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selftests/xsk: add timeout for Tx thread

Browse source 
Add a timeout for the transmission thread. If packets are not
completed properly, for some reason, the test harness would previously
get stuck forever in a while loop. But with this patch, this timeout
will trigger, flag the test as a failure, and continue with the next
test.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/r/20230914084900.492-3-magnus.karlsson@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Magnus Karlsson 2023-09-14 10:48:49 +02:00 committed by Alexei Starovoitov
parent 2d2712caf4
commit 64370d7c8a
1 changed files with 22 additions and 4 deletions
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26
tools/testing/selftests/bpf/xskxceiver.c
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@ -1216,10 +1216,29 @@ static int __send_pkts(struct ifobject *ifobject, struct pollfd *fds, bool timeo
return TEST_CONTINUE;
}
static void wait_for_tx_completion(struct xsk_socket_info *xsk)
static int wait_for_tx_completion(struct xsk_socket_info *xsk)
{
while (xsk->outstanding_tx)
struct timeval tv_end, tv_now, tv_timeout = {THREAD_TMOUT, 0};
int ret;
ret = gettimeofday(&tv_now, NULL);
if (ret)
exit_with_error(errno);
timeradd(&tv_now, &tv_timeout, &tv_end);
while (xsk->outstanding_tx) {
ret = gettimeofday(&tv_now, NULL);
if (ret)
exit_with_error(errno);
if (timercmp(&tv_now, &tv_end, >)) {
ksft_print_msg("ERROR: [%s] Transmission loop timed out\n", __func__);
return TEST_FAILURE;
}
complete_pkts(xsk, BATCH_SIZE);
}
return TEST_PASS;
}
static int send_pkts(struct test_spec *test, struct ifobject *ifobject)
@ -1242,8 +1261,7 @@ static int send_pkts(struct test_spec *test, struct ifobject *ifobject)
return ret;
}
wait_for_tx_completion(ifobject->xsk);
return TEST_PASS;
return wait_for_tx_completion(ifobject->xsk);
}
static int get_xsk_stats(struct xsk_socket *xsk, struct xdp_statistics *stats)