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 #define NET_RX_CN_LOW 2 /* storm alert, just in case */ 76 #define NET_RX_CN_MOD 3 /* Storm on its way! */ 77 #define NET_RX_CN_HIGH 4 /* The storm is here */ 78 #define NET_RX_BAD 5 /* packet dropped due to kernel error */ 79 80 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It 81 * indicates that the device will soon be dropping packets, or already drops 82 * some packets of the same priority; prompting us to send less aggressively. */ 83 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) 84 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) 85 86 #endif 87 88 #define MAX_ADDR_LEN 32 /* Largest hardware address length */ 89 90 /* Driver transmit return codes */ 91 #define NETDEV_TX_OK 0 /* driver took care of packet */ 92 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ 93 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ 94 95 #ifdef __KERNEL__ 96 97 /* 98 * Compute the worst case header length according to the protocols 99 * used. 100 */ 101 102 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 103 # if defined(CONFIG_MAC80211_MESH) 104 # define LL_MAX_HEADER 128 105 # else 106 # define LL_MAX_HEADER 96 107 # endif 108 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) 109 # define LL_MAX_HEADER 48 110 #else 111 # define LL_MAX_HEADER 32 112 #endif 113 114 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ 115 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ 116 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ 117 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) 118 #define MAX_HEADER LL_MAX_HEADER 119 #else 120 #define MAX_HEADER (LL_MAX_HEADER + 48) 121 #endif 122 123 #endif /* __KERNEL__ */ 124 125 /* 126 * Network device statistics. Akin to the 2.0 ether stats but 127 * with byte counters. 128 */ 129 130 struct net_device_stats 131 { 132 unsigned long rx_packets; /* total packets received */ 133 unsigned long tx_packets; /* total packets transmitted */ 134 unsigned long rx_bytes; /* total bytes received */ 135 unsigned long tx_bytes; /* total bytes transmitted */ 136 unsigned long rx_errors; /* bad packets received */ 137 unsigned long tx_errors; /* packet transmit problems */ 138 unsigned long rx_dropped; /* no space in linux buffers */ 139 unsigned long tx_dropped; /* no space available in linux */ 140 unsigned long multicast; /* multicast packets received */ 141 unsigned long collisions; 142 143 /* detailed rx_errors: */ 144 unsigned long rx_length_errors; 145 unsigned long rx_over_errors; /* receiver ring buff overflow */ 146 unsigned long rx_crc_errors; /* recved pkt with crc error */ 147 unsigned long rx_frame_errors; /* recv'd frame alignment error */ 148 unsigned long rx_fifo_errors; /* recv'r fifo overrun */ 149 unsigned long rx_missed_errors; /* receiver missed packet */ 150 151 /* detailed tx_errors */ 152 unsigned long tx_aborted_errors; 153 unsigned long tx_carrier_errors; 154 unsigned long tx_fifo_errors; 155 unsigned long tx_heartbeat_errors; 156 unsigned long tx_window_errors; 157 158 /* for cslip etc */ 159 unsigned long rx_compressed; 160 unsigned long tx_compressed; 161 }; 162 163 164 /* Media selection options. */ 165 enum { 166 IF_PORT_UNKNOWN = 0, 167 IF_PORT_10BASE2, 168 IF_PORT_10BASET, 169 IF_PORT_AUI, 170 IF_PORT_100BASET, 171 IF_PORT_100BASETX, 172 IF_PORT_100BASEFX 173 }; 174 175 #ifdef __KERNEL__ 176 177 #include <linux/cache.h> 178 #include <linux/skbuff.h> 179 180 struct neighbour; 181 struct neigh_parms; 182 struct sk_buff; 183 184 struct netif_rx_stats 185 { 186 unsigned total; 187 unsigned dropped; 188 unsigned time_squeeze; 189 unsigned cpu_collision; 190 }; 191 192 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); 193 194 struct dev_addr_list 195 { 196 struct dev_addr_list *next; 197 u8 da_addr[MAX_ADDR_LEN]; 198 u8 da_addrlen; 199 u8 da_synced; 200 int da_users; 201 int da_gusers; 202 }; 203 204 /* 205 * We tag multicasts with these structures. 206 */ 207 208 #define dev_mc_list dev_addr_list 209 #define dmi_addr da_addr 210 #define dmi_addrlen da_addrlen 211 #define dmi_users da_users 212 #define dmi_gusers da_gusers 213 214 struct netdev_hw_addr { 215 struct list_head list; 216 unsigned char addr[MAX_ADDR_LEN]; 217 unsigned char type; 218 #define NETDEV_HW_ADDR_T_LAN 1 219 #define NETDEV_HW_ADDR_T_SAN 2 220 #define NETDEV_HW_ADDR_T_SLAVE 3 221 #define NETDEV_HW_ADDR_T_UNICAST 4 222 int refcount; 223 bool synced; 224 struct rcu_head rcu_head; 225 }; 226 227 struct netdev_hw_addr_list { 228 struct list_head list; 229 int count; 230 }; 231 232 struct hh_cache 233 { 234 struct hh_cache *hh_next; /* Next entry */ 235 atomic_t hh_refcnt; /* number of users */ 236 /* 237 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate 238 * cache line on SMP. 239 * They are mostly read, but hh_refcnt may be changed quite frequently, 240 * incurring cache line ping pongs. 241 */ 242 __be16 hh_type ____cacheline_aligned_in_smp; 243 /* protocol identifier, f.e ETH_P_IP 244 * NOTE: For VLANs, this will be the 245 * encapuslated type. --BLG 246 */ 247 u16 hh_len; /* length of header */ 248 int (*hh_output)(struct sk_buff *skb); 249 seqlock_t hh_lock; 250 251 /* cached hardware header; allow for machine alignment needs. */ 252 #define HH_DATA_MOD 16 253 #define HH_DATA_OFF(__len) \ 254 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) 255 #define HH_DATA_ALIGN(__len) \ 256 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) 257 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; 258 }; 259 260 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. 261 * Alternative is: 262 * dev->hard_header_len ? (dev->hard_header_len + 263 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 264 * 265 * We could use other alignment values, but we must maintain the 266 * relationship HH alignment <= LL alignment. 267 * 268 * LL_ALLOCATED_SPACE also takes into account the tailroom the device 269 * may need. 270 */ 271 #define LL_RESERVED_SPACE(dev) \ 272 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 273 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ 274 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 275 #define LL_ALLOCATED_SPACE(dev) \ 276 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 277 278 struct header_ops { 279 int (*create) (struct sk_buff *skb, struct net_device *dev, 280 unsigned short type, const void *daddr, 281 const void *saddr, unsigned len); 282 int (*parse)(const struct sk_buff *skb, unsigned char *haddr); 283 int (*rebuild)(struct sk_buff *skb); 284 #define HAVE_HEADER_CACHE 285 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); 286 void (*cache_update)(struct hh_cache *hh, 287 const struct net_device *dev, 288 const unsigned char *haddr); 289 }; 290 291 /* These flag bits are private to the generic network queueing 292 * layer, they may not be explicitly referenced by any other 293 * code. 294 */ 295 296 enum netdev_state_t 297 { 298 __LINK_STATE_START, 299 __LINK_STATE_PRESENT, 300 __LINK_STATE_NOCARRIER, 301 __LINK_STATE_LINKWATCH_PENDING, 302 __LINK_STATE_DORMANT, 303 }; 304 305 306 /* 307 * This structure holds at boot time configured netdevice settings. They 308 * are then used in the device probing. 309 */ 310 struct netdev_boot_setup { 311 char name[IFNAMSIZ]; 312 struct ifmap map; 313 }; 314 #define NETDEV_BOOT_SETUP_MAX 8 315 316 extern int __init netdev_boot_setup(char *str); 317 318 /* 319 * Structure for NAPI scheduling similar to tasklet but with weighting 320 */ 321 struct napi_struct { 322 /* The poll_list must only be managed by the entity which 323 * changes the state of the NAPI_STATE_SCHED bit. This means 324 * whoever atomically sets that bit can add this napi_struct 325 * to the per-cpu poll_list, and whoever clears that bit 326 * can remove from the list right before clearing the bit. 327 */ 328 struct list_head poll_list; 329 330 unsigned long state; 331 int weight; 332 int (*poll)(struct napi_struct *, int); 333 #ifdef CONFIG_NETPOLL 334 spinlock_t poll_lock; 335 int poll_owner; 336 #endif 337 338 unsigned int gro_count; 339 340 struct net_device *dev; 341 struct list_head dev_list; 342 struct sk_buff *gro_list; 343 struct sk_buff *skb; 344 }; 345 346 enum 347 { 348 NAPI_STATE_SCHED, /* Poll is scheduled */ 349 NAPI_STATE_DISABLE, /* Disable pending */ 350 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ 351 }; 352 353 enum { 354 GRO_MERGED, 355 GRO_MERGED_FREE, 356 GRO_HELD, 357 GRO_NORMAL, 358 GRO_DROP, 359 }; 360 361 extern void __napi_schedule(struct napi_struct *n); 362 363 static inline int napi_disable_pending(struct napi_struct *n) 364 { 365 return test_bit(NAPI_STATE_DISABLE, &n->state); 366 } 367 368 /** 369 * napi_schedule_prep - check if napi can be scheduled 370 * @n: napi context 371 * 372 * Test if NAPI routine is already running, and if not mark 373 * it as running. This is used as a condition variable 374 * insure only one NAPI poll instance runs. We also make 375 * sure there is no pending NAPI disable. 376 */ 377 static inline int napi_schedule_prep(struct napi_struct *n) 378 { 379 return !napi_disable_pending(n) && 380 !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 381 } 382 383 /** 384 * napi_schedule - schedule NAPI poll 385 * @n: napi context 386 * 387 * Schedule NAPI poll routine to be called if it is not already 388 * running. 389 */ 390 static inline void napi_schedule(struct napi_struct *n) 391 { 392 if (napi_schedule_prep(n)) 393 __napi_schedule(n); 394 } 395 396 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 397 static inline int napi_reschedule(struct napi_struct *napi) 398 { 399 if (napi_schedule_prep(napi)) { 400 __napi_schedule(napi); 401 return 1; 402 } 403 return 0; 404 } 405 406 /** 407 * napi_complete - NAPI processing complete 408 * @n: napi context 409 * 410 * Mark NAPI processing as complete. 411 */ 412 extern void __napi_complete(struct napi_struct *n); 413 extern void napi_complete(struct napi_struct *n); 414 415 /** 416 * napi_disable - prevent NAPI from scheduling 417 * @n: napi context 418 * 419 * Stop NAPI from being scheduled on this context. 420 * Waits till any outstanding processing completes. 421 */ 422 static inline void napi_disable(struct napi_struct *n) 423 { 424 set_bit(NAPI_STATE_DISABLE, &n->state); 425 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 426 msleep(1); 427 clear_bit(NAPI_STATE_DISABLE, &n->state); 428 } 429 430 /** 431 * napi_enable - enable NAPI scheduling 432 * @n: napi context 433 * 434 * Resume NAPI from being scheduled on this context. 435 * Must be paired with napi_disable. 436 */ 437 static inline void napi_enable(struct napi_struct *n) 438 { 439 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 440 smp_mb__before_clear_bit(); 441 clear_bit(NAPI_STATE_SCHED, &n->state); 442 } 443 444 #ifdef CONFIG_SMP 445 /** 446 * napi_synchronize - wait until NAPI is not running 447 * @n: napi context 448 * 449 * Wait until NAPI is done being scheduled on this context. 450 * Waits till any outstanding processing completes but 451 * does not disable future activations. 452 */ 453 static inline void napi_synchronize(const struct napi_struct *n) 454 { 455 while (test_bit(NAPI_STATE_SCHED, &n->state)) 456 msleep(1); 457 } 458 #else 459 # define napi_synchronize(n) barrier() 460 #endif 461 462 enum netdev_queue_state_t 463 { 464 __QUEUE_STATE_XOFF, 465 __QUEUE_STATE_FROZEN, 466 }; 467 468 struct netdev_queue { 469 /* 470 * read mostly part 471 */ 472 struct net_device *dev; 473 struct Qdisc *qdisc; 474 unsigned long state; 475 struct Qdisc *qdisc_sleeping; 476 /* 477 * write mostly part 478 */ 479 spinlock_t _xmit_lock ____cacheline_aligned_in_smp; 480 int xmit_lock_owner; 481 /* 482 * please use this field instead of dev->trans_start 483 */ 484 unsigned long trans_start; 485 unsigned long tx_bytes; 486 unsigned long tx_packets; 487 unsigned long tx_dropped; 488 } ____cacheline_aligned_in_smp; 489 490 491 /* 492 * This structure defines the management hooks for network devices. 493 * The following hooks can be defined; unless noted otherwise, they are 494 * optional and can be filled with a null pointer. 495 * 496 * int (*ndo_init)(struct net_device *dev); 497 * This function is called once when network device is registered. 498 * The network device can use this to any late stage initializaton 499 * or semantic validattion. It can fail with an error code which will 500 * be propogated back to register_netdev 501 * 502 * void (*ndo_uninit)(struct net_device *dev); 503 * This function is called when device is unregistered or when registration 504 * fails. It is not called if init fails. 505 * 506 * int (*ndo_open)(struct net_device *dev); 507 * This function is called when network device transistions to the up 508 * state. 509 * 510 * int (*ndo_stop)(struct net_device *dev); 511 * This function is called when network device transistions to the down 512 * state. 513 * 514 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev); 515 * Called when a packet needs to be transmitted. 516 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED, 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 int (*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_ddp_setup)(struct net_device *dev, 631 u16 xid, 632 struct scatterlist *sgl, 633 unsigned int sgc); 634 int (*ndo_fcoe_ddp_done)(struct net_device *dev, 635 u16 xid); 636 #endif 637 }; 638 639 /* 640 * The DEVICE structure. 641 * Actually, this whole structure is a big mistake. It mixes I/O 642 * data with strictly "high-level" data, and it has to know about 643 * almost every data structure used in the INET module. 644 * 645 * FIXME: cleanup struct net_device such that network protocol info 646 * moves out. 647 */ 648 649 struct net_device 650 { 651 652 /* 653 * This is the first field of the "visible" part of this structure 654 * (i.e. as seen by users in the "Space.c" file). It is the name 655 * the interface. 656 */ 657 char name[IFNAMSIZ]; 658 /* device name hash chain */ 659 struct hlist_node name_hlist; 660 /* snmp alias */ 661 char *ifalias; 662 663 /* 664 * I/O specific fields 665 * FIXME: Merge these and struct ifmap into one 666 */ 667 unsigned long mem_end; /* shared mem end */ 668 unsigned long mem_start; /* shared mem start */ 669 unsigned long base_addr; /* device I/O address */ 670 unsigned int irq; /* device IRQ number */ 671 672 /* 673 * Some hardware also needs these fields, but they are not 674 * part of the usual set specified in Space.c. 675 */ 676 677 unsigned char if_port; /* Selectable AUI, TP,..*/ 678 unsigned char dma; /* DMA channel */ 679 680 unsigned long state; 681 682 struct list_head dev_list; 683 struct list_head napi_list; 684 685 /* Net device features */ 686 unsigned long features; 687 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 688 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 689 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 690 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 691 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 692 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 693 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 694 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 695 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 696 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 697 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 698 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 699 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 700 /* do not use LLTX in new drivers */ 701 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 702 #define NETIF_F_GRO 16384 /* Generic receive offload */ 703 #define NETIF_F_LRO 32768 /* large receive offload */ 704 705 /* the GSO_MASK reserves bits 16 through 23 */ 706 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ 707 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ 708 709 /* Segmentation offload features */ 710 #define NETIF_F_GSO_SHIFT 16 711 #define NETIF_F_GSO_MASK 0x00ff0000 712 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 713 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 714 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 715 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 716 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 717 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) 718 719 /* List of features with software fallbacks. */ 720 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 721 722 723 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 724 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 725 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 726 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 727 728 /* 729 * If one device supports one of these features, then enable them 730 * for all in netdev_increment_features. 731 */ 732 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ 733 NETIF_F_SG | NETIF_F_HIGHDMA | \ 734 NETIF_F_FRAGLIST) 735 736 /* Interface index. Unique device identifier */ 737 int ifindex; 738 int iflink; 739 740 struct net_device_stats stats; 741 742 #ifdef CONFIG_WIRELESS_EXT 743 /* List of functions to handle Wireless Extensions (instead of ioctl). 744 * See <net/iw_handler.h> for details. Jean II */ 745 const struct iw_handler_def * wireless_handlers; 746 /* Instance data managed by the core of Wireless Extensions. */ 747 struct iw_public_data * wireless_data; 748 #endif 749 /* Management operations */ 750 const struct net_device_ops *netdev_ops; 751 const struct ethtool_ops *ethtool_ops; 752 753 /* Hardware header description */ 754 const struct header_ops *header_ops; 755 756 unsigned int flags; /* interface flags (a la BSD) */ 757 unsigned short gflags; 758 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 759 unsigned short padded; /* How much padding added by alloc_netdev() */ 760 761 unsigned char operstate; /* RFC2863 operstate */ 762 unsigned char link_mode; /* mapping policy to operstate */ 763 764 unsigned mtu; /* interface MTU value */ 765 unsigned short type; /* interface hardware type */ 766 unsigned short hard_header_len; /* hardware hdr length */ 767 768 /* extra head- and tailroom the hardware may need, but not in all cases 769 * can this be guaranteed, especially tailroom. Some cases also use 770 * LL_MAX_HEADER instead to allocate the skb. 771 */ 772 unsigned short needed_headroom; 773 unsigned short needed_tailroom; 774 775 struct net_device *master; /* Pointer to master device of a group, 776 * which this device is member of. 777 */ 778 779 /* Interface address info. */ 780 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 781 unsigned char addr_len; /* hardware address length */ 782 unsigned short dev_id; /* for shared network cards */ 783 784 struct netdev_hw_addr_list uc; /* Secondary unicast 785 mac addresses */ 786 int uc_promisc; 787 spinlock_t addr_list_lock; 788 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 789 int mc_count; /* Number of installed mcasts */ 790 unsigned int promiscuity; 791 unsigned int allmulti; 792 793 794 /* Protocol specific pointers */ 795 796 #ifdef CONFIG_NET_DSA 797 void *dsa_ptr; /* dsa specific data */ 798 #endif 799 void *atalk_ptr; /* AppleTalk link */ 800 void *ip_ptr; /* IPv4 specific data */ 801 void *dn_ptr; /* DECnet specific data */ 802 void *ip6_ptr; /* IPv6 specific data */ 803 void *ec_ptr; /* Econet specific data */ 804 void *ax25_ptr; /* AX.25 specific data */ 805 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 806 assign before registering */ 807 808 /* 809 * Cache line mostly used on receive path (including eth_type_trans()) 810 */ 811 unsigned long last_rx; /* Time of last Rx */ 812 /* Interface address info used in eth_type_trans() */ 813 unsigned char *dev_addr; /* hw address, (before bcast 814 because most packets are 815 unicast) */ 816 817 struct netdev_hw_addr_list dev_addrs; /* list of device 818 hw addresses */ 819 820 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 821 822 struct netdev_queue rx_queue; 823 824 struct netdev_queue *_tx ____cacheline_aligned_in_smp; 825 826 /* Number of TX queues allocated at alloc_netdev_mq() time */ 827 unsigned int num_tx_queues; 828 829 /* Number of TX queues currently active in device */ 830 unsigned int real_num_tx_queues; 831 832 unsigned long tx_queue_len; /* Max frames per queue allowed */ 833 spinlock_t tx_global_lock; 834 /* 835 * One part is mostly used on xmit path (device) 836 */ 837 /* These may be needed for future network-power-down code. */ 838 839 /* 840 * trans_start here is expensive for high speed devices on SMP, 841 * please use netdev_queue->trans_start instead. 842 */ 843 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 844 845 int watchdog_timeo; /* used by dev_watchdog() */ 846 struct timer_list watchdog_timer; 847 848 /* Number of references to this device */ 849 atomic_t refcnt ____cacheline_aligned_in_smp; 850 851 /* delayed register/unregister */ 852 struct list_head todo_list; 853 /* device index hash chain */ 854 struct hlist_node index_hlist; 855 856 struct net_device *link_watch_next; 857 858 /* register/unregister state machine */ 859 enum { NETREG_UNINITIALIZED=0, 860 NETREG_REGISTERED, /* completed register_netdevice */ 861 NETREG_UNREGISTERING, /* called unregister_netdevice */ 862 NETREG_UNREGISTERED, /* completed unregister todo */ 863 NETREG_RELEASED, /* called free_netdev */ 864 NETREG_DUMMY, /* dummy device for NAPI poll */ 865 } reg_state; 866 867 /* Called from unregister, can be used to call free_netdev */ 868 void (*destructor)(struct net_device *dev); 869 870 #ifdef CONFIG_NETPOLL 871 struct netpoll_info *npinfo; 872 #endif 873 874 #ifdef CONFIG_NET_NS 875 /* Network namespace this network device is inside */ 876 struct net *nd_net; 877 #endif 878 879 /* mid-layer private */ 880 void *ml_priv; 881 882 /* bridge stuff */ 883 struct net_bridge_port *br_port; 884 /* macvlan */ 885 struct macvlan_port *macvlan_port; 886 /* GARP */ 887 struct garp_port *garp_port; 888 889 /* class/net/name entry */ 890 struct device dev; 891 /* space for optional statistics and wireless sysfs groups */ 892 struct attribute_group *sysfs_groups[3]; 893 894 /* rtnetlink link ops */ 895 const struct rtnl_link_ops *rtnl_link_ops; 896 897 /* VLAN feature mask */ 898 unsigned long vlan_features; 899 900 /* for setting kernel sock attribute on TCP connection setup */ 901 #define GSO_MAX_SIZE 65536 902 unsigned int gso_max_size; 903 904 #ifdef CONFIG_DCB 905 /* Data Center Bridging netlink ops */ 906 struct dcbnl_rtnl_ops *dcbnl_ops; 907 #endif 908 909 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 910 /* max exchange id for FCoE LRO by ddp */ 911 unsigned int fcoe_ddp_xid; 912 #endif 913 }; 914 #define to_net_dev(d) container_of(d, struct net_device, dev) 915 916 #define NETDEV_ALIGN 32 917 918 static inline 919 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, 920 unsigned int index) 921 { 922 return &dev->_tx[index]; 923 } 924 925 static inline void netdev_for_each_tx_queue(struct net_device *dev, 926 void (*f)(struct net_device *, 927 struct netdev_queue *, 928 void *), 929 void *arg) 930 { 931 unsigned int i; 932 933 for (i = 0; i < dev->num_tx_queues; i++) 934 f(dev, &dev->_tx[i], arg); 935 } 936 937 /* 938 * Net namespace inlines 939 */ 940 static inline 941 struct net *dev_net(const struct net_device *dev) 942 { 943 #ifdef CONFIG_NET_NS 944 return dev->nd_net; 945 #else 946 return &init_net; 947 #endif 948 } 949 950 static inline 951 void dev_net_set(struct net_device *dev, struct net *net) 952 { 953 #ifdef CONFIG_NET_NS 954 release_net(dev->nd_net); 955 dev->nd_net = hold_net(net); 956 #endif 957 } 958 959 static inline bool netdev_uses_dsa_tags(struct net_device *dev) 960 { 961 #ifdef CONFIG_NET_DSA_TAG_DSA 962 if (dev->dsa_ptr != NULL) 963 return dsa_uses_dsa_tags(dev->dsa_ptr); 964 #endif 965 966 return 0; 967 } 968 969 static inline bool netdev_uses_trailer_tags(struct net_device *dev) 970 { 971 #ifdef CONFIG_NET_DSA_TAG_TRAILER 972 if (dev->dsa_ptr != NULL) 973 return dsa_uses_trailer_tags(dev->dsa_ptr); 974 #endif 975 976 return 0; 977 } 978 979 /** 980 * netdev_priv - access network device private data 981 * @dev: network device 982 * 983 * Get network device private data 984 */ 985 static inline void *netdev_priv(const struct net_device *dev) 986 { 987 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); 988 } 989 990 /* Set the sysfs physical device reference for the network logical device 991 * if set prior to registration will cause a symlink during initialization. 992 */ 993 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 994 995 /** 996 * netif_napi_add - initialize a napi context 997 * @dev: network device 998 * @napi: napi context 999 * @poll: polling function 1000 * @weight: default weight 1001 * 1002 * netif_napi_add() must be used to initialize a napi context prior to calling 1003 * *any* of the other napi related functions. 1004 */ 1005 void netif_napi_add(struct net_device *dev, struct napi_struct *napi, 1006 int (*poll)(struct napi_struct *, int), int weight); 1007 1008 /** 1009 * netif_napi_del - remove a napi context 1010 * @napi: napi context 1011 * 1012 * netif_napi_del() removes a napi context from the network device napi list 1013 */ 1014 void netif_napi_del(struct napi_struct *napi); 1015 1016 struct napi_gro_cb { 1017 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ 1018 void *frag0; 1019 1020 /* Length of frag0. */ 1021 unsigned int frag0_len; 1022 1023 /* This indicates where we are processing relative to skb->data. */ 1024 int data_offset; 1025 1026 /* This is non-zero if the packet may be of the same flow. */ 1027 int same_flow; 1028 1029 /* This is non-zero if the packet cannot be merged with the new skb. */ 1030 int flush; 1031 1032 /* Number of segments aggregated. */ 1033 int count; 1034 1035 /* Free the skb? */ 1036 int free; 1037 }; 1038 1039 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) 1040 1041 struct packet_type { 1042 __be16 type; /* This is really htons(ether_type). */ 1043 struct net_device *dev; /* NULL is wildcarded here */ 1044 int (*func) (struct sk_buff *, 1045 struct net_device *, 1046 struct packet_type *, 1047 struct net_device *); 1048 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 1049 int features); 1050 int (*gso_send_check)(struct sk_buff *skb); 1051 struct sk_buff **(*gro_receive)(struct sk_buff **head, 1052 struct sk_buff *skb); 1053 int (*gro_complete)(struct sk_buff *skb); 1054 void *af_packet_priv; 1055 struct list_head list; 1056 }; 1057 1058 #include <linux/interrupt.h> 1059 #include <linux/notifier.h> 1060 1061 extern rwlock_t dev_base_lock; /* Device list lock */ 1062 1063 1064 #define for_each_netdev(net, d) \ 1065 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 1066 #define for_each_netdev_safe(net, d, n) \ 1067 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 1068 #define for_each_netdev_continue(net, d) \ 1069 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 1070 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 1071 1072 static inline struct net_device *next_net_device(struct net_device *dev) 1073 { 1074 struct list_head *lh; 1075 struct net *net; 1076 1077 net = dev_net(dev); 1078 lh = dev->dev_list.next; 1079 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 1080 } 1081 1082 static inline struct net_device *first_net_device(struct net *net) 1083 { 1084 return list_empty(&net->dev_base_head) ? NULL : 1085 net_device_entry(net->dev_base_head.next); 1086 } 1087 1088 extern int netdev_boot_setup_check(struct net_device *dev); 1089 extern unsigned long netdev_boot_base(const char *prefix, int unit); 1090 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 1091 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 1092 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 1093 extern void dev_add_pack(struct packet_type *pt); 1094 extern void dev_remove_pack(struct packet_type *pt); 1095 extern void __dev_remove_pack(struct packet_type *pt); 1096 1097 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 1098 unsigned short mask); 1099 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 1100 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 1101 extern int dev_alloc_name(struct net_device *dev, const char *name); 1102 extern int dev_open(struct net_device *dev); 1103 extern int dev_close(struct net_device *dev); 1104 extern void dev_disable_lro(struct net_device *dev); 1105 extern int dev_queue_xmit(struct sk_buff *skb); 1106 extern int register_netdevice(struct net_device *dev); 1107 extern void unregister_netdevice(struct net_device *dev); 1108 extern void free_netdev(struct net_device *dev); 1109 extern void synchronize_net(void); 1110 extern int register_netdevice_notifier(struct notifier_block *nb); 1111 extern int unregister_netdevice_notifier(struct notifier_block *nb); 1112 extern int init_dummy_netdev(struct net_device *dev); 1113 extern void netdev_resync_ops(struct net_device *dev); 1114 1115 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 1116 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 1117 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 1118 extern int dev_restart(struct net_device *dev); 1119 #ifdef CONFIG_NETPOLL_TRAP 1120 extern int netpoll_trap(void); 1121 #endif 1122 extern int skb_gro_receive(struct sk_buff **head, 1123 struct sk_buff *skb); 1124 extern void skb_gro_reset_offset(struct sk_buff *skb); 1125 1126 static inline unsigned int skb_gro_offset(const struct sk_buff *skb) 1127 { 1128 return NAPI_GRO_CB(skb)->data_offset; 1129 } 1130 1131 static inline unsigned int skb_gro_len(const struct sk_buff *skb) 1132 { 1133 return skb->len - NAPI_GRO_CB(skb)->data_offset; 1134 } 1135 1136 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) 1137 { 1138 NAPI_GRO_CB(skb)->data_offset += len; 1139 } 1140 1141 static inline void *skb_gro_header_fast(struct sk_buff *skb, 1142 unsigned int offset) 1143 { 1144 return NAPI_GRO_CB(skb)->frag0 + offset; 1145 } 1146 1147 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) 1148 { 1149 return NAPI_GRO_CB(skb)->frag0_len < hlen; 1150 } 1151 1152 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, 1153 unsigned int offset) 1154 { 1155 NAPI_GRO_CB(skb)->frag0 = NULL; 1156 NAPI_GRO_CB(skb)->frag0_len = 0; 1157 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; 1158 } 1159 1160 static inline void *skb_gro_mac_header(struct sk_buff *skb) 1161 { 1162 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); 1163 } 1164 1165 static inline void *skb_gro_network_header(struct sk_buff *skb) 1166 { 1167 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + 1168 skb_network_offset(skb); 1169 } 1170 1171 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 1172 unsigned short type, 1173 const void *daddr, const void *saddr, 1174 unsigned len) 1175 { 1176 if (!dev->header_ops || !dev->header_ops->create) 1177 return 0; 1178 1179 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 1180 } 1181 1182 static inline int dev_parse_header(const struct sk_buff *skb, 1183 unsigned char *haddr) 1184 { 1185 const struct net_device *dev = skb->dev; 1186 1187 if (!dev->header_ops || !dev->header_ops->parse) 1188 return 0; 1189 return dev->header_ops->parse(skb, haddr); 1190 } 1191 1192 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 1193 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 1194 static inline int unregister_gifconf(unsigned int family) 1195 { 1196 return register_gifconf(family, NULL); 1197 } 1198 1199 /* 1200 * Incoming packets are placed on per-cpu queues so that 1201 * no locking is needed. 1202 */ 1203 struct softnet_data 1204 { 1205 struct Qdisc *output_queue; 1206 struct sk_buff_head input_pkt_queue; 1207 struct list_head poll_list; 1208 struct sk_buff *completion_queue; 1209 1210 struct napi_struct backlog; 1211 }; 1212 1213 DECLARE_PER_CPU(struct softnet_data,softnet_data); 1214 1215 #define HAVE_NETIF_QUEUE 1216 1217 extern void __netif_schedule(struct Qdisc *q); 1218 1219 static inline void netif_schedule_queue(struct netdev_queue *txq) 1220 { 1221 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1222 __netif_schedule(txq->qdisc); 1223 } 1224 1225 static inline void netif_tx_schedule_all(struct net_device *dev) 1226 { 1227 unsigned int i; 1228 1229 for (i = 0; i < dev->num_tx_queues; i++) 1230 netif_schedule_queue(netdev_get_tx_queue(dev, i)); 1231 } 1232 1233 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) 1234 { 1235 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1236 } 1237 1238 /** 1239 * netif_start_queue - allow transmit 1240 * @dev: network device 1241 * 1242 * Allow upper layers to call the device hard_start_xmit routine. 1243 */ 1244 static inline void netif_start_queue(struct net_device *dev) 1245 { 1246 netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); 1247 } 1248 1249 static inline void netif_tx_start_all_queues(struct net_device *dev) 1250 { 1251 unsigned int i; 1252 1253 for (i = 0; i < dev->num_tx_queues; i++) { 1254 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1255 netif_tx_start_queue(txq); 1256 } 1257 } 1258 1259 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) 1260 { 1261 #ifdef CONFIG_NETPOLL_TRAP 1262 if (netpoll_trap()) { 1263 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1264 return; 1265 } 1266 #endif 1267 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) 1268 __netif_schedule(dev_queue->qdisc); 1269 } 1270 1271 /** 1272 * netif_wake_queue - restart transmit 1273 * @dev: network device 1274 * 1275 * Allow upper layers to call the device hard_start_xmit routine. 1276 * Used for flow control when transmit resources are available. 1277 */ 1278 static inline void netif_wake_queue(struct net_device *dev) 1279 { 1280 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); 1281 } 1282 1283 static inline void netif_tx_wake_all_queues(struct net_device *dev) 1284 { 1285 unsigned int i; 1286 1287 for (i = 0; i < dev->num_tx_queues; i++) { 1288 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1289 netif_tx_wake_queue(txq); 1290 } 1291 } 1292 1293 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) 1294 { 1295 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1296 } 1297 1298 /** 1299 * netif_stop_queue - stop transmitted packets 1300 * @dev: network device 1301 * 1302 * Stop upper layers calling the device hard_start_xmit routine. 1303 * Used for flow control when transmit resources are unavailable. 1304 */ 1305 static inline void netif_stop_queue(struct net_device *dev) 1306 { 1307 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); 1308 } 1309 1310 static inline void netif_tx_stop_all_queues(struct net_device *dev) 1311 { 1312 unsigned int i; 1313 1314 for (i = 0; i < dev->num_tx_queues; i++) { 1315 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1316 netif_tx_stop_queue(txq); 1317 } 1318 } 1319 1320 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) 1321 { 1322 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1323 } 1324 1325 /** 1326 * netif_queue_stopped - test if transmit queue is flowblocked 1327 * @dev: network device 1328 * 1329 * Test if transmit queue on device is currently unable to send. 1330 */ 1331 static inline int netif_queue_stopped(const struct net_device *dev) 1332 { 1333 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); 1334 } 1335 1336 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) 1337 { 1338 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); 1339 } 1340 1341 /** 1342 * netif_running - test if up 1343 * @dev: network device 1344 * 1345 * Test if the device has been brought up. 1346 */ 1347 static inline int netif_running(const struct net_device *dev) 1348 { 1349 return test_bit(__LINK_STATE_START, &dev->state); 1350 } 1351 1352 /* 1353 * Routines to manage the subqueues on a device. We only need start 1354 * stop, and a check if it's stopped. All other device management is 1355 * done at the overall netdevice level. 1356 * Also test the device if we're multiqueue. 1357 */ 1358 1359 /** 1360 * netif_start_subqueue - allow sending packets on subqueue 1361 * @dev: network device 1362 * @queue_index: sub queue index 1363 * 1364 * Start individual transmit queue of a device with multiple transmit queues. 1365 */ 1366 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1367 { 1368 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1369 clear_bit(__QUEUE_STATE_XOFF, &txq->state); 1370 } 1371 1372 /** 1373 * netif_stop_subqueue - stop sending packets on subqueue 1374 * @dev: network device 1375 * @queue_index: sub queue index 1376 * 1377 * Stop individual transmit queue of a device with multiple transmit queues. 1378 */ 1379 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1380 { 1381 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1382 #ifdef CONFIG_NETPOLL_TRAP 1383 if (netpoll_trap()) 1384 return; 1385 #endif 1386 set_bit(__QUEUE_STATE_XOFF, &txq->state); 1387 } 1388 1389 /** 1390 * netif_subqueue_stopped - test status of subqueue 1391 * @dev: network device 1392 * @queue_index: sub queue index 1393 * 1394 * Check individual transmit queue of a device with multiple transmit queues. 1395 */ 1396 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1397 u16 queue_index) 1398 { 1399 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1400 return test_bit(__QUEUE_STATE_XOFF, &txq->state); 1401 } 1402 1403 static inline int netif_subqueue_stopped(const struct net_device *dev, 1404 struct sk_buff *skb) 1405 { 1406 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1407 } 1408 1409 /** 1410 * netif_wake_subqueue - allow sending packets on subqueue 1411 * @dev: network device 1412 * @queue_index: sub queue index 1413 * 1414 * Resume individual transmit queue of a device with multiple transmit queues. 1415 */ 1416 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1417 { 1418 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1419 #ifdef CONFIG_NETPOLL_TRAP 1420 if (netpoll_trap()) 1421 return; 1422 #endif 1423 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) 1424 __netif_schedule(txq->qdisc); 1425 } 1426 1427 /** 1428 * netif_is_multiqueue - test if device has multiple transmit queues 1429 * @dev: network device 1430 * 1431 * Check if device has multiple transmit queues 1432 */ 1433 static inline int netif_is_multiqueue(const struct net_device *dev) 1434 { 1435 return (dev->num_tx_queues > 1); 1436 } 1437 1438 /* Use this variant when it is known for sure that it 1439 * is executing from hardware interrupt context or with hardware interrupts 1440 * disabled. 1441 */ 1442 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1443 1444 /* Use this variant in places where it could be invoked 1445 * from either hardware interrupt or other context, with hardware interrupts 1446 * either disabled or enabled. 1447 */ 1448 extern void dev_kfree_skb_any(struct sk_buff *skb); 1449 1450 #define HAVE_NETIF_RX 1 1451 extern int netif_rx(struct sk_buff *skb); 1452 extern int netif_rx_ni(struct sk_buff *skb); 1453 #define HAVE_NETIF_RECEIVE_SKB 1 1454 extern int netif_receive_skb(struct sk_buff *skb); 1455 extern void napi_gro_flush(struct napi_struct *napi); 1456 extern int dev_gro_receive(struct napi_struct *napi, 1457 struct sk_buff *skb); 1458 extern int napi_skb_finish(int ret, struct sk_buff *skb); 1459 extern int napi_gro_receive(struct napi_struct *napi, 1460 struct sk_buff *skb); 1461 extern void napi_reuse_skb(struct napi_struct *napi, 1462 struct sk_buff *skb); 1463 extern struct sk_buff * napi_get_frags(struct napi_struct *napi); 1464 extern int napi_frags_finish(struct napi_struct *napi, 1465 struct sk_buff *skb, int ret); 1466 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); 1467 extern int napi_gro_frags(struct napi_struct *napi); 1468 1469 static inline void napi_free_frags(struct napi_struct *napi) 1470 { 1471 kfree_skb(napi->skb); 1472 napi->skb = NULL; 1473 } 1474 1475 extern void netif_nit_deliver(struct sk_buff *skb); 1476 extern int dev_valid_name(const char *name); 1477 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1478 extern int dev_ethtool(struct net *net, struct ifreq *); 1479 extern unsigned dev_get_flags(const struct net_device *); 1480 extern int dev_change_flags(struct net_device *, unsigned); 1481 extern int dev_change_name(struct net_device *, const char *); 1482 extern int dev_set_alias(struct net_device *, const char *, size_t); 1483 extern int dev_change_net_namespace(struct net_device *, 1484 struct net *, const char *); 1485 extern int dev_set_mtu(struct net_device *, int); 1486 extern int dev_set_mac_address(struct net_device *, 1487 struct sockaddr *); 1488 extern int dev_hard_start_xmit(struct sk_buff *skb, 1489 struct net_device *dev, 1490 struct netdev_queue *txq); 1491 1492 extern int netdev_budget; 1493 1494 /* Called by rtnetlink.c:rtnl_unlock() */ 1495 extern void netdev_run_todo(void); 1496 1497 /** 1498 * dev_put - release reference to device 1499 * @dev: network device 1500 * 1501 * Release reference to device to allow it to be freed. 1502 */ 1503 static inline void dev_put(struct net_device *dev) 1504 { 1505 atomic_dec(&dev->refcnt); 1506 } 1507 1508 /** 1509 * dev_hold - get reference to device 1510 * @dev: network device 1511 * 1512 * Hold reference to device to keep it from being freed. 1513 */ 1514 static inline void dev_hold(struct net_device *dev) 1515 { 1516 atomic_inc(&dev->refcnt); 1517 } 1518 1519 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1520 * and _off may be called from IRQ context, but it is caller 1521 * who is responsible for serialization of these calls. 1522 * 1523 * The name carrier is inappropriate, these functions should really be 1524 * called netif_lowerlayer_*() because they represent the state of any 1525 * kind of lower layer not just hardware media. 1526 */ 1527 1528 extern void linkwatch_fire_event(struct net_device *dev); 1529 1530 /** 1531 * netif_carrier_ok - test if carrier present 1532 * @dev: network device 1533 * 1534 * Check if carrier is present on device 1535 */ 1536 static inline int netif_carrier_ok(const struct net_device *dev) 1537 { 1538 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1539 } 1540 1541 extern unsigned long dev_trans_start(struct net_device *dev); 1542 1543 extern void __netdev_watchdog_up(struct net_device *dev); 1544 1545 extern void netif_carrier_on(struct net_device *dev); 1546 1547 extern void netif_carrier_off(struct net_device *dev); 1548 1549 /** 1550 * netif_dormant_on - mark device as dormant. 1551 * @dev: network device 1552 * 1553 * Mark device as dormant (as per RFC2863). 1554 * 1555 * The dormant state indicates that the relevant interface is not 1556 * actually in a condition to pass packets (i.e., it is not 'up') but is 1557 * in a "pending" state, waiting for some external event. For "on- 1558 * demand" interfaces, this new state identifies the situation where the 1559 * interface is waiting for events to place it in the up state. 1560 * 1561 */ 1562 static inline void netif_dormant_on(struct net_device *dev) 1563 { 1564 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1565 linkwatch_fire_event(dev); 1566 } 1567 1568 /** 1569 * netif_dormant_off - set device as not dormant. 1570 * @dev: network device 1571 * 1572 * Device is not in dormant state. 1573 */ 1574 static inline void netif_dormant_off(struct net_device *dev) 1575 { 1576 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1577 linkwatch_fire_event(dev); 1578 } 1579 1580 /** 1581 * netif_dormant - test if carrier present 1582 * @dev: network device 1583 * 1584 * Check if carrier is present on device 1585 */ 1586 static inline int netif_dormant(const struct net_device *dev) 1587 { 1588 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1589 } 1590 1591 1592 /** 1593 * netif_oper_up - test if device is operational 1594 * @dev: network device 1595 * 1596 * Check if carrier is operational 1597 */ 1598 static inline int netif_oper_up(const struct net_device *dev) { 1599 return (dev->operstate == IF_OPER_UP || 1600 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1601 } 1602 1603 /** 1604 * netif_device_present - is device available or removed 1605 * @dev: network device 1606 * 1607 * Check if device has not been removed from system. 1608 */ 1609 static inline int netif_device_present(struct net_device *dev) 1610 { 1611 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1612 } 1613 1614 extern void netif_device_detach(struct net_device *dev); 1615 1616 extern void netif_device_attach(struct net_device *dev); 1617 1618 /* 1619 * Network interface message level settings 1620 */ 1621 #define HAVE_NETIF_MSG 1 1622 1623 enum { 1624 NETIF_MSG_DRV = 0x0001, 1625 NETIF_MSG_PROBE = 0x0002, 1626 NETIF_MSG_LINK = 0x0004, 1627 NETIF_MSG_TIMER = 0x0008, 1628 NETIF_MSG_IFDOWN = 0x0010, 1629 NETIF_MSG_IFUP = 0x0020, 1630 NETIF_MSG_RX_ERR = 0x0040, 1631 NETIF_MSG_TX_ERR = 0x0080, 1632 NETIF_MSG_TX_QUEUED = 0x0100, 1633 NETIF_MSG_INTR = 0x0200, 1634 NETIF_MSG_TX_DONE = 0x0400, 1635 NETIF_MSG_RX_STATUS = 0x0800, 1636 NETIF_MSG_PKTDATA = 0x1000, 1637 NETIF_MSG_HW = 0x2000, 1638 NETIF_MSG_WOL = 0x4000, 1639 }; 1640 1641 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1642 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1643 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1644 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1645 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1646 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1647 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1648 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1649 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1650 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1651 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1652 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1653 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1654 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1655 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1656 1657 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1658 { 1659 /* use default */ 1660 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1661 return default_msg_enable_bits; 1662 if (debug_value == 0) /* no output */ 1663 return 0; 1664 /* set low N bits */ 1665 return (1 << debug_value) - 1; 1666 } 1667 1668 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) 1669 { 1670 spin_lock(&txq->_xmit_lock); 1671 txq->xmit_lock_owner = cpu; 1672 } 1673 1674 static inline void __netif_tx_lock_bh(struct netdev_queue *txq) 1675 { 1676 spin_lock_bh(&txq->_xmit_lock); 1677 txq->xmit_lock_owner = smp_processor_id(); 1678 } 1679 1680 static inline int __netif_tx_trylock(struct netdev_queue *txq) 1681 { 1682 int ok = spin_trylock(&txq->_xmit_lock); 1683 if (likely(ok)) 1684 txq->xmit_lock_owner = smp_processor_id(); 1685 return ok; 1686 } 1687 1688 static inline void __netif_tx_unlock(struct netdev_queue *txq) 1689 { 1690 txq->xmit_lock_owner = -1; 1691 spin_unlock(&txq->_xmit_lock); 1692 } 1693 1694 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) 1695 { 1696 txq->xmit_lock_owner = -1; 1697 spin_unlock_bh(&txq->_xmit_lock); 1698 } 1699 1700 static inline void txq_trans_update(struct netdev_queue *txq) 1701 { 1702 if (txq->xmit_lock_owner != -1) 1703 txq->trans_start = jiffies; 1704 } 1705 1706 /** 1707 * netif_tx_lock - grab network device transmit lock 1708 * @dev: network device 1709 * 1710 * Get network device transmit lock 1711 */ 1712 static inline void netif_tx_lock(struct net_device *dev) 1713 { 1714 unsigned int i; 1715 int cpu; 1716 1717 spin_lock(&dev->tx_global_lock); 1718 cpu = smp_processor_id(); 1719 for (i = 0; i < dev->num_tx_queues; i++) { 1720 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1721 1722 /* We are the only thread of execution doing a 1723 * freeze, but we have to grab the _xmit_lock in 1724 * order to synchronize with threads which are in 1725 * the ->hard_start_xmit() handler and already 1726 * checked the frozen bit. 1727 */ 1728 __netif_tx_lock(txq, cpu); 1729 set_bit(__QUEUE_STATE_FROZEN, &txq->state); 1730 __netif_tx_unlock(txq); 1731 } 1732 } 1733 1734 static inline void netif_tx_lock_bh(struct net_device *dev) 1735 { 1736 local_bh_disable(); 1737 netif_tx_lock(dev); 1738 } 1739 1740 static inline void netif_tx_unlock(struct net_device *dev) 1741 { 1742 unsigned int i; 1743 1744 for (i = 0; i < dev->num_tx_queues; i++) { 1745 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1746 1747 /* No need to grab the _xmit_lock here. If the 1748 * queue is not stopped for another reason, we 1749 * force a schedule. 1750 */ 1751 clear_bit(__QUEUE_STATE_FROZEN, &txq->state); 1752 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1753 __netif_schedule(txq->qdisc); 1754 } 1755 spin_unlock(&dev->tx_global_lock); 1756 } 1757 1758 static inline void netif_tx_unlock_bh(struct net_device *dev) 1759 { 1760 netif_tx_unlock(dev); 1761 local_bh_enable(); 1762 } 1763 1764 #define HARD_TX_LOCK(dev, txq, cpu) { \ 1765 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1766 __netif_tx_lock(txq, cpu); \ 1767 } \ 1768 } 1769 1770 #define HARD_TX_UNLOCK(dev, txq) { \ 1771 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1772 __netif_tx_unlock(txq); \ 1773 } \ 1774 } 1775 1776 static inline void netif_tx_disable(struct net_device *dev) 1777 { 1778 unsigned int i; 1779 int cpu; 1780 1781 local_bh_disable(); 1782 cpu = smp_processor_id(); 1783 for (i = 0; i < dev->num_tx_queues; i++) { 1784 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1785 1786 __netif_tx_lock(txq, cpu); 1787 netif_tx_stop_queue(txq); 1788 __netif_tx_unlock(txq); 1789 } 1790 local_bh_enable(); 1791 } 1792 1793 static inline void netif_addr_lock(struct net_device *dev) 1794 { 1795 spin_lock(&dev->addr_list_lock); 1796 } 1797 1798 static inline void netif_addr_lock_bh(struct net_device *dev) 1799 { 1800 spin_lock_bh(&dev->addr_list_lock); 1801 } 1802 1803 static inline void netif_addr_unlock(struct net_device *dev) 1804 { 1805 spin_unlock(&dev->addr_list_lock); 1806 } 1807 1808 static inline void netif_addr_unlock_bh(struct net_device *dev) 1809 { 1810 spin_unlock_bh(&dev->addr_list_lock); 1811 } 1812 1813 /* 1814 * dev_addrs walker. Should be used only for read access. Call with 1815 * rcu_read_lock held. 1816 */ 1817 #define for_each_dev_addr(dev, ha) \ 1818 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) 1819 1820 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1821 1822 extern void ether_setup(struct net_device *dev); 1823 1824 /* Support for loadable net-drivers */ 1825 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1826 void (*setup)(struct net_device *), 1827 unsigned int queue_count); 1828 #define alloc_netdev(sizeof_priv, name, setup) \ 1829 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1830 extern int register_netdev(struct net_device *dev); 1831 extern void unregister_netdev(struct net_device *dev); 1832 1833 /* Functions used for device addresses handling */ 1834 extern int dev_addr_add(struct net_device *dev, unsigned char *addr, 1835 unsigned char addr_type); 1836 extern int dev_addr_del(struct net_device *dev, unsigned char *addr, 1837 unsigned char addr_type); 1838 extern int dev_addr_add_multiple(struct net_device *to_dev, 1839 struct net_device *from_dev, 1840 unsigned char addr_type); 1841 extern int dev_addr_del_multiple(struct net_device *to_dev, 1842 struct net_device *from_dev, 1843 unsigned char addr_type); 1844 1845 /* Functions used for secondary unicast and multicast support */ 1846 extern void dev_set_rx_mode(struct net_device *dev); 1847 extern void __dev_set_rx_mode(struct net_device *dev); 1848 extern int dev_unicast_delete(struct net_device *dev, void *addr); 1849 extern int dev_unicast_add(struct net_device *dev, void *addr); 1850 extern int dev_unicast_sync(struct net_device *to, struct net_device *from); 1851 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); 1852 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1853 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1854 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1855 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1856 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1857 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1858 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1859 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1860 extern int dev_set_promiscuity(struct net_device *dev, int inc); 1861 extern int dev_set_allmulti(struct net_device *dev, int inc); 1862 extern void netdev_state_change(struct net_device *dev); 1863 extern void netdev_bonding_change(struct net_device *dev); 1864 extern void netdev_features_change(struct net_device *dev); 1865 /* Load a device via the kmod */ 1866 extern void dev_load(struct net *net, const char *name); 1867 extern void dev_mcast_init(void); 1868 extern const struct net_device_stats *dev_get_stats(struct net_device *dev); 1869 1870 extern int netdev_max_backlog; 1871 extern int weight_p; 1872 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1873 extern int skb_checksum_help(struct sk_buff *skb); 1874 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1875 #ifdef CONFIG_BUG 1876 extern void netdev_rx_csum_fault(struct net_device *dev); 1877 #else 1878 static inline void netdev_rx_csum_fault(struct net_device *dev) 1879 { 1880 } 1881 #endif 1882 /* rx skb timestamps */ 1883 extern void net_enable_timestamp(void); 1884 extern void net_disable_timestamp(void); 1885 1886 #ifdef CONFIG_PROC_FS 1887 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1888 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1889 extern void dev_seq_stop(struct seq_file *seq, void *v); 1890 #endif 1891 1892 extern int netdev_class_create_file(struct class_attribute *class_attr); 1893 extern void netdev_class_remove_file(struct class_attribute *class_attr); 1894 1895 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); 1896 1897 extern void linkwatch_run_queue(void); 1898 1899 unsigned long netdev_increment_features(unsigned long all, unsigned long one, 1900 unsigned long mask); 1901 unsigned long netdev_fix_features(unsigned long features, const char *name); 1902 1903 static inline int net_gso_ok(int features, int gso_type) 1904 { 1905 int feature = gso_type << NETIF_F_GSO_SHIFT; 1906 return (features & feature) == feature; 1907 } 1908 1909 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1910 { 1911 return net_gso_ok(features, skb_shinfo(skb)->gso_type) && 1912 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); 1913 } 1914 1915 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1916 { 1917 return skb_is_gso(skb) && 1918 (!skb_gso_ok(skb, dev->features) || 1919 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1920 } 1921 1922 static inline void netif_set_gso_max_size(struct net_device *dev, 1923 unsigned int size) 1924 { 1925 dev->gso_max_size = size; 1926 } 1927 1928 static inline void skb_bond_set_mac_by_master(struct sk_buff *skb, 1929 struct net_device *master) 1930 { 1931 if (skb->pkt_type == PACKET_HOST) { 1932 u16 *dest = (u16 *) eth_hdr(skb)->h_dest; 1933 1934 memcpy(dest, master->dev_addr, ETH_ALEN); 1935 } 1936 } 1937 1938 /* On bonding slaves other than the currently active slave, suppress 1939 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1940 * ARP on active-backup slaves with arp_validate enabled. 1941 */ 1942 static inline int skb_bond_should_drop(struct sk_buff *skb) 1943 { 1944 struct net_device *dev = skb->dev; 1945 struct net_device *master = dev->master; 1946 1947 if (master) { 1948 if (master->priv_flags & IFF_MASTER_ARPMON) 1949 dev->last_rx = jiffies; 1950 1951 if ((master->priv_flags & IFF_MASTER_ALB) && master->br_port) { 1952 /* Do address unmangle. The local destination address 1953 * will be always the one master has. Provides the right 1954 * functionality in a bridge. 1955 */ 1956 skb_bond_set_mac_by_master(skb, master); 1957 } 1958 1959 if (dev->priv_flags & IFF_SLAVE_INACTIVE) { 1960 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1961 skb->protocol == __cpu_to_be16(ETH_P_ARP)) 1962 return 0; 1963 1964 if (master->priv_flags & IFF_MASTER_ALB) { 1965 if (skb->pkt_type != PACKET_BROADCAST && 1966 skb->pkt_type != PACKET_MULTICAST) 1967 return 0; 1968 } 1969 if (master->priv_flags & IFF_MASTER_8023AD && 1970 skb->protocol == __cpu_to_be16(ETH_P_SLOW)) 1971 return 0; 1972 1973 return 1; 1974 } 1975 } 1976 return 0; 1977 } 1978 1979 extern struct pernet_operations __net_initdata loopback_net_ops; 1980 1981 static inline int dev_ethtool_get_settings(struct net_device *dev, 1982 struct ethtool_cmd *cmd) 1983 { 1984 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) 1985 return -EOPNOTSUPP; 1986 return dev->ethtool_ops->get_settings(dev, cmd); 1987 } 1988 1989 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) 1990 { 1991 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) 1992 return 0; 1993 return dev->ethtool_ops->get_rx_csum(dev); 1994 } 1995 1996 static inline u32 dev_ethtool_get_flags(struct net_device *dev) 1997 { 1998 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) 1999 return 0; 2000 return dev->ethtool_ops->get_flags(dev); 2001 } 2002 #endif /* __KERNEL__ */ 2003 2004 #endif /* _LINUX_NETDEVICE_H */ 2005