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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 | ||
d200778e DT |
57 | static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a, |
58 | char *buf); | |
59 | static ssize_t store_cluster(struct config_item *i, | |
60 | struct configfs_attribute *a, | |
61 | const char *buf, size_t len); | |
e7fd4179 DT |
62 | static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, |
63 | char *buf); | |
64 | static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, | |
65 | const char *buf, size_t len); | |
66 | static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, | |
67 | char *buf); | |
68 | static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, | |
69 | const char *buf, size_t len); | |
70 | ||
71 | static ssize_t comm_nodeid_read(struct comm *cm, char *buf); | |
72 | static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len); | |
73 | static ssize_t comm_local_read(struct comm *cm, char *buf); | |
74 | static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len); | |
75 | static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len); | |
76 | static ssize_t node_nodeid_read(struct node *nd, char *buf); | |
77 | static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len); | |
78 | static ssize_t node_weight_read(struct node *nd, char *buf); | |
79 | static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len); | |
80 | ||
d200778e DT |
81 | struct 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 | ||
94 | enum { | |
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 | ||
106 | struct 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 | ||
112 | static 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) \ | |
141 | static 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 | } \ | |
146 | static ssize_t name##_read(struct cluster *cl, char *buf) \ | |
147 | { \ | |
148 | return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ | |
149 | } \ | |
150 | static struct cluster_attribute cluster_attr_##name = \ | |
151 | __CONFIGFS_ATTR(name, 0644, name##_read, name##_write) | |
152 | ||
153 | CLUSTER_ATTR(tcp_port, 1); | |
154 | CLUSTER_ATTR(buffer_size, 1); | |
155 | CLUSTER_ATTR(rsbtbl_size, 1); | |
156 | CLUSTER_ATTR(lkbtbl_size, 1); | |
157 | CLUSTER_ATTR(dirtbl_size, 1); | |
158 | CLUSTER_ATTR(recover_timer, 1); | |
159 | CLUSTER_ATTR(toss_secs, 1); | |
160 | CLUSTER_ATTR(scan_secs, 1); | |
161 | CLUSTER_ATTR(log_debug, 0); | |
162 | ||
163 | static 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 | ||
e7fd4179 DT |
176 | enum { |
177 | COMM_ATTR_NODEID = 0, | |
178 | COMM_ATTR_LOCAL, | |
179 | COMM_ATTR_ADDR, | |
180 | }; | |
181 | ||
182 | struct 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 | ||
188 | static 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 | ||
196 | static 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 | ||
204 | static 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 | ||
211 | static 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 | ||
218 | enum { | |
219 | NODE_ATTR_NODEID = 0, | |
220 | NODE_ATTR_WEIGHT, | |
221 | }; | |
222 | ||
223 | struct 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 | ||
229 | static 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 | ||
237 | static 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 | ||
245 | static 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 | ||
251 | struct clusters { | |
252 | struct configfs_subsystem subsys; | |
253 | }; | |
254 | ||
e7fd4179 DT |
255 | struct spaces { |
256 | struct config_group ss_group; | |
257 | }; | |
258 | ||
259 | struct space { | |
260 | struct config_group group; | |
261 | struct list_head members; | |
90135925 | 262 | struct mutex members_lock; |
e7fd4179 DT |
263 | int members_count; |
264 | }; | |
265 | ||
266 | struct comms { | |
267 | struct config_group cs_group; | |
268 | }; | |
269 | ||
270 | struct 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 | ||
278 | struct nodes { | |
279 | struct config_group ns_group; | |
280 | }; | |
281 | ||
282 | struct node { | |
283 | struct config_item item; | |
284 | struct list_head list; /* space->members */ | |
285 | int nodeid; | |
286 | int weight; | |
287 | }; | |
288 | ||
289 | static struct configfs_group_operations clusters_ops = { | |
290 | .make_group = make_cluster, | |
291 | .drop_item = drop_cluster, | |
292 | }; | |
293 | ||
294 | static struct configfs_item_operations cluster_ops = { | |
295 | .release = release_cluster, | |
d200778e DT |
296 | .show_attribute = show_cluster, |
297 | .store_attribute = store_cluster, | |
e7fd4179 DT |
298 | }; |
299 | ||
300 | static struct configfs_group_operations spaces_ops = { | |
301 | .make_group = make_space, | |
302 | .drop_item = drop_space, | |
303 | }; | |
304 | ||
305 | static struct configfs_item_operations space_ops = { | |
306 | .release = release_space, | |
307 | }; | |
308 | ||
309 | static struct configfs_group_operations comms_ops = { | |
310 | .make_item = make_comm, | |
311 | .drop_item = drop_comm, | |
312 | }; | |
313 | ||
314 | static struct configfs_item_operations comm_ops = { | |
315 | .release = release_comm, | |
316 | .show_attribute = show_comm, | |
317 | .store_attribute = store_comm, | |
318 | }; | |
319 | ||
320 | static struct configfs_group_operations nodes_ops = { | |
321 | .make_item = make_node, | |
322 | .drop_item = drop_node, | |
323 | }; | |
324 | ||
325 | static struct configfs_item_operations node_ops = { | |
326 | .release = release_node, | |
327 | .show_attribute = show_node, | |
328 | .store_attribute = store_node, | |
329 | }; | |
330 | ||
331 | static struct config_item_type clusters_type = { | |
332 | .ct_group_ops = &clusters_ops, | |
333 | .ct_owner = THIS_MODULE, | |
334 | }; | |
335 | ||
336 | static struct config_item_type cluster_type = { | |
337 | .ct_item_ops = &cluster_ops, | |
d200778e | 338 | .ct_attrs = cluster_attrs, |
e7fd4179 DT |
339 | .ct_owner = THIS_MODULE, |
340 | }; | |
341 | ||
342 | static struct config_item_type spaces_type = { | |
343 | .ct_group_ops = &spaces_ops, | |
344 | .ct_owner = THIS_MODULE, | |
345 | }; | |
346 | ||
347 | static struct config_item_type space_type = { | |
348 | .ct_item_ops = &space_ops, | |
349 | .ct_owner = THIS_MODULE, | |
350 | }; | |
351 | ||
352 | static struct config_item_type comms_type = { | |
353 | .ct_group_ops = &comms_ops, | |
354 | .ct_owner = THIS_MODULE, | |
355 | }; | |
356 | ||
357 | static struct config_item_type comm_type = { | |
358 | .ct_item_ops = &comm_ops, | |
359 | .ct_attrs = comm_attrs, | |
360 | .ct_owner = THIS_MODULE, | |
361 | }; | |
362 | ||
363 | static struct config_item_type nodes_type = { | |
364 | .ct_group_ops = &nodes_ops, | |
365 | .ct_owner = THIS_MODULE, | |
366 | }; | |
367 | ||
368 | static struct config_item_type node_type = { | |
369 | .ct_item_ops = &node_ops, | |
370 | .ct_attrs = node_attrs, | |
371 | .ct_owner = THIS_MODULE, | |
372 | }; | |
373 | ||
374 | static struct cluster *to_cluster(struct config_item *i) | |
375 | { | |
376 | return i ? container_of(to_config_group(i), struct cluster, group):NULL; | |
377 | } | |
378 | ||
379 | static struct space *to_space(struct config_item *i) | |
380 | { | |
381 | return i ? container_of(to_config_group(i), struct space, group) : NULL; | |
382 | } | |
383 | ||
384 | static struct comm *to_comm(struct config_item *i) | |
385 | { | |
386 | return i ? container_of(i, struct comm, item) : NULL; | |
387 | } | |
388 | ||
389 | static struct node *to_node(struct config_item *i) | |
390 | { | |
391 | return i ? container_of(i, struct node, item) : NULL; | |
392 | } | |
393 | ||
394 | static 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 | ||
d200778e DT |
419 | 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 | ||
e7fd4179 DT |
429 | 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 | ||
441 | static 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 | ||
459 | static 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 | ||
466 | static 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); | |
90135925 | 487 | mutex_init(&sp->members_lock); |
e7fd4179 DT |
488 | 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 | ||
498 | static 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 | ||
515 | static 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 | ||
522 | static 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 | ||
537 | static 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; | |
1c032c03 | 542 | dlm_lowcomms_close(cm->nodeid); |
e7fd4179 DT |
543 | while (cm->addr_count--) |
544 | kfree(cm->addr[cm->addr_count]); | |
545 | config_item_put(i); | |
546 | } | |
547 | ||
548 | static void release_comm(struct config_item *i) | |
549 | { | |
550 | struct comm *cm = to_comm(i); | |
551 | kfree(cm); | |
552 | } | |
553 | ||
554 | static 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 | ||
90135925 | 567 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
568 | list_add(&nd->list, &sp->members); |
569 | sp->members_count++; | |
90135925 | 570 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
571 | |
572 | return &nd->item; | |
573 | } | |
574 | ||
575 | static 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 | ||
90135925 | 580 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
581 | list_del(&nd->list); |
582 | sp->members_count--; | |
90135925 | 583 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
584 | |
585 | config_item_put(i); | |
586 | } | |
587 | ||
588 | static void release_node(struct config_item *i) | |
589 | { | |
590 | struct node *nd = to_node(i); | |
591 | kfree(nd); | |
592 | } | |
593 | ||
594 | static 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 | ||
605 | int 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 | ||
612 | void 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 | ||
d200778e DT |
621 | static 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 | ||
630 | static 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 | ||
e7fd4179 DT |
640 | static 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 | ||
649 | static 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 | ||
658 | static ssize_t comm_nodeid_read(struct comm *cm, char *buf) | |
659 | { | |
660 | return sprintf(buf, "%d\n", cm->nodeid); | |
661 | } | |
662 | ||
663 | static 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 | ||
669 | static ssize_t comm_local_read(struct comm *cm, char *buf) | |
670 | { | |
671 | return sprintf(buf, "%d\n", cm->local); | |
672 | } | |
673 | ||
674 | static 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 | ||
682 | static 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 | ||
701 | static 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 | ||
710 | static 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 | ||
719 | static ssize_t node_nodeid_read(struct node *nd, char *buf) | |
720 | { | |
721 | return sprintf(buf, "%d\n", nd->nodeid); | |
722 | } | |
723 | ||
724 | static 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 | ||
730 | static ssize_t node_weight_read(struct node *nd, char *buf) | |
731 | { | |
732 | return sprintf(buf, "%d\n", nd->weight); | |
733 | } | |
734 | ||
735 | static 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 | ||
745 | static 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 | ||
752 | static void put_space(struct space *sp) | |
753 | { | |
754 | config_item_put(&sp->group.cg_item); | |
755 | } | |
756 | ||
757 | static 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 | ||
793 | static void put_comm(struct comm *cm) | |
794 | { | |
795 | config_item_put(&cm->item); | |
796 | } | |
797 | ||
798 | /* caller must free mem */ | |
799 | int 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 | ||
90135925 | 810 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
811 | 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: | |
90135925 | 831 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
832 | put_space(sp); |
833 | return rv; | |
834 | } | |
835 | ||
836 | int 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 | ||
90135925 | 846 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
847 | list_for_each_entry(nd, &sp->members, list) { |
848 | if (nd->nodeid != nodeid) | |
849 | continue; | |
850 | w = nd->weight; | |
851 | break; | |
852 | } | |
90135925 | 853 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
854 | put_space(sp); |
855 | out: | |
856 | return w; | |
857 | } | |
858 | ||
859 | int 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 | ||
871 | int 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 | ||
881 | int 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 */ | |
887 | int 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 | |
99fc6487 | 906 | #define DEFAULT_LOG_DEBUG 0 |
e7fd4179 DT |
907 | |
908 | struct dlm_config_info dlm_config = { | |
68c817a1 DT |
909 | .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, | |
99fc6487 DT |
916 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
917 | .ci_log_debug = DEFAULT_LOG_DEBUG | |
e7fd4179 DT |
918 | }; |
919 |