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Merge tag 'pci-v6.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
[linux-2.6-block.git] / fs / dlm / config.c
... / ...
CommitLineData
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 (refers to <node>)
28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
29 * /config/dlm/<cluster>/comms/<comm>/nodeid (refers to <comm>)
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
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
66const 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
74struct dlm_cluster {
75 struct config_group group;
76 struct dlm_spaces *sps;
77 struct dlm_comms *cms;
78};
79
80static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
81{
82 return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
83 NULL;
84}
85
86enum {
87 CLUSTER_ATTR_TCP_PORT = 0,
88 CLUSTER_ATTR_BUFFER_SIZE,
89 CLUSTER_ATTR_RSBTBL_SIZE,
90 CLUSTER_ATTR_RECOVER_TIMER,
91 CLUSTER_ATTR_TOSS_SECS,
92 CLUSTER_ATTR_SCAN_SECS,
93 CLUSTER_ATTR_LOG_DEBUG,
94 CLUSTER_ATTR_LOG_INFO,
95 CLUSTER_ATTR_PROTOCOL,
96 CLUSTER_ATTR_MARK,
97 CLUSTER_ATTR_NEW_RSB_COUNT,
98 CLUSTER_ATTR_RECOVER_CALLBACKS,
99 CLUSTER_ATTR_CLUSTER_NAME,
100};
101
102static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
103{
104 return sprintf(buf, "%s\n", dlm_config.ci_cluster_name);
105}
106
107static ssize_t cluster_cluster_name_store(struct config_item *item,
108 const char *buf, size_t len)
109{
110 strscpy(dlm_config.ci_cluster_name, buf,
111 sizeof(dlm_config.ci_cluster_name));
112 return len;
113}
114
115CONFIGFS_ATTR(cluster_, cluster_name);
116
117static ssize_t cluster_tcp_port_show(struct config_item *item, char *buf)
118{
119 return sprintf(buf, "%u\n", be16_to_cpu(dlm_config.ci_tcp_port));
120}
121
122static int dlm_check_zero_and_dlm_running(unsigned int x)
123{
124 if (!x)
125 return -EINVAL;
126
127 if (dlm_lowcomms_is_running())
128 return -EBUSY;
129
130 return 0;
131}
132
133static ssize_t cluster_tcp_port_store(struct config_item *item,
134 const char *buf, size_t len)
135{
136 int rc;
137 u16 x;
138
139 if (!capable(CAP_SYS_ADMIN))
140 return -EPERM;
141
142 rc = kstrtou16(buf, 0, &x);
143 if (rc)
144 return rc;
145
146 rc = dlm_check_zero_and_dlm_running(x);
147 if (rc)
148 return rc;
149
150 dlm_config.ci_tcp_port = cpu_to_be16(x);
151 return len;
152}
153
154CONFIGFS_ATTR(cluster_, tcp_port);
155
156static ssize_t cluster_set(unsigned int *info_field,
157 int (*check_cb)(unsigned int x),
158 const char *buf, size_t len)
159{
160 unsigned int x;
161 int rc;
162
163 if (!capable(CAP_SYS_ADMIN))
164 return -EPERM;
165 rc = kstrtouint(buf, 0, &x);
166 if (rc)
167 return rc;
168
169 if (check_cb) {
170 rc = check_cb(x);
171 if (rc)
172 return rc;
173 }
174
175 *info_field = x;
176
177 return len;
178}
179
180#define CLUSTER_ATTR(name, check_cb) \
181static ssize_t cluster_##name##_store(struct config_item *item, \
182 const char *buf, size_t len) \
183{ \
184 return cluster_set(&dlm_config.ci_##name, check_cb, buf, len); \
185} \
186static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
187{ \
188 return snprintf(buf, PAGE_SIZE, "%u\n", dlm_config.ci_##name); \
189} \
190CONFIGFS_ATTR(cluster_, name);
191
192static int dlm_check_protocol_and_dlm_running(unsigned int x)
193{
194 switch (x) {
195 case 0:
196 /* TCP */
197 break;
198 case 1:
199 /* SCTP */
200 if (!IS_ENABLED(CONFIG_IP_SCTP))
201 return -EOPNOTSUPP;
202
203 break;
204 default:
205 return -EINVAL;
206 }
207
208 if (dlm_lowcomms_is_running())
209 return -EBUSY;
210
211 return 0;
212}
213
214static int dlm_check_zero(unsigned int x)
215{
216 if (!x)
217 return -EINVAL;
218
219 return 0;
220}
221
222static int dlm_check_buffer_size(unsigned int x)
223{
224 if (x < DLM_MAX_SOCKET_BUFSIZE)
225 return -EINVAL;
226
227 return 0;
228}
229
230CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);
231CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);
232CLUSTER_ATTR(recover_timer, dlm_check_zero);
233CLUSTER_ATTR(toss_secs, dlm_check_zero);
234CLUSTER_ATTR(scan_secs, dlm_check_zero);
235CLUSTER_ATTR(log_debug, NULL);
236CLUSTER_ATTR(log_info, NULL);
237CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running);
238CLUSTER_ATTR(mark, NULL);
239CLUSTER_ATTR(new_rsb_count, NULL);
240CLUSTER_ATTR(recover_callbacks, NULL);
241
242static struct configfs_attribute *cluster_attrs[] = {
243 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
244 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
245 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
246 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
247 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
248 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
249 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
250 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info,
251 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
252 [CLUSTER_ATTR_MARK] = &cluster_attr_mark,
253 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
254 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
255 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
256 NULL,
257};
258
259enum {
260 COMM_ATTR_NODEID = 0,
261 COMM_ATTR_LOCAL,
262 COMM_ATTR_ADDR,
263 COMM_ATTR_ADDR_LIST,
264 COMM_ATTR_MARK,
265};
266
267enum {
268 NODE_ATTR_NODEID = 0,
269 NODE_ATTR_WEIGHT,
270};
271
272struct dlm_clusters {
273 struct configfs_subsystem subsys;
274};
275
276struct dlm_spaces {
277 struct config_group ss_group;
278};
279
280struct dlm_space {
281 struct config_group group;
282 struct list_head members;
283 struct mutex members_lock;
284 int members_count;
285 struct dlm_nodes *nds;
286};
287
288struct dlm_comms {
289 struct config_group cs_group;
290};
291
292struct dlm_comm {
293 struct config_item item;
294 int seq;
295 int nodeid;
296 int local;
297 int addr_count;
298 unsigned int mark;
299 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
300};
301
302struct dlm_nodes {
303 struct config_group ns_group;
304};
305
306struct dlm_node {
307 struct config_item item;
308 struct list_head list; /* space->members */
309 int nodeid;
310 int weight;
311 int new;
312 int comm_seq; /* copy of cm->seq when nd->nodeid is set */
313};
314
315static struct configfs_group_operations clusters_ops = {
316 .make_group = make_cluster,
317 .drop_item = drop_cluster,
318};
319
320static struct configfs_item_operations cluster_ops = {
321 .release = release_cluster,
322};
323
324static struct configfs_group_operations spaces_ops = {
325 .make_group = make_space,
326 .drop_item = drop_space,
327};
328
329static struct configfs_item_operations space_ops = {
330 .release = release_space,
331};
332
333static struct configfs_group_operations comms_ops = {
334 .make_item = make_comm,
335 .drop_item = drop_comm,
336};
337
338static struct configfs_item_operations comm_ops = {
339 .release = release_comm,
340};
341
342static struct configfs_group_operations nodes_ops = {
343 .make_item = make_node,
344 .drop_item = drop_node,
345};
346
347static struct configfs_item_operations node_ops = {
348 .release = release_node,
349};
350
351static const struct config_item_type clusters_type = {
352 .ct_group_ops = &clusters_ops,
353 .ct_owner = THIS_MODULE,
354};
355
356static const struct config_item_type cluster_type = {
357 .ct_item_ops = &cluster_ops,
358 .ct_attrs = cluster_attrs,
359 .ct_owner = THIS_MODULE,
360};
361
362static const struct config_item_type spaces_type = {
363 .ct_group_ops = &spaces_ops,
364 .ct_owner = THIS_MODULE,
365};
366
367static const struct config_item_type space_type = {
368 .ct_item_ops = &space_ops,
369 .ct_owner = THIS_MODULE,
370};
371
372static const struct config_item_type comms_type = {
373 .ct_group_ops = &comms_ops,
374 .ct_owner = THIS_MODULE,
375};
376
377static const struct config_item_type comm_type = {
378 .ct_item_ops = &comm_ops,
379 .ct_attrs = comm_attrs,
380 .ct_owner = THIS_MODULE,
381};
382
383static const struct config_item_type nodes_type = {
384 .ct_group_ops = &nodes_ops,
385 .ct_owner = THIS_MODULE,
386};
387
388static const struct config_item_type node_type = {
389 .ct_item_ops = &node_ops,
390 .ct_attrs = node_attrs,
391 .ct_owner = THIS_MODULE,
392};
393
394static struct dlm_space *config_item_to_space(struct config_item *i)
395{
396 return i ? container_of(to_config_group(i), struct dlm_space, group) :
397 NULL;
398}
399
400static struct dlm_comm *config_item_to_comm(struct config_item *i)
401{
402 return i ? container_of(i, struct dlm_comm, item) : NULL;
403}
404
405static struct dlm_node *config_item_to_node(struct config_item *i)
406{
407 return i ? container_of(i, struct dlm_node, item) : NULL;
408}
409
410static struct config_group *make_cluster(struct config_group *g,
411 const char *name)
412{
413 struct dlm_cluster *cl = NULL;
414 struct dlm_spaces *sps = NULL;
415 struct dlm_comms *cms = NULL;
416
417 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
418 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
419 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
420
421 if (!cl || !sps || !cms)
422 goto fail;
423
424 cl->sps = sps;
425 cl->cms = cms;
426
427 config_group_init_type_name(&cl->group, name, &cluster_type);
428 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
429 config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
430
431 configfs_add_default_group(&sps->ss_group, &cl->group);
432 configfs_add_default_group(&cms->cs_group, &cl->group);
433
434 space_list = &sps->ss_group;
435 comm_list = &cms->cs_group;
436 return &cl->group;
437
438 fail:
439 kfree(cl);
440 kfree(sps);
441 kfree(cms);
442 return ERR_PTR(-ENOMEM);
443}
444
445static void drop_cluster(struct config_group *g, struct config_item *i)
446{
447 struct dlm_cluster *cl = config_item_to_cluster(i);
448
449 configfs_remove_default_groups(&cl->group);
450
451 space_list = NULL;
452 comm_list = NULL;
453
454 config_item_put(i);
455}
456
457static void release_cluster(struct config_item *i)
458{
459 struct dlm_cluster *cl = config_item_to_cluster(i);
460
461 kfree(cl->sps);
462 kfree(cl->cms);
463 kfree(cl);
464}
465
466static struct config_group *make_space(struct config_group *g, const char *name)
467{
468 struct dlm_space *sp = NULL;
469 struct dlm_nodes *nds = NULL;
470
471 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
472 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
473
474 if (!sp || !nds)
475 goto fail;
476
477 config_group_init_type_name(&sp->group, name, &space_type);
478
479 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
480 configfs_add_default_group(&nds->ns_group, &sp->group);
481
482 INIT_LIST_HEAD(&sp->members);
483 mutex_init(&sp->members_lock);
484 sp->members_count = 0;
485 sp->nds = nds;
486 return &sp->group;
487
488 fail:
489 kfree(sp);
490 kfree(nds);
491 return ERR_PTR(-ENOMEM);
492}
493
494static void drop_space(struct config_group *g, struct config_item *i)
495{
496 struct dlm_space *sp = config_item_to_space(i);
497
498 /* assert list_empty(&sp->members) */
499
500 configfs_remove_default_groups(&sp->group);
501 config_item_put(i);
502}
503
504static void release_space(struct config_item *i)
505{
506 struct dlm_space *sp = config_item_to_space(i);
507 kfree(sp->nds);
508 kfree(sp);
509}
510
511static struct config_item *make_comm(struct config_group *g, const char *name)
512{
513 struct dlm_comm *cm;
514 unsigned int nodeid;
515 int rv;
516
517 rv = kstrtouint(name, 0, &nodeid);
518 if (rv)
519 return ERR_PTR(rv);
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 = nodeid;
532 cm->local = 0;
533 cm->addr_count = 0;
534 cm->mark = 0;
535 return &cm->item;
536}
537
538static 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
549static void release_comm(struct config_item *i)
550{
551 struct dlm_comm *cm = config_item_to_comm(i);
552 kfree(cm);
553}
554
555static 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 unsigned int nodeid;
559 struct dlm_node *nd;
560 uint32_t seq = 0;
561 int rv;
562
563 rv = kstrtouint(name, 0, &nodeid);
564 if (rv)
565 return ERR_PTR(rv);
566
567 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
568 if (!nd)
569 return ERR_PTR(-ENOMEM);
570
571 config_item_init_type_name(&nd->item, name, &node_type);
572 nd->nodeid = nodeid;
573 nd->weight = 1; /* default weight of 1 if none is set */
574 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */
575 dlm_comm_seq(nodeid, &seq, true);
576 nd->comm_seq = seq;
577
578 mutex_lock(&sp->members_lock);
579 list_add(&nd->list, &sp->members);
580 sp->members_count++;
581 mutex_unlock(&sp->members_lock);
582
583 return &nd->item;
584}
585
586static void drop_node(struct config_group *g, struct config_item *i)
587{
588 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
589 struct dlm_node *nd = config_item_to_node(i);
590
591 mutex_lock(&sp->members_lock);
592 list_del(&nd->list);
593 sp->members_count--;
594 mutex_unlock(&sp->members_lock);
595
596 config_item_put(i);
597}
598
599static void release_node(struct config_item *i)
600{
601 struct dlm_node *nd = config_item_to_node(i);
602 kfree(nd);
603}
604
605static struct dlm_clusters clusters_root = {
606 .subsys = {
607 .su_group = {
608 .cg_item = {
609 .ci_namebuf = "dlm",
610 .ci_type = &clusters_type,
611 },
612 },
613 },
614};
615
616int __init dlm_config_init(void)
617{
618 config_group_init(&clusters_root.subsys.su_group);
619 mutex_init(&clusters_root.subsys.su_mutex);
620 return configfs_register_subsystem(&clusters_root.subsys);
621}
622
623void dlm_config_exit(void)
624{
625 configfs_unregister_subsystem(&clusters_root.subsys);
626}
627
628/*
629 * Functions for user space to read/write attributes
630 */
631
632static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
633{
634 unsigned int nodeid;
635 int rv;
636
637 rv = kstrtouint(config_item_name(item), 0, &nodeid);
638 if (WARN_ON(rv))
639 return rv;
640
641 return sprintf(buf, "%u\n", nodeid);
642}
643
644static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
645 size_t len)
646{
647 return len;
648}
649
650static ssize_t comm_local_show(struct config_item *item, char *buf)
651{
652 return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
653}
654
655static ssize_t comm_local_store(struct config_item *item, const char *buf,
656 size_t len)
657{
658 struct dlm_comm *cm = config_item_to_comm(item);
659 int rc = kstrtoint(buf, 0, &cm->local);
660
661 if (rc)
662 return rc;
663 if (cm->local && !local_comm)
664 local_comm = cm;
665 return len;
666}
667
668static ssize_t comm_addr_store(struct config_item *item, const char *buf,
669 size_t len)
670{
671 struct dlm_comm *cm = config_item_to_comm(item);
672 struct sockaddr_storage *addr;
673 int rv;
674
675 if (len != sizeof(struct sockaddr_storage))
676 return -EINVAL;
677
678 if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
679 return -ENOSPC;
680
681 addr = kzalloc(sizeof(*addr), GFP_NOFS);
682 if (!addr)
683 return -ENOMEM;
684
685 memcpy(addr, buf, len);
686
687 rv = dlm_midcomms_addr(cm->nodeid, addr);
688 if (rv) {
689 kfree(addr);
690 return rv;
691 }
692
693 cm->addr[cm->addr_count++] = addr;
694 return len;
695}
696
697static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
698{
699 struct dlm_comm *cm = config_item_to_comm(item);
700 ssize_t s;
701 ssize_t allowance;
702 int i;
703 struct sockaddr_storage *addr;
704 struct sockaddr_in *addr_in;
705 struct sockaddr_in6 *addr_in6;
706
707 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */
708 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
709
710
711 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */
712 allowance = 4096;
713 buf[0] = '\0';
714
715 for (i = 0; i < cm->addr_count; i++) {
716 addr = cm->addr[i];
717
718 switch(addr->ss_family) {
719 case AF_INET:
720 addr_in = (struct sockaddr_in *)addr;
721 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
722 break;
723 case AF_INET6:
724 addr_in6 = (struct sockaddr_in6 *)addr;
725 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
726 break;
727 default:
728 s = sprintf(buf0, "%s\n", "<UNKNOWN>");
729 break;
730 }
731 allowance -= s;
732 if (allowance >= 0)
733 strcat(buf, buf0);
734 else {
735 allowance += s;
736 break;
737 }
738 }
739 return 4096 - allowance;
740}
741
742static ssize_t comm_mark_show(struct config_item *item, char *buf)
743{
744 return sprintf(buf, "%u\n", config_item_to_comm(item)->mark);
745}
746
747static ssize_t comm_mark_store(struct config_item *item, const char *buf,
748 size_t len)
749{
750 struct dlm_comm *comm;
751 unsigned int mark;
752 int rc;
753
754 rc = kstrtouint(buf, 0, &mark);
755 if (rc)
756 return rc;
757
758 if (mark == 0)
759 mark = dlm_config.ci_mark;
760
761 comm = config_item_to_comm(item);
762 rc = dlm_lowcomms_nodes_set_mark(comm->nodeid, mark);
763 if (rc)
764 return rc;
765
766 comm->mark = mark;
767 return len;
768}
769
770CONFIGFS_ATTR(comm_, nodeid);
771CONFIGFS_ATTR(comm_, local);
772CONFIGFS_ATTR(comm_, mark);
773CONFIGFS_ATTR_WO(comm_, addr);
774CONFIGFS_ATTR_RO(comm_, addr_list);
775
776static struct configfs_attribute *comm_attrs[] = {
777 [COMM_ATTR_NODEID] = &comm_attr_nodeid,
778 [COMM_ATTR_LOCAL] = &comm_attr_local,
779 [COMM_ATTR_ADDR] = &comm_attr_addr,
780 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
781 [COMM_ATTR_MARK] = &comm_attr_mark,
782 NULL,
783};
784
785static ssize_t node_nodeid_show(struct config_item *item, char *buf)
786{
787 unsigned int nodeid;
788 int rv;
789
790 rv = kstrtouint(config_item_name(item), 0, &nodeid);
791 if (WARN_ON(rv))
792 return rv;
793
794 return sprintf(buf, "%u\n", nodeid);
795}
796
797static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
798 size_t len)
799{
800 return len;
801}
802
803static ssize_t node_weight_show(struct config_item *item, char *buf)
804{
805 return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
806}
807
808static ssize_t node_weight_store(struct config_item *item, const char *buf,
809 size_t len)
810{
811 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
812
813 if (rc)
814 return rc;
815 return len;
816}
817
818CONFIGFS_ATTR(node_, nodeid);
819CONFIGFS_ATTR(node_, weight);
820
821static struct configfs_attribute *node_attrs[] = {
822 [NODE_ATTR_NODEID] = &node_attr_nodeid,
823 [NODE_ATTR_WEIGHT] = &node_attr_weight,
824 NULL,
825};
826
827/*
828 * Functions for the dlm to get the info that's been configured
829 */
830
831static struct dlm_space *get_space(char *name)
832{
833 struct config_item *i;
834
835 if (!space_list)
836 return NULL;
837
838 mutex_lock(&space_list->cg_subsys->su_mutex);
839 i = config_group_find_item(space_list, name);
840 mutex_unlock(&space_list->cg_subsys->su_mutex);
841
842 return config_item_to_space(i);
843}
844
845static void put_space(struct dlm_space *sp)
846{
847 config_item_put(&sp->group.cg_item);
848}
849
850static struct dlm_comm *get_comm(int nodeid)
851{
852 struct config_item *i;
853 struct dlm_comm *cm = NULL;
854 int found = 0;
855
856 if (!comm_list)
857 return NULL;
858
859 WARN_ON_ONCE(!mutex_is_locked(&clusters_root.subsys.su_mutex));
860
861 list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
862 cm = config_item_to_comm(i);
863
864 if (cm->nodeid != nodeid)
865 continue;
866 found = 1;
867 config_item_get(i);
868 break;
869 }
870
871 if (!found)
872 cm = NULL;
873 return cm;
874}
875
876static void put_comm(struct dlm_comm *cm)
877{
878 config_item_put(&cm->item);
879}
880
881/* caller must free mem */
882int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
883 int *count_out)
884{
885 struct dlm_space *sp;
886 struct dlm_node *nd;
887 struct dlm_config_node *nodes, *node;
888 int rv, count;
889
890 sp = get_space(lsname);
891 if (!sp)
892 return -EEXIST;
893
894 mutex_lock(&sp->members_lock);
895 if (!sp->members_count) {
896 rv = -EINVAL;
897 printk(KERN_ERR "dlm: zero members_count\n");
898 goto out;
899 }
900
901 count = sp->members_count;
902
903 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
904 if (!nodes) {
905 rv = -ENOMEM;
906 goto out;
907 }
908
909 node = nodes;
910 list_for_each_entry(nd, &sp->members, list) {
911 node->nodeid = nd->nodeid;
912 node->weight = nd->weight;
913 node->new = nd->new;
914 node->comm_seq = nd->comm_seq;
915 node++;
916
917 nd->new = 0;
918 }
919
920 *count_out = count;
921 *nodes_out = nodes;
922 rv = 0;
923 out:
924 mutex_unlock(&sp->members_lock);
925 put_space(sp);
926 return rv;
927}
928
929int dlm_comm_seq(int nodeid, uint32_t *seq, bool locked)
930{
931 struct dlm_comm *cm;
932
933 if (locked) {
934 cm = get_comm(nodeid);
935 } else {
936 mutex_lock(&clusters_root.subsys.su_mutex);
937 cm = get_comm(nodeid);
938 mutex_unlock(&clusters_root.subsys.su_mutex);
939 }
940 if (!cm)
941 return -ENOENT;
942
943 *seq = cm->seq;
944 put_comm(cm);
945 return 0;
946}
947
948int dlm_our_nodeid(void)
949{
950 return local_comm->nodeid;
951}
952
953/* num 0 is first addr, num 1 is second addr */
954int dlm_our_addr(struct sockaddr_storage *addr, int num)
955{
956 if (!local_comm)
957 return -1;
958 if (num + 1 > local_comm->addr_count)
959 return -1;
960 memcpy(addr, local_comm->addr[num], sizeof(*addr));
961 return 0;
962}
963
964/* Config file defaults */
965#define DEFAULT_TCP_PORT 21064
966#define DEFAULT_RSBTBL_SIZE 1024
967#define DEFAULT_RECOVER_TIMER 5
968#define DEFAULT_TOSS_SECS 10
969#define DEFAULT_SCAN_SECS 5
970#define DEFAULT_LOG_DEBUG 0
971#define DEFAULT_LOG_INFO 1
972#define DEFAULT_PROTOCOL DLM_PROTO_TCP
973#define DEFAULT_MARK 0
974#define DEFAULT_NEW_RSB_COUNT 128
975#define DEFAULT_RECOVER_CALLBACKS 0
976#define DEFAULT_CLUSTER_NAME ""
977
978struct dlm_config_info dlm_config = {
979 .ci_tcp_port = cpu_to_be16(DEFAULT_TCP_PORT),
980 .ci_buffer_size = DLM_MAX_SOCKET_BUFSIZE,
981 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
982 .ci_recover_timer = DEFAULT_RECOVER_TIMER,
983 .ci_toss_secs = DEFAULT_TOSS_SECS,
984 .ci_scan_secs = DEFAULT_SCAN_SECS,
985 .ci_log_debug = DEFAULT_LOG_DEBUG,
986 .ci_log_info = DEFAULT_LOG_INFO,
987 .ci_protocol = DEFAULT_PROTOCOL,
988 .ci_mark = DEFAULT_MARK,
989 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
990 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
991 .ci_cluster_name = DEFAULT_CLUSTER_NAME
992};
993
Linux 6.x block layer and io_uring tree(s)