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NetBpfLoad: Add method to pin maps loaded by libbpf

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Bug: 428792764
Flag: EXEMPT no-op
Test: TH
Change-Id: Ifd66cda409f738f721e370b884931627f70d0db7
This commit is contained in:
Motomu Utsumi 2025-07-23 12:32:08 +09:00
commit cd5bdf5382
1 changed files with 33 additions and 0 deletions
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33
bpf/loader/NetBpfLoad.cpp
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@ -1483,6 +1483,39 @@ __unused static int prepareLoadProgs(const struct bpf_object* obj, const vector<
return 0;
}
__unused static int pinMaps(const char* const elfPath, const struct bpf_object* obj,
const vector<struct bpf_map_def>& md, const vector<string>& mapNames,
const char* const prefix) {
int ret;
string objName = pathToObjName(string(elfPath));
for (int i = 0; i < (int)mapNames.size(); i++) {
struct bpf_map* m = bpf_object__find_map_by_name(obj, mapNames[i].c_str());
if (!m) {
ALOGE("bpf_object does not contain map: %s", mapNames[i].c_str());
return -1;
}
// This map was skipped
if (!bpf_map__autocreate(m)) continue;
domain pin_subdir = getDomainFromPinSubdir(md[i].pin_subdir);
if (specified(pin_subdir)) {
ALOGE("map %s pin_subdir [%-32s] -> %d -> '%s'", mapNames[i].c_str(), md[i].pin_subdir,
static_cast<int>(pin_subdir), lookupPinSubdir(pin_subdir));
return -1;
}
string mapPinLoc = buildMapPinLoc(pin_subdir, prefix, md[i], objName, mapNames[i]);
if (access(mapPinLoc.c_str(), F_OK) == 0) {
ALOGE("Reusing map is not supported: %s", mapNames[i].c_str());
return -1;
}
ret = pinMap(bpf_map__fd(m), mapNames[i], md[i], objName, mapPinLoc);
if (ret) return ret;
}
return 0;
}
int loadProg(const char* const elfPath, const unsigned int bpfloader_ver,
const char* const prefix) {
vector<char> license;