[dm-devel] [PATCH 2/2] multipath-tools: report different piority value for rdac if io-shipping is enabled

[Moger, Babu]

This patch adds code to report different priority value if the storage is configured with io-shipping.
It sets  the bit 3 if io-shipping is enabled. This is to differentiate between different modes.

Signed-off-by: Babu Moger <babu.moger at lsi.com>
Reviewed-by : Yanling Qi <yanling.qi at lsi.com> 
Reviewed-by : Somasundaram Krishnasamy <Somasundaram.Krishnasamy at lsi.com>

---
--- multipath-tools/libmultipath/prioritizers/rdac.c.orig	2011-04-01 17:06:25.000000000 -0500
+++ multipath-tools/libmultipath/prioritizers/rdac.c	2011-04-01 17:30:27.000000000 -0500
@@ -81,6 +81,10 @@ int rdac_prio(const char *dev, int fd)
 		break;
 	}
 
+	/* For ioship mode set the bit 3 (00001000) */
+	if ((sense_buffer[8] >> 5) & 0x01)
+		ret |= 0x08;
+
 out:
 	return(ret);
 }