mirror of
https://github.com/MariaDB/server.git
synced 2025-08-30 11:22:14 +03:00
When high priority replication slave applier encounters lock conflict in innodb, it will force the conflicting lock holder transaction (victim) to rollback. This is a must in multi-master sychronous replication model to avoid cluster lock-up. This high priority victim abort (aka "brute force" (BF) abort), is started from innodb lock manager while holding the victim's transaction's (trx) mutex. Depending on the execution state of the victim transaction, it may happen that the BF abort will call for THD::awake() to wake up the victim transaction for the rollback. Now, if BF abort requires THD::awake() to be called, then the applier thread executed locking protocol of: victim trx mutex -> victim THD::LOCK_thd_data If, at the same time another DBMS super user issues KILL command to abort the same victim, it will execute locking protocol of: victim THD::LOCK_thd_data -> victim trx mutex. These two locking protocol acquire mutexes in opposite order, hence unresolvable mutex locking deadlock may occur. The fix in this commit adds THD::wsrep_aborter flag to synchronize who can kill the victim This flag is set both when BF is called for from innodb and by KILL command. Either path of victim killing will bail out if victim's wsrep_killed is already set to avoid mutex conflicts with the other aborter execution. THD::wsrep_aborter records the aborter THD's ID. This is needed to preserve the right to kill the victim from different locations for the same aborter thread. It is also good error logging, to see who is reponsible for the abort. A new test case was added in galera.galera_bf_kill_debug.test for scenario where wsrep applier thread and manual KILL command try to kill same idle victim
258 lines
7.0 KiB
Plaintext
258 lines
7.0 KiB
Plaintext
/* Copyright (c) 2009, 2010, Oracle and/or its affiliates.
|
|
Copyright (c) 2012, 2019, MariaDB Corporation.
|
|
|
|
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; version 2 of the License.
|
|
|
|
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, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
|
|
|
|
/* support for Services */
|
|
#include <service_versions.h>
|
|
#include <mysql/service_wsrep.h>
|
|
#include <mysql/service_thd_mdl.h>
|
|
|
|
struct st_service_ref {
|
|
const char *name;
|
|
uint version;
|
|
void *service;
|
|
};
|
|
|
|
static struct my_snprintf_service_st my_snprintf_handler = {
|
|
my_snprintf,
|
|
my_vsnprintf
|
|
};
|
|
|
|
static struct thd_alloc_service_st thd_alloc_handler= {
|
|
thd_alloc,
|
|
thd_calloc,
|
|
thd_strdup,
|
|
thd_strmake,
|
|
thd_memdup,
|
|
thd_make_lex_string
|
|
};
|
|
|
|
static struct thd_wait_service_st thd_wait_handler= {
|
|
thd_wait_begin,
|
|
thd_wait_end
|
|
};
|
|
|
|
static struct progress_report_service_st progress_report_handler= {
|
|
thd_progress_init,
|
|
thd_progress_report,
|
|
thd_progress_next_stage,
|
|
thd_progress_end,
|
|
set_thd_proc_info
|
|
};
|
|
|
|
static struct kill_statement_service_st thd_kill_statement_handler= {
|
|
thd_kill_level
|
|
};
|
|
|
|
static struct thd_timezone_service_st thd_timezone_handler= {
|
|
thd_TIME_to_gmt_sec,
|
|
thd_gmt_sec_to_TIME
|
|
};
|
|
|
|
static struct my_sha2_service_st my_sha2_handler = {
|
|
my_sha224,
|
|
my_sha224_multi,
|
|
my_sha224_context_size,
|
|
my_sha224_init,
|
|
my_sha224_input,
|
|
my_sha224_result,
|
|
my_sha256,
|
|
my_sha256_multi,
|
|
my_sha256_context_size,
|
|
my_sha256_init,
|
|
my_sha256_input,
|
|
my_sha256_result,
|
|
my_sha384,
|
|
my_sha384_multi,
|
|
my_sha384_context_size,
|
|
my_sha384_init,
|
|
my_sha384_input,
|
|
my_sha384_result,
|
|
my_sha512,
|
|
my_sha512_multi,
|
|
my_sha512_context_size,
|
|
my_sha512_init,
|
|
my_sha512_input,
|
|
my_sha512_result,
|
|
};
|
|
|
|
static struct my_sha1_service_st my_sha1_handler = {
|
|
my_sha1,
|
|
my_sha1_multi,
|
|
my_sha1_context_size,
|
|
my_sha1_init,
|
|
my_sha1_input,
|
|
my_sha1_result
|
|
};
|
|
|
|
static struct my_md5_service_st my_md5_handler = {
|
|
my_md5,
|
|
my_md5_multi,
|
|
my_md5_context_size,
|
|
my_md5_init,
|
|
my_md5_input,
|
|
my_md5_result
|
|
};
|
|
|
|
static struct logger_service_st logger_service_handler= {
|
|
logger_init_mutexes,
|
|
logger_open,
|
|
logger_close,
|
|
logger_vprintf,
|
|
logger_printf,
|
|
logger_write,
|
|
logger_rotate
|
|
};
|
|
|
|
static struct thd_autoinc_service_st thd_autoinc_handler= {
|
|
thd_get_autoinc
|
|
};
|
|
|
|
static struct thd_rnd_service_st thd_rnd_handler= {
|
|
thd_rnd,
|
|
thd_create_random_password
|
|
};
|
|
|
|
static struct base64_service_st base64_handler= {
|
|
my_base64_needed_encoded_length,
|
|
my_base64_encode_max_arg_length,
|
|
my_base64_needed_decoded_length,
|
|
my_base64_decode_max_arg_length,
|
|
my_base64_encode,
|
|
my_base64_decode
|
|
};
|
|
|
|
static struct thd_error_context_service_st thd_error_context_handler= {
|
|
thd_get_error_message,
|
|
thd_get_error_number,
|
|
thd_get_error_row,
|
|
thd_inc_error_row,
|
|
thd_get_error_context_description
|
|
};
|
|
|
|
static struct wsrep_service_st wsrep_handler = {
|
|
get_wsrep_recovery,
|
|
wsrep_consistency_check,
|
|
wsrep_is_wsrep_xid,
|
|
wsrep_xid_seqno,
|
|
wsrep_xid_uuid,
|
|
wsrep_on,
|
|
wsrep_prepare_key_for_innodb,
|
|
wsrep_thd_LOCK,
|
|
wsrep_thd_UNLOCK,
|
|
wsrep_thd_query,
|
|
wsrep_thd_retry_counter,
|
|
wsrep_thd_ignore_table,
|
|
wsrep_thd_trx_seqno,
|
|
wsrep_thd_auto_increment_variables,
|
|
wsrep_thd_is_aborting,
|
|
wsrep_set_data_home_dir,
|
|
wsrep_thd_is_BF,
|
|
wsrep_thd_is_local,
|
|
wsrep_thd_self_abort,
|
|
wsrep_thd_append_key,
|
|
wsrep_thd_client_state_str,
|
|
wsrep_thd_client_mode_str,
|
|
wsrep_thd_transaction_state_str,
|
|
wsrep_thd_transaction_id,
|
|
wsrep_thd_bf_abort,
|
|
wsrep_thd_order_before,
|
|
wsrep_handle_SR_rollback,
|
|
wsrep_thd_skip_locking,
|
|
wsrep_get_sr_table_name,
|
|
wsrep_get_debug,
|
|
wsrep_commit_ordered,
|
|
wsrep_thd_is_applying,
|
|
wsrep_OSU_method_get,
|
|
wsrep_thd_has_ignored_error,
|
|
wsrep_thd_set_ignored_error,
|
|
wsrep_thd_set_wsrep_aborter
|
|
};
|
|
|
|
static struct thd_specifics_service_st thd_specifics_handler=
|
|
{
|
|
thd_key_create,
|
|
thd_key_delete,
|
|
thd_getspecific,
|
|
thd_setspecific
|
|
};
|
|
|
|
static struct encryption_scheme_service_st encryption_scheme_handler=
|
|
{
|
|
encryption_scheme_encrypt,
|
|
encryption_scheme_decrypt
|
|
};
|
|
|
|
static struct my_crypt_service_st crypt_handler=
|
|
{
|
|
my_aes_crypt_init,
|
|
my_aes_crypt_update,
|
|
my_aes_crypt_finish,
|
|
my_aes_crypt,
|
|
my_aes_get_size,
|
|
my_aes_ctx_size,
|
|
my_random_bytes
|
|
};
|
|
|
|
static struct my_print_error_service_st my_print_error_handler=
|
|
{
|
|
my_error,
|
|
my_printf_error,
|
|
my_printv_error
|
|
};
|
|
|
|
struct json_service_st json_handler=
|
|
{
|
|
json_type,
|
|
json_get_array_item,
|
|
json_get_object_key,
|
|
json_get_object_nkey,
|
|
json_escape_string,
|
|
json_unescape_json
|
|
};
|
|
|
|
static struct thd_mdl_service_st thd_mdl_handler=
|
|
{
|
|
thd_mdl_context
|
|
};
|
|
|
|
static struct st_service_ref list_of_services[]=
|
|
{
|
|
{ "base64_service", VERSION_base64, &base64_handler },
|
|
{ "debug_sync_service", VERSION_debug_sync, 0 }, // updated in plugin_init()
|
|
{ "encryption_scheme_service", VERSION_encryption_scheme, &encryption_scheme_handler },
|
|
{ "encryption_service", VERSION_encryption, &encryption_handler },
|
|
{ "logger_service", VERSION_logger, &logger_service_handler },
|
|
{ "my_crypt_service", VERSION_my_crypt, &crypt_handler},
|
|
{ "my_md5_service", VERSION_my_md5, &my_md5_handler},
|
|
{ "my_print_error_service", VERSION_my_print_error, &my_print_error_handler},
|
|
{ "my_sha1_service", VERSION_my_sha1, &my_sha1_handler},
|
|
{ "my_sha2_service", VERSION_my_sha2, &my_sha2_handler},
|
|
{ "my_snprintf_service", VERSION_my_snprintf, &my_snprintf_handler },
|
|
{ "progress_report_service", VERSION_progress_report, &progress_report_handler },
|
|
{ "thd_alloc_service", VERSION_thd_alloc, &thd_alloc_handler },
|
|
{ "thd_autoinc_service", VERSION_thd_autoinc, &thd_autoinc_handler },
|
|
{ "thd_error_context_service", VERSION_thd_error_context, &thd_error_context_handler },
|
|
{ "thd_kill_statement_service", VERSION_kill_statement, &thd_kill_statement_handler },
|
|
{ "thd_rnd_service", VERSION_thd_rnd, &thd_rnd_handler },
|
|
{ "thd_specifics_service", VERSION_thd_specifics, &thd_specifics_handler },
|
|
{ "thd_timezone_service", VERSION_thd_timezone, &thd_timezone_handler },
|
|
{ "thd_wait_service", VERSION_thd_wait, &thd_wait_handler },
|
|
{ "wsrep_service", VERSION_wsrep, &wsrep_handler },
|
|
{ "json_service", VERSION_json, &json_handler },
|
|
{ "thd_mdl_service", VERSION_thd_mdl, &thd_mdl_handler }
|
|
};
|
|
|