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 }; 323 324 extern void FASTCALL(__napi_schedule(struct napi_struct *n)); 325 326 /** 327 * napi_schedule_prep - check if napi can be scheduled 328 * @n: napi context 329 * 330 * Test if NAPI routine is already running, and if not mark 331 * it as running. This is used as a condition variable 332 * insure only one NAPI poll instance runs 333 */ 334 static inline int napi_schedule_prep(struct napi_struct *n) 335 { 336 return !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 337 } 338 339 /** 340 * napi_schedule - schedule NAPI poll 341 * @n: napi context 342 * 343 * Schedule NAPI poll routine to be called if it is not already 344 * running. 345 */ 346 static inline void napi_schedule(struct napi_struct *n) 347 { 348 if (napi_schedule_prep(n)) 349 __napi_schedule(n); 350 } 351 352 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 353 static inline int napi_reschedule(struct napi_struct *napi) 354 { 355 if (napi_schedule_prep(napi)) { 356 __napi_schedule(napi); 357 return 1; 358 } 359 return 0; 360 } 361 362 /** 363 * napi_complete - NAPI processing complete 364 * @n: napi context 365 * 366 * Mark NAPI processing as complete. 367 */ 368 static inline void __napi_complete(struct napi_struct *n) 369 { 370 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 371 list_del(&n->poll_list); 372 smp_mb__before_clear_bit(); 373 clear_bit(NAPI_STATE_SCHED, &n->state); 374 } 375 376 static inline void napi_complete(struct napi_struct *n) 377 { 378 local_irq_disable(); 379 __napi_complete(n); 380 local_irq_enable(); 381 } 382 383 /** 384 * napi_disable - prevent NAPI from scheduling 385 * @n: napi context 386 * 387 * Stop NAPI from being scheduled on this context. 388 * Waits till any outstanding processing completes. 389 */ 390 static inline void napi_disable(struct napi_struct *n) 391 { 392 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 393 msleep_interruptible(1); 394 } 395 396 /** 397 * napi_enable - enable NAPI scheduling 398 * @n: napi context 399 * 400 * Resume NAPI from being scheduled on this context. 401 * Must be paired with napi_disable. 402 */ 403 static inline void napi_enable(struct napi_struct *n) 404 { 405 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 406 smp_mb__before_clear_bit(); 407 clear_bit(NAPI_STATE_SCHED, &n->state); 408 } 409 410 /* 411 * The DEVICE structure. 412 * Actually, this whole structure is a big mistake. It mixes I/O 413 * data with strictly "high-level" data, and it has to know about 414 * almost every data structure used in the INET module. 415 * 416 * FIXME: cleanup struct net_device such that network protocol info 417 * moves out. 418 */ 419 420 struct net_device 421 { 422 423 /* 424 * This is the first field of the "visible" part of this structure 425 * (i.e. as seen by users in the "Space.c" file). It is the name 426 * the interface. 427 */ 428 char name[IFNAMSIZ]; 429 /* device name hash chain */ 430 struct hlist_node name_hlist; 431 432 /* 433 * I/O specific fields 434 * FIXME: Merge these and struct ifmap into one 435 */ 436 unsigned long mem_end; /* shared mem end */ 437 unsigned long mem_start; /* shared mem start */ 438 unsigned long base_addr; /* device I/O address */ 439 unsigned int irq; /* device IRQ number */ 440 441 /* 442 * Some hardware also needs these fields, but they are not 443 * part of the usual set specified in Space.c. 444 */ 445 446 unsigned char if_port; /* Selectable AUI, TP,..*/ 447 unsigned char dma; /* DMA channel */ 448 449 unsigned long state; 450 451 struct list_head dev_list; 452 #ifdef CONFIG_NETPOLL 453 struct list_head napi_list; 454 #endif 455 456 /* The device initialization function. Called only once. */ 457 int (*init)(struct net_device *dev); 458 459 /* ------- Fields preinitialized in Space.c finish here ------- */ 460 461 /* Net device features */ 462 unsigned long features; 463 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 464 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 465 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 466 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 467 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 468 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 469 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 470 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 471 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 472 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 473 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 474 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 475 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 476 /* do not use LLTX in new drivers */ 477 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 478 #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ 479 #define NETIF_F_LRO 32768 /* large receive offload */ 480 481 /* Segmentation offload features */ 482 #define NETIF_F_GSO_SHIFT 16 483 #define NETIF_F_GSO_MASK 0xffff0000 484 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 485 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 486 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 487 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 488 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 489 490 /* List of features with software fallbacks. */ 491 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 492 493 494 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 495 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 496 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 497 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 498 499 struct net_device *next_sched; 500 501 /* Interface index. Unique device identifier */ 502 int ifindex; 503 int iflink; 504 505 506 struct net_device_stats* (*get_stats)(struct net_device *dev); 507 struct net_device_stats stats; 508 509 #ifdef CONFIG_WIRELESS_EXT 510 /* List of functions to handle Wireless Extensions (instead of ioctl). 511 * See <net/iw_handler.h> for details. Jean II */ 512 const struct iw_handler_def * wireless_handlers; 513 /* Instance data managed by the core of Wireless Extensions. */ 514 struct iw_public_data * wireless_data; 515 #endif 516 const struct ethtool_ops *ethtool_ops; 517 518 /* Hardware header description */ 519 const struct header_ops *header_ops; 520 521 /* 522 * This marks the end of the "visible" part of the structure. All 523 * fields hereafter are internal to the system, and may change at 524 * will (read: may be cleaned up at will). 525 */ 526 527 528 unsigned int flags; /* interface flags (a la BSD) */ 529 unsigned short gflags; 530 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 531 unsigned short padded; /* How much padding added by alloc_netdev() */ 532 533 unsigned char operstate; /* RFC2863 operstate */ 534 unsigned char link_mode; /* mapping policy to operstate */ 535 536 unsigned mtu; /* interface MTU value */ 537 unsigned short type; /* interface hardware type */ 538 unsigned short hard_header_len; /* hardware hdr length */ 539 540 struct net_device *master; /* Pointer to master device of a group, 541 * which this device is member of. 542 */ 543 544 /* Interface address info. */ 545 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 546 unsigned char addr_len; /* hardware address length */ 547 unsigned short dev_id; /* for shared network cards */ 548 549 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ 550 int uc_count; /* Number of installed ucasts */ 551 int uc_promisc; 552 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 553 int mc_count; /* Number of installed mcasts */ 554 int promiscuity; 555 int allmulti; 556 557 558 /* Protocol specific pointers */ 559 560 void *atalk_ptr; /* AppleTalk link */ 561 void *ip_ptr; /* IPv4 specific data */ 562 void *dn_ptr; /* DECnet specific data */ 563 void *ip6_ptr; /* IPv6 specific data */ 564 void *ec_ptr; /* Econet specific data */ 565 void *ax25_ptr; /* AX.25 specific data */ 566 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 567 assign before registering */ 568 569 /* 570 * Cache line mostly used on receive path (including eth_type_trans()) 571 */ 572 unsigned long last_rx; /* Time of last Rx */ 573 /* Interface address info used in eth_type_trans() */ 574 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast 575 because most packets are unicast) */ 576 577 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 578 579 /* 580 * Cache line mostly used on queue transmit path (qdisc) 581 */ 582 /* device queue lock */ 583 spinlock_t queue_lock ____cacheline_aligned_in_smp; 584 struct Qdisc *qdisc; 585 struct Qdisc *qdisc_sleeping; 586 struct list_head qdisc_list; 587 unsigned long tx_queue_len; /* Max frames per queue allowed */ 588 589 /* Partially transmitted GSO packet. */ 590 struct sk_buff *gso_skb; 591 592 /* ingress path synchronizer */ 593 spinlock_t ingress_lock; 594 struct Qdisc *qdisc_ingress; 595 596 /* 597 * One part is mostly used on xmit path (device) 598 */ 599 /* hard_start_xmit synchronizer */ 600 spinlock_t _xmit_lock ____cacheline_aligned_in_smp; 601 /* cpu id of processor entered to hard_start_xmit or -1, 602 if nobody entered there. 603 */ 604 int xmit_lock_owner; 605 void *priv; /* pointer to private data */ 606 int (*hard_start_xmit) (struct sk_buff *skb, 607 struct net_device *dev); 608 /* These may be needed for future network-power-down code. */ 609 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 610 611 int watchdog_timeo; /* used by dev_watchdog() */ 612 struct timer_list watchdog_timer; 613 614 /* 615 * refcnt is a very hot point, so align it on SMP 616 */ 617 /* Number of references to this device */ 618 atomic_t refcnt ____cacheline_aligned_in_smp; 619 620 /* delayed register/unregister */ 621 struct list_head todo_list; 622 /* device index hash chain */ 623 struct hlist_node index_hlist; 624 625 struct net_device *link_watch_next; 626 627 /* register/unregister state machine */ 628 enum { NETREG_UNINITIALIZED=0, 629 NETREG_REGISTERED, /* completed register_netdevice */ 630 NETREG_UNREGISTERING, /* called unregister_netdevice */ 631 NETREG_UNREGISTERED, /* completed unregister todo */ 632 NETREG_RELEASED, /* called free_netdev */ 633 } reg_state; 634 635 /* Called after device is detached from network. */ 636 void (*uninit)(struct net_device *dev); 637 /* Called after last user reference disappears. */ 638 void (*destructor)(struct net_device *dev); 639 640 /* Pointers to interface service routines. */ 641 int (*open)(struct net_device *dev); 642 int (*stop)(struct net_device *dev); 643 #define HAVE_NETDEV_POLL 644 #define HAVE_CHANGE_RX_FLAGS 645 void (*change_rx_flags)(struct net_device *dev, 646 int flags); 647 #define HAVE_SET_RX_MODE 648 void (*set_rx_mode)(struct net_device *dev); 649 #define HAVE_MULTICAST 650 void (*set_multicast_list)(struct net_device *dev); 651 #define HAVE_SET_MAC_ADDR 652 int (*set_mac_address)(struct net_device *dev, 653 void *addr); 654 #define HAVE_PRIVATE_IOCTL 655 int (*do_ioctl)(struct net_device *dev, 656 struct ifreq *ifr, int cmd); 657 #define HAVE_SET_CONFIG 658 int (*set_config)(struct net_device *dev, 659 struct ifmap *map); 660 #define HAVE_CHANGE_MTU 661 int (*change_mtu)(struct net_device *dev, int new_mtu); 662 663 #define HAVE_TX_TIMEOUT 664 void (*tx_timeout) (struct net_device *dev); 665 666 void (*vlan_rx_register)(struct net_device *dev, 667 struct vlan_group *grp); 668 void (*vlan_rx_add_vid)(struct net_device *dev, 669 unsigned short vid); 670 void (*vlan_rx_kill_vid)(struct net_device *dev, 671 unsigned short vid); 672 673 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); 674 #ifdef CONFIG_NETPOLL 675 struct netpoll_info *npinfo; 676 #endif 677 #ifdef CONFIG_NET_POLL_CONTROLLER 678 void (*poll_controller)(struct net_device *dev); 679 #endif 680 681 /* Network namespace this network device is inside */ 682 struct net *nd_net; 683 684 /* bridge stuff */ 685 struct net_bridge_port *br_port; 686 /* macvlan */ 687 struct macvlan_port *macvlan_port; 688 689 /* class/net/name entry */ 690 struct device dev; 691 /* space for optional statistics and wireless sysfs groups */ 692 struct attribute_group *sysfs_groups[3]; 693 694 /* rtnetlink link ops */ 695 const struct rtnl_link_ops *rtnl_link_ops; 696 697 /* The TX queue control structures */ 698 unsigned int egress_subqueue_count; 699 struct net_device_subqueue egress_subqueue[1]; 700 }; 701 #define to_net_dev(d) container_of(d, struct net_device, dev) 702 703 #define NETDEV_ALIGN 32 704 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) 705 706 /** 707 * netdev_priv - access network device private data 708 * @dev: network device 709 * 710 * Get network device private data 711 */ 712 static inline void *netdev_priv(const struct net_device *dev) 713 { 714 return dev->priv; 715 } 716 717 /* Set the sysfs physical device reference for the network logical device 718 * if set prior to registration will cause a symlink during initialization. 719 */ 720 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 721 722 static inline void netif_napi_add(struct net_device *dev, 723 struct napi_struct *napi, 724 int (*poll)(struct napi_struct *, int), 725 int weight) 726 { 727 INIT_LIST_HEAD(&napi->poll_list); 728 napi->poll = poll; 729 napi->weight = weight; 730 #ifdef CONFIG_NETPOLL 731 napi->dev = dev; 732 list_add(&napi->dev_list, &dev->napi_list); 733 spin_lock_init(&napi->poll_lock); 734 napi->poll_owner = -1; 735 #endif 736 set_bit(NAPI_STATE_SCHED, &napi->state); 737 } 738 739 struct packet_type { 740 __be16 type; /* This is really htons(ether_type). */ 741 struct net_device *dev; /* NULL is wildcarded here */ 742 int (*func) (struct sk_buff *, 743 struct net_device *, 744 struct packet_type *, 745 struct net_device *); 746 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 747 int features); 748 int (*gso_send_check)(struct sk_buff *skb); 749 void *af_packet_priv; 750 struct list_head list; 751 }; 752 753 #include <linux/interrupt.h> 754 #include <linux/notifier.h> 755 756 extern rwlock_t dev_base_lock; /* Device list lock */ 757 758 759 #define for_each_netdev(net, d) \ 760 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 761 #define for_each_netdev_safe(net, d, n) \ 762 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 763 #define for_each_netdev_continue(net, d) \ 764 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 765 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 766 767 static inline struct net_device *next_net_device(struct net_device *dev) 768 { 769 struct list_head *lh; 770 struct net *net; 771 772 net = dev->nd_net; 773 lh = dev->dev_list.next; 774 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 775 } 776 777 static inline struct net_device *first_net_device(struct net *net) 778 { 779 return list_empty(&net->dev_base_head) ? NULL : 780 net_device_entry(net->dev_base_head.next); 781 } 782 783 extern int netdev_boot_setup_check(struct net_device *dev); 784 extern unsigned long netdev_boot_base(const char *prefix, int unit); 785 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 786 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 787 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 788 extern void dev_add_pack(struct packet_type *pt); 789 extern void dev_remove_pack(struct packet_type *pt); 790 extern void __dev_remove_pack(struct packet_type *pt); 791 792 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 793 unsigned short mask); 794 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 795 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 796 extern int dev_alloc_name(struct net_device *dev, const char *name); 797 extern int dev_open(struct net_device *dev); 798 extern int dev_close(struct net_device *dev); 799 extern int dev_queue_xmit(struct sk_buff *skb); 800 extern int register_netdevice(struct net_device *dev); 801 extern void unregister_netdevice(struct net_device *dev); 802 extern void free_netdev(struct net_device *dev); 803 extern void synchronize_net(void); 804 extern int register_netdevice_notifier(struct notifier_block *nb); 805 extern int unregister_netdevice_notifier(struct notifier_block *nb); 806 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 807 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 808 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 809 extern int dev_restart(struct net_device *dev); 810 #ifdef CONFIG_NETPOLL_TRAP 811 extern int netpoll_trap(void); 812 #endif 813 814 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 815 unsigned short type, 816 const void *daddr, const void *saddr, 817 unsigned len) 818 { 819 if (!dev->header_ops) 820 return 0; 821 822 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 823 } 824 825 static inline int dev_parse_header(const struct sk_buff *skb, 826 unsigned char *haddr) 827 { 828 const struct net_device *dev = skb->dev; 829 830 if (!dev->header_ops->parse) 831 return 0; 832 return dev->header_ops->parse(skb, haddr); 833 } 834 835 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 836 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 837 static inline int unregister_gifconf(unsigned int family) 838 { 839 return register_gifconf(family, NULL); 840 } 841 842 /* 843 * Incoming packets are placed on per-cpu queues so that 844 * no locking is needed. 845 */ 846 struct softnet_data 847 { 848 struct net_device *output_queue; 849 struct sk_buff_head input_pkt_queue; 850 struct list_head poll_list; 851 struct sk_buff *completion_queue; 852 853 struct napi_struct backlog; 854 #ifdef CONFIG_NET_DMA 855 struct dma_chan *net_dma; 856 #endif 857 }; 858 859 DECLARE_PER_CPU(struct softnet_data,softnet_data); 860 861 #define HAVE_NETIF_QUEUE 862 863 extern void __netif_schedule(struct net_device *dev); 864 865 static inline void netif_schedule(struct net_device *dev) 866 { 867 if (!test_bit(__LINK_STATE_XOFF, &dev->state)) 868 __netif_schedule(dev); 869 } 870 871 /** 872 * netif_start_queue - allow transmit 873 * @dev: network device 874 * 875 * Allow upper layers to call the device hard_start_xmit routine. 876 */ 877 static inline void netif_start_queue(struct net_device *dev) 878 { 879 clear_bit(__LINK_STATE_XOFF, &dev->state); 880 } 881 882 /** 883 * netif_wake_queue - restart transmit 884 * @dev: network device 885 * 886 * Allow upper layers to call the device hard_start_xmit routine. 887 * Used for flow control when transmit resources are available. 888 */ 889 static inline void netif_wake_queue(struct net_device *dev) 890 { 891 #ifdef CONFIG_NETPOLL_TRAP 892 if (netpoll_trap()) { 893 clear_bit(__LINK_STATE_XOFF, &dev->state); 894 return; 895 } 896 #endif 897 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) 898 __netif_schedule(dev); 899 } 900 901 /** 902 * netif_stop_queue - stop transmitted packets 903 * @dev: network device 904 * 905 * Stop upper layers calling the device hard_start_xmit routine. 906 * Used for flow control when transmit resources are unavailable. 907 */ 908 static inline void netif_stop_queue(struct net_device *dev) 909 { 910 set_bit(__LINK_STATE_XOFF, &dev->state); 911 } 912 913 /** 914 * netif_queue_stopped - test if transmit queue is flowblocked 915 * @dev: network device 916 * 917 * Test if transmit queue on device is currently unable to send. 918 */ 919 static inline int netif_queue_stopped(const struct net_device *dev) 920 { 921 return test_bit(__LINK_STATE_XOFF, &dev->state); 922 } 923 924 /** 925 * netif_running - test if up 926 * @dev: network device 927 * 928 * Test if the device has been brought up. 929 */ 930 static inline int netif_running(const struct net_device *dev) 931 { 932 return test_bit(__LINK_STATE_START, &dev->state); 933 } 934 935 /* 936 * Routines to manage the subqueues on a device. We only need start 937 * stop, and a check if it's stopped. All other device management is 938 * done at the overall netdevice level. 939 * Also test the device if we're multiqueue. 940 */ 941 942 /** 943 * netif_start_subqueue - allow sending packets on subqueue 944 * @dev: network device 945 * @queue_index: sub queue index 946 * 947 * Start individual transmit queue of a device with multiple transmit queues. 948 */ 949 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 950 { 951 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 952 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); 953 #endif 954 } 955 956 /** 957 * netif_stop_subqueue - stop sending packets on subqueue 958 * @dev: network device 959 * @queue_index: sub queue index 960 * 961 * Stop individual transmit queue of a device with multiple transmit queues. 962 */ 963 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 964 { 965 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 966 #ifdef CONFIG_NETPOLL_TRAP 967 if (netpoll_trap()) 968 return; 969 #endif 970 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); 971 #endif 972 } 973 974 /** 975 * netif_subqueue_stopped - test status of subqueue 976 * @dev: network device 977 * @queue_index: sub queue index 978 * 979 * Check individual transmit queue of a device with multiple transmit queues. 980 */ 981 static inline int netif_subqueue_stopped(const struct net_device *dev, 982 u16 queue_index) 983 { 984 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 985 return test_bit(__LINK_STATE_XOFF, 986 &dev->egress_subqueue[queue_index].state); 987 #else 988 return 0; 989 #endif 990 } 991 992 993 /** 994 * netif_wake_subqueue - allow sending packets on subqueue 995 * @dev: network device 996 * @queue_index: sub queue index 997 * 998 * Resume individual transmit queue of a device with multiple transmit queues. 999 */ 1000 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1001 { 1002 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1003 #ifdef CONFIG_NETPOLL_TRAP 1004 if (netpoll_trap()) 1005 return; 1006 #endif 1007 if (test_and_clear_bit(__LINK_STATE_XOFF, 1008 &dev->egress_subqueue[queue_index].state)) 1009 __netif_schedule(dev); 1010 #endif 1011 } 1012 1013 /** 1014 * netif_is_multiqueue - test if device has multiple transmit queues 1015 * @dev: network device 1016 * 1017 * Check if device has multiple transmit queues 1018 * Always falls if NETDEVICE_MULTIQUEUE is not configured 1019 */ 1020 static inline int netif_is_multiqueue(const struct net_device *dev) 1021 { 1022 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1023 return (!!(NETIF_F_MULTI_QUEUE & dev->features)); 1024 #else 1025 return 0; 1026 #endif 1027 } 1028 1029 /* Use this variant when it is known for sure that it 1030 * is executing from interrupt context. 1031 */ 1032 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1033 1034 /* Use this variant in places where it could be invoked 1035 * either from interrupt or non-interrupt context. 1036 */ 1037 extern void dev_kfree_skb_any(struct sk_buff *skb); 1038 1039 #define HAVE_NETIF_RX 1 1040 extern int netif_rx(struct sk_buff *skb); 1041 extern int netif_rx_ni(struct sk_buff *skb); 1042 #define HAVE_NETIF_RECEIVE_SKB 1 1043 extern int netif_receive_skb(struct sk_buff *skb); 1044 extern int dev_valid_name(const char *name); 1045 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1046 extern int dev_ethtool(struct net *net, struct ifreq *); 1047 extern unsigned dev_get_flags(const struct net_device *); 1048 extern int dev_change_flags(struct net_device *, unsigned); 1049 extern int dev_change_name(struct net_device *, char *); 1050 extern int dev_change_net_namespace(struct net_device *, 1051 struct net *, const char *); 1052 extern int dev_set_mtu(struct net_device *, int); 1053 extern int dev_set_mac_address(struct net_device *, 1054 struct sockaddr *); 1055 extern int dev_hard_start_xmit(struct sk_buff *skb, 1056 struct net_device *dev); 1057 1058 extern int netdev_budget; 1059 1060 /* Called by rtnetlink.c:rtnl_unlock() */ 1061 extern void netdev_run_todo(void); 1062 1063 /** 1064 * dev_put - release reference to device 1065 * @dev: network device 1066 * 1067 * Release reference to device to allow it to be freed. 1068 */ 1069 static inline void dev_put(struct net_device *dev) 1070 { 1071 atomic_dec(&dev->refcnt); 1072 } 1073 1074 /** 1075 * dev_hold - get reference to device 1076 * @dev: network device 1077 * 1078 * Hold reference to device to keep it from being freed. 1079 */ 1080 static inline void dev_hold(struct net_device *dev) 1081 { 1082 atomic_inc(&dev->refcnt); 1083 } 1084 1085 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1086 * and _off may be called from IRQ context, but it is caller 1087 * who is responsible for serialization of these calls. 1088 * 1089 * The name carrier is inappropriate, these functions should really be 1090 * called netif_lowerlayer_*() because they represent the state of any 1091 * kind of lower layer not just hardware media. 1092 */ 1093 1094 extern void linkwatch_fire_event(struct net_device *dev); 1095 1096 /** 1097 * netif_carrier_ok - test if carrier present 1098 * @dev: network device 1099 * 1100 * Check if carrier is present on device 1101 */ 1102 static inline int netif_carrier_ok(const struct net_device *dev) 1103 { 1104 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1105 } 1106 1107 extern void __netdev_watchdog_up(struct net_device *dev); 1108 1109 extern void netif_carrier_on(struct net_device *dev); 1110 1111 extern void netif_carrier_off(struct net_device *dev); 1112 1113 /** 1114 * netif_dormant_on - mark device as dormant. 1115 * @dev: network device 1116 * 1117 * Mark device as dormant (as per RFC2863). 1118 * 1119 * The dormant state indicates that the relevant interface is not 1120 * actually in a condition to pass packets (i.e., it is not 'up') but is 1121 * in a "pending" state, waiting for some external event. For "on- 1122 * demand" interfaces, this new state identifies the situation where the 1123 * interface is waiting for events to place it in the up state. 1124 * 1125 */ 1126 static inline void netif_dormant_on(struct net_device *dev) 1127 { 1128 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1129 linkwatch_fire_event(dev); 1130 } 1131 1132 /** 1133 * netif_dormant_off - set device as not dormant. 1134 * @dev: network device 1135 * 1136 * Device is not in dormant state. 1137 */ 1138 static inline void netif_dormant_off(struct net_device *dev) 1139 { 1140 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1141 linkwatch_fire_event(dev); 1142 } 1143 1144 /** 1145 * netif_dormant - test if carrier present 1146 * @dev: network device 1147 * 1148 * Check if carrier is present on device 1149 */ 1150 static inline int netif_dormant(const struct net_device *dev) 1151 { 1152 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1153 } 1154 1155 1156 /** 1157 * netif_oper_up - test if device is operational 1158 * @dev: network device 1159 * 1160 * Check if carrier is operational 1161 */ 1162 static inline int netif_oper_up(const struct net_device *dev) { 1163 return (dev->operstate == IF_OPER_UP || 1164 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1165 } 1166 1167 /** 1168 * netif_device_present - is device available or removed 1169 * @dev: network device 1170 * 1171 * Check if device has not been removed from system. 1172 */ 1173 static inline int netif_device_present(struct net_device *dev) 1174 { 1175 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1176 } 1177 1178 extern void netif_device_detach(struct net_device *dev); 1179 1180 extern void netif_device_attach(struct net_device *dev); 1181 1182 /* 1183 * Network interface message level settings 1184 */ 1185 #define HAVE_NETIF_MSG 1 1186 1187 enum { 1188 NETIF_MSG_DRV = 0x0001, 1189 NETIF_MSG_PROBE = 0x0002, 1190 NETIF_MSG_LINK = 0x0004, 1191 NETIF_MSG_TIMER = 0x0008, 1192 NETIF_MSG_IFDOWN = 0x0010, 1193 NETIF_MSG_IFUP = 0x0020, 1194 NETIF_MSG_RX_ERR = 0x0040, 1195 NETIF_MSG_TX_ERR = 0x0080, 1196 NETIF_MSG_TX_QUEUED = 0x0100, 1197 NETIF_MSG_INTR = 0x0200, 1198 NETIF_MSG_TX_DONE = 0x0400, 1199 NETIF_MSG_RX_STATUS = 0x0800, 1200 NETIF_MSG_PKTDATA = 0x1000, 1201 NETIF_MSG_HW = 0x2000, 1202 NETIF_MSG_WOL = 0x4000, 1203 }; 1204 1205 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1206 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1207 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1208 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1209 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1210 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1211 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1212 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1213 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1214 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1215 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1216 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1217 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1218 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1219 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1220 1221 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1222 { 1223 /* use default */ 1224 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1225 return default_msg_enable_bits; 1226 if (debug_value == 0) /* no output */ 1227 return 0; 1228 /* set low N bits */ 1229 return (1 << debug_value) - 1; 1230 } 1231 1232 /* Test if receive needs to be scheduled but only if up */ 1233 static inline int netif_rx_schedule_prep(struct net_device *dev, 1234 struct napi_struct *napi) 1235 { 1236 return netif_running(dev) && napi_schedule_prep(napi); 1237 } 1238 1239 /* Add interface to tail of rx poll list. This assumes that _prep has 1240 * already been called and returned 1. 1241 */ 1242 static inline void __netif_rx_schedule(struct net_device *dev, 1243 struct napi_struct *napi) 1244 { 1245 dev_hold(dev); 1246 __napi_schedule(napi); 1247 } 1248 1249 /* Try to reschedule poll. Called by irq handler. */ 1250 1251 static inline void netif_rx_schedule(struct net_device *dev, 1252 struct napi_struct *napi) 1253 { 1254 if (netif_rx_schedule_prep(dev, napi)) 1255 __netif_rx_schedule(dev, napi); 1256 } 1257 1258 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ 1259 static inline int netif_rx_reschedule(struct net_device *dev, 1260 struct napi_struct *napi) 1261 { 1262 if (napi_schedule_prep(napi)) { 1263 __netif_rx_schedule(dev, napi); 1264 return 1; 1265 } 1266 return 0; 1267 } 1268 1269 /* same as netif_rx_complete, except that local_irq_save(flags) 1270 * has already been issued 1271 */ 1272 static inline void __netif_rx_complete(struct net_device *dev, 1273 struct napi_struct *napi) 1274 { 1275 __napi_complete(napi); 1276 dev_put(dev); 1277 } 1278 1279 /* Remove interface from poll list: it must be in the poll list 1280 * on current cpu. This primitive is called by dev->poll(), when 1281 * it completes the work. The device cannot be out of poll list at this 1282 * moment, it is BUG(). 1283 */ 1284 static inline void netif_rx_complete(struct net_device *dev, 1285 struct napi_struct *napi) 1286 { 1287 unsigned long flags; 1288 1289 local_irq_save(flags); 1290 __netif_rx_complete(dev, napi); 1291 local_irq_restore(flags); 1292 } 1293 1294 /** 1295 * netif_tx_lock - grab network device transmit lock 1296 * @dev: network device 1297 * @cpu: cpu number of lock owner 1298 * 1299 * Get network device transmit lock 1300 */ 1301 static inline void __netif_tx_lock(struct net_device *dev, int cpu) 1302 { 1303 spin_lock(&dev->_xmit_lock); 1304 dev->xmit_lock_owner = cpu; 1305 } 1306 1307 static inline void netif_tx_lock(struct net_device *dev) 1308 { 1309 __netif_tx_lock(dev, smp_processor_id()); 1310 } 1311 1312 static inline void netif_tx_lock_bh(struct net_device *dev) 1313 { 1314 spin_lock_bh(&dev->_xmit_lock); 1315 dev->xmit_lock_owner = smp_processor_id(); 1316 } 1317 1318 static inline int netif_tx_trylock(struct net_device *dev) 1319 { 1320 int ok = spin_trylock(&dev->_xmit_lock); 1321 if (likely(ok)) 1322 dev->xmit_lock_owner = smp_processor_id(); 1323 return ok; 1324 } 1325 1326 static inline void netif_tx_unlock(struct net_device *dev) 1327 { 1328 dev->xmit_lock_owner = -1; 1329 spin_unlock(&dev->_xmit_lock); 1330 } 1331 1332 static inline void netif_tx_unlock_bh(struct net_device *dev) 1333 { 1334 dev->xmit_lock_owner = -1; 1335 spin_unlock_bh(&dev->_xmit_lock); 1336 } 1337 1338 #define HARD_TX_LOCK(dev, cpu) { \ 1339 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1340 __netif_tx_lock(dev, cpu); \ 1341 } \ 1342 } 1343 1344 #define HARD_TX_UNLOCK(dev) { \ 1345 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1346 netif_tx_unlock(dev); \ 1347 } \ 1348 } 1349 1350 static inline void netif_tx_disable(struct net_device *dev) 1351 { 1352 netif_tx_lock_bh(dev); 1353 netif_stop_queue(dev); 1354 netif_tx_unlock_bh(dev); 1355 } 1356 1357 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1358 1359 extern void ether_setup(struct net_device *dev); 1360 1361 /* Support for loadable net-drivers */ 1362 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1363 void (*setup)(struct net_device *), 1364 unsigned int queue_count); 1365 #define alloc_netdev(sizeof_priv, name, setup) \ 1366 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1367 extern int register_netdev(struct net_device *dev); 1368 extern void unregister_netdev(struct net_device *dev); 1369 /* Functions used for secondary unicast and multicast support */ 1370 extern void dev_set_rx_mode(struct net_device *dev); 1371 extern void __dev_set_rx_mode(struct net_device *dev); 1372 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); 1373 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); 1374 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1375 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1376 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1377 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1378 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1379 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1380 extern void dev_set_promiscuity(struct net_device *dev, int inc); 1381 extern void dev_set_allmulti(struct net_device *dev, int inc); 1382 extern void netdev_state_change(struct net_device *dev); 1383 extern void netdev_features_change(struct net_device *dev); 1384 /* Load a device via the kmod */ 1385 extern void dev_load(struct net *net, const char *name); 1386 extern void dev_mcast_init(void); 1387 extern int netdev_max_backlog; 1388 extern int weight_p; 1389 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1390 extern int skb_checksum_help(struct sk_buff *skb); 1391 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1392 #ifdef CONFIG_BUG 1393 extern void netdev_rx_csum_fault(struct net_device *dev); 1394 #else 1395 static inline void netdev_rx_csum_fault(struct net_device *dev) 1396 { 1397 } 1398 #endif 1399 /* rx skb timestamps */ 1400 extern void net_enable_timestamp(void); 1401 extern void net_disable_timestamp(void); 1402 1403 #ifdef CONFIG_PROC_FS 1404 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1405 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1406 extern void dev_seq_stop(struct seq_file *seq, void *v); 1407 #endif 1408 1409 extern void linkwatch_run_queue(void); 1410 1411 extern int netdev_compute_features(unsigned long all, unsigned long one); 1412 1413 static inline int net_gso_ok(int features, int gso_type) 1414 { 1415 int feature = gso_type << NETIF_F_GSO_SHIFT; 1416 return (features & feature) == feature; 1417 } 1418 1419 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1420 { 1421 return net_gso_ok(features, skb_shinfo(skb)->gso_type); 1422 } 1423 1424 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1425 { 1426 return skb_is_gso(skb) && 1427 (!skb_gso_ok(skb, dev->features) || 1428 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1429 } 1430 1431 /* On bonding slaves other than the currently active slave, suppress 1432 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1433 * ARP on active-backup slaves with arp_validate enabled. 1434 */ 1435 static inline int skb_bond_should_drop(struct sk_buff *skb) 1436 { 1437 struct net_device *dev = skb->dev; 1438 struct net_device *master = dev->master; 1439 1440 if (master && 1441 (dev->priv_flags & IFF_SLAVE_INACTIVE)) { 1442 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1443 skb->protocol == __constant_htons(ETH_P_ARP)) 1444 return 0; 1445 1446 if (master->priv_flags & IFF_MASTER_ALB) { 1447 if (skb->pkt_type != PACKET_BROADCAST && 1448 skb->pkt_type != PACKET_MULTICAST) 1449 return 0; 1450 } 1451 if (master->priv_flags & IFF_MASTER_8023AD && 1452 skb->protocol == __constant_htons(ETH_P_SLOW)) 1453 return 0; 1454 1455 return 1; 1456 } 1457 return 0; 1458 } 1459 1460 #endif /* __KERNEL__ */ 1461 1462 #endif /* _LINUX_DEV_H */ 1463