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_TIME_METADATA; 95 return 0; 96 } 97 98 /* 99 * One function for each procedure in the NFS protocol. 100 */ 101 static int 102 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 103 struct nfs_fattr *fattr, struct nfs4_label *label, 104 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 struct nfs4_label *label) 159 { 160 struct nfs_diropargs arg = { 161 .fh = NFS_FH(dir), 162 .name = dentry->d_name.name, 163 .len = dentry->d_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(sizeof(*data), GFP_KERNEL); 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, NULL); 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, NULL); 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 { 359 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; 360 } 361 362 static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 363 { 364 rpc_call_start(task); 365 } 366 367 static int 368 nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 369 struct inode *new_dir) 370 { 371 nfs_mark_for_revalidate(old_dir); 372 nfs_mark_for_revalidate(new_dir); 373 return 1; 374 } 375 376 static int 377 nfs_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 378 { 379 struct nfs_linkargs arg = { 380 .fromfh = NFS_FH(inode), 381 .tofh = NFS_FH(dir), 382 .toname = name->name, 383 .tolen = name->len 384 }; 385 struct rpc_message msg = { 386 .rpc_proc = &nfs_procedures[NFSPROC_LINK], 387 .rpc_argp = &arg, 388 }; 389 int status; 390 391 dprintk("NFS call link %s\n", name->name); 392 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 393 nfs_mark_for_revalidate(inode); 394 nfs_mark_for_revalidate(dir); 395 dprintk("NFS reply link: %d\n", status); 396 return status; 397 } 398 399 static int 400 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 401 unsigned int len, struct iattr *sattr) 402 { 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, NULL); 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, NULL); 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 flags) 691 { 692 return 0; 693 } 694 695 static const struct inode_operations nfs_dir_inode_operations = { 696 .create = nfs_create, 697 .lookup = nfs_lookup, 698 .link = nfs_link, 699 .unlink = nfs_unlink, 700 .symlink = nfs_symlink, 701 .mkdir = nfs_mkdir, 702 .rmdir = nfs_rmdir, 703 .mknod = nfs_mknod, 704 .rename = nfs_rename, 705 .permission = nfs_permission, 706 .getattr = nfs_getattr, 707 .setattr = nfs_setattr, 708 }; 709 710 static const struct inode_operations nfs_file_inode_operations = { 711 .permission = nfs_permission, 712 .getattr = nfs_getattr, 713 .setattr = nfs_setattr, 714 }; 715 716 const struct nfs_rpc_ops nfs_v2_clientops = { 717 .version = 2, /* protocol version */ 718 .dentry_ops = &nfs_dentry_operations, 719 .dir_inode_ops = &nfs_dir_inode_operations, 720 .file_inode_ops = &nfs_file_inode_operations, 721 .file_ops = &nfs_file_operations, 722 .getroot = nfs_proc_get_root, 723 .submount = nfs_submount, 724 .try_get_tree = nfs_try_get_tree, 725 .getattr = nfs_proc_getattr, 726 .setattr = nfs_proc_setattr, 727 .lookup = nfs_proc_lookup, 728 .access = NULL, /* access */ 729 .readlink = nfs_proc_readlink, 730 .create = nfs_proc_create, 731 .remove = nfs_proc_remove, 732 .unlink_setup = nfs_proc_unlink_setup, 733 .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare, 734 .unlink_done = nfs_proc_unlink_done, 735 .rename_setup = nfs_proc_rename_setup, 736 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare, 737 .rename_done = nfs_proc_rename_done, 738 .link = nfs_proc_link, 739 .symlink = nfs_proc_symlink, 740 .mkdir = nfs_proc_mkdir, 741 .rmdir = nfs_proc_rmdir, 742 .readdir = nfs_proc_readdir, 743 .mknod = nfs_proc_mknod, 744 .statfs = nfs_proc_statfs, 745 .fsinfo = nfs_proc_fsinfo, 746 .pathconf = nfs_proc_pathconf, 747 .decode_dirent = nfs2_decode_dirent, 748 .pgio_rpc_prepare = nfs_proc_pgio_rpc_prepare, 749 .read_setup = nfs_proc_read_setup, 750 .read_done = nfs_read_done, 751 .write_setup = nfs_proc_write_setup, 752 .write_done = nfs_write_done, 753 .commit_setup = nfs_proc_commit_setup, 754 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare, 755 .lock = nfs_proc_lock, 756 .lock_check_bounds = nfs_lock_check_bounds, 757 .close_context = nfs_close_context, 758 .have_delegation = nfs_have_delegation, 759 .alloc_client = nfs_alloc_client, 760 .init_client = nfs_init_client, 761 .free_client = nfs_free_client, 762 .create_server = nfs_create_server, 763 .clone_server = nfs_clone_server, 764 }; 765