Daniel Borkmann f3515b5d0b bpf: provide a generic macro for percpu values for selftests ... To overcome bugs as described and fixed in 89087c456f ("bpf: Fix values type used in test_maps"), provide a generic BPF_DECLARE_PERCPU() and bpf_percpu() accessor macro for all percpu map values used in tests. Declaring variables works as follows (also works for structs): BPF_DECLARE_PERCPU(uint32_t, my_value); They can then be accessed normally as uint32_t type through: bpf_percpu(my_value, <cpu_nr>) For example: bpf_percpu(my_value, 0)++; Implicitly, we make sure that the passed type is allocated and aligned by gcc at least on a 8-byte boundary, so that it works together with the map lookup/update syscall for percpu maps. We use it as a usage example in test_maps, so that others are free to adapt this into their code when necessary. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-04-28 15:48:15 -04:00
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.gitignore	bpf: Add test_tag to .gitignore	2017-02-10 15:56:08 -05:00
bpf_util.h	bpf: provide a generic macro for percpu values for selftests	2017-04-28 15:48:15 -04:00
config	bpf: add initial suite for selftests	2016-10-18 11:35:55 -04:00
Makefile	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-04-06 08:24:51 -07:00
test_iptunnel_common.h	selftests/bpf: add a test for basic XDP functionality	2017-04-01 12:45:57 -07:00
test_kmod.sh	selftests: do not require bash to run bpf tests	2017-01-05 13:19:47 -07:00
test_l4lb.c	bpf: fix _htons occurences in test_progs	2017-04-28 15:48:15 -04:00
test_lpm_map.c	bpf: Remove bpf_sys.h from selftests	2017-02-10 15:56:08 -05:00
test_lru_map.c	bpf: lru: Lower the PERCPU_NR_SCANS from 16 to 4	2017-04-17 13:55:52 -04:00
test_maps.c	bpf: provide a generic macro for percpu values for selftests	2017-04-28 15:48:15 -04:00
test_pkt_access.c	bpf: fix _htons occurences in test_progs	2017-04-28 15:48:15 -04:00
test_progs.c	bpf: fix _htons occurences in test_progs	2017-04-28 15:48:15 -04:00
test_tag.c	bpf: Remove bpf_sys.h from selftests	2017-02-10 15:56:08 -05:00
test_verifier.c	bpf: add various test cases to verifier selftests	2017-04-28 15:48:14 -04:00
test_xdp.c	selftests/bpf: add a test for basic XDP functionality	2017-04-01 12:45:57 -07:00