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, <waltje@uWalt.NL.Mugnet.ORG> 12 * Corey Minyard <wf-rch!minyard@relay.EU.net> 13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> 14 * Alan Cox, <alan@lxorguk.ukuu.org.uk> 15 * Bjorn Ekwall. <bj0rn@blox.se> 16 * Pekka Riikonen <priikone@poseidon.pspt.fi> 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/dmaengine.h> 43 #include <linux/workqueue.h> 44 45 #include <net/net_namespace.h> 46 #include <net/dsa.h> 47 #ifdef CONFIG_DCB 48 #include <net/dcbnl.h> 49 #endif 50 51 struct vlan_group; 52 struct ethtool_ops; 53 struct netpoll_info; 54 /* 802.11 specific */ 55 struct wireless_dev; 56 /* source back-compat hooks */ 57 #define SET_ETHTOOL_OPS(netdev,ops) \ 58 ( (netdev)->ethtool_ops = (ops) ) 59 60 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev 61 functions are available. */ 62 #define HAVE_FREE_NETDEV /* free_netdev() */ 63 #define HAVE_NETDEV_PRIV /* netdev_priv() */ 64 65 #define NET_XMIT_SUCCESS 0 66 #define NET_XMIT_DROP 1 /* skb dropped */ 67 #define NET_XMIT_CN 2 /* congestion notification */ 68 #define NET_XMIT_POLICED 3 /* skb is shot by police */ 69 #define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */ 70 71 /* Backlog congestion levels */ 72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ 73 #define NET_RX_DROP 1 /* packet dropped */ 74 #define NET_RX_CN_LOW 2 /* storm alert, just in case */ 75 #define NET_RX_CN_MOD 3 /* Storm on its way! */ 76 #define NET_RX_CN_HIGH 4 /* The storm is here */ 77 #define NET_RX_BAD 5 /* packet dropped due to kernel error */ 78 79 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It 80 * indicates that the device will soon be dropping packets, or already drops 81 * some packets of the same priority; prompting us to send less aggressively. */ 82 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) 83 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) 84 85 #endif 86 87 #define MAX_ADDR_LEN 32 /* Largest hardware address length */ 88 89 /* Driver transmit return codes */ 90 #define NETDEV_TX_OK 0 /* driver took care of packet */ 91 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ 92 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ 93 94 #ifdef __KERNEL__ 95 96 /* 97 * Compute the worst case header length according to the protocols 98 * used. 99 */ 100 101 #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 102 # if defined(CONFIG_MAC80211_MESH) 103 # define LL_MAX_HEADER 128 104 # else 105 # define LL_MAX_HEADER 96 106 # endif 107 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) 108 # define LL_MAX_HEADER 48 109 #else 110 # define LL_MAX_HEADER 32 111 #endif 112 113 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ 114 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ 115 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ 116 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) 117 #define MAX_HEADER LL_MAX_HEADER 118 #else 119 #define MAX_HEADER (LL_MAX_HEADER + 48) 120 #endif 121 122 #endif /* __KERNEL__ */ 123 124 /* 125 * Network device statistics. Akin to the 2.0 ether stats but 126 * with byte counters. 127 */ 128 129 struct net_device_stats 130 { 131 unsigned long rx_packets; /* total packets received */ 132 unsigned long tx_packets; /* total packets transmitted */ 133 unsigned long rx_bytes; /* total bytes received */ 134 unsigned long tx_bytes; /* total bytes transmitted */ 135 unsigned long rx_errors; /* bad packets received */ 136 unsigned long tx_errors; /* packet transmit problems */ 137 unsigned long rx_dropped; /* no space in linux buffers */ 138 unsigned long tx_dropped; /* no space available in linux */ 139 unsigned long multicast; /* multicast packets received */ 140 unsigned long collisions; 141 142 /* detailed rx_errors: */ 143 unsigned long rx_length_errors; 144 unsigned long rx_over_errors; /* receiver ring buff overflow */ 145 unsigned long rx_crc_errors; /* recved pkt with crc error */ 146 unsigned long rx_frame_errors; /* recv'd frame alignment error */ 147 unsigned long rx_fifo_errors; /* recv'r fifo overrun */ 148 unsigned long rx_missed_errors; /* receiver missed packet */ 149 150 /* detailed tx_errors */ 151 unsigned long tx_aborted_errors; 152 unsigned long tx_carrier_errors; 153 unsigned long tx_fifo_errors; 154 unsigned long tx_heartbeat_errors; 155 unsigned long tx_window_errors; 156 157 /* for cslip etc */ 158 unsigned long rx_compressed; 159 unsigned long tx_compressed; 160 }; 161 162 163 /* Media selection options. */ 164 enum { 165 IF_PORT_UNKNOWN = 0, 166 IF_PORT_10BASE2, 167 IF_PORT_10BASET, 168 IF_PORT_AUI, 169 IF_PORT_100BASET, 170 IF_PORT_100BASETX, 171 IF_PORT_100BASEFX 172 }; 173 174 #ifdef __KERNEL__ 175 176 #include <linux/cache.h> 177 #include <linux/skbuff.h> 178 179 struct neighbour; 180 struct neigh_parms; 181 struct sk_buff; 182 183 struct netif_rx_stats 184 { 185 unsigned total; 186 unsigned dropped; 187 unsigned time_squeeze; 188 unsigned cpu_collision; 189 }; 190 191 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); 192 193 struct dev_addr_list 194 { 195 struct dev_addr_list *next; 196 u8 da_addr[MAX_ADDR_LEN]; 197 u8 da_addrlen; 198 u8 da_synced; 199 int da_users; 200 int da_gusers; 201 }; 202 203 /* 204 * We tag multicasts with these structures. 205 */ 206 207 #define dev_mc_list dev_addr_list 208 #define dmi_addr da_addr 209 #define dmi_addrlen da_addrlen 210 #define dmi_users da_users 211 #define dmi_gusers da_gusers 212 213 struct hh_cache 214 { 215 struct hh_cache *hh_next; /* Next entry */ 216 atomic_t hh_refcnt; /* number of users */ 217 /* 218 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate 219 * cache line on SMP. 220 * They are mostly read, but hh_refcnt may be changed quite frequently, 221 * incurring cache line ping pongs. 222 */ 223 __be16 hh_type ____cacheline_aligned_in_smp; 224 /* protocol identifier, f.e ETH_P_IP 225 * NOTE: For VLANs, this will be the 226 * encapuslated type. --BLG 227 */ 228 u16 hh_len; /* length of header */ 229 int (*hh_output)(struct sk_buff *skb); 230 seqlock_t hh_lock; 231 232 /* cached hardware header; allow for machine alignment needs. */ 233 #define HH_DATA_MOD 16 234 #define HH_DATA_OFF(__len) \ 235 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) 236 #define HH_DATA_ALIGN(__len) \ 237 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) 238 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; 239 }; 240 241 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. 242 * Alternative is: 243 * dev->hard_header_len ? (dev->hard_header_len + 244 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 245 * 246 * We could use other alignment values, but we must maintain the 247 * relationship HH alignment <= LL alignment. 248 * 249 * LL_ALLOCATED_SPACE also takes into account the tailroom the device 250 * may need. 251 */ 252 #define LL_RESERVED_SPACE(dev) \ 253 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 254 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ 255 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 256 #define LL_ALLOCATED_SPACE(dev) \ 257 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 258 259 struct header_ops { 260 int (*create) (struct sk_buff *skb, struct net_device *dev, 261 unsigned short type, const void *daddr, 262 const void *saddr, unsigned len); 263 int (*parse)(const struct sk_buff *skb, unsigned char *haddr); 264 int (*rebuild)(struct sk_buff *skb); 265 #define HAVE_HEADER_CACHE 266 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); 267 void (*cache_update)(struct hh_cache *hh, 268 const struct net_device *dev, 269 const unsigned char *haddr); 270 }; 271 272 /* These flag bits are private to the generic network queueing 273 * layer, they may not be explicitly referenced by any other 274 * code. 275 */ 276 277 enum netdev_state_t 278 { 279 __LINK_STATE_START, 280 __LINK_STATE_PRESENT, 281 __LINK_STATE_NOCARRIER, 282 __LINK_STATE_LINKWATCH_PENDING, 283 __LINK_STATE_DORMANT, 284 }; 285 286 287 /* 288 * This structure holds at boot time configured netdevice settings. They 289 * are then used in the device probing. 290 */ 291 struct netdev_boot_setup { 292 char name[IFNAMSIZ]; 293 struct ifmap map; 294 }; 295 #define NETDEV_BOOT_SETUP_MAX 8 296 297 extern int __init netdev_boot_setup(char *str); 298 299 /* 300 * Structure for NAPI scheduling similar to tasklet but with weighting 301 */ 302 struct napi_struct { 303 /* The poll_list must only be managed by the entity which 304 * changes the state of the NAPI_STATE_SCHED bit. This means 305 * whoever atomically sets that bit can add this napi_struct 306 * to the per-cpu poll_list, and whoever clears that bit 307 * can remove from the list right before clearing the bit. 308 */ 309 struct list_head poll_list; 310 311 unsigned long state; 312 int weight; 313 int (*poll)(struct napi_struct *, int); 314 #ifdef CONFIG_NETPOLL 315 spinlock_t poll_lock; 316 int poll_owner; 317 #endif 318 319 unsigned int gro_count; 320 321 struct net_device *dev; 322 struct list_head dev_list; 323 struct sk_buff *gro_list; 324 struct sk_buff *skb; 325 }; 326 327 enum 328 { 329 NAPI_STATE_SCHED, /* Poll is scheduled */ 330 NAPI_STATE_DISABLE, /* Disable pending */ 331 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ 332 }; 333 334 enum { 335 GRO_MERGED, 336 GRO_MERGED_FREE, 337 GRO_HELD, 338 GRO_NORMAL, 339 GRO_DROP, 340 }; 341 342 extern void __napi_schedule(struct napi_struct *n); 343 344 static inline int napi_disable_pending(struct napi_struct *n) 345 { 346 return test_bit(NAPI_STATE_DISABLE, &n->state); 347 } 348 349 /** 350 * napi_schedule_prep - check if napi can be scheduled 351 * @n: napi context 352 * 353 * Test if NAPI routine is already running, and if not mark 354 * it as running. This is used as a condition variable 355 * insure only one NAPI poll instance runs. We also make 356 * sure there is no pending NAPI disable. 357 */ 358 static inline int napi_schedule_prep(struct napi_struct *n) 359 { 360 return !napi_disable_pending(n) && 361 !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 362 } 363 364 /** 365 * napi_schedule - schedule NAPI poll 366 * @n: napi context 367 * 368 * Schedule NAPI poll routine to be called if it is not already 369 * running. 370 */ 371 static inline void napi_schedule(struct napi_struct *n) 372 { 373 if (napi_schedule_prep(n)) 374 __napi_schedule(n); 375 } 376 377 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 378 static inline int napi_reschedule(struct napi_struct *napi) 379 { 380 if (napi_schedule_prep(napi)) { 381 __napi_schedule(napi); 382 return 1; 383 } 384 return 0; 385 } 386 387 /** 388 * napi_complete - NAPI processing complete 389 * @n: napi context 390 * 391 * Mark NAPI processing as complete. 392 */ 393 extern void __napi_complete(struct napi_struct *n); 394 extern void napi_complete(struct napi_struct *n); 395 396 /** 397 * napi_disable - prevent NAPI from scheduling 398 * @n: napi context 399 * 400 * Stop NAPI from being scheduled on this context. 401 * Waits till any outstanding processing completes. 402 */ 403 static inline void napi_disable(struct napi_struct *n) 404 { 405 set_bit(NAPI_STATE_DISABLE, &n->state); 406 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 407 msleep(1); 408 clear_bit(NAPI_STATE_DISABLE, &n->state); 409 } 410 411 /** 412 * napi_enable - enable NAPI scheduling 413 * @n: napi context 414 * 415 * Resume NAPI from being scheduled on this context. 416 * Must be paired with napi_disable. 417 */ 418 static inline void napi_enable(struct napi_struct *n) 419 { 420 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 421 smp_mb__before_clear_bit(); 422 clear_bit(NAPI_STATE_SCHED, &n->state); 423 } 424 425 #ifdef CONFIG_SMP 426 /** 427 * napi_synchronize - wait until NAPI is not running 428 * @n: napi context 429 * 430 * Wait until NAPI is done being scheduled on this context. 431 * Waits till any outstanding processing completes but 432 * does not disable future activations. 433 */ 434 static inline void napi_synchronize(const struct napi_struct *n) 435 { 436 while (test_bit(NAPI_STATE_SCHED, &n->state)) 437 msleep(1); 438 } 439 #else 440 # define napi_synchronize(n) barrier() 441 #endif 442 443 enum netdev_queue_state_t 444 { 445 __QUEUE_STATE_XOFF, 446 __QUEUE_STATE_FROZEN, 447 }; 448 449 struct netdev_queue { 450 struct net_device *dev; 451 struct Qdisc *qdisc; 452 unsigned long state; 453 spinlock_t _xmit_lock; 454 int xmit_lock_owner; 455 struct Qdisc *qdisc_sleeping; 456 } ____cacheline_aligned_in_smp; 457 458 459 /* 460 * This structure defines the management hooks for network devices. 461 * The following hooks can be defined; unless noted otherwise, they are 462 * optional and can be filled with a null pointer. 463 * 464 * int (*ndo_init)(struct net_device *dev); 465 * This function is called once when network device is registered. 466 * The network device can use this to any late stage initializaton 467 * or semantic validattion. It can fail with an error code which will 468 * be propogated back to register_netdev 469 * 470 * void (*ndo_uninit)(struct net_device *dev); 471 * This function is called when device is unregistered or when registration 472 * fails. It is not called if init fails. 473 * 474 * int (*ndo_open)(struct net_device *dev); 475 * This function is called when network device transistions to the up 476 * state. 477 * 478 * int (*ndo_stop)(struct net_device *dev); 479 * This function is called when network device transistions to the down 480 * state. 481 * 482 * int (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev); 483 * Called when a packet needs to be transmitted. 484 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY, or NETDEV_TX_LOCKED, 485 * Required can not be NULL. 486 * 487 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); 488 * Called to decide which queue to when device supports multiple 489 * transmit queues. 490 * 491 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); 492 * This function is called to allow device receiver to make 493 * changes to configuration when multicast or promiscious is enabled. 494 * 495 * void (*ndo_set_rx_mode)(struct net_device *dev); 496 * This function is called device changes address list filtering. 497 * 498 * void (*ndo_set_multicast_list)(struct net_device *dev); 499 * This function is called when the multicast address list changes. 500 * 501 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); 502 * This function is called when the Media Access Control address 503 * needs to be changed. If this interface is not defined, the 504 * mac address can not be changed. 505 * 506 * int (*ndo_validate_addr)(struct net_device *dev); 507 * Test if Media Access Control address is valid for the device. 508 * 509 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); 510 * Called when a user request an ioctl which can't be handled by 511 * the generic interface code. If not defined ioctl's return 512 * not supported error code. 513 * 514 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); 515 * Used to set network devices bus interface parameters. This interface 516 * is retained for legacy reason, new devices should use the bus 517 * interface (PCI) for low level management. 518 * 519 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); 520 * Called when a user wants to change the Maximum Transfer Unit 521 * of a device. If not defined, any request to change MTU will 522 * will return an error. 523 * 524 * void (*ndo_tx_timeout)(struct net_device *dev); 525 * Callback uses when the transmitter has not made any progress 526 * for dev->watchdog ticks. 527 * 528 * struct net_device_stats* (*get_stats)(struct net_device *dev); 529 * Called when a user wants to get the network device usage 530 * statistics. If not defined, the counters in dev->stats will 531 * be used. 532 * 533 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); 534 * If device support VLAN receive accleration 535 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called 536 * when vlan groups for the device changes. Note: grp is NULL 537 * if no vlan's groups are being used. 538 * 539 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); 540 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 541 * this function is called when a VLAN id is registered. 542 * 543 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); 544 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 545 * this function is called when a VLAN id is unregistered. 546 * 547 * void (*ndo_poll_controller)(struct net_device *dev); 548 */ 549 #define HAVE_NET_DEVICE_OPS 550 struct net_device_ops { 551 int (*ndo_init)(struct net_device *dev); 552 void (*ndo_uninit)(struct net_device *dev); 553 int (*ndo_open)(struct net_device *dev); 554 int (*ndo_stop)(struct net_device *dev); 555 int (*ndo_start_xmit) (struct sk_buff *skb, 556 struct net_device *dev); 557 u16 (*ndo_select_queue)(struct net_device *dev, 558 struct sk_buff *skb); 559 #define HAVE_CHANGE_RX_FLAGS 560 void (*ndo_change_rx_flags)(struct net_device *dev, 561 int flags); 562 #define HAVE_SET_RX_MODE 563 void (*ndo_set_rx_mode)(struct net_device *dev); 564 #define HAVE_MULTICAST 565 void (*ndo_set_multicast_list)(struct net_device *dev); 566 #define HAVE_SET_MAC_ADDR 567 int (*ndo_set_mac_address)(struct net_device *dev, 568 void *addr); 569 #define HAVE_VALIDATE_ADDR 570 int (*ndo_validate_addr)(struct net_device *dev); 571 #define HAVE_PRIVATE_IOCTL 572 int (*ndo_do_ioctl)(struct net_device *dev, 573 struct ifreq *ifr, int cmd); 574 #define HAVE_SET_CONFIG 575 int (*ndo_set_config)(struct net_device *dev, 576 struct ifmap *map); 577 #define HAVE_CHANGE_MTU 578 int (*ndo_change_mtu)(struct net_device *dev, 579 int new_mtu); 580 int (*ndo_neigh_setup)(struct net_device *dev, 581 struct neigh_parms *); 582 #define HAVE_TX_TIMEOUT 583 void (*ndo_tx_timeout) (struct net_device *dev); 584 585 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); 586 587 void (*ndo_vlan_rx_register)(struct net_device *dev, 588 struct vlan_group *grp); 589 void (*ndo_vlan_rx_add_vid)(struct net_device *dev, 590 unsigned short vid); 591 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, 592 unsigned short vid); 593 #ifdef CONFIG_NET_POLL_CONTROLLER 594 #define HAVE_NETDEV_POLL 595 void (*ndo_poll_controller)(struct net_device *dev); 596 #endif 597 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 598 int (*ndo_fcoe_ddp_setup)(struct net_device *dev, 599 u16 xid, 600 struct scatterlist *sgl, 601 unsigned int sgc); 602 int (*ndo_fcoe_ddp_done)(struct net_device *dev, 603 u16 xid); 604 #endif 605 }; 606 607 /* 608 * The DEVICE structure. 609 * Actually, this whole structure is a big mistake. It mixes I/O 610 * data with strictly "high-level" data, and it has to know about 611 * almost every data structure used in the INET module. 612 * 613 * FIXME: cleanup struct net_device such that network protocol info 614 * moves out. 615 */ 616 617 struct net_device 618 { 619 620 /* 621 * This is the first field of the "visible" part of this structure 622 * (i.e. as seen by users in the "Space.c" file). It is the name 623 * the interface. 624 */ 625 char name[IFNAMSIZ]; 626 /* device name hash chain */ 627 struct hlist_node name_hlist; 628 /* snmp alias */ 629 char *ifalias; 630 631 /* 632 * I/O specific fields 633 * FIXME: Merge these and struct ifmap into one 634 */ 635 unsigned long mem_end; /* shared mem end */ 636 unsigned long mem_start; /* shared mem start */ 637 unsigned long base_addr; /* device I/O address */ 638 unsigned int irq; /* device IRQ number */ 639 640 /* 641 * Some hardware also needs these fields, but they are not 642 * part of the usual set specified in Space.c. 643 */ 644 645 unsigned char if_port; /* Selectable AUI, TP,..*/ 646 unsigned char dma; /* DMA channel */ 647 648 unsigned long state; 649 650 struct list_head dev_list; 651 struct list_head napi_list; 652 653 /* Net device features */ 654 unsigned long features; 655 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 656 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 657 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 658 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 659 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 660 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 661 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 662 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 663 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 664 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 665 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 666 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 667 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 668 /* do not use LLTX in new drivers */ 669 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 670 #define NETIF_F_GRO 16384 /* Generic receive offload */ 671 #define NETIF_F_LRO 32768 /* large receive offload */ 672 673 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ 674 675 /* Segmentation offload features */ 676 #define NETIF_F_GSO_SHIFT 16 677 #define NETIF_F_GSO_MASK 0x00ff0000 678 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 679 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 680 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 681 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 682 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 683 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) 684 685 /* List of features with software fallbacks. */ 686 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 687 688 689 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 690 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 691 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 692 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 693 694 /* 695 * If one device supports one of these features, then enable them 696 * for all in netdev_increment_features. 697 */ 698 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ 699 NETIF_F_SG | NETIF_F_HIGHDMA | \ 700 NETIF_F_FRAGLIST) 701 702 /* Interface index. Unique device identifier */ 703 int ifindex; 704 int iflink; 705 706 struct net_device_stats stats; 707 708 #ifdef CONFIG_WIRELESS_EXT 709 /* List of functions to handle Wireless Extensions (instead of ioctl). 710 * See <net/iw_handler.h> for details. Jean II */ 711 const struct iw_handler_def * wireless_handlers; 712 /* Instance data managed by the core of Wireless Extensions. */ 713 struct iw_public_data * wireless_data; 714 #endif 715 /* Management operations */ 716 const struct net_device_ops *netdev_ops; 717 const struct ethtool_ops *ethtool_ops; 718 719 /* Hardware header description */ 720 const struct header_ops *header_ops; 721 722 unsigned int flags; /* interface flags (a la BSD) */ 723 unsigned short gflags; 724 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 725 unsigned short padded; /* How much padding added by alloc_netdev() */ 726 727 unsigned char operstate; /* RFC2863 operstate */ 728 unsigned char link_mode; /* mapping policy to operstate */ 729 730 unsigned mtu; /* interface MTU value */ 731 unsigned short type; /* interface hardware type */ 732 unsigned short hard_header_len; /* hardware hdr length */ 733 734 /* extra head- and tailroom the hardware may need, but not in all cases 735 * can this be guaranteed, especially tailroom. Some cases also use 736 * LL_MAX_HEADER instead to allocate the skb. 737 */ 738 unsigned short needed_headroom; 739 unsigned short needed_tailroom; 740 741 struct net_device *master; /* Pointer to master device of a group, 742 * which this device is member of. 743 */ 744 745 /* Interface address info. */ 746 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 747 unsigned char addr_len; /* hardware address length */ 748 unsigned short dev_id; /* for shared network cards */ 749 750 spinlock_t addr_list_lock; 751 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ 752 int uc_count; /* Number of installed ucasts */ 753 int uc_promisc; 754 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 755 int mc_count; /* Number of installed mcasts */ 756 unsigned int promiscuity; 757 unsigned int allmulti; 758 759 760 /* Protocol specific pointers */ 761 762 #ifdef CONFIG_NET_DSA 763 void *dsa_ptr; /* dsa specific data */ 764 #endif 765 void *atalk_ptr; /* AppleTalk link */ 766 void *ip_ptr; /* IPv4 specific data */ 767 void *dn_ptr; /* DECnet specific data */ 768 void *ip6_ptr; /* IPv6 specific data */ 769 void *ec_ptr; /* Econet specific data */ 770 void *ax25_ptr; /* AX.25 specific data */ 771 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 772 assign before registering */ 773 774 /* 775 * Cache line mostly used on receive path (including eth_type_trans()) 776 */ 777 unsigned long last_rx; /* Time of last Rx */ 778 /* Interface address info used in eth_type_trans() */ 779 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast 780 because most packets are unicast) */ 781 782 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 783 784 struct netdev_queue rx_queue; 785 786 struct netdev_queue *_tx ____cacheline_aligned_in_smp; 787 788 /* Number of TX queues allocated at alloc_netdev_mq() time */ 789 unsigned int num_tx_queues; 790 791 /* Number of TX queues currently active in device */ 792 unsigned int real_num_tx_queues; 793 794 unsigned long tx_queue_len; /* Max frames per queue allowed */ 795 spinlock_t tx_global_lock; 796 /* 797 * One part is mostly used on xmit path (device) 798 */ 799 /* These may be needed for future network-power-down code. */ 800 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 801 802 int watchdog_timeo; /* used by dev_watchdog() */ 803 struct timer_list watchdog_timer; 804 805 /* Number of references to this device */ 806 atomic_t refcnt ____cacheline_aligned_in_smp; 807 808 /* delayed register/unregister */ 809 struct list_head todo_list; 810 /* device index hash chain */ 811 struct hlist_node index_hlist; 812 813 struct net_device *link_watch_next; 814 815 /* register/unregister state machine */ 816 enum { NETREG_UNINITIALIZED=0, 817 NETREG_REGISTERED, /* completed register_netdevice */ 818 NETREG_UNREGISTERING, /* called unregister_netdevice */ 819 NETREG_UNREGISTERED, /* completed unregister todo */ 820 NETREG_RELEASED, /* called free_netdev */ 821 NETREG_DUMMY, /* dummy device for NAPI poll */ 822 } reg_state; 823 824 /* Called from unregister, can be used to call free_netdev */ 825 void (*destructor)(struct net_device *dev); 826 827 #ifdef CONFIG_NETPOLL 828 struct netpoll_info *npinfo; 829 #endif 830 831 #ifdef CONFIG_NET_NS 832 /* Network namespace this network device is inside */ 833 struct net *nd_net; 834 #endif 835 836 /* mid-layer private */ 837 void *ml_priv; 838 839 /* bridge stuff */ 840 struct net_bridge_port *br_port; 841 /* macvlan */ 842 struct macvlan_port *macvlan_port; 843 /* GARP */ 844 struct garp_port *garp_port; 845 846 /* class/net/name entry */ 847 struct device dev; 848 /* space for optional statistics and wireless sysfs groups */ 849 struct attribute_group *sysfs_groups[3]; 850 851 /* rtnetlink link ops */ 852 const struct rtnl_link_ops *rtnl_link_ops; 853 854 /* VLAN feature mask */ 855 unsigned long vlan_features; 856 857 /* for setting kernel sock attribute on TCP connection setup */ 858 #define GSO_MAX_SIZE 65536 859 unsigned int gso_max_size; 860 861 #ifdef CONFIG_DCB 862 /* Data Center Bridging netlink ops */ 863 struct dcbnl_rtnl_ops *dcbnl_ops; 864 #endif 865 866 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 867 /* max exchange id for FCoE LRO by ddp */ 868 unsigned int fcoe_ddp_xid; 869 #endif 870 871 #ifdef CONFIG_COMPAT_NET_DEV_OPS 872 struct { 873 int (*init)(struct net_device *dev); 874 void (*uninit)(struct net_device *dev); 875 int (*open)(struct net_device *dev); 876 int (*stop)(struct net_device *dev); 877 int (*hard_start_xmit) (struct sk_buff *skb, 878 struct net_device *dev); 879 u16 (*select_queue)(struct net_device *dev, 880 struct sk_buff *skb); 881 void (*change_rx_flags)(struct net_device *dev, 882 int flags); 883 void (*set_rx_mode)(struct net_device *dev); 884 void (*set_multicast_list)(struct net_device *dev); 885 int (*set_mac_address)(struct net_device *dev, 886 void *addr); 887 int (*validate_addr)(struct net_device *dev); 888 int (*do_ioctl)(struct net_device *dev, 889 struct ifreq *ifr, int cmd); 890 int (*set_config)(struct net_device *dev, 891 struct ifmap *map); 892 int (*change_mtu)(struct net_device *dev, int new_mtu); 893 int (*neigh_setup)(struct net_device *dev, 894 struct neigh_parms *); 895 void (*tx_timeout) (struct net_device *dev); 896 struct net_device_stats* (*get_stats)(struct net_device *dev); 897 void (*vlan_rx_register)(struct net_device *dev, 898 struct vlan_group *grp); 899 void (*vlan_rx_add_vid)(struct net_device *dev, 900 unsigned short vid); 901 void (*vlan_rx_kill_vid)(struct net_device *dev, 902 unsigned short vid); 903 #ifdef CONFIG_NET_POLL_CONTROLLER 904 void (*poll_controller)(struct net_device *dev); 905 #endif 906 }; 907 #endif 908 }; 909 #define to_net_dev(d) container_of(d, struct net_device, dev) 910 911 #define NETDEV_ALIGN 32 912 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) 913 914 static inline 915 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, 916 unsigned int index) 917 { 918 return &dev->_tx[index]; 919 } 920 921 static inline void netdev_for_each_tx_queue(struct net_device *dev, 922 void (*f)(struct net_device *, 923 struct netdev_queue *, 924 void *), 925 void *arg) 926 { 927 unsigned int i; 928 929 for (i = 0; i < dev->num_tx_queues; i++) 930 f(dev, &dev->_tx[i], arg); 931 } 932 933 /* 934 * Net namespace inlines 935 */ 936 static inline 937 struct net *dev_net(const struct net_device *dev) 938 { 939 #ifdef CONFIG_NET_NS 940 return dev->nd_net; 941 #else 942 return &init_net; 943 #endif 944 } 945 946 static inline 947 void dev_net_set(struct net_device *dev, struct net *net) 948 { 949 #ifdef CONFIG_NET_NS 950 release_net(dev->nd_net); 951 dev->nd_net = hold_net(net); 952 #endif 953 } 954 955 static inline bool netdev_uses_dsa_tags(struct net_device *dev) 956 { 957 #ifdef CONFIG_NET_DSA_TAG_DSA 958 if (dev->dsa_ptr != NULL) 959 return dsa_uses_dsa_tags(dev->dsa_ptr); 960 #endif 961 962 return 0; 963 } 964 965 static inline bool netdev_uses_trailer_tags(struct net_device *dev) 966 { 967 #ifdef CONFIG_NET_DSA_TAG_TRAILER 968 if (dev->dsa_ptr != NULL) 969 return dsa_uses_trailer_tags(dev->dsa_ptr); 970 #endif 971 972 return 0; 973 } 974 975 /** 976 * netdev_priv - access network device private data 977 * @dev: network device 978 * 979 * Get network device private data 980 */ 981 static inline void *netdev_priv(const struct net_device *dev) 982 { 983 return (char *)dev + ((sizeof(struct net_device) 984 + NETDEV_ALIGN_CONST) 985 & ~NETDEV_ALIGN_CONST); 986 } 987 988 /* Set the sysfs physical device reference for the network logical device 989 * if set prior to registration will cause a symlink during initialization. 990 */ 991 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 992 993 /** 994 * netif_napi_add - initialize a napi context 995 * @dev: network device 996 * @napi: napi context 997 * @poll: polling function 998 * @weight: default weight 999 * 1000 * netif_napi_add() must be used to initialize a napi context prior to calling 1001 * *any* of the other napi related functions. 1002 */ 1003 void netif_napi_add(struct net_device *dev, struct napi_struct *napi, 1004 int (*poll)(struct napi_struct *, int), int weight); 1005 1006 /** 1007 * netif_napi_del - remove a napi context 1008 * @napi: napi context 1009 * 1010 * netif_napi_del() removes a napi context from the network device napi list 1011 */ 1012 void netif_napi_del(struct napi_struct *napi); 1013 1014 struct napi_gro_cb { 1015 /* This indicates where we are processing relative to skb->data. */ 1016 int data_offset; 1017 1018 /* This is non-zero if the packet may be of the same flow. */ 1019 int same_flow; 1020 1021 /* This is non-zero if the packet cannot be merged with the new skb. */ 1022 int flush; 1023 1024 /* Number of segments aggregated. */ 1025 int count; 1026 1027 /* Free the skb? */ 1028 int free; 1029 }; 1030 1031 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) 1032 1033 struct packet_type { 1034 __be16 type; /* This is really htons(ether_type). */ 1035 struct net_device *dev; /* NULL is wildcarded here */ 1036 int (*func) (struct sk_buff *, 1037 struct net_device *, 1038 struct packet_type *, 1039 struct net_device *); 1040 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 1041 int features); 1042 int (*gso_send_check)(struct sk_buff *skb); 1043 struct sk_buff **(*gro_receive)(struct sk_buff **head, 1044 struct sk_buff *skb); 1045 int (*gro_complete)(struct sk_buff *skb); 1046 void *af_packet_priv; 1047 struct list_head list; 1048 }; 1049 1050 struct napi_gro_fraginfo { 1051 skb_frag_t frags[MAX_SKB_FRAGS]; 1052 unsigned int nr_frags; 1053 unsigned int ip_summed; 1054 unsigned int len; 1055 __wsum csum; 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 void *skb_gro_header(struct sk_buff *skb, unsigned int hlen); 1123 extern int skb_gro_receive(struct sk_buff **head, 1124 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_reset_offset(struct sk_buff *skb) 1142 { 1143 NAPI_GRO_CB(skb)->data_offset = 0; 1144 } 1145 1146 static inline void *skb_gro_mac_header(struct sk_buff *skb) 1147 { 1148 return skb_mac_header(skb) < skb->data ? skb_mac_header(skb) : 1149 page_address(skb_shinfo(skb)->frags[0].page) + 1150 skb_shinfo(skb)->frags[0].page_offset; 1151 } 1152 1153 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 1154 unsigned short type, 1155 const void *daddr, const void *saddr, 1156 unsigned len) 1157 { 1158 if (!dev->header_ops || !dev->header_ops->create) 1159 return 0; 1160 1161 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 1162 } 1163 1164 static inline int dev_parse_header(const struct sk_buff *skb, 1165 unsigned char *haddr) 1166 { 1167 const struct net_device *dev = skb->dev; 1168 1169 if (!dev->header_ops || !dev->header_ops->parse) 1170 return 0; 1171 return dev->header_ops->parse(skb, haddr); 1172 } 1173 1174 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 1175 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 1176 static inline int unregister_gifconf(unsigned int family) 1177 { 1178 return register_gifconf(family, NULL); 1179 } 1180 1181 /* 1182 * Incoming packets are placed on per-cpu queues so that 1183 * no locking is needed. 1184 */ 1185 struct softnet_data 1186 { 1187 struct Qdisc *output_queue; 1188 struct sk_buff_head input_pkt_queue; 1189 struct list_head poll_list; 1190 struct sk_buff *completion_queue; 1191 1192 struct napi_struct backlog; 1193 }; 1194 1195 DECLARE_PER_CPU(struct softnet_data,softnet_data); 1196 1197 #define HAVE_NETIF_QUEUE 1198 1199 extern void __netif_schedule(struct Qdisc *q); 1200 1201 static inline void netif_schedule_queue(struct netdev_queue *txq) 1202 { 1203 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1204 __netif_schedule(txq->qdisc); 1205 } 1206 1207 static inline void netif_tx_schedule_all(struct net_device *dev) 1208 { 1209 unsigned int i; 1210 1211 for (i = 0; i < dev->num_tx_queues; i++) 1212 netif_schedule_queue(netdev_get_tx_queue(dev, i)); 1213 } 1214 1215 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) 1216 { 1217 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1218 } 1219 1220 /** 1221 * netif_start_queue - allow transmit 1222 * @dev: network device 1223 * 1224 * Allow upper layers to call the device hard_start_xmit routine. 1225 */ 1226 static inline void netif_start_queue(struct net_device *dev) 1227 { 1228 netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); 1229 } 1230 1231 static inline void netif_tx_start_all_queues(struct net_device *dev) 1232 { 1233 unsigned int i; 1234 1235 for (i = 0; i < dev->num_tx_queues; i++) { 1236 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1237 netif_tx_start_queue(txq); 1238 } 1239 } 1240 1241 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) 1242 { 1243 #ifdef CONFIG_NETPOLL_TRAP 1244 if (netpoll_trap()) { 1245 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1246 return; 1247 } 1248 #endif 1249 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) 1250 __netif_schedule(dev_queue->qdisc); 1251 } 1252 1253 /** 1254 * netif_wake_queue - restart transmit 1255 * @dev: network device 1256 * 1257 * Allow upper layers to call the device hard_start_xmit routine. 1258 * Used for flow control when transmit resources are available. 1259 */ 1260 static inline void netif_wake_queue(struct net_device *dev) 1261 { 1262 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); 1263 } 1264 1265 static inline void netif_tx_wake_all_queues(struct net_device *dev) 1266 { 1267 unsigned int i; 1268 1269 for (i = 0; i < dev->num_tx_queues; i++) { 1270 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1271 netif_tx_wake_queue(txq); 1272 } 1273 } 1274 1275 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) 1276 { 1277 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1278 } 1279 1280 /** 1281 * netif_stop_queue - stop transmitted packets 1282 * @dev: network device 1283 * 1284 * Stop upper layers calling the device hard_start_xmit routine. 1285 * Used for flow control when transmit resources are unavailable. 1286 */ 1287 static inline void netif_stop_queue(struct net_device *dev) 1288 { 1289 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); 1290 } 1291 1292 static inline void netif_tx_stop_all_queues(struct net_device *dev) 1293 { 1294 unsigned int i; 1295 1296 for (i = 0; i < dev->num_tx_queues; i++) { 1297 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1298 netif_tx_stop_queue(txq); 1299 } 1300 } 1301 1302 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) 1303 { 1304 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1305 } 1306 1307 /** 1308 * netif_queue_stopped - test if transmit queue is flowblocked 1309 * @dev: network device 1310 * 1311 * Test if transmit queue on device is currently unable to send. 1312 */ 1313 static inline int netif_queue_stopped(const struct net_device *dev) 1314 { 1315 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); 1316 } 1317 1318 static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) 1319 { 1320 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); 1321 } 1322 1323 /** 1324 * netif_running - test if up 1325 * @dev: network device 1326 * 1327 * Test if the device has been brought up. 1328 */ 1329 static inline int netif_running(const struct net_device *dev) 1330 { 1331 return test_bit(__LINK_STATE_START, &dev->state); 1332 } 1333 1334 /* 1335 * Routines to manage the subqueues on a device. We only need start 1336 * stop, and a check if it's stopped. All other device management is 1337 * done at the overall netdevice level. 1338 * Also test the device if we're multiqueue. 1339 */ 1340 1341 /** 1342 * netif_start_subqueue - allow sending packets on subqueue 1343 * @dev: network device 1344 * @queue_index: sub queue index 1345 * 1346 * Start individual transmit queue of a device with multiple transmit queues. 1347 */ 1348 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1349 { 1350 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1351 clear_bit(__QUEUE_STATE_XOFF, &txq->state); 1352 } 1353 1354 /** 1355 * netif_stop_subqueue - stop sending packets on subqueue 1356 * @dev: network device 1357 * @queue_index: sub queue index 1358 * 1359 * Stop individual transmit queue of a device with multiple transmit queues. 1360 */ 1361 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1362 { 1363 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1364 #ifdef CONFIG_NETPOLL_TRAP 1365 if (netpoll_trap()) 1366 return; 1367 #endif 1368 set_bit(__QUEUE_STATE_XOFF, &txq->state); 1369 } 1370 1371 /** 1372 * netif_subqueue_stopped - test status of subqueue 1373 * @dev: network device 1374 * @queue_index: sub queue index 1375 * 1376 * Check individual transmit queue of a device with multiple transmit queues. 1377 */ 1378 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1379 u16 queue_index) 1380 { 1381 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1382 return test_bit(__QUEUE_STATE_XOFF, &txq->state); 1383 } 1384 1385 static inline int netif_subqueue_stopped(const struct net_device *dev, 1386 struct sk_buff *skb) 1387 { 1388 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1389 } 1390 1391 /** 1392 * netif_wake_subqueue - allow sending packets on subqueue 1393 * @dev: network device 1394 * @queue_index: sub queue index 1395 * 1396 * Resume individual transmit queue of a device with multiple transmit queues. 1397 */ 1398 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1399 { 1400 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1401 #ifdef CONFIG_NETPOLL_TRAP 1402 if (netpoll_trap()) 1403 return; 1404 #endif 1405 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) 1406 __netif_schedule(txq->qdisc); 1407 } 1408 1409 /** 1410 * netif_is_multiqueue - test if device has multiple transmit queues 1411 * @dev: network device 1412 * 1413 * Check if device has multiple transmit queues 1414 */ 1415 static inline int netif_is_multiqueue(const struct net_device *dev) 1416 { 1417 return (dev->num_tx_queues > 1); 1418 } 1419 1420 /* Use this variant when it is known for sure that it 1421 * is executing from hardware interrupt context or with hardware interrupts 1422 * disabled. 1423 */ 1424 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1425 1426 /* Use this variant in places where it could be invoked 1427 * from either hardware interrupt or other context, with hardware interrupts 1428 * either disabled or enabled. 1429 */ 1430 extern void dev_kfree_skb_any(struct sk_buff *skb); 1431 1432 #define HAVE_NETIF_RX 1 1433 extern int netif_rx(struct sk_buff *skb); 1434 extern int netif_rx_ni(struct sk_buff *skb); 1435 #define HAVE_NETIF_RECEIVE_SKB 1 1436 extern int netif_receive_skb(struct sk_buff *skb); 1437 extern void napi_gro_flush(struct napi_struct *napi); 1438 extern int dev_gro_receive(struct napi_struct *napi, 1439 struct sk_buff *skb); 1440 extern int napi_skb_finish(int ret, struct sk_buff *skb); 1441 extern int napi_gro_receive(struct napi_struct *napi, 1442 struct sk_buff *skb); 1443 extern void napi_reuse_skb(struct napi_struct *napi, 1444 struct sk_buff *skb); 1445 extern struct sk_buff * napi_fraginfo_skb(struct napi_struct *napi, 1446 struct napi_gro_fraginfo *info); 1447 extern int napi_frags_finish(struct napi_struct *napi, 1448 struct sk_buff *skb, int ret); 1449 extern int napi_gro_frags(struct napi_struct *napi, 1450 struct napi_gro_fraginfo *info); 1451 extern void netif_nit_deliver(struct sk_buff *skb); 1452 extern int dev_valid_name(const char *name); 1453 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1454 extern int dev_ethtool(struct net *net, struct ifreq *); 1455 extern unsigned dev_get_flags(const struct net_device *); 1456 extern int dev_change_flags(struct net_device *, unsigned); 1457 extern int dev_change_name(struct net_device *, const char *); 1458 extern int dev_set_alias(struct net_device *, const char *, size_t); 1459 extern int dev_change_net_namespace(struct net_device *, 1460 struct net *, const char *); 1461 extern int dev_set_mtu(struct net_device *, int); 1462 extern int dev_set_mac_address(struct net_device *, 1463 struct sockaddr *); 1464 extern int dev_hard_start_xmit(struct sk_buff *skb, 1465 struct net_device *dev, 1466 struct netdev_queue *txq); 1467 1468 extern int netdev_budget; 1469 1470 /* Called by rtnetlink.c:rtnl_unlock() */ 1471 extern void netdev_run_todo(void); 1472 1473 /** 1474 * dev_put - release reference to device 1475 * @dev: network device 1476 * 1477 * Release reference to device to allow it to be freed. 1478 */ 1479 static inline void dev_put(struct net_device *dev) 1480 { 1481 atomic_dec(&dev->refcnt); 1482 } 1483 1484 /** 1485 * dev_hold - get reference to device 1486 * @dev: network device 1487 * 1488 * Hold reference to device to keep it from being freed. 1489 */ 1490 static inline void dev_hold(struct net_device *dev) 1491 { 1492 atomic_inc(&dev->refcnt); 1493 } 1494 1495 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1496 * and _off may be called from IRQ context, but it is caller 1497 * who is responsible for serialization of these calls. 1498 * 1499 * The name carrier is inappropriate, these functions should really be 1500 * called netif_lowerlayer_*() because they represent the state of any 1501 * kind of lower layer not just hardware media. 1502 */ 1503 1504 extern void linkwatch_fire_event(struct net_device *dev); 1505 1506 /** 1507 * netif_carrier_ok - test if carrier present 1508 * @dev: network device 1509 * 1510 * Check if carrier is present on device 1511 */ 1512 static inline int netif_carrier_ok(const struct net_device *dev) 1513 { 1514 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1515 } 1516 1517 extern void __netdev_watchdog_up(struct net_device *dev); 1518 1519 extern void netif_carrier_on(struct net_device *dev); 1520 1521 extern void netif_carrier_off(struct net_device *dev); 1522 1523 /** 1524 * netif_dormant_on - mark device as dormant. 1525 * @dev: network device 1526 * 1527 * Mark device as dormant (as per RFC2863). 1528 * 1529 * The dormant state indicates that the relevant interface is not 1530 * actually in a condition to pass packets (i.e., it is not 'up') but is 1531 * in a "pending" state, waiting for some external event. For "on- 1532 * demand" interfaces, this new state identifies the situation where the 1533 * interface is waiting for events to place it in the up state. 1534 * 1535 */ 1536 static inline void netif_dormant_on(struct net_device *dev) 1537 { 1538 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1539 linkwatch_fire_event(dev); 1540 } 1541 1542 /** 1543 * netif_dormant_off - set device as not dormant. 1544 * @dev: network device 1545 * 1546 * Device is not in dormant state. 1547 */ 1548 static inline void netif_dormant_off(struct net_device *dev) 1549 { 1550 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1551 linkwatch_fire_event(dev); 1552 } 1553 1554 /** 1555 * netif_dormant - test if carrier present 1556 * @dev: network device 1557 * 1558 * Check if carrier is present on device 1559 */ 1560 static inline int netif_dormant(const struct net_device *dev) 1561 { 1562 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1563 } 1564 1565 1566 /** 1567 * netif_oper_up - test if device is operational 1568 * @dev: network device 1569 * 1570 * Check if carrier is operational 1571 */ 1572 static inline int netif_oper_up(const struct net_device *dev) { 1573 return (dev->operstate == IF_OPER_UP || 1574 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1575 } 1576 1577 /** 1578 * netif_device_present - is device available or removed 1579 * @dev: network device 1580 * 1581 * Check if device has not been removed from system. 1582 */ 1583 static inline int netif_device_present(struct net_device *dev) 1584 { 1585 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1586 } 1587 1588 extern void netif_device_detach(struct net_device *dev); 1589 1590 extern void netif_device_attach(struct net_device *dev); 1591 1592 /* 1593 * Network interface message level settings 1594 */ 1595 #define HAVE_NETIF_MSG 1 1596 1597 enum { 1598 NETIF_MSG_DRV = 0x0001, 1599 NETIF_MSG_PROBE = 0x0002, 1600 NETIF_MSG_LINK = 0x0004, 1601 NETIF_MSG_TIMER = 0x0008, 1602 NETIF_MSG_IFDOWN = 0x0010, 1603 NETIF_MSG_IFUP = 0x0020, 1604 NETIF_MSG_RX_ERR = 0x0040, 1605 NETIF_MSG_TX_ERR = 0x0080, 1606 NETIF_MSG_TX_QUEUED = 0x0100, 1607 NETIF_MSG_INTR = 0x0200, 1608 NETIF_MSG_TX_DONE = 0x0400, 1609 NETIF_MSG_RX_STATUS = 0x0800, 1610 NETIF_MSG_PKTDATA = 0x1000, 1611 NETIF_MSG_HW = 0x2000, 1612 NETIF_MSG_WOL = 0x4000, 1613 }; 1614 1615 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1616 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1617 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1618 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1619 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1620 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1621 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1622 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1623 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1624 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1625 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1626 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1627 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1628 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1629 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1630 1631 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1632 { 1633 /* use default */ 1634 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1635 return default_msg_enable_bits; 1636 if (debug_value == 0) /* no output */ 1637 return 0; 1638 /* set low N bits */ 1639 return (1 << debug_value) - 1; 1640 } 1641 1642 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) 1643 { 1644 spin_lock(&txq->_xmit_lock); 1645 txq->xmit_lock_owner = cpu; 1646 } 1647 1648 static inline void __netif_tx_lock_bh(struct netdev_queue *txq) 1649 { 1650 spin_lock_bh(&txq->_xmit_lock); 1651 txq->xmit_lock_owner = smp_processor_id(); 1652 } 1653 1654 static inline int __netif_tx_trylock(struct netdev_queue *txq) 1655 { 1656 int ok = spin_trylock(&txq->_xmit_lock); 1657 if (likely(ok)) 1658 txq->xmit_lock_owner = smp_processor_id(); 1659 return ok; 1660 } 1661 1662 static inline void __netif_tx_unlock(struct netdev_queue *txq) 1663 { 1664 txq->xmit_lock_owner = -1; 1665 spin_unlock(&txq->_xmit_lock); 1666 } 1667 1668 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) 1669 { 1670 txq->xmit_lock_owner = -1; 1671 spin_unlock_bh(&txq->_xmit_lock); 1672 } 1673 1674 /** 1675 * netif_tx_lock - grab network device transmit lock 1676 * @dev: network device 1677 * 1678 * Get network device transmit lock 1679 */ 1680 static inline void netif_tx_lock(struct net_device *dev) 1681 { 1682 unsigned int i; 1683 int cpu; 1684 1685 spin_lock(&dev->tx_global_lock); 1686 cpu = smp_processor_id(); 1687 for (i = 0; i < dev->num_tx_queues; i++) { 1688 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1689 1690 /* We are the only thread of execution doing a 1691 * freeze, but we have to grab the _xmit_lock in 1692 * order to synchronize with threads which are in 1693 * the ->hard_start_xmit() handler and already 1694 * checked the frozen bit. 1695 */ 1696 __netif_tx_lock(txq, cpu); 1697 set_bit(__QUEUE_STATE_FROZEN, &txq->state); 1698 __netif_tx_unlock(txq); 1699 } 1700 } 1701 1702 static inline void netif_tx_lock_bh(struct net_device *dev) 1703 { 1704 local_bh_disable(); 1705 netif_tx_lock(dev); 1706 } 1707 1708 static inline void netif_tx_unlock(struct net_device *dev) 1709 { 1710 unsigned int i; 1711 1712 for (i = 0; i < dev->num_tx_queues; i++) { 1713 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1714 1715 /* No need to grab the _xmit_lock here. If the 1716 * queue is not stopped for another reason, we 1717 * force a schedule. 1718 */ 1719 clear_bit(__QUEUE_STATE_FROZEN, &txq->state); 1720 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1721 __netif_schedule(txq->qdisc); 1722 } 1723 spin_unlock(&dev->tx_global_lock); 1724 } 1725 1726 static inline void netif_tx_unlock_bh(struct net_device *dev) 1727 { 1728 netif_tx_unlock(dev); 1729 local_bh_enable(); 1730 } 1731 1732 #define HARD_TX_LOCK(dev, txq, cpu) { \ 1733 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1734 __netif_tx_lock(txq, cpu); \ 1735 } \ 1736 } 1737 1738 #define HARD_TX_UNLOCK(dev, txq) { \ 1739 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1740 __netif_tx_unlock(txq); \ 1741 } \ 1742 } 1743 1744 static inline void netif_tx_disable(struct net_device *dev) 1745 { 1746 unsigned int i; 1747 int cpu; 1748 1749 local_bh_disable(); 1750 cpu = smp_processor_id(); 1751 for (i = 0; i < dev->num_tx_queues; i++) { 1752 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1753 1754 __netif_tx_lock(txq, cpu); 1755 netif_tx_stop_queue(txq); 1756 __netif_tx_unlock(txq); 1757 } 1758 local_bh_enable(); 1759 } 1760 1761 static inline void netif_addr_lock(struct net_device *dev) 1762 { 1763 spin_lock(&dev->addr_list_lock); 1764 } 1765 1766 static inline void netif_addr_lock_bh(struct net_device *dev) 1767 { 1768 spin_lock_bh(&dev->addr_list_lock); 1769 } 1770 1771 static inline void netif_addr_unlock(struct net_device *dev) 1772 { 1773 spin_unlock(&dev->addr_list_lock); 1774 } 1775 1776 static inline void netif_addr_unlock_bh(struct net_device *dev) 1777 { 1778 spin_unlock_bh(&dev->addr_list_lock); 1779 } 1780 1781 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1782 1783 extern void ether_setup(struct net_device *dev); 1784 1785 /* Support for loadable net-drivers */ 1786 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1787 void (*setup)(struct net_device *), 1788 unsigned int queue_count); 1789 #define alloc_netdev(sizeof_priv, name, setup) \ 1790 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1791 extern int register_netdev(struct net_device *dev); 1792 extern void unregister_netdev(struct net_device *dev); 1793 /* Functions used for secondary unicast and multicast support */ 1794 extern void dev_set_rx_mode(struct net_device *dev); 1795 extern void __dev_set_rx_mode(struct net_device *dev); 1796 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); 1797 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); 1798 extern int dev_unicast_sync(struct net_device *to, struct net_device *from); 1799 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); 1800 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1801 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1802 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1803 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1804 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1805 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1806 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1807 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1808 extern int dev_set_promiscuity(struct net_device *dev, int inc); 1809 extern int dev_set_allmulti(struct net_device *dev, int inc); 1810 extern void netdev_state_change(struct net_device *dev); 1811 extern void netdev_bonding_change(struct net_device *dev); 1812 extern void netdev_features_change(struct net_device *dev); 1813 /* Load a device via the kmod */ 1814 extern void dev_load(struct net *net, const char *name); 1815 extern void dev_mcast_init(void); 1816 extern const struct net_device_stats *dev_get_stats(struct net_device *dev); 1817 1818 extern int netdev_max_backlog; 1819 extern int weight_p; 1820 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1821 extern int skb_checksum_help(struct sk_buff *skb); 1822 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1823 #ifdef CONFIG_BUG 1824 extern void netdev_rx_csum_fault(struct net_device *dev); 1825 #else 1826 static inline void netdev_rx_csum_fault(struct net_device *dev) 1827 { 1828 } 1829 #endif 1830 /* rx skb timestamps */ 1831 extern void net_enable_timestamp(void); 1832 extern void net_disable_timestamp(void); 1833 1834 #ifdef CONFIG_PROC_FS 1835 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1836 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1837 extern void dev_seq_stop(struct seq_file *seq, void *v); 1838 #endif 1839 1840 extern int netdev_class_create_file(struct class_attribute *class_attr); 1841 extern void netdev_class_remove_file(struct class_attribute *class_attr); 1842 1843 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); 1844 1845 extern void linkwatch_run_queue(void); 1846 1847 unsigned long netdev_increment_features(unsigned long all, unsigned long one, 1848 unsigned long mask); 1849 unsigned long netdev_fix_features(unsigned long features, const char *name); 1850 1851 static inline int net_gso_ok(int features, int gso_type) 1852 { 1853 int feature = gso_type << NETIF_F_GSO_SHIFT; 1854 return (features & feature) == feature; 1855 } 1856 1857 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1858 { 1859 return net_gso_ok(features, skb_shinfo(skb)->gso_type); 1860 } 1861 1862 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1863 { 1864 return skb_is_gso(skb) && 1865 (!skb_gso_ok(skb, dev->features) || 1866 (skb_shinfo(skb)->frag_list && 1867 !(dev->features & NETIF_F_FRAGLIST)) || 1868 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1869 } 1870 1871 static inline void netif_set_gso_max_size(struct net_device *dev, 1872 unsigned int size) 1873 { 1874 dev->gso_max_size = size; 1875 } 1876 1877 /* On bonding slaves other than the currently active slave, suppress 1878 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1879 * ARP on active-backup slaves with arp_validate enabled. 1880 */ 1881 static inline int skb_bond_should_drop(struct sk_buff *skb) 1882 { 1883 struct net_device *dev = skb->dev; 1884 struct net_device *master = dev->master; 1885 1886 if (master) { 1887 if (master->priv_flags & IFF_MASTER_ARPMON) 1888 dev->last_rx = jiffies; 1889 1890 if (dev->priv_flags & IFF_SLAVE_INACTIVE) { 1891 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1892 skb->protocol == __cpu_to_be16(ETH_P_ARP)) 1893 return 0; 1894 1895 if (master->priv_flags & IFF_MASTER_ALB) { 1896 if (skb->pkt_type != PACKET_BROADCAST && 1897 skb->pkt_type != PACKET_MULTICAST) 1898 return 0; 1899 } 1900 if (master->priv_flags & IFF_MASTER_8023AD && 1901 skb->protocol == __cpu_to_be16(ETH_P_SLOW)) 1902 return 0; 1903 1904 return 1; 1905 } 1906 } 1907 return 0; 1908 } 1909 1910 extern struct pernet_operations __net_initdata loopback_net_ops; 1911 #endif /* __KERNEL__ */ 1912 1913 #endif /* _LINUX_DEV_H */ 1914