netdev - [PATCH net-next 1/2] devlink: Enhance policy to validate eswitch mode value

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Date:   Mon, 21 Sep 2020 19:41:29 +0300
From:   Parav Pandit <parav@...dia.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>
CC:     Parav Pandit <parav@...dia.com>, Jiri Pirko <jiri@...dia.com>
Subject: [PATCH net-next 1/2] devlink: Enhance policy to validate eswitch mode value

Use range checking facility of nla_policy to validate eswitch mode input
attribute value is valid or not.

Signed-off-by: Parav Pandit <parav@...dia.com>
Reviewed-by: Jiri Pirko <jiri@...dia.com>
---
 net/core/devlink.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 25dd9309e86f..4ecc68a9c7df 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -7202,7 +7202,8 @@ static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
 	[DEVLINK_ATTR_SB_POOL_THRESHOLD_TYPE] = { .type = NLA_U8 },
 	[DEVLINK_ATTR_SB_THRESHOLD] = { .type = NLA_U32 },
 	[DEVLINK_ATTR_SB_TC_INDEX] = { .type = NLA_U16 },
-	[DEVLINK_ATTR_ESWITCH_MODE] = { .type = NLA_U16 },
+	[DEVLINK_ATTR_ESWITCH_MODE] = NLA_POLICY_RANGE(NLA_U16, DEVLINK_ESWITCH_MODE_LEGACY,
+						       DEVLINK_ESWITCH_MODE_SWITCHDEV),
 	[DEVLINK_ATTR_ESWITCH_INLINE_MODE] = { .type = NLA_U8 },
 	[DEVLINK_ATTR_ESWITCH_ENCAP_MODE] = { .type = NLA_U8 },
 	[DEVLINK_ATTR_DPIPE_TABLE_NAME] = { .type = NLA_NUL_STRING },
-- 
2.26.2