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selftests/net: report etf errors correctly

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The ETF qdisc can queue skbs that it could not pace on the errqueue.

Address a few issues in the selftest

- recv buffer size was too small, and incorrectly calculated
- compared errno to ee_code instead of ee_errno
- missed invalid request error type

v2:
  - fix a few checkpatch --strict indentation warnings

Fixes: ea6a547669 ("selftests/net: make so_txtime more robust to timer variance")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Willem de Bruijn 2020-06-18 12:40:43 -04:00 committed by David S. Miller
parent 5948378b26
commit ca8826095e
1 changed files with 26 additions and 7 deletions
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33
tools/testing/selftests/net/so_txtime.c
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@ -15,8 +15,9 @@
#include <inttypes.h>
#include <linux/net_tstamp.h>
#include <linux/errqueue.h>
#include <linux/if_ether.h>
#include <linux/ipv6.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
@ -140,8 +141,8 @@ static void do_recv_errqueue_timeout(int fdt)
{
char control[CMSG_SPACE(sizeof(struct sock_extended_err)) +
CMSG_SPACE(sizeof(struct sockaddr_in6))] = {0};
char data[sizeof(struct ipv6hdr) +
sizeof(struct tcphdr) + 1];
char data[sizeof(struct ethhdr) + sizeof(struct ipv6hdr) +
sizeof(struct udphdr) + 1];
struct sock_extended_err *err;
struct msghdr msg = {0};
struct iovec iov = {0};
@ -159,6 +160,8 @@ static void do_recv_errqueue_timeout(int fdt)
msg.msg_controllen = sizeof(control);
while (1) {
const char *reason;
ret = recvmsg(fdt, &msg, MSG_ERRQUEUE);
if (ret == -1 && errno == EAGAIN)
break;
@ -176,14 +179,30 @@ static void do_recv_errqueue_timeout(int fdt)
err = (struct sock_extended_err *)CMSG_DATA(cm);
if (err->ee_origin != SO_EE_ORIGIN_TXTIME)
error(1, 0, "errqueue: origin 0x%x\n", err->ee_origin);
if (err->ee_code != ECANCELED)
error(1, 0, "errqueue: code 0x%x\n", err->ee_code);
switch (err->ee_errno) {
case ECANCELED:
if (err->ee_code != SO_EE_CODE_TXTIME_MISSED)
error(1, 0, "errqueue: unknown ECANCELED %u\n",
err->ee_code);
reason = "missed txtime";
break;
case EINVAL:
if (err->ee_code != SO_EE_CODE_TXTIME_INVALID_PARAM)
error(1, 0, "errqueue: unknown EINVAL %u\n",
err->ee_code);
reason = "invalid txtime";
break;
default:
error(1, 0, "errqueue: errno %u code %u\n",
err->ee_errno, err->ee_code);
};
tstamp = ((int64_t) err->ee_data) << 32 | err->ee_info;
tstamp -= (int64_t) glob_tstart;
tstamp /= 1000 * 1000;
fprintf(stderr, "send: pkt %c at %" PRId64 "ms dropped\n",
data[ret - 1], tstamp);
fprintf(stderr, "send: pkt %c at %" PRId64 "ms dropped: %s\n",
data[ret - 1], tstamp, reason);
msg.msg_flags = 0;
msg.msg_controllen = sizeof(control);