~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/ceph/ceph_common.c

Version: ~ [ linux-5.14-rc3 ] ~ [ linux-5.13.5 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.53 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.135 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.198 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.240 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.276 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.276 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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/key.h>
  9 #include <keys/ceph-type.h>
 10 #include <linux/module.h>
 11 #include <linux/mount.h>
 12 #include <linux/nsproxy.h>
 13 #include <linux/parser.h>
 14 #include <linux/sched.h>
 15 #include <linux/seq_file.h>
 16 #include <linux/slab.h>
 17 #include <linux/statfs.h>
 18 #include <linux/string.h>
 19 #include <linux/vmalloc.h>
 20 
 21 
 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>
 28 #include "crypto.h"
 29 
 30 
 31 /*
 32  * Module compatibility interface.  For now it doesn't do anything,
 33  * but its existence signals a certain level of functionality.
 34  *
 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.
 39  *
 40  * The data pointer can be null.
 41  */
 42 bool libceph_compatible(void *data)
 43 {
 44         return true;
 45 }
 46 EXPORT_SYMBOL(libceph_compatible);
 47 
 48 /*
 49  * find filename portion of a path (/foo/bar/baz -> baz)
 50  */
 51 const char *ceph_file_part(const char *s, int len)
 52 {
 53         const char *e = s + len;
 54 
 55         while (e != s && *(e-1) != '/')
 56                 e--;
 57         return e;
 58 }
 59 EXPORT_SYMBOL(ceph_file_part);
 60 
 61 const char *ceph_msg_type_name(int type)
 62 {
 63         switch (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_MON_GET_VERSION: return "mon_get_version";
 75         case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply";
 76         case CEPH_MSG_MDS_MAP: return "mds_map";
 77         case CEPH_MSG_CLIENT_SESSION: return "client_session";
 78         case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
 79         case CEPH_MSG_CLIENT_REQUEST: return "client_request";
 80         case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
 81         case CEPH_MSG_CLIENT_REPLY: return "client_reply";
 82         case CEPH_MSG_CLIENT_CAPS: return "client_caps";
 83         case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
 84         case CEPH_MSG_CLIENT_SNAP: return "client_snap";
 85         case CEPH_MSG_CLIENT_LEASE: return "client_lease";
 86         case CEPH_MSG_OSD_MAP: return "osd_map";
 87         case CEPH_MSG_OSD_OP: return "osd_op";
 88         case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
 89         case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
 90         default: return "unknown";
 91         }
 92 }
 93 EXPORT_SYMBOL(ceph_msg_type_name);
 94 
 95 /*
 96  * Initially learn our fsid, or verify an fsid matches.
 97  */
 98 int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
 99 {
100         if (client->have_fsid) {
101                 if (ceph_fsid_compare(&client->fsid, fsid)) {
102                         pr_err("bad fsid, had %pU got %pU",
103                                &client->fsid, fsid);
104                         return -1;
105                 }
106         } else {
107                 memcpy(&client->fsid, fsid, sizeof(*fsid));
108         }
109         return 0;
110 }
111 EXPORT_SYMBOL(ceph_check_fsid);
112 
113 static int strcmp_null(const char *s1, const char *s2)
114 {
115         if (!s1 && !s2)
116                 return 0;
117         if (s1 && !s2)
118                 return -1;
119         if (!s1 && s2)
120                 return 1;
121         return strcmp(s1, s2);
122 }
123 
124 int ceph_compare_options(struct ceph_options *new_opt,
125                          struct ceph_client *client)
126 {
127         struct ceph_options *opt1 = new_opt;
128         struct ceph_options *opt2 = client->options;
129         int ofs = offsetof(struct ceph_options, mon_addr);
130         int i;
131         int ret;
132 
133         /*
134          * Don't bother comparing options if network namespaces don't
135          * match.
136          */
137         if (!net_eq(current->nsproxy->net_ns, read_pnet(&client->msgr.net)))
138                 return -1;
139 
140         ret = memcmp(opt1, opt2, ofs);
141         if (ret)
142                 return ret;
143 
144         ret = strcmp_null(opt1->name, opt2->name);
145         if (ret)
146                 return ret;
147 
148         if (opt1->key && !opt2->key)
149                 return -1;
150         if (!opt1->key && opt2->key)
151                 return 1;
152         if (opt1->key && opt2->key) {
153                 if (opt1->key->type != opt2->key->type)
154                         return -1;
155                 if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
156                         return -1;
157                 if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
158                         return -1;
159                 if (opt1->key->len != opt2->key->len)
160                         return -1;
161                 if (opt1->key->key && !opt2->key->key)
162                         return -1;
163                 if (!opt1->key->key && opt2->key->key)
164                         return 1;
165                 if (opt1->key->key && opt2->key->key) {
166                         ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
167                         if (ret)
168                                 return ret;
169                 }
170         }
171 
172         /* any matching mon ip implies a match */
173         for (i = 0; i < opt1->num_mon; i++) {
174                 if (ceph_monmap_contains(client->monc.monmap,
175                                  &opt1->mon_addr[i]))
176                         return 0;
177         }
178         return -1;
179 }
180 EXPORT_SYMBOL(ceph_compare_options);
181 
182 void *ceph_kvmalloc(size_t size, gfp_t flags)
183 {
184         if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
185                 void *ptr = kmalloc(size, flags | __GFP_NOWARN);
186                 if (ptr)
187                         return ptr;
188         }
189 
190         return __vmalloc(size, flags | __GFP_HIGHMEM, PAGE_KERNEL);
191 }
192 
193 
194 static int parse_fsid(const char *str, struct ceph_fsid *fsid)
195 {
196         int i = 0;
197         char tmp[3];
198         int err = -EINVAL;
199         int d;
200 
201         dout("parse_fsid '%s'\n", str);
202         tmp[2] = 0;
203         while (*str && i < 16) {
204                 if (ispunct(*str)) {
205                         str++;
206                         continue;
207                 }
208                 if (!isxdigit(str[0]) || !isxdigit(str[1]))
209                         break;
210                 tmp[0] = str[0];
211                 tmp[1] = str[1];
212                 if (sscanf(tmp, "%x", &d) < 1)
213                         break;
214                 fsid->fsid[i] = d & 0xff;
215                 i++;
216                 str += 2;
217         }
218 
219         if (i == 16)
220                 err = 0;
221         dout("parse_fsid ret %d got fsid %pU", err, fsid);
222         return err;
223 }
224 
225 /*
226  * ceph options
227  */
228 enum {
229         Opt_osdtimeout,
230         Opt_osdkeepalivetimeout,
231         Opt_mount_timeout,
232         Opt_osd_idle_ttl,
233         Opt_last_int,
234         /* int args above */
235         Opt_fsid,
236         Opt_name,
237         Opt_secret,
238         Opt_key,
239         Opt_ip,
240         Opt_last_string,
241         /* string args above */
242         Opt_share,
243         Opt_noshare,
244         Opt_crc,
245         Opt_nocrc,
246         Opt_cephx_require_signatures,
247         Opt_nocephx_require_signatures,
248         Opt_tcp_nodelay,
249         Opt_notcp_nodelay,
250 };
251 
252 static match_table_t opt_tokens = {
253         {Opt_osdtimeout, "osdtimeout=%d"},
254         {Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
255         {Opt_mount_timeout, "mount_timeout=%d"},
256         {Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
257         /* int args above */
258         {Opt_fsid, "fsid=%s"},
259         {Opt_name, "name=%s"},
260         {Opt_secret, "secret=%s"},
261         {Opt_key, "key=%s"},
262         {Opt_ip, "ip=%s"},
263         /* string args above */
264         {Opt_share, "share"},
265         {Opt_noshare, "noshare"},
266         {Opt_crc, "crc"},
267         {Opt_nocrc, "nocrc"},
268         {Opt_cephx_require_signatures, "cephx_require_signatures"},
269         {Opt_nocephx_require_signatures, "nocephx_require_signatures"},
270         {Opt_tcp_nodelay, "tcp_nodelay"},
271         {Opt_notcp_nodelay, "notcp_nodelay"},
272         {-1, NULL}
273 };
274 
275 void ceph_destroy_options(struct ceph_options *opt)
276 {
277         dout("destroy_options %p\n", opt);
278         kfree(opt->name);
279         if (opt->key) {
280                 ceph_crypto_key_destroy(opt->key);
281                 kfree(opt->key);
282         }
283         kfree(opt->mon_addr);
284         kfree(opt);
285 }
286 EXPORT_SYMBOL(ceph_destroy_options);
287 
288 /* get secret from key store */
289 static int get_secret(struct ceph_crypto_key *dst, const char *name) {
290         struct key *ukey;
291         int key_err;
292         int err = 0;
293         struct ceph_crypto_key *ckey;
294 
295         ukey = request_key(&key_type_ceph, name, NULL);
296         if (!ukey || IS_ERR(ukey)) {
297                 /* request_key errors don't map nicely to mount(2)
298                    errors; don't even try, but still printk */
299                 key_err = PTR_ERR(ukey);
300                 switch (key_err) {
301                 case -ENOKEY:
302                         pr_warn("ceph: Mount failed due to key not found: %s\n",
303                                 name);
304                         break;
305                 case -EKEYEXPIRED:
306                         pr_warn("ceph: Mount failed due to expired key: %s\n",
307                                 name);
308                         break;
309                 case -EKEYREVOKED:
310                         pr_warn("ceph: Mount failed due to revoked key: %s\n",
311                                 name);
312                         break;
313                 default:
314                         pr_warn("ceph: Mount failed due to unknown key error %d: %s\n",
315                                 key_err, name);
316                 }
317                 err = -EPERM;
318                 goto out;
319         }
320 
321         ckey = ukey->payload.data;
322         err = ceph_crypto_key_clone(dst, ckey);
323         if (err)
324                 goto out_key;
325         /* pass through, err is 0 */
326 
327 out_key:
328         key_put(ukey);
329 out:
330         return err;
331 }
332 
333 struct ceph_options *
334 ceph_parse_options(char *options, const char *dev_name,
335                         const char *dev_name_end,
336                         int (*parse_extra_token)(char *c, void *private),
337                         void *private)
338 {
339         struct ceph_options *opt;
340         const char *c;
341         int err = -ENOMEM;
342         substring_t argstr[MAX_OPT_ARGS];
343 
344         opt = kzalloc(sizeof(*opt), GFP_KERNEL);
345         if (!opt)
346                 return ERR_PTR(-ENOMEM);
347         opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
348                                 GFP_KERNEL);
349         if (!opt->mon_addr)
350                 goto out;
351 
352         dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
353              dev_name);
354 
355         /* start with defaults */
356         opt->flags = CEPH_OPT_DEFAULT;
357         opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
358         opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT;
359         opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT;
360 
361         /* get mon ip(s) */
362         /* ip1[:port1][,ip2[:port2]...] */
363         err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
364                              CEPH_MAX_MON, &opt->num_mon);
365         if (err < 0)
366                 goto out;
367 
368         /* parse mount options */
369         while ((c = strsep(&options, ",")) != NULL) {
370                 int token, intval, ret;
371                 if (!*c)
372                         continue;
373                 err = -EINVAL;
374                 token = match_token((char *)c, opt_tokens, argstr);
375                 if (token < 0 && parse_extra_token) {
376                         /* extra? */
377                         err = parse_extra_token((char *)c, private);
378                         if (err < 0) {
379                                 pr_err("bad option at '%s'\n", c);
380                                 goto out;
381                         }
382                         continue;
383                 }
384                 if (token < Opt_last_int) {
385                         ret = match_int(&argstr[0], &intval);
386                         if (ret < 0) {
387                                 pr_err("bad mount option arg (not int) "
388                                        "at '%s'\n", c);
389                                 continue;
390                         }
391                         dout("got int token %d val %d\n", token, intval);
392                 } else if (token > Opt_last_int && token < Opt_last_string) {
393                         dout("got string token %d val %s\n", token,
394                              argstr[0].from);
395                 } else {
396                         dout("got token %d\n", token);
397                 }
398                 switch (token) {
399                 case Opt_ip:
400                         err = ceph_parse_ips(argstr[0].from,
401                                              argstr[0].to,
402                                              &opt->my_addr,
403                                              1, NULL);
404                         if (err < 0)
405                                 goto out;
406                         opt->flags |= CEPH_OPT_MYIP;
407                         break;
408 
409                 case Opt_fsid:
410                         err = parse_fsid(argstr[0].from, &opt->fsid);
411                         if (err == 0)
412                                 opt->flags |= CEPH_OPT_FSID;
413                         break;
414                 case Opt_name:
415                         opt->name = kstrndup(argstr[0].from,
416                                               argstr[0].to-argstr[0].from,
417                                               GFP_KERNEL);
418                         break;
419                 case Opt_secret:
420                         opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
421                         if (!opt->key) {
422                                 err = -ENOMEM;
423                                 goto out;
424                         }
425                         err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
426                         if (err < 0)
427                                 goto out;
428                         break;
429                 case Opt_key:
430                         opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
431                         if (!opt->key) {
432                                 err = -ENOMEM;
433                                 goto out;
434                         }
435                         err = get_secret(opt->key, argstr[0].from);
436                         if (err < 0)
437                                 goto out;
438                         break;
439 
440                         /* misc */
441                 case Opt_osdtimeout:
442                         pr_warn("ignoring deprecated osdtimeout option\n");
443                         break;
444                 case Opt_osdkeepalivetimeout:
445                         /* 0 isn't well defined right now, reject it */
446                         if (intval < 1 || intval > INT_MAX / 1000) {
447                                 pr_err("osdkeepalive out of range\n");
448                                 err = -EINVAL;
449                                 goto out;
450                         }
451                         opt->osd_keepalive_timeout =
452                                         msecs_to_jiffies(intval * 1000);
453                         break;
454                 case Opt_osd_idle_ttl:
455                         /* 0 isn't well defined right now, reject it */
456                         if (intval < 1 || intval > INT_MAX / 1000) {
457                                 pr_err("osd_idle_ttl out of range\n");
458                                 err = -EINVAL;
459                                 goto out;
460                         }
461                         opt->osd_idle_ttl = msecs_to_jiffies(intval * 1000);
462                         break;
463                 case Opt_mount_timeout:
464                         /* 0 is "wait forever" (i.e. infinite timeout) */
465                         if (intval < 0 || intval > INT_MAX / 1000) {
466                                 pr_err("mount_timeout out of range\n");
467                                 err = -EINVAL;
468                                 goto out;
469                         }
470                         opt->mount_timeout = msecs_to_jiffies(intval * 1000);
471                         break;
472 
473                 case Opt_share:
474                         opt->flags &= ~CEPH_OPT_NOSHARE;
475                         break;
476                 case Opt_noshare:
477                         opt->flags |= CEPH_OPT_NOSHARE;
478                         break;
479 
480                 case Opt_crc:
481                         opt->flags &= ~CEPH_OPT_NOCRC;
482                         break;
483                 case Opt_nocrc:
484                         opt->flags |= CEPH_OPT_NOCRC;
485                         break;
486 
487                 case Opt_cephx_require_signatures:
488                         opt->flags &= ~CEPH_OPT_NOMSGAUTH;
489                         break;
490                 case Opt_nocephx_require_signatures:
491                         opt->flags |= CEPH_OPT_NOMSGAUTH;
492                         break;
493 
494                 case Opt_tcp_nodelay:
495                         opt->flags |= CEPH_OPT_TCP_NODELAY;
496                         break;
497                 case Opt_notcp_nodelay:
498                         opt->flags &= ~CEPH_OPT_TCP_NODELAY;
499                         break;
500 
501                 default:
502                         BUG_ON(token);
503                 }
504         }
505 
506         /* success */
507         return opt;
508 
509 out:
510         ceph_destroy_options(opt);
511         return ERR_PTR(err);
512 }
513 EXPORT_SYMBOL(ceph_parse_options);
514 
515 int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
516 {
517         struct ceph_options *opt = client->options;
518         size_t pos = m->count;
519 
520         if (opt->name) {
521                 seq_puts(m, "name=");
522                 seq_escape(m, opt->name, ", \t\n\\");
523                 seq_putc(m, ',');
524         }
525         if (opt->key)
526                 seq_puts(m, "secret=<hidden>,");
527 
528         if (opt->flags & CEPH_OPT_FSID)
529                 seq_printf(m, "fsid=%pU,", &opt->fsid);
530         if (opt->flags & CEPH_OPT_NOSHARE)
531                 seq_puts(m, "noshare,");
532         if (opt->flags & CEPH_OPT_NOCRC)
533                 seq_puts(m, "nocrc,");
534         if (opt->flags & CEPH_OPT_NOMSGAUTH)
535                 seq_puts(m, "nocephx_require_signatures,");
536         if ((opt->flags & CEPH_OPT_TCP_NODELAY) == 0)
537                 seq_puts(m, "notcp_nodelay,");
538 
539         if (opt->mount_timeout != CEPH_MOUNT_TIMEOUT_DEFAULT)
540                 seq_printf(m, "mount_timeout=%d,",
541                            jiffies_to_msecs(opt->mount_timeout) / 1000);
542         if (opt->osd_idle_ttl != CEPH_OSD_IDLE_TTL_DEFAULT)
543                 seq_printf(m, "osd_idle_ttl=%d,",
544                            jiffies_to_msecs(opt->osd_idle_ttl) / 1000);
545         if (opt->osd_keepalive_timeout != CEPH_OSD_KEEPALIVE_DEFAULT)
546                 seq_printf(m, "osdkeepalivetimeout=%d,",
547                     jiffies_to_msecs(opt->osd_keepalive_timeout) / 1000);
548 
549         /* drop redundant comma */
550         if (m->count != pos)
551                 m->count--;
552 
553         return 0;
554 }
555 EXPORT_SYMBOL(ceph_print_client_options);
556 
557 u64 ceph_client_id(struct ceph_client *client)
558 {
559         return client->monc.auth->global_id;
560 }
561 EXPORT_SYMBOL(ceph_client_id);
562 
563 /*
564  * create a fresh client instance
565  */
566 struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
567                                        u64 supported_features,
568                                        u64 required_features)
569 {
570         struct ceph_client *client;
571         struct ceph_entity_addr *myaddr = NULL;
572         int err = -ENOMEM;
573 
574         client = kzalloc(sizeof(*client), GFP_KERNEL);
575         if (client == NULL)
576                 return ERR_PTR(-ENOMEM);
577 
578         client->private = private;
579         client->options = opt;
580 
581         mutex_init(&client->mount_mutex);
582         init_waitqueue_head(&client->auth_wq);
583         client->auth_err = 0;
584 
585         if (!ceph_test_opt(client, NOMSGAUTH))
586                 required_features |= CEPH_FEATURE_MSG_AUTH;
587 
588         client->extra_mon_dispatch = NULL;
589         client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
590                 supported_features;
591         client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
592                 required_features;
593 
594         /* msgr */
595         if (ceph_test_opt(client, MYIP))
596                 myaddr = &client->options->my_addr;
597 
598         ceph_messenger_init(&client->msgr, myaddr,
599                 client->supported_features,
600                 client->required_features,
601                 ceph_test_opt(client, NOCRC),
602                 ceph_test_opt(client, TCP_NODELAY));
603 
604         /* subsystems */
605         err = ceph_monc_init(&client->monc, client);
606         if (err < 0)
607                 goto fail;
608         err = ceph_osdc_init(&client->osdc, client);
609         if (err < 0)
610                 goto fail_monc;
611 
612         return client;
613 
614 fail_monc:
615         ceph_monc_stop(&client->monc);
616 fail:
617         ceph_messenger_fini(&client->msgr);
618         kfree(client);
619         return ERR_PTR(err);
620 }
621 EXPORT_SYMBOL(ceph_create_client);
622 
623 void ceph_destroy_client(struct ceph_client *client)
624 {
625         dout("destroy_client %p\n", client);
626 
627         atomic_set(&client->msgr.stopping, 1);
628 
629         /* unmount */
630         ceph_osdc_stop(&client->osdc);
631         ceph_monc_stop(&client->monc);
632         ceph_messenger_fini(&client->msgr);
633 
634         ceph_debugfs_client_cleanup(client);
635 
636         ceph_destroy_options(client->options);
637 
638         kfree(client);
639         dout("destroy_client %p done\n", client);
640 }
641 EXPORT_SYMBOL(ceph_destroy_client);
642 
643 /*
644  * true if we have the mon map (and have thus joined the cluster)
645  */
646 static int have_mon_and_osd_map(struct ceph_client *client)
647 {
648         return client->monc.monmap && client->monc.monmap->epoch &&
649                client->osdc.osdmap && client->osdc.osdmap->epoch;
650 }
651 
652 /*
653  * mount: join the ceph cluster, and open root directory.
654  */
655 int __ceph_open_session(struct ceph_client *client, unsigned long started)
656 {
657         unsigned long timeout = client->options->mount_timeout;
658         long err;
659 
660         /* open session, and wait for mon and osd maps */
661         err = ceph_monc_open_session(&client->monc);
662         if (err < 0)
663                 return err;
664 
665         while (!have_mon_and_osd_map(client)) {
666                 if (timeout && time_after_eq(jiffies, started + timeout))
667                         return -ETIMEDOUT;
668 
669                 /* wait */
670                 dout("mount waiting for mon_map\n");
671                 err = wait_event_interruptible_timeout(client->auth_wq,
672                         have_mon_and_osd_map(client) || (client->auth_err < 0),
673                         ceph_timeout_jiffies(timeout));
674                 if (err < 0)
675                         return err;
676                 if (client->auth_err < 0)
677                         return client->auth_err;
678         }
679 
680         return 0;
681 }
682 EXPORT_SYMBOL(__ceph_open_session);
683 
684 
685 int ceph_open_session(struct ceph_client *client)
686 {
687         int ret;
688         unsigned long started = jiffies;  /* note the start time */
689 
690         dout("open_session start\n");
691         mutex_lock(&client->mount_mutex);
692 
693         ret = __ceph_open_session(client, started);
694 
695         mutex_unlock(&client->mount_mutex);
696         return ret;
697 }
698 EXPORT_SYMBOL(ceph_open_session);
699 
700 
701 static int __init init_ceph_lib(void)
702 {
703         int ret = 0;
704 
705         ret = ceph_debugfs_init();
706         if (ret < 0)
707                 goto out;
708 
709         ret = ceph_crypto_init();
710         if (ret < 0)
711                 goto out_debugfs;
712 
713         ret = ceph_msgr_init();
714         if (ret < 0)
715                 goto out_crypto;
716 
717         ret = ceph_osdc_setup();
718         if (ret < 0)
719                 goto out_msgr;
720 
721         pr_info("loaded (mon/osd proto %d/%d)\n",
722                 CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
723 
724         return 0;
725 
726 out_msgr:
727         ceph_msgr_exit();
728 out_crypto:
729         ceph_crypto_shutdown();
730 out_debugfs:
731         ceph_debugfs_cleanup();
732 out:
733         return ret;
734 }
735 
736 static void __exit exit_ceph_lib(void)
737 {
738         dout("exit_ceph_lib\n");
739         ceph_osdc_cleanup();
740         ceph_msgr_exit();
741         ceph_crypto_shutdown();
742         ceph_debugfs_cleanup();
743 }
744 
745 module_init(init_ceph_lib);
746 module_exit(exit_ceph_lib);
747 
748 MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
749 MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
750 MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
751 MODULE_DESCRIPTION("Ceph core library");
752 MODULE_LICENSE("GPL");
753 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp