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migration: Add migrate_add_blocker_internal()

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An internal version that removes -only-migratable implications.  It can be used
for temporary migration blockers like dump-guest-memory.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2021-09-22 12:20:08 -04:00 • committed by Juan Quintela
parent 4c170330aa
commit 60fd680193
2 changed files with 29 additions and 8 deletions
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21
migration/migration.c
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@ -2049,15 +2049,8 @@ void migrate_init(MigrationState *s)
s->threshold_size = 0;
}
int migrate_add_blocker(Error *reason, Error **errp)
int migrate_add_blocker_internal(Error *reason, Error **errp)
{
if (only_migratable) {
error_propagate_prepend(errp, error_copy(reason),
"disallowing migration blocker "
"(--only-migratable) for: ");
return -EACCES;
}
/* Snapshots are similar to migrations, so check RUN_STATE_SAVE_VM too. */
if (runstate_check(RUN_STATE_SAVE_VM) || !migration_is_idle()) {
error_propagate_prepend(errp, error_copy(reason),
@ -2070,6 +2063,18 @@ int migrate_add_blocker(Error *reason, Error **errp)
return 0;
}
int migrate_add_blocker(Error *reason, Error **errp)
{
if (only_migratable) {
error_propagate_prepend(errp, error_copy(reason),
"disallowing migration blocker "
"(--only-migratable) for: ");
return -EACCES;
}
return migrate_add_blocker_internal(reason, errp);
}
void migrate_del_blocker(Error *reason)
{
migration_blockers = g_slist_remove(migration_blockers, reason);