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 * 10 * Authors: Ross Biro 11 * Fred N. van Kempen, <[email protected]> 12 * Corey Minyard <[email protected]> 13 * Donald J. Becker, <[email protected]> 14 * Alan Cox, <[email protected]> 15 * Bjorn Ekwall. <[email protected]> 16 * Pekka Riikonen <[email protected]> 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__ 33 #include <linux/timer.h> 34 #include <linux/delay.h> 35 #include <asm/atomic.h> 36 #include <asm/cache.h> 37 #include <asm/byteorder.h> 38 39 #include <linux/device.h> 40 #include <linux/percpu.h> 41 #include <linux/dmaengine.h> 42 #include <linux/workqueue.h> 43 44 #include <net/net_namespace.h> 45 #include <net/dsa.h> 46 #ifdef CONFIG_DCB 47 #include <net/dcbnl.h> 48 #endif 49 50 struct vlan_group; 51 struct ethtool_ops; 52 struct netpoll_info; 53 /* 802.11 specific */ 54 struct wireless_dev; 55 /* source back-compat hooks */ 56 #define SET_ETHTOOL_OPS(netdev,ops) \ 57 ( (netdev)->ethtool_ops = (ops) ) 58 59 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev 60 functions are available. */ 61 #define HAVE_FREE_NETDEV /* free_netdev() */ 62 #define HAVE_NETDEV_PRIV /* netdev_priv() */ 63 64 #define NET_XMIT_SUCCESS 0 65 #define NET_XMIT_DROP 1 /* skb dropped */ 66 #define NET_XMIT_CN 2 /* congestion notification */ 67 #define NET_XMIT_POLICED 3 /* skb is shot by police */ 68 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */ 69 70 /* Backlog congestion levels */ 71 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ 72 #define NET_RX_DROP 1 /* packet dropped */ 73 #define NET_RX_CN_LOW 2 /* storm alert, just in case */ 74 #define NET_RX_CN_MOD 3 /* Storm on its way! */ 75 #define NET_RX_CN_HIGH 4 /* The storm is here */ 76 #define NET_RX_BAD 5 /* packet dropped due to kernel error */ 77 78 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It 79 * indicates that the device will soon be dropping packets, or already drops 80 * some packets of the same priority; prompting us to send less aggressively. */ 81 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) 82 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) 83 84 #endif 85 86 #define MAX_ADDR_LEN 32 /* Largest hardware address length */ 87 88 /* Driver transmit return codes */ 89 #define NETDEV_TX_OK 0 /* driver took care of packet */ 90 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ 91 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ 92 93 #ifdef __KERNEL__ 94 95 /* 96 * Compute the worst case header length according to the protocols 97 * used. 98 */ 99 100 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 101 # if defined(CONFIG_MAC80211_MESH) 102 # define LL_MAX_HEADER 128 103 # else 104 # define LL_MAX_HEADER 96 105 # endif 106 #elif defined(CONFIG_TR) 107 # define LL_MAX_HEADER 48 108 #else 109 # define LL_MAX_HEADER 32 110 #endif 111 112 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ 113 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ 114 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ 115 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) 116 #define MAX_HEADER LL_MAX_HEADER 117 #else 118 #define MAX_HEADER (LL_MAX_HEADER + 48) 119 #endif 120 121 #endif /* __KERNEL__ */ 122 123 /* 124 * Network device statistics. Akin to the 2.0 ether stats but 125 * with byte counters. 126 */ 127 128 struct net_device_stats 129 { 130 unsigned long rx_packets; /* total packets received */ 131 unsigned long tx_packets; /* total packets transmitted */ 132 unsigned long rx_bytes; /* total bytes received */ 133 unsigned long tx_bytes; /* total bytes transmitted */ 134 unsigned long rx_errors; /* bad packets received */ 135 unsigned long tx_errors; /* packet transmit problems */ 136 unsigned long rx_dropped; /* no space in linux buffers */ 137 unsigned long tx_dropped; /* no space available in linux */ 138 unsigned long multicast; /* multicast packets received */ 139 unsigned long collisions; 140 141 /* detailed rx_errors: */ 142 unsigned long rx_length_errors; 143 unsigned long rx_over_errors; /* receiver ring buff overflow */ 144 unsigned long rx_crc_errors; /* recved pkt with crc error */ 145 unsigned long rx_frame_errors; /* recv'd frame alignment error */ 146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */ 147 unsigned long rx_missed_errors; /* receiver missed packet */ 148 149 /* detailed tx_errors */ 150 unsigned long tx_aborted_errors; 151 unsigned long tx_carrier_errors; 152 unsigned long tx_fifo_errors; 153 unsigned long tx_heartbeat_errors; 154 unsigned long tx_window_errors; 155 156 /* for cslip etc */ 157 unsigned long rx_compressed; 158 unsigned long tx_compressed; 159 }; 160 161 162 /* Media selection options. */ 163 enum { 164 IF_PORT_UNKNOWN = 0, 165 IF_PORT_10BASE2, 166 IF_PORT_10BASET, 167 IF_PORT_AUI, 168 IF_PORT_100BASET, 169 IF_PORT_100BASETX, 170 IF_PORT_100BASEFX 171 }; 172 173 #ifdef __KERNEL__ 174 175 #include <linux/cache.h> 176 #include <linux/skbuff.h> 177 178 struct neighbour; 179 struct neigh_parms; 180 struct sk_buff; 181 182 struct netif_rx_stats 183 { 184 unsigned total; 185 unsigned dropped; 186 unsigned time_squeeze; 187 unsigned cpu_collision; 188 }; 189 190 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); 191 192 struct dev_addr_list 193 { 194 struct dev_addr_list *next; 195 u8 da_addr[MAX_ADDR_LEN]; 196 u8 da_addrlen; 197 u8 da_synced; 198 int da_users; 199 int da_gusers; 200 }; 201 202 /* 203 * We tag multicasts with these structures. 204 */ 205 206 #define dev_mc_list dev_addr_list 207 #define dmi_addr da_addr 208 #define dmi_addrlen da_addrlen 209 #define dmi_users da_users 210 #define dmi_gusers da_gusers 211 212 struct hh_cache 213 { 214 struct hh_cache *hh_next; /* Next entry */ 215 atomic_t hh_refcnt; /* number of users */ 216 /* 217 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate 218 * cache line on SMP. 219 * They are mostly read, but hh_refcnt may be changed quite frequently, 220 * incurring cache line ping pongs. 221 */ 222 __be16 hh_type ____cacheline_aligned_in_smp; 223 /* protocol identifier, f.e ETH_P_IP 224 * NOTE: For VLANs, this will be the 225 * encapuslated type. --BLG 226 */ 227 u16 hh_len; /* length of header */ 228 int (*hh_output)(struct sk_buff *skb); 229 seqlock_t hh_lock; 230 231 /* cached hardware header; allow for machine alignment needs. */ 232 #define HH_DATA_MOD 16 233 #define HH_DATA_OFF(__len) \ 234 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) 235 #define HH_DATA_ALIGN(__len) \ 236 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) 237 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; 238 }; 239 240 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. 241 * Alternative is: 242 * dev->hard_header_len ? (dev->hard_header_len + 243 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 244 * 245 * We could use other alignment values, but we must maintain the 246 * relationship HH alignment <= LL alignment. 247 * 248 * LL_ALLOCATED_SPACE also takes into account the tailroom the device 249 * may need. 250 */ 251 #define LL_RESERVED_SPACE(dev) \ 252 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 253 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ 254 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 255 #define LL_ALLOCATED_SPACE(dev) \ 256 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 257 258 struct header_ops { 259 int (*create) (struct sk_buff *skb, struct net_device *dev, 260 unsigned short type, const void *daddr, 261 const void *saddr, unsigned len); 262 int (*parse)(const struct sk_buff *skb, unsigned char *haddr); 263 int (*rebuild)(struct sk_buff *skb); 264 #define HAVE_HEADER_CACHE 265 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); 266 void (*cache_update)(struct hh_cache *hh, 267 const struct net_device *dev, 268 const unsigned char *haddr); 269 }; 270 271 /* These flag bits are private to the generic network queueing 272 * layer, they may not be explicitly referenced by any other 273 * code. 274 */ 275 276 enum netdev_state_t 277 { 278 __LINK_STATE_START, 279 __LINK_STATE_PRESENT, 280 __LINK_STATE_NOCARRIER, 281 __LINK_STATE_LINKWATCH_PENDING, 282 __LINK_STATE_DORMANT, 283 }; 284 285 286 /* 287 * This structure holds at boot time configured netdevice settings. They 288 * are then used in the device probing. 289 */ 290 struct netdev_boot_setup { 291 char name[IFNAMSIZ]; 292 struct ifmap map; 293 }; 294 #define NETDEV_BOOT_SETUP_MAX 8 295 296 extern int __init netdev_boot_setup(char *str); 297 298 /* 299 * Structure for NAPI scheduling similar to tasklet but with weighting 300 */ 301 struct napi_struct { 302 /* The poll_list must only be managed by the entity which 303 * changes the state of the NAPI_STATE_SCHED bit. This means 304 * whoever atomically sets that bit can add this napi_struct 305 * to the per-cpu poll_list, and whoever clears that bit 306 * can remove from the list right before clearing the bit. 307 */ 308 struct list_head poll_list; 309 310 unsigned long state; 311 int weight; 312 int (*poll)(struct napi_struct *, int); 313 #ifdef CONFIG_NETPOLL 314 spinlock_t poll_lock; 315 int poll_owner; 316 struct net_device *dev; 317 struct list_head dev_list; 318 #endif 319 }; 320 321 enum 322 { 323 NAPI_STATE_SCHED, /* Poll is scheduled */ 324 NAPI_STATE_DISABLE, /* Disable pending */ 325 }; 326 327 extern void __napi_schedule(struct napi_struct *n); 328 329 static inline int napi_disable_pending(struct napi_struct *n) 330 { 331 return test_bit(NAPI_STATE_DISABLE, &n->state); 332 } 333 334 /** 335 * napi_schedule_prep - check if napi can be scheduled 336 * @n: napi context 337 * 338 * Test if NAPI routine is already running, and if not mark 339 * it as running. This is used as a condition variable 340 * insure only one NAPI poll instance runs. We also make 341 * sure there is no pending NAPI disable. 342 */ 343 static inline int napi_schedule_prep(struct napi_struct *n) 344 { 345 return !napi_disable_pending(n) && 346 !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 347 } 348 349 /** 350 * napi_schedule - schedule NAPI poll 351 * @n: napi context 352 * 353 * Schedule NAPI poll routine to be called if it is not already 354 * running. 355 */ 356 static inline void napi_schedule(struct napi_struct *n) 357 { 358 if (napi_schedule_prep(n)) 359 __napi_schedule(n); 360 } 361 362 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 363 static inline int napi_reschedule(struct napi_struct *napi) 364 { 365 if (napi_schedule_prep(napi)) { 366 __napi_schedule(napi); 367 return 1; 368 } 369 return 0; 370 } 371 372 /** 373 * napi_complete - NAPI processing complete 374 * @n: napi context 375 * 376 * Mark NAPI processing as complete. 377 */ 378 static inline void __napi_complete(struct napi_struct *n) 379 { 380 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 381 list_del(&n->poll_list); 382 smp_mb__before_clear_bit(); 383 clear_bit(NAPI_STATE_SCHED, &n->state); 384 } 385 386 static inline void napi_complete(struct napi_struct *n) 387 { 388 unsigned long flags; 389 390 local_irq_save(flags); 391 __napi_complete(n); 392 local_irq_restore(flags); 393 } 394 395 /** 396 * napi_disable - prevent NAPI from scheduling 397 * @n: napi context 398 * 399 * Stop NAPI from being scheduled on this context. 400 * Waits till any outstanding processing completes. 401 */ 402 static inline void napi_disable(struct napi_struct *n) 403 { 404 set_bit(NAPI_STATE_DISABLE, &n->state); 405 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 406 msleep(1); 407 clear_bit(NAPI_STATE_DISABLE, &n->state); 408 } 409 410 /** 411 * napi_enable - enable NAPI scheduling 412 * @n: napi context 413 * 414 * Resume NAPI from being scheduled on this context. 415 * Must be paired with napi_disable. 416 */ 417 static inline void napi_enable(struct napi_struct *n) 418 { 419 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 420 smp_mb__before_clear_bit(); 421 clear_bit(NAPI_STATE_SCHED, &n->state); 422 } 423 424 #ifdef CONFIG_SMP 425 /** 426 * napi_synchronize - wait until NAPI is not running 427 * @n: napi context 428 * 429 * Wait until NAPI is done being scheduled on this context. 430 * Waits till any outstanding processing completes but 431 * does not disable future activations. 432 */ 433 static inline void napi_synchronize(const struct napi_struct *n) 434 { 435 while (test_bit(NAPI_STATE_SCHED, &n->state)) 436 msleep(1); 437 } 438 #else 439 # define napi_synchronize(n) barrier() 440 #endif 441 442 enum netdev_queue_state_t 443 { 444 __QUEUE_STATE_XOFF, 445 __QUEUE_STATE_FROZEN, 446 }; 447 448 struct netdev_queue { 449 struct net_device *dev; 450 struct Qdisc *qdisc; 451 unsigned long state; 452 spinlock_t _xmit_lock; 453 int xmit_lock_owner; 454 struct Qdisc *qdisc_sleeping; 455 } ____cacheline_aligned_in_smp; 456 457 458 /* 459 * This structure defines the management hooks for network devices. 460 * The following hooks can be defined; unless noted otherwise, they are 461 * optional and can be filled with a null pointer. 462 * 463 * int (*ndo_init)(struct net_device *dev); 464 * This function is called once when network device is registered. 465 * The network device can use this to any late stage initializaton 466 * or semantic validattion. It can fail with an error code which will 467 * be propogated back to register_netdev 468 * 469 * void (*ndo_uninit)(struct net_device *dev); 470 * This function is called when device is unregistered or when registration 471 * fails. It is not called if init fails. 472 * 473 * int (*ndo_open)(struct net_device *dev); 474 * This function is called when network device transistions to the up 475 * state. 476 * 477 * int (*ndo_stop)(struct net_device *dev); 478 * This function is called when network device transistions to the down 479 * state. 480 * 481 * int (*ndo_hard_start_xmit)(struct sk_buff *skb, struct net_device *dev); 482 * Called when a packet needs to be transmitted. 483 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED, 484 * Required can not be NULL. 485 * 486 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); 487 * Called to decide which queue to when device supports multiple 488 * transmit queues. 489 * 490 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); 491 * This function is called to allow device receiver to make 492 * changes to configuration when multicast or promiscious is enabled. 493 * 494 * void (*ndo_set_rx_mode)(struct net_device *dev); 495 * This function is called device changes address list filtering. 496 * 497 * void (*ndo_set_multicast_list)(struct net_device *dev); 498 * This function is called when the multicast address list changes. 499 * 500 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); 501 * This function is called when the Media Access Control address 502 * needs to be changed. If not this interface is not defined, the 503 * mac address can not be changed. 504 * 505 * int (*ndo_validate_addr)(struct net_device *dev); 506 * Test if Media Access Control address is valid for the device. 507 * 508 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); 509 * Called when a user request an ioctl which can't be handled by 510 * the generic interface code. If not defined ioctl's return 511 * not supported error code. 512 * 513 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); 514 * Used to set network devices bus interface parameters. This interface 515 * is retained for legacy reason, new devices should use the bus 516 * interface (PCI) for low level management. 517 * 518 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); 519 * Called when a user wants to change the Maximum Transfer Unit 520 * of a device. If not defined, any request to change MTU will 521 * will return an error. 522 * 523 * void (*ndo_tx_timeout)(struct net_device *dev); 524 * Callback uses when the transmitter has not made any progress 525 * for dev->watchdog ticks. 526 * 527 * struct net_device_stats* (*get_stats)(struct net_device *dev); 528 * Called when a user wants to get the network device usage 529 * statistics. If not defined, the counters in dev->stats will 530 * be used. 531 * 532 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); 533 * If device support VLAN receive accleration 534 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called 535 * when vlan groups for the device changes. Note: grp is NULL 536 * if no vlan's groups are being used. 537 * 538 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); 539 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 540 * this function is called when a VLAN id is registered. 541 * 542 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); 543 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 544 * this function is called when a VLAN id is unregistered. 545 * 546 * void (*ndo_poll_controller)(struct net_device *dev); 547 */ 548 #define HAVE_NET_DEVICE_OPS 549 struct net_device_ops { 550 int (*ndo_init)(struct net_device *dev); 551 void (*ndo_uninit)(struct net_device *dev); 552 int (*ndo_open)(struct net_device *dev); 553 int (*ndo_stop)(struct net_device *dev); 554 int (*ndo_start_xmit) (struct sk_buff *skb, 555 struct net_device *dev); 556 u16 (*ndo_select_queue)(struct net_device *dev, 557 struct sk_buff *skb); 558 #define HAVE_CHANGE_RX_FLAGS 559 void (*ndo_change_rx_flags)(struct net_device *dev, 560 int flags); 561 #define HAVE_SET_RX_MODE 562 void (*ndo_set_rx_mode)(struct net_device *dev); 563 #define HAVE_MULTICAST 564 void (*ndo_set_multicast_list)(struct net_device *dev); 565 #define HAVE_SET_MAC_ADDR 566 int (*ndo_set_mac_address)(struct net_device *dev, 567 void *addr); 568 #define HAVE_VALIDATE_ADDR 569 int (*ndo_validate_addr)(struct net_device *dev); 570 #define HAVE_PRIVATE_IOCTL 571 int (*ndo_do_ioctl)(struct net_device *dev, 572 struct ifreq *ifr, int cmd); 573 #define HAVE_SET_CONFIG 574 int (*ndo_set_config)(struct net_device *dev, 575 struct ifmap *map); 576 #define HAVE_CHANGE_MTU 577 int (*ndo_change_mtu)(struct net_device *dev, 578 int new_mtu); 579 int (*ndo_neigh_setup)(struct net_device *dev, 580 struct neigh_parms *); 581 #define HAVE_TX_TIMEOUT 582 void (*ndo_tx_timeout) (struct net_device *dev); 583 584 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); 585 586 void (*ndo_vlan_rx_register)(struct net_device *dev, 587 struct vlan_group *grp); 588 void (*ndo_vlan_rx_add_vid)(struct net_device *dev, 589 unsigned short vid); 590 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, 591 unsigned short vid); 592 #ifdef CONFIG_NET_POLL_CONTROLLER 593 #define HAVE_NETDEV_POLL 594 void (*ndo_poll_controller)(struct net_device *dev); 595 #endif 596 }; 597 598 /* 599 * The DEVICE structure. 600 * Actually, this whole structure is a big mistake. It mixes I/O 601 * data with strictly "high-level" data, and it has to know about 602 * almost every data structure used in the INET module. 603 * 604 * FIXME: cleanup struct net_device such that network protocol info 605 * moves out. 606 */ 607 608 struct net_device 609 { 610 611 /* 612 * This is the first field of the "visible" part of this structure 613 * (i.e. as seen by users in the "Space.c" file). It is the name 614 * the interface. 615 */ 616 char name[IFNAMSIZ]; 617 /* device name hash chain */ 618 struct hlist_node name_hlist; 619 /* snmp alias */ 620 char *ifalias; 621 622 /* 623 * I/O specific fields 624 * FIXME: Merge these and struct ifmap into one 625 */ 626 unsigned long mem_end; /* shared mem end */ 627 unsigned long mem_start; /* shared mem start */ 628 unsigned long base_addr; /* device I/O address */ 629 unsigned int irq; /* device IRQ number */ 630 631 /* 632 * Some hardware also needs these fields, but they are not 633 * part of the usual set specified in Space.c. 634 */ 635 636 unsigned char if_port; /* Selectable AUI, TP,..*/ 637 unsigned char dma; /* DMA channel */ 638 639 unsigned long state; 640 641 struct list_head dev_list; 642 #ifdef CONFIG_NETPOLL 643 struct list_head napi_list; 644 #endif 645 646 /* Net device features */ 647 unsigned long features; 648 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 649 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 650 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 651 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 652 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 653 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 654 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 655 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 656 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 657 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 658 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 659 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 660 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 661 /* do not use LLTX in new drivers */ 662 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 663 #define NETIF_F_LRO 32768 /* large receive offload */ 664 665 /* Segmentation offload features */ 666 #define NETIF_F_GSO_SHIFT 16 667 #define NETIF_F_GSO_MASK 0xffff0000 668 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 669 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 670 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 671 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 672 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 673 674 /* List of features with software fallbacks. */ 675 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 676 677 678 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 679 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 680 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 681 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 682 683 /* 684 * If one device supports one of these features, then enable them 685 * for all in netdev_increment_features. 686 */ 687 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ 688 NETIF_F_SG | NETIF_F_HIGHDMA | \ 689 NETIF_F_FRAGLIST) 690 691 /* Interface index. Unique device identifier */ 692 int ifindex; 693 int iflink; 694 695 struct net_device_stats stats; 696 697 #ifdef CONFIG_WIRELESS_EXT 698 /* List of functions to handle Wireless Extensions (instead of ioctl). 699 * See <net/iw_handler.h> for details. Jean II */ 700 const struct iw_handler_def * wireless_handlers; 701 /* Instance data managed by the core of Wireless Extensions. */ 702 struct iw_public_data * wireless_data; 703 #endif 704 /* Management operations */ 705 const struct net_device_ops *netdev_ops; 706 const struct ethtool_ops *ethtool_ops; 707 708 /* Hardware header description */ 709 const struct header_ops *header_ops; 710 711 unsigned int flags; /* interface flags (a la BSD) */ 712 unsigned short gflags; 713 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 714 unsigned short padded; /* How much padding added by alloc_netdev() */ 715 716 unsigned char operstate; /* RFC2863 operstate */ 717 unsigned char link_mode; /* mapping policy to operstate */ 718 719 unsigned mtu; /* interface MTU value */ 720 unsigned short type; /* interface hardware type */ 721 unsigned short hard_header_len; /* hardware hdr length */ 722 723 /* extra head- and tailroom the hardware may need, but not in all cases 724 * can this be guaranteed, especially tailroom. Some cases also use 725 * LL_MAX_HEADER instead to allocate the skb. 726 */ 727 unsigned short needed_headroom; 728 unsigned short needed_tailroom; 729 730 struct net_device *master; /* Pointer to master device of a group, 731 * which this device is member of. 732 */ 733 734 /* Interface address info. */ 735 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 736 unsigned char addr_len; /* hardware address length */ 737 unsigned short dev_id; /* for shared network cards */ 738 739 spinlock_t addr_list_lock; 740 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ 741 int uc_count; /* Number of installed ucasts */ 742 int uc_promisc; 743 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 744 int mc_count; /* Number of installed mcasts */ 745 unsigned int promiscuity; 746 unsigned int allmulti; 747 748 749 /* Protocol specific pointers */ 750 751 #ifdef CONFIG_NET_DSA 752 void *dsa_ptr; /* dsa specific data */ 753 #endif 754 void *atalk_ptr; /* AppleTalk link */ 755 void *ip_ptr; /* IPv4 specific data */ 756 void *dn_ptr; /* DECnet specific data */ 757 void *ip6_ptr; /* IPv6 specific data */ 758 void *ec_ptr; /* Econet specific data */ 759 void *ax25_ptr; /* AX.25 specific data */ 760 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 761 assign before registering */ 762 763 /* 764 * Cache line mostly used on receive path (including eth_type_trans()) 765 */ 766 unsigned long last_rx; /* Time of last Rx */ 767 /* Interface address info used in eth_type_trans() */ 768 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast 769 because most packets are unicast) */ 770 771 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 772 773 struct netdev_queue rx_queue; 774 775 struct netdev_queue *_tx ____cacheline_aligned_in_smp; 776 777 /* Number of TX queues allocated at alloc_netdev_mq() time */ 778 unsigned int num_tx_queues; 779 780 /* Number of TX queues currently active in device */ 781 unsigned int real_num_tx_queues; 782 783 unsigned long tx_queue_len; /* Max frames per queue allowed */ 784 spinlock_t tx_global_lock; 785 /* 786 * One part is mostly used on xmit path (device) 787 */ 788 void *priv; /* pointer to private data */ 789 /* These may be needed for future network-power-down code. */ 790 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 791 792 int watchdog_timeo; /* used by dev_watchdog() */ 793 struct timer_list watchdog_timer; 794 795 /* Number of references to this device */ 796 atomic_t refcnt ____cacheline_aligned_in_smp; 797 798 /* delayed register/unregister */ 799 struct list_head todo_list; 800 /* device index hash chain */ 801 struct hlist_node index_hlist; 802 803 struct net_device *link_watch_next; 804 805 /* register/unregister state machine */ 806 enum { NETREG_UNINITIALIZED=0, 807 NETREG_REGISTERED, /* completed register_netdevice */ 808 NETREG_UNREGISTERING, /* called unregister_netdevice */ 809 NETREG_UNREGISTERED, /* completed unregister todo */ 810 NETREG_RELEASED, /* called free_netdev */ 811 } reg_state; 812 813 /* Called from unregister, can be used to call free_netdev */ 814 void (*destructor)(struct net_device *dev); 815 816 #ifdef CONFIG_NETPOLL 817 struct netpoll_info *npinfo; 818 #endif 819 820 #ifdef CONFIG_NET_NS 821 /* Network namespace this network device is inside */ 822 struct net *nd_net; 823 #endif 824 825 /* mid-layer private */ 826 void *ml_priv; 827 828 /* bridge stuff */ 829 struct net_bridge_port *br_port; 830 /* macvlan */ 831 struct macvlan_port *macvlan_port; 832 /* GARP */ 833 struct garp_port *garp_port; 834 835 /* class/net/name entry */ 836 struct device dev; 837 /* space for optional statistics and wireless sysfs groups */ 838 struct attribute_group *sysfs_groups[3]; 839 840 /* rtnetlink link ops */ 841 const struct rtnl_link_ops *rtnl_link_ops; 842 843 /* VLAN feature mask */ 844 unsigned long vlan_features; 845 846 /* for setting kernel sock attribute on TCP connection setup */ 847 #define GSO_MAX_SIZE 65536 848 unsigned int gso_max_size; 849 850 #ifdef CONFIG_DCB 851 /* Data Center Bridging netlink ops */ 852 struct dcbnl_rtnl_ops *dcbnl_ops; 853 #endif 854 855 #ifdef CONFIG_COMPAT_NET_DEV_OPS 856 struct { 857 int (*init)(struct net_device *dev); 858 void (*uninit)(struct net_device *dev); 859 int (*open)(struct net_device *dev); 860 int (*stop)(struct net_device *dev); 861 int (*hard_start_xmit) (struct sk_buff *skb, 862 struct net_device *dev); 863 u16 (*select_queue)(struct net_device *dev, 864 struct sk_buff *skb); 865 void (*change_rx_flags)(struct net_device *dev, 866 int flags); 867 void (*set_rx_mode)(struct net_device *dev); 868 void (*set_multicast_list)(struct net_device *dev); 869 int (*set_mac_address)(struct net_device *dev, 870 void *addr); 871 int (*validate_addr)(struct net_device *dev); 872 int (*do_ioctl)(struct net_device *dev, 873 struct ifreq *ifr, int cmd); 874 int (*set_config)(struct net_device *dev, 875 struct ifmap *map); 876 int (*change_mtu)(struct net_device *dev, int new_mtu); 877 int (*neigh_setup)(struct net_device *dev, 878 struct neigh_parms *); 879 void (*tx_timeout) (struct net_device *dev); 880 struct net_device_stats* (*get_stats)(struct net_device *dev); 881 void (*vlan_rx_register)(struct net_device *dev, 882 struct vlan_group *grp); 883 void (*vlan_rx_add_vid)(struct net_device *dev, 884 unsigned short vid); 885 void (*vlan_rx_kill_vid)(struct net_device *dev, 886 unsigned short vid); 887 #ifdef CONFIG_NET_POLL_CONTROLLER 888 void (*poll_controller)(struct net_device *dev); 889 #endif 890 }; 891 #endif 892 }; 893 #define to_net_dev(d) container_of(d, struct net_device, dev) 894 895 #define NETDEV_ALIGN 32 896 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) 897 898 static inline 899 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, 900 unsigned int index) 901 { 902 return &dev->_tx[index]; 903 } 904 905 static inline void netdev_for_each_tx_queue(struct net_device *dev, 906 void (*f)(struct net_device *, 907 struct netdev_queue *, 908 void *), 909 void *arg) 910 { 911 unsigned int i; 912 913 for (i = 0; i < dev->num_tx_queues; i++) 914 f(dev, &dev->_tx[i], arg); 915 } 916 917 /* 918 * Net namespace inlines 919 */ 920 static inline 921 struct net *dev_net(const struct net_device *dev) 922 { 923 #ifdef CONFIG_NET_NS 924 return dev->nd_net; 925 #else 926 return &init_net; 927 #endif 928 } 929 930 static inline 931 void dev_net_set(struct net_device *dev, struct net *net) 932 { 933 #ifdef CONFIG_NET_NS 934 release_net(dev->nd_net); 935 dev->nd_net = hold_net(net); 936 #endif 937 } 938 939 static inline bool netdev_uses_dsa_tags(struct net_device *dev) 940 { 941 #ifdef CONFIG_NET_DSA_TAG_DSA 942 if (dev->dsa_ptr != NULL) 943 return dsa_uses_dsa_tags(dev->dsa_ptr); 944 #endif 945 946 return 0; 947 } 948 949 static inline bool netdev_uses_trailer_tags(struct net_device *dev) 950 { 951 #ifdef CONFIG_NET_DSA_TAG_TRAILER 952 if (dev->dsa_ptr != NULL) 953 return dsa_uses_trailer_tags(dev->dsa_ptr); 954 #endif 955 956 return 0; 957 } 958 959 /** 960 * netdev_priv - access network device private data 961 * @dev: network device 962 * 963 * Get network device private data 964 */ 965 static inline void *netdev_priv(const struct net_device *dev) 966 { 967 return (char *)dev + ((sizeof(struct net_device) 968 + NETDEV_ALIGN_CONST) 969 & ~NETDEV_ALIGN_CONST); 970 } 971 972 /* Set the sysfs physical device reference for the network logical device 973 * if set prior to registration will cause a symlink during initialization. 974 */ 975 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 976 977 /** 978 * netif_napi_add - initialize a napi context 979 * @dev: network device 980 * @napi: napi context 981 * @poll: polling function 982 * @weight: default weight 983 * 984 * netif_napi_add() must be used to initialize a napi context prior to calling 985 * *any* of the other napi related functions. 986 */ 987 static inline void netif_napi_add(struct net_device *dev, 988 struct napi_struct *napi, 989 int (*poll)(struct napi_struct *, int), 990 int weight) 991 { 992 INIT_LIST_HEAD(&napi->poll_list); 993 napi->poll = poll; 994 napi->weight = weight; 995 #ifdef CONFIG_NETPOLL 996 napi->dev = dev; 997 list_add(&napi->dev_list, &dev->napi_list); 998 spin_lock_init(&napi->poll_lock); 999 napi->poll_owner = -1; 1000 #endif 1001 set_bit(NAPI_STATE_SCHED, &napi->state); 1002 } 1003 1004 /** 1005 * netif_napi_del - remove a napi context 1006 * @napi: napi context 1007 * 1008 * netif_napi_del() removes a napi context from the network device napi list 1009 */ 1010 static inline void netif_napi_del(struct napi_struct *napi) 1011 { 1012 #ifdef CONFIG_NETPOLL 1013 list_del(&napi->dev_list); 1014 #endif 1015 } 1016 1017 struct packet_type { 1018 __be16 type; /* This is really htons(ether_type). */ 1019 struct net_device *dev; /* NULL is wildcarded here */ 1020 int (*func) (struct sk_buff *, 1021 struct net_device *, 1022 struct packet_type *, 1023 struct net_device *); 1024 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 1025 int features); 1026 int (*gso_send_check)(struct sk_buff *skb); 1027 void *af_packet_priv; 1028 struct list_head list; 1029 }; 1030 1031 #include <linux/interrupt.h> 1032 #include <linux/notifier.h> 1033 1034 extern rwlock_t dev_base_lock; /* Device list lock */ 1035 1036 1037 #define for_each_netdev(net, d) \ 1038 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 1039 #define for_each_netdev_safe(net, d, n) \ 1040 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 1041 #define for_each_netdev_continue(net, d) \ 1042 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 1043 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 1044 1045 static inline struct net_device *next_net_device(struct net_device *dev) 1046 { 1047 struct list_head *lh; 1048 struct net *net; 1049 1050 net = dev_net(dev); 1051 lh = dev->dev_list.next; 1052 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 1053 } 1054 1055 static inline struct net_device *first_net_device(struct net *net) 1056 { 1057 return list_empty(&net->dev_base_head) ? NULL : 1058 net_device_entry(net->dev_base_head.next); 1059 } 1060 1061 extern int netdev_boot_setup_check(struct net_device *dev); 1062 extern unsigned long netdev_boot_base(const char *prefix, int unit); 1063 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 1064 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 1065 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 1066 extern void dev_add_pack(struct packet_type *pt); 1067 extern void dev_remove_pack(struct packet_type *pt); 1068 extern void __dev_remove_pack(struct packet_type *pt); 1069 1070 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 1071 unsigned short mask); 1072 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 1073 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 1074 extern int dev_alloc_name(struct net_device *dev, const char *name); 1075 extern int dev_open(struct net_device *dev); 1076 extern int dev_close(struct net_device *dev); 1077 extern void dev_disable_lro(struct net_device *dev); 1078 extern int dev_queue_xmit(struct sk_buff *skb); 1079 extern int register_netdevice(struct net_device *dev); 1080 extern void unregister_netdevice(struct net_device *dev); 1081 extern void free_netdev(struct net_device *dev); 1082 extern void synchronize_net(void); 1083 extern int register_netdevice_notifier(struct notifier_block *nb); 1084 extern int unregister_netdevice_notifier(struct notifier_block *nb); 1085 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 1086 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 1087 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 1088 extern int dev_restart(struct net_device *dev); 1089 #ifdef CONFIG_NETPOLL_TRAP 1090 extern int netpoll_trap(void); 1091 #endif 1092 1093 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 1094 unsigned short type, 1095 const void *daddr, const void *saddr, 1096 unsigned len) 1097 { 1098 if (!dev->header_ops || !dev->header_ops->create) 1099 return 0; 1100 1101 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 1102 } 1103 1104 static inline int dev_parse_header(const struct sk_buff *skb, 1105 unsigned char *haddr) 1106 { 1107 const struct net_device *dev = skb->dev; 1108 1109 if (!dev->header_ops || !dev->header_ops->parse) 1110 return 0; 1111 return dev->header_ops->parse(skb, haddr); 1112 } 1113 1114 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 1115 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 1116 static inline int unregister_gifconf(unsigned int family) 1117 { 1118 return register_gifconf(family, NULL); 1119 } 1120 1121 /* 1122 * Incoming packets are placed on per-cpu queues so that 1123 * no locking is needed. 1124 */ 1125 struct softnet_data 1126 { 1127 struct Qdisc *output_queue; 1128 struct sk_buff_head input_pkt_queue; 1129 struct list_head poll_list; 1130 struct sk_buff *completion_queue; 1131 1132 struct napi_struct backlog; 1133 #ifdef CONFIG_NET_DMA 1134 struct dma_chan *net_dma; 1135 #endif 1136 }; 1137 1138 DECLARE_PER_CPU(struct softnet_data,softnet_data); 1139 1140 #define HAVE_NETIF_QUEUE 1141 1142 extern void __netif_schedule(struct Qdisc *q); 1143 1144 static inline void netif_schedule_queue(struct netdev_queue *txq) 1145 { 1146 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1147 __netif_schedule(txq->qdisc); 1148 } 1149 1150 static inline void netif_tx_schedule_all(struct net_device *dev) 1151 { 1152 unsigned int i; 1153 1154 for (i = 0; i < dev->num_tx_queues; i++) 1155 netif_schedule_queue(netdev_get_tx_queue(dev, i)); 1156 } 1157 1158 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) 1159 { 1160 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1161 } 1162 1163 /** 1164 * netif_start_queue - allow transmit 1165 * @dev: network device 1166 * 1167 * Allow upper layers to call the device hard_start_xmit routine. 1168 */ 1169 static inline void netif_start_queue(struct net_device *dev) 1170 { 1171 netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); 1172 } 1173 1174 static inline void netif_tx_start_all_queues(struct net_device *dev) 1175 { 1176 unsigned int i; 1177 1178 for (i = 0; i < dev->num_tx_queues; i++) { 1179 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1180 netif_tx_start_queue(txq); 1181 } 1182 } 1183 1184 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) 1185 { 1186 #ifdef CONFIG_NETPOLL_TRAP 1187 if (netpoll_trap()) { 1188 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1189 return; 1190 } 1191 #endif 1192 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) 1193 __netif_schedule(dev_queue->qdisc); 1194 } 1195 1196 /** 1197 * netif_wake_queue - restart transmit 1198 * @dev: network device 1199 * 1200 * Allow upper layers to call the device hard_start_xmit routine. 1201 * Used for flow control when transmit resources are available. 1202 */ 1203 static inline void netif_wake_queue(struct net_device *dev) 1204 { 1205 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); 1206 } 1207 1208 static inline void netif_tx_wake_all_queues(struct net_device *dev) 1209 { 1210 unsigned int i; 1211 1212 for (i = 0; i < dev->num_tx_queues; i++) { 1213 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1214 netif_tx_wake_queue(txq); 1215 } 1216 } 1217 1218 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) 1219 { 1220 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1221 } 1222 1223 /** 1224 * netif_stop_queue - stop transmitted packets 1225 * @dev: network device 1226 * 1227 * Stop upper layers calling the device hard_start_xmit routine. 1228 * Used for flow control when transmit resources are unavailable. 1229 */ 1230 static inline void netif_stop_queue(struct net_device *dev) 1231 { 1232 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); 1233 } 1234 1235 static inline void netif_tx_stop_all_queues(struct net_device *dev) 1236 { 1237 unsigned int i; 1238 1239 for (i = 0; i < dev->num_tx_queues; i++) { 1240 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1241 netif_tx_stop_queue(txq); 1242 } 1243 } 1244 1245 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) 1246 { 1247 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1248 } 1249 1250 /** 1251 * netif_queue_stopped - test if transmit queue is flowblocked 1252 * @dev: network device 1253 * 1254 * Test if transmit queue on device is currently unable to send. 1255 */ 1256 static inline int netif_queue_stopped(const struct net_device *dev) 1257 { 1258 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); 1259 } 1260 1261 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) 1262 { 1263 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); 1264 } 1265 1266 /** 1267 * netif_running - test if up 1268 * @dev: network device 1269 * 1270 * Test if the device has been brought up. 1271 */ 1272 static inline int netif_running(const struct net_device *dev) 1273 { 1274 return test_bit(__LINK_STATE_START, &dev->state); 1275 } 1276 1277 /* 1278 * Routines to manage the subqueues on a device. We only need start 1279 * stop, and a check if it's stopped. All other device management is 1280 * done at the overall netdevice level. 1281 * Also test the device if we're multiqueue. 1282 */ 1283 1284 /** 1285 * netif_start_subqueue - allow sending packets on subqueue 1286 * @dev: network device 1287 * @queue_index: sub queue index 1288 * 1289 * Start individual transmit queue of a device with multiple transmit queues. 1290 */ 1291 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1292 { 1293 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1294 clear_bit(__QUEUE_STATE_XOFF, &txq->state); 1295 } 1296 1297 /** 1298 * netif_stop_subqueue - stop sending packets on subqueue 1299 * @dev: network device 1300 * @queue_index: sub queue index 1301 * 1302 * Stop individual transmit queue of a device with multiple transmit queues. 1303 */ 1304 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1305 { 1306 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1307 #ifdef CONFIG_NETPOLL_TRAP 1308 if (netpoll_trap()) 1309 return; 1310 #endif 1311 set_bit(__QUEUE_STATE_XOFF, &txq->state); 1312 } 1313 1314 /** 1315 * netif_subqueue_stopped - test status of subqueue 1316 * @dev: network device 1317 * @queue_index: sub queue index 1318 * 1319 * Check individual transmit queue of a device with multiple transmit queues. 1320 */ 1321 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1322 u16 queue_index) 1323 { 1324 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1325 return test_bit(__QUEUE_STATE_XOFF, &txq->state); 1326 } 1327 1328 static inline int netif_subqueue_stopped(const struct net_device *dev, 1329 struct sk_buff *skb) 1330 { 1331 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1332 } 1333 1334 /** 1335 * netif_wake_subqueue - allow sending packets on subqueue 1336 * @dev: network device 1337 * @queue_index: sub queue index 1338 * 1339 * Resume individual transmit queue of a device with multiple transmit queues. 1340 */ 1341 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1342 { 1343 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1344 #ifdef CONFIG_NETPOLL_TRAP 1345 if (netpoll_trap()) 1346 return; 1347 #endif 1348 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) 1349 __netif_schedule(txq->qdisc); 1350 } 1351 1352 /** 1353 * netif_is_multiqueue - test if device has multiple transmit queues 1354 * @dev: network device 1355 * 1356 * Check if device has multiple transmit queues 1357 */ 1358 static inline int netif_is_multiqueue(const struct net_device *dev) 1359 { 1360 return (dev->num_tx_queues > 1); 1361 } 1362 1363 /* Use this variant when it is known for sure that it 1364 * is executing from hardware interrupt context or with hardware interrupts 1365 * disabled. 1366 */ 1367 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1368 1369 /* Use this variant in places where it could be invoked 1370 * from either hardware interrupt or other context, with hardware interrupts 1371 * either disabled or enabled. 1372 */ 1373 extern void dev_kfree_skb_any(struct sk_buff *skb); 1374 1375 #define HAVE_NETIF_RX 1 1376 extern int netif_rx(struct sk_buff *skb); 1377 extern int netif_rx_ni(struct sk_buff *skb); 1378 #define HAVE_NETIF_RECEIVE_SKB 1 1379 extern int netif_receive_skb(struct sk_buff *skb); 1380 extern void netif_nit_deliver(struct sk_buff *skb); 1381 extern int dev_valid_name(const char *name); 1382 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1383 extern int dev_ethtool(struct net *net, struct ifreq *); 1384 extern unsigned dev_get_flags(const struct net_device *); 1385 extern int dev_change_flags(struct net_device *, unsigned); 1386 extern int dev_change_name(struct net_device *, const char *); 1387 extern int dev_set_alias(struct net_device *, const char *, size_t); 1388 extern int dev_change_net_namespace(struct net_device *, 1389 struct net *, const char *); 1390 extern int dev_set_mtu(struct net_device *, int); 1391 extern int dev_set_mac_address(struct net_device *, 1392 struct sockaddr *); 1393 extern int dev_hard_start_xmit(struct sk_buff *skb, 1394 struct net_device *dev, 1395 struct netdev_queue *txq); 1396 1397 extern int netdev_budget; 1398 1399 /* Called by rtnetlink.c:rtnl_unlock() */ 1400 extern void netdev_run_todo(void); 1401 1402 /** 1403 * dev_put - release reference to device 1404 * @dev: network device 1405 * 1406 * Release reference to device to allow it to be freed. 1407 */ 1408 static inline void dev_put(struct net_device *dev) 1409 { 1410 atomic_dec(&dev->refcnt); 1411 } 1412 1413 /** 1414 * dev_hold - get reference to device 1415 * @dev: network device 1416 * 1417 * Hold reference to device to keep it from being freed. 1418 */ 1419 static inline void dev_hold(struct net_device *dev) 1420 { 1421 atomic_inc(&dev->refcnt); 1422 } 1423 1424 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1425 * and _off may be called from IRQ context, but it is caller 1426 * who is responsible for serialization of these calls. 1427 * 1428 * The name carrier is inappropriate, these functions should really be 1429 * called netif_lowerlayer_*() because they represent the state of any 1430 * kind of lower layer not just hardware media. 1431 */ 1432 1433 extern void linkwatch_fire_event(struct net_device *dev); 1434 1435 /** 1436 * netif_carrier_ok - test if carrier present 1437 * @dev: network device 1438 * 1439 * Check if carrier is present on device 1440 */ 1441 static inline int netif_carrier_ok(const struct net_device *dev) 1442 { 1443 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1444 } 1445 1446 extern void __netdev_watchdog_up(struct net_device *dev); 1447 1448 extern void netif_carrier_on(struct net_device *dev); 1449 1450 extern void netif_carrier_off(struct net_device *dev); 1451 1452 /** 1453 * netif_dormant_on - mark device as dormant. 1454 * @dev: network device 1455 * 1456 * Mark device as dormant (as per RFC2863). 1457 * 1458 * The dormant state indicates that the relevant interface is not 1459 * actually in a condition to pass packets (i.e., it is not 'up') but is 1460 * in a "pending" state, waiting for some external event. For "on- 1461 * demand" interfaces, this new state identifies the situation where the 1462 * interface is waiting for events to place it in the up state. 1463 * 1464 */ 1465 static inline void netif_dormant_on(struct net_device *dev) 1466 { 1467 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1468 linkwatch_fire_event(dev); 1469 } 1470 1471 /** 1472 * netif_dormant_off - set device as not dormant. 1473 * @dev: network device 1474 * 1475 * Device is not in dormant state. 1476 */ 1477 static inline void netif_dormant_off(struct net_device *dev) 1478 { 1479 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1480 linkwatch_fire_event(dev); 1481 } 1482 1483 /** 1484 * netif_dormant - test if carrier present 1485 * @dev: network device 1486 * 1487 * Check if carrier is present on device 1488 */ 1489 static inline int netif_dormant(const struct net_device *dev) 1490 { 1491 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1492 } 1493 1494 1495 /** 1496 * netif_oper_up - test if device is operational 1497 * @dev: network device 1498 * 1499 * Check if carrier is operational 1500 */ 1501 static inline int netif_oper_up(const struct net_device *dev) { 1502 return (dev->operstate == IF_OPER_UP || 1503 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1504 } 1505 1506 /** 1507 * netif_device_present - is device available or removed 1508 * @dev: network device 1509 * 1510 * Check if device has not been removed from system. 1511 */ 1512 static inline int netif_device_present(struct net_device *dev) 1513 { 1514 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1515 } 1516 1517 extern void netif_device_detach(struct net_device *dev); 1518 1519 extern void netif_device_attach(struct net_device *dev); 1520 1521 /* 1522 * Network interface message level settings 1523 */ 1524 #define HAVE_NETIF_MSG 1 1525 1526 enum { 1527 NETIF_MSG_DRV = 0x0001, 1528 NETIF_MSG_PROBE = 0x0002, 1529 NETIF_MSG_LINK = 0x0004, 1530 NETIF_MSG_TIMER = 0x0008, 1531 NETIF_MSG_IFDOWN = 0x0010, 1532 NETIF_MSG_IFUP = 0x0020, 1533 NETIF_MSG_RX_ERR = 0x0040, 1534 NETIF_MSG_TX_ERR = 0x0080, 1535 NETIF_MSG_TX_QUEUED = 0x0100, 1536 NETIF_MSG_INTR = 0x0200, 1537 NETIF_MSG_TX_DONE = 0x0400, 1538 NETIF_MSG_RX_STATUS = 0x0800, 1539 NETIF_MSG_PKTDATA = 0x1000, 1540 NETIF_MSG_HW = 0x2000, 1541 NETIF_MSG_WOL = 0x4000, 1542 }; 1543 1544 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1545 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1546 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1547 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1548 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1549 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1550 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1551 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1552 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1553 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1554 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1555 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1556 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1557 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1558 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1559 1560 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1561 { 1562 /* use default */ 1563 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1564 return default_msg_enable_bits; 1565 if (debug_value == 0) /* no output */ 1566 return 0; 1567 /* set low N bits */ 1568 return (1 << debug_value) - 1; 1569 } 1570 1571 /* Test if receive needs to be scheduled but only if up */ 1572 static inline int netif_rx_schedule_prep(struct net_device *dev, 1573 struct napi_struct *napi) 1574 { 1575 return napi_schedule_prep(napi); 1576 } 1577 1578 /* Add interface to tail of rx poll list. This assumes that _prep has 1579 * already been called and returned 1. 1580 */ 1581 static inline void __netif_rx_schedule(struct net_device *dev, 1582 struct napi_struct *napi) 1583 { 1584 __napi_schedule(napi); 1585 } 1586 1587 /* Try to reschedule poll. Called by irq handler. */ 1588 1589 static inline void netif_rx_schedule(struct net_device *dev, 1590 struct napi_struct *napi) 1591 { 1592 if (netif_rx_schedule_prep(dev, napi)) 1593 __netif_rx_schedule(dev, napi); 1594 } 1595 1596 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ 1597 static inline int netif_rx_reschedule(struct net_device *dev, 1598 struct napi_struct *napi) 1599 { 1600 if (napi_schedule_prep(napi)) { 1601 __netif_rx_schedule(dev, napi); 1602 return 1; 1603 } 1604 return 0; 1605 } 1606 1607 /* same as netif_rx_complete, except that local_irq_save(flags) 1608 * has already been issued 1609 */ 1610 static inline void __netif_rx_complete(struct net_device *dev, 1611 struct napi_struct *napi) 1612 { 1613 __napi_complete(napi); 1614 } 1615 1616 /* Remove interface from poll list: it must be in the poll list 1617 * on current cpu. This primitive is called by dev->poll(), when 1618 * it completes the work. The device cannot be out of poll list at this 1619 * moment, it is BUG(). 1620 */ 1621 static inline void netif_rx_complete(struct net_device *dev, 1622 struct napi_struct *napi) 1623 { 1624 unsigned long flags; 1625 1626 local_irq_save(flags); 1627 __netif_rx_complete(dev, napi); 1628 local_irq_restore(flags); 1629 } 1630 1631 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) 1632 { 1633 spin_lock(&txq->_xmit_lock); 1634 txq->xmit_lock_owner = cpu; 1635 } 1636 1637 static inline void __netif_tx_lock_bh(struct netdev_queue *txq) 1638 { 1639 spin_lock_bh(&txq->_xmit_lock); 1640 txq->xmit_lock_owner = smp_processor_id(); 1641 } 1642 1643 static inline int __netif_tx_trylock(struct netdev_queue *txq) 1644 { 1645 int ok = spin_trylock(&txq->_xmit_lock); 1646 if (likely(ok)) 1647 txq->xmit_lock_owner = smp_processor_id(); 1648 return ok; 1649 } 1650 1651 static inline void __netif_tx_unlock(struct netdev_queue *txq) 1652 { 1653 txq->xmit_lock_owner = -1; 1654 spin_unlock(&txq->_xmit_lock); 1655 } 1656 1657 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) 1658 { 1659 txq->xmit_lock_owner = -1; 1660 spin_unlock_bh(&txq->_xmit_lock); 1661 } 1662 1663 /** 1664 * netif_tx_lock - grab network device transmit lock 1665 * @dev: network device 1666 * 1667 * Get network device transmit lock 1668 */ 1669 static inline void netif_tx_lock(struct net_device *dev) 1670 { 1671 unsigned int i; 1672 int cpu; 1673 1674 spin_lock(&dev->tx_global_lock); 1675 cpu = smp_processor_id(); 1676 for (i = 0; i < dev->num_tx_queues; i++) { 1677 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1678 1679 /* We are the only thread of execution doing a 1680 * freeze, but we have to grab the _xmit_lock in 1681 * order to synchronize with threads which are in 1682 * the ->hard_start_xmit() handler and already 1683 * checked the frozen bit. 1684 */ 1685 __netif_tx_lock(txq, cpu); 1686 set_bit(__QUEUE_STATE_FROZEN, &txq->state); 1687 __netif_tx_unlock(txq); 1688 } 1689 } 1690 1691 static inline void netif_tx_lock_bh(struct net_device *dev) 1692 { 1693 local_bh_disable(); 1694 netif_tx_lock(dev); 1695 } 1696 1697 static inline void netif_tx_unlock(struct net_device *dev) 1698 { 1699 unsigned int i; 1700 1701 for (i = 0; i < dev->num_tx_queues; i++) { 1702 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1703 1704 /* No need to grab the _xmit_lock here. If the 1705 * queue is not stopped for another reason, we 1706 * force a schedule. 1707 */ 1708 clear_bit(__QUEUE_STATE_FROZEN, &txq->state); 1709 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1710 __netif_schedule(txq->qdisc); 1711 } 1712 spin_unlock(&dev->tx_global_lock); 1713 } 1714 1715 static inline void netif_tx_unlock_bh(struct net_device *dev) 1716 { 1717 netif_tx_unlock(dev); 1718 local_bh_enable(); 1719 } 1720 1721 #define HARD_TX_LOCK(dev, txq, cpu) { \ 1722 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1723 __netif_tx_lock(txq, cpu); \ 1724 } \ 1725 } 1726 1727 #define HARD_TX_UNLOCK(dev, txq) { \ 1728 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1729 __netif_tx_unlock(txq); \ 1730 } \ 1731 } 1732 1733 static inline void netif_tx_disable(struct net_device *dev) 1734 { 1735 unsigned int i; 1736 int cpu; 1737 1738 local_bh_disable(); 1739 cpu = smp_processor_id(); 1740 for (i = 0; i < dev->num_tx_queues; i++) { 1741 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1742 1743 __netif_tx_lock(txq, cpu); 1744 netif_tx_stop_queue(txq); 1745 __netif_tx_unlock(txq); 1746 } 1747 local_bh_enable(); 1748 } 1749 1750 static inline void netif_addr_lock(struct net_device *dev) 1751 { 1752 spin_lock(&dev->addr_list_lock); 1753 } 1754 1755 static inline void netif_addr_lock_bh(struct net_device *dev) 1756 { 1757 spin_lock_bh(&dev->addr_list_lock); 1758 } 1759 1760 static inline void netif_addr_unlock(struct net_device *dev) 1761 { 1762 spin_unlock(&dev->addr_list_lock); 1763 } 1764 1765 static inline void netif_addr_unlock_bh(struct net_device *dev) 1766 { 1767 spin_unlock_bh(&dev->addr_list_lock); 1768 } 1769 1770 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1771 1772 extern void ether_setup(struct net_device *dev); 1773 1774 /* Support for loadable net-drivers */ 1775 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1776 void (*setup)(struct net_device *), 1777 unsigned int queue_count); 1778 #define alloc_netdev(sizeof_priv, name, setup) \ 1779 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1780 extern int register_netdev(struct net_device *dev); 1781 extern void unregister_netdev(struct net_device *dev); 1782 /* Functions used for secondary unicast and multicast support */ 1783 extern void dev_set_rx_mode(struct net_device *dev); 1784 extern void __dev_set_rx_mode(struct net_device *dev); 1785 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); 1786 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); 1787 extern int dev_unicast_sync(struct net_device *to, struct net_device *from); 1788 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); 1789 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1790 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1791 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1792 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1793 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1794 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1795 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1796 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1797 extern int dev_set_promiscuity(struct net_device *dev, int inc); 1798 extern int dev_set_allmulti(struct net_device *dev, int inc); 1799 extern void netdev_state_change(struct net_device *dev); 1800 extern void netdev_bonding_change(struct net_device *dev); 1801 extern void netdev_features_change(struct net_device *dev); 1802 /* Load a device via the kmod */ 1803 extern void dev_load(struct net *net, const char *name); 1804 extern void dev_mcast_init(void); 1805 extern const struct net_device_stats *dev_get_stats(struct net_device *dev); 1806 1807 extern int netdev_max_backlog; 1808 extern int weight_p; 1809 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1810 extern int skb_checksum_help(struct sk_buff *skb); 1811 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1812 #ifdef CONFIG_BUG 1813 extern void netdev_rx_csum_fault(struct net_device *dev); 1814 #else 1815 static inline void netdev_rx_csum_fault(struct net_device *dev) 1816 { 1817 } 1818 #endif 1819 /* rx skb timestamps */ 1820 extern void net_enable_timestamp(void); 1821 extern void net_disable_timestamp(void); 1822 1823 #ifdef CONFIG_PROC_FS 1824 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1825 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1826 extern void dev_seq_stop(struct seq_file *seq, void *v); 1827 #endif 1828 1829 extern int netdev_class_create_file(struct class_attribute *class_attr); 1830 extern void netdev_class_remove_file(struct class_attribute *class_attr); 1831 1832 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); 1833 1834 extern void linkwatch_run_queue(void); 1835 1836 unsigned long netdev_increment_features(unsigned long all, unsigned long one, 1837 unsigned long mask); 1838 unsigned long netdev_fix_features(unsigned long features, const char *name); 1839 1840 static inline int net_gso_ok(int features, int gso_type) 1841 { 1842 int feature = gso_type << NETIF_F_GSO_SHIFT; 1843 return (features & feature) == feature; 1844 } 1845 1846 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1847 { 1848 return net_gso_ok(features, skb_shinfo(skb)->gso_type); 1849 } 1850 1851 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1852 { 1853 return skb_is_gso(skb) && 1854 (!skb_gso_ok(skb, dev->features) || 1855 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1856 } 1857 1858 static inline void netif_set_gso_max_size(struct net_device *dev, 1859 unsigned int size) 1860 { 1861 dev->gso_max_size = size; 1862 } 1863 1864 /* On bonding slaves other than the currently active slave, suppress 1865 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1866 * ARP on active-backup slaves with arp_validate enabled. 1867 */ 1868 static inline int skb_bond_should_drop(struct sk_buff *skb) 1869 { 1870 struct net_device *dev = skb->dev; 1871 struct net_device *master = dev->master; 1872 1873 if (master) { 1874 if (master->priv_flags & IFF_MASTER_ARPMON) 1875 dev->last_rx = jiffies; 1876 1877 if (dev->priv_flags & IFF_SLAVE_INACTIVE) { 1878 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1879 skb->protocol == __constant_htons(ETH_P_ARP)) 1880 return 0; 1881 1882 if (master->priv_flags & IFF_MASTER_ALB) { 1883 if (skb->pkt_type != PACKET_BROADCAST && 1884 skb->pkt_type != PACKET_MULTICAST) 1885 return 0; 1886 } 1887 if (master->priv_flags & IFF_MASTER_8023AD && 1888 skb->protocol == __constant_htons(ETH_P_SLOW)) 1889 return 0; 1890 1891 return 1; 1892 } 1893 } 1894 return 0; 1895 } 1896 1897 extern struct pernet_operations __net_initdata loopback_net_ops; 1898 #endif /* __KERNEL__ */ 1899 1900 #endif /* _LINUX_DEV_H */ 1901