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e7fd4179 DT |
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" | |
1c032c03 | 20 | #include "lowcomms.h" |
e7fd4179 DT |
21 | |
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 | ||
31 | static struct config_group *space_list; | |
32 | static struct config_group *comm_list; | |
33 | static struct comm *local_comm; | |
34 | ||
35 | struct clusters; | |
36 | struct cluster; | |
37 | struct spaces; | |
38 | struct space; | |
39 | struct comms; | |
40 | struct comm; | |
41 | struct nodes; | |
42 | struct node; | |
43 | ||
44 | static struct config_group *make_cluster(struct config_group *, const char *); | |
45 | static void drop_cluster(struct config_group *, struct config_item *); | |
46 | static void release_cluster(struct config_item *); | |
47 | static struct config_group *make_space(struct config_group *, const char *); | |
48 | static void drop_space(struct config_group *, struct config_item *); | |
49 | static void release_space(struct config_item *); | |
50 | static struct config_item *make_comm(struct config_group *, const char *); | |
51 | static void drop_comm(struct config_group *, struct config_item *); | |
52 | static void release_comm(struct config_item *); | |
53 | static struct config_item *make_node(struct config_group *, const char *); | |
54 | static void drop_node(struct config_group *, struct config_item *); | |
55 | static void release_node(struct config_item *); | |
56 | ||
57 | static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, | |
58 | char *buf); | |
59 | static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, | |
60 | const char *buf, size_t len); | |
61 | static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, | |
62 | char *buf); | |
63 | static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, | |
64 | const char *buf, size_t len); | |
65 | ||
66 | static ssize_t comm_nodeid_read(struct comm *cm, char *buf); | |
67 | static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len); | |
68 | static ssize_t comm_local_read(struct comm *cm, char *buf); | |
69 | static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len); | |
70 | static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len); | |
71 | static ssize_t node_nodeid_read(struct node *nd, char *buf); | |
72 | static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len); | |
73 | static ssize_t node_weight_read(struct node *nd, char *buf); | |
74 | static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len); | |
75 | ||
76 | enum { | |
77 | COMM_ATTR_NODEID = 0, | |
78 | COMM_ATTR_LOCAL, | |
79 | COMM_ATTR_ADDR, | |
80 | }; | |
81 | ||
82 | struct comm_attribute { | |
83 | struct configfs_attribute attr; | |
84 | ssize_t (*show)(struct comm *, char *); | |
85 | ssize_t (*store)(struct comm *, const char *, size_t); | |
86 | }; | |
87 | ||
88 | static struct comm_attribute comm_attr_nodeid = { | |
89 | .attr = { .ca_owner = THIS_MODULE, | |
90 | .ca_name = "nodeid", | |
91 | .ca_mode = S_IRUGO | S_IWUSR }, | |
92 | .show = comm_nodeid_read, | |
93 | .store = comm_nodeid_write, | |
94 | }; | |
95 | ||
96 | static struct comm_attribute comm_attr_local = { | |
97 | .attr = { .ca_owner = THIS_MODULE, | |
98 | .ca_name = "local", | |
99 | .ca_mode = S_IRUGO | S_IWUSR }, | |
100 | .show = comm_local_read, | |
101 | .store = comm_local_write, | |
102 | }; | |
103 | ||
104 | static struct comm_attribute comm_attr_addr = { | |
105 | .attr = { .ca_owner = THIS_MODULE, | |
106 | .ca_name = "addr", | |
107 | .ca_mode = S_IRUGO | S_IWUSR }, | |
108 | .store = comm_addr_write, | |
109 | }; | |
110 | ||
111 | static struct configfs_attribute *comm_attrs[] = { | |
112 | [COMM_ATTR_NODEID] = &comm_attr_nodeid.attr, | |
113 | [COMM_ATTR_LOCAL] = &comm_attr_local.attr, | |
114 | [COMM_ATTR_ADDR] = &comm_attr_addr.attr, | |
115 | NULL, | |
116 | }; | |
117 | ||
118 | enum { | |
119 | NODE_ATTR_NODEID = 0, | |
120 | NODE_ATTR_WEIGHT, | |
121 | }; | |
122 | ||
123 | struct node_attribute { | |
124 | struct configfs_attribute attr; | |
125 | ssize_t (*show)(struct node *, char *); | |
126 | ssize_t (*store)(struct node *, const char *, size_t); | |
127 | }; | |
128 | ||
129 | static struct node_attribute node_attr_nodeid = { | |
130 | .attr = { .ca_owner = THIS_MODULE, | |
131 | .ca_name = "nodeid", | |
132 | .ca_mode = S_IRUGO | S_IWUSR }, | |
133 | .show = node_nodeid_read, | |
134 | .store = node_nodeid_write, | |
135 | }; | |
136 | ||
137 | static struct node_attribute node_attr_weight = { | |
138 | .attr = { .ca_owner = THIS_MODULE, | |
139 | .ca_name = "weight", | |
140 | .ca_mode = S_IRUGO | S_IWUSR }, | |
141 | .show = node_weight_read, | |
142 | .store = node_weight_write, | |
143 | }; | |
144 | ||
145 | static struct configfs_attribute *node_attrs[] = { | |
146 | [NODE_ATTR_NODEID] = &node_attr_nodeid.attr, | |
147 | [NODE_ATTR_WEIGHT] = &node_attr_weight.attr, | |
148 | NULL, | |
149 | }; | |
150 | ||
151 | struct clusters { | |
152 | struct configfs_subsystem subsys; | |
153 | }; | |
154 | ||
155 | struct cluster { | |
156 | struct config_group group; | |
157 | }; | |
158 | ||
159 | struct spaces { | |
160 | struct config_group ss_group; | |
161 | }; | |
162 | ||
163 | struct space { | |
164 | struct config_group group; | |
165 | struct list_head members; | |
90135925 | 166 | struct mutex members_lock; |
e7fd4179 DT |
167 | int members_count; |
168 | }; | |
169 | ||
170 | struct comms { | |
171 | struct config_group cs_group; | |
172 | }; | |
173 | ||
174 | struct comm { | |
175 | struct config_item item; | |
176 | int nodeid; | |
177 | int local; | |
178 | int addr_count; | |
179 | struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; | |
180 | }; | |
181 | ||
182 | struct nodes { | |
183 | struct config_group ns_group; | |
184 | }; | |
185 | ||
186 | struct node { | |
187 | struct config_item item; | |
188 | struct list_head list; /* space->members */ | |
189 | int nodeid; | |
190 | int weight; | |
191 | }; | |
192 | ||
193 | static struct configfs_group_operations clusters_ops = { | |
194 | .make_group = make_cluster, | |
195 | .drop_item = drop_cluster, | |
196 | }; | |
197 | ||
198 | static struct configfs_item_operations cluster_ops = { | |
199 | .release = release_cluster, | |
200 | }; | |
201 | ||
202 | static struct configfs_group_operations spaces_ops = { | |
203 | .make_group = make_space, | |
204 | .drop_item = drop_space, | |
205 | }; | |
206 | ||
207 | static struct configfs_item_operations space_ops = { | |
208 | .release = release_space, | |
209 | }; | |
210 | ||
211 | static struct configfs_group_operations comms_ops = { | |
212 | .make_item = make_comm, | |
213 | .drop_item = drop_comm, | |
214 | }; | |
215 | ||
216 | static struct configfs_item_operations comm_ops = { | |
217 | .release = release_comm, | |
218 | .show_attribute = show_comm, | |
219 | .store_attribute = store_comm, | |
220 | }; | |
221 | ||
222 | static struct configfs_group_operations nodes_ops = { | |
223 | .make_item = make_node, | |
224 | .drop_item = drop_node, | |
225 | }; | |
226 | ||
227 | static struct configfs_item_operations node_ops = { | |
228 | .release = release_node, | |
229 | .show_attribute = show_node, | |
230 | .store_attribute = store_node, | |
231 | }; | |
232 | ||
233 | static struct config_item_type clusters_type = { | |
234 | .ct_group_ops = &clusters_ops, | |
235 | .ct_owner = THIS_MODULE, | |
236 | }; | |
237 | ||
238 | static struct config_item_type cluster_type = { | |
239 | .ct_item_ops = &cluster_ops, | |
240 | .ct_owner = THIS_MODULE, | |
241 | }; | |
242 | ||
243 | static struct config_item_type spaces_type = { | |
244 | .ct_group_ops = &spaces_ops, | |
245 | .ct_owner = THIS_MODULE, | |
246 | }; | |
247 | ||
248 | static struct config_item_type space_type = { | |
249 | .ct_item_ops = &space_ops, | |
250 | .ct_owner = THIS_MODULE, | |
251 | }; | |
252 | ||
253 | static struct config_item_type comms_type = { | |
254 | .ct_group_ops = &comms_ops, | |
255 | .ct_owner = THIS_MODULE, | |
256 | }; | |
257 | ||
258 | static struct config_item_type comm_type = { | |
259 | .ct_item_ops = &comm_ops, | |
260 | .ct_attrs = comm_attrs, | |
261 | .ct_owner = THIS_MODULE, | |
262 | }; | |
263 | ||
264 | static struct config_item_type nodes_type = { | |
265 | .ct_group_ops = &nodes_ops, | |
266 | .ct_owner = THIS_MODULE, | |
267 | }; | |
268 | ||
269 | static struct config_item_type node_type = { | |
270 | .ct_item_ops = &node_ops, | |
271 | .ct_attrs = node_attrs, | |
272 | .ct_owner = THIS_MODULE, | |
273 | }; | |
274 | ||
275 | static struct cluster *to_cluster(struct config_item *i) | |
276 | { | |
277 | return i ? container_of(to_config_group(i), struct cluster, group):NULL; | |
278 | } | |
279 | ||
280 | static struct space *to_space(struct config_item *i) | |
281 | { | |
282 | return i ? container_of(to_config_group(i), struct space, group) : NULL; | |
283 | } | |
284 | ||
285 | static struct comm *to_comm(struct config_item *i) | |
286 | { | |
287 | return i ? container_of(i, struct comm, item) : NULL; | |
288 | } | |
289 | ||
290 | static struct node *to_node(struct config_item *i) | |
291 | { | |
292 | return i ? container_of(i, struct node, item) : NULL; | |
293 | } | |
294 | ||
295 | static struct config_group *make_cluster(struct config_group *g, | |
296 | const char *name) | |
297 | { | |
298 | struct cluster *cl = NULL; | |
299 | struct spaces *sps = NULL; | |
300 | struct comms *cms = NULL; | |
301 | void *gps = NULL; | |
302 | ||
303 | cl = kzalloc(sizeof(struct cluster), GFP_KERNEL); | |
304 | gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); | |
305 | sps = kzalloc(sizeof(struct spaces), GFP_KERNEL); | |
306 | cms = kzalloc(sizeof(struct comms), GFP_KERNEL); | |
307 | ||
308 | if (!cl || !gps || !sps || !cms) | |
309 | goto fail; | |
310 | ||
311 | config_group_init_type_name(&cl->group, name, &cluster_type); | |
312 | config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); | |
313 | config_group_init_type_name(&cms->cs_group, "comms", &comms_type); | |
314 | ||
315 | cl->group.default_groups = gps; | |
316 | cl->group.default_groups[0] = &sps->ss_group; | |
317 | cl->group.default_groups[1] = &cms->cs_group; | |
318 | cl->group.default_groups[2] = NULL; | |
319 | ||
320 | space_list = &sps->ss_group; | |
321 | comm_list = &cms->cs_group; | |
322 | return &cl->group; | |
323 | ||
324 | fail: | |
325 | kfree(cl); | |
326 | kfree(gps); | |
327 | kfree(sps); | |
328 | kfree(cms); | |
329 | return NULL; | |
330 | } | |
331 | ||
332 | static void drop_cluster(struct config_group *g, struct config_item *i) | |
333 | { | |
334 | struct cluster *cl = to_cluster(i); | |
335 | struct config_item *tmp; | |
336 | int j; | |
337 | ||
338 | for (j = 0; cl->group.default_groups[j]; j++) { | |
339 | tmp = &cl->group.default_groups[j]->cg_item; | |
340 | cl->group.default_groups[j] = NULL; | |
341 | config_item_put(tmp); | |
342 | } | |
343 | ||
344 | space_list = NULL; | |
345 | comm_list = NULL; | |
346 | ||
347 | config_item_put(i); | |
348 | } | |
349 | ||
350 | static void release_cluster(struct config_item *i) | |
351 | { | |
352 | struct cluster *cl = to_cluster(i); | |
353 | kfree(cl->group.default_groups); | |
354 | kfree(cl); | |
355 | } | |
356 | ||
357 | static struct config_group *make_space(struct config_group *g, const char *name) | |
358 | { | |
359 | struct space *sp = NULL; | |
360 | struct nodes *nds = NULL; | |
361 | void *gps = NULL; | |
362 | ||
363 | sp = kzalloc(sizeof(struct space), GFP_KERNEL); | |
364 | gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL); | |
365 | nds = kzalloc(sizeof(struct nodes), GFP_KERNEL); | |
366 | ||
367 | if (!sp || !gps || !nds) | |
368 | goto fail; | |
369 | ||
370 | config_group_init_type_name(&sp->group, name, &space_type); | |
371 | config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); | |
372 | ||
373 | sp->group.default_groups = gps; | |
374 | sp->group.default_groups[0] = &nds->ns_group; | |
375 | sp->group.default_groups[1] = NULL; | |
376 | ||
377 | INIT_LIST_HEAD(&sp->members); | |
90135925 | 378 | mutex_init(&sp->members_lock); |
e7fd4179 DT |
379 | sp->members_count = 0; |
380 | return &sp->group; | |
381 | ||
382 | fail: | |
383 | kfree(sp); | |
384 | kfree(gps); | |
385 | kfree(nds); | |
386 | return NULL; | |
387 | } | |
388 | ||
389 | static void drop_space(struct config_group *g, struct config_item *i) | |
390 | { | |
391 | struct space *sp = to_space(i); | |
392 | struct config_item *tmp; | |
393 | int j; | |
394 | ||
395 | /* assert list_empty(&sp->members) */ | |
396 | ||
397 | for (j = 0; sp->group.default_groups[j]; j++) { | |
398 | tmp = &sp->group.default_groups[j]->cg_item; | |
399 | sp->group.default_groups[j] = NULL; | |
400 | config_item_put(tmp); | |
401 | } | |
402 | ||
403 | config_item_put(i); | |
404 | } | |
405 | ||
406 | static void release_space(struct config_item *i) | |
407 | { | |
408 | struct space *sp = to_space(i); | |
409 | kfree(sp->group.default_groups); | |
410 | kfree(sp); | |
411 | } | |
412 | ||
413 | static struct config_item *make_comm(struct config_group *g, const char *name) | |
414 | { | |
415 | struct comm *cm; | |
416 | ||
417 | cm = kzalloc(sizeof(struct comm), GFP_KERNEL); | |
418 | if (!cm) | |
419 | return NULL; | |
420 | ||
421 | config_item_init_type_name(&cm->item, name, &comm_type); | |
422 | cm->nodeid = -1; | |
423 | cm->local = 0; | |
424 | cm->addr_count = 0; | |
425 | return &cm->item; | |
426 | } | |
427 | ||
428 | static void drop_comm(struct config_group *g, struct config_item *i) | |
429 | { | |
430 | struct comm *cm = to_comm(i); | |
431 | if (local_comm == cm) | |
432 | local_comm = NULL; | |
1c032c03 | 433 | dlm_lowcomms_close(cm->nodeid); |
e7fd4179 DT |
434 | while (cm->addr_count--) |
435 | kfree(cm->addr[cm->addr_count]); | |
436 | config_item_put(i); | |
437 | } | |
438 | ||
439 | static void release_comm(struct config_item *i) | |
440 | { | |
441 | struct comm *cm = to_comm(i); | |
442 | kfree(cm); | |
443 | } | |
444 | ||
445 | static struct config_item *make_node(struct config_group *g, const char *name) | |
446 | { | |
447 | struct space *sp = to_space(g->cg_item.ci_parent); | |
448 | struct node *nd; | |
449 | ||
450 | nd = kzalloc(sizeof(struct node), GFP_KERNEL); | |
451 | if (!nd) | |
452 | return NULL; | |
453 | ||
454 | config_item_init_type_name(&nd->item, name, &node_type); | |
455 | nd->nodeid = -1; | |
456 | nd->weight = 1; /* default weight of 1 if none is set */ | |
457 | ||
90135925 | 458 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
459 | list_add(&nd->list, &sp->members); |
460 | sp->members_count++; | |
90135925 | 461 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
462 | |
463 | return &nd->item; | |
464 | } | |
465 | ||
466 | static void drop_node(struct config_group *g, struct config_item *i) | |
467 | { | |
468 | struct space *sp = to_space(g->cg_item.ci_parent); | |
469 | struct node *nd = to_node(i); | |
470 | ||
90135925 | 471 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
472 | list_del(&nd->list); |
473 | sp->members_count--; | |
90135925 | 474 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
475 | |
476 | config_item_put(i); | |
477 | } | |
478 | ||
479 | static void release_node(struct config_item *i) | |
480 | { | |
481 | struct node *nd = to_node(i); | |
482 | kfree(nd); | |
483 | } | |
484 | ||
485 | static struct clusters clusters_root = { | |
486 | .subsys = { | |
487 | .su_group = { | |
488 | .cg_item = { | |
489 | .ci_namebuf = "dlm", | |
490 | .ci_type = &clusters_type, | |
491 | }, | |
492 | }, | |
493 | }, | |
494 | }; | |
495 | ||
496 | int dlm_config_init(void) | |
497 | { | |
498 | config_group_init(&clusters_root.subsys.su_group); | |
499 | init_MUTEX(&clusters_root.subsys.su_sem); | |
500 | return configfs_register_subsystem(&clusters_root.subsys); | |
501 | } | |
502 | ||
503 | void dlm_config_exit(void) | |
504 | { | |
505 | configfs_unregister_subsystem(&clusters_root.subsys); | |
506 | } | |
507 | ||
508 | /* | |
509 | * Functions for user space to read/write attributes | |
510 | */ | |
511 | ||
512 | static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, | |
513 | char *buf) | |
514 | { | |
515 | struct comm *cm = to_comm(i); | |
516 | struct comm_attribute *cma = | |
517 | container_of(a, struct comm_attribute, attr); | |
518 | return cma->show ? cma->show(cm, buf) : 0; | |
519 | } | |
520 | ||
521 | static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, | |
522 | const char *buf, size_t len) | |
523 | { | |
524 | struct comm *cm = to_comm(i); | |
525 | struct comm_attribute *cma = | |
526 | container_of(a, struct comm_attribute, attr); | |
527 | return cma->store ? cma->store(cm, buf, len) : -EINVAL; | |
528 | } | |
529 | ||
530 | static ssize_t comm_nodeid_read(struct comm *cm, char *buf) | |
531 | { | |
532 | return sprintf(buf, "%d\n", cm->nodeid); | |
533 | } | |
534 | ||
535 | static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len) | |
536 | { | |
537 | cm->nodeid = simple_strtol(buf, NULL, 0); | |
538 | return len; | |
539 | } | |
540 | ||
541 | static ssize_t comm_local_read(struct comm *cm, char *buf) | |
542 | { | |
543 | return sprintf(buf, "%d\n", cm->local); | |
544 | } | |
545 | ||
546 | static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len) | |
547 | { | |
548 | cm->local= simple_strtol(buf, NULL, 0); | |
549 | if (cm->local && !local_comm) | |
550 | local_comm = cm; | |
551 | return len; | |
552 | } | |
553 | ||
554 | static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len) | |
555 | { | |
556 | struct sockaddr_storage *addr; | |
557 | ||
558 | if (len != sizeof(struct sockaddr_storage)) | |
559 | return -EINVAL; | |
560 | ||
561 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) | |
562 | return -ENOSPC; | |
563 | ||
564 | addr = kzalloc(sizeof(*addr), GFP_KERNEL); | |
565 | if (!addr) | |
566 | return -ENOMEM; | |
567 | ||
568 | memcpy(addr, buf, len); | |
569 | cm->addr[cm->addr_count++] = addr; | |
570 | return len; | |
571 | } | |
572 | ||
573 | static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, | |
574 | char *buf) | |
575 | { | |
576 | struct node *nd = to_node(i); | |
577 | struct node_attribute *nda = | |
578 | container_of(a, struct node_attribute, attr); | |
579 | return nda->show ? nda->show(nd, buf) : 0; | |
580 | } | |
581 | ||
582 | static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, | |
583 | const char *buf, size_t len) | |
584 | { | |
585 | struct node *nd = to_node(i); | |
586 | struct node_attribute *nda = | |
587 | container_of(a, struct node_attribute, attr); | |
588 | return nda->store ? nda->store(nd, buf, len) : -EINVAL; | |
589 | } | |
590 | ||
591 | static ssize_t node_nodeid_read(struct node *nd, char *buf) | |
592 | { | |
593 | return sprintf(buf, "%d\n", nd->nodeid); | |
594 | } | |
595 | ||
596 | static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len) | |
597 | { | |
598 | nd->nodeid = simple_strtol(buf, NULL, 0); | |
599 | return len; | |
600 | } | |
601 | ||
602 | static ssize_t node_weight_read(struct node *nd, char *buf) | |
603 | { | |
604 | return sprintf(buf, "%d\n", nd->weight); | |
605 | } | |
606 | ||
607 | static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len) | |
608 | { | |
609 | nd->weight = simple_strtol(buf, NULL, 0); | |
610 | return len; | |
611 | } | |
612 | ||
613 | /* | |
614 | * Functions for the dlm to get the info that's been configured | |
615 | */ | |
616 | ||
617 | static struct space *get_space(char *name) | |
618 | { | |
619 | if (!space_list) | |
620 | return NULL; | |
621 | return to_space(config_group_find_obj(space_list, name)); | |
622 | } | |
623 | ||
624 | static void put_space(struct space *sp) | |
625 | { | |
626 | config_item_put(&sp->group.cg_item); | |
627 | } | |
628 | ||
629 | static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr) | |
630 | { | |
631 | struct config_item *i; | |
632 | struct comm *cm = NULL; | |
633 | int found = 0; | |
634 | ||
635 | if (!comm_list) | |
636 | return NULL; | |
637 | ||
638 | down(&clusters_root.subsys.su_sem); | |
639 | ||
640 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { | |
641 | cm = to_comm(i); | |
642 | ||
643 | if (nodeid) { | |
644 | if (cm->nodeid != nodeid) | |
645 | continue; | |
646 | found = 1; | |
647 | break; | |
648 | } else { | |
649 | if (!cm->addr_count || | |
650 | memcmp(cm->addr[0], addr, sizeof(*addr))) | |
651 | continue; | |
652 | found = 1; | |
653 | break; | |
654 | } | |
655 | } | |
656 | up(&clusters_root.subsys.su_sem); | |
657 | ||
658 | if (found) | |
659 | config_item_get(i); | |
660 | else | |
661 | cm = NULL; | |
662 | return cm; | |
663 | } | |
664 | ||
665 | static void put_comm(struct comm *cm) | |
666 | { | |
667 | config_item_put(&cm->item); | |
668 | } | |
669 | ||
670 | /* caller must free mem */ | |
671 | int dlm_nodeid_list(char *lsname, int **ids_out) | |
672 | { | |
673 | struct space *sp; | |
674 | struct node *nd; | |
675 | int i = 0, rv = 0; | |
676 | int *ids; | |
677 | ||
678 | sp = get_space(lsname); | |
679 | if (!sp) | |
680 | return -EEXIST; | |
681 | ||
90135925 | 682 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
683 | if (!sp->members_count) { |
684 | rv = 0; | |
685 | goto out; | |
686 | } | |
687 | ||
688 | ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL); | |
689 | if (!ids) { | |
690 | rv = -ENOMEM; | |
691 | goto out; | |
692 | } | |
693 | ||
694 | rv = sp->members_count; | |
695 | list_for_each_entry(nd, &sp->members, list) | |
696 | ids[i++] = nd->nodeid; | |
697 | ||
698 | if (rv != i) | |
699 | printk("bad nodeid count %d %d\n", rv, i); | |
700 | ||
701 | *ids_out = ids; | |
702 | out: | |
90135925 | 703 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
704 | put_space(sp); |
705 | return rv; | |
706 | } | |
707 | ||
708 | int dlm_node_weight(char *lsname, int nodeid) | |
709 | { | |
710 | struct space *sp; | |
711 | struct node *nd; | |
712 | int w = -EEXIST; | |
713 | ||
714 | sp = get_space(lsname); | |
715 | if (!sp) | |
716 | goto out; | |
717 | ||
90135925 | 718 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
719 | list_for_each_entry(nd, &sp->members, list) { |
720 | if (nd->nodeid != nodeid) | |
721 | continue; | |
722 | w = nd->weight; | |
723 | break; | |
724 | } | |
90135925 | 725 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
726 | put_space(sp); |
727 | out: | |
728 | return w; | |
729 | } | |
730 | ||
731 | int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr) | |
732 | { | |
733 | struct comm *cm = get_comm(nodeid, NULL); | |
734 | if (!cm) | |
735 | return -EEXIST; | |
736 | if (!cm->addr_count) | |
737 | return -ENOENT; | |
738 | memcpy(addr, cm->addr[0], sizeof(*addr)); | |
739 | put_comm(cm); | |
740 | return 0; | |
741 | } | |
742 | ||
743 | int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid) | |
744 | { | |
745 | struct comm *cm = get_comm(0, addr); | |
746 | if (!cm) | |
747 | return -EEXIST; | |
748 | *nodeid = cm->nodeid; | |
749 | put_comm(cm); | |
750 | return 0; | |
751 | } | |
752 | ||
753 | int dlm_our_nodeid(void) | |
754 | { | |
755 | return local_comm ? local_comm->nodeid : 0; | |
756 | } | |
757 | ||
758 | /* num 0 is first addr, num 1 is second addr */ | |
759 | int dlm_our_addr(struct sockaddr_storage *addr, int num) | |
760 | { | |
761 | if (!local_comm) | |
762 | return -1; | |
763 | if (num + 1 > local_comm->addr_count) | |
764 | return -1; | |
765 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); | |
766 | return 0; | |
767 | } | |
768 | ||
769 | /* Config file defaults */ | |
770 | #define DEFAULT_TCP_PORT 21064 | |
771 | #define DEFAULT_BUFFER_SIZE 4096 | |
772 | #define DEFAULT_RSBTBL_SIZE 256 | |
773 | #define DEFAULT_LKBTBL_SIZE 1024 | |
774 | #define DEFAULT_DIRTBL_SIZE 512 | |
775 | #define DEFAULT_RECOVER_TIMER 5 | |
776 | #define DEFAULT_TOSS_SECS 10 | |
777 | #define DEFAULT_SCAN_SECS 5 | |
99fc6487 | 778 | #define DEFAULT_LOG_DEBUG 0 |
e7fd4179 DT |
779 | |
780 | struct dlm_config_info dlm_config = { | |
68c817a1 DT |
781 | .ci_tcp_port = DEFAULT_TCP_PORT, |
782 | .ci_buffer_size = DEFAULT_BUFFER_SIZE, | |
783 | .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, | |
784 | .ci_lkbtbl_size = DEFAULT_LKBTBL_SIZE, | |
785 | .ci_dirtbl_size = DEFAULT_DIRTBL_SIZE, | |
786 | .ci_recover_timer = DEFAULT_RECOVER_TIMER, | |
787 | .ci_toss_secs = DEFAULT_TOSS_SECS, | |
99fc6487 DT |
788 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
789 | .ci_log_debug = DEFAULT_LOG_DEBUG | |
e7fd4179 DT |
790 | }; |
791 |