net: rename sysfs symlinks on device name change
authorVeaceslav Falico <vfalico@redhat.com>
Tue, 14 Jan 2014 20:58:51 +0000 (21:58 +0100)
committerDavid S. Miller <davem@davemloft.net>
Wed, 15 Jan 2014 23:16:20 +0000 (15:16 -0800)
commit5bb025fae53889cc99a21058c5dd369bf8cce820
treecc80601cdb7096b9dc4d9d5f14eb477c4dd82322
parent3ee32707560955e92d30f7f6e5138cb92a3b1a7e
net: rename sysfs symlinks on device name change

Currently, we don't rename the upper/lower_ifc symlinks in
/sys/class/net/*/ , which might result stale/duplicate links/names.

Fix this by adding netdev_adjacent_rename_links(dev, oldname) which renames
all the upper/lower interface's links to dev from the upper/lower_oldname
to the new name.

We don't need a rollback because only we control these symlinks and if we
fail to rename them - sysfs will anyway complain.

Reported-by: Ding Tianhong <dingtianhong@huawei.com>
CC: Ding Tianhong <dingtianhong@huawei.com>
CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Nicolas Dichtel <nicolas.dichtel@6wind.com>
CC: Cong Wang <amwang@redhat.com>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/netdevice.h
net/core/dev.c