1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Definitions for the Interfaces handler. 7 * 8 * Version: @(#)dev.h 1.0.10 08/12/93 9 * 10 * Authors: Ross Biro 11 * Fred N. van Kempen, <[email protected]> 12 * Corey Minyard <[email protected]> 13 * Donald J. Becker, <[email protected]> 14 * Alan Cox, <[email protected]> 15 * Bjorn Ekwall. <[email protected]> 16 * Pekka Riikonen <[email protected]> 17 * 18 * This program is free software; you can redistribute it and/or 19 * modify it under the terms of the GNU General Public License 20 * as published by the Free Software Foundation; either version 21 * 2 of the License, or (at your option) any later version. 22 * 23 * Moved to /usr/include/linux for NET3 24 */ 25 #ifndef _LINUX_NETDEVICE_H 26 #define _LINUX_NETDEVICE_H 27 28 #include <linux/if.h> 29 #include <linux/if_ether.h> 30 #include <linux/if_packet.h> 31 32 #ifdef __KERNEL__ 33 #include <linux/timer.h> 34 #include <linux/delay.h> 35 #include <asm/atomic.h> 36 #include <asm/cache.h> 37 #include <asm/byteorder.h> 38 39 #include <linux/device.h> 40 #include <linux/percpu.h> 41 #include <linux/dmaengine.h> 42 #include <linux/workqueue.h> 43 44 #include <net/net_namespace.h> 45 46 struct vlan_group; 47 struct ethtool_ops; 48 struct netpoll_info; 49 /* 802.11 specific */ 50 struct wireless_dev; 51 /* source back-compat hooks */ 52 #define SET_ETHTOOL_OPS(netdev,ops) \ 53 ( (netdev)->ethtool_ops = (ops) ) 54 55 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev 56 functions are available. */ 57 #define HAVE_FREE_NETDEV /* free_netdev() */ 58 #define HAVE_NETDEV_PRIV /* netdev_priv() */ 59 60 #define NET_XMIT_SUCCESS 0 61 #define NET_XMIT_DROP 1 /* skb dropped */ 62 #define NET_XMIT_CN 2 /* congestion notification */ 63 #define NET_XMIT_POLICED 3 /* skb is shot by police */ 64 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue; 65 (TC use only - dev_queue_xmit 66 returns this as NET_XMIT_SUCCESS) */ 67 68 /* Backlog congestion levels */ 69 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ 70 #define NET_RX_DROP 1 /* packet dropped */ 71 #define NET_RX_CN_LOW 2 /* storm alert, just in case */ 72 #define NET_RX_CN_MOD 3 /* Storm on its way! */ 73 #define NET_RX_CN_HIGH 4 /* The storm is here */ 74 #define NET_RX_BAD 5 /* packet dropped due to kernel error */ 75 76 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It 77 * indicates that the device will soon be dropping packets, or already drops 78 * some packets of the same priority; prompting us to send less aggressively. */ 79 #define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e)) 80 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) 81 82 #endif 83 84 #define MAX_ADDR_LEN 32 /* Largest hardware address length */ 85 86 /* Driver transmit return codes */ 87 #define NETDEV_TX_OK 0 /* driver took care of packet */ 88 #define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ 89 #define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ 90 91 /* 92 * Compute the worst case header length according to the protocols 93 * used. 94 */ 95 96 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR) 97 #define LL_MAX_HEADER 32 98 #else 99 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 100 #define LL_MAX_HEADER 96 101 #else 102 #define LL_MAX_HEADER 48 103 #endif 104 #endif 105 106 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ 107 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ 108 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ 109 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) 110 #define MAX_HEADER LL_MAX_HEADER 111 #else 112 #define MAX_HEADER (LL_MAX_HEADER + 48) 113 #endif 114 115 struct net_device_subqueue 116 { 117 /* Give a control state for each queue. This struct may contain 118 * per-queue locks in the future. 119 */ 120 unsigned long state; 121 }; 122 123 /* 124 * Network device statistics. Akin to the 2.0 ether stats but 125 * with byte counters. 126 */ 127 128 struct net_device_stats 129 { 130 unsigned long rx_packets; /* total packets received */ 131 unsigned long tx_packets; /* total packets transmitted */ 132 unsigned long rx_bytes; /* total bytes received */ 133 unsigned long tx_bytes; /* total bytes transmitted */ 134 unsigned long rx_errors; /* bad packets received */ 135 unsigned long tx_errors; /* packet transmit problems */ 136 unsigned long rx_dropped; /* no space in linux buffers */ 137 unsigned long tx_dropped; /* no space available in linux */ 138 unsigned long multicast; /* multicast packets received */ 139 unsigned long collisions; 140 141 /* detailed rx_errors: */ 142 unsigned long rx_length_errors; 143 unsigned long rx_over_errors; /* receiver ring buff overflow */ 144 unsigned long rx_crc_errors; /* recved pkt with crc error */ 145 unsigned long rx_frame_errors; /* recv'd frame alignment error */ 146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */ 147 unsigned long rx_missed_errors; /* receiver missed packet */ 148 149 /* detailed tx_errors */ 150 unsigned long tx_aborted_errors; 151 unsigned long tx_carrier_errors; 152 unsigned long tx_fifo_errors; 153 unsigned long tx_heartbeat_errors; 154 unsigned long tx_window_errors; 155 156 /* for cslip etc */ 157 unsigned long rx_compressed; 158 unsigned long tx_compressed; 159 }; 160 161 162 /* Media selection options. */ 163 enum { 164 IF_PORT_UNKNOWN = 0, 165 IF_PORT_10BASE2, 166 IF_PORT_10BASET, 167 IF_PORT_AUI, 168 IF_PORT_100BASET, 169 IF_PORT_100BASETX, 170 IF_PORT_100BASEFX 171 }; 172 173 #ifdef __KERNEL__ 174 175 #include <linux/cache.h> 176 #include <linux/skbuff.h> 177 178 struct neighbour; 179 struct neigh_parms; 180 struct sk_buff; 181 182 struct netif_rx_stats 183 { 184 unsigned total; 185 unsigned dropped; 186 unsigned time_squeeze; 187 unsigned cpu_collision; 188 }; 189 190 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); 191 192 struct dev_addr_list 193 { 194 struct dev_addr_list *next; 195 u8 da_addr[MAX_ADDR_LEN]; 196 u8 da_addrlen; 197 u8 da_synced; 198 int da_users; 199 int da_gusers; 200 }; 201 202 /* 203 * We tag multicasts with these structures. 204 */ 205 206 #define dev_mc_list dev_addr_list 207 #define dmi_addr da_addr 208 #define dmi_addrlen da_addrlen 209 #define dmi_users da_users 210 #define dmi_gusers da_gusers 211 212 struct hh_cache 213 { 214 struct hh_cache *hh_next; /* Next entry */ 215 atomic_t hh_refcnt; /* number of users */ 216 /* 217 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate 218 * cache line on SMP. 219 * They are mostly read, but hh_refcnt may be changed quite frequently, 220 * incurring cache line ping pongs. 221 */ 222 __be16 hh_type ____cacheline_aligned_in_smp; 223 /* protocol identifier, f.e ETH_P_IP 224 * NOTE: For VLANs, this will be the 225 * encapuslated type. --BLG 226 */ 227 u16 hh_len; /* length of header */ 228 int (*hh_output)(struct sk_buff *skb); 229 seqlock_t hh_lock; 230 231 /* cached hardware header; allow for machine alignment needs. */ 232 #define HH_DATA_MOD 16 233 #define HH_DATA_OFF(__len) \ 234 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) 235 #define HH_DATA_ALIGN(__len) \ 236 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) 237 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; 238 }; 239 240 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. 241 * Alternative is: 242 * dev->hard_header_len ? (dev->hard_header_len + 243 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 244 * 245 * We could use other alignment values, but we must maintain the 246 * relationship HH alignment <= LL alignment. 247 */ 248 #define LL_RESERVED_SPACE(dev) \ 249 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 250 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ 251 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 252 253 struct header_ops { 254 int (*create) (struct sk_buff *skb, struct net_device *dev, 255 unsigned short type, const void *daddr, 256 const void *saddr, unsigned len); 257 int (*parse)(const struct sk_buff *skb, unsigned char *haddr); 258 int (*rebuild)(struct sk_buff *skb); 259 #define HAVE_HEADER_CACHE 260 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); 261 void (*cache_update)(struct hh_cache *hh, 262 const struct net_device *dev, 263 const unsigned char *haddr); 264 }; 265 266 /* These flag bits are private to the generic network queueing 267 * layer, they may not be explicitly referenced by any other 268 * code. 269 */ 270 271 enum netdev_state_t 272 { 273 __LINK_STATE_XOFF=0, 274 __LINK_STATE_START, 275 __LINK_STATE_PRESENT, 276 __LINK_STATE_SCHED, 277 __LINK_STATE_NOCARRIER, 278 __LINK_STATE_LINKWATCH_PENDING, 279 __LINK_STATE_DORMANT, 280 __LINK_STATE_QDISC_RUNNING, 281 }; 282 283 284 /* 285 * This structure holds at boot time configured netdevice settings. They 286 * are then used in the device probing. 287 */ 288 struct netdev_boot_setup { 289 char name[IFNAMSIZ]; 290 struct ifmap map; 291 }; 292 #define NETDEV_BOOT_SETUP_MAX 8 293 294 extern int __init netdev_boot_setup(char *str); 295 296 /* 297 * Structure for NAPI scheduling similar to tasklet but with weighting 298 */ 299 struct napi_struct { 300 /* The poll_list must only be managed by the entity which 301 * changes the state of the NAPI_STATE_SCHED bit. This means 302 * whoever atomically sets that bit can add this napi_struct 303 * to the per-cpu poll_list, and whoever clears that bit 304 * can remove from the list right before clearing the bit. 305 */ 306 struct list_head poll_list; 307 308 unsigned long state; 309 int weight; 310 int (*poll)(struct napi_struct *, int); 311 #ifdef CONFIG_NETPOLL 312 spinlock_t poll_lock; 313 int poll_owner; 314 struct net_device *dev; 315 struct list_head dev_list; 316 #endif 317 }; 318 319 enum 320 { 321 NAPI_STATE_SCHED, /* Poll is scheduled */ 322 NAPI_STATE_DISABLE, /* Disable pending */ 323 }; 324 325 extern void FASTCALL(__napi_schedule(struct napi_struct *n)); 326 327 static inline int napi_disable_pending(struct napi_struct *n) 328 { 329 return test_bit(NAPI_STATE_DISABLE, &n->state); 330 } 331 332 /** 333 * napi_schedule_prep - check if napi can be scheduled 334 * @n: napi context 335 * 336 * Test if NAPI routine is already running, and if not mark 337 * it as running. This is used as a condition variable 338 * insure only one NAPI poll instance runs. We also make 339 * sure there is no pending NAPI disable. 340 */ 341 static inline int napi_schedule_prep(struct napi_struct *n) 342 { 343 return !napi_disable_pending(n) && 344 !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 345 } 346 347 /** 348 * napi_schedule - schedule NAPI poll 349 * @n: napi context 350 * 351 * Schedule NAPI poll routine to be called if it is not already 352 * running. 353 */ 354 static inline void napi_schedule(struct napi_struct *n) 355 { 356 if (napi_schedule_prep(n)) 357 __napi_schedule(n); 358 } 359 360 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 361 static inline int napi_reschedule(struct napi_struct *napi) 362 { 363 if (napi_schedule_prep(napi)) { 364 __napi_schedule(napi); 365 return 1; 366 } 367 return 0; 368 } 369 370 /** 371 * napi_complete - NAPI processing complete 372 * @n: napi context 373 * 374 * Mark NAPI processing as complete. 375 */ 376 static inline void __napi_complete(struct napi_struct *n) 377 { 378 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 379 list_del(&n->poll_list); 380 smp_mb__before_clear_bit(); 381 clear_bit(NAPI_STATE_SCHED, &n->state); 382 } 383 384 static inline void napi_complete(struct napi_struct *n) 385 { 386 local_irq_disable(); 387 __napi_complete(n); 388 local_irq_enable(); 389 } 390 391 /** 392 * napi_disable - prevent NAPI from scheduling 393 * @n: napi context 394 * 395 * Stop NAPI from being scheduled on this context. 396 * Waits till any outstanding processing completes. 397 */ 398 static inline void napi_disable(struct napi_struct *n) 399 { 400 set_bit(NAPI_STATE_DISABLE, &n->state); 401 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 402 msleep(1); 403 clear_bit(NAPI_STATE_DISABLE, &n->state); 404 } 405 406 /** 407 * napi_enable - enable NAPI scheduling 408 * @n: napi context 409 * 410 * Resume NAPI from being scheduled on this context. 411 * Must be paired with napi_disable. 412 */ 413 static inline void napi_enable(struct napi_struct *n) 414 { 415 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 416 smp_mb__before_clear_bit(); 417 clear_bit(NAPI_STATE_SCHED, &n->state); 418 } 419 420 #ifdef CONFIG_SMP 421 /** 422 * napi_synchronize - wait until NAPI is not running 423 * @n: napi context 424 * 425 * Wait until NAPI is done being scheduled on this context. 426 * Waits till any outstanding processing completes but 427 * does not disable future activations. 428 */ 429 static inline void napi_synchronize(const struct napi_struct *n) 430 { 431 while (test_bit(NAPI_STATE_SCHED, &n->state)) 432 msleep(1); 433 } 434 #else 435 # define napi_synchronize(n) barrier() 436 #endif 437 438 /* 439 * The DEVICE structure. 440 * Actually, this whole structure is a big mistake. It mixes I/O 441 * data with strictly "high-level" data, and it has to know about 442 * almost every data structure used in the INET module. 443 * 444 * FIXME: cleanup struct net_device such that network protocol info 445 * moves out. 446 */ 447 448 struct net_device 449 { 450 451 /* 452 * This is the first field of the "visible" part of this structure 453 * (i.e. as seen by users in the "Space.c" file). It is the name 454 * the interface. 455 */ 456 char name[IFNAMSIZ]; 457 /* device name hash chain */ 458 struct hlist_node name_hlist; 459 460 /* 461 * I/O specific fields 462 * FIXME: Merge these and struct ifmap into one 463 */ 464 unsigned long mem_end; /* shared mem end */ 465 unsigned long mem_start; /* shared mem start */ 466 unsigned long base_addr; /* device I/O address */ 467 unsigned int irq; /* device IRQ number */ 468 469 /* 470 * Some hardware also needs these fields, but they are not 471 * part of the usual set specified in Space.c. 472 */ 473 474 unsigned char if_port; /* Selectable AUI, TP,..*/ 475 unsigned char dma; /* DMA channel */ 476 477 unsigned long state; 478 479 struct list_head dev_list; 480 #ifdef CONFIG_NETPOLL 481 struct list_head napi_list; 482 #endif 483 484 /* The device initialization function. Called only once. */ 485 int (*init)(struct net_device *dev); 486 487 /* ------- Fields preinitialized in Space.c finish here ------- */ 488 489 /* Net device features */ 490 unsigned long features; 491 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 492 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 493 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 494 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 495 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 496 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 497 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 498 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 499 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 500 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 501 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 502 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 503 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 504 /* do not use LLTX in new drivers */ 505 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 506 #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ 507 #define NETIF_F_LRO 32768 /* large receive offload */ 508 509 /* Segmentation offload features */ 510 #define NETIF_F_GSO_SHIFT 16 511 #define NETIF_F_GSO_MASK 0xffff0000 512 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 513 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 514 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 515 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 516 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 517 518 /* List of features with software fallbacks. */ 519 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 520 521 522 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 523 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 524 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 525 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 526 527 struct net_device *next_sched; 528 529 /* Interface index. Unique device identifier */ 530 int ifindex; 531 int iflink; 532 533 534 struct net_device_stats* (*get_stats)(struct net_device *dev); 535 struct net_device_stats stats; 536 537 #ifdef CONFIG_WIRELESS_EXT 538 /* List of functions to handle Wireless Extensions (instead of ioctl). 539 * See <net/iw_handler.h> for details. Jean II */ 540 const struct iw_handler_def * wireless_handlers; 541 /* Instance data managed by the core of Wireless Extensions. */ 542 struct iw_public_data * wireless_data; 543 #endif 544 const struct ethtool_ops *ethtool_ops; 545 546 /* Hardware header description */ 547 const struct header_ops *header_ops; 548 549 /* 550 * This marks the end of the "visible" part of the structure. All 551 * fields hereafter are internal to the system, and may change at 552 * will (read: may be cleaned up at will). 553 */ 554 555 556 unsigned int flags; /* interface flags (a la BSD) */ 557 unsigned short gflags; 558 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 559 unsigned short padded; /* How much padding added by alloc_netdev() */ 560 561 unsigned char operstate; /* RFC2863 operstate */ 562 unsigned char link_mode; /* mapping policy to operstate */ 563 564 unsigned mtu; /* interface MTU value */ 565 unsigned short type; /* interface hardware type */ 566 unsigned short hard_header_len; /* hardware hdr length */ 567 568 struct net_device *master; /* Pointer to master device of a group, 569 * which this device is member of. 570 */ 571 572 /* Interface address info. */ 573 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 574 unsigned char addr_len; /* hardware address length */ 575 unsigned short dev_id; /* for shared network cards */ 576 577 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ 578 int uc_count; /* Number of installed ucasts */ 579 int uc_promisc; 580 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 581 int mc_count; /* Number of installed mcasts */ 582 int promiscuity; 583 int allmulti; 584 585 586 /* Protocol specific pointers */ 587 588 void *atalk_ptr; /* AppleTalk link */ 589 void *ip_ptr; /* IPv4 specific data */ 590 void *dn_ptr; /* DECnet specific data */ 591 void *ip6_ptr; /* IPv6 specific data */ 592 void *ec_ptr; /* Econet specific data */ 593 void *ax25_ptr; /* AX.25 specific data */ 594 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 595 assign before registering */ 596 597 /* 598 * Cache line mostly used on receive path (including eth_type_trans()) 599 */ 600 unsigned long last_rx; /* Time of last Rx */ 601 /* Interface address info used in eth_type_trans() */ 602 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast 603 because most packets are unicast) */ 604 605 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 606 607 /* 608 * Cache line mostly used on queue transmit path (qdisc) 609 */ 610 /* device queue lock */ 611 spinlock_t queue_lock ____cacheline_aligned_in_smp; 612 struct Qdisc *qdisc; 613 struct Qdisc *qdisc_sleeping; 614 struct list_head qdisc_list; 615 unsigned long tx_queue_len; /* Max frames per queue allowed */ 616 617 /* Partially transmitted GSO packet. */ 618 struct sk_buff *gso_skb; 619 620 /* ingress path synchronizer */ 621 spinlock_t ingress_lock; 622 struct Qdisc *qdisc_ingress; 623 624 /* 625 * One part is mostly used on xmit path (device) 626 */ 627 /* hard_start_xmit synchronizer */ 628 spinlock_t _xmit_lock ____cacheline_aligned_in_smp; 629 /* cpu id of processor entered to hard_start_xmit or -1, 630 if nobody entered there. 631 */ 632 int xmit_lock_owner; 633 void *priv; /* pointer to private data */ 634 int (*hard_start_xmit) (struct sk_buff *skb, 635 struct net_device *dev); 636 /* These may be needed for future network-power-down code. */ 637 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 638 639 int watchdog_timeo; /* used by dev_watchdog() */ 640 struct timer_list watchdog_timer; 641 642 /* 643 * refcnt is a very hot point, so align it on SMP 644 */ 645 /* Number of references to this device */ 646 atomic_t refcnt ____cacheline_aligned_in_smp; 647 648 /* delayed register/unregister */ 649 struct list_head todo_list; 650 /* device index hash chain */ 651 struct hlist_node index_hlist; 652 653 struct net_device *link_watch_next; 654 655 /* register/unregister state machine */ 656 enum { NETREG_UNINITIALIZED=0, 657 NETREG_REGISTERED, /* completed register_netdevice */ 658 NETREG_UNREGISTERING, /* called unregister_netdevice */ 659 NETREG_UNREGISTERED, /* completed unregister todo */ 660 NETREG_RELEASED, /* called free_netdev */ 661 } reg_state; 662 663 /* Called after device is detached from network. */ 664 void (*uninit)(struct net_device *dev); 665 /* Called after last user reference disappears. */ 666 void (*destructor)(struct net_device *dev); 667 668 /* Pointers to interface service routines. */ 669 int (*open)(struct net_device *dev); 670 int (*stop)(struct net_device *dev); 671 #define HAVE_NETDEV_POLL 672 #define HAVE_CHANGE_RX_FLAGS 673 void (*change_rx_flags)(struct net_device *dev, 674 int flags); 675 #define HAVE_SET_RX_MODE 676 void (*set_rx_mode)(struct net_device *dev); 677 #define HAVE_MULTICAST 678 void (*set_multicast_list)(struct net_device *dev); 679 #define HAVE_SET_MAC_ADDR 680 int (*set_mac_address)(struct net_device *dev, 681 void *addr); 682 #define HAVE_VALIDATE_ADDR 683 int (*validate_addr)(struct net_device *dev); 684 #define HAVE_PRIVATE_IOCTL 685 int (*do_ioctl)(struct net_device *dev, 686 struct ifreq *ifr, int cmd); 687 #define HAVE_SET_CONFIG 688 int (*set_config)(struct net_device *dev, 689 struct ifmap *map); 690 #define HAVE_CHANGE_MTU 691 int (*change_mtu)(struct net_device *dev, int new_mtu); 692 693 #define HAVE_TX_TIMEOUT 694 void (*tx_timeout) (struct net_device *dev); 695 696 void (*vlan_rx_register)(struct net_device *dev, 697 struct vlan_group *grp); 698 void (*vlan_rx_add_vid)(struct net_device *dev, 699 unsigned short vid); 700 void (*vlan_rx_kill_vid)(struct net_device *dev, 701 unsigned short vid); 702 703 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); 704 #ifdef CONFIG_NETPOLL 705 struct netpoll_info *npinfo; 706 #endif 707 #ifdef CONFIG_NET_POLL_CONTROLLER 708 void (*poll_controller)(struct net_device *dev); 709 #endif 710 711 /* Network namespace this network device is inside */ 712 struct net *nd_net; 713 714 /* bridge stuff */ 715 struct net_bridge_port *br_port; 716 /* macvlan */ 717 struct macvlan_port *macvlan_port; 718 719 /* class/net/name entry */ 720 struct device dev; 721 /* space for optional statistics and wireless sysfs groups */ 722 struct attribute_group *sysfs_groups[3]; 723 724 /* rtnetlink link ops */ 725 const struct rtnl_link_ops *rtnl_link_ops; 726 727 /* The TX queue control structures */ 728 unsigned int egress_subqueue_count; 729 struct net_device_subqueue egress_subqueue[1]; 730 }; 731 #define to_net_dev(d) container_of(d, struct net_device, dev) 732 733 #define NETDEV_ALIGN 32 734 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) 735 736 /** 737 * netdev_priv - access network device private data 738 * @dev: network device 739 * 740 * Get network device private data 741 */ 742 static inline void *netdev_priv(const struct net_device *dev) 743 { 744 return dev->priv; 745 } 746 747 /* Set the sysfs physical device reference for the network logical device 748 * if set prior to registration will cause a symlink during initialization. 749 */ 750 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 751 752 /** 753 * netif_napi_add - initialize a napi context 754 * @dev: network device 755 * @napi: napi context 756 * @poll: polling function 757 * @weight: default weight 758 * 759 * netif_napi_add() must be used to initialize a napi context prior to calling 760 * *any* of the other napi related functions. 761 */ 762 static inline void netif_napi_add(struct net_device *dev, 763 struct napi_struct *napi, 764 int (*poll)(struct napi_struct *, int), 765 int weight) 766 { 767 INIT_LIST_HEAD(&napi->poll_list); 768 napi->poll = poll; 769 napi->weight = weight; 770 #ifdef CONFIG_NETPOLL 771 napi->dev = dev; 772 list_add(&napi->dev_list, &dev->napi_list); 773 spin_lock_init(&napi->poll_lock); 774 napi->poll_owner = -1; 775 #endif 776 set_bit(NAPI_STATE_SCHED, &napi->state); 777 } 778 779 struct packet_type { 780 __be16 type; /* This is really htons(ether_type). */ 781 struct net_device *dev; /* NULL is wildcarded here */ 782 int (*func) (struct sk_buff *, 783 struct net_device *, 784 struct packet_type *, 785 struct net_device *); 786 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 787 int features); 788 int (*gso_send_check)(struct sk_buff *skb); 789 void *af_packet_priv; 790 struct list_head list; 791 }; 792 793 #include <linux/interrupt.h> 794 #include <linux/notifier.h> 795 796 extern rwlock_t dev_base_lock; /* Device list lock */ 797 798 799 #define for_each_netdev(net, d) \ 800 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 801 #define for_each_netdev_safe(net, d, n) \ 802 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 803 #define for_each_netdev_continue(net, d) \ 804 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 805 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 806 807 static inline struct net_device *next_net_device(struct net_device *dev) 808 { 809 struct list_head *lh; 810 struct net *net; 811 812 net = dev->nd_net; 813 lh = dev->dev_list.next; 814 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 815 } 816 817 static inline struct net_device *first_net_device(struct net *net) 818 { 819 return list_empty(&net->dev_base_head) ? NULL : 820 net_device_entry(net->dev_base_head.next); 821 } 822 823 extern int netdev_boot_setup_check(struct net_device *dev); 824 extern unsigned long netdev_boot_base(const char *prefix, int unit); 825 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 826 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 827 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 828 extern void dev_add_pack(struct packet_type *pt); 829 extern void dev_remove_pack(struct packet_type *pt); 830 extern void __dev_remove_pack(struct packet_type *pt); 831 832 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 833 unsigned short mask); 834 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 835 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 836 extern int dev_alloc_name(struct net_device *dev, const char *name); 837 extern int dev_open(struct net_device *dev); 838 extern int dev_close(struct net_device *dev); 839 extern int dev_queue_xmit(struct sk_buff *skb); 840 extern int register_netdevice(struct net_device *dev); 841 extern void unregister_netdevice(struct net_device *dev); 842 extern void free_netdev(struct net_device *dev); 843 extern void synchronize_net(void); 844 extern int register_netdevice_notifier(struct notifier_block *nb); 845 extern int unregister_netdevice_notifier(struct notifier_block *nb); 846 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 847 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 848 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 849 extern int dev_restart(struct net_device *dev); 850 #ifdef CONFIG_NETPOLL_TRAP 851 extern int netpoll_trap(void); 852 #endif 853 854 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 855 unsigned short type, 856 const void *daddr, const void *saddr, 857 unsigned len) 858 { 859 if (!dev->header_ops || !dev->header_ops->create) 860 return 0; 861 862 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 863 } 864 865 static inline int dev_parse_header(const struct sk_buff *skb, 866 unsigned char *haddr) 867 { 868 const struct net_device *dev = skb->dev; 869 870 if (!dev->header_ops || !dev->header_ops->parse) 871 return 0; 872 return dev->header_ops->parse(skb, haddr); 873 } 874 875 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 876 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 877 static inline int unregister_gifconf(unsigned int family) 878 { 879 return register_gifconf(family, NULL); 880 } 881 882 /* 883 * Incoming packets are placed on per-cpu queues so that 884 * no locking is needed. 885 */ 886 struct softnet_data 887 { 888 struct net_device *output_queue; 889 struct sk_buff_head input_pkt_queue; 890 struct list_head poll_list; 891 struct sk_buff *completion_queue; 892 893 struct napi_struct backlog; 894 #ifdef CONFIG_NET_DMA 895 struct dma_chan *net_dma; 896 #endif 897 }; 898 899 DECLARE_PER_CPU(struct softnet_data,softnet_data); 900 901 #define HAVE_NETIF_QUEUE 902 903 extern void __netif_schedule(struct net_device *dev); 904 905 static inline void netif_schedule(struct net_device *dev) 906 { 907 if (!test_bit(__LINK_STATE_XOFF, &dev->state)) 908 __netif_schedule(dev); 909 } 910 911 /** 912 * netif_start_queue - allow transmit 913 * @dev: network device 914 * 915 * Allow upper layers to call the device hard_start_xmit routine. 916 */ 917 static inline void netif_start_queue(struct net_device *dev) 918 { 919 clear_bit(__LINK_STATE_XOFF, &dev->state); 920 } 921 922 /** 923 * netif_wake_queue - restart transmit 924 * @dev: network device 925 * 926 * Allow upper layers to call the device hard_start_xmit routine. 927 * Used for flow control when transmit resources are available. 928 */ 929 static inline void netif_wake_queue(struct net_device *dev) 930 { 931 #ifdef CONFIG_NETPOLL_TRAP 932 if (netpoll_trap()) { 933 clear_bit(__LINK_STATE_XOFF, &dev->state); 934 return; 935 } 936 #endif 937 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) 938 __netif_schedule(dev); 939 } 940 941 /** 942 * netif_stop_queue - stop transmitted packets 943 * @dev: network device 944 * 945 * Stop upper layers calling the device hard_start_xmit routine. 946 * Used for flow control when transmit resources are unavailable. 947 */ 948 static inline void netif_stop_queue(struct net_device *dev) 949 { 950 set_bit(__LINK_STATE_XOFF, &dev->state); 951 } 952 953 /** 954 * netif_queue_stopped - test if transmit queue is flowblocked 955 * @dev: network device 956 * 957 * Test if transmit queue on device is currently unable to send. 958 */ 959 static inline int netif_queue_stopped(const struct net_device *dev) 960 { 961 return test_bit(__LINK_STATE_XOFF, &dev->state); 962 } 963 964 /** 965 * netif_running - test if up 966 * @dev: network device 967 * 968 * Test if the device has been brought up. 969 */ 970 static inline int netif_running(const struct net_device *dev) 971 { 972 return test_bit(__LINK_STATE_START, &dev->state); 973 } 974 975 /* 976 * Routines to manage the subqueues on a device. We only need start 977 * stop, and a check if it's stopped. All other device management is 978 * done at the overall netdevice level. 979 * Also test the device if we're multiqueue. 980 */ 981 982 /** 983 * netif_start_subqueue - allow sending packets on subqueue 984 * @dev: network device 985 * @queue_index: sub queue index 986 * 987 * Start individual transmit queue of a device with multiple transmit queues. 988 */ 989 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 990 { 991 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 992 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); 993 #endif 994 } 995 996 /** 997 * netif_stop_subqueue - stop sending packets on subqueue 998 * @dev: network device 999 * @queue_index: sub queue index 1000 * 1001 * Stop individual transmit queue of a device with multiple transmit queues. 1002 */ 1003 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1004 { 1005 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1006 #ifdef CONFIG_NETPOLL_TRAP 1007 if (netpoll_trap()) 1008 return; 1009 #endif 1010 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); 1011 #endif 1012 } 1013 1014 /** 1015 * netif_subqueue_stopped - test status of subqueue 1016 * @dev: network device 1017 * @queue_index: sub queue index 1018 * 1019 * Check individual transmit queue of a device with multiple transmit queues. 1020 */ 1021 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1022 u16 queue_index) 1023 { 1024 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1025 return test_bit(__LINK_STATE_XOFF, 1026 &dev->egress_subqueue[queue_index].state); 1027 #else 1028 return 0; 1029 #endif 1030 } 1031 1032 static inline int netif_subqueue_stopped(const struct net_device *dev, 1033 struct sk_buff *skb) 1034 { 1035 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1036 } 1037 1038 /** 1039 * netif_wake_subqueue - allow sending packets on subqueue 1040 * @dev: network device 1041 * @queue_index: sub queue index 1042 * 1043 * Resume individual transmit queue of a device with multiple transmit queues. 1044 */ 1045 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1046 { 1047 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1048 #ifdef CONFIG_NETPOLL_TRAP 1049 if (netpoll_trap()) 1050 return; 1051 #endif 1052 if (test_and_clear_bit(__LINK_STATE_XOFF, 1053 &dev->egress_subqueue[queue_index].state)) 1054 __netif_schedule(dev); 1055 #endif 1056 } 1057 1058 /** 1059 * netif_is_multiqueue - test if device has multiple transmit queues 1060 * @dev: network device 1061 * 1062 * Check if device has multiple transmit queues 1063 * Always falls if NETDEVICE_MULTIQUEUE is not configured 1064 */ 1065 static inline int netif_is_multiqueue(const struct net_device *dev) 1066 { 1067 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1068 return (!!(NETIF_F_MULTI_QUEUE & dev->features)); 1069 #else 1070 return 0; 1071 #endif 1072 } 1073 1074 /* Use this variant when it is known for sure that it 1075 * is executing from interrupt context. 1076 */ 1077 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1078 1079 /* Use this variant in places where it could be invoked 1080 * either from interrupt or non-interrupt context. 1081 */ 1082 extern void dev_kfree_skb_any(struct sk_buff *skb); 1083 1084 #define HAVE_NETIF_RX 1 1085 extern int netif_rx(struct sk_buff *skb); 1086 extern int netif_rx_ni(struct sk_buff *skb); 1087 #define HAVE_NETIF_RECEIVE_SKB 1 1088 extern int netif_receive_skb(struct sk_buff *skb); 1089 extern int dev_valid_name(const char *name); 1090 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1091 extern int dev_ethtool(struct net *net, struct ifreq *); 1092 extern unsigned dev_get_flags(const struct net_device *); 1093 extern int dev_change_flags(struct net_device *, unsigned); 1094 extern int dev_change_name(struct net_device *, char *); 1095 extern int dev_change_net_namespace(struct net_device *, 1096 struct net *, const char *); 1097 extern int dev_set_mtu(struct net_device *, int); 1098 extern int dev_set_mac_address(struct net_device *, 1099 struct sockaddr *); 1100 extern int dev_hard_start_xmit(struct sk_buff *skb, 1101 struct net_device *dev); 1102 1103 extern int netdev_budget; 1104 1105 /* Called by rtnetlink.c:rtnl_unlock() */ 1106 extern void netdev_run_todo(void); 1107 1108 /** 1109 * dev_put - release reference to device 1110 * @dev: network device 1111 * 1112 * Release reference to device to allow it to be freed. 1113 */ 1114 static inline void dev_put(struct net_device *dev) 1115 { 1116 atomic_dec(&dev->refcnt); 1117 } 1118 1119 /** 1120 * dev_hold - get reference to device 1121 * @dev: network device 1122 * 1123 * Hold reference to device to keep it from being freed. 1124 */ 1125 static inline void dev_hold(struct net_device *dev) 1126 { 1127 atomic_inc(&dev->refcnt); 1128 } 1129 1130 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1131 * and _off may be called from IRQ context, but it is caller 1132 * who is responsible for serialization of these calls. 1133 * 1134 * The name carrier is inappropriate, these functions should really be 1135 * called netif_lowerlayer_*() because they represent the state of any 1136 * kind of lower layer not just hardware media. 1137 */ 1138 1139 extern void linkwatch_fire_event(struct net_device *dev); 1140 1141 /** 1142 * netif_carrier_ok - test if carrier present 1143 * @dev: network device 1144 * 1145 * Check if carrier is present on device 1146 */ 1147 static inline int netif_carrier_ok(const struct net_device *dev) 1148 { 1149 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1150 } 1151 1152 extern void __netdev_watchdog_up(struct net_device *dev); 1153 1154 extern void netif_carrier_on(struct net_device *dev); 1155 1156 extern void netif_carrier_off(struct net_device *dev); 1157 1158 /** 1159 * netif_dormant_on - mark device as dormant. 1160 * @dev: network device 1161 * 1162 * Mark device as dormant (as per RFC2863). 1163 * 1164 * The dormant state indicates that the relevant interface is not 1165 * actually in a condition to pass packets (i.e., it is not 'up') but is 1166 * in a "pending" state, waiting for some external event. For "on- 1167 * demand" interfaces, this new state identifies the situation where the 1168 * interface is waiting for events to place it in the up state. 1169 * 1170 */ 1171 static inline void netif_dormant_on(struct net_device *dev) 1172 { 1173 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1174 linkwatch_fire_event(dev); 1175 } 1176 1177 /** 1178 * netif_dormant_off - set device as not dormant. 1179 * @dev: network device 1180 * 1181 * Device is not in dormant state. 1182 */ 1183 static inline void netif_dormant_off(struct net_device *dev) 1184 { 1185 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1186 linkwatch_fire_event(dev); 1187 } 1188 1189 /** 1190 * netif_dormant - test if carrier present 1191 * @dev: network device 1192 * 1193 * Check if carrier is present on device 1194 */ 1195 static inline int netif_dormant(const struct net_device *dev) 1196 { 1197 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1198 } 1199 1200 1201 /** 1202 * netif_oper_up - test if device is operational 1203 * @dev: network device 1204 * 1205 * Check if carrier is operational 1206 */ 1207 static inline int netif_oper_up(const struct net_device *dev) { 1208 return (dev->operstate == IF_OPER_UP || 1209 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1210 } 1211 1212 /** 1213 * netif_device_present - is device available or removed 1214 * @dev: network device 1215 * 1216 * Check if device has not been removed from system. 1217 */ 1218 static inline int netif_device_present(struct net_device *dev) 1219 { 1220 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1221 } 1222 1223 extern void netif_device_detach(struct net_device *dev); 1224 1225 extern void netif_device_attach(struct net_device *dev); 1226 1227 /* 1228 * Network interface message level settings 1229 */ 1230 #define HAVE_NETIF_MSG 1 1231 1232 enum { 1233 NETIF_MSG_DRV = 0x0001, 1234 NETIF_MSG_PROBE = 0x0002, 1235 NETIF_MSG_LINK = 0x0004, 1236 NETIF_MSG_TIMER = 0x0008, 1237 NETIF_MSG_IFDOWN = 0x0010, 1238 NETIF_MSG_IFUP = 0x0020, 1239 NETIF_MSG_RX_ERR = 0x0040, 1240 NETIF_MSG_TX_ERR = 0x0080, 1241 NETIF_MSG_TX_QUEUED = 0x0100, 1242 NETIF_MSG_INTR = 0x0200, 1243 NETIF_MSG_TX_DONE = 0x0400, 1244 NETIF_MSG_RX_STATUS = 0x0800, 1245 NETIF_MSG_PKTDATA = 0x1000, 1246 NETIF_MSG_HW = 0x2000, 1247 NETIF_MSG_WOL = 0x4000, 1248 }; 1249 1250 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1251 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1252 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1253 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1254 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1255 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1256 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1257 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1258 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1259 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1260 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1261 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1262 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1263 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1264 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1265 1266 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1267 { 1268 /* use default */ 1269 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1270 return default_msg_enable_bits; 1271 if (debug_value == 0) /* no output */ 1272 return 0; 1273 /* set low N bits */ 1274 return (1 << debug_value) - 1; 1275 } 1276 1277 /* Test if receive needs to be scheduled but only if up */ 1278 static inline int netif_rx_schedule_prep(struct net_device *dev, 1279 struct napi_struct *napi) 1280 { 1281 return napi_schedule_prep(napi); 1282 } 1283 1284 /* Add interface to tail of rx poll list. This assumes that _prep has 1285 * already been called and returned 1. 1286 */ 1287 static inline void __netif_rx_schedule(struct net_device *dev, 1288 struct napi_struct *napi) 1289 { 1290 __napi_schedule(napi); 1291 } 1292 1293 /* Try to reschedule poll. Called by irq handler. */ 1294 1295 static inline void netif_rx_schedule(struct net_device *dev, 1296 struct napi_struct *napi) 1297 { 1298 if (netif_rx_schedule_prep(dev, napi)) 1299 __netif_rx_schedule(dev, napi); 1300 } 1301 1302 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ 1303 static inline int netif_rx_reschedule(struct net_device *dev, 1304 struct napi_struct *napi) 1305 { 1306 if (napi_schedule_prep(napi)) { 1307 __netif_rx_schedule(dev, napi); 1308 return 1; 1309 } 1310 return 0; 1311 } 1312 1313 /* same as netif_rx_complete, except that local_irq_save(flags) 1314 * has already been issued 1315 */ 1316 static inline void __netif_rx_complete(struct net_device *dev, 1317 struct napi_struct *napi) 1318 { 1319 __napi_complete(napi); 1320 } 1321 1322 /* Remove interface from poll list: it must be in the poll list 1323 * on current cpu. This primitive is called by dev->poll(), when 1324 * it completes the work. The device cannot be out of poll list at this 1325 * moment, it is BUG(). 1326 */ 1327 static inline void netif_rx_complete(struct net_device *dev, 1328 struct napi_struct *napi) 1329 { 1330 unsigned long flags; 1331 1332 local_irq_save(flags); 1333 __netif_rx_complete(dev, napi); 1334 local_irq_restore(flags); 1335 } 1336 1337 /** 1338 * netif_tx_lock - grab network device transmit lock 1339 * @dev: network device 1340 * @cpu: cpu number of lock owner 1341 * 1342 * Get network device transmit lock 1343 */ 1344 static inline void __netif_tx_lock(struct net_device *dev, int cpu) 1345 { 1346 spin_lock(&dev->_xmit_lock); 1347 dev->xmit_lock_owner = cpu; 1348 } 1349 1350 static inline void netif_tx_lock(struct net_device *dev) 1351 { 1352 __netif_tx_lock(dev, smp_processor_id()); 1353 } 1354 1355 static inline void netif_tx_lock_bh(struct net_device *dev) 1356 { 1357 spin_lock_bh(&dev->_xmit_lock); 1358 dev->xmit_lock_owner = smp_processor_id(); 1359 } 1360 1361 static inline int netif_tx_trylock(struct net_device *dev) 1362 { 1363 int ok = spin_trylock(&dev->_xmit_lock); 1364 if (likely(ok)) 1365 dev->xmit_lock_owner = smp_processor_id(); 1366 return ok; 1367 } 1368 1369 static inline void netif_tx_unlock(struct net_device *dev) 1370 { 1371 dev->xmit_lock_owner = -1; 1372 spin_unlock(&dev->_xmit_lock); 1373 } 1374 1375 static inline void netif_tx_unlock_bh(struct net_device *dev) 1376 { 1377 dev->xmit_lock_owner = -1; 1378 spin_unlock_bh(&dev->_xmit_lock); 1379 } 1380 1381 #define HARD_TX_LOCK(dev, cpu) { \ 1382 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1383 __netif_tx_lock(dev, cpu); \ 1384 } \ 1385 } 1386 1387 #define HARD_TX_UNLOCK(dev) { \ 1388 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1389 netif_tx_unlock(dev); \ 1390 } \ 1391 } 1392 1393 static inline void netif_tx_disable(struct net_device *dev) 1394 { 1395 netif_tx_lock_bh(dev); 1396 netif_stop_queue(dev); 1397 netif_tx_unlock_bh(dev); 1398 } 1399 1400 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1401 1402 extern void ether_setup(struct net_device *dev); 1403 1404 /* Support for loadable net-drivers */ 1405 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1406 void (*setup)(struct net_device *), 1407 unsigned int queue_count); 1408 #define alloc_netdev(sizeof_priv, name, setup) \ 1409 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1410 extern int register_netdev(struct net_device *dev); 1411 extern void unregister_netdev(struct net_device *dev); 1412 /* Functions used for secondary unicast and multicast support */ 1413 extern void dev_set_rx_mode(struct net_device *dev); 1414 extern void __dev_set_rx_mode(struct net_device *dev); 1415 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); 1416 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); 1417 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1418 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1419 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1420 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1421 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1422 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1423 extern void dev_set_promiscuity(struct net_device *dev, int inc); 1424 extern void dev_set_allmulti(struct net_device *dev, int inc); 1425 extern void netdev_state_change(struct net_device *dev); 1426 extern void netdev_features_change(struct net_device *dev); 1427 /* Load a device via the kmod */ 1428 extern void dev_load(struct net *net, const char *name); 1429 extern void dev_mcast_init(void); 1430 extern int netdev_max_backlog; 1431 extern int weight_p; 1432 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1433 extern int skb_checksum_help(struct sk_buff *skb); 1434 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1435 #ifdef CONFIG_BUG 1436 extern void netdev_rx_csum_fault(struct net_device *dev); 1437 #else 1438 static inline void netdev_rx_csum_fault(struct net_device *dev) 1439 { 1440 } 1441 #endif 1442 /* rx skb timestamps */ 1443 extern void net_enable_timestamp(void); 1444 extern void net_disable_timestamp(void); 1445 1446 #ifdef CONFIG_PROC_FS 1447 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1448 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1449 extern void dev_seq_stop(struct seq_file *seq, void *v); 1450 #endif 1451 1452 extern void linkwatch_run_queue(void); 1453 1454 extern int netdev_compute_features(unsigned long all, unsigned long one); 1455 1456 static inline int net_gso_ok(int features, int gso_type) 1457 { 1458 int feature = gso_type << NETIF_F_GSO_SHIFT; 1459 return (features & feature) == feature; 1460 } 1461 1462 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1463 { 1464 return net_gso_ok(features, skb_shinfo(skb)->gso_type); 1465 } 1466 1467 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1468 { 1469 return skb_is_gso(skb) && 1470 (!skb_gso_ok(skb, dev->features) || 1471 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1472 } 1473 1474 /* On bonding slaves other than the currently active slave, suppress 1475 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1476 * ARP on active-backup slaves with arp_validate enabled. 1477 */ 1478 static inline int skb_bond_should_drop(struct sk_buff *skb) 1479 { 1480 struct net_device *dev = skb->dev; 1481 struct net_device *master = dev->master; 1482 1483 if (master && 1484 (dev->priv_flags & IFF_SLAVE_INACTIVE)) { 1485 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1486 skb->protocol == __constant_htons(ETH_P_ARP)) 1487 return 0; 1488 1489 if (master->priv_flags & IFF_MASTER_ALB) { 1490 if (skb->pkt_type != PACKET_BROADCAST && 1491 skb->pkt_type != PACKET_MULTICAST) 1492 return 0; 1493 } 1494 if (master->priv_flags & IFF_MASTER_8023AD && 1495 skb->protocol == __constant_htons(ETH_P_SLOW)) 1496 return 0; 1497 1498 return 1; 1499 } 1500 return 0; 1501 } 1502 1503 #endif /* __KERNEL__ */ 1504 1505 #endif /* _LINUX_DEV_H */ 1506