1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Syscall interface to knfsd. 4 * 5 * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de> 6 */ 7 8 #include <linux/slab.h> 9 #include <linux/namei.h> 10 #include <linux/ctype.h> 11 #include <linux/fs_context.h> 12 13 #include <linux/sunrpc/svcsock.h> 14 #include <linux/lockd/lockd.h> 15 #include <linux/sunrpc/addr.h> 16 #include <linux/sunrpc/gss_api.h> 17 #include <linux/sunrpc/gss_krb5_enctypes.h> 18 #include <linux/sunrpc/rpc_pipe_fs.h> 19 #include <linux/module.h> 20 #include <linux/fsnotify.h> 21 22 #include "idmap.h" 23 #include "nfsd.h" 24 #include "cache.h" 25 #include "state.h" 26 #include "netns.h" 27 #include "pnfs.h" 28 #include "filecache.h" 29 30 /* 31 * We have a single directory with several nodes in it. 32 */ 33 enum { 34 NFSD_Root = 1, 35 NFSD_List, 36 NFSD_Export_Stats, 37 NFSD_Export_features, 38 NFSD_Fh, 39 NFSD_FO_UnlockIP, 40 NFSD_FO_UnlockFS, 41 NFSD_Threads, 42 NFSD_Pool_Threads, 43 NFSD_Pool_Stats, 44 NFSD_Reply_Cache_Stats, 45 NFSD_Versions, 46 NFSD_Ports, 47 NFSD_MaxBlkSize, 48 NFSD_MaxConnections, 49 NFSD_Filecache, 50 NFSD_SupportedEnctypes, 51 /* 52 * The below MUST come last. Otherwise we leave a hole in nfsd_files[] 53 * with !CONFIG_NFSD_V4 and simple_fill_super() goes oops 54 */ 55 #ifdef CONFIG_NFSD_V4 56 NFSD_Leasetime, 57 NFSD_Gracetime, 58 NFSD_RecoveryDir, 59 NFSD_V4EndGrace, 60 #endif 61 NFSD_MaxReserved 62 }; 63 64 /* 65 * write() for these nodes. 66 */ 67 static ssize_t write_filehandle(struct file *file, char *buf, size_t size); 68 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size); 69 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size); 70 static ssize_t write_threads(struct file *file, char *buf, size_t size); 71 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size); 72 static ssize_t write_versions(struct file *file, char *buf, size_t size); 73 static ssize_t write_ports(struct file *file, char *buf, size_t size); 74 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size); 75 static ssize_t write_maxconn(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 static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); 81 #endif 82 83 static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 84 [NFSD_Fh] = write_filehandle, 85 [NFSD_FO_UnlockIP] = write_unlock_ip, 86 [NFSD_FO_UnlockFS] = write_unlock_fs, 87 [NFSD_Threads] = write_threads, 88 [NFSD_Pool_Threads] = write_pool_threads, 89 [NFSD_Versions] = write_versions, 90 [NFSD_Ports] = write_ports, 91 [NFSD_MaxBlkSize] = write_maxblksize, 92 [NFSD_MaxConnections] = write_maxconn, 93 #ifdef CONFIG_NFSD_V4 94 [NFSD_Leasetime] = write_leasetime, 95 [NFSD_Gracetime] = write_gracetime, 96 [NFSD_RecoveryDir] = write_recoverydir, 97 [NFSD_V4EndGrace] = write_v4_end_grace, 98 #endif 99 }; 100 101 static ssize_t nfsctl_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 102 { 103 ino_t ino = file_inode(file)->i_ino; 104 char *data; 105 ssize_t rv; 106 107 if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 108 return -EINVAL; 109 110 data = simple_transaction_get(file, buf, size); 111 if (IS_ERR(data)) 112 return PTR_ERR(data); 113 114 rv = write_op[ino](file, data, size); 115 if (rv >= 0) { 116 simple_transaction_set(file, rv); 117 rv = size; 118 } 119 return rv; 120 } 121 122 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos) 123 { 124 if (! file->private_data) { 125 /* An attempt to read a transaction file without writing 126 * causes a 0-byte write so that the file can return 127 * state information 128 */ 129 ssize_t rv = nfsctl_transaction_write(file, buf, 0, pos); 130 if (rv < 0) 131 return rv; 132 } 133 return simple_transaction_read(file, buf, size, pos); 134 } 135 136 static const struct file_operations transaction_ops = { 137 .write = nfsctl_transaction_write, 138 .read = nfsctl_transaction_read, 139 .release = simple_transaction_release, 140 .llseek = default_llseek, 141 }; 142 143 static int exports_net_open(struct net *net, struct file *file) 144 { 145 int err; 146 struct seq_file *seq; 147 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 148 149 err = seq_open(file, &nfs_exports_op); 150 if (err) 151 return err; 152 153 seq = file->private_data; 154 seq->private = nn->svc_export_cache; 155 return 0; 156 } 157 158 static int exports_proc_open(struct inode *inode, struct file *file) 159 { 160 return exports_net_open(current->nsproxy->net_ns, file); 161 } 162 163 static const struct proc_ops exports_proc_ops = { 164 .proc_open = exports_proc_open, 165 .proc_read = seq_read, 166 .proc_lseek = seq_lseek, 167 .proc_release = seq_release, 168 }; 169 170 static int exports_nfsd_open(struct inode *inode, struct file *file) 171 { 172 return exports_net_open(inode->i_sb->s_fs_info, file); 173 } 174 175 static const struct file_operations exports_nfsd_operations = { 176 .open = exports_nfsd_open, 177 .read = seq_read, 178 .llseek = seq_lseek, 179 .release = seq_release, 180 }; 181 182 static int export_features_show(struct seq_file *m, void *v) 183 { 184 seq_printf(m, "0x%x 0x%x\n", NFSEXP_ALLFLAGS, NFSEXP_SECINFO_FLAGS); 185 return 0; 186 } 187 188 DEFINE_SHOW_ATTRIBUTE(export_features); 189 190 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 191 static int supported_enctypes_show(struct seq_file *m, void *v) 192 { 193 seq_printf(m, KRB5_SUPPORTED_ENCTYPES); 194 return 0; 195 } 196 197 DEFINE_SHOW_ATTRIBUTE(supported_enctypes); 198 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 199 200 static const struct file_operations pool_stats_operations = { 201 .open = nfsd_pool_stats_open, 202 .read = seq_read, 203 .llseek = seq_lseek, 204 .release = nfsd_pool_stats_release, 205 }; 206 207 DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); 208 209 DEFINE_SHOW_ATTRIBUTE(nfsd_file_cache_stats); 210 211 /*----------------------------------------------------------------------------*/ 212 /* 213 * payload - write methods 214 */ 215 216 static inline struct net *netns(struct file *file) 217 { 218 return file_inode(file)->i_sb->s_fs_info; 219 } 220 221 /* 222 * write_unlock_ip - Release all locks used by a client 223 * 224 * Experimental. 225 * 226 * Input: 227 * buf: '\n'-terminated C string containing a 228 * presentation format IP address 229 * size: length of C string in @buf 230 * Output: 231 * On success: returns zero if all specified locks were released; 232 * returns one if one or more locks were not released 233 * On error: return code is negative errno value 234 */ 235 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size) 236 { 237 struct sockaddr_storage address; 238 struct sockaddr *sap = (struct sockaddr *)&address; 239 size_t salen = sizeof(address); 240 char *fo_path; 241 struct net *net = netns(file); 242 243 /* sanity check */ 244 if (size == 0) 245 return -EINVAL; 246 247 if (buf[size-1] != '\n') 248 return -EINVAL; 249 250 fo_path = buf; 251 if (qword_get(&buf, fo_path, size) < 0) 252 return -EINVAL; 253 254 if (rpc_pton(net, fo_path, size, sap, salen) == 0) 255 return -EINVAL; 256 257 return nlmsvc_unlock_all_by_ip(sap); 258 } 259 260 /* 261 * write_unlock_fs - Release all locks on a local file system 262 * 263 * Experimental. 264 * 265 * Input: 266 * buf: '\n'-terminated C string containing the 267 * absolute pathname of a local file system 268 * size: length of C string in @buf 269 * Output: 270 * On success: returns zero if all specified locks were released; 271 * returns one if one or more locks were not released 272 * On error: return code is negative errno value 273 */ 274 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size) 275 { 276 struct path path; 277 char *fo_path; 278 int error; 279 280 /* sanity check */ 281 if (size == 0) 282 return -EINVAL; 283 284 if (buf[size-1] != '\n') 285 return -EINVAL; 286 287 fo_path = buf; 288 if (qword_get(&buf, fo_path, size) < 0) 289 return -EINVAL; 290 291 error = kern_path(fo_path, 0, &path); 292 if (error) 293 return error; 294 295 /* 296 * XXX: Needs better sanity checking. Otherwise we could end up 297 * releasing locks on the wrong file system. 298 * 299 * For example: 300 * 1. Does the path refer to a directory? 301 * 2. Is that directory a mount point, or 302 * 3. Is that directory the root of an exported file system? 303 */ 304 error = nlmsvc_unlock_all_by_sb(path.dentry->d_sb); 305 306 path_put(&path); 307 return error; 308 } 309 310 /* 311 * write_filehandle - Get a variable-length NFS file handle by path 312 * 313 * On input, the buffer contains a '\n'-terminated C string comprised of 314 * three alphanumeric words separated by whitespace. The string may 315 * contain escape sequences. 316 * 317 * Input: 318 * buf: 319 * domain: client domain name 320 * path: export pathname 321 * maxsize: numeric maximum size of 322 * @buf 323 * size: length of C string in @buf 324 * Output: 325 * On success: passed-in buffer filled with '\n'-terminated C 326 * string containing a ASCII hex text version 327 * of the NFS file handle; 328 * return code is the size in bytes of the string 329 * On error: return code is negative errno value 330 */ 331 static ssize_t write_filehandle(struct file *file, char *buf, size_t size) 332 { 333 char *dname, *path; 334 int maxsize; 335 char *mesg = buf; 336 int len; 337 struct auth_domain *dom; 338 struct knfsd_fh fh; 339 340 if (size == 0) 341 return -EINVAL; 342 343 if (buf[size-1] != '\n') 344 return -EINVAL; 345 buf[size-1] = 0; 346 347 dname = mesg; 348 len = qword_get(&mesg, dname, size); 349 if (len <= 0) 350 return -EINVAL; 351 352 path = dname+len+1; 353 len = qword_get(&mesg, path, size); 354 if (len <= 0) 355 return -EINVAL; 356 357 len = get_int(&mesg, &maxsize); 358 if (len) 359 return len; 360 361 if (maxsize < NFS_FHSIZE) 362 return -EINVAL; 363 maxsize = min(maxsize, NFS3_FHSIZE); 364 365 if (qword_get(&mesg, mesg, size)>0) 366 return -EINVAL; 367 368 /* we have all the words, they are in buf.. */ 369 dom = unix_domain_find(dname); 370 if (!dom) 371 return -ENOMEM; 372 373 len = exp_rootfh(netns(file), dom, path, &fh, maxsize); 374 auth_domain_put(dom); 375 if (len) 376 return len; 377 378 mesg = buf; 379 len = SIMPLE_TRANSACTION_LIMIT; 380 qword_addhex(&mesg, &len, fh.fh_raw, fh.fh_size); 381 mesg[-1] = '\n'; 382 return mesg - buf; 383 } 384 385 /* 386 * write_threads - Start NFSD, or report the current number of running threads 387 * 388 * Input: 389 * buf: ignored 390 * size: zero 391 * Output: 392 * On success: passed-in buffer filled with '\n'-terminated C 393 * string numeric value representing the number of 394 * running NFSD threads; 395 * return code is the size in bytes of the string 396 * On error: return code is zero 397 * 398 * OR 399 * 400 * Input: 401 * buf: C string containing an unsigned 402 * integer value representing the 403 * number of NFSD threads to start 404 * size: non-zero length of C string in @buf 405 * Output: 406 * On success: NFS service is started; 407 * passed-in buffer filled with '\n'-terminated C 408 * string numeric value representing the number of 409 * running NFSD threads; 410 * return code is the size in bytes of the string 411 * On error: return code is zero or a negative errno value 412 */ 413 static ssize_t write_threads(struct file *file, char *buf, size_t size) 414 { 415 char *mesg = buf; 416 int rv; 417 struct net *net = netns(file); 418 419 if (size > 0) { 420 int newthreads; 421 rv = get_int(&mesg, &newthreads); 422 if (rv) 423 return rv; 424 if (newthreads < 0) 425 return -EINVAL; 426 rv = nfsd_svc(newthreads, net, file->f_cred); 427 if (rv < 0) 428 return rv; 429 } else 430 rv = nfsd_nrthreads(net); 431 432 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", rv); 433 } 434 435 /* 436 * write_pool_threads - Set or report the current number of threads per pool 437 * 438 * Input: 439 * buf: ignored 440 * size: zero 441 * 442 * OR 443 * 444 * Input: 445 * buf: C string containing whitespace- 446 * separated unsigned integer values 447 * representing the number of NFSD 448 * threads to start in each pool 449 * size: non-zero length of C string in @buf 450 * Output: 451 * On success: passed-in buffer filled with '\n'-terminated C 452 * string containing integer values representing the 453 * number of NFSD threads in each pool; 454 * return code is the size in bytes of the string 455 * On error: return code is zero or a negative errno value 456 */ 457 static ssize_t write_pool_threads(struct file *file, char *buf, size_t size) 458 { 459 /* if size > 0, look for an array of number of threads per node 460 * and apply them then write out number of threads per node as reply 461 */ 462 char *mesg = buf; 463 int i; 464 int rv; 465 int len; 466 int npools; 467 int *nthreads; 468 struct net *net = netns(file); 469 470 mutex_lock(&nfsd_mutex); 471 npools = nfsd_nrpools(net); 472 if (npools == 0) { 473 /* 474 * NFS is shut down. The admin can start it by 475 * writing to the threads file but NOT the pool_threads 476 * file, sorry. Report zero threads. 477 */ 478 mutex_unlock(&nfsd_mutex); 479 strcpy(buf, "0\n"); 480 return strlen(buf); 481 } 482 483 nthreads = kcalloc(npools, sizeof(int), GFP_KERNEL); 484 rv = -ENOMEM; 485 if (nthreads == NULL) 486 goto out_free; 487 488 if (size > 0) { 489 for (i = 0; i < npools; i++) { 490 rv = get_int(&mesg, &nthreads[i]); 491 if (rv == -ENOENT) 492 break; /* fewer numbers than pools */ 493 if (rv) 494 goto out_free; /* syntax error */ 495 rv = -EINVAL; 496 if (nthreads[i] < 0) 497 goto out_free; 498 } 499 rv = nfsd_set_nrthreads(i, nthreads, net); 500 if (rv) 501 goto out_free; 502 } 503 504 rv = nfsd_get_nrthreads(npools, nthreads, net); 505 if (rv) 506 goto out_free; 507 508 mesg = buf; 509 size = SIMPLE_TRANSACTION_LIMIT; 510 for (i = 0; i < npools && size > 0; i++) { 511 snprintf(mesg, size, "%d%c", nthreads[i], (i == npools-1 ? '\n' : ' ')); 512 len = strlen(mesg); 513 size -= len; 514 mesg += len; 515 } 516 rv = mesg - buf; 517 out_free: 518 kfree(nthreads); 519 mutex_unlock(&nfsd_mutex); 520 return rv; 521 } 522 523 static ssize_t 524 nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining, 525 const char *sep, unsigned vers, int minor) 526 { 527 const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u"; 528 bool supported = !!nfsd_vers(nn, vers, NFSD_TEST); 529 530 if (vers == 4 && minor >= 0 && 531 !nfsd_minorversion(nn, minor, NFSD_TEST)) 532 supported = false; 533 if (minor == 0 && supported) 534 /* 535 * special case for backward compatability. 536 * +4.0 is never reported, it is implied by 537 * +4, unless -4.0 is present. 538 */ 539 return 0; 540 return snprintf(buf, remaining, format, sep, 541 supported ? '+' : '-', vers, minor); 542 } 543 544 static ssize_t __write_versions(struct file *file, char *buf, size_t size) 545 { 546 char *mesg = buf; 547 char *vers, *minorp, sign; 548 int len, num, remaining; 549 ssize_t tlen = 0; 550 char *sep; 551 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 552 553 if (size>0) { 554 if (nn->nfsd_serv) 555 /* Cannot change versions without updating 556 * nn->nfsd_serv->sv_xdrsize, and reallocing 557 * rq_argp and rq_resp 558 */ 559 return -EBUSY; 560 if (buf[size-1] != '\n') 561 return -EINVAL; 562 buf[size-1] = 0; 563 564 vers = mesg; 565 len = qword_get(&mesg, vers, size); 566 if (len <= 0) return -EINVAL; 567 do { 568 enum vers_op cmd; 569 unsigned minor; 570 sign = *vers; 571 if (sign == '+' || sign == '-') 572 num = simple_strtol((vers+1), &minorp, 0); 573 else 574 num = simple_strtol(vers, &minorp, 0); 575 if (*minorp == '.') { 576 if (num != 4) 577 return -EINVAL; 578 if (kstrtouint(minorp+1, 0, &minor) < 0) 579 return -EINVAL; 580 } 581 582 cmd = sign == '-' ? NFSD_CLEAR : NFSD_SET; 583 switch(num) { 584 case 2: 585 case 3: 586 nfsd_vers(nn, num, cmd); 587 break; 588 case 4: 589 if (*minorp == '.') { 590 if (nfsd_minorversion(nn, minor, cmd) < 0) 591 return -EINVAL; 592 } else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) { 593 /* 594 * Either we have +4 and no minors are enabled, 595 * or we have -4 and at least one minor is enabled. 596 * In either case, propagate 'cmd' to all minors. 597 */ 598 minor = 0; 599 while (nfsd_minorversion(nn, minor, cmd) >= 0) 600 minor++; 601 } 602 break; 603 default: 604 return -EINVAL; 605 } 606 vers += len + 1; 607 } while ((len = qword_get(&mesg, vers, size)) > 0); 608 /* If all get turned off, turn them back on, as 609 * having no versions is BAD 610 */ 611 nfsd_reset_versions(nn); 612 } 613 614 /* Now write current state into reply buffer */ 615 sep = ""; 616 remaining = SIMPLE_TRANSACTION_LIMIT; 617 for (num=2 ; num <= 4 ; num++) { 618 int minor; 619 if (!nfsd_vers(nn, num, NFSD_AVAIL)) 620 continue; 621 622 minor = -1; 623 do { 624 len = nfsd_print_version_support(nn, buf, remaining, 625 sep, num, minor); 626 if (len >= remaining) 627 goto out; 628 remaining -= len; 629 buf += len; 630 tlen += len; 631 minor++; 632 if (len) 633 sep = " "; 634 } while (num == 4 && minor <= NFSD_SUPPORTED_MINOR_VERSION); 635 } 636 out: 637 len = snprintf(buf, remaining, "\n"); 638 if (len >= remaining) 639 return -EINVAL; 640 return tlen + len; 641 } 642 643 /* 644 * write_versions - Set or report the available NFS protocol versions 645 * 646 * Input: 647 * buf: ignored 648 * size: zero 649 * Output: 650 * On success: passed-in buffer filled with '\n'-terminated C 651 * string containing positive or negative integer 652 * values representing the current status of each 653 * protocol version; 654 * return code is the size in bytes of the string 655 * On error: return code is zero or a negative errno value 656 * 657 * OR 658 * 659 * Input: 660 * buf: C string containing whitespace- 661 * separated positive or negative 662 * integer values representing NFS 663 * protocol versions to enable ("+n") 664 * or disable ("-n") 665 * size: non-zero length of C string in @buf 666 * Output: 667 * On success: status of zero or more protocol versions has 668 * been updated; passed-in buffer filled with 669 * '\n'-terminated C string containing positive 670 * or negative integer values representing the 671 * current status of each protocol version; 672 * return code is the size in bytes of the string 673 * On error: return code is zero or a negative errno value 674 */ 675 static ssize_t write_versions(struct file *file, char *buf, size_t size) 676 { 677 ssize_t rv; 678 679 mutex_lock(&nfsd_mutex); 680 rv = __write_versions(file, buf, size); 681 mutex_unlock(&nfsd_mutex); 682 return rv; 683 } 684 685 /* 686 * Zero-length write. Return a list of NFSD's current listener 687 * transports. 688 */ 689 static ssize_t __write_ports_names(char *buf, struct net *net) 690 { 691 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 692 693 if (nn->nfsd_serv == NULL) 694 return 0; 695 return svc_xprt_names(nn->nfsd_serv, buf, SIMPLE_TRANSACTION_LIMIT); 696 } 697 698 /* 699 * A single 'fd' number was written, in which case it must be for 700 * a socket of a supported family/protocol, and we use it as an 701 * nfsd listener. 702 */ 703 static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred) 704 { 705 char *mesg = buf; 706 int fd, err; 707 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 708 709 err = get_int(&mesg, &fd); 710 if (err != 0 || fd < 0) 711 return -EINVAL; 712 713 if (svc_alien_sock(net, fd)) { 714 printk(KERN_ERR "%s: socket net is different to NFSd's one\n", __func__); 715 return -EINVAL; 716 } 717 718 err = nfsd_create_serv(net); 719 if (err != 0) 720 return err; 721 722 err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); 723 724 if (err >= 0 && 725 !nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 726 svc_get(nn->nfsd_serv); 727 728 nfsd_put(net); 729 return err; 730 } 731 732 /* 733 * A transport listener is added by writing it's transport name and 734 * a port number. 735 */ 736 static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred) 737 { 738 char transport[16]; 739 struct svc_xprt *xprt; 740 int port, err; 741 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 742 743 if (sscanf(buf, "%15s %5u", transport, &port) != 2) 744 return -EINVAL; 745 746 if (port < 1 || port > USHRT_MAX) 747 return -EINVAL; 748 749 err = nfsd_create_serv(net); 750 if (err != 0) 751 return err; 752 753 err = svc_xprt_create(nn->nfsd_serv, transport, net, 754 PF_INET, port, SVC_SOCK_ANONYMOUS, cred); 755 if (err < 0) 756 goto out_err; 757 758 err = svc_xprt_create(nn->nfsd_serv, transport, net, 759 PF_INET6, port, SVC_SOCK_ANONYMOUS, cred); 760 if (err < 0 && err != -EAFNOSUPPORT) 761 goto out_close; 762 763 if (!nn->nfsd_serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) 764 svc_get(nn->nfsd_serv); 765 766 nfsd_put(net); 767 return 0; 768 out_close: 769 xprt = svc_find_xprt(nn->nfsd_serv, transport, net, PF_INET, port); 770 if (xprt != NULL) { 771 svc_xprt_close(xprt); 772 svc_xprt_put(xprt); 773 } 774 out_err: 775 nfsd_put(net); 776 return err; 777 } 778 779 static ssize_t __write_ports(struct file *file, char *buf, size_t size, 780 struct net *net) 781 { 782 if (size == 0) 783 return __write_ports_names(buf, net); 784 785 if (isdigit(buf[0])) 786 return __write_ports_addfd(buf, net, file->f_cred); 787 788 if (isalpha(buf[0])) 789 return __write_ports_addxprt(buf, net, file->f_cred); 790 791 return -EINVAL; 792 } 793 794 /* 795 * write_ports - Pass a socket file descriptor or transport name to listen on 796 * 797 * Input: 798 * buf: ignored 799 * size: zero 800 * Output: 801 * On success: passed-in buffer filled with a '\n'-terminated C 802 * string containing a whitespace-separated list of 803 * named NFSD listeners; 804 * return code is the size in bytes of the string 805 * On error: return code is zero or a negative errno value 806 * 807 * OR 808 * 809 * Input: 810 * buf: C string containing an unsigned 811 * integer value representing a bound 812 * but unconnected socket that is to be 813 * used as an NFSD listener; listen(3) 814 * must be called for a SOCK_STREAM 815 * socket, otherwise it is ignored 816 * size: non-zero length of C string in @buf 817 * Output: 818 * On success: NFS service is started; 819 * passed-in buffer filled with a '\n'-terminated C 820 * string containing a unique alphanumeric name of 821 * the listener; 822 * return code is the size in bytes of the string 823 * On error: return code is a negative errno value 824 * 825 * OR 826 * 827 * Input: 828 * buf: C string containing a transport 829 * name and an unsigned integer value 830 * representing the port to listen on, 831 * separated by whitespace 832 * size: non-zero length of C string in @buf 833 * Output: 834 * On success: returns zero; NFS service is started 835 * On error: return code is a negative errno value 836 */ 837 static ssize_t write_ports(struct file *file, char *buf, size_t size) 838 { 839 ssize_t rv; 840 841 mutex_lock(&nfsd_mutex); 842 rv = __write_ports(file, buf, size, netns(file)); 843 mutex_unlock(&nfsd_mutex); 844 return rv; 845 } 846 847 848 int nfsd_max_blksize; 849 850 /* 851 * write_maxblksize - Set or report the current NFS blksize 852 * 853 * Input: 854 * buf: ignored 855 * size: zero 856 * 857 * OR 858 * 859 * Input: 860 * buf: C string containing an unsigned 861 * integer value representing the new 862 * NFS blksize 863 * size: non-zero length of C string in @buf 864 * Output: 865 * On success: passed-in buffer filled with '\n'-terminated C string 866 * containing numeric value of the current NFS blksize 867 * setting; 868 * return code is the size in bytes of the string 869 * On error: return code is zero or a negative errno value 870 */ 871 static ssize_t write_maxblksize(struct file *file, char *buf, size_t size) 872 { 873 char *mesg = buf; 874 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 875 876 if (size > 0) { 877 int bsize; 878 int rv = get_int(&mesg, &bsize); 879 if (rv) 880 return rv; 881 /* force bsize into allowed range and 882 * required alignment. 883 */ 884 bsize = max_t(int, bsize, 1024); 885 bsize = min_t(int, bsize, NFSSVC_MAXBLKSIZE); 886 bsize &= ~(1024-1); 887 mutex_lock(&nfsd_mutex); 888 if (nn->nfsd_serv) { 889 mutex_unlock(&nfsd_mutex); 890 return -EBUSY; 891 } 892 nfsd_max_blksize = bsize; 893 mutex_unlock(&nfsd_mutex); 894 } 895 896 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%d\n", 897 nfsd_max_blksize); 898 } 899 900 /* 901 * write_maxconn - Set or report the current max number of connections 902 * 903 * Input: 904 * buf: ignored 905 * size: zero 906 * OR 907 * 908 * Input: 909 * buf: C string containing an unsigned 910 * integer value representing the new 911 * number of max connections 912 * size: non-zero length of C string in @buf 913 * Output: 914 * On success: passed-in buffer filled with '\n'-terminated C string 915 * containing numeric value of max_connections setting 916 * for this net namespace; 917 * return code is the size in bytes of the string 918 * On error: return code is zero or a negative errno value 919 */ 920 static ssize_t write_maxconn(struct file *file, char *buf, size_t size) 921 { 922 char *mesg = buf; 923 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 924 unsigned int maxconn = nn->max_connections; 925 926 if (size > 0) { 927 int rv = get_uint(&mesg, &maxconn); 928 929 if (rv) 930 return rv; 931 nn->max_connections = maxconn; 932 } 933 934 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%u\n", maxconn); 935 } 936 937 #ifdef CONFIG_NFSD_V4 938 static ssize_t __nfsd4_write_time(struct file *file, char *buf, size_t size, 939 time64_t *time, struct nfsd_net *nn) 940 { 941 char *mesg = buf; 942 int rv, i; 943 944 if (size > 0) { 945 if (nn->nfsd_serv) 946 return -EBUSY; 947 rv = get_int(&mesg, &i); 948 if (rv) 949 return rv; 950 /* 951 * Some sanity checking. We don't have a reason for 952 * these particular numbers, but problems with the 953 * extremes are: 954 * - Too short: the briefest network outage may 955 * cause clients to lose all their locks. Also, 956 * the frequent polling may be wasteful. 957 * - Too long: do you really want reboot recovery 958 * to take more than an hour? Or to make other 959 * clients wait an hour before being able to 960 * revoke a dead client's locks? 961 */ 962 if (i < 10 || i > 3600) 963 return -EINVAL; 964 *time = i; 965 } 966 967 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%lld\n", *time); 968 } 969 970 static ssize_t nfsd4_write_time(struct file *file, char *buf, size_t size, 971 time64_t *time, struct nfsd_net *nn) 972 { 973 ssize_t rv; 974 975 mutex_lock(&nfsd_mutex); 976 rv = __nfsd4_write_time(file, buf, size, time, nn); 977 mutex_unlock(&nfsd_mutex); 978 return rv; 979 } 980 981 /* 982 * write_leasetime - Set or report the current NFSv4 lease time 983 * 984 * Input: 985 * buf: ignored 986 * size: zero 987 * 988 * OR 989 * 990 * Input: 991 * buf: C string containing an unsigned 992 * integer value representing the new 993 * NFSv4 lease expiry time 994 * size: non-zero length of C string in @buf 995 * Output: 996 * On success: passed-in buffer filled with '\n'-terminated C 997 * string containing unsigned integer value of the 998 * current lease expiry time; 999 * return code is the size in bytes of the string 1000 * On error: return code is zero or a negative errno value 1001 */ 1002 static ssize_t write_leasetime(struct file *file, char *buf, size_t size) 1003 { 1004 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 1005 return nfsd4_write_time(file, buf, size, &nn->nfsd4_lease, nn); 1006 } 1007 1008 /* 1009 * write_gracetime - Set or report current NFSv4 grace period time 1010 * 1011 * As above, but sets the time of the NFSv4 grace period. 1012 * 1013 * Note this should never be set to less than the *previous* 1014 * lease-period time, but we don't try to enforce this. (In the common 1015 * case (a new boot), we don't know what the previous lease time was 1016 * anyway.) 1017 */ 1018 static ssize_t write_gracetime(struct file *file, char *buf, size_t size) 1019 { 1020 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 1021 return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); 1022 } 1023 1024 static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, 1025 struct nfsd_net *nn) 1026 { 1027 char *mesg = buf; 1028 char *recdir; 1029 int len, status; 1030 1031 if (size > 0) { 1032 if (nn->nfsd_serv) 1033 return -EBUSY; 1034 if (size > PATH_MAX || buf[size-1] != '\n') 1035 return -EINVAL; 1036 buf[size-1] = 0; 1037 1038 recdir = mesg; 1039 len = qword_get(&mesg, recdir, size); 1040 if (len <= 0) 1041 return -EINVAL; 1042 1043 status = nfs4_reset_recoverydir(recdir); 1044 if (status) 1045 return status; 1046 } 1047 1048 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%s\n", 1049 nfs4_recoverydir()); 1050 } 1051 1052 /* 1053 * write_recoverydir - Set or report the pathname of the recovery directory 1054 * 1055 * Input: 1056 * buf: ignored 1057 * size: zero 1058 * 1059 * OR 1060 * 1061 * Input: 1062 * buf: C string containing the pathname 1063 * of the directory on a local file 1064 * system containing permanent NFSv4 1065 * recovery data 1066 * size: non-zero length of C string in @buf 1067 * Output: 1068 * On success: passed-in buffer filled with '\n'-terminated C string 1069 * containing the current recovery pathname setting; 1070 * return code is the size in bytes of the string 1071 * On error: return code is zero or a negative errno value 1072 */ 1073 static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) 1074 { 1075 ssize_t rv; 1076 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 1077 1078 mutex_lock(&nfsd_mutex); 1079 rv = __write_recoverydir(file, buf, size, nn); 1080 mutex_unlock(&nfsd_mutex); 1081 return rv; 1082 } 1083 1084 /* 1085 * write_v4_end_grace - release grace period for nfsd's v4.x lock manager 1086 * 1087 * Input: 1088 * buf: ignored 1089 * size: zero 1090 * OR 1091 * 1092 * Input: 1093 * buf: any value 1094 * size: non-zero length of C string in @buf 1095 * Output: 1096 * passed-in buffer filled with "Y" or "N" with a newline 1097 * and NULL-terminated C string. This indicates whether 1098 * the grace period has ended in the current net 1099 * namespace. Return code is the size in bytes of the 1100 * string. Writing a string that starts with 'Y', 'y', or 1101 * '1' to the file will end the grace period for nfsd's v4 1102 * lock manager. 1103 */ 1104 static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) 1105 { 1106 struct nfsd_net *nn = net_generic(netns(file), nfsd_net_id); 1107 1108 if (size > 0) { 1109 switch(buf[0]) { 1110 case 'Y': 1111 case 'y': 1112 case '1': 1113 if (!nn->nfsd_serv) 1114 return -EBUSY; 1115 nfsd4_end_grace(nn); 1116 break; 1117 default: 1118 return -EINVAL; 1119 } 1120 } 1121 1122 return scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, "%c\n", 1123 nn->grace_ended ? 'Y' : 'N'); 1124 } 1125 1126 #endif 1127 1128 /*----------------------------------------------------------------------------*/ 1129 /* 1130 * populating the filesystem. 1131 */ 1132 1133 /* Basically copying rpc_get_inode. */ 1134 static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode) 1135 { 1136 struct inode *inode = new_inode(sb); 1137 if (!inode) 1138 return NULL; 1139 /* Following advice from simple_fill_super documentation: */ 1140 inode->i_ino = iunique(sb, NFSD_MaxReserved); 1141 inode->i_mode = mode; 1142 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 1143 switch (mode & S_IFMT) { 1144 case S_IFDIR: 1145 inode->i_fop = &simple_dir_operations; 1146 inode->i_op = &simple_dir_inode_operations; 1147 inc_nlink(inode); 1148 break; 1149 default: 1150 break; 1151 } 1152 return inode; 1153 } 1154 1155 static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode, struct nfsdfs_client *ncl) 1156 { 1157 struct inode *inode; 1158 1159 inode = nfsd_get_inode(dir->i_sb, mode); 1160 if (!inode) 1161 return -ENOMEM; 1162 if (ncl) { 1163 inode->i_private = ncl; 1164 kref_get(&ncl->cl_ref); 1165 } 1166 d_add(dentry, inode); 1167 inc_nlink(dir); 1168 fsnotify_mkdir(dir, dentry); 1169 return 0; 1170 } 1171 1172 static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name) 1173 { 1174 struct inode *dir = parent->d_inode; 1175 struct dentry *dentry; 1176 int ret = -ENOMEM; 1177 1178 inode_lock(dir); 1179 dentry = d_alloc_name(parent, name); 1180 if (!dentry) 1181 goto out_err; 1182 ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600, ncl); 1183 if (ret) 1184 goto out_err; 1185 out: 1186 inode_unlock(dir); 1187 return dentry; 1188 out_err: 1189 dput(dentry); 1190 dentry = ERR_PTR(ret); 1191 goto out; 1192 } 1193 1194 static void clear_ncl(struct inode *inode) 1195 { 1196 struct nfsdfs_client *ncl = inode->i_private; 1197 1198 inode->i_private = NULL; 1199 kref_put(&ncl->cl_ref, ncl->cl_release); 1200 } 1201 1202 static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode) 1203 { 1204 struct nfsdfs_client *nc = inode->i_private; 1205 1206 if (nc) 1207 kref_get(&nc->cl_ref); 1208 return nc; 1209 } 1210 1211 struct nfsdfs_client *get_nfsdfs_client(struct inode *inode) 1212 { 1213 struct nfsdfs_client *nc; 1214 1215 inode_lock_shared(inode); 1216 nc = __get_nfsdfs_client(inode); 1217 inode_unlock_shared(inode); 1218 return nc; 1219 } 1220 /* from __rpc_unlink */ 1221 static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry) 1222 { 1223 int ret; 1224 1225 clear_ncl(d_inode(dentry)); 1226 dget(dentry); 1227 ret = simple_unlink(dir, dentry); 1228 d_drop(dentry); 1229 fsnotify_unlink(dir, dentry); 1230 dput(dentry); 1231 WARN_ON_ONCE(ret); 1232 } 1233 1234 static void nfsdfs_remove_files(struct dentry *root) 1235 { 1236 struct dentry *dentry, *tmp; 1237 1238 list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) { 1239 if (!simple_positive(dentry)) { 1240 WARN_ON_ONCE(1); /* I think this can't happen? */ 1241 continue; 1242 } 1243 nfsdfs_remove_file(d_inode(root), dentry); 1244 } 1245 } 1246 1247 /* XXX: cut'n'paste from simple_fill_super; figure out if we could share 1248 * code instead. */ 1249 static int nfsdfs_create_files(struct dentry *root, 1250 const struct tree_descr *files, 1251 struct dentry **fdentries) 1252 { 1253 struct inode *dir = d_inode(root); 1254 struct inode *inode; 1255 struct dentry *dentry; 1256 int i; 1257 1258 inode_lock(dir); 1259 for (i = 0; files->name && files->name[0]; i++, files++) { 1260 dentry = d_alloc_name(root, files->name); 1261 if (!dentry) 1262 goto out; 1263 inode = nfsd_get_inode(d_inode(root)->i_sb, 1264 S_IFREG | files->mode); 1265 if (!inode) { 1266 dput(dentry); 1267 goto out; 1268 } 1269 inode->i_fop = files->ops; 1270 inode->i_private = __get_nfsdfs_client(dir); 1271 d_add(dentry, inode); 1272 fsnotify_create(dir, dentry); 1273 if (fdentries) 1274 fdentries[i] = dentry; 1275 } 1276 inode_unlock(dir); 1277 return 0; 1278 out: 1279 nfsdfs_remove_files(root); 1280 inode_unlock(dir); 1281 return -ENOMEM; 1282 } 1283 1284 /* on success, returns positive number unique to that client. */ 1285 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, 1286 struct nfsdfs_client *ncl, u32 id, 1287 const struct tree_descr *files, 1288 struct dentry **fdentries) 1289 { 1290 struct dentry *dentry; 1291 char name[11]; 1292 int ret; 1293 1294 sprintf(name, "%u", id); 1295 1296 dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name); 1297 if (IS_ERR(dentry)) /* XXX: tossing errors? */ 1298 return NULL; 1299 ret = nfsdfs_create_files(dentry, files, fdentries); 1300 if (ret) { 1301 nfsd_client_rmdir(dentry); 1302 return NULL; 1303 } 1304 return dentry; 1305 } 1306 1307 /* Taken from __rpc_rmdir: */ 1308 void nfsd_client_rmdir(struct dentry *dentry) 1309 { 1310 struct inode *dir = d_inode(dentry->d_parent); 1311 struct inode *inode = d_inode(dentry); 1312 int ret; 1313 1314 inode_lock(dir); 1315 nfsdfs_remove_files(dentry); 1316 clear_ncl(inode); 1317 dget(dentry); 1318 ret = simple_rmdir(dir, dentry); 1319 WARN_ON_ONCE(ret); 1320 d_drop(dentry); 1321 fsnotify_rmdir(dir, dentry); 1322 dput(dentry); 1323 inode_unlock(dir); 1324 } 1325 1326 static int nfsd_fill_super(struct super_block *sb, struct fs_context *fc) 1327 { 1328 struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 1329 nfsd_net_id); 1330 struct dentry *dentry; 1331 int ret; 1332 1333 static const struct tree_descr nfsd_files[] = { 1334 [NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO}, 1335 /* Per-export io stats use same ops as exports file */ 1336 [NFSD_Export_Stats] = {"export_stats", &exports_nfsd_operations, S_IRUGO}, 1337 [NFSD_Export_features] = {"export_features", 1338 &export_features_fops, S_IRUGO}, 1339 [NFSD_FO_UnlockIP] = {"unlock_ip", 1340 &transaction_ops, S_IWUSR|S_IRUSR}, 1341 [NFSD_FO_UnlockFS] = {"unlock_filesystem", 1342 &transaction_ops, S_IWUSR|S_IRUSR}, 1343 [NFSD_Fh] = {"filehandle", &transaction_ops, S_IWUSR|S_IRUSR}, 1344 [NFSD_Threads] = {"threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1345 [NFSD_Pool_Threads] = {"pool_threads", &transaction_ops, S_IWUSR|S_IRUSR}, 1346 [NFSD_Pool_Stats] = {"pool_stats", &pool_stats_operations, S_IRUGO}, 1347 [NFSD_Reply_Cache_Stats] = {"reply_cache_stats", 1348 &nfsd_reply_cache_stats_fops, S_IRUGO}, 1349 [NFSD_Versions] = {"versions", &transaction_ops, S_IWUSR|S_IRUSR}, 1350 [NFSD_Ports] = {"portlist", &transaction_ops, S_IWUSR|S_IRUGO}, 1351 [NFSD_MaxBlkSize] = {"max_block_size", &transaction_ops, S_IWUSR|S_IRUGO}, 1352 [NFSD_MaxConnections] = {"max_connections", &transaction_ops, S_IWUSR|S_IRUGO}, 1353 [NFSD_Filecache] = {"filecache", &nfsd_file_cache_stats_fops, S_IRUGO}, 1354 #if defined(CONFIG_SUNRPC_GSS) || defined(CONFIG_SUNRPC_GSS_MODULE) 1355 [NFSD_SupportedEnctypes] = {"supported_krb5_enctypes", 1356 &supported_enctypes_fops, S_IRUGO}, 1357 #endif /* CONFIG_SUNRPC_GSS or CONFIG_SUNRPC_GSS_MODULE */ 1358 #ifdef CONFIG_NFSD_V4 1359 [NFSD_Leasetime] = {"nfsv4leasetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1360 [NFSD_Gracetime] = {"nfsv4gracetime", &transaction_ops, S_IWUSR|S_IRUSR}, 1361 [NFSD_RecoveryDir] = {"nfsv4recoverydir", &transaction_ops, S_IWUSR|S_IRUSR}, 1362 [NFSD_V4EndGrace] = {"v4_end_grace", &transaction_ops, S_IWUSR|S_IRUGO}, 1363 #endif 1364 /* last one */ {""} 1365 }; 1366 1367 ret = simple_fill_super(sb, 0x6e667364, nfsd_files); 1368 if (ret) 1369 return ret; 1370 dentry = nfsd_mkdir(sb->s_root, NULL, "clients"); 1371 if (IS_ERR(dentry)) 1372 return PTR_ERR(dentry); 1373 nn->nfsd_client_dir = dentry; 1374 return 0; 1375 } 1376 1377 static int nfsd_fs_get_tree(struct fs_context *fc) 1378 { 1379 return get_tree_keyed(fc, nfsd_fill_super, get_net(fc->net_ns)); 1380 } 1381 1382 static void nfsd_fs_free_fc(struct fs_context *fc) 1383 { 1384 if (fc->s_fs_info) 1385 put_net(fc->s_fs_info); 1386 } 1387 1388 static const struct fs_context_operations nfsd_fs_context_ops = { 1389 .free = nfsd_fs_free_fc, 1390 .get_tree = nfsd_fs_get_tree, 1391 }; 1392 1393 static int nfsd_init_fs_context(struct fs_context *fc) 1394 { 1395 put_user_ns(fc->user_ns); 1396 fc->user_ns = get_user_ns(fc->net_ns->user_ns); 1397 fc->ops = &nfsd_fs_context_ops; 1398 return 0; 1399 } 1400 1401 static void nfsd_umount(struct super_block *sb) 1402 { 1403 struct net *net = sb->s_fs_info; 1404 1405 nfsd_shutdown_threads(net); 1406 1407 kill_litter_super(sb); 1408 put_net(net); 1409 } 1410 1411 static struct file_system_type nfsd_fs_type = { 1412 .owner = THIS_MODULE, 1413 .name = "nfsd", 1414 .init_fs_context = nfsd_init_fs_context, 1415 .kill_sb = nfsd_umount, 1416 }; 1417 MODULE_ALIAS_FS("nfsd"); 1418 1419 #ifdef CONFIG_PROC_FS 1420 static int create_proc_exports_entry(void) 1421 { 1422 struct proc_dir_entry *entry; 1423 1424 entry = proc_mkdir("fs/nfs", NULL); 1425 if (!entry) 1426 return -ENOMEM; 1427 entry = proc_create("exports", 0, entry, &exports_proc_ops); 1428 if (!entry) { 1429 remove_proc_entry("fs/nfs", NULL); 1430 return -ENOMEM; 1431 } 1432 return 0; 1433 } 1434 #else /* CONFIG_PROC_FS */ 1435 static int create_proc_exports_entry(void) 1436 { 1437 return 0; 1438 } 1439 #endif 1440 1441 unsigned int nfsd_net_id; 1442 1443 static __net_init int nfsd_init_net(struct net *net) 1444 { 1445 int retval; 1446 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 1447 1448 retval = nfsd_export_init(net); 1449 if (retval) 1450 goto out_export_error; 1451 retval = nfsd_idmap_init(net); 1452 if (retval) 1453 goto out_idmap_error; 1454 nn->nfsd_versions = NULL; 1455 nn->nfsd4_minorversions = NULL; 1456 retval = nfsd4_init_leases_net(nn); 1457 if (retval) 1458 goto out_drc_error; 1459 retval = nfsd_reply_cache_init(nn); 1460 if (retval) 1461 goto out_cache_error; 1462 get_random_bytes(&nn->siphash_key, sizeof(nn->siphash_key)); 1463 seqlock_init(&nn->writeverf_lock); 1464 1465 return 0; 1466 1467 out_cache_error: 1468 nfsd4_leases_net_shutdown(nn); 1469 out_drc_error: 1470 nfsd_idmap_shutdown(net); 1471 out_idmap_error: 1472 nfsd_export_shutdown(net); 1473 out_export_error: 1474 return retval; 1475 } 1476 1477 static __net_exit void nfsd_exit_net(struct net *net) 1478 { 1479 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 1480 1481 nfsd_reply_cache_shutdown(nn); 1482 nfsd_idmap_shutdown(net); 1483 nfsd_export_shutdown(net); 1484 nfsd_netns_free_versions(net_generic(net, nfsd_net_id)); 1485 nfsd4_leases_net_shutdown(nn); 1486 } 1487 1488 static struct pernet_operations nfsd_net_ops = { 1489 .init = nfsd_init_net, 1490 .exit = nfsd_exit_net, 1491 .id = &nfsd_net_id, 1492 .size = sizeof(struct nfsd_net), 1493 }; 1494 1495 static int __init init_nfsd(void) 1496 { 1497 int retval; 1498 1499 retval = nfsd4_init_slabs(); 1500 if (retval) 1501 return retval; 1502 retval = nfsd4_init_pnfs(); 1503 if (retval) 1504 goto out_free_slabs; 1505 retval = nfsd_stat_init(); /* Statistics */ 1506 if (retval) 1507 goto out_free_pnfs; 1508 retval = nfsd_drc_slab_create(); 1509 if (retval) 1510 goto out_free_stat; 1511 nfsd_lockd_init(); /* lockd->nfsd callbacks */ 1512 retval = create_proc_exports_entry(); 1513 if (retval) 1514 goto out_free_lockd; 1515 retval = register_pernet_subsys(&nfsd_net_ops); 1516 if (retval < 0) 1517 goto out_free_exports; 1518 retval = register_cld_notifier(); 1519 if (retval) 1520 goto out_free_subsys; 1521 retval = nfsd4_create_laundry_wq(); 1522 if (retval) 1523 goto out_free_cld; 1524 retval = register_filesystem(&nfsd_fs_type); 1525 if (retval) 1526 goto out_free_all; 1527 return 0; 1528 out_free_all: 1529 nfsd4_destroy_laundry_wq(); 1530 out_free_cld: 1531 unregister_cld_notifier(); 1532 out_free_subsys: 1533 unregister_pernet_subsys(&nfsd_net_ops); 1534 out_free_exports: 1535 remove_proc_entry("fs/nfs/exports", NULL); 1536 remove_proc_entry("fs/nfs", NULL); 1537 out_free_lockd: 1538 nfsd_lockd_shutdown(); 1539 nfsd_drc_slab_free(); 1540 out_free_stat: 1541 nfsd_stat_shutdown(); 1542 out_free_pnfs: 1543 nfsd4_exit_pnfs(); 1544 out_free_slabs: 1545 nfsd4_free_slabs(); 1546 return retval; 1547 } 1548 1549 static void __exit exit_nfsd(void) 1550 { 1551 unregister_filesystem(&nfsd_fs_type); 1552 nfsd4_destroy_laundry_wq(); 1553 unregister_cld_notifier(); 1554 unregister_pernet_subsys(&nfsd_net_ops); 1555 nfsd_drc_slab_free(); 1556 remove_proc_entry("fs/nfs/exports", NULL); 1557 remove_proc_entry("fs/nfs", NULL); 1558 nfsd_stat_shutdown(); 1559 nfsd_lockd_shutdown(); 1560 nfsd4_free_slabs(); 1561 nfsd4_exit_pnfs(); 1562 } 1563 1564 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); 1565 MODULE_LICENSE("GPL"); 1566 module_init(init_nfsd) 1567 module_exit(exit_nfsd) 1568