Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 /* any matching mon ip implies a match */
180 for (i = 0; i < opt1->num_mon; i++) {
181 if (ceph_monmap_contains(client->monc.monmap,
182 &opt1->mon_addr[i]))
183 return 0;
184 }
185 return -1;
186}
187EXPORT_SYMBOL(ceph_compare_options);
188
189/*
190 * kvmalloc() doesn't fall back to the vmalloc allocator unless flags are
191 * compatible with (a superset of) GFP_KERNEL. This is because while the
192 * actual pages are allocated with the specified flags, the page table pages
193 * are always allocated with GFP_KERNEL. map_vm_area() doesn't even take
194 * flags because GFP_KERNEL is hard-coded in {p4d,pud,pmd,pte}_alloc().
195 *
196 * ceph_kvmalloc() may be called with GFP_KERNEL, GFP_NOFS or GFP_NOIO.
197 */
198void *ceph_kvmalloc(size_t size, gfp_t flags)
199{
200 void *p;
201
202 if ((flags & (__GFP_IO | __GFP_FS)) == (__GFP_IO | __GFP_FS)) {
203 p = kvmalloc(size, flags);
204 } else if ((flags & (__GFP_IO | __GFP_FS)) == __GFP_IO) {
205 unsigned int nofs_flag = memalloc_nofs_save();
206 p = kvmalloc(size, GFP_KERNEL);
207 memalloc_nofs_restore(nofs_flag);
208 } else {
209 unsigned int noio_flag = memalloc_noio_save();
210 p = kvmalloc(size, GFP_KERNEL);
211 memalloc_noio_restore(noio_flag);
212 }
213
214 return p;
215}
216
217static int parse_fsid(const char *str, struct ceph_fsid *fsid)
218{
219 int i = 0;
220 char tmp[3];
221 int err = -EINVAL;
222 int d;
223
224 dout("parse_fsid '%s'\n", str);
225 tmp[2] = 0;
226 while (*str && i < 16) {
227 if (ispunct(*str)) {
228 str++;
229 continue;
230 }
231 if (!isxdigit(str[0]) || !isxdigit(str[1]))
232 break;
233 tmp[0] = str[0];
234 tmp[1] = str[1];
235 if (sscanf(tmp, "%x", &d) < 1)
236 break;
237 fsid->fsid[i] = d & 0xff;
238 i++;
239 str += 2;
240 }
241
242 if (i == 16)
243 err = 0;
244 dout("parse_fsid ret %d got fsid %pU\n", err, fsid);
245 return err;
246}
247
248/*
249 * ceph options
250 */
251enum {
252 Opt_osdtimeout,
253 Opt_osdkeepalivetimeout,
254 Opt_mount_timeout,
255 Opt_osd_idle_ttl,
256 Opt_osd_request_timeout,
257 /* int args above */
258 Opt_fsid,
259 Opt_name,
260 Opt_secret,
261 Opt_key,
262 Opt_ip,
263 /* string args above */
264 Opt_share,
265 Opt_crc,
266 Opt_cephx_require_signatures,
267 Opt_cephx_sign_messages,
268 Opt_tcp_nodelay,
269 Opt_abort_on_full,
270};
271
272static const struct fs_parameter_spec ceph_parameters[] = {
273 fsparam_flag ("abort_on_full", Opt_abort_on_full),
274 fsparam_flag_no ("cephx_require_signatures", Opt_cephx_require_signatures),
275 fsparam_flag_no ("cephx_sign_messages", Opt_cephx_sign_messages),
276 fsparam_flag_no ("crc", Opt_crc),
277 fsparam_string ("fsid", Opt_fsid),
278 fsparam_string ("ip", Opt_ip),
279 fsparam_string ("key", Opt_key),
280 fsparam_u32 ("mount_timeout", Opt_mount_timeout),
281 fsparam_string ("name", Opt_name),
282 fsparam_u32 ("osd_idle_ttl", Opt_osd_idle_ttl),
283 fsparam_u32 ("osd_request_timeout", Opt_osd_request_timeout),
284 fsparam_u32 ("osdkeepalive", Opt_osdkeepalivetimeout),
285 __fsparam (fs_param_is_s32, "osdtimeout", Opt_osdtimeout,
286 fs_param_deprecated, NULL),
287 fsparam_string ("secret", Opt_secret),
288 fsparam_flag_no ("share", Opt_share),
289 fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay),
290 {}
291};
292
293struct ceph_options *ceph_alloc_options(void)
294{
295 struct ceph_options *opt;
296
297 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
298 if (!opt)
299 return NULL;
300
301 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
302 GFP_KERNEL);
303 if (!opt->mon_addr) {
304 kfree(opt);
305 return NULL;
306 }
307
308 opt->flags = CEPH_OPT_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 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
313 return opt;
314}
315EXPORT_SYMBOL(ceph_alloc_options);
316
317void ceph_destroy_options(struct ceph_options *opt)
318{
319 dout("destroy_options %p\n", opt);
320 if (!opt)
321 return;
322
323 kfree(opt->name);
324 if (opt->key) {
325 ceph_crypto_key_destroy(opt->key);
326 kfree(opt->key);
327 }
328 kfree(opt->mon_addr);
329 kfree(opt);
330}
331EXPORT_SYMBOL(ceph_destroy_options);
332
333/* get secret from key store */
334static int get_secret(struct ceph_crypto_key *dst, const char *name,
335 struct p_log *log)
336{
337 struct key *ukey;
338 int key_err;
339 int err = 0;
340 struct ceph_crypto_key *ckey;
341
342 ukey = request_key(&key_type_ceph, name, NULL);
343 if (IS_ERR(ukey)) {
344 /* request_key errors don't map nicely to mount(2)
345 errors; don't even try, but still printk */
346 key_err = PTR_ERR(ukey);
347 switch (key_err) {
348 case -ENOKEY:
349 error_plog(log, "Failed due to key not found: %s",
350 name);
351 break;
352 case -EKEYEXPIRED:
353 error_plog(log, "Failed due to expired key: %s",
354 name);
355 break;
356 case -EKEYREVOKED:
357 error_plog(log, "Failed due to revoked key: %s",
358 name);
359 break;
360 default:
361 error_plog(log, "Failed due to key error %d: %s",
362 key_err, name);
363 }
364 err = -EPERM;
365 goto out;
366 }
367
368 ckey = ukey->payload.data[0];
369 err = ceph_crypto_key_clone(dst, ckey);
370 if (err)
371 goto out_key;
372 /* pass through, err is 0 */
373
374out_key:
375 key_put(ukey);
376out:
377 return err;
378}
379
380int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
381 struct fc_log *l)
382{
383 struct p_log log = {.prefix = "libceph", .log = l};
384 int ret;
385
386 /* ip1[:port1][,ip2[:port2]...] */
387 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
388 &opt->num_mon);
389 if (ret) {
390 error_plog(&log, "Failed to parse monitor IPs: %d", ret);
391 return ret;
392 }
393
394 return 0;
395}
396EXPORT_SYMBOL(ceph_parse_mon_ips);
397
398int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
399 struct fc_log *l)
400{
401 struct fs_parse_result result;
402 int token, err;
403 struct p_log log = {.prefix = "libceph", .log = l};
404
405 token = __fs_parse(&log, ceph_parameters, param, &result);
406 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
407 if (token < 0)
408 return token;
409
410 switch (token) {
411 case Opt_ip:
412 err = ceph_parse_ips(param->string,
413 param->string + param->size,
414 &opt->my_addr,
415 1, NULL);
416 if (err) {
417 error_plog(&log, "Failed to parse ip: %d", err);
418 return err;
419 }
420 opt->flags |= CEPH_OPT_MYIP;
421 break;
422
423 case Opt_fsid:
424 err = parse_fsid(param->string, &opt->fsid);
425 if (err) {
426 error_plog(&log, "Failed to parse fsid: %d", err);
427 return err;
428 }
429 opt->flags |= CEPH_OPT_FSID;
430 break;
431 case Opt_name:
432 kfree(opt->name);
433 opt->name = param->string;
434 param->string = NULL;
435 break;
436 case Opt_secret:
437 ceph_crypto_key_destroy(opt->key);
438 kfree(opt->key);
439
440 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
441 if (!opt->key)
442 return -ENOMEM;
443 err = ceph_crypto_key_unarmor(opt->key, param->string);
444 if (err) {
445 error_plog(&log, "Failed to parse secret: %d", err);
446 return err;
447 }
448 break;
449 case Opt_key:
450 ceph_crypto_key_destroy(opt->key);
451 kfree(opt->key);
452
453 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
454 if (!opt->key)
455 return -ENOMEM;
456 return get_secret(opt->key, param->string, &log);
457
458 case Opt_osdtimeout:
459 warn_plog(&log, "Ignoring osdtimeout");
460 break;
461 case Opt_osdkeepalivetimeout:
462 /* 0 isn't well defined right now, reject it */
463 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
464 goto out_of_range;
465 opt->osd_keepalive_timeout =
466 msecs_to_jiffies(result.uint_32 * 1000);
467 break;
468 case Opt_osd_idle_ttl:
469 /* 0 isn't well defined right now, reject it */
470 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
471 goto out_of_range;
472 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
473 break;
474 case Opt_mount_timeout:
475 /* 0 is "wait forever" (i.e. infinite timeout) */
476 if (result.uint_32 > INT_MAX / 1000)
477 goto out_of_range;
478 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
479 break;
480 case Opt_osd_request_timeout:
481 /* 0 is "wait forever" (i.e. infinite timeout) */
482 if (result.uint_32 > INT_MAX / 1000)
483 goto out_of_range;
484 opt->osd_request_timeout =
485 msecs_to_jiffies(result.uint_32 * 1000);
486 break;
487
488 case Opt_share:
489 if (!result.negated)
490 opt->flags &= ~CEPH_OPT_NOSHARE;
491 else
492 opt->flags |= CEPH_OPT_NOSHARE;
493 break;
494 case Opt_crc:
495 if (!result.negated)
496 opt->flags &= ~CEPH_OPT_NOCRC;
497 else
498 opt->flags |= CEPH_OPT_NOCRC;
499 break;
500 case Opt_cephx_require_signatures:
501 if (!result.negated)
502 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
503 else
504 opt->flags |= CEPH_OPT_NOMSGAUTH;
505 break;
506 case Opt_cephx_sign_messages:
507 if (!result.negated)
508 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
509 else
510 opt->flags |= CEPH_OPT_NOMSGSIGN;
511 break;
512 case Opt_tcp_nodelay:
513 if (!result.negated)
514 opt->flags |= CEPH_OPT_TCP_NODELAY;
515 else
516 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
517 break;
518
519 case Opt_abort_on_full:
520 opt->flags |= CEPH_OPT_ABORT_ON_FULL;
521 break;
522
523 default:
524 BUG();
525 }
526
527 return 0;
528
529out_of_range:
530 return inval_plog(&log, "%s out of range", param->key);
531}
532EXPORT_SYMBOL(ceph_parse_param);
533
534int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
535 bool show_all)
536{
537 struct ceph_options *opt = client->options;
538 size_t pos = m->count;
539
540 if (opt->name) {
541 seq_puts(m, "name=");
542 seq_escape(m, opt->name, ", \t\n\\");
543 seq_putc(m, ',');
544 }
545 if (opt->key)
546 seq_puts(m, "secret=<hidden>,");
547
548 if (opt->flags & CEPH_OPT_FSID)
549 seq_printf(m, "fsid=%pU,", &opt->fsid);
550 if (opt->flags & CEPH_OPT_NOSHARE)
551 seq_puts(m, "noshare,");
552 if (opt->flags & CEPH_OPT_NOCRC)
553 seq_puts(m, "nocrc,");
554 if (opt->flags & CEPH_OPT_NOMSGAUTH)
555 seq_puts(m, "nocephx_require_signatures,");
556 if (opt->flags & CEPH_OPT_NOMSGSIGN)
557 seq_puts(m, "nocephx_sign_messages,");
558 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
559 seq_puts(m, "notcp_nodelay,");
560 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL))
561 seq_puts(m, "abort_on_full,");
562
563 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
564 seq_printf(m, "mount_timeout=%d,",
565 jiffies_to_msecs(opt->mount_timeout) / 1000);
566 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
567 seq_printf(m, "osd_idle_ttl=%d,",
568 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
569 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
570 seq_printf(m, "osdkeepalivetimeout=%d,",
571 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
572 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
573 seq_printf(m, "osd_request_timeout=%d,",
574 jiffies_to_msecs(opt->osd_request_timeout) / 1000);
575
576 /* drop redundant comma */
577 if (m->count != pos)
578 m->count--;
579
580 return 0;
581}
582EXPORT_SYMBOL(ceph_print_client_options);
583
584struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
585{
586 return &client->msgr.inst.addr;
587}
588EXPORT_SYMBOL(ceph_client_addr);
589
590u64 ceph_client_gid(struct ceph_client *client)
591{
592 return client->monc.auth->global_id;
593}
594EXPORT_SYMBOL(ceph_client_gid);
595
596/*
597 * create a fresh client instance
598 */
599struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
600{
601 struct ceph_client *client;
602 struct ceph_entity_addr *myaddr = NULL;
603 int err;
604
605 err = wait_for_random_bytes();
606 if (err < 0)
607 return ERR_PTR(err);
608
609 client = kzalloc(sizeof(*client), GFP_KERNEL);
610 if (client == NULL)
611 return ERR_PTR(-ENOMEM);
612
613 client->private = private;
614 client->options = opt;
615
616 mutex_init(&client->mount_mutex);
617 init_waitqueue_head(&client->auth_wq);
618 client->auth_err = 0;
619
620 client->extra_mon_dispatch = NULL;
621 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
622 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
623
624 if (!ceph_test_opt(client, NOMSGAUTH))
625 client->required_features |= CEPH_FEATURE_MSG_AUTH;
626
627 /* msgr */
628 if (ceph_test_opt(client, MYIP))
629 myaddr = &client->options->my_addr;
630
631 ceph_messenger_init(&client->msgr, myaddr);
632
633 /* subsystems */
634 err = ceph_monc_init(&client->monc, client);
635 if (err < 0)
636 goto fail;
637 err = ceph_osdc_init(&client->osdc, client);
638 if (err < 0)
639 goto fail_monc;
640
641 return client;
642
643fail_monc:
644 ceph_monc_stop(&client->monc);
645fail:
646 ceph_messenger_fini(&client->msgr);
647 kfree(client);
648 return ERR_PTR(err);
649}
650EXPORT_SYMBOL(ceph_create_client);
651
652void ceph_destroy_client(struct ceph_client *client)
653{
654 dout("destroy_client %p\n", client);
655
656 atomic_set(&client->msgr.stopping, 1);
657
658 /* unmount */
659 ceph_osdc_stop(&client->osdc);
660 ceph_monc_stop(&client->monc);
661 ceph_messenger_fini(&client->msgr);
662
663 ceph_debugfs_client_cleanup(client);
664
665 ceph_destroy_options(client->options);
666
667 kfree(client);
668 dout("destroy_client %p done\n", client);
669}
670EXPORT_SYMBOL(ceph_destroy_client);
671
672void ceph_reset_client_addr(struct ceph_client *client)
673{
674 ceph_messenger_reset_nonce(&client->msgr);
675 ceph_monc_reopen_session(&client->monc);
676 ceph_osdc_reopen_osds(&client->osdc);
677}
678EXPORT_SYMBOL(ceph_reset_client_addr);
679
680/*
681 * true if we have the mon map (and have thus joined the cluster)
682 */
683static bool have_mon_and_osd_map(struct ceph_client *client)
684{
685 return client->monc.monmap && client->monc.monmap->epoch &&
686 client->osdc.osdmap && client->osdc.osdmap->epoch;
687}
688
689/*
690 * mount: join the ceph cluster, and open root directory.
691 */
692int __ceph_open_session(struct ceph_client *client, unsigned long started)
693{
694 unsigned long timeout = client->options->mount_timeout;
695 long err;
696
697 /* open session, and wait for mon and osd maps */
698 err = ceph_monc_open_session(&client->monc);
699 if (err < 0)
700 return err;
701
702 while (!have_mon_and_osd_map(client)) {
703 if (timeout && time_after_eq(jiffies, started + timeout))
704 return -ETIMEDOUT;
705
706 /* wait */
707 dout("mount waiting for mon_map\n");
708 err = wait_event_interruptible_timeout(client->auth_wq,
709 have_mon_and_osd_map(client) || (client->auth_err < 0),
710 ceph_timeout_jiffies(timeout));
711 if (err < 0)
712 return err;
713 if (client->auth_err < 0)
714 return client->auth_err;
715 }
716
717 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
718 &client->fsid);
719 ceph_debugfs_client_init(client);
720
721 return 0;
722}
723EXPORT_SYMBOL(__ceph_open_session);
724
725int ceph_open_session(struct ceph_client *client)
726{
727 int ret;
728 unsigned long started = jiffies; /* note the start time */
729
730 dout("open_session start\n");
731 mutex_lock(&client->mount_mutex);
732
733 ret = __ceph_open_session(client, started);
734
735 mutex_unlock(&client->mount_mutex);
736 return ret;
737}
738EXPORT_SYMBOL(ceph_open_session);
739
740int ceph_wait_for_latest_osdmap(struct ceph_client *client,
741 unsigned long timeout)
742{
743 u64 newest_epoch;
744 int ret;
745
746 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
747 if (ret)
748 return ret;
749
750 if (client->osdc.osdmap->epoch >= newest_epoch)
751 return 0;
752
753 ceph_osdc_maybe_request_map(&client->osdc);
754 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
755}
756EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
757
758static int __init init_ceph_lib(void)
759{
760 int ret = 0;
761
762 ceph_debugfs_init();
763
764 ret = ceph_crypto_init();
765 if (ret < 0)
766 goto out_debugfs;
767
768 ret = ceph_msgr_init();
769 if (ret < 0)
770 goto out_crypto;
771
772 ret = ceph_osdc_setup();
773 if (ret < 0)
774 goto out_msgr;
775
776 pr_info("loaded (mon/osd proto %d/%d)\n",
777 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
778
779 return 0;
780
781out_msgr:
782 ceph_msgr_exit();
783out_crypto:
784 ceph_crypto_shutdown();
785out_debugfs:
786 ceph_debugfs_cleanup();
787 return ret;
788}
789
790static void __exit exit_ceph_lib(void)
791{
792 dout("exit_ceph_lib\n");
793 WARN_ON(!ceph_strings_empty());
794
795 ceph_osdc_cleanup();
796 ceph_msgr_exit();
797 ceph_crypto_shutdown();
798 ceph_debugfs_cleanup();
799}
800
801module_init(init_ceph_lib);
802module_exit(exit_ceph_lib);
803
804MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
805MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
806MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
807MODULE_DESCRIPTION("Ceph core library");
808MODULE_LICENSE("GPL");