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 static int param_get_supported_features(char *buffer,
  49                                         const struct kernel_param *kp)
  50 {
  51         return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
  52 }
  53 static const struct kernel_param_ops param_ops_supported_features = {
  54         .get = param_get_supported_features,
  55 };
  56 module_param_cb(supported_features, &param_ops_supported_features, NULL,
  57                 S_IRUGO);
  58
  59 /*
  60  * find filename portion of a path (/foo/bar/baz -> baz)
  61  */
  62 const char *ceph_file_part(const char *s, int len)
  63 {
  64         const char *e = s + len;
  65
  66         while (e != s && *(e-1) != '/')
  67                 e--;
  68         return e;
  69 }
  70 EXPORT_SYMBOL(ceph_file_part);
  71
  72 const char *ceph_msg_type_name(int type)
  73 {
  74         switch (type) {
  75         case CEPH_MSG_SHUTDOWN: return "shutdown";
  76         case CEPH_MSG_PING: return "ping";
  77         case CEPH_MSG_AUTH: return "auth";
  78         case CEPH_MSG_AUTH_REPLY: return "auth_reply";
  79         case CEPH_MSG_MON_MAP: return "mon_map";
  80         case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
  81         case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
  82         case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
  83         case CEPH_MSG_STATFS: return "statfs";
  84         case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
  85         case CEPH_MSG_MON_GET_VERSION: return "mon_get_version";
  86         case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
  87         case CEPH_MSG_MDS_MAP: return "mds_map";
  88         case CEPH_MSG_CLIENT_SESSION: return "client_session";
  89         case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
  90         case CEPH_MSG_CLIENT_REQUEST: return "client_request";
  91         case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
  92         case CEPH_MSG_CLIENT_REPLY: return "client_reply";
  93         case CEPH_MSG_CLIENT_CAPS: return "client_caps";
  94         case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
  95         case CEPH_MSG_CLIENT_SNAP: return "client_snap";
  96         case CEPH_MSG_CLIENT_LEASE: return "client_lease";
  97         case CEPH_MSG_OSD_MAP: return "osd_map";
  98         case CEPH_MSG_OSD_OP: return "osd_op";
  99         case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
 100         case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
 101         default: return "unknown";
 102         }
 103 }
 104 EXPORT_SYMBOL(ceph_msg_type_name);
 105
 106 /*
 107  * Initially learn our fsid, or verify an fsid matches.
 108  */
 109 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
 110 {
 111         if (client->have_fsid) {
 112                 if (ceph_fsid_compare(&client->fsid, fsid)) {
 113                         pr_err("bad fsid, had %pU got %pU",
 114                                &client->fsid, fsid);
 115                         return -1;
 116                 }
 117         } else {
 118                 memcpy(&client->fsid, fsid, sizeof(*fsid));
 119         }
 120         return 0;
 121 }
 122 EXPORT_SYMBOL(ceph_check_fsid);
 123
 124 static int strcmp_null(const char *s1, const char *s2)
 125 {
 126         if (!s1 && !s2)
 127                 return 0;
 128         if (s1 && !s2)
 129                 return -1;
 130         if (!s1 && s2)
 131                 return 1;
 132         return strcmp(s1, s2);
 133 }
 134
 135 int ceph_compare_options(struct ceph_options *new_opt,
 136                          struct ceph_client *client)
 137 {
 138         struct ceph_options *opt1 = new_opt;
 139         struct ceph_options *opt2 = client->options;
 140         int ofs = offsetof(struct ceph_options, mon_addr);
 141         int i;
 142         int ret;
 143
 144         /*
 145          * Don't bother comparing options if network namespaces don't
 146          * match.
 147          */
 148         if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
 149                 return -1;
 150
 151         ret = memcmp(opt1, opt2, ofs);
 152         if (ret)
 153                 return ret;
 154
 155         ret = strcmp_null(opt1->name, opt2->name);
 156         if (ret)
 157                 return ret;
 158
 159         if (opt1->key && !opt2->key)
 160                 return -1;
 161         if (!opt1->key && opt2->key)
 162                 return 1;
 163         if (opt1->key && opt2->key) {
 164                 if (opt1->key->type != opt2->key->type)
 165                         return -1;
 166                 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
 167                         return -1;
 168                 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
 169                         return -1;
 170                 if (opt1->key->len != opt2->key->len)
 171                         return -1;
 172                 if (opt1->key->key && !opt2->key->key)
 173                         return -1;
 174                 if (!opt1->key->key && opt2->key->key)
 175                         return 1;
 176                 if (opt1->key->key && opt2->key->key) {
 177                         ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
 178                         if (ret)
 179                                 return ret;
 180                 }
 181         }
 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 void *ceph_kvmalloc(size_t size, gfp_t flags)
 194 {
 195         if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
 196                 void *ptr = kmalloc(size, flags | __GFP_NOWARN);
 197                 if (ptr)
 198                         return ptr;
 199         }
 200
 201         return __vmalloc(size, flags, PAGE_KERNEL);
 202 }
 203
 204
 205 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
 206 {
 207         int i = 0;
 208         char tmp[3];
 209         int err = -EINVAL;
 210         int d;
 211
 212         dout("parse_fsid '%s'\n", str);
 213         tmp[2] = 0;
 214         while (*str && i < 16) {
 215                 if (ispunct(*str)) {
 216                         str++;
 217                         continue;
 218                 }
 219                 if (!isxdigit(str[0]) || !isxdigit(str[1]))
 220                         break;
 221                 tmp[0] = str[0];
 222                 tmp[1] = str[1];
 223                 if (sscanf(tmp, "%x", &d) < 1)
 224                         break;
 225                 fsid->fsid[i] = d & 0xff;
 226                 i++;
 227                 str += 2;
 228         }
 229
 230         if (i == 16)
 231                 err = 0;
 232         dout("parse_fsid ret %d got fsid %pU", err, fsid);
 233         return err;
 234 }
 235
 236 /*
 237  * ceph options
 238  */
 239 enum {
 240         Opt_osdtimeout,
 241         Opt_osdkeepalivetimeout,
 242         Opt_mount_timeout,
 243         Opt_osd_idle_ttl,
 244         Opt_osd_request_timeout,
 245         Opt_last_int,
 246         /* int args above */
 247         Opt_fsid,
 248         Opt_name,
 249         Opt_secret,
 250         Opt_key,
 251         Opt_ip,
 252         Opt_last_string,
 253         /* string args above */
 254         Opt_share,
 255         Opt_noshare,
 256         Opt_crc,
 257         Opt_nocrc,
 258         Opt_cephx_require_signatures,
 259         Opt_nocephx_require_signatures,
 260         Opt_cephx_sign_messages,
 261         Opt_nocephx_sign_messages,
 262         Opt_tcp_nodelay,
 263         Opt_notcp_nodelay,
 264 };
 265
 266 static match_table_t opt_tokens = {
 267         {Opt_osdtimeout, "osdtimeout=%d"},
 268         {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
 269         {Opt_mount_timeout, "mount_timeout=%d"},
 270         {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
 271         {Opt_osd_request_timeout, "osd_request_timeout=%d"},
 272         /* int args above */
 273         {Opt_fsid, "fsid=%s"},
 274         {Opt_name, "name=%s"},
 275         {Opt_secret, "secret=%s"},
 276         {Opt_key, "key=%s"},
 277         {Opt_ip, "ip=%s"},
 278         /* string args above */
 279         {Opt_share, "share"},
 280         {Opt_noshare, "noshare"},
 281         {Opt_crc, "crc"},
 282         {Opt_nocrc, "nocrc"},
 283         {Opt_cephx_require_signatures, "cephx_require_signatures"},
 284         {Opt_nocephx_require_signatures, "nocephx_require_signatures"},
 285         {Opt_cephx_sign_messages, "cephx_sign_messages"},
 286         {Opt_nocephx_sign_messages, "nocephx_sign_messages"},
 287         {Opt_tcp_nodelay, "tcp_nodelay"},
 288         {Opt_notcp_nodelay, "notcp_nodelay"},
 289         {-1, NULL}
 290 };
 291
 292 void ceph_destroy_options(struct ceph_options *opt)
 293 {
 294         dout("destroy_options %p\n", opt);
 295         kfree(opt->name);
 296         if (opt->key) {
 297                 ceph_crypto_key_destroy(opt->key);
 298                 kfree(opt->key);
 299         }
 300         kfree(opt->mon_addr);
 301         kfree(opt);
 302 }
 303 EXPORT_SYMBOL(ceph_destroy_options);
 304
 305 /* get secret from key store */
 306 static int get_secret(struct ceph_crypto_key *dst, const char *name) {
 307         struct key *ukey;
 308         int key_err;
 309         int err = 0;
 310         struct ceph_crypto_key *ckey;
 311
 312         ukey = request_key(&key_type_ceph, name, NULL);
 313         if (!ukey || IS_ERR(ukey)) {
 314                 /* request_key errors don't map nicely to mount(2)
 315                    errors; don't even try, but still printk */
 316                 key_err = PTR_ERR(ukey);
 317                 switch (key_err) {
 318                 case -ENOKEY:
 319                         pr_warn("ceph: Mount failed due to key not found: %s\n",
 320                                 name);
 321                         break;
 322                 case -EKEYEXPIRED:
 323                         pr_warn("ceph: Mount failed due to expired key: %s\n",
 324                                 name);
 325                         break;
 326                 case -EKEYREVOKED:
 327                         pr_warn("ceph: Mount failed due to revoked key: %s\n",
 328                                 name);
 329                         break;
 330                 default:
 331                         pr_warn("ceph: Mount failed due to unknown key error %d: %s\n",
 332                                 key_err, name);
 333                 }
 334                 err = -EPERM;
 335                 goto out;
 336         }
 337
 338         ckey = ukey->payload.data[0];
 339         err = ceph_crypto_key_clone(dst, ckey);
 340         if (err)
 341                 goto out_key;
 342         /* pass through, err is 0 */
 343
 344 out_key:
 345         key_put(ukey);
 346 out:
 347         return err;
 348 }
 349
 350 struct ceph_options *
 351 ceph_parse_options(char *options, const char *dev_name,
 352                         const char *dev_name_end,
 353                         int (*parse_extra_token)(char *c, void *private),
 354                         void *private)
 355 {
 356         struct ceph_options *opt;
 357         const char *c;
 358         int err = -ENOMEM;
 359         substring_t argstr[MAX_OPT_ARGS];
 360
 361         opt = kzalloc(sizeof(*opt), GFP_KERNEL);
 362         if (!opt)
 363                 return ERR_PTR(-ENOMEM);
 364         opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
 365                                 GFP_KERNEL);
 366         if (!opt->mon_addr)
 367                 goto out;
 368
 369         dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
 370              dev_name);
 371
 372         /* start with defaults */
 373         opt->flags = CEPH_OPT_DEFAULT;
 374         opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
 375         opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
 376         opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
 377         opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
 378
 379         /* get mon ip(s) */
 380         /* ip1[:port1][,ip2[:port2]...] */
 381         err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
 382                              CEPH_MAX_MON, &opt->num_mon);
 383         if (err < 0)
 384                 goto out;
 385
 386         /* parse mount options */
 387         while ((c = strsep(&options, ",")) != NULL) {
 388                 int token, intval, ret;
 389                 if (!*c)
 390                         continue;
 391                 err = -EINVAL;
 392                 token = match_token((char *)c, opt_tokens, argstr);
 393                 if (token < 0 && parse_extra_token) {
 394                         /* extra? */
 395                         err = parse_extra_token((char *)c, private);
 396                         if (err < 0) {
 397                                 pr_err("bad option at '%s'\n", c);
 398                                 goto out;
 399                         }
 400                         continue;
 401                 }
 402                 if (token < Opt_last_int) {
 403                         ret = match_int(&argstr[0], &intval);
 404                         if (ret < 0) {
 405                                 pr_err("bad mount option arg (not int) "
 406                                        "at '%s'\n", c);
 407                                 continue;
 408                         }
 409                         dout("got int token %d val %d\n", token, intval);
 410                 } else if (token > Opt_last_int && token < Opt_last_string) {
 411                         dout("got string token %d val %s\n", token,
 412                              argstr[0].from);
 413                 } else {
 414                         dout("got token %d\n", token);
 415                 }
 416                 switch (token) {
 417                 case Opt_ip:
 418                         err = ceph_parse_ips(argstr[0].from,
 419                                              argstr[0].to,
 420                                              &opt->my_addr,
 421                                              1, NULL);
 422                         if (err < 0)
 423                                 goto out;
 424                         opt->flags |= CEPH_OPT_MYIP;
 425                         break;
 426
 427                 case Opt_fsid:
 428                         err = parse_fsid(argstr[0].from, &opt->fsid);
 429                         if (err == 0)
 430                                 opt->flags |= CEPH_OPT_FSID;
 431                         break;
 432                 case Opt_name:
 433                         opt->name = kstrndup(argstr[0].from,
 434                                               argstr[0].to-argstr[0].from,
 435                                               GFP_KERNEL);
 436                         break;
 437                 case Opt_secret:
 438                         opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
 439                         if (!opt->key) {
 440                                 err = -ENOMEM;
 441                                 goto out;
 442                         }
 443                         err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
 444                         if (err < 0)
 445                                 goto out;
 446                         break;
 447                 case Opt_key:
 448                         opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
 449                         if (!opt->key) {
 450                                 err = -ENOMEM;
 451                                 goto out;
 452                         }
 453                         err = get_secret(opt->key, argstr[0].from);
 454                         if (err < 0)
 455                                 goto out;
 456                         break;
 457
 458                         /* misc */
 459                 case Opt_osdtimeout:
 460                         pr_warn("ignoring deprecated osdtimeout option\n");
 461                         break;
 462                 case Opt_osdkeepalivetimeout:
 463                         /* 0 isn't well defined right now, reject it */
 464                         if (intval < 1 || intval > INT_MAX / 1000) {
 465                                 pr_err("osdkeepalive out of range\n");
 466                                 err = -EINVAL;
 467                                 goto out;
 468                         }
 469                         opt->osd_keepalive_timeout =
 470                                         msecs_to_jiffies(intval * 1000);
 471                         break;
 472                 case Opt_osd_idle_ttl:
 473                         /* 0 isn't well defined right now, reject it */
 474                         if (intval < 1 || intval > INT_MAX / 1000) {
 475                                 pr_err("osd_idle_ttl out of range\n");
 476                                 err = -EINVAL;
 477                                 goto out;
 478                         }
 479                         opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
 480                         break;
 481                 case Opt_mount_timeout:
 482                         /* 0 is "wait forever" (i.e. infinite timeout) */
 483                         if (intval < 0 || intval > INT_MAX / 1000) {
 484                                 pr_err("mount_timeout out of range\n");
 485                                 err = -EINVAL;
 486                                 goto out;
 487                         }
 488                         opt->mount_timeout = msecs_to_jiffies(intval * 1000);
 489                         break;
 490                 case Opt_osd_request_timeout:
 491                         /* 0 is "wait forever" (i.e. infinite timeout) */
 492                         if (intval < 0 || intval > INT_MAX / 1000) {
 493                                 pr_err("osd_request_timeout out of range\n");
 494                                 err = -EINVAL;
 495                                 goto out;
 496                         }
 497                         opt->osd_request_timeout = msecs_to_jiffies(intval * 1000);
 498                         break;
 499
 500                 case Opt_share:
 501                         opt->flags &= ~CEPH_OPT_NOSHARE;
 502                         break;
 503                 case Opt_noshare:
 504                         opt->flags |= CEPH_OPT_NOSHARE;
 505                         break;
 506
 507                 case Opt_crc:
 508                         opt->flags &= ~CEPH_OPT_NOCRC;
 509                         break;
 510                 case Opt_nocrc:
 511                         opt->flags |= CEPH_OPT_NOCRC;
 512                         break;
 513
 514                 case Opt_cephx_require_signatures:
 515                         opt->flags &= ~CEPH_OPT_NOMSGAUTH;
 516                         break;
 517                 case Opt_nocephx_require_signatures:
 518                         opt->flags |= CEPH_OPT_NOMSGAUTH;
 519                         break;
 520                 case Opt_cephx_sign_messages:
 521                         opt->flags &= ~CEPH_OPT_NOMSGSIGN;
 522                         break;
 523                 case Opt_nocephx_sign_messages:
 524                         opt->flags |= CEPH_OPT_NOMSGSIGN;
 525                         break;
 526
 527                 case Opt_tcp_nodelay:
 528                         opt->flags |= CEPH_OPT_TCP_NODELAY;
 529                         break;
 530                 case Opt_notcp_nodelay:
 531                         opt->flags &= ~CEPH_OPT_TCP_NODELAY;
 532                         break;
 533
 534                 default:
 535                         BUG_ON(token);
 536                 }
 537         }
 538
 539         /* success */
 540         return opt;
 541
 542 out:
 543         ceph_destroy_options(opt);
 544         return ERR_PTR(err);
 545 }
 546 EXPORT_SYMBOL(ceph_parse_options);
 547
 548 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
 549 {
 550         struct ceph_options *opt = client->options;
 551         size_t pos = m->count;
 552
 553         if (opt->name) {
 554                 seq_puts(m, "name=");
 555                 seq_escape(m, opt->name, ", \t\n\\");
 556                 seq_putc(m, ',');
 557         }
 558         if (opt->key)
 559                 seq_puts(m, "secret=<hidden>,");
 560
 561         if (opt->flags & CEPH_OPT_FSID)
 562                 seq_printf(m, "fsid=%pU,", &opt->fsid);
 563         if (opt->flags & CEPH_OPT_NOSHARE)
 564                 seq_puts(m, "noshare,");
 565         if (opt->flags & CEPH_OPT_NOCRC)
 566                 seq_puts(m, "nocrc,");
 567         if (opt->flags & CEPH_OPT_NOMSGAUTH)
 568                 seq_puts(m, "nocephx_require_signatures,");
 569         if (opt->flags & CEPH_OPT_NOMSGSIGN)
 570                 seq_puts(m, "nocephx_sign_messages,");
 571         if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
 572                 seq_puts(m, "notcp_nodelay,");
 573
 574         if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
 575                 seq_printf(m, "mount_timeout=%d,",
 576                            jiffies_to_msecs(opt->mount_timeout) / 1000);
 577         if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
 578                 seq_printf(m, "osd_idle_ttl=%d,",
 579                            jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
 580         if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
 581                 seq_printf(m, "osdkeepalivetimeout=%d,",
 582                     jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
 583         if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
 584                 seq_printf(m, "osd_request_timeout=%d,",
 585                            jiffies_to_msecs(opt->osd_request_timeout) / 1000);
 586
 587         /* drop redundant comma */
 588         if (m->count != pos)
 589                 m->count--;
 590
 591         return 0;
 592 }
 593 EXPORT_SYMBOL(ceph_print_client_options);
 594
 595 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
 596 {
 597         return &client->msgr.inst.addr;
 598 }
 599 EXPORT_SYMBOL(ceph_client_addr);
 600
 601 u64 ceph_client_gid(struct ceph_client *client)
 602 {
 603         return client->monc.auth->global_id;
 604 }
 605 EXPORT_SYMBOL(ceph_client_gid);
 606
 607 /*
 608  * create a fresh client instance
 609  */
 610 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
 611 {
 612         struct ceph_client *client;
 613         struct ceph_entity_addr *myaddr = NULL;
 614         int err = -ENOMEM;
 615
 616         client = kzalloc(sizeof(*client), GFP_KERNEL);
 617         if (client == NULL)
 618                 return ERR_PTR(-ENOMEM);
 619
 620         client->private = private;
 621         client->options = opt;
 622
 623         mutex_init(&client->mount_mutex);
 624         init_waitqueue_head(&client->auth_wq);
 625         client->auth_err = 0;
 626
 627         client->extra_mon_dispatch = NULL;
 628         client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
 629         client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
 630
 631         if (!ceph_test_opt(client, NOMSGAUTH))
 632                 client->required_features |= CEPH_FEATURE_MSG_AUTH;
 633
 634         /* msgr */
 635         if (ceph_test_opt(client, MYIP))
 636                 myaddr = &client->options->my_addr;
 637
 638         ceph_messenger_init(&client->msgr, myaddr);
 639
 640         /* subsystems */
 641         err = ceph_monc_init(&client->monc, client);
 642         if (err < 0)
 643                 goto fail;
 644         err = ceph_osdc_init(&client->osdc, client);
 645         if (err < 0)
 646                 goto fail_monc;
 647
 648         return client;
 649
 650 fail_monc:
 651         ceph_monc_stop(&client->monc);
 652 fail:
 653         ceph_messenger_fini(&client->msgr);
 654         kfree(client);
 655         return ERR_PTR(err);
 656 }
 657 EXPORT_SYMBOL(ceph_create_client);
 658
 659 void ceph_destroy_client(struct ceph_client *client)
 660 {
 661         dout("destroy_client %p\n", client);
 662
 663         atomic_set(&client->msgr.stopping, 1);
 664
 665         /* unmount */
 666         ceph_osdc_stop(&client->osdc);
 667         ceph_monc_stop(&client->monc);
 668         ceph_messenger_fini(&client->msgr);
 669
 670         ceph_debugfs_client_cleanup(client);
 671
 672         ceph_destroy_options(client->options);
 673
 674         kfree(client);
 675         dout("destroy_client %p done\n", client);
 676 }
 677 EXPORT_SYMBOL(ceph_destroy_client);
 678
 679 /*
 680  * true if we have the mon map (and have thus joined the cluster)
 681  */
 682 static bool have_mon_and_osd_map(struct ceph_client *client)
 683 {
 684         return client->monc.monmap && client->monc.monmap->epoch &&
 685                client->osdc.osdmap && client->osdc.osdmap->epoch;
 686 }
 687
 688 /*
 689  * mount: join the ceph cluster, and open root directory.
 690  */
 691 int __ceph_open_session(struct ceph_client *client, unsigned long started)
 692 {
 693         unsigned long timeout = client->options->mount_timeout;
 694         long err;
 695
 696         /* open session, and wait for mon and osd maps */
 697         err = ceph_monc_open_session(&client->monc);
 698         if (err < 0)
 699                 return err;
 700
 701         while (!have_mon_and_osd_map(client)) {
 702                 if (timeout && time_after_eq(jiffies, started + timeout))
 703                         return -ETIMEDOUT;
 704
 705                 /* wait */
 706                 dout("mount waiting for mon_map\n");
 707                 err = wait_event_interruptible_timeout(client->auth_wq,
 708                         have_mon_and_osd_map(client) || (client->auth_err < 0),
 709                         ceph_timeout_jiffies(timeout));
 710                 if (err < 0)
 711                         return err;
 712                 if (client->auth_err < 0)
 713                         return client->auth_err;
 714         }
 715
 716         pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
 717                 &client->fsid);
 718         ceph_debugfs_client_init(client);
 719
 720         return 0;
 721 }
 722 EXPORT_SYMBOL(__ceph_open_session);
 723
 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
 741 static int __init init_ceph_lib(void)
 742 {
 743         int ret = 0;
 744
 745         ret = ceph_debugfs_init();
 746         if (ret < 0)
 747                 goto out;
 748
 749         ret = ceph_crypto_init();
 750         if (ret < 0)
 751                 goto out_debugfs;
 752
 753         ret = ceph_msgr_init();
 754         if (ret < 0)
 755                 goto out_crypto;
 756
 757         ret = ceph_osdc_setup();
 758         if (ret < 0)
 759                 goto out_msgr;
 760
 761         pr_info("loaded (mon/osd proto %d/%d)\n",
 762                 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
 763
 764         return 0;
 765
 766 out_msgr:
 767         ceph_msgr_exit();
 768 out_crypto:
 769         ceph_crypto_shutdown();
 770 out_debugfs:
 771         ceph_debugfs_cleanup();
 772 out:
 773         return ret;
 774 }
 775
 776 static void __exit exit_ceph_lib(void)
 777 {
 778         dout("exit_ceph_lib\n");
 779         WARN_ON(!ceph_strings_empty());
 780
 781         ceph_osdc_cleanup();
 782         ceph_msgr_exit();
 783         ceph_crypto_shutdown();
 784         ceph_debugfs_cleanup();
 785 }
 786
 787 module_init(init_ceph_lib);
 788 module_exit(exit_ceph_lib);
 789
 790 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
 791 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
 792 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
 793 MODULE_DESCRIPTION("Ceph core library");
 794 MODULE_LICENSE("GPL");