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authorDavid S. Miller <davem@davemloft.net>2017-05-10 11:38:07 -0700
committerDavid S. Miller <davem@davemloft.net>2017-05-11 14:19:00 -0400
commite07b98d9bffe410019dfcf62c3428d4a96c56a2c (patch)
tree52a3aede39b1bac6a409586bcdd272d9aa958868 /tools/build/feature
parentc5fc9692d101d1318b0f53f9f691cd88ac029317 (diff)
downloadlinux-e07b98d9bffe410019dfcf62c3428d4a96c56a2c.tar.bz2
bpf: Add strict alignment flag for BPF_PROG_LOAD.
Add a new field, "prog_flags", and an initial flag value BPF_F_STRICT_ALIGNMENT. When set, the verifier will enforce strict pointer alignment regardless of the setting of CONFIG_EFFICIENT_UNALIGNED_ACCESS. The verifier, in this mode, will also use a fixed value of "2" in place of NET_IP_ALIGN. This facilitates test cases that will exercise and validate this part of the verifier even when run on architectures where alignment doesn't matter. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools/build/feature')
-rw-r--r--tools/build/feature/test-bpf.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/build/feature/test-bpf.c b/tools/build/feature/test-bpf.c
index ebc6dceddb58..7598361ef1f1 100644
--- a/tools/build/feature/test-bpf.c
+++ b/tools/build/feature/test-bpf.c
@@ -29,6 +29,7 @@ int main(void)
attr.log_size = 0;
attr.log_level = 0;
attr.kern_version = 0;
+ attr.prog_flags = 0;
/*
* Test existence of __NR_bpf and BPF_PROG_LOAD.