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/parser.h>
13 #include <linux/sched.h>
14 #include <linux/seq_file.h>
15 #include <linux/slab.h>
16 #include <linux/statfs.h>
17 #include <linux/string.h>
18 #include <linux/nsproxy.h>
19 #include <net/net_namespace.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);
49 * find filename portion of a path (/foo/bar/baz -> baz)
51 const char *ceph_file_part(const char *s, int len)
53 const char *e = s + len;
55 while (e != s && *(e-1) != '/')
59 EXPORT_SYMBOL(ceph_file_part);
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_MDS_MAP: return "mds_map";
75 case CEPH_MSG_CLIENT_SESSION: return "client_session";
76 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
77 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
78 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
79 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
80 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
81 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
82 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
83 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
84 case CEPH_MSG_OSD_MAP: return "osd_map";
85 case CEPH_MSG_OSD_OP: return "osd_op";
86 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
87 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
88 default: return "unknown";
91 EXPORT_SYMBOL(ceph_msg_type_name);
94 * Initially learn our fsid, or verify an fsid matches.
96 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
98 if (client->have_fsid) {
99 if (ceph_fsid_compare(&client->fsid, fsid)) {
100 pr_err("bad fsid, had %pU got %pU",
101 &client->fsid, fsid);
105 memcpy(&client->fsid, fsid, sizeof(*fsid));
109 EXPORT_SYMBOL(ceph_check_fsid);
111 static int strcmp_null(const char *s1, const char *s2)
119 return strcmp(s1, s2);
122 int ceph_compare_options(struct ceph_options *new_opt,
123 struct ceph_client *client)
125 struct ceph_options *opt1 = new_opt;
126 struct ceph_options *opt2 = client->options;
127 int ofs = offsetof(struct ceph_options, mon_addr);
131 ret = memcmp(opt1, opt2, ofs);
135 ret = strcmp_null(opt1->name, opt2->name);
139 if (opt1->key && !opt2->key)
141 if (!opt1->key && opt2->key)
143 if (opt1->key && opt2->key) {
144 if (opt1->key->type != opt2->key->type)
146 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
148 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
150 if (opt1->key->len != opt2->key->len)
152 if (opt1->key->key && !opt2->key->key)
154 if (!opt1->key->key && opt2->key->key)
156 if (opt1->key->key && opt2->key->key) {
157 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
163 /* any matching mon ip implies a match */
164 for (i = 0; i < opt1->num_mon; i++) {
165 if (ceph_monmap_contains(client->monc.monmap,
171 EXPORT_SYMBOL(ceph_compare_options);
174 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
181 dout("parse_fsid '%s'\n", str);
183 while (*str && i < 16) {
188 if (!isxdigit(str[0]) || !isxdigit(str[1]))
192 if (sscanf(tmp, "%x", &d) < 1)
194 fsid->fsid[i] = d & 0xff;
201 dout("parse_fsid ret %d got fsid %pU", err, fsid);
210 Opt_osdkeepalivetimeout,
221 /* string args above */
228 static match_table_t opt_tokens = {
229 {Opt_osdtimeout, "osdtimeout=%d"},
230 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
231 {Opt_mount_timeout, "mount_timeout=%d"},
232 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
234 {Opt_fsid, "fsid=%s"},
235 {Opt_name, "name=%s"},
236 {Opt_secret, "secret=%s"},
239 /* string args above */
240 {Opt_share, "share"},
241 {Opt_noshare, "noshare"},
243 {Opt_nocrc, "nocrc"},
247 void ceph_destroy_options(struct ceph_options *opt)
249 dout("destroy_options %p\n", opt);
252 ceph_crypto_key_destroy(opt->key);
255 kfree(opt->mon_addr);
258 EXPORT_SYMBOL(ceph_destroy_options);
260 /* get secret from key store */
261 static int get_secret(struct ceph_crypto_key *dst, const char *name) {
265 struct ceph_crypto_key *ckey;
267 ukey = request_key(&key_type_ceph, name, NULL);
268 if (!ukey || IS_ERR(ukey)) {
269 /* request_key errors don't map nicely to mount(2)
270 errors; don't even try, but still printk */
271 key_err = PTR_ERR(ukey);
274 pr_warning("ceph: Mount failed due to key not found: %s\n", name);
277 pr_warning("ceph: Mount failed due to expired key: %s\n", name);
280 pr_warning("ceph: Mount failed due to revoked key: %s\n", name);
283 pr_warning("ceph: Mount failed due to unknown key error"
284 " %d: %s\n", key_err, name);
290 ckey = ukey->payload.data;
291 err = ceph_crypto_key_clone(dst, ckey);
294 /* pass through, err is 0 */
302 struct ceph_options *
303 ceph_parse_options(char *options, const char *dev_name,
304 const char *dev_name_end,
305 int (*parse_extra_token)(char *c, void *private),
308 struct ceph_options *opt;
311 substring_t argstr[MAX_OPT_ARGS];
313 if (current->nsproxy->net_ns != &init_net)
314 return ERR_PTR(-EINVAL);
316 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
318 return ERR_PTR(-ENOMEM);
319 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
324 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
327 /* start with defaults */
328 opt->flags = CEPH_OPT_DEFAULT;
329 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
330 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
331 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
334 /* ip1[:port1][,ip2[:port2]...] */
335 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
336 CEPH_MAX_MON, &opt->num_mon);
340 /* parse mount options */
341 while ((c = strsep(&options, ",")) != NULL) {
342 int token, intval, ret;
346 token = match_token((char *)c, opt_tokens, argstr);
347 if (token < 0 && parse_extra_token) {
349 err = parse_extra_token((char *)c, private);
351 pr_err("bad option at '%s'\n", c);
356 if (token < Opt_last_int) {
357 ret = match_int(&argstr[0], &intval);
359 pr_err("bad mount option arg (not int) "
363 dout("got int token %d val %d\n", token, intval);
364 } else if (token > Opt_last_int && token < Opt_last_string) {
365 dout("got string token %d val %s\n", token,
368 dout("got token %d\n", token);
372 err = ceph_parse_ips(argstr[0].from,
378 opt->flags |= CEPH_OPT_MYIP;
382 err = parse_fsid(argstr[0].from, &opt->fsid);
384 opt->flags |= CEPH_OPT_FSID;
387 opt->name = kstrndup(argstr[0].from,
388 argstr[0].to-argstr[0].from,
392 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
397 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
402 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
407 err = get_secret(opt->key, argstr[0].from);
414 pr_warning("ignoring deprecated osdtimeout option\n");
416 case Opt_osdkeepalivetimeout:
417 opt->osd_keepalive_timeout = intval;
419 case Opt_osd_idle_ttl:
420 opt->osd_idle_ttl = intval;
422 case Opt_mount_timeout:
423 opt->mount_timeout = intval;
427 opt->flags &= ~CEPH_OPT_NOSHARE;
430 opt->flags |= CEPH_OPT_NOSHARE;
434 opt->flags &= ~CEPH_OPT_NOCRC;
437 opt->flags |= CEPH_OPT_NOCRC;
449 ceph_destroy_options(opt);
452 EXPORT_SYMBOL(ceph_parse_options);
454 u64 ceph_client_id(struct ceph_client *client)
456 return client->monc.auth->global_id;
458 EXPORT_SYMBOL(ceph_client_id);
461 * create a fresh client instance
463 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
464 unsigned int supported_features,
465 unsigned int required_features)
467 struct ceph_client *client;
468 struct ceph_entity_addr *myaddr = NULL;
471 client = kzalloc(sizeof(*client), GFP_KERNEL);
473 return ERR_PTR(-ENOMEM);
475 client->private = private;
476 client->options = opt;
478 mutex_init(&client->mount_mutex);
479 init_waitqueue_head(&client->auth_wq);
480 client->auth_err = 0;
482 client->extra_mon_dispatch = NULL;
483 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
485 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
489 if (ceph_test_opt(client, MYIP))
490 myaddr = &client->options->my_addr;
491 ceph_messenger_init(&client->msgr, myaddr,
492 client->supported_features,
493 client->required_features,
494 ceph_test_opt(client, NOCRC));
497 err = ceph_monc_init(&client->monc, client);
500 err = ceph_osdc_init(&client->osdc, client);
507 ceph_monc_stop(&client->monc);
512 EXPORT_SYMBOL(ceph_create_client);
514 void ceph_destroy_client(struct ceph_client *client)
516 dout("destroy_client %p\n", client);
518 atomic_set(&client->msgr.stopping, 1);
521 ceph_osdc_stop(&client->osdc);
523 ceph_monc_stop(&client->monc);
525 ceph_debugfs_client_cleanup(client);
527 ceph_destroy_options(client->options);
530 dout("destroy_client %p done\n", client);
532 EXPORT_SYMBOL(ceph_destroy_client);
535 * true if we have the mon map (and have thus joined the cluster)
537 static int have_mon_and_osd_map(struct ceph_client *client)
539 return client->monc.monmap && client->monc.monmap->epoch &&
540 client->osdc.osdmap && client->osdc.osdmap->epoch;
544 * mount: join the ceph cluster, and open root directory.
546 int __ceph_open_session(struct ceph_client *client, unsigned long started)
549 unsigned long timeout = client->options->mount_timeout * HZ;
551 /* open session, and wait for mon and osd maps */
552 err = ceph_monc_open_session(&client->monc);
556 while (!have_mon_and_osd_map(client)) {
558 if (timeout && time_after_eq(jiffies, started + timeout))
562 dout("mount waiting for mon_map\n");
563 err = wait_event_interruptible_timeout(client->auth_wq,
564 have_mon_and_osd_map(client) || (client->auth_err < 0),
566 if (err == -EINTR || err == -ERESTARTSYS)
568 if (client->auth_err < 0)
569 return client->auth_err;
574 EXPORT_SYMBOL(__ceph_open_session);
577 int ceph_open_session(struct ceph_client *client)
580 unsigned long started = jiffies; /* note the start time */
582 dout("open_session start\n");
583 mutex_lock(&client->mount_mutex);
585 ret = __ceph_open_session(client, started);
587 mutex_unlock(&client->mount_mutex);
590 EXPORT_SYMBOL(ceph_open_session);
593 static int __init init_ceph_lib(void)
597 ret = ceph_debugfs_init();
601 ret = ceph_crypto_init();
605 ret = ceph_msgr_init();
609 ret = ceph_osdc_setup();
613 pr_info("loaded (mon/osd proto %d/%d)\n",
614 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
621 ceph_crypto_shutdown();
623 ceph_debugfs_cleanup();
628 static void __exit exit_ceph_lib(void)
630 dout("exit_ceph_lib\n");
633 ceph_crypto_shutdown();
634 ceph_debugfs_cleanup();
637 module_init(init_ceph_lib);
638 module_exit(exit_ceph_lib);
640 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
641 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
642 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
643 MODULE_DESCRIPTION("Ceph filesystem for Linux");
644 MODULE_LICENSE("GPL");