atm: expose ATM device index in sysfs
It's currently exposed only through /proc which, besides requiring
screen-scraping, doesn't allow userspace to distinguish between two
identical ATM adapters with different ATM indexes. The ATM device index
is required when using PPPoATM on a system with multiple ATM adapters.
Signed-off-by: Dan Williams <dcbw@redhat.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: David Woodhouse <dwmw2@infradead.org>
Cc: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/atm/atm_sysfs.c b/net/atm/atm_sysfs.c
index f7fa67c..f49da58 100644
--- a/net/atm/atm_sysfs.c
+++ b/net/atm/atm_sysfs.c
@@ -59,6 +59,14 @@
return pos - buf;
}
+static ssize_t show_atmindex(struct device *cdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ return sprintf(buf, "%d\n", adev->number);
+}
+
static ssize_t show_carrier(struct device *cdev,
struct device_attribute *attr, char *buf)
{
@@ -99,6 +107,7 @@
static DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
+static DEVICE_ATTR(atmindex, S_IRUGO, show_atmindex, NULL);
static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
static DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
@@ -106,6 +115,7 @@
static struct device_attribute *atm_attrs[] = {
&dev_attr_atmaddress,
&dev_attr_address,
+ &dev_attr_atmindex,
&dev_attr_carrier,
&dev_attr_type,
&dev_attr_link_rate,