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require a bpf program definition am: 5c79165bb2

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Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/2172788

Change-Id: Ie753012c419171767dc075b442a3431a0fbf47a2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
This commit is contained in:
Maciej Żenczykowski 2022-08-08 18:02:32 +00:00 committed by Automerger Merge Worker
commit 28a735510a
1 changed files with 28 additions and 28 deletions
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56
libbpf_android/Loader.cpp
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@ -995,33 +995,35 @@ static int loadCodeSections(const char* elfPath, vector<codeSection>& cs, const
unsigned kvers = kernelVersion();
int ret, fd;
if (!kvers) return -1;
if (!kvers) {
ALOGE("unable to get kernel version");
return -EINVAL;
}
string objName = pathToObjName(string(elfPath));
for (int i = 0; i < (int)cs.size(); i++) {
string name = cs[i].name;
unsigned bpfMinVer = DEFAULT_BPFLOADER_MIN_VER; // v0.0
unsigned bpfMaxVer = DEFAULT_BPFLOADER_MAX_VER; // v1.0
domain selinux_context = domain::unspecified;
domain pin_subdir = domain::unspecified;
if (cs[i].prog_def.has_value()) {
unsigned min_kver = cs[i].prog_def->min_kver;
unsigned max_kver = cs[i].prog_def->max_kver;
ALOGD("cs[%d].name:%s min_kver:%x .max_kver:%x (kvers:%x)", i, name.c_str(), min_kver,
max_kver, kvers);
if (kvers < min_kver) continue;
if (kvers >= max_kver) continue;
bpfMinVer = cs[i].prog_def->bpfloader_min_ver;
bpfMaxVer = cs[i].prog_def->bpfloader_max_ver;
selinux_context = getDomainFromSelinuxContext(cs[i].prog_def->selinux_context);
pin_subdir = getDomainFromPinSubdir(cs[i].prog_def->pin_subdir);
// Note: make sure to only check for unrecognized *after* verifying bpfloader
// version limits include this bpfloader's version.
if (!cs[i].prog_def.has_value()) {
ALOGE("[%d] '%s' missing program definition! bad bpf.o build?", i, name.c_str());
return -EINVAL;
}
unsigned min_kver = cs[i].prog_def->min_kver;
unsigned max_kver = cs[i].prog_def->max_kver;
ALOGD("cs[%d].name:%s min_kver:%x .max_kver:%x (kvers:%x)", i, name.c_str(), min_kver,
max_kver, kvers);
if (kvers < min_kver) continue;
if (kvers >= max_kver) continue;
unsigned bpfMinVer = cs[i].prog_def->bpfloader_min_ver;
unsigned bpfMaxVer = cs[i].prog_def->bpfloader_max_ver;
domain selinux_context = getDomainFromSelinuxContext(cs[i].prog_def->selinux_context);
domain pin_subdir = getDomainFromPinSubdir(cs[i].prog_def->pin_subdir);
// Note: make sure to only check for unrecognized *after* verifying bpfloader
// version limits include this bpfloader's version.
ALOGD("cs[%d].name:%s requires bpfloader version [0x%05x,0x%05x)", i, name.c_str(),
bpfMinVer, bpfMaxVer);
if (BPFLOADER_VERSION < bpfMinVer) continue;
@ -1089,7 +1091,7 @@ static int loadCodeSections(const char* elfPath, vector<codeSection>& cs, const
for (const auto& line : lines) ALOGW("%s", line.c_str());
ALOGW("bpf_prog_load - END log_buf contents.");
if (cs[i].prog_def.has_value() && cs[i].prog_def->optional) {
if (cs[i].prog_def->optional) {
ALOGW("failed program is marked optional - continuing...");
continue;
}
@ -1130,14 +1132,12 @@ static int loadCodeSections(const char* elfPath, vector<codeSection>& cs, const
ALOGE("chmod %s 0440 -> [%d:%s]", progPinLoc.c_str(), err, strerror(err));
return -err;
}
if (cs[i].prog_def.has_value()) {
if (chown(progPinLoc.c_str(), (uid_t)cs[i].prog_def->uid,
(gid_t)cs[i].prog_def->gid)) {
int err = errno;
ALOGE("chown %s %d %d -> [%d:%s]", progPinLoc.c_str(), cs[i].prog_def->uid,
cs[i].prog_def->gid, err, strerror(err));
return -err;
}
if (chown(progPinLoc.c_str(), (uid_t)cs[i].prog_def->uid,
(gid_t)cs[i].prog_def->gid)) {
int err = errno;
ALOGE("chown %s %d %d -> [%d:%s]", progPinLoc.c_str(), cs[i].prog_def->uid,
cs[i].prog_def->gid, err, strerror(err));
return -err;
}
}