Commit | Line | Data |
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e7fd4179 DT |
1 | /****************************************************************************** |
2 | ******************************************************************************* | |
3 | ** | |
4 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
60f98d18 | 5 | ** Copyright (C) 2004-2011 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> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
44be6fdf DT |
18 | #include <linux/in.h> |
19 | #include <linux/in6.h> | |
60f98d18 | 20 | #include <linux/dlmconstants.h> |
44be6fdf | 21 | #include <net/ipv6.h> |
e7fd4179 DT |
22 | #include <net/sock.h> |
23 | ||
24 | #include "config.h" | |
1c032c03 | 25 | #include "lowcomms.h" |
e7fd4179 DT |
26 | |
27 | /* | |
28 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid | |
29 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight | |
30 | * /config/dlm/<cluster>/comms/<comm>/nodeid | |
31 | * /config/dlm/<cluster>/comms/<comm>/local | |
55b3286d MY |
32 | * /config/dlm/<cluster>/comms/<comm>/addr (write only) |
33 | * /config/dlm/<cluster>/comms/<comm>/addr_list (read only) | |
e7fd4179 DT |
34 | * The <cluster> level is useless, but I haven't figured out how to avoid it. |
35 | */ | |
36 | ||
37 | static struct config_group *space_list; | |
38 | static struct config_group *comm_list; | |
51409340 | 39 | static struct dlm_comm *local_comm; |
60f98d18 | 40 | static uint32_t dlm_comm_count; |
e7fd4179 | 41 | |
51409340 DT |
42 | struct dlm_clusters; |
43 | struct dlm_cluster; | |
44 | struct dlm_spaces; | |
45 | struct dlm_space; | |
46 | struct dlm_comms; | |
47 | struct dlm_comm; | |
48 | struct dlm_nodes; | |
49 | struct dlm_node; | |
e7fd4179 | 50 | |
f89ab861 | 51 | static struct config_group *make_cluster(struct config_group *, const char *); |
e7fd4179 DT |
52 | static void drop_cluster(struct config_group *, struct config_item *); |
53 | static void release_cluster(struct config_item *); | |
f89ab861 | 54 | static struct config_group *make_space(struct config_group *, const char *); |
e7fd4179 DT |
55 | static void drop_space(struct config_group *, struct config_item *); |
56 | static void release_space(struct config_item *); | |
f89ab861 | 57 | static struct config_item *make_comm(struct config_group *, const char *); |
e7fd4179 DT |
58 | static void drop_comm(struct config_group *, struct config_item *); |
59 | static void release_comm(struct config_item *); | |
f89ab861 | 60 | static struct config_item *make_node(struct config_group *, const char *); |
e7fd4179 DT |
61 | static void drop_node(struct config_group *, struct config_item *); |
62 | static void release_node(struct config_item *); | |
63 | ||
9ae0f367 CH |
64 | static struct configfs_attribute *comm_attrs[]; |
65 | static struct configfs_attribute *node_attrs[]; | |
51409340 DT |
66 | |
67 | struct dlm_cluster { | |
d200778e DT |
68 | struct config_group group; |
69 | unsigned int cl_tcp_port; | |
70 | unsigned int cl_buffer_size; | |
71 | unsigned int cl_rsbtbl_size; | |
d200778e DT |
72 | unsigned int cl_recover_timer; |
73 | unsigned int cl_toss_secs; | |
74 | unsigned int cl_scan_secs; | |
75 | unsigned int cl_log_debug; | |
6ed7257b | 76 | unsigned int cl_protocol; |
3ae1acf9 | 77 | unsigned int cl_timewarn_cs; |
c6ff669b | 78 | unsigned int cl_waitwarn_us; |
3881ac04 | 79 | unsigned int cl_new_rsb_count; |
60f98d18 DT |
80 | unsigned int cl_recover_callbacks; |
81 | char cl_cluster_name[DLM_LOCKSPACE_LEN]; | |
d200778e DT |
82 | }; |
83 | ||
9ae0f367 CH |
84 | static struct dlm_cluster *config_item_to_cluster(struct config_item *i) |
85 | { | |
86 | return i ? container_of(to_config_group(i), struct dlm_cluster, group) : | |
87 | NULL; | |
88 | } | |
89 | ||
d200778e DT |
90 | enum { |
91 | CLUSTER_ATTR_TCP_PORT = 0, | |
92 | CLUSTER_ATTR_BUFFER_SIZE, | |
93 | CLUSTER_ATTR_RSBTBL_SIZE, | |
d200778e DT |
94 | CLUSTER_ATTR_RECOVER_TIMER, |
95 | CLUSTER_ATTR_TOSS_SECS, | |
96 | CLUSTER_ATTR_SCAN_SECS, | |
97 | CLUSTER_ATTR_LOG_DEBUG, | |
6ed7257b | 98 | CLUSTER_ATTR_PROTOCOL, |
3ae1acf9 | 99 | CLUSTER_ATTR_TIMEWARN_CS, |
c6ff669b | 100 | CLUSTER_ATTR_WAITWARN_US, |
3881ac04 | 101 | CLUSTER_ATTR_NEW_RSB_COUNT, |
60f98d18 DT |
102 | CLUSTER_ATTR_RECOVER_CALLBACKS, |
103 | CLUSTER_ATTR_CLUSTER_NAME, | |
d200778e DT |
104 | }; |
105 | ||
9ae0f367 | 106 | static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf) |
60f98d18 | 107 | { |
9ae0f367 | 108 | struct dlm_cluster *cl = config_item_to_cluster(item); |
60f98d18 DT |
109 | return sprintf(buf, "%s\n", cl->cl_cluster_name); |
110 | } | |
111 | ||
9ae0f367 | 112 | static ssize_t cluster_cluster_name_store(struct config_item *item, |
60f98d18 DT |
113 | const char *buf, size_t len) |
114 | { | |
9ae0f367 CH |
115 | struct dlm_cluster *cl = config_item_to_cluster(item); |
116 | ||
ad917e7f ZH |
117 | strlcpy(dlm_config.ci_cluster_name, buf, |
118 | sizeof(dlm_config.ci_cluster_name)); | |
119 | strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name)); | |
60f98d18 DT |
120 | return len; |
121 | } | |
122 | ||
9ae0f367 | 123 | CONFIGFS_ATTR(cluster_, cluster_name); |
60f98d18 | 124 | |
51409340 | 125 | static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field, |
5416b704 | 126 | int *info_field, int check_zero, |
d200778e DT |
127 | const char *buf, size_t len) |
128 | { | |
129 | unsigned int x; | |
4f4c337f | 130 | int rc; |
d200778e DT |
131 | |
132 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 133 | return -EPERM; |
4f4c337f FF |
134 | rc = kstrtouint(buf, 0, &x); |
135 | if (rc) | |
136 | return rc; | |
d200778e DT |
137 | |
138 | if (check_zero && !x) | |
139 | return -EINVAL; | |
140 | ||
141 | *cl_field = x; | |
142 | *info_field = x; | |
143 | ||
144 | return len; | |
145 | } | |
146 | ||
d200778e | 147 | #define CLUSTER_ATTR(name, check_zero) \ |
9ae0f367 CH |
148 | static ssize_t cluster_##name##_store(struct config_item *item, \ |
149 | const char *buf, size_t len) \ | |
d200778e | 150 | { \ |
9ae0f367 | 151 | struct dlm_cluster *cl = config_item_to_cluster(item); \ |
d200778e DT |
152 | return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ |
153 | check_zero, buf, len); \ | |
154 | } \ | |
9ae0f367 | 155 | static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \ |
d200778e | 156 | { \ |
9ae0f367 | 157 | struct dlm_cluster *cl = config_item_to_cluster(item); \ |
d200778e DT |
158 | return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ |
159 | } \ | |
9ae0f367 | 160 | CONFIGFS_ATTR(cluster_, name); |
d200778e DT |
161 | |
162 | CLUSTER_ATTR(tcp_port, 1); | |
163 | CLUSTER_ATTR(buffer_size, 1); | |
164 | CLUSTER_ATTR(rsbtbl_size, 1); | |
d200778e DT |
165 | CLUSTER_ATTR(recover_timer, 1); |
166 | CLUSTER_ATTR(toss_secs, 1); | |
167 | CLUSTER_ATTR(scan_secs, 1); | |
168 | CLUSTER_ATTR(log_debug, 0); | |
6ed7257b | 169 | CLUSTER_ATTR(protocol, 0); |
3ae1acf9 | 170 | CLUSTER_ATTR(timewarn_cs, 1); |
c6ff669b | 171 | CLUSTER_ATTR(waitwarn_us, 0); |
3881ac04 | 172 | CLUSTER_ATTR(new_rsb_count, 0); |
60f98d18 | 173 | CLUSTER_ATTR(recover_callbacks, 0); |
d200778e DT |
174 | |
175 | static struct configfs_attribute *cluster_attrs[] = { | |
9ae0f367 CH |
176 | [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, |
177 | [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, | |
178 | [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, | |
179 | [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, | |
180 | [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, | |
181 | [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, | |
182 | [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, | |
183 | [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, | |
184 | [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs, | |
185 | [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us, | |
186 | [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, | |
187 | [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, | |
188 | [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, | |
d200778e DT |
189 | NULL, |
190 | }; | |
191 | ||
e7fd4179 DT |
192 | enum { |
193 | COMM_ATTR_NODEID = 0, | |
194 | COMM_ATTR_LOCAL, | |
195 | COMM_ATTR_ADDR, | |
55b3286d | 196 | COMM_ATTR_ADDR_LIST, |
e7fd4179 DT |
197 | }; |
198 | ||
e7fd4179 DT |
199 | enum { |
200 | NODE_ATTR_NODEID = 0, | |
201 | NODE_ATTR_WEIGHT, | |
202 | }; | |
203 | ||
51409340 | 204 | struct dlm_clusters { |
e7fd4179 DT |
205 | struct configfs_subsystem subsys; |
206 | }; | |
207 | ||
51409340 | 208 | struct dlm_spaces { |
e7fd4179 DT |
209 | struct config_group ss_group; |
210 | }; | |
211 | ||
51409340 | 212 | struct dlm_space { |
e7fd4179 DT |
213 | struct config_group group; |
214 | struct list_head members; | |
90135925 | 215 | struct mutex members_lock; |
e7fd4179 DT |
216 | int members_count; |
217 | }; | |
218 | ||
51409340 | 219 | struct dlm_comms { |
e7fd4179 DT |
220 | struct config_group cs_group; |
221 | }; | |
222 | ||
51409340 | 223 | struct dlm_comm { |
e7fd4179 | 224 | struct config_item item; |
60f98d18 | 225 | int seq; |
e7fd4179 DT |
226 | int nodeid; |
227 | int local; | |
228 | int addr_count; | |
229 | struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; | |
230 | }; | |
231 | ||
51409340 | 232 | struct dlm_nodes { |
e7fd4179 DT |
233 | struct config_group ns_group; |
234 | }; | |
235 | ||
51409340 | 236 | struct dlm_node { |
e7fd4179 DT |
237 | struct config_item item; |
238 | struct list_head list; /* space->members */ | |
239 | int nodeid; | |
240 | int weight; | |
d44e0fc7 | 241 | int new; |
60f98d18 | 242 | int comm_seq; /* copy of cm->seq when nd->nodeid is set */ |
e7fd4179 DT |
243 | }; |
244 | ||
245 | static struct configfs_group_operations clusters_ops = { | |
246 | .make_group = make_cluster, | |
247 | .drop_item = drop_cluster, | |
248 | }; | |
249 | ||
250 | static struct configfs_item_operations cluster_ops = { | |
251 | .release = release_cluster, | |
252 | }; | |
253 | ||
254 | static struct configfs_group_operations spaces_ops = { | |
255 | .make_group = make_space, | |
256 | .drop_item = drop_space, | |
257 | }; | |
258 | ||
259 | static struct configfs_item_operations space_ops = { | |
260 | .release = release_space, | |
261 | }; | |
262 | ||
263 | static struct configfs_group_operations comms_ops = { | |
264 | .make_item = make_comm, | |
265 | .drop_item = drop_comm, | |
266 | }; | |
267 | ||
268 | static struct configfs_item_operations comm_ops = { | |
269 | .release = release_comm, | |
e7fd4179 DT |
270 | }; |
271 | ||
272 | static struct configfs_group_operations nodes_ops = { | |
273 | .make_item = make_node, | |
274 | .drop_item = drop_node, | |
275 | }; | |
276 | ||
277 | static struct configfs_item_operations node_ops = { | |
278 | .release = release_node, | |
e7fd4179 DT |
279 | }; |
280 | ||
281 | static struct config_item_type clusters_type = { | |
282 | .ct_group_ops = &clusters_ops, | |
283 | .ct_owner = THIS_MODULE, | |
284 | }; | |
285 | ||
286 | static struct config_item_type cluster_type = { | |
287 | .ct_item_ops = &cluster_ops, | |
d200778e | 288 | .ct_attrs = cluster_attrs, |
e7fd4179 DT |
289 | .ct_owner = THIS_MODULE, |
290 | }; | |
291 | ||
292 | static struct config_item_type spaces_type = { | |
293 | .ct_group_ops = &spaces_ops, | |
294 | .ct_owner = THIS_MODULE, | |
295 | }; | |
296 | ||
297 | static struct config_item_type space_type = { | |
298 | .ct_item_ops = &space_ops, | |
299 | .ct_owner = THIS_MODULE, | |
300 | }; | |
301 | ||
302 | static struct config_item_type comms_type = { | |
303 | .ct_group_ops = &comms_ops, | |
304 | .ct_owner = THIS_MODULE, | |
305 | }; | |
306 | ||
307 | static struct config_item_type comm_type = { | |
308 | .ct_item_ops = &comm_ops, | |
309 | .ct_attrs = comm_attrs, | |
310 | .ct_owner = THIS_MODULE, | |
311 | }; | |
312 | ||
313 | static struct config_item_type nodes_type = { | |
314 | .ct_group_ops = &nodes_ops, | |
315 | .ct_owner = THIS_MODULE, | |
316 | }; | |
317 | ||
318 | static struct config_item_type node_type = { | |
319 | .ct_item_ops = &node_ops, | |
320 | .ct_attrs = node_attrs, | |
321 | .ct_owner = THIS_MODULE, | |
322 | }; | |
323 | ||
27eccf46 | 324 | static struct dlm_space *config_item_to_space(struct config_item *i) |
e7fd4179 | 325 | { |
51409340 DT |
326 | return i ? container_of(to_config_group(i), struct dlm_space, group) : |
327 | NULL; | |
e7fd4179 DT |
328 | } |
329 | ||
27eccf46 | 330 | static struct dlm_comm *config_item_to_comm(struct config_item *i) |
e7fd4179 | 331 | { |
51409340 | 332 | return i ? container_of(i, struct dlm_comm, item) : NULL; |
e7fd4179 DT |
333 | } |
334 | ||
27eccf46 | 335 | static struct dlm_node *config_item_to_node(struct config_item *i) |
e7fd4179 | 336 | { |
51409340 | 337 | return i ? container_of(i, struct dlm_node, item) : NULL; |
e7fd4179 DT |
338 | } |
339 | ||
f89ab861 JB |
340 | static struct config_group *make_cluster(struct config_group *g, |
341 | const char *name) | |
e7fd4179 | 342 | { |
51409340 DT |
343 | struct dlm_cluster *cl = NULL; |
344 | struct dlm_spaces *sps = NULL; | |
345 | struct dlm_comms *cms = NULL; | |
e7fd4179 DT |
346 | void *gps = NULL; |
347 | ||
573c24c4 DT |
348 | cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); |
349 | gps = kcalloc(3, sizeof(struct config_group *), GFP_NOFS); | |
350 | sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); | |
351 | cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); | |
e7fd4179 DT |
352 | |
353 | if (!cl || !gps || !sps || !cms) | |
354 | goto fail; | |
355 | ||
356 | config_group_init_type_name(&cl->group, name, &cluster_type); | |
357 | config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); | |
358 | config_group_init_type_name(&cms->cs_group, "comms", &comms_type); | |
359 | ||
360 | cl->group.default_groups = gps; | |
361 | cl->group.default_groups[0] = &sps->ss_group; | |
362 | cl->group.default_groups[1] = &cms->cs_group; | |
363 | cl->group.default_groups[2] = NULL; | |
364 | ||
d200778e DT |
365 | cl->cl_tcp_port = dlm_config.ci_tcp_port; |
366 | cl->cl_buffer_size = dlm_config.ci_buffer_size; | |
367 | cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; | |
d200778e DT |
368 | cl->cl_recover_timer = dlm_config.ci_recover_timer; |
369 | cl->cl_toss_secs = dlm_config.ci_toss_secs; | |
370 | cl->cl_scan_secs = dlm_config.ci_scan_secs; | |
371 | cl->cl_log_debug = dlm_config.ci_log_debug; | |
0b7cac0f | 372 | cl->cl_protocol = dlm_config.ci_protocol; |
84d8cd69 | 373 | cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs; |
c6ff669b | 374 | cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us; |
3881ac04 | 375 | cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; |
60f98d18 DT |
376 | cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; |
377 | memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, | |
378 | DLM_LOCKSPACE_LEN); | |
d200778e | 379 | |
e7fd4179 DT |
380 | space_list = &sps->ss_group; |
381 | comm_list = &cms->cs_group; | |
f89ab861 | 382 | return &cl->group; |
e7fd4179 DT |
383 | |
384 | fail: | |
385 | kfree(cl); | |
386 | kfree(gps); | |
387 | kfree(sps); | |
388 | kfree(cms); | |
a6795e9e | 389 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
390 | } |
391 | ||
392 | static void drop_cluster(struct config_group *g, struct config_item *i) | |
393 | { | |
27eccf46 | 394 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 DT |
395 | struct config_item *tmp; |
396 | int j; | |
397 | ||
398 | for (j = 0; cl->group.default_groups[j]; j++) { | |
399 | tmp = &cl->group.default_groups[j]->cg_item; | |
400 | cl->group.default_groups[j] = NULL; | |
401 | config_item_put(tmp); | |
402 | } | |
403 | ||
404 | space_list = NULL; | |
405 | comm_list = NULL; | |
406 | ||
407 | config_item_put(i); | |
408 | } | |
409 | ||
410 | static void release_cluster(struct config_item *i) | |
411 | { | |
27eccf46 | 412 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 DT |
413 | kfree(cl->group.default_groups); |
414 | kfree(cl); | |
415 | } | |
416 | ||
f89ab861 | 417 | static struct config_group *make_space(struct config_group *g, const char *name) |
e7fd4179 | 418 | { |
51409340 DT |
419 | struct dlm_space *sp = NULL; |
420 | struct dlm_nodes *nds = NULL; | |
e7fd4179 DT |
421 | void *gps = NULL; |
422 | ||
573c24c4 DT |
423 | sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); |
424 | gps = kcalloc(2, sizeof(struct config_group *), GFP_NOFS); | |
425 | nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); | |
e7fd4179 DT |
426 | |
427 | if (!sp || !gps || !nds) | |
428 | goto fail; | |
429 | ||
430 | config_group_init_type_name(&sp->group, name, &space_type); | |
431 | config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); | |
432 | ||
433 | sp->group.default_groups = gps; | |
434 | sp->group.default_groups[0] = &nds->ns_group; | |
435 | sp->group.default_groups[1] = NULL; | |
436 | ||
437 | INIT_LIST_HEAD(&sp->members); | |
90135925 | 438 | mutex_init(&sp->members_lock); |
e7fd4179 | 439 | sp->members_count = 0; |
f89ab861 | 440 | return &sp->group; |
e7fd4179 DT |
441 | |
442 | fail: | |
443 | kfree(sp); | |
444 | kfree(gps); | |
445 | kfree(nds); | |
a6795e9e | 446 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
447 | } |
448 | ||
449 | static void drop_space(struct config_group *g, struct config_item *i) | |
450 | { | |
27eccf46 | 451 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
452 | struct config_item *tmp; |
453 | int j; | |
454 | ||
455 | /* assert list_empty(&sp->members) */ | |
456 | ||
457 | for (j = 0; sp->group.default_groups[j]; j++) { | |
458 | tmp = &sp->group.default_groups[j]->cg_item; | |
459 | sp->group.default_groups[j] = NULL; | |
460 | config_item_put(tmp); | |
461 | } | |
462 | ||
463 | config_item_put(i); | |
464 | } | |
465 | ||
466 | static void release_space(struct config_item *i) | |
467 | { | |
27eccf46 | 468 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
469 | kfree(sp->group.default_groups); |
470 | kfree(sp); | |
471 | } | |
472 | ||
f89ab861 | 473 | static struct config_item *make_comm(struct config_group *g, const char *name) |
e7fd4179 | 474 | { |
51409340 | 475 | struct dlm_comm *cm; |
e7fd4179 | 476 | |
573c24c4 | 477 | cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); |
e7fd4179 | 478 | if (!cm) |
a6795e9e | 479 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
480 | |
481 | config_item_init_type_name(&cm->item, name, &comm_type); | |
60f98d18 DT |
482 | |
483 | cm->seq = dlm_comm_count++; | |
484 | if (!cm->seq) | |
485 | cm->seq = dlm_comm_count++; | |
486 | ||
e7fd4179 DT |
487 | cm->nodeid = -1; |
488 | cm->local = 0; | |
489 | cm->addr_count = 0; | |
f89ab861 | 490 | return &cm->item; |
e7fd4179 DT |
491 | } |
492 | ||
493 | static void drop_comm(struct config_group *g, struct config_item *i) | |
494 | { | |
27eccf46 | 495 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
496 | if (local_comm == cm) |
497 | local_comm = NULL; | |
1c032c03 | 498 | dlm_lowcomms_close(cm->nodeid); |
e7fd4179 DT |
499 | while (cm->addr_count--) |
500 | kfree(cm->addr[cm->addr_count]); | |
501 | config_item_put(i); | |
502 | } | |
503 | ||
504 | static void release_comm(struct config_item *i) | |
505 | { | |
27eccf46 | 506 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
507 | kfree(cm); |
508 | } | |
509 | ||
f89ab861 | 510 | static struct config_item *make_node(struct config_group *g, const char *name) |
e7fd4179 | 511 | { |
27eccf46 | 512 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
51409340 | 513 | struct dlm_node *nd; |
e7fd4179 | 514 | |
573c24c4 | 515 | nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); |
e7fd4179 | 516 | if (!nd) |
a6795e9e | 517 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
518 | |
519 | config_item_init_type_name(&nd->item, name, &node_type); | |
520 | nd->nodeid = -1; | |
521 | nd->weight = 1; /* default weight of 1 if none is set */ | |
d44e0fc7 | 522 | nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ |
e7fd4179 | 523 | |
90135925 | 524 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
525 | list_add(&nd->list, &sp->members); |
526 | sp->members_count++; | |
90135925 | 527 | mutex_unlock(&sp->members_lock); |
e7fd4179 | 528 | |
f89ab861 | 529 | return &nd->item; |
e7fd4179 DT |
530 | } |
531 | ||
532 | static void drop_node(struct config_group *g, struct config_item *i) | |
533 | { | |
27eccf46 AM |
534 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
535 | struct dlm_node *nd = config_item_to_node(i); | |
e7fd4179 | 536 | |
90135925 | 537 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
538 | list_del(&nd->list); |
539 | sp->members_count--; | |
90135925 | 540 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
541 | |
542 | config_item_put(i); | |
543 | } | |
544 | ||
545 | static void release_node(struct config_item *i) | |
546 | { | |
27eccf46 | 547 | struct dlm_node *nd = config_item_to_node(i); |
e7fd4179 DT |
548 | kfree(nd); |
549 | } | |
550 | ||
51409340 | 551 | static struct dlm_clusters clusters_root = { |
e7fd4179 DT |
552 | .subsys = { |
553 | .su_group = { | |
554 | .cg_item = { | |
555 | .ci_namebuf = "dlm", | |
556 | .ci_type = &clusters_type, | |
557 | }, | |
558 | }, | |
559 | }, | |
560 | }; | |
561 | ||
30727174 | 562 | int __init dlm_config_init(void) |
e7fd4179 DT |
563 | { |
564 | config_group_init(&clusters_root.subsys.su_group); | |
e6bd07ae | 565 | mutex_init(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
566 | return configfs_register_subsystem(&clusters_root.subsys); |
567 | } | |
568 | ||
569 | void dlm_config_exit(void) | |
570 | { | |
571 | configfs_unregister_subsystem(&clusters_root.subsys); | |
572 | } | |
573 | ||
574 | /* | |
575 | * Functions for user space to read/write attributes | |
576 | */ | |
577 | ||
9ae0f367 | 578 | static ssize_t comm_nodeid_show(struct config_item *item, char *buf) |
d200778e | 579 | { |
9ae0f367 | 580 | return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); |
e7fd4179 DT |
581 | } |
582 | ||
9ae0f367 | 583 | static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 584 | size_t len) |
e7fd4179 | 585 | { |
9ae0f367 | 586 | int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); |
4f4c337f FF |
587 | |
588 | if (rc) | |
589 | return rc; | |
e7fd4179 DT |
590 | return len; |
591 | } | |
592 | ||
9ae0f367 | 593 | static ssize_t comm_local_show(struct config_item *item, char *buf) |
e7fd4179 | 594 | { |
9ae0f367 | 595 | return sprintf(buf, "%d\n", config_item_to_comm(item)->local); |
e7fd4179 DT |
596 | } |
597 | ||
9ae0f367 | 598 | static ssize_t comm_local_store(struct config_item *item, const char *buf, |
51409340 | 599 | size_t len) |
e7fd4179 | 600 | { |
9ae0f367 | 601 | struct dlm_comm *cm = config_item_to_comm(item); |
4f4c337f FF |
602 | int rc = kstrtoint(buf, 0, &cm->local); |
603 | ||
604 | if (rc) | |
605 | return rc; | |
e7fd4179 DT |
606 | if (cm->local && !local_comm) |
607 | local_comm = cm; | |
608 | return len; | |
609 | } | |
610 | ||
9ae0f367 CH |
611 | static ssize_t comm_addr_store(struct config_item *item, const char *buf, |
612 | size_t len) | |
e7fd4179 | 613 | { |
9ae0f367 | 614 | struct dlm_comm *cm = config_item_to_comm(item); |
e7fd4179 | 615 | struct sockaddr_storage *addr; |
36b71a8b | 616 | int rv; |
e7fd4179 DT |
617 | |
618 | if (len != sizeof(struct sockaddr_storage)) | |
619 | return -EINVAL; | |
620 | ||
621 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) | |
622 | return -ENOSPC; | |
623 | ||
573c24c4 | 624 | addr = kzalloc(sizeof(*addr), GFP_NOFS); |
e7fd4179 DT |
625 | if (!addr) |
626 | return -ENOMEM; | |
627 | ||
628 | memcpy(addr, buf, len); | |
36b71a8b DT |
629 | |
630 | rv = dlm_lowcomms_addr(cm->nodeid, addr, len); | |
631 | if (rv) { | |
632 | kfree(addr); | |
633 | return rv; | |
634 | } | |
635 | ||
e7fd4179 DT |
636 | cm->addr[cm->addr_count++] = addr; |
637 | return len; | |
638 | } | |
639 | ||
9ae0f367 | 640 | static ssize_t comm_addr_list_show(struct config_item *item, char *buf) |
55b3286d | 641 | { |
9ae0f367 | 642 | struct dlm_comm *cm = config_item_to_comm(item); |
55b3286d MY |
643 | ssize_t s; |
644 | ssize_t allowance; | |
645 | int i; | |
646 | struct sockaddr_storage *addr; | |
647 | struct sockaddr_in *addr_in; | |
648 | struct sockaddr_in6 *addr_in6; | |
649 | ||
650 | /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ | |
651 | char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; | |
652 | ||
653 | ||
654 | /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ | |
655 | allowance = 4096; | |
656 | buf[0] = '\0'; | |
657 | ||
658 | for (i = 0; i < cm->addr_count; i++) { | |
659 | addr = cm->addr[i]; | |
660 | ||
661 | switch(addr->ss_family) { | |
662 | case AF_INET: | |
663 | addr_in = (struct sockaddr_in *)addr; | |
664 | s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); | |
665 | break; | |
666 | case AF_INET6: | |
667 | addr_in6 = (struct sockaddr_in6 *)addr; | |
668 | s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); | |
669 | break; | |
670 | default: | |
671 | s = sprintf(buf0, "%s\n", "<UNKNOWN>"); | |
672 | break; | |
673 | } | |
674 | allowance -= s; | |
675 | if (allowance >= 0) | |
676 | strcat(buf, buf0); | |
677 | else { | |
678 | allowance += s; | |
679 | break; | |
680 | } | |
681 | } | |
682 | return 4096 - allowance; | |
683 | } | |
684 | ||
9ae0f367 CH |
685 | CONFIGFS_ATTR(comm_, nodeid); |
686 | CONFIGFS_ATTR(comm_, local); | |
687 | CONFIGFS_ATTR_WO(comm_, addr); | |
688 | CONFIGFS_ATTR_RO(comm_, addr_list); | |
e7fd4179 | 689 | |
9ae0f367 CH |
690 | static struct configfs_attribute *comm_attrs[] = { |
691 | [COMM_ATTR_NODEID] = &comm_attr_nodeid, | |
692 | [COMM_ATTR_LOCAL] = &comm_attr_local, | |
693 | [COMM_ATTR_ADDR] = &comm_attr_addr, | |
694 | [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, | |
695 | NULL, | |
696 | }; | |
e7fd4179 | 697 | |
9ae0f367 | 698 | static ssize_t node_nodeid_show(struct config_item *item, char *buf) |
e7fd4179 | 699 | { |
9ae0f367 | 700 | return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); |
e7fd4179 DT |
701 | } |
702 | ||
9ae0f367 | 703 | static ssize_t node_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 704 | size_t len) |
e7fd4179 | 705 | { |
9ae0f367 | 706 | struct dlm_node *nd = config_item_to_node(item); |
60f98d18 | 707 | uint32_t seq = 0; |
4f4c337f FF |
708 | int rc = kstrtoint(buf, 0, &nd->nodeid); |
709 | ||
710 | if (rc) | |
711 | return rc; | |
60f98d18 DT |
712 | dlm_comm_seq(nd->nodeid, &seq); |
713 | nd->comm_seq = seq; | |
e7fd4179 DT |
714 | return len; |
715 | } | |
716 | ||
9ae0f367 | 717 | static ssize_t node_weight_show(struct config_item *item, char *buf) |
e7fd4179 | 718 | { |
9ae0f367 | 719 | return sprintf(buf, "%d\n", config_item_to_node(item)->weight); |
e7fd4179 DT |
720 | } |
721 | ||
9ae0f367 | 722 | static ssize_t node_weight_store(struct config_item *item, const char *buf, |
51409340 | 723 | size_t len) |
e7fd4179 | 724 | { |
9ae0f367 | 725 | int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); |
4f4c337f FF |
726 | |
727 | if (rc) | |
728 | return rc; | |
e7fd4179 DT |
729 | return len; |
730 | } | |
731 | ||
9ae0f367 CH |
732 | CONFIGFS_ATTR(node_, nodeid); |
733 | CONFIGFS_ATTR(node_, weight); | |
734 | ||
735 | static struct configfs_attribute *node_attrs[] = { | |
736 | [NODE_ATTR_NODEID] = &node_attr_nodeid, | |
737 | [NODE_ATTR_WEIGHT] = &node_attr_weight, | |
738 | NULL, | |
739 | }; | |
740 | ||
e7fd4179 DT |
741 | /* |
742 | * Functions for the dlm to get the info that's been configured | |
743 | */ | |
744 | ||
51409340 | 745 | static struct dlm_space *get_space(char *name) |
e7fd4179 | 746 | { |
3168b078 SS |
747 | struct config_item *i; |
748 | ||
e7fd4179 DT |
749 | if (!space_list) |
750 | return NULL; | |
3168b078 | 751 | |
e6bd07ae | 752 | mutex_lock(&space_list->cg_subsys->su_mutex); |
3fe6c5ce | 753 | i = config_group_find_item(space_list, name); |
e6bd07ae | 754 | mutex_unlock(&space_list->cg_subsys->su_mutex); |
3168b078 | 755 | |
27eccf46 | 756 | return config_item_to_space(i); |
e7fd4179 DT |
757 | } |
758 | ||
51409340 | 759 | static void put_space(struct dlm_space *sp) |
e7fd4179 DT |
760 | { |
761 | config_item_put(&sp->group.cg_item); | |
762 | } | |
763 | ||
36b71a8b | 764 | static struct dlm_comm *get_comm(int nodeid) |
e7fd4179 DT |
765 | { |
766 | struct config_item *i; | |
51409340 | 767 | struct dlm_comm *cm = NULL; |
e7fd4179 DT |
768 | int found = 0; |
769 | ||
770 | if (!comm_list) | |
771 | return NULL; | |
772 | ||
e6bd07ae | 773 | mutex_lock(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
774 | |
775 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { | |
27eccf46 | 776 | cm = config_item_to_comm(i); |
e7fd4179 | 777 | |
36b71a8b DT |
778 | if (cm->nodeid != nodeid) |
779 | continue; | |
780 | found = 1; | |
781 | config_item_get(i); | |
782 | break; | |
e7fd4179 | 783 | } |
e6bd07ae | 784 | mutex_unlock(&clusters_root.subsys.su_mutex); |
e7fd4179 | 785 | |
3168b078 | 786 | if (!found) |
e7fd4179 DT |
787 | cm = NULL; |
788 | return cm; | |
789 | } | |
790 | ||
51409340 | 791 | static void put_comm(struct dlm_comm *cm) |
e7fd4179 DT |
792 | { |
793 | config_item_put(&cm->item); | |
794 | } | |
795 | ||
796 | /* caller must free mem */ | |
60f98d18 DT |
797 | int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, |
798 | int *count_out) | |
e7fd4179 | 799 | { |
51409340 DT |
800 | struct dlm_space *sp; |
801 | struct dlm_node *nd; | |
60f98d18 DT |
802 | struct dlm_config_node *nodes, *node; |
803 | int rv, count; | |
e7fd4179 DT |
804 | |
805 | sp = get_space(lsname); | |
806 | if (!sp) | |
807 | return -EEXIST; | |
808 | ||
90135925 | 809 | mutex_lock(&sp->members_lock); |
e7fd4179 | 810 | if (!sp->members_count) { |
d44e0fc7 DT |
811 | rv = -EINVAL; |
812 | printk(KERN_ERR "dlm: zero members_count\n"); | |
e7fd4179 DT |
813 | goto out; |
814 | } | |
815 | ||
60f98d18 | 816 | count = sp->members_count; |
d44e0fc7 | 817 | |
60f98d18 DT |
818 | nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); |
819 | if (!nodes) { | |
e7fd4179 DT |
820 | rv = -ENOMEM; |
821 | goto out; | |
822 | } | |
823 | ||
60f98d18 | 824 | node = nodes; |
d44e0fc7 | 825 | list_for_each_entry(nd, &sp->members, list) { |
60f98d18 DT |
826 | node->nodeid = nd->nodeid; |
827 | node->weight = nd->weight; | |
828 | node->new = nd->new; | |
829 | node->comm_seq = nd->comm_seq; | |
830 | node++; | |
d44e0fc7 | 831 | |
60f98d18 | 832 | nd->new = 0; |
d44e0fc7 | 833 | } |
e7fd4179 | 834 | |
60f98d18 DT |
835 | *count_out = count; |
836 | *nodes_out = nodes; | |
837 | rv = 0; | |
e7fd4179 | 838 | out: |
90135925 | 839 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
840 | put_space(sp); |
841 | return rv; | |
842 | } | |
843 | ||
60f98d18 | 844 | int dlm_comm_seq(int nodeid, uint32_t *seq) |
e7fd4179 | 845 | { |
36b71a8b | 846 | struct dlm_comm *cm = get_comm(nodeid); |
60f98d18 DT |
847 | if (!cm) |
848 | return -EEXIST; | |
849 | *seq = cm->seq; | |
850 | put_comm(cm); | |
851 | return 0; | |
e7fd4179 DT |
852 | } |
853 | ||
e7fd4179 DT |
854 | int dlm_our_nodeid(void) |
855 | { | |
856 | return local_comm ? local_comm->nodeid : 0; | |
857 | } | |
858 | ||
859 | /* num 0 is first addr, num 1 is second addr */ | |
860 | int dlm_our_addr(struct sockaddr_storage *addr, int num) | |
861 | { | |
862 | if (!local_comm) | |
863 | return -1; | |
864 | if (num + 1 > local_comm->addr_count) | |
865 | return -1; | |
866 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); | |
867 | return 0; | |
868 | } | |
869 | ||
870 | /* Config file defaults */ | |
871 | #define DEFAULT_TCP_PORT 21064 | |
872 | #define DEFAULT_BUFFER_SIZE 4096 | |
e3853a90 | 873 | #define DEFAULT_RSBTBL_SIZE 1024 |
e7fd4179 DT |
874 | #define DEFAULT_RECOVER_TIMER 5 |
875 | #define DEFAULT_TOSS_SECS 10 | |
876 | #define DEFAULT_SCAN_SECS 5 | |
99fc6487 | 877 | #define DEFAULT_LOG_DEBUG 0 |
6ed7257b | 878 | #define DEFAULT_PROTOCOL 0 |
3ae1acf9 | 879 | #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */ |
c6ff669b | 880 | #define DEFAULT_WAITWARN_US 0 |
3881ac04 | 881 | #define DEFAULT_NEW_RSB_COUNT 128 |
60f98d18 DT |
882 | #define DEFAULT_RECOVER_CALLBACKS 0 |
883 | #define DEFAULT_CLUSTER_NAME "" | |
e7fd4179 DT |
884 | |
885 | struct dlm_config_info dlm_config = { | |
68c817a1 DT |
886 | .ci_tcp_port = DEFAULT_TCP_PORT, |
887 | .ci_buffer_size = DEFAULT_BUFFER_SIZE, | |
888 | .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, | |
68c817a1 DT |
889 | .ci_recover_timer = DEFAULT_RECOVER_TIMER, |
890 | .ci_toss_secs = DEFAULT_TOSS_SECS, | |
99fc6487 | 891 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
6ed7257b | 892 | .ci_log_debug = DEFAULT_LOG_DEBUG, |
3ae1acf9 | 893 | .ci_protocol = DEFAULT_PROTOCOL, |
c6ff669b | 894 | .ci_timewarn_cs = DEFAULT_TIMEWARN_CS, |
3881ac04 | 895 | .ci_waitwarn_us = DEFAULT_WAITWARN_US, |
60f98d18 DT |
896 | .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, |
897 | .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, | |
898 | .ci_cluster_name = DEFAULT_CLUSTER_NAME | |
e7fd4179 DT |
899 | }; |
900 |