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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 "midcomms.h"
24#include "lowcomms.h"
25
26
27
28
29
30
31
32
33
34
35
36static struct config_group *space_list;
37static struct config_group *comm_list;
38static struct dlm_comm *local_comm;
39static uint32_t dlm_comm_count;
40
41struct dlm_clusters;
42struct dlm_cluster;
43struct dlm_spaces;
44struct dlm_space;
45struct dlm_comms;
46struct dlm_comm;
47struct dlm_nodes;
48struct dlm_node;
49
50static struct config_group *make_cluster(struct config_group *, const char *);
51static void drop_cluster(struct config_group *, struct config_item *);
52static void release_cluster(struct config_item *);
53static struct config_group *make_space(struct config_group *, const char *);
54static void drop_space(struct config_group *, struct config_item *);
55static void release_space(struct config_item *);
56static struct config_item *make_comm(struct config_group *, const char *);
57static void drop_comm(struct config_group *, struct config_item *);
58static void release_comm(struct config_item *);
59static struct config_item *make_node(struct config_group *, const char *);
60static void drop_node(struct config_group *, struct config_item *);
61static void release_node(struct config_item *);
62
63static struct configfs_attribute *comm_attrs[];
64static struct configfs_attribute *node_attrs[];
65
66struct dlm_cluster {
67 struct config_group group;
68 unsigned int cl_tcp_port;
69 unsigned int cl_buffer_size;
70 unsigned int cl_rsbtbl_size;
71 unsigned int cl_recover_timer;
72 unsigned int cl_toss_secs;
73 unsigned int cl_scan_secs;
74 unsigned int cl_log_debug;
75 unsigned int cl_log_info;
76 unsigned int cl_protocol;
77 unsigned int cl_mark;
78 unsigned int cl_timewarn_cs;
79 unsigned int cl_waitwarn_us;
80 unsigned int cl_new_rsb_count;
81 unsigned int cl_recover_callbacks;
82 char cl_cluster_name[DLM_LOCKSPACE_LEN];
83
84 struct dlm_spaces *sps;
85 struct dlm_comms *cms;
86};
87
88static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
89{
90 return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
91 NULL;
92}
93
94enum {
95 CLUSTER_ATTR_TCP_PORT = 0,
96 CLUSTER_ATTR_BUFFER_SIZE,
97 CLUSTER_ATTR_RSBTBL_SIZE,
98 CLUSTER_ATTR_RECOVER_TIMER,
99 CLUSTER_ATTR_TOSS_SECS,
100 CLUSTER_ATTR_SCAN_SECS,
101 CLUSTER_ATTR_LOG_DEBUG,
102 CLUSTER_ATTR_LOG_INFO,
103 CLUSTER_ATTR_PROTOCOL,
104 CLUSTER_ATTR_MARK,
105 CLUSTER_ATTR_TIMEWARN_CS,
106 CLUSTER_ATTR_WAITWARN_US,
107 CLUSTER_ATTR_NEW_RSB_COUNT,
108 CLUSTER_ATTR_RECOVER_CALLBACKS,
109 CLUSTER_ATTR_CLUSTER_NAME,
110};
111
112static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
113{
114 struct dlm_cluster *cl = config_item_to_cluster(item);
115 return sprintf(buf, "%s\n", cl->cl_cluster_name);
116}
117
118static ssize_t cluster_cluster_name_store(struct config_item *item,
119 const char *buf, size_t len)
120{
121 struct dlm_cluster *cl = config_item_to_cluster(item);
122
123 strlcpy(dlm_config.ci_cluster_name, buf,
124 sizeof(dlm_config.ci_cluster_name));
125 strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
126 return len;
127}
128
129CONFIGFS_ATTR(cluster_, cluster_name);
130
131static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
132 int *info_field, int (*check_cb)(unsigned int x),
133 const char *buf, size_t len)
134{
135 unsigned int x;
136 int rc;
137
138 if (!capable(CAP_SYS_ADMIN))
139 return -EPERM;
140 rc = kstrtouint(buf, 0, &x);
141 if (rc)
142 return rc;
143
144 if (check_cb) {
145 rc = check_cb(x);
146 if (rc)
147 return rc;
148 }
149
150 *cl_field = x;
151 *info_field = x;
152
153 return len;
154}
155
156#define CLUSTER_ATTR(name, check_cb) \
157static ssize_t cluster_##name##_store(struct config_item *item, \
158 const char *buf, size_t len) \
159{ \
160 struct dlm_cluster *cl = config_item_to_cluster(item); \
161 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
162 check_cb, buf, len); \
163} \
164static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
165{ \
166 struct dlm_cluster *cl = config_item_to_cluster(item); \
167 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
168} \
169CONFIGFS_ATTR(cluster_, name);
170
171static int dlm_check_protocol_and_dlm_running(unsigned int x)
172{
173 switch (x) {
174 case 0:
175
176 break;
177 case 1:
178
179 break;
180 default:
181 return -EINVAL;
182 }
183
184 if (dlm_allow_conn)
185 return -EBUSY;
186
187 return 0;
188}
189
190static int dlm_check_zero_and_dlm_running(unsigned int x)
191{
192 if (!x)
193 return -EINVAL;
194
195 if (dlm_allow_conn)
196 return -EBUSY;
197
198 return 0;
199}
200
201static int dlm_check_zero(unsigned int x)
202{
203 if (!x)
204 return -EINVAL;
205
206 return 0;
207}
208
209static int dlm_check_buffer_size(unsigned int x)
210{
211 if (x < DLM_MAX_SOCKET_BUFSIZE)
212 return -EINVAL;
213
214 return 0;
215}
216
217CLUSTER_ATTR(tcp_port, dlm_check_zero_and_dlm_running);
218CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);
219CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);
220CLUSTER_ATTR(recover_timer, dlm_check_zero);
221CLUSTER_ATTR(toss_secs, dlm_check_zero);
222CLUSTER_ATTR(scan_secs, dlm_check_zero);
223CLUSTER_ATTR(log_debug, NULL);
224CLUSTER_ATTR(log_info, NULL);
225CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running);
226CLUSTER_ATTR(mark, NULL);
227CLUSTER_ATTR(timewarn_cs, dlm_check_zero);
228CLUSTER_ATTR(waitwarn_us, NULL);
229CLUSTER_ATTR(new_rsb_count, NULL);
230CLUSTER_ATTR(recover_callbacks, NULL);
231
232static struct configfs_attribute *cluster_attrs[] = {
233 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
234 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
235 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
236 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
237 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
238 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
239 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
240 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info,
241 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
242 [CLUSTER_ATTR_MARK] = &cluster_attr_mark,
243 [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs,
244 [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us,
245 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
246 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
247 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
248 NULL,
249};
250
251enum {
252 COMM_ATTR_NODEID = 0,
253 COMM_ATTR_LOCAL,
254 COMM_ATTR_ADDR,
255 COMM_ATTR_ADDR_LIST,
256 COMM_ATTR_MARK,
257};
258
259enum {
260 NODE_ATTR_NODEID = 0,
261 NODE_ATTR_WEIGHT,
262};
263
264struct dlm_clusters {
265 struct configfs_subsystem subsys;
266};
267
268struct dlm_spaces {
269 struct config_group ss_group;
270};
271
272struct dlm_space {
273 struct config_group group;
274 struct list_head members;
275 struct mutex members_lock;
276 int members_count;
277 struct dlm_nodes *nds;
278};
279
280struct dlm_comms {
281 struct config_group cs_group;
282};
283
284struct dlm_comm {
285 struct config_item item;
286 int seq;
287 int nodeid;
288 int local;
289 int addr_count;
290 unsigned int mark;
291 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
292};
293
294struct dlm_nodes {
295 struct config_group ns_group;
296};
297
298struct dlm_node {
299 struct config_item item;
300 struct list_head list;
301 int nodeid;
302 int weight;
303 int new;
304 int comm_seq;
305};
306
307static struct configfs_group_operations clusters_ops = {
308 .make_group = make_cluster,
309 .drop_item = drop_cluster,
310};
311
312static struct configfs_item_operations cluster_ops = {
313 .release = release_cluster,
314};
315
316static struct configfs_group_operations spaces_ops = {
317 .make_group = make_space,
318 .drop_item = drop_space,
319};
320
321static struct configfs_item_operations space_ops = {
322 .release = release_space,
323};
324
325static struct configfs_group_operations comms_ops = {
326 .make_item = make_comm,
327 .drop_item = drop_comm,
328};
329
330static struct configfs_item_operations comm_ops = {
331 .release = release_comm,
332};
333
334static struct configfs_group_operations nodes_ops = {
335 .make_item = make_node,
336 .drop_item = drop_node,
337};
338
339static struct configfs_item_operations node_ops = {
340 .release = release_node,
341};
342
343static const struct config_item_type clusters_type = {
344 .ct_group_ops = &clusters_ops,
345 .ct_owner = THIS_MODULE,
346};
347
348static const struct config_item_type cluster_type = {
349 .ct_item_ops = &cluster_ops,
350 .ct_attrs = cluster_attrs,
351 .ct_owner = THIS_MODULE,
352};
353
354static const struct config_item_type spaces_type = {
355 .ct_group_ops = &spaces_ops,
356 .ct_owner = THIS_MODULE,
357};
358
359static const struct config_item_type space_type = {
360 .ct_item_ops = &space_ops,
361 .ct_owner = THIS_MODULE,
362};
363
364static const struct config_item_type comms_type = {
365 .ct_group_ops = &comms_ops,
366 .ct_owner = THIS_MODULE,
367};
368
369static const struct config_item_type comm_type = {
370 .ct_item_ops = &comm_ops,
371 .ct_attrs = comm_attrs,
372 .ct_owner = THIS_MODULE,
373};
374
375static const struct config_item_type nodes_type = {
376 .ct_group_ops = &nodes_ops,
377 .ct_owner = THIS_MODULE,
378};
379
380static const struct config_item_type node_type = {
381 .ct_item_ops = &node_ops,
382 .ct_attrs = node_attrs,
383 .ct_owner = THIS_MODULE,
384};
385
386static struct dlm_space *config_item_to_space(struct config_item *i)
387{
388 return i ? container_of(to_config_group(i), struct dlm_space, group) :
389 NULL;
390}
391
392static struct dlm_comm *config_item_to_comm(struct config_item *i)
393{
394 return i ? container_of(i, struct dlm_comm, item) : NULL;
395}
396
397static struct dlm_node *config_item_to_node(struct config_item *i)
398{
399 return i ? container_of(i, struct dlm_node, item) : NULL;
400}
401
402static struct config_group *make_cluster(struct config_group *g,
403 const char *name)
404{
405 struct dlm_cluster *cl = NULL;
406 struct dlm_spaces *sps = NULL;
407 struct dlm_comms *cms = NULL;
408
409 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
410 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
411 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
412
413 if (!cl || !sps || !cms)
414 goto fail;
415
416 cl->sps = sps;
417 cl->cms = cms;
418
419 config_group_init_type_name(&cl->group, name, &cluster_type);
420 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
421 config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
422
423 configfs_add_default_group(&sps->ss_group, &cl->group);
424 configfs_add_default_group(&cms->cs_group, &cl->group);
425
426 cl->cl_tcp_port = dlm_config.ci_tcp_port;
427 cl->cl_buffer_size = dlm_config.ci_buffer_size;
428 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
429 cl->cl_recover_timer = dlm_config.ci_recover_timer;
430 cl->cl_toss_secs = dlm_config.ci_toss_secs;
431 cl->cl_scan_secs = dlm_config.ci_scan_secs;
432 cl->cl_log_debug = dlm_config.ci_log_debug;
433 cl->cl_log_info = dlm_config.ci_log_info;
434 cl->cl_protocol = dlm_config.ci_protocol;
435 cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
436 cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
437 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
438 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
439 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
440 DLM_LOCKSPACE_LEN);
441
442 space_list = &sps->ss_group;
443 comm_list = &cms->cs_group;
444 return &cl->group;
445
446 fail:
447 kfree(cl);
448 kfree(sps);
449 kfree(cms);
450 return ERR_PTR(-ENOMEM);
451}
452
453static void drop_cluster(struct config_group *g, struct config_item *i)
454{
455 struct dlm_cluster *cl = config_item_to_cluster(i);
456
457 configfs_remove_default_groups(&cl->group);
458
459 space_list = NULL;
460 comm_list = NULL;
461
462 config_item_put(i);
463}
464
465static void release_cluster(struct config_item *i)
466{
467 struct dlm_cluster *cl = config_item_to_cluster(i);
468
469 kfree(cl->sps);
470 kfree(cl->cms);
471 kfree(cl);
472}
473
474static struct config_group *make_space(struct config_group *g, const char *name)
475{
476 struct dlm_space *sp = NULL;
477 struct dlm_nodes *nds = NULL;
478
479 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
480 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
481
482 if (!sp || !nds)
483 goto fail;
484
485 config_group_init_type_name(&sp->group, name, &space_type);
486
487 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
488 configfs_add_default_group(&nds->ns_group, &sp->group);
489
490 INIT_LIST_HEAD(&sp->members);
491 mutex_init(&sp->members_lock);
492 sp->members_count = 0;
493 sp->nds = nds;
494 return &sp->group;
495
496 fail:
497 kfree(sp);
498 kfree(nds);
499 return ERR_PTR(-ENOMEM);
500}
501
502static void drop_space(struct config_group *g, struct config_item *i)
503{
504 struct dlm_space *sp = config_item_to_space(i);
505
506
507
508 configfs_remove_default_groups(&sp->group);
509 config_item_put(i);
510}
511
512static void release_space(struct config_item *i)
513{
514 struct dlm_space *sp = config_item_to_space(i);
515 kfree(sp->nds);
516 kfree(sp);
517}
518
519static struct config_item *make_comm(struct config_group *g, const char *name)
520{
521 struct dlm_comm *cm;
522
523 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
524 if (!cm)
525 return ERR_PTR(-ENOMEM);
526
527 config_item_init_type_name(&cm->item, name, &comm_type);
528
529 cm->seq = dlm_comm_count++;
530 if (!cm->seq)
531 cm->seq = dlm_comm_count++;
532
533 cm->nodeid = -1;
534 cm->local = 0;
535 cm->addr_count = 0;
536 cm->mark = 0;
537 return &cm->item;
538}
539
540static void drop_comm(struct config_group *g, struct config_item *i)
541{
542 struct dlm_comm *cm = config_item_to_comm(i);
543 if (local_comm == cm)
544 local_comm = NULL;
545 dlm_midcomms_close(cm->nodeid);
546 while (cm->addr_count--)
547 kfree(cm->addr[cm->addr_count]);
548 config_item_put(i);
549}
550
551static void release_comm(struct config_item *i)
552{
553 struct dlm_comm *cm = config_item_to_comm(i);
554 kfree(cm);
555}
556
557static struct config_item *make_node(struct config_group *g, const char *name)
558{
559 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
560 struct dlm_node *nd;
561
562 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
563 if (!nd)
564 return ERR_PTR(-ENOMEM);
565
566 config_item_init_type_name(&nd->item, name, &node_type);
567 nd->nodeid = -1;
568 nd->weight = 1;
569 nd->new = 1;
570
571 mutex_lock(&sp->members_lock);
572 list_add(&nd->list, &sp->members);
573 sp->members_count++;
574 mutex_unlock(&sp->members_lock);
575
576 return &nd->item;
577}
578
579static void drop_node(struct config_group *g, struct config_item *i)
580{
581 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
582 struct dlm_node *nd = config_item_to_node(i);
583
584 mutex_lock(&sp->members_lock);
585 list_del(&nd->list);
586 sp->members_count--;
587 mutex_unlock(&sp->members_lock);
588
589 config_item_put(i);
590}
591
592static void release_node(struct config_item *i)
593{
594 struct dlm_node *nd = config_item_to_node(i);
595 kfree(nd);
596}
597
598static struct dlm_clusters clusters_root = {
599 .subsys = {
600 .su_group = {
601 .cg_item = {
602 .ci_namebuf = "dlm",
603 .ci_type = &clusters_type,
604 },
605 },
606 },
607};
608
609int __init dlm_config_init(void)
610{
611 config_group_init(&clusters_root.subsys.su_group);
612 mutex_init(&clusters_root.subsys.su_mutex);
613 return configfs_register_subsystem(&clusters_root.subsys);
614}
615
616void dlm_config_exit(void)
617{
618 configfs_unregister_subsystem(&clusters_root.subsys);
619}
620
621
622
623
624
625static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
626{
627 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid);
628}
629
630static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
631 size_t len)
632{
633 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid);
634
635 if (rc)
636 return rc;
637 return len;
638}
639
640static ssize_t comm_local_show(struct config_item *item, char *buf)
641{
642 return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
643}
644
645static ssize_t comm_local_store(struct config_item *item, const char *buf,
646 size_t len)
647{
648 struct dlm_comm *cm = config_item_to_comm(item);
649 int rc = kstrtoint(buf, 0, &cm->local);
650
651 if (rc)
652 return rc;
653 if (cm->local && !local_comm)
654 local_comm = cm;
655 return len;
656}
657
658static ssize_t comm_addr_store(struct config_item *item, const char *buf,
659 size_t len)
660{
661 struct dlm_comm *cm = config_item_to_comm(item);
662 struct sockaddr_storage *addr;
663 int rv;
664
665 if (len != sizeof(struct sockaddr_storage))
666 return -EINVAL;
667
668 if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
669 return -ENOSPC;
670
671 addr = kzalloc(sizeof(*addr), GFP_NOFS);
672 if (!addr)
673 return -ENOMEM;
674
675 memcpy(addr, buf, len);
676
677 rv = dlm_lowcomms_addr(cm->nodeid, addr, len);
678 if (rv) {
679 kfree(addr);
680 return rv;
681 }
682
683 cm->addr[cm->addr_count++] = addr;
684 return len;
685}
686
687static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
688{
689 struct dlm_comm *cm = config_item_to_comm(item);
690 ssize_t s;
691 ssize_t allowance;
692 int i;
693 struct sockaddr_storage *addr;
694 struct sockaddr_in *addr_in;
695 struct sockaddr_in6 *addr_in6;
696
697
698 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
699
700
701
702 allowance = 4096;
703 buf[0] = '\0';
704
705 for (i = 0; i < cm->addr_count; i++) {
706 addr = cm->addr[i];
707
708 switch(addr->ss_family) {
709 case AF_INET:
710 addr_in = (struct sockaddr_in *)addr;
711 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
712 break;
713 case AF_INET6:
714 addr_in6 = (struct sockaddr_in6 *)addr;
715 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
716 break;
717 default:
718 s = sprintf(buf0, "%s\n", "<UNKNOWN>");
719 break;
720 }
721 allowance -= s;
722 if (allowance >= 0)
723 strcat(buf, buf0);
724 else {
725 allowance += s;
726 break;
727 }
728 }
729 return 4096 - allowance;
730}
731
732static ssize_t comm_mark_show(struct config_item *item, char *buf)
733{
734 return sprintf(buf, "%u\n", config_item_to_comm(item)->mark);
735}
736
737static ssize_t comm_mark_store(struct config_item *item, const char *buf,
738 size_t len)
739{
740 struct dlm_comm *comm;
741 unsigned int mark;
742 int rc;
743
744 rc = kstrtouint(buf, 0, &mark);
745 if (rc)
746 return rc;
747
748 if (mark == 0)
749 mark = dlm_config.ci_mark;
750
751 comm = config_item_to_comm(item);
752 rc = dlm_lowcomms_nodes_set_mark(comm->nodeid, mark);
753 if (rc)
754 return rc;
755
756 comm->mark = mark;
757 return len;
758}
759
760CONFIGFS_ATTR(comm_, nodeid);
761CONFIGFS_ATTR(comm_, local);
762CONFIGFS_ATTR(comm_, mark);
763CONFIGFS_ATTR_WO(comm_, addr);
764CONFIGFS_ATTR_RO(comm_, addr_list);
765
766static struct configfs_attribute *comm_attrs[] = {
767 [COMM_ATTR_NODEID] = &comm_attr_nodeid,
768 [COMM_ATTR_LOCAL] = &comm_attr_local,
769 [COMM_ATTR_ADDR] = &comm_attr_addr,
770 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
771 [COMM_ATTR_MARK] = &comm_attr_mark,
772 NULL,
773};
774
775static ssize_t node_nodeid_show(struct config_item *item, char *buf)
776{
777 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid);
778}
779
780static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
781 size_t len)
782{
783 struct dlm_node *nd = config_item_to_node(item);
784 uint32_t seq = 0;
785 int rc = kstrtoint(buf, 0, &nd->nodeid);
786
787 if (rc)
788 return rc;
789 dlm_comm_seq(nd->nodeid, &seq);
790 nd->comm_seq = seq;
791 return len;
792}
793
794static ssize_t node_weight_show(struct config_item *item, char *buf)
795{
796 return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
797}
798
799static ssize_t node_weight_store(struct config_item *item, const char *buf,
800 size_t len)
801{
802 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
803
804 if (rc)
805 return rc;
806 return len;
807}
808
809CONFIGFS_ATTR(node_, nodeid);
810CONFIGFS_ATTR(node_, weight);
811
812static struct configfs_attribute *node_attrs[] = {
813 [NODE_ATTR_NODEID] = &node_attr_nodeid,
814 [NODE_ATTR_WEIGHT] = &node_attr_weight,
815 NULL,
816};
817
818
819
820
821
822static struct dlm_space *get_space(char *name)
823{
824 struct config_item *i;
825
826 if (!space_list)
827 return NULL;
828
829 mutex_lock(&space_list->cg_subsys->su_mutex);
830 i = config_group_find_item(space_list, name);
831 mutex_unlock(&space_list->cg_subsys->su_mutex);
832
833 return config_item_to_space(i);
834}
835
836static void put_space(struct dlm_space *sp)
837{
838 config_item_put(&sp->group.cg_item);
839}
840
841static struct dlm_comm *get_comm(int nodeid)
842{
843 struct config_item *i;
844 struct dlm_comm *cm = NULL;
845 int found = 0;
846
847 if (!comm_list)
848 return NULL;
849
850 mutex_lock(&clusters_root.subsys.su_mutex);
851
852 list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
853 cm = config_item_to_comm(i);
854
855 if (cm->nodeid != nodeid)
856 continue;
857 found = 1;
858 config_item_get(i);
859 break;
860 }
861 mutex_unlock(&clusters_root.subsys.su_mutex);
862
863 if (!found)
864 cm = NULL;
865 return cm;
866}
867
868static void put_comm(struct dlm_comm *cm)
869{
870 config_item_put(&cm->item);
871}
872
873
874int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
875 int *count_out)
876{
877 struct dlm_space *sp;
878 struct dlm_node *nd;
879 struct dlm_config_node *nodes, *node;
880 int rv, count;
881
882 sp = get_space(lsname);
883 if (!sp)
884 return -EEXIST;
885
886 mutex_lock(&sp->members_lock);
887 if (!sp->members_count) {
888 rv = -EINVAL;
889 printk(KERN_ERR "dlm: zero members_count\n");
890 goto out;
891 }
892
893 count = sp->members_count;
894
895 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
896 if (!nodes) {
897 rv = -ENOMEM;
898 goto out;
899 }
900
901 node = nodes;
902 list_for_each_entry(nd, &sp->members, list) {
903 node->nodeid = nd->nodeid;
904 node->weight = nd->weight;
905 node->new = nd->new;
906 node->comm_seq = nd->comm_seq;
907 node++;
908
909 nd->new = 0;
910 }
911
912 *count_out = count;
913 *nodes_out = nodes;
914 rv = 0;
915 out:
916 mutex_unlock(&sp->members_lock);
917 put_space(sp);
918 return rv;
919}
920
921int dlm_comm_seq(int nodeid, uint32_t *seq)
922{
923 struct dlm_comm *cm = get_comm(nodeid);
924 if (!cm)
925 return -EEXIST;
926 *seq = cm->seq;
927 put_comm(cm);
928 return 0;
929}
930
931int dlm_our_nodeid(void)
932{
933 return local_comm ? local_comm->nodeid : 0;
934}
935
936
937int dlm_our_addr(struct sockaddr_storage *addr, int num)
938{
939 if (!local_comm)
940 return -1;
941 if (num + 1 > local_comm->addr_count)
942 return -1;
943 memcpy(addr, local_comm->addr[num], sizeof(*addr));
944 return 0;
945}
946
947
948#define DEFAULT_TCP_PORT 21064
949#define DEFAULT_RSBTBL_SIZE 1024
950#define DEFAULT_RECOVER_TIMER 5
951#define DEFAULT_TOSS_SECS 10
952#define DEFAULT_SCAN_SECS 5
953#define DEFAULT_LOG_DEBUG 0
954#define DEFAULT_LOG_INFO 1
955#define DEFAULT_PROTOCOL DLM_PROTO_TCP
956#define DEFAULT_MARK 0
957#define DEFAULT_TIMEWARN_CS 500
958#define DEFAULT_WAITWARN_US 0
959#define DEFAULT_NEW_RSB_COUNT 128
960#define DEFAULT_RECOVER_CALLBACKS 0
961#define DEFAULT_CLUSTER_NAME ""
962
963struct dlm_config_info dlm_config = {
964 .ci_tcp_port = DEFAULT_TCP_PORT,
965 .ci_buffer_size = DLM_MAX_SOCKET_BUFSIZE,
966 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
967 .ci_recover_timer = DEFAULT_RECOVER_TIMER,
968 .ci_toss_secs = DEFAULT_TOSS_SECS,
969 .ci_scan_secs = DEFAULT_SCAN_SECS,
970 .ci_log_debug = DEFAULT_LOG_DEBUG,
971 .ci_log_info = DEFAULT_LOG_INFO,
972 .ci_protocol = DEFAULT_PROTOCOL,
973 .ci_mark = DEFAULT_MARK,
974 .ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
975 .ci_waitwarn_us = DEFAULT_WAITWARN_US,
976 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
977 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
978 .ci_cluster_name = DEFAULT_CLUSTER_NAME
979};
980
981
