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cfg80211: add support for changing the device mac address via sysfs

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 43638
This commit is contained in:
Felix Fietkau 2014-12-11 20:07:58 +00:00
parent bb4ffcf928
commit ff06d03a38
1 changed files with 43 additions and 0 deletions
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43
package/kernel/mac80211/patches/120-cfg80211_allow_perm_addr_change.patch Normal file
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@ -0,0 +1,43 @@
--- a/net/wireless/sysfs.c
+++ b/net/wireless/sysfs.c
@@ -24,18 +24,35 @@ static inline struct cfg80211_registered
return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
}
-#define SHOW_FMT(name, fmt, member) \
+#define SHOW_FMT(name, fmt, member, mode) \
static ssize_t name ## _show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member); \
} \
-static DEVICE_ATTR_RO(name)
+static DEVICE_ATTR_##mode(name)
-SHOW_FMT(index, "%d", wiphy_idx);
-SHOW_FMT(macaddress, "%pM", wiphy.perm_addr);
-SHOW_FMT(address_mask, "%pM", wiphy.addr_mask);
+static ssize_t macaddress_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ u8 mac[ETH_ALEN];
+
+ if (!mac_pton(buf, mac))
+ return -EINVAL;
+
+ if (buf[3 * ETH_ALEN - 1] && buf[3 * ETH_ALEN - 1] != '\n')
+ return -EINVAL;
+
+ memcpy(dev_to_rdev(dev)->wiphy.perm_addr, mac, ETH_ALEN);
+
+ return strnlen(buf, len);
+}
+
+SHOW_FMT(index, "%d", wiphy_idx, RO);
+SHOW_FMT(macaddress, "%pM", wiphy.perm_addr, RW);
+SHOW_FMT(address_mask, "%pM", wiphy.addr_mask, RO);
static ssize_t name_show(struct device *dev,
struct device_attribute *attr,