1 /* 2 * linux/fs/nfsd/nfsctl.c 3 * 4 * Syscall interface to knfsd. 5 * 6 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 7 */ 8 9 #include <linux/module.h> 10 11 #include <linux/linkage.h> 12 #include <linux/time.h> 13 #include <linux/errno.h> 14 #include <linux/fs.h> 15 #include <linux/fcntl.h> 16 #include <linux/net.h> 17 #include <linux/in.h> 18 #include <linux/syscalls.h> 19 #include <linux/unistd.h> 20 #include <linux/slab.h> 21 #include <linux/proc_fs.h> 22 #include <linux/seq_file.h> 23 #include <linux/pagemap.h> 24 #include <linux/init.h> 25 #include <linux/string.h> 26 #include <linux/smp_lock.h> 27 #include <linux/ctype.h> 28 29 #include <linux/nfs.h> 30 #include <linux/nfsd_idmap.h> 31 #include <linux/lockd/bind.h> 32 #include <linux/sunrpc/svc.h> 33 #include <linux/sunrpc/svcsock.h> 34 #include <linux/nfsd/nfsd.h> 35 #include <linux/nfsd/cache.h> 36 #include <linux/nfsd/xdr.h> 37 #include <linux/nfsd/syscall.h> 38 39 #include <asm/uaccess.h> 40 41 /* 42 * We have a single directory with 9 nodes in it. 43 */ 44 enum { 45 NFSD_Root = 1, 46 NFSD_Svc, 47 NFSD_Add, 48 NFSD_Del, 49 NFSD_Export, 50 NFSD_Unexport, 51 NFSD_Getfd, 52 NFSD_Getfs, 53 NFSD_List, 54 NFSD_Fh, 55 NFSD_Threads, 56 NFSD_Pool_Threads, 57 NFSD_Versions, 58 NFSD_Ports, 59 NFSD_MaxBlkSize, 60 /* 61 * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 62 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 63 */ 64 #ifdef CONFIG_NFSD_V4 65 NFSD_Leasetime, 66 NFSD_RecoveryDir, 67 #endif 68 }; 69 70 /* 71 * write() for these nodes. 72 */ 73 static ssize_t write_svc(struct file *file, char *buf, size_t size); 74 static ssize_t write_add(struct file *file, char *buf, size_t size); 75 static ssize_t write_del(struct file *file, char *buf, size_t size); 76 static ssize_t write_export(struct file *file, char *buf, size_t size); 77 static ssize_t write_unexport(struct file *file, char *buf, size_t size); 78 static ssize_t write_getfd(struct file *file, char *buf, size_t size); 79 static ssize_t write_getfs(struct file *file, char *buf, size_t size); 80 static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 81 static ssize_t write_threads(struct file *file, char *buf, size_t size); 82 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 83 static ssize_t write_versions(struct file *file, char *buf, size_t size); 84 static ssize_t write_ports(struct file *file, char *buf, size_t size); 85 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 86 #ifdef CONFIG_NFSD_V4 87 static ssize_t write_leasetime(struct file *file, char *buf, size_t size); 88 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); 89 #endif 90 91 static ssize_t (*write_op[])(struct file *, char *, size_t) = { 92 [NFSD_Svc] = write_svc, 93 [NFSD_Add] = write_add, 94 [NFSD_Del] = write_del, 95 [NFSD_Export] = write_export, 96 [NFSD_Unexport] = write_unexport, 97 [NFSD_Getfd] = write_getfd, 98 [NFSD_Getfs] = write_getfs, 99 [NFSD_Fh] = write_filehandle, 100 [NFSD_Threads] = write_threads, 101 [NFSD_Pool_Threads] = write_pool_threads, 102 [NFSD_Versions] = write_versions, 103 [NFSD_Ports] = write_ports, 104 [NFSD_MaxBlkSize] = write_maxblksize, 105 #ifdef CONFIG_NFSD_V4 106 [NFSD_Leasetime] = write_leasetime, 107 [NFSD_RecoveryDir] = write_recoverydir, 108 #endif 109 }; 110 111 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 112 { 113 ino_t ino = file->f_path.dentry->d_inode->i_ino; 114 char *data; 115 ssize_t rv; 116 117 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 118 return -EINVAL; 119 120 data = simple_transaction_get(file, buf, size); 121 if (IS_ERR(data)) 122 return PTR_ERR(data); 123 124 rv = write_op[ino](file, data, size); 125 if (rv >= 0) { 126 simple_transaction_set(file, rv); 127 rv = size; 128 } 129 return rv; 130 } 131 132 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 133 { 134 if (! file->private_data) { 135 /* An attempt to read a transaction file without writing 136 * causes a 0-byte write so that the file can return 137 * state information 138 */ 139 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 140 if (rv < 0) 141 return rv; 142 } 143 return simple_transaction_read(file, buf, size, pos); 144 } 145 146 static const struct file_operations transaction_ops = { 147 .write = nfsctl_transaction_write, 148 .read = nfsctl_transaction_read, 149 .release = simple_transaction_release, 150 }; 151 152 extern struct seq_operations nfs_exports_op; 153 static int exports_open(struct inode *inode, struct file *file) 154 { 155 return seq_open(file, &nfs_exports_op); 156 } 157 158 static const struct file_operations exports_operations = { 159 .open = exports_open, 160 .read = seq_read, 161 .llseek = seq_lseek, 162 .release = seq_release, 163 }; 164 165 /*----------------------------------------------------------------------------*/ 166 /* 167 * payload - write methods 168 * If the method has a response, the response should be put in buf, 169 * and the length returned. Otherwise return 0 or and -error. 170 */ 171 172 static ssize_t write_svc(struct file *file, char *buf, size_t size) 173 { 174 struct nfsctl_svc *data; 175 if (size < sizeof(*data)) 176 return -EINVAL; 177 data = (struct nfsctl_svc*) buf; 178 return nfsd_svc(data->svc_port, data->svc_nthreads); 179 } 180 181 static ssize_t write_add(struct file *file, char *buf, size_t size) 182 { 183 struct nfsctl_client *data; 184 if (size < sizeof(*data)) 185 return -EINVAL; 186 data = (struct nfsctl_client *)buf; 187 return exp_addclient(data); 188 } 189 190 static ssize_t write_del(struct file *file, char *buf, size_t size) 191 { 192 struct nfsctl_client *data; 193 if (size < sizeof(*data)) 194 return -EINVAL; 195 data = (struct nfsctl_client *)buf; 196 return exp_delclient(data); 197 } 198 199 static ssize_t write_export(struct file *file, char *buf, size_t size) 200 { 201 struct nfsctl_export *data; 202 if (size < sizeof(*data)) 203 return -EINVAL; 204 data = (struct nfsctl_export*)buf; 205 return exp_export(data); 206 } 207 208 static ssize_t write_unexport(struct file *file, char *buf, size_t size) 209 { 210 struct nfsctl_export *data; 211 212 if (size < sizeof(*data)) 213 return -EINVAL; 214 data = (struct nfsctl_export*)buf; 215 return exp_unexport(data); 216 } 217 218 static ssize_t write_getfs(struct file *file, char *buf, size_t size) 219 { 220 struct nfsctl_fsparm *data; 221 struct sockaddr_in *sin; 222 struct auth_domain *clp; 223 int err = 0; 224 struct knfsd_fh *res; 225 226 if (size < sizeof(*data)) 227 return -EINVAL; 228 data = (struct nfsctl_fsparm*)buf; 229 err = -EPROTONOSUPPORT; 230 if (data->gd_addr.sa_family != AF_INET) 231 goto out; 232 sin = (struct sockaddr_in *)&data->gd_addr; 233 if (data->gd_maxlen > NFS3_FHSIZE) 234 data->gd_maxlen = NFS3_FHSIZE; 235 236 res = (struct knfsd_fh*)buf; 237 238 exp_readlock(); 239 if (!(clp = auth_unix_lookup(sin->sin_addr))) 240 err = -EPERM; 241 else { 242 err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen); 243 auth_domain_put(clp); 244 } 245 exp_readunlock(); 246 if (err == 0) 247 err = res->fh_size + offsetof(struct knfsd_fh, fh_base); 248 out: 249 return err; 250 } 251 252 static ssize_t write_getfd(struct file *file, char *buf, size_t size) 253 { 254 struct nfsctl_fdparm *data; 255 struct sockaddr_in *sin; 256 struct auth_domain *clp; 257 int err = 0; 258 struct knfsd_fh fh; 259 char *res; 260 261 if (size < sizeof(*data)) 262 return -EINVAL; 263 data = (struct nfsctl_fdparm*)buf; 264 err = -EPROTONOSUPPORT; 265 if (data->gd_addr.sa_family != AF_INET) 266 goto out; 267 err = -EINVAL; 268 if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS) 269 goto out; 270 271 res = buf; 272 sin = (struct sockaddr_in *)&data->gd_addr; 273 exp_readlock(); 274 if (!(clp = auth_unix_lookup(sin->sin_addr))) 275 err = -EPERM; 276 else { 277 err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE); 278 auth_domain_put(clp); 279 } 280 exp_readunlock(); 281 282 if (err == 0) { 283 memset(res,0, NFS_FHSIZE); 284 memcpy(res, &fh.fh_base, fh.fh_size); 285 err = NFS_FHSIZE; 286 } 287 out: 288 return err; 289 } 290 291 static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 292 { 293 /* request is: 294 * domain path maxsize 295 * response is 296 * filehandle 297 * 298 * qword quoting is used, so filehandle will be \x.... 299 */ 300 char *dname, *path; 301 int maxsize; 302 char *mesg = buf; 303 int len; 304 struct auth_domain *dom; 305 struct knfsd_fh fh; 306 307 if (buf[size-1] != '\n') 308 return -EINVAL; 309 buf[size-1] = 0; 310 311 dname = mesg; 312 len = qword_get(&mesg, dname, size); 313 if (len <= 0) return -EINVAL; 314 315 path = dname+len+1; 316 len = qword_get(&mesg, path, size); 317 if (len <= 0) return -EINVAL; 318 319 len = get_int(&mesg, &maxsize); 320 if (len) 321 return len; 322 323 if (maxsize < NFS_FHSIZE) 324 return -EINVAL; 325 if (maxsize > NFS3_FHSIZE) 326 maxsize = NFS3_FHSIZE; 327 328 if (qword_get(&mesg, mesg, size)>0) 329 return -EINVAL; 330 331 /* we have all the words, they are in buf.. */ 332 dom = unix_domain_find(dname); 333 if (!dom) 334 return -ENOMEM; 335 336 len = exp_rootfh(dom, path, &fh, maxsize); 337 auth_domain_put(dom); 338 if (len) 339 return len; 340 341 mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; 342 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 343 mesg[-1] = '\n'; 344 return mesg - buf; 345 } 346 347 extern int nfsd_nrthreads(void); 348 349 static ssize_t write_threads(struct file *file, char *buf, size_t size) 350 { 351 /* if size > 0, look for a number of threads and call nfsd_svc 352 * then write out number of threads as reply 353 */ 354 char *mesg = buf; 355 int rv; 356 if (size > 0) { 357 int newthreads; 358 rv = get_int(&mesg, &newthreads); 359 if (rv) 360 return rv; 361 if (newthreads <0) 362 return -EINVAL; 363 rv = nfsd_svc(2049, newthreads); 364 if (rv) 365 return rv; 366 } 367 sprintf(buf, "%d\n", nfsd_nrthreads()); 368 return strlen(buf); 369 } 370 371 extern int nfsd_nrpools(void); 372 extern int nfsd_get_nrthreads(int n, int *); 373 extern int nfsd_set_nrthreads(int n, int *); 374 375 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 376 { 377 /* if size > 0, look for an array of number of threads per node 378 * and apply them then write out number of threads per node as reply 379 */ 380 char *mesg = buf; 381 int i; 382 int rv; 383 int len; 384 int npools = nfsd_nrpools(); 385 int *nthreads; 386 387 if (npools == 0) { 388 /* 389 * NFS is shut down. The admin can start it by 390 * writing to the threads file but NOT the pool_threads 391 * file, sorry. Report zero threads. 392 */ 393 strcpy(buf, "0\n"); 394 return strlen(buf); 395 } 396 397 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 398 if (nthreads == NULL) 399 return -ENOMEM; 400 401 if (size > 0) { 402 for (i = 0; i < npools; i++) { 403 rv = get_int(&mesg, &nthreads[i]); 404 if (rv == -ENOENT) 405 break; /* fewer numbers than pools */ 406 if (rv) 407 goto out_free; /* syntax error */ 408 rv = -EINVAL; 409 if (nthreads[i] < 0) 410 goto out_free; 411 } 412 rv = nfsd_set_nrthreads(i, nthreads); 413 if (rv) 414 goto out_free; 415 } 416 417 rv = nfsd_get_nrthreads(npools, nthreads); 418 if (rv) 419 goto out_free; 420 421 mesg = buf; 422 size = SIMPLE_TRANSACTION_LIMIT; 423 for (i = 0; i < npools && size > 0; i++) { 424 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 425 len = strlen(mesg); 426 size -= len; 427 mesg += len; 428 } 429 430 return (mesg-buf); 431 432 out_free: 433 kfree(nthreads); 434 return rv; 435 } 436 437 static ssize_t write_versions(struct file *file, char *buf, size_t size) 438 { 439 /* 440 * Format: 441 * [-/+]vers [-/+]vers ... 442 */ 443 char *mesg = buf; 444 char *vers, sign; 445 int len, num; 446 ssize_t tlen = 0; 447 char *sep; 448 449 if (size>0) { 450 if (nfsd_serv) 451 /* Cannot change versions without updating 452 * nfsd_serv->sv_xdrsize, and reallocing 453 * rq_argp and rq_resp 454 */ 455 return -EBUSY; 456 if (buf[size-1] != '\n') 457 return -EINVAL; 458 buf[size-1] = 0; 459 460 vers = mesg; 461 len = qword_get(&mesg, vers, size); 462 if (len <= 0) return -EINVAL; 463 do { 464 sign = *vers; 465 if (sign == '+' || sign == '-') 466 num = simple_strtol((vers+1), NULL, 0); 467 else 468 num = simple_strtol(vers, NULL, 0); 469 switch(num) { 470 case 2: 471 case 3: 472 case 4: 473 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 474 break; 475 default: 476 return -EINVAL; 477 } 478 vers += len + 1; 479 tlen += len; 480 } while ((len = qword_get(&mesg, vers, size)) > 0); 481 /* If all get turned off, turn them back on, as 482 * having no versions is BAD 483 */ 484 nfsd_reset_versions(); 485 } 486 /* Now write current state into reply buffer */ 487 len = 0; 488 sep = ""; 489 for (num=2 ; num <= 4 ; num++) 490 if (nfsd_vers(num, NFSD_AVAIL)) { 491 len += sprintf(buf+len, "%s%c%d", sep, 492 nfsd_vers(num, NFSD_TEST)?'+':'-', 493 num); 494 sep = " "; 495 } 496 len += sprintf(buf+len, "\n"); 497 return len; 498 } 499 500 static ssize_t write_ports(struct file *file, char *buf, size_t size) 501 { 502 if (size == 0) { 503 int len = 0; 504 lock_kernel(); 505 if (nfsd_serv) 506 len = svc_sock_names(buf, nfsd_serv, NULL); 507 unlock_kernel(); 508 return len; 509 } 510 /* Either a single 'fd' number is written, in which 511 * case it must be for a socket of a supported family/protocol, 512 * and we use it as an nfsd socket, or 513 * A '-' followed by the 'name' of a socket in which case 514 * we close the socket. 515 */ 516 if (isdigit(buf[0])) { 517 char *mesg = buf; 518 int fd; 519 int err; 520 err = get_int(&mesg, &fd); 521 if (err) 522 return -EINVAL; 523 if (fd < 0) 524 return -EINVAL; 525 err = nfsd_create_serv(); 526 if (!err) { 527 int proto = 0; 528 err = svc_addsock(nfsd_serv, fd, buf, &proto); 529 if (err >= 0) { 530 err = lockd_up(proto); 531 if (err < 0) 532 svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); 533 } 534 /* Decrease the count, but don't shutdown the 535 * the service 536 */ 537 lock_kernel(); 538 nfsd_serv->sv_nrthreads--; 539 unlock_kernel(); 540 } 541 return err < 0 ? err : 0; 542 } 543 if (buf[0] == '-') { 544 char *toclose = kstrdup(buf+1, GFP_KERNEL); 545 int len = 0; 546 if (!toclose) 547 return -ENOMEM; 548 lock_kernel(); 549 if (nfsd_serv) 550 len = svc_sock_names(buf, nfsd_serv, toclose); 551 unlock_kernel(); 552 if (len >= 0) 553 lockd_down(); 554 kfree(toclose); 555 return len; 556 } 557 return -EINVAL; 558 } 559 560 int nfsd_max_blksize; 561 562 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 563 { 564 char *mesg = buf; 565 if (size > 0) { 566 int bsize; 567 int rv = get_int(&mesg, &bsize); 568 if (rv) 569 return rv; 570 /* force bsize into allowed range and 571 * required alignment. 572 */ 573 if (bsize < 1024) 574 bsize = 1024; 575 if (bsize > NFSSVC_MAXBLKSIZE) 576 bsize = NFSSVC_MAXBLKSIZE; 577 bsize &= ~(1024-1); 578 lock_kernel(); 579 if (nfsd_serv && nfsd_serv->sv_nrthreads) { 580 unlock_kernel(); 581 return -EBUSY; 582 } 583 nfsd_max_blksize = bsize; 584 unlock_kernel(); 585 } 586 return sprintf(buf, "%d\n", nfsd_max_blksize); 587 } 588 589 #ifdef CONFIG_NFSD_V4 590 extern time_t nfs4_leasetime(void); 591 592 static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 593 { 594 /* if size > 10 seconds, call 595 * nfs4_reset_lease() then write out the new lease (seconds) as reply 596 */ 597 char *mesg = buf; 598 int rv; 599 600 if (size > 0) { 601 int lease; 602 rv = get_int(&mesg, &lease); 603 if (rv) 604 return rv; 605 if (lease < 10 || lease > 3600) 606 return -EINVAL; 607 nfs4_reset_lease(lease); 608 } 609 sprintf(buf, "%ld\n", nfs4_lease_time()); 610 return strlen(buf); 611 } 612 613 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 614 { 615 char *mesg = buf; 616 char *recdir; 617 int len, status; 618 619 if (size > PATH_MAX || buf[size-1] != '\n') 620 return -EINVAL; 621 buf[size-1] = 0; 622 623 recdir = mesg; 624 len = qword_get(&mesg, recdir, size); 625 if (len <= 0) 626 return -EINVAL; 627 628 status = nfs4_reset_recoverydir(recdir); 629 return strlen(buf); 630 } 631 #endif 632 633 /*----------------------------------------------------------------------------*/ 634 /* 635 * populating the filesystem. 636 */ 637 638 static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 639 { 640 static struct tree_descr nfsd_files[] = { 641 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 642 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 643 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 644 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 645 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 646 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 647 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 648 [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 649 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 650 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 651 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 652 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 653 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 654 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 655 #ifdef CONFIG_NFSD_V4 656 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 657 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 658 #endif 659 /* last one */ {""} 660 }; 661 return simple_fill_super(sb, 0x6e667364, nfsd_files); 662 } 663 664 static int nfsd_get_sb(struct file_system_type *fs_type, 665 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 666 { 667 return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); 668 } 669 670 static struct file_system_type nfsd_fs_type = { 671 .owner = THIS_MODULE, 672 .name = "nfsd", 673 .get_sb = nfsd_get_sb, 674 .kill_sb = kill_litter_super, 675 }; 676 677 static int __init init_nfsd(void) 678 { 679 int retval; 680 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 681 682 nfsd_stat_init(); /* Statistics */ 683 nfsd_cache_init(); /* RPC reply cache */ 684 nfsd_export_init(); /* Exports table */ 685 nfsd_lockd_init(); /* lockd->nfsd callbacks */ 686 nfs4_state_init(); /* NFSv4 locking state */ 687 nfsd_idmap_init(); /* Name to ID mapping */ 688 if (proc_mkdir("fs/nfs", NULL)) { 689 struct proc_dir_entry *entry; 690 entry = create_proc_entry("fs/nfs/exports", 0, NULL); 691 if (entry) 692 entry->proc_fops = &exports_operations; 693 } 694 retval = register_filesystem(&nfsd_fs_type); 695 if (retval) { 696 nfsd_export_shutdown(); 697 nfsd_cache_shutdown(); 698 remove_proc_entry("fs/nfs/exports", NULL); 699 remove_proc_entry("fs/nfs", NULL); 700 nfsd_stat_shutdown(); 701 nfsd_lockd_shutdown(); 702 } 703 return retval; 704 } 705 706 static void __exit exit_nfsd(void) 707 { 708 nfsd_export_shutdown(); 709 nfsd_cache_shutdown(); 710 remove_proc_entry("fs/nfs/exports", NULL); 711 remove_proc_entry("fs/nfs", NULL); 712 nfsd_stat_shutdown(); 713 nfsd_lockd_shutdown(); 714 nfsd_idmap_shutdown(); 715 unregister_filesystem(&nfsd_fs_type); 716 } 717 718 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 719 MODULE_LICENSE("GPL"); 720 module_init(init_nfsd) 721 module_exit(exit_nfsd) 722