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Date: Tue, 2 Feb 2021 20:06:05 +0200
From: Danielle Ratson <danieller@...dia.com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <kuba@...nel.org>, <jiri@...dia.com>,
<andrew@...n.ch>, <f.fainelli@...il.com>, <mkubecek@...e.cz>,
<mlxsw@...dia.com>, <idosch@...dia.com>,
Danielle Ratson <danieller@...dia.com>
Subject: [PATCH net-next v4 1/8] ethtool: Validate master slave configuration before rtnl_lock()
Create a new function for input validations to be called before
rtnl_lock() and move the master slave validation to that function.
This would be a cleanup for next patch that would add another validation
to the new function.
Signed-off-by: Danielle Ratson <danieller@...dia.com>
---
net/ethtool/linkmodes.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)
diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c
index c5bcb9abc8b9..bb8a3351fb72 100644
--- a/net/ethtool/linkmodes.c
+++ b/net/ethtool/linkmodes.c
@@ -325,6 +325,21 @@ static bool ethnl_validate_master_slave_cfg(u8 cfg)
return false;
}
+static int ethnl_check_linkmodes(struct genl_info *info, struct nlattr **tb)
+{
+ const struct nlattr *master_slave_cfg;
+
+ master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];
+ if (master_slave_cfg &&
+ !ethnl_validate_master_slave_cfg(nla_get_u8(master_slave_cfg))) {
+ NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
+ "master/slave value is invalid");
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,
struct ethtool_link_ksettings *ksettings,
bool *mod)
@@ -336,19 +351,11 @@ static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,
master_slave_cfg = tb[ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG];
if (master_slave_cfg) {
- u8 cfg = nla_get_u8(master_slave_cfg);
-
if (lsettings->master_slave_cfg == MASTER_SLAVE_CFG_UNSUPPORTED) {
NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
"master/slave configuration not supported by device");
return -EOPNOTSUPP;
}
-
- if (!ethnl_validate_master_slave_cfg(cfg)) {
- NL_SET_ERR_MSG_ATTR(info->extack, master_slave_cfg,
- "master/slave value is invalid");
- return -EOPNOTSUPP;
- }
}
*mod = false;
@@ -386,6 +393,10 @@ int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
bool mod = false;
int ret;
+ ret = ethnl_check_linkmodes(info, tb);
+ if (ret < 0)
+ return ret;
+
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_LINKMODES_HEADER],
genl_info_net(info), info->extack,
--
2.26.2
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