1 /* 2 * Syscall interface to knfsd. 3 * 4 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 5 */ 6 7 #include <linux/slab.h> 8 #include <linux/namei.h> 9 #include <linux/ctype.h> 10 11 #include <linux/sunrpc/svcsock.h> 12 #include <linux/nfsd/syscall.h> 13 #include <linux/lockd/lockd.h> 14 #include <linux/sunrpc/clnt.h> 15 16 #include "idmap.h" 17 #include "nfsd.h" 18 #include "cache.h" 19 20 /* 21 * We have a single directory with 9 nodes in it. 22 */ 23 enum { 24 NFSD_Root = 1, 25 #ifdef CONFIG_NFSD_DEPRECATED 26 NFSD_Svc, 27 NFSD_Add, 28 NFSD_Del, 29 NFSD_Export, 30 NFSD_Unexport, 31 NFSD_Getfd, 32 NFSD_Getfs, 33 #endif 34 NFSD_List, 35 NFSD_Export_features, 36 NFSD_Fh, 37 NFSD_FO_UnlockIP, 38 NFSD_FO_UnlockFS, 39 NFSD_Threads, 40 NFSD_Pool_Threads, 41 NFSD_Pool_Stats, 42 NFSD_Versions, 43 NFSD_Ports, 44 NFSD_MaxBlkSize, 45 /* 46 * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 47 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 48 */ 49 #ifdef CONFIG_NFSD_V4 50 NFSD_Leasetime, 51 NFSD_Gracetime, 52 NFSD_RecoveryDir, 53 #endif 54 }; 55 56 /* 57 * write() for these nodes. 58 */ 59 #ifdef CONFIG_NFSD_DEPRECATED 60 static ssize_t write_svc(struct file *file, char *buf, size_t size); 61 static ssize_t write_add(struct file *file, char *buf, size_t size); 62 static ssize_t write_del(struct file *file, char *buf, size_t size); 63 static ssize_t write_export(struct file *file, char *buf, size_t size); 64 static ssize_t write_unexport(struct file *file, char *buf, size_t size); 65 static ssize_t write_getfd(struct file *file, char *buf, size_t size); 66 static ssize_t write_getfs(struct file *file, char *buf, size_t size); 67 #endif 68 static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 69 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 70 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 71 static ssize_t write_threads(struct file *file, char *buf, size_t size); 72 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 73 static ssize_t write_versions(struct file *file, char *buf, size_t size); 74 static ssize_t write_ports(struct file *file, char *buf, size_t size); 75 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 76 #ifdef CONFIG_NFSD_V4 77 static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 78 static ssize_t write_gracetime(struct file *file, char *buf, size_t size); 79 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 80 #endif 81 82 static ssize_t (*write_op[])(struct file *, char *, size_t) = { 83 #ifdef CONFIG_NFSD_DEPRECATED 84 [NFSD_Svc] = write_svc, 85 [NFSD_Add] = write_add, 86 [NFSD_Del] = write_del, 87 [NFSD_Export] = write_export, 88 [NFSD_Unexport] = write_unexport, 89 [NFSD_Getfd] = write_getfd, 90 [NFSD_Getfs] = write_getfs, 91 #endif 92 [NFSD_Fh] = write_filehandle, 93 [NFSD_FO_UnlockIP] = write_unlock_ip, 94 [NFSD_FO_UnlockFS] = write_unlock_fs, 95 [NFSD_Threads] = write_threads, 96 [NFSD_Pool_Threads] = write_pool_threads, 97 [NFSD_Versions] = write_versions, 98 [NFSD_Ports] = write_ports, 99 [NFSD_MaxBlkSize] = write_maxblksize, 100 #ifdef CONFIG_NFSD_V4 101 [NFSD_Leasetime] = write_leasetime, 102 [NFSD_Gracetime] = write_gracetime, 103 [NFSD_RecoveryDir] = write_recoverydir, 104 #endif 105 }; 106 107 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 108 { 109 ino_t ino = file->f_path.dentry->d_inode->i_ino; 110 char *data; 111 ssize_t rv; 112 113 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 114 return -EINVAL; 115 116 data = simple_transaction_get(file, buf, size); 117 if (IS_ERR(data)) 118 return PTR_ERR(data); 119 120 rv = write_op[ino](file, data, size); 121 if (rv >= 0) { 122 simple_transaction_set(file, rv); 123 rv = size; 124 } 125 return rv; 126 } 127 128 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 129 { 130 #ifdef CONFIG_NFSD_DEPRECATED 131 static int warned; 132 if (file->f_dentry->d_name.name[0] == '.' && !warned) { 133 printk(KERN_INFO 134 "Warning: \"%s\" uses deprecated NFSD interface: %s." 135 " This will be removed in 2.6.40\n", 136 current->comm, file->f_dentry->d_name.name); 137 warned = 1; 138 } 139 #endif 140 if (! file->private_data) { 141 /* An attempt to read a transaction file without writing 142 * causes a 0-byte write so that the file can return 143 * state information 144 */ 145 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 146 if (rv < 0) 147 return rv; 148 } 149 return simple_transaction_read(file, buf, size, pos); 150 } 151 152 static const struct file_operations transaction_ops = { 153 .write = nfsctl_transaction_write, 154 .read = nfsctl_transaction_read, 155 .release = simple_transaction_release, 156 .llseek = default_llseek, 157 }; 158 159 static int exports_open(struct inode *inode, struct file *file) 160 { 161 return seq_open(file, &nfs_exports_op); 162 } 163 164 static const struct file_operations exports_operations = { 165 .open = exports_open, 166 .read = seq_read, 167 .llseek = seq_lseek, 168 .release = seq_release, 169 .owner = THIS_MODULE, 170 }; 171 172 static int export_features_show(struct seq_file *m, void *v) 173 { 174 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 175 return 0; 176 } 177 178 static int export_features_open(struct inode *inode, struct file *file) 179 { 180 return single_open(file, export_features_show, NULL); 181 } 182 183 static struct file_operations export_features_operations = { 184 .open = export_features_open, 185 .read = seq_read, 186 .llseek = seq_lseek, 187 .release = single_release, 188 }; 189 190 extern int nfsd_pool_stats_open(struct inode *inode, struct file *file); 191 extern int nfsd_pool_stats_release(struct inode *inode, struct file *file); 192 193 static const struct file_operations pool_stats_operations = { 194 .open = nfsd_pool_stats_open, 195 .read = seq_read, 196 .llseek = seq_lseek, 197 .release = nfsd_pool_stats_release, 198 .owner = THIS_MODULE, 199 }; 200 201 /*----------------------------------------------------------------------------*/ 202 /* 203 * payload - write methods 204 */ 205 206 #ifdef CONFIG_NFSD_DEPRECATED 207 /** 208 * write_svc - Start kernel's NFSD server 209 * 210 * Deprecated. /proc/fs/nfsd/threads is preferred. 211 * Function remains to support old versions of nfs-utils. 212 * 213 * Input: 214 * buf: struct nfsctl_svc 215 * svc_port: port number of this 216 * server's listener 217 * svc_nthreads: number of threads to start 218 * size: size in bytes of passed in nfsctl_svc 219 * Output: 220 * On success: returns zero 221 * On error: return code is negative errno value 222 */ 223 static ssize_t write_svc(struct file *file, char *buf, size_t size) 224 { 225 struct nfsctl_svc *data; 226 int err; 227 if (size < sizeof(*data)) 228 return -EINVAL; 229 data = (struct nfsctl_svc*) buf; 230 err = nfsd_svc(data->svc_port, data->svc_nthreads); 231 if (err < 0) 232 return err; 233 return 0; 234 } 235 236 /** 237 * write_add - Add or modify client entry in auth unix cache 238 * 239 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 240 * Function remains to support old versions of nfs-utils. 241 * 242 * Input: 243 * buf: struct nfsctl_client 244 * cl_ident: '\0'-terminated C string 245 * containing domain name 246 * of client 247 * cl_naddr: no. of items in cl_addrlist 248 * cl_addrlist: array of client addresses 249 * cl_fhkeytype: ignored 250 * cl_fhkeylen: ignored 251 * cl_fhkey: ignored 252 * size: size in bytes of passed in nfsctl_client 253 * Output: 254 * On success: returns zero 255 * On error: return code is negative errno value 256 * 257 * Note: Only AF_INET client addresses are passed in, since 258 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 259 */ 260 static ssize_t write_add(struct file *file, char *buf, size_t size) 261 { 262 struct nfsctl_client *data; 263 if (size < sizeof(*data)) 264 return -EINVAL; 265 data = (struct nfsctl_client *)buf; 266 return exp_addclient(data); 267 } 268 269 /** 270 * write_del - Remove client from auth unix cache 271 * 272 * Deprecated. /proc/net/rpc/auth.unix.ip is preferred. 273 * Function remains to support old versions of nfs-utils. 274 * 275 * Input: 276 * buf: struct nfsctl_client 277 * cl_ident: '\0'-terminated C string 278 * containing domain name 279 * of client 280 * cl_naddr: ignored 281 * cl_addrlist: ignored 282 * cl_fhkeytype: ignored 283 * cl_fhkeylen: ignored 284 * cl_fhkey: ignored 285 * size: size in bytes of passed in nfsctl_client 286 * Output: 287 * On success: returns zero 288 * On error: return code is negative errno value 289 * 290 * Note: Only AF_INET client addresses are passed in, since 291 * nfsctl_client.cl_addrlist contains only in_addr fields for addresses. 292 */ 293 static ssize_t write_del(struct file *file, char *buf, size_t size) 294 { 295 struct nfsctl_client *data; 296 if (size < sizeof(*data)) 297 return -EINVAL; 298 data = (struct nfsctl_client *)buf; 299 return exp_delclient(data); 300 } 301 302 /** 303 * write_export - Export part or all of a local file system 304 * 305 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 306 * Function remains to support old versions of nfs-utils. 307 * 308 * Input: 309 * buf: struct nfsctl_export 310 * ex_client: '\0'-terminated C string 311 * containing domain name 312 * of client allowed to access 313 * this export 314 * ex_path: '\0'-terminated C string 315 * containing pathname of 316 * directory in local file system 317 * ex_dev: fsid to use for this export 318 * ex_ino: ignored 319 * ex_flags: export flags for this export 320 * ex_anon_uid: UID to use for anonymous 321 * requests 322 * ex_anon_gid: GID to use for anonymous 323 * requests 324 * size: size in bytes of passed in nfsctl_export 325 * Output: 326 * On success: returns zero 327 * On error: return code is negative errno value 328 */ 329 static ssize_t write_export(struct file *file, char *buf, size_t size) 330 { 331 struct nfsctl_export *data; 332 if (size < sizeof(*data)) 333 return -EINVAL; 334 data = (struct nfsctl_export*)buf; 335 return exp_export(data); 336 } 337 338 /** 339 * write_unexport - Unexport a previously exported file system 340 * 341 * Deprecated. /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred. 342 * Function remains to support old versions of nfs-utils. 343 * 344 * Input: 345 * buf: struct nfsctl_export 346 * ex_client: '\0'-terminated C string 347 * containing domain name 348 * of client no longer allowed 349 * to access this export 350 * ex_path: '\0'-terminated C string 351 * containing pathname of 352 * directory in local file system 353 * ex_dev: ignored 354 * ex_ino: ignored 355 * ex_flags: ignored 356 * ex_anon_uid: ignored 357 * ex_anon_gid: ignored 358 * size: size in bytes of passed in nfsctl_export 359 * Output: 360 * On success: returns zero 361 * On error: return code is negative errno value 362 */ 363 static ssize_t write_unexport(struct file *file, char *buf, size_t size) 364 { 365 struct nfsctl_export *data; 366 367 if (size < sizeof(*data)) 368 return -EINVAL; 369 data = (struct nfsctl_export*)buf; 370 return exp_unexport(data); 371 } 372 373 /** 374 * write_getfs - Get a variable-length NFS file handle by path 375 * 376 * Deprecated. /proc/fs/nfsd/filehandle is preferred. 377 * Function remains to support old versions of nfs-utils. 378 * 379 * Input: 380 * buf: struct nfsctl_fsparm 381 * gd_addr: socket address of client 382 * gd_path: '\0'-terminated C string 383 * containing pathname of 384 * directory in local file system 385 * gd_maxlen: maximum size of returned file 386 * handle 387 * size: size in bytes of passed in nfsctl_fsparm 388 * Output: 389 * On success: passed-in buffer filled with a knfsd_fh structure 390 * (a variable-length raw NFS file handle); 391 * return code is the size in bytes of the file handle 392 * On error: return code is negative errno value 393 * 394 * Note: Only AF_INET client addresses are passed in, since gd_addr 395 * is the same size as a struct sockaddr_in. 396 */ 397 static ssize_t write_getfs(struct file *file, char *buf, size_t size) 398 { 399 struct nfsctl_fsparm *data; 400 struct sockaddr_in *sin; 401 struct auth_domain *clp; 402 int err = 0; 403 struct knfsd_fh *res; 404 struct in6_addr in6; 405 406 if (size < sizeof(*data)) 407 return -EINVAL; 408 data = (struct nfsctl_fsparm*)buf; 409 err = -EPROTONOSUPPORT; 410 if (data->gd_addr.sa_family != AF_INET) 411 goto out; 412 sin = (struct sockaddr_in *)&data->gd_addr; 413 if (data->gd_maxlen > NFS3_FHSIZE) 414 data->gd_maxlen = NFS3_FHSIZE; 415 416 res = (struct knfsd_fh*)buf; 417 418 exp_readlock(); 419 420 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 421 422 clp = auth_unix_lookup(&init_net, &in6); 423 if (!clp) 424 err = -EPERM; 425 else { 426 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); 427 auth_domain_put(clp); 428 } 429 exp_readunlock(); 430 if (err == 0) 431 err = res->fh_size + offsetof(struct knfsd_fh, fh_base); 432 out: 433 return err; 434 } 435 436 /** 437 * write_getfd - Get a fixed-length NFS file handle by path (used by mountd) 438 * 439 * Deprecated. /proc/fs/nfsd/filehandle is preferred. 440 * Function remains to support old versions of nfs-utils. 441 * 442 * Input: 443 * buf: struct nfsctl_fdparm 444 * gd_addr: socket address of client 445 * gd_path: '\0'-terminated C string 446 * containing pathname of 447 * directory in local file system 448 * gd_version: fdparm structure version 449 * size: size in bytes of passed in nfsctl_fdparm 450 * Output: 451 * On success: passed-in buffer filled with nfsctl_res 452 * (a fixed-length raw NFS file handle); 453 * return code is the size in bytes of the file handle 454 * On error: return code is negative errno value 455 * 456 * Note: Only AF_INET client addresses are passed in, since gd_addr 457 * is the same size as a struct sockaddr_in. 458 */ 459 static ssize_t write_getfd(struct file *file, char *buf, size_t size) 460 { 461 struct nfsctl_fdparm *data; 462 struct sockaddr_in *sin; 463 struct auth_domain *clp; 464 int err = 0; 465 struct knfsd_fh fh; 466 char *res; 467 struct in6_addr in6; 468 469 if (size < sizeof(*data)) 470 return -EINVAL; 471 data = (struct nfsctl_fdparm*)buf; 472 err = -EPROTONOSUPPORT; 473 if (data->gd_addr.sa_family != AF_INET) 474 goto out; 475 err = -EINVAL; 476 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) 477 goto out; 478 479 res = buf; 480 sin = (struct sockaddr_in *)&data->gd_addr; 481 exp_readlock(); 482 483 ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6); 484 485 clp = auth_unix_lookup(&init_net, &in6); 486 if (!clp) 487 err = -EPERM; 488 else { 489 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); 490 auth_domain_put(clp); 491 } 492 exp_readunlock(); 493 494 if (err == 0) { 495 memset(res,0, NFS_FHSIZE); 496 memcpy(res, &fh.fh_base, fh.fh_size); 497 err = NFS_FHSIZE; 498 } 499 out: 500 return err; 501 } 502 #endif /* CONFIG_NFSD_DEPRECATED */ 503 504 /** 505 * write_unlock_ip - Release all locks used by a client 506 * 507 * Experimental. 508 * 509 * Input: 510 * buf: '\n'-terminated C string containing a 511 * presentation format IP address 512 * size: length of C string in @buf 513 * Output: 514 * On success: returns zero if all specified locks were released; 515 * returns one if one or more locks were not released 516 * On error: return code is negative errno value 517 */ 518 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 519 { 520 struct sockaddr_storage address; 521 struct sockaddr *sap = (struct sockaddr *)&address; 522 size_t salen = sizeof(address); 523 char *fo_path; 524 525 /* sanity check */ 526 if (size == 0) 527 return -EINVAL; 528 529 if (buf[size-1] != '\n') 530 return -EINVAL; 531 532 fo_path = buf; 533 if (qword_get(&buf, fo_path, size) < 0) 534 return -EINVAL; 535 536 if (rpc_pton(fo_path, size, sap, salen) == 0) 537 return -EINVAL; 538 539 return nlmsvc_unlock_all_by_ip(sap); 540 } 541 542 /** 543 * write_unlock_fs - Release all locks on a local file system 544 * 545 * Experimental. 546 * 547 * Input: 548 * buf: '\n'-terminated C string containing the 549 * absolute pathname of a local file system 550 * size: length of C string in @buf 551 * Output: 552 * On success: returns zero if all specified locks were released; 553 * returns one if one or more locks were not released 554 * On error: return code is negative errno value 555 */ 556 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 557 { 558 struct path path; 559 char *fo_path; 560 int error; 561 562 /* sanity check */ 563 if (size == 0) 564 return -EINVAL; 565 566 if (buf[size-1] != '\n') 567 return -EINVAL; 568 569 fo_path = buf; 570 if (qword_get(&buf, fo_path, size) < 0) 571 return -EINVAL; 572 573 error = kern_path(fo_path, 0, &path); 574 if (error) 575 return error; 576 577 /* 578 * XXX: Needs better sanity checking. Otherwise we could end up 579 * releasing locks on the wrong file system. 580 * 581 * For example: 582 * 1. Does the path refer to a directory? 583 * 2. Is that directory a mount point, or 584 * 3. Is that directory the root of an exported file system? 585 */ 586 error = nlmsvc_unlock_all_by_sb(path.mnt->mnt_sb); 587 588 path_put(&path); 589 return error; 590 } 591 592 /** 593 * write_filehandle - Get a variable-length NFS file handle by path 594 * 595 * On input, the buffer contains a '\n'-terminated C string comprised of 596 * three alphanumeric words separated by whitespace. The string may 597 * contain escape sequences. 598 * 599 * Input: 600 * buf: 601 * domain: client domain name 602 * path: export pathname 603 * maxsize: numeric maximum size of 604 * @buf 605 * size: length of C string in @buf 606 * Output: 607 * On success: passed-in buffer filled with '\n'-terminated C 608 * string containing a ASCII hex text version 609 * of the NFS file handle; 610 * return code is the size in bytes of the string 611 * On error: return code is negative errno value 612 */ 613 static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 614 { 615 char *dname, *path; 616 int uninitialized_var(maxsize); 617 char *mesg = buf; 618 int len; 619 struct auth_domain *dom; 620 struct knfsd_fh fh; 621 622 if (size == 0) 623 return -EINVAL; 624 625 if (buf[size-1] != '\n') 626 return -EINVAL; 627 buf[size-1] = 0; 628 629 dname = mesg; 630 len = qword_get(&mesg, dname, size); 631 if (len <= 0) 632 return -EINVAL; 633 634 path = dname+len+1; 635 len = qword_get(&mesg, path, size); 636 if (len <= 0) 637 return -EINVAL; 638 639 len = get_int(&mesg, &maxsize); 640 if (len) 641 return len; 642 643 if (maxsize < NFS_FHSIZE) 644 return -EINVAL; 645 if (maxsize > NFS3_FHSIZE) 646 maxsize = NFS3_FHSIZE; 647 648 if (qword_get(&mesg, mesg, size)>0) 649 return -EINVAL; 650 651 /* we have all the words, they are in buf.. */ 652 dom = unix_domain_find(dname); 653 if (!dom) 654 return -ENOMEM; 655 656 len = exp_rootfh(dom, path, &fh, maxsize); 657 auth_domain_put(dom); 658 if (len) 659 return len; 660 661 mesg = buf; 662 len = SIMPLE_TRANSACTION_LIMIT; 663 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 664 mesg[-1] = '\n'; 665 return mesg - buf; 666 } 667 668 /** 669 * write_threads - Start NFSD, or report the current number of running threads 670 * 671 * Input: 672 * buf: ignored 673 * size: zero 674 * Output: 675 * On success: passed-in buffer filled with '\n'-terminated C 676 * string numeric value representing the number of 677 * running NFSD threads; 678 * return code is the size in bytes of the string 679 * On error: return code is zero 680 * 681 * OR 682 * 683 * Input: 684 * buf: C string containing an unsigned 685 * integer value representing the 686 * number of NFSD threads to start 687 * size: non-zero length of C string in @buf 688 * Output: 689 * On success: NFS service is started; 690 * passed-in buffer filled with '\n'-terminated C 691 * string numeric value representing the number of 692 * running NFSD threads; 693 * return code is the size in bytes of the string 694 * On error: return code is zero or a negative errno value 695 */ 696 static ssize_t write_threads(struct file *file, char *buf, size_t size) 697 { 698 char *mesg = buf; 699 int rv; 700 if (size > 0) { 701 int newthreads; 702 rv = get_int(&mesg, &newthreads); 703 if (rv) 704 return rv; 705 if (newthreads < 0) 706 return -EINVAL; 707 rv = nfsd_svc(NFS_PORT, newthreads); 708 if (rv < 0) 709 return rv; 710 } else 711 rv = nfsd_nrthreads(); 712 713 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 714 } 715 716 /** 717 * write_pool_threads - Set or report the current number of threads per pool 718 * 719 * Input: 720 * buf: ignored 721 * size: zero 722 * 723 * OR 724 * 725 * Input: 726 * buf: C string containing whitespace- 727 * separated unsigned integer values 728 * representing the number of NFSD 729 * threads to start in each pool 730 * size: non-zero length of C string in @buf 731 * Output: 732 * On success: passed-in buffer filled with '\n'-terminated C 733 * string containing integer values representing the 734 * number of NFSD threads in each pool; 735 * return code is the size in bytes of the string 736 * On error: return code is zero or a negative errno value 737 */ 738 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 739 { 740 /* if size > 0, look for an array of number of threads per node 741 * and apply them then write out number of threads per node as reply 742 */ 743 char *mesg = buf; 744 int i; 745 int rv; 746 int len; 747 int npools; 748 int *nthreads; 749 750 mutex_lock(&nfsd_mutex); 751 npools = nfsd_nrpools(); 752 if (npools == 0) { 753 /* 754 * NFS is shut down. The admin can start it by 755 * writing to the threads file but NOT the pool_threads 756 * file, sorry. Report zero threads. 757 */ 758 mutex_unlock(&nfsd_mutex); 759 strcpy(buf, "0\n"); 760 return strlen(buf); 761 } 762 763 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 764 rv = -ENOMEM; 765 if (nthreads == NULL) 766 goto out_free; 767 768 if (size > 0) { 769 for (i = 0; i < npools; i++) { 770 rv = get_int(&mesg, &nthreads[i]); 771 if (rv == -ENOENT) 772 break; /* fewer numbers than pools */ 773 if (rv) 774 goto out_free; /* syntax error */ 775 rv = -EINVAL; 776 if (nthreads[i] < 0) 777 goto out_free; 778 } 779 rv = nfsd_set_nrthreads(i, nthreads); 780 if (rv) 781 goto out_free; 782 } 783 784 rv = nfsd_get_nrthreads(npools, nthreads); 785 if (rv) 786 goto out_free; 787 788 mesg = buf; 789 size = SIMPLE_TRANSACTION_LIMIT; 790 for (i = 0; i < npools && size > 0; i++) { 791 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 792 len = strlen(mesg); 793 size -= len; 794 mesg += len; 795 } 796 rv = mesg - buf; 797 out_free: 798 kfree(nthreads); 799 mutex_unlock(&nfsd_mutex); 800 return rv; 801 } 802 803 static ssize_t __write_versions(struct file *file, char *buf, size_t size) 804 { 805 char *mesg = buf; 806 char *vers, *minorp, sign; 807 int len, num, remaining; 808 unsigned minor; 809 ssize_t tlen = 0; 810 char *sep; 811 812 if (size>0) { 813 if (nfsd_serv) 814 /* Cannot change versions without updating 815 * nfsd_serv->sv_xdrsize, and reallocing 816 * rq_argp and rq_resp 817 */ 818 return -EBUSY; 819 if (buf[size-1] != '\n') 820 return -EINVAL; 821 buf[size-1] = 0; 822 823 vers = mesg; 824 len = qword_get(&mesg, vers, size); 825 if (len <= 0) return -EINVAL; 826 do { 827 sign = *vers; 828 if (sign == '+' || sign == '-') 829 num = simple_strtol((vers+1), &minorp, 0); 830 else 831 num = simple_strtol(vers, &minorp, 0); 832 if (*minorp == '.') { 833 if (num < 4) 834 return -EINVAL; 835 minor = simple_strtoul(minorp+1, NULL, 0); 836 if (minor == 0) 837 return -EINVAL; 838 if (nfsd_minorversion(minor, sign == '-' ? 839 NFSD_CLEAR : NFSD_SET) < 0) 840 return -EINVAL; 841 goto next; 842 } 843 switch(num) { 844 case 2: 845 case 3: 846 case 4: 847 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 848 break; 849 default: 850 return -EINVAL; 851 } 852 next: 853 vers += len + 1; 854 } while ((len = qword_get(&mesg, vers, size)) > 0); 855 /* If all get turned off, turn them back on, as 856 * having no versions is BAD 857 */ 858 nfsd_reset_versions(); 859 } 860 861 /* Now write current state into reply buffer */ 862 len = 0; 863 sep = ""; 864 remaining = SIMPLE_TRANSACTION_LIMIT; 865 for (num=2 ; num <= 4 ; num++) 866 if (nfsd_vers(num, NFSD_AVAIL)) { 867 len = snprintf(buf, remaining, "%s%c%d", sep, 868 nfsd_vers(num, NFSD_TEST)?'+':'-', 869 num); 870 sep = " "; 871 872 if (len > remaining) 873 break; 874 remaining -= len; 875 buf += len; 876 tlen += len; 877 } 878 if (nfsd_vers(4, NFSD_AVAIL)) 879 for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION; 880 minor++) { 881 len = snprintf(buf, remaining, " %c4.%u", 882 (nfsd_vers(4, NFSD_TEST) && 883 nfsd_minorversion(minor, NFSD_TEST)) ? 884 '+' : '-', 885 minor); 886 887 if (len > remaining) 888 break; 889 remaining -= len; 890 buf += len; 891 tlen += len; 892 } 893 894 len = snprintf(buf, remaining, "\n"); 895 if (len > remaining) 896 return -EINVAL; 897 return tlen + len; 898 } 899 900 /** 901 * write_versions - Set or report the available NFS protocol versions 902 * 903 * Input: 904 * buf: ignored 905 * size: zero 906 * Output: 907 * On success: passed-in buffer filled with '\n'-terminated C 908 * string containing positive or negative integer 909 * values representing the current status of each 910 * protocol version; 911 * return code is the size in bytes of the string 912 * On error: return code is zero or a negative errno value 913 * 914 * OR 915 * 916 * Input: 917 * buf: C string containing whitespace- 918 * separated positive or negative 919 * integer values representing NFS 920 * protocol versions to enable ("+n") 921 * or disable ("-n") 922 * size: non-zero length of C string in @buf 923 * Output: 924 * On success: status of zero or more protocol versions has 925 * been updated; passed-in buffer filled with 926 * '\n'-terminated C string containing positive 927 * or negative integer values representing the 928 * current status of each protocol version; 929 * return code is the size in bytes of the string 930 * On error: return code is zero or a negative errno value 931 */ 932 static ssize_t write_versions(struct file *file, char *buf, size_t size) 933 { 934 ssize_t rv; 935 936 mutex_lock(&nfsd_mutex); 937 rv = __write_versions(file, buf, size); 938 mutex_unlock(&nfsd_mutex); 939 return rv; 940 } 941 942 /* 943 * Zero-length write. Return a list of NFSD's current listener 944 * transports. 945 */ 946 static ssize_t __write_ports_names(char *buf) 947 { 948 if (nfsd_serv == NULL) 949 return 0; 950 return svc_xprt_names(nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 951 } 952 953 /* 954 * A single 'fd' number was written, in which case it must be for 955 * a socket of a supported family/protocol, and we use it as an 956 * nfsd listener. 957 */ 958 static ssize_t __write_ports_addfd(char *buf) 959 { 960 char *mesg = buf; 961 int fd, err; 962 963 err = get_int(&mesg, &fd); 964 if (err != 0 || fd < 0) 965 return -EINVAL; 966 967 err = nfsd_create_serv(); 968 if (err != 0) 969 return err; 970 971 err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT); 972 if (err < 0) { 973 svc_destroy(nfsd_serv); 974 return err; 975 } 976 977 /* Decrease the count, but don't shut down the service */ 978 nfsd_serv->sv_nrthreads--; 979 return err; 980 } 981 982 /* 983 * A '-' followed by the 'name' of a socket means we close the socket. 984 */ 985 static ssize_t __write_ports_delfd(char *buf) 986 { 987 char *toclose; 988 int len = 0; 989 990 toclose = kstrdup(buf + 1, GFP_KERNEL); 991 if (toclose == NULL) 992 return -ENOMEM; 993 994 if (nfsd_serv != NULL) 995 len = svc_sock_names(nfsd_serv, buf, 996 SIMPLE_TRANSACTION_LIMIT, toclose); 997 kfree(toclose); 998 return len; 999 } 1000 1001 /* 1002 * A transport listener is added by writing it's transport name and 1003 * a port number. 1004 */ 1005 static ssize_t __write_ports_addxprt(char *buf) 1006 { 1007 char transport[16]; 1008 struct svc_xprt *xprt; 1009 int port, err; 1010 1011 if (sscanf(buf, "%15s %4u", transport, &port) != 2) 1012 return -EINVAL; 1013 1014 if (port < 1 || port > USHRT_MAX) 1015 return -EINVAL; 1016 1017 err = nfsd_create_serv(); 1018 if (err != 0) 1019 return err; 1020 1021 err = svc_create_xprt(nfsd_serv, transport, &init_net, 1022 PF_INET, port, SVC_SOCK_ANONYMOUS); 1023 if (err < 0) 1024 goto out_err; 1025 1026 err = svc_create_xprt(nfsd_serv, transport, &init_net, 1027 PF_INET6, port, SVC_SOCK_ANONYMOUS); 1028 if (err < 0 && err != -EAFNOSUPPORT) 1029 goto out_close; 1030 1031 /* Decrease the count, but don't shut down the service */ 1032 nfsd_serv->sv_nrthreads--; 1033 return 0; 1034 out_close: 1035 xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port); 1036 if (xprt != NULL) { 1037 svc_close_xprt(xprt); 1038 svc_xprt_put(xprt); 1039 } 1040 out_err: 1041 svc_destroy(nfsd_serv); 1042 return err; 1043 } 1044 1045 /* 1046 * A transport listener is removed by writing a "-", it's transport 1047 * name, and it's port number. 1048 */ 1049 static ssize_t __write_ports_delxprt(char *buf) 1050 { 1051 struct svc_xprt *xprt; 1052 char transport[16]; 1053 int port; 1054 1055 if (sscanf(&buf[1], "%15s %4u", transport, &port) != 2) 1056 return -EINVAL; 1057 1058 if (port < 1 || port > USHRT_MAX || nfsd_serv == NULL) 1059 return -EINVAL; 1060 1061 xprt = svc_find_xprt(nfsd_serv, transport, AF_UNSPEC, port); 1062 if (xprt == NULL) 1063 return -ENOTCONN; 1064 1065 svc_close_xprt(xprt); 1066 svc_xprt_put(xprt); 1067 return 0; 1068 } 1069 1070 static ssize_t __write_ports(struct file *file, char *buf, size_t size) 1071 { 1072 if (size == 0) 1073 return __write_ports_names(buf); 1074 1075 if (isdigit(buf[0])) 1076 return __write_ports_addfd(buf); 1077 1078 if (buf[0] == '-' && isdigit(buf[1])) 1079 return __write_ports_delfd(buf); 1080 1081 if (isalpha(buf[0])) 1082 return __write_ports_addxprt(buf); 1083 1084 if (buf[0] == '-' && isalpha(buf[1])) 1085 return __write_ports_delxprt(buf); 1086 1087 return -EINVAL; 1088 } 1089 1090 /** 1091 * write_ports - Pass a socket file descriptor or transport name to listen on 1092 * 1093 * Input: 1094 * buf: ignored 1095 * size: zero 1096 * Output: 1097 * On success: passed-in buffer filled with a '\n'-terminated C 1098 * string containing a whitespace-separated list of 1099 * named NFSD listeners; 1100 * return code is the size in bytes of the string 1101 * On error: return code is zero or a negative errno value 1102 * 1103 * OR 1104 * 1105 * Input: 1106 * buf: C string containing an unsigned 1107 * integer value representing a bound 1108 * but unconnected socket that is to be 1109 * used as an NFSD listener; listen(3) 1110 * must be called for a SOCK_STREAM 1111 * socket, otherwise it is ignored 1112 * size: non-zero length of C string in @buf 1113 * Output: 1114 * On success: NFS service is started; 1115 * passed-in buffer filled with a '\n'-terminated C 1116 * string containing a unique alphanumeric name of 1117 * the listener; 1118 * return code is the size in bytes of the string 1119 * On error: return code is a negative errno value 1120 * 1121 * OR 1122 * 1123 * Input: 1124 * buf: C string containing a "-" followed 1125 * by an integer value representing a 1126 * previously passed in socket file 1127 * descriptor 1128 * size: non-zero length of C string in @buf 1129 * Output: 1130 * On success: NFS service no longer listens on that socket; 1131 * passed-in buffer filled with a '\n'-terminated C 1132 * string containing a unique name of the listener; 1133 * return code is the size in bytes of the string 1134 * On error: return code is a negative errno value 1135 * 1136 * OR 1137 * 1138 * Input: 1139 * buf: C string containing a transport 1140 * name and an unsigned integer value 1141 * representing the port to listen on, 1142 * separated by whitespace 1143 * size: non-zero length of C string in @buf 1144 * Output: 1145 * On success: returns zero; NFS service is started 1146 * On error: return code is a negative errno value 1147 * 1148 * OR 1149 * 1150 * Input: 1151 * buf: C string containing a "-" followed 1152 * by a transport name and an unsigned 1153 * integer value representing the port 1154 * to listen on, separated by whitespace 1155 * size: non-zero length of C string in @buf 1156 * Output: 1157 * On success: returns zero; NFS service no longer listens 1158 * on that transport 1159 * On error: return code is a negative errno value 1160 */ 1161 static ssize_t write_ports(struct file *file, char *buf, size_t size) 1162 { 1163 ssize_t rv; 1164 1165 mutex_lock(&nfsd_mutex); 1166 rv = __write_ports(file, buf, size); 1167 mutex_unlock(&nfsd_mutex); 1168 return rv; 1169 } 1170 1171 1172 int nfsd_max_blksize; 1173 1174 /** 1175 * write_maxblksize - Set or report the current NFS blksize 1176 * 1177 * Input: 1178 * buf: ignored 1179 * size: zero 1180 * 1181 * OR 1182 * 1183 * Input: 1184 * buf: C string containing an unsigned 1185 * integer value representing the new 1186 * NFS blksize 1187 * size: non-zero length of C string in @buf 1188 * Output: 1189 * On success: passed-in buffer filled with '\n'-terminated C string 1190 * containing numeric value of the current NFS blksize 1191 * setting; 1192 * return code is the size in bytes of the string 1193 * On error: return code is zero or a negative errno value 1194 */ 1195 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 1196 { 1197 char *mesg = buf; 1198 if (size > 0) { 1199 int bsize; 1200 int rv = get_int(&mesg, &bsize); 1201 if (rv) 1202 return rv; 1203 /* force bsize into allowed range and 1204 * required alignment. 1205 */ 1206 if (bsize < 1024) 1207 bsize = 1024; 1208 if (bsize > NFSSVC_MAXBLKSIZE) 1209 bsize = NFSSVC_MAXBLKSIZE; 1210 bsize &= ~(1024-1); 1211 mutex_lock(&nfsd_mutex); 1212 if (nfsd_serv) { 1213 mutex_unlock(&nfsd_mutex); 1214 return -EBUSY; 1215 } 1216 nfsd_max_blksize = bsize; 1217 mutex_unlock(&nfsd_mutex); 1218 } 1219 1220 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 1221 nfsd_max_blksize); 1222 } 1223 1224 #ifdef CONFIG_NFSD_V4 1225 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 1226 { 1227 char *mesg = buf; 1228 int rv, i; 1229 1230 if (size > 0) { 1231 if (nfsd_serv) 1232 return -EBUSY; 1233 rv = get_int(&mesg, &i); 1234 if (rv) 1235 return rv; 1236 /* 1237 * Some sanity checking. We don't have a reason for 1238 * these particular numbers, but problems with the 1239 * extremes are: 1240 * - Too short: the briefest network outage may 1241 * cause clients to lose all their locks. Also, 1242 * the frequent polling may be wasteful. 1243 * - Too long: do you really want reboot recovery 1244 * to take more than an hour? Or to make other 1245 * clients wait an hour before being able to 1246 * revoke a dead client's locks? 1247 */ 1248 if (i < 10 || i > 3600) 1249 return -EINVAL; 1250 *time = i; 1251 } 1252 1253 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%ld\n", *time); 1254 } 1255 1256 static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, time_t *time) 1257 { 1258 ssize_t rv; 1259 1260 mutex_lock(&nfsd_mutex); 1261 rv = __nfsd4_write_time(file, buf, size, time); 1262 mutex_unlock(&nfsd_mutex); 1263 return rv; 1264 } 1265 1266 /** 1267 * write_leasetime - Set or report the current NFSv4 lease time 1268 * 1269 * Input: 1270 * buf: ignored 1271 * size: zero 1272 * 1273 * OR 1274 * 1275 * Input: 1276 * buf: C string containing an unsigned 1277 * integer value representing the new 1278 * NFSv4 lease expiry time 1279 * size: non-zero length of C string in @buf 1280 * Output: 1281 * On success: passed-in buffer filled with '\n'-terminated C 1282 * string containing unsigned integer value of the 1283 * current lease expiry time; 1284 * return code is the size in bytes of the string 1285 * On error: return code is zero or a negative errno value 1286 */ 1287 static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 1288 { 1289 return nfsd4_write_time(file, buf, size, &nfsd4_lease); 1290 } 1291 1292 /** 1293 * write_gracetime - Set or report current NFSv4 grace period time 1294 * 1295 * As above, but sets the time of the NFSv4 grace period. 1296 * 1297 * Note this should never be set to less than the *previous* 1298 * lease-period time, but we don't try to enforce this. (In the common 1299 * case (a new boot), we don't know what the previous lease time was 1300 * anyway.) 1301 */ 1302 static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1303 { 1304 return nfsd4_write_time(file, buf, size, &nfsd4_grace); 1305 } 1306 1307 extern char *nfs4_recoverydir(void); 1308 1309 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size) 1310 { 1311 char *mesg = buf; 1312 char *recdir; 1313 int len, status; 1314 1315 if (size > 0) { 1316 if (nfsd_serv) 1317 return -EBUSY; 1318 if (size > PATH_MAX || buf[size-1] != '\n') 1319 return -EINVAL; 1320 buf[size-1] = 0; 1321 1322 recdir = mesg; 1323 len = qword_get(&mesg, recdir, size); 1324 if (len <= 0) 1325 return -EINVAL; 1326 1327 status = nfs4_reset_recoverydir(recdir); 1328 if (status) 1329 return status; 1330 } 1331 1332 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 1333 nfs4_recoverydir()); 1334 } 1335 1336 /** 1337 * write_recoverydir - Set or report the pathname of the recovery directory 1338 * 1339 * Input: 1340 * buf: ignored 1341 * size: zero 1342 * 1343 * OR 1344 * 1345 * Input: 1346 * buf: C string containing the pathname 1347 * of the directory on a local file 1348 * system containing permanent NFSv4 1349 * recovery data 1350 * size: non-zero length of C string in @buf 1351 * Output: 1352 * On success: passed-in buffer filled with '\n'-terminated C string 1353 * containing the current recovery pathname setting; 1354 * return code is the size in bytes of the string 1355 * On error: return code is zero or a negative errno value 1356 */ 1357 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 1358 { 1359 ssize_t rv; 1360 1361 mutex_lock(&nfsd_mutex); 1362 rv = __write_recoverydir(file, buf, size); 1363 mutex_unlock(&nfsd_mutex); 1364 return rv; 1365 } 1366 1367 #endif 1368 1369 /*----------------------------------------------------------------------------*/ 1370 /* 1371 * populating the filesystem. 1372 */ 1373 1374 static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 1375 { 1376 static struct tree_descr nfsd_files[] = { 1377 #ifdef CONFIG_NFSD_DEPRECATED 1378 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 1379 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 1380 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 1381 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 1382 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 1383 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 1384 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 1385 #endif 1386 [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 1387 [NFSD_Export_features] = {"export_features", 1388 &export_features_operations, S_IRUGO}, 1389 [NFSD_FO_UnlockIP] = {"unlock_ip", 1390 &transaction_ops, S_IWUSR|S_IRUSR}, 1391 [NFSD_FO_UnlockFS] = {"unlock_filesystem", 1392 &transaction_ops, S_IWUSR|S_IRUSR}, 1393 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 1394 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1395 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1396 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 1397 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 1398 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1399 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 1400 #ifdef CONFIG_NFSD_V4 1401 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1402 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1403 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 1404 #endif 1405 /* last one */ {""} 1406 }; 1407 return simple_fill_super(sb, 0x6e667364, nfsd_files); 1408 } 1409 1410 static struct dentry *nfsd_mount(struct file_system_type *fs_type, 1411 int flags, const char *dev_name, void *data) 1412 { 1413 return mount_single(fs_type, flags, data, nfsd_fill_super); 1414 } 1415 1416 static struct file_system_type nfsd_fs_type = { 1417 .owner = THIS_MODULE, 1418 .name = "nfsd", 1419 .mount = nfsd_mount, 1420 .kill_sb = kill_litter_super, 1421 }; 1422 1423 #ifdef CONFIG_PROC_FS 1424 static int create_proc_exports_entry(void) 1425 { 1426 struct proc_dir_entry *entry; 1427 1428 entry = proc_mkdir("fs/nfs", NULL); 1429 if (!entry) 1430 return -ENOMEM; 1431 entry = proc_create("exports", 0, entry, &exports_operations); 1432 if (!entry) 1433 return -ENOMEM; 1434 return 0; 1435 } 1436 #else /* CONFIG_PROC_FS */ 1437 static int create_proc_exports_entry(void) 1438 { 1439 return 0; 1440 } 1441 #endif 1442 1443 static int __init init_nfsd(void) 1444 { 1445 int retval; 1446 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 1447 1448 retval = nfs4_state_init(); /* nfs4 locking state */ 1449 if (retval) 1450 return retval; 1451 nfsd_stat_init(); /* Statistics */ 1452 retval = nfsd_reply_cache_init(); 1453 if (retval) 1454 goto out_free_stat; 1455 retval = nfsd_export_init(); 1456 if (retval) 1457 goto out_free_cache; 1458 nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1459 retval = nfsd_idmap_init(); 1460 if (retval) 1461 goto out_free_lockd; 1462 retval = create_proc_exports_entry(); 1463 if (retval) 1464 goto out_free_idmap; 1465 retval = register_filesystem(&nfsd_fs_type); 1466 if (retval) 1467 goto out_free_all; 1468 return 0; 1469 out_free_all: 1470 remove_proc_entry("fs/nfs/exports", NULL); 1471 remove_proc_entry("fs/nfs", NULL); 1472 out_free_idmap: 1473 nfsd_idmap_shutdown(); 1474 out_free_lockd: 1475 nfsd_lockd_shutdown(); 1476 nfsd_export_shutdown(); 1477 out_free_cache: 1478 nfsd_reply_cache_shutdown(); 1479 out_free_stat: 1480 nfsd_stat_shutdown(); 1481 nfsd4_free_slabs(); 1482 return retval; 1483 } 1484 1485 static void __exit exit_nfsd(void) 1486 { 1487 nfsd_export_shutdown(); 1488 nfsd_reply_cache_shutdown(); 1489 remove_proc_entry("fs/nfs/exports", NULL); 1490 remove_proc_entry("fs/nfs", NULL); 1491 nfsd_stat_shutdown(); 1492 nfsd_lockd_shutdown(); 1493 nfsd_idmap_shutdown(); 1494 nfsd4_free_slabs(); 1495 unregister_filesystem(&nfsd_fs_type); 1496 } 1497 1498 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 1499 MODULE_LICENSE("GPL"); 1500 module_init(init_nfsd) 1501 module_exit(exit_nfsd) 1502