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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * INET An implementation of the TCP/IP protocol suite for the LINUX4 * operating system. INET is implemented using the BSD Socket5 * interface as the means of communication with the user level.6 *7 * Definitions for the Interfaces handler.8 *9 * Version: @(#)dev.h 1.0.10 08/12/9310 *11 * Authors: Ross Biro12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>13 * Corey Minyard <wf-rch!minyard@relay.EU.net>14 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>15 * Alan Cox, <alan@lxorguk.ukuu.org.uk>16 * Bjorn Ekwall. <bj0rn@blox.se>17 * Pekka Riikonen <priikone@poseidon.pspt.fi>18 *19 * Moved to /usr/include/linux for NET320 */21#ifndef _LINUX_NETDEVICE_H22#define _LINUX_NETDEVICE_H23 24#include <linux/timer.h>25#include <linux/bug.h>26#include <linux/delay.h>27#include <linux/atomic.h>28#include <linux/prefetch.h>29#include <asm/cache.h>30#include <asm/byteorder.h>31#include <asm/local.h>32 33#include <linux/percpu.h>34#include <linux/rculist.h>35#include <linux/workqueue.h>36#include <linux/dynamic_queue_limits.h>37 38#include <net/net_namespace.h>39#ifdef CONFIG_DCB40#include <net/dcbnl.h>41#endif42#include <net/netprio_cgroup.h>43#include <linux/netdev_features.h>44#include <linux/neighbour.h>45#include <linux/netdevice_xmit.h>46#include <uapi/linux/netdevice.h>47#include <uapi/linux/if_bonding.h>48#include <uapi/linux/pkt_cls.h>49#include <uapi/linux/netdev.h>50#include <linux/hashtable.h>51#include <linux/rbtree.h>52#include <net/net_trackers.h>53#include <net/net_debug.h>54#include <net/dropreason-core.h>55 56struct netpoll_info;57struct device;58struct ethtool_ops;59struct kernel_hwtstamp_config;60struct phy_device;61struct dsa_port;62struct ip_tunnel_parm_kern;63struct macsec_context;64struct macsec_ops;65struct netdev_name_node;66struct sd_flow_limit;67struct sfp_bus;68/* 802.11 specific */69struct wireless_dev;70/* 802.15.4 specific */71struct wpan_dev;72struct mpls_dev;73/* UDP Tunnel offloads */74struct udp_tunnel_info;75struct udp_tunnel_nic_info;76struct udp_tunnel_nic;77struct bpf_prog;78struct xdp_buff;79struct xdp_frame;80struct xdp_metadata_ops;81struct xdp_md;82struct ethtool_netdev_state;83struct phy_link_topology;84 85typedef u32 xdp_features_t;86 87void synchronize_net(void);88void netdev_set_default_ethtool_ops(struct net_device *dev,89 const struct ethtool_ops *ops);90void netdev_sw_irq_coalesce_default_on(struct net_device *dev);91 92/* Backlog congestion levels */93#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */94#define NET_RX_DROP 1 /* packet dropped */95 96#define MAX_NEST_DEV 897 98/*99 * Transmit return codes: transmit return codes originate from three different100 * namespaces:101 *102 * - qdisc return codes103 * - driver transmit return codes104 * - errno values105 *106 * Drivers are allowed to return any one of those in their hard_start_xmit()107 * function. Real network devices commonly used with qdiscs should only return108 * the driver transmit return codes though - when qdiscs are used, the actual109 * transmission happens asynchronously, so the value is not propagated to110 * higher layers. Virtual network devices transmit synchronously; in this case111 * the driver transmit return codes are consumed by dev_queue_xmit(), and all112 * others are propagated to higher layers.113 */114 115/* qdisc ->enqueue() return codes. */116#define NET_XMIT_SUCCESS 0x00117#define NET_XMIT_DROP 0x01 /* skb dropped */118#define NET_XMIT_CN 0x02 /* congestion notification */119#define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */120 121/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It122 * indicates that the device will soon be dropping packets, or already drops123 * some packets of the same priority; prompting us to send less aggressively. */124#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))125#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)126 127/* Driver transmit return codes */128#define NETDEV_TX_MASK 0xf0129 130enum netdev_tx {131 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */132 NETDEV_TX_OK = 0x00, /* driver took care of packet */133 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/134};135typedef enum netdev_tx netdev_tx_t;136 137/*138 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;139 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.140 */141static inline bool dev_xmit_complete(int rc)142{143 /*144 * Positive cases with an skb consumed by a driver:145 * - successful transmission (rc == NETDEV_TX_OK)146 * - error while transmitting (rc < 0)147 * - error while queueing to a different device (rc & NET_XMIT_MASK)148 */149 if (likely(rc < NET_XMIT_MASK))150 return true;151 152 return false;153}154 155/*156 * Compute the worst-case header length according to the protocols157 * used.158 */159 160#if defined(CONFIG_HYPERV_NET)161# define LL_MAX_HEADER 128162#elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)163# if defined(CONFIG_MAC80211_MESH)164# define LL_MAX_HEADER 128165# else166# define LL_MAX_HEADER 96167# endif168#else169# define LL_MAX_HEADER 32170#endif171 172#if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \173 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)174#define MAX_HEADER LL_MAX_HEADER175#else176#define MAX_HEADER (LL_MAX_HEADER + 48)177#endif178 179/*180 * Old network device statistics. Fields are native words181 * (unsigned long) so they can be read and written atomically.182 */183 184#define NET_DEV_STAT(FIELD) \185 union { \186 unsigned long FIELD; \187 atomic_long_t __##FIELD; \188 }189 190struct net_device_stats {191 NET_DEV_STAT(rx_packets);192 NET_DEV_STAT(tx_packets);193 NET_DEV_STAT(rx_bytes);194 NET_DEV_STAT(tx_bytes);195 NET_DEV_STAT(rx_errors);196 NET_DEV_STAT(tx_errors);197 NET_DEV_STAT(rx_dropped);198 NET_DEV_STAT(tx_dropped);199 NET_DEV_STAT(multicast);200 NET_DEV_STAT(collisions);201 NET_DEV_STAT(rx_length_errors);202 NET_DEV_STAT(rx_over_errors);203 NET_DEV_STAT(rx_crc_errors);204 NET_DEV_STAT(rx_frame_errors);205 NET_DEV_STAT(rx_fifo_errors);206 NET_DEV_STAT(rx_missed_errors);207 NET_DEV_STAT(tx_aborted_errors);208 NET_DEV_STAT(tx_carrier_errors);209 NET_DEV_STAT(tx_fifo_errors);210 NET_DEV_STAT(tx_heartbeat_errors);211 NET_DEV_STAT(tx_window_errors);212 NET_DEV_STAT(rx_compressed);213 NET_DEV_STAT(tx_compressed);214};215#undef NET_DEV_STAT216 217/* per-cpu stats, allocated on demand.218 * Try to fit them in a single cache line, for dev_get_stats() sake.219 */220struct net_device_core_stats {221 unsigned long rx_dropped;222 unsigned long tx_dropped;223 unsigned long rx_nohandler;224 unsigned long rx_otherhost_dropped;225} __aligned(4 * sizeof(unsigned long));226 227#include <linux/cache.h>228#include <linux/skbuff.h>229 230struct neighbour;231struct neigh_parms;232struct sk_buff;233 234struct netdev_hw_addr {235 struct list_head list;236 struct rb_node node;237 unsigned char addr[MAX_ADDR_LEN];238 unsigned char type;239#define NETDEV_HW_ADDR_T_LAN 1240#define NETDEV_HW_ADDR_T_SAN 2241#define NETDEV_HW_ADDR_T_UNICAST 3242#define NETDEV_HW_ADDR_T_MULTICAST 4243 bool global_use;244 int sync_cnt;245 int refcount;246 int synced;247 struct rcu_head rcu_head;248};249 250struct netdev_hw_addr_list {251 struct list_head list;252 int count;253 254 /* Auxiliary tree for faster lookup on addition and deletion */255 struct rb_root tree;256};257 258#define netdev_hw_addr_list_count(l) ((l)->count)259#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)260#define netdev_hw_addr_list_for_each(ha, l) \261 list_for_each_entry(ha, &(l)->list, list)262 263#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)264#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)265#define netdev_for_each_uc_addr(ha, dev) \266 netdev_hw_addr_list_for_each(ha, &(dev)->uc)267#define netdev_for_each_synced_uc_addr(_ha, _dev) \268 netdev_for_each_uc_addr((_ha), (_dev)) \269 if ((_ha)->sync_cnt)270 271#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)272#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)273#define netdev_for_each_mc_addr(ha, dev) \274 netdev_hw_addr_list_for_each(ha, &(dev)->mc)275#define netdev_for_each_synced_mc_addr(_ha, _dev) \276 netdev_for_each_mc_addr((_ha), (_dev)) \277 if ((_ha)->sync_cnt)278 279struct hh_cache {280 unsigned int hh_len;281 seqlock_t hh_lock;282 283 /* cached hardware header; allow for machine alignment needs. */284#define HH_DATA_MOD 16285#define HH_DATA_OFF(__len) \286 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))287#define HH_DATA_ALIGN(__len) \288 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))289 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];290};291 292/* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.293 * Alternative is:294 * dev->hard_header_len ? (dev->hard_header_len +295 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0296 *297 * We could use other alignment values, but we must maintain the298 * relationship HH alignment <= LL alignment.299 */300#define LL_RESERVED_SPACE(dev) \301 ((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom)) \302 & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)303#define LL_RESERVED_SPACE_EXTRA(dev,extra) \304 ((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom) + (extra)) \305 & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)306 307struct header_ops {308 int (*create) (struct sk_buff *skb, struct net_device *dev,309 unsigned short type, const void *daddr,310 const void *saddr, unsigned int len);311 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);312 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);313 void (*cache_update)(struct hh_cache *hh,314 const struct net_device *dev,315 const unsigned char *haddr);316 bool (*validate)(const char *ll_header, unsigned int len);317 __be16 (*parse_protocol)(const struct sk_buff *skb);318};319 320/* These flag bits are private to the generic network queueing321 * layer; they may not be explicitly referenced by any other322 * code.323 */324 325enum netdev_state_t {326 __LINK_STATE_START,327 __LINK_STATE_PRESENT,328 __LINK_STATE_NOCARRIER,329 __LINK_STATE_LINKWATCH_PENDING,330 __LINK_STATE_DORMANT,331 __LINK_STATE_TESTING,332};333 334struct gro_list {335 struct list_head list;336 int count;337};338 339/*340 * size of gro hash buckets, must less than bit number of341 * napi_struct::gro_bitmask342 */343#define GRO_HASH_BUCKETS 8344 345/*346 * Structure for NAPI scheduling similar to tasklet but with weighting347 */348struct napi_struct {349 /* The poll_list must only be managed by the entity which350 * changes the state of the NAPI_STATE_SCHED bit. This means351 * whoever atomically sets that bit can add this napi_struct352 * to the per-CPU poll_list, and whoever clears that bit353 * can remove from the list right before clearing the bit.354 */355 struct list_head poll_list;356 357 unsigned long state;358 int weight;359 u32 defer_hard_irqs_count;360 unsigned long gro_bitmask;361 int (*poll)(struct napi_struct *, int);362#ifdef CONFIG_NETPOLL363 /* CPU actively polling if netpoll is configured */364 int poll_owner;365#endif366 /* CPU on which NAPI has been scheduled for processing */367 int list_owner;368 struct net_device *dev;369 struct gro_list gro_hash[GRO_HASH_BUCKETS];370 struct sk_buff *skb;371 struct list_head rx_list; /* Pending GRO_NORMAL skbs */372 int rx_count; /* length of rx_list */373 unsigned int napi_id;374 struct hrtimer timer;375 struct task_struct *thread;376 /* control-path-only fields follow */377 struct list_head dev_list;378 struct hlist_node napi_hash_node;379 int irq;380};381 382enum {383 NAPI_STATE_SCHED, /* Poll is scheduled */384 NAPI_STATE_MISSED, /* reschedule a napi */385 NAPI_STATE_DISABLE, /* Disable pending */386 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */387 NAPI_STATE_LISTED, /* NAPI added to system lists */388 NAPI_STATE_NO_BUSY_POLL, /* Do not add in napi_hash, no busy polling */389 NAPI_STATE_IN_BUSY_POLL, /* sk_busy_loop() owns this NAPI */390 NAPI_STATE_PREFER_BUSY_POLL, /* prefer busy-polling over softirq processing*/391 NAPI_STATE_THREADED, /* The poll is performed inside its own thread*/392 NAPI_STATE_SCHED_THREADED, /* Napi is currently scheduled in threaded mode */393};394 395enum {396 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),397 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),398 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),399 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),400 NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED),401 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),402 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),403 NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL),404 NAPIF_STATE_THREADED = BIT(NAPI_STATE_THREADED),405 NAPIF_STATE_SCHED_THREADED = BIT(NAPI_STATE_SCHED_THREADED),406};407 408enum gro_result {409 GRO_MERGED,410 GRO_MERGED_FREE,411 GRO_HELD,412 GRO_NORMAL,413 GRO_CONSUMED,414};415typedef enum gro_result gro_result_t;416 417/*418 * enum rx_handler_result - Possible return values for rx_handlers.419 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it420 * further.421 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in422 * case skb->dev was changed by rx_handler.423 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.424 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.425 *426 * rx_handlers are functions called from inside __netif_receive_skb(), to do427 * special processing of the skb, prior to delivery to protocol handlers.428 *429 * Currently, a net_device can only have a single rx_handler registered. Trying430 * to register a second rx_handler will return -EBUSY.431 *432 * To register a rx_handler on a net_device, use netdev_rx_handler_register().433 * To unregister a rx_handler on a net_device, use434 * netdev_rx_handler_unregister().435 *436 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to437 * do with the skb.438 *439 * If the rx_handler consumed the skb in some way, it should return440 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for441 * the skb to be delivered in some other way.442 *443 * If the rx_handler changed skb->dev, to divert the skb to another444 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the445 * new device will be called if it exists.446 *447 * If the rx_handler decides the skb should be ignored, it should return448 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that449 * are registered on exact device (ptype->dev == skb->dev).450 *451 * If the rx_handler didn't change skb->dev, but wants the skb to be normally452 * delivered, it should return RX_HANDLER_PASS.453 *454 * A device without a registered rx_handler will behave as if rx_handler455 * returned RX_HANDLER_PASS.456 */457 458enum rx_handler_result {459 RX_HANDLER_CONSUMED,460 RX_HANDLER_ANOTHER,461 RX_HANDLER_EXACT,462 RX_HANDLER_PASS,463};464typedef enum rx_handler_result rx_handler_result_t;465typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);466 467void __napi_schedule(struct napi_struct *n);468void __napi_schedule_irqoff(struct napi_struct *n);469 470static inline bool napi_disable_pending(struct napi_struct *n)471{472 return test_bit(NAPI_STATE_DISABLE, &n->state);473}474 475static inline bool napi_prefer_busy_poll(struct napi_struct *n)476{477 return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state);478}479 480/**481 * napi_is_scheduled - test if NAPI is scheduled482 * @n: NAPI context483 *484 * This check is "best-effort". With no locking implemented,485 * a NAPI can be scheduled or terminate right after this check486 * and produce not precise results.487 *488 * NAPI_STATE_SCHED is an internal state, napi_is_scheduled489 * should not be used normally and napi_schedule should be490 * used instead.491 *492 * Use only if the driver really needs to check if a NAPI493 * is scheduled for example in the context of delayed timer494 * that can be skipped if a NAPI is already scheduled.495 *496 * Return True if NAPI is scheduled, False otherwise.497 */498static inline bool napi_is_scheduled(struct napi_struct *n)499{500 return test_bit(NAPI_STATE_SCHED, &n->state);501}502 503bool napi_schedule_prep(struct napi_struct *n);504 505/**506 * napi_schedule - schedule NAPI poll507 * @n: NAPI context508 *509 * Schedule NAPI poll routine to be called if it is not already510 * running.511 * Return true if we schedule a NAPI or false if not.512 * Refer to napi_schedule_prep() for additional reason on why513 * a NAPI might not be scheduled.514 */515static inline bool napi_schedule(struct napi_struct *n)516{517 if (napi_schedule_prep(n)) {518 __napi_schedule(n);519 return true;520 }521 522 return false;523}524 525/**526 * napi_schedule_irqoff - schedule NAPI poll527 * @n: NAPI context528 *529 * Variant of napi_schedule(), assuming hard irqs are masked.530 */531static inline void napi_schedule_irqoff(struct napi_struct *n)532{533 if (napi_schedule_prep(n))534 __napi_schedule_irqoff(n);535}536 537/**538 * napi_complete_done - NAPI processing complete539 * @n: NAPI context540 * @work_done: number of packets processed541 *542 * Mark NAPI processing as complete. Should only be called if poll budget543 * has not been completely consumed.544 * Prefer over napi_complete().545 * Return false if device should avoid rearming interrupts.546 */547bool napi_complete_done(struct napi_struct *n, int work_done);548 549static inline bool napi_complete(struct napi_struct *n)550{551 return napi_complete_done(n, 0);552}553 554int dev_set_threaded(struct net_device *dev, bool threaded);555 556/**557 * napi_disable - prevent NAPI from scheduling558 * @n: NAPI context559 *560 * Stop NAPI from being scheduled on this context.561 * Waits till any outstanding processing completes.562 */563void napi_disable(struct napi_struct *n);564 565void napi_enable(struct napi_struct *n);566 567/**568 * napi_synchronize - wait until NAPI is not running569 * @n: NAPI context570 *571 * Wait until NAPI is done being scheduled on this context.572 * Waits till any outstanding processing completes but573 * does not disable future activations.574 */575static inline void napi_synchronize(const struct napi_struct *n)576{577 if (IS_ENABLED(CONFIG_SMP))578 while (test_bit(NAPI_STATE_SCHED, &n->state))579 msleep(1);580 else581 barrier();582}583 584/**585 * napi_if_scheduled_mark_missed - if napi is running, set the586 * NAPIF_STATE_MISSED587 * @n: NAPI context588 *589 * If napi is running, set the NAPIF_STATE_MISSED, and return true if590 * NAPI is scheduled.591 **/592static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)593{594 unsigned long val, new;595 596 val = READ_ONCE(n->state);597 do {598 if (val & NAPIF_STATE_DISABLE)599 return true;600 601 if (!(val & NAPIF_STATE_SCHED))602 return false;603 604 new = val | NAPIF_STATE_MISSED;605 } while (!try_cmpxchg(&n->state, &val, new));606 607 return true;608}609 610enum netdev_queue_state_t {611 __QUEUE_STATE_DRV_XOFF,612 __QUEUE_STATE_STACK_XOFF,613 __QUEUE_STATE_FROZEN,614};615 616#define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)617#define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)618#define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)619 620#define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)621#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \622 QUEUE_STATE_FROZEN)623#define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \624 QUEUE_STATE_FROZEN)625 626/*627 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The628 * netif_tx_* functions below are used to manipulate this flag. The629 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit630 * queue independently. The netif_xmit_*stopped functions below are called631 * to check if the queue has been stopped by the driver or stack (either632 * of the XOFF bits are set in the state). Drivers should not need to call633 * netif_xmit*stopped functions, they should only be using netif_tx_*.634 */635 636struct netdev_queue {637/*638 * read-mostly part639 */640 struct net_device *dev;641 netdevice_tracker dev_tracker;642 643 struct Qdisc __rcu *qdisc;644 struct Qdisc __rcu *qdisc_sleeping;645#ifdef CONFIG_SYSFS646 struct kobject kobj;647#endif648 unsigned long tx_maxrate;649 /*650 * Number of TX timeouts for this queue651 * (/sys/class/net/DEV/Q/trans_timeout)652 */653 atomic_long_t trans_timeout;654 655 /* Subordinate device that the queue has been assigned to */656 struct net_device *sb_dev;657#ifdef CONFIG_XDP_SOCKETS658 struct xsk_buff_pool *pool;659#endif660 661/*662 * write-mostly part663 */664#ifdef CONFIG_BQL665 struct dql dql;666#endif667 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;668 int xmit_lock_owner;669 /*670 * Time (in jiffies) of last Tx671 */672 unsigned long trans_start;673 674 unsigned long state;675 676/*677 * slow- / control-path part678 */679 /* NAPI instance for the queue680 * Readers and writers must hold RTNL681 */682 struct napi_struct *napi;683 684#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)685 int numa_node;686#endif687} ____cacheline_aligned_in_smp;688 689extern int sysctl_fb_tunnels_only_for_init_net;690extern int sysctl_devconf_inherit_init_net;691 692/*693 * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns694 * == 1 : For initns only695 * == 2 : For none.696 */697static inline bool net_has_fallback_tunnels(const struct net *net)698{699#if IS_ENABLED(CONFIG_SYSCTL)700 int fb_tunnels_only_for_init_net = READ_ONCE(sysctl_fb_tunnels_only_for_init_net);701 702 return !fb_tunnels_only_for_init_net ||703 (net_eq(net, &init_net) && fb_tunnels_only_for_init_net == 1);704#else705 return true;706#endif707}708 709static inline int net_inherit_devconf(void)710{711#if IS_ENABLED(CONFIG_SYSCTL)712 return READ_ONCE(sysctl_devconf_inherit_init_net);713#else714 return 0;715#endif716}717 718static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)719{720#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)721 return q->numa_node;722#else723 return NUMA_NO_NODE;724#endif725}726 727static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)728{729#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)730 q->numa_node = node;731#endif732}733 734#ifdef CONFIG_RFS_ACCEL735bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,736 u16 filter_id);737#endif738 739/* XPS map type and offset of the xps map within net_device->xps_maps[]. */740enum xps_map_type {741 XPS_CPUS = 0,742 XPS_RXQS,743 XPS_MAPS_MAX,744};745 746#ifdef CONFIG_XPS747/*748 * This structure holds an XPS map which can be of variable length. The749 * map is an array of queues.750 */751struct xps_map {752 unsigned int len;753 unsigned int alloc_len;754 struct rcu_head rcu;755 u16 queues[];756};757#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))758#define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \759 - sizeof(struct xps_map)) / sizeof(u16))760 761/*762 * This structure holds all XPS maps for device. Maps are indexed by CPU.763 *764 * We keep track of the number of cpus/rxqs used when the struct is allocated,765 * in nr_ids. This will help not accessing out-of-bound memory.766 *767 * We keep track of the number of traffic classes used when the struct is768 * allocated, in num_tc. This will be used to navigate the maps, to ensure we're769 * not crossing its upper bound, as the original dev->num_tc can be updated in770 * the meantime.771 */772struct xps_dev_maps {773 struct rcu_head rcu;774 unsigned int nr_ids;775 s16 num_tc;776 struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */777};778 779#define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \780 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))781 782#define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\783 (_rxqs * (_tcs) * sizeof(struct xps_map *)))784 785#endif /* CONFIG_XPS */786 787#define TC_MAX_QUEUE 16788#define TC_BITMASK 15789/* HW offloaded queuing disciplines txq count and offset maps */790struct netdev_tc_txq {791 u16 count;792 u16 offset;793};794 795#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)796/*797 * This structure is to hold information about the device798 * configured to run FCoE protocol stack.799 */800struct netdev_fcoe_hbainfo {801 char manufacturer[64];802 char serial_number[64];803 char hardware_version[64];804 char driver_version[64];805 char optionrom_version[64];806 char firmware_version[64];807 char model[256];808 char model_description[256];809};810#endif811 812#define MAX_PHYS_ITEM_ID_LEN 32813 814/* This structure holds a unique identifier to identify some815 * physical item (port for example) used by a netdevice.816 */817struct netdev_phys_item_id {818 unsigned char id[MAX_PHYS_ITEM_ID_LEN];819 unsigned char id_len;820};821 822static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,823 struct netdev_phys_item_id *b)824{825 return a->id_len == b->id_len &&826 memcmp(a->id, b->id, a->id_len) == 0;827}828 829typedef u16 (*select_queue_fallback_t)(struct net_device *dev,830 struct sk_buff *skb,831 struct net_device *sb_dev);832 833enum net_device_path_type {834 DEV_PATH_ETHERNET = 0,835 DEV_PATH_VLAN,836 DEV_PATH_BRIDGE,837 DEV_PATH_PPPOE,838 DEV_PATH_DSA,839 DEV_PATH_MTK_WDMA,840};841 842struct net_device_path {843 enum net_device_path_type type;844 const struct net_device *dev;845 union {846 struct {847 u16 id;848 __be16 proto;849 u8 h_dest[ETH_ALEN];850 } encap;851 struct {852 enum {853 DEV_PATH_BR_VLAN_KEEP,854 DEV_PATH_BR_VLAN_TAG,855 DEV_PATH_BR_VLAN_UNTAG,856 DEV_PATH_BR_VLAN_UNTAG_HW,857 } vlan_mode;858 u16 vlan_id;859 __be16 vlan_proto;860 } bridge;861 struct {862 int port;863 u16 proto;864 } dsa;865 struct {866 u8 wdma_idx;867 u8 queue;868 u16 wcid;869 u8 bss;870 u8 amsdu;871 } mtk_wdma;872 };873};874 875#define NET_DEVICE_PATH_STACK_MAX 5876#define NET_DEVICE_PATH_VLAN_MAX 2877 878struct net_device_path_stack {879 int num_paths;880 struct net_device_path path[NET_DEVICE_PATH_STACK_MAX];881};882 883struct net_device_path_ctx {884 const struct net_device *dev;885 u8 daddr[ETH_ALEN];886 887 int num_vlans;888 struct {889 u16 id;890 __be16 proto;891 } vlan[NET_DEVICE_PATH_VLAN_MAX];892};893 894enum tc_setup_type {895 TC_QUERY_CAPS,896 TC_SETUP_QDISC_MQPRIO,897 TC_SETUP_CLSU32,898 TC_SETUP_CLSFLOWER,899 TC_SETUP_CLSMATCHALL,900 TC_SETUP_CLSBPF,901 TC_SETUP_BLOCK,902 TC_SETUP_QDISC_CBS,903 TC_SETUP_QDISC_RED,904 TC_SETUP_QDISC_PRIO,905 TC_SETUP_QDISC_MQ,906 TC_SETUP_QDISC_ETF,907 TC_SETUP_ROOT_QDISC,908 TC_SETUP_QDISC_GRED,909 TC_SETUP_QDISC_TAPRIO,910 TC_SETUP_FT,911 TC_SETUP_QDISC_ETS,912 TC_SETUP_QDISC_TBF,913 TC_SETUP_QDISC_FIFO,914 TC_SETUP_QDISC_HTB,915 TC_SETUP_ACT,916};917 918/* These structures hold the attributes of bpf state that are being passed919 * to the netdevice through the bpf op.920 */921enum bpf_netdev_command {922 /* Set or clear a bpf program used in the earliest stages of packet923 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee924 * is responsible for calling bpf_prog_put on any old progs that are925 * stored. In case of error, the callee need not release the new prog926 * reference, but on success it takes ownership and must bpf_prog_put927 * when it is no longer used.928 */929 XDP_SETUP_PROG,930 XDP_SETUP_PROG_HW,931 /* BPF program for offload callbacks, invoked at program load time. */932 BPF_OFFLOAD_MAP_ALLOC,933 BPF_OFFLOAD_MAP_FREE,934 XDP_SETUP_XSK_POOL,935};936 937struct bpf_prog_offload_ops;938struct netlink_ext_ack;939struct xdp_umem;940struct xdp_dev_bulk_queue;941struct bpf_xdp_link;942 943enum bpf_xdp_mode {944 XDP_MODE_SKB = 0,945 XDP_MODE_DRV = 1,946 XDP_MODE_HW = 2,947 __MAX_XDP_MODE948};949 950struct bpf_xdp_entity {951 struct bpf_prog *prog;952 struct bpf_xdp_link *link;953};954 955struct netdev_bpf {956 enum bpf_netdev_command command;957 union {958 /* XDP_SETUP_PROG */959 struct {960 u32 flags;961 struct bpf_prog *prog;962 struct netlink_ext_ack *extack;963 };964 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */965 struct {966 struct bpf_offloaded_map *offmap;967 };968 /* XDP_SETUP_XSK_POOL */969 struct {970 struct xsk_buff_pool *pool;971 u16 queue_id;972 } xsk;973 };974};975 976/* Flags for ndo_xsk_wakeup. */977#define XDP_WAKEUP_RX (1 << 0)978#define XDP_WAKEUP_TX (1 << 1)979 980#ifdef CONFIG_XFRM_OFFLOAD981struct xfrmdev_ops {982 int (*xdo_dev_state_add) (struct xfrm_state *x, struct netlink_ext_ack *extack);983 void (*xdo_dev_state_delete) (struct xfrm_state *x);984 void (*xdo_dev_state_free) (struct xfrm_state *x);985 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,986 struct xfrm_state *x);987 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);988 void (*xdo_dev_state_update_stats) (struct xfrm_state *x);989 int (*xdo_dev_policy_add) (struct xfrm_policy *x, struct netlink_ext_ack *extack);990 void (*xdo_dev_policy_delete) (struct xfrm_policy *x);991 void (*xdo_dev_policy_free) (struct xfrm_policy *x);992};993#endif994 995struct dev_ifalias {996 struct rcu_head rcuhead;997 char ifalias[];998};999 1000struct devlink;1001struct tlsdev_ops;1002 1003struct netdev_net_notifier {1004 struct list_head list;1005 struct notifier_block *nb;1006};1007 1008/*1009 * This structure defines the management hooks for network devices.1010 * The following hooks can be defined; unless noted otherwise, they are1011 * optional and can be filled with a null pointer.1012 *1013 * int (*ndo_init)(struct net_device *dev);1014 * This function is called once when a network device is registered.1015 * The network device can use this for any late stage initialization1016 * or semantic validation. It can fail with an error code which will1017 * be propagated back to register_netdev.1018 *1019 * void (*ndo_uninit)(struct net_device *dev);1020 * This function is called when device is unregistered or when registration1021 * fails. It is not called if init fails.1022 *1023 * int (*ndo_open)(struct net_device *dev);1024 * This function is called when a network device transitions to the up1025 * state.1026 *1027 * int (*ndo_stop)(struct net_device *dev);1028 * This function is called when a network device transitions to the down1029 * state.1030 *1031 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,1032 * struct net_device *dev);1033 * Called when a packet needs to be transmitted.1034 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop1035 * the queue before that can happen; it's for obsolete devices and weird1036 * corner cases, but the stack really does a non-trivial amount1037 * of useless work if you return NETDEV_TX_BUSY.1038 * Required; cannot be NULL.1039 *1040 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,1041 * struct net_device *dev1042 * netdev_features_t features);1043 * Called by core transmit path to determine if device is capable of1044 * performing offload operations on a given packet. This is to give1045 * the device an opportunity to implement any restrictions that cannot1046 * be otherwise expressed by feature flags. The check is called with1047 * the set of features that the stack has calculated and it returns1048 * those the driver believes to be appropriate.1049 *1050 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,1051 * struct net_device *sb_dev);1052 * Called to decide which queue to use when device supports multiple1053 * transmit queues.1054 *1055 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);1056 * This function is called to allow device receiver to make1057 * changes to configuration when multicast or promiscuous is enabled.1058 *1059 * void (*ndo_set_rx_mode)(struct net_device *dev);1060 * This function is called device changes address list filtering.1061 * If driver handles unicast address filtering, it should set1062 * IFF_UNICAST_FLT in its priv_flags.1063 *1064 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);1065 * This function is called when the Media Access Control address1066 * needs to be changed. If this interface is not defined, the1067 * MAC address can not be changed.1068 *1069 * int (*ndo_validate_addr)(struct net_device *dev);1070 * Test if Media Access Control address is valid for the device.1071 *1072 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);1073 * Old-style ioctl entry point. This is used internally by the1074 * appletalk and ieee802154 subsystems but is no longer called by1075 * the device ioctl handler.1076 *1077 * int (*ndo_siocbond)(struct net_device *dev, struct ifreq *ifr, int cmd);1078 * Used by the bonding driver for its device specific ioctls:1079 * SIOCBONDENSLAVE, SIOCBONDRELEASE, SIOCBONDSETHWADDR, SIOCBONDCHANGEACTIVE,1080 * SIOCBONDSLAVEINFOQUERY, and SIOCBONDINFOQUERY1081 *1082 * * int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);1083 * Called for ethernet specific ioctls: SIOCGMIIPHY, SIOCGMIIREG,1084 * SIOCSMIIREG, SIOCSHWTSTAMP and SIOCGHWTSTAMP.1085 *1086 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);1087 * Used to set network devices bus interface parameters. This interface1088 * is retained for legacy reasons; new devices should use the bus1089 * interface (PCI) for low level management.1090 *1091 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);1092 * Called when a user wants to change the Maximum Transfer Unit1093 * of a device.1094 *1095 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);1096 * Callback used when the transmitter has not made any progress1097 * for dev->watchdog ticks.1098 *1099 * void (*ndo_get_stats64)(struct net_device *dev,1100 * struct rtnl_link_stats64 *storage);1101 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);1102 * Called when a user wants to get the network device usage1103 * statistics. Drivers must do one of the following:1104 * 1. Define @ndo_get_stats64 to fill in a zero-initialised1105 * rtnl_link_stats64 structure passed by the caller.1106 * 2. Define @ndo_get_stats to update a net_device_stats structure1107 * (which should normally be dev->stats) and return a pointer to1108 * it. The structure may be changed asynchronously only if each1109 * field is written atomically.1110 * 3. Update dev->stats asynchronously and atomically, and define1111 * neither operation.1112 *1113 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)1114 * Return true if this device supports offload stats of this attr_id.1115 *1116 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,1117 * void *attr_data)1118 * Get statistics for offload operations by attr_id. Write it into the1119 * attr_data pointer.1120 *1121 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);1122 * If device supports VLAN filtering this function is called when a1123 * VLAN id is registered.1124 *1125 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);1126 * If device supports VLAN filtering this function is called when a1127 * VLAN id is unregistered.1128 *1129 * void (*ndo_poll_controller)(struct net_device *dev);1130 *1131 * SR-IOV management functions.1132 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);1133 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,1134 * u8 qos, __be16 proto);1135 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,1136 * int max_tx_rate);1137 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);1138 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);1139 * int (*ndo_get_vf_config)(struct net_device *dev,1140 * int vf, struct ifla_vf_info *ivf);1141 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);1142 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,1143 * struct nlattr *port[]);1144 *1145 * Enable or disable the VF ability to query its RSS Redirection Table and1146 * Hash Key. This is needed since on some devices VF share this information1147 * with PF and querying it may introduce a theoretical security risk.1148 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);1149 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);1150 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,1151 * void *type_data);1152 * Called to setup any 'tc' scheduler, classifier or action on @dev.1153 * This is always called from the stack with the rtnl lock held and netif1154 * tx queues stopped. This allows the netdevice to perform queue1155 * management safely.1156 *1157 * Fiber Channel over Ethernet (FCoE) offload functions.1158 * int (*ndo_fcoe_enable)(struct net_device *dev);1159 * Called when the FCoE protocol stack wants to start using LLD for FCoE1160 * so the underlying device can perform whatever needed configuration or1161 * initialization to support acceleration of FCoE traffic.1162 *1163 * int (*ndo_fcoe_disable)(struct net_device *dev);1164 * Called when the FCoE protocol stack wants to stop using LLD for FCoE1165 * so the underlying device can perform whatever needed clean-ups to1166 * stop supporting acceleration of FCoE traffic.1167 *1168 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,1169 * struct scatterlist *sgl, unsigned int sgc);1170 * Called when the FCoE Initiator wants to initialize an I/O that1171 * is a possible candidate for Direct Data Placement (DDP). The LLD can1172 * perform necessary setup and returns 1 to indicate the device is set up1173 * successfully to perform DDP on this I/O, otherwise this returns 0.1174 *1175 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);1176 * Called when the FCoE Initiator/Target is done with the DDPed I/O as1177 * indicated by the FC exchange id 'xid', so the underlying device can1178 * clean up and reuse resources for later DDP requests.1179 *1180 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,1181 * struct scatterlist *sgl, unsigned int sgc);1182 * Called when the FCoE Target wants to initialize an I/O that1183 * is a possible candidate for Direct Data Placement (DDP). The LLD can1184 * perform necessary setup and returns 1 to indicate the device is set up1185 * successfully to perform DDP on this I/O, otherwise this returns 0.1186 *1187 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,1188 * struct netdev_fcoe_hbainfo *hbainfo);1189 * Called when the FCoE Protocol stack wants information on the underlying1190 * device. This information is utilized by the FCoE protocol stack to1191 * register attributes with Fiber Channel management service as per the1192 * FC-GS Fabric Device Management Information(FDMI) specification.1193 *1194 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);1195 * Called when the underlying device wants to override default World Wide1196 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own1197 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE1198 * protocol stack to use.1199 *1200 * RFS acceleration.1201 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,1202 * u16 rxq_index, u32 flow_id);1203 * Set hardware filter for RFS. rxq_index is the target queue index;1204 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.1205 * Return the filter ID on success, or a negative error code.1206 *1207 * Slave management functions (for bridge, bonding, etc).1208 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);1209 * Called to make another netdev an underling.1210 *1211 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);1212 * Called to release previously enslaved netdev.1213 *1214 * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev,1215 * struct sk_buff *skb,1216 * bool all_slaves);1217 * Get the xmit slave of master device. If all_slaves is true, function1218 * assume all the slaves can transmit.1219 *1220 * Feature/offload setting functions.1221 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,1222 * netdev_features_t features);1223 * Adjusts the requested feature flags according to device-specific1224 * constraints, and returns the resulting flags. Must not modify1225 * the device state.1226 *1227 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);1228 * Called to update device configuration to new features. Passed1229 * feature set might be less than what was returned by ndo_fix_features()).1230 * Must return >0 or -errno if it changed dev->features itself.1231 *1232 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],1233 * struct net_device *dev,1234 * const unsigned char *addr, u16 vid, u16 flags,1235 * struct netlink_ext_ack *extack);1236 * Adds an FDB entry to dev for addr.1237 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],1238 * struct net_device *dev,1239 * const unsigned char *addr, u16 vid)1240 * Deletes the FDB entry from dev corresponding to addr.1241 * int (*ndo_fdb_del_bulk)(struct nlmsghdr *nlh, struct net_device *dev,1242 * struct netlink_ext_ack *extack);1243 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,1244 * struct net_device *dev, struct net_device *filter_dev,1245 * int *idx)1246 * Used to add FDB entries to dump requests. Implementers should add1247 * entries to skb and update idx with the number of entries.1248 *1249 * int (*ndo_mdb_add)(struct net_device *dev, struct nlattr *tb[],1250 * u16 nlmsg_flags, struct netlink_ext_ack *extack);1251 * Adds an MDB entry to dev.1252 * int (*ndo_mdb_del)(struct net_device *dev, struct nlattr *tb[],1253 * struct netlink_ext_ack *extack);1254 * Deletes the MDB entry from dev.1255 * int (*ndo_mdb_del_bulk)(struct net_device *dev, struct nlattr *tb[],1256 * struct netlink_ext_ack *extack);1257 * Bulk deletes MDB entries from dev.1258 * int (*ndo_mdb_dump)(struct net_device *dev, struct sk_buff *skb,1259 * struct netlink_callback *cb);1260 * Dumps MDB entries from dev. The first argument (marker) in the netlink1261 * callback is used by core rtnetlink code.1262 *1263 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,1264 * u16 flags, struct netlink_ext_ack *extack)1265 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,1266 * struct net_device *dev, u32 filter_mask,1267 * int nlflags)1268 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,1269 * u16 flags);1270 *1271 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);1272 * Called to change device carrier. Soft-devices (like dummy, team, etc)1273 * which do not represent real hardware may define this to allow their1274 * userspace components to manage their virtual carrier state. Devices1275 * that determine carrier state from physical hardware properties (eg1276 * network cables) or protocol-dependent mechanisms (eg1277 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.1278 *1279 * int (*ndo_get_phys_port_id)(struct net_device *dev,1280 * struct netdev_phys_item_id *ppid);1281 * Called to get ID of physical port of this device. If driver does1282 * not implement this, it is assumed that the hw is not able to have1283 * multiple net devices on single physical port.1284 *1285 * int (*ndo_get_port_parent_id)(struct net_device *dev,1286 * struct netdev_phys_item_id *ppid)1287 * Called to get the parent ID of the physical port of this device.1288 *1289 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,1290 * struct net_device *dev)1291 * Called by upper layer devices to accelerate switching or other1292 * station functionality into hardware. 'pdev is the lowerdev1293 * to use for the offload and 'dev' is the net device that will1294 * back the offload. Returns a pointer to the private structure1295 * the upper layer will maintain.1296 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)1297 * Called by upper layer device to delete the station created1298 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing1299 * the station and priv is the structure returned by the add1300 * operation.1301 * int (*ndo_set_tx_maxrate)(struct net_device *dev,1302 * int queue_index, u32 maxrate);1303 * Called when a user wants to set a max-rate limitation of specific1304 * TX queue.1305 * int (*ndo_get_iflink)(const struct net_device *dev);1306 * Called to get the iflink value of this device.1307 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);1308 * This function is used to get egress tunnel information for given skb.1309 * This is useful for retrieving outer tunnel header parameters while1310 * sampling packet.1311 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);1312 * This function is used to specify the headroom that the skb must1313 * consider when allocation skb during packet reception. Setting1314 * appropriate rx headroom value allows avoiding skb head copy on1315 * forward. Setting a negative value resets the rx headroom to the1316 * default value.1317 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);1318 * This function is used to set or query state related to XDP on the1319 * netdevice and manage BPF offload. See definition of1320 * enum bpf_netdev_command for details.1321 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,1322 * u32 flags);1323 * This function is used to submit @n XDP packets for transmit on a1324 * netdevice. Returns number of frames successfully transmitted, frames1325 * that got dropped are freed/returned via xdp_return_frame().1326 * Returns negative number, means general error invoking ndo, meaning1327 * no frames were xmit'ed and core-caller will free all frames.1328 * struct net_device *(*ndo_xdp_get_xmit_slave)(struct net_device *dev,1329 * struct xdp_buff *xdp);1330 * Get the xmit slave of master device based on the xdp_buff.1331 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);1332 * This function is used to wake up the softirq, ksoftirqd or kthread1333 * responsible for sending and/or receiving packets on a specific1334 * queue id bound to an AF_XDP socket. The flags field specifies if1335 * only RX, only Tx, or both should be woken up using the flags1336 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.1337 * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm_kern *p,1338 * int cmd);1339 * Add, change, delete or get information on an IPv4 tunnel.1340 * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev);1341 * If a device is paired with a peer device, return the peer instance.1342 * The caller must be under RCU read context.1343 * int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, struct net_device_path *path);1344 * Get the forwarding path to reach the real device from the HW destination address1345 * ktime_t (*ndo_get_tstamp)(struct net_device *dev,1346 * const struct skb_shared_hwtstamps *hwtstamps,1347 * bool cycles);1348 * Get hardware timestamp based on normal/adjustable time or free running1349 * cycle counter. This function is required if physical clock supports a1350 * free running cycle counter.1351 *1352 * int (*ndo_hwtstamp_get)(struct net_device *dev,1353 * struct kernel_hwtstamp_config *kernel_config);1354 * Get the currently configured hardware timestamping parameters for the1355 * NIC device.1356 *1357 * int (*ndo_hwtstamp_set)(struct net_device *dev,1358 * struct kernel_hwtstamp_config *kernel_config,1359 * struct netlink_ext_ack *extack);1360 * Change the hardware timestamping parameters for NIC device.1361 */1362struct net_device_ops {1363 int (*ndo_init)(struct net_device *dev);1364 void (*ndo_uninit)(struct net_device *dev);1365 int (*ndo_open)(struct net_device *dev);1366 int (*ndo_stop)(struct net_device *dev);1367 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,1368 struct net_device *dev);1369 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,1370 struct net_device *dev,1371 netdev_features_t features);1372 u16 (*ndo_select_queue)(struct net_device *dev,1373 struct sk_buff *skb,1374 struct net_device *sb_dev);1375 void (*ndo_change_rx_flags)(struct net_device *dev,1376 int flags);1377 void (*ndo_set_rx_mode)(struct net_device *dev);1378 int (*ndo_set_mac_address)(struct net_device *dev,1379 void *addr);1380 int (*ndo_validate_addr)(struct net_device *dev);1381 int (*ndo_do_ioctl)(struct net_device *dev,1382 struct ifreq *ifr, int cmd);1383 int (*ndo_eth_ioctl)(struct net_device *dev,1384 struct ifreq *ifr, int cmd);1385 int (*ndo_siocbond)(struct net_device *dev,1386 struct ifreq *ifr, int cmd);1387 int (*ndo_siocwandev)(struct net_device *dev,1388 struct if_settings *ifs);1389 int (*ndo_siocdevprivate)(struct net_device *dev,1390 struct ifreq *ifr,1391 void __user *data, int cmd);1392 int (*ndo_set_config)(struct net_device *dev,1393 struct ifmap *map);1394 int (*ndo_change_mtu)(struct net_device *dev,1395 int new_mtu);1396 int (*ndo_neigh_setup)(struct net_device *dev,1397 struct neigh_parms *);1398 void (*ndo_tx_timeout) (struct net_device *dev,1399 unsigned int txqueue);1400 1401 void (*ndo_get_stats64)(struct net_device *dev,1402 struct rtnl_link_stats64 *storage);1403 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);1404 int (*ndo_get_offload_stats)(int attr_id,1405 const struct net_device *dev,1406 void *attr_data);1407 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);1408 1409 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,1410 __be16 proto, u16 vid);1411 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,1412 __be16 proto, u16 vid);1413#ifdef CONFIG_NET_POLL_CONTROLLER1414 void (*ndo_poll_controller)(struct net_device *dev);1415 int (*ndo_netpoll_setup)(struct net_device *dev,1416 struct netpoll_info *info);1417 void (*ndo_netpoll_cleanup)(struct net_device *dev);1418#endif1419 int (*ndo_set_vf_mac)(struct net_device *dev,1420 int queue, u8 *mac);1421 int (*ndo_set_vf_vlan)(struct net_device *dev,1422 int queue, u16 vlan,1423 u8 qos, __be16 proto);1424 int (*ndo_set_vf_rate)(struct net_device *dev,1425 int vf, int min_tx_rate,1426 int max_tx_rate);1427 int (*ndo_set_vf_spoofchk)(struct net_device *dev,1428 int vf, bool setting);1429 int (*ndo_set_vf_trust)(struct net_device *dev,1430 int vf, bool setting);1431 int (*ndo_get_vf_config)(struct net_device *dev,1432 int vf,1433 struct ifla_vf_info *ivf);1434 int (*ndo_set_vf_link_state)(struct net_device *dev,1435 int vf, int link_state);1436 int (*ndo_get_vf_stats)(struct net_device *dev,1437 int vf,1438 struct ifla_vf_stats1439 *vf_stats);1440 int (*ndo_set_vf_port)(struct net_device *dev,1441 int vf,1442 struct nlattr *port[]);1443 int (*ndo_get_vf_port)(struct net_device *dev,1444 int vf, struct sk_buff *skb);1445 int (*ndo_get_vf_guid)(struct net_device *dev,1446 int vf,1447 struct ifla_vf_guid *node_guid,1448 struct ifla_vf_guid *port_guid);1449 int (*ndo_set_vf_guid)(struct net_device *dev,1450 int vf, u64 guid,1451 int guid_type);1452 int (*ndo_set_vf_rss_query_en)(1453 struct net_device *dev,1454 int vf, bool setting);1455 int (*ndo_setup_tc)(struct net_device *dev,1456 enum tc_setup_type type,1457 void *type_data);1458#if IS_ENABLED(CONFIG_FCOE)1459 int (*ndo_fcoe_enable)(struct net_device *dev);1460 int (*ndo_fcoe_disable)(struct net_device *dev);1461 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,1462 u16 xid,1463 struct scatterlist *sgl,1464 unsigned int sgc);1465 int (*ndo_fcoe_ddp_done)(struct net_device *dev,1466 u16 xid);1467 int (*ndo_fcoe_ddp_target)(struct net_device *dev,1468 u16 xid,1469 struct scatterlist *sgl,1470 unsigned int sgc);1471 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,1472 struct netdev_fcoe_hbainfo *hbainfo);1473#endif1474 1475#if IS_ENABLED(CONFIG_LIBFCOE)1476#define NETDEV_FCOE_WWNN 01477#define NETDEV_FCOE_WWPN 11478 int (*ndo_fcoe_get_wwn)(struct net_device *dev,1479 u64 *wwn, int type);1480#endif1481 1482#ifdef CONFIG_RFS_ACCEL1483 int (*ndo_rx_flow_steer)(struct net_device *dev,1484 const struct sk_buff *skb,1485 u16 rxq_index,1486 u32 flow_id);1487#endif1488 int (*ndo_add_slave)(struct net_device *dev,1489 struct net_device *slave_dev,1490 struct netlink_ext_ack *extack);1491 int (*ndo_del_slave)(struct net_device *dev,1492 struct net_device *slave_dev);1493 struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev,1494 struct sk_buff *skb,1495 bool all_slaves);1496 struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev,1497 struct sock *sk);1498 netdev_features_t (*ndo_fix_features)(struct net_device *dev,1499 netdev_features_t features);1500 int (*ndo_set_features)(struct net_device *dev,1501 netdev_features_t features);1502 int (*ndo_neigh_construct)(struct net_device *dev,1503 struct neighbour *n);1504 void (*ndo_neigh_destroy)(struct net_device *dev,1505 struct neighbour *n);1506 1507 int (*ndo_fdb_add)(struct ndmsg *ndm,1508 struct nlattr *tb[],1509 struct net_device *dev,1510 const unsigned char *addr,1511 u16 vid,1512 u16 flags,1513 struct netlink_ext_ack *extack);1514 int (*ndo_fdb_del)(struct ndmsg *ndm,1515 struct nlattr *tb[],1516 struct net_device *dev,1517 const unsigned char *addr,1518 u16 vid, struct netlink_ext_ack *extack);1519 int (*ndo_fdb_del_bulk)(struct nlmsghdr *nlh,1520 struct net_device *dev,1521 struct netlink_ext_ack *extack);1522 int (*ndo_fdb_dump)(struct sk_buff *skb,1523 struct netlink_callback *cb,1524 struct net_device *dev,1525 struct net_device *filter_dev,1526 int *idx);1527 int (*ndo_fdb_get)(struct sk_buff *skb,1528 struct nlattr *tb[],1529 struct net_device *dev,1530 const unsigned char *addr,1531 u16 vid, u32 portid, u32 seq,1532 struct netlink_ext_ack *extack);1533 int (*ndo_mdb_add)(struct net_device *dev,1534 struct nlattr *tb[],1535 u16 nlmsg_flags,1536 struct netlink_ext_ack *extack);1537 int (*ndo_mdb_del)(struct net_device *dev,1538 struct nlattr *tb[],1539 struct netlink_ext_ack *extack);1540 int (*ndo_mdb_del_bulk)(struct net_device *dev,1541 struct nlattr *tb[],1542 struct netlink_ext_ack *extack);1543 int (*ndo_mdb_dump)(struct net_device *dev,1544 struct sk_buff *skb,1545 struct netlink_callback *cb);1546 int (*ndo_mdb_get)(struct net_device *dev,1547 struct nlattr *tb[], u32 portid,1548 u32 seq,1549 struct netlink_ext_ack *extack);1550 int (*ndo_bridge_setlink)(struct net_device *dev,1551 struct nlmsghdr *nlh,1552 u16 flags,1553 struct netlink_ext_ack *extack);1554 int (*ndo_bridge_getlink)(struct sk_buff *skb,1555 u32 pid, u32 seq,1556 struct net_device *dev,1557 u32 filter_mask,1558 int nlflags);1559 int (*ndo_bridge_dellink)(struct net_device *dev,1560 struct nlmsghdr *nlh,1561 u16 flags);1562 int (*ndo_change_carrier)(struct net_device *dev,1563 bool new_carrier);1564 int (*ndo_get_phys_port_id)(struct net_device *dev,1565 struct netdev_phys_item_id *ppid);1566 int (*ndo_get_port_parent_id)(struct net_device *dev,1567 struct netdev_phys_item_id *ppid);1568 int (*ndo_get_phys_port_name)(struct net_device *dev,1569 char *name, size_t len);1570 void* (*ndo_dfwd_add_station)(struct net_device *pdev,1571 struct net_device *dev);1572 void (*ndo_dfwd_del_station)(struct net_device *pdev,1573 void *priv);1574 1575 int (*ndo_set_tx_maxrate)(struct net_device *dev,1576 int queue_index,1577 u32 maxrate);1578 int (*ndo_get_iflink)(const struct net_device *dev);1579 int (*ndo_fill_metadata_dst)(struct net_device *dev,1580 struct sk_buff *skb);1581 void (*ndo_set_rx_headroom)(struct net_device *dev,1582 int needed_headroom);1583 int (*ndo_bpf)(struct net_device *dev,1584 struct netdev_bpf *bpf);1585 int (*ndo_xdp_xmit)(struct net_device *dev, int n,1586 struct xdp_frame **xdp,1587 u32 flags);1588 struct net_device * (*ndo_xdp_get_xmit_slave)(struct net_device *dev,1589 struct xdp_buff *xdp);1590 int (*ndo_xsk_wakeup)(struct net_device *dev,1591 u32 queue_id, u32 flags);1592 int (*ndo_tunnel_ctl)(struct net_device *dev,1593 struct ip_tunnel_parm_kern *p,1594 int cmd);1595 struct net_device * (*ndo_get_peer_dev)(struct net_device *dev);1596 int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx,1597 struct net_device_path *path);1598 ktime_t (*ndo_get_tstamp)(struct net_device *dev,1599 const struct skb_shared_hwtstamps *hwtstamps,1600 bool cycles);1601 int (*ndo_hwtstamp_get)(struct net_device *dev,1602 struct kernel_hwtstamp_config *kernel_config);1603 int (*ndo_hwtstamp_set)(struct net_device *dev,1604 struct kernel_hwtstamp_config *kernel_config,1605 struct netlink_ext_ack *extack);1606};1607 1608/**1609 * enum netdev_priv_flags - &struct net_device priv_flags1610 *1611 * These are the &struct net_device, they are only set internally1612 * by drivers and used in the kernel. These flags are invisible to1613 * userspace; this means that the order of these flags can change1614 * during any kernel release.1615 *1616 * You should add bitfield booleans after either net_device::priv_flags1617 * (hotpath) or ::threaded (slowpath) instead of extending these flags.1618 *1619 * @IFF_802_1Q_VLAN: 802.1Q VLAN device1620 * @IFF_EBRIDGE: Ethernet bridging device1621 * @IFF_BONDING: bonding master or slave1622 * @IFF_ISATAP: ISATAP interface (RFC4214)1623 * @IFF_WAN_HDLC: WAN HDLC device1624 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to1625 * release skb->dst1626 * @IFF_DONT_BRIDGE: disallow bridging this ether dev1627 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time1628 * @IFF_MACVLAN_PORT: device used as macvlan port1629 * @IFF_BRIDGE_PORT: device used as bridge port1630 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port1631 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit1632 * @IFF_UNICAST_FLT: Supports unicast filtering1633 * @IFF_TEAM_PORT: device used as team port1634 * @IFF_SUPP_NOFCS: device supports sending custom FCS1635 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address1636 * change when it's running1637 * @IFF_MACVLAN: Macvlan device1638 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account1639 * underlying stacked devices1640 * @IFF_L3MDEV_MASTER: device is an L3 master device1641 * @IFF_NO_QUEUE: device can run without qdisc attached1642 * @IFF_OPENVSWITCH: device is a Open vSwitch master1643 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device1644 * @IFF_TEAM: device is a team device1645 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured1646 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external1647 * entity (i.e. the master device for bridged veth)1648 * @IFF_MACSEC: device is a MACsec device1649 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook1650 * @IFF_FAILOVER: device is a failover master device1651 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device1652 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device1653 * @IFF_NO_ADDRCONF: prevent ipv6 addrconf1654 * @IFF_TX_SKB_NO_LINEAR: device/driver is capable of xmitting frames with1655 * skb_headlen(skb) == 0 (data starts from frag0)1656 */1657enum netdev_priv_flags {1658 IFF_802_1Q_VLAN = 1<<0,1659 IFF_EBRIDGE = 1<<1,1660 IFF_BONDING = 1<<2,1661 IFF_ISATAP = 1<<3,1662 IFF_WAN_HDLC = 1<<4,1663 IFF_XMIT_DST_RELEASE = 1<<5,1664 IFF_DONT_BRIDGE = 1<<6,1665 IFF_DISABLE_NETPOLL = 1<<7,1666 IFF_MACVLAN_PORT = 1<<8,1667 IFF_BRIDGE_PORT = 1<<9,1668 IFF_OVS_DATAPATH = 1<<10,1669 IFF_TX_SKB_SHARING = 1<<11,1670 IFF_UNICAST_FLT = 1<<12,1671 IFF_TEAM_PORT = 1<<13,1672 IFF_SUPP_NOFCS = 1<<14,1673 IFF_LIVE_ADDR_CHANGE = 1<<15,1674 IFF_MACVLAN = 1<<16,1675 IFF_XMIT_DST_RELEASE_PERM = 1<<17,1676 IFF_L3MDEV_MASTER = 1<<18,1677 IFF_NO_QUEUE = 1<<19,1678 IFF_OPENVSWITCH = 1<<20,1679 IFF_L3MDEV_SLAVE = 1<<21,1680 IFF_TEAM = 1<<22,1681 IFF_RXFH_CONFIGURED = 1<<23,1682 IFF_PHONY_HEADROOM = 1<<24,1683 IFF_MACSEC = 1<<25,1684 IFF_NO_RX_HANDLER = 1<<26,1685 IFF_FAILOVER = 1<<27,1686 IFF_FAILOVER_SLAVE = 1<<28,1687 IFF_L3MDEV_RX_HANDLER = 1<<29,1688 IFF_NO_ADDRCONF = BIT_ULL(30),1689 IFF_TX_SKB_NO_LINEAR = BIT_ULL(31),1690};1691 1692/* Specifies the type of the struct net_device::ml_priv pointer */1693enum netdev_ml_priv_type {1694 ML_PRIV_NONE,1695 ML_PRIV_CAN,1696};1697 1698enum netdev_stat_type {1699 NETDEV_PCPU_STAT_NONE,1700 NETDEV_PCPU_STAT_LSTATS, /* struct pcpu_lstats */1701 NETDEV_PCPU_STAT_TSTATS, /* struct pcpu_sw_netstats */1702 NETDEV_PCPU_STAT_DSTATS, /* struct pcpu_dstats */1703};1704 1705enum netdev_reg_state {1706 NETREG_UNINITIALIZED = 0,1707 NETREG_REGISTERED, /* completed register_netdevice */1708 NETREG_UNREGISTERING, /* called unregister_netdevice */1709 NETREG_UNREGISTERED, /* completed unregister todo */1710 NETREG_RELEASED, /* called free_netdev */1711 NETREG_DUMMY, /* dummy device for NAPI poll */1712};1713 1714/**1715 * struct net_device - The DEVICE structure.1716 *1717 * Actually, this whole structure is a big mistake. It mixes I/O1718 * data with strictly "high-level" data, and it has to know about1719 * almost every data structure used in the INET module.1720 *1721 * @priv_flags: flags invisible to userspace defined as bits, see1722 * enum netdev_priv_flags for the definitions1723 * @lltx: device supports lockless Tx. Deprecated for real HW1724 * drivers. Mainly used by logical interfaces, such as1725 * bonding and tunnels1726 *1727 * @name: This is the first field of the "visible" part of this structure1728 * (i.e. as seen by users in the "Space.c" file). It is the name1729 * of the interface.1730 *1731 * @name_node: Name hashlist node1732 * @ifalias: SNMP alias1733 * @mem_end: Shared memory end1734 * @mem_start: Shared memory start1735 * @base_addr: Device I/O address1736 * @irq: Device IRQ number1737 *1738 * @state: Generic network queuing layer state, see netdev_state_t1739 * @dev_list: The global list of network devices1740 * @napi_list: List entry used for polling NAPI devices1741 * @unreg_list: List entry when we are unregistering the1742 * device; see the function unregister_netdev1743 * @close_list: List entry used when we are closing the device1744 * @ptype_all: Device-specific packet handlers for all protocols1745 * @ptype_specific: Device-specific, protocol-specific packet handlers1746 *1747 * @adj_list: Directly linked devices, like slaves for bonding1748 * @features: Currently active device features1749 * @hw_features: User-changeable features1750 *1751 * @wanted_features: User-requested features1752 * @vlan_features: Mask of features inheritable by VLAN devices1753 *1754 * @hw_enc_features: Mask of features inherited by encapsulating devices1755 * This field indicates what encapsulation1756 * offloads the hardware is capable of doing,1757 * and drivers will need to set them appropriately.1758 *1759 * @mpls_features: Mask of features inheritable by MPLS1760 * @gso_partial_features: value(s) from NETIF_F_GSO\*1761 *1762 * @ifindex: interface index1763 * @group: The group the device belongs to1764 *1765 * @stats: Statistics struct, which was left as a legacy, use1766 * rtnl_link_stats64 instead1767 *1768 * @core_stats: core networking counters,1769 * do not use this in drivers1770 * @carrier_up_count: Number of times the carrier has been up1771 * @carrier_down_count: Number of times the carrier has been down1772 *1773 * @wireless_handlers: List of functions to handle Wireless Extensions,1774 * instead of ioctl,1775 * see <net/iw_handler.h> for details.1776 * @wireless_data: Instance data managed by the core of wireless extensions1777 *1778 * @netdev_ops: Includes several pointers to callbacks,1779 * if one wants to override the ndo_*() functions1780 * @xdp_metadata_ops: Includes pointers to XDP metadata callbacks.1781 * @xsk_tx_metadata_ops: Includes pointers to AF_XDP TX metadata callbacks.1782 * @ethtool_ops: Management operations1783 * @l3mdev_ops: Layer 3 master device operations1784 * @ndisc_ops: Includes callbacks for different IPv6 neighbour1785 * discovery handling. Necessary for e.g. 6LoWPAN.1786 * @xfrmdev_ops: Transformation offload operations1787 * @tlsdev_ops: Transport Layer Security offload operations1788 * @header_ops: Includes callbacks for creating,parsing,caching,etc1789 * of Layer 2 headers.1790 *1791 * @flags: Interface flags (a la BSD)1792 * @xdp_features: XDP capability supported by the device1793 * @gflags: Global flags ( kept as legacy )1794 * @priv_len: Size of the ->priv flexible array1795 * @priv: Flexible array containing private data1796 * @operstate: RFC2863 operstate1797 * @link_mode: Mapping policy to operstate1798 * @if_port: Selectable AUI, TP, ...1799 * @dma: DMA channel1800 * @mtu: Interface MTU value1801 * @min_mtu: Interface Minimum MTU value1802 * @max_mtu: Interface Maximum MTU value1803 * @type: Interface hardware type1804 * @hard_header_len: Maximum hardware header length.1805 * @min_header_len: Minimum hardware header length1806 *1807 * @needed_headroom: Extra headroom the hardware may need, but not in all1808 * cases can this be guaranteed1809 * @needed_tailroom: Extra tailroom the hardware may need, but not in all1810 * cases can this be guaranteed. Some cases also use1811 * LL_MAX_HEADER instead to allocate the skb1812 *1813 * interface address info:1814 *1815 * @perm_addr: Permanent hw address1816 * @addr_assign_type: Hw address assignment type1817 * @addr_len: Hardware address length1818 * @upper_level: Maximum depth level of upper devices.1819 * @lower_level: Maximum depth level of lower devices.1820 * @neigh_priv_len: Used in neigh_alloc()1821 * @dev_id: Used to differentiate devices that share1822 * the same link layer address1823 * @dev_port: Used to differentiate devices that share1824 * the same function1825 * @addr_list_lock: XXX: need comments on this one1826 * @name_assign_type: network interface name assignment type1827 * @uc_promisc: Counter that indicates promiscuous mode1828 * has been enabled due to the need to listen to1829 * additional unicast addresses in a device that1830 * does not implement ndo_set_rx_mode()1831 * @uc: unicast mac addresses1832 * @mc: multicast mac addresses1833 * @dev_addrs: list of device hw addresses1834 * @queues_kset: Group of all Kobjects in the Tx and RX queues1835 * @promiscuity: Number of times the NIC is told to work in1836 * promiscuous mode; if it becomes 0 the NIC will1837 * exit promiscuous mode1838 * @allmulti: Counter, enables or disables allmulticast mode1839 *1840 * @vlan_info: VLAN info1841 * @dsa_ptr: dsa specific data1842 * @tipc_ptr: TIPC specific data1843 * @atalk_ptr: AppleTalk link1844 * @ip_ptr: IPv4 specific data1845 * @ip6_ptr: IPv6 specific data1846 * @ax25_ptr: AX.25 specific data1847 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering1848 * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network1849 * device struct1850 * @mpls_ptr: mpls_dev struct pointer1851 * @mctp_ptr: MCTP specific data1852 *1853 * @dev_addr: Hw address (before bcast,1854 * because most packets are unicast)1855 *1856 * @_rx: Array of RX queues1857 * @num_rx_queues: Number of RX queues1858 * allocated at register_netdev() time1859 * @real_num_rx_queues: Number of RX queues currently active in device1860 * @xdp_prog: XDP sockets filter program pointer1861 * @gro_flush_timeout: timeout for GRO layer in NAPI1862 * @napi_defer_hard_irqs: If not zero, provides a counter that would1863 * allow to avoid NIC hard IRQ, on busy queues.1864 *1865 * @rx_handler: handler for received packets1866 * @rx_handler_data: XXX: need comments on this one1867 * @tcx_ingress: BPF & clsact qdisc specific data for ingress processing1868 * @ingress_queue: XXX: need comments on this one1869 * @nf_hooks_ingress: netfilter hooks executed for ingress packets1870 * @broadcast: hw bcast address1871 *1872 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,1873 * indexed by RX queue number. Assigned by driver.1874 * This must only be set if the ndo_rx_flow_steer1875 * operation is defined1876 * @index_hlist: Device index hash chain1877 *1878 * @_tx: Array of TX queues1879 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time1880 * @real_num_tx_queues: Number of TX queues currently active in device1881 * @qdisc: Root qdisc from userspace point of view1882 * @tx_queue_len: Max frames per queue allowed1883 * @tx_global_lock: XXX: need comments on this one1884 * @xdp_bulkq: XDP device bulk queue1885 * @xps_maps: all CPUs/RXQs maps for XPS device1886 *1887 * @xps_maps: XXX: need comments on this one1888 * @tcx_egress: BPF & clsact qdisc specific data for egress processing1889 * @nf_hooks_egress: netfilter hooks executed for egress packets1890 * @qdisc_hash: qdisc hash table1891 * @watchdog_timeo: Represents the timeout that is used by1892 * the watchdog (see dev_watchdog())1893 * @watchdog_timer: List of timers1894 *1895 * @proto_down_reason: reason a netdev interface is held down1896 * @pcpu_refcnt: Number of references to this device1897 * @dev_refcnt: Number of references to this device1898 * @refcnt_tracker: Tracker directory for tracked references to this device1899 * @todo_list: Delayed register/unregister1900 * @link_watch_list: XXX: need comments on this one1901 *1902 * @reg_state: Register/unregister state machine1903 * @dismantle: Device is going to be freed1904 * @rtnl_link_state: This enum represents the phases of creating1905 * a new link1906 *1907 * @needs_free_netdev: Should unregister perform free_netdev?1908 * @priv_destructor: Called from unregister1909 * @npinfo: XXX: need comments on this one1910 * @nd_net: Network namespace this network device is inside1911 *1912 * @ml_priv: Mid-layer private1913 * @ml_priv_type: Mid-layer private type1914 *1915 * @pcpu_stat_type: Type of device statistics which the core should1916 * allocate/free: none, lstats, tstats, dstats. none1917 * means the driver is handling statistics allocation/1918 * freeing internally.1919 * @lstats: Loopback statistics: packets, bytes1920 * @tstats: Tunnel statistics: RX/TX packets, RX/TX bytes1921 * @dstats: Dummy statistics: RX/TX/drop packets, RX/TX bytes1922 *1923 * @garp_port: GARP1924 * @mrp_port: MRP1925 *1926 * @dm_private: Drop monitor private1927 *1928 * @dev: Class/net/name entry1929 * @sysfs_groups: Space for optional device, statistics and wireless1930 * sysfs groups1931 *1932 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes1933 * @rtnl_link_ops: Rtnl_link_ops1934 * @stat_ops: Optional ops for queue-aware statistics1935 * @queue_mgmt_ops: Optional ops for queue management1936 *1937 * @gso_max_size: Maximum size of generic segmentation offload1938 * @tso_max_size: Device (as in HW) limit on the max TSO request size1939 * @gso_max_segs: Maximum number of segments that can be passed to the1940 * NIC for GSO1941 * @tso_max_segs: Device (as in HW) limit on the max TSO segment count1942 * @gso_ipv4_max_size: Maximum size of generic segmentation offload,1943 * for IPv4.1944 *1945 * @dcbnl_ops: Data Center Bridging netlink ops1946 * @num_tc: Number of traffic classes in the net device1947 * @tc_to_txq: XXX: need comments on this one1948 * @prio_tc_map: XXX: need comments on this one1949 *1950 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp1951 *1952 * @priomap: XXX: need comments on this one1953 * @link_topo: Physical link topology tracking attached PHYs1954 * @phydev: Physical device may attach itself1955 * for hardware timestamping1956 * @sfp_bus: attached &struct sfp_bus structure.1957 *1958 * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock1959 *1960 * @proto_down: protocol port state information can be sent to the1961 * switch driver and used to set the phys state of the1962 * switch port.1963 *1964 * @threaded: napi threaded mode is enabled1965 *1966 * @see_all_hwtstamp_requests: device wants to see calls to1967 * ndo_hwtstamp_set() for all timestamp requests1968 * regardless of source, even if those aren't1969 * HWTSTAMP_SOURCE_NETDEV1970 * @change_proto_down: device supports setting carrier via IFLA_PROTO_DOWN1971 * @netns_local: interface can't change network namespaces1972 * @fcoe_mtu: device supports maximum FCoE MTU, 2158 bytes1973 *1974 * @net_notifier_list: List of per-net netdev notifier block1975 * that follow this device when it is moved1976 * to another network namespace.1977 *1978 * @macsec_ops: MACsec offloading ops1979 *1980 * @udp_tunnel_nic_info: static structure describing the UDP tunnel1981 * offload capabilities of the device1982 * @udp_tunnel_nic: UDP tunnel offload state1983 * @ethtool: ethtool related state1984 * @xdp_state: stores info on attached XDP BPF programs1985 *1986 * @nested_level: Used as a parameter of spin_lock_nested() of1987 * dev->addr_list_lock.1988 * @unlink_list: As netif_addr_lock() can be called recursively,1989 * keep a list of interfaces to be deleted.1990 * @gro_max_size: Maximum size of aggregated packet in generic1991 * receive offload (GRO)1992 * @gro_ipv4_max_size: Maximum size of aggregated packet in generic1993 * receive offload (GRO), for IPv4.1994 * @xdp_zc_max_segs: Maximum number of segments supported by AF_XDP1995 * zero copy driver1996 *1997 * @dev_addr_shadow: Copy of @dev_addr to catch direct writes.1998 * @linkwatch_dev_tracker: refcount tracker used by linkwatch.1999 * @watchdog_dev_tracker: refcount tracker used by watchdog.2000 * @dev_registered_tracker: tracker for reference held while2001 * registered2002 * @offload_xstats_l3: L3 HW stats for this netdevice.2003 *2004 * @devlink_port: Pointer to related devlink port structure.2005 * Assigned by a driver before netdev registration using2006 * SET_NETDEV_DEVLINK_PORT macro. This pointer is static2007 * during the time netdevice is registered.2008 *2009 * @dpll_pin: Pointer to the SyncE source pin of a DPLL subsystem,2010 * where the clock is recovered.2011 *2012 * FIXME: cleanup struct net_device such that network protocol info2013 * moves out.2014 */2015 2016struct net_device {2017 /* Cacheline organization can be found documented in2018 * Documentation/networking/net_cachelines/net_device.rst.2019 * Please update the document when adding new fields.2020 */2021 2022 /* TX read-mostly hotpath */2023 __cacheline_group_begin(net_device_read_tx);2024 struct_group(priv_flags_fast,2025 unsigned long priv_flags:32;2026 unsigned long lltx:1;2027 );2028 const struct net_device_ops *netdev_ops;2029 const struct header_ops *header_ops;2030 struct netdev_queue *_tx;2031 netdev_features_t gso_partial_features;2032 unsigned int real_num_tx_queues;2033 unsigned int gso_max_size;2034 unsigned int gso_ipv4_max_size;2035 u16 gso_max_segs;2036 s16 num_tc;2037 /* Note : dev->mtu is often read without holding a lock.2038 * Writers usually hold RTNL.2039 * It is recommended to use READ_ONCE() to annotate the reads,2040 * and to use WRITE_ONCE() to annotate the writes.2041 */2042 unsigned int mtu;2043 unsigned short needed_headroom;2044 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];2045#ifdef CONFIG_XPS2046 struct xps_dev_maps __rcu *xps_maps[XPS_MAPS_MAX];2047#endif2048#ifdef CONFIG_NETFILTER_EGRESS2049 struct nf_hook_entries __rcu *nf_hooks_egress;2050#endif2051#ifdef CONFIG_NET_XGRESS2052 struct bpf_mprog_entry __rcu *tcx_egress;2053#endif2054 __cacheline_group_end(net_device_read_tx);2055 2056 /* TXRX read-mostly hotpath */2057 __cacheline_group_begin(net_device_read_txrx);2058 union {2059 struct pcpu_lstats __percpu *lstats;2060 struct pcpu_sw_netstats __percpu *tstats;2061 struct pcpu_dstats __percpu *dstats;2062 };2063 unsigned long state;2064 unsigned int flags;2065 unsigned short hard_header_len;2066 netdev_features_t features;2067 struct inet6_dev __rcu *ip6_ptr;2068 __cacheline_group_end(net_device_read_txrx);2069 2070 /* RX read-mostly hotpath */2071 __cacheline_group_begin(net_device_read_rx);2072 struct bpf_prog __rcu *xdp_prog;2073 struct list_head ptype_specific;2074 int ifindex;2075 unsigned int real_num_rx_queues;2076 struct netdev_rx_queue *_rx;2077 unsigned long gro_flush_timeout;2078 u32 napi_defer_hard_irqs;2079 unsigned int gro_max_size;2080 unsigned int gro_ipv4_max_size;2081 rx_handler_func_t __rcu *rx_handler;2082 void __rcu *rx_handler_data;2083 possible_net_t nd_net;2084#ifdef CONFIG_NETPOLL2085 struct netpoll_info __rcu *npinfo;2086#endif2087#ifdef CONFIG_NET_XGRESS2088 struct bpf_mprog_entry __rcu *tcx_ingress;2089#endif2090 __cacheline_group_end(net_device_read_rx);2091 2092 char name[IFNAMSIZ];2093 struct netdev_name_node *name_node;2094 struct dev_ifalias __rcu *ifalias;2095 /*2096 * I/O specific fields2097 * FIXME: Merge these and struct ifmap into one2098 */2099 unsigned long mem_end;2100 unsigned long mem_start;2101 unsigned long base_addr;2102 2103 /*2104 * Some hardware also needs these fields (state,dev_list,2105 * napi_list,unreg_list,close_list) but they are not2106 * part of the usual set specified in Space.c.2107 */2108 2109 2110 struct list_head dev_list;2111 struct list_head napi_list;2112 struct list_head unreg_list;2113 struct list_head close_list;2114 struct list_head ptype_all;2115 2116 struct {2117 struct list_head upper;2118 struct list_head lower;2119 } adj_list;2120 2121 /* Read-mostly cache-line for fast-path access */2122 xdp_features_t xdp_features;2123 const struct xdp_metadata_ops *xdp_metadata_ops;2124 const struct xsk_tx_metadata_ops *xsk_tx_metadata_ops;2125 unsigned short gflags;2126 2127 unsigned short needed_tailroom;2128 2129 netdev_features_t hw_features;2130 netdev_features_t wanted_features;2131 netdev_features_t vlan_features;2132 netdev_features_t hw_enc_features;2133 netdev_features_t mpls_features;2134 2135 unsigned int min_mtu;2136 unsigned int max_mtu;2137 unsigned short type;2138 unsigned char min_header_len;2139 unsigned char name_assign_type;2140 2141 int group;2142 2143 struct net_device_stats stats; /* not used by modern drivers */2144 2145 struct net_device_core_stats __percpu *core_stats;2146 2147 /* Stats to monitor link on/off, flapping */2148 atomic_t carrier_up_count;2149 atomic_t carrier_down_count;2150 2151#ifdef CONFIG_WIRELESS_EXT2152 const struct iw_handler_def *wireless_handlers;2153 struct iw_public_data *wireless_data;2154#endif2155 const struct ethtool_ops *ethtool_ops;2156#ifdef CONFIG_NET_L3_MASTER_DEV2157 const struct l3mdev_ops *l3mdev_ops;2158#endif2159#if IS_ENABLED(CONFIG_IPV6)2160 const struct ndisc_ops *ndisc_ops;2161#endif2162 2163#ifdef CONFIG_XFRM_OFFLOAD2164 const struct xfrmdev_ops *xfrmdev_ops;2165#endif2166 2167#if IS_ENABLED(CONFIG_TLS_DEVICE)2168 const struct tlsdev_ops *tlsdev_ops;2169#endif2170 2171 unsigned int operstate;2172 unsigned char link_mode;2173 2174 unsigned char if_port;2175 unsigned char dma;2176 2177 /* Interface address info. */2178 unsigned char perm_addr[MAX_ADDR_LEN];2179 unsigned char addr_assign_type;2180 unsigned char addr_len;2181 unsigned char upper_level;2182 unsigned char lower_level;2183 2184 unsigned short neigh_priv_len;2185 unsigned short dev_id;2186 unsigned short dev_port;2187 int irq;2188 u32 priv_len;2189 2190 spinlock_t addr_list_lock;2191 2192 struct netdev_hw_addr_list uc;2193 struct netdev_hw_addr_list mc;2194 struct netdev_hw_addr_list dev_addrs;2195 2196#ifdef CONFIG_SYSFS2197 struct kset *queues_kset;2198#endif2199#ifdef CONFIG_LOCKDEP2200 struct list_head unlink_list;2201#endif2202 unsigned int promiscuity;2203 unsigned int allmulti;2204 bool uc_promisc;2205#ifdef CONFIG_LOCKDEP2206 unsigned char nested_level;2207#endif2208 2209 2210 /* Protocol-specific pointers */2211 struct in_device __rcu *ip_ptr;2212#if IS_ENABLED(CONFIG_VLAN_8021Q)2213 struct vlan_info __rcu *vlan_info;2214#endif2215#if IS_ENABLED(CONFIG_NET_DSA)2216 struct dsa_port *dsa_ptr;2217#endif2218#if IS_ENABLED(CONFIG_TIPC)2219 struct tipc_bearer __rcu *tipc_ptr;2220#endif2221#if IS_ENABLED(CONFIG_ATALK)2222 void *atalk_ptr;2223#endif2224#if IS_ENABLED(CONFIG_AX25)2225 void *ax25_ptr;2226#endif2227#if IS_ENABLED(CONFIG_CFG80211)2228 struct wireless_dev *ieee80211_ptr;2229#endif2230#if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN)2231 struct wpan_dev *ieee802154_ptr;2232#endif2233#if IS_ENABLED(CONFIG_MPLS_ROUTING)2234 struct mpls_dev __rcu *mpls_ptr;2235#endif2236#if IS_ENABLED(CONFIG_MCTP)2237 struct mctp_dev __rcu *mctp_ptr;2238#endif2239 2240/*2241 * Cache lines mostly used on receive path (including eth_type_trans())2242 */2243 /* Interface address info used in eth_type_trans() */2244 const unsigned char *dev_addr;2245 2246 unsigned int num_rx_queues;2247#define GRO_LEGACY_MAX_SIZE 65536u2248/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE),2249 * and shinfo->gso_segs is a 16bit field.2250 */2251#define GRO_MAX_SIZE (8 * 65535u)2252 unsigned int xdp_zc_max_segs;2253 struct netdev_queue __rcu *ingress_queue;2254#ifdef CONFIG_NETFILTER_INGRESS2255 struct nf_hook_entries __rcu *nf_hooks_ingress;2256#endif2257 2258 unsigned char broadcast[MAX_ADDR_LEN];2259#ifdef CONFIG_RFS_ACCEL2260 struct cpu_rmap *rx_cpu_rmap;2261#endif2262 struct hlist_node index_hlist;2263 2264/*2265 * Cache lines mostly used on transmit path2266 */2267 unsigned int num_tx_queues;2268 struct Qdisc __rcu *qdisc;2269 unsigned int tx_queue_len;2270 spinlock_t tx_global_lock;2271 2272 struct xdp_dev_bulk_queue __percpu *xdp_bulkq;2273 2274#ifdef CONFIG_NET_SCHED2275 DECLARE_HASHTABLE (qdisc_hash, 4);2276#endif2277 /* These may be needed for future network-power-down code. */2278 struct timer_list watchdog_timer;2279 int watchdog_timeo;2280 2281 u32 proto_down_reason;2282 2283 struct list_head todo_list;2284 2285#ifdef CONFIG_PCPU_DEV_REFCNT2286 int __percpu *pcpu_refcnt;2287#else2288 refcount_t dev_refcnt;2289#endif2290 struct ref_tracker_dir refcnt_tracker;2291 2292 struct list_head link_watch_list;2293 2294 u8 reg_state;2295 2296 bool dismantle;2297 2298 enum {2299 RTNL_LINK_INITIALIZED,2300 RTNL_LINK_INITIALIZING,2301 } rtnl_link_state:16;2302 2303 bool needs_free_netdev;2304 void (*priv_destructor)(struct net_device *dev);2305 2306 /* mid-layer private */2307 void *ml_priv;2308 enum netdev_ml_priv_type ml_priv_type;2309 2310 enum netdev_stat_type pcpu_stat_type:8;2311 2312#if IS_ENABLED(CONFIG_GARP)2313 struct garp_port __rcu *garp_port;2314#endif2315#if IS_ENABLED(CONFIG_MRP)2316 struct mrp_port __rcu *mrp_port;2317#endif2318#if IS_ENABLED(CONFIG_NET_DROP_MONITOR)2319 struct dm_hw_stat_delta __rcu *dm_private;2320#endif2321 struct device dev;2322 const struct attribute_group *sysfs_groups[4];2323 const struct attribute_group *sysfs_rx_queue_group;2324 2325 const struct rtnl_link_ops *rtnl_link_ops;2326 2327 const struct netdev_stat_ops *stat_ops;2328 2329 const struct netdev_queue_mgmt_ops *queue_mgmt_ops;2330 2331 /* for setting kernel sock attribute on TCP connection setup */2332#define GSO_MAX_SEGS 65535u2333#define GSO_LEGACY_MAX_SIZE 65536u2334/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE),2335 * and shinfo->gso_segs is a 16bit field.2336 */2337#define GSO_MAX_SIZE (8 * GSO_MAX_SEGS)2338 2339#define TSO_LEGACY_MAX_SIZE 655362340#define TSO_MAX_SIZE UINT_MAX2341 unsigned int tso_max_size;2342#define TSO_MAX_SEGS U16_MAX2343 u16 tso_max_segs;2344 2345#ifdef CONFIG_DCB2346 const struct dcbnl_rtnl_ops *dcbnl_ops;2347#endif2348 u8 prio_tc_map[TC_BITMASK + 1];2349 2350#if IS_ENABLED(CONFIG_FCOE)2351 unsigned int fcoe_ddp_xid;2352#endif2353#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)2354 struct netprio_map __rcu *priomap;2355#endif2356 struct phy_link_topology *link_topo;2357 struct phy_device *phydev;2358 struct sfp_bus *sfp_bus;2359 struct lock_class_key *qdisc_tx_busylock;2360 bool proto_down;2361 bool threaded;2362 2363 /* priv_flags_slow, ungrouped to save space */2364 unsigned long see_all_hwtstamp_requests:1;2365 unsigned long change_proto_down:1;2366 unsigned long netns_local:1;2367 unsigned long fcoe_mtu:1;2368 2369 struct list_head net_notifier_list;2370 2371#if IS_ENABLED(CONFIG_MACSEC)2372 /* MACsec management functions */2373 const struct macsec_ops *macsec_ops;2374#endif2375 const struct udp_tunnel_nic_info *udp_tunnel_nic_info;2376 struct udp_tunnel_nic *udp_tunnel_nic;2377 2378 struct ethtool_netdev_state *ethtool;2379 2380 /* protected by rtnl_lock */2381 struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE];2382 2383 u8 dev_addr_shadow[MAX_ADDR_LEN];2384 netdevice_tracker linkwatch_dev_tracker;2385 netdevice_tracker watchdog_dev_tracker;2386 netdevice_tracker dev_registered_tracker;2387 struct rtnl_hw_stats64 *offload_xstats_l3;2388 2389 struct devlink_port *devlink_port;2390 2391#if IS_ENABLED(CONFIG_DPLL)2392 struct dpll_pin __rcu *dpll_pin;2393#endif2394#if IS_ENABLED(CONFIG_PAGE_POOL)2395 /** @page_pools: page pools created for this netdevice */2396 struct hlist_head page_pools;2397#endif2398 2399 /** @irq_moder: dim parameters used if IS_ENABLED(CONFIG_DIMLIB). */2400 struct dim_irq_moder *irq_moder;2401 2402 u8 priv[] ____cacheline_aligned2403 __counted_by(priv_len);2404} ____cacheline_aligned;2405#define to_net_dev(d) container_of(d, struct net_device, dev)2406 2407/*2408 * Driver should use this to assign devlink port instance to a netdevice2409 * before it registers the netdevice. Therefore devlink_port is static2410 * during the netdev lifetime after it is registered.2411 */2412#define SET_NETDEV_DEVLINK_PORT(dev, port) \2413({ \2414 WARN_ON((dev)->reg_state != NETREG_UNINITIALIZED); \2415 ((dev)->devlink_port = (port)); \2416})2417 2418static inline bool netif_elide_gro(const struct net_device *dev)2419{2420 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)2421 return true;2422 return false;2423}2424 2425#define NETDEV_ALIGN 322426 2427static inline2428int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)2429{2430 return dev->prio_tc_map[prio & TC_BITMASK];2431}2432 2433static inline2434int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)2435{2436 if (tc >= dev->num_tc)2437 return -EINVAL;2438 2439 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;2440 return 0;2441}2442 2443int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);2444void netdev_reset_tc(struct net_device *dev);2445int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);2446int netdev_set_num_tc(struct net_device *dev, u8 num_tc);2447 2448static inline2449int netdev_get_num_tc(struct net_device *dev)2450{2451 return dev->num_tc;2452}2453 2454static inline void net_prefetch(void *p)2455{2456 prefetch(p);2457#if L1_CACHE_BYTES < 1282458 prefetch((u8 *)p + L1_CACHE_BYTES);2459#endif2460}2461 2462static inline void net_prefetchw(void *p)2463{2464 prefetchw(p);2465#if L1_CACHE_BYTES < 1282466 prefetchw((u8 *)p + L1_CACHE_BYTES);2467#endif2468}2469 2470void netdev_unbind_sb_channel(struct net_device *dev,2471 struct net_device *sb_dev);2472int netdev_bind_sb_channel_queue(struct net_device *dev,2473 struct net_device *sb_dev,2474 u8 tc, u16 count, u16 offset);2475int netdev_set_sb_channel(struct net_device *dev, u16 channel);2476static inline int netdev_get_sb_channel(struct net_device *dev)2477{2478 return max_t(int, -dev->num_tc, 0);2479}2480 2481static inline2482struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,2483 unsigned int index)2484{2485 DEBUG_NET_WARN_ON_ONCE(index >= dev->num_tx_queues);2486 return &dev->_tx[index];2487}2488 2489static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,2490 const struct sk_buff *skb)2491{2492 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));2493}2494 2495static inline void netdev_for_each_tx_queue(struct net_device *dev,2496 void (*f)(struct net_device *,2497 struct netdev_queue *,2498 void *),2499 void *arg)2500{2501 unsigned int i;2502 2503 for (i = 0; i < dev->num_tx_queues; i++)2504 f(dev, &dev->_tx[i], arg);2505}2506 2507#define netdev_lockdep_set_classes(dev) \2508{ \2509 static struct lock_class_key qdisc_tx_busylock_key; \2510 static struct lock_class_key qdisc_xmit_lock_key; \2511 static struct lock_class_key dev_addr_list_lock_key; \2512 unsigned int i; \2513 \2514 (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \2515 lockdep_set_class(&(dev)->addr_list_lock, \2516 &dev_addr_list_lock_key); \2517 for (i = 0; i < (dev)->num_tx_queues; i++) \2518 lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \2519 &qdisc_xmit_lock_key); \2520}2521 2522u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,2523 struct net_device *sb_dev);2524struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,2525 struct sk_buff *skb,2526 struct net_device *sb_dev);2527 2528/* returns the headroom that the master device needs to take in account2529 * when forwarding to this dev2530 */2531static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)2532{2533 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;2534}2535 2536static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)2537{2538 if (dev->netdev_ops->ndo_set_rx_headroom)2539 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);2540}2541 2542/* set the device rx headroom to the dev's default */2543static inline void netdev_reset_rx_headroom(struct net_device *dev)2544{2545 netdev_set_rx_headroom(dev, -1);2546}2547 2548static inline void *netdev_get_ml_priv(struct net_device *dev,2549 enum netdev_ml_priv_type type)2550{2551 if (dev->ml_priv_type != type)2552 return NULL;2553 2554 return dev->ml_priv;2555}2556 2557static inline void netdev_set_ml_priv(struct net_device *dev,2558 void *ml_priv,2559 enum netdev_ml_priv_type type)2560{2561 WARN(dev->ml_priv_type && dev->ml_priv_type != type,2562 "Overwriting already set ml_priv_type (%u) with different ml_priv_type (%u)!\n",2563 dev->ml_priv_type, type);2564 WARN(!dev->ml_priv_type && dev->ml_priv,2565 "Overwriting already set ml_priv and ml_priv_type is ML_PRIV_NONE!\n");2566 2567 dev->ml_priv = ml_priv;2568 dev->ml_priv_type = type;2569}2570 2571/*2572 * Net namespace inlines2573 */2574static inline2575struct net *dev_net(const struct net_device *dev)2576{2577 return read_pnet(&dev->nd_net);2578}2579 2580static inline2581void dev_net_set(struct net_device *dev, struct net *net)2582{2583 write_pnet(&dev->nd_net, net);2584}2585 2586/**2587 * netdev_priv - access network device private data2588 * @dev: network device2589 *2590 * Get network device private data2591 */2592static inline void *netdev_priv(const struct net_device *dev)2593{2594 return (void *)dev->priv;2595}2596 2597/* Set the sysfs physical device reference for the network logical device2598 * if set prior to registration will cause a symlink during initialization.2599 */2600#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))2601 2602/* Set the sysfs device type for the network logical device to allow2603 * fine-grained identification of different network device types. For2604 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.2605 */2606#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))2607 2608void netif_queue_set_napi(struct net_device *dev, unsigned int queue_index,2609 enum netdev_queue_type type,2610 struct napi_struct *napi);2611 2612static inline void netif_napi_set_irq(struct napi_struct *napi, int irq)2613{2614 napi->irq = irq;2615}2616 2617/* Default NAPI poll() weight2618 * Device drivers are strongly advised to not use bigger value2619 */2620#define NAPI_POLL_WEIGHT 642621 2622void netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi,2623 int (*poll)(struct napi_struct *, int), int weight);2624 2625/**2626 * netif_napi_add() - initialize a NAPI context2627 * @dev: network device2628 * @napi: NAPI context2629 * @poll: polling function2630 *2631 * netif_napi_add() must be used to initialize a NAPI context prior to calling2632 * *any* of the other NAPI-related functions.2633 */2634static inline void2635netif_napi_add(struct net_device *dev, struct napi_struct *napi,2636 int (*poll)(struct napi_struct *, int))2637{2638 netif_napi_add_weight(dev, napi, poll, NAPI_POLL_WEIGHT);2639}2640 2641static inline void2642netif_napi_add_tx_weight(struct net_device *dev,2643 struct napi_struct *napi,2644 int (*poll)(struct napi_struct *, int),2645 int weight)2646{2647 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);2648 netif_napi_add_weight(dev, napi, poll, weight);2649}2650 2651/**2652 * netif_napi_add_tx() - initialize a NAPI context to be used for Tx only2653 * @dev: network device2654 * @napi: NAPI context2655 * @poll: polling function2656 *2657 * This variant of netif_napi_add() should be used from drivers using NAPI2658 * to exclusively poll a TX queue.2659 * This will avoid we add it into napi_hash[], thus polluting this hash table.2660 */2661static inline void netif_napi_add_tx(struct net_device *dev,2662 struct napi_struct *napi,2663 int (*poll)(struct napi_struct *, int))2664{2665 netif_napi_add_tx_weight(dev, napi, poll, NAPI_POLL_WEIGHT);2666}2667 2668/**2669 * __netif_napi_del - remove a NAPI context2670 * @napi: NAPI context2671 *2672 * Warning: caller must observe RCU grace period before freeing memory2673 * containing @napi. Drivers might want to call this helper to combine2674 * all the needed RCU grace periods into a single one.2675 */2676void __netif_napi_del(struct napi_struct *napi);2677 2678/**2679 * netif_napi_del - remove a NAPI context2680 * @napi: NAPI context2681 *2682 * netif_napi_del() removes a NAPI context from the network device NAPI list2683 */2684static inline void netif_napi_del(struct napi_struct *napi)2685{2686 __netif_napi_del(napi);2687 synchronize_net();2688}2689 2690struct packet_type {2691 __be16 type; /* This is really htons(ether_type). */2692 bool ignore_outgoing;2693 struct net_device *dev; /* NULL is wildcarded here */2694 netdevice_tracker dev_tracker;2695 int (*func) (struct sk_buff *,2696 struct net_device *,2697 struct packet_type *,2698 struct net_device *);2699 void (*list_func) (struct list_head *,2700 struct packet_type *,2701 struct net_device *);2702 bool (*id_match)(struct packet_type *ptype,2703 struct sock *sk);2704 struct net *af_packet_net;2705 void *af_packet_priv;2706 struct list_head list;2707};2708 2709struct offload_callbacks {2710 struct sk_buff *(*gso_segment)(struct sk_buff *skb,2711 netdev_features_t features);2712 struct sk_buff *(*gro_receive)(struct list_head *head,2713 struct sk_buff *skb);2714 int (*gro_complete)(struct sk_buff *skb, int nhoff);2715};2716 2717struct packet_offload {2718 __be16 type; /* This is really htons(ether_type). */2719 u16 priority;2720 struct offload_callbacks callbacks;2721 struct list_head list;2722};2723 2724/* often modified stats are per-CPU, other are shared (netdev->stats) */2725struct pcpu_sw_netstats {2726 u64_stats_t rx_packets;2727 u64_stats_t rx_bytes;2728 u64_stats_t tx_packets;2729 u64_stats_t tx_bytes;2730 struct u64_stats_sync syncp;2731} __aligned(4 * sizeof(u64));2732 2733struct pcpu_dstats {2734 u64_stats_t rx_packets;2735 u64_stats_t rx_bytes;2736 u64_stats_t rx_drops;2737 u64_stats_t tx_packets;2738 u64_stats_t tx_bytes;2739 u64_stats_t tx_drops;2740 struct u64_stats_sync syncp;2741} __aligned(8 * sizeof(u64));2742 2743struct pcpu_lstats {2744 u64_stats_t packets;2745 u64_stats_t bytes;2746 struct u64_stats_sync syncp;2747} __aligned(2 * sizeof(u64));2748 2749void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);2750 2751static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len)2752{2753 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);2754 2755 u64_stats_update_begin(&tstats->syncp);2756 u64_stats_add(&tstats->rx_bytes, len);2757 u64_stats_inc(&tstats->rx_packets);2758 u64_stats_update_end(&tstats->syncp);2759}2760 2761static inline void dev_sw_netstats_tx_add(struct net_device *dev,2762 unsigned int packets,2763 unsigned int len)2764{2765 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);2766 2767 u64_stats_update_begin(&tstats->syncp);2768 u64_stats_add(&tstats->tx_bytes, len);2769 u64_stats_add(&tstats->tx_packets, packets);2770 u64_stats_update_end(&tstats->syncp);2771}2772 2773static inline void dev_lstats_add(struct net_device *dev, unsigned int len)2774{2775 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);2776 2777 u64_stats_update_begin(&lstats->syncp);2778 u64_stats_add(&lstats->bytes, len);2779 u64_stats_inc(&lstats->packets);2780 u64_stats_update_end(&lstats->syncp);2781}2782 2783#define __netdev_alloc_pcpu_stats(type, gfp) \2784({ \2785 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\2786 if (pcpu_stats) { \2787 int __cpu; \2788 for_each_possible_cpu(__cpu) { \2789 typeof(type) *stat; \2790 stat = per_cpu_ptr(pcpu_stats, __cpu); \2791 u64_stats_init(&stat->syncp); \2792 } \2793 } \2794 pcpu_stats; \2795})2796 2797#define netdev_alloc_pcpu_stats(type) \2798 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)2799 2800#define devm_netdev_alloc_pcpu_stats(dev, type) \2801({ \2802 typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\2803 if (pcpu_stats) { \2804 int __cpu; \2805 for_each_possible_cpu(__cpu) { \2806 typeof(type) *stat; \2807 stat = per_cpu_ptr(pcpu_stats, __cpu); \2808 u64_stats_init(&stat->syncp); \2809 } \2810 } \2811 pcpu_stats; \2812})2813 2814enum netdev_lag_tx_type {2815 NETDEV_LAG_TX_TYPE_UNKNOWN,2816 NETDEV_LAG_TX_TYPE_RANDOM,2817 NETDEV_LAG_TX_TYPE_BROADCAST,2818 NETDEV_LAG_TX_TYPE_ROUNDROBIN,2819 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,2820 NETDEV_LAG_TX_TYPE_HASH,2821};2822 2823enum netdev_lag_hash {2824 NETDEV_LAG_HASH_NONE,2825 NETDEV_LAG_HASH_L2,2826 NETDEV_LAG_HASH_L34,2827 NETDEV_LAG_HASH_L23,2828 NETDEV_LAG_HASH_E23,2829 NETDEV_LAG_HASH_E34,2830 NETDEV_LAG_HASH_VLAN_SRCMAC,2831 NETDEV_LAG_HASH_UNKNOWN,2832};2833 2834struct netdev_lag_upper_info {2835 enum netdev_lag_tx_type tx_type;2836 enum netdev_lag_hash hash_type;2837};2838 2839struct netdev_lag_lower_state_info {2840 u8 link_up : 1,2841 tx_enabled : 1;2842};2843 2844#include <linux/notifier.h>2845 2846/* netdevice notifier chain. Please remember to update netdev_cmd_to_name()2847 * and the rtnetlink notification exclusion list in rtnetlink_event() when2848 * adding new types.2849 */2850enum netdev_cmd {2851 NETDEV_UP = 1, /* For now you can't veto a device up/down */2852 NETDEV_DOWN,2853 NETDEV_REBOOT, /* Tell a protocol stack a network interface2854 detected a hardware crash and restarted2855 - we can use this eg to kick tcp sessions2856 once done */2857 NETDEV_CHANGE, /* Notify device state change */2858 NETDEV_REGISTER,2859 NETDEV_UNREGISTER,2860 NETDEV_CHANGEMTU, /* notify after mtu change happened */2861 NETDEV_CHANGEADDR, /* notify after the address change */2862 NETDEV_PRE_CHANGEADDR, /* notify before the address change */2863 NETDEV_GOING_DOWN,2864 NETDEV_CHANGENAME,2865 NETDEV_FEAT_CHANGE,2866 NETDEV_BONDING_FAILOVER,2867 NETDEV_PRE_UP,2868 NETDEV_PRE_TYPE_CHANGE,2869 NETDEV_POST_TYPE_CHANGE,2870 NETDEV_POST_INIT,2871 NETDEV_PRE_UNINIT,2872 NETDEV_RELEASE,2873 NETDEV_NOTIFY_PEERS,2874 NETDEV_JOIN,2875 NETDEV_CHANGEUPPER,2876 NETDEV_RESEND_IGMP,2877 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */2878 NETDEV_CHANGEINFODATA,2879 NETDEV_BONDING_INFO,2880 NETDEV_PRECHANGEUPPER,2881 NETDEV_CHANGELOWERSTATE,2882 NETDEV_UDP_TUNNEL_PUSH_INFO,2883 NETDEV_UDP_TUNNEL_DROP_INFO,2884 NETDEV_CHANGE_TX_QUEUE_LEN,2885 NETDEV_CVLAN_FILTER_PUSH_INFO,2886 NETDEV_CVLAN_FILTER_DROP_INFO,2887 NETDEV_SVLAN_FILTER_PUSH_INFO,2888 NETDEV_SVLAN_FILTER_DROP_INFO,2889 NETDEV_OFFLOAD_XSTATS_ENABLE,2890 NETDEV_OFFLOAD_XSTATS_DISABLE,2891 NETDEV_OFFLOAD_XSTATS_REPORT_USED,2892 NETDEV_OFFLOAD_XSTATS_REPORT_DELTA,2893 NETDEV_XDP_FEAT_CHANGE,2894};2895const char *netdev_cmd_to_name(enum netdev_cmd cmd);2896 2897int register_netdevice_notifier(struct notifier_block *nb);2898int unregister_netdevice_notifier(struct notifier_block *nb);2899int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);2900int unregister_netdevice_notifier_net(struct net *net,2901 struct notifier_block *nb);2902int register_netdevice_notifier_dev_net(struct net_device *dev,2903 struct notifier_block *nb,2904 struct netdev_net_notifier *nn);2905int unregister_netdevice_notifier_dev_net(struct net_device *dev,2906 struct notifier_block *nb,2907 struct netdev_net_notifier *nn);2908 2909struct netdev_notifier_info {2910 struct net_device *dev;2911 struct netlink_ext_ack *extack;2912};2913 2914struct netdev_notifier_info_ext {2915 struct netdev_notifier_info info; /* must be first */2916 union {2917 u32 mtu;2918 } ext;2919};2920 2921struct netdev_notifier_change_info {2922 struct netdev_notifier_info info; /* must be first */2923 unsigned int flags_changed;2924};2925 2926struct netdev_notifier_changeupper_info {2927 struct netdev_notifier_info info; /* must be first */2928 struct net_device *upper_dev; /* new upper dev */2929 bool master; /* is upper dev master */2930 bool linking; /* is the notification for link or unlink */2931 void *upper_info; /* upper dev info */2932};2933 2934struct netdev_notifier_changelowerstate_info {2935 struct netdev_notifier_info info; /* must be first */2936 void *lower_state_info; /* is lower dev state */2937};2938 2939struct netdev_notifier_pre_changeaddr_info {2940 struct netdev_notifier_info info; /* must be first */2941 const unsigned char *dev_addr;2942};2943 2944enum netdev_offload_xstats_type {2945 NETDEV_OFFLOAD_XSTATS_TYPE_L3 = 1,2946};2947 2948struct netdev_notifier_offload_xstats_info {2949 struct netdev_notifier_info info; /* must be first */2950 enum netdev_offload_xstats_type type;2951 2952 union {2953 /* NETDEV_OFFLOAD_XSTATS_REPORT_DELTA */2954 struct netdev_notifier_offload_xstats_rd *report_delta;2955 /* NETDEV_OFFLOAD_XSTATS_REPORT_USED */2956 struct netdev_notifier_offload_xstats_ru *report_used;2957 };2958};2959 2960int netdev_offload_xstats_enable(struct net_device *dev,2961 enum netdev_offload_xstats_type type,2962 struct netlink_ext_ack *extack);2963int netdev_offload_xstats_disable(struct net_device *dev,2964 enum netdev_offload_xstats_type type);2965bool netdev_offload_xstats_enabled(const struct net_device *dev,2966 enum netdev_offload_xstats_type type);2967int netdev_offload_xstats_get(struct net_device *dev,2968 enum netdev_offload_xstats_type type,2969 struct rtnl_hw_stats64 *stats, bool *used,2970 struct netlink_ext_ack *extack);2971void2972netdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *rd,2973 const struct rtnl_hw_stats64 *stats);2974void2975netdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *ru);2976void netdev_offload_xstats_push_delta(struct net_device *dev,2977 enum netdev_offload_xstats_type type,2978 const struct rtnl_hw_stats64 *stats);2979 2980static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,2981 struct net_device *dev)2982{2983 info->dev = dev;2984 info->extack = NULL;2985}2986 2987static inline struct net_device *2988netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)2989{2990 return info->dev;2991}2992 2993static inline struct netlink_ext_ack *2994netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)2995{2996 return info->extack;2997}2998 2999int call_netdevice_notifiers(unsigned long val, struct net_device *dev);3000int call_netdevice_notifiers_info(unsigned long val,3001 struct netdev_notifier_info *info);3002 3003#define for_each_netdev(net, d) \3004 list_for_each_entry(d, &(net)->dev_base_head, dev_list)3005#define for_each_netdev_reverse(net, d) \3006 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)3007#define for_each_netdev_rcu(net, d) \3008 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)3009#define for_each_netdev_safe(net, d, n) \3010 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)3011#define for_each_netdev_continue(net, d) \3012 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)3013#define for_each_netdev_continue_reverse(net, d) \3014 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \3015 dev_list)3016#define for_each_netdev_continue_rcu(net, d) \3017 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)3018#define for_each_netdev_in_bond_rcu(bond, slave) \3019 for_each_netdev_rcu(&init_net, slave) \3020 if (netdev_master_upper_dev_get_rcu(slave) == (bond))3021#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)3022 3023#define for_each_netdev_dump(net, d, ifindex) \3024 for (; (d = xa_find(&(net)->dev_by_index, &ifindex, \3025 ULONG_MAX, XA_PRESENT)); ifindex++)3026 3027static inline struct net_device *next_net_device(struct net_device *dev)3028{3029 struct list_head *lh;3030 struct net *net;3031 3032 net = dev_net(dev);3033 lh = dev->dev_list.next;3034 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);3035}3036 3037static inline struct net_device *next_net_device_rcu(struct net_device *dev)3038{3039 struct list_head *lh;3040 struct net *net;3041 3042 net = dev_net(dev);3043 lh = rcu_dereference(list_next_rcu(&dev->dev_list));3044 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);3045}3046 3047static inline struct net_device *first_net_device(struct net *net)3048{3049 return list_empty(&net->dev_base_head) ? NULL :3050 net_device_entry(net->dev_base_head.next);3051}3052 3053static inline struct net_device *first_net_device_rcu(struct net *net)3054{3055 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));3056 3057 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);3058}3059 3060int netdev_boot_setup_check(struct net_device *dev);3061struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,3062 const char *hwaddr);3063struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);3064void dev_add_pack(struct packet_type *pt);3065void dev_remove_pack(struct packet_type *pt);3066void __dev_remove_pack(struct packet_type *pt);3067void dev_add_offload(struct packet_offload *po);3068void dev_remove_offload(struct packet_offload *po);3069 3070int dev_get_iflink(const struct net_device *dev);3071int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);3072int dev_fill_forward_path(const struct net_device *dev, const u8 *daddr,3073 struct net_device_path_stack *stack);3074struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,3075 unsigned short mask);3076struct net_device *dev_get_by_name(struct net *net, const char *name);3077struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);3078struct net_device *__dev_get_by_name(struct net *net, const char *name);3079bool netdev_name_in_use(struct net *net, const char *name);3080int dev_alloc_name(struct net_device *dev, const char *name);3081int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);3082void dev_close(struct net_device *dev);3083void dev_close_many(struct list_head *head, bool unlink);3084void dev_disable_lro(struct net_device *dev);3085int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);3086u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,3087 struct net_device *sb_dev);3088 3089int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev);3090int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);3091 3092static inline int dev_queue_xmit(struct sk_buff *skb)3093{3094 return __dev_queue_xmit(skb, NULL);3095}3096 3097static inline int dev_queue_xmit_accel(struct sk_buff *skb,3098 struct net_device *sb_dev)3099{3100 return __dev_queue_xmit(skb, sb_dev);3101}3102 3103static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)3104{3105 int ret;3106 3107 ret = __dev_direct_xmit(skb, queue_id);3108 if (!dev_xmit_complete(ret))3109 kfree_skb(skb);3110 return ret;3111}3112 3113int register_netdevice(struct net_device *dev);3114void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);3115void unregister_netdevice_many(struct list_head *head);3116static inline void unregister_netdevice(struct net_device *dev)3117{3118 unregister_netdevice_queue(dev, NULL);3119}3120 3121int netdev_refcnt_read(const struct net_device *dev);3122void free_netdev(struct net_device *dev);3123void init_dummy_netdev(struct net_device *dev);3124 3125struct net_device *netdev_get_xmit_slave(struct net_device *dev,3126 struct sk_buff *skb,3127 bool all_slaves);3128struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev,3129 struct sock *sk);3130struct net_device *dev_get_by_index(struct net *net, int ifindex);3131struct net_device *__dev_get_by_index(struct net *net, int ifindex);3132struct net_device *netdev_get_by_index(struct net *net, int ifindex,3133 netdevice_tracker *tracker, gfp_t gfp);3134struct net_device *netdev_get_by_name(struct net *net, const char *name,3135 netdevice_tracker *tracker, gfp_t gfp);3136struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);3137struct net_device *dev_get_by_napi_id(unsigned int napi_id);3138void netdev_copy_name(struct net_device *dev, char *name);3139 3140static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,3141 unsigned short type,3142 const void *daddr, const void *saddr,3143 unsigned int len)3144{3145 if (!dev->header_ops || !dev->header_ops->create)3146 return 0;3147 3148 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);3149}3150 3151static inline int dev_parse_header(const struct sk_buff *skb,3152 unsigned char *haddr)3153{3154 const struct net_device *dev = skb->dev;3155 3156 if (!dev->header_ops || !dev->header_ops->parse)3157 return 0;3158 return dev->header_ops->parse(skb, haddr);3159}3160 3161static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)3162{3163 const struct net_device *dev = skb->dev;3164 3165 if (!dev->header_ops || !dev->header_ops->parse_protocol)3166 return 0;3167 return dev->header_ops->parse_protocol(skb);3168}3169 3170/* ll_header must have at least hard_header_len allocated */3171static inline bool dev_validate_header(const struct net_device *dev,3172 char *ll_header, int len)3173{3174 if (likely(len >= dev->hard_header_len))3175 return true;3176 if (len < dev->min_header_len)3177 return false;3178 3179 if (capable(CAP_SYS_RAWIO)) {3180 memset(ll_header + len, 0, dev->hard_header_len - len);3181 return true;3182 }3183 3184 if (dev->header_ops && dev->header_ops->validate)3185 return dev->header_ops->validate(ll_header, len);3186 3187 return false;3188}3189 3190static inline bool dev_has_header(const struct net_device *dev)3191{3192 return dev->header_ops && dev->header_ops->create;3193}3194 3195/*3196 * Incoming packets are placed on per-CPU queues3197 */3198struct softnet_data {3199 struct list_head poll_list;3200 struct sk_buff_head process_queue;3201 local_lock_t process_queue_bh_lock;3202 3203 /* stats */3204 unsigned int processed;3205 unsigned int time_squeeze;3206#ifdef CONFIG_RPS3207 struct softnet_data *rps_ipi_list;3208#endif3209 3210 unsigned int received_rps;3211 bool in_net_rx_action;3212 bool in_napi_threaded_poll;3213 3214#ifdef CONFIG_NET_FLOW_LIMIT3215 struct sd_flow_limit __rcu *flow_limit;3216#endif3217 struct Qdisc *output_queue;3218 struct Qdisc **output_queue_tailp;3219 struct sk_buff *completion_queue;3220#ifdef CONFIG_XFRM_OFFLOAD3221 struct sk_buff_head xfrm_backlog;3222#endif3223 /* written and read only by owning cpu: */3224 struct netdev_xmit xmit;3225#ifdef CONFIG_RPS3226 /* input_queue_head should be written by cpu owning this struct,3227 * and only read by other cpus. Worth using a cache line.3228 */3229 unsigned int input_queue_head ____cacheline_aligned_in_smp;3230 3231 /* Elements below can be accessed between CPUs for RPS/RFS */3232 call_single_data_t csd ____cacheline_aligned_in_smp;3233 struct softnet_data *rps_ipi_next;3234 unsigned int cpu;3235 unsigned int input_queue_tail;3236#endif3237 struct sk_buff_head input_pkt_queue;3238 struct napi_struct backlog;3239 3240 atomic_t dropped ____cacheline_aligned_in_smp;3241 3242 /* Another possibly contended cache line */3243 spinlock_t defer_lock ____cacheline_aligned_in_smp;3244 int defer_count;3245 int defer_ipi_scheduled;3246 struct sk_buff *defer_list;3247 call_single_data_t defer_csd;3248};3249 3250DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);3251 3252#ifndef CONFIG_PREEMPT_RT3253static inline int dev_recursion_level(void)3254{3255 return this_cpu_read(softnet_data.xmit.recursion);3256}3257#else3258static inline int dev_recursion_level(void)3259{3260 return current->net_xmit.recursion;3261}3262 3263#endif3264 3265void __netif_schedule(struct Qdisc *q);3266void netif_schedule_queue(struct netdev_queue *txq);3267 3268static inline void netif_tx_schedule_all(struct net_device *dev)3269{3270 unsigned int i;3271 3272 for (i = 0; i < dev->num_tx_queues; i++)3273 netif_schedule_queue(netdev_get_tx_queue(dev, i));3274}3275 3276static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)3277{3278 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);3279}3280 3281/**3282 * netif_start_queue - allow transmit3283 * @dev: network device3284 *3285 * Allow upper layers to call the device hard_start_xmit routine.3286 */3287static inline void netif_start_queue(struct net_device *dev)3288{3289 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));3290}3291 3292static inline void netif_tx_start_all_queues(struct net_device *dev)3293{3294 unsigned int i;3295 3296 for (i = 0; i < dev->num_tx_queues; i++) {3297 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);3298 netif_tx_start_queue(txq);3299 }3300}3301 3302void netif_tx_wake_queue(struct netdev_queue *dev_queue);3303 3304/**3305 * netif_wake_queue - restart transmit3306 * @dev: network device3307 *3308 * Allow upper layers to call the device hard_start_xmit routine.3309 * Used for flow control when transmit resources are available.3310 */3311static inline void netif_wake_queue(struct net_device *dev)3312{3313 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));3314}3315 3316static inline void netif_tx_wake_all_queues(struct net_device *dev)3317{3318 unsigned int i;3319 3320 for (i = 0; i < dev->num_tx_queues; i++) {3321 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);3322 netif_tx_wake_queue(txq);3323 }3324}3325 3326static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)3327{3328 /* Paired with READ_ONCE() from dev_watchdog() */3329 WRITE_ONCE(dev_queue->trans_start, jiffies);3330 3331 /* This barrier is paired with smp_mb() from dev_watchdog() */3332 smp_mb__before_atomic();3333 3334 /* Must be an atomic op see netif_txq_try_stop() */3335 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);3336}3337 3338/**3339 * netif_stop_queue - stop transmitted packets3340 * @dev: network device3341 *3342 * Stop upper layers calling the device hard_start_xmit routine.3343 * Used for flow control when transmit resources are unavailable.3344 */3345static inline void netif_stop_queue(struct net_device *dev)3346{3347 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));3348}3349 3350void netif_tx_stop_all_queues(struct net_device *dev);3351 3352static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)3353{3354 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);3355}3356 3357/**3358 * netif_queue_stopped - test if transmit queue is flowblocked3359 * @dev: network device3360 *3361 * Test if transmit queue on device is currently unable to send.3362 */3363static inline bool netif_queue_stopped(const struct net_device *dev)3364{3365 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));3366}3367 3368static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)3369{3370 return dev_queue->state & QUEUE_STATE_ANY_XOFF;3371}3372 3373static inline bool3374netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)3375{3376 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;3377}3378 3379static inline bool3380netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)3381{3382 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;3383}3384 3385/**3386 * netdev_queue_set_dql_min_limit - set dql minimum limit3387 * @dev_queue: pointer to transmit queue3388 * @min_limit: dql minimum limit3389 *3390 * Forces xmit_more() to return true until the minimum threshold3391 * defined by @min_limit is reached (or until the tx queue is3392 * empty). Warning: to be use with care, misuse will impact the3393 * latency.3394 */3395static inline void netdev_queue_set_dql_min_limit(struct netdev_queue *dev_queue,3396 unsigned int min_limit)3397{3398#ifdef CONFIG_BQL3399 dev_queue->dql.min_limit = min_limit;3400#endif3401}3402 3403static inline int netdev_queue_dql_avail(const struct netdev_queue *txq)3404{3405#ifdef CONFIG_BQL3406 /* Non-BQL migrated drivers will return 0, too. */3407 return dql_avail(&txq->dql);3408#else3409 return 0;3410#endif3411}3412 3413/**3414 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write3415 * @dev_queue: pointer to transmit queue3416 *3417 * BQL enabled drivers might use this helper in their ndo_start_xmit(),3418 * to give appropriate hint to the CPU.3419 */3420static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)3421{3422#ifdef CONFIG_BQL3423 prefetchw(&dev_queue->dql.num_queued);3424#endif3425}3426 3427/**3428 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write3429 * @dev_queue: pointer to transmit queue3430 *3431 * BQL enabled drivers might use this helper in their TX completion path,3432 * to give appropriate hint to the CPU.3433 */3434static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)3435{3436#ifdef CONFIG_BQL3437 prefetchw(&dev_queue->dql.limit);3438#endif3439}3440 3441/**3442 * netdev_tx_sent_queue - report the number of bytes queued to a given tx queue3443 * @dev_queue: network device queue3444 * @bytes: number of bytes queued to the device queue3445 *3446 * Report the number of bytes queued for sending/completion to the network3447 * device hardware queue. @bytes should be a good approximation and should3448 * exactly match netdev_completed_queue() @bytes.3449 * This is typically called once per packet, from ndo_start_xmit().3450 */3451static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,3452 unsigned int bytes)3453{3454#ifdef CONFIG_BQL3455 dql_queued(&dev_queue->dql, bytes);3456 3457 if (likely(dql_avail(&dev_queue->dql) >= 0))3458 return;3459 3460 /* Paired with READ_ONCE() from dev_watchdog() */3461 WRITE_ONCE(dev_queue->trans_start, jiffies);3462 3463 /* This barrier is paired with smp_mb() from dev_watchdog() */3464 smp_mb__before_atomic();3465 3466 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);3467 3468 /*3469 * The XOFF flag must be set before checking the dql_avail below,3470 * because in netdev_tx_completed_queue we update the dql_completed3471 * before checking the XOFF flag.3472 */3473 smp_mb();3474 3475 /* check again in case another CPU has just made room avail */3476 if (unlikely(dql_avail(&dev_queue->dql) >= 0))3477 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);3478#endif3479}3480 3481/* Variant of netdev_tx_sent_queue() for drivers that are aware3482 * that they should not test BQL status themselves.3483 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last3484 * skb of a batch.3485 * Returns true if the doorbell must be used to kick the NIC.3486 */3487static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,3488 unsigned int bytes,3489 bool xmit_more)3490{3491 if (xmit_more) {3492#ifdef CONFIG_BQL3493 dql_queued(&dev_queue->dql, bytes);3494#endif3495 return netif_tx_queue_stopped(dev_queue);3496 }3497 netdev_tx_sent_queue(dev_queue, bytes);3498 return true;3499}3500 3501/**3502 * netdev_sent_queue - report the number of bytes queued to hardware3503 * @dev: network device3504 * @bytes: number of bytes queued to the hardware device queue3505 *3506 * Report the number of bytes queued for sending/completion to the network3507 * device hardware queue#0. @bytes should be a good approximation and should3508 * exactly match netdev_completed_queue() @bytes.3509 * This is typically called once per packet, from ndo_start_xmit().3510 */3511static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)3512{3513 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);3514}3515 3516static inline bool __netdev_sent_queue(struct net_device *dev,3517 unsigned int bytes,3518 bool xmit_more)3519{3520 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,3521 xmit_more);3522}3523 3524/**3525 * netdev_tx_completed_queue - report number of packets/bytes at TX completion.3526 * @dev_queue: network device queue3527 * @pkts: number of packets (currently ignored)3528 * @bytes: number of bytes dequeued from the device queue3529 *3530 * Must be called at most once per TX completion round (and not per3531 * individual packet), so that BQL can adjust its limits appropriately.3532 */3533static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,3534 unsigned int pkts, unsigned int bytes)3535{3536#ifdef CONFIG_BQL3537 if (unlikely(!bytes))3538 return;3539 3540 dql_completed(&dev_queue->dql, bytes);3541 3542 /*3543 * Without the memory barrier there is a small possibility that3544 * netdev_tx_sent_queue will miss the update and cause the queue to3545 * be stopped forever3546 */3547 smp_mb(); /* NOTE: netdev_txq_completed_mb() assumes this exists */3548 3549 if (unlikely(dql_avail(&dev_queue->dql) < 0))3550 return;3551 3552 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))3553 netif_schedule_queue(dev_queue);3554#endif3555}3556 3557/**3558 * netdev_completed_queue - report bytes and packets completed by device3559 * @dev: network device3560 * @pkts: actual number of packets sent over the medium3561 * @bytes: actual number of bytes sent over the medium3562 *3563 * Report the number of bytes and packets transmitted by the network device3564 * hardware queue over the physical medium, @bytes must exactly match the3565 * @bytes amount passed to netdev_sent_queue()3566 */3567static inline void netdev_completed_queue(struct net_device *dev,3568 unsigned int pkts, unsigned int bytes)3569{3570 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);3571}3572 3573static inline void netdev_tx_reset_queue(struct netdev_queue *q)3574{3575#ifdef CONFIG_BQL3576 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);3577 dql_reset(&q->dql);3578#endif3579}3580 3581/**3582 * netdev_tx_reset_subqueue - reset the BQL stats and state of a netdev queue3583 * @dev: network device3584 * @qid: stack index of the queue to reset3585 */3586static inline void netdev_tx_reset_subqueue(const struct net_device *dev,3587 u32 qid)3588{3589 netdev_tx_reset_queue(netdev_get_tx_queue(dev, qid));3590}3591 3592/**3593 * netdev_reset_queue - reset the packets and bytes count of a network device3594 * @dev_queue: network device3595 *3596 * Reset the bytes and packet count of a network device and clear the3597 * software flow control OFF bit for this network device3598 */3599static inline void netdev_reset_queue(struct net_device *dev_queue)3600{3601 netdev_tx_reset_subqueue(dev_queue, 0);3602}3603 3604/**3605 * netdev_cap_txqueue - check if selected tx queue exceeds device queues3606 * @dev: network device3607 * @queue_index: given tx queue index3608 *3609 * Returns 0 if given tx queue index >= number of device tx queues,3610 * otherwise returns the originally passed tx queue index.3611 */3612static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)3613{3614 if (unlikely(queue_index >= dev->real_num_tx_queues)) {3615 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",3616 dev->name, queue_index,3617 dev->real_num_tx_queues);3618 return 0;3619 }3620 3621 return queue_index;3622}3623 3624/**3625 * netif_running - test if up3626 * @dev: network device3627 *3628 * Test if the device has been brought up.3629 */3630static inline bool netif_running(const struct net_device *dev)3631{3632 return test_bit(__LINK_STATE_START, &dev->state);3633}3634 3635/*3636 * Routines to manage the subqueues on a device. We only need start,3637 * stop, and a check if it's stopped. All other device management is3638 * done at the overall netdevice level.3639 * Also test the device if we're multiqueue.3640 */3641 3642/**3643 * netif_start_subqueue - allow sending packets on subqueue3644 * @dev: network device3645 * @queue_index: sub queue index3646 *3647 * Start individual transmit queue of a device with multiple transmit queues.3648 */3649static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)3650{3651 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);3652 3653 netif_tx_start_queue(txq);3654}3655 3656/**3657 * netif_stop_subqueue - stop sending packets on subqueue3658 * @dev: network device3659 * @queue_index: sub queue index3660 *3661 * Stop individual transmit queue of a device with multiple transmit queues.3662 */3663static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)3664{3665 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);3666 netif_tx_stop_queue(txq);3667}3668 3669/**3670 * __netif_subqueue_stopped - test status of subqueue3671 * @dev: network device3672 * @queue_index: sub queue index3673 *3674 * Check individual transmit queue of a device with multiple transmit queues.3675 */3676static inline bool __netif_subqueue_stopped(const struct net_device *dev,3677 u16 queue_index)3678{3679 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);3680 3681 return netif_tx_queue_stopped(txq);3682}3683 3684/**3685 * netif_subqueue_stopped - test status of subqueue3686 * @dev: network device3687 * @skb: sub queue buffer pointer3688 *3689 * Check individual transmit queue of a device with multiple transmit queues.3690 */3691static inline bool netif_subqueue_stopped(const struct net_device *dev,3692 struct sk_buff *skb)3693{3694 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));3695}3696 3697/**3698 * netif_wake_subqueue - allow sending packets on subqueue3699 * @dev: network device3700 * @queue_index: sub queue index3701 *3702 * Resume individual transmit queue of a device with multiple transmit queues.3703 */3704static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)3705{3706 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);3707 3708 netif_tx_wake_queue(txq);3709}3710 3711#ifdef CONFIG_XPS3712int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,3713 u16 index);3714int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,3715 u16 index, enum xps_map_type type);3716 3717/**3718 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask3719 * @j: CPU/Rx queue index3720 * @mask: bitmask of all cpus/rx queues3721 * @nr_bits: number of bits in the bitmask3722 *3723 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.3724 */3725static inline bool netif_attr_test_mask(unsigned long j,3726 const unsigned long *mask,3727 unsigned int nr_bits)3728{3729 cpu_max_bits_warn(j, nr_bits);3730 return test_bit(j, mask);3731}3732 3733/**3734 * netif_attr_test_online - Test for online CPU/Rx queue3735 * @j: CPU/Rx queue index3736 * @online_mask: bitmask for CPUs/Rx queues that are online3737 * @nr_bits: number of bits in the bitmask3738 *3739 * Returns true if a CPU/Rx queue is online.3740 */3741static inline bool netif_attr_test_online(unsigned long j,3742 const unsigned long *online_mask,3743 unsigned int nr_bits)3744{3745 cpu_max_bits_warn(j, nr_bits);3746 3747 if (online_mask)3748 return test_bit(j, online_mask);3749 3750 return (j < nr_bits);3751}3752 3753/**3754 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask3755 * @n: CPU/Rx queue index3756 * @srcp: the cpumask/Rx queue mask pointer3757 * @nr_bits: number of bits in the bitmask3758 *3759 * Returns >= nr_bits if no further CPUs/Rx queues set.3760 */3761static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,3762 unsigned int nr_bits)3763{3764 /* -1 is a legal arg here. */3765 if (n != -1)3766 cpu_max_bits_warn(n, nr_bits);3767 3768 if (srcp)3769 return find_next_bit(srcp, nr_bits, n + 1);3770 3771 return n + 1;3772}3773 3774/**3775 * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p3776 * @n: CPU/Rx queue index3777 * @src1p: the first CPUs/Rx queues mask pointer3778 * @src2p: the second CPUs/Rx queues mask pointer3779 * @nr_bits: number of bits in the bitmask3780 *3781 * Returns >= nr_bits if no further CPUs/Rx queues set in both.3782 */3783static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,3784 const unsigned long *src2p,3785 unsigned int nr_bits)3786{3787 /* -1 is a legal arg here. */3788 if (n != -1)3789 cpu_max_bits_warn(n, nr_bits);3790 3791 if (src1p && src2p)3792 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);3793 else if (src1p)3794 return find_next_bit(src1p, nr_bits, n + 1);3795 else if (src2p)3796 return find_next_bit(src2p, nr_bits, n + 1);3797 3798 return n + 1;3799}3800#else3801static inline int netif_set_xps_queue(struct net_device *dev,3802 const struct cpumask *mask,3803 u16 index)3804{3805 return 0;3806}3807 3808static inline int __netif_set_xps_queue(struct net_device *dev,3809 const unsigned long *mask,3810 u16 index, enum xps_map_type type)3811{3812 return 0;3813}3814#endif3815 3816/**3817 * netif_is_multiqueue - test if device has multiple transmit queues3818 * @dev: network device3819 *3820 * Check if device has multiple transmit queues3821 */3822static inline bool netif_is_multiqueue(const struct net_device *dev)3823{3824 return dev->num_tx_queues > 1;3825}3826 3827int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);3828 3829#ifdef CONFIG_SYSFS3830int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);3831#else3832static inline int netif_set_real_num_rx_queues(struct net_device *dev,3833 unsigned int rxqs)3834{3835 dev->real_num_rx_queues = rxqs;3836 return 0;3837}3838#endif3839int netif_set_real_num_queues(struct net_device *dev,3840 unsigned int txq, unsigned int rxq);3841 3842int netif_get_num_default_rss_queues(void);3843 3844void dev_kfree_skb_irq_reason(struct sk_buff *skb, enum skb_drop_reason reason);3845void dev_kfree_skb_any_reason(struct sk_buff *skb, enum skb_drop_reason reason);3846 3847/*3848 * It is not allowed to call kfree_skb() or consume_skb() from hardware3849 * interrupt context or with hardware interrupts being disabled.3850 * (in_hardirq() || irqs_disabled())3851 *3852 * We provide four helpers that can be used in following contexts :3853 *3854 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,3855 * replacing kfree_skb(skb)3856 *3857 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.3858 * Typically used in place of consume_skb(skb) in TX completion path3859 *3860 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,3861 * replacing kfree_skb(skb)3862 *3863 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,3864 * and consumed a packet. Used in place of consume_skb(skb)3865 */3866static inline void dev_kfree_skb_irq(struct sk_buff *skb)3867{3868 dev_kfree_skb_irq_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED);3869}3870 3871static inline void dev_consume_skb_irq(struct sk_buff *skb)3872{3873 dev_kfree_skb_irq_reason(skb, SKB_CONSUMED);3874}3875 3876static inline void dev_kfree_skb_any(struct sk_buff *skb)3877{3878 dev_kfree_skb_any_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED);3879}3880 3881static inline void dev_consume_skb_any(struct sk_buff *skb)3882{3883 dev_kfree_skb_any_reason(skb, SKB_CONSUMED);3884}3885 3886u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp,3887 struct bpf_prog *xdp_prog);3888void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);3889int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff **pskb);3890int netif_rx(struct sk_buff *skb);3891int __netif_rx(struct sk_buff *skb);3892 3893int netif_receive_skb(struct sk_buff *skb);3894int netif_receive_skb_core(struct sk_buff *skb);3895void netif_receive_skb_list_internal(struct list_head *head);3896void netif_receive_skb_list(struct list_head *head);3897gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);3898void napi_gro_flush(struct napi_struct *napi, bool flush_old);3899struct sk_buff *napi_get_frags(struct napi_struct *napi);3900void napi_get_frags_check(struct napi_struct *napi);3901gro_result_t napi_gro_frags(struct napi_struct *napi);3902 3903static inline void napi_free_frags(struct napi_struct *napi)3904{3905 kfree_skb(napi->skb);3906 napi->skb = NULL;3907}3908 3909bool netdev_is_rx_handler_busy(struct net_device *dev);3910int netdev_rx_handler_register(struct net_device *dev,3911 rx_handler_func_t *rx_handler,3912 void *rx_handler_data);3913void netdev_rx_handler_unregister(struct net_device *dev);3914 3915bool dev_valid_name(const char *name);3916static inline bool is_socket_ioctl_cmd(unsigned int cmd)3917{3918 return _IOC_TYPE(cmd) == SOCK_IOC_TYPE;3919}3920int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg);3921int put_user_ifreq(struct ifreq *ifr, void __user *arg);3922int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,3923 void __user *data, bool *need_copyout);3924int dev_ifconf(struct net *net, struct ifconf __user *ifc);3925int generic_hwtstamp_get_lower(struct net_device *dev,3926 struct kernel_hwtstamp_config *kernel_cfg);3927int generic_hwtstamp_set_lower(struct net_device *dev,3928 struct kernel_hwtstamp_config *kernel_cfg,3929 struct netlink_ext_ack *extack);3930int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *userdata);3931unsigned int dev_get_flags(const struct net_device *);3932int __dev_change_flags(struct net_device *dev, unsigned int flags,3933 struct netlink_ext_ack *extack);3934int dev_change_flags(struct net_device *dev, unsigned int flags,3935 struct netlink_ext_ack *extack);3936int dev_set_alias(struct net_device *, const char *, size_t);3937int dev_get_alias(const struct net_device *, char *, size_t);3938int __dev_change_net_namespace(struct net_device *dev, struct net *net,3939 const char *pat, int new_ifindex);3940static inline3941int dev_change_net_namespace(struct net_device *dev, struct net *net,3942 const char *pat)3943{3944 return __dev_change_net_namespace(dev, net, pat, 0);3945}3946int __dev_set_mtu(struct net_device *, int);3947int dev_set_mtu(struct net_device *, int);3948int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,3949 struct netlink_ext_ack *extack);3950int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,3951 struct netlink_ext_ack *extack);3952int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa,3953 struct netlink_ext_ack *extack);3954int dev_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name);3955int dev_get_port_parent_id(struct net_device *dev,3956 struct netdev_phys_item_id *ppid, bool recurse);3957bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);3958 3959struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);3960struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,3961 struct netdev_queue *txq, int *ret);3962 3963int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);3964u8 dev_xdp_prog_count(struct net_device *dev);3965int dev_xdp_propagate(struct net_device *dev, struct netdev_bpf *bpf);3966u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode);3967 3968u32 dev_get_min_mp_channel_count(const struct net_device *dev);3969 3970int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);3971int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);3972int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb);3973bool is_skb_forwardable(const struct net_device *dev,3974 const struct sk_buff *skb);3975 3976static __always_inline bool __is_skb_forwardable(const struct net_device *dev,3977 const struct sk_buff *skb,3978 const bool check_mtu)3979{3980 const u32 vlan_hdr_len = 4; /* VLAN_HLEN */3981 unsigned int len;3982 3983 if (!(dev->flags & IFF_UP))3984 return false;3985 3986 if (!check_mtu)3987 return true;3988 3989 len = dev->mtu + dev->hard_header_len + vlan_hdr_len;3990 if (skb->len <= len)3991 return true;3992 3993 /* if TSO is enabled, we don't care about the length as the packet3994 * could be forwarded without being segmented before3995 */3996 if (skb_is_gso(skb))3997 return true;3998 3999 return false;4000}4001 4002void netdev_core_stats_inc(struct net_device *dev, u32 offset);4003 4004#define DEV_CORE_STATS_INC(FIELD) \4005static inline void dev_core_stats_##FIELD##_inc(struct net_device *dev) \4006{ \4007 netdev_core_stats_inc(dev, \4008 offsetof(struct net_device_core_stats, FIELD)); \4009}4010DEV_CORE_STATS_INC(rx_dropped)4011DEV_CORE_STATS_INC(tx_dropped)4012DEV_CORE_STATS_INC(rx_nohandler)4013DEV_CORE_STATS_INC(rx_otherhost_dropped)4014#undef DEV_CORE_STATS_INC4015 4016static __always_inline int ____dev_forward_skb(struct net_device *dev,4017 struct sk_buff *skb,4018 const bool check_mtu)4019{4020 if (skb_orphan_frags(skb, GFP_ATOMIC) ||4021 unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) {4022 dev_core_stats_rx_dropped_inc(dev);4023 kfree_skb(skb);4024 return NET_RX_DROP;4025 }4026 4027 skb_scrub_packet(skb, !net_eq(dev_net(dev), dev_net(skb->dev)));4028 skb->priority = 0;4029 return 0;4030}4031 4032bool dev_nit_active(struct net_device *dev);4033void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);4034 4035static inline void __dev_put(struct net_device *dev)4036{4037 if (dev) {4038#ifdef CONFIG_PCPU_DEV_REFCNT4039 this_cpu_dec(*dev->pcpu_refcnt);4040#else4041 refcount_dec(&dev->dev_refcnt);4042#endif4043 }4044}4045 4046static inline void __dev_hold(struct net_device *dev)4047{4048 if (dev) {4049#ifdef CONFIG_PCPU_DEV_REFCNT4050 this_cpu_inc(*dev->pcpu_refcnt);4051#else4052 refcount_inc(&dev->dev_refcnt);4053#endif4054 }4055}4056 4057static inline void __netdev_tracker_alloc(struct net_device *dev,4058 netdevice_tracker *tracker,4059 gfp_t gfp)4060{4061#ifdef CONFIG_NET_DEV_REFCNT_TRACKER4062 ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp);4063#endif4064}4065 4066/* netdev_tracker_alloc() can upgrade a prior untracked reference4067 * taken by dev_get_by_name()/dev_get_by_index() to a tracked one.4068 */4069static inline void netdev_tracker_alloc(struct net_device *dev,4070 netdevice_tracker *tracker, gfp_t gfp)4071{4072#ifdef CONFIG_NET_DEV_REFCNT_TRACKER4073 refcount_dec(&dev->refcnt_tracker.no_tracker);4074 __netdev_tracker_alloc(dev, tracker, gfp);4075#endif4076}4077 4078static inline void netdev_tracker_free(struct net_device *dev,4079 netdevice_tracker *tracker)4080{4081#ifdef CONFIG_NET_DEV_REFCNT_TRACKER4082 ref_tracker_free(&dev->refcnt_tracker, tracker);4083#endif4084}4085 4086static inline void netdev_hold(struct net_device *dev,4087 netdevice_tracker *tracker, gfp_t gfp)4088{4089 if (dev) {4090 __dev_hold(dev);4091 __netdev_tracker_alloc(dev, tracker, gfp);4092 }4093}4094 4095static inline void netdev_put(struct net_device *dev,4096 netdevice_tracker *tracker)4097{4098 if (dev) {4099 netdev_tracker_free(dev, tracker);4100 __dev_put(dev);4101 }4102}4103 4104/**4105 * dev_hold - get reference to device4106 * @dev: network device4107 *4108 * Hold reference to device to keep it from being freed.4109 * Try using netdev_hold() instead.4110 */4111static inline void dev_hold(struct net_device *dev)4112{4113 netdev_hold(dev, NULL, GFP_ATOMIC);4114}4115 4116/**4117 * dev_put - release reference to device4118 * @dev: network device4119 *4120 * Release reference to device to allow it to be freed.4121 * Try using netdev_put() instead.4122 */4123static inline void dev_put(struct net_device *dev)4124{4125 netdev_put(dev, NULL);4126}4127 4128DEFINE_FREE(dev_put, struct net_device *, if (_T) dev_put(_T))4129 4130static inline void netdev_ref_replace(struct net_device *odev,4131 struct net_device *ndev,4132 netdevice_tracker *tracker,4133 gfp_t gfp)4134{4135 if (odev)4136 netdev_tracker_free(odev, tracker);4137 4138 __dev_hold(ndev);4139 __dev_put(odev);4140 4141 if (ndev)4142 __netdev_tracker_alloc(ndev, tracker, gfp);4143}4144 4145/* Carrier loss detection, dial on demand. The functions netif_carrier_on4146 * and _off may be called from IRQ context, but it is caller4147 * who is responsible for serialization of these calls.4148 *4149 * The name carrier is inappropriate, these functions should really be4150 * called netif_lowerlayer_*() because they represent the state of any4151 * kind of lower layer not just hardware media.4152 */4153void linkwatch_fire_event(struct net_device *dev);4154 4155/**4156 * linkwatch_sync_dev - sync linkwatch for the given device4157 * @dev: network device to sync linkwatch for4158 *4159 * Sync linkwatch for the given device, removing it from the4160 * pending work list (if queued).4161 */4162void linkwatch_sync_dev(struct net_device *dev);4163 4164/**4165 * netif_carrier_ok - test if carrier present4166 * @dev: network device4167 *4168 * Check if carrier is present on device4169 */4170static inline bool netif_carrier_ok(const struct net_device *dev)4171{4172 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);4173}4174 4175unsigned long dev_trans_start(struct net_device *dev);4176 4177void __netdev_watchdog_up(struct net_device *dev);4178 4179void netif_carrier_on(struct net_device *dev);4180void netif_carrier_off(struct net_device *dev);4181void netif_carrier_event(struct net_device *dev);4182 4183/**4184 * netif_dormant_on - mark device as dormant.4185 * @dev: network device4186 *4187 * Mark device as dormant (as per RFC2863).4188 *4189 * The dormant state indicates that the relevant interface is not4190 * actually in a condition to pass packets (i.e., it is not 'up') but is4191 * in a "pending" state, waiting for some external event. For "on-4192 * demand" interfaces, this new state identifies the situation where the4193 * interface is waiting for events to place it in the up state.4194 */4195static inline void netif_dormant_on(struct net_device *dev)4196{4197 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))4198 linkwatch_fire_event(dev);4199}4200 4201/**4202 * netif_dormant_off - set device as not dormant.4203 * @dev: network device4204 *4205 * Device is not in dormant state.4206 */4207static inline void netif_dormant_off(struct net_device *dev)4208{4209 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))4210 linkwatch_fire_event(dev);4211}4212 4213/**4214 * netif_dormant - test if device is dormant4215 * @dev: network device4216 *4217 * Check if device is dormant.4218 */4219static inline bool netif_dormant(const struct net_device *dev)4220{4221 return test_bit(__LINK_STATE_DORMANT, &dev->state);4222}4223 4224 4225/**4226 * netif_testing_on - mark device as under test.4227 * @dev: network device4228 *4229 * Mark device as under test (as per RFC2863).4230 *4231 * The testing state indicates that some test(s) must be performed on4232 * the interface. After completion, of the test, the interface state4233 * will change to up, dormant, or down, as appropriate.4234 */4235static inline void netif_testing_on(struct net_device *dev)4236{4237 if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state))4238 linkwatch_fire_event(dev);4239}4240 4241/**4242 * netif_testing_off - set device as not under test.4243 * @dev: network device4244 *4245 * Device is not in testing state.4246 */4247static inline void netif_testing_off(struct net_device *dev)4248{4249 if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state))4250 linkwatch_fire_event(dev);4251}4252 4253/**4254 * netif_testing - test if device is under test4255 * @dev: network device4256 *4257 * Check if device is under test4258 */4259static inline bool netif_testing(const struct net_device *dev)4260{4261 return test_bit(__LINK_STATE_TESTING, &dev->state);4262}4263 4264 4265/**4266 * netif_oper_up - test if device is operational4267 * @dev: network device4268 *4269 * Check if carrier is operational4270 */4271static inline bool netif_oper_up(const struct net_device *dev)4272{4273 unsigned int operstate = READ_ONCE(dev->operstate);4274 4275 return operstate == IF_OPER_UP ||4276 operstate == IF_OPER_UNKNOWN /* backward compat */;4277}4278 4279/**4280 * netif_device_present - is device available or removed4281 * @dev: network device4282 *4283 * Check if device has not been removed from system.4284 */4285static inline bool netif_device_present(const struct net_device *dev)4286{4287 return test_bit(__LINK_STATE_PRESENT, &dev->state);4288}4289 4290void netif_device_detach(struct net_device *dev);4291 4292void netif_device_attach(struct net_device *dev);4293 4294/*4295 * Network interface message level settings4296 */4297 4298enum {4299 NETIF_MSG_DRV_BIT,4300 NETIF_MSG_PROBE_BIT,4301 NETIF_MSG_LINK_BIT,4302 NETIF_MSG_TIMER_BIT,4303 NETIF_MSG_IFDOWN_BIT,4304 NETIF_MSG_IFUP_BIT,4305 NETIF_MSG_RX_ERR_BIT,4306 NETIF_MSG_TX_ERR_BIT,4307 NETIF_MSG_TX_QUEUED_BIT,4308 NETIF_MSG_INTR_BIT,4309 NETIF_MSG_TX_DONE_BIT,4310 NETIF_MSG_RX_STATUS_BIT,4311 NETIF_MSG_PKTDATA_BIT,4312 NETIF_MSG_HW_BIT,4313 NETIF_MSG_WOL_BIT,4314 4315 /* When you add a new bit above, update netif_msg_class_names array4316 * in net/ethtool/common.c4317 */4318 NETIF_MSG_CLASS_COUNT,4319};4320/* Both ethtool_ops interface and internal driver implementation use u32 */4321static_assert(NETIF_MSG_CLASS_COUNT <= 32);4322 4323#define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))4324#define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)4325 4326#define NETIF_MSG_DRV __NETIF_MSG(DRV)4327#define NETIF_MSG_PROBE __NETIF_MSG(PROBE)4328#define NETIF_MSG_LINK __NETIF_MSG(LINK)4329#define NETIF_MSG_TIMER __NETIF_MSG(TIMER)4330#define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)4331#define NETIF_MSG_IFUP __NETIF_MSG(IFUP)4332#define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)4333#define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)4334#define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)4335#define NETIF_MSG_INTR __NETIF_MSG(INTR)4336#define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)4337#define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)4338#define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)4339#define NETIF_MSG_HW __NETIF_MSG(HW)4340#define NETIF_MSG_WOL __NETIF_MSG(WOL)4341 4342#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)4343#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)4344#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)4345#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)4346#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)4347#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)4348#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)4349#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)4350#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)4351#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)4352#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)4353#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)4354#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)4355#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)4356#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)4357 4358static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)4359{4360 /* use default */4361 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))4362 return default_msg_enable_bits;4363 if (debug_value == 0) /* no output */4364 return 0;4365 /* set low N bits */4366 return (1U << debug_value) - 1;4367}4368 4369static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)4370{4371 spin_lock(&txq->_xmit_lock);4372 /* Pairs with READ_ONCE() in __dev_queue_xmit() */4373 WRITE_ONCE(txq->xmit_lock_owner, cpu);4374}4375 4376static inline bool __netif_tx_acquire(struct netdev_queue *txq)4377{4378 __acquire(&txq->_xmit_lock);4379 return true;4380}4381 4382static inline void __netif_tx_release(struct netdev_queue *txq)4383{4384 __release(&txq->_xmit_lock);4385}4386 4387static inline void __netif_tx_lock_bh(struct netdev_queue *txq)4388{4389 spin_lock_bh(&txq->_xmit_lock);4390 /* Pairs with READ_ONCE() in __dev_queue_xmit() */4391 WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id());4392}4393 4394static inline bool __netif_tx_trylock(struct netdev_queue *txq)4395{4396 bool ok = spin_trylock(&txq->_xmit_lock);4397 4398 if (likely(ok)) {4399 /* Pairs with READ_ONCE() in __dev_queue_xmit() */4400 WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id());4401 }4402 return ok;4403}4404 4405static inline void __netif_tx_unlock(struct netdev_queue *txq)4406{4407 /* Pairs with READ_ONCE() in __dev_queue_xmit() */4408 WRITE_ONCE(txq->xmit_lock_owner, -1);4409 spin_unlock(&txq->_xmit_lock);4410}4411 4412static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)4413{4414 /* Pairs with READ_ONCE() in __dev_queue_xmit() */4415 WRITE_ONCE(txq->xmit_lock_owner, -1);4416 spin_unlock_bh(&txq->_xmit_lock);4417}4418 4419/*4420 * txq->trans_start can be read locklessly from dev_watchdog()4421 */4422static inline void txq_trans_update(struct netdev_queue *txq)4423{4424 if (txq->xmit_lock_owner != -1)4425 WRITE_ONCE(txq->trans_start, jiffies);4426}4427 4428static inline void txq_trans_cond_update(struct netdev_queue *txq)4429{4430 unsigned long now = jiffies;4431 4432 if (READ_ONCE(txq->trans_start) != now)4433 WRITE_ONCE(txq->trans_start, now);4434}4435 4436/* legacy drivers only, netdev_start_xmit() sets txq->trans_start */4437static inline void netif_trans_update(struct net_device *dev)4438{4439 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);4440 4441 txq_trans_cond_update(txq);4442}4443 4444/**4445 * netif_tx_lock - grab network device transmit lock4446 * @dev: network device4447 *4448 * Get network device transmit lock4449 */4450void netif_tx_lock(struct net_device *dev);4451 4452static inline void netif_tx_lock_bh(struct net_device *dev)4453{4454 local_bh_disable();4455 netif_tx_lock(dev);4456}4457 4458void netif_tx_unlock(struct net_device *dev);4459 4460static inline void netif_tx_unlock_bh(struct net_device *dev)4461{4462 netif_tx_unlock(dev);4463 local_bh_enable();4464}4465 4466#define HARD_TX_LOCK(dev, txq, cpu) { \4467 if (!(dev)->lltx) { \4468 __netif_tx_lock(txq, cpu); \4469 } else { \4470 __netif_tx_acquire(txq); \4471 } \4472}4473 4474#define HARD_TX_TRYLOCK(dev, txq) \4475 (!(dev)->lltx ? \4476 __netif_tx_trylock(txq) : \4477 __netif_tx_acquire(txq))4478 4479#define HARD_TX_UNLOCK(dev, txq) { \4480 if (!(dev)->lltx) { \4481 __netif_tx_unlock(txq); \4482 } else { \4483 __netif_tx_release(txq); \4484 } \4485}4486 4487static inline void netif_tx_disable(struct net_device *dev)4488{4489 unsigned int i;4490 int cpu;4491 4492 local_bh_disable();4493 cpu = smp_processor_id();4494 spin_lock(&dev->tx_global_lock);4495 for (i = 0; i < dev->num_tx_queues; i++) {4496 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);4497 4498 __netif_tx_lock(txq, cpu);4499 netif_tx_stop_queue(txq);4500 __netif_tx_unlock(txq);4501 }4502 spin_unlock(&dev->tx_global_lock);4503 local_bh_enable();4504}4505 4506static inline void netif_addr_lock(struct net_device *dev)4507{4508 unsigned char nest_level = 0;4509 4510#ifdef CONFIG_LOCKDEP4511 nest_level = dev->nested_level;4512#endif4513 spin_lock_nested(&dev->addr_list_lock, nest_level);4514}4515 4516static inline void netif_addr_lock_bh(struct net_device *dev)4517{4518 unsigned char nest_level = 0;4519 4520#ifdef CONFIG_LOCKDEP4521 nest_level = dev->nested_level;4522#endif4523 local_bh_disable();4524 spin_lock_nested(&dev->addr_list_lock, nest_level);4525}4526 4527static inline void netif_addr_unlock(struct net_device *dev)4528{4529 spin_unlock(&dev->addr_list_lock);4530}4531 4532static inline void netif_addr_unlock_bh(struct net_device *dev)4533{4534 spin_unlock_bh(&dev->addr_list_lock);4535}4536 4537/*4538 * dev_addrs walker. Should be used only for read access. Call with4539 * rcu_read_lock held.4540 */4541#define for_each_dev_addr(dev, ha) \4542 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)4543 4544/* These functions live elsewhere (drivers/net/net_init.c, but related) */4545 4546void ether_setup(struct net_device *dev);4547 4548/* Allocate dummy net_device */4549struct net_device *alloc_netdev_dummy(int sizeof_priv);4550 4551/* Support for loadable net-drivers */4552struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,4553 unsigned char name_assign_type,4554 void (*setup)(struct net_device *),4555 unsigned int txqs, unsigned int rxqs);4556#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \4557 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)4558 4559#define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \4560 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \4561 count)4562 4563int register_netdev(struct net_device *dev);4564void unregister_netdev(struct net_device *dev);4565 4566int devm_register_netdev(struct device *dev, struct net_device *ndev);4567 4568/* General hardware address lists handling functions */4569int __hw_addr_sync(struct netdev_hw_addr_list *to_list,4570 struct netdev_hw_addr_list *from_list, int addr_len);4571void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,4572 struct netdev_hw_addr_list *from_list, int addr_len);4573int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,4574 struct net_device *dev,4575 int (*sync)(struct net_device *, const unsigned char *),4576 int (*unsync)(struct net_device *,4577 const unsigned char *));4578int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,4579 struct net_device *dev,4580 int (*sync)(struct net_device *,4581 const unsigned char *, int),4582 int (*unsync)(struct net_device *,4583 const unsigned char *, int));4584void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,4585 struct net_device *dev,4586 int (*unsync)(struct net_device *,4587 const unsigned char *, int));4588void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,4589 struct net_device *dev,4590 int (*unsync)(struct net_device *,4591 const unsigned char *));4592void __hw_addr_init(struct netdev_hw_addr_list *list);4593 4594/* Functions used for device addresses handling */4595void dev_addr_mod(struct net_device *dev, unsigned int offset,4596 const void *addr, size_t len);4597 4598static inline void4599__dev_addr_set(struct net_device *dev, const void *addr, size_t len)4600{4601 dev_addr_mod(dev, 0, addr, len);4602}4603 4604static inline void dev_addr_set(struct net_device *dev, const u8 *addr)4605{4606 __dev_addr_set(dev, addr, dev->addr_len);4607}4608 4609int dev_addr_add(struct net_device *dev, const unsigned char *addr,4610 unsigned char addr_type);4611int dev_addr_del(struct net_device *dev, const unsigned char *addr,4612 unsigned char addr_type);4613 4614/* Functions used for unicast addresses handling */4615int dev_uc_add(struct net_device *dev, const unsigned char *addr);4616int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);4617int dev_uc_del(struct net_device *dev, const unsigned char *addr);4618int dev_uc_sync(struct net_device *to, struct net_device *from);4619int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);4620void dev_uc_unsync(struct net_device *to, struct net_device *from);4621void dev_uc_flush(struct net_device *dev);4622void dev_uc_init(struct net_device *dev);4623 4624/**4625 * __dev_uc_sync - Synchronize device's unicast list4626 * @dev: device to sync4627 * @sync: function to call if address should be added4628 * @unsync: function to call if address should be removed4629 *4630 * Add newly added addresses to the interface, and release4631 * addresses that have been deleted.4632 */4633static inline int __dev_uc_sync(struct net_device *dev,4634 int (*sync)(struct net_device *,4635 const unsigned char *),4636 int (*unsync)(struct net_device *,4637 const unsigned char *))4638{4639 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);4640}4641 4642/**4643 * __dev_uc_unsync - Remove synchronized addresses from device4644 * @dev: device to sync4645 * @unsync: function to call if address should be removed4646 *4647 * Remove all addresses that were added to the device by dev_uc_sync().4648 */4649static inline void __dev_uc_unsync(struct net_device *dev,4650 int (*unsync)(struct net_device *,4651 const unsigned char *))4652{4653 __hw_addr_unsync_dev(&dev->uc, dev, unsync);4654}4655 4656/* Functions used for multicast addresses handling */4657int dev_mc_add(struct net_device *dev, const unsigned char *addr);4658int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);4659int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);4660int dev_mc_del(struct net_device *dev, const unsigned char *addr);4661int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);4662int dev_mc_sync(struct net_device *to, struct net_device *from);4663int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);4664void dev_mc_unsync(struct net_device *to, struct net_device *from);4665void dev_mc_flush(struct net_device *dev);4666void dev_mc_init(struct net_device *dev);4667 4668/**4669 * __dev_mc_sync - Synchronize device's multicast list4670 * @dev: device to sync4671 * @sync: function to call if address should be added4672 * @unsync: function to call if address should be removed4673 *4674 * Add newly added addresses to the interface, and release4675 * addresses that have been deleted.4676 */4677static inline int __dev_mc_sync(struct net_device *dev,4678 int (*sync)(struct net_device *,4679 const unsigned char *),4680 int (*unsync)(struct net_device *,4681 const unsigned char *))4682{4683 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);4684}4685 4686/**4687 * __dev_mc_unsync - Remove synchronized addresses from device4688 * @dev: device to sync4689 * @unsync: function to call if address should be removed4690 *4691 * Remove all addresses that were added to the device by dev_mc_sync().4692 */4693static inline void __dev_mc_unsync(struct net_device *dev,4694 int (*unsync)(struct net_device *,4695 const unsigned char *))4696{4697 __hw_addr_unsync_dev(&dev->mc, dev, unsync);4698}4699 4700/* Functions used for secondary unicast and multicast support */4701void dev_set_rx_mode(struct net_device *dev);4702int dev_set_promiscuity(struct net_device *dev, int inc);4703int dev_set_allmulti(struct net_device *dev, int inc);4704void netdev_state_change(struct net_device *dev);4705void __netdev_notify_peers(struct net_device *dev);4706void netdev_notify_peers(struct net_device *dev);4707void netdev_features_change(struct net_device *dev);4708/* Load a device via the kmod */4709void dev_load(struct net *net, const char *name);4710struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,4711 struct rtnl_link_stats64 *storage);4712void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,4713 const struct net_device_stats *netdev_stats);4714void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,4715 const struct pcpu_sw_netstats __percpu *netstats);4716void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s);4717 4718enum {4719 NESTED_SYNC_IMM_BIT,4720 NESTED_SYNC_TODO_BIT,4721};4722 4723#define __NESTED_SYNC_BIT(bit) ((u32)1 << (bit))4724#define __NESTED_SYNC(name) __NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT)4725 4726#define NESTED_SYNC_IMM __NESTED_SYNC(IMM)4727#define NESTED_SYNC_TODO __NESTED_SYNC(TODO)4728 4729struct netdev_nested_priv {4730 unsigned char flags;4731 void *data;4732};4733 4734bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);4735struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,4736 struct list_head **iter);4737 4738/* iterate through upper list, must be called under RCU read lock */4739#define netdev_for_each_upper_dev_rcu(dev, updev, iter) \4740 for (iter = &(dev)->adj_list.upper, \4741 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \4742 updev; \4743 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))4744 4745int netdev_walk_all_upper_dev_rcu(struct net_device *dev,4746 int (*fn)(struct net_device *upper_dev,4747 struct netdev_nested_priv *priv),4748 struct netdev_nested_priv *priv);4749 4750bool netdev_has_upper_dev_all_rcu(struct net_device *dev,4751 struct net_device *upper_dev);4752 4753bool netdev_has_any_upper_dev(struct net_device *dev);4754 4755void *netdev_lower_get_next_private(struct net_device *dev,4756 struct list_head **iter);4757void *netdev_lower_get_next_private_rcu(struct net_device *dev,4758 struct list_head **iter);4759 4760#define netdev_for_each_lower_private(dev, priv, iter) \4761 for (iter = (dev)->adj_list.lower.next, \4762 priv = netdev_lower_get_next_private(dev, &(iter)); \4763 priv; \4764 priv = netdev_lower_get_next_private(dev, &(iter)))4765 4766#define netdev_for_each_lower_private_rcu(dev, priv, iter) \4767 for (iter = &(dev)->adj_list.lower, \4768 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \4769 priv; \4770 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))4771 4772void *netdev_lower_get_next(struct net_device *dev,4773 struct list_head **iter);4774 4775#define netdev_for_each_lower_dev(dev, ldev, iter) \4776 for (iter = (dev)->adj_list.lower.next, \4777 ldev = netdev_lower_get_next(dev, &(iter)); \4778 ldev; \4779 ldev = netdev_lower_get_next(dev, &(iter)))4780 4781struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,4782 struct list_head **iter);4783int netdev_walk_all_lower_dev(struct net_device *dev,4784 int (*fn)(struct net_device *lower_dev,4785 struct netdev_nested_priv *priv),4786 struct netdev_nested_priv *priv);4787int netdev_walk_all_lower_dev_rcu(struct net_device *dev,4788 int (*fn)(struct net_device *lower_dev,4789 struct netdev_nested_priv *priv),4790 struct netdev_nested_priv *priv);4791 4792void *netdev_adjacent_get_private(struct list_head *adj_list);4793void *netdev_lower_get_first_private_rcu(struct net_device *dev);4794struct net_device *netdev_master_upper_dev_get(struct net_device *dev);4795struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);4796int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,4797 struct netlink_ext_ack *extack);4798int netdev_master_upper_dev_link(struct net_device *dev,4799 struct net_device *upper_dev,4800 void *upper_priv, void *upper_info,4801 struct netlink_ext_ack *extack);4802void netdev_upper_dev_unlink(struct net_device *dev,4803 struct net_device *upper_dev);4804int netdev_adjacent_change_prepare(struct net_device *old_dev,4805 struct net_device *new_dev,4806 struct net_device *dev,4807 struct netlink_ext_ack *extack);4808void netdev_adjacent_change_commit(struct net_device *old_dev,4809 struct net_device *new_dev,4810 struct net_device *dev);4811void netdev_adjacent_change_abort(struct net_device *old_dev,4812 struct net_device *new_dev,4813 struct net_device *dev);4814void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);4815void *netdev_lower_dev_get_private(struct net_device *dev,4816 struct net_device *lower_dev);4817void netdev_lower_state_changed(struct net_device *lower_dev,4818 void *lower_state_info);4819 4820/* RSS keys are 40 or 52 bytes long */4821#define NETDEV_RSS_KEY_LEN 524822extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;4823void netdev_rss_key_fill(void *buffer, size_t len);4824 4825int skb_checksum_help(struct sk_buff *skb);4826int skb_crc32c_csum_help(struct sk_buff *skb);4827int skb_csum_hwoffload_help(struct sk_buff *skb,4828 const netdev_features_t features);4829 4830struct netdev_bonding_info {4831 ifslave slave;4832 ifbond master;4833};4834 4835struct netdev_notifier_bonding_info {4836 struct netdev_notifier_info info; /* must be first */4837 struct netdev_bonding_info bonding_info;4838};4839 4840void netdev_bonding_info_change(struct net_device *dev,4841 struct netdev_bonding_info *bonding_info);4842 4843#if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)4844void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);4845#else4846static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,4847 const void *data)4848{4849}4850#endif4851 4852__be16 skb_network_protocol(struct sk_buff *skb, int *depth);4853 4854static inline bool can_checksum_protocol(netdev_features_t features,4855 __be16 protocol)4856{4857 if (protocol == htons(ETH_P_FCOE))4858 return !!(features & NETIF_F_FCOE_CRC);4859 4860 /* Assume this is an IP checksum (not SCTP CRC) */4861 4862 if (features & NETIF_F_HW_CSUM) {4863 /* Can checksum everything */4864 return true;4865 }4866 4867 switch (protocol) {4868 case htons(ETH_P_IP):4869 return !!(features & NETIF_F_IP_CSUM);4870 case htons(ETH_P_IPV6):4871 return !!(features & NETIF_F_IPV6_CSUM);4872 default:4873 return false;4874 }4875}4876 4877#ifdef CONFIG_BUG4878void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);4879#else4880static inline void netdev_rx_csum_fault(struct net_device *dev,4881 struct sk_buff *skb)4882{4883}4884#endif4885/* rx skb timestamps */4886void net_enable_timestamp(void);4887void net_disable_timestamp(void);4888 4889static inline ktime_t netdev_get_tstamp(struct net_device *dev,4890 const struct skb_shared_hwtstamps *hwtstamps,4891 bool cycles)4892{4893 const struct net_device_ops *ops = dev->netdev_ops;4894 4895 if (ops->ndo_get_tstamp)4896 return ops->ndo_get_tstamp(dev, hwtstamps, cycles);4897 4898 return hwtstamps->hwtstamp;4899}4900 4901#ifndef CONFIG_PREEMPT_RT4902static inline void netdev_xmit_set_more(bool more)4903{4904 __this_cpu_write(softnet_data.xmit.more, more);4905}4906 4907static inline bool netdev_xmit_more(void)4908{4909 return __this_cpu_read(softnet_data.xmit.more);4910}4911#else4912static inline void netdev_xmit_set_more(bool more)4913{4914 current->net_xmit.more = more;4915}4916 4917static inline bool netdev_xmit_more(void)4918{4919 return current->net_xmit.more;4920}4921#endif4922 4923static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,4924 struct sk_buff *skb, struct net_device *dev,4925 bool more)4926{4927 netdev_xmit_set_more(more);4928 return ops->ndo_start_xmit(skb, dev);4929}4930 4931static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,4932 struct netdev_queue *txq, bool more)4933{4934 const struct net_device_ops *ops = dev->netdev_ops;4935 netdev_tx_t rc;4936 4937 rc = __netdev_start_xmit(ops, skb, dev, more);4938 if (rc == NETDEV_TX_OK)4939 txq_trans_update(txq);4940 4941 return rc;4942}4943 4944int netdev_class_create_file_ns(const struct class_attribute *class_attr,4945 const void *ns);4946void netdev_class_remove_file_ns(const struct class_attribute *class_attr,4947 const void *ns);4948 4949extern const struct kobj_ns_type_operations net_ns_type_operations;4950 4951const char *netdev_drivername(const struct net_device *dev);4952 4953static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,4954 netdev_features_t f2)4955{4956 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {4957 if (f1 & NETIF_F_HW_CSUM)4958 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);4959 else4960 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);4961 }4962 4963 return f1 & f2;4964}4965 4966static inline netdev_features_t netdev_get_wanted_features(4967 struct net_device *dev)4968{4969 return (dev->features & ~dev->hw_features) | dev->wanted_features;4970}4971netdev_features_t netdev_increment_features(netdev_features_t all,4972 netdev_features_t one, netdev_features_t mask);4973 4974/* Allow TSO being used on stacked device :4975 * Performing the GSO segmentation before last device4976 * is a performance improvement.4977 */4978static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,4979 netdev_features_t mask)4980{4981 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);4982}4983 4984int __netdev_update_features(struct net_device *dev);4985void netdev_update_features(struct net_device *dev);4986void netdev_change_features(struct net_device *dev);4987 4988void netif_stacked_transfer_operstate(const struct net_device *rootdev,4989 struct net_device *dev);4990 4991netdev_features_t passthru_features_check(struct sk_buff *skb,4992 struct net_device *dev,4993 netdev_features_t features);4994netdev_features_t netif_skb_features(struct sk_buff *skb);4995void skb_warn_bad_offload(const struct sk_buff *skb);4996 4997static inline bool net_gso_ok(netdev_features_t features, int gso_type)4998{4999 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;5000 5001 /* check flags correspondence */5002 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));5003 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));5004 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));5005 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));5006 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));5007 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));5008 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));5009 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));5010 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));5011 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));5012 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));5013 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));5014 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));5015 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));5016 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));5017 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));5018 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));5019 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));5020 BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));5021 5022 return (features & feature) == feature;5023}5024 5025static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)5026{5027 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&5028 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));5029}5030 5031static inline bool netif_needs_gso(struct sk_buff *skb,5032 netdev_features_t features)5033{5034 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||5035 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&5036 (skb->ip_summed != CHECKSUM_UNNECESSARY)));5037}5038 5039void netif_set_tso_max_size(struct net_device *dev, unsigned int size);5040void netif_set_tso_max_segs(struct net_device *dev, unsigned int segs);5041void netif_inherit_tso_max(struct net_device *to,5042 const struct net_device *from);5043 5044static inline unsigned int5045netif_get_gro_max_size(const struct net_device *dev, const struct sk_buff *skb)5046{5047 /* pairs with WRITE_ONCE() in netif_set_gro(_ipv4)_max_size() */5048 return skb->protocol == htons(ETH_P_IPV6) ?5049 READ_ONCE(dev->gro_max_size) :5050 READ_ONCE(dev->gro_ipv4_max_size);5051}5052 5053static inline unsigned int5054netif_get_gso_max_size(const struct net_device *dev, const struct sk_buff *skb)5055{5056 /* pairs with WRITE_ONCE() in netif_set_gso(_ipv4)_max_size() */5057 return skb->protocol == htons(ETH_P_IPV6) ?5058 READ_ONCE(dev->gso_max_size) :5059 READ_ONCE(dev->gso_ipv4_max_size);5060}5061 5062static inline bool netif_is_macsec(const struct net_device *dev)5063{5064 return dev->priv_flags & IFF_MACSEC;5065}5066 5067static inline bool netif_is_macvlan(const struct net_device *dev)5068{5069 return dev->priv_flags & IFF_MACVLAN;5070}5071 5072static inline bool netif_is_macvlan_port(const struct net_device *dev)5073{5074 return dev->priv_flags & IFF_MACVLAN_PORT;5075}5076 5077static inline bool netif_is_bond_master(const struct net_device *dev)5078{5079 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;5080}5081 5082static inline bool netif_is_bond_slave(const struct net_device *dev)5083{5084 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;5085}5086 5087static inline bool netif_supports_nofcs(struct net_device *dev)5088{5089 return dev->priv_flags & IFF_SUPP_NOFCS;5090}5091 5092static inline bool netif_has_l3_rx_handler(const struct net_device *dev)5093{5094 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;5095}5096 5097static inline bool netif_is_l3_master(const struct net_device *dev)5098{5099 return dev->priv_flags & IFF_L3MDEV_MASTER;5100}5101 5102static inline bool netif_is_l3_slave(const struct net_device *dev)5103{5104 return dev->priv_flags & IFF_L3MDEV_SLAVE;5105}5106 5107static inline int dev_sdif(const struct net_device *dev)5108{5109#ifdef CONFIG_NET_L3_MASTER_DEV5110 if (netif_is_l3_slave(dev))5111 return dev->ifindex;5112#endif5113 return 0;5114}5115 5116static inline bool netif_is_bridge_master(const struct net_device *dev)5117{5118 return dev->priv_flags & IFF_EBRIDGE;5119}5120 5121static inline bool netif_is_bridge_port(const struct net_device *dev)5122{5123 return dev->priv_flags & IFF_BRIDGE_PORT;5124}5125 5126static inline bool netif_is_ovs_master(const struct net_device *dev)5127{5128 return dev->priv_flags & IFF_OPENVSWITCH;5129}5130 5131static inline bool netif_is_ovs_port(const struct net_device *dev)5132{5133 return dev->priv_flags & IFF_OVS_DATAPATH;5134}5135 5136static inline bool netif_is_any_bridge_master(const struct net_device *dev)5137{5138 return netif_is_bridge_master(dev) || netif_is_ovs_master(dev);5139}5140 5141static inline bool netif_is_any_bridge_port(const struct net_device *dev)5142{5143 return netif_is_bridge_port(dev) || netif_is_ovs_port(dev);5144}5145 5146static inline bool netif_is_team_master(const struct net_device *dev)5147{5148 return dev->priv_flags & IFF_TEAM;5149}5150 5151static inline bool netif_is_team_port(const struct net_device *dev)5152{5153 return dev->priv_flags & IFF_TEAM_PORT;5154}5155 5156static inline bool netif_is_lag_master(const struct net_device *dev)5157{5158 return netif_is_bond_master(dev) || netif_is_team_master(dev);5159}5160 5161static inline bool netif_is_lag_port(const struct net_device *dev)5162{5163 return netif_is_bond_slave(dev) || netif_is_team_port(dev);5164}5165 5166static inline bool netif_is_rxfh_configured(const struct net_device *dev)5167{5168 return dev->priv_flags & IFF_RXFH_CONFIGURED;5169}5170 5171static inline bool netif_is_failover(const struct net_device *dev)5172{5173 return dev->priv_flags & IFF_FAILOVER;5174}5175 5176static inline bool netif_is_failover_slave(const struct net_device *dev)5177{5178 return dev->priv_flags & IFF_FAILOVER_SLAVE;5179}5180 5181/* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */5182static inline void netif_keep_dst(struct net_device *dev)5183{5184 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);5185}5186 5187/* return true if dev can't cope with mtu frames that need vlan tag insertion */5188static inline bool netif_reduces_vlan_mtu(struct net_device *dev)5189{5190 /* TODO: reserve and use an additional IFF bit, if we get more users */5191 return netif_is_macsec(dev);5192}5193 5194extern struct pernet_operations __net_initdata loopback_net_ops;5195 5196/* Logging, debugging and troubleshooting/diagnostic helpers. */5197 5198/* netdev_printk helpers, similar to dev_printk */5199 5200static inline const char *netdev_name(const struct net_device *dev)5201{5202 if (!dev->name[0] || strchr(dev->name, '%'))5203 return "(unnamed net_device)";5204 return dev->name;5205}5206 5207static inline const char *netdev_reg_state(const struct net_device *dev)5208{5209 u8 reg_state = READ_ONCE(dev->reg_state);5210 5211 switch (reg_state) {5212 case NETREG_UNINITIALIZED: return " (uninitialized)";5213 case NETREG_REGISTERED: return "";5214 case NETREG_UNREGISTERING: return " (unregistering)";5215 case NETREG_UNREGISTERED: return " (unregistered)";5216 case NETREG_RELEASED: return " (released)";5217 case NETREG_DUMMY: return " (dummy)";5218 }5219 5220 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, reg_state);5221 return " (unknown)";5222}5223 5224#define MODULE_ALIAS_NETDEV(device) \5225 MODULE_ALIAS("netdev-" device)5226 5227/*5228 * netdev_WARN() acts like dev_printk(), but with the key difference5229 * of using a WARN/WARN_ON to get the message out, including the5230 * file/line information and a backtrace.5231 */5232#define netdev_WARN(dev, format, args...) \5233 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \5234 netdev_reg_state(dev), ##args)5235 5236#define netdev_WARN_ONCE(dev, format, args...) \5237 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \5238 netdev_reg_state(dev), ##args)5239 5240/*5241 * The list of packet types we will receive (as opposed to discard)5242 * and the routines to invoke.5243 *5244 * Why 16. Because with 16 the only overlap we get on a hash of the5245 * low nibble of the protocol value is RARP/SNAP/X.25.5246 *5247 * 0800 IP5248 * 0001 802.35249 * 0002 AX.255250 * 0004 802.25251 * 8035 RARP5252 * 0005 SNAP5253 * 0805 X.255254 * 0806 ARP5255 * 8137 IPX5256 * 0009 Localtalk5257 * 86DD IPv65258 */5259#define PTYPE_HASH_SIZE (16)5260#define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)5261 5262extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;5263 5264extern struct net_device *blackhole_netdev;5265 5266/* Note: Avoid these macros in fast path, prefer per-cpu or per-queue counters. */5267#define DEV_STATS_INC(DEV, FIELD) atomic_long_inc(&(DEV)->stats.__##FIELD)5268#define DEV_STATS_ADD(DEV, FIELD, VAL) \5269 atomic_long_add((VAL), &(DEV)->stats.__##FIELD)5270#define DEV_STATS_READ(DEV, FIELD) atomic_long_read(&(DEV)->stats.__##FIELD)5271 5272#endif /* _LINUX_NETDEVICE_H */5273