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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; |
a5b7ab63 | 76 | unsigned int cl_mark; |
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, | |
505ee528 | 98 | CLUSTER_ATTR_LOG_INFO, |
6ed7257b | 99 | CLUSTER_ATTR_PROTOCOL, |
a5b7ab63 | 100 | CLUSTER_ATTR_MARK, |
3ae1acf9 | 101 | CLUSTER_ATTR_TIMEWARN_CS, |
c6ff669b | 102 | CLUSTER_ATTR_WAITWARN_US, |
3881ac04 | 103 | CLUSTER_ATTR_NEW_RSB_COUNT, |
60f98d18 DT |
104 | CLUSTER_ATTR_RECOVER_CALLBACKS, |
105 | CLUSTER_ATTR_CLUSTER_NAME, | |
d200778e DT |
106 | }; |
107 | ||
9ae0f367 | 108 | static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf) |
60f98d18 | 109 | { |
9ae0f367 | 110 | struct dlm_cluster *cl = config_item_to_cluster(item); |
60f98d18 DT |
111 | return sprintf(buf, "%s\n", cl->cl_cluster_name); |
112 | } | |
113 | ||
9ae0f367 | 114 | static ssize_t cluster_cluster_name_store(struct config_item *item, |
60f98d18 DT |
115 | const char *buf, size_t len) |
116 | { | |
9ae0f367 CH |
117 | struct dlm_cluster *cl = config_item_to_cluster(item); |
118 | ||
ad917e7f ZH |
119 | strlcpy(dlm_config.ci_cluster_name, buf, |
120 | sizeof(dlm_config.ci_cluster_name)); | |
121 | strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name)); | |
60f98d18 DT |
122 | return len; |
123 | } | |
124 | ||
9ae0f367 | 125 | CONFIGFS_ATTR(cluster_, cluster_name); |
60f98d18 | 126 | |
51409340 | 127 | static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field, |
5416b704 | 128 | int *info_field, int check_zero, |
d200778e DT |
129 | const char *buf, size_t len) |
130 | { | |
131 | unsigned int x; | |
4f4c337f | 132 | int rc; |
d200778e DT |
133 | |
134 | if (!capable(CAP_SYS_ADMIN)) | |
41735818 | 135 | return -EPERM; |
4f4c337f FF |
136 | rc = kstrtouint(buf, 0, &x); |
137 | if (rc) | |
138 | return rc; | |
d200778e DT |
139 | |
140 | if (check_zero && !x) | |
141 | return -EINVAL; | |
142 | ||
143 | *cl_field = x; | |
144 | *info_field = x; | |
145 | ||
146 | return len; | |
147 | } | |
148 | ||
d200778e | 149 | #define CLUSTER_ATTR(name, check_zero) \ |
9ae0f367 CH |
150 | static ssize_t cluster_##name##_store(struct config_item *item, \ |
151 | const char *buf, size_t len) \ | |
d200778e | 152 | { \ |
9ae0f367 | 153 | struct dlm_cluster *cl = config_item_to_cluster(item); \ |
d200778e DT |
154 | return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ |
155 | check_zero, buf, len); \ | |
156 | } \ | |
9ae0f367 | 157 | static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \ |
d200778e | 158 | { \ |
9ae0f367 | 159 | struct dlm_cluster *cl = config_item_to_cluster(item); \ |
d200778e DT |
160 | return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ |
161 | } \ | |
9ae0f367 | 162 | CONFIGFS_ATTR(cluster_, name); |
d200778e DT |
163 | |
164 | CLUSTER_ATTR(tcp_port, 1); | |
165 | CLUSTER_ATTR(buffer_size, 1); | |
166 | CLUSTER_ATTR(rsbtbl_size, 1); | |
d200778e DT |
167 | CLUSTER_ATTR(recover_timer, 1); |
168 | CLUSTER_ATTR(toss_secs, 1); | |
169 | CLUSTER_ATTR(scan_secs, 1); | |
170 | CLUSTER_ATTR(log_debug, 0); | |
505ee528 | 171 | CLUSTER_ATTR(log_info, 0); |
6ed7257b | 172 | CLUSTER_ATTR(protocol, 0); |
a5b7ab63 | 173 | CLUSTER_ATTR(mark, 0); |
3ae1acf9 | 174 | CLUSTER_ATTR(timewarn_cs, 1); |
c6ff669b | 175 | CLUSTER_ATTR(waitwarn_us, 0); |
3881ac04 | 176 | CLUSTER_ATTR(new_rsb_count, 0); |
60f98d18 | 177 | CLUSTER_ATTR(recover_callbacks, 0); |
d200778e DT |
178 | |
179 | static struct configfs_attribute *cluster_attrs[] = { | |
9ae0f367 CH |
180 | [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, |
181 | [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, | |
182 | [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, | |
183 | [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, | |
184 | [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, | |
185 | [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, | |
186 | [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, | |
505ee528 | 187 | [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info, |
9ae0f367 | 188 | [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, |
a5b7ab63 | 189 | [CLUSTER_ATTR_MARK] = &cluster_attr_mark, |
9ae0f367 CH |
190 | [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs, |
191 | [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us, | |
192 | [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, | |
193 | [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, | |
194 | [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, | |
d200778e DT |
195 | NULL, |
196 | }; | |
197 | ||
e7fd4179 DT |
198 | enum { |
199 | COMM_ATTR_NODEID = 0, | |
200 | COMM_ATTR_LOCAL, | |
201 | COMM_ATTR_ADDR, | |
55b3286d | 202 | COMM_ATTR_ADDR_LIST, |
9c9f168f | 203 | COMM_ATTR_MARK, |
e7fd4179 DT |
204 | }; |
205 | ||
e7fd4179 DT |
206 | enum { |
207 | NODE_ATTR_NODEID = 0, | |
208 | NODE_ATTR_WEIGHT, | |
209 | }; | |
210 | ||
51409340 | 211 | struct dlm_clusters { |
e7fd4179 DT |
212 | struct configfs_subsystem subsys; |
213 | }; | |
214 | ||
51409340 | 215 | struct dlm_spaces { |
e7fd4179 DT |
216 | struct config_group ss_group; |
217 | }; | |
218 | ||
51409340 | 219 | struct dlm_space { |
e7fd4179 DT |
220 | struct config_group group; |
221 | struct list_head members; | |
90135925 | 222 | struct mutex members_lock; |
e7fd4179 DT |
223 | int members_count; |
224 | }; | |
225 | ||
51409340 | 226 | struct dlm_comms { |
e7fd4179 DT |
227 | struct config_group cs_group; |
228 | }; | |
229 | ||
51409340 | 230 | struct dlm_comm { |
e7fd4179 | 231 | struct config_item item; |
60f98d18 | 232 | int seq; |
e7fd4179 DT |
233 | int nodeid; |
234 | int local; | |
235 | int addr_count; | |
9c9f168f | 236 | unsigned int mark; |
e7fd4179 DT |
237 | struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; |
238 | }; | |
239 | ||
51409340 | 240 | struct dlm_nodes { |
e7fd4179 DT |
241 | struct config_group ns_group; |
242 | }; | |
243 | ||
51409340 | 244 | struct dlm_node { |
e7fd4179 DT |
245 | struct config_item item; |
246 | struct list_head list; /* space->members */ | |
247 | int nodeid; | |
248 | int weight; | |
d44e0fc7 | 249 | int new; |
60f98d18 | 250 | int comm_seq; /* copy of cm->seq when nd->nodeid is set */ |
e7fd4179 DT |
251 | }; |
252 | ||
253 | static struct configfs_group_operations clusters_ops = { | |
254 | .make_group = make_cluster, | |
255 | .drop_item = drop_cluster, | |
256 | }; | |
257 | ||
258 | static struct configfs_item_operations cluster_ops = { | |
259 | .release = release_cluster, | |
260 | }; | |
261 | ||
262 | static struct configfs_group_operations spaces_ops = { | |
263 | .make_group = make_space, | |
264 | .drop_item = drop_space, | |
265 | }; | |
266 | ||
267 | static struct configfs_item_operations space_ops = { | |
268 | .release = release_space, | |
269 | }; | |
270 | ||
271 | static struct configfs_group_operations comms_ops = { | |
272 | .make_item = make_comm, | |
273 | .drop_item = drop_comm, | |
274 | }; | |
275 | ||
276 | static struct configfs_item_operations comm_ops = { | |
277 | .release = release_comm, | |
e7fd4179 DT |
278 | }; |
279 | ||
280 | static struct configfs_group_operations nodes_ops = { | |
281 | .make_item = make_node, | |
282 | .drop_item = drop_node, | |
283 | }; | |
284 | ||
285 | static struct configfs_item_operations node_ops = { | |
286 | .release = release_node, | |
e7fd4179 DT |
287 | }; |
288 | ||
761594b7 | 289 | static const struct config_item_type clusters_type = { |
e7fd4179 DT |
290 | .ct_group_ops = &clusters_ops, |
291 | .ct_owner = THIS_MODULE, | |
292 | }; | |
293 | ||
761594b7 | 294 | static const struct config_item_type cluster_type = { |
e7fd4179 | 295 | .ct_item_ops = &cluster_ops, |
d200778e | 296 | .ct_attrs = cluster_attrs, |
e7fd4179 DT |
297 | .ct_owner = THIS_MODULE, |
298 | }; | |
299 | ||
761594b7 | 300 | static const struct config_item_type spaces_type = { |
e7fd4179 DT |
301 | .ct_group_ops = &spaces_ops, |
302 | .ct_owner = THIS_MODULE, | |
303 | }; | |
304 | ||
761594b7 | 305 | static const struct config_item_type space_type = { |
e7fd4179 DT |
306 | .ct_item_ops = &space_ops, |
307 | .ct_owner = THIS_MODULE, | |
308 | }; | |
309 | ||
761594b7 | 310 | static const struct config_item_type comms_type = { |
e7fd4179 DT |
311 | .ct_group_ops = &comms_ops, |
312 | .ct_owner = THIS_MODULE, | |
313 | }; | |
314 | ||
761594b7 | 315 | static const struct config_item_type comm_type = { |
e7fd4179 DT |
316 | .ct_item_ops = &comm_ops, |
317 | .ct_attrs = comm_attrs, | |
318 | .ct_owner = THIS_MODULE, | |
319 | }; | |
320 | ||
761594b7 | 321 | static const struct config_item_type nodes_type = { |
e7fd4179 DT |
322 | .ct_group_ops = &nodes_ops, |
323 | .ct_owner = THIS_MODULE, | |
324 | }; | |
325 | ||
761594b7 | 326 | static const struct config_item_type node_type = { |
e7fd4179 DT |
327 | .ct_item_ops = &node_ops, |
328 | .ct_attrs = node_attrs, | |
329 | .ct_owner = THIS_MODULE, | |
330 | }; | |
331 | ||
27eccf46 | 332 | static struct dlm_space *config_item_to_space(struct config_item *i) |
e7fd4179 | 333 | { |
51409340 DT |
334 | return i ? container_of(to_config_group(i), struct dlm_space, group) : |
335 | NULL; | |
e7fd4179 DT |
336 | } |
337 | ||
27eccf46 | 338 | static struct dlm_comm *config_item_to_comm(struct config_item *i) |
e7fd4179 | 339 | { |
51409340 | 340 | return i ? container_of(i, struct dlm_comm, item) : NULL; |
e7fd4179 DT |
341 | } |
342 | ||
27eccf46 | 343 | static struct dlm_node *config_item_to_node(struct config_item *i) |
e7fd4179 | 344 | { |
51409340 | 345 | return i ? container_of(i, struct dlm_node, item) : NULL; |
e7fd4179 DT |
346 | } |
347 | ||
f89ab861 JB |
348 | static struct config_group *make_cluster(struct config_group *g, |
349 | const char *name) | |
e7fd4179 | 350 | { |
51409340 DT |
351 | struct dlm_cluster *cl = NULL; |
352 | struct dlm_spaces *sps = NULL; | |
353 | struct dlm_comms *cms = NULL; | |
e7fd4179 | 354 | |
573c24c4 | 355 | cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS); |
573c24c4 DT |
356 | sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS); |
357 | cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS); | |
e7fd4179 | 358 | |
82c7d823 | 359 | if (!cl || !sps || !cms) |
e7fd4179 DT |
360 | goto fail; |
361 | ||
362 | config_group_init_type_name(&cl->group, name, &cluster_type); | |
363 | config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type); | |
364 | config_group_init_type_name(&cms->cs_group, "comms", &comms_type); | |
365 | ||
1ae1602d CH |
366 | configfs_add_default_group(&sps->ss_group, &cl->group); |
367 | configfs_add_default_group(&cms->cs_group, &cl->group); | |
e7fd4179 | 368 | |
d200778e DT |
369 | cl->cl_tcp_port = dlm_config.ci_tcp_port; |
370 | cl->cl_buffer_size = dlm_config.ci_buffer_size; | |
371 | cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; | |
d200778e DT |
372 | cl->cl_recover_timer = dlm_config.ci_recover_timer; |
373 | cl->cl_toss_secs = dlm_config.ci_toss_secs; | |
374 | cl->cl_scan_secs = dlm_config.ci_scan_secs; | |
375 | cl->cl_log_debug = dlm_config.ci_log_debug; | |
505ee528 | 376 | cl->cl_log_info = dlm_config.ci_log_info; |
0b7cac0f | 377 | cl->cl_protocol = dlm_config.ci_protocol; |
84d8cd69 | 378 | cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs; |
c6ff669b | 379 | cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us; |
3881ac04 | 380 | cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; |
60f98d18 DT |
381 | cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; |
382 | memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, | |
383 | DLM_LOCKSPACE_LEN); | |
d200778e | 384 | |
e7fd4179 DT |
385 | space_list = &sps->ss_group; |
386 | comm_list = &cms->cs_group; | |
f89ab861 | 387 | return &cl->group; |
e7fd4179 DT |
388 | |
389 | fail: | |
390 | kfree(cl); | |
e7fd4179 DT |
391 | kfree(sps); |
392 | kfree(cms); | |
a6795e9e | 393 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
394 | } |
395 | ||
396 | static void drop_cluster(struct config_group *g, struct config_item *i) | |
397 | { | |
27eccf46 | 398 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 | 399 | |
1ae1602d | 400 | configfs_remove_default_groups(&cl->group); |
e7fd4179 DT |
401 | |
402 | space_list = NULL; | |
403 | comm_list = NULL; | |
404 | ||
405 | config_item_put(i); | |
406 | } | |
407 | ||
408 | static void release_cluster(struct config_item *i) | |
409 | { | |
27eccf46 | 410 | struct dlm_cluster *cl = config_item_to_cluster(i); |
e7fd4179 DT |
411 | kfree(cl); |
412 | } | |
413 | ||
f89ab861 | 414 | static struct config_group *make_space(struct config_group *g, const char *name) |
e7fd4179 | 415 | { |
51409340 DT |
416 | struct dlm_space *sp = NULL; |
417 | struct dlm_nodes *nds = NULL; | |
e7fd4179 | 418 | |
573c24c4 | 419 | sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS); |
573c24c4 | 420 | nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS); |
e7fd4179 | 421 | |
1ae1602d | 422 | if (!sp || !nds) |
e7fd4179 DT |
423 | goto fail; |
424 | ||
425 | config_group_init_type_name(&sp->group, name, &space_type); | |
e7fd4179 | 426 | |
1ae1602d CH |
427 | config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type); |
428 | configfs_add_default_group(&nds->ns_group, &sp->group); | |
e7fd4179 DT |
429 | |
430 | INIT_LIST_HEAD(&sp->members); | |
90135925 | 431 | mutex_init(&sp->members_lock); |
e7fd4179 | 432 | sp->members_count = 0; |
f89ab861 | 433 | return &sp->group; |
e7fd4179 DT |
434 | |
435 | fail: | |
436 | kfree(sp); | |
e7fd4179 | 437 | kfree(nds); |
a6795e9e | 438 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
439 | } |
440 | ||
441 | static void drop_space(struct config_group *g, struct config_item *i) | |
442 | { | |
27eccf46 | 443 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
444 | |
445 | /* assert list_empty(&sp->members) */ | |
446 | ||
1ae1602d | 447 | configfs_remove_default_groups(&sp->group); |
e7fd4179 DT |
448 | config_item_put(i); |
449 | } | |
450 | ||
451 | static void release_space(struct config_item *i) | |
452 | { | |
27eccf46 | 453 | struct dlm_space *sp = config_item_to_space(i); |
e7fd4179 DT |
454 | kfree(sp); |
455 | } | |
456 | ||
f89ab861 | 457 | static struct config_item *make_comm(struct config_group *g, const char *name) |
e7fd4179 | 458 | { |
51409340 | 459 | struct dlm_comm *cm; |
e7fd4179 | 460 | |
573c24c4 | 461 | cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS); |
e7fd4179 | 462 | if (!cm) |
a6795e9e | 463 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
464 | |
465 | config_item_init_type_name(&cm->item, name, &comm_type); | |
60f98d18 DT |
466 | |
467 | cm->seq = dlm_comm_count++; | |
468 | if (!cm->seq) | |
469 | cm->seq = dlm_comm_count++; | |
470 | ||
e7fd4179 DT |
471 | cm->nodeid = -1; |
472 | cm->local = 0; | |
473 | cm->addr_count = 0; | |
9c9f168f | 474 | cm->mark = 0; |
f89ab861 | 475 | return &cm->item; |
e7fd4179 DT |
476 | } |
477 | ||
478 | static void drop_comm(struct config_group *g, struct config_item *i) | |
479 | { | |
27eccf46 | 480 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
481 | if (local_comm == cm) |
482 | local_comm = NULL; | |
1c032c03 | 483 | dlm_lowcomms_close(cm->nodeid); |
e7fd4179 DT |
484 | while (cm->addr_count--) |
485 | kfree(cm->addr[cm->addr_count]); | |
486 | config_item_put(i); | |
487 | } | |
488 | ||
489 | static void release_comm(struct config_item *i) | |
490 | { | |
27eccf46 | 491 | struct dlm_comm *cm = config_item_to_comm(i); |
e7fd4179 DT |
492 | kfree(cm); |
493 | } | |
494 | ||
f89ab861 | 495 | static struct config_item *make_node(struct config_group *g, const char *name) |
e7fd4179 | 496 | { |
27eccf46 | 497 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
51409340 | 498 | struct dlm_node *nd; |
e7fd4179 | 499 | |
573c24c4 | 500 | nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS); |
e7fd4179 | 501 | if (!nd) |
a6795e9e | 502 | return ERR_PTR(-ENOMEM); |
e7fd4179 DT |
503 | |
504 | config_item_init_type_name(&nd->item, name, &node_type); | |
505 | nd->nodeid = -1; | |
506 | nd->weight = 1; /* default weight of 1 if none is set */ | |
d44e0fc7 | 507 | nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ |
e7fd4179 | 508 | |
90135925 | 509 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
510 | list_add(&nd->list, &sp->members); |
511 | sp->members_count++; | |
90135925 | 512 | mutex_unlock(&sp->members_lock); |
e7fd4179 | 513 | |
f89ab861 | 514 | return &nd->item; |
e7fd4179 DT |
515 | } |
516 | ||
517 | static void drop_node(struct config_group *g, struct config_item *i) | |
518 | { | |
27eccf46 AM |
519 | struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent); |
520 | struct dlm_node *nd = config_item_to_node(i); | |
e7fd4179 | 521 | |
90135925 | 522 | mutex_lock(&sp->members_lock); |
e7fd4179 DT |
523 | list_del(&nd->list); |
524 | sp->members_count--; | |
90135925 | 525 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
526 | |
527 | config_item_put(i); | |
528 | } | |
529 | ||
530 | static void release_node(struct config_item *i) | |
531 | { | |
27eccf46 | 532 | struct dlm_node *nd = config_item_to_node(i); |
e7fd4179 DT |
533 | kfree(nd); |
534 | } | |
535 | ||
51409340 | 536 | static struct dlm_clusters clusters_root = { |
e7fd4179 DT |
537 | .subsys = { |
538 | .su_group = { | |
539 | .cg_item = { | |
540 | .ci_namebuf = "dlm", | |
541 | .ci_type = &clusters_type, | |
542 | }, | |
543 | }, | |
544 | }, | |
545 | }; | |
546 | ||
30727174 | 547 | int __init dlm_config_init(void) |
e7fd4179 DT |
548 | { |
549 | config_group_init(&clusters_root.subsys.su_group); | |
e6bd07ae | 550 | mutex_init(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
551 | return configfs_register_subsystem(&clusters_root.subsys); |
552 | } | |
553 | ||
554 | void dlm_config_exit(void) | |
555 | { | |
556 | configfs_unregister_subsystem(&clusters_root.subsys); | |
557 | } | |
558 | ||
559 | /* | |
560 | * Functions for user space to read/write attributes | |
561 | */ | |
562 | ||
9ae0f367 | 563 | static ssize_t comm_nodeid_show(struct config_item *item, char *buf) |
d200778e | 564 | { |
9ae0f367 | 565 | return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid); |
e7fd4179 DT |
566 | } |
567 | ||
9ae0f367 | 568 | static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 569 | size_t len) |
e7fd4179 | 570 | { |
9ae0f367 | 571 | int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid); |
4f4c337f FF |
572 | |
573 | if (rc) | |
574 | return rc; | |
e7fd4179 DT |
575 | return len; |
576 | } | |
577 | ||
9ae0f367 | 578 | static ssize_t comm_local_show(struct config_item *item, char *buf) |
e7fd4179 | 579 | { |
9ae0f367 | 580 | return sprintf(buf, "%d\n", config_item_to_comm(item)->local); |
e7fd4179 DT |
581 | } |
582 | ||
9ae0f367 | 583 | static ssize_t comm_local_store(struct config_item *item, const char *buf, |
51409340 | 584 | size_t len) |
e7fd4179 | 585 | { |
9ae0f367 | 586 | struct dlm_comm *cm = config_item_to_comm(item); |
4f4c337f FF |
587 | int rc = kstrtoint(buf, 0, &cm->local); |
588 | ||
589 | if (rc) | |
590 | return rc; | |
e7fd4179 DT |
591 | if (cm->local && !local_comm) |
592 | local_comm = cm; | |
593 | return len; | |
594 | } | |
595 | ||
9ae0f367 CH |
596 | static ssize_t comm_addr_store(struct config_item *item, const char *buf, |
597 | size_t len) | |
e7fd4179 | 598 | { |
9ae0f367 | 599 | struct dlm_comm *cm = config_item_to_comm(item); |
e7fd4179 | 600 | struct sockaddr_storage *addr; |
36b71a8b | 601 | int rv; |
e7fd4179 DT |
602 | |
603 | if (len != sizeof(struct sockaddr_storage)) | |
604 | return -EINVAL; | |
605 | ||
606 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) | |
607 | return -ENOSPC; | |
608 | ||
573c24c4 | 609 | addr = kzalloc(sizeof(*addr), GFP_NOFS); |
e7fd4179 DT |
610 | if (!addr) |
611 | return -ENOMEM; | |
612 | ||
613 | memcpy(addr, buf, len); | |
36b71a8b DT |
614 | |
615 | rv = dlm_lowcomms_addr(cm->nodeid, addr, len); | |
616 | if (rv) { | |
617 | kfree(addr); | |
618 | return rv; | |
619 | } | |
620 | ||
e7fd4179 DT |
621 | cm->addr[cm->addr_count++] = addr; |
622 | return len; | |
623 | } | |
624 | ||
9ae0f367 | 625 | static ssize_t comm_addr_list_show(struct config_item *item, char *buf) |
55b3286d | 626 | { |
9ae0f367 | 627 | struct dlm_comm *cm = config_item_to_comm(item); |
55b3286d MY |
628 | ssize_t s; |
629 | ssize_t allowance; | |
630 | int i; | |
631 | struct sockaddr_storage *addr; | |
632 | struct sockaddr_in *addr_in; | |
633 | struct sockaddr_in6 *addr_in6; | |
634 | ||
635 | /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ | |
636 | char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")]; | |
637 | ||
638 | ||
639 | /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ | |
640 | allowance = 4096; | |
641 | buf[0] = '\0'; | |
642 | ||
643 | for (i = 0; i < cm->addr_count; i++) { | |
644 | addr = cm->addr[i]; | |
645 | ||
646 | switch(addr->ss_family) { | |
647 | case AF_INET: | |
648 | addr_in = (struct sockaddr_in *)addr; | |
649 | s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr); | |
650 | break; | |
651 | case AF_INET6: | |
652 | addr_in6 = (struct sockaddr_in6 *)addr; | |
653 | s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr); | |
654 | break; | |
655 | default: | |
656 | s = sprintf(buf0, "%s\n", "<UNKNOWN>"); | |
657 | break; | |
658 | } | |
659 | allowance -= s; | |
660 | if (allowance >= 0) | |
661 | strcat(buf, buf0); | |
662 | else { | |
663 | allowance += s; | |
664 | break; | |
665 | } | |
666 | } | |
667 | return 4096 - allowance; | |
668 | } | |
669 | ||
9c9f168f AA |
670 | static ssize_t comm_mark_show(struct config_item *item, char *buf) |
671 | { | |
672 | return sprintf(buf, "%u\n", config_item_to_comm(item)->mark); | |
673 | } | |
674 | ||
675 | static ssize_t comm_mark_store(struct config_item *item, const char *buf, | |
676 | size_t len) | |
677 | { | |
678 | unsigned int mark; | |
679 | int rc; | |
680 | ||
681 | rc = kstrtouint(buf, 0, &mark); | |
682 | if (rc) | |
683 | return rc; | |
684 | ||
685 | config_item_to_comm(item)->mark = mark; | |
686 | return len; | |
687 | } | |
688 | ||
9ae0f367 CH |
689 | CONFIGFS_ATTR(comm_, nodeid); |
690 | CONFIGFS_ATTR(comm_, local); | |
9c9f168f | 691 | CONFIGFS_ATTR(comm_, mark); |
9ae0f367 CH |
692 | CONFIGFS_ATTR_WO(comm_, addr); |
693 | CONFIGFS_ATTR_RO(comm_, addr_list); | |
e7fd4179 | 694 | |
9ae0f367 CH |
695 | static struct configfs_attribute *comm_attrs[] = { |
696 | [COMM_ATTR_NODEID] = &comm_attr_nodeid, | |
697 | [COMM_ATTR_LOCAL] = &comm_attr_local, | |
698 | [COMM_ATTR_ADDR] = &comm_attr_addr, | |
699 | [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, | |
9c9f168f | 700 | [COMM_ATTR_MARK] = &comm_attr_mark, |
9ae0f367 CH |
701 | NULL, |
702 | }; | |
e7fd4179 | 703 | |
9ae0f367 | 704 | static ssize_t node_nodeid_show(struct config_item *item, char *buf) |
e7fd4179 | 705 | { |
9ae0f367 | 706 | return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid); |
e7fd4179 DT |
707 | } |
708 | ||
9ae0f367 | 709 | static ssize_t node_nodeid_store(struct config_item *item, const char *buf, |
51409340 | 710 | size_t len) |
e7fd4179 | 711 | { |
9ae0f367 | 712 | struct dlm_node *nd = config_item_to_node(item); |
60f98d18 | 713 | uint32_t seq = 0; |
4f4c337f FF |
714 | int rc = kstrtoint(buf, 0, &nd->nodeid); |
715 | ||
716 | if (rc) | |
717 | return rc; | |
60f98d18 DT |
718 | dlm_comm_seq(nd->nodeid, &seq); |
719 | nd->comm_seq = seq; | |
e7fd4179 DT |
720 | return len; |
721 | } | |
722 | ||
9ae0f367 | 723 | static ssize_t node_weight_show(struct config_item *item, char *buf) |
e7fd4179 | 724 | { |
9ae0f367 | 725 | return sprintf(buf, "%d\n", config_item_to_node(item)->weight); |
e7fd4179 DT |
726 | } |
727 | ||
9ae0f367 | 728 | static ssize_t node_weight_store(struct config_item *item, const char *buf, |
51409340 | 729 | size_t len) |
e7fd4179 | 730 | { |
9ae0f367 | 731 | int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight); |
4f4c337f FF |
732 | |
733 | if (rc) | |
734 | return rc; | |
e7fd4179 DT |
735 | return len; |
736 | } | |
737 | ||
9ae0f367 CH |
738 | CONFIGFS_ATTR(node_, nodeid); |
739 | CONFIGFS_ATTR(node_, weight); | |
740 | ||
741 | static struct configfs_attribute *node_attrs[] = { | |
742 | [NODE_ATTR_NODEID] = &node_attr_nodeid, | |
743 | [NODE_ATTR_WEIGHT] = &node_attr_weight, | |
744 | NULL, | |
745 | }; | |
746 | ||
e7fd4179 DT |
747 | /* |
748 | * Functions for the dlm to get the info that's been configured | |
749 | */ | |
750 | ||
51409340 | 751 | static struct dlm_space *get_space(char *name) |
e7fd4179 | 752 | { |
3168b078 SS |
753 | struct config_item *i; |
754 | ||
e7fd4179 DT |
755 | if (!space_list) |
756 | return NULL; | |
3168b078 | 757 | |
e6bd07ae | 758 | mutex_lock(&space_list->cg_subsys->su_mutex); |
3fe6c5ce | 759 | i = config_group_find_item(space_list, name); |
e6bd07ae | 760 | mutex_unlock(&space_list->cg_subsys->su_mutex); |
3168b078 | 761 | |
27eccf46 | 762 | return config_item_to_space(i); |
e7fd4179 DT |
763 | } |
764 | ||
51409340 | 765 | static void put_space(struct dlm_space *sp) |
e7fd4179 DT |
766 | { |
767 | config_item_put(&sp->group.cg_item); | |
768 | } | |
769 | ||
36b71a8b | 770 | static struct dlm_comm *get_comm(int nodeid) |
e7fd4179 DT |
771 | { |
772 | struct config_item *i; | |
51409340 | 773 | struct dlm_comm *cm = NULL; |
e7fd4179 DT |
774 | int found = 0; |
775 | ||
776 | if (!comm_list) | |
777 | return NULL; | |
778 | ||
e6bd07ae | 779 | mutex_lock(&clusters_root.subsys.su_mutex); |
e7fd4179 DT |
780 | |
781 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { | |
27eccf46 | 782 | cm = config_item_to_comm(i); |
e7fd4179 | 783 | |
36b71a8b DT |
784 | if (cm->nodeid != nodeid) |
785 | continue; | |
786 | found = 1; | |
787 | config_item_get(i); | |
788 | break; | |
e7fd4179 | 789 | } |
e6bd07ae | 790 | mutex_unlock(&clusters_root.subsys.su_mutex); |
e7fd4179 | 791 | |
3168b078 | 792 | if (!found) |
e7fd4179 DT |
793 | cm = NULL; |
794 | return cm; | |
795 | } | |
796 | ||
51409340 | 797 | static void put_comm(struct dlm_comm *cm) |
e7fd4179 DT |
798 | { |
799 | config_item_put(&cm->item); | |
800 | } | |
801 | ||
802 | /* caller must free mem */ | |
60f98d18 DT |
803 | int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, |
804 | int *count_out) | |
e7fd4179 | 805 | { |
51409340 DT |
806 | struct dlm_space *sp; |
807 | struct dlm_node *nd; | |
60f98d18 DT |
808 | struct dlm_config_node *nodes, *node; |
809 | int rv, count; | |
e7fd4179 DT |
810 | |
811 | sp = get_space(lsname); | |
812 | if (!sp) | |
813 | return -EEXIST; | |
814 | ||
90135925 | 815 | mutex_lock(&sp->members_lock); |
e7fd4179 | 816 | if (!sp->members_count) { |
d44e0fc7 DT |
817 | rv = -EINVAL; |
818 | printk(KERN_ERR "dlm: zero members_count\n"); | |
e7fd4179 DT |
819 | goto out; |
820 | } | |
821 | ||
60f98d18 | 822 | count = sp->members_count; |
d44e0fc7 | 823 | |
60f98d18 DT |
824 | nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS); |
825 | if (!nodes) { | |
e7fd4179 DT |
826 | rv = -ENOMEM; |
827 | goto out; | |
828 | } | |
829 | ||
60f98d18 | 830 | node = nodes; |
d44e0fc7 | 831 | list_for_each_entry(nd, &sp->members, list) { |
60f98d18 DT |
832 | node->nodeid = nd->nodeid; |
833 | node->weight = nd->weight; | |
834 | node->new = nd->new; | |
835 | node->comm_seq = nd->comm_seq; | |
836 | node++; | |
d44e0fc7 | 837 | |
60f98d18 | 838 | nd->new = 0; |
d44e0fc7 | 839 | } |
e7fd4179 | 840 | |
60f98d18 DT |
841 | *count_out = count; |
842 | *nodes_out = nodes; | |
843 | rv = 0; | |
e7fd4179 | 844 | out: |
90135925 | 845 | mutex_unlock(&sp->members_lock); |
e7fd4179 DT |
846 | put_space(sp); |
847 | return rv; | |
848 | } | |
849 | ||
60f98d18 | 850 | int dlm_comm_seq(int nodeid, uint32_t *seq) |
e7fd4179 | 851 | { |
36b71a8b | 852 | struct dlm_comm *cm = get_comm(nodeid); |
60f98d18 DT |
853 | if (!cm) |
854 | return -EEXIST; | |
855 | *seq = cm->seq; | |
856 | put_comm(cm); | |
857 | return 0; | |
e7fd4179 DT |
858 | } |
859 | ||
9c9f168f AA |
860 | int dlm_comm_mark(int nodeid, unsigned int *mark) |
861 | { | |
862 | struct dlm_comm *cm; | |
863 | ||
864 | cm = get_comm(nodeid); | |
865 | if (!cm) | |
866 | return -ENOENT; | |
867 | ||
868 | *mark = cm->mark; | |
869 | put_comm(cm); | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
e7fd4179 DT |
874 | int dlm_our_nodeid(void) |
875 | { | |
876 | return local_comm ? local_comm->nodeid : 0; | |
877 | } | |
878 | ||
879 | /* num 0 is first addr, num 1 is second addr */ | |
880 | int dlm_our_addr(struct sockaddr_storage *addr, int num) | |
881 | { | |
882 | if (!local_comm) | |
883 | return -1; | |
884 | if (num + 1 > local_comm->addr_count) | |
885 | return -1; | |
886 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); | |
887 | return 0; | |
888 | } | |
889 | ||
890 | /* Config file defaults */ | |
891 | #define DEFAULT_TCP_PORT 21064 | |
892 | #define DEFAULT_BUFFER_SIZE 4096 | |
e3853a90 | 893 | #define DEFAULT_RSBTBL_SIZE 1024 |
e7fd4179 DT |
894 | #define DEFAULT_RECOVER_TIMER 5 |
895 | #define DEFAULT_TOSS_SECS 10 | |
896 | #define DEFAULT_SCAN_SECS 5 | |
99fc6487 | 897 | #define DEFAULT_LOG_DEBUG 0 |
505ee528 | 898 | #define DEFAULT_LOG_INFO 1 |
6ed7257b | 899 | #define DEFAULT_PROTOCOL 0 |
a5b7ab63 | 900 | #define DEFAULT_MARK 0 |
3ae1acf9 | 901 | #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */ |
c6ff669b | 902 | #define DEFAULT_WAITWARN_US 0 |
3881ac04 | 903 | #define DEFAULT_NEW_RSB_COUNT 128 |
60f98d18 DT |
904 | #define DEFAULT_RECOVER_CALLBACKS 0 |
905 | #define DEFAULT_CLUSTER_NAME "" | |
e7fd4179 DT |
906 | |
907 | struct dlm_config_info dlm_config = { | |
68c817a1 DT |
908 | .ci_tcp_port = DEFAULT_TCP_PORT, |
909 | .ci_buffer_size = DEFAULT_BUFFER_SIZE, | |
910 | .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, | |
68c817a1 DT |
911 | .ci_recover_timer = DEFAULT_RECOVER_TIMER, |
912 | .ci_toss_secs = DEFAULT_TOSS_SECS, | |
99fc6487 | 913 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
6ed7257b | 914 | .ci_log_debug = DEFAULT_LOG_DEBUG, |
505ee528 | 915 | .ci_log_info = DEFAULT_LOG_INFO, |
3ae1acf9 | 916 | .ci_protocol = DEFAULT_PROTOCOL, |
a5b7ab63 | 917 | .ci_mark = DEFAULT_MARK, |
c6ff669b | 918 | .ci_timewarn_cs = DEFAULT_TIMEWARN_CS, |
3881ac04 | 919 | .ci_waitwarn_us = DEFAULT_WAITWARN_US, |
60f98d18 DT |
920 | .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, |
921 | .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, | |
922 | .ci_cluster_name = DEFAULT_CLUSTER_NAME | |
e7fd4179 DT |
923 | }; |
924 |