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migration_cancel: shutdown migration socket 

Force shutdown on migration socket on cancel to cause the cancel
to complete even if the socket is blocked on a dead network.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2015-01-08 11:11:32 +00:00 committed by Amit Shah
parent 131fe9b843
commit a26ba26e21
1 changed files with 12 additions and 0 deletions
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12
migration/migration.c
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@ -330,6 +330,7 @@ void migrate_fd_error(MigrationState *s)
static void migrate_fd_cancel(MigrationState *s)
{
int old_state ;
QEMUFile *f = migrate_get_current()->file;
trace_migrate_fd_cancel();
do {
@ -339,6 +340,17 @@ static void migrate_fd_cancel(MigrationState *s)
}
migrate_set_state(s, old_state, MIG_STATE_CANCELLING);
} while (s->state != MIG_STATE_CANCELLING);
/*
* If we're unlucky the migration code might be stuck somewhere in a
* send/write while the network has failed and is waiting to timeout;
* if we've got shutdown(2) available then we can force it to quit.
* The outgoing qemu file gets closed in migrate_fd_cleanup that is
* called in a bh, so there is no race against this cancel.
*/
if (s->state == MIG_STATE_CANCELLING && f) {
qemu_file_shutdown(f);
}
}
void add_migration_state_change_notifier(Notifier *notify)