Kurt Hackel | 0c83ed8 | 2005-12-15 14:31:23 -0800 | [diff] [blame] | 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 | |
| 27 | #include "endian.h" |
| 28 | #include "tcp.h" |
| 29 | #include "nodemanager.h" |
| 30 | #include "heartbeat.h" |
| 31 | #include "masklog.h" |
| 32 | #include "sys.h" |
| 33 | #include "ver.h" |
| 34 | |
| 35 | /* for now we operate under the assertion that there can be only one |
| 36 | * cluster active at a time. Changing this will require trickling |
| 37 | * cluster references throughout where nodes are looked up */ |
| 38 | static struct o2nm_cluster *o2nm_single_cluster = NULL; |
| 39 | |
| 40 | #define OCFS2_MAX_HB_CTL_PATH 256 |
| 41 | static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl"; |
| 42 | |
| 43 | static ctl_table ocfs2_nm_table[] = { |
| 44 | { |
| 45 | .ctl_name = 1, |
| 46 | .procname = "hb_ctl_path", |
| 47 | .data = ocfs2_hb_ctl_path, |
| 48 | .maxlen = OCFS2_MAX_HB_CTL_PATH, |
| 49 | .mode = 0644, |
| 50 | .proc_handler = &proc_dostring, |
| 51 | .strategy = &sysctl_string, |
| 52 | }, |
| 53 | { .ctl_name = 0 } |
| 54 | }; |
| 55 | |
| 56 | static ctl_table ocfs2_mod_table[] = { |
| 57 | { |
| 58 | .ctl_name = KERN_OCFS2_NM, |
| 59 | .procname = "nm", |
| 60 | .data = NULL, |
| 61 | .maxlen = 0, |
| 62 | .mode = 0555, |
| 63 | .child = ocfs2_nm_table |
| 64 | }, |
| 65 | { .ctl_name = 0} |
| 66 | }; |
| 67 | |
| 68 | static ctl_table ocfs2_kern_table[] = { |
| 69 | { |
| 70 | .ctl_name = KERN_OCFS2, |
| 71 | .procname = "ocfs2", |
| 72 | .data = NULL, |
| 73 | .maxlen = 0, |
| 74 | .mode = 0555, |
| 75 | .child = ocfs2_mod_table |
| 76 | }, |
| 77 | { .ctl_name = 0} |
| 78 | }; |
| 79 | |
| 80 | static ctl_table ocfs2_root_table[] = { |
| 81 | { |
| 82 | .ctl_name = CTL_FS, |
| 83 | .procname = "fs", |
| 84 | .data = NULL, |
| 85 | .maxlen = 0, |
| 86 | .mode = 0555, |
| 87 | .child = ocfs2_kern_table |
| 88 | }, |
| 89 | { .ctl_name = 0 } |
| 90 | }; |
| 91 | |
| 92 | static struct ctl_table_header *ocfs2_table_header = NULL; |
| 93 | |
| 94 | const char *o2nm_get_hb_ctl_path(void) |
| 95 | { |
| 96 | return ocfs2_hb_ctl_path; |
| 97 | } |
| 98 | EXPORT_SYMBOL_GPL(o2nm_get_hb_ctl_path); |
| 99 | |
| 100 | struct o2nm_cluster { |
| 101 | struct config_group cl_group; |
| 102 | unsigned cl_has_local:1; |
| 103 | u8 cl_local_node; |
| 104 | rwlock_t cl_nodes_lock; |
| 105 | struct o2nm_node *cl_nodes[O2NM_MAX_NODES]; |
| 106 | struct rb_root cl_node_ip_tree; |
| 107 | /* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */ |
| 108 | unsigned long cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)]; |
| 109 | }; |
| 110 | |
| 111 | struct o2nm_node *o2nm_get_node_by_num(u8 node_num) |
| 112 | { |
| 113 | struct o2nm_node *node = NULL; |
| 114 | |
| 115 | if (node_num >= O2NM_MAX_NODES || o2nm_single_cluster == NULL) |
| 116 | goto out; |
| 117 | |
| 118 | read_lock(&o2nm_single_cluster->cl_nodes_lock); |
| 119 | node = o2nm_single_cluster->cl_nodes[node_num]; |
| 120 | if (node) |
| 121 | config_item_get(&node->nd_item); |
| 122 | read_unlock(&o2nm_single_cluster->cl_nodes_lock); |
| 123 | out: |
| 124 | return node; |
| 125 | } |
| 126 | EXPORT_SYMBOL_GPL(o2nm_get_node_by_num); |
| 127 | |
| 128 | int o2nm_configured_node_map(unsigned long *map, unsigned bytes) |
| 129 | { |
| 130 | struct o2nm_cluster *cluster = o2nm_single_cluster; |
| 131 | |
| 132 | BUG_ON(bytes < (sizeof(cluster->cl_nodes_bitmap))); |
| 133 | |
| 134 | if (cluster == NULL) |
| 135 | return -EINVAL; |
| 136 | |
| 137 | read_lock(&cluster->cl_nodes_lock); |
| 138 | memcpy(map, cluster->cl_nodes_bitmap, sizeof(cluster->cl_nodes_bitmap)); |
| 139 | read_unlock(&cluster->cl_nodes_lock); |
| 140 | |
| 141 | return 0; |
| 142 | } |
| 143 | EXPORT_SYMBOL_GPL(o2nm_configured_node_map); |
| 144 | |
| 145 | static struct o2nm_node *o2nm_node_ip_tree_lookup(struct o2nm_cluster *cluster, |
| 146 | __be32 ip_needle, |
| 147 | struct rb_node ***ret_p, |
| 148 | struct rb_node **ret_parent) |
| 149 | { |
| 150 | struct rb_node **p = &cluster->cl_node_ip_tree.rb_node; |
| 151 | struct rb_node *parent = NULL; |
| 152 | struct o2nm_node *node, *ret = NULL; |
| 153 | |
| 154 | while (*p) { |
| 155 | parent = *p; |
| 156 | node = rb_entry(parent, struct o2nm_node, nd_ip_node); |
| 157 | |
| 158 | if (memcmp(&ip_needle, &node->nd_ipv4_address, |
| 159 | sizeof(ip_needle)) < 0) |
| 160 | p = &(*p)->rb_left; |
| 161 | else if (memcmp(&ip_needle, &node->nd_ipv4_address, |
| 162 | sizeof(ip_needle)) > 0) |
| 163 | p = &(*p)->rb_right; |
| 164 | else { |
| 165 | ret = node; |
| 166 | break; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | if (ret_p != NULL) |
| 171 | *ret_p = p; |
| 172 | if (ret_parent != NULL) |
| 173 | *ret_parent = parent; |
| 174 | |
| 175 | return ret; |
| 176 | } |
| 177 | |
| 178 | struct o2nm_node *o2nm_get_node_by_ip(__be32 addr) |
| 179 | { |
| 180 | struct o2nm_node *node = NULL; |
| 181 | struct o2nm_cluster *cluster = o2nm_single_cluster; |
| 182 | |
| 183 | if (cluster == NULL) |
| 184 | goto out; |
| 185 | |
| 186 | read_lock(&cluster->cl_nodes_lock); |
| 187 | node = o2nm_node_ip_tree_lookup(cluster, addr, NULL, NULL); |
| 188 | if (node) |
| 189 | config_item_get(&node->nd_item); |
| 190 | read_unlock(&cluster->cl_nodes_lock); |
| 191 | |
| 192 | out: |
| 193 | return node; |
| 194 | } |
| 195 | EXPORT_SYMBOL_GPL(o2nm_get_node_by_ip); |
| 196 | |
| 197 | void o2nm_node_put(struct o2nm_node *node) |
| 198 | { |
| 199 | config_item_put(&node->nd_item); |
| 200 | } |
| 201 | EXPORT_SYMBOL_GPL(o2nm_node_put); |
| 202 | |
| 203 | void o2nm_node_get(struct o2nm_node *node) |
| 204 | { |
| 205 | config_item_get(&node->nd_item); |
| 206 | } |
| 207 | EXPORT_SYMBOL_GPL(o2nm_node_get); |
| 208 | |
| 209 | u8 o2nm_this_node(void) |
| 210 | { |
| 211 | u8 node_num = O2NM_MAX_NODES; |
| 212 | |
| 213 | if (o2nm_single_cluster && o2nm_single_cluster->cl_has_local) |
| 214 | node_num = o2nm_single_cluster->cl_local_node; |
| 215 | |
| 216 | return node_num; |
| 217 | } |
| 218 | EXPORT_SYMBOL_GPL(o2nm_this_node); |
| 219 | |
| 220 | /* node configfs bits */ |
| 221 | |
| 222 | static struct o2nm_cluster *to_o2nm_cluster(struct config_item *item) |
| 223 | { |
| 224 | return item ? |
| 225 | container_of(to_config_group(item), struct o2nm_cluster, |
| 226 | cl_group) |
| 227 | : NULL; |
| 228 | } |
| 229 | |
| 230 | static struct o2nm_node *to_o2nm_node(struct config_item *item) |
| 231 | { |
| 232 | return item ? container_of(item, struct o2nm_node, nd_item) : NULL; |
| 233 | } |
| 234 | |
| 235 | static void o2nm_node_release(struct config_item *item) |
| 236 | { |
| 237 | struct o2nm_node *node = to_o2nm_node(item); |
| 238 | kfree(node); |
| 239 | } |
| 240 | |
| 241 | static ssize_t o2nm_node_num_read(struct o2nm_node *node, char *page) |
| 242 | { |
| 243 | return sprintf(page, "%d\n", node->nd_num); |
| 244 | } |
| 245 | |
| 246 | static struct o2nm_cluster *to_o2nm_cluster_from_node(struct o2nm_node *node) |
| 247 | { |
| 248 | /* through the first node_set .parent |
| 249 | * mycluster/nodes/mynode == o2nm_cluster->o2nm_node_group->o2nm_node */ |
| 250 | return to_o2nm_cluster(node->nd_item.ci_parent->ci_parent); |
| 251 | } |
| 252 | |
| 253 | enum { |
| 254 | O2NM_NODE_ATTR_NUM = 0, |
| 255 | O2NM_NODE_ATTR_PORT, |
| 256 | O2NM_NODE_ATTR_ADDRESS, |
| 257 | O2NM_NODE_ATTR_LOCAL, |
| 258 | }; |
| 259 | |
| 260 | static ssize_t o2nm_node_num_write(struct o2nm_node *node, const char *page, |
| 261 | size_t count) |
| 262 | { |
| 263 | struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node); |
| 264 | unsigned long tmp; |
| 265 | char *p = (char *)page; |
| 266 | |
| 267 | tmp = simple_strtoul(p, &p, 0); |
| 268 | if (!p || (*p && (*p != '\n'))) |
| 269 | return -EINVAL; |
| 270 | |
| 271 | if (tmp >= O2NM_MAX_NODES) |
| 272 | return -ERANGE; |
| 273 | |
| 274 | /* once we're in the cl_nodes tree networking can look us up by |
| 275 | * node number and try to use our address and port attributes |
| 276 | * to connect to this node.. make sure that they've been set |
| 277 | * before writing the node attribute? */ |
| 278 | if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) || |
| 279 | !test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes)) |
| 280 | return -EINVAL; /* XXX */ |
| 281 | |
| 282 | write_lock(&cluster->cl_nodes_lock); |
| 283 | if (cluster->cl_nodes[tmp]) |
| 284 | p = NULL; |
| 285 | else { |
| 286 | cluster->cl_nodes[tmp] = node; |
| 287 | node->nd_num = tmp; |
| 288 | set_bit(tmp, cluster->cl_nodes_bitmap); |
| 289 | } |
| 290 | write_unlock(&cluster->cl_nodes_lock); |
| 291 | if (p == NULL) |
| 292 | return -EEXIST; |
| 293 | |
| 294 | return count; |
| 295 | } |
| 296 | static ssize_t o2nm_node_ipv4_port_read(struct o2nm_node *node, char *page) |
| 297 | { |
| 298 | return sprintf(page, "%u\n", ntohs(node->nd_ipv4_port)); |
| 299 | } |
| 300 | |
| 301 | static ssize_t o2nm_node_ipv4_port_write(struct o2nm_node *node, |
| 302 | const char *page, size_t count) |
| 303 | { |
| 304 | unsigned long tmp; |
| 305 | char *p = (char *)page; |
| 306 | |
| 307 | tmp = simple_strtoul(p, &p, 0); |
| 308 | if (!p || (*p && (*p != '\n'))) |
| 309 | return -EINVAL; |
| 310 | |
| 311 | if (tmp == 0) |
| 312 | return -EINVAL; |
| 313 | if (tmp >= (u16)-1) |
| 314 | return -ERANGE; |
| 315 | |
| 316 | node->nd_ipv4_port = htons(tmp); |
| 317 | |
| 318 | return count; |
| 319 | } |
| 320 | |
| 321 | static ssize_t o2nm_node_ipv4_address_read(struct o2nm_node *node, char *page) |
| 322 | { |
| 323 | return sprintf(page, "%u.%u.%u.%u\n", NIPQUAD(node->nd_ipv4_address)); |
| 324 | } |
| 325 | |
| 326 | static ssize_t o2nm_node_ipv4_address_write(struct o2nm_node *node, |
| 327 | const char *page, |
| 328 | size_t count) |
| 329 | { |
| 330 | struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node); |
| 331 | int ret, i; |
| 332 | struct rb_node **p, *parent; |
| 333 | unsigned int octets[4]; |
| 334 | __be32 ipv4_addr = 0; |
| 335 | |
| 336 | ret = sscanf(page, "%3u.%3u.%3u.%3u", &octets[3], &octets[2], |
| 337 | &octets[1], &octets[0]); |
| 338 | if (ret != 4) |
| 339 | return -EINVAL; |
| 340 | |
| 341 | for (i = 0; i < ARRAY_SIZE(octets); i++) { |
| 342 | if (octets[i] > 255) |
| 343 | return -ERANGE; |
| 344 | be32_add_cpu(&ipv4_addr, octets[i] << (i * 8)); |
| 345 | } |
| 346 | |
| 347 | ret = 0; |
| 348 | write_lock(&cluster->cl_nodes_lock); |
| 349 | if (o2nm_node_ip_tree_lookup(cluster, ipv4_addr, &p, &parent)) |
| 350 | ret = -EEXIST; |
| 351 | else { |
| 352 | rb_link_node(&node->nd_ip_node, parent, p); |
| 353 | rb_insert_color(&node->nd_ip_node, &cluster->cl_node_ip_tree); |
| 354 | } |
| 355 | write_unlock(&cluster->cl_nodes_lock); |
| 356 | if (ret) |
| 357 | return ret; |
| 358 | |
| 359 | memcpy(&node->nd_ipv4_address, &ipv4_addr, sizeof(ipv4_addr)); |
| 360 | |
| 361 | return count; |
| 362 | } |
| 363 | |
| 364 | static ssize_t o2nm_node_local_read(struct o2nm_node *node, char *page) |
| 365 | { |
| 366 | return sprintf(page, "%d\n", node->nd_local); |
| 367 | } |
| 368 | |
| 369 | static ssize_t o2nm_node_local_write(struct o2nm_node *node, const char *page, |
| 370 | size_t count) |
| 371 | { |
| 372 | struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node); |
| 373 | unsigned long tmp; |
| 374 | char *p = (char *)page; |
| 375 | ssize_t ret; |
| 376 | |
| 377 | tmp = simple_strtoul(p, &p, 0); |
| 378 | if (!p || (*p && (*p != '\n'))) |
| 379 | return -EINVAL; |
| 380 | |
| 381 | tmp = !!tmp; /* boolean of whether this node wants to be local */ |
| 382 | |
| 383 | /* setting local turns on networking rx for now so we require having |
| 384 | * set everything else first */ |
| 385 | if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) || |
| 386 | !test_bit(O2NM_NODE_ATTR_NUM, &node->nd_set_attributes) || |
| 387 | !test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes)) |
| 388 | return -EINVAL; /* XXX */ |
| 389 | |
| 390 | /* the only failure case is trying to set a new local node |
| 391 | * when a different one is already set */ |
| 392 | if (tmp && tmp == cluster->cl_has_local && |
| 393 | cluster->cl_local_node != node->nd_num) |
| 394 | return -EBUSY; |
| 395 | |
| 396 | /* bring up the rx thread if we're setting the new local node. */ |
| 397 | if (tmp && !cluster->cl_has_local) { |
| 398 | ret = o2net_start_listening(node); |
| 399 | if (ret) |
| 400 | return ret; |
| 401 | } |
| 402 | |
| 403 | if (!tmp && cluster->cl_has_local && |
| 404 | cluster->cl_local_node == node->nd_num) { |
| 405 | o2net_stop_listening(node); |
| 406 | cluster->cl_local_node = O2NM_INVALID_NODE_NUM; |
| 407 | } |
| 408 | |
| 409 | node->nd_local = tmp; |
| 410 | if (node->nd_local) { |
| 411 | cluster->cl_has_local = tmp; |
| 412 | cluster->cl_local_node = node->nd_num; |
| 413 | } |
| 414 | |
| 415 | return count; |
| 416 | } |
| 417 | |
| 418 | struct o2nm_node_attribute { |
| 419 | struct configfs_attribute attr; |
| 420 | ssize_t (*show)(struct o2nm_node *, char *); |
| 421 | ssize_t (*store)(struct o2nm_node *, const char *, size_t); |
| 422 | }; |
| 423 | |
| 424 | static struct o2nm_node_attribute o2nm_node_attr_num = { |
| 425 | .attr = { .ca_owner = THIS_MODULE, |
| 426 | .ca_name = "num", |
| 427 | .ca_mode = S_IRUGO | S_IWUSR }, |
| 428 | .show = o2nm_node_num_read, |
| 429 | .store = o2nm_node_num_write, |
| 430 | }; |
| 431 | |
| 432 | static struct o2nm_node_attribute o2nm_node_attr_ipv4_port = { |
| 433 | .attr = { .ca_owner = THIS_MODULE, |
| 434 | .ca_name = "ipv4_port", |
| 435 | .ca_mode = S_IRUGO | S_IWUSR }, |
| 436 | .show = o2nm_node_ipv4_port_read, |
| 437 | .store = o2nm_node_ipv4_port_write, |
| 438 | }; |
| 439 | |
| 440 | static struct o2nm_node_attribute o2nm_node_attr_ipv4_address = { |
| 441 | .attr = { .ca_owner = THIS_MODULE, |
| 442 | .ca_name = "ipv4_address", |
| 443 | .ca_mode = S_IRUGO | S_IWUSR }, |
| 444 | .show = o2nm_node_ipv4_address_read, |
| 445 | .store = o2nm_node_ipv4_address_write, |
| 446 | }; |
| 447 | |
| 448 | static struct o2nm_node_attribute o2nm_node_attr_local = { |
| 449 | .attr = { .ca_owner = THIS_MODULE, |
| 450 | .ca_name = "local", |
| 451 | .ca_mode = S_IRUGO | S_IWUSR }, |
| 452 | .show = o2nm_node_local_read, |
| 453 | .store = o2nm_node_local_write, |
| 454 | }; |
| 455 | |
| 456 | static struct configfs_attribute *o2nm_node_attrs[] = { |
| 457 | [O2NM_NODE_ATTR_NUM] = &o2nm_node_attr_num.attr, |
| 458 | [O2NM_NODE_ATTR_PORT] = &o2nm_node_attr_ipv4_port.attr, |
| 459 | [O2NM_NODE_ATTR_ADDRESS] = &o2nm_node_attr_ipv4_address.attr, |
| 460 | [O2NM_NODE_ATTR_LOCAL] = &o2nm_node_attr_local.attr, |
| 461 | NULL, |
| 462 | }; |
| 463 | |
| 464 | static int o2nm_attr_index(struct configfs_attribute *attr) |
| 465 | { |
| 466 | int i; |
| 467 | for (i = 0; i < ARRAY_SIZE(o2nm_node_attrs); i++) { |
| 468 | if (attr == o2nm_node_attrs[i]) |
| 469 | return i; |
| 470 | } |
| 471 | BUG(); |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | static ssize_t o2nm_node_show(struct config_item *item, |
| 476 | struct configfs_attribute *attr, |
| 477 | char *page) |
| 478 | { |
| 479 | struct o2nm_node *node = to_o2nm_node(item); |
| 480 | struct o2nm_node_attribute *o2nm_node_attr = |
| 481 | container_of(attr, struct o2nm_node_attribute, attr); |
| 482 | ssize_t ret = 0; |
| 483 | |
| 484 | if (o2nm_node_attr->show) |
| 485 | ret = o2nm_node_attr->show(node, page); |
| 486 | return ret; |
| 487 | } |
| 488 | |
| 489 | static ssize_t o2nm_node_store(struct config_item *item, |
| 490 | struct configfs_attribute *attr, |
| 491 | const char *page, size_t count) |
| 492 | { |
| 493 | struct o2nm_node *node = to_o2nm_node(item); |
| 494 | struct o2nm_node_attribute *o2nm_node_attr = |
| 495 | container_of(attr, struct o2nm_node_attribute, attr); |
| 496 | ssize_t ret; |
| 497 | int attr_index = o2nm_attr_index(attr); |
| 498 | |
| 499 | if (o2nm_node_attr->store == NULL) { |
| 500 | ret = -EINVAL; |
| 501 | goto out; |
| 502 | } |
| 503 | |
| 504 | if (test_bit(attr_index, &node->nd_set_attributes)) |
| 505 | return -EBUSY; |
| 506 | |
| 507 | ret = o2nm_node_attr->store(node, page, count); |
| 508 | if (ret < count) |
| 509 | goto out; |
| 510 | |
| 511 | set_bit(attr_index, &node->nd_set_attributes); |
| 512 | out: |
| 513 | return ret; |
| 514 | } |
| 515 | |
| 516 | static struct configfs_item_operations o2nm_node_item_ops = { |
| 517 | .release = o2nm_node_release, |
| 518 | .show_attribute = o2nm_node_show, |
| 519 | .store_attribute = o2nm_node_store, |
| 520 | }; |
| 521 | |
| 522 | static struct config_item_type o2nm_node_type = { |
| 523 | .ct_item_ops = &o2nm_node_item_ops, |
| 524 | .ct_attrs = o2nm_node_attrs, |
| 525 | .ct_owner = THIS_MODULE, |
| 526 | }; |
| 527 | |
| 528 | /* node set */ |
| 529 | |
| 530 | struct o2nm_node_group { |
| 531 | struct config_group ns_group; |
| 532 | /* some stuff? */ |
| 533 | }; |
| 534 | |
| 535 | #if 0 |
| 536 | static struct o2nm_node_group *to_o2nm_node_group(struct config_group *group) |
| 537 | { |
| 538 | return group ? |
| 539 | container_of(group, struct o2nm_node_group, ns_group) |
| 540 | : NULL; |
| 541 | } |
| 542 | #endif |
| 543 | |
| 544 | static struct config_item *o2nm_node_group_make_item(struct config_group *group, |
| 545 | const char *name) |
| 546 | { |
| 547 | struct o2nm_node *node = NULL; |
| 548 | struct config_item *ret = NULL; |
| 549 | |
| 550 | if (strlen(name) > O2NM_MAX_NAME_LEN) |
| 551 | goto out; /* ENAMETOOLONG */ |
| 552 | |
| 553 | node = kcalloc(1, sizeof(struct o2nm_node), GFP_KERNEL); |
| 554 | if (node == NULL) |
| 555 | goto out; /* ENOMEM */ |
| 556 | |
| 557 | strcpy(node->nd_name, name); /* use item.ci_namebuf instead? */ |
| 558 | config_item_init_type_name(&node->nd_item, name, &o2nm_node_type); |
| 559 | spin_lock_init(&node->nd_lock); |
| 560 | |
| 561 | ret = &node->nd_item; |
| 562 | |
| 563 | out: |
| 564 | if (ret == NULL) |
| 565 | kfree(node); |
| 566 | |
| 567 | return ret; |
| 568 | } |
| 569 | |
| 570 | static void o2nm_node_group_drop_item(struct config_group *group, |
| 571 | struct config_item *item) |
| 572 | { |
| 573 | struct o2nm_node *node = to_o2nm_node(item); |
| 574 | struct o2nm_cluster *cluster = to_o2nm_cluster(group->cg_item.ci_parent); |
| 575 | |
| 576 | o2net_disconnect_node(node); |
| 577 | |
| 578 | if (cluster->cl_has_local && |
| 579 | (cluster->cl_local_node == node->nd_num)) { |
| 580 | cluster->cl_has_local = 0; |
| 581 | cluster->cl_local_node = O2NM_INVALID_NODE_NUM; |
| 582 | o2net_stop_listening(node); |
| 583 | } |
| 584 | |
| 585 | /* XXX call into net to stop this node from trading messages */ |
| 586 | |
| 587 | write_lock(&cluster->cl_nodes_lock); |
| 588 | |
| 589 | /* XXX sloppy */ |
| 590 | if (node->nd_ipv4_address) |
| 591 | rb_erase(&node->nd_ip_node, &cluster->cl_node_ip_tree); |
| 592 | |
| 593 | /* nd_num might be 0 if the node number hasn't been set.. */ |
| 594 | if (cluster->cl_nodes[node->nd_num] == node) { |
| 595 | cluster->cl_nodes[node->nd_num] = NULL; |
| 596 | clear_bit(node->nd_num, cluster->cl_nodes_bitmap); |
| 597 | } |
| 598 | write_unlock(&cluster->cl_nodes_lock); |
| 599 | |
| 600 | config_item_put(item); |
| 601 | } |
| 602 | |
| 603 | static struct configfs_group_operations o2nm_node_group_group_ops = { |
| 604 | .make_item = o2nm_node_group_make_item, |
| 605 | .drop_item = o2nm_node_group_drop_item, |
| 606 | }; |
| 607 | |
| 608 | static struct config_item_type o2nm_node_group_type = { |
| 609 | .ct_group_ops = &o2nm_node_group_group_ops, |
| 610 | .ct_owner = THIS_MODULE, |
| 611 | }; |
| 612 | |
| 613 | /* cluster */ |
| 614 | |
| 615 | static void o2nm_cluster_release(struct config_item *item) |
| 616 | { |
| 617 | struct o2nm_cluster *cluster = to_o2nm_cluster(item); |
| 618 | |
| 619 | kfree(cluster->cl_group.default_groups); |
| 620 | kfree(cluster); |
| 621 | } |
| 622 | |
| 623 | static struct configfs_item_operations o2nm_cluster_item_ops = { |
| 624 | .release = o2nm_cluster_release, |
| 625 | }; |
| 626 | |
| 627 | static struct config_item_type o2nm_cluster_type = { |
| 628 | .ct_item_ops = &o2nm_cluster_item_ops, |
| 629 | .ct_owner = THIS_MODULE, |
| 630 | }; |
| 631 | |
| 632 | /* cluster set */ |
| 633 | |
| 634 | struct o2nm_cluster_group { |
| 635 | struct configfs_subsystem cs_subsys; |
| 636 | /* some stuff? */ |
| 637 | }; |
| 638 | |
| 639 | #if 0 |
| 640 | static struct o2nm_cluster_group *to_o2nm_cluster_group(struct config_group *group) |
| 641 | { |
| 642 | return group ? |
| 643 | container_of(to_configfs_subsystem(group), struct o2nm_cluster_group, cs_subsys) |
| 644 | : NULL; |
| 645 | } |
| 646 | #endif |
| 647 | |
| 648 | static struct config_group *o2nm_cluster_group_make_group(struct config_group *group, |
| 649 | const char *name) |
| 650 | { |
| 651 | struct o2nm_cluster *cluster = NULL; |
| 652 | struct o2nm_node_group *ns = NULL; |
| 653 | struct config_group *o2hb_group = NULL, *ret = NULL; |
| 654 | void *defs = NULL; |
| 655 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame^] | 656 | /* this runs under the parent dir's i_mutex; there can be only |
Kurt Hackel | 0c83ed8 | 2005-12-15 14:31:23 -0800 | [diff] [blame] | 657 | * one caller in here at a time */ |
| 658 | if (o2nm_single_cluster) |
| 659 | goto out; /* ENOSPC */ |
| 660 | |
| 661 | cluster = kcalloc(1, sizeof(struct o2nm_cluster), GFP_KERNEL); |
| 662 | ns = kcalloc(1, sizeof(struct o2nm_node_group), GFP_KERNEL); |
| 663 | defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); |
| 664 | o2hb_group = o2hb_alloc_hb_set(); |
| 665 | if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL) |
| 666 | goto out; |
| 667 | |
| 668 | config_group_init_type_name(&cluster->cl_group, name, |
| 669 | &o2nm_cluster_type); |
| 670 | config_group_init_type_name(&ns->ns_group, "node", |
| 671 | &o2nm_node_group_type); |
| 672 | |
| 673 | cluster->cl_group.default_groups = defs; |
| 674 | cluster->cl_group.default_groups[0] = &ns->ns_group; |
| 675 | cluster->cl_group.default_groups[1] = o2hb_group; |
| 676 | cluster->cl_group.default_groups[2] = NULL; |
| 677 | rwlock_init(&cluster->cl_nodes_lock); |
| 678 | cluster->cl_node_ip_tree = RB_ROOT; |
| 679 | |
| 680 | ret = &cluster->cl_group; |
| 681 | o2nm_single_cluster = cluster; |
| 682 | |
| 683 | out: |
| 684 | if (ret == NULL) { |
| 685 | kfree(cluster); |
| 686 | kfree(ns); |
| 687 | o2hb_free_hb_set(o2hb_group); |
| 688 | kfree(defs); |
| 689 | } |
| 690 | |
| 691 | return ret; |
| 692 | } |
| 693 | |
| 694 | static void o2nm_cluster_group_drop_item(struct config_group *group, struct config_item *item) |
| 695 | { |
| 696 | struct o2nm_cluster *cluster = to_o2nm_cluster(item); |
| 697 | int i; |
| 698 | struct config_item *killme; |
| 699 | |
| 700 | BUG_ON(o2nm_single_cluster != cluster); |
| 701 | o2nm_single_cluster = NULL; |
| 702 | |
| 703 | for (i = 0; cluster->cl_group.default_groups[i]; i++) { |
| 704 | killme = &cluster->cl_group.default_groups[i]->cg_item; |
| 705 | cluster->cl_group.default_groups[i] = NULL; |
| 706 | config_item_put(killme); |
| 707 | } |
| 708 | |
| 709 | config_item_put(item); |
| 710 | } |
| 711 | |
| 712 | static struct configfs_group_operations o2nm_cluster_group_group_ops = { |
| 713 | .make_group = o2nm_cluster_group_make_group, |
| 714 | .drop_item = o2nm_cluster_group_drop_item, |
| 715 | }; |
| 716 | |
| 717 | static struct config_item_type o2nm_cluster_group_type = { |
| 718 | .ct_group_ops = &o2nm_cluster_group_group_ops, |
| 719 | .ct_owner = THIS_MODULE, |
| 720 | }; |
| 721 | |
| 722 | static struct o2nm_cluster_group o2nm_cluster_group = { |
| 723 | .cs_subsys = { |
| 724 | .su_group = { |
| 725 | .cg_item = { |
| 726 | .ci_namebuf = "cluster", |
| 727 | .ci_type = &o2nm_cluster_group_type, |
| 728 | }, |
| 729 | }, |
| 730 | }, |
| 731 | }; |
| 732 | |
| 733 | static void __exit exit_o2nm(void) |
| 734 | { |
| 735 | if (ocfs2_table_header) |
| 736 | unregister_sysctl_table(ocfs2_table_header); |
| 737 | |
| 738 | /* XXX sync with hb callbacks and shut down hb? */ |
| 739 | o2net_unregister_hb_callbacks(); |
| 740 | configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys); |
| 741 | o2cb_sys_shutdown(); |
| 742 | |
| 743 | o2net_exit(); |
| 744 | } |
| 745 | |
| 746 | static int __init init_o2nm(void) |
| 747 | { |
| 748 | int ret = -1; |
| 749 | |
| 750 | cluster_print_version(); |
| 751 | |
| 752 | o2hb_init(); |
| 753 | o2net_init(); |
| 754 | |
| 755 | ocfs2_table_header = register_sysctl_table(ocfs2_root_table, 0); |
| 756 | if (!ocfs2_table_header) { |
| 757 | printk(KERN_ERR "nodemanager: unable to register sysctl\n"); |
| 758 | ret = -ENOMEM; /* or something. */ |
| 759 | goto out; |
| 760 | } |
| 761 | |
| 762 | ret = o2net_register_hb_callbacks(); |
| 763 | if (ret) |
| 764 | goto out_sysctl; |
| 765 | |
| 766 | config_group_init(&o2nm_cluster_group.cs_subsys.su_group); |
| 767 | init_MUTEX(&o2nm_cluster_group.cs_subsys.su_sem); |
| 768 | ret = configfs_register_subsystem(&o2nm_cluster_group.cs_subsys); |
| 769 | if (ret) { |
| 770 | printk(KERN_ERR "nodemanager: Registration returned %d\n", ret); |
| 771 | goto out_callbacks; |
| 772 | } |
| 773 | |
| 774 | ret = o2cb_sys_init(); |
| 775 | if (!ret) |
| 776 | goto out; |
| 777 | |
| 778 | configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys); |
| 779 | out_callbacks: |
| 780 | o2net_unregister_hb_callbacks(); |
| 781 | out_sysctl: |
| 782 | unregister_sysctl_table(ocfs2_table_header); |
| 783 | out: |
| 784 | return ret; |
| 785 | } |
| 786 | |
| 787 | MODULE_AUTHOR("Oracle"); |
| 788 | MODULE_LICENSE("GPL"); |
| 789 | |
| 790 | module_init(init_o2nm) |
| 791 | module_exit(exit_o2nm) |