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
  21 #include "iostat.h"
  22 #include "internal.h"
  23
  24 #define NFSDBG_FACILITY         NFSDBG_PROC
  25
  26 /* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */
  27 static int
  28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  29 {
  30         int res;
  31         do {
  32                 res = rpc_call_sync(clnt, msg, flags);
  33                 if (res != -EJUKEBOX && res != -EKEYEXPIRED)
  34                         break;
  35                 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
  36                 res = -ERESTARTSYS;
  37         } while (!fatal_signal_pending(current));
  38         return res;
  39 }
  40
  41 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  42
  43 static int
  44 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  45 {
  46         if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED)
  47                 return 0;
  48         if (task->tk_status == -EJUKEBOX)
  49                 nfs_inc_stats(inode, NFSIOS_DELAY);
  50         task->tk_status = 0;
  51         rpc_restart_call(task);
  52         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  53         return 1;
  54 }
  55
  56 static int
  57 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  58                  struct nfs_fsinfo *info)
  59 {
  60         struct rpc_message msg = {
  61                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  62                 .rpc_argp       = fhandle,
  63                 .rpc_resp       = info,
  64         };
  65         int     status;
  66
  67         dprintk("%s: call  fsinfo\n", __func__);
  68         nfs_fattr_init(info->fattr);
  69         status = rpc_call_sync(client, &msg, 0);
  70         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  71         if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  72                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  73                 msg.rpc_resp = info->fattr;
  74                 status = rpc_call_sync(client, &msg, 0);
  75                 dprintk("%s: reply getattr: %d\n", __func__, status);
  76         }
  77         return status;
  78 }
  79
  80 /*
  81  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  82  */
  83 static int
  84 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  85                    struct nfs_fsinfo *info)
  86 {
  87         int     status;
  88
  89         status = do_proc_get_root(server->client, fhandle, info);
  90         if (status && server->nfs_client->cl_rpcclient != server->client)
  91                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  92         return status;
  93 }
  94
  95 /*
  96  * One function for each procedure in the NFS protocol.
  97  */
  98 static int
  99 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 100                 struct nfs_fattr *fattr)
 101 {
 102         struct rpc_message msg = {
 103                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 104                 .rpc_argp       = fhandle,
 105                 .rpc_resp       = fattr,
 106         };
 107         int     status;
 108
 109         dprintk("NFS call  getattr\n");
 110         nfs_fattr_init(fattr);
 111         status = rpc_call_sync(server->client, &msg, 0);
 112         dprintk("NFS reply getattr: %d\n", status);
 113         return status;
 114 }
 115
 116 static int
 117 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 118                         struct iattr *sattr)
 119 {
 120         struct inode *inode = dentry->d_inode;
 121         struct nfs3_sattrargs   arg = {
 122                 .fh             = NFS_FH(inode),
 123                 .sattr          = sattr,
 124         };
 125         struct rpc_message msg = {
 126                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 127                 .rpc_argp       = &arg,
 128                 .rpc_resp       = fattr,
 129         };
 130         int     status;
 131
 132         dprintk("NFS call  setattr\n");
 133         if (sattr->ia_valid & ATTR_FILE)
 134                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 135         nfs_fattr_init(fattr);
 136         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 137         if (status == 0)
 138                 nfs_setattr_update_inode(inode, sattr);
 139         dprintk("NFS reply setattr: %d\n", status);
 140         return status;
 141 }
 142
 143 static int
 144 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 145                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 146 {
 147         struct nfs3_diropargs   arg = {
 148                 .fh             = NFS_FH(dir),
 149                 .name           = name->name,
 150                 .len            = name->len
 151         };
 152         struct nfs3_diropres    res = {
 153                 .fh             = fhandle,
 154                 .fattr          = fattr
 155         };
 156         struct rpc_message msg = {
 157                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 158                 .rpc_argp       = &arg,
 159                 .rpc_resp       = &res,
 160         };
 161         int                     status;
 162
 163         dprintk("NFS call  lookup %s\n", name->name);
 164         res.dir_attr = nfs_alloc_fattr();
 165         if (res.dir_attr == NULL)
 166                 return -ENOMEM;
 167
 168         nfs_fattr_init(fattr);
 169         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 170         nfs_refresh_inode(dir, res.dir_attr);
 171         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 172                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 173                 msg.rpc_argp = fhandle;
 174                 msg.rpc_resp = fattr;
 175                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 176         }
 177         nfs_free_fattr(res.dir_attr);
 178         dprintk("NFS reply lookup: %d\n", status);
 179         return status;
 180 }
 181
 182 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 183 {
 184         struct nfs3_accessargs  arg = {
 185                 .fh             = NFS_FH(inode),
 186         };
 187         struct nfs3_accessres   res;
 188         struct rpc_message msg = {
 189                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 190                 .rpc_argp       = &arg,
 191                 .rpc_resp       = &res,
 192                 .rpc_cred       = entry->cred,
 193         };
 194         int mode = entry->mask;
 195         int status = -ENOMEM;
 196
 197         dprintk("NFS call  access\n");
 198
 199         if (mode & MAY_READ)
 200                 arg.access |= NFS3_ACCESS_READ;
 201         if (S_ISDIR(inode->i_mode)) {
 202                 if (mode & MAY_WRITE)
 203                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 204                 if (mode & MAY_EXEC)
 205                         arg.access |= NFS3_ACCESS_LOOKUP;
 206         } else {
 207                 if (mode & MAY_WRITE)
 208                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 209                 if (mode & MAY_EXEC)
 210                         arg.access |= NFS3_ACCESS_EXECUTE;
 211         }
 212
 213         res.fattr = nfs_alloc_fattr();
 214         if (res.fattr == NULL)
 215                 goto out;
 216
 217         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 218         nfs_refresh_inode(inode, res.fattr);
 219         if (status == 0) {
 220                 entry->mask = 0;
 221                 if (res.access & NFS3_ACCESS_READ)
 222                         entry->mask |= MAY_READ;
 223                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 224                         entry->mask |= MAY_WRITE;
 225                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 226                         entry->mask |= MAY_EXEC;
 227         }
 228         nfs_free_fattr(res.fattr);
 229 out:
 230         dprintk("NFS reply access: %d\n", status);
 231         return status;
 232 }
 233
 234 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 235                 unsigned int pgbase, unsigned int pglen)
 236 {
 237         struct nfs_fattr        *fattr;
 238         struct nfs3_readlinkargs args = {
 239                 .fh             = NFS_FH(inode),
 240                 .pgbase         = pgbase,
 241                 .pglen          = pglen,
 242                 .pages          = &page
 243         };
 244         struct rpc_message msg = {
 245                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 246                 .rpc_argp       = &args,
 247         };
 248         int status = -ENOMEM;
 249
 250         dprintk("NFS call  readlink\n");
 251         fattr = nfs_alloc_fattr();
 252         if (fattr == NULL)
 253                 goto out;
 254         msg.rpc_resp = fattr;
 255
 256         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 257         nfs_refresh_inode(inode, fattr);
 258         nfs_free_fattr(fattr);
 259 out:
 260         dprintk("NFS reply readlink: %d\n", status);
 261         return status;
 262 }
 263
 264 struct nfs3_createdata {
 265         struct rpc_message msg;
 266         union {
 267                 struct nfs3_createargs create;
 268                 struct nfs3_mkdirargs mkdir;
 269                 struct nfs3_symlinkargs symlink;
 270                 struct nfs3_mknodargs mknod;
 271         } arg;
 272         struct nfs3_diropres res;
 273         struct nfs_fh fh;
 274         struct nfs_fattr fattr;
 275         struct nfs_fattr dir_attr;
 276 };
 277
 278 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 279 {
 280         struct nfs3_createdata *data;
 281
 282         data = kzalloc(sizeof(*data), GFP_KERNEL);
 283         if (data != NULL) {
 284                 data->msg.rpc_argp = &data->arg;
 285                 data->msg.rpc_resp = &data->res;
 286                 data->res.fh = &data->fh;
 287                 data->res.fattr = &data->fattr;
 288                 data->res.dir_attr = &data->dir_attr;
 289                 nfs_fattr_init(data->res.fattr);
 290                 nfs_fattr_init(data->res.dir_attr);
 291         }
 292         return data;
 293 }
 294
 295 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 296 {
 297         int status;
 298
 299         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 300         nfs_post_op_update_inode(dir, data->res.dir_attr);
 301         if (status == 0)
 302                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
 303         return status;
 304 }
 305
 306 static void nfs3_free_createdata(struct nfs3_createdata *data)
 307 {
 308         kfree(data);
 309 }
 310
 311 /*
 312  * Create a regular file.
 313  */
 314 static int
 315 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 316                  int flags, struct nfs_open_context *ctx)
 317 {
 318         struct nfs3_createdata *data;
 319         mode_t mode = sattr->ia_mode;
 320         int status = -ENOMEM;
 321
 322         dprintk("NFS call  create %s\n", dentry->d_name.name);
 323
 324         data = nfs3_alloc_createdata();
 325         if (data == NULL)
 326                 goto out;
 327
 328         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 329         data->arg.create.fh = NFS_FH(dir);
 330         data->arg.create.name = dentry->d_name.name;
 331         data->arg.create.len = dentry->d_name.len;
 332         data->arg.create.sattr = sattr;
 333
 334         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 335         if (flags & O_EXCL) {
 336                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 337                 data->arg.create.verifier[0] = jiffies;
 338                 data->arg.create.verifier[1] = current->pid;
 339         }
 340
 341         sattr->ia_mode &= ~current_umask();
 342
 343         for (;;) {
 344                 status = nfs3_do_create(dir, dentry, data);
 345
 346                 if (status != -ENOTSUPP)
 347                         break;
 348                 /* If the server doesn't support the exclusive creation
 349                  * semantics, try again with simple 'guarded' mode. */
 350                 switch (data->arg.create.createmode) {
 351                         case NFS3_CREATE_EXCLUSIVE:
 352                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 353                                 break;
 354
 355                         case NFS3_CREATE_GUARDED:
 356                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 357                                 break;
 358
 359                         case NFS3_CREATE_UNCHECKED:
 360                                 goto out;
 361                 }
 362                 nfs_fattr_init(data->res.dir_attr);
 363                 nfs_fattr_init(data->res.fattr);
 364         }
 365
 366         if (status != 0)
 367                 goto out;
 368
 369         /* When we created the file with exclusive semantics, make
 370          * sure we set the attributes afterwards. */
 371         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 372                 dprintk("NFS call  setattr (post-create)\n");
 373
 374                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 375                         sattr->ia_valid |= ATTR_ATIME;
 376                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 377                         sattr->ia_valid |= ATTR_MTIME;
 378
 379                 /* Note: we could use a guarded setattr here, but I'm
 380                  * not sure this buys us anything (and I'd have
 381                  * to revamp the NFSv3 XDR code) */
 382                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 383                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 384                 dprintk("NFS reply setattr (post-create): %d\n", status);
 385                 if (status != 0)
 386                         goto out;
 387         }
 388         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 389 out:
 390         nfs3_free_createdata(data);
 391         dprintk("NFS reply create: %d\n", status);
 392         return status;
 393 }
 394
 395 static int
 396 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 397 {
 398         struct nfs_removeargs arg = {
 399                 .fh = NFS_FH(dir),
 400                 .name.len = name->len,
 401                 .name.name = 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 int
 431 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 432 {
 433         struct nfs_removeres *res;
 434         if (nfs3_async_handle_jukebox(task, dir))
 435                 return 0;
 436         res = task->tk_msg.rpc_resp;
 437         nfs_post_op_update_inode(dir, res->dir_attr);
 438         return 1;
 439 }
 440
 441 static void
 442 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 443 {
 444         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 445 }
 446
 447 static int
 448 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 449                       struct inode *new_dir)
 450 {
 451         struct nfs_renameres *res;
 452
 453         if (nfs3_async_handle_jukebox(task, old_dir))
 454                 return 0;
 455         res = task->tk_msg.rpc_resp;
 456
 457         nfs_post_op_update_inode(old_dir, res->old_fattr);
 458         nfs_post_op_update_inode(new_dir, res->new_fattr);
 459         return 1;
 460 }
 461
 462 static int
 463 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 464                  struct inode *new_dir, struct qstr *new_name)
 465 {
 466         struct nfs_renameargs   arg = {
 467                 .old_dir        = NFS_FH(old_dir),
 468                 .old_name       = old_name,
 469                 .new_dir        = NFS_FH(new_dir),
 470                 .new_name       = new_name,
 471         };
 472         struct nfs_renameres res;
 473         struct rpc_message msg = {
 474                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 475                 .rpc_argp       = &arg,
 476                 .rpc_resp       = &res,
 477         };
 478         int status = -ENOMEM;
 479
 480         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 481
 482         res.old_fattr = nfs_alloc_fattr();
 483         res.new_fattr = nfs_alloc_fattr();
 484         if (res.old_fattr == NULL || res.new_fattr == NULL)
 485                 goto out;
 486
 487         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 488         nfs_post_op_update_inode(old_dir, res.old_fattr);
 489         nfs_post_op_update_inode(new_dir, res.new_fattr);
 490 out:
 491         nfs_free_fattr(res.old_fattr);
 492         nfs_free_fattr(res.new_fattr);
 493         dprintk("NFS reply rename: %d\n", status);
 494         return status;
 495 }
 496
 497 static int
 498 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 499 {
 500         struct nfs3_linkargs    arg = {
 501                 .fromfh         = NFS_FH(inode),
 502                 .tofh           = NFS_FH(dir),
 503                 .toname         = name->name,
 504                 .tolen          = name->len
 505         };
 506         struct nfs3_linkres     res;
 507         struct rpc_message msg = {
 508                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 509                 .rpc_argp       = &arg,
 510                 .rpc_resp       = &res,
 511         };
 512         int status = -ENOMEM;
 513
 514         dprintk("NFS call  link %s\n", name->name);
 515         res.fattr = nfs_alloc_fattr();
 516         res.dir_attr = nfs_alloc_fattr();
 517         if (res.fattr == NULL || res.dir_attr == NULL)
 518                 goto out;
 519
 520         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 521         nfs_post_op_update_inode(dir, res.dir_attr);
 522         nfs_post_op_update_inode(inode, res.fattr);
 523 out:
 524         nfs_free_fattr(res.dir_attr);
 525         nfs_free_fattr(res.fattr);
 526         dprintk("NFS reply link: %d\n", status);
 527         return status;
 528 }
 529
 530 static int
 531 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 532                   unsigned int len, struct iattr *sattr)
 533 {
 534         struct nfs3_createdata *data;
 535         int status = -ENOMEM;
 536
 537         if (len > NFS3_MAXPATHLEN)
 538                 return -ENAMETOOLONG;
 539
 540         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 541
 542         data = nfs3_alloc_createdata();
 543         if (data == NULL)
 544                 goto out;
 545         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 546         data->arg.symlink.fromfh = NFS_FH(dir);
 547         data->arg.symlink.fromname = dentry->d_name.name;
 548         data->arg.symlink.fromlen = dentry->d_name.len;
 549         data->arg.symlink.pages = &page;
 550         data->arg.symlink.pathlen = len;
 551         data->arg.symlink.sattr = sattr;
 552
 553         status = nfs3_do_create(dir, dentry, data);
 554
 555         nfs3_free_createdata(data);
 556 out:
 557         dprintk("NFS reply symlink: %d\n", status);
 558         return status;
 559 }
 560
 561 static int
 562 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 563 {
 564         struct nfs3_createdata *data;
 565         int mode = sattr->ia_mode;
 566         int status = -ENOMEM;
 567
 568         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 569
 570         sattr->ia_mode &= ~current_umask();
 571
 572         data = nfs3_alloc_createdata();
 573         if (data == NULL)
 574                 goto out;
 575
 576         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 577         data->arg.mkdir.fh = NFS_FH(dir);
 578         data->arg.mkdir.name = dentry->d_name.name;
 579         data->arg.mkdir.len = dentry->d_name.len;
 580         data->arg.mkdir.sattr = sattr;
 581
 582         status = nfs3_do_create(dir, dentry, data);
 583         if (status != 0)
 584                 goto out;
 585
 586         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 587 out:
 588         nfs3_free_createdata(data);
 589         dprintk("NFS reply mkdir: %d\n", status);
 590         return status;
 591 }
 592
 593 static int
 594 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 595 {
 596         struct nfs_fattr        *dir_attr;
 597         struct nfs3_diropargs   arg = {
 598                 .fh             = NFS_FH(dir),
 599                 .name           = name->name,
 600                 .len            = name->len
 601         };
 602         struct rpc_message msg = {
 603                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 604                 .rpc_argp       = &arg,
 605         };
 606         int status = -ENOMEM;
 607
 608         dprintk("NFS call  rmdir %s\n", name->name);
 609         dir_attr = nfs_alloc_fattr();
 610         if (dir_attr == NULL)
 611                 goto out;
 612
 613         msg.rpc_resp = dir_attr;
 614         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 615         nfs_post_op_update_inode(dir, dir_attr);
 616         nfs_free_fattr(dir_attr);
 617 out:
 618         dprintk("NFS reply rmdir: %d\n", status);
 619         return status;
 620 }
 621
 622 /*
 623  * The READDIR implementation is somewhat hackish - we pass the user buffer
 624  * to the encode function, which installs it in the receive iovec.
 625  * The decode function itself doesn't perform any decoding, it just makes
 626  * sure the reply is syntactically correct.
 627  *
 628  * Also note that this implementation handles both plain readdir and
 629  * readdirplus.
 630  */
 631 static int
 632 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 633                   u64 cookie, struct page **pages, unsigned int count, int plus)
 634 {
 635         struct inode            *dir = dentry->d_inode;
 636         __be32                  *verf = NFS_COOKIEVERF(dir);
 637         struct nfs3_readdirargs arg = {
 638                 .fh             = NFS_FH(dir),
 639                 .cookie         = cookie,
 640                 .verf           = {verf[0], verf[1]},
 641                 .plus           = plus,
 642                 .count          = count,
 643                 .pages          = pages
 644         };
 645         struct nfs3_readdirres  res = {
 646                 .verf           = verf,
 647                 .plus           = plus
 648         };
 649         struct rpc_message      msg = {
 650                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 651                 .rpc_argp       = &arg,
 652                 .rpc_resp       = &res,
 653                 .rpc_cred       = cred
 654         };
 655         int status = -ENOMEM;
 656
 657         if (plus)
 658                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 659
 660         dprintk("NFS call  readdir%s %d\n",
 661                         plus? "plus" : "", (unsigned int) cookie);
 662
 663         res.dir_attr = nfs_alloc_fattr();
 664         if (res.dir_attr == NULL)
 665                 goto out;
 666
 667         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 668
 669         nfs_invalidate_atime(dir);
 670         nfs_refresh_inode(dir, res.dir_attr);
 671
 672         nfs_free_fattr(res.dir_attr);
 673 out:
 674         dprintk("NFS reply readdir%s: %d\n",
 675                         plus? "plus" : "", status);
 676         return status;
 677 }
 678
 679 static int
 680 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 681                 dev_t rdev)
 682 {
 683         struct nfs3_createdata *data;
 684         mode_t mode = sattr->ia_mode;
 685         int status = -ENOMEM;
 686
 687         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 688                         MAJOR(rdev), MINOR(rdev));
 689
 690         sattr->ia_mode &= ~current_umask();
 691
 692         data = nfs3_alloc_createdata();
 693         if (data == NULL)
 694                 goto out;
 695
 696         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 697         data->arg.mknod.fh = NFS_FH(dir);
 698         data->arg.mknod.name = dentry->d_name.name;
 699         data->arg.mknod.len = dentry->d_name.len;
 700         data->arg.mknod.sattr = sattr;
 701         data->arg.mknod.rdev = rdev;
 702
 703         switch (sattr->ia_mode & S_IFMT) {
 704         case S_IFBLK:
 705                 data->arg.mknod.type = NF3BLK;
 706                 break;
 707         case S_IFCHR:
 708                 data->arg.mknod.type = NF3CHR;
 709                 break;
 710         case S_IFIFO:
 711                 data->arg.mknod.type = NF3FIFO;
 712                 break;
 713         case S_IFSOCK:
 714                 data->arg.mknod.type = NF3SOCK;
 715                 break;
 716         default:
 717                 status = -EINVAL;
 718                 goto out;
 719         }
 720
 721         status = nfs3_do_create(dir, dentry, data);
 722         if (status != 0)
 723                 goto out;
 724         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 725 out:
 726         nfs3_free_createdata(data);
 727         dprintk("NFS reply mknod: %d\n", status);
 728         return status;
 729 }
 730
 731 static int
 732 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 733                  struct nfs_fsstat *stat)
 734 {
 735         struct rpc_message msg = {
 736                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 737                 .rpc_argp       = fhandle,
 738                 .rpc_resp       = stat,
 739         };
 740         int     status;
 741
 742         dprintk("NFS call  fsstat\n");
 743         nfs_fattr_init(stat->fattr);
 744         status = rpc_call_sync(server->client, &msg, 0);
 745         dprintk("NFS reply fsstat: %d\n", status);
 746         return status;
 747 }
 748
 749 static int
 750 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 751                  struct nfs_fsinfo *info)
 752 {
 753         struct rpc_message msg = {
 754                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 755                 .rpc_argp       = fhandle,
 756                 .rpc_resp       = info,
 757         };
 758         int     status;
 759
 760         dprintk("NFS call  fsinfo\n");
 761         nfs_fattr_init(info->fattr);
 762         status = rpc_call_sync(client, &msg, 0);
 763         dprintk("NFS reply fsinfo: %d\n", status);
 764         return status;
 765 }
 766
 767 /*
 768  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 769  * nfs_create_server
 770  */
 771 static int
 772 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 773                    struct nfs_fsinfo *info)
 774 {
 775         int     status;
 776
 777         status = do_proc_fsinfo(server->client, fhandle, info);
 778         if (status && server->nfs_client->cl_rpcclient != server->client)
 779                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 780         return status;
 781 }
 782
 783 static int
 784 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 785                    struct nfs_pathconf *info)
 786 {
 787         struct rpc_message msg = {
 788                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 789                 .rpc_argp       = fhandle,
 790                 .rpc_resp       = info,
 791         };
 792         int     status;
 793
 794         dprintk("NFS call  pathconf\n");
 795         nfs_fattr_init(info->fattr);
 796         status = rpc_call_sync(server->client, &msg, 0);
 797         dprintk("NFS reply pathconf: %d\n", status);
 798         return status;
 799 }
 800
 801 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 802 {
 803         if (nfs3_async_handle_jukebox(task, data->inode))
 804                 return -EAGAIN;
 805
 806         nfs_invalidate_atime(data->inode);
 807         nfs_refresh_inode(data->inode, &data->fattr);
 808         return 0;
 809 }
 810
 811 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 812 {
 813         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 814 }
 815
 816 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 817 {
 818         if (nfs3_async_handle_jukebox(task, data->inode))
 819                 return -EAGAIN;
 820         if (task->tk_status >= 0)
 821                 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
 822         return 0;
 823 }
 824
 825 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 826 {
 827         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 828 }
 829
 830 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 831 {
 832         if (nfs3_async_handle_jukebox(task, data->inode))
 833                 return -EAGAIN;
 834         nfs_refresh_inode(data->inode, data->res.fattr);
 835         return 0;
 836 }
 837
 838 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 839 {
 840         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 841 }
 842
 843 static int
 844 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 845 {
 846         struct inode *inode = filp->f_path.dentry->d_inode;
 847
 848         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 849 }
 850
 851 const struct nfs_rpc_ops nfs_v3_clientops = {
 852         .version        = 3,                    /* protocol version */
 853         .dentry_ops     = &nfs_dentry_operations,
 854         .dir_inode_ops  = &nfs3_dir_inode_operations,
 855         .file_inode_ops = &nfs3_file_inode_operations,
 856         .getroot        = nfs3_proc_get_root,
 857         .getattr        = nfs3_proc_getattr,
 858         .setattr        = nfs3_proc_setattr,
 859         .lookup         = nfs3_proc_lookup,
 860         .access         = nfs3_proc_access,
 861         .readlink       = nfs3_proc_readlink,
 862         .create         = nfs3_proc_create,
 863         .remove         = nfs3_proc_remove,
 864         .unlink_setup   = nfs3_proc_unlink_setup,
 865         .unlink_done    = nfs3_proc_unlink_done,
 866         .rename         = nfs3_proc_rename,
 867         .rename_setup   = nfs3_proc_rename_setup,
 868         .rename_done    = nfs3_proc_rename_done,
 869         .link           = nfs3_proc_link,
 870         .symlink        = nfs3_proc_symlink,
 871         .mkdir          = nfs3_proc_mkdir,
 872         .rmdir          = nfs3_proc_rmdir,
 873         .readdir        = nfs3_proc_readdir,
 874         .mknod          = nfs3_proc_mknod,
 875         .statfs         = nfs3_proc_statfs,
 876         .fsinfo         = nfs3_proc_fsinfo,
 877         .pathconf       = nfs3_proc_pathconf,
 878         .decode_dirent  = nfs3_decode_dirent,
 879         .read_setup     = nfs3_proc_read_setup,
 880         .read_done      = nfs3_read_done,
 881         .write_setup    = nfs3_proc_write_setup,
 882         .write_done     = nfs3_write_done,
 883         .commit_setup   = nfs3_proc_commit_setup,
 884         .commit_done    = nfs3_commit_done,
 885         .lock           = nfs3_proc_lock,
 886         .clear_acl_cache = nfs3_forget_cached_acls,
 887         .close_context  = nfs_close_context,
 888 };