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 and EKEYEXPIRED 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 && res != -EKEYEXPIRED)
  35                         break;
  36                 freezable_schedule_timeout_killable(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 && task->tk_status != -EKEYEXPIRED)
  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 (!(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)
 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 rpc_clnt *clnt, struct inode *dir, struct qstr *name,
 146                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 147 {
 148         struct nfs3_diropargs   arg = {
 149                 .fh             = NFS_FH(dir),
 150                 .name           = name->name,
 151                 .len            = name->len
 152         };
 153         struct nfs3_diropres    res = {
 154                 .fh             = fhandle,
 155                 .fattr          = fattr
 156         };
 157         struct rpc_message msg = {
 158                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 159                 .rpc_argp       = &arg,
 160                 .rpc_resp       = &res,
 161         };
 162         int                     status;
 163
 164         dprintk("NFS call  lookup %s\n", name->name);
 165         res.dir_attr = nfs_alloc_fattr();
 166         if (res.dir_attr == NULL)
 167                 return -ENOMEM;
 168
 169         nfs_fattr_init(fattr);
 170         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 171         nfs_refresh_inode(dir, res.dir_attr);
 172         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 173                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 174                 msg.rpc_argp = fhandle;
 175                 msg.rpc_resp = fattr;
 176                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 177         }
 178         nfs_free_fattr(res.dir_attr);
 179         dprintk("NFS reply lookup: %d\n", status);
 180         return status;
 181 }
 182
 183 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 184 {
 185         struct nfs3_accessargs  arg = {
 186                 .fh             = NFS_FH(inode),
 187         };
 188         struct nfs3_accessres   res;
 189         struct rpc_message msg = {
 190                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 191                 .rpc_argp       = &arg,
 192                 .rpc_resp       = &res,
 193                 .rpc_cred       = entry->cred,
 194         };
 195         int mode = entry->mask;
 196         int status = -ENOMEM;
 197
 198         dprintk("NFS call  access\n");
 199
 200         if (mode & MAY_READ)
 201                 arg.access |= NFS3_ACCESS_READ;
 202         if (S_ISDIR(inode->i_mode)) {
 203                 if (mode & MAY_WRITE)
 204                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 205                 if (mode & MAY_EXEC)
 206                         arg.access |= NFS3_ACCESS_LOOKUP;
 207         } else {
 208                 if (mode & MAY_WRITE)
 209                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 210                 if (mode & MAY_EXEC)
 211                         arg.access |= NFS3_ACCESS_EXECUTE;
 212         }
 213
 214         res.fattr = nfs_alloc_fattr();
 215         if (res.fattr == NULL)
 216                 goto out;
 217
 218         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 219         nfs_refresh_inode(inode, res.fattr);
 220         if (status == 0) {
 221                 entry->mask = 0;
 222                 if (res.access & NFS3_ACCESS_READ)
 223                         entry->mask |= MAY_READ;
 224                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 225                         entry->mask |= MAY_WRITE;
 226                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 227                         entry->mask |= MAY_EXEC;
 228         }
 229         nfs_free_fattr(res.fattr);
 230 out:
 231         dprintk("NFS reply access: %d\n", status);
 232         return status;
 233 }
 234
 235 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 236                 unsigned int pgbase, unsigned int pglen)
 237 {
 238         struct nfs_fattr        *fattr;
 239         struct nfs3_readlinkargs args = {
 240                 .fh             = NFS_FH(inode),
 241                 .pgbase         = pgbase,
 242                 .pglen          = pglen,
 243                 .pages          = &page
 244         };
 245         struct rpc_message msg = {
 246                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 247                 .rpc_argp       = &args,
 248         };
 249         int status = -ENOMEM;
 250
 251         dprintk("NFS call  readlink\n");
 252         fattr = nfs_alloc_fattr();
 253         if (fattr == NULL)
 254                 goto out;
 255         msg.rpc_resp = fattr;
 256
 257         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 258         nfs_refresh_inode(inode, fattr);
 259         nfs_free_fattr(fattr);
 260 out:
 261         dprintk("NFS reply readlink: %d\n", status);
 262         return status;
 263 }
 264
 265 struct nfs3_createdata {
 266         struct rpc_message msg;
 267         union {
 268                 struct nfs3_createargs create;
 269                 struct nfs3_mkdirargs mkdir;
 270                 struct nfs3_symlinkargs symlink;
 271                 struct nfs3_mknodargs mknod;
 272         } arg;
 273         struct nfs3_diropres res;
 274         struct nfs_fh fh;
 275         struct nfs_fattr fattr;
 276         struct nfs_fattr dir_attr;
 277 };
 278
 279 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 280 {
 281         struct nfs3_createdata *data;
 282
 283         data = kzalloc(sizeof(*data), GFP_KERNEL);
 284         if (data != NULL) {
 285                 data->msg.rpc_argp = &data->arg;
 286                 data->msg.rpc_resp = &data->res;
 287                 data->res.fh = &data->fh;
 288                 data->res.fattr = &data->fattr;
 289                 data->res.dir_attr = &data->dir_attr;
 290                 nfs_fattr_init(data->res.fattr);
 291                 nfs_fattr_init(data->res.dir_attr);
 292         }
 293         return data;
 294 }
 295
 296 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 297 {
 298         int status;
 299
 300         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 301         nfs_post_op_update_inode(dir, data->res.dir_attr);
 302         if (status == 0)
 303                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
 304         return status;
 305 }
 306
 307 static void nfs3_free_createdata(struct nfs3_createdata *data)
 308 {
 309         kfree(data);
 310 }
 311
 312 /*
 313  * Create a regular file.
 314  */
 315 static int
 316 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 317                  int flags, struct nfs_open_context *ctx)
 318 {
 319         struct nfs3_createdata *data;
 320         umode_t mode = sattr->ia_mode;
 321         int status = -ENOMEM;
 322
 323         dprintk("NFS call  create %s\n", dentry->d_name.name);
 324
 325         data = nfs3_alloc_createdata();
 326         if (data == NULL)
 327                 goto out;
 328
 329         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 330         data->arg.create.fh = NFS_FH(dir);
 331         data->arg.create.name = dentry->d_name.name;
 332         data->arg.create.len = dentry->d_name.len;
 333         data->arg.create.sattr = sattr;
 334
 335         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 336         if (flags & O_EXCL) {
 337                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 338                 data->arg.create.verifier[0] = jiffies;
 339                 data->arg.create.verifier[1] = current->pid;
 340         }
 341
 342         sattr->ia_mode &= ~current_umask();
 343
 344         for (;;) {
 345                 status = nfs3_do_create(dir, dentry, data);
 346
 347                 if (status != -ENOTSUPP)
 348                         break;
 349                 /* If the server doesn't support the exclusive creation
 350                  * semantics, try again with simple 'guarded' mode. */
 351                 switch (data->arg.create.createmode) {
 352                         case NFS3_CREATE_EXCLUSIVE:
 353                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 354                                 break;
 355
 356                         case NFS3_CREATE_GUARDED:
 357                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 358                                 break;
 359
 360                         case NFS3_CREATE_UNCHECKED:
 361                                 goto out;
 362                 }
 363                 nfs_fattr_init(data->res.dir_attr);
 364                 nfs_fattr_init(data->res.fattr);
 365         }
 366
 367         if (status != 0)
 368                 goto out;
 369
 370         /* When we created the file with exclusive semantics, make
 371          * sure we set the attributes afterwards. */
 372         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 373                 dprintk("NFS call  setattr (post-create)\n");
 374
 375                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 376                         sattr->ia_valid |= ATTR_ATIME;
 377                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 378                         sattr->ia_valid |= ATTR_MTIME;
 379
 380                 /* Note: we could use a guarded setattr here, but I'm
 381                  * not sure this buys us anything (and I'd have
 382                  * to revamp the NFSv3 XDR code) */
 383                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 384                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 385                 dprintk("NFS reply setattr (post-create): %d\n", status);
 386                 if (status != 0)
 387                         goto out;
 388         }
 389         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 390 out:
 391         nfs3_free_createdata(data);
 392         dprintk("NFS reply create: %d\n", status);
 393         return status;
 394 }
 395
 396 static int
 397 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 398 {
 399         struct nfs_removeargs arg = {
 400                 .fh = NFS_FH(dir),
 401                 .name.len = name->len,
 402                 .name.name = 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 int
 432 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 433 {
 434         struct nfs_removeres *res;
 435         if (nfs3_async_handle_jukebox(task, dir))
 436                 return 0;
 437         res = task->tk_msg.rpc_resp;
 438         nfs_post_op_update_inode(dir, res->dir_attr);
 439         return 1;
 440 }
 441
 442 static void
 443 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 444 {
 445         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 446 }
 447
 448 static int
 449 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 450                       struct inode *new_dir)
 451 {
 452         struct nfs_renameres *res;
 453
 454         if (nfs3_async_handle_jukebox(task, old_dir))
 455                 return 0;
 456         res = task->tk_msg.rpc_resp;
 457
 458         nfs_post_op_update_inode(old_dir, res->old_fattr);
 459         nfs_post_op_update_inode(new_dir, res->new_fattr);
 460         return 1;
 461 }
 462
 463 static int
 464 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 465                  struct inode *new_dir, struct qstr *new_name)
 466 {
 467         struct nfs_renameargs   arg = {
 468                 .old_dir        = NFS_FH(old_dir),
 469                 .old_name       = old_name,
 470                 .new_dir        = NFS_FH(new_dir),
 471                 .new_name       = new_name,
 472         };
 473         struct nfs_renameres res;
 474         struct rpc_message msg = {
 475                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 476                 .rpc_argp       = &arg,
 477                 .rpc_resp       = &res,
 478         };
 479         int status = -ENOMEM;
 480
 481         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 482
 483         res.old_fattr = nfs_alloc_fattr();
 484         res.new_fattr = nfs_alloc_fattr();
 485         if (res.old_fattr == NULL || res.new_fattr == NULL)
 486                 goto out;
 487
 488         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 489         nfs_post_op_update_inode(old_dir, res.old_fattr);
 490         nfs_post_op_update_inode(new_dir, res.new_fattr);
 491 out:
 492         nfs_free_fattr(res.old_fattr);
 493         nfs_free_fattr(res.new_fattr);
 494         dprintk("NFS reply rename: %d\n", status);
 495         return status;
 496 }
 497
 498 static int
 499 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 500 {
 501         struct nfs3_linkargs    arg = {
 502                 .fromfh         = NFS_FH(inode),
 503                 .tofh           = NFS_FH(dir),
 504                 .toname         = name->name,
 505                 .tolen          = name->len
 506         };
 507         struct nfs3_linkres     res;
 508         struct rpc_message msg = {
 509                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 510                 .rpc_argp       = &arg,
 511                 .rpc_resp       = &res,
 512         };
 513         int status = -ENOMEM;
 514
 515         dprintk("NFS call  link %s\n", name->name);
 516         res.fattr = nfs_alloc_fattr();
 517         res.dir_attr = nfs_alloc_fattr();
 518         if (res.fattr == NULL || res.dir_attr == NULL)
 519                 goto out;
 520
 521         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 522         nfs_post_op_update_inode(dir, res.dir_attr);
 523         nfs_post_op_update_inode(inode, res.fattr);
 524 out:
 525         nfs_free_fattr(res.dir_attr);
 526         nfs_free_fattr(res.fattr);
 527         dprintk("NFS reply link: %d\n", status);
 528         return status;
 529 }
 530
 531 static int
 532 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 533                   unsigned int len, struct iattr *sattr)
 534 {
 535         struct nfs3_createdata *data;
 536         int status = -ENOMEM;
 537
 538         if (len > NFS3_MAXPATHLEN)
 539                 return -ENAMETOOLONG;
 540
 541         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 542
 543         data = nfs3_alloc_createdata();
 544         if (data == NULL)
 545                 goto out;
 546         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 547         data->arg.symlink.fromfh = NFS_FH(dir);
 548         data->arg.symlink.fromname = dentry->d_name.name;
 549         data->arg.symlink.fromlen = dentry->d_name.len;
 550         data->arg.symlink.pages = &page;
 551         data->arg.symlink.pathlen = len;
 552         data->arg.symlink.sattr = sattr;
 553
 554         status = nfs3_do_create(dir, dentry, data);
 555
 556         nfs3_free_createdata(data);
 557 out:
 558         dprintk("NFS reply symlink: %d\n", status);
 559         return status;
 560 }
 561
 562 static int
 563 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 564 {
 565         struct nfs3_createdata *data;
 566         umode_t mode = sattr->ia_mode;
 567         int status = -ENOMEM;
 568
 569         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 570
 571         sattr->ia_mode &= ~current_umask();
 572
 573         data = nfs3_alloc_createdata();
 574         if (data == NULL)
 575                 goto out;
 576
 577         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 578         data->arg.mkdir.fh = NFS_FH(dir);
 579         data->arg.mkdir.name = dentry->d_name.name;
 580         data->arg.mkdir.len = dentry->d_name.len;
 581         data->arg.mkdir.sattr = sattr;
 582
 583         status = nfs3_do_create(dir, dentry, data);
 584         if (status != 0)
 585                 goto out;
 586
 587         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 588 out:
 589         nfs3_free_createdata(data);
 590         dprintk("NFS reply mkdir: %d\n", status);
 591         return status;
 592 }
 593
 594 static int
 595 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 596 {
 597         struct nfs_fattr        *dir_attr;
 598         struct nfs3_diropargs   arg = {
 599                 .fh             = NFS_FH(dir),
 600                 .name           = name->name,
 601                 .len            = name->len
 602         };
 603         struct rpc_message msg = {
 604                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 605                 .rpc_argp       = &arg,
 606         };
 607         int status = -ENOMEM;
 608
 609         dprintk("NFS call  rmdir %s\n", name->name);
 610         dir_attr = nfs_alloc_fattr();
 611         if (dir_attr == NULL)
 612                 goto out;
 613
 614         msg.rpc_resp = dir_attr;
 615         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 616         nfs_post_op_update_inode(dir, dir_attr);
 617         nfs_free_fattr(dir_attr);
 618 out:
 619         dprintk("NFS reply rmdir: %d\n", status);
 620         return status;
 621 }
 622
 623 /*
 624  * The READDIR implementation is somewhat hackish - we pass the user buffer
 625  * to the encode function, which installs it in the receive iovec.
 626  * The decode function itself doesn't perform any decoding, it just makes
 627  * sure the reply is syntactically correct.
 628  *
 629  * Also note that this implementation handles both plain readdir and
 630  * readdirplus.
 631  */
 632 static int
 633 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 634                   u64 cookie, struct page **pages, unsigned int count, int plus)
 635 {
 636         struct inode            *dir = dentry->d_inode;
 637         __be32                  *verf = NFS_COOKIEVERF(dir);
 638         struct nfs3_readdirargs arg = {
 639                 .fh             = NFS_FH(dir),
 640                 .cookie         = cookie,
 641                 .verf           = {verf[0], verf[1]},
 642                 .plus           = plus,
 643                 .count          = count,
 644                 .pages          = pages
 645         };
 646         struct nfs3_readdirres  res = {
 647                 .verf           = verf,
 648                 .plus           = plus
 649         };
 650         struct rpc_message      msg = {
 651                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 652                 .rpc_argp       = &arg,
 653                 .rpc_resp       = &res,
 654                 .rpc_cred       = cred
 655         };
 656         int status = -ENOMEM;
 657
 658         if (plus)
 659                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 660
 661         dprintk("NFS call  readdir%s %d\n",
 662                         plus? "plus" : "", (unsigned int) cookie);
 663
 664         res.dir_attr = nfs_alloc_fattr();
 665         if (res.dir_attr == NULL)
 666                 goto out;
 667
 668         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 669
 670         nfs_invalidate_atime(dir);
 671         nfs_refresh_inode(dir, res.dir_attr);
 672
 673         nfs_free_fattr(res.dir_attr);
 674 out:
 675         dprintk("NFS reply readdir%s: %d\n",
 676                         plus? "plus" : "", status);
 677         return status;
 678 }
 679
 680 static int
 681 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 682                 dev_t rdev)
 683 {
 684         struct nfs3_createdata *data;
 685         umode_t mode = sattr->ia_mode;
 686         int status = -ENOMEM;
 687
 688         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 689                         MAJOR(rdev), MINOR(rdev));
 690
 691         sattr->ia_mode &= ~current_umask();
 692
 693         data = nfs3_alloc_createdata();
 694         if (data == NULL)
 695                 goto out;
 696
 697         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 698         data->arg.mknod.fh = NFS_FH(dir);
 699         data->arg.mknod.name = dentry->d_name.name;
 700         data->arg.mknod.len = dentry->d_name.len;
 701         data->arg.mknod.sattr = sattr;
 702         data->arg.mknod.rdev = rdev;
 703
 704         switch (sattr->ia_mode & S_IFMT) {
 705         case S_IFBLK:
 706                 data->arg.mknod.type = NF3BLK;
 707                 break;
 708         case S_IFCHR:
 709                 data->arg.mknod.type = NF3CHR;
 710                 break;
 711         case S_IFIFO:
 712                 data->arg.mknod.type = NF3FIFO;
 713                 break;
 714         case S_IFSOCK:
 715                 data->arg.mknod.type = NF3SOCK;
 716                 break;
 717         default:
 718                 status = -EINVAL;
 719                 goto out;
 720         }
 721
 722         status = nfs3_do_create(dir, dentry, data);
 723         if (status != 0)
 724                 goto out;
 725         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 726 out:
 727         nfs3_free_createdata(data);
 728         dprintk("NFS reply mknod: %d\n", status);
 729         return status;
 730 }
 731
 732 static int
 733 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 734                  struct nfs_fsstat *stat)
 735 {
 736         struct rpc_message msg = {
 737                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 738                 .rpc_argp       = fhandle,
 739                 .rpc_resp       = stat,
 740         };
 741         int     status;
 742
 743         dprintk("NFS call  fsstat\n");
 744         nfs_fattr_init(stat->fattr);
 745         status = rpc_call_sync(server->client, &msg, 0);
 746         dprintk("NFS reply fsstat: %d\n", status);
 747         return status;
 748 }
 749
 750 static int
 751 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 752                  struct nfs_fsinfo *info)
 753 {
 754         struct rpc_message msg = {
 755                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 756                 .rpc_argp       = fhandle,
 757                 .rpc_resp       = info,
 758         };
 759         int     status;
 760
 761         dprintk("NFS call  fsinfo\n");
 762         nfs_fattr_init(info->fattr);
 763         status = rpc_call_sync(client, &msg, 0);
 764         dprintk("NFS reply fsinfo: %d\n", status);
 765         return status;
 766 }
 767
 768 /*
 769  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 770  * nfs_create_server
 771  */
 772 static int
 773 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 774                    struct nfs_fsinfo *info)
 775 {
 776         int     status;
 777
 778         status = do_proc_fsinfo(server->client, fhandle, info);
 779         if (status && server->nfs_client->cl_rpcclient != server->client)
 780                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 781         return status;
 782 }
 783
 784 static int
 785 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 786                    struct nfs_pathconf *info)
 787 {
 788         struct rpc_message msg = {
 789                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 790                 .rpc_argp       = fhandle,
 791                 .rpc_resp       = info,
 792         };
 793         int     status;
 794
 795         dprintk("NFS call  pathconf\n");
 796         nfs_fattr_init(info->fattr);
 797         status = rpc_call_sync(server->client, &msg, 0);
 798         dprintk("NFS reply pathconf: %d\n", status);
 799         return status;
 800 }
 801
 802 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 803 {
 804         if (nfs3_async_handle_jukebox(task, data->inode))
 805                 return -EAGAIN;
 806
 807         nfs_invalidate_atime(data->inode);
 808         nfs_refresh_inode(data->inode, &data->fattr);
 809         return 0;
 810 }
 811
 812 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 813 {
 814         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 815 }
 816
 817 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 818 {
 819         if (nfs3_async_handle_jukebox(task, data->inode))
 820                 return -EAGAIN;
 821         if (task->tk_status >= 0)
 822                 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
 823         return 0;
 824 }
 825
 826 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 827 {
 828         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 829 }
 830
 831 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 832 {
 833         if (nfs3_async_handle_jukebox(task, data->inode))
 834                 return -EAGAIN;
 835         nfs_refresh_inode(data->inode, data->res.fattr);
 836         return 0;
 837 }
 838
 839 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 840 {
 841         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 842 }
 843
 844 static int
 845 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 846 {
 847         struct inode *inode = filp->f_path.dentry->d_inode;
 848
 849         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 850 }
 851
 852 const struct nfs_rpc_ops nfs_v3_clientops = {
 853         .version        = 3,                    /* protocol version */
 854         .dentry_ops     = &nfs_dentry_operations,
 855         .dir_inode_ops  = &nfs3_dir_inode_operations,
 856         .file_inode_ops = &nfs3_file_inode_operations,
 857         .file_ops       = &nfs_file_operations,
 858         .getroot        = nfs3_proc_get_root,
 859         .getattr        = nfs3_proc_getattr,
 860         .setattr        = nfs3_proc_setattr,
 861         .lookup         = nfs3_proc_lookup,
 862         .access         = nfs3_proc_access,
 863         .readlink       = nfs3_proc_readlink,
 864         .create         = nfs3_proc_create,
 865         .remove         = nfs3_proc_remove,
 866         .unlink_setup   = nfs3_proc_unlink_setup,
 867         .unlink_done    = nfs3_proc_unlink_done,
 868         .rename         = nfs3_proc_rename,
 869         .rename_setup   = nfs3_proc_rename_setup,
 870         .rename_done    = nfs3_proc_rename_done,
 871         .link           = nfs3_proc_link,
 872         .symlink        = nfs3_proc_symlink,
 873         .mkdir          = nfs3_proc_mkdir,
 874         .rmdir          = nfs3_proc_rmdir,
 875         .readdir        = nfs3_proc_readdir,
 876         .mknod          = nfs3_proc_mknod,
 877         .statfs         = nfs3_proc_statfs,
 878         .fsinfo         = nfs3_proc_fsinfo,
 879         .pathconf       = nfs3_proc_pathconf,
 880         .decode_dirent  = nfs3_decode_dirent,
 881         .read_setup     = nfs3_proc_read_setup,
 882         .read_done      = nfs3_read_done,
 883         .write_setup    = nfs3_proc_write_setup,
 884         .write_done     = nfs3_write_done,
 885         .commit_setup   = nfs3_proc_commit_setup,
 886         .commit_done    = nfs3_commit_done,
 887         .lock           = nfs3_proc_lock,
 888         .clear_acl_cache = nfs3_forget_cached_acls,
 889         .close_context  = nfs_close_context,
 890         .init_client    = nfs_init_client,
 891 };