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e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
6ed7257b | 5 | ** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
e7fd4179 DT |
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; | |
6ed7257b | 92 | unsigned int cl_protocol; |
d200778e DT |
93 | }; |
94 | ||
95 | enum { | |
96 | CLUSTER_ATTR_TCP_PORT = 0, | |
97 | CLUSTER_ATTR_BUFFER_SIZE, | |
98 | CLUSTER_ATTR_RSBTBL_SIZE, | |
99 | CLUSTER_ATTR_LKBTBL_SIZE, | |
100 | CLUSTER_ATTR_DIRTBL_SIZE, | |
101 | CLUSTER_ATTR_RECOVER_TIMER, | |
102 | CLUSTER_ATTR_TOSS_SECS, | |
103 | CLUSTER_ATTR_SCAN_SECS, | |
104 | CLUSTER_ATTR_LOG_DEBUG, | |
6ed7257b | 105 | CLUSTER_ATTR_PROTOCOL, |
d200778e DT |
106 | }; |
107 | ||
108 | struct cluster_attribute { | |
109 | struct configfs_attribute attr; | |
110 | ssize_t (*show)(struct cluster *, char *); | |
111 | ssize_t (*store)(struct cluster *, const char *, size_t); | |
112 | }; | |
113 | ||
114 | static ssize_t cluster_set(struct cluster *cl, unsigned int *cl_field, | |
115 | unsigned int *info_field, int check_zero, | |
116 | const char *buf, size_t len) | |
117 | { | |
118 | unsigned int x; | |
119 | ||
120 | if (!capable(CAP_SYS_ADMIN)) | |
121 | return -EACCES; | |
122 | ||
123 | x = simple_strtoul(buf, NULL, 0); | |
124 | ||
125 | if (check_zero && !x) | |
126 | return -EINVAL; | |
127 | ||
128 | *cl_field = x; | |
129 | *info_field = x; | |
130 | ||
131 | return len; | |
132 | } | |
133 | ||
134 | #define __CONFIGFS_ATTR(_name,_mode,_read,_write) { \ | |
135 | .attr = { .ca_name = __stringify(_name), \ | |
136 | .ca_mode = _mode, \ | |
137 | .ca_owner = THIS_MODULE }, \ | |
138 | .show = _read, \ | |
139 | .store = _write, \ | |
140 | } | |
141 | ||
142 | #define CLUSTER_ATTR(name, check_zero) \ | |
143 | static ssize_t name##_write(struct cluster *cl, const char *buf, size_t len) \ | |
144 | { \ | |
145 | return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ | |
146 | check_zero, buf, len); \ | |
147 | } \ | |
148 | static ssize_t name##_read(struct cluster *cl, char *buf) \ | |
149 | { \ | |
150 | return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ | |
151 | } \ | |
152 | static struct cluster_attribute cluster_attr_##name = \ | |
153 | __CONFIGFS_ATTR(name, 0644, name##_read, name##_write) | |
154 | ||
155 | CLUSTER_ATTR(tcp_port, 1); | |
156 | CLUSTER_ATTR(buffer_size, 1); | |
157 | CLUSTER_ATTR(rsbtbl_size, 1); | |
158 | CLUSTER_ATTR(lkbtbl_size, 1); | |
159 | CLUSTER_ATTR(dirtbl_size, 1); | |
160 | CLUSTER_ATTR(recover_timer, 1); | |
161 | CLUSTER_ATTR(toss_secs, 1); | |
162 | CLUSTER_ATTR(scan_secs, 1); | |
163 | CLUSTER_ATTR(log_debug, 0); | |
6ed7257b | 164 | CLUSTER_ATTR(protocol, 0); |
d200778e DT |
165 | |
166 | static struct configfs_attribute *cluster_attrs[] = { | |
167 | [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr, | |
168 | [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr, | |
169 | [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr, | |
170 | [CLUSTER_ATTR_LKBTBL_SIZE] = &cluster_attr_lkbtbl_size.attr, | |
171 | [CLUSTER_ATTR_DIRTBL_SIZE] = &cluster_attr_dirtbl_size.attr, | |
172 | [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr, | |
173 | [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr, | |
174 | [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr, | |
175 | [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr, | |
6ed7257b | 176 | [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol.attr, |
d200778e DT |
177 | NULL, |
178 | }; | |
179 | ||
e7fd4179 DT |
180 | enum { |
181 | COMM_ATTR_NODEID = 0, | |
182 | COMM_ATTR_LOCAL, | |
183 | COMM_ATTR_ADDR, | |
184 | }; | |
185 | ||
186 | struct comm_attribute { | |
187 | struct configfs_attribute attr; | |
188 | ssize_t (*show)(struct comm *, char *); | |
189 | ssize_t (*store)(struct comm *, const char *, size_t); | |
190 | }; | |
191 | ||
192 | static struct comm_attribute comm_attr_nodeid = { | |
193 | .attr = { .ca_owner = THIS_MODULE, | |
194 | .ca_name = "nodeid", | |
195 | .ca_mode = S_IRUGO | S_IWUSR }, | |
196 | .show = comm_nodeid_read, | |
197 | .store = comm_nodeid_write, | |
198 | }; | |
199 | ||
200 | static struct comm_attribute comm_attr_local = { | |
201 | .attr = { .ca_owner = THIS_MODULE, | |
202 | .ca_name = "local", | |
203 | .ca_mode = S_IRUGO | S_IWUSR }, | |
204 | .show = comm_local_read, | |
205 | .store = comm_local_write, | |
206 | }; | |
207 | ||
208 | static struct comm_attribute comm_attr_addr = { | |
209 | .attr = { .ca_owner = THIS_MODULE, | |
210 | .ca_name = "addr", | |
211 | .ca_mode = S_IRUGO | S_IWUSR }, | |
212 | .store = comm_addr_write, | |
213 | }; | |
214 | ||
215 | static struct configfs_attribute *comm_attrs[] = { | |
216 | [COMM_ATTR_NODEID] = &comm_attr_nodeid.attr, | |
217 | [COMM_ATTR_LOCAL] = &comm_attr_local.attr, | |
218 | [COMM_ATTR_ADDR] = &comm_attr_addr.attr, | |
219 | NULL, | |
220 | }; | |
221 | ||
222 | enum { | |
223 | NODE_ATTR_NODEID = 0, | |
224 | NODE_ATTR_WEIGHT, | |
225 | }; | |
226 | ||
227 | struct node_attribute { | |
228 | struct configfs_attribute attr; | |
229 | ssize_t (*show)(struct node *, char *); | |
230 | ssize_t (*store)(struct node *, const char *, size_t); | |
231 | }; | |
232 | ||
233 | static struct node_attribute node_attr_nodeid = { | |
234 | .attr = { .ca_owner = THIS_MODULE, | |
235 | .ca_name = "nodeid", | |
236 | .ca_mode = S_IRUGO | S_IWUSR }, | |
237 | .show = node_nodeid_read, | |
238 | .store = node_nodeid_write, | |
239 | }; | |
240 | ||
241 | static struct node_attribute node_attr_weight = { | |
242 | .attr = { .ca_owner = THIS_MODULE, | |
243 | .ca_name = "weight", | |
244 | .ca_mode = S_IRUGO | S_IWUSR }, | |
245 | .show = node_weight_read, | |
246 | .store = node_weight_write, | |
247 | }; | |
248 | ||
249 | static struct configfs_attribute *node_attrs[] = { | |
250 | [NODE_ATTR_NODEID] = &node_attr_nodeid.attr, | |
251 | [NODE_ATTR_WEIGHT] = &node_attr_weight.attr, | |
252 | NULL, | |
253 | }; | |
254 | ||
255 | struct clusters { | |
256 | struct configfs_subsystem subsys; | |
257 | }; | |
258 | ||
e7fd4179 DT |
259 | struct spaces { |
260 | struct config_group ss_group; | |
261 | }; | |
262 | ||
263 | struct space { | |
264 | struct config_group group; | |
265 | struct list_head members; | |
90135925 | 266 | struct mutex members_lock; |
e7fd4179 DT |
267 | int members_count; |
268 | }; | |
269 | ||
270 | struct comms { | |
271 | struct config_group cs_group; | |
272 | }; | |
273 | ||
274 | struct comm { | |
275 | struct config_item item; | |
276 | int nodeid; | |
277 | int local; | |
278 | int addr_count; | |
279 | struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; | |
280 | }; | |
281 | ||
282 | struct nodes { | |
283 | struct config_group ns_group; | |
284 | }; | |
285 | ||
286 | struct node { | |
287 | struct config_item item; | |
288 | struct list_head list; /* space->members */ | |
289 | int nodeid; | |
290 | int weight; | |
291 | }; | |
292 | ||
293 | static struct configfs_group_operations clusters_ops = { | |
294 | .make_group = make_cluster, | |
295 | .drop_item = drop_cluster, | |
296 | }; | |
297 | ||
298 | static struct configfs_item_operations cluster_ops = { | |
299 | .release = release_cluster, | |
d200778e DT |
300 | .show_attribute = show_cluster, |
301 | .store_attribute = store_cluster, | |
e7fd4179 DT |
302 | }; |
303 | ||
304 | static struct configfs_group_operations spaces_ops = { | |
305 | .make_group = make_space, | |
306 | .drop_item = drop_space, | |
307 | }; | |
308 | ||
309 | static struct configfs_item_operations space_ops = { | |
310 | .release = release_space, | |
311 | }; | |
312 | ||
313 | static struct configfs_group_operations comms_ops = { | |
314 | .make_item = make_comm, | |
315 | .drop_item = drop_comm, | |
316 | }; | |
317 | ||
318 | static struct configfs_item_operations comm_ops = { | |
319 | .release = release_comm, | |
320 | .show_attribute = show_comm, | |
321 | .store_attribute = store_comm, | |
322 | }; | |
323 | ||
324 | static struct configfs_group_operations nodes_ops = { | |
325 | .make_item = make_node, | |
326 | .drop_item = drop_node, | |
327 | }; | |
328 | ||
329 | static struct configfs_item_operations node_ops = { | |
330 | .release = release_node, | |
331 | .show_attribute = show_node, | |
332 | .store_attribute = store_node, | |
333 | }; | |
334 | ||
335 | static struct config_item_type clusters_type = { | |
336 | .ct_group_ops = &clusters_ops, | |
337 | .ct_owner = THIS_MODULE, | |
338 | }; | |
339 | ||
340 | static struct config_item_type cluster_type = { | |
341 | .ct_item_ops = &cluster_ops, | |
d200778e | 342 | .ct_attrs = cluster_attrs, |
e7fd4179 DT |
343 | .ct_owner = THIS_MODULE, |
344 | }; | |
345 | ||
346 | static struct config_item_type spaces_type = { | |
347 | .ct_group_ops = &spaces_ops, | |
348 | .ct_owner = THIS_MODULE, | |
349 | }; | |
350 | ||
351 | static struct config_item_type space_type = { | |
352 | .ct_item_ops = &space_ops, | |
353 | .ct_owner = THIS_MODULE, | |
354 | }; | |
355 | ||
356 | static struct config_item_type comms_type = { | |
357 | .ct_group_ops = &comms_ops, | |
358 | .ct_owner = THIS_MODULE, | |
359 | }; | |
360 | ||
361 | static struct config_item_type comm_type = { | |
362 | .ct_item_ops = &comm_ops, | |
363 | .ct_attrs = comm_attrs, | |
364 | .ct_owner = THIS_MODULE, | |
365 | }; | |
366 | ||
367 | static struct config_item_type nodes_type = { | |
368 | .ct_group_ops = &nodes_ops, | |
369 | .ct_owner = THIS_MODULE, | |
370 | }; | |
371 | ||
372 | static struct config_item_type node_type = { | |
373 | .ct_item_ops = &node_ops, | |
374 | .ct_attrs = node_attrs, | |
375 | .ct_owner = THIS_MODULE, | |
376 | }; | |
377 | ||
378 | static struct cluster *to_cluster(struct config_item *i) | |
379 | { | |
380 | return i ? container_of(to_config_group(i), struct cluster, group):NULL; | |
381 | } | |
382 | ||
383 | static struct space *to_space(struct config_item *i) | |
384 | { | |
385 | return i ? container_of(to_config_group(i), struct space, group) : NULL; | |
386 | } | |
387 | ||
388 | static struct comm *to_comm(struct config_item *i) | |
389 | { | |
390 | return i ? container_of(i, struct comm, item) : NULL; | |
391 | } | |
392 | ||
393 | static struct node *to_node(struct config_item *i) | |
394 | { | |
395 | return i ? container_of(i, struct node, item) : NULL; | |
396 | } | |
397 | ||
398 | static struct config_group *make_cluster(struct config_group *g, | |
399 | const char *name) | |
400 | { | |
401 | struct cluster *cl = NULL; | |
402 | struct spaces *sps = NULL; | |
403 | struct comms *cms = NULL; | |
404 | void *gps = NULL; | |
405 | ||
406 | cl = kzalloc(sizeof(struct cluster), GFP_KERNEL); | |
407 | gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); | |
408 | sps = kzalloc(sizeof(struct spaces), GFP_KERNEL); | |
409 | cms = kzalloc(sizeof(struct comms), GFP_KERNEL); | |
410 | ||
411 | if (!cl || !gps || !sps || !cms) | |
412 | goto fail; | |
413 | ||
414 | config_group_init_type_name(&cl->group, name, &cluster_type); | |
415 | config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); | |
416 | config_group_init_type_name(&cms->cs_group, "comms", &comms_type); | |
417 | ||
418 | cl->group.default_groups = gps; | |
419 | cl->group.default_groups[0] = &sps->ss_group; | |
420 | cl->group.default_groups[1] = &cms->cs_group; | |
421 | cl->group.default_groups[2] = NULL; | |
422 | ||
d200778e DT |
423 | cl->cl_tcp_port = dlm_config.ci_tcp_port; |
424 | cl->cl_buffer_size = dlm_config.ci_buffer_size; | |
425 | cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; | |
426 | cl->cl_lkbtbl_size = dlm_config.ci_lkbtbl_size; | |
427 | cl->cl_dirtbl_size = dlm_config.ci_dirtbl_size; | |
428 | cl->cl_recover_timer = dlm_config.ci_recover_timer; | |
429 | cl->cl_toss_secs = dlm_config.ci_toss_secs; | |
430 | cl->cl_scan_secs = dlm_config.ci_scan_secs; | |
431 | cl->cl_log_debug = dlm_config.ci_log_debug; | |
432 | ||
e7fd4179 DT |
433 | space_list = &sps->ss_group; |
434 | comm_list = &cms->cs_group; | |
435 | return &cl->group; | |
436 | ||
437 | fail: | |
438 | kfree(cl); | |
439 | kfree(gps); | |
440 | kfree(sps); | |
441 | kfree(cms); | |
442 | return NULL; | |
443 | } | |
444 | ||
445 | static void drop_cluster(struct config_group *g, struct config_item *i) | |
446 | { | |
447 | struct cluster *cl = to_cluster(i); | |
448 | struct config_item *tmp; | |
449 | int j; | |
450 | ||
451 | for (j = 0; cl->group.default_groups[j]; j++) { | |
452 | tmp = &cl->group.default_groups[j]->cg_item; | |
453 | cl->group.default_groups[j] = NULL; | |
454 | config_item_put(tmp); | |
455 | } | |
456 | ||
457 | space_list = NULL; | |
458 | comm_list = NULL; | |
459 | ||
460 | config_item_put(i); | |
461 | } | |
462 | ||
463 | static void release_cluster(struct config_item *i) | |
464 | { | |
465 | struct cluster *cl = to_cluster(i); | |
466 | kfree(cl->group.default_groups); | |
467 | kfree(cl); | |
468 | } | |
469 | ||
470 | static struct config_group *make_space(struct config_group *g, const char *name) | |
471 | { | |
472 | struct space *sp = NULL; | |
473 | struct nodes *nds = NULL; | |
474 | void *gps = NULL; | |
475 | ||
476 | sp = kzalloc(sizeof(struct space), GFP_KERNEL); | |
477 | gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL); | |
478 | nds = kzalloc(sizeof(struct nodes), GFP_KERNEL); | |
479 | ||
480 | if (!sp || !gps || !nds) | |
481 | goto fail; | |
482 | ||
483 | config_group_init_type_name(&sp->group, name, &space_type); | |
484 | config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); | |
485 | ||
486 | sp->group.default_groups = gps; | |
487 | sp->group.default_groups[0] = &nds->ns_group; | |
488 | sp->group.default_groups[1] = NULL; | |
489 | ||
490 | INIT_LIST_HEAD(&sp->members); | |
90135925 | 491 | mutex_init(&sp->members_lock); |
e7fd4179 DT |
492 | sp->members_count = 0; |
493 | return &sp->group; | |
494 | ||
495 | fail: | |
496 | kfree(sp); | |
497 | kfree(gps); | |
498 | kfree(nds); | |
499 | return NULL; | |
500 | } | |
501 | ||
502 | static void drop_space(struct config_group *g, struct config_item *i) | |
503 | { | |
504 | struct space *sp = to_space(i); | |
505 | struct config_item *tmp; | |
506 | int j; | |
507 | ||
508 | /* assert list_empty(&sp->members) */ | |
509 | ||
510 | for (j = 0; sp->group.default_groups[j]; j++) { | |
511 | tmp = &sp->group.default_groups[j]->cg_item; | |
512 | sp->group.default_groups[j] = NULL; | |
513 | config_item_put(tmp); | |
514 | } | |
515 | ||
516 | config_item_put(i); | |
517 | } | |
518 | ||
519 | static void release_space(struct config_item *i) | |
520 | { | |
521 | struct space *sp = to_space(i); | |
522 | kfree(sp->group.default_groups); | |
523 | kfree(sp); | |
524 | } | |
525 | ||
526 | static struct config_item *make_comm(struct config_group *g, const char *name) | |
527 | { | |
528 | struct comm *cm; | |
529 | ||
530 | cm = kzalloc(sizeof(struct comm), GFP_KERNEL); | |
531 | if (!cm) | |
532 | return NULL; | |
533 | ||
534 | config_item_init_type_name(&cm->item, name, &comm_type); | |
535 | cm->nodeid = -1; | |
536 | cm->local = 0; | |
537 | cm->addr_count = 0; | |
538 | return &cm->item; | |
539 | } | |
540 | ||
541 | static void drop_comm(struct config_group *g, struct config_item *i) | |
542 | { | |
543 | struct comm *cm = to_comm(i); | |
544 | if (local_comm == cm) | |
545 | local_comm = NULL; | |
1c032c03 | 546 | dlm_lowcomms_close(cm->nodeid); |
e7fd4179 DT |
547 | while (cm->addr_count--) |
548 | kfree(cm->addr[cm->addr_count]); | |
549 | config_item_put(i); | |
550 | } | |
551 | ||
552 | static void release_comm(struct config_item *i) | |
553 | { | |
554 | struct comm *cm = to_comm(i); | |
555 | kfree(cm); | |
556 | } | |
557 | ||
558 | static struct config_item *make_node(struct config_group *g, const char *name) | |
559 | { | |
560 | struct space *sp = to_space(g->cg_item.ci_parent); | |
561 | struct node *nd; | |
562 | ||
563 | nd = kzalloc(sizeof(struct node), GFP_KERNEL); | |
564 | if (!nd) | |
565 | return NULL; | |
566 | ||
567 | config_item_init_type_name(&nd->item, name, &node_type); | |
568 | nd->nodeid = -1; | |
569 | nd->weight = 1; /* default weight of 1 if none is set */ | |
570 | ||
90135925 | 571 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
572 | list_add(&nd->list, &sp->members); |
573 | sp->members_count++; | |
90135925 | 574 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
575 | |
576 | return &nd->item; | |
577 | } | |
578 | ||
579 | static void drop_node(struct config_group *g, struct config_item *i) | |
580 | { | |
581 | struct space *sp = to_space(g->cg_item.ci_parent); | |
582 | struct node *nd = to_node(i); | |
583 | ||
90135925 | 584 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
585 | list_del(&nd->list); |
586 | sp->members_count--; | |
90135925 | 587 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
588 | |
589 | config_item_put(i); | |
590 | } | |
591 | ||
592 | static void release_node(struct config_item *i) | |
593 | { | |
594 | struct node *nd = to_node(i); | |
595 | kfree(nd); | |
596 | } | |
597 | ||
598 | static struct clusters clusters_root = { | |
599 | .subsys = { | |
600 | .su_group = { | |
601 | .cg_item = { | |
602 | .ci_namebuf = "dlm", | |
603 | .ci_type = &clusters_type, | |
604 | }, | |
605 | }, | |
606 | }, | |
607 | }; | |
608 | ||
609 | int dlm_config_init(void) | |
610 | { | |
611 | config_group_init(&clusters_root.subsys.su_group); | |
612 | init_MUTEX(&clusters_root.subsys.su_sem); | |
613 | return configfs_register_subsystem(&clusters_root.subsys); | |
614 | } | |
615 | ||
616 | void dlm_config_exit(void) | |
617 | { | |
618 | configfs_unregister_subsystem(&clusters_root.subsys); | |
619 | } | |
620 | ||
621 | /* | |
622 | * Functions for user space to read/write attributes | |
623 | */ | |
624 | ||
d200778e DT |
625 | static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a, |
626 | char *buf) | |
627 | { | |
628 | struct cluster *cl = to_cluster(i); | |
629 | struct cluster_attribute *cla = | |
630 | container_of(a, struct cluster_attribute, attr); | |
631 | return cla->show ? cla->show(cl, buf) : 0; | |
632 | } | |
633 | ||
634 | static ssize_t store_cluster(struct config_item *i, | |
635 | struct configfs_attribute *a, | |
636 | const char *buf, size_t len) | |
637 | { | |
638 | struct cluster *cl = to_cluster(i); | |
639 | struct cluster_attribute *cla = | |
640 | container_of(a, struct cluster_attribute, attr); | |
641 | return cla->store ? cla->store(cl, buf, len) : -EINVAL; | |
642 | } | |
643 | ||
e7fd4179 DT |
644 | static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a, |
645 | char *buf) | |
646 | { | |
647 | struct comm *cm = to_comm(i); | |
648 | struct comm_attribute *cma = | |
649 | container_of(a, struct comm_attribute, attr); | |
650 | return cma->show ? cma->show(cm, buf) : 0; | |
651 | } | |
652 | ||
653 | static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, | |
654 | const char *buf, size_t len) | |
655 | { | |
656 | struct comm *cm = to_comm(i); | |
657 | struct comm_attribute *cma = | |
658 | container_of(a, struct comm_attribute, attr); | |
659 | return cma->store ? cma->store(cm, buf, len) : -EINVAL; | |
660 | } | |
661 | ||
662 | static ssize_t comm_nodeid_read(struct comm *cm, char *buf) | |
663 | { | |
664 | return sprintf(buf, "%d\n", cm->nodeid); | |
665 | } | |
666 | ||
667 | static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len) | |
668 | { | |
669 | cm->nodeid = simple_strtol(buf, NULL, 0); | |
670 | return len; | |
671 | } | |
672 | ||
673 | static ssize_t comm_local_read(struct comm *cm, char *buf) | |
674 | { | |
675 | return sprintf(buf, "%d\n", cm->local); | |
676 | } | |
677 | ||
678 | static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len) | |
679 | { | |
680 | cm->local= simple_strtol(buf, NULL, 0); | |
681 | if (cm->local && !local_comm) | |
682 | local_comm = cm; | |
683 | return len; | |
684 | } | |
685 | ||
686 | static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len) | |
687 | { | |
688 | struct sockaddr_storage *addr; | |
689 | ||
690 | if (len != sizeof(struct sockaddr_storage)) | |
691 | return -EINVAL; | |
692 | ||
693 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) | |
694 | return -ENOSPC; | |
695 | ||
696 | addr = kzalloc(sizeof(*addr), GFP_KERNEL); | |
697 | if (!addr) | |
698 | return -ENOMEM; | |
699 | ||
700 | memcpy(addr, buf, len); | |
701 | cm->addr[cm->addr_count++] = addr; | |
702 | return len; | |
703 | } | |
704 | ||
705 | static ssize_t show_node(struct config_item *i, struct configfs_attribute *a, | |
706 | char *buf) | |
707 | { | |
708 | struct node *nd = to_node(i); | |
709 | struct node_attribute *nda = | |
710 | container_of(a, struct node_attribute, attr); | |
711 | return nda->show ? nda->show(nd, buf) : 0; | |
712 | } | |
713 | ||
714 | static ssize_t store_node(struct config_item *i, struct configfs_attribute *a, | |
715 | const char *buf, size_t len) | |
716 | { | |
717 | struct node *nd = to_node(i); | |
718 | struct node_attribute *nda = | |
719 | container_of(a, struct node_attribute, attr); | |
720 | return nda->store ? nda->store(nd, buf, len) : -EINVAL; | |
721 | } | |
722 | ||
723 | static ssize_t node_nodeid_read(struct node *nd, char *buf) | |
724 | { | |
725 | return sprintf(buf, "%d\n", nd->nodeid); | |
726 | } | |
727 | ||
728 | static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len) | |
729 | { | |
730 | nd->nodeid = simple_strtol(buf, NULL, 0); | |
731 | return len; | |
732 | } | |
733 | ||
734 | static ssize_t node_weight_read(struct node *nd, char *buf) | |
735 | { | |
736 | return sprintf(buf, "%d\n", nd->weight); | |
737 | } | |
738 | ||
739 | static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len) | |
740 | { | |
741 | nd->weight = simple_strtol(buf, NULL, 0); | |
742 | return len; | |
743 | } | |
744 | ||
745 | /* | |
746 | * Functions for the dlm to get the info that's been configured | |
747 | */ | |
748 | ||
749 | static struct space *get_space(char *name) | |
750 | { | |
3168b078 SS |
751 | struct config_item *i; |
752 | ||
e7fd4179 DT |
753 | if (!space_list) |
754 | return NULL; | |
3168b078 SS |
755 | |
756 | down(&space_list->cg_subsys->su_sem); | |
757 | i = config_group_find_obj(space_list, name); | |
758 | up(&space_list->cg_subsys->su_sem); | |
759 | ||
760 | return to_space(i); | |
e7fd4179 DT |
761 | } |
762 | ||
763 | static void put_space(struct space *sp) | |
764 | { | |
765 | config_item_put(&sp->group.cg_item); | |
766 | } | |
767 | ||
768 | static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr) | |
769 | { | |
770 | struct config_item *i; | |
771 | struct comm *cm = NULL; | |
772 | int found = 0; | |
773 | ||
774 | if (!comm_list) | |
775 | return NULL; | |
776 | ||
777 | down(&clusters_root.subsys.su_sem); | |
778 | ||
779 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { | |
780 | cm = to_comm(i); | |
781 | ||
782 | if (nodeid) { | |
783 | if (cm->nodeid != nodeid) | |
784 | continue; | |
785 | found = 1; | |
3168b078 | 786 | config_item_get(i); |
e7fd4179 DT |
787 | break; |
788 | } else { | |
789 | if (!cm->addr_count || | |
790 | memcmp(cm->addr[0], addr, sizeof(*addr))) | |
791 | continue; | |
792 | found = 1; | |
3168b078 | 793 | config_item_get(i); |
e7fd4179 DT |
794 | break; |
795 | } | |
796 | } | |
797 | up(&clusters_root.subsys.su_sem); | |
798 | ||
3168b078 | 799 | if (!found) |
e7fd4179 DT |
800 | cm = NULL; |
801 | return cm; | |
802 | } | |
803 | ||
804 | static void put_comm(struct comm *cm) | |
805 | { | |
806 | config_item_put(&cm->item); | |
807 | } | |
808 | ||
809 | /* caller must free mem */ | |
810 | int dlm_nodeid_list(char *lsname, int **ids_out) | |
811 | { | |
812 | struct space *sp; | |
813 | struct node *nd; | |
814 | int i = 0, rv = 0; | |
815 | int *ids; | |
816 | ||
817 | sp = get_space(lsname); | |
818 | if (!sp) | |
819 | return -EEXIST; | |
820 | ||
90135925 | 821 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
822 | if (!sp->members_count) { |
823 | rv = 0; | |
824 | goto out; | |
825 | } | |
826 | ||
827 | ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL); | |
828 | if (!ids) { | |
829 | rv = -ENOMEM; | |
830 | goto out; | |
831 | } | |
832 | ||
833 | rv = sp->members_count; | |
834 | list_for_each_entry(nd, &sp->members, list) | |
835 | ids[i++] = nd->nodeid; | |
836 | ||
837 | if (rv != i) | |
838 | printk("bad nodeid count %d %d\n", rv, i); | |
839 | ||
840 | *ids_out = ids; | |
841 | out: | |
90135925 | 842 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
843 | put_space(sp); |
844 | return rv; | |
845 | } | |
846 | ||
847 | int dlm_node_weight(char *lsname, int nodeid) | |
848 | { | |
849 | struct space *sp; | |
850 | struct node *nd; | |
851 | int w = -EEXIST; | |
852 | ||
853 | sp = get_space(lsname); | |
854 | if (!sp) | |
855 | goto out; | |
856 | ||
90135925 | 857 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
858 | list_for_each_entry(nd, &sp->members, list) { |
859 | if (nd->nodeid != nodeid) | |
860 | continue; | |
861 | w = nd->weight; | |
862 | break; | |
863 | } | |
90135925 | 864 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
865 | put_space(sp); |
866 | out: | |
867 | return w; | |
868 | } | |
869 | ||
870 | int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr) | |
871 | { | |
872 | struct comm *cm = get_comm(nodeid, NULL); | |
873 | if (!cm) | |
874 | return -EEXIST; | |
875 | if (!cm->addr_count) | |
876 | return -ENOENT; | |
877 | memcpy(addr, cm->addr[0], sizeof(*addr)); | |
878 | put_comm(cm); | |
879 | return 0; | |
880 | } | |
881 | ||
882 | int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid) | |
883 | { | |
884 | struct comm *cm = get_comm(0, addr); | |
885 | if (!cm) | |
886 | return -EEXIST; | |
887 | *nodeid = cm->nodeid; | |
888 | put_comm(cm); | |
889 | return 0; | |
890 | } | |
891 | ||
892 | int dlm_our_nodeid(void) | |
893 | { | |
894 | return local_comm ? local_comm->nodeid : 0; | |
895 | } | |
896 | ||
897 | /* num 0 is first addr, num 1 is second addr */ | |
898 | int dlm_our_addr(struct sockaddr_storage *addr, int num) | |
899 | { | |
900 | if (!local_comm) | |
901 | return -1; | |
902 | if (num + 1 > local_comm->addr_count) | |
903 | return -1; | |
904 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | /* Config file defaults */ | |
909 | #define DEFAULT_TCP_PORT 21064 | |
910 | #define DEFAULT_BUFFER_SIZE 4096 | |
911 | #define DEFAULT_RSBTBL_SIZE 256 | |
912 | #define DEFAULT_LKBTBL_SIZE 1024 | |
913 | #define DEFAULT_DIRTBL_SIZE 512 | |
914 | #define DEFAULT_RECOVER_TIMER 5 | |
915 | #define DEFAULT_TOSS_SECS 10 | |
916 | #define DEFAULT_SCAN_SECS 5 | |
99fc6487 | 917 | #define DEFAULT_LOG_DEBUG 0 |
6ed7257b | 918 | #define DEFAULT_PROTOCOL 0 |
e7fd4179 DT |
919 | |
920 | struct dlm_config_info dlm_config = { | |
68c817a1 DT |
921 | .ci_tcp_port = DEFAULT_TCP_PORT, |
922 | .ci_buffer_size = DEFAULT_BUFFER_SIZE, | |
923 | .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, | |
924 | .ci_lkbtbl_size = DEFAULT_LKBTBL_SIZE, | |
925 | .ci_dirtbl_size = DEFAULT_DIRTBL_SIZE, | |
926 | .ci_recover_timer = DEFAULT_RECOVER_TIMER, | |
927 | .ci_toss_secs = DEFAULT_TOSS_SECS, | |
99fc6487 | 928 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
6ed7257b PC |
929 | .ci_log_debug = DEFAULT_LOG_DEBUG, |
930 | .ci_protocol = DEFAULT_PROTOCOL | |
e7fd4179 DT |
931 | }; |
932 |