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 <linux/mm.h> 36 #include <asm/atomic.h> 37 #include <asm/cache.h> 38 #include <asm/byteorder.h> 39 40 #include <linux/device.h> 41 #include <linux/percpu.h> 42 #include <linux/rculist.h> 43 #include <linux/dmaengine.h> 44 #include <linux/workqueue.h> 45 46 #include <linux/ethtool.h> 47 #include <net/net_namespace.h> 48 #include <net/dsa.h> 49 #ifdef CONFIG_DCB 50 #include <net/dcbnl.h> 51 #endif 52 53 struct vlan_group; 54 struct netpoll_info; 55 /* 802.11 specific */ 56 struct wireless_dev; 57 /* source back-compat hooks */ 58 #define SET_ETHTOOL_OPS(netdev,ops) \ 59 ( (netdev)->ethtool_ops = (ops) ) 60 61 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev 62 functions are available. */ 63 #define HAVE_FREE_NETDEV /* free_netdev() */ 64 #define HAVE_NETDEV_PRIV /* netdev_priv() */ 65 66 #define NET_XMIT_SUCCESS 0 67 #define NET_XMIT_DROP 1 /* skb dropped */ 68 #define NET_XMIT_CN 2 /* congestion notification */ 69 #define NET_XMIT_POLICED 3 /* skb is shot by police */ 70 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */ 71 72 /* Backlog congestion levels */ 73 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ 74 #define NET_RX_DROP 1 /* packet dropped */ 75 76 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It 77 * indicates that the device will soon be dropping packets, or already drops 78 * some packets of the same priority; prompting us to send less aggressively. */ 79 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) 80 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) 81 82 /* Driver transmit return codes */ 83 enum netdev_tx { 84 NETDEV_TX_OK = 0, /* driver took care of packet */ 85 NETDEV_TX_BUSY, /* driver tx path was busy*/ 86 NETDEV_TX_LOCKED = -1, /* driver tx lock was already taken */ 87 }; 88 typedef enum netdev_tx netdev_tx_t; 89 90 #endif 91 92 #define MAX_ADDR_LEN 32 /* Largest hardware address length */ 93 94 #ifdef __KERNEL__ 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) || defined(CONFIG_TR_MODULE) 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 netdev_hw_addr { 213 struct list_head list; 214 unsigned char addr[MAX_ADDR_LEN]; 215 unsigned char type; 216 #define NETDEV_HW_ADDR_T_LAN 1 217 #define NETDEV_HW_ADDR_T_SAN 2 218 #define NETDEV_HW_ADDR_T_SLAVE 3 219 #define NETDEV_HW_ADDR_T_UNICAST 4 220 int refcount; 221 bool synced; 222 struct rcu_head rcu_head; 223 }; 224 225 struct netdev_hw_addr_list { 226 struct list_head list; 227 int count; 228 }; 229 230 struct hh_cache 231 { 232 struct hh_cache *hh_next; /* Next entry */ 233 atomic_t hh_refcnt; /* number of users */ 234 /* 235 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate 236 * cache line on SMP. 237 * They are mostly read, but hh_refcnt may be changed quite frequently, 238 * incurring cache line ping pongs. 239 */ 240 __be16 hh_type ____cacheline_aligned_in_smp; 241 /* protocol identifier, f.e ETH_P_IP 242 * NOTE: For VLANs, this will be the 243 * encapuslated type. --BLG 244 */ 245 u16 hh_len; /* length of header */ 246 int (*hh_output)(struct sk_buff *skb); 247 seqlock_t hh_lock; 248 249 /* cached hardware header; allow for machine alignment needs. */ 250 #define HH_DATA_MOD 16 251 #define HH_DATA_OFF(__len) \ 252 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) 253 #define HH_DATA_ALIGN(__len) \ 254 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) 255 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; 256 }; 257 258 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. 259 * Alternative is: 260 * dev->hard_header_len ? (dev->hard_header_len + 261 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 262 * 263 * We could use other alignment values, but we must maintain the 264 * relationship HH alignment <= LL alignment. 265 * 266 * LL_ALLOCATED_SPACE also takes into account the tailroom the device 267 * may need. 268 */ 269 #define LL_RESERVED_SPACE(dev) \ 270 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 271 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ 272 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 273 #define LL_ALLOCATED_SPACE(dev) \ 274 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 275 276 struct header_ops { 277 int (*create) (struct sk_buff *skb, struct net_device *dev, 278 unsigned short type, const void *daddr, 279 const void *saddr, unsigned len); 280 int (*parse)(const struct sk_buff *skb, unsigned char *haddr); 281 int (*rebuild)(struct sk_buff *skb); 282 #define HAVE_HEADER_CACHE 283 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); 284 void (*cache_update)(struct hh_cache *hh, 285 const struct net_device *dev, 286 const unsigned char *haddr); 287 }; 288 289 /* These flag bits are private to the generic network queueing 290 * layer, they may not be explicitly referenced by any other 291 * code. 292 */ 293 294 enum netdev_state_t 295 { 296 __LINK_STATE_START, 297 __LINK_STATE_PRESENT, 298 __LINK_STATE_NOCARRIER, 299 __LINK_STATE_LINKWATCH_PENDING, 300 __LINK_STATE_DORMANT, 301 }; 302 303 304 /* 305 * This structure holds at boot time configured netdevice settings. They 306 * are then used in the device probing. 307 */ 308 struct netdev_boot_setup { 309 char name[IFNAMSIZ]; 310 struct ifmap map; 311 }; 312 #define NETDEV_BOOT_SETUP_MAX 8 313 314 extern int __init netdev_boot_setup(char *str); 315 316 /* 317 * Structure for NAPI scheduling similar to tasklet but with weighting 318 */ 319 struct napi_struct { 320 /* The poll_list must only be managed by the entity which 321 * changes the state of the NAPI_STATE_SCHED bit. This means 322 * whoever atomically sets that bit can add this napi_struct 323 * to the per-cpu poll_list, and whoever clears that bit 324 * can remove from the list right before clearing the bit. 325 */ 326 struct list_head poll_list; 327 328 unsigned long state; 329 int weight; 330 int (*poll)(struct napi_struct *, int); 331 #ifdef CONFIG_NETPOLL 332 spinlock_t poll_lock; 333 int poll_owner; 334 #endif 335 336 unsigned int gro_count; 337 338 struct net_device *dev; 339 struct list_head dev_list; 340 struct sk_buff *gro_list; 341 struct sk_buff *skb; 342 }; 343 344 enum 345 { 346 NAPI_STATE_SCHED, /* Poll is scheduled */ 347 NAPI_STATE_DISABLE, /* Disable pending */ 348 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ 349 }; 350 351 enum { 352 GRO_MERGED, 353 GRO_MERGED_FREE, 354 GRO_HELD, 355 GRO_NORMAL, 356 GRO_DROP, 357 }; 358 359 extern void __napi_schedule(struct napi_struct *n); 360 361 static inline int napi_disable_pending(struct napi_struct *n) 362 { 363 return test_bit(NAPI_STATE_DISABLE, &n->state); 364 } 365 366 /** 367 * napi_schedule_prep - check if napi can be scheduled 368 * @n: napi context 369 * 370 * Test if NAPI routine is already running, and if not mark 371 * it as running. This is used as a condition variable 372 * insure only one NAPI poll instance runs. We also make 373 * sure there is no pending NAPI disable. 374 */ 375 static inline int napi_schedule_prep(struct napi_struct *n) 376 { 377 return !napi_disable_pending(n) && 378 !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 379 } 380 381 /** 382 * napi_schedule - schedule NAPI poll 383 * @n: napi context 384 * 385 * Schedule NAPI poll routine to be called if it is not already 386 * running. 387 */ 388 static inline void napi_schedule(struct napi_struct *n) 389 { 390 if (napi_schedule_prep(n)) 391 __napi_schedule(n); 392 } 393 394 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 395 static inline int napi_reschedule(struct napi_struct *napi) 396 { 397 if (napi_schedule_prep(napi)) { 398 __napi_schedule(napi); 399 return 1; 400 } 401 return 0; 402 } 403 404 /** 405 * napi_complete - NAPI processing complete 406 * @n: napi context 407 * 408 * Mark NAPI processing as complete. 409 */ 410 extern void __napi_complete(struct napi_struct *n); 411 extern void napi_complete(struct napi_struct *n); 412 413 /** 414 * napi_disable - prevent NAPI from scheduling 415 * @n: napi context 416 * 417 * Stop NAPI from being scheduled on this context. 418 * Waits till any outstanding processing completes. 419 */ 420 static inline void napi_disable(struct napi_struct *n) 421 { 422 set_bit(NAPI_STATE_DISABLE, &n->state); 423 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 424 msleep(1); 425 clear_bit(NAPI_STATE_DISABLE, &n->state); 426 } 427 428 /** 429 * napi_enable - enable NAPI scheduling 430 * @n: napi context 431 * 432 * Resume NAPI from being scheduled on this context. 433 * Must be paired with napi_disable. 434 */ 435 static inline void napi_enable(struct napi_struct *n) 436 { 437 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 438 smp_mb__before_clear_bit(); 439 clear_bit(NAPI_STATE_SCHED, &n->state); 440 } 441 442 #ifdef CONFIG_SMP 443 /** 444 * napi_synchronize - wait until NAPI is not running 445 * @n: napi context 446 * 447 * Wait until NAPI is done being scheduled on this context. 448 * Waits till any outstanding processing completes but 449 * does not disable future activations. 450 */ 451 static inline void napi_synchronize(const struct napi_struct *n) 452 { 453 while (test_bit(NAPI_STATE_SCHED, &n->state)) 454 msleep(1); 455 } 456 #else 457 # define napi_synchronize(n) barrier() 458 #endif 459 460 enum netdev_queue_state_t 461 { 462 __QUEUE_STATE_XOFF, 463 __QUEUE_STATE_FROZEN, 464 }; 465 466 struct netdev_queue { 467 /* 468 * read mostly part 469 */ 470 struct net_device *dev; 471 struct Qdisc *qdisc; 472 unsigned long state; 473 struct Qdisc *qdisc_sleeping; 474 /* 475 * write mostly part 476 */ 477 spinlock_t _xmit_lock ____cacheline_aligned_in_smp; 478 int xmit_lock_owner; 479 /* 480 * please use this field instead of dev->trans_start 481 */ 482 unsigned long trans_start; 483 unsigned long tx_bytes; 484 unsigned long tx_packets; 485 unsigned long tx_dropped; 486 } ____cacheline_aligned_in_smp; 487 488 489 /* 490 * This structure defines the management hooks for network devices. 491 * The following hooks can be defined; unless noted otherwise, they are 492 * optional and can be filled with a null pointer. 493 * 494 * int (*ndo_init)(struct net_device *dev); 495 * This function is called once when network device is registered. 496 * The network device can use this to any late stage initializaton 497 * or semantic validattion. It can fail with an error code which will 498 * be propogated back to register_netdev 499 * 500 * void (*ndo_uninit)(struct net_device *dev); 501 * This function is called when device is unregistered or when registration 502 * fails. It is not called if init fails. 503 * 504 * int (*ndo_open)(struct net_device *dev); 505 * This function is called when network device transistions to the up 506 * state. 507 * 508 * int (*ndo_stop)(struct net_device *dev); 509 * This function is called when network device transistions to the down 510 * state. 511 * 512 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, 513 * struct net_device *dev); 514 * Called when a packet needs to be transmitted. 515 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. 516 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) 517 * Required can not be NULL. 518 * 519 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); 520 * Called to decide which queue to when device supports multiple 521 * transmit queues. 522 * 523 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); 524 * This function is called to allow device receiver to make 525 * changes to configuration when multicast or promiscious is enabled. 526 * 527 * void (*ndo_set_rx_mode)(struct net_device *dev); 528 * This function is called device changes address list filtering. 529 * 530 * void (*ndo_set_multicast_list)(struct net_device *dev); 531 * This function is called when the multicast address list changes. 532 * 533 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); 534 * This function is called when the Media Access Control address 535 * needs to be changed. If this interface is not defined, the 536 * mac address can not be changed. 537 * 538 * int (*ndo_validate_addr)(struct net_device *dev); 539 * Test if Media Access Control address is valid for the device. 540 * 541 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); 542 * Called when a user request an ioctl which can't be handled by 543 * the generic interface code. If not defined ioctl's return 544 * not supported error code. 545 * 546 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); 547 * Used to set network devices bus interface parameters. This interface 548 * is retained for legacy reason, new devices should use the bus 549 * interface (PCI) for low level management. 550 * 551 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); 552 * Called when a user wants to change the Maximum Transfer Unit 553 * of a device. If not defined, any request to change MTU will 554 * will return an error. 555 * 556 * void (*ndo_tx_timeout)(struct net_device *dev); 557 * Callback uses when the transmitter has not made any progress 558 * for dev->watchdog ticks. 559 * 560 * struct net_device_stats* (*get_stats)(struct net_device *dev); 561 * Called when a user wants to get the network device usage 562 * statistics. If not defined, the counters in dev->stats will 563 * be used. 564 * 565 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); 566 * If device support VLAN receive accleration 567 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called 568 * when vlan groups for the device changes. Note: grp is NULL 569 * if no vlan's groups are being used. 570 * 571 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); 572 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 573 * this function is called when a VLAN id is registered. 574 * 575 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); 576 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 577 * this function is called when a VLAN id is unregistered. 578 * 579 * void (*ndo_poll_controller)(struct net_device *dev); 580 */ 581 #define HAVE_NET_DEVICE_OPS 582 struct net_device_ops { 583 int (*ndo_init)(struct net_device *dev); 584 void (*ndo_uninit)(struct net_device *dev); 585 int (*ndo_open)(struct net_device *dev); 586 int (*ndo_stop)(struct net_device *dev); 587 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, 588 struct net_device *dev); 589 u16 (*ndo_select_queue)(struct net_device *dev, 590 struct sk_buff *skb); 591 #define HAVE_CHANGE_RX_FLAGS 592 void (*ndo_change_rx_flags)(struct net_device *dev, 593 int flags); 594 #define HAVE_SET_RX_MODE 595 void (*ndo_set_rx_mode)(struct net_device *dev); 596 #define HAVE_MULTICAST 597 void (*ndo_set_multicast_list)(struct net_device *dev); 598 #define HAVE_SET_MAC_ADDR 599 int (*ndo_set_mac_address)(struct net_device *dev, 600 void *addr); 601 #define HAVE_VALIDATE_ADDR 602 int (*ndo_validate_addr)(struct net_device *dev); 603 #define HAVE_PRIVATE_IOCTL 604 int (*ndo_do_ioctl)(struct net_device *dev, 605 struct ifreq *ifr, int cmd); 606 #define HAVE_SET_CONFIG 607 int (*ndo_set_config)(struct net_device *dev, 608 struct ifmap *map); 609 #define HAVE_CHANGE_MTU 610 int (*ndo_change_mtu)(struct net_device *dev, 611 int new_mtu); 612 int (*ndo_neigh_setup)(struct net_device *dev, 613 struct neigh_parms *); 614 #define HAVE_TX_TIMEOUT 615 void (*ndo_tx_timeout) (struct net_device *dev); 616 617 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); 618 619 void (*ndo_vlan_rx_register)(struct net_device *dev, 620 struct vlan_group *grp); 621 void (*ndo_vlan_rx_add_vid)(struct net_device *dev, 622 unsigned short vid); 623 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, 624 unsigned short vid); 625 #ifdef CONFIG_NET_POLL_CONTROLLER 626 #define HAVE_NETDEV_POLL 627 void (*ndo_poll_controller)(struct net_device *dev); 628 #endif 629 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 630 int (*ndo_fcoe_enable)(struct net_device *dev); 631 int (*ndo_fcoe_disable)(struct net_device *dev); 632 int (*ndo_fcoe_ddp_setup)(struct net_device *dev, 633 u16 xid, 634 struct scatterlist *sgl, 635 unsigned int sgc); 636 int (*ndo_fcoe_ddp_done)(struct net_device *dev, 637 u16 xid); 638 #endif 639 }; 640 641 /* 642 * The DEVICE structure. 643 * Actually, this whole structure is a big mistake. It mixes I/O 644 * data with strictly "high-level" data, and it has to know about 645 * almost every data structure used in the INET module. 646 * 647 * FIXME: cleanup struct net_device such that network protocol info 648 * moves out. 649 */ 650 651 struct net_device 652 { 653 654 /* 655 * This is the first field of the "visible" part of this structure 656 * (i.e. as seen by users in the "Space.c" file). It is the name 657 * the interface. 658 */ 659 char name[IFNAMSIZ]; 660 /* device name hash chain */ 661 struct hlist_node name_hlist; 662 /* snmp alias */ 663 char *ifalias; 664 665 /* 666 * I/O specific fields 667 * FIXME: Merge these and struct ifmap into one 668 */ 669 unsigned long mem_end; /* shared mem end */ 670 unsigned long mem_start; /* shared mem start */ 671 unsigned long base_addr; /* device I/O address */ 672 unsigned int irq; /* device IRQ number */ 673 674 /* 675 * Some hardware also needs these fields, but they are not 676 * part of the usual set specified in Space.c. 677 */ 678 679 unsigned char if_port; /* Selectable AUI, TP,..*/ 680 unsigned char dma; /* DMA channel */ 681 682 unsigned long state; 683 684 struct list_head dev_list; 685 struct list_head napi_list; 686 687 /* Net device features */ 688 unsigned long features; 689 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 690 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 691 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 692 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 693 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 694 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 695 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 696 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 697 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 698 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 699 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 700 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 701 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 702 /* do not use LLTX in new drivers */ 703 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 704 #define NETIF_F_GRO 16384 /* Generic receive offload */ 705 #define NETIF_F_LRO 32768 /* large receive offload */ 706 707 /* the GSO_MASK reserves bits 16 through 23 */ 708 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ 709 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ 710 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ 711 712 /* Segmentation offload features */ 713 #define NETIF_F_GSO_SHIFT 16 714 #define NETIF_F_GSO_MASK 0x00ff0000 715 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 716 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 717 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 718 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 719 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 720 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) 721 722 /* List of features with software fallbacks. */ 723 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 724 725 726 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 727 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 728 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 729 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 730 731 /* 732 * If one device supports one of these features, then enable them 733 * for all in netdev_increment_features. 734 */ 735 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ 736 NETIF_F_SG | NETIF_F_HIGHDMA | \ 737 NETIF_F_FRAGLIST) 738 739 /* Interface index. Unique device identifier */ 740 int ifindex; 741 int iflink; 742 743 struct net_device_stats stats; 744 745 #ifdef CONFIG_WIRELESS_EXT 746 /* List of functions to handle Wireless Extensions (instead of ioctl). 747 * See <net/iw_handler.h> for details. Jean II */ 748 const struct iw_handler_def * wireless_handlers; 749 /* Instance data managed by the core of Wireless Extensions. */ 750 struct iw_public_data * wireless_data; 751 #endif 752 /* Management operations */ 753 const struct net_device_ops *netdev_ops; 754 const struct ethtool_ops *ethtool_ops; 755 756 /* Hardware header description */ 757 const struct header_ops *header_ops; 758 759 unsigned int flags; /* interface flags (a la BSD) */ 760 unsigned short gflags; 761 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 762 unsigned short padded; /* How much padding added by alloc_netdev() */ 763 764 unsigned char operstate; /* RFC2863 operstate */ 765 unsigned char link_mode; /* mapping policy to operstate */ 766 767 unsigned mtu; /* interface MTU value */ 768 unsigned short type; /* interface hardware type */ 769 unsigned short hard_header_len; /* hardware hdr length */ 770 771 /* extra head- and tailroom the hardware may need, but not in all cases 772 * can this be guaranteed, especially tailroom. Some cases also use 773 * LL_MAX_HEADER instead to allocate the skb. 774 */ 775 unsigned short needed_headroom; 776 unsigned short needed_tailroom; 777 778 struct net_device *master; /* Pointer to master device of a group, 779 * which this device is member of. 780 */ 781 782 /* Interface address info. */ 783 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 784 unsigned char addr_len; /* hardware address length */ 785 unsigned short dev_id; /* for shared network cards */ 786 787 struct netdev_hw_addr_list uc; /* Secondary unicast 788 mac addresses */ 789 int uc_promisc; 790 spinlock_t addr_list_lock; 791 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 792 int mc_count; /* Number of installed mcasts */ 793 unsigned int promiscuity; 794 unsigned int allmulti; 795 796 797 /* Protocol specific pointers */ 798 799 #ifdef CONFIG_NET_DSA 800 void *dsa_ptr; /* dsa specific data */ 801 #endif 802 void *atalk_ptr; /* AppleTalk link */ 803 void *ip_ptr; /* IPv4 specific data */ 804 void *dn_ptr; /* DECnet specific data */ 805 void *ip6_ptr; /* IPv6 specific data */ 806 void *ec_ptr; /* Econet specific data */ 807 void *ax25_ptr; /* AX.25 specific data */ 808 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 809 assign before registering */ 810 811 /* 812 * Cache line mostly used on receive path (including eth_type_trans()) 813 */ 814 unsigned long last_rx; /* Time of last Rx */ 815 /* Interface address info used in eth_type_trans() */ 816 unsigned char *dev_addr; /* hw address, (before bcast 817 because most packets are 818 unicast) */ 819 820 struct netdev_hw_addr_list dev_addrs; /* list of device 821 hw addresses */ 822 823 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 824 825 struct netdev_queue rx_queue; 826 827 struct netdev_queue *_tx ____cacheline_aligned_in_smp; 828 829 /* Number of TX queues allocated at alloc_netdev_mq() time */ 830 unsigned int num_tx_queues; 831 832 /* Number of TX queues currently active in device */ 833 unsigned int real_num_tx_queues; 834 835 /* root qdisc from userspace point of view */ 836 struct Qdisc *qdisc; 837 838 unsigned long tx_queue_len; /* Max frames per queue allowed */ 839 spinlock_t tx_global_lock; 840 /* 841 * One part is mostly used on xmit path (device) 842 */ 843 /* These may be needed for future network-power-down code. */ 844 845 /* 846 * trans_start here is expensive for high speed devices on SMP, 847 * please use netdev_queue->trans_start instead. 848 */ 849 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 850 851 int watchdog_timeo; /* used by dev_watchdog() */ 852 struct timer_list watchdog_timer; 853 854 /* Number of references to this device */ 855 atomic_t refcnt ____cacheline_aligned_in_smp; 856 857 /* delayed register/unregister */ 858 struct list_head todo_list; 859 /* device index hash chain */ 860 struct hlist_node index_hlist; 861 862 struct net_device *link_watch_next; 863 864 /* register/unregister state machine */ 865 enum { NETREG_UNINITIALIZED=0, 866 NETREG_REGISTERED, /* completed register_netdevice */ 867 NETREG_UNREGISTERING, /* called unregister_netdevice */ 868 NETREG_UNREGISTERED, /* completed unregister todo */ 869 NETREG_RELEASED, /* called free_netdev */ 870 NETREG_DUMMY, /* dummy device for NAPI poll */ 871 } reg_state; 872 873 /* Called from unregister, can be used to call free_netdev */ 874 void (*destructor)(struct net_device *dev); 875 876 #ifdef CONFIG_NETPOLL 877 struct netpoll_info *npinfo; 878 #endif 879 880 #ifdef CONFIG_NET_NS 881 /* Network namespace this network device is inside */ 882 struct net *nd_net; 883 #endif 884 885 /* mid-layer private */ 886 void *ml_priv; 887 888 /* bridge stuff */ 889 struct net_bridge_port *br_port; 890 /* macvlan */ 891 struct macvlan_port *macvlan_port; 892 /* GARP */ 893 struct garp_port *garp_port; 894 895 /* class/net/name entry */ 896 struct device dev; 897 /* space for optional statistics and wireless sysfs groups */ 898 const struct attribute_group *sysfs_groups[3]; 899 900 /* rtnetlink link ops */ 901 const struct rtnl_link_ops *rtnl_link_ops; 902 903 /* VLAN feature mask */ 904 unsigned long vlan_features; 905 906 /* for setting kernel sock attribute on TCP connection setup */ 907 #define GSO_MAX_SIZE 65536 908 unsigned int gso_max_size; 909 910 #ifdef CONFIG_DCB 911 /* Data Center Bridging netlink ops */ 912 struct dcbnl_rtnl_ops *dcbnl_ops; 913 #endif 914 915 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 916 /* max exchange id for FCoE LRO by ddp */ 917 unsigned int fcoe_ddp_xid; 918 #endif 919 }; 920 #define to_net_dev(d) container_of(d, struct net_device, dev) 921 922 #define NETDEV_ALIGN 32 923 924 static inline 925 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, 926 unsigned int index) 927 { 928 return &dev->_tx[index]; 929 } 930 931 static inline void netdev_for_each_tx_queue(struct net_device *dev, 932 void (*f)(struct net_device *, 933 struct netdev_queue *, 934 void *), 935 void *arg) 936 { 937 unsigned int i; 938 939 for (i = 0; i < dev->num_tx_queues; i++) 940 f(dev, &dev->_tx[i], arg); 941 } 942 943 /* 944 * Net namespace inlines 945 */ 946 static inline 947 struct net *dev_net(const struct net_device *dev) 948 { 949 #ifdef CONFIG_NET_NS 950 return dev->nd_net; 951 #else 952 return &init_net; 953 #endif 954 } 955 956 static inline 957 void dev_net_set(struct net_device *dev, struct net *net) 958 { 959 #ifdef CONFIG_NET_NS 960 release_net(dev->nd_net); 961 dev->nd_net = hold_net(net); 962 #endif 963 } 964 965 static inline bool netdev_uses_dsa_tags(struct net_device *dev) 966 { 967 #ifdef CONFIG_NET_DSA_TAG_DSA 968 if (dev->dsa_ptr != NULL) 969 return dsa_uses_dsa_tags(dev->dsa_ptr); 970 #endif 971 972 return 0; 973 } 974 975 static inline bool netdev_uses_trailer_tags(struct net_device *dev) 976 { 977 #ifdef CONFIG_NET_DSA_TAG_TRAILER 978 if (dev->dsa_ptr != NULL) 979 return dsa_uses_trailer_tags(dev->dsa_ptr); 980 #endif 981 982 return 0; 983 } 984 985 /** 986 * netdev_priv - access network device private data 987 * @dev: network device 988 * 989 * Get network device private data 990 */ 991 static inline void *netdev_priv(const struct net_device *dev) 992 { 993 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); 994 } 995 996 /* Set the sysfs physical device reference for the network logical device 997 * if set prior to registration will cause a symlink during initialization. 998 */ 999 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 1000 1001 /* Set the sysfs device type for the network logical device to allow 1002 * fin grained indentification of different network device types. For 1003 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. 1004 */ 1005 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) 1006 1007 /** 1008 * netif_napi_add - initialize a napi context 1009 * @dev: network device 1010 * @napi: napi context 1011 * @poll: polling function 1012 * @weight: default weight 1013 * 1014 * netif_napi_add() must be used to initialize a napi context prior to calling 1015 * *any* of the other napi related functions. 1016 */ 1017 void netif_napi_add(struct net_device *dev, struct napi_struct *napi, 1018 int (*poll)(struct napi_struct *, int), int weight); 1019 1020 /** 1021 * netif_napi_del - remove a napi context 1022 * @napi: napi context 1023 * 1024 * netif_napi_del() removes a napi context from the network device napi list 1025 */ 1026 void netif_napi_del(struct napi_struct *napi); 1027 1028 struct napi_gro_cb { 1029 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ 1030 void *frag0; 1031 1032 /* Length of frag0. */ 1033 unsigned int frag0_len; 1034 1035 /* This indicates where we are processing relative to skb->data. */ 1036 int data_offset; 1037 1038 /* This is non-zero if the packet may be of the same flow. */ 1039 int same_flow; 1040 1041 /* This is non-zero if the packet cannot be merged with the new skb. */ 1042 int flush; 1043 1044 /* Number of segments aggregated. */ 1045 int count; 1046 1047 /* Free the skb? */ 1048 int free; 1049 }; 1050 1051 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) 1052 1053 struct packet_type { 1054 __be16 type; /* This is really htons(ether_type). */ 1055 struct net_device *dev; /* NULL is wildcarded here */ 1056 int (*func) (struct sk_buff *, 1057 struct net_device *, 1058 struct packet_type *, 1059 struct net_device *); 1060 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 1061 int features); 1062 int (*gso_send_check)(struct sk_buff *skb); 1063 struct sk_buff **(*gro_receive)(struct sk_buff **head, 1064 struct sk_buff *skb); 1065 int (*gro_complete)(struct sk_buff *skb); 1066 void *af_packet_priv; 1067 struct list_head list; 1068 }; 1069 1070 #include <linux/interrupt.h> 1071 #include <linux/notifier.h> 1072 1073 extern rwlock_t dev_base_lock; /* Device list lock */ 1074 1075 1076 #define for_each_netdev(net, d) \ 1077 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 1078 #define for_each_netdev_safe(net, d, n) \ 1079 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 1080 #define for_each_netdev_continue(net, d) \ 1081 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 1082 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 1083 1084 static inline struct net_device *next_net_device(struct net_device *dev) 1085 { 1086 struct list_head *lh; 1087 struct net *net; 1088 1089 net = dev_net(dev); 1090 lh = dev->dev_list.next; 1091 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 1092 } 1093 1094 static inline struct net_device *first_net_device(struct net *net) 1095 { 1096 return list_empty(&net->dev_base_head) ? NULL : 1097 net_device_entry(net->dev_base_head.next); 1098 } 1099 1100 extern int netdev_boot_setup_check(struct net_device *dev); 1101 extern unsigned long netdev_boot_base(const char *prefix, int unit); 1102 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 1103 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 1104 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 1105 extern void dev_add_pack(struct packet_type *pt); 1106 extern void dev_remove_pack(struct packet_type *pt); 1107 extern void __dev_remove_pack(struct packet_type *pt); 1108 1109 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 1110 unsigned short mask); 1111 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 1112 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 1113 extern int dev_alloc_name(struct net_device *dev, const char *name); 1114 extern int dev_open(struct net_device *dev); 1115 extern int dev_close(struct net_device *dev); 1116 extern void dev_disable_lro(struct net_device *dev); 1117 extern int dev_queue_xmit(struct sk_buff *skb); 1118 extern int register_netdevice(struct net_device *dev); 1119 extern void unregister_netdevice(struct net_device *dev); 1120 extern void free_netdev(struct net_device *dev); 1121 extern void synchronize_net(void); 1122 extern int register_netdevice_notifier(struct notifier_block *nb); 1123 extern int unregister_netdevice_notifier(struct notifier_block *nb); 1124 extern int init_dummy_netdev(struct net_device *dev); 1125 extern void netdev_resync_ops(struct net_device *dev); 1126 1127 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 1128 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 1129 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 1130 extern int dev_restart(struct net_device *dev); 1131 #ifdef CONFIG_NETPOLL_TRAP 1132 extern int netpoll_trap(void); 1133 #endif 1134 extern int skb_gro_receive(struct sk_buff **head, 1135 struct sk_buff *skb); 1136 extern void skb_gro_reset_offset(struct sk_buff *skb); 1137 1138 static inline unsigned int skb_gro_offset(const struct sk_buff *skb) 1139 { 1140 return NAPI_GRO_CB(skb)->data_offset; 1141 } 1142 1143 static inline unsigned int skb_gro_len(const struct sk_buff *skb) 1144 { 1145 return skb->len - NAPI_GRO_CB(skb)->data_offset; 1146 } 1147 1148 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) 1149 { 1150 NAPI_GRO_CB(skb)->data_offset += len; 1151 } 1152 1153 static inline void *skb_gro_header_fast(struct sk_buff *skb, 1154 unsigned int offset) 1155 { 1156 return NAPI_GRO_CB(skb)->frag0 + offset; 1157 } 1158 1159 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) 1160 { 1161 return NAPI_GRO_CB(skb)->frag0_len < hlen; 1162 } 1163 1164 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, 1165 unsigned int offset) 1166 { 1167 NAPI_GRO_CB(skb)->frag0 = NULL; 1168 NAPI_GRO_CB(skb)->frag0_len = 0; 1169 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; 1170 } 1171 1172 static inline void *skb_gro_mac_header(struct sk_buff *skb) 1173 { 1174 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); 1175 } 1176 1177 static inline void *skb_gro_network_header(struct sk_buff *skb) 1178 { 1179 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + 1180 skb_network_offset(skb); 1181 } 1182 1183 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 1184 unsigned short type, 1185 const void *daddr, const void *saddr, 1186 unsigned len) 1187 { 1188 if (!dev->header_ops || !dev->header_ops->create) 1189 return 0; 1190 1191 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 1192 } 1193 1194 static inline int dev_parse_header(const struct sk_buff *skb, 1195 unsigned char *haddr) 1196 { 1197 const struct net_device *dev = skb->dev; 1198 1199 if (!dev->header_ops || !dev->header_ops->parse) 1200 return 0; 1201 return dev->header_ops->parse(skb, haddr); 1202 } 1203 1204 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 1205 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 1206 static inline int unregister_gifconf(unsigned int family) 1207 { 1208 return register_gifconf(family, NULL); 1209 } 1210 1211 /* 1212 * Incoming packets are placed on per-cpu queues so that 1213 * no locking is needed. 1214 */ 1215 struct softnet_data 1216 { 1217 struct Qdisc *output_queue; 1218 struct sk_buff_head input_pkt_queue; 1219 struct list_head poll_list; 1220 struct sk_buff *completion_queue; 1221 1222 struct napi_struct backlog; 1223 }; 1224 1225 DECLARE_PER_CPU(struct softnet_data,softnet_data); 1226 1227 #define HAVE_NETIF_QUEUE 1228 1229 extern void __netif_schedule(struct Qdisc *q); 1230 1231 static inline void netif_schedule_queue(struct netdev_queue *txq) 1232 { 1233 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1234 __netif_schedule(txq->qdisc); 1235 } 1236 1237 static inline void netif_tx_schedule_all(struct net_device *dev) 1238 { 1239 unsigned int i; 1240 1241 for (i = 0; i < dev->num_tx_queues; i++) 1242 netif_schedule_queue(netdev_get_tx_queue(dev, i)); 1243 } 1244 1245 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) 1246 { 1247 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1248 } 1249 1250 /** 1251 * netif_start_queue - allow transmit 1252 * @dev: network device 1253 * 1254 * Allow upper layers to call the device hard_start_xmit routine. 1255 */ 1256 static inline void netif_start_queue(struct net_device *dev) 1257 { 1258 netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); 1259 } 1260 1261 static inline void netif_tx_start_all_queues(struct net_device *dev) 1262 { 1263 unsigned int i; 1264 1265 for (i = 0; i < dev->num_tx_queues; i++) { 1266 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1267 netif_tx_start_queue(txq); 1268 } 1269 } 1270 1271 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) 1272 { 1273 #ifdef CONFIG_NETPOLL_TRAP 1274 if (netpoll_trap()) { 1275 netif_tx_start_queue(dev_queue); 1276 return; 1277 } 1278 #endif 1279 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) 1280 __netif_schedule(dev_queue->qdisc); 1281 } 1282 1283 /** 1284 * netif_wake_queue - restart transmit 1285 * @dev: network device 1286 * 1287 * Allow upper layers to call the device hard_start_xmit routine. 1288 * Used for flow control when transmit resources are available. 1289 */ 1290 static inline void netif_wake_queue(struct net_device *dev) 1291 { 1292 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); 1293 } 1294 1295 static inline void netif_tx_wake_all_queues(struct net_device *dev) 1296 { 1297 unsigned int i; 1298 1299 for (i = 0; i < dev->num_tx_queues; i++) { 1300 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1301 netif_tx_wake_queue(txq); 1302 } 1303 } 1304 1305 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) 1306 { 1307 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1308 } 1309 1310 /** 1311 * netif_stop_queue - stop transmitted packets 1312 * @dev: network device 1313 * 1314 * Stop upper layers calling the device hard_start_xmit routine. 1315 * Used for flow control when transmit resources are unavailable. 1316 */ 1317 static inline void netif_stop_queue(struct net_device *dev) 1318 { 1319 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); 1320 } 1321 1322 static inline void netif_tx_stop_all_queues(struct net_device *dev) 1323 { 1324 unsigned int i; 1325 1326 for (i = 0; i < dev->num_tx_queues; i++) { 1327 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1328 netif_tx_stop_queue(txq); 1329 } 1330 } 1331 1332 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) 1333 { 1334 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1335 } 1336 1337 /** 1338 * netif_queue_stopped - test if transmit queue is flowblocked 1339 * @dev: network device 1340 * 1341 * Test if transmit queue on device is currently unable to send. 1342 */ 1343 static inline int netif_queue_stopped(const struct net_device *dev) 1344 { 1345 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); 1346 } 1347 1348 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) 1349 { 1350 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); 1351 } 1352 1353 /** 1354 * netif_running - test if up 1355 * @dev: network device 1356 * 1357 * Test if the device has been brought up. 1358 */ 1359 static inline int netif_running(const struct net_device *dev) 1360 { 1361 return test_bit(__LINK_STATE_START, &dev->state); 1362 } 1363 1364 /* 1365 * Routines to manage the subqueues on a device. We only need start 1366 * stop, and a check if it's stopped. All other device management is 1367 * done at the overall netdevice level. 1368 * Also test the device if we're multiqueue. 1369 */ 1370 1371 /** 1372 * netif_start_subqueue - allow sending packets on subqueue 1373 * @dev: network device 1374 * @queue_index: sub queue index 1375 * 1376 * Start individual transmit queue of a device with multiple transmit queues. 1377 */ 1378 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1379 { 1380 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1381 1382 netif_tx_start_queue(txq); 1383 } 1384 1385 /** 1386 * netif_stop_subqueue - stop sending packets on subqueue 1387 * @dev: network device 1388 * @queue_index: sub queue index 1389 * 1390 * Stop individual transmit queue of a device with multiple transmit queues. 1391 */ 1392 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1393 { 1394 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1395 #ifdef CONFIG_NETPOLL_TRAP 1396 if (netpoll_trap()) 1397 return; 1398 #endif 1399 netif_tx_stop_queue(txq); 1400 } 1401 1402 /** 1403 * netif_subqueue_stopped - test status of subqueue 1404 * @dev: network device 1405 * @queue_index: sub queue index 1406 * 1407 * Check individual transmit queue of a device with multiple transmit queues. 1408 */ 1409 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1410 u16 queue_index) 1411 { 1412 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1413 1414 return netif_tx_queue_stopped(txq); 1415 } 1416 1417 static inline int netif_subqueue_stopped(const struct net_device *dev, 1418 struct sk_buff *skb) 1419 { 1420 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1421 } 1422 1423 /** 1424 * netif_wake_subqueue - allow sending packets on subqueue 1425 * @dev: network device 1426 * @queue_index: sub queue index 1427 * 1428 * Resume individual transmit queue of a device with multiple transmit queues. 1429 */ 1430 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1431 { 1432 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1433 #ifdef CONFIG_NETPOLL_TRAP 1434 if (netpoll_trap()) 1435 return; 1436 #endif 1437 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) 1438 __netif_schedule(txq->qdisc); 1439 } 1440 1441 /** 1442 * netif_is_multiqueue - test if device has multiple transmit queues 1443 * @dev: network device 1444 * 1445 * Check if device has multiple transmit queues 1446 */ 1447 static inline int netif_is_multiqueue(const struct net_device *dev) 1448 { 1449 return (dev->num_tx_queues > 1); 1450 } 1451 1452 /* Use this variant when it is known for sure that it 1453 * is executing from hardware interrupt context or with hardware interrupts 1454 * disabled. 1455 */ 1456 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1457 1458 /* Use this variant in places where it could be invoked 1459 * from either hardware interrupt or other context, with hardware interrupts 1460 * either disabled or enabled. 1461 */ 1462 extern void dev_kfree_skb_any(struct sk_buff *skb); 1463 1464 #define HAVE_NETIF_RX 1 1465 extern int netif_rx(struct sk_buff *skb); 1466 extern int netif_rx_ni(struct sk_buff *skb); 1467 #define HAVE_NETIF_RECEIVE_SKB 1 1468 extern int netif_receive_skb(struct sk_buff *skb); 1469 extern void napi_gro_flush(struct napi_struct *napi); 1470 extern int dev_gro_receive(struct napi_struct *napi, 1471 struct sk_buff *skb); 1472 extern int napi_skb_finish(int ret, struct sk_buff *skb); 1473 extern int napi_gro_receive(struct napi_struct *napi, 1474 struct sk_buff *skb); 1475 extern void napi_reuse_skb(struct napi_struct *napi, 1476 struct sk_buff *skb); 1477 extern struct sk_buff * napi_get_frags(struct napi_struct *napi); 1478 extern int napi_frags_finish(struct napi_struct *napi, 1479 struct sk_buff *skb, int ret); 1480 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); 1481 extern int napi_gro_frags(struct napi_struct *napi); 1482 1483 static inline void napi_free_frags(struct napi_struct *napi) 1484 { 1485 kfree_skb(napi->skb); 1486 napi->skb = NULL; 1487 } 1488 1489 extern void netif_nit_deliver(struct sk_buff *skb); 1490 extern int dev_valid_name(const char *name); 1491 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1492 extern int dev_ethtool(struct net *net, struct ifreq *); 1493 extern unsigned dev_get_flags(const struct net_device *); 1494 extern int dev_change_flags(struct net_device *, unsigned); 1495 extern int dev_change_name(struct net_device *, const char *); 1496 extern int dev_set_alias(struct net_device *, const char *, size_t); 1497 extern int dev_change_net_namespace(struct net_device *, 1498 struct net *, const char *); 1499 extern int dev_set_mtu(struct net_device *, int); 1500 extern int dev_set_mac_address(struct net_device *, 1501 struct sockaddr *); 1502 extern int dev_hard_start_xmit(struct sk_buff *skb, 1503 struct net_device *dev, 1504 struct netdev_queue *txq); 1505 1506 extern int netdev_budget; 1507 1508 /* Called by rtnetlink.c:rtnl_unlock() */ 1509 extern void netdev_run_todo(void); 1510 1511 /** 1512 * dev_put - release reference to device 1513 * @dev: network device 1514 * 1515 * Release reference to device to allow it to be freed. 1516 */ 1517 static inline void dev_put(struct net_device *dev) 1518 { 1519 atomic_dec(&dev->refcnt); 1520 } 1521 1522 /** 1523 * dev_hold - get reference to device 1524 * @dev: network device 1525 * 1526 * Hold reference to device to keep it from being freed. 1527 */ 1528 static inline void dev_hold(struct net_device *dev) 1529 { 1530 atomic_inc(&dev->refcnt); 1531 } 1532 1533 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1534 * and _off may be called from IRQ context, but it is caller 1535 * who is responsible for serialization of these calls. 1536 * 1537 * The name carrier is inappropriate, these functions should really be 1538 * called netif_lowerlayer_*() because they represent the state of any 1539 * kind of lower layer not just hardware media. 1540 */ 1541 1542 extern void linkwatch_fire_event(struct net_device *dev); 1543 1544 /** 1545 * netif_carrier_ok - test if carrier present 1546 * @dev: network device 1547 * 1548 * Check if carrier is present on device 1549 */ 1550 static inline int netif_carrier_ok(const struct net_device *dev) 1551 { 1552 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1553 } 1554 1555 extern unsigned long dev_trans_start(struct net_device *dev); 1556 1557 extern void __netdev_watchdog_up(struct net_device *dev); 1558 1559 extern void netif_carrier_on(struct net_device *dev); 1560 1561 extern void netif_carrier_off(struct net_device *dev); 1562 1563 /** 1564 * netif_dormant_on - mark device as dormant. 1565 * @dev: network device 1566 * 1567 * Mark device as dormant (as per RFC2863). 1568 * 1569 * The dormant state indicates that the relevant interface is not 1570 * actually in a condition to pass packets (i.e., it is not 'up') but is 1571 * in a "pending" state, waiting for some external event. For "on- 1572 * demand" interfaces, this new state identifies the situation where the 1573 * interface is waiting for events to place it in the up state. 1574 * 1575 */ 1576 static inline void netif_dormant_on(struct net_device *dev) 1577 { 1578 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1579 linkwatch_fire_event(dev); 1580 } 1581 1582 /** 1583 * netif_dormant_off - set device as not dormant. 1584 * @dev: network device 1585 * 1586 * Device is not in dormant state. 1587 */ 1588 static inline void netif_dormant_off(struct net_device *dev) 1589 { 1590 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1591 linkwatch_fire_event(dev); 1592 } 1593 1594 /** 1595 * netif_dormant - test if carrier present 1596 * @dev: network device 1597 * 1598 * Check if carrier is present on device 1599 */ 1600 static inline int netif_dormant(const struct net_device *dev) 1601 { 1602 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1603 } 1604 1605 1606 /** 1607 * netif_oper_up - test if device is operational 1608 * @dev: network device 1609 * 1610 * Check if carrier is operational 1611 */ 1612 static inline int netif_oper_up(const struct net_device *dev) { 1613 return (dev->operstate == IF_OPER_UP || 1614 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1615 } 1616 1617 /** 1618 * netif_device_present - is device available or removed 1619 * @dev: network device 1620 * 1621 * Check if device has not been removed from system. 1622 */ 1623 static inline int netif_device_present(struct net_device *dev) 1624 { 1625 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1626 } 1627 1628 extern void netif_device_detach(struct net_device *dev); 1629 1630 extern void netif_device_attach(struct net_device *dev); 1631 1632 /* 1633 * Network interface message level settings 1634 */ 1635 #define HAVE_NETIF_MSG 1 1636 1637 enum { 1638 NETIF_MSG_DRV = 0x0001, 1639 NETIF_MSG_PROBE = 0x0002, 1640 NETIF_MSG_LINK = 0x0004, 1641 NETIF_MSG_TIMER = 0x0008, 1642 NETIF_MSG_IFDOWN = 0x0010, 1643 NETIF_MSG_IFUP = 0x0020, 1644 NETIF_MSG_RX_ERR = 0x0040, 1645 NETIF_MSG_TX_ERR = 0x0080, 1646 NETIF_MSG_TX_QUEUED = 0x0100, 1647 NETIF_MSG_INTR = 0x0200, 1648 NETIF_MSG_TX_DONE = 0x0400, 1649 NETIF_MSG_RX_STATUS = 0x0800, 1650 NETIF_MSG_PKTDATA = 0x1000, 1651 NETIF_MSG_HW = 0x2000, 1652 NETIF_MSG_WOL = 0x4000, 1653 }; 1654 1655 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1656 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1657 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1658 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1659 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1660 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1661 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1662 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1663 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1664 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1665 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1666 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1667 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1668 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1669 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1670 1671 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1672 { 1673 /* use default */ 1674 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1675 return default_msg_enable_bits; 1676 if (debug_value == 0) /* no output */ 1677 return 0; 1678 /* set low N bits */ 1679 return (1 << debug_value) - 1; 1680 } 1681 1682 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) 1683 { 1684 spin_lock(&txq->_xmit_lock); 1685 txq->xmit_lock_owner = cpu; 1686 } 1687 1688 static inline void __netif_tx_lock_bh(struct netdev_queue *txq) 1689 { 1690 spin_lock_bh(&txq->_xmit_lock); 1691 txq->xmit_lock_owner = smp_processor_id(); 1692 } 1693 1694 static inline int __netif_tx_trylock(struct netdev_queue *txq) 1695 { 1696 int ok = spin_trylock(&txq->_xmit_lock); 1697 if (likely(ok)) 1698 txq->xmit_lock_owner = smp_processor_id(); 1699 return ok; 1700 } 1701 1702 static inline void __netif_tx_unlock(struct netdev_queue *txq) 1703 { 1704 txq->xmit_lock_owner = -1; 1705 spin_unlock(&txq->_xmit_lock); 1706 } 1707 1708 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) 1709 { 1710 txq->xmit_lock_owner = -1; 1711 spin_unlock_bh(&txq->_xmit_lock); 1712 } 1713 1714 static inline void txq_trans_update(struct netdev_queue *txq) 1715 { 1716 if (txq->xmit_lock_owner != -1) 1717 txq->trans_start = jiffies; 1718 } 1719 1720 /** 1721 * netif_tx_lock - grab network device transmit lock 1722 * @dev: network device 1723 * 1724 * Get network device transmit lock 1725 */ 1726 static inline void netif_tx_lock(struct net_device *dev) 1727 { 1728 unsigned int i; 1729 int cpu; 1730 1731 spin_lock(&dev->tx_global_lock); 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 /* We are the only thread of execution doing a 1737 * freeze, but we have to grab the _xmit_lock in 1738 * order to synchronize with threads which are in 1739 * the ->hard_start_xmit() handler and already 1740 * checked the frozen bit. 1741 */ 1742 __netif_tx_lock(txq, cpu); 1743 set_bit(__QUEUE_STATE_FROZEN, &txq->state); 1744 __netif_tx_unlock(txq); 1745 } 1746 } 1747 1748 static inline void netif_tx_lock_bh(struct net_device *dev) 1749 { 1750 local_bh_disable(); 1751 netif_tx_lock(dev); 1752 } 1753 1754 static inline void netif_tx_unlock(struct net_device *dev) 1755 { 1756 unsigned int i; 1757 1758 for (i = 0; i < dev->num_tx_queues; i++) { 1759 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1760 1761 /* No need to grab the _xmit_lock here. If the 1762 * queue is not stopped for another reason, we 1763 * force a schedule. 1764 */ 1765 clear_bit(__QUEUE_STATE_FROZEN, &txq->state); 1766 netif_schedule_queue(txq); 1767 } 1768 spin_unlock(&dev->tx_global_lock); 1769 } 1770 1771 static inline void netif_tx_unlock_bh(struct net_device *dev) 1772 { 1773 netif_tx_unlock(dev); 1774 local_bh_enable(); 1775 } 1776 1777 #define HARD_TX_LOCK(dev, txq, cpu) { \ 1778 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1779 __netif_tx_lock(txq, cpu); \ 1780 } \ 1781 } 1782 1783 #define HARD_TX_UNLOCK(dev, txq) { \ 1784 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1785 __netif_tx_unlock(txq); \ 1786 } \ 1787 } 1788 1789 static inline void netif_tx_disable(struct net_device *dev) 1790 { 1791 unsigned int i; 1792 int cpu; 1793 1794 local_bh_disable(); 1795 cpu = smp_processor_id(); 1796 for (i = 0; i < dev->num_tx_queues; i++) { 1797 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1798 1799 __netif_tx_lock(txq, cpu); 1800 netif_tx_stop_queue(txq); 1801 __netif_tx_unlock(txq); 1802 } 1803 local_bh_enable(); 1804 } 1805 1806 static inline void netif_addr_lock(struct net_device *dev) 1807 { 1808 spin_lock(&dev->addr_list_lock); 1809 } 1810 1811 static inline void netif_addr_lock_bh(struct net_device *dev) 1812 { 1813 spin_lock_bh(&dev->addr_list_lock); 1814 } 1815 1816 static inline void netif_addr_unlock(struct net_device *dev) 1817 { 1818 spin_unlock(&dev->addr_list_lock); 1819 } 1820 1821 static inline void netif_addr_unlock_bh(struct net_device *dev) 1822 { 1823 spin_unlock_bh(&dev->addr_list_lock); 1824 } 1825 1826 /* 1827 * dev_addrs walker. Should be used only for read access. Call with 1828 * rcu_read_lock held. 1829 */ 1830 #define for_each_dev_addr(dev, ha) \ 1831 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) 1832 1833 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1834 1835 extern void ether_setup(struct net_device *dev); 1836 1837 /* Support for loadable net-drivers */ 1838 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1839 void (*setup)(struct net_device *), 1840 unsigned int queue_count); 1841 #define alloc_netdev(sizeof_priv, name, setup) \ 1842 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1843 extern int register_netdev(struct net_device *dev); 1844 extern void unregister_netdev(struct net_device *dev); 1845 1846 /* Functions used for device addresses handling */ 1847 extern int dev_addr_add(struct net_device *dev, unsigned char *addr, 1848 unsigned char addr_type); 1849 extern int dev_addr_del(struct net_device *dev, unsigned char *addr, 1850 unsigned char addr_type); 1851 extern int dev_addr_add_multiple(struct net_device *to_dev, 1852 struct net_device *from_dev, 1853 unsigned char addr_type); 1854 extern int dev_addr_del_multiple(struct net_device *to_dev, 1855 struct net_device *from_dev, 1856 unsigned char addr_type); 1857 1858 /* Functions used for secondary unicast and multicast support */ 1859 extern void dev_set_rx_mode(struct net_device *dev); 1860 extern void __dev_set_rx_mode(struct net_device *dev); 1861 extern int dev_unicast_delete(struct net_device *dev, void *addr); 1862 extern int dev_unicast_add(struct net_device *dev, void *addr); 1863 extern int dev_unicast_sync(struct net_device *to, struct net_device *from); 1864 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); 1865 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1866 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1867 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1868 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1869 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1870 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1871 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1872 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1873 extern int dev_set_promiscuity(struct net_device *dev, int inc); 1874 extern int dev_set_allmulti(struct net_device *dev, int inc); 1875 extern void netdev_state_change(struct net_device *dev); 1876 extern void netdev_bonding_change(struct net_device *dev, 1877 unsigned long event); 1878 extern void netdev_features_change(struct net_device *dev); 1879 /* Load a device via the kmod */ 1880 extern void dev_load(struct net *net, const char *name); 1881 extern void dev_mcast_init(void); 1882 extern const struct net_device_stats *dev_get_stats(struct net_device *dev); 1883 1884 extern int netdev_max_backlog; 1885 extern int weight_p; 1886 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1887 extern int skb_checksum_help(struct sk_buff *skb); 1888 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1889 #ifdef CONFIG_BUG 1890 extern void netdev_rx_csum_fault(struct net_device *dev); 1891 #else 1892 static inline void netdev_rx_csum_fault(struct net_device *dev) 1893 { 1894 } 1895 #endif 1896 /* rx skb timestamps */ 1897 extern void net_enable_timestamp(void); 1898 extern void net_disable_timestamp(void); 1899 1900 #ifdef CONFIG_PROC_FS 1901 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1902 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1903 extern void dev_seq_stop(struct seq_file *seq, void *v); 1904 #endif 1905 1906 extern int netdev_class_create_file(struct class_attribute *class_attr); 1907 extern void netdev_class_remove_file(struct class_attribute *class_attr); 1908 1909 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); 1910 1911 extern void linkwatch_run_queue(void); 1912 1913 unsigned long netdev_increment_features(unsigned long all, unsigned long one, 1914 unsigned long mask); 1915 unsigned long netdev_fix_features(unsigned long features, const char *name); 1916 1917 static inline int net_gso_ok(int features, int gso_type) 1918 { 1919 int feature = gso_type << NETIF_F_GSO_SHIFT; 1920 return (features & feature) == feature; 1921 } 1922 1923 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1924 { 1925 return net_gso_ok(features, skb_shinfo(skb)->gso_type) && 1926 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); 1927 } 1928 1929 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1930 { 1931 return skb_is_gso(skb) && 1932 (!skb_gso_ok(skb, dev->features) || 1933 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1934 } 1935 1936 static inline void netif_set_gso_max_size(struct net_device *dev, 1937 unsigned int size) 1938 { 1939 dev->gso_max_size = size; 1940 } 1941 1942 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb, 1943 struct net_device *master) 1944 { 1945 if (skb->pkt_type == PACKET_HOST) { 1946 u16 *dest = (u16 *) eth_hdr(skb)->h_dest; 1947 1948 memcpy(dest, master->dev_addr, ETH_ALEN); 1949 } 1950 } 1951 1952 /* On bonding slaves other than the currently active slave, suppress 1953 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1954 * ARP on active-backup slaves with arp_validate enabled. 1955 */ 1956 static inline int skb_bond_should_drop(struct sk_buff *skb) 1957 { 1958 struct net_device *dev = skb->dev; 1959 struct net_device *master = dev->master; 1960 1961 if (master) { 1962 if (master->priv_flags & IFF_MASTER_ARPMON) 1963 dev->last_rx = jiffies; 1964 1965 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) { 1966 /* Do address unmangle. The local destination address 1967 * will be always the one master has. Provides the right 1968 * functionality in a bridge. 1969 */ 1970 skb_bond_set_mac_by_master(skb, master); 1971 } 1972 1973 if (dev->priv_flags & IFF_SLAVE_INACTIVE) { 1974 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1975 skb->protocol == __cpu_to_be16(ETH_P_ARP)) 1976 return 0; 1977 1978 if (master->priv_flags & IFF_MASTER_ALB) { 1979 if (skb->pkt_type != PACKET_BROADCAST && 1980 skb->pkt_type != PACKET_MULTICAST) 1981 return 0; 1982 } 1983 if (master->priv_flags & IFF_MASTER_8023AD && 1984 skb->protocol == __cpu_to_be16(ETH_P_SLOW)) 1985 return 0; 1986 1987 return 1; 1988 } 1989 } 1990 return 0; 1991 } 1992 1993 extern struct pernet_operations __net_initdata loopback_net_ops; 1994 1995 static inline int dev_ethtool_get_settings(struct net_device *dev, 1996 struct ethtool_cmd *cmd) 1997 { 1998 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) 1999 return -EOPNOTSUPP; 2000 return dev->ethtool_ops->get_settings(dev, cmd); 2001 } 2002 2003 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) 2004 { 2005 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) 2006 return 0; 2007 return dev->ethtool_ops->get_rx_csum(dev); 2008 } 2009 2010 static inline u32 dev_ethtool_get_flags(struct net_device *dev) 2011 { 2012 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) 2013 return 0; 2014 return dev->ethtool_ops->get_flags(dev); 2015 } 2016 #endif /* __KERNEL__ */ 2017 2018 #endif /* _LINUX_NETDEVICE_H */ 2019