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Packets sent by rmnet to the real device have variable MAP header lengths based on the data format configured. This patch adds checks to ensure that the real device MTU is sufficient to transmit the MAP packet comprising of the MAP header and the IP packet. This check is enforced when rmnet devices are created and updated and during MTU updates of both the rmnet and real device. Additionally, rmnet devices now have a default MTU configured which accounts for the real device MTU and the headroom based on the data format. Signed-off-by: Sean Tranchetti <stranche@codeaurora.org> Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Tested-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
25 lines
943 B
C
25 lines
943 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2013-2017, The Linux Foundation. All rights reserved.
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*
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* RMNET Data Virtual Network Device APIs
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*/
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#ifndef _RMNET_VND_H_
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#define _RMNET_VND_H_
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int rmnet_vnd_do_flow_control(struct net_device *dev, int enable);
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int rmnet_vnd_newlink(u8 id, struct net_device *rmnet_dev,
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struct rmnet_port *port,
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struct net_device *real_dev,
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struct rmnet_endpoint *ep,
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struct netlink_ext_ack *extack);
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int rmnet_vnd_dellink(u8 id, struct rmnet_port *port,
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struct rmnet_endpoint *ep);
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void rmnet_vnd_rx_fixup(struct sk_buff *skb, struct net_device *dev);
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void rmnet_vnd_tx_fixup(struct sk_buff *skb, struct net_device *dev);
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void rmnet_vnd_setup(struct net_device *dev);
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int rmnet_vnd_validate_real_dev_mtu(struct net_device *real_dev);
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int rmnet_vnd_update_dev_mtu(struct rmnet_port *port,
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struct net_device *real_dev);
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#endif /* _RMNET_VND_H_ */
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