Tested with VDSL on TP-Link WD8970, I see full 1500-byte PPP data
frames, which end up being 1526 byte Ethernet frames (including
Ethernet+VLAN headers) on the wire.
Fixes: FS#210
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
static unsigned int ptm_poll(int, unsigned int);
static int ptm_napi_poll(struct napi_struct *, int);
static int ptm_hard_start_xmit(struct sk_buff *, struct net_device *);
static unsigned int ptm_poll(int, unsigned int);
static int ptm_napi_poll(struct napi_struct *, int);
static int ptm_hard_start_xmit(struct sk_buff *, struct net_device *);
+static int ptm_change_mtu(struct net_device *, int);
static int ptm_ioctl(struct net_device *, struct ifreq *, int);
static void ptm_tx_timeout(struct net_device *);
static int ptm_ioctl(struct net_device *, struct ifreq *, int);
static void ptm_tx_timeout(struct net_device *);
.ndo_start_xmit = ptm_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
.ndo_start_xmit = ptm_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
- .ndo_change_mtu = eth_change_mtu,
+ .ndo_change_mtu = ptm_change_mtu,
.ndo_do_ioctl = ptm_ioctl,
.ndo_tx_timeout = ptm_tx_timeout,
};
.ndo_do_ioctl = ptm_ioctl,
.ndo_tx_timeout = ptm_tx_timeout,
};
+static int ptm_change_mtu(struct net_device *dev, int mtu)
+{
+ /* Allow up to 1508 bytes, for RFC4638 */
+ if (mtu < 68 || mtu > ETH_DATA_LEN + 8)
+ return -EINVAL;
+ dev->mtu = mtu;
+ return 0;
+}
+
static int ptm_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
int ndev;
static int ptm_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
int ndev;
static unsigned int ptm_poll(int, unsigned int);
static int ptm_napi_poll(struct napi_struct *, int);
static int ptm_hard_start_xmit(struct sk_buff *, struct net_device *);
static unsigned int ptm_poll(int, unsigned int);
static int ptm_napi_poll(struct napi_struct *, int);
static int ptm_hard_start_xmit(struct sk_buff *, struct net_device *);
+static int ptm_change_mtu(struct net_device *, int);
static int ptm_ioctl(struct net_device *, struct ifreq *, int);
static void ptm_tx_timeout(struct net_device *);
static int ptm_ioctl(struct net_device *, struct ifreq *, int);
static void ptm_tx_timeout(struct net_device *);
.ndo_start_xmit = ptm_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
.ndo_start_xmit = ptm_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
- .ndo_change_mtu = eth_change_mtu,
+ .ndo_change_mtu = ptm_change_mtu,
.ndo_do_ioctl = ptm_ioctl,
.ndo_tx_timeout = ptm_tx_timeout,
};
.ndo_do_ioctl = ptm_ioctl,
.ndo_tx_timeout = ptm_tx_timeout,
};
+static int ptm_change_mtu(struct net_device *dev, int mtu)
+{
+ /* Allow up to 1508 bytes, for RFC4638 */
+ if (mtu < 68 || mtu > ETH_DATA_LEN + 8)
+ return -EINVAL;
+ dev->mtu = mtu;
+ return 0;
+}
+
static int ptm_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
ASSERT(dev == g_net_dev[0], "incorrect device");
static int ptm_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
ASSERT(dev == g_net_dev[0], "incorrect device");