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>
(cherry picked and merged from commit 5bb025fae53889cc99a21058c5dd369bf8cce820)
Change-Id: I31a2f1800a7a181189c031d53ea1deef0ae137fc
Reviewed-on: http://git.am.freescale.net:8181/11048
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Mihai Claudiu Caraman <mihai.caraman@freescale.com>
Reviewed-by: Jose Rivera <German.Rivera@freescale.com>

0 files changed, 0 insertions, 0 deletions