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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, &param_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_obj(*opt);
313 if (!opt)
314 return NULL;
315
316 opt->crush_locs = RB_ROOT;
317 opt->mon_addr = kzalloc_objs(*opt->mon_addr, CEPH_MAX_MON);
318 if (!opt->mon_addr) {
319 kfree(opt);
320 return NULL;
321 }
322
323 opt->flags = CEPH_OPT_DEFAULT;
324 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
325 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
326 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
327 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
328 opt->read_from_replica = CEPH_READ_FROM_REPLICA_DEFAULT;
329 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
330 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
331 return opt;
332}
333EXPORT_SYMBOL(ceph_alloc_options);
334
335void ceph_destroy_options(struct ceph_options *opt)
336{
337 dout("destroy_options %p\n", opt);
338 if (!opt)
339 return;
340
341 ceph_clear_crush_locs(&opt->crush_locs);
342 kfree(opt->name);
343 if (opt->key) {
344 ceph_crypto_key_destroy(opt->key);
345 kfree(opt->key);
346 }
347 kfree(opt->mon_addr);
348 kfree(opt);
349}
350EXPORT_SYMBOL(ceph_destroy_options);
351
352/* get secret from key store */
353static int get_secret(struct ceph_crypto_key *dst, const char *name,
354 struct p_log *log)
355{
356 struct key *ukey;
357 int key_err;
358 int err = 0;
359 struct ceph_crypto_key *ckey;
360
361 ukey = request_key(&key_type_ceph, name, NULL);
362 if (IS_ERR(ukey)) {
363 /* request_key errors don't map nicely to mount(2)
364 errors; don't even try, but still printk */
365 key_err = PTR_ERR(ukey);
366 switch (key_err) {
367 case -ENOKEY:
368 error_plog(log, "Failed due to key not found: %s",
369 name);
370 break;
371 case -EKEYEXPIRED:
372 error_plog(log, "Failed due to expired key: %s",
373 name);
374 break;
375 case -EKEYREVOKED:
376 error_plog(log, "Failed due to revoked key: %s",
377 name);
378 break;
379 default:
380 error_plog(log, "Failed due to key error %d: %s",
381 key_err, name);
382 }
383 err = -EPERM;
384 goto out;
385 }
386
387 ckey = ukey->payload.data[0];
388 err = ceph_crypto_key_clone(dst, ckey);
389 if (err)
390 goto out_key;
391 /* pass through, err is 0 */
392
393out_key:
394 key_put(ukey);
395out:
396 return err;
397}
398
399int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
400 struct fc_log *l, char delim)
401{
402 struct p_log log = {.prefix = "libceph", .log = l};
403 int ret;
404
405 /* ip1[:port1][<delim>ip2[:port2]...] */
406 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
407 &opt->num_mon, delim);
408 if (ret) {
409 error_plog(&log, "Failed to parse monitor IPs: %d", ret);
410 return ret;
411 }
412
413 return 0;
414}
415EXPORT_SYMBOL(ceph_parse_mon_ips);
416
417int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
418 struct fc_log *l)
419{
420 struct fs_parse_result result;
421 int token, err;
422 struct p_log log = {.prefix = "libceph", .log = l};
423
424 token = __fs_parse(&log, ceph_parameters, param, &result);
425 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
426 if (token < 0)
427 return token;
428
429 switch (token) {
430 case Opt_ip:
431 err = ceph_parse_ips(param->string,
432 param->string + param->size,
433 &opt->my_addr, 1, NULL, ',');
434 if (err) {
435 error_plog(&log, "Failed to parse ip: %d", err);
436 return err;
437 }
438 opt->flags |= CEPH_OPT_MYIP;
439 break;
440
441 case Opt_fsid:
442 err = ceph_parse_fsid(param->string, &opt->fsid);
443 if (err) {
444 error_plog(&log, "Failed to parse fsid: %d", err);
445 return err;
446 }
447 opt->flags |= CEPH_OPT_FSID;
448 break;
449 case Opt_name:
450 kfree(opt->name);
451 opt->name = param->string;
452 param->string = NULL;
453 break;
454 case Opt_secret:
455 ceph_crypto_key_destroy(opt->key);
456 kfree(opt->key);
457
458 opt->key = kzalloc_obj(*opt->key);
459 if (!opt->key)
460 return -ENOMEM;
461 err = ceph_crypto_key_unarmor(opt->key, param->string);
462 if (err) {
463 error_plog(&log, "Failed to parse secret: %d", err);
464 return err;
465 }
466 break;
467 case Opt_key:
468 ceph_crypto_key_destroy(opt->key);
469 kfree(opt->key);
470
471 opt->key = kzalloc_obj(*opt->key);
472 if (!opt->key)
473 return -ENOMEM;
474 return get_secret(opt->key, param->string, &log);
475 case Opt_crush_location:
476 ceph_clear_crush_locs(&opt->crush_locs);
477 err = ceph_parse_crush_location(param->string,
478 &opt->crush_locs);
479 if (err) {
480 error_plog(&log, "Failed to parse CRUSH location: %d",
481 err);
482 return err;
483 }
484 break;
485 case Opt_read_from_replica:
486 switch (result.uint_32) {
487 case Opt_read_from_replica_no:
488 opt->read_from_replica = 0;
489 break;
490 case Opt_read_from_replica_balance:
491 opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS;
492 break;
493 case Opt_read_from_replica_localize:
494 opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS;
495 break;
496 default:
497 BUG();
498 }
499 break;
500 case Opt_ms_mode:
501 switch (result.uint_32) {
502 case Opt_ms_mode_legacy:
503 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
504 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
505 break;
506 case Opt_ms_mode_crc:
507 opt->con_modes[0] = CEPH_CON_MODE_CRC;
508 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
509 break;
510 case Opt_ms_mode_secure:
511 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
512 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
513 break;
514 case Opt_ms_mode_prefer_crc:
515 opt->con_modes[0] = CEPH_CON_MODE_CRC;
516 opt->con_modes[1] = CEPH_CON_MODE_SECURE;
517 break;
518 case Opt_ms_mode_prefer_secure:
519 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
520 opt->con_modes[1] = CEPH_CON_MODE_CRC;
521 break;
522 default:
523 BUG();
524 }
525 break;
526
527 case Opt_osdkeepalivetimeout:
528 /* 0 isn't well defined right now, reject it */
529 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
530 goto out_of_range;
531 opt->osd_keepalive_timeout =
532 msecs_to_jiffies(result.uint_32 * 1000);
533 break;
534 case Opt_osd_idle_ttl:
535 /* 0 isn't well defined right now, reject it */
536 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
537 goto out_of_range;
538 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
539 break;
540 case Opt_mount_timeout:
541 /* 0 is "wait forever" (i.e. infinite timeout) */
542 if (result.uint_32 > INT_MAX / 1000)
543 goto out_of_range;
544 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
545 break;
546 case Opt_osd_request_timeout:
547 /* 0 is "wait forever" (i.e. infinite timeout) */
548 if (result.uint_32 > INT_MAX / 1000)
549 goto out_of_range;
550 opt->osd_request_timeout =
551 msecs_to_jiffies(result.uint_32 * 1000);
552 break;
553
554 case Opt_share:
555 if (!result.negated)
556 opt->flags &= ~CEPH_OPT_NOSHARE;
557 else
558 opt->flags |= CEPH_OPT_NOSHARE;
559 break;
560 case Opt_crc:
561 if (!result.negated)
562 opt->flags &= ~CEPH_OPT_NOCRC;
563 else
564 opt->flags |= CEPH_OPT_NOCRC;
565 break;
566 case Opt_cephx_require_signatures:
567 if (!result.negated)
568 warn_plog(&log, "Ignoring cephx_require_signatures");
569 else
570 warn_plog(&log, "Ignoring nocephx_require_signatures, use nocephx_sign_messages");
571 break;
572 case Opt_cephx_sign_messages:
573 if (!result.negated)
574 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
575 else
576 opt->flags |= CEPH_OPT_NOMSGSIGN;
577 break;
578 case Opt_tcp_nodelay:
579 if (!result.negated)
580 opt->flags |= CEPH_OPT_TCP_NODELAY;
581 else
582 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
583 break;
584
585 case Opt_abort_on_full:
586 opt->flags |= CEPH_OPT_ABORT_ON_FULL;
587 break;
588 case Opt_rxbounce:
589 opt->flags |= CEPH_OPT_RXBOUNCE;
590 break;
591
592 default:
593 BUG();
594 }
595
596 return 0;
597
598out_of_range:
599 return inval_plog(&log, "%s out of range", param->key);
600}
601EXPORT_SYMBOL(ceph_parse_param);
602
603int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
604 bool show_all)
605{
606 struct ceph_options *opt = client->options;
607 size_t pos = m->count;
608 struct rb_node *n;
609
610 if (opt->name) {
611 seq_puts(m, "name=");
612 seq_escape(m, opt->name, ", \t\n\\");
613 seq_putc(m, ',');
614 }
615 if (opt->key)
616 seq_puts(m, "secret=<hidden>,");
617
618 if (!RB_EMPTY_ROOT(&opt->crush_locs)) {
619 seq_puts(m, "crush_location=");
620 for (n = rb_first(&opt->crush_locs); ; ) {
621 struct crush_loc_node *loc =
622 rb_entry(n, struct crush_loc_node, cl_node);
623
624 seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name,
625 loc->cl_loc.cl_name);
626 n = rb_next(n);
627 if (!n)
628 break;
629
630 seq_putc(m, '|');
631 }
632 seq_putc(m, ',');
633 }
634 if (opt->read_from_replica == CEPH_OSD_FLAG_BALANCE_READS) {
635 seq_puts(m, "read_from_replica=balance,");
636 } else if (opt->read_from_replica == CEPH_OSD_FLAG_LOCALIZE_READS) {
637 seq_puts(m, "read_from_replica=localize,");
638 }
639 if (opt->con_modes[0] != CEPH_CON_MODE_UNKNOWN) {
640 if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
641 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
642 seq_puts(m, "ms_mode=crc,");
643 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
644 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
645 seq_puts(m, "ms_mode=secure,");
646 } else if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
647 opt->con_modes[1] == CEPH_CON_MODE_SECURE) {
648 seq_puts(m, "ms_mode=prefer-crc,");
649 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
650 opt->con_modes[1] == CEPH_CON_MODE_CRC) {
651 seq_puts(m, "ms_mode=prefer-secure,");
652 }
653 }
654
655 if (opt->flags & CEPH_OPT_FSID)
656 seq_printf(m, "fsid=%pU,", &opt->fsid);
657 if (opt->flags & CEPH_OPT_NOSHARE)
658 seq_puts(m, "noshare,");
659 if (opt->flags & CEPH_OPT_NOCRC)
660 seq_puts(m, "nocrc,");
661 if (opt->flags & CEPH_OPT_NOMSGSIGN)
662 seq_puts(m, "nocephx_sign_messages,");
663 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
664 seq_puts(m, "notcp_nodelay,");
665 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL))
666 seq_puts(m, "abort_on_full,");
667 if (opt->flags & CEPH_OPT_RXBOUNCE)
668 seq_puts(m, "rxbounce,");
669
670 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
671 seq_printf(m, "mount_timeout=%d,",
672 jiffies_to_msecs(opt->mount_timeout) / 1000);
673 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
674 seq_printf(m, "osd_idle_ttl=%d,",
675 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
676 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
677 seq_printf(m, "osdkeepalivetimeout=%d,",
678 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
679 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
680 seq_printf(m, "osd_request_timeout=%d,",
681 jiffies_to_msecs(opt->osd_request_timeout) / 1000);
682
683 /* drop redundant comma */
684 if (m->count != pos)
685 m->count--;
686
687 return 0;
688}
689EXPORT_SYMBOL(ceph_print_client_options);
690
691struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
692{
693 return &client->msgr.inst.addr;
694}
695EXPORT_SYMBOL(ceph_client_addr);
696
697u64 ceph_client_gid(struct ceph_client *client)
698{
699 return client->monc.auth->global_id;
700}
701EXPORT_SYMBOL(ceph_client_gid);
702
703/*
704 * create a fresh client instance
705 */
706struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
707{
708 struct ceph_client *client;
709 struct ceph_entity_addr *myaddr = NULL;
710 int err;
711
712 err = wait_for_random_bytes();
713 if (err < 0)
714 return ERR_PTR(err);
715
716 client = kzalloc_obj(*client);
717 if (client == NULL)
718 return ERR_PTR(-ENOMEM);
719
720 client->private = private;
721 client->options = opt;
722
723 mutex_init(&client->mount_mutex);
724 init_waitqueue_head(&client->auth_wq);
725 client->auth_err = 0;
726
727 client->extra_mon_dispatch = NULL;
728 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
729 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
730
731 if (!ceph_test_opt(client, NOMSGSIGN))
732 client->required_features |= CEPH_FEATURE_MSG_AUTH;
733
734 /* msgr */
735 if (ceph_test_opt(client, MYIP))
736 myaddr = &client->options->my_addr;
737
738 ceph_messenger_init(&client->msgr, myaddr);
739
740 /* subsystems */
741 err = ceph_monc_init(&client->monc, client);
742 if (err < 0)
743 goto fail;
744 err = ceph_osdc_init(&client->osdc, client);
745 if (err < 0)
746 goto fail_monc;
747
748 return client;
749
750fail_monc:
751 ceph_monc_stop(&client->monc);
752fail:
753 ceph_messenger_fini(&client->msgr);
754 kfree(client);
755 return ERR_PTR(err);
756}
757EXPORT_SYMBOL(ceph_create_client);
758
759void ceph_destroy_client(struct ceph_client *client)
760{
761 dout("destroy_client %p\n", client);
762
763 atomic_set(&client->msgr.stopping, 1);
764
765 ceph_debugfs_client_cleanup(client);
766
767 /* unmount */
768 ceph_osdc_stop(&client->osdc);
769 ceph_monc_stop(&client->monc);
770 ceph_messenger_fini(&client->msgr);
771
772 ceph_destroy_options(client->options);
773
774 kfree(client);
775 dout("destroy_client %p done\n", client);
776}
777EXPORT_SYMBOL(ceph_destroy_client);
778
779void ceph_reset_client_addr(struct ceph_client *client)
780{
781 ceph_messenger_reset_nonce(&client->msgr);
782 ceph_monc_reopen_session(&client->monc);
783 ceph_osdc_reopen_osds(&client->osdc);
784}
785EXPORT_SYMBOL(ceph_reset_client_addr);
786
787/*
788 * mount: join the ceph cluster, and open root directory.
789 */
790int __ceph_open_session(struct ceph_client *client)
791{
792 DEFINE_WAIT_FUNC(wait, woken_wake_function);
793 long timeout = ceph_timeout_jiffies(client->options->mount_timeout);
794 bool have_monmap, have_osdmap;
795 int err;
796
797 /* open session, and wait for mon and osd maps */
798 err = ceph_monc_open_session(&client->monc);
799 if (err < 0)
800 return err;
801
802 add_wait_queue(&client->auth_wq, &wait);
803 for (;;) {
804 mutex_lock(&client->monc.mutex);
805 err = client->auth_err;
806 have_monmap = client->monc.monmap && client->monc.monmap->epoch;
807 mutex_unlock(&client->monc.mutex);
808
809 down_read(&client->osdc.lock);
810 have_osdmap = client->osdc.osdmap && client->osdc.osdmap->epoch;
811 up_read(&client->osdc.lock);
812
813 if (err || (have_monmap && have_osdmap))
814 break;
815
816 if (signal_pending(current)) {
817 err = -ERESTARTSYS;
818 break;
819 }
820
821 if (!timeout) {
822 err = -ETIMEDOUT;
823 break;
824 }
825
826 /* wait */
827 dout("mount waiting for mon_map\n");
828 timeout = wait_woken(&wait, TASK_INTERRUPTIBLE, timeout);
829 }
830 remove_wait_queue(&client->auth_wq, &wait);
831
832 if (err)
833 return err;
834
835 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
836 &client->fsid);
837 ceph_debugfs_client_init(client);
838
839 return 0;
840}
841EXPORT_SYMBOL(__ceph_open_session);
842
843int ceph_open_session(struct ceph_client *client)
844{
845 int ret;
846
847 dout("open_session start\n");
848 mutex_lock(&client->mount_mutex);
849
850 ret = __ceph_open_session(client);
851
852 mutex_unlock(&client->mount_mutex);
853 return ret;
854}
855EXPORT_SYMBOL(ceph_open_session);
856
857int ceph_wait_for_latest_osdmap(struct ceph_client *client,
858 unsigned long timeout)
859{
860 u64 newest_epoch;
861 int ret;
862
863 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
864 if (ret)
865 return ret;
866
867 if (client->osdc.osdmap->epoch >= newest_epoch)
868 return 0;
869
870 ceph_osdc_maybe_request_map(&client->osdc);
871 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
872}
873EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
874
875static int __init init_ceph_lib(void)
876{
877 int ret = 0;
878
879 ceph_debugfs_init();
880
881 ret = ceph_crypto_init();
882 if (ret < 0)
883 goto out_debugfs;
884
885 ret = ceph_msgr_init();
886 if (ret < 0)
887 goto out_crypto;
888
889 ret = ceph_osdc_setup();
890 if (ret < 0)
891 goto out_msgr;
892
893 pr_info("loaded (mon/osd proto %d/%d)\n",
894 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
895
896 return 0;
897
898out_msgr:
899 ceph_msgr_exit();
900out_crypto:
901 ceph_crypto_shutdown();
902out_debugfs:
903 ceph_debugfs_cleanup();
904 return ret;
905}
906
907static void __exit exit_ceph_lib(void)
908{
909 dout("exit_ceph_lib\n");
910 WARN_ON(!ceph_strings_empty());
911
912 ceph_osdc_cleanup();
913 ceph_msgr_exit();
914 ceph_crypto_shutdown();
915 ceph_debugfs_cleanup();
916}
917
918module_init(init_ceph_lib);
919module_exit(exit_ceph_lib);
920
921MODULE_AUTHOR("Sage Weil <[email protected]>");
922MODULE_AUTHOR("Yehuda Sadeh <[email protected]>");
923MODULE_AUTHOR("Patience Warnick <[email protected]>");
924MODULE_DESCRIPTION("Ceph core library");
925MODULE_LICENSE("GPL");