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2522fe45 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e7fd4179 DT |
2 | /****************************************************************************** |
3 | ******************************************************************************* | |
4 | ** | |
5 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
60f98d18 | 6 | ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
e7fd4179 | 7 | ** |
e7fd4179 DT |
8 | ** |
9 | ******************************************************************************* | |
10 | ******************************************************************************/ | |
11 | ||
12 | #include <linux/kernel.h> | |
7963b8a5 | 13 | #include <linux/init.h> |
e7fd4179 | 14 | #include <linux/configfs.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
44be6fdf DT |
16 | #include <linux/in.h> |
17 | #include <linux/in6.h> | |
60f98d18 | 18 | #include <linux/dlmconstants.h> |
44be6fdf | 19 | #include <net/ipv6.h> |
e7fd4179 DT |
20 | #include <net/sock.h> |
21 | ||
22 | #include "config.h" | |
1c032c03 | 23 | #include "lowcomms.h" |
e7fd4179 DT |
24 | |
25 | /* | |
26 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid | |
27 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight | |
28 | * /config/dlm/<cluster>/comms/<comm>/nodeid | |
29 | * /config/dlm/<cluster>/comms/<comm>/local | |
55b3286d MY |
30 | * /config/dlm/<cluster>/comms/<comm>/addr (write only) |
31 | * /config/dlm/<cluster>/comms/<comm>/addr_list (read only) | |
e7fd4179 DT |
32 | * The <cluster> level is useless, but I haven't figured out how to avoid it. |
33 | */ | |
34 | ||
35 | static struct config_group *space_list; | |
36 | static struct config_group *comm_list; | |
51409340 | 37 | static struct dlm_comm *local_comm; |
60f98d18 | 38 | static uint32_t dlm_comm_count; |
e7fd4179 | 39 | |
51409340 DT |
40 | struct dlm_clusters; |
41 | struct dlm_cluster; | |
42 | struct dlm_spaces; | |
43 | struct dlm_space; | |
44 | struct dlm_comms; | |
45 | struct dlm_comm; | |
46 | struct dlm_nodes; | |
47 | struct dlm_node; | |
e7fd4179 | 48 | |
f89ab861 | 49 | static struct config_group *make_cluster(struct config_group *, const char *); |
e7fd4179 DT |
50 | static void drop_cluster(struct config_group *, struct config_item *); |
51 | static void release_cluster(struct config_item *); | |
f89ab861 | 52 | static struct config_group *make_space(struct config_group *, const char *); |
e7fd4179 DT |
53 | static void drop_space(struct config_group *, struct config_item *); |
54 | static void release_space(struct config_item *); | |
f89ab861 | 55 | static struct config_item *make_comm(struct config_group *, const char *); |
e7fd4179 DT |
56 | static void drop_comm(struct config_group *, struct config_item *); |
57 | static void release_comm(struct config_item *); | |
f89ab861 | 58 | static struct config_item *make_node(struct config_group *, const char *); |
e7fd4179 DT |
59 | static void drop_node(struct config_group *, struct config_item *); |
60 | static void release_node(struct config_item *); | |
61 | ||
9ae0f367 CH |
62 | static struct configfs_attribute *comm_attrs[]; |
63 | static struct configfs_attribute *node_attrs[]; | |
51409340 DT |
64 | |
65 | struct dlm_cluster { | |
d200778e DT |
66 | struct config_group group; |
67 | unsigned int cl_tcp_port; | |
68 | unsigned int cl_buffer_size; | |
69 | unsigned int cl_rsbtbl_size; | |
d200778e DT |
70 | unsigned int cl_recover_timer; |
71 | unsigned int cl_toss_secs; | |
72 | unsigned int cl_scan_secs; | |
73 | unsigned int cl_log_debug; | |
505ee528 | 74 | unsigned int cl_log_info; |
6ed7257b | 75 | unsigned int cl_protocol; |
3ae1acf9 | 76 | unsigned int cl_timewarn_cs; |
c6ff669b | 77 | unsigned int cl_waitwarn_us; |
3881ac04 | 78 | unsigned int cl_new_rsb_count; |
60f98d18 DT |
79 | unsigned int cl_recover_callbacks; |
80 | char cl_cluster_name[DLM_LOCKSPACE_LEN]; | |
d200778e DT |
81 | }; |
82 | ||
9ae0f367 CH |
83 | static struct dlm_cluster *config_item_to_cluster(struct config_item *i) |
84 | { | |
85 | return i ? container_of(to_config_group(i), struct dlm_cluster, group) : | |
86 | NULL; | |
87 | } | |
88 | ||
d200778e DT |
89 | enum { |
90 | CLUSTER_ATTR_TCP_PORT = 0, | |
91 | CLUSTER_ATTR_BUFFER_SIZE, | |
92 | CLUSTER_ATTR_RSBTBL_SIZE, | |
d200778e DT |
93 | CLUSTER_ATTR_RECOVER_TIMER, |
94 | CLUSTER_ATTR_TOSS_SECS, | |
95 | CLUSTER_ATTR_SCAN_SECS, | |
96 | CLUSTER_ATTR_LOG_DEBUG, | |
505ee528 | 97 | CLUSTER_ATTR_LOG_INFO, |
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); | |
505ee528 | 169 | CLUSTER_ATTR(log_info, 0); |
6ed7257b | 170 | CLUSTER_ATTR(protocol, 0); |
3ae1acf9 | 171 | CLUSTER_ATTR(timewarn_cs, 1); |
c6ff669b | 172 | CLUSTER_ATTR(waitwarn_us, 0); |
3881ac04 | 173 | CLUSTER_ATTR(new_rsb_count, 0); |
60f98d18 | 174 | CLUSTER_ATTR(recover_callbacks, 0); |
d200778e DT |
175 | |
176 | static struct configfs_attribute *cluster_attrs[] = { | |
9ae0f367 CH |
177 | [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, |
178 | [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, | |
179 | [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, | |
180 | [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, | |
181 | [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, | |
182 | [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, | |
183 | [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, | |
505ee528 | 184 | [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info, |
9ae0f367 CH |
185 | [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, |
186 | [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs, | |
187 | [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us, | |
188 | [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, | |
189 | [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, | |
190 | [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, | |
d200778e DT |
191 | NULL, |
192 | }; | |
193 | ||
e7fd4179 DT |
194 | enum { |
195 | COMM_ATTR_NODEID = 0, | |
196 | COMM_ATTR_LOCAL, | |
197 | COMM_ATTR_ADDR, | |
55b3286d | 198 | COMM_ATTR_ADDR_LIST, |
e7fd4179 DT |
199 | }; |
200 | ||
e7fd4179 DT |
201 | enum { |
202 | NODE_ATTR_NODEID = 0, | |
203 | NODE_ATTR_WEIGHT, | |
204 | }; | |
205 | ||
51409340 | 206 | struct dlm_clusters { |
e7fd4179 DT |
207 | struct configfs_subsystem subsys; |
208 | }; | |
209 | ||
51409340 | 210 | struct dlm_spaces { |
e7fd4179 DT |
211 | struct config_group ss_group; |
212 | }; | |
213 | ||
51409340 | 214 | struct dlm_space { |
e7fd4179 DT |
215 | struct config_group group; |
216 | struct list_head members; | |
90135925 | 217 | struct mutex members_lock; |
e7fd4179 DT |
218 | int members_count; |
219 | }; | |
220 | ||
51409340 | 221 | struct dlm_comms { |
e7fd4179 DT |
222 | struct config_group cs_group; |
223 | }; | |
224 | ||
51409340 | 225 | struct dlm_comm { |
e7fd4179 | 226 | struct config_item item; |
60f98d18 | 227 | int seq; |
e7fd4179 DT |
228 | int nodeid; |
229 | int local; | |
230 | int addr_count; | |
231 | struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; | |
232 | }; | |
233 | ||
51409340 | 234 | struct dlm_nodes { |
e7fd4179 DT |
235 | struct config_group ns_group; |
236 | }; | |
237 | ||
51409340 | 238 | struct dlm_node { |
e7fd4179 DT |
239 | struct config_item item; |
240 | struct list_head list; /* space->members */ | |
241 | int nodeid; | |
242 | int weight; | |
d44e0fc7 | 243 | int new; |
60f98d18 | 244 | int comm_seq; /* copy of cm->seq when nd->nodeid is set */ |
e7fd4179 DT |
245 | }; |
246 | ||
247 | static struct configfs_group_operations clusters_ops = { | |
248 | .make_group = make_cluster, | |
249 | .drop_item = drop_cluster, | |
250 | }; | |
251 | ||
252 | static struct configfs_item_operations cluster_ops = { | |
253 | .release = release_cluster, | |
254 | }; | |
255 | ||
256 | static struct configfs_group_operations spaces_ops = { | |
257 | .make_group = make_space, | |
258 | .drop_item = drop_space, | |
259 | }; | |
260 | ||
261 | static struct configfs_item_operations space_ops = { | |
262 | .release = release_space, | |
263 | }; | |
264 | ||
265 | static struct configfs_group_operations comms_ops = { | |
266 | .make_item = make_comm, | |
267 | .drop_item = drop_comm, | |
268 | }; | |
269 | ||
270 | static struct configfs_item_operations comm_ops = { | |
271 | .release = release_comm, | |
e7fd4179 DT |
272 | }; |
273 | ||
274 | static struct configfs_group_operations nodes_ops = { | |
275 | .make_item = make_node, | |
276 | .drop_item = drop_node, | |
277 | }; | |
278 | ||
279 | static struct configfs_item_operations node_ops = { | |
280 | .release = release_node, | |
e7fd4179 DT |
281 | }; |
282 | ||
761594b7 | 283 | static const struct config_item_type clusters_type = { |
e7fd4179 DT |
284 | .ct_group_ops = &clusters_ops, |
285 | .ct_owner = THIS_MODULE, | |
286 | }; | |
287 | ||
761594b7 | 288 | static const struct config_item_type cluster_type = { |
e7fd4179 | 289 | .ct_item_ops = &cluster_ops, |
d200778e | 290 | .ct_attrs = cluster_attrs, |
e7fd4179 DT |
291 | .ct_owner = THIS_MODULE, |
292 | }; | |
293 | ||
761594b7 | 294 | static const struct config_item_type spaces_type = { |
e7fd4179 DT |
295 | .ct_group_ops = &spaces_ops, |
296 | .ct_owner = THIS_MODULE, | |
297 | }; | |
298 | ||
761594b7 | 299 | static const struct config_item_type space_type = { |
e7fd4179 DT |
300 | .ct_item_ops = &space_ops, |
301 | .ct_owner = THIS_MODULE, | |
302 | }; | |
303 | ||
761594b7 | 304 | static const struct config_item_type comms_type = { |
e7fd4179 DT |
305 | .ct_group_ops = &comms_ops, |
306 | .ct_owner = THIS_MODULE, | |
307 | }; | |
308 | ||
761594b7 | 309 | static const struct config_item_type comm_type = { |
e7fd4179 DT |
310 | .ct_item_ops = &comm_ops, |
311 | .ct_attrs = comm_attrs, | |
312 | .ct_owner = THIS_MODULE, | |
313 | }; | |
314 | ||
761594b7 | 315 | static const struct config_item_type nodes_type = { |
e7fd4179 DT |
316 | .ct_group_ops = &nodes_ops, |
317 | .ct_owner = THIS_MODULE, | |
318 | }; | |
319 | ||
761594b7 | 320 | static const struct config_item_type node_type = { |
e7fd4179 DT |
321 | .ct_item_ops = &node_ops, |
322 | .ct_attrs = node_attrs, | |
323 | .ct_owner = THIS_MODULE, | |
324 | }; | |
325 | ||
27eccf46 | 326 | static struct dlm_space *config_item_to_space(struct config_item *i) |
e7fd4179 | 327 | { |
51409340 DT |
328 | return i ? container_of(to_config_group(i), struct dlm_space, group) : |
329 | NULL; | |
e7fd4179 DT |
330 | } |
331 | ||
27eccf46 | 332 | static struct dlm_comm *config_item_to_comm(struct config_item *i) |
e7fd4179 | 333 | { |
51409340 | 334 | return i ? container_of(i, struct dlm_comm, item) : NULL; |
e7fd4179 DT |
335 | } |
336 | ||
27eccf46 | 337 | static struct dlm_node *config_item_to_node(struct config_item *i) |
e7fd4179 | 338 | { |
51409340 | 339 | return i ? container_of(i, struct dlm_node, item) : NULL; |
e7fd4179 DT |
340 | } |
341 | ||
f89ab861 JB |
342 | static struct config_group *make_cluster(struct config_group *g, |
343 | const char *name) | |
e7fd4179 | 344 | { |
51409340 DT |
345 | struct dlm_cluster *cl = NULL; |
346 | struct dlm_spaces *sps = NULL; | |
347 | struct dlm_comms *cms = NULL; | |
e7fd4179 | 348 | |
573c24c4 | 349 | cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); |
573c24c4 DT |
350 | sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); |
351 | cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); | |
e7fd4179 | 352 | |
82c7d823 | 353 | if (!cl || !sps || !cms) |
e7fd4179 DT |
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 | ||
1ae1602d CH |
360 | configfs_add_default_group(&sps->ss_group, &cl->group); |
361 | configfs_add_default_group(&cms->cs_group, &cl->group); | |
e7fd4179 | 362 | |
d200778e DT |
363 | cl->cl_tcp_port = dlm_config.ci_tcp_port; |
364 | cl->cl_buffer_size = dlm_config.ci_buffer_size; | |
365 | cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; | |
d200778e DT |
366 | cl->cl_recover_timer = dlm_config.ci_recover_timer; |
367 | cl->cl_toss_secs = dlm_config.ci_toss_secs; | |
368 | cl->cl_scan_secs = dlm_config.ci_scan_secs; | |
369 | cl->cl_log_debug = dlm_config.ci_log_debug; | |
505ee528 | 370 | cl->cl_log_info = dlm_config.ci_log_info; |
0b7cac0f | 371 | cl->cl_protocol = dlm_config.ci_protocol; |
84d8cd69 | 372 | cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs; |
c6ff669b | 373 | cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us; |
3881ac04 | 374 | cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; |
60f98d18 DT |
375 | cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; |
376 | memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, | |
377 | DLM_LOCKSPACE_LEN); | |
d200778e | 378 | |
e7fd4179 DT |
379 | space_list = &sps->ss_group; |
380 | comm_list = &cms->cs_group; | |
f89ab861 | 381 | return &cl->group; |
e7fd4179 DT |
382 | |
383 | fail: | |
384 | kfree(cl); | |
e7fd4179 DT |
385 | kfree(sps); |
386 | kfree(cms); | |
a6795e9e | 387 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
388 | } |
389 | ||
390 | static void drop_cluster(struct config_group *g, struct config_item *i) | |
391 | { | |
27eccf46 | 392 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 | 393 | |
1ae1602d | 394 | configfs_remove_default_groups(&cl->group); |
e7fd4179 DT |
395 | |
396 | space_list = NULL; | |
397 | comm_list = NULL; | |
398 | ||
399 | config_item_put(i); | |
400 | } | |
401 | ||
402 | static void release_cluster(struct config_item *i) | |
403 | { | |
27eccf46 | 404 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 DT |
405 | kfree(cl); |
406 | } | |
407 | ||
f89ab861 | 408 | static struct config_group *make_space(struct config_group *g, const char *name) |
e7fd4179 | 409 | { |
51409340 DT |
410 | struct dlm_space *sp = NULL; |
411 | struct dlm_nodes *nds = NULL; | |
e7fd4179 | 412 | |
573c24c4 | 413 | sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); |
573c24c4 | 414 | nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); |
e7fd4179 | 415 | |
1ae1602d | 416 | if (!sp || !nds) |
e7fd4179 DT |
417 | goto fail; |
418 | ||
419 | config_group_init_type_name(&sp->group, name, &space_type); | |
e7fd4179 | 420 | |
1ae1602d CH |
421 | config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); |
422 | configfs_add_default_group(&nds->ns_group, &sp->group); | |
e7fd4179 DT |
423 | |
424 | INIT_LIST_HEAD(&sp->members); | |
90135925 | 425 | mutex_init(&sp->members_lock); |
e7fd4179 | 426 | sp->members_count = 0; |
f89ab861 | 427 | return &sp->group; |
e7fd4179 DT |
428 | |
429 | fail: | |
430 | kfree(sp); | |
e7fd4179 | 431 | kfree(nds); |
a6795e9e | 432 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
433 | } |
434 | ||
435 | static void drop_space(struct config_group *g, struct config_item *i) | |
436 | { | |
27eccf46 | 437 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
438 | |
439 | /* assert list_empty(&sp->members) */ | |
440 | ||
1ae1602d | 441 | configfs_remove_default_groups(&sp->group); |
e7fd4179 DT |
442 | config_item_put(i); |
443 | } | |
444 | ||
445 | static void release_space(struct config_item *i) | |
446 | { | |
27eccf46 | 447 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
448 | kfree(sp); |
449 | } | |
450 | ||
f89ab861 | 451 | static struct config_item *make_comm(struct config_group *g, const char *name) |
e7fd4179 | 452 | { |
51409340 | 453 | struct dlm_comm *cm; |
e7fd4179 | 454 | |
573c24c4 | 455 | cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); |
e7fd4179 | 456 | if (!cm) |
a6795e9e | 457 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
458 | |
459 | config_item_init_type_name(&cm->item, name, &comm_type); | |
60f98d18 DT |
460 | |
461 | cm->seq = dlm_comm_count++; | |
462 | if (!cm->seq) | |
463 | cm->seq = dlm_comm_count++; | |
464 | ||
e7fd4179 DT |
465 | cm->nodeid = -1; |
466 | cm->local = 0; | |
467 | cm->addr_count = 0; | |
f89ab861 | 468 | return &cm->item; |
e7fd4179 DT |
469 | } |
470 | ||
471 | static void drop_comm(struct config_group *g, struct config_item *i) | |
472 | { | |
27eccf46 | 473 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
474 | if (local_comm == cm) |
475 | local_comm = NULL; | |
1c032c03 | 476 | dlm_lowcomms_close(cm->nodeid); |
e7fd4179 DT |
477 | while (cm->addr_count--) |
478 | kfree(cm->addr[cm->addr_count]); | |
479 | config_item_put(i); | |
480 | } | |
481 | ||
482 | static void release_comm(struct config_item *i) | |
483 | { | |
27eccf46 | 484 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
485 | kfree(cm); |
486 | } | |
487 | ||
f89ab861 | 488 | static struct config_item *make_node(struct config_group *g, const char *name) |
e7fd4179 | 489 | { |
27eccf46 | 490 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
51409340 | 491 | struct dlm_node *nd; |
e7fd4179 | 492 | |
573c24c4 | 493 | nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); |
e7fd4179 | 494 | if (!nd) |
a6795e9e | 495 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
496 | |
497 | config_item_init_type_name(&nd->item, name, &node_type); | |
498 | nd->nodeid = -1; | |
499 | nd->weight = 1; /* default weight of 1 if none is set */ | |
d44e0fc7 | 500 | nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ |
e7fd4179 | 501 | |
90135925 | 502 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
503 | list_add(&nd->list, &sp->members); |
504 | sp->members_count++; | |
90135925 | 505 | mutex_unlock(&sp->members_lock); |
e7fd4179 | 506 | |
f89ab861 | 507 | return &nd->item; |
e7fd4179 DT |
508 | } |
509 | ||
510 | static void drop_node(struct config_group *g, struct config_item *i) | |
511 | { | |
27eccf46 AM |
512 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
513 | struct dlm_node *nd = config_item_to_node(i); | |
e7fd4179 | 514 | |
90135925 | 515 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
516 | list_del(&nd->list); |
517 | sp->members_count--; | |
90135925 | 518 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
519 | |
520 | config_item_put(i); | |
521 | } | |
522 | ||
523 | static void release_node(struct config_item *i) | |
524 | { | |
27eccf46 | 525 | struct dlm_node *nd = config_item_to_node(i); |
e7fd4179 DT |
526 | kfree(nd); |
527 | } | |
528 | ||
51409340 | 529 | static struct dlm_clusters clusters_root = { |
e7fd4179 DT |
530 | .subsys = { |
531 | .su_group = { | |
532 | .cg_item = { | |
533 | .ci_namebuf = "dlm", | |
534 | .ci_type = &clusters_type, | |
535 | }, | |
536 | }, | |
537 | }, | |
538 | }; | |
539 | ||
30727174 | 540 | int __init dlm_config_init(void) |
e7fd4179 DT |
541 | { |
542 | config_group_init(&clusters_root.subsys.su_group); | |
e6bd07ae | 543 | mutex_init(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
544 | return configfs_register_subsystem(&clusters_root.subsys); |
545 | } | |
546 | ||
547 | void dlm_config_exit(void) | |
548 | { | |
549 | configfs_unregister_subsystem(&clusters_root.subsys); | |
550 | } | |
551 | ||
552 | /* | |
553 | * Functions for user space to read/write attributes | |
554 | */ | |
555 | ||
9ae0f367 | 556 | static ssize_t comm_nodeid_show(struct config_item *item, char *buf) |
d200778e | 557 | { |
9ae0f367 | 558 | return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); |
e7fd4179 DT |
559 | } |
560 | ||
9ae0f367 | 561 | static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 562 | size_t len) |
e7fd4179 | 563 | { |
9ae0f367 | 564 | int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); |
4f4c337f FF |
565 | |
566 | if (rc) | |
567 | return rc; | |
e7fd4179 DT |
568 | return len; |
569 | } | |
570 | ||
9ae0f367 | 571 | static ssize_t comm_local_show(struct config_item *item, char *buf) |
e7fd4179 | 572 | { |
9ae0f367 | 573 | return sprintf(buf, "%d\n", config_item_to_comm(item)->local); |
e7fd4179 DT |
574 | } |
575 | ||
9ae0f367 | 576 | static ssize_t comm_local_store(struct config_item *item, const char *buf, |
51409340 | 577 | size_t len) |
e7fd4179 | 578 | { |
9ae0f367 | 579 | struct dlm_comm *cm = config_item_to_comm(item); |
4f4c337f FF |
580 | int rc = kstrtoint(buf, 0, &cm->local); |
581 | ||
582 | if (rc) | |
583 | return rc; | |
e7fd4179 DT |
584 | if (cm->local && !local_comm) |
585 | local_comm = cm; | |
586 | return len; | |
587 | } | |
588 | ||
9ae0f367 CH |
589 | static ssize_t comm_addr_store(struct config_item *item, const char *buf, |
590 | size_t len) | |
e7fd4179 | 591 | { |
9ae0f367 | 592 | struct dlm_comm *cm = config_item_to_comm(item); |
e7fd4179 | 593 | struct sockaddr_storage *addr; |
36b71a8b | 594 | int rv; |
e7fd4179 DT |
595 | |
596 | if (len != sizeof(struct sockaddr_storage)) | |
597 | return -EINVAL; | |
598 | ||
599 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) | |
600 | return -ENOSPC; | |
601 | ||
573c24c4 | 602 | addr = kzalloc(sizeof(*addr), GFP_NOFS); |
e7fd4179 DT |
603 | if (!addr) |
604 | return -ENOMEM; | |
605 | ||
606 | memcpy(addr, buf, len); | |
36b71a8b DT |
607 | |
608 | rv = dlm_lowcomms_addr(cm->nodeid, addr, len); | |
609 | if (rv) { | |
610 | kfree(addr); | |
611 | return rv; | |
612 | } | |
613 | ||
e7fd4179 DT |
614 | cm->addr[cm->addr_count++] = addr; |
615 | return len; | |
616 | } | |
617 | ||
9ae0f367 | 618 | static ssize_t comm_addr_list_show(struct config_item *item, char *buf) |
55b3286d | 619 | { |
9ae0f367 | 620 | struct dlm_comm *cm = config_item_to_comm(item); |
55b3286d MY |
621 | ssize_t s; |
622 | ssize_t allowance; | |
623 | int i; | |
624 | struct sockaddr_storage *addr; | |
625 | struct sockaddr_in *addr_in; | |
626 | struct sockaddr_in6 *addr_in6; | |
627 | ||
628 | /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ | |
629 | char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; | |
630 | ||
631 | ||
632 | /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ | |
633 | allowance = 4096; | |
634 | buf[0] = '\0'; | |
635 | ||
636 | for (i = 0; i < cm->addr_count; i++) { | |
637 | addr = cm->addr[i]; | |
638 | ||
639 | switch(addr->ss_family) { | |
640 | case AF_INET: | |
641 | addr_in = (struct sockaddr_in *)addr; | |
642 | s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); | |
643 | break; | |
644 | case AF_INET6: | |
645 | addr_in6 = (struct sockaddr_in6 *)addr; | |
646 | s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); | |
647 | break; | |
648 | default: | |
649 | s = sprintf(buf0, "%s\n", "<UNKNOWN>"); | |
650 | break; | |
651 | } | |
652 | allowance -= s; | |
653 | if (allowance >= 0) | |
654 | strcat(buf, buf0); | |
655 | else { | |
656 | allowance += s; | |
657 | break; | |
658 | } | |
659 | } | |
660 | return 4096 - allowance; | |
661 | } | |
662 | ||
9ae0f367 CH |
663 | CONFIGFS_ATTR(comm_, nodeid); |
664 | CONFIGFS_ATTR(comm_, local); | |
665 | CONFIGFS_ATTR_WO(comm_, addr); | |
666 | CONFIGFS_ATTR_RO(comm_, addr_list); | |
e7fd4179 | 667 | |
9ae0f367 CH |
668 | static struct configfs_attribute *comm_attrs[] = { |
669 | [COMM_ATTR_NODEID] = &comm_attr_nodeid, | |
670 | [COMM_ATTR_LOCAL] = &comm_attr_local, | |
671 | [COMM_ATTR_ADDR] = &comm_attr_addr, | |
672 | [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, | |
673 | NULL, | |
674 | }; | |
e7fd4179 | 675 | |
9ae0f367 | 676 | static ssize_t node_nodeid_show(struct config_item *item, char *buf) |
e7fd4179 | 677 | { |
9ae0f367 | 678 | return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); |
e7fd4179 DT |
679 | } |
680 | ||
9ae0f367 | 681 | static ssize_t node_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 682 | size_t len) |
e7fd4179 | 683 | { |
9ae0f367 | 684 | struct dlm_node *nd = config_item_to_node(item); |
60f98d18 | 685 | uint32_t seq = 0; |
4f4c337f FF |
686 | int rc = kstrtoint(buf, 0, &nd->nodeid); |
687 | ||
688 | if (rc) | |
689 | return rc; | |
60f98d18 DT |
690 | dlm_comm_seq(nd->nodeid, &seq); |
691 | nd->comm_seq = seq; | |
e7fd4179 DT |
692 | return len; |
693 | } | |
694 | ||
9ae0f367 | 695 | static ssize_t node_weight_show(struct config_item *item, char *buf) |
e7fd4179 | 696 | { |
9ae0f367 | 697 | return sprintf(buf, "%d\n", config_item_to_node(item)->weight); |
e7fd4179 DT |
698 | } |
699 | ||
9ae0f367 | 700 | static ssize_t node_weight_store(struct config_item *item, const char *buf, |
51409340 | 701 | size_t len) |
e7fd4179 | 702 | { |
9ae0f367 | 703 | int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); |
4f4c337f FF |
704 | |
705 | if (rc) | |
706 | return rc; | |
e7fd4179 DT |
707 | return len; |
708 | } | |
709 | ||
9ae0f367 CH |
710 | CONFIGFS_ATTR(node_, nodeid); |
711 | CONFIGFS_ATTR(node_, weight); | |
712 | ||
713 | static struct configfs_attribute *node_attrs[] = { | |
714 | [NODE_ATTR_NODEID] = &node_attr_nodeid, | |
715 | [NODE_ATTR_WEIGHT] = &node_attr_weight, | |
716 | NULL, | |
717 | }; | |
718 | ||
e7fd4179 DT |
719 | /* |
720 | * Functions for the dlm to get the info that's been configured | |
721 | */ | |
722 | ||
51409340 | 723 | static struct dlm_space *get_space(char *name) |
e7fd4179 | 724 | { |
3168b078 SS |
725 | struct config_item *i; |
726 | ||
e7fd4179 DT |
727 | if (!space_list) |
728 | return NULL; | |
3168b078 | 729 | |
e6bd07ae | 730 | mutex_lock(&space_list->cg_subsys->su_mutex); |
3fe6c5ce | 731 | i = config_group_find_item(space_list, name); |
e6bd07ae | 732 | mutex_unlock(&space_list->cg_subsys->su_mutex); |
3168b078 | 733 | |
27eccf46 | 734 | return config_item_to_space(i); |
e7fd4179 DT |
735 | } |
736 | ||
51409340 | 737 | static void put_space(struct dlm_space *sp) |
e7fd4179 DT |
738 | { |
739 | config_item_put(&sp->group.cg_item); | |
740 | } | |
741 | ||
36b71a8b | 742 | static struct dlm_comm *get_comm(int nodeid) |
e7fd4179 DT |
743 | { |
744 | struct config_item *i; | |
51409340 | 745 | struct dlm_comm *cm = NULL; |
e7fd4179 DT |
746 | int found = 0; |
747 | ||
748 | if (!comm_list) | |
749 | return NULL; | |
750 | ||
e6bd07ae | 751 | mutex_lock(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
752 | |
753 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { | |
27eccf46 | 754 | cm = config_item_to_comm(i); |
e7fd4179 | 755 | |
36b71a8b DT |
756 | if (cm->nodeid != nodeid) |
757 | continue; | |
758 | found = 1; | |
759 | config_item_get(i); | |
760 | break; | |
e7fd4179 | 761 | } |
e6bd07ae | 762 | mutex_unlock(&clusters_root.subsys.su_mutex); |
e7fd4179 | 763 | |
3168b078 | 764 | if (!found) |
e7fd4179 DT |
765 | cm = NULL; |
766 | return cm; | |
767 | } | |
768 | ||
51409340 | 769 | static void put_comm(struct dlm_comm *cm) |
e7fd4179 DT |
770 | { |
771 | config_item_put(&cm->item); | |
772 | } | |
773 | ||
774 | /* caller must free mem */ | |
60f98d18 DT |
775 | int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, |
776 | int *count_out) | |
e7fd4179 | 777 | { |
51409340 DT |
778 | struct dlm_space *sp; |
779 | struct dlm_node *nd; | |
60f98d18 DT |
780 | struct dlm_config_node *nodes, *node; |
781 | int rv, count; | |
e7fd4179 DT |
782 | |
783 | sp = get_space(lsname); | |
784 | if (!sp) | |
785 | return -EEXIST; | |
786 | ||
90135925 | 787 | mutex_lock(&sp->members_lock); |
e7fd4179 | 788 | if (!sp->members_count) { |
d44e0fc7 DT |
789 | rv = -EINVAL; |
790 | printk(KERN_ERR "dlm: zero members_count\n"); | |
e7fd4179 DT |
791 | goto out; |
792 | } | |
793 | ||
60f98d18 | 794 | count = sp->members_count; |
d44e0fc7 | 795 | |
60f98d18 DT |
796 | nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); |
797 | if (!nodes) { | |
e7fd4179 DT |
798 | rv = -ENOMEM; |
799 | goto out; | |
800 | } | |
801 | ||
60f98d18 | 802 | node = nodes; |
d44e0fc7 | 803 | list_for_each_entry(nd, &sp->members, list) { |
60f98d18 DT |
804 | node->nodeid = nd->nodeid; |
805 | node->weight = nd->weight; | |
806 | node->new = nd->new; | |
807 | node->comm_seq = nd->comm_seq; | |
808 | node++; | |
d44e0fc7 | 809 | |
60f98d18 | 810 | nd->new = 0; |
d44e0fc7 | 811 | } |
e7fd4179 | 812 | |
60f98d18 DT |
813 | *count_out = count; |
814 | *nodes_out = nodes; | |
815 | rv = 0; | |
e7fd4179 | 816 | out: |
90135925 | 817 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
818 | put_space(sp); |
819 | return rv; | |
820 | } | |
821 | ||
60f98d18 | 822 | int dlm_comm_seq(int nodeid, uint32_t *seq) |
e7fd4179 | 823 | { |
36b71a8b | 824 | struct dlm_comm *cm = get_comm(nodeid); |
60f98d18 DT |
825 | if (!cm) |
826 | return -EEXIST; | |
827 | *seq = cm->seq; | |
828 | put_comm(cm); | |
829 | return 0; | |
e7fd4179 DT |
830 | } |
831 | ||
e7fd4179 DT |
832 | int dlm_our_nodeid(void) |
833 | { | |
834 | return local_comm ? local_comm->nodeid : 0; | |
835 | } | |
836 | ||
837 | /* num 0 is first addr, num 1 is second addr */ | |
838 | int dlm_our_addr(struct sockaddr_storage *addr, int num) | |
839 | { | |
840 | if (!local_comm) | |
841 | return -1; | |
842 | if (num + 1 > local_comm->addr_count) | |
843 | return -1; | |
844 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); | |
845 | return 0; | |
846 | } | |
847 | ||
848 | /* Config file defaults */ | |
849 | #define DEFAULT_TCP_PORT 21064 | |
850 | #define DEFAULT_BUFFER_SIZE 4096 | |
e3853a90 | 851 | #define DEFAULT_RSBTBL_SIZE 1024 |
e7fd4179 DT |
852 | #define DEFAULT_RECOVER_TIMER 5 |
853 | #define DEFAULT_TOSS_SECS 10 | |
854 | #define DEFAULT_SCAN_SECS 5 | |
99fc6487 | 855 | #define DEFAULT_LOG_DEBUG 0 |
505ee528 | 856 | #define DEFAULT_LOG_INFO 1 |
6ed7257b | 857 | #define DEFAULT_PROTOCOL 0 |
3ae1acf9 | 858 | #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */ |
c6ff669b | 859 | #define DEFAULT_WAITWARN_US 0 |
3881ac04 | 860 | #define DEFAULT_NEW_RSB_COUNT 128 |
60f98d18 DT |
861 | #define DEFAULT_RECOVER_CALLBACKS 0 |
862 | #define DEFAULT_CLUSTER_NAME "" | |
e7fd4179 DT |
863 | |
864 | struct dlm_config_info dlm_config = { | |
68c817a1 DT |
865 | .ci_tcp_port = DEFAULT_TCP_PORT, |
866 | .ci_buffer_size = DEFAULT_BUFFER_SIZE, | |
867 | .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, | |
68c817a1 DT |
868 | .ci_recover_timer = DEFAULT_RECOVER_TIMER, |
869 | .ci_toss_secs = DEFAULT_TOSS_SECS, | |
99fc6487 | 870 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
6ed7257b | 871 | .ci_log_debug = DEFAULT_LOG_DEBUG, |
505ee528 | 872 | .ci_log_info = DEFAULT_LOG_INFO, |
3ae1acf9 | 873 | .ci_protocol = DEFAULT_PROTOCOL, |
c6ff669b | 874 | .ci_timewarn_cs = DEFAULT_TIMEWARN_CS, |
3881ac04 | 875 | .ci_waitwarn_us = DEFAULT_WAITWARN_US, |
60f98d18 DT |
876 | .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, |
877 | .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, | |
878 | .ci_cluster_name = DEFAULT_CLUSTER_NAME | |
e7fd4179 DT |
879 | }; |
880 |