1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Definitions for the Interfaces handler. 7 * 8 * Version: @(#)dev.h 1.0.10 08/12/93 9 * 10 * Authors: Ross Biro 11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12 * Corey Minyard <wf-rch!minyard@relay.EU.net> 13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> 14 * Alan Cox, <alan@lxorguk.ukuu.org.uk> 15 * Bjorn Ekwall. <bj0rn@blox.se> 16 * Pekka Riikonen <priikone@poseidon.pspt.fi> 17 * 18 * This program is free software; you can redistribute it and/or 19 * modify it under the terms of the GNU General Public License 20 * as published by the Free Software Foundation; either version 21 * 2 of the License, or (at your option) any later version. 22 * 23 * Moved to /usr/include/linux for NET3 24 */ 25 #ifndef _LINUX_NETDEVICE_H 26 #define _LINUX_NETDEVICE_H 27 28 #include <linux/if.h> 29 #include <linux/if_ether.h> 30 #include <linux/if_packet.h> 31 #include <linux/if_link.h> 32 33 #ifdef __KERNEL__ 34 #include <linux/pm_qos_params.h> 35 #include <linux/timer.h> 36 #include <linux/delay.h> 37 #include <linux/mm.h> 38 #include <asm/atomic.h> 39 #include <asm/cache.h> 40 #include <asm/byteorder.h> 41 42 #include <linux/device.h> 43 #include <linux/percpu.h> 44 #include <linux/rculist.h> 45 #include <linux/dmaengine.h> 46 #include <linux/workqueue.h> 47 48 #include <linux/ethtool.h> 49 #include <net/net_namespace.h> 50 #include <net/dsa.h> 51 #ifdef CONFIG_DCB 52 #include <net/dcbnl.h> 53 #endif 54 55 struct vlan_group; 56 struct netpoll_info; 57 struct phy_device; 58 /* 802.11 specific */ 59 struct wireless_dev; 60 /* source back-compat hooks */ 61 #define SET_ETHTOOL_OPS(netdev,ops) \ 62 ( (netdev)->ethtool_ops = (ops) ) 63 64 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev 65 functions are available. */ 66 #define HAVE_FREE_NETDEV /* free_netdev() */ 67 #define HAVE_NETDEV_PRIV /* netdev_priv() */ 68 69 /* hardware address assignment types */ 70 #define NET_ADDR_PERM 0 /* address is permanent (default) */ 71 #define NET_ADDR_RANDOM 1 /* address is generated randomly */ 72 #define NET_ADDR_STOLEN 2 /* address is stolen from other device */ 73 74 /* Backlog congestion levels */ 75 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ 76 #define NET_RX_DROP 1 /* packet dropped */ 77 78 /* 79 * Transmit return codes: transmit return codes originate from three different 80 * namespaces: 81 * 82 * - qdisc return codes 83 * - driver transmit return codes 84 * - errno values 85 * 86 * Drivers are allowed to return any one of those in their hard_start_xmit() 87 * function. Real network devices commonly used with qdiscs should only return 88 * the driver transmit return codes though - when qdiscs are used, the actual 89 * transmission happens asynchronously, so the value is not propagated to 90 * higher layers. Virtual network devices transmit synchronously, in this case 91 * the driver transmit return codes are consumed by dev_queue_xmit(), all 92 * others are propagated to higher layers. 93 */ 94 95 /* qdisc ->enqueue() return codes. */ 96 #define NET_XMIT_SUCCESS 0x00 97 #define NET_XMIT_DROP 0x01 /* skb dropped */ 98 #define NET_XMIT_CN 0x02 /* congestion notification */ 99 #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ 100 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ 101 102 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It 103 * indicates that the device will soon be dropping packets, or already drops 104 * some packets of the same priority; prompting us to send less aggressively. */ 105 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) 106 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) 107 108 /* Driver transmit return codes */ 109 #define NETDEV_TX_MASK 0xf0 110 111 enum netdev_tx { 112 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ 113 NETDEV_TX_OK = 0x00, /* driver took care of packet */ 114 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ 115 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ 116 }; 117 typedef enum netdev_tx netdev_tx_t; 118 119 /* 120 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; 121 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. 122 */ 123 static inline bool dev_xmit_complete(int rc) 124 { 125 /* 126 * Positive cases with an skb consumed by a driver: 127 * - successful transmission (rc == NETDEV_TX_OK) 128 * - error while transmitting (rc < 0) 129 * - error while queueing to a different device (rc & NET_XMIT_MASK) 130 */ 131 if (likely(rc < NET_XMIT_MASK)) 132 return true; 133 134 return false; 135 } 136 137 #endif 138 139 #define MAX_ADDR_LEN 32 /* Largest hardware address length */ 140 141 #ifdef __KERNEL__ 142 /* 143 * Compute the worst case header length according to the protocols 144 * used. 145 */ 146 147 #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 148 # if defined(CONFIG_MAC80211_MESH) 149 # define LL_MAX_HEADER 128 150 # else 151 # define LL_MAX_HEADER 96 152 # endif 153 #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) 154 # define LL_MAX_HEADER 48 155 #else 156 # define LL_MAX_HEADER 32 157 #endif 158 159 #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ 160 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ 161 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ 162 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) 163 #define MAX_HEADER LL_MAX_HEADER 164 #else 165 #define MAX_HEADER (LL_MAX_HEADER + 48) 166 #endif 167 168 /* 169 * Old network device statistics. Fields are native words 170 * (unsigned long) so they can be read and written atomically. 171 */ 172 173 struct net_device_stats { 174 unsigned long rx_packets; 175 unsigned long tx_packets; 176 unsigned long rx_bytes; 177 unsigned long tx_bytes; 178 unsigned long rx_errors; 179 unsigned long tx_errors; 180 unsigned long rx_dropped; 181 unsigned long tx_dropped; 182 unsigned long multicast; 183 unsigned long collisions; 184 unsigned long rx_length_errors; 185 unsigned long rx_over_errors; 186 unsigned long rx_crc_errors; 187 unsigned long rx_frame_errors; 188 unsigned long rx_fifo_errors; 189 unsigned long rx_missed_errors; 190 unsigned long tx_aborted_errors; 191 unsigned long tx_carrier_errors; 192 unsigned long tx_fifo_errors; 193 unsigned long tx_heartbeat_errors; 194 unsigned long tx_window_errors; 195 unsigned long rx_compressed; 196 unsigned long tx_compressed; 197 }; 198 199 #endif /* __KERNEL__ */ 200 201 202 /* Media selection options. */ 203 enum { 204 IF_PORT_UNKNOWN = 0, 205 IF_PORT_10BASE2, 206 IF_PORT_10BASET, 207 IF_PORT_AUI, 208 IF_PORT_100BASET, 209 IF_PORT_100BASETX, 210 IF_PORT_100BASEFX 211 }; 212 213 #ifdef __KERNEL__ 214 215 #include <linux/cache.h> 216 #include <linux/skbuff.h> 217 218 struct neighbour; 219 struct neigh_parms; 220 struct sk_buff; 221 222 struct netdev_hw_addr { 223 struct list_head list; 224 unsigned char addr[MAX_ADDR_LEN]; 225 unsigned char type; 226 #define NETDEV_HW_ADDR_T_LAN 1 227 #define NETDEV_HW_ADDR_T_SAN 2 228 #define NETDEV_HW_ADDR_T_SLAVE 3 229 #define NETDEV_HW_ADDR_T_UNICAST 4 230 #define NETDEV_HW_ADDR_T_MULTICAST 5 231 bool synced; 232 bool global_use; 233 int refcount; 234 struct rcu_head rcu_head; 235 }; 236 237 struct netdev_hw_addr_list { 238 struct list_head list; 239 int count; 240 }; 241 242 #define netdev_hw_addr_list_count(l) ((l)->count) 243 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) 244 #define netdev_hw_addr_list_for_each(ha, l) \ 245 list_for_each_entry(ha, &(l)->list, list) 246 247 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) 248 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) 249 #define netdev_for_each_uc_addr(ha, dev) \ 250 netdev_hw_addr_list_for_each(ha, &(dev)->uc) 251 252 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) 253 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) 254 #define netdev_for_each_mc_addr(ha, dev) \ 255 netdev_hw_addr_list_for_each(ha, &(dev)->mc) 256 257 struct hh_cache { 258 struct hh_cache *hh_next; /* Next entry */ 259 atomic_t hh_refcnt; /* number of users */ 260 /* 261 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate 262 * cache line on SMP. 263 * They are mostly read, but hh_refcnt may be changed quite frequently, 264 * incurring cache line ping pongs. 265 */ 266 __be16 hh_type ____cacheline_aligned_in_smp; 267 /* protocol identifier, f.e ETH_P_IP 268 * NOTE: For VLANs, this will be the 269 * encapuslated type. --BLG 270 */ 271 u16 hh_len; /* length of header */ 272 int (*hh_output)(struct sk_buff *skb); 273 seqlock_t hh_lock; 274 275 /* cached hardware header; allow for machine alignment needs. */ 276 #define HH_DATA_MOD 16 277 #define HH_DATA_OFF(__len) \ 278 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) 279 #define HH_DATA_ALIGN(__len) \ 280 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) 281 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; 282 }; 283 284 static inline void hh_cache_put(struct hh_cache *hh) 285 { 286 if (atomic_dec_and_test(&hh->hh_refcnt)) 287 kfree(hh); 288 } 289 290 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. 291 * Alternative is: 292 * dev->hard_header_len ? (dev->hard_header_len + 293 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 294 * 295 * We could use other alignment values, but we must maintain the 296 * relationship HH alignment <= LL alignment. 297 * 298 * LL_ALLOCATED_SPACE also takes into account the tailroom the device 299 * may need. 300 */ 301 #define LL_RESERVED_SPACE(dev) \ 302 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 303 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ 304 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 305 #define LL_ALLOCATED_SPACE(dev) \ 306 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) 307 308 struct header_ops { 309 int (*create) (struct sk_buff *skb, struct net_device *dev, 310 unsigned short type, const void *daddr, 311 const void *saddr, unsigned len); 312 int (*parse)(const struct sk_buff *skb, unsigned char *haddr); 313 int (*rebuild)(struct sk_buff *skb); 314 #define HAVE_HEADER_CACHE 315 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); 316 void (*cache_update)(struct hh_cache *hh, 317 const struct net_device *dev, 318 const unsigned char *haddr); 319 }; 320 321 /* These flag bits are private to the generic network queueing 322 * layer, they may not be explicitly referenced by any other 323 * code. 324 */ 325 326 enum netdev_state_t { 327 __LINK_STATE_START, 328 __LINK_STATE_PRESENT, 329 __LINK_STATE_NOCARRIER, 330 __LINK_STATE_LINKWATCH_PENDING, 331 __LINK_STATE_DORMANT, 332 }; 333 334 335 /* 336 * This structure holds at boot time configured netdevice settings. They 337 * are then used in the device probing. 338 */ 339 struct netdev_boot_setup { 340 char name[IFNAMSIZ]; 341 struct ifmap map; 342 }; 343 #define NETDEV_BOOT_SETUP_MAX 8 344 345 extern int __init netdev_boot_setup(char *str); 346 347 /* 348 * Structure for NAPI scheduling similar to tasklet but with weighting 349 */ 350 struct napi_struct { 351 /* The poll_list must only be managed by the entity which 352 * changes the state of the NAPI_STATE_SCHED bit. This means 353 * whoever atomically sets that bit can add this napi_struct 354 * to the per-cpu poll_list, and whoever clears that bit 355 * can remove from the list right before clearing the bit. 356 */ 357 struct list_head poll_list; 358 359 unsigned long state; 360 int weight; 361 int (*poll)(struct napi_struct *, int); 362 #ifdef CONFIG_NETPOLL 363 spinlock_t poll_lock; 364 int poll_owner; 365 #endif 366 367 unsigned int gro_count; 368 369 struct net_device *dev; 370 struct list_head dev_list; 371 struct sk_buff *gro_list; 372 struct sk_buff *skb; 373 }; 374 375 enum { 376 NAPI_STATE_SCHED, /* Poll is scheduled */ 377 NAPI_STATE_DISABLE, /* Disable pending */ 378 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ 379 }; 380 381 enum gro_result { 382 GRO_MERGED, 383 GRO_MERGED_FREE, 384 GRO_HELD, 385 GRO_NORMAL, 386 GRO_DROP, 387 }; 388 typedef enum gro_result gro_result_t; 389 390 typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb); 391 392 extern void __napi_schedule(struct napi_struct *n); 393 394 static inline int napi_disable_pending(struct napi_struct *n) 395 { 396 return test_bit(NAPI_STATE_DISABLE, &n->state); 397 } 398 399 /** 400 * napi_schedule_prep - check if napi can be scheduled 401 * @n: napi context 402 * 403 * Test if NAPI routine is already running, and if not mark 404 * it as running. This is used as a condition variable 405 * insure only one NAPI poll instance runs. We also make 406 * sure there is no pending NAPI disable. 407 */ 408 static inline int napi_schedule_prep(struct napi_struct *n) 409 { 410 return !napi_disable_pending(n) && 411 !test_and_set_bit(NAPI_STATE_SCHED, &n->state); 412 } 413 414 /** 415 * napi_schedule - schedule NAPI poll 416 * @n: napi context 417 * 418 * Schedule NAPI poll routine to be called if it is not already 419 * running. 420 */ 421 static inline void napi_schedule(struct napi_struct *n) 422 { 423 if (napi_schedule_prep(n)) 424 __napi_schedule(n); 425 } 426 427 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ 428 static inline int napi_reschedule(struct napi_struct *napi) 429 { 430 if (napi_schedule_prep(napi)) { 431 __napi_schedule(napi); 432 return 1; 433 } 434 return 0; 435 } 436 437 /** 438 * napi_complete - NAPI processing complete 439 * @n: napi context 440 * 441 * Mark NAPI processing as complete. 442 */ 443 extern void __napi_complete(struct napi_struct *n); 444 extern void napi_complete(struct napi_struct *n); 445 446 /** 447 * napi_disable - prevent NAPI from scheduling 448 * @n: napi context 449 * 450 * Stop NAPI from being scheduled on this context. 451 * Waits till any outstanding processing completes. 452 */ 453 static inline void napi_disable(struct napi_struct *n) 454 { 455 set_bit(NAPI_STATE_DISABLE, &n->state); 456 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) 457 msleep(1); 458 clear_bit(NAPI_STATE_DISABLE, &n->state); 459 } 460 461 /** 462 * napi_enable - enable NAPI scheduling 463 * @n: napi context 464 * 465 * Resume NAPI from being scheduled on this context. 466 * Must be paired with napi_disable. 467 */ 468 static inline void napi_enable(struct napi_struct *n) 469 { 470 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); 471 smp_mb__before_clear_bit(); 472 clear_bit(NAPI_STATE_SCHED, &n->state); 473 } 474 475 #ifdef CONFIG_SMP 476 /** 477 * napi_synchronize - wait until NAPI is not running 478 * @n: napi context 479 * 480 * Wait until NAPI is done being scheduled on this context. 481 * Waits till any outstanding processing completes but 482 * does not disable future activations. 483 */ 484 static inline void napi_synchronize(const struct napi_struct *n) 485 { 486 while (test_bit(NAPI_STATE_SCHED, &n->state)) 487 msleep(1); 488 } 489 #else 490 # define napi_synchronize(n) barrier() 491 #endif 492 493 enum netdev_queue_state_t { 494 __QUEUE_STATE_XOFF, 495 __QUEUE_STATE_FROZEN, 496 #define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \ 497 (1 << __QUEUE_STATE_FROZEN)) 498 }; 499 500 struct netdev_queue { 501 /* 502 * read mostly part 503 */ 504 struct net_device *dev; 505 struct Qdisc *qdisc; 506 unsigned long state; 507 struct Qdisc *qdisc_sleeping; 508 #ifdef CONFIG_RPS 509 struct kobject kobj; 510 #endif 511 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) 512 int numa_node; 513 #endif 514 /* 515 * write mostly part 516 */ 517 spinlock_t _xmit_lock ____cacheline_aligned_in_smp; 518 int xmit_lock_owner; 519 /* 520 * please use this field instead of dev->trans_start 521 */ 522 unsigned long trans_start; 523 } ____cacheline_aligned_in_smp; 524 525 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) 526 { 527 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) 528 return q->numa_node; 529 #else 530 return NUMA_NO_NODE; 531 #endif 532 } 533 534 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) 535 { 536 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) 537 q->numa_node = node; 538 #endif 539 } 540 541 #ifdef CONFIG_RPS 542 /* 543 * This structure holds an RPS map which can be of variable length. The 544 * map is an array of CPUs. 545 */ 546 struct rps_map { 547 unsigned int len; 548 struct rcu_head rcu; 549 u16 cpus[0]; 550 }; 551 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16))) 552 553 /* 554 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the 555 * tail pointer for that CPU's input queue at the time of last enqueue. 556 */ 557 struct rps_dev_flow { 558 u16 cpu; 559 u16 fill; 560 unsigned int last_qtail; 561 }; 562 563 /* 564 * The rps_dev_flow_table structure contains a table of flow mappings. 565 */ 566 struct rps_dev_flow_table { 567 unsigned int mask; 568 struct rcu_head rcu; 569 struct work_struct free_work; 570 struct rps_dev_flow flows[0]; 571 }; 572 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ 573 (_num * sizeof(struct rps_dev_flow))) 574 575 /* 576 * The rps_sock_flow_table contains mappings of flows to the last CPU 577 * on which they were processed by the application (set in recvmsg). 578 */ 579 struct rps_sock_flow_table { 580 unsigned int mask; 581 u16 ents[0]; 582 }; 583 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ 584 (_num * sizeof(u16))) 585 586 #define RPS_NO_CPU 0xffff 587 588 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, 589 u32 hash) 590 { 591 if (table && hash) { 592 unsigned int cpu, index = hash & table->mask; 593 594 /* We only give a hint, preemption can change cpu under us */ 595 cpu = raw_smp_processor_id(); 596 597 if (table->ents[index] != cpu) 598 table->ents[index] = cpu; 599 } 600 } 601 602 static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, 603 u32 hash) 604 { 605 if (table && hash) 606 table->ents[hash & table->mask] = RPS_NO_CPU; 607 } 608 609 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; 610 611 /* This structure contains an instance of an RX queue. */ 612 struct netdev_rx_queue { 613 struct rps_map __rcu *rps_map; 614 struct rps_dev_flow_table __rcu *rps_flow_table; 615 struct kobject kobj; 616 struct net_device *dev; 617 } ____cacheline_aligned_in_smp; 618 #endif /* CONFIG_RPS */ 619 620 #ifdef CONFIG_XPS 621 /* 622 * This structure holds an XPS map which can be of variable length. The 623 * map is an array of queues. 624 */ 625 struct xps_map { 626 unsigned int len; 627 unsigned int alloc_len; 628 struct rcu_head rcu; 629 u16 queues[0]; 630 }; 631 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16))) 632 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ 633 / sizeof(u16)) 634 635 /* 636 * This structure holds all XPS maps for device. Maps are indexed by CPU. 637 */ 638 struct xps_dev_maps { 639 struct rcu_head rcu; 640 struct xps_map __rcu *cpu_map[0]; 641 }; 642 #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ 643 (nr_cpu_ids * sizeof(struct xps_map *))) 644 #endif /* CONFIG_XPS */ 645 646 /* 647 * This structure defines the management hooks for network devices. 648 * The following hooks can be defined; unless noted otherwise, they are 649 * optional and can be filled with a null pointer. 650 * 651 * int (*ndo_init)(struct net_device *dev); 652 * This function is called once when network device is registered. 653 * The network device can use this to any late stage initializaton 654 * or semantic validattion. It can fail with an error code which will 655 * be propogated back to register_netdev 656 * 657 * void (*ndo_uninit)(struct net_device *dev); 658 * This function is called when device is unregistered or when registration 659 * fails. It is not called if init fails. 660 * 661 * int (*ndo_open)(struct net_device *dev); 662 * This function is called when network device transistions to the up 663 * state. 664 * 665 * int (*ndo_stop)(struct net_device *dev); 666 * This function is called when network device transistions to the down 667 * state. 668 * 669 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, 670 * struct net_device *dev); 671 * Called when a packet needs to be transmitted. 672 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. 673 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) 674 * Required can not be NULL. 675 * 676 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); 677 * Called to decide which queue to when device supports multiple 678 * transmit queues. 679 * 680 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); 681 * This function is called to allow device receiver to make 682 * changes to configuration when multicast or promiscious is enabled. 683 * 684 * void (*ndo_set_rx_mode)(struct net_device *dev); 685 * This function is called device changes address list filtering. 686 * 687 * void (*ndo_set_multicast_list)(struct net_device *dev); 688 * This function is called when the multicast address list changes. 689 * 690 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); 691 * This function is called when the Media Access Control address 692 * needs to be changed. If this interface is not defined, the 693 * mac address can not be changed. 694 * 695 * int (*ndo_validate_addr)(struct net_device *dev); 696 * Test if Media Access Control address is valid for the device. 697 * 698 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); 699 * Called when a user request an ioctl which can't be handled by 700 * the generic interface code. If not defined ioctl's return 701 * not supported error code. 702 * 703 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); 704 * Used to set network devices bus interface parameters. This interface 705 * is retained for legacy reason, new devices should use the bus 706 * interface (PCI) for low level management. 707 * 708 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); 709 * Called when a user wants to change the Maximum Transfer Unit 710 * of a device. If not defined, any request to change MTU will 711 * will return an error. 712 * 713 * void (*ndo_tx_timeout)(struct net_device *dev); 714 * Callback uses when the transmitter has not made any progress 715 * for dev->watchdog ticks. 716 * 717 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, 718 * struct rtnl_link_stats64 *storage); 719 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); 720 * Called when a user wants to get the network device usage 721 * statistics. Drivers must do one of the following: 722 * 1. Define @ndo_get_stats64 to fill in a zero-initialised 723 * rtnl_link_stats64 structure passed by the caller. 724 * 2. Define @ndo_get_stats to update a net_device_stats structure 725 * (which should normally be dev->stats) and return a pointer to 726 * it. The structure may be changed asynchronously only if each 727 * field is written atomically. 728 * 3. Update dev->stats asynchronously and atomically, and define 729 * neither operation. 730 * 731 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); 732 * If device support VLAN receive acceleration 733 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called 734 * when vlan groups for the device changes. Note: grp is NULL 735 * if no vlan's groups are being used. 736 * 737 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); 738 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 739 * this function is called when a VLAN id is registered. 740 * 741 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); 742 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) 743 * this function is called when a VLAN id is unregistered. 744 * 745 * void (*ndo_poll_controller)(struct net_device *dev); 746 * 747 * SR-IOV management functions. 748 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); 749 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); 750 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); 751 * int (*ndo_get_vf_config)(struct net_device *dev, 752 * int vf, struct ifla_vf_info *ivf); 753 * int (*ndo_set_vf_port)(struct net_device *dev, int vf, 754 * struct nlattr *port[]); 755 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); 756 */ 757 #define HAVE_NET_DEVICE_OPS 758 struct net_device_ops { 759 int (*ndo_init)(struct net_device *dev); 760 void (*ndo_uninit)(struct net_device *dev); 761 int (*ndo_open)(struct net_device *dev); 762 int (*ndo_stop)(struct net_device *dev); 763 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, 764 struct net_device *dev); 765 u16 (*ndo_select_queue)(struct net_device *dev, 766 struct sk_buff *skb); 767 void (*ndo_change_rx_flags)(struct net_device *dev, 768 int flags); 769 void (*ndo_set_rx_mode)(struct net_device *dev); 770 void (*ndo_set_multicast_list)(struct net_device *dev); 771 int (*ndo_set_mac_address)(struct net_device *dev, 772 void *addr); 773 int (*ndo_validate_addr)(struct net_device *dev); 774 int (*ndo_do_ioctl)(struct net_device *dev, 775 struct ifreq *ifr, int cmd); 776 int (*ndo_set_config)(struct net_device *dev, 777 struct ifmap *map); 778 int (*ndo_change_mtu)(struct net_device *dev, 779 int new_mtu); 780 int (*ndo_neigh_setup)(struct net_device *dev, 781 struct neigh_parms *); 782 void (*ndo_tx_timeout) (struct net_device *dev); 783 784 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, 785 struct rtnl_link_stats64 *storage); 786 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); 787 788 void (*ndo_vlan_rx_register)(struct net_device *dev, 789 struct vlan_group *grp); 790 void (*ndo_vlan_rx_add_vid)(struct net_device *dev, 791 unsigned short vid); 792 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, 793 unsigned short vid); 794 #ifdef CONFIG_NET_POLL_CONTROLLER 795 void (*ndo_poll_controller)(struct net_device *dev); 796 int (*ndo_netpoll_setup)(struct net_device *dev, 797 struct netpoll_info *info); 798 void (*ndo_netpoll_cleanup)(struct net_device *dev); 799 #endif 800 int (*ndo_set_vf_mac)(struct net_device *dev, 801 int queue, u8 *mac); 802 int (*ndo_set_vf_vlan)(struct net_device *dev, 803 int queue, u16 vlan, u8 qos); 804 int (*ndo_set_vf_tx_rate)(struct net_device *dev, 805 int vf, int rate); 806 int (*ndo_get_vf_config)(struct net_device *dev, 807 int vf, 808 struct ifla_vf_info *ivf); 809 int (*ndo_set_vf_port)(struct net_device *dev, 810 int vf, 811 struct nlattr *port[]); 812 int (*ndo_get_vf_port)(struct net_device *dev, 813 int vf, struct sk_buff *skb); 814 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 815 int (*ndo_fcoe_enable)(struct net_device *dev); 816 int (*ndo_fcoe_disable)(struct net_device *dev); 817 int (*ndo_fcoe_ddp_setup)(struct net_device *dev, 818 u16 xid, 819 struct scatterlist *sgl, 820 unsigned int sgc); 821 int (*ndo_fcoe_ddp_done)(struct net_device *dev, 822 u16 xid); 823 #define NETDEV_FCOE_WWNN 0 824 #define NETDEV_FCOE_WWPN 1 825 int (*ndo_fcoe_get_wwn)(struct net_device *dev, 826 u64 *wwn, int type); 827 #endif 828 }; 829 830 /* 831 * The DEVICE structure. 832 * Actually, this whole structure is a big mistake. It mixes I/O 833 * data with strictly "high-level" data, and it has to know about 834 * almost every data structure used in the INET module. 835 * 836 * FIXME: cleanup struct net_device such that network protocol info 837 * moves out. 838 */ 839 840 struct net_device { 841 842 /* 843 * This is the first field of the "visible" part of this structure 844 * (i.e. as seen by users in the "Space.c" file). It is the name 845 * of the interface. 846 */ 847 char name[IFNAMSIZ]; 848 849 struct pm_qos_request_list pm_qos_req; 850 851 /* device name hash chain */ 852 struct hlist_node name_hlist; 853 /* snmp alias */ 854 char *ifalias; 855 856 /* 857 * I/O specific fields 858 * FIXME: Merge these and struct ifmap into one 859 */ 860 unsigned long mem_end; /* shared mem end */ 861 unsigned long mem_start; /* shared mem start */ 862 unsigned long base_addr; /* device I/O address */ 863 unsigned int irq; /* device IRQ number */ 864 865 /* 866 * Some hardware also needs these fields, but they are not 867 * part of the usual set specified in Space.c. 868 */ 869 870 unsigned char if_port; /* Selectable AUI, TP,..*/ 871 unsigned char dma; /* DMA channel */ 872 873 unsigned long state; 874 875 struct list_head dev_list; 876 struct list_head napi_list; 877 struct list_head unreg_list; 878 879 /* Net device features */ 880 unsigned long features; 881 #define NETIF_F_SG 1 /* Scatter/gather IO. */ 882 #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ 883 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ 884 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ 885 #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ 886 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ 887 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ 888 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ 889 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ 890 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ 891 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ 892 #define NETIF_F_GSO 2048 /* Enable software GSO. */ 893 #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ 894 /* do not use LLTX in new drivers */ 895 #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ 896 #define NETIF_F_GRO 16384 /* Generic receive offload */ 897 #define NETIF_F_LRO 32768 /* large receive offload */ 898 899 /* the GSO_MASK reserves bits 16 through 23 */ 900 #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ 901 #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ 902 #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ 903 #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ 904 #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ 905 906 /* Segmentation offload features */ 907 #define NETIF_F_GSO_SHIFT 16 908 #define NETIF_F_GSO_MASK 0x00ff0000 909 #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) 910 #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) 911 #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) 912 #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) 913 #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) 914 #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) 915 916 /* List of features with software fallbacks. */ 917 #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \ 918 NETIF_F_TSO6 | NETIF_F_UFO) 919 920 921 #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) 922 #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) 923 #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) 924 #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) 925 926 /* 927 * If one device supports one of these features, then enable them 928 * for all in netdev_increment_features. 929 */ 930 #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ 931 NETIF_F_SG | NETIF_F_HIGHDMA | \ 932 NETIF_F_FRAGLIST) 933 934 /* Interface index. Unique device identifier */ 935 int ifindex; 936 int iflink; 937 938 struct net_device_stats stats; 939 atomic_long_t rx_dropped; /* dropped packets by core network 940 * Do not use this in drivers. 941 */ 942 943 #ifdef CONFIG_WIRELESS_EXT 944 /* List of functions to handle Wireless Extensions (instead of ioctl). 945 * See <net/iw_handler.h> for details. Jean II */ 946 const struct iw_handler_def * wireless_handlers; 947 /* Instance data managed by the core of Wireless Extensions. */ 948 struct iw_public_data * wireless_data; 949 #endif 950 /* Management operations */ 951 const struct net_device_ops *netdev_ops; 952 const struct ethtool_ops *ethtool_ops; 953 954 /* Hardware header description */ 955 const struct header_ops *header_ops; 956 957 unsigned int flags; /* interface flags (a la BSD) */ 958 unsigned short gflags; 959 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */ 960 unsigned short padded; /* How much padding added by alloc_netdev() */ 961 962 unsigned char operstate; /* RFC2863 operstate */ 963 unsigned char link_mode; /* mapping policy to operstate */ 964 965 unsigned int mtu; /* interface MTU value */ 966 unsigned short type; /* interface hardware type */ 967 unsigned short hard_header_len; /* hardware hdr length */ 968 969 /* extra head- and tailroom the hardware may need, but not in all cases 970 * can this be guaranteed, especially tailroom. Some cases also use 971 * LL_MAX_HEADER instead to allocate the skb. 972 */ 973 unsigned short needed_headroom; 974 unsigned short needed_tailroom; 975 976 /* Interface address info. */ 977 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ 978 unsigned char addr_assign_type; /* hw address assignment type */ 979 unsigned char addr_len; /* hardware address length */ 980 unsigned short dev_id; /* for shared network cards */ 981 982 spinlock_t addr_list_lock; 983 struct netdev_hw_addr_list uc; /* Unicast mac addresses */ 984 struct netdev_hw_addr_list mc; /* Multicast mac addresses */ 985 int uc_promisc; 986 unsigned int promiscuity; 987 unsigned int allmulti; 988 989 990 /* Protocol specific pointers */ 991 992 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) 993 struct vlan_group __rcu *vlgrp; /* VLAN group */ 994 #endif 995 #ifdef CONFIG_NET_DSA 996 void *dsa_ptr; /* dsa specific data */ 997 #endif 998 void *atalk_ptr; /* AppleTalk link */ 999 struct in_device __rcu *ip_ptr; /* IPv4 specific data */ 1000 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ 1001 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ 1002 void *ec_ptr; /* Econet specific data */ 1003 void *ax25_ptr; /* AX.25 specific data */ 1004 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, 1005 assign before registering */ 1006 1007 /* 1008 * Cache lines mostly used on receive path (including eth_type_trans()) 1009 */ 1010 unsigned long last_rx; /* Time of last Rx 1011 * This should not be set in 1012 * drivers, unless really needed, 1013 * because network stack (bonding) 1014 * use it if/when necessary, to 1015 * avoid dirtying this cache line. 1016 */ 1017 1018 struct net_device *master; /* Pointer to master device of a group, 1019 * which this device is member of. 1020 */ 1021 1022 /* Interface address info used in eth_type_trans() */ 1023 unsigned char *dev_addr; /* hw address, (before bcast 1024 because most packets are 1025 unicast) */ 1026 1027 struct netdev_hw_addr_list dev_addrs; /* list of device 1028 hw addresses */ 1029 1030 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ 1031 1032 #ifdef CONFIG_RPS 1033 struct kset *queues_kset; 1034 1035 struct netdev_rx_queue *_rx; 1036 1037 /* Number of RX queues allocated at register_netdev() time */ 1038 unsigned int num_rx_queues; 1039 1040 /* Number of RX queues currently active in device */ 1041 unsigned int real_num_rx_queues; 1042 #endif 1043 1044 rx_handler_func_t __rcu *rx_handler; 1045 void __rcu *rx_handler_data; 1046 1047 struct netdev_queue __rcu *ingress_queue; 1048 1049 /* 1050 * Cache lines mostly used on transmit path 1051 */ 1052 struct netdev_queue *_tx ____cacheline_aligned_in_smp; 1053 1054 /* Number of TX queues allocated at alloc_netdev_mq() time */ 1055 unsigned int num_tx_queues; 1056 1057 /* Number of TX queues currently active in device */ 1058 unsigned int real_num_tx_queues; 1059 1060 /* root qdisc from userspace point of view */ 1061 struct Qdisc *qdisc; 1062 1063 unsigned long tx_queue_len; /* Max frames per queue allowed */ 1064 spinlock_t tx_global_lock; 1065 1066 #ifdef CONFIG_XPS 1067 struct xps_dev_maps __rcu *xps_maps; 1068 #endif 1069 1070 /* These may be needed for future network-power-down code. */ 1071 1072 /* 1073 * trans_start here is expensive for high speed devices on SMP, 1074 * please use netdev_queue->trans_start instead. 1075 */ 1076 unsigned long trans_start; /* Time (in jiffies) of last Tx */ 1077 1078 int watchdog_timeo; /* used by dev_watchdog() */ 1079 struct timer_list watchdog_timer; 1080 1081 /* Number of references to this device */ 1082 int __percpu *pcpu_refcnt; 1083 1084 /* delayed register/unregister */ 1085 struct list_head todo_list; 1086 /* device index hash chain */ 1087 struct hlist_node index_hlist; 1088 1089 struct list_head link_watch_list; 1090 1091 /* register/unregister state machine */ 1092 enum { NETREG_UNINITIALIZED=0, 1093 NETREG_REGISTERED, /* completed register_netdevice */ 1094 NETREG_UNREGISTERING, /* called unregister_netdevice */ 1095 NETREG_UNREGISTERED, /* completed unregister todo */ 1096 NETREG_RELEASED, /* called free_netdev */ 1097 NETREG_DUMMY, /* dummy device for NAPI poll */ 1098 } reg_state:16; 1099 1100 enum { 1101 RTNL_LINK_INITIALIZED, 1102 RTNL_LINK_INITIALIZING, 1103 } rtnl_link_state:16; 1104 1105 /* Called from unregister, can be used to call free_netdev */ 1106 void (*destructor)(struct net_device *dev); 1107 1108 #ifdef CONFIG_NETPOLL 1109 struct netpoll_info *npinfo; 1110 #endif 1111 1112 #ifdef CONFIG_NET_NS 1113 /* Network namespace this network device is inside */ 1114 struct net *nd_net; 1115 #endif 1116 1117 /* mid-layer private */ 1118 union { 1119 void *ml_priv; 1120 struct pcpu_lstats __percpu *lstats; /* loopback stats */ 1121 struct pcpu_tstats __percpu *tstats; /* tunnel stats */ 1122 struct pcpu_dstats __percpu *dstats; /* dummy stats */ 1123 }; 1124 /* GARP */ 1125 struct garp_port __rcu *garp_port; 1126 1127 /* class/net/name entry */ 1128 struct device dev; 1129 /* space for optional device, statistics, and wireless sysfs groups */ 1130 const struct attribute_group *sysfs_groups[4]; 1131 1132 /* rtnetlink link ops */ 1133 const struct rtnl_link_ops *rtnl_link_ops; 1134 1135 /* VLAN feature mask */ 1136 unsigned long vlan_features; 1137 1138 /* for setting kernel sock attribute on TCP connection setup */ 1139 #define GSO_MAX_SIZE 65536 1140 unsigned int gso_max_size; 1141 1142 #ifdef CONFIG_DCB 1143 /* Data Center Bridging netlink ops */ 1144 const struct dcbnl_rtnl_ops *dcbnl_ops; 1145 #endif 1146 1147 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) 1148 /* max exchange id for FCoE LRO by ddp */ 1149 unsigned int fcoe_ddp_xid; 1150 #endif 1151 /* n-tuple filter list attached to this device */ 1152 struct ethtool_rx_ntuple_list ethtool_ntuple_list; 1153 1154 /* phy device may attach itself for hardware timestamping */ 1155 struct phy_device *phydev; 1156 }; 1157 #define to_net_dev(d) container_of(d, struct net_device, dev) 1158 1159 #define NETDEV_ALIGN 32 1160 1161 static inline 1162 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, 1163 unsigned int index) 1164 { 1165 return &dev->_tx[index]; 1166 } 1167 1168 static inline void netdev_for_each_tx_queue(struct net_device *dev, 1169 void (*f)(struct net_device *, 1170 struct netdev_queue *, 1171 void *), 1172 void *arg) 1173 { 1174 unsigned int i; 1175 1176 for (i = 0; i < dev->num_tx_queues; i++) 1177 f(dev, &dev->_tx[i], arg); 1178 } 1179 1180 /* 1181 * Net namespace inlines 1182 */ 1183 static inline 1184 struct net *dev_net(const struct net_device *dev) 1185 { 1186 return read_pnet(&dev->nd_net); 1187 } 1188 1189 static inline 1190 void dev_net_set(struct net_device *dev, struct net *net) 1191 { 1192 #ifdef CONFIG_NET_NS 1193 release_net(dev->nd_net); 1194 dev->nd_net = hold_net(net); 1195 #endif 1196 } 1197 1198 static inline bool netdev_uses_dsa_tags(struct net_device *dev) 1199 { 1200 #ifdef CONFIG_NET_DSA_TAG_DSA 1201 if (dev->dsa_ptr != NULL) 1202 return dsa_uses_dsa_tags(dev->dsa_ptr); 1203 #endif 1204 1205 return 0; 1206 } 1207 1208 #ifndef CONFIG_NET_NS 1209 static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) 1210 { 1211 skb->dev = dev; 1212 } 1213 #else /* CONFIG_NET_NS */ 1214 void skb_set_dev(struct sk_buff *skb, struct net_device *dev); 1215 #endif 1216 1217 static inline bool netdev_uses_trailer_tags(struct net_device *dev) 1218 { 1219 #ifdef CONFIG_NET_DSA_TAG_TRAILER 1220 if (dev->dsa_ptr != NULL) 1221 return dsa_uses_trailer_tags(dev->dsa_ptr); 1222 #endif 1223 1224 return 0; 1225 } 1226 1227 /** 1228 * netdev_priv - access network device private data 1229 * @dev: network device 1230 * 1231 * Get network device private data 1232 */ 1233 static inline void *netdev_priv(const struct net_device *dev) 1234 { 1235 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); 1236 } 1237 1238 /* Set the sysfs physical device reference for the network logical device 1239 * if set prior to registration will cause a symlink during initialization. 1240 */ 1241 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) 1242 1243 /* Set the sysfs device type for the network logical device to allow 1244 * fin grained indentification of different network device types. For 1245 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. 1246 */ 1247 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) 1248 1249 /** 1250 * netif_napi_add - initialize a napi context 1251 * @dev: network device 1252 * @napi: napi context 1253 * @poll: polling function 1254 * @weight: default weight 1255 * 1256 * netif_napi_add() must be used to initialize a napi context prior to calling 1257 * *any* of the other napi related functions. 1258 */ 1259 void netif_napi_add(struct net_device *dev, struct napi_struct *napi, 1260 int (*poll)(struct napi_struct *, int), int weight); 1261 1262 /** 1263 * netif_napi_del - remove a napi context 1264 * @napi: napi context 1265 * 1266 * netif_napi_del() removes a napi context from the network device napi list 1267 */ 1268 void netif_napi_del(struct napi_struct *napi); 1269 1270 struct napi_gro_cb { 1271 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ 1272 void *frag0; 1273 1274 /* Length of frag0. */ 1275 unsigned int frag0_len; 1276 1277 /* This indicates where we are processing relative to skb->data. */ 1278 int data_offset; 1279 1280 /* This is non-zero if the packet may be of the same flow. */ 1281 int same_flow; 1282 1283 /* This is non-zero if the packet cannot be merged with the new skb. */ 1284 int flush; 1285 1286 /* Number of segments aggregated. */ 1287 int count; 1288 1289 /* Free the skb? */ 1290 int free; 1291 }; 1292 1293 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) 1294 1295 struct packet_type { 1296 __be16 type; /* This is really htons(ether_type). */ 1297 struct net_device *dev; /* NULL is wildcarded here */ 1298 int (*func) (struct sk_buff *, 1299 struct net_device *, 1300 struct packet_type *, 1301 struct net_device *); 1302 struct sk_buff *(*gso_segment)(struct sk_buff *skb, 1303 int features); 1304 int (*gso_send_check)(struct sk_buff *skb); 1305 struct sk_buff **(*gro_receive)(struct sk_buff **head, 1306 struct sk_buff *skb); 1307 int (*gro_complete)(struct sk_buff *skb); 1308 void *af_packet_priv; 1309 struct list_head list; 1310 }; 1311 1312 #include <linux/interrupt.h> 1313 #include <linux/notifier.h> 1314 1315 extern rwlock_t dev_base_lock; /* Device list lock */ 1316 1317 1318 #define for_each_netdev(net, d) \ 1319 list_for_each_entry(d, &(net)->dev_base_head, dev_list) 1320 #define for_each_netdev_reverse(net, d) \ 1321 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) 1322 #define for_each_netdev_rcu(net, d) \ 1323 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) 1324 #define for_each_netdev_safe(net, d, n) \ 1325 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) 1326 #define for_each_netdev_continue(net, d) \ 1327 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) 1328 #define for_each_netdev_continue_rcu(net, d) \ 1329 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) 1330 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) 1331 1332 static inline struct net_device *next_net_device(struct net_device *dev) 1333 { 1334 struct list_head *lh; 1335 struct net *net; 1336 1337 net = dev_net(dev); 1338 lh = dev->dev_list.next; 1339 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 1340 } 1341 1342 static inline struct net_device *next_net_device_rcu(struct net_device *dev) 1343 { 1344 struct list_head *lh; 1345 struct net *net; 1346 1347 net = dev_net(dev); 1348 lh = rcu_dereference(dev->dev_list.next); 1349 return lh == &net->dev_base_head ? NULL : net_device_entry(lh); 1350 } 1351 1352 static inline struct net_device *first_net_device(struct net *net) 1353 { 1354 return list_empty(&net->dev_base_head) ? NULL : 1355 net_device_entry(net->dev_base_head.next); 1356 } 1357 1358 extern int netdev_boot_setup_check(struct net_device *dev); 1359 extern unsigned long netdev_boot_base(const char *prefix, int unit); 1360 extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, 1361 const char *hwaddr); 1362 extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); 1363 extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); 1364 extern void dev_add_pack(struct packet_type *pt); 1365 extern void dev_remove_pack(struct packet_type *pt); 1366 extern void __dev_remove_pack(struct packet_type *pt); 1367 1368 extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, 1369 unsigned short mask); 1370 extern struct net_device *dev_get_by_name(struct net *net, const char *name); 1371 extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); 1372 extern struct net_device *__dev_get_by_name(struct net *net, const char *name); 1373 extern int dev_alloc_name(struct net_device *dev, const char *name); 1374 extern int dev_open(struct net_device *dev); 1375 extern int dev_close(struct net_device *dev); 1376 extern void dev_disable_lro(struct net_device *dev); 1377 extern int dev_queue_xmit(struct sk_buff *skb); 1378 extern int register_netdevice(struct net_device *dev); 1379 extern void unregister_netdevice_queue(struct net_device *dev, 1380 struct list_head *head); 1381 extern void unregister_netdevice_many(struct list_head *head); 1382 static inline void unregister_netdevice(struct net_device *dev) 1383 { 1384 unregister_netdevice_queue(dev, NULL); 1385 } 1386 1387 extern int netdev_refcnt_read(const struct net_device *dev); 1388 extern void free_netdev(struct net_device *dev); 1389 extern void synchronize_net(void); 1390 extern int register_netdevice_notifier(struct notifier_block *nb); 1391 extern int unregister_netdevice_notifier(struct notifier_block *nb); 1392 extern int init_dummy_netdev(struct net_device *dev); 1393 extern void netdev_resync_ops(struct net_device *dev); 1394 1395 extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); 1396 extern struct net_device *dev_get_by_index(struct net *net, int ifindex); 1397 extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); 1398 extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); 1399 extern int dev_restart(struct net_device *dev); 1400 #ifdef CONFIG_NETPOLL_TRAP 1401 extern int netpoll_trap(void); 1402 #endif 1403 extern int skb_gro_receive(struct sk_buff **head, 1404 struct sk_buff *skb); 1405 extern void skb_gro_reset_offset(struct sk_buff *skb); 1406 1407 static inline unsigned int skb_gro_offset(const struct sk_buff *skb) 1408 { 1409 return NAPI_GRO_CB(skb)->data_offset; 1410 } 1411 1412 static inline unsigned int skb_gro_len(const struct sk_buff *skb) 1413 { 1414 return skb->len - NAPI_GRO_CB(skb)->data_offset; 1415 } 1416 1417 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) 1418 { 1419 NAPI_GRO_CB(skb)->data_offset += len; 1420 } 1421 1422 static inline void *skb_gro_header_fast(struct sk_buff *skb, 1423 unsigned int offset) 1424 { 1425 return NAPI_GRO_CB(skb)->frag0 + offset; 1426 } 1427 1428 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) 1429 { 1430 return NAPI_GRO_CB(skb)->frag0_len < hlen; 1431 } 1432 1433 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, 1434 unsigned int offset) 1435 { 1436 NAPI_GRO_CB(skb)->frag0 = NULL; 1437 NAPI_GRO_CB(skb)->frag0_len = 0; 1438 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; 1439 } 1440 1441 static inline void *skb_gro_mac_header(struct sk_buff *skb) 1442 { 1443 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); 1444 } 1445 1446 static inline void *skb_gro_network_header(struct sk_buff *skb) 1447 { 1448 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + 1449 skb_network_offset(skb); 1450 } 1451 1452 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, 1453 unsigned short type, 1454 const void *daddr, const void *saddr, 1455 unsigned len) 1456 { 1457 if (!dev->header_ops || !dev->header_ops->create) 1458 return 0; 1459 1460 return dev->header_ops->create(skb, dev, type, daddr, saddr, len); 1461 } 1462 1463 static inline int dev_parse_header(const struct sk_buff *skb, 1464 unsigned char *haddr) 1465 { 1466 const struct net_device *dev = skb->dev; 1467 1468 if (!dev->header_ops || !dev->header_ops->parse) 1469 return 0; 1470 return dev->header_ops->parse(skb, haddr); 1471 } 1472 1473 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); 1474 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); 1475 static inline int unregister_gifconf(unsigned int family) 1476 { 1477 return register_gifconf(family, NULL); 1478 } 1479 1480 /* 1481 * Incoming packets are placed on per-cpu queues 1482 */ 1483 struct softnet_data { 1484 struct Qdisc *output_queue; 1485 struct Qdisc **output_queue_tailp; 1486 struct list_head poll_list; 1487 struct sk_buff *completion_queue; 1488 struct sk_buff_head process_queue; 1489 1490 /* stats */ 1491 unsigned int processed; 1492 unsigned int time_squeeze; 1493 unsigned int cpu_collision; 1494 unsigned int received_rps; 1495 1496 #ifdef CONFIG_RPS 1497 struct softnet_data *rps_ipi_list; 1498 1499 /* Elements below can be accessed between CPUs for RPS */ 1500 struct call_single_data csd ____cacheline_aligned_in_smp; 1501 struct softnet_data *rps_ipi_next; 1502 unsigned int cpu; 1503 unsigned int input_queue_head; 1504 unsigned int input_queue_tail; 1505 #endif 1506 unsigned dropped; 1507 struct sk_buff_head input_pkt_queue; 1508 struct napi_struct backlog; 1509 }; 1510 1511 static inline void input_queue_head_incr(struct softnet_data *sd) 1512 { 1513 #ifdef CONFIG_RPS 1514 sd->input_queue_head++; 1515 #endif 1516 } 1517 1518 static inline void input_queue_tail_incr_save(struct softnet_data *sd, 1519 unsigned int *qtail) 1520 { 1521 #ifdef CONFIG_RPS 1522 *qtail = ++sd->input_queue_tail; 1523 #endif 1524 } 1525 1526 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); 1527 1528 #define HAVE_NETIF_QUEUE 1529 1530 extern void __netif_schedule(struct Qdisc *q); 1531 1532 static inline void netif_schedule_queue(struct netdev_queue *txq) 1533 { 1534 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) 1535 __netif_schedule(txq->qdisc); 1536 } 1537 1538 static inline void netif_tx_schedule_all(struct net_device *dev) 1539 { 1540 unsigned int i; 1541 1542 for (i = 0; i < dev->num_tx_queues; i++) 1543 netif_schedule_queue(netdev_get_tx_queue(dev, i)); 1544 } 1545 1546 static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) 1547 { 1548 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1549 } 1550 1551 /** 1552 * netif_start_queue - allow transmit 1553 * @dev: network device 1554 * 1555 * Allow upper layers to call the device hard_start_xmit routine. 1556 */ 1557 static inline void netif_start_queue(struct net_device *dev) 1558 { 1559 netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); 1560 } 1561 1562 static inline void netif_tx_start_all_queues(struct net_device *dev) 1563 { 1564 unsigned int i; 1565 1566 for (i = 0; i < dev->num_tx_queues; i++) { 1567 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1568 netif_tx_start_queue(txq); 1569 } 1570 } 1571 1572 static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) 1573 { 1574 #ifdef CONFIG_NETPOLL_TRAP 1575 if (netpoll_trap()) { 1576 netif_tx_start_queue(dev_queue); 1577 return; 1578 } 1579 #endif 1580 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) 1581 __netif_schedule(dev_queue->qdisc); 1582 } 1583 1584 /** 1585 * netif_wake_queue - restart transmit 1586 * @dev: network device 1587 * 1588 * Allow upper layers to call the device hard_start_xmit routine. 1589 * Used for flow control when transmit resources are available. 1590 */ 1591 static inline void netif_wake_queue(struct net_device *dev) 1592 { 1593 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); 1594 } 1595 1596 static inline void netif_tx_wake_all_queues(struct net_device *dev) 1597 { 1598 unsigned int i; 1599 1600 for (i = 0; i < dev->num_tx_queues; i++) { 1601 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1602 netif_tx_wake_queue(txq); 1603 } 1604 } 1605 1606 static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) 1607 { 1608 if (WARN_ON(!dev_queue)) { 1609 printk(KERN_INFO "netif_stop_queue() cannot be called before " 1610 "register_netdev()"); 1611 return; 1612 } 1613 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1614 } 1615 1616 /** 1617 * netif_stop_queue - stop transmitted packets 1618 * @dev: network device 1619 * 1620 * Stop upper layers calling the device hard_start_xmit routine. 1621 * Used for flow control when transmit resources are unavailable. 1622 */ 1623 static inline void netif_stop_queue(struct net_device *dev) 1624 { 1625 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); 1626 } 1627 1628 static inline void netif_tx_stop_all_queues(struct net_device *dev) 1629 { 1630 unsigned int i; 1631 1632 for (i = 0; i < dev->num_tx_queues; i++) { 1633 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 1634 netif_tx_stop_queue(txq); 1635 } 1636 } 1637 1638 static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) 1639 { 1640 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); 1641 } 1642 1643 /** 1644 * netif_queue_stopped - test if transmit queue is flowblocked 1645 * @dev: network device 1646 * 1647 * Test if transmit queue on device is currently unable to send. 1648 */ 1649 static inline int netif_queue_stopped(const struct net_device *dev) 1650 { 1651 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); 1652 } 1653 1654 static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue) 1655 { 1656 return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN; 1657 } 1658 1659 /** 1660 * netif_running - test if up 1661 * @dev: network device 1662 * 1663 * Test if the device has been brought up. 1664 */ 1665 static inline int netif_running(const struct net_device *dev) 1666 { 1667 return test_bit(__LINK_STATE_START, &dev->state); 1668 } 1669 1670 /* 1671 * Routines to manage the subqueues on a device. We only need start 1672 * stop, and a check if it's stopped. All other device management is 1673 * done at the overall netdevice level. 1674 * Also test the device if we're multiqueue. 1675 */ 1676 1677 /** 1678 * netif_start_subqueue - allow sending packets on subqueue 1679 * @dev: network device 1680 * @queue_index: sub queue index 1681 * 1682 * Start individual transmit queue of a device with multiple transmit queues. 1683 */ 1684 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) 1685 { 1686 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1687 1688 netif_tx_start_queue(txq); 1689 } 1690 1691 /** 1692 * netif_stop_subqueue - stop sending packets on subqueue 1693 * @dev: network device 1694 * @queue_index: sub queue index 1695 * 1696 * Stop individual transmit queue of a device with multiple transmit queues. 1697 */ 1698 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) 1699 { 1700 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1701 #ifdef CONFIG_NETPOLL_TRAP 1702 if (netpoll_trap()) 1703 return; 1704 #endif 1705 netif_tx_stop_queue(txq); 1706 } 1707 1708 /** 1709 * netif_subqueue_stopped - test status of subqueue 1710 * @dev: network device 1711 * @queue_index: sub queue index 1712 * 1713 * Check individual transmit queue of a device with multiple transmit queues. 1714 */ 1715 static inline int __netif_subqueue_stopped(const struct net_device *dev, 1716 u16 queue_index) 1717 { 1718 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1719 1720 return netif_tx_queue_stopped(txq); 1721 } 1722 1723 static inline int netif_subqueue_stopped(const struct net_device *dev, 1724 struct sk_buff *skb) 1725 { 1726 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); 1727 } 1728 1729 /** 1730 * netif_wake_subqueue - allow sending packets on subqueue 1731 * @dev: network device 1732 * @queue_index: sub queue index 1733 * 1734 * Resume individual transmit queue of a device with multiple transmit queues. 1735 */ 1736 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) 1737 { 1738 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); 1739 #ifdef CONFIG_NETPOLL_TRAP 1740 if (netpoll_trap()) 1741 return; 1742 #endif 1743 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) 1744 __netif_schedule(txq->qdisc); 1745 } 1746 1747 /* 1748 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used 1749 * as a distribution range limit for the returned value. 1750 */ 1751 static inline u16 skb_tx_hash(const struct net_device *dev, 1752 const struct sk_buff *skb) 1753 { 1754 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); 1755 } 1756 1757 /** 1758 * netif_is_multiqueue - test if device has multiple transmit queues 1759 * @dev: network device 1760 * 1761 * Check if device has multiple transmit queues 1762 */ 1763 static inline int netif_is_multiqueue(const struct net_device *dev) 1764 { 1765 return dev->num_tx_queues > 1; 1766 } 1767 1768 extern int netif_set_real_num_tx_queues(struct net_device *dev, 1769 unsigned int txq); 1770 1771 #ifdef CONFIG_RPS 1772 extern int netif_set_real_num_rx_queues(struct net_device *dev, 1773 unsigned int rxq); 1774 #else 1775 static inline int netif_set_real_num_rx_queues(struct net_device *dev, 1776 unsigned int rxq) 1777 { 1778 return 0; 1779 } 1780 #endif 1781 1782 static inline int netif_copy_real_num_queues(struct net_device *to_dev, 1783 const struct net_device *from_dev) 1784 { 1785 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues); 1786 #ifdef CONFIG_RPS 1787 return netif_set_real_num_rx_queues(to_dev, 1788 from_dev->real_num_rx_queues); 1789 #else 1790 return 0; 1791 #endif 1792 } 1793 1794 /* Use this variant when it is known for sure that it 1795 * is executing from hardware interrupt context or with hardware interrupts 1796 * disabled. 1797 */ 1798 extern void dev_kfree_skb_irq(struct sk_buff *skb); 1799 1800 /* Use this variant in places where it could be invoked 1801 * from either hardware interrupt or other context, with hardware interrupts 1802 * either disabled or enabled. 1803 */ 1804 extern void dev_kfree_skb_any(struct sk_buff *skb); 1805 1806 #define HAVE_NETIF_RX 1 1807 extern int netif_rx(struct sk_buff *skb); 1808 extern int netif_rx_ni(struct sk_buff *skb); 1809 #define HAVE_NETIF_RECEIVE_SKB 1 1810 extern int netif_receive_skb(struct sk_buff *skb); 1811 extern gro_result_t dev_gro_receive(struct napi_struct *napi, 1812 struct sk_buff *skb); 1813 extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); 1814 extern gro_result_t napi_gro_receive(struct napi_struct *napi, 1815 struct sk_buff *skb); 1816 extern void napi_gro_flush(struct napi_struct *napi); 1817 extern struct sk_buff * napi_get_frags(struct napi_struct *napi); 1818 extern gro_result_t napi_frags_finish(struct napi_struct *napi, 1819 struct sk_buff *skb, 1820 gro_result_t ret); 1821 extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); 1822 extern gro_result_t napi_gro_frags(struct napi_struct *napi); 1823 1824 static inline void napi_free_frags(struct napi_struct *napi) 1825 { 1826 kfree_skb(napi->skb); 1827 napi->skb = NULL; 1828 } 1829 1830 extern int netdev_rx_handler_register(struct net_device *dev, 1831 rx_handler_func_t *rx_handler, 1832 void *rx_handler_data); 1833 extern void netdev_rx_handler_unregister(struct net_device *dev); 1834 1835 extern int dev_valid_name(const char *name); 1836 extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); 1837 extern int dev_ethtool(struct net *net, struct ifreq *); 1838 extern unsigned dev_get_flags(const struct net_device *); 1839 extern int __dev_change_flags(struct net_device *, unsigned int flags); 1840 extern int dev_change_flags(struct net_device *, unsigned); 1841 extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); 1842 extern int dev_change_name(struct net_device *, const char *); 1843 extern int dev_set_alias(struct net_device *, const char *, size_t); 1844 extern int dev_change_net_namespace(struct net_device *, 1845 struct net *, const char *); 1846 extern int dev_set_mtu(struct net_device *, int); 1847 extern int dev_set_mac_address(struct net_device *, 1848 struct sockaddr *); 1849 extern int dev_hard_start_xmit(struct sk_buff *skb, 1850 struct net_device *dev, 1851 struct netdev_queue *txq); 1852 extern int dev_forward_skb(struct net_device *dev, 1853 struct sk_buff *skb); 1854 1855 extern int netdev_budget; 1856 1857 /* Called by rtnetlink.c:rtnl_unlock() */ 1858 extern void netdev_run_todo(void); 1859 1860 /** 1861 * dev_put - release reference to device 1862 * @dev: network device 1863 * 1864 * Release reference to device to allow it to be freed. 1865 */ 1866 static inline void dev_put(struct net_device *dev) 1867 { 1868 irqsafe_cpu_dec(*dev->pcpu_refcnt); 1869 } 1870 1871 /** 1872 * dev_hold - get reference to device 1873 * @dev: network device 1874 * 1875 * Hold reference to device to keep it from being freed. 1876 */ 1877 static inline void dev_hold(struct net_device *dev) 1878 { 1879 irqsafe_cpu_inc(*dev->pcpu_refcnt); 1880 } 1881 1882 /* Carrier loss detection, dial on demand. The functions netif_carrier_on 1883 * and _off may be called from IRQ context, but it is caller 1884 * who is responsible for serialization of these calls. 1885 * 1886 * The name carrier is inappropriate, these functions should really be 1887 * called netif_lowerlayer_*() because they represent the state of any 1888 * kind of lower layer not just hardware media. 1889 */ 1890 1891 extern void linkwatch_fire_event(struct net_device *dev); 1892 extern void linkwatch_forget_dev(struct net_device *dev); 1893 1894 /** 1895 * netif_carrier_ok - test if carrier present 1896 * @dev: network device 1897 * 1898 * Check if carrier is present on device 1899 */ 1900 static inline int netif_carrier_ok(const struct net_device *dev) 1901 { 1902 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); 1903 } 1904 1905 extern unsigned long dev_trans_start(struct net_device *dev); 1906 1907 extern void __netdev_watchdog_up(struct net_device *dev); 1908 1909 extern void netif_carrier_on(struct net_device *dev); 1910 1911 extern void netif_carrier_off(struct net_device *dev); 1912 1913 extern void netif_notify_peers(struct net_device *dev); 1914 1915 /** 1916 * netif_dormant_on - mark device as dormant. 1917 * @dev: network device 1918 * 1919 * Mark device as dormant (as per RFC2863). 1920 * 1921 * The dormant state indicates that the relevant interface is not 1922 * actually in a condition to pass packets (i.e., it is not 'up') but is 1923 * in a "pending" state, waiting for some external event. For "on- 1924 * demand" interfaces, this new state identifies the situation where the 1925 * interface is waiting for events to place it in the up state. 1926 * 1927 */ 1928 static inline void netif_dormant_on(struct net_device *dev) 1929 { 1930 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) 1931 linkwatch_fire_event(dev); 1932 } 1933 1934 /** 1935 * netif_dormant_off - set device as not dormant. 1936 * @dev: network device 1937 * 1938 * Device is not in dormant state. 1939 */ 1940 static inline void netif_dormant_off(struct net_device *dev) 1941 { 1942 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) 1943 linkwatch_fire_event(dev); 1944 } 1945 1946 /** 1947 * netif_dormant - test if carrier present 1948 * @dev: network device 1949 * 1950 * Check if carrier is present on device 1951 */ 1952 static inline int netif_dormant(const struct net_device *dev) 1953 { 1954 return test_bit(__LINK_STATE_DORMANT, &dev->state); 1955 } 1956 1957 1958 /** 1959 * netif_oper_up - test if device is operational 1960 * @dev: network device 1961 * 1962 * Check if carrier is operational 1963 */ 1964 static inline int netif_oper_up(const struct net_device *dev) 1965 { 1966 return (dev->operstate == IF_OPER_UP || 1967 dev->operstate == IF_OPER_UNKNOWN /* backward compat */); 1968 } 1969 1970 /** 1971 * netif_device_present - is device available or removed 1972 * @dev: network device 1973 * 1974 * Check if device has not been removed from system. 1975 */ 1976 static inline int netif_device_present(struct net_device *dev) 1977 { 1978 return test_bit(__LINK_STATE_PRESENT, &dev->state); 1979 } 1980 1981 extern void netif_device_detach(struct net_device *dev); 1982 1983 extern void netif_device_attach(struct net_device *dev); 1984 1985 /* 1986 * Network interface message level settings 1987 */ 1988 #define HAVE_NETIF_MSG 1 1989 1990 enum { 1991 NETIF_MSG_DRV = 0x0001, 1992 NETIF_MSG_PROBE = 0x0002, 1993 NETIF_MSG_LINK = 0x0004, 1994 NETIF_MSG_TIMER = 0x0008, 1995 NETIF_MSG_IFDOWN = 0x0010, 1996 NETIF_MSG_IFUP = 0x0020, 1997 NETIF_MSG_RX_ERR = 0x0040, 1998 NETIF_MSG_TX_ERR = 0x0080, 1999 NETIF_MSG_TX_QUEUED = 0x0100, 2000 NETIF_MSG_INTR = 0x0200, 2001 NETIF_MSG_TX_DONE = 0x0400, 2002 NETIF_MSG_RX_STATUS = 0x0800, 2003 NETIF_MSG_PKTDATA = 0x1000, 2004 NETIF_MSG_HW = 0x2000, 2005 NETIF_MSG_WOL = 0x4000, 2006 }; 2007 2008 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) 2009 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) 2010 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) 2011 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) 2012 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) 2013 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) 2014 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) 2015 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) 2016 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) 2017 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) 2018 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) 2019 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) 2020 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) 2021 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) 2022 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) 2023 2024 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) 2025 { 2026 /* use default */ 2027 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) 2028 return default_msg_enable_bits; 2029 if (debug_value == 0) /* no output */ 2030 return 0; 2031 /* set low N bits */ 2032 return (1 << debug_value) - 1; 2033 } 2034 2035 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) 2036 { 2037 spin_lock(&txq->_xmit_lock); 2038 txq->xmit_lock_owner = cpu; 2039 } 2040 2041 static inline void __netif_tx_lock_bh(struct netdev_queue *txq) 2042 { 2043 spin_lock_bh(&txq->_xmit_lock); 2044 txq->xmit_lock_owner = smp_processor_id(); 2045 } 2046 2047 static inline int __netif_tx_trylock(struct netdev_queue *txq) 2048 { 2049 int ok = spin_trylock(&txq->_xmit_lock); 2050 if (likely(ok)) 2051 txq->xmit_lock_owner = smp_processor_id(); 2052 return ok; 2053 } 2054 2055 static inline void __netif_tx_unlock(struct netdev_queue *txq) 2056 { 2057 txq->xmit_lock_owner = -1; 2058 spin_unlock(&txq->_xmit_lock); 2059 } 2060 2061 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) 2062 { 2063 txq->xmit_lock_owner = -1; 2064 spin_unlock_bh(&txq->_xmit_lock); 2065 } 2066 2067 static inline void txq_trans_update(struct netdev_queue *txq) 2068 { 2069 if (txq->xmit_lock_owner != -1) 2070 txq->trans_start = jiffies; 2071 } 2072 2073 /** 2074 * netif_tx_lock - grab network device transmit lock 2075 * @dev: network device 2076 * 2077 * Get network device transmit lock 2078 */ 2079 static inline void netif_tx_lock(struct net_device *dev) 2080 { 2081 unsigned int i; 2082 int cpu; 2083 2084 spin_lock(&dev->tx_global_lock); 2085 cpu = smp_processor_id(); 2086 for (i = 0; i < dev->num_tx_queues; i++) { 2087 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 2088 2089 /* We are the only thread of execution doing a 2090 * freeze, but we have to grab the _xmit_lock in 2091 * order to synchronize with threads which are in 2092 * the ->hard_start_xmit() handler and already 2093 * checked the frozen bit. 2094 */ 2095 __netif_tx_lock(txq, cpu); 2096 set_bit(__QUEUE_STATE_FROZEN, &txq->state); 2097 __netif_tx_unlock(txq); 2098 } 2099 } 2100 2101 static inline void netif_tx_lock_bh(struct net_device *dev) 2102 { 2103 local_bh_disable(); 2104 netif_tx_lock(dev); 2105 } 2106 2107 static inline void netif_tx_unlock(struct net_device *dev) 2108 { 2109 unsigned int i; 2110 2111 for (i = 0; i < dev->num_tx_queues; i++) { 2112 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 2113 2114 /* No need to grab the _xmit_lock here. If the 2115 * queue is not stopped for another reason, we 2116 * force a schedule. 2117 */ 2118 clear_bit(__QUEUE_STATE_FROZEN, &txq->state); 2119 netif_schedule_queue(txq); 2120 } 2121 spin_unlock(&dev->tx_global_lock); 2122 } 2123 2124 static inline void netif_tx_unlock_bh(struct net_device *dev) 2125 { 2126 netif_tx_unlock(dev); 2127 local_bh_enable(); 2128 } 2129 2130 #define HARD_TX_LOCK(dev, txq, cpu) { \ 2131 if ((dev->features & NETIF_F_LLTX) == 0) { \ 2132 __netif_tx_lock(txq, cpu); \ 2133 } \ 2134 } 2135 2136 #define HARD_TX_UNLOCK(dev, txq) { \ 2137 if ((dev->features & NETIF_F_LLTX) == 0) { \ 2138 __netif_tx_unlock(txq); \ 2139 } \ 2140 } 2141 2142 static inline void netif_tx_disable(struct net_device *dev) 2143 { 2144 unsigned int i; 2145 int cpu; 2146 2147 local_bh_disable(); 2148 cpu = smp_processor_id(); 2149 for (i = 0; i < dev->num_tx_queues; i++) { 2150 struct netdev_queue *txq = netdev_get_tx_queue(dev, i); 2151 2152 __netif_tx_lock(txq, cpu); 2153 netif_tx_stop_queue(txq); 2154 __netif_tx_unlock(txq); 2155 } 2156 local_bh_enable(); 2157 } 2158 2159 static inline void netif_addr_lock(struct net_device *dev) 2160 { 2161 spin_lock(&dev->addr_list_lock); 2162 } 2163 2164 static inline void netif_addr_lock_bh(struct net_device *dev) 2165 { 2166 spin_lock_bh(&dev->addr_list_lock); 2167 } 2168 2169 static inline void netif_addr_unlock(struct net_device *dev) 2170 { 2171 spin_unlock(&dev->addr_list_lock); 2172 } 2173 2174 static inline void netif_addr_unlock_bh(struct net_device *dev) 2175 { 2176 spin_unlock_bh(&dev->addr_list_lock); 2177 } 2178 2179 /* 2180 * dev_addrs walker. Should be used only for read access. Call with 2181 * rcu_read_lock held. 2182 */ 2183 #define for_each_dev_addr(dev, ha) \ 2184 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) 2185 2186 /* These functions live elsewhere (drivers/net/net_init.c, but related) */ 2187 2188 extern void ether_setup(struct net_device *dev); 2189 2190 /* Support for loadable net-drivers */ 2191 extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, 2192 void (*setup)(struct net_device *), 2193 unsigned int txqs, unsigned int rxqs); 2194 #define alloc_netdev(sizeof_priv, name, setup) \ 2195 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) 2196 2197 #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ 2198 alloc_netdev_mqs(sizeof_priv, name, setup, count, count) 2199 2200 extern int register_netdev(struct net_device *dev); 2201 extern void unregister_netdev(struct net_device *dev); 2202 2203 /* General hardware address lists handling functions */ 2204 extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, 2205 struct netdev_hw_addr_list *from_list, 2206 int addr_len, unsigned char addr_type); 2207 extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, 2208 struct netdev_hw_addr_list *from_list, 2209 int addr_len, unsigned char addr_type); 2210 extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, 2211 struct netdev_hw_addr_list *from_list, 2212 int addr_len); 2213 extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, 2214 struct netdev_hw_addr_list *from_list, 2215 int addr_len); 2216 extern void __hw_addr_flush(struct netdev_hw_addr_list *list); 2217 extern void __hw_addr_init(struct netdev_hw_addr_list *list); 2218 2219 /* Functions used for device addresses handling */ 2220 extern int dev_addr_add(struct net_device *dev, unsigned char *addr, 2221 unsigned char addr_type); 2222 extern int dev_addr_del(struct net_device *dev, unsigned char *addr, 2223 unsigned char addr_type); 2224 extern int dev_addr_add_multiple(struct net_device *to_dev, 2225 struct net_device *from_dev, 2226 unsigned char addr_type); 2227 extern int dev_addr_del_multiple(struct net_device *to_dev, 2228 struct net_device *from_dev, 2229 unsigned char addr_type); 2230 extern void dev_addr_flush(struct net_device *dev); 2231 extern int dev_addr_init(struct net_device *dev); 2232 2233 /* Functions used for unicast addresses handling */ 2234 extern int dev_uc_add(struct net_device *dev, unsigned char *addr); 2235 extern int dev_uc_del(struct net_device *dev, unsigned char *addr); 2236 extern int dev_uc_sync(struct net_device *to, struct net_device *from); 2237 extern void dev_uc_unsync(struct net_device *to, struct net_device *from); 2238 extern void dev_uc_flush(struct net_device *dev); 2239 extern void dev_uc_init(struct net_device *dev); 2240 2241 /* Functions used for multicast addresses handling */ 2242 extern int dev_mc_add(struct net_device *dev, unsigned char *addr); 2243 extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); 2244 extern int dev_mc_del(struct net_device *dev, unsigned char *addr); 2245 extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); 2246 extern int dev_mc_sync(struct net_device *to, struct net_device *from); 2247 extern void dev_mc_unsync(struct net_device *to, struct net_device *from); 2248 extern void dev_mc_flush(struct net_device *dev); 2249 extern void dev_mc_init(struct net_device *dev); 2250 2251 /* Functions used for secondary unicast and multicast support */ 2252 extern void dev_set_rx_mode(struct net_device *dev); 2253 extern void __dev_set_rx_mode(struct net_device *dev); 2254 extern int dev_set_promiscuity(struct net_device *dev, int inc); 2255 extern int dev_set_allmulti(struct net_device *dev, int inc); 2256 extern void netdev_state_change(struct net_device *dev); 2257 extern int netdev_bonding_change(struct net_device *dev, 2258 unsigned long event); 2259 extern void netdev_features_change(struct net_device *dev); 2260 /* Load a device via the kmod */ 2261 extern void dev_load(struct net *net, const char *name); 2262 extern void dev_mcast_init(void); 2263 extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, 2264 struct rtnl_link_stats64 *storage); 2265 2266 extern int netdev_max_backlog; 2267 extern int netdev_tstamp_prequeue; 2268 extern int weight_p; 2269 extern int netdev_set_master(struct net_device *dev, struct net_device *master); 2270 extern int skb_checksum_help(struct sk_buff *skb); 2271 extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); 2272 #ifdef CONFIG_BUG 2273 extern void netdev_rx_csum_fault(struct net_device *dev); 2274 #else 2275 static inline void netdev_rx_csum_fault(struct net_device *dev) 2276 { 2277 } 2278 #endif 2279 /* rx skb timestamps */ 2280 extern void net_enable_timestamp(void); 2281 extern void net_disable_timestamp(void); 2282 2283 #ifdef CONFIG_PROC_FS 2284 extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); 2285 extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); 2286 extern void dev_seq_stop(struct seq_file *seq, void *v); 2287 #endif 2288 2289 extern int netdev_class_create_file(struct class_attribute *class_attr); 2290 extern void netdev_class_remove_file(struct class_attribute *class_attr); 2291 2292 extern struct kobj_ns_type_operations net_ns_type_operations; 2293 2294 extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); 2295 2296 extern void linkwatch_run_queue(void); 2297 2298 unsigned long netdev_increment_features(unsigned long all, unsigned long one, 2299 unsigned long mask); 2300 unsigned long netdev_fix_features(unsigned long features, const char *name); 2301 2302 void netif_stacked_transfer_operstate(const struct net_device *rootdev, 2303 struct net_device *dev); 2304 2305 int netif_skb_features(struct sk_buff *skb); 2306 2307 static inline int net_gso_ok(int features, int gso_type) 2308 { 2309 int feature = gso_type << NETIF_F_GSO_SHIFT; 2310 return (features & feature) == feature; 2311 } 2312 2313 static inline int skb_gso_ok(struct sk_buff *skb, int features) 2314 { 2315 return net_gso_ok(features, skb_shinfo(skb)->gso_type) && 2316 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); 2317 } 2318 2319 static inline int netif_needs_gso(struct sk_buff *skb, int features) 2320 { 2321 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || 2322 unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); 2323 } 2324 2325 static inline void netif_set_gso_max_size(struct net_device *dev, 2326 unsigned int size) 2327 { 2328 dev->gso_max_size = size; 2329 } 2330 2331 extern int __skb_bond_should_drop(struct sk_buff *skb, 2332 struct net_device *master); 2333 2334 static inline int skb_bond_should_drop(struct sk_buff *skb, 2335 struct net_device *master) 2336 { 2337 if (master) 2338 return __skb_bond_should_drop(skb, master); 2339 return 0; 2340 } 2341 2342 extern struct pernet_operations __net_initdata loopback_net_ops; 2343 2344 static inline int dev_ethtool_get_settings(struct net_device *dev, 2345 struct ethtool_cmd *cmd) 2346 { 2347 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) 2348 return -EOPNOTSUPP; 2349 return dev->ethtool_ops->get_settings(dev, cmd); 2350 } 2351 2352 static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) 2353 { 2354 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) 2355 return 0; 2356 return dev->ethtool_ops->get_rx_csum(dev); 2357 } 2358 2359 static inline u32 dev_ethtool_get_flags(struct net_device *dev) 2360 { 2361 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) 2362 return 0; 2363 return dev->ethtool_ops->get_flags(dev); 2364 } 2365 2366 /* Logging, debugging and troubleshooting/diagnostic helpers. */ 2367 2368 /* netdev_printk helpers, similar to dev_printk */ 2369 2370 static inline const char *netdev_name(const struct net_device *dev) 2371 { 2372 if (dev->reg_state != NETREG_REGISTERED) 2373 return "(unregistered net_device)"; 2374 return dev->name; 2375 } 2376 2377 extern int netdev_printk(const char *level, const struct net_device *dev, 2378 const char *format, ...) 2379 __attribute__ ((format (printf, 3, 4))); 2380 extern int netdev_emerg(const struct net_device *dev, const char *format, ...) 2381 __attribute__ ((format (printf, 2, 3))); 2382 extern int netdev_alert(const struct net_device *dev, const char *format, ...) 2383 __attribute__ ((format (printf, 2, 3))); 2384 extern int netdev_crit(const struct net_device *dev, const char *format, ...) 2385 __attribute__ ((format (printf, 2, 3))); 2386 extern int netdev_err(const struct net_device *dev, const char *format, ...) 2387 __attribute__ ((format (printf, 2, 3))); 2388 extern int netdev_warn(const struct net_device *dev, const char *format, ...) 2389 __attribute__ ((format (printf, 2, 3))); 2390 extern int netdev_notice(const struct net_device *dev, const char *format, ...) 2391 __attribute__ ((format (printf, 2, 3))); 2392 extern int netdev_info(const struct net_device *dev, const char *format, ...) 2393 __attribute__ ((format (printf, 2, 3))); 2394 2395 #if defined(DEBUG) 2396 #define netdev_dbg(__dev, format, args...) \ 2397 netdev_printk(KERN_DEBUG, __dev, format, ##args) 2398 #elif defined(CONFIG_DYNAMIC_DEBUG) 2399 #define netdev_dbg(__dev, format, args...) \ 2400 do { \ 2401 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \ 2402 netdev_name(__dev), ##args); \ 2403 } while (0) 2404 #else 2405 #define netdev_dbg(__dev, format, args...) \ 2406 ({ \ 2407 if (0) \ 2408 netdev_printk(KERN_DEBUG, __dev, format, ##args); \ 2409 0; \ 2410 }) 2411 #endif 2412 2413 #if defined(VERBOSE_DEBUG) 2414 #define netdev_vdbg netdev_dbg 2415 #else 2416 2417 #define netdev_vdbg(dev, format, args...) \ 2418 ({ \ 2419 if (0) \ 2420 netdev_printk(KERN_DEBUG, dev, format, ##args); \ 2421 0; \ 2422 }) 2423 #endif 2424 2425 /* 2426 * netdev_WARN() acts like dev_printk(), but with the key difference 2427 * of using a WARN/WARN_ON to get the message out, including the 2428 * file/line information and a backtrace. 2429 */ 2430 #define netdev_WARN(dev, format, args...) \ 2431 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); 2432 2433 /* netif printk helpers, similar to netdev_printk */ 2434 2435 #define netif_printk(priv, type, level, dev, fmt, args...) \ 2436 do { \ 2437 if (netif_msg_##type(priv)) \ 2438 netdev_printk(level, (dev), fmt, ##args); \ 2439 } while (0) 2440 2441 #define netif_level(level, priv, type, dev, fmt, args...) \ 2442 do { \ 2443 if (netif_msg_##type(priv)) \ 2444 netdev_##level(dev, fmt, ##args); \ 2445 } while (0) 2446 2447 #define netif_emerg(priv, type, dev, fmt, args...) \ 2448 netif_level(emerg, priv, type, dev, fmt, ##args) 2449 #define netif_alert(priv, type, dev, fmt, args...) \ 2450 netif_level(alert, priv, type, dev, fmt, ##args) 2451 #define netif_crit(priv, type, dev, fmt, args...) \ 2452 netif_level(crit, priv, type, dev, fmt, ##args) 2453 #define netif_err(priv, type, dev, fmt, args...) \ 2454 netif_level(err, priv, type, dev, fmt, ##args) 2455 #define netif_warn(priv, type, dev, fmt, args...) \ 2456 netif_level(warn, priv, type, dev, fmt, ##args) 2457 #define netif_notice(priv, type, dev, fmt, args...) \ 2458 netif_level(notice, priv, type, dev, fmt, ##args) 2459 #define netif_info(priv, type, dev, fmt, args...) \ 2460 netif_level(info, priv, type, dev, fmt, ##args) 2461 2462 #if defined(DEBUG) 2463 #define netif_dbg(priv, type, dev, format, args...) \ 2464 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) 2465 #elif defined(CONFIG_DYNAMIC_DEBUG) 2466 #define netif_dbg(priv, type, netdev, format, args...) \ 2467 do { \ 2468 if (netif_msg_##type(priv)) \ 2469 dynamic_dev_dbg((netdev)->dev.parent, \ 2470 "%s: " format, \ 2471 netdev_name(netdev), ##args); \ 2472 } while (0) 2473 #else 2474 #define netif_dbg(priv, type, dev, format, args...) \ 2475 ({ \ 2476 if (0) \ 2477 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ 2478 0; \ 2479 }) 2480 #endif 2481 2482 #if defined(VERBOSE_DEBUG) 2483 #define netif_vdbg netif_dbg 2484 #else 2485 #define netif_vdbg(priv, type, dev, format, args...) \ 2486 ({ \ 2487 if (0) \ 2488 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ 2489 0; \ 2490 }) 2491 #endif 2492 2493 #endif /* __KERNEL__ */ 2494 2495 #endif /* _LINUX_NETDEVICE_H */ 2496