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https://git.proxmox.com/git/mirror_corosync-qdevice
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fbc34f3b05
This patch adds qdevice-net part of keep active partition tie breaker functionality. It's enabled by default. When tie happens prefer partition with members of previously active (quorate) partition. This is hard-coded behavior of LMS algorithm so this setting affects only FFSplit algorithm. By default it is disabled for backwards compatibility. This solves problem with FFSplit when node A (with lowest id) is killed, node B gets vote and then node A starts up and creates single node membership and gets vote. Signed-off-by: Jan Friesse <jfriesse@redhat.com>
220 lines
9.0 KiB
C
220 lines
9.0 KiB
C
/*
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* Copyright (c) 2015-2020 Red Hat, Inc.
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*
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* All rights reserved.
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*
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* Author: Jan Friesse (jfriesse@redhat.com)
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*
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* This software licensed under BSD license, the text of which follows:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the Red Hat, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MSG_H_
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#define _MSG_H_
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#include <sys/types.h>
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#include <inttypes.h>
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#include "dynar.h"
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#include "tlv.h"
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#include "node-list.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum msg_type {
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MSG_TYPE_PREINIT = 0,
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MSG_TYPE_PREINIT_REPLY = 1,
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MSG_TYPE_STARTTLS = 2,
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MSG_TYPE_INIT = 3,
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MSG_TYPE_INIT_REPLY = 4,
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MSG_TYPE_SERVER_ERROR = 5,
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MSG_TYPE_SET_OPTION = 6,
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MSG_TYPE_SET_OPTION_REPLY = 7,
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MSG_TYPE_ECHO_REQUEST = 8,
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MSG_TYPE_ECHO_REPLY = 9,
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MSG_TYPE_NODE_LIST = 10,
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MSG_TYPE_NODE_LIST_REPLY = 11,
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MSG_TYPE_ASK_FOR_VOTE = 12,
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MSG_TYPE_ASK_FOR_VOTE_REPLY = 13,
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MSG_TYPE_VOTE_INFO = 14,
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MSG_TYPE_VOTE_INFO_REPLY = 15,
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MSG_TYPE_HEURISTICS_CHANGE = 16,
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MSG_TYPE_HEURISTICS_CHANGE_REPLY = 17,
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};
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struct msg_decoded {
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enum msg_type type;
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uint8_t seq_number_set;
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uint32_t seq_number; /* Only valid if seq_number_set != 0 */
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size_t cluster_name_len;
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/* Valid only if != NULL. Trailing \0 is added but not counted in cluster_name_len */
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char *cluster_name;
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uint8_t tls_supported_set;
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enum tlv_tls_supported tls_supported; /* Valid only if tls_supported_set != 0. */
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uint8_t tls_client_cert_required_set;
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uint8_t tls_client_cert_required; /* Valid only if tls_client_cert_required_set != 0 */
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size_t no_supported_messages;
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enum msg_type *supported_messages; /* Valid only if != NULL */
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size_t no_supported_options;
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enum tlv_opt_type *supported_options; /* Valid only if != NULL */
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uint8_t reply_error_code_set;
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enum tlv_reply_error_code reply_error_code; /* Valid only if reply_error_code_set != 0 */
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uint8_t server_maximum_request_size_set;
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/* Valid only if server_maximum_request_size_set != 0 */
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size_t server_maximum_request_size;
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uint8_t server_maximum_reply_size_set;
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size_t server_maximum_reply_size; /* Valid only if server_maximum_reply_size_set != 0 */
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uint8_t node_id_set;
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uint32_t node_id;
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size_t no_supported_decision_algorithms;
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/* Valid only if != NULL */
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enum tlv_decision_algorithm_type *supported_decision_algorithms;
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uint8_t decision_algorithm_set;
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/* Valid only if decision_algorithm_set != 0 */
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enum tlv_decision_algorithm_type decision_algorithm;
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uint8_t heartbeat_interval_set;
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uint32_t heartbeat_interval; /* Valid only if heartbeat_interval_set != 0 */
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uint8_t ring_id_set;
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struct tlv_ring_id ring_id; /* Valid only if ring_id_set != 0 */
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uint8_t config_version_set;
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uint64_t config_version; /* Valid only if config_version_set != 0 */
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uint32_t data_center_id; /* Valid only if != 0 */
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enum tlv_node_state node_state; /* Valid only if != TLV_NODE_STATE_NOT_SET */
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struct node_list nodes; /* Valid only if node_list_is_empty(nodes) != 0 */
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uint8_t node_list_type_set;
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enum tlv_node_list_type node_list_type; /* Valid only if node_list_type_set != 0 */
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uint8_t vote_set;
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enum tlv_vote vote; /* Valid only if vote_set != 0 */
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uint8_t quorate_set;
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enum tlv_quorate quorate; /* Valid only if quorate_set != 0 */
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uint8_t tie_breaker_set;
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struct tlv_tie_breaker tie_breaker;
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enum tlv_heuristics heuristics; /* Always valid but can be TLV_HEURISTICS_UNDEFINED */
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enum tlv_keep_active_partition_tie_breaker keep_active_partition_tie_breaker;
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uint8_t keep_active_partition_tie_breaker_set;
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};
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extern size_t msg_create_preinit(struct dynar *msg, const char *cluster_name,
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int add_msg_seq_number, uint32_t msg_seq_number);
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extern size_t msg_create_preinit_reply(struct dynar *msg, int add_msg_seq_number,
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uint32_t msg_seq_number, enum tlv_tls_supported tls_supported, int tls_client_cert_required);
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extern size_t msg_create_starttls(struct dynar *msg, int add_msg_seq_number,
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uint32_t msg_seq_number);
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extern size_t msg_create_init(struct dynar *msg, int add_msg_seq_number,
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uint32_t msg_seq_number, enum tlv_decision_algorithm_type decision_algorithm,
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const enum msg_type *supported_msgs, size_t no_supported_msgs,
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const enum tlv_opt_type *supported_opts, size_t no_supported_opts, uint32_t node_id,
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uint32_t heartbeat_interval, const struct tlv_tie_breaker *tie_breaker,
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const struct tlv_ring_id *ring_id);
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extern size_t msg_create_server_error(struct dynar *msg, int add_msg_seq_number,
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uint32_t msg_seq_number, enum tlv_reply_error_code reply_error_code);
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extern size_t msg_create_init_reply(struct dynar *msg, int add_msg_seq_number,
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uint32_t msg_seq_number, enum tlv_reply_error_code reply_error_code,
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const enum msg_type *supported_msgs, size_t no_supported_msgs,
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const enum tlv_opt_type *supported_opts, size_t no_supported_opts,
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size_t server_maximum_request_size, size_t server_maximum_reply_size,
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const enum tlv_decision_algorithm_type *supported_decision_algorithms,
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size_t no_supported_decision_algorithms);
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extern size_t msg_create_set_option(struct dynar *msg,
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int add_msg_seq_number, uint32_t msg_seq_number,
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int add_heartbeat_interval, uint32_t heartbeat_interval,
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int add_keep_active_partition_tie_breaker,
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enum tlv_keep_active_partition_tie_breaker keep_active_partiton_tie_breaker);
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extern size_t msg_create_set_option_reply(struct dynar *msg,
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int add_msg_seq_number, uint32_t msg_seq_number,
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int add_heartbeat_interval, uint32_t heartbeat_interval,
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int add_keep_active_partition_tie_breaker,
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enum tlv_keep_active_partition_tie_breaker keep_active_partiton_tie_breaker);
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extern size_t msg_create_echo_request(struct dynar *msg, int add_msg_seq_number,
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uint32_t msg_seq_number);
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extern size_t msg_create_echo_reply(struct dynar *msg,
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const struct dynar *echo_request_msg);
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extern size_t msg_create_node_list(struct dynar *msg,
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uint32_t msg_seq_number, enum tlv_node_list_type node_list_type,
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int add_ring_id, const struct tlv_ring_id *ring_id,
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int add_config_version, uint64_t config_version,
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int add_quorate, enum tlv_quorate quorate,
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int add_heuristics, enum tlv_heuristics heuristics,
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const struct node_list *nodes);
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extern size_t msg_create_node_list_reply(struct dynar *msg, uint32_t msg_seq_number,
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enum tlv_node_list_type node_list_type, const struct tlv_ring_id *ring_id,
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enum tlv_vote vote);
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extern size_t msg_create_ask_for_vote(struct dynar *msg, uint32_t msg_seq_number);
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extern size_t msg_create_ask_for_vote_reply(struct dynar *msg, uint32_t msg_seq_number,
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const struct tlv_ring_id *ring_id, enum tlv_vote vote);
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extern size_t msg_create_vote_info(struct dynar *msg, uint32_t msg_seq_number,
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const struct tlv_ring_id *ring_id, enum tlv_vote vote);
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extern size_t msg_create_vote_info_reply(struct dynar *msg, uint32_t msg_seq_number);
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extern size_t msg_create_heuristics_change(struct dynar *msg, uint32_t msg_seq_number,
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enum tlv_heuristics heuristics);
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extern size_t msg_create_heuristics_change_reply(struct dynar *msg,
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uint32_t msg_seq_number, const struct tlv_ring_id *ring_id, enum tlv_heuristics heuristics,
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enum tlv_vote vote);
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extern size_t msg_get_header_length(void);
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extern uint32_t msg_get_len(const struct dynar *msg);
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extern enum msg_type msg_get_type(const struct dynar *msg);
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extern int msg_is_valid_msg_type(const struct dynar *msg);
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extern void msg_decoded_init(struct msg_decoded *decoded_msg);
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extern void msg_decoded_destroy(struct msg_decoded *decoded_msg);
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extern int msg_decode(const struct dynar *msg, struct msg_decoded *decoded_msg);
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extern void msg_get_supported_messages(enum msg_type **supported_messages,
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size_t *no_supported_messages);
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extern const char * msg_type_to_str(enum msg_type type);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _MSG_H_ */
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