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Merge tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[linux/fpc-iii.git] / net / ceph / ceph_common.c
blob271287c5ec12d5fb7130e1e9da179bc34ae0bac9
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 */
44 bool libceph_compatible(void *data)
45 {
46 return true;
47 }
48 EXPORT_SYMBOL(libceph_compatible);
49
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, &param_ops_supported_features, NULL,
59 0444);
60
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 */
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
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
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 */
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
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_osdtimeout,
256 Opt_osdkeepalivetimeout,
257 Opt_mount_timeout,
258 Opt_osd_idle_ttl,
259 Opt_osd_request_timeout,
260 /* int args above */
261 Opt_fsid,
262 Opt_name,
263 Opt_secret,
264 Opt_key,
265 Opt_ip,
266 Opt_crush_location,
267 Opt_read_from_replica,
268 Opt_ms_mode,
269 /* string args above */
270 Opt_share,
271 Opt_crc,
272 Opt_cephx_require_signatures,
273 Opt_cephx_sign_messages,
274 Opt_tcp_nodelay,
275 Opt_abort_on_full,
276 };
277
278 enum {
279 Opt_read_from_replica_no,
280 Opt_read_from_replica_balance,
281 Opt_read_from_replica_localize,
282 };
283
284 static const struct constant_table ceph_param_read_from_replica[] = {
285 {"no", Opt_read_from_replica_no},
286 {"balance", Opt_read_from_replica_balance},
287 {"localize", Opt_read_from_replica_localize},
288 {}
289 };
290
291 enum ceph_ms_mode {
292 Opt_ms_mode_legacy,
293 Opt_ms_mode_crc,
294 Opt_ms_mode_secure,
295 Opt_ms_mode_prefer_crc,
296 Opt_ms_mode_prefer_secure
297 };
298
299 static const struct constant_table ceph_param_ms_mode[] = {
300 {"legacy", Opt_ms_mode_legacy},
301 {"crc", Opt_ms_mode_crc},
302 {"secure", Opt_ms_mode_secure},
303 {"prefer-crc", Opt_ms_mode_prefer_crc},
304 {"prefer-secure", Opt_ms_mode_prefer_secure},
305 {}
306 };
307
308 static const struct fs_parameter_spec ceph_parameters[] = {
309 fsparam_flag ("abort_on_full", Opt_abort_on_full),
310 fsparam_flag_no ("cephx_require_signatures", Opt_cephx_require_signatures),
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 (fs_param_is_s32, "osdtimeout", Opt_osdtimeout,
323 fs_param_deprecated, NULL),
324 fsparam_enum ("read_from_replica", Opt_read_from_replica,
325 ceph_param_read_from_replica),
326 fsparam_enum ("ms_mode", Opt_ms_mode,
327 ceph_param_ms_mode),
328 fsparam_string ("secret", Opt_secret),
329 fsparam_flag_no ("share", Opt_share),
330 fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay),
331 {}
332 };
333
334 struct ceph_options *ceph_alloc_options(void)
335 {
336 struct ceph_options *opt;
337
338 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
339 if (!opt)
340 return NULL;
341
342 opt->crush_locs = RB_ROOT;
343 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
344 GFP_KERNEL);
345 if (!opt->mon_addr) {
346 kfree(opt);
347 return NULL;
348 }
349
350 opt->flags = CEPH_OPT_DEFAULT;
351 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
352 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
353 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
354 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
355 opt->read_from_replica = CEPH_READ_FROM_REPLICA_DEFAULT;
356 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
357 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
358 return opt;
359 }
360 EXPORT_SYMBOL(ceph_alloc_options);
361
362 void ceph_destroy_options(struct ceph_options *opt)
363 {
364 dout("destroy_options %p\n", opt);
365 if (!opt)
366 return;
367
368 ceph_clear_crush_locs(&opt->crush_locs);
369 kfree(opt->name);
370 if (opt->key) {
371 ceph_crypto_key_destroy(opt->key);
372 kfree(opt->key);
373 }
374 kfree(opt->mon_addr);
375 kfree(opt);
376 }
377 EXPORT_SYMBOL(ceph_destroy_options);
378
379 /* get secret from key store */
380 static int get_secret(struct ceph_crypto_key *dst, const char *name,
381 struct p_log *log)
382 {
383 struct key *ukey;
384 int key_err;
385 int err = 0;
386 struct ceph_crypto_key *ckey;
387
388 ukey = request_key(&key_type_ceph, name, NULL);
389 if (IS_ERR(ukey)) {
390 /* request_key errors don't map nicely to mount(2)
391 errors; don't even try, but still printk */
392 key_err = PTR_ERR(ukey);
393 switch (key_err) {
394 case -ENOKEY:
395 error_plog(log, "Failed due to key not found: %s",
396 name);
397 break;
398 case -EKEYEXPIRED:
399 error_plog(log, "Failed due to expired key: %s",
400 name);
401 break;
402 case -EKEYREVOKED:
403 error_plog(log, "Failed due to revoked key: %s",
404 name);
405 break;
406 default:
407 error_plog(log, "Failed due to key error %d: %s",
408 key_err, name);
409 }
410 err = -EPERM;
411 goto out;
412 }
413
414 ckey = ukey->payload.data[0];
415 err = ceph_crypto_key_clone(dst, ckey);
416 if (err)
417 goto out_key;
418 /* pass through, err is 0 */
419
420 out_key:
421 key_put(ukey);
422 out:
423 return err;
424 }
425
426 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
427 struct fc_log *l)
428 {
429 struct p_log log = {.prefix = "libceph", .log = l};
430 int ret;
431
432 /* ip1[:port1][,ip2[:port2]...] */
433 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
434 &opt->num_mon);
435 if (ret) {
436 error_plog(&log, "Failed to parse monitor IPs: %d", ret);
437 return ret;
438 }
439
440 return 0;
441 }
442 EXPORT_SYMBOL(ceph_parse_mon_ips);
443
444 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
445 struct fc_log *l)
446 {
447 struct fs_parse_result result;
448 int token, err;
449 struct p_log log = {.prefix = "libceph", .log = l};
450
451 token = __fs_parse(&log, ceph_parameters, param, &result);
452 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
453 if (token < 0)
454 return token;
455
456 switch (token) {
457 case Opt_ip:
458 err = ceph_parse_ips(param->string,
459 param->string + param->size,
460 &opt->my_addr,
461 1, NULL);
462 if (err) {
463 error_plog(&log, "Failed to parse ip: %d", err);
464 return err;
465 }
466 opt->flags |= CEPH_OPT_MYIP;
467 break;
468
469 case Opt_fsid:
470 err = parse_fsid(param->string, &opt->fsid);
471 if (err) {
472 error_plog(&log, "Failed to parse fsid: %d", err);
473 return err;
474 }
475 opt->flags |= CEPH_OPT_FSID;
476 break;
477 case Opt_name:
478 kfree(opt->name);
479 opt->name = param->string;
480 param->string = NULL;
481 break;
482 case Opt_secret:
483 ceph_crypto_key_destroy(opt->key);
484 kfree(opt->key);
485
486 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
487 if (!opt->key)
488 return -ENOMEM;
489 err = ceph_crypto_key_unarmor(opt->key, param->string);
490 if (err) {
491 error_plog(&log, "Failed to parse secret: %d", err);
492 return err;
493 }
494 break;
495 case Opt_key:
496 ceph_crypto_key_destroy(opt->key);
497 kfree(opt->key);
498
499 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
500 if (!opt->key)
501 return -ENOMEM;
502 return get_secret(opt->key, param->string, &log);
503 case Opt_crush_location:
504 ceph_clear_crush_locs(&opt->crush_locs);
505 err = ceph_parse_crush_location(param->string,
506 &opt->crush_locs);
507 if (err) {
508 error_plog(&log, "Failed to parse CRUSH location: %d",
509 err);
510 return err;
511 }
512 break;
513 case Opt_read_from_replica:
514 switch (result.uint_32) {
515 case Opt_read_from_replica_no:
516 opt->read_from_replica = 0;
517 break;
518 case Opt_read_from_replica_balance:
519 opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS;
520 break;
521 case Opt_read_from_replica_localize:
522 opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS;
523 break;
524 default:
525 BUG();
526 }
527 break;
528 case Opt_ms_mode:
529 switch (result.uint_32) {
530 case Opt_ms_mode_legacy:
531 opt->con_modes[0] = CEPH_CON_MODE_UNKNOWN;
532 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
533 break;
534 case Opt_ms_mode_crc:
535 opt->con_modes[0] = CEPH_CON_MODE_CRC;
536 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
537 break;
538 case Opt_ms_mode_secure:
539 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
540 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
541 break;
542 case Opt_ms_mode_prefer_crc:
543 opt->con_modes[0] = CEPH_CON_MODE_CRC;
544 opt->con_modes[1] = CEPH_CON_MODE_SECURE;
545 break;
546 case Opt_ms_mode_prefer_secure:
547 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
548 opt->con_modes[1] = CEPH_CON_MODE_CRC;
549 break;
550 default:
551 BUG();
552 }
553 break;
554
555 case Opt_osdtimeout:
556 warn_plog(&log, "Ignoring osdtimeout");
557 break;
558 case Opt_osdkeepalivetimeout:
559 /* 0 isn't well defined right now, reject it */
560 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
561 goto out_of_range;
562 opt->osd_keepalive_timeout =
563 msecs_to_jiffies(result.uint_32 * 1000);
564 break;
565 case Opt_osd_idle_ttl:
566 /* 0 isn't well defined right now, reject it */
567 if (result.uint_32 < 1 || result.uint_32 > INT_MAX / 1000)
568 goto out_of_range;
569 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
570 break;
571 case Opt_mount_timeout:
572 /* 0 is "wait forever" (i.e. infinite timeout) */
573 if (result.uint_32 > INT_MAX / 1000)
574 goto out_of_range;
575 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
576 break;
577 case Opt_osd_request_timeout:
578 /* 0 is "wait forever" (i.e. infinite timeout) */
579 if (result.uint_32 > INT_MAX / 1000)
580 goto out_of_range;
581 opt->osd_request_timeout =
582 msecs_to_jiffies(result.uint_32 * 1000);
583 break;
584
585 case Opt_share:
586 if (!result.negated)
587 opt->flags &= ~CEPH_OPT_NOSHARE;
588 else
589 opt->flags |= CEPH_OPT_NOSHARE;
590 break;
591 case Opt_crc:
592 if (!result.negated)
593 opt->flags &= ~CEPH_OPT_NOCRC;
594 else
595 opt->flags |= CEPH_OPT_NOCRC;
596 break;
597 case Opt_cephx_require_signatures:
598 if (!result.negated)
599 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
600 else
601 opt->flags |= CEPH_OPT_NOMSGAUTH;
602 break;
603 case Opt_cephx_sign_messages:
604 if (!result.negated)
605 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
606 else
607 opt->flags |= CEPH_OPT_NOMSGSIGN;
608 break;
609 case Opt_tcp_nodelay:
610 if (!result.negated)
611 opt->flags |= CEPH_OPT_TCP_NODELAY;
612 else
613 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
614 break;
615
616 case Opt_abort_on_full:
617 opt->flags |= CEPH_OPT_ABORT_ON_FULL;
618 break;
619
620 default:
621 BUG();
622 }
623
624 return 0;
625
626 out_of_range:
627 return inval_plog(&log, "%s out of range", param->key);
628 }
629 EXPORT_SYMBOL(ceph_parse_param);
630
631 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
632 bool show_all)
633 {
634 struct ceph_options *opt = client->options;
635 size_t pos = m->count;
636 struct rb_node *n;
637
638 if (opt->name) {
639 seq_puts(m, "name=");
640 seq_escape(m, opt->name, ", \t\n\\");
641 seq_putc(m, ',');
642 }
643 if (opt->key)
644 seq_puts(m, "secret=<hidden>,");
645
646 if (!RB_EMPTY_ROOT(&opt->crush_locs)) {
647 seq_puts(m, "crush_location=");
648 for (n = rb_first(&opt->crush_locs); ; ) {
649 struct crush_loc_node *loc =
650 rb_entry(n, struct crush_loc_node, cl_node);
651
652 seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name,
653 loc->cl_loc.cl_name);
654 n = rb_next(n);
655 if (!n)
656 break;
657
658 seq_putc(m, '|');
659 }
660 seq_putc(m, ',');
661 }
662 if (opt->read_from_replica == CEPH_OSD_FLAG_BALANCE_READS) {
663 seq_puts(m, "read_from_replica=balance,");
664 } else if (opt->read_from_replica == CEPH_OSD_FLAG_LOCALIZE_READS) {
665 seq_puts(m, "read_from_replica=localize,");
666 }
667 if (opt->con_modes[0] != CEPH_CON_MODE_UNKNOWN) {
668 if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
669 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
670 seq_puts(m, "ms_mode=crc,");
671 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
672 opt->con_modes[1] == CEPH_CON_MODE_UNKNOWN) {
673 seq_puts(m, "ms_mode=secure,");
674 } else if (opt->con_modes[0] == CEPH_CON_MODE_CRC &&
675 opt->con_modes[1] == CEPH_CON_MODE_SECURE) {
676 seq_puts(m, "ms_mode=prefer-crc,");
677 } else if (opt->con_modes[0] == CEPH_CON_MODE_SECURE &&
678 opt->con_modes[1] == CEPH_CON_MODE_CRC) {
679 seq_puts(m, "ms_mode=prefer-secure,");
680 }
681 }
682
683 if (opt->flags & CEPH_OPT_FSID)
684 seq_printf(m, "fsid=%pU,", &opt->fsid);
685 if (opt->flags & CEPH_OPT_NOSHARE)
686 seq_puts(m, "noshare,");
687 if (opt->flags & CEPH_OPT_NOCRC)
688 seq_puts(m, "nocrc,");
689 if (opt->flags & CEPH_OPT_NOMSGAUTH)
690 seq_puts(m, "nocephx_require_signatures,");
691 if (opt->flags & CEPH_OPT_NOMSGSIGN)
692 seq_puts(m, "nocephx_sign_messages,");
693 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
694 seq_puts(m, "notcp_nodelay,");
695 if (show_all && (opt->flags & CEPH_OPT_ABORT_ON_FULL))
696 seq_puts(m, "abort_on_full,");
697
698 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
699 seq_printf(m, "mount_timeout=%d,",
700 jiffies_to_msecs(opt->mount_timeout) / 1000);
701 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
702 seq_printf(m, "osd_idle_ttl=%d,",
703 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
704 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
705 seq_printf(m, "osdkeepalivetimeout=%d,",
706 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
707 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
708 seq_printf(m, "osd_request_timeout=%d,",
709 jiffies_to_msecs(opt->osd_request_timeout) / 1000);
710
711 /* drop redundant comma */
712 if (m->count != pos)
713 m->count--;
714
715 return 0;
716 }
717 EXPORT_SYMBOL(ceph_print_client_options);
718
719 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
720 {
721 return &client->msgr.inst.addr;
722 }
723 EXPORT_SYMBOL(ceph_client_addr);
724
725 u64 ceph_client_gid(struct ceph_client *client)
726 {
727 return client->monc.auth->global_id;
728 }
729 EXPORT_SYMBOL(ceph_client_gid);
730
731 /*
732 * create a fresh client instance
733 */
734 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
735 {
736 struct ceph_client *client;
737 struct ceph_entity_addr *myaddr = NULL;
738 int err;
739
740 err = wait_for_random_bytes();
741 if (err < 0)
742 return ERR_PTR(err);
743
744 client = kzalloc(sizeof(*client), GFP_KERNEL);
745 if (client == NULL)
746 return ERR_PTR(-ENOMEM);
747
748 client->private = private;
749 client->options = opt;
750
751 mutex_init(&client->mount_mutex);
752 init_waitqueue_head(&client->auth_wq);
753 client->auth_err = 0;
754
755 client->extra_mon_dispatch = NULL;
756 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
757 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
758
759 if (!ceph_test_opt(client, NOMSGAUTH))
760 client->required_features |= CEPH_FEATURE_MSG_AUTH;
761
762 /* msgr */
763 if (ceph_test_opt(client, MYIP))
764 myaddr = &client->options->my_addr;
765
766 ceph_messenger_init(&client->msgr, myaddr);
767
768 /* subsystems */
769 err = ceph_monc_init(&client->monc, client);
770 if (err < 0)
771 goto fail;
772 err = ceph_osdc_init(&client->osdc, client);
773 if (err < 0)
774 goto fail_monc;
775
776 return client;
777
778 fail_monc:
779 ceph_monc_stop(&client->monc);
780 fail:
781 ceph_messenger_fini(&client->msgr);
782 kfree(client);
783 return ERR_PTR(err);
784 }
785 EXPORT_SYMBOL(ceph_create_client);
786
787 void ceph_destroy_client(struct ceph_client *client)
788 {
789 dout("destroy_client %p\n", client);
790
791 atomic_set(&client->msgr.stopping, 1);
792
793 /* unmount */
794 ceph_osdc_stop(&client->osdc);
795 ceph_monc_stop(&client->monc);
796 ceph_messenger_fini(&client->msgr);
797
798 ceph_debugfs_client_cleanup(client);
799
800 ceph_destroy_options(client->options);
801
802 kfree(client);
803 dout("destroy_client %p done\n", client);
804 }
805 EXPORT_SYMBOL(ceph_destroy_client);
806
807 void ceph_reset_client_addr(struct ceph_client *client)
808 {
809 ceph_messenger_reset_nonce(&client->msgr);
810 ceph_monc_reopen_session(&client->monc);
811 ceph_osdc_reopen_osds(&client->osdc);
812 }
813 EXPORT_SYMBOL(ceph_reset_client_addr);
814
815 /*
816 * true if we have the mon map (and have thus joined the cluster)
817 */
818 static bool have_mon_and_osd_map(struct ceph_client *client)
819 {
820 return client->monc.monmap && client->monc.monmap->epoch &&
821 client->osdc.osdmap && client->osdc.osdmap->epoch;
822 }
823
824 /*
825 * mount: join the ceph cluster, and open root directory.
826 */
827 int __ceph_open_session(struct ceph_client *client, unsigned long started)
828 {
829 unsigned long timeout = client->options->mount_timeout;
830 long err;
831
832 /* open session, and wait for mon and osd maps */
833 err = ceph_monc_open_session(&client->monc);
834 if (err < 0)
835 return err;
836
837 while (!have_mon_and_osd_map(client)) {
838 if (timeout && time_after_eq(jiffies, started + timeout))
839 return -ETIMEDOUT;
840
841 /* wait */
842 dout("mount waiting for mon_map\n");
843 err = wait_event_interruptible_timeout(client->auth_wq,
844 have_mon_and_osd_map(client) || (client->auth_err < 0),
845 ceph_timeout_jiffies(timeout));
846 if (err < 0)
847 return err;
848 if (client->auth_err < 0)
849 return client->auth_err;
850 }
851
852 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
853 &client->fsid);
854 ceph_debugfs_client_init(client);
855
856 return 0;
857 }
858 EXPORT_SYMBOL(__ceph_open_session);
859
860 int ceph_open_session(struct ceph_client *client)
861 {
862 int ret;
863 unsigned long started = jiffies; /* note the start time */
864
865 dout("open_session start\n");
866 mutex_lock(&client->mount_mutex);
867
868 ret = __ceph_open_session(client, started);
869
870 mutex_unlock(&client->mount_mutex);
871 return ret;
872 }
873 EXPORT_SYMBOL(ceph_open_session);
874
875 int ceph_wait_for_latest_osdmap(struct ceph_client *client,
876 unsigned long timeout)
877 {
878 u64 newest_epoch;
879 int ret;
880
881 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
882 if (ret)
883 return ret;
884
885 if (client->osdc.osdmap->epoch >= newest_epoch)
886 return 0;
887
888 ceph_osdc_maybe_request_map(&client->osdc);
889 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
890 }
891 EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
892
893 static int __init init_ceph_lib(void)
894 {
895 int ret = 0;
896
897 ceph_debugfs_init();
898
899 ret = ceph_crypto_init();
900 if (ret < 0)
901 goto out_debugfs;
902
903 ret = ceph_msgr_init();
904 if (ret < 0)
905 goto out_crypto;
906
907 ret = ceph_osdc_setup();
908 if (ret < 0)
909 goto out_msgr;
910
911 pr_info("loaded (mon/osd proto %d/%d)\n",
912 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
913
914 return 0;
915
916 out_msgr:
917 ceph_msgr_exit();
918 out_crypto:
919 ceph_crypto_shutdown();
920 out_debugfs:
921 ceph_debugfs_cleanup();
922 return ret;
923 }
924
925 static void __exit exit_ceph_lib(void)
926 {
927 dout("exit_ceph_lib\n");
928 WARN_ON(!ceph_strings_empty());
929
930 ceph_osdc_cleanup();
931 ceph_msgr_exit();
932 ceph_crypto_shutdown();
933 ceph_debugfs_cleanup();
934 }
935
936 module_init(init_ceph_lib);
937 module_exit(exit_ceph_lib);
938
939 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
940 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
941 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
942 MODULE_DESCRIPTION("Ceph core library");
943 MODULE_LICENSE("GPL");
Linux with added FPC-III support