diff options
Diffstat (limited to 'ctdb/common/ctdb_message.c')
-rw-r--r-- | ctdb/common/ctdb_message.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/ctdb/common/ctdb_message.c b/ctdb/common/ctdb_message.c deleted file mode 100644 index 0e19761da3d..00000000000 --- a/ctdb/common/ctdb_message.c +++ /dev/null @@ -1,286 +0,0 @@ -/* - ctdb_message protocol code - - Copyright (C) Andrew Tridgell 2007 - Copyright (C) Amitay Isaacs 2013 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, see <http://www.gnu.org/licenses/>. -*/ -/* - see http://wiki.samba.org/index.php/Samba_%26_Clustering for - protocol design and packet details -*/ -#include "includes.h" -#include "tdb.h" -#include "system/network.h" -#include "system/filesys.h" -#include "../include/ctdb_private.h" -#include "lib/util/dlinklist.h" - -static int message_list_db_init(struct ctdb_context *ctdb) -{ - ctdb->message_list_indexdb = tdb_open("messagedb", 8192, - TDB_INTERNAL| - TDB_INCOMPATIBLE_HASH| - TDB_DISALLOW_NESTING, - O_RDWR|O_CREAT, 0); - if (ctdb->message_list_indexdb == NULL) { - DEBUG(DEBUG_ERR, ("Failed to create message list indexdb\n")); - return -1; - } - - return 0; -} - -static int message_list_db_add(struct ctdb_context *ctdb, uint64_t srvid, - struct ctdb_message_list_header *h) -{ - int ret; - TDB_DATA key, data; - - if (ctdb->message_list_indexdb == NULL) { - ret = message_list_db_init(ctdb); - if (ret < 0) { - return -1; - } - } - - key.dptr = (uint8_t *)&srvid; - key.dsize = sizeof(uint64_t); - - data.dptr = (uint8_t *)&h; - data.dsize = sizeof(struct ctdb_message_list_header *); - - ret = tdb_store(ctdb->message_list_indexdb, key, data, TDB_INSERT); - if (ret < 0) { - DEBUG(DEBUG_ERR, ("Failed to add message list handler (%s)\n", - tdb_errorstr(ctdb->message_list_indexdb))); - return -1; - } - - return 0; -} - -static int message_list_db_delete(struct ctdb_context *ctdb, uint64_t srvid) -{ - int ret; - TDB_DATA key; - - if (ctdb->message_list_indexdb == NULL) { - return -1; - } - - key.dptr = (uint8_t *)&srvid; - key.dsize = sizeof(uint64_t); - - ret = tdb_delete(ctdb->message_list_indexdb, key); - if (ret < 0) { - DEBUG(DEBUG_ERR, ("Failed to delete message list handler (%s)\n", - tdb_errorstr(ctdb->message_list_indexdb))); - return -1; - } - - return 0; -} - -static int message_list_db_fetch_parser(TDB_DATA key, TDB_DATA data, - void *private_data) -{ - struct ctdb_message_list_header **h = - (struct ctdb_message_list_header **)private_data; - - if (data.dsize != sizeof(struct ctdb_message_list_header *)) { - return -1; - } - - *h = *(struct ctdb_message_list_header **)data.dptr; - return 0; -} - -static int message_list_db_fetch(struct ctdb_context *ctdb, uint64_t srvid, - struct ctdb_message_list_header **h) -{ - TDB_DATA key; - - if (ctdb->message_list_indexdb == NULL) { - return -1; - } - - key.dptr = (uint8_t *)&srvid; - key.dsize = sizeof(uint64_t); - - return tdb_parse_record(ctdb->message_list_indexdb, key, - message_list_db_fetch_parser, h); -} - -/* - this dispatches the messages to the registered ctdb message handler -*/ -int ctdb_dispatch_message(struct ctdb_context *ctdb, uint64_t srvid, TDB_DATA data) -{ - struct ctdb_message_list_header *h; - struct ctdb_message_list *m; - uint64_t srvid_all = CTDB_SRVID_ALL; - int ret; - - ret = message_list_db_fetch(ctdb, srvid, &h); - if (ret == 0) { - for (m=h->m; m; m=m->next) { - m->message_handler(ctdb, srvid, data, m->message_private); - } - } - - ret = message_list_db_fetch(ctdb, srvid_all, &h); - if (ret == 0) { - for(m=h->m; m; m=m->next) { - m->message_handler(ctdb, srvid, data, m->message_private); - } - } - - return 0; -} - -/* - called when a CTDB_REQ_MESSAGE packet comes in -*/ -void ctdb_request_message(struct ctdb_context *ctdb, struct ctdb_req_header *hdr) -{ - struct ctdb_req_message *c = (struct ctdb_req_message *)hdr; - TDB_DATA data; - - data.dsize = c->datalen; - data.dptr = talloc_memdup(c, &c->data[0], c->datalen); - - ctdb_dispatch_message(ctdb, c->srvid, data); -} - -/* - * When header is freed, remove all the srvid handlers - */ -static int message_header_destructor(struct ctdb_message_list_header *h) -{ - struct ctdb_message_list *m; - - while (h->m != NULL) { - m = h->m; - DLIST_REMOVE(h->m, m); - TALLOC_FREE(m); - } - - message_list_db_delete(h->ctdb, h->srvid); - DLIST_REMOVE(h->ctdb->message_list_header, h); - - return 0; -} - -/* - when a client goes away, we need to remove its srvid handler from the list - */ -static int message_handler_destructor(struct ctdb_message_list *m) -{ - struct ctdb_message_list_header *h = m->h; - - DLIST_REMOVE(h->m, m); - if (h->m == NULL) { - talloc_free(h); - } - return 0; -} - -/* - setup handler for receipt of ctdb messages from ctdb_send_message() -*/ -int ctdb_register_message_handler(struct ctdb_context *ctdb, - TALLOC_CTX *mem_ctx, - uint64_t srvid, - ctdb_msg_fn_t handler, - void *private_data) -{ - struct ctdb_message_list_header *h; - struct ctdb_message_list *m; - int ret; - - m = talloc_zero(mem_ctx, struct ctdb_message_list); - CTDB_NO_MEMORY(ctdb, m); - - m->message_handler = handler; - m->message_private = private_data; - - ret = message_list_db_fetch(ctdb, srvid, &h); - if (ret != 0) { - /* srvid not registered yet */ - h = talloc_zero(ctdb, struct ctdb_message_list_header); - CTDB_NO_MEMORY(ctdb, h); - - h->ctdb = ctdb; - h->srvid = srvid; - - ret = message_list_db_add(ctdb, srvid, h); - if (ret < 0) { - talloc_free(m); - talloc_free(h); - return -1; - } - - DLIST_ADD(ctdb->message_list_header, h); - talloc_set_destructor(h, message_header_destructor); - } - - m->h = h; - DLIST_ADD(h->m, m); - talloc_set_destructor(m, message_handler_destructor); - return 0; -} - - -/* - setup handler for receipt of ctdb messages from ctdb_send_message() -*/ -int ctdb_deregister_message_handler(struct ctdb_context *ctdb, uint64_t srvid, void *private_data) -{ - struct ctdb_message_list_header *h; - struct ctdb_message_list *m; - int ret; - - ret = message_list_db_fetch(ctdb, srvid, &h); - if (ret != 0) { - return -1; - } - - for (m=h->m; m; m=m->next) { - if (m->message_private == private_data) { - talloc_free(m); - return 0; - } - } - - return -1; -} - - -/* - * check if the given srvid exists - */ -bool ctdb_check_message_handler(struct ctdb_context *ctdb, uint64_t srvid) -{ - struct ctdb_message_list_header *h; - int ret; - - ret = message_list_db_fetch(ctdb, srvid, &h); - if (ret != 0 || h->m == NULL) { - return false; - } - - return true; -} |