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0c83ed8e KH |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * Copyright (C) 2004, 2005 Oracle. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public | |
17 | * License along with this program; if not, write to the | |
18 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | * Boston, MA 021110-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/sysctl.h> | |
25 | #include <linux/configfs.h> | |
26 | ||
0c83ed8e KH |
27 | #include "tcp.h" |
28 | #include "nodemanager.h" | |
29 | #include "heartbeat.h" | |
30 | #include "masklog.h" | |
31 | #include "sys.h" | |
32 | #include "ver.h" | |
33 | ||
34 | /* for now we operate under the assertion that there can be only one | |
35 | * cluster active at a time. Changing this will require trickling | |
36 | * cluster references throughout where nodes are looked up */ | |
296b75ed | 37 | struct o2nm_cluster *o2nm_single_cluster = NULL; |
0c83ed8e KH |
38 | |
39 | #define OCFS2_MAX_HB_CTL_PATH 256 | |
40 | static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl"; | |
41 | ||
42 | static ctl_table ocfs2_nm_table[] = { | |
43 | { | |
44 | .ctl_name = 1, | |
45 | .procname = "hb_ctl_path", | |
46 | .data = ocfs2_hb_ctl_path, | |
47 | .maxlen = OCFS2_MAX_HB_CTL_PATH, | |
48 | .mode = 0644, | |
49 | .proc_handler = &proc_dostring, | |
50 | .strategy = &sysctl_string, | |
51 | }, | |
52 | { .ctl_name = 0 } | |
53 | }; | |
54 | ||
55 | static ctl_table ocfs2_mod_table[] = { | |
56 | { | |
0e03036c | 57 | .ctl_name = FS_OCFS2_NM, |
0c83ed8e KH |
58 | .procname = "nm", |
59 | .data = NULL, | |
60 | .maxlen = 0, | |
61 | .mode = 0555, | |
62 | .child = ocfs2_nm_table | |
63 | }, | |
64 | { .ctl_name = 0} | |
65 | }; | |
66 | ||
67 | static ctl_table ocfs2_kern_table[] = { | |
68 | { | |
0e03036c | 69 | .ctl_name = FS_OCFS2, |
0c83ed8e KH |
70 | .procname = "ocfs2", |
71 | .data = NULL, | |
72 | .maxlen = 0, | |
73 | .mode = 0555, | |
74 | .child = ocfs2_mod_table | |
75 | }, | |
76 | { .ctl_name = 0} | |
77 | }; | |
78 | ||
79 | static ctl_table ocfs2_root_table[] = { | |
80 | { | |
81 | .ctl_name = CTL_FS, | |
82 | .procname = "fs", | |
83 | .data = NULL, | |
84 | .maxlen = 0, | |
85 | .mode = 0555, | |
86 | .child = ocfs2_kern_table | |
87 | }, | |
88 | { .ctl_name = 0 } | |
89 | }; | |
90 | ||
91 | static struct ctl_table_header *ocfs2_table_header = NULL; | |
92 | ||
93 | const char *o2nm_get_hb_ctl_path(void) | |
94 | { | |
95 | return ocfs2_hb_ctl_path; | |
96 | } | |
97 | EXPORT_SYMBOL_GPL(o2nm_get_hb_ctl_path); | |
98 | ||
0c83ed8e KH |
99 | struct o2nm_node *o2nm_get_node_by_num(u8 node_num) |
100 | { | |
101 | struct o2nm_node *node = NULL; | |
102 | ||
103 | if (node_num >= O2NM_MAX_NODES || o2nm_single_cluster == NULL) | |
104 | goto out; | |
105 | ||
106 | read_lock(&o2nm_single_cluster->cl_nodes_lock); | |
107 | node = o2nm_single_cluster->cl_nodes[node_num]; | |
108 | if (node) | |
109 | config_item_get(&node->nd_item); | |
110 | read_unlock(&o2nm_single_cluster->cl_nodes_lock); | |
111 | out: | |
112 | return node; | |
113 | } | |
114 | EXPORT_SYMBOL_GPL(o2nm_get_node_by_num); | |
115 | ||
116 | int o2nm_configured_node_map(unsigned long *map, unsigned bytes) | |
117 | { | |
118 | struct o2nm_cluster *cluster = o2nm_single_cluster; | |
119 | ||
120 | BUG_ON(bytes < (sizeof(cluster->cl_nodes_bitmap))); | |
121 | ||
122 | if (cluster == NULL) | |
123 | return -EINVAL; | |
124 | ||
125 | read_lock(&cluster->cl_nodes_lock); | |
126 | memcpy(map, cluster->cl_nodes_bitmap, sizeof(cluster->cl_nodes_bitmap)); | |
127 | read_unlock(&cluster->cl_nodes_lock); | |
128 | ||
129 | return 0; | |
130 | } | |
131 | EXPORT_SYMBOL_GPL(o2nm_configured_node_map); | |
132 | ||
133 | static struct o2nm_node *o2nm_node_ip_tree_lookup(struct o2nm_cluster *cluster, | |
134 | __be32 ip_needle, | |
135 | struct rb_node ***ret_p, | |
136 | struct rb_node **ret_parent) | |
137 | { | |
138 | struct rb_node **p = &cluster->cl_node_ip_tree.rb_node; | |
139 | struct rb_node *parent = NULL; | |
140 | struct o2nm_node *node, *ret = NULL; | |
141 | ||
142 | while (*p) { | |
79cd22d3 AM |
143 | int cmp; |
144 | ||
0c83ed8e KH |
145 | parent = *p; |
146 | node = rb_entry(parent, struct o2nm_node, nd_ip_node); | |
147 | ||
79cd22d3 AM |
148 | cmp = memcmp(&ip_needle, &node->nd_ipv4_address, |
149 | sizeof(ip_needle)); | |
150 | if (cmp < 0) | |
0c83ed8e | 151 | p = &(*p)->rb_left; |
79cd22d3 | 152 | else if (cmp > 0) |
0c83ed8e KH |
153 | p = &(*p)->rb_right; |
154 | else { | |
155 | ret = node; | |
156 | break; | |
157 | } | |
158 | } | |
159 | ||
160 | if (ret_p != NULL) | |
161 | *ret_p = p; | |
162 | if (ret_parent != NULL) | |
163 | *ret_parent = parent; | |
164 | ||
165 | return ret; | |
166 | } | |
167 | ||
168 | struct o2nm_node *o2nm_get_node_by_ip(__be32 addr) | |
169 | { | |
170 | struct o2nm_node *node = NULL; | |
171 | struct o2nm_cluster *cluster = o2nm_single_cluster; | |
172 | ||
173 | if (cluster == NULL) | |
174 | goto out; | |
175 | ||
176 | read_lock(&cluster->cl_nodes_lock); | |
177 | node = o2nm_node_ip_tree_lookup(cluster, addr, NULL, NULL); | |
178 | if (node) | |
179 | config_item_get(&node->nd_item); | |
180 | read_unlock(&cluster->cl_nodes_lock); | |
181 | ||
182 | out: | |
183 | return node; | |
184 | } | |
185 | EXPORT_SYMBOL_GPL(o2nm_get_node_by_ip); | |
186 | ||
187 | void o2nm_node_put(struct o2nm_node *node) | |
188 | { | |
189 | config_item_put(&node->nd_item); | |
190 | } | |
191 | EXPORT_SYMBOL_GPL(o2nm_node_put); | |
192 | ||
193 | void o2nm_node_get(struct o2nm_node *node) | |
194 | { | |
195 | config_item_get(&node->nd_item); | |
196 | } | |
197 | EXPORT_SYMBOL_GPL(o2nm_node_get); | |
198 | ||
199 | u8 o2nm_this_node(void) | |
200 | { | |
201 | u8 node_num = O2NM_MAX_NODES; | |
202 | ||
203 | if (o2nm_single_cluster && o2nm_single_cluster->cl_has_local) | |
204 | node_num = o2nm_single_cluster->cl_local_node; | |
205 | ||
206 | return node_num; | |
207 | } | |
208 | EXPORT_SYMBOL_GPL(o2nm_this_node); | |
209 | ||
210 | /* node configfs bits */ | |
211 | ||
212 | static struct o2nm_cluster *to_o2nm_cluster(struct config_item *item) | |
213 | { | |
214 | return item ? | |
215 | container_of(to_config_group(item), struct o2nm_cluster, | |
216 | cl_group) | |
217 | : NULL; | |
218 | } | |
219 | ||
220 | static struct o2nm_node *to_o2nm_node(struct config_item *item) | |
221 | { | |
222 | return item ? container_of(item, struct o2nm_node, nd_item) : NULL; | |
223 | } | |
224 | ||
225 | static void o2nm_node_release(struct config_item *item) | |
226 | { | |
227 | struct o2nm_node *node = to_o2nm_node(item); | |
228 | kfree(node); | |
229 | } | |
230 | ||
231 | static ssize_t o2nm_node_num_read(struct o2nm_node *node, char *page) | |
232 | { | |
233 | return sprintf(page, "%d\n", node->nd_num); | |
234 | } | |
235 | ||
236 | static struct o2nm_cluster *to_o2nm_cluster_from_node(struct o2nm_node *node) | |
237 | { | |
238 | /* through the first node_set .parent | |
239 | * mycluster/nodes/mynode == o2nm_cluster->o2nm_node_group->o2nm_node */ | |
240 | return to_o2nm_cluster(node->nd_item.ci_parent->ci_parent); | |
241 | } | |
242 | ||
243 | enum { | |
244 | O2NM_NODE_ATTR_NUM = 0, | |
245 | O2NM_NODE_ATTR_PORT, | |
246 | O2NM_NODE_ATTR_ADDRESS, | |
247 | O2NM_NODE_ATTR_LOCAL, | |
248 | }; | |
249 | ||
250 | static ssize_t o2nm_node_num_write(struct o2nm_node *node, const char *page, | |
251 | size_t count) | |
252 | { | |
253 | struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node); | |
254 | unsigned long tmp; | |
255 | char *p = (char *)page; | |
256 | ||
257 | tmp = simple_strtoul(p, &p, 0); | |
258 | if (!p || (*p && (*p != '\n'))) | |
259 | return -EINVAL; | |
260 | ||
261 | if (tmp >= O2NM_MAX_NODES) | |
262 | return -ERANGE; | |
263 | ||
264 | /* once we're in the cl_nodes tree networking can look us up by | |
265 | * node number and try to use our address and port attributes | |
266 | * to connect to this node.. make sure that they've been set | |
267 | * before writing the node attribute? */ | |
268 | if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) || | |
269 | !test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes)) | |
270 | return -EINVAL; /* XXX */ | |
271 | ||
272 | write_lock(&cluster->cl_nodes_lock); | |
273 | if (cluster->cl_nodes[tmp]) | |
274 | p = NULL; | |
275 | else { | |
276 | cluster->cl_nodes[tmp] = node; | |
277 | node->nd_num = tmp; | |
278 | set_bit(tmp, cluster->cl_nodes_bitmap); | |
279 | } | |
280 | write_unlock(&cluster->cl_nodes_lock); | |
281 | if (p == NULL) | |
282 | return -EEXIST; | |
283 | ||
284 | return count; | |
285 | } | |
286 | static ssize_t o2nm_node_ipv4_port_read(struct o2nm_node *node, char *page) | |
287 | { | |
288 | return sprintf(page, "%u\n", ntohs(node->nd_ipv4_port)); | |
289 | } | |
290 | ||
291 | static ssize_t o2nm_node_ipv4_port_write(struct o2nm_node *node, | |
292 | const char *page, size_t count) | |
293 | { | |
294 | unsigned long tmp; | |
295 | char *p = (char *)page; | |
296 | ||
297 | tmp = simple_strtoul(p, &p, 0); | |
298 | if (!p || (*p && (*p != '\n'))) | |
299 | return -EINVAL; | |
300 | ||
301 | if (tmp == 0) | |
302 | return -EINVAL; | |
303 | if (tmp >= (u16)-1) | |
304 | return -ERANGE; | |
305 | ||
306 | node->nd_ipv4_port = htons(tmp); | |
307 | ||
308 | return count; | |
309 | } | |
310 | ||
311 | static ssize_t o2nm_node_ipv4_address_read(struct o2nm_node *node, char *page) | |
312 | { | |
313 | return sprintf(page, "%u.%u.%u.%u\n", NIPQUAD(node->nd_ipv4_address)); | |
314 | } | |
315 | ||
316 | static ssize_t o2nm_node_ipv4_address_write(struct o2nm_node *node, | |
317 | const char *page, | |
318 | size_t count) | |
319 | { | |
320 | struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node); | |
321 | int ret, i; | |
322 | struct rb_node **p, *parent; | |
323 | unsigned int octets[4]; | |
324 | __be32 ipv4_addr = 0; | |
325 | ||
326 | ret = sscanf(page, "%3u.%3u.%3u.%3u", &octets[3], &octets[2], | |
327 | &octets[1], &octets[0]); | |
328 | if (ret != 4) | |
329 | return -EINVAL; | |
330 | ||
331 | for (i = 0; i < ARRAY_SIZE(octets); i++) { | |
332 | if (octets[i] > 255) | |
333 | return -ERANGE; | |
334 | be32_add_cpu(&ipv4_addr, octets[i] << (i * 8)); | |
335 | } | |
336 | ||
337 | ret = 0; | |
338 | write_lock(&cluster->cl_nodes_lock); | |
339 | if (o2nm_node_ip_tree_lookup(cluster, ipv4_addr, &p, &parent)) | |
340 | ret = -EEXIST; | |
341 | else { | |
342 | rb_link_node(&node->nd_ip_node, parent, p); | |
343 | rb_insert_color(&node->nd_ip_node, &cluster->cl_node_ip_tree); | |
344 | } | |
345 | write_unlock(&cluster->cl_nodes_lock); | |
346 | if (ret) | |
347 | return ret; | |
348 | ||
349 | memcpy(&node->nd_ipv4_address, &ipv4_addr, sizeof(ipv4_addr)); | |
350 | ||
351 | return count; | |
352 | } | |
353 | ||
354 | static ssize_t o2nm_node_local_read(struct o2nm_node *node, char *page) | |
355 | { | |
356 | return sprintf(page, "%d\n", node->nd_local); | |
357 | } | |
358 | ||
359 | static ssize_t o2nm_node_local_write(struct o2nm_node *node, const char *page, | |
360 | size_t count) | |
361 | { | |
362 | struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node); | |
363 | unsigned long tmp; | |
364 | char *p = (char *)page; | |
365 | ssize_t ret; | |
366 | ||
367 | tmp = simple_strtoul(p, &p, 0); | |
368 | if (!p || (*p && (*p != '\n'))) | |
369 | return -EINVAL; | |
370 | ||
371 | tmp = !!tmp; /* boolean of whether this node wants to be local */ | |
372 | ||
373 | /* setting local turns on networking rx for now so we require having | |
374 | * set everything else first */ | |
375 | if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) || | |
376 | !test_bit(O2NM_NODE_ATTR_NUM, &node->nd_set_attributes) || | |
377 | !test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes)) | |
378 | return -EINVAL; /* XXX */ | |
379 | ||
380 | /* the only failure case is trying to set a new local node | |
381 | * when a different one is already set */ | |
382 | if (tmp && tmp == cluster->cl_has_local && | |
383 | cluster->cl_local_node != node->nd_num) | |
384 | return -EBUSY; | |
385 | ||
386 | /* bring up the rx thread if we're setting the new local node. */ | |
387 | if (tmp && !cluster->cl_has_local) { | |
388 | ret = o2net_start_listening(node); | |
389 | if (ret) | |
390 | return ret; | |
391 | } | |
392 | ||
393 | if (!tmp && cluster->cl_has_local && | |
394 | cluster->cl_local_node == node->nd_num) { | |
395 | o2net_stop_listening(node); | |
396 | cluster->cl_local_node = O2NM_INVALID_NODE_NUM; | |
397 | } | |
398 | ||
399 | node->nd_local = tmp; | |
400 | if (node->nd_local) { | |
401 | cluster->cl_has_local = tmp; | |
402 | cluster->cl_local_node = node->nd_num; | |
403 | } | |
404 | ||
405 | return count; | |
406 | } | |
407 | ||
408 | struct o2nm_node_attribute { | |
409 | struct configfs_attribute attr; | |
410 | ssize_t (*show)(struct o2nm_node *, char *); | |
411 | ssize_t (*store)(struct o2nm_node *, const char *, size_t); | |
412 | }; | |
413 | ||
414 | static struct o2nm_node_attribute o2nm_node_attr_num = { | |
415 | .attr = { .ca_owner = THIS_MODULE, | |
416 | .ca_name = "num", | |
417 | .ca_mode = S_IRUGO | S_IWUSR }, | |
418 | .show = o2nm_node_num_read, | |
419 | .store = o2nm_node_num_write, | |
420 | }; | |
421 | ||
422 | static struct o2nm_node_attribute o2nm_node_attr_ipv4_port = { | |
423 | .attr = { .ca_owner = THIS_MODULE, | |
424 | .ca_name = "ipv4_port", | |
425 | .ca_mode = S_IRUGO | S_IWUSR }, | |
426 | .show = o2nm_node_ipv4_port_read, | |
427 | .store = o2nm_node_ipv4_port_write, | |
428 | }; | |
429 | ||
430 | static struct o2nm_node_attribute o2nm_node_attr_ipv4_address = { | |
431 | .attr = { .ca_owner = THIS_MODULE, | |
432 | .ca_name = "ipv4_address", | |
433 | .ca_mode = S_IRUGO | S_IWUSR }, | |
434 | .show = o2nm_node_ipv4_address_read, | |
435 | .store = o2nm_node_ipv4_address_write, | |
436 | }; | |
437 | ||
438 | static struct o2nm_node_attribute o2nm_node_attr_local = { | |
439 | .attr = { .ca_owner = THIS_MODULE, | |
440 | .ca_name = "local", | |
441 | .ca_mode = S_IRUGO | S_IWUSR }, | |
442 | .show = o2nm_node_local_read, | |
443 | .store = o2nm_node_local_write, | |
444 | }; | |
445 | ||
446 | static struct configfs_attribute *o2nm_node_attrs[] = { | |
447 | [O2NM_NODE_ATTR_NUM] = &o2nm_node_attr_num.attr, | |
448 | [O2NM_NODE_ATTR_PORT] = &o2nm_node_attr_ipv4_port.attr, | |
449 | [O2NM_NODE_ATTR_ADDRESS] = &o2nm_node_attr_ipv4_address.attr, | |
450 | [O2NM_NODE_ATTR_LOCAL] = &o2nm_node_attr_local.attr, | |
451 | NULL, | |
452 | }; | |
453 | ||
454 | static int o2nm_attr_index(struct configfs_attribute *attr) | |
455 | { | |
456 | int i; | |
457 | for (i = 0; i < ARRAY_SIZE(o2nm_node_attrs); i++) { | |
458 | if (attr == o2nm_node_attrs[i]) | |
459 | return i; | |
460 | } | |
461 | BUG(); | |
462 | return 0; | |
463 | } | |
464 | ||
465 | static ssize_t o2nm_node_show(struct config_item *item, | |
466 | struct configfs_attribute *attr, | |
467 | char *page) | |
468 | { | |
469 | struct o2nm_node *node = to_o2nm_node(item); | |
470 | struct o2nm_node_attribute *o2nm_node_attr = | |
471 | container_of(attr, struct o2nm_node_attribute, attr); | |
472 | ssize_t ret = 0; | |
473 | ||
474 | if (o2nm_node_attr->show) | |
475 | ret = o2nm_node_attr->show(node, page); | |
476 | return ret; | |
477 | } | |
478 | ||
479 | static ssize_t o2nm_node_store(struct config_item *item, | |
480 | struct configfs_attribute *attr, | |
481 | const char *page, size_t count) | |
482 | { | |
483 | struct o2nm_node *node = to_o2nm_node(item); | |
484 | struct o2nm_node_attribute *o2nm_node_attr = | |
485 | container_of(attr, struct o2nm_node_attribute, attr); | |
486 | ssize_t ret; | |
487 | int attr_index = o2nm_attr_index(attr); | |
488 | ||
489 | if (o2nm_node_attr->store == NULL) { | |
490 | ret = -EINVAL; | |
491 | goto out; | |
492 | } | |
493 | ||
494 | if (test_bit(attr_index, &node->nd_set_attributes)) | |
495 | return -EBUSY; | |
496 | ||
497 | ret = o2nm_node_attr->store(node, page, count); | |
498 | if (ret < count) | |
499 | goto out; | |
500 | ||
501 | set_bit(attr_index, &node->nd_set_attributes); | |
502 | out: | |
503 | return ret; | |
504 | } | |
505 | ||
506 | static struct configfs_item_operations o2nm_node_item_ops = { | |
507 | .release = o2nm_node_release, | |
508 | .show_attribute = o2nm_node_show, | |
509 | .store_attribute = o2nm_node_store, | |
510 | }; | |
511 | ||
512 | static struct config_item_type o2nm_node_type = { | |
513 | .ct_item_ops = &o2nm_node_item_ops, | |
514 | .ct_attrs = o2nm_node_attrs, | |
515 | .ct_owner = THIS_MODULE, | |
516 | }; | |
517 | ||
518 | /* node set */ | |
519 | ||
520 | struct o2nm_node_group { | |
521 | struct config_group ns_group; | |
522 | /* some stuff? */ | |
523 | }; | |
524 | ||
525 | #if 0 | |
526 | static struct o2nm_node_group *to_o2nm_node_group(struct config_group *group) | |
527 | { | |
528 | return group ? | |
529 | container_of(group, struct o2nm_node_group, ns_group) | |
530 | : NULL; | |
531 | } | |
532 | #endif | |
533 | ||
b5dd8030 JM |
534 | struct o2nm_cluster_attribute { |
535 | struct configfs_attribute attr; | |
536 | ssize_t (*show)(struct o2nm_cluster *, char *); | |
537 | ssize_t (*store)(struct o2nm_cluster *, const char *, size_t); | |
538 | }; | |
539 | ||
540 | static ssize_t o2nm_cluster_attr_write(const char *page, ssize_t count, | |
541 | unsigned int *val) | |
542 | { | |
543 | unsigned long tmp; | |
544 | char *p = (char *)page; | |
545 | ||
546 | tmp = simple_strtoul(p, &p, 0); | |
547 | if (!p || (*p && (*p != '\n'))) | |
548 | return -EINVAL; | |
549 | ||
550 | if (tmp == 0) | |
551 | return -EINVAL; | |
552 | if (tmp >= (u32)-1) | |
553 | return -ERANGE; | |
554 | ||
555 | *val = tmp; | |
556 | ||
557 | return count; | |
558 | } | |
559 | ||
560 | static ssize_t o2nm_cluster_attr_idle_timeout_ms_read( | |
561 | struct o2nm_cluster *cluster, char *page) | |
562 | { | |
563 | return sprintf(page, "%u\n", cluster->cl_idle_timeout_ms); | |
564 | } | |
565 | ||
566 | static ssize_t o2nm_cluster_attr_idle_timeout_ms_write( | |
567 | struct o2nm_cluster *cluster, const char *page, size_t count) | |
568 | { | |
569 | ssize_t ret; | |
570 | unsigned int val; | |
571 | ||
572 | ret = o2nm_cluster_attr_write(page, count, &val); | |
573 | ||
574 | if (ret > 0) { | |
828ae6af AB |
575 | if (cluster->cl_idle_timeout_ms != val |
576 | && o2net_num_connected_peers()) { | |
577 | mlog(ML_NOTICE, | |
578 | "o2net: cannot change idle timeout after " | |
579 | "the first peer has agreed to it." | |
580 | " %d connected peers\n", | |
581 | o2net_num_connected_peers()); | |
582 | ret = -EINVAL; | |
583 | } else if (val <= cluster->cl_keepalive_delay_ms) { | |
b5dd8030 JM |
584 | mlog(ML_NOTICE, "o2net: idle timeout must be larger " |
585 | "than keepalive delay\n"); | |
828ae6af AB |
586 | ret = -EINVAL; |
587 | } else { | |
588 | cluster->cl_idle_timeout_ms = val; | |
b5dd8030 | 589 | } |
b5dd8030 JM |
590 | } |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
595 | static ssize_t o2nm_cluster_attr_keepalive_delay_ms_read( | |
596 | struct o2nm_cluster *cluster, char *page) | |
597 | { | |
598 | return sprintf(page, "%u\n", cluster->cl_keepalive_delay_ms); | |
599 | } | |
600 | ||
601 | static ssize_t o2nm_cluster_attr_keepalive_delay_ms_write( | |
602 | struct o2nm_cluster *cluster, const char *page, size_t count) | |
603 | { | |
604 | ssize_t ret; | |
605 | unsigned int val; | |
606 | ||
607 | ret = o2nm_cluster_attr_write(page, count, &val); | |
608 | ||
609 | if (ret > 0) { | |
828ae6af AB |
610 | if (cluster->cl_keepalive_delay_ms != val |
611 | && o2net_num_connected_peers()) { | |
612 | mlog(ML_NOTICE, | |
613 | "o2net: cannot change keepalive delay after" | |
614 | " the first peer has agreed to it." | |
615 | " %d connected peers\n", | |
616 | o2net_num_connected_peers()); | |
617 | ret = -EINVAL; | |
618 | } else if (val >= cluster->cl_idle_timeout_ms) { | |
b5dd8030 JM |
619 | mlog(ML_NOTICE, "o2net: keepalive delay must be " |
620 | "smaller than idle timeout\n"); | |
828ae6af AB |
621 | ret = -EINVAL; |
622 | } else { | |
623 | cluster->cl_keepalive_delay_ms = val; | |
b5dd8030 | 624 | } |
b5dd8030 JM |
625 | } |
626 | ||
627 | return ret; | |
628 | } | |
629 | ||
630 | static ssize_t o2nm_cluster_attr_reconnect_delay_ms_read( | |
631 | struct o2nm_cluster *cluster, char *page) | |
632 | { | |
633 | return sprintf(page, "%u\n", cluster->cl_reconnect_delay_ms); | |
634 | } | |
635 | ||
636 | static ssize_t o2nm_cluster_attr_reconnect_delay_ms_write( | |
637 | struct o2nm_cluster *cluster, const char *page, size_t count) | |
638 | { | |
639 | return o2nm_cluster_attr_write(page, count, | |
640 | &cluster->cl_reconnect_delay_ms); | |
641 | } | |
642 | static struct o2nm_cluster_attribute o2nm_cluster_attr_idle_timeout_ms = { | |
643 | .attr = { .ca_owner = THIS_MODULE, | |
644 | .ca_name = "idle_timeout_ms", | |
645 | .ca_mode = S_IRUGO | S_IWUSR }, | |
646 | .show = o2nm_cluster_attr_idle_timeout_ms_read, | |
647 | .store = o2nm_cluster_attr_idle_timeout_ms_write, | |
648 | }; | |
649 | ||
650 | static struct o2nm_cluster_attribute o2nm_cluster_attr_keepalive_delay_ms = { | |
651 | .attr = { .ca_owner = THIS_MODULE, | |
652 | .ca_name = "keepalive_delay_ms", | |
653 | .ca_mode = S_IRUGO | S_IWUSR }, | |
654 | .show = o2nm_cluster_attr_keepalive_delay_ms_read, | |
655 | .store = o2nm_cluster_attr_keepalive_delay_ms_write, | |
656 | }; | |
657 | ||
658 | static struct o2nm_cluster_attribute o2nm_cluster_attr_reconnect_delay_ms = { | |
659 | .attr = { .ca_owner = THIS_MODULE, | |
660 | .ca_name = "reconnect_delay_ms", | |
661 | .ca_mode = S_IRUGO | S_IWUSR }, | |
662 | .show = o2nm_cluster_attr_reconnect_delay_ms_read, | |
663 | .store = o2nm_cluster_attr_reconnect_delay_ms_write, | |
664 | }; | |
665 | ||
666 | static struct configfs_attribute *o2nm_cluster_attrs[] = { | |
667 | &o2nm_cluster_attr_idle_timeout_ms.attr, | |
668 | &o2nm_cluster_attr_keepalive_delay_ms.attr, | |
669 | &o2nm_cluster_attr_reconnect_delay_ms.attr, | |
670 | NULL, | |
671 | }; | |
672 | static ssize_t o2nm_cluster_show(struct config_item *item, | |
673 | struct configfs_attribute *attr, | |
674 | char *page) | |
675 | { | |
676 | struct o2nm_cluster *cluster = to_o2nm_cluster(item); | |
677 | struct o2nm_cluster_attribute *o2nm_cluster_attr = | |
678 | container_of(attr, struct o2nm_cluster_attribute, attr); | |
679 | ssize_t ret = 0; | |
680 | ||
681 | if (o2nm_cluster_attr->show) | |
682 | ret = o2nm_cluster_attr->show(cluster, page); | |
683 | return ret; | |
684 | } | |
685 | ||
686 | static ssize_t o2nm_cluster_store(struct config_item *item, | |
687 | struct configfs_attribute *attr, | |
688 | const char *page, size_t count) | |
689 | { | |
690 | struct o2nm_cluster *cluster = to_o2nm_cluster(item); | |
691 | struct o2nm_cluster_attribute *o2nm_cluster_attr = | |
692 | container_of(attr, struct o2nm_cluster_attribute, attr); | |
693 | ssize_t ret; | |
694 | ||
695 | if (o2nm_cluster_attr->store == NULL) { | |
696 | ret = -EINVAL; | |
697 | goto out; | |
698 | } | |
699 | ||
700 | ret = o2nm_cluster_attr->store(cluster, page, count); | |
701 | if (ret < count) | |
702 | goto out; | |
703 | out: | |
704 | return ret; | |
705 | } | |
706 | ||
0c83ed8e KH |
707 | static struct config_item *o2nm_node_group_make_item(struct config_group *group, |
708 | const char *name) | |
709 | { | |
710 | struct o2nm_node *node = NULL; | |
711 | struct config_item *ret = NULL; | |
712 | ||
713 | if (strlen(name) > O2NM_MAX_NAME_LEN) | |
714 | goto out; /* ENAMETOOLONG */ | |
715 | ||
cd861280 | 716 | node = kzalloc(sizeof(struct o2nm_node), GFP_KERNEL); |
0c83ed8e KH |
717 | if (node == NULL) |
718 | goto out; /* ENOMEM */ | |
719 | ||
720 | strcpy(node->nd_name, name); /* use item.ci_namebuf instead? */ | |
721 | config_item_init_type_name(&node->nd_item, name, &o2nm_node_type); | |
722 | spin_lock_init(&node->nd_lock); | |
723 | ||
724 | ret = &node->nd_item; | |
725 | ||
726 | out: | |
727 | if (ret == NULL) | |
728 | kfree(node); | |
729 | ||
730 | return ret; | |
731 | } | |
732 | ||
733 | static void o2nm_node_group_drop_item(struct config_group *group, | |
734 | struct config_item *item) | |
735 | { | |
736 | struct o2nm_node *node = to_o2nm_node(item); | |
737 | struct o2nm_cluster *cluster = to_o2nm_cluster(group->cg_item.ci_parent); | |
738 | ||
739 | o2net_disconnect_node(node); | |
740 | ||
741 | if (cluster->cl_has_local && | |
742 | (cluster->cl_local_node == node->nd_num)) { | |
743 | cluster->cl_has_local = 0; | |
744 | cluster->cl_local_node = O2NM_INVALID_NODE_NUM; | |
745 | o2net_stop_listening(node); | |
746 | } | |
747 | ||
748 | /* XXX call into net to stop this node from trading messages */ | |
749 | ||
750 | write_lock(&cluster->cl_nodes_lock); | |
751 | ||
752 | /* XXX sloppy */ | |
753 | if (node->nd_ipv4_address) | |
754 | rb_erase(&node->nd_ip_node, &cluster->cl_node_ip_tree); | |
755 | ||
756 | /* nd_num might be 0 if the node number hasn't been set.. */ | |
757 | if (cluster->cl_nodes[node->nd_num] == node) { | |
758 | cluster->cl_nodes[node->nd_num] = NULL; | |
759 | clear_bit(node->nd_num, cluster->cl_nodes_bitmap); | |
760 | } | |
761 | write_unlock(&cluster->cl_nodes_lock); | |
762 | ||
763 | config_item_put(item); | |
764 | } | |
765 | ||
766 | static struct configfs_group_operations o2nm_node_group_group_ops = { | |
767 | .make_item = o2nm_node_group_make_item, | |
768 | .drop_item = o2nm_node_group_drop_item, | |
769 | }; | |
770 | ||
771 | static struct config_item_type o2nm_node_group_type = { | |
772 | .ct_group_ops = &o2nm_node_group_group_ops, | |
773 | .ct_owner = THIS_MODULE, | |
774 | }; | |
775 | ||
776 | /* cluster */ | |
777 | ||
778 | static void o2nm_cluster_release(struct config_item *item) | |
779 | { | |
780 | struct o2nm_cluster *cluster = to_o2nm_cluster(item); | |
781 | ||
782 | kfree(cluster->cl_group.default_groups); | |
783 | kfree(cluster); | |
784 | } | |
785 | ||
786 | static struct configfs_item_operations o2nm_cluster_item_ops = { | |
787 | .release = o2nm_cluster_release, | |
b5dd8030 JM |
788 | .show_attribute = o2nm_cluster_show, |
789 | .store_attribute = o2nm_cluster_store, | |
0c83ed8e KH |
790 | }; |
791 | ||
792 | static struct config_item_type o2nm_cluster_type = { | |
793 | .ct_item_ops = &o2nm_cluster_item_ops, | |
b5dd8030 | 794 | .ct_attrs = o2nm_cluster_attrs, |
0c83ed8e KH |
795 | .ct_owner = THIS_MODULE, |
796 | }; | |
797 | ||
798 | /* cluster set */ | |
799 | ||
800 | struct o2nm_cluster_group { | |
801 | struct configfs_subsystem cs_subsys; | |
802 | /* some stuff? */ | |
803 | }; | |
804 | ||
805 | #if 0 | |
806 | static struct o2nm_cluster_group *to_o2nm_cluster_group(struct config_group *group) | |
807 | { | |
808 | return group ? | |
809 | container_of(to_configfs_subsystem(group), struct o2nm_cluster_group, cs_subsys) | |
810 | : NULL; | |
811 | } | |
812 | #endif | |
813 | ||
814 | static struct config_group *o2nm_cluster_group_make_group(struct config_group *group, | |
815 | const char *name) | |
816 | { | |
817 | struct o2nm_cluster *cluster = NULL; | |
818 | struct o2nm_node_group *ns = NULL; | |
819 | struct config_group *o2hb_group = NULL, *ret = NULL; | |
820 | void *defs = NULL; | |
821 | ||
1b1dcc1b | 822 | /* this runs under the parent dir's i_mutex; there can be only |
0c83ed8e KH |
823 | * one caller in here at a time */ |
824 | if (o2nm_single_cluster) | |
825 | goto out; /* ENOSPC */ | |
826 | ||
cd861280 RD |
827 | cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL); |
828 | ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL); | |
0c83ed8e KH |
829 | defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); |
830 | o2hb_group = o2hb_alloc_hb_set(); | |
831 | if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL) | |
832 | goto out; | |
833 | ||
834 | config_group_init_type_name(&cluster->cl_group, name, | |
835 | &o2nm_cluster_type); | |
836 | config_group_init_type_name(&ns->ns_group, "node", | |
837 | &o2nm_node_group_type); | |
838 | ||
839 | cluster->cl_group.default_groups = defs; | |
840 | cluster->cl_group.default_groups[0] = &ns->ns_group; | |
841 | cluster->cl_group.default_groups[1] = o2hb_group; | |
842 | cluster->cl_group.default_groups[2] = NULL; | |
843 | rwlock_init(&cluster->cl_nodes_lock); | |
844 | cluster->cl_node_ip_tree = RB_ROOT; | |
b5dd8030 JM |
845 | cluster->cl_reconnect_delay_ms = O2NET_RECONNECT_DELAY_MS_DEFAULT; |
846 | cluster->cl_idle_timeout_ms = O2NET_IDLE_TIMEOUT_MS_DEFAULT; | |
847 | cluster->cl_keepalive_delay_ms = O2NET_KEEPALIVE_DELAY_MS_DEFAULT; | |
0c83ed8e KH |
848 | |
849 | ret = &cluster->cl_group; | |
850 | o2nm_single_cluster = cluster; | |
851 | ||
852 | out: | |
853 | if (ret == NULL) { | |
854 | kfree(cluster); | |
855 | kfree(ns); | |
856 | o2hb_free_hb_set(o2hb_group); | |
857 | kfree(defs); | |
858 | } | |
859 | ||
860 | return ret; | |
861 | } | |
862 | ||
863 | static void o2nm_cluster_group_drop_item(struct config_group *group, struct config_item *item) | |
864 | { | |
865 | struct o2nm_cluster *cluster = to_o2nm_cluster(item); | |
866 | int i; | |
867 | struct config_item *killme; | |
868 | ||
869 | BUG_ON(o2nm_single_cluster != cluster); | |
870 | o2nm_single_cluster = NULL; | |
871 | ||
872 | for (i = 0; cluster->cl_group.default_groups[i]; i++) { | |
873 | killme = &cluster->cl_group.default_groups[i]->cg_item; | |
874 | cluster->cl_group.default_groups[i] = NULL; | |
875 | config_item_put(killme); | |
876 | } | |
877 | ||
878 | config_item_put(item); | |
879 | } | |
880 | ||
881 | static struct configfs_group_operations o2nm_cluster_group_group_ops = { | |
882 | .make_group = o2nm_cluster_group_make_group, | |
883 | .drop_item = o2nm_cluster_group_drop_item, | |
884 | }; | |
885 | ||
886 | static struct config_item_type o2nm_cluster_group_type = { | |
887 | .ct_group_ops = &o2nm_cluster_group_group_ops, | |
888 | .ct_owner = THIS_MODULE, | |
889 | }; | |
890 | ||
891 | static struct o2nm_cluster_group o2nm_cluster_group = { | |
892 | .cs_subsys = { | |
893 | .su_group = { | |
894 | .cg_item = { | |
895 | .ci_namebuf = "cluster", | |
896 | .ci_type = &o2nm_cluster_group_type, | |
897 | }, | |
898 | }, | |
899 | }, | |
900 | }; | |
901 | ||
14829422 JB |
902 | int o2nm_depend_item(struct config_item *item) |
903 | { | |
904 | return configfs_depend_item(&o2nm_cluster_group.cs_subsys, item); | |
905 | } | |
906 | ||
907 | void o2nm_undepend_item(struct config_item *item) | |
908 | { | |
909 | configfs_undepend_item(&o2nm_cluster_group.cs_subsys, item); | |
910 | } | |
911 | ||
16c6a4f2 JB |
912 | int o2nm_depend_this_node(void) |
913 | { | |
914 | int ret = 0; | |
915 | struct o2nm_node *local_node; | |
916 | ||
917 | local_node = o2nm_get_node_by_num(o2nm_this_node()); | |
918 | if (!local_node) { | |
919 | ret = -EINVAL; | |
920 | goto out; | |
921 | } | |
922 | ||
923 | ret = o2nm_depend_item(&local_node->nd_item); | |
924 | o2nm_node_put(local_node); | |
925 | ||
926 | out: | |
927 | return ret; | |
928 | } | |
929 | ||
930 | void o2nm_undepend_this_node(void) | |
931 | { | |
932 | struct o2nm_node *local_node; | |
933 | ||
934 | local_node = o2nm_get_node_by_num(o2nm_this_node()); | |
935 | BUG_ON(!local_node); | |
936 | ||
937 | o2nm_undepend_item(&local_node->nd_item); | |
938 | o2nm_node_put(local_node); | |
939 | } | |
940 | ||
941 | ||
0c83ed8e KH |
942 | static void __exit exit_o2nm(void) |
943 | { | |
944 | if (ocfs2_table_header) | |
945 | unregister_sysctl_table(ocfs2_table_header); | |
946 | ||
947 | /* XXX sync with hb callbacks and shut down hb? */ | |
948 | o2net_unregister_hb_callbacks(); | |
949 | configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys); | |
950 | o2cb_sys_shutdown(); | |
951 | ||
952 | o2net_exit(); | |
953 | } | |
954 | ||
955 | static int __init init_o2nm(void) | |
956 | { | |
957 | int ret = -1; | |
958 | ||
959 | cluster_print_version(); | |
960 | ||
961 | o2hb_init(); | |
962 | o2net_init(); | |
963 | ||
0b4d4147 | 964 | ocfs2_table_header = register_sysctl_table(ocfs2_root_table); |
0c83ed8e KH |
965 | if (!ocfs2_table_header) { |
966 | printk(KERN_ERR "nodemanager: unable to register sysctl\n"); | |
967 | ret = -ENOMEM; /* or something. */ | |
895928b8 | 968 | goto out_o2net; |
0c83ed8e KH |
969 | } |
970 | ||
971 | ret = o2net_register_hb_callbacks(); | |
972 | if (ret) | |
973 | goto out_sysctl; | |
974 | ||
975 | config_group_init(&o2nm_cluster_group.cs_subsys.su_group); | |
e6bd07ae | 976 | mutex_init(&o2nm_cluster_group.cs_subsys.su_mutex); |
0c83ed8e KH |
977 | ret = configfs_register_subsystem(&o2nm_cluster_group.cs_subsys); |
978 | if (ret) { | |
979 | printk(KERN_ERR "nodemanager: Registration returned %d\n", ret); | |
980 | goto out_callbacks; | |
981 | } | |
982 | ||
983 | ret = o2cb_sys_init(); | |
984 | if (!ret) | |
985 | goto out; | |
986 | ||
987 | configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys); | |
988 | out_callbacks: | |
989 | o2net_unregister_hb_callbacks(); | |
990 | out_sysctl: | |
991 | unregister_sysctl_table(ocfs2_table_header); | |
895928b8 JM |
992 | out_o2net: |
993 | o2net_exit(); | |
0c83ed8e KH |
994 | out: |
995 | return ret; | |
996 | } | |
997 | ||
998 | MODULE_AUTHOR("Oracle"); | |
999 | MODULE_LICENSE("GPL"); | |
1000 | ||
1001 | module_init(init_o2nm) | |
1002 | module_exit(exit_o2nm) |