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