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
phobos
gwt2
google-cloud-node
price
houghlines
minimization
idml
problem-steps-recorder
integral
pine-script-v4
shift-register
malli
netcdf4
mobile-application
jbutton
notnull
tframe
pytz
pos
ngen
flutter-modular
optional-parameters
git-tag
angular-language-service
dump
angularjs-templates
google-chrome-app
libigl
safari-push-notifications
pca3d