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 * Bare-bones access to getattr: this is for nfs_read_super. 51 */ 52 static int 53 nfs_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, 54 struct nfs_fsinfo *info) 55 { 56 struct nfs_fattr *fattr = info->fattr; 57 struct nfs2_fsstat fsinfo; 58 struct rpc_message msg = { 59 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 60 .rpc_argp = fhandle, 61 .rpc_resp = fattr, 62 }; 63 int status; 64 65 dprintk("%s: call getattr\n", __func__); 66 nfs_fattr_init(fattr); 67 status = rpc_call_sync(server->client, &msg, 0); 68 /* Retry with default authentication if different */ 69 if (status && server->nfs_client->cl_rpcclient != server->client) 70 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 71 dprintk("%s: reply getattr: %d\n", __func__, status); 72 if (status) 73 return status; 74 dprintk("%s: call statfs\n", __func__); 75 msg.rpc_proc = &nfs_procedures[NFSPROC_STATFS]; 76 msg.rpc_resp = &fsinfo; 77 status = rpc_call_sync(server->client, &msg, 0); 78 /* Retry with default authentication if different */ 79 if (status && server->nfs_client->cl_rpcclient != server->client) 80 status = rpc_call_sync(server->nfs_client->cl_rpcclient, &msg, 0); 81 dprintk("%s: reply statfs: %d\n", __func__, status); 82 if (status) 83 return status; 84 info->rtmax = NFS_MAXDATA; 85 info->rtpref = fsinfo.tsize; 86 info->rtmult = fsinfo.bsize; 87 info->wtmax = NFS_MAXDATA; 88 info->wtpref = fsinfo.tsize; 89 info->wtmult = fsinfo.bsize; 90 info->dtpref = fsinfo.tsize; 91 info->maxfilesize = 0x7FFFFFFF; 92 info->lease_time = 0; 93 return 0; 94 } 95 96 /* 97 * One function for each procedure in the NFS protocol. 98 */ 99 static int 100 nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 101 struct nfs_fattr *fattr, struct nfs4_label *label) 102 { 103 struct rpc_message msg = { 104 .rpc_proc = &nfs_procedures[NFSPROC_GETATTR], 105 .rpc_argp = fhandle, 106 .rpc_resp = fattr, 107 }; 108 int status; 109 110 dprintk("NFS call getattr\n"); 111 nfs_fattr_init(fattr); 112 status = rpc_call_sync(server->client, &msg, 0); 113 dprintk("NFS reply getattr: %d\n", status); 114 return status; 115 } 116 117 static int 118 nfs_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 119 struct iattr *sattr) 120 { 121 struct inode *inode = dentry->d_inode; 122 struct nfs_sattrargs arg = { 123 .fh = NFS_FH(inode), 124 .sattr = sattr 125 }; 126 struct rpc_message msg = { 127 .rpc_proc = &nfs_procedures[NFSPROC_SETATTR], 128 .rpc_argp = &arg, 129 .rpc_resp = fattr, 130 }; 131 int status; 132 133 /* Mask out the non-modebit related stuff from attr->ia_mode */ 134 sattr->ia_mode &= S_IALLUGO; 135 136 dprintk("NFS call setattr\n"); 137 if (sattr->ia_valid & ATTR_FILE) 138 msg.rpc_cred = nfs_file_cred(sattr->ia_file); 139 nfs_fattr_init(fattr); 140 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 141 if (status == 0) 142 nfs_setattr_update_inode(inode, sattr); 143 dprintk("NFS reply setattr: %d\n", status); 144 return status; 145 } 146 147 static int 148 nfs_proc_lookup(struct inode *dir, struct qstr *name, 149 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 150 struct nfs4_label *label) 151 { 152 struct nfs_diropargs arg = { 153 .fh = NFS_FH(dir), 154 .name = name->name, 155 .len = name->len 156 }; 157 struct nfs_diropok res = { 158 .fh = fhandle, 159 .fattr = fattr 160 }; 161 struct rpc_message msg = { 162 .rpc_proc = &nfs_procedures[NFSPROC_LOOKUP], 163 .rpc_argp = &arg, 164 .rpc_resp = &res, 165 }; 166 int status; 167 168 dprintk("NFS call lookup %s\n", name->name); 169 nfs_fattr_init(fattr); 170 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 171 dprintk("NFS reply lookup: %d\n", status); 172 return status; 173 } 174 175 static int nfs_proc_readlink(struct inode *inode, struct page *page, 176 unsigned int pgbase, unsigned int pglen) 177 { 178 struct nfs_readlinkargs args = { 179 .fh = NFS_FH(inode), 180 .pgbase = pgbase, 181 .pglen = pglen, 182 .pages = &page 183 }; 184 struct rpc_message msg = { 185 .rpc_proc = &nfs_procedures[NFSPROC_READLINK], 186 .rpc_argp = &args, 187 }; 188 int status; 189 190 dprintk("NFS call readlink\n"); 191 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 192 dprintk("NFS reply readlink: %d\n", status); 193 return status; 194 } 195 196 struct nfs_createdata { 197 struct nfs_createargs arg; 198 struct nfs_diropok res; 199 struct nfs_fh fhandle; 200 struct nfs_fattr fattr; 201 }; 202 203 static struct nfs_createdata *nfs_alloc_createdata(struct inode *dir, 204 struct dentry *dentry, struct iattr *sattr) 205 { 206 struct nfs_createdata *data; 207 208 data = kmalloc(sizeof(*data), GFP_KERNEL); 209 210 if (data != NULL) { 211 data->arg.fh = NFS_FH(dir); 212 data->arg.name = dentry->d_name.name; 213 data->arg.len = dentry->d_name.len; 214 data->arg.sattr = sattr; 215 nfs_fattr_init(&data->fattr); 216 data->fhandle.size = 0; 217 data->res.fh = &data->fhandle; 218 data->res.fattr = &data->fattr; 219 } 220 return data; 221 }; 222 223 static void nfs_free_createdata(const struct nfs_createdata *data) 224 { 225 kfree(data); 226 } 227 228 static int 229 nfs_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 230 int flags) 231 { 232 struct nfs_createdata *data; 233 struct rpc_message msg = { 234 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 235 }; 236 int status = -ENOMEM; 237 238 dprintk("NFS call create %pd\n", dentry); 239 data = nfs_alloc_createdata(dir, dentry, sattr); 240 if (data == NULL) 241 goto out; 242 msg.rpc_argp = &data->arg; 243 msg.rpc_resp = &data->res; 244 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 245 nfs_mark_for_revalidate(dir); 246 if (status == 0) 247 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); 248 nfs_free_createdata(data); 249 out: 250 dprintk("NFS reply create: %d\n", status); 251 return status; 252 } 253 254 /* 255 * In NFSv2, mknod is grafted onto the create call. 256 */ 257 static int 258 nfs_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 259 dev_t rdev) 260 { 261 struct nfs_createdata *data; 262 struct rpc_message msg = { 263 .rpc_proc = &nfs_procedures[NFSPROC_CREATE], 264 }; 265 umode_t mode; 266 int status = -ENOMEM; 267 268 dprintk("NFS call mknod %pd\n", dentry); 269 270 mode = sattr->ia_mode; 271 if (S_ISFIFO(mode)) { 272 sattr->ia_mode = (mode & ~S_IFMT) | S_IFCHR; 273 sattr->ia_valid &= ~ATTR_SIZE; 274 } else if (S_ISCHR(mode) || S_ISBLK(mode)) { 275 sattr->ia_valid |= ATTR_SIZE; 276 sattr->ia_size = new_encode_dev(rdev);/* get out your barf bag */ 277 } 278 279 data = nfs_alloc_createdata(dir, dentry, sattr); 280 if (data == NULL) 281 goto out; 282 msg.rpc_argp = &data->arg; 283 msg.rpc_resp = &data->res; 284 285 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 286 nfs_mark_for_revalidate(dir); 287 288 if (status == -EINVAL && S_ISFIFO(mode)) { 289 sattr->ia_mode = mode; 290 nfs_fattr_init(data->res.fattr); 291 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 292 } 293 if (status == 0) 294 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); 295 nfs_free_createdata(data); 296 out: 297 dprintk("NFS reply mknod: %d\n", status); 298 return status; 299 } 300 301 static int 302 nfs_proc_remove(struct inode *dir, struct qstr *name) 303 { 304 struct nfs_removeargs arg = { 305 .fh = NFS_FH(dir), 306 .name = *name, 307 }; 308 struct rpc_message msg = { 309 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 310 .rpc_argp = &arg, 311 }; 312 int status; 313 314 dprintk("NFS call remove %s\n", name->name); 315 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 316 nfs_mark_for_revalidate(dir); 317 318 dprintk("NFS reply remove: %d\n", status); 319 return status; 320 } 321 322 static void 323 nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 324 { 325 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 326 } 327 328 static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 329 { 330 rpc_call_start(task); 331 } 332 333 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 334 { 335 nfs_mark_for_revalidate(dir); 336 return 1; 337 } 338 339 static void 340 nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 341 { 342 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; 343 } 344 345 static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 346 { 347 rpc_call_start(task); 348 } 349 350 static int 351 nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 352 struct inode *new_dir) 353 { 354 nfs_mark_for_revalidate(old_dir); 355 nfs_mark_for_revalidate(new_dir); 356 return 1; 357 } 358 359 static int 360 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 361 struct inode *new_dir, struct qstr *new_name) 362 { 363 struct nfs_renameargs arg = { 364 .old_dir = NFS_FH(old_dir), 365 .old_name = old_name, 366 .new_dir = NFS_FH(new_dir), 367 .new_name = new_name, 368 }; 369 struct rpc_message msg = { 370 .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 371 .rpc_argp = &arg, 372 }; 373 int status; 374 375 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 376 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 377 nfs_mark_for_revalidate(old_dir); 378 nfs_mark_for_revalidate(new_dir); 379 dprintk("NFS reply rename: %d\n", status); 380 return status; 381 } 382 383 static int 384 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 385 { 386 struct nfs_linkargs arg = { 387 .fromfh = NFS_FH(inode), 388 .tofh = NFS_FH(dir), 389 .toname = name->name, 390 .tolen = name->len 391 }; 392 struct rpc_message msg = { 393 .rpc_proc = &nfs_procedures[NFSPROC_LINK], 394 .rpc_argp = &arg, 395 }; 396 int status; 397 398 dprintk("NFS call link %s\n", name->name); 399 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 400 nfs_mark_for_revalidate(inode); 401 nfs_mark_for_revalidate(dir); 402 dprintk("NFS reply link: %d\n", status); 403 return status; 404 } 405 406 static int 407 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 408 unsigned int len, struct iattr *sattr) 409 { 410 struct nfs_fh *fh; 411 struct nfs_fattr *fattr; 412 struct nfs_symlinkargs arg = { 413 .fromfh = NFS_FH(dir), 414 .fromname = dentry->d_name.name, 415 .fromlen = dentry->d_name.len, 416 .pages = &page, 417 .pathlen = len, 418 .sattr = sattr 419 }; 420 struct rpc_message msg = { 421 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 422 .rpc_argp = &arg, 423 }; 424 int status = -ENAMETOOLONG; 425 426 dprintk("NFS call symlink %pd\n", dentry); 427 428 if (len > NFS2_MAXPATHLEN) 429 goto out; 430 431 fh = nfs_alloc_fhandle(); 432 fattr = nfs_alloc_fattr(); 433 status = -ENOMEM; 434 if (fh == NULL || fattr == NULL) 435 goto out_free; 436 437 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 438 nfs_mark_for_revalidate(dir); 439 440 /* 441 * V2 SYMLINK requests don't return any attributes. Setting the 442 * filehandle size to zero indicates to nfs_instantiate that it 443 * should fill in the data with a LOOKUP call on the wire. 444 */ 445 if (status == 0) 446 status = nfs_instantiate(dentry, fh, fattr, NULL); 447 448 out_free: 449 nfs_free_fattr(fattr); 450 nfs_free_fhandle(fh); 451 out: 452 dprintk("NFS reply symlink: %d\n", status); 453 return status; 454 } 455 456 static int 457 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 458 { 459 struct nfs_createdata *data; 460 struct rpc_message msg = { 461 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 462 }; 463 int status = -ENOMEM; 464 465 dprintk("NFS call mkdir %pd\n", dentry); 466 data = nfs_alloc_createdata(dir, dentry, sattr); 467 if (data == NULL) 468 goto out; 469 msg.rpc_argp = &data->arg; 470 msg.rpc_resp = &data->res; 471 472 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 473 nfs_mark_for_revalidate(dir); 474 if (status == 0) 475 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL); 476 nfs_free_createdata(data); 477 out: 478 dprintk("NFS reply mkdir: %d\n", status); 479 return status; 480 } 481 482 static int 483 nfs_proc_rmdir(struct inode *dir, struct qstr *name) 484 { 485 struct nfs_diropargs arg = { 486 .fh = NFS_FH(dir), 487 .name = name->name, 488 .len = name->len 489 }; 490 struct rpc_message msg = { 491 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 492 .rpc_argp = &arg, 493 }; 494 int status; 495 496 dprintk("NFS call rmdir %s\n", name->name); 497 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 498 nfs_mark_for_revalidate(dir); 499 dprintk("NFS reply rmdir: %d\n", status); 500 return status; 501 } 502 503 /* 504 * The READDIR implementation is somewhat hackish - we pass a temporary 505 * buffer to the encode function, which installs it in the receive 506 * the receive iovec. The decode function just parses the reply to make 507 * sure it is syntactically correct; the entries itself are decoded 508 * from nfs_readdir by calling the decode_entry function directly. 509 */ 510 static int 511 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 512 u64 cookie, struct page **pages, unsigned int count, int plus) 513 { 514 struct inode *dir = dentry->d_inode; 515 struct nfs_readdirargs arg = { 516 .fh = NFS_FH(dir), 517 .cookie = cookie, 518 .count = count, 519 .pages = pages, 520 }; 521 struct rpc_message msg = { 522 .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 523 .rpc_argp = &arg, 524 .rpc_cred = cred, 525 }; 526 int status; 527 528 dprintk("NFS call readdir %d\n", (unsigned int)cookie); 529 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 530 531 nfs_invalidate_atime(dir); 532 533 dprintk("NFS reply readdir: %d\n", status); 534 return status; 535 } 536 537 static int 538 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 539 struct nfs_fsstat *stat) 540 { 541 struct nfs2_fsstat fsinfo; 542 struct rpc_message msg = { 543 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 544 .rpc_argp = fhandle, 545 .rpc_resp = &fsinfo, 546 }; 547 int status; 548 549 dprintk("NFS call statfs\n"); 550 nfs_fattr_init(stat->fattr); 551 status = rpc_call_sync(server->client, &msg, 0); 552 dprintk("NFS reply statfs: %d\n", status); 553 if (status) 554 goto out; 555 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 556 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 557 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 558 stat->tfiles = 0; 559 stat->ffiles = 0; 560 stat->afiles = 0; 561 out: 562 return status; 563 } 564 565 static int 566 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 567 struct nfs_fsinfo *info) 568 { 569 struct nfs2_fsstat fsinfo; 570 struct rpc_message msg = { 571 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 572 .rpc_argp = fhandle, 573 .rpc_resp = &fsinfo, 574 }; 575 int status; 576 577 dprintk("NFS call fsinfo\n"); 578 nfs_fattr_init(info->fattr); 579 status = rpc_call_sync(server->client, &msg, 0); 580 dprintk("NFS reply fsinfo: %d\n", status); 581 if (status) 582 goto out; 583 info->rtmax = NFS_MAXDATA; 584 info->rtpref = fsinfo.tsize; 585 info->rtmult = fsinfo.bsize; 586 info->wtmax = NFS_MAXDATA; 587 info->wtpref = fsinfo.tsize; 588 info->wtmult = fsinfo.bsize; 589 info->dtpref = fsinfo.tsize; 590 info->maxfilesize = 0x7FFFFFFF; 591 info->lease_time = 0; 592 out: 593 return status; 594 } 595 596 static int 597 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 598 struct nfs_pathconf *info) 599 { 600 info->max_link = 0; 601 info->max_namelen = NFS2_MAXNAMLEN; 602 return 0; 603 } 604 605 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 606 { 607 struct inode *inode = data->header->inode; 608 609 nfs_invalidate_atime(inode); 610 if (task->tk_status >= 0) { 611 nfs_refresh_inode(inode, data->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 (data->args.offset + data->res.count >= data->res.fattr->size) 616 data->res.eof = 1; 617 } 618 return 0; 619 } 620 621 static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 622 { 623 msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 624 } 625 626 static int nfs_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data) 627 { 628 rpc_call_start(task); 629 return 0; 630 } 631 632 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 633 { 634 struct inode *inode = data->header->inode; 635 636 if (task->tk_status >= 0) 637 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); 638 return 0; 639 } 640 641 static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 642 { 643 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 644 data->args.stable = NFS_FILE_SYNC; 645 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 646 } 647 648 static int nfs_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) 649 { 650 rpc_call_start(task); 651 return 0; 652 } 653 654 static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 655 { 656 BUG(); 657 } 658 659 static void 660 nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 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); 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 flags) 698 { 699 return 0; 700 } 701 702 static int nfs_return_delegation(struct inode *inode) 703 { 704 nfs_wb_all(inode); 705 return 0; 706 } 707 708 static const struct inode_operations nfs_dir_inode_operations = { 709 .create = nfs_create, 710 .lookup = nfs_lookup, 711 .link = nfs_link, 712 .unlink = nfs_unlink, 713 .symlink = nfs_symlink, 714 .mkdir = nfs_mkdir, 715 .rmdir = nfs_rmdir, 716 .mknod = nfs_mknod, 717 .rename = nfs_rename, 718 .permission = nfs_permission, 719 .getattr = nfs_getattr, 720 .setattr = nfs_setattr, 721 }; 722 723 static const struct inode_operations nfs_file_inode_operations = { 724 .permission = nfs_permission, 725 .getattr = nfs_getattr, 726 .setattr = nfs_setattr, 727 }; 728 729 const struct nfs_rpc_ops nfs_v2_clientops = { 730 .version = 2, /* protocol version */ 731 .dentry_ops = &nfs_dentry_operations, 732 .dir_inode_ops = &nfs_dir_inode_operations, 733 .file_inode_ops = &nfs_file_inode_operations, 734 .file_ops = &nfs_file_operations, 735 .getroot = nfs_proc_get_root, 736 .submount = nfs_submount, 737 .try_mount = nfs_try_mount, 738 .getattr = nfs_proc_getattr, 739 .setattr = nfs_proc_setattr, 740 .lookup = nfs_proc_lookup, 741 .access = NULL, /* access */ 742 .readlink = nfs_proc_readlink, 743 .create = nfs_proc_create, 744 .remove = nfs_proc_remove, 745 .unlink_setup = nfs_proc_unlink_setup, 746 .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare, 747 .unlink_done = nfs_proc_unlink_done, 748 .rename = nfs_proc_rename, 749 .rename_setup = nfs_proc_rename_setup, 750 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare, 751 .rename_done = nfs_proc_rename_done, 752 .link = nfs_proc_link, 753 .symlink = nfs_proc_symlink, 754 .mkdir = nfs_proc_mkdir, 755 .rmdir = nfs_proc_rmdir, 756 .readdir = nfs_proc_readdir, 757 .mknod = nfs_proc_mknod, 758 .statfs = nfs_proc_statfs, 759 .fsinfo = nfs_proc_fsinfo, 760 .pathconf = nfs_proc_pathconf, 761 .decode_dirent = nfs2_decode_dirent, 762 .read_setup = nfs_proc_read_setup, 763 .read_pageio_init = nfs_pageio_init_read, 764 .read_rpc_prepare = nfs_proc_read_rpc_prepare, 765 .read_done = nfs_read_done, 766 .write_setup = nfs_proc_write_setup, 767 .write_pageio_init = nfs_pageio_init_write, 768 .write_rpc_prepare = nfs_proc_write_rpc_prepare, 769 .write_done = nfs_write_done, 770 .commit_setup = nfs_proc_commit_setup, 771 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare, 772 .lock = nfs_proc_lock, 773 .lock_check_bounds = nfs_lock_check_bounds, 774 .close_context = nfs_close_context, 775 .have_delegation = nfs_have_delegation, 776 .return_delegation = nfs_return_delegation, 777 .alloc_client = nfs_alloc_client, 778 .init_client = nfs_init_client, 779 .free_client = nfs_free_client, 780 .create_server = nfs_create_server, 781 .clone_server = nfs_clone_server, 782 }; 783