Loading...
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 */
42bool libceph_compatible(void *data)
43{
44 return true;
45}
46EXPORT_SYMBOL(libceph_compatible);
47
48/*
49 * find filename portion of a path (/foo/bar/baz -> baz)
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 * Initially learn our fsid, or verify an fsid matches.
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 * Don't bother comparing options if network namespaces don't
135 * match.
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 /* any matching mon ip implies a match */
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 * ceph options
227 */
228enum {
229 Opt_osdtimeout,
230 Opt_osdkeepalivetimeout,
231 Opt_mount_timeout,
232 Opt_osd_idle_ttl,
233 Opt_last_int,
234 /* int args above */
235 Opt_fsid,
236 Opt_name,
237 Opt_secret,
238 Opt_key,
239 Opt_ip,
240 Opt_last_string,
241 /* string args above */
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 /* int args above */
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 /* string args above */
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/* get secret from key store */
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 /* request_key errors don't map nicely to mount(2)
302 errors; don't even try, but still printk */
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 /* pass through, err is 0 */
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 /* start with defaults */
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
365 /* get mon ip(s) */
366 /* ip1[:port1][,ip2[:port2]...] */
367 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
368 CEPH_MAX_MON, &opt->num_mon);
369 if (err < 0)
370 goto out;
371
372 /* parse mount options */
373 while ((c = strsep(&options, ",")) != NULL) {
374 int token, intval, ret;
375 if (!*c)
376 continue;
377 err = -EINVAL;
378 token = match_token((char *)c, opt_tokens, argstr);
379 if (token < 0 && parse_extra_token) {
380 /* extra? */
381 err = parse_extra_token((char *)c, private);
382 if (err < 0) {
383 pr_err("bad option at '%s'\n", c);
384 goto out;
385 }
386 continue;
387 }
388 if (token < Opt_last_int) {
389 ret = match_int(&argstr[0], &intval);
390 if (ret < 0) {
391 pr_err("bad mount option arg (not int) "
392 "at '%s'\n", c);
393 continue;
394 }
395 dout("got int token %d val %d\n", token, intval);
396 } else if (token > Opt_last_int && token < Opt_last_string) {
397 dout("got string token %d val %s\n", token,
398 argstr[0].from);
399 } else {
400 dout("got token %d\n", token);
401 }
402 switch (token) {
403 case Opt_ip:
404 err = ceph_parse_ips(argstr[0].from,
405 argstr[0].to,
406 &opt->my_addr,
407 1, NULL);
408 if (err < 0)
409 goto out;
410 opt->flags |= CEPH_OPT_MYIP;
411 break;
412
413 case Opt_fsid:
414 err = parse_fsid(argstr[0].from, &opt->fsid);
415 if (err == 0)
416 opt->flags |= CEPH_OPT_FSID;
417 break;
418 case Opt_name:
419 opt->name = kstrndup(argstr[0].from,
420 argstr[0].to-argstr[0].from,
421 GFP_KERNEL);
422 break;
423 case Opt_secret:
424 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
425 if (!opt->key) {
426 err = -ENOMEM;
427 goto out;
428 }
429 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
430 if (err < 0)
431 goto out;
432 break;
433 case Opt_key:
434 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
435 if (!opt->key) {
436 err = -ENOMEM;
437 goto out;
438 }
439 err = get_secret(opt->key, argstr[0].from);
440 if (err < 0)
441 goto out;
442 break;
443
444 /* misc */
445 case Opt_osdtimeout:
446 pr_warn("ignoring deprecated osdtimeout option\n");
447 break;
448 case Opt_osdkeepalivetimeout:
449 /* 0 isn't well defined right now, reject it */
450 if (intval < 1 || intval > INT_MAX / 1000) {
451 pr_err("osdkeepalive out of range\n");
452 err = -EINVAL;
453 goto out;
454 }
455 opt->osd_keepalive_timeout =
456 msecs_to_jiffies(intval * 1000);
457 break;
458 case Opt_osd_idle_ttl:
459 /* 0 isn't well defined right now, reject it */
460 if (intval < 1 || intval > INT_MAX / 1000) {
461 pr_err("osd_idle_ttl out of range\n");
462 err = -EINVAL;
463 goto out;
464 }
465 opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
466 break;
467 case Opt_mount_timeout:
468 /* 0 is "wait forever" (i.e. infinite timeout) */
469 if (intval < 0 || intval > INT_MAX / 1000) {
470 pr_err("mount_timeout out of range\n");
471 err = -EINVAL;
472 goto out;
473 }
474 opt->mount_timeout = msecs_to_jiffies(intval * 1000);
475 break;
476
477 case Opt_share:
478 opt->flags &= ~CEPH_OPT_NOSHARE;
479 break;
480 case Opt_noshare:
481 opt->flags |= CEPH_OPT_NOSHARE;
482 break;
483
484 case Opt_crc:
485 opt->flags &= ~CEPH_OPT_NOCRC;
486 break;
487 case Opt_nocrc:
488 opt->flags |= CEPH_OPT_NOCRC;
489 break;
490
491 case Opt_cephx_require_signatures:
492 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
493 break;
494 case Opt_nocephx_require_signatures:
495 opt->flags |= CEPH_OPT_NOMSGAUTH;
496 break;
497 case Opt_cephx_sign_messages:
498 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
499 break;
500 case Opt_nocephx_sign_messages:
501 opt->flags |= CEPH_OPT_NOMSGSIGN;
502 break;
503
504 case Opt_tcp_nodelay:
505 opt->flags |= CEPH_OPT_TCP_NODELAY;
506 break;
507 case Opt_notcp_nodelay:
508 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
509 break;
510
511 default:
512 BUG_ON(token);
513 }
514 }
515
516 /* success */
517 return opt;
518
519out:
520 ceph_destroy_options(opt);
521 return ERR_PTR(err);
522}
523EXPORT_SYMBOL(ceph_parse_options);
524
525int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
526{
527 struct ceph_options *opt = client->options;
528 size_t pos = m->count;
529
530 if (opt->name) {
531 seq_puts(m, "name=");
532 seq_escape(m, opt->name, ", \t\n\\");
533 seq_putc(m, ',');
534 }
535 if (opt->key)
536 seq_puts(m, "secret=<hidden>,");
537
538 if (opt->flags & CEPH_OPT_FSID)
539 seq_printf(m, "fsid=%pU,", &opt->fsid);
540 if (opt->flags & CEPH_OPT_NOSHARE)
541 seq_puts(m, "noshare,");
542 if (opt->flags & CEPH_OPT_NOCRC)
543 seq_puts(m, "nocrc,");
544 if (opt->flags & CEPH_OPT_NOMSGAUTH)
545 seq_puts(m, "nocephx_require_signatures,");
546 if (opt->flags & CEPH_OPT_NOMSGSIGN)
547 seq_puts(m, "nocephx_sign_messages,");
548 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
549 seq_puts(m, "notcp_nodelay,");
550
551 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
552 seq_printf(m, "mount_timeout=%d,",
553 jiffies_to_msecs(opt->mount_timeout) / 1000);
554 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
555 seq_printf(m, "osd_idle_ttl=%d,",
556 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
557 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
558 seq_printf(m, "osdkeepalivetimeout=%d,",
559 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
560
561 /* drop redundant comma */
562 if (m->count != pos)
563 m->count--;
564
565 return 0;
566}
567EXPORT_SYMBOL(ceph_print_client_options);
568
569u64 ceph_client_id(struct ceph_client *client)
570{
571 return client->monc.auth->global_id;
572}
573EXPORT_SYMBOL(ceph_client_id);
574
575/*
576 * create a fresh client instance
577 */
578struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
579 u64 supported_features,
580 u64 required_features)
581{
582 struct ceph_client *client;
583 struct ceph_entity_addr *myaddr = NULL;
584 int err = -ENOMEM;
585
586 client = kzalloc(sizeof(*client), GFP_KERNEL);
587 if (client == NULL)
588 return ERR_PTR(-ENOMEM);
589
590 client->private = private;
591 client->options = opt;
592
593 mutex_init(&client->mount_mutex);
594 init_waitqueue_head(&client->auth_wq);
595 client->auth_err = 0;
596
597 if (!ceph_test_opt(client, NOMSGAUTH))
598 required_features |= CEPH_FEATURE_MSG_AUTH;
599
600 client->extra_mon_dispatch = NULL;
601 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
602 supported_features;
603 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
604 required_features;
605
606 /* msgr */
607 if (ceph_test_opt(client, MYIP))
608 myaddr = &client->options->my_addr;
609
610 ceph_messenger_init(&client->msgr, myaddr);
611
612 /* subsystems */
613 err = ceph_monc_init(&client->monc, client);
614 if (err < 0)
615 goto fail;
616 err = ceph_osdc_init(&client->osdc, client);
617 if (err < 0)
618 goto fail_monc;
619
620 return client;
621
622fail_monc:
623 ceph_monc_stop(&client->monc);
624fail:
625 ceph_messenger_fini(&client->msgr);
626 kfree(client);
627 return ERR_PTR(err);
628}
629EXPORT_SYMBOL(ceph_create_client);
630
631void ceph_destroy_client(struct ceph_client *client)
632{
633 dout("destroy_client %p\n", client);
634
635 atomic_set(&client->msgr.stopping, 1);
636
637 /* unmount */
638 ceph_osdc_stop(&client->osdc);
639 ceph_monc_stop(&client->monc);
640 ceph_messenger_fini(&client->msgr);
641
642 ceph_debugfs_client_cleanup(client);
643
644 ceph_destroy_options(client->options);
645
646 kfree(client);
647 dout("destroy_client %p done\n", client);
648}
649EXPORT_SYMBOL(ceph_destroy_client);
650
651/*
652 * true if we have the mon map (and have thus joined the cluster)
653 */
654static int have_mon_and_osd_map(struct ceph_client *client)
655{
656 return client->monc.monmap && client->monc.monmap->epoch &&
657 client->osdc.osdmap && client->osdc.osdmap->epoch;
658}
659
660/*
661 * mount: join the ceph cluster, and open root directory.
662 */
663int __ceph_open_session(struct ceph_client *client, unsigned long started)
664{
665 unsigned long timeout = client->options->mount_timeout;
666 long err;
667
668 /* open session, and wait for mon and osd maps */
669 err = ceph_monc_open_session(&client->monc);
670 if (err < 0)
671 return err;
672
673 while (!have_mon_and_osd_map(client)) {
674 if (timeout && time_after_eq(jiffies, started + timeout))
675 return -ETIMEDOUT;
676
677 /* wait */
678 dout("mount waiting for mon_map\n");
679 err = wait_event_interruptible_timeout(client->auth_wq,
680 have_mon_and_osd_map(client) || (client->auth_err < 0),
681 ceph_timeout_jiffies(timeout));
682 if (err < 0)
683 return err;
684 if (client->auth_err < 0)
685 return client->auth_err;
686 }
687
688 pr_info("client%llu fsid %pU\n", ceph_client_id(client), &client->fsid);
689 ceph_debugfs_client_init(client);
690
691 return 0;
692}
693EXPORT_SYMBOL(__ceph_open_session);
694
695
696int ceph_open_session(struct ceph_client *client)
697{
698 int ret;
699 unsigned long started = jiffies; /* note the start time */
700
701 dout("open_session start\n");
702 mutex_lock(&client->mount_mutex);
703
704 ret = __ceph_open_session(client, started);
705
706 mutex_unlock(&client->mount_mutex);
707 return ret;
708}
709EXPORT_SYMBOL(ceph_open_session);
710
711
712static int __init init_ceph_lib(void)
713{
714 int ret = 0;
715
716 ret = ceph_debugfs_init();
717 if (ret < 0)
718 goto out;
719
720 ret = ceph_crypto_init();
721 if (ret < 0)
722 goto out_debugfs;
723
724 ret = ceph_msgr_init();
725 if (ret < 0)
726 goto out_crypto;
727
728 ret = ceph_osdc_setup();
729 if (ret < 0)
730 goto out_msgr;
731
732 pr_info("loaded (mon/osd proto %d/%d)\n",
733 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
734
735 return 0;
736
737out_msgr:
738 ceph_msgr_exit();
739out_crypto:
740 ceph_crypto_shutdown();
741out_debugfs:
742 ceph_debugfs_cleanup();
743out:
744 return ret;
745}
746
747static void __exit exit_ceph_lib(void)
748{
749 dout("exit_ceph_lib\n");
750 ceph_osdc_cleanup();
751 ceph_msgr_exit();
752 ceph_crypto_shutdown();
753 ceph_debugfs_cleanup();
754}
755
756module_init(init_ceph_lib);
757module_exit(exit_ceph_lib);
758
759MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
760MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
761MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
762MODULE_DESCRIPTION("Ceph core library");
763MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2
3#include <linux/ceph/ceph_debug.h>
4#include <linux/backing-dev.h>
5#include <linux/ctype.h>
6#include <linux/fs.h>
7#include <linux/inet.h>
8#include <linux/in6.h>
9#include <linux/key.h>
10#include <keys/ceph-type.h>
11#include <linux/module.h>
12#include <linux/mount.h>
13#include <linux/nsproxy.h>
14#include <linux/fs_parser.h>
15#include <linux/sched.h>
16#include <linux/sched/mm.h>
17#include <linux/seq_file.h>
18#include <linux/slab.h>
19#include <linux/statfs.h>
20#include <linux/string.h>
21#include <linux/vmalloc.h>
22
23
24#include <linux/ceph/ceph_features.h>
25#include <linux/ceph/libceph.h>
26#include <linux/ceph/debugfs.h>
27#include <linux/ceph/decode.h>
28#include <linux/ceph/mon_client.h>
29#include <linux/ceph/auth.h>
30#include "crypto.h"
31
32
33/*
34 * Module compatibility interface. For now it doesn't do anything,
35 * but its existence signals a certain level of functionality.
36 *
37 * The data buffer is used to pass information both to and from
38 * libceph. The return value indicates whether libceph determines
39 * it is compatible with the caller (from another kernel module),
40 * given the provided data.
41 *
42 * The data pointer can be null.
43 */
44bool libceph_compatible(void *data)
45{
46 return true;
47}
48EXPORT_SYMBOL(libceph_compatible);
49
50static int param_get_supported_features(char *buffer,
51 const struct kernel_param *kp)
52{
53 return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
54}
55static const struct kernel_param_ops param_ops_supported_features = {
56 .get = param_get_supported_features,
57};
58module_param_cb(supported_features, ¶m_ops_supported_features, NULL,
59 0444);
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_FS_MAP_USER: return "fs_map_user";
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_QUOTA: return "client_quota";
86 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
87 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
88 case CEPH_MSG_POOLOP_REPLY: return "poolop_reply";
89 case CEPH_MSG_POOLOP: return "poolop";
90 case CEPH_MSG_MON_COMMAND: return "mon_command";
91 case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack";
92 case CEPH_MSG_OSD_MAP: return "osd_map";
93 case CEPH_MSG_OSD_OP: return "osd_op";
94 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
95 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
96 case CEPH_MSG_OSD_BACKOFF: return "osd_backoff";
97 default: return "unknown";
98 }
99}
100EXPORT_SYMBOL(ceph_msg_type_name);
101
102/*
103 * Initially learn our fsid, or verify an fsid matches.
104 */
105int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
106{
107 if (client->have_fsid) {
108 if (ceph_fsid_compare(&client->fsid, fsid)) {
109 pr_err("bad fsid, had %pU got %pU",
110 &client->fsid, fsid);
111 return -1;
112 }
113 } else {
114 memcpy(&client->fsid, fsid, sizeof(*fsid));
115 }
116 return 0;
117}
118EXPORT_SYMBOL(ceph_check_fsid);
119
120static int strcmp_null(const char *s1, const char *s2)
121{
122 if (!s1 && !s2)
123 return 0;
124 if (s1 && !s2)
125 return -1;
126 if (!s1 && s2)
127 return 1;
128 return strcmp(s1, s2);
129}
130
131int ceph_compare_options(struct ceph_options *new_opt,
132 struct ceph_client *client)
133{
134 struct ceph_options *opt1 = new_opt;
135 struct ceph_options *opt2 = client->options;
136 int ofs = offsetof(struct ceph_options, mon_addr);
137 int i;
138 int ret;
139
140 /*
141 * Don't bother comparing options if network namespaces don't
142 * match.
143 */
144 if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
145 return -1;
146
147 ret = memcmp(opt1, opt2, ofs);
148 if (ret)
149 return ret;
150
151 ret = strcmp_null(opt1->name, opt2->name);
152 if (ret)
153 return ret;
154
155 if (opt1->key && !opt2->key)
156 return -1;
157 if (!opt1->key && opt2->key)
158 return 1;
159 if (opt1->key && opt2->key) {
160 if (opt1->key->type != opt2->key->type)
161 return -1;
162 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
163 return -1;
164 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
165 return -1;
166 if (opt1->key->len != opt2->key->len)
167 return -1;
168 if (opt1->key->key && !opt2->key->key)
169 return -1;
170 if (!opt1->key->key && opt2->key->key)
171 return 1;
172 if (opt1->key->key && opt2->key->key) {
173 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
174 if (ret)
175 return ret;
176 }
177 }
178
179 ret = ceph_compare_crush_locs(&opt1->crush_locs, &opt2->crush_locs);
180 if (ret)
181 return ret;
182
183 /* any matching mon ip implies a match */
184 for (i = 0; i < opt1->num_mon; i++) {
185 if (ceph_monmap_contains(client->monc.monmap,
186 &opt1->mon_addr[i]))
187 return 0;
188 }
189 return -1;
190}
191EXPORT_SYMBOL(ceph_compare_options);
192
193int ceph_parse_fsid(const char *str, struct ceph_fsid *fsid)
194{
195 int i = 0;
196 char tmp[3];
197 int err = -EINVAL;
198 int d;
199
200 dout("%s '%s'\n", __func__, str);
201 tmp[2] = 0;
202 while (*str && i < 16) {
203 if (ispunct(*str)) {
204 str++;
205 continue;
206 }
207 if (!isxdigit(str[0]) || !isxdigit(str[1]))
208 break;
209 tmp[0] = str[0];
210 tmp[1] = str[1];
211 if (sscanf(tmp, "%x", &d) < 1)
212 break;
213 fsid->fsid[i] = d & 0xff;
214 i++;
215 str += 2;
216 }
217
218 if (i == 16)
219 err = 0;
220 dout("%s ret %d got fsid %pU\n", __func__, err, fsid);
221 return err;
222}
223EXPORT_SYMBOL(ceph_parse_fsid);
224
225/*
226 * ceph options
227 */
228enum {
229 Opt_osdkeepalivetimeout,
230 Opt_mount_timeout,
231 Opt_osd_idle_ttl,
232 Opt_osd_request_timeout,
233 /* int args above */
234 Opt_fsid,
235 Opt_name,
236 Opt_secret,
237 Opt_key,
238 Opt_ip,
239 Opt_crush_location,
240 Opt_read_from_replica,
241 Opt_ms_mode,
242 /* string args above */
243 Opt_share,
244 Opt_crc,
245 Opt_cephx_require_signatures,
246 Opt_cephx_sign_messages,
247 Opt_tcp_nodelay,
248 Opt_abort_on_full,
249 Opt_rxbounce,
250};
251
252enum {
253 Opt_read_from_replica_no,
254 Opt_read_from_replica_balance,
255 Opt_read_from_replica_localize,
256};
257
258static const struct constant_table ceph_param_read_from_replica[] = {
259 {"no", Opt_read_from_replica_no},
260 {"balance", Opt_read_from_replica_balance},
261 {"localize", Opt_read_from_replica_localize},
262 {}
263};
264
265enum ceph_ms_mode {
266 Opt_ms_mode_legacy,
267 Opt_ms_mode_crc,
268 Opt_ms_mode_secure,
269 Opt_ms_mode_prefer_crc,
270 Opt_ms_mode_prefer_secure
271};
272
273static const struct constant_table ceph_param_ms_mode[] = {
274 {"legacy", Opt_ms_mode_legacy},
275 {"crc", Opt_ms_mode_crc},
276 {"secure", Opt_ms_mode_secure},
277 {"prefer-crc", Opt_ms_mode_prefer_crc},
278 {"prefer-secure", Opt_ms_mode_prefer_secure},
279 {}
280};
281
282static const struct fs_parameter_spec ceph_parameters[] = {
283 fsparam_flag ("abort_on_full", Opt_abort_on_full),
284 __fsparam (NULL, "cephx_require_signatures", Opt_cephx_require_signatures,
285 fs_param_neg_with_no|fs_param_deprecated, NULL),
286 fsparam_flag_no ("cephx_sign_messages", Opt_cephx_sign_messages),
287 fsparam_flag_no ("crc", Opt_crc),
288 fsparam_string ("crush_location", Opt_crush_location),
289 fsparam_string ("fsid", Opt_fsid),
290 fsparam_string ("ip", Opt_ip),
291 fsparam_string ("key", Opt_key),
292 fsparam_u32 ("mount_timeout", Opt_mount_timeout),
293 fsparam_string ("name", Opt_name),
294 fsparam_u32 ("osd_idle_ttl", Opt_osd_idle_ttl),
295 fsparam_u32 ("osd_request_timeout", Opt_osd_request_timeout),
296 fsparam_u32 ("osdkeepalive", Opt_osdkeepalivetimeout),
297 fsparam_enum ("read_from_replica", Opt_read_from_replica,
298 ceph_param_read_from_replica),
299 fsparam_flag ("rxbounce", Opt_rxbounce),
300 fsparam_enum ("ms_mode", Opt_ms_mode,
301 ceph_param_ms_mode),
302 fsparam_string ("secret", Opt_secret),
303 fsparam_flag_no ("share", Opt_share),
304 fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay),
305 {}
306};
307
308struct ceph_options *ceph_alloc_options(void)
309{
310 struct ceph_options *opt;
311
312 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
313 if (!opt)
314 return NULL;
315
316 opt->crush_locs = RB_ROOT;
317 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
318 GFP_KERNEL);
319 if (!opt->mon_addr) {
320 kfree(opt);
321 return NULL;
322 }
323
324 opt->flags = CEPH_OPT_DEFAULT;
325 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
326 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
327 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
328 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
329 opt->read_from_replica = CEPH_READ_FROM_REPLICA_DEFAULT;
330 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
331 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
332 return opt;
333}
334EXPORT_SYMBOL(ceph_alloc_options);
335
336void ceph_destroy_options(struct ceph_options *opt)
337{
338 dout("destroy_options %p\n", opt);
339 if (!opt)
340 return;
341
342 ceph_clear_crush_locs(&opt->crush_locs);
343 kfree(opt->name);
344 if (opt->key) {
345 ceph_crypto_key_destroy(opt->key);
346 kfree(opt->key);
347 }
348 kfree(opt->mon_addr);
349 kfree(opt);
350}
351EXPORT_SYMBOL(ceph_destroy_options);
352
353/* get secret from key store */
354static int get_secret(struct ceph_crypto_key *dst, const char *name,
355 struct p_log *log)
356{
357 struct key *ukey;
358 int key_err;
359 int err = 0;
360 struct ceph_crypto_key *ckey;
361
362 ukey = request_key(&key_type_ceph, name, NULL);
363 if (IS_ERR(ukey)) {
364 /* request_key errors don't map nicely to mount(2)
365 errors; don't even try, but still printk */
366 key_err = PTR_ERR(ukey);
367 switch (key_err) {
368 case -ENOKEY:
369 error_plog(log, "Failed due to key not found: %s",
370 name);
371 break;
372 case -EKEYEXPIRED:
373 error_plog(log, "Failed due to expired key: %s",
374 name);
375 break;
376 case -EKEYREVOKED:
377 error_plog(log, "Failed due to revoked key: %s",
378 name);
379 break;
380 default:
381 error_plog(log, "Failed due to key error %d: %s",
382 key_err, name);
383 }
384 err = -EPERM;
385 goto out;
386 }
387
388 ckey = ukey->payload.data[0];
389 err = ceph_crypto_key_clone(dst, ckey);
390 if (err)
391 goto out_key;
392 /* pass through, err is 0 */
393
394out_key:
395 key_put(ukey);
396out:
397 return err;
398}
399
400int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
401 struct fc_log *l, char delim)
402{
403 struct p_log log = {.prefix = "libceph", .log = l};
404 int ret;
405
406 /* ip1[:port1][<delim>ip2[:port2]...] */
407 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
408 &opt->num_mon, delim);
409 if (ret) {
410 error_plog(&log, "Failed to parse monitor IPs: %d", ret);
411 return ret;
412 }
413
414 return 0;
415}
416EXPORT_SYMBOL(ceph_parse_mon_ips);
417
418int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
419 struct fc_log *l)
420{
421 struct fs_parse_result result;
422 int token, err;
423 struct p_log log = {.prefix = "libceph", .log = l};
424
425 token = __fs_parse(&log, ceph_parameters, param, &result);
426 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
427 if (token < 0)
428 return token;
429
430 switch (token) {
431 case Opt_ip:
432 err = ceph_parse_ips(param->string,
433 param->string + param->size,
434 &opt->my_addr, 1, NULL, ',');
435 if (err) {
436 error_plog(&log, "Failed to parse ip: %d", err);
437 return err;
438 }
439 opt->flags |= CEPH_OPT_MYIP;
440 break;
441
442 case Opt_fsid:
443 err = ceph_parse_fsid(param->string, &opt->fsid);
444 if (err) {
445 error_plog(&log, "Failed to parse fsid: %d", err);
446 return err;
447 }
448 opt->flags |= CEPH_OPT_FSID;
449 break;
450 case Opt_name:
451 kfree(opt->name);
452 opt->name = param->string;
453 param->string = NULL;
454 break;
455 case Opt_secret:
456 ceph_crypto_key_destroy(opt->key);
457 kfree(opt->key);
458
459 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
460 if (!opt->key)
461 return -ENOMEM;
462 err = ceph_crypto_key_unarmor(opt->key, param->string);
463 if (err) {
464 error_plog(&log, "Failed to parse secret: %d", err);
465 return err;
466 }
467 break;
468 case Opt_key:
469 ceph_crypto_key_destroy(opt->key);
470 kfree(opt->key);
471
472 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
473 if (!opt->key)
474 return -ENOMEM;
475 return get_secret(opt->key, param->string, &log);
476 case Opt_crush_location:
477 ceph_clear_crush_locs(&opt->crush_locs);
478 err = ceph_parse_crush_location(param->string,
479 &opt->crush_locs);
480 if (err) {
481 error_plog(&log, "Failed to parse CRUSH location: %d",
482 err);
483 return err;
484 }
485 break;
486 case Opt_read_from_replica:
487 switch (result.uint_32) {
488 case Opt_read_from_replica_no:
489 opt->read_from_replica = 0;
490 break;
491 case Opt_read_from_replica_balance:
492 opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS;
493 break;
494 case Opt_read_from_replica_localize:
495 opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS;
496 break;
497 default:
498 BUG();
499 }
500 break;
501 case Opt_ms_mode:
502 switch (result.uint_32) {
503 case Opt_ms_mode_legacy:
504 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
505 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
506 break;
507 case Opt_ms_mode_crc:
508 opt->con_modes[0] = CEPH_CON_MODE_CRC;
509 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
510 break;
511 case Opt_ms_mode_secure:
512 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
513 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
514 break;
515 case Opt_ms_mode_prefer_crc:
516 opt->con_modes[0] = CEPH_CON_MODE_CRC;
517 opt->con_modes[1] = CEPH_CON_MODE_SECURE;
518 break;
519 case Opt_ms_mode_prefer_secure:
520 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
521 opt->con_modes[1] = CEPH_CON_MODE_CRC;
522 break;
523 default:
524 BUG();
525 }
526 break;
527
528 case Opt_osdkeepalivetimeout:
529 /* 0 isn't well defined right now, reject it */
530 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
531 goto out_of_range;
532 opt->osd_keepalive_timeout =
533 msecs_to_jiffies(result.uint_32 * 1000);
534 break;
535 case Opt_osd_idle_ttl:
536 /* 0 isn't well defined right now, reject it */
537 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
538 goto out_of_range;
539 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
540 break;
541 case Opt_mount_timeout:
542 /* 0 is "wait forever" (i.e. infinite timeout) */
543 if (result.uint_32 > INT_MAX / 1000)
544 goto out_of_range;
545 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
546 break;
547 case Opt_osd_request_timeout:
548 /* 0 is "wait forever" (i.e. infinite timeout) */
549 if (result.uint_32 > INT_MAX / 1000)
550 goto out_of_range;
551 opt->osd_request_timeout =
552 msecs_to_jiffies(result.uint_32 * 1000);
553 break;
554
555 case Opt_share:
556 if (!result.negated)
557 opt->flags &= ~CEPH_OPT_NOSHARE;
558 else
559 opt->flags |= CEPH_OPT_NOSHARE;
560 break;
561 case Opt_crc:
562 if (!result.negated)
563 opt->flags &= ~CEPH_OPT_NOCRC;
564 else
565 opt->flags |= CEPH_OPT_NOCRC;
566 break;
567 case Opt_cephx_require_signatures:
568 if (!result.negated)
569 warn_plog(&log, "Ignoring cephx_require_signatures");
570 else
571 warn_plog(&log, "Ignoring nocephx_require_signatures, use nocephx_sign_messages");
572 break;
573 case Opt_cephx_sign_messages:
574 if (!result.negated)
575 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
576 else
577 opt->flags |= CEPH_OPT_NOMSGSIGN;
578 break;
579 case Opt_tcp_nodelay:
580 if (!result.negated)
581 opt->flags |= CEPH_OPT_TCP_NODELAY;
582 else
583 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
584 break;
585
586 case Opt_abort_on_full:
587 opt->flags |= CEPH_OPT_ABORT_ON_FULL;
588 break;
589 case Opt_rxbounce:
590 opt->flags |= CEPH_OPT_RXBOUNCE;
591 break;
592
593 default:
594 BUG();
595 }
596
597 return 0;
598
599out_of_range:
600 return inval_plog(&log, "%s out of range", param->key);
601}
602EXPORT_SYMBOL(ceph_parse_param);
603
604int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
605 bool show_all)
606{
607 struct ceph_options *opt = client->options;
608 size_t pos = m->count;
609 struct rb_node *n;
610
611 if (opt->name) {
612 seq_puts(m, "name=");
613 seq_escape(m, opt->name, ", \t\n\\");
614 seq_putc(m, ',');
615 }
616 if (opt->key)
617 seq_puts(m, "secret=<hidden>,");
618
619 if (!RB_EMPTY_ROOT(&opt->crush_locs)) {
620 seq_puts(m, "crush_location=");
621 for (n = rb_first(&opt->crush_locs); ; ) {
622 struct crush_loc_node *loc =
623 rb_entry(n, struct crush_loc_node, cl_node);
624
625 seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name,
626 loc->cl_loc.cl_name);
627 n = rb_next(n);
628 if (!n)
629 break;
630
631 seq_putc(m, '|');
632 }
633 seq_putc(m, ',');
634 }
635 if (opt->read_from_replica == CEPH_OSD_FLAG_BALANCE_READS) {
636 seq_puts(m, "read_from_replica=balance,");
637 } else if (opt->read_from_replica == CEPH_OSD_FLAG_LOCALIZE_READS) {
638 seq_puts(m, "read_from_replica=localize,");
639 }
640 if (opt->con_modes[0] != CEPH_CON_MODE_UNKNOWN) {
641 if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
642 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
643 seq_puts(m, "ms_mode=crc,");
644 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
645 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
646 seq_puts(m, "ms_mode=secure,");
647 } else if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
648 opt->con_modes[1] == CEPH_CON_MODE_SECURE) {
649 seq_puts(m, "ms_mode=prefer-crc,");
650 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
651 opt->con_modes[1] == CEPH_CON_MODE_CRC) {
652 seq_puts(m, "ms_mode=prefer-secure,");
653 }
654 }
655
656 if (opt->flags & CEPH_OPT_FSID)
657 seq_printf(m, "fsid=%pU,", &opt->fsid);
658 if (opt->flags & CEPH_OPT_NOSHARE)
659 seq_puts(m, "noshare,");
660 if (opt->flags & CEPH_OPT_NOCRC)
661 seq_puts(m, "nocrc,");
662 if (opt->flags & CEPH_OPT_NOMSGSIGN)
663 seq_puts(m, "nocephx_sign_messages,");
664 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
665 seq_puts(m, "notcp_nodelay,");
666 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL))
667 seq_puts(m, "abort_on_full,");
668 if (opt->flags & CEPH_OPT_RXBOUNCE)
669 seq_puts(m, "rxbounce,");
670
671 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
672 seq_printf(m, "mount_timeout=%d,",
673 jiffies_to_msecs(opt->mount_timeout) / 1000);
674 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
675 seq_printf(m, "osd_idle_ttl=%d,",
676 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
677 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
678 seq_printf(m, "osdkeepalivetimeout=%d,",
679 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
680 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
681 seq_printf(m, "osd_request_timeout=%d,",
682 jiffies_to_msecs(opt->osd_request_timeout) / 1000);
683
684 /* drop redundant comma */
685 if (m->count != pos)
686 m->count--;
687
688 return 0;
689}
690EXPORT_SYMBOL(ceph_print_client_options);
691
692struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
693{
694 return &client->msgr.inst.addr;
695}
696EXPORT_SYMBOL(ceph_client_addr);
697
698u64 ceph_client_gid(struct ceph_client *client)
699{
700 return client->monc.auth->global_id;
701}
702EXPORT_SYMBOL(ceph_client_gid);
703
704/*
705 * create a fresh client instance
706 */
707struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
708{
709 struct ceph_client *client;
710 struct ceph_entity_addr *myaddr = NULL;
711 int err;
712
713 err = wait_for_random_bytes();
714 if (err < 0)
715 return ERR_PTR(err);
716
717 client = kzalloc(sizeof(*client), GFP_KERNEL);
718 if (client == NULL)
719 return ERR_PTR(-ENOMEM);
720
721 client->private = private;
722 client->options = opt;
723
724 mutex_init(&client->mount_mutex);
725 init_waitqueue_head(&client->auth_wq);
726 client->auth_err = 0;
727
728 client->extra_mon_dispatch = NULL;
729 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
730 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
731
732 if (!ceph_test_opt(client, NOMSGSIGN))
733 client->required_features |= CEPH_FEATURE_MSG_AUTH;
734
735 /* msgr */
736 if (ceph_test_opt(client, MYIP))
737 myaddr = &client->options->my_addr;
738
739 ceph_messenger_init(&client->msgr, myaddr);
740
741 /* subsystems */
742 err = ceph_monc_init(&client->monc, client);
743 if (err < 0)
744 goto fail;
745 err = ceph_osdc_init(&client->osdc, client);
746 if (err < 0)
747 goto fail_monc;
748
749 return client;
750
751fail_monc:
752 ceph_monc_stop(&client->monc);
753fail:
754 ceph_messenger_fini(&client->msgr);
755 kfree(client);
756 return ERR_PTR(err);
757}
758EXPORT_SYMBOL(ceph_create_client);
759
760void ceph_destroy_client(struct ceph_client *client)
761{
762 dout("destroy_client %p\n", client);
763
764 atomic_set(&client->msgr.stopping, 1);
765
766 /* unmount */
767 ceph_osdc_stop(&client->osdc);
768 ceph_monc_stop(&client->monc);
769 ceph_messenger_fini(&client->msgr);
770
771 ceph_debugfs_client_cleanup(client);
772
773 ceph_destroy_options(client->options);
774
775 kfree(client);
776 dout("destroy_client %p done\n", client);
777}
778EXPORT_SYMBOL(ceph_destroy_client);
779
780void ceph_reset_client_addr(struct ceph_client *client)
781{
782 ceph_messenger_reset_nonce(&client->msgr);
783 ceph_monc_reopen_session(&client->monc);
784 ceph_osdc_reopen_osds(&client->osdc);
785}
786EXPORT_SYMBOL(ceph_reset_client_addr);
787
788/*
789 * true if we have the mon map (and have thus joined the cluster)
790 */
791static bool have_mon_and_osd_map(struct ceph_client *client)
792{
793 return client->monc.monmap && client->monc.monmap->epoch &&
794 client->osdc.osdmap && client->osdc.osdmap->epoch;
795}
796
797/*
798 * mount: join the ceph cluster, and open root directory.
799 */
800int __ceph_open_session(struct ceph_client *client, unsigned long started)
801{
802 unsigned long timeout = client->options->mount_timeout;
803 long err;
804
805 /* open session, and wait for mon and osd maps */
806 err = ceph_monc_open_session(&client->monc);
807 if (err < 0)
808 return err;
809
810 while (!have_mon_and_osd_map(client)) {
811 if (timeout && time_after_eq(jiffies, started + timeout))
812 return -ETIMEDOUT;
813
814 /* wait */
815 dout("mount waiting for mon_map\n");
816 err = wait_event_interruptible_timeout(client->auth_wq,
817 have_mon_and_osd_map(client) || (client->auth_err < 0),
818 ceph_timeout_jiffies(timeout));
819 if (err < 0)
820 return err;
821 if (client->auth_err < 0)
822 return client->auth_err;
823 }
824
825 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
826 &client->fsid);
827 ceph_debugfs_client_init(client);
828
829 return 0;
830}
831EXPORT_SYMBOL(__ceph_open_session);
832
833int ceph_open_session(struct ceph_client *client)
834{
835 int ret;
836 unsigned long started = jiffies; /* note the start time */
837
838 dout("open_session start\n");
839 mutex_lock(&client->mount_mutex);
840
841 ret = __ceph_open_session(client, started);
842
843 mutex_unlock(&client->mount_mutex);
844 return ret;
845}
846EXPORT_SYMBOL(ceph_open_session);
847
848int ceph_wait_for_latest_osdmap(struct ceph_client *client,
849 unsigned long timeout)
850{
851 u64 newest_epoch;
852 int ret;
853
854 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
855 if (ret)
856 return ret;
857
858 if (client->osdc.osdmap->epoch >= newest_epoch)
859 return 0;
860
861 ceph_osdc_maybe_request_map(&client->osdc);
862 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
863}
864EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
865
866static int __init init_ceph_lib(void)
867{
868 int ret = 0;
869
870 ceph_debugfs_init();
871
872 ret = ceph_crypto_init();
873 if (ret < 0)
874 goto out_debugfs;
875
876 ret = ceph_msgr_init();
877 if (ret < 0)
878 goto out_crypto;
879
880 ret = ceph_osdc_setup();
881 if (ret < 0)
882 goto out_msgr;
883
884 pr_info("loaded (mon/osd proto %d/%d)\n",
885 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
886
887 return 0;
888
889out_msgr:
890 ceph_msgr_exit();
891out_crypto:
892 ceph_crypto_shutdown();
893out_debugfs:
894 ceph_debugfs_cleanup();
895 return ret;
896}
897
898static void __exit exit_ceph_lib(void)
899{
900 dout("exit_ceph_lib\n");
901 WARN_ON(!ceph_strings_empty());
902
903 ceph_osdc_cleanup();
904 ceph_msgr_exit();
905 ceph_crypto_shutdown();
906 ceph_debugfs_cleanup();
907}
908
909module_init(init_ceph_lib);
910module_exit(exit_ceph_lib);
911
912MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
913MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
914MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
915MODULE_DESCRIPTION("Ceph core library");
916MODULE_LICENSE("GPL");