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/utsname.h>
  11 #include <linux/errno.h>
  12 #include <linux/string.h>
  13 #include <linux/sunrpc/clnt.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/smp_lock.h>
  20 #include <linux/nfs_mount.h>
  21
  22 #define NFSDBG_FACILITY         NFSDBG_PROC
  23
  24 extern struct rpc_procinfo nfs3_procedures[];
  25
  26 /* A wrapper to handle the EJUKEBOX error message */
  27 static int
  28 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  29 {
  30         sigset_t oldset;
  31         int res;
  32         rpc_clnt_sigmask(clnt, &oldset);
  33         do {
  34                 res = rpc_call_sync(clnt, msg, flags);
  35                 if (res != -EJUKEBOX)
  36                         break;
  37                 schedule_timeout_interruptible(NFS_JUKEBOX_RETRY_TIME);
  38                 res = -ERESTARTSYS;
  39         } while (!signalled());
  40         rpc_clnt_sigunmask(clnt, &oldset);
  41         return res;
  42 }
  43
  44 static inline int
  45 nfs3_rpc_call_wrapper(struct rpc_clnt *clnt, u32 proc, void *argp, void *resp, int flags)
  46 {
  47         struct rpc_message msg = {
  48                 .rpc_proc       = &clnt->cl_procinfo[proc],
  49                 .rpc_argp       = argp,
  50                 .rpc_resp       = resp,
  51         };
  52         return nfs3_rpc_wrapper(clnt, &msg, flags);
  53 }
  54
  55 #define rpc_call(clnt, proc, argp, resp, flags) \
  56                 nfs3_rpc_call_wrapper(clnt, proc, argp, resp, flags)
  57 #define rpc_call_sync(clnt, msg, flags) \
  58                 nfs3_rpc_wrapper(clnt, msg, flags)
  59
  60 static int
  61 nfs3_async_handle_jukebox(struct rpc_task *task)
  62 {
  63         if (task->tk_status != -EJUKEBOX)
  64                 return 0;
  65         task->tk_status = 0;
  66         rpc_restart_call(task);
  67         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  68         return 1;
  69 }
  70
  71 /*
  72  * Bare-bones access to getattr: this is for nfs_read_super.
  73  */
  74 static int
  75 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  76                    struct nfs_fsinfo *info)
  77 {
  78         int     status;
  79
  80         dprintk("%s: call  fsinfo\n", __FUNCTION__);
  81         info->fattr->valid = 0;
  82         status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0);
  83         dprintk("%s: reply fsinfo: %d\n", __FUNCTION__, status);
  84         if (!(info->fattr->valid & NFS_ATTR_FATTR)) {
  85                 status = rpc_call(server->client_sys, NFS3PROC_GETATTR, fhandle, info->fattr, 0);
  86                 dprintk("%s: reply getattr: %d\n", __FUNCTION__, status);
  87         }
  88         return status;
  89 }
  90
  91 /*
  92  * One function for each procedure in the NFS protocol.
  93  */
  94 static int
  95 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
  96                 struct nfs_fattr *fattr)
  97 {
  98         int     status;
  99
 100         dprintk("NFS call  getattr\n");
 101         fattr->valid = 0;
 102         status = rpc_call(server->client, NFS3PROC_GETATTR,
 103                           fhandle, fattr, 0);
 104         dprintk("NFS reply getattr: %d\n", status);
 105         return status;
 106 }
 107
 108 static int
 109 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 110                         struct iattr *sattr)
 111 {
 112         struct inode *inode = dentry->d_inode;
 113         struct nfs3_sattrargs   arg = {
 114                 .fh             = NFS_FH(inode),
 115                 .sattr          = sattr,
 116         };
 117         int     status;
 118
 119         dprintk("NFS call  setattr\n");
 120         fattr->valid = 0;
 121         status = rpc_call(NFS_CLIENT(inode), NFS3PROC_SETATTR, &arg, fattr, 0);
 122         if (status == 0)
 123                 nfs_setattr_update_inode(inode, sattr);
 124         dprintk("NFS reply setattr: %d\n", status);
 125         return status;
 126 }
 127
 128 static int
 129 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 130                  struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 131 {
 132         struct nfs_fattr        dir_attr;
 133         struct nfs3_diropargs   arg = {
 134                 .fh             = NFS_FH(dir),
 135                 .name           = name->name,
 136                 .len            = name->len
 137         };
 138         struct nfs3_diropres    res = {
 139                 .dir_attr       = &dir_attr,
 140                 .fh             = fhandle,
 141                 .fattr          = fattr
 142         };
 143         int                     status;
 144
 145         dprintk("NFS call  lookup %s\n", name->name);
 146         dir_attr.valid = 0;
 147         fattr->valid = 0;
 148         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_LOOKUP, &arg, &res, 0);
 149         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR))
 150                 status = rpc_call(NFS_CLIENT(dir), NFS3PROC_GETATTR,
 151                          fhandle, fattr, 0);
 152         dprintk("NFS reply lookup: %d\n", status);
 153         if (status >= 0)
 154                 status = nfs_refresh_inode(dir, &dir_attr);
 155         return status;
 156 }
 157
 158 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 159 {
 160         struct nfs_fattr        fattr;
 161         struct nfs3_accessargs  arg = {
 162                 .fh             = NFS_FH(inode),
 163         };
 164         struct nfs3_accessres   res = {
 165                 .fattr          = &fattr,
 166         };
 167         struct rpc_message msg = {
 168                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 169                 .rpc_argp       = &arg,
 170                 .rpc_resp       = &res,
 171                 .rpc_cred       = entry->cred
 172         };
 173         int mode = entry->mask;
 174         int status;
 175
 176         dprintk("NFS call  access\n");
 177         fattr.valid = 0;
 178
 179         if (mode & MAY_READ)
 180                 arg.access |= NFS3_ACCESS_READ;
 181         if (S_ISDIR(inode->i_mode)) {
 182                 if (mode & MAY_WRITE)
 183                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 184                 if (mode & MAY_EXEC)
 185                         arg.access |= NFS3_ACCESS_LOOKUP;
 186         } else {
 187                 if (mode & MAY_WRITE)
 188                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 189                 if (mode & MAY_EXEC)
 190                         arg.access |= NFS3_ACCESS_EXECUTE;
 191         }
 192         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 193         nfs_refresh_inode(inode, &fattr);
 194         if (status == 0) {
 195                 entry->mask = 0;
 196                 if (res.access & NFS3_ACCESS_READ)
 197                         entry->mask |= MAY_READ;
 198                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 199                         entry->mask |= MAY_WRITE;
 200                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 201                         entry->mask |= MAY_EXEC;
 202         }
 203         dprintk("NFS reply access: %d\n", status);
 204         return status;
 205 }
 206
 207 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 208                 unsigned int pgbase, unsigned int pglen)
 209 {
 210         struct nfs_fattr        fattr;
 211         struct nfs3_readlinkargs args = {
 212                 .fh             = NFS_FH(inode),
 213                 .pgbase         = pgbase,
 214                 .pglen          = pglen,
 215                 .pages          = &page
 216         };
 217         int                     status;
 218
 219         dprintk("NFS call  readlink\n");
 220         fattr.valid = 0;
 221         status = rpc_call(NFS_CLIENT(inode), NFS3PROC_READLINK,
 222                           &args, &fattr, 0);
 223         nfs_refresh_inode(inode, &fattr);
 224         dprintk("NFS reply readlink: %d\n", status);
 225         return status;
 226 }
 227
 228 static int nfs3_proc_read(struct nfs_read_data *rdata)
 229 {
 230         int                     flags = rdata->flags;
 231         struct inode *          inode = rdata->inode;
 232         struct nfs_fattr *      fattr = rdata->res.fattr;
 233         struct rpc_message      msg = {
 234                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
 235                 .rpc_argp       = &rdata->args,
 236                 .rpc_resp       = &rdata->res,
 237                 .rpc_cred       = rdata->cred,
 238         };
 239         int                     status;
 240
 241         dprintk("NFS call  read %d @ %Ld\n", rdata->args.count,
 242                         (long long) rdata->args.offset);
 243         fattr->valid = 0;
 244         status = rpc_call_sync(NFS_CLIENT(inode), &msg, flags);
 245         if (status >= 0)
 246                 nfs_refresh_inode(inode, fattr);
 247         dprintk("NFS reply read: %d\n", status);
 248         return status;
 249 }
 250
 251 static int nfs3_proc_write(struct nfs_write_data *wdata)
 252 {
 253         int                     rpcflags = wdata->flags;
 254         struct inode *          inode = wdata->inode;
 255         struct nfs_fattr *      fattr = wdata->res.fattr;
 256         struct rpc_message      msg = {
 257                 .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
 258                 .rpc_argp       = &wdata->args,
 259                 .rpc_resp       = &wdata->res,
 260                 .rpc_cred       = wdata->cred,
 261         };
 262         int                     status;
 263
 264         dprintk("NFS call  write %d @ %Ld\n", wdata->args.count,
 265                         (long long) wdata->args.offset);
 266         fattr->valid = 0;
 267         status = rpc_call_sync(NFS_CLIENT(inode), &msg, rpcflags);
 268         if (status >= 0)
 269                 nfs_refresh_inode(inode, fattr);
 270         dprintk("NFS reply write: %d\n", status);
 271         return status < 0? status : wdata->res.count;
 272 }
 273
 274 static int nfs3_proc_commit(struct nfs_write_data *cdata)
 275 {
 276         struct inode *          inode = cdata->inode;
 277         struct nfs_fattr *      fattr = cdata->res.fattr;
 278         struct rpc_message      msg = {
 279                 .rpc_proc       = &nfs3_procedures[NFS3PROC_COMMIT],
 280                 .rpc_argp       = &cdata->args,
 281                 .rpc_resp       = &cdata->res,
 282                 .rpc_cred       = cdata->cred,
 283         };
 284         int                     status;
 285
 286         dprintk("NFS call  commit %d @ %Ld\n", cdata->args.count,
 287                         (long long) cdata->args.offset);
 288         fattr->valid = 0;
 289         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 290         if (status >= 0)
 291                 nfs_refresh_inode(inode, fattr);
 292         dprintk("NFS reply commit: %d\n", status);
 293         return status;
 294 }
 295
 296 /*
 297  * Create a regular file.
 298  * For now, we don't implement O_EXCL.
 299  */
 300 static int
 301 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 302                  int flags, struct nameidata *nd)
 303 {
 304         struct nfs_fh           fhandle;
 305         struct nfs_fattr        fattr;
 306         struct nfs_fattr        dir_attr;
 307         struct nfs3_createargs  arg = {
 308                 .fh             = NFS_FH(dir),
 309                 .name           = dentry->d_name.name,
 310                 .len            = dentry->d_name.len,
 311                 .sattr          = sattr,
 312         };
 313         struct nfs3_diropres    res = {
 314                 .dir_attr       = &dir_attr,
 315                 .fh             = &fhandle,
 316                 .fattr          = &fattr
 317         };
 318         mode_t mode = sattr->ia_mode;
 319         int status;
 320
 321         dprintk("NFS call  create %s\n", dentry->d_name.name);
 322         arg.createmode = NFS3_CREATE_UNCHECKED;
 323         if (flags & O_EXCL) {
 324                 arg.createmode  = NFS3_CREATE_EXCLUSIVE;
 325                 arg.verifier[0] = jiffies;
 326                 arg.verifier[1] = current->pid;
 327         }
 328
 329         sattr->ia_mode &= ~current->fs->umask;
 330
 331 again:
 332         dir_attr.valid = 0;
 333         fattr.valid = 0;
 334         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_CREATE, &arg, &res, 0);
 335         nfs_refresh_inode(dir, &dir_attr);
 336
 337         /* If the server doesn't support the exclusive creation semantics,
 338          * try again with simple 'guarded' mode. */
 339         if (status == NFSERR_NOTSUPP) {
 340                 switch (arg.createmode) {
 341                         case NFS3_CREATE_EXCLUSIVE:
 342                                 arg.createmode = NFS3_CREATE_GUARDED;
 343                                 break;
 344
 345                         case NFS3_CREATE_GUARDED:
 346                                 arg.createmode = NFS3_CREATE_UNCHECKED;
 347                                 break;
 348
 349                         case NFS3_CREATE_UNCHECKED:
 350                                 goto out;
 351                 }
 352                 goto again;
 353         }
 354
 355         if (status == 0)
 356                 status = nfs_instantiate(dentry, &fhandle, &fattr);
 357         if (status != 0)
 358                 goto out;
 359
 360         /* When we created the file with exclusive semantics, make
 361          * sure we set the attributes afterwards. */
 362         if (arg.createmode == NFS3_CREATE_EXCLUSIVE) {
 363                 dprintk("NFS call  setattr (post-create)\n");
 364
 365                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 366                         sattr->ia_valid |= ATTR_ATIME;
 367                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 368                         sattr->ia_valid |= ATTR_MTIME;
 369
 370                 /* Note: we could use a guarded setattr here, but I'm
 371                  * not sure this buys us anything (and I'd have
 372                  * to revamp the NFSv3 XDR code) */
 373                 status = nfs3_proc_setattr(dentry, &fattr, sattr);
 374                 if (status == 0)
 375                         nfs_setattr_update_inode(dentry->d_inode, sattr);
 376                 nfs_refresh_inode(dentry->d_inode, &fattr);
 377                 dprintk("NFS reply setattr (post-create): %d\n", status);
 378         }
 379         if (status != 0)
 380                 goto out;
 381         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 382 out:
 383         dprintk("NFS reply create: %d\n", status);
 384         return status;
 385 }
 386
 387 static int
 388 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 389 {
 390         struct nfs_fattr        dir_attr;
 391         struct nfs3_diropargs   arg = {
 392                 .fh             = NFS_FH(dir),
 393                 .name           = name->name,
 394                 .len            = name->len
 395         };
 396         struct rpc_message      msg = {
 397                 .rpc_proc       = &nfs3_procedures[NFS3PROC_REMOVE],
 398                 .rpc_argp       = &arg,
 399                 .rpc_resp       = &dir_attr,
 400         };
 401         int                     status;
 402
 403         dprintk("NFS call  remove %s\n", name->name);
 404         dir_attr.valid = 0;
 405         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 406         nfs_refresh_inode(dir, &dir_attr);
 407         dprintk("NFS reply remove: %d\n", status);
 408         return status;
 409 }
 410
 411 static int
 412 nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, struct qstr *name)
 413 {
 414         struct unlinkxdr {
 415                 struct nfs3_diropargs arg;
 416                 struct nfs_fattr res;
 417         } *ptr;
 418
 419         ptr = (struct unlinkxdr *)kmalloc(sizeof(*ptr), GFP_KERNEL);
 420         if (!ptr)
 421                 return -ENOMEM;
 422         ptr->arg.fh = NFS_FH(dir->d_inode);
 423         ptr->arg.name = name->name;
 424         ptr->arg.len = name->len;
 425         ptr->res.valid = 0;
 426         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 427         msg->rpc_argp = &ptr->arg;
 428         msg->rpc_resp = &ptr->res;
 429         return 0;
 430 }
 431
 432 static int
 433 nfs3_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
 434 {
 435         struct rpc_message *msg = &task->tk_msg;
 436         struct nfs_fattr        *dir_attr;
 437
 438         if (nfs3_async_handle_jukebox(task))
 439                 return 1;
 440         if (msg->rpc_argp) {
 441                 dir_attr = (struct nfs_fattr*)msg->rpc_resp;
 442                 nfs_refresh_inode(dir->d_inode, dir_attr);
 443                 kfree(msg->rpc_argp);
 444         }
 445         return 0;
 446 }
 447
 448 static int
 449 nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
 450                  struct inode *new_dir, struct qstr *new_name)
 451 {
 452         struct nfs_fattr        old_dir_attr, new_dir_attr;
 453         struct nfs3_renameargs  arg = {
 454                 .fromfh         = NFS_FH(old_dir),
 455                 .fromname       = old_name->name,
 456                 .fromlen        = old_name->len,
 457                 .tofh           = NFS_FH(new_dir),
 458                 .toname         = new_name->name,
 459                 .tolen          = new_name->len
 460         };
 461         struct nfs3_renameres   res = {
 462                 .fromattr       = &old_dir_attr,
 463                 .toattr         = &new_dir_attr
 464         };
 465         int                     status;
 466
 467         dprintk("NFS call  rename %s -> %s\n", old_name->name, new_name->name);
 468         old_dir_attr.valid = 0;
 469         new_dir_attr.valid = 0;
 470         status = rpc_call(NFS_CLIENT(old_dir), NFS3PROC_RENAME, &arg, &res, 0);
 471         nfs_refresh_inode(old_dir, &old_dir_attr);
 472         nfs_refresh_inode(new_dir, &new_dir_attr);
 473         dprintk("NFS reply rename: %d\n", status);
 474         return status;
 475 }
 476
 477 static int
 478 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 479 {
 480         struct nfs_fattr        dir_attr, fattr;
 481         struct nfs3_linkargs    arg = {
 482                 .fromfh         = NFS_FH(inode),
 483                 .tofh           = NFS_FH(dir),
 484                 .toname         = name->name,
 485                 .tolen          = name->len
 486         };
 487         struct nfs3_linkres     res = {
 488                 .dir_attr       = &dir_attr,
 489                 .fattr          = &fattr
 490         };
 491         int                     status;
 492
 493         dprintk("NFS call  link %s\n", name->name);
 494         dir_attr.valid = 0;
 495         fattr.valid = 0;
 496         status = rpc_call(NFS_CLIENT(inode), NFS3PROC_LINK, &arg, &res, 0);
 497         nfs_refresh_inode(dir, &dir_attr);
 498         nfs_refresh_inode(inode, &fattr);
 499         dprintk("NFS reply link: %d\n", status);
 500         return status;
 501 }
 502
 503 static int
 504 nfs3_proc_symlink(struct inode *dir, struct qstr *name, struct qstr *path,
 505                   struct iattr *sattr, struct nfs_fh *fhandle,
 506                   struct nfs_fattr *fattr)
 507 {
 508         struct nfs_fattr        dir_attr;
 509         struct nfs3_symlinkargs arg = {
 510                 .fromfh         = NFS_FH(dir),
 511                 .fromname       = name->name,
 512                 .fromlen        = name->len,
 513                 .topath         = path->name,
 514                 .tolen          = path->len,
 515                 .sattr          = sattr
 516         };
 517         struct nfs3_diropres    res = {
 518                 .dir_attr       = &dir_attr,
 519                 .fh             = fhandle,
 520                 .fattr          = fattr
 521         };
 522         int                     status;
 523
 524         if (path->len > NFS3_MAXPATHLEN)
 525                 return -ENAMETOOLONG;
 526         dprintk("NFS call  symlink %s -> %s\n", name->name, path->name);
 527         dir_attr.valid = 0;
 528         fattr->valid = 0;
 529         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_SYMLINK, &arg, &res, 0);
 530         nfs_refresh_inode(dir, &dir_attr);
 531         dprintk("NFS reply symlink: %d\n", status);
 532         return status;
 533 }
 534
 535 static int
 536 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 537 {
 538         struct nfs_fh fhandle;
 539         struct nfs_fattr fattr, dir_attr;
 540         struct nfs3_mkdirargs   arg = {
 541                 .fh             = NFS_FH(dir),
 542                 .name           = dentry->d_name.name,
 543                 .len            = dentry->d_name.len,
 544                 .sattr          = sattr
 545         };
 546         struct nfs3_diropres    res = {
 547                 .dir_attr       = &dir_attr,
 548                 .fh             = &fhandle,
 549                 .fattr          = &fattr
 550         };
 551         int mode = sattr->ia_mode;
 552         int status;
 553
 554         dprintk("NFS call  mkdir %s\n", dentry->d_name.name);
 555         dir_attr.valid = 0;
 556         fattr.valid = 0;
 557
 558         sattr->ia_mode &= ~current->fs->umask;
 559
 560         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKDIR, &arg, &res, 0);
 561         nfs_refresh_inode(dir, &dir_attr);
 562         if (status != 0)
 563                 goto out;
 564         status = nfs_instantiate(dentry, &fhandle, &fattr);
 565         if (status != 0)
 566                 goto out;
 567         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 568 out:
 569         dprintk("NFS reply mkdir: %d\n", status);
 570         return status;
 571 }
 572
 573 static int
 574 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 575 {
 576         struct nfs_fattr        dir_attr;
 577         struct nfs3_diropargs   arg = {
 578                 .fh             = NFS_FH(dir),
 579                 .name           = name->name,
 580                 .len            = name->len
 581         };
 582         int                     status;
 583
 584         dprintk("NFS call  rmdir %s\n", name->name);
 585         dir_attr.valid = 0;
 586         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_RMDIR, &arg, &dir_attr, 0);
 587         nfs_refresh_inode(dir, &dir_attr);
 588         dprintk("NFS reply rmdir: %d\n", status);
 589         return status;
 590 }
 591
 592 /*
 593  * The READDIR implementation is somewhat hackish - we pass the user buffer
 594  * to the encode function, which installs it in the receive iovec.
 595  * The decode function itself doesn't perform any decoding, it just makes
 596  * sure the reply is syntactically correct.
 597  *
 598  * Also note that this implementation handles both plain readdir and
 599  * readdirplus.
 600  */
 601 static int
 602 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 603                   u64 cookie, struct page *page, unsigned int count, int plus)
 604 {
 605         struct inode            *dir = dentry->d_inode;
 606         struct nfs_fattr        dir_attr;
 607         u32                     *verf = NFS_COOKIEVERF(dir);
 608         struct nfs3_readdirargs arg = {
 609                 .fh             = NFS_FH(dir),
 610                 .cookie         = cookie,
 611                 .verf           = {verf[0], verf[1]},
 612                 .plus           = plus,
 613                 .count          = count,
 614                 .pages          = &page
 615         };
 616         struct nfs3_readdirres  res = {
 617                 .dir_attr       = &dir_attr,
 618                 .verf           = verf,
 619                 .plus           = plus
 620         };
 621         struct rpc_message      msg = {
 622                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 623                 .rpc_argp       = &arg,
 624                 .rpc_resp       = &res,
 625                 .rpc_cred       = cred
 626         };
 627         int                     status;
 628
 629         lock_kernel();
 630
 631         if (plus)
 632                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 633
 634         dprintk("NFS call  readdir%s %d\n",
 635                         plus? "plus" : "", (unsigned int) cookie);
 636
 637         dir_attr.valid = 0;
 638         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 639         nfs_refresh_inode(dir, &dir_attr);
 640         dprintk("NFS reply readdir: %d\n", status);
 641         unlock_kernel();
 642         return status;
 643 }
 644
 645 static int
 646 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 647                 dev_t rdev)
 648 {
 649         struct nfs_fh fh;
 650         struct nfs_fattr fattr, dir_attr;
 651         struct nfs3_mknodargs   arg = {
 652                 .fh             = NFS_FH(dir),
 653                 .name           = dentry->d_name.name,
 654                 .len            = dentry->d_name.len,
 655                 .sattr          = sattr,
 656                 .rdev           = rdev
 657         };
 658         struct nfs3_diropres    res = {
 659                 .dir_attr       = &dir_attr,
 660                 .fh             = &fh,
 661                 .fattr          = &fattr
 662         };
 663         mode_t mode = sattr->ia_mode;
 664         int status;
 665
 666         switch (sattr->ia_mode & S_IFMT) {
 667         case S_IFBLK:   arg.type = NF3BLK;  break;
 668         case S_IFCHR:   arg.type = NF3CHR;  break;
 669         case S_IFIFO:   arg.type = NF3FIFO; break;
 670         case S_IFSOCK:  arg.type = NF3SOCK; break;
 671         default:        return -EINVAL;
 672         }
 673
 674         dprintk("NFS call  mknod %s %u:%u\n", dentry->d_name.name,
 675                         MAJOR(rdev), MINOR(rdev));
 676
 677         sattr->ia_mode &= ~current->fs->umask;
 678
 679         dir_attr.valid = 0;
 680         fattr.valid = 0;
 681         status = rpc_call(NFS_CLIENT(dir), NFS3PROC_MKNOD, &arg, &res, 0);
 682         nfs_refresh_inode(dir, &dir_attr);
 683         if (status != 0)
 684                 goto out;
 685         status = nfs_instantiate(dentry, &fh, &fattr);
 686         if (status != 0)
 687                 goto out;
 688         status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
 689 out:
 690         dprintk("NFS reply mknod: %d\n", status);
 691         return status;
 692 }
 693
 694 static int
 695 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 696                  struct nfs_fsstat *stat)
 697 {
 698         int     status;
 699
 700         dprintk("NFS call  fsstat\n");
 701         stat->fattr->valid = 0;
 702         status = rpc_call(server->client, NFS3PROC_FSSTAT, fhandle, stat, 0);
 703         dprintk("NFS reply statfs: %d\n", status);
 704         return status;
 705 }
 706
 707 static int
 708 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 709                  struct nfs_fsinfo *info)
 710 {
 711         int     status;
 712
 713         dprintk("NFS call  fsinfo\n");
 714         info->fattr->valid = 0;
 715         status = rpc_call(server->client_sys, NFS3PROC_FSINFO, fhandle, info, 0);
 716         dprintk("NFS reply fsinfo: %d\n", status);
 717         return status;
 718 }
 719
 720 static int
 721 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 722                    struct nfs_pathconf *info)
 723 {
 724         int     status;
 725
 726         dprintk("NFS call  pathconf\n");
 727         info->fattr->valid = 0;
 728         status = rpc_call(server->client, NFS3PROC_PATHCONF, fhandle, info, 0);
 729         dprintk("NFS reply pathconf: %d\n", status);
 730         return status;
 731 }
 732
 733 extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
 734
 735 static void
 736 nfs3_read_done(struct rpc_task *task)
 737 {
 738         struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
 739
 740         if (nfs3_async_handle_jukebox(task))
 741                 return;
 742         /* Call back common NFS readpage processing */
 743         if (task->tk_status >= 0)
 744                 nfs_refresh_inode(data->inode, &data->fattr);
 745         nfs_readpage_result(task);
 746 }
 747
 748 static void
 749 nfs3_proc_read_setup(struct nfs_read_data *data)
 750 {
 751         struct rpc_task         *task = &data->task;
 752         struct inode            *inode = data->inode;
 753         int                     flags;
 754         struct rpc_message      msg = {
 755                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
 756                 .rpc_argp       = &data->args,
 757                 .rpc_resp       = &data->res,
 758                 .rpc_cred       = data->cred,
 759         };
 760
 761         /* N.B. Do we need to test? Never called for swapfile inode */
 762         flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
 763
 764         /* Finalize the task. */
 765         rpc_init_task(task, NFS_CLIENT(inode), nfs3_read_done, flags);
 766         rpc_call_setup(task, &msg, 0);
 767 }
 768
 769 static void
 770 nfs3_write_done(struct rpc_task *task)
 771 {
 772         struct nfs_write_data *data;
 773
 774         if (nfs3_async_handle_jukebox(task))
 775                 return;
 776         data = (struct nfs_write_data *)task->tk_calldata;
 777         if (task->tk_status >= 0)
 778                 nfs_refresh_inode(data->inode, data->res.fattr);
 779         nfs_writeback_done(task);
 780 }
 781
 782 static void
 783 nfs3_proc_write_setup(struct nfs_write_data *data, int how)
 784 {
 785         struct rpc_task         *task = &data->task;
 786         struct inode            *inode = data->inode;
 787         int                     stable;
 788         int                     flags;
 789         struct rpc_message      msg = {
 790                 .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
 791                 .rpc_argp       = &data->args,
 792                 .rpc_resp       = &data->res,
 793                 .rpc_cred       = data->cred,
 794         };
 795
 796         if (how & FLUSH_STABLE) {
 797                 if (!NFS_I(inode)->ncommit)
 798                         stable = NFS_FILE_SYNC;
 799                 else
 800                         stable = NFS_DATA_SYNC;
 801         } else
 802                 stable = NFS_UNSTABLE;
 803         data->args.stable = stable;
 804
 805         /* Set the initial flags for the task.  */
 806         flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 807
 808         /* Finalize the task. */
 809         rpc_init_task(task, NFS_CLIENT(inode), nfs3_write_done, flags);
 810         rpc_call_setup(task, &msg, 0);
 811 }
 812
 813 static void
 814 nfs3_commit_done(struct rpc_task *task)
 815 {
 816         struct nfs_write_data *data;
 817
 818         if (nfs3_async_handle_jukebox(task))
 819                 return;
 820         data = (struct nfs_write_data *)task->tk_calldata;
 821         if (task->tk_status >= 0)
 822                 nfs_refresh_inode(data->inode, data->res.fattr);
 823         nfs_commit_done(task);
 824 }
 825
 826 static void
 827 nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
 828 {
 829         struct rpc_task         *task = &data->task;
 830         struct inode            *inode = data->inode;
 831         int                     flags;
 832         struct rpc_message      msg = {
 833                 .rpc_proc       = &nfs3_procedures[NFS3PROC_COMMIT],
 834                 .rpc_argp       = &data->args,
 835                 .rpc_resp       = &data->res,
 836                 .rpc_cred       = data->cred,
 837         };
 838
 839         /* Set the initial flags for the task.  */
 840         flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
 841
 842         /* Finalize the task. */
 843         rpc_init_task(task, NFS_CLIENT(inode), nfs3_commit_done, flags);
 844         rpc_call_setup(task, &msg, 0);
 845 }
 846
 847 static int
 848 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 849 {
 850         return nlmclnt_proc(filp->f_dentry->d_inode, cmd, fl);
 851 }
 852
 853 struct nfs_rpc_ops      nfs_v3_clientops = {
 854         .version        = 3,                    /* protocol version */
 855         .dentry_ops     = &nfs_dentry_operations,
 856         .dir_inode_ops  = &nfs3_dir_inode_operations,
 857         .file_inode_ops = &nfs3_file_inode_operations,
 858         .getroot        = nfs3_proc_get_root,
 859         .getattr        = nfs3_proc_getattr,
 860         .setattr        = nfs3_proc_setattr,
 861         .lookup         = nfs3_proc_lookup,
 862         .access         = nfs3_proc_access,
 863         .readlink       = nfs3_proc_readlink,
 864         .read           = nfs3_proc_read,
 865         .write          = nfs3_proc_write,
 866         .commit         = nfs3_proc_commit,
 867         .create         = nfs3_proc_create,
 868         .remove         = nfs3_proc_remove,
 869         .unlink_setup   = nfs3_proc_unlink_setup,
 870         .unlink_done    = nfs3_proc_unlink_done,
 871         .rename         = nfs3_proc_rename,
 872         .link           = nfs3_proc_link,
 873         .symlink        = nfs3_proc_symlink,
 874         .mkdir          = nfs3_proc_mkdir,
 875         .rmdir          = nfs3_proc_rmdir,
 876         .readdir        = nfs3_proc_readdir,
 877         .mknod          = nfs3_proc_mknod,
 878         .statfs         = nfs3_proc_statfs,
 879         .fsinfo         = nfs3_proc_fsinfo,
 880         .pathconf       = nfs3_proc_pathconf,
 881         .decode_dirent  = nfs3_decode_dirent,
 882         .read_setup     = nfs3_proc_read_setup,
 883         .write_setup    = nfs3_proc_write_setup,
 884         .commit_setup   = nfs3_proc_commit_setup,
 885         .file_open      = nfs_open,
 886         .file_release   = nfs_release,
 887         .lock           = nfs3_proc_lock,
 888         .clear_acl_cache = nfs3_forget_cached_acls,
 889 };