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-rw-r--r--ctdb/protocol/protocol_message.c476
1 files changed, 476 insertions, 0 deletions
diff --git a/ctdb/protocol/protocol_message.c b/ctdb/protocol/protocol_message.c
new file mode 100644
index 0000000..e2202bb
--- /dev/null
+++ b/ctdb/protocol/protocol_message.c
@@ -0,0 +1,476 @@
+/*
+ CTDB protocol marshalling
+
+ Copyright (C) Amitay Isaacs 2015
+
+ 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/>.
+*/
+
+#include "replace.h"
+#include "system/network.h"
+
+#include <talloc.h>
+#include <tdb.h>
+
+#include "protocol.h"
+#include "protocol_api.h"
+#include "protocol_private.h"
+
+
+static size_t ctdb_message_data_len(union ctdb_message_data *mdata,
+ uint64_t srvid)
+{
+ size_t len = 0;
+
+ switch (srvid) {
+ case CTDB_SRVID_BANNING:
+ len = ctdb_uint32_len(&mdata->pnn);
+ break;
+
+ case CTDB_SRVID_ELECTION:
+ len = ctdb_election_message_len(mdata->election);
+ break;
+
+ case CTDB_SRVID_LEADER:
+ len = ctdb_uint32_len(&mdata->pnn);
+ break;
+
+ case CTDB_SRVID_RECONFIGURE:
+ break;
+
+ case CTDB_SRVID_RELEASE_IP:
+ len = ctdb_string_len(&mdata->ipaddr);
+ break;
+
+ case CTDB_SRVID_TAKE_IP:
+ len = ctdb_string_len(&mdata->ipaddr);
+ break;
+
+ case CTDB_SRVID_SET_NODE_FLAGS:
+ len = ctdb_node_flag_change_len(mdata->flag_change);
+ break;
+
+ case CTDB_SRVID_RECD_UPDATE_IP:
+ len = ctdb_public_ip_len(mdata->pubip);
+ break;
+
+ case CTDB_SRVID_VACUUM_FETCH:
+ len = ctdb_rec_buffer_len(mdata->recbuf);
+ break;
+
+ case CTDB_SRVID_DETACH_DATABASE:
+ len = ctdb_uint32_len(&mdata->db_id);
+ break;
+
+ case CTDB_SRVID_MEM_DUMP:
+ len = ctdb_srvid_message_len(mdata->msg);
+ break;
+
+ case CTDB_SRVID_GETLOG:
+ break;
+
+ case CTDB_SRVID_CLEARLOG:
+ break;
+
+ case CTDB_SRVID_PUSH_NODE_FLAGS:
+ len = ctdb_node_flag_change_len(mdata->flag_change);
+ break;
+
+ case CTDB_SRVID_RELOAD_NODES:
+ break;
+
+ case CTDB_SRVID_TAKEOVER_RUN:
+ len = ctdb_srvid_message_len(mdata->msg);
+ break;
+
+ case CTDB_SRVID_REBALANCE_NODE:
+ len = ctdb_uint32_len(&mdata->pnn);
+ break;
+
+ case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
+ len = ctdb_disable_message_len(mdata->disable);
+ break;
+
+ case CTDB_SRVID_DISABLE_RECOVERIES:
+ len = ctdb_disable_message_len(mdata->disable);
+ break;
+
+ case CTDB_SRVID_DISABLE_IP_CHECK:
+ len = ctdb_uint32_len(&mdata->timeout);
+ break;
+
+ default:
+ len = ctdb_tdb_data_len(&mdata->data);
+ break;
+ }
+
+ return len;
+}
+
+static void ctdb_message_data_push(union ctdb_message_data *mdata,
+ uint64_t srvid, uint8_t *buf,
+ size_t *npush)
+{
+ size_t np = 0;
+
+ switch (srvid) {
+ case CTDB_SRVID_BANNING:
+ ctdb_uint32_push(&mdata->pnn, buf, &np);
+ break;
+
+ case CTDB_SRVID_ELECTION:
+ ctdb_election_message_push(mdata->election, buf, &np);
+ break;
+
+ case CTDB_SRVID_LEADER:
+ ctdb_uint32_push(&mdata->pnn, buf, &np);
+ break;
+
+ case CTDB_SRVID_RECONFIGURE:
+ break;
+
+ case CTDB_SRVID_RELEASE_IP:
+ ctdb_string_push(&mdata->ipaddr, buf, &np);
+ break;
+
+ case CTDB_SRVID_TAKE_IP:
+ ctdb_string_push(&mdata->ipaddr, buf, &np);
+ break;
+
+ case CTDB_SRVID_SET_NODE_FLAGS:
+ ctdb_node_flag_change_push(mdata->flag_change, buf, &np);
+ break;
+
+ case CTDB_SRVID_RECD_UPDATE_IP:
+ ctdb_public_ip_push(mdata->pubip, buf, &np);
+ break;
+
+ case CTDB_SRVID_VACUUM_FETCH:
+ ctdb_rec_buffer_push(mdata->recbuf, buf, &np);
+ break;
+
+ case CTDB_SRVID_DETACH_DATABASE:
+ ctdb_uint32_push(&mdata->db_id, buf, &np);
+ break;
+
+ case CTDB_SRVID_MEM_DUMP:
+ ctdb_srvid_message_push(mdata->msg, buf, &np);
+ break;
+
+ case CTDB_SRVID_GETLOG:
+ break;
+
+ case CTDB_SRVID_CLEARLOG:
+ break;
+
+ case CTDB_SRVID_PUSH_NODE_FLAGS:
+ ctdb_node_flag_change_push(mdata->flag_change, buf, &np);
+ break;
+
+ case CTDB_SRVID_RELOAD_NODES:
+ break;
+
+ case CTDB_SRVID_TAKEOVER_RUN:
+ ctdb_srvid_message_push(mdata->msg, buf, &np);
+ break;
+
+ case CTDB_SRVID_REBALANCE_NODE:
+ ctdb_uint32_push(&mdata->pnn, buf, &np);
+ break;
+
+ case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
+ ctdb_disable_message_push(mdata->disable, buf, &np);
+ break;
+
+ case CTDB_SRVID_DISABLE_RECOVERIES:
+ ctdb_disable_message_push(mdata->disable, buf, &np);
+ break;
+
+ case CTDB_SRVID_DISABLE_IP_CHECK:
+ ctdb_uint32_push(&mdata->timeout, buf, &np);
+ break;
+
+ default:
+ ctdb_tdb_data_push(&mdata->data, buf, &np);
+ break;
+ }
+
+ *npush = np;
+}
+
+static int ctdb_message_data_pull(uint8_t *buf, size_t buflen,
+ uint64_t srvid, TALLOC_CTX *mem_ctx,
+ union ctdb_message_data *mdata,
+ size_t *npull)
+{
+ int ret = 0;
+ size_t np = 0;
+
+ switch (srvid) {
+ case CTDB_SRVID_BANNING:
+ ret = ctdb_uint32_pull(buf, buflen, &mdata->pnn, &np);
+ break;
+
+ case CTDB_SRVID_ELECTION:
+ ret = ctdb_election_message_pull(buf, buflen, mem_ctx,
+ &mdata->election, &np);
+ break;
+
+ case CTDB_SRVID_LEADER:
+ ret = ctdb_uint32_pull(buf, buflen, &mdata->pnn, &np);
+ break;
+
+ case CTDB_SRVID_RECONFIGURE:
+ break;
+
+ case CTDB_SRVID_RELEASE_IP:
+ ret = ctdb_string_pull(buf, buflen, mem_ctx, &mdata->ipaddr,
+ &np);
+ break;
+
+ case CTDB_SRVID_TAKE_IP:
+ ret = ctdb_string_pull(buf, buflen, mem_ctx, &mdata->ipaddr,
+ &np);
+ break;
+
+ case CTDB_SRVID_SET_NODE_FLAGS:
+ ret = ctdb_node_flag_change_pull(buf, buflen, mem_ctx,
+ &mdata->flag_change, &np);
+ break;
+
+ case CTDB_SRVID_RECD_UPDATE_IP:
+ ret = ctdb_public_ip_pull(buf, buflen, mem_ctx,
+ &mdata->pubip, &np);
+ break;
+
+ case CTDB_SRVID_VACUUM_FETCH:
+ ret = ctdb_rec_buffer_pull(buf, buflen, mem_ctx,
+ &mdata->recbuf, &np);
+ break;
+
+ case CTDB_SRVID_DETACH_DATABASE:
+ ret = ctdb_uint32_pull(buf, buflen, &mdata->db_id, &np);
+ break;
+
+ case CTDB_SRVID_MEM_DUMP:
+ ret = ctdb_srvid_message_pull(buf, buflen, mem_ctx,
+ &mdata->msg, &np);
+ break;
+
+ case CTDB_SRVID_GETLOG:
+ break;
+
+ case CTDB_SRVID_CLEARLOG:
+ break;
+
+ case CTDB_SRVID_PUSH_NODE_FLAGS:
+ ret = ctdb_node_flag_change_pull(buf, buflen, mem_ctx,
+ &mdata->flag_change, &np);
+ break;
+
+ case CTDB_SRVID_RELOAD_NODES:
+ break;
+
+ case CTDB_SRVID_TAKEOVER_RUN:
+ ret = ctdb_srvid_message_pull(buf, buflen, mem_ctx,
+ &mdata->msg, &np);
+ break;
+
+ case CTDB_SRVID_REBALANCE_NODE:
+ ret = ctdb_uint32_pull(buf, buflen, &mdata->pnn, &np);
+ break;
+
+ case CTDB_SRVID_DISABLE_TAKEOVER_RUNS:
+ ret = ctdb_disable_message_pull(buf, buflen, mem_ctx,
+ &mdata->disable, &np);
+ break;
+
+ case CTDB_SRVID_DISABLE_RECOVERIES:
+ ret = ctdb_disable_message_pull(buf, buflen, mem_ctx,
+ &mdata->disable, &np);
+ break;
+
+ case CTDB_SRVID_DISABLE_IP_CHECK:
+ ret = ctdb_uint32_pull(buf, buflen, &mdata->timeout, &np);
+ break;
+
+ default:
+ ret = ctdb_tdb_data_pull(buf, buflen, mem_ctx, &mdata->data,
+ &np);
+ break;
+ }
+
+ if (ret != 0) {
+ return ret;
+ }
+
+ *npull = np;
+ return 0;
+}
+
+size_t ctdb_req_message_len(struct ctdb_req_header *h,
+ struct ctdb_req_message *c)
+{
+ uint32_t u32 = ctdb_message_data_len(&c->data, c->srvid);
+
+ return ctdb_req_header_len(h) +
+ ctdb_uint64_len(&c->srvid) +
+ ctdb_uint32_len(&u32) + u32;
+}
+
+int ctdb_req_message_push(struct ctdb_req_header *h,
+ struct ctdb_req_message *c,
+ uint8_t *buf, size_t *buflen)
+{
+ size_t offset = 0, np;
+ size_t length;
+ uint32_t u32;
+
+ length = ctdb_req_message_len(h, c);
+ if (*buflen < length) {
+ *buflen = length;
+ return EMSGSIZE;
+ }
+
+ h->length = *buflen;
+ ctdb_req_header_push(h, buf+offset, &np);
+ offset += np;
+
+ ctdb_uint64_push(&c->srvid, buf+offset, &np);
+ offset += np;
+
+ u32 = ctdb_message_data_len(&c->data, c->srvid);
+ ctdb_uint32_push(&u32, buf+offset, &np);
+ offset += np;
+
+ ctdb_message_data_push(&c->data, c->srvid, buf+offset, &np);
+ offset += np;
+
+ return 0;
+}
+
+int ctdb_req_message_pull(uint8_t *buf, size_t buflen,
+ struct ctdb_req_header *h,
+ TALLOC_CTX *mem_ctx,
+ struct ctdb_req_message *c)
+{
+ struct ctdb_req_header header;
+ size_t offset = 0, np;
+ uint32_t u32;
+ int ret;
+
+ ret = ctdb_req_header_pull(buf+offset, buflen-offset, &header, &np);
+ if (ret != 0) {
+ return ret;
+ }
+ offset += np;
+
+ if (h != NULL) {
+ *h = header;
+ }
+
+ ret = ctdb_uint64_pull(buf+offset, buflen-offset, &c->srvid, &np);
+ if (ret != 0) {
+ return ret;
+ }
+ offset += np;
+
+ ret = ctdb_uint32_pull(buf+offset, buflen-offset, &u32, &np);
+ if (ret != 0) {
+ return ret;
+ }
+ offset += np;
+
+ if (buflen-offset < u32) {
+ return EMSGSIZE;
+ }
+
+ ret = ctdb_message_data_pull(buf+offset, u32, c->srvid,
+ mem_ctx, &c->data, &np);
+ if (ret != 0) {
+ return ret;
+ }
+ offset += np;
+
+ return ret;
+}
+
+size_t ctdb_req_message_data_len(struct ctdb_req_header *h,
+ struct ctdb_req_message_data *c)
+{
+ return ctdb_req_header_len(h) +
+ ctdb_uint64_len(&c->srvid) +
+ ctdb_tdb_datan_len(&c->data);
+}
+
+int ctdb_req_message_data_push(struct ctdb_req_header *h,
+ struct ctdb_req_message_data *c,
+ uint8_t *buf, size_t *buflen)
+{
+ size_t offset = 0, np;
+ size_t length;
+
+ length = ctdb_req_message_data_len(h, c);
+ if (*buflen < length) {
+ *buflen = length;
+ return EMSGSIZE;
+ }
+
+ h->length = *buflen;
+ ctdb_req_header_push(h, buf+offset, &np);
+ offset += np;
+
+ ctdb_uint64_push(&c->srvid, buf+offset, &np);
+ offset += np;
+
+ ctdb_tdb_datan_push(&c->data, buf+offset, &np);
+ offset += np;
+
+ return 0;
+}
+
+int ctdb_req_message_data_pull(uint8_t *buf, size_t buflen,
+ struct ctdb_req_header *h,
+ TALLOC_CTX *mem_ctx,
+ struct ctdb_req_message_data *c)
+{
+ struct ctdb_req_header header;
+ size_t offset = 0, np;
+ int ret;
+
+ ret = ctdb_req_header_pull(buf+offset, buflen-offset, &header, &np);
+ if (ret != 0) {
+ return ret;
+ }
+ offset += np;
+
+ if (h != NULL) {
+ *h = header;
+ }
+
+ ret = ctdb_uint64_pull(buf+offset, buflen-offset, &c->srvid, &np);
+ if (ret != 0) {
+ return ret;
+ }
+ offset += np;
+
+ ret = ctdb_tdb_datan_pull(buf+offset, buflen-offset,
+ mem_ctx, &c->data, &np);
+ if (ret != 0) {
+ return ret;
+ }
+ offset += np;
+
+ return 0;
+}
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