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 posix_acl *default_acl, *acl;
 321         struct nfs3_createdata *data;
 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         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 344         if (status)
 345                 goto out;
 346
 347         for (;;) {
 348                 status = nfs3_do_create(dir, dentry, data);
 349
 350                 if (status != -ENOTSUPP)
 351                         break;
 352                 /* If the server doesn't support the exclusive creation
 353                  * semantics, try again with simple 'guarded' mode. */
 354                 switch (data->arg.create.createmode) {
 355                         case NFS3_CREATE_EXCLUSIVE:
 356                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 357                                 break;
 358
 359                         case NFS3_CREATE_GUARDED:
 360                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 361                                 break;
 362
 363                         case NFS3_CREATE_UNCHECKED:
 364                                 goto out;
 365                 }
 366                 nfs_fattr_init(data->res.dir_attr);
 367                 nfs_fattr_init(data->res.fattr);
 368         }
 369
 370         if (status != 0)
 371                 goto out_release_acls;
 372
 373         /* When we created the file with exclusive semantics, make
 374          * sure we set the attributes afterwards. */
 375         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 376                 dprintk("NFS call  setattr (post-create)\n");
 377
 378                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 379                         sattr->ia_valid |= ATTR_ATIME;
 380                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 381                         sattr->ia_valid |= ATTR_MTIME;
 382
 383                 /* Note: we could use a guarded setattr here, but I'm
 384                  * not sure this buys us anything (and I'd have
 385                  * to revamp the NFSv3 XDR code) */
 386                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 387                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 388                 dprintk("NFS reply setattr (post-create): %d\n", status);
 389                 if (status != 0)
 390                         goto out_release_acls;
 391         }
 392
 393         status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
 394
 395 out_release_acls:
 396         posix_acl_release(acl);
 397         posix_acl_release(default_acl);
 398 out:
 399         nfs3_free_createdata(data);
 400         dprintk("NFS reply create: %d\n", status);
 401         return status;
 402 }
 403
 404 static int
 405 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 406 {
 407         struct nfs_removeargs arg = {
 408                 .fh = NFS_FH(dir),
 409                 .name = *name,
 410         };
 411         struct nfs_removeres res;
 412         struct rpc_message msg = {
 413                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 414                 .rpc_argp = &arg,
 415                 .rpc_resp = &res,
 416         };
 417         int status = -ENOMEM;
 418
 419         dprintk("NFS call  remove %s\n", name->name);
 420         res.dir_attr = nfs_alloc_fattr();
 421         if (res.dir_attr == NULL)
 422                 goto out;
 423
 424         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 425         nfs_post_op_update_inode(dir, res.dir_attr);
 426         nfs_free_fattr(res.dir_attr);
 427 out:
 428         dprintk("NFS reply remove: %d\n", status);
 429         return status;
 430 }
 431
 432 static void
 433 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 434 {
 435         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 436 }
 437
 438 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 439 {
 440         rpc_call_start(task);
 441 }
 442
 443 static int
 444 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 445 {
 446         struct nfs_removeres *res;
 447         if (nfs3_async_handle_jukebox(task, dir))
 448                 return 0;
 449         res = task->tk_msg.rpc_resp;
 450         nfs_post_op_update_inode(dir, res->dir_attr);
 451         return 1;
 452 }
 453
 454 static void
 455 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 456 {
 457         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 458 }
 459
 460 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 461 {
 462         rpc_call_start(task);
 463 }
 464
 465 static int
 466 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 467                       struct inode *new_dir)
 468 {
 469         struct nfs_renameres *res;
 470
 471         if (nfs3_async_handle_jukebox(task, old_dir))
 472                 return 0;
 473         res = task->tk_msg.rpc_resp;
 474
 475         nfs_post_op_update_inode(old_dir, res->old_fattr);
 476         nfs_post_op_update_inode(new_dir, res->new_fattr);
 477         return 1;
 478 }
 479
 480 static int
 481 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 482                  struct inode *new_dir, struct qstr *new_name)
 483 {
 484         struct nfs_renameargs   arg = {
 485                 .old_dir        = NFS_FH(old_dir),
 486                 .old_name       = old_name,
 487                 .new_dir        = NFS_FH(new_dir),
 488                 .new_name       = new_name,
 489         };
 490         struct nfs_renameres res;
 491         struct rpc_message msg = {
 492                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 493                 .rpc_argp       = &arg,
 494                 .rpc_resp       = &res,
 495         };
 496         int status = -ENOMEM;
 497
 498         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 499
 500         res.old_fattr = nfs_alloc_fattr();
 501         res.new_fattr = nfs_alloc_fattr();
 502         if (res.old_fattr == NULL || res.new_fattr == NULL)
 503                 goto out;
 504
 505         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 506         nfs_post_op_update_inode(old_dir, res.old_fattr);
 507         nfs_post_op_update_inode(new_dir, res.new_fattr);
 508 out:
 509         nfs_free_fattr(res.old_fattr);
 510         nfs_free_fattr(res.new_fattr);
 511         dprintk("NFS reply rename: %d\n", status);
 512         return status;
 513 }
 514
 515 static int
 516 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 517 {
 518         struct nfs3_linkargs    arg = {
 519                 .fromfh         = NFS_FH(inode),
 520                 .tofh           = NFS_FH(dir),
 521                 .toname         = name->name,
 522                 .tolen          = name->len
 523         };
 524         struct nfs3_linkres     res;
 525         struct rpc_message msg = {
 526                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 527                 .rpc_argp       = &arg,
 528                 .rpc_resp       = &res,
 529         };
 530         int status = -ENOMEM;
 531
 532         dprintk("NFS call  link %s\n", name->name);
 533         res.fattr = nfs_alloc_fattr();
 534         res.dir_attr = nfs_alloc_fattr();
 535         if (res.fattr == NULL || res.dir_attr == NULL)
 536                 goto out;
 537
 538         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 539         nfs_post_op_update_inode(dir, res.dir_attr);
 540         nfs_post_op_update_inode(inode, res.fattr);
 541 out:
 542         nfs_free_fattr(res.dir_attr);
 543         nfs_free_fattr(res.fattr);
 544         dprintk("NFS reply link: %d\n", status);
 545         return status;
 546 }
 547
 548 static int
 549 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 550                   unsigned int len, struct iattr *sattr)
 551 {
 552         struct nfs3_createdata *data;
 553         int status = -ENOMEM;
 554
 555         if (len > NFS3_MAXPATHLEN)
 556                 return -ENAMETOOLONG;
 557
 558         dprintk("NFS call  symlink %pd\n", dentry);
 559
 560         data = nfs3_alloc_createdata();
 561         if (data == NULL)
 562                 goto out;
 563         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 564         data->arg.symlink.fromfh = NFS_FH(dir);
 565         data->arg.symlink.fromname = dentry->d_name.name;
 566         data->arg.symlink.fromlen = dentry->d_name.len;
 567         data->arg.symlink.pages = &page;
 568         data->arg.symlink.pathlen = len;
 569         data->arg.symlink.sattr = sattr;
 570
 571         status = nfs3_do_create(dir, dentry, data);
 572
 573         nfs3_free_createdata(data);
 574 out:
 575         dprintk("NFS reply symlink: %d\n", status);
 576         return status;
 577 }
 578
 579 static int
 580 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 581 {
 582         struct posix_acl *default_acl, *acl;
 583         struct nfs3_createdata *data;
 584         int status = -ENOMEM;
 585
 586         dprintk("NFS call  mkdir %pd\n", dentry);
 587
 588         data = nfs3_alloc_createdata();
 589         if (data == NULL)
 590                 goto out;
 591
 592         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 593         if (status)
 594                 goto out;
 595
 596         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 597         data->arg.mkdir.fh = NFS_FH(dir);
 598         data->arg.mkdir.name = dentry->d_name.name;
 599         data->arg.mkdir.len = dentry->d_name.len;
 600         data->arg.mkdir.sattr = sattr;
 601
 602         status = nfs3_do_create(dir, dentry, data);
 603         if (status != 0)
 604                 goto out_release_acls;
 605
 606         status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
 607
 608 out_release_acls:
 609         posix_acl_release(acl);
 610         posix_acl_release(default_acl);
 611 out:
 612         nfs3_free_createdata(data);
 613         dprintk("NFS reply mkdir: %d\n", status);
 614         return status;
 615 }
 616
 617 static int
 618 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 619 {
 620         struct nfs_fattr        *dir_attr;
 621         struct nfs3_diropargs   arg = {
 622                 .fh             = NFS_FH(dir),
 623                 .name           = name->name,
 624                 .len            = name->len
 625         };
 626         struct rpc_message msg = {
 627                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 628                 .rpc_argp       = &arg,
 629         };
 630         int status = -ENOMEM;
 631
 632         dprintk("NFS call  rmdir %s\n", name->name);
 633         dir_attr = nfs_alloc_fattr();
 634         if (dir_attr == NULL)
 635                 goto out;
 636
 637         msg.rpc_resp = dir_attr;
 638         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 639         nfs_post_op_update_inode(dir, dir_attr);
 640         nfs_free_fattr(dir_attr);
 641 out:
 642         dprintk("NFS reply rmdir: %d\n", status);
 643         return status;
 644 }
 645
 646 /*
 647  * The READDIR implementation is somewhat hackish - we pass the user buffer
 648  * to the encode function, which installs it in the receive iovec.
 649  * The decode function itself doesn't perform any decoding, it just makes
 650  * sure the reply is syntactically correct.
 651  *
 652  * Also note that this implementation handles both plain readdir and
 653  * readdirplus.
 654  */
 655 static int
 656 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 657                   u64 cookie, struct page **pages, unsigned int count, int plus)
 658 {
 659         struct inode            *dir = dentry->d_inode;
 660         __be32                  *verf = NFS_I(dir)->cookieverf;
 661         struct nfs3_readdirargs arg = {
 662                 .fh             = NFS_FH(dir),
 663                 .cookie         = cookie,
 664                 .verf           = {verf[0], verf[1]},
 665                 .plus           = plus,
 666                 .count          = count,
 667                 .pages          = pages
 668         };
 669         struct nfs3_readdirres  res = {
 670                 .verf           = verf,
 671                 .plus           = plus
 672         };
 673         struct rpc_message      msg = {
 674                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 675                 .rpc_argp       = &arg,
 676                 .rpc_resp       = &res,
 677                 .rpc_cred       = cred
 678         };
 679         int status = -ENOMEM;
 680
 681         if (plus)
 682                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 683
 684         dprintk("NFS call  readdir%s %d\n",
 685                         plus? "plus" : "", (unsigned int) cookie);
 686
 687         res.dir_attr = nfs_alloc_fattr();
 688         if (res.dir_attr == NULL)
 689                 goto out;
 690
 691         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 692
 693         nfs_invalidate_atime(dir);
 694         nfs_refresh_inode(dir, res.dir_attr);
 695
 696         nfs_free_fattr(res.dir_attr);
 697 out:
 698         dprintk("NFS reply readdir%s: %d\n",
 699                         plus? "plus" : "", status);
 700         return status;
 701 }
 702
 703 static int
 704 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 705                 dev_t rdev)
 706 {
 707         struct posix_acl *default_acl, *acl;
 708         struct nfs3_createdata *data;
 709         int status = -ENOMEM;
 710
 711         dprintk("NFS call  mknod %pd %u:%u\n", dentry,
 712                         MAJOR(rdev), MINOR(rdev));
 713
 714         data = nfs3_alloc_createdata();
 715         if (data == NULL)
 716                 goto out;
 717
 718         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 719         if (status)
 720                 goto out;
 721
 722         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 723         data->arg.mknod.fh = NFS_FH(dir);
 724         data->arg.mknod.name = dentry->d_name.name;
 725         data->arg.mknod.len = dentry->d_name.len;
 726         data->arg.mknod.sattr = sattr;
 727         data->arg.mknod.rdev = rdev;
 728
 729         switch (sattr->ia_mode & S_IFMT) {
 730         case S_IFBLK:
 731                 data->arg.mknod.type = NF3BLK;
 732                 break;
 733         case S_IFCHR:
 734                 data->arg.mknod.type = NF3CHR;
 735                 break;
 736         case S_IFIFO:
 737                 data->arg.mknod.type = NF3FIFO;
 738                 break;
 739         case S_IFSOCK:
 740                 data->arg.mknod.type = NF3SOCK;
 741                 break;
 742         default:
 743                 status = -EINVAL;
 744                 goto out;
 745         }
 746
 747         status = nfs3_do_create(dir, dentry, data);
 748         if (status != 0)
 749                 goto out_release_acls;
 750
 751         status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
 752
 753 out_release_acls:
 754         posix_acl_release(acl);
 755         posix_acl_release(default_acl);
 756 out:
 757         nfs3_free_createdata(data);
 758         dprintk("NFS reply mknod: %d\n", status);
 759         return status;
 760 }
 761
 762 static int
 763 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 764                  struct nfs_fsstat *stat)
 765 {
 766         struct rpc_message msg = {
 767                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 768                 .rpc_argp       = fhandle,
 769                 .rpc_resp       = stat,
 770         };
 771         int     status;
 772
 773         dprintk("NFS call  fsstat\n");
 774         nfs_fattr_init(stat->fattr);
 775         status = rpc_call_sync(server->client, &msg, 0);
 776         dprintk("NFS reply fsstat: %d\n", status);
 777         return status;
 778 }
 779
 780 static int
 781 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 782                  struct nfs_fsinfo *info)
 783 {
 784         struct rpc_message msg = {
 785                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 786                 .rpc_argp       = fhandle,
 787                 .rpc_resp       = info,
 788         };
 789         int     status;
 790
 791         dprintk("NFS call  fsinfo\n");
 792         nfs_fattr_init(info->fattr);
 793         status = rpc_call_sync(client, &msg, 0);
 794         dprintk("NFS reply fsinfo: %d\n", status);
 795         return status;
 796 }
 797
 798 /*
 799  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 800  * nfs_create_server
 801  */
 802 static int
 803 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 804                    struct nfs_fsinfo *info)
 805 {
 806         int     status;
 807
 808         status = do_proc_fsinfo(server->client, fhandle, info);
 809         if (status && server->nfs_client->cl_rpcclient != server->client)
 810                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 811         return status;
 812 }
 813
 814 static int
 815 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 816                    struct nfs_pathconf *info)
 817 {
 818         struct rpc_message msg = {
 819                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 820                 .rpc_argp       = fhandle,
 821                 .rpc_resp       = info,
 822         };
 823         int     status;
 824
 825         dprintk("NFS call  pathconf\n");
 826         nfs_fattr_init(info->fattr);
 827         status = rpc_call_sync(server->client, &msg, 0);
 828         dprintk("NFS reply pathconf: %d\n", status);
 829         return status;
 830 }
 831
 832 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 833 {
 834         struct inode *inode = data->header->inode;
 835
 836         if (nfs3_async_handle_jukebox(task, inode))
 837                 return -EAGAIN;
 838
 839         nfs_invalidate_atime(inode);
 840         nfs_refresh_inode(inode, &data->fattr);
 841         return 0;
 842 }
 843
 844 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 845 {
 846         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 847 }
 848
 849 static int nfs3_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
 850 {
 851         rpc_call_start(task);
 852         return 0;
 853 }
 854
 855 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 856 {
 857         struct inode *inode = data->header->inode;
 858
 859         if (nfs3_async_handle_jukebox(task, inode))
 860                 return -EAGAIN;
 861         if (task->tk_status >= 0)
 862                 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
 863         return 0;
 864 }
 865
 866 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 867 {
 868         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 869 }
 870
 871 static int nfs3_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
 872 {
 873         rpc_call_start(task);
 874         return 0;
 875 }
 876
 877 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 878 {
 879         rpc_call_start(task);
 880 }
 881
 882 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
 883 {
 884         if (nfs3_async_handle_jukebox(task, data->inode))
 885                 return -EAGAIN;
 886         nfs_refresh_inode(data->inode, data->res.fattr);
 887         return 0;
 888 }
 889
 890 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 891 {
 892         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 893 }
 894
 895 static int
 896 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 897 {
 898         struct inode *inode = file_inode(filp);
 899
 900         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 901 }
 902
 903 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
 904 {
 905         return 0;
 906 }
 907
 908 static int nfs3_return_delegation(struct inode *inode)
 909 {
 910         nfs_wb_all(inode);
 911         return 0;
 912 }
 913
 914 static const struct inode_operations nfs3_dir_inode_operations = {
 915         .create         = nfs_create,
 916         .lookup         = nfs_lookup,
 917         .link           = nfs_link,
 918         .unlink         = nfs_unlink,
 919         .symlink        = nfs_symlink,
 920         .mkdir          = nfs_mkdir,
 921         .rmdir          = nfs_rmdir,
 922         .mknod          = nfs_mknod,
 923         .rename         = nfs_rename,
 924         .permission     = nfs_permission,
 925         .getattr        = nfs_getattr,
 926         .setattr        = nfs_setattr,
 927         .listxattr      = generic_listxattr,
 928         .getxattr       = generic_getxattr,
 929         .setxattr       = generic_setxattr,
 930         .removexattr    = generic_removexattr,
 931 #ifdef CONFIG_NFS_V3_ACL
 932         .get_acl        = nfs3_get_acl,
 933         .set_acl        = nfs3_set_acl,
 934 #endif
 935 };
 936
 937 static const struct inode_operations nfs3_file_inode_operations = {
 938         .permission     = nfs_permission,
 939         .getattr        = nfs_getattr,
 940         .setattr        = nfs_setattr,
 941         .listxattr      = generic_listxattr,
 942         .getxattr       = generic_getxattr,
 943         .setxattr       = generic_setxattr,
 944         .removexattr    = generic_removexattr,
 945 #ifdef CONFIG_NFS_V3_ACL
 946         .get_acl        = nfs3_get_acl,
 947         .set_acl        = nfs3_set_acl,
 948 #endif
 949 };
 950
 951 const struct nfs_rpc_ops nfs_v3_clientops = {
 952         .version        = 3,                    /* protocol version */
 953         .dentry_ops     = &nfs_dentry_operations,
 954         .dir_inode_ops  = &nfs3_dir_inode_operations,
 955         .file_inode_ops = &nfs3_file_inode_operations,
 956         .file_ops       = &nfs_file_operations,
 957         .getroot        = nfs3_proc_get_root,
 958         .submount       = nfs_submount,
 959         .try_mount      = nfs_try_mount,
 960         .getattr        = nfs3_proc_getattr,
 961         .setattr        = nfs3_proc_setattr,
 962         .lookup         = nfs3_proc_lookup,
 963         .access         = nfs3_proc_access,
 964         .readlink       = nfs3_proc_readlink,
 965         .create         = nfs3_proc_create,
 966         .remove         = nfs3_proc_remove,
 967         .unlink_setup   = nfs3_proc_unlink_setup,
 968         .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
 969         .unlink_done    = nfs3_proc_unlink_done,
 970         .rename         = nfs3_proc_rename,
 971         .rename_setup   = nfs3_proc_rename_setup,
 972         .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
 973         .rename_done    = nfs3_proc_rename_done,
 974         .link           = nfs3_proc_link,
 975         .symlink        = nfs3_proc_symlink,
 976         .mkdir          = nfs3_proc_mkdir,
 977         .rmdir          = nfs3_proc_rmdir,
 978         .readdir        = nfs3_proc_readdir,
 979         .mknod          = nfs3_proc_mknod,
 980         .statfs         = nfs3_proc_statfs,
 981         .fsinfo         = nfs3_proc_fsinfo,
 982         .pathconf       = nfs3_proc_pathconf,
 983         .decode_dirent  = nfs3_decode_dirent,
 984         .read_setup     = nfs3_proc_read_setup,
 985         .read_pageio_init = nfs_pageio_init_read,
 986         .read_rpc_prepare = nfs3_proc_read_rpc_prepare,
 987         .read_done      = nfs3_read_done,
 988         .write_setup    = nfs3_proc_write_setup,
 989         .write_pageio_init = nfs_pageio_init_write,
 990         .write_rpc_prepare = nfs3_proc_write_rpc_prepare,
 991         .write_done     = nfs3_write_done,
 992         .commit_setup   = nfs3_proc_commit_setup,
 993         .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
 994         .commit_done    = nfs3_commit_done,
 995         .lock           = nfs3_proc_lock,
 996         .clear_acl_cache = forget_all_cached_acls,
 997         .close_context  = nfs_close_context,
 998         .have_delegation = nfs3_have_delegation,
 999         .return_delegation = nfs3_return_delegation,
1000         .alloc_client   = nfs_alloc_client,
1001         .init_client    = nfs_init_client,
1002         .free_client    = nfs_free_client,
1003         .create_server  = nfs3_create_server,
1004         .clone_server   = nfs3_clone_server,
1005 };