr;
 712         data->arg.mknod.rdev = rdev;
 713
 714         switch (sattr->ia_mode & S_IFMT) {
 715         case S_IFBLK:
 716                 data->arg.mknod.type = NF3BLK;
 717                 break;
 718         case S_IFCHR:
 719                 data->arg.mknod.type = NF3CHR;
 720                 break;
 721         case S_IFIFO:
 722                 data->arg.mknod.type = NF3FIFO;
 723                 break;
 724         case S_IFSOCK:
 725                 data->arg.mknod.type = NF3SOCK;
 726                 break;
 727         default:
 728                 status = -EINVAL;
 729                 goto out;
 730         }
 731
 732         status = nfs3_do_create(dir, dentry, data);
 733         if (status != 0)
 734                 goto out;
 735         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 736 out:
 737         nfs3_free_createdata(data);
 738         dprintk("NFS reply mknod: %d\n", status);
 739         return status;
 740 }
 741
 742 static int
 743 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 744                  struct nfs_fsstat *stat)
 745 {
 746         struct rpc_message msg = {
 747                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 748                 .rpc_argp       = fhandle,
 749                 .rpc_resp       = stat,
 750         };
 751         int     status;
 752
 753         dprintk("NFS call  fsstat\n");
 754         nfs_fattr_init(stat->fattr);
 755         status = rpc_call_sync(server->client, &msg, 0);
 756         dprintk("NFS reply fsstat: %d\n", status);
 757         return status;
 758 }
 759
 760 static int
 761 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 762                  struct nfs_fsinfo *info)
 763 {
 764         struct rpc_message msg = {
 765                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 766                 .rpc_argp       = fhandle,
 767                 .rpc_resp       = info,
 768         };
 769         int     status;
 770
 771         dprintk("NFS call  fsinfo\n");
 772         nfs_fattr_init(info->fattr);
 773         status = rpc_call_sync(client, &msg, 0);
 774         dprintk("NFS reply fsinfo: %d\n", status);
 775         return status;
 776 }
 777
 778 /*
 779  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 780  * nfs_create_server
 781  */
 782 static int
 783 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 784                    struct nfs_fsinfo *info)
 785 {
 786         int     status;
 787
 788         status = do_proc_fsinfo(server->client, fhandle, info);
 789         if (status && server->nfs_client->cl_rpcclient != server->client)
 790                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 791         return status;
 792 }
 793
 794 static int
 795 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 796                    struct nfs_pathconf *info)
 797 {
 798         struct rpc_message msg = {
 799                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 800                 .rpc_argp       = fhandle,
 801                 .rpc_resp       = info,
 802         };
 803         int     status;
 804
 805         dprintk("NFS call  pathconf\n");
 806         nfs_fattr_init(info->fattr);
 807         status = rpc_call_sync(server->client, &msg, 0);
 808         dprintk("NFS reply pathconf: %d\n", status);
 809         return status;
 810 }
 811
 812 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 813 {
 814         struct inode *inode = data->header->inode;
 815
 816         if (nfs3_async_handle_jukebox(task, inode))
 817                 return -EAGAIN;
 818
 819         nfs_invalidate_atime(inode);
 820         nfs_refresh_inode(inode, &data->fattr);
 821         return 0;
 822 }
 823
 824 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 825 {
 826         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 827 }
 828
 829 static int nfs3_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
 830 {
 831         rpc_call_start(task);
 832         return 0;
 833 }
 834
 835 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 836 {
 837         struct inode *inode = data->header->inode;
 838
 839         if (nfs3_async_handle_jukebox(task, inode))
 840                 return -EAGAIN;
 841         if (task->tk_status >= 0)
 842                 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
 843         return 0;
 844 }
 845
 846 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 847 {
 848         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 849 }
 850
 851 static int nfs3_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
 852 {
 853         rpc_call_start(task);
 854         return 0;
 855 }
 856
 857 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 858 {
 859         rpc_call_start(task);
 860 }
 861
 862 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
 863 {
 864         if (nfs3_async_handle_jukebox(task, data->inode))
 865                 return -EAGAIN;
 866         nfs_refresh_inode(data->inode, data->res.fattr);
 867         return 0;
 868 }
 869
 870 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 871 {
 872         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 873 }
 874
 875 static int
 876 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 877 {
 878         struct inode *inode = file_inode(filp);
 879
 880         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 881 }
 882
 883 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
 884 {
 885         return 0;
 886 }
 887
 888 static int nfs3_return_delegation(struct inode *inode)
 889 {
 890         nfs_wb_all(inode);
 891         return 0;
 892 }
 893
 894 static const struct inode_operations nfs3_dir_inode_operations = {
 895         .create         = nfs_create,
 896         .lookup         = nfs_lookup,
 897         .link           = nfs_link,
 898         .unlink         = nfs_unlink,
 899         .symlink        = nfs_symlink,
 900         .mkdir          = nfs_mkdir,
 901         .rmdir          = nfs_rmdir,
 902         .mknod          = nfs_mknod,
 903         .rename         = nfs_rename,
 904         .permission     = nfs_permission,
 905         .getattr        = nfs_getattr,
 906         .setattr        = nfs_setattr,
 907         .listxattr      = nfs3_listxattr,
 908         .getxattr       = nfs3_getxattr,
 909         .setxattr       = nfs3_setxattr,
 910         .removexattr    = nfs3_removexattr,
 911 };
 912
 913 static const struct inode_operations nfs3_file_inode_operations = {
 914         .permission     = nfs_permission,
 915         .getattr        = nfs_getattr,
 916         .setattr        = nfs_setattr,
 917         .listxattr      = nfs3_listxattr,
 918         .getxattr       = nfs3_getxattr,
 919         .setxattr       = nfs3_setxattr,
 920         .removexattr    = nfs3_removexattr,
 921 };
 922
 923 const struct nfs_rpc_ops nfs_v3_clientops = {
 924         .version        = 3,                    /* protocol version */
 925         .dentry_ops     = &nfs_dentry_operations,
 926         .dir_inode_ops  = &nfs3_dir_inode_operations,
 927         .file_inode_ops = &nfs3_file_inode_operations,
 928         .file_ops       = &nfs_file_operations,
 929         .getroot        = nfs3_proc_get_root,
 930         .submount       = nfs_submount,
 931         .try_mount      = nfs_try_mount,
 932         .getattr        = nfs3_proc_getattr,
 933         .setattr        = nfs3_proc_setattr,
 934         .lookup         = nfs3_proc_lookup,
 935         .access         = nfs3_proc_access,
 936         .readlink       = nfs3_proc_readlink,
 937         .create         = nfs3_proc_create,
 938         .remove         = nfs3_proc_remove,
 939         .unlink_setup   = nfs3_proc_unlink_setup,
 940         .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
 941         .unlink_done    = nfs3_proc_unlink_done,
 942         .rename         = nfs3_proc_rename,
 943         .rename_setup   = nfs3_proc_rename_setup,
 944         .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
 945         .rename_done    = nfs3_proc_rename_done,
 946         .link           = nfs3_proc_link,
 947         .symlink        = nfs3_proc_symlink,
 948         .mkdir          = nfs3_proc_mkdir,
 949         .rmdir          = nfs3_proc_rmdir,
 950         .readdir        = nfs3_proc_readdir,
 951         .mknod          = nfs3_proc_mknod,
 952         .statfs         = nfs3_proc_statfs,
 953         .fsinfo         = nfs3_proc_fsinfo,
 954         .pathconf       = nfs3_proc_pathconf,
 955         .decode_dirent  = nfs3_decode_dirent,
 956         .read_setup     = nfs3_proc_read_setup,
 957         .read_pageio_init = nfs_pageio_init_read,
 958         .read_rpc_prepare = nfs3_proc_read_rpc_prepare,
 959         .read_done      = nfs3_read_done,
 960         .write_setup    = nfs3_proc_write_setup,
 961         .write_pageio_init = nfs_pageio_init_write,
 962         .write_rpc_prepare = nfs3_proc_write_rpc_prepare,
 963         .write_done     = nfs3_write_done,
 964         .commit_setup   = nfs3_proc_commit_setup,
 965         .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
 966         .commit_done    = nfs3_commit_done,
 967         .lock           = nfs3_proc_lock,
 968         .clear_acl_cache = nfs3_forget_cached_acls,
 969         .close_context  = nfs_close_context,
 970         .have_delegation = nfs3_have_delegation,
 971         .return_delegation = nfs3_return_delegation,
 972         .alloc_client   = nfs_alloc_client,
 973         .init_client    = nfs_init_client,
 974         .free_client    = nfs_free_client,
 975         .create_server  = nfs3_create_server,
 976         .clone_server   = nfs3_clone_server,
 977 };