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bpf: don't attempt to load LPM_TRIE on < 4.14

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Test: TreeHugger
Bug: 394212739
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ia71951ef1a34eeeb30097de0b9d3ddb821f7e72f
This commit is contained in:
Maciej Żenczykowski 2025-02-03 22:04:26 -08:00
commit 8701983198
1 changed files with 6 additions and 0 deletions
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6
bpf/loader/NetBpfLoad.cpp
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@ -729,6 +729,12 @@ static int createMaps(const char* elfPath, ifstream& elfFile, vector<unique_fd>&
}
enum bpf_map_type type = md[i].type;
if (type == BPF_MAP_TYPE_LPM_TRIE && !isAtLeastKernelVersion(4, 14, 0)) {
// On Linux Kernels older than 4.14 this map type doesn't exist - autoskip.
ALOGD("skipping LPM_TRIE map %s - requires kver 4.14+", mapNames[i].c_str());
mapFds.push_back(unique_fd());
continue;
}
if (type == BPF_MAP_TYPE_DEVMAP && !isAtLeastKernelVersion(4, 14, 0)) {
// On Linux Kernels older than 4.14 this map type doesn't exist, but it can kind
// of be approximated: ARRAY has the same userspace api, though it is not usable