aboutsummaryrefslogtreecommitdiffstats
path: root/net/ceph/ceph_common.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ceph/ceph_common.c')
-rw-r--r--net/ceph/ceph_common.c529
1 files changed, 529 insertions, 0 deletions
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
new file mode 100644
index 000000000000..f3e4a13fea0c
--- /dev/null
+++ b/net/ceph/ceph_common.c
@@ -0,0 +1,529 @@
1
2#include <linux/ceph/ceph_debug.h>
3#include <linux/backing-dev.h>
4#include <linux/ctype.h>
5#include <linux/fs.h>
6#include <linux/inet.h>
7#include <linux/in6.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>
16
17
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>
23
24
25
26/*
27 * find filename portion of a path (/foo/bar/baz -> baz)
28 */
29const char *ceph_file_part(const char *s, int len)
30{
31 const char *e = s + len;
32
33 while (e != s && *(e-1) != '/')
34 e--;
35 return e;
36}
37EXPORT_SYMBOL(ceph_file_part);
38
39const char *ceph_msg_type_name(int type)
40{
41 switch (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";
66 }
67}
68EXPORT_SYMBOL(ceph_msg_type_name);
69
70/*
71 * Initially learn our fsid, or verify an fsid matches.
72 */
73int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
74{
75 if (client->have_fsid) {
76 if (ceph_fsid_compare(&client->fsid, fsid)) {
77 pr_err("bad fsid, had %pU got %pU",
78 &client->fsid, fsid);
79 return -1;
80 }
81 } else {
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;
86 }
87 return 0;
88}
89EXPORT_SYMBOL(ceph_check_fsid);
90
91static int strcmp_null(const char *s1, const char *s2)
92{
93 if (!s1 && !s2)
94 return 0;
95 if (s1 && !s2)
96 return -1;
97 if (!s1 && s2)
98 return 1;
99 return strcmp(s1, s2);
100}
101
102int ceph_compare_options(struct ceph_options *new_opt,
103 struct ceph_client *client)
104{
105 struct ceph_options *opt1 = new_opt;
106 struct ceph_options *opt2 = client->options;
107 int ofs = offsetof(struct ceph_options, mon_addr);
108 int i;
109 int ret;
110
111 ret = memcmp(opt1, opt2, ofs);
112 if (ret)
113 return ret;
114
115 ret = strcmp_null(opt1->name, opt2->name);
116 if (ret)
117 return ret;
118
119 ret = strcmp_null(opt1->secret, opt2->secret);
120 if (ret)
121 return ret;
122
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,
126 &opt1->mon_addr[i]))
127 return 0;
128 }
129 return -1;
130}
131EXPORT_SYMBOL(ceph_compare_options);
132
133
134static int parse_fsid(const char *str, struct ceph_fsid *fsid)
135{
136 int i = 0;
137 char tmp[3];
138 int err = -EINVAL;
139 int d;
140
141 dout("parse_fsid '%s'\n", str);
142 tmp[2] = 0;
143 while (*str && i < 16) {
144 if (ispunct(*str)) {
145 str++;
146 continue;
147 }
148 if (!isxdigit(str[0]) || !isxdigit(str[1]))
149 break;
150 tmp[0] = str[0];
151 tmp[1] = str[1];
152 if (sscanf(tmp, "%x", &d) < 1)
153 break;
154 fsid->fsid[i] = d & 0xff;
155 i++;
156 str += 2;
157 }
158
159 if (i == 16)
160 err = 0;
161 dout("parse_fsid ret %d got fsid %pU", err, fsid);
162 return err;
163}
164
165/*
166 * ceph options
167 */
168enum {
169 Opt_osdtimeout,
170 Opt_osdkeepalivetimeout,
171 Opt_mount_timeout,
172 Opt_osd_idle_ttl,
173 Opt_last_int,
174 /* int args above */
175 Opt_fsid,
176 Opt_name,
177 Opt_secret,
178 Opt_ip,
179 Opt_last_string,
180 /* string args above */
181 Opt_noshare,
182 Opt_nocrc,
183};
184
185static 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"},
190 /* int args above */
191 {Opt_fsid, "fsid=%s"},
192 {Opt_name, "name=%s"},
193 {Opt_secret, "secret=%s"},
194 {Opt_ip, "ip=%s"},
195 /* string args above */
196 {Opt_noshare, "noshare"},
197 {Opt_nocrc, "nocrc"},
198 {-1, NULL}
199};
200
201void ceph_destroy_options(struct ceph_options *opt)
202{
203 dout("destroy_options %p\n", opt);
204 kfree(opt->name);
205 kfree(opt->secret);
206 kfree(opt);
207}
208EXPORT_SYMBOL(ceph_destroy_options);
209
210int 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),
213 void *private)
214{
215 struct ceph_options *opt;
216 const char *c;
217 int err = -ENOMEM;
218 substring_t argstr[MAX_OPT_ARGS];
219
220 opt = kzalloc(sizeof(*opt), GFP_KERNEL);
221 if (!opt)
222 return err;
223 opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
224 GFP_KERNEL);
225 if (!opt->mon_addr)
226 goto out;
227
228 dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
229 dev_name);
230
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 */
237
238 /* get mon ip(s) */
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);
242 if (err < 0)
243 goto out;
244
245 /* parse mount options */
246 while ((c = strsep(&options, ",")) != NULL) {
247 int token, intval, ret;
248 if (!*c)
249 continue;
250 err = -EINVAL;
251 token = match_token((char *)c, opt_tokens, argstr);
252 if (token < 0 && parse_extra_token) {
253 /* extra? */
254 err = parse_extra_token((char *)c, private);
255 if (err < 0) {
256 pr_err("bad option at '%s'\n", c);
257 goto out;
258 }
259 continue;
260 }
261 if (token < Opt_last_int) {
262 ret = match_int(&argstr[0], &intval);
263 if (ret < 0) {
264 pr_err("bad mount option arg (not int) "
265 "at '%s'\n", c);
266 continue;
267 }
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,
271 argstr[0].from);
272 } else {
273 dout("got token %d\n", token);
274 }
275 switch (token) {
276 case Opt_ip:
277 err = ceph_parse_ips(argstr[0].from,
278 argstr[0].to,
279 &opt->my_addr,
280 1, NULL);
281 if (err < 0)
282 goto out;
283 opt->flags |= CEPH_OPT_MYIP;
284 break;
285
286 case Opt_fsid:
287 err = parse_fsid(argstr[0].from, &opt->fsid);
288 if (err == 0)
289 opt->flags |= CEPH_OPT_FSID;
290 break;
291 case Opt_name:
292 opt->name = kstrndup(argstr[0].from,
293 argstr[0].to-argstr[0].from,
294 GFP_KERNEL);
295 break;
296 case Opt_secret:
297 opt->secret = kstrndup(argstr[0].from,
298 argstr[0].to-argstr[0].from,
299 GFP_KERNEL);
300 break;
301
302 /* misc */
303 case Opt_osdtimeout:
304 opt->osd_timeout = intval;
305 break;
306 case Opt_osdkeepalivetimeout:
307 opt->osd_keepalive_timeout = intval;
308 break;
309 case Opt_osd_idle_ttl:
310 opt->osd_idle_ttl = intval;
311 break;
312 case Opt_mount_timeout:
313 opt->mount_timeout = intval;
314 break;
315
316 case Opt_noshare:
317 opt->flags |= CEPH_OPT_NOSHARE;
318 break;
319
320 case Opt_nocrc:
321 opt->flags |= CEPH_OPT_NOCRC;
322 break;
323
324 default:
325 BUG_ON(token);
326 }
327 }
328
329 /* success */
330 *popt = opt;
331 return 0;
332
333out:
334 ceph_destroy_options(opt);
335 return err;
336}
337EXPORT_SYMBOL(ceph_parse_options);
338
339u64 ceph_client_id(struct ceph_client *client)
340{
341 return client->monc.auth->global_id;
342}
343EXPORT_SYMBOL(ceph_client_id);
344
345/*
346 * create a fresh client instance
347 */
348struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
349{
350 struct ceph_client *client;
351 int err = -ENOMEM;
352
353 client = kzalloc(sizeof(*client), GFP_KERNEL);
354 if (client == NULL)
355 return ERR_PTR(-ENOMEM);
356
357 client->private = private;
358 client->options = opt;
359
360 mutex_init(&client->mount_mutex);
361 init_waitqueue_head(&client->auth_wq);
362 client->auth_err = 0;
363
364 client->extra_mon_dispatch = NULL;
365 client->supported_features = CEPH_FEATURE_SUPPORTED_DEFAULT;
366 client->required_features = CEPH_FEATURE_REQUIRED_DEFAULT;
367
368 client->msgr = NULL;
369
370 /* subsystems */
371 err = ceph_monc_init(&client->monc, client);
372 if (err < 0)
373 goto fail;
374 err = ceph_osdc_init(&client->osdc, client);
375 if (err < 0)
376 goto fail_monc;
377
378 return client;
379
380fail_monc:
381 ceph_monc_stop(&client->monc);
382fail:
383 kfree(client);
384 return ERR_PTR(err);
385}
386EXPORT_SYMBOL(ceph_create_client);
387
388void ceph_destroy_client(struct ceph_client *client)
389{
390 dout("destroy_client %p\n", client);
391
392 /* unmount */
393 ceph_osdc_stop(&client->osdc);
394
395 /*
396 * make sure mds and osd connections close out before destroying
397 * the auth module, which is needed to free those connections'
398 * ceph_authorizers.
399 */
400 ceph_msgr_flush();
401
402 ceph_monc_stop(&client->monc);
403
404 ceph_debugfs_client_cleanup(client);
405
406 if (client->msgr)
407 ceph_messenger_destroy(client->msgr);
408
409 ceph_destroy_options(client->options);
410
411 kfree(client);
412 dout("destroy_client %p done\n", client);
413}
414EXPORT_SYMBOL(ceph_destroy_client);
415
416/*
417 * true if we have the mon map (and have thus joined the cluster)
418 */
419static int have_mon_and_osd_map(struct ceph_client *client)
420{
421 return client->monc.monmap && client->monc.monmap->epoch &&
422 client->osdc.osdmap && client->osdc.osdmap->epoch;
423}
424
425/*
426 * mount: join the ceph cluster, and open root directory.
427 */
428int __ceph_open_session(struct ceph_client *client, unsigned long started)
429{
430 struct ceph_entity_addr *myaddr = NULL;
431 int err;
432 unsigned long timeout = client->options->mount_timeout * HZ;
433
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)) {
442 client->msgr = NULL;
443 return PTR_ERR(client->msgr);
444 }
445 client->msgr->nocrc = ceph_test_opt(client, NOCRC);
446 }
447
448 /* open session, and wait for mon and osd maps */
449 err = ceph_monc_open_session(&client->monc);
450 if (err < 0)
451 return err;
452
453 while (!have_mon_and_osd_map(client)) {
454 err = -EIO;
455 if (timeout && time_after_eq(jiffies, started + timeout))
456 return err;
457
458 /* wait */
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),
462 timeout);
463 if (err == -EINTR || err == -ERESTARTSYS)
464 return err;
465 if (client->auth_err < 0)
466 return client->auth_err;
467 }
468
469 return 0;
470}
471EXPORT_SYMBOL(__ceph_open_session);
472
473
474int ceph_open_session(struct ceph_client *client)
475{
476 int ret;
477 unsigned long started = jiffies; /* note the start time */
478
479 dout("open_session start\n");
480 mutex_lock(&client->mount_mutex);
481
482 ret = __ceph_open_session(client, started);
483
484 mutex_unlock(&client->mount_mutex);
485 return ret;
486}
487EXPORT_SYMBOL(ceph_open_session);
488
489
490static int __init init_ceph_lib(void)
491{
492 int ret = 0;
493
494 ret = ceph_debugfs_init();
495 if (ret < 0)
496 goto out;
497
498 ret = ceph_msgr_init();
499 if (ret < 0)
500 goto out_debugfs;
501
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);
506
507 return 0;
508
509out_debugfs:
510 ceph_debugfs_cleanup();
511out:
512 return ret;
513}
514
515static void __exit exit_ceph_lib(void)
516{
517 dout("exit_ceph_lib\n");
518 ceph_msgr_exit();
519 ceph_debugfs_cleanup();
520}
521
522module_init(init_ceph_lib);
523module_exit(exit_ceph_lib);
524
525MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
526MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
527MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
528MODULE_DESCRIPTION("Ceph filesystem for Linux");
529MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-10-24 00:35:54 -0400