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| author |   Nicolas Dichtel <nicolas.dichtel@6wind.com> | 2021-06-08 16:59:51 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2021-06-08 11:46:23 -0700 |
| commit | 9bb392f62447d73cc7dd7562413a2cd9104c82f8 (patch) | |
| tree | 2c80de848327c06d5751986218015bbca32387c7 /net/unix/af_unix.c | |
| parent | net: appletalk: fix the usage of preposition (diff) | |
| download | wireguard-linux-9bb392f62447d73cc7dd7562413a2cd9104c82f8.tar.xz wireguard-linux-9bb392f62447d73cc7dd7562413a2cd9104c82f8.zip | |
vrf: fix maximum MTU
My initial goal was to fix the default MTU, which is set to 65536, ie above
the maximum defined in the driver: 65535 (ETH_MAX_MTU).
In fact, it's seems more consistent, wrt min_mtu, to set the max_mtu to
IP6_MAX_MTU (65535 + sizeof(struct ipv6hdr)) and use it by default.
Let's also, for consistency, set the mtu in vrf_setup(). This function
calls ether_setup(), which set the mtu to 1500. Thus, the whole mtu config
is done in the same function.
Before the patch:
$ ip link add blue type vrf table 1234
$ ip link list blue
9: blue: <NOARP,MASTER> mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ether fa:f5:27:70:24:2a brd ff:ff:ff:ff:ff:ff
$ ip link set dev blue mtu 65535
$ ip link set dev blue mtu 65536
Error: mtu greater than device maximum.
Fixes: 5055376a3b44 ("net: vrf: Fix ping failed when vrf mtu is set to 0")
CC: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions