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_tcp_nodelay,
249 Opt_notcp_nodelay,
250};
251
252static match_table_t opt_tokens = {
253 {Opt_osdtimeout, "osdtimeout=%d"},
254 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
255 {Opt_mount_timeout, "mount_timeout=%d"},
256 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
257
258 {Opt_fsid, "fsid=%s"},
259 {Opt_name, "name=%s"},
260 {Opt_secret, "secret=%s"},
261 {Opt_key, "key=%s"},
262 {Opt_ip, "ip=%s"},
263
264 {Opt_share, "share"},
265 {Opt_noshare, "noshare"},
266 {Opt_crc, "crc"},
267 {Opt_nocrc, "nocrc"},
268 {Opt_cephx_require_signatures, "cephx_require_signatures"},
269 {Opt_nocephx_require_signatures, "nocephx_require_signatures"},
270 {Opt_tcp_nodelay, "tcp_nodelay"},
271 {Opt_notcp_nodelay, "notcp_nodelay"},
272 {-1, NULL}
273};
274
275void ceph_destroy_options(struct ceph_options *opt)
276{
277 dout("destroy_options %p\n", opt);
278 kfree(opt->name);
279 if (opt->key) {
280 ceph_crypto_key_destroy(opt->key);
281 kfree(opt->key);
282 }
283 kfree(opt->mon_addr);
284 kfree(opt);
285}
286EXPORT_SYMBOL(ceph_destroy_options);
287
288
289static int get_secret(struct ceph_crypto_key *dst, const char *name) {
290 struct key *ukey;
291 int key_err;
292 int err = 0;
293 struct ceph_crypto_key *ckey;
294
295 ukey = request_key(&key_type_ceph, name, NULL);
296 if (!ukey || IS_ERR(ukey)) {
297
298
299 key_err = PTR_ERR(ukey);
300 switch (key_err) {
301 case -ENOKEY:
302 pr_warn("ceph: Mount failed due to key not found: %s\n",
303 name);
304 break;
305 case -EKEYEXPIRED:
306 pr_warn("ceph: Mount failed due to expired key: %s\n",
307 name);
308 break;
309 case -EKEYREVOKED:
310 pr_warn("ceph: Mount failed due to revoked key: %s\n",
311 name);
312 break;
313 default:
314 pr_warn("ceph: Mount failed due to unknown key error %d: %s\n",
315 key_err, name);
316 }
317 err = -EPERM;
318 goto out;
319 }
320
321 ckey = ukey->payload.data;
322 err = ceph_crypto_key_clone(dst, ckey);
323 if (err)
324 goto out_key;
325
326
327out_key:
328 key_put(ukey);
329out:
330 return err;
331}
332
333struct ceph_options *
334ceph_parse_options(char *options, const char *dev_name,
335 const char *dev_name_end,
336 int (*parse_extra_token)(char *c, void *private),
337 void *private)
338{
339 struct ceph_options *opt;
340 const char *c;
341 int err = -ENOMEM;
342 substring_t argstr[MAX_OPT_ARGS];
343
344 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
345 if (!opt)
346 return ERR_PTR(-ENOMEM);
347 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
348 GFP_KERNEL);
349 if (!opt->mon_addr)
350 goto out;
351
352 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
353 dev_name);
354
355
356 opt->flags = CEPH_OPT_DEFAULT;
357 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
358 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
359 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
360 opt->monc_ping_timeout = CEPH_MONC_PING_TIMEOUT_DEFAULT;
361
362
363
364 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
365 CEPH_MAX_MON, &opt->num_mon);
366 if (err < 0)
367 goto out;
368
369
370 while ((c = strsep(&options, ",")) != NULL) {
371 int token, intval, ret;
372 if (!*c)
373 continue;
374 err = -EINVAL;
375 token = match_token((char *)c, opt_tokens, argstr);
376 if (token < 0 && parse_extra_token) {
377
378 err = parse_extra_token((char *)c, private);
379 if (err < 0) {
380 pr_err("bad option at '%s'\n", c);
381 goto out;
382 }
383 continue;
384 }
385 if (token < Opt_last_int) {
386 ret = match_int(&argstr[0], &intval);
387 if (ret < 0) {
388 pr_err("bad mount option arg (not int) "
389 "at '%s'\n", c);
390 continue;
391 }
392 dout("got int token %d val %d\n", token, intval);
393 } else if (token > Opt_last_int && token < Opt_last_string) {
394 dout("got string token %d val %s\n", token,
395 argstr[0].from);
396 } else {
397 dout("got token %d\n", token);
398 }
399 switch (token) {
400 case Opt_ip:
401 err = ceph_parse_ips(argstr[0].from,
402 argstr[0].to,
403 &opt->my_addr,
404 1, NULL);
405 if (err < 0)
406 goto out;
407 opt->flags |= CEPH_OPT_MYIP;
408 break;
409
410 case Opt_fsid:
411 err = parse_fsid(argstr[0].from, &opt->fsid);
412 if (err == 0)
413 opt->flags |= CEPH_OPT_FSID;
414 break;
415 case Opt_name:
416 opt->name = kstrndup(argstr[0].from,
417 argstr[0].to-argstr[0].from,
418 GFP_KERNEL);
419 break;
420 case Opt_secret:
421 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
422 if (!opt->key) {
423 err = -ENOMEM;
424 goto out;
425 }
426 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
427 if (err < 0)
428 goto out;
429 break;
430 case Opt_key:
431 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
432 if (!opt->key) {
433 err = -ENOMEM;
434 goto out;
435 }
436 err = get_secret(opt->key, argstr[0].from);
437 if (err < 0)
438 goto out;
439 break;
440
441
442 case Opt_osdtimeout:
443 pr_warn("ignoring deprecated osdtimeout option\n");
444 break;
445 case Opt_osdkeepalivetimeout:
446
447 if (intval < 1 || intval > INT_MAX / 1000) {
448 pr_err("osdkeepalive out of range\n");
449 err = -EINVAL;
450 goto out;
451 }
452 opt->osd_keepalive_timeout =
453 msecs_to_jiffies(intval * 1000);
454 break;
455 case Opt_osd_idle_ttl:
456
457 if (intval < 1 || intval > INT_MAX / 1000) {
458 pr_err("osd_idle_ttl out of range\n");
459 err = -EINVAL;
460 goto out;
461 }
462 opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
463 break;
464 case Opt_mount_timeout:
465
466 if (intval < 0 || intval > INT_MAX / 1000) {
467 pr_err("mount_timeout out of range\n");
468 err = -EINVAL;
469 goto out;
470 }
471 opt->mount_timeout = msecs_to_jiffies(intval * 1000);
472 break;
473
474 case Opt_share:
475 opt->flags &= ~CEPH_OPT_NOSHARE;
476 break;
477 case Opt_noshare:
478 opt->flags |= CEPH_OPT_NOSHARE;
479 break;
480
481 case Opt_crc:
482 opt->flags &= ~CEPH_OPT_NOCRC;
483 break;
484 case Opt_nocrc:
485 opt->flags |= CEPH_OPT_NOCRC;
486 break;
487
488 case Opt_cephx_require_signatures:
489 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
490 break;
491 case Opt_nocephx_require_signatures:
492 opt->flags |= CEPH_OPT_NOMSGAUTH;
493 break;
494
495 case Opt_tcp_nodelay:
496 opt->flags |= CEPH_OPT_TCP_NODELAY;
497 break;
498 case Opt_notcp_nodelay:
499 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
500 break;
501
502 default:
503 BUG_ON(token);
504 }
505 }
506
507
508 return opt;
509
510out:
511 ceph_destroy_options(opt);
512 return ERR_PTR(err);
513}
514EXPORT_SYMBOL(ceph_parse_options);
515
516int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
517{
518 struct ceph_options *opt = client->options;
519 size_t pos = m->count;
520
521 if (opt->name) {
522 seq_puts(m, "name=");
523 seq_escape(m, opt->name, ", \t\n\\");
524 seq_putc(m, ',');
525 }
526 if (opt->key)
527 seq_puts(m, "secret=<hidden>,");
528
529 if (opt->flags & CEPH_OPT_FSID)
530 seq_printf(m, "fsid=%pU,", &opt->fsid);
531 if (opt->flags & CEPH_OPT_NOSHARE)
532 seq_puts(m, "noshare,");
533 if (opt->flags & CEPH_OPT_NOCRC)
534 seq_puts(m, "nocrc,");
535 if (opt->flags & CEPH_OPT_NOMSGAUTH)
536 seq_puts(m, "nocephx_require_signatures,");
537 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
538 seq_puts(m, "notcp_nodelay,");
539
540 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
541 seq_printf(m, "mount_timeout=%d,",
542 jiffies_to_msecs(opt->mount_timeout) / 1000);
543 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
544 seq_printf(m, "osd_idle_ttl=%d,",
545 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
546 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
547 seq_printf(m, "osdkeepalivetimeout=%d,",
548 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
549
550
551 if (m->count != pos)
552 m->count--;
553
554 return 0;
555}
556EXPORT_SYMBOL(ceph_print_client_options);
557
558u64 ceph_client_id(struct ceph_client *client)
559{
560 return client->monc.auth->global_id;
561}
562EXPORT_SYMBOL(ceph_client_id);
563
564
565
566
567struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
568 u64 supported_features,
569 u64 required_features)
570{
571 struct ceph_client *client;
572 struct ceph_entity_addr *myaddr = NULL;
573 int err = -ENOMEM;
574
575 client = kzalloc(sizeof(*client), GFP_KERNEL);
576 if (client == NULL)
577 return ERR_PTR(-ENOMEM);
578
579 client->private = private;
580 client->options = opt;
581
582 mutex_init(&client->mount_mutex);
583 init_waitqueue_head(&client->auth_wq);
584 client->auth_err = 0;
585
586 if (!ceph_test_opt(client, NOMSGAUTH))
587 required_features |= CEPH_FEATURE_MSG_AUTH;
588
589 client->extra_mon_dispatch = NULL;
590 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
591 supported_features;
592 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
593 required_features;
594
595
596 if (ceph_test_opt(client, MYIP))
597 myaddr = &client->options->my_addr;
598
599 ceph_messenger_init(&client->msgr, myaddr,
600 client->supported_features,
601 client->required_features,
602 ceph_test_opt(client, NOCRC),
603 ceph_test_opt(client, TCP_NODELAY));
604
605
606 err = ceph_monc_init(&client->monc, client);
607 if (err < 0)
608 goto fail;
609 err = ceph_osdc_init(&client->osdc, client);
610 if (err < 0)
611 goto fail_monc;
612
613 return client;
614
615fail_monc:
616 ceph_monc_stop(&client->monc);
617fail:
618 ceph_messenger_fini(&client->msgr);
619 kfree(client);
620 return ERR_PTR(err);
621}
622EXPORT_SYMBOL(ceph_create_client);
623
624void ceph_destroy_client(struct ceph_client *client)
625{
626 dout("destroy_client %p\n", client);
627
628 atomic_set(&client->msgr.stopping, 1);
629
630
631 ceph_osdc_stop(&client->osdc);
632 ceph_monc_stop(&client->monc);
633 ceph_messenger_fini(&client->msgr);
634
635 ceph_debugfs_client_cleanup(client);
636
637 ceph_destroy_options(client->options);
638
639 kfree(client);
640 dout("destroy_client %p done\n", client);
641}
642EXPORT_SYMBOL(ceph_destroy_client);
643
644
645
646
647static int have_mon_and_osd_map(struct ceph_client *client)
648{
649 return client->monc.monmap && client->monc.monmap->epoch &&
650 client->osdc.osdmap && client->osdc.osdmap->epoch;
651}
652
653
654
655
656int __ceph_open_session(struct ceph_client *client, unsigned long started)
657{
658 unsigned long timeout = client->options->mount_timeout;
659 long err;
660
661
662 err = ceph_monc_open_session(&client->monc);
663 if (err < 0)
664 return err;
665
666 while (!have_mon_and_osd_map(client)) {
667 if (timeout && time_after_eq(jiffies, started + timeout))
668 return -ETIMEDOUT;
669
670
671 dout("mount waiting for mon_map\n");
672 err = wait_event_interruptible_timeout(client->auth_wq,
673 have_mon_and_osd_map(client) || (client->auth_err < 0),
674 ceph_timeout_jiffies(timeout));
675 if (err < 0)
676 return err;
677 if (client->auth_err < 0)
678 return client->auth_err;
679 }
680
681 return 0;
682}
683EXPORT_SYMBOL(__ceph_open_session);
684
685
686int ceph_open_session(struct ceph_client *client)
687{
688 int ret;
689 unsigned long started = jiffies;
690
691 dout("open_session start\n");
692 mutex_lock(&client->mount_mutex);
693
694 ret = __ceph_open_session(client, started);
695
696 mutex_unlock(&client->mount_mutex);
697 return ret;
698}
699EXPORT_SYMBOL(ceph_open_session);
700
701
702static int __init init_ceph_lib(void)
703{
704 int ret = 0;
705
706 ret = ceph_debugfs_init();
707 if (ret < 0)
708 goto out;
709
710 ret = ceph_crypto_init();
711 if (ret < 0)
712 goto out_debugfs;
713
714 ret = ceph_msgr_init();
715 if (ret < 0)
716 goto out_crypto;
717
718 ret = ceph_osdc_setup();
719 if (ret < 0)
720 goto out_msgr;
721
722 pr_info("loaded (mon/osd proto %d/%d)\n",
723 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
724
725 return 0;
726
727out_msgr:
728 ceph_msgr_exit();
729out_crypto:
730 ceph_crypto_shutdown();
731out_debugfs:
732 ceph_debugfs_cleanup();
733out:
734 return ret;
735}
736
737static void __exit exit_ceph_lib(void)
738{
739 dout("exit_ceph_lib\n");
740 ceph_osdc_cleanup();
741 ceph_msgr_exit();
742 ceph_crypto_shutdown();
743 ceph_debugfs_cleanup();
744}
745
746module_init(init_ceph_lib);
747module_exit(exit_ceph_lib);
748
749MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
750MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
751MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
752MODULE_DESCRIPTION("Ceph core library");
753MODULE_LICENSE("GPL");
754
