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 info->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED; 95 info->xattr_support = 0; 96 return 0; 97 } 98 99 /* 100 * One function for each procedure in the NFS protocol. 101 */ 102 static int 103 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 104 struct nfs_fattr *fattr, struct inode *inode) 105 { 106 struct rpc_message msg = { 107 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 108 .rpc_argp = fhandle, 109 .rpc_resp = fattr, 110 }; 111 int status; 112 unsigned short task_flags = 0; 113 114 /* Is this is an attribute revalidation, subject to softreval? */ 115 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 116 task_flags |= RPC_TASK_TIMEOUT; 117 118 dprintk("NFS call getattr\n"); 119 nfs_fattr_init(fattr); 120 status = rpc_call_sync(server->client, &msg, task_flags); 121 dprintk("NFS reply getattr: %d\n", status); 122 return status; 123 } 124 125 static int 126 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 127 struct iattr *sattr) 128 { 129 struct inode *inode = d_inode(dentry); 130 struct nfs_sattrargs arg = { 131 .fh = NFS_FH(inode), 132 .sattr = sattr 133 }; 134 struct rpc_message msg = { 135 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 136 .rpc_argp = &arg, 137 .rpc_resp = fattr, 138 }; 139 int status; 140 141 /* Mask out the non-modebit related stuff from attr->ia_mode */ 142 sattr->ia_mode &= S_IALLUGO; 143 144 dprintk("NFS call setattr\n"); 145 if (sattr->ia_valid & ATTR_FILE) 146 msg.rpc_cred = nfs_file_cred(sattr->ia_file); 147 nfs_fattr_init(fattr); 148 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 149 if (status == 0) 150 nfs_setattr_update_inode(inode, sattr, fattr); 151 dprintk("NFS reply setattr: %d\n", status); 152 return status; 153 } 154 155 static int 156 nfs_proc_lookup(struct inode *dir, struct dentry *dentry, 157 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 158 { 159 struct nfs_diropargs arg = { 160 .fh = NFS_FH(dir), 161 .name = dentry->d_name.name, 162 .len = dentry->d_name.len 163 }; 164 struct nfs_diropok res = { 165 .fh = fhandle, 166 .fattr = fattr 167 }; 168 struct rpc_message msg = { 169 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 170 .rpc_argp = &arg, 171 .rpc_resp = &res, 172 }; 173 int status; 174 unsigned short task_flags = 0; 175 176 /* Is this is an attribute revalidation, subject to softreval? */ 177 if (nfs_lookup_is_soft_revalidate(dentry)) 178 task_flags |= RPC_TASK_TIMEOUT; 179 180 dprintk("NFS call lookup %pd2\n", dentry); 181 nfs_fattr_init(fattr); 182 status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); 183 dprintk("NFS reply lookup: %d\n", status); 184 return status; 185 } 186 187 static int nfs_proc_readlink(struct inode *inode, struct page *page, 188 unsigned int pgbase, unsigned int pglen) 189 { 190 struct nfs_readlinkargs args = { 191 .fh = NFS_FH(inode), 192 .pgbase = pgbase, 193 .pglen = pglen, 194 .pages = &page 195 }; 196 struct rpc_message msg = { 197 .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 198 .rpc_argp = &args, 199 }; 200 int status; 201 202 dprintk("NFS call readlink\n"); 203 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 204 dprintk("NFS reply readlink: %d\n", status); 205 return status; 206 } 207 208 struct nfs_createdata { 209 struct nfs_createargs arg; 210 struct nfs_diropok res; 211 struct nfs_fh fhandle; 212 struct nfs_fattr fattr; 213 }; 214 215 static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir, 216 struct dentry *dentry, struct iattr *sattr) 217 { 218 struct nfs_createdata *data; 219 220 data = kmalloc(sizeof(*data), GFP_KERNEL); 221 222 if (data != NULL) { 223 data->arg.fh = NFS_FH(dir); 224 data->arg.name = dentry->d_name.name; 225 data->arg.len = dentry->d_name.len; 226 data->arg.sattr = sattr; 227 nfs_fattr_init(&data->fattr); 228 data->fhandle.size = 0; 229 data->res.fh = &data->fhandle; 230 data->res.fattr = &data->fattr; 231 } 232 return data; 233 }; 234 235 static void nfs_free_createdata(const struct nfs_createdata *data) 236 { 237 kfree(data); 238 } 239 240 static int 241 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 242 int flags) 243 { 244 struct nfs_createdata *data; 245 struct rpc_message msg = { 246 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 247 }; 248 int status = -ENOMEM; 249 250 dprintk("NFS call create %pd\n", dentry); 251 data = nfs_alloc_createdata(dir, dentry, sattr); 252 if (data == NULL) 253 goto out; 254 msg.rpc_argp = &data->arg; 255 msg.rpc_resp = &data->res; 256 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 257 nfs_mark_for_revalidate(dir); 258 if (status == 0) 259 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 260 nfs_free_createdata(data); 261 out: 262 dprintk("NFS reply create: %d\n", status); 263 return status; 264 } 265 266 /* 267 * In NFSv2, mknod is grafted onto the create call. 268 */ 269 static int 270 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 271 dev_t rdev) 272 { 273 struct nfs_createdata *data; 274 struct rpc_message msg = { 275 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 276 }; 277 umode_t mode; 278 int status = -ENOMEM; 279 280 dprintk("NFS call mknod %pd\n", dentry); 281 282 mode = sattr->ia_mode; 283 if (S_ISFIFO(mode)) { 284 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 285 sattr->ia_valid &= ~ATTR_SIZE; 286 } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 287 sattr->ia_valid |= ATTR_SIZE; 288 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 289 } 290 291 data = nfs_alloc_createdata(dir, dentry, sattr); 292 if (data == NULL) 293 goto out; 294 msg.rpc_argp = &data->arg; 295 msg.rpc_resp = &data->res; 296 297 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 298 nfs_mark_for_revalidate(dir); 299 300 if (status == -EINVAL && S_ISFIFO(mode)) { 301 sattr->ia_mode = mode; 302 nfs_fattr_init(data->res.fattr); 303 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 304 } 305 if (status == 0) 306 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 307 nfs_free_createdata(data); 308 out: 309 dprintk("NFS reply mknod: %d\n", status); 310 return status; 311 } 312 313 static int 314 nfs_proc_remove(struct inode *dir, struct dentry *dentry) 315 { 316 struct nfs_removeargs arg = { 317 .fh = NFS_FH(dir), 318 .name = dentry->d_name, 319 }; 320 struct rpc_message msg = { 321 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 322 .rpc_argp = &arg, 323 }; 324 int status; 325 326 dprintk("NFS call remove %pd2\n",dentry); 327 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 328 nfs_mark_for_revalidate(dir); 329 330 dprintk("NFS reply remove: %d\n", status); 331 return status; 332 } 333 334 static void 335 nfs_proc_unlink_setup(struct rpc_message *msg, 336 struct dentry *dentry, 337 struct inode *inode) 338 { 339 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 340 } 341 342 static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 343 { 344 rpc_call_start(task); 345 } 346 347 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 348 { 349 nfs_mark_for_revalidate(dir); 350 return 1; 351 } 352 353 static void 354 nfs_proc_rename_setup(struct rpc_message *msg, 355 struct dentry *old_dentry, 356 struct dentry *new_dentry) 357 { 358 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; 359 } 360 361 static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 362 { 363 rpc_call_start(task); 364 } 365 366 static int 367 nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 368 struct inode *new_dir) 369 { 370 nfs_mark_for_revalidate(old_dir); 371 nfs_mark_for_revalidate(new_dir); 372 return 1; 373 } 374 375 static int 376 nfs_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 377 { 378 struct nfs_linkargs arg = { 379 .fromfh = NFS_FH(inode), 380 .tofh = NFS_FH(dir), 381 .toname = name->name, 382 .tolen = name->len 383 }; 384 struct rpc_message msg = { 385 .rpc_proc = &nfs_procedures[NFSPROC_LINK], 386 .rpc_argp = &arg, 387 }; 388 int status; 389 390 dprintk("NFS call link %s\n", name->name); 391 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 392 nfs_mark_for_revalidate(inode); 393 nfs_mark_for_revalidate(dir); 394 dprintk("NFS reply link: %d\n", status); 395 return status; 396 } 397 398 static int 399 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct folio *folio, 400 unsigned int len, struct iattr *sattr) 401 { 402 struct page *page = &folio->page; 403 struct nfs_fh *fh; 404 struct nfs_fattr *fattr; 405 struct nfs_symlinkargs arg = { 406 .fromfh = NFS_FH(dir), 407 .fromname = dentry->d_name.name, 408 .fromlen = dentry->d_name.len, 409 .pages = &page, 410 .pathlen = len, 411 .sattr = sattr 412 }; 413 struct rpc_message msg = { 414 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 415 .rpc_argp = &arg, 416 }; 417 int status = -ENAMETOOLONG; 418 419 dprintk("NFS call symlink %pd\n", dentry); 420 421 if (len > NFS2_MAXPATHLEN) 422 goto out; 423 424 fh = nfs_alloc_fhandle(); 425 fattr = nfs_alloc_fattr(); 426 status = -ENOMEM; 427 if (fh == NULL || fattr == NULL) 428 goto out_free; 429 430 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 431 nfs_mark_for_revalidate(dir); 432 433 /* 434 * V2 SYMLINK requests don't return any attributes. Setting the 435 * filehandle size to zero indicates to nfs_instantiate that it 436 * should fill in the data with a LOOKUP call on the wire. 437 */ 438 if (status == 0) 439 status = nfs_instantiate(dentry, fh, fattr); 440 441 out_free: 442 nfs_free_fattr(fattr); 443 nfs_free_fhandle(fh); 444 out: 445 dprintk("NFS reply symlink: %d\n", status); 446 return status; 447 } 448 449 static int 450 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 451 { 452 struct nfs_createdata *data; 453 struct rpc_message msg = { 454 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 455 }; 456 int status = -ENOMEM; 457 458 dprintk("NFS call mkdir %pd\n", dentry); 459 data = nfs_alloc_createdata(dir, dentry, sattr); 460 if (data == NULL) 461 goto out; 462 msg.rpc_argp = &data->arg; 463 msg.rpc_resp = &data->res; 464 465 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 466 nfs_mark_for_revalidate(dir); 467 if (status == 0) 468 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 469 nfs_free_createdata(data); 470 out: 471 dprintk("NFS reply mkdir: %d\n", status); 472 return status; 473 } 474 475 static int 476 nfs_proc_rmdir(struct inode *dir, const struct qstr *name) 477 { 478 struct nfs_diropargs arg = { 479 .fh = NFS_FH(dir), 480 .name = name->name, 481 .len = name->len 482 }; 483 struct rpc_message msg = { 484 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 485 .rpc_argp = &arg, 486 }; 487 int status; 488 489 dprintk("NFS call rmdir %s\n", name->name); 490 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 491 nfs_mark_for_revalidate(dir); 492 dprintk("NFS reply rmdir: %d\n", status); 493 return status; 494 } 495 496 /* 497 * The READDIR implementation is somewhat hackish - we pass a temporary 498 * buffer to the encode function, which installs it in the receive 499 * the receive iovec. The decode function just parses the reply to make 500 * sure it is syntactically correct; the entries itself are decoded 501 * from nfs_readdir by calling the decode_entry function directly. 502 */ 503 static int nfs_proc_readdir(struct nfs_readdir_arg *nr_arg, 504 struct nfs_readdir_res *nr_res) 505 { 506 struct inode *dir = d_inode(nr_arg->dentry); 507 struct nfs_readdirargs arg = { 508 .fh = NFS_FH(dir), 509 .cookie = nr_arg->cookie, 510 .count = nr_arg->page_len, 511 .pages = nr_arg->pages, 512 }; 513 struct rpc_message msg = { 514 .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 515 .rpc_argp = &arg, 516 .rpc_cred = nr_arg->cred, 517 }; 518 int status; 519 520 dprintk("NFS call readdir %llu\n", (unsigned long long)nr_arg->cookie); 521 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 522 nr_res->verf[0] = nr_res->verf[1] = 0; 523 524 nfs_invalidate_atime(dir); 525 526 dprintk("NFS reply readdir: %d\n", status); 527 return status; 528 } 529 530 static int 531 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 532 struct nfs_fsstat *stat) 533 { 534 struct nfs2_fsstat fsinfo; 535 struct rpc_message msg = { 536 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 537 .rpc_argp = fhandle, 538 .rpc_resp = &fsinfo, 539 }; 540 int status; 541 542 dprintk("NFS call statfs\n"); 543 nfs_fattr_init(stat->fattr); 544 status = rpc_call_sync(server->client, &msg, 0); 545 dprintk("NFS reply statfs: %d\n", status); 546 if (status) 547 goto out; 548 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 549 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 550 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 551 stat->tfiles = 0; 552 stat->ffiles = 0; 553 stat->afiles = 0; 554 out: 555 return status; 556 } 557 558 static int 559 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 560 struct nfs_fsinfo *info) 561 { 562 struct nfs2_fsstat fsinfo; 563 struct rpc_message msg = { 564 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 565 .rpc_argp = fhandle, 566 .rpc_resp = &fsinfo, 567 }; 568 int status; 569 570 dprintk("NFS call fsinfo\n"); 571 nfs_fattr_init(info->fattr); 572 status = rpc_call_sync(server->client, &msg, 0); 573 dprintk("NFS reply fsinfo: %d\n", status); 574 if (status) 575 goto out; 576 info->rtmax = NFS_MAXDATA; 577 info->rtpref = fsinfo.tsize; 578 info->rtmult = fsinfo.bsize; 579 info->wtmax = NFS_MAXDATA; 580 info->wtpref = fsinfo.tsize; 581 info->wtmult = fsinfo.bsize; 582 info->dtpref = fsinfo.tsize; 583 info->maxfilesize = 0x7FFFFFFF; 584 info->lease_time = 0; 585 out: 586 return status; 587 } 588 589 static int 590 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 591 struct nfs_pathconf *info) 592 { 593 info->max_link = 0; 594 info->max_namelen = NFS2_MAXNAMLEN; 595 return 0; 596 } 597 598 static int nfs_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 599 { 600 struct inode *inode = hdr->inode; 601 602 nfs_invalidate_atime(inode); 603 if (task->tk_status >= 0) { 604 nfs_refresh_inode(inode, hdr->res.fattr); 605 /* Emulate the eof flag, which isn't normally needed in NFSv2 606 * as it is guaranteed to always return the file attributes 607 */ 608 if ((hdr->res.count == 0 && hdr->args.count > 0) || 609 hdr->args.offset + hdr->res.count >= hdr->res.fattr->size) 610 hdr->res.eof = 1; 611 } 612 return 0; 613 } 614 615 static void nfs_proc_read_setup(struct nfs_pgio_header *hdr, 616 struct rpc_message *msg) 617 { 618 msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 619 } 620 621 static int nfs_proc_pgio_rpc_prepare(struct rpc_task *task, 622 struct nfs_pgio_header *hdr) 623 { 624 rpc_call_start(task); 625 return 0; 626 } 627 628 static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 629 { 630 if (task->tk_status >= 0) { 631 hdr->res.count = hdr->args.count; 632 nfs_writeback_update_inode(hdr); 633 } 634 return 0; 635 } 636 637 static void nfs_proc_write_setup(struct nfs_pgio_header *hdr, 638 struct rpc_message *msg, 639 struct rpc_clnt **clnt) 640 { 641 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 642 hdr->args.stable = NFS_FILE_SYNC; 643 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 644 } 645 646 static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 647 { 648 BUG(); 649 } 650 651 static void 652 nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 653 struct rpc_clnt **clnt) 654 { 655 BUG(); 656 } 657 658 static int 659 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 660 { 661 struct inode *inode = file_inode(filp); 662 663 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, NULL); 664 } 665 666 /* Helper functions for NFS lock bounds checking */ 667 #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 668 static int nfs_lock_check_bounds(const struct file_lock *fl) 669 { 670 __s32 start, end; 671 672 start = (__s32)fl->fl_start; 673 if ((loff_t)start != fl->fl_start) 674 goto out_einval; 675 676 if (fl->fl_end != OFFSET_MAX) { 677 end = (__s32)fl->fl_end; 678 if ((loff_t)end != fl->fl_end) 679 goto out_einval; 680 } else 681 end = NFS_LOCK32_OFFSET_MAX; 682 683 if (start < 0 || start > end) 684 goto out_einval; 685 return 0; 686 out_einval: 687 return -EINVAL; 688 } 689 690 static int nfs_have_delegation(struct inode *inode, fmode_t type, int flags) 691 { 692 return 0; 693 } 694 695 static int nfs_return_delegation(struct inode *inode) 696 { 697 if (S_ISREG(inode->i_mode)) 698 nfs_wb_all(inode); 699 return 0; 700 } 701 702 static const struct inode_operations nfs_dir_inode_operations = { 703 .create = nfs_create, 704 .lookup = nfs_lookup, 705 .atomic_open = nfs_atomic_open_v23, 706 .link = nfs_link, 707 .unlink = nfs_unlink, 708 .symlink = nfs_symlink, 709 .mkdir = nfs_mkdir, 710 .rmdir = nfs_rmdir, 711 .mknod = nfs_mknod, 712 .rename = nfs_rename, 713 .permission = nfs_permission, 714 .getattr = nfs_getattr, 715 .setattr = nfs_setattr, 716 }; 717 718 static const struct inode_operations nfs_file_inode_operations = { 719 .permission = nfs_permission, 720 .getattr = nfs_getattr, 721 .setattr = nfs_setattr, 722 }; 723 724 const struct nfs_rpc_ops nfs_v2_clientops = { 725 .version = 2, /* protocol version */ 726 .dentry_ops = &nfs_dentry_operations, 727 .dir_inode_ops = &nfs_dir_inode_operations, 728 .file_inode_ops = &nfs_file_inode_operations, 729 .file_ops = &nfs_file_operations, 730 .getroot = nfs_proc_get_root, 731 .submount = nfs_submount, 732 .try_get_tree = nfs_try_get_tree, 733 .getattr = nfs_proc_getattr, 734 .setattr = nfs_proc_setattr, 735 .lookup = nfs_proc_lookup, 736 .access = NULL, /* access */ 737 .readlink = nfs_proc_readlink, 738 .create = nfs_proc_create, 739 .remove = nfs_proc_remove, 740 .unlink_setup = nfs_proc_unlink_setup, 741 .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare, 742 .unlink_done = nfs_proc_unlink_done, 743 .rename_setup = nfs_proc_rename_setup, 744 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare, 745 .rename_done = nfs_proc_rename_done, 746 .link = nfs_proc_link, 747 .symlink = nfs_proc_symlink, 748 .mkdir = nfs_proc_mkdir, 749 .rmdir = nfs_proc_rmdir, 750 .readdir = nfs_proc_readdir, 751 .mknod = nfs_proc_mknod, 752 .statfs = nfs_proc_statfs, 753 .fsinfo = nfs_proc_fsinfo, 754 .pathconf = nfs_proc_pathconf, 755 .decode_dirent = nfs2_decode_dirent, 756 .pgio_rpc_prepare = nfs_proc_pgio_rpc_prepare, 757 .read_setup = nfs_proc_read_setup, 758 .read_done = nfs_read_done, 759 .write_setup = nfs_proc_write_setup, 760 .write_done = nfs_write_done, 761 .commit_setup = nfs_proc_commit_setup, 762 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare, 763 .lock = nfs_proc_lock, 764 .lock_check_bounds = nfs_lock_check_bounds, 765 .close_context = nfs_close_context, 766 .have_delegation = nfs_have_delegation, 767 .return_delegation = nfs_return_delegation, 768 .alloc_client = nfs_alloc_client, 769 .init_client = nfs_init_client, 770 .free_client = nfs_free_client, 771 .create_server = nfs_create_server, 772 .clone_server = nfs_clone_server, 773 }; 774