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 | 346 | |
573c24c4 | 347 | cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); |
573c24c4 DT |
348 | sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); |
349 | cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); | |
e7fd4179 | 350 | |
82c7d823 | 351 | if (!cl || !sps || !cms) |
e7fd4179 DT |
352 | goto fail; |
353 | ||
354 | config_group_init_type_name(&cl->group, name, &cluster_type); | |
355 | config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); | |
356 | config_group_init_type_name(&cms->cs_group, "comms", &comms_type); | |
357 | ||
1ae1602d CH |
358 | configfs_add_default_group(&sps->ss_group, &cl->group); |
359 | configfs_add_default_group(&cms->cs_group, &cl->group); | |
e7fd4179 | 360 | |
d200778e DT |
361 | cl->cl_tcp_port = dlm_config.ci_tcp_port; |
362 | cl->cl_buffer_size = dlm_config.ci_buffer_size; | |
363 | cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; | |
d200778e DT |
364 | cl->cl_recover_timer = dlm_config.ci_recover_timer; |
365 | cl->cl_toss_secs = dlm_config.ci_toss_secs; | |
366 | cl->cl_scan_secs = dlm_config.ci_scan_secs; | |
367 | cl->cl_log_debug = dlm_config.ci_log_debug; | |
0b7cac0f | 368 | cl->cl_protocol = dlm_config.ci_protocol; |
84d8cd69 | 369 | cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs; |
c6ff669b | 370 | cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us; |
3881ac04 | 371 | cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; |
60f98d18 DT |
372 | cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; |
373 | memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, | |
374 | DLM_LOCKSPACE_LEN); | |
d200778e | 375 | |
e7fd4179 DT |
376 | space_list = &sps->ss_group; |
377 | comm_list = &cms->cs_group; | |
f89ab861 | 378 | return &cl->group; |
e7fd4179 DT |
379 | |
380 | fail: | |
381 | kfree(cl); | |
e7fd4179 DT |
382 | kfree(sps); |
383 | kfree(cms); | |
a6795e9e | 384 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
385 | } |
386 | ||
387 | static void drop_cluster(struct config_group *g, struct config_item *i) | |
388 | { | |
27eccf46 | 389 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 | 390 | |
1ae1602d | 391 | configfs_remove_default_groups(&cl->group); |
e7fd4179 DT |
392 | |
393 | space_list = NULL; | |
394 | comm_list = NULL; | |
395 | ||
396 | config_item_put(i); | |
397 | } | |
398 | ||
399 | static void release_cluster(struct config_item *i) | |
400 | { | |
27eccf46 | 401 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 DT |
402 | kfree(cl); |
403 | } | |
404 | ||
f89ab861 | 405 | static struct config_group *make_space(struct config_group *g, const char *name) |
e7fd4179 | 406 | { |
51409340 DT |
407 | struct dlm_space *sp = NULL; |
408 | struct dlm_nodes *nds = NULL; | |
e7fd4179 | 409 | |
573c24c4 | 410 | sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); |
573c24c4 | 411 | nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); |
e7fd4179 | 412 | |
1ae1602d | 413 | if (!sp || !nds) |
e7fd4179 DT |
414 | goto fail; |
415 | ||
416 | config_group_init_type_name(&sp->group, name, &space_type); | |
e7fd4179 | 417 | |
1ae1602d CH |
418 | config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); |
419 | configfs_add_default_group(&nds->ns_group, &sp->group); | |
e7fd4179 DT |
420 | |
421 | INIT_LIST_HEAD(&sp->members); | |
90135925 | 422 | mutex_init(&sp->members_lock); |
e7fd4179 | 423 | sp->members_count = 0; |
f89ab861 | 424 | return &sp->group; |
e7fd4179 DT |
425 | |
426 | fail: | |
427 | kfree(sp); | |
e7fd4179 | 428 | kfree(nds); |
a6795e9e | 429 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
430 | } |
431 | ||
432 | static void drop_space(struct config_group *g, struct config_item *i) | |
433 | { | |
27eccf46 | 434 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
435 | |
436 | /* assert list_empty(&sp->members) */ | |
437 | ||
1ae1602d | 438 | configfs_remove_default_groups(&sp->group); |
e7fd4179 DT |
439 | config_item_put(i); |
440 | } | |
441 | ||
442 | static void release_space(struct config_item *i) | |
443 | { | |
27eccf46 | 444 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
445 | kfree(sp); |
446 | } | |
447 | ||
f89ab861 | 448 | static struct config_item *make_comm(struct config_group *g, const char *name) |
e7fd4179 | 449 | { |
51409340 | 450 | struct dlm_comm *cm; |
e7fd4179 | 451 | |
573c24c4 | 452 | cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); |
e7fd4179 | 453 | if (!cm) |
a6795e9e | 454 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
455 | |
456 | config_item_init_type_name(&cm->item, name, &comm_type); | |
60f98d18 DT |
457 | |
458 | cm->seq = dlm_comm_count++; | |
459 | if (!cm->seq) | |
460 | cm->seq = dlm_comm_count++; | |
461 | ||
e7fd4179 DT |
462 | cm->nodeid = -1; |
463 | cm->local = 0; | |
464 | cm->addr_count = 0; | |
f89ab861 | 465 | return &cm->item; |
e7fd4179 DT |
466 | } |
467 | ||
468 | static void drop_comm(struct config_group *g, struct config_item *i) | |
469 | { | |
27eccf46 | 470 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
471 | if (local_comm == cm) |
472 | local_comm = NULL; | |
1c032c03 | 473 | dlm_lowcomms_close(cm->nodeid); |
e7fd4179 DT |
474 | while (cm->addr_count--) |
475 | kfree(cm->addr[cm->addr_count]); | |
476 | config_item_put(i); | |
477 | } | |
478 | ||
479 | static void release_comm(struct config_item *i) | |
480 | { | |
27eccf46 | 481 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
482 | kfree(cm); |
483 | } | |
484 | ||
f89ab861 | 485 | static struct config_item *make_node(struct config_group *g, const char *name) |
e7fd4179 | 486 | { |
27eccf46 | 487 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
51409340 | 488 | struct dlm_node *nd; |
e7fd4179 | 489 | |
573c24c4 | 490 | nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); |
e7fd4179 | 491 | if (!nd) |
a6795e9e | 492 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
493 | |
494 | config_item_init_type_name(&nd->item, name, &node_type); | |
495 | nd->nodeid = -1; | |
496 | nd->weight = 1; /* default weight of 1 if none is set */ | |
d44e0fc7 | 497 | nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ |
e7fd4179 | 498 | |
90135925 | 499 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
500 | list_add(&nd->list, &sp->members); |
501 | sp->members_count++; | |
90135925 | 502 | mutex_unlock(&sp->members_lock); |
e7fd4179 | 503 | |
f89ab861 | 504 | return &nd->item; |
e7fd4179 DT |
505 | } |
506 | ||
507 | static void drop_node(struct config_group *g, struct config_item *i) | |
508 | { | |
27eccf46 AM |
509 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
510 | struct dlm_node *nd = config_item_to_node(i); | |
e7fd4179 | 511 | |
90135925 | 512 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
513 | list_del(&nd->list); |
514 | sp->members_count--; | |
90135925 | 515 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
516 | |
517 | config_item_put(i); | |
518 | } | |
519 | ||
520 | static void release_node(struct config_item *i) | |
521 | { | |
27eccf46 | 522 | struct dlm_node *nd = config_item_to_node(i); |
e7fd4179 DT |
523 | kfree(nd); |
524 | } | |
525 | ||
51409340 | 526 | static struct dlm_clusters clusters_root = { |
e7fd4179 DT |
527 | .subsys = { |
528 | .su_group = { | |
529 | .cg_item = { | |
530 | .ci_namebuf = "dlm", | |
531 | .ci_type = &clusters_type, | |
532 | }, | |
533 | }, | |
534 | }, | |
535 | }; | |
536 | ||
30727174 | 537 | int __init dlm_config_init(void) |
e7fd4179 DT |
538 | { |
539 | config_group_init(&clusters_root.subsys.su_group); | |
e6bd07ae | 540 | mutex_init(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
541 | return configfs_register_subsystem(&clusters_root.subsys); |
542 | } | |
543 | ||
544 | void dlm_config_exit(void) | |
545 | { | |
546 | configfs_unregister_subsystem(&clusters_root.subsys); | |
547 | } | |
548 | ||
549 | /* | |
550 | * Functions for user space to read/write attributes | |
551 | */ | |
552 | ||
9ae0f367 | 553 | static ssize_t comm_nodeid_show(struct config_item *item, char *buf) |
d200778e | 554 | { |
9ae0f367 | 555 | return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); |
e7fd4179 DT |
556 | } |
557 | ||
9ae0f367 | 558 | static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 559 | size_t len) |
e7fd4179 | 560 | { |
9ae0f367 | 561 | int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); |
4f4c337f FF |
562 | |
563 | if (rc) | |
564 | return rc; | |
e7fd4179 DT |
565 | return len; |
566 | } | |
567 | ||
9ae0f367 | 568 | static ssize_t comm_local_show(struct config_item *item, char *buf) |
e7fd4179 | 569 | { |
9ae0f367 | 570 | return sprintf(buf, "%d\n", config_item_to_comm(item)->local); |
e7fd4179 DT |
571 | } |
572 | ||
9ae0f367 | 573 | static ssize_t comm_local_store(struct config_item *item, const char *buf, |
51409340 | 574 | size_t len) |
e7fd4179 | 575 | { |
9ae0f367 | 576 | struct dlm_comm *cm = config_item_to_comm(item); |
4f4c337f FF |
577 | int rc = kstrtoint(buf, 0, &cm->local); |
578 | ||
579 | if (rc) | |
580 | return rc; | |
e7fd4179 DT |
581 | if (cm->local && !local_comm) |
582 | local_comm = cm; | |
583 | return len; | |
584 | } | |
585 | ||
9ae0f367 CH |
586 | static ssize_t comm_addr_store(struct config_item *item, const char *buf, |
587 | size_t len) | |
e7fd4179 | 588 | { |
9ae0f367 | 589 | struct dlm_comm *cm = config_item_to_comm(item); |
e7fd4179 | 590 | struct sockaddr_storage *addr; |
36b71a8b | 591 | int rv; |
e7fd4179 DT |
592 | |
593 | if (len != sizeof(struct sockaddr_storage)) | |
594 | return -EINVAL; | |
595 | ||
596 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) | |
597 | return -ENOSPC; | |
598 | ||
573c24c4 | 599 | addr = kzalloc(sizeof(*addr), GFP_NOFS); |
e7fd4179 DT |
600 | if (!addr) |
601 | return -ENOMEM; | |
602 | ||
603 | memcpy(addr, buf, len); | |
36b71a8b DT |
604 | |
605 | rv = dlm_lowcomms_addr(cm->nodeid, addr, len); | |
606 | if (rv) { | |
607 | kfree(addr); | |
608 | return rv; | |
609 | } | |
610 | ||
e7fd4179 DT |
611 | cm->addr[cm->addr_count++] = addr; |
612 | return len; | |
613 | } | |
614 | ||
9ae0f367 | 615 | static ssize_t comm_addr_list_show(struct config_item *item, char *buf) |
55b3286d | 616 | { |
9ae0f367 | 617 | struct dlm_comm *cm = config_item_to_comm(item); |
55b3286d MY |
618 | ssize_t s; |
619 | ssize_t allowance; | |
620 | int i; | |
621 | struct sockaddr_storage *addr; | |
622 | struct sockaddr_in *addr_in; | |
623 | struct sockaddr_in6 *addr_in6; | |
624 | ||
625 | /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ | |
626 | char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; | |
627 | ||
628 | ||
629 | /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ | |
630 | allowance = 4096; | |
631 | buf[0] = '\0'; | |
632 | ||
633 | for (i = 0; i < cm->addr_count; i++) { | |
634 | addr = cm->addr[i]; | |
635 | ||
636 | switch(addr->ss_family) { | |
637 | case AF_INET: | |
638 | addr_in = (struct sockaddr_in *)addr; | |
639 | s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); | |
640 | break; | |
641 | case AF_INET6: | |
642 | addr_in6 = (struct sockaddr_in6 *)addr; | |
643 | s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); | |
644 | break; | |
645 | default: | |
646 | s = sprintf(buf0, "%s\n", "<UNKNOWN>"); | |
647 | break; | |
648 | } | |
649 | allowance -= s; | |
650 | if (allowance >= 0) | |
651 | strcat(buf, buf0); | |
652 | else { | |
653 | allowance += s; | |
654 | break; | |
655 | } | |
656 | } | |
657 | return 4096 - allowance; | |
658 | } | |
659 | ||
9ae0f367 CH |
660 | CONFIGFS_ATTR(comm_, nodeid); |
661 | CONFIGFS_ATTR(comm_, local); | |
662 | CONFIGFS_ATTR_WO(comm_, addr); | |
663 | CONFIGFS_ATTR_RO(comm_, addr_list); | |
e7fd4179 | 664 | |
9ae0f367 CH |
665 | static struct configfs_attribute *comm_attrs[] = { |
666 | [COMM_ATTR_NODEID] = &comm_attr_nodeid, | |
667 | [COMM_ATTR_LOCAL] = &comm_attr_local, | |
668 | [COMM_ATTR_ADDR] = &comm_attr_addr, | |
669 | [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, | |
670 | NULL, | |
671 | }; | |
e7fd4179 | 672 | |
9ae0f367 | 673 | static ssize_t node_nodeid_show(struct config_item *item, char *buf) |
e7fd4179 | 674 | { |
9ae0f367 | 675 | return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); |
e7fd4179 DT |
676 | } |
677 | ||
9ae0f367 | 678 | static ssize_t node_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 679 | size_t len) |
e7fd4179 | 680 | { |
9ae0f367 | 681 | struct dlm_node *nd = config_item_to_node(item); |
60f98d18 | 682 | uint32_t seq = 0; |
4f4c337f FF |
683 | int rc = kstrtoint(buf, 0, &nd->nodeid); |
684 | ||
685 | if (rc) | |
686 | return rc; | |
60f98d18 DT |
687 | dlm_comm_seq(nd->nodeid, &seq); |
688 | nd->comm_seq = seq; | |
e7fd4179 DT |
689 | return len; |
690 | } | |
691 | ||
9ae0f367 | 692 | static ssize_t node_weight_show(struct config_item *item, char *buf) |
e7fd4179 | 693 | { |
9ae0f367 | 694 | return sprintf(buf, "%d\n", config_item_to_node(item)->weight); |
e7fd4179 DT |
695 | } |
696 | ||
9ae0f367 | 697 | static ssize_t node_weight_store(struct config_item *item, const char *buf, |
51409340 | 698 | size_t len) |
e7fd4179 | 699 | { |
9ae0f367 | 700 | int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); |
4f4c337f FF |
701 | |
702 | if (rc) | |
703 | return rc; | |
e7fd4179 DT |
704 | return len; |
705 | } | |
706 | ||
9ae0f367 CH |
707 | CONFIGFS_ATTR(node_, nodeid); |
708 | CONFIGFS_ATTR(node_, weight); | |
709 | ||
710 | static struct configfs_attribute *node_attrs[] = { | |
711 | [NODE_ATTR_NODEID] = &node_attr_nodeid, | |
712 | [NODE_ATTR_WEIGHT] = &node_attr_weight, | |
713 | NULL, | |
714 | }; | |
715 | ||
e7fd4179 DT |
716 | /* |
717 | * Functions for the dlm to get the info that's been configured | |
718 | */ | |
719 | ||
51409340 | 720 | static struct dlm_space *get_space(char *name) |
e7fd4179 | 721 | { |
3168b078 SS |
722 | struct config_item *i; |
723 | ||
e7fd4179 DT |
724 | if (!space_list) |
725 | return NULL; | |
3168b078 | 726 | |
e6bd07ae | 727 | mutex_lock(&space_list->cg_subsys->su_mutex); |
3fe6c5ce | 728 | i = config_group_find_item(space_list, name); |
e6bd07ae | 729 | mutex_unlock(&space_list->cg_subsys->su_mutex); |
3168b078 | 730 | |
27eccf46 | 731 | return config_item_to_space(i); |
e7fd4179 DT |
732 | } |
733 | ||
51409340 | 734 | static void put_space(struct dlm_space *sp) |
e7fd4179 DT |
735 | { |
736 | config_item_put(&sp->group.cg_item); | |
737 | } | |
738 | ||
36b71a8b | 739 | static struct dlm_comm *get_comm(int nodeid) |
e7fd4179 DT |
740 | { |
741 | struct config_item *i; | |
51409340 | 742 | struct dlm_comm *cm = NULL; |
e7fd4179 DT |
743 | int found = 0; |
744 | ||
745 | if (!comm_list) | |
746 | return NULL; | |
747 | ||
e6bd07ae | 748 | mutex_lock(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
749 | |
750 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { | |
27eccf46 | 751 | cm = config_item_to_comm(i); |
e7fd4179 | 752 | |
36b71a8b DT |
753 | if (cm->nodeid != nodeid) |
754 | continue; | |
755 | found = 1; | |
756 | config_item_get(i); | |
757 | break; | |
e7fd4179 | 758 | } |
e6bd07ae | 759 | mutex_unlock(&clusters_root.subsys.su_mutex); |
e7fd4179 | 760 | |
3168b078 | 761 | if (!found) |
e7fd4179 DT |
762 | cm = NULL; |
763 | return cm; | |
764 | } | |
765 | ||
51409340 | 766 | static void put_comm(struct dlm_comm *cm) |
e7fd4179 DT |
767 | { |
768 | config_item_put(&cm->item); | |
769 | } | |
770 | ||
771 | /* caller must free mem */ | |
60f98d18 DT |
772 | int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, |
773 | int *count_out) | |
e7fd4179 | 774 | { |
51409340 DT |
775 | struct dlm_space *sp; |
776 | struct dlm_node *nd; | |
60f98d18 DT |
777 | struct dlm_config_node *nodes, *node; |
778 | int rv, count; | |
e7fd4179 DT |
779 | |
780 | sp = get_space(lsname); | |
781 | if (!sp) | |
782 | return -EEXIST; | |
783 | ||
90135925 | 784 | mutex_lock(&sp->members_lock); |
e7fd4179 | 785 | if (!sp->members_count) { |
d44e0fc7 DT |
786 | rv = -EINVAL; |
787 | printk(KERN_ERR "dlm: zero members_count\n"); | |
e7fd4179 DT |
788 | goto out; |
789 | } | |
790 | ||
60f98d18 | 791 | count = sp->members_count; |
d44e0fc7 | 792 | |
60f98d18 DT |
793 | nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); |
794 | if (!nodes) { | |
e7fd4179 DT |
795 | rv = -ENOMEM; |
796 | goto out; | |
797 | } | |
798 | ||
60f98d18 | 799 | node = nodes; |
d44e0fc7 | 800 | list_for_each_entry(nd, &sp->members, list) { |
60f98d18 DT |
801 | node->nodeid = nd->nodeid; |
802 | node->weight = nd->weight; | |
803 | node->new = nd->new; | |
804 | node->comm_seq = nd->comm_seq; | |
805 | node++; | |
d44e0fc7 | 806 | |
60f98d18 | 807 | nd->new = 0; |
d44e0fc7 | 808 | } |
e7fd4179 | 809 | |
60f98d18 DT |
810 | *count_out = count; |
811 | *nodes_out = nodes; | |
812 | rv = 0; | |
e7fd4179 | 813 | out: |
90135925 | 814 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
815 | put_space(sp); |
816 | return rv; | |
817 | } | |
818 | ||
60f98d18 | 819 | int dlm_comm_seq(int nodeid, uint32_t *seq) |
e7fd4179 | 820 | { |
36b71a8b | 821 | struct dlm_comm *cm = get_comm(nodeid); |
60f98d18 DT |
822 | if (!cm) |
823 | return -EEXIST; | |
824 | *seq = cm->seq; | |
825 | put_comm(cm); | |
826 | return 0; | |
e7fd4179 DT |
827 | } |
828 | ||
e7fd4179 DT |
829 | int dlm_our_nodeid(void) |
830 | { | |
831 | return local_comm ? local_comm->nodeid : 0; | |
832 | } | |
833 | ||
834 | /* num 0 is first addr, num 1 is second addr */ | |
835 | int dlm_our_addr(struct sockaddr_storage *addr, int num) | |
836 | { | |
837 | if (!local_comm) | |
838 | return -1; | |
839 | if (num + 1 > local_comm->addr_count) | |
840 | return -1; | |
841 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); | |
842 | return 0; | |
843 | } | |
844 | ||
845 | /* Config file defaults */ | |
846 | #define DEFAULT_TCP_PORT 21064 | |
847 | #define DEFAULT_BUFFER_SIZE 4096 | |
e3853a90 | 848 | #define DEFAULT_RSBTBL_SIZE 1024 |
e7fd4179 DT |
849 | #define DEFAULT_RECOVER_TIMER 5 |
850 | #define DEFAULT_TOSS_SECS 10 | |
851 | #define DEFAULT_SCAN_SECS 5 | |
99fc6487 | 852 | #define DEFAULT_LOG_DEBUG 0 |
6ed7257b | 853 | #define DEFAULT_PROTOCOL 0 |
3ae1acf9 | 854 | #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */ |
c6ff669b | 855 | #define DEFAULT_WAITWARN_US 0 |
3881ac04 | 856 | #define DEFAULT_NEW_RSB_COUNT 128 |
60f98d18 DT |
857 | #define DEFAULT_RECOVER_CALLBACKS 0 |
858 | #define DEFAULT_CLUSTER_NAME "" | |
e7fd4179 DT |
859 | |
860 | struct dlm_config_info dlm_config = { | |
68c817a1 DT |
861 | .ci_tcp_port = DEFAULT_TCP_PORT, |
862 | .ci_buffer_size = DEFAULT_BUFFER_SIZE, | |
863 | .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, | |
68c817a1 DT |
864 | .ci_recover_timer = DEFAULT_RECOVER_TIMER, |
865 | .ci_toss_secs = DEFAULT_TOSS_SECS, | |
99fc6487 | 866 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
6ed7257b | 867 | .ci_log_debug = DEFAULT_LOG_DEBUG, |
3ae1acf9 | 868 | .ci_protocol = DEFAULT_PROTOCOL, |
c6ff669b | 869 | .ci_timewarn_cs = DEFAULT_TIMEWARN_CS, |
3881ac04 | 870 | .ci_waitwarn_us = DEFAULT_WAITWARN_US, |
60f98d18 DT |
871 | .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, |
872 | .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, | |
873 | .ci_cluster_name = DEFAULT_CLUSTER_NAME | |
e7fd4179 DT |
874 | }; |
875 |