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/nfs.h>
  14 #include <linux/nfs3.h>
  15 #include <linux/nfs_fs.h>
  16 #include <linux/nfs_page.h>
  17 #include <linux/lockd/bind.h>
  18 #include <linux/nfs_mount.h>
  19
  20 #include "iostat.h"
  21 #include "internal.h"
  22
  23 #define NFSDBG_FACILITY         NFSDBG_PROC
  24
  25 /* A wrapper to handle the EJUKEBOX error message */
  26 static int
  27 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  28 {
  29         int res;
  30         do {
  31                 res = rpc_call_sync(clnt, msg, flags);
  32                 if (res != -EJUKEBOX)
  33                         break;
  34                 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
  35                 res = -ERESTARTSYS;
  36         } while (!fatal_signal_pending(current));
  37         return res;
  38 }
  39
  40 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  41
  42 static int
  43 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  44 {
  45         if (task->tk_status != -EJUKEBOX)
  46                 return 0;
  47         nfs_inc_stats(inode, NFSIOS_DELAY);
  48         task->tk_status = 0;
  49         rpc_restart_call(task);
  50         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  51         return 1;
  52 }
  53
  54 static int
  55 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  56                  struct nfs_fsinfo *info)
  57 {
  58         struct rpc_message msg = {
  59                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  60                 .rpc_argp       = fhandle,
  61                 .rpc_resp       = info,
  62         };
  63         int     status;
  64
  65         dprintk("%s: call  fsinfo\n", __func__);
  66         nfs_fattr_init(info->fattr);
  67         status = rpc_call_sync(client, &msg, 0);
  68         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  69         if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  70                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  71                 msg.rpc_resp = info->fattr;
  72                 status = rpc_call_sync(client, &msg, 0);
  73                 dprintk("%s: reply getattr: %d\n", __func__, status);
  74         }
  75         return status;
  76 }
  77
  78 /*
  79  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  80  */
  81 static int
  82 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  83                    struct nfs_fsinfo *info)
  84 {
  85         int     status;
  86
  87         status = do_proc_get_root(server->client, fhandle, info);
  88         if (status && server->nfs_client->cl_rpcclient != server->client)
  89                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  90         return status;
  91 }
  92
  93 /*
  94  * One function for each procedure in the NFS protocol.
  95  */
  96 static int
  97 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
  98                 struct nfs_fattr *fattr)
  99 {
 100         struct rpc_message msg = {
 101                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 102                 .rpc_argp       = fhandle,
 103                 .rpc_resp       = fattr,
 104         };
 105         int     status;
 106
 107         dprintk("NFS call  getattr\n");
 108         nfs_fattr_init(fattr);
 109         status = rpc_call_sync(server->client, &msg, 0);
 110         dprintk("NFS reply getattr: %d\n", status);
 111         return status;
 112 }
 113
 114 static int
 115 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 116                         struct iattr *sattr)
 117 {
 118         struct inode *inode = dentry->d_inode;
 119         struct nfs3_sattrargs   arg = {
 120                 .fh             = NFS_FH(inode),
 121                 .sattr          = sattr,
 122         };
 123         struct rpc_message msg = {
 124                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 125                 .rpc_argp       = &arg,
 126                 .rpc_resp       = fattr,
 127         };
 128         int     status;
 129
 130         dprintk("NFS call  setattr\n");
 131         if (sattr->ia_valid & ATTR_FILE)
 132                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 133         nfs_fattr_init(fattr);
 134         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 135         if (status == 0)
 136                 nfs_setattr_update_inode(inode, sattr);
 137         dprintk("NFS reply setattr: %d\n", status);
 138         return status;
 139 }
 140
 141 static int
 142 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 143                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 144 {
 145         struct nfs_fattr        dir_attr;
 146         struct nfs3_diropargs   arg = {
 147                 .fh             = NFS_FH(dir),
 148                 .name           = name->name,
 149                 .len            = name->len
 150         };
 151         struct nfs3_diropres    res = {
 152                 .dir_attr       = &dir_attr,
 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         nfs_fattr_init(&dir_attr);
 165         nfs_fattr_init(fattr);
 166         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 167         nfs_refresh_inode(dir, &dir_attr);
 168         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 169                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 170                 msg.rpc_argp = fhandle;
 171                 msg.rpc_resp = fattr;
 172                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 173         }
 174         dprintk("NFS reply lookup: %d\n", status);
 175         return status;
 176 }
 177
 178 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 179 {
 180         struct nfs_fattr        fattr;
 181         struct nfs3_accessargs  arg = {
 182                 .fh             = NFS_FH(inode),
 183         };
 184         struct nfs3_accessres   res = {
 185                 .fattr          = &fattr,
 186         };
 187         struct rpc_message msg = {
 188                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 189                 .rpc_argp       = &arg,
 190                 .rpc_resp       = &res,
 191                 .rpc_cred       = entry->cred,
 192         };
 193         int mode = entry->mask;
 194         int status;
 195
 196         dprintk("NFS call  access\n");
 197
 198         if (mode & MAY_READ)
 199                 arg.access |= NFS3_ACCESS_READ;
 200         if (S_ISDIR(inode->i_mode)) {
 201                 if (mode & MAY_WRITE)
 202                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 203                 if (mode & MAY_EXEC)
 204                         arg.access |= NFS3_ACCESS_LOOKUP;
 205         } else {
 206                 if (mode & MAY_WRITE)
 207                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 208                 if (mode & MAY_EXEC)
 209                         arg.access |= NFS3_ACCESS_EXECUTE;
 210         }
 211         nfs_fattr_init(&fattr);
 212         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 213         nfs_refresh_inode(inode, &fattr);
 214         if (status == 0) {
 215                 entry->mask = 0;
 216                 if (res.access & NFS3_ACCESS_READ)
 217                         entry->mask |= MAY_READ;
 218                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 219                         entry->mask |= MAY_WRITE;
 220                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 221                         entry->mask |= MAY_EXEC;
 222         }
 223         dprintk("NFS reply access: %d\n", status);
 224         return status;
 225 }
 226
 227 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 228                 unsigned int pgbase, unsigned int pglen)
 229 {
 230         struct nfs_fattr        fattr;
 231         struct nfs3_readlinkargs args = {
 232                 .fh             = NFS_FH(inode),
 233                 .pgbase         = pgbase,
 234                 .pglen          = pglen,
 235                 .pages          = &page
 236         };
 237         struct rpc_message msg = {
 238                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 239                 .rpc_argp       = &args,
 240                 .rpc_resp       = &fattr,
 241         };
 242         int                     status;
 243
 244         dprintk("NFS call  readlink\n");
 245         nfs_fattr_init(&fattr);
 246         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 247         nfs_refresh_inode(inode, &fattr);
 248         dprintk("NFS reply readlink: %d\n", status);
 249         return status;
 250 }
 251
 252 struct nfs3_createdata {
 253         struct rpc_message msg;
 254         union {
 255                 struct nfs3_createargs create;
 256                 struct nfs3_mkdirargs mkdir;
 257                 struct nfs3_symlinkargs symlink;
 258                 struct nfs3_mknodargs mknod;
 259         } arg;
 260         struct nfs3_diropres res;
 261         struct nfs_fh fh;
 262         struct nfs_fattr fattr;
 263         struct nfs_fattr dir_attr;
 264 };
 265
 266 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 267 {
 268         struct nfs3_createdata *data;
 269
 270         data = kzalloc(sizeof(*data), GFP_KERNEL);
 271         if (data != NULL) {
 272                 data->msg.rpc_argp = &data->arg;
 273                 data->msg.rpc_resp = &data->res;
 274                 data->res.fh = &data->fh;
 275                 data->res.fattr = &data->fattr;
 276                 data->res.dir_attr = &data->dir_attr;
 277                 nfs_fattr_init(data->res.fattr);
 278                 nfs_fattr_init(data->res.dir_attr);
 279         }
 280         return data;
 281 }
 282
 283 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 284 {
 285         int status;
 286
 287         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 288         nfs_post_op_update_inode(dir, data->res.dir_attr);
 289         if (status == 0)
 290                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
 291         return status;
 292 }
 293
 294 static void nfs3_free_createdata(struct nfs3_createdata *data)
 295 {
 296         kfree(data);
 297 }
 298
 299 /*
 300  * Create a regular file.
 301  */
 302 static int
 303 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 304                  int flags, struct nameidata *nd)
 305 {
 306         struct nfs3_createdata *data;
 307         mode_t mode = sattr->ia_mode;
 308         int status = -ENOMEM;
 309
 310         dprintk("NFS call  create %s\n", dentry->d_name.name);
 311
 312         data = nfs3_alloc_createdata();
 313         if (data == NULL)
 314                 goto out;
 315
 316         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 317         data->arg.create.fh = NFS_FH(dir);
 318         data->arg.create.name = dentry->d_name.name;
 319         data->arg.create.len = dentry->d_name.len;
 320         data->arg.create.sattr = sattr;
 321
 322         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 323         if (flags & O_EXCL) {
 324                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 325                 data->arg.create.verifier[0] = jiffies;
 326                 data->arg.create.verifier[1] = current->pid;
 327         }
 328
 329         sattr->ia_mode &= ~current_umask();
 330
 331         for (;;) {
 332                 status = nfs3_do_create(dir, dentry, data);
 333
 334                 if (status != -ENOTSUPP)
 335                         break;
 336                 /* If the server doesn't support the exclusive creation
 337                  * semantics, try again with simple 'guarded' mode. */
 338                 switch (data->arg.create.createmode) {
 339                         case NFS3_CREATE_EXCLUSIVE:
 340                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 341                                 break;
 342
 343                         case NFS3_CREATE_GUARDED:
 344                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 345                                 break;
 346
 347                         case NFS3_CREATE_UNCHECKED:
 348                                 goto out;
 349                 }
 350                 nfs_fattr_init(data->res.dir_attr);
 351                 nfs_fattr_init(data->res.fattr);
 352         }
 353
 354         if (status != 0)
 355                 goto out;
 356
 357         /* When we created the file with exclusive semantics, make
 358          * sure we set the attributes afterwards. */
 359         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 360                 dprintk("NFS call  setattr (post-create)\n");
 361
 362                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 363                         sattr->ia_valid |= ATTR_ATIME;
 364                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 365                         sattr->ia_valid |= ATTR_MTIME;
 366
 367                 /* Note: we could use a guarded setattr here, but I'm
 368                  * not sure this buys us anything (and I'd have
 369                  * to revamp the NFSv3 XDR code) */
 370                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 371                 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
 372                 dprintk("NFS reply setattr (post-create): %d\n", status);
 373                 if (status != 0)
 374                         goto out;
 375         }
 376         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 377 out:
 378         nfs3_free_createdata(data);
 379         dprintk("NFS reply create: %d\n", status);
 380         return status;
 381 }
 382
 383 static int
 384 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 385 {
 386         struct nfs_removeargs arg = {
 387                 .fh = NFS_FH(dir),
 388                 .name.len = name->len,
 389                 .name.name = name->name,
 390         };
 391         struct nfs_removeres res;
 392         struct rpc_message msg = {
 393                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 394                 .rpc_argp = &arg,
 395                 .rpc_resp = &res,
 396         };
 397         int                     status;
 398
 399         dprintk("NFS call  remove %s\n", name->name);
 400         nfs_fattr_init(&res.dir_attr);
 401         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 402         nfs_post_op_update_inode(dir, &res.dir_attr);
 403         dprintk("NFS reply remove: %d\n", status);
 404         return status;
 405 }
 406
 407 static void
 408 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 409 {
 410         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 411 }
 412
 413 static int
 414 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 415 {
 416         struct nfs_removeres *res;
 417         if (nfs3_async_handle_jukebox(task, dir))
 418                 return 0;
 419         res = task->tk_msg.rpc_resp;
 420         nfs_post_op_update_inode(dir, &res->dir_attr);
 421         return 1;
 422 }
 423
 424 static int
 425 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 426                  struct inode *new_dir, struct qstr *new_name)
 427 {
 428         struct nfs_fattr        old_dir_attr, new_dir_attr;
 429         struct nfs3_renameargs  arg = {
 430                 .fromfh         = NFS_FH(old_dir),
 431                 .fromname       = old_name->name,
 432                 .fromlen        = old_name->len,
 433                 .tofh           = NFS_FH(new_dir),
 434                 .toname         = new_name->name,
 435                 .tolen          = new_name->len
 436         };
 437         struct nfs3_renameres   res = {
 438                 .fromattr       = &old_dir_attr,
 439                 .toattr         = &new_dir_attr
 440         };
 441         struct rpc_message msg = {
 442                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RENAME],
 443                 .rpc_argp       = &arg,
 444                 .rpc_resp       = &res,
 445         };
 446         int                     status;
 447
 448         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 449         nfs_fattr_init(&old_dir_attr);
 450         nfs_fattr_init(&new_dir_attr);
 451         status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
 452         nfs_post_op_update_inode(old_dir, &old_dir_attr);
 453         nfs_post_op_update_inode(new_dir, &new_dir_attr);
 454         dprintk("NFS reply rename: %d\n", status);
 455         return status;
 456 }
 457
 458 static int
 459 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 460 {
 461         struct nfs_fattr        dir_attr, fattr;
 462         struct nfs3_linkargs    arg = {
 463                 .fromfh         = NFS_FH(inode),
 464                 .tofh           = NFS_FH(dir),
 465                 .toname         = name->name,
 466                 .tolen          = name->len
 467         };
 468         struct nfs3_linkres     res = {
 469                 .dir_attr       = &dir_attr,
 470                 .fattr          = &fattr
 471         };
 472         struct rpc_message msg = {
 473                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 474                 .rpc_argp       = &arg,
 475                 .rpc_resp       = &res,
 476         };
 477         int                     status;
 478
 479         dprintk("NFS call  link %s\n", name->name);
 480         nfs_fattr_init(&dir_attr);
 481         nfs_fattr_init(&fattr);
 482         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 483         nfs_post_op_update_inode(dir, &dir_attr);
 484         nfs_post_op_update_inode(inode, &fattr);
 485         dprintk("NFS reply link: %d\n", status);
 486         return status;
 487 }
 488
 489 static int
 490 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 491                   unsigned int len, struct iattr *sattr)
 492 {
 493         struct nfs3_createdata *data;
 494         int status = -ENOMEM;
 495
 496         if (len > NFS3_MAXPATHLEN)
 497                 return -ENAMETOOLONG;
 498
 499         dprintk("NFS call  symlink %s\n", dentry->d_name.name);
 500
 501         data = nfs3_alloc_createdata();
 502         if (data == NULL)
 503                 goto out;
 504         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 505         data->arg.symlink.fromfh = NFS_FH(dir);
 506         data->arg.symlink.fromname = dentry->d_name.name;
 507         data->arg.symlink.fromlen = dentry->d_name.len;
 508         data->arg.symlink.pages = &page;
 509         data->arg.symlink.pathlen = len;
 510         data->arg.symlink.sattr = sattr;
 511
 512         status = nfs3_do_create(dir, dentry, data);
 513
 514         nfs3_free_createdata(data);
 515 out:
 516         dprintk("NFS reply symlink: %d\n", status);
 517         return status;
 518 }
 519
 520 static int
 521 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 522 {
 523         struct nfs3_createdata *data;
 524         int mode = sattr->ia_mode;
 525         int status = -ENOMEM;
 526
 527         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 528
 529         sattr->ia_mode &= ~current_umask();
 530
 531         data = nfs3_alloc_createdata();
 532         if (data == NULL)
 533                 goto out;
 534
 535         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 536         data->arg.mkdir.fh = NFS_FH(dir);
 537         data->arg.mkdir.name = dentry->d_name.name;
 538         data->arg.mkdir.len = dentry->d_name.len;
 539         data->arg.mkdir.sattr = sattr;
 540
 541         status = nfs3_do_create(dir, dentry, data);
 542         if (status != 0)
 543                 goto out;
 544
 545         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 546 out:
 547         nfs3_free_createdata(data);
 548         dprintk("NFS reply mkdir: %d\n", status);
 549         return status;
 550 }
 551
 552 static int
 553 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 554 {
 555         struct nfs_fattr        dir_attr;
 556         struct nfs3_diropargs   arg = {
 557                 .fh             = NFS_FH(dir),
 558                 .name           = name->name,
 559                 .len            = name->len
 560         };
 561         struct rpc_message msg = {
 562                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 563                 .rpc_argp       = &arg,
 564                 .rpc_resp       = &dir_attr,
 565         };
 566         int                     status;
 567
 568         dprintk("NFS call  rmdir %s\n", name->name);
 569         nfs_fattr_init(&dir_attr);
 570         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 571         nfs_post_op_update_inode(dir, &dir_attr);
 572         dprintk("NFS reply rmdir: %d\n", status);
 573         return status;
 574 }
 575
 576 /*
 577  * The READDIR implementation is somewhat hackish - we pass the user buffer
 578  * to the encode function, which installs it in the receive iovec.
 579  * The decode function itself doesn't perform any decoding, it just makes
 580  * sure the reply is syntactically correct.
 581  *
 582  * Also note that this implementation handles both plain readdir and
 583  * readdirplus.
 584  */
 585 static int
 586 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 587                   u64 cookie, struct page *page, unsigned int count, int plus)
 588 {
 589         struct inode            *dir = dentry->d_inode;
 590         struct nfs_fattr        dir_attr;
 591         __be32                  *verf = NFS_COOKIEVERF(dir);
 592         struct nfs3_readdirargs arg = {
 593                 .fh             = NFS_FH(dir),
 594                 .cookie         = cookie,
 595                 .verf           = {verf[0], verf[1]},
 596                 .plus           = plus,
 597                 .count          = count,
 598                 .pages          = &page
 599         };
 600         struct nfs3_readdirres  res = {
 601                 .dir_attr       = &dir_attr,
 602                 .verf           = verf,
 603                 .plus           = plus
 604         };
 605         struct rpc_message      msg = {
 606                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 607                 .rpc_argp       = &arg,
 608                 .rpc_resp       = &res,
 609                 .rpc_cred       = cred
 610         };
 611         int                     status;
 612
 613         if (plus)
 614                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 615
 616         dprintk("NFS call  readdir%s %d\n",
 617                         plus? "plus" : "", (unsigned int) cookie);
 618
 619         nfs_fattr_init(&dir_attr);
 620         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 621
 622         nfs_invalidate_atime(dir);
 623
 624         nfs_refresh_inode(dir, &dir_attr);
 625         dprintk("NFS reply readdir: %d\n", status);
 626         return status;
 627 }
 628
 629 static int
 630 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 631                 dev_t rdev)
 632 {
 633         struct nfs3_createdata *data;
 634         mode_t mode = sattr->ia_mode;
 635         int status = -ENOMEM;
 636
 637         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 638                         MAJOR(rdev), MINOR(rdev));
 639
 640         sattr->ia_mode &= ~current_umask();
 641
 642         data = nfs3_alloc_createdata();
 643         if (data == NULL)
 644                 goto out;
 645
 646         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 647         data->arg.mknod.fh = NFS_FH(dir);
 648         data->arg.mknod.name = dentry->d_name.name;
 649         data->arg.mknod.len = dentry->d_name.len;
 650         data->arg.mknod.sattr = sattr;
 651         data->arg.mknod.rdev = rdev;
 652
 653         switch (sattr->ia_mode & S_IFMT) {
 654         case S_IFBLK:
 655                 data->arg.mknod.type = NF3BLK;
 656                 break;
 657         case S_IFCHR:
 658                 data->arg.mknod.type = NF3CHR;
 659                 break;
 660         case S_IFIFO:
 661                 data->arg.mknod.type = NF3FIFO;
 662                 break;
 663         case S_IFSOCK:
 664                 data->arg.mknod.type = NF3SOCK;
 665                 break;
 666         default:
 667                 status = -EINVAL;
 668                 goto out;
 669         }
 670
 671         status = nfs3_do_create(dir, dentry, data);
 672         if (status != 0)
 673                 goto out;
 674         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 675 out:
 676         nfs3_free_createdata(data);
 677         dprintk("NFS reply mknod: %d\n", status);
 678         return status;
 679 }
 680
 681 static int
 682 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 683                  struct nfs_fsstat *stat)
 684 {
 685         struct rpc_message msg = {
 686                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 687                 .rpc_argp       = fhandle,
 688                 .rpc_resp       = stat,
 689         };
 690         int     status;
 691
 692         dprintk("NFS call  fsstat\n");
 693         nfs_fattr_init(stat->fattr);
 694         status = rpc_call_sync(server->client, &msg, 0);
 695         dprintk("NFS reply statfs: %d\n", status);
 696         return status;
 697 }
 698
 699 static int
 700 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 701                  struct nfs_fsinfo *info)
 702 {
 703         struct rpc_message msg = {
 704                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 705                 .rpc_argp       = fhandle,
 706                 .rpc_resp       = info,
 707         };
 708         int     status;
 709
 710         dprintk("NFS call  fsinfo\n");
 711         nfs_fattr_init(info->fattr);
 712         status = rpc_call_sync(client, &msg, 0);
 713         dprintk("NFS reply fsinfo: %d\n", status);
 714         return status;
 715 }
 716
 717 /*
 718  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 719  * nfs_create_server
 720  */
 721 static int
 722 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 723                    struct nfs_fsinfo *info)
 724 {
 725         int     status;
 726
 727         status = do_proc_fsinfo(server->client, fhandle, info);
 728         if (status && server->nfs_client->cl_rpcclient != server->client)
 729                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 730         return status;
 731 }
 732
 733 static int
 734 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 735                    struct nfs_pathconf *info)
 736 {
 737         struct rpc_message msg = {
 738                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 739                 .rpc_argp       = fhandle,
 740                 .rpc_resp       = info,
 741         };
 742         int     status;
 743
 744         dprintk("NFS call  pathconf\n");
 745         nfs_fattr_init(info->fattr);
 746         status = rpc_call_sync(server->client, &msg, 0);
 747         dprintk("NFS reply pathconf: %d\n", status);
 748         return status;
 749 }
 750
 751 static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 752 {
 753         if (nfs3_async_handle_jukebox(task, data->inode))
 754                 return -EAGAIN;
 755
 756         nfs_invalidate_atime(data->inode);
 757         nfs_refresh_inode(data->inode, &data->fattr);
 758         return 0;
 759 }
 760
 761 static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 762 {
 763         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 764 }
 765
 766 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
 767 {
 768         if (nfs3_async_handle_jukebox(task, data->inode))
 769                 return -EAGAIN;
 770         if (task->tk_status >= 0)
 771                 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr);
 772         return 0;
 773 }
 774
 775 static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 776 {
 777         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 778 }
 779
 780 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 781 {
 782         if (nfs3_async_handle_jukebox(task, data->inode))
 783                 return -EAGAIN;
 784         nfs_refresh_inode(data->inode, data->res.fattr);
 785         return 0;
 786 }
 787
 788 static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 789 {
 790         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 791 }
 792
 793 static int
 794 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 795 {
 796         struct inode *inode = filp->f_path.dentry->d_inode;
 797
 798         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 799 }
 800
 801 const struct nfs_rpc_ops nfs_v3_clientops = {
 802         .version        = 3,                    /* protocol version */
 803         .dentry_ops     = &nfs_dentry_operations,
 804         .dir_inode_ops  = &nfs3_dir_inode_operations,
 805         .file_inode_ops = &nfs3_file_inode_operations,
 806         .getroot        = nfs3_proc_get_root,
 807         .getattr        = nfs3_proc_getattr,
 808         .setattr        = nfs3_proc_setattr,
 809         .lookup         = nfs3_proc_lookup,
 810         .access         = nfs3_proc_access,
 811         .readlink       = nfs3_proc_readlink,
 812         .create         = nfs3_proc_create,
 813         .remove         = nfs3_proc_remove,
 814         .unlink_setup   = nfs3_proc_unlink_setup,
 815         .unlink_done    = nfs3_proc_unlink_done,
 816         .rename         = nfs3_proc_rename,
 817         .link           = nfs3_proc_link,
 818         .symlink        = nfs3_proc_symlink,
 819         .mkdir          = nfs3_proc_mkdir,
 820         .rmdir          = nfs3_proc_rmdir,
 821         .readdir        = nfs3_proc_readdir,
 822         .mknod          = nfs3_proc_mknod,
 823         .statfs         = nfs3_proc_statfs,
 824         .fsinfo         = nfs3_proc_fsinfo,
 825         .pathconf       = nfs3_proc_pathconf,
 826         .decode_dirent  = nfs3_decode_dirent,
 827         .read_setup     = nfs3_proc_read_setup,
 828         .read_done      = nfs3_read_done,
 829         .write_setup    = nfs3_proc_write_setup,
 830         .write_done     = nfs3_write_done,
 831         .commit_setup   = nfs3_proc_commit_setup,
 832         .commit_done    = nfs3_commit_done,
 833         .lock           = nfs3_proc_lock,
 834         .clear_acl_cache = nfs3_forget_cached_acls,
 835         .close_context  = nfs_close_context,
 836 };