- Add support for 'memsync' mode. This is the fastest replication mode that's

  why it will now be the default.
- Bump protocol version to 2 and add backward compatibility for version 1.
- Allow to specify hosts by kern.hostid as well (in addition to hostname and
  kern.hostuuid) in configuration file.

Sponsored by:	Panzura
Tested by:	trociny

1 files changed, 57 insertions, 0 deletions

diff --git a/sbin/hastd/refcnt.h b/sbin/hastd/refcnt.h
new file mode 100644
index 0000000..a989df0
--- /dev/null
+++ b/sbin/hastd/refcnt.h
@@ -0,0 +1,57 @@
+/*-
+ * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef __REFCNT_H__
+#define __REFCNT_H__
+
+#include <machine/atomic.h>
+
+#include "pjdlog.h"
+
+static __inline void
+refcnt_acquire(volatile unsigned int *count)
+{
+
+	atomic_add_acq_int(count, 1);
+}
+
+static __inline unsigned int
+refcnt_release(volatile unsigned int *count)
+{
+	unsigned int old;
+
+	/* XXX: Should this have a rel membar? */
+	old = atomic_fetchadd_int(count, -1);
+	PJDLOG_ASSERT(old > 0);
+	return (old - 1);
+}
+
+#endif	/* ! __REFCNT_H__ */