1 2 #include <linux/ceph/ceph_debug.h> 3 #include <linux/backing-dev.h> 4 #include <linux/ctype.h> 5 #include <linux/fs.h> 6 #include <linux/inet.h> 7 #include <linux/in6.h> 8 #include <linux/key.h> 9 #include <keys/ceph-type.h> 10 #include <linux/module.h> 11 #include <linux/mount.h> 12 #include <linux/nsproxy.h> 13 #include <linux/parser.h> 14 #include <linux/sched.h> 15 #include <linux/seq_file.h> 16 #include <linux/slab.h> 17 #include <linux/statfs.h> 18 #include <linux/string.h> 19 #include <linux/vmalloc.h> 20 21 22 #include <linux/ceph/ceph_features.h> 23 #include <linux/ceph/libceph.h> 24 #include <linux/ceph/debugfs.h> 25 #include <linux/ceph/decode.h> 26 #include <linux/ceph/mon_client.h> 27 #include <linux/ceph/auth.h> 28 #include "crypto.h" 29 30 31 /* 32 * Module compatibility interface. For now it doesn't do anything, 33 * but its existence signals a certain level of functionality. 34 * 35 * The data buffer is used to pass information both to and from 36 * libceph. The return value indicates whether libceph determines 37 * it is compatible with the caller (from another kernel module), 38 * given the provided data. 39 * 40 * The data pointer can be null. 41 */ 42 bool libceph_compatible(void *data) 43 { 44 return true; 45 } 46 EXPORT_SYMBOL(libceph_compatible); 47 48 static int param_get_supported_features(char *buffer, 49 const struct kernel_param *kp) 50 { 51 return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT); 52 } 53 static const struct kernel_param_ops param_ops_supported_features = { 54 .get = param_get_supported_features, 55 }; 56 module_param_cb(supported_features, ¶m_ops_supported_features, NULL, 57 0444); 58 59 const char *ceph_msg_type_name(int type) 60 { 61 switch (type) { 62 case CEPH_MSG_SHUTDOWN: return "shutdown"; 63 case CEPH_MSG_PING: return "ping"; 64 case CEPH_MSG_AUTH: return "auth"; 65 case CEPH_MSG_AUTH_REPLY: return "auth_reply"; 66 case CEPH_MSG_MON_MAP: return "mon_map"; 67 case CEPH_MSG_MON_GET_MAP: return "mon_get_map"; 68 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe"; 69 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack"; 70 case CEPH_MSG_STATFS: return "statfs"; 71 case CEPH_MSG_STATFS_REPLY: return "statfs_reply"; 72 case CEPH_MSG_MON_GET_VERSION: return "mon_get_version"; 73 case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply"; 74 case CEPH_MSG_MDS_MAP: return "mds_map"; 75 case CEPH_MSG_FS_MAP_USER: return "fs_map_user"; 76 case CEPH_MSG_CLIENT_SESSION: return "client_session"; 77 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect"; 78 case CEPH_MSG_CLIENT_REQUEST: return "client_request"; 79 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward"; 80 case CEPH_MSG_CLIENT_REPLY: return "client_reply"; 81 case CEPH_MSG_CLIENT_CAPS: return "client_caps"; 82 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release"; 83 case CEPH_MSG_CLIENT_QUOTA: return "client_quota"; 84 case CEPH_MSG_CLIENT_SNAP: return "client_snap"; 85 case CEPH_MSG_CLIENT_LEASE: return "client_lease"; 86 case CEPH_MSG_POOLOP_REPLY: return "poolop_reply"; 87 case CEPH_MSG_POOLOP: return "poolop"; 88 case CEPH_MSG_MON_COMMAND: return "mon_command"; 89 case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack"; 90 case CEPH_MSG_OSD_MAP: return "osd_map"; 91 case CEPH_MSG_OSD_OP: return "osd_op"; 92 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply"; 93 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify"; 94 case CEPH_MSG_OSD_BACKOFF: return "osd_backoff"; 95 default: return "unknown"; 96 } 97 } 98 EXPORT_SYMBOL(ceph_msg_type_name); 99 100 /* 101 * Initially learn our fsid, or verify an fsid matches. 102 */ 103 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid) 104 { 105 if (client->have_fsid) { 106 if (ceph_fsid_compare(&client->fsid, fsid)) { 107 pr_err("bad fsid, had %pU got %pU", 108 &client->fsid, fsid); 109 return -1; 110 } 111 } else { 112 memcpy(&client->fsid, fsid, sizeof(*fsid)); 113 } 114 return 0; 115 } 116 EXPORT_SYMBOL(ceph_check_fsid); 117 118 static int strcmp_null(const char *s1, const char *s2) 119 { 120 if (!s1 && !s2) 121 return 0; 122 if (s1 && !s2) 123 return -1; 124 if (!s1 && s2) 125 return 1; 126 return strcmp(s1, s2); 127 } 128 129 int ceph_compare_options(struct ceph_options *new_opt, 130 struct ceph_client *client) 131 { 132 struct ceph_options *opt1 = new_opt; 133 struct ceph_options *opt2 = client->options; 134 int ofs = offsetof(struct ceph_options, mon_addr); 135 int i; 136 int ret; 137 138 /* 139 * Don't bother comparing options if network namespaces don't 140 * match. 141 */ 142 if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net))) 143 return -1; 144 145 ret = memcmp(opt1, opt2, ofs); 146 if (ret) 147 return ret; 148 149 ret = strcmp_null(opt1->name, opt2->name); 150 if (ret) 151 return ret; 152 153 if (opt1->key && !opt2->key) 154 return -1; 155 if (!opt1->key && opt2->key) 156 return 1; 157 if (opt1->key && opt2->key) { 158 if (opt1->key->type != opt2->key->type) 159 return -1; 160 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec) 161 return -1; 162 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec) 163 return -1; 164 if (opt1->key->len != opt2->key->len) 165 return -1; 166 if (opt1->key->key && !opt2->key->key) 167 return -1; 168 if (!opt1->key->key && opt2->key->key) 169 return 1; 170 if (opt1->key->key && opt2->key->key) { 171 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len); 172 if (ret) 173 return ret; 174 } 175 } 176 177 /* any matching mon ip implies a match */ 178 for (i = 0; i < opt1->num_mon; i++) { 179 if (ceph_monmap_contains(client->monc.monmap, 180 &opt1->mon_addr[i])) 181 return 0; 182 } 183 return -1; 184 } 185 EXPORT_SYMBOL(ceph_compare_options); 186 187 void *ceph_kvmalloc(size_t size, gfp_t flags) 188 { 189 if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) { 190 void *ptr = kmalloc(size, flags | __GFP_NOWARN); 191 if (ptr) 192 return ptr; 193 } 194 195 return __vmalloc(size, flags, PAGE_KERNEL); 196 } 197 198 199 static int parse_fsid(const char *str, struct ceph_fsid *fsid) 200 { 201 int i = 0; 202 char tmp[3]; 203 int err = -EINVAL; 204 int d; 205 206 dout("parse_fsid '%s'\n", str); 207 tmp[2] = 0; 208 while (*str && i < 16) { 209 if (ispunct(*str)) { 210 str++; 211 continue; 212 } 213 if (!isxdigit(str[0]) || !isxdigit(str[1])) 214 break; 215 tmp[0] = str[0]; 216 tmp[1] = str[1]; 217 if (sscanf(tmp, "%x", &d) < 1) 218 break; 219 fsid->fsid[i] = d & 0xff; 220 i++; 221 str += 2; 222 } 223 224 if (i == 16) 225 err = 0; 226 dout("parse_fsid ret %d got fsid %pU\n", err, fsid); 227 return err; 228 } 229 230 /* 231 * ceph options 232 */ 233 enum { 234 Opt_osdtimeout, 235 Opt_osdkeepalivetimeout, 236 Opt_mount_timeout, 237 Opt_osd_idle_ttl, 238 Opt_osd_request_timeout, 239 Opt_last_int, 240 /* int args above */ 241 Opt_fsid, 242 Opt_name, 243 Opt_secret, 244 Opt_key, 245 Opt_ip, 246 Opt_last_string, 247 /* string args above */ 248 Opt_share, 249 Opt_noshare, 250 Opt_crc, 251 Opt_nocrc, 252 Opt_cephx_require_signatures, 253 Opt_nocephx_require_signatures, 254 Opt_cephx_sign_messages, 255 Opt_nocephx_sign_messages, 256 Opt_tcp_nodelay, 257 Opt_notcp_nodelay, 258 }; 259 260 static match_table_t opt_tokens = { 261 {Opt_osdtimeout, "osdtimeout=%d"}, 262 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"}, 263 {Opt_mount_timeout, "mount_timeout=%d"}, 264 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"}, 265 {Opt_osd_request_timeout, "osd_request_timeout=%d"}, 266 /* int args above */ 267 {Opt_fsid, "fsid=%s"}, 268 {Opt_name, "name=%s"}, 269 {Opt_secret, "secret=%s"}, 270 {Opt_key, "key=%s"}, 271 {Opt_ip, "ip=%s"}, 272 /* string args above */ 273 {Opt_share, "share"}, 274 {Opt_noshare, "noshare"}, 275 {Opt_crc, "crc"}, 276 {Opt_nocrc, "nocrc"}, 277 {Opt_cephx_require_signatures, "cephx_require_signatures"}, 278 {Opt_nocephx_require_signatures, "nocephx_require_signatures"}, 279 {Opt_cephx_sign_messages, "cephx_sign_messages"}, 280 {Opt_nocephx_sign_messages, "nocephx_sign_messages"}, 281 {Opt_tcp_nodelay, "tcp_nodelay"}, 282 {Opt_notcp_nodelay, "notcp_nodelay"}, 283 {-1, NULL} 284 }; 285 286 void ceph_destroy_options(struct ceph_options *opt) 287 { 288 dout("destroy_options %p\n", opt); 289 kfree(opt->name); 290 if (opt->key) { 291 ceph_crypto_key_destroy(opt->key); 292 kfree(opt->key); 293 } 294 kfree(opt->mon_addr); 295 kfree(opt); 296 } 297 EXPORT_SYMBOL(ceph_destroy_options); 298 299 /* get secret from key store */ 300 static int get_secret(struct ceph_crypto_key *dst, const char *name) { 301 struct key *ukey; 302 int key_err; 303 int err = 0; 304 struct ceph_crypto_key *ckey; 305 306 ukey = request_key(&key_type_ceph, name, NULL); 307 if (IS_ERR(ukey)) { 308 /* request_key errors don't map nicely to mount(2) 309 errors; don't even try, but still printk */ 310 key_err = PTR_ERR(ukey); 311 switch (key_err) { 312 case -ENOKEY: 313 pr_warn("ceph: Mount failed due to key not found: %s\n", 314 name); 315 break; 316 case -EKEYEXPIRED: 317 pr_warn("ceph: Mount failed due to expired key: %s\n", 318 name); 319 break; 320 case -EKEYREVOKED: 321 pr_warn("ceph: Mount failed due to revoked key: %s\n", 322 name); 323 break; 324 default: 325 pr_warn("ceph: Mount failed due to unknown key error %d: %s\n", 326 key_err, name); 327 } 328 err = -EPERM; 329 goto out; 330 } 331 332 ckey = ukey->payload.data[0]; 333 err = ceph_crypto_key_clone(dst, ckey); 334 if (err) 335 goto out_key; 336 /* pass through, err is 0 */ 337 338 out_key: 339 key_put(ukey); 340 out: 341 return err; 342 } 343 344 struct ceph_options * 345 ceph_parse_options(char *options, const char *dev_name, 346 const char *dev_name_end, 347 int (*parse_extra_token)(char *c, void *private), 348 void *private) 349 { 350 struct ceph_options *opt; 351 const char *c; 352 int err = -ENOMEM; 353 substring_t argstr[MAX_OPT_ARGS]; 354 355 opt = kzalloc(sizeof(*opt), GFP_KERNEL); 356 if (!opt) 357 return ERR_PTR(-ENOMEM); 358 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr), 359 GFP_KERNEL); 360 if (!opt->mon_addr) 361 goto out; 362 363 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options, 364 dev_name); 365 366 /* start with defaults */ 367 opt->flags = CEPH_OPT_DEFAULT; 368 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT; 369 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; 370 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; 371 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT; 372 373 /* get mon ip(s) */ 374 /* ip1[:port1][,ip2[:port2]...] */ 375 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr, 376 CEPH_MAX_MON, &opt->num_mon); 377 if (err < 0) 378 goto out; 379 380 /* parse mount options */ 381 while ((c = strsep(&options, ",")) != NULL) { 382 int token, intval; 383 if (!*c) 384 continue; 385 err = -EINVAL; 386 token = match_token((char *)c, opt_tokens, argstr); 387 if (token < 0 && parse_extra_token) { 388 /* extra? */ 389 err = parse_extra_token((char *)c, private); 390 if (err < 0) { 391 pr_err("bad option at '%s'\n", c); 392 goto out; 393 } 394 continue; 395 } 396 if (token < Opt_last_int) { 397 err = match_int(&argstr[0], &intval); 398 if (err < 0) { 399 pr_err("bad option arg (not int) at '%s'\n", c); 400 goto out; 401 } 402 dout("got int token %d val %d\n", token, intval); 403 } else if (token > Opt_last_int && token < Opt_last_string) { 404 dout("got string token %d val %s\n", token, 405 argstr[0].from); 406 } else { 407 dout("got token %d\n", token); 408 } 409 switch (token) { 410 case Opt_ip: 411 err = ceph_parse_ips(argstr[0].from, 412 argstr[0].to, 413 &opt->my_addr, 414 1, NULL); 415 if (err < 0) 416 goto out; 417 opt->flags |= CEPH_OPT_MYIP; 418 break; 419 420 case Opt_fsid: 421 err = parse_fsid(argstr[0].from, &opt->fsid); 422 if (err == 0) 423 opt->flags |= CEPH_OPT_FSID; 424 break; 425 case Opt_name: 426 kfree(opt->name); 427 opt->name = kstrndup(argstr[0].from, 428 argstr[0].to-argstr[0].from, 429 GFP_KERNEL); 430 if (!opt->name) { 431 err = -ENOMEM; 432 goto out; 433 } 434 break; 435 case Opt_secret: 436 ceph_crypto_key_destroy(opt->key); 437 kfree(opt->key); 438 439 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 440 if (!opt->key) { 441 err = -ENOMEM; 442 goto out; 443 } 444 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from); 445 if (err < 0) 446 goto out; 447 break; 448 case Opt_key: 449 ceph_crypto_key_destroy(opt->key); 450 kfree(opt->key); 451 452 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 453 if (!opt->key) { 454 err = -ENOMEM; 455 goto out; 456 } 457 err = get_secret(opt->key, argstr[0].from); 458 if (err < 0) 459 goto out; 460 break; 461 462 /* misc */ 463 case Opt_osdtimeout: 464 pr_warn("ignoring deprecated osdtimeout option\n"); 465 break; 466 case Opt_osdkeepalivetimeout: 467 /* 0 isn't well defined right now, reject it */ 468 if (intval < 1 || intval > INT_MAX / 1000) { 469 pr_err("osdkeepalive out of range\n"); 470 err = -EINVAL; 471 goto out; 472 } 473 opt->osd_keepalive_timeout = 474 msecs_to_jiffies(intval * 1000); 475 break; 476 case Opt_osd_idle_ttl: 477 /* 0 isn't well defined right now, reject it */ 478 if (intval < 1 || intval > INT_MAX / 1000) { 479 pr_err("osd_idle_ttl out of range\n"); 480 err = -EINVAL; 481 goto out; 482 } 483 opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000); 484 break; 485 case Opt_mount_timeout: 486 /* 0 is "wait forever" (i.e. infinite timeout) */ 487 if (intval < 0 || intval > INT_MAX / 1000) { 488 pr_err("mount_timeout out of range\n"); 489 err = -EINVAL; 490 goto out; 491 } 492 opt->mount_timeout = msecs_to_jiffies(intval * 1000); 493 break; 494 case Opt_osd_request_timeout: 495 /* 0 is "wait forever" (i.e. infinite timeout) */ 496 if (intval < 0 || intval > INT_MAX / 1000) { 497 pr_err("osd_request_timeout out of range\n"); 498 err = -EINVAL; 499 goto out; 500 } 501 opt->osd_request_timeout = msecs_to_jiffies(intval * 1000); 502 break; 503 504 case Opt_share: 505 opt->flags &= ~CEPH_OPT_NOSHARE; 506 break; 507 case Opt_noshare: 508 opt->flags |= CEPH_OPT_NOSHARE; 509 break; 510 511 case Opt_crc: 512 opt->flags &= ~CEPH_OPT_NOCRC; 513 break; 514 case Opt_nocrc: 515 opt->flags |= CEPH_OPT_NOCRC; 516 break; 517 518 case Opt_cephx_require_signatures: 519 opt->flags &= ~CEPH_OPT_NOMSGAUTH; 520 break; 521 case Opt_nocephx_require_signatures: 522 opt->flags |= CEPH_OPT_NOMSGAUTH; 523 break; 524 case Opt_cephx_sign_messages: 525 opt->flags &= ~CEPH_OPT_NOMSGSIGN; 526 break; 527 case Opt_nocephx_sign_messages: 528 opt->flags |= CEPH_OPT_NOMSGSIGN; 529 break; 530 531 case Opt_tcp_nodelay: 532 opt->flags |= CEPH_OPT_TCP_NODELAY; 533 break; 534 case Opt_notcp_nodelay: 535 opt->flags &= ~CEPH_OPT_TCP_NODELAY; 536 break; 537 538 default: 539 BUG_ON(token); 540 } 541 } 542 543 /* success */ 544 return opt; 545 546 out: 547 ceph_destroy_options(opt); 548 return ERR_PTR(err); 549 } 550 EXPORT_SYMBOL(ceph_parse_options); 551 552 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client) 553 { 554 struct ceph_options *opt = client->options; 555 size_t pos = m->count; 556 557 if (opt->name) { 558 seq_puts(m, "name="); 559 seq_escape(m, opt->name, ", \t\n\\"); 560 seq_putc(m, ','); 561 } 562 if (opt->key) 563 seq_puts(m, "secret=<hidden>,"); 564 565 if (opt->flags & CEPH_OPT_FSID) 566 seq_printf(m, "fsid=%pU,", &opt->fsid); 567 if (opt->flags & CEPH_OPT_NOSHARE) 568 seq_puts(m, "noshare,"); 569 if (opt->flags & CEPH_OPT_NOCRC) 570 seq_puts(m, "nocrc,"); 571 if (opt->flags & CEPH_OPT_NOMSGAUTH) 572 seq_puts(m, "nocephx_require_signatures,"); 573 if (opt->flags & CEPH_OPT_NOMSGSIGN) 574 seq_puts(m, "nocephx_sign_messages,"); 575 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0) 576 seq_puts(m, "notcp_nodelay,"); 577 578 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) 579 seq_printf(m, "mount_timeout=%d,", 580 jiffies_to_msecs(opt->mount_timeout) / 1000); 581 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) 582 seq_printf(m, "osd_idle_ttl=%d,", 583 jiffies_to_msecs(opt->osd_idle_ttl) / 1000); 584 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) 585 seq_printf(m, "osdkeepalivetimeout=%d,", 586 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000); 587 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT) 588 seq_printf(m, "osd_request_timeout=%d,", 589 jiffies_to_msecs(opt->osd_request_timeout) / 1000); 590 591 /* drop redundant comma */ 592 if (m->count != pos) 593 m->count--; 594 595 return 0; 596 } 597 EXPORT_SYMBOL(ceph_print_client_options); 598 599 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client) 600 { 601 return &client->msgr.inst.addr; 602 } 603 EXPORT_SYMBOL(ceph_client_addr); 604 605 u64 ceph_client_gid(struct ceph_client *client) 606 { 607 return client->monc.auth->global_id; 608 } 609 EXPORT_SYMBOL(ceph_client_gid); 610 611 /* 612 * create a fresh client instance 613 */ 614 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private) 615 { 616 struct ceph_client *client; 617 struct ceph_entity_addr *myaddr = NULL; 618 int err; 619 620 err = wait_for_random_bytes(); 621 if (err < 0) 622 return ERR_PTR(err); 623 624 client = kzalloc(sizeof(*client), GFP_KERNEL); 625 if (client == NULL) 626 return ERR_PTR(-ENOMEM); 627 628 client->private = private; 629 client->options = opt; 630 631 mutex_init(&client->mount_mutex); 632 init_waitqueue_head(&client->auth_wq); 633 client->auth_err = 0; 634 635 client->extra_mon_dispatch = NULL; 636 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT; 637 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT; 638 639 if (!ceph_test_opt(client, NOMSGAUTH)) 640 client->required_features |= CEPH_FEATURE_MSG_AUTH; 641 642 /* msgr */ 643 if (ceph_test_opt(client, MYIP)) 644 myaddr = &client->options->my_addr; 645 646 ceph_messenger_init(&client->msgr, myaddr); 647 648 /* subsystems */ 649 err = ceph_monc_init(&client->monc, client); 650 if (err < 0) 651 goto fail; 652 err = ceph_osdc_init(&client->osdc, client); 653 if (err < 0) 654 goto fail_monc; 655 656 return client; 657 658 fail_monc: 659 ceph_monc_stop(&client->monc); 660 fail: 661 ceph_messenger_fini(&client->msgr); 662 kfree(client); 663 return ERR_PTR(err); 664 } 665 EXPORT_SYMBOL(ceph_create_client); 666 667 void ceph_destroy_client(struct ceph_client *client) 668 { 669 dout("destroy_client %p\n", client); 670 671 atomic_set(&client->msgr.stopping, 1); 672 673 /* unmount */ 674 ceph_osdc_stop(&client->osdc); 675 ceph_monc_stop(&client->monc); 676 ceph_messenger_fini(&client->msgr); 677 678 ceph_debugfs_client_cleanup(client); 679 680 ceph_destroy_options(client->options); 681 682 kfree(client); 683 dout("destroy_client %p done\n", client); 684 } 685 EXPORT_SYMBOL(ceph_destroy_client); 686 687 /* 688 * true if we have the mon map (and have thus joined the cluster) 689 */ 690 static bool have_mon_and_osd_map(struct ceph_client *client) 691 { 692 return client->monc.monmap && client->monc.monmap->epoch && 693 client->osdc.osdmap && client->osdc.osdmap->epoch; 694 } 695 696 /* 697 * mount: join the ceph cluster, and open root directory. 698 */ 699 int __ceph_open_session(struct ceph_client *client, unsigned long started) 700 { 701 unsigned long timeout = client->options->mount_timeout; 702 long err; 703 704 /* open session, and wait for mon and osd maps */ 705 err = ceph_monc_open_session(&client->monc); 706 if (err < 0) 707 return err; 708 709 while (!have_mon_and_osd_map(client)) { 710 if (timeout && time_after_eq(jiffies, started + timeout)) 711 return -ETIMEDOUT; 712 713 /* wait */ 714 dout("mount waiting for mon_map\n"); 715 err = wait_event_interruptible_timeout(client->auth_wq, 716 have_mon_and_osd_map(client) || (client->auth_err < 0), 717 ceph_timeout_jiffies(timeout)); 718 if (err < 0) 719 return err; 720 if (client->auth_err < 0) 721 return client->auth_err; 722 } 723 724 pr_info("client%llu fsid %pU\n", ceph_client_gid(client), 725 &client->fsid); 726 ceph_debugfs_client_init(client); 727 728 return 0; 729 } 730 EXPORT_SYMBOL(__ceph_open_session); 731 732 733 int ceph_open_session(struct ceph_client *client) 734 { 735 int ret; 736 unsigned long started = jiffies; /* note the start time */ 737 738 dout("open_session start\n"); 739 mutex_lock(&client->mount_mutex); 740 741 ret = __ceph_open_session(client, started); 742 743 mutex_unlock(&client->mount_mutex); 744 return ret; 745 } 746 EXPORT_SYMBOL(ceph_open_session); 747 748 749 static int __init init_ceph_lib(void) 750 { 751 int ret = 0; 752 753 ret = ceph_debugfs_init(); 754 if (ret < 0) 755 goto out; 756 757 ret = ceph_crypto_init(); 758 if (ret < 0) 759 goto out_debugfs; 760 761 ret = ceph_msgr_init(); 762 if (ret < 0) 763 goto out_crypto; 764 765 ret = ceph_osdc_setup(); 766 if (ret < 0) 767 goto out_msgr; 768 769 pr_info("loaded (mon/osd proto %d/%d)\n", 770 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL); 771 772 return 0; 773 774 out_msgr: 775 ceph_msgr_exit(); 776 out_crypto: 777 ceph_crypto_shutdown(); 778 out_debugfs: 779 ceph_debugfs_cleanup(); 780 out: 781 return ret; 782 } 783 784 static void __exit exit_ceph_lib(void) 785 { 786 dout("exit_ceph_lib\n"); 787 WARN_ON(!ceph_strings_empty()); 788 789 ceph_osdc_cleanup(); 790 ceph_msgr_exit(); 791 ceph_crypto_shutdown(); 792 ceph_debugfs_cleanup(); 793 } 794 795 module_init(init_ceph_lib); 796 module_exit(exit_ceph_lib); 797 798 MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); 799 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); 800 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); 801 MODULE_DESCRIPTION("Ceph core library"); 802 MODULE_LICENSE("GPL"); 803