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 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) 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 = *name, 339 }; 340 struct rpc_message msg = { 341 .rpc_proc = &nfs_procedures[NFSPROC_REMOVE], 342 .rpc_argp = &arg, 343 }; 344 int status; 345 346 dprintk("NFS call remove %s\n", name->name); 347 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 348 nfs_mark_for_revalidate(dir); 349 350 dprintk("NFS reply remove: %d\n", status); 351 return status; 352 } 353 354 static void 355 nfs_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 356 { 357 msg->rpc_proc = &nfs_procedures[NFSPROC_REMOVE]; 358 } 359 360 static void nfs_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 361 { 362 rpc_call_start(task); 363 } 364 365 static int nfs_proc_unlink_done(struct rpc_task *task, struct inode *dir) 366 { 367 if (nfs_async_handle_expired_key(task)) 368 return 0; 369 nfs_mark_for_revalidate(dir); 370 return 1; 371 } 372 373 static void 374 nfs_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 375 { 376 msg->rpc_proc = &nfs_procedures[NFSPROC_RENAME]; 377 } 378 379 static void nfs_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 380 { 381 rpc_call_start(task); 382 } 383 384 static int 385 nfs_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 386 struct inode *new_dir) 387 { 388 if (nfs_async_handle_expired_key(task)) 389 return 0; 390 nfs_mark_for_revalidate(old_dir); 391 nfs_mark_for_revalidate(new_dir); 392 return 1; 393 } 394 395 static int 396 nfs_proc_rename(struct inode *old_dir, struct qstr *old_name, 397 struct inode *new_dir, struct qstr *new_name) 398 { 399 struct nfs_renameargs arg = { 400 .old_dir = NFS_FH(old_dir), 401 .old_name = old_name, 402 .new_dir = NFS_FH(new_dir), 403 .new_name = new_name, 404 }; 405 struct rpc_message msg = { 406 .rpc_proc = &nfs_procedures[NFSPROC_RENAME], 407 .rpc_argp = &arg, 408 }; 409 int status; 410 411 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name); 412 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); 413 nfs_mark_for_revalidate(old_dir); 414 nfs_mark_for_revalidate(new_dir); 415 dprintk("NFS reply rename: %d\n", status); 416 return status; 417 } 418 419 static int 420 nfs_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 421 { 422 struct nfs_linkargs arg = { 423 .fromfh = NFS_FH(inode), 424 .tofh = NFS_FH(dir), 425 .toname = name->name, 426 .tolen = name->len 427 }; 428 struct rpc_message msg = { 429 .rpc_proc = &nfs_procedures[NFSPROC_LINK], 430 .rpc_argp = &arg, 431 }; 432 int status; 433 434 dprintk("NFS call link %s\n", name->name); 435 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); 436 nfs_mark_for_revalidate(inode); 437 nfs_mark_for_revalidate(dir); 438 dprintk("NFS reply link: %d\n", status); 439 return status; 440 } 441 442 static int 443 nfs_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, 444 unsigned int len, struct iattr *sattr) 445 { 446 struct nfs_fh *fh; 447 struct nfs_fattr *fattr; 448 struct nfs_symlinkargs arg = { 449 .fromfh = NFS_FH(dir), 450 .fromname = dentry->d_name.name, 451 .fromlen = dentry->d_name.len, 452 .pages = &page, 453 .pathlen = len, 454 .sattr = sattr 455 }; 456 struct rpc_message msg = { 457 .rpc_proc = &nfs_procedures[NFSPROC_SYMLINK], 458 .rpc_argp = &arg, 459 }; 460 int status = -ENAMETOOLONG; 461 462 dprintk("NFS call symlink %s\n", dentry->d_name.name); 463 464 if (len > NFS2_MAXPATHLEN) 465 goto out; 466 467 fh = nfs_alloc_fhandle(); 468 fattr = nfs_alloc_fattr(); 469 status = -ENOMEM; 470 if (fh == NULL || fattr == NULL) 471 goto out_free; 472 473 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 474 nfs_mark_for_revalidate(dir); 475 476 /* 477 * V2 SYMLINK requests don't return any attributes. Setting the 478 * filehandle size to zero indicates to nfs_instantiate that it 479 * should fill in the data with a LOOKUP call on the wire. 480 */ 481 if (status == 0) 482 status = nfs_instantiate(dentry, fh, fattr); 483 484 out_free: 485 nfs_free_fattr(fattr); 486 nfs_free_fhandle(fh); 487 out: 488 dprintk("NFS reply symlink: %d\n", status); 489 return status; 490 } 491 492 static int 493 nfs_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) 494 { 495 struct nfs_createdata *data; 496 struct rpc_message msg = { 497 .rpc_proc = &nfs_procedures[NFSPROC_MKDIR], 498 }; 499 int status = -ENOMEM; 500 501 dprintk("NFS call mkdir %s\n", dentry->d_name.name); 502 data = nfs_alloc_createdata(dir, dentry, sattr); 503 if (data == NULL) 504 goto out; 505 msg.rpc_argp = &data->arg; 506 msg.rpc_resp = &data->res; 507 508 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 509 nfs_mark_for_revalidate(dir); 510 if (status == 0) 511 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 512 nfs_free_createdata(data); 513 out: 514 dprintk("NFS reply mkdir: %d\n", status); 515 return status; 516 } 517 518 static int 519 nfs_proc_rmdir(struct inode *dir, struct qstr *name) 520 { 521 struct nfs_diropargs arg = { 522 .fh = NFS_FH(dir), 523 .name = name->name, 524 .len = name->len 525 }; 526 struct rpc_message msg = { 527 .rpc_proc = &nfs_procedures[NFSPROC_RMDIR], 528 .rpc_argp = &arg, 529 }; 530 int status; 531 532 dprintk("NFS call rmdir %s\n", name->name); 533 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 534 nfs_mark_for_revalidate(dir); 535 dprintk("NFS reply rmdir: %d\n", status); 536 return status; 537 } 538 539 /* 540 * The READDIR implementation is somewhat hackish - we pass a temporary 541 * buffer to the encode function, which installs it in the receive 542 * the receive iovec. The decode function just parses the reply to make 543 * sure it is syntactically correct; the entries itself are decoded 544 * from nfs_readdir by calling the decode_entry function directly. 545 */ 546 static int 547 nfs_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 548 u64 cookie, struct page **pages, unsigned int count, int plus) 549 { 550 struct inode *dir = dentry->d_inode; 551 struct nfs_readdirargs arg = { 552 .fh = NFS_FH(dir), 553 .cookie = cookie, 554 .count = count, 555 .pages = pages, 556 }; 557 struct rpc_message msg = { 558 .rpc_proc = &nfs_procedures[NFSPROC_READDIR], 559 .rpc_argp = &arg, 560 .rpc_cred = cred, 561 }; 562 int status; 563 564 dprintk("NFS call readdir %d\n", (unsigned int)cookie); 565 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); 566 567 nfs_invalidate_atime(dir); 568 569 dprintk("NFS reply readdir: %d\n", status); 570 return status; 571 } 572 573 static int 574 nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 575 struct nfs_fsstat *stat) 576 { 577 struct nfs2_fsstat fsinfo; 578 struct rpc_message msg = { 579 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 580 .rpc_argp = fhandle, 581 .rpc_resp = &fsinfo, 582 }; 583 int status; 584 585 dprintk("NFS call statfs\n"); 586 nfs_fattr_init(stat->fattr); 587 status = rpc_call_sync(server->client, &msg, 0); 588 dprintk("NFS reply statfs: %d\n", status); 589 if (status) 590 goto out; 591 stat->tbytes = (u64)fsinfo.blocks * fsinfo.bsize; 592 stat->fbytes = (u64)fsinfo.bfree * fsinfo.bsize; 593 stat->abytes = (u64)fsinfo.bavail * fsinfo.bsize; 594 stat->tfiles = 0; 595 stat->ffiles = 0; 596 stat->afiles = 0; 597 out: 598 return status; 599 } 600 601 static int 602 nfs_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 603 struct nfs_fsinfo *info) 604 { 605 struct nfs2_fsstat fsinfo; 606 struct rpc_message msg = { 607 .rpc_proc = &nfs_procedures[NFSPROC_STATFS], 608 .rpc_argp = fhandle, 609 .rpc_resp = &fsinfo, 610 }; 611 int status; 612 613 dprintk("NFS call fsinfo\n"); 614 nfs_fattr_init(info->fattr); 615 status = rpc_call_sync(server->client, &msg, 0); 616 dprintk("NFS reply fsinfo: %d\n", status); 617 if (status) 618 goto out; 619 info->rtmax = NFS_MAXDATA; 620 info->rtpref = fsinfo.tsize; 621 info->rtmult = fsinfo.bsize; 622 info->wtmax = NFS_MAXDATA; 623 info->wtpref = fsinfo.tsize; 624 info->wtmult = fsinfo.bsize; 625 info->dtpref = fsinfo.tsize; 626 info->maxfilesize = 0x7FFFFFFF; 627 info->lease_time = 0; 628 out: 629 return status; 630 } 631 632 static int 633 nfs_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 634 struct nfs_pathconf *info) 635 { 636 info->max_link = 0; 637 info->max_namelen = NFS2_MAXNAMLEN; 638 return 0; 639 } 640 641 static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data) 642 { 643 struct inode *inode = data->header->inode; 644 645 if (nfs_async_handle_expired_key(task)) 646 return -EAGAIN; 647 648 nfs_invalidate_atime(inode); 649 if (task->tk_status >= 0) { 650 nfs_refresh_inode(inode, data->res.fattr); 651 /* Emulate the eof flag, which isn't normally needed in NFSv2 652 * as it is guaranteed to always return the file attributes 653 */ 654 if (data->args.offset + data->res.count >= data->res.fattr->size) 655 data->res.eof = 1; 656 } 657 return 0; 658 } 659 660 static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 661 { 662 msg->rpc_proc = &nfs_procedures[NFSPROC_READ]; 663 } 664 665 static void nfs_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data) 666 { 667 rpc_call_start(task); 668 } 669 670 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data) 671 { 672 struct inode *inode = data->header->inode; 673 674 if (nfs_async_handle_expired_key(task)) 675 return -EAGAIN; 676 677 if (task->tk_status >= 0) 678 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); 679 return 0; 680 } 681 682 static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 683 { 684 /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */ 685 data->args.stable = NFS_FILE_SYNC; 686 msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE]; 687 } 688 689 static void nfs_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) 690 { 691 rpc_call_start(task); 692 } 693 694 static void nfs_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 695 { 696 BUG(); 697 } 698 699 static void 700 nfs_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 701 { 702 BUG(); 703 } 704 705 static int 706 nfs_proc_lock(struct file *filp, int cmd, struct file_lock *fl) 707 { 708 struct inode *inode = filp->f_path.dentry->d_inode; 709 710 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl); 711 } 712 713 /* Helper functions for NFS lock bounds checking */ 714 #define NFS_LOCK32_OFFSET_MAX ((__s32)0x7fffffffUL) 715 static int nfs_lock_check_bounds(const struct file_lock *fl) 716 { 717 __s32 start, end; 718 719 start = (__s32)fl->fl_start; 720 if ((loff_t)start != fl->fl_start) 721 goto out_einval; 722 723 if (fl->fl_end != OFFSET_MAX) { 724 end = (__s32)fl->fl_end; 725 if ((loff_t)end != fl->fl_end) 726 goto out_einval; 727 } else 728 end = NFS_LOCK32_OFFSET_MAX; 729 730 if (start < 0 || start > end) 731 goto out_einval; 732 return 0; 733 out_einval: 734 return -EINVAL; 735 } 736 737 static int nfs_have_delegation(struct inode *inode, fmode_t flags) 738 { 739 return 0; 740 } 741 742 static int nfs_return_delegation(struct inode *inode) 743 { 744 nfs_wb_all(inode); 745 return 0; 746 } 747 748 static const struct inode_operations nfs_dir_inode_operations = { 749 .create = nfs_create, 750 .lookup = nfs_lookup, 751 .link = nfs_link, 752 .unlink = nfs_unlink, 753 .symlink = nfs_symlink, 754 .mkdir = nfs_mkdir, 755 .rmdir = nfs_rmdir, 756 .mknod = nfs_mknod, 757 .rename = nfs_rename, 758 .permission = nfs_permission, 759 .getattr = nfs_getattr, 760 .setattr = nfs_setattr, 761 }; 762 763 static const struct inode_operations nfs_file_inode_operations = { 764 .permission = nfs_permission, 765 .getattr = nfs_getattr, 766 .setattr = nfs_setattr, 767 }; 768 769 const struct nfs_rpc_ops nfs_v2_clientops = { 770 .version = 2, /* protocol version */ 771 .dentry_ops = &nfs_dentry_operations, 772 .dir_inode_ops = &nfs_dir_inode_operations, 773 .file_inode_ops = &nfs_file_inode_operations, 774 .file_ops = &nfs_file_operations, 775 .getroot = nfs_proc_get_root, 776 .submount = nfs_submount, 777 .try_mount = nfs_try_mount, 778 .getattr = nfs_proc_getattr, 779 .setattr = nfs_proc_setattr, 780 .lookup = nfs_proc_lookup, 781 .access = NULL, /* access */ 782 .readlink = nfs_proc_readlink, 783 .create = nfs_proc_create, 784 .remove = nfs_proc_remove, 785 .unlink_setup = nfs_proc_unlink_setup, 786 .unlink_rpc_prepare = nfs_proc_unlink_rpc_prepare, 787 .unlink_done = nfs_proc_unlink_done, 788 .rename = nfs_proc_rename, 789 .rename_setup = nfs_proc_rename_setup, 790 .rename_rpc_prepare = nfs_proc_rename_rpc_prepare, 791 .rename_done = nfs_proc_rename_done, 792 .link = nfs_proc_link, 793 .symlink = nfs_proc_symlink, 794 .mkdir = nfs_proc_mkdir, 795 .rmdir = nfs_proc_rmdir, 796 .readdir = nfs_proc_readdir, 797 .mknod = nfs_proc_mknod, 798 .statfs = nfs_proc_statfs, 799 .fsinfo = nfs_proc_fsinfo, 800 .pathconf = nfs_proc_pathconf, 801 .decode_dirent = nfs2_decode_dirent, 802 .read_setup = nfs_proc_read_setup, 803 .read_pageio_init = nfs_pageio_init_read, 804 .read_rpc_prepare = nfs_proc_read_rpc_prepare, 805 .read_done = nfs_read_done, 806 .write_setup = nfs_proc_write_setup, 807 .write_pageio_init = nfs_pageio_init_write, 808 .write_rpc_prepare = nfs_proc_write_rpc_prepare, 809 .write_done = nfs_write_done, 810 .commit_setup = nfs_proc_commit_setup, 811 .commit_rpc_prepare = nfs_proc_commit_rpc_prepare, 812 .lock = nfs_proc_lock, 813 .lock_check_bounds = nfs_lock_check_bounds, 814 .close_context = nfs_close_context, 815 .have_delegation = nfs_have_delegation, 816 .return_delegation = nfs_return_delegation, 817 .alloc_client = nfs_alloc_client, 818 .init_client = nfs_init_client, 819 .free_client = nfs_free_client, 820 }; 821