[sheepdog] [PATCH 5/7] sheep: update store version

[MORITA Kazutaka]

From: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>

There is no compatibility after changing a hash function for the
consistent hash ring.

The upgrade code is not implemented yet.

Signed-off-by: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>
---
 sheep/config.c  |    2 +-
 sheep/migrate.c |    8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/sheep/config.c b/sheep/config.c
index 67198c0..6fe1437 100644
--- a/sheep/config.c
+++ b/sheep/config.c
@@ -11,7 +11,7 @@
 
 #include "sheep_priv.h"
 
-#define SD_FORMAT_VERSION 0x0002
+#define SD_FORMAT_VERSION 0x0003
 #define SD_CONFIG_SIZE 40
 
 static struct sheepdog_config {
diff --git a/sheep/migrate.c b/sheep/migrate.c
index 77fc6b9..fa020e7 100644
--- a/sheep/migrate.c
+++ b/sheep/migrate.c
@@ -418,9 +418,17 @@ static int migrate_from_v1_to_v2(void)
 	return ret;
 }
 
+static int migrate_from_v2_to_v3(void)
+{
+	sd_err("not implemented");
+
+	return -1;
+}
+
 static int (*migrate[])(void) = {
 	migrate_from_v0_to_v1, /* from 0.4.0 or 0.5.0 to 0.5.1 */
 	migrate_from_v1_to_v2, /* from 0.5.x to 0.6.0 */
+	migrate_from_v2_to_v3, /* from 0.6.x or 0.7.x to 0.8.x */
 };
 
 int sd_migrate_store(int from, int to)
-- 
1.7.9.5