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TOMOYO Linux Cross Reference
Linux/net/ceph/ceph_common.c

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

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