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 */
libceph_compatible(void * data)42 bool libceph_compatible(void *data)
43 {
44 return true;
45 }
46 EXPORT_SYMBOL(libceph_compatible);
47
param_get_supported_features(char * buffer,const struct kernel_param * kp)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, ¶m_ops_supported_features, NULL,
57 0444);
58
ceph_msg_type_name(int type)59 const char *ceph_msg_type_name(int type)
60 {
61 switch (type) {
62 case CEPH_MSG_SHUTDOWN: return "shutdown";
63 case CEPH_MSG_PING: return "ping";
64 case CEPH_MSG_AUTH: return "auth";
65 case CEPH_MSG_AUTH_REPLY: return "auth_reply";
66 case CEPH_MSG_MON_MAP: return "mon_map";
67 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
68 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
69 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
70 case CEPH_MSG_STATFS: return "statfs";
71 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
72 case CEPH_MSG_MON_GET_VERSION: return "mon_get_version";
73 case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
74 case CEPH_MSG_MDS_MAP: return "mds_map";
75 case CEPH_MSG_FS_MAP_USER: return "fs_map_user";
76 case CEPH_MSG_CLIENT_SESSION: return "client_session";
77 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
78 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
79 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
80 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
81 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
82 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
83 case CEPH_MSG_CLIENT_QUOTA: return "client_quota";
84 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
85 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
86 case CEPH_MSG_POOLOP_REPLY: return "poolop_reply";
87 case CEPH_MSG_POOLOP: return "poolop";
88 case CEPH_MSG_MON_COMMAND: return "mon_command";
89 case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack";
90 case CEPH_MSG_OSD_MAP: return "osd_map";
91 case CEPH_MSG_OSD_OP: return "osd_op";
92 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
93 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
94 case CEPH_MSG_OSD_BACKOFF: return "osd_backoff";
95 default: return "unknown";
96 }
97 }
98 EXPORT_SYMBOL(ceph_msg_type_name);
99
100 /*
101 * Initially learn our fsid, or verify an fsid matches.
102 */
ceph_check_fsid(struct ceph_client * client,struct ceph_fsid * fsid)103 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
104 {
105 if (client->have_fsid) {
106 if (ceph_fsid_compare(&client->fsid, fsid)) {
107 pr_err("bad fsid, had %pU got %pU",
108 &client->fsid, fsid);
109 return -1;
110 }
111 } else {
112 memcpy(&client->fsid, fsid, sizeof(*fsid));
113 }
114 return 0;
115 }
116 EXPORT_SYMBOL(ceph_check_fsid);
117
strcmp_null(const char * s1,const char * s2)118 static int strcmp_null(const char *s1, const char *s2)
119 {
120 if (!s1 && !s2)
121 return 0;
122 if (s1 && !s2)
123 return -1;
124 if (!s1 && s2)
125 return 1;
126 return strcmp(s1, s2);
127 }
128
ceph_compare_options(struct ceph_options * new_opt,struct ceph_client * client)129 int ceph_compare_options(struct ceph_options *new_opt,
130 struct ceph_client *client)
131 {
132 struct ceph_options *opt1 = new_opt;
133 struct ceph_options *opt2 = client->options;
134 int ofs = offsetof(struct ceph_options, mon_addr);
135 int i;
136 int ret;
137
138 /*
139 * Don't bother comparing options if network namespaces don't
140 * match.
141 */
142 if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
143 return -1;
144
145 ret = memcmp(opt1, opt2, ofs);
146 if (ret)
147 return ret;
148
149 ret = strcmp_null(opt1->name, opt2->name);
150 if (ret)
151 return ret;
152
153 if (opt1->key && !opt2->key)
154 return -1;
155 if (!opt1->key && opt2->key)
156 return 1;
157 if (opt1->key && opt2->key) {
158 if (opt1->key->type != opt2->key->type)
159 return -1;
160 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
161 return -1;
162 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
163 return -1;
164 if (opt1->key->len != opt2->key->len)
165 return -1;
166 if (opt1->key->key && !opt2->key->key)
167 return -1;
168 if (!opt1->key->key && opt2->key->key)
169 return 1;
170 if (opt1->key->key && opt2->key->key) {
171 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
172 if (ret)
173 return ret;
174 }
175 }
176
177 /* any matching mon ip implies a match */
178 for (i = 0; i < opt1->num_mon; i++) {
179 if (ceph_monmap_contains(client->monc.monmap,
180 &opt1->mon_addr[i]))
181 return 0;
182 }
183 return -1;
184 }
185 EXPORT_SYMBOL(ceph_compare_options);
186
ceph_kvmalloc(size_t size,gfp_t flags)187 void *ceph_kvmalloc(size_t size, gfp_t flags)
188 {
189 if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
190 void *ptr = kmalloc(size, flags | __GFP_NOWARN);
191 if (ptr)
192 return ptr;
193 }
194
195 return __vmalloc(size, flags, PAGE_KERNEL);
196 }
197
198
parse_fsid(const char * str,struct ceph_fsid * fsid)199 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
200 {
201 int i = 0;
202 char tmp[3];
203 int err = -EINVAL;
204 int d;
205
206 dout("parse_fsid '%s'\n", str);
207 tmp[2] = 0;
208 while (*str && i < 16) {
209 if (ispunct(*str)) {
210 str++;
211 continue;
212 }
213 if (!isxdigit(str[0]) || !isxdigit(str[1]))
214 break;
215 tmp[0] = str[0];
216 tmp[1] = str[1];
217 if (sscanf(tmp, "%x", &d) < 1)
218 break;
219 fsid->fsid[i] = d & 0xff;
220 i++;
221 str += 2;
222 }
223
224 if (i == 16)
225 err = 0;
226 dout("parse_fsid ret %d got fsid %pU\n", err, fsid);
227 return err;
228 }
229
230 /*
231 * ceph options
232 */
233 enum {
234 Opt_osdtimeout,
235 Opt_osdkeepalivetimeout,
236 Opt_mount_timeout,
237 Opt_osd_idle_ttl,
238 Opt_osd_request_timeout,
239 Opt_last_int,
240 /* int args above */
241 Opt_fsid,
242 Opt_name,
243 Opt_secret,
244 Opt_key,
245 Opt_ip,
246 Opt_last_string,
247 /* string args above */
248 Opt_share,
249 Opt_noshare,
250 Opt_crc,
251 Opt_nocrc,
252 Opt_cephx_require_signatures,
253 Opt_nocephx_require_signatures,
254 Opt_cephx_sign_messages,
255 Opt_nocephx_sign_messages,
256 Opt_tcp_nodelay,
257 Opt_notcp_nodelay,
258 };
259
260 static match_table_t opt_tokens = {
261 {Opt_osdtimeout, "osdtimeout=%d"},
262 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
263 {Opt_mount_timeout, "mount_timeout=%d"},
264 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
265 {Opt_osd_request_timeout, "osd_request_timeout=%d"},
266 /* int args above */
267 {Opt_fsid, "fsid=%s"},
268 {Opt_name, "name=%s"},
269 {Opt_secret, "secret=%s"},
270 {Opt_key, "key=%s"},
271 {Opt_ip, "ip=%s"},
272 /* string args above */
273 {Opt_share, "share"},
274 {Opt_noshare, "noshare"},
275 {Opt_crc, "crc"},
276 {Opt_nocrc, "nocrc"},
277 {Opt_cephx_require_signatures, "cephx_require_signatures"},
278 {Opt_nocephx_require_signatures, "nocephx_require_signatures"},
279 {Opt_cephx_sign_messages, "cephx_sign_messages"},
280 {Opt_nocephx_sign_messages, "nocephx_sign_messages"},
281 {Opt_tcp_nodelay, "tcp_nodelay"},
282 {Opt_notcp_nodelay, "notcp_nodelay"},
283 {-1, NULL}
284 };
285
ceph_destroy_options(struct ceph_options * opt)286 void ceph_destroy_options(struct ceph_options *opt)
287 {
288 dout("destroy_options %p\n", opt);
289 kfree(opt->name);
290 if (opt->key) {
291 ceph_crypto_key_destroy(opt->key);
292 kfree(opt->key);
293 }
294 kfree(opt->mon_addr);
295 kfree(opt);
296 }
297 EXPORT_SYMBOL(ceph_destroy_options);
298
299 /* get secret from key store */
get_secret(struct ceph_crypto_key * dst,const char * name)300 static int get_secret(struct ceph_crypto_key *dst, const char *name) {
301 struct key *ukey;
302 int key_err;
303 int err = 0;
304 struct ceph_crypto_key *ckey;
305
306 ukey = request_key(&key_type_ceph, name, NULL);
307 if (IS_ERR(ukey)) {
308 /* request_key errors don't map nicely to mount(2)
309 errors; don't even try, but still printk */
310 key_err = PTR_ERR(ukey);
311 switch (key_err) {
312 case -ENOKEY:
313 pr_warn("ceph: Mount failed due to key not found: %s\n",
314 name);
315 break;
316 case -EKEYEXPIRED:
317 pr_warn("ceph: Mount failed due to expired key: %s\n",
318 name);
319 break;
320 case -EKEYREVOKED:
321 pr_warn("ceph: Mount failed due to revoked key: %s\n",
322 name);
323 break;
324 default:
325 pr_warn("ceph: Mount failed due to unknown key error %d: %s\n",
326 key_err, name);
327 }
328 err = -EPERM;
329 goto out;
330 }
331
332 ckey = ukey->payload.data[0];
333 err = ceph_crypto_key_clone(dst, ckey);
334 if (err)
335 goto out_key;
336 /* pass through, err is 0 */
337
338 out_key:
339 key_put(ukey);
340 out:
341 return err;
342 }
343
344 struct ceph_options *
ceph_parse_options(char * options,const char * dev_name,const char * dev_name_end,int (* parse_extra_token)(char * c,void * private),void * private)345 ceph_parse_options(char *options, const char *dev_name,
346 const char *dev_name_end,
347 int (*parse_extra_token)(char *c, void *private),
348 void *private)
349 {
350 struct ceph_options *opt;
351 const char *c;
352 int err = -ENOMEM;
353 substring_t argstr[MAX_OPT_ARGS];
354
355 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
356 if (!opt)
357 return ERR_PTR(-ENOMEM);
358 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
359 GFP_KERNEL);
360 if (!opt->mon_addr)
361 goto out;
362
363 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
364 dev_name);
365
366 /* start with defaults */
367 opt->flags = CEPH_OPT_DEFAULT;
368 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
369 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
370 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
371 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
372
373 /* get mon ip(s) */
374 /* ip1[:port1][,ip2[:port2]...] */
375 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
376 CEPH_MAX_MON, &opt->num_mon);
377 if (err < 0)
378 goto out;
379
380 /* parse mount options */
381 while ((c = strsep(&options, ",")) != NULL) {
382 int token, intval;
383 if (!*c)
384 continue;
385 err = -EINVAL;
386 token = match_token((char *)c, opt_tokens, argstr);
387 if (token < 0 && parse_extra_token) {
388 /* extra? */
389 err = parse_extra_token((char *)c, private);
390 if (err < 0) {
391 pr_err("bad option at '%s'\n", c);
392 goto out;
393 }
394 continue;
395 }
396 if (token < Opt_last_int) {
397 err = match_int(&argstr[0], &intval);
398 if (err < 0) {
399 pr_err("bad option arg (not int) at '%s'\n", c);
400 goto out;
401 }
402 dout("got int token %d val %d\n", token, intval);
403 } else if (token > Opt_last_int && token < Opt_last_string) {
404 dout("got string token %d val %s\n", token,
405 argstr[0].from);
406 } else {
407 dout("got token %d\n", token);
408 }
409 switch (token) {
410 case Opt_ip:
411 err = ceph_parse_ips(argstr[0].from,
412 argstr[0].to,
413 &opt->my_addr,
414 1, NULL);
415 if (err < 0)
416 goto out;
417 opt->flags |= CEPH_OPT_MYIP;
418 break;
419
420 case Opt_fsid:
421 err = parse_fsid(argstr[0].from, &opt->fsid);
422 if (err == 0)
423 opt->flags |= CEPH_OPT_FSID;
424 break;
425 case Opt_name:
426 kfree(opt->name);
427 opt->name = kstrndup(argstr[0].from,
428 argstr[0].to-argstr[0].from,
429 GFP_KERNEL);
430 if (!opt->name) {
431 err = -ENOMEM;
432 goto out;
433 }
434 break;
435 case Opt_secret:
436 ceph_crypto_key_destroy(opt->key);
437 kfree(opt->key);
438
439 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
440 if (!opt->key) {
441 err = -ENOMEM;
442 goto out;
443 }
444 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
445 if (err < 0)
446 goto out;
447 break;
448 case Opt_key:
449 ceph_crypto_key_destroy(opt->key);
450 kfree(opt->key);
451
452 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
453 if (!opt->key) {
454 err = -ENOMEM;
455 goto out;
456 }
457 err = get_secret(opt->key, argstr[0].from);
458 if (err < 0)
459 goto out;
460 break;
461
462 /* misc */
463 case Opt_osdtimeout:
464 pr_warn("ignoring deprecated osdtimeout option\n");
465 break;
466 case Opt_osdkeepalivetimeout:
467 /* 0 isn't well defined right now, reject it */
468 if (intval < 1 || intval > INT_MAX / 1000) {
469 pr_err("osdkeepalive out of range\n");
470 err = -EINVAL;
471 goto out;
472 }
473 opt->osd_keepalive_timeout =
474 msecs_to_jiffies(intval * 1000);
475 break;
476 case Opt_osd_idle_ttl:
477 /* 0 isn't well defined right now, reject it */
478 if (intval < 1 || intval > INT_MAX / 1000) {
479 pr_err("osd_idle_ttl out of range\n");
480 err = -EINVAL;
481 goto out;
482 }
483 opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
484 break;
485 case Opt_mount_timeout:
486 /* 0 is "wait forever" (i.e. infinite timeout) */
487 if (intval < 0 || intval > INT_MAX / 1000) {
488 pr_err("mount_timeout out of range\n");
489 err = -EINVAL;
490 goto out;
491 }
492 opt->mount_timeout = msecs_to_jiffies(intval * 1000);
493 break;
494 case Opt_osd_request_timeout:
495 /* 0 is "wait forever" (i.e. infinite timeout) */
496 if (intval < 0 || intval > INT_MAX / 1000) {
497 pr_err("osd_request_timeout out of range\n");
498 err = -EINVAL;
499 goto out;
500 }
501 opt->osd_request_timeout = msecs_to_jiffies(intval * 1000);
502 break;
503
504 case Opt_share:
505 opt->flags &= ~CEPH_OPT_NOSHARE;
506 break;
507 case Opt_noshare:
508 opt->flags |= CEPH_OPT_NOSHARE;
509 break;
510
511 case Opt_crc:
512 opt->flags &= ~CEPH_OPT_NOCRC;
513 break;
514 case Opt_nocrc:
515 opt->flags |= CEPH_OPT_NOCRC;
516 break;
517
518 case Opt_cephx_require_signatures:
519 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
520 break;
521 case Opt_nocephx_require_signatures:
522 opt->flags |= CEPH_OPT_NOMSGAUTH;
523 break;
524 case Opt_cephx_sign_messages:
525 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
526 break;
527 case Opt_nocephx_sign_messages:
528 opt->flags |= CEPH_OPT_NOMSGSIGN;
529 break;
530
531 case Opt_tcp_nodelay:
532 opt->flags |= CEPH_OPT_TCP_NODELAY;
533 break;
534 case Opt_notcp_nodelay:
535 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
536 break;
537
538 default:
539 BUG_ON(token);
540 }
541 }
542
543 /* success */
544 return opt;
545
546 out:
547 ceph_destroy_options(opt);
548 return ERR_PTR(err);
549 }
550 EXPORT_SYMBOL(ceph_parse_options);
551
ceph_print_client_options(struct seq_file * m,struct ceph_client * client)552 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
553 {
554 struct ceph_options *opt = client->options;
555 size_t pos = m->count;
556
557 if (opt->name) {
558 seq_puts(m, "name=");
559 seq_escape(m, opt->name, ", \t\n\\");
560 seq_putc(m, ',');
561 }
562 if (opt->key)
563 seq_puts(m, "secret=<hidden>,");
564
565 if (opt->flags & CEPH_OPT_FSID)
566 seq_printf(m, "fsid=%pU,", &opt->fsid);
567 if (opt->flags & CEPH_OPT_NOSHARE)
568 seq_puts(m, "noshare,");
569 if (opt->flags & CEPH_OPT_NOCRC)
570 seq_puts(m, "nocrc,");
571 if (opt->flags & CEPH_OPT_NOMSGAUTH)
572 seq_puts(m, "nocephx_require_signatures,");
573 if (opt->flags & CEPH_OPT_NOMSGSIGN)
574 seq_puts(m, "nocephx_sign_messages,");
575 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
576 seq_puts(m, "notcp_nodelay,");
577
578 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
579 seq_printf(m, "mount_timeout=%d,",
580 jiffies_to_msecs(opt->mount_timeout) / 1000);
581 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
582 seq_printf(m, "osd_idle_ttl=%d,",
583 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
584 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
585 seq_printf(m, "osdkeepalivetimeout=%d,",
586 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
587 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
588 seq_printf(m, "osd_request_timeout=%d,",
589 jiffies_to_msecs(opt->osd_request_timeout) / 1000);
590
591 /* drop redundant comma */
592 if (m->count != pos)
593 m->count--;
594
595 return 0;
596 }
597 EXPORT_SYMBOL(ceph_print_client_options);
598
ceph_client_addr(struct ceph_client * client)599 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
600 {
601 return &client->msgr.inst.addr;
602 }
603 EXPORT_SYMBOL(ceph_client_addr);
604
ceph_client_gid(struct ceph_client * client)605 u64 ceph_client_gid(struct ceph_client *client)
606 {
607 return client->monc.auth->global_id;
608 }
609 EXPORT_SYMBOL(ceph_client_gid);
610
611 /*
612 * create a fresh client instance
613 */
ceph_create_client(struct ceph_options * opt,void * private)614 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
615 {
616 struct ceph_client *client;
617 struct ceph_entity_addr *myaddr = NULL;
618 int err;
619
620 err = wait_for_random_bytes();
621 if (err < 0)
622 return ERR_PTR(err);
623
624 client = kzalloc(sizeof(*client), GFP_KERNEL);
625 if (client == NULL)
626 return ERR_PTR(-ENOMEM);
627
628 client->private = private;
629 client->options = opt;
630
631 mutex_init(&client->mount_mutex);
632 init_waitqueue_head(&client->auth_wq);
633 client->auth_err = 0;
634
635 client->extra_mon_dispatch = NULL;
636 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
637 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
638
639 if (!ceph_test_opt(client, NOMSGAUTH))
640 client->required_features |= CEPH_FEATURE_MSG_AUTH;
641
642 /* msgr */
643 if (ceph_test_opt(client, MYIP))
644 myaddr = &client->options->my_addr;
645
646 ceph_messenger_init(&client->msgr, myaddr);
647
648 /* subsystems */
649 err = ceph_monc_init(&client->monc, client);
650 if (err < 0)
651 goto fail;
652 err = ceph_osdc_init(&client->osdc, client);
653 if (err < 0)
654 goto fail_monc;
655
656 return client;
657
658 fail_monc:
659 ceph_monc_stop(&client->monc);
660 fail:
661 ceph_messenger_fini(&client->msgr);
662 kfree(client);
663 return ERR_PTR(err);
664 }
665 EXPORT_SYMBOL(ceph_create_client);
666
ceph_destroy_client(struct ceph_client * client)667 void ceph_destroy_client(struct ceph_client *client)
668 {
669 dout("destroy_client %p\n", client);
670
671 atomic_set(&client->msgr.stopping, 1);
672
673 /* unmount */
674 ceph_osdc_stop(&client->osdc);
675 ceph_monc_stop(&client->monc);
676 ceph_messenger_fini(&client->msgr);
677
678 ceph_debugfs_client_cleanup(client);
679
680 ceph_destroy_options(client->options);
681
682 kfree(client);
683 dout("destroy_client %p done\n", client);
684 }
685 EXPORT_SYMBOL(ceph_destroy_client);
686
687 /*
688 * true if we have the mon map (and have thus joined the cluster)
689 */
have_mon_and_osd_map(struct ceph_client * client)690 static bool have_mon_and_osd_map(struct ceph_client *client)
691 {
692 return client->monc.monmap && client->monc.monmap->epoch &&
693 client->osdc.osdmap && client->osdc.osdmap->epoch;
694 }
695
696 /*
697 * mount: join the ceph cluster, and open root directory.
698 */
__ceph_open_session(struct ceph_client * client,unsigned long started)699 int __ceph_open_session(struct ceph_client *client, unsigned long started)
700 {
701 unsigned long timeout = client->options->mount_timeout;
702 long err;
703
704 /* open session, and wait for mon and osd maps */
705 err = ceph_monc_open_session(&client->monc);
706 if (err < 0)
707 return err;
708
709 while (!have_mon_and_osd_map(client)) {
710 if (timeout && time_after_eq(jiffies, started + timeout))
711 return -ETIMEDOUT;
712
713 /* wait */
714 dout("mount waiting for mon_map\n");
715 err = wait_event_interruptible_timeout(client->auth_wq,
716 have_mon_and_osd_map(client) || (client->auth_err < 0),
717 ceph_timeout_jiffies(timeout));
718 if (err < 0)
719 return err;
720 if (client->auth_err < 0)
721 return client->auth_err;
722 }
723
724 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
725 &client->fsid);
726 ceph_debugfs_client_init(client);
727
728 return 0;
729 }
730 EXPORT_SYMBOL(__ceph_open_session);
731
732
ceph_open_session(struct ceph_client * client)733 int ceph_open_session(struct ceph_client *client)
734 {
735 int ret;
736 unsigned long started = jiffies; /* note the start time */
737
738 dout("open_session start\n");
739 mutex_lock(&client->mount_mutex);
740
741 ret = __ceph_open_session(client, started);
742
743 mutex_unlock(&client->mount_mutex);
744 return ret;
745 }
746 EXPORT_SYMBOL(ceph_open_session);
747
748
init_ceph_lib(void)749 static int __init init_ceph_lib(void)
750 {
751 int ret = 0;
752
753 ret = ceph_debugfs_init();
754 if (ret < 0)
755 goto out;
756
757 ret = ceph_crypto_init();
758 if (ret < 0)
759 goto out_debugfs;
760
761 ret = ceph_msgr_init();
762 if (ret < 0)
763 goto out_crypto;
764
765 ret = ceph_osdc_setup();
766 if (ret < 0)
767 goto out_msgr;
768
769 pr_info("loaded (mon/osd proto %d/%d)\n",
770 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
771
772 return 0;
773
774 out_msgr:
775 ceph_msgr_exit();
776 out_crypto:
777 ceph_crypto_shutdown();
778 out_debugfs:
779 ceph_debugfs_cleanup();
780 out:
781 return ret;
782 }
783
exit_ceph_lib(void)784 static void __exit exit_ceph_lib(void)
785 {
786 dout("exit_ceph_lib\n");
787 WARN_ON(!ceph_strings_empty());
788
789 ceph_osdc_cleanup();
790 ceph_msgr_exit();
791 ceph_crypto_shutdown();
792 ceph_debugfs_cleanup();
793 }
794
795 module_init(init_ceph_lib);
796 module_exit(exit_ceph_lib);
797
798 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
799 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
800 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
801 MODULE_DESCRIPTION("Ceph core library");
802 MODULE_LICENSE("GPL");
803
