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net: Support filtering interfaces on no master

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Currently there's support for filtering neighbours/links for interfaces
which have a specific master device (using the IFLA_MASTER/NDA_MASTER
attributes).

This patch adds support for filtering interfaces/neighbours dump for
interfaces that *don't* have a master.

Signed-off-by: Lahav Schlesinger <lschlesinger@drivenets.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20210810090658.2778960-1-lschlesinger@drivenets.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Lahav Schlesinger 2021-08-10 09:06:58 +00:00 committed by Jakub Kicinski
parent a5397d68b2
commit d3432bf10f
2 changed files with 14 additions and 0 deletions
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7
net/core/neighbour.c
View File

@ -2528,6 +2528,13 @@ static bool neigh_master_filtered(struct net_device *dev, int master_idx)
return false;
master = dev ? netdev_master_upper_dev_get(dev) : NULL;
/* 0 is already used to denote NDA_MASTER wasn't passed, therefore need another
* invalid value for ifindex to denote "no master".
*/
if (master_idx == -1)
return !!master;
if (!master || master->ifindex != master_idx)
return true;

7
net/core/rtnetlink.c
View File

@ -1959,6 +1959,13 @@ static bool link_master_filtered(struct net_device *dev, int master_idx)
return false;
master = netdev_master_upper_dev_get(dev);
/* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need
* another invalid value for ifindex to denote "no master".
*/
if (master_idx == -1)
return !!master;
if (!master || master->ifindex != master_idx)
return true;