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1 | /****************************************************************************** |
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" | |
20 | ||
21 | /* | |
22 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid | |
23 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight | |
24 | * /config/dlm/<cluster>/comms/<comm>/nodeid | |
25 | * /config/dlm/<cluster>/comms/<comm>/local | |
26 | * /config/dlm/<cluster>/comms/<comm>/addr | |
27 | * The <cluster> level is useless, but I haven't figured out how to avoid it. | |
28 | */ | |
29 | ||
30 | static struct config_group *space_list; | |
31 | static struct config_group *comm_list; | |
32 | static struct comm *local_comm; | |
33 | ||
34 | struct clusters; | |
35 | struct cluster; | |
36 | struct spaces; | |
37 | struct space; | |
38 | struct comms; | |
39 | struct comm; | |
40 | struct nodes; | |
41 | struct node; | |
42 | ||
43 | static struct config_group *make_cluster(struct config_group *, const char *); | |
44 | static void drop_cluster(struct config_group *, struct config_item *); | |
45 | static void release_cluster(struct config_item *); | |
46 | static struct config_group *make_space(struct config_group *, const char *); | |
47 | static void drop_space(struct config_group *, struct config_item *); | |
48 | static void release_space(struct config_item *); | |
49 | static struct config_item *make_comm(struct config_group *, const char *); | |
50 | static void drop_comm(struct config_group *, struct config_item *); | |
51 | static void release_comm(struct config_item *); | |
52 | static struct config_item *make_node(struct config_group *, const char *); | |
53 | static void drop_node(struct config_group *, struct config_item *); | |
54 | static void release_node(struct config_item *); | |
55 | ||
56 | static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, | |
57 | char *buf); | |
58 | static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, | |
59 | const char *buf, size_t len); | |
60 | static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, | |
61 | char *buf); | |
62 | static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, | |
63 | const char *buf, size_t len); | |
64 | ||
65 | static ssize_t comm_nodeid_read(struct comm *cm, char *buf); | |
66 | static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len); | |
67 | static ssize_t comm_local_read(struct comm *cm, char *buf); | |
68 | static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len); | |
69 | static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len); | |
70 | static ssize_t node_nodeid_read(struct node *nd, char *buf); | |
71 | static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len); | |
72 | static ssize_t node_weight_read(struct node *nd, char *buf); | |
73 | static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len); | |
74 | ||
75 | enum { | |
76 | COMM_ATTR_NODEID = 0, | |
77 | COMM_ATTR_LOCAL, | |
78 | COMM_ATTR_ADDR, | |
79 | }; | |
80 | ||
81 | struct comm_attribute { | |
82 | struct configfs_attribute attr; | |
83 | ssize_t (*show)(struct comm *, char *); | |
84 | ssize_t (*store)(struct comm *, const char *, size_t); | |
85 | }; | |
86 | ||
87 | static struct comm_attribute comm_attr_nodeid = { | |
88 | .attr = { .ca_owner = THIS_MODULE, | |
89 | .ca_name = "nodeid", | |
90 | .ca_mode = S_IRUGO | S_IWUSR }, | |
91 | .show = comm_nodeid_read, | |
92 | .store = comm_nodeid_write, | |
93 | }; | |
94 | ||
95 | static struct comm_attribute comm_attr_local = { | |
96 | .attr = { .ca_owner = THIS_MODULE, | |
97 | .ca_name = "local", | |
98 | .ca_mode = S_IRUGO | S_IWUSR }, | |
99 | .show = comm_local_read, | |
100 | .store = comm_local_write, | |
101 | }; | |
102 | ||
103 | static struct comm_attribute comm_attr_addr = { | |
104 | .attr = { .ca_owner = THIS_MODULE, | |
105 | .ca_name = "addr", | |
106 | .ca_mode = S_IRUGO | S_IWUSR }, | |
107 | .store = comm_addr_write, | |
108 | }; | |
109 | ||
110 | static struct configfs_attribute *comm_attrs[] = { | |
111 | [COMM_ATTR_NODEID] = &comm_attr_nodeid.attr, | |
112 | [COMM_ATTR_LOCAL] = &comm_attr_local.attr, | |
113 | [COMM_ATTR_ADDR] = &comm_attr_addr.attr, | |
114 | NULL, | |
115 | }; | |
116 | ||
117 | enum { | |
118 | NODE_ATTR_NODEID = 0, | |
119 | NODE_ATTR_WEIGHT, | |
120 | }; | |
121 | ||
122 | struct node_attribute { | |
123 | struct configfs_attribute attr; | |
124 | ssize_t (*show)(struct node *, char *); | |
125 | ssize_t (*store)(struct node *, const char *, size_t); | |
126 | }; | |
127 | ||
128 | static struct node_attribute node_attr_nodeid = { | |
129 | .attr = { .ca_owner = THIS_MODULE, | |
130 | .ca_name = "nodeid", | |
131 | .ca_mode = S_IRUGO | S_IWUSR }, | |
132 | .show = node_nodeid_read, | |
133 | .store = node_nodeid_write, | |
134 | }; | |
135 | ||
136 | static struct node_attribute node_attr_weight = { | |
137 | .attr = { .ca_owner = THIS_MODULE, | |
138 | .ca_name = "weight", | |
139 | .ca_mode = S_IRUGO | S_IWUSR }, | |
140 | .show = node_weight_read, | |
141 | .store = node_weight_write, | |
142 | }; | |
143 | ||
144 | static struct configfs_attribute *node_attrs[] = { | |
145 | [NODE_ATTR_NODEID] = &node_attr_nodeid.attr, | |
146 | [NODE_ATTR_WEIGHT] = &node_attr_weight.attr, | |
147 | NULL, | |
148 | }; | |
149 | ||
150 | struct clusters { | |
151 | struct configfs_subsystem subsys; | |
152 | }; | |
153 | ||
154 | struct cluster { | |
155 | struct config_group group; | |
156 | }; | |
157 | ||
158 | struct spaces { | |
159 | struct config_group ss_group; | |
160 | }; | |
161 | ||
162 | struct space { | |
163 | struct config_group group; | |
164 | struct list_head members; | |
165 | struct semaphore members_lock; | |
166 | int members_count; | |
167 | }; | |
168 | ||
169 | struct comms { | |
170 | struct config_group cs_group; | |
171 | }; | |
172 | ||
173 | struct comm { | |
174 | struct config_item item; | |
175 | int nodeid; | |
176 | int local; | |
177 | int addr_count; | |
178 | struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; | |
179 | }; | |
180 | ||
181 | struct nodes { | |
182 | struct config_group ns_group; | |
183 | }; | |
184 | ||
185 | struct node { | |
186 | struct config_item item; | |
187 | struct list_head list; /* space->members */ | |
188 | int nodeid; | |
189 | int weight; | |
190 | }; | |
191 | ||
192 | static struct configfs_group_operations clusters_ops = { | |
193 | .make_group = make_cluster, | |
194 | .drop_item = drop_cluster, | |
195 | }; | |
196 | ||
197 | static struct configfs_item_operations cluster_ops = { | |
198 | .release = release_cluster, | |
199 | }; | |
200 | ||
201 | static struct configfs_group_operations spaces_ops = { | |
202 | .make_group = make_space, | |
203 | .drop_item = drop_space, | |
204 | }; | |
205 | ||
206 | static struct configfs_item_operations space_ops = { | |
207 | .release = release_space, | |
208 | }; | |
209 | ||
210 | static struct configfs_group_operations comms_ops = { | |
211 | .make_item = make_comm, | |
212 | .drop_item = drop_comm, | |
213 | }; | |
214 | ||
215 | static struct configfs_item_operations comm_ops = { | |
216 | .release = release_comm, | |
217 | .show_attribute = show_comm, | |
218 | .store_attribute = store_comm, | |
219 | }; | |
220 | ||
221 | static struct configfs_group_operations nodes_ops = { | |
222 | .make_item = make_node, | |
223 | .drop_item = drop_node, | |
224 | }; | |
225 | ||
226 | static struct configfs_item_operations node_ops = { | |
227 | .release = release_node, | |
228 | .show_attribute = show_node, | |
229 | .store_attribute = store_node, | |
230 | }; | |
231 | ||
232 | static struct config_item_type clusters_type = { | |
233 | .ct_group_ops = &clusters_ops, | |
234 | .ct_owner = THIS_MODULE, | |
235 | }; | |
236 | ||
237 | static struct config_item_type cluster_type = { | |
238 | .ct_item_ops = &cluster_ops, | |
239 | .ct_owner = THIS_MODULE, | |
240 | }; | |
241 | ||
242 | static struct config_item_type spaces_type = { | |
243 | .ct_group_ops = &spaces_ops, | |
244 | .ct_owner = THIS_MODULE, | |
245 | }; | |
246 | ||
247 | static struct config_item_type space_type = { | |
248 | .ct_item_ops = &space_ops, | |
249 | .ct_owner = THIS_MODULE, | |
250 | }; | |
251 | ||
252 | static struct config_item_type comms_type = { | |
253 | .ct_group_ops = &comms_ops, | |
254 | .ct_owner = THIS_MODULE, | |
255 | }; | |
256 | ||
257 | static struct config_item_type comm_type = { | |
258 | .ct_item_ops = &comm_ops, | |
259 | .ct_attrs = comm_attrs, | |
260 | .ct_owner = THIS_MODULE, | |
261 | }; | |
262 | ||
263 | static struct config_item_type nodes_type = { | |
264 | .ct_group_ops = &nodes_ops, | |
265 | .ct_owner = THIS_MODULE, | |
266 | }; | |
267 | ||
268 | static struct config_item_type node_type = { | |
269 | .ct_item_ops = &node_ops, | |
270 | .ct_attrs = node_attrs, | |
271 | .ct_owner = THIS_MODULE, | |
272 | }; | |
273 | ||
274 | static struct cluster *to_cluster(struct config_item *i) | |
275 | { | |
276 | return i ? container_of(to_config_group(i), struct cluster, group):NULL; | |
277 | } | |
278 | ||
279 | static struct space *to_space(struct config_item *i) | |
280 | { | |
281 | return i ? container_of(to_config_group(i), struct space, group) : NULL; | |
282 | } | |
283 | ||
284 | static struct comm *to_comm(struct config_item *i) | |
285 | { | |
286 | return i ? container_of(i, struct comm, item) : NULL; | |
287 | } | |
288 | ||
289 | static struct node *to_node(struct config_item *i) | |
290 | { | |
291 | return i ? container_of(i, struct node, item) : NULL; | |
292 | } | |
293 | ||
294 | static struct config_group *make_cluster(struct config_group *g, | |
295 | const char *name) | |
296 | { | |
297 | struct cluster *cl = NULL; | |
298 | struct spaces *sps = NULL; | |
299 | struct comms *cms = NULL; | |
300 | void *gps = NULL; | |
301 | ||
302 | cl = kzalloc(sizeof(struct cluster), GFP_KERNEL); | |
303 | gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); | |
304 | sps = kzalloc(sizeof(struct spaces), GFP_KERNEL); | |
305 | cms = kzalloc(sizeof(struct comms), GFP_KERNEL); | |
306 | ||
307 | if (!cl || !gps || !sps || !cms) | |
308 | goto fail; | |
309 | ||
310 | config_group_init_type_name(&cl->group, name, &cluster_type); | |
311 | config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); | |
312 | config_group_init_type_name(&cms->cs_group, "comms", &comms_type); | |
313 | ||
314 | cl->group.default_groups = gps; | |
315 | cl->group.default_groups[0] = &sps->ss_group; | |
316 | cl->group.default_groups[1] = &cms->cs_group; | |
317 | cl->group.default_groups[2] = NULL; | |
318 | ||
319 | space_list = &sps->ss_group; | |
320 | comm_list = &cms->cs_group; | |
321 | return &cl->group; | |
322 | ||
323 | fail: | |
324 | kfree(cl); | |
325 | kfree(gps); | |
326 | kfree(sps); | |
327 | kfree(cms); | |
328 | return NULL; | |
329 | } | |
330 | ||
331 | static void drop_cluster(struct config_group *g, struct config_item *i) | |
332 | { | |
333 | struct cluster *cl = to_cluster(i); | |
334 | struct config_item *tmp; | |
335 | int j; | |
336 | ||
337 | for (j = 0; cl->group.default_groups[j]; j++) { | |
338 | tmp = &cl->group.default_groups[j]->cg_item; | |
339 | cl->group.default_groups[j] = NULL; | |
340 | config_item_put(tmp); | |
341 | } | |
342 | ||
343 | space_list = NULL; | |
344 | comm_list = NULL; | |
345 | ||
346 | config_item_put(i); | |
347 | } | |
348 | ||
349 | static void release_cluster(struct config_item *i) | |
350 | { | |
351 | struct cluster *cl = to_cluster(i); | |
352 | kfree(cl->group.default_groups); | |
353 | kfree(cl); | |
354 | } | |
355 | ||
356 | static struct config_group *make_space(struct config_group *g, const char *name) | |
357 | { | |
358 | struct space *sp = NULL; | |
359 | struct nodes *nds = NULL; | |
360 | void *gps = NULL; | |
361 | ||
362 | sp = kzalloc(sizeof(struct space), GFP_KERNEL); | |
363 | gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL); | |
364 | nds = kzalloc(sizeof(struct nodes), GFP_KERNEL); | |
365 | ||
366 | if (!sp || !gps || !nds) | |
367 | goto fail; | |
368 | ||
369 | config_group_init_type_name(&sp->group, name, &space_type); | |
370 | config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); | |
371 | ||
372 | sp->group.default_groups = gps; | |
373 | sp->group.default_groups[0] = &nds->ns_group; | |
374 | sp->group.default_groups[1] = NULL; | |
375 | ||
376 | INIT_LIST_HEAD(&sp->members); | |
377 | init_MUTEX(&sp->members_lock); | |
378 | sp->members_count = 0; | |
379 | return &sp->group; | |
380 | ||
381 | fail: | |
382 | kfree(sp); | |
383 | kfree(gps); | |
384 | kfree(nds); | |
385 | return NULL; | |
386 | } | |
387 | ||
388 | static void drop_space(struct config_group *g, struct config_item *i) | |
389 | { | |
390 | struct space *sp = to_space(i); | |
391 | struct config_item *tmp; | |
392 | int j; | |
393 | ||
394 | /* assert list_empty(&sp->members) */ | |
395 | ||
396 | for (j = 0; sp->group.default_groups[j]; j++) { | |
397 | tmp = &sp->group.default_groups[j]->cg_item; | |
398 | sp->group.default_groups[j] = NULL; | |
399 | config_item_put(tmp); | |
400 | } | |
401 | ||
402 | config_item_put(i); | |
403 | } | |
404 | ||
405 | static void release_space(struct config_item *i) | |
406 | { | |
407 | struct space *sp = to_space(i); | |
408 | kfree(sp->group.default_groups); | |
409 | kfree(sp); | |
410 | } | |
411 | ||
412 | static struct config_item *make_comm(struct config_group *g, const char *name) | |
413 | { | |
414 | struct comm *cm; | |
415 | ||
416 | cm = kzalloc(sizeof(struct comm), GFP_KERNEL); | |
417 | if (!cm) | |
418 | return NULL; | |
419 | ||
420 | config_item_init_type_name(&cm->item, name, &comm_type); | |
421 | cm->nodeid = -1; | |
422 | cm->local = 0; | |
423 | cm->addr_count = 0; | |
424 | return &cm->item; | |
425 | } | |
426 | ||
427 | static void drop_comm(struct config_group *g, struct config_item *i) | |
428 | { | |
429 | struct comm *cm = to_comm(i); | |
430 | if (local_comm == cm) | |
431 | local_comm = NULL; | |
432 | while (cm->addr_count--) | |
433 | kfree(cm->addr[cm->addr_count]); | |
434 | config_item_put(i); | |
435 | } | |
436 | ||
437 | static void release_comm(struct config_item *i) | |
438 | { | |
439 | struct comm *cm = to_comm(i); | |
440 | kfree(cm); | |
441 | } | |
442 | ||
443 | static struct config_item *make_node(struct config_group *g, const char *name) | |
444 | { | |
445 | struct space *sp = to_space(g->cg_item.ci_parent); | |
446 | struct node *nd; | |
447 | ||
448 | nd = kzalloc(sizeof(struct node), GFP_KERNEL); | |
449 | if (!nd) | |
450 | return NULL; | |
451 | ||
452 | config_item_init_type_name(&nd->item, name, &node_type); | |
453 | nd->nodeid = -1; | |
454 | nd->weight = 1; /* default weight of 1 if none is set */ | |
455 | ||
456 | down(&sp->members_lock); | |
457 | list_add(&nd->list, &sp->members); | |
458 | sp->members_count++; | |
459 | up(&sp->members_lock); | |
460 | ||
461 | return &nd->item; | |
462 | } | |
463 | ||
464 | static void drop_node(struct config_group *g, struct config_item *i) | |
465 | { | |
466 | struct space *sp = to_space(g->cg_item.ci_parent); | |
467 | struct node *nd = to_node(i); | |
468 | ||
469 | down(&sp->members_lock); | |
470 | list_del(&nd->list); | |
471 | sp->members_count--; | |
472 | up(&sp->members_lock); | |
473 | ||
474 | config_item_put(i); | |
475 | } | |
476 | ||
477 | static void release_node(struct config_item *i) | |
478 | { | |
479 | struct node *nd = to_node(i); | |
480 | kfree(nd); | |
481 | } | |
482 | ||
483 | static struct clusters clusters_root = { | |
484 | .subsys = { | |
485 | .su_group = { | |
486 | .cg_item = { | |
487 | .ci_namebuf = "dlm", | |
488 | .ci_type = &clusters_type, | |
489 | }, | |
490 | }, | |
491 | }, | |
492 | }; | |
493 | ||
494 | int dlm_config_init(void) | |
495 | { | |
496 | config_group_init(&clusters_root.subsys.su_group); | |
497 | init_MUTEX(&clusters_root.subsys.su_sem); | |
498 | return configfs_register_subsystem(&clusters_root.subsys); | |
499 | } | |
500 | ||
501 | void dlm_config_exit(void) | |
502 | { | |
503 | configfs_unregister_subsystem(&clusters_root.subsys); | |
504 | } | |
505 | ||
506 | /* | |
507 | * Functions for user space to read/write attributes | |
508 | */ | |
509 | ||
510 | static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, | |
511 | char *buf) | |
512 | { | |
513 | struct comm *cm = to_comm(i); | |
514 | struct comm_attribute *cma = | |
515 | container_of(a, struct comm_attribute, attr); | |
516 | return cma->show ? cma->show(cm, buf) : 0; | |
517 | } | |
518 | ||
519 | static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, | |
520 | const char *buf, size_t len) | |
521 | { | |
522 | struct comm *cm = to_comm(i); | |
523 | struct comm_attribute *cma = | |
524 | container_of(a, struct comm_attribute, attr); | |
525 | return cma->store ? cma->store(cm, buf, len) : -EINVAL; | |
526 | } | |
527 | ||
528 | static ssize_t comm_nodeid_read(struct comm *cm, char *buf) | |
529 | { | |
530 | return sprintf(buf, "%d\n", cm->nodeid); | |
531 | } | |
532 | ||
533 | static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len) | |
534 | { | |
535 | cm->nodeid = simple_strtol(buf, NULL, 0); | |
536 | return len; | |
537 | } | |
538 | ||
539 | static ssize_t comm_local_read(struct comm *cm, char *buf) | |
540 | { | |
541 | return sprintf(buf, "%d\n", cm->local); | |
542 | } | |
543 | ||
544 | static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len) | |
545 | { | |
546 | cm->local= simple_strtol(buf, NULL, 0); | |
547 | if (cm->local && !local_comm) | |
548 | local_comm = cm; | |
549 | return len; | |
550 | } | |
551 | ||
552 | static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len) | |
553 | { | |
554 | struct sockaddr_storage *addr; | |
555 | ||
556 | if (len != sizeof(struct sockaddr_storage)) | |
557 | return -EINVAL; | |
558 | ||
559 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) | |
560 | return -ENOSPC; | |
561 | ||
562 | addr = kzalloc(sizeof(*addr), GFP_KERNEL); | |
563 | if (!addr) | |
564 | return -ENOMEM; | |
565 | ||
566 | memcpy(addr, buf, len); | |
567 | cm->addr[cm->addr_count++] = addr; | |
568 | return len; | |
569 | } | |
570 | ||
571 | static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, | |
572 | char *buf) | |
573 | { | |
574 | struct node *nd = to_node(i); | |
575 | struct node_attribute *nda = | |
576 | container_of(a, struct node_attribute, attr); | |
577 | return nda->show ? nda->show(nd, buf) : 0; | |
578 | } | |
579 | ||
580 | static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, | |
581 | const char *buf, size_t len) | |
582 | { | |
583 | struct node *nd = to_node(i); | |
584 | struct node_attribute *nda = | |
585 | container_of(a, struct node_attribute, attr); | |
586 | return nda->store ? nda->store(nd, buf, len) : -EINVAL; | |
587 | } | |
588 | ||
589 | static ssize_t node_nodeid_read(struct node *nd, char *buf) | |
590 | { | |
591 | return sprintf(buf, "%d\n", nd->nodeid); | |
592 | } | |
593 | ||
594 | static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len) | |
595 | { | |
596 | nd->nodeid = simple_strtol(buf, NULL, 0); | |
597 | return len; | |
598 | } | |
599 | ||
600 | static ssize_t node_weight_read(struct node *nd, char *buf) | |
601 | { | |
602 | return sprintf(buf, "%d\n", nd->weight); | |
603 | } | |
604 | ||
605 | static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len) | |
606 | { | |
607 | nd->weight = simple_strtol(buf, NULL, 0); | |
608 | return len; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Functions for the dlm to get the info that's been configured | |
613 | */ | |
614 | ||
615 | static struct space *get_space(char *name) | |
616 | { | |
617 | if (!space_list) | |
618 | return NULL; | |
619 | return to_space(config_group_find_obj(space_list, name)); | |
620 | } | |
621 | ||
622 | static void put_space(struct space *sp) | |
623 | { | |
624 | config_item_put(&sp->group.cg_item); | |
625 | } | |
626 | ||
627 | static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr) | |
628 | { | |
629 | struct config_item *i; | |
630 | struct comm *cm = NULL; | |
631 | int found = 0; | |
632 | ||
633 | if (!comm_list) | |
634 | return NULL; | |
635 | ||
636 | down(&clusters_root.subsys.su_sem); | |
637 | ||
638 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { | |
639 | cm = to_comm(i); | |
640 | ||
641 | if (nodeid) { | |
642 | if (cm->nodeid != nodeid) | |
643 | continue; | |
644 | found = 1; | |
645 | break; | |
646 | } else { | |
647 | if (!cm->addr_count || | |
648 | memcmp(cm->addr[0], addr, sizeof(*addr))) | |
649 | continue; | |
650 | found = 1; | |
651 | break; | |
652 | } | |
653 | } | |
654 | up(&clusters_root.subsys.su_sem); | |
655 | ||
656 | if (found) | |
657 | config_item_get(i); | |
658 | else | |
659 | cm = NULL; | |
660 | return cm; | |
661 | } | |
662 | ||
663 | static void put_comm(struct comm *cm) | |
664 | { | |
665 | config_item_put(&cm->item); | |
666 | } | |
667 | ||
668 | /* caller must free mem */ | |
669 | int dlm_nodeid_list(char *lsname, int **ids_out) | |
670 | { | |
671 | struct space *sp; | |
672 | struct node *nd; | |
673 | int i = 0, rv = 0; | |
674 | int *ids; | |
675 | ||
676 | sp = get_space(lsname); | |
677 | if (!sp) | |
678 | return -EEXIST; | |
679 | ||
680 | down(&sp->members_lock); | |
681 | if (!sp->members_count) { | |
682 | rv = 0; | |
683 | goto out; | |
684 | } | |
685 | ||
686 | ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL); | |
687 | if (!ids) { | |
688 | rv = -ENOMEM; | |
689 | goto out; | |
690 | } | |
691 | ||
692 | rv = sp->members_count; | |
693 | list_for_each_entry(nd, &sp->members, list) | |
694 | ids[i++] = nd->nodeid; | |
695 | ||
696 | if (rv != i) | |
697 | printk("bad nodeid count %d %d\n", rv, i); | |
698 | ||
699 | *ids_out = ids; | |
700 | out: | |
701 | up(&sp->members_lock); | |
702 | put_space(sp); | |
703 | return rv; | |
704 | } | |
705 | ||
706 | int dlm_node_weight(char *lsname, int nodeid) | |
707 | { | |
708 | struct space *sp; | |
709 | struct node *nd; | |
710 | int w = -EEXIST; | |
711 | ||
712 | sp = get_space(lsname); | |
713 | if (!sp) | |
714 | goto out; | |
715 | ||
716 | down(&sp->members_lock); | |
717 | list_for_each_entry(nd, &sp->members, list) { | |
718 | if (nd->nodeid != nodeid) | |
719 | continue; | |
720 | w = nd->weight; | |
721 | break; | |
722 | } | |
723 | up(&sp->members_lock); | |
724 | put_space(sp); | |
725 | out: | |
726 | return w; | |
727 | } | |
728 | ||
729 | int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr) | |
730 | { | |
731 | struct comm *cm = get_comm(nodeid, NULL); | |
732 | if (!cm) | |
733 | return -EEXIST; | |
734 | if (!cm->addr_count) | |
735 | return -ENOENT; | |
736 | memcpy(addr, cm->addr[0], sizeof(*addr)); | |
737 | put_comm(cm); | |
738 | return 0; | |
739 | } | |
740 | ||
741 | int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid) | |
742 | { | |
743 | struct comm *cm = get_comm(0, addr); | |
744 | if (!cm) | |
745 | return -EEXIST; | |
746 | *nodeid = cm->nodeid; | |
747 | put_comm(cm); | |
748 | return 0; | |
749 | } | |
750 | ||
751 | int dlm_our_nodeid(void) | |
752 | { | |
753 | return local_comm ? local_comm->nodeid : 0; | |
754 | } | |
755 | ||
756 | /* num 0 is first addr, num 1 is second addr */ | |
757 | int dlm_our_addr(struct sockaddr_storage *addr, int num) | |
758 | { | |
759 | if (!local_comm) | |
760 | return -1; | |
761 | if (num + 1 > local_comm->addr_count) | |
762 | return -1; | |
763 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); | |
764 | return 0; | |
765 | } | |
766 | ||
767 | /* Config file defaults */ | |
768 | #define DEFAULT_TCP_PORT 21064 | |
769 | #define DEFAULT_BUFFER_SIZE 4096 | |
770 | #define DEFAULT_RSBTBL_SIZE 256 | |
771 | #define DEFAULT_LKBTBL_SIZE 1024 | |
772 | #define DEFAULT_DIRTBL_SIZE 512 | |
773 | #define DEFAULT_RECOVER_TIMER 5 | |
774 | #define DEFAULT_TOSS_SECS 10 | |
775 | #define DEFAULT_SCAN_SECS 5 | |
776 | ||
777 | struct dlm_config_info dlm_config = { | |
778 | .tcp_port = DEFAULT_TCP_PORT, | |
779 | .buffer_size = DEFAULT_BUFFER_SIZE, | |
780 | .rsbtbl_size = DEFAULT_RSBTBL_SIZE, | |
781 | .lkbtbl_size = DEFAULT_LKBTBL_SIZE, | |
782 | .dirtbl_size = DEFAULT_DIRTBL_SIZE, | |
783 | .recover_timer = DEFAULT_RECOVER_TIMER, | |
784 | .toss_secs = DEFAULT_TOSS_SECS, | |
785 | .scan_secs = DEFAULT_SCAN_SECS | |
786 | }; | |
787 |