I'm using ftrace to trace ip_local_out() in kernel 5.4.20. I'm sure ip_local_out() is available to trace: /sys/kernel/debug/tracing # cat available_filter_funct
uwamp
urlsessionwebsockettask
firefox-addon
rowdatabound
jfuzzylogic
unirest
siemens
qgis
shoutem
endianness
secure-random
qvideowidget
pi4j
wikidata-query-service
hololens-emulator
hbase
tippecanoe
dataguard
normalize-css
varchar
google-awareness
tensorflow-xla
native-code
shutil
default.png
boxlayout
artifacts
autoresize
pgmpy
jsr