2 #include <linux/ceph/ceph_debug.h>
3 #include <linux/backing-dev.h>
4 #include <linux/ctype.h>
6 #include <linux/inet.h>
8 #include <linux/module.h>
9 #include <linux/mount.h>
10 #include <linux/parser.h>
11 #include <linux/sched.h>
12 #include <linux/seq_file.h>
13 #include <linux/slab.h>
14 #include <linux/statfs.h>
15 #include <linux/string.h>
18 #include <linux/ceph/libceph.h>
19 #include <linux/ceph/debugfs.h>
20 #include <linux/ceph/decode.h>
21 #include <linux/ceph/mon_client.h>
22 #include <linux/ceph/auth.h>
27 * find filename portion of a path (/foo/bar/baz -> baz)
29 const char *ceph_file_part(const char *s, int len)
31 const char *e = s + len;
33 while (e != s && *(e-1) != '/')
37 EXPORT_SYMBOL(ceph_file_part);
39 const char *ceph_msg_type_name(int type)
42 case CEPH_MSG_SHUTDOWN: return "shutdown";
43 case CEPH_MSG_PING: return "ping";
44 case CEPH_MSG_AUTH: return "auth";
45 case CEPH_MSG_AUTH_REPLY: return "auth_reply";
46 case CEPH_MSG_MON_MAP: return "mon_map";
47 case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
48 case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
49 case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
50 case CEPH_MSG_STATFS: return "statfs";
51 case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
52 case CEPH_MSG_MDS_MAP: return "mds_map";
53 case CEPH_MSG_CLIENT_SESSION: return "client_session";
54 case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
55 case CEPH_MSG_CLIENT_REQUEST: return "client_request";
56 case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
57 case CEPH_MSG_CLIENT_REPLY: return "client_reply";
58 case CEPH_MSG_CLIENT_CAPS: return "client_caps";
59 case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
60 case CEPH_MSG_CLIENT_SNAP: return "client_snap";
61 case CEPH_MSG_CLIENT_LEASE: return "client_lease";
62 case CEPH_MSG_OSD_MAP: return "osd_map";
63 case CEPH_MSG_OSD_OP: return "osd_op";
64 case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
65 default: return "unknown";
68 EXPORT_SYMBOL(ceph_msg_type_name);
71 * Initially learn our fsid, or verify an fsid matches.
73 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
75 if (client->have_fsid) {
76 if (ceph_fsid_compare(&client->fsid, fsid)) {
77 pr_err("bad fsid, had %pU got %pU",
82 pr_info("client%lld fsid %pU\n", ceph_client_id(client), fsid);
83 memcpy(&client->fsid, fsid, sizeof(*fsid));
84 ceph_debugfs_client_init(client);
85 client->have_fsid = true;
89 EXPORT_SYMBOL(ceph_check_fsid);
91 static int strcmp_null(const char *s1, const char *s2)
99 return strcmp(s1, s2);
102 int ceph_compare_options(struct ceph_options *new_opt,
103 struct ceph_client *client)
105 struct ceph_options *opt1 = new_opt;
106 struct ceph_options *opt2 = client->options;
107 int ofs = offsetof(struct ceph_options, mon_addr);
111 ret = memcmp(opt1, opt2, ofs);
115 ret = strcmp_null(opt1->name, opt2->name);
119 ret = strcmp_null(opt1->secret, opt2->secret);
123 /* any matching mon ip implies a match */
124 for (i = 0; i < opt1->num_mon; i++) {
125 if (ceph_monmap_contains(client->monc.monmap,
131 EXPORT_SYMBOL(ceph_compare_options);
134 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
141 dout("parse_fsid '%s'\n", str);
143 while (*str && i < 16) {
148 if (!isxdigit(str[0]) || !isxdigit(str[1]))
152 if (sscanf(tmp, "%x", &d) < 1)
154 fsid->fsid[i] = d & 0xff;
161 dout("parse_fsid ret %d got fsid %pU", err, fsid);
170 Opt_osdkeepalivetimeout,
180 /* string args above */
185 static match_table_t opt_tokens = {
186 {Opt_osdtimeout, "osdtimeout=%d"},
187 {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
188 {Opt_mount_timeout, "mount_timeout=%d"},
189 {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
191 {Opt_fsid, "fsid=%s"},
192 {Opt_name, "name=%s"},
193 {Opt_secret, "secret=%s"},
195 /* string args above */
196 {Opt_noshare, "noshare"},
197 {Opt_nocrc, "nocrc"},
201 void ceph_destroy_options(struct ceph_options *opt)
203 dout("destroy_options %p\n", opt);
208 EXPORT_SYMBOL(ceph_destroy_options);
210 int ceph_parse_options(struct ceph_options **popt, char *options,
211 const char *dev_name, const char *dev_name_end,
212 int (*parse_extra_token)(char *c, void *private),
215 struct ceph_options *opt;
218 substring_t argstr[MAX_OPT_ARGS];
220 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
223 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
228 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
231 /* start with defaults */
232 opt->flags = CEPH_OPT_DEFAULT;
233 opt->osd_timeout = CEPH_OSD_TIMEOUT_DEFAULT;
234 opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
235 opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
236 opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
239 /* ip1[:port1][,ip2[:port2]...] */
240 err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
241 CEPH_MAX_MON, &opt->num_mon);
245 /* parse mount options */
246 while ((c = strsep(&options, ",")) != NULL) {
247 int token, intval, ret;
251 token = match_token((char *)c, opt_tokens, argstr);
252 if (token < 0 && parse_extra_token) {
254 err = parse_extra_token((char *)c, private);
256 pr_err("bad option at '%s'\n", c);
261 if (token < Opt_last_int) {
262 ret = match_int(&argstr[0], &intval);
264 pr_err("bad mount option arg (not int) "
268 dout("got int token %d val %d\n", token, intval);
269 } else if (token > Opt_last_int && token < Opt_last_string) {
270 dout("got string token %d val %s\n", token,
273 dout("got token %d\n", token);
277 err = ceph_parse_ips(argstr[0].from,
283 opt->flags |= CEPH_OPT_MYIP;
287 err = parse_fsid(argstr[0].from, &opt->fsid);
289 opt->flags |= CEPH_OPT_FSID;
292 opt->name = kstrndup(argstr[0].from,
293 argstr[0].to-argstr[0].from,
297 opt->secret = kstrndup(argstr[0].from,
298 argstr[0].to-argstr[0].from,
304 opt->osd_timeout = intval;
306 case Opt_osdkeepalivetimeout:
307 opt->osd_keepalive_timeout = intval;
309 case Opt_osd_idle_ttl:
310 opt->osd_idle_ttl = intval;
312 case Opt_mount_timeout:
313 opt->mount_timeout = intval;
317 opt->flags |= CEPH_OPT_NOSHARE;
321 opt->flags |= CEPH_OPT_NOCRC;
334 ceph_destroy_options(opt);
337 EXPORT_SYMBOL(ceph_parse_options);
339 u64 ceph_client_id(struct ceph_client *client)
341 return client->monc.auth->global_id;
343 EXPORT_SYMBOL(ceph_client_id);
346 * create a fresh client instance
348 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
350 struct ceph_client *client;
353 client = kzalloc(sizeof(*client), GFP_KERNEL);
355 return ERR_PTR(-ENOMEM);
357 client->private = private;
358 client->options = opt;
360 mutex_init(&client->mount_mutex);
361 init_waitqueue_head(&client->auth_wq);
362 client->auth_err = 0;
364 client->extra_mon_dispatch = NULL;
365 client->supported_features = CEPH_FEATURE_SUPPORTED_DEFAULT;
366 client->required_features = CEPH_FEATURE_REQUIRED_DEFAULT;
371 err = ceph_monc_init(&client->monc, client);
374 err = ceph_osdc_init(&client->osdc, client);
381 ceph_monc_stop(&client->monc);
386 EXPORT_SYMBOL(ceph_create_client);
388 void ceph_destroy_client(struct ceph_client *client)
390 dout("destroy_client %p\n", client);
393 ceph_osdc_stop(&client->osdc);
396 * make sure mds and osd connections close out before destroying
397 * the auth module, which is needed to free those connections'
402 ceph_monc_stop(&client->monc);
404 ceph_debugfs_client_cleanup(client);
407 ceph_messenger_destroy(client->msgr);
409 ceph_destroy_options(client->options);
412 dout("destroy_client %p done\n", client);
414 EXPORT_SYMBOL(ceph_destroy_client);
417 * true if we have the mon map (and have thus joined the cluster)
419 static int have_mon_and_osd_map(struct ceph_client *client)
421 return client->monc.monmap && client->monc.monmap->epoch &&
422 client->osdc.osdmap && client->osdc.osdmap->epoch;
426 * mount: join the ceph cluster, and open root directory.
428 int __ceph_open_session(struct ceph_client *client, unsigned long started)
430 struct ceph_entity_addr *myaddr = NULL;
432 unsigned long timeout = client->options->mount_timeout * HZ;
434 /* initialize the messenger */
435 if (client->msgr == NULL) {
436 if (ceph_test_opt(client, MYIP))
437 myaddr = &client->options->my_addr;
438 client->msgr = ceph_messenger_create(myaddr,
439 client->supported_features,
440 client->required_features);
441 if (IS_ERR(client->msgr)) {
443 return PTR_ERR(client->msgr);
445 client->msgr->nocrc = ceph_test_opt(client, NOCRC);
448 /* open session, and wait for mon and osd maps */
449 err = ceph_monc_open_session(&client->monc);
453 while (!have_mon_and_osd_map(client)) {
455 if (timeout && time_after_eq(jiffies, started + timeout))
459 dout("mount waiting for mon_map\n");
460 err = wait_event_interruptible_timeout(client->auth_wq,
461 have_mon_and_osd_map(client) || (client->auth_err < 0),
463 if (err == -EINTR || err == -ERESTARTSYS)
465 if (client->auth_err < 0)
466 return client->auth_err;
471 EXPORT_SYMBOL(__ceph_open_session);
474 int ceph_open_session(struct ceph_client *client)
477 unsigned long started = jiffies; /* note the start time */
479 dout("open_session start\n");
480 mutex_lock(&client->mount_mutex);
482 ret = __ceph_open_session(client, started);
484 mutex_unlock(&client->mount_mutex);
487 EXPORT_SYMBOL(ceph_open_session);
490 static int __init init_ceph_lib(void)
494 ret = ceph_debugfs_init();
498 ret = ceph_msgr_init();
502 pr_info("loaded (mon/osd proto %d/%d, osdmap %d/%d %d/%d)\n",
503 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL,
504 CEPH_OSDMAP_VERSION, CEPH_OSDMAP_VERSION_EXT,
505 CEPH_OSDMAP_INC_VERSION, CEPH_OSDMAP_INC_VERSION_EXT);
510 ceph_debugfs_cleanup();
515 static void __exit exit_ceph_lib(void)
517 dout("exit_ceph_lib\n");
519 ceph_debugfs_cleanup();
522 module_init(init_ceph_lib);
523 module_exit(exit_ceph_lib);
525 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
526 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
527 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
528 MODULE_DESCRIPTION("Ceph filesystem for Linux");
529 MODULE_LICENSE("GPL");