fs/nfs/nfs3proc.c

   1 /*
   2  *  linux/fs/nfs/nfs3proc.c
   3  *
   4  *  Client-side NFSv3 procedures stubs.
   5  *
   6  *  Copyright (C) 1997, Olaf Kirch
   7  */
   8
   9 #include <linux/mm.h>
  10 #include <linux/errno.h>
  11 #include <linux/string.h>
  12 #include <linux/sunrpc/clnt.h>
  13 #include <linux/slab.h>
  14 #include <linux/nfs.h>
  15 #include <linux/nfs3.h>
  16 #include <linux/nfs_fs.h>
  17 #include <linux/nfs_page.h>
  18 #include <linux/lockd/bind.h>
  19 #include <linux/nfs_mount.h>
  20 #include <linux/freezer.h>
  21 #include <linux/xattr.h>
  22
  23 #include "iostat.h"
  24 #include "internal.h"
  25 #include "nfs3_fs.h"
  26
  27 #define NFSDBG_FACILITY         NFSDBG_PROC
  28
  29 /* A wrapper to handle the EJUKEBOX error messages */
  30 static int
  31 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
  32 {
  33         int res;
  34         do {
  35                 res = rpc_call_sync(clnt, msg, flags);
  36                 if (res != -EJUKEBOX)
  37                         break;
  38                 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
  39                 res = -ERESTARTSYS;
  40         } while (!fatal_signal_pending(current));
  41         return res;
  42 }
  43
  44 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
  45
  46 static int
  47 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
  48 {
  49         if (task->tk_status != -EJUKEBOX)
  50                 return 0;
  51         if (task->tk_status == -EJUKEBOX)
  52                 nfs_inc_stats(inode, NFSIOS_DELAY);
  53         task->tk_status = 0;
  54         rpc_restart_call(task);
  55         rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
  56         return 1;
  57 }
  58
  59 static int
  60 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
  61                  struct nfs_fsinfo *info)
  62 {
  63         struct rpc_message msg = {
  64                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
  65                 .rpc_argp       = fhandle,
  66                 .rpc_resp       = info,
  67         };
  68         int     status;
  69
  70         dprintk("%s: call  fsinfo\n", __func__);
  71         nfs_fattr_init(info->fattr);
  72         status = rpc_call_sync(client, &msg, 0);
  73         dprintk("%s: reply fsinfo: %d\n", __func__, status);
  74         if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
  75                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
  76                 msg.rpc_resp = info->fattr;
  77                 status = rpc_call_sync(client, &msg, 0);
  78                 dprintk("%s: reply getattr: %d\n", __func__, status);
  79         }
  80         return status;
  81 }
  82
  83 /*
  84  * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
  85  */
  86 static int
  87 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  88                    struct nfs_fsinfo *info)
  89 {
  90         int     status;
  91
  92         status = do_proc_get_root(server->client, fhandle, info);
  93         if (status && server->nfs_client->cl_rpcclient != server->client)
  94                 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
  95         return status;
  96 }
  97
  98 /*
  99  * One function for each procedure in the NFS protocol.
 100  */
 101 static int
 102 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 103                 struct nfs_fattr *fattr, struct nfs4_label *label)
 104 {
 105         struct rpc_message msg = {
 106                 .rpc_proc       = &nfs3_procedures[NFS3PROC_GETATTR],
 107                 .rpc_argp       = fhandle,
 108                 .rpc_resp       = fattr,
 109         };
 110         int     status;
 111
 112         dprintk("NFS call  getattr\n");
 113         nfs_fattr_init(fattr);
 114         status = rpc_call_sync(server->client, &msg, 0);
 115         dprintk("NFS reply getattr: %d\n", status);
 116         return status;
 117 }
 118
 119 static int
 120 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 121                         struct iattr *sattr)
 122 {
 123         struct inode *inode = d_inode(dentry);
 124         struct nfs3_sattrargs   arg = {
 125                 .fh             = NFS_FH(inode),
 126                 .sattr          = sattr,
 127         };
 128         struct rpc_message msg = {
 129                 .rpc_proc       = &nfs3_procedures[NFS3PROC_SETATTR],
 130                 .rpc_argp       = &arg,
 131                 .rpc_resp       = fattr,
 132         };
 133         int     status;
 134
 135         dprintk("NFS call  setattr\n");
 136         if (sattr->ia_valid & ATTR_FILE)
 137                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 138         nfs_fattr_init(fattr);
 139         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 140         if (status == 0)
 141                 nfs_setattr_update_inode(inode, sattr, fattr);
 142         dprintk("NFS reply setattr: %d\n", status);
 143         return status;
 144 }
 145
 146 static int
 147 nfs3_proc_lookup(struct inode *dir, struct qstr *name,
 148                  struct nfs_fh *fhandle, struct nfs_fattr *fattr,
 149                  struct nfs4_label *label)
 150 {
 151         struct nfs3_diropargs   arg = {
 152                 .fh             = NFS_FH(dir),
 153                 .name           = name->name,
 154                 .len            = name->len
 155         };
 156         struct nfs3_diropres    res = {
 157                 .fh             = fhandle,
 158                 .fattr          = fattr
 159         };
 160         struct rpc_message msg = {
 161                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LOOKUP],
 162                 .rpc_argp       = &arg,
 163                 .rpc_resp       = &res,
 164         };
 165         int                     status;
 166
 167         dprintk("NFS call  lookup %s\n", name->name);
 168         res.dir_attr = nfs_alloc_fattr();
 169         if (res.dir_attr == NULL)
 170                 return -ENOMEM;
 171
 172         nfs_fattr_init(fattr);
 173         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 174         nfs_refresh_inode(dir, res.dir_attr);
 175         if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
 176                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
 177                 msg.rpc_argp = fhandle;
 178                 msg.rpc_resp = fattr;
 179                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 180         }
 181         nfs_free_fattr(res.dir_attr);
 182         dprintk("NFS reply lookup: %d\n", status);
 183         return status;
 184 }
 185
 186 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 187 {
 188         struct nfs3_accessargs  arg = {
 189                 .fh             = NFS_FH(inode),
 190         };
 191         struct nfs3_accessres   res;
 192         struct rpc_message msg = {
 193                 .rpc_proc       = &nfs3_procedures[NFS3PROC_ACCESS],
 194                 .rpc_argp       = &arg,
 195                 .rpc_resp       = &res,
 196                 .rpc_cred       = entry->cred,
 197         };
 198         int mode = entry->mask;
 199         int status = -ENOMEM;
 200
 201         dprintk("NFS call  access\n");
 202
 203         if (mode & MAY_READ)
 204                 arg.access |= NFS3_ACCESS_READ;
 205         if (S_ISDIR(inode->i_mode)) {
 206                 if (mode & MAY_WRITE)
 207                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
 208                 if (mode & MAY_EXEC)
 209                         arg.access |= NFS3_ACCESS_LOOKUP;
 210         } else {
 211                 if (mode & MAY_WRITE)
 212                         arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
 213                 if (mode & MAY_EXEC)
 214                         arg.access |= NFS3_ACCESS_EXECUTE;
 215         }
 216
 217         res.fattr = nfs_alloc_fattr();
 218         if (res.fattr == NULL)
 219                 goto out;
 220
 221         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 222         nfs_refresh_inode(inode, res.fattr);
 223         if (status == 0) {
 224                 entry->mask = 0;
 225                 if (res.access & NFS3_ACCESS_READ)
 226                         entry->mask |= MAY_READ;
 227                 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
 228                         entry->mask |= MAY_WRITE;
 229                 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
 230                         entry->mask |= MAY_EXEC;
 231         }
 232         nfs_free_fattr(res.fattr);
 233 out:
 234         dprintk("NFS reply access: %d\n", status);
 235         return status;
 236 }
 237
 238 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 239                 unsigned int pgbase, unsigned int pglen)
 240 {
 241         struct nfs_fattr        *fattr;
 242         struct nfs3_readlinkargs args = {
 243                 .fh             = NFS_FH(inode),
 244                 .pgbase         = pgbase,
 245                 .pglen          = pglen,
 246                 .pages          = &page
 247         };
 248         struct rpc_message msg = {
 249                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 250                 .rpc_argp       = &args,
 251         };
 252         int status = -ENOMEM;
 253
 254         dprintk("NFS call  readlink\n");
 255         fattr = nfs_alloc_fattr();
 256         if (fattr == NULL)
 257                 goto out;
 258         msg.rpc_resp = fattr;
 259
 260         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 261         nfs_refresh_inode(inode, fattr);
 262         nfs_free_fattr(fattr);
 263 out:
 264         dprintk("NFS reply readlink: %d\n", status);
 265         return status;
 266 }
 267
 268 struct nfs3_createdata {
 269         struct rpc_message msg;
 270         union {
 271                 struct nfs3_createargs create;
 272                 struct nfs3_mkdirargs mkdir;
 273                 struct nfs3_symlinkargs symlink;
 274                 struct nfs3_mknodargs mknod;
 275         } arg;
 276         struct nfs3_diropres res;
 277         struct nfs_fh fh;
 278         struct nfs_fattr fattr;
 279         struct nfs_fattr dir_attr;
 280 };
 281
 282 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 283 {
 284         struct nfs3_createdata *data;
 285
 286         data = kzalloc(sizeof(*data), GFP_KERNEL);
 287         if (data != NULL) {
 288                 data->msg.rpc_argp = &data->arg;
 289                 data->msg.rpc_resp = &data->res;
 290                 data->res.fh = &data->fh;
 291                 data->res.fattr = &data->fattr;
 292                 data->res.dir_attr = &data->dir_attr;
 293                 nfs_fattr_init(data->res.fattr);
 294                 nfs_fattr_init(data->res.dir_attr);
 295         }
 296         return data;
 297 }
 298
 299 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 300 {
 301         int status;
 302
 303         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 304         nfs_post_op_update_inode(dir, data->res.dir_attr);
 305         if (status == 0)
 306                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 307         return status;
 308 }
 309
 310 static void nfs3_free_createdata(struct nfs3_createdata *data)
 311 {
 312         kfree(data);
 313 }
 314
 315 /*
 316  * Create a regular file.
 317  */
 318 static int
 319 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 320                  int flags)
 321 {
 322         struct posix_acl *default_acl, *acl;
 323         struct nfs3_createdata *data;
 324         int status = -ENOMEM;
 325
 326         dprintk("NFS call  create %pd\n", dentry);
 327
 328         data = nfs3_alloc_createdata();
 329         if (data == NULL)
 330                 goto out;
 331
 332         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 333         data->arg.create.fh = NFS_FH(dir);
 334         data->arg.create.name = dentry->d_name.name;
 335         data->arg.create.len = dentry->d_name.len;
 336         data->arg.create.sattr = sattr;
 337
 338         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 339         if (flags & O_EXCL) {
 340                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 341                 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
 342                 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
 343         }
 344
 345         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 346         if (status)
 347                 goto out;
 348
 349         for (;;) {
 350                 status = nfs3_do_create(dir, dentry, data);
 351
 352                 if (status != -ENOTSUPP)
 353                         break;
 354                 /* If the server doesn't support the exclusive creation
 355                  * semantics, try again with simple 'guarded' mode. */
 356                 switch (data->arg.create.createmode) {
 357                         case NFS3_CREATE_EXCLUSIVE:
 358                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 359                                 break;
 360
 361                         case NFS3_CREATE_GUARDED:
 362                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 363                                 break;
 364
 365                         case NFS3_CREATE_UNCHECKED:
 366                                 goto out;
 367                 }
 368                 nfs_fattr_init(data->res.dir_attr);
 369                 nfs_fattr_init(data->res.fattr);
 370         }
 371
 372         if (status != 0)
 373                 goto out_release_acls;
 374
 375         /* When we created the file with exclusive semantics, make
 376          * sure we set the attributes afterwards. */
 377         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 378                 dprintk("NFS call  setattr (post-create)\n");
 379
 380                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 381                         sattr->ia_valid |= ATTR_ATIME;
 382                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 383                         sattr->ia_valid |= ATTR_MTIME;
 384
 385                 /* Note: we could use a guarded setattr here, but I'm
 386                  * not sure this buys us anything (and I'd have
 387                  * to revamp the NFSv3 XDR code) */
 388                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 389                 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
 390                 dprintk("NFS reply setattr (post-create): %d\n", status);
 391                 if (status != 0)
 392                         goto out_release_acls;
 393         }
 394
 395         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 396
 397 out_release_acls:
 398         posix_acl_release(acl);
 399         posix_acl_release(default_acl);
 400 out:
 401         nfs3_free_createdata(data);
 402         dprintk("NFS reply create: %d\n", status);
 403         return status;
 404 }
 405
 406 static int
 407 nfs3_proc_remove(struct inode *dir, struct qstr *name)
 408 {
 409         struct nfs_removeargs arg = {
 410                 .fh = NFS_FH(dir),
 411                 .name = *name,
 412         };
 413         struct nfs_removeres res;
 414         struct rpc_message msg = {
 415                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 416                 .rpc_argp = &arg,
 417                 .rpc_resp = &res,
 418         };
 419         int status = -ENOMEM;
 420
 421         dprintk("NFS call  remove %s\n", name->name);
 422         res.dir_attr = nfs_alloc_fattr();
 423         if (res.dir_attr == NULL)
 424                 goto out;
 425
 426         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 427         nfs_post_op_update_inode(dir, res.dir_attr);
 428         nfs_free_fattr(res.dir_attr);
 429 out:
 430         dprintk("NFS reply remove: %d\n", status);
 431         return status;
 432 }
 433
 434 static void
 435 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 436 {
 437         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 438 }
 439
 440 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 441 {
 442         rpc_call_start(task);
 443 }
 444
 445 static int
 446 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 447 {
 448         struct nfs_removeres *res;
 449         if (nfs3_async_handle_jukebox(task, dir))
 450                 return 0;
 451         res = task->tk_msg.rpc_resp;
 452         nfs_post_op_update_inode(dir, res->dir_attr);
 453         return 1;
 454 }
 455
 456 static void
 457 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 458 {
 459         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 460 }
 461
 462 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 463 {
 464         rpc_call_start(task);
 465 }
 466
 467 static int
 468 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 469                       struct inode *new_dir)
 470 {
 471         struct nfs_renameres *res;
 472
 473         if (nfs3_async_handle_jukebox(task, old_dir))
 474                 return 0;
 475         res = task->tk_msg.rpc_resp;
 476
 477         nfs_post_op_update_inode(old_dir, res->old_fattr);
 478         nfs_post_op_update_inode(new_dir, res->new_fattr);
 479         return 1;
 480 }
 481
 482 static int
 483 nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
 484 {
 485         struct nfs3_linkargs    arg = {
 486                 .fromfh         = NFS_FH(inode),
 487                 .tofh           = NFS_FH(dir),
 488                 .toname         = name->name,
 489                 .tolen          = name->len
 490         };
 491         struct nfs3_linkres     res;
 492         struct rpc_message msg = {
 493                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 494                 .rpc_argp       = &arg,
 495                 .rpc_resp       = &res,
 496         };
 497         int status = -ENOMEM;
 498
 499         dprintk("NFS call  link %s\n", name->name);
 500         res.fattr = nfs_alloc_fattr();
 501         res.dir_attr = nfs_alloc_fattr();
 502         if (res.fattr == NULL || res.dir_attr == NULL)
 503                 goto out;
 504
 505         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 506         nfs_post_op_update_inode(dir, res.dir_attr);
 507         nfs_post_op_update_inode(inode, res.fattr);
 508 out:
 509         nfs_free_fattr(res.dir_attr);
 510         nfs_free_fattr(res.fattr);
 511         dprintk("NFS reply link: %d\n", status);
 512         return status;
 513 }
 514
 515 static int
 516 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 517                   unsigned int len, struct iattr *sattr)
 518 {
 519         struct nfs3_createdata *data;
 520         int status = -ENOMEM;
 521
 522         if (len > NFS3_MAXPATHLEN)
 523                 return -ENAMETOOLONG;
 524
 525         dprintk("NFS call  symlink %pd\n", dentry);
 526
 527         data = nfs3_alloc_createdata();
 528         if (data == NULL)
 529                 goto out;
 530         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 531         data->arg.symlink.fromfh = NFS_FH(dir);
 532         data->arg.symlink.fromname = dentry->d_name.name;
 533         data->arg.symlink.fromlen = dentry->d_name.len;
 534         data->arg.symlink.pages = &page;
 535         data->arg.symlink.pathlen = len;
 536         data->arg.symlink.sattr = sattr;
 537
 538         status = nfs3_do_create(dir, dentry, data);
 539
 540         nfs3_free_createdata(data);
 541 out:
 542         dprintk("NFS reply symlink: %d\n", status);
 543         return status;
 544 }
 545
 546 static int
 547 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 548 {
 549         struct posix_acl *default_acl, *acl;
 550         struct nfs3_createdata *data;
 551         int status = -ENOMEM;
 552
 553         dprintk("NFS call  mkdir %pd\n", dentry);
 554
 555         data = nfs3_alloc_createdata();
 556         if (data == NULL)
 557                 goto out;
 558
 559         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 560         if (status)
 561                 goto out;
 562
 563         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 564         data->arg.mkdir.fh = NFS_FH(dir);
 565         data->arg.mkdir.name = dentry->d_name.name;
 566         data->arg.mkdir.len = dentry->d_name.len;
 567         data->arg.mkdir.sattr = sattr;
 568
 569         status = nfs3_do_create(dir, dentry, data);
 570         if (status != 0)
 571                 goto out_release_acls;
 572
 573         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 574
 575 out_release_acls:
 576         posix_acl_release(acl);
 577         posix_acl_release(default_acl);
 578 out:
 579         nfs3_free_createdata(data);
 580         dprintk("NFS reply mkdir: %d\n", status);
 581         return status;
 582 }
 583
 584 static int
 585 nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
 586 {
 587         struct nfs_fattr        *dir_attr;
 588         struct nfs3_diropargs   arg = {
 589                 .fh             = NFS_FH(dir),
 590                 .name           = name->name,
 591                 .len            = name->len
 592         };
 593         struct rpc_message msg = {
 594                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 595                 .rpc_argp       = &arg,
 596         };
 597         int status = -ENOMEM;
 598
 599         dprintk("NFS call  rmdir %s\n", name->name);
 600         dir_attr = nfs_alloc_fattr();
 601         if (dir_attr == NULL)
 602                 goto out;
 603
 604         msg.rpc_resp = dir_attr;
 605         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 606         nfs_post_op_update_inode(dir, dir_attr);
 607         nfs_free_fattr(dir_attr);
 608 out:
 609         dprintk("NFS reply rmdir: %d\n", status);
 610         return status;
 611 }
 612
 613 /*
 614  * The READDIR implementation is somewhat hackish - we pass the user buffer
 615  * to the encode function, which installs it in the receive iovec.
 616  * The decode function itself doesn't perform any decoding, it just makes
 617  * sure the reply is syntactically correct.
 618  *
 619  * Also note that this implementation handles both plain readdir and
 620  * readdirplus.
 621  */
 622 static int
 623 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 624                   u64 cookie, struct page **pages, unsigned int count, int plus)
 625 {
 626         struct inode            *dir = d_inode(dentry);
 627         __be32                  *verf = NFS_I(dir)->cookieverf;
 628         struct nfs3_readdirargs arg = {
 629                 .fh             = NFS_FH(dir),
 630                 .cookie         = cookie,
 631                 .verf           = {verf[0], verf[1]},
 632                 .plus           = plus,
 633                 .count          = count,
 634                 .pages          = pages
 635         };
 636         struct nfs3_readdirres  res = {
 637                 .verf           = verf,
 638                 .plus           = plus
 639         };
 640         struct rpc_message      msg = {
 641                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 642                 .rpc_argp       = &arg,
 643                 .rpc_resp       = &res,
 644                 .rpc_cred       = cred
 645         };
 646         int status = -ENOMEM;
 647
 648         if (plus)
 649                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 650
 651         dprintk("NFS call  readdir%s %d\n",
 652                         plus? "plus" : "", (unsigned int) cookie);
 653
 654         res.dir_attr = nfs_alloc_fattr();
 655         if (res.dir_attr == NULL)
 656                 goto out;
 657
 658         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 659
 660         nfs_invalidate_atime(dir);
 661         nfs_refresh_inode(dir, res.dir_attr);
 662
 663         nfs_free_fattr(res.dir_attr);
 664 out:
 665         dprintk("NFS reply readdir%s: %d\n",
 666                         plus? "plus" : "", status);
 667         return status;
 668 }
 669
 670 static int
 671 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 672                 dev_t rdev)
 673 {
 674         struct posix_acl *default_acl, *acl;
 675         struct nfs3_createdata *data;
 676         int status = -ENOMEM;
 677
 678         dprintk("NFS call  mknod %pd %u:%u\n", dentry,
 679                         MAJOR(rdev), MINOR(rdev));
 680
 681         data = nfs3_alloc_createdata();
 682         if (data == NULL)
 683                 goto out;
 684
 685         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 686         if (status)
 687                 goto out;
 688
 689         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 690         data->arg.mknod.fh = NFS_FH(dir);
 691         data->arg.mknod.name = dentry->d_name.name;
 692         data->arg.mknod.len = dentry->d_name.len;
 693         data->arg.mknod.sattr = sattr;
 694         data->arg.mknod.rdev = rdev;
 695
 696         switch (sattr->ia_mode & S_IFMT) {
 697         case S_IFBLK:
 698                 data->arg.mknod.type = NF3BLK;
 699                 break;
 700         case S_IFCHR:
 701                 data->arg.mknod.type = NF3CHR;
 702                 break;
 703         case S_IFIFO:
 704                 data->arg.mknod.type = NF3FIFO;
 705                 break;
 706         case S_IFSOCK:
 707                 data->arg.mknod.type = NF3SOCK;
 708                 break;
 709         default:
 710                 status = -EINVAL;
 711                 goto out;
 712         }
 713
 714         status = nfs3_do_create(dir, dentry, data);
 715         if (status != 0)
 716                 goto out_release_acls;
 717
 718         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 719
 720 out_release_acls:
 721         posix_acl_release(acl);
 722         posix_acl_release(default_acl);
 723 out:
 724         nfs3_free_createdata(data);
 725         dprintk("NFS reply mknod: %d\n", status);
 726         return status;
 727 }
 728
 729 static int
 730 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 731                  struct nfs_fsstat *stat)
 732 {
 733         struct rpc_message msg = {
 734                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 735                 .rpc_argp       = fhandle,
 736                 .rpc_resp       = stat,
 737         };
 738         int     status;
 739
 740         dprintk("NFS call  fsstat\n");
 741         nfs_fattr_init(stat->fattr);
 742         status = rpc_call_sync(server->client, &msg, 0);
 743         dprintk("NFS reply fsstat: %d\n", status);
 744         return status;
 745 }
 746
 747 static int
 748 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 749                  struct nfs_fsinfo *info)
 750 {
 751         struct rpc_message msg = {
 752                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 753                 .rpc_argp       = fhandle,
 754                 .rpc_resp       = info,
 755         };
 756         int     status;
 757
 758         dprintk("NFS call  fsinfo\n");
 759         nfs_fattr_init(info->fattr);
 760         status = rpc_call_sync(client, &msg, 0);
 761         dprintk("NFS reply fsinfo: %d\n", status);
 762         return status;
 763 }
 764
 765 /*
 766  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 767  * nfs_create_server
 768  */
 769 static int
 770 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 771                    struct nfs_fsinfo *info)
 772 {
 773         int     status;
 774
 775         status = do_proc_fsinfo(server->client, fhandle, info);
 776         if (status && server->nfs_client->cl_rpcclient != server->client)
 777                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 778         return status;
 779 }
 780
 781 static int
 782 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 783                    struct nfs_pathconf *info)
 784 {
 785         struct rpc_message msg = {
 786                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 787                 .rpc_argp       = fhandle,
 788                 .rpc_resp       = info,
 789         };
 790         int     status;
 791
 792         dprintk("NFS call  pathconf\n");
 793         nfs_fattr_init(info->fattr);
 794         status = rpc_call_sync(server->client, &msg, 0);
 795         dprintk("NFS reply pathconf: %d\n", status);
 796         return status;
 797 }
 798
 799 static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 800 {
 801         struct inode *inode = hdr->inode;
 802
 803         if (hdr->pgio_done_cb != NULL)
 804                 return hdr->pgio_done_cb(task, hdr);
 805
 806         if (nfs3_async_handle_jukebox(task, inode))
 807                 return -EAGAIN;
 808
 809         nfs_invalidate_atime(inode);
 810         nfs_refresh_inode(inode, &hdr->fattr);
 811         return 0;
 812 }
 813
 814 static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
 815                                  struct rpc_message *msg)
 816 {
 817         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 818 }
 819
 820 static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
 821                                       struct nfs_pgio_header *hdr)
 822 {
 823         rpc_call_start(task);
 824         return 0;
 825 }
 826
 827 static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 828 {
 829         struct inode *inode = hdr->inode;
 830
 831         if (hdr->pgio_done_cb != NULL)
 832                 return hdr->pgio_done_cb(task, hdr);
 833
 834         if (nfs3_async_handle_jukebox(task, inode))
 835                 return -EAGAIN;
 836         if (task->tk_status >= 0)
 837                 nfs_writeback_update_inode(hdr);
 838         return 0;
 839 }
 840
 841 static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
 842                                   struct rpc_message *msg)
 843 {
 844         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 845 }
 846
 847 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 848 {
 849         rpc_call_start(task);
 850 }
 851
 852 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
 853 {
 854         if (data->commit_done_cb != NULL)
 855                 return data->commit_done_cb(task, data);
 856
 857         if (nfs3_async_handle_jukebox(task, data->inode))
 858                 return -EAGAIN;
 859         nfs_refresh_inode(data->inode, data->res.fattr);
 860         return 0;
 861 }
 862
 863 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 864 {
 865         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 866 }
 867
 868 static int
 869 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 870 {
 871         struct inode *inode = file_inode(filp);
 872
 873         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
 874 }
 875
 876 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
 877 {
 878         return 0;
 879 }
 880
 881 static int nfs3_return_delegation(struct inode *inode)
 882 {
 883         nfs_wb_all(inode);
 884         return 0;
 885 }
 886
 887 static const struct inode_operations nfs3_dir_inode_operations = {
 888         .create         = nfs_create,
 889         .lookup         = nfs_lookup,
 890         .link           = nfs_link,
 891         .unlink         = nfs_unlink,
 892         .symlink        = nfs_symlink,
 893         .mkdir          = nfs_mkdir,
 894         .rmdir          = nfs_rmdir,
 895         .mknod          = nfs_mknod,
 896         .rename         = nfs_rename,
 897         .permission     = nfs_permission,
 898         .getattr        = nfs_getattr,
 899         .setattr        = nfs_setattr,
 900 #ifdef CONFIG_NFS_V3_ACL
 901         .listxattr      = nfs3_listxattr,
 902         .getxattr       = generic_getxattr,
 903         .setxattr       = generic_setxattr,
 904         .removexattr    = generic_removexattr,
 905         .get_acl        = nfs3_get_acl,
 906         .set_acl        = nfs3_set_acl,
 907 #endif
 908 };
 909
 910 static const struct inode_operations nfs3_file_inode_operations = {
 911         .permission     = nfs_permission,
 912         .getattr        = nfs_getattr,
 913         .setattr        = nfs_setattr,
 914 #ifdef CONFIG_NFS_V3_ACL
 915         .listxattr      = nfs3_listxattr,
 916         .getxattr       = generic_getxattr,
 917         .setxattr       = generic_setxattr,
 918         .removexattr    = generic_removexattr,
 919         .get_acl        = nfs3_get_acl,
 920         .set_acl        = nfs3_set_acl,
 921 #endif
 922 };
 923
 924 const struct nfs_rpc_ops nfs_v3_clientops = {
 925         .version        = 3,                    /* protocol version */
 926         .dentry_ops     = &nfs_dentry_operations,
 927         .dir_inode_ops  = &nfs3_dir_inode_operations,
 928         .file_inode_ops = &nfs3_file_inode_operations,
 929         .file_ops       = &nfs_file_operations,
 930         .getroot        = nfs3_proc_get_root,
 931         .submount       = nfs_submount,
 932         .try_mount      = nfs_try_mount,
 933         .getattr        = nfs3_proc_getattr,
 934         .setattr        = nfs3_proc_setattr,
 935         .lookup         = nfs3_proc_lookup,
 936         .access         = nfs3_proc_access,
 937         .readlink       = nfs3_proc_readlink,
 938         .create         = nfs3_proc_create,
 939         .remove         = nfs3_proc_remove,
 940         .unlink_setup   = nfs3_proc_unlink_setup,
 941         .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
 942         .unlink_done    = nfs3_proc_unlink_done,
 943         .rename_setup   = nfs3_proc_rename_setup,
 944         .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
 945         .rename_done    = nfs3_proc_rename_done,
 946         .link           = nfs3_proc_link,
 947         .symlink        = nfs3_proc_symlink,
 948         .mkdir          = nfs3_proc_mkdir,
 949         .rmdir          = nfs3_proc_rmdir,
 950         .readdir        = nfs3_proc_readdir,
 951         .mknod          = nfs3_proc_mknod,
 952         .statfs         = nfs3_proc_statfs,
 953         .fsinfo         = nfs3_proc_fsinfo,
 954         .pathconf       = nfs3_proc_pathconf,
 955         .decode_dirent  = nfs3_decode_dirent,
 956         .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
 957         .read_setup     = nfs3_proc_read_setup,
 958         .read_done      = nfs3_read_done,
 959         .write_setup    = nfs3_proc_write_setup,
 960         .write_done     = nfs3_write_done,
 961         .commit_setup   = nfs3_proc_commit_setup,
 962         .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
 963         .commit_done    = nfs3_commit_done,
 964         .lock           = nfs3_proc_lock,
 965         .clear_acl_cache = forget_all_cached_acls,
 966         .close_context  = nfs_close_context,
 967         .have_delegation = nfs3_have_delegation,
 968         .return_delegation = nfs3_return_delegation,
 969         .alloc_client   = nfs_alloc_client,
 970         .init_client    = nfs_init_client,
 971         .free_client    = nfs_free_client,
 972         .create_server  = nfs3_create_server,
 973         .clone_server   = nfs3_clone_server,
 974 };