Gilad Reti <gilad.reti@xxxxxxxxx> writes: > On Mon, Feb 8, 2021 at 1:42 PM Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote: >> >> Gilad Reti <gilad.reti@xxxxxxxxx> writes: >> >> > Also, is there a way to set the pin path to all maps/programs at once? >> > For example, bpf_object__pin_maps pins all maps at a specific path, >> > but as far as I was able to find there is no similar function to set >> > the pin path for all maps only (without pinning) so that at loading >> > time libbpf will try to reuse all maps. The only way to achieve a >> > complete reuse of all maps that I could find is to "reverse engineer" >> > libbpf's pin path generation algorithm (i.e. <path>/<map_name>) and >> > set the pin path on each map before load. >> >> You can set the 'pinning' attribute in the map definition - add >> '__uint(pinning, LIBBPF_PIN_BY_NAME);' to the map struct. By default >> this will pin beneath /sys/fs/bpf, but you can customise that by setting >> the pin_root_path attribute in bpf_object_open_opts. > > Yes, I am familiar with that feature, but it has some downsides: > 1. I need to set it manually on every map (and in cases that I have > only the compiled object file that would be hard). > 2. It only works for bpf maps and not bpf programs. > 3. It only works for bpf maps that are defined explicitly in the bpf > code and not for implicit (inner) bpf maps (bss, rodata, etc). Ah, right. Well, other than that I don't think there's a way to set pin paths in bulk, other than by manually iterating and setting them one at a time. But, erm, can't you just do that? :) -Toke
