[Samba] dfs links anywhere?

Aurélien Aptel aaptel at suse.com
Thu Sep 14 00:52:51 UTC 2017

Chad William Seys <cwseys at physics.wisc.edu> writes:
> Somehow the destination having 'msdfsroot yes' prevents the cifs kernel 
> module from following the link.

Could you provide a network trace from the linux client of you mounting
and accessing this multi-level target, along with verbose kernel logs?

    echo 'module cifs +p' > /sys/kernel/debug/dynamic_debug/control
    echo 'file fs/cifs/* +p' > /sys/kernel/debug/dynamic_debug/control
    echo 1 > /proc/fs/cifs/cifsFYI
    echo 1 > /sys/module/dns_resolver/parameters/debug
    dmesg --clear
    tcpdump -w trace.pcap & pid=$!
    sleep 3
    mount.cifs ....cd ... ls.. blahblah
    sleep 3
    kill $pid
    dmesg > trace.log

this should produce a trace.pcap and trace.log file.

Aurélien Aptel / SUSE Labs Samba Team
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