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Message-Id: <20210914195909.36035-3-verdre@v0yd.nl>
Date: Tue, 14 Sep 2021 21:59:02 +0200
From: Jonas Dreßler <verdre@...d.nl>
To: Amitkumar Karwar <amitkarwar@...il.com>,
Ganapathi Bhat <ganapathi017@...il.com>,
Sharvari Harisangam <sharvari.harisangam@....com>,
Xinming Hu <huxinming820@...il.com>,
Kalle Valo <kvalo@...eaurora.org>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Jonas Dreßler <verdre@...d.nl>,
Tsuchiya Yuto <kitakar@...il.com>,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org,
Maximilian Luz <luzmaximilian@...il.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Pali Rohár <pali@...nel.org>
Subject: [PATCH 2/9] mwifiex: Use function to check whether interface type change is allowed
Instead of bailing out in the function which is supposed to do the type
change, detect invalid changes beforehand using a generic function and
return an error if the change is not allowed.
Signed-off-by: Jonas Dreßler <verdre@...d.nl>
---
.../net/wireless/marvell/mwifiex/cfg80211.c | 139 ++++++++++++------
1 file changed, 92 insertions(+), 47 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index e8deba119ff1..dabc59c47de3 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -939,6 +939,76 @@ mwifiex_init_new_priv_params(struct mwifiex_private *priv,
return 0;
}
+static bool
+is_vif_type_change_allowed(struct mwifiex_adapter *adapter,
+ enum nl80211_iftype old_iftype,
+ enum nl80211_iftype new_iftype)
+{
+ switch (old_iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ switch (new_iftype) {
+ case NL80211_IFTYPE_STATION:
+ return true;
+ case NL80211_IFTYPE_P2P_CLIENT:
+ case NL80211_IFTYPE_P2P_GO:
+ return adapter->curr_iface_comb.p2p_intf !=
+ adapter->iface_limit.p2p_intf;
+ case NL80211_IFTYPE_AP:
+ return adapter->curr_iface_comb.uap_intf !=
+ adapter->iface_limit.uap_intf;
+ default:
+ return false;
+ }
+
+ case NL80211_IFTYPE_STATION:
+ switch (new_iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ return true;
+ case NL80211_IFTYPE_P2P_CLIENT:
+ case NL80211_IFTYPE_P2P_GO:
+ return adapter->curr_iface_comb.p2p_intf !=
+ adapter->iface_limit.p2p_intf;
+ case NL80211_IFTYPE_AP:
+ return adapter->curr_iface_comb.uap_intf !=
+ adapter->iface_limit.uap_intf;
+ default:
+ return false;
+ }
+
+ case NL80211_IFTYPE_AP:
+ switch (new_iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_STATION:
+ return adapter->curr_iface_comb.sta_intf !=
+ adapter->iface_limit.sta_intf;
+ case NL80211_IFTYPE_P2P_CLIENT:
+ case NL80211_IFTYPE_P2P_GO:
+ return adapter->curr_iface_comb.p2p_intf !=
+ adapter->iface_limit.p2p_intf;
+ default:
+ return false;
+ }
+
+ case NL80211_IFTYPE_P2P_CLIENT:
+ case NL80211_IFTYPE_P2P_GO:
+ switch (new_iftype) {
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_STATION:
+ return true;
+ case NL80211_IFTYPE_AP:
+ return adapter->curr_iface_comb.uap_intf !=
+ adapter->iface_limit.uap_intf;
+ default:
+ return false;
+ }
+
+ default:
+ break;
+ }
+
+ return false;
+}
+
static int
mwifiex_change_vif_to_p2p(struct net_device *dev,
enum nl80211_iftype curr_iftype,
@@ -955,13 +1025,6 @@ mwifiex_change_vif_to_p2p(struct net_device *dev,
adapter = priv->adapter;
- if (adapter->curr_iface_comb.p2p_intf ==
- adapter->iface_limit.p2p_intf) {
- mwifiex_dbg(adapter, ERROR,
- "cannot create multiple P2P ifaces\n");
- return -1;
- }
-
mwifiex_dbg(adapter, INFO,
"%s: changing role to p2p\n", dev->name);
@@ -1027,15 +1090,6 @@ mwifiex_change_vif_to_sta_adhoc(struct net_device *dev,
adapter = priv->adapter;
- if ((curr_iftype != NL80211_IFTYPE_P2P_CLIENT &&
- curr_iftype != NL80211_IFTYPE_P2P_GO) &&
- (adapter->curr_iface_comb.sta_intf ==
- adapter->iface_limit.sta_intf)) {
- mwifiex_dbg(adapter, ERROR,
- "cannot create multiple station/adhoc ifaces\n");
- return -1;
- }
-
if (type == NL80211_IFTYPE_STATION)
mwifiex_dbg(adapter, INFO,
"%s: changing role to station\n", dev->name);
@@ -1086,13 +1140,6 @@ mwifiex_change_vif_to_ap(struct net_device *dev,
adapter = priv->adapter;
- if (adapter->curr_iface_comb.uap_intf ==
- adapter->iface_limit.uap_intf) {
- mwifiex_dbg(adapter, ERROR,
- "cannot create multiple AP ifaces\n");
- return -1;
- }
-
mwifiex_dbg(adapter, INFO,
"%s: changing role to AP\n", dev->name);
@@ -1155,6 +1202,13 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
return 0;
}
+ if (!is_vif_type_change_allowed(priv->adapter, curr_iftype, type)) {
+ mwifiex_dbg(priv->adapter, ERROR,
+ "%s: change from type %d to %d is not allowed\n",
+ dev->name, curr_iftype, type);
+ return -EOPNOTSUPP;
+ }
+
switch (curr_iftype) {
case NL80211_IFTYPE_ADHOC:
switch (type) {
@@ -1175,12 +1229,9 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
return mwifiex_change_vif_to_ap(dev, curr_iftype, type,
params);
default:
- mwifiex_dbg(priv->adapter, ERROR,
- "%s: changing to %d not supported\n",
- dev->name, type);
- return -EOPNOTSUPP;
+ goto errnotsupp;
}
- break;
+
case NL80211_IFTYPE_STATION:
switch (type) {
case NL80211_IFTYPE_ADHOC:
@@ -1200,12 +1251,9 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
return mwifiex_change_vif_to_ap(dev, curr_iftype, type,
params);
default:
- mwifiex_dbg(priv->adapter, ERROR,
- "%s: changing to %d not supported\n",
- dev->name, type);
- return -EOPNOTSUPP;
+ goto errnotsupp;
}
- break;
+
case NL80211_IFTYPE_AP:
switch (type) {
case NL80211_IFTYPE_ADHOC:
@@ -1217,12 +1265,9 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
return mwifiex_change_vif_to_p2p(dev, curr_iftype,
type, params);
default:
- mwifiex_dbg(priv->adapter, ERROR,
- "%s: changing to %d not supported\n",
- dev->name, type);
- return -EOPNOTSUPP;
+ goto errnotsupp;
}
- break;
+
case NL80211_IFTYPE_P2P_CLIENT:
case NL80211_IFTYPE_P2P_GO:
switch (type) {
@@ -1251,21 +1296,21 @@ mwifiex_cfg80211_change_virtual_intf(struct wiphy *wiphy,
return mwifiex_change_vif_to_ap(dev, curr_iftype, type,
params);
default:
- mwifiex_dbg(priv->adapter, ERROR,
- "%s: changing to %d not supported\n",
- dev->name, type);
- return -EOPNOTSUPP;
+ goto errnotsupp;
}
- break;
+
default:
- mwifiex_dbg(priv->adapter, ERROR,
- "%s: unknown iftype: %d\n",
- dev->name, dev->ieee80211_ptr->iftype);
- return -EOPNOTSUPP;
+ goto errnotsupp;
}
return 0;
+
+errnotsupp:
+ mwifiex_dbg(priv->adapter, ERROR,
+ "unsupported interface type transition: %d to %d\n",
+ curr_iftype, type);
+ return -EOPNOTSUPP;
}
static void
--
2.31.1
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