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
scrypt
tablerow
lpsolve
hotswapagent
elevation
platform-specific
crate
express-graphql
r2dbc-postgresql
silentpush
pgo
safe-stack
powerset
smarty-plugins
finddialog
amp-img
dialect
visual-studio-extensions
g++4.9
nv12-nv21
khan-academy
css-counter
terminal.app
network-traffic
angularjs-compile
swift-structs
pdblp
backquote
httpinvoker
pushprovisioning