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> |
| 14 | * Alan Cox, <Alan.Cox@linux.org> |
| 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> |
| 31 | |
| 32 | #ifdef __KERNEL__ |
Al Viro | d7fe0f2 | 2006-12-03 23:15:30 -0500 | [diff] [blame] | 33 | #include <linux/timer.h> |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 34 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <asm/atomic.h> |
| 36 | #include <asm/cache.h> |
| 37 | #include <asm/byteorder.h> |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <linux/device.h> |
| 40 | #include <linux/percpu.h> |
Chris Leech | db21733 | 2006-06-17 21:24:58 -0700 | [diff] [blame] | 41 | #include <linux/dmaengine.h> |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 42 | #include <linux/workqueue.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 44 | #include <net/net_namespace.h> |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | struct vlan_group; |
| 47 | struct ethtool_ops; |
Jeff Moyer | 115c1d6 | 2005-06-22 22:05:31 -0700 | [diff] [blame] | 48 | struct netpoll_info; |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 49 | /* 802.11 specific */ |
| 50 | struct wireless_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | /* source back-compat hooks */ |
| 52 | #define SET_ETHTOOL_OPS(netdev,ops) \ |
| 53 | ( (netdev)->ethtool_ops = (ops) ) |
| 54 | |
| 55 | #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev |
| 56 | functions are available. */ |
| 57 | #define HAVE_FREE_NETDEV /* free_netdev() */ |
| 58 | #define HAVE_NETDEV_PRIV /* netdev_priv() */ |
| 59 | |
| 60 | #define NET_XMIT_SUCCESS 0 |
| 61 | #define NET_XMIT_DROP 1 /* skb dropped */ |
| 62 | #define NET_XMIT_CN 2 /* congestion notification */ |
| 63 | #define NET_XMIT_POLICED 3 /* skb is shot by police */ |
| 64 | #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; |
| 65 | (TC use only - dev_queue_xmit |
| 66 | returns this as NET_XMIT_SUCCESS) */ |
| 67 | |
| 68 | /* Backlog congestion levels */ |
| 69 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
| 70 | #define NET_RX_DROP 1 /* packet dropped */ |
| 71 | #define NET_RX_CN_LOW 2 /* storm alert, just in case */ |
| 72 | #define NET_RX_CN_MOD 3 /* Storm on its way! */ |
| 73 | #define NET_RX_CN_HIGH 4 /* The storm is here */ |
| 74 | #define NET_RX_BAD 5 /* packet dropped due to kernel error */ |
| 75 | |
Gerrit Renker | b9df3cb | 2006-11-14 11:21:36 -0200 | [diff] [blame] | 76 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
| 77 | * indicates that the device will soon be dropping packets, or already drops |
| 78 | * some packets of the same priority; prompting us to send less aggressively. */ |
| 79 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
| 81 | |
| 82 | #endif |
| 83 | |
| 84 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ |
| 85 | |
| 86 | /* Driver transmit return codes */ |
| 87 | #define NETDEV_TX_OK 0 /* driver took care of packet */ |
| 88 | #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ |
| 89 | #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ |
| 90 | |
| 91 | /* |
| 92 | * Compute the worst case header length according to the protocols |
| 93 | * used. |
| 94 | */ |
| 95 | |
David S. Miller | 8388e3d | 2008-05-12 20:17:33 -0700 | [diff] [blame] | 96 | #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) |
| 97 | # if defined(CONFIG_MAC80211_MESH) |
| 98 | # define LL_MAX_HEADER 128 |
| 99 | # else |
| 100 | # define LL_MAX_HEADER 96 |
| 101 | # endif |
| 102 | #elif defined(CONFIG_TR) |
| 103 | # define LL_MAX_HEADER 48 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | #else |
David S. Miller | 8388e3d | 2008-05-12 20:17:33 -0700 | [diff] [blame] | 105 | # define LL_MAX_HEADER 32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #endif |
| 107 | |
David S. Miller | e81c735 | 2006-11-28 20:53:39 -0800 | [diff] [blame] | 108 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ |
| 109 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ |
| 110 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ |
| 111 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | #define MAX_HEADER LL_MAX_HEADER |
| 113 | #else |
| 114 | #define MAX_HEADER (LL_MAX_HEADER + 48) |
| 115 | #endif |
| 116 | |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 117 | struct net_device_subqueue |
| 118 | { |
| 119 | /* Give a control state for each queue. This struct may contain |
| 120 | * per-queue locks in the future. |
| 121 | */ |
| 122 | unsigned long state; |
| 123 | }; |
| 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | /* |
| 126 | * Network device statistics. Akin to the 2.0 ether stats but |
| 127 | * with byte counters. |
| 128 | */ |
| 129 | |
| 130 | struct net_device_stats |
| 131 | { |
| 132 | unsigned long rx_packets; /* total packets received */ |
| 133 | unsigned long tx_packets; /* total packets transmitted */ |
| 134 | unsigned long rx_bytes; /* total bytes received */ |
| 135 | unsigned long tx_bytes; /* total bytes transmitted */ |
| 136 | unsigned long rx_errors; /* bad packets received */ |
| 137 | unsigned long tx_errors; /* packet transmit problems */ |
| 138 | unsigned long rx_dropped; /* no space in linux buffers */ |
| 139 | unsigned long tx_dropped; /* no space available in linux */ |
| 140 | unsigned long multicast; /* multicast packets received */ |
| 141 | unsigned long collisions; |
| 142 | |
| 143 | /* detailed rx_errors: */ |
| 144 | unsigned long rx_length_errors; |
| 145 | unsigned long rx_over_errors; /* receiver ring buff overflow */ |
| 146 | unsigned long rx_crc_errors; /* recved pkt with crc error */ |
| 147 | unsigned long rx_frame_errors; /* recv'd frame alignment error */ |
| 148 | unsigned long rx_fifo_errors; /* recv'r fifo overrun */ |
| 149 | unsigned long rx_missed_errors; /* receiver missed packet */ |
| 150 | |
| 151 | /* detailed tx_errors */ |
| 152 | unsigned long tx_aborted_errors; |
| 153 | unsigned long tx_carrier_errors; |
| 154 | unsigned long tx_fifo_errors; |
| 155 | unsigned long tx_heartbeat_errors; |
| 156 | unsigned long tx_window_errors; |
| 157 | |
| 158 | /* for cslip etc */ |
| 159 | unsigned long rx_compressed; |
| 160 | unsigned long tx_compressed; |
| 161 | }; |
| 162 | |
| 163 | |
| 164 | /* Media selection options. */ |
| 165 | enum { |
| 166 | IF_PORT_UNKNOWN = 0, |
| 167 | IF_PORT_10BASE2, |
| 168 | IF_PORT_10BASET, |
| 169 | IF_PORT_AUI, |
| 170 | IF_PORT_100BASET, |
| 171 | IF_PORT_100BASETX, |
| 172 | IF_PORT_100BASEFX |
| 173 | }; |
| 174 | |
| 175 | #ifdef __KERNEL__ |
| 176 | |
| 177 | #include <linux/cache.h> |
| 178 | #include <linux/skbuff.h> |
| 179 | |
| 180 | struct neighbour; |
| 181 | struct neigh_parms; |
| 182 | struct sk_buff; |
| 183 | |
| 184 | struct netif_rx_stats |
| 185 | { |
| 186 | unsigned total; |
| 187 | unsigned dropped; |
| 188 | unsigned time_squeeze; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | unsigned cpu_collision; |
| 190 | }; |
| 191 | |
| 192 | DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); |
| 193 | |
Patrick McHardy | bf74248 | 2007-06-27 01:26:19 -0700 | [diff] [blame] | 194 | struct dev_addr_list |
| 195 | { |
| 196 | struct dev_addr_list *next; |
| 197 | u8 da_addr[MAX_ADDR_LEN]; |
| 198 | u8 da_addrlen; |
Patrick McHardy | a0a400d | 2007-07-14 18:52:02 -0700 | [diff] [blame] | 199 | u8 da_synced; |
Patrick McHardy | bf74248 | 2007-06-27 01:26:19 -0700 | [diff] [blame] | 200 | int da_users; |
| 201 | int da_gusers; |
| 202 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
| 204 | /* |
| 205 | * We tag multicasts with these structures. |
| 206 | */ |
Patrick McHardy | 3fba5a8 | 2007-06-27 01:26:58 -0700 | [diff] [blame] | 207 | |
| 208 | #define dev_mc_list dev_addr_list |
| 209 | #define dmi_addr da_addr |
| 210 | #define dmi_addrlen da_addrlen |
| 211 | #define dmi_users da_users |
| 212 | #define dmi_gusers da_gusers |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | struct hh_cache |
| 215 | { |
| 216 | struct hh_cache *hh_next; /* Next entry */ |
| 217 | atomic_t hh_refcnt; /* number of users */ |
Eric Dumazet | f049098 | 2006-12-08 00:08:43 -0800 | [diff] [blame] | 218 | /* |
| 219 | * We want hh_output, hh_len, hh_lock and hh_data be a in a separate |
| 220 | * cache line on SMP. |
| 221 | * They are mostly read, but hh_refcnt may be changed quite frequently, |
| 222 | * incurring cache line ping pongs. |
| 223 | */ |
| 224 | __be16 hh_type ____cacheline_aligned_in_smp; |
| 225 | /* protocol identifier, f.e ETH_P_IP |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | * NOTE: For VLANs, this will be the |
| 227 | * encapuslated type. --BLG |
| 228 | */ |
Arnaldo Carvalho de Melo | d5c42c0 | 2006-11-27 17:58:02 -0200 | [diff] [blame] | 229 | u16 hh_len; /* length of header */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | int (*hh_output)(struct sk_buff *skb); |
Stephen Hemminger | 3644f0c | 2006-12-07 15:08:17 -0800 | [diff] [blame] | 231 | seqlock_t hh_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
| 233 | /* cached hardware header; allow for machine alignment needs. */ |
| 234 | #define HH_DATA_MOD 16 |
| 235 | #define HH_DATA_OFF(__len) \ |
Jiri Benc | 5ba0eac | 2005-06-02 16:48:05 -0700 | [diff] [blame] | 236 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | #define HH_DATA_ALIGN(__len) \ |
| 238 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
| 239 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
| 240 | }; |
| 241 | |
| 242 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. |
| 243 | * Alternative is: |
| 244 | * dev->hard_header_len ? (dev->hard_header_len + |
| 245 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
| 246 | * |
| 247 | * We could use other alignment values, but we must maintain the |
| 248 | * relationship HH alignment <= LL alignment. |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 249 | * |
| 250 | * LL_ALLOCATED_SPACE also takes into account the tailroom the device |
| 251 | * may need. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | */ |
| 253 | #define LL_RESERVED_SPACE(dev) \ |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 254 | ((((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] | 255 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 256 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| 257 | #define LL_ALLOCATED_SPACE(dev) \ |
| 258 | ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 260 | struct header_ops { |
| 261 | int (*create) (struct sk_buff *skb, struct net_device *dev, |
| 262 | unsigned short type, const void *daddr, |
| 263 | const void *saddr, unsigned len); |
| 264 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
| 265 | int (*rebuild)(struct sk_buff *skb); |
| 266 | #define HAVE_HEADER_CACHE |
| 267 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); |
| 268 | void (*cache_update)(struct hh_cache *hh, |
| 269 | const struct net_device *dev, |
| 270 | const unsigned char *haddr); |
| 271 | }; |
| 272 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | /* These flag bits are private to the generic network queueing |
| 274 | * layer, they may not be explicitly referenced by any other |
| 275 | * code. |
| 276 | */ |
| 277 | |
| 278 | enum netdev_state_t |
| 279 | { |
| 280 | __LINK_STATE_XOFF=0, |
| 281 | __LINK_STATE_START, |
| 282 | __LINK_STATE_PRESENT, |
| 283 | __LINK_STATE_SCHED, |
| 284 | __LINK_STATE_NOCARRIER, |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 285 | __LINK_STATE_LINKWATCH_PENDING, |
| 286 | __LINK_STATE_DORMANT, |
Herbert Xu | 48d8332 | 2006-06-19 23:57:59 -0700 | [diff] [blame] | 287 | __LINK_STATE_QDISC_RUNNING, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | }; |
| 289 | |
| 290 | |
| 291 | /* |
| 292 | * This structure holds at boot time configured netdevice settings. They |
| 293 | * are then used in the device probing. |
| 294 | */ |
| 295 | struct netdev_boot_setup { |
| 296 | char name[IFNAMSIZ]; |
| 297 | struct ifmap map; |
| 298 | }; |
| 299 | #define NETDEV_BOOT_SETUP_MAX 8 |
| 300 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 301 | extern int __init netdev_boot_setup(char *str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | /* |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 304 | * Structure for NAPI scheduling similar to tasklet but with weighting |
| 305 | */ |
| 306 | struct napi_struct { |
| 307 | /* The poll_list must only be managed by the entity which |
| 308 | * changes the state of the NAPI_STATE_SCHED bit. This means |
| 309 | * whoever atomically sets that bit can add this napi_struct |
| 310 | * to the per-cpu poll_list, and whoever clears that bit |
| 311 | * can remove from the list right before clearing the bit. |
| 312 | */ |
| 313 | struct list_head poll_list; |
| 314 | |
| 315 | unsigned long state; |
| 316 | int weight; |
| 317 | int (*poll)(struct napi_struct *, int); |
| 318 | #ifdef CONFIG_NETPOLL |
| 319 | spinlock_t poll_lock; |
| 320 | int poll_owner; |
| 321 | struct net_device *dev; |
| 322 | struct list_head dev_list; |
| 323 | #endif |
| 324 | }; |
| 325 | |
| 326 | enum |
| 327 | { |
| 328 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 329 | NAPI_STATE_DISABLE, /* Disable pending */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 330 | }; |
| 331 | |
Harvey Harrison | b3c9752 | 2008-02-13 15:03:15 -0800 | [diff] [blame] | 332 | extern void __napi_schedule(struct napi_struct *n); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 333 | |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 334 | static inline int napi_disable_pending(struct napi_struct *n) |
| 335 | { |
| 336 | return test_bit(NAPI_STATE_DISABLE, &n->state); |
| 337 | } |
| 338 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 339 | /** |
| 340 | * napi_schedule_prep - check if napi can be scheduled |
| 341 | * @n: napi context |
| 342 | * |
| 343 | * Test if NAPI routine is already running, and if not mark |
| 344 | * it as running. This is used as a condition variable |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 345 | * insure only one NAPI poll instance runs. We also make |
| 346 | * sure there is no pending NAPI disable. |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 347 | */ |
| 348 | static inline int napi_schedule_prep(struct napi_struct *n) |
| 349 | { |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 350 | return !napi_disable_pending(n) && |
| 351 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | /** |
| 355 | * napi_schedule - schedule NAPI poll |
| 356 | * @n: napi context |
| 357 | * |
| 358 | * Schedule NAPI poll routine to be called if it is not already |
| 359 | * running. |
| 360 | */ |
| 361 | static inline void napi_schedule(struct napi_struct *n) |
| 362 | { |
| 363 | if (napi_schedule_prep(n)) |
| 364 | __napi_schedule(n); |
| 365 | } |
| 366 | |
Roland Dreier | bfe13f5 | 2007-10-09 15:47:37 -0700 | [diff] [blame] | 367 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
| 368 | static inline int napi_reschedule(struct napi_struct *napi) |
| 369 | { |
| 370 | if (napi_schedule_prep(napi)) { |
| 371 | __napi_schedule(napi); |
| 372 | return 1; |
| 373 | } |
| 374 | return 0; |
| 375 | } |
| 376 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 377 | /** |
| 378 | * napi_complete - NAPI processing complete |
| 379 | * @n: napi context |
| 380 | * |
| 381 | * Mark NAPI processing as complete. |
| 382 | */ |
| 383 | static inline void __napi_complete(struct napi_struct *n) |
| 384 | { |
| 385 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); |
| 386 | list_del(&n->poll_list); |
| 387 | smp_mb__before_clear_bit(); |
| 388 | clear_bit(NAPI_STATE_SCHED, &n->state); |
| 389 | } |
| 390 | |
| 391 | static inline void napi_complete(struct napi_struct *n) |
| 392 | { |
David S. Miller | 50fd440 | 2008-03-27 17:42:50 -0700 | [diff] [blame] | 393 | unsigned long flags; |
| 394 | |
| 395 | local_irq_save(flags); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 396 | __napi_complete(n); |
David S. Miller | 50fd440 | 2008-03-27 17:42:50 -0700 | [diff] [blame] | 397 | local_irq_restore(flags); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | /** |
| 401 | * napi_disable - prevent NAPI from scheduling |
| 402 | * @n: napi context |
| 403 | * |
| 404 | * Stop NAPI from being scheduled on this context. |
| 405 | * Waits till any outstanding processing completes. |
| 406 | */ |
| 407 | static inline void napi_disable(struct napi_struct *n) |
| 408 | { |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 409 | set_bit(NAPI_STATE_DISABLE, &n->state); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 410 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
Benjamin Herrenschmidt | 43cc738 | 2007-10-26 04:23:22 -0700 | [diff] [blame] | 411 | msleep(1); |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 412 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | /** |
| 416 | * napi_enable - enable NAPI scheduling |
| 417 | * @n: napi context |
| 418 | * |
| 419 | * Resume NAPI from being scheduled on this context. |
| 420 | * Must be paired with napi_disable. |
| 421 | */ |
| 422 | static inline void napi_enable(struct napi_struct *n) |
| 423 | { |
| 424 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); |
| 425 | smp_mb__before_clear_bit(); |
| 426 | clear_bit(NAPI_STATE_SCHED, &n->state); |
| 427 | } |
| 428 | |
Stephen Hemminger | c264c3d | 2007-10-17 13:26:41 -0700 | [diff] [blame] | 429 | #ifdef CONFIG_SMP |
| 430 | /** |
| 431 | * napi_synchronize - wait until NAPI is not running |
| 432 | * @n: napi context |
| 433 | * |
| 434 | * Wait until NAPI is done being scheduled on this context. |
| 435 | * Waits till any outstanding processing completes but |
| 436 | * does not disable future activations. |
| 437 | */ |
| 438 | static inline void napi_synchronize(const struct napi_struct *n) |
| 439 | { |
| 440 | while (test_bit(NAPI_STATE_SCHED, &n->state)) |
| 441 | msleep(1); |
| 442 | } |
| 443 | #else |
| 444 | # define napi_synchronize(n) barrier() |
| 445 | #endif |
| 446 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 447 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | * The DEVICE structure. |
| 449 | * Actually, this whole structure is a big mistake. It mixes I/O |
| 450 | * data with strictly "high-level" data, and it has to know about |
| 451 | * almost every data structure used in the INET module. |
| 452 | * |
| 453 | * FIXME: cleanup struct net_device such that network protocol info |
| 454 | * moves out. |
| 455 | */ |
| 456 | |
| 457 | struct net_device |
| 458 | { |
| 459 | |
| 460 | /* |
| 461 | * This is the first field of the "visible" part of this structure |
| 462 | * (i.e. as seen by users in the "Space.c" file). It is the name |
| 463 | * the interface. |
| 464 | */ |
| 465 | char name[IFNAMSIZ]; |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 466 | /* device name hash chain */ |
| 467 | struct hlist_node name_hlist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
| 469 | /* |
| 470 | * I/O specific fields |
| 471 | * FIXME: Merge these and struct ifmap into one |
| 472 | */ |
| 473 | unsigned long mem_end; /* shared mem end */ |
| 474 | unsigned long mem_start; /* shared mem start */ |
| 475 | unsigned long base_addr; /* device I/O address */ |
| 476 | unsigned int irq; /* device IRQ number */ |
| 477 | |
| 478 | /* |
| 479 | * Some hardware also needs these fields, but they are not |
| 480 | * part of the usual set specified in Space.c. |
| 481 | */ |
| 482 | |
| 483 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
| 484 | unsigned char dma; /* DMA channel */ |
| 485 | |
| 486 | unsigned long state; |
| 487 | |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 488 | struct list_head dev_list; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 489 | #ifdef CONFIG_NETPOLL |
| 490 | struct list_head napi_list; |
| 491 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
| 493 | /* The device initialization function. Called only once. */ |
| 494 | int (*init)(struct net_device *dev); |
| 495 | |
| 496 | /* ------- Fields preinitialized in Space.c finish here ------- */ |
| 497 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 498 | /* Net device features */ |
| 499 | unsigned long features; |
| 500 | #define NETIF_F_SG 1 /* Scatter/gather IO. */ |
Stephen Hemminger | d212f87 | 2007-06-27 00:47:37 -0700 | [diff] [blame] | 501 | #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 502 | #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
| 503 | #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ |
Stephen Hemminger | d212f87 | 2007-06-27 00:47:37 -0700 | [diff] [blame] | 504 | #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 505 | #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
| 506 | #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ |
| 507 | #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ |
| 508 | #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ |
| 509 | #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ |
| 510 | #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ |
Herbert Xu | 37c3185 | 2006-06-22 03:07:29 -0700 | [diff] [blame] | 511 | #define NETIF_F_GSO 2048 /* Enable software GSO. */ |
Christian Borntraeger | e24eb52 | 2007-09-25 19:42:02 -0700 | [diff] [blame] | 512 | #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ |
| 513 | /* do not use LLTX in new drivers */ |
Eric W. Biederman | ce286d3 | 2007-09-12 13:53:49 +0200 | [diff] [blame] | 514 | #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 515 | #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ |
Jeff Garzik | 3ae7c0b | 2007-08-15 16:00:51 -0700 | [diff] [blame] | 516 | #define NETIF_F_LRO 32768 /* large receive offload */ |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame] | 517 | |
| 518 | /* Segmentation offload features */ |
Patrick McHardy | 289c79a | 2008-05-23 00:22:04 -0700 | [diff] [blame] | 519 | #define NETIF_F_GSO_SHIFT 16 |
| 520 | #define NETIF_F_GSO_MASK 0xffff0000 |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame] | 521 | #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
Herbert Xu | f83ef8c | 2006-06-30 13:37:03 -0700 | [diff] [blame] | 522 | #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 523 | #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) |
Herbert Xu | f83ef8c | 2006-06-30 13:37:03 -0700 | [diff] [blame] | 524 | #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) |
| 525 | #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 526 | |
Herbert Xu | 78eb887 | 2006-08-17 18:22:32 -0700 | [diff] [blame] | 527 | /* List of features with software fallbacks. */ |
| 528 | #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) |
| 529 | |
Stephen Hemminger | d212f87 | 2007-06-27 00:47:37 -0700 | [diff] [blame] | 530 | |
Herbert Xu | 8648b30 | 2006-06-17 22:06:05 -0700 | [diff] [blame] | 531 | #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
Stephen Hemminger | d212f87 | 2007-06-27 00:47:37 -0700 | [diff] [blame] | 532 | #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) |
| 533 | #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) |
| 534 | #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) |
Herbert Xu | 8648b30 | 2006-06-17 22:06:05 -0700 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | struct net_device *next_sched; |
| 537 | |
| 538 | /* Interface index. Unique device identifier */ |
| 539 | int ifindex; |
| 540 | int iflink; |
| 541 | |
| 542 | |
| 543 | struct net_device_stats* (*get_stats)(struct net_device *dev); |
Rusty Russell | c45d286 | 2007-03-28 14:29:08 -0700 | [diff] [blame] | 544 | struct net_device_stats stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | |
Johannes Berg | b86e028 | 2007-04-26 20:48:23 -0700 | [diff] [blame] | 546 | #ifdef CONFIG_WIRELESS_EXT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
| 548 | * See <net/iw_handler.h> for details. Jean II */ |
| 549 | const struct iw_handler_def * wireless_handlers; |
| 550 | /* Instance data managed by the core of Wireless Extensions. */ |
| 551 | struct iw_public_data * wireless_data; |
Johannes Berg | b86e028 | 2007-04-26 20:48:23 -0700 | [diff] [blame] | 552 | #endif |
Stephen Hemminger | 76fd859 | 2006-09-08 11:16:13 -0700 | [diff] [blame] | 553 | const struct ethtool_ops *ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 555 | /* Hardware header description */ |
| 556 | const struct header_ops *header_ops; |
| 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | /* |
| 559 | * This marks the end of the "visible" part of the structure. All |
| 560 | * fields hereafter are internal to the system, and may change at |
| 561 | * will (read: may be cleaned up at will). |
| 562 | */ |
| 563 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 565 | unsigned int flags; /* interface flags (a la BSD) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | unsigned short gflags; |
| 567 | unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ |
| 568 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
| 569 | |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 570 | unsigned char operstate; /* RFC2863 operstate */ |
| 571 | unsigned char link_mode; /* mapping policy to operstate */ |
| 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | unsigned mtu; /* interface MTU value */ |
| 574 | unsigned short type; /* interface hardware type */ |
| 575 | unsigned short hard_header_len; /* hardware hdr length */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Johannes Berg | f5184d2 | 2008-05-12 20:48:31 -0700 | [diff] [blame] | 577 | /* extra head- and tailroom the hardware may need, but not in all cases |
| 578 | * can this be guaranteed, especially tailroom. Some cases also use |
| 579 | * LL_MAX_HEADER instead to allocate the skb. |
| 580 | */ |
| 581 | unsigned short needed_headroom; |
| 582 | unsigned short needed_tailroom; |
| 583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | struct net_device *master; /* Pointer to master device of a group, |
| 585 | * which this device is member of. |
| 586 | */ |
| 587 | |
| 588 | /* Interface address info. */ |
Jon Wetzel | a6f9a70 | 2005-08-20 17:15:54 -0700 | [diff] [blame] | 589 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | unsigned char addr_len; /* hardware address length */ |
| 591 | unsigned short dev_id; /* for shared network cards */ |
| 592 | |
Patrick McHardy | 4417da6 | 2007-06-27 01:28:10 -0700 | [diff] [blame] | 593 | struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ |
| 594 | int uc_count; /* Number of installed ucasts */ |
| 595 | int uc_promisc; |
Patrick McHardy | 3fba5a8 | 2007-06-27 01:26:58 -0700 | [diff] [blame] | 596 | struct dev_addr_list *mc_list; /* Multicast mac addresses */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | int mc_count; /* Number of installed mcasts */ |
Wang Chen | 9d45abe | 2008-06-17 21:12:48 -0700 | [diff] [blame^] | 598 | unsigned int promiscuity; |
| 599 | unsigned int allmulti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | |
| 602 | /* Protocol specific pointers */ |
| 603 | |
| 604 | void *atalk_ptr; /* AppleTalk link */ |
| 605 | void *ip_ptr; /* IPv4 specific data */ |
| 606 | void *dn_ptr; /* DECnet specific data */ |
| 607 | void *ip6_ptr; /* IPv6 specific data */ |
| 608 | void *ec_ptr; /* Econet specific data */ |
| 609 | void *ax25_ptr; /* AX.25 specific data */ |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 610 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
| 611 | assign before registering */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 613 | /* |
| 614 | * Cache line mostly used on receive path (including eth_type_trans()) |
| 615 | */ |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 616 | unsigned long last_rx; /* Time of last Rx */ |
| 617 | /* Interface address info used in eth_type_trans() */ |
| 618 | unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast |
| 619 | because most packets are unicast) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 621 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
| 622 | |
Neil Turton | d5bd014 | 2008-02-12 23:13:48 -0800 | [diff] [blame] | 623 | /* ingress path synchronizer */ |
| 624 | spinlock_t ingress_lock; |
| 625 | struct Qdisc *qdisc_ingress; |
| 626 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 627 | /* |
| 628 | * Cache line mostly used on queue transmit path (qdisc) |
| 629 | */ |
| 630 | /* device queue lock */ |
| 631 | spinlock_t queue_lock ____cacheline_aligned_in_smp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | struct Qdisc *qdisc; |
| 633 | struct Qdisc *qdisc_sleeping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | struct list_head qdisc_list; |
| 635 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
| 636 | |
Herbert Xu | f6a78bf | 2006-06-22 02:57:17 -0700 | [diff] [blame] | 637 | /* Partially transmitted GSO packet. */ |
| 638 | struct sk_buff *gso_skb; |
| 639 | |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 640 | /* |
| 641 | * One part is mostly used on xmit path (device) |
| 642 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | /* hard_start_xmit synchronizer */ |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 644 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | /* cpu id of processor entered to hard_start_xmit or -1, |
| 646 | if nobody entered there. |
| 647 | */ |
| 648 | int xmit_lock_owner; |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 649 | void *priv; /* pointer to private data */ |
| 650 | int (*hard_start_xmit) (struct sk_buff *skb, |
| 651 | struct net_device *dev); |
| 652 | /* These may be needed for future network-power-down code. */ |
| 653 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
| 654 | |
| 655 | int watchdog_timeo; /* used by dev_watchdog() */ |
| 656 | struct timer_list watchdog_timer; |
| 657 | |
| 658 | /* |
| 659 | * refcnt is a very hot point, so align it on SMP |
| 660 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | /* Number of references to this device */ |
Eric Dumazet | 9356b8f | 2005-09-27 15:23:16 -0700 | [diff] [blame] | 662 | atomic_t refcnt ____cacheline_aligned_in_smp; |
| 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | /* delayed register/unregister */ |
| 665 | struct list_head todo_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | /* device index hash chain */ |
| 667 | struct hlist_node index_hlist; |
| 668 | |
Herbert Xu | 572a103 | 2007-05-08 18:34:17 -0700 | [diff] [blame] | 669 | struct net_device *link_watch_next; |
| 670 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | /* register/unregister state machine */ |
| 672 | enum { NETREG_UNINITIALIZED=0, |
Stephen Hemminger | b17a7c1 | 2006-05-10 13:21:17 -0700 | [diff] [blame] | 673 | NETREG_REGISTERED, /* completed register_netdevice */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
| 675 | NETREG_UNREGISTERED, /* completed unregister todo */ |
| 676 | NETREG_RELEASED, /* called free_netdev */ |
| 677 | } reg_state; |
| 678 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | /* Called after device is detached from network. */ |
| 680 | void (*uninit)(struct net_device *dev); |
| 681 | /* Called after last user reference disappears. */ |
| 682 | void (*destructor)(struct net_device *dev); |
| 683 | |
| 684 | /* Pointers to interface service routines. */ |
| 685 | int (*open)(struct net_device *dev); |
| 686 | int (*stop)(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | #define HAVE_NETDEV_POLL |
Patrick McHardy | 2402345 | 2007-07-14 18:51:31 -0700 | [diff] [blame] | 688 | #define HAVE_CHANGE_RX_FLAGS |
| 689 | void (*change_rx_flags)(struct net_device *dev, |
| 690 | int flags); |
Patrick McHardy | 4417da6 | 2007-06-27 01:28:10 -0700 | [diff] [blame] | 691 | #define HAVE_SET_RX_MODE |
| 692 | void (*set_rx_mode)(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | #define HAVE_MULTICAST |
| 694 | void (*set_multicast_list)(struct net_device *dev); |
| 695 | #define HAVE_SET_MAC_ADDR |
| 696 | int (*set_mac_address)(struct net_device *dev, |
| 697 | void *addr); |
Jeff Garzik | bada339 | 2007-10-23 20:19:37 -0700 | [diff] [blame] | 698 | #define HAVE_VALIDATE_ADDR |
| 699 | int (*validate_addr)(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | #define HAVE_PRIVATE_IOCTL |
| 701 | int (*do_ioctl)(struct net_device *dev, |
| 702 | struct ifreq *ifr, int cmd); |
| 703 | #define HAVE_SET_CONFIG |
| 704 | int (*set_config)(struct net_device *dev, |
| 705 | struct ifmap *map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | #define HAVE_CHANGE_MTU |
| 707 | int (*change_mtu)(struct net_device *dev, int new_mtu); |
| 708 | |
| 709 | #define HAVE_TX_TIMEOUT |
| 710 | void (*tx_timeout) (struct net_device *dev); |
| 711 | |
| 712 | void (*vlan_rx_register)(struct net_device *dev, |
| 713 | struct vlan_group *grp); |
| 714 | void (*vlan_rx_add_vid)(struct net_device *dev, |
| 715 | unsigned short vid); |
| 716 | void (*vlan_rx_kill_vid)(struct net_device *dev, |
| 717 | unsigned short vid); |
| 718 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); |
| 720 | #ifdef CONFIG_NETPOLL |
Jeff Moyer | 115c1d6 | 2005-06-22 22:05:31 -0700 | [diff] [blame] | 721 | struct netpoll_info *npinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | #endif |
| 723 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 724 | void (*poll_controller)(struct net_device *dev); |
| 725 | #endif |
| 726 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 727 | #ifdef CONFIG_NET_NS |
Eric W. Biederman | 4a1c537 | 2007-09-12 11:56:32 +0200 | [diff] [blame] | 728 | /* Network namespace this network device is inside */ |
| 729 | struct net *nd_net; |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 730 | #endif |
Eric W. Biederman | 4a1c537 | 2007-09-12 11:56:32 +0200 | [diff] [blame] | 731 | |
David S. Miller | 4951704 | 2008-05-12 03:29:11 -0700 | [diff] [blame] | 732 | /* mid-layer private */ |
| 733 | void *ml_priv; |
| 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | /* bridge stuff */ |
| 736 | struct net_bridge_port *br_port; |
Patrick McHardy | b863ceb | 2007-07-14 18:55:06 -0700 | [diff] [blame] | 737 | /* macvlan */ |
| 738 | struct macvlan_port *macvlan_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | /* class/net/name entry */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 741 | struct device dev; |
Stephen Hemminger | fe9925b | 2006-05-06 17:56:03 -0700 | [diff] [blame] | 742 | /* space for optional statistics and wireless sysfs groups */ |
| 743 | struct attribute_group *sysfs_groups[3]; |
Patrick McHardy | 38f7b87 | 2007-06-13 12:03:51 -0700 | [diff] [blame] | 744 | |
| 745 | /* rtnetlink link ops */ |
| 746 | const struct rtnl_link_ops *rtnl_link_ops; |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 747 | |
Patrick McHardy | 289c79a | 2008-05-23 00:22:04 -0700 | [diff] [blame] | 748 | /* VLAN feature mask */ |
| 749 | unsigned long vlan_features; |
| 750 | |
Peter P Waskiewicz Jr | 82cc1a7 | 2008-03-21 03:43:19 -0700 | [diff] [blame] | 751 | /* for setting kernel sock attribute on TCP connection setup */ |
| 752 | #define GSO_MAX_SIZE 65536 |
| 753 | unsigned int gso_max_size; |
| 754 | |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 755 | /* The TX queue control structures */ |
| 756 | unsigned int egress_subqueue_count; |
Patrick McHardy | 31ce72a | 2007-07-20 19:45:45 -0700 | [diff] [blame] | 757 | struct net_device_subqueue egress_subqueue[1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | }; |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 759 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | |
| 761 | #define NETDEV_ALIGN 32 |
| 762 | #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) |
| 763 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 764 | /* |
| 765 | * Net namespace inlines |
| 766 | */ |
| 767 | static inline |
| 768 | struct net *dev_net(const struct net_device *dev) |
| 769 | { |
| 770 | #ifdef CONFIG_NET_NS |
| 771 | return dev->nd_net; |
| 772 | #else |
| 773 | return &init_net; |
| 774 | #endif |
| 775 | } |
| 776 | |
| 777 | static inline |
Denis V. Lunev | f5aa23f | 2008-03-26 00:48:17 -0700 | [diff] [blame] | 778 | void dev_net_set(struct net_device *dev, struct net *net) |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 779 | { |
| 780 | #ifdef CONFIG_NET_NS |
Denis V. Lunev | f3005d7 | 2008-04-16 02:02:18 -0700 | [diff] [blame] | 781 | release_net(dev->nd_net); |
| 782 | dev->nd_net = hold_net(net); |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 783 | #endif |
| 784 | } |
| 785 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 786 | /** |
| 787 | * netdev_priv - access network device private data |
| 788 | * @dev: network device |
| 789 | * |
| 790 | * Get network device private data |
| 791 | */ |
Patrick McHardy | 6472ce6 | 2007-06-13 12:03:21 -0700 | [diff] [blame] | 792 | static inline void *netdev_priv(const struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | { |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 794 | return dev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | } |
| 796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | /* Set the sysfs physical device reference for the network logical device |
| 798 | * if set prior to registration will cause a symlink during initialization. |
| 799 | */ |
Greg Kroah-Hartman | 43cb76d | 2002-04-09 12:14:34 -0700 | [diff] [blame] | 800 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
Stephen Hemminger | 3b582cc | 2007-11-01 02:21:47 -0700 | [diff] [blame] | 802 | /** |
| 803 | * netif_napi_add - initialize a napi context |
| 804 | * @dev: network device |
| 805 | * @napi: napi context |
| 806 | * @poll: polling function |
| 807 | * @weight: default weight |
| 808 | * |
| 809 | * netif_napi_add() must be used to initialize a napi context prior to calling |
| 810 | * *any* of the other napi related functions. |
| 811 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 812 | static inline void netif_napi_add(struct net_device *dev, |
| 813 | struct napi_struct *napi, |
| 814 | int (*poll)(struct napi_struct *, int), |
| 815 | int weight) |
| 816 | { |
| 817 | INIT_LIST_HEAD(&napi->poll_list); |
| 818 | napi->poll = poll; |
| 819 | napi->weight = weight; |
| 820 | #ifdef CONFIG_NETPOLL |
| 821 | napi->dev = dev; |
| 822 | list_add(&napi->dev_list, &dev->napi_list); |
| 823 | spin_lock_init(&napi->poll_lock); |
| 824 | napi->poll_owner = -1; |
| 825 | #endif |
| 826 | set_bit(NAPI_STATE_SCHED, &napi->state); |
| 827 | } |
| 828 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | struct packet_type { |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 830 | __be16 type; /* This is really htons(ether_type). */ |
| 831 | struct net_device *dev; /* NULL is wildcarded here */ |
| 832 | int (*func) (struct sk_buff *, |
| 833 | struct net_device *, |
| 834 | struct packet_type *, |
| 835 | struct net_device *); |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 836 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
| 837 | int features); |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 838 | int (*gso_send_check)(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | void *af_packet_priv; |
| 840 | struct list_head list; |
| 841 | }; |
| 842 | |
| 843 | #include <linux/interrupt.h> |
| 844 | #include <linux/notifier.h> |
| 845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | extern rwlock_t dev_base_lock; /* Device list lock */ |
| 847 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 848 | |
| 849 | #define for_each_netdev(net, d) \ |
| 850 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) |
| 851 | #define for_each_netdev_safe(net, d, n) \ |
| 852 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) |
| 853 | #define for_each_netdev_continue(net, d) \ |
| 854 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 855 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
| 856 | |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 857 | static inline struct net_device *next_net_device(struct net_device *dev) |
| 858 | { |
| 859 | struct list_head *lh; |
| 860 | struct net *net; |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 861 | |
YOSHIFUJI Hideaki | c346dca | 2008-03-25 21:47:49 +0900 | [diff] [blame] | 862 | net = dev_net(dev); |
Daniel Lezcano | a050c33 | 2007-09-12 14:57:09 +0200 | [diff] [blame] | 863 | lh = dev->dev_list.next; |
| 864 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
| 865 | } |
| 866 | |
| 867 | static inline struct net_device *first_net_device(struct net *net) |
| 868 | { |
| 869 | return list_empty(&net->dev_base_head) ? NULL : |
| 870 | net_device_entry(net->dev_base_head.next); |
| 871 | } |
Pavel Emelianov | 7562f87 | 2007-05-03 15:13:45 -0700 | [diff] [blame] | 872 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | extern int netdev_boot_setup_check(struct net_device *dev); |
| 874 | extern unsigned long netdev_boot_base(const char *prefix, int unit); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 875 | extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); |
| 876 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
| 877 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | extern void dev_add_pack(struct packet_type *pt); |
| 879 | extern void dev_remove_pack(struct packet_type *pt); |
| 880 | extern void __dev_remove_pack(struct packet_type *pt); |
| 881 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 882 | extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | unsigned short mask); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 884 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
| 885 | 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] | 886 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
| 887 | extern int dev_open(struct net_device *dev); |
| 888 | extern int dev_close(struct net_device *dev); |
| 889 | extern int dev_queue_xmit(struct sk_buff *skb); |
| 890 | extern int register_netdevice(struct net_device *dev); |
Stephen Hemminger | 22f8cde | 2007-02-07 00:09:58 -0800 | [diff] [blame] | 891 | extern void unregister_netdevice(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | extern void free_netdev(struct net_device *dev); |
| 893 | extern void synchronize_net(void); |
| 894 | extern int register_netdevice_notifier(struct notifier_block *nb); |
| 895 | extern int unregister_netdevice_notifier(struct notifier_block *nb); |
Eric W. Biederman | ad7379d | 2007-09-16 15:33:32 -0700 | [diff] [blame] | 896 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 897 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
| 898 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | extern int dev_restart(struct net_device *dev); |
| 900 | #ifdef CONFIG_NETPOLL_TRAP |
| 901 | extern int netpoll_trap(void); |
| 902 | #endif |
| 903 | |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 904 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
| 905 | unsigned short type, |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 906 | const void *daddr, const void *saddr, |
| 907 | unsigned len) |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 908 | { |
Ursula Braun | f1ecfd5 | 2007-10-22 16:16:14 +0200 | [diff] [blame] | 909 | if (!dev->header_ops || !dev->header_ops->create) |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 910 | return 0; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 911 | |
| 912 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); |
Stephen Hemminger | 0c4e858 | 2007-10-09 01:36:32 -0700 | [diff] [blame] | 913 | } |
| 914 | |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 915 | static inline int dev_parse_header(const struct sk_buff *skb, |
| 916 | unsigned char *haddr) |
| 917 | { |
| 918 | const struct net_device *dev = skb->dev; |
| 919 | |
Patrick McHardy | 1b83336 | 2007-10-18 05:09:28 -0700 | [diff] [blame] | 920 | if (!dev->header_ops || !dev->header_ops->parse) |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 921 | return 0; |
Stephen Hemminger | 3b04ddd | 2007-10-09 01:40:57 -0700 | [diff] [blame] | 922 | return dev->header_ops->parse(skb, haddr); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 923 | } |
| 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
| 926 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); |
| 927 | static inline int unregister_gifconf(unsigned int family) |
| 928 | { |
| 929 | return register_gifconf(family, NULL); |
| 930 | } |
| 931 | |
| 932 | /* |
| 933 | * Incoming packets are placed on per-cpu queues so that |
| 934 | * no locking is needed. |
| 935 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | struct softnet_data |
| 937 | { |
Stephen Hemminger | 31aa02c | 2005-06-23 20:12:48 -0700 | [diff] [blame] | 938 | struct net_device *output_queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | struct sk_buff_head input_pkt_queue; |
| 940 | struct list_head poll_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | struct sk_buff *completion_queue; |
| 942 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 943 | struct napi_struct backlog; |
Chris Leech | db21733 | 2006-06-17 21:24:58 -0700 | [diff] [blame] | 944 | #ifdef CONFIG_NET_DMA |
| 945 | struct dma_chan *net_dma; |
| 946 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | }; |
| 948 | |
| 949 | DECLARE_PER_CPU(struct softnet_data,softnet_data); |
| 950 | |
| 951 | #define HAVE_NETIF_QUEUE |
| 952 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 953 | extern void __netif_schedule(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
| 955 | static inline void netif_schedule(struct net_device *dev) |
| 956 | { |
| 957 | if (!test_bit(__LINK_STATE_XOFF, &dev->state)) |
| 958 | __netif_schedule(dev); |
| 959 | } |
| 960 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 961 | /** |
| 962 | * netif_start_queue - allow transmit |
| 963 | * @dev: network device |
| 964 | * |
| 965 | * Allow upper layers to call the device hard_start_xmit routine. |
| 966 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | static inline void netif_start_queue(struct net_device *dev) |
| 968 | { |
| 969 | clear_bit(__LINK_STATE_XOFF, &dev->state); |
| 970 | } |
| 971 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 972 | /** |
| 973 | * netif_wake_queue - restart transmit |
| 974 | * @dev: network device |
| 975 | * |
| 976 | * Allow upper layers to call the device hard_start_xmit routine. |
| 977 | * Used for flow control when transmit resources are available. |
| 978 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | static inline void netif_wake_queue(struct net_device *dev) |
| 980 | { |
| 981 | #ifdef CONFIG_NETPOLL_TRAP |
Sergei Shtylyov | 5f286e1 | 2007-04-28 20:57:37 -0700 | [diff] [blame] | 982 | if (netpoll_trap()) { |
| 983 | clear_bit(__LINK_STATE_XOFF, &dev->state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | return; |
Sergei Shtylyov | 5f286e1 | 2007-04-28 20:57:37 -0700 | [diff] [blame] | 985 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | #endif |
| 987 | if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) |
| 988 | __netif_schedule(dev); |
| 989 | } |
| 990 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 991 | /** |
| 992 | * netif_stop_queue - stop transmitted packets |
| 993 | * @dev: network device |
| 994 | * |
| 995 | * Stop upper layers calling the device hard_start_xmit routine. |
| 996 | * Used for flow control when transmit resources are unavailable. |
| 997 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | static inline void netif_stop_queue(struct net_device *dev) |
| 999 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | set_bit(__LINK_STATE_XOFF, &dev->state); |
| 1001 | } |
| 1002 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1003 | /** |
| 1004 | * netif_queue_stopped - test if transmit queue is flowblocked |
| 1005 | * @dev: network device |
| 1006 | * |
| 1007 | * Test if transmit queue on device is currently unable to send. |
| 1008 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | static inline int netif_queue_stopped(const struct net_device *dev) |
| 1010 | { |
| 1011 | return test_bit(__LINK_STATE_XOFF, &dev->state); |
| 1012 | } |
| 1013 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1014 | /** |
| 1015 | * netif_running - test if up |
| 1016 | * @dev: network device |
| 1017 | * |
| 1018 | * Test if the device has been brought up. |
| 1019 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | static inline int netif_running(const struct net_device *dev) |
| 1021 | { |
| 1022 | return test_bit(__LINK_STATE_START, &dev->state); |
| 1023 | } |
| 1024 | |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1025 | /* |
| 1026 | * Routines to manage the subqueues on a device. We only need start |
| 1027 | * stop, and a check if it's stopped. All other device management is |
| 1028 | * done at the overall netdevice level. |
| 1029 | * Also test the device if we're multiqueue. |
| 1030 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1031 | |
| 1032 | /** |
| 1033 | * netif_start_subqueue - allow sending packets on subqueue |
| 1034 | * @dev: network device |
| 1035 | * @queue_index: sub queue index |
| 1036 | * |
| 1037 | * Start individual transmit queue of a device with multiple transmit queues. |
| 1038 | */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1039 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
| 1040 | { |
| 1041 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE |
| 1042 | clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); |
| 1043 | #endif |
| 1044 | } |
| 1045 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1046 | /** |
| 1047 | * netif_stop_subqueue - stop sending packets on subqueue |
| 1048 | * @dev: network device |
| 1049 | * @queue_index: sub queue index |
| 1050 | * |
| 1051 | * Stop individual transmit queue of a device with multiple transmit queues. |
| 1052 | */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1053 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
| 1054 | { |
| 1055 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE |
| 1056 | #ifdef CONFIG_NETPOLL_TRAP |
| 1057 | if (netpoll_trap()) |
| 1058 | return; |
| 1059 | #endif |
| 1060 | set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); |
| 1061 | #endif |
| 1062 | } |
| 1063 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1064 | /** |
| 1065 | * netif_subqueue_stopped - test status of subqueue |
| 1066 | * @dev: network device |
| 1067 | * @queue_index: sub queue index |
| 1068 | * |
| 1069 | * Check individual transmit queue of a device with multiple transmit queues. |
| 1070 | */ |
Pavel Emelyanov | 668f895 | 2007-10-21 17:01:56 -0700 | [diff] [blame] | 1071 | static inline int __netif_subqueue_stopped(const struct net_device *dev, |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1072 | u16 queue_index) |
| 1073 | { |
| 1074 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE |
| 1075 | return test_bit(__LINK_STATE_XOFF, |
| 1076 | &dev->egress_subqueue[queue_index].state); |
| 1077 | #else |
| 1078 | return 0; |
| 1079 | #endif |
| 1080 | } |
| 1081 | |
Pavel Emelyanov | 668f895 | 2007-10-21 17:01:56 -0700 | [diff] [blame] | 1082 | static inline int netif_subqueue_stopped(const struct net_device *dev, |
| 1083 | struct sk_buff *skb) |
| 1084 | { |
| 1085 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); |
| 1086 | } |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1087 | |
| 1088 | /** |
| 1089 | * netif_wake_subqueue - allow sending packets on subqueue |
| 1090 | * @dev: network device |
| 1091 | * @queue_index: sub queue index |
| 1092 | * |
| 1093 | * Resume individual transmit queue of a device with multiple transmit queues. |
| 1094 | */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1095 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
| 1096 | { |
| 1097 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE |
| 1098 | #ifdef CONFIG_NETPOLL_TRAP |
| 1099 | if (netpoll_trap()) |
| 1100 | return; |
| 1101 | #endif |
| 1102 | if (test_and_clear_bit(__LINK_STATE_XOFF, |
| 1103 | &dev->egress_subqueue[queue_index].state)) |
| 1104 | __netif_schedule(dev); |
| 1105 | #endif |
| 1106 | } |
| 1107 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1108 | /** |
| 1109 | * netif_is_multiqueue - test if device has multiple transmit queues |
| 1110 | * @dev: network device |
| 1111 | * |
| 1112 | * Check if device has multiple transmit queues |
| 1113 | * Always falls if NETDEVICE_MULTIQUEUE is not configured |
| 1114 | */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1115 | static inline int netif_is_multiqueue(const struct net_device *dev) |
| 1116 | { |
| 1117 | #ifdef CONFIG_NETDEVICES_MULTIQUEUE |
| 1118 | return (!!(NETIF_F_MULTI_QUEUE & dev->features)); |
| 1119 | #else |
| 1120 | return 0; |
| 1121 | #endif |
| 1122 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | |
| 1124 | /* Use this variant when it is known for sure that it |
Matti Linnanvuori | 0ef4730 | 2008-03-28 16:33:00 -0700 | [diff] [blame] | 1125 | * is executing from hardware interrupt context or with hardware interrupts |
| 1126 | * disabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1128 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
| 1130 | /* Use this variant in places where it could be invoked |
Matti Linnanvuori | 0ef4730 | 2008-03-28 16:33:00 -0700 | [diff] [blame] | 1131 | * from either hardware interrupt or other context, with hardware interrupts |
| 1132 | * either disabled or enabled. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | */ |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 1134 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
| 1136 | #define HAVE_NETIF_RX 1 |
| 1137 | extern int netif_rx(struct sk_buff *skb); |
| 1138 | extern int netif_rx_ni(struct sk_buff *skb); |
| 1139 | #define HAVE_NETIF_RECEIVE_SKB 1 |
| 1140 | extern int netif_receive_skb(struct sk_buff *skb); |
Mitch Williams | c2373ee | 2005-11-09 10:34:45 -0800 | [diff] [blame] | 1141 | extern int dev_valid_name(const char *name); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1142 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
| 1143 | extern int dev_ethtool(struct net *net, struct ifreq *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | extern unsigned dev_get_flags(const struct net_device *); |
| 1145 | extern int dev_change_flags(struct net_device *, unsigned); |
| 1146 | extern int dev_change_name(struct net_device *, char *); |
Eric W. Biederman | ce286d3 | 2007-09-12 13:53:49 +0200 | [diff] [blame] | 1147 | extern int dev_change_net_namespace(struct net_device *, |
| 1148 | struct net *, const char *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | extern int dev_set_mtu(struct net_device *, int); |
| 1150 | extern int dev_set_mac_address(struct net_device *, |
| 1151 | struct sockaddr *); |
Herbert Xu | f6a78bf | 2006-06-22 02:57:17 -0700 | [diff] [blame] | 1152 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
| 1153 | struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1155 | extern int netdev_budget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | |
| 1157 | /* Called by rtnetlink.c:rtnl_unlock() */ |
| 1158 | extern void netdev_run_todo(void); |
| 1159 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1160 | /** |
| 1161 | * dev_put - release reference to device |
| 1162 | * @dev: network device |
| 1163 | * |
Benjamin Thery | 9ef4429 | 2007-10-10 21:18:17 -0700 | [diff] [blame] | 1164 | * Release reference to device to allow it to be freed. |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1165 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | static inline void dev_put(struct net_device *dev) |
| 1167 | { |
| 1168 | atomic_dec(&dev->refcnt); |
| 1169 | } |
| 1170 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1171 | /** |
| 1172 | * dev_hold - get reference to device |
| 1173 | * @dev: network device |
| 1174 | * |
Benjamin Thery | 9ef4429 | 2007-10-10 21:18:17 -0700 | [diff] [blame] | 1175 | * Hold reference to device to keep it from being freed. |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1176 | */ |
Stephen Hemminger | 1533306 | 2006-03-20 22:32:28 -0800 | [diff] [blame] | 1177 | static inline void dev_hold(struct net_device *dev) |
| 1178 | { |
| 1179 | atomic_inc(&dev->refcnt); |
| 1180 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | |
| 1182 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
| 1183 | * and _off may be called from IRQ context, but it is caller |
| 1184 | * who is responsible for serialization of these calls. |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 1185 | * |
| 1186 | * The name carrier is inappropriate, these functions should really be |
| 1187 | * called netif_lowerlayer_*() because they represent the state of any |
| 1188 | * kind of lower layer not just hardware media. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | */ |
| 1190 | |
| 1191 | extern void linkwatch_fire_event(struct net_device *dev); |
| 1192 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1193 | /** |
| 1194 | * netif_carrier_ok - test if carrier present |
| 1195 | * @dev: network device |
| 1196 | * |
| 1197 | * Check if carrier is present on device |
| 1198 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | static inline int netif_carrier_ok(const struct net_device *dev) |
| 1200 | { |
| 1201 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
| 1202 | } |
| 1203 | |
| 1204 | extern void __netdev_watchdog_up(struct net_device *dev); |
| 1205 | |
Denis Vlasenko | 0a242ef | 2005-08-11 15:32:53 -0700 | [diff] [blame] | 1206 | extern void netif_carrier_on(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | |
Denis Vlasenko | 0a242ef | 2005-08-11 15:32:53 -0700 | [diff] [blame] | 1208 | extern void netif_carrier_off(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1210 | /** |
| 1211 | * netif_dormant_on - mark device as dormant. |
| 1212 | * @dev: network device |
| 1213 | * |
| 1214 | * Mark device as dormant (as per RFC2863). |
| 1215 | * |
| 1216 | * The dormant state indicates that the relevant interface is not |
| 1217 | * actually in a condition to pass packets (i.e., it is not 'up') but is |
| 1218 | * in a "pending" state, waiting for some external event. For "on- |
| 1219 | * demand" interfaces, this new state identifies the situation where the |
| 1220 | * interface is waiting for events to place it in the up state. |
| 1221 | * |
| 1222 | */ |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 1223 | static inline void netif_dormant_on(struct net_device *dev) |
| 1224 | { |
| 1225 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 1226 | linkwatch_fire_event(dev); |
| 1227 | } |
| 1228 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1229 | /** |
| 1230 | * netif_dormant_off - set device as not dormant. |
| 1231 | * @dev: network device |
| 1232 | * |
| 1233 | * Device is not in dormant state. |
| 1234 | */ |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 1235 | static inline void netif_dormant_off(struct net_device *dev) |
| 1236 | { |
| 1237 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) |
| 1238 | linkwatch_fire_event(dev); |
| 1239 | } |
| 1240 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1241 | /** |
| 1242 | * netif_dormant - test if carrier present |
| 1243 | * @dev: network device |
| 1244 | * |
| 1245 | * Check if carrier is present on device |
| 1246 | */ |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 1247 | static inline int netif_dormant(const struct net_device *dev) |
| 1248 | { |
| 1249 | return test_bit(__LINK_STATE_DORMANT, &dev->state); |
| 1250 | } |
| 1251 | |
| 1252 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1253 | /** |
| 1254 | * netif_oper_up - test if device is operational |
| 1255 | * @dev: network device |
| 1256 | * |
| 1257 | * Check if carrier is operational |
| 1258 | */ |
Stefan Rompf | b00055a | 2006-03-20 17:09:11 -0800 | [diff] [blame] | 1259 | static inline int netif_oper_up(const struct net_device *dev) { |
| 1260 | return (dev->operstate == IF_OPER_UP || |
| 1261 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); |
| 1262 | } |
| 1263 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1264 | /** |
| 1265 | * netif_device_present - is device available or removed |
| 1266 | * @dev: network device |
| 1267 | * |
| 1268 | * Check if device has not been removed from system. |
| 1269 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | static inline int netif_device_present(struct net_device *dev) |
| 1271 | { |
| 1272 | return test_bit(__LINK_STATE_PRESENT, &dev->state); |
| 1273 | } |
| 1274 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 1275 | extern void netif_device_detach(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
Denis Vlasenko | 5607943 | 2006-03-29 15:57:29 -0800 | [diff] [blame] | 1277 | extern void netif_device_attach(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | |
| 1279 | /* |
| 1280 | * Network interface message level settings |
| 1281 | */ |
| 1282 | #define HAVE_NETIF_MSG 1 |
| 1283 | |
| 1284 | enum { |
| 1285 | NETIF_MSG_DRV = 0x0001, |
| 1286 | NETIF_MSG_PROBE = 0x0002, |
| 1287 | NETIF_MSG_LINK = 0x0004, |
| 1288 | NETIF_MSG_TIMER = 0x0008, |
| 1289 | NETIF_MSG_IFDOWN = 0x0010, |
| 1290 | NETIF_MSG_IFUP = 0x0020, |
| 1291 | NETIF_MSG_RX_ERR = 0x0040, |
| 1292 | NETIF_MSG_TX_ERR = 0x0080, |
| 1293 | NETIF_MSG_TX_QUEUED = 0x0100, |
| 1294 | NETIF_MSG_INTR = 0x0200, |
| 1295 | NETIF_MSG_TX_DONE = 0x0400, |
| 1296 | NETIF_MSG_RX_STATUS = 0x0800, |
| 1297 | NETIF_MSG_PKTDATA = 0x1000, |
| 1298 | NETIF_MSG_HW = 0x2000, |
| 1299 | NETIF_MSG_WOL = 0x4000, |
| 1300 | }; |
| 1301 | |
| 1302 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
| 1303 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
| 1304 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
| 1305 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
| 1306 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
| 1307 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
| 1308 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
| 1309 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
| 1310 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
| 1311 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
| 1312 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
| 1313 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
| 1314 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
| 1315 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
| 1316 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
| 1317 | |
| 1318 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) |
| 1319 | { |
| 1320 | /* use default */ |
| 1321 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) |
| 1322 | return default_msg_enable_bits; |
| 1323 | if (debug_value == 0) /* no output */ |
| 1324 | return 0; |
| 1325 | /* set low N bits */ |
| 1326 | return (1 << debug_value) - 1; |
| 1327 | } |
| 1328 | |
shemminger@osdl.org | 0a12257 | 2005-11-30 11:45:17 -0800 | [diff] [blame] | 1329 | /* Test if receive needs to be scheduled but only if up */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1330 | static inline int netif_rx_schedule_prep(struct net_device *dev, |
| 1331 | struct napi_struct *napi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | { |
David S. Miller | a0a4619 | 2008-01-07 20:35:07 -0800 | [diff] [blame] | 1333 | return napi_schedule_prep(napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | } |
| 1335 | |
| 1336 | /* Add interface to tail of rx poll list. This assumes that _prep has |
| 1337 | * already been called and returned 1. |
| 1338 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1339 | static inline void __netif_rx_schedule(struct net_device *dev, |
| 1340 | struct napi_struct *napi) |
| 1341 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1342 | __napi_schedule(napi); |
| 1343 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
| 1345 | /* Try to reschedule poll. Called by irq handler. */ |
| 1346 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1347 | static inline void netif_rx_schedule(struct net_device *dev, |
| 1348 | struct napi_struct *napi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1350 | if (netif_rx_schedule_prep(dev, napi)) |
| 1351 | __netif_rx_schedule(dev, napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | } |
| 1353 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1354 | /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ |
| 1355 | static inline int netif_rx_reschedule(struct net_device *dev, |
| 1356 | struct napi_struct *napi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1358 | if (napi_schedule_prep(napi)) { |
| 1359 | __netif_rx_schedule(dev, napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | return 1; |
| 1361 | } |
| 1362 | return 0; |
| 1363 | } |
| 1364 | |
Herbert Xu | b0ba666 | 2007-05-29 13:22:52 -0700 | [diff] [blame] | 1365 | /* same as netif_rx_complete, except that local_irq_save(flags) |
| 1366 | * has already been issued |
| 1367 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1368 | static inline void __netif_rx_complete(struct net_device *dev, |
| 1369 | struct napi_struct *napi) |
Herbert Xu | b0ba666 | 2007-05-29 13:22:52 -0700 | [diff] [blame] | 1370 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1371 | __napi_complete(napi); |
Herbert Xu | b0ba666 | 2007-05-29 13:22:52 -0700 | [diff] [blame] | 1372 | } |
| 1373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | /* Remove interface from poll list: it must be in the poll list |
| 1375 | * on current cpu. This primitive is called by dev->poll(), when |
| 1376 | * it completes the work. The device cannot be out of poll list at this |
| 1377 | * moment, it is BUG(). |
| 1378 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1379 | static inline void netif_rx_complete(struct net_device *dev, |
| 1380 | struct napi_struct *napi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | { |
| 1382 | unsigned long flags; |
| 1383 | |
| 1384 | local_irq_save(flags); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1385 | __netif_rx_complete(dev, napi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | local_irq_restore(flags); |
| 1387 | } |
| 1388 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1389 | /** |
| 1390 | * netif_tx_lock - grab network device transmit lock |
| 1391 | * @dev: network device |
Randy Dunlap | c4ea43c | 2007-10-12 21:17:49 -0700 | [diff] [blame] | 1392 | * @cpu: cpu number of lock owner |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1393 | * |
| 1394 | * Get network device transmit lock |
| 1395 | */ |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 1396 | static inline void __netif_tx_lock(struct net_device *dev, int cpu) |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1397 | { |
| 1398 | spin_lock(&dev->_xmit_lock); |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 1399 | dev->xmit_lock_owner = cpu; |
| 1400 | } |
| 1401 | |
| 1402 | static inline void netif_tx_lock(struct net_device *dev) |
| 1403 | { |
| 1404 | __netif_tx_lock(dev, smp_processor_id()); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1405 | } |
| 1406 | |
| 1407 | static inline void netif_tx_lock_bh(struct net_device *dev) |
| 1408 | { |
| 1409 | spin_lock_bh(&dev->_xmit_lock); |
| 1410 | dev->xmit_lock_owner = smp_processor_id(); |
| 1411 | } |
| 1412 | |
| 1413 | static inline int netif_tx_trylock(struct net_device *dev) |
| 1414 | { |
Herbert Xu | 53c4b2c | 2006-07-21 14:55:38 -0700 | [diff] [blame] | 1415 | int ok = spin_trylock(&dev->_xmit_lock); |
| 1416 | if (likely(ok)) |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1417 | dev->xmit_lock_owner = smp_processor_id(); |
Herbert Xu | 53c4b2c | 2006-07-21 14:55:38 -0700 | [diff] [blame] | 1418 | return ok; |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1419 | } |
| 1420 | |
| 1421 | static inline void netif_tx_unlock(struct net_device *dev) |
| 1422 | { |
| 1423 | dev->xmit_lock_owner = -1; |
| 1424 | spin_unlock(&dev->_xmit_lock); |
| 1425 | } |
| 1426 | |
| 1427 | static inline void netif_tx_unlock_bh(struct net_device *dev) |
| 1428 | { |
| 1429 | dev->xmit_lock_owner = -1; |
| 1430 | spin_unlock_bh(&dev->_xmit_lock); |
| 1431 | } |
| 1432 | |
Jamal Hadi Salim | 22dd749 | 2007-09-16 14:40:49 -0700 | [diff] [blame] | 1433 | #define HARD_TX_LOCK(dev, cpu) { \ |
| 1434 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
| 1435 | __netif_tx_lock(dev, cpu); \ |
| 1436 | } \ |
| 1437 | } |
| 1438 | |
| 1439 | #define HARD_TX_UNLOCK(dev) { \ |
| 1440 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
| 1441 | netif_tx_unlock(dev); \ |
| 1442 | } \ |
| 1443 | } |
| 1444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | static inline void netif_tx_disable(struct net_device *dev) |
| 1446 | { |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1447 | netif_tx_lock_bh(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | netif_stop_queue(dev); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 1449 | netif_tx_unlock_bh(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | } |
| 1451 | |
| 1452 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
| 1453 | |
| 1454 | extern void ether_setup(struct net_device *dev); |
| 1455 | |
| 1456 | /* Support for loadable net-drivers */ |
Peter P Waskiewicz Jr | f25f4e4 | 2007-07-06 13:36:20 -0700 | [diff] [blame] | 1457 | extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, |
| 1458 | void (*setup)(struct net_device *), |
| 1459 | unsigned int queue_count); |
| 1460 | #define alloc_netdev(sizeof_priv, name, setup) \ |
| 1461 | alloc_netdev_mq(sizeof_priv, name, setup, 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | extern int register_netdev(struct net_device *dev); |
| 1463 | extern void unregister_netdev(struct net_device *dev); |
Patrick McHardy | 4417da6 | 2007-06-27 01:28:10 -0700 | [diff] [blame] | 1464 | /* Functions used for secondary unicast and multicast support */ |
| 1465 | extern void dev_set_rx_mode(struct net_device *dev); |
| 1466 | extern void __dev_set_rx_mode(struct net_device *dev); |
| 1467 | extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); |
| 1468 | extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); |
Chris Leech | e83a2ea | 2008-01-31 16:53:23 -0800 | [diff] [blame] | 1469 | extern int dev_unicast_sync(struct net_device *to, struct net_device *from); |
| 1470 | extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); |
| 1472 | extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); |
Patrick McHardy | a0a400d | 2007-07-14 18:52:02 -0700 | [diff] [blame] | 1473 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); |
| 1474 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); |
Patrick McHardy | 61cbc2f | 2007-06-30 13:35:52 -0700 | [diff] [blame] | 1475 | extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); |
| 1476 | extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); |
Chris Leech | e83a2ea | 2008-01-31 16:53:23 -0800 | [diff] [blame] | 1477 | extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); |
| 1478 | extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | extern void dev_set_promiscuity(struct net_device *dev, int inc); |
| 1480 | extern void dev_set_allmulti(struct net_device *dev, int inc); |
| 1481 | extern void netdev_state_change(struct net_device *dev); |
Stephen Hemminger | d8a33ac | 2005-05-29 14:13:47 -0700 | [diff] [blame] | 1482 | extern void netdev_features_change(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | /* Load a device via the kmod */ |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1484 | extern void dev_load(struct net *net, const char *name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | extern void dev_mcast_init(void); |
| 1486 | extern int netdev_max_backlog; |
| 1487 | extern int weight_p; |
| 1488 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1489 | extern int skb_checksum_help(struct sk_buff *skb); |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 1490 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); |
Herbert Xu | fb286bb | 2005-11-10 13:01:24 -0800 | [diff] [blame] | 1491 | #ifdef CONFIG_BUG |
| 1492 | extern void netdev_rx_csum_fault(struct net_device *dev); |
| 1493 | #else |
| 1494 | static inline void netdev_rx_csum_fault(struct net_device *dev) |
| 1495 | { |
| 1496 | } |
| 1497 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | /* rx skb timestamps */ |
| 1499 | extern void net_enable_timestamp(void); |
| 1500 | extern void net_disable_timestamp(void); |
| 1501 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1502 | #ifdef CONFIG_PROC_FS |
| 1503 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); |
| 1504 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); |
| 1505 | extern void dev_seq_stop(struct seq_file *seq, void *v); |
| 1506 | #endif |
| 1507 | |
| 1508 | extern void linkwatch_run_queue(void); |
| 1509 | |
Herbert Xu | 7f353bf | 2007-08-10 15:47:58 -0700 | [diff] [blame] | 1510 | extern int netdev_compute_features(unsigned long all, unsigned long one); |
| 1511 | |
Herbert Xu | bcd7611 | 2006-06-30 13:36:35 -0700 | [diff] [blame] | 1512 | static inline int net_gso_ok(int features, int gso_type) |
| 1513 | { |
| 1514 | int feature = gso_type << NETIF_F_GSO_SHIFT; |
| 1515 | return (features & feature) == feature; |
| 1516 | } |
| 1517 | |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 1518 | static inline int skb_gso_ok(struct sk_buff *skb, int features) |
| 1519 | { |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1520 | return net_gso_ok(features, skb_shinfo(skb)->gso_type); |
Herbert Xu | 576a30e | 2006-06-27 13:22:38 -0700 | [diff] [blame] | 1521 | } |
| 1522 | |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame] | 1523 | static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
| 1524 | { |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1525 | return skb_is_gso(skb) && |
| 1526 | (!skb_gso_ok(skb, dev->features) || |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1527 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); |
Herbert Xu | 7967168 | 2006-06-22 02:40:14 -0700 | [diff] [blame] | 1528 | } |
| 1529 | |
Peter P Waskiewicz Jr | 82cc1a7 | 2008-03-21 03:43:19 -0700 | [diff] [blame] | 1530 | static inline void netif_set_gso_max_size(struct net_device *dev, |
| 1531 | unsigned int size) |
| 1532 | { |
| 1533 | dev->gso_max_size = size; |
| 1534 | } |
| 1535 | |
David S. Miller | 7ea49ed | 2006-08-14 17:08:36 -0700 | [diff] [blame] | 1536 | /* On bonding slaves other than the currently active slave, suppress |
Jay Vosburgh | f5b2b96 | 2006-09-22 21:54:53 -0700 | [diff] [blame] | 1537 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and |
| 1538 | * ARP on active-backup slaves with arp_validate enabled. |
David S. Miller | 7ea49ed | 2006-08-14 17:08:36 -0700 | [diff] [blame] | 1539 | */ |
| 1540 | static inline int skb_bond_should_drop(struct sk_buff *skb) |
| 1541 | { |
| 1542 | struct net_device *dev = skb->dev; |
| 1543 | struct net_device *master = dev->master; |
| 1544 | |
| 1545 | if (master && |
| 1546 | (dev->priv_flags & IFF_SLAVE_INACTIVE)) { |
Jay Vosburgh | f5b2b96 | 2006-09-22 21:54:53 -0700 | [diff] [blame] | 1547 | if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && |
| 1548 | skb->protocol == __constant_htons(ETH_P_ARP)) |
| 1549 | return 0; |
| 1550 | |
David S. Miller | 7ea49ed | 2006-08-14 17:08:36 -0700 | [diff] [blame] | 1551 | if (master->priv_flags & IFF_MASTER_ALB) { |
| 1552 | if (skb->pkt_type != PACKET_BROADCAST && |
| 1553 | skb->pkt_type != PACKET_MULTICAST) |
| 1554 | return 0; |
| 1555 | } |
| 1556 | if (master->priv_flags & IFF_MASTER_8023AD && |
| 1557 | skb->protocol == __constant_htons(ETH_P_SLOW)) |
| 1558 | return 0; |
| 1559 | |
| 1560 | return 1; |
| 1561 | } |
| 1562 | return 0; |
| 1563 | } |
| 1564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | #endif /* __KERNEL__ */ |
| 1566 | |
| 1567 | #endif /* _LINUX_DEV_H */ |