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Subject[PATCH net-next v1 2/5] if_addr: add IFA_IF_NETNSID
This adds a new IFA_IF_NETNSID property to be used by address families such
as PF_INET and PF_INET6.
The IFA_IF_NETNSID property can be used to send a network namespace
identifier as part of a request. If a IFA_IF_NETNSID property is identified
it will be used to retrieve the target network namespace in which the
request is to be made.

Signed-off-by: Christian Brauner <>
Cc: Jiri Benc <>
Cc: Nicolas Dichtel <>
- unchanged
Note, I did not change the property name to IFA_TARGET_NSID as there
was no clear agreement what would be preferred. My personal preference
is to keep the IFA_IF_NETNSID name because it aligns naturally with
the IFLA_IF_NETNSID property for RTM_*LINK requests. Jiri seems to
prefer this name too.
However, if there is agreement that another property name makes more
sense I'm happy to send a v2 that changes this.
include/uapi/linux/if_addr.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/if_addr.h b/include/uapi/linux/if_addr.h
index ebaf5701c9db..0e0cd588cac0 100644
--- a/include/uapi/linux/if_addr.h
+++ b/include/uapi/linux/if_addr.h
@@ -34,6 +34,7 @@ enum {
IFA_RT_PRIORITY, /* u32, priority/metric for prefix route */

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