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 */
libceph_compatible(void * data)44 bool libceph_compatible(void *data)
45 {
46 return true;
47 }
48 EXPORT_SYMBOL(libceph_compatible);
49
param_get_supported_features(char * buffer,const struct kernel_param * kp)50 static 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 }
55 static const struct kernel_param_ops param_ops_supported_features = {
56 .get = param_get_supported_features,
57 };
58 module_param_cb(supported_features, ¶m_ops_supported_features, NULL,
59 0444);
60
ceph_msg_type_name(int type)61 const 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 }
100 EXPORT_SYMBOL(ceph_msg_type_name);
101
102 /*
103 * Initially learn our fsid, or verify an fsid matches.
104 */
ceph_check_fsid(struct ceph_client * client,struct ceph_fsid * fsid)105 int 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 }
118 EXPORT_SYMBOL(ceph_check_fsid);
119
strcmp_null(const char * s1,const char * s2)120 static 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
ceph_compare_options(struct ceph_options * new_opt,struct ceph_client * client)131 int 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 }
191 EXPORT_SYMBOL(ceph_compare_options);
192
193 /*
194 * kvmalloc() doesn't fall back to the vmalloc allocator unless flags are
195 * compatible with (a superset of) GFP_KERNEL. This is because while the
196 * actual pages are allocated with the specified flags, the page table pages
197 * are always allocated with GFP_KERNEL.
198 *
199 * ceph_kvmalloc() may be called with GFP_KERNEL, GFP_NOFS or GFP_NOIO.
200 */
ceph_kvmalloc(size_t size,gfp_t flags)201 void *ceph_kvmalloc(size_t size, gfp_t flags)
202 {
203 void *p;
204
205 if ((flags & (__GFP_IO | __GFP_FS)) == (__GFP_IO | __GFP_FS)) {
206 p = kvmalloc(size, flags);
207 } else if ((flags & (__GFP_IO | __GFP_FS)) == __GFP_IO) {
208 unsigned int nofs_flag = memalloc_nofs_save();
209 p = kvmalloc(size, GFP_KERNEL);
210 memalloc_nofs_restore(nofs_flag);
211 } else {
212 unsigned int noio_flag = memalloc_noio_save();
213 p = kvmalloc(size, GFP_KERNEL);
214 memalloc_noio_restore(noio_flag);
215 }
216
217 return p;
218 }
219
parse_fsid(const char * str,struct ceph_fsid * fsid)220 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
221 {
222 int i = 0;
223 char tmp[3];
224 int err = -EINVAL;
225 int d;
226
227 dout("parse_fsid '%s'\n", str);
228 tmp[2] = 0;
229 while (*str && i < 16) {
230 if (ispunct(*str)) {
231 str++;
232 continue;
233 }
234 if (!isxdigit(str[0]) || !isxdigit(str[1]))
235 break;
236 tmp[0] = str[0];
237 tmp[1] = str[1];
238 if (sscanf(tmp, "%x", &d) < 1)
239 break;
240 fsid->fsid[i] = d & 0xff;
241 i++;
242 str += 2;
243 }
244
245 if (i == 16)
246 err = 0;
247 dout("parse_fsid ret %d got fsid %pU\n", err, fsid);
248 return err;
249 }
250
251 /*
252 * ceph options
253 */
254 enum {
255 Opt_osdkeepalivetimeout,
256 Opt_mount_timeout,
257 Opt_osd_idle_ttl,
258 Opt_osd_request_timeout,
259 /* int args above */
260 Opt_fsid,
261 Opt_name,
262 Opt_secret,
263 Opt_key,
264 Opt_ip,
265 Opt_crush_location,
266 Opt_read_from_replica,
267 Opt_ms_mode,
268 /* string args above */
269 Opt_share,
270 Opt_crc,
271 Opt_cephx_require_signatures,
272 Opt_cephx_sign_messages,
273 Opt_tcp_nodelay,
274 Opt_abort_on_full,
275 };
276
277 enum {
278 Opt_read_from_replica_no,
279 Opt_read_from_replica_balance,
280 Opt_read_from_replica_localize,
281 };
282
283 static const struct constant_table ceph_param_read_from_replica[] = {
284 {"no", Opt_read_from_replica_no},
285 {"balance", Opt_read_from_replica_balance},
286 {"localize", Opt_read_from_replica_localize},
287 {}
288 };
289
290 enum ceph_ms_mode {
291 Opt_ms_mode_legacy,
292 Opt_ms_mode_crc,
293 Opt_ms_mode_secure,
294 Opt_ms_mode_prefer_crc,
295 Opt_ms_mode_prefer_secure
296 };
297
298 static const struct constant_table ceph_param_ms_mode[] = {
299 {"legacy", Opt_ms_mode_legacy},
300 {"crc", Opt_ms_mode_crc},
301 {"secure", Opt_ms_mode_secure},
302 {"prefer-crc", Opt_ms_mode_prefer_crc},
303 {"prefer-secure", Opt_ms_mode_prefer_secure},
304 {}
305 };
306
307 static const struct fs_parameter_spec ceph_parameters[] = {
308 fsparam_flag ("abort_on_full", Opt_abort_on_full),
309 __fsparam (NULL, "cephx_require_signatures", Opt_cephx_require_signatures,
310 fs_param_neg_with_no|fs_param_deprecated, NULL),
311 fsparam_flag_no ("cephx_sign_messages", Opt_cephx_sign_messages),
312 fsparam_flag_no ("crc", Opt_crc),
313 fsparam_string ("crush_location", Opt_crush_location),
314 fsparam_string ("fsid", Opt_fsid),
315 fsparam_string ("ip", Opt_ip),
316 fsparam_string ("key", Opt_key),
317 fsparam_u32 ("mount_timeout", Opt_mount_timeout),
318 fsparam_string ("name", Opt_name),
319 fsparam_u32 ("osd_idle_ttl", Opt_osd_idle_ttl),
320 fsparam_u32 ("osd_request_timeout", Opt_osd_request_timeout),
321 fsparam_u32 ("osdkeepalive", Opt_osdkeepalivetimeout),
322 fsparam_enum ("read_from_replica", Opt_read_from_replica,
323 ceph_param_read_from_replica),
324 fsparam_enum ("ms_mode", Opt_ms_mode,
325 ceph_param_ms_mode),
326 fsparam_string ("secret", Opt_secret),
327 fsparam_flag_no ("share", Opt_share),
328 fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay),
329 {}
330 };
331
ceph_alloc_options(void)332 struct ceph_options *ceph_alloc_options(void)
333 {
334 struct ceph_options *opt;
335
336 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
337 if (!opt)
338 return NULL;
339
340 opt->crush_locs = RB_ROOT;
341 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
342 GFP_KERNEL);
343 if (!opt->mon_addr) {
344 kfree(opt);
345 return NULL;
346 }
347
348 opt->flags = CEPH_OPT_DEFAULT;
349 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
350 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
351 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
352 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
353 opt->read_from_replica = CEPH_READ_FROM_REPLICA_DEFAULT;
354 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
355 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
356 return opt;
357 }
358 EXPORT_SYMBOL(ceph_alloc_options);
359
ceph_destroy_options(struct ceph_options * opt)360 void ceph_destroy_options(struct ceph_options *opt)
361 {
362 dout("destroy_options %p\n", opt);
363 if (!opt)
364 return;
365
366 ceph_clear_crush_locs(&opt->crush_locs);
367 kfree(opt->name);
368 if (opt->key) {
369 ceph_crypto_key_destroy(opt->key);
370 kfree(opt->key);
371 }
372 kfree(opt->mon_addr);
373 kfree(opt);
374 }
375 EXPORT_SYMBOL(ceph_destroy_options);
376
377 /* get secret from key store */
get_secret(struct ceph_crypto_key * dst,const char * name,struct p_log * log)378 static int get_secret(struct ceph_crypto_key *dst, const char *name,
379 struct p_log *log)
380 {
381 struct key *ukey;
382 int key_err;
383 int err = 0;
384 struct ceph_crypto_key *ckey;
385
386 ukey = request_key(&key_type_ceph, name, NULL);
387 if (IS_ERR(ukey)) {
388 /* request_key errors don't map nicely to mount(2)
389 errors; don't even try, but still printk */
390 key_err = PTR_ERR(ukey);
391 switch (key_err) {
392 case -ENOKEY:
393 error_plog(log, "Failed due to key not found: %s",
394 name);
395 break;
396 case -EKEYEXPIRED:
397 error_plog(log, "Failed due to expired key: %s",
398 name);
399 break;
400 case -EKEYREVOKED:
401 error_plog(log, "Failed due to revoked key: %s",
402 name);
403 break;
404 default:
405 error_plog(log, "Failed due to key error %d: %s",
406 key_err, name);
407 }
408 err = -EPERM;
409 goto out;
410 }
411
412 ckey = ukey->payload.data[0];
413 err = ceph_crypto_key_clone(dst, ckey);
414 if (err)
415 goto out_key;
416 /* pass through, err is 0 */
417
418 out_key:
419 key_put(ukey);
420 out:
421 return err;
422 }
423
ceph_parse_mon_ips(const char * buf,size_t len,struct ceph_options * opt,struct fc_log * l)424 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
425 struct fc_log *l)
426 {
427 struct p_log log = {.prefix = "libceph", .log = l};
428 int ret;
429
430 /* ip1[:port1][,ip2[:port2]...] */
431 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
432 &opt->num_mon);
433 if (ret) {
434 error_plog(&log, "Failed to parse monitor IPs: %d", ret);
435 return ret;
436 }
437
438 return 0;
439 }
440 EXPORT_SYMBOL(ceph_parse_mon_ips);
441
ceph_parse_param(struct fs_parameter * param,struct ceph_options * opt,struct fc_log * l)442 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
443 struct fc_log *l)
444 {
445 struct fs_parse_result result;
446 int token, err;
447 struct p_log log = {.prefix = "libceph", .log = l};
448
449 token = __fs_parse(&log, ceph_parameters, param, &result);
450 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
451 if (token < 0)
452 return token;
453
454 switch (token) {
455 case Opt_ip:
456 err = ceph_parse_ips(param->string,
457 param->string + param->size,
458 &opt->my_addr,
459 1, NULL);
460 if (err) {
461 error_plog(&log, "Failed to parse ip: %d", err);
462 return err;
463 }
464 opt->flags |= CEPH_OPT_MYIP;
465 break;
466
467 case Opt_fsid:
468 err = parse_fsid(param->string, &opt->fsid);
469 if (err) {
470 error_plog(&log, "Failed to parse fsid: %d", err);
471 return err;
472 }
473 opt->flags |= CEPH_OPT_FSID;
474 break;
475 case Opt_name:
476 kfree(opt->name);
477 opt->name = param->string;
478 param->string = NULL;
479 break;
480 case Opt_secret:
481 ceph_crypto_key_destroy(opt->key);
482 kfree(opt->key);
483
484 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
485 if (!opt->key)
486 return -ENOMEM;
487 err = ceph_crypto_key_unarmor(opt->key, param->string);
488 if (err) {
489 error_plog(&log, "Failed to parse secret: %d", err);
490 return err;
491 }
492 break;
493 case Opt_key:
494 ceph_crypto_key_destroy(opt->key);
495 kfree(opt->key);
496
497 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
498 if (!opt->key)
499 return -ENOMEM;
500 return get_secret(opt->key, param->string, &log);
501 case Opt_crush_location:
502 ceph_clear_crush_locs(&opt->crush_locs);
503 err = ceph_parse_crush_location(param->string,
504 &opt->crush_locs);
505 if (err) {
506 error_plog(&log, "Failed to parse CRUSH location: %d",
507 err);
508 return err;
509 }
510 break;
511 case Opt_read_from_replica:
512 switch (result.uint_32) {
513 case Opt_read_from_replica_no:
514 opt->read_from_replica = 0;
515 break;
516 case Opt_read_from_replica_balance:
517 opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS;
518 break;
519 case Opt_read_from_replica_localize:
520 opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS;
521 break;
522 default:
523 BUG();
524 }
525 break;
526 case Opt_ms_mode:
527 switch (result.uint_32) {
528 case Opt_ms_mode_legacy:
529 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
530 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
531 break;
532 case Opt_ms_mode_crc:
533 opt->con_modes[0] = CEPH_CON_MODE_CRC;
534 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
535 break;
536 case Opt_ms_mode_secure:
537 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
538 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
539 break;
540 case Opt_ms_mode_prefer_crc:
541 opt->con_modes[0] = CEPH_CON_MODE_CRC;
542 opt->con_modes[1] = CEPH_CON_MODE_SECURE;
543 break;
544 case Opt_ms_mode_prefer_secure:
545 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
546 opt->con_modes[1] = CEPH_CON_MODE_CRC;
547 break;
548 default:
549 BUG();
550 }
551 break;
552
553 case Opt_osdkeepalivetimeout:
554 /* 0 isn't well defined right now, reject it */
555 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
556 goto out_of_range;
557 opt->osd_keepalive_timeout =
558 msecs_to_jiffies(result.uint_32 * 1000);
559 break;
560 case Opt_osd_idle_ttl:
561 /* 0 isn't well defined right now, reject it */
562 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
563 goto out_of_range;
564 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
565 break;
566 case Opt_mount_timeout:
567 /* 0 is "wait forever" (i.e. infinite timeout) */
568 if (result.uint_32 > INT_MAX / 1000)
569 goto out_of_range;
570 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
571 break;
572 case Opt_osd_request_timeout:
573 /* 0 is "wait forever" (i.e. infinite timeout) */
574 if (result.uint_32 > INT_MAX / 1000)
575 goto out_of_range;
576 opt->osd_request_timeout =
577 msecs_to_jiffies(result.uint_32 * 1000);
578 break;
579
580 case Opt_share:
581 if (!result.negated)
582 opt->flags &= ~CEPH_OPT_NOSHARE;
583 else
584 opt->flags |= CEPH_OPT_NOSHARE;
585 break;
586 case Opt_crc:
587 if (!result.negated)
588 opt->flags &= ~CEPH_OPT_NOCRC;
589 else
590 opt->flags |= CEPH_OPT_NOCRC;
591 break;
592 case Opt_cephx_require_signatures:
593 if (!result.negated)
594 warn_plog(&log, "Ignoring cephx_require_signatures");
595 else
596 warn_plog(&log, "Ignoring nocephx_require_signatures, use nocephx_sign_messages");
597 break;
598 case Opt_cephx_sign_messages:
599 if (!result.negated)
600 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
601 else
602 opt->flags |= CEPH_OPT_NOMSGSIGN;
603 break;
604 case Opt_tcp_nodelay:
605 if (!result.negated)
606 opt->flags |= CEPH_OPT_TCP_NODELAY;
607 else
608 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
609 break;
610
611 case Opt_abort_on_full:
612 opt->flags |= CEPH_OPT_ABORT_ON_FULL;
613 break;
614
615 default:
616 BUG();
617 }
618
619 return 0;
620
621 out_of_range:
622 return inval_plog(&log, "%s out of range", param->key);
623 }
624 EXPORT_SYMBOL(ceph_parse_param);
625
ceph_print_client_options(struct seq_file * m,struct ceph_client * client,bool show_all)626 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
627 bool show_all)
628 {
629 struct ceph_options *opt = client->options;
630 size_t pos = m->count;
631 struct rb_node *n;
632
633 if (opt->name) {
634 seq_puts(m, "name=");
635 seq_escape(m, opt->name, ", \t\n\\");
636 seq_putc(m, ',');
637 }
638 if (opt->key)
639 seq_puts(m, "secret=<hidden>,");
640
641 if (!RB_EMPTY_ROOT(&opt->crush_locs)) {
642 seq_puts(m, "crush_location=");
643 for (n = rb_first(&opt->crush_locs); ; ) {
644 struct crush_loc_node *loc =
645 rb_entry(n, struct crush_loc_node, cl_node);
646
647 seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name,
648 loc->cl_loc.cl_name);
649 n = rb_next(n);
650 if (!n)
651 break;
652
653 seq_putc(m, '|');
654 }
655 seq_putc(m, ',');
656 }
657 if (opt->read_from_replica == CEPH_OSD_FLAG_BALANCE_READS) {
658 seq_puts(m, "read_from_replica=balance,");
659 } else if (opt->read_from_replica == CEPH_OSD_FLAG_LOCALIZE_READS) {
660 seq_puts(m, "read_from_replica=localize,");
661 }
662 if (opt->con_modes[0] != CEPH_CON_MODE_UNKNOWN) {
663 if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
664 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
665 seq_puts(m, "ms_mode=crc,");
666 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
667 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
668 seq_puts(m, "ms_mode=secure,");
669 } else if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
670 opt->con_modes[1] == CEPH_CON_MODE_SECURE) {
671 seq_puts(m, "ms_mode=prefer-crc,");
672 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
673 opt->con_modes[1] == CEPH_CON_MODE_CRC) {
674 seq_puts(m, "ms_mode=prefer-secure,");
675 }
676 }
677
678 if (opt->flags & CEPH_OPT_FSID)
679 seq_printf(m, "fsid=%pU,", &opt->fsid);
680 if (opt->flags & CEPH_OPT_NOSHARE)
681 seq_puts(m, "noshare,");
682 if (opt->flags & CEPH_OPT_NOCRC)
683 seq_puts(m, "nocrc,");
684 if (opt->flags & CEPH_OPT_NOMSGSIGN)
685 seq_puts(m, "nocephx_sign_messages,");
686 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
687 seq_puts(m, "notcp_nodelay,");
688 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL))
689 seq_puts(m, "abort_on_full,");
690
691 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
692 seq_printf(m, "mount_timeout=%d,",
693 jiffies_to_msecs(opt->mount_timeout) / 1000);
694 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
695 seq_printf(m, "osd_idle_ttl=%d,",
696 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
697 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
698 seq_printf(m, "osdkeepalivetimeout=%d,",
699 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
700 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
701 seq_printf(m, "osd_request_timeout=%d,",
702 jiffies_to_msecs(opt->osd_request_timeout) / 1000);
703
704 /* drop redundant comma */
705 if (m->count != pos)
706 m->count--;
707
708 return 0;
709 }
710 EXPORT_SYMBOL(ceph_print_client_options);
711
ceph_client_addr(struct ceph_client * client)712 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
713 {
714 return &client->msgr.inst.addr;
715 }
716 EXPORT_SYMBOL(ceph_client_addr);
717
ceph_client_gid(struct ceph_client * client)718 u64 ceph_client_gid(struct ceph_client *client)
719 {
720 return client->monc.auth->global_id;
721 }
722 EXPORT_SYMBOL(ceph_client_gid);
723
724 /*
725 * create a fresh client instance
726 */
ceph_create_client(struct ceph_options * opt,void * private)727 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
728 {
729 struct ceph_client *client;
730 struct ceph_entity_addr *myaddr = NULL;
731 int err;
732
733 err = wait_for_random_bytes();
734 if (err < 0)
735 return ERR_PTR(err);
736
737 client = kzalloc(sizeof(*client), GFP_KERNEL);
738 if (client == NULL)
739 return ERR_PTR(-ENOMEM);
740
741 client->private = private;
742 client->options = opt;
743
744 mutex_init(&client->mount_mutex);
745 init_waitqueue_head(&client->auth_wq);
746 client->auth_err = 0;
747
748 client->extra_mon_dispatch = NULL;
749 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
750 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
751
752 if (!ceph_test_opt(client, NOMSGSIGN))
753 client->required_features |= CEPH_FEATURE_MSG_AUTH;
754
755 /* msgr */
756 if (ceph_test_opt(client, MYIP))
757 myaddr = &client->options->my_addr;
758
759 ceph_messenger_init(&client->msgr, myaddr);
760
761 /* subsystems */
762 err = ceph_monc_init(&client->monc, client);
763 if (err < 0)
764 goto fail;
765 err = ceph_osdc_init(&client->osdc, client);
766 if (err < 0)
767 goto fail_monc;
768
769 return client;
770
771 fail_monc:
772 ceph_monc_stop(&client->monc);
773 fail:
774 ceph_messenger_fini(&client->msgr);
775 kfree(client);
776 return ERR_PTR(err);
777 }
778 EXPORT_SYMBOL(ceph_create_client);
779
ceph_destroy_client(struct ceph_client * client)780 void ceph_destroy_client(struct ceph_client *client)
781 {
782 dout("destroy_client %p\n", client);
783
784 atomic_set(&client->msgr.stopping, 1);
785
786 /* unmount */
787 ceph_osdc_stop(&client->osdc);
788 ceph_monc_stop(&client->monc);
789 ceph_messenger_fini(&client->msgr);
790
791 ceph_debugfs_client_cleanup(client);
792
793 ceph_destroy_options(client->options);
794
795 kfree(client);
796 dout("destroy_client %p done\n", client);
797 }
798 EXPORT_SYMBOL(ceph_destroy_client);
799
ceph_reset_client_addr(struct ceph_client * client)800 void ceph_reset_client_addr(struct ceph_client *client)
801 {
802 ceph_messenger_reset_nonce(&client->msgr);
803 ceph_monc_reopen_session(&client->monc);
804 ceph_osdc_reopen_osds(&client->osdc);
805 }
806 EXPORT_SYMBOL(ceph_reset_client_addr);
807
808 /*
809 * true if we have the mon map (and have thus joined the cluster)
810 */
have_mon_and_osd_map(struct ceph_client * client)811 static bool have_mon_and_osd_map(struct ceph_client *client)
812 {
813 return client->monc.monmap && client->monc.monmap->epoch &&
814 client->osdc.osdmap && client->osdc.osdmap->epoch;
815 }
816
817 /*
818 * mount: join the ceph cluster, and open root directory.
819 */
__ceph_open_session(struct ceph_client * client,unsigned long started)820 int __ceph_open_session(struct ceph_client *client, unsigned long started)
821 {
822 unsigned long timeout = client->options->mount_timeout;
823 long err;
824
825 /* open session, and wait for mon and osd maps */
826 err = ceph_monc_open_session(&client->monc);
827 if (err < 0)
828 return err;
829
830 while (!have_mon_and_osd_map(client)) {
831 if (timeout && time_after_eq(jiffies, started + timeout))
832 return -ETIMEDOUT;
833
834 /* wait */
835 dout("mount waiting for mon_map\n");
836 err = wait_event_interruptible_timeout(client->auth_wq,
837 have_mon_and_osd_map(client) || (client->auth_err < 0),
838 ceph_timeout_jiffies(timeout));
839 if (err < 0)
840 return err;
841 if (client->auth_err < 0)
842 return client->auth_err;
843 }
844
845 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
846 &client->fsid);
847 ceph_debugfs_client_init(client);
848
849 return 0;
850 }
851 EXPORT_SYMBOL(__ceph_open_session);
852
ceph_open_session(struct ceph_client * client)853 int ceph_open_session(struct ceph_client *client)
854 {
855 int ret;
856 unsigned long started = jiffies; /* note the start time */
857
858 dout("open_session start\n");
859 mutex_lock(&client->mount_mutex);
860
861 ret = __ceph_open_session(client, started);
862
863 mutex_unlock(&client->mount_mutex);
864 return ret;
865 }
866 EXPORT_SYMBOL(ceph_open_session);
867
ceph_wait_for_latest_osdmap(struct ceph_client * client,unsigned long timeout)868 int ceph_wait_for_latest_osdmap(struct ceph_client *client,
869 unsigned long timeout)
870 {
871 u64 newest_epoch;
872 int ret;
873
874 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
875 if (ret)
876 return ret;
877
878 if (client->osdc.osdmap->epoch >= newest_epoch)
879 return 0;
880
881 ceph_osdc_maybe_request_map(&client->osdc);
882 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
883 }
884 EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
885
init_ceph_lib(void)886 static int __init init_ceph_lib(void)
887 {
888 int ret = 0;
889
890 ceph_debugfs_init();
891
892 ret = ceph_crypto_init();
893 if (ret < 0)
894 goto out_debugfs;
895
896 ret = ceph_msgr_init();
897 if (ret < 0)
898 goto out_crypto;
899
900 ret = ceph_osdc_setup();
901 if (ret < 0)
902 goto out_msgr;
903
904 pr_info("loaded (mon/osd proto %d/%d)\n",
905 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
906
907 return 0;
908
909 out_msgr:
910 ceph_msgr_exit();
911 out_crypto:
912 ceph_crypto_shutdown();
913 out_debugfs:
914 ceph_debugfs_cleanup();
915 return ret;
916 }
917
exit_ceph_lib(void)918 static void __exit exit_ceph_lib(void)
919 {
920 dout("exit_ceph_lib\n");
921 WARN_ON(!ceph_strings_empty());
922
923 ceph_osdc_cleanup();
924 ceph_msgr_exit();
925 ceph_crypto_shutdown();
926 ceph_debugfs_cleanup();
927 }
928
929 module_init(init_ceph_lib);
930 module_exit(exit_ceph_lib);
931
932 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
933 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
934 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
935 MODULE_DESCRIPTION("Ceph core library");
936 MODULE_LICENSE("GPL");
937