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enable NETLINK_EXT_ACK extended error reporting

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(we don't yet do anything with it, but at least in strace we should
now see more detailed errors from the kernel)

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I6a34a0e7e866bbde41daef23870ad90dceee6ded
This commit is contained in:
Maciej Żenczykowski 2022-06-09 23:27:32 +00:00
commit e8dceddeec
1 changed files with 6 additions and 0 deletions
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6
staticlibs/native/tcutils/tcutils.cpp
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@ -386,6 +386,12 @@ int sendAndProcessNetlinkResponse(const void *req, int len) {
return -error;
}
if (setsockopt(fd, SOL_NETLINK, NETLINK_EXT_ACK, &on, sizeof(on))) {
int error = errno;
ALOGW("setsockopt(fd, SOL_NETLINK, NETLINK_EXT_ACK, 1): %d", error);
// will fail on 4.9 kernels so don't: return -error;
}
// this is needed to get valid strace netlink parsing, it allocates the pid
if (bind(fd, (const struct sockaddr *)&KERNEL_NLADDR,
sizeof(KERNEL_NLADDR))) {