b7f5eb6ba2
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>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2013-2014, 2016-2018 The Linux Foundation. All rights reserved.
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*
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* RMNET Data configuration engine
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*/
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#include <linux/skbuff.h>
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#include <net/gro_cells.h>
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#ifndef _RMNET_CONFIG_H_
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#define _RMNET_CONFIG_H_
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#define RMNET_MAX_LOGICAL_EP 255
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struct rmnet_endpoint {
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u8 mux_id;
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struct net_device *egress_dev;
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struct hlist_node hlnode;
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};
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/* One instance of this structure is instantiated for each real_dev associated
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* with rmnet.
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*/
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struct rmnet_port {
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struct net_device *dev;
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u32 data_format;
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u8 nr_rmnet_devs;
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u8 rmnet_mode;
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struct hlist_head muxed_ep[RMNET_MAX_LOGICAL_EP];
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struct net_device *bridge_ep;
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struct net_device *rmnet_dev;
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};
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extern struct rtnl_link_ops rmnet_link_ops;
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struct rmnet_vnd_stats {
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u64 rx_pkts;
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u64 rx_bytes;
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u64 tx_pkts;
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u64 tx_bytes;
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u32 tx_drops;
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};
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struct rmnet_pcpu_stats {
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struct rmnet_vnd_stats stats;
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struct u64_stats_sync syncp;
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};
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struct rmnet_priv_stats {
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u64 csum_ok;
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u64 csum_valid_unset;
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u64 csum_validation_failed;
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u64 csum_err_bad_buffer;
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u64 csum_err_invalid_ip_version;
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u64 csum_err_invalid_transport;
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u64 csum_fragmented_pkt;
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u64 csum_skipped;
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u64 csum_sw;
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};
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struct rmnet_priv {
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u8 mux_id;
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struct net_device *real_dev;
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struct rmnet_pcpu_stats __percpu *pcpu_stats;
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struct gro_cells gro_cells;
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struct rmnet_priv_stats stats;
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};
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struct rmnet_port *rmnet_get_port_rcu(struct net_device *real_dev);
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struct rmnet_endpoint *rmnet_get_endpoint(struct rmnet_port *port, u8 mux_id);
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int rmnet_add_bridge(struct net_device *rmnet_dev,
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struct net_device *slave_dev,
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struct netlink_ext_ack *extack);
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int rmnet_del_bridge(struct net_device *rmnet_dev,
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struct net_device *slave_dev);
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struct rmnet_port*
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rmnet_get_port_rtnl(const struct net_device *real_dev);
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#endif /* _RMNET_CONFIG_H_ */
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