1 // SPDX-License-Identifier: GPL-2.0-only
3 #include <linux/ceph/ceph_debug.h>
4 #include <linux/backing-dev.h>
5 #include <linux/ctype.h>
7 #include <linux/inet.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>
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>
34 * Module compatibility interface. For now it doesn't do anything,
35 * but its existence signals a certain level of functionality.
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.
42 * The data pointer can be null.
44 bool libceph_compatible(void *data)
48 EXPORT_SYMBOL(libceph_compatible);
50 static int param_get_supported_features(char *buffer,
51 const struct kernel_param *kp)
53 return sprintf(buffer, "0x%llx", CEPH_FEATURES_SUPPORTED_DEFAULT);
55 static const struct kernel_param_ops param_ops_supported_features = {
56 .get = param_get_supported_features,
58 module_param_cb(supported_features, ¶m_ops_supported_features, NULL,
61 const char *ceph_msg_type_name(int 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";
100 EXPORT_SYMBOL(ceph_msg_type_name);
103 * Initially learn our fsid, or verify an fsid matches.
105 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
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);
114 memcpy(&client->fsid, fsid, sizeof(*fsid));
118 EXPORT_SYMBOL(ceph_check_fsid);
120 static int strcmp_null(const char *s1, const char *s2)
128 return strcmp(s1, s2);
131 int ceph_compare_options(struct ceph_options *new_opt,
132 struct ceph_client *client)
134 struct ceph_options *opt1 = new_opt;
135 struct ceph_options *opt2 = client->options;
136 int ofs = offsetof(struct ceph_options, mon_addr);
141 * Don't bother comparing options if network namespaces don't
144 if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
147 ret = memcmp(opt1, opt2, ofs);
151 ret = strcmp_null(opt1->name, opt2->name);
155 if (opt1->key && !opt2->key)
157 if (!opt1->key && opt2->key)
159 if (opt1->key && opt2->key) {
160 if (opt1->key->type != opt2->key->type)
162 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
164 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
166 if (opt1->key->len != opt2->key->len)
168 if (opt1->key->key && !opt2->key->key)
170 if (!opt1->key->key && opt2->key->key)
172 if (opt1->key->key && opt2->key->key) {
173 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
179 ret = ceph_compare_crush_locs(&opt1->crush_locs, &opt2->crush_locs);
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,
191 EXPORT_SYMBOL(ceph_compare_options);
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.
199 * ceph_kvmalloc() may be called with GFP_KERNEL, GFP_NOFS or GFP_NOIO.
201 void *ceph_kvmalloc(size_t size, gfp_t flags)
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);
212 unsigned int noio_flag = memalloc_noio_save();
213 p = kvmalloc(size, GFP_KERNEL);
214 memalloc_noio_restore(noio_flag);
220 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
227 dout("parse_fsid '%s'\n", str);
229 while (*str && i < 16) {
234 if (!isxdigit(str[0]) || !isxdigit(str[1]))
238 if (sscanf(tmp, "%x", &d) < 1)
240 fsid->fsid[i] = d & 0xff;
247 dout("parse_fsid ret %d got fsid %pU\n", err, fsid);
256 Opt_osdkeepalivetimeout,
259 Opt_osd_request_timeout,
267 Opt_read_from_replica,
269 /* string args above */
272 Opt_cephx_require_signatures,
273 Opt_cephx_sign_messages,
279 Opt_read_from_replica_no,
280 Opt_read_from_replica_balance,
281 Opt_read_from_replica_localize,
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},
295 Opt_ms_mode_prefer_crc,
296 Opt_ms_mode_prefer_secure
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},
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,
328 fsparam_string ("secret", Opt_secret),
329 fsparam_flag_no ("share", Opt_share),
330 fsparam_flag_no ("tcp_nodelay", Opt_tcp_nodelay),
334 struct ceph_options *ceph_alloc_options(void)
336 struct ceph_options *opt;
338 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
342 opt->crush_locs = RB_ROOT;
343 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
345 if (!opt->mon_addr) {
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;
360 EXPORT_SYMBOL(ceph_alloc_options);
362 void ceph_destroy_options(struct ceph_options *opt)
364 dout("destroy_options %p\n", opt);
368 ceph_clear_crush_locs(&opt->crush_locs);
371 ceph_crypto_key_destroy(opt->key);
374 kfree(opt->mon_addr);
377 EXPORT_SYMBOL(ceph_destroy_options);
379 /* get secret from key store */
380 static int get_secret(struct ceph_crypto_key *dst, const char *name,
386 struct ceph_crypto_key *ckey;
388 ukey = request_key(&key_type_ceph, name, NULL);
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);
395 error_plog(log, "Failed due to key not found: %s",
399 error_plog(log, "Failed due to expired key: %s",
403 error_plog(log, "Failed due to revoked key: %s",
407 error_plog(log, "Failed due to key error %d: %s",
414 ckey = ukey->payload.data[0];
415 err = ceph_crypto_key_clone(dst, ckey);
418 /* pass through, err is 0 */
426 int ceph_parse_mon_ips(const char *buf, size_t len, struct ceph_options *opt,
429 struct p_log log = {.prefix = "libceph", .log = l};
432 /* ip1[:port1][,ip2[:port2]...] */
433 ret = ceph_parse_ips(buf, buf + len, opt->mon_addr, CEPH_MAX_MON,
436 error_plog(&log, "Failed to parse monitor IPs: %d", ret);
442 EXPORT_SYMBOL(ceph_parse_mon_ips);
444 int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
447 struct fs_parse_result result;
449 struct p_log log = {.prefix = "libceph", .log = l};
451 token = __fs_parse(&log, ceph_parameters, param, &result);
452 dout("%s fs_parse '%s' token %d\n", __func__, param->key, token);
458 err = ceph_parse_ips(param->string,
459 param->string + param->size,
463 error_plog(&log, "Failed to parse ip: %d", err);
466 opt->flags |= CEPH_OPT_MYIP;
470 err = parse_fsid(param->string, &opt->fsid);
472 error_plog(&log, "Failed to parse fsid: %d", err);
475 opt->flags |= CEPH_OPT_FSID;
479 opt->name = param->string;
480 param->string = NULL;
483 ceph_crypto_key_destroy(opt->key);
486 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
489 err = ceph_crypto_key_unarmor(opt->key, param->string);
491 error_plog(&log, "Failed to parse secret: %d", err);
496 ceph_crypto_key_destroy(opt->key);
499 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
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,
508 error_plog(&log, "Failed to parse CRUSH location: %d",
513 case Opt_read_from_replica:
514 switch (result.uint_32) {
515 case Opt_read_from_replica_no:
516 opt->read_from_replica = 0;
518 case Opt_read_from_replica_balance:
519 opt->read_from_replica = CEPH_OSD_FLAG_BALANCE_READS;
521 case Opt_read_from_replica_localize:
522 opt->read_from_replica = CEPH_OSD_FLAG_LOCALIZE_READS;
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;
534 case Opt_ms_mode_crc:
535 opt->con_modes[0] = CEPH_CON_MODE_CRC;
536 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
538 case Opt_ms_mode_secure:
539 opt->con_modes[0] = CEPH_CON_MODE_SECURE;
540 opt->con_modes[1] = CEPH_CON_MODE_UNKNOWN;
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;
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;
556 warn_plog(&log, "Ignoring osdtimeout");
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)
562 opt->osd_keepalive_timeout =
563 msecs_to_jiffies(result.uint_32 * 1000);
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)
569 opt->osd_idle_ttl = msecs_to_jiffies(result.uint_32 * 1000);
571 case Opt_mount_timeout:
572 /* 0 is "wait forever" (i.e. infinite timeout) */
573 if (result.uint_32 > INT_MAX / 1000)
575 opt->mount_timeout = msecs_to_jiffies(result.uint_32 * 1000);
577 case Opt_osd_request_timeout:
578 /* 0 is "wait forever" (i.e. infinite timeout) */
579 if (result.uint_32 > INT_MAX / 1000)
581 opt->osd_request_timeout =
582 msecs_to_jiffies(result.uint_32 * 1000);
587 opt->flags &= ~CEPH_OPT_NOSHARE;
589 opt->flags |= CEPH_OPT_NOSHARE;
593 opt->flags &= ~CEPH_OPT_NOCRC;
595 opt->flags |= CEPH_OPT_NOCRC;
597 case Opt_cephx_require_signatures:
599 opt->flags &= ~CEPH_OPT_NOMSGAUTH;
601 opt->flags |= CEPH_OPT_NOMSGAUTH;
603 case Opt_cephx_sign_messages:
605 opt->flags &= ~CEPH_OPT_NOMSGSIGN;
607 opt->flags |= CEPH_OPT_NOMSGSIGN;
609 case Opt_tcp_nodelay:
611 opt->flags |= CEPH_OPT_TCP_NODELAY;
613 opt->flags &= ~CEPH_OPT_TCP_NODELAY;
616 case Opt_abort_on_full:
617 opt->flags |= CEPH_OPT_ABORT_ON_FULL;
627 return inval_plog(&log, "%s out of range", param->key);
629 EXPORT_SYMBOL(ceph_parse_param);
631 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client,
634 struct ceph_options *opt = client->options;
635 size_t pos = m->count;
639 seq_puts(m, "name=");
640 seq_escape(m, opt->name, ", \t\n\\");
644 seq_puts(m, "secret=<hidden>,");
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);
652 seq_printf(m, "%s:%s", loc->cl_loc.cl_type_name,
653 loc->cl_loc.cl_name);
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,");
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,");
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,");
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);
711 /* drop redundant comma */
717 EXPORT_SYMBOL(ceph_print_client_options);
719 struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
721 return &client->msgr.inst.addr;
723 EXPORT_SYMBOL(ceph_client_addr);
725 u64 ceph_client_gid(struct ceph_client *client)
727 return client->monc.auth->global_id;
729 EXPORT_SYMBOL(ceph_client_gid);
732 * create a fresh client instance
734 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
736 struct ceph_client *client;
737 struct ceph_entity_addr *myaddr = NULL;
740 err = wait_for_random_bytes();
744 client = kzalloc(sizeof(*client), GFP_KERNEL);
746 return ERR_PTR(-ENOMEM);
748 client->private = private;
749 client->options = opt;
751 mutex_init(&client->mount_mutex);
752 init_waitqueue_head(&client->auth_wq);
753 client->auth_err = 0;
755 client->extra_mon_dispatch = NULL;
756 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT;
757 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT;
759 if (!ceph_test_opt(client, NOMSGAUTH))
760 client->required_features |= CEPH_FEATURE_MSG_AUTH;
763 if (ceph_test_opt(client, MYIP))
764 myaddr = &client->options->my_addr;
766 ceph_messenger_init(&client->msgr, myaddr);
769 err = ceph_monc_init(&client->monc, client);
772 err = ceph_osdc_init(&client->osdc, client);
779 ceph_monc_stop(&client->monc);
781 ceph_messenger_fini(&client->msgr);
785 EXPORT_SYMBOL(ceph_create_client);
787 void ceph_destroy_client(struct ceph_client *client)
789 dout("destroy_client %p\n", client);
791 atomic_set(&client->msgr.stopping, 1);
794 ceph_osdc_stop(&client->osdc);
795 ceph_monc_stop(&client->monc);
796 ceph_messenger_fini(&client->msgr);
798 ceph_debugfs_client_cleanup(client);
800 ceph_destroy_options(client->options);
803 dout("destroy_client %p done\n", client);
805 EXPORT_SYMBOL(ceph_destroy_client);
807 void ceph_reset_client_addr(struct ceph_client *client)
809 ceph_messenger_reset_nonce(&client->msgr);
810 ceph_monc_reopen_session(&client->monc);
811 ceph_osdc_reopen_osds(&client->osdc);
813 EXPORT_SYMBOL(ceph_reset_client_addr);
816 * true if we have the mon map (and have thus joined the cluster)
818 static bool have_mon_and_osd_map(struct ceph_client *client)
820 return client->monc.monmap && client->monc.monmap->epoch &&
821 client->osdc.osdmap && client->osdc.osdmap->epoch;
825 * mount: join the ceph cluster, and open root directory.
827 int __ceph_open_session(struct ceph_client *client, unsigned long started)
829 unsigned long timeout = client->options->mount_timeout;
832 /* open session, and wait for mon and osd maps */
833 err = ceph_monc_open_session(&client->monc);
837 while (!have_mon_and_osd_map(client)) {
838 if (timeout && time_after_eq(jiffies, started + timeout))
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));
848 if (client->auth_err < 0)
849 return client->auth_err;
852 pr_info("client%llu fsid %pU\n", ceph_client_gid(client),
854 ceph_debugfs_client_init(client);
858 EXPORT_SYMBOL(__ceph_open_session);
860 int ceph_open_session(struct ceph_client *client)
863 unsigned long started = jiffies; /* note the start time */
865 dout("open_session start\n");
866 mutex_lock(&client->mount_mutex);
868 ret = __ceph_open_session(client, started);
870 mutex_unlock(&client->mount_mutex);
873 EXPORT_SYMBOL(ceph_open_session);
875 int ceph_wait_for_latest_osdmap(struct ceph_client *client,
876 unsigned long timeout)
881 ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch);
885 if (client->osdc.osdmap->epoch >= newest_epoch)
888 ceph_osdc_maybe_request_map(&client->osdc);
889 return ceph_monc_wait_osdmap(&client->monc, newest_epoch, timeout);
891 EXPORT_SYMBOL(ceph_wait_for_latest_osdmap);
893 static int __init init_ceph_lib(void)
899 ret = ceph_crypto_init();
903 ret = ceph_msgr_init();
907 ret = ceph_osdc_setup();
911 pr_info("loaded (mon/osd proto %d/%d)\n",
912 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
919 ceph_crypto_shutdown();
921 ceph_debugfs_cleanup();
925 static void __exit exit_ceph_lib(void)
927 dout("exit_ceph_lib\n");
928 WARN_ON(!ceph_strings_empty());
932 ceph_crypto_shutdown();
933 ceph_debugfs_cleanup();
936 module_init(init_ceph_lib);
937 module_exit(exit_ceph_lib);
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");