Some ebpf code cannot be loaded on too old kernels.
Sometimes we want a different - more advanced - version of an ebpf program
to be loaded on a newer kernel.
Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I9e93e7246951916e6d60544575337a7a19c82886
(while at it also remove 3 spurious this-> prefixes)
Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I2419926b555734d7f5e052fb9e0686c52bdb32d0
This is backwards. netd should require them,
and they should require bpfloader, not the other way round.
Test: build, atest, ls -lZ /sys/fs/bpf /system/etc/bpf still shows all maps/progs
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Iecd95cb69eaad97979af163e63489309826546f6
Include time_in_state.o in device builds, causing time in state
programs & maps to be loaded.
Bug: 138317993
Test: make bpfloader; check that time_in_state.o is built
Change-Id: I4849bda645d7a02e3f889068987a79ce3f78d138
Signed-off-by: Connor O'Brien <connoro@google.com>
This is to allow fixing a broken OffloadUtils netd test, but this will
also be useful for future support to make programs per kernel version.
We make the string versions of the enum more readable, because there
is exactly one user:
adb shell dumpsys netd | egrep -i bpf
BPF module status: enabled
BPF support level: Extended [4.14]
...
Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I843bd7355703a78acc8343ca7f647ce9366927eb
Unlike maps, BPF programs currently have no natural place to declare
metadata like their desired owner & group. Add a bpf_prog_def struct
to allow setting these, located in a new "progs" section, and update
bpfloader to chown pinned programs appropriately based on this
information.
Add a #DEFINE_BPF_PROG macro to simplify adding this data for
programs. The struct name is the name of the corresponding function
with "_def" appended, which bpfloader uses to correlate a bpf_map_def
with the correct program.
Also have bpfloader set mode to 0440 for all programs, since only read
access should ever be needed
Bug: 149434314
Test: load a program that uses DEFINE_BPF_PROG and check that owner &
group are set as expected
Change-Id: I914c355f114368fe53de2c7f272d877463cba461
Signed-off-by: Connor O'Brien <connoro@google.com>
so that it can change the uid/gid of pinned bpf progs and maps
Test: build, atest
Bug: 149434314
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Id23f9caaddf620d4e99d970523f0a9768826e0d7
(being moved from //system/netd/tests/bpf_base_test.cpp)
Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I7a38eff6d86a1bcd6dde193fd360d198bd57a900
(we don't want to truncate this output, since it can be very useful
for debugging failures)
Test: builds, more useful ebpf load failure logs
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I817853f33b7f59296a041fb0d26ca3ae502b29da
Per Bernie: "in C++, inline implies internal linkage, you can drop static"
Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I139af1d826d4982a1480fbee433fd9a743509786
