net/ceph/ceph_common.c

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