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422 | giacomo | 1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
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3 | * operating system. INET is implemented using the BSD Socket |
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4 | * interface as the means of communication with the user level. |
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5 | * |
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6 | * Definitions for the Interfaces handler. |
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7 | * |
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8 | * Version: @(#)dev.h 1.0.10 08/12/93 |
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9 | * |
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10 | * Authors: Ross Biro, <bir7@leland.Stanford.Edu> |
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11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
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12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> |
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13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> |
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14 | * Alan Cox, <Alan.Cox@linux.org> |
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15 | * Bjorn Ekwall. <bj0rn@blox.se> |
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16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> |
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17 | * |
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18 | * This program is free software; you can redistribute it and/or |
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19 | * modify it under the terms of the GNU General Public License |
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20 | * as published by the Free Software Foundation; either version |
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21 | * 2 of the License, or (at your option) any later version. |
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22 | * |
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23 | * Moved to /usr/include/linux for NET3 |
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24 | */ |
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25 | #ifndef _LINUX_NETDEVICE_H |
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26 | #define _LINUX_NETDEVICE_H |
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27 | |||
28 | #include <linux/if.h> |
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29 | #include <linux/if_ether.h> |
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30 | #include <linux/if_packet.h> |
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31 | |||
32 | #include <asm/atomic.h> |
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33 | #include <asm/cache.h> |
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34 | #include <asm/byteorder.h> |
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35 | |||
36 | #ifdef __KERNEL__ |
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37 | #include <linux/config.h> |
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38 | #include <linux/device.h> |
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39 | #include <linux/percpu.h> |
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40 | |||
41 | struct divert_blk; |
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42 | struct vlan_group; |
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43 | struct ethtool_ops; |
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44 | |||
45 | /* source back-compat hook */ |
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46 | #define SET_ETHTOOL_OPS(netdev,ops) \ |
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47 | ( (netdev)->ethtool_ops = (ops) ) |
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48 | |||
49 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev |
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50 | functions are available. */ |
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51 | #define HAVE_FREE_NETDEV |
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52 | |||
53 | #define NET_XMIT_SUCCESS 0 |
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54 | #define NET_XMIT_DROP 1 /* skb dropped */ |
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55 | #define NET_XMIT_CN 2 /* congestion notification */ |
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56 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ |
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57 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; |
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58 | (TC use only - dev_queue_xmit |
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59 | returns this as NET_XMIT_SUCCESS) */ |
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60 | |||
61 | /* Backlog congestion levels */ |
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62 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
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63 | #define NET_RX_DROP 1 /* packet dropped */ |
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64 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ |
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65 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ |
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66 | #define NET_RX_CN_HIGH 4 /* The storm is here */ |
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67 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ |
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68 | |||
69 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
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70 | |||
71 | #endif |
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72 | |||
73 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ |
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74 | |||
75 | /* |
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76 | * Compute the worst case header length according to the protocols |
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77 | * used. |
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78 | */ |
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79 | |||
80 | #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) |
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81 | #define LL_MAX_HEADER 32 |
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82 | #else |
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83 | #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) |
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84 | #define LL_MAX_HEADER 96 |
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85 | #else |
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86 | #define LL_MAX_HEADER 48 |
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87 | #endif |
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88 | #endif |
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89 | |||
90 | #if !defined(CONFIG_NET_IPIP) && \ |
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91 | !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE) |
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92 | #define MAX_HEADER LL_MAX_HEADER |
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93 | #else |
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94 | #define MAX_HEADER (LL_MAX_HEADER + 48) |
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95 | #endif |
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96 | |||
97 | /* |
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98 | * Network device statistics. Akin to the 2.0 ether stats but |
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99 | * with byte counters. |
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100 | */ |
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101 | |||
102 | struct net_device_stats |
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103 | { |
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104 | unsigned long rx_packets; /* total packets received */ |
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105 | unsigned long tx_packets; /* total packets transmitted */ |
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106 | unsigned long rx_bytes; /* total bytes received */ |
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107 | unsigned long tx_bytes; /* total bytes transmitted */ |
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108 | unsigned long rx_errors; /* bad packets received */ |
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109 | unsigned long tx_errors; /* packet transmit problems */ |
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110 | unsigned long rx_dropped; /* no space in linux buffers */ |
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111 | unsigned long tx_dropped; /* no space available in linux */ |
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112 | unsigned long multicast; /* multicast packets received */ |
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113 | unsigned long collisions; |
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114 | |||
115 | /* detailed rx_errors: */ |
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116 | unsigned long rx_length_errors; |
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117 | unsigned long rx_over_errors; /* receiver ring buff overflow */ |
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118 | unsigned long rx_crc_errors; /* recved pkt with crc error */ |
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119 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ |
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120 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ |
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121 | unsigned long rx_missed_errors; /* receiver missed packet */ |
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122 | |||
123 | /* detailed tx_errors */ |
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124 | unsigned long tx_aborted_errors; |
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125 | unsigned long tx_carrier_errors; |
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126 | unsigned long tx_fifo_errors; |
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127 | unsigned long tx_heartbeat_errors; |
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128 | unsigned long tx_window_errors; |
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129 | |||
130 | /* for cslip etc */ |
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131 | unsigned long rx_compressed; |
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132 | unsigned long tx_compressed; |
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133 | }; |
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134 | |||
135 | |||
136 | /* Media selection options. */ |
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137 | enum { |
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138 | IF_PORT_UNKNOWN = 0, |
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139 | IF_PORT_10BASE2, |
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140 | IF_PORT_10BASET, |
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141 | IF_PORT_AUI, |
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142 | IF_PORT_100BASET, |
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143 | IF_PORT_100BASETX, |
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144 | IF_PORT_100BASEFX |
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145 | }; |
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146 | |||
147 | #ifdef __KERNEL__ |
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148 | |||
149 | #include <linux/cache.h> |
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150 | #include <linux/skbuff.h> |
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151 | |||
152 | struct neighbour; |
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153 | struct neigh_parms; |
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154 | struct sk_buff; |
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155 | |||
156 | struct netif_rx_stats |
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157 | { |
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158 | unsigned total; |
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159 | unsigned dropped; |
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160 | unsigned time_squeeze; |
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161 | unsigned throttled; |
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162 | unsigned fastroute_hit; |
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163 | unsigned fastroute_success; |
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164 | unsigned fastroute_defer; |
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165 | unsigned fastroute_deferred_out; |
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166 | unsigned fastroute_latency_reduction; |
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167 | unsigned cpu_collision; |
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168 | }; |
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169 | |||
170 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); |
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171 | |||
172 | |||
173 | /* |
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174 | * We tag multicasts with these structures. |
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175 | */ |
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176 | |||
177 | struct dev_mc_list |
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178 | { |
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179 | struct dev_mc_list *next; |
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180 | __u8 dmi_addr[MAX_ADDR_LEN]; |
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181 | unsigned char dmi_addrlen; |
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182 | int dmi_users; |
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183 | int dmi_gusers; |
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184 | }; |
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185 | |||
186 | struct hh_cache |
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187 | { |
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188 | struct hh_cache *hh_next; /* Next entry */ |
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189 | atomic_t hh_refcnt; /* number of users */ |
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190 | unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP |
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191 | * NOTE: For VLANs, this will be the |
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192 | * encapuslated type. --BLG |
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193 | */ |
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194 | int hh_len; /* length of header */ |
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195 | int (*hh_output)(struct sk_buff *skb); |
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196 | rwlock_t hh_lock; |
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197 | |||
198 | /* cached hardware header; allow for machine alignment needs. */ |
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199 | #define HH_DATA_MOD 16 |
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200 | #define HH_DATA_OFF(__len) \ |
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201 | (HH_DATA_MOD - ((__len) & (HH_DATA_MOD - 1))) |
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202 | #define HH_DATA_ALIGN(__len) \ |
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203 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
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204 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
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205 | }; |
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206 | |||
207 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. |
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208 | * Alternative is: |
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209 | * dev->hard_header_len ? (dev->hard_header_len + |
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210 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
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211 | * |
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212 | * We could use other alignment values, but we must maintain the |
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213 | * relationship HH alignment <= LL alignment. |
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214 | */ |
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215 | #define LL_RESERVED_SPACE(dev) \ |
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216 | (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
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217 | |||
218 | /* These flag bits are private to the generic network queueing |
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219 | * layer, they may not be explicitly referenced by any other |
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220 | * code. |
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221 | */ |
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222 | |||
223 | enum netdev_state_t |
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224 | { |
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225 | __LINK_STATE_XOFF=0, |
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226 | __LINK_STATE_START, |
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227 | __LINK_STATE_PRESENT, |
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228 | __LINK_STATE_SCHED, |
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229 | __LINK_STATE_NOCARRIER, |
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230 | __LINK_STATE_RX_SCHED, |
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231 | __LINK_STATE_LINKWATCH_PENDING |
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232 | }; |
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233 | |||
234 | |||
235 | /* |
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236 | * This structure holds at boot time configured netdevice settings. They |
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237 | * are then used in the device probing. |
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238 | */ |
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239 | struct netdev_boot_setup { |
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240 | char name[IFNAMSIZ]; |
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241 | struct ifmap map; |
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242 | }; |
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243 | #define NETDEV_BOOT_SETUP_MAX 8 |
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244 | |||
245 | |||
246 | /* |
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247 | * The DEVICE structure. |
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248 | * Actually, this whole structure is a big mistake. It mixes I/O |
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249 | * data with strictly "high-level" data, and it has to know about |
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250 | * almost every data structure used in the INET module. |
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251 | * |
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252 | * FIXME: cleanup struct net_device such that network protocol info |
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253 | * moves out. |
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254 | */ |
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255 | |||
256 | struct net_device |
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257 | { |
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258 | |||
259 | /* |
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260 | * This is the first field of the "visible" part of this structure |
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261 | * (i.e. as seen by users in the "Space.c" file). It is the name |
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262 | * the interface. |
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263 | */ |
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264 | char name[IFNAMSIZ]; |
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265 | |||
266 | /* |
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267 | * I/O specific fields |
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268 | * FIXME: Merge these and struct ifmap into one |
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269 | */ |
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270 | unsigned long mem_end; /* shared mem end */ |
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271 | unsigned long mem_start; /* shared mem start */ |
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272 | unsigned long base_addr; /* device I/O address */ |
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273 | unsigned int irq; /* device IRQ number */ |
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274 | |||
275 | /* |
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276 | * Some hardware also needs these fields, but they are not |
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277 | * part of the usual set specified in Space.c. |
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278 | */ |
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279 | |||
280 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
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281 | unsigned char dma; /* DMA channel */ |
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282 | |||
283 | unsigned long state; |
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284 | |||
285 | struct net_device *next; |
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286 | |||
287 | /* The device initialization function. Called only once. */ |
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288 | int (*init)(struct net_device *dev); |
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289 | |||
290 | /* ------- Fields preinitialized in Space.c finish here ------- */ |
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291 | |||
292 | struct net_device *next_sched; |
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293 | |||
294 | /* Interface index. Unique device identifier */ |
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295 | int ifindex; |
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296 | int iflink; |
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297 | |||
298 | |||
299 | struct net_device_stats* (*get_stats)(struct net_device *dev); |
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300 | struct iw_statistics* (*get_wireless_stats)(struct net_device *dev); |
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301 | |||
302 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
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303 | * See <net/iw_handler.h> for details. Jean II */ |
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304 | struct iw_handler_def * wireless_handlers; |
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305 | |||
306 | struct ethtool_ops *ethtool_ops; |
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307 | |||
308 | /* |
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309 | * This marks the end of the "visible" part of the structure. All |
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310 | * fields hereafter are internal to the system, and may change at |
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311 | * will (read: may be cleaned up at will). |
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312 | */ |
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313 | |||
314 | /* These may be needed for future network-power-down code. */ |
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315 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
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316 | unsigned long last_rx; /* Time of last Rx */ |
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317 | |||
318 | unsigned short flags; /* interface flags (a la BSD) */ |
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319 | unsigned short gflags; |
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320 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ |
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321 | unsigned short unused_alignment_fixer; /* Because we need priv_flags, |
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322 | * and we want to be 32-bit aligned. |
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323 | */ |
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324 | |||
325 | unsigned mtu; /* interface MTU value */ |
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326 | unsigned short type; /* interface hardware type */ |
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327 | unsigned short hard_header_len; /* hardware hdr length */ |
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328 | void *priv; /* pointer to private data */ |
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329 | |||
330 | struct net_device *master; /* Pointer to master device of a group, |
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331 | * which this device is member of. |
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332 | */ |
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333 | |||
334 | /* Interface address info. */ |
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335 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
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336 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */ |
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337 | unsigned char addr_len; /* hardware address length */ |
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338 | |||
339 | struct dev_mc_list *mc_list; /* Multicast mac addresses */ |
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340 | int mc_count; /* Number of installed mcasts */ |
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341 | int promiscuity; |
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342 | int allmulti; |
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343 | |||
344 | int watchdog_timeo; |
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345 | struct timer_list watchdog_timer; |
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346 | |||
347 | /* Protocol specific pointers */ |
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348 | |||
349 | void *atalk_ptr; /* AppleTalk link */ |
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350 | void *ip_ptr; /* IPv4 specific data */ |
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351 | void *dn_ptr; /* DECnet specific data */ |
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352 | void *ip6_ptr; /* IPv6 specific data */ |
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353 | void *ec_ptr; /* Econet specific data */ |
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354 | void *ax25_ptr; /* AX.25 specific data */ |
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355 | |||
356 | struct list_head poll_list; /* Link to poll list */ |
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357 | int quota; |
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358 | int weight; |
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359 | |||
360 | struct Qdisc *qdisc; |
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361 | struct Qdisc *qdisc_sleeping; |
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362 | struct Qdisc *qdisc_list; |
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363 | struct Qdisc *qdisc_ingress; |
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364 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
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365 | |||
366 | /* hard_start_xmit synchronizer */ |
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367 | spinlock_t xmit_lock; |
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368 | /* cpu id of processor entered to hard_start_xmit or -1, |
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369 | if nobody entered there. |
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370 | */ |
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371 | int xmit_lock_owner; |
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372 | /* device queue lock */ |
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373 | spinlock_t queue_lock; |
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374 | /* Number of references to this device */ |
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375 | atomic_t refcnt; |
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376 | /* delayed register/unregister */ |
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377 | struct list_head todo_list; |
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378 | |||
379 | /* register/unregister state machine */ |
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380 | enum { NETREG_UNINITIALIZED=0, |
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381 | NETREG_REGISTERING, /* called register_netdevice */ |
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382 | NETREG_REGISTERED, /* completed register todo */ |
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383 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
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384 | NETREG_UNREGISTERED, /* completed unregister todo */ |
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385 | NETREG_RELEASED, /* called free_netdev */ |
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386 | } reg_state; |
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387 | |||
388 | /* Net device features */ |
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389 | int features; |
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390 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ |
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391 | #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */ |
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392 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
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393 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ |
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394 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
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395 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ |
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396 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ |
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397 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ |
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398 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ |
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399 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ |
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400 | #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */ |
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401 | |||
402 | /* Called after device is detached from network. */ |
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403 | void (*uninit)(struct net_device *dev); |
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404 | /* Called after last user reference disappears. */ |
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405 | void (*destructor)(struct net_device *dev); |
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406 | |||
407 | /* Pointers to interface service routines. */ |
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408 | int (*open)(struct net_device *dev); |
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409 | int (*stop)(struct net_device *dev); |
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410 | int (*hard_start_xmit) (struct sk_buff *skb, |
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411 | struct net_device *dev); |
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412 | #define HAVE_NETDEV_POLL |
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413 | int (*poll) (struct net_device *dev, int *quota); |
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414 | int (*hard_header) (struct sk_buff *skb, |
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415 | struct net_device *dev, |
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416 | unsigned short type, |
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417 | void *daddr, |
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418 | void *saddr, |
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419 | unsigned len); |
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420 | int (*rebuild_header)(struct sk_buff *skb); |
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421 | #define HAVE_MULTICAST |
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422 | void (*set_multicast_list)(struct net_device *dev); |
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423 | #define HAVE_SET_MAC_ADDR |
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424 | int (*set_mac_address)(struct net_device *dev, |
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425 | void *addr); |
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426 | #define HAVE_PRIVATE_IOCTL |
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427 | int (*do_ioctl)(struct net_device *dev, |
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428 | struct ifreq *ifr, int cmd); |
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429 | #define HAVE_SET_CONFIG |
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430 | int (*set_config)(struct net_device *dev, |
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431 | struct ifmap *map); |
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432 | #define HAVE_HEADER_CACHE |
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433 | int (*hard_header_cache)(struct neighbour *neigh, |
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434 | struct hh_cache *hh); |
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435 | void (*header_cache_update)(struct hh_cache *hh, |
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436 | struct net_device *dev, |
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437 | unsigned char * haddr); |
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438 | #define HAVE_CHANGE_MTU |
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439 | int (*change_mtu)(struct net_device *dev, int new_mtu); |
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440 | |||
441 | #define HAVE_TX_TIMEOUT |
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442 | void (*tx_timeout) (struct net_device *dev); |
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443 | |||
444 | void (*vlan_rx_register)(struct net_device *dev, |
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445 | struct vlan_group *grp); |
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446 | void (*vlan_rx_add_vid)(struct net_device *dev, |
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447 | unsigned short vid); |
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448 | void (*vlan_rx_kill_vid)(struct net_device *dev, |
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449 | unsigned short vid); |
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450 | |||
451 | int (*hard_header_parse)(struct sk_buff *skb, |
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452 | unsigned char *haddr); |
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453 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); |
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454 | int (*accept_fastpath)(struct net_device *, struct dst_entry*); |
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455 | |||
456 | /* bridge stuff */ |
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457 | struct net_bridge_port *br_port; |
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458 | |||
459 | #ifdef CONFIG_NET_FASTROUTE |
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460 | #define NETDEV_FASTROUTE_HMASK 0xF |
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461 | /* Semi-private data. Keep it at the end of device struct. */ |
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462 | rwlock_t fastpath_lock; |
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463 | struct dst_entry *fastpath[NETDEV_FASTROUTE_HMASK+1]; |
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464 | #endif |
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465 | #ifdef CONFIG_NET_DIVERT |
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466 | /* this will get initialized at each interface type init routine */ |
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467 | struct divert_blk *divert; |
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468 | #endif /* CONFIG_NET_DIVERT */ |
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469 | |||
470 | /* class/net/name entry */ |
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471 | struct class_device class_dev; |
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472 | struct net_device_stats* (*last_stats)(struct net_device *); |
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473 | }; |
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474 | |||
475 | #define SET_MODULE_OWNER(dev) do { } while (0) |
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476 | /* Set the sysfs physical device reference for the network logical device |
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477 | * if set prior to registration will cause a symlink during initialization. |
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478 | */ |
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479 | #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev)) |
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480 | |||
481 | struct packet_type { |
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482 | unsigned short type; /* This is really htons(ether_type). */ |
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483 | struct net_device *dev; /* NULL is wildcarded here */ |
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484 | int (*func) (struct sk_buff *, struct net_device *, |
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485 | struct packet_type *); |
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486 | void *af_packet_priv; |
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487 | struct list_head list; |
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488 | }; |
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489 | |||
490 | #include <linux/interrupt.h> |
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491 | #include <linux/notifier.h> |
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492 | |||
493 | extern struct net_device loopback_dev; /* The loopback */ |
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494 | extern struct net_device *dev_base; /* All devices */ |
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495 | extern rwlock_t dev_base_lock; /* Device list lock */ |
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496 | |||
497 | extern int netdev_boot_setup_add(char *name, struct ifmap *map); |
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498 | extern int netdev_boot_setup_check(struct net_device *dev); |
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499 | extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr); |
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500 | extern struct net_device *__dev_getfirstbyhwtype(unsigned short type); |
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501 | extern struct net_device *dev_getfirstbyhwtype(unsigned short type); |
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502 | extern void dev_add_pack(struct packet_type *pt); |
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503 | extern void dev_remove_pack(struct packet_type *pt); |
||
504 | extern void __dev_remove_pack(struct packet_type *pt); |
||
505 | extern int __dev_get(const char *name); |
||
506 | static inline int __deprecated dev_get(const char *name) |
||
507 | { |
||
508 | return __dev_get(name); |
||
509 | } |
||
510 | extern struct net_device *dev_get_by_flags(unsigned short flags, |
||
511 | unsigned short mask); |
||
512 | extern struct net_device *__dev_get_by_flags(unsigned short flags, |
||
513 | unsigned short mask); |
||
514 | extern struct net_device *dev_get_by_name(const char *name); |
||
515 | extern struct net_device *__dev_get_by_name(const char *name); |
||
516 | extern struct net_device *__dev_alloc(const char *name, int *err); |
||
517 | static inline __deprecated struct net_device *dev_alloc(const char *name, int *err) |
||
518 | { |
||
519 | return __dev_alloc(name, err); |
||
520 | } |
||
521 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
||
522 | extern int dev_open(struct net_device *dev); |
||
523 | extern int dev_close(struct net_device *dev); |
||
524 | extern int dev_queue_xmit(struct sk_buff *skb); |
||
525 | extern int register_netdevice(struct net_device *dev); |
||
526 | extern int unregister_netdevice(struct net_device *dev); |
||
527 | extern void free_netdev(struct net_device *dev); |
||
528 | extern void synchronize_net(void); |
||
529 | extern int register_netdevice_notifier(struct notifier_block *nb); |
||
530 | extern int unregister_netdevice_notifier(struct notifier_block *nb); |
||
531 | extern int call_netdevice_notifiers(unsigned long val, void *v); |
||
532 | extern int dev_new_index(void); |
||
533 | extern struct net_device *dev_get_by_index(int ifindex); |
||
534 | extern struct net_device *__dev_get_by_index(int ifindex); |
||
535 | extern int dev_restart(struct net_device *dev); |
||
536 | |||
537 | typedef int gifconf_func_t(struct net_device * dev, char * bufptr, int len); |
||
538 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); |
||
539 | static inline int unregister_gifconf(unsigned int family) |
||
540 | { |
||
541 | return register_gifconf(family, 0); |
||
542 | } |
||
543 | |||
544 | /* |
||
545 | * Incoming packets are placed on per-cpu queues so that |
||
546 | * no locking is needed. |
||
547 | */ |
||
548 | |||
549 | struct softnet_data |
||
550 | { |
||
551 | int throttle; |
||
552 | int cng_level; |
||
553 | int avg_blog; |
||
554 | struct sk_buff_head input_pkt_queue; |
||
555 | struct list_head poll_list; |
||
556 | struct net_device *output_queue; |
||
557 | struct sk_buff *completion_queue; |
||
558 | |||
559 | struct net_device backlog_dev; /* Sorry. 8) */ |
||
560 | }; |
||
561 | |||
562 | DECLARE_PER_CPU(struct softnet_data,softnet_data); |
||
563 | |||
564 | #define HAVE_NETIF_QUEUE |
||
565 | |||
566 | static inline void __netif_schedule(struct net_device *dev) |
||
567 | { |
||
568 | if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) { |
||
569 | unsigned long flags; |
||
570 | struct softnet_data *sd; |
||
571 | |||
572 | local_irq_save(flags); |
||
573 | sd = &__get_cpu_var(softnet_data); |
||
574 | dev->next_sched = sd->output_queue; |
||
575 | sd->output_queue = dev; |
||
576 | raise_softirq_irqoff(NET_TX_SOFTIRQ); |
||
577 | local_irq_restore(flags); |
||
578 | } |
||
579 | } |
||
580 | |||
581 | static inline void netif_schedule(struct net_device *dev) |
||
582 | { |
||
583 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) |
||
584 | __netif_schedule(dev); |
||
585 | } |
||
586 | |||
587 | static inline void netif_start_queue(struct net_device *dev) |
||
588 | { |
||
589 | clear_bit(__LINK_STATE_XOFF, &dev->state); |
||
590 | } |
||
591 | |||
592 | static inline void netif_wake_queue(struct net_device *dev) |
||
593 | { |
||
594 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) |
||
595 | __netif_schedule(dev); |
||
596 | } |
||
597 | |||
598 | static inline void netif_stop_queue(struct net_device *dev) |
||
599 | { |
||
600 | set_bit(__LINK_STATE_XOFF, &dev->state); |
||
601 | } |
||
602 | |||
603 | static inline int netif_queue_stopped(const struct net_device *dev) |
||
604 | { |
||
605 | return test_bit(__LINK_STATE_XOFF, &dev->state); |
||
606 | } |
||
607 | |||
608 | static inline int netif_running(const struct net_device *dev) |
||
609 | { |
||
610 | return test_bit(__LINK_STATE_START, &dev->state); |
||
611 | } |
||
612 | |||
613 | |||
614 | /* Use this variant when it is known for sure that it |
||
615 | * is executing from interrupt context. |
||
616 | */ |
||
617 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
||
618 | { |
||
619 | if (atomic_dec_and_test(&skb->users)) { |
||
620 | struct softnet_data *sd; |
||
621 | unsigned long flags; |
||
622 | |||
623 | local_irq_save(flags); |
||
624 | sd = &__get_cpu_var(softnet_data); |
||
625 | skb->next = sd->completion_queue; |
||
626 | sd->completion_queue = skb; |
||
627 | raise_softirq_irqoff(NET_TX_SOFTIRQ); |
||
628 | local_irq_restore(flags); |
||
629 | } |
||
630 | } |
||
631 | |||
632 | /* Use this variant in places where it could be invoked |
||
633 | * either from interrupt or non-interrupt context. |
||
634 | */ |
||
635 | static inline void dev_kfree_skb_any(struct sk_buff *skb) |
||
636 | { |
||
637 | if (in_irq()) |
||
638 | dev_kfree_skb_irq(skb); |
||
639 | else |
||
640 | dev_kfree_skb(skb); |
||
641 | } |
||
642 | |||
643 | #define HAVE_NETIF_RX 1 |
||
644 | extern int netif_rx(struct sk_buff *skb); |
||
645 | #define HAVE_NETIF_RECEIVE_SKB 1 |
||
646 | extern int netif_receive_skb(struct sk_buff *skb); |
||
647 | extern int dev_ioctl(unsigned int cmd, void *); |
||
648 | extern int dev_ethtool(struct ifreq *); |
||
649 | extern unsigned dev_get_flags(const struct net_device *); |
||
650 | extern int dev_change_flags(struct net_device *, unsigned); |
||
651 | extern int dev_set_mtu(struct net_device *, int); |
||
652 | extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); |
||
653 | |||
654 | extern void dev_init(void); |
||
655 | |||
656 | extern int netdev_nit; |
||
657 | |||
658 | /* Post buffer to the network code from _non interrupt_ context. |
||
659 | * see net/core/dev.c for netif_rx description. |
||
660 | */ |
||
661 | static inline int netif_rx_ni(struct sk_buff *skb) |
||
662 | { |
||
663 | int err = netif_rx(skb); |
||
664 | if (softirq_pending(smp_processor_id())) |
||
665 | do_softirq(); |
||
666 | return err; |
||
667 | } |
||
668 | |||
669 | /* Called by rtnetlink.c:rtnl_unlock() */ |
||
670 | extern void netdev_run_todo(void); |
||
671 | |||
672 | static inline void dev_put(struct net_device *dev) |
||
673 | { |
||
674 | atomic_dec(&dev->refcnt); |
||
675 | } |
||
676 | |||
677 | #define __dev_put(dev) atomic_dec(&(dev)->refcnt) |
||
678 | #define dev_hold(dev) atomic_inc(&(dev)->refcnt) |
||
679 | |||
680 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
||
681 | * and _off may be called from IRQ context, but it is caller |
||
682 | * who is responsible for serialization of these calls. |
||
683 | */ |
||
684 | |||
685 | extern void linkwatch_fire_event(struct net_device *dev); |
||
686 | |||
687 | static inline int netif_carrier_ok(const struct net_device *dev) |
||
688 | { |
||
689 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
||
690 | } |
||
691 | |||
692 | extern void __netdev_watchdog_up(struct net_device *dev); |
||
693 | |||
694 | static inline void netif_carrier_on(struct net_device *dev) |
||
695 | { |
||
696 | if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state)) |
||
697 | linkwatch_fire_event(dev); |
||
698 | if (netif_running(dev)) |
||
699 | __netdev_watchdog_up(dev); |
||
700 | } |
||
701 | |||
702 | static inline void netif_carrier_off(struct net_device *dev) |
||
703 | { |
||
704 | if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state)) |
||
705 | linkwatch_fire_event(dev); |
||
706 | } |
||
707 | |||
708 | /* Hot-plugging. */ |
||
709 | static inline int netif_device_present(struct net_device *dev) |
||
710 | { |
||
711 | return test_bit(__LINK_STATE_PRESENT, &dev->state); |
||
712 | } |
||
713 | |||
714 | static inline void netif_device_detach(struct net_device *dev) |
||
715 | { |
||
716 | if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) && |
||
717 | netif_running(dev)) { |
||
718 | netif_stop_queue(dev); |
||
719 | } |
||
720 | } |
||
721 | |||
722 | static inline void netif_device_attach(struct net_device *dev) |
||
723 | { |
||
724 | if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) && |
||
725 | netif_running(dev)) { |
||
726 | netif_wake_queue(dev); |
||
727 | __netdev_watchdog_up(dev); |
||
728 | } |
||
729 | } |
||
730 | |||
731 | /* |
||
732 | * Network interface message level settings |
||
733 | */ |
||
734 | #define HAVE_NETIF_MSG 1 |
||
735 | |||
736 | enum { |
||
737 | NETIF_MSG_DRV = 0x0001, |
||
738 | NETIF_MSG_PROBE = 0x0002, |
||
739 | NETIF_MSG_LINK = 0x0004, |
||
740 | NETIF_MSG_TIMER = 0x0008, |
||
741 | NETIF_MSG_IFDOWN = 0x0010, |
||
742 | NETIF_MSG_IFUP = 0x0020, |
||
743 | NETIF_MSG_RX_ERR = 0x0040, |
||
744 | NETIF_MSG_TX_ERR = 0x0080, |
||
745 | NETIF_MSG_TX_QUEUED = 0x0100, |
||
746 | NETIF_MSG_INTR = 0x0200, |
||
747 | NETIF_MSG_TX_DONE = 0x0400, |
||
748 | NETIF_MSG_RX_STATUS = 0x0800, |
||
749 | NETIF_MSG_PKTDATA = 0x1000, |
||
750 | NETIF_MSG_HW = 0x2000, |
||
751 | NETIF_MSG_WOL = 0x4000, |
||
752 | }; |
||
753 | |||
754 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
||
755 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
||
756 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
||
757 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
||
758 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
||
759 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
||
760 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
||
761 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
||
762 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
||
763 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
||
764 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
||
765 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
||
766 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
||
767 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
||
768 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
||
769 | |||
770 | /* Schedule rx intr now? */ |
||
771 | |||
772 | static inline int netif_rx_schedule_prep(struct net_device *dev) |
||
773 | { |
||
774 | return netif_running(dev) && |
||
775 | !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state); |
||
776 | } |
||
777 | |||
778 | /* Add interface to tail of rx poll list. This assumes that _prep has |
||
779 | * already been called and returned 1. |
||
780 | */ |
||
781 | |||
782 | static inline void __netif_rx_schedule(struct net_device *dev) |
||
783 | { |
||
784 | unsigned long flags; |
||
785 | |||
786 | local_irq_save(flags); |
||
787 | dev_hold(dev); |
||
788 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); |
||
789 | if (dev->quota < 0) |
||
790 | dev->quota += dev->weight; |
||
791 | else |
||
792 | dev->quota = dev->weight; |
||
793 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); |
||
794 | local_irq_restore(flags); |
||
795 | } |
||
796 | |||
797 | /* Try to reschedule poll. Called by irq handler. */ |
||
798 | |||
799 | static inline void netif_rx_schedule(struct net_device *dev) |
||
800 | { |
||
801 | if (netif_rx_schedule_prep(dev)) |
||
802 | __netif_rx_schedule(dev); |
||
803 | } |
||
804 | |||
805 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). |
||
806 | * Do not inline this? |
||
807 | */ |
||
808 | static inline int netif_rx_reschedule(struct net_device *dev, int undo) |
||
809 | { |
||
810 | if (netif_rx_schedule_prep(dev)) { |
||
811 | unsigned long flags; |
||
812 | |||
813 | dev->quota += undo; |
||
814 | |||
815 | local_irq_save(flags); |
||
816 | list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); |
||
817 | __raise_softirq_irqoff(NET_RX_SOFTIRQ); |
||
818 | local_irq_restore(flags); |
||
819 | return 1; |
||
820 | } |
||
821 | return 0; |
||
822 | } |
||
823 | |||
824 | /* Remove interface from poll list: it must be in the poll list |
||
825 | * on current cpu. This primitive is called by dev->poll(), when |
||
826 | * it completes the work. The device cannot be out of poll list at this |
||
827 | * moment, it is BUG(). |
||
828 | */ |
||
829 | static inline void netif_rx_complete(struct net_device *dev) |
||
830 | { |
||
831 | unsigned long flags; |
||
832 | |||
833 | local_irq_save(flags); |
||
834 | if (!test_bit(__LINK_STATE_RX_SCHED, &dev->state)) BUG(); |
||
835 | list_del(&dev->poll_list); |
||
836 | smp_mb__before_clear_bit(); |
||
837 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); |
||
838 | local_irq_restore(flags); |
||
839 | } |
||
840 | |||
841 | static inline void netif_poll_disable(struct net_device *dev) |
||
842 | { |
||
843 | while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) { |
||
844 | /* No hurry. */ |
||
845 | current->state = TASK_INTERRUPTIBLE; |
||
846 | schedule_timeout(1); |
||
847 | } |
||
848 | } |
||
849 | |||
850 | static inline void netif_poll_enable(struct net_device *dev) |
||
851 | { |
||
852 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); |
||
853 | } |
||
854 | |||
855 | /* same as netif_rx_complete, except that local_irq_save(flags) |
||
856 | * has already been issued |
||
857 | */ |
||
858 | static inline void __netif_rx_complete(struct net_device *dev) |
||
859 | { |
||
860 | if (!test_bit(__LINK_STATE_RX_SCHED, &dev->state)) BUG(); |
||
861 | list_del(&dev->poll_list); |
||
862 | smp_mb__before_clear_bit(); |
||
863 | clear_bit(__LINK_STATE_RX_SCHED, &dev->state); |
||
864 | } |
||
865 | |||
866 | static inline void netif_tx_disable(struct net_device *dev) |
||
867 | { |
||
868 | spin_lock_bh(&dev->xmit_lock); |
||
869 | netif_stop_queue(dev); |
||
870 | spin_unlock_bh(&dev->xmit_lock); |
||
871 | } |
||
872 | |||
873 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
||
874 | |||
875 | extern void ether_setup(struct net_device *dev); |
||
876 | extern void fddi_setup(struct net_device *dev); |
||
877 | extern void tr_setup(struct net_device *dev); |
||
878 | extern void fc_setup(struct net_device *dev); |
||
879 | extern void fc_freedev(struct net_device *dev); |
||
880 | /* Support for loadable net-drivers */ |
||
881 | extern struct net_device *alloc_netdev(int sizeof_priv, const char *name, |
||
882 | void (*setup)(struct net_device *)); |
||
883 | extern int register_netdev(struct net_device *dev); |
||
884 | extern void unregister_netdev(struct net_device *dev); |
||
885 | /* Functions used for multicast support */ |
||
886 | extern void dev_mc_upload(struct net_device *dev); |
||
887 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); |
||
888 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); |
||
889 | extern void dev_mc_discard(struct net_device *dev); |
||
890 | extern void dev_set_promiscuity(struct net_device *dev, int inc); |
||
891 | extern void dev_set_allmulti(struct net_device *dev, int inc); |
||
892 | extern void netdev_state_change(struct net_device *dev); |
||
893 | /* Load a device via the kmod */ |
||
894 | extern void dev_load(const char *name); |
||
895 | extern void dev_mcast_init(void); |
||
896 | extern int netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev)); |
||
897 | extern void netdev_unregister_fc(int bit); |
||
898 | extern int netdev_max_backlog; |
||
899 | extern int weight_p; |
||
900 | extern unsigned long netdev_fc_xoff; |
||
901 | extern atomic_t netdev_dropping; |
||
902 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); |
||
903 | extern struct sk_buff * skb_checksum_help(struct sk_buff *skb); |
||
904 | #ifdef CONFIG_NET_FASTROUTE |
||
905 | extern int netdev_fastroute; |
||
906 | extern int netdev_fastroute_obstacles; |
||
907 | extern void dev_clear_fastroute(struct net_device *dev); |
||
908 | #endif |
||
909 | |||
910 | #ifdef CONFIG_SYSCTL |
||
911 | extern char *net_sysctl_strdup(const char *s); |
||
912 | #endif |
||
913 | |||
914 | #endif /* __KERNEL__ */ |
||
915 | |||
916 | #endif /* _LINUX_DEV_H */ |