nf_conntrack_timestamp not found

prashant_chopad — Mon, 19 Jul 2021 12:08:39 GMT

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

Re: nf_conntrack_timestamp not found

Bio_TICFSL — Tue, 20 Jul 2021 13:07:27 GMT

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

Re: nf_conntrack_timestamp not found

prashant_chopad — Tue, 27 Jul 2021 14:35:59 GMT

@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

Re: nf_conntrack_timestamp not found

Bio_TICFSL — Wed, 28 Jul 2021 13:18:02 GMT

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

Re: nf_conntrack_timestamp not found

prashant_chopad — Wed, 28 Jul 2021 13:59:11 GMT

@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

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