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pktgen: Allow on loopback device

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When pktgen is used to measure the performance of dev_queue_xmit()
packet handling in the core, it is preferable to not hand down
packets to a low-level Ethernet driver as it would distort the
measurements.

Allow using pktgen on the loopback device, thus constraining
measurements to core code.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lukas Wunner 2020-03-10 11:49:46 +01:00 committed by David S. Miller
parent 62751b6808
commit 1e09e5818b
1 changed files with 2 additions and 2 deletions
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4
net/core/pktgen.c
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@ -2003,8 +2003,8 @@ static int pktgen_setup_dev(const struct pktgen_net *pn,
return -ENODEV;
}
if (odev->type != ARPHRD_ETHER) {
pr_err("not an ethernet device: \"%s\"\n", ifname);
if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) {
pr_err("not an ethernet or loopback device: \"%s\"\n", ifname);
err = -EINVAL;
} else if (!netif_running(odev)) {
pr_err("device is down: \"%s\"\n", ifname);