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migration: introduce decompress-error-check

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QEMU 3.0 enables strict check for compression & decompression to
make the migration more robust, that depends on the source to fix
the internal design which triggers the unexpected error conditions

To make it work for migrating old version QEMU to 2.13 QEMU, we
introduce this parameter to disable the error check on the
destination which is the default behavior of the machine type
which is older than 2.13, alternately, the strict check can be
enabled explicitly as followings:
      -M pc-q35-2.11 -global migration.decompress-error-check=true

Signed-off-by: Xiao Guangrong <xiaoguangrong@tencent.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Xiao Guangrong 2018-05-03 16:06:11 +08:00 • committed by Juan Quintela
parent 392fba9f58
commit f548222c24
7 changed files with 24 additions and 2 deletions
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4
migration/migration.c
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@ -2971,6 +2971,8 @@ void migration_global_dump(Monitor *mon)
ms->send_configuration ? "on" : "off");
monitor_printf(mon, "send-section-footer: %s\n",
ms->send_section_footer ? "on" : "off");
monitor_printf(mon, "decompress-error-check: %s\n",
ms->decompress_error_check ? "on" : "off");
}
#define DEFINE_PROP_MIG_CAP(name, x) \
@ -2984,6 +2986,8 @@ static Property migration_properties[] = {
send_configuration, true),
DEFINE_PROP_BOOL("send-section-footer", MigrationState,
send_section_footer, true),
DEFINE_PROP_BOOL("decompress-error-check", MigrationState,
decompress_error_check, true),
/* Migration parameters */
DEFINE_PROP_UINT8("x-compress-level", MigrationState,