2 #include <linux/ceph/ceph_debug.h>
3 #include <linux/backing-dev.h>
4 #include <linux/ctype.h>
6 #include <linux/inet.h>
9 #include <keys/ceph-type.h>
10 #include <linux/module.h>
11 #include <linux/mount.h>
12 #include <linux/nsproxy.h>
13 #include <linux/parser.h>
14 #include <linux/sched.h>
15 #include <linux/seq_file.h>
16 #include <linux/slab.h>
17 #include <linux/statfs.h>
18 #include <linux/string.h>
19 #include <linux/vmalloc.h>
22 #include <linux/ceph/ceph_features.h>
23 #include <linux/ceph/libceph.h>
24 #include <linux/ceph/debugfs.h>
25 #include <linux/ceph/decode.h>
26 #include <linux/ceph/mon_client.h>
27 #include <linux/ceph/auth.h>
32 * Module compatibility interface. For now it doesn't do anything,
33 * but its existence signals a certain level of functionality.
35 * The data buffer is used to pass information both to and from
36 * libceph. The return value indicates whether libceph determines
37 * it is compatible with the caller (from another kernel module),
38 * given the provided data.
40 * The data pointer can be null.
42 bool libceph_compatible(void *data)
46 EXPORT_SYMBOL(libceph_compatible);
48 static int param_get_supported_features(char *buffer,
49 const struct kernel_param *kp)
51 return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
53 static const struct kernel_param_ops param_ops_supported_features = {
54 .get = param_get_supported_features,
56 module_param_cb(supported_features, ¶m_ops_supported_features, NULL,
59 const char *ceph_msg_type_name(int type)
62 case CEPH_MSG_SHUTDOWN: return "shutdown";
63 case CEPH_MSG_PING: return "ping";
64 case CEPH_MSG_AUTH: return "auth";
65 case CEPH_MSG_AUTH_REPLY: return "auth_reply";
66 case CEPH_MSG_MON_MAP: return "mon_map";
67 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
68 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
69 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
70 case CEPH_MSG_STATFS: return "statfs";
71 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
72 case CEPH_MSG_MON_GET_VERSION: return "mon_get_version";
73 case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
74 case CEPH_MSG_MDS_MAP: return "mds_map";
75 case CEPH_MSG_FS_MAP_USER: return "fs_map_user";
76 case CEPH_MSG_CLIENT_SESSION: return "client_session";
77 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
78 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
79 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
80 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
81 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
82 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
83 case CEPH_MSG_CLIENT_QUOTA: return "client_quota";
84 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
85 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
86 case CEPH_MSG_POOLOP_REPLY: return "poolop_reply";
87 case CEPH_MSG_POOLOP: return "poolop";
88 case CEPH_MSG_MON_COMMAND: return "mon_command";
89 case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack";
90 case CEPH_MSG_OSD_MAP: return "osd_map";
91 case CEPH_MSG_OSD_OP: return "osd_op";
92 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
93 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
94 case CEPH_MSG_OSD_BACKOFF: return "osd_backoff";
95 default: return "unknown";
98 EXPORT_SYMBOL(ceph_msg_type_name);
101 * Initially learn our fsid, or verify an fsid matches.
103 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
105 if (client->have_fsid) {
106 if (ceph_fsid_compare(&client->fsid, fsid)) {
107 pr_err("bad fsid, had %pU got %pU",
108 &client->fsid, fsid);
112 memcpy(&client->fsid, fsid, sizeof(*fsid));
116 EXPORT_SYMBOL(ceph_check_fsid);
118 static int strcmp_null(const char *s1, const char *s2)
126 return strcmp(s1, s2);
129 int ceph_compare_options(struct ceph_options *new_opt,
130 struct ceph_client *client)
132 struct ceph_options *opt1 = new_opt;
133 struct ceph_options *opt2 = client->options;
134 int ofs = offsetof(struct ceph_options, mon_addr);
139 * Don't bother comparing options if network namespaces don't
142 if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
145 ret = memcmp(opt1, opt2, ofs);
149 ret = strcmp_null(opt1->name, opt2->name);
153 if (opt1->key && !opt2->key)
155 if (!opt1->key && opt2->key)
157 if (opt1->key && opt2->key) {
158 if (opt1->key->type != opt2->key->type)
160 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
162 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
164 if (opt1->key->len != opt2->key->len)
166 if (opt1->key->key && !opt2->key->key)
168 if (!opt1->key->key && opt2->key->key)
170 if (opt1->key->key && opt2->key->key) {
171 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
177 /* any matching mon ip implies a match */
178 for (i = 0; i < opt1->num_mon; i++) {
179 if (ceph_monmap_contains(client->monc.monmap,
185 EXPORT_SYMBOL(ceph_compare_options);
187 void *ceph_kvmalloc(size_t size, gfp_t flags)
189 if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
190 void *ptr = kmalloc(size, flags | __GFP_NOWARN);
195 return __vmalloc(size, flags, PAGE_KERNEL);
199 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
206 dout("parse_fsid '%s'\n", str);
208 while (*str && i < 16) {
213 if (!isxdigit(str[0]) || !isxdigit(str[1]))
217 if (sscanf(tmp, "%x", &d) < 1)
219 fsid->fsid[i] = d & 0xff;
226 dout("parse_fsid ret %d got fsid %pU\n", err, fsid);
235 Opt_osdkeepalivetimeout,
238 Opt_osd_request_timeout,
247 /* string args above */
252 Opt_cephx_require_signatures,
253 Opt_nocephx_require_signatures,
254 Opt_cephx_sign_messages,
255 Opt_nocephx_sign_messages,
260 static match_table_t opt_tokens = {
261 {Opt_osdtimeout, "osdtimeout=%d"},
262 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
263 {Opt_mount_timeout, "mount_timeout=%d"},
264 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
265 {Opt_osd_request_timeout, "osd_request_timeout=%d"},
267 {Opt_fsid, "fsid=%s"},
268 {Opt_name, "name=%s"},
269 {Opt_secret, "secret=%s"},
272 /* string args above */
273 {Opt_share, "share"},
274 {Opt_noshare, "noshare"},
276 {Opt_nocrc, "nocrc"},
277 {Opt_cephx_require_signatures, "cephx_require_signatures"},
278 {Opt_nocephx_require_signatures, "nocephx_require_signatures"},
279 {Opt_cephx_sign_messages, "cephx_sign_messages"},
280 {Opt_nocephx_sign_messages, "nocephx_sign_messages"},
281 {Opt_tcp_nodelay, "tcp_nodelay"},
282 {Opt_notcp_nodelay, "notcp_nodelay"},
286 void ceph_destroy_options(struct ceph_options *opt)
288 dout("destroy_options %p\n", opt);
291 ceph_crypto_key_destroy(opt->key);
294 kfree(opt->mon_addr);
297 EXPORT_SYMBOL(ceph_destroy_options);
299 /* get secret from key store */
300 static int get_secret(struct ceph_crypto_key *dst, const char *name) {
304 struct ceph_crypto_key *ckey;
306 ukey = request_key(&key_type_ceph, name, NULL);
307 if (!ukey || IS_ERR(ukey)) {
308 /* request_key errors don't map nicely to mount(2)
309 errors; don't even try, but still printk */
310 key_err = PTR_ERR(ukey);
313 pr_warn("ceph: Mount failed due to key not found: %s\n",
317 pr_warn("ceph: Mount failed due to expired key: %s\n",
321 pr_warn("ceph: Mount failed due to revoked key: %s\n",
325 pr_warn("ceph: Mount failed due to unknown key error %d: %s\n",
332 ckey = ukey->payload.data[0];
333 err = ceph_crypto_key_clone(dst, ckey);
336 /* pass through, err is 0 */
344 struct ceph_options *
345 ceph_parse_options(char *options, const char *dev_name,
346 const char *dev_name_end,
347 int (*parse_extra_token)(char *c, void *private),
350 struct ceph_options *opt;
353 substring_t argstr[MAX_OPT_ARGS];
355 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
357 return ERR_PTR(-ENOMEM);
358 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
363 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
366 /* start with defaults */
367 opt->flags = CEPH_OPT_DEFAULT;
368 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
369 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
370 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
371 opt->osd_request_timeout = CEPH_OSD_REQUEST_TIMEOUT_DEFAULT;
374 /* ip1[:port1][,ip2[:port2]...] */
375 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
376 CEPH_MAX_MON, &opt->num_mon);
380 /* parse mount options */
381 while ((c = strsep(&options, ",")) != NULL) {
382 int token, intval, ret;
386 token = match_token((char *)c, opt_tokens, argstr);
387 if (token < 0 && parse_extra_token) {
389 err = parse_extra_token((char *)c, private);
391 pr_err("bad option at '%s'\n", c);
396 if (token < Opt_last_int) {
397 ret = match_int(&argstr[0], &intval);
399 pr_err("bad mount option arg (not int) "
403 dout("got int token %d val %d\n", token, intval);
404 } else if (token > Opt_last_int && token < Opt_last_string) {
405 dout("got string token %d val %s\n", token,
408 dout("got token %d\n", token);
412 err = ceph_parse_ips(argstr[0].from,
418 opt->flags |= CEPH_OPT_MYIP;
422 err = parse_fsid(argstr[0].from, &opt->fsid);
424 opt->flags |= CEPH_OPT_FSID;
428 opt->name = kstrndup(argstr[0].from,
429 argstr[0].to-argstr[0].from,
437 ceph_crypto_key_destroy(opt->key);
440 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
445 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
450 ceph_crypto_key_destroy(opt->key);
453 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
458 err = get_secret(opt->key, argstr[0].from);
465 pr_warn("ignoring deprecated osdtimeout option\n");
467 case Opt_osdkeepalivetimeout:
468 /* 0 isn't well defined right now, reject it */
469 if (intval < 1 || intval > INT_MAX / 1000) {
470 pr_err("osdkeepalive out of range\n");
474 opt->osd_keepalive_timeout =
475 msecs_to_jiffies(intval * 1000);
477 case Opt_osd_idle_ttl:
478 /* 0 isn't well defined right now, reject it */
479 if (intval < 1 || intval > INT_MAX / 1000) {
480 pr_err("osd_idle_ttl out of range\n");
484 opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
486 case Opt_mount_timeout:
487 /* 0 is "wait forever" (i.e. infinite timeout) */
488 if (intval < 0 || intval > INT_MAX / 1000) {
489 pr_err("mount_timeout out of range\n");
493 opt->mount_timeout = msecs_to_jiffies(intval * 1000);
495 case Opt_osd_request_timeout:
496 /* 0 is "wait forever" (i.e. infinite timeout) */
497 if (intval < 0 || intval > INT_MAX / 1000) {
498 pr_err("osd_request_timeout out of range\n");
502 opt->osd_request_timeout = msecs_to_jiffies(intval * 1000);
506 opt->flags &= ~CEPH_OPT_NOSHARE;
509 opt->flags |= CEPH_OPT_NOSHARE;
513 opt->flags &= ~CEPH_OPT_NOCRC;
516 opt->flags |= CEPH_OPT_NOCRC;
519 case Opt_cephx_require_signatures:
520 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
522 case Opt_nocephx_require_signatures:
523 opt->flags |= CEPH_OPT_NOMSGAUTH;
525 case Opt_cephx_sign_messages:
526 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
528 case Opt_nocephx_sign_messages:
529 opt->flags |= CEPH_OPT_NOMSGSIGN;
532 case Opt_tcp_nodelay:
533 opt->flags |= CEPH_OPT_TCP_NODELAY;
535 case Opt_notcp_nodelay:
536 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
548 ceph_destroy_options(opt);
551 EXPORT_SYMBOL(ceph_parse_options);
553 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
555 struct ceph_options *opt = client->options;
556 size_t pos = m->count;
559 seq_puts(m, "name=");
560 seq_escape(m, opt->name, ", \t\n\\");
564 seq_puts(m, "secret=<hidden>,");
566 if (opt->flags & CEPH_OPT_FSID)
567 seq_printf(m, "fsid=%pU,", &opt->fsid);
568 if (opt->flags & CEPH_OPT_NOSHARE)
569 seq_puts(m, "noshare,");
570 if (opt->flags & CEPH_OPT_NOCRC)
571 seq_puts(m, "nocrc,");
572 if (opt->flags & CEPH_OPT_NOMSGAUTH)
573 seq_puts(m, "nocephx_require_signatures,");
574 if (opt->flags & CEPH_OPT_NOMSGSIGN)
575 seq_puts(m, "nocephx_sign_messages,");
576 if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
577 seq_puts(m, "notcp_nodelay,");
579 if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
580 seq_printf(m, "mount_timeout=%d,",
581 jiffies_to_msecs(opt->mount_timeout) / 1000);
582 if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
583 seq_printf(m, "osd_idle_ttl=%d,",
584 jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
585 if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
586 seq_printf(m, "osdkeepalivetimeout=%d,",
587 jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
588 if (opt->osd_request_timeout != CEPH_OSD_REQUEST_TIMEOUT_DEFAULT)
589 seq_printf(m, "osd_request_timeout=%d,",
590 jiffies_to_msecs(opt->osd_request_timeout) / 1000);
592 /* drop redundant comma */
598 EXPORT_SYMBOL(ceph_print_client_options);
600 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
602 return &client->msgr.inst.addr;
604 EXPORT_SYMBOL(ceph_client_addr);
606 u64 ceph_client_gid(struct ceph_client *client)
608 return client->monc.auth->global_id;
610 EXPORT_SYMBOL(ceph_client_gid);
613 * create a fresh client instance
615 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
617 struct ceph_client *client;
618 struct ceph_entity_addr *myaddr = NULL;
621 err = wait_for_random_bytes();
625 client = kzalloc(sizeof(*client), GFP_KERNEL);
627 return ERR_PTR(-ENOMEM);
629 client->private = private;
630 client->options = opt;
632 mutex_init(&client->mount_mutex);
633 init_waitqueue_head(&client->auth_wq);
634 client->auth_err = 0;
636 client->extra_mon_dispatch = NULL;
637 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
638 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
640 if (!ceph_test_opt(client, NOMSGAUTH))
641 client->required_features |= CEPH_FEATURE_MSG_AUTH;
644 if (ceph_test_opt(client, MYIP))
645 myaddr = &client->options->my_addr;
647 ceph_messenger_init(&client->msgr, myaddr);
650 err = ceph_monc_init(&client->monc, client);
653 err = ceph_osdc_init(&client->osdc, client);
660 ceph_monc_stop(&client->monc);
662 ceph_messenger_fini(&client->msgr);
666 EXPORT_SYMBOL(ceph_create_client);
668 void ceph_destroy_client(struct ceph_client *client)
670 dout("destroy_client %p\n", client);
672 atomic_set(&client->msgr.stopping, 1);
675 ceph_osdc_stop(&client->osdc);
676 ceph_monc_stop(&client->monc);
677 ceph_messenger_fini(&client->msgr);
679 ceph_debugfs_client_cleanup(client);
681 ceph_destroy_options(client->options);
684 dout("destroy_client %p done\n", client);
686 EXPORT_SYMBOL(ceph_destroy_client);
689 * true if we have the mon map (and have thus joined the cluster)
691 static bool have_mon_and_osd_map(struct ceph_client *client)
693 return client->monc.monmap && client->monc.monmap->epoch &&
694 client->osdc.osdmap && client->osdc.osdmap->epoch;
698 * mount: join the ceph cluster, and open root directory.
700 int __ceph_open_session(struct ceph_client *client, unsigned long started)
702 unsigned long timeout = client->options->mount_timeout;
705 /* open session, and wait for mon and osd maps */
706 err = ceph_monc_open_session(&client->monc);
710 while (!have_mon_and_osd_map(client)) {
711 if (timeout && time_after_eq(jiffies, started + timeout))
715 dout("mount waiting for mon_map\n");
716 err = wait_event_interruptible_timeout(client->auth_wq,
717 have_mon_and_osd_map(client) || (client->auth_err < 0),
718 ceph_timeout_jiffies(timeout));
721 if (client->auth_err < 0)
722 return client->auth_err;
725 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
727 ceph_debugfs_client_init(client);
731 EXPORT_SYMBOL(__ceph_open_session);
734 int ceph_open_session(struct ceph_client *client)
737 unsigned long started = jiffies; /* note the start time */
739 dout("open_session start\n");
740 mutex_lock(&client->mount_mutex);
742 ret = __ceph_open_session(client, started);
744 mutex_unlock(&client->mount_mutex);
747 EXPORT_SYMBOL(ceph_open_session);
750 static int __init init_ceph_lib(void)
754 ret = ceph_debugfs_init();
758 ret = ceph_crypto_init();
762 ret = ceph_msgr_init();
766 ret = ceph_osdc_setup();
770 pr_info("loaded (mon/osd proto %d/%d)\n",
771 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
778 ceph_crypto_shutdown();
780 ceph_debugfs_cleanup();
785 static void __exit exit_ceph_lib(void)
787 dout("exit_ceph_lib\n");
788 WARN_ON(!ceph_strings_empty());
792 ceph_crypto_shutdown();
793 ceph_debugfs_cleanup();
796 module_init(init_ceph_lib);
797 module_exit(exit_ceph_lib);
799 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
800 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
801 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
802 MODULE_DESCRIPTION("Ceph core library");
803 MODULE_LICENSE("GPL");