1 /* 2 * linux/fs/nfs/proc.c 3 * 4 * Copyright (C) 1992, 1993, 1994 Rick Sladkey 5 * 6 * OS-independent nfs remote procedure call functions 7 * 8 * Tuned by Alan Cox <A.Cox@swansea.ac.uk> for >3K buffers 9 * so at last we can have decent(ish) throughput off a 10 * Sun server. 11 * 12 * Coding optimized and cleaned up by Florian La Roche. 13 * Note: Error returns are optimized for NFS_OK, which isn't translated via 14 * nfs_stat_to_errno(), but happens to be already the right return code. 15 * 16 * Also, the code currently doesn't check the size of the packet, when 17 * it decodes the packet. 18 * 19 * Feel free to fix it and mail me the diffs if it worries you. 20 * 21 * Completely rewritten to support the new RPC call interface; 22 * rewrote and moved the entire XDR stuff to xdr.c 23 * --Olaf Kirch June 1996 24 * 25 * The code below initializes all auto variables explicitly, otherwise 26 * it will fail to work as a module (gcc generates a memset call for an 27 * incomplete struct). 28 */ 29 30 #include <linux/types.h> 31 #include <linux/param.h> 32 #include <linux/time.h> 33 #include <linux/mm.h> 34 #include <linux/errno.h> 35 #include <linux/string.h> 36 #include <linux/in.h> 37 #include <linux/pagemap.h> 38 #include <linux/sunrpc/clnt.h> 39 #include <linux/nfs.h> 40 #include <linux/nfs2.h> 41 #include <linux/nfs_fs.h> 42 #include <linux/nfs_page.h> 43 #include <linux/lockd/bind.h> 44 #include "internal.h" 45 46 #define NFSDBG_FACILITY NFSDBG_PROC 47 48 /* 49 * wrapper to handle the -EKEYEXPIRED error message. This should generally 50 * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't 51 * support the NFSERR_JUKEBOX error code, but we handle this situation in the 52 * same way that we handle that error with NFSv3. 53 */ 54 static int 55 nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 56 { 57 int res; 58 do { 59 res = rpc_call_sync(clnt, msg, flags); 60 if (res != -EKEYEXPIRED) 61 break; 62 schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); 63 res = -ERESTARTSYS; 64 } while (!fatal_signal_pending(current)); 65 return res; 66 } 67 68 #define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags) 69 70 static int 71 nfs_async_handle_expired_key(struct rpc_task *task) 72 { 73 if (task->tk_status != -EKEYEXPIRED) 74 return 0; 75 task->tk_status = 0; 76 rpc_restart_call(task); 77 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 78 return 1; 79 } 80 81 /* 82 * Bare-bones access to getattr: this is for nfs_read_super. 83 */ 84 static int 85 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 86 struct nfs_fsinfo *info) 87 { 88 struct nfs_fattr *fattr = info->fattr; 89 struct nfs2_fsstat fsinfo; 90 struct rpc_message msg = { 91 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 92 .rpc_argp = fhandle, 93 .rpc_resp = fattr, 94 }; 95 int status; 96 97 dprintk("%s: call getattr\n", __func__); 98 nfs_fattr_init(fattr); 99 status = rpc_call_sync(server->client, &msg, 0); 100 /* Retry with default authentication if different */ 101 if (status && server->nfs_client->cl_rpcclient != server->client) 102 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 103 dprintk("%s: reply getattr: %d\n", __func__, status); 104 if (status) 105 return status; 106 dprintk("%s: call statfs\n", __func__); 107 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 108 msg.rpc_resp = &fsinfo; 109 status = rpc_call_sync(server->client, &msg, 0); 110 /* Retry with default authentication if different */ 111 if (status && server->nfs_client->cl_rpcclient != server->client) 112 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 113 dprintk("%s: reply statfs: %d\n", __func__, status); 114 if (status) 115 return status; 116 info->rtmax = NFS_MAXDATA; 117 info->rtpref = fsinfo.tsize; 118 info->rtmult = fsinfo.bsize; 119 info->wtmax = NFS_MAXDATA; 120 info->wtpref = fsinfo.tsize; 121 info->wtmult = fsinfo.bsize; 122 info->dtpref = fsinfo.tsize; 123 info->maxfilesize = 0x7FFFFFFF; 124 info->lease_time = 0; 125 return 0; 126 } 127 128 /* 129 * One function for each procedure in the NFS protocol. 130 */ 131 static int 132 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 133 struct nfs_fattr *fattr) 134 { 135 struct rpc_message msg = { 136 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 137 .rpc_argp = fhandle, 138 .rpc_resp = fattr, 139 }; 140 int status; 141 142 dprintk("NFS call getattr\n"); 143 nfs_fattr_init(fattr); 144 status = rpc_call_sync(server->client, &msg, 0); 145 dprintk("NFS reply getattr: %d\n", status); 146 return status; 147 } 148 149 static int 150 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 151 struct iattr *sattr) 152 { 153 struct inode *inode = dentry->d_inode; 154 struct nfs_sattrargs arg = { 155 .fh = NFS_FH(inode), 156 .sattr = sattr 157 }; 158 struct rpc_message msg = { 159 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 160 .rpc_argp = &arg, 161 .rpc_resp = fattr, 162 }; 163 int status; 164 165 /* Mask out the non-modebit related stuff from attr->ia_mode */ 166 sattr->ia_mode &= S_IALLUGO; 167 168 dprintk("NFS call setattr\n"); 169 if (sattr->ia_valid & ATTR_FILE) 170 msg.rpc_cred = nfs_file_cred(sattr->ia_file); 171 nfs_fattr_init(fattr); 172 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 173 if (status == 0) 174 nfs_setattr_update_inode(inode, sattr); 175 dprintk("NFS reply setattr: %d\n", status); 176 return status; 177 } 178 179 static int 180 nfs_proc_lookup(struct inode *dir, struct qstr *name, 181 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 182 { 183 struct nfs_diropargs arg = { 184 .fh = NFS_FH(dir), 185 .name = name->name, 186 .len = name->len 187 }; 188 struct nfs_diropok res = { 189 .fh = fhandle, 190 .fattr = fattr 191 }; 192 struct rpc_message msg = { 193 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 194 .rpc_argp = &arg, 195 .rpc_resp = &res, 196 }; 197 int status; 198 199 dprintk("NFS call lookup %s\n", name->name); 200 nfs_fattr_init(fattr); 201 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 202 dprintk("NFS reply lookup: %d\n", status); 203 return status; 204 } 205 206 static int nfs_proc_readlink(struct inode *inode, struct page *page, 207 unsigned int pgbase, unsigned int pglen) 208 { 209 struct nfs_readlinkargs args = { 210 .fh = NFS_FH(inode), 211 .pgbase = pgbase, 212 .pglen = pglen, 213 .pages = &page 214 }; 215 struct rpc_message msg = { 216 .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 217 .rpc_argp = &args, 218 }; 219 int status; 220 221 dprintk("NFS call readlink\n"); 222 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 223 dprintk("NFS reply readlink: %d\n", status); 224 return status; 225 } 226 227 struct nfs_createdata { 228 struct nfs_createargs arg; 229 struct nfs_diropok res; 230 struct nfs_fh fhandle; 231 struct nfs_fattr fattr; 232 }; 233 234 static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir, 235 struct dentry *dentry, struct iattr *sattr) 236 { 237 struct nfs_createdata *data; 238 239 data = kmalloc(sizeof(*data), GFP_KERNEL); 240 241 if (data != NULL) { 242 data->arg.fh = NFS_FH(dir); 243 data->arg.name = dentry->d_name.name; 244 data->arg.len = dentry->d_name.len; 245 data->arg.sattr = sattr; 246 nfs_fattr_init(&data->fattr); 247 data->fhandle.size = 0; 248 data->res.fh = &data->fhandle; 249 data->res.fattr = &data->fattr; 250 } 251 return data; 252 }; 253 254 static void nfs_free_createdata(const struct nfs_createdata *data) 255 { 256 kfree(data); 257 } 258 259 static int 260 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 261 int flags, struct nfs_open_context *ctx) 262 { 263 struct nfs_createdata *data; 264 struct rpc_message msg = { 265 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 266 }; 267 int status = -ENOMEM; 268 269 dprintk("NFS call create %s\n", dentry->d_name.name); 270 data = nfs_alloc_createdata(dir, dentry, sattr); 271 if (data == NULL) 272 goto out; 273 msg.rpc_argp = &data->arg; 274 msg.rpc_resp = &data->res; 275 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 276 nfs_mark_for_revalidate(dir); 277 if (status == 0) 278 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 279 nfs_free_createdata(data); 280 out: 281 dprintk("NFS reply create: %d\n", status); 282 return status; 283 } 284 285 /* 286 * In NFSv2, mknod is grafted onto the create call. 287 */ 288 static int 289 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 290 dev_t rdev) 291 { 292 struct nfs_createdata *data; 293 struct rpc_message msg = { 294 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 295 }; 296 umode_t mode; 297 int status = -ENOMEM; 298 299 dprintk("NFS call mknod %s\n", dentry->d_name.name); 300 301 mode = sattr->ia_mode; 302 if (S_ISFIFO(mode)) { 303 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 304 sattr->ia_valid &= ~ATTR_SIZE; 305 } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 306 sattr->ia_valid |= ATTR_SIZE; 307 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 308 } 309 310 data = nfs_alloc_createdata(dir, dentry, sattr); 311 if (data == NULL) 312 goto out; 313 msg.rpc_argp = &data->arg; 314 msg.rpc_resp = &data->res; 315 316 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 317 nfs_mark_for_revalidate(dir); 318 319 if (status == -EINVAL && S_ISFIFO(mode)) { 320 sattr->ia_mode = mode; 321 nfs_fattr_init(data->res.fattr); 322 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 323 } 324 if (status == 0) 325 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 326 nfs_free_createdata(data); 327 out: 328 dprintk("NFS reply mknod: %d\n", status); 329 return status; 330 } 331 332 static int 333 nfs_proc_remove(struct inode *dir, struct qstr *name) 334 { 335 struct nfs_removeargs arg = { 336 .fh = NFS_FH(dir), 337 .name.len = name->len, 338 .name.name = name->name, 339 }; 340 struct rpc_message msg = { 341 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 342 .rpc_argp = &arg, 343 }; 344 int status; 345 346 dprintk("NFS call remove %s\n", name->name); 347 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 348 nfs_mark_for_revalidate(dir); 349 350 dprintk("NFS reply remove: %d\n", status); 351 return status; 352 } 353 354 static void 355 nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 356 { 357 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 358 } 359 360 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 361 { 362 if (nfs_async_handle_expired_key(task)) 363 return 0; 364 nfs_mark_for_revalidate(dir); 365 return 1; 366 } 367 368 static int 369 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 370 struct inode *new_dir, struct qstr *new_name) 371 { 372 struct nfs_renameargs arg = { 373 .fromfh = NFS_FH(old_dir), 374 .fromname = old_name->name, 375 .fromlen = old_name->len, 376 .tofh = NFS_FH(new_dir), 377 .toname = new_name->name, 378 .tolen = new_name->len 379 }; 380 struct rpc_message msg = { 381 .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 382 .rpc_argp = &arg, 383 }; 384 int status; 385 386 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 387 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 388 nfs_mark_for_revalidate(old_dir); 389 nfs_mark_for_revalidate(new_dir); 390 dprintk("NFS reply rename: %d\n", status); 391 return status; 392 } 393 394 static int 395 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 396 { 397 struct nfs_linkargs arg = { 398 .fromfh = NFS_FH(inode), 399 .tofh = NFS_FH(dir), 400 .toname = name->name, 401 .tolen = name->len 402 }; 403 struct rpc_message msg = { 404 .rpc_proc = &nfs_procedures[NFSPROC_LINK], 405 .rpc_argp = &arg, 406 }; 407 int status; 408 409 dprintk("NFS call link %s\n", name->name); 410 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 411 nfs_mark_for_revalidate(inode); 412 nfs_mark_for_revalidate(dir); 413 dprintk("NFS reply link: %d\n", status); 414 return status; 415 } 416 417 static int 418 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 419 unsigned int len, struct iattr *sattr) 420 { 421 struct nfs_fh *fh; 422 struct nfs_fattr *fattr; 423 struct nfs_symlinkargs arg = { 424 .fromfh = NFS_FH(dir), 425 .fromname = dentry->d_name.name, 426 .fromlen = dentry->d_name.len, 427 .pages = &page, 428 .pathlen = len, 429 .sattr = sattr 430 }; 431 struct rpc_message msg = { 432 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 433 .rpc_argp = &arg, 434 }; 435 int status = -ENAMETOOLONG; 436 437 dprintk("NFS call symlink %s\n", dentry->d_name.name); 438 439 if (len > NFS2_MAXPATHLEN) 440 goto out; 441 442 fh = nfs_alloc_fhandle(); 443 fattr = nfs_alloc_fattr(); 444 status = -ENOMEM; 445 if (fh == NULL || fattr == NULL) 446 goto out; 447 448 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 449 nfs_mark_for_revalidate(dir); 450 451 /* 452 * V2 SYMLINK requests don't return any attributes. Setting the 453 * filehandle size to zero indicates to nfs_instantiate that it 454 * should fill in the data with a LOOKUP call on the wire. 455 */ 456 if (status == 0) 457 status = nfs_instantiate(dentry, fh, fattr); 458 459 nfs_free_fattr(fattr); 460 nfs_free_fhandle(fh); 461 out: 462 dprintk("NFS reply symlink: %d\n", status); 463 return status; 464 } 465 466 static int 467 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 468 { 469 struct nfs_createdata *data; 470 struct rpc_message msg = { 471 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 472 }; 473 int status = -ENOMEM; 474 475 dprintk("NFS call mkdir %s\n", dentry->d_name.name); 476 data = nfs_alloc_createdata(dir, dentry, sattr); 477 if (data == NULL) 478 goto out; 479 msg.rpc_argp = &data->arg; 480 msg.rpc_resp = &data->res; 481 482 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 483 nfs_mark_for_revalidate(dir); 484 if (status == 0) 485 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 486 nfs_free_createdata(data); 487 out: 488 dprintk("NFS reply mkdir: %d\n", status); 489 return status; 490 } 491 492 static int 493 nfs_proc_rmdir(struct inode *dir, struct qstr *name) 494 { 495 struct nfs_diropargs arg = { 496 .fh = NFS_FH(dir), 497 .name = name->name, 498 .len = name->len 499 }; 500 struct rpc_message msg = { 501 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 502 .rpc_argp = &arg, 503 }; 504 int status; 505 506 dprintk("NFS call rmdir %s\n", name->name); 507 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 508 nfs_mark_for_revalidate(dir); 509 dprintk("NFS reply rmdir: %d\n", status); 510 return status; 511 } 512 513 /* 514 * The READDIR implementation is somewhat hackish - we pass a temporary 515 * buffer to the encode function, which installs it in the receive 516 * the receive iovec. The decode function just parses the reply to make 517 * sure it is syntactically correct; the entries itself are decoded 518 * from nfs_readdir by calling the decode_entry function directly. 519 */ 520 static int 521 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 522 u64 cookie, struct page *page, unsigned int count, int plus) 523 { 524 struct inode *dir = dentry->d_inode; 525 struct nfs_readdirargs arg = { 526 .fh = NFS_FH(dir), 527 .cookie = cookie, 528 .count = count, 529 .pages = &page, 530 }; 531 struct rpc_message msg = { 532 .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 533 .rpc_argp = &arg, 534 .rpc_cred = cred, 535 }; 536 int status; 537 538 dprintk("NFS call readdir %d\n", (unsigned int)cookie); 539 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 540 541 nfs_invalidate_atime(dir); 542 543 dprintk("NFS reply readdir: %d\n", status); 544 return status; 545 } 546 547 static int 548 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 549 struct nfs_fsstat *stat) 550 { 551 struct nfs2_fsstat fsinfo; 552 struct rpc_message msg = { 553 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 554 .rpc_argp = fhandle, 555 .rpc_resp = &fsinfo, 556 }; 557 int status; 558 559 dprintk("NFS call statfs\n"); 560 nfs_fattr_init(stat->fattr); 561 status = rpc_call_sync(server->client, &msg, 0); 562 dprintk("NFS reply statfs: %d\n", status); 563 if (status) 564 goto out; 565 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 566 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 567 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 568 stat->tfiles = 0; 569 stat->ffiles = 0; 570 stat->afiles = 0; 571 out: 572 return status; 573 } 574 575 static int 576 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 577 struct nfs_fsinfo *info) 578 { 579 struct nfs2_fsstat fsinfo; 580 struct rpc_message msg = { 581 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 582 .rpc_argp = fhandle, 583 .rpc_resp = &fsinfo, 584 }; 585 int status; 586 587 dprintk("NFS call fsinfo\n"); 588 nfs_fattr_init(info->fattr); 589 status = rpc_call_sync(server->client, &msg, 0); 590 dprintk("NFS reply fsinfo: %d\n", status); 591 if (status) 592 goto out; 593 info->rtmax = NFS_MAXDATA; 594 info->rtpref = fsinfo.tsize; 595 info->rtmult = fsinfo.bsize; 596 info->wtmax = NFS_MAXDATA; 597 info->wtpref = fsinfo.tsize; 598 info->wtmult = fsinfo.bsize; 599 info->dtpref = fsinfo.tsize; 600 info->maxfilesize = 0x7FFFFFFF; 601 info->lease_time = 0; 602 out: 603 return status; 604 } 605 606 static int 607 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 608 struct nfs_pathconf *info) 609 { 610 info->max_link = 0; 611 info->max_namelen = NFS2_MAXNAMLEN; 612 return 0; 613 } 614 615 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 616 { 617 if (nfs_async_handle_expired_key(task)) 618 return -EAGAIN; 619 620 nfs_invalidate_atime(data->inode); 621 if (task->tk_status >= 0) { 622 nfs_refresh_inode(data->inode, data->res.fattr); 623 /* Emulate the eof flag, which isn't normally needed in NFSv2 624 * as it is guaranteed to always return the file attributes 625 */ 626 if (data->args.offset + data->args.count >= data->res.fattr->size) 627 data->res.eof = 1; 628 } 629 return 0; 630 } 631 632 static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 633 { 634 msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 635 } 636 637 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 638 { 639 if (nfs_async_handle_expired_key(task)) 640 return -EAGAIN; 641 642 if (task->tk_status >= 0) 643 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); 644 return 0; 645 } 646 647 static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 648 { 649 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 650 data->args.stable = NFS_FILE_SYNC; 651 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 652 } 653 654 static void 655 nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 656 { 657 BUG(); 658 } 659 660 static int 661 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 662 { 663 struct inode *inode = filp->f_path.dentry->d_inode; 664 665 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 666 } 667 668 /* Helper functions for NFS lock bounds checking */ 669 #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 670 static int nfs_lock_check_bounds(const struct file_lock *fl) 671 { 672 __s32 start, end; 673 674 start = (__s32)fl->fl_start; 675 if ((loff_t)start != fl->fl_start) 676 goto out_einval; 677 678 if (fl->fl_end != OFFSET_MAX) { 679 end = (__s32)fl->fl_end; 680 if ((loff_t)end != fl->fl_end) 681 goto out_einval; 682 } else 683 end = NFS_LOCK32_OFFSET_MAX; 684 685 if (start < 0 || start > end) 686 goto out_einval; 687 return 0; 688 out_einval: 689 return -EINVAL; 690 } 691 692 const struct nfs_rpc_ops nfs_v2_clientops = { 693 .version = 2, /* protocol version */ 694 .dentry_ops = &nfs_dentry_operations, 695 .dir_inode_ops = &nfs_dir_inode_operations, 696 .file_inode_ops = &nfs_file_inode_operations, 697 .getroot = nfs_proc_get_root, 698 .getattr = nfs_proc_getattr, 699 .setattr = nfs_proc_setattr, 700 .lookup = nfs_proc_lookup, 701 .access = NULL, /* access */ 702 .readlink = nfs_proc_readlink, 703 .create = nfs_proc_create, 704 .remove = nfs_proc_remove, 705 .unlink_setup = nfs_proc_unlink_setup, 706 .unlink_done = nfs_proc_unlink_done, 707 .rename = nfs_proc_rename, 708 .link = nfs_proc_link, 709 .symlink = nfs_proc_symlink, 710 .mkdir = nfs_proc_mkdir, 711 .rmdir = nfs_proc_rmdir, 712 .readdir = nfs_proc_readdir, 713 .mknod = nfs_proc_mknod, 714 .statfs = nfs_proc_statfs, 715 .fsinfo = nfs_proc_fsinfo, 716 .pathconf = nfs_proc_pathconf, 717 .decode_dirent = nfs_decode_dirent, 718 .read_setup = nfs_proc_read_setup, 719 .read_done = nfs_read_done, 720 .write_setup = nfs_proc_write_setup, 721 .write_done = nfs_write_done, 722 .commit_setup = nfs_proc_commit_setup, 723 .lock = nfs_proc_lock, 724 .lock_check_bounds = nfs_lock_check_bounds, 725 .close_context = nfs_close_context, 726 }; 727