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 Opt_abort_on_full, 259 }; 260 261 static match_table_t opt_tokens = { 262 {Opt_osdtimeout, "osdtimeout=%d"}, 263 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"}, 264 {Opt_mount_timeout, "mount_timeout=%d"}, 265 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"}, 266 {Opt_osd_request_timeout, "osd_request_timeout=%d"}, 267 /* int args above */ 268 {Opt_fsid, "fsid=%s"}, 269 {Opt_name, "name=%s"}, 270 {Opt_secret, "secret=%s"}, 271 {Opt_key, "key=%s"}, 272 {Opt_ip, "ip=%s"}, 273 /* string args above */ 274 {Opt_share, "share"}, 275 {Opt_noshare, "noshare"}, 276 {Opt_crc, "crc"}, 277 {Opt_nocrc, "nocrc"}, 278 {Opt_cephx_require_signatures, "cephx_require_signatures"}, 279 {Opt_nocephx_require_signatures, "nocephx_require_signatures"}, 280 {Opt_cephx_sign_messages, "cephx_sign_messages"}, 281 {Opt_nocephx_sign_messages, "nocephx_sign_messages"}, 282 {Opt_tcp_nodelay, "tcp_nodelay"}, 283 {Opt_notcp_nodelay, "notcp_nodelay"}, 284 {Opt_abort_on_full, "abort_on_full"}, 285 {-1, NULL} 286 }; 287 288 void ceph_destroy_options(struct ceph_options *opt) 289 { 290 dout("destroy_options %p\n", opt); 291 kfree(opt->name); 292 if (opt->key) { 293 ceph_crypto_key_destroy(opt->key); 294 kfree(opt->key); 295 } 296 kfree(opt->mon_addr); 297 kfree(opt); 298 } 299 EXPORT_SYMBOL(ceph_destroy_options); 300 301 /* get secret from key store */ 302 static int get_secret(struct ceph_crypto_key *dst, const char *name) { 303 struct key *ukey; 304 int key_err; 305 int err = 0; 306 struct ceph_crypto_key *ckey; 307 308 ukey = request_key(&key_type_ceph, name, NULL); 309 if (IS_ERR(ukey)) { 310 /* request_key errors don't map nicely to mount(2) 311 errors; don't even try, but still printk */ 312 key_err = PTR_ERR(ukey); 313 switch (key_err) { 314 case -ENOKEY: 315 pr_warn("ceph: Mount failed due to key not found: %s\n", 316 name); 317 break; 318 case -EKEYEXPIRED: 319 pr_warn("ceph: Mount failed due to expired key: %s\n", 320 name); 321 break; 322 case -EKEYREVOKED: 323 pr_warn("ceph: Mount failed due to revoked key: %s\n", 324 name); 325 break; 326 default: 327 pr_warn("ceph: Mount failed due to unknown key error %d: %s\n", 328 key_err, name); 329 } 330 err = -EPERM; 331 goto out; 332 } 333 334 ckey = ukey->payload.data[0]; 335 err = ceph_crypto_key_clone(dst, ckey); 336 if (err) 337 goto out_key; 338 /* pass through, err is 0 */ 339 340 out_key: 341 key_put(ukey); 342 out: 343 return err; 344 } 345 346 struct ceph_options * 347 ceph_parse_options(char *options, const char *dev_name, 348 const char *dev_name_end, 349 int (*parse_extra_token)(char *c, void *private), 350 void *private) 351 { 352 struct ceph_options *opt; 353 const char *c; 354 int err = -ENOMEM; 355 substring_t argstr[MAX_OPT_ARGS]; 356 357 opt = kzalloc(sizeof(*opt), GFP_KERNEL); 358 if (!opt) 359 return ERR_PTR(-ENOMEM); 360 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr), 361 GFP_KERNEL); 362 if (!opt->mon_addr) 363 goto out; 364 365 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options, 366 dev_name); 367 368 /* start with defaults */ 369 opt->flags = CEPH_OPT_DEFAULT; 370 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT; 371 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; 372 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; 373 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT; 374 375 /* get mon ip(s) */ 376 /* ip1[:port1][,ip2[:port2]...] */ 377 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr, 378 CEPH_MAX_MON, &opt->num_mon); 379 if (err < 0) 380 goto out; 381 382 /* parse mount options */ 383 while ((c = strsep(&options, ",")) != NULL) { 384 int token, intval; 385 if (!*c) 386 continue; 387 err = -EINVAL; 388 token = match_token((char *)c, opt_tokens, argstr); 389 if (token < 0 && parse_extra_token) { 390 /* extra? */ 391 err = parse_extra_token((char *)c, private); 392 if (err < 0) { 393 pr_err("bad option at '%s'\n", c); 394 goto out; 395 } 396 continue; 397 } 398 if (token < Opt_last_int) { 399 err = match_int(&argstr[0], &intval); 400 if (err < 0) { 401 pr_err("bad option arg (not int) at '%s'\n", c); 402 goto out; 403 } 404 dout("got int token %d val %d\n", token, intval); 405 } else if (token > Opt_last_int && token < Opt_last_string) { 406 dout("got string token %d val %s\n", token, 407 argstr[0].from); 408 } else { 409 dout("got token %d\n", token); 410 } 411 switch (token) { 412 case Opt_ip: 413 err = ceph_parse_ips(argstr[0].from, 414 argstr[0].to, 415 &opt->my_addr, 416 1, NULL); 417 if (err < 0) 418 goto out; 419 opt->flags |= CEPH_OPT_MYIP; 420 break; 421 422 case Opt_fsid: 423 err = parse_fsid(argstr[0].from, &opt->fsid); 424 if (err == 0) 425 opt->flags |= CEPH_OPT_FSID; 426 break; 427 case Opt_name: 428 kfree(opt->name); 429 opt->name = kstrndup(argstr[0].from, 430 argstr[0].to-argstr[0].from, 431 GFP_KERNEL); 432 if (!opt->name) { 433 err = -ENOMEM; 434 goto out; 435 } 436 break; 437 case Opt_secret: 438 ceph_crypto_key_destroy(opt->key); 439 kfree(opt->key); 440 441 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 442 if (!opt->key) { 443 err = -ENOMEM; 444 goto out; 445 } 446 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from); 447 if (err < 0) 448 goto out; 449 break; 450 case Opt_key: 451 ceph_crypto_key_destroy(opt->key); 452 kfree(opt->key); 453 454 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 455 if (!opt->key) { 456 err = -ENOMEM; 457 goto out; 458 } 459 err = get_secret(opt->key, argstr[0].from); 460 if (err < 0) 461 goto out; 462 break; 463 464 /* misc */ 465 case Opt_osdtimeout: 466 pr_warn("ignoring deprecated osdtimeout option\n"); 467 break; 468 case Opt_osdkeepalivetimeout: 469 /* 0 isn't well defined right now, reject it */ 470 if (intval < 1 || intval > INT_MAX / 1000) { 471 pr_err("osdkeepalive out of range\n"); 472 err = -EINVAL; 473 goto out; 474 } 475 opt->osd_keepalive_timeout = 476 msecs_to_jiffies(intval * 1000); 477 break; 478 case Opt_osd_idle_ttl: 479 /* 0 isn't well defined right now, reject it */ 480 if (intval < 1 || intval > INT_MAX / 1000) { 481 pr_err("osd_idle_ttl out of range\n"); 482 err = -EINVAL; 483 goto out; 484 } 485 opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000); 486 break; 487 case Opt_mount_timeout: 488 /* 0 is "wait forever" (i.e. infinite timeout) */ 489 if (intval < 0 || intval > INT_MAX / 1000) { 490 pr_err("mount_timeout out of range\n"); 491 err = -EINVAL; 492 goto out; 493 } 494 opt->mount_timeout = msecs_to_jiffies(intval * 1000); 495 break; 496 case Opt_osd_request_timeout: 497 /* 0 is "wait forever" (i.e. infinite timeout) */ 498 if (intval < 0 || intval > INT_MAX / 1000) { 499 pr_err("osd_request_timeout out of range\n"); 500 err = -EINVAL; 501 goto out; 502 } 503 opt->osd_request_timeout = msecs_to_jiffies(intval * 1000); 504 break; 505 506 case Opt_share: 507 opt->flags &= ~CEPH_OPT_NOSHARE; 508 break; 509 case Opt_noshare: 510 opt->flags |= CEPH_OPT_NOSHARE; 511 break; 512 513 case Opt_crc: 514 opt->flags &= ~CEPH_OPT_NOCRC; 515 break; 516 case Opt_nocrc: 517 opt->flags |= CEPH_OPT_NOCRC; 518 break; 519 520 case Opt_cephx_require_signatures: 521 opt->flags &= ~CEPH_OPT_NOMSGAUTH; 522 break; 523 case Opt_nocephx_require_signatures: 524 opt->flags |= CEPH_OPT_NOMSGAUTH; 525 break; 526 case Opt_cephx_sign_messages: 527 opt->flags &= ~CEPH_OPT_NOMSGSIGN; 528 break; 529 case Opt_nocephx_sign_messages: 530 opt->flags |= CEPH_OPT_NOMSGSIGN; 531 break; 532 533 case Opt_tcp_nodelay: 534 opt->flags |= CEPH_OPT_TCP_NODELAY; 535 break; 536 case Opt_notcp_nodelay: 537 opt->flags &= ~CEPH_OPT_TCP_NODELAY; 538 break; 539 540 case Opt_abort_on_full: 541 opt->flags |= CEPH_OPT_ABORT_ON_FULL; 542 break; 543 544 default: 545 BUG_ON(token); 546 } 547 } 548 549 /* success */ 550 return opt; 551 552 out: 553 ceph_destroy_options(opt); 554 return ERR_PTR(err); 555 } 556 EXPORT_SYMBOL(ceph_parse_options); 557 558 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client, 559 bool show_all) 560 { 561 struct ceph_options *opt = client->options; 562 size_t pos = m->count; 563 564 if (opt->name) { 565 seq_puts(m, "name="); 566 seq_escape(m, opt->name, ", \t\n\\"); 567 seq_putc(m, ','); 568 } 569 if (opt->key) 570 seq_puts(m, "secret=<hidden>,"); 571 572 if (opt->flags & CEPH_OPT_FSID) 573 seq_printf(m, "fsid=%pU,", &opt->fsid); 574 if (opt->flags & CEPH_OPT_NOSHARE) 575 seq_puts(m, "noshare,"); 576 if (opt->flags & CEPH_OPT_NOCRC) 577 seq_puts(m, "nocrc,"); 578 if (opt->flags & CEPH_OPT_NOMSGAUTH) 579 seq_puts(m, "nocephx_require_signatures,"); 580 if (opt->flags & CEPH_OPT_NOMSGSIGN) 581 seq_puts(m, "nocephx_sign_messages,"); 582 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0) 583 seq_puts(m, "notcp_nodelay,"); 584 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL)) 585 seq_puts(m, "abort_on_full,"); 586 587 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) 588 seq_printf(m, "mount_timeout=%d,", 589 jiffies_to_msecs(opt->mount_timeout) / 1000); 590 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) 591 seq_printf(m, "osd_idle_ttl=%d,", 592 jiffies_to_msecs(opt->osd_idle_ttl) / 1000); 593 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) 594 seq_printf(m, "osdkeepalivetimeout=%d,", 595 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000); 596 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT) 597 seq_printf(m, "osd_request_timeout=%d,", 598 jiffies_to_msecs(opt->osd_request_timeout) / 1000); 599 600 /* drop redundant comma */ 601 if (m->count != pos) 602 m->count--; 603 604 return 0; 605 } 606 EXPORT_SYMBOL(ceph_print_client_options); 607 608 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client) 609 { 610 return &client->msgr.inst.addr; 611 } 612 EXPORT_SYMBOL(ceph_client_addr); 613 614 u64 ceph_client_gid(struct ceph_client *client) 615 { 616 return client->monc.auth->global_id; 617 } 618 EXPORT_SYMBOL(ceph_client_gid); 619 620 /* 621 * create a fresh client instance 622 */ 623 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private) 624 { 625 struct ceph_client *client; 626 struct ceph_entity_addr *myaddr = NULL; 627 int err; 628 629 err = wait_for_random_bytes(); 630 if (err < 0) 631 return ERR_PTR(err); 632 633 client = kzalloc(sizeof(*client), GFP_KERNEL); 634 if (client == NULL) 635 return ERR_PTR(-ENOMEM); 636 637 client->private = private; 638 client->options = opt; 639 640 mutex_init(&client->mount_mutex); 641 init_waitqueue_head(&client->auth_wq); 642 client->auth_err = 0; 643 644 client->extra_mon_dispatch = NULL; 645 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT; 646 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT; 647 648 if (!ceph_test_opt(client, NOMSGAUTH)) 649 client->required_features |= CEPH_FEATURE_MSG_AUTH; 650 651 /* msgr */ 652 if (ceph_test_opt(client, MYIP)) 653 myaddr = &client->options->my_addr; 654 655 ceph_messenger_init(&client->msgr, myaddr); 656 657 /* subsystems */ 658 err = ceph_monc_init(&client->monc, client); 659 if (err < 0) 660 goto fail; 661 err = ceph_osdc_init(&client->osdc, client); 662 if (err < 0) 663 goto fail_monc; 664 665 return client; 666 667 fail_monc: 668 ceph_monc_stop(&client->monc); 669 fail: 670 ceph_messenger_fini(&client->msgr); 671 kfree(client); 672 return ERR_PTR(err); 673 } 674 EXPORT_SYMBOL(ceph_create_client); 675 676 void ceph_destroy_client(struct ceph_client *client) 677 { 678 dout("destroy_client %p\n", client); 679 680 atomic_set(&client->msgr.stopping, 1); 681 682 /* unmount */ 683 ceph_osdc_stop(&client->osdc); 684 ceph_monc_stop(&client->monc); 685 ceph_messenger_fini(&client->msgr); 686 687 ceph_debugfs_client_cleanup(client); 688 689 ceph_destroy_options(client->options); 690 691 kfree(client); 692 dout("destroy_client %p done\n", client); 693 } 694 EXPORT_SYMBOL(ceph_destroy_client); 695 696 /* 697 * true if we have the mon map (and have thus joined the cluster) 698 */ 699 static bool have_mon_and_osd_map(struct ceph_client *client) 700 { 701 return client->monc.monmap && client->monc.monmap->epoch && 702 client->osdc.osdmap && client->osdc.osdmap->epoch; 703 } 704 705 /* 706 * mount: join the ceph cluster, and open root directory. 707 */ 708 int __ceph_open_session(struct ceph_client *client, unsigned long started) 709 { 710 unsigned long timeout = client->options->mount_timeout; 711 long err; 712 713 /* open session, and wait for mon and osd maps */ 714 err = ceph_monc_open_session(&client->monc); 715 if (err < 0) 716 return err; 717 718 while (!have_mon_and_osd_map(client)) { 719 if (timeout && time_after_eq(jiffies, started + timeout)) 720 return -ETIMEDOUT; 721 722 /* wait */ 723 dout("mount waiting for mon_map\n"); 724 err = wait_event_interruptible_timeout(client->auth_wq, 725 have_mon_and_osd_map(client) || (client->auth_err < 0), 726 ceph_timeout_jiffies(timeout)); 727 if (err < 0) 728 return err; 729 if (client->auth_err < 0) 730 return client->auth_err; 731 } 732 733 pr_info("client%llu fsid %pU\n", ceph_client_gid(client), 734 &client->fsid); 735 ceph_debugfs_client_init(client); 736 737 return 0; 738 } 739 EXPORT_SYMBOL(__ceph_open_session); 740 741 int ceph_open_session(struct ceph_client *client) 742 { 743 int ret; 744 unsigned long started = jiffies; /* note the start time */ 745 746 dout("open_session start\n"); 747 mutex_lock(&client->mount_mutex); 748 749 ret = __ceph_open_session(client, started); 750 751 mutex_unlock(&client->mount_mutex); 752 return ret; 753 } 754 EXPORT_SYMBOL(ceph_open_session); 755 756 int ceph_wait_for_latest_osdmap(struct ceph_client *client, 757 unsigned long timeout) 758 { 759 u64 newest_epoch; 760 int ret; 761 762 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch); 763 if (ret) 764 return ret; 765 766 if (client->osdc.osdmap->epoch >= newest_epoch) 767 return 0; 768 769 ceph_osdc_maybe_request_map(&client->osdc); 770 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout); 771 } 772 EXPORT_SYMBOL(ceph_wait_for_latest_osdmap); 773 774 static int __init init_ceph_lib(void) 775 { 776 int ret = 0; 777 778 ret = ceph_debugfs_init(); 779 if (ret < 0) 780 goto out; 781 782 ret = ceph_crypto_init(); 783 if (ret < 0) 784 goto out_debugfs; 785 786 ret = ceph_msgr_init(); 787 if (ret < 0) 788 goto out_crypto; 789 790 ret = ceph_osdc_setup(); 791 if (ret < 0) 792 goto out_msgr; 793 794 pr_info("loaded (mon/osd proto %d/%d)\n", 795 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL); 796 797 return 0; 798 799 out_msgr: 800 ceph_msgr_exit(); 801 out_crypto: 802 ceph_crypto_shutdown(); 803 out_debugfs: 804 ceph_debugfs_cleanup(); 805 out: 806 return ret; 807 } 808 809 static void __exit exit_ceph_lib(void) 810 { 811 dout("exit_ceph_lib\n"); 812 WARN_ON(!ceph_strings_empty()); 813 814 ceph_osdc_cleanup(); 815 ceph_msgr_exit(); 816 ceph_crypto_shutdown(); 817 ceph_debugfs_cleanup(); 818 } 819 820 module_init(init_ceph_lib); 821 module_exit(exit_ceph_lib); 822 823 MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); 824 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); 825 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); 826 MODULE_DESCRIPTION("Ceph core library"); 827 MODULE_LICENSE("GPL"); 828