[dm-devel] [PATCH v2 07/20] libmultipath: get_vpd_sgio: support VPD 0xc9

[Martin Wilck]

This VPD is needed to check for NetApp E-Series RDAC support.
---
 libmultipath/discovery.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 43631c46f21e..8ae170ee3a27 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -1118,7 +1118,11 @@ get_vpd_sgio (int fd, int pg, char * str, int maxlen)
 		len = parse_vpd_pg80(buff, str, maxlen);
 	else if (pg == 0x83)
 		len = parse_vpd_pg83(buff, buff_len, str, maxlen);
-	else
+	else if (pg == 0xc9 && maxlen >= 8) {
+		len = buff_len < 8 ? -ENODATA :
+			(buff_len <= maxlen ? buff_len : maxlen);
+		memcpy (str, buff, len);
+	} else
 		len = -ENOSYS;
 
 	return len;
-- 
2.15.1