This source file includes following definitions.
- config_item_to_cluster
- cluster_cluster_name_show
- cluster_cluster_name_store
- cluster_set
- config_item_to_space
- config_item_to_comm
- config_item_to_node
- make_cluster
- drop_cluster
- release_cluster
- make_space
- drop_space
- release_space
- make_comm
- drop_comm
- release_comm
- make_node
- drop_node
- release_node
- dlm_config_init
- dlm_config_exit
- comm_nodeid_show
- comm_nodeid_store
- comm_local_show
- comm_local_store
- comm_addr_store
- comm_addr_list_show
- node_nodeid_show
- node_nodeid_store
- node_weight_show
- node_weight_store
- get_space
- put_space
- get_comm
- put_comm
- dlm_config_nodes
- dlm_comm_seq
- dlm_our_nodeid
- dlm_our_addr
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12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/configfs.h>
15 #include <linux/slab.h>
16 #include <linux/in.h>
17 #include <linux/in6.h>
18 #include <linux/dlmconstants.h>
19 #include <net/ipv6.h>
20 #include <net/sock.h>
21
22 #include "config.h"
23 #include "lowcomms.h"
24
25
26
27
28
29
30
31
32
33
34
35 static struct config_group *space_list;
36 static struct config_group *comm_list;
37 static struct dlm_comm *local_comm;
38 static uint32_t dlm_comm_count;
39
40 struct dlm_clusters;
41 struct dlm_cluster;
42 struct dlm_spaces;
43 struct dlm_space;
44 struct dlm_comms;
45 struct dlm_comm;
46 struct dlm_nodes;
47 struct dlm_node;
48
49 static struct config_group *make_cluster(struct config_group *, const char *);
50 static void drop_cluster(struct config_group *, struct config_item *);
51 static void release_cluster(struct config_item *);
52 static struct config_group *make_space(struct config_group *, const char *);
53 static void drop_space(struct config_group *, struct config_item *);
54 static void release_space(struct config_item *);
55 static struct config_item *make_comm(struct config_group *, const char *);
56 static void drop_comm(struct config_group *, struct config_item *);
57 static void release_comm(struct config_item *);
58 static struct config_item *make_node(struct config_group *, const char *);
59 static void drop_node(struct config_group *, struct config_item *);
60 static void release_node(struct config_item *);
61
62 static struct configfs_attribute *comm_attrs[];
63 static struct configfs_attribute *node_attrs[];
64
65 struct dlm_cluster {
66 struct config_group group;
67 unsigned int cl_tcp_port;
68 unsigned int cl_buffer_size;
69 unsigned int cl_rsbtbl_size;
70 unsigned int cl_recover_timer;
71 unsigned int cl_toss_secs;
72 unsigned int cl_scan_secs;
73 unsigned int cl_log_debug;
74 unsigned int cl_log_info;
75 unsigned int cl_protocol;
76 unsigned int cl_timewarn_cs;
77 unsigned int cl_waitwarn_us;
78 unsigned int cl_new_rsb_count;
79 unsigned int cl_recover_callbacks;
80 char cl_cluster_name[DLM_LOCKSPACE_LEN];
81 };
82
83 static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
84 {
85 return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
86 NULL;
87 }
88
89 enum {
90 CLUSTER_ATTR_TCP_PORT = 0,
91 CLUSTER_ATTR_BUFFER_SIZE,
92 CLUSTER_ATTR_RSBTBL_SIZE,
93 CLUSTER_ATTR_RECOVER_TIMER,
94 CLUSTER_ATTR_TOSS_SECS,
95 CLUSTER_ATTR_SCAN_SECS,
96 CLUSTER_ATTR_LOG_DEBUG,
97 CLUSTER_ATTR_LOG_INFO,
98 CLUSTER_ATTR_PROTOCOL,
99 CLUSTER_ATTR_TIMEWARN_CS,
100 CLUSTER_ATTR_WAITWARN_US,
101 CLUSTER_ATTR_NEW_RSB_COUNT,
102 CLUSTER_ATTR_RECOVER_CALLBACKS,
103 CLUSTER_ATTR_CLUSTER_NAME,
104 };
105
106 static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
107 {
108 struct dlm_cluster *cl = config_item_to_cluster(item);
109 return sprintf(buf, "%s\n", cl->cl_cluster_name);
110 }
111
112 static ssize_t cluster_cluster_name_store(struct config_item *item,
113 const char *buf, size_t len)
114 {
115 struct dlm_cluster *cl = config_item_to_cluster(item);
116
117 strlcpy(dlm_config.ci_cluster_name, buf,
118 sizeof(dlm_config.ci_cluster_name));
119 strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
120 return len;
121 }
122
123 CONFIGFS_ATTR(cluster_, cluster_name);
124
125 static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
126 int *info_field, int check_zero,
127 const char *buf, size_t len)
128 {
129 unsigned int x;
130 int rc;
131
132 if (!capable(CAP_SYS_ADMIN))
133 return -EPERM;
134 rc = kstrtouint(buf, 0, &x);
135 if (rc)
136 return rc;
137
138 if (check_zero && !x)
139 return -EINVAL;
140
141 *cl_field = x;
142 *info_field = x;
143
144 return len;
145 }
146
147 #define CLUSTER_ATTR(name, check_zero) \
148 static ssize_t cluster_##name##_store(struct config_item *item, \
149 const char *buf, size_t len) \
150 { \
151 struct dlm_cluster *cl = config_item_to_cluster(item); \
152 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
153 check_zero, buf, len); \
154 } \
155 static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
156 { \
157 struct dlm_cluster *cl = config_item_to_cluster(item); \
158 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
159 } \
160 CONFIGFS_ATTR(cluster_, name);
161
162 CLUSTER_ATTR(tcp_port, 1);
163 CLUSTER_ATTR(buffer_size, 1);
164 CLUSTER_ATTR(rsbtbl_size, 1);
165 CLUSTER_ATTR(recover_timer, 1);
166 CLUSTER_ATTR(toss_secs, 1);
167 CLUSTER_ATTR(scan_secs, 1);
168 CLUSTER_ATTR(log_debug, 0);
169 CLUSTER_ATTR(log_info, 0);
170 CLUSTER_ATTR(protocol, 0);
171 CLUSTER_ATTR(timewarn_cs, 1);
172 CLUSTER_ATTR(waitwarn_us, 0);
173 CLUSTER_ATTR(new_rsb_count, 0);
174 CLUSTER_ATTR(recover_callbacks, 0);
175
176 static struct configfs_attribute *cluster_attrs[] = {
177 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
178 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
179 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
180 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
181 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
182 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
183 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
184 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info,
185 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
186 [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs,
187 [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us,
188 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
189 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
190 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
191 NULL,
192 };
193
194 enum {
195 COMM_ATTR_NODEID = 0,
196 COMM_ATTR_LOCAL,
197 COMM_ATTR_ADDR,
198 COMM_ATTR_ADDR_LIST,
199 };
200
201 enum {
202 NODE_ATTR_NODEID = 0,
203 NODE_ATTR_WEIGHT,
204 };
205
206 struct dlm_clusters {
207 struct configfs_subsystem subsys;
208 };
209
210 struct dlm_spaces {
211 struct config_group ss_group;
212 };
213
214 struct dlm_space {
215 struct config_group group;
216 struct list_head members;
217 struct mutex members_lock;
218 int members_count;
219 };
220
221 struct dlm_comms {
222 struct config_group cs_group;
223 };
224
225 struct dlm_comm {
226 struct config_item item;
227 int seq;
228 int nodeid;
229 int local;
230 int addr_count;
231 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
232 };
233
234 struct dlm_nodes {
235 struct config_group ns_group;
236 };
237
238 struct dlm_node {
239 struct config_item item;
240 struct list_head list;
241 int nodeid;
242 int weight;
243 int new;
244 int comm_seq;
245 };
246
247 static struct configfs_group_operations clusters_ops = {
248 .make_group = make_cluster,
249 .drop_item = drop_cluster,
250 };
251
252 static struct configfs_item_operations cluster_ops = {
253 .release = release_cluster,
254 };
255
256 static struct configfs_group_operations spaces_ops = {
257 .make_group = make_space,
258 .drop_item = drop_space,
259 };
260
261 static struct configfs_item_operations space_ops = {
262 .release = release_space,
263 };
264
265 static struct configfs_group_operations comms_ops = {
266 .make_item = make_comm,
267 .drop_item = drop_comm,
268 };
269
270 static struct configfs_item_operations comm_ops = {
271 .release = release_comm,
272 };
273
274 static struct configfs_group_operations nodes_ops = {
275 .make_item = make_node,
276 .drop_item = drop_node,
277 };
278
279 static struct configfs_item_operations node_ops = {
280 .release = release_node,
281 };
282
283 static const struct config_item_type clusters_type = {
284 .ct_group_ops = &clusters_ops,
285 .ct_owner = THIS_MODULE,
286 };
287
288 static const struct config_item_type cluster_type = {
289 .ct_item_ops = &cluster_ops,
290 .ct_attrs = cluster_attrs,
291 .ct_owner = THIS_MODULE,
292 };
293
294 static const struct config_item_type spaces_type = {
295 .ct_group_ops = &spaces_ops,
296 .ct_owner = THIS_MODULE,
297 };
298
299 static const struct config_item_type space_type = {
300 .ct_item_ops = &space_ops,
301 .ct_owner = THIS_MODULE,
302 };
303
304 static const struct config_item_type comms_type = {
305 .ct_group_ops = &comms_ops,
306 .ct_owner = THIS_MODULE,
307 };
308
309 static const struct config_item_type comm_type = {
310 .ct_item_ops = &comm_ops,
311 .ct_attrs = comm_attrs,
312 .ct_owner = THIS_MODULE,
313 };
314
315 static const struct config_item_type nodes_type = {
316 .ct_group_ops = &nodes_ops,
317 .ct_owner = THIS_MODULE,
318 };
319
320 static const struct config_item_type node_type = {
321 .ct_item_ops = &node_ops,
322 .ct_attrs = node_attrs,
323 .ct_owner = THIS_MODULE,
324 };
325
326 static struct dlm_space *config_item_to_space(struct config_item *i)
327 {
328 return i ? container_of(to_config_group(i), struct dlm_space, group) :
329 NULL;
330 }
331
332 static struct dlm_comm *config_item_to_comm(struct config_item *i)
333 {
334 return i ? container_of(i, struct dlm_comm, item) : NULL;
335 }
336
337 static struct dlm_node *config_item_to_node(struct config_item *i)
338 {
339 return i ? container_of(i, struct dlm_node, item) : NULL;
340 }
341
342 static struct config_group *make_cluster(struct config_group *g,
343 const char *name)
344 {
345 struct dlm_cluster *cl = NULL;
346 struct dlm_spaces *sps = NULL;
347 struct dlm_comms *cms = NULL;
348
349 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
350 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
351 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
352
353 if (!cl || !sps || !cms)
354 goto fail;
355
356 config_group_init_type_name(&cl->group, name, &cluster_type);
357 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
358 config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
359
360 configfs_add_default_group(&sps->ss_group, &cl->group);
361 configfs_add_default_group(&cms->cs_group, &cl->group);
362
363 cl->cl_tcp_port = dlm_config.ci_tcp_port;
364 cl->cl_buffer_size = dlm_config.ci_buffer_size;
365 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
366 cl->cl_recover_timer = dlm_config.ci_recover_timer;
367 cl->cl_toss_secs = dlm_config.ci_toss_secs;
368 cl->cl_scan_secs = dlm_config.ci_scan_secs;
369 cl->cl_log_debug = dlm_config.ci_log_debug;
370 cl->cl_log_info = dlm_config.ci_log_info;
371 cl->cl_protocol = dlm_config.ci_protocol;
372 cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
373 cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
374 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
375 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
376 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
377 DLM_LOCKSPACE_LEN);
378
379 space_list = &sps->ss_group;
380 comm_list = &cms->cs_group;
381 return &cl->group;
382
383 fail:
384 kfree(cl);
385 kfree(sps);
386 kfree(cms);
387 return ERR_PTR(-ENOMEM);
388 }
389
390 static void drop_cluster(struct config_group *g, struct config_item *i)
391 {
392 struct dlm_cluster *cl = config_item_to_cluster(i);
393
394 configfs_remove_default_groups(&cl->group);
395
396 space_list = NULL;
397 comm_list = NULL;
398
399 config_item_put(i);
400 }
401
402 static void release_cluster(struct config_item *i)
403 {
404 struct dlm_cluster *cl = config_item_to_cluster(i);
405 kfree(cl);
406 }
407
408 static struct config_group *make_space(struct config_group *g, const char *name)
409 {
410 struct dlm_space *sp = NULL;
411 struct dlm_nodes *nds = NULL;
412
413 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
414 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
415
416 if (!sp || !nds)
417 goto fail;
418
419 config_group_init_type_name(&sp->group, name, &space_type);
420
421 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
422 configfs_add_default_group(&nds->ns_group, &sp->group);
423
424 INIT_LIST_HEAD(&sp->members);
425 mutex_init(&sp->members_lock);
426 sp->members_count = 0;
427 return &sp->group;
428
429 fail:
430 kfree(sp);
431 kfree(nds);
432 return ERR_PTR(-ENOMEM);
433 }
434
435 static void drop_space(struct config_group *g, struct config_item *i)
436 {
437 struct dlm_space *sp = config_item_to_space(i);
438
439
440
441 configfs_remove_default_groups(&sp->group);
442 config_item_put(i);
443 }
444
445 static void release_space(struct config_item *i)
446 {
447 struct dlm_space *sp = config_item_to_space(i);
448 kfree(sp);
449 }
450
451 static struct config_item *make_comm(struct config_group *g, const char *name)
452 {
453 struct dlm_comm *cm;
454
455 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
456 if (!cm)
457 return ERR_PTR(-ENOMEM);
458
459 config_item_init_type_name(&cm->item, name, &comm_type);
460
461 cm->seq = dlm_comm_count++;
462 if (!cm->seq)
463 cm->seq = dlm_comm_count++;
464
465 cm->nodeid = -1;
466 cm->local = 0;
467 cm->addr_count = 0;
468 return &cm->item;
469 }
470
471 static void drop_comm(struct config_group *g, struct config_item *i)
472 {
473 struct dlm_comm *cm = config_item_to_comm(i);
474 if (local_comm == cm)
475 local_comm = NULL;
476 dlm_lowcomms_close(cm->nodeid);
477 while (cm->addr_count--)
478 kfree(cm->addr[cm->addr_count]);
479 config_item_put(i);
480 }
481
482 static void release_comm(struct config_item *i)
483 {
484 struct dlm_comm *cm = config_item_to_comm(i);
485 kfree(cm);
486 }
487
488 static struct config_item *make_node(struct config_group *g, const char *name)
489 {
490 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
491 struct dlm_node *nd;
492
493 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
494 if (!nd)
495 return ERR_PTR(-ENOMEM);
496
497 config_item_init_type_name(&nd->item, name, &node_type);
498 nd->nodeid = -1;
499 nd->weight = 1;
500 nd->new = 1;
501
502 mutex_lock(&sp->members_lock);
503 list_add(&nd->list, &sp->members);
504 sp->members_count++;
505 mutex_unlock(&sp->members_lock);
506
507 return &nd->item;
508 }
509
510 static void drop_node(struct config_group *g, struct config_item *i)
511 {
512 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
513 struct dlm_node *nd = config_item_to_node(i);
514
515 mutex_lock(&sp->members_lock);
516 list_del(&nd->list);
517 sp->members_count--;
518 mutex_unlock(&sp->members_lock);
519
520 config_item_put(i);
521 }
522
523 static void release_node(struct config_item *i)
524 {
525 struct dlm_node *nd = config_item_to_node(i);
526 kfree(nd);
527 }
528
529 static struct dlm_clusters clusters_root = {
530 .subsys = {
531 .su_group = {
532 .cg_item = {
533 .ci_namebuf = "dlm",
534 .ci_type = &clusters_type,
535 },
536 },
537 },
538 };
539
540 int __init dlm_config_init(void)
541 {
542 config_group_init(&clusters_root.subsys.su_group);
543 mutex_init(&clusters_root.subsys.su_mutex);
544 return configfs_register_subsystem(&clusters_root.subsys);
545 }
546
547 void dlm_config_exit(void)
548 {
549 configfs_unregister_subsystem(&clusters_root.subsys);
550 }
551
552
553
554
555
556 static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
557 {
558 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid);
559 }
560
561 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
562 size_t len)
563 {
564 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid);
565
566 if (rc)
567 return rc;
568 return len;
569 }
570
571 static ssize_t comm_local_show(struct config_item *item, char *buf)
572 {
573 return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
574 }
575
576 static ssize_t comm_local_store(struct config_item *item, const char *buf,
577 size_t len)
578 {
579 struct dlm_comm *cm = config_item_to_comm(item);
580 int rc = kstrtoint(buf, 0, &cm->local);
581
582 if (rc)
583 return rc;
584 if (cm->local && !local_comm)
585 local_comm = cm;
586 return len;
587 }
588
589 static ssize_t comm_addr_store(struct config_item *item, const char *buf,
590 size_t len)
591 {
592 struct dlm_comm *cm = config_item_to_comm(item);
593 struct sockaddr_storage *addr;
594 int rv;
595
596 if (len != sizeof(struct sockaddr_storage))
597 return -EINVAL;
598
599 if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
600 return -ENOSPC;
601
602 addr = kzalloc(sizeof(*addr), GFP_NOFS);
603 if (!addr)
604 return -ENOMEM;
605
606 memcpy(addr, buf, len);
607
608 rv = dlm_lowcomms_addr(cm->nodeid, addr, len);
609 if (rv) {
610 kfree(addr);
611 return rv;
612 }
613
614 cm->addr[cm->addr_count++] = addr;
615 return len;
616 }
617
618 static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
619 {
620 struct dlm_comm *cm = config_item_to_comm(item);
621 ssize_t s;
622 ssize_t allowance;
623 int i;
624 struct sockaddr_storage *addr;
625 struct sockaddr_in *addr_in;
626 struct sockaddr_in6 *addr_in6;
627
628
629 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
630
631
632
633 allowance = 4096;
634 buf[0] = '\0';
635
636 for (i = 0; i < cm->addr_count; i++) {
637 addr = cm->addr[i];
638
639 switch(addr->ss_family) {
640 case AF_INET:
641 addr_in = (struct sockaddr_in *)addr;
642 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
643 break;
644 case AF_INET6:
645 addr_in6 = (struct sockaddr_in6 *)addr;
646 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
647 break;
648 default:
649 s = sprintf(buf0, "%s\n", "<UNKNOWN>");
650 break;
651 }
652 allowance -= s;
653 if (allowance >= 0)
654 strcat(buf, buf0);
655 else {
656 allowance += s;
657 break;
658 }
659 }
660 return 4096 - allowance;
661 }
662
663 CONFIGFS_ATTR(comm_, nodeid);
664 CONFIGFS_ATTR(comm_, local);
665 CONFIGFS_ATTR_WO(comm_, addr);
666 CONFIGFS_ATTR_RO(comm_, addr_list);
667
668 static struct configfs_attribute *comm_attrs[] = {
669 [COMM_ATTR_NODEID] = &comm_attr_nodeid,
670 [COMM_ATTR_LOCAL] = &comm_attr_local,
671 [COMM_ATTR_ADDR] = &comm_attr_addr,
672 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
673 NULL,
674 };
675
676 static ssize_t node_nodeid_show(struct config_item *item, char *buf)
677 {
678 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid);
679 }
680
681 static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
682 size_t len)
683 {
684 struct dlm_node *nd = config_item_to_node(item);
685 uint32_t seq = 0;
686 int rc = kstrtoint(buf, 0, &nd->nodeid);
687
688 if (rc)
689 return rc;
690 dlm_comm_seq(nd->nodeid, &seq);
691 nd->comm_seq = seq;
692 return len;
693 }
694
695 static ssize_t node_weight_show(struct config_item *item, char *buf)
696 {
697 return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
698 }
699
700 static ssize_t node_weight_store(struct config_item *item, const char *buf,
701 size_t len)
702 {
703 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
704
705 if (rc)
706 return rc;
707 return len;
708 }
709
710 CONFIGFS_ATTR(node_, nodeid);
711 CONFIGFS_ATTR(node_, weight);
712
713 static struct configfs_attribute *node_attrs[] = {
714 [NODE_ATTR_NODEID] = &node_attr_nodeid,
715 [NODE_ATTR_WEIGHT] = &node_attr_weight,
716 NULL,
717 };
718
719
720
721
722
723 static struct dlm_space *get_space(char *name)
724 {
725 struct config_item *i;
726
727 if (!space_list)
728 return NULL;
729
730 mutex_lock(&space_list->cg_subsys->su_mutex);
731 i = config_group_find_item(space_list, name);
732 mutex_unlock(&space_list->cg_subsys->su_mutex);
733
734 return config_item_to_space(i);
735 }
736
737 static void put_space(struct dlm_space *sp)
738 {
739 config_item_put(&sp->group.cg_item);
740 }
741
742 static struct dlm_comm *get_comm(int nodeid)
743 {
744 struct config_item *i;
745 struct dlm_comm *cm = NULL;
746 int found = 0;
747
748 if (!comm_list)
749 return NULL;
750
751 mutex_lock(&clusters_root.subsys.su_mutex);
752
753 list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
754 cm = config_item_to_comm(i);
755
756 if (cm->nodeid != nodeid)
757 continue;
758 found = 1;
759 config_item_get(i);
760 break;
761 }
762 mutex_unlock(&clusters_root.subsys.su_mutex);
763
764 if (!found)
765 cm = NULL;
766 return cm;
767 }
768
769 static void put_comm(struct dlm_comm *cm)
770 {
771 config_item_put(&cm->item);
772 }
773
774
775 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
776 int *count_out)
777 {
778 struct dlm_space *sp;
779 struct dlm_node *nd;
780 struct dlm_config_node *nodes, *node;
781 int rv, count;
782
783 sp = get_space(lsname);
784 if (!sp)
785 return -EEXIST;
786
787 mutex_lock(&sp->members_lock);
788 if (!sp->members_count) {
789 rv = -EINVAL;
790 printk(KERN_ERR "dlm: zero members_count\n");
791 goto out;
792 }
793
794 count = sp->members_count;
795
796 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
797 if (!nodes) {
798 rv = -ENOMEM;
799 goto out;
800 }
801
802 node = nodes;
803 list_for_each_entry(nd, &sp->members, list) {
804 node->nodeid = nd->nodeid;
805 node->weight = nd->weight;
806 node->new = nd->new;
807 node->comm_seq = nd->comm_seq;
808 node++;
809
810 nd->new = 0;
811 }
812
813 *count_out = count;
814 *nodes_out = nodes;
815 rv = 0;
816 out:
817 mutex_unlock(&sp->members_lock);
818 put_space(sp);
819 return rv;
820 }
821
822 int dlm_comm_seq(int nodeid, uint32_t *seq)
823 {
824 struct dlm_comm *cm = get_comm(nodeid);
825 if (!cm)
826 return -EEXIST;
827 *seq = cm->seq;
828 put_comm(cm);
829 return 0;
830 }
831
832 int dlm_our_nodeid(void)
833 {
834 return local_comm ? local_comm->nodeid : 0;
835 }
836
837
838 int dlm_our_addr(struct sockaddr_storage *addr, int num)
839 {
840 if (!local_comm)
841 return -1;
842 if (num + 1 > local_comm->addr_count)
843 return -1;
844 memcpy(addr, local_comm->addr[num], sizeof(*addr));
845 return 0;
846 }
847
848
849 #define DEFAULT_TCP_PORT 21064
850 #define DEFAULT_BUFFER_SIZE 4096
851 #define DEFAULT_RSBTBL_SIZE 1024
852 #define DEFAULT_RECOVER_TIMER 5
853 #define DEFAULT_TOSS_SECS 10
854 #define DEFAULT_SCAN_SECS 5
855 #define DEFAULT_LOG_DEBUG 0
856 #define DEFAULT_LOG_INFO 1
857 #define DEFAULT_PROTOCOL 0
858 #define DEFAULT_TIMEWARN_CS 500
859 #define DEFAULT_WAITWARN_US 0
860 #define DEFAULT_NEW_RSB_COUNT 128
861 #define DEFAULT_RECOVER_CALLBACKS 0
862 #define DEFAULT_CLUSTER_NAME ""
863
864 struct dlm_config_info dlm_config = {
865 .ci_tcp_port = DEFAULT_TCP_PORT,
866 .ci_buffer_size = DEFAULT_BUFFER_SIZE,
867 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
868 .ci_recover_timer = DEFAULT_RECOVER_TIMER,
869 .ci_toss_secs = DEFAULT_TOSS_SECS,
870 .ci_scan_secs = DEFAULT_SCAN_SECS,
871 .ci_log_debug = DEFAULT_LOG_DEBUG,
872 .ci_log_info = DEFAULT_LOG_INFO,
873 .ci_protocol = DEFAULT_PROTOCOL,
874 .ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
875 .ci_waitwarn_us = DEFAULT_WAITWARN_US,
876 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
877 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
878 .ci_cluster_name = DEFAULT_CLUSTER_NAME
879 };
880