nf_conntrack_timestamp not found

[prashant_chopad]

Hello All,

I have iMX8M Mini EVK.

I did setup a Yocto toolchain for version L5.4.24_2.1.0 on my Ubuntu 18.04 LTS system.

I did successfully "bitbake imx-image-multimedia"

Following are few logs:

root@imx8mmevk:~/# modinfo nf_conntrack

filename:       /lib/modules/5.4.24-2.1.0+gbabac008e5cf/kernel/net/netfilter/nf_conntrack.ko

license:        GPL

alias:          nf_conntrack-10

alias:          nf_conntrack-2

alias:          ip_conntrack

depends:        nf_defrag_ipv6,libcrc32c,nf_defrag_ipv4

intree:         Y

name:           nf_conntrack

vermagic:       5.4.24-2.1.0+gbabac008e5cf SMP preempt mod_unload modversions aarch64

parm:           acct:Enable connection tracking flow accounting. (bool)

parm:           nf_conntrack_helper:Enable automatic conntrack helper assignment (default 0) (bool)

parm:           expect_hashsize:uint

parm:           enable_hooks:Always enable conntrack hooks (bool)

--------------------------------

root@imx8mmevk:~# ls /proc/sys/net/netfilter/

nf_conntrack_acct                        nf_conntrack_sctp_timeout_cookie_wait

nf_conntrack_buckets                     nf_conntrack_sctp_timeout_established

nf_conntrack_checksum                    nf_conntrack_sctp_timeout_heartbeat_acked

nf_conntrack_count                       nf_conntrack_sctp_timeout_heartbeat_sent

nf_conntrack_dccp_loose                  nf_conntrack_sctp_timeout_shutdown_ack_sent

nf_conntrack_dccp_timeout_closereq       nf_conntrack_sctp_timeout_shutdown_recd

nf_conntrack_dccp_timeout_closing        nf_conntrack_sctp_timeout_shutdown_sent

nf_conntrack_dccp_timeout_open           nf_conntrack_tcp_be_liberal

nf_conntrack_dccp_timeout_partopen       nf_conntrack_tcp_loose

nf_conntrack_dccp_timeout_request        nf_conntrack_tcp_max_retrans

nf_conntrack_dccp_timeout_respond        nf_conntrack_tcp_timeout_close

nf_conntrack_dccp_timeout_timewait       nf_conntrack_tcp_timeout_close_wait

nf_conntrack_events                      nf_conntrack_tcp_timeout_established

nf_conntrack_expect_max                  nf_conntrack_tcp_timeout_fin_wait

nf_conntrack_frag6_high_thresh           nf_conntrack_tcp_timeout_last_ack

nf_conntrack_frag6_low_thresh            nf_conntrack_tcp_timeout_max_retrans

nf_conntrack_frag6_timeout               nf_conntrack_tcp_timeout_syn_recv

nf_conntrack_generic_timeout             nf_conntrack_tcp_timeout_syn_sent

nf_conntrack_helper                      nf_conntrack_tcp_timeout_time_wait

nf_conntrack_icmp_timeout                nf_conntrack_tcp_timeout_unacknowledged

nf_conntrack_icmpv6_timeout              nf_conntrack_udp_timeout

nf_conntrack_log_invalid                 nf_conntrack_udp_timeout_stream

nf_conntrack_max                         nf_log

nf_conntrack_sctp_timeout_closed         nf_log_all_netns

nf_conntrack_sctp_timeout_cookie_echoed

-------------------------------------

root@imx8mmevk:~#sysctl -w net.netfilter.nf_conntrack_timestamp=1

sysctl: cannot stat /proc/sys/net/netfilter/nf_conntrack_timestamp: No such file or directory

Why nf_conntrack_timestamp is missing from my image? How to make it available in image?

Thanks,

Prashant

[Bio_TICFSL]

Hello Prashant,

It looks like is disable by kernel, so you have to enable in the "core netfilter & configuration"

config NF_CONNTRACK_TIMESTAMP N

Then recompile the kernel.

Regards

[prashant_chopad]

@Bio_TICFSL ,

Instead of recompiling the kernel, can I build that module and then do insmod?

In such scenario, what module name shall I use to build?

Regards,

Prashant

[Bio_TICFSL]

Hello,

You can put whatever name you liked, just make sure that the code make reference to your code, in both ways you have to recompile the kernel.

Regards

[prashant_chopad]

@Bio_TICFSL ,

I am trying to avoid kernel compilation. This is a difference between Windows and Linux.

So here I want to bitbake only this module. But I don't know which module contains NF_CONNTRACK_TIMESTAMP. 

So here need your help to find the name of the module.

Regards,

Prashant