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(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)
 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 {
 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)
 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 = *name,
 402         };
 403         struct nfs_removeres res;
 404         struct rpc_message msg = {
 405                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 406                 .rpc_argp = &arg,
 407                 .rpc_resp = &res,
 408         };
 409         int status = -ENOMEM;
 410
 411         dprintk("NFS call  remove %s\n", name->name);
 412         res.dir_attr = nfs_alloc_fattr();
 413         if (res.dir_attr == NULL)
 414                 goto out;
 415
 416         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 417         nfs_post_op_update_inode(dir, res.dir_attr);
 418         nfs_free_fattr(res.dir_attr);
 419 out:
 420         dprintk("NFS reply remove: %d\n", status);
 421         return status;
 422 }
 423
 424 static void
 425 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 426 {
 427         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 428 }
 429
 430 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 431 {
 432         rpc_call_start(task);
 433 }
 434
 435 static int
 436 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 437 {
 438         struct nfs_removeres *res;
 439         if (nfs3_async_handle_jukebox(task, dir))
 440                 return 0;
 441         res = task->tk_msg.rpc_resp;
 442         nfs_post_op_update_inode(dir, res->dir_attr);
 443         return 1;
 444 }
 445
 446 static void
 447 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 448 {
 449         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 450 }
 451
 452 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 453 {
 454         rpc_call_start(task);
 455 }
 456
 457 static int
 458 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 459                       struct inode *new_dir)
 460 {
 461         struct nfs_renameres *res;
 462
 463         if (nfs3_async_handle_jukebox(task, old_dir))
 464                 return 0;
 465         res = task->tk_msg.rpc_resp;
 466
 467         nfs_post_op_update_inode(old_dir, res->old_fattr);
 468         nfs_post_op_update_inode(new_dir, res->new_fattr);
 469         return 1;
 470 }
 471
 472 static int
 473 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 474                  struct inode *new_dir, struct qstr *new_name)
 475 {
 476         struct nfs_renameargs   arg = {
 477                 .old_dir        = NFS_FH(old_dir),
 478                 .old_name       = old_name,
 479                 .new_dir        = NFS_FH(new_dir),
 480                 .new_name       = new_name,
 481         };
 482         struct nfs_renameres res;
 483         struct rpc_message msg = {
 484                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 485                 .rpc_argp       = &arg,
 486                 .rpc_resp       = &res,
 487         };
 488         int status = -ENOMEM;
 489
 490         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 491
 492         res.old_fattr = nfs_alloc_fattr();
 493         res.new_fattr = nfs_alloc_fattr();
 494         if (res.old_fattr == NULL || res.new_fattr == NULL)
 495                 goto out;
 496
 497         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 498         nfs_post_op_update_inode(old_dir, res.old_fattr);
 499         nfs_post_op_update_inode(new_dir, res.new_fattr);
 500 out:
 501         nfs_free_fattr(res.old_fattr);
 502         nfs_free_fattr(res.new_fattr);
 503         dprintk("NFS reply rename: %d\n", status);
 504         return status;
 505 }
 506
 507 static int
 508 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 509 {
 510         struct nfs3_linkargs    arg = {
 511                 .fromfh         = NFS_FH(inode),
 512                 .tofh           = NFS_FH(dir),
 513                 .toname         = name->name,
 514                 .tolen          = name->len
 515         };
 516         struct nfs3_linkres     res;
 517         struct rpc_message msg = {
 518                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 519                 .rpc_argp       = &arg,
 520                 .rpc_resp       = &res,
 521         };
 522         int status = -ENOMEM;
 523
 524         dprintk("NFS call  link %s\n", name->name);
 525         res.fattr = nfs_alloc_fattr();
 526         res.dir_attr = nfs_alloc_fattr();
 527         if (res.fattr == NULL || res.dir_attr == NULL)
 528                 goto out;
 529
 530         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 531         nfs_post_op_update_inode(dir, res.dir_attr);
 532         nfs_post_op_update_inode(inode, res.fattr);
 533 out:
 534         nfs_free_fattr(res.dir_attr);
 535         nfs_free_fattr(res.fattr);
 536         dprintk("NFS reply link: %d\n", status);
 537         return status;
 538 }
 539
 540 static int
 541 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 542                   unsigned int len, struct iattr *sattr)
 543 {
 544         struct nfs3_createdata *data;
 545         int status = -ENOMEM;
 546
 547         if (len > NFS3_MAXPATHLEN)
 548                 return -ENAMETOOLONG;
 549
 550         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 551
 552         data = nfs3_alloc_createdata();
 553         if (data == NULL)
 554                 goto out;
 555         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 556         data->arg.symlink.fromfh = NFS_FH(dir);
 557         data->arg.symlink.fromname = dentry->d_name.name;
 558         data->arg.symlink.fromlen = dentry->d_name.len;
 559         data->arg.symlink.pages = &page;
 560         data->arg.symlink.pathlen = len;
 561         data->arg.symlink.sattr = sattr;
 562
 563         status = nfs3_do_create(dir, dentry, data);
 564
 565         nfs3_free_createdata(data);
 566 out:
 567         dprintk("NFS reply symlink: %d\n", status);
 568         return status;
 569 }
 570
 571 static int
 572 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 573 {
 574         struct nfs3_createdata *data;
 575         umode_t mode = sattr->ia_mode;
 576         int status = -ENOMEM;
 577
 578         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 579
 580         sattr->ia_mode &= ~current_umask();
 581
 582         data = nfs3_alloc_createdata();
 583         if (data == NULL)
 584                 goto out;
 585
 586         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 587         data->arg.mkdir.fh = NFS_FH(dir);
 588         data->arg.mkdir.name = dentry->d_name.name;
 589         data->arg.mkdir.len = dentry->d_name.len;
 590         data->arg.mkdir.sattr = sattr;
 591
 592         status = nfs3_do_create(dir, dentry, data);
 593         if (status != 0)
 594                 goto out;
 595
 596         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 597 out:
 598         nfs3_free_createdata(data);
 599         dprintk("NFS reply mkdir: %d\n", status);
 600         return status;
 601 }
 602
 603 static int
 604 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 605 {
 606         struct nfs_fattr        *dir_attr;
 607         struct nfs3_diropargs   arg = {
 608                 .fh             = NFS_FH(dir),
 609                 .name           = name->name,
 610                 .len            = name->len
 611         };
 612         struct rpc_message msg = {
 613                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 614                 .rpc_argp       = &arg,
 615         };
 616         int status = -ENOMEM;
 617
 618         dprintk("NFS call  rmdir %s\n", name->name);
 619         dir_attr = nfs_alloc_fattr();
 620         if (dir_attr == NULL)
 621                 goto out;
 622
 623         msg.rpc_resp = dir_attr;
 624         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 625         nfs_post_op_update_inode(dir, dir_attr);
 626         nfs_free_fattr(dir_attr);
 627 out:
 628         dprintk("NFS reply rmdir: %d\n", status);
 629         return status;
 630 }
 631
 632 /*
 633  * The READDIR implementation is somewhat hackish - we pass the user buffer
 634  * to the encode function, which installs it in the receive iovec.
 635  * The decode function itself doesn't perform any decoding, it just makes
 636  * sure the reply is syntactically correct.
 637  *
 638  * Also note that this implementation handles both plain readdir and
 639  * readdirplus.
 640  */
 641 static int
 642 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 643                   u64 cookie, struct page **pages, unsigned int count, int plus)
 644 {
 645         struct inode            *dir = dentry->d_inode;
 646         __be32                  *verf = NFS_I(dir)->cookieverf;
 647         struct nfs3_readdirargs arg = {
 648                 .fh             = NFS_FH(dir),
 649                 .cookie         = cookie,
 650                 .verf           = {verf[0], verf[1]},
 651                 .plus           = plus,
 652                 .count          = count,
 653                 .pages          = pages
 654         };
 655         struct nfs3_readdirres  res = {
 656                 .verf           = verf,
 657                 .plus           = plus
 658         };
 659         struct rpc_message      msg = {
 660                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 661                 .rpc_argp       = &arg,
 662                 .rpc_resp       = &res,
 663                 .rpc_cred       = cred
 664         };
 665         int status = -ENOMEM;
 666
 667         if (plus)
 668                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 669
 670         dprintk("NFS call  readdir%s %d\n",
 671                         plus? "plus" : "", (unsigned int) cookie);
 672
 673         res.dir_attr = nfs_alloc_fattr();
 674         if (res.dir_attr == NULL)
 675                 goto out;
 676
 677         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 678
 679         nfs_invalidate_atime(dir);
 680         nfs_refresh_inode(dir, res.dir_attr);
 681
 682         nfs_free_fattr(res.dir_attr);
 683 out:
 684         dprintk("NFS reply readdir%s: %d\n",
 685                         plus? "plus" : "", status);
 686         return status;
 687 }
 688
 689 static int
 690 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 691                 dev_t rdev)
 692 {
 693         struct nfs3_createdata *data;
 694         umode_t mode = sattr->ia_mode;
 695         int status = -ENOMEM;
 696
 697         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 698                         MAJOR(rdev), MINOR(rdev));
 699
 700         sattr->ia_mode &= ~current_umask();
 701
 702         data = nfs3_alloc_createdata();
 703         if (data == NULL)
 704                 goto out;
 705
 706         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 707         data->arg.mknod.fh = NFS_FH(dir);
 708         data->arg.mknod.name = dentry->d_name.name;
 709         data->arg.mknod.len = dentry->d_name.len;
 710         data->arg.mknod.sattr = sattr;
 711         data->arg.mknod.rdev = rdev;
 712
 713         switch (sattr->ia_mode & S_IFMT) {
 714         case S_IFBLK:
 715                 data->arg.mknod.type = NF3BLK;
 716                 break;
 717         case S_IFCHR:
 718                 data->arg.mknod.type = NF3CHR;
 719                 break;
 720         case S_IFIFO:
 721                 data->arg.mknod.type = NF3FIFO;
 722                 break;
 723         case S_IFSOCK:
 724                 data->arg.mknod.type = NF3SOCK;
 725                 break;
 726         default:
 727                 status = -EINVAL;
 728                 goto out;
 729         }
 730
 731         status = nfs3_do_create(dir, dentry, data);
 732         if (status != 0)
 733                 goto out;
 734         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 735 out:
 736         nfs3_free_createdata(data);
 737         dprintk("NFS reply mknod: %d\n", status);
 738         return status;
 739 }
 740
 741 static int
 742 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 743                  struct nfs_fsstat *stat)
 744 {
 745         struct rpc_message msg = {
 746                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 747                 .rpc_argp       = fhandle,
 748                 .rpc_resp       = stat,
 749         };
 750         int     status;
 751
 752         dprintk("NFS call  fsstat\n");
 753         nfs_fattr_init(stat->fattr);
 754         status = rpc_call_sync(server->client, &msg, 0);
 755         dprintk("NFS reply fsstat: %d\n", status);
 756         return status;
 757 }
 758
 759 static int
 760 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 761                  struct nfs_fsinfo *info)
 762 {
 763         struct rpc_message msg = {
 764                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 765                 .rpc_argp       = fhandle,
 766                 .rpc_resp       = info,
 767         };
 768         int     status;
 769
 770         dprintk("NFS call  fsinfo\n");
 771         nfs_fattr_init(info->fattr);
 772         status = rpc_call_sync(client, &msg, 0);
 773         dprintk("NFS reply fsinfo: %d\n", status);
 774         return status;
 775 }
 776
 777 /*
 778  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 779  * nfs_create_server
 780  */
 781 static int
 782 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 783                    struct nfs_fsinfo *info)
 784 {
 785         int     status;
 786
 787         status = do_proc_fsinfo(server->client, fhandle, info);
 788         if (status && server->nfs_client->cl_rpcclient != server->client)
 789                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 790         return status;
 791 }
 792
 793 static int
 794 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 795                    struct nfs_pathconf *info)
 796 {
 797         struct rpc_message msg = {
 798                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 799                 .rpc_argp       = fhandle,
 800                 .rpc_resp       = info,
 801         };
 802         int     status;
 803
 804         dprintk("NFS call  pathconf\n");
 805         nfs_fattr_init(info->fattr);
 806         status = rpc_call_sync(server->client, &msg, 0);
 807         dprintk("NFS reply pathconf: %d\n", status);
 808         return status;
 809 }
 810
 811 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 812 {
 813         struct inode *inode = data->header->inode;
 814
 815         if (nfs3_async_handle_jukebox(task, inode))
 816                 return -EAGAIN;
 817
 818         nfs_invalidate_atime(inode);
 819         nfs_refresh_inode(inode, &data->fattr);
 820         return 0;
 821 }
 822
 823 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 824 {
 825         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 826 }
 827
 828 static void nfs3_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
 829 {
 830         rpc_call_start(task);
 831 }
 832
 833 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 834 {
 835         struct inode *inode = data->header->inode;
 836
 837         if (nfs3_async_handle_jukebox(task, inode))
 838                 return -EAGAIN;
 839         if (task->tk_status >= 0)
 840                 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
 841         return 0;
 842 }
 843
 844 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 845 {
 846         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 847 }
 848
 849 static void nfs3_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
 850 {
 851         rpc_call_start(task);
 852 }
 853
 854 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 855 {
 856         rpc_call_start(task);
 857 }
 858
 859 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
 860 {
 861         if (nfs3_async_handle_jukebox(task, data->inode))
 862                 return -EAGAIN;
 863         nfs_refresh_inode(data->inode, data->res.fattr);
 864         return 0;
 865 }
 866
 867 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 868 {
 869         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 870 }
 871
 872 static int
 873 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 874 {
 875         struct inode *inode = filp->f_path.dentry->d_inode;
 876
 877         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 878 }
 879
 880 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
 881 {
 882         return 0;
 883 }
 884
 885 static int nfs3_return_delegation(struct inode *inode)
 886 {
 887         nfs_wb_all(inode);
 888         return 0;
 889 }
 890
 891 static const struct inode_operations nfs3_dir_inode_operations = {
 892         .create         = nfs_create,
 893         .lookup         = nfs_lookup,
 894         .link           = nfs_link,
 895         .unlink         = nfs_unlink,
 896         .symlink        = nfs_symlink,
 897         .mkdir          = nfs_mkdir,
 898         .rmdir          = nfs_rmdir,
 899         .mknod          = nfs_mknod,
 900         .rename         = nfs_rename,
 901         .permission     = nfs_permission,
 902         .getattr        = nfs_getattr,
 903         .setattr        = nfs_setattr,
 904         .listxattr      = nfs3_listxattr,
 905         .getxattr       = nfs3_getxattr,
 906         .setxattr       = nfs3_setxattr,
 907         .removexattr    = nfs3_removexattr,
 908 };
 909
 910 static const struct inode_operations nfs3_file_inode_operations = {
 911         .permission     = nfs_permission,
 912         .getattr        = nfs_getattr,
 913         .setattr        = nfs_setattr,
 914         .listxattr      = nfs3_listxattr,
 915         .getxattr       = nfs3_getxattr,
 916         .setxattr       = nfs3_setxattr,
 917         .removexattr    = nfs3_removexattr,
 918 };
 919
 920 const struct nfs_rpc_ops nfs_v3_clientops = {
 921         .version        = 3,                    /* protocol version */
 922         .dentry_ops     = &nfs_dentry_operations,
 923         .dir_inode_ops  = &nfs3_dir_inode_operations,
 924         .file_inode_ops = &nfs3_file_inode_operations,
 925         .file_ops       = &nfs_file_operations,
 926         .getroot        = nfs3_proc_get_root,
 927         .submount       = nfs_submount,
 928         .try_mount      = nfs_try_mount,
 929         .getattr        = nfs3_proc_getattr,
 930         .setattr        = nfs3_proc_setattr,
 931         .lookup         = nfs3_proc_lookup,
 932         .access         = nfs3_proc_access,
 933         .readlink       = nfs3_proc_readlink,
 934         .create         = nfs3_proc_create,
 935         .remove         = nfs3_proc_remove,
 936         .unlink_setup   = nfs3_proc_unlink_setup,
 937         .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
 938         .unlink_done    = nfs3_proc_unlink_done,
 939         .rename         = nfs3_proc_rename,
 940         .rename_setup   = nfs3_proc_rename_setup,
 941         .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
 942         .rename_done    = nfs3_proc_rename_done,
 943         .link           = nfs3_proc_link,
 944         .symlink        = nfs3_proc_symlink,
 945         .mkdir          = nfs3_proc_mkdir,
 946         .rmdir          = nfs3_proc_rmdir,
 947         .readdir        = nfs3_proc_readdir,
 948         .mknod          = nfs3_proc_mknod,
 949         .statfs         = nfs3_proc_statfs,
 950         .fsinfo         = nfs3_proc_fsinfo,
 951         .pathconf       = nfs3_proc_pathconf,
 952         .decode_dirent  = nfs3_decode_dirent,
 953         .read_setup     = nfs3_proc_read_setup,
 954         .read_pageio_init = nfs_pageio_init_read,
 955         .read_rpc_prepare = nfs3_proc_read_rpc_prepare,
 956         .read_done      = nfs3_read_done,
 957         .write_setup    = nfs3_proc_write_setup,
 958         .write_pageio_init = nfs_pageio_init_write,
 959         .write_rpc_prepare = nfs3_proc_write_rpc_prepare,
 960         .write_done     = nfs3_write_done,
 961         .commit_setup   = nfs3_proc_commit_setup,
 962         .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
 963         .commit_done    = nfs3_commit_done,
 964         .lock           = nfs3_proc_lock,
 965         .clear_acl_cache = nfs3_forget_cached_acls,
 966         .close_context  = nfs_close_context,
 967         .have_delegation = nfs3_have_delegation,
 968         .return_delegation = nfs3_return_delegation,
 969         .alloc_client   = nfs_alloc_client,
 970         .init_client    = nfs_init_client,
 971         .free_client    = nfs_free_client,
 972         .create_server  = nfs3_create_server,
 973         .clone_server   = nfs3_clone_server,
 974 };