1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /****************************************************************************** |
3 | ******************************************************************************* |
4 | ** |
5 | ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
6 | ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
7 | ** |
8 | ** |
9 | ******************************************************************************* |
10 | ******************************************************************************/ |
11 | |
12 | #include <linux/kernel.h> |
13 | #include <linux/init.h> |
14 | #include <linux/configfs.h> |
15 | #include <linux/slab.h> |
16 | #include <linux/in.h> |
17 | #include <linux/in6.h> |
18 | #include <linux/dlmconstants.h> |
19 | #include <net/ipv6.h> |
20 | #include <net/sock.h> |
21 | |
22 | #include "config.h" |
23 | #include "midcomms.h" |
24 | #include "lowcomms.h" |
25 | |
26 | /* |
27 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid |
28 | * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight |
29 | * /config/dlm/<cluster>/comms/<comm>/nodeid |
30 | * /config/dlm/<cluster>/comms/<comm>/local |
31 | * /config/dlm/<cluster>/comms/<comm>/addr (write only) |
32 | * /config/dlm/<cluster>/comms/<comm>/addr_list (read only) |
33 | * The <cluster> level is useless, but I haven't figured out how to avoid it. |
34 | */ |
35 | |
36 | static struct config_group *space_list; |
37 | static struct config_group *comm_list; |
38 | static struct dlm_comm *local_comm; |
39 | static uint32_t dlm_comm_count; |
40 | |
41 | struct dlm_clusters; |
42 | struct dlm_cluster; |
43 | struct dlm_spaces; |
44 | struct dlm_space; |
45 | struct dlm_comms; |
46 | struct dlm_comm; |
47 | struct dlm_nodes; |
48 | struct dlm_node; |
49 | |
50 | static struct config_group *make_cluster(struct config_group *, const char *); |
51 | static void drop_cluster(struct config_group *, struct config_item *); |
52 | static void release_cluster(struct config_item *); |
53 | static struct config_group *make_space(struct config_group *, const char *); |
54 | static void drop_space(struct config_group *, struct config_item *); |
55 | static void release_space(struct config_item *); |
56 | static struct config_item *make_comm(struct config_group *, const char *); |
57 | static void drop_comm(struct config_group *, struct config_item *); |
58 | static void release_comm(struct config_item *); |
59 | static struct config_item *make_node(struct config_group *, const char *); |
60 | static void drop_node(struct config_group *, struct config_item *); |
61 | static void release_node(struct config_item *); |
62 | |
63 | static struct configfs_attribute *comm_attrs[]; |
64 | static struct configfs_attribute *node_attrs[]; |
65 | |
66 | struct dlm_cluster { |
67 | struct config_group group; |
68 | unsigned int cl_tcp_port; |
69 | unsigned int cl_buffer_size; |
70 | unsigned int cl_rsbtbl_size; |
71 | unsigned int cl_recover_timer; |
72 | unsigned int cl_toss_secs; |
73 | unsigned int cl_scan_secs; |
74 | unsigned int cl_log_debug; |
75 | unsigned int cl_log_info; |
76 | unsigned int cl_protocol; |
77 | unsigned int cl_mark; |
78 | unsigned int cl_new_rsb_count; |
79 | unsigned int cl_recover_callbacks; |
80 | char cl_cluster_name[DLM_LOCKSPACE_LEN]; |
81 | |
82 | struct dlm_spaces *sps; |
83 | struct dlm_comms *cms; |
84 | }; |
85 | |
86 | static struct dlm_cluster *config_item_to_cluster(struct config_item *i) |
87 | { |
88 | return i ? container_of(to_config_group(i), struct dlm_cluster, group) : |
89 | NULL; |
90 | } |
91 | |
92 | enum { |
93 | CLUSTER_ATTR_TCP_PORT = 0, |
94 | CLUSTER_ATTR_BUFFER_SIZE, |
95 | CLUSTER_ATTR_RSBTBL_SIZE, |
96 | CLUSTER_ATTR_RECOVER_TIMER, |
97 | CLUSTER_ATTR_TOSS_SECS, |
98 | CLUSTER_ATTR_SCAN_SECS, |
99 | CLUSTER_ATTR_LOG_DEBUG, |
100 | CLUSTER_ATTR_LOG_INFO, |
101 | CLUSTER_ATTR_PROTOCOL, |
102 | CLUSTER_ATTR_MARK, |
103 | CLUSTER_ATTR_NEW_RSB_COUNT, |
104 | CLUSTER_ATTR_RECOVER_CALLBACKS, |
105 | CLUSTER_ATTR_CLUSTER_NAME, |
106 | }; |
107 | |
108 | static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf) |
109 | { |
110 | struct dlm_cluster *cl = config_item_to_cluster(i: item); |
111 | return sprintf(buf, fmt: "%s\n" , cl->cl_cluster_name); |
112 | } |
113 | |
114 | static ssize_t cluster_cluster_name_store(struct config_item *item, |
115 | const char *buf, size_t len) |
116 | { |
117 | struct dlm_cluster *cl = config_item_to_cluster(i: item); |
118 | |
119 | strscpy(p: dlm_config.ci_cluster_name, q: buf, |
120 | size: sizeof(dlm_config.ci_cluster_name)); |
121 | strscpy(p: cl->cl_cluster_name, q: buf, size: sizeof(cl->cl_cluster_name)); |
122 | return len; |
123 | } |
124 | |
125 | CONFIGFS_ATTR(cluster_, cluster_name); |
126 | |
127 | static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field, |
128 | int *info_field, int (*check_cb)(unsigned int x), |
129 | const char *buf, size_t len) |
130 | { |
131 | unsigned int x; |
132 | int rc; |
133 | |
134 | if (!capable(CAP_SYS_ADMIN)) |
135 | return -EPERM; |
136 | rc = kstrtouint(s: buf, base: 0, res: &x); |
137 | if (rc) |
138 | return rc; |
139 | |
140 | if (check_cb) { |
141 | rc = check_cb(x); |
142 | if (rc) |
143 | return rc; |
144 | } |
145 | |
146 | *cl_field = x; |
147 | *info_field = x; |
148 | |
149 | return len; |
150 | } |
151 | |
152 | #define CLUSTER_ATTR(name, check_cb) \ |
153 | static ssize_t cluster_##name##_store(struct config_item *item, \ |
154 | const char *buf, size_t len) \ |
155 | { \ |
156 | struct dlm_cluster *cl = config_item_to_cluster(item); \ |
157 | return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \ |
158 | check_cb, buf, len); \ |
159 | } \ |
160 | static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \ |
161 | { \ |
162 | struct dlm_cluster *cl = config_item_to_cluster(item); \ |
163 | return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \ |
164 | } \ |
165 | CONFIGFS_ATTR(cluster_, name); |
166 | |
167 | static int dlm_check_protocol_and_dlm_running(unsigned int x) |
168 | { |
169 | switch (x) { |
170 | case 0: |
171 | /* TCP */ |
172 | break; |
173 | case 1: |
174 | /* SCTP */ |
175 | break; |
176 | default: |
177 | return -EINVAL; |
178 | } |
179 | |
180 | if (dlm_lowcomms_is_running()) |
181 | return -EBUSY; |
182 | |
183 | return 0; |
184 | } |
185 | |
186 | static int dlm_check_zero_and_dlm_running(unsigned int x) |
187 | { |
188 | if (!x) |
189 | return -EINVAL; |
190 | |
191 | if (dlm_lowcomms_is_running()) |
192 | return -EBUSY; |
193 | |
194 | return 0; |
195 | } |
196 | |
197 | static int dlm_check_zero(unsigned int x) |
198 | { |
199 | if (!x) |
200 | return -EINVAL; |
201 | |
202 | return 0; |
203 | } |
204 | |
205 | static int dlm_check_buffer_size(unsigned int x) |
206 | { |
207 | if (x < DLM_MAX_SOCKET_BUFSIZE) |
208 | return -EINVAL; |
209 | |
210 | return 0; |
211 | } |
212 | |
213 | CLUSTER_ATTR(tcp_port, dlm_check_zero_and_dlm_running); |
214 | CLUSTER_ATTR(buffer_size, dlm_check_buffer_size); |
215 | CLUSTER_ATTR(rsbtbl_size, dlm_check_zero); |
216 | CLUSTER_ATTR(recover_timer, dlm_check_zero); |
217 | CLUSTER_ATTR(toss_secs, dlm_check_zero); |
218 | CLUSTER_ATTR(scan_secs, dlm_check_zero); |
219 | CLUSTER_ATTR(log_debug, NULL); |
220 | CLUSTER_ATTR(log_info, NULL); |
221 | CLUSTER_ATTR(protocol, dlm_check_protocol_and_dlm_running); |
222 | CLUSTER_ATTR(mark, NULL); |
223 | CLUSTER_ATTR(new_rsb_count, NULL); |
224 | CLUSTER_ATTR(recover_callbacks, NULL); |
225 | |
226 | static struct configfs_attribute *cluster_attrs[] = { |
227 | [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port, |
228 | [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size, |
229 | [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size, |
230 | [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer, |
231 | [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs, |
232 | [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs, |
233 | [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug, |
234 | [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info, |
235 | [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol, |
236 | [CLUSTER_ATTR_MARK] = &cluster_attr_mark, |
237 | [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count, |
238 | [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks, |
239 | [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name, |
240 | NULL, |
241 | }; |
242 | |
243 | enum { |
244 | COMM_ATTR_NODEID = 0, |
245 | COMM_ATTR_LOCAL, |
246 | COMM_ATTR_ADDR, |
247 | COMM_ATTR_ADDR_LIST, |
248 | COMM_ATTR_MARK, |
249 | }; |
250 | |
251 | enum { |
252 | NODE_ATTR_NODEID = 0, |
253 | NODE_ATTR_WEIGHT, |
254 | }; |
255 | |
256 | struct dlm_clusters { |
257 | struct configfs_subsystem subsys; |
258 | }; |
259 | |
260 | struct dlm_spaces { |
261 | struct config_group ss_group; |
262 | }; |
263 | |
264 | struct dlm_space { |
265 | struct config_group group; |
266 | struct list_head members; |
267 | struct mutex members_lock; |
268 | int members_count; |
269 | struct dlm_nodes *nds; |
270 | }; |
271 | |
272 | struct dlm_comms { |
273 | struct config_group cs_group; |
274 | }; |
275 | |
276 | struct dlm_comm { |
277 | struct config_item item; |
278 | int seq; |
279 | int nodeid; |
280 | int local; |
281 | int addr_count; |
282 | unsigned int mark; |
283 | struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT]; |
284 | }; |
285 | |
286 | struct dlm_nodes { |
287 | struct config_group ns_group; |
288 | }; |
289 | |
290 | struct dlm_node { |
291 | struct config_item item; |
292 | struct list_head list; /* space->members */ |
293 | int nodeid; |
294 | int weight; |
295 | int new; |
296 | int comm_seq; /* copy of cm->seq when nd->nodeid is set */ |
297 | }; |
298 | |
299 | static struct configfs_group_operations clusters_ops = { |
300 | .make_group = make_cluster, |
301 | .drop_item = drop_cluster, |
302 | }; |
303 | |
304 | static struct configfs_item_operations cluster_ops = { |
305 | .release = release_cluster, |
306 | }; |
307 | |
308 | static struct configfs_group_operations spaces_ops = { |
309 | .make_group = make_space, |
310 | .drop_item = drop_space, |
311 | }; |
312 | |
313 | static struct configfs_item_operations space_ops = { |
314 | .release = release_space, |
315 | }; |
316 | |
317 | static struct configfs_group_operations comms_ops = { |
318 | .make_item = make_comm, |
319 | .drop_item = drop_comm, |
320 | }; |
321 | |
322 | static struct configfs_item_operations comm_ops = { |
323 | .release = release_comm, |
324 | }; |
325 | |
326 | static struct configfs_group_operations nodes_ops = { |
327 | .make_item = make_node, |
328 | .drop_item = drop_node, |
329 | }; |
330 | |
331 | static struct configfs_item_operations node_ops = { |
332 | .release = release_node, |
333 | }; |
334 | |
335 | static const struct config_item_type clusters_type = { |
336 | .ct_group_ops = &clusters_ops, |
337 | .ct_owner = THIS_MODULE, |
338 | }; |
339 | |
340 | static const struct config_item_type cluster_type = { |
341 | .ct_item_ops = &cluster_ops, |
342 | .ct_attrs = cluster_attrs, |
343 | .ct_owner = THIS_MODULE, |
344 | }; |
345 | |
346 | static const struct config_item_type spaces_type = { |
347 | .ct_group_ops = &spaces_ops, |
348 | .ct_owner = THIS_MODULE, |
349 | }; |
350 | |
351 | static const struct config_item_type space_type = { |
352 | .ct_item_ops = &space_ops, |
353 | .ct_owner = THIS_MODULE, |
354 | }; |
355 | |
356 | static const struct config_item_type comms_type = { |
357 | .ct_group_ops = &comms_ops, |
358 | .ct_owner = THIS_MODULE, |
359 | }; |
360 | |
361 | static const struct config_item_type comm_type = { |
362 | .ct_item_ops = &comm_ops, |
363 | .ct_attrs = comm_attrs, |
364 | .ct_owner = THIS_MODULE, |
365 | }; |
366 | |
367 | static const struct config_item_type nodes_type = { |
368 | .ct_group_ops = &nodes_ops, |
369 | .ct_owner = THIS_MODULE, |
370 | }; |
371 | |
372 | static const struct config_item_type node_type = { |
373 | .ct_item_ops = &node_ops, |
374 | .ct_attrs = node_attrs, |
375 | .ct_owner = THIS_MODULE, |
376 | }; |
377 | |
378 | static struct dlm_space *config_item_to_space(struct config_item *i) |
379 | { |
380 | return i ? container_of(to_config_group(i), struct dlm_space, group) : |
381 | NULL; |
382 | } |
383 | |
384 | static struct dlm_comm *config_item_to_comm(struct config_item *i) |
385 | { |
386 | return i ? container_of(i, struct dlm_comm, item) : NULL; |
387 | } |
388 | |
389 | static struct dlm_node *config_item_to_node(struct config_item *i) |
390 | { |
391 | return i ? container_of(i, struct dlm_node, item) : NULL; |
392 | } |
393 | |
394 | static struct config_group *make_cluster(struct config_group *g, |
395 | const char *name) |
396 | { |
397 | struct dlm_cluster *cl = NULL; |
398 | struct dlm_spaces *sps = NULL; |
399 | struct dlm_comms *cms = NULL; |
400 | |
401 | cl = kzalloc(size: sizeof(struct dlm_cluster), GFP_NOFS); |
402 | sps = kzalloc(size: sizeof(struct dlm_spaces), GFP_NOFS); |
403 | cms = kzalloc(size: sizeof(struct dlm_comms), GFP_NOFS); |
404 | |
405 | if (!cl || !sps || !cms) |
406 | goto fail; |
407 | |
408 | cl->sps = sps; |
409 | cl->cms = cms; |
410 | |
411 | config_group_init_type_name(group: &cl->group, name, type: &cluster_type); |
412 | config_group_init_type_name(group: &sps->ss_group, name: "spaces" , type: &spaces_type); |
413 | config_group_init_type_name(group: &cms->cs_group, name: "comms" , type: &comms_type); |
414 | |
415 | configfs_add_default_group(new_group: &sps->ss_group, group: &cl->group); |
416 | configfs_add_default_group(new_group: &cms->cs_group, group: &cl->group); |
417 | |
418 | cl->cl_tcp_port = dlm_config.ci_tcp_port; |
419 | cl->cl_buffer_size = dlm_config.ci_buffer_size; |
420 | cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size; |
421 | cl->cl_recover_timer = dlm_config.ci_recover_timer; |
422 | cl->cl_toss_secs = dlm_config.ci_toss_secs; |
423 | cl->cl_scan_secs = dlm_config.ci_scan_secs; |
424 | cl->cl_log_debug = dlm_config.ci_log_debug; |
425 | cl->cl_log_info = dlm_config.ci_log_info; |
426 | cl->cl_protocol = dlm_config.ci_protocol; |
427 | cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count; |
428 | cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks; |
429 | memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name, |
430 | DLM_LOCKSPACE_LEN); |
431 | |
432 | space_list = &sps->ss_group; |
433 | comm_list = &cms->cs_group; |
434 | return &cl->group; |
435 | |
436 | fail: |
437 | kfree(objp: cl); |
438 | kfree(objp: sps); |
439 | kfree(objp: cms); |
440 | return ERR_PTR(error: -ENOMEM); |
441 | } |
442 | |
443 | static void drop_cluster(struct config_group *g, struct config_item *i) |
444 | { |
445 | struct dlm_cluster *cl = config_item_to_cluster(i); |
446 | |
447 | configfs_remove_default_groups(group: &cl->group); |
448 | |
449 | space_list = NULL; |
450 | comm_list = NULL; |
451 | |
452 | config_item_put(i); |
453 | } |
454 | |
455 | static void release_cluster(struct config_item *i) |
456 | { |
457 | struct dlm_cluster *cl = config_item_to_cluster(i); |
458 | |
459 | kfree(objp: cl->sps); |
460 | kfree(objp: cl->cms); |
461 | kfree(objp: cl); |
462 | } |
463 | |
464 | static struct config_group *make_space(struct config_group *g, const char *name) |
465 | { |
466 | struct dlm_space *sp = NULL; |
467 | struct dlm_nodes *nds = NULL; |
468 | |
469 | sp = kzalloc(size: sizeof(struct dlm_space), GFP_NOFS); |
470 | nds = kzalloc(size: sizeof(struct dlm_nodes), GFP_NOFS); |
471 | |
472 | if (!sp || !nds) |
473 | goto fail; |
474 | |
475 | config_group_init_type_name(group: &sp->group, name, type: &space_type); |
476 | |
477 | config_group_init_type_name(group: &nds->ns_group, name: "nodes" , type: &nodes_type); |
478 | configfs_add_default_group(new_group: &nds->ns_group, group: &sp->group); |
479 | |
480 | INIT_LIST_HEAD(list: &sp->members); |
481 | mutex_init(&sp->members_lock); |
482 | sp->members_count = 0; |
483 | sp->nds = nds; |
484 | return &sp->group; |
485 | |
486 | fail: |
487 | kfree(objp: sp); |
488 | kfree(objp: nds); |
489 | return ERR_PTR(error: -ENOMEM); |
490 | } |
491 | |
492 | static void drop_space(struct config_group *g, struct config_item *i) |
493 | { |
494 | struct dlm_space *sp = config_item_to_space(i); |
495 | |
496 | /* assert list_empty(&sp->members) */ |
497 | |
498 | configfs_remove_default_groups(group: &sp->group); |
499 | config_item_put(i); |
500 | } |
501 | |
502 | static void release_space(struct config_item *i) |
503 | { |
504 | struct dlm_space *sp = config_item_to_space(i); |
505 | kfree(objp: sp->nds); |
506 | kfree(objp: sp); |
507 | } |
508 | |
509 | static struct config_item *make_comm(struct config_group *g, const char *name) |
510 | { |
511 | struct dlm_comm *cm; |
512 | |
513 | cm = kzalloc(size: sizeof(struct dlm_comm), GFP_NOFS); |
514 | if (!cm) |
515 | return ERR_PTR(error: -ENOMEM); |
516 | |
517 | config_item_init_type_name(item: &cm->item, name, type: &comm_type); |
518 | |
519 | cm->seq = dlm_comm_count++; |
520 | if (!cm->seq) |
521 | cm->seq = dlm_comm_count++; |
522 | |
523 | cm->nodeid = -1; |
524 | cm->local = 0; |
525 | cm->addr_count = 0; |
526 | cm->mark = 0; |
527 | return &cm->item; |
528 | } |
529 | |
530 | static void drop_comm(struct config_group *g, struct config_item *i) |
531 | { |
532 | struct dlm_comm *cm = config_item_to_comm(i); |
533 | if (local_comm == cm) |
534 | local_comm = NULL; |
535 | dlm_midcomms_close(nodeid: cm->nodeid); |
536 | while (cm->addr_count--) |
537 | kfree(objp: cm->addr[cm->addr_count]); |
538 | config_item_put(i); |
539 | } |
540 | |
541 | static void release_comm(struct config_item *i) |
542 | { |
543 | struct dlm_comm *cm = config_item_to_comm(i); |
544 | kfree(objp: cm); |
545 | } |
546 | |
547 | static struct config_item *make_node(struct config_group *g, const char *name) |
548 | { |
549 | struct dlm_space *sp = config_item_to_space(i: g->cg_item.ci_parent); |
550 | struct dlm_node *nd; |
551 | |
552 | nd = kzalloc(size: sizeof(struct dlm_node), GFP_NOFS); |
553 | if (!nd) |
554 | return ERR_PTR(error: -ENOMEM); |
555 | |
556 | config_item_init_type_name(item: &nd->item, name, type: &node_type); |
557 | nd->nodeid = -1; |
558 | nd->weight = 1; /* default weight of 1 if none is set */ |
559 | nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */ |
560 | |
561 | mutex_lock(&sp->members_lock); |
562 | list_add(new: &nd->list, head: &sp->members); |
563 | sp->members_count++; |
564 | mutex_unlock(lock: &sp->members_lock); |
565 | |
566 | return &nd->item; |
567 | } |
568 | |
569 | static void drop_node(struct config_group *g, struct config_item *i) |
570 | { |
571 | struct dlm_space *sp = config_item_to_space(i: g->cg_item.ci_parent); |
572 | struct dlm_node *nd = config_item_to_node(i); |
573 | |
574 | mutex_lock(&sp->members_lock); |
575 | list_del(entry: &nd->list); |
576 | sp->members_count--; |
577 | mutex_unlock(lock: &sp->members_lock); |
578 | |
579 | config_item_put(i); |
580 | } |
581 | |
582 | static void release_node(struct config_item *i) |
583 | { |
584 | struct dlm_node *nd = config_item_to_node(i); |
585 | kfree(objp: nd); |
586 | } |
587 | |
588 | static struct dlm_clusters clusters_root = { |
589 | .subsys = { |
590 | .su_group = { |
591 | .cg_item = { |
592 | .ci_namebuf = "dlm" , |
593 | .ci_type = &clusters_type, |
594 | }, |
595 | }, |
596 | }, |
597 | }; |
598 | |
599 | int __init dlm_config_init(void) |
600 | { |
601 | config_group_init(group: &clusters_root.subsys.su_group); |
602 | mutex_init(&clusters_root.subsys.su_mutex); |
603 | return configfs_register_subsystem(subsys: &clusters_root.subsys); |
604 | } |
605 | |
606 | void dlm_config_exit(void) |
607 | { |
608 | configfs_unregister_subsystem(subsys: &clusters_root.subsys); |
609 | } |
610 | |
611 | /* |
612 | * Functions for user space to read/write attributes |
613 | */ |
614 | |
615 | static ssize_t comm_nodeid_show(struct config_item *item, char *buf) |
616 | { |
617 | return sprintf(buf, fmt: "%d\n" , config_item_to_comm(i: item)->nodeid); |
618 | } |
619 | |
620 | static ssize_t comm_nodeid_store(struct config_item *item, const char *buf, |
621 | size_t len) |
622 | { |
623 | int rc = kstrtoint(s: buf, base: 0, res: &config_item_to_comm(i: item)->nodeid); |
624 | |
625 | if (rc) |
626 | return rc; |
627 | return len; |
628 | } |
629 | |
630 | static ssize_t comm_local_show(struct config_item *item, char *buf) |
631 | { |
632 | return sprintf(buf, fmt: "%d\n" , config_item_to_comm(i: item)->local); |
633 | } |
634 | |
635 | static ssize_t comm_local_store(struct config_item *item, const char *buf, |
636 | size_t len) |
637 | { |
638 | struct dlm_comm *cm = config_item_to_comm(i: item); |
639 | int rc = kstrtoint(s: buf, base: 0, res: &cm->local); |
640 | |
641 | if (rc) |
642 | return rc; |
643 | if (cm->local && !local_comm) |
644 | local_comm = cm; |
645 | return len; |
646 | } |
647 | |
648 | static ssize_t comm_addr_store(struct config_item *item, const char *buf, |
649 | size_t len) |
650 | { |
651 | struct dlm_comm *cm = config_item_to_comm(i: item); |
652 | struct sockaddr_storage *addr; |
653 | int rv; |
654 | |
655 | if (len != sizeof(struct sockaddr_storage)) |
656 | return -EINVAL; |
657 | |
658 | if (cm->addr_count >= DLM_MAX_ADDR_COUNT) |
659 | return -ENOSPC; |
660 | |
661 | addr = kzalloc(size: sizeof(*addr), GFP_NOFS); |
662 | if (!addr) |
663 | return -ENOMEM; |
664 | |
665 | memcpy(addr, buf, len); |
666 | |
667 | rv = dlm_midcomms_addr(nodeid: cm->nodeid, addr, len); |
668 | if (rv) { |
669 | kfree(objp: addr); |
670 | return rv; |
671 | } |
672 | |
673 | cm->addr[cm->addr_count++] = addr; |
674 | return len; |
675 | } |
676 | |
677 | static ssize_t comm_addr_list_show(struct config_item *item, char *buf) |
678 | { |
679 | struct dlm_comm *cm = config_item_to_comm(i: item); |
680 | ssize_t s; |
681 | ssize_t allowance; |
682 | int i; |
683 | struct sockaddr_storage *addr; |
684 | struct sockaddr_in *addr_in; |
685 | struct sockaddr_in6 *addr_in6; |
686 | |
687 | /* Taken from ip6_addr_string() defined in lib/vsprintf.c */ |
688 | char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n" )]; |
689 | |
690 | |
691 | /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */ |
692 | allowance = 4096; |
693 | buf[0] = '\0'; |
694 | |
695 | for (i = 0; i < cm->addr_count; i++) { |
696 | addr = cm->addr[i]; |
697 | |
698 | switch(addr->ss_family) { |
699 | case AF_INET: |
700 | addr_in = (struct sockaddr_in *)addr; |
701 | s = sprintf(buf: buf0, fmt: "AF_INET %pI4\n" , &addr_in->sin_addr.s_addr); |
702 | break; |
703 | case AF_INET6: |
704 | addr_in6 = (struct sockaddr_in6 *)addr; |
705 | s = sprintf(buf: buf0, fmt: "AF_INET6 %pI6\n" , &addr_in6->sin6_addr); |
706 | break; |
707 | default: |
708 | s = sprintf(buf: buf0, fmt: "%s\n" , "<UNKNOWN>" ); |
709 | break; |
710 | } |
711 | allowance -= s; |
712 | if (allowance >= 0) |
713 | strcat(p: buf, q: buf0); |
714 | else { |
715 | allowance += s; |
716 | break; |
717 | } |
718 | } |
719 | return 4096 - allowance; |
720 | } |
721 | |
722 | static ssize_t comm_mark_show(struct config_item *item, char *buf) |
723 | { |
724 | return sprintf(buf, fmt: "%u\n" , config_item_to_comm(i: item)->mark); |
725 | } |
726 | |
727 | static ssize_t comm_mark_store(struct config_item *item, const char *buf, |
728 | size_t len) |
729 | { |
730 | struct dlm_comm *comm; |
731 | unsigned int mark; |
732 | int rc; |
733 | |
734 | rc = kstrtouint(s: buf, base: 0, res: &mark); |
735 | if (rc) |
736 | return rc; |
737 | |
738 | if (mark == 0) |
739 | mark = dlm_config.ci_mark; |
740 | |
741 | comm = config_item_to_comm(i: item); |
742 | rc = dlm_lowcomms_nodes_set_mark(nodeid: comm->nodeid, mark); |
743 | if (rc) |
744 | return rc; |
745 | |
746 | comm->mark = mark; |
747 | return len; |
748 | } |
749 | |
750 | CONFIGFS_ATTR(comm_, nodeid); |
751 | CONFIGFS_ATTR(comm_, local); |
752 | CONFIGFS_ATTR(comm_, mark); |
753 | CONFIGFS_ATTR_WO(comm_, addr); |
754 | CONFIGFS_ATTR_RO(comm_, addr_list); |
755 | |
756 | static struct configfs_attribute *comm_attrs[] = { |
757 | [COMM_ATTR_NODEID] = &comm_attr_nodeid, |
758 | [COMM_ATTR_LOCAL] = &comm_attr_local, |
759 | [COMM_ATTR_ADDR] = &comm_attr_addr, |
760 | [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list, |
761 | [COMM_ATTR_MARK] = &comm_attr_mark, |
762 | NULL, |
763 | }; |
764 | |
765 | static ssize_t node_nodeid_show(struct config_item *item, char *buf) |
766 | { |
767 | return sprintf(buf, fmt: "%d\n" , config_item_to_node(i: item)->nodeid); |
768 | } |
769 | |
770 | static ssize_t node_nodeid_store(struct config_item *item, const char *buf, |
771 | size_t len) |
772 | { |
773 | struct dlm_node *nd = config_item_to_node(i: item); |
774 | uint32_t seq = 0; |
775 | int rc = kstrtoint(s: buf, base: 0, res: &nd->nodeid); |
776 | |
777 | if (rc) |
778 | return rc; |
779 | dlm_comm_seq(nodeid: nd->nodeid, seq: &seq); |
780 | nd->comm_seq = seq; |
781 | return len; |
782 | } |
783 | |
784 | static ssize_t node_weight_show(struct config_item *item, char *buf) |
785 | { |
786 | return sprintf(buf, fmt: "%d\n" , config_item_to_node(i: item)->weight); |
787 | } |
788 | |
789 | static ssize_t node_weight_store(struct config_item *item, const char *buf, |
790 | size_t len) |
791 | { |
792 | int rc = kstrtoint(s: buf, base: 0, res: &config_item_to_node(i: item)->weight); |
793 | |
794 | if (rc) |
795 | return rc; |
796 | return len; |
797 | } |
798 | |
799 | CONFIGFS_ATTR(node_, nodeid); |
800 | CONFIGFS_ATTR(node_, weight); |
801 | |
802 | static struct configfs_attribute *node_attrs[] = { |
803 | [NODE_ATTR_NODEID] = &node_attr_nodeid, |
804 | [NODE_ATTR_WEIGHT] = &node_attr_weight, |
805 | NULL, |
806 | }; |
807 | |
808 | /* |
809 | * Functions for the dlm to get the info that's been configured |
810 | */ |
811 | |
812 | static struct dlm_space *get_space(char *name) |
813 | { |
814 | struct config_item *i; |
815 | |
816 | if (!space_list) |
817 | return NULL; |
818 | |
819 | mutex_lock(&space_list->cg_subsys->su_mutex); |
820 | i = config_group_find_item(space_list, name); |
821 | mutex_unlock(lock: &space_list->cg_subsys->su_mutex); |
822 | |
823 | return config_item_to_space(i); |
824 | } |
825 | |
826 | static void put_space(struct dlm_space *sp) |
827 | { |
828 | config_item_put(&sp->group.cg_item); |
829 | } |
830 | |
831 | static struct dlm_comm *get_comm(int nodeid) |
832 | { |
833 | struct config_item *i; |
834 | struct dlm_comm *cm = NULL; |
835 | int found = 0; |
836 | |
837 | if (!comm_list) |
838 | return NULL; |
839 | |
840 | mutex_lock(&clusters_root.subsys.su_mutex); |
841 | |
842 | list_for_each_entry(i, &comm_list->cg_children, ci_entry) { |
843 | cm = config_item_to_comm(i); |
844 | |
845 | if (cm->nodeid != nodeid) |
846 | continue; |
847 | found = 1; |
848 | config_item_get(i); |
849 | break; |
850 | } |
851 | mutex_unlock(lock: &clusters_root.subsys.su_mutex); |
852 | |
853 | if (!found) |
854 | cm = NULL; |
855 | return cm; |
856 | } |
857 | |
858 | static void put_comm(struct dlm_comm *cm) |
859 | { |
860 | config_item_put(&cm->item); |
861 | } |
862 | |
863 | /* caller must free mem */ |
864 | int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out, |
865 | int *count_out) |
866 | { |
867 | struct dlm_space *sp; |
868 | struct dlm_node *nd; |
869 | struct dlm_config_node *nodes, *node; |
870 | int rv, count; |
871 | |
872 | sp = get_space(name: lsname); |
873 | if (!sp) |
874 | return -EEXIST; |
875 | |
876 | mutex_lock(&sp->members_lock); |
877 | if (!sp->members_count) { |
878 | rv = -EINVAL; |
879 | printk(KERN_ERR "dlm: zero members_count\n" ); |
880 | goto out; |
881 | } |
882 | |
883 | count = sp->members_count; |
884 | |
885 | nodes = kcalloc(n: count, size: sizeof(struct dlm_config_node), GFP_NOFS); |
886 | if (!nodes) { |
887 | rv = -ENOMEM; |
888 | goto out; |
889 | } |
890 | |
891 | node = nodes; |
892 | list_for_each_entry(nd, &sp->members, list) { |
893 | node->nodeid = nd->nodeid; |
894 | node->weight = nd->weight; |
895 | node->new = nd->new; |
896 | node->comm_seq = nd->comm_seq; |
897 | node++; |
898 | |
899 | nd->new = 0; |
900 | } |
901 | |
902 | *count_out = count; |
903 | *nodes_out = nodes; |
904 | rv = 0; |
905 | out: |
906 | mutex_unlock(lock: &sp->members_lock); |
907 | put_space(sp); |
908 | return rv; |
909 | } |
910 | |
911 | int dlm_comm_seq(int nodeid, uint32_t *seq) |
912 | { |
913 | struct dlm_comm *cm = get_comm(nodeid); |
914 | if (!cm) |
915 | return -EEXIST; |
916 | *seq = cm->seq; |
917 | put_comm(cm); |
918 | return 0; |
919 | } |
920 | |
921 | int dlm_our_nodeid(void) |
922 | { |
923 | return local_comm ? local_comm->nodeid : 0; |
924 | } |
925 | |
926 | /* num 0 is first addr, num 1 is second addr */ |
927 | int dlm_our_addr(struct sockaddr_storage *addr, int num) |
928 | { |
929 | if (!local_comm) |
930 | return -1; |
931 | if (num + 1 > local_comm->addr_count) |
932 | return -1; |
933 | memcpy(addr, local_comm->addr[num], sizeof(*addr)); |
934 | return 0; |
935 | } |
936 | |
937 | /* Config file defaults */ |
938 | #define DEFAULT_TCP_PORT 21064 |
939 | #define DEFAULT_RSBTBL_SIZE 1024 |
940 | #define DEFAULT_RECOVER_TIMER 5 |
941 | #define DEFAULT_TOSS_SECS 10 |
942 | #define DEFAULT_SCAN_SECS 5 |
943 | #define DEFAULT_LOG_DEBUG 0 |
944 | #define DEFAULT_LOG_INFO 1 |
945 | #define DEFAULT_PROTOCOL DLM_PROTO_TCP |
946 | #define DEFAULT_MARK 0 |
947 | #define DEFAULT_NEW_RSB_COUNT 128 |
948 | #define DEFAULT_RECOVER_CALLBACKS 0 |
949 | #define DEFAULT_CLUSTER_NAME "" |
950 | |
951 | struct dlm_config_info dlm_config = { |
952 | .ci_tcp_port = DEFAULT_TCP_PORT, |
953 | .ci_buffer_size = DLM_MAX_SOCKET_BUFSIZE, |
954 | .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE, |
955 | .ci_recover_timer = DEFAULT_RECOVER_TIMER, |
956 | .ci_toss_secs = DEFAULT_TOSS_SECS, |
957 | .ci_scan_secs = DEFAULT_SCAN_SECS, |
958 | .ci_log_debug = DEFAULT_LOG_DEBUG, |
959 | .ci_log_info = DEFAULT_LOG_INFO, |
960 | .ci_protocol = DEFAULT_PROTOCOL, |
961 | .ci_mark = DEFAULT_MARK, |
962 | .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT, |
963 | .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS, |
964 | .ci_cluster_name = DEFAULT_CLUSTER_NAME |
965 | }; |
966 | |
967 | |