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 "lowcomms.h"
24
25 /*
26 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
27 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
28 * /config/dlm/<cluster>/comms/<comm>/nodeid
29 * /config/dlm/<cluster>/comms/<comm>/local
30 * /config/dlm/<cluster>/comms/<comm>/addr (write only)
31 * /config/dlm/<cluster>/comms/<comm>/addr_list (read only)
32 * The <cluster> level is useless, but I haven't figured out how to avoid it.
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_mark;
77 unsigned int cl_timewarn_cs;
78 unsigned int cl_waitwarn_us;
79 unsigned int cl_new_rsb_count;
80 unsigned int cl_recover_callbacks;
81 char cl_cluster_name[DLM_LOCKSPACE_LEN];
82
83 struct dlm_spaces *sps;
84 struct dlm_comms *cms;
85 };
86
config_item_to_cluster(struct config_item * i)87 static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
88 {
89 return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
90 NULL;
91 }
92
93 enum {
94 CLUSTER_ATTR_TCP_PORT = 0,
95 CLUSTER_ATTR_BUFFER_SIZE,
96 CLUSTER_ATTR_RSBTBL_SIZE,
97 CLUSTER_ATTR_RECOVER_TIMER,
98 CLUSTER_ATTR_TOSS_SECS,
99 CLUSTER_ATTR_SCAN_SECS,
100 CLUSTER_ATTR_LOG_DEBUG,
101 CLUSTER_ATTR_LOG_INFO,
102 CLUSTER_ATTR_PROTOCOL,
103 CLUSTER_ATTR_MARK,
104 CLUSTER_ATTR_TIMEWARN_CS,
105 CLUSTER_ATTR_WAITWARN_US,
106 CLUSTER_ATTR_NEW_RSB_COUNT,
107 CLUSTER_ATTR_RECOVER_CALLBACKS,
108 CLUSTER_ATTR_CLUSTER_NAME,
109 };
110
cluster_cluster_name_show(struct config_item * item,char * buf)111 static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
112 {
113 struct dlm_cluster *cl = config_item_to_cluster(item);
114 return sprintf(buf, "%s\n", cl->cl_cluster_name);
115 }
116
cluster_cluster_name_store(struct config_item * item,const char * buf,size_t len)117 static ssize_t cluster_cluster_name_store(struct config_item *item,
118 const char *buf, size_t len)
119 {
120 struct dlm_cluster *cl = config_item_to_cluster(item);
121
122 strlcpy(dlm_config.ci_cluster_name, buf,
123 sizeof(dlm_config.ci_cluster_name));
124 strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
125 return len;
126 }
127
128 CONFIGFS_ATTR(cluster_, cluster_name);
129
cluster_set(struct dlm_cluster * cl,unsigned int * cl_field,int * info_field,int (* check_cb)(unsigned int x),const char * buf,size_t len)130 static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
131 int *info_field, int (*check_cb)(unsigned int x),
132 const char *buf, size_t len)
133 {
134 unsigned int x;
135 int rc;
136
137 if (!capable(CAP_SYS_ADMIN))
138 return -EPERM;
139 rc = kstrtouint(buf, 0, &x);
140 if (rc)
141 return rc;
142
143 if (check_cb) {
144 rc = check_cb(x);
145 if (rc)
146 return rc;
147 }
148
149 *cl_field = x;
150 *info_field = x;
151
152 return len;
153 }
154
155 #define CLUSTER_ATTR(name, check_cb) \
156 static ssize_t cluster_##name##_store(struct config_item *item, \
157 const char *buf, size_t len) \
158 { \
159 struct dlm_cluster *cl = config_item_to_cluster(item); \
160 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
161 check_cb, buf, len); \
162 } \
163 static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
164 { \
165 struct dlm_cluster *cl = config_item_to_cluster(item); \
166 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
167 } \
168 CONFIGFS_ATTR(cluster_, name);
169
dlm_check_zero(unsigned int x)170 static int dlm_check_zero(unsigned int x)
171 {
172 if (!x)
173 return -EINVAL;
174
175 return 0;
176 }
177
dlm_check_buffer_size(unsigned int x)178 static int dlm_check_buffer_size(unsigned int x)
179 {
180 if (x < DEFAULT_BUFFER_SIZE)
181 return -EINVAL;
182
183 return 0;
184 }
185
186 CLUSTER_ATTR(tcp_port, dlm_check_zero);
187 CLUSTER_ATTR(buffer_size, dlm_check_buffer_size);
188 CLUSTER_ATTR(rsbtbl_size, dlm_check_zero);
189 CLUSTER_ATTR(recover_timer, dlm_check_zero);
190 CLUSTER_ATTR(toss_secs, dlm_check_zero);
191 CLUSTER_ATTR(scan_secs, dlm_check_zero);
192 CLUSTER_ATTR(log_debug, NULL);
193 CLUSTER_ATTR(log_info, NULL);
194 CLUSTER_ATTR(protocol, NULL);
195 CLUSTER_ATTR(mark, NULL);
196 CLUSTER_ATTR(timewarn_cs, dlm_check_zero);
197 CLUSTER_ATTR(waitwarn_us, NULL);
198 CLUSTER_ATTR(new_rsb_count, NULL);
199 CLUSTER_ATTR(recover_callbacks, NULL);
200
201 static struct configfs_attribute *cluster_attrs[] = {
202 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
203 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
204 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
205 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
206 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
207 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
208 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
209 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info,
210 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
211 [CLUSTER_ATTR_MARK] = &cluster_attr_mark,
212 [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs,
213 [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us,
214 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
215 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
216 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
217 NULL,
218 };
219
220 enum {
221 COMM_ATTR_NODEID = 0,
222 COMM_ATTR_LOCAL,
223 COMM_ATTR_ADDR,
224 COMM_ATTR_ADDR_LIST,
225 COMM_ATTR_MARK,
226 };
227
228 enum {
229 NODE_ATTR_NODEID = 0,
230 NODE_ATTR_WEIGHT,
231 };
232
233 struct dlm_clusters {
234 struct configfs_subsystem subsys;
235 };
236
237 struct dlm_spaces {
238 struct config_group ss_group;
239 };
240
241 struct dlm_space {
242 struct config_group group;
243 struct list_head members;
244 struct mutex members_lock;
245 int members_count;
246 struct dlm_nodes *nds;
247 };
248
249 struct dlm_comms {
250 struct config_group cs_group;
251 };
252
253 struct dlm_comm {
254 struct config_item item;
255 int seq;
256 int nodeid;
257 int local;
258 int addr_count;
259 unsigned int mark;
260 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
261 };
262
263 struct dlm_nodes {
264 struct config_group ns_group;
265 };
266
267 struct dlm_node {
268 struct config_item item;
269 struct list_head list; /* space->members */
270 int nodeid;
271 int weight;
272 int new;
273 int comm_seq; /* copy of cm->seq when nd->nodeid is set */
274 };
275
276 static struct configfs_group_operations clusters_ops = {
277 .make_group = make_cluster,
278 .drop_item = drop_cluster,
279 };
280
281 static struct configfs_item_operations cluster_ops = {
282 .release = release_cluster,
283 };
284
285 static struct configfs_group_operations spaces_ops = {
286 .make_group = make_space,
287 .drop_item = drop_space,
288 };
289
290 static struct configfs_item_operations space_ops = {
291 .release = release_space,
292 };
293
294 static struct configfs_group_operations comms_ops = {
295 .make_item = make_comm,
296 .drop_item = drop_comm,
297 };
298
299 static struct configfs_item_operations comm_ops = {
300 .release = release_comm,
301 };
302
303 static struct configfs_group_operations nodes_ops = {
304 .make_item = make_node,
305 .drop_item = drop_node,
306 };
307
308 static struct configfs_item_operations node_ops = {
309 .release = release_node,
310 };
311
312 static const struct config_item_type clusters_type = {
313 .ct_group_ops = &clusters_ops,
314 .ct_owner = THIS_MODULE,
315 };
316
317 static const struct config_item_type cluster_type = {
318 .ct_item_ops = &cluster_ops,
319 .ct_attrs = cluster_attrs,
320 .ct_owner = THIS_MODULE,
321 };
322
323 static const struct config_item_type spaces_type = {
324 .ct_group_ops = &spaces_ops,
325 .ct_owner = THIS_MODULE,
326 };
327
328 static const struct config_item_type space_type = {
329 .ct_item_ops = &space_ops,
330 .ct_owner = THIS_MODULE,
331 };
332
333 static const struct config_item_type comms_type = {
334 .ct_group_ops = &comms_ops,
335 .ct_owner = THIS_MODULE,
336 };
337
338 static const struct config_item_type comm_type = {
339 .ct_item_ops = &comm_ops,
340 .ct_attrs = comm_attrs,
341 .ct_owner = THIS_MODULE,
342 };
343
344 static const struct config_item_type nodes_type = {
345 .ct_group_ops = &nodes_ops,
346 .ct_owner = THIS_MODULE,
347 };
348
349 static const struct config_item_type node_type = {
350 .ct_item_ops = &node_ops,
351 .ct_attrs = node_attrs,
352 .ct_owner = THIS_MODULE,
353 };
354
config_item_to_space(struct config_item * i)355 static struct dlm_space *config_item_to_space(struct config_item *i)
356 {
357 return i ? container_of(to_config_group(i), struct dlm_space, group) :
358 NULL;
359 }
360
config_item_to_comm(struct config_item * i)361 static struct dlm_comm *config_item_to_comm(struct config_item *i)
362 {
363 return i ? container_of(i, struct dlm_comm, item) : NULL;
364 }
365
config_item_to_node(struct config_item * i)366 static struct dlm_node *config_item_to_node(struct config_item *i)
367 {
368 return i ? container_of(i, struct dlm_node, item) : NULL;
369 }
370
make_cluster(struct config_group * g,const char * name)371 static struct config_group *make_cluster(struct config_group *g,
372 const char *name)
373 {
374 struct dlm_cluster *cl = NULL;
375 struct dlm_spaces *sps = NULL;
376 struct dlm_comms *cms = NULL;
377
378 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
379 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
380 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
381
382 if (!cl || !sps || !cms)
383 goto fail;
384
385 cl->sps = sps;
386 cl->cms = cms;
387
388 config_group_init_type_name(&cl->group, name, &cluster_type);
389 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
390 config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
391
392 configfs_add_default_group(&sps->ss_group, &cl->group);
393 configfs_add_default_group(&cms->cs_group, &cl->group);
394
395 cl->cl_tcp_port = dlm_config.ci_tcp_port;
396 cl->cl_buffer_size = dlm_config.ci_buffer_size;
397 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
398 cl->cl_recover_timer = dlm_config.ci_recover_timer;
399 cl->cl_toss_secs = dlm_config.ci_toss_secs;
400 cl->cl_scan_secs = dlm_config.ci_scan_secs;
401 cl->cl_log_debug = dlm_config.ci_log_debug;
402 cl->cl_log_info = dlm_config.ci_log_info;
403 cl->cl_protocol = dlm_config.ci_protocol;
404 cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
405 cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
406 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
407 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
408 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
409 DLM_LOCKSPACE_LEN);
410
411 space_list = &sps->ss_group;
412 comm_list = &cms->cs_group;
413 return &cl->group;
414
415 fail:
416 kfree(cl);
417 kfree(sps);
418 kfree(cms);
419 return ERR_PTR(-ENOMEM);
420 }
421
drop_cluster(struct config_group * g,struct config_item * i)422 static void drop_cluster(struct config_group *g, struct config_item *i)
423 {
424 struct dlm_cluster *cl = config_item_to_cluster(i);
425
426 configfs_remove_default_groups(&cl->group);
427
428 space_list = NULL;
429 comm_list = NULL;
430
431 config_item_put(i);
432 }
433
release_cluster(struct config_item * i)434 static void release_cluster(struct config_item *i)
435 {
436 struct dlm_cluster *cl = config_item_to_cluster(i);
437
438 kfree(cl->sps);
439 kfree(cl->cms);
440 kfree(cl);
441 }
442
make_space(struct config_group * g,const char * name)443 static struct config_group *make_space(struct config_group *g, const char *name)
444 {
445 struct dlm_space *sp = NULL;
446 struct dlm_nodes *nds = NULL;
447
448 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
449 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
450
451 if (!sp || !nds)
452 goto fail;
453
454 config_group_init_type_name(&sp->group, name, &space_type);
455
456 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
457 configfs_add_default_group(&nds->ns_group, &sp->group);
458
459 INIT_LIST_HEAD(&sp->members);
460 mutex_init(&sp->members_lock);
461 sp->members_count = 0;
462 sp->nds = nds;
463 return &sp->group;
464
465 fail:
466 kfree(sp);
467 kfree(nds);
468 return ERR_PTR(-ENOMEM);
469 }
470
drop_space(struct config_group * g,struct config_item * i)471 static void drop_space(struct config_group *g, struct config_item *i)
472 {
473 struct dlm_space *sp = config_item_to_space(i);
474
475 /* assert list_empty(&sp->members) */
476
477 configfs_remove_default_groups(&sp->group);
478 config_item_put(i);
479 }
480
release_space(struct config_item * i)481 static void release_space(struct config_item *i)
482 {
483 struct dlm_space *sp = config_item_to_space(i);
484 kfree(sp->nds);
485 kfree(sp);
486 }
487
make_comm(struct config_group * g,const char * name)488 static struct config_item *make_comm(struct config_group *g, const char *name)
489 {
490 struct dlm_comm *cm;
491
492 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
493 if (!cm)
494 return ERR_PTR(-ENOMEM);
495
496 config_item_init_type_name(&cm->item, name, &comm_type);
497
498 cm->seq = dlm_comm_count++;
499 if (!cm->seq)
500 cm->seq = dlm_comm_count++;
501
502 cm->nodeid = -1;
503 cm->local = 0;
504 cm->addr_count = 0;
505 cm->mark = 0;
506 return &cm->item;
507 }
508
drop_comm(struct config_group * g,struct config_item * i)509 static void drop_comm(struct config_group *g, struct config_item *i)
510 {
511 struct dlm_comm *cm = config_item_to_comm(i);
512 if (local_comm == cm)
513 local_comm = NULL;
514 dlm_lowcomms_close(cm->nodeid);
515 while (cm->addr_count--)
516 kfree(cm->addr[cm->addr_count]);
517 config_item_put(i);
518 }
519
release_comm(struct config_item * i)520 static void release_comm(struct config_item *i)
521 {
522 struct dlm_comm *cm = config_item_to_comm(i);
523 kfree(cm);
524 }
525
make_node(struct config_group * g,const char * name)526 static struct config_item *make_node(struct config_group *g, const char *name)
527 {
528 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
529 struct dlm_node *nd;
530
531 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
532 if (!nd)
533 return ERR_PTR(-ENOMEM);
534
535 config_item_init_type_name(&nd->item, name, &node_type);
536 nd->nodeid = -1;
537 nd->weight = 1; /* default weight of 1 if none is set */
538 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */
539
540 mutex_lock(&sp->members_lock);
541 list_add(&nd->list, &sp->members);
542 sp->members_count++;
543 mutex_unlock(&sp->members_lock);
544
545 return &nd->item;
546 }
547
drop_node(struct config_group * g,struct config_item * i)548 static void drop_node(struct config_group *g, struct config_item *i)
549 {
550 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
551 struct dlm_node *nd = config_item_to_node(i);
552
553 mutex_lock(&sp->members_lock);
554 list_del(&nd->list);
555 sp->members_count--;
556 mutex_unlock(&sp->members_lock);
557
558 config_item_put(i);
559 }
560
release_node(struct config_item * i)561 static void release_node(struct config_item *i)
562 {
563 struct dlm_node *nd = config_item_to_node(i);
564 kfree(nd);
565 }
566
567 static struct dlm_clusters clusters_root = {
568 .subsys = {
569 .su_group = {
570 .cg_item = {
571 .ci_namebuf = "dlm",
572 .ci_type = &clusters_type,
573 },
574 },
575 },
576 };
577
dlm_config_init(void)578 int __init dlm_config_init(void)
579 {
580 config_group_init(&clusters_root.subsys.su_group);
581 mutex_init(&clusters_root.subsys.su_mutex);
582 return configfs_register_subsystem(&clusters_root.subsys);
583 }
584
dlm_config_exit(void)585 void dlm_config_exit(void)
586 {
587 configfs_unregister_subsystem(&clusters_root.subsys);
588 }
589
590 /*
591 * Functions for user space to read/write attributes
592 */
593
comm_nodeid_show(struct config_item * item,char * buf)594 static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
595 {
596 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid);
597 }
598
comm_nodeid_store(struct config_item * item,const char * buf,size_t len)599 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
600 size_t len)
601 {
602 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid);
603
604 if (rc)
605 return rc;
606 return len;
607 }
608
comm_local_show(struct config_item * item,char * buf)609 static ssize_t comm_local_show(struct config_item *item, char *buf)
610 {
611 return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
612 }
613
comm_local_store(struct config_item * item,const char * buf,size_t len)614 static ssize_t comm_local_store(struct config_item *item, const char *buf,
615 size_t len)
616 {
617 struct dlm_comm *cm = config_item_to_comm(item);
618 int rc = kstrtoint(buf, 0, &cm->local);
619
620 if (rc)
621 return rc;
622 if (cm->local && !local_comm)
623 local_comm = cm;
624 return len;
625 }
626
comm_addr_store(struct config_item * item,const char * buf,size_t len)627 static ssize_t comm_addr_store(struct config_item *item, const char *buf,
628 size_t len)
629 {
630 struct dlm_comm *cm = config_item_to_comm(item);
631 struct sockaddr_storage *addr;
632 int rv;
633
634 if (len != sizeof(struct sockaddr_storage))
635 return -EINVAL;
636
637 if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
638 return -ENOSPC;
639
640 addr = kzalloc(sizeof(*addr), GFP_NOFS);
641 if (!addr)
642 return -ENOMEM;
643
644 memcpy(addr, buf, len);
645
646 rv = dlm_lowcomms_addr(cm->nodeid, addr, len);
647 if (rv) {
648 kfree(addr);
649 return rv;
650 }
651
652 cm->addr[cm->addr_count++] = addr;
653 return len;
654 }
655
comm_addr_list_show(struct config_item * item,char * buf)656 static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
657 {
658 struct dlm_comm *cm = config_item_to_comm(item);
659 ssize_t s;
660 ssize_t allowance;
661 int i;
662 struct sockaddr_storage *addr;
663 struct sockaddr_in *addr_in;
664 struct sockaddr_in6 *addr_in6;
665
666 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */
667 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
668
669
670 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */
671 allowance = 4096;
672 buf[0] = '\0';
673
674 for (i = 0; i < cm->addr_count; i++) {
675 addr = cm->addr[i];
676
677 switch(addr->ss_family) {
678 case AF_INET:
679 addr_in = (struct sockaddr_in *)addr;
680 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
681 break;
682 case AF_INET6:
683 addr_in6 = (struct sockaddr_in6 *)addr;
684 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
685 break;
686 default:
687 s = sprintf(buf0, "%s\n", "<UNKNOWN>");
688 break;
689 }
690 allowance -= s;
691 if (allowance >= 0)
692 strcat(buf, buf0);
693 else {
694 allowance += s;
695 break;
696 }
697 }
698 return 4096 - allowance;
699 }
700
comm_mark_show(struct config_item * item,char * buf)701 static ssize_t comm_mark_show(struct config_item *item, char *buf)
702 {
703 return sprintf(buf, "%u\n", config_item_to_comm(item)->mark);
704 }
705
comm_mark_store(struct config_item * item,const char * buf,size_t len)706 static ssize_t comm_mark_store(struct config_item *item, const char *buf,
707 size_t len)
708 {
709 unsigned int mark;
710 int rc;
711
712 rc = kstrtouint(buf, 0, &mark);
713 if (rc)
714 return rc;
715
716 config_item_to_comm(item)->mark = mark;
717 return len;
718 }
719
720 CONFIGFS_ATTR(comm_, nodeid);
721 CONFIGFS_ATTR(comm_, local);
722 CONFIGFS_ATTR(comm_, mark);
723 CONFIGFS_ATTR_WO(comm_, addr);
724 CONFIGFS_ATTR_RO(comm_, addr_list);
725
726 static struct configfs_attribute *comm_attrs[] = {
727 [COMM_ATTR_NODEID] = &comm_attr_nodeid,
728 [COMM_ATTR_LOCAL] = &comm_attr_local,
729 [COMM_ATTR_ADDR] = &comm_attr_addr,
730 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
731 [COMM_ATTR_MARK] = &comm_attr_mark,
732 NULL,
733 };
734
node_nodeid_show(struct config_item * item,char * buf)735 static ssize_t node_nodeid_show(struct config_item *item, char *buf)
736 {
737 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid);
738 }
739
node_nodeid_store(struct config_item * item,const char * buf,size_t len)740 static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
741 size_t len)
742 {
743 struct dlm_node *nd = config_item_to_node(item);
744 uint32_t seq = 0;
745 int rc = kstrtoint(buf, 0, &nd->nodeid);
746
747 if (rc)
748 return rc;
749 dlm_comm_seq(nd->nodeid, &seq);
750 nd->comm_seq = seq;
751 return len;
752 }
753
node_weight_show(struct config_item * item,char * buf)754 static ssize_t node_weight_show(struct config_item *item, char *buf)
755 {
756 return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
757 }
758
node_weight_store(struct config_item * item,const char * buf,size_t len)759 static ssize_t node_weight_store(struct config_item *item, const char *buf,
760 size_t len)
761 {
762 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
763
764 if (rc)
765 return rc;
766 return len;
767 }
768
769 CONFIGFS_ATTR(node_, nodeid);
770 CONFIGFS_ATTR(node_, weight);
771
772 static struct configfs_attribute *node_attrs[] = {
773 [NODE_ATTR_NODEID] = &node_attr_nodeid,
774 [NODE_ATTR_WEIGHT] = &node_attr_weight,
775 NULL,
776 };
777
778 /*
779 * Functions for the dlm to get the info that's been configured
780 */
781
get_space(char * name)782 static struct dlm_space *get_space(char *name)
783 {
784 struct config_item *i;
785
786 if (!space_list)
787 return NULL;
788
789 mutex_lock(&space_list->cg_subsys->su_mutex);
790 i = config_group_find_item(space_list, name);
791 mutex_unlock(&space_list->cg_subsys->su_mutex);
792
793 return config_item_to_space(i);
794 }
795
put_space(struct dlm_space * sp)796 static void put_space(struct dlm_space *sp)
797 {
798 config_item_put(&sp->group.cg_item);
799 }
800
get_comm(int nodeid)801 static struct dlm_comm *get_comm(int nodeid)
802 {
803 struct config_item *i;
804 struct dlm_comm *cm = NULL;
805 int found = 0;
806
807 if (!comm_list)
808 return NULL;
809
810 mutex_lock(&clusters_root.subsys.su_mutex);
811
812 list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
813 cm = config_item_to_comm(i);
814
815 if (cm->nodeid != nodeid)
816 continue;
817 found = 1;
818 config_item_get(i);
819 break;
820 }
821 mutex_unlock(&clusters_root.subsys.su_mutex);
822
823 if (!found)
824 cm = NULL;
825 return cm;
826 }
827
put_comm(struct dlm_comm * cm)828 static void put_comm(struct dlm_comm *cm)
829 {
830 config_item_put(&cm->item);
831 }
832
833 /* caller must free mem */
dlm_config_nodes(char * lsname,struct dlm_config_node ** nodes_out,int * count_out)834 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
835 int *count_out)
836 {
837 struct dlm_space *sp;
838 struct dlm_node *nd;
839 struct dlm_config_node *nodes, *node;
840 int rv, count;
841
842 sp = get_space(lsname);
843 if (!sp)
844 return -EEXIST;
845
846 mutex_lock(&sp->members_lock);
847 if (!sp->members_count) {
848 rv = -EINVAL;
849 printk(KERN_ERR "dlm: zero members_count\n");
850 goto out;
851 }
852
853 count = sp->members_count;
854
855 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
856 if (!nodes) {
857 rv = -ENOMEM;
858 goto out;
859 }
860
861 node = nodes;
862 list_for_each_entry(nd, &sp->members, list) {
863 node->nodeid = nd->nodeid;
864 node->weight = nd->weight;
865 node->new = nd->new;
866 node->comm_seq = nd->comm_seq;
867 node++;
868
869 nd->new = 0;
870 }
871
872 *count_out = count;
873 *nodes_out = nodes;
874 rv = 0;
875 out:
876 mutex_unlock(&sp->members_lock);
877 put_space(sp);
878 return rv;
879 }
880
dlm_comm_seq(int nodeid,uint32_t * seq)881 int dlm_comm_seq(int nodeid, uint32_t *seq)
882 {
883 struct dlm_comm *cm = get_comm(nodeid);
884 if (!cm)
885 return -EEXIST;
886 *seq = cm->seq;
887 put_comm(cm);
888 return 0;
889 }
890
dlm_comm_mark(int nodeid,unsigned int * mark)891 void dlm_comm_mark(int nodeid, unsigned int *mark)
892 {
893 struct dlm_comm *cm;
894
895 cm = get_comm(nodeid);
896 if (!cm) {
897 *mark = dlm_config.ci_mark;
898 return;
899 }
900
901 if (cm->mark)
902 *mark = cm->mark;
903 else
904 *mark = dlm_config.ci_mark;
905
906 put_comm(cm);
907 }
908
dlm_our_nodeid(void)909 int dlm_our_nodeid(void)
910 {
911 return local_comm ? local_comm->nodeid : 0;
912 }
913
914 /* num 0 is first addr, num 1 is second addr */
dlm_our_addr(struct sockaddr_storage * addr,int num)915 int dlm_our_addr(struct sockaddr_storage *addr, int num)
916 {
917 if (!local_comm)
918 return -1;
919 if (num + 1 > local_comm->addr_count)
920 return -1;
921 memcpy(addr, local_comm->addr[num], sizeof(*addr));
922 return 0;
923 }
924
925 /* Config file defaults */
926 #define DEFAULT_TCP_PORT 21064
927 #define DEFAULT_RSBTBL_SIZE 1024
928 #define DEFAULT_RECOVER_TIMER 5
929 #define DEFAULT_TOSS_SECS 10
930 #define DEFAULT_SCAN_SECS 5
931 #define DEFAULT_LOG_DEBUG 0
932 #define DEFAULT_LOG_INFO 1
933 #define DEFAULT_PROTOCOL 0
934 #define DEFAULT_MARK 0
935 #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */
936 #define DEFAULT_WAITWARN_US 0
937 #define DEFAULT_NEW_RSB_COUNT 128
938 #define DEFAULT_RECOVER_CALLBACKS 0
939 #define DEFAULT_CLUSTER_NAME ""
940
941 struct dlm_config_info dlm_config = {
942 .ci_tcp_port = DEFAULT_TCP_PORT,
943 .ci_buffer_size = DEFAULT_BUFFER_SIZE,
944 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
945 .ci_recover_timer = DEFAULT_RECOVER_TIMER,
946 .ci_toss_secs = DEFAULT_TOSS_SECS,
947 .ci_scan_secs = DEFAULT_SCAN_SECS,
948 .ci_log_debug = DEFAULT_LOG_DEBUG,
949 .ci_log_info = DEFAULT_LOG_INFO,
950 .ci_protocol = DEFAULT_PROTOCOL,
951 .ci_mark = DEFAULT_MARK,
952 .ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
953 .ci_waitwarn_us = DEFAULT_WAITWARN_US,
954 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
955 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
956 .ci_cluster_name = DEFAULT_CLUSTER_NAME
957 };
958
959