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/libceph.h>
21 #include <linux/ceph/debugfs.h>
22 #include <linux/ceph/decode.h>
23 #include <linux/ceph/mon_client.h>
24 #include <linux/ceph/auth.h>
30 * find filename portion of a path (/foo/bar/baz -> baz)
32 const char *ceph_file_part(const char *s, int len)
34 const char *e = s + len;
36 while (e != s && *(e-1) != '/')
40 EXPORT_SYMBOL(ceph_file_part);
42 const char *ceph_msg_type_name(int type)
45 case CEPH_MSG_SHUTDOWN: return "shutdown";
46 case CEPH_MSG_PING: return "ping";
47 case CEPH_MSG_AUTH: return "auth";
48 case CEPH_MSG_AUTH_REPLY: return "auth_reply";
49 case CEPH_MSG_MON_MAP: return "mon_map";
50 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
51 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
52 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
53 case CEPH_MSG_STATFS: return "statfs";
54 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
55 case CEPH_MSG_MDS_MAP: return "mds_map";
56 case CEPH_MSG_CLIENT_SESSION: return "client_session";
57 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
58 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
59 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
60 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
61 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
62 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
63 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
64 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
65 case CEPH_MSG_OSD_MAP: return "osd_map";
66 case CEPH_MSG_OSD_OP: return "osd_op";
67 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
68 case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
69 default: return "unknown";
72 EXPORT_SYMBOL(ceph_msg_type_name);
75 * Initially learn our fsid, or verify an fsid matches.
77 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
79 if (client->have_fsid) {
80 if (ceph_fsid_compare(&client->fsid, fsid)) {
81 pr_err("bad fsid, had %pU got %pU",
86 pr_info("client%lld fsid %pU\n", ceph_client_id(client), fsid);
87 memcpy(&client->fsid, fsid, sizeof(*fsid));
88 ceph_debugfs_client_init(client);
89 client->have_fsid = true;
93 EXPORT_SYMBOL(ceph_check_fsid);
95 static int strcmp_null(const char *s1, const char *s2)
103 return strcmp(s1, s2);
106 int ceph_compare_options(struct ceph_options *new_opt,
107 struct ceph_client *client)
109 struct ceph_options *opt1 = new_opt;
110 struct ceph_options *opt2 = client->options;
111 int ofs = offsetof(struct ceph_options, mon_addr);
115 ret = memcmp(opt1, opt2, ofs);
119 ret = strcmp_null(opt1->name, opt2->name);
123 if (opt1->key && !opt2->key)
125 if (!opt1->key && opt2->key)
127 if (opt1->key && opt2->key) {
128 if (opt1->key->type != opt2->key->type)
130 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
132 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
134 if (opt1->key->len != opt2->key->len)
136 if (opt1->key->key && !opt2->key->key)
138 if (!opt1->key->key && opt2->key->key)
140 if (opt1->key->key && opt2->key->key) {
141 ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
147 /* any matching mon ip implies a match */
148 for (i = 0; i < opt1->num_mon; i++) {
149 if (ceph_monmap_contains(client->monc.monmap,
155 EXPORT_SYMBOL(ceph_compare_options);
158 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
165 dout("parse_fsid '%s'\n", str);
167 while (*str && i < 16) {
172 if (!isxdigit(str[0]) || !isxdigit(str[1]))
176 if (sscanf(tmp, "%x", &d) < 1)
178 fsid->fsid[i] = d & 0xff;
185 dout("parse_fsid ret %d got fsid %pU", err, fsid);
194 Opt_osdkeepalivetimeout,
205 /* string args above */
210 static match_table_t opt_tokens = {
211 {Opt_osdtimeout, "osdtimeout=%d"},
212 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
213 {Opt_mount_timeout, "mount_timeout=%d"},
214 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
216 {Opt_fsid, "fsid=%s"},
217 {Opt_name, "name=%s"},
218 {Opt_secret, "secret=%s"},
221 /* string args above */
222 {Opt_noshare, "noshare"},
223 {Opt_nocrc, "nocrc"},
227 void ceph_destroy_options(struct ceph_options *opt)
229 dout("destroy_options %p\n", opt);
232 ceph_crypto_key_destroy(opt->key);
237 EXPORT_SYMBOL(ceph_destroy_options);
239 /* get secret from key store */
240 static int get_secret(struct ceph_crypto_key *dst, const char *name) {
244 struct ceph_crypto_key *ckey;
246 ukey = request_key(&key_type_ceph, name, NULL);
247 if (!ukey || IS_ERR(ukey)) {
248 /* request_key errors don't map nicely to mount(2)
249 errors; don't even try, but still printk */
250 key_err = PTR_ERR(ukey);
253 pr_warning("ceph: Mount failed due to key not found: %s\n", name);
256 pr_warning("ceph: Mount failed due to expired key: %s\n", name);
259 pr_warning("ceph: Mount failed due to revoked key: %s\n", name);
262 pr_warning("ceph: Mount failed due to unknown key error"
263 " %d: %s\n", key_err, name);
269 ckey = ukey->payload.data;
270 err = ceph_crypto_key_clone(dst, ckey);
273 /* pass through, err is 0 */
281 int ceph_parse_options(struct ceph_options **popt, char *options,
282 const char *dev_name, const char *dev_name_end,
283 int (*parse_extra_token)(char *c, void *private),
286 struct ceph_options *opt;
289 substring_t argstr[MAX_OPT_ARGS];
291 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
294 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
299 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
302 /* start with defaults */
303 opt->flags = CEPH_OPT_DEFAULT;
304 opt->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT;
305 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
306 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
307 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
310 /* ip1[:port1][,ip2[:port2]...] */
311 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
312 CEPH_MAX_MON, &opt->num_mon);
316 /* parse mount options */
317 while ((c = strsep(&options, ",")) != NULL) {
318 int token, intval, ret;
322 token = match_token((char *)c, opt_tokens, argstr);
323 if (token < 0 && parse_extra_token) {
325 err = parse_extra_token((char *)c, private);
327 pr_err("bad option at '%s'\n", c);
332 if (token < Opt_last_int) {
333 ret = match_int(&argstr[0], &intval);
335 pr_err("bad mount option arg (not int) "
339 dout("got int token %d val %d\n", token, intval);
340 } else if (token > Opt_last_int && token < Opt_last_string) {
341 dout("got string token %d val %s\n", token,
344 dout("got token %d\n", token);
348 err = ceph_parse_ips(argstr[0].from,
354 opt->flags |= CEPH_OPT_MYIP;
358 err = parse_fsid(argstr[0].from, &opt->fsid);
360 opt->flags |= CEPH_OPT_FSID;
363 opt->name = kstrndup(argstr[0].from,
364 argstr[0].to-argstr[0].from,
368 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
373 err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
378 opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
383 err = get_secret(opt->key, argstr[0].from);
390 opt->osd_timeout = intval;
392 case Opt_osdkeepalivetimeout:
393 opt->osd_keepalive_timeout = intval;
395 case Opt_osd_idle_ttl:
396 opt->osd_idle_ttl = intval;
398 case Opt_mount_timeout:
399 opt->mount_timeout = intval;
403 opt->flags |= CEPH_OPT_NOSHARE;
407 opt->flags |= CEPH_OPT_NOCRC;
420 ceph_destroy_options(opt);
423 EXPORT_SYMBOL(ceph_parse_options);
425 u64 ceph_client_id(struct ceph_client *client)
427 return client->monc.auth->global_id;
429 EXPORT_SYMBOL(ceph_client_id);
432 * create a fresh client instance
434 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
436 struct ceph_client *client;
439 client = kzalloc(sizeof(*client), GFP_KERNEL);
441 return ERR_PTR(-ENOMEM);
443 client->private = private;
444 client->options = opt;
446 mutex_init(&client->mount_mutex);
447 init_waitqueue_head(&client->auth_wq);
448 client->auth_err = 0;
450 client->extra_mon_dispatch = NULL;
451 client->supported_features = CEPH_FEATURE_SUPPORTED_DEFAULT;
452 client->required_features = CEPH_FEATURE_REQUIRED_DEFAULT;
457 err = ceph_monc_init(&client->monc, client);
460 err = ceph_osdc_init(&client->osdc, client);
467 ceph_monc_stop(&client->monc);
472 EXPORT_SYMBOL(ceph_create_client);
474 void ceph_destroy_client(struct ceph_client *client)
476 dout("destroy_client %p\n", client);
479 ceph_osdc_stop(&client->osdc);
482 * make sure osd connections close out before destroying the
483 * auth module, which is needed to free those connections'
488 ceph_monc_stop(&client->monc);
490 ceph_debugfs_client_cleanup(client);
493 ceph_messenger_destroy(client->msgr);
495 ceph_destroy_options(client->options);
498 dout("destroy_client %p done\n", client);
500 EXPORT_SYMBOL(ceph_destroy_client);
503 * true if we have the mon map (and have thus joined the cluster)
505 static int have_mon_and_osd_map(struct ceph_client *client)
507 return client->monc.monmap && client->monc.monmap->epoch &&
508 client->osdc.osdmap && client->osdc.osdmap->epoch;
512 * mount: join the ceph cluster, and open root directory.
514 int __ceph_open_session(struct ceph_client *client, unsigned long started)
516 struct ceph_entity_addr *myaddr = NULL;
518 unsigned long timeout = client->options->mount_timeout * HZ;
520 /* initialize the messenger */
521 if (client->msgr == NULL) {
522 if (ceph_test_opt(client, MYIP))
523 myaddr = &client->options->my_addr;
524 client->msgr = ceph_messenger_create(myaddr,
525 client->supported_features,
526 client->required_features);
527 if (IS_ERR(client->msgr)) {
529 return PTR_ERR(client->msgr);
531 client->msgr->nocrc = ceph_test_opt(client, NOCRC);
534 /* open session, and wait for mon and osd maps */
535 err = ceph_monc_open_session(&client->monc);
539 while (!have_mon_and_osd_map(client)) {
541 if (timeout && time_after_eq(jiffies, started + timeout))
545 dout("mount waiting for mon_map\n");
546 err = wait_event_interruptible_timeout(client->auth_wq,
547 have_mon_and_osd_map(client) || (client->auth_err < 0),
549 if (err == -EINTR || err == -ERESTARTSYS)
551 if (client->auth_err < 0)
552 return client->auth_err;
557 EXPORT_SYMBOL(__ceph_open_session);
560 int ceph_open_session(struct ceph_client *client)
563 unsigned long started = jiffies; /* note the start time */
565 dout("open_session start\n");
566 mutex_lock(&client->mount_mutex);
568 ret = __ceph_open_session(client, started);
570 mutex_unlock(&client->mount_mutex);
573 EXPORT_SYMBOL(ceph_open_session);
576 static int __init init_ceph_lib(void)
580 ret = ceph_debugfs_init();
584 ret = ceph_crypto_init();
588 ret = ceph_msgr_init();
592 pr_info("loaded (mon/osd proto %d/%d, osdmap %d/%d %d/%d)\n",
593 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL,
594 CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT,
595 CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT);
600 ceph_crypto_shutdown();
602 ceph_debugfs_cleanup();
607 static void __exit exit_ceph_lib(void)
609 dout("exit_ceph_lib\n");
611 ceph_crypto_shutdown();
612 ceph_debugfs_cleanup();
615 module_init(init_ceph_lib);
616 module_exit(exit_ceph_lib);
618 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
619 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
620 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
621 MODULE_DESCRIPTION("Ceph filesystem for Linux");
622 MODULE_LICENSE("GPL");