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, const 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                 nfs_access_set_mask(entry, res.access);
 225         nfs_free_fattr(res.fattr);
 226 out:
 227         dprintk("NFS reply access: %d\n", status);
 228         return status;
 229 }
 230
 231 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
 232                 unsigned int pgbase, unsigned int pglen)
 233 {
 234         struct nfs_fattr        *fattr;
 235         struct nfs3_readlinkargs args = {
 236                 .fh             = NFS_FH(inode),
 237                 .pgbase         = pgbase,
 238                 .pglen          = pglen,
 239                 .pages          = &page
 240         };
 241         struct rpc_message msg = {
 242                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READLINK],
 243                 .rpc_argp       = &args,
 244         };
 245         int status = -ENOMEM;
 246
 247         dprintk("NFS call  readlink\n");
 248         fattr = nfs_alloc_fattr();
 249         if (fattr == NULL)
 250                 goto out;
 251         msg.rpc_resp = fattr;
 252
 253         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 254         nfs_refresh_inode(inode, fattr);
 255         nfs_free_fattr(fattr);
 256 out:
 257         dprintk("NFS reply readlink: %d\n", status);
 258         return status;
 259 }
 260
 261 struct nfs3_createdata {
 262         struct rpc_message msg;
 263         union {
 264                 struct nfs3_createargs create;
 265                 struct nfs3_mkdirargs mkdir;
 266                 struct nfs3_symlinkargs symlink;
 267                 struct nfs3_mknodargs mknod;
 268         } arg;
 269         struct nfs3_diropres res;
 270         struct nfs_fh fh;
 271         struct nfs_fattr fattr;
 272         struct nfs_fattr dir_attr;
 273 };
 274
 275 static struct nfs3_createdata *nfs3_alloc_createdata(void)
 276 {
 277         struct nfs3_createdata *data;
 278
 279         data = kzalloc(sizeof(*data), GFP_KERNEL);
 280         if (data != NULL) {
 281                 data->msg.rpc_argp = &data->arg;
 282                 data->msg.rpc_resp = &data->res;
 283                 data->res.fh = &data->fh;
 284                 data->res.fattr = &data->fattr;
 285                 data->res.dir_attr = &data->dir_attr;
 286                 nfs_fattr_init(data->res.fattr);
 287                 nfs_fattr_init(data->res.dir_attr);
 288         }
 289         return data;
 290 }
 291
 292 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
 293 {
 294         int status;
 295
 296         status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
 297         nfs_post_op_update_inode(dir, data->res.dir_attr);
 298         if (status == 0)
 299                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 300         return status;
 301 }
 302
 303 static void nfs3_free_createdata(struct nfs3_createdata *data)
 304 {
 305         kfree(data);
 306 }
 307
 308 /*
 309  * Create a regular file.
 310  */
 311 static int
 312 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 313                  int flags)
 314 {
 315         struct posix_acl *default_acl, *acl;
 316         struct nfs3_createdata *data;
 317         int status = -ENOMEM;
 318
 319         dprintk("NFS call  create %pd\n", dentry);
 320
 321         data = nfs3_alloc_createdata();
 322         if (data == NULL)
 323                 goto out;
 324
 325         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
 326         data->arg.create.fh = NFS_FH(dir);
 327         data->arg.create.name = dentry->d_name.name;
 328         data->arg.create.len = dentry->d_name.len;
 329         data->arg.create.sattr = sattr;
 330
 331         data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 332         if (flags & O_EXCL) {
 333                 data->arg.create.createmode  = NFS3_CREATE_EXCLUSIVE;
 334                 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
 335                 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
 336         }
 337
 338         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 339         if (status)
 340                 goto out;
 341
 342         for (;;) {
 343                 status = nfs3_do_create(dir, dentry, data);
 344
 345                 if (status != -ENOTSUPP)
 346                         break;
 347                 /* If the server doesn't support the exclusive creation
 348                  * semantics, try again with simple 'guarded' mode. */
 349                 switch (data->arg.create.createmode) {
 350                         case NFS3_CREATE_EXCLUSIVE:
 351                                 data->arg.create.createmode = NFS3_CREATE_GUARDED;
 352                                 break;
 353
 354                         case NFS3_CREATE_GUARDED:
 355                                 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
 356                                 break;
 357
 358                         case NFS3_CREATE_UNCHECKED:
 359                                 goto out;
 360                 }
 361                 nfs_fattr_init(data->res.dir_attr);
 362                 nfs_fattr_init(data->res.fattr);
 363         }
 364
 365         if (status != 0)
 366                 goto out_release_acls;
 367
 368         /* When we created the file with exclusive semantics, make
 369          * sure we set the attributes afterwards. */
 370         if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
 371                 dprintk("NFS call  setattr (post-create)\n");
 372
 373                 if (!(sattr->ia_valid & ATTR_ATIME_SET))
 374                         sattr->ia_valid |= ATTR_ATIME;
 375                 if (!(sattr->ia_valid & ATTR_MTIME_SET))
 376                         sattr->ia_valid |= ATTR_MTIME;
 377
 378                 /* Note: we could use a guarded setattr here, but I'm
 379                  * not sure this buys us anything (and I'd have
 380                  * to revamp the NFSv3 XDR code) */
 381                 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
 382                 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
 383                 dprintk("NFS reply setattr (post-create): %d\n", status);
 384                 if (status != 0)
 385                         goto out_release_acls;
 386         }
 387
 388         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 389
 390 out_release_acls:
 391         posix_acl_release(acl);
 392         posix_acl_release(default_acl);
 393 out:
 394         nfs3_free_createdata(data);
 395         dprintk("NFS reply create: %d\n", status);
 396         return status;
 397 }
 398
 399 static int
 400 nfs3_proc_remove(struct inode *dir, const struct qstr *name)
 401 {
 402         struct nfs_removeargs arg = {
 403                 .fh = NFS_FH(dir),
 404                 .name = *name,
 405         };
 406         struct nfs_removeres res;
 407         struct rpc_message msg = {
 408                 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
 409                 .rpc_argp = &arg,
 410                 .rpc_resp = &res,
 411         };
 412         int status = -ENOMEM;
 413
 414         dprintk("NFS call  remove %s\n", name->name);
 415         res.dir_attr = nfs_alloc_fattr();
 416         if (res.dir_attr == NULL)
 417                 goto out;
 418
 419         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 420         nfs_post_op_update_inode(dir, res.dir_attr);
 421         nfs_free_fattr(res.dir_attr);
 422 out:
 423         dprintk("NFS reply remove: %d\n", status);
 424         return status;
 425 }
 426
 427 static void
 428 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 429 {
 430         msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
 431 }
 432
 433 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 434 {
 435         rpc_call_start(task);
 436 }
 437
 438 static int
 439 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 440 {
 441         struct nfs_removeres *res;
 442         if (nfs3_async_handle_jukebox(task, dir))
 443                 return 0;
 444         res = task->tk_msg.rpc_resp;
 445         nfs_post_op_update_inode(dir, res->dir_attr);
 446         return 1;
 447 }
 448
 449 static void
 450 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 451 {
 452         msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
 453 }
 454
 455 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 456 {
 457         rpc_call_start(task);
 458 }
 459
 460 static int
 461 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 462                       struct inode *new_dir)
 463 {
 464         struct nfs_renameres *res;
 465
 466         if (nfs3_async_handle_jukebox(task, old_dir))
 467                 return 0;
 468         res = task->tk_msg.rpc_resp;
 469
 470         nfs_post_op_update_inode(old_dir, res->old_fattr);
 471         nfs_post_op_update_inode(new_dir, res->new_fattr);
 472         return 1;
 473 }
 474
 475 static int
 476 nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
 477 {
 478         struct nfs3_linkargs    arg = {
 479                 .fromfh         = NFS_FH(inode),
 480                 .tofh           = NFS_FH(dir),
 481                 .toname         = name->name,
 482                 .tolen          = name->len
 483         };
 484         struct nfs3_linkres     res;
 485         struct rpc_message msg = {
 486                 .rpc_proc       = &nfs3_procedures[NFS3PROC_LINK],
 487                 .rpc_argp       = &arg,
 488                 .rpc_resp       = &res,
 489         };
 490         int status = -ENOMEM;
 491
 492         dprintk("NFS call  link %s\n", name->name);
 493         res.fattr = nfs_alloc_fattr();
 494         res.dir_attr = nfs_alloc_fattr();
 495         if (res.fattr == NULL || res.dir_attr == NULL)
 496                 goto out;
 497
 498         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 499         nfs_post_op_update_inode(dir, res.dir_attr);
 500         nfs_post_op_update_inode(inode, res.fattr);
 501 out:
 502         nfs_free_fattr(res.dir_attr);
 503         nfs_free_fattr(res.fattr);
 504         dprintk("NFS reply link: %d\n", status);
 505         return status;
 506 }
 507
 508 static int
 509 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 510                   unsigned int len, struct iattr *sattr)
 511 {
 512         struct nfs3_createdata *data;
 513         int status = -ENOMEM;
 514
 515         if (len > NFS3_MAXPATHLEN)
 516                 return -ENAMETOOLONG;
 517
 518         dprintk("NFS call  symlink %pd\n", dentry);
 519
 520         data = nfs3_alloc_createdata();
 521         if (data == NULL)
 522                 goto out;
 523         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
 524         data->arg.symlink.fromfh = NFS_FH(dir);
 525         data->arg.symlink.fromname = dentry->d_name.name;
 526         data->arg.symlink.fromlen = dentry->d_name.len;
 527         data->arg.symlink.pages = &page;
 528         data->arg.symlink.pathlen = len;
 529         data->arg.symlink.sattr = sattr;
 530
 531         status = nfs3_do_create(dir, dentry, data);
 532
 533         nfs3_free_createdata(data);
 534 out:
 535         dprintk("NFS reply symlink: %d\n", status);
 536         return status;
 537 }
 538
 539 static int
 540 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 541 {
 542         struct posix_acl *default_acl, *acl;
 543         struct nfs3_createdata *data;
 544         int status = -ENOMEM;
 545
 546         dprintk("NFS call  mkdir %pd\n", dentry);
 547
 548         data = nfs3_alloc_createdata();
 549         if (data == NULL)
 550                 goto out;
 551
 552         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 553         if (status)
 554                 goto out;
 555
 556         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
 557         data->arg.mkdir.fh = NFS_FH(dir);
 558         data->arg.mkdir.name = dentry->d_name.name;
 559         data->arg.mkdir.len = dentry->d_name.len;
 560         data->arg.mkdir.sattr = sattr;
 561
 562         status = nfs3_do_create(dir, dentry, data);
 563         if (status != 0)
 564                 goto out_release_acls;
 565
 566         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 567
 568 out_release_acls:
 569         posix_acl_release(acl);
 570         posix_acl_release(default_acl);
 571 out:
 572         nfs3_free_createdata(data);
 573         dprintk("NFS reply mkdir: %d\n", status);
 574         return status;
 575 }
 576
 577 static int
 578 nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
 579 {
 580         struct nfs_fattr        *dir_attr;
 581         struct nfs3_diropargs   arg = {
 582                 .fh             = NFS_FH(dir),
 583                 .name           = name->name,
 584                 .len            = name->len
 585         };
 586         struct rpc_message msg = {
 587                 .rpc_proc       = &nfs3_procedures[NFS3PROC_RMDIR],
 588                 .rpc_argp       = &arg,
 589         };
 590         int status = -ENOMEM;
 591
 592         dprintk("NFS call  rmdir %s\n", name->name);
 593         dir_attr = nfs_alloc_fattr();
 594         if (dir_attr == NULL)
 595                 goto out;
 596
 597         msg.rpc_resp = dir_attr;
 598         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 599         nfs_post_op_update_inode(dir, dir_attr);
 600         nfs_free_fattr(dir_attr);
 601 out:
 602         dprintk("NFS reply rmdir: %d\n", status);
 603         return status;
 604 }
 605
 606 /*
 607  * The READDIR implementation is somewhat hackish - we pass the user buffer
 608  * to the encode function, which installs it in the receive iovec.
 609  * The decode function itself doesn't perform any decoding, it just makes
 610  * sure the reply is syntactically correct.
 611  *
 612  * Also note that this implementation handles both plain readdir and
 613  * readdirplus.
 614  */
 615 static int
 616 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 617                   u64 cookie, struct page **pages, unsigned int count, bool plus)
 618 {
 619         struct inode            *dir = d_inode(dentry);
 620         __be32                  *verf = NFS_I(dir)->cookieverf;
 621         struct nfs3_readdirargs arg = {
 622                 .fh             = NFS_FH(dir),
 623                 .cookie         = cookie,
 624                 .verf           = {verf[0], verf[1]},
 625                 .plus           = plus,
 626                 .count          = count,
 627                 .pages          = pages
 628         };
 629         struct nfs3_readdirres  res = {
 630                 .verf           = verf,
 631                 .plus           = plus
 632         };
 633         struct rpc_message      msg = {
 634                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READDIR],
 635                 .rpc_argp       = &arg,
 636                 .rpc_resp       = &res,
 637                 .rpc_cred       = cred
 638         };
 639         int status = -ENOMEM;
 640
 641         if (plus)
 642                 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
 643
 644         dprintk("NFS call  readdir%s %d\n",
 645                         plus? "plus" : "", (unsigned int) cookie);
 646
 647         res.dir_attr = nfs_alloc_fattr();
 648         if (res.dir_attr == NULL)
 649                 goto out;
 650
 651         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 652
 653         nfs_invalidate_atime(dir);
 654         nfs_refresh_inode(dir, res.dir_attr);
 655
 656         nfs_free_fattr(res.dir_attr);
 657 out:
 658         dprintk("NFS reply readdir%s: %d\n",
 659                         plus? "plus" : "", status);
 660         return status;
 661 }
 662
 663 static int
 664 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 665                 dev_t rdev)
 666 {
 667         struct posix_acl *default_acl, *acl;
 668         struct nfs3_createdata *data;
 669         int status = -ENOMEM;
 670
 671         dprintk("NFS call  mknod %pd %u:%u\n", dentry,
 672                         MAJOR(rdev), MINOR(rdev));
 673
 674         data = nfs3_alloc_createdata();
 675         if (data == NULL)
 676                 goto out;
 677
 678         status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
 679         if (status)
 680                 goto out;
 681
 682         data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
 683         data->arg.mknod.fh = NFS_FH(dir);
 684         data->arg.mknod.name = dentry->d_name.name;
 685         data->arg.mknod.len = dentry->d_name.len;
 686         data->arg.mknod.sattr = sattr;
 687         data->arg.mknod.rdev = rdev;
 688
 689         switch (sattr->ia_mode & S_IFMT) {
 690         case S_IFBLK:
 691                 data->arg.mknod.type = NF3BLK;
 692                 break;
 693         case S_IFCHR:
 694                 data->arg.mknod.type = NF3CHR;
 695                 break;
 696         case S_IFIFO:
 697                 data->arg.mknod.type = NF3FIFO;
 698                 break;
 699         case S_IFSOCK:
 700                 data->arg.mknod.type = NF3SOCK;
 701                 break;
 702         default:
 703                 status = -EINVAL;
 704                 goto out;
 705         }
 706
 707         status = nfs3_do_create(dir, dentry, data);
 708         if (status != 0)
 709                 goto out_release_acls;
 710
 711         status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
 712
 713 out_release_acls:
 714         posix_acl_release(acl);
 715         posix_acl_release(default_acl);
 716 out:
 717         nfs3_free_createdata(data);
 718         dprintk("NFS reply mknod: %d\n", status);
 719         return status;
 720 }
 721
 722 static int
 723 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 724                  struct nfs_fsstat *stat)
 725 {
 726         struct rpc_message msg = {
 727                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSSTAT],
 728                 .rpc_argp       = fhandle,
 729                 .rpc_resp       = stat,
 730         };
 731         int     status;
 732
 733         dprintk("NFS call  fsstat\n");
 734         nfs_fattr_init(stat->fattr);
 735         status = rpc_call_sync(server->client, &msg, 0);
 736         dprintk("NFS reply fsstat: %d\n", status);
 737         return status;
 738 }
 739
 740 static int
 741 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
 742                  struct nfs_fsinfo *info)
 743 {
 744         struct rpc_message msg = {
 745                 .rpc_proc       = &nfs3_procedures[NFS3PROC_FSINFO],
 746                 .rpc_argp       = fhandle,
 747                 .rpc_resp       = info,
 748         };
 749         int     status;
 750
 751         dprintk("NFS call  fsinfo\n");
 752         nfs_fattr_init(info->fattr);
 753         status = rpc_call_sync(client, &msg, 0);
 754         dprintk("NFS reply fsinfo: %d\n", status);
 755         return status;
 756 }
 757
 758 /*
 759  * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
 760  * nfs_create_server
 761  */
 762 static int
 763 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 764                    struct nfs_fsinfo *info)
 765 {
 766         int     status;
 767
 768         status = do_proc_fsinfo(server->client, fhandle, info);
 769         if (status && server->nfs_client->cl_rpcclient != server->client)
 770                 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
 771         return status;
 772 }
 773
 774 static int
 775 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 776                    struct nfs_pathconf *info)
 777 {
 778         struct rpc_message msg = {
 779                 .rpc_proc       = &nfs3_procedures[NFS3PROC_PATHCONF],
 780                 .rpc_argp       = fhandle,
 781                 .rpc_resp       = info,
 782         };
 783         int     status;
 784
 785         dprintk("NFS call  pathconf\n");
 786         nfs_fattr_init(info->fattr);
 787         status = rpc_call_sync(server->client, &msg, 0);
 788         dprintk("NFS reply pathconf: %d\n", status);
 789         return status;
 790 }
 791
 792 static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 793 {
 794         struct inode *inode = hdr->inode;
 795
 796         if (hdr->pgio_done_cb != NULL)
 797                 return hdr->pgio_done_cb(task, hdr);
 798
 799         if (nfs3_async_handle_jukebox(task, inode))
 800                 return -EAGAIN;
 801
 802         nfs_invalidate_atime(inode);
 803         nfs_refresh_inode(inode, &hdr->fattr);
 804         return 0;
 805 }
 806
 807 static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
 808                                  struct rpc_message *msg)
 809 {
 810         msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 811 }
 812
 813 static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
 814                                       struct nfs_pgio_header *hdr)
 815 {
 816         rpc_call_start(task);
 817         return 0;
 818 }
 819
 820 static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 821 {
 822         struct inode *inode = hdr->inode;
 823
 824         if (hdr->pgio_done_cb != NULL)
 825                 return hdr->pgio_done_cb(task, hdr);
 826
 827         if (nfs3_async_handle_jukebox(task, inode))
 828                 return -EAGAIN;
 829         if (task->tk_status >= 0)
 830                 nfs_writeback_update_inode(hdr);
 831         return 0;
 832 }
 833
 834 static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
 835                                   struct rpc_message *msg)
 836 {
 837         msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 838 }
 839
 840 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 841 {
 842         rpc_call_start(task);
 843 }
 844
 845 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
 846 {
 847         if (data->commit_done_cb != NULL)
 848                 return data->commit_done_cb(task, data);
 849
 850         if (nfs3_async_handle_jukebox(task, data->inode))
 851                 return -EAGAIN;
 852         nfs_refresh_inode(data->inode, data->res.fattr);
 853         return 0;
 854 }
 855
 856 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 857 {
 858         msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 859 }
 860
 861 static void nfs3_nlm_alloc_call(void *data)
 862 {
 863         struct nfs_lock_context *l_ctx = data;
 864         if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
 865                 get_nfs_open_context(l_ctx->open_context);
 866                 nfs_get_lock_context(l_ctx->open_context);
 867         }
 868 }
 869
 870 static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
 871 {
 872         struct nfs_lock_context *l_ctx = data;
 873         if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
 874                 return nfs_async_iocounter_wait(task, l_ctx);
 875         return false;
 876
 877 }
 878
 879 static void nfs3_nlm_release_call(void *data)
 880 {
 881         struct nfs_lock_context *l_ctx = data;
 882         struct nfs_open_context *ctx;
 883         if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
 884                 ctx = l_ctx->open_context;
 885                 nfs_put_lock_context(l_ctx);
 886                 put_nfs_open_context(ctx);
 887         }
 888 }
 889
 890 const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
 891         .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
 892         .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
 893         .nlmclnt_release_call = nfs3_nlm_release_call,
 894 };
 895
 896 static int
 897 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 898 {
 899         struct inode *inode = file_inode(filp);
 900         struct nfs_lock_context *l_ctx = NULL;
 901         struct nfs_open_context *ctx = nfs_file_open_context(filp);
 902         int status;
 903
 904         if (fl->fl_flags & FL_CLOSE) {
 905                 l_ctx = nfs_get_lock_context(ctx);
 906                 if (IS_ERR(l_ctx))
 907                         l_ctx = NULL;
 908                 else
 909                         set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
 910         }
 911
 912         status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
 913
 914         if (l_ctx)
 915                 nfs_put_lock_context(l_ctx);
 916
 917         return status;
 918 }
 919
 920 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
 921 {
 922         return 0;
 923 }
 924
 925 static int nfs3_return_delegation(struct inode *inode)
 926 {
 927         nfs_wb_all(inode);
 928         return 0;
 929 }
 930
 931 static const struct inode_operations nfs3_dir_inode_operations = {
 932         .create         = nfs_create,
 933         .lookup         = nfs_lookup,
 934         .link           = nfs_link,
 935         .unlink         = nfs_unlink,
 936         .symlink        = nfs_symlink,
 937         .mkdir          = nfs_mkdir,
 938         .rmdir          = nfs_rmdir,
 939         .mknod          = nfs_mknod,
 940         .rename         = nfs_rename,
 941         .permission     = nfs_permission,
 942         .getattr        = nfs_getattr,
 943         .setattr        = nfs_setattr,
 944 #ifdef CONFIG_NFS_V3_ACL
 945         .listxattr      = nfs3_listxattr,
 946         .get_acl        = nfs3_get_acl,
 947         .set_acl        = nfs3_set_acl,
 948 #endif
 949 };
 950
 951 static const struct inode_operations nfs3_file_inode_operations = {
 952         .permission     = nfs_permission,
 953         .getattr        = nfs_getattr,
 954         .setattr        = nfs_setattr,
 955 #ifdef CONFIG_NFS_V3_ACL
 956         .listxattr      = nfs3_listxattr,
 957         .get_acl        = nfs3_get_acl,
 958         .set_acl        = nfs3_set_acl,
 959 #endif
 960 };
 961
 962 const struct nfs_rpc_ops nfs_v3_clientops = {
 963         .version        = 3,                    /* protocol version */
 964         .dentry_ops     = &nfs_dentry_operations,
 965         .dir_inode_ops  = &nfs3_dir_inode_operations,
 966         .file_inode_ops = &nfs3_file_inode_operations,
 967         .file_ops       = &nfs_file_operations,
 968         .nlmclnt_ops    = &nlmclnt_fl_close_lock_ops,
 969         .getroot        = nfs3_proc_get_root,
 970         .submount       = nfs_submount,
 971         .try_mount      = nfs_try_mount,
 972         .getattr        = nfs3_proc_getattr,
 973         .setattr        = nfs3_proc_setattr,
 974         .lookup         = nfs3_proc_lookup,
 975         .access         = nfs3_proc_access,
 976         .readlink       = nfs3_proc_readlink,
 977         .create         = nfs3_proc_create,
 978         .remove         = nfs3_proc_remove,
 979         .unlink_setup   = nfs3_proc_unlink_setup,
 980         .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
 981         .unlink_done    = nfs3_proc_unlink_done,
 982         .rename_setup   = nfs3_proc_rename_setup,
 983         .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
 984         .rename_done    = nfs3_proc_rename_done,
 985         .link           = nfs3_proc_link,
 986         .symlink        = nfs3_proc_symlink,
 987         .mkdir          = nfs3_proc_mkdir,
 988         .rmdir          = nfs3_proc_rmdir,
 989         .readdir        = nfs3_proc_readdir,
 990         .mknod          = nfs3_proc_mknod,
 991         .statfs         = nfs3_proc_statfs,
 992         .fsinfo         = nfs3_proc_fsinfo,
 993         .pathconf       = nfs3_proc_pathconf,
 994         .decode_dirent  = nfs3_decode_dirent,
 995         .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
 996         .read_setup     = nfs3_proc_read_setup,
 997         .read_done      = nfs3_read_done,
 998         .write_setup    = nfs3_proc_write_setup,
 999         .write_done     = nfs3_write_done,
1000         .commit_setup   = nfs3_proc_commit_setup,
1001         .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
1002         .commit_done    = nfs3_commit_done,
1003         .lock           = nfs3_proc_lock,
1004         .clear_acl_cache = forget_all_cached_acls,
1005         .close_context  = nfs_close_context,
1006         .have_delegation = nfs3_have_delegation,
1007         .return_delegation = nfs3_return_delegation,
1008         .alloc_client   = nfs_alloc_client,
1009         .init_client    = nfs_init_client,
1010         .free_client    = nfs_free_client,
1011         .create_server  = nfs3_create_server,
1012         .clone_server   = nfs3_clone_server,
1013 };