1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *******************************************************************************
4 **
5 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
6 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
7 **
8 **
9 *******************************************************************************
10 ******************************************************************************/
11
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 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
29 * /config/dlm/<cluster>/comms/<comm>/nodeid
30 * /config/dlm/<cluster>/comms/<comm>/local
31 * /config/dlm/<cluster>/comms/<comm>/addr (write only)
32 * /config/dlm/<cluster>/comms/<comm>/addr_list (read only)
33 * The <cluster> level is useless, but I haven't figured out how to avoid it.
34 */
35
36 static struct config_group *space_list;
37 static struct config_group *comm_list;
38 static struct dlm_comm *local_comm;
39 static uint32_t dlm_comm_count;
40
41 struct dlm_clusters;
42 struct dlm_cluster;
43 struct dlm_spaces;
44 struct dlm_space;
45 struct dlm_comms;
46 struct dlm_comm;
47 struct dlm_nodes;
48 struct dlm_node;
49
50 static struct config_group *make_cluster(struct config_group *, const char *);
51 static void drop_cluster(struct config_group *, struct config_item *);
52 static void release_cluster(struct config_item *);
53 static struct config_group *make_space(struct config_group *, const char *);
54 static void drop_space(struct config_group *, struct config_item *);
55 static void release_space(struct config_item *);
56 static struct config_item *make_comm(struct config_group *, const char *);
57 static void drop_comm(struct config_group *, struct config_item *);
58 static void release_comm(struct config_item *);
59 static struct config_item *make_node(struct config_group *, const char *);
60 static void drop_node(struct config_group *, struct config_item *);
61 static void release_node(struct config_item *);
62
63 static struct configfs_attribute *comm_attrs[];
64 static struct configfs_attribute *node_attrs[];
65
66 const struct rhashtable_params dlm_rhash_rsb_params = {
67 .nelem_hint = 3, /* start small */
68 .key_len = DLM_RESNAME_MAXLEN,
69 .key_offset = offsetof(struct dlm_rsb, res_name),
70 .head_offset = offsetof(struct dlm_rsb, res_node),
71 .automatic_shrinking = true,
72 };
73
74 struct dlm_cluster {
75 struct config_group group;
76 unsigned int cl_tcp_port;
77 unsigned int cl_buffer_size;
78 unsigned int cl_rsbtbl_size;
79 unsigned int cl_recover_timer;
80 unsigned int cl_toss_secs;
81 unsigned int cl_scan_secs;
82 unsigned int cl_log_debug;
83 unsigned int cl_log_info;
84 unsigned int cl_protocol;
85 unsigned int cl_mark;
86 unsigned int cl_new_rsb_count;
87 unsigned int cl_recover_callbacks;
88 char cl_cluster_name[DLM_LOCKSPACE_LEN];
89
90 struct dlm_spaces *sps;
91 struct dlm_comms *cms;
92 };
93
94 static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
95 {
96 return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
97 NULL;
98 }
99
100 enum {
101 CLUSTER_ATTR_TCP_PORT = 0,
102 CLUSTER_ATTR_BUFFER_SIZE,
103 CLUSTER_ATTR_RSBTBL_SIZE,
104 CLUSTER_ATTR_RECOVER_TIMER,
105 CLUSTER_ATTR_TOSS_SECS,
106 CLUSTER_ATTR_SCAN_SECS,
107 CLUSTER_ATTR_LOG_DEBUG,
108 CLUSTER_ATTR_LOG_INFO,
109 CLUSTER_ATTR_PROTOCOL,
110 CLUSTER_ATTR_MARK,
111 CLUSTER_ATTR_NEW_RSB_COUNT,
112 CLUSTER_ATTR_RECOVER_CALLBACKS,
113 CLUSTER_ATTR_CLUSTER_NAME,
114 };
115
116 static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
117 {
118 struct dlm_cluster *cl = config_item_to_cluster(item);
119 return sprintf(buf, "%s\n", cl->cl_cluster_name);
120 }
121
122 static ssize_t cluster_cluster_name_store(struct config_item *item,
123 const char *buf, size_t len)
124 {
125 struct dlm_cluster *cl = config_item_to_cluster(item);
126
127 strscpy(dlm_config.ci_cluster_name, buf,
128 sizeof(dlm_config.ci_cluster_name));
129 strscpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
130 return len;
131 }
132
133 CONFIGFS_ATTR(cluster_, cluster_name);
134
135 static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
136 int *info_field, int (*check_cb)(unsigned int x),
137 const char *buf, size_t len)
138 {
139 unsigned int x;
140 int rc;
141
142 if (!capable(CAP_SYS_ADMIN))
143 return -EPERM;
144 rc = kstrtouint(buf, 0, &x);
145 if (rc)
146 return rc;
147
148 if (check_cb) {
149 rc = check_cb(x);
150 if (rc)
151 return rc;
152 }
153
154 *cl_field = x;
155 *info_field = x;
156
157 return len;
158 }
159
160 #define CLUSTER_ATTR(name, check_cb) \
161 static ssize_t cluster_##name##_store(struct config_item *item, \
162 const char *buf, size_t len) \
163 { \
164 struct dlm_cluster *cl = config_item_to_cluster(item); \
165 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
166 check_cb, buf, len); \
167 } \
168 static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
169 { \
170 struct dlm_cluster *cl = config_item_to_cluster(item); \
171 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
172 } \
173 CONFIGFS_ATTR(cluster_, name);
174
175 static int dlm_check_protocol_and_dlm_running(unsigned int x)
176 {
177 switch (x) {
178 case 0:
179 /* TCP */
180 break;
181 case 1:
182 /* SCTP */
183 break;
184 default:
185 return -EINVAL;
186 }
187
188 if (dlm_lowcomms_is_running())
189 return -EBUSY;
190
191 return 0;
192 }
193
194 static int dlm_check_zero_and_dlm_running(unsigned int x)
195 {
196 if (!x)
197 return -EINVAL;
198
199 if (dlm_lowcomms_is_running())
200 return -EBUSY;
201
202 return 0;
203 }
204
205 static int dlm_check_zero(unsigned int x)
206 {
207 if (!x)
208 return -EINVAL;
209
210 return 0;
211 }
212
213 static int dlm_check_buffer_size(unsigned int x)
214 {
215 if (x < DLM_MAX_SOCKET_BUFSIZE)
216 return -EINVAL;
217
218 return 0;
219 }
220
221 CLUSTER_ATTR(tcp_port, dlm_check_zero_and_dlm_running);
222 CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);
223 CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);
224 CLUSTER_ATTR(recover_timer, dlm_check_zero);
225 CLUSTER_ATTR(toss_secs, dlm_check_zero);
226 CLUSTER_ATTR(scan_secs, dlm_check_zero);
227 CLUSTER_ATTR(log_debug, NULL);
228 CLUSTER_ATTR(log_info, NULL);
229 CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running);
230 CLUSTER_ATTR(mark, NULL);
231 CLUSTER_ATTR(new_rsb_count, NULL);
232 CLUSTER_ATTR(recover_callbacks, NULL);
233
234 static struct configfs_attribute *cluster_attrs[] = {
235 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
236 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
237 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
238 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
239 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
240 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
241 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
242 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info,
243 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
244 [CLUSTER_ATTR_MARK] = &cluster_attr_mark,
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
251 enum {
252 COMM_ATTR_NODEID = 0,
253 COMM_ATTR_LOCAL,
254 COMM_ATTR_ADDR,
255 COMM_ATTR_ADDR_LIST,
256 COMM_ATTR_MARK,
257 };
258
259 enum {
260 NODE_ATTR_NODEID = 0,
261 NODE_ATTR_WEIGHT,
262 };
263
264 struct dlm_clusters {
265 struct configfs_subsystem subsys;
266 };
267
268 struct dlm_spaces {
269 struct config_group ss_group;
270 };
271
272 struct 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
280 struct dlm_comms {
281 struct config_group cs_group;
282 };
283
284 struct 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
294 struct dlm_nodes {
295 struct config_group ns_group;
296 };
297
298 struct dlm_node {
299 struct config_item item;
300 struct list_head list; /* space->members */
301 int nodeid;
302 int weight;
303 int new;
304 int comm_seq; /* copy of cm->seq when nd->nodeid is set */
305 };
306
307 static struct configfs_group_operations clusters_ops = {
308 .make_group = make_cluster,
309 .drop_item = drop_cluster,
310 };
311
312 static struct configfs_item_operations cluster_ops = {
313 .release = release_cluster,
314 };
315
316 static struct configfs_group_operations spaces_ops = {
317 .make_group = make_space,
318 .drop_item = drop_space,
319 };
320
321 static struct configfs_item_operations space_ops = {
322 .release = release_space,
323 };
324
325 static struct configfs_group_operations comms_ops = {
326 .make_item = make_comm,
327 .drop_item = drop_comm,
328 };
329
330 static struct configfs_item_operations comm_ops = {
331 .release = release_comm,
332 };
333
334 static struct configfs_group_operations nodes_ops = {
335 .make_item = make_node,
336 .drop_item = drop_node,
337 };
338
339 static struct configfs_item_operations node_ops = {
340 .release = release_node,
341 };
342
343 static const struct config_item_type clusters_type = {
344 .ct_group_ops = &clusters_ops,
345 .ct_owner = THIS_MODULE,
346 };
347
348 static 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
354 static const struct config_item_type spaces_type = {
355 .ct_group_ops = &spaces_ops,
356 .ct_owner = THIS_MODULE,
357 };
358
359 static const struct config_item_type space_type = {
360 .ct_item_ops = &space_ops,
361 .ct_owner = THIS_MODULE,
362 };
363
364 static const struct config_item_type comms_type = {
365 .ct_group_ops = &comms_ops,
366 .ct_owner = THIS_MODULE,
367 };
368
369 static 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
375 static const struct config_item_type nodes_type = {
376 .ct_group_ops = &nodes_ops,
377 .ct_owner = THIS_MODULE,
378 };
379
380 static 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
386 static 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
392 static 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
397 static 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
402 static 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_new_rsb_count = dlm_config.ci_new_rsb_count;
436 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
437 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
438 DLM_LOCKSPACE_LEN);
439
440 space_list = &sps->ss_group;
441 comm_list = &cms->cs_group;
442 return &cl->group;
443
444 fail:
445 kfree(cl);
446 kfree(sps);
447 kfree(cms);
448 return ERR_PTR(-ENOMEM);
449 }
450
451 static void drop_cluster(struct config_group *g, struct config_item *i)
452 {
453 struct dlm_cluster *cl = config_item_to_cluster(i);
454
455 configfs_remove_default_groups(&cl->group);
456
457 space_list = NULL;
458 comm_list = NULL;
459
460 config_item_put(i);
461 }
462
463 static void release_cluster(struct config_item *i)
464 {
465 struct dlm_cluster *cl = config_item_to_cluster(i);
466
467 kfree(cl->sps);
468 kfree(cl->cms);
469 kfree(cl);
470 }
471
472 static struct config_group *make_space(struct config_group *g, const char *name)
473 {
474 struct dlm_space *sp = NULL;
475 struct dlm_nodes *nds = NULL;
476
477 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
478 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
479
480 if (!sp || !nds)
481 goto fail;
482
483 config_group_init_type_name(&sp->group, name, &space_type);
484
485 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
486 configfs_add_default_group(&nds->ns_group, &sp->group);
487
488 INIT_LIST_HEAD(&sp->members);
489 mutex_init(&sp->members_lock);
490 sp->members_count = 0;
491 sp->nds = nds;
492 return &sp->group;
493
494 fail:
495 kfree(sp);
496 kfree(nds);
497 return ERR_PTR(-ENOMEM);
498 }
499
500 static void drop_space(struct config_group *g, struct config_item *i)
501 {
502 struct dlm_space *sp = config_item_to_space(i);
503
504 /* assert list_empty(&sp->members) */
505
506 configfs_remove_default_groups(&sp->group);
507 config_item_put(i);
508 }
509
510 static void release_space(struct config_item *i)
511 {
512 struct dlm_space *sp = config_item_to_space(i);
513 kfree(sp->nds);
514 kfree(sp);
515 }
516
517 static struct config_item *make_comm(struct config_group *g, const char *name)
518 {
519 struct dlm_comm *cm;
520
521 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
522 if (!cm)
523 return ERR_PTR(-ENOMEM);
524
525 config_item_init_type_name(&cm->item, name, &comm_type);
526
527 cm->seq = dlm_comm_count++;
528 if (!cm->seq)
529 cm->seq = dlm_comm_count++;
530
531 cm->nodeid = -1;
532 cm->local = 0;
533 cm->addr_count = 0;
534 cm->mark = 0;
535 return &cm->item;
536 }
537
538 static void drop_comm(struct config_group *g, struct config_item *i)
539 {
540 struct dlm_comm *cm = config_item_to_comm(i);
541 if (local_comm == cm)
542 local_comm = NULL;
543 dlm_midcomms_close(cm->nodeid);
544 while (cm->addr_count--)
545 kfree(cm->addr[cm->addr_count]);
546 config_item_put(i);
547 }
548
549 static void release_comm(struct config_item *i)
550 {
551 struct dlm_comm *cm = config_item_to_comm(i);
552 kfree(cm);
553 }
554
555 static struct config_item *make_node(struct config_group *g, const char *name)
556 {
557 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
558 struct dlm_node *nd;
559
560 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
561 if (!nd)
562 return ERR_PTR(-ENOMEM);
563
564 config_item_init_type_name(&nd->item, name, &node_type);
565 nd->nodeid = -1;
566 nd->weight = 1; /* default weight of 1 if none is set */
567 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */
568
569 mutex_lock(&sp->members_lock);
570 list_add(&nd->list, &sp->members);
571 sp->members_count++;
572 mutex_unlock(&sp->members_lock);
573
574 return &nd->item;
575 }
576
577 static void drop_node(struct config_group *g, struct config_item *i)
578 {
579 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
580 struct dlm_node *nd = config_item_to_node(i);
581
582 mutex_lock(&sp->members_lock);
583 list_del(&nd->list);
584 sp->members_count--;
585 mutex_unlock(&sp->members_lock);
586
587 config_item_put(i);
588 }
589
590 static void release_node(struct config_item *i)
591 {
592 struct dlm_node *nd = config_item_to_node(i);
593 kfree(nd);
594 }
595
596 static struct dlm_clusters clusters_root = {
597 .subsys = {
598 .su_group = {
599 .cg_item = {
600 .ci_namebuf = "dlm",
601 .ci_type = &clusters_type,
602 },
603 },
604 },
605 };
606
607 int __init dlm_config_init(void)
608 {
609 config_group_init(&clusters_root.subsys.su_group);
610 mutex_init(&clusters_root.subsys.su_mutex);
611 return configfs_register_subsystem(&clusters_root.subsys);
612 }
613
614 void dlm_config_exit(void)
615 {
616 configfs_unregister_subsystem(&clusters_root.subsys);
617 }
618
619 /*
620 * Functions for user space to read/write attributes
621 */
622
623 static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
624 {
625 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid);
626 }
627
628 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
629 size_t len)
630 {
631 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid);
632
633 if (rc)
634 return rc;
635 return len;
636 }
637
638 static ssize_t comm_local_show(struct config_item *item, char *buf)
639 {
640 return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
641 }
642
643 static ssize_t comm_local_store(struct config_item *item, const char *buf,
644 size_t len)
645 {
646 struct dlm_comm *cm = config_item_to_comm(item);
647 int rc = kstrtoint(buf, 0, &cm->local);
648
649 if (rc)
650 return rc;
651 if (cm->local && !local_comm)
652 local_comm = cm;
653 return len;
654 }
655
656 static ssize_t comm_addr_store(struct config_item *item, const char *buf,
657 size_t len)
658 {
659 struct dlm_comm *cm = config_item_to_comm(item);
660 struct sockaddr_storage *addr;
661 int rv;
662
663 if (len != sizeof(struct sockaddr_storage))
664 return -EINVAL;
665
666 if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
667 return -ENOSPC;
668
669 addr = kzalloc(sizeof(*addr), GFP_NOFS);
670 if (!addr)
671 return -ENOMEM;
672
673 memcpy(addr, buf, len);
674
675 rv = dlm_midcomms_addr(cm->nodeid, addr);
676 if (rv) {
677 kfree(addr);
678 return rv;
679 }
680
681 cm->addr[cm->addr_count++] = addr;
682 return len;
683 }
684
685 static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
686 {
687 struct dlm_comm *cm = config_item_to_comm(item);
688 ssize_t s;
689 ssize_t allowance;
690 int i;
691 struct sockaddr_storage *addr;
692 struct sockaddr_in *addr_in;
693 struct sockaddr_in6 *addr_in6;
694
695 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */
696 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
697
698
699 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */
700 allowance = 4096;
701 buf[0] = '\0';
702
703 for (i = 0; i < cm->addr_count; i++) {
704 addr = cm->addr[i];
705
706 switch(addr->ss_family) {
707 case AF_INET:
708 addr_in = (struct sockaddr_in *)addr;
709 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
710 break;
711 case AF_INET6:
712 addr_in6 = (struct sockaddr_in6 *)addr;
713 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
714 break;
715 default:
716 s = sprintf(buf0, "%s\n", "<UNKNOWN>");
717 break;
718 }
719 allowance -= s;
720 if (allowance >= 0)
721 strcat(buf, buf0);
722 else {
723 allowance += s;
724 break;
725 }
726 }
727 return 4096 - allowance;
728 }
729
730 static ssize_t comm_mark_show(struct config_item *item, char *buf)
731 {
732 return sprintf(buf, "%u\n", config_item_to_comm(item)->mark);
733 }
734
735 static ssize_t comm_mark_store(struct config_item *item, const char *buf,
736 size_t len)
737 {
738 struct dlm_comm *comm;
739 unsigned int mark;
740 int rc;
741
742 rc = kstrtouint(buf, 0, &mark);
743 if (rc)
744 return rc;
745
746 if (mark == 0)
747 mark = dlm_config.ci_mark;
748
749 comm = config_item_to_comm(item);
750 rc = dlm_lowcomms_nodes_set_mark(comm->nodeid, mark);
751 if (rc)
752 return rc;
753
754 comm->mark = mark;
755 return len;
756 }
757
758 CONFIGFS_ATTR(comm_, nodeid);
759 CONFIGFS_ATTR(comm_, local);
760 CONFIGFS_ATTR(comm_, mark);
761 CONFIGFS_ATTR_WO(comm_, addr);
762 CONFIGFS_ATTR_RO(comm_, addr_list);
763
764 static struct configfs_attribute *comm_attrs[] = {
765 [COMM_ATTR_NODEID] = &comm_attr_nodeid,
766 [COMM_ATTR_LOCAL] = &comm_attr_local,
767 [COMM_ATTR_ADDR] = &comm_attr_addr,
768 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
769 [COMM_ATTR_MARK] = &comm_attr_mark,
770 NULL,
771 };
772
773 static ssize_t node_nodeid_show(struct config_item *item, char *buf)
774 {
775 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid);
776 }
777
778 static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
779 size_t len)
780 {
781 struct dlm_node *nd = config_item_to_node(item);
782 uint32_t seq = 0;
783 int rc = kstrtoint(buf, 0, &nd->nodeid);
784
785 if (rc)
786 return rc;
787 dlm_comm_seq(nd->nodeid, &seq);
788 nd->comm_seq = seq;
789 return len;
790 }
791
792 static ssize_t node_weight_show(struct config_item *item, char *buf)
793 {
794 return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
795 }
796
797 static ssize_t node_weight_store(struct config_item *item, const char *buf,
798 size_t len)
799 {
800 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
801
802 if (rc)
803 return rc;
804 return len;
805 }
806
807 CONFIGFS_ATTR(node_, nodeid);
808 CONFIGFS_ATTR(node_, weight);
809
810 static struct configfs_attribute *node_attrs[] = {
811 [NODE_ATTR_NODEID] = &node_attr_nodeid,
812 [NODE_ATTR_WEIGHT] = &node_attr_weight,
813 NULL,
814 };
815
816 /*
817 * Functions for the dlm to get the info that's been configured
818 */
819
820 static struct dlm_space *get_space(char *name)
821 {
822 struct config_item *i;
823
824 if (!space_list)
825 return NULL;
826
827 mutex_lock(&space_list->cg_subsys->su_mutex);
828 i = config_group_find_item(space_list, name);
829 mutex_unlock(&space_list->cg_subsys->su_mutex);
830
831 return config_item_to_space(i);
832 }
833
834 static void put_space(struct dlm_space *sp)
835 {
836 config_item_put(&sp->group.cg_item);
837 }
838
839 static struct dlm_comm *get_comm(int nodeid)
840 {
841 struct config_item *i;
842 struct dlm_comm *cm = NULL;
843 int found = 0;
844
845 if (!comm_list)
846 return NULL;
847
848 mutex_lock(&clusters_root.subsys.su_mutex);
849
850 list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
851 cm = config_item_to_comm(i);
852
853 if (cm->nodeid != nodeid)
854 continue;
855 found = 1;
856 config_item_get(i);
857 break;
858 }
859 mutex_unlock(&clusters_root.subsys.su_mutex);
860
861 if (!found)
862 cm = NULL;
863 return cm;
864 }
865
866 static void put_comm(struct dlm_comm *cm)
867 {
868 config_item_put(&cm->item);
869 }
870
871 /* caller must free mem */
872 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
873 int *count_out)
874 {
875 struct dlm_space *sp;
876 struct dlm_node *nd;
877 struct dlm_config_node *nodes, *node;
878 int rv, count;
879
880 sp = get_space(lsname);
881 if (!sp)
882 return -EEXIST;
883
884 mutex_lock(&sp->members_lock);
885 if (!sp->members_count) {
886 rv = -EINVAL;
887 printk(KERN_ERR "dlm: zero members_count\n");
888 goto out;
889 }
890
891 count = sp->members_count;
892
893 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
894 if (!nodes) {
895 rv = -ENOMEM;
896 goto out;
897 }
898
899 node = nodes;
900 list_for_each_entry(nd, &sp->members, list) {
901 node->nodeid = nd->nodeid;
902 node->weight = nd->weight;
903 node->new = nd->new;
904 node->comm_seq = nd->comm_seq;
905 node++;
906
907 nd->new = 0;
908 }
909
910 *count_out = count;
911 *nodes_out = nodes;
912 rv = 0;
913 out:
914 mutex_unlock(&sp->members_lock);
915 put_space(sp);
916 return rv;
917 }
918
919 int dlm_comm_seq(int nodeid, uint32_t *seq)
920 {
921 struct dlm_comm *cm = get_comm(nodeid);
922 if (!cm)
923 return -EEXIST;
924 *seq = cm->seq;
925 put_comm(cm);
926 return 0;
927 }
928
929 int dlm_our_nodeid(void)
930 {
931 return local_comm ? local_comm->nodeid : 0;
932 }
933
934 /* num 0 is first addr, num 1 is second addr */
935 int dlm_our_addr(struct sockaddr_storage *addr, int num)
936 {
937 if (!local_comm)
938 return -1;
939 if (num + 1 > local_comm->addr_count)
940 return -1;
941 memcpy(addr, local_comm->addr[num], sizeof(*addr));
942 return 0;
943 }
944
945 /* Config file defaults */
946 #define DEFAULT_TCP_PORT 21064
947 #define DEFAULT_RSBTBL_SIZE 1024
948 #define DEFAULT_RECOVER_TIMER 5
949 #define DEFAULT_TOSS_SECS 10
950 #define DEFAULT_SCAN_SECS 5
951 #define DEFAULT_LOG_DEBUG 0
952 #define DEFAULT_LOG_INFO 1
953 #define DEFAULT_PROTOCOL DLM_PROTO_TCP
954 #define DEFAULT_MARK 0
955 #define DEFAULT_NEW_RSB_COUNT 128
956 #define DEFAULT_RECOVER_CALLBACKS 0
957 #define DEFAULT_CLUSTER_NAME ""
958
959 struct dlm_config_info dlm_config = {
960 .ci_tcp_port = DEFAULT_TCP_PORT,
961 .ci_buffer_size = DLM_MAX_SOCKET_BUFSIZE,
962 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
963 .ci_recover_timer = DEFAULT_RECOVER_TIMER,
964 .ci_toss_secs = DEFAULT_TOSS_SECS,
965 .ci_scan_secs = DEFAULT_SCAN_SECS,
966 .ci_log_debug = DEFAULT_LOG_DEBUG,
967 .ci_log_info = DEFAULT_LOG_INFO,
968 .ci_protocol = DEFAULT_PROTOCOL,
969 .ci_mark = DEFAULT_MARK,
970 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
971 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
972 .ci_cluster_name = DEFAULT_CLUSTER_NAME
973 };
974
975
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