fs/nfs/proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/fs/nfs/proc.c
   4  *
   5  *  Copyright (C) 1992, 1993, 1994  Rick Sladkey
   6  *
   7  *  OS-independent nfs remote procedure call functions
   8  *
   9  *  Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers
  10  *  so at last we can have decent(ish) throughput off a
  11  *  Sun server.
  12  *
  13  *  Coding optimized and cleaned up by Florian La Roche.
  14  *  Note: Error returns are optimized for NFS_OK, which isn't translated via
  15  *  nfs_stat_to_errno(), but happens to be already the right return code.
  16  *
  17  *  Also, the code currently doesn't check the size of the packet, when
  18  *  it decodes the packet.
  19  *
  20  *  Feel free to fix it and mail me the diffs if it worries you.
  21  *
  22  *  Completely rewritten to support the new RPC call interface;
  23  *  rewrote and moved the entire XDR stuff to xdr.c
  24  *  --Olaf Kirch June 1996
  25  *
  26  *  The code below initializes all auto variables explicitly, otherwise
  27  *  it will fail to work as a module (gcc generates a memset call for an
  28  *  incomplete struct).
  29  */
  30
  31 #include <linux/types.h>
  32 #include <linux/param.h>
  33 #include <linux/time.h>
  34 #include <linux/mm.h>
  35 #include <linux/errno.h>
  36 #include <linux/string.h>
  37 #include <linux/in.h>
  38 #include <linux/pagemap.h>
  39 #include <linux/sunrpc/clnt.h>
  40 #include <linux/nfs.h>
  41 #include <linux/nfs2.h>
  42 #include <linux/nfs_fs.h>
  43 #include <linux/nfs_page.h>
  44 #include <linux/lockd/bind.h>
  45 #include <linux/freezer.h>
  46 #include "internal.h"
  47
  48 #define NFSDBG_FACILITY         NFSDBG_PROC
  49
  50 /*
  51  * Bare-bones access to getattr: this is for nfs_read_super.
  52  */
  53 static int
  54 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
  55                   struct nfs_fsinfo *info)
  56 {
  57         struct nfs_fattr *fattr = info->fattr;
  58         struct nfs2_fsstat fsinfo;
  59         struct rpc_message msg = {
  60                 .rpc_proc       = &nfs_procedures[NFSPROC_GETATTR],
  61                 .rpc_argp       = fhandle,
  62                 .rpc_resp       = fattr,
  63         };
  64         int status;
  65
  66         dprintk("%s: call getattr\n", __func__);
  67         nfs_fattr_init(fattr);
  68         status = rpc_call_sync(server->client, &msg, 0);
  69         /* Retry with default authentication if different */
  70         if (status && server->nfs_client->cl_rpcclient != server->client)
  71                 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
  72         dprintk("%s: reply getattr: %d\n", __func__, status);
  73         if (status)
  74                 return status;
  75         dprintk("%s: call statfs\n", __func__);
  76         msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS];
  77         msg.rpc_resp = &fsinfo;
  78         status = rpc_call_sync(server->client, &msg, 0);
  79         /* Retry with default authentication if different */
  80         if (status && server->nfs_client->cl_rpcclient != server->client)
  81                 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0);
  82         dprintk("%s: reply statfs: %d\n", __func__, status);
  83         if (status)
  84                 return status;
  85         info->rtmax  = NFS_MAXDATA;
  86         info->rtpref = fsinfo.tsize;
  87         info->rtmult = fsinfo.bsize;
  88         info->wtmax  = NFS_MAXDATA;
  89         info->wtpref = fsinfo.tsize;
  90         info->wtmult = fsinfo.bsize;
  91         info->dtpref = fsinfo.tsize;
  92         info->maxfilesize = 0x7FFFFFFF;
  93         info->lease_time = 0;
  94         return 0;
  95 }
  96
  97 /*
  98  * One function for each procedure in the NFS protocol.
  99  */
 100 static int
 101 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 102                 struct nfs_fattr *fattr, struct nfs4_label *label)
 103 {
 104         struct rpc_message msg = {
 105                 .rpc_proc       = &nfs_procedures[NFSPROC_GETATTR],
 106                 .rpc_argp       = fhandle,
 107                 .rpc_resp       = fattr,
 108         };
 109         int     status;
 110
 111         dprintk("NFS call  getattr\n");
 112         nfs_fattr_init(fattr);
 113         status = rpc_call_sync(server->client, &msg, 0);
 114         dprintk("NFS reply getattr: %d\n", status);
 115         return status;
 116 }
 117
 118 static int
 119 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
 120                  struct iattr *sattr)
 121 {
 122         struct inode *inode = d_inode(dentry);
 123         struct nfs_sattrargs    arg = {
 124                 .fh     = NFS_FH(inode),
 125                 .sattr  = sattr
 126         };
 127         struct rpc_message msg = {
 128                 .rpc_proc       = &nfs_procedures[NFSPROC_SETATTR],
 129                 .rpc_argp       = &arg,
 130                 .rpc_resp       = fattr,
 131         };
 132         int     status;
 133
 134         /* Mask out the non-modebit related stuff from attr->ia_mode */
 135         sattr->ia_mode &= S_IALLUGO;
 136
 137         dprintk("NFS call  setattr\n");
 138         if (sattr->ia_valid & ATTR_FILE)
 139                 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
 140         nfs_fattr_init(fattr);
 141         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 142         if (status == 0)
 143                 nfs_setattr_update_inode(inode, sattr, fattr);
 144         dprintk("NFS reply setattr: %d\n", status);
 145         return status;
 146 }
 147
 148 static int
 149 nfs_proc_lookup(struct inode *dir, const struct qstr *name,
 150                 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
 151                 struct nfs4_label *label)
 152 {
 153         struct nfs_diropargs    arg = {
 154                 .fh             = NFS_FH(dir),
 155                 .name           = name->name,
 156                 .len            = name->len
 157         };
 158         struct nfs_diropok      res = {
 159                 .fh             = fhandle,
 160                 .fattr          = fattr
 161         };
 162         struct rpc_message msg = {
 163                 .rpc_proc       = &nfs_procedures[NFSPROC_LOOKUP],
 164                 .rpc_argp       = &arg,
 165                 .rpc_resp       = &res,
 166         };
 167         int                     status;
 168
 169         dprintk("NFS call  lookup %s\n", name->name);
 170         nfs_fattr_init(fattr);
 171         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 172         dprintk("NFS reply lookup: %d\n", status);
 173         return status;
 174 }
 175
 176 static int nfs_proc_readlink(struct inode *inode, struct page *page,
 177                 unsigned int pgbase, unsigned int pglen)
 178 {
 179         struct nfs_readlinkargs args = {
 180                 .fh             = NFS_FH(inode),
 181                 .pgbase         = pgbase,
 182                 .pglen          = pglen,
 183                 .pages          = &page
 184         };
 185         struct rpc_message msg = {
 186                 .rpc_proc       = &nfs_procedures[NFSPROC_READLINK],
 187                 .rpc_argp       = &args,
 188         };
 189         int                     status;
 190
 191         dprintk("NFS call  readlink\n");
 192         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 193         dprintk("NFS reply readlink: %d\n", status);
 194         return status;
 195 }
 196
 197 struct nfs_createdata {
 198         struct nfs_createargs arg;
 199         struct nfs_diropok res;
 200         struct nfs_fh fhandle;
 201         struct nfs_fattr fattr;
 202 };
 203
 204 static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir,
 205                 struct dentry *dentry, struct iattr *sattr)
 206 {
 207         struct nfs_createdata *data;
 208
 209         data = kmalloc(sizeof(*data), GFP_KERNEL);
 210
 211         if (data != NULL) {
 212                 data->arg.fh = NFS_FH(dir);
 213                 data->arg.name = dentry->d_name.name;
 214                 data->arg.len = dentry->d_name.len;
 215                 data->arg.sattr = sattr;
 216                 nfs_fattr_init(&data->fattr);
 217                 data->fhandle.size = 0;
 218                 data->res.fh = &data->fhandle;
 219                 data->res.fattr = &data->fattr;
 220         }
 221         return data;
 222 };
 223
 224 static void nfs_free_createdata(const struct nfs_createdata *data)
 225 {
 226         kfree(data);
 227 }
 228
 229 static int
 230 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 231                 int flags)
 232 {
 233         struct nfs_createdata *data;
 234         struct rpc_message msg = {
 235                 .rpc_proc       = &nfs_procedures[NFSPROC_CREATE],
 236         };
 237         int status = -ENOMEM;
 238
 239         dprintk("NFS call  create %pd\n", dentry);
 240         data = nfs_alloc_createdata(dir, dentry, sattr);
 241         if (data == NULL)
 242                 goto out;
 243         msg.rpc_argp = &data->arg;
 244         msg.rpc_resp = &data->res;
 245         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 246         nfs_mark_for_revalidate(dir);
 247         if (status == 0)
 248                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 249         nfs_free_createdata(data);
 250 out:
 251         dprintk("NFS reply create: %d\n", status);
 252         return status;
 253 }
 254
 255 /*
 256  * In NFSv2, mknod is grafted onto the create call.
 257  */
 258 static int
 259 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
 260                dev_t rdev)
 261 {
 262         struct nfs_createdata *data;
 263         struct rpc_message msg = {
 264                 .rpc_proc       = &nfs_procedures[NFSPROC_CREATE],
 265         };
 266         umode_t mode;
 267         int status = -ENOMEM;
 268
 269         dprintk("NFS call  mknod %pd\n", dentry);
 270
 271         mode = sattr->ia_mode;
 272         if (S_ISFIFO(mode)) {
 273                 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR;
 274                 sattr->ia_valid &= ~ATTR_SIZE;
 275         } else if (S_ISCHR(mode) || S_ISBLK(mode)) {
 276                 sattr->ia_valid |= ATTR_SIZE;
 277                 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */
 278         }
 279
 280         data = nfs_alloc_createdata(dir, dentry, sattr);
 281         if (data == NULL)
 282                 goto out;
 283         msg.rpc_argp = &data->arg;
 284         msg.rpc_resp = &data->res;
 285
 286         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 287         nfs_mark_for_revalidate(dir);
 288
 289         if (status == -EINVAL && S_ISFIFO(mode)) {
 290                 sattr->ia_mode = mode;
 291                 nfs_fattr_init(data->res.fattr);
 292                 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 293         }
 294         if (status == 0)
 295                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 296         nfs_free_createdata(data);
 297 out:
 298         dprintk("NFS reply mknod: %d\n", status);
 299         return status;
 300 }
 301
 302 static int
 303 nfs_proc_remove(struct inode *dir, const struct qstr *name)
 304 {
 305         struct nfs_removeargs arg = {
 306                 .fh = NFS_FH(dir),
 307                 .name = *name,
 308         };
 309         struct rpc_message msg = {
 310                 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE],
 311                 .rpc_argp = &arg,
 312         };
 313         int                     status;
 314
 315         dprintk("NFS call  remove %s\n", name->name);
 316         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 317         nfs_mark_for_revalidate(dir);
 318
 319         dprintk("NFS reply remove: %d\n", status);
 320         return status;
 321 }
 322
 323 static void
 324 nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
 325 {
 326         msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE];
 327 }
 328
 329 static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
 330 {
 331         rpc_call_start(task);
 332 }
 333
 334 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir)
 335 {
 336         nfs_mark_for_revalidate(dir);
 337         return 1;
 338 }
 339
 340 static void
 341 nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
 342 {
 343         msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME];
 344 }
 345
 346 static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
 347 {
 348         rpc_call_start(task);
 349 }
 350
 351 static int
 352 nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
 353                      struct inode *new_dir)
 354 {
 355         nfs_mark_for_revalidate(old_dir);
 356         nfs_mark_for_revalidate(new_dir);
 357         return 1;
 358 }
 359
 360 static int
 361 nfs_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
 362 {
 363         struct nfs_linkargs     arg = {
 364                 .fromfh         = NFS_FH(inode),
 365                 .tofh           = NFS_FH(dir),
 366                 .toname         = name->name,
 367                 .tolen          = name->len
 368         };
 369         struct rpc_message msg = {
 370                 .rpc_proc       = &nfs_procedures[NFSPROC_LINK],
 371                 .rpc_argp       = &arg,
 372         };
 373         int                     status;
 374
 375         dprintk("NFS call  link %s\n", name->name);
 376         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
 377         nfs_mark_for_revalidate(inode);
 378         nfs_mark_for_revalidate(dir);
 379         dprintk("NFS reply link: %d\n", status);
 380         return status;
 381 }
 382
 383 static int
 384 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
 385                  unsigned int len, struct iattr *sattr)
 386 {
 387         struct nfs_fh *fh;
 388         struct nfs_fattr *fattr;
 389         struct nfs_symlinkargs  arg = {
 390                 .fromfh         = NFS_FH(dir),
 391                 .fromname       = dentry->d_name.name,
 392                 .fromlen        = dentry->d_name.len,
 393                 .pages          = &page,
 394                 .pathlen        = len,
 395                 .sattr          = sattr
 396         };
 397         struct rpc_message msg = {
 398                 .rpc_proc       = &nfs_procedures[NFSPROC_SYMLINK],
 399                 .rpc_argp       = &arg,
 400         };
 401         int status = -ENAMETOOLONG;
 402
 403         dprintk("NFS call  symlink %pd\n", dentry);
 404
 405         if (len > NFS2_MAXPATHLEN)
 406                 goto out;
 407
 408         fh = nfs_alloc_fhandle();
 409         fattr = nfs_alloc_fattr();
 410         status = -ENOMEM;
 411         if (fh == NULL || fattr == NULL)
 412                 goto out_free;
 413
 414         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 415         nfs_mark_for_revalidate(dir);
 416
 417         /*
 418          * V2 SYMLINK requests don't return any attributes.  Setting the
 419          * filehandle size to zero indicates to nfs_instantiate that it
 420          * should fill in the data with a LOOKUP call on the wire.
 421          */
 422         if (status == 0)
 423                 status = nfs_instantiate(dentry, fh, fattr, NULL);
 424
 425 out_free:
 426         nfs_free_fattr(fattr);
 427         nfs_free_fhandle(fh);
 428 out:
 429         dprintk("NFS reply symlink: %d\n", status);
 430         return status;
 431 }
 432
 433 static int
 434 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
 435 {
 436         struct nfs_createdata *data;
 437         struct rpc_message msg = {
 438                 .rpc_proc       = &nfs_procedures[NFSPROC_MKDIR],
 439         };
 440         int status = -ENOMEM;
 441
 442         dprintk("NFS call  mkdir %pd\n", dentry);
 443         data = nfs_alloc_createdata(dir, dentry, sattr);
 444         if (data == NULL)
 445                 goto out;
 446         msg.rpc_argp = &data->arg;
 447         msg.rpc_resp = &data->res;
 448
 449         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 450         nfs_mark_for_revalidate(dir);
 451         if (status == 0)
 452                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
 453         nfs_free_createdata(data);
 454 out:
 455         dprintk("NFS reply mkdir: %d\n", status);
 456         return status;
 457 }
 458
 459 static int
 460 nfs_proc_rmdir(struct inode *dir, const struct qstr *name)
 461 {
 462         struct nfs_diropargs    arg = {
 463                 .fh             = NFS_FH(dir),
 464                 .name           = name->name,
 465                 .len            = name->len
 466         };
 467         struct rpc_message msg = {
 468                 .rpc_proc       = &nfs_procedures[NFSPROC_RMDIR],
 469                 .rpc_argp       = &arg,
 470         };
 471         int                     status;
 472
 473         dprintk("NFS call  rmdir %s\n", name->name);
 474         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 475         nfs_mark_for_revalidate(dir);
 476         dprintk("NFS reply rmdir: %d\n", status);
 477         return status;
 478 }
 479
 480 /*
 481  * The READDIR implementation is somewhat hackish - we pass a temporary
 482  * buffer to the encode function, which installs it in the receive
 483  * the receive iovec. The decode function just parses the reply to make
 484  * sure it is syntactically correct; the entries itself are decoded
 485  * from nfs_readdir by calling the decode_entry function directly.
 486  */
 487 static int
 488 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
 489                  u64 cookie, struct page **pages, unsigned int count, bool plus)
 490 {
 491         struct inode            *dir = d_inode(dentry);
 492         struct nfs_readdirargs  arg = {
 493                 .fh             = NFS_FH(dir),
 494                 .cookie         = cookie,
 495                 .count          = count,
 496                 .pages          = pages,
 497         };
 498         struct rpc_message      msg = {
 499                 .rpc_proc       = &nfs_procedures[NFSPROC_READDIR],
 500                 .rpc_argp       = &arg,
 501                 .rpc_cred       = cred,
 502         };
 503         int                     status;
 504
 505         dprintk("NFS call  readdir %d\n", (unsigned int)cookie);
 506         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
 507
 508         nfs_invalidate_atime(dir);
 509
 510         dprintk("NFS reply readdir: %d\n", status);
 511         return status;
 512 }
 513
 514 static int
 515 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 516                         struct nfs_fsstat *stat)
 517 {
 518         struct nfs2_fsstat fsinfo;
 519         struct rpc_message msg = {
 520                 .rpc_proc       = &nfs_procedures[NFSPROC_STATFS],
 521                 .rpc_argp       = fhandle,
 522                 .rpc_resp       = &fsinfo,
 523         };
 524         int     status;
 525
 526         dprintk("NFS call  statfs\n");
 527         nfs_fattr_init(stat->fattr);
 528         status = rpc_call_sync(server->client, &msg, 0);
 529         dprintk("NFS reply statfs: %d\n", status);
 530         if (status)
 531                 goto out;
 532         stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize;
 533         stat->fbytes = (u64)fsinfo.bfree  * fsinfo.bsize;
 534         stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize;
 535         stat->tfiles = 0;
 536         stat->ffiles = 0;
 537         stat->afiles = 0;
 538 out:
 539         return status;
 540 }
 541
 542 static int
 543 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 544                         struct nfs_fsinfo *info)
 545 {
 546         struct nfs2_fsstat fsinfo;
 547         struct rpc_message msg = {
 548                 .rpc_proc       = &nfs_procedures[NFSPROC_STATFS],
 549                 .rpc_argp       = fhandle,
 550                 .rpc_resp       = &fsinfo,
 551         };
 552         int     status;
 553
 554         dprintk("NFS call  fsinfo\n");
 555         nfs_fattr_init(info->fattr);
 556         status = rpc_call_sync(server->client, &msg, 0);
 557         dprintk("NFS reply fsinfo: %d\n", status);
 558         if (status)
 559                 goto out;
 560         info->rtmax  = NFS_MAXDATA;
 561         info->rtpref = fsinfo.tsize;
 562         info->rtmult = fsinfo.bsize;
 563         info->wtmax  = NFS_MAXDATA;
 564         info->wtpref = fsinfo.tsize;
 565         info->wtmult = fsinfo.bsize;
 566         info->dtpref = fsinfo.tsize;
 567         info->maxfilesize = 0x7FFFFFFF;
 568         info->lease_time = 0;
 569 out:
 570         return status;
 571 }
 572
 573 static int
 574 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 575                   struct nfs_pathconf *info)
 576 {
 577         info->max_link = 0;
 578         info->max_namelen = NFS2_MAXNAMLEN;
 579         return 0;
 580 }
 581
 582 static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 583 {
 584         struct inode *inode = hdr->inode;
 585
 586         nfs_invalidate_atime(inode);
 587         if (task->tk_status >= 0) {
 588                 nfs_refresh_inode(inode, hdr->res.fattr);
 589                 /* Emulate the eof flag, which isn't normally needed in NFSv2
 590                  * as it is guaranteed to always return the file attributes
 591                  */
 592                 if (hdr->args.offset + hdr->res.count >= hdr->res.fattr->size)
 593                         hdr->res.eof = 1;
 594         }
 595         return 0;
 596 }
 597
 598 static void nfs_proc_read_setup(struct nfs_pgio_header *hdr,
 599                                 struct rpc_message *msg)
 600 {
 601         msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
 602 }
 603
 604 static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task,
 605                                      struct nfs_pgio_header *hdr)
 606 {
 607         rpc_call_start(task);
 608         return 0;
 609 }
 610
 611 static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 612 {
 613         if (task->tk_status >= 0)
 614                 nfs_writeback_update_inode(hdr);
 615         return 0;
 616 }
 617
 618 static void nfs_proc_write_setup(struct nfs_pgio_header *hdr,
 619                                  struct rpc_message *msg)
 620 {
 621         /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
 622         hdr->args.stable = NFS_FILE_SYNC;
 623         msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
 624 }
 625
 626 static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
 627 {
 628         BUG();
 629 }
 630
 631 static void
 632 nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
 633 {
 634         BUG();
 635 }
 636
 637 static int
 638 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
 639 {
 640         struct inode *inode = file_inode(filp);
 641
 642         return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, NULL);
 643 }
 644
 645 /* Helper functions for NFS lock bounds checking */
 646 #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL)
 647 static int nfs_lock_check_bounds(const struct file_lock *fl)
 648 {
 649         __s32 start, end;
 650
 651         start = (__s32)fl->fl_start;
 652         if ((loff_t)start != fl->fl_start)
 653                 goto out_einval;
 654
 655         if (fl->fl_end != OFFSET_MAX) {
 656                 end = (__s32)fl->fl_end;
 657                 if ((loff_t)end != fl->fl_end)
 658                         goto out_einval;
 659         } else
 660                 end = NFS_LOCK32_OFFSET_MAX;
 661
 662         if (start < 0 || start > end)
 663                 goto out_einval;
 664         return 0;
 665 out_einval:
 666         return -EINVAL;
 667 }
 668
 669 static int nfs_have_delegation(struct inode *inode, fmode_t flags)
 670 {
 671         return 0;
 672 }
 673
 674 static int nfs_return_delegation(struct inode *inode)
 675 {
 676         nfs_wb_all(inode);
 677         return 0;
 678 }
 679
 680 static const struct inode_operations nfs_dir_inode_operations = {
 681         .create         = nfs_create,
 682         .lookup         = nfs_lookup,
 683         .link           = nfs_link,
 684         .unlink         = nfs_unlink,
 685         .symlink        = nfs_symlink,
 686         .mkdir          = nfs_mkdir,
 687         .rmdir          = nfs_rmdir,
 688         .mknod          = nfs_mknod,
 689         .rename         = nfs_rename,
 690         .permission     = nfs_permission,
 691         .getattr        = nfs_getattr,
 692         .setattr        = nfs_setattr,
 693 };
 694
 695 static const struct inode_operations nfs_file_inode_operations = {
 696         .permission     = nfs_permission,
 697         .getattr        = nfs_getattr,
 698         .setattr        = nfs_setattr,
 699 };
 700
 701 const struct nfs_rpc_ops nfs_v2_clientops = {
 702         .version        = 2,                   /* protocol version */
 703         .dentry_ops     = &nfs_dentry_operations,
 704         .dir_inode_ops  = &nfs_dir_inode_operations,
 705         .file_inode_ops = &nfs_file_inode_operations,
 706         .file_ops       = &nfs_file_operations,
 707         .getroot        = nfs_proc_get_root,
 708         .submount       = nfs_submount,
 709         .try_mount      = nfs_try_mount,
 710         .getattr        = nfs_proc_getattr,
 711         .setattr        = nfs_proc_setattr,
 712         .lookup         = nfs_proc_lookup,
 713         .access         = NULL,                /* access */
 714         .readlink       = nfs_proc_readlink,
 715         .create         = nfs_proc_create,
 716         .remove         = nfs_proc_remove,
 717         .unlink_setup   = nfs_proc_unlink_setup,
 718         .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare,
 719         .unlink_done    = nfs_proc_unlink_done,
 720         .rename_setup   = nfs_proc_rename_setup,
 721         .rename_rpc_prepare = nfs_proc_rename_rpc_prepare,
 722         .rename_done    = nfs_proc_rename_done,
 723         .link           = nfs_proc_link,
 724         .symlink        = nfs_proc_symlink,
 725         .mkdir          = nfs_proc_mkdir,
 726         .rmdir          = nfs_proc_rmdir,
 727         .readdir        = nfs_proc_readdir,
 728         .mknod          = nfs_proc_mknod,
 729         .statfs         = nfs_proc_statfs,
 730         .fsinfo         = nfs_proc_fsinfo,
 731         .pathconf       = nfs_proc_pathconf,
 732         .decode_dirent  = nfs2_decode_dirent,
 733         .pgio_rpc_prepare = nfs_proc_pgio_rpc_prepare,
 734         .read_setup     = nfs_proc_read_setup,
 735         .read_done      = nfs_read_done,
 736         .write_setup    = nfs_proc_write_setup,
 737         .write_done     = nfs_write_done,
 738         .commit_setup   = nfs_proc_commit_setup,
 739         .commit_rpc_prepare = nfs_proc_commit_rpc_prepare,
 740         .lock           = nfs_proc_lock,
 741         .lock_check_bounds = nfs_lock_check_bounds,
 742         .close_context  = nfs_close_context,
 743         .have_delegation = nfs_have_delegation,
 744         .return_delegation = nfs_return_delegation,
 745         .alloc_client   = nfs_alloc_client,
 746         .init_client    = nfs_init_client,
 747         .free_client    = nfs_free_client,
 748         .create_server  = nfs_create_server,
 749         .clone_server   = nfs_clone_server,
 750 };