On Wed, May 25, 2022 at 3:20 AM Hangbin Liu liuhangbin@gmail.com wrote:
On Wed, May 25, 2022 at 11:18:19AM +0800, Yun Lu wrote:
From: luyun luyun@kylinos.cn
The psock_snd test sends and recieves packets over loopback, and the test results depend on parameter settings: Set rp_filter=0, or set rp_filter=1 and accept_local=1 so that the test will pass. Otherwise, this test will fail with Resource temporarily unavailable: sudo ./psock_snd.sh dgram tx: 128 rx: 142 ./psock_snd: recv: Resource temporarily unavailable
For most distro kernel releases(like Ubuntu or Centos), the parameter rp_filter is enabled by default, so it's necessary to enable the parameter lo.accept_local in psock_snd test. And this test runs inside a netns, changing a sysctl is fine.
v2: add detailed description.
Suggested-by: Willem de Bruijn willemdebruijn.kernel@gmail.com Signed-off-by: luyun luyun@kylinos.cn Reviewed-by: Jackie Liu liuyun01@kylinos.cn
Acked-by: Willem de Bruijn willemb@google.com
ps: I did not really suggest this fix, but no need to respin just to remove that