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conf, pasta: With --config-net, copy all routes by default

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Use the newly-introduced NL_DUP mode for nl_route() to copy all the
routes associated to the template interface in the outer namespace,
unless --no-copy-routes (also implied by -g) is given.

This option is introduced as deprecated right away: it's not expected
to be of any use, but it's helpful to keep it around for a while to
debug any suspected issue with this change.

Otherwise, we can't use default gateways which are not, address-wise,
on the same subnet as the container, as reported by Callum.

Reported-by: Callum Parsey <callum@neoninteger.au>
Link: https://github.com/containers/podman/issues/18539
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Stefano Brivio 2023-05-14 15:04:38 +02:00
parent 468f19a852
commit da54641f14
4 changed files with 38 additions and 3 deletions

4
passt.h
View file

@ -181,7 +181,8 @@ struct ip6_ctx {
* @ip6: IPv6 configuration
* @pasta_ifn: Name of namespace interface for pasta
* @pasta_ifn: Index of namespace interface for pasta
* @pasta_conf_ns: Configure namespace interface after creating it
* @pasta_conf_ns: Configure namespace after creating it
* @no_copy_routes: Don't copy all routes when configuring target namespace
* @no_tcp: Disable TCP operation
* @tcp: Context for TCP protocol handler
* @no_tcp: Disable UDP operation
@ -240,6 +241,7 @@ struct ctx {
char pasta_ifn[IF_NAMESIZE];
unsigned int pasta_ifi;
int pasta_conf_ns;
int no_copy_routes;
int no_tcp;
struct tcp_ctx tcp;