can't listen ipv4 address

[CCCAUCHY]

what ever net.ipv6.bindv6only is 1 or 0, I can't access ksmbd server over ipv4

[namjaejeon]

@CCCAUCHY Can you fix this after checking source code ?

[CCCAUCHY]

@CCCAUCHY Can you fix this after checking source code ?

Sorry, I'm not good at linux kernel development

And ksmbd made my amazon linux auto reboot always, maybe I should try samba.

[namjaejeon]

Can you describe how to reproduce this ? Because ksmbd try to create ipv4 socket if ipv6 fail.

[CCCAUCHY]

Can you describe how to reproduce this ? Because ksmbd try to create ipv4 socket if ipv6 fail.

I install ksmbd on aws(amazon linux), then I intall tools and configure it, after ksmbd.mountd and netstat -nlpt, no ipv4 port listening, also can't access over ipv4.

I try it on Ubuntu just now, it listen two ports 445 this time.

root@nfs:/home/ubuntu# ksmbd.control -s
root@nfs:/home/ubuntu# ksmbd.mountd
root@nfs:/home/ubuntu# netstat -nlpt|grep 445
tcp6       0      0 :::445                  :::*                    LISTEN      -
tcp6       0      0 :::445                  :::*                    LISTEN      -

If you can not reproduce this, I will share my cloud instance to you, then I will delete the instance after you find out the reason.

[oleksandrl5]

I have the same issue on alpine 3.19

[namjaejeon]

@oleksandrl5 Please share error prints on dmesg at least.

[namjaejeon]

@CCCAUCHY @oleksandrl5 Okay, I understood what is problem. I will check it. Thanks.

[namjaejeon]

@CCCAUCHY Even when net.ipv6.bindv6only is 0, IPv4 connection is not possible? I received another report that IPv4 connection was not possible only when net.ipv6.bindv6only was 1. i.e. they said there is no problem when the value is 0.

[CCCAUCHY]

@CCCAUCHY Even when net.ipv6.bindv6only is 0, IPv4 connection is not possible? I received another report that IPv4 connection was not possible only when net.ipv6.bindv6only was 1. i.e. they said there is no problem when the value is 0.

It works on Ubuntu indeed. My problem is on Amazon Linux. And I have given up building NAS.

[namjaejeon]

@CCCAUCHY Thanks for checking it on Ubuntu.

Can you check if this change fixes your issue on Amazon Linux ?

diff --git a/fs/smb/server/transport_tcp.c b/fs/smb/server/transport_tcp.c
index 002a3f0dc7c5..6633fa78e9b9 100644
--- a/fs/smb/server/transport_tcp.c
+++ b/fs/smb/server/transport_tcp.c
@@ -448,6 +448,10 @@ static int create_socket(struct interface *iface)
                sin6.sin6_family = PF_INET6;
                sin6.sin6_addr = in6addr_any;
                sin6.sin6_port = htons(server_conf.tcp_port);
+
+               lock_sock(ksmbd_socket->sk);
+               ksmbd_socket->sk->sk_ipv6only = false;
+               release_sock(ksmbd_socket->sk);
        }
 
        ksmbd_tcp_nodelay(ksmbd_socket);

[CCCAUCHY]

@CCCAUCHY Thanks for checking it on Ubuntu.

Can you check if this change fixes your issue on Amazon Linux ?

diff --git a/fs/smb/server/transport_tcp.c b/fs/smb/server/transport_tcp.c
index 002a3f0dc7c5..6633fa78e9b9 100644
--- a/fs/smb/server/transport_tcp.c
+++ b/fs/smb/server/transport_tcp.c
@@ -448,6 +448,10 @@ static int create_socket(struct interface *iface)
                sin6.sin6_family = PF_INET6;
                sin6.sin6_addr = in6addr_any;
                sin6.sin6_port = htons(server_conf.tcp_port);
+
+               lock_sock(ksmbd_socket->sk);
+               ksmbd_socket->sk->sk_ipv6only = false;
+               release_sock(ksmbd_socket->sk);
        }
 
        ksmbd_tcp_nodelay(ksmbd_socket);

Sorry, I am not good at compile. I just install ksmbd by yum.