On 1/29/20 4:54 AM, Eric Sage wrote:
At Facebook we use tail calls to jump between our firewall filters and
our L4LB. This is a program I wrote to estimate per program performance
by swapping out the entries in the program array with interceptors that
take measurements and then jump to the original entries.
I found the sample programs to be invaluable in understanding how to use
the libbpf API (as well as the test env from the xdp-tutorial repo for
testing), and want to return the favor. I am currently working on
my next iteration that uses fentry/fexit to be less invasive,
but I thought it was an interesting PoC of what you can do with program
arrays.
Signed-off-by: Eric Sage <redacted>
Now that bpf-next is back open, this needs a rebase for proceeding to get merged.
Thanks,
Daniel