On embedded devices, often the BSSID of an access point must be set from
userspace during the boot process. This provides a relatively clean way
of doing that without major side effects.
Signed-off-by: Daniel Gimpelevich <daniel@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
--- a/net/wireless/sysfs.c 2014-04-19 08:36:52.048511623 -0700
+++ b/net/wireless/sysfs.c 2014-04-19 08:38:09.196894176 -0700
@@ -24,18 +24,30 @@
return container_of(dev, struct cfg80211_registered_device, wiphy.dev);
}
-#define SHOW_FMT(name, fmt, member) \
+#define SHOW_FMT(name, fmt, member, perm) \
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_ ## perm(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 count)
+{
+ u8 temp[ETH_ALEN];
+
+ if (sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", temp, temp + 1,
+ temp + 2, temp + 3, temp + 4, temp + 5) == ETH_ALEN)
+ memcpy(dev_to_rdev(dev)->wiphy.perm_addr, temp, ETH_ALEN);
+ return count;
+}
+
+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,
--
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