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 ret = ceph_compare_crush_locs(&opt1->crush_locs, &opt2->crush_locs); 180 if (ret) 181 return ret; 182 183 /* any matching mon ip implies a match */ 184 for (i = 0; i < opt1->num_mon; i++) { 185 if (ceph_monmap_contains(client->monc.monmap, 186 &opt1->mon_addr[i])) 187 return 0; 188 } 189 return -1; 190 } 191 EXPORT_SYMBOL(ceph_compare_options); 192 193 /* 194 * kvmalloc() doesn't fall back to the vmalloc allocator unless flags are 195 * compatible with (a superset of) GFP_KERNEL. This is because while the 196 * actual pages are allocated with the specified flags, the page table pages 197 * are always allocated with GFP_KERNEL. 198 * 199 * ceph_kvmalloc() may be called with GFP_KERNEL, GFP_NOFS or GFP_NOIO. 200 */ 201 void *ceph_kvmalloc(size_t size, gfp_t flags) 202 { 203 void *p; 204 205 if ((flags & (__GFP_IO | __GFP_FS)) == (__GFP_IO | __GFP_FS)) { 206 p = kvmalloc(size, flags); 207 } else if ((flags & (__GFP_IO | __GFP_FS)) == __GFP_IO) { 208 unsigned int nofs_flag = memalloc_nofs_save(); 209 p = kvmalloc(size, GFP_KERNEL); 210 memalloc_nofs_restore(nofs_flag); 211 } else { 212 unsigned int noio_flag = memalloc_noio_save(); 213 p = kvmalloc(size, GFP_KERNEL); 214 memalloc_noio_restore(noio_flag); 215 } 216 217 return p; 218 } 219 220 static int parse_fsid(const char *str, struct ceph_fsid *fsid) 221 { 222 int i = 0; 223 char tmp[3]; 224 int err = -EINVAL; 225 int d; 226 227 dout("parse_fsid '%s'\n", str); 228 tmp[2] = 0; 229 while (*str && i < 16) { 230 if (ispunct(*str)) { 231 str++; 232 continue; 233 } 234 if (!isxdigit(str[0]) || !isxdigit(str[1])) 235 break; 236 tmp[0] = str[0]; 237 tmp[1] = str[1]; 238 if (sscanf(tmp, "%x", &d) < 1) 239 break; 240 fsid->fsid[i] = d & 0xff; 241 i++; 242 str += 2; 243 } 244 245 if (i == 16) 246 err = 0; 247 dout("parse_fsid ret %d got fsid %pU\n", err, fsid); 248 return err; 249 } 250 251 /* 252 * ceph options 253 */ 254 enum { 255 Opt_osdkeepalivetimeout, 256 Opt_mount_timeout, 257 Opt_osd_idle_ttl, 258 Opt_osd_request_timeout, 259 /* int args above */ 260 Opt_fsid, 261 Opt_name, 262 Opt_secret, 263 Opt_key, 264 Opt_ip, 265 Opt_crush_location, 266 Opt_read_from_replica, 267 Opt_ms_mode, 268 /* string args above */ 269 Opt_share, 270 Opt_crc, 271 Opt_cephx_require_signatures, 272 Opt_cephx_sign_messages, 273 Opt_tcp_nodelay, 274 Opt_abort_on_full, 275 }; 276 277 enum { 278 Opt_read_from_replica_no, 279 Opt_read_from_replica_balance, 280 Opt_read_from_replica_localize, 281 }; 282 283 static const struct constant_table ceph_param_read_from_replica[] = { 284 {"no", Opt_read_from_replica_no}, 285 {"balance", Opt_read_from_replica_balance}, 286 {"localize", Opt_read_from_replica_localize}, 287 {} 288 }; 289 290 enum ceph_ms_mode { 291 Opt_ms_mode_legacy, 292 Opt_ms_mode_crc, 293 Opt_ms_mode_secure, 294 Opt_ms_mode_prefer_crc, 295 Opt_ms_mode_prefer_secure 296 }; 297 298 static const struct constant_table ceph_param_ms_mode[] = { 299 {"legacy", Opt_ms_mode_legacy}, 300 {"crc", Opt_ms_mode_crc}, 301 {"secure", Opt_ms_mode_secure}, 302 {"prefer-crc", Opt_ms_mode_prefer_crc}, 303 {"prefer-secure", Opt_ms_mode_prefer_secure}, 304 {} 305 }; 306 307 static const struct fs_parameter_spec ceph_parameters[] = { 308 fsparam_flag ("abort_on_full", Opt_abort_on_full), 309 __fsparam (NULL, "cephx_require_signatures", Opt_cephx_require_signatures, 310 fs_param_neg_with_no|fs_param_deprecated, NULL), 311 fsparam_flag_no ("cephx_sign_messages", Opt_cephx_sign_messages), 312 fsparam_flag_no ("crc", Opt_crc), 313 fsparam_string ("crush_location", Opt_crush_location), 314 fsparam_string ("fsid", Opt_fsid), 315 fsparam_string ("ip", Opt_ip), 316 fsparam_string ("key", Opt_key), 317 fsparam_u32 ("mount_timeout", Opt_mount_timeout), 318 fsparam_string ("name", Opt_name), 319 fsparam_u32 ("osd_idle_ttl", Opt_osd_idle_ttl), 320 fsparam_u32 ("osd_request_timeout", Opt_osd_request_timeout), 321 fsparam_u32 ("osdkeepalive", Opt_osdkeepalivetimeout), 322 fsparam_enum ("read_from_replica", Opt_read_from_replica, 323 ceph_param_read_from_replica), 324 fsparam_enum ("ms_mode", Opt_ms_mode, 325 ceph_param_ms_mode), 326 fsparam_string ("secret", Opt_secret), 327 fsparam_flag_no ("share", Opt_share), 328 fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay), 329 {} 330 }; 331 332 struct ceph_options *ceph_alloc_options(void) 333 { 334 struct ceph_options *opt; 335 336 opt = kzalloc(sizeof(*opt), GFP_KERNEL); 337 if (!opt) 338 return NULL; 339 340 opt->crush_locs = RB_ROOT; 341 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr), 342 GFP_KERNEL); 343 if (!opt->mon_addr) { 344 kfree(opt); 345 return NULL; 346 } 347 348 opt->flags = CEPH_OPT_DEFAULT; 349 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT; 350 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; 351 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; 352 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT; 353 opt->read_from_replica = CEPH_READ_FROM_REPLICA_DEFAULT; 354 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN; 355 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN; 356 return opt; 357 } 358 EXPORT_SYMBOL(ceph_alloc_options); 359 360 void ceph_destroy_options(struct ceph_options *opt) 361 { 362 dout("destroy_options %p\n", opt); 363 if (!opt) 364 return; 365 366 ceph_clear_crush_locs(&opt->crush_locs); 367 kfree(opt->name); 368 if (opt->key) { 369 ceph_crypto_key_destroy(opt->key); 370 kfree(opt->key); 371 } 372 kfree(opt->mon_addr); 373 kfree(opt); 374 } 375 EXPORT_SYMBOL(ceph_destroy_options); 376 377 /* get secret from key store */ 378 static int get_secret(struct ceph_crypto_key *dst, const char *name, 379 struct p_log *log) 380 { 381 struct key *ukey; 382 int key_err; 383 int err = 0; 384 struct ceph_crypto_key *ckey; 385 386 ukey = request_key(&key_type_ceph, name, NULL); 387 if (IS_ERR(ukey)) { 388 /* request_key errors don't map nicely to mount(2) 389 errors; don't even try, but still printk */ 390 key_err = PTR_ERR(ukey); 391 switch (key_err) { 392 case -ENOKEY: 393 error_plog(log, "Failed due to key not found: %s", 394 name); 395 break; 396 case -EKEYEXPIRED: 397 error_plog(log, "Failed due to expired key: %s", 398 name); 399 break; 400 case -EKEYREVOKED: 401 error_plog(log, "Failed due to revoked key: %s", 402 name); 403 break; 404 default: 405 error_plog(log, "Failed due to key error %d: %s", 406 key_err, name); 407 } 408 err = -EPERM; 409 goto out; 410 } 411 412 ckey = ukey->payload.data[0]; 413 err = ceph_crypto_key_clone(dst, ckey); 414 if (err) 415 goto out_key; 416 /* pass through, err is 0 */ 417 418 out_key: 419 key_put(ukey); 420 out: 421 return err; 422 } 423 424 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt, 425 struct fc_log *l, char delim) 426 { 427 struct p_log log = {.prefix = "libceph", .log = l}; 428 int ret; 429 430 /* ip1[:port1][<delim>ip2[:port2]...] */ 431 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON, 432 &opt->num_mon, delim); 433 if (ret) { 434 error_plog(&log, "Failed to parse monitor IPs: %d", ret); 435 return ret; 436 } 437 438 return 0; 439 } 440 EXPORT_SYMBOL(ceph_parse_mon_ips); 441 442 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt, 443 struct fc_log *l) 444 { 445 struct fs_parse_result result; 446 int token, err; 447 struct p_log log = {.prefix = "libceph", .log = l}; 448 449 token = __fs_parse(&log, ceph_parameters, param, &result); 450 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token); 451 if (token < 0) 452 return token; 453 454 switch (token) { 455 case Opt_ip: 456 err = ceph_parse_ips(param->string, 457 param->string + param->size, 458 &opt->my_addr, 1, NULL, ','); 459 if (err) { 460 error_plog(&log, "Failed to parse ip: %d", err); 461 return err; 462 } 463 opt->flags |= CEPH_OPT_MYIP; 464 break; 465 466 case Opt_fsid: 467 err = parse_fsid(param->string, &opt->fsid); 468 if (err) { 469 error_plog(&log, "Failed to parse fsid: %d", err); 470 return err; 471 } 472 opt->flags |= CEPH_OPT_FSID; 473 break; 474 case Opt_name: 475 kfree(opt->name); 476 opt->name = param->string; 477 param->string = NULL; 478 break; 479 case Opt_secret: 480 ceph_crypto_key_destroy(opt->key); 481 kfree(opt->key); 482 483 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 484 if (!opt->key) 485 return -ENOMEM; 486 err = ceph_crypto_key_unarmor(opt->key, param->string); 487 if (err) { 488 error_plog(&log, "Failed to parse secret: %d", err); 489 return err; 490 } 491 break; 492 case Opt_key: 493 ceph_crypto_key_destroy(opt->key); 494 kfree(opt->key); 495 496 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL); 497 if (!opt->key) 498 return -ENOMEM; 499 return get_secret(opt->key, param->string, &log); 500 case Opt_crush_location: 501 ceph_clear_crush_locs(&opt->crush_locs); 502 err = ceph_parse_crush_location(param->string, 503 &opt->crush_locs); 504 if (err) { 505 error_plog(&log, "Failed to parse CRUSH location: %d", 506 err); 507 return err; 508 } 509 break; 510 case Opt_read_from_replica: 511 switch (result.uint_32) { 512 case Opt_read_from_replica_no: 513 opt->read_from_replica = 0; 514 break; 515 case Opt_read_from_replica_balance: 516 opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS; 517 break; 518 case Opt_read_from_replica_localize: 519 opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS; 520 break; 521 default: 522 BUG(); 523 } 524 break; 525 case Opt_ms_mode: 526 switch (result.uint_32) { 527 case Opt_ms_mode_legacy: 528 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN; 529 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN; 530 break; 531 case Opt_ms_mode_crc: 532 opt->con_modes[0] = CEPH_CON_MODE_CRC; 533 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN; 534 break; 535 case Opt_ms_mode_secure: 536 opt->con_modes[0] = CEPH_CON_MODE_SECURE; 537 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN; 538 break; 539 case Opt_ms_mode_prefer_crc: 540 opt->con_modes[0] = CEPH_CON_MODE_CRC; 541 opt->con_modes[1] = CEPH_CON_MODE_SECURE; 542 break; 543 case Opt_ms_mode_prefer_secure: 544 opt->con_modes[0] = CEPH_CON_MODE_SECURE; 545 opt->con_modes[1] = CEPH_CON_MODE_CRC; 546 break; 547 default: 548 BUG(); 549 } 550 break; 551 552 case Opt_osdkeepalivetimeout: 553 /* 0 isn't well defined right now, reject it */ 554 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000) 555 goto out_of_range; 556 opt->osd_keepalive_timeout = 557 msecs_to_jiffies(result.uint_32 * 1000); 558 break; 559 case Opt_osd_idle_ttl: 560 /* 0 isn't well defined right now, reject it */ 561 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000) 562 goto out_of_range; 563 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000); 564 break; 565 case Opt_mount_timeout: 566 /* 0 is "wait forever" (i.e. infinite timeout) */ 567 if (result.uint_32 > INT_MAX / 1000) 568 goto out_of_range; 569 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000); 570 break; 571 case Opt_osd_request_timeout: 572 /* 0 is "wait forever" (i.e. infinite timeout) */ 573 if (result.uint_32 > INT_MAX / 1000) 574 goto out_of_range; 575 opt->osd_request_timeout = 576 msecs_to_jiffies(result.uint_32 * 1000); 577 break; 578 579 case Opt_share: 580 if (!result.negated) 581 opt->flags &= ~CEPH_OPT_NOSHARE; 582 else 583 opt->flags |= CEPH_OPT_NOSHARE; 584 break; 585 case Opt_crc: 586 if (!result.negated) 587 opt->flags &= ~CEPH_OPT_NOCRC; 588 else 589 opt->flags |= CEPH_OPT_NOCRC; 590 break; 591 case Opt_cephx_require_signatures: 592 if (!result.negated) 593 warn_plog(&log, "Ignoring cephx_require_signatures"); 594 else 595 warn_plog(&log, "Ignoring nocephx_require_signatures, use nocephx_sign_messages"); 596 break; 597 case Opt_cephx_sign_messages: 598 if (!result.negated) 599 opt->flags &= ~CEPH_OPT_NOMSGSIGN; 600 else 601 opt->flags |= CEPH_OPT_NOMSGSIGN; 602 break; 603 case Opt_tcp_nodelay: 604 if (!result.negated) 605 opt->flags |= CEPH_OPT_TCP_NODELAY; 606 else 607 opt->flags &= ~CEPH_OPT_TCP_NODELAY; 608 break; 609 610 case Opt_abort_on_full: 611 opt->flags |= CEPH_OPT_ABORT_ON_FULL; 612 break; 613 614 default: 615 BUG(); 616 } 617 618 return 0; 619 620 out_of_range: 621 return inval_plog(&log, "%s out of range", param->key); 622 } 623 EXPORT_SYMBOL(ceph_parse_param); 624 625 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client, 626 bool show_all) 627 { 628 struct ceph_options *opt = client->options; 629 size_t pos = m->count; 630 struct rb_node *n; 631 632 if (opt->name) { 633 seq_puts(m, "name="); 634 seq_escape(m, opt->name, ", \t\n\\"); 635 seq_putc(m, ','); 636 } 637 if (opt->key) 638 seq_puts(m, "secret=<hidden>,"); 639 640 if (!RB_EMPTY_ROOT(&opt->crush_locs)) { 641 seq_puts(m, "crush_location="); 642 for (n = rb_first(&opt->crush_locs); ; ) { 643 struct crush_loc_node *loc = 644 rb_entry(n, struct crush_loc_node, cl_node); 645 646 seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name, 647 loc->cl_loc.cl_name); 648 n = rb_next(n); 649 if (!n) 650 break; 651 652 seq_putc(m, '|'); 653 } 654 seq_putc(m, ','); 655 } 656 if (opt->read_from_replica == CEPH_OSD_FLAG_BALANCE_READS) { 657 seq_puts(m, "read_from_replica=balance,"); 658 } else if (opt->read_from_replica == CEPH_OSD_FLAG_LOCALIZE_READS) { 659 seq_puts(m, "read_from_replica=localize,"); 660 } 661 if (opt->con_modes[0] != CEPH_CON_MODE_UNKNOWN) { 662 if (opt->con_modes[0] == CEPH_CON_MODE_CRC && 663 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) { 664 seq_puts(m, "ms_mode=crc,"); 665 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE && 666 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) { 667 seq_puts(m, "ms_mode=secure,"); 668 } else if (opt->con_modes[0] == CEPH_CON_MODE_CRC && 669 opt->con_modes[1] == CEPH_CON_MODE_SECURE) { 670 seq_puts(m, "ms_mode=prefer-crc,"); 671 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE && 672 opt->con_modes[1] == CEPH_CON_MODE_CRC) { 673 seq_puts(m, "ms_mode=prefer-secure,"); 674 } 675 } 676 677 if (opt->flags & CEPH_OPT_FSID) 678 seq_printf(m, "fsid=%pU,", &opt->fsid); 679 if (opt->flags & CEPH_OPT_NOSHARE) 680 seq_puts(m, "noshare,"); 681 if (opt->flags & CEPH_OPT_NOCRC) 682 seq_puts(m, "nocrc,"); 683 if (opt->flags & CEPH_OPT_NOMSGSIGN) 684 seq_puts(m, "nocephx_sign_messages,"); 685 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0) 686 seq_puts(m, "notcp_nodelay,"); 687 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL)) 688 seq_puts(m, "abort_on_full,"); 689 690 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT) 691 seq_printf(m, "mount_timeout=%d,", 692 jiffies_to_msecs(opt->mount_timeout) / 1000); 693 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT) 694 seq_printf(m, "osd_idle_ttl=%d,", 695 jiffies_to_msecs(opt->osd_idle_ttl) / 1000); 696 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT) 697 seq_printf(m, "osdkeepalivetimeout=%d,", 698 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000); 699 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT) 700 seq_printf(m, "osd_request_timeout=%d,", 701 jiffies_to_msecs(opt->osd_request_timeout) / 1000); 702 703 /* drop redundant comma */ 704 if (m->count != pos) 705 m->count--; 706 707 return 0; 708 } 709 EXPORT_SYMBOL(ceph_print_client_options); 710 711 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client) 712 { 713 return &client->msgr.inst.addr; 714 } 715 EXPORT_SYMBOL(ceph_client_addr); 716 717 u64 ceph_client_gid(struct ceph_client *client) 718 { 719 return client->monc.auth->global_id; 720 } 721 EXPORT_SYMBOL(ceph_client_gid); 722 723 /* 724 * create a fresh client instance 725 */ 726 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private) 727 { 728 struct ceph_client *client; 729 struct ceph_entity_addr *myaddr = NULL; 730 int err; 731 732 err = wait_for_random_bytes(); 733 if (err < 0) 734 return ERR_PTR(err); 735 736 client = kzalloc(sizeof(*client), GFP_KERNEL); 737 if (client == NULL) 738 return ERR_PTR(-ENOMEM); 739 740 client->private = private; 741 client->options = opt; 742 743 mutex_init(&client->mount_mutex); 744 init_waitqueue_head(&client->auth_wq); 745 client->auth_err = 0; 746 747 client->extra_mon_dispatch = NULL; 748 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT; 749 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT; 750 751 if (!ceph_test_opt(client, NOMSGSIGN)) 752 client->required_features |= CEPH_FEATURE_MSG_AUTH; 753 754 /* msgr */ 755 if (ceph_test_opt(client, MYIP)) 756 myaddr = &client->options->my_addr; 757 758 ceph_messenger_init(&client->msgr, myaddr); 759 760 /* subsystems */ 761 err = ceph_monc_init(&client->monc, client); 762 if (err < 0) 763 goto fail; 764 err = ceph_osdc_init(&client->osdc, client); 765 if (err < 0) 766 goto fail_monc; 767 768 return client; 769 770 fail_monc: 771 ceph_monc_stop(&client->monc); 772 fail: 773 ceph_messenger_fini(&client->msgr); 774 kfree(client); 775 return ERR_PTR(err); 776 } 777 EXPORT_SYMBOL(ceph_create_client); 778 779 void ceph_destroy_client(struct ceph_client *client) 780 { 781 dout("destroy_client %p\n", client); 782 783 atomic_set(&client->msgr.stopping, 1); 784 785 /* unmount */ 786 ceph_osdc_stop(&client->osdc); 787 ceph_monc_stop(&client->monc); 788 ceph_messenger_fini(&client->msgr); 789 790 ceph_debugfs_client_cleanup(client); 791 792 ceph_destroy_options(client->options); 793 794 kfree(client); 795 dout("destroy_client %p done\n", client); 796 } 797 EXPORT_SYMBOL(ceph_destroy_client); 798 799 void ceph_reset_client_addr(struct ceph_client *client) 800 { 801 ceph_messenger_reset_nonce(&client->msgr); 802 ceph_monc_reopen_session(&client->monc); 803 ceph_osdc_reopen_osds(&client->osdc); 804 } 805 EXPORT_SYMBOL(ceph_reset_client_addr); 806 807 /* 808 * true if we have the mon map (and have thus joined the cluster) 809 */ 810 static bool have_mon_and_osd_map(struct ceph_client *client) 811 { 812 return client->monc.monmap && client->monc.monmap->epoch && 813 client->osdc.osdmap && client->osdc.osdmap->epoch; 814 } 815 816 /* 817 * mount: join the ceph cluster, and open root directory. 818 */ 819 int __ceph_open_session(struct ceph_client *client, unsigned long started) 820 { 821 unsigned long timeout = client->options->mount_timeout; 822 long err; 823 824 /* open session, and wait for mon and osd maps */ 825 err = ceph_monc_open_session(&client->monc); 826 if (err < 0) 827 return err; 828 829 while (!have_mon_and_osd_map(client)) { 830 if (timeout && time_after_eq(jiffies, started + timeout)) 831 return -ETIMEDOUT; 832 833 /* wait */ 834 dout("mount waiting for mon_map\n"); 835 err = wait_event_interruptible_timeout(client->auth_wq, 836 have_mon_and_osd_map(client) || (client->auth_err < 0), 837 ceph_timeout_jiffies(timeout)); 838 if (err < 0) 839 return err; 840 if (client->auth_err < 0) 841 return client->auth_err; 842 } 843 844 pr_info("client%llu fsid %pU\n", ceph_client_gid(client), 845 &client->fsid); 846 ceph_debugfs_client_init(client); 847 848 return 0; 849 } 850 EXPORT_SYMBOL(__ceph_open_session); 851 852 int ceph_open_session(struct ceph_client *client) 853 { 854 int ret; 855 unsigned long started = jiffies; /* note the start time */ 856 857 dout("open_session start\n"); 858 mutex_lock(&client->mount_mutex); 859 860 ret = __ceph_open_session(client, started); 861 862 mutex_unlock(&client->mount_mutex); 863 return ret; 864 } 865 EXPORT_SYMBOL(ceph_open_session); 866 867 int ceph_wait_for_latest_osdmap(struct ceph_client *client, 868 unsigned long timeout) 869 { 870 u64 newest_epoch; 871 int ret; 872 873 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch); 874 if (ret) 875 return ret; 876 877 if (client->osdc.osdmap->epoch >= newest_epoch) 878 return 0; 879 880 ceph_osdc_maybe_request_map(&client->osdc); 881 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout); 882 } 883 EXPORT_SYMBOL(ceph_wait_for_latest_osdmap); 884 885 static int __init init_ceph_lib(void) 886 { 887 int ret = 0; 888 889 ceph_debugfs_init(); 890 891 ret = ceph_crypto_init(); 892 if (ret < 0) 893 goto out_debugfs; 894 895 ret = ceph_msgr_init(); 896 if (ret < 0) 897 goto out_crypto; 898 899 ret = ceph_osdc_setup(); 900 if (ret < 0) 901 goto out_msgr; 902 903 pr_info("loaded (mon/osd proto %d/%d)\n", 904 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL); 905 906 return 0; 907 908 out_msgr: 909 ceph_msgr_exit(); 910 out_crypto: 911 ceph_crypto_shutdown(); 912 out_debugfs: 913 ceph_debugfs_cleanup(); 914 return ret; 915 } 916 917 static void __exit exit_ceph_lib(void) 918 { 919 dout("exit_ceph_lib\n"); 920 WARN_ON(!ceph_strings_empty()); 921 922 ceph_osdc_cleanup(); 923 ceph_msgr_exit(); 924 ceph_crypto_shutdown(); 925 ceph_debugfs_cleanup(); 926 } 927 928 module_init(init_ceph_lib); 929 module_exit(exit_ceph_lib); 930 931 MODULE_AUTHOR("Sage Weil <sage@newdream.net>"); 932 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>"); 933 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>"); 934 MODULE_DESCRIPTION("Ceph core library"); 935 MODULE_LICENSE("GPL"); 936