mirror of
https://github.com/Ysurac/openmptcprouter-feeds.git
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456 lines
17 KiB
C
456 lines
17 KiB
C
/*
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* sfe_ipv4.h
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* Shortcut forwarding engine header file for IPv4.
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*
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* Copyright (c) 2013-2016, 2019-2020, The Linux Foundation. All rights reserved.
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* Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __SFE_IPV4_H
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#define __SFE_IPV4_H
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#define SFE_IPV4_DSCP_MASK 0x3
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#define SFE_IPV4_DSCP_SHIFT 2
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#include <linux/version.h>
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/*
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* Specifies the lower bound on ACK numbers carried in the TCP header
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*/
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#define SFE_IPV4_TCP_MAX_ACK_WINDOW 65520
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/*
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* IPv4 TCP connection match additional data.
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*/
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struct sfe_ipv4_tcp_connection_match {
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u8 win_scale; /* Window scale */
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u32 max_win; /* Maximum window size seen */
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u32 end; /* Sequence number of the next byte to send (seq + segment length) */
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u32 max_end; /* Sequence number of the last byte to ack */
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};
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/*
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* Bit flags for IPv4 connection matching entry.
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*/
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_XLATE_SRC (1<<0)
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/* Perform source translation */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_XLATE_DEST (1<<1)
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/* Perform destination translation */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_NO_SEQ_CHECK (1<<2)
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/* Ignore TCP sequence numbers */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_WRITE_FAST_ETH_HDR (1<<3)
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/* Fast Ethernet header write */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_WRITE_L2_HDR (1<<4)
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/* Fast Ethernet header write */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_PRIORITY_REMARK (1<<5)
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/* remark priority of SKB */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_DSCP_REMARK (1<<6)
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/* remark DSCP of packet */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_CSUM_OFFLOAD (1<<7)
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/* checksum offload.*/
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_PPPOE_DECAP (1<<8)
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/* Indicates that PPPoE should be decapsulated */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_PPPOE_ENCAP (1<<9)
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/* Indicates that PPPoE should be encapsulated */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_BRIDGE_FLOW (1<<10)
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/* Bridge flow */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_MARK (1<<11)
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/* skb mark of the packet */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_INSERT_EGRESS_VLAN_TAG (1<<12)
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/* Insert VLAN tag */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_SRC_INTERFACE_CHECK (1<<13)
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/* Source interface check */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_PASSTHROUGH (1<<14)
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/* passthrough flow: encap/decap to be skipped for this flow */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_FAST_XMIT (1<<15)
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/* skb go fast xmit */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_FAST_XMIT_FLOW_CHECKED (1<<16)
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/* Fast xmit flow checked or not */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_FAST_XMIT_DEV_ADMISSION (1<<17)
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/* Fast xmit may be possible for this flow, if SFE check passes */
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#define SFE_IPV4_CONNECTION_MATCH_FLAG_SRC_INTERFACE_CHECK_NO_FLUSH (1<<18)
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/* Source interface check but do not flush the connection */
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/*
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* IPv4 connection matching structure.
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*/
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struct sfe_ipv4_connection_match {
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/*
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* References to other objects.
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*/
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struct hlist_node hnode;
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struct sfe_ipv4_connection *connection;
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struct sfe_ipv4_connection_match *counter_match;
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/* Matches the flow in the opposite direction as the one in *connection */
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/*
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* Characteristics that identify flows that match this rule.
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*/
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struct net_device *match_dev; /* Network device */
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u8 match_protocol; /* Protocol */
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__be32 match_src_ip; /* Source IP address */
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__be32 match_dest_ip; /* Destination IP address */
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__be16 match_src_port; /* Source port/connection ident */
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__be16 match_dest_port; /* Destination port/connection ident */
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struct udp_sock *up; /* Stores UDP sock information; valid only in decap path */
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#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0))
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const struct net_protocol *proto; /* stores protocol handler; valid only in decap path */
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#else
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struct net_protocol *proto; /* stores protocol handler; valid only in decap path */
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#endif
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/*
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* Control the operations of the match.
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*/
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u32 flags; /* Bit flags */
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#ifdef CONFIG_NF_FLOW_COOKIE
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u32 flow_cookie; /* used flow cookie, for debug */
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#endif
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#ifdef CONFIG_XFRM
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u32 flow_accel; /* The flow accelerated or not */
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#endif
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/*
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* Connection state that we track once we match.
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*/
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union { /* Protocol-specific state */
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struct sfe_ipv4_tcp_connection_match tcp;
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} protocol_state;
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/*
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* VLAN headers
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*/
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struct sfe_vlan_hdr ingress_vlan_hdr[SFE_MAX_VLAN_DEPTH];
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struct sfe_vlan_hdr egress_vlan_hdr[SFE_MAX_VLAN_DEPTH];
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/*
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* Stats recorded in a sync period. These stats will be added to
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* rx_packet_count64/rx_byte_count64 after a sync period.
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*/
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atomic_t rx_packet_count;
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atomic_t rx_byte_count;
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/*
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* Packet translation information.
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*/
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__be32 xlate_src_ip; /* Address after source translation */
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__be16 xlate_src_port; /* Port/connection ident after source translation */
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u16 xlate_src_csum_adjustment;
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/* Transport layer checksum adjustment after source translation */
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u16 xlate_src_partial_csum_adjustment;
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/* Transport layer pseudo header checksum adjustment after source translation */
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__be32 xlate_dest_ip; /* Address after destination translation */
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__be16 xlate_dest_port; /* Port/connection ident after destination translation */
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u16 xlate_dest_csum_adjustment;
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/* Transport layer checksum adjustment after destination translation */
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u16 xlate_dest_partial_csum_adjustment;
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/* Transport layer pseudo header checksum adjustment after destination translation */
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/*
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* QoS information
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*/
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u32 priority;
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u32 dscp;
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u32 mark; /* mark for outgoing packet */
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/*
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* Packet transmit information.
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*/
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struct net_device *xmit_dev; /* Network device on which to transmit */
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unsigned short int xmit_dev_mtu;
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/* Interface MTU */
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u16 xmit_dest_mac[ETH_ALEN / 2];
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/* Destination MAC address to use when forwarding */
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u16 xmit_src_mac[ETH_ALEN / 2];
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/* Source MAC address to use when forwarding */
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u8 ingress_vlan_hdr_cnt; /* Ingress active vlan headers count */
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u8 egress_vlan_hdr_cnt; /* Egress active vlan headers count */
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/*
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* Summary stats.
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*/
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u64 rx_packet_count64;
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u64 rx_byte_count64;
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/*
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* PPPoE information
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*/
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u16 pppoe_session_id;
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u8 pppoe_remote_mac[ETH_ALEN];
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struct net_device *top_interface_dev; /* Used by tun6rd to store decap VLAN netdevice.*/
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/*
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* Size of all needed L2 headers
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*/
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u16 l2_hdr_size;
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/*
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* xmit device's feature
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*/
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netdev_features_t features;
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bool sawf_valid; /* Indicates mark has valid SAWF information */
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};
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/*
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* Per-connection data structure.
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*/
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struct sfe_ipv4_connection {
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struct sfe_ipv4_connection *next;
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/* Pointer to the next entry in a hash chain */
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struct sfe_ipv4_connection *prev;
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/* Pointer to the previous entry in a hash chain */
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int protocol; /* IP protocol number */
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__be32 src_ip; /* Src IP addr pre-translation */
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__be32 src_ip_xlate; /* Src IP addr post-translation */
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__be32 dest_ip; /* Dest IP addr pre-translation */
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__be32 dest_ip_xlate; /* Dest IP addr post-translation */
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__be16 src_port; /* Src port pre-translation */
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__be16 src_port_xlate; /* Src port post-translation */
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__be16 dest_port; /* Dest port pre-translation */
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__be16 dest_port_xlate; /* Dest port post-translation */
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struct sfe_ipv4_connection_match *original_match;
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/* Original direction matching structure */
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struct net_device *original_dev;
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/* Original direction source device */
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struct sfe_ipv4_connection_match *reply_match;
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/* Reply direction matching structure */
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struct net_device *reply_dev; /* Reply direction source device */
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u64 last_sync_jiffies; /* Jiffies count for the last sync */
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struct sfe_ipv4_connection *all_connections_next;
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/* Pointer to the next entry in the list of all connections */
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struct sfe_ipv4_connection *all_connections_prev;
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/* Pointer to the previous entry in the list of all connections */
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u32 debug_read_seq; /* sequence number for debug dump */
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bool removed; /* Indicates the connection is removed */
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struct rcu_head rcu; /* delay rcu free */
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};
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/*
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* IPv4 connections and hash table size information.
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*/
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#define SFE_IPV4_CONNECTION_HASH_SHIFT 12
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#define SFE_IPV4_CONNECTION_HASH_SIZE (1 << SFE_IPV4_CONNECTION_HASH_SHIFT)
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#define SFE_IPV4_CONNECTION_HASH_MASK (SFE_IPV4_CONNECTION_HASH_SIZE - 1)
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enum sfe_ipv4_exception_events {
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SFE_IPV4_EXCEPTION_EVENT_UDP_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_UDP_NO_CONNECTION,
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SFE_IPV4_EXCEPTION_EVENT_UDP_IP_OPTIONS_OR_INITIAL_FRAGMENT,
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SFE_IPV4_EXCEPTION_EVENT_UDP_SMALL_TTL,
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SFE_IPV4_EXCEPTION_EVENT_UDP_NEEDS_FRAGMENTATION,
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SFE_IPV4_EXCEPTION_EVENT_TCP_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_TCP_NO_CONNECTION_SLOW_FLAGS,
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SFE_IPV4_EXCEPTION_EVENT_TCP_NO_CONNECTION_FAST_FLAGS,
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SFE_IPV4_EXCEPTION_EVENT_TCP_IP_OPTIONS_OR_INITIAL_FRAGMENT,
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SFE_IPV4_EXCEPTION_EVENT_TCP_SMALL_TTL,
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SFE_IPV4_EXCEPTION_EVENT_TCP_NEEDS_FRAGMENTATION,
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SFE_IPV4_EXCEPTION_EVENT_TCP_FLAGS,
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SFE_IPV4_EXCEPTION_EVENT_TCP_SEQ_EXCEEDS_RIGHT_EDGE,
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SFE_IPV4_EXCEPTION_EVENT_TCP_SMALL_DATA_OFFS,
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SFE_IPV4_EXCEPTION_EVENT_TCP_BAD_SACK,
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SFE_IPV4_EXCEPTION_EVENT_TCP_BIG_DATA_OFFS,
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SFE_IPV4_EXCEPTION_EVENT_TCP_SEQ_BEFORE_LEFT_EDGE,
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SFE_IPV4_EXCEPTION_EVENT_TCP_ACK_EXCEEDS_RIGHT_EDGE,
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SFE_IPV4_EXCEPTION_EVENT_TCP_ACK_BEFORE_LEFT_EDGE,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_UNHANDLED_TYPE,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_IPV4_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_IPV4_NON_V4,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_IPV4_IP_OPTIONS_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_IPV4_UDP_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_IPV4_TCP_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_IPV4_UNHANDLED_PROTOCOL,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_NO_CONNECTION,
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SFE_IPV4_EXCEPTION_EVENT_ICMP_FLUSHED_CONNECTION,
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SFE_IPV4_EXCEPTION_EVENT_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_HEADER_CSUM_BAD,
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SFE_IPV4_EXCEPTION_EVENT_BAD_TOTAL_LENGTH,
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SFE_IPV4_EXCEPTION_EVENT_NON_V4,
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SFE_IPV4_EXCEPTION_EVENT_NON_INITIAL_FRAGMENT,
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SFE_IPV4_EXCEPTION_EVENT_DATAGRAM_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_IP_OPTIONS_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_UNHANDLED_PROTOCOL,
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SFE_IPV4_EXCEPTION_EVENT_NO_HEADROOM,
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SFE_IPV4_EXCEPTION_EVENT_INVALID_PPPOE_SESSION,
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SFE_IPV4_EXCEPTION_EVENT_INCORRECT_PPPOE_PARSING,
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SFE_IPV4_EXCEPTION_EVENT_PPPOE_NOT_SET_IN_CME,
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SFE_IPV4_EXCEPTION_EVENT_PPPOE_BR_NOT_IN_CME,
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SFE_IPV4_EXCEPTION_EVENT_INGRESS_VLAN_TAG_MISMATCH,
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SFE_IPV4_EXCEPTION_EVENT_INVALID_SRC_IFACE,
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SFE_IPV4_EXCEPTION_EVENT_TUN6RD_NO_CONNECTION,
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SFE_IPV4_EXCEPTION_EVENT_TUN6RD_NEEDS_FRAGMENTATION,
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SFE_IPV4_EXCEPTION_EVENT_TUN6RD_SYNC_ON_FIND,
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SFE_IPV4_EXCEPTION_EVENT_GRE_HEADER_INCOMPLETE,
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SFE_IPV4_EXCEPTION_EVENT_GRE_NO_CONNECTION,
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SFE_IPV4_EXCEPTION_EVENT_GRE_IP_OPTIONS_OR_INITIAL_FRAGMENT,
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SFE_IPV4_EXCEPTION_EVENT_GRE_SMALL_TTL,
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SFE_IPV4_EXCEPTION_EVENT_GRE_NEEDS_FRAGMENTATION,
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SFE_IPV4_EXCEPTION_EVENT_ESP_NO_CONNECTION,
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SFE_IPV4_EXCEPTION_EVENT_ESP_IP_OPTIONS_OR_INITIAL_FRAGMENT,
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SFE_IPV4_EXCEPTION_EVENT_ESP_NEEDS_FRAGMENTATION,
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SFE_IPV4_EXCEPTION_EVENT_ESP_SMALL_TTL,
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SFE_IPV4_EXCEPTION_EVENT_LAST
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};
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/*
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* per CPU stats
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*/
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struct sfe_ipv4_stats {
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/*
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* Stats recorded in a sync period. These stats will be added to
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* connection_xxx64 after a sync period.
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*/
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u64 connection_create_requests64;
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/* Number of IPv4 connection create requests */
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u64 connection_create_collisions64;
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/* Number of IPv4 connection create requests that collided with existing hash table entries */
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u64 connection_create_failures64;
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/* Number of IPv4 connection create requests that failed */
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u64 connection_destroy_requests64;
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/* Number of IPv4 connection destroy requests */
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u64 connection_destroy_misses64;
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/* Number of IPv4 connection destroy requests that missed our hash table */
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u64 connection_match_hash_hits64;
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/* Number of IPv4 connection match hash hits */
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u64 connection_match_hash_reorders64;
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/* Number of IPv4 connection match hash reorders */
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u64 connection_flushes64; /* Number of IPv4 connection flushes */
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u64 packets_dropped64; /* Number of IPv4 packets dropped */
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u64 packets_forwarded64; /* Number of IPv4 packets forwarded */
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u64 packets_fast_xmited64; /* Number of IPv4 packets fast transmited */
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u64 packets_not_forwarded64; /* Number of IPv4 packets not forwarded */
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u64 exception_events64[SFE_IPV4_EXCEPTION_EVENT_LAST];
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u64 pppoe_encap_packets_forwarded64; /* Number of IPv4 PPPoE encap packets forwarded */
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u64 pppoe_decap_packets_forwarded64; /* Number of IPv4 PPPoE decap packets forwarded */
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u64 pppoe_bridge_packets_forwarded64; /* Number of IPv4 PPPoE bridge packets forwarded */
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u64 pppoe_bridge_packets_3tuple_forwarded64; /* Number of IPv4 PPPoE bridge packets forwarded based on 3-tuple info */
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};
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/*
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* sfe_ipv4_per_service_class_stats
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* Per service class stats
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*/
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struct sfe_ipv4_per_service_class_stats {
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u64 tx_bytes; /* Byte count */
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u64 tx_packets; /* Packet count */
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seqcount_t seq; /* seq lock for read/write protection */
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/*
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* TODO : add entries to be collected later.
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*/
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};
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/*
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* sfe_ipv4_service_class_stats_db
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* stat entries for each service class.
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*/
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struct sfe_ipv4_service_class_stats_db {
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struct sfe_ipv4_per_service_class_stats psc_stats[SFE_MAX_SERVICE_CLASS_ID];
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/* Per service class stats */
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};
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/*
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* Per-module structure.
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*/
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struct sfe_ipv4 {
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spinlock_t lock; /* Lock for SMP correctness */
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struct sfe_ipv4_connection *all_connections_head;
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/* Head of the list of all connections */
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struct sfe_ipv4_connection *all_connections_tail;
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/* Tail of the list of all connections */
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unsigned int num_connections; /* Number of connections */
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struct delayed_work sync_dwork; /* Work to sync the statistics */
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unsigned int work_cpu; /* The core to run stats sync on */
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sfe_sync_rule_callback_t __rcu sync_rule_callback;
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sfe_ipv4_many_sync_callback_t __rcu many_sync_callback;
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/* Callback function registered by a connection manager for stats syncing */
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struct sfe_ipv4_connection *conn_hash[SFE_IPV4_CONNECTION_HASH_SIZE];
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/* Connection hash table */
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struct hlist_head hlist_conn_match_hash_head[SFE_IPV4_CONNECTION_HASH_SIZE];
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/* Connection match hash table */
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#ifdef CONFIG_NF_FLOW_COOKIE
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struct sfe_flow_cookie_entry sfe_flow_cookie_table[SFE_FLOW_COOKIE_SIZE];
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/* flow cookie table*/
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flow_cookie_set_func_t flow_cookie_set_func;
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/* function used to configure flow cookie in hardware*/
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int flow_cookie_enable;
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/* Enable/disable flow cookie at runtime */
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#endif
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struct sfe_ipv4_service_class_stats_db __percpu *stats_pcpu_psc;
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/* Database to maintain per cpu per service class statistics */
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struct sfe_ipv4_stats __percpu *stats_pcpu;
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/* Per CPU statistics. */
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struct sfe_ipv4_connection *wc_next; /* Connection list walk pointer for stats sync */
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/*
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* Control state.
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*/
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struct kobject *sys_ipv4; /* sysfs linkage */
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int debug_dev; /* Major number of the debug char device */
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u32 debug_read_seq; /* sequence number for debug dump */
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};
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/*
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* Enumeration of the XML output.
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*/
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enum sfe_ipv4_debug_xml_states {
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SFE_IPV4_DEBUG_XML_STATE_START,
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SFE_IPV4_DEBUG_XML_STATE_CONNECTIONS_START,
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SFE_IPV4_DEBUG_XML_STATE_CONNECTIONS_CONNECTION,
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SFE_IPV4_DEBUG_XML_STATE_CONNECTIONS_END,
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SFE_IPV4_DEBUG_XML_STATE_EXCEPTIONS_START,
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SFE_IPV4_DEBUG_XML_STATE_EXCEPTIONS_EXCEPTION,
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SFE_IPV4_DEBUG_XML_STATE_EXCEPTIONS_END,
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SFE_IPV4_DEBUG_XML_STATE_STATS,
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SFE_IPV4_DEBUG_XML_STATE_END,
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SFE_IPV4_DEBUG_XML_STATE_DONE
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};
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|
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/*
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* XML write state.
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*/
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struct sfe_ipv4_debug_xml_write_state {
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enum sfe_ipv4_debug_xml_states state;
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/* XML output file state machine state */
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int iter_exception; /* Next exception iterator */
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|
};
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|
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typedef bool (*sfe_ipv4_debug_xml_write_method_t)(struct sfe_ipv4 *si, char *buffer, char *msg, size_t *length,
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int *total_read, struct sfe_ipv4_debug_xml_write_state *ws);
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|
|
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u16 sfe_ipv4_gen_ip_csum(struct iphdr *iph);
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bool sfe_ipv4_service_class_stats_get(uint8_t sid, uint64_t *bytes, uint64_t *packets);
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|
void sfe_ipv4_service_class_stats_inc(struct sfe_ipv4 *si, uint8_t sid, uint64_t bytes);
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void sfe_ipv4_exception_stats_inc(struct sfe_ipv4 *si, enum sfe_ipv4_exception_events reason);
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|
bool sfe_ipv4_remove_connection(struct sfe_ipv4 *si, struct sfe_ipv4_connection *c);
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void sfe_ipv4_flush_connection(struct sfe_ipv4 *si, struct sfe_ipv4_connection *c, sfe_sync_reason_t reason);
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|
void sfe_ipv4_sync_status(struct sfe_ipv4 *si, struct sfe_ipv4_connection *c, sfe_sync_reason_t reason);
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|
|
|
struct sfe_ipv4_connection_match *
|
|
sfe_ipv4_find_connection_match_rcu(struct sfe_ipv4 *si, struct net_device *dev, u8 protocol,
|
|
__be32 src_ip, __be16 src_port,
|
|
__be32 dest_ip, __be16 dest_port);
|
|
|
|
void sfe_ipv4_exit(void);
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int sfe_ipv4_init(void);
|
|
|
|
#endif /* __SFE_IPV4_H */
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