net/ceph/ceph_common.c

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