net: create sysfs symlinks for neighbour devices
Also, remove the same functionality from bonding - it will be already done
for any device that links to its lower/upper neighbour.
The links will be created for dev's kobject, and will look like
lower_eth0 for lower device eth0 and upper_bridge0 for upper device
bridge0.
CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jiri Pirko <jiri@resnulli.us>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index de443ee..25ab6fe 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4584,6 +4584,7 @@
void *private, bool master)
{
struct netdev_adjacent *adj;
+ char linkname[IFNAMSIZ+7];
int ret;
adj = __netdev_find_adj(dev, adj_dev, dev_list);
@@ -4606,12 +4607,26 @@
pr_debug("dev_hold for %s, because of link added from %s to %s\n",
adj_dev->name, dev->name, adj_dev->name);
+ if (dev_list == &dev->adj_list.lower) {
+ sprintf(linkname, "lower_%s", adj_dev->name);
+ ret = sysfs_create_link(&(dev->dev.kobj),
+ &(adj_dev->dev.kobj), linkname);
+ if (ret)
+ goto free_adj;
+ } else if (dev_list == &dev->adj_list.upper) {
+ sprintf(linkname, "upper_%s", adj_dev->name);
+ ret = sysfs_create_link(&(dev->dev.kobj),
+ &(adj_dev->dev.kobj), linkname);
+ if (ret)
+ goto free_adj;
+ }
+
/* Ensure that master link is always the first item in list. */
if (master) {
ret = sysfs_create_link(&(dev->dev.kobj),
&(adj_dev->dev.kobj), "master");
if (ret)
- goto free_adj;
+ goto remove_symlinks;
list_add_rcu(&adj->list, dev_list);
} else {
@@ -4620,6 +4635,15 @@
return 0;
+remove_symlinks:
+ if (dev_list == &dev->adj_list.lower) {
+ sprintf(linkname, "lower_%s", adj_dev->name);
+ sysfs_remove_link(&(dev->dev.kobj), linkname);
+ } else if (dev_list == &dev->adj_list.upper) {
+ sprintf(linkname, "upper_%s", adj_dev->name);
+ sysfs_remove_link(&(dev->dev.kobj), linkname);
+ }
+
free_adj:
kfree(adj);
@@ -4631,6 +4655,7 @@
struct list_head *dev_list)
{
struct netdev_adjacent *adj;
+ char linkname[IFNAMSIZ+7];
adj = __netdev_find_adj(dev, adj_dev, dev_list);
@@ -4650,6 +4675,14 @@
if (adj->master)
sysfs_remove_link(&(dev->dev.kobj), "master");
+ if (dev_list == &dev->adj_list.lower) {
+ sprintf(linkname, "lower_%s", adj_dev->name);
+ sysfs_remove_link(&(dev->dev.kobj), linkname);
+ } else if (dev_list == &dev->adj_list.upper) {
+ sprintf(linkname, "upper_%s", adj_dev->name);
+ sysfs_remove_link(&(dev->dev.kobj), linkname);
+ }
+
list_del_rcu(&adj->list);
pr_debug("dev_put for %s, because link removed from %s to %s\n",
adj_dev->name, dev->name, adj_dev->name);