Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::tcpmib.InSegs - Count an incoming tcp segment
SYNOPSIS
tcpmib.InSegs
VALUES
sk
pointer to the struct sock being acted on
op
value to be added to the counter (default value of 1)
DESCRIPTION
The packet pointed to by skb is filtered by the function tcpmib_filter_key (or ipmib_filter_key for tcp
v4). If the packet passes the filter is is counted in the global InSegs (equivalent to SNMP's MIB
TCP_MIB_INSEGS)
SystemTap Tapset Reference March 2016 PROBE::TCPMIB.INSE(3stap)