From: Oliver Hartkopp <socketcan@xxxxxxxxxxxx> Make use of new can_skb_get_data_len() helper. Add support for variable CANXL MTU using the new can_is_canxl_dev_mtu(). Acked-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx> Signed-off-by: Oliver Hartkopp <socketcan@xxxxxxxxxxxx> Link: https://lore.kernel.org/all/20220912170725.120748-7-socketcan@xxxxxxxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- drivers/net/can/vcan.c | 12 ++++++------ drivers/net/can/vxcan.c | 8 ++++---- include/linux/can/dev.h | 5 +++++ 3 files changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/net/can/vcan.c b/drivers/net/can/vcan.c index 36b6310a2e5b..285635c23443 100644 --- a/drivers/net/can/vcan.c +++ b/drivers/net/can/vcan.c @@ -71,11 +71,10 @@ MODULE_PARM_DESC(echo, "Echo sent frames (for testing). Default: 0 (Off)"); static void vcan_rx(struct sk_buff *skb, struct net_device *dev) { - struct canfd_frame *cfd = (struct canfd_frame *)skb->data; struct net_device_stats *stats = &dev->stats; stats->rx_packets++; - stats->rx_bytes += cfd->len; + stats->rx_bytes += can_skb_get_data_len(skb); skb->pkt_type = PACKET_BROADCAST; skb->dev = dev; @@ -86,14 +85,14 @@ static void vcan_rx(struct sk_buff *skb, struct net_device *dev) static netdev_tx_t vcan_tx(struct sk_buff *skb, struct net_device *dev) { - struct canfd_frame *cfd = (struct canfd_frame *)skb->data; struct net_device_stats *stats = &dev->stats; - int loop, len; + unsigned int len; + int loop; if (can_dropped_invalid_skb(dev, skb)) return NETDEV_TX_OK; - len = cfd->can_id & CAN_RTR_FLAG ? 0 : cfd->len; + len = can_skb_get_data_len(skb); stats->tx_packets++; stats->tx_bytes += len; @@ -137,7 +136,8 @@ static int vcan_change_mtu(struct net_device *dev, int new_mtu) if (dev->flags & IFF_UP) return -EBUSY; - if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU) + if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU && + !can_is_canxl_dev_mtu(new_mtu)) return -EINVAL; dev->mtu = new_mtu; diff --git a/drivers/net/can/vxcan.c b/drivers/net/can/vxcan.c index cffd107d8b28..26a472d2ea58 100644 --- a/drivers/net/can/vxcan.c +++ b/drivers/net/can/vxcan.c @@ -38,10 +38,9 @@ static netdev_tx_t vxcan_xmit(struct sk_buff *oskb, struct net_device *dev) { struct vxcan_priv *priv = netdev_priv(dev); struct net_device *peer; - struct canfd_frame *cfd = (struct canfd_frame *)oskb->data; struct net_device_stats *peerstats, *srcstats = &dev->stats; struct sk_buff *skb; - u8 len; + unsigned int len; if (can_dropped_invalid_skb(dev, oskb)) return NETDEV_TX_OK; @@ -70,7 +69,7 @@ static netdev_tx_t vxcan_xmit(struct sk_buff *oskb, struct net_device *dev) skb->dev = peer; skb->ip_summed = CHECKSUM_UNNECESSARY; - len = cfd->can_id & CAN_RTR_FLAG ? 0 : cfd->len; + len = can_skb_get_data_len(skb); if (netif_rx(skb) == NET_RX_SUCCESS) { srcstats->tx_packets++; srcstats->tx_bytes += len; @@ -132,7 +131,8 @@ static int vxcan_change_mtu(struct net_device *dev, int new_mtu) if (dev->flags & IFF_UP) return -EBUSY; - if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU) + if (new_mtu != CAN_MTU && new_mtu != CANFD_MTU && + !can_is_canxl_dev_mtu(new_mtu)) return -EINVAL; dev->mtu = new_mtu; diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h index c3e50e537e39..58f5431a5559 100644 --- a/include/linux/can/dev.h +++ b/include/linux/can/dev.h @@ -147,6 +147,11 @@ static inline u32 can_get_static_ctrlmode(struct can_priv *priv) return priv->ctrlmode & ~priv->ctrlmode_supported; } +static inline bool can_is_canxl_dev_mtu(unsigned int mtu) +{ + return (mtu >= CANXL_MIN_MTU && mtu <= CANXL_MAX_MTU); +} + void can_setup(struct net_device *dev); struct net_device *alloc_candev_mqs(int sizeof_priv, unsigned int echo_skb_max, -- 2.35.1
