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 #include <linux/xattr.h>
  22
  23 #include "iostat.h"
  24 #include "internal.h"
  25
  26 #define NFSDBG_FACILITY         NFSDBG_PROC
  27
  28 /* A wrapper to handle the EJUKEBOX error messages */
  29 static int
  30 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  31 {
  32         int res;
  33         do {
  34                 res = rpc_call_sync(clnt, msg, flags);
  35                 if (res != -EJUKEBOX)
  36                         break;
  37                 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
  38                 res = -ERESTARTSYS;
  39         } while (!fatal_signal_pending(current));
  40         return res;
  41 }
  42
  43 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  44
  45 static int
  46 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  47 {
  48         if (task->tk_status != -EJUKEBOX)
  49                 return 0;
  50         if (task->tk_status == -EJUKEBOX)
  51                 nfs_inc_stats(inode, NFSIOS_DELAY);
  52         task->tk_status = 0;
  53         rpc_restart_call(task);
  54         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  55         return 1;
  56 }
  57
  58 static int
  59 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  60                  struct nfs_fsinfo *info)
  61 {
  62         struct rpc_message msg = {
  63                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  64                 .rpc_argp       = fhandle,
  65                 .rpc_resp       = info,
  66         };
  67         int     status;
  68
  69         dprintk("%s: call  fsinfo\n", __func__);
  70         nfs_fattr_init(info->fattr);
  71         status = rpc_call_sync(client, &msg, 0);
  72         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  73         if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
  74                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  75                 msg.rpc_resp = info->fattr;
  76                 status = rpc_call_sync(client, &msg, 0);
  77                 dprintk("%s: reply getattr: %d\n", __func__, status);
  78         }
  79         return status;
  80 }
  81
  82 /*
  83  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  84  */
  85 static int
  86 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  87                    struct nfs_fsinfo *info)
  88 {
  89         int     status;
  90
  91         status = do_proc_get_root(server->client, fhandle, info);
  92         if (status && server->nfs_client->cl_rpcclient != server->client)
  93                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  94         return status;
  95 }
  96
  97 /*
  98  * One function for each procedure in the NFS protocol.
  99  */
 100 static int
 101 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 102                 struct nfs_fattr *fattr, struct nfs4_label *label)
 103 {
 104         struct rpc_message msg = {
 105                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 106                 .rpc_argp       = fhandle,
 107                 .rpc_resp       = fattr,
 108         };
 109         int     status;
 110
 111         dprintk("NFS call  getattr\n");
 112         nfs_fattr_init(fattr);
 113         status = rpc_call_sync(server->client, &msg, 0);
 114         dprintk("NFS reply getattr: %d\n", status);
 115         return status;
 116 }
 117
 118 static int
 119 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 120                         struct iattr *sattr)
 121 {
 122         struct inode *inode = dentry->d_inode;
 123         struct nfs3_sattrargs   arg = {
 124                 .fh             = NFS_FH(inode),
 125                 .sattr          = sattr,
 126         };
 127         struct rpc_message msg = {
 128                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 129                 .rpc_argp       = &arg,
 130                 .rpc_resp       = fattr,
 131         };
 132         int     status;
 133
 134         dprintk("NFS call  setattr\n");
 135         if (sattr->ia_valid & ATTR_FILE)
 136                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 137         nfs_fattr_init(fattr);
 138         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 139         if (status == 0)
 140                 nfs_setattr_update_inode(inode, sattr);
 141         dprintk("NFS reply setattr: %d\n", status);
 142         return status;
 143 }
 144
 145 static int
 146 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 147                  struct nfs_fh *fhandle, struct nfs_fattr *fattr,
 148                  struct nfs4_label *label)
 149 {
 150         struct nfs3_diropargs   arg = {
 151                 .fh             = NFS_FH(dir),
 152                 .name           = name->name,
 153                 .len            = name->len
 154         };
 155         struct nfs3_diropres    res = {
 156                 .fh             = fhandle,
 157                 .fattr          = fattr
 158         };
 159         struct rpc_message msg = {
 160                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 161                 .rpc_argp       = &arg,
 162                 .rpc_resp       = &res,
 163         };
 164         int                     status;
 165
 166         dprintk("NFS call  lookup %s\n", name->name);
 167         res.dir_attr = nfs_alloc_fattr();
 168         if (res.dir_attr == NULL)
 169                 return -ENOMEM;
 170
 171         nfs_fattr_init(fattr);
 172         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 173         nfs_refresh_inode(dir, res.dir_attr);
 174         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 175                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 176                 msg.rpc_argp = fhandle;
 177                 msg.rpc_resp = fattr;
 178                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 179         }
 180         nfs_free_fattr(res.dir_attr);
 181         dprintk("NFS reply lookup: %d\n", status);
 182         return status;
 183 }
 184
 185 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 186 {
 187         struct nfs3_accessargs  arg = {
 188                 .fh             = NFS_FH(inode),
 189         };
 190         struct nfs3_accessres   res;
 191         struct rpc_message msg = {
 192                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 193                 .rpc_argp       = &arg,
 194                 .rpc_resp       = &res,
 195                 .rpc_cred       = entry->cred,
 196         };
 197         int mode = entry->mask;
 198         int status = -ENOMEM;
 199
 200         dprintk("NFS call  access\n");
 201
 202         if (mode & MAY_READ)
 203                 arg.access |= NFS3_ACCESS_READ;
 204         if (S_ISDIR(inode->i_mode)) {
 205                 if (mode & MAY_WRITE)
 206                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 207                 if (mode & MAY_EXEC)
 208                         arg.access |= NFS3_ACCESS_LOOKUP;
 209         } else {
 210                 if (mode & MAY_WRITE)
 211                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 212                 if (mode & MAY_EXEC)
 213                         arg.access |= NFS3_ACCESS_EXECUTE;
 214         }
 215
 216         res.fattr = nfs_alloc_fattr();
 217         if (res.fattr == NULL)
 218                 goto out;
 219
 220         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 221         nfs_refresh_inode(inode, res.fattr);
 222         if (status == 0) {
 223                 entry->mask = 0;
 224                 if (res.access & NFS3_ACCESS_READ)
 225                         entry->mask |= MAY_READ;
 226                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 227                         entry->mask |= MAY_WRITE;
 228                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 229                         entry->mask |= MAY_EXEC;
 230         }
 231         nfs_free_fattr(res.fattr);
 232 out:
 233         dprintk("NFS reply access: %d\n", status);
 234         return status;
 235 }
 236
 237 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 238                 unsigned int pgbase, unsigned int pglen)
 239 {
 240         struct nfs_fattr        *fattr;
 241         struct nfs3_readlinkargs args = {
 242                 .fh             = NFS_FH(inode),
 243                 .pgbase         = pgbase,
 244                 .pglen          = pglen,
 245                 .pages          = &page
 246         };
 247         struct rpc_message msg = {
 248                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 249                 .rpc_argp       = &args,
 250         };
 251         int status = -ENOMEM;
 252
 253         dprintk("NFS call  readlink\n");
 254         fattr = nfs_alloc_fattr();
 255         if (fattr == NULL)
 256                 goto out;
 257         msg.rpc_resp = fattr;
 258
 259         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 260         nfs_refresh_inode(inode, fattr);
 261         nfs_free_fattr(fattr);
 262 out:
 263         dprintk("NFS reply readlink: %d\n", status);
 264         return status;
 265 }
 266
 267 struct nfs3_createdata {
 268         struct rpc_message msg;
 269         union {
 270                 struct nfs3_createargs create;
 271                 struct nfs3_mkdirargs mkdir;
 272                 struct nfs3_symlinkargs symlink;
 273                 struct nfs3_mknodargs mknod;
 274         } arg;
 275         struct nfs3_diropres res;
 276         struct nfs_fh fh;
 277         struct nfs_fattr fattr;
 278         struct nfs_fattr dir_attr;
 279 };
 280
 281 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 282 {
 283         struct nfs3_createdata *data;
 284
 285         data = kzalloc(sizeof(*data), GFP_KERNEL);
 286         if (data != NULL) {
 287                 data->msg.rpc_argp = &data->arg;
 288                 data->msg.rpc_resp = &data->res;
 289                 data->res.fh = &data->fh;
 290                 data->res.fattr = &data->fattr;
 291                 data->res.dir_attr = &data->dir_attr;
 292                 nfs_fattr_init(data->res.fattr);
 293                 nfs_fattr_init(data->res.dir_attr);
 294         }
 295         return data;
 296 }
 297
 298 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 299 {
 300         int status;
 301
 302         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 303         nfs_post_op_update_inode(dir, data->res.dir_attr);
 304         if (status == 0)
 305                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 306         return status;
 307 }
 308
 309 static void nfs3_free_createdata(struct nfs3_createdata *data)
 310 {
 311         kfree(data);
 312 }
 313
 314 /*
 315  * Create a regular file.
 316  */
 317 static int
 318 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 319                  int flags)
 320 {
 321         struct posix_acl *default_acl, *acl;
 322         struct nfs3_createdata *data;
 323         int status = -ENOMEM;
 324
 325         dprintk("NFS call  create %pd\n", dentry);
 326
 327         data = nfs3_alloc_createdata();
 328         if (data == NULL)
 329                 goto out;
 330
 331         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 332         data->arg.create.fh = NFS_FH(dir);
 333         data->arg.create.name = dentry->d_name.name;
 334         data->arg.create.len = dentry->d_name.len;
 335         data->arg.create.sattr = sattr;
 336
 337         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 338         if (flags & O_EXCL) {
 339                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 340                 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
 341                 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
 342         }
 343
 344         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 345         if (status)
 346                 goto out;
 347
 348         for (;;) {
 349                 status = nfs3_do_create(dir, dentry, data);
 350
 351                 if (status != -ENOTSUPP)
 352                         break;
 353                 /* If the server doesn't support the exclusive creation
 354                  * semantics, try again with simple 'guarded' mode. */
 355                 switch (data->arg.create.createmode) {
 356                         case NFS3_CREATE_EXCLUSIVE:
 357                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 358                                 break;
 359
 360                         case NFS3_CREATE_GUARDED:
 361                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 362                                 break;
 363
 364                         case NFS3_CREATE_UNCHECKED:
 365                                 goto out;
 366                 }
 367                 nfs_fattr_init(data->res.dir_attr);
 368                 nfs_fattr_init(data->res.fattr);
 369         }
 370
 371         if (status != 0)
 372                 goto out_release_acls;
 373
 374         /* When we created the file with exclusive semantics, make
 375          * sure we set the attributes afterwards. */
 376         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 377                 dprintk("NFS call  setattr (post-create)\n");
 378
 379                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 380                         sattr->ia_valid |= ATTR_ATIME;
 381                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 382                         sattr->ia_valid |= ATTR_MTIME;
 383
 384                 /* Note: we could use a guarded setattr here, but I'm
 385                  * not sure this buys us anything (and I'd have
 386                  * to revamp the NFSv3 XDR code) */
 387                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 388                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 389                 dprintk("NFS reply setattr (post-create): %d\n", status);
 390                 if (status != 0)
 391                         goto out_release_acls;
 392         }
 393
 394         status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
 395
 396 out_release_acls:
 397         posix_acl_release(acl);
 398         posix_acl_release(default_acl);
 399 out:
 400         nfs3_free_createdata(data);
 401         dprintk("NFS reply create: %d\n", status);
 402         return status;
 403 }
 404
 405 static int
 406 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 407 {
 408         struct nfs_removeargs arg = {
 409                 .fh = NFS_FH(dir),
 410                 .name = *name,
 411         };
 412         struct nfs_removeres res;
 413         struct rpc_message msg = {
 414                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 415                 .rpc_argp = &arg,
 416                 .rpc_resp = &res,
 417         };
 418         int status = -ENOMEM;
 419
 420         dprintk("NFS call  remove %s\n", name->name);
 421         res.dir_attr = nfs_alloc_fattr();
 422         if (res.dir_attr == NULL)
 423                 goto out;
 424
 425         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 426         nfs_post_op_update_inode(dir, res.dir_attr);
 427         nfs_free_fattr(res.dir_attr);
 428 out:
 429         dprintk("NFS reply remove: %d\n", status);
 430         return status;
 431 }
 432
 433 static void
 434 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 435 {
 436         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 437 }
 438
 439 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 440 {
 441         rpc_call_start(task);
 442 }
 443
 444 static int
 445 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 446 {
 447         struct nfs_removeres *res;
 448         if (nfs3_async_handle_jukebox(task, dir))
 449                 return 0;
 450         res = task->tk_msg.rpc_resp;
 451         nfs_post_op_update_inode(dir, res->dir_attr);
 452         return 1;
 453 }
 454
 455 static void
 456 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 457 {
 458         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 459 }
 460
 461 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 462 {
 463         rpc_call_start(task);
 464 }
 465
 466 static int
 467 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 468                       struct inode *new_dir)
 469 {
 470         struct nfs_renameres *res;
 471
 472         if (nfs3_async_handle_jukebox(task, old_dir))
 473                 return 0;
 474         res = task->tk_msg.rpc_resp;
 475
 476         nfs_post_op_update_inode(old_dir, res->old_fattr);
 477         nfs_post_op_update_inode(new_dir, res->new_fattr);
 478         return 1;
 479 }
 480
 481 static int
 482 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 483 {
 484         struct nfs3_linkargs    arg = {
 485                 .fromfh         = NFS_FH(inode),
 486                 .tofh           = NFS_FH(dir),
 487                 .toname         = name->name,
 488                 .tolen          = name->len
 489         };
 490         struct nfs3_linkres     res;
 491         struct rpc_message msg = {
 492                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 493                 .rpc_argp       = &arg,
 494                 .rpc_resp       = &res,
 495         };
 496         int status = -ENOMEM;
 497
 498         dprintk("NFS call  link %s\n", name->name);
 499         res.fattr = nfs_alloc_fattr();
 500         res.dir_attr = nfs_alloc_fattr();
 501         if (res.fattr == NULL || res.dir_attr == NULL)
 502                 goto out;
 503
 504         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 505         nfs_post_op_update_inode(dir, res.dir_attr);
 506         nfs_post_op_update_inode(inode, res.fattr);
 507 out:
 508         nfs_free_fattr(res.dir_attr);
 509         nfs_free_fattr(res.fattr);
 510         dprintk("NFS reply link: %d\n", status);
 511         return status;
 512 }
 513
 514 static int
 515 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 516                   unsigned int len, struct iattr *sattr)
 517 {
 518         struct nfs3_createdata *data;
 519         int status = -ENOMEM;
 520
 521         if (len > NFS3_MAXPATHLEN)
 522                 return -ENAMETOOLONG;
 523
 524         dprintk("NFS call  symlink %pd\n", dentry);
 525
 526         data = nfs3_alloc_createdata();
 527         if (data == NULL)
 528                 goto out;
 529         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 530         data->arg.symlink.fromfh = NFS_FH(dir);
 531         data->arg.symlink.fromname = dentry->d_name.name;
 532         data->arg.symlink.fromlen = dentry->d_name.len;
 533         data->arg.symlink.pages = &page;
 534         data->arg.symlink.pathlen = len;
 535         data->arg.symlink.sattr = sattr;
 536
 537         status = nfs3_do_create(dir, dentry, data);
 538
 539         nfs3_free_createdata(data);
 540 out:
 541         dprintk("NFS reply symlink: %d\n", status);
 542         return status;
 543 }
 544
 545 static int
 546 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 547 {
 548         struct posix_acl *default_acl, *acl;
 549         struct nfs3_createdata *data;
 550         int status = -ENOMEM;
 551
 552         dprintk("NFS call  mkdir %pd\n", dentry);
 553
 554         data = nfs3_alloc_createdata();
 555         if (data == NULL)
 556                 goto out;
 557
 558         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 559         if (status)
 560                 goto out;
 561
 562         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 563         data->arg.mkdir.fh = NFS_FH(dir);
 564         data->arg.mkdir.name = dentry->d_name.name;
 565         data->arg.mkdir.len = dentry->d_name.len;
 566         data->arg.mkdir.sattr = sattr;
 567
 568         status = nfs3_do_create(dir, dentry, data);
 569         if (status != 0)
 570                 goto out_release_acls;
 571
 572         status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
 573
 574 out_release_acls:
 575         posix_acl_release(acl);
 576         posix_acl_release(default_acl);
 577 out:
 578         nfs3_free_createdata(data);
 579         dprintk("NFS reply mkdir: %d\n", status);
 580         return status;
 581 }
 582
 583 static int
 584 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 585 {
 586         struct nfs_fattr        *dir_attr;
 587         struct nfs3_diropargs   arg = {
 588                 .fh             = NFS_FH(dir),
 589                 .name           = name->name,
 590                 .len            = name->len
 591         };
 592         struct rpc_message msg = {
 593                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 594                 .rpc_argp       = &arg,
 595         };
 596         int status = -ENOMEM;
 597
 598         dprintk("NFS call  rmdir %s\n", name->name);
 599         dir_attr = nfs_alloc_fattr();
 600         if (dir_attr == NULL)
 601                 goto out;
 602
 603         msg.rpc_resp = dir_attr;
 604         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 605         nfs_post_op_update_inode(dir, dir_attr);
 606         nfs_free_fattr(dir_attr);
 607 out:
 608         dprintk("NFS reply rmdir: %d\n", status);
 609         return status;
 610 }
 611
 612 /*
 613  * The READDIR implementation is somewhat hackish - we pass the user buffer
 614  * to the encode function, which installs it in the receive iovec.
 615  * The decode function itself doesn't perform any decoding, it just makes
 616  * sure the reply is syntactically correct.
 617  *
 618  * Also note that this implementation handles both plain readdir and
 619  * readdirplus.
 620  */
 621 static int
 622 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 623                   u64 cookie, struct page **pages, unsigned int count, int plus)
 624 {
 625         struct inode            *dir = dentry->d_inode;
 626         __be32                  *verf = NFS_I(dir)->cookieverf;
 627         struct nfs3_readdirargs arg = {
 628                 .fh             = NFS_FH(dir),
 629                 .cookie         = cookie,
 630                 .verf           = {verf[0], verf[1]},
 631                 .plus           = plus,
 632                 .count          = count,
 633                 .pages          = pages
 634         };
 635         struct nfs3_readdirres  res = {
 636                 .verf           = verf,
 637                 .plus           = plus
 638         };
 639         struct rpc_message      msg = {
 640                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 641                 .rpc_argp       = &arg,
 642                 .rpc_resp       = &res,
 643                 .rpc_cred       = cred
 644         };
 645         int status = -ENOMEM;
 646
 647         if (plus)
 648                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 649
 650         dprintk("NFS call  readdir%s %d\n",
 651                         plus? "plus" : "", (unsigned int) cookie);
 652
 653         res.dir_attr = nfs_alloc_fattr();
 654         if (res.dir_attr == NULL)
 655                 goto out;
 656
 657         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 658
 659         nfs_invalidate_atime(dir);
 660         nfs_refresh_inode(dir, res.dir_attr);
 661
 662         nfs_free_fattr(res.dir_attr);
 663 out:
 664         dprintk("NFS reply readdir%s: %d\n",
 665                         plus? "plus" : "", status);
 666         return status;
 667 }
 668
 669 static int
 670 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 671                 dev_t rdev)
 672 {
 673         struct posix_acl *default_acl, *acl;
 674         struct nfs3_createdata *data;
 675         int status = -ENOMEM;
 676
 677         dprintk("NFS call  mknod %pd %u:%u\n", dentry,
 678                         MAJOR(rdev), MINOR(rdev));
 679
 680         data = nfs3_alloc_createdata();
 681         if (data == NULL)
 682                 goto out;
 683
 684         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 685         if (status)
 686                 goto out;
 687
 688         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 689         data->arg.mknod.fh = NFS_FH(dir);
 690         data->arg.mknod.name = dentry->d_name.name;
 691         data->arg.mknod.len = dentry->d_name.len;
 692         data->arg.mknod.sattr = sattr;
 693         data->arg.mknod.rdev = rdev;
 694
 695         switch (sattr->ia_mode & S_IFMT) {
 696         case S_IFBLK:
 697                 data->arg.mknod.type = NF3BLK;
 698                 break;
 699         case S_IFCHR:
 700                 data->arg.mknod.type = NF3CHR;
 701                 break;
 702         case S_IFIFO:
 703                 data->arg.mknod.type = NF3FIFO;
 704                 break;
 705         case S_IFSOCK:
 706                 data->arg.mknod.type = NF3SOCK;
 707                 break;
 708         default:
 709                 status = -EINVAL;
 710                 goto out;
 711         }
 712
 713         status = nfs3_do_create(dir, dentry, data);
 714         if (status != 0)
 715                 goto out_release_acls;
 716
 717         status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
 718
 719 out_release_acls:
 720         posix_acl_release(acl);
 721         posix_acl_release(default_acl);
 722 out:
 723         nfs3_free_createdata(data);
 724         dprintk("NFS reply mknod: %d\n", status);
 725         return status;
 726 }
 727
 728 static int
 729 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 730                  struct nfs_fsstat *stat)
 731 {
 732         struct rpc_message msg = {
 733                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 734                 .rpc_argp       = fhandle,
 735                 .rpc_resp       = stat,
 736         };
 737         int     status;
 738
 739         dprintk("NFS call  fsstat\n");
 740         nfs_fattr_init(stat->fattr);
 741         status = rpc_call_sync(server->client, &msg, 0);
 742         dprintk("NFS reply fsstat: %d\n", status);
 743         return status;
 744 }
 745
 746 static int
 747 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 748                  struct nfs_fsinfo *info)
 749 {
 750         struct rpc_message msg = {
 751                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 752                 .rpc_argp       = fhandle,
 753                 .rpc_resp       = info,
 754         };
 755         int     status;
 756
 757         dprintk("NFS call  fsinfo\n");
 758         nfs_fattr_init(info->fattr);
 759         status = rpc_call_sync(client, &msg, 0);
 760         dprintk("NFS reply fsinfo: %d\n", status);
 761         return status;
 762 }
 763
 764 /*
 765  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 766  * nfs_create_server
 767  */
 768 static int
 769 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 770                    struct nfs_fsinfo *info)
 771 {
 772         int     status;
 773
 774         status = do_proc_fsinfo(server->client, fhandle, info);
 775         if (status && server->nfs_client->cl_rpcclient != server->client)
 776                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 777         return status;
 778 }
 779
 780 static int
 781 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 782                    struct nfs_pathconf *info)
 783 {
 784         struct rpc_message msg = {
 785                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 786                 .rpc_argp       = fhandle,
 787                 .rpc_resp       = info,
 788         };
 789         int     status;
 790
 791         dprintk("NFS call  pathconf\n");
 792         nfs_fattr_init(info->fattr);
 793         status = rpc_call_sync(server->client, &msg, 0);
 794         dprintk("NFS reply pathconf: %d\n", status);
 795         return status;
 796 }
 797
 798 static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 799 {
 800         struct inode *inode = hdr->inode;
 801
 802         if (nfs3_async_handle_jukebox(task, inode))
 803                 return -EAGAIN;
 804
 805         nfs_invalidate_atime(inode);
 806         nfs_refresh_inode(inode, &hdr->fattr);
 807         return 0;
 808 }
 809
 810 static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
 811                                  struct rpc_message *msg)
 812 {
 813         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 814 }
 815
 816 static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
 817                                       struct nfs_pgio_header *hdr)
 818 {
 819         rpc_call_start(task);
 820         return 0;
 821 }
 822
 823 static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 824 {
 825         struct inode *inode = hdr->inode;
 826
 827         if (nfs3_async_handle_jukebox(task, inode))
 828                 return -EAGAIN;
 829         if (task->tk_status >= 0)
 830                 nfs_post_op_update_inode_force_wcc(inode, hdr->res.fattr);
 831         return 0;
 832 }
 833
 834 static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
 835                                   struct rpc_message *msg)
 836 {
 837         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 838 }
 839
 840 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 841 {
 842         rpc_call_start(task);
 843 }
 844
 845 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
 846 {
 847         if (nfs3_async_handle_jukebox(task, data->inode))
 848                 return -EAGAIN;
 849         nfs_refresh_inode(data->inode, data->res.fattr);
 850         return 0;
 851 }
 852
 853 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 854 {
 855         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 856 }
 857
 858 static int
 859 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 860 {
 861         struct inode *inode = file_inode(filp);
 862
 863         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 864 }
 865
 866 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
 867 {
 868         return 0;
 869 }
 870
 871 static int nfs3_return_delegation(struct inode *inode)
 872 {
 873         nfs_wb_all(inode);
 874         return 0;
 875 }
 876
 877 static const struct inode_operations nfs3_dir_inode_operations = {
 878         .create         = nfs_create,
 879         .lookup         = nfs_lookup,
 880         .link           = nfs_link,
 881         .unlink         = nfs_unlink,
 882         .symlink        = nfs_symlink,
 883         .mkdir          = nfs_mkdir,
 884         .rmdir          = nfs_rmdir,
 885         .mknod          = nfs_mknod,
 886         .rename         = nfs_rename,
 887         .permission     = nfs_permission,
 888         .getattr        = nfs_getattr,
 889         .setattr        = nfs_setattr,
 890 #ifdef CONFIG_NFS_V3_ACL
 891         .listxattr      = nfs3_listxattr,
 892         .getxattr       = generic_getxattr,
 893         .setxattr       = generic_setxattr,
 894         .removexattr    = generic_removexattr,
 895         .get_acl        = nfs3_get_acl,
 896         .set_acl        = nfs3_set_acl,
 897 #endif
 898 };
 899
 900 static const struct inode_operations nfs3_file_inode_operations = {
 901         .permission     = nfs_permission,
 902         .getattr        = nfs_getattr,
 903         .setattr        = nfs_setattr,
 904 #ifdef CONFIG_NFS_V3_ACL
 905         .listxattr      = nfs3_listxattr,
 906         .getxattr       = generic_getxattr,
 907         .setxattr       = generic_setxattr,
 908         .removexattr    = generic_removexattr,
 909         .get_acl        = nfs3_get_acl,
 910         .set_acl        = nfs3_set_acl,
 911 #endif
 912 };
 913
 914 const struct nfs_rpc_ops nfs_v3_clientops = {
 915         .version        = 3,                    /* protocol version */
 916         .dentry_ops     = &nfs_dentry_operations,
 917         .dir_inode_ops  = &nfs3_dir_inode_operations,
 918         .file_inode_ops = &nfs3_file_inode_operations,
 919         .file_ops       = &nfs_file_operations,
 920         .getroot        = nfs3_proc_get_root,
 921         .submount       = nfs_submount,
 922         .try_mount      = nfs_try_mount,
 923         .getattr        = nfs3_proc_getattr,
 924         .setattr        = nfs3_proc_setattr,
 925         .lookup         = nfs3_proc_lookup,
 926         .access         = nfs3_proc_access,
 927         .readlink       = nfs3_proc_readlink,
 928         .create         = nfs3_proc_create,
 929         .remove         = nfs3_proc_remove,
 930         .unlink_setup   = nfs3_proc_unlink_setup,
 931         .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
 932         .unlink_done    = nfs3_proc_unlink_done,
 933         .rename_setup   = nfs3_proc_rename_setup,
 934         .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
 935         .rename_done    = nfs3_proc_rename_done,
 936         .link           = nfs3_proc_link,
 937         .symlink        = nfs3_proc_symlink,
 938         .mkdir          = nfs3_proc_mkdir,
 939         .rmdir          = nfs3_proc_rmdir,
 940         .readdir        = nfs3_proc_readdir,
 941         .mknod          = nfs3_proc_mknod,
 942         .statfs         = nfs3_proc_statfs,
 943         .fsinfo         = nfs3_proc_fsinfo,
 944         .pathconf       = nfs3_proc_pathconf,
 945         .decode_dirent  = nfs3_decode_dirent,
 946         .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
 947         .read_setup     = nfs3_proc_read_setup,
 948         .read_done      = nfs3_read_done,
 949         .write_setup    = nfs3_proc_write_setup,
 950         .write_done     = nfs3_write_done,
 951         .commit_setup   = nfs3_proc_commit_setup,
 952         .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
 953         .commit_done    = nfs3_commit_done,
 954         .lock           = nfs3_proc_lock,
 955         .clear_acl_cache = forget_all_cached_acls,
 956         .close_context  = nfs_close_context,
 957         .have_delegation = nfs3_have_delegation,
 958         .return_delegation = nfs3_return_delegation,
 959         .alloc_client   = nfs_alloc_client,
 960         .init_client    = nfs_init_client,
 961         .free_client    = nfs_free_client,
 962         .create_server  = nfs3_create_server,
 963         .clone_server   = nfs3_clone_server,
 964 };