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
33
34
35
36
37
38
39
40
41
42bool libceph_compatible(void *data)
43{
44 return true;
45}
46EXPORT_SYMBOL(libceph_compatible);
47
48
49
50
51const 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}
59EXPORT_SYMBOL(ceph_file_part);
60
61const 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}
93EXPORT_SYMBOL(ceph_msg_type_name);
94
95
96
97
98int 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}
111EXPORT_SYMBOL(ceph_check_fsid);
112
113static 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
124int 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
135
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
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}
180EXPORT_SYMBOL(ceph_compare_options);
181
182void *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
194static 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
227
228enum {
229 Opt_osdtimeout,
230 Opt_osdkeepalivetimeout,
231 Opt_mount_timeout,
232 Opt_osd_idle_ttl,
233 Opt_last_int,
234
235 Opt_fsid,
236 Opt_name,
237 Opt_secret,
238 Opt_key,
239 Opt_ip,
240 Opt_last_string,
241
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
254static 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
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
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
279void 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}
290EXPORT_SYMBOL(ceph_destroy_options);
291
292
293static 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
302
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
330
331out_key:
332 key_put(ukey);
333out:
334 return err;
335}
336
337struct ceph_options *
338ceph_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
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 opt->monc_ping_timeout = CEPH_MONC_PING_TIMEOUT_DEFAULT;
365
366
367
368 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
369 CEPH_MAX_MON, &opt->num_mon);
370 if (err < 0)
371 goto out;
372
373
374 while ((c = strsep(&options, ",")) != NULL) {
375 int token, intval, ret;
376 if (!*c)
377 continue;
378 err = -EINVAL;
379 token = match_token((char *)c, opt_tokens, argstr);
380 if (token < 0 && parse_extra_token) {
381
382 err = parse_extra_token((char *)c, private);
383 if (err < 0) {
384 pr_err("bad option at '%s'\n", c);
385 goto out;
386 }
387 continue;
388 }
389 if (token < Opt_last_int) {
390 ret = match_int(&argstr[0], &intval);
391 if (ret < 0) {
392 pr_err("bad mount option arg (not int) "
393 "at '%s'\n", c);
394 continue;
395 }
396 dout("got int token %d val %d\n", token, intval);
397 } else if (token > Opt_last_int && token < Opt_last_string) {
398 dout("got string token %d val %s\n", token,
399 argstr[0].from);
400 } else {
401 dout("got token %d\n", token);
402 }
403 switch (token) {
404 case Opt_ip:
405 err = ceph_parse_ips(argstr[0].from,
406 argstr[0].to,
407 &opt->my_addr,
408 1, NULL);
409 if (err < 0)
410 goto out;
411 opt->flags |= CEPH_OPT_MYIP;
412 break;
413
414 case Opt_fsid:
415 err = parse_fsid(argstr[0].from, &opt->fsid);
416 if (err == 0)
417 opt->flags |= CEPH_OPT_FSID;
418 break;
419 case Opt_name:
420 opt->name = kstrndup(argstr[0].from,
421 argstr[0].to-argstr[0].from,
422 GFP_KERNEL);
423 break;
424 case Opt_secret:
425 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
426 if (!opt->key) {
427 err = -ENOMEM;
428 goto out;
429 }
430 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
431 if (err < 0)
432 goto out;
433 break;
434 case Opt_key:
435 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
436 if (!opt->key) {
437 err = -ENOMEM;
438 goto out;
439 }
440 err = get_secret(opt->key, argstr[0].from);
441 if (err < 0)
442 goto out;
443 break;
444
445
446 case Opt_osdtimeout:
447 pr_warn("ignoring deprecated osdtimeout option\n");
448 break;
449 case Opt_osdkeepalivetimeout:
450
451 if (intval < 1 || intval > INT_MAX / 1000) {
452 pr_err("osdkeepalive out of range\n");
453 err = -EINVAL;
454 goto out;
455 }
456 opt->osd_keepalive_timeout =
457 msecs_to_jiffies(intval * 1000);
458 break;
459 case Opt_osd_idle_ttl:
460
461 if (intval < 1 || intval > INT_MAX / 1000) {
462 pr_err("osd_idle_ttl out of range\n");
463 err = -EINVAL;
464 goto out;
465 }
466 opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
467 break;
468 case Opt_mount_timeout:
469
470 if (intval < 0 || intval > INT_MAX / 1000) {
471 pr_err("mount_timeout out of range\n");
472 err = -EINVAL;
473 goto out;
474 }
475 opt->mount_timeout = msecs_to_jiffies(intval * 1000);
476 break;
477
478 case Opt_share:
479 opt->flags &= ~CEPH_OPT_NOSHARE;
480 break;
481 case Opt_noshare:
482 opt->flags |= CEPH_OPT_NOSHARE;
483 break;
484
485 case Opt_crc:
486 opt->flags &= ~CEPH_OPT_NOCRC;
487 break;
488 case Opt_nocrc:
489 opt->flags |= CEPH_OPT_NOCRC;
490 break;
491
492 case Opt_cephx_require_signatures:
493 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
494 break;
495 case Opt_nocephx_require_signatures:
496 opt->flags |= CEPH_OPT_NOMSGAUTH;
497 break;
498 case Opt_cephx_sign_messages:
499 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
500 break;
501 case Opt_nocephx_sign_messages:
502 opt->flags |= CEPH_OPT_NOMSGSIGN;
503 break;
504
505 case Opt_tcp_nodelay:
506 opt->flags |= CEPH_OPT_TCP_NODELAY;
507 break;
508 case Opt_notcp_nodelay:
509 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
510 break;
511
512 default:
513 BUG_ON(token);
514 }
515 }
516
517
518 return opt;
519
520out:
521 ceph_destroy_options(opt);
522 return ERR_PTR(err);
523}
524EXPORT_SYMBOL(ceph_parse_options);
525
526int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
527{
528 struct ceph_options *opt = client->options;
529 size_t pos = m->count;
530
531 if (opt->name) {
532 seq_puts(m, "name=");
533 seq_escape(m, opt->name, ", \t\n\\");
534 seq_putc(m, ',');
535 }
536 if (opt->key)
537 seq_puts(m, "secret=<hidden>,");
538
539 if (opt->flags & CEPH_OPT_FSID)
540 seq_printf(m, "fsid=%pU,", &opt->fsid);
541 if (opt->flags & CEPH_OPT_NOSHARE)
542 seq_puts(m, "noshare,");
543 if (opt->flags & CEPH_OPT_NOCRC)
544 seq_puts(m, "nocrc,");
545 if (opt->flags & CEPH_OPT_NOMSGAUTH)
546 seq_puts(m, "nocephx_require_signatures,");
547 if (opt->flags & CEPH_OPT_NOMSGSIGN)
548 seq_puts(m, "nocephx_sign_messages,");
549 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
550 seq_puts(m, "notcp_nodelay,");
551
552 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
553 seq_printf(m, "mount_timeout=%d,",
554 jiffies_to_msecs(opt->mount_timeout) / 1000);
555 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
556 seq_printf(m, "osd_idle_ttl=%d,",
557 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
558 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
559 seq_printf(m, "osdkeepalivetimeout=%d,",
560 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
561
562
563 if (m->count != pos)
564 m->count--;
565
566 return 0;
567}
568EXPORT_SYMBOL(ceph_print_client_options);
569
570u64 ceph_client_id(struct ceph_client *client)
571{
572 return client->monc.auth->global_id;
573}
574EXPORT_SYMBOL(ceph_client_id);
575
576
577
578
579struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
580 u64 supported_features,
581 u64 required_features)
582{
583 struct ceph_client *client;
584 struct ceph_entity_addr *myaddr = NULL;
585 int err = -ENOMEM;
586
587 client = kzalloc(sizeof(*client), GFP_KERNEL);
588 if (client == NULL)
589 return ERR_PTR(-ENOMEM);
590
591 client->private = private;
592 client->options = opt;
593
594 mutex_init(&client->mount_mutex);
595 init_waitqueue_head(&client->auth_wq);
596 client->auth_err = 0;
597
598 if (!ceph_test_opt(client, NOMSGAUTH))
599 required_features |= CEPH_FEATURE_MSG_AUTH;
600
601 client->extra_mon_dispatch = NULL;
602 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
603 supported_features;
604 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
605 required_features;
606
607
608 if (ceph_test_opt(client, MYIP))
609 myaddr = &client->options->my_addr;
610
611 ceph_messenger_init(&client->msgr, myaddr);
612
613
614 err = ceph_monc_init(&client->monc, client);
615 if (err < 0)
616 goto fail;
617 err = ceph_osdc_init(&client->osdc, client);
618 if (err < 0)
619 goto fail_monc;
620
621 return client;
622
623fail_monc:
624 ceph_monc_stop(&client->monc);
625fail:
626 ceph_messenger_fini(&client->msgr);
627 kfree(client);
628 return ERR_PTR(err);
629}
630EXPORT_SYMBOL(ceph_create_client);
631
632void ceph_destroy_client(struct ceph_client *client)
633{
634 dout("destroy_client %p\n", client);
635
636 atomic_set(&client->msgr.stopping, 1);
637
638
639 ceph_osdc_stop(&client->osdc);
640 ceph_monc_stop(&client->monc);
641 ceph_messenger_fini(&client->msgr);
642
643 ceph_debugfs_client_cleanup(client);
644
645 ceph_destroy_options(client->options);
646
647 kfree(client);
648 dout("destroy_client %p done\n", client);
649}
650EXPORT_SYMBOL(ceph_destroy_client);
651
652
653
654
655static int have_mon_and_osd_map(struct ceph_client *client)
656{
657 return client->monc.monmap && client->monc.monmap->epoch &&
658 client->osdc.osdmap && client->osdc.osdmap->epoch;
659}
660
661
662
663
664int __ceph_open_session(struct ceph_client *client, unsigned long started)
665{
666 unsigned long timeout = client->options->mount_timeout;
667 long err;
668
669
670 err = ceph_monc_open_session(&client->monc);
671 if (err < 0)
672 return err;
673
674 while (!have_mon_and_osd_map(client)) {
675 if (timeout && time_after_eq(jiffies, started + timeout))
676 return -ETIMEDOUT;
677
678
679 dout("mount waiting for mon_map\n");
680 err = wait_event_interruptible_timeout(client->auth_wq,
681 have_mon_and_osd_map(client) || (client->auth_err < 0),
682 ceph_timeout_jiffies(timeout));
683 if (err < 0)
684 return err;
685 if (client->auth_err < 0)
686 return client->auth_err;
687 }
688
689 return 0;
690}
691EXPORT_SYMBOL(__ceph_open_session);
692
693
694int ceph_open_session(struct ceph_client *client)
695{
696 int ret;
697 unsigned long started = jiffies;
698
699 dout("open_session start\n");
700 mutex_lock(&client->mount_mutex);
701
702 ret = __ceph_open_session(client, started);
703
704 mutex_unlock(&client->mount_mutex);
705 return ret;
706}
707EXPORT_SYMBOL(ceph_open_session);
708
709
710static int __init init_ceph_lib(void)
711{
712 int ret = 0;
713
714 ret = ceph_debugfs_init();
715 if (ret < 0)
716 goto out;
717
718 ret = ceph_crypto_init();
719 if (ret < 0)
720 goto out_debugfs;
721
722 ret = ceph_msgr_init();
723 if (ret < 0)
724 goto out_crypto;
725
726 ret = ceph_osdc_setup();
727 if (ret < 0)
728 goto out_msgr;
729
730 pr_info("loaded (mon/osd proto %d/%d)\n",
731 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
732
733 return 0;
734
735out_msgr:
736 ceph_msgr_exit();
737out_crypto:
738 ceph_crypto_shutdown();
739out_debugfs:
740 ceph_debugfs_cleanup();
741out:
742 return ret;
743}
744
745static void __exit exit_ceph_lib(void)
746{
747 dout("exit_ceph_lib\n");
748 ceph_osdc_cleanup();
749 ceph_msgr_exit();
750 ceph_crypto_shutdown();
751 ceph_debugfs_cleanup();
752}
753
754module_init(init_ceph_lib);
755module_exit(exit_ceph_lib);
756
757MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
758MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
759MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
760MODULE_DESCRIPTION("Ceph core library");
761MODULE_LICENSE("GPL");
762
