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 uninitialized_var(maxsize); 302 char *mesg = buf; 303 int len; 304 struct auth_domain *dom; 305 struct knfsd_fh fh; 306 307 if (size == 0) 308 return -EINVAL; 309 310 if (buf[size-1] != '\n') 311 return -EINVAL; 312 buf[size-1] = 0; 313 314 dname = mesg; 315 len = qword_get(&mesg, dname, size); 316 if (len <= 0) return -EINVAL; 317 318 path = dname+len+1; 319 len = qword_get(&mesg, path, size); 320 if (len <= 0) return -EINVAL; 321 322 len = get_int(&mesg, &maxsize); 323 if (len) 324 return len; 325 326 if (maxsize < NFS_FHSIZE) 327 return -EINVAL; 328 if (maxsize > NFS3_FHSIZE) 329 maxsize = NFS3_FHSIZE; 330 331 if (qword_get(&mesg, mesg, size)>0) 332 return -EINVAL; 333 334 /* we have all the words, they are in buf.. */ 335 dom = unix_domain_find(dname); 336 if (!dom) 337 return -ENOMEM; 338 339 len = exp_rootfh(dom, path, &fh, maxsize); 340 auth_domain_put(dom); 341 if (len) 342 return len; 343 344 mesg = buf; len = SIMPLE_TRANSACTION_LIMIT; 345 qword_addhex(&mesg, &len, (char*)&fh.fh_base, fh.fh_size); 346 mesg[-1] = '\n'; 347 return mesg - buf; 348 } 349 350 extern int nfsd_nrthreads(void); 351 352 static ssize_t write_threads(struct file *file, char *buf, size_t size) 353 { 354 /* if size > 0, look for a number of threads and call nfsd_svc 355 * then write out number of threads as reply 356 */ 357 char *mesg = buf; 358 int rv; 359 if (size > 0) { 360 int newthreads; 361 rv = get_int(&mesg, &newthreads); 362 if (rv) 363 return rv; 364 if (newthreads <0) 365 return -EINVAL; 366 rv = nfsd_svc(2049, newthreads); 367 if (rv) 368 return rv; 369 } 370 sprintf(buf, "%d\n", nfsd_nrthreads()); 371 return strlen(buf); 372 } 373 374 extern int nfsd_nrpools(void); 375 extern int nfsd_get_nrthreads(int n, int *); 376 extern int nfsd_set_nrthreads(int n, int *); 377 378 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 379 { 380 /* if size > 0, look for an array of number of threads per node 381 * and apply them then write out number of threads per node as reply 382 */ 383 char *mesg = buf; 384 int i; 385 int rv; 386 int len; 387 int npools = nfsd_nrpools(); 388 int *nthreads; 389 390 if (npools == 0) { 391 /* 392 * NFS is shut down. The admin can start it by 393 * writing to the threads file but NOT the pool_threads 394 * file, sorry. Report zero threads. 395 */ 396 strcpy(buf, "0\n"); 397 return strlen(buf); 398 } 399 400 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 401 if (nthreads == NULL) 402 return -ENOMEM; 403 404 if (size > 0) { 405 for (i = 0; i < npools; i++) { 406 rv = get_int(&mesg, &nthreads[i]); 407 if (rv == -ENOENT) 408 break; /* fewer numbers than pools */ 409 if (rv) 410 goto out_free; /* syntax error */ 411 rv = -EINVAL; 412 if (nthreads[i] < 0) 413 goto out_free; 414 } 415 rv = nfsd_set_nrthreads(i, nthreads); 416 if (rv) 417 goto out_free; 418 } 419 420 rv = nfsd_get_nrthreads(npools, nthreads); 421 if (rv) 422 goto out_free; 423 424 mesg = buf; 425 size = SIMPLE_TRANSACTION_LIMIT; 426 for (i = 0; i < npools && size > 0; i++) { 427 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 428 len = strlen(mesg); 429 size -= len; 430 mesg += len; 431 } 432 433 return (mesg-buf); 434 435 out_free: 436 kfree(nthreads); 437 return rv; 438 } 439 440 static ssize_t write_versions(struct file *file, char *buf, size_t size) 441 { 442 /* 443 * Format: 444 * [-/+]vers [-/+]vers ... 445 */ 446 char *mesg = buf; 447 char *vers, sign; 448 int len, num; 449 ssize_t tlen = 0; 450 char *sep; 451 452 if (size>0) { 453 if (nfsd_serv) 454 /* Cannot change versions without updating 455 * nfsd_serv->sv_xdrsize, and reallocing 456 * rq_argp and rq_resp 457 */ 458 return -EBUSY; 459 if (buf[size-1] != '\n') 460 return -EINVAL; 461 buf[size-1] = 0; 462 463 vers = mesg; 464 len = qword_get(&mesg, vers, size); 465 if (len <= 0) return -EINVAL; 466 do { 467 sign = *vers; 468 if (sign == '+' || sign == '-') 469 num = simple_strtol((vers+1), NULL, 0); 470 else 471 num = simple_strtol(vers, NULL, 0); 472 switch(num) { 473 case 2: 474 case 3: 475 case 4: 476 nfsd_vers(num, sign == '-' ? NFSD_CLEAR : NFSD_SET); 477 break; 478 default: 479 return -EINVAL; 480 } 481 vers += len + 1; 482 tlen += len; 483 } while ((len = qword_get(&mesg, vers, size)) > 0); 484 /* If all get turned off, turn them back on, as 485 * having no versions is BAD 486 */ 487 nfsd_reset_versions(); 488 } 489 /* Now write current state into reply buffer */ 490 len = 0; 491 sep = ""; 492 for (num=2 ; num <= 4 ; num++) 493 if (nfsd_vers(num, NFSD_AVAIL)) { 494 len += sprintf(buf+len, "%s%c%d", sep, 495 nfsd_vers(num, NFSD_TEST)?'+':'-', 496 num); 497 sep = " "; 498 } 499 len += sprintf(buf+len, "\n"); 500 return len; 501 } 502 503 static ssize_t write_ports(struct file *file, char *buf, size_t size) 504 { 505 if (size == 0) { 506 int len = 0; 507 lock_kernel(); 508 if (nfsd_serv) 509 len = svc_xprt_names(nfsd_serv, buf, 0); 510 unlock_kernel(); 511 return len; 512 } 513 /* Either a single 'fd' number is written, in which 514 * case it must be for a socket of a supported family/protocol, 515 * and we use it as an nfsd socket, or 516 * A '-' followed by the 'name' of a socket in which case 517 * we close the socket. 518 */ 519 if (isdigit(buf[0])) { 520 char *mesg = buf; 521 int fd; 522 int err; 523 err = get_int(&mesg, &fd); 524 if (err) 525 return -EINVAL; 526 if (fd < 0) 527 return -EINVAL; 528 err = nfsd_create_serv(); 529 if (!err) { 530 int proto = 0; 531 err = svc_addsock(nfsd_serv, fd, buf, &proto); 532 if (err >= 0) { 533 err = lockd_up(proto); 534 if (err < 0) 535 svc_sock_names(buf+strlen(buf)+1, nfsd_serv, buf); 536 } 537 /* Decrease the count, but don't shutdown the 538 * the service 539 */ 540 lock_kernel(); 541 nfsd_serv->sv_nrthreads--; 542 unlock_kernel(); 543 } 544 return err < 0 ? err : 0; 545 } 546 if (buf[0] == '-' && isdigit(buf[1])) { 547 char *toclose = kstrdup(buf+1, GFP_KERNEL); 548 int len = 0; 549 if (!toclose) 550 return -ENOMEM; 551 lock_kernel(); 552 if (nfsd_serv) 553 len = svc_sock_names(buf, nfsd_serv, toclose); 554 unlock_kernel(); 555 if (len >= 0) 556 lockd_down(); 557 kfree(toclose); 558 return len; 559 } 560 /* 561 * Add a transport listener by writing it's transport name 562 */ 563 if (isalpha(buf[0])) { 564 int err; 565 char transport[16]; 566 int port; 567 if (sscanf(buf, "%15s %4d", transport, &port) == 2) { 568 err = nfsd_create_serv(); 569 if (!err) { 570 err = svc_create_xprt(nfsd_serv, 571 transport, port, 572 SVC_SOCK_ANONYMOUS); 573 if (err == -ENOENT) 574 /* Give a reasonable perror msg for 575 * bad transport string */ 576 err = -EPROTONOSUPPORT; 577 } 578 return err < 0 ? err : 0; 579 } 580 } 581 /* 582 * Remove a transport by writing it's transport name and port number 583 */ 584 if (buf[0] == '-' && isalpha(buf[1])) { 585 struct svc_xprt *xprt; 586 int err = -EINVAL; 587 char transport[16]; 588 int port; 589 if (sscanf(&buf[1], "%15s %4d", transport, &port) == 2) { 590 if (port == 0) 591 return -EINVAL; 592 lock_kernel(); 593 if (nfsd_serv) { 594 xprt = svc_find_xprt(nfsd_serv, transport, 595 AF_UNSPEC, port); 596 if (xprt) { 597 svc_close_xprt(xprt); 598 svc_xprt_put(xprt); 599 err = 0; 600 } else 601 err = -ENOTCONN; 602 } 603 unlock_kernel(); 604 return err < 0 ? err : 0; 605 } 606 } 607 return -EINVAL; 608 } 609 610 int nfsd_max_blksize; 611 612 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 613 { 614 char *mesg = buf; 615 if (size > 0) { 616 int bsize; 617 int rv = get_int(&mesg, &bsize); 618 if (rv) 619 return rv; 620 /* force bsize into allowed range and 621 * required alignment. 622 */ 623 if (bsize < 1024) 624 bsize = 1024; 625 if (bsize > NFSSVC_MAXBLKSIZE) 626 bsize = NFSSVC_MAXBLKSIZE; 627 bsize &= ~(1024-1); 628 lock_kernel(); 629 if (nfsd_serv && nfsd_serv->sv_nrthreads) { 630 unlock_kernel(); 631 return -EBUSY; 632 } 633 nfsd_max_blksize = bsize; 634 unlock_kernel(); 635 } 636 return sprintf(buf, "%d\n", nfsd_max_blksize); 637 } 638 639 #ifdef CONFIG_NFSD_V4 640 extern time_t nfs4_leasetime(void); 641 642 static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 643 { 644 /* if size > 10 seconds, call 645 * nfs4_reset_lease() then write out the new lease (seconds) as reply 646 */ 647 char *mesg = buf; 648 int rv; 649 650 if (size > 0) { 651 int lease; 652 rv = get_int(&mesg, &lease); 653 if (rv) 654 return rv; 655 if (lease < 10 || lease > 3600) 656 return -EINVAL; 657 nfs4_reset_lease(lease); 658 } 659 sprintf(buf, "%ld\n", nfs4_lease_time()); 660 return strlen(buf); 661 } 662 663 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 664 { 665 char *mesg = buf; 666 char *recdir; 667 int len, status; 668 669 if (size == 0 || size > PATH_MAX || buf[size-1] != '\n') 670 return -EINVAL; 671 buf[size-1] = 0; 672 673 recdir = mesg; 674 len = qword_get(&mesg, recdir, size); 675 if (len <= 0) 676 return -EINVAL; 677 678 status = nfs4_reset_recoverydir(recdir); 679 return strlen(buf); 680 } 681 #endif 682 683 /*----------------------------------------------------------------------------*/ 684 /* 685 * populating the filesystem. 686 */ 687 688 static int nfsd_fill_super(struct super_block * sb, void * data, int silent) 689 { 690 static struct tree_descr nfsd_files[] = { 691 [NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR}, 692 [NFSD_Add] = {".add", &transaction_ops, S_IWUSR}, 693 [NFSD_Del] = {".del", &transaction_ops, S_IWUSR}, 694 [NFSD_Export] = {".export", &transaction_ops, S_IWUSR}, 695 [NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR}, 696 [NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR}, 697 [NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR}, 698 [NFSD_List] = {"exports", &exports_operations, S_IRUGO}, 699 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 700 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 701 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 702 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 703 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 704 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 705 #ifdef CONFIG_NFSD_V4 706 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 707 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 708 #endif 709 /* last one */ {""} 710 }; 711 return simple_fill_super(sb, 0x6e667364, nfsd_files); 712 } 713 714 static int nfsd_get_sb(struct file_system_type *fs_type, 715 int flags, const char *dev_name, void *data, struct vfsmount *mnt) 716 { 717 return get_sb_single(fs_type, flags, data, nfsd_fill_super, mnt); 718 } 719 720 static struct file_system_type nfsd_fs_type = { 721 .owner = THIS_MODULE, 722 .name = "nfsd", 723 .get_sb = nfsd_get_sb, 724 .kill_sb = kill_litter_super, 725 }; 726 727 #ifdef CONFIG_PROC_FS 728 static int create_proc_exports_entry(void) 729 { 730 struct proc_dir_entry *entry; 731 732 entry = proc_mkdir("fs/nfs", NULL); 733 if (!entry) 734 return -ENOMEM; 735 entry = create_proc_entry("fs/nfs/exports", 0, NULL); 736 if (!entry) 737 return -ENOMEM; 738 entry->proc_fops = &exports_operations; 739 return 0; 740 } 741 #else /* CONFIG_PROC_FS */ 742 static int create_proc_exports_entry(void) 743 { 744 return 0; 745 } 746 #endif 747 748 static int __init init_nfsd(void) 749 { 750 int retval; 751 printk(KERN_INFO "Installing knfsd (copyright (C) 1996 okir@monad.swb.de).\n"); 752 753 retval = nfs4_state_init(); /* nfs4 locking state */ 754 if (retval) 755 return retval; 756 nfsd_stat_init(); /* Statistics */ 757 retval = nfsd_reply_cache_init(); 758 if (retval) 759 goto out_free_stat; 760 retval = nfsd_export_init(); 761 if (retval) 762 goto out_free_cache; 763 nfsd_lockd_init(); /* lockd->nfsd callbacks */ 764 retval = nfsd_idmap_init(); 765 if (retval) 766 goto out_free_lockd; 767 retval = create_proc_exports_entry(); 768 if (retval) 769 goto out_free_idmap; 770 retval = register_filesystem(&nfsd_fs_type); 771 if (retval) 772 goto out_free_all; 773 return 0; 774 out_free_all: 775 remove_proc_entry("fs/nfs/exports", NULL); 776 remove_proc_entry("fs/nfs", NULL); 777 out_free_idmap: 778 nfsd_idmap_shutdown(); 779 out_free_lockd: 780 nfsd_lockd_shutdown(); 781 nfsd_export_shutdown(); 782 out_free_cache: 783 nfsd_reply_cache_shutdown(); 784 out_free_stat: 785 nfsd_stat_shutdown(); 786 nfsd4_free_slabs(); 787 return retval; 788 } 789 790 static void __exit exit_nfsd(void) 791 { 792 nfsd_export_shutdown(); 793 nfsd_reply_cache_shutdown(); 794 remove_proc_entry("fs/nfs/exports", NULL); 795 remove_proc_entry("fs/nfs", NULL); 796 nfsd_stat_shutdown(); 797 nfsd_lockd_shutdown(); 798 nfsd_idmap_shutdown(); 799 nfsd4_free_slabs(); 800 unregister_filesystem(&nfsd_fs_type); 801 } 802 803 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 804 MODULE_LICENSE("GPL"); 805 module_init(init_nfsd) 806 module_exit(exit_nfsd) 807