blob: 8665c88e5af26c674bc9e066355193e99f5c7061 [file] [log] [blame]
David Teiglande7fd4172006-01-18 09:30:29 +00001/******************************************************************************
2*******************************************************************************
3**
4** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
5** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
6**
7** This copyrighted material is made available to anyone wishing to use,
8** modify, copy, or redistribute it subject to the terms and conditions
9** of the GNU General Public License v.2.
10**
11*******************************************************************************
12******************************************************************************/
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/configfs.h>
17#include <net/sock.h>
18
19#include "config.h"
David Teigland1c032c02006-04-28 10:50:41 -040020#include "lowcomms.h"
David Teiglande7fd4172006-01-18 09:30:29 +000021
22/*
23 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
24 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
25 * /config/dlm/<cluster>/comms/<comm>/nodeid
26 * /config/dlm/<cluster>/comms/<comm>/local
27 * /config/dlm/<cluster>/comms/<comm>/addr
28 * The <cluster> level is useless, but I haven't figured out how to avoid it.
29 */
30
31static struct config_group *space_list;
32static struct config_group *comm_list;
33static struct comm *local_comm;
34
35struct clusters;
36struct cluster;
37struct spaces;
38struct space;
39struct comms;
40struct comm;
41struct nodes;
42struct node;
43
44static struct config_group *make_cluster(struct config_group *, const char *);
45static void drop_cluster(struct config_group *, struct config_item *);
46static void release_cluster(struct config_item *);
47static struct config_group *make_space(struct config_group *, const char *);
48static void drop_space(struct config_group *, struct config_item *);
49static void release_space(struct config_item *);
50static struct config_item *make_comm(struct config_group *, const char *);
51static void drop_comm(struct config_group *, struct config_item *);
52static void release_comm(struct config_item *);
53static struct config_item *make_node(struct config_group *, const char *);
54static void drop_node(struct config_group *, struct config_item *);
55static void release_node(struct config_item *);
56
David Teiglandd2007782007-01-09 09:46:02 -060057static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
58 char *buf);
59static ssize_t store_cluster(struct config_item *i,
60 struct configfs_attribute *a,
61 const char *buf, size_t len);
David Teiglande7fd4172006-01-18 09:30:29 +000062static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
63 char *buf);
64static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
65 const char *buf, size_t len);
66static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
67 char *buf);
68static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
69 const char *buf, size_t len);
70
71static ssize_t comm_nodeid_read(struct comm *cm, char *buf);
72static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len);
73static ssize_t comm_local_read(struct comm *cm, char *buf);
74static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len);
75static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len);
76static ssize_t node_nodeid_read(struct node *nd, char *buf);
77static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len);
78static ssize_t node_weight_read(struct node *nd, char *buf);
79static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len);
80
David Teiglandd2007782007-01-09 09:46:02 -060081struct cluster {
82 struct config_group group;
83 unsigned int cl_tcp_port;
84 unsigned int cl_buffer_size;
85 unsigned int cl_rsbtbl_size;
86 unsigned int cl_lkbtbl_size;
87 unsigned int cl_dirtbl_size;
88 unsigned int cl_recover_timer;
89 unsigned int cl_toss_secs;
90 unsigned int cl_scan_secs;
91 unsigned int cl_log_debug;
92};
93
94enum {
95 CLUSTER_ATTR_TCP_PORT = 0,
96 CLUSTER_ATTR_BUFFER_SIZE,
97 CLUSTER_ATTR_RSBTBL_SIZE,
98 CLUSTER_ATTR_LKBTBL_SIZE,
99 CLUSTER_ATTR_DIRTBL_SIZE,
100 CLUSTER_ATTR_RECOVER_TIMER,
101 CLUSTER_ATTR_TOSS_SECS,
102 CLUSTER_ATTR_SCAN_SECS,
103 CLUSTER_ATTR_LOG_DEBUG,
104};
105
106struct cluster_attribute {
107 struct configfs_attribute attr;
108 ssize_t (*show)(struct cluster *, char *);
109 ssize_t (*store)(struct cluster *, const char *, size_t);
110};
111
112static ssize_t cluster_set(struct cluster *cl, unsigned int *cl_field,
113 unsigned int *info_field, int check_zero,
114 const char *buf, size_t len)
115{
116 unsigned int x;
117
118 if (!capable(CAP_SYS_ADMIN))
119 return -EACCES;
120
121 x = simple_strtoul(buf, NULL, 0);
122
123 if (check_zero && !x)
124 return -EINVAL;
125
126 *cl_field = x;
127 *info_field = x;
128
129 return len;
130}
131
132#define __CONFIGFS_ATTR(_name,_mode,_read,_write) { \
133 .attr = { .ca_name = __stringify(_name), \
134 .ca_mode = _mode, \
135 .ca_owner = THIS_MODULE }, \
136 .show = _read, \
137 .store = _write, \
138}
139
140#define CLUSTER_ATTR(name, check_zero) \
141static ssize_t name##_write(struct cluster *cl, const char *buf, size_t len) \
142{ \
143 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
144 check_zero, buf, len); \
145} \
146static ssize_t name##_read(struct cluster *cl, char *buf) \
147{ \
148 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
149} \
150static struct cluster_attribute cluster_attr_##name = \
151__CONFIGFS_ATTR(name, 0644, name##_read, name##_write)
152
153CLUSTER_ATTR(tcp_port, 1);
154CLUSTER_ATTR(buffer_size, 1);
155CLUSTER_ATTR(rsbtbl_size, 1);
156CLUSTER_ATTR(lkbtbl_size, 1);
157CLUSTER_ATTR(dirtbl_size, 1);
158CLUSTER_ATTR(recover_timer, 1);
159CLUSTER_ATTR(toss_secs, 1);
160CLUSTER_ATTR(scan_secs, 1);
161CLUSTER_ATTR(log_debug, 0);
162
163static struct configfs_attribute *cluster_attrs[] = {
164 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr,
165 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr,
166 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr,
167 [CLUSTER_ATTR_LKBTBL_SIZE] = &cluster_attr_lkbtbl_size.attr,
168 [CLUSTER_ATTR_DIRTBL_SIZE] = &cluster_attr_dirtbl_size.attr,
169 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr,
170 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr,
171 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr,
172 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr,
173 NULL,
174};
175
David Teiglande7fd4172006-01-18 09:30:29 +0000176enum {
177 COMM_ATTR_NODEID = 0,
178 COMM_ATTR_LOCAL,
179 COMM_ATTR_ADDR,
180};
181
182struct comm_attribute {
183 struct configfs_attribute attr;
184 ssize_t (*show)(struct comm *, char *);
185 ssize_t (*store)(struct comm *, const char *, size_t);
186};
187
188static struct comm_attribute comm_attr_nodeid = {
189 .attr = { .ca_owner = THIS_MODULE,
190 .ca_name = "nodeid",
191 .ca_mode = S_IRUGO | S_IWUSR },
192 .show = comm_nodeid_read,
193 .store = comm_nodeid_write,
194};
195
196static struct comm_attribute comm_attr_local = {
197 .attr = { .ca_owner = THIS_MODULE,
198 .ca_name = "local",
199 .ca_mode = S_IRUGO | S_IWUSR },
200 .show = comm_local_read,
201 .store = comm_local_write,
202};
203
204static struct comm_attribute comm_attr_addr = {
205 .attr = { .ca_owner = THIS_MODULE,
206 .ca_name = "addr",
207 .ca_mode = S_IRUGO | S_IWUSR },
208 .store = comm_addr_write,
209};
210
211static struct configfs_attribute *comm_attrs[] = {
212 [COMM_ATTR_NODEID] = &comm_attr_nodeid.attr,
213 [COMM_ATTR_LOCAL] = &comm_attr_local.attr,
214 [COMM_ATTR_ADDR] = &comm_attr_addr.attr,
215 NULL,
216};
217
218enum {
219 NODE_ATTR_NODEID = 0,
220 NODE_ATTR_WEIGHT,
221};
222
223struct node_attribute {
224 struct configfs_attribute attr;
225 ssize_t (*show)(struct node *, char *);
226 ssize_t (*store)(struct node *, const char *, size_t);
227};
228
229static struct node_attribute node_attr_nodeid = {
230 .attr = { .ca_owner = THIS_MODULE,
231 .ca_name = "nodeid",
232 .ca_mode = S_IRUGO | S_IWUSR },
233 .show = node_nodeid_read,
234 .store = node_nodeid_write,
235};
236
237static struct node_attribute node_attr_weight = {
238 .attr = { .ca_owner = THIS_MODULE,
239 .ca_name = "weight",
240 .ca_mode = S_IRUGO | S_IWUSR },
241 .show = node_weight_read,
242 .store = node_weight_write,
243};
244
245static struct configfs_attribute *node_attrs[] = {
246 [NODE_ATTR_NODEID] = &node_attr_nodeid.attr,
247 [NODE_ATTR_WEIGHT] = &node_attr_weight.attr,
248 NULL,
249};
250
251struct clusters {
252 struct configfs_subsystem subsys;
253};
254
David Teiglande7fd4172006-01-18 09:30:29 +0000255struct spaces {
256 struct config_group ss_group;
257};
258
259struct space {
260 struct config_group group;
261 struct list_head members;
David Teigland90135922006-01-20 08:47:07 +0000262 struct mutex members_lock;
David Teiglande7fd4172006-01-18 09:30:29 +0000263 int members_count;
264};
265
266struct comms {
267 struct config_group cs_group;
268};
269
270struct comm {
271 struct config_item item;
272 int nodeid;
273 int local;
274 int addr_count;
275 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
276};
277
278struct nodes {
279 struct config_group ns_group;
280};
281
282struct node {
283 struct config_item item;
284 struct list_head list; /* space->members */
285 int nodeid;
286 int weight;
287};
288
289static struct configfs_group_operations clusters_ops = {
290 .make_group = make_cluster,
291 .drop_item = drop_cluster,
292};
293
294static struct configfs_item_operations cluster_ops = {
295 .release = release_cluster,
David Teiglandd2007782007-01-09 09:46:02 -0600296 .show_attribute = show_cluster,
297 .store_attribute = store_cluster,
David Teiglande7fd4172006-01-18 09:30:29 +0000298};
299
300static struct configfs_group_operations spaces_ops = {
301 .make_group = make_space,
302 .drop_item = drop_space,
303};
304
305static struct configfs_item_operations space_ops = {
306 .release = release_space,
307};
308
309static struct configfs_group_operations comms_ops = {
310 .make_item = make_comm,
311 .drop_item = drop_comm,
312};
313
314static struct configfs_item_operations comm_ops = {
315 .release = release_comm,
316 .show_attribute = show_comm,
317 .store_attribute = store_comm,
318};
319
320static struct configfs_group_operations nodes_ops = {
321 .make_item = make_node,
322 .drop_item = drop_node,
323};
324
325static struct configfs_item_operations node_ops = {
326 .release = release_node,
327 .show_attribute = show_node,
328 .store_attribute = store_node,
329};
330
331static struct config_item_type clusters_type = {
332 .ct_group_ops = &clusters_ops,
333 .ct_owner = THIS_MODULE,
334};
335
336static struct config_item_type cluster_type = {
337 .ct_item_ops = &cluster_ops,
David Teiglandd2007782007-01-09 09:46:02 -0600338 .ct_attrs = cluster_attrs,
David Teiglande7fd4172006-01-18 09:30:29 +0000339 .ct_owner = THIS_MODULE,
340};
341
342static struct config_item_type spaces_type = {
343 .ct_group_ops = &spaces_ops,
344 .ct_owner = THIS_MODULE,
345};
346
347static struct config_item_type space_type = {
348 .ct_item_ops = &space_ops,
349 .ct_owner = THIS_MODULE,
350};
351
352static struct config_item_type comms_type = {
353 .ct_group_ops = &comms_ops,
354 .ct_owner = THIS_MODULE,
355};
356
357static struct config_item_type comm_type = {
358 .ct_item_ops = &comm_ops,
359 .ct_attrs = comm_attrs,
360 .ct_owner = THIS_MODULE,
361};
362
363static struct config_item_type nodes_type = {
364 .ct_group_ops = &nodes_ops,
365 .ct_owner = THIS_MODULE,
366};
367
368static struct config_item_type node_type = {
369 .ct_item_ops = &node_ops,
370 .ct_attrs = node_attrs,
371 .ct_owner = THIS_MODULE,
372};
373
374static struct cluster *to_cluster(struct config_item *i)
375{
376 return i ? container_of(to_config_group(i), struct cluster, group):NULL;
377}
378
379static struct space *to_space(struct config_item *i)
380{
381 return i ? container_of(to_config_group(i), struct space, group) : NULL;
382}
383
384static struct comm *to_comm(struct config_item *i)
385{
386 return i ? container_of(i, struct comm, item) : NULL;
387}
388
389static struct node *to_node(struct config_item *i)
390{
391 return i ? container_of(i, struct node, item) : NULL;
392}
393
394static struct config_group *make_cluster(struct config_group *g,
395 const char *name)
396{
397 struct cluster *cl = NULL;
398 struct spaces *sps = NULL;
399 struct comms *cms = NULL;
400 void *gps = NULL;
401
402 cl = kzalloc(sizeof(struct cluster), GFP_KERNEL);
403 gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
404 sps = kzalloc(sizeof(struct spaces), GFP_KERNEL);
405 cms = kzalloc(sizeof(struct comms), GFP_KERNEL);
406
407 if (!cl || !gps || !sps || !cms)
408 goto fail;
409
410 config_group_init_type_name(&cl->group, name, &cluster_type);
411 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
412 config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
413
414 cl->group.default_groups = gps;
415 cl->group.default_groups[0] = &sps->ss_group;
416 cl->group.default_groups[1] = &cms->cs_group;
417 cl->group.default_groups[2] = NULL;
418
David Teiglandd2007782007-01-09 09:46:02 -0600419 cl->cl_tcp_port = dlm_config.ci_tcp_port;
420 cl->cl_buffer_size = dlm_config.ci_buffer_size;
421 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
422 cl->cl_lkbtbl_size = dlm_config.ci_lkbtbl_size;
423 cl->cl_dirtbl_size = dlm_config.ci_dirtbl_size;
424 cl->cl_recover_timer = dlm_config.ci_recover_timer;
425 cl->cl_toss_secs = dlm_config.ci_toss_secs;
426 cl->cl_scan_secs = dlm_config.ci_scan_secs;
427 cl->cl_log_debug = dlm_config.ci_log_debug;
428
David Teiglande7fd4172006-01-18 09:30:29 +0000429 space_list = &sps->ss_group;
430 comm_list = &cms->cs_group;
431 return &cl->group;
432
433 fail:
434 kfree(cl);
435 kfree(gps);
436 kfree(sps);
437 kfree(cms);
438 return NULL;
439}
440
441static void drop_cluster(struct config_group *g, struct config_item *i)
442{
443 struct cluster *cl = to_cluster(i);
444 struct config_item *tmp;
445 int j;
446
447 for (j = 0; cl->group.default_groups[j]; j++) {
448 tmp = &cl->group.default_groups[j]->cg_item;
449 cl->group.default_groups[j] = NULL;
450 config_item_put(tmp);
451 }
452
453 space_list = NULL;
454 comm_list = NULL;
455
456 config_item_put(i);
457}
458
459static void release_cluster(struct config_item *i)
460{
461 struct cluster *cl = to_cluster(i);
462 kfree(cl->group.default_groups);
463 kfree(cl);
464}
465
466static struct config_group *make_space(struct config_group *g, const char *name)
467{
468 struct space *sp = NULL;
469 struct nodes *nds = NULL;
470 void *gps = NULL;
471
472 sp = kzalloc(sizeof(struct space), GFP_KERNEL);
473 gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL);
474 nds = kzalloc(sizeof(struct nodes), GFP_KERNEL);
475
476 if (!sp || !gps || !nds)
477 goto fail;
478
479 config_group_init_type_name(&sp->group, name, &space_type);
480 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
481
482 sp->group.default_groups = gps;
483 sp->group.default_groups[0] = &nds->ns_group;
484 sp->group.default_groups[1] = NULL;
485
486 INIT_LIST_HEAD(&sp->members);
David Teigland90135922006-01-20 08:47:07 +0000487 mutex_init(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000488 sp->members_count = 0;
489 return &sp->group;
490
491 fail:
492 kfree(sp);
493 kfree(gps);
494 kfree(nds);
495 return NULL;
496}
497
498static void drop_space(struct config_group *g, struct config_item *i)
499{
500 struct space *sp = to_space(i);
501 struct config_item *tmp;
502 int j;
503
504 /* assert list_empty(&sp->members) */
505
506 for (j = 0; sp->group.default_groups[j]; j++) {
507 tmp = &sp->group.default_groups[j]->cg_item;
508 sp->group.default_groups[j] = NULL;
509 config_item_put(tmp);
510 }
511
512 config_item_put(i);
513}
514
515static void release_space(struct config_item *i)
516{
517 struct space *sp = to_space(i);
518 kfree(sp->group.default_groups);
519 kfree(sp);
520}
521
522static struct config_item *make_comm(struct config_group *g, const char *name)
523{
524 struct comm *cm;
525
526 cm = kzalloc(sizeof(struct comm), GFP_KERNEL);
527 if (!cm)
528 return NULL;
529
530 config_item_init_type_name(&cm->item, name, &comm_type);
531 cm->nodeid = -1;
532 cm->local = 0;
533 cm->addr_count = 0;
534 return &cm->item;
535}
536
537static void drop_comm(struct config_group *g, struct config_item *i)
538{
539 struct comm *cm = to_comm(i);
540 if (local_comm == cm)
541 local_comm = NULL;
David Teigland1c032c02006-04-28 10:50:41 -0400542 dlm_lowcomms_close(cm->nodeid);
David Teiglande7fd4172006-01-18 09:30:29 +0000543 while (cm->addr_count--)
544 kfree(cm->addr[cm->addr_count]);
545 config_item_put(i);
546}
547
548static void release_comm(struct config_item *i)
549{
550 struct comm *cm = to_comm(i);
551 kfree(cm);
552}
553
554static struct config_item *make_node(struct config_group *g, const char *name)
555{
556 struct space *sp = to_space(g->cg_item.ci_parent);
557 struct node *nd;
558
559 nd = kzalloc(sizeof(struct node), GFP_KERNEL);
560 if (!nd)
561 return NULL;
562
563 config_item_init_type_name(&nd->item, name, &node_type);
564 nd->nodeid = -1;
565 nd->weight = 1; /* default weight of 1 if none is set */
566
David Teigland90135922006-01-20 08:47:07 +0000567 mutex_lock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000568 list_add(&nd->list, &sp->members);
569 sp->members_count++;
David Teigland90135922006-01-20 08:47:07 +0000570 mutex_unlock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000571
572 return &nd->item;
573}
574
575static void drop_node(struct config_group *g, struct config_item *i)
576{
577 struct space *sp = to_space(g->cg_item.ci_parent);
578 struct node *nd = to_node(i);
579
David Teigland90135922006-01-20 08:47:07 +0000580 mutex_lock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000581 list_del(&nd->list);
582 sp->members_count--;
David Teigland90135922006-01-20 08:47:07 +0000583 mutex_unlock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000584
585 config_item_put(i);
586}
587
588static void release_node(struct config_item *i)
589{
590 struct node *nd = to_node(i);
591 kfree(nd);
592}
593
594static struct clusters clusters_root = {
595 .subsys = {
596 .su_group = {
597 .cg_item = {
598 .ci_namebuf = "dlm",
599 .ci_type = &clusters_type,
600 },
601 },
602 },
603};
604
605int dlm_config_init(void)
606{
607 config_group_init(&clusters_root.subsys.su_group);
608 init_MUTEX(&clusters_root.subsys.su_sem);
609 return configfs_register_subsystem(&clusters_root.subsys);
610}
611
612void dlm_config_exit(void)
613{
614 configfs_unregister_subsystem(&clusters_root.subsys);
615}
616
617/*
618 * Functions for user space to read/write attributes
619 */
620
David Teiglandd2007782007-01-09 09:46:02 -0600621static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
622 char *buf)
623{
624 struct cluster *cl = to_cluster(i);
625 struct cluster_attribute *cla =
626 container_of(a, struct cluster_attribute, attr);
627 return cla->show ? cla->show(cl, buf) : 0;
628}
629
630static ssize_t store_cluster(struct config_item *i,
631 struct configfs_attribute *a,
632 const char *buf, size_t len)
633{
634 struct cluster *cl = to_cluster(i);
635 struct cluster_attribute *cla =
636 container_of(a, struct cluster_attribute, attr);
637 return cla->store ? cla->store(cl, buf, len) : -EINVAL;
638}
639
David Teiglande7fd4172006-01-18 09:30:29 +0000640static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
641 char *buf)
642{
643 struct comm *cm = to_comm(i);
644 struct comm_attribute *cma =
645 container_of(a, struct comm_attribute, attr);
646 return cma->show ? cma->show(cm, buf) : 0;
647}
648
649static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
650 const char *buf, size_t len)
651{
652 struct comm *cm = to_comm(i);
653 struct comm_attribute *cma =
654 container_of(a, struct comm_attribute, attr);
655 return cma->store ? cma->store(cm, buf, len) : -EINVAL;
656}
657
658static ssize_t comm_nodeid_read(struct comm *cm, char *buf)
659{
660 return sprintf(buf, "%d\n", cm->nodeid);
661}
662
663static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len)
664{
665 cm->nodeid = simple_strtol(buf, NULL, 0);
666 return len;
667}
668
669static ssize_t comm_local_read(struct comm *cm, char *buf)
670{
671 return sprintf(buf, "%d\n", cm->local);
672}
673
674static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len)
675{
676 cm->local= simple_strtol(buf, NULL, 0);
677 if (cm->local && !local_comm)
678 local_comm = cm;
679 return len;
680}
681
682static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len)
683{
684 struct sockaddr_storage *addr;
685
686 if (len != sizeof(struct sockaddr_storage))
687 return -EINVAL;
688
689 if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
690 return -ENOSPC;
691
692 addr = kzalloc(sizeof(*addr), GFP_KERNEL);
693 if (!addr)
694 return -ENOMEM;
695
696 memcpy(addr, buf, len);
697 cm->addr[cm->addr_count++] = addr;
698 return len;
699}
700
701static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
702 char *buf)
703{
704 struct node *nd = to_node(i);
705 struct node_attribute *nda =
706 container_of(a, struct node_attribute, attr);
707 return nda->show ? nda->show(nd, buf) : 0;
708}
709
710static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
711 const char *buf, size_t len)
712{
713 struct node *nd = to_node(i);
714 struct node_attribute *nda =
715 container_of(a, struct node_attribute, attr);
716 return nda->store ? nda->store(nd, buf, len) : -EINVAL;
717}
718
719static ssize_t node_nodeid_read(struct node *nd, char *buf)
720{
721 return sprintf(buf, "%d\n", nd->nodeid);
722}
723
724static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len)
725{
726 nd->nodeid = simple_strtol(buf, NULL, 0);
727 return len;
728}
729
730static ssize_t node_weight_read(struct node *nd, char *buf)
731{
732 return sprintf(buf, "%d\n", nd->weight);
733}
734
735static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len)
736{
737 nd->weight = simple_strtol(buf, NULL, 0);
738 return len;
739}
740
741/*
742 * Functions for the dlm to get the info that's been configured
743 */
744
745static struct space *get_space(char *name)
746{
747 if (!space_list)
748 return NULL;
749 return to_space(config_group_find_obj(space_list, name));
750}
751
752static void put_space(struct space *sp)
753{
754 config_item_put(&sp->group.cg_item);
755}
756
757static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr)
758{
759 struct config_item *i;
760 struct comm *cm = NULL;
761 int found = 0;
762
763 if (!comm_list)
764 return NULL;
765
766 down(&clusters_root.subsys.su_sem);
767
768 list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
769 cm = to_comm(i);
770
771 if (nodeid) {
772 if (cm->nodeid != nodeid)
773 continue;
774 found = 1;
775 break;
776 } else {
777 if (!cm->addr_count ||
778 memcmp(cm->addr[0], addr, sizeof(*addr)))
779 continue;
780 found = 1;
781 break;
782 }
783 }
784 up(&clusters_root.subsys.su_sem);
785
786 if (found)
787 config_item_get(i);
788 else
789 cm = NULL;
790 return cm;
791}
792
793static void put_comm(struct comm *cm)
794{
795 config_item_put(&cm->item);
796}
797
798/* caller must free mem */
799int dlm_nodeid_list(char *lsname, int **ids_out)
800{
801 struct space *sp;
802 struct node *nd;
803 int i = 0, rv = 0;
804 int *ids;
805
806 sp = get_space(lsname);
807 if (!sp)
808 return -EEXIST;
809
David Teigland90135922006-01-20 08:47:07 +0000810 mutex_lock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000811 if (!sp->members_count) {
812 rv = 0;
813 goto out;
814 }
815
816 ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL);
817 if (!ids) {
818 rv = -ENOMEM;
819 goto out;
820 }
821
822 rv = sp->members_count;
823 list_for_each_entry(nd, &sp->members, list)
824 ids[i++] = nd->nodeid;
825
826 if (rv != i)
827 printk("bad nodeid count %d %d\n", rv, i);
828
829 *ids_out = ids;
830 out:
David Teigland90135922006-01-20 08:47:07 +0000831 mutex_unlock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000832 put_space(sp);
833 return rv;
834}
835
836int dlm_node_weight(char *lsname, int nodeid)
837{
838 struct space *sp;
839 struct node *nd;
840 int w = -EEXIST;
841
842 sp = get_space(lsname);
843 if (!sp)
844 goto out;
845
David Teigland90135922006-01-20 08:47:07 +0000846 mutex_lock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000847 list_for_each_entry(nd, &sp->members, list) {
848 if (nd->nodeid != nodeid)
849 continue;
850 w = nd->weight;
851 break;
852 }
David Teigland90135922006-01-20 08:47:07 +0000853 mutex_unlock(&sp->members_lock);
David Teiglande7fd4172006-01-18 09:30:29 +0000854 put_space(sp);
855 out:
856 return w;
857}
858
859int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr)
860{
861 struct comm *cm = get_comm(nodeid, NULL);
862 if (!cm)
863 return -EEXIST;
864 if (!cm->addr_count)
865 return -ENOENT;
866 memcpy(addr, cm->addr[0], sizeof(*addr));
867 put_comm(cm);
868 return 0;
869}
870
871int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid)
872{
873 struct comm *cm = get_comm(0, addr);
874 if (!cm)
875 return -EEXIST;
876 *nodeid = cm->nodeid;
877 put_comm(cm);
878 return 0;
879}
880
881int dlm_our_nodeid(void)
882{
883 return local_comm ? local_comm->nodeid : 0;
884}
885
886/* num 0 is first addr, num 1 is second addr */
887int dlm_our_addr(struct sockaddr_storage *addr, int num)
888{
889 if (!local_comm)
890 return -1;
891 if (num + 1 > local_comm->addr_count)
892 return -1;
893 memcpy(addr, local_comm->addr[num], sizeof(*addr));
894 return 0;
895}
896
897/* Config file defaults */
898#define DEFAULT_TCP_PORT 21064
899#define DEFAULT_BUFFER_SIZE 4096
900#define DEFAULT_RSBTBL_SIZE 256
901#define DEFAULT_LKBTBL_SIZE 1024
902#define DEFAULT_DIRTBL_SIZE 512
903#define DEFAULT_RECOVER_TIMER 5
904#define DEFAULT_TOSS_SECS 10
905#define DEFAULT_SCAN_SECS 5
David Teigland99fc6482007-01-09 09:44:01 -0600906#define DEFAULT_LOG_DEBUG 0
David Teiglande7fd4172006-01-18 09:30:29 +0000907
908struct dlm_config_info dlm_config = {
David Teigland68c817a2007-01-09 09:41:48 -0600909 .ci_tcp_port = DEFAULT_TCP_PORT,
910 .ci_buffer_size = DEFAULT_BUFFER_SIZE,
911 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
912 .ci_lkbtbl_size = DEFAULT_LKBTBL_SIZE,
913 .ci_dirtbl_size = DEFAULT_DIRTBL_SIZE,
914 .ci_recover_timer = DEFAULT_RECOVER_TIMER,
915 .ci_toss_secs = DEFAULT_TOSS_SECS,
David Teigland99fc6482007-01-09 09:44:01 -0600916 .ci_scan_secs = DEFAULT_SCAN_SECS,
917 .ci_log_debug = DEFAULT_LOG_DEBUG
David Teiglande7fd4172006-01-18 09:30:29 +0000918};
919