The nl80211 interface allows creating new netdevs from user-space. The
name is *always* provided by user-space, so we should set NET_NAME_USER to
provide that information via sysfs. But we must not set it for the default
wlan%d names as these are kernel-provided names.
This allows udev to not rename dynamically created wifi devices (like wifi
P2P devices).
Cc: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
Acked-by: Tom Gundersen <teg@xxxxxxx>
---
net/mac80211/cfg.c | 2 +-
net/mac80211/ieee80211_i.h | 1 +
net/mac80211/iface.c | 2 ++
net/mac80211/main.c | 2 +-
4 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index aaa59d7..804cf0a 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -31,7 +31,7 @@ static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy,
struct ieee80211_sub_if_data *sdata;
int err;
- err = ieee80211_if_add(local, name, &wdev, type, params);
+ err = ieee80211_if_add(local, name, NET_NAME_USER, &wdev, type, params);
if (err)
return ERR_PTR(err);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 222c28b..1a938c3 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1470,6 +1470,7 @@ int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
int ieee80211_iface_init(void);
void ieee80211_iface_exit(void);
int ieee80211_if_add(struct ieee80211_local *local, const char *name,
+ unsigned char name_assign_type,
struct wireless_dev **new_wdev, enum nl80211_iftype type,
struct vif_params *params);
int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index b8d331e..fe84853 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1574,6 +1574,7 @@ static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
}
int ieee80211_if_add(struct ieee80211_local *local, const char *name,
+ unsigned char name_assign_type,
struct wireless_dev **new_wdev, enum nl80211_iftype type,
struct vif_params *params)
{
@@ -1617,6 +1618,7 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
+ IEEE80211_ENCRYPT_HEADROOM;
ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
+ ndev->name_assign_type = name_assign_type;
ret = dev_alloc_name(ndev, ndev->name);
if (ret < 0) {
free_netdev(ndev);
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index b055f6a5..ee32a83 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1012,7 +1012,7 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
/* add one default STA interface if supported */
if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) {
- result = ieee80211_if_add(local, "wlan%d", NULL,
+ result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL,
NL80211_IFTYPE_STATION, NULL);
if (result)
wiphy_warn(local->hw.wiphy,
--
1.9.1
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