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 __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 unsigned long flags; 387 388 local_irq_save(flags); 389 __napi_complete(n); 390 local_irq_restore(flags); 391 } 392 393 /** 394 * napi_disable - prevent NAPI from scheduling 395 * @n: napi context 396 * 397 * Stop NAPI from being scheduled on this context. 398 * Waits till any outstanding processing completes. 399 */ 400 static inline void napi_disable(struct napi_struct *n) 401 { 402 set_bit(NAPI_STATE_DISABLE, &n->state); 403 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 404 msleep(1); 405 clear_bit(NAPI_STATE_DISABLE, &n->state); 406 } 407 408 /** 409 * napi_enable - enable NAPI scheduling 410 * @n: napi context 411 * 412 * Resume NAPI from being scheduled on this context. 413 * Must be paired with napi_disable. 414 */ 415 static inline void napi_enable(struct napi_struct *n) 416 { 417 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 418 smp_mb__before_clear_bit(); 419 clear_bit(NAPI_STATE_SCHED, &n->state); 420 } 421 422 #ifdef CONFIG_SMP 423 /** 424 * napi_synchronize - wait until NAPI is not running 425 * @n: napi context 426 * 427 * Wait until NAPI is done being scheduled on this context. 428 * Waits till any outstanding processing completes but 429 * does not disable future activations. 430 */ 431 static inline void napi_synchronize(const struct napi_struct *n) 432 { 433 while (test_bit(NAPI_STATE_SCHED, &n->state)) 434 msleep(1); 435 } 436 #else 437 # define napi_synchronize(n) barrier() 438 #endif 439 440 /* 441 * The DEVICE structure. 442 * Actually, this whole structure is a big mistake. It mixes I/O 443 * data with strictly "high-level" data, and it has to know about 444 * almost every data structure used in the INET module. 445 * 446 * FIXME: cleanup struct net_device such that network protocol info 447 * moves out. 448 */ 449 450 struct net_device 451 { 452 453 /* 454 * This is the first field of the "visible" part of this structure 455 * (i.e. as seen by users in the "Space.c" file). It is the name 456 * the interface. 457 */ 458 char name[IFNAMSIZ]; 459 /* device name hash chain */ 460 struct hlist_node name_hlist; 461 462 /* 463 * I/O specific fields 464 * FIXME: Merge these and struct ifmap into one 465 */ 466 unsigned long mem_end; /* shared mem end */ 467 unsigned long mem_start; /* shared mem start */ 468 unsigned long base_addr; /* device I/O address */ 469 unsigned int irq; /* device IRQ number */ 470 471 /* 472 * Some hardware also needs these fields, but they are not 473 * part of the usual set specified in Space.c. 474 */ 475 476 unsigned char if_port; /* Selectable AUI, TP,..*/ 477 unsigned char dma; /* DMA channel */ 478 479 unsigned long state; 480 481 struct list_head dev_list; 482 #ifdef CONFIG_NETPOLL 483 struct list_head napi_list; 484 #endif 485 486 /* The device initialization function. Called only once. */ 487 int (*init)(struct net_device *dev); 488 489 /* ------- Fields preinitialized in Space.c finish here ------- */ 490 491 /* Net device features */ 492 unsigned long features; 493 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 494 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 495 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 496 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 497 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 498 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 499 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 500 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 501 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 502 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 503 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 504 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 505 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 506 /* do not use LLTX in new drivers */ 507 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 508 #define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */ 509 #define NETIF_F_LRO 32768 /* large receive offload */ 510 511 /* Segmentation offload features */ 512 #define NETIF_F_GSO_SHIFT 16 513 #define NETIF_F_GSO_MASK 0xffff0000 514 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 515 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 516 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 517 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 518 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 519 520 /* List of features with software fallbacks. */ 521 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) 522 523 524 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 525 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 526 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 527 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 528 529 struct net_device *next_sched; 530 531 /* Interface index. Unique device identifier */ 532 int ifindex; 533 int iflink; 534 535 536 struct net_device_stats* (*get_stats)(struct net_device *dev); 537 struct net_device_stats stats; 538 539 #ifdef CONFIG_WIRELESS_EXT 540 /* List of functions to handle Wireless Extensions (instead of ioctl). 541 * See <net/iw_handler.h> for details. Jean II */ 542 const struct iw_handler_def * wireless_handlers; 543 /* Instance data managed by the core of Wireless Extensions. */ 544 struct iw_public_data * wireless_data; 545 #endif 546 const struct ethtool_ops *ethtool_ops; 547 548 /* Hardware header description */ 549 const struct header_ops *header_ops; 550 551 /* 552 * This marks the end of the "visible" part of the structure. All 553 * fields hereafter are internal to the system, and may change at 554 * will (read: may be cleaned up at will). 555 */ 556 557 558 unsigned int flags; /* interface flags (a la BSD) */ 559 unsigned short gflags; 560 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ 561 unsigned short padded; /* How much padding added by alloc_netdev() */ 562 563 unsigned char operstate; /* RFC2863 operstate */ 564 unsigned char link_mode; /* mapping policy to operstate */ 565 566 unsigned mtu; /* interface MTU value */ 567 unsigned short type; /* interface hardware type */ 568 unsigned short hard_header_len; /* hardware hdr length */ 569 570 struct net_device *master; /* Pointer to master device of a group, 571 * which this device is member of. 572 */ 573 574 /* Interface address info. */ 575 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 576 unsigned char addr_len; /* hardware address length */ 577 unsigned short dev_id; /* for shared network cards */ 578 579 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */ 580 int uc_count; /* Number of installed ucasts */ 581 int uc_promisc; 582 struct dev_addr_list *mc_list; /* Multicast mac addresses */ 583 int mc_count; /* Number of installed mcasts */ 584 int promiscuity; 585 int allmulti; 586 587 588 /* Protocol specific pointers */ 589 590 void *atalk_ptr; /* AppleTalk link */ 591 void *ip_ptr; /* IPv4 specific data */ 592 void *dn_ptr; /* DECnet specific data */ 593 void *ip6_ptr; /* IPv6 specific data */ 594 void *ec_ptr; /* Econet specific data */ 595 void *ax25_ptr; /* AX.25 specific data */ 596 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 597 assign before registering */ 598 599 /* 600 * Cache line mostly used on receive path (including eth_type_trans()) 601 */ 602 unsigned long last_rx; /* Time of last Rx */ 603 /* Interface address info used in eth_type_trans() */ 604 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast 605 because most packets are unicast) */ 606 607 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 608 609 /* ingress path synchronizer */ 610 spinlock_t ingress_lock; 611 struct Qdisc *qdisc_ingress; 612 613 /* 614 * Cache line mostly used on queue transmit path (qdisc) 615 */ 616 /* device queue lock */ 617 spinlock_t queue_lock ____cacheline_aligned_in_smp; 618 struct Qdisc *qdisc; 619 struct Qdisc *qdisc_sleeping; 620 struct list_head qdisc_list; 621 unsigned long tx_queue_len; /* Max frames per queue allowed */ 622 623 /* Partially transmitted GSO packet. */ 624 struct sk_buff *gso_skb; 625 626 /* 627 * One part is mostly used on xmit path (device) 628 */ 629 /* hard_start_xmit synchronizer */ 630 spinlock_t _xmit_lock ____cacheline_aligned_in_smp; 631 /* cpu id of processor entered to hard_start_xmit or -1, 632 if nobody entered there. 633 */ 634 int xmit_lock_owner; 635 void *priv; /* pointer to private data */ 636 int (*hard_start_xmit) (struct sk_buff *skb, 637 struct net_device *dev); 638 /* These may be needed for future network-power-down code. */ 639 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 640 641 int watchdog_timeo; /* used by dev_watchdog() */ 642 struct timer_list watchdog_timer; 643 644 /* 645 * refcnt is a very hot point, so align it on SMP 646 */ 647 /* Number of references to this device */ 648 atomic_t refcnt ____cacheline_aligned_in_smp; 649 650 /* delayed register/unregister */ 651 struct list_head todo_list; 652 /* device index hash chain */ 653 struct hlist_node index_hlist; 654 655 struct net_device *link_watch_next; 656 657 /* register/unregister state machine */ 658 enum { NETREG_UNINITIALIZED=0, 659 NETREG_REGISTERED, /* completed register_netdevice */ 660 NETREG_UNREGISTERING, /* called unregister_netdevice */ 661 NETREG_UNREGISTERED, /* completed unregister todo */ 662 NETREG_RELEASED, /* called free_netdev */ 663 } reg_state; 664 665 /* Called after device is detached from network. */ 666 void (*uninit)(struct net_device *dev); 667 /* Called after last user reference disappears. */ 668 void (*destructor)(struct net_device *dev); 669 670 /* Pointers to interface service routines. */ 671 int (*open)(struct net_device *dev); 672 int (*stop)(struct net_device *dev); 673 #define HAVE_NETDEV_POLL 674 #define HAVE_CHANGE_RX_FLAGS 675 void (*change_rx_flags)(struct net_device *dev, 676 int flags); 677 #define HAVE_SET_RX_MODE 678 void (*set_rx_mode)(struct net_device *dev); 679 #define HAVE_MULTICAST 680 void (*set_multicast_list)(struct net_device *dev); 681 #define HAVE_SET_MAC_ADDR 682 int (*set_mac_address)(struct net_device *dev, 683 void *addr); 684 #define HAVE_VALIDATE_ADDR 685 int (*validate_addr)(struct net_device *dev); 686 #define HAVE_PRIVATE_IOCTL 687 int (*do_ioctl)(struct net_device *dev, 688 struct ifreq *ifr, int cmd); 689 #define HAVE_SET_CONFIG 690 int (*set_config)(struct net_device *dev, 691 struct ifmap *map); 692 #define HAVE_CHANGE_MTU 693 int (*change_mtu)(struct net_device *dev, int new_mtu); 694 695 #define HAVE_TX_TIMEOUT 696 void (*tx_timeout) (struct net_device *dev); 697 698 void (*vlan_rx_register)(struct net_device *dev, 699 struct vlan_group *grp); 700 void (*vlan_rx_add_vid)(struct net_device *dev, 701 unsigned short vid); 702 void (*vlan_rx_kill_vid)(struct net_device *dev, 703 unsigned short vid); 704 705 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *); 706 #ifdef CONFIG_NETPOLL 707 struct netpoll_info *npinfo; 708 #endif 709 #ifdef CONFIG_NET_POLL_CONTROLLER 710 void (*poll_controller)(struct net_device *dev); 711 #endif 712 713 #ifdef CONFIG_NET_NS 714 /* Network namespace this network device is inside */ 715 struct net *nd_net; 716 #endif 717 718 /* bridge stuff */ 719 struct net_bridge_port *br_port; 720 /* macvlan */ 721 struct macvlan_port *macvlan_port; 722 723 /* class/net/name entry */ 724 struct device dev; 725 /* space for optional statistics and wireless sysfs groups */ 726 struct attribute_group *sysfs_groups[3]; 727 728 /* rtnetlink link ops */ 729 const struct rtnl_link_ops *rtnl_link_ops; 730 731 /* for setting kernel sock attribute on TCP connection setup */ 732 #define GSO_MAX_SIZE 65536 733 unsigned int gso_max_size; 734 735 /* The TX queue control structures */ 736 unsigned int egress_subqueue_count; 737 struct net_device_subqueue egress_subqueue[1]; 738 }; 739 #define to_net_dev(d) container_of(d, struct net_device, dev) 740 741 #define NETDEV_ALIGN 32 742 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) 743 744 /* 745 * Net namespace inlines 746 */ 747 static inline 748 struct net *dev_net(const struct net_device *dev) 749 { 750 #ifdef CONFIG_NET_NS 751 return dev->nd_net; 752 #else 753 return &init_net; 754 #endif 755 } 756 757 static inline 758 void dev_net_set(struct net_device *dev, struct net *net) 759 { 760 #ifdef CONFIG_NET_NS 761 release_net(dev->nd_net); 762 dev->nd_net = hold_net(net); 763 #endif 764 } 765 766 /** 767 * netdev_priv - access network device private data 768 * @dev: network device 769 * 770 * Get network device private data 771 */ 772 static inline void *netdev_priv(const struct net_device *dev) 773 { 774 return dev->priv; 775 } 776 777 /* Set the sysfs physical device reference for the network logical device 778 * if set prior to registration will cause a symlink during initialization. 779 */ 780 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 781 782 /** 783 * netif_napi_add - initialize a napi context 784 * @dev: network device 785 * @napi: napi context 786 * @poll: polling function 787 * @weight: default weight 788 * 789 * netif_napi_add() must be used to initialize a napi context prior to calling 790 * *any* of the other napi related functions. 791 */ 792 static inline void netif_napi_add(struct net_device *dev, 793 struct napi_struct *napi, 794 int (*poll)(struct napi_struct *, int), 795 int weight) 796 { 797 INIT_LIST_HEAD(&napi->poll_list); 798 napi->poll = poll; 799 napi->weight = weight; 800 #ifdef CONFIG_NETPOLL 801 napi->dev = dev; 802 list_add(&napi->dev_list, &dev->napi_list); 803 spin_lock_init(&napi->poll_lock); 804 napi->poll_owner = -1; 805 #endif 806 set_bit(NAPI_STATE_SCHED, &napi->state); 807 } 808 809 struct packet_type { 810 __be16 type; /* This is really htons(ether_type). */ 811 struct net_device *dev; /* NULL is wildcarded here */ 812 int (*func) (struct sk_buff *, 813 struct net_device *, 814 struct packet_type *, 815 struct net_device *); 816 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 817 int features); 818 int (*gso_send_check)(struct sk_buff *skb); 819 void *af_packet_priv; 820 struct list_head list; 821 }; 822 823 #include <linux/interrupt.h> 824 #include <linux/notifier.h> 825 826 extern rwlock_t dev_base_lock; /* Device list lock */ 827 828 829 #define for_each_netdev(net, d) \ 830 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 831 #define for_each_netdev_safe(net, d, n) \ 832 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 833 #define for_each_netdev_continue(net, d) \ 834 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 835 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 836 837 static inline struct net_device *next_net_device(struct net_device *dev) 838 { 839 struct list_head *lh; 840 struct net *net; 841 842 net = dev_net(dev); 843 lh = dev->dev_list.next; 844 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 845 } 846 847 static inline struct net_device *first_net_device(struct net *net) 848 { 849 return list_empty(&net->dev_base_head) ? NULL : 850 net_device_entry(net->dev_base_head.next); 851 } 852 853 extern int netdev_boot_setup_check(struct net_device *dev); 854 extern unsigned long netdev_boot_base(const char *prefix, int unit); 855 extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); 856 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 857 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 858 extern void dev_add_pack(struct packet_type *pt); 859 extern void dev_remove_pack(struct packet_type *pt); 860 extern void __dev_remove_pack(struct packet_type *pt); 861 862 extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, 863 unsigned short mask); 864 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 865 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 866 extern int dev_alloc_name(struct net_device *dev, const char *name); 867 extern int dev_open(struct net_device *dev); 868 extern int dev_close(struct net_device *dev); 869 extern int dev_queue_xmit(struct sk_buff *skb); 870 extern int register_netdevice(struct net_device *dev); 871 extern void unregister_netdevice(struct net_device *dev); 872 extern void free_netdev(struct net_device *dev); 873 extern void synchronize_net(void); 874 extern int register_netdevice_notifier(struct notifier_block *nb); 875 extern int unregister_netdevice_notifier(struct notifier_block *nb); 876 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 877 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 878 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 879 extern int dev_restart(struct net_device *dev); 880 #ifdef CONFIG_NETPOLL_TRAP 881 extern int netpoll_trap(void); 882 #endif 883 884 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 885 unsigned short type, 886 const void *daddr, const void *saddr, 887 unsigned len) 888 { 889 if (!dev->header_ops || !dev->header_ops->create) 890 return 0; 891 892 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 893 } 894 895 static inline int dev_parse_header(const struct sk_buff *skb, 896 unsigned char *haddr) 897 { 898 const struct net_device *dev = skb->dev; 899 900 if (!dev->header_ops || !dev->header_ops->parse) 901 return 0; 902 return dev->header_ops->parse(skb, haddr); 903 } 904 905 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 906 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 907 static inline int unregister_gifconf(unsigned int family) 908 { 909 return register_gifconf(family, NULL); 910 } 911 912 /* 913 * Incoming packets are placed on per-cpu queues so that 914 * no locking is needed. 915 */ 916 struct softnet_data 917 { 918 struct net_device *output_queue; 919 struct sk_buff_head input_pkt_queue; 920 struct list_head poll_list; 921 struct sk_buff *completion_queue; 922 923 struct napi_struct backlog; 924 #ifdef CONFIG_NET_DMA 925 struct dma_chan *net_dma; 926 #endif 927 }; 928 929 DECLARE_PER_CPU(struct softnet_data,softnet_data); 930 931 #define HAVE_NETIF_QUEUE 932 933 extern void __netif_schedule(struct net_device *dev); 934 935 static inline void netif_schedule(struct net_device *dev) 936 { 937 if (!test_bit(__LINK_STATE_XOFF, &dev->state)) 938 __netif_schedule(dev); 939 } 940 941 /** 942 * netif_start_queue - allow transmit 943 * @dev: network device 944 * 945 * Allow upper layers to call the device hard_start_xmit routine. 946 */ 947 static inline void netif_start_queue(struct net_device *dev) 948 { 949 clear_bit(__LINK_STATE_XOFF, &dev->state); 950 } 951 952 /** 953 * netif_wake_queue - restart transmit 954 * @dev: network device 955 * 956 * Allow upper layers to call the device hard_start_xmit routine. 957 * Used for flow control when transmit resources are available. 958 */ 959 static inline void netif_wake_queue(struct net_device *dev) 960 { 961 #ifdef CONFIG_NETPOLL_TRAP 962 if (netpoll_trap()) { 963 clear_bit(__LINK_STATE_XOFF, &dev->state); 964 return; 965 } 966 #endif 967 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state)) 968 __netif_schedule(dev); 969 } 970 971 /** 972 * netif_stop_queue - stop transmitted packets 973 * @dev: network device 974 * 975 * Stop upper layers calling the device hard_start_xmit routine. 976 * Used for flow control when transmit resources are unavailable. 977 */ 978 static inline void netif_stop_queue(struct net_device *dev) 979 { 980 set_bit(__LINK_STATE_XOFF, &dev->state); 981 } 982 983 /** 984 * netif_queue_stopped - test if transmit queue is flowblocked 985 * @dev: network device 986 * 987 * Test if transmit queue on device is currently unable to send. 988 */ 989 static inline int netif_queue_stopped(const struct net_device *dev) 990 { 991 return test_bit(__LINK_STATE_XOFF, &dev->state); 992 } 993 994 /** 995 * netif_running - test if up 996 * @dev: network device 997 * 998 * Test if the device has been brought up. 999 */ 1000 static inline int netif_running(const struct net_device *dev) 1001 { 1002 return test_bit(__LINK_STATE_START, &dev->state); 1003 } 1004 1005 /* 1006 * Routines to manage the subqueues on a device. We only need start 1007 * stop, and a check if it's stopped. All other device management is 1008 * done at the overall netdevice level. 1009 * Also test the device if we're multiqueue. 1010 */ 1011 1012 /** 1013 * netif_start_subqueue - allow sending packets on subqueue 1014 * @dev: network device 1015 * @queue_index: sub queue index 1016 * 1017 * Start individual transmit queue of a device with multiple transmit queues. 1018 */ 1019 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1020 { 1021 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1022 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); 1023 #endif 1024 } 1025 1026 /** 1027 * netif_stop_subqueue - stop sending packets on subqueue 1028 * @dev: network device 1029 * @queue_index: sub queue index 1030 * 1031 * Stop individual transmit queue of a device with multiple transmit queues. 1032 */ 1033 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1034 { 1035 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1036 #ifdef CONFIG_NETPOLL_TRAP 1037 if (netpoll_trap()) 1038 return; 1039 #endif 1040 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state); 1041 #endif 1042 } 1043 1044 /** 1045 * netif_subqueue_stopped - test status of subqueue 1046 * @dev: network device 1047 * @queue_index: sub queue index 1048 * 1049 * Check individual transmit queue of a device with multiple transmit queues. 1050 */ 1051 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1052 u16 queue_index) 1053 { 1054 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1055 return test_bit(__LINK_STATE_XOFF, 1056 &dev->egress_subqueue[queue_index].state); 1057 #else 1058 return 0; 1059 #endif 1060 } 1061 1062 static inline int netif_subqueue_stopped(const struct net_device *dev, 1063 struct sk_buff *skb) 1064 { 1065 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1066 } 1067 1068 /** 1069 * netif_wake_subqueue - allow sending packets on subqueue 1070 * @dev: network device 1071 * @queue_index: sub queue index 1072 * 1073 * Resume individual transmit queue of a device with multiple transmit queues. 1074 */ 1075 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1076 { 1077 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1078 #ifdef CONFIG_NETPOLL_TRAP 1079 if (netpoll_trap()) 1080 return; 1081 #endif 1082 if (test_and_clear_bit(__LINK_STATE_XOFF, 1083 &dev->egress_subqueue[queue_index].state)) 1084 __netif_schedule(dev); 1085 #endif 1086 } 1087 1088 /** 1089 * netif_is_multiqueue - test if device has multiple transmit queues 1090 * @dev: network device 1091 * 1092 * Check if device has multiple transmit queues 1093 * Always falls if NETDEVICE_MULTIQUEUE is not configured 1094 */ 1095 static inline int netif_is_multiqueue(const struct net_device *dev) 1096 { 1097 #ifdef CONFIG_NETDEVICES_MULTIQUEUE 1098 return (!!(NETIF_F_MULTI_QUEUE & dev->features)); 1099 #else 1100 return 0; 1101 #endif 1102 } 1103 1104 /* Use this variant when it is known for sure that it 1105 * is executing from hardware interrupt context or with hardware interrupts 1106 * disabled. 1107 */ 1108 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1109 1110 /* Use this variant in places where it could be invoked 1111 * from either hardware interrupt or other context, with hardware interrupts 1112 * either disabled or enabled. 1113 */ 1114 extern void dev_kfree_skb_any(struct sk_buff *skb); 1115 1116 #define HAVE_NETIF_RX 1 1117 extern int netif_rx(struct sk_buff *skb); 1118 extern int netif_rx_ni(struct sk_buff *skb); 1119 #define HAVE_NETIF_RECEIVE_SKB 1 1120 extern int netif_receive_skb(struct sk_buff *skb); 1121 extern int dev_valid_name(const char *name); 1122 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1123 extern int dev_ethtool(struct net *net, struct ifreq *); 1124 extern unsigned dev_get_flags(const struct net_device *); 1125 extern int dev_change_flags(struct net_device *, unsigned); 1126 extern int dev_change_name(struct net_device *, char *); 1127 extern int dev_change_net_namespace(struct net_device *, 1128 struct net *, const char *); 1129 extern int dev_set_mtu(struct net_device *, int); 1130 extern int dev_set_mac_address(struct net_device *, 1131 struct sockaddr *); 1132 extern int dev_hard_start_xmit(struct sk_buff *skb, 1133 struct net_device *dev); 1134 1135 extern int netdev_budget; 1136 1137 /* Called by rtnetlink.c:rtnl_unlock() */ 1138 extern void netdev_run_todo(void); 1139 1140 /** 1141 * dev_put - release reference to device 1142 * @dev: network device 1143 * 1144 * Release reference to device to allow it to be freed. 1145 */ 1146 static inline void dev_put(struct net_device *dev) 1147 { 1148 atomic_dec(&dev->refcnt); 1149 } 1150 1151 /** 1152 * dev_hold - get reference to device 1153 * @dev: network device 1154 * 1155 * Hold reference to device to keep it from being freed. 1156 */ 1157 static inline void dev_hold(struct net_device *dev) 1158 { 1159 atomic_inc(&dev->refcnt); 1160 } 1161 1162 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1163 * and _off may be called from IRQ context, but it is caller 1164 * who is responsible for serialization of these calls. 1165 * 1166 * The name carrier is inappropriate, these functions should really be 1167 * called netif_lowerlayer_*() because they represent the state of any 1168 * kind of lower layer not just hardware media. 1169 */ 1170 1171 extern void linkwatch_fire_event(struct net_device *dev); 1172 1173 /** 1174 * netif_carrier_ok - test if carrier present 1175 * @dev: network device 1176 * 1177 * Check if carrier is present on device 1178 */ 1179 static inline int netif_carrier_ok(const struct net_device *dev) 1180 { 1181 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1182 } 1183 1184 extern void __netdev_watchdog_up(struct net_device *dev); 1185 1186 extern void netif_carrier_on(struct net_device *dev); 1187 1188 extern void netif_carrier_off(struct net_device *dev); 1189 1190 /** 1191 * netif_dormant_on - mark device as dormant. 1192 * @dev: network device 1193 * 1194 * Mark device as dormant (as per RFC2863). 1195 * 1196 * The dormant state indicates that the relevant interface is not 1197 * actually in a condition to pass packets (i.e., it is not 'up') but is 1198 * in a "pending" state, waiting for some external event. For "on- 1199 * demand" interfaces, this new state identifies the situation where the 1200 * interface is waiting for events to place it in the up state. 1201 * 1202 */ 1203 static inline void netif_dormant_on(struct net_device *dev) 1204 { 1205 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1206 linkwatch_fire_event(dev); 1207 } 1208 1209 /** 1210 * netif_dormant_off - set device as not dormant. 1211 * @dev: network device 1212 * 1213 * Device is not in dormant state. 1214 */ 1215 static inline void netif_dormant_off(struct net_device *dev) 1216 { 1217 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1218 linkwatch_fire_event(dev); 1219 } 1220 1221 /** 1222 * netif_dormant - test if carrier present 1223 * @dev: network device 1224 * 1225 * Check if carrier is present on device 1226 */ 1227 static inline int netif_dormant(const struct net_device *dev) 1228 { 1229 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1230 } 1231 1232 1233 /** 1234 * netif_oper_up - test if device is operational 1235 * @dev: network device 1236 * 1237 * Check if carrier is operational 1238 */ 1239 static inline int netif_oper_up(const struct net_device *dev) { 1240 return (dev->operstate == IF_OPER_UP || 1241 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1242 } 1243 1244 /** 1245 * netif_device_present - is device available or removed 1246 * @dev: network device 1247 * 1248 * Check if device has not been removed from system. 1249 */ 1250 static inline int netif_device_present(struct net_device *dev) 1251 { 1252 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1253 } 1254 1255 extern void netif_device_detach(struct net_device *dev); 1256 1257 extern void netif_device_attach(struct net_device *dev); 1258 1259 /* 1260 * Network interface message level settings 1261 */ 1262 #define HAVE_NETIF_MSG 1 1263 1264 enum { 1265 NETIF_MSG_DRV = 0x0001, 1266 NETIF_MSG_PROBE = 0x0002, 1267 NETIF_MSG_LINK = 0x0004, 1268 NETIF_MSG_TIMER = 0x0008, 1269 NETIF_MSG_IFDOWN = 0x0010, 1270 NETIF_MSG_IFUP = 0x0020, 1271 NETIF_MSG_RX_ERR = 0x0040, 1272 NETIF_MSG_TX_ERR = 0x0080, 1273 NETIF_MSG_TX_QUEUED = 0x0100, 1274 NETIF_MSG_INTR = 0x0200, 1275 NETIF_MSG_TX_DONE = 0x0400, 1276 NETIF_MSG_RX_STATUS = 0x0800, 1277 NETIF_MSG_PKTDATA = 0x1000, 1278 NETIF_MSG_HW = 0x2000, 1279 NETIF_MSG_WOL = 0x4000, 1280 }; 1281 1282 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 1283 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 1284 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 1285 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 1286 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 1287 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 1288 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 1289 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 1290 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 1291 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 1292 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 1293 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 1294 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 1295 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 1296 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 1297 1298 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 1299 { 1300 /* use default */ 1301 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 1302 return default_msg_enable_bits; 1303 if (debug_value == 0) /* no output */ 1304 return 0; 1305 /* set low N bits */ 1306 return (1 << debug_value) - 1; 1307 } 1308 1309 /* Test if receive needs to be scheduled but only if up */ 1310 static inline int netif_rx_schedule_prep(struct net_device *dev, 1311 struct napi_struct *napi) 1312 { 1313 return napi_schedule_prep(napi); 1314 } 1315 1316 /* Add interface to tail of rx poll list. This assumes that _prep has 1317 * already been called and returned 1. 1318 */ 1319 static inline void __netif_rx_schedule(struct net_device *dev, 1320 struct napi_struct *napi) 1321 { 1322 __napi_schedule(napi); 1323 } 1324 1325 /* Try to reschedule poll. Called by irq handler. */ 1326 1327 static inline void netif_rx_schedule(struct net_device *dev, 1328 struct napi_struct *napi) 1329 { 1330 if (netif_rx_schedule_prep(dev, napi)) 1331 __netif_rx_schedule(dev, napi); 1332 } 1333 1334 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ 1335 static inline int netif_rx_reschedule(struct net_device *dev, 1336 struct napi_struct *napi) 1337 { 1338 if (napi_schedule_prep(napi)) { 1339 __netif_rx_schedule(dev, napi); 1340 return 1; 1341 } 1342 return 0; 1343 } 1344 1345 /* same as netif_rx_complete, except that local_irq_save(flags) 1346 * has already been issued 1347 */ 1348 static inline void __netif_rx_complete(struct net_device *dev, 1349 struct napi_struct *napi) 1350 { 1351 __napi_complete(napi); 1352 } 1353 1354 /* Remove interface from poll list: it must be in the poll list 1355 * on current cpu. This primitive is called by dev->poll(), when 1356 * it completes the work. The device cannot be out of poll list at this 1357 * moment, it is BUG(). 1358 */ 1359 static inline void netif_rx_complete(struct net_device *dev, 1360 struct napi_struct *napi) 1361 { 1362 unsigned long flags; 1363 1364 local_irq_save(flags); 1365 __netif_rx_complete(dev, napi); 1366 local_irq_restore(flags); 1367 } 1368 1369 /** 1370 * netif_tx_lock - grab network device transmit lock 1371 * @dev: network device 1372 * @cpu: cpu number of lock owner 1373 * 1374 * Get network device transmit lock 1375 */ 1376 static inline void __netif_tx_lock(struct net_device *dev, int cpu) 1377 { 1378 spin_lock(&dev->_xmit_lock); 1379 dev->xmit_lock_owner = cpu; 1380 } 1381 1382 static inline void netif_tx_lock(struct net_device *dev) 1383 { 1384 __netif_tx_lock(dev, smp_processor_id()); 1385 } 1386 1387 static inline void netif_tx_lock_bh(struct net_device *dev) 1388 { 1389 spin_lock_bh(&dev->_xmit_lock); 1390 dev->xmit_lock_owner = smp_processor_id(); 1391 } 1392 1393 static inline int netif_tx_trylock(struct net_device *dev) 1394 { 1395 int ok = spin_trylock(&dev->_xmit_lock); 1396 if (likely(ok)) 1397 dev->xmit_lock_owner = smp_processor_id(); 1398 return ok; 1399 } 1400 1401 static inline void netif_tx_unlock(struct net_device *dev) 1402 { 1403 dev->xmit_lock_owner = -1; 1404 spin_unlock(&dev->_xmit_lock); 1405 } 1406 1407 static inline void netif_tx_unlock_bh(struct net_device *dev) 1408 { 1409 dev->xmit_lock_owner = -1; 1410 spin_unlock_bh(&dev->_xmit_lock); 1411 } 1412 1413 #define HARD_TX_LOCK(dev, cpu) { \ 1414 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1415 __netif_tx_lock(dev, cpu); \ 1416 } \ 1417 } 1418 1419 #define HARD_TX_UNLOCK(dev) { \ 1420 if ((dev->features & NETIF_F_LLTX) == 0) { \ 1421 netif_tx_unlock(dev); \ 1422 } \ 1423 } 1424 1425 static inline void netif_tx_disable(struct net_device *dev) 1426 { 1427 netif_tx_lock_bh(dev); 1428 netif_stop_queue(dev); 1429 netif_tx_unlock_bh(dev); 1430 } 1431 1432 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 1433 1434 extern void ether_setup(struct net_device *dev); 1435 1436 /* Support for loadable net-drivers */ 1437 extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, 1438 void (*setup)(struct net_device *), 1439 unsigned int queue_count); 1440 #define alloc_netdev(sizeof_priv, name, setup) \ 1441 alloc_netdev_mq(sizeof_priv, name, setup, 1) 1442 extern int register_netdev(struct net_device *dev); 1443 extern void unregister_netdev(struct net_device *dev); 1444 /* Functions used for secondary unicast and multicast support */ 1445 extern void dev_set_rx_mode(struct net_device *dev); 1446 extern void __dev_set_rx_mode(struct net_device *dev); 1447 extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen); 1448 extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); 1449 extern int dev_unicast_sync(struct net_device *to, struct net_device *from); 1450 extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); 1451 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); 1452 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); 1453 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 1454 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 1455 extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); 1456 extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); 1457 extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1458 extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); 1459 extern void dev_set_promiscuity(struct net_device *dev, int inc); 1460 extern void dev_set_allmulti(struct net_device *dev, int inc); 1461 extern void netdev_state_change(struct net_device *dev); 1462 extern void netdev_features_change(struct net_device *dev); 1463 /* Load a device via the kmod */ 1464 extern void dev_load(struct net *net, const char *name); 1465 extern void dev_mcast_init(void); 1466 extern int netdev_max_backlog; 1467 extern int weight_p; 1468 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 1469 extern int skb_checksum_help(struct sk_buff *skb); 1470 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 1471 #ifdef CONFIG_BUG 1472 extern void netdev_rx_csum_fault(struct net_device *dev); 1473 #else 1474 static inline void netdev_rx_csum_fault(struct net_device *dev) 1475 { 1476 } 1477 #endif 1478 /* rx skb timestamps */ 1479 extern void net_enable_timestamp(void); 1480 extern void net_disable_timestamp(void); 1481 1482 #ifdef CONFIG_PROC_FS 1483 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 1484 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 1485 extern void dev_seq_stop(struct seq_file *seq, void *v); 1486 #endif 1487 1488 extern void linkwatch_run_queue(void); 1489 1490 extern int netdev_compute_features(unsigned long all, unsigned long one); 1491 1492 static inline int net_gso_ok(int features, int gso_type) 1493 { 1494 int feature = gso_type << NETIF_F_GSO_SHIFT; 1495 return (features & feature) == feature; 1496 } 1497 1498 static inline int skb_gso_ok(struct sk_buff *skb, int features) 1499 { 1500 return net_gso_ok(features, skb_shinfo(skb)->gso_type); 1501 } 1502 1503 static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) 1504 { 1505 return skb_is_gso(skb) && 1506 (!skb_gso_ok(skb, dev->features) || 1507 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 1508 } 1509 1510 static inline void netif_set_gso_max_size(struct net_device *dev, 1511 unsigned int size) 1512 { 1513 dev->gso_max_size = size; 1514 } 1515 1516 /* On bonding slaves other than the currently active slave, suppress 1517 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and 1518 * ARP on active-backup slaves with arp_validate enabled. 1519 */ 1520 static inline int skb_bond_should_drop(struct sk_buff *skb) 1521 { 1522 struct net_device *dev = skb->dev; 1523 struct net_device *master = dev->master; 1524 1525 if (master && 1526 (dev->priv_flags & IFF_SLAVE_INACTIVE)) { 1527 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && 1528 skb->protocol == __constant_htons(ETH_P_ARP)) 1529 return 0; 1530 1531 if (master->priv_flags & IFF_MASTER_ALB) { 1532 if (skb->pkt_type != PACKET_BROADCAST && 1533 skb->pkt_type != PACKET_MULTICAST) 1534 return 0; 1535 } 1536 if (master->priv_flags & IFF_MASTER_8023AD && 1537 skb->protocol == __constant_htons(ETH_P_SLOW)) 1538 return 0; 1539 1540 return 1; 1541 } 1542 return 0; 1543 } 1544 1545 #endif /* __KERNEL__ */ 1546 1547 #endif /* _LINUX_DEV_H */ 1548