[blackest]

Hi,

Quick version info:
Router ModelTP-Link ARCHER-C7 v2
Firmware VersionDD-WRT v3.0-r44538 std (10/13/20)

Seems like I have two issues with samba:
1. From time to time (even a couple times a day) I cannot mount samba share to windows or any other device in network, that includes nextcloud instance.
Workaround is to ether change share name or restart smb3 service via ssh with service samba3 restart command.
What is strange, whenever samba share cannot be mounted, all processes on router seems to be up and running:
root@DD-WRT:~# ps | grep smb
3733 root 1388 S ksmbd.mountd -c /tmp/smb.conf -u /tmp/smb.db
3734 root 1416 S ksmbd.mountd -c /tmp/smb.conf -u /tmp/smb.db
3737 root 0 SW [ksmbd-br1]
3738 root 0 SW [ksmbd-br0]
3739 root 0 SW [ksmbd-eth0]
3772 root 0 SW [ksmbd:62941]

Question: What causes periodical 'freezes' of samba ?
Note,


2. I'm getting those messages in syslog whenever I reach share files via my nextcloud instance (nextcloud 20):
Oct 24 16:04:35 _gateway kernel: [ 140.100000] ksmbd: create_smb2_pipe:1805: Unable to open RPC pipe: -22
Oct 24 16:04:37 _gateway kernel: [ 142.480000] ksmbd: __rpc_method:85: Unsupported RPC: lsarpc
Question: what is causing those messages ?


SMB version:
server min protocol = SMB2_02
server max protocol = SMB3_11


Regards,
b.

[neuviemeporte]

I encountered similar problems with samba shares with build v3.0-r44715 std (11/30/2020) on my Asus RT-N18U.

I killed one of the ksmbd.mountd processes and it got immediately restarted. I killed the other one and it remained dead. Also, samba shares started working normally again.

I'm wondering if there's a problem where DD-WRT is spawning two instances of the daemon and they keep interfering with each other?

[blkt]

A lot of changes since r44715, especially in the past few weeks for ksmbd. Should be running r45632, ksmbd 3.3.3 plus additional work done, or wait for the next build whenever it releases with ksmbd 3.3.4 and more.

[egorenar]

I'm also having a lot of problems with ksmbd.
Especially with iOS devices, i can't get it mounted most of the time. But sometimes it works. BTW the user space smbd from Entware is also causing problems. SO ksmbd is not alone at least.

For example:
[ 2440.943723] ksmbd: smb2_check_sign_req:8209: bad smb2 signature
[ 2441.603146] ksmbd: smb2_check_sign_req:8209: bad smb2 signature
[ 2441.616731] ksmbd: smb2_check_sign_req:8209: bad smb2 signature
[ 2441.725669] ksmbd: smb2_check_sign_req:8209: bad smb2 signature
[ 2441.740590] ksmbd: smb2_check_sign_req:8209: bad smb2 signature
[ 2494.164853] ksmbd: smb2_check_sign_req:8209: bad smb2 signature

Or this:
[ 3773.485979] ksmbd: smb2_sess_setup:1682: Not support authentication
[ 3773.526897] ksmbd: build_sess_rsp_noextsec:972: server challenge is not assigned in negotiate
[ 3774.780099] ksmbd: build_sess_rsp_noextsec:972: server challenge is not assigned in negotiate
[ 3788.407401] ksmbd: smb2_sess_setup:1682: Not support authentication
[ 3788.530420] ksmbd: build_sess_rsp_noextsec:972: server challenge is not assigned in negotiate
[ 3789.875574] ksmbd: build_sess_rsp_noextsec:972: server challenge is not assigned in negotiate
[ 3790.676177] ksmbd: __rpc_method:91: Unsupported RPC: ping.txt
[ 3790.681922] ksmbd: create_smb2_pipe:1966: Unable to open RPC pipe: -22
[ 3809.237801] ksmbd: smb2_sess_setup:1682: Not support authentication
[ 3809.350189] ksmbd: build_sess_rsp_noextsec:972: server challenge is not assigned in negotiate
[ 3810.557566] ksmbd: build_sess_rsp_noextsec:972: server challenge is not assigned in negotiate


But my Linux PC has no issues. I guess because samba implementation on my Linux PC is compatible with the one on my router but iOS uses a different implementation. Only a guess so.