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_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 NETREG_DUMMY, /* dummy device for NAPI poll */ 799 } reg_state; 800 801 /* Called from unregister, can be used to call free_netdev */ 802 void (*destructor)(struct net_device *dev); 803 804 #ifdef CONFIG_NETPOLL 805 struct netpoll_info *npinfo; 806 #endif 807 808 #ifdef CONFIG_NET_NS 809 /* Network namespace this network device is inside */ 810 struct net *nd_net; 811 #endif 812 813 /* mid-layer private */ 814 void *ml_priv; 815 816 /* bridge stuff */ 817 struct net_bridge_port *br_port; 818 /* macvlan */ 819 struct macvlan_port *macvlan_port; 820 /* GARP */ 821 struct garp_port *garp_port; 822 823 /* class/net/name entry */ 824 struct device dev; 825 /* space for optional statistics and wireless sysfs groups */ 826 struct attribute_group *sysfs_groups[3]; 827 828 /* rtnetlink link ops */ 829 const struct rtnl_link_ops *rtnl_link_ops; 830 831 /* VLAN feature mask */ 832 unsigned long vlan_features; 833 834 /* for setting kernel sock attribute on TCP connection setup */ 835 #define GSO_MAX_SIZE 65536 836 unsigned int gso_max_size; 837 838 #ifdef CONFIG_DCB 839 /* Data Center Bridging netlink ops */ 840 struct dcbnl_rtnl_ops *dcbnl_ops; 841 #endif 842 843 #ifdef CONFIG_COMPAT_NET_DEV_OPS 844 struct { 845 int (*init)(struct net_device *dev); 846 void (*uninit)(struct net_device *dev); 847 int (*open)(struct net_device *dev); 848 int (*stop)(struct net_device *dev); 849 int (*hard_start_xmit) (struct sk_buff *skb, 850 struct net_device *dev); 851 u16 (*select_queue)(struct net_device *dev, 852 struct sk_buff *skb); 853 void (*change_rx_flags)(struct net_device *dev, 854 int flags); 855 void (*set_rx_mode)(struct net_device *dev); 856 void (*set_multicast_list)(struct net_device *dev); 857 int (*set_mac_address)(struct net_device *dev, 858 void *addr); 859 int (*validate_addr)(struct net_device *dev); 860 int (*do_ioctl)(struct net_device *dev, 861 struct ifreq *ifr, int cmd); 862 int (*set_config)(struct net_device *dev, 863 struct ifmap *map); 864 int (*change_mtu)(struct net_device *dev, int new_mtu); 865 int (*neigh_setup)(struct net_device *dev, 866 struct neigh_parms *); 867 void (*tx_timeout) (struct net_device *dev); 868 struct net_device_stats* (*get_stats)(struct net_device *dev); 869 void (*vlan_rx_register)(struct net_device *dev, 870 struct vlan_group *grp); 871 void (*vlan_rx_add_vid)(struct net_device *dev, 872 unsigned short vid); 873 void (*vlan_rx_kill_vid)(struct net_device *dev, 874 unsigned short vid); 875 #ifdef CONFIG_NET_POLL_CONTROLLER 876 void (*poll_controller)(struct net_device *dev); 877 #endif 878 }; 879 #endif 880 }; 881 #define to_net_dev(d) container_of(d, struct net_device, dev) 882 883 #define NETDEV_ALIGN 32 884 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) 885 886 static inline 887 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, 888 unsigned int index) 889 { 890 return &dev->_tx[index]; 891 } 892 893 static inline void netdev_for_each_tx_queue(struct net_device *dev, 894 void (*f)(struct net_device *, 895 struct netdev_queue *, 896 void *), 897 void *arg) 898 { 899 unsigned int i; 900 901 for (i = 0; i < dev->num_tx_queues; i++) 902 f(dev, &dev->_tx[i], arg); 903 } 904 905 /* 906 * Net namespace inlines 907 */ 908 static inline 909 struct net *dev_net(const struct net_device *dev) 910 { 911 #ifdef CONFIG_NET_NS 912 return dev->nd_net; 913 #else 914 return &init_net; 915 #endif 916 } 917 918 static inline 919 void dev_net_set(struct net_device *dev, struct net *net) 920 { 921 #ifdef CONFIG_NET_NS 922 release_net(dev->nd_net); 923 dev->nd_net = hold_net(net); 924 #endif 925 } 926 927 static inline bool netdev_uses_dsa_tags(struct net_device *dev) 928 { 929 #ifdef CONFIG_NET_DSA_TAG_DSA 930 if (dev->dsa_ptr != NULL) 931 return dsa_uses_dsa_tags(dev->dsa_ptr); 932 #endif 933 934 return 0; 935 } 936 937 static inline bool netdev_uses_trailer_tags(struct net_device *dev) 938 { 939 #ifdef CONFIG_NET_DSA_TAG_TRAILER 940 if (dev->dsa_ptr != NULL) 941 return dsa_uses_trailer_tags(dev->dsa_ptr); 942 #endif 943 944 return 0; 945 } 946 947 /** 948 * netdev_priv - access network device private data 949 * @dev: network device 950 * 951 * Get network device private data 952 */ 953 static inline void *netdev_priv(const struct net_device *dev) 954 { 955 return (char *)dev + ((sizeof(struct net_device) 956 + NETDEV_ALIGN_CONST) 957 & ~NETDEV_ALIGN_CONST); 958 } 959 960 /* Set the sysfs physical device reference for the network logical device 961 * if set prior to registration will cause a symlink during initialization. 962 */ 963 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 964 965 /** 966 * netif_napi_add - initialize a napi context 967 * @dev: network device 968 * @napi: napi context 969 * @poll: polling function 970 * @weight: default weight 971 * 972 * netif_napi_add() must be used to initialize a napi context prior to calling 973 * *any* of the other napi related functions. 974 */ 975 void netif_napi_add(struct net_device *dev, struct napi_struct *napi, 976 int (*poll)(struct napi_struct *, int), int weight); 977 978 /** 979 * netif_napi_del - remove a napi context 980 * @napi: napi context 981 * 982 * netif_napi_del() removes a napi context from the network device napi list 983 */ 984 void netif_napi_del(struct napi_struct *napi); 985 986 struct napi_gro_cb { 987 /* This is non-zero if the packet may be of the same flow. */ 988 int same_flow; 989 990 /* This is non-zero if the packet cannot be merged with the new skb. */ 991 int flush; 992 993 /* Number of segments aggregated. */ 994 int count; 995 996 /* Free the skb? */ 997 int free; 998 }; 999 1000 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) 1001 1002 struct packet_type { 1003 __be16 type; /* This is really htons(ether_type). */ 1004 struct net_device *dev; /* NULL is wildcarded here */ 1005 int (*func) (struct sk_buff *, 1006 struct net_device *, 1007 struct packet_type *, 1008 struct net_device *); 1009 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 1010 int features); 1011 int (*gso_send_check)(struct sk_buff *skb); 1012 struct sk_buff **(*gro_receive)(struct sk_buff **head, 1013 struct sk_buff *skb); 1014 int (*gro_complete)(struct sk_buff *skb); 1015 void *af_packet_priv; 1016 struct list_head list; 1017 }; 1018 1019 struct napi_gro_fraginfo { 1020 skb_frag_t frags[MAX_SKB_FRAGS]; 1021 unsigned int nr_frags; 1022 unsigned int ip_summed; 1023 unsigned int len; 1024 __wsum csum; 1025 }; 1026 1027 #include <linux/interrupt.h> 1028 #include <linux/notifier.h> 1029 1030 extern rwlock_t dev_base_lock; /* Device list lock */ 1031 1032 1033 #define for_each_netdev(net, d) \ 1034 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 1035 #define for_each_netdev_safe(net, d, n) \ 1036 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 1037 #define for_each_netdev_continue(net, d) \ 1038 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 1039 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 1040 1041 static inline struct net_device *next_net_device(struct net_device *dev) 1042 { 1043 struct list_head *lh; 1044 struct net *net; 1045 1046 net = dev_net(dev); 1047 lh = dev->dev_list.next; 1048 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 1049 } 1050 1051 static inline struct net_device *first_net_device(struct net *net) 1052 { 1053 return list_empty(&net->dev_base_head) ? NULL : 1054 net_device_entry(net->dev_base_head.next); 1055 } 1056 1057 extern int netdev_boot_setup_check(struct net_device *dev); 1058 extern unsigned long netdev_boot_base(const char *prefix, int unit); 1059 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 1060 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 1061 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 1062 extern void dev_add_pack(struct packet_type *pt); 1063 extern void dev_remove_pack(struct packet_type *pt); 1064 extern void __dev_remove_pack(struct packet_type *pt); 1065 1066 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 1067 unsigned short mask); 1068 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 1069 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 1070 extern int dev_alloc_name(struct net_device *dev, const char *name); 1071 extern int dev_open(struct net_device *dev); 1072 extern int dev_close(struct net_device *dev); 1073 extern void dev_disable_lro(struct net_device *dev); 1074 extern int dev_queue_xmit(struct sk_buff *skb); 1075 extern int register_netdevice(struct net_device *dev); 1076 extern void unregister_netdevice(struct net_device *dev); 1077 extern void free_netdev(struct net_device *dev); 1078 extern void synchronize_net(void); 1079 extern int register_netdevice_notifier(struct notifier_block *nb); 1080 extern int unregister_netdevice_notifier(struct notifier_block *nb); 1081 extern int init_dummy_netdev(struct net_device *dev); 1082 extern void netdev_resync_ops(struct net_device *dev); 1083 1084 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 1085 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 1086 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 1087 extern int dev_restart(struct net_device *dev); 1088 #ifdef CONFIG_NETPOLL_TRAP 1089 extern int netpoll_trap(void); 1090 #endif 1091 1092 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 1093 unsigned short type, 1094 const void *daddr, const void *saddr, 1095 unsigned len) 1096 { 1097 if (!dev->header_ops || !dev->header_ops->create) 1098 return 0; 1099 1100 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 1101 } 1102 1103 static inline int dev_parse_header(const struct sk_buff *skb, 1104 unsigned char *haddr) 1105 { 1106 const struct net_device *dev = skb->dev; 1107 1108 if (!dev->header_ops || !dev->header_ops->parse) 1109 return 0; 1110 return dev->header_ops->parse(skb, haddr); 1111 } 1112 1113 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 1114 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 1115 static inline int unregister_gifconf(unsigned int family) 1116 { 1117 return register_gifconf(family, NULL); 1118 } 1119 1120 /* 1121 * Incoming packets are placed on per-cpu queues so that 1122 * no locking is needed. 1123 */ 1124 struct softnet_data 1125 { 1126 struct Qdisc *output_queue; 1127 struct sk_buff_head input_pkt_queue; 1128 struct list_head poll_list; 1129 struct sk_buff *completion_queue; 1130 1131 struct napi_struct backlog; 1132 }; 1133 1134 DECLARE_PER_CPU(struct softnet_data,softnet_data); 1135 1136 #define HAVE_NETIF_QUEUE 1137 1138 extern void __netif_schedule(struct Qdisc *q); 1139 1140 static inline void netif_schedule_queue(struct netdev_queue *txq) 1141 { 1142 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1143 __netif_schedule(txq->qdisc); 1144 } 1145 1146 static inline void netif_tx_schedule_all(struct net_device *dev) 1147 { 1148 unsigned int i; 1149 1150 for (i = 0; i < dev->num_tx_queues; i++) 1151 netif_schedule_queue(netdev_get_tx_queue(dev, i)); 1152 } 1153 1154 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) 1155 { 1156 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1157 } 1158 1159 /** 1160 * netif_start_queue - allow transmit 1161 * @dev: network device 1162 * 1163 * Allow upper layers to call the device hard_start_xmit routine. 1164 */ 1165 static inline void netif_start_queue(struct net_device *dev) 1166 { 1167 netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); 1168 } 1169 1170 static inline void netif_tx_start_all_queues(struct net_device *dev) 1171 { 1172 unsigned int i; 1173 1174 for (i = 0; i < dev->num_tx_queues; i++) { 1175 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1176 netif_tx_start_queue(txq); 1177 } 1178 } 1179 1180 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) 1181 { 1182 #ifdef CONFIG_NETPOLL_TRAP 1183 if (netpoll_trap()) { 1184 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1185 return; 1186 } 1187 #endif 1188 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) 1189 __netif_schedule(dev_queue->qdisc); 1190 } 1191 1192 /** 1193 * netif_wake_queue - restart transmit 1194 * @dev: network device 1195 * 1196 * Allow upper layers to call the device hard_start_xmit routine. 1197 * Used for flow control when transmit resources are available. 1198 */ 1199 static inline void netif_wake_queue(struct net_device *dev) 1200 { 1201 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); 1202 } 1203 1204 static inline void netif_tx_wake_all_queues(struct net_device *dev) 1205 { 1206 unsigned int i; 1207 1208 for (i = 0; i < dev->num_tx_queues; i++) { 1209 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1210 netif_tx_wake_queue(txq); 1211 } 1212 } 1213 1214 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) 1215 { 1216 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1217 } 1218 1219 /** 1220 * netif_stop_queue - stop transmitted packets 1221 * @dev: network device 1222 * 1223 * Stop upper layers calling the device hard_start_xmit routine. 1224 * Used for flow control when transmit resources are unavailable. 1225 */ 1226 static inline void netif_stop_queue(struct net_device *dev) 1227 { 1228 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); 1229 } 1230 1231 static inline void netif_tx_stop_all_queues(struct net_device *dev) 1232 { 1233 unsigned int i; 1234 1235 for (i = 0; i < dev->num_tx_queues; i++) { 1236 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1237 netif_tx_stop_queue(txq); 1238 } 1239 } 1240 1241 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) 1242 { 1243 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1244 } 1245 1246 /** 1247 * netif_queue_stopped - test if transmit queue is flowblocked 1248 * @dev: network device 1249 * 1250 * Test if transmit queue on device is currently unable to send. 1251 */ 1252 static inline int netif_queue_stopped(const struct net_device *dev) 1253 { 1254 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); 1255 } 1256 1257 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) 1258 { 1259 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); 1260 } 1261 1262 /** 1263 * netif_running - test if up 1264 * @dev: network device 1265 * 1266 * Test if the device has been brought up. 1267 */ 1268 static inline int netif_running(const struct net_device *dev) 1269 { 1270 return test_bit(__LINK_STATE_START, &dev->state); 1271 } 1272 1273 /* 1274 * Routines to manage the subqueues on a device. We only need start 1275 * stop, and a check if it's stopped. All other device management is 1276 * done at the overall netdevice level. 1277 * Also test the device if we're multiqueue. 1278 */ 1279 1280 /** 1281 * netif_start_subqueue - allow sending packets on subqueue 1282 * @dev: network device 1283 * @queue_index: sub queue index 1284 * 1285 * Start individual transmit queue of a device with multiple transmit queues. 1286 */ 1287 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1288 { 1289 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1290 clear_bit(__QUEUE_STATE_XOFF, &txq->state); 1291 } 1292 1293 /** 1294 * netif_stop_subqueue - stop sending packets on subqueue 1295 * @dev: network device 1296 * @queue_index: sub queue index 1297 * 1298 * Stop individual transmit queue of a device with multiple transmit queues. 1299 */ 1300 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1301 { 1302 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1303 #ifdef CONFIG_NETPOLL_TRAP 1304 if (netpoll_trap()) 1305 return; 1306 #endif 1307 set_bit(__QUEUE_STATE_XOFF, &txq->state); 1308 } 1309 1310 /** 1311 * netif_subqueue_stopped - test status of subqueue 1312 * @dev: network device 1313 * @queue_index: sub queue index 1314 * 1315 * Check individual transmit queue of a device with multiple transmit queues. 1316 */ 1317 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1318 u16 queue_index) 1319 { 1320 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1321 return test_bit(__QUEUE_STATE_XOFF, &txq->state); 1322 } 1323 1324 static inline int netif_subqueue_stopped(const struct net_device *dev, 1325 struct sk_buff *skb) 1326 { 1327 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1328 } 1329 1330 /** 1331 * netif_wake_subqueue - allow sending packets on subqueue 1332 * @dev: network device 1333 * @queue_index: sub queue index 1334 * 1335 * Resume individual transmit queue of a device with multiple transmit queues. 1336 */ 1337 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1338 { 1339 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1340 #ifdef CONFIG_NETPOLL_TRAP 1341 if (netpoll_trap()) 1342 return; 1343 #endif 1344 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) 1345 __netif_schedule(txq->qdisc); 1346 } 1347 1348 /** 1349 * netif_is_multiqueue - test if device has multiple transmit queues 1350 * @dev: network device 1351 * 1352 * Check if device has multiple transmit queues 1353 */ 1354 static inline int netif_is_multiqueue(const struct net_device *dev) 1355 { 1356 return (dev->num_tx_queues > 1); 1357 } 1358 1359 /* Use this variant when it is known for sure that it 1360 * is executing from hardware interrupt context or with hardware interrupts 1361 * disabled. 1362 */ 1363 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1364 1365 /* Use this variant in places where it could be invoked 1366 * from either hardware interrupt or other context, with hardware interrupts 1367 * either disabled or enabled. 1368 */ 1369 extern void dev_kfree_skb_any(struct sk_buff *skb); 1370 1371 #define HAVE_NETIF_RX 1 1372 extern int netif_rx(struct sk_buff *skb); 1373 extern int netif_rx_ni(struct sk_buff *skb); 1374 #define HAVE_NETIF_RECEIVE_SKB 1 1375 extern int netif_receive_skb(struct sk_buff *skb); 1376 extern void napi_gro_flush(struct napi_struct *napi); 1377 extern int dev_gro_receive(struct napi_struct *napi, 1378 struct sk_buff *skb); 1379 extern int napi_gro_receive(struct napi_struct *napi, 1380 struct sk_buff *skb); 1381 extern void napi_reuse_skb(struct napi_struct *napi, 1382 struct sk_buff *skb); 1383 extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi, 1384 struct napi_gro_fraginfo *info); 1385 extern int napi_gro_frags(struct napi_struct *napi, 1386 struct napi_gro_fraginfo *info); 1387 extern void netif_nit_deliver(struct sk_buff *skb); 1388 extern int dev_valid_name(const char *name); 1389 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1390 extern int dev_ethtool(struct net *net, struct ifreq *); 1391 extern unsigned dev_get_flags(const struct net_device *); 1392 extern int dev_change_flags(struct net_device *, unsigned); 1393 extern int dev_change_name(struct net_device *, const char *); 1394 extern int dev_set_alias(struct net_device *, const char *, size_t); 1395 extern int dev_change_net_namespace(struct net_device *, 1396 struct net *, const char *); 1397 extern int dev_set_mtu(struct net_device *, int); 1398 extern int dev_set_mac_address(struct net_device *, 1399 struct sockaddr *); 1400 extern int dev_hard_start_xmit(struct sk_buff *skb, 1401 struct net_device *dev, 1402 struct netdev_queue *txq); 1403 1404 extern int netdev_budget; 1405 1406 /* Called by rtnetlink.c:rtnl_unlock() */ 1407 extern void netdev_run_todo(void); 1408 1409 /** 1410 * dev_put - release reference to device 1411 * @dev: network device 1412 * 1413 * Release reference to device to allow it to be freed. 1414 */ 1415 static inline void dev_put(struct net_device *dev) 1416 { 1417 atomic_dec(&dev->refcnt); 1418 } 1419 1420 /** 1421 * dev_hold - get reference to device 1422 * @dev: network device 1423 * 1424 * Hold reference to device to keep it from being freed. 1425 */ 1426 static inline void dev_hold(struct net_device *dev) 1427 { 1428 atomic_inc(&dev->refcnt); 1429 } 1430 1431 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1432 * and _off may be called from IRQ context, but it is caller 1433 * who is responsible for serialization of these calls. 1434 * 1435 * The name carrier is inappropriate, these functions should really be 1436 * called netif_lowerlayer_*() because they represent the state of any 1437 * kind of lower layer not just hardware media. 1438 */ 1439 1440 extern void linkwatch_fire_event(struct net_device *dev); 1441 1442 /** 1443 * netif_carrier_ok - test if carrier present 1444 * @dev: network device 1445 * 1446 * Check if carrier is present on device 1447 */ 1448 static inline int netif_carrier_ok(const struct net_device *dev) 1449 { 1450 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1451 } 1452 1453 extern void __netdev_watchdog_up(struct net_device *dev); 1454 1455 extern void netif_carrier_on(struct net_device *dev); 1456 1457 extern void netif_carrier_off(struct net_device *dev); 1458 1459 /** 1460 * netif_dormant_on - mark device as dormant. 1461 * @dev: network device 1462 * 1463 * Mark device as dormant (as per RFC2863). 1464 * 1465 * The dormant state indicates that the relevant interface is not 1466 * actually in a condition to pass packets (i.e., it is not 'up') but is 1467 * in a "pending" state, waiting for some external event. For "on- 1468 * demand" interfaces, this new state identifies the situation where the 1469 * interface is waiting for events to place it in the up state. 1470 * 1471 */ 1472 static inline void netif_dormant_on(struct net_device *dev) 1473 { 1474 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1475 linkwatch_fire_event(dev); 1476 } 1477 1478 /** 1479 * netif_dormant_off - set device as not dormant. 1480 * @dev: network device 1481 * 1482 * Device is not in dormant state. 1483 */ 1484 static inline void netif_dormant_off(struct net_device *dev) 1485 { 1486 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1487 linkwatch_fire_event(dev); 1488 } 1489 1490 /** 1491 * netif_dormant - test if carrier present 1492 * @dev: network device 1493 * 1494 * Check if carrier is present on device 1495 */ 1496 static inline int netif_dormant(const struct net_device *dev) 1497 { 1498 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1499 } 1500 1501 1502 /** 1503 * netif_oper_up - test if device is operational 1504 * @dev: network device 1505 * 1506 * Check if carrier is operational 1507 */ 1508 static inline int netif_oper_up(const struct net_device *dev) { 1509 return (dev->operstate == IF_OPER_UP || 1510 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1511 } 1512 1513 /** 1514 * netif_device_present - is device available or removed 1515 * @dev: network device 1516 * 1517 * Check if device has not been removed from system. 1518 */ 1519 static inline int netif_device_present(struct net_device *dev) 1520 { 1521 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1522 } 1523 1524 extern void netif_device_detach(struct net_device *dev); 1525 1526 extern void netif_device_attach(struct net_device *dev); 1527 1528 /* 1529 * Network interface message level settings 1530 */ 1531 #define HAVE_NETIF_MSG 1 1532 1533 enum { 1534 NETIF_MSG_DRV = 0x0001, 1535 NETIF_MSG_PROBE = 0x0002, 1536 NETIF_MSG_LINK = 0x0004, 1537 NETIF_MSG_TIMER = 0x0008, 1538 NETIF_MSG_IFDOWN = 0x0010, 1539 NETIF_MSG_IFUP = 0x0020, 1540 NETIF_MSG_RX_ERR = 0x0040, 1541 NETIF_MSG_TX_ERR = 0x0080, 1542 NETIF_MSG_TX_QUEUED = 0x0100, 1543 NETIF_MSG_INTR = 0x0200, 1544 NETIF_MSG_TX_DONE = 0x0400, 1545 NETIF_MSG_RX_STATUS = 0x0800, 1546 NETIF_MSG_PKTDATA = 0x1000, 1547 NETIF_MSG_HW = 0x2000, 1548 NETIF_MSG_WOL = 0x4000, 1549 }; 1550 1551 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1552 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1553 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1554 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1555 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1556 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1557 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1558 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1559 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1560 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1561 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1562 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1563 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1564 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1565 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1566 1567 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1568 { 1569 /* use default */ 1570 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1571 return default_msg_enable_bits; 1572 if (debug_value == 0) /* no output */ 1573 return 0; 1574 /* set low N bits */ 1575 return (1 << debug_value) - 1; 1576 } 1577 1578 /* Test if receive needs to be scheduled but only if up */ 1579 static inline int netif_rx_schedule_prep(struct napi_struct *napi) 1580 { 1581 return napi_schedule_prep(napi); 1582 } 1583 1584 /* Add interface to tail of rx poll list. This assumes that _prep has 1585 * already been called and returned 1. 1586 */ 1587 static inline void __netif_rx_schedule(struct napi_struct *napi) 1588 { 1589 __napi_schedule(napi); 1590 } 1591 1592 /* Try to reschedule poll. Called by irq handler. */ 1593 1594 static inline void netif_rx_schedule(struct napi_struct *napi) 1595 { 1596 if (netif_rx_schedule_prep(napi)) 1597 __netif_rx_schedule(napi); 1598 } 1599 1600 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ 1601 static inline int netif_rx_reschedule(struct napi_struct *napi) 1602 { 1603 if (napi_schedule_prep(napi)) { 1604 __netif_rx_schedule(napi); 1605 return 1; 1606 } 1607 return 0; 1608 } 1609 1610 /* same as netif_rx_complete, except that local_irq_save(flags) 1611 * has already been issued 1612 */ 1613 static inline void __netif_rx_complete(struct napi_struct *napi) 1614 { 1615 __napi_complete(napi); 1616 } 1617 1618 /* Remove interface from poll list: it must be in the poll list 1619 * on current cpu. This primitive is called by dev->poll(), when 1620 * it completes the work. The device cannot be out of poll list at this 1621 * moment, it is BUG(). 1622 */ 1623 static inline void netif_rx_complete(struct napi_struct *napi) 1624 { 1625 napi_complete(napi); 1626 } 1627 1628 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) 1629 { 1630 spin_lock(&txq->_xmit_lock); 1631 txq->xmit_lock_owner = cpu; 1632 } 1633 1634 static inline void __netif_tx_lock_bh(struct netdev_queue *txq) 1635 { 1636 spin_lock_bh(&txq->_xmit_lock); 1637 txq->xmit_lock_owner = smp_processor_id(); 1638 } 1639 1640 static inline int __netif_tx_trylock(struct netdev_queue *txq) 1641 { 1642 int ok = spin_trylock(&txq->_xmit_lock); 1643 if (likely(ok)) 1644 txq->xmit_lock_owner = smp_processor_id(); 1645 return ok; 1646 } 1647 1648 static inline void __netif_tx_unlock(struct netdev_queue *txq) 1649 { 1650 txq->xmit_lock_owner = -1; 1651 spin_unlock(&txq->_xmit_lock); 1652 } 1653 1654 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) 1655 { 1656 txq->xmit_lock_owner = -1; 1657 spin_unlock_bh(&txq->_xmit_lock); 1658 } 1659 1660 /** 1661 * netif_tx_lock - grab network device transmit lock 1662 * @dev: network device 1663 * 1664 * Get network device transmit lock 1665 */ 1666 static inline void netif_tx_lock(struct net_device *dev) 1667 { 1668 unsigned int i; 1669 int cpu; 1670 1671 spin_lock(&dev->tx_global_lock); 1672 cpu = smp_processor_id(); 1673 for (i = 0; i < dev->num_tx_queues; i++) { 1674 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1675 1676 /* We are the only thread of execution doing a 1677 * freeze, but we have to grab the _xmit_lock in 1678 * order to synchronize with threads which are in 1679 * the ->hard_start_xmit() handler and already 1680 * checked the frozen bit. 1681 */ 1682 __netif_tx_lock(txq, cpu); 1683 set_bit(__QUEUE_STATE_FROZEN, &txq->state); 1684 __netif_tx_unlock(txq); 1685 } 1686 } 1687 1688 static inline void netif_tx_lock_bh(struct net_device *dev) 1689 { 1690 local_bh_disable(); 1691 netif_tx_lock(dev); 1692 } 1693 1694 static inline void netif_tx_unlock(struct net_device *dev) 1695 { 1696 unsigned int i; 1697 1698 for (i = 0; i < dev->num_tx_queues; i++) { 1699 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1700 1701 /* No need to grab the _xmit_lock here. If the 1702 * queue is not stopped for another reason, we 1703 * force a schedule. 1704 */ 1705 clear_bit(__QUEUE_STATE_FROZEN, &txq->state); 1706 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1707 __netif_schedule(txq->qdisc); 1708 } 1709 spin_unlock(&dev->tx_global_lock); 1710 } 1711 1712 static inline void netif_tx_unlock_bh(struct net_device *dev) 1713 { 1714 netif_tx_unlock(dev); 1715 local_bh_enable(); 1716 } 1717 1718 #define HARD_TX_LOCK(dev, txq, cpu) { \ 1719 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1720 __netif_tx_lock(txq, cpu); \ 1721 } \ 1722 } 1723 1724 #define HARD_TX_UNLOCK(dev, txq) { \ 1725 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1726 __netif_tx_unlock(txq); \ 1727 } \ 1728 } 1729 1730 static inline void netif_tx_disable(struct net_device *dev) 1731 { 1732 unsigned int i; 1733 int cpu; 1734 1735 local_bh_disable(); 1736 cpu = smp_processor_id(); 1737 for (i = 0; i < dev->num_tx_queues; i++) { 1738 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1739 1740 __netif_tx_lock(txq, cpu); 1741 netif_tx_stop_queue(txq); 1742 __netif_tx_unlock(txq); 1743 } 1744 local_bh_enable(); 1745 } 1746 1747 static inline void netif_addr_lock(struct net_device *dev) 1748 { 1749 spin_lock(&dev->addr_list_lock); 1750 } 1751 1752 static inline void netif_addr_lock_bh(struct net_device *dev) 1753 { 1754 spin_lock_bh(&dev->addr_list_lock); 1755 } 1756 1757 static inline void netif_addr_unlock(struct net_device *dev) 1758 { 1759 spin_unlock(&dev->addr_list_lock); 1760 } 1761 1762 static inline void netif_addr_unlock_bh(struct net_device *dev) 1763 { 1764 spin_unlock_bh(&dev->addr_list_lock); 1765 } 1766 1767 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1768 1769 extern void ether_setup(struct net_device *dev); 1770 1771 /* Support for loadable net-drivers */ 1772 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1773 void (*setup)(struct net_device *), 1774 unsigned int queue_count); 1775 #define alloc_netdev(sizeof_priv, name, setup) \ 1776 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1777 extern int register_netdev(struct net_device *dev); 1778 extern void unregister_netdev(struct net_device *dev); 1779 /* Functions used for secondary unicast and multicast support */ 1780 extern void dev_set_rx_mode(struct net_device *dev); 1781 extern void __dev_set_rx_mode(struct net_device *dev); 1782 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); 1783 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); 1784 extern int dev_unicast_sync(struct net_device *to, struct net_device *from); 1785 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); 1786 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1787 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1788 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1789 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1790 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1791 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1792 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1793 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1794 extern int dev_set_promiscuity(struct net_device *dev, int inc); 1795 extern int dev_set_allmulti(struct net_device *dev, int inc); 1796 extern void netdev_state_change(struct net_device *dev); 1797 extern void netdev_bonding_change(struct net_device *dev); 1798 extern void netdev_features_change(struct net_device *dev); 1799 /* Load a device via the kmod */ 1800 extern void dev_load(struct net *net, const char *name); 1801 extern void dev_mcast_init(void); 1802 extern const struct net_device_stats *dev_get_stats(struct net_device *dev); 1803 1804 extern int netdev_max_backlog; 1805 extern int weight_p; 1806 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1807 extern int skb_checksum_help(struct sk_buff *skb); 1808 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1809 #ifdef CONFIG_BUG 1810 extern void netdev_rx_csum_fault(struct net_device *dev); 1811 #else 1812 static inline void netdev_rx_csum_fault(struct net_device *dev) 1813 { 1814 } 1815 #endif 1816 /* rx skb timestamps */ 1817 extern void net_enable_timestamp(void); 1818 extern void net_disable_timestamp(void); 1819 1820 #ifdef CONFIG_PROC_FS 1821 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1822 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1823 extern void dev_seq_stop(struct seq_file *seq, void *v); 1824 #endif 1825 1826 extern int netdev_class_create_file(struct class_attribute *class_attr); 1827 extern void netdev_class_remove_file(struct class_attribute *class_attr); 1828 1829 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); 1830 1831 extern void linkwatch_run_queue(void); 1832 1833 unsigned long netdev_increment_features(unsigned long all, unsigned long one, 1834 unsigned long mask); 1835 unsigned long netdev_fix_features(unsigned long features, const char *name); 1836 1837 static inline int net_gso_ok(int features, int gso_type) 1838 { 1839 int feature = gso_type << NETIF_F_GSO_SHIFT; 1840 return (features & feature) == feature; 1841 } 1842 1843 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1844 { 1845 return net_gso_ok(features, skb_shinfo(skb)->gso_type); 1846 } 1847 1848 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1849 { 1850 return skb_is_gso(skb) && 1851 (!skb_gso_ok(skb, dev->features) || 1852 (skb_shinfo(skb)->frag_list && 1853 !(dev->features & NETIF_F_FRAGLIST)) || 1854 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1855 } 1856 1857 static inline void netif_set_gso_max_size(struct net_device *dev, 1858 unsigned int size) 1859 { 1860 dev->gso_max_size = size; 1861 } 1862 1863 /* On bonding slaves other than the currently active slave, suppress 1864 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1865 * ARP on active-backup slaves with arp_validate enabled. 1866 */ 1867 static inline int skb_bond_should_drop(struct sk_buff *skb) 1868 { 1869 struct net_device *dev = skb->dev; 1870 struct net_device *master = dev->master; 1871 1872 if (master) { 1873 if (master->priv_flags & IFF_MASTER_ARPMON) 1874 dev->last_rx = jiffies; 1875 1876 if (dev->priv_flags & IFF_SLAVE_INACTIVE) { 1877 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1878 skb->protocol == __constant_htons(ETH_P_ARP)) 1879 return 0; 1880 1881 if (master->priv_flags & IFF_MASTER_ALB) { 1882 if (skb->pkt_type != PACKET_BROADCAST && 1883 skb->pkt_type != PACKET_MULTICAST) 1884 return 0; 1885 } 1886 if (master->priv_flags & IFF_MASTER_8023AD && 1887 skb->protocol == __constant_htons(ETH_P_SLOW)) 1888 return 0; 1889 1890 return 1; 1891 } 1892 } 1893 return 0; 1894 } 1895 1896 extern struct pernet_operations __net_initdata loopback_net_ops; 1897 #endif /* __KERNEL__ */ 1898 1899 #endif /* _LINUX_DEV_H */ 1900