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 <linux/freezer.h> 45 #include "internal.h" 46 47 #define NFSDBG_FACILITY NFSDBG_PROC 48 49 /* 50 * wrapper to handle the -EKEYEXPIRED error message. This should generally 51 * only happen if using krb5 auth and a user's TGT expires. NFSv2 doesn't 52 * support the NFSERR_JUKEBOX error code, but we handle this situation in the 53 * same way that we handle that error with NFSv3. 54 */ 55 static int 56 nfs_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) 57 { 58 int res; 59 do { 60 res = rpc_call_sync(clnt, msg, flags); 61 if (res != -EKEYEXPIRED) 62 break; 63 freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME); 64 res = -ERESTARTSYS; 65 } while (!fatal_signal_pending(current)); 66 return res; 67 } 68 69 #define rpc_call_sync(clnt, msg, flags) nfs_rpc_wrapper(clnt, msg, flags) 70 71 static int 72 nfs_async_handle_expired_key(struct rpc_task *task) 73 { 74 if (task->tk_status != -EKEYEXPIRED) 75 return 0; 76 task->tk_status = 0; 77 rpc_restart_call(task); 78 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); 79 return 1; 80 } 81 82 /* 83 * Bare-bones access to getattr: this is for nfs_read_super. 84 */ 85 static int 86 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 87 struct nfs_fsinfo *info) 88 { 89 struct nfs_fattr *fattr = info->fattr; 90 struct nfs2_fsstat fsinfo; 91 struct rpc_message msg = { 92 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 93 .rpc_argp = fhandle, 94 .rpc_resp = fattr, 95 }; 96 int status; 97 98 dprintk("%s: call getattr\n", __func__); 99 nfs_fattr_init(fattr); 100 status = rpc_call_sync(server->client, &msg, 0); 101 /* Retry with default authentication if different */ 102 if (status && server->nfs_client->cl_rpcclient != server->client) 103 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 104 dprintk("%s: reply getattr: %d\n", __func__, status); 105 if (status) 106 return status; 107 dprintk("%s: call statfs\n", __func__); 108 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 109 msg.rpc_resp = &fsinfo; 110 status = rpc_call_sync(server->client, &msg, 0); 111 /* Retry with default authentication if different */ 112 if (status && server->nfs_client->cl_rpcclient != server->client) 113 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 114 dprintk("%s: reply statfs: %d\n", __func__, status); 115 if (status) 116 return status; 117 info->rtmax = NFS_MAXDATA; 118 info->rtpref = fsinfo.tsize; 119 info->rtmult = fsinfo.bsize; 120 info->wtmax = NFS_MAXDATA; 121 info->wtpref = fsinfo.tsize; 122 info->wtmult = fsinfo.bsize; 123 info->dtpref = fsinfo.tsize; 124 info->maxfilesize = 0x7FFFFFFF; 125 info->lease_time = 0; 126 return 0; 127 } 128 129 /* 130 * One function for each procedure in the NFS protocol. 131 */ 132 static int 133 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 134 struct nfs_fattr *fattr) 135 { 136 struct rpc_message msg = { 137 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 138 .rpc_argp = fhandle, 139 .rpc_resp = fattr, 140 }; 141 int status; 142 143 dprintk("NFS call getattr\n"); 144 nfs_fattr_init(fattr); 145 status = rpc_call_sync(server->client, &msg, 0); 146 dprintk("NFS reply getattr: %d\n", status); 147 return status; 148 } 149 150 static int 151 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 152 struct iattr *sattr) 153 { 154 struct inode *inode = dentry->d_inode; 155 struct nfs_sattrargs arg = { 156 .fh = NFS_FH(inode), 157 .sattr = sattr 158 }; 159 struct rpc_message msg = { 160 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 161 .rpc_argp = &arg, 162 .rpc_resp = fattr, 163 }; 164 int status; 165 166 /* Mask out the non-modebit related stuff from attr->ia_mode */ 167 sattr->ia_mode &= S_IALLUGO; 168 169 dprintk("NFS call setattr\n"); 170 if (sattr->ia_valid & ATTR_FILE) 171 msg.rpc_cred = nfs_file_cred(sattr->ia_file); 172 nfs_fattr_init(fattr); 173 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 174 if (status == 0) 175 nfs_setattr_update_inode(inode, sattr); 176 dprintk("NFS reply setattr: %d\n", status); 177 return status; 178 } 179 180 static int 181 nfs_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name, 182 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 183 { 184 struct nfs_diropargs arg = { 185 .fh = NFS_FH(dir), 186 .name = name->name, 187 .len = name->len 188 }; 189 struct nfs_diropok res = { 190 .fh = fhandle, 191 .fattr = fattr 192 }; 193 struct rpc_message msg = { 194 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 195 .rpc_argp = &arg, 196 .rpc_resp = &res, 197 }; 198 int status; 199 200 dprintk("NFS call lookup %s\n", name->name); 201 nfs_fattr_init(fattr); 202 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 203 dprintk("NFS reply lookup: %d\n", status); 204 return status; 205 } 206 207 static int nfs_proc_readlink(struct inode *inode, struct page *page, 208 unsigned int pgbase, unsigned int pglen) 209 { 210 struct nfs_readlinkargs args = { 211 .fh = NFS_FH(inode), 212 .pgbase = pgbase, 213 .pglen = pglen, 214 .pages = &page 215 }; 216 struct rpc_message msg = { 217 .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 218 .rpc_argp = &args, 219 }; 220 int status; 221 222 dprintk("NFS call readlink\n"); 223 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 224 dprintk("NFS reply readlink: %d\n", status); 225 return status; 226 } 227 228 struct nfs_createdata { 229 struct nfs_createargs arg; 230 struct nfs_diropok res; 231 struct nfs_fh fhandle; 232 struct nfs_fattr fattr; 233 }; 234 235 static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir, 236 struct dentry *dentry, struct iattr *sattr) 237 { 238 struct nfs_createdata *data; 239 240 data = kmalloc(sizeof(*data), GFP_KERNEL); 241 242 if (data != NULL) { 243 data->arg.fh = NFS_FH(dir); 244 data->arg.name = dentry->d_name.name; 245 data->arg.len = dentry->d_name.len; 246 data->arg.sattr = sattr; 247 nfs_fattr_init(&data->fattr); 248 data->fhandle.size = 0; 249 data->res.fh = &data->fhandle; 250 data->res.fattr = &data->fattr; 251 } 252 return data; 253 }; 254 255 static void nfs_free_createdata(const struct nfs_createdata *data) 256 { 257 kfree(data); 258 } 259 260 static int 261 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 262 int flags, struct nfs_open_context *ctx) 263 { 264 struct nfs_createdata *data; 265 struct rpc_message msg = { 266 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 267 }; 268 int status = -ENOMEM; 269 270 dprintk("NFS call create %s\n", dentry->d_name.name); 271 data = nfs_alloc_createdata(dir, dentry, sattr); 272 if (data == NULL) 273 goto out; 274 msg.rpc_argp = &data->arg; 275 msg.rpc_resp = &data->res; 276 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 277 nfs_mark_for_revalidate(dir); 278 if (status == 0) 279 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 280 nfs_free_createdata(data); 281 out: 282 dprintk("NFS reply create: %d\n", status); 283 return status; 284 } 285 286 /* 287 * In NFSv2, mknod is grafted onto the create call. 288 */ 289 static int 290 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 291 dev_t rdev) 292 { 293 struct nfs_createdata *data; 294 struct rpc_message msg = { 295 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 296 }; 297 umode_t mode; 298 int status = -ENOMEM; 299 300 dprintk("NFS call mknod %s\n", dentry->d_name.name); 301 302 mode = sattr->ia_mode; 303 if (S_ISFIFO(mode)) { 304 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 305 sattr->ia_valid &= ~ATTR_SIZE; 306 } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 307 sattr->ia_valid |= ATTR_SIZE; 308 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 309 } 310 311 data = nfs_alloc_createdata(dir, dentry, sattr); 312 if (data == NULL) 313 goto out; 314 msg.rpc_argp = &data->arg; 315 msg.rpc_resp = &data->res; 316 317 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 318 nfs_mark_for_revalidate(dir); 319 320 if (status == -EINVAL && S_ISFIFO(mode)) { 321 sattr->ia_mode = mode; 322 nfs_fattr_init(data->res.fattr); 323 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 324 } 325 if (status == 0) 326 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 327 nfs_free_createdata(data); 328 out: 329 dprintk("NFS reply mknod: %d\n", status); 330 return status; 331 } 332 333 static int 334 nfs_proc_remove(struct inode *dir, struct qstr *name) 335 { 336 struct nfs_removeargs arg = { 337 .fh = NFS_FH(dir), 338 .name.len = name->len, 339 .name.name = name->name, 340 }; 341 struct rpc_message msg = { 342 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 343 .rpc_argp = &arg, 344 }; 345 int status; 346 347 dprintk("NFS call remove %s\n", name->name); 348 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 349 nfs_mark_for_revalidate(dir); 350 351 dprintk("NFS reply remove: %d\n", status); 352 return status; 353 } 354 355 static void 356 nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 357 { 358 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 359 } 360 361 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 362 { 363 if (nfs_async_handle_expired_key(task)) 364 return 0; 365 nfs_mark_for_revalidate(dir); 366 return 1; 367 } 368 369 static void 370 nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 371 { 372 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; 373 } 374 375 static int 376 nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 377 struct inode *new_dir) 378 { 379 if (nfs_async_handle_expired_key(task)) 380 return 0; 381 nfs_mark_for_revalidate(old_dir); 382 nfs_mark_for_revalidate(new_dir); 383 return 1; 384 } 385 386 static int 387 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 388 struct inode *new_dir, struct qstr *new_name) 389 { 390 struct nfs_renameargs arg = { 391 .old_dir = NFS_FH(old_dir), 392 .old_name = old_name, 393 .new_dir = NFS_FH(new_dir), 394 .new_name = new_name, 395 }; 396 struct rpc_message msg = { 397 .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 398 .rpc_argp = &arg, 399 }; 400 int status; 401 402 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 403 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 404 nfs_mark_for_revalidate(old_dir); 405 nfs_mark_for_revalidate(new_dir); 406 dprintk("NFS reply rename: %d\n", status); 407 return status; 408 } 409 410 static int 411 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 412 { 413 struct nfs_linkargs arg = { 414 .fromfh = NFS_FH(inode), 415 .tofh = NFS_FH(dir), 416 .toname = name->name, 417 .tolen = name->len 418 }; 419 struct rpc_message msg = { 420 .rpc_proc = &nfs_procedures[NFSPROC_LINK], 421 .rpc_argp = &arg, 422 }; 423 int status; 424 425 dprintk("NFS call link %s\n", name->name); 426 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 427 nfs_mark_for_revalidate(inode); 428 nfs_mark_for_revalidate(dir); 429 dprintk("NFS reply link: %d\n", status); 430 return status; 431 } 432 433 static int 434 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 435 unsigned int len, struct iattr *sattr) 436 { 437 struct nfs_fh *fh; 438 struct nfs_fattr *fattr; 439 struct nfs_symlinkargs arg = { 440 .fromfh = NFS_FH(dir), 441 .fromname = dentry->d_name.name, 442 .fromlen = dentry->d_name.len, 443 .pages = &page, 444 .pathlen = len, 445 .sattr = sattr 446 }; 447 struct rpc_message msg = { 448 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 449 .rpc_argp = &arg, 450 }; 451 int status = -ENAMETOOLONG; 452 453 dprintk("NFS call symlink %s\n", dentry->d_name.name); 454 455 if (len > NFS2_MAXPATHLEN) 456 goto out; 457 458 fh = nfs_alloc_fhandle(); 459 fattr = nfs_alloc_fattr(); 460 status = -ENOMEM; 461 if (fh == NULL || fattr == NULL) 462 goto out_free; 463 464 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 465 nfs_mark_for_revalidate(dir); 466 467 /* 468 * V2 SYMLINK requests don't return any attributes. Setting the 469 * filehandle size to zero indicates to nfs_instantiate that it 470 * should fill in the data with a LOOKUP call on the wire. 471 */ 472 if (status == 0) 473 status = nfs_instantiate(dentry, fh, fattr); 474 475 out_free: 476 nfs_free_fattr(fattr); 477 nfs_free_fhandle(fh); 478 out: 479 dprintk("NFS reply symlink: %d\n", status); 480 return status; 481 } 482 483 static int 484 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 485 { 486 struct nfs_createdata *data; 487 struct rpc_message msg = { 488 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 489 }; 490 int status = -ENOMEM; 491 492 dprintk("NFS call mkdir %s\n", dentry->d_name.name); 493 data = nfs_alloc_createdata(dir, dentry, sattr); 494 if (data == NULL) 495 goto out; 496 msg.rpc_argp = &data->arg; 497 msg.rpc_resp = &data->res; 498 499 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 500 nfs_mark_for_revalidate(dir); 501 if (status == 0) 502 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 503 nfs_free_createdata(data); 504 out: 505 dprintk("NFS reply mkdir: %d\n", status); 506 return status; 507 } 508 509 static int 510 nfs_proc_rmdir(struct inode *dir, struct qstr *name) 511 { 512 struct nfs_diropargs arg = { 513 .fh = NFS_FH(dir), 514 .name = name->name, 515 .len = name->len 516 }; 517 struct rpc_message msg = { 518 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 519 .rpc_argp = &arg, 520 }; 521 int status; 522 523 dprintk("NFS call rmdir %s\n", name->name); 524 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 525 nfs_mark_for_revalidate(dir); 526 dprintk("NFS reply rmdir: %d\n", status); 527 return status; 528 } 529 530 /* 531 * The READDIR implementation is somewhat hackish - we pass a temporary 532 * buffer to the encode function, which installs it in the receive 533 * the receive iovec. The decode function just parses the reply to make 534 * sure it is syntactically correct; the entries itself are decoded 535 * from nfs_readdir by calling the decode_entry function directly. 536 */ 537 static int 538 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 539 u64 cookie, struct page **pages, unsigned int count, int plus) 540 { 541 struct inode *dir = dentry->d_inode; 542 struct nfs_readdirargs arg = { 543 .fh = NFS_FH(dir), 544 .cookie = cookie, 545 .count = count, 546 .pages = pages, 547 }; 548 struct rpc_message msg = { 549 .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 550 .rpc_argp = &arg, 551 .rpc_cred = cred, 552 }; 553 int status; 554 555 dprintk("NFS call readdir %d\n", (unsigned int)cookie); 556 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 557 558 nfs_invalidate_atime(dir); 559 560 dprintk("NFS reply readdir: %d\n", status); 561 return status; 562 } 563 564 static int 565 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 566 struct nfs_fsstat *stat) 567 { 568 struct nfs2_fsstat fsinfo; 569 struct rpc_message msg = { 570 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 571 .rpc_argp = fhandle, 572 .rpc_resp = &fsinfo, 573 }; 574 int status; 575 576 dprintk("NFS call statfs\n"); 577 nfs_fattr_init(stat->fattr); 578 status = rpc_call_sync(server->client, &msg, 0); 579 dprintk("NFS reply statfs: %d\n", status); 580 if (status) 581 goto out; 582 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 583 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 584 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 585 stat->tfiles = 0; 586 stat->ffiles = 0; 587 stat->afiles = 0; 588 out: 589 return status; 590 } 591 592 static int 593 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 594 struct nfs_fsinfo *info) 595 { 596 struct nfs2_fsstat fsinfo; 597 struct rpc_message msg = { 598 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 599 .rpc_argp = fhandle, 600 .rpc_resp = &fsinfo, 601 }; 602 int status; 603 604 dprintk("NFS call fsinfo\n"); 605 nfs_fattr_init(info->fattr); 606 status = rpc_call_sync(server->client, &msg, 0); 607 dprintk("NFS reply fsinfo: %d\n", status); 608 if (status) 609 goto out; 610 info->rtmax = NFS_MAXDATA; 611 info->rtpref = fsinfo.tsize; 612 info->rtmult = fsinfo.bsize; 613 info->wtmax = NFS_MAXDATA; 614 info->wtpref = fsinfo.tsize; 615 info->wtmult = fsinfo.bsize; 616 info->dtpref = fsinfo.tsize; 617 info->maxfilesize = 0x7FFFFFFF; 618 info->lease_time = 0; 619 out: 620 return status; 621 } 622 623 static int 624 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 625 struct nfs_pathconf *info) 626 { 627 info->max_link = 0; 628 info->max_namelen = NFS2_MAXNAMLEN; 629 return 0; 630 } 631 632 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 633 { 634 if (nfs_async_handle_expired_key(task)) 635 return -EAGAIN; 636 637 nfs_invalidate_atime(data->inode); 638 if (task->tk_status >= 0) { 639 nfs_refresh_inode(data->inode, data->res.fattr); 640 /* Emulate the eof flag, which isn't normally needed in NFSv2 641 * as it is guaranteed to always return the file attributes 642 */ 643 if (data->args.offset + data->args.count >= data->res.fattr->size) 644 data->res.eof = 1; 645 } 646 return 0; 647 } 648 649 static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 650 { 651 msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 652 } 653 654 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 655 { 656 if (nfs_async_handle_expired_key(task)) 657 return -EAGAIN; 658 659 if (task->tk_status >= 0) 660 nfs_post_op_update_inode_force_wcc(data->inode, data->res.fattr); 661 return 0; 662 } 663 664 static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 665 { 666 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 667 data->args.stable = NFS_FILE_SYNC; 668 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 669 } 670 671 static void 672 nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) 673 { 674 BUG(); 675 } 676 677 static int 678 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 679 { 680 struct inode *inode = filp->f_path.dentry->d_inode; 681 682 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 683 } 684 685 /* Helper functions for NFS lock bounds checking */ 686 #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 687 static int nfs_lock_check_bounds(const struct file_lock *fl) 688 { 689 __s32 start, end; 690 691 start = (__s32)fl->fl_start; 692 if ((loff_t)start != fl->fl_start) 693 goto out_einval; 694 695 if (fl->fl_end != OFFSET_MAX) { 696 end = (__s32)fl->fl_end; 697 if ((loff_t)end != fl->fl_end) 698 goto out_einval; 699 } else 700 end = NFS_LOCK32_OFFSET_MAX; 701 702 if (start < 0 || start > end) 703 goto out_einval; 704 return 0; 705 out_einval: 706 return -EINVAL; 707 } 708 709 const struct nfs_rpc_ops nfs_v2_clientops = { 710 .version = 2, /* protocol version */ 711 .dentry_ops = &nfs_dentry_operations, 712 .dir_inode_ops = &nfs_dir_inode_operations, 713 .file_inode_ops = &nfs_file_inode_operations, 714 .file_ops = &nfs_file_operations, 715 .getroot = nfs_proc_get_root, 716 .getattr = nfs_proc_getattr, 717 .setattr = nfs_proc_setattr, 718 .lookup = nfs_proc_lookup, 719 .access = NULL, /* access */ 720 .readlink = nfs_proc_readlink, 721 .create = nfs_proc_create, 722 .remove = nfs_proc_remove, 723 .unlink_setup = nfs_proc_unlink_setup, 724 .unlink_done = nfs_proc_unlink_done, 725 .rename = nfs_proc_rename, 726 .rename_setup = nfs_proc_rename_setup, 727 .rename_done = nfs_proc_rename_done, 728 .link = nfs_proc_link, 729 .symlink = nfs_proc_symlink, 730 .mkdir = nfs_proc_mkdir, 731 .rmdir = nfs_proc_rmdir, 732 .readdir = nfs_proc_readdir, 733 .mknod = nfs_proc_mknod, 734 .statfs = nfs_proc_statfs, 735 .fsinfo = nfs_proc_fsinfo, 736 .pathconf = nfs_proc_pathconf, 737 .decode_dirent = nfs2_decode_dirent, 738 .read_setup = nfs_proc_read_setup, 739 .read_done = nfs_read_done, 740 .write_setup = nfs_proc_write_setup, 741 .write_done = nfs_write_done, 742 .commit_setup = nfs_proc_commit_setup, 743 .lock = nfs_proc_lock, 744 .lock_check_bounds = nfs_lock_check_bounds, 745 .close_context = nfs_close_context, 746 .init_client = nfs_init_client, 747 }; 748