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Florent Fourcot says:
====================
rtnetlink: improve ALT_IFNAME config and fix dangerous GROUP usage
First commit forbids dangerous calls when both IFNAME and GROUP are
given, since it can introduce unexpected behaviour when IFNAME does not
match any interface.
Second patch achieves primary goal of this patchset to fix/improve
IFLA_ALT_IFNAME attribute, since previous code was never working for
newlink/setlink. ip-link command is probably getting interface index
before, and was not using this feature.
Last two patches are improving error code on corner cases.
Changes in v2:
* Remove ifname argument in rtnl_dev_get/do_setlink
functions (simplify code)
* Use a boolean to avoid condition duplication in __rtnl_newlink
Changes in v3:
* Simplify rtnl_dev_get signature
Changes in v4:
* Rename link_lookup to link_specified
Changes in v5:
* Re-order patches
====================
Link: https://lore.kernel.org/r/20220415165330.10497-1-florent.fourcot@wifirst.fr
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Linux kernel
============
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