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/filelock.h> 45 #include <linux/lockd/bind.h> 46 #include <linux/freezer.h> 47 #include "internal.h" 48 49 #define NFSDBG_FACILITY NFSDBG_PROC 50 51 /* 52 * Bare-bones access to getattr: this is for nfs_read_super. 53 */ 54 static int 55 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 56 struct nfs_fsinfo *info) 57 { 58 struct nfs_fattr *fattr = info->fattr; 59 struct nfs2_fsstat fsinfo; 60 struct rpc_message msg = { 61 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 62 .rpc_argp = fhandle, 63 .rpc_resp = fattr, 64 }; 65 int status; 66 67 dprintk("%s: call getattr\n", __func__); 68 nfs_fattr_init(fattr); 69 status = rpc_call_sync(server->client, &msg, 0); 70 /* Retry with default authentication if different */ 71 if (status && server->nfs_client->cl_rpcclient != server->client) 72 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 73 dprintk("%s: reply getattr: %d\n", __func__, status); 74 if (status) 75 return status; 76 dprintk("%s: call statfs\n", __func__); 77 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 78 msg.rpc_resp = &fsinfo; 79 status = rpc_call_sync(server->client, &msg, 0); 80 /* Retry with default authentication if different */ 81 if (status && server->nfs_client->cl_rpcclient != server->client) 82 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 83 dprintk("%s: reply statfs: %d\n", __func__, status); 84 if (status) 85 return status; 86 info->rtmax = NFS_MAXDATA; 87 info->rtpref = fsinfo.tsize; 88 info->rtmult = fsinfo.bsize; 89 info->wtmax = NFS_MAXDATA; 90 info->wtpref = fsinfo.tsize; 91 info->wtmult = fsinfo.bsize; 92 info->dtpref = fsinfo.tsize; 93 info->maxfilesize = 0x7FFFFFFF; 94 info->lease_time = 0; 95 info->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED; 96 info->xattr_support = 0; 97 return 0; 98 } 99 100 /* 101 * One function for each procedure in the NFS protocol. 102 */ 103 static int 104 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 105 struct nfs_fattr *fattr, struct inode *inode) 106 { 107 struct rpc_message msg = { 108 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 109 .rpc_argp = fhandle, 110 .rpc_resp = fattr, 111 }; 112 int status; 113 unsigned short task_flags = 0; 114 115 /* Is this is an attribute revalidation, subject to softreval? */ 116 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 117 task_flags |= RPC_TASK_TIMEOUT; 118 119 dprintk("NFS call getattr\n"); 120 nfs_fattr_init(fattr); 121 status = rpc_call_sync(server->client, &msg, task_flags); 122 dprintk("NFS reply getattr: %d\n", status); 123 return status; 124 } 125 126 static int 127 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 128 struct iattr *sattr) 129 { 130 struct inode *inode = d_inode(dentry); 131 struct nfs_sattrargs arg = { 132 .fh = NFS_FH(inode), 133 .sattr = sattr 134 }; 135 struct rpc_message msg = { 136 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 137 .rpc_argp = &arg, 138 .rpc_resp = fattr, 139 }; 140 int status; 141 142 /* Mask out the non-modebit related stuff from attr->ia_mode */ 143 sattr->ia_mode &= S_IALLUGO; 144 145 dprintk("NFS call setattr\n"); 146 if (sattr->ia_valid & ATTR_FILE) 147 msg.rpc_cred = nfs_file_cred(sattr->ia_file); 148 nfs_fattr_init(fattr); 149 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 150 if (status == 0) 151 nfs_setattr_update_inode(inode, sattr, fattr); 152 dprintk("NFS reply setattr: %d\n", status); 153 return status; 154 } 155 156 static int 157 nfs_proc_lookup(struct inode *dir, struct dentry *dentry, const struct qstr *name, 158 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 159 { 160 struct nfs_diropargs arg = { 161 .fh = NFS_FH(dir), 162 .name = name->name, 163 .len = name->len 164 }; 165 struct nfs_diropok res = { 166 .fh = fhandle, 167 .fattr = fattr 168 }; 169 struct rpc_message msg = { 170 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 171 .rpc_argp = &arg, 172 .rpc_resp = &res, 173 }; 174 int status; 175 unsigned short task_flags = 0; 176 177 /* Is this is an attribute revalidation, subject to softreval? */ 178 if (nfs_lookup_is_soft_revalidate(dentry)) 179 task_flags |= RPC_TASK_TIMEOUT; 180 181 dprintk("NFS call lookup %pd2\n", dentry); 182 nfs_fattr_init(fattr); 183 status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); 184 dprintk("NFS reply lookup: %d\n", status); 185 return status; 186 } 187 188 static int nfs_proc_readlink(struct inode *inode, struct page *page, 189 unsigned int pgbase, unsigned int pglen) 190 { 191 struct nfs_readlinkargs args = { 192 .fh = NFS_FH(inode), 193 .pgbase = pgbase, 194 .pglen = pglen, 195 .pages = &page 196 }; 197 struct rpc_message msg = { 198 .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 199 .rpc_argp = &args, 200 }; 201 int status; 202 203 dprintk("NFS call readlink\n"); 204 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 205 dprintk("NFS reply readlink: %d\n", status); 206 return status; 207 } 208 209 struct nfs_createdata { 210 struct nfs_createargs arg; 211 struct nfs_diropok res; 212 struct nfs_fh fhandle; 213 struct nfs_fattr fattr; 214 }; 215 216 static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir, 217 struct dentry *dentry, struct iattr *sattr) 218 { 219 struct nfs_createdata *data; 220 221 data = kmalloc_obj(*data); 222 223 if (data != NULL) { 224 data->arg.fh = NFS_FH(dir); 225 data->arg.name = dentry->d_name.name; 226 data->arg.len = dentry->d_name.len; 227 data->arg.sattr = sattr; 228 nfs_fattr_init(&data->fattr); 229 data->fhandle.size = 0; 230 data->res.fh = &data->fhandle; 231 data->res.fattr = &data->fattr; 232 } 233 return data; 234 }; 235 236 static void nfs_free_createdata(const struct nfs_createdata *data) 237 { 238 kfree(data); 239 } 240 241 static int 242 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 243 int flags) 244 { 245 struct nfs_createdata *data; 246 struct rpc_message msg = { 247 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 248 }; 249 int status = -ENOMEM; 250 251 dprintk("NFS call create %pd\n", dentry); 252 data = nfs_alloc_createdata(dir, dentry, sattr); 253 if (data == NULL) 254 goto out; 255 msg.rpc_argp = &data->arg; 256 msg.rpc_resp = &data->res; 257 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 258 nfs_mark_for_revalidate(dir); 259 if (status == 0) 260 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 261 nfs_free_createdata(data); 262 out: 263 dprintk("NFS reply create: %d\n", status); 264 return status; 265 } 266 267 /* 268 * In NFSv2, mknod is grafted onto the create call. 269 */ 270 static int 271 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 272 dev_t rdev) 273 { 274 struct nfs_createdata *data; 275 struct rpc_message msg = { 276 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 277 }; 278 umode_t mode; 279 int status = -ENOMEM; 280 281 dprintk("NFS call mknod %pd\n", dentry); 282 283 mode = sattr->ia_mode; 284 if (S_ISFIFO(mode)) { 285 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 286 sattr->ia_valid &= ~ATTR_SIZE; 287 } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 288 sattr->ia_valid |= ATTR_SIZE; 289 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 290 } 291 292 data = nfs_alloc_createdata(dir, dentry, sattr); 293 if (data == NULL) 294 goto out; 295 msg.rpc_argp = &data->arg; 296 msg.rpc_resp = &data->res; 297 298 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 299 nfs_mark_for_revalidate(dir); 300 301 if (status == -EINVAL && S_ISFIFO(mode)) { 302 sattr->ia_mode = mode; 303 nfs_fattr_init(data->res.fattr); 304 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 305 } 306 if (status == 0) 307 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 308 nfs_free_createdata(data); 309 out: 310 dprintk("NFS reply mknod: %d\n", status); 311 return status; 312 } 313 314 static int 315 nfs_proc_remove(struct inode *dir, struct dentry *dentry) 316 { 317 struct nfs_removeargs arg = { 318 .fh = NFS_FH(dir), 319 .name = dentry->d_name, 320 }; 321 struct rpc_message msg = { 322 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 323 .rpc_argp = &arg, 324 }; 325 int status; 326 327 dprintk("NFS call remove %pd2\n",dentry); 328 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 329 nfs_mark_for_revalidate(dir); 330 331 dprintk("NFS reply remove: %d\n", status); 332 return status; 333 } 334 335 static void 336 nfs_proc_unlink_setup(struct rpc_message *msg, 337 struct dentry *dentry, 338 struct inode *inode) 339 { 340 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 341 } 342 343 static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 344 { 345 rpc_call_start(task); 346 } 347 348 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 349 { 350 nfs_mark_for_revalidate(dir); 351 return 1; 352 } 353 354 static void 355 nfs_proc_rename_setup(struct rpc_message *msg, 356 struct dentry *old_dentry, 357 struct dentry *new_dentry, 358 struct inode *same_parent) 359 { 360 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; 361 } 362 363 static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 364 { 365 rpc_call_start(task); 366 } 367 368 static int 369 nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 370 struct inode *new_dir) 371 { 372 nfs_mark_for_revalidate(old_dir); 373 nfs_mark_for_revalidate(new_dir); 374 return 1; 375 } 376 377 static int 378 nfs_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 379 { 380 struct nfs_linkargs arg = { 381 .fromfh = NFS_FH(inode), 382 .tofh = NFS_FH(dir), 383 .toname = name->name, 384 .tolen = name->len 385 }; 386 struct rpc_message msg = { 387 .rpc_proc = &nfs_procedures[NFSPROC_LINK], 388 .rpc_argp = &arg, 389 }; 390 int status; 391 392 dprintk("NFS call link %s\n", name->name); 393 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 394 nfs_mark_for_revalidate(inode); 395 nfs_mark_for_revalidate(dir); 396 dprintk("NFS reply link: %d\n", status); 397 return status; 398 } 399 400 static int 401 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct folio *folio, 402 unsigned int len, struct iattr *sattr) 403 { 404 struct page *page = &folio->page; 405 struct nfs_fh *fh; 406 struct nfs_fattr *fattr; 407 struct nfs_symlinkargs arg = { 408 .fromfh = NFS_FH(dir), 409 .fromname = dentry->d_name.name, 410 .fromlen = dentry->d_name.len, 411 .pages = &page, 412 .pathlen = len, 413 .sattr = sattr 414 }; 415 struct rpc_message msg = { 416 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 417 .rpc_argp = &arg, 418 }; 419 int status = -ENAMETOOLONG; 420 421 dprintk("NFS call symlink %pd\n", dentry); 422 423 if (len > NFS2_MAXPATHLEN) 424 goto out; 425 426 fh = nfs_alloc_fhandle(); 427 fattr = nfs_alloc_fattr(); 428 status = -ENOMEM; 429 if (fh == NULL || fattr == NULL) 430 goto out_free; 431 432 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 433 nfs_mark_for_revalidate(dir); 434 435 /* 436 * V2 SYMLINK requests don't return any attributes. Setting the 437 * filehandle size to zero indicates to nfs_instantiate that it 438 * should fill in the data with a LOOKUP call on the wire. 439 */ 440 if (status == 0) 441 status = nfs_instantiate(dentry, fh, fattr); 442 443 out_free: 444 nfs_free_fattr(fattr); 445 nfs_free_fhandle(fh); 446 out: 447 dprintk("NFS reply symlink: %d\n", status); 448 return status; 449 } 450 451 static struct dentry * 452 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 453 { 454 struct nfs_createdata *data; 455 struct rpc_message msg = { 456 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 457 }; 458 struct dentry *alias = NULL; 459 int status = -ENOMEM; 460 461 dprintk("NFS call mkdir %pd\n", dentry); 462 data = nfs_alloc_createdata(dir, dentry, sattr); 463 if (data == NULL) 464 goto out; 465 msg.rpc_argp = &data->arg; 466 msg.rpc_resp = &data->res; 467 468 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 469 nfs_mark_for_revalidate(dir); 470 if (status == 0) { 471 alias = nfs_add_or_obtain(dentry, data->res.fh, data->res.fattr); 472 status = PTR_ERR_OR_ZERO(alias); 473 } else 474 alias = ERR_PTR(status); 475 nfs_free_createdata(data); 476 out: 477 dprintk("NFS reply mkdir: %d\n", status); 478 return alias; 479 } 480 481 static int 482 nfs_proc_rmdir(struct inode *dir, const struct qstr *name) 483 { 484 struct nfs_diropargs arg = { 485 .fh = NFS_FH(dir), 486 .name = name->name, 487 .len = name->len 488 }; 489 struct rpc_message msg = { 490 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 491 .rpc_argp = &arg, 492 }; 493 int status; 494 495 dprintk("NFS call rmdir %s\n", name->name); 496 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 497 nfs_mark_for_revalidate(dir); 498 dprintk("NFS reply rmdir: %d\n", status); 499 return status; 500 } 501 502 /* 503 * The READDIR implementation is somewhat hackish - we pass a temporary 504 * buffer to the encode function, which installs it in the receive 505 * the receive iovec. The decode function just parses the reply to make 506 * sure it is syntactically correct; the entries itself are decoded 507 * from nfs_readdir by calling the decode_entry function directly. 508 */ 509 static int nfs_proc_readdir(struct nfs_readdir_arg *nr_arg, 510 struct nfs_readdir_res *nr_res) 511 { 512 struct inode *dir = d_inode(nr_arg->dentry); 513 struct nfs_readdirargs arg = { 514 .fh = NFS_FH(dir), 515 .cookie = nr_arg->cookie, 516 .count = nr_arg->page_len, 517 .pages = nr_arg->pages, 518 }; 519 struct rpc_message msg = { 520 .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 521 .rpc_argp = &arg, 522 .rpc_cred = nr_arg->cred, 523 }; 524 int status; 525 526 dprintk("NFS call readdir %llu\n", (unsigned long long)nr_arg->cookie); 527 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 528 nr_res->verf[0] = nr_res->verf[1] = 0; 529 530 nfs_invalidate_atime(dir); 531 532 dprintk("NFS reply readdir: %d\n", status); 533 return status; 534 } 535 536 static int 537 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 538 struct nfs_fsstat *stat) 539 { 540 struct nfs2_fsstat fsinfo; 541 struct rpc_message msg = { 542 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 543 .rpc_argp = fhandle, 544 .rpc_resp = &fsinfo, 545 }; 546 int status; 547 548 dprintk("NFS call statfs\n"); 549 nfs_fattr_init(stat->fattr); 550 status = rpc_call_sync(server->client, &msg, 0); 551 dprintk("NFS reply statfs: %d\n", status); 552 if (status) 553 goto out; 554 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 555 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 556 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 557 stat->tfiles = 0; 558 stat->ffiles = 0; 559 stat->afiles = 0; 560 out: 561 return status; 562 } 563 564 static int 565 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 566 struct nfs_fsinfo *info) 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 fsinfo\n"); 577 nfs_fattr_init(info->fattr); 578 status = rpc_call_sync(server->client, &msg, 0); 579 dprintk("NFS reply fsinfo: %d\n", status); 580 if (status) 581 goto out; 582 info->rtmax = NFS_MAXDATA; 583 info->rtpref = fsinfo.tsize; 584 info->rtmult = fsinfo.bsize; 585 info->wtmax = NFS_MAXDATA; 586 info->wtpref = fsinfo.tsize; 587 info->wtmult = fsinfo.bsize; 588 info->dtpref = fsinfo.tsize; 589 info->maxfilesize = 0x7FFFFFFF; 590 info->lease_time = 0; 591 out: 592 return status; 593 } 594 595 static int 596 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 597 struct nfs_pathconf *info) 598 { 599 info->max_link = 0; 600 info->max_namelen = NFS2_MAXNAMLEN; 601 info->case_preserving = true; 602 return 0; 603 } 604 605 static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 606 { 607 struct inode *inode = hdr->inode; 608 609 nfs_invalidate_atime(inode); 610 if (task->tk_status >= 0) { 611 nfs_refresh_inode(inode, hdr->res.fattr); 612 /* Emulate the eof flag, which isn't normally needed in NFSv2 613 * as it is guaranteed to always return the file attributes 614 */ 615 if ((hdr->res.count == 0 && hdr->args.count > 0) || 616 hdr->args.offset + hdr->res.count >= hdr->res.fattr->size) 617 hdr->res.eof = 1; 618 } 619 return 0; 620 } 621 622 static void nfs_proc_read_setup(struct nfs_pgio_header *hdr, 623 struct rpc_message *msg) 624 { 625 msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 626 } 627 628 static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task, 629 struct nfs_pgio_header *hdr) 630 { 631 rpc_call_start(task); 632 return 0; 633 } 634 635 static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 636 { 637 if (task->tk_status >= 0) { 638 hdr->res.count = hdr->args.count; 639 nfs_writeback_update_inode(hdr); 640 } 641 return 0; 642 } 643 644 static void nfs_proc_write_setup(struct nfs_pgio_header *hdr, 645 struct rpc_message *msg, 646 struct rpc_clnt **clnt) 647 { 648 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 649 hdr->args.stable = NFS_FILE_SYNC; 650 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 651 } 652 653 static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 654 { 655 BUG(); 656 } 657 658 static void 659 nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 660 struct rpc_clnt **clnt) 661 { 662 BUG(); 663 } 664 665 static int 666 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 667 { 668 struct inode *inode = file_inode(filp); 669 670 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, NULL); 671 } 672 673 /* Helper functions for NFS lock bounds checking */ 674 #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 675 static int nfs_lock_check_bounds(const struct file_lock *fl) 676 { 677 __s32 start, end; 678 679 start = (__s32)fl->fl_start; 680 if ((loff_t)start != fl->fl_start) 681 goto out_einval; 682 683 if (fl->fl_end != OFFSET_MAX) { 684 end = (__s32)fl->fl_end; 685 if ((loff_t)end != fl->fl_end) 686 goto out_einval; 687 } else 688 end = NFS_LOCK32_OFFSET_MAX; 689 690 if (start < 0 || start > end) 691 goto out_einval; 692 return 0; 693 out_einval: 694 return -EINVAL; 695 } 696 697 static int nfs_have_delegation(struct inode *inode, fmode_t type, int flags) 698 { 699 return 0; 700 } 701 702 static void nfs_return_delegation(struct inode *inode) 703 { 704 if (S_ISREG(inode->i_mode)) 705 nfs_wb_all(inode); 706 } 707 708 static const struct inode_operations nfs_dir_inode_operations = { 709 .create = nfs_create, 710 .lookup = nfs_lookup, 711 .atomic_open = nfs_atomic_open_v23, 712 .link = nfs_link, 713 .unlink = nfs_unlink, 714 .symlink = nfs_symlink, 715 .mkdir = nfs_mkdir, 716 .rmdir = nfs_rmdir, 717 .mknod = nfs_mknod, 718 .rename = nfs_rename, 719 .permission = nfs_permission, 720 .getattr = nfs_getattr, 721 .setattr = nfs_setattr, 722 .fileattr_get = nfs_fileattr_get, 723 }; 724 725 static const struct inode_operations nfs_file_inode_operations = { 726 .permission = nfs_permission, 727 .getattr = nfs_getattr, 728 .setattr = nfs_setattr, 729 .fileattr_get = nfs_fileattr_get, 730 }; 731 732 const struct nfs_rpc_ops nfs_v2_clientops = { 733 .version = 2, /* protocol version */ 734 .dentry_ops = &nfs_dentry_operations, 735 .dir_inode_ops = &nfs_dir_inode_operations, 736 .file_inode_ops = &nfs_file_inode_operations, 737 .file_ops = &nfs_file_operations, 738 .getroot = nfs_proc_get_root, 739 .submount = nfs_submount, 740 .try_get_tree = nfs_try_get_tree, 741 .getattr = nfs_proc_getattr, 742 .setattr = nfs_proc_setattr, 743 .lookup = nfs_proc_lookup, 744 .access = NULL, /* access */ 745 .readlink = nfs_proc_readlink, 746 .create = nfs_proc_create, 747 .remove = nfs_proc_remove, 748 .unlink_setup = nfs_proc_unlink_setup, 749 .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare, 750 .unlink_done = nfs_proc_unlink_done, 751 .rename_setup = nfs_proc_rename_setup, 752 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare, 753 .rename_done = nfs_proc_rename_done, 754 .link = nfs_proc_link, 755 .symlink = nfs_proc_symlink, 756 .mkdir = nfs_proc_mkdir, 757 .rmdir = nfs_proc_rmdir, 758 .readdir = nfs_proc_readdir, 759 .mknod = nfs_proc_mknod, 760 .statfs = nfs_proc_statfs, 761 .fsinfo = nfs_proc_fsinfo, 762 .pathconf = nfs_proc_pathconf, 763 .decode_dirent = nfs2_decode_dirent, 764 .pgio_rpc_prepare = nfs_proc_pgio_rpc_prepare, 765 .read_setup = nfs_proc_read_setup, 766 .read_done = nfs_read_done, 767 .write_setup = nfs_proc_write_setup, 768 .write_done = nfs_write_done, 769 .commit_setup = nfs_proc_commit_setup, 770 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare, 771 .lock = nfs_proc_lock, 772 .lock_check_bounds = nfs_lock_check_bounds, 773 .close_context = nfs_close_context, 774 .have_delegation = nfs_have_delegation, 775 .return_delegation = nfs_return_delegation, 776 .alloc_client = nfs_alloc_client, 777 .init_client = nfs_init_client, 778 .free_client = nfs_free_client, 779 .create_server = nfs_create_server, 780 .clone_server = nfs_clone_server, 781 }; 782