Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * Definitions for the Interfaces handler. |
| 7 | * |
| 8 | * Version: @(#)dev.h 1.0.10 08/12/93 |
| 9 | * |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> |
| 13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> |
Alan Cox | 113aa83 | 2008-10-13 19:01:08 -0700 | [diff] [blame] | 14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | * Bjorn Ekwall. <bj0rn@blox.se> |
| 16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> |
| 17 | * |
| 18 | * This program is free software; you can redistribute it and/or |
| 19 | * modify it under the terms of the GNU General Public License |
| 20 | * as published by the Free Software Foundation; either version |
| 21 | * 2 of the License, or (at your option) any later version. |
| 22 | * |
| 23 | * Moved to /usr/include/linux for NET3 |
| 24 | */ |
| 25 | #ifndef _LINUX_NETDEVICE_H |
| 26 | #define _LINUX_NETDEVICE_H |
| 27 | |
| 28 | #include <linux/if.h> |
| 29 | #include <linux/if_ether.h> |
| 30 | #include <linux/if_packet.h> |
Williams, Mitch A | 95c26df | 2010-02-10 01:43:46 +0000 | [diff] [blame] | 31 | #include <linux/if_link.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | #ifdef __KERNEL__ |
Jean Pihet | e8db0be | 2011-08-25 15:35:03 +0200 | [diff] [blame] | 34 | #include <linux/pm_qos.h> |
Al Viro | d7fe0f2 | 2006-12-03 23:15:30 -0500 | [diff] [blame] | 35 | #include <linux/timer.h> |
Paul Gortmaker | 187f188 | 2011-11-23 20:12:59 -0500 | [diff] [blame] | 36 | #include <linux/bug.h> |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 37 | #include <linux/delay.h> |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 38 | #include <linux/atomic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <asm/cache.h> |
| 40 | #include <asm/byteorder.h> |
| 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/percpu.h> |
David S. Miller | 4d5b78c | 2009-05-06 16:52:51 -0700 | [diff] [blame] | 43 | #include <linux/rculist.h> |
Chris Leech | db21733 | 2006-06-17 21:24:58 -0700 | [diff] [blame] | 44 | #include <linux/dmaengine.h> |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 45 | #include <linux/workqueue.h> |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 46 | #include <linux/dynamic_queue_limits.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Patrick McHardy | b1b67dd | 2009-04-20 04:49:28 +0000 | [diff] [blame] | 48 | #include <linux/ethtool.h> |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 49 | #include <net/net_namespace.h> |
Lennert Buytenhek | cf85d08 | 2008-10-07 13:45:02 +0000 | [diff] [blame] | 50 | #include <net/dsa.h> |
Jeff Kirsher | 7a6b6f5 | 2008-11-25 01:02:08 -0800 | [diff] [blame] | 51 | #ifdef CONFIG_DCB |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 52 | #include <net/dcbnl.h> |
| 53 | #endif |
Neil Horman | 5bc1421 | 2011-11-22 05:10:51 +0000 | [diff] [blame] | 54 | #include <net/netprio_cgroup.h> |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 55 | |
Michał Mirosław | a59e2ec | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 56 | #include <linux/netdev_features.h> |
| 57 | |
Jeff Moyer | 115c1d6 | 2005-06-22 22:05:31 -0700 | [diff] [blame] | 58 | struct netpoll_info; |
Paul Gortmaker | 313162d | 2012-01-30 11:46:54 -0500 | [diff] [blame] | 59 | struct device; |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 60 | struct phy_device; |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 61 | /* 802.11 specific */ |
| 62 | struct wireless_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | /* source back-compat hooks */ |
| 64 | #define SET_ETHTOOL_OPS(netdev,ops) \ |
| 65 | ( (netdev)->ethtool_ops = (ops) ) |
| 66 | |
Stefan Assmann | c1f7942 | 2010-07-22 02:50:21 +0000 | [diff] [blame] | 67 | /* hardware address assignment types */ |
| 68 | #define NET_ADDR_PERM 0 /* address is permanent (default) */ |
| 69 | #define NET_ADDR_RANDOM 1 /* address is generated randomly */ |
| 70 | #define NET_ADDR_STOLEN 2 /* address is stolen from other device */ |
| 71 | |
Jarek Poplawski | 9a1654b | 2009-11-15 07:20:12 +0000 | [diff] [blame] | 72 | /* Backlog congestion levels */ |
| 73 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
| 74 | #define NET_RX_DROP 1 /* packet dropped */ |
| 75 | |
Patrick McHardy | 572a9d7 | 2009-11-10 06:14:14 +0000 | [diff] [blame] | 76 | /* |
| 77 | * Transmit return codes: transmit return codes originate from three different |
| 78 | * namespaces: |
| 79 | * |
| 80 | * - qdisc return codes |
| 81 | * - driver transmit return codes |
| 82 | * - errno values |
| 83 | * |
| 84 | * Drivers are allowed to return any one of those in their hard_start_xmit() |
| 85 | * function. Real network devices commonly used with qdiscs should only return |
| 86 | * the driver transmit return codes though - when qdiscs are used, the actual |
| 87 | * transmission happens asynchronously, so the value is not propagated to |
| 88 | * higher layers. Virtual network devices transmit synchronously, in this case |
| 89 | * the driver transmit return codes are consumed by dev_queue_xmit(), all |
| 90 | * others are propagated to higher layers. |
| 91 | */ |
| 92 | |
| 93 | /* qdisc ->enqueue() return codes. */ |
| 94 | #define NET_XMIT_SUCCESS 0x00 |
Jarek Poplawski | 9a1654b | 2009-11-15 07:20:12 +0000 | [diff] [blame] | 95 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
| 96 | #define NET_XMIT_CN 0x02 /* congestion notification */ |
| 97 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ |
| 98 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
Gerrit Renker | b9df3cb | 2006-11-14 11:21:36 -0200 | [diff] [blame] | 100 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
| 101 | * indicates that the device will soon be dropping packets, or already drops |
| 102 | * some packets of the same priority; prompting us to send less aggressively. */ |
Patrick McHardy | 572a9d7 | 2009-11-10 06:14:14 +0000 | [diff] [blame] | 103 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
| 105 | |
Stephen Hemminger | dc1f8bf | 2009-08-31 19:50:40 +0000 | [diff] [blame] | 106 | /* Driver transmit return codes */ |
Jarek Poplawski | 9a1654b | 2009-11-15 07:20:12 +0000 | [diff] [blame] | 107 | #define NETDEV_TX_MASK 0xf0 |
Patrick McHardy | 572a9d7 | 2009-11-10 06:14:14 +0000 | [diff] [blame] | 108 | |
Stephen Hemminger | dc1f8bf | 2009-08-31 19:50:40 +0000 | [diff] [blame] | 109 | enum netdev_tx { |
Patrick McHardy | 572a9d7 | 2009-11-10 06:14:14 +0000 | [diff] [blame] | 110 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
Jarek Poplawski | 9a1654b | 2009-11-15 07:20:12 +0000 | [diff] [blame] | 111 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
| 112 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ |
| 113 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ |
Stephen Hemminger | dc1f8bf | 2009-08-31 19:50:40 +0000 | [diff] [blame] | 114 | }; |
| 115 | typedef enum netdev_tx netdev_tx_t; |
| 116 | |
Jarek Poplawski | 9a1654b | 2009-11-15 07:20:12 +0000 | [diff] [blame] | 117 | /* |
| 118 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; |
| 119 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. |
| 120 | */ |
| 121 | static inline bool dev_xmit_complete(int rc) |
| 122 | { |
| 123 | /* |
| 124 | * Positive cases with an skb consumed by a driver: |
| 125 | * - successful transmission (rc == NETDEV_TX_OK) |
| 126 | * - error while transmitting (rc < 0) |
| 127 | * - error while queueing to a different device (rc & NET_XMIT_MASK) |
| 128 | */ |
| 129 | if (likely(rc < NET_XMIT_MASK)) |
| 130 | return true; |
| 131 | |
| 132 | return false; |
| 133 | } |
| 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | #endif |
| 136 | |
| 137 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ |
| 138 | |
Vlad Dogaru | 23b41168 | 2011-02-26 22:39:12 +0000 | [diff] [blame] | 139 | /* Initial net device group. All devices belong to group 0 by default. */ |
| 140 | #define INIT_NETDEV_GROUP 0 |
| 141 | |
Adrian Bunk | c88e6f5 | 2008-06-27 19:54:54 -0700 | [diff] [blame] | 142 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | /* |
| 144 | * Compute the worst case header length according to the protocols |
| 145 | * used. |
| 146 | */ |
Graf Yang | fe2918b | 2009-02-05 21:26:19 -0800 | [diff] [blame] | 147 | |
Ben Hutchings | d11ead7 | 2011-11-25 14:40:26 +0000 | [diff] [blame] | 148 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
David S. Miller | 8388e3d | 2008-05-12 20:17:33 -0700 | [diff] [blame] | 149 | # if defined(CONFIG_MAC80211_MESH) |
| 150 | # define LL_MAX_HEADER 128 |
| 151 | # else |
| 152 | # define LL_MAX_HEADER 96 |
| 153 | # endif |
Ben Hutchings | d11ead7 | 2011-11-25 14:40:26 +0000 | [diff] [blame] | 154 | #elif IS_ENABLED(CONFIG_TR) |
David S. Miller | 8388e3d | 2008-05-12 20:17:33 -0700 | [diff] [blame] | 155 | # define LL_MAX_HEADER 48 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | #else |
David S. Miller | 8388e3d | 2008-05-12 20:17:33 -0700 | [diff] [blame] | 157 | # define LL_MAX_HEADER 32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | #endif |
| 159 | |
Ben Hutchings | d11ead7 | 2011-11-25 14:40:26 +0000 | [diff] [blame] | 160 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
| 161 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | #define MAX_HEADER LL_MAX_HEADER |
| 163 | #else |
| 164 | #define MAX_HEADER (LL_MAX_HEADER + 48) |
| 165 | #endif |
| 166 | |
| 167 | /* |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 168 | * Old network device statistics. Fields are native words |
| 169 | * (unsigned long) so they can be read and written atomically. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | */ |
Graf Yang | fe2918b | 2009-02-05 21:26:19 -0800 | [diff] [blame] | 171 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 172 | struct net_device_stats { |
Ben Hutchings | 3cfde79 | 2010-07-09 09:11:52 +0000 | [diff] [blame] | 173 | unsigned long rx_packets; |
| 174 | unsigned long tx_packets; |
| 175 | unsigned long rx_bytes; |
| 176 | unsigned long tx_bytes; |
| 177 | unsigned long rx_errors; |
| 178 | unsigned long tx_errors; |
| 179 | unsigned long rx_dropped; |
| 180 | unsigned long tx_dropped; |
| 181 | unsigned long multicast; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | unsigned long collisions; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | unsigned long rx_length_errors; |
Ben Hutchings | 3cfde79 | 2010-07-09 09:11:52 +0000 | [diff] [blame] | 184 | unsigned long rx_over_errors; |
| 185 | unsigned long rx_crc_errors; |
| 186 | unsigned long rx_frame_errors; |
| 187 | unsigned long rx_fifo_errors; |
| 188 | unsigned long rx_missed_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | unsigned long tx_aborted_errors; |
| 190 | unsigned long tx_carrier_errors; |
| 191 | unsigned long tx_fifo_errors; |
| 192 | unsigned long tx_heartbeat_errors; |
| 193 | unsigned long tx_window_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | unsigned long rx_compressed; |
| 195 | unsigned long tx_compressed; |
| 196 | }; |
| 197 | |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 198 | #endif /* __KERNEL__ */ |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | /* Media selection options. */ |
| 202 | enum { |
| 203 | IF_PORT_UNKNOWN = 0, |
| 204 | IF_PORT_10BASE2, |
| 205 | IF_PORT_10BASET, |
| 206 | IF_PORT_AUI, |
| 207 | IF_PORT_100BASET, |
| 208 | IF_PORT_100BASETX, |
| 209 | IF_PORT_100BASEFX |
| 210 | }; |
| 211 | |
| 212 | #ifdef __KERNEL__ |
| 213 | |
| 214 | #include <linux/cache.h> |
| 215 | #include <linux/skbuff.h> |
| 216 | |
Eric Dumazet | adc9300 | 2011-11-17 03:13:26 +0000 | [diff] [blame] | 217 | #ifdef CONFIG_RPS |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 218 | #include <linux/static_key.h> |
| 219 | extern struct static_key rps_needed; |
Eric Dumazet | adc9300 | 2011-11-17 03:13:26 +0000 | [diff] [blame] | 220 | #endif |
| 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | struct neighbour; |
| 223 | struct neigh_parms; |
| 224 | struct sk_buff; |
| 225 | |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 226 | struct netdev_hw_addr { |
| 227 | struct list_head list; |
| 228 | unsigned char addr[MAX_ADDR_LEN]; |
| 229 | unsigned char type; |
Jiri Pirko | ccffad25 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 230 | #define NETDEV_HW_ADDR_T_LAN 1 |
| 231 | #define NETDEV_HW_ADDR_T_SAN 2 |
| 232 | #define NETDEV_HW_ADDR_T_SLAVE 3 |
| 233 | #define NETDEV_HW_ADDR_T_UNICAST 4 |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 234 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
Jiri Pirko | ccffad25 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 235 | bool synced; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 236 | bool global_use; |
Eric Dumazet | 8f8f103 | 2010-09-19 11:24:02 -0700 | [diff] [blame] | 237 | int refcount; |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 238 | struct rcu_head rcu_head; |
| 239 | }; |
| 240 | |
Jiri Pirko | 31278e7 | 2009-06-17 01:12:19 +0000 | [diff] [blame] | 241 | struct netdev_hw_addr_list { |
| 242 | struct list_head list; |
| 243 | int count; |
| 244 | }; |
| 245 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 246 | #define netdev_hw_addr_list_count(l) ((l)->count) |
| 247 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) |
| 248 | #define netdev_hw_addr_list_for_each(ha, l) \ |
| 249 | list_for_each_entry(ha, &(l)->list, list) |
| 250 | |
| 251 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
| 252 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 253 | #define netdev_for_each_uc_addr(ha, dev) \ |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 254 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) |
Jiri Pirko | 32e7bfc | 2010-01-25 13:36:10 -0800 | [diff] [blame] | 255 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 256 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
| 257 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) |
Pavel Roskin | 18e225f | 2010-04-07 16:40:09 -0700 | [diff] [blame] | 258 | #define netdev_for_each_mc_addr(ha, dev) \ |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 259 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
Jiri Pirko | 6683ece | 2010-02-04 10:22:25 -0800 | [diff] [blame] | 260 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 261 | struct hh_cache { |
David S. Miller | f6b72b6 | 2011-07-14 07:53:20 -0700 | [diff] [blame] | 262 | u16 hh_len; |
David S. Miller | 5c25f68 | 2011-07-13 00:51:10 -0700 | [diff] [blame] | 263 | u16 __pad; |
Stephen Hemminger | 3644f0c | 2006-12-07 15:08:17 -0800 | [diff] [blame] | 264 | seqlock_t hh_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
| 266 | /* cached hardware header; allow for machine alignment needs. */ |
| 267 | #define HH_DATA_MOD 16 |
| 268 | #define HH_DATA_OFF(__len) \ |
Jiri Benc | 5ba0eac | 2005-06-02 16:48:05 -0700 | [diff] [blame] | 269 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | #define HH_DATA_ALIGN(__len) \ |
| 271 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
| 272 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
| 273 | }; |
| 274 | |
| 275 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. |
| 276 | * Alternative is: |
| 277 | * dev->hard_header_len ? (dev->hard_header_len + |
| 278 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
| 279 | * |
| 280 | * We could use other alignment values, but we must maintain the |
| 281 | * relationship HH alignment <= LL alignment. |
| 282 | */ |
| 283 | #define LL_RESERVED_SPACE(dev) \ |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 284 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 286 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 288 | struct header_ops { |
| 289 | int (*create) (struct sk_buff *skb, struct net_device *dev, |
| 290 | unsigned short type, const void *daddr, |
| 291 | const void *saddr, unsigned len); |
| 292 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
| 293 | int (*rebuild)(struct sk_buff *skb); |
David S. Miller | e69dd33 | 2011-07-12 23:28:12 -0700 | [diff] [blame] | 294 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 295 | void (*cache_update)(struct hh_cache *hh, |
| 296 | const struct net_device *dev, |
| 297 | const unsigned char *haddr); |
| 298 | }; |
| 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | /* These flag bits are private to the generic network queueing |
| 301 | * layer, they may not be explicitly referenced by any other |
| 302 | * code. |
| 303 | */ |
| 304 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 305 | enum netdev_state_t { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | __LINK_STATE_START, |
| 307 | __LINK_STATE_PRESENT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | __LINK_STATE_NOCARRIER, |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 309 | __LINK_STATE_LINKWATCH_PENDING, |
| 310 | __LINK_STATE_DORMANT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | }; |
| 312 | |
| 313 | |
| 314 | /* |
| 315 | * This structure holds at boot time configured netdevice settings. They |
Graf Yang | fe2918b | 2009-02-05 21:26:19 -0800 | [diff] [blame] | 316 | * are then used in the device probing. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | */ |
| 318 | struct netdev_boot_setup { |
| 319 | char name[IFNAMSIZ]; |
| 320 | struct ifmap map; |
| 321 | }; |
| 322 | #define NETDEV_BOOT_SETUP_MAX 8 |
| 323 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 324 | extern int __init netdev_boot_setup(char *str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | /* |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 327 | * Structure for NAPI scheduling similar to tasklet but with weighting |
| 328 | */ |
| 329 | struct napi_struct { |
| 330 | /* The poll_list must only be managed by the entity which |
| 331 | * changes the state of the NAPI_STATE_SCHED bit. This means |
| 332 | * whoever atomically sets that bit can add this napi_struct |
| 333 | * to the per-cpu poll_list, and whoever clears that bit |
| 334 | * can remove from the list right before clearing the bit. |
| 335 | */ |
| 336 | struct list_head poll_list; |
| 337 | |
| 338 | unsigned long state; |
| 339 | int weight; |
| 340 | int (*poll)(struct napi_struct *, int); |
| 341 | #ifdef CONFIG_NETPOLL |
| 342 | spinlock_t poll_lock; |
| 343 | int poll_owner; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 344 | #endif |
Herbert Xu | 4ae5544 | 2009-02-08 18:00:36 +0000 | [diff] [blame] | 345 | |
| 346 | unsigned int gro_count; |
| 347 | |
Herbert Xu | 5d38a07 | 2009-01-04 16:13:40 -0800 | [diff] [blame] | 348 | struct net_device *dev; |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 349 | struct list_head dev_list; |
| 350 | struct sk_buff *gro_list; |
Herbert Xu | 5d38a07 | 2009-01-04 16:13:40 -0800 | [diff] [blame] | 351 | struct sk_buff *skb; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 352 | }; |
| 353 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 354 | enum { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 355 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 356 | NAPI_STATE_DISABLE, /* Disable pending */ |
Neil Horman | 7b363e4 | 2008-12-09 23:22:26 -0800 | [diff] [blame] | 357 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 358 | }; |
| 359 | |
Ben Hutchings | 5b252f0 | 2009-10-29 07:17:09 +0000 | [diff] [blame] | 360 | enum gro_result { |
Herbert Xu | d1c76af | 2009-03-16 10:50:02 -0700 | [diff] [blame] | 361 | GRO_MERGED, |
| 362 | GRO_MERGED_FREE, |
| 363 | GRO_HELD, |
| 364 | GRO_NORMAL, |
| 365 | GRO_DROP, |
| 366 | }; |
Ben Hutchings | 5b252f0 | 2009-10-29 07:17:09 +0000 | [diff] [blame] | 367 | typedef enum gro_result gro_result_t; |
Herbert Xu | d1c76af | 2009-03-16 10:50:02 -0700 | [diff] [blame] | 368 | |
Jiri Pirko | 8a4eb57 | 2011-03-12 03:14:39 +0000 | [diff] [blame] | 369 | /* |
| 370 | * enum rx_handler_result - Possible return values for rx_handlers. |
| 371 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it |
| 372 | * further. |
| 373 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in |
| 374 | * case skb->dev was changed by rx_handler. |
| 375 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. |
| 376 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. |
| 377 | * |
| 378 | * rx_handlers are functions called from inside __netif_receive_skb(), to do |
| 379 | * special processing of the skb, prior to delivery to protocol handlers. |
| 380 | * |
| 381 | * Currently, a net_device can only have a single rx_handler registered. Trying |
| 382 | * to register a second rx_handler will return -EBUSY. |
| 383 | * |
| 384 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). |
| 385 | * To unregister a rx_handler on a net_device, use |
| 386 | * netdev_rx_handler_unregister(). |
| 387 | * |
| 388 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to |
| 389 | * do with the skb. |
| 390 | * |
| 391 | * If the rx_handler consumed to skb in some way, it should return |
| 392 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
| 393 | * the skb to be delivered in some other ways. |
| 394 | * |
| 395 | * If the rx_handler changed skb->dev, to divert the skb to another |
| 396 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the |
| 397 | * new device will be called if it exists. |
| 398 | * |
| 399 | * If the rx_handler consider the skb should be ignored, it should return |
| 400 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
| 401 | * are registred on exact device (ptype->dev == skb->dev). |
| 402 | * |
| 403 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally |
| 404 | * delivered, it should return RX_HANDLER_PASS. |
| 405 | * |
| 406 | * A device without a registered rx_handler will behave as if rx_handler |
| 407 | * returned RX_HANDLER_PASS. |
| 408 | */ |
| 409 | |
| 410 | enum rx_handler_result { |
| 411 | RX_HANDLER_CONSUMED, |
| 412 | RX_HANDLER_ANOTHER, |
| 413 | RX_HANDLER_EXACT, |
| 414 | RX_HANDLER_PASS, |
| 415 | }; |
| 416 | typedef enum rx_handler_result rx_handler_result_t; |
| 417 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 418 | |
Harvey Harrison | b3c9752 | 2008-02-13 15:03:15 -0800 | [diff] [blame] | 419 | extern void __napi_schedule(struct napi_struct *n); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 420 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 421 | static inline bool napi_disable_pending(struct napi_struct *n) |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 422 | { |
| 423 | return test_bit(NAPI_STATE_DISABLE, &n->state); |
| 424 | } |
| 425 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 426 | /** |
| 427 | * napi_schedule_prep - check if napi can be scheduled |
| 428 | * @n: napi context |
| 429 | * |
| 430 | * Test if NAPI routine is already running, and if not mark |
| 431 | * it as running. This is used as a condition variable |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 432 | * insure only one NAPI poll instance runs. We also make |
| 433 | * sure there is no pending NAPI disable. |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 434 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 435 | static inline bool napi_schedule_prep(struct napi_struct *n) |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 436 | { |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 437 | return !napi_disable_pending(n) && |
| 438 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | /** |
| 442 | * napi_schedule - schedule NAPI poll |
| 443 | * @n: napi context |
| 444 | * |
| 445 | * Schedule NAPI poll routine to be called if it is not already |
| 446 | * running. |
| 447 | */ |
| 448 | static inline void napi_schedule(struct napi_struct *n) |
| 449 | { |
| 450 | if (napi_schedule_prep(n)) |
| 451 | __napi_schedule(n); |
| 452 | } |
| 453 | |
Roland Dreier | bfe13f5 | 2007-10-09 15:47:37 -0700 | [diff] [blame] | 454 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 455 | static inline bool napi_reschedule(struct napi_struct *napi) |
Roland Dreier | bfe13f5 | 2007-10-09 15:47:37 -0700 | [diff] [blame] | 456 | { |
| 457 | if (napi_schedule_prep(napi)) { |
| 458 | __napi_schedule(napi); |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 459 | return true; |
Roland Dreier | bfe13f5 | 2007-10-09 15:47:37 -0700 | [diff] [blame] | 460 | } |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 461 | return false; |
Roland Dreier | bfe13f5 | 2007-10-09 15:47:37 -0700 | [diff] [blame] | 462 | } |
| 463 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 464 | /** |
| 465 | * napi_complete - NAPI processing complete |
| 466 | * @n: napi context |
| 467 | * |
| 468 | * Mark NAPI processing as complete. |
| 469 | */ |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 470 | extern void __napi_complete(struct napi_struct *n); |
| 471 | extern void napi_complete(struct napi_struct *n); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 472 | |
| 473 | /** |
| 474 | * napi_disable - prevent NAPI from scheduling |
| 475 | * @n: napi context |
| 476 | * |
| 477 | * Stop NAPI from being scheduled on this context. |
| 478 | * Waits till any outstanding processing completes. |
| 479 | */ |
| 480 | static inline void napi_disable(struct napi_struct *n) |
| 481 | { |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 482 | set_bit(NAPI_STATE_DISABLE, &n->state); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 483 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
Benjamin Herrenschmidt | 43cc738 | 2007-10-26 04:23:22 -0700 | [diff] [blame] | 484 | msleep(1); |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 485 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | /** |
| 489 | * napi_enable - enable NAPI scheduling |
| 490 | * @n: napi context |
| 491 | * |
| 492 | * Resume NAPI from being scheduled on this context. |
| 493 | * Must be paired with napi_disable. |
| 494 | */ |
| 495 | static inline void napi_enable(struct napi_struct *n) |
| 496 | { |
| 497 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); |
| 498 | smp_mb__before_clear_bit(); |
| 499 | clear_bit(NAPI_STATE_SCHED, &n->state); |
| 500 | } |
| 501 | |
Stephen Hemminger | c264c3d | 2007-10-17 13:26:41 -0700 | [diff] [blame] | 502 | #ifdef CONFIG_SMP |
| 503 | /** |
| 504 | * napi_synchronize - wait until NAPI is not running |
| 505 | * @n: napi context |
| 506 | * |
| 507 | * Wait until NAPI is done being scheduled on this context. |
| 508 | * Waits till any outstanding processing completes but |
| 509 | * does not disable future activations. |
| 510 | */ |
| 511 | static inline void napi_synchronize(const struct napi_struct *n) |
| 512 | { |
| 513 | while (test_bit(NAPI_STATE_SCHED, &n->state)) |
| 514 | msleep(1); |
| 515 | } |
| 516 | #else |
| 517 | # define napi_synchronize(n) barrier() |
| 518 | #endif |
| 519 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 520 | enum netdev_queue_state_t { |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 521 | __QUEUE_STATE_DRV_XOFF, |
| 522 | __QUEUE_STATE_STACK_XOFF, |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 523 | __QUEUE_STATE_FROZEN, |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 524 | #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ |
| 525 | (1 << __QUEUE_STATE_STACK_XOFF)) |
| 526 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ |
| 527 | (1 << __QUEUE_STATE_FROZEN)) |
David S. Miller | 79d1638 | 2008-07-08 23:14:46 -0700 | [diff] [blame] | 528 | }; |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 529 | /* |
| 530 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The |
| 531 | * netif_tx_* functions below are used to manipulate this flag. The |
| 532 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit |
| 533 | * queue independently. The netif_xmit_*stopped functions below are called |
| 534 | * to check if the queue has been stopped by the driver or stack (either |
| 535 | * of the XOFF bits are set in the state). Drivers should not need to call |
| 536 | * netif_xmit*stopped functions, they should only be using netif_tx_*. |
| 537 | */ |
David S. Miller | 79d1638 | 2008-07-08 23:14:46 -0700 | [diff] [blame] | 538 | |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 539 | struct netdev_queue { |
Eric Dumazet | 6a321cb | 2009-04-28 04:43:42 -0700 | [diff] [blame] | 540 | /* |
| 541 | * read mostly part |
| 542 | */ |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 543 | struct net_device *dev; |
David S. Miller | b0e1e64 | 2008-07-08 17:42:10 -0700 | [diff] [blame] | 544 | struct Qdisc *qdisc; |
| 545 | struct Qdisc *qdisc_sleeping; |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 546 | #ifdef CONFIG_SYSFS |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 547 | struct kobject kobj; |
| 548 | #endif |
Eric Dumazet | f2cd2d3 | 2010-11-29 08:14:37 +0000 | [diff] [blame] | 549 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| 550 | int numa_node; |
| 551 | #endif |
Eric Dumazet | 6a321cb | 2009-04-28 04:43:42 -0700 | [diff] [blame] | 552 | /* |
| 553 | * write mostly part |
| 554 | */ |
| 555 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
| 556 | int xmit_lock_owner; |
Eric Dumazet | 9d21493 | 2009-05-17 20:55:16 -0700 | [diff] [blame] | 557 | /* |
| 558 | * please use this field instead of dev->trans_start |
| 559 | */ |
| 560 | unsigned long trans_start; |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 561 | |
| 562 | /* |
| 563 | * Number of TX timeouts for this queue |
| 564 | * (/sys/class/net/DEV/Q/trans_timeout) |
| 565 | */ |
| 566 | unsigned long trans_timeout; |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 567 | |
| 568 | unsigned long state; |
| 569 | |
| 570 | #ifdef CONFIG_BQL |
| 571 | struct dql dql; |
| 572 | #endif |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 573 | } ____cacheline_aligned_in_smp; |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 574 | |
Eric Dumazet | f2cd2d3 | 2010-11-29 08:14:37 +0000 | [diff] [blame] | 575 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
| 576 | { |
| 577 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| 578 | return q->numa_node; |
| 579 | #else |
Changli Gao | b236da6 | 2010-12-14 03:09:15 +0000 | [diff] [blame] | 580 | return NUMA_NO_NODE; |
Eric Dumazet | f2cd2d3 | 2010-11-29 08:14:37 +0000 | [diff] [blame] | 581 | #endif |
| 582 | } |
| 583 | |
| 584 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) |
| 585 | { |
| 586 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| 587 | q->numa_node = node; |
| 588 | #endif |
| 589 | } |
| 590 | |
Eric Dumazet | df33454 | 2010-03-24 19:13:54 +0000 | [diff] [blame] | 591 | #ifdef CONFIG_RPS |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 592 | /* |
| 593 | * This structure holds an RPS map which can be of variable length. The |
| 594 | * map is an array of CPUs. |
| 595 | */ |
| 596 | struct rps_map { |
| 597 | unsigned int len; |
| 598 | struct rcu_head rcu; |
| 599 | u16 cpus[0]; |
| 600 | }; |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 601 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 602 | |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 603 | /* |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 604 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
| 605 | * tail pointer for that CPU's input queue at the time of last enqueue, and |
| 606 | * a hardware filter index. |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 607 | */ |
| 608 | struct rps_dev_flow { |
| 609 | u16 cpu; |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 610 | u16 filter; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 611 | unsigned int last_qtail; |
| 612 | }; |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 613 | #define RPS_NO_FILTER 0xffff |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 614 | |
| 615 | /* |
| 616 | * The rps_dev_flow_table structure contains a table of flow mappings. |
| 617 | */ |
| 618 | struct rps_dev_flow_table { |
| 619 | unsigned int mask; |
| 620 | struct rcu_head rcu; |
| 621 | struct work_struct free_work; |
| 622 | struct rps_dev_flow flows[0]; |
| 623 | }; |
| 624 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 625 | ((_num) * sizeof(struct rps_dev_flow))) |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 626 | |
| 627 | /* |
| 628 | * The rps_sock_flow_table contains mappings of flows to the last CPU |
| 629 | * on which they were processed by the application (set in recvmsg). |
| 630 | */ |
| 631 | struct rps_sock_flow_table { |
| 632 | unsigned int mask; |
| 633 | u16 ents[0]; |
| 634 | }; |
| 635 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 636 | ((_num) * sizeof(u16))) |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 637 | |
| 638 | #define RPS_NO_CPU 0xffff |
| 639 | |
| 640 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
| 641 | u32 hash) |
| 642 | { |
| 643 | if (table && hash) { |
| 644 | unsigned int cpu, index = hash & table->mask; |
| 645 | |
| 646 | /* We only give a hint, preemption can change cpu under us */ |
| 647 | cpu = raw_smp_processor_id(); |
| 648 | |
| 649 | if (table->ents[index] != cpu) |
| 650 | table->ents[index] = cpu; |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, |
| 655 | u32 hash) |
| 656 | { |
| 657 | if (table && hash) |
| 658 | table->ents[hash & table->mask] = RPS_NO_CPU; |
| 659 | } |
| 660 | |
Eric Dumazet | 6e3f7fa | 2010-10-25 03:02:02 +0000 | [diff] [blame] | 661 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 662 | |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 663 | #ifdef CONFIG_RFS_ACCEL |
| 664 | extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, |
| 665 | u32 flow_id, u16 filter_id); |
| 666 | #endif |
| 667 | |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 668 | /* This structure contains an instance of an RX queue. */ |
| 669 | struct netdev_rx_queue { |
Eric Dumazet | 6e3f7fa | 2010-10-25 03:02:02 +0000 | [diff] [blame] | 670 | struct rps_map __rcu *rps_map; |
| 671 | struct rps_dev_flow_table __rcu *rps_flow_table; |
| 672 | struct kobject kobj; |
Tom Herbert | fe82224 | 2010-11-09 10:47:38 +0000 | [diff] [blame] | 673 | struct net_device *dev; |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 674 | } ____cacheline_aligned_in_smp; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 675 | #endif /* CONFIG_RPS */ |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 676 | |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 677 | #ifdef CONFIG_XPS |
| 678 | /* |
| 679 | * This structure holds an XPS map which can be of variable length. The |
| 680 | * map is an array of queues. |
| 681 | */ |
| 682 | struct xps_map { |
| 683 | unsigned int len; |
| 684 | unsigned int alloc_len; |
| 685 | struct rcu_head rcu; |
| 686 | u16 queues[0]; |
| 687 | }; |
Eric Dumazet | 60b778c | 2011-12-24 06:56:49 +0000 | [diff] [blame] | 688 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 689 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
| 690 | / sizeof(u16)) |
| 691 | |
| 692 | /* |
| 693 | * This structure holds all XPS maps for device. Maps are indexed by CPU. |
| 694 | */ |
| 695 | struct xps_dev_maps { |
| 696 | struct rcu_head rcu; |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 697 | struct xps_map __rcu *cpu_map[0]; |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 698 | }; |
| 699 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ |
| 700 | (nr_cpu_ids * sizeof(struct xps_map *))) |
| 701 | #endif /* CONFIG_XPS */ |
| 702 | |
John Fastabend | 4f57c08 | 2011-01-17 08:06:04 +0000 | [diff] [blame] | 703 | #define TC_MAX_QUEUE 16 |
| 704 | #define TC_BITMASK 15 |
| 705 | /* HW offloaded queuing disciplines txq count and offset maps */ |
| 706 | struct netdev_tc_txq { |
| 707 | u16 count; |
| 708 | u16 offset; |
| 709 | }; |
| 710 | |
Neerav Parikh | 68bad94 | 2012-01-04 20:23:39 +0000 | [diff] [blame] | 711 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| 712 | /* |
| 713 | * This structure is to hold information about the device |
| 714 | * configured to run FCoE protocol stack. |
| 715 | */ |
| 716 | struct netdev_fcoe_hbainfo { |
| 717 | char manufacturer[64]; |
| 718 | char serial_number[64]; |
| 719 | char hardware_version[64]; |
| 720 | char driver_version[64]; |
| 721 | char optionrom_version[64]; |
| 722 | char firmware_version[64]; |
| 723 | char model[256]; |
| 724 | char model_description[256]; |
| 725 | }; |
| 726 | #endif |
| 727 | |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 728 | /* |
| 729 | * This structure defines the management hooks for network devices. |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 730 | * The following hooks can be defined; unless noted otherwise, they are |
| 731 | * optional and can be filled with a null pointer. |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 732 | * |
| 733 | * int (*ndo_init)(struct net_device *dev); |
| 734 | * This function is called once when network device is registered. |
| 735 | * The network device can use this to any late stage initializaton |
| 736 | * or semantic validattion. It can fail with an error code which will |
| 737 | * be propogated back to register_netdev |
| 738 | * |
| 739 | * void (*ndo_uninit)(struct net_device *dev); |
| 740 | * This function is called when device is unregistered or when registration |
| 741 | * fails. It is not called if init fails. |
| 742 | * |
| 743 | * int (*ndo_open)(struct net_device *dev); |
| 744 | * This function is called when network device transistions to the up |
| 745 | * state. |
| 746 | * |
| 747 | * int (*ndo_stop)(struct net_device *dev); |
| 748 | * This function is called when network device transistions to the down |
| 749 | * state. |
| 750 | * |
Stephen Hemminger | dc1f8bf | 2009-08-31 19:50:40 +0000 | [diff] [blame] | 751 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
| 752 | * struct net_device *dev); |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 753 | * Called when a packet needs to be transmitted. |
Stephen Hemminger | dc1f8bf | 2009-08-31 19:50:40 +0000 | [diff] [blame] | 754 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
| 755 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 756 | * Required can not be NULL. |
| 757 | * |
| 758 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); |
| 759 | * Called to decide which queue to when device supports multiple |
| 760 | * transmit queues. |
| 761 | * |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 762 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
| 763 | * This function is called to allow device receiver to make |
| 764 | * changes to configuration when multicast or promiscious is enabled. |
| 765 | * |
| 766 | * void (*ndo_set_rx_mode)(struct net_device *dev); |
| 767 | * This function is called device changes address list filtering. |
Jiri Pirko | 0178934 | 2011-08-16 06:29:00 +0000 | [diff] [blame] | 768 | * If driver handles unicast address filtering, it should set |
| 769 | * IFF_UNICAST_FLT to its priv_flags. |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 770 | * |
| 771 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); |
| 772 | * This function is called when the Media Access Control address |
Mike Rapoport | 37b607c | 2009-04-27 05:45:54 -0700 | [diff] [blame] | 773 | * needs to be changed. If this interface is not defined, the |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 774 | * mac address can not be changed. |
| 775 | * |
| 776 | * int (*ndo_validate_addr)(struct net_device *dev); |
| 777 | * Test if Media Access Control address is valid for the device. |
| 778 | * |
| 779 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); |
| 780 | * Called when a user request an ioctl which can't be handled by |
| 781 | * the generic interface code. If not defined ioctl's return |
| 782 | * not supported error code. |
| 783 | * |
| 784 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); |
| 785 | * Used to set network devices bus interface parameters. This interface |
| 786 | * is retained for legacy reason, new devices should use the bus |
| 787 | * interface (PCI) for low level management. |
| 788 | * |
| 789 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); |
| 790 | * Called when a user wants to change the Maximum Transfer Unit |
| 791 | * of a device. If not defined, any request to change MTU will |
| 792 | * will return an error. |
| 793 | * |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 794 | * void (*ndo_tx_timeout)(struct net_device *dev); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 795 | * Callback uses when the transmitter has not made any progress |
| 796 | * for dev->watchdog ticks. |
| 797 | * |
Ben Hutchings | 3cfde79 | 2010-07-09 09:11:52 +0000 | [diff] [blame] | 798 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
Eric Dumazet | 2817273 | 2010-07-07 14:58:56 -0700 | [diff] [blame] | 799 | * struct rtnl_link_stats64 *storage); |
Wolfram Sang | d308e38 | 2009-10-07 13:53:11 -0700 | [diff] [blame] | 800 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 801 | * Called when a user wants to get the network device usage |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 802 | * statistics. Drivers must do one of the following: |
Ben Hutchings | 3cfde79 | 2010-07-09 09:11:52 +0000 | [diff] [blame] | 803 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
| 804 | * rtnl_link_stats64 structure passed by the caller. |
Ben Hutchings | 82695d9 | 2010-06-15 15:08:48 -0700 | [diff] [blame] | 805 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
Ben Hutchings | be1f3c2 | 2010-06-08 07:19:54 +0000 | [diff] [blame] | 806 | * (which should normally be dev->stats) and return a pointer to |
| 807 | * it. The structure may be changed asynchronously only if each |
| 808 | * field is written atomically. |
| 809 | * 3. Update dev->stats asynchronously and atomically, and define |
| 810 | * neither operation. |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 811 | * |
Jiri Pirko | 8e58613 | 2011-12-08 19:52:37 -0500 | [diff] [blame] | 812 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 813 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) |
| 814 | * this function is called when a VLAN id is registered. |
| 815 | * |
Jiri Pirko | 8e58613 | 2011-12-08 19:52:37 -0500 | [diff] [blame] | 816 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 817 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) |
| 818 | * this function is called when a VLAN id is unregistered. |
| 819 | * |
| 820 | * void (*ndo_poll_controller)(struct net_device *dev); |
Williams, Mitch A | 95c26df | 2010-02-10 01:43:46 +0000 | [diff] [blame] | 821 | * |
| 822 | * SR-IOV management functions. |
| 823 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); |
| 824 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); |
| 825 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); |
Greg Rose | 5f8444a | 2011-10-08 03:05:24 +0000 | [diff] [blame] | 826 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
Williams, Mitch A | 95c26df | 2010-02-10 01:43:46 +0000 | [diff] [blame] | 827 | * int (*ndo_get_vf_config)(struct net_device *dev, |
| 828 | * int vf, struct ifla_vf_info *ivf); |
Scott Feldman | 57b6108 | 2010-05-17 22:49:55 -0700 | [diff] [blame] | 829 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
| 830 | * struct nlattr *port[]); |
| 831 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
John Fastabend | 4f57c08 | 2011-01-17 08:06:04 +0000 | [diff] [blame] | 832 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
| 833 | * Called to setup 'tc' number of traffic classes in the net device. This |
| 834 | * is always called from the stack with the rtnl lock held and netif tx |
| 835 | * queues stopped. This allows the netdevice to perform queue management |
| 836 | * safely. |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 837 | * |
Yi Zou | e9bce84 | 2011-03-09 08:48:03 +0000 | [diff] [blame] | 838 | * Fiber Channel over Ethernet (FCoE) offload functions. |
| 839 | * int (*ndo_fcoe_enable)(struct net_device *dev); |
| 840 | * Called when the FCoE protocol stack wants to start using LLD for FCoE |
| 841 | * so the underlying device can perform whatever needed configuration or |
| 842 | * initialization to support acceleration of FCoE traffic. |
| 843 | * |
| 844 | * int (*ndo_fcoe_disable)(struct net_device *dev); |
| 845 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE |
| 846 | * so the underlying device can perform whatever needed clean-ups to |
| 847 | * stop supporting acceleration of FCoE traffic. |
| 848 | * |
| 849 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, |
| 850 | * struct scatterlist *sgl, unsigned int sgc); |
| 851 | * Called when the FCoE Initiator wants to initialize an I/O that |
| 852 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| 853 | * perform necessary setup and returns 1 to indicate the device is set up |
| 854 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
| 855 | * |
| 856 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); |
| 857 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as |
| 858 | * indicated by the FC exchange id 'xid', so the underlying device can |
| 859 | * clean up and reuse resources for later DDP requests. |
| 860 | * |
| 861 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, |
| 862 | * struct scatterlist *sgl, unsigned int sgc); |
| 863 | * Called when the FCoE Target wants to initialize an I/O that |
| 864 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| 865 | * perform necessary setup and returns 1 to indicate the device is set up |
| 866 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
| 867 | * |
Neerav Parikh | 68bad94 | 2012-01-04 20:23:39 +0000 | [diff] [blame] | 868 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| 869 | * struct netdev_fcoe_hbainfo *hbainfo); |
| 870 | * Called when the FCoE Protocol stack wants information on the underlying |
| 871 | * device. This information is utilized by the FCoE protocol stack to |
| 872 | * register attributes with Fiber Channel management service as per the |
| 873 | * FC-GS Fabric Device Management Information(FDMI) specification. |
| 874 | * |
Yi Zou | e9bce84 | 2011-03-09 08:48:03 +0000 | [diff] [blame] | 875 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
| 876 | * Called when the underlying device wants to override default World Wide |
| 877 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own |
| 878 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE |
| 879 | * protocol stack to use. |
| 880 | * |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 881 | * RFS acceleration. |
| 882 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, |
| 883 | * u16 rxq_index, u32 flow_id); |
| 884 | * Set hardware filter for RFS. rxq_index is the target queue index; |
| 885 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. |
| 886 | * Return the filter ID on success, or a negative error code. |
Jiri Pirko | fbaec0e | 2011-02-13 10:15:37 +0000 | [diff] [blame] | 887 | * |
| 888 | * Slave management functions (for bridge, bonding, etc). User should |
| 889 | * call netdev_set_master() to set dev->master properly. |
| 890 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
| 891 | * Called to make another netdev an underling. |
| 892 | * |
| 893 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); |
| 894 | * Called to release previously enslaved netdev. |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 895 | * |
| 896 | * Feature/offload setting functions. |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 897 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
| 898 | * netdev_features_t features); |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 899 | * Adjusts the requested feature flags according to device-specific |
| 900 | * constraints, and returns the resulting flags. Must not modify |
| 901 | * the device state. |
| 902 | * |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 903 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 904 | * Called to update device configuration to new features. Passed |
| 905 | * feature set might be less than what was returned by ndo_fix_features()). |
| 906 | * Must return >0 or -errno if it changed dev->features itself. |
| 907 | * |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 908 | */ |
| 909 | struct net_device_ops { |
| 910 | int (*ndo_init)(struct net_device *dev); |
| 911 | void (*ndo_uninit)(struct net_device *dev); |
| 912 | int (*ndo_open)(struct net_device *dev); |
| 913 | int (*ndo_stop)(struct net_device *dev); |
Stephen Hemminger | dc1f8bf | 2009-08-31 19:50:40 +0000 | [diff] [blame] | 914 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 915 | struct net_device *dev); |
| 916 | u16 (*ndo_select_queue)(struct net_device *dev, |
| 917 | struct sk_buff *skb); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 918 | void (*ndo_change_rx_flags)(struct net_device *dev, |
| 919 | int flags); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 920 | void (*ndo_set_rx_mode)(struct net_device *dev); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 921 | int (*ndo_set_mac_address)(struct net_device *dev, |
| 922 | void *addr); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 923 | int (*ndo_validate_addr)(struct net_device *dev); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 924 | int (*ndo_do_ioctl)(struct net_device *dev, |
| 925 | struct ifreq *ifr, int cmd); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 926 | int (*ndo_set_config)(struct net_device *dev, |
| 927 | struct ifmap *map); |
Stephen Hemminger | 0082982 | 2008-11-20 20:14:53 -0800 | [diff] [blame] | 928 | int (*ndo_change_mtu)(struct net_device *dev, |
| 929 | int new_mtu); |
| 930 | int (*ndo_neigh_setup)(struct net_device *dev, |
| 931 | struct neigh_parms *); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 932 | void (*ndo_tx_timeout) (struct net_device *dev); |
| 933 | |
Eric Dumazet | 2817273 | 2010-07-07 14:58:56 -0700 | [diff] [blame] | 934 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
| 935 | struct rtnl_link_stats64 *storage); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 936 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| 937 | |
Jiri Pirko | 8e58613 | 2011-12-08 19:52:37 -0500 | [diff] [blame] | 938 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 939 | unsigned short vid); |
Jiri Pirko | 8e58613 | 2011-12-08 19:52:37 -0500 | [diff] [blame] | 940 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 941 | unsigned short vid); |
| 942 | #ifdef CONFIG_NET_POLL_CONTROLLER |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 943 | void (*ndo_poll_controller)(struct net_device *dev); |
Herbert Xu | 4247e16 | 2010-06-10 16:12:47 +0000 | [diff] [blame] | 944 | int (*ndo_netpoll_setup)(struct net_device *dev, |
| 945 | struct netpoll_info *info); |
WANG Cong | 0e34e93 | 2010-05-06 00:47:21 -0700 | [diff] [blame] | 946 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 947 | #endif |
Williams, Mitch A | 95c26df | 2010-02-10 01:43:46 +0000 | [diff] [blame] | 948 | int (*ndo_set_vf_mac)(struct net_device *dev, |
| 949 | int queue, u8 *mac); |
| 950 | int (*ndo_set_vf_vlan)(struct net_device *dev, |
| 951 | int queue, u16 vlan, u8 qos); |
| 952 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, |
| 953 | int vf, int rate); |
Greg Rose | 5f8444a | 2011-10-08 03:05:24 +0000 | [diff] [blame] | 954 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
| 955 | int vf, bool setting); |
Williams, Mitch A | 95c26df | 2010-02-10 01:43:46 +0000 | [diff] [blame] | 956 | int (*ndo_get_vf_config)(struct net_device *dev, |
| 957 | int vf, |
| 958 | struct ifla_vf_info *ivf); |
Scott Feldman | 57b6108 | 2010-05-17 22:49:55 -0700 | [diff] [blame] | 959 | int (*ndo_set_vf_port)(struct net_device *dev, |
| 960 | int vf, |
| 961 | struct nlattr *port[]); |
| 962 | int (*ndo_get_vf_port)(struct net_device *dev, |
| 963 | int vf, struct sk_buff *skb); |
John Fastabend | 4f57c08 | 2011-01-17 08:06:04 +0000 | [diff] [blame] | 964 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
Ben Hutchings | d11ead7 | 2011-11-25 14:40:26 +0000 | [diff] [blame] | 965 | #if IS_ENABLED(CONFIG_FCOE) |
Yi Zou | cb45439 | 2009-08-31 12:31:36 +0000 | [diff] [blame] | 966 | int (*ndo_fcoe_enable)(struct net_device *dev); |
| 967 | int (*ndo_fcoe_disable)(struct net_device *dev); |
Yi Zou | 4d288d5 | 2009-02-27 14:06:59 -0800 | [diff] [blame] | 968 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
| 969 | u16 xid, |
| 970 | struct scatterlist *sgl, |
| 971 | unsigned int sgc); |
| 972 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, |
| 973 | u16 xid); |
Yi Zou | 6247e08 | 2011-02-01 07:22:06 +0000 | [diff] [blame] | 974 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
| 975 | u16 xid, |
| 976 | struct scatterlist *sgl, |
| 977 | unsigned int sgc); |
Neerav Parikh | 68bad94 | 2012-01-04 20:23:39 +0000 | [diff] [blame] | 978 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| 979 | struct netdev_fcoe_hbainfo *hbainfo); |
Bhanu Prakash Gollapudi | 3c9c36bc | 2011-08-26 09:45:41 +0000 | [diff] [blame] | 980 | #endif |
| 981 | |
Ben Hutchings | d11ead7 | 2011-11-25 14:40:26 +0000 | [diff] [blame] | 982 | #if IS_ENABLED(CONFIG_LIBFCOE) |
Yi Zou | df5c794 | 2009-10-28 18:24:35 +0000 | [diff] [blame] | 983 | #define NETDEV_FCOE_WWNN 0 |
| 984 | #define NETDEV_FCOE_WWPN 1 |
| 985 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, |
| 986 | u64 *wwn, int type); |
Yi Zou | 4d288d5 | 2009-02-27 14:06:59 -0800 | [diff] [blame] | 987 | #endif |
Bhanu Prakash Gollapudi | 3c9c36bc | 2011-08-26 09:45:41 +0000 | [diff] [blame] | 988 | |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 989 | #ifdef CONFIG_RFS_ACCEL |
| 990 | int (*ndo_rx_flow_steer)(struct net_device *dev, |
| 991 | const struct sk_buff *skb, |
| 992 | u16 rxq_index, |
| 993 | u32 flow_id); |
| 994 | #endif |
Jiri Pirko | fbaec0e | 2011-02-13 10:15:37 +0000 | [diff] [blame] | 995 | int (*ndo_add_slave)(struct net_device *dev, |
| 996 | struct net_device *slave_dev); |
| 997 | int (*ndo_del_slave)(struct net_device *dev, |
| 998 | struct net_device *slave_dev); |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 999 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
| 1000 | netdev_features_t features); |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 1001 | int (*ndo_set_features)(struct net_device *dev, |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 1002 | netdev_features_t features); |
David Miller | da6a8fa | 2011-07-25 00:01:38 +0000 | [diff] [blame] | 1003 | int (*ndo_neigh_construct)(struct neighbour *n); |
David S. Miller | 447f219 | 2011-12-19 15:04:41 -0500 | [diff] [blame] | 1004 | void (*ndo_neigh_destroy)(struct neighbour *n); |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 1005 | }; |
| 1006 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1007 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | * The DEVICE structure. |
| 1009 | * Actually, this whole structure is a big mistake. It mixes I/O |
| 1010 | * data with strictly "high-level" data, and it has to know about |
| 1011 | * almost every data structure used in the INET module. |
| 1012 | * |
| 1013 | * FIXME: cleanup struct net_device such that network protocol info |
| 1014 | * moves out. |
| 1015 | */ |
| 1016 | |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 1017 | struct net_device { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | |
| 1019 | /* |
| 1020 | * This is the first field of the "visible" part of this structure |
| 1021 | * (i.e. as seen by users in the "Space.c" file). It is the name |
Justin P. Mattock | 724df61 | 2010-05-26 09:22:40 -0700 | [diff] [blame] | 1022 | * of the interface. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | */ |
| 1024 | char name[IFNAMSIZ]; |
Mark Gross | ed77134 | 2010-05-06 01:59:26 +0200 | [diff] [blame] | 1025 | |
Jean Pihet | cc74998 | 2011-08-25 15:35:12 +0200 | [diff] [blame] | 1026 | struct pm_qos_request pm_qos_req; |
Mark Gross | ed77134 | 2010-05-06 01:59:26 +0200 | [diff] [blame] | 1027 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1028 | /* device name hash chain */ |
| 1029 | struct hlist_node name_hlist; |
Stephen Hemminger | 0b815a1 | 2008-09-22 21:28:11 -0700 | [diff] [blame] | 1030 | /* snmp alias */ |
| 1031 | char *ifalias; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | |
| 1033 | /* |
| 1034 | * I/O specific fields |
| 1035 | * FIXME: Merge these and struct ifmap into one |
| 1036 | */ |
| 1037 | unsigned long mem_end; /* shared mem end */ |
| 1038 | unsigned long mem_start; /* shared mem start */ |
| 1039 | unsigned long base_addr; /* device I/O address */ |
| 1040 | unsigned int irq; /* device IRQ number */ |
| 1041 | |
| 1042 | /* |
| 1043 | * Some hardware also needs these fields, but they are not |
| 1044 | * part of the usual set specified in Space.c. |
| 1045 | */ |
| 1046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | unsigned long state; |
| 1048 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1049 | struct list_head dev_list; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1050 | struct list_head napi_list; |
Eric Dumazet | 44a0873 | 2009-10-27 07:03:04 +0000 | [diff] [blame] | 1051 | struct list_head unreg_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 1053 | /* currently active device features */ |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 1054 | netdev_features_t features; |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 1055 | /* user-changeable features */ |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 1056 | netdev_features_t hw_features; |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 1057 | /* user-requested features */ |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 1058 | netdev_features_t wanted_features; |
Michał Mirosław | 1aac626 | 2011-04-12 04:07:39 +0000 | [diff] [blame] | 1059 | /* mask of features inheritable by VLAN devices */ |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 1060 | netdev_features_t vlan_features; |
Michał Mirosław | 04ed3e7 | 2011-01-24 15:32:47 -0800 | [diff] [blame] | 1061 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | /* Interface index. Unique device identifier */ |
| 1063 | int ifindex; |
| 1064 | int iflink; |
| 1065 | |
Rusty Russell | c45d286 | 2007-03-28 14:29:08 -0700 | [diff] [blame] | 1066 | struct net_device_stats stats; |
Eric Dumazet | caf586e | 2010-09-30 21:06:55 +0000 | [diff] [blame] | 1067 | atomic_long_t rx_dropped; /* dropped packets by core network |
| 1068 | * Do not use this in drivers. |
| 1069 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | |
Johannes Berg | b86e028 | 2007-04-26 20:48:23 -0700 | [diff] [blame] | 1071 | #ifdef CONFIG_WIRELESS_EXT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
| 1073 | * See <net/iw_handler.h> for details. Jean II */ |
| 1074 | const struct iw_handler_def * wireless_handlers; |
| 1075 | /* Instance data managed by the core of Wireless Extensions. */ |
| 1076 | struct iw_public_data * wireless_data; |
Johannes Berg | b86e028 | 2007-04-26 20:48:23 -0700 | [diff] [blame] | 1077 | #endif |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 1078 | /* Management operations */ |
| 1079 | const struct net_device_ops *netdev_ops; |
Stephen Hemminger | 76fd859 | 2006-09-08 11:16:13 -0700 | [diff] [blame] | 1080 | const struct ethtool_ops *ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 1082 | /* Hardware header description */ |
| 1083 | const struct header_ops *header_ops; |
| 1084 | |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 1085 | unsigned int flags; /* interface flags (a la BSD) */ |
Ben Greear | 3bdc0eb | 2012-02-11 15:39:30 +0000 | [diff] [blame] | 1086 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
| 1087 | * See if.h for definitions. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | unsigned short gflags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
| 1090 | |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 1091 | unsigned char operstate; /* RFC2863 operstate */ |
| 1092 | unsigned char link_mode; /* mapping policy to operstate */ |
| 1093 | |
Joe Perches | bdc220d | 2011-05-09 17:42:46 +0000 | [diff] [blame] | 1094 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
| 1095 | unsigned char dma; /* DMA channel */ |
| 1096 | |
David S. Miller | cd7b539 | 2010-05-02 22:27:59 -0700 | [diff] [blame] | 1097 | unsigned int mtu; /* interface MTU value */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | unsigned short type; /* interface hardware type */ |
| 1099 | unsigned short hard_header_len; /* hardware hdr length */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 1101 | /* extra head- and tailroom the hardware may need, but not in all cases |
| 1102 | * can this be guaranteed, especially tailroom. Some cases also use |
| 1103 | * LL_MAX_HEADER instead to allocate the skb. |
| 1104 | */ |
| 1105 | unsigned short needed_headroom; |
| 1106 | unsigned short needed_tailroom; |
| 1107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | /* Interface address info. */ |
Jon Wetzel | a6f9a70 | 2005-08-20 17:15:54 -0700 | [diff] [blame] | 1109 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
Stefan Assmann | c1f7942 | 2010-07-22 02:50:21 +0000 | [diff] [blame] | 1110 | unsigned char addr_assign_type; /* hw address assignment type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | unsigned char addr_len; /* hardware address length */ |
David Miller | 596b9b6 | 2011-07-25 00:01:25 +0000 | [diff] [blame] | 1112 | unsigned char neigh_priv_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | unsigned short dev_id; /* for shared network cards */ |
| 1114 | |
Jiri Pirko | ccffad25 | 2009-05-22 23:22:17 +0000 | [diff] [blame] | 1115 | spinlock_t addr_list_lock; |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 1116 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
| 1117 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ |
Joe Perches | 2d348d1 | 2011-07-25 16:17:35 -0700 | [diff] [blame] | 1118 | bool uc_promisc; |
Wang Chen | 9d45abe | 2008-06-17 21:12:48 -0700 | [diff] [blame] | 1119 | unsigned int promiscuity; |
| 1120 | unsigned int allmulti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | |
| 1123 | /* Protocol specific pointers */ |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 1124 | |
Ben Hutchings | d11ead7 | 2011-11-25 14:40:26 +0000 | [diff] [blame] | 1125 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
Jiri Pirko | 5b9ea6e | 2011-12-08 04:11:18 +0000 | [diff] [blame] | 1126 | struct vlan_info __rcu *vlan_info; /* VLAN info */ |
Jesse Gross | 65ac6a5 | 2010-10-20 13:56:05 +0000 | [diff] [blame] | 1127 | #endif |
Ben Hutchings | 34a430d | 2011-11-25 14:38:38 +0000 | [diff] [blame] | 1128 | #if IS_ENABLED(CONFIG_NET_DSA) |
Ben Hutchings | cf50dcc | 2011-11-25 14:32:52 +0000 | [diff] [blame] | 1129 | struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
Lennert Buytenhek | 91da11f | 2008-10-07 13:44:02 +0000 | [diff] [blame] | 1130 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | void *atalk_ptr; /* AppleTalk link */ |
Eric Dumazet | 95ae6b2 | 2010-09-15 04:04:31 +0000 | [diff] [blame] | 1132 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
Eric Dumazet | fc766e4c | 2010-10-29 03:09:24 +0000 | [diff] [blame] | 1133 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
Eric Dumazet | 198caec | 2010-10-24 21:32:05 +0000 | [diff] [blame] | 1134 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | void *ec_ptr; /* Econet specific data */ |
| 1136 | void *ax25_ptr; /* AX.25 specific data */ |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 1137 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
| 1138 | assign before registering */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1140 | /* |
Eric Dumazet | cd13539 | 2010-09-16 02:58:13 +0000 | [diff] [blame] | 1141 | * Cache lines mostly used on receive path (including eth_type_trans()) |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1142 | */ |
Eric Dumazet | 4dc8913 | 2010-08-31 07:40:16 +0000 | [diff] [blame] | 1143 | unsigned long last_rx; /* Time of last Rx |
| 1144 | * This should not be set in |
| 1145 | * drivers, unless really needed, |
| 1146 | * because network stack (bonding) |
| 1147 | * use it if/when necessary, to |
| 1148 | * avoid dirtying this cache line. |
| 1149 | */ |
| 1150 | |
Eric Dumazet | cd13539 | 2010-09-16 02:58:13 +0000 | [diff] [blame] | 1151 | struct net_device *master; /* Pointer to master device of a group, |
| 1152 | * which this device is member of. |
| 1153 | */ |
| 1154 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1155 | /* Interface address info used in eth_type_trans() */ |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 1156 | unsigned char *dev_addr; /* hw address, (before bcast |
| 1157 | because most packets are |
| 1158 | unicast) */ |
| 1159 | |
Jiri Pirko | 31278e7 | 2009-06-17 01:12:19 +0000 | [diff] [blame] | 1160 | struct netdev_hw_addr_list dev_addrs; /* list of device |
| 1161 | hw addresses */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1163 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
| 1164 | |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1165 | #ifdef CONFIG_SYSFS |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1166 | struct kset *queues_kset; |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1167 | #endif |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1168 | |
david decotigny | ccf5ff6 | 2011-11-16 12:15:10 +0000 | [diff] [blame] | 1169 | #ifdef CONFIG_RPS |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1170 | struct netdev_rx_queue *_rx; |
| 1171 | |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 1172 | /* Number of RX queues allocated at register_netdev() time */ |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1173 | unsigned int num_rx_queues; |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 1174 | |
| 1175 | /* Number of RX queues currently active in device */ |
| 1176 | unsigned int real_num_rx_queues; |
Ben Hutchings | c445477 | 2011-01-19 11:03:53 +0000 | [diff] [blame] | 1177 | |
| 1178 | #ifdef CONFIG_RFS_ACCEL |
| 1179 | /* CPU reverse-mapping for RX completion interrupts, indexed |
| 1180 | * by RX queue number. Assigned by driver. This must only be |
| 1181 | * set if the ndo_rx_flow_steer operation is defined. */ |
| 1182 | struct cpu_rmap *rx_cpu_rmap; |
| 1183 | #endif |
Eric Dumazet | df33454 | 2010-03-24 19:13:54 +0000 | [diff] [blame] | 1184 | #endif |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1185 | |
stephen hemminger | 61391cd | 2010-11-15 06:38:12 +0000 | [diff] [blame] | 1186 | rx_handler_func_t __rcu *rx_handler; |
| 1187 | void __rcu *rx_handler_data; |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1188 | |
Eric Dumazet | 24824a0 | 2010-10-02 06:11:55 +0000 | [diff] [blame] | 1189 | struct netdev_queue __rcu *ingress_queue; |
Eric Dumazet | cd13539 | 2010-09-16 02:58:13 +0000 | [diff] [blame] | 1190 | |
| 1191 | /* |
| 1192 | * Cache lines mostly used on transmit path |
| 1193 | */ |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1194 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 1195 | |
| 1196 | /* Number of TX queues allocated at alloc_netdev_mq() time */ |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1197 | unsigned int num_tx_queues; |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 1198 | |
| 1199 | /* Number of TX queues currently active in device */ |
| 1200 | unsigned int real_num_tx_queues; |
| 1201 | |
Patrick McHardy | af356af | 2009-09-04 06:41:18 +0000 | [diff] [blame] | 1202 | /* root qdisc from userspace point of view */ |
| 1203 | struct Qdisc *qdisc; |
| 1204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 1206 | spinlock_t tx_global_lock; |
Eric Dumazet | cd13539 | 2010-09-16 02:58:13 +0000 | [diff] [blame] | 1207 | |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1208 | #ifdef CONFIG_XPS |
Eric Dumazet | a417786 | 2010-11-28 21:43:02 +0000 | [diff] [blame] | 1209 | struct xps_dev_maps __rcu *xps_maps; |
Tom Herbert | bf26414 | 2010-11-26 08:36:09 +0000 | [diff] [blame] | 1210 | #endif |
Tom Herbert | 1d24eb4 | 2010-11-21 13:17:27 +0000 | [diff] [blame] | 1211 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1212 | /* These may be needed for future network-power-down code. */ |
Eric Dumazet | 9d21493 | 2009-05-17 20:55:16 -0700 | [diff] [blame] | 1213 | |
| 1214 | /* |
| 1215 | * trans_start here is expensive for high speed devices on SMP, |
| 1216 | * please use netdev_queue->trans_start instead. |
| 1217 | */ |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1218 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
| 1219 | |
| 1220 | int watchdog_timeo; /* used by dev_watchdog() */ |
| 1221 | struct timer_list watchdog_timer; |
| 1222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | /* Number of references to this device */ |
Eric Dumazet | 29b4433 | 2010-10-11 10:22:12 +0000 | [diff] [blame] | 1224 | int __percpu *pcpu_refcnt; |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 1225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | /* delayed register/unregister */ |
| 1227 | struct list_head todo_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | /* device index hash chain */ |
| 1229 | struct hlist_node index_hlist; |
| 1230 | |
Eric Dumazet | e014deb | 2009-11-17 05:59:21 +0000 | [diff] [blame] | 1231 | struct list_head link_watch_list; |
Herbert Xu | 572a103 | 2007-05-08 18:34:17 -0700 | [diff] [blame] | 1232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | /* register/unregister state machine */ |
| 1234 | enum { NETREG_UNINITIALIZED=0, |
Stephen Hemminger | b17a7c1 | 2006-05-10 13:21:17 -0700 | [diff] [blame] | 1235 | NETREG_REGISTERED, /* completed register_netdevice */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
| 1237 | NETREG_UNREGISTERED, /* completed unregister todo */ |
| 1238 | NETREG_RELEASED, /* called free_netdev */ |
Benjamin Herrenschmidt | 937f1ba | 2009-01-14 21:05:05 -0800 | [diff] [blame] | 1239 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
Eric Dumazet | 449f454 | 2011-05-19 12:24:16 +0000 | [diff] [blame] | 1240 | } reg_state:8; |
| 1241 | |
| 1242 | bool dismantle; /* device is going do be freed */ |
Patrick McHardy | a283576 | 2010-02-26 06:34:51 +0000 | [diff] [blame] | 1243 | |
| 1244 | enum { |
| 1245 | RTNL_LINK_INITIALIZED, |
| 1246 | RTNL_LINK_INITIALIZING, |
| 1247 | } rtnl_link_state:16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 1249 | /* Called from unregister, can be used to call free_netdev */ |
| 1250 | void (*destructor)(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | #ifdef CONFIG_NETPOLL |
Jeff Moyer | 115c1d6 | 2005-06-22 22:05:31 -0700 | [diff] [blame] | 1253 | struct netpoll_info *npinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | #endif |
David S. Miller | eae792b | 2008-07-15 03:03:33 -0700 | [diff] [blame] | 1255 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1256 | #ifdef CONFIG_NET_NS |
Eric W. Biederman | 4a1c537 | 2007-09-12 11:56:32 +0200 | [diff] [blame] | 1257 | /* Network namespace this network device is inside */ |
| 1258 | struct net *nd_net; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1259 | #endif |
Eric W. Biederman | 4a1c537 | 2007-09-12 11:56:32 +0200 | [diff] [blame] | 1260 | |
David S. Miller | 4951704 | 2008-05-12 03:29:11 -0700 | [diff] [blame] | 1261 | /* mid-layer private */ |
Eric Dumazet | a7855c7 | 2010-09-23 23:51:51 +0000 | [diff] [blame] | 1262 | union { |
| 1263 | void *ml_priv; |
| 1264 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ |
Eric Dumazet | 290b895 | 2010-09-27 00:33:35 +0000 | [diff] [blame] | 1265 | struct pcpu_tstats __percpu *tstats; /* tunnel stats */ |
Eric Dumazet | 6d81f41 | 2010-09-27 20:50:33 +0000 | [diff] [blame] | 1266 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
Eric Dumazet | a7855c7 | 2010-09-23 23:51:51 +0000 | [diff] [blame] | 1267 | }; |
Patrick McHardy | eca9eba | 2008-07-05 21:26:13 -0700 | [diff] [blame] | 1268 | /* GARP */ |
Eric Dumazet | 3cc77ec | 2010-10-24 21:32:36 +0000 | [diff] [blame] | 1269 | struct garp_port __rcu *garp_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1271 | /* class/net/name entry */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1272 | struct device dev; |
Eric W. Biederman | 0c509a6 | 2009-10-29 14:18:21 +0000 | [diff] [blame] | 1273 | /* space for optional device, statistics, and wireless sysfs groups */ |
| 1274 | const struct attribute_group *sysfs_groups[4]; |
Patrick McHardy | 38f7b87 | 2007-06-13 12:03:51 -0700 | [diff] [blame] | 1275 | |
| 1276 | /* rtnetlink link ops */ |
| 1277 | const struct rtnl_link_ops *rtnl_link_ops; |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1278 | |
Peter P Waskiewicz Jr | 82cc1a7 | 2008-03-21 03:43:19 -0700 | [diff] [blame] | 1279 | /* for setting kernel sock attribute on TCP connection setup */ |
| 1280 | #define GSO_MAX_SIZE 65536 |
| 1281 | unsigned int gso_max_size; |
Stephen Hemminger | d314774 | 2008-11-19 21:32:24 -0800 | [diff] [blame] | 1282 | |
Jeff Kirsher | 7a6b6f5 | 2008-11-25 01:02:08 -0800 | [diff] [blame] | 1283 | #ifdef CONFIG_DCB |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 1284 | /* Data Center Bridging netlink ops */ |
Stephen Hemminger | 3295354 | 2009-10-05 06:01:03 +0000 | [diff] [blame] | 1285 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 1286 | #endif |
John Fastabend | 4f57c08 | 2011-01-17 08:06:04 +0000 | [diff] [blame] | 1287 | u8 num_tc; |
| 1288 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; |
| 1289 | u8 prio_tc_map[TC_BITMASK + 1]; |
Alexander Duyck | 2f90b86 | 2008-11-20 20:52:10 -0800 | [diff] [blame] | 1290 | |
Ben Hutchings | d11ead7 | 2011-11-25 14:40:26 +0000 | [diff] [blame] | 1291 | #if IS_ENABLED(CONFIG_FCOE) |
Yi Zou | 4d288d5 | 2009-02-27 14:06:59 -0800 | [diff] [blame] | 1292 | /* max exchange id for FCoE LRO by ddp */ |
| 1293 | unsigned int fcoe_ddp_xid; |
| 1294 | #endif |
Neil Horman | 5bc1421 | 2011-11-22 05:10:51 +0000 | [diff] [blame] | 1295 | #if IS_ENABLED(CONFIG_NETPRIO_CGROUP) |
| 1296 | struct netprio_map __rcu *priomap; |
| 1297 | #endif |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 1298 | /* phy device may attach itself for hardware timestamping */ |
| 1299 | struct phy_device *phydev; |
Vlad Dogaru | cbda10f | 2011-01-13 23:38:30 +0000 | [diff] [blame] | 1300 | |
| 1301 | /* group the device belongs to */ |
| 1302 | int group; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | }; |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1304 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | |
| 1306 | #define NETDEV_ALIGN 32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1308 | static inline |
John Fastabend | 4f57c08 | 2011-01-17 08:06:04 +0000 | [diff] [blame] | 1309 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) |
| 1310 | { |
| 1311 | return dev->prio_tc_map[prio & TC_BITMASK]; |
| 1312 | } |
| 1313 | |
| 1314 | static inline |
| 1315 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) |
| 1316 | { |
| 1317 | if (tc >= dev->num_tc) |
| 1318 | return -EINVAL; |
| 1319 | |
| 1320 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; |
| 1321 | return 0; |
| 1322 | } |
| 1323 | |
| 1324 | static inline |
| 1325 | void netdev_reset_tc(struct net_device *dev) |
| 1326 | { |
| 1327 | dev->num_tc = 0; |
| 1328 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); |
| 1329 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); |
| 1330 | } |
| 1331 | |
| 1332 | static inline |
| 1333 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) |
| 1334 | { |
| 1335 | if (tc >= dev->num_tc) |
| 1336 | return -EINVAL; |
| 1337 | |
| 1338 | dev->tc_to_txq[tc].count = count; |
| 1339 | dev->tc_to_txq[tc].offset = offset; |
| 1340 | return 0; |
| 1341 | } |
| 1342 | |
| 1343 | static inline |
| 1344 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) |
| 1345 | { |
| 1346 | if (num_tc > TC_MAX_QUEUE) |
| 1347 | return -EINVAL; |
| 1348 | |
| 1349 | dev->num_tc = num_tc; |
| 1350 | return 0; |
| 1351 | } |
| 1352 | |
| 1353 | static inline |
| 1354 | int netdev_get_num_tc(struct net_device *dev) |
| 1355 | { |
| 1356 | return dev->num_tc; |
| 1357 | } |
| 1358 | |
| 1359 | static inline |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1360 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, |
| 1361 | unsigned int index) |
| 1362 | { |
| 1363 | return &dev->_tx[index]; |
| 1364 | } |
| 1365 | |
| 1366 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
| 1367 | void (*f)(struct net_device *, |
| 1368 | struct netdev_queue *, |
| 1369 | void *), |
| 1370 | void *arg) |
| 1371 | { |
| 1372 | unsigned int i; |
| 1373 | |
| 1374 | for (i = 0; i < dev->num_tx_queues; i++) |
| 1375 | f(dev, &dev->_tx[i], arg); |
| 1376 | } |
| 1377 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1378 | /* |
| 1379 | * Net namespace inlines |
| 1380 | */ |
| 1381 | static inline |
| 1382 | struct net *dev_net(const struct net_device *dev) |
| 1383 | { |
Eric Dumazet | c2d9ba9 | 2010-06-01 06:51:19 +0000 | [diff] [blame] | 1384 | return read_pnet(&dev->nd_net); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1385 | } |
| 1386 | |
| 1387 | static inline |
Denis V. Lunev | f5aa23f | 2008-03-26 00:48:17 -0700 | [diff] [blame] | 1388 | void dev_net_set(struct net_device *dev, struct net *net) |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1389 | { |
| 1390 | #ifdef CONFIG_NET_NS |
Denis V. Lunev | f3005d7 | 2008-04-16 02:02:18 -0700 | [diff] [blame] | 1391 | release_net(dev->nd_net); |
| 1392 | dev->nd_net = hold_net(net); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1393 | #endif |
| 1394 | } |
| 1395 | |
Lennert Buytenhek | cf85d08 | 2008-10-07 13:45:02 +0000 | [diff] [blame] | 1396 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
| 1397 | { |
| 1398 | #ifdef CONFIG_NET_DSA_TAG_DSA |
| 1399 | if (dev->dsa_ptr != NULL) |
| 1400 | return dsa_uses_dsa_tags(dev->dsa_ptr); |
| 1401 | #endif |
| 1402 | |
| 1403 | return 0; |
| 1404 | } |
| 1405 | |
Arnd Bergmann | 8a83a00 | 2010-01-30 12:23:03 +0000 | [diff] [blame] | 1406 | #ifndef CONFIG_NET_NS |
| 1407 | static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) |
| 1408 | { |
| 1409 | skb->dev = dev; |
| 1410 | } |
| 1411 | #else /* CONFIG_NET_NS */ |
| 1412 | void skb_set_dev(struct sk_buff *skb, struct net_device *dev); |
| 1413 | #endif |
| 1414 | |
Lennert Buytenhek | 396138f0 | 2008-10-07 13:46:07 +0000 | [diff] [blame] | 1415 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
| 1416 | { |
| 1417 | #ifdef CONFIG_NET_DSA_TAG_TRAILER |
| 1418 | if (dev->dsa_ptr != NULL) |
| 1419 | return dsa_uses_trailer_tags(dev->dsa_ptr); |
| 1420 | #endif |
| 1421 | |
| 1422 | return 0; |
| 1423 | } |
| 1424 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1425 | /** |
| 1426 | * netdev_priv - access network device private data |
| 1427 | * @dev: network device |
| 1428 | * |
| 1429 | * Get network device private data |
| 1430 | */ |
Patrick McHardy | 6472ce6 | 2007-06-13 12:03:21 -0700 | [diff] [blame] | 1431 | static inline void *netdev_priv(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | { |
Eric Dumazet | 1ce8e7b | 2009-05-27 04:42:37 +0000 | [diff] [blame] | 1433 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | } |
| 1435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | /* Set the sysfs physical device reference for the network logical device |
| 1437 | * if set prior to registration will cause a symlink during initialization. |
| 1438 | */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 1439 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Marcel Holtmann | 384912e | 2009-08-31 21:08:19 +0000 | [diff] [blame] | 1441 | /* Set the sysfs device type for the network logical device to allow |
| 1442 | * fin grained indentification of different network device types. For |
| 1443 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. |
| 1444 | */ |
| 1445 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) |
| 1446 | |
Stephen Hemminger | 3b582cc | 2007-11-01 02:21:47 -0700 | [diff] [blame] | 1447 | /** |
| 1448 | * netif_napi_add - initialize a napi context |
| 1449 | * @dev: network device |
| 1450 | * @napi: napi context |
| 1451 | * @poll: polling function |
| 1452 | * @weight: default weight |
| 1453 | * |
| 1454 | * netif_napi_add() must be used to initialize a napi context prior to calling |
| 1455 | * *any* of the other napi related functions. |
| 1456 | */ |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 1457 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
| 1458 | int (*poll)(struct napi_struct *, int), int weight); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1459 | |
Alexander Duyck | d815653 | 2008-07-08 15:13:05 -0700 | [diff] [blame] | 1460 | /** |
| 1461 | * netif_napi_del - remove a napi context |
| 1462 | * @napi: napi context |
| 1463 | * |
| 1464 | * netif_napi_del() removes a napi context from the network device napi list |
| 1465 | */ |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 1466 | void netif_napi_del(struct napi_struct *napi); |
| 1467 | |
| 1468 | struct napi_gro_cb { |
Herbert Xu | 78a478d | 2009-05-26 18:50:21 +0000 | [diff] [blame] | 1469 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
| 1470 | void *frag0; |
| 1471 | |
Herbert Xu | 7489594 | 2009-05-26 18:50:27 +0000 | [diff] [blame] | 1472 | /* Length of frag0. */ |
| 1473 | unsigned int frag0_len; |
| 1474 | |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1475 | /* This indicates where we are processing relative to skb->data. */ |
| 1476 | int data_offset; |
| 1477 | |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 1478 | /* This is non-zero if the packet may be of the same flow. */ |
| 1479 | int same_flow; |
| 1480 | |
| 1481 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
| 1482 | int flush; |
| 1483 | |
| 1484 | /* Number of segments aggregated. */ |
| 1485 | int count; |
Herbert Xu | 5d38a07 | 2009-01-04 16:13:40 -0800 | [diff] [blame] | 1486 | |
| 1487 | /* Free the skb? */ |
| 1488 | int free; |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 1489 | }; |
| 1490 | |
| 1491 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) |
Alexander Duyck | d815653 | 2008-07-08 15:13:05 -0700 | [diff] [blame] | 1492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | struct packet_type { |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 1494 | __be16 type; /* This is really htons(ether_type). */ |
| 1495 | struct net_device *dev; /* NULL is wildcarded here */ |
| 1496 | int (*func) (struct sk_buff *, |
| 1497 | struct net_device *, |
| 1498 | struct packet_type *, |
| 1499 | struct net_device *); |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 1500 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 1501 | netdev_features_t features); |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1502 | int (*gso_send_check)(struct sk_buff *skb); |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 1503 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
| 1504 | struct sk_buff *skb); |
| 1505 | int (*gro_complete)(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | void *af_packet_priv; |
| 1507 | struct list_head list; |
| 1508 | }; |
| 1509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | #include <linux/notifier.h> |
| 1511 | |
Amerigo Wang | dcfe142 | 2011-07-25 17:13:09 -0700 | [diff] [blame] | 1512 | /* netdevice notifier chain. Please remember to update the rtnetlink |
| 1513 | * notification exclusion list in rtnetlink_event() when adding new |
| 1514 | * types. |
| 1515 | */ |
| 1516 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ |
| 1517 | #define NETDEV_DOWN 0x0002 |
| 1518 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface |
| 1519 | detected a hardware crash and restarted |
| 1520 | - we can use this eg to kick tcp sessions |
| 1521 | once done */ |
| 1522 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ |
| 1523 | #define NETDEV_REGISTER 0x0005 |
| 1524 | #define NETDEV_UNREGISTER 0x0006 |
| 1525 | #define NETDEV_CHANGEMTU 0x0007 |
| 1526 | #define NETDEV_CHANGEADDR 0x0008 |
| 1527 | #define NETDEV_GOING_DOWN 0x0009 |
| 1528 | #define NETDEV_CHANGENAME 0x000A |
| 1529 | #define NETDEV_FEAT_CHANGE 0x000B |
| 1530 | #define NETDEV_BONDING_FAILOVER 0x000C |
| 1531 | #define NETDEV_PRE_UP 0x000D |
| 1532 | #define NETDEV_PRE_TYPE_CHANGE 0x000E |
| 1533 | #define NETDEV_POST_TYPE_CHANGE 0x000F |
| 1534 | #define NETDEV_POST_INIT 0x0010 |
| 1535 | #define NETDEV_UNREGISTER_BATCH 0x0011 |
| 1536 | #define NETDEV_RELEASE 0x0012 |
| 1537 | #define NETDEV_NOTIFY_PEERS 0x0013 |
| 1538 | #define NETDEV_JOIN 0x0014 |
| 1539 | |
| 1540 | extern int register_netdevice_notifier(struct notifier_block *nb); |
| 1541 | extern int unregister_netdevice_notifier(struct notifier_block *nb); |
| 1542 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
| 1543 | |
| 1544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | extern rwlock_t dev_base_lock; /* Device list lock */ |
| 1546 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1547 | |
| 1548 | #define for_each_netdev(net, d) \ |
| 1549 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) |
Eric W. Biederman | dcbccbd4 | 2009-11-29 22:25:26 +0000 | [diff] [blame] | 1550 | #define for_each_netdev_reverse(net, d) \ |
| 1551 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) |
Eric Dumazet | c6d14c8 | 2009-11-04 05:43:23 -0800 | [diff] [blame] | 1552 | #define for_each_netdev_rcu(net, d) \ |
| 1553 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1554 | #define for_each_netdev_safe(net, d, n) \ |
| 1555 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) |
| 1556 | #define for_each_netdev_continue(net, d) \ |
| 1557 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) |
stephen hemminger | 254245d | 2009-11-10 07:54:47 +0000 | [diff] [blame] | 1558 | #define for_each_netdev_continue_rcu(net, d) \ |
| 1559 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1560 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
| 1561 | |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 1562 | static inline struct net_device *next_net_device(struct net_device *dev) |
| 1563 | { |
| 1564 | struct list_head *lh; |
| 1565 | struct net *net; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1566 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 1567 | net = dev_net(dev); |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 1568 | lh = dev->dev_list.next; |
| 1569 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
| 1570 | } |
| 1571 | |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 1572 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
| 1573 | { |
| 1574 | struct list_head *lh; |
| 1575 | struct net *net; |
| 1576 | |
| 1577 | net = dev_net(dev); |
Eric Dumazet | ccf4343 | 2011-01-26 18:08:02 +0000 | [diff] [blame] | 1578 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
Eric Dumazet | ce81b76 | 2009-11-11 17:34:30 +0000 | [diff] [blame] | 1579 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
| 1580 | } |
| 1581 | |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 1582 | static inline struct net_device *first_net_device(struct net *net) |
| 1583 | { |
| 1584 | return list_empty(&net->dev_base_head) ? NULL : |
| 1585 | net_device_entry(net->dev_base_head.next); |
| 1586 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 1587 | |
Eric Dumazet | ccf4343 | 2011-01-26 18:08:02 +0000 | [diff] [blame] | 1588 | static inline struct net_device *first_net_device_rcu(struct net *net) |
| 1589 | { |
| 1590 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); |
| 1591 | |
| 1592 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
| 1593 | } |
| 1594 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | extern int netdev_boot_setup_check(struct net_device *dev); |
| 1596 | extern unsigned long netdev_boot_base(const char *prefix, int unit); |
Eric Dumazet | 941666c | 2010-12-05 01:23:53 +0000 | [diff] [blame] | 1597 | extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, |
| 1598 | const char *hwaddr); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1599 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
| 1600 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | extern void dev_add_pack(struct packet_type *pt); |
| 1602 | extern void dev_remove_pack(struct packet_type *pt); |
| 1603 | extern void __dev_remove_pack(struct packet_type *pt); |
| 1604 | |
Eric Dumazet | bb69ae0 | 2010-06-07 11:42:13 +0000 | [diff] [blame] | 1605 | extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
| 1606 | unsigned short mask); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1607 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
Eric Dumazet | 72c9528 | 2009-10-30 07:11:27 +0000 | [diff] [blame] | 1608 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1609 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
| 1611 | extern int dev_open(struct net_device *dev); |
| 1612 | extern int dev_close(struct net_device *dev); |
Ben Hutchings | 0187bdf | 2008-06-19 16:15:47 -0700 | [diff] [blame] | 1613 | extern void dev_disable_lro(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | extern int dev_queue_xmit(struct sk_buff *skb); |
| 1615 | extern int register_netdevice(struct net_device *dev); |
Eric Dumazet | 44a0873 | 2009-10-27 07:03:04 +0000 | [diff] [blame] | 1616 | extern void unregister_netdevice_queue(struct net_device *dev, |
| 1617 | struct list_head *head); |
Eric Dumazet | 9b5e383 | 2009-10-27 07:04:19 +0000 | [diff] [blame] | 1618 | extern void unregister_netdevice_many(struct list_head *head); |
Eric Dumazet | 44a0873 | 2009-10-27 07:03:04 +0000 | [diff] [blame] | 1619 | static inline void unregister_netdevice(struct net_device *dev) |
| 1620 | { |
| 1621 | unregister_netdevice_queue(dev, NULL); |
| 1622 | } |
| 1623 | |
Eric Dumazet | 29b4433 | 2010-10-11 10:22:12 +0000 | [diff] [blame] | 1624 | extern int netdev_refcnt_read(const struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | extern void free_netdev(struct net_device *dev); |
| 1626 | extern void synchronize_net(void); |
Benjamin Herrenschmidt | 937f1ba | 2009-01-14 21:05:05 -0800 | [diff] [blame] | 1627 | extern int init_dummy_netdev(struct net_device *dev); |
David S. Miller | 9d40bbd | 2009-03-04 23:46:25 -0800 | [diff] [blame] | 1628 | extern void netdev_resync_ops(struct net_device *dev); |
Benjamin Herrenschmidt | 937f1ba | 2009-01-14 21:05:05 -0800 | [diff] [blame] | 1629 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1630 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
| 1631 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); |
Eric Dumazet | fb699dfd | 2009-10-19 19:18:49 +0000 | [diff] [blame] | 1632 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | extern int dev_restart(struct net_device *dev); |
| 1634 | #ifdef CONFIG_NETPOLL_TRAP |
| 1635 | extern int netpoll_trap(void); |
| 1636 | #endif |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1637 | extern int skb_gro_receive(struct sk_buff **head, |
| 1638 | struct sk_buff *skb); |
Herbert Xu | 78a478d | 2009-05-26 18:50:21 +0000 | [diff] [blame] | 1639 | extern void skb_gro_reset_offset(struct sk_buff *skb); |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1640 | |
| 1641 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) |
| 1642 | { |
| 1643 | return NAPI_GRO_CB(skb)->data_offset; |
| 1644 | } |
| 1645 | |
| 1646 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) |
| 1647 | { |
| 1648 | return skb->len - NAPI_GRO_CB(skb)->data_offset; |
| 1649 | } |
| 1650 | |
| 1651 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) |
| 1652 | { |
| 1653 | NAPI_GRO_CB(skb)->data_offset += len; |
| 1654 | } |
| 1655 | |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1656 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
| 1657 | unsigned int offset) |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1658 | { |
Herbert Xu | 78a478d | 2009-05-26 18:50:21 +0000 | [diff] [blame] | 1659 | return NAPI_GRO_CB(skb)->frag0 + offset; |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1660 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1662 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
| 1663 | { |
| 1664 | return NAPI_GRO_CB(skb)->frag0_len < hlen; |
| 1665 | } |
| 1666 | |
| 1667 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
| 1668 | unsigned int offset) |
| 1669 | { |
Herbert Xu | 17dd759 | 2011-07-27 06:16:28 -0700 | [diff] [blame] | 1670 | if (!pskb_may_pull(skb, hlen)) |
| 1671 | return NULL; |
| 1672 | |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1673 | NAPI_GRO_CB(skb)->frag0 = NULL; |
| 1674 | NAPI_GRO_CB(skb)->frag0_len = 0; |
Herbert Xu | 17dd759 | 2011-07-27 06:16:28 -0700 | [diff] [blame] | 1675 | return skb->data + offset; |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1676 | } |
| 1677 | |
Herbert Xu | aa4b9f5 | 2009-02-08 18:00:37 +0000 | [diff] [blame] | 1678 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
| 1679 | { |
Herbert Xu | 78d3fd0 | 2009-05-26 18:50:23 +0000 | [diff] [blame] | 1680 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
Herbert Xu | aa4b9f5 | 2009-02-08 18:00:37 +0000 | [diff] [blame] | 1681 | } |
| 1682 | |
Herbert Xu | 36e7b1b | 2009-04-27 05:44:45 -0700 | [diff] [blame] | 1683 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
| 1684 | { |
Herbert Xu | 78d3fd0 | 2009-05-26 18:50:23 +0000 | [diff] [blame] | 1685 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
| 1686 | skb_network_offset(skb); |
Herbert Xu | 36e7b1b | 2009-04-27 05:44:45 -0700 | [diff] [blame] | 1687 | } |
| 1688 | |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 1689 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
| 1690 | unsigned short type, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 1691 | const void *daddr, const void *saddr, |
| 1692 | unsigned len) |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 1693 | { |
Ursula Braun | f1ecfd5 | 2007-10-22 16:16:14 +0200 | [diff] [blame] | 1694 | if (!dev->header_ops || !dev->header_ops->create) |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 1695 | return 0; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 1696 | |
| 1697 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 1698 | } |
| 1699 | |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 1700 | static inline int dev_parse_header(const struct sk_buff *skb, |
| 1701 | unsigned char *haddr) |
| 1702 | { |
| 1703 | const struct net_device *dev = skb->dev; |
| 1704 | |
Patrick McHardy | 1b83336 | 2007-10-18 05:09:28 -0700 | [diff] [blame] | 1705 | if (!dev->header_ops || !dev->header_ops->parse) |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 1706 | return 0; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 1707 | return dev->header_ops->parse(skb, haddr); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 1708 | } |
| 1709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
| 1711 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); |
| 1712 | static inline int unregister_gifconf(unsigned int family) |
| 1713 | { |
| 1714 | return register_gifconf(family, NULL); |
| 1715 | } |
| 1716 | |
| 1717 | /* |
Eric Dumazet | 8875127 | 2010-04-19 05:07:33 +0000 | [diff] [blame] | 1718 | * Incoming packets are placed on per-cpu queues |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | */ |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 1720 | struct softnet_data { |
David S. Miller | 37437bb | 2008-07-16 02:15:04 -0700 | [diff] [blame] | 1721 | struct Qdisc *output_queue; |
Changli Gao | a9cbd58 | 2010-04-26 23:06:24 +0000 | [diff] [blame] | 1722 | struct Qdisc **output_queue_tailp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | struct list_head poll_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | struct sk_buff *completion_queue; |
Changli Gao | 6e7676c | 2010-04-27 15:07:33 -0700 | [diff] [blame] | 1725 | struct sk_buff_head process_queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | |
Changli Gao | dee4287 | 2010-05-02 05:42:16 +0000 | [diff] [blame] | 1727 | /* stats */ |
David S. Miller | cd7b539 | 2010-05-02 22:27:59 -0700 | [diff] [blame] | 1728 | unsigned int processed; |
| 1729 | unsigned int time_squeeze; |
| 1730 | unsigned int cpu_collision; |
| 1731 | unsigned int received_rps; |
Changli Gao | dee4287 | 2010-05-02 05:42:16 +0000 | [diff] [blame] | 1732 | |
Changli Gao | fd793d8 | 2010-04-15 00:16:59 -0700 | [diff] [blame] | 1733 | #ifdef CONFIG_RPS |
Eric Dumazet | 8875127 | 2010-04-19 05:07:33 +0000 | [diff] [blame] | 1734 | struct softnet_data *rps_ipi_list; |
| 1735 | |
| 1736 | /* Elements below can be accessed between CPUs for RPS */ |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1737 | struct call_single_data csd ____cacheline_aligned_in_smp; |
Eric Dumazet | 8875127 | 2010-04-19 05:07:33 +0000 | [diff] [blame] | 1738 | struct softnet_data *rps_ipi_next; |
| 1739 | unsigned int cpu; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 1740 | unsigned int input_queue_head; |
Tom Herbert | 76cc8b1 | 2010-05-20 18:37:59 +0000 | [diff] [blame] | 1741 | unsigned int input_queue_tail; |
Tom Herbert | 1e94d72 | 2010-03-18 17:45:44 -0700 | [diff] [blame] | 1742 | #endif |
Changli Gao | dee4287 | 2010-05-02 05:42:16 +0000 | [diff] [blame] | 1743 | unsigned dropped; |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1744 | struct sk_buff_head input_pkt_queue; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1745 | struct napi_struct backlog; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | }; |
| 1747 | |
Tom Herbert | 76cc8b1 | 2010-05-20 18:37:59 +0000 | [diff] [blame] | 1748 | static inline void input_queue_head_incr(struct softnet_data *sd) |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 1749 | { |
| 1750 | #ifdef CONFIG_RPS |
Tom Herbert | 76cc8b1 | 2010-05-20 18:37:59 +0000 | [diff] [blame] | 1751 | sd->input_queue_head++; |
| 1752 | #endif |
| 1753 | } |
| 1754 | |
| 1755 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, |
| 1756 | unsigned int *qtail) |
| 1757 | { |
| 1758 | #ifdef CONFIG_RPS |
| 1759 | *qtail = ++sd->input_queue_tail; |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 1760 | #endif |
| 1761 | } |
| 1762 | |
Tom Herbert | 0a9627f | 2010-03-16 08:03:29 +0000 | [diff] [blame] | 1763 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | |
David S. Miller | 37437bb | 2008-07-16 02:15:04 -0700 | [diff] [blame] | 1765 | extern void __netif_schedule(struct Qdisc *q); |
David S. Miller | 86d804e | 2008-07-08 23:11:25 -0700 | [diff] [blame] | 1766 | |
| 1767 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
| 1768 | { |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 1769 | if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
David S. Miller | 37437bb | 2008-07-16 02:15:04 -0700 | [diff] [blame] | 1770 | __netif_schedule(txq->qdisc); |
David S. Miller | 86d804e | 2008-07-08 23:11:25 -0700 | [diff] [blame] | 1771 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 1773 | static inline void netif_tx_schedule_all(struct net_device *dev) |
| 1774 | { |
| 1775 | unsigned int i; |
| 1776 | |
| 1777 | for (i = 0; i < dev->num_tx_queues; i++) |
| 1778 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); |
| 1779 | } |
| 1780 | |
Dave Jones | d29f749 | 2008-07-22 14:09:06 -0700 | [diff] [blame] | 1781 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
| 1782 | { |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 1783 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
Dave Jones | d29f749 | 2008-07-22 14:09:06 -0700 | [diff] [blame] | 1784 | } |
| 1785 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1786 | /** |
| 1787 | * netif_start_queue - allow transmit |
| 1788 | * @dev: network device |
| 1789 | * |
| 1790 | * Allow upper layers to call the device hard_start_xmit routine. |
| 1791 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | static inline void netif_start_queue(struct net_device *dev) |
| 1793 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1794 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | } |
| 1796 | |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 1797 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
| 1798 | { |
| 1799 | unsigned int i; |
| 1800 | |
| 1801 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 1802 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 1803 | netif_tx_start_queue(txq); |
| 1804 | } |
| 1805 | } |
| 1806 | |
David S. Miller | 79d1638 | 2008-07-08 23:14:46 -0700 | [diff] [blame] | 1807 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | { |
| 1809 | #ifdef CONFIG_NETPOLL_TRAP |
Sergei Shtylyov | 5f286e1 | 2007-04-28 20:57:37 -0700 | [diff] [blame] | 1810 | if (netpoll_trap()) { |
Krishna Kumar | 7b3d3e4 | 2009-08-29 20:21:21 +0000 | [diff] [blame] | 1811 | netif_tx_start_queue(dev_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | return; |
Sergei Shtylyov | 5f286e1 | 2007-04-28 20:57:37 -0700 | [diff] [blame] | 1813 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | #endif |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 1815 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
David S. Miller | 37437bb | 2008-07-16 02:15:04 -0700 | [diff] [blame] | 1816 | __netif_schedule(dev_queue->qdisc); |
David S. Miller | 79d1638 | 2008-07-08 23:14:46 -0700 | [diff] [blame] | 1817 | } |
| 1818 | |
Dave Jones | d29f749 | 2008-07-22 14:09:06 -0700 | [diff] [blame] | 1819 | /** |
| 1820 | * netif_wake_queue - restart transmit |
| 1821 | * @dev: network device |
| 1822 | * |
| 1823 | * Allow upper layers to call the device hard_start_xmit routine. |
| 1824 | * Used for flow control when transmit resources are available. |
| 1825 | */ |
David S. Miller | 79d1638 | 2008-07-08 23:14:46 -0700 | [diff] [blame] | 1826 | static inline void netif_wake_queue(struct net_device *dev) |
| 1827 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1828 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | } |
| 1830 | |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 1831 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
| 1832 | { |
| 1833 | unsigned int i; |
| 1834 | |
| 1835 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 1836 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 1837 | netif_tx_wake_queue(txq); |
| 1838 | } |
| 1839 | } |
| 1840 | |
Dave Jones | d29f749 | 2008-07-22 14:09:06 -0700 | [diff] [blame] | 1841 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
| 1842 | { |
Guillaume Chazarain | 18543a6 | 2010-11-06 06:39:32 +0000 | [diff] [blame] | 1843 | if (WARN_ON(!dev_queue)) { |
Joe Perches | 256ee43 | 2011-03-01 07:06:12 +0000 | [diff] [blame] | 1844 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
Guillaume Chazarain | 18543a6 | 2010-11-06 06:39:32 +0000 | [diff] [blame] | 1845 | return; |
| 1846 | } |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 1847 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
Dave Jones | d29f749 | 2008-07-22 14:09:06 -0700 | [diff] [blame] | 1848 | } |
| 1849 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1850 | /** |
| 1851 | * netif_stop_queue - stop transmitted packets |
| 1852 | * @dev: network device |
| 1853 | * |
| 1854 | * Stop upper layers calling the device hard_start_xmit routine. |
| 1855 | * Used for flow control when transmit resources are unavailable. |
| 1856 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | static inline void netif_stop_queue(struct net_device *dev) |
| 1858 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1859 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | } |
| 1861 | |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 1862 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
| 1863 | { |
| 1864 | unsigned int i; |
| 1865 | |
| 1866 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 1867 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 1868 | netif_tx_stop_queue(txq); |
| 1869 | } |
| 1870 | } |
| 1871 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 1872 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
Dave Jones | d29f749 | 2008-07-22 14:09:06 -0700 | [diff] [blame] | 1873 | { |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 1874 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
Dave Jones | d29f749 | 2008-07-22 14:09:06 -0700 | [diff] [blame] | 1875 | } |
| 1876 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1877 | /** |
| 1878 | * netif_queue_stopped - test if transmit queue is flowblocked |
| 1879 | * @dev: network device |
| 1880 | * |
| 1881 | * Test if transmit queue on device is currently unable to send. |
| 1882 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 1883 | static inline bool netif_queue_stopped(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 1885 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | } |
| 1887 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 1888 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 1889 | { |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 1890 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
| 1891 | } |
| 1892 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 1893 | static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 1894 | { |
| 1895 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; |
| 1896 | } |
| 1897 | |
Tom Herbert | c5d67bd | 2011-11-28 16:32:52 +0000 | [diff] [blame] | 1898 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
| 1899 | unsigned int bytes) |
| 1900 | { |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1901 | #ifdef CONFIG_BQL |
| 1902 | dql_queued(&dev_queue->dql, bytes); |
Alexander Duyck | b37c0fb | 2012-02-07 02:29:06 +0000 | [diff] [blame] | 1903 | |
| 1904 | if (likely(dql_avail(&dev_queue->dql) >= 0)) |
| 1905 | return; |
| 1906 | |
| 1907 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
| 1908 | |
| 1909 | /* |
| 1910 | * The XOFF flag must be set before checking the dql_avail below, |
| 1911 | * because in netdev_tx_completed_queue we update the dql_completed |
| 1912 | * before checking the XOFF flag. |
| 1913 | */ |
| 1914 | smp_mb(); |
| 1915 | |
| 1916 | /* check again in case another CPU has just made room avail */ |
| 1917 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) |
| 1918 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1919 | #endif |
Tom Herbert | c5d67bd | 2011-11-28 16:32:52 +0000 | [diff] [blame] | 1920 | } |
| 1921 | |
| 1922 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
| 1923 | { |
| 1924 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); |
| 1925 | } |
| 1926 | |
| 1927 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, |
| 1928 | unsigned pkts, unsigned bytes) |
| 1929 | { |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1930 | #ifdef CONFIG_BQL |
Alexander Duyck | b37c0fb | 2012-02-07 02:29:06 +0000 | [diff] [blame] | 1931 | if (unlikely(!bytes)) |
| 1932 | return; |
| 1933 | |
| 1934 | dql_completed(&dev_queue->dql, bytes); |
| 1935 | |
| 1936 | /* |
| 1937 | * Without the memory barrier there is a small possiblity that |
| 1938 | * netdev_tx_sent_queue will miss the update and cause the queue to |
| 1939 | * be stopped forever |
| 1940 | */ |
| 1941 | smp_mb(); |
| 1942 | |
| 1943 | if (dql_avail(&dev_queue->dql) < 0) |
| 1944 | return; |
| 1945 | |
| 1946 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) |
| 1947 | netif_schedule_queue(dev_queue); |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1948 | #endif |
Tom Herbert | c5d67bd | 2011-11-28 16:32:52 +0000 | [diff] [blame] | 1949 | } |
| 1950 | |
| 1951 | static inline void netdev_completed_queue(struct net_device *dev, |
| 1952 | unsigned pkts, unsigned bytes) |
| 1953 | { |
| 1954 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); |
| 1955 | } |
| 1956 | |
| 1957 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) |
| 1958 | { |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1959 | #ifdef CONFIG_BQL |
Alexander Duyck | 5c49035 | 2012-02-07 02:29:01 +0000 | [diff] [blame] | 1960 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
Tom Herbert | 114cf58 | 2011-11-28 16:33:09 +0000 | [diff] [blame] | 1961 | dql_reset(&q->dql); |
| 1962 | #endif |
Tom Herbert | c5d67bd | 2011-11-28 16:32:52 +0000 | [diff] [blame] | 1963 | } |
| 1964 | |
| 1965 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
| 1966 | { |
| 1967 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 1968 | } |
| 1969 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1970 | /** |
| 1971 | * netif_running - test if up |
| 1972 | * @dev: network device |
| 1973 | * |
| 1974 | * Test if the device has been brought up. |
| 1975 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 1976 | static inline bool netif_running(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | { |
| 1978 | return test_bit(__LINK_STATE_START, &dev->state); |
| 1979 | } |
| 1980 | |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1981 | /* |
| 1982 | * Routines to manage the subqueues on a device. We only need start |
| 1983 | * stop, and a check if it's stopped. All other device management is |
| 1984 | * done at the overall netdevice level. |
| 1985 | * Also test the device if we're multiqueue. |
| 1986 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1987 | |
| 1988 | /** |
| 1989 | * netif_start_subqueue - allow sending packets on subqueue |
| 1990 | * @dev: network device |
| 1991 | * @queue_index: sub queue index |
| 1992 | * |
| 1993 | * Start individual transmit queue of a device with multiple transmit queues. |
| 1994 | */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1995 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
| 1996 | { |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 1997 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
Krishna Kumar | 7b3d3e4 | 2009-08-29 20:21:21 +0000 | [diff] [blame] | 1998 | |
| 1999 | netif_tx_start_queue(txq); |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2000 | } |
| 2001 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2002 | /** |
| 2003 | * netif_stop_subqueue - stop sending packets on subqueue |
| 2004 | * @dev: network device |
| 2005 | * @queue_index: sub queue index |
| 2006 | * |
| 2007 | * Stop individual transmit queue of a device with multiple transmit queues. |
| 2008 | */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2009 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
| 2010 | { |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2011 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2012 | #ifdef CONFIG_NETPOLL_TRAP |
| 2013 | if (netpoll_trap()) |
| 2014 | return; |
| 2015 | #endif |
Krishna Kumar | 7b3d3e4 | 2009-08-29 20:21:21 +0000 | [diff] [blame] | 2016 | netif_tx_stop_queue(txq); |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2017 | } |
| 2018 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2019 | /** |
| 2020 | * netif_subqueue_stopped - test status of subqueue |
| 2021 | * @dev: network device |
| 2022 | * @queue_index: sub queue index |
| 2023 | * |
| 2024 | * Check individual transmit queue of a device with multiple transmit queues. |
| 2025 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2026 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
| 2027 | u16 queue_index) |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2028 | { |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2029 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
Krishna Kumar | 7b3d3e4 | 2009-08-29 20:21:21 +0000 | [diff] [blame] | 2030 | |
| 2031 | return netif_tx_queue_stopped(txq); |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2032 | } |
| 2033 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2034 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
| 2035 | struct sk_buff *skb) |
Pavel Emelyanov | 668f895 | 2007-10-21 17:01:56 -0700 | [diff] [blame] | 2036 | { |
| 2037 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); |
| 2038 | } |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2039 | |
| 2040 | /** |
| 2041 | * netif_wake_subqueue - allow sending packets on subqueue |
| 2042 | * @dev: network device |
| 2043 | * @queue_index: sub queue index |
| 2044 | * |
| 2045 | * Resume individual transmit queue of a device with multiple transmit queues. |
| 2046 | */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2047 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
| 2048 | { |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2049 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2050 | #ifdef CONFIG_NETPOLL_TRAP |
| 2051 | if (netpoll_trap()) |
| 2052 | return; |
| 2053 | #endif |
Tom Herbert | 73466498 | 2011-11-28 16:32:44 +0000 | [diff] [blame] | 2054 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
David S. Miller | 37437bb | 2008-07-16 02:15:04 -0700 | [diff] [blame] | 2055 | __netif_schedule(txq->qdisc); |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2056 | } |
| 2057 | |
Vladislav Zolotarov | a3d22a6 | 2010-12-13 06:27:10 +0000 | [diff] [blame] | 2058 | /* |
| 2059 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used |
| 2060 | * as a distribution range limit for the returned value. |
| 2061 | */ |
| 2062 | static inline u16 skb_tx_hash(const struct net_device *dev, |
| 2063 | const struct sk_buff *skb) |
| 2064 | { |
| 2065 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); |
| 2066 | } |
| 2067 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2068 | /** |
| 2069 | * netif_is_multiqueue - test if device has multiple transmit queues |
| 2070 | * @dev: network device |
| 2071 | * |
| 2072 | * Check if device has multiple transmit queues |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2073 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2074 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2075 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 2076 | return dev->num_tx_queues > 1; |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2077 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | |
Tom Herbert | e648493 | 2010-10-18 18:04:39 +0000 | [diff] [blame] | 2079 | extern int netif_set_real_num_tx_queues(struct net_device *dev, |
| 2080 | unsigned int txq); |
John Fastabend | f0796d5 | 2010-07-01 13:21:57 +0000 | [diff] [blame] | 2081 | |
Ben Hutchings | 62fe0b4 | 2010-09-27 08:24:33 +0000 | [diff] [blame] | 2082 | #ifdef CONFIG_RPS |
| 2083 | extern int netif_set_real_num_rx_queues(struct net_device *dev, |
| 2084 | unsigned int rxq); |
| 2085 | #else |
| 2086 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, |
| 2087 | unsigned int rxq) |
| 2088 | { |
| 2089 | return 0; |
| 2090 | } |
| 2091 | #endif |
| 2092 | |
Ben Hutchings | 3171d02 | 2010-09-27 08:24:49 +0000 | [diff] [blame] | 2093 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
| 2094 | const struct net_device *from_dev) |
| 2095 | { |
| 2096 | netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues); |
| 2097 | #ifdef CONFIG_RPS |
| 2098 | return netif_set_real_num_rx_queues(to_dev, |
| 2099 | from_dev->real_num_rx_queues); |
| 2100 | #else |
| 2101 | return 0; |
| 2102 | #endif |
| 2103 | } |
| 2104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | /* Use this variant when it is known for sure that it |
Matti Linnanvuori | 0ef4730 | 2008-03-28 16:33:00 -0700 | [diff] [blame] | 2106 | * is executing from hardware interrupt context or with hardware interrupts |
| 2107 | * disabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2109 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | |
| 2111 | /* Use this variant in places where it could be invoked |
Matti Linnanvuori | 0ef4730 | 2008-03-28 16:33:00 -0700 | [diff] [blame] | 2112 | * from either hardware interrupt or other context, with hardware interrupts |
| 2113 | * either disabled or enabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | */ |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 2115 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | extern int netif_rx(struct sk_buff *skb); |
| 2118 | extern int netif_rx_ni(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | extern int netif_receive_skb(struct sk_buff *skb); |
Ben Hutchings | 5b252f0 | 2009-10-29 07:17:09 +0000 | [diff] [blame] | 2120 | extern gro_result_t dev_gro_receive(struct napi_struct *napi, |
Herbert Xu | 96e93ea | 2009-01-06 10:49:34 -0800 | [diff] [blame] | 2121 | struct sk_buff *skb); |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 2122 | extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); |
| 2123 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, |
Herbert Xu | d565b0a | 2008-12-15 23:38:52 -0800 | [diff] [blame] | 2124 | struct sk_buff *skb); |
Eric Dumazet | 86cac58 | 2010-08-31 18:25:32 +0000 | [diff] [blame] | 2125 | extern void napi_gro_flush(struct napi_struct *napi); |
Herbert Xu | 76620aa | 2009-04-16 02:02:07 -0700 | [diff] [blame] | 2126 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 2127 | extern gro_result_t napi_frags_finish(struct napi_struct *napi, |
Ben Hutchings | 5b252f0 | 2009-10-29 07:17:09 +0000 | [diff] [blame] | 2128 | struct sk_buff *skb, |
| 2129 | gro_result_t ret); |
Herbert Xu | 76620aa | 2009-04-16 02:02:07 -0700 | [diff] [blame] | 2130 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); |
Ben Hutchings | c7c4b3b | 2009-10-29 21:36:53 -0700 | [diff] [blame] | 2131 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); |
Herbert Xu | 76620aa | 2009-04-16 02:02:07 -0700 | [diff] [blame] | 2132 | |
| 2133 | static inline void napi_free_frags(struct napi_struct *napi) |
| 2134 | { |
| 2135 | kfree_skb(napi->skb); |
| 2136 | napi->skb = NULL; |
| 2137 | } |
| 2138 | |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 2139 | extern int netdev_rx_handler_register(struct net_device *dev, |
Jiri Pirko | 93e2c32 | 2010-06-10 03:34:59 +0000 | [diff] [blame] | 2140 | rx_handler_func_t *rx_handler, |
| 2141 | void *rx_handler_data); |
Jiri Pirko | ab95bfe | 2010-06-01 21:52:08 +0000 | [diff] [blame] | 2142 | extern void netdev_rx_handler_unregister(struct net_device *dev); |
| 2143 | |
David S. Miller | 95f050b | 2012-03-06 16:12:15 -0500 | [diff] [blame] | 2144 | extern bool dev_valid_name(const char *name); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 2145 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
| 2146 | extern int dev_ethtool(struct net *net, struct ifreq *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | extern unsigned dev_get_flags(const struct net_device *); |
Patrick McHardy | bd38081 | 2010-02-26 06:34:53 +0000 | [diff] [blame] | 2148 | extern int __dev_change_flags(struct net_device *, unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | extern int dev_change_flags(struct net_device *, unsigned); |
Patrick McHardy | bd38081 | 2010-02-26 06:34:53 +0000 | [diff] [blame] | 2150 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
Stephen Hemminger | cf04a4c7 | 2008-09-30 02:22:14 -0700 | [diff] [blame] | 2151 | extern int dev_change_name(struct net_device *, const char *); |
Stephen Hemminger | 0b815a1 | 2008-09-22 21:28:11 -0700 | [diff] [blame] | 2152 | extern int dev_set_alias(struct net_device *, const char *, size_t); |
Eric W. Biederman | ce286d3 | 2007-09-12 13:53:49 +0200 | [diff] [blame] | 2153 | extern int dev_change_net_namespace(struct net_device *, |
| 2154 | struct net *, const char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | extern int dev_set_mtu(struct net_device *, int); |
Vlad Dogaru | cbda10f | 2011-01-13 23:38:30 +0000 | [diff] [blame] | 2156 | extern void dev_set_group(struct net_device *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | extern int dev_set_mac_address(struct net_device *, |
| 2158 | struct sockaddr *); |
Herbert Xu | f6a78bf | 2006-06-22 02:57:17 -0700 | [diff] [blame] | 2159 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2160 | struct net_device *dev, |
| 2161 | struct netdev_queue *txq); |
Arnd Bergmann | 4454096 | 2009-11-26 06:07:08 +0000 | [diff] [blame] | 2162 | extern int dev_forward_skb(struct net_device *dev, |
| 2163 | struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 2165 | extern int netdev_budget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | |
| 2167 | /* Called by rtnetlink.c:rtnl_unlock() */ |
| 2168 | extern void netdev_run_todo(void); |
| 2169 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2170 | /** |
| 2171 | * dev_put - release reference to device |
| 2172 | * @dev: network device |
| 2173 | * |
Benjamin Thery | 9ef4429 | 2007-10-10 21:18:17 -0700 | [diff] [blame] | 2174 | * Release reference to device to allow it to be freed. |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2175 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | static inline void dev_put(struct net_device *dev) |
| 2177 | { |
Christoph Lameter | 933393f | 2011-12-22 11:58:51 -0600 | [diff] [blame] | 2178 | this_cpu_dec(*dev->pcpu_refcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | } |
| 2180 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2181 | /** |
| 2182 | * dev_hold - get reference to device |
| 2183 | * @dev: network device |
| 2184 | * |
Benjamin Thery | 9ef4429 | 2007-10-10 21:18:17 -0700 | [diff] [blame] | 2185 | * Hold reference to device to keep it from being freed. |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2186 | */ |
Stephen Hemminger | 1533306 | 2006-03-20 22:32:28 -0800 | [diff] [blame] | 2187 | static inline void dev_hold(struct net_device *dev) |
| 2188 | { |
Christoph Lameter | 933393f | 2011-12-22 11:58:51 -0600 | [diff] [blame] | 2189 | this_cpu_inc(*dev->pcpu_refcnt); |
Stephen Hemminger | 1533306 | 2006-03-20 22:32:28 -0800 | [diff] [blame] | 2190 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | |
| 2192 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
| 2193 | * and _off may be called from IRQ context, but it is caller |
| 2194 | * who is responsible for serialization of these calls. |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 2195 | * |
| 2196 | * The name carrier is inappropriate, these functions should really be |
| 2197 | * called netif_lowerlayer_*() because they represent the state of any |
| 2198 | * kind of lower layer not just hardware media. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | */ |
| 2200 | |
| 2201 | extern void linkwatch_fire_event(struct net_device *dev); |
Eric Dumazet | e014deb | 2009-11-17 05:59:21 +0000 | [diff] [blame] | 2202 | extern void linkwatch_forget_dev(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2204 | /** |
| 2205 | * netif_carrier_ok - test if carrier present |
| 2206 | * @dev: network device |
| 2207 | * |
| 2208 | * Check if carrier is present on device |
| 2209 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2210 | static inline bool netif_carrier_ok(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | { |
| 2212 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
| 2213 | } |
| 2214 | |
Eric Dumazet | 9d21493 | 2009-05-17 20:55:16 -0700 | [diff] [blame] | 2215 | extern unsigned long dev_trans_start(struct net_device *dev); |
| 2216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2217 | extern void __netdev_watchdog_up(struct net_device *dev); |
| 2218 | |
Denis Vlasenko | 0a242ef | 2005-08-11 15:32:53 -0700 | [diff] [blame] | 2219 | extern void netif_carrier_on(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | |
Denis Vlasenko | 0a242ef | 2005-08-11 15:32:53 -0700 | [diff] [blame] | 2221 | extern void netif_carrier_off(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | |
Ian Campbell | 06c4648 | 2010-05-26 00:09:42 +0000 | [diff] [blame] | 2223 | extern void netif_notify_peers(struct net_device *dev); |
| 2224 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2225 | /** |
| 2226 | * netif_dormant_on - mark device as dormant. |
| 2227 | * @dev: network device |
| 2228 | * |
| 2229 | * Mark device as dormant (as per RFC2863). |
| 2230 | * |
| 2231 | * The dormant state indicates that the relevant interface is not |
| 2232 | * actually in a condition to pass packets (i.e., it is not 'up') but is |
| 2233 | * in a "pending" state, waiting for some external event. For "on- |
| 2234 | * demand" interfaces, this new state identifies the situation where the |
| 2235 | * interface is waiting for events to place it in the up state. |
| 2236 | * |
| 2237 | */ |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 2238 | static inline void netif_dormant_on(struct net_device *dev) |
| 2239 | { |
| 2240 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 2241 | linkwatch_fire_event(dev); |
| 2242 | } |
| 2243 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2244 | /** |
| 2245 | * netif_dormant_off - set device as not dormant. |
| 2246 | * @dev: network device |
| 2247 | * |
| 2248 | * Device is not in dormant state. |
| 2249 | */ |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 2250 | static inline void netif_dormant_off(struct net_device *dev) |
| 2251 | { |
| 2252 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 2253 | linkwatch_fire_event(dev); |
| 2254 | } |
| 2255 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2256 | /** |
| 2257 | * netif_dormant - test if carrier present |
| 2258 | * @dev: network device |
| 2259 | * |
| 2260 | * Check if carrier is present on device |
| 2261 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2262 | static inline bool netif_dormant(const struct net_device *dev) |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 2263 | { |
| 2264 | return test_bit(__LINK_STATE_DORMANT, &dev->state); |
| 2265 | } |
| 2266 | |
| 2267 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2268 | /** |
| 2269 | * netif_oper_up - test if device is operational |
| 2270 | * @dev: network device |
| 2271 | * |
| 2272 | * Check if carrier is operational |
| 2273 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2274 | static inline bool netif_oper_up(const struct net_device *dev) |
Eric Dumazet | d94d9fe | 2009-11-04 09:50:58 -0800 | [diff] [blame] | 2275 | { |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 2276 | return (dev->operstate == IF_OPER_UP || |
| 2277 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); |
| 2278 | } |
| 2279 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 2280 | /** |
| 2281 | * netif_device_present - is device available or removed |
| 2282 | * @dev: network device |
| 2283 | * |
| 2284 | * Check if device has not been removed from system. |
| 2285 | */ |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2286 | static inline bool netif_device_present(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | { |
| 2288 | return test_bit(__LINK_STATE_PRESENT, &dev->state); |
| 2289 | } |
| 2290 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 2291 | extern void netif_device_detach(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 2293 | extern void netif_device_attach(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2294 | |
| 2295 | /* |
| 2296 | * Network interface message level settings |
| 2297 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2298 | |
| 2299 | enum { |
| 2300 | NETIF_MSG_DRV = 0x0001, |
| 2301 | NETIF_MSG_PROBE = 0x0002, |
| 2302 | NETIF_MSG_LINK = 0x0004, |
| 2303 | NETIF_MSG_TIMER = 0x0008, |
| 2304 | NETIF_MSG_IFDOWN = 0x0010, |
| 2305 | NETIF_MSG_IFUP = 0x0020, |
| 2306 | NETIF_MSG_RX_ERR = 0x0040, |
| 2307 | NETIF_MSG_TX_ERR = 0x0080, |
| 2308 | NETIF_MSG_TX_QUEUED = 0x0100, |
| 2309 | NETIF_MSG_INTR = 0x0200, |
| 2310 | NETIF_MSG_TX_DONE = 0x0400, |
| 2311 | NETIF_MSG_RX_STATUS = 0x0800, |
| 2312 | NETIF_MSG_PKTDATA = 0x1000, |
| 2313 | NETIF_MSG_HW = 0x2000, |
| 2314 | NETIF_MSG_WOL = 0x4000, |
| 2315 | }; |
| 2316 | |
| 2317 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
| 2318 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
| 2319 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
| 2320 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
| 2321 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
| 2322 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
| 2323 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
| 2324 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
| 2325 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
| 2326 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
| 2327 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
| 2328 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
| 2329 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
| 2330 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
| 2331 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
| 2332 | |
| 2333 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) |
| 2334 | { |
| 2335 | /* use default */ |
| 2336 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) |
| 2337 | return default_msg_enable_bits; |
| 2338 | if (debug_value == 0) /* no output */ |
| 2339 | return 0; |
| 2340 | /* set low N bits */ |
| 2341 | return (1 << debug_value) - 1; |
| 2342 | } |
| 2343 | |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2344 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 2345 | { |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2346 | spin_lock(&txq->_xmit_lock); |
| 2347 | txq->xmit_lock_owner = cpu; |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 2348 | } |
| 2349 | |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2350 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
| 2351 | { |
| 2352 | spin_lock_bh(&txq->_xmit_lock); |
| 2353 | txq->xmit_lock_owner = smp_processor_id(); |
| 2354 | } |
| 2355 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2356 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2357 | { |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2358 | bool ok = spin_trylock(&txq->_xmit_lock); |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2359 | if (likely(ok)) |
| 2360 | txq->xmit_lock_owner = smp_processor_id(); |
| 2361 | return ok; |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 2362 | } |
| 2363 | |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2364 | static inline void __netif_tx_unlock(struct netdev_queue *txq) |
| 2365 | { |
| 2366 | txq->xmit_lock_owner = -1; |
| 2367 | spin_unlock(&txq->_xmit_lock); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 2368 | } |
| 2369 | |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2370 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) |
| 2371 | { |
| 2372 | txq->xmit_lock_owner = -1; |
| 2373 | spin_unlock_bh(&txq->_xmit_lock); |
| 2374 | } |
| 2375 | |
Eric Dumazet | 08baf56 | 2009-05-25 22:58:01 -0700 | [diff] [blame] | 2376 | static inline void txq_trans_update(struct netdev_queue *txq) |
| 2377 | { |
| 2378 | if (txq->xmit_lock_owner != -1) |
| 2379 | txq->trans_start = jiffies; |
| 2380 | } |
| 2381 | |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2382 | /** |
| 2383 | * netif_tx_lock - grab network device transmit lock |
| 2384 | * @dev: network device |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2385 | * |
| 2386 | * Get network device transmit lock |
| 2387 | */ |
| 2388 | static inline void netif_tx_lock(struct net_device *dev) |
| 2389 | { |
| 2390 | unsigned int i; |
| 2391 | int cpu; |
| 2392 | |
| 2393 | spin_lock(&dev->tx_global_lock); |
| 2394 | cpu = smp_processor_id(); |
| 2395 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 2396 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| 2397 | |
| 2398 | /* We are the only thread of execution doing a |
| 2399 | * freeze, but we have to grab the _xmit_lock in |
| 2400 | * order to synchronize with threads which are in |
| 2401 | * the ->hard_start_xmit() handler and already |
| 2402 | * checked the frozen bit. |
| 2403 | */ |
| 2404 | __netif_tx_lock(txq, cpu); |
| 2405 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
| 2406 | __netif_tx_unlock(txq); |
| 2407 | } |
| 2408 | } |
| 2409 | |
| 2410 | static inline void netif_tx_lock_bh(struct net_device *dev) |
| 2411 | { |
| 2412 | local_bh_disable(); |
| 2413 | netif_tx_lock(dev); |
| 2414 | } |
| 2415 | |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 2416 | static inline void netif_tx_unlock(struct net_device *dev) |
| 2417 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 2418 | unsigned int i; |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2419 | |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 2420 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 2421 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 2422 | |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2423 | /* No need to grab the _xmit_lock here. If the |
| 2424 | * queue is not stopped for another reason, we |
| 2425 | * force a schedule. |
| 2426 | */ |
| 2427 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); |
Krishna Kumar | 7b3d3e4 | 2009-08-29 20:21:21 +0000 | [diff] [blame] | 2428 | netif_schedule_queue(txq); |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2429 | } |
| 2430 | spin_unlock(&dev->tx_global_lock); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 2431 | } |
| 2432 | |
| 2433 | static inline void netif_tx_unlock_bh(struct net_device *dev) |
| 2434 | { |
David S. Miller | e8a0464 | 2008-07-17 00:34:19 -0700 | [diff] [blame] | 2435 | netif_tx_unlock(dev); |
| 2436 | local_bh_enable(); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 2437 | } |
| 2438 | |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2439 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 2440 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2441 | __netif_tx_lock(txq, cpu); \ |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 2442 | } \ |
| 2443 | } |
| 2444 | |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2445 | #define HARD_TX_UNLOCK(dev, txq) { \ |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 2446 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
David S. Miller | c773e84 | 2008-07-08 23:13:53 -0700 | [diff] [blame] | 2447 | __netif_tx_unlock(txq); \ |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 2448 | } \ |
| 2449 | } |
| 2450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | static inline void netif_tx_disable(struct net_device *dev) |
| 2452 | { |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2453 | unsigned int i; |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2454 | int cpu; |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2455 | |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2456 | local_bh_disable(); |
| 2457 | cpu = smp_processor_id(); |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2458 | for (i = 0; i < dev->num_tx_queues; i++) { |
| 2459 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2460 | |
| 2461 | __netif_tx_lock(txq, cpu); |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2462 | netif_tx_stop_queue(txq); |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2463 | __netif_tx_unlock(txq); |
David S. Miller | fd2ea0a | 2008-07-17 01:56:23 -0700 | [diff] [blame] | 2464 | } |
David S. Miller | c3f26a2 | 2008-07-31 16:58:50 -0700 | [diff] [blame] | 2465 | local_bh_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | } |
| 2467 | |
David S. Miller | e308a5d | 2008-07-15 00:13:44 -0700 | [diff] [blame] | 2468 | static inline void netif_addr_lock(struct net_device *dev) |
| 2469 | { |
| 2470 | spin_lock(&dev->addr_list_lock); |
| 2471 | } |
| 2472 | |
Jiri Pirko | 2429f7a | 2012-01-09 06:36:54 +0000 | [diff] [blame] | 2473 | static inline void netif_addr_lock_nested(struct net_device *dev) |
| 2474 | { |
| 2475 | spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); |
| 2476 | } |
| 2477 | |
David S. Miller | e308a5d | 2008-07-15 00:13:44 -0700 | [diff] [blame] | 2478 | static inline void netif_addr_lock_bh(struct net_device *dev) |
| 2479 | { |
| 2480 | spin_lock_bh(&dev->addr_list_lock); |
| 2481 | } |
| 2482 | |
| 2483 | static inline void netif_addr_unlock(struct net_device *dev) |
| 2484 | { |
| 2485 | spin_unlock(&dev->addr_list_lock); |
| 2486 | } |
| 2487 | |
| 2488 | static inline void netif_addr_unlock_bh(struct net_device *dev) |
| 2489 | { |
| 2490 | spin_unlock_bh(&dev->addr_list_lock); |
| 2491 | } |
| 2492 | |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 2493 | /* |
Jiri Pirko | 31278e7 | 2009-06-17 01:12:19 +0000 | [diff] [blame] | 2494 | * dev_addrs walker. Should be used only for read access. Call with |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 2495 | * rcu_read_lock held. |
| 2496 | */ |
| 2497 | #define for_each_dev_addr(dev, ha) \ |
Jiri Pirko | 31278e7 | 2009-06-17 01:12:19 +0000 | [diff] [blame] | 2498 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 2499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
| 2501 | |
| 2502 | extern void ether_setup(struct net_device *dev); |
| 2503 | |
| 2504 | /* Support for loadable net-drivers */ |
Tom Herbert | 36909ea | 2011-01-09 19:36:31 +0000 | [diff] [blame] | 2505 | extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2506 | void (*setup)(struct net_device *), |
Tom Herbert | 36909ea | 2011-01-09 19:36:31 +0000 | [diff] [blame] | 2507 | unsigned int txqs, unsigned int rxqs); |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 2508 | #define alloc_netdev(sizeof_priv, name, setup) \ |
Tom Herbert | 36909ea | 2011-01-09 19:36:31 +0000 | [diff] [blame] | 2509 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
| 2510 | |
| 2511 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ |
| 2512 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) |
| 2513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | extern int register_netdev(struct net_device *dev); |
| 2515 | extern void unregister_netdev(struct net_device *dev); |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 2516 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 2517 | /* General hardware address lists handling functions */ |
| 2518 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, |
| 2519 | struct netdev_hw_addr_list *from_list, |
| 2520 | int addr_len, unsigned char addr_type); |
| 2521 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
| 2522 | struct netdev_hw_addr_list *from_list, |
| 2523 | int addr_len, unsigned char addr_type); |
| 2524 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| 2525 | struct netdev_hw_addr_list *from_list, |
| 2526 | int addr_len); |
| 2527 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| 2528 | struct netdev_hw_addr_list *from_list, |
| 2529 | int addr_len); |
| 2530 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); |
| 2531 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); |
| 2532 | |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 2533 | /* Functions used for device addresses handling */ |
| 2534 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, |
| 2535 | unsigned char addr_type); |
| 2536 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, |
| 2537 | unsigned char addr_type); |
| 2538 | extern int dev_addr_add_multiple(struct net_device *to_dev, |
| 2539 | struct net_device *from_dev, |
| 2540 | unsigned char addr_type); |
| 2541 | extern int dev_addr_del_multiple(struct net_device *to_dev, |
| 2542 | struct net_device *from_dev, |
| 2543 | unsigned char addr_type); |
Jiri Pirko | a748ee2 | 2010-04-01 21:22:09 +0000 | [diff] [blame] | 2544 | extern void dev_addr_flush(struct net_device *dev); |
| 2545 | extern int dev_addr_init(struct net_device *dev); |
| 2546 | |
| 2547 | /* Functions used for unicast addresses handling */ |
| 2548 | extern int dev_uc_add(struct net_device *dev, unsigned char *addr); |
| 2549 | extern int dev_uc_del(struct net_device *dev, unsigned char *addr); |
| 2550 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); |
| 2551 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); |
| 2552 | extern void dev_uc_flush(struct net_device *dev); |
| 2553 | extern void dev_uc_init(struct net_device *dev); |
Jiri Pirko | f001fde | 2009-05-05 02:48:28 +0000 | [diff] [blame] | 2554 | |
Jiri Pirko | 22bedad3 | 2010-04-01 21:22:57 +0000 | [diff] [blame] | 2555 | /* Functions used for multicast addresses handling */ |
| 2556 | extern int dev_mc_add(struct net_device *dev, unsigned char *addr); |
| 2557 | extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); |
| 2558 | extern int dev_mc_del(struct net_device *dev, unsigned char *addr); |
| 2559 | extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); |
| 2560 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); |
| 2561 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); |
| 2562 | extern void dev_mc_flush(struct net_device *dev); |
| 2563 | extern void dev_mc_init(struct net_device *dev); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2564 | |
| 2565 | /* Functions used for secondary unicast and multicast support */ |
| 2566 | extern void dev_set_rx_mode(struct net_device *dev); |
| 2567 | extern void __dev_set_rx_mode(struct net_device *dev); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2568 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
| 2569 | extern int dev_set_allmulti(struct net_device *dev, int inc); |
| 2570 | extern void netdev_state_change(struct net_device *dev); |
Jiri Pirko | 3ca5b40 | 2010-03-10 10:29:35 +0000 | [diff] [blame] | 2571 | extern int netdev_bonding_change(struct net_device *dev, |
Moni Shoua | 75c7850 | 2009-09-15 02:37:40 -0700 | [diff] [blame] | 2572 | unsigned long event); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2573 | extern void netdev_features_change(struct net_device *dev); |
| 2574 | /* Load a device via the kmod */ |
| 2575 | extern void dev_load(struct net *net, const char *name); |
| 2576 | extern void dev_mcast_init(void); |
Ben Hutchings | d775351 | 2010-07-09 09:12:41 +0000 | [diff] [blame] | 2577 | extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
| 2578 | struct rtnl_link_stats64 *storage); |
Eric Dumazet | 77a1abf | 2012-03-05 04:50:09 +0000 | [diff] [blame] | 2579 | extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, |
| 2580 | const struct net_device_stats *netdev_stats); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2581 | |
| 2582 | extern int netdev_max_backlog; |
Eric Dumazet | 3b098e2 | 2010-05-15 23:57:10 -0700 | [diff] [blame] | 2583 | extern int netdev_tstamp_prequeue; |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2584 | extern int weight_p; |
Eric Dumazet | 0a14842 | 2011-04-20 09:27:32 +0000 | [diff] [blame] | 2585 | extern int bpf_jit_enable; |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2586 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); |
Jiri Pirko | 1765a57 | 2011-02-12 06:48:36 +0000 | [diff] [blame] | 2587 | extern int netdev_set_bond_master(struct net_device *dev, |
| 2588 | struct net_device *master); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2589 | extern int skb_checksum_help(struct sk_buff *skb); |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 2590 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, |
| 2591 | netdev_features_t features); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 2592 | #ifdef CONFIG_BUG |
| 2593 | extern void netdev_rx_csum_fault(struct net_device *dev); |
| 2594 | #else |
| 2595 | static inline void netdev_rx_csum_fault(struct net_device *dev) |
| 2596 | { |
| 2597 | } |
| 2598 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | /* rx skb timestamps */ |
| 2600 | extern void net_enable_timestamp(void); |
| 2601 | extern void net_disable_timestamp(void); |
| 2602 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 2603 | #ifdef CONFIG_PROC_FS |
| 2604 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); |
| 2605 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); |
| 2606 | extern void dev_seq_stop(struct seq_file *seq, void *v); |
| 2607 | #endif |
| 2608 | |
Jay Vosburgh | b8a9787 | 2008-06-13 18:12:04 -0700 | [diff] [blame] | 2609 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
| 2610 | extern void netdev_class_remove_file(struct class_attribute *class_attr); |
| 2611 | |
Johannes Berg | 0460079 | 2010-08-05 17:45:15 +0200 | [diff] [blame] | 2612 | extern struct kobj_ns_type_operations net_ns_type_operations; |
| 2613 | |
David S. Miller | 3019de1 | 2011-06-06 16:41:33 -0700 | [diff] [blame] | 2614 | extern const char *netdev_drivername(const struct net_device *dev); |
Arjan van de Ven | 6579e57 | 2008-07-21 13:31:48 -0700 | [diff] [blame] | 2615 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 2616 | extern void linkwatch_run_queue(void); |
| 2617 | |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 2618 | static inline netdev_features_t netdev_get_wanted_features( |
| 2619 | struct net_device *dev) |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 2620 | { |
| 2621 | return (dev->features & ~dev->hw_features) | dev->wanted_features; |
| 2622 | } |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 2623 | netdev_features_t netdev_increment_features(netdev_features_t all, |
| 2624 | netdev_features_t one, netdev_features_t mask); |
Michał Mirosław | 6cb6a27 | 2011-04-02 22:48:47 -0700 | [diff] [blame] | 2625 | int __netdev_update_features(struct net_device *dev); |
Michał Mirosław | 5455c69 | 2011-02-15 16:59:17 +0000 | [diff] [blame] | 2626 | void netdev_update_features(struct net_device *dev); |
Michał Mirosław | afe12cc | 2011-05-07 03:22:17 +0000 | [diff] [blame] | 2627 | void netdev_change_features(struct net_device *dev); |
Herbert Xu | 7f353bf | 2007-08-10 15:47:58 -0700 | [diff] [blame] | 2628 | |
Patrick Mullaney | fc4a748 | 2009-12-03 15:59:22 -0800 | [diff] [blame] | 2629 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
| 2630 | struct net_device *dev); |
| 2631 | |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 2632 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
Jesse Gross | 58e998c | 2010-10-29 12:14:55 +0000 | [diff] [blame] | 2633 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2634 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
Herbert Xu | bcd7611 | 2006-06-30 13:36:35 -0700 | [diff] [blame] | 2635 | { |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 2636 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
Michał Mirosław | 0345e18 | 2011-11-16 14:05:33 +0000 | [diff] [blame] | 2637 | |
| 2638 | /* check flags correspondence */ |
| 2639 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); |
| 2640 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); |
| 2641 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); |
| 2642 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); |
| 2643 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
| 2644 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); |
| 2645 | |
Herbert Xu | bcd7611 | 2006-06-30 13:36:35 -0700 | [diff] [blame] | 2646 | return (features & feature) == feature; |
| 2647 | } |
| 2648 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2649 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 2650 | { |
Herbert Xu | 278b251 | 2009-06-03 21:20:51 -0700 | [diff] [blame] | 2651 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
David S. Miller | 21dc330 | 2010-08-23 00:13:46 -0700 | [diff] [blame] | 2652 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 2653 | } |
| 2654 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2655 | static inline bool netif_needs_gso(struct sk_buff *skb, |
| 2656 | netdev_features_t features) |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame] | 2657 | { |
Jesse Gross | fc74121 | 2011-01-09 06:23:32 +0000 | [diff] [blame] | 2658 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
Yi Zou | cdbee74 | 2012-03-16 23:08:11 +0000 | [diff] [blame] | 2659 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
| 2660 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame] | 2661 | } |
| 2662 | |
Peter P Waskiewicz Jr | 82cc1a7 | 2008-03-21 03:43:19 -0700 | [diff] [blame] | 2663 | static inline void netif_set_gso_max_size(struct net_device *dev, |
| 2664 | unsigned int size) |
| 2665 | { |
| 2666 | dev->gso_max_size = size; |
| 2667 | } |
| 2668 | |
David S. Miller | 4d29515 | 2012-03-07 21:02:35 -0500 | [diff] [blame] | 2669 | static inline bool netif_is_bond_slave(struct net_device *dev) |
Jiri Pirko | 1765a57 | 2011-02-12 06:48:36 +0000 | [diff] [blame] | 2670 | { |
| 2671 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; |
| 2672 | } |
| 2673 | |
Ben Greear | 3bdc0eb | 2012-02-11 15:39:30 +0000 | [diff] [blame] | 2674 | static inline bool netif_supports_nofcs(struct net_device *dev) |
| 2675 | { |
| 2676 | return dev->priv_flags & IFF_SUPP_NOFCS; |
| 2677 | } |
| 2678 | |
Eric W. Biederman | 505d4f7 | 2008-11-07 22:54:20 -0800 | [diff] [blame] | 2679 | extern struct pernet_operations __net_initdata loopback_net_ops; |
Patrick McHardy | b1b67dd | 2009-04-20 04:49:28 +0000 | [diff] [blame] | 2680 | |
Joe Perches | 571ba42 | 2010-02-09 11:49:47 +0000 | [diff] [blame] | 2681 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
| 2682 | |
| 2683 | /* netdev_printk helpers, similar to dev_printk */ |
| 2684 | |
| 2685 | static inline const char *netdev_name(const struct net_device *dev) |
| 2686 | { |
| 2687 | if (dev->reg_state != NETREG_REGISTERED) |
| 2688 | return "(unregistered net_device)"; |
| 2689 | return dev->name; |
| 2690 | } |
| 2691 | |
Jason Baron | ffa10cb | 2011-08-11 14:36:48 -0400 | [diff] [blame] | 2692 | extern int __netdev_printk(const char *level, const struct net_device *dev, |
| 2693 | struct va_format *vaf); |
| 2694 | |
Joe Perches | b9075fa | 2011-10-31 17:11:33 -0700 | [diff] [blame] | 2695 | extern __printf(3, 4) |
| 2696 | int netdev_printk(const char *level, const struct net_device *dev, |
| 2697 | const char *format, ...); |
| 2698 | extern __printf(2, 3) |
| 2699 | int netdev_emerg(const struct net_device *dev, const char *format, ...); |
| 2700 | extern __printf(2, 3) |
| 2701 | int netdev_alert(const struct net_device *dev, const char *format, ...); |
| 2702 | extern __printf(2, 3) |
| 2703 | int netdev_crit(const struct net_device *dev, const char *format, ...); |
| 2704 | extern __printf(2, 3) |
| 2705 | int netdev_err(const struct net_device *dev, const char *format, ...); |
| 2706 | extern __printf(2, 3) |
| 2707 | int netdev_warn(const struct net_device *dev, const char *format, ...); |
| 2708 | extern __printf(2, 3) |
| 2709 | int netdev_notice(const struct net_device *dev, const char *format, ...); |
| 2710 | extern __printf(2, 3) |
| 2711 | int netdev_info(const struct net_device *dev, const char *format, ...); |
Joe Perches | 571ba42 | 2010-02-09 11:49:47 +0000 | [diff] [blame] | 2712 | |
Vasiliy Kulikov | 8909c9a | 2011-03-02 00:33:13 +0300 | [diff] [blame] | 2713 | #define MODULE_ALIAS_NETDEV(device) \ |
| 2714 | MODULE_ALIAS("netdev-" device) |
| 2715 | |
Jim Cromie | b558c96 | 2011-12-19 17:11:18 -0500 | [diff] [blame] | 2716 | #if defined(CONFIG_DYNAMIC_DEBUG) |
Joe Perches | 571ba42 | 2010-02-09 11:49:47 +0000 | [diff] [blame] | 2717 | #define netdev_dbg(__dev, format, args...) \ |
| 2718 | do { \ |
Jason Baron | ffa10cb | 2011-08-11 14:36:48 -0400 | [diff] [blame] | 2719 | dynamic_netdev_dbg(__dev, format, ##args); \ |
Joe Perches | 571ba42 | 2010-02-09 11:49:47 +0000 | [diff] [blame] | 2720 | } while (0) |
Jim Cromie | b558c96 | 2011-12-19 17:11:18 -0500 | [diff] [blame] | 2721 | #elif defined(DEBUG) |
| 2722 | #define netdev_dbg(__dev, format, args...) \ |
| 2723 | netdev_printk(KERN_DEBUG, __dev, format, ##args) |
Joe Perches | 571ba42 | 2010-02-09 11:49:47 +0000 | [diff] [blame] | 2724 | #else |
| 2725 | #define netdev_dbg(__dev, format, args...) \ |
| 2726 | ({ \ |
| 2727 | if (0) \ |
| 2728 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ |
| 2729 | 0; \ |
| 2730 | }) |
| 2731 | #endif |
| 2732 | |
| 2733 | #if defined(VERBOSE_DEBUG) |
| 2734 | #define netdev_vdbg netdev_dbg |
| 2735 | #else |
| 2736 | |
| 2737 | #define netdev_vdbg(dev, format, args...) \ |
| 2738 | ({ \ |
| 2739 | if (0) \ |
| 2740 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ |
| 2741 | 0; \ |
| 2742 | }) |
| 2743 | #endif |
| 2744 | |
| 2745 | /* |
| 2746 | * netdev_WARN() acts like dev_printk(), but with the key difference |
| 2747 | * of using a WARN/WARN_ON to get the message out, including the |
| 2748 | * file/line information and a backtrace. |
| 2749 | */ |
| 2750 | #define netdev_WARN(dev, format, args...) \ |
| 2751 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); |
| 2752 | |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2753 | /* netif printk helpers, similar to netdev_printk */ |
| 2754 | |
| 2755 | #define netif_printk(priv, type, level, dev, fmt, args...) \ |
| 2756 | do { \ |
| 2757 | if (netif_msg_##type(priv)) \ |
| 2758 | netdev_printk(level, (dev), fmt, ##args); \ |
| 2759 | } while (0) |
| 2760 | |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2761 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
| 2762 | do { \ |
| 2763 | if (netif_msg_##type(priv)) \ |
| 2764 | netdev_##level(dev, fmt, ##args); \ |
| 2765 | } while (0) |
| 2766 | |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2767 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2768 | netif_level(emerg, priv, type, dev, fmt, ##args) |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2769 | #define netif_alert(priv, type, dev, fmt, args...) \ |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2770 | netif_level(alert, priv, type, dev, fmt, ##args) |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2771 | #define netif_crit(priv, type, dev, fmt, args...) \ |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2772 | netif_level(crit, priv, type, dev, fmt, ##args) |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2773 | #define netif_err(priv, type, dev, fmt, args...) \ |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2774 | netif_level(err, priv, type, dev, fmt, ##args) |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2775 | #define netif_warn(priv, type, dev, fmt, args...) \ |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2776 | netif_level(warn, priv, type, dev, fmt, ##args) |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2777 | #define netif_notice(priv, type, dev, fmt, args...) \ |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2778 | netif_level(notice, priv, type, dev, fmt, ##args) |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2779 | #define netif_info(priv, type, dev, fmt, args...) \ |
Joe Perches | f45f432 | 2010-06-27 01:02:36 +0000 | [diff] [blame] | 2780 | netif_level(info, priv, type, dev, fmt, ##args) |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2781 | |
| 2782 | #if defined(DEBUG) |
| 2783 | #define netif_dbg(priv, type, dev, format, args...) \ |
| 2784 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) |
| 2785 | #elif defined(CONFIG_DYNAMIC_DEBUG) |
| 2786 | #define netif_dbg(priv, type, netdev, format, args...) \ |
| 2787 | do { \ |
| 2788 | if (netif_msg_##type(priv)) \ |
Jason Baron | b5fb0a0 | 2011-08-11 14:36:53 -0400 | [diff] [blame] | 2789 | dynamic_netdev_dbg(netdev, format, ##args); \ |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2790 | } while (0) |
| 2791 | #else |
| 2792 | #define netif_dbg(priv, type, dev, format, args...) \ |
| 2793 | ({ \ |
| 2794 | if (0) \ |
| 2795 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
| 2796 | 0; \ |
| 2797 | }) |
| 2798 | #endif |
| 2799 | |
| 2800 | #if defined(VERBOSE_DEBUG) |
Ben Hutchings | bcfcc45 | 2010-07-02 07:08:44 +0000 | [diff] [blame] | 2801 | #define netif_vdbg netif_dbg |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2802 | #else |
| 2803 | #define netif_vdbg(priv, type, dev, format, args...) \ |
| 2804 | ({ \ |
| 2805 | if (0) \ |
Ben Hutchings | a4ed89c | 2010-05-18 06:56:32 +0000 | [diff] [blame] | 2806 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
Joe Perches | b3d95c5 | 2010-02-09 11:49:49 +0000 | [diff] [blame] | 2807 | 0; \ |
| 2808 | }) |
| 2809 | #endif |
Joe Perches | 571ba42 | 2010-02-09 11:49:47 +0000 | [diff] [blame] | 2810 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2811 | #endif /* __KERNEL__ */ |
| 2812 | |
Jiri Pirko | 385a154 | 2009-05-27 15:48:07 -0700 | [diff] [blame] | 2813 | #endif /* _LINUX_NETDEVICE_H */ |