1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include <linux/ceph/ceph_debug.h> 4 #include <linux/backing-dev.h> 5 #include <linux/ctype.h> 6 #include <linux/fs.h> 7 #include <linux/inet.h> 8 #include <linux/in6.h> 9 #include <linux/key.h> 10 #include <keys/ceph-type.h> 11 #include <linux/module.h> 12 #include <linux/mount.h> 13 #include <linux/nsproxy.h> 14 #include <linux/fs_parser.h> 15 #include <linux/sched.h> 16 #include <linux/sched/mm.h> 17 #include <linux/seq_file.h> 18 #include <linux/slab.h> 19 #include <linux/statfs.h> 20 #include <linux/string.h> 21 #include <linux/vmalloc.h> 22 23 24 #include <linux/ceph/ceph_features.h> 25 #include <linux/ceph/libceph.h> 26 #include <linux/ceph/debugfs.h> 27 #include <linux/ceph/decode.h> 28 #include <linux/ceph/mon_client.h> 29 #include <linux/ceph/auth.h> 30 #include "crypto.h" 31 32 33 /* 34 * Module compatibility interface. For now it doesn't do anything, 35 * but its existence signals a certain level of functionality. 36 * 37 * The data buffer is used to pass information both to and from 38 * libceph. The return value indicates whether libceph determines 39 * it is compatible with the caller (from another kernel module), 40 * given the provided data. 41 * 42 * The data pointer can be null. 43 */ 44 bool libceph_compatible(void *data) 45 { 46 return true; 47 } 48 EXPORT_SYMBOL(libceph_compatible); 49 50 static int param_get_supported_features(char *buffer, 51 const struct kernel_param *kp) 52 { 53 return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT); 54 } 55 static const struct kernel_param_ops param_ops_supported_features = { 56 .get = param_get_supported_features, 57 }; 58 module_param_cb(supported_features, ¶m_ops_supported_features, NULL, 59 0444); 60 61 const char *ceph_msg_type_name(int type) 62 { 63 switch (type) { 64 case CEPH_MSG_SHUTDOWN: return "shutdown"; 65 case CEPH_MSG_PING: return "ping"; 66 case CEPH_MSG_AUTH: return "auth"; 67 case CEPH_MSG_AUTH_REPLY: return "auth_reply"; 68 case CEPH_MSG_MON_MAP: return "mon_map"; 69 case CEPH_MSG_MON_GET_MAP: return "mon_get_map"; 70 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe"; 71 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack"; 72 case CEPH_MSG_STATFS: return "statfs"; 73 case CEPH_MSG_STATFS_REPLY: return "statfs_reply"; 74 case CEPH_MSG_MON_GET_VERSION: return "mon_get_version"; 75 case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply"; 76 case CEPH_MSG_MDS_MAP: return "mds_map"; 77 case CEPH_MSG_FS_MAP_USER: return "fs_map_user"; 78 case CEPH_MSG_CLIENT_SESSION: return "client_session"; 79 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect"; 80 case CEPH_MSG_CLIENT_REQUEST: return "client_request"; 81 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward"; 82 case CEPH_MSG_CLIENT_REPLY: return "client_reply"; 83 case CEPH_MSG_CLIENT_CAPS: return "client_caps"; 84 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release"; 85 case CEPH_MSG_CLIENT_QUOTA: return "client_quota"; 86 case CEPH_MSG_CLIENT_SNAP: return "client_snap"; 87 case CEPH_MSG_CLIENT_LEASE: return "client_lease"; 88 case CEPH_MSG_POOLOP_REPLY: return "poolop_reply"; 89 case CEPH_MSG_POOLOP: return "poolop"; 90 case CEPH_MSG_MON_COMMAND: return "mon_command"; 91 case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack"; 92 case CEPH_MSG_OSD_MAP: return "osd_map"; 93 case CEPH_MSG_OSD_OP: return "osd_op"; 94 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply"; 95 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify"; 96 case CEPH_MSG_OSD_BACKOFF: return "osd_backoff"; 97 default: return "unknown"; 98 } 99 } 100 EXPORT_SYMBOL(ceph_msg_type_name); 101 102 /* 103 * Initially learn our fsid, or verify an fsid matches. 104 */ 105 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid) 106 { 107 if (client->have_fsid) { 108 if (ceph_fsid_compare(&client->fsid, fsid)) { 109 pr_err("bad fsid, had %pU got %pU", 110 &client->fsid, fsid); 111 return -1; 112 } 113 } else { 114 memcpy(&client->fsid, fsid, sizeof(*fsid)); 115 } 116 return 0; 117 } 118 EXPORT_SYMBOL(ceph_check_fsid); 119 120 static int strcmp_null(const char *s1, const char *s2) 121 { 122 if (!s1 && !s2) 123 return 0; 124 if (s1 && !s2) 125 return -1; 126 if (!s1 && s2) 127 return 1; 128 return strcmp(s1, s2); 129 } 130 131 int ceph_compare_options(struct ceph_options *new_opt, 132 struct ceph_client *client) 133 { 134 struct ceph_options *opt1 = new_opt; 135 struct ceph_options *opt2 = client->options; 136 int ofs = offsetof(struct ceph_options, mon_addr); 137 int i; 138 int ret; 139 140 /* 141 * Don't bother comparing options if network namespaces don't 142 * match. 143 */ 144 if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net))) 145 return -1; 146 147 ret = memcmp(opt1, opt2, ofs); 148 if (ret) 149 return ret; 150 151 ret = strcmp_null(opt1->name, opt2->name); 152 if (ret) 153 return ret; 154 155 if (opt1->key && !opt2->key) 156 return -1; 157 if (!opt1->key && opt2->key) 158 return 1; 159 if (opt1->key && opt2->key) { 160 if (opt1->key->type != opt2->key->type) 161 return -1; 162 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec) 163 return -1; 164 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec) 165 return -1; 166 if (opt1->key->len != opt2->key->len) 167 return -1; 168 if (opt1->key->key && !opt2->key->key) 169 return -1; 170 if (!opt1->key->key && opt2->key->key) 171 return 1; 172 if (opt1->key->key && opt2->key->key) { 173 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len); 174 if (ret) 175 return ret; 176 } 177 } 178 179 /* any matching mon ip implies a match */ 180 for (i = 0; i < opt1->num_mon; i++) { 181 if (ceph_monmap_contains(client->monc.monmap, 182 &opt1->mon_addr[i])) 183 return 0; 184 } 185 return -1; 186 } 187 EXPORT_SYMBOL(ceph_compare_options); 188 189 /* 190 * kvmalloc() doesn't fall back to the vmalloc allocator unless flags are 191 * compatible with (a superset of) GFP_KERNEL. This is because while the 192 * actual pages are allocated with the specified flags, the page table pages 193 * are always allocated with GFP_KERNEL. map_vm_area() doesn't even take 194 * flags because GFP_KERNEL is hard-coded in {p4d,pud,pmd,pte}_alloc(). 195 * 196 * ceph_kvmalloc() may be called with GFP_KERNEL, GFP_NOFS or GFP_NOIO. 197 */ 198 void *ceph_kvmalloc(size_t size, gfp_t flags) 199 { 200 void *p; 201 202 if ((flags & (__GFP_IO | __GFP_FS)) == (__GFP_IO | __GFP_FS)) { 203 p = kvmalloc(size, flags); 204 } else if ((flags & (__GFP_IO | __GFP_FS)) == __GFP_IO) { 205 unsigned int nofs_flag = memalloc_nofs_save(); 206 p = kvmalloc(size, GFP_KERNEL); 207 memalloc_nofs_restore(nofs_flag); 208 } else { 209 unsigned int noio_flag = memalloc_noio_save(); 210 p = kvmalloc(size, GFP_KERNEL); 211 memalloc_noio_restore(noio_flag); 212 } 213 214 return p; 215 } 216 217 static int parse_fsid(const char *str, struct ceph_fsid *fsid) 218 { 219 int i = 0; 220 char tmp[3]; 221 int err = -EINVAL; 222 int d; 223 224 dout("parse_fsid '%s'\n", str); 225 tmp[2] = 0; 226 while (*str && i < 16) { 227 if (ispunct(*str)) { 228 str++; 229 continue; 230 } 231 if (!isxdigit(str[0]) || !isxdigit(str[1])) 232 break; 233 tmp[0] = str[0]; 234 tmp[1] = str[1]; 235 if (sscanf(tmp, "%x", &d) < 1) 236 break; 237 fsid->fsid[i] = d & 0xff; 238 i++; 239 str += 2; 240 } 241 242 if (i == 16) 243 err = 0; 244 dout("parse_fsid ret %d got fsid %pU\n", err, fsid); 245 return err; 246 } 247 248 /* 249 * ceph options 250 */ 251 enum { 252 Opt_osdtimeout, 253 Opt_osdkeepalivetimeout, 254 Opt_mount_timeout, 255 Opt_osd_idle_ttl, 256 Opt_osd_request_timeout, 257 /* int args above */ 258 Opt_fsid, 259 Opt_name, 260 Opt_secret, 261 Opt_key, 262 Opt_ip, 263 /* string args above */ 264 Opt_share, 265 Opt_crc, 266 Opt_cephx_require_signatures, 267 Opt_cephx_sign_messages, 268 Opt_tcp_nodelay, 269 Opt_abort_on_full, 270 }; 271 272 static const struct fs_parameter_spec ceph_parameters[] = { 273 fsparam_flag ("abort_on_full", Opt_abort_on_full), 274 fsparam_flag_no ("cephx_require_signatures", Opt_cephx_require_signatures), 275 fsparam_flag_no ("cephx_sign_messages", Opt_cephx_sign_messages), 276 fsparam_flag_no ("crc", Opt_crc), 277 fsparam_string ("fsid", Opt_fsid), 278 fsparam_string ("ip", Opt_ip), 279 fsparam_string ("key", Opt_key), 280 fsparam_u32 ("mount_timeout", Opt_mount_timeout), 281 fsparam_string ("name", Opt_name), 282 fsparam_u32 ("osd_idle_ttl", Opt_osd_idle_ttl), 283 fsparam_u32 ("osd_request_timeout", Opt_osd_request_timeout), 284 fsparam_u32 ("osdkeepalive", Opt_osdkeepalivetimeout), 285 __fsparam (fs_param_is_s32, "osdtimeout", Opt_osdtimeout, 286 fs_param_deprecated, NULL), 287 fsparam_string ("secret", Opt_secret), 288 fsparam_flag_no ("share", Opt_share), 289 fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay), 290 {} 291 }; 292 293 struct ceph_options *ceph_alloc_options(void) 294 { 295 struct ceph_options *opt; 296 297 opt = kzalloc(sizeof(*opt), GFP_KERNEL); 298 if (!opt) 299 return NULL; 300 301 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr), 302 GFP_KERNEL); 303 if (!opt->mon_addr) { 304 kfree(opt); 305 return NULL; 306 } 307 308 opt->flags = CEPH_OPT_DEFAULT; 309 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT; 310 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; 311 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; 312 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT; 313 return opt; 314 } 315 EXPORT_SYMBOL(ceph_alloc_options); 316 317 void ceph_destroy_options(struct ceph_options *opt) 318 { 319 dout("destroy_options %p\n", opt); 320 if (!opt) 321 return; 322 323 kfree(opt->name); 324 if (opt->key) { 325 ceph_crypto_key_destroy(opt->key); 326 kfree(opt->key); 327 } 328 kfree(opt->mon_addr); 329 kfree(opt); 330 } 331 EXPORT_SYMBOL(ceph_destroy_options); 332 333 /* get secret from key store */ 334 static int get_secret(struct ceph_crypto_key *dst, const char *name, 335 struct p_log *log) 336 { 337 struct key *ukey; 338 int key_err; 339 int err = 0; 340 struct ceph_crypto_key *ckey; 341 342 ukey = request_key(&key_type_ceph, name, NULL); 343 if (IS_ERR(ukey)) { 344 /* request_key errors don't map nicely to mount(2) 345 errors; don't even try, but still printk */ 346 key_err = PTR_ERR(ukey); 347 switch (key_err) { 348 case -ENOKEY: 349 error_plog(log, "Failed due to key not found: %s", 350 name); 351 break; 352 case -EKEYEXPIRED: 353 error_plog(log, "Failed due to expired key: %s", 354 name); 355 break; 356 case -EKEYREVOKED: 357 error_plog(log, "Failed due to revoked key: %s", 358 name); 359 break; 360 default: 361 error_plog(log, "Failed due to key error %d: %s", 362 key_err, name); 363 } 364 err = -EPERM; 365 goto out; 366 } 367 368 ckey = ukey->payload.data[0]; 369 err = ceph_crypto_key_clone(dst, ckey); 370 if (err) 371 goto out_key; 372 /* pass through, err is 0 */ 373 374 out_key: 375 key_put(ukey); 376 out: 377 return err; 378 } 379 380 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt, 381 struct fc_log *l) 382 { 383 struct p_log log = {.prefix = "libceph", .log = l}; 384 int ret; 385 386 /* ip1[:port1][,ip2[:port2]...] */ 387 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON, 388 &opt->num_mon); 389 if (ret) { 390 error_plog(&log, "Failed to parse monitor IPs: %d", ret); 391 return ret; 392 } 393 394 return 0; 395 } 396 EXPORT_SYMBOL(ceph_parse_mon_ips); 397 398 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt, 399 struct fc_log *l) 400 { 401 struct fs_parse_result result; 402 int token, err; 403 struct p_log log = {.prefix = "libceph", .log = l}; 404 405 token = __fs_parse(&log, ceph_parameters, param, &result); 406 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token); 407 if (token < 0) 408 return token; 409 410 switch (token) { 411 case Opt_ip: 412 err = ceph_parse_ips(param->string, 413 param->string + param->size, 414 &opt->my_addr, 415 1, NULL); 416 if (err) { 417 error_plog(&log, "Failed to parse ip: %d", err); 418 return err; 419 } 420 opt->flags |= CEPH_OPT_MYIP; 421 break; 422 423 case Opt_fsid: 424 err = parse_fsid(param->string, &opt->fsid); 425 if (err) { 426 error_plog(&log, "Failed to parse fsid: %d", err); 427 return err; 428 } 429 opt->flags |= CEPH_OPT_FSID; 430 break; 431 case Opt_name: 432 kfree(opt->name); 433 opt->name = param->string; 434 param->string = NULL; 435 break; 436 case Opt_secret: 437 ceph_crypto_key_destroy(opt->key); 438 kfree(opt->key); 439 440 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 441 if (!opt->key) 442 return -ENOMEM; 443 err = ceph_crypto_key_unarmor(opt->key, param->string); 444 if (err) { 445 error_plog(&log, "Failed to parse secret: %d", err); 446 return err; 447 } 448 break; 449 case Opt_key: 450 ceph_crypto_key_destroy(opt->key); 451 kfree(opt->key); 452 453 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 454 if (!opt->key) 455 return -ENOMEM; 456 return get_secret(opt->key, param->string, &log); 457 458 case Opt_osdtimeout: 459 warn_plog(&log, "Ignoring osdtimeout"); 460 break; 461 case Opt_osdkeepalivetimeout: 462 /* 0 isn't well defined right now, reject it */ 463 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000) 464 goto out_of_range; 465 opt->osd_keepalive_timeout = 466 msecs_to_jiffies(result.uint_32 * 1000); 467 break; 468 case Opt_osd_idle_ttl: 469 /* 0 isn't well defined right now, reject it */ 470 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000) 471 goto out_of_range; 472 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000); 473 break; 474 case Opt_mount_timeout: 475 /* 0 is "wait forever" (i.e. infinite timeout) */ 476 if (result.uint_32 > INT_MAX / 1000) 477 goto out_of_range; 478 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000); 479 break; 480 case Opt_osd_request_timeout: 481 /* 0 is "wait forever" (i.e. infinite timeout) */ 482 if (result.uint_32 > INT_MAX / 1000) 483 goto out_of_range; 484 opt->osd_request_timeout = 485 msecs_to_jiffies(result.uint_32 * 1000); 486 break; 487 488 case Opt_share: 489 if (!result.negated) 490 opt->flags &= ~CEPH_OPT_NOSHARE; 491 else 492 opt->flags |= CEPH_OPT_NOSHARE; 493 break; 494 case Opt_crc: 495 if (!result.negated) 496 opt->flags &= ~CEPH_OPT_NOCRC; 497 else 498 opt->flags |= CEPH_OPT_NOCRC; 499 break; 500 case Opt_cephx_require_signatures: 501 if (!result.negated) 502 opt->flags &= ~CEPH_OPT_NOMSGAUTH; 503 else 504 opt->flags |= CEPH_OPT_NOMSGAUTH; 505 break; 506 case Opt_cephx_sign_messages: 507 if (!result.negated) 508 opt->flags &= ~CEPH_OPT_NOMSGSIGN; 509 else 510 opt->flags |= CEPH_OPT_NOMSGSIGN; 511 break; 512 case Opt_tcp_nodelay: 513 if (!result.negated) 514 opt->flags |= CEPH_OPT_TCP_NODELAY; 515 else 516 opt->flags &= ~CEPH_OPT_TCP_NODELAY; 517 break; 518 519 case Opt_abort_on_full: 520 opt->flags |= CEPH_OPT_ABORT_ON_FULL; 521 break; 522 523 default: 524 BUG(); 525 } 526 527 return 0; 528 529 out_of_range: 530 return inval_plog(&log, "%s out of range", param->key); 531 } 532 EXPORT_SYMBOL(ceph_parse_param); 533 534 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client, 535 bool show_all) 536 { 537 struct ceph_options *opt = client->options; 538 size_t pos = m->count; 539 540 if (opt->name) { 541 seq_puts(m, "name="); 542 seq_escape(m, opt->name, ", \t\n\\"); 543 seq_putc(m, ','); 544 } 545 if (opt->key) 546 seq_puts(m, "secret=<hidden>,"); 547 548 if (opt->flags & CEPH_OPT_FSID) 549 seq_printf(m, "fsid=%pU,", &opt->fsid); 550 if (opt->flags & CEPH_OPT_NOSHARE) 551 seq_puts(m, "noshare,"); 552 if (opt->flags & CEPH_OPT_NOCRC) 553 seq_puts(m, "nocrc,"); 554 if (opt->flags & CEPH_OPT_NOMSGAUTH) 555 seq_puts(m, "nocephx_require_signatures,"); 556 if (opt->flags & CEPH_OPT_NOMSGSIGN) 557 seq_puts(m, "nocephx_sign_messages,"); 558 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0) 559 seq_puts(m, "notcp_nodelay,"); 560 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL)) 561 seq_puts(m, "abort_on_full,"); 562 563 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) 564 seq_printf(m, "mount_timeout=%d,", 565 jiffies_to_msecs(opt->mount_timeout) / 1000); 566 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) 567 seq_printf(m, "osd_idle_ttl=%d,", 568 jiffies_to_msecs(opt->osd_idle_ttl) / 1000); 569 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) 570 seq_printf(m, "osdkeepalivetimeout=%d,", 571 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000); 572 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT) 573 seq_printf(m, "osd_request_timeout=%d,", 574 jiffies_to_msecs(opt->osd_request_timeout) / 1000); 575 576 /* drop redundant comma */ 577 if (m->count != pos) 578 m->count--; 579 580 return 0; 581 } 582 EXPORT_SYMBOL(ceph_print_client_options); 583 584 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client) 585 { 586 return &client->msgr.inst.addr; 587 } 588 EXPORT_SYMBOL(ceph_client_addr); 589 590 u64 ceph_client_gid(struct ceph_client *client) 591 { 592 return client->monc.auth->global_id; 593 } 594 EXPORT_SYMBOL(ceph_client_gid); 595 596 /* 597 * create a fresh client instance 598 */ 599 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private) 600 { 601 struct ceph_client *client; 602 struct ceph_entity_addr *myaddr = NULL; 603 int err; 604 605 err = wait_for_random_bytes(); 606 if (err < 0) 607 return ERR_PTR(err); 608 609 client = kzalloc(sizeof(*client), GFP_KERNEL); 610 if (client == NULL) 611 return ERR_PTR(-ENOMEM); 612 613 client->private = private; 614 client->options = opt; 615 616 mutex_init(&client->mount_mutex); 617 init_waitqueue_head(&client->auth_wq); 618 client->auth_err = 0; 619 620 client->extra_mon_dispatch = NULL; 621 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT; 622 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT; 623 624 if (!ceph_test_opt(client, NOMSGAUTH)) 625 client->required_features |= CEPH_FEATURE_MSG_AUTH; 626 627 /* msgr */ 628 if (ceph_test_opt(client, MYIP)) 629 myaddr = &client->options->my_addr; 630 631 ceph_messenger_init(&client->msgr, myaddr); 632 633 /* subsystems */ 634 err = ceph_monc_init(&client->monc, client); 635 if (err < 0) 636 goto fail; 637 err = ceph_osdc_init(&client->osdc, client); 638 if (err < 0) 639 goto fail_monc; 640 641 return client; 642 643 fail_monc: 644 ceph_monc_stop(&client->monc); 645 fail: 646 ceph_messenger_fini(&client->msgr); 647 kfree(client); 648 return ERR_PTR(err); 649 } 650 EXPORT_SYMBOL(ceph_create_client); 651 652 void ceph_destroy_client(struct ceph_client *client) 653 { 654 dout("destroy_client %p\n", client); 655 656 atomic_set(&client->msgr.stopping, 1); 657 658 /* unmount */ 659 ceph_osdc_stop(&client->osdc); 660 ceph_monc_stop(&client->monc); 661 ceph_messenger_fini(&client->msgr); 662 663 ceph_debugfs_client_cleanup(client); 664 665 ceph_destroy_options(client->options); 666 667 kfree(client); 668 dout("destroy_client %p done\n", client); 669 } 670 EXPORT_SYMBOL(ceph_destroy_client); 671 672 void ceph_reset_client_addr(struct ceph_client *client) 673 { 674 ceph_messenger_reset_nonce(&client->msgr); 675 ceph_monc_reopen_session(&client->monc); 676 ceph_osdc_reopen_osds(&client->osdc); 677 } 678 EXPORT_SYMBOL(ceph_reset_client_addr); 679 680 /* 681 * true if we have the mon map (and have thus joined the cluster) 682 */ 683 static bool have_mon_and_osd_map(struct ceph_client *client) 684 { 685 return client->monc.monmap && client->monc.monmap->epoch && 686 client->osdc.osdmap && client->osdc.osdmap->epoch; 687 } 688 689 /* 690 * mount: join the ceph cluster, and open root directory. 691 */ 692 int __ceph_open_session(struct ceph_client *client, unsigned long started) 693 { 694 unsigned long timeout = client->options->mount_timeout; 695 long err; 696 697 /* open session, and wait for mon and osd maps */ 698 err = ceph_monc_open_session(&client->monc); 699 if (err < 0) 700 return err; 701 702 while (!have_mon_and_osd_map(client)) { 703 if (timeout && time_after_eq(jiffies, started + timeout)) 704 return -ETIMEDOUT; 705 706 /* wait */ 707 dout("mount waiting for mon_map\n"); 708 err = wait_event_interruptible_timeout(client->auth_wq, 709 have_mon_and_osd_map(client) || (client->auth_err < 0), 710 ceph_timeout_jiffies(timeout)); 711 if (err < 0) 712 return err; 713 if (client->auth_err < 0) 714 return client->auth_err; 715 } 716 717 pr_info("client%llu fsid %pU\n", ceph_client_gid(client), 718 &client->fsid); 719 ceph_debugfs_client_init(client); 720 721 return 0; 722 } 723 EXPORT_SYMBOL(__ceph_open_session); 724 725 int ceph_open_session(struct ceph_client *client) 726 { 727 int ret; 728 unsigned long started = jiffies; /* note the start time */ 729 730 dout("open_session start\n"); 731 mutex_lock(&client->mount_mutex); 732 733 ret = __ceph_open_session(client, started); 734 735 mutex_unlock(&client->mount_mutex); 736 return ret; 737 } 738 EXPORT_SYMBOL(ceph_open_session); 739 740 int ceph_wait_for_latest_osdmap(struct ceph_client *client, 741 unsigned long timeout) 742 { 743 u64 newest_epoch; 744 int ret; 745 746 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch); 747 if (ret) 748 return ret; 749 750 if (client->osdc.osdmap->epoch >= newest_epoch) 751 return 0; 752 753 ceph_osdc_maybe_request_map(&client->osdc); 754 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout); 755 } 756 EXPORT_SYMBOL(ceph_wait_for_latest_osdmap); 757 758 static int __init init_ceph_lib(void) 759 { 760 int ret = 0; 761 762 ceph_debugfs_init(); 763 764 ret = ceph_crypto_init(); 765 if (ret < 0) 766 goto out_debugfs; 767 768 ret = ceph_msgr_init(); 769 if (ret < 0) 770 goto out_crypto; 771 772 ret = ceph_osdc_setup(); 773 if (ret < 0) 774 goto out_msgr; 775 776 pr_info("loaded (mon/osd proto %d/%d)\n", 777 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL); 778 779 return 0; 780 781 out_msgr: 782 ceph_msgr_exit(); 783 out_crypto: 784 ceph_crypto_shutdown(); 785 out_debugfs: 786 ceph_debugfs_cleanup(); 787 return ret; 788 } 789 790 static void __exit exit_ceph_lib(void) 791 { 792 dout("exit_ceph_lib\n"); 793 WARN_ON(!ceph_strings_empty()); 794 795 ceph_osdc_cleanup(); 796 ceph_msgr_exit(); 797 ceph_crypto_shutdown(); 798 ceph_debugfs_cleanup(); 799 } 800 801 module_init(init_ceph_lib); 802 module_exit(exit_ceph_lib); 803 804 MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); 805 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); 806 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); 807 MODULE_DESCRIPTION("Ceph core library"); 808 MODULE_LICENSE("GPL"); 809