FUNCTION::LINUXMIB\_F(3stap) SNMP Information Tapset FUNCTION::LINUXMIB\_F(3stap)

# [NAME](#NAME)

function::linuxmib\_filter\_key - Default filter function for linuxmib.* probes

# [SYNOPSIS](#SYNOPSIS)

```


    linuxmib_filter_key:long(sk:long,op:long)
```

# [ARGUMENTS](#ARGUMENTS)

*sk*

pointer to the struct sock

*op*

value to be counted if *sk* passes the filter

# [DESCRIPTION](#DESCRIPTION)

This function is a default filter function. The user can replace this function with their own. The user-supplied filter function returns an index key based on the values in *sk*. A return value of 0 means this particular *sk* should be not be counted.

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::linuxmib-filter-default*(3stap)](/man/enterprise-packages/systemtap/tapset::linuxmib-filter-default.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: function::linuxmib_filter_key(3stap) from systemtap 5.6-r1 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git