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 #endif 317 struct net_device *dev; 318 struct list_head dev_list; 319 struct sk_buff *gro_list; 320 struct sk_buff *skb; 321 }; 322 323 enum 324 { 325 NAPI_STATE_SCHED, /* Poll is scheduled */ 326 NAPI_STATE_DISABLE, /* Disable pending */ 327 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ 328 }; 329 330 extern void __napi_schedule(struct napi_struct *n); 331 332 static inline int napi_disable_pending(struct napi_struct *n) 333 { 334 return test_bit(NAPI_STATE_DISABLE, &n->state); 335 } 336 337 /** 338 * napi_schedule_prep - check if napi can be scheduled 339 * @n: napi context 340 * 341 * Test if NAPI routine is already running, and if not mark 342 * it as running. This is used as a condition variable 343 * insure only one NAPI poll instance runs. We also make 344 * sure there is no pending NAPI disable. 345 */ 346 static inline int napi_schedule_prep(struct napi_struct *n) 347 { 348 return !napi_disable_pending(n) && 349 !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 350 } 351 352 /** 353 * napi_schedule - schedule NAPI poll 354 * @n: napi context 355 * 356 * Schedule NAPI poll routine to be called if it is not already 357 * running. 358 */ 359 static inline void napi_schedule(struct napi_struct *n) 360 { 361 if (napi_schedule_prep(n)) 362 __napi_schedule(n); 363 } 364 365 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 366 static inline int napi_reschedule(struct napi_struct *napi) 367 { 368 if (napi_schedule_prep(napi)) { 369 __napi_schedule(napi); 370 return 1; 371 } 372 return 0; 373 } 374 375 /** 376 * napi_complete - NAPI processing complete 377 * @n: napi context 378 * 379 * Mark NAPI processing as complete. 380 */ 381 extern void __napi_complete(struct napi_struct *n); 382 extern void napi_complete(struct napi_struct *n); 383 384 /** 385 * napi_disable - prevent NAPI from scheduling 386 * @n: napi context 387 * 388 * Stop NAPI from being scheduled on this context. 389 * Waits till any outstanding processing completes. 390 */ 391 static inline void napi_disable(struct napi_struct *n) 392 { 393 set_bit(NAPI_STATE_DISABLE, &n->state); 394 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 395 msleep(1); 396 clear_bit(NAPI_STATE_DISABLE, &n->state); 397 } 398 399 /** 400 * napi_enable - enable NAPI scheduling 401 * @n: napi context 402 * 403 * Resume NAPI from being scheduled on this context. 404 * Must be paired with napi_disable. 405 */ 406 static inline void napi_enable(struct napi_struct *n) 407 { 408 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 409 smp_mb__before_clear_bit(); 410 clear_bit(NAPI_STATE_SCHED, &n->state); 411 } 412 413 #ifdef CONFIG_SMP 414 /** 415 * napi_synchronize - wait until NAPI is not running 416 * @n: napi context 417 * 418 * Wait until NAPI is done being scheduled on this context. 419 * Waits till any outstanding processing completes but 420 * does not disable future activations. 421 */ 422 static inline void napi_synchronize(const struct napi_struct *n) 423 { 424 while (test_bit(NAPI_STATE_SCHED, &n->state)) 425 msleep(1); 426 } 427 #else 428 # define napi_synchronize(n) barrier() 429 #endif 430 431 enum netdev_queue_state_t 432 { 433 __QUEUE_STATE_XOFF, 434 __QUEUE_STATE_FROZEN, 435 }; 436 437 struct netdev_queue { 438 struct net_device *dev; 439 struct Qdisc *qdisc; 440 unsigned long state; 441 spinlock_t _xmit_lock; 442 int xmit_lock_owner; 443 struct Qdisc *qdisc_sleeping; 444 } ____cacheline_aligned_in_smp; 445 446 447 /* 448 * This structure defines the management hooks for network devices. 449 * The following hooks can be defined; unless noted otherwise, they are 450 * optional and can be filled with a null pointer. 451 * 452 * int (*ndo_init)(struct net_device *dev); 453 * This function is called once when network device is registered. 454 * The network device can use this to any late stage initializaton 455 * or semantic validattion. It can fail with an error code which will 456 * be propogated back to register_netdev 457 * 458 * void (*ndo_uninit)(struct net_device *dev); 459 * This function is called when device is unregistered or when registration 460 * fails. It is not called if init fails. 461 * 462 * int (*ndo_open)(struct net_device *dev); 463 * This function is called when network device transistions to the up 464 * state. 465 * 466 * int (*ndo_stop)(struct net_device *dev); 467 * This function is called when network device transistions to the down 468 * state. 469 * 470 * int (*ndo_hard_start_xmit)(struct sk_buff *skb, struct net_device *dev); 471 * Called when a packet needs to be transmitted. 472 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED, 473 * Required can not be NULL. 474 * 475 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); 476 * Called to decide which queue to when device supports multiple 477 * transmit queues. 478 * 479 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); 480 * This function is called to allow device receiver to make 481 * changes to configuration when multicast or promiscious is enabled. 482 * 483 * void (*ndo_set_rx_mode)(struct net_device *dev); 484 * This function is called device changes address list filtering. 485 * 486 * void (*ndo_set_multicast_list)(struct net_device *dev); 487 * This function is called when the multicast address list changes. 488 * 489 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); 490 * This function is called when the Media Access Control address 491 * needs to be changed. If not this interface is not defined, the 492 * mac address can not be changed. 493 * 494 * int (*ndo_validate_addr)(struct net_device *dev); 495 * Test if Media Access Control address is valid for the device. 496 * 497 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); 498 * Called when a user request an ioctl which can't be handled by 499 * the generic interface code. If not defined ioctl's return 500 * not supported error code. 501 * 502 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); 503 * Used to set network devices bus interface parameters. This interface 504 * is retained for legacy reason, new devices should use the bus 505 * interface (PCI) for low level management. 506 * 507 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); 508 * Called when a user wants to change the Maximum Transfer Unit 509 * of a device. If not defined, any request to change MTU will 510 * will return an error. 511 * 512 * void (*ndo_tx_timeout)(struct net_device *dev); 513 * Callback uses when the transmitter has not made any progress 514 * for dev->watchdog ticks. 515 * 516 * struct net_device_stats* (*get_stats)(struct net_device *dev); 517 * Called when a user wants to get the network device usage 518 * statistics. If not defined, the counters in dev->stats will 519 * be used. 520 * 521 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); 522 * If device support VLAN receive accleration 523 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called 524 * when vlan groups for the device changes. Note: grp is NULL 525 * if no vlan's groups are being used. 526 * 527 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); 528 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 529 * this function is called when a VLAN id is registered. 530 * 531 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); 532 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 533 * this function is called when a VLAN id is unregistered. 534 * 535 * void (*ndo_poll_controller)(struct net_device *dev); 536 */ 537 #define HAVE_NET_DEVICE_OPS 538 struct net_device_ops { 539 int (*ndo_init)(struct net_device *dev); 540 void (*ndo_uninit)(struct net_device *dev); 541 int (*ndo_open)(struct net_device *dev); 542 int (*ndo_stop)(struct net_device *dev); 543 int (*ndo_start_xmit) (struct sk_buff *skb, 544 struct net_device *dev); 545 u16 (*ndo_select_queue)(struct net_device *dev, 546 struct sk_buff *skb); 547 #define HAVE_CHANGE_RX_FLAGS 548 void (*ndo_change_rx_flags)(struct net_device *dev, 549 int flags); 550 #define HAVE_SET_RX_MODE 551 void (*ndo_set_rx_mode)(struct net_device *dev); 552 #define HAVE_MULTICAST 553 void (*ndo_set_multicast_list)(struct net_device *dev); 554 #define HAVE_SET_MAC_ADDR 555 int (*ndo_set_mac_address)(struct net_device *dev, 556 void *addr); 557 #define HAVE_VALIDATE_ADDR 558 int (*ndo_validate_addr)(struct net_device *dev); 559 #define HAVE_PRIVATE_IOCTL 560 int (*ndo_do_ioctl)(struct net_device *dev, 561 struct ifreq *ifr, int cmd); 562 #define HAVE_SET_CONFIG 563 int (*ndo_set_config)(struct net_device *dev, 564 struct ifmap *map); 565 #define HAVE_CHANGE_MTU 566 int (*ndo_change_mtu)(struct net_device *dev, 567 int new_mtu); 568 int (*ndo_neigh_setup)(struct net_device *dev, 569 struct neigh_parms *); 570 #define HAVE_TX_TIMEOUT 571 void (*ndo_tx_timeout) (struct net_device *dev); 572 573 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); 574 575 void (*ndo_vlan_rx_register)(struct net_device *dev, 576 struct vlan_group *grp); 577 void (*ndo_vlan_rx_add_vid)(struct net_device *dev, 578 unsigned short vid); 579 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, 580 unsigned short vid); 581 #ifdef CONFIG_NET_POLL_CONTROLLER 582 #define HAVE_NETDEV_POLL 583 void (*ndo_poll_controller)(struct net_device *dev); 584 #endif 585 }; 586 587 /* 588 * The DEVICE structure. 589 * Actually, this whole structure is a big mistake. It mixes I/O 590 * data with strictly "high-level" data, and it has to know about 591 * almost every data structure used in the INET module. 592 * 593 * FIXME: cleanup struct net_device such that network protocol info 594 * moves out. 595 */ 596 597 struct net_device 598 { 599 600 /* 601 * This is the first field of the "visible" part of this structure 602 * (i.e. as seen by users in the "Space.c" file). It is the name 603 * the interface. 604 */ 605 char name[IFNAMSIZ]; 606 /* device name hash chain */ 607 struct hlist_node name_hlist; 608 /* snmp alias */ 609 char *ifalias; 610 611 /* 612 * I/O specific fields 613 * FIXME: Merge these and struct ifmap into one 614 */ 615 unsigned long mem_end; /* shared mem end */ 616 unsigned long mem_start; /* shared mem start */ 617 unsigned long base_addr; /* device I/O address */ 618 unsigned int irq; /* device IRQ number */ 619 620 /* 621 * Some hardware also needs these fields, but they are not 622 * part of the usual set specified in Space.c. 623 */ 624 625 unsigned char if_port; /* Selectable AUI, TP,..*/ 626 unsigned char dma; /* DMA channel */ 627 628 unsigned long state; 629 630 struct list_head dev_list; 631 struct list_head napi_list; 632 633 /* Net device features */ 634 unsigned long features; 635 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 636 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 637 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 638 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 639 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 640 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 641 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 642 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 643 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 644 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 645 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 646 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 647 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 648 /* do not use LLTX in new drivers */ 649 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 650 #define NETIF_F_GRO 16384 /* Generic receive offload */ 651 #define NETIF_F_LRO 32768 /* large receive offload */ 652 653 /* Segmentation offload features */ 654 #define NETIF_F_GSO_SHIFT 16 655 #define NETIF_F_GSO_MASK 0xffff0000 656 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 657 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 658 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 659 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 660 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 661 662 /* List of features with software fallbacks. */ 663 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 664 665 666 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 667 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 668 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 669 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 670 671 /* 672 * If one device supports one of these features, then enable them 673 * for all in netdev_increment_features. 674 */ 675 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ 676 NETIF_F_SG | NETIF_F_HIGHDMA | \ 677 NETIF_F_FRAGLIST) 678 679 /* Interface index. Unique device identifier */ 680 int ifindex; 681 int iflink; 682 683 struct net_device_stats stats; 684 685 #ifdef CONFIG_WIRELESS_EXT 686 /* List of functions to handle Wireless Extensions (instead of ioctl). 687 * See <net/iw_handler.h> for details. Jean II */ 688 const struct iw_handler_def * wireless_handlers; 689 /* Instance data managed by the core of Wireless Extensions. */ 690 struct iw_public_data * wireless_data; 691 #endif 692 /* Management operations */ 693 const struct net_device_ops *netdev_ops; 694 const struct ethtool_ops *ethtool_ops; 695 696 /* Hardware header description */ 697 const struct header_ops *header_ops; 698 699 unsigned int flags; /* interface flags (a la BSD) */ 700 unsigned short gflags; 701 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 702 unsigned short padded; /* How much padding added by alloc_netdev() */ 703 704 unsigned char operstate; /* RFC2863 operstate */ 705 unsigned char link_mode; /* mapping policy to operstate */ 706 707 unsigned mtu; /* interface MTU value */ 708 unsigned short type; /* interface hardware type */ 709 unsigned short hard_header_len; /* hardware hdr length */ 710 711 /* extra head- and tailroom the hardware may need, but not in all cases 712 * can this be guaranteed, especially tailroom. Some cases also use 713 * LL_MAX_HEADER instead to allocate the skb. 714 */ 715 unsigned short needed_headroom; 716 unsigned short needed_tailroom; 717 718 struct net_device *master; /* Pointer to master device of a group, 719 * which this device is member of. 720 */ 721 722 /* Interface address info. */ 723 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 724 unsigned char addr_len; /* hardware address length */ 725 unsigned short dev_id; /* for shared network cards */ 726 727 spinlock_t addr_list_lock; 728 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ 729 int uc_count; /* Number of installed ucasts */ 730 int uc_promisc; 731 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 732 int mc_count; /* Number of installed mcasts */ 733 unsigned int promiscuity; 734 unsigned int allmulti; 735 736 737 /* Protocol specific pointers */ 738 739 #ifdef CONFIG_NET_DSA 740 void *dsa_ptr; /* dsa specific data */ 741 #endif 742 void *atalk_ptr; /* AppleTalk link */ 743 void *ip_ptr; /* IPv4 specific data */ 744 void *dn_ptr; /* DECnet specific data */ 745 void *ip6_ptr; /* IPv6 specific data */ 746 void *ec_ptr; /* Econet specific data */ 747 void *ax25_ptr; /* AX.25 specific data */ 748 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 749 assign before registering */ 750 751 /* 752 * Cache line mostly used on receive path (including eth_type_trans()) 753 */ 754 unsigned long last_rx; /* Time of last Rx */ 755 /* Interface address info used in eth_type_trans() */ 756 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast 757 because most packets are unicast) */ 758 759 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 760 761 struct netdev_queue rx_queue; 762 763 struct netdev_queue *_tx ____cacheline_aligned_in_smp; 764 765 /* Number of TX queues allocated at alloc_netdev_mq() time */ 766 unsigned int num_tx_queues; 767 768 /* Number of TX queues currently active in device */ 769 unsigned int real_num_tx_queues; 770 771 unsigned long tx_queue_len; /* Max frames per queue allowed */ 772 spinlock_t tx_global_lock; 773 /* 774 * One part is mostly used on xmit path (device) 775 */ 776 /* These may be needed for future network-power-down code. */ 777 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 778 779 int watchdog_timeo; /* used by dev_watchdog() */ 780 struct timer_list watchdog_timer; 781 782 /* Number of references to this device */ 783 atomic_t refcnt ____cacheline_aligned_in_smp; 784 785 /* delayed register/unregister */ 786 struct list_head todo_list; 787 /* device index hash chain */ 788 struct hlist_node index_hlist; 789 790 struct net_device *link_watch_next; 791 792 /* register/unregister state machine */ 793 enum { NETREG_UNINITIALIZED=0, 794 NETREG_REGISTERED, /* completed register_netdevice */ 795 NETREG_UNREGISTERING, /* called unregister_netdevice */ 796 NETREG_UNREGISTERED, /* completed unregister todo */ 797 NETREG_RELEASED, /* called free_netdev */ 798 } reg_state; 799 800 /* Called from unregister, can be used to call free_netdev */ 801 void (*destructor)(struct net_device *dev); 802 803 #ifdef CONFIG_NETPOLL 804 struct netpoll_info *npinfo; 805 #endif 806 807 #ifdef CONFIG_NET_NS 808 /* Network namespace this network device is inside */ 809 struct net *nd_net; 810 #endif 811 812 /* mid-layer private */ 813 void *ml_priv; 814 815 /* bridge stuff */ 816 struct net_bridge_port *br_port; 817 /* macvlan */ 818 struct macvlan_port *macvlan_port; 819 /* GARP */ 820 struct garp_port *garp_port; 821 822 /* class/net/name entry */ 823 struct device dev; 824 /* space for optional statistics and wireless sysfs groups */ 825 struct attribute_group *sysfs_groups[3]; 826 827 /* rtnetlink link ops */ 828 const struct rtnl_link_ops *rtnl_link_ops; 829 830 /* VLAN feature mask */ 831 unsigned long vlan_features; 832 833 /* for setting kernel sock attribute on TCP connection setup */ 834 #define GSO_MAX_SIZE 65536 835 unsigned int gso_max_size; 836 837 #ifdef CONFIG_DCB 838 /* Data Center Bridging netlink ops */ 839 struct dcbnl_rtnl_ops *dcbnl_ops; 840 #endif 841 842 #ifdef CONFIG_COMPAT_NET_DEV_OPS 843 struct { 844 int (*init)(struct net_device *dev); 845 void (*uninit)(struct net_device *dev); 846 int (*open)(struct net_device *dev); 847 int (*stop)(struct net_device *dev); 848 int (*hard_start_xmit) (struct sk_buff *skb, 849 struct net_device *dev); 850 u16 (*select_queue)(struct net_device *dev, 851 struct sk_buff *skb); 852 void (*change_rx_flags)(struct net_device *dev, 853 int flags); 854 void (*set_rx_mode)(struct net_device *dev); 855 void (*set_multicast_list)(struct net_device *dev); 856 int (*set_mac_address)(struct net_device *dev, 857 void *addr); 858 int (*validate_addr)(struct net_device *dev); 859 int (*do_ioctl)(struct net_device *dev, 860 struct ifreq *ifr, int cmd); 861 int (*set_config)(struct net_device *dev, 862 struct ifmap *map); 863 int (*change_mtu)(struct net_device *dev, int new_mtu); 864 int (*neigh_setup)(struct net_device *dev, 865 struct neigh_parms *); 866 void (*tx_timeout) (struct net_device *dev); 867 struct net_device_stats* (*get_stats)(struct net_device *dev); 868 void (*vlan_rx_register)(struct net_device *dev, 869 struct vlan_group *grp); 870 void (*vlan_rx_add_vid)(struct net_device *dev, 871 unsigned short vid); 872 void (*vlan_rx_kill_vid)(struct net_device *dev, 873 unsigned short vid); 874 #ifdef CONFIG_NET_POLL_CONTROLLER 875 void (*poll_controller)(struct net_device *dev); 876 #endif 877 }; 878 #endif 879 }; 880 #define to_net_dev(d) container_of(d, struct net_device, dev) 881 882 #define NETDEV_ALIGN 32 883 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) 884 885 static inline 886 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, 887 unsigned int index) 888 { 889 return &dev->_tx[index]; 890 } 891 892 static inline void netdev_for_each_tx_queue(struct net_device *dev, 893 void (*f)(struct net_device *, 894 struct netdev_queue *, 895 void *), 896 void *arg) 897 { 898 unsigned int i; 899 900 for (i = 0; i < dev->num_tx_queues; i++) 901 f(dev, &dev->_tx[i], arg); 902 } 903 904 /* 905 * Net namespace inlines 906 */ 907 static inline 908 struct net *dev_net(const struct net_device *dev) 909 { 910 #ifdef CONFIG_NET_NS 911 return dev->nd_net; 912 #else 913 return &init_net; 914 #endif 915 } 916 917 static inline 918 void dev_net_set(struct net_device *dev, struct net *net) 919 { 920 #ifdef CONFIG_NET_NS 921 release_net(dev->nd_net); 922 dev->nd_net = hold_net(net); 923 #endif 924 } 925 926 static inline bool netdev_uses_dsa_tags(struct net_device *dev) 927 { 928 #ifdef CONFIG_NET_DSA_TAG_DSA 929 if (dev->dsa_ptr != NULL) 930 return dsa_uses_dsa_tags(dev->dsa_ptr); 931 #endif 932 933 return 0; 934 } 935 936 static inline bool netdev_uses_trailer_tags(struct net_device *dev) 937 { 938 #ifdef CONFIG_NET_DSA_TAG_TRAILER 939 if (dev->dsa_ptr != NULL) 940 return dsa_uses_trailer_tags(dev->dsa_ptr); 941 #endif 942 943 return 0; 944 } 945 946 /** 947 * netdev_priv - access network device private data 948 * @dev: network device 949 * 950 * Get network device private data 951 */ 952 static inline void *netdev_priv(const struct net_device *dev) 953 { 954 return (char *)dev + ((sizeof(struct net_device) 955 + NETDEV_ALIGN_CONST) 956 & ~NETDEV_ALIGN_CONST); 957 } 958 959 /* Set the sysfs physical device reference for the network logical device 960 * if set prior to registration will cause a symlink during initialization. 961 */ 962 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 963 964 /** 965 * netif_napi_add - initialize a napi context 966 * @dev: network device 967 * @napi: napi context 968 * @poll: polling function 969 * @weight: default weight 970 * 971 * netif_napi_add() must be used to initialize a napi context prior to calling 972 * *any* of the other napi related functions. 973 */ 974 void netif_napi_add(struct net_device *dev, struct napi_struct *napi, 975 int (*poll)(struct napi_struct *, int), int weight); 976 977 /** 978 * netif_napi_del - remove a napi context 979 * @napi: napi context 980 * 981 * netif_napi_del() removes a napi context from the network device napi list 982 */ 983 void netif_napi_del(struct napi_struct *napi); 984 985 struct napi_gro_cb { 986 /* This is non-zero if the packet may be of the same flow. */ 987 int same_flow; 988 989 /* This is non-zero if the packet cannot be merged with the new skb. */ 990 int flush; 991 992 /* Number of segments aggregated. */ 993 int count; 994 995 /* Free the skb? */ 996 int free; 997 }; 998 999 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) 1000 1001 struct packet_type { 1002 __be16 type; /* This is really htons(ether_type). */ 1003 struct net_device *dev; /* NULL is wildcarded here */ 1004 int (*func) (struct sk_buff *, 1005 struct net_device *, 1006 struct packet_type *, 1007 struct net_device *); 1008 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 1009 int features); 1010 int (*gso_send_check)(struct sk_buff *skb); 1011 struct sk_buff **(*gro_receive)(struct sk_buff **head, 1012 struct sk_buff *skb); 1013 int (*gro_complete)(struct sk_buff *skb); 1014 void *af_packet_priv; 1015 struct list_head list; 1016 }; 1017 1018 struct napi_gro_fraginfo { 1019 skb_frag_t frags[MAX_SKB_FRAGS]; 1020 unsigned int nr_frags; 1021 unsigned int ip_summed; 1022 unsigned int len; 1023 __wsum csum; 1024 }; 1025 1026 #include <linux/interrupt.h> 1027 #include <linux/notifier.h> 1028 1029 extern rwlock_t dev_base_lock; /* Device list lock */ 1030 1031 1032 #define for_each_netdev(net, d) \ 1033 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 1034 #define for_each_netdev_safe(net, d, n) \ 1035 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 1036 #define for_each_netdev_continue(net, d) \ 1037 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 1038 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 1039 1040 static inline struct net_device *next_net_device(struct net_device *dev) 1041 { 1042 struct list_head *lh; 1043 struct net *net; 1044 1045 net = dev_net(dev); 1046 lh = dev->dev_list.next; 1047 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 1048 } 1049 1050 static inline struct net_device *first_net_device(struct net *net) 1051 { 1052 return list_empty(&net->dev_base_head) ? NULL : 1053 net_device_entry(net->dev_base_head.next); 1054 } 1055 1056 extern int netdev_boot_setup_check(struct net_device *dev); 1057 extern unsigned long netdev_boot_base(const char *prefix, int unit); 1058 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 1059 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 1060 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 1061 extern void dev_add_pack(struct packet_type *pt); 1062 extern void dev_remove_pack(struct packet_type *pt); 1063 extern void __dev_remove_pack(struct packet_type *pt); 1064 1065 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 1066 unsigned short mask); 1067 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 1068 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 1069 extern int dev_alloc_name(struct net_device *dev, const char *name); 1070 extern int dev_open(struct net_device *dev); 1071 extern int dev_close(struct net_device *dev); 1072 extern void dev_disable_lro(struct net_device *dev); 1073 extern int dev_queue_xmit(struct sk_buff *skb); 1074 extern int register_netdevice(struct net_device *dev); 1075 extern void unregister_netdevice(struct net_device *dev); 1076 extern void free_netdev(struct net_device *dev); 1077 extern void synchronize_net(void); 1078 extern int register_netdevice_notifier(struct notifier_block *nb); 1079 extern int unregister_netdevice_notifier(struct notifier_block *nb); 1080 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 1081 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 1082 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 1083 extern int dev_restart(struct net_device *dev); 1084 #ifdef CONFIG_NETPOLL_TRAP 1085 extern int netpoll_trap(void); 1086 #endif 1087 1088 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 1089 unsigned short type, 1090 const void *daddr, const void *saddr, 1091 unsigned len) 1092 { 1093 if (!dev->header_ops || !dev->header_ops->create) 1094 return 0; 1095 1096 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 1097 } 1098 1099 static inline int dev_parse_header(const struct sk_buff *skb, 1100 unsigned char *haddr) 1101 { 1102 const struct net_device *dev = skb->dev; 1103 1104 if (!dev->header_ops || !dev->header_ops->parse) 1105 return 0; 1106 return dev->header_ops->parse(skb, haddr); 1107 } 1108 1109 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 1110 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 1111 static inline int unregister_gifconf(unsigned int family) 1112 { 1113 return register_gifconf(family, NULL); 1114 } 1115 1116 /* 1117 * Incoming packets are placed on per-cpu queues so that 1118 * no locking is needed. 1119 */ 1120 struct softnet_data 1121 { 1122 struct Qdisc *output_queue; 1123 struct sk_buff_head input_pkt_queue; 1124 struct list_head poll_list; 1125 struct sk_buff *completion_queue; 1126 1127 struct napi_struct backlog; 1128 }; 1129 1130 DECLARE_PER_CPU(struct softnet_data,softnet_data); 1131 1132 #define HAVE_NETIF_QUEUE 1133 1134 extern void __netif_schedule(struct Qdisc *q); 1135 1136 static inline void netif_schedule_queue(struct netdev_queue *txq) 1137 { 1138 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1139 __netif_schedule(txq->qdisc); 1140 } 1141 1142 static inline void netif_tx_schedule_all(struct net_device *dev) 1143 { 1144 unsigned int i; 1145 1146 for (i = 0; i < dev->num_tx_queues; i++) 1147 netif_schedule_queue(netdev_get_tx_queue(dev, i)); 1148 } 1149 1150 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) 1151 { 1152 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1153 } 1154 1155 /** 1156 * netif_start_queue - allow transmit 1157 * @dev: network device 1158 * 1159 * Allow upper layers to call the device hard_start_xmit routine. 1160 */ 1161 static inline void netif_start_queue(struct net_device *dev) 1162 { 1163 netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); 1164 } 1165 1166 static inline void netif_tx_start_all_queues(struct net_device *dev) 1167 { 1168 unsigned int i; 1169 1170 for (i = 0; i < dev->num_tx_queues; i++) { 1171 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1172 netif_tx_start_queue(txq); 1173 } 1174 } 1175 1176 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) 1177 { 1178 #ifdef CONFIG_NETPOLL_TRAP 1179 if (netpoll_trap()) { 1180 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1181 return; 1182 } 1183 #endif 1184 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) 1185 __netif_schedule(dev_queue->qdisc); 1186 } 1187 1188 /** 1189 * netif_wake_queue - restart transmit 1190 * @dev: network device 1191 * 1192 * Allow upper layers to call the device hard_start_xmit routine. 1193 * Used for flow control when transmit resources are available. 1194 */ 1195 static inline void netif_wake_queue(struct net_device *dev) 1196 { 1197 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); 1198 } 1199 1200 static inline void netif_tx_wake_all_queues(struct net_device *dev) 1201 { 1202 unsigned int i; 1203 1204 for (i = 0; i < dev->num_tx_queues; i++) { 1205 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1206 netif_tx_wake_queue(txq); 1207 } 1208 } 1209 1210 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) 1211 { 1212 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1213 } 1214 1215 /** 1216 * netif_stop_queue - stop transmitted packets 1217 * @dev: network device 1218 * 1219 * Stop upper layers calling the device hard_start_xmit routine. 1220 * Used for flow control when transmit resources are unavailable. 1221 */ 1222 static inline void netif_stop_queue(struct net_device *dev) 1223 { 1224 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); 1225 } 1226 1227 static inline void netif_tx_stop_all_queues(struct net_device *dev) 1228 { 1229 unsigned int i; 1230 1231 for (i = 0; i < dev->num_tx_queues; i++) { 1232 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1233 netif_tx_stop_queue(txq); 1234 } 1235 } 1236 1237 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) 1238 { 1239 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1240 } 1241 1242 /** 1243 * netif_queue_stopped - test if transmit queue is flowblocked 1244 * @dev: network device 1245 * 1246 * Test if transmit queue on device is currently unable to send. 1247 */ 1248 static inline int netif_queue_stopped(const struct net_device *dev) 1249 { 1250 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); 1251 } 1252 1253 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) 1254 { 1255 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); 1256 } 1257 1258 /** 1259 * netif_running - test if up 1260 * @dev: network device 1261 * 1262 * Test if the device has been brought up. 1263 */ 1264 static inline int netif_running(const struct net_device *dev) 1265 { 1266 return test_bit(__LINK_STATE_START, &dev->state); 1267 } 1268 1269 /* 1270 * Routines to manage the subqueues on a device. We only need start 1271 * stop, and a check if it's stopped. All other device management is 1272 * done at the overall netdevice level. 1273 * Also test the device if we're multiqueue. 1274 */ 1275 1276 /** 1277 * netif_start_subqueue - allow sending packets on subqueue 1278 * @dev: network device 1279 * @queue_index: sub queue index 1280 * 1281 * Start individual transmit queue of a device with multiple transmit queues. 1282 */ 1283 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1284 { 1285 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1286 clear_bit(__QUEUE_STATE_XOFF, &txq->state); 1287 } 1288 1289 /** 1290 * netif_stop_subqueue - stop sending packets on subqueue 1291 * @dev: network device 1292 * @queue_index: sub queue index 1293 * 1294 * Stop individual transmit queue of a device with multiple transmit queues. 1295 */ 1296 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1297 { 1298 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1299 #ifdef CONFIG_NETPOLL_TRAP 1300 if (netpoll_trap()) 1301 return; 1302 #endif 1303 set_bit(__QUEUE_STATE_XOFF, &txq->state); 1304 } 1305 1306 /** 1307 * netif_subqueue_stopped - test status of subqueue 1308 * @dev: network device 1309 * @queue_index: sub queue index 1310 * 1311 * Check individual transmit queue of a device with multiple transmit queues. 1312 */ 1313 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1314 u16 queue_index) 1315 { 1316 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1317 return test_bit(__QUEUE_STATE_XOFF, &txq->state); 1318 } 1319 1320 static inline int netif_subqueue_stopped(const struct net_device *dev, 1321 struct sk_buff *skb) 1322 { 1323 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1324 } 1325 1326 /** 1327 * netif_wake_subqueue - allow sending packets on subqueue 1328 * @dev: network device 1329 * @queue_index: sub queue index 1330 * 1331 * Resume individual transmit queue of a device with multiple transmit queues. 1332 */ 1333 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1334 { 1335 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1336 #ifdef CONFIG_NETPOLL_TRAP 1337 if (netpoll_trap()) 1338 return; 1339 #endif 1340 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) 1341 __netif_schedule(txq->qdisc); 1342 } 1343 1344 /** 1345 * netif_is_multiqueue - test if device has multiple transmit queues 1346 * @dev: network device 1347 * 1348 * Check if device has multiple transmit queues 1349 */ 1350 static inline int netif_is_multiqueue(const struct net_device *dev) 1351 { 1352 return (dev->num_tx_queues > 1); 1353 } 1354 1355 /* Use this variant when it is known for sure that it 1356 * is executing from hardware interrupt context or with hardware interrupts 1357 * disabled. 1358 */ 1359 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1360 1361 /* Use this variant in places where it could be invoked 1362 * from either hardware interrupt or other context, with hardware interrupts 1363 * either disabled or enabled. 1364 */ 1365 extern void dev_kfree_skb_any(struct sk_buff *skb); 1366 1367 #define HAVE_NETIF_RX 1 1368 extern int netif_rx(struct sk_buff *skb); 1369 extern int netif_rx_ni(struct sk_buff *skb); 1370 #define HAVE_NETIF_RECEIVE_SKB 1 1371 extern int netif_receive_skb(struct sk_buff *skb); 1372 extern void napi_gro_flush(struct napi_struct *napi); 1373 extern int dev_gro_receive(struct napi_struct *napi, 1374 struct sk_buff *skb); 1375 extern int napi_gro_receive(struct napi_struct *napi, 1376 struct sk_buff *skb); 1377 extern void napi_reuse_skb(struct napi_struct *napi, 1378 struct sk_buff *skb); 1379 extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi, 1380 struct napi_gro_fraginfo *info); 1381 extern int napi_gro_frags(struct napi_struct *napi, 1382 struct napi_gro_fraginfo *info); 1383 extern void netif_nit_deliver(struct sk_buff *skb); 1384 extern int dev_valid_name(const char *name); 1385 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1386 extern int dev_ethtool(struct net *net, struct ifreq *); 1387 extern unsigned dev_get_flags(const struct net_device *); 1388 extern int dev_change_flags(struct net_device *, unsigned); 1389 extern int dev_change_name(struct net_device *, const char *); 1390 extern int dev_set_alias(struct net_device *, const char *, size_t); 1391 extern int dev_change_net_namespace(struct net_device *, 1392 struct net *, const char *); 1393 extern int dev_set_mtu(struct net_device *, int); 1394 extern int dev_set_mac_address(struct net_device *, 1395 struct sockaddr *); 1396 extern int dev_hard_start_xmit(struct sk_buff *skb, 1397 struct net_device *dev, 1398 struct netdev_queue *txq); 1399 1400 extern int netdev_budget; 1401 1402 /* Called by rtnetlink.c:rtnl_unlock() */ 1403 extern void netdev_run_todo(void); 1404 1405 /** 1406 * dev_put - release reference to device 1407 * @dev: network device 1408 * 1409 * Release reference to device to allow it to be freed. 1410 */ 1411 static inline void dev_put(struct net_device *dev) 1412 { 1413 atomic_dec(&dev->refcnt); 1414 } 1415 1416 /** 1417 * dev_hold - get reference to device 1418 * @dev: network device 1419 * 1420 * Hold reference to device to keep it from being freed. 1421 */ 1422 static inline void dev_hold(struct net_device *dev) 1423 { 1424 atomic_inc(&dev->refcnt); 1425 } 1426 1427 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1428 * and _off may be called from IRQ context, but it is caller 1429 * who is responsible for serialization of these calls. 1430 * 1431 * The name carrier is inappropriate, these functions should really be 1432 * called netif_lowerlayer_*() because they represent the state of any 1433 * kind of lower layer not just hardware media. 1434 */ 1435 1436 extern void linkwatch_fire_event(struct net_device *dev); 1437 1438 /** 1439 * netif_carrier_ok - test if carrier present 1440 * @dev: network device 1441 * 1442 * Check if carrier is present on device 1443 */ 1444 static inline int netif_carrier_ok(const struct net_device *dev) 1445 { 1446 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1447 } 1448 1449 extern void __netdev_watchdog_up(struct net_device *dev); 1450 1451 extern void netif_carrier_on(struct net_device *dev); 1452 1453 extern void netif_carrier_off(struct net_device *dev); 1454 1455 /** 1456 * netif_dormant_on - mark device as dormant. 1457 * @dev: network device 1458 * 1459 * Mark device as dormant (as per RFC2863). 1460 * 1461 * The dormant state indicates that the relevant interface is not 1462 * actually in a condition to pass packets (i.e., it is not 'up') but is 1463 * in a "pending" state, waiting for some external event. For "on- 1464 * demand" interfaces, this new state identifies the situation where the 1465 * interface is waiting for events to place it in the up state. 1466 * 1467 */ 1468 static inline void netif_dormant_on(struct net_device *dev) 1469 { 1470 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1471 linkwatch_fire_event(dev); 1472 } 1473 1474 /** 1475 * netif_dormant_off - set device as not dormant. 1476 * @dev: network device 1477 * 1478 * Device is not in dormant state. 1479 */ 1480 static inline void netif_dormant_off(struct net_device *dev) 1481 { 1482 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1483 linkwatch_fire_event(dev); 1484 } 1485 1486 /** 1487 * netif_dormant - test if carrier present 1488 * @dev: network device 1489 * 1490 * Check if carrier is present on device 1491 */ 1492 static inline int netif_dormant(const struct net_device *dev) 1493 { 1494 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1495 } 1496 1497 1498 /** 1499 * netif_oper_up - test if device is operational 1500 * @dev: network device 1501 * 1502 * Check if carrier is operational 1503 */ 1504 static inline int netif_oper_up(const struct net_device *dev) { 1505 return (dev->operstate == IF_OPER_UP || 1506 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1507 } 1508 1509 /** 1510 * netif_device_present - is device available or removed 1511 * @dev: network device 1512 * 1513 * Check if device has not been removed from system. 1514 */ 1515 static inline int netif_device_present(struct net_device *dev) 1516 { 1517 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1518 } 1519 1520 extern void netif_device_detach(struct net_device *dev); 1521 1522 extern void netif_device_attach(struct net_device *dev); 1523 1524 /* 1525 * Network interface message level settings 1526 */ 1527 #define HAVE_NETIF_MSG 1 1528 1529 enum { 1530 NETIF_MSG_DRV = 0x0001, 1531 NETIF_MSG_PROBE = 0x0002, 1532 NETIF_MSG_LINK = 0x0004, 1533 NETIF_MSG_TIMER = 0x0008, 1534 NETIF_MSG_IFDOWN = 0x0010, 1535 NETIF_MSG_IFUP = 0x0020, 1536 NETIF_MSG_RX_ERR = 0x0040, 1537 NETIF_MSG_TX_ERR = 0x0080, 1538 NETIF_MSG_TX_QUEUED = 0x0100, 1539 NETIF_MSG_INTR = 0x0200, 1540 NETIF_MSG_TX_DONE = 0x0400, 1541 NETIF_MSG_RX_STATUS = 0x0800, 1542 NETIF_MSG_PKTDATA = 0x1000, 1543 NETIF_MSG_HW = 0x2000, 1544 NETIF_MSG_WOL = 0x4000, 1545 }; 1546 1547 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1548 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1549 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1550 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1551 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1552 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1553 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1554 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1555 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1556 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1557 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1558 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1559 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1560 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1561 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1562 1563 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1564 { 1565 /* use default */ 1566 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1567 return default_msg_enable_bits; 1568 if (debug_value == 0) /* no output */ 1569 return 0; 1570 /* set low N bits */ 1571 return (1 << debug_value) - 1; 1572 } 1573 1574 /* Test if receive needs to be scheduled but only if up */ 1575 static inline int netif_rx_schedule_prep(struct napi_struct *napi) 1576 { 1577 return napi_schedule_prep(napi); 1578 } 1579 1580 /* Add interface to tail of rx poll list. This assumes that _prep has 1581 * already been called and returned 1. 1582 */ 1583 static inline void __netif_rx_schedule(struct napi_struct *napi) 1584 { 1585 __napi_schedule(napi); 1586 } 1587 1588 /* Try to reschedule poll. Called by irq handler. */ 1589 1590 static inline void netif_rx_schedule(struct napi_struct *napi) 1591 { 1592 if (netif_rx_schedule_prep(napi)) 1593 __netif_rx_schedule(napi); 1594 } 1595 1596 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ 1597 static inline int netif_rx_reschedule(struct napi_struct *napi) 1598 { 1599 if (napi_schedule_prep(napi)) { 1600 __netif_rx_schedule(napi); 1601 return 1; 1602 } 1603 return 0; 1604 } 1605 1606 /* same as netif_rx_complete, except that local_irq_save(flags) 1607 * has already been issued 1608 */ 1609 static inline void __netif_rx_complete(struct napi_struct *napi) 1610 { 1611 __napi_complete(napi); 1612 } 1613 1614 /* Remove interface from poll list: it must be in the poll list 1615 * on current cpu. This primitive is called by dev->poll(), when 1616 * it completes the work. The device cannot be out of poll list at this 1617 * moment, it is BUG(). 1618 */ 1619 static inline void netif_rx_complete(struct napi_struct *napi) 1620 { 1621 napi_complete(napi); 1622 } 1623 1624 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) 1625 { 1626 spin_lock(&txq->_xmit_lock); 1627 txq->xmit_lock_owner = cpu; 1628 } 1629 1630 static inline void __netif_tx_lock_bh(struct netdev_queue *txq) 1631 { 1632 spin_lock_bh(&txq->_xmit_lock); 1633 txq->xmit_lock_owner = smp_processor_id(); 1634 } 1635 1636 static inline int __netif_tx_trylock(struct netdev_queue *txq) 1637 { 1638 int ok = spin_trylock(&txq->_xmit_lock); 1639 if (likely(ok)) 1640 txq->xmit_lock_owner = smp_processor_id(); 1641 return ok; 1642 } 1643 1644 static inline void __netif_tx_unlock(struct netdev_queue *txq) 1645 { 1646 txq->xmit_lock_owner = -1; 1647 spin_unlock(&txq->_xmit_lock); 1648 } 1649 1650 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) 1651 { 1652 txq->xmit_lock_owner = -1; 1653 spin_unlock_bh(&txq->_xmit_lock); 1654 } 1655 1656 /** 1657 * netif_tx_lock - grab network device transmit lock 1658 * @dev: network device 1659 * 1660 * Get network device transmit lock 1661 */ 1662 static inline void netif_tx_lock(struct net_device *dev) 1663 { 1664 unsigned int i; 1665 int cpu; 1666 1667 spin_lock(&dev->tx_global_lock); 1668 cpu = smp_processor_id(); 1669 for (i = 0; i < dev->num_tx_queues; i++) { 1670 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1671 1672 /* We are the only thread of execution doing a 1673 * freeze, but we have to grab the _xmit_lock in 1674 * order to synchronize with threads which are in 1675 * the ->hard_start_xmit() handler and already 1676 * checked the frozen bit. 1677 */ 1678 __netif_tx_lock(txq, cpu); 1679 set_bit(__QUEUE_STATE_FROZEN, &txq->state); 1680 __netif_tx_unlock(txq); 1681 } 1682 } 1683 1684 static inline void netif_tx_lock_bh(struct net_device *dev) 1685 { 1686 local_bh_disable(); 1687 netif_tx_lock(dev); 1688 } 1689 1690 static inline void netif_tx_unlock(struct net_device *dev) 1691 { 1692 unsigned int i; 1693 1694 for (i = 0; i < dev->num_tx_queues; i++) { 1695 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1696 1697 /* No need to grab the _xmit_lock here. If the 1698 * queue is not stopped for another reason, we 1699 * force a schedule. 1700 */ 1701 clear_bit(__QUEUE_STATE_FROZEN, &txq->state); 1702 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1703 __netif_schedule(txq->qdisc); 1704 } 1705 spin_unlock(&dev->tx_global_lock); 1706 } 1707 1708 static inline void netif_tx_unlock_bh(struct net_device *dev) 1709 { 1710 netif_tx_unlock(dev); 1711 local_bh_enable(); 1712 } 1713 1714 #define HARD_TX_LOCK(dev, txq, cpu) { \ 1715 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1716 __netif_tx_lock(txq, cpu); \ 1717 } \ 1718 } 1719 1720 #define HARD_TX_UNLOCK(dev, txq) { \ 1721 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1722 __netif_tx_unlock(txq); \ 1723 } \ 1724 } 1725 1726 static inline void netif_tx_disable(struct net_device *dev) 1727 { 1728 unsigned int i; 1729 int cpu; 1730 1731 local_bh_disable(); 1732 cpu = smp_processor_id(); 1733 for (i = 0; i < dev->num_tx_queues; i++) { 1734 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1735 1736 __netif_tx_lock(txq, cpu); 1737 netif_tx_stop_queue(txq); 1738 __netif_tx_unlock(txq); 1739 } 1740 local_bh_enable(); 1741 } 1742 1743 static inline void netif_addr_lock(struct net_device *dev) 1744 { 1745 spin_lock(&dev->addr_list_lock); 1746 } 1747 1748 static inline void netif_addr_lock_bh(struct net_device *dev) 1749 { 1750 spin_lock_bh(&dev->addr_list_lock); 1751 } 1752 1753 static inline void netif_addr_unlock(struct net_device *dev) 1754 { 1755 spin_unlock(&dev->addr_list_lock); 1756 } 1757 1758 static inline void netif_addr_unlock_bh(struct net_device *dev) 1759 { 1760 spin_unlock_bh(&dev->addr_list_lock); 1761 } 1762 1763 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1764 1765 extern void ether_setup(struct net_device *dev); 1766 1767 /* Support for loadable net-drivers */ 1768 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1769 void (*setup)(struct net_device *), 1770 unsigned int queue_count); 1771 #define alloc_netdev(sizeof_priv, name, setup) \ 1772 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1773 extern int register_netdev(struct net_device *dev); 1774 extern void unregister_netdev(struct net_device *dev); 1775 /* Functions used for secondary unicast and multicast support */ 1776 extern void dev_set_rx_mode(struct net_device *dev); 1777 extern void __dev_set_rx_mode(struct net_device *dev); 1778 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); 1779 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); 1780 extern int dev_unicast_sync(struct net_device *to, struct net_device *from); 1781 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); 1782 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1783 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1784 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1785 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1786 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1787 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1788 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1789 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1790 extern int dev_set_promiscuity(struct net_device *dev, int inc); 1791 extern int dev_set_allmulti(struct net_device *dev, int inc); 1792 extern void netdev_state_change(struct net_device *dev); 1793 extern void netdev_bonding_change(struct net_device *dev); 1794 extern void netdev_features_change(struct net_device *dev); 1795 /* Load a device via the kmod */ 1796 extern void dev_load(struct net *net, const char *name); 1797 extern void dev_mcast_init(void); 1798 extern const struct net_device_stats *dev_get_stats(struct net_device *dev); 1799 1800 extern int netdev_max_backlog; 1801 extern int weight_p; 1802 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1803 extern int skb_checksum_help(struct sk_buff *skb); 1804 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1805 #ifdef CONFIG_BUG 1806 extern void netdev_rx_csum_fault(struct net_device *dev); 1807 #else 1808 static inline void netdev_rx_csum_fault(struct net_device *dev) 1809 { 1810 } 1811 #endif 1812 /* rx skb timestamps */ 1813 extern void net_enable_timestamp(void); 1814 extern void net_disable_timestamp(void); 1815 1816 #ifdef CONFIG_PROC_FS 1817 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1818 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1819 extern void dev_seq_stop(struct seq_file *seq, void *v); 1820 #endif 1821 1822 extern int netdev_class_create_file(struct class_attribute *class_attr); 1823 extern void netdev_class_remove_file(struct class_attribute *class_attr); 1824 1825 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); 1826 1827 extern void linkwatch_run_queue(void); 1828 1829 unsigned long netdev_increment_features(unsigned long all, unsigned long one, 1830 unsigned long mask); 1831 unsigned long netdev_fix_features(unsigned long features, const char *name); 1832 1833 static inline int net_gso_ok(int features, int gso_type) 1834 { 1835 int feature = gso_type << NETIF_F_GSO_SHIFT; 1836 return (features & feature) == feature; 1837 } 1838 1839 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1840 { 1841 return net_gso_ok(features, skb_shinfo(skb)->gso_type); 1842 } 1843 1844 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1845 { 1846 return skb_is_gso(skb) && 1847 (!skb_gso_ok(skb, dev->features) || 1848 (skb_shinfo(skb)->frag_list && 1849 !(dev->features & NETIF_F_FRAGLIST)) || 1850 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1851 } 1852 1853 static inline void netif_set_gso_max_size(struct net_device *dev, 1854 unsigned int size) 1855 { 1856 dev->gso_max_size = size; 1857 } 1858 1859 /* On bonding slaves other than the currently active slave, suppress 1860 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1861 * ARP on active-backup slaves with arp_validate enabled. 1862 */ 1863 static inline int skb_bond_should_drop(struct sk_buff *skb) 1864 { 1865 struct net_device *dev = skb->dev; 1866 struct net_device *master = dev->master; 1867 1868 if (master) { 1869 if (master->priv_flags & IFF_MASTER_ARPMON) 1870 dev->last_rx = jiffies; 1871 1872 if (dev->priv_flags & IFF_SLAVE_INACTIVE) { 1873 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1874 skb->protocol == __constant_htons(ETH_P_ARP)) 1875 return 0; 1876 1877 if (master->priv_flags & IFF_MASTER_ALB) { 1878 if (skb->pkt_type != PACKET_BROADCAST && 1879 skb->pkt_type != PACKET_MULTICAST) 1880 return 0; 1881 } 1882 if (master->priv_flags & IFF_MASTER_8023AD && 1883 skb->protocol == __constant_htons(ETH_P_SLOW)) 1884 return 0; 1885 1886 return 1; 1887 } 1888 } 1889 return 0; 1890 } 1891 1892 extern struct pernet_operations __net_initdata loopback_net_ops; 1893 #endif /* __KERNEL__ */ 1894 1895 #endif /* _LINUX_DEV_H */ 1896