diff options
| author | Sven Eckelmann <sven@narfation.org> | 2023-07-19 11:01:15 +0300 |
|---|---|---|
| committer | Simon Wunderlich <sw@simonwunderlich.de> | 2023-07-20 09:56:33 +0300 |
| commit | d8e42a2b0addf238be8b3b37dcd9795a5c1be459 (patch) | |
| tree | 7a924dee56384688c67262dd48691abbe62f5744 /net/batman-adv/soft-interface.c | |
| parent | c6a953cce8d0438391e6da48c8d0793d3fbfcfa6 (diff) | |
| download | linux-d8e42a2b0addf238be8b3b37dcd9795a5c1be459.tar.xz | |
batman-adv: Don't increase MTU when set by user
If the user set an MTU value, it usually means that there are special
requirements for the MTU. But if an interface gots activated, the MTU was
always recalculated and then the user set value was overwritten.
The only reason why this user set value has to be overwritten, is when the
MTU has to be decreased because batman-adv is not able to transfer packets
with the user specified size.
Fixes: c6c8fea29769 ("net: Add batman-adv meshing protocol")
Cc: stable@vger.kernel.org
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv/soft-interface.c')
| -rw-r--r-- | net/batman-adv/soft-interface.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index d3fdf82282af..85d00dc9ce32 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -153,11 +153,14 @@ static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) { + struct batadv_priv *bat_priv = netdev_priv(dev); + /* check ranges */ if (new_mtu < 68 || new_mtu > batadv_hardif_min_mtu(dev)) return -EINVAL; dev->mtu = new_mtu; + bat_priv->mtu_set_by_user = new_mtu; return 0; } |