On 02/22/2019 02:19 PM, Alban Crequy wrote: > From: Alban Crequy <al...@kinvolk.io> > > trie_delete_elem() was deleting an entry even though it was not matching > if the prefixlen was correct. This patch adds a check on matchlen. > > Reproducer: > > $ sudo bpftool map create /sys/fs/bpf/mylpm type lpm_trie key 8 value 1 > entries 128 name mylpm flags 1 > $ sudo bpftool map update pinned /sys/fs/bpf/mylpm key hex 10 00 00 00 aa bb > cc dd value hex 01 > $ sudo bpftool map dump pinned /sys/fs/bpf/mylpm > key: 10 00 00 00 aa bb cc dd value: 01 > Found 1 element > $ sudo bpftool map delete pinned /sys/fs/bpf/mylpm key hex 10 00 00 00 ff ff > ff ff > $ echo $? > 0 > $ sudo bpftool map dump pinned /sys/fs/bpf/mylpm > Found 0 elements > > A similar reproducer is added in the selftests. > > Without the patch: > > $ sudo ./tools/testing/selftests/bpf/test_lpm_map > test_lpm_map: test_lpm_map.c:485: test_lpm_delete: Assertion > `bpf_map_delete_elem(map_fd, key) == -1 && errno == ENOENT' failed. > Aborted > > With the patch: test_lpm_map runs without errors. > > Fixes: e454cf595853 ("bpf: Implement map_delete_elem for > BPF_MAP_TYPE_LPM_TRIE") > Cc: Craig Gallek <kr...@google.com> > Signed-off-by: Alban Crequy <al...@kinvolk.io>
Applied, thanks!