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samba-mirror/ctdb/protocol/protocol_message.c
Amitay Isaacs 3b86c24183 ctdb-protocol: Fix marshalling for tdb_data
Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>
2017-08-30 14:59:22 +02:00

429 lines
9.3 KiB
C

/*
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"
struct ctdb_req_message_wire {
struct ctdb_req_header hdr;
uint64_t srvid;
uint32_t datalen;
uint8_t data[1];
};
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_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_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 np;
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);
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);
break;
case CTDB_SRVID_RECD_UPDATE_IP:
ctdb_public_ip_push(mdata->pubip, buf);
break;
case CTDB_SRVID_VACUUM_FETCH:
ctdb_rec_buffer_push(mdata->recbuf, buf);
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);
break;
case CTDB_SRVID_PUSH_NODE_FLAGS:
ctdb_node_flag_change_push(mdata->flag_change, buf);
break;
case CTDB_SRVID_RELOAD_NODES:
break;
case CTDB_SRVID_TAKEOVER_RUN:
ctdb_srvid_message_push(mdata->msg, buf);
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);
break;
case CTDB_SRVID_DISABLE_RECOVERIES:
ctdb_disable_message_push(mdata->disable, buf);
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;
}
}
static int ctdb_message_data_pull(uint8_t *buf, size_t buflen,
uint64_t srvid, TALLOC_CTX *mem_ctx,
union ctdb_message_data *mdata)
{
int ret = 0;
size_t np;
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);
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);
break;
case CTDB_SRVID_RECD_UPDATE_IP:
ret = ctdb_public_ip_pull(buf, buflen, mem_ctx,
&mdata->pubip);
break;
case CTDB_SRVID_VACUUM_FETCH:
ret = ctdb_rec_buffer_pull(buf, buflen, mem_ctx,
&mdata->recbuf);
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);
break;
case CTDB_SRVID_PUSH_NODE_FLAGS:
ret = ctdb_node_flag_change_pull(buf, buflen, mem_ctx,
&mdata->flag_change);
break;
case CTDB_SRVID_RELOAD_NODES:
break;
case CTDB_SRVID_TAKEOVER_RUN:
ret = ctdb_srvid_message_pull(buf, buflen, mem_ctx,
&mdata->msg);
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);
break;
case CTDB_SRVID_DISABLE_RECOVERIES:
ret = ctdb_disable_message_pull(buf, buflen, mem_ctx,
&mdata->disable);
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;
}
return ret;
}
size_t ctdb_req_message_len(struct ctdb_req_header *h,
struct ctdb_req_message *c)
{
return offsetof(struct ctdb_req_message_wire, data) +
ctdb_message_data_len(&c->data, c->srvid);
}
int ctdb_req_message_push(struct ctdb_req_header *h,
struct ctdb_req_message *message,
uint8_t *buf, size_t *buflen)
{
struct ctdb_req_message_wire *wire =
(struct ctdb_req_message_wire *)buf;
size_t length;
length = ctdb_req_message_len(h, message);
if (*buflen < length) {
*buflen = length;
return EMSGSIZE;
}
h->length = *buflen;
ctdb_req_header_push(h, (uint8_t *)&wire->hdr);
wire->srvid = message->srvid;
wire->datalen = ctdb_message_data_len(&message->data, message->srvid);
ctdb_message_data_push(&message->data, message->srvid, wire->data);
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_message_wire *wire =
(struct ctdb_req_message_wire *)buf;
size_t length;
int ret;
length = offsetof(struct ctdb_req_message_wire, data);
if (buflen < length) {
return EMSGSIZE;
}
if (wire->datalen > buflen) {
return EMSGSIZE;
}
if (length + wire->datalen < length) {
return EMSGSIZE;
}
if (buflen < length + wire->datalen) {
return EMSGSIZE;
}
if (h != NULL) {
ret = ctdb_req_header_pull((uint8_t *)&wire->hdr, buflen, h);
if (ret != 0) {
return ret;
}
}
c->srvid = wire->srvid;
ret = ctdb_message_data_pull(wire->data, wire->datalen, wire->srvid,
mem_ctx, &c->data);
return ret;
}
size_t ctdb_req_message_data_len(struct ctdb_req_header *h,
struct ctdb_req_message_data *c)
{
return offsetof(struct ctdb_req_message_wire, data) +
ctdb_tdb_data_len(&c->data);
}
int ctdb_req_message_data_push(struct ctdb_req_header *h,
struct ctdb_req_message_data *message,
uint8_t *buf, size_t *buflen)
{
struct ctdb_req_message_wire *wire =
(struct ctdb_req_message_wire *)buf;
size_t length, np;
length = ctdb_req_message_data_len(h, message);
if (*buflen < length) {
*buflen = length;
return EMSGSIZE;
}
h->length = *buflen;
ctdb_req_header_push(h, (uint8_t *)&wire->hdr);
wire->srvid = message->srvid;
wire->datalen = ctdb_tdb_data_len(&message->data);
ctdb_tdb_data_push(&message->data, wire->data, &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_message_wire *wire =
(struct ctdb_req_message_wire *)buf;
size_t length, np;
int ret;
length = offsetof(struct ctdb_req_message_wire, data);
if (buflen < length) {
return EMSGSIZE;
}
if (wire->datalen > buflen) {
return EMSGSIZE;
}
if (length + wire->datalen < length) {
return EMSGSIZE;
}
if (buflen < length + wire->datalen) {
return EMSGSIZE;
}
if (h != NULL) {
ret = ctdb_req_header_pull((uint8_t *)&wire->hdr, buflen, h);
if (ret != 0) {
return ret;
}
}
c->srvid = wire->srvid;
ret = ctdb_tdb_data_pull(wire->data, wire->datalen,
mem_ctx, &c->data, &np);
if (ret != 0) {
return ret;
}
return 0;
}