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/parser.h>
13#include <linux/sched.h>
14#include <linux/seq_file.h>
15#include <linux/slab.h>
16#include <linux/statfs.h>
17#include <linux/string.h>
18#include <linux/vmalloc.h>
19#include <linux/nsproxy.h>
20#include <net/net_namespace.h>
21
22
23#include <linux/ceph/ceph_features.h>
24#include <linux/ceph/libceph.h>
25#include <linux/ceph/debugfs.h>
26#include <linux/ceph/decode.h>
27#include <linux/ceph/mon_client.h>
28#include <linux/ceph/auth.h>
29#include "crypto.h"
30
31
32
33
34
35
36
37
38
39
40
41
42
43bool libceph_compatible(void *data)
44{
45 return true;
46}
47EXPORT_SYMBOL(libceph_compatible);
48
49
50
51
52const char *ceph_file_part(const char *s, int len)
53{
54 const char *e = s + len;
55
56 while (e != s && *(e-1) != '/')
57 e--;
58 return e;
59}
60EXPORT_SYMBOL(ceph_file_part);
61
62const char *ceph_msg_type_name(int type)
63{
64 switch (type) {
65 case CEPH_MSG_SHUTDOWN: return "shutdown";
66 case CEPH_MSG_PING: return "ping";
67 case CEPH_MSG_AUTH: return "auth";
68 case CEPH_MSG_AUTH_REPLY: return "auth_reply";
69 case CEPH_MSG_MON_MAP: return "mon_map";
70 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
71 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
72 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
73 case CEPH_MSG_STATFS: return "statfs";
74 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
75 case CEPH_MSG_MON_GET_VERSION: return "mon_get_version";
76 case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
77 case CEPH_MSG_MDS_MAP: return "mds_map";
78 case CEPH_MSG_CLIENT_SESSION: return "client_session";
79 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
80 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
81 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
82 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
83 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
84 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
85 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
86 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
87 case CEPH_MSG_OSD_MAP: return "osd_map";
88 case CEPH_MSG_OSD_OP: return "osd_op";
89 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
90 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
91 default: return "unknown";
92 }
93}
94EXPORT_SYMBOL(ceph_msg_type_name);
95
96
97
98
99int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
100{
101 if (client->have_fsid) {
102 if (ceph_fsid_compare(&client->fsid, fsid)) {
103 pr_err("bad fsid, had %pU got %pU",
104 &client->fsid, fsid);
105 return -1;
106 }
107 } else {
108 memcpy(&client->fsid, fsid, sizeof(*fsid));
109 }
110 return 0;
111}
112EXPORT_SYMBOL(ceph_check_fsid);
113
114static int strcmp_null(const char *s1, const char *s2)
115{
116 if (!s1 && !s2)
117 return 0;
118 if (s1 && !s2)
119 return -1;
120 if (!s1 && s2)
121 return 1;
122 return strcmp(s1, s2);
123}
124
125int ceph_compare_options(struct ceph_options *new_opt,
126 struct ceph_client *client)
127{
128 struct ceph_options *opt1 = new_opt;
129 struct ceph_options *opt2 = client->options;
130 int ofs = offsetof(struct ceph_options, mon_addr);
131 int i;
132 int ret;
133
134 ret = memcmp(opt1, opt2, ofs);
135 if (ret)
136 return ret;
137
138 ret = strcmp_null(opt1->name, opt2->name);
139 if (ret)
140 return ret;
141
142 if (opt1->key && !opt2->key)
143 return -1;
144 if (!opt1->key && opt2->key)
145 return 1;
146 if (opt1->key && opt2->key) {
147 if (opt1->key->type != opt2->key->type)
148 return -1;
149 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
150 return -1;
151 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
152 return -1;
153 if (opt1->key->len != opt2->key->len)
154 return -1;
155 if (opt1->key->key && !opt2->key->key)
156 return -1;
157 if (!opt1->key->key && opt2->key->key)
158 return 1;
159 if (opt1->key->key && opt2->key->key) {
160 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
161 if (ret)
162 return ret;
163 }
164 }
165
166
167 for (i = 0; i < opt1->num_mon; i++) {
168 if (ceph_monmap_contains(client->monc.monmap,
169 &opt1->mon_addr[i]))
170 return 0;
171 }
172 return -1;
173}
174EXPORT_SYMBOL(ceph_compare_options);
175
176void *ceph_kvmalloc(size_t size, gfp_t flags)
177{
178 if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
179 void *ptr = kmalloc(size, flags | __GFP_NOWARN);
180 if (ptr)
181 return ptr;
182 }
183
184 return __vmalloc(size, flags | __GFP_HIGHMEM, PAGE_KERNEL);
185}
186
187
188static int parse_fsid(const char *str, struct ceph_fsid *fsid)
189{
190 int i = 0;
191 char tmp[3];
192 int err = -EINVAL;
193 int d;
194
195 dout("parse_fsid '%s'\n", str);
196 tmp[2] = 0;
197 while (*str && i < 16) {
198 if (ispunct(*str)) {
199 str++;
200 continue;
201 }
202 if (!isxdigit(str[0]) || !isxdigit(str[1]))
203 break;
204 tmp[0] = str[0];
205 tmp[1] = str[1];
206 if (sscanf(tmp, "%x", &d) < 1)
207 break;
208 fsid->fsid[i] = d & 0xff;
209 i++;
210 str += 2;
211 }
212
213 if (i == 16)
214 err = 0;
215 dout("parse_fsid ret %d got fsid %pU", err, fsid);
216 return err;
217}
218
219
220
221
222enum {
223 Opt_osdtimeout,
224 Opt_osdkeepalivetimeout,
225 Opt_mount_timeout,
226 Opt_osd_idle_ttl,
227 Opt_last_int,
228
229 Opt_fsid,
230 Opt_name,
231 Opt_secret,
232 Opt_key,
233 Opt_ip,
234 Opt_last_string,
235
236 Opt_share,
237 Opt_noshare,
238 Opt_crc,
239 Opt_nocrc,
240 Opt_cephx_require_signatures,
241 Opt_nocephx_require_signatures,
242};
243
244static match_table_t opt_tokens = {
245 {Opt_osdtimeout, "osdtimeout=%d"},
246 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
247 {Opt_mount_timeout, "mount_timeout=%d"},
248 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
249
250 {Opt_fsid, "fsid=%s"},
251 {Opt_name, "name=%s"},
252 {Opt_secret, "secret=%s"},
253 {Opt_key, "key=%s"},
254 {Opt_ip, "ip=%s"},
255
256 {Opt_share, "share"},
257 {Opt_noshare, "noshare"},
258 {Opt_crc, "crc"},
259 {Opt_nocrc, "nocrc"},
260 {Opt_cephx_require_signatures, "cephx_require_signatures"},
261 {Opt_nocephx_require_signatures, "nocephx_require_signatures"},
262 {-1, NULL}
263};
264
265void ceph_destroy_options(struct ceph_options *opt)
266{
267 dout("destroy_options %p\n", opt);
268 kfree(opt->name);
269 if (opt->key) {
270 ceph_crypto_key_destroy(opt->key);
271 kfree(opt->key);
272 }
273 kfree(opt->mon_addr);
274 kfree(opt);
275}
276EXPORT_SYMBOL(ceph_destroy_options);
277
278
279static int get_secret(struct ceph_crypto_key *dst, const char *name) {
280 struct key *ukey;
281 int key_err;
282 int err = 0;
283 struct ceph_crypto_key *ckey;
284
285 ukey = request_key(&key_type_ceph, name, NULL);
286 if (!ukey || IS_ERR(ukey)) {
287
288
289 key_err = PTR_ERR(ukey);
290 switch (key_err) {
291 case -ENOKEY:
292 pr_warn("ceph: Mount failed due to key not found: %s\n",
293 name);
294 break;
295 case -EKEYEXPIRED:
296 pr_warn("ceph: Mount failed due to expired key: %s\n",
297 name);
298 break;
299 case -EKEYREVOKED:
300 pr_warn("ceph: Mount failed due to revoked key: %s\n",
301 name);
302 break;
303 default:
304 pr_warn("ceph: Mount failed due to unknown key error %d: %s\n",
305 key_err, name);
306 }
307 err = -EPERM;
308 goto out;
309 }
310
311 ckey = ukey->payload.data;
312 err = ceph_crypto_key_clone(dst, ckey);
313 if (err)
314 goto out_key;
315
316
317out_key:
318 key_put(ukey);
319out:
320 return err;
321}
322
323struct ceph_options *
324ceph_parse_options(char *options, const char *dev_name,
325 const char *dev_name_end,
326 int (*parse_extra_token)(char *c, void *private),
327 void *private)
328{
329 struct ceph_options *opt;
330 const char *c;
331 int err = -ENOMEM;
332 substring_t argstr[MAX_OPT_ARGS];
333
334 if (current->nsproxy->net_ns != &init_net)
335 return ERR_PTR(-EINVAL);
336
337 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
338 if (!opt)
339 return ERR_PTR(-ENOMEM);
340 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
341 GFP_KERNEL);
342 if (!opt->mon_addr)
343 goto out;
344
345 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
346 dev_name);
347
348
349 opt->flags = CEPH_OPT_DEFAULT;
350 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
351 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
352 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
353
354
355
356 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
357 CEPH_MAX_MON, &opt->num_mon);
358 if (err < 0)
359 goto out;
360
361
362 while ((c = strsep(&options, ",")) != NULL) {
363 int token, intval, ret;
364 if (!*c)
365 continue;
366 err = -EINVAL;
367 token = match_token((char *)c, opt_tokens, argstr);
368 if (token < 0 && parse_extra_token) {
369
370 err = parse_extra_token((char *)c, private);
371 if (err < 0) {
372 pr_err("bad option at '%s'\n", c);
373 goto out;
374 }
375 continue;
376 }
377 if (token < Opt_last_int) {
378 ret = match_int(&argstr[0], &intval);
379 if (ret < 0) {
380 pr_err("bad mount option arg (not int) "
381 "at '%s'\n", c);
382 continue;
383 }
384 dout("got int token %d val %d\n", token, intval);
385 } else if (token > Opt_last_int && token < Opt_last_string) {
386 dout("got string token %d val %s\n", token,
387 argstr[0].from);
388 } else {
389 dout("got token %d\n", token);
390 }
391 switch (token) {
392 case Opt_ip:
393 err = ceph_parse_ips(argstr[0].from,
394 argstr[0].to,
395 &opt->my_addr,
396 1, NULL);
397 if (err < 0)
398 goto out;
399 opt->flags |= CEPH_OPT_MYIP;
400 break;
401
402 case Opt_fsid:
403 err = parse_fsid(argstr[0].from, &opt->fsid);
404 if (err == 0)
405 opt->flags |= CEPH_OPT_FSID;
406 break;
407 case Opt_name:
408 opt->name = kstrndup(argstr[0].from,
409 argstr[0].to-argstr[0].from,
410 GFP_KERNEL);
411 break;
412 case Opt_secret:
413 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
414 if (!opt->key) {
415 err = -ENOMEM;
416 goto out;
417 }
418 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
419 if (err < 0)
420 goto out;
421 break;
422 case Opt_key:
423 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
424 if (!opt->key) {
425 err = -ENOMEM;
426 goto out;
427 }
428 err = get_secret(opt->key, argstr[0].from);
429 if (err < 0)
430 goto out;
431 break;
432
433
434 case Opt_osdtimeout:
435 pr_warn("ignoring deprecated osdtimeout option\n");
436 break;
437 case Opt_osdkeepalivetimeout:
438 opt->osd_keepalive_timeout = intval;
439 break;
440 case Opt_osd_idle_ttl:
441 opt->osd_idle_ttl = intval;
442 break;
443 case Opt_mount_timeout:
444 opt->mount_timeout = intval;
445 break;
446
447 case Opt_share:
448 opt->flags &= ~CEPH_OPT_NOSHARE;
449 break;
450 case Opt_noshare:
451 opt->flags |= CEPH_OPT_NOSHARE;
452 break;
453
454 case Opt_crc:
455 opt->flags &= ~CEPH_OPT_NOCRC;
456 break;
457 case Opt_nocrc:
458 opt->flags |= CEPH_OPT_NOCRC;
459 break;
460 case Opt_cephx_require_signatures:
461 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
462 break;
463 case Opt_nocephx_require_signatures:
464 opt->flags |= CEPH_OPT_NOMSGAUTH;
465 break;
466
467 default:
468 BUG_ON(token);
469 }
470 }
471
472
473 return opt;
474
475out:
476 ceph_destroy_options(opt);
477 return ERR_PTR(err);
478}
479EXPORT_SYMBOL(ceph_parse_options);
480
481u64 ceph_client_id(struct ceph_client *client)
482{
483 return client->monc.auth->global_id;
484}
485EXPORT_SYMBOL(ceph_client_id);
486
487
488
489
490struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
491 u64 supported_features,
492 u64 required_features)
493{
494 struct ceph_client *client;
495 struct ceph_entity_addr *myaddr = NULL;
496 int err = -ENOMEM;
497
498 client = kzalloc(sizeof(*client), GFP_KERNEL);
499 if (client == NULL)
500 return ERR_PTR(-ENOMEM);
501
502 client->private = private;
503 client->options = opt;
504
505 mutex_init(&client->mount_mutex);
506 init_waitqueue_head(&client->auth_wq);
507 client->auth_err = 0;
508
509 if (!ceph_test_opt(client, NOMSGAUTH))
510 required_features |= CEPH_FEATURE_MSG_AUTH;
511
512 client->extra_mon_dispatch = NULL;
513 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
514 supported_features;
515 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
516 required_features;
517
518
519 if (ceph_test_opt(client, MYIP))
520 myaddr = &client->options->my_addr;
521 ceph_messenger_init(&client->msgr, myaddr,
522 client->supported_features,
523 client->required_features,
524 ceph_test_opt(client, NOCRC));
525
526
527 err = ceph_monc_init(&client->monc, client);
528 if (err < 0)
529 goto fail;
530 err = ceph_osdc_init(&client->osdc, client);
531 if (err < 0)
532 goto fail_monc;
533
534 return client;
535
536fail_monc:
537 ceph_monc_stop(&client->monc);
538fail:
539 kfree(client);
540 return ERR_PTR(err);
541}
542EXPORT_SYMBOL(ceph_create_client);
543
544void ceph_destroy_client(struct ceph_client *client)
545{
546 dout("destroy_client %p\n", client);
547
548 atomic_set(&client->msgr.stopping, 1);
549
550
551 ceph_osdc_stop(&client->osdc);
552
553 ceph_monc_stop(&client->monc);
554
555 ceph_debugfs_client_cleanup(client);
556
557 ceph_destroy_options(client->options);
558
559 kfree(client);
560 dout("destroy_client %p done\n", client);
561}
562EXPORT_SYMBOL(ceph_destroy_client);
563
564
565
566
567static int have_mon_and_osd_map(struct ceph_client *client)
568{
569 return client->monc.monmap && client->monc.monmap->epoch &&
570 client->osdc.osdmap && client->osdc.osdmap->epoch;
571}
572
573
574
575
576int __ceph_open_session(struct ceph_client *client, unsigned long started)
577{
578 int err;
579 unsigned long timeout = client->options->mount_timeout * HZ;
580
581
582 err = ceph_monc_open_session(&client->monc);
583 if (err < 0)
584 return err;
585
586 while (!have_mon_and_osd_map(client)) {
587 err = -EIO;
588 if (timeout && time_after_eq(jiffies, started + timeout))
589 return err;
590
591
592 dout("mount waiting for mon_map\n");
593 err = wait_event_interruptible_timeout(client->auth_wq,
594 have_mon_and_osd_map(client) || (client->auth_err < 0),
595 timeout);
596 if (err == -EINTR || err == -ERESTARTSYS)
597 return err;
598 if (client->auth_err < 0)
599 return client->auth_err;
600 }
601
602 return 0;
603}
604EXPORT_SYMBOL(__ceph_open_session);
605
606
607int ceph_open_session(struct ceph_client *client)
608{
609 int ret;
610 unsigned long started = jiffies;
611
612 dout("open_session start\n");
613 mutex_lock(&client->mount_mutex);
614
615 ret = __ceph_open_session(client, started);
616
617 mutex_unlock(&client->mount_mutex);
618 return ret;
619}
620EXPORT_SYMBOL(ceph_open_session);
621
622
623static int __init init_ceph_lib(void)
624{
625 int ret = 0;
626
627 ret = ceph_debugfs_init();
628 if (ret < 0)
629 goto out;
630
631 ret = ceph_crypto_init();
632 if (ret < 0)
633 goto out_debugfs;
634
635 ret = ceph_msgr_init();
636 if (ret < 0)
637 goto out_crypto;
638
639 ret = ceph_osdc_setup();
640 if (ret < 0)
641 goto out_msgr;
642
643 pr_info("loaded (mon/osd proto %d/%d)\n",
644 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
645
646 return 0;
647
648out_msgr:
649 ceph_msgr_exit();
650out_crypto:
651 ceph_crypto_shutdown();
652out_debugfs:
653 ceph_debugfs_cleanup();
654out:
655 return ret;
656}
657
658static void __exit exit_ceph_lib(void)
659{
660 dout("exit_ceph_lib\n");
661 ceph_osdc_cleanup();
662 ceph_msgr_exit();
663 ceph_crypto_shutdown();
664 ceph_debugfs_cleanup();
665}
666
667module_init(init_ceph_lib);
668module_exit(exit_ceph_lib);
669
670MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
671MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
672MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
673MODULE_DESCRIPTION("Ceph filesystem for Linux");
674MODULE_LICENSE("GPL");
675
