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>
20 #include <linux/ceph/ceph_features.h>
21 #include <linux/ceph/libceph.h>
22 #include <linux/ceph/debugfs.h>
23 #include <linux/ceph/decode.h>
24 #include <linux/ceph/mon_client.h>
25 #include <linux/ceph/auth.h>
31 * find filename portion of a path (/foo/bar/baz -> baz)
33 const char *ceph_file_part(const char *s, int len)
35 const char *e = s + len;
37 while (e != s && *(e-1) != '/')
41 EXPORT_SYMBOL(ceph_file_part);
43 const char *ceph_msg_type_name(int type)
46 case CEPH_MSG_SHUTDOWN: return "shutdown";
47 case CEPH_MSG_PING: return "ping";
48 case CEPH_MSG_AUTH: return "auth";
49 case CEPH_MSG_AUTH_REPLY: return "auth_reply";
50 case CEPH_MSG_MON_MAP: return "mon_map";
51 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
52 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
53 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
54 case CEPH_MSG_STATFS: return "statfs";
55 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
56 case CEPH_MSG_MDS_MAP: return "mds_map";
57 case CEPH_MSG_CLIENT_SESSION: return "client_session";
58 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
59 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
60 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
61 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
62 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
63 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
64 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
65 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
66 case CEPH_MSG_OSD_MAP: return "osd_map";
67 case CEPH_MSG_OSD_OP: return "osd_op";
68 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
69 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
70 default: return "unknown";
73 EXPORT_SYMBOL(ceph_msg_type_name);
76 * Initially learn our fsid, or verify an fsid matches.
78 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
80 if (client->have_fsid) {
81 if (ceph_fsid_compare(&client->fsid, fsid)) {
82 pr_err("bad fsid, had %pU got %pU",
87 pr_info("client%lld fsid %pU\n", ceph_client_id(client), fsid);
88 memcpy(&client->fsid, fsid, sizeof(*fsid));
92 EXPORT_SYMBOL(ceph_check_fsid);
94 static int strcmp_null(const char *s1, const char *s2)
102 return strcmp(s1, s2);
105 int ceph_compare_options(struct ceph_options *new_opt,
106 struct ceph_client *client)
108 struct ceph_options *opt1 = new_opt;
109 struct ceph_options *opt2 = client->options;
110 int ofs = offsetof(struct ceph_options, mon_addr);
114 ret = memcmp(opt1, opt2, ofs);
118 ret = strcmp_null(opt1->name, opt2->name);
122 if (opt1->key && !opt2->key)
124 if (!opt1->key && opt2->key)
126 if (opt1->key && opt2->key) {
127 if (opt1->key->type != opt2->key->type)
129 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
131 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
133 if (opt1->key->len != opt2->key->len)
135 if (opt1->key->key && !opt2->key->key)
137 if (!opt1->key->key && opt2->key->key)
139 if (opt1->key->key && opt2->key->key) {
140 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
146 /* any matching mon ip implies a match */
147 for (i = 0; i < opt1->num_mon; i++) {
148 if (ceph_monmap_contains(client->monc.monmap,
154 EXPORT_SYMBOL(ceph_compare_options);
157 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
164 dout("parse_fsid '%s'\n", str);
166 while (*str && i < 16) {
171 if (!isxdigit(str[0]) || !isxdigit(str[1]))
175 if (sscanf(tmp, "%x", &d) < 1)
177 fsid->fsid[i] = d & 0xff;
184 dout("parse_fsid ret %d got fsid %pU", err, fsid);
193 Opt_osdkeepalivetimeout,
204 /* string args above */
211 static match_table_t opt_tokens = {
212 {Opt_osdtimeout, "osdtimeout=%d"},
213 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
214 {Opt_mount_timeout, "mount_timeout=%d"},
215 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
217 {Opt_fsid, "fsid=%s"},
218 {Opt_name, "name=%s"},
219 {Opt_secret, "secret=%s"},
222 /* string args above */
223 {Opt_share, "share"},
224 {Opt_noshare, "noshare"},
226 {Opt_nocrc, "nocrc"},
230 void ceph_destroy_options(struct ceph_options *opt)
232 dout("destroy_options %p\n", opt);
235 ceph_crypto_key_destroy(opt->key);
238 kfree(opt->mon_addr);
241 EXPORT_SYMBOL(ceph_destroy_options);
243 /* get secret from key store */
244 static int get_secret(struct ceph_crypto_key *dst, const char *name) {
248 struct ceph_crypto_key *ckey;
250 ukey = request_key(&key_type_ceph, name, NULL);
251 if (!ukey || IS_ERR(ukey)) {
252 /* request_key errors don't map nicely to mount(2)
253 errors; don't even try, but still printk */
254 key_err = PTR_ERR(ukey);
257 pr_warning("ceph: Mount failed due to key not found: %s\n", name);
260 pr_warning("ceph: Mount failed due to expired key: %s\n", name);
263 pr_warning("ceph: Mount failed due to revoked key: %s\n", name);
266 pr_warning("ceph: Mount failed due to unknown key error"
267 " %d: %s\n", key_err, name);
273 ckey = ukey->payload.data;
274 err = ceph_crypto_key_clone(dst, ckey);
277 /* pass through, err is 0 */
285 struct ceph_options *
286 ceph_parse_options(char *options, const char *dev_name,
287 const char *dev_name_end,
288 int (*parse_extra_token)(char *c, void *private),
291 struct ceph_options *opt;
294 substring_t argstr[MAX_OPT_ARGS];
296 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
298 return ERR_PTR(-ENOMEM);
299 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
304 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
307 /* start with defaults */
308 opt->flags = CEPH_OPT_DEFAULT;
309 opt->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT;
310 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
311 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
312 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
315 /* ip1[:port1][,ip2[:port2]...] */
316 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
317 CEPH_MAX_MON, &opt->num_mon);
321 /* parse mount options */
322 while ((c = strsep(&options, ",")) != NULL) {
323 int token, intval, ret;
327 token = match_token((char *)c, opt_tokens, argstr);
328 if (token < 0 && parse_extra_token) {
330 err = parse_extra_token((char *)c, private);
332 pr_err("bad option at '%s'\n", c);
337 if (token < Opt_last_int) {
338 ret = match_int(&argstr[0], &intval);
340 pr_err("bad mount option arg (not int) "
344 dout("got int token %d val %d\n", token, intval);
345 } else if (token > Opt_last_int && token < Opt_last_string) {
346 dout("got string token %d val %s\n", token,
349 dout("got token %d\n", token);
353 err = ceph_parse_ips(argstr[0].from,
359 opt->flags |= CEPH_OPT_MYIP;
363 err = parse_fsid(argstr[0].from, &opt->fsid);
365 opt->flags |= CEPH_OPT_FSID;
368 opt->name = kstrndup(argstr[0].from,
369 argstr[0].to-argstr[0].from,
373 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
378 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
383 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
388 err = get_secret(opt->key, argstr[0].from);
395 opt->osd_timeout = intval;
397 case Opt_osdkeepalivetimeout:
398 opt->osd_keepalive_timeout = intval;
400 case Opt_osd_idle_ttl:
401 opt->osd_idle_ttl = intval;
403 case Opt_mount_timeout:
404 opt->mount_timeout = intval;
408 opt->flags &= ~CEPH_OPT_NOSHARE;
411 opt->flags |= CEPH_OPT_NOSHARE;
415 opt->flags &= ~CEPH_OPT_NOCRC;
418 opt->flags |= CEPH_OPT_NOCRC;
430 ceph_destroy_options(opt);
433 EXPORT_SYMBOL(ceph_parse_options);
435 u64 ceph_client_id(struct ceph_client *client)
437 return client->monc.auth->global_id;
439 EXPORT_SYMBOL(ceph_client_id);
442 * create a fresh client instance
444 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
445 unsigned int supported_features,
446 unsigned int required_features)
448 struct ceph_client *client;
449 struct ceph_entity_addr *myaddr = NULL;
452 client = kzalloc(sizeof(*client), GFP_KERNEL);
454 return ERR_PTR(-ENOMEM);
456 client->private = private;
457 client->options = opt;
459 mutex_init(&client->mount_mutex);
460 init_waitqueue_head(&client->auth_wq);
461 client->auth_err = 0;
463 client->extra_mon_dispatch = NULL;
464 client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
466 client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
470 if (ceph_test_opt(client, MYIP))
471 myaddr = &client->options->my_addr;
472 ceph_messenger_init(&client->msgr, myaddr,
473 client->supported_features,
474 client->required_features,
475 ceph_test_opt(client, NOCRC));
478 err = ceph_monc_init(&client->monc, client);
481 err = ceph_osdc_init(&client->osdc, client);
488 ceph_monc_stop(&client->monc);
493 EXPORT_SYMBOL(ceph_create_client);
495 void ceph_destroy_client(struct ceph_client *client)
497 dout("destroy_client %p\n", client);
499 atomic_set(&client->msgr.stopping, 1);
502 ceph_osdc_stop(&client->osdc);
504 ceph_monc_stop(&client->monc);
506 ceph_debugfs_client_cleanup(client);
508 ceph_destroy_options(client->options);
511 dout("destroy_client %p done\n", client);
513 EXPORT_SYMBOL(ceph_destroy_client);
516 * true if we have the mon map (and have thus joined the cluster)
518 static int have_mon_and_osd_map(struct ceph_client *client)
520 return client->monc.monmap && client->monc.monmap->epoch &&
521 client->osdc.osdmap && client->osdc.osdmap->epoch;
525 * mount: join the ceph cluster, and open root directory.
527 int __ceph_open_session(struct ceph_client *client, unsigned long started)
530 unsigned long timeout = client->options->mount_timeout * HZ;
532 /* open session, and wait for mon and osd maps */
533 err = ceph_monc_open_session(&client->monc);
537 while (!have_mon_and_osd_map(client)) {
539 if (timeout && time_after_eq(jiffies, started + timeout))
543 dout("mount waiting for mon_map\n");
544 err = wait_event_interruptible_timeout(client->auth_wq,
545 have_mon_and_osd_map(client) || (client->auth_err < 0),
547 if (err == -EINTR || err == -ERESTARTSYS)
549 if (client->auth_err < 0)
550 return client->auth_err;
555 EXPORT_SYMBOL(__ceph_open_session);
558 int ceph_open_session(struct ceph_client *client)
561 unsigned long started = jiffies; /* note the start time */
563 dout("open_session start\n");
564 mutex_lock(&client->mount_mutex);
566 ret = __ceph_open_session(client, started);
568 mutex_unlock(&client->mount_mutex);
571 EXPORT_SYMBOL(ceph_open_session);
574 static int __init init_ceph_lib(void)
578 ret = ceph_debugfs_init();
582 ret = ceph_crypto_init();
586 ret = ceph_msgr_init();
590 pr_info("loaded (mon/osd proto %d/%d, osdmap %d/%d %d/%d)\n",
591 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL,
592 CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT,
593 CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT);
598 ceph_crypto_shutdown();
600 ceph_debugfs_cleanup();
605 static void __exit exit_ceph_lib(void)
607 dout("exit_ceph_lib\n");
609 ceph_crypto_shutdown();
610 ceph_debugfs_cleanup();
613 module_init(init_ceph_lib);
614 module_exit(exit_ceph_lib);
616 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
617 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
618 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
619 MODULE_DESCRIPTION("Ceph filesystem for Linux");
620 MODULE_LICENSE("GPL");