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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
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SPDX-License-Identifier: GPL-2.0-or-later *//* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for the Interfaces handler. * * Version: @(#)dev.h 1.0.10 08/12/93 * * Authors: Ross Biro * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * Corey Minyard <wf-rch!minyard@relay.EU.net> * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> * Alan Cox, <alan@lxorguk.ukuu.org.uk> * Bjorn Ekwall. <bj0rn@blox.se> * Pekka Riikonen <priikone@poseidon.pspt.fi> * * Moved to /usr/include/linux for NET3 */#ifndef _LINUX_NETDEVICE_H#define _LINUX_NETDEVICE_H
#include <linux/timer.h>#include <linux/bug.h>#include <linux/delay.h>#include <linux/atomic.h>#include <linux/prefetch.h>#include <asm/cache.h>#include <asm/byteorder.h>#include <asm/local.h>
#include <linux/percpu.h>#include <linux/rculist.h>#include <linux/workqueue.h>#include <linux/dynamic_queue_limits.h>
#include <net/net_namespace.h>#ifdef CONFIG_DCB#include <net/dcbnl.h>#endif#include <net/netprio_cgroup.h>#include <linux/netdev_features.h>#include <linux/neighbour.h>#include <linux/netdevice_xmit.h>#include <uapi/linux/netdevice.h>#include <uapi/linux/if_bonding.h>#include <uapi/linux/pkt_cls.h>#include <uapi/linux/netdev.h>#include <linux/hashtable.h>#include <linux/rbtree.h>#include <net/net_trackers.h>#include <net/net_debug.h>#include <net/dropreason-core.h>#include <net/neighbour_tables.h>
struct netpoll_info;struct device;struct ethtool_ops;struct kernel_hwtstamp_config;struct phy_device;struct dsa_port;struct ip_tunnel_parm_kern;struct macsec_context;struct macsec_ops;struct netdev_config;struct netdev_name_node;struct sd_flow_limit;struct sfp_bus;/* 802.11 specific */struct wireless_dev;/* 802.15.4 specific */struct wpan_dev;struct mpls_dev;/* UDP Tunnel offloads */struct udp_tunnel_info;struct udp_tunnel_nic_info;struct udp_tunnel_nic;struct bpf_prog;struct xdp_buff;struct xdp_frame;struct xdp_metadata_ops;struct xdp_md;struct ethtool_netdev_state;struct phy_link_topology;struct hwtstamp_provider;
typedef u32 xdp_features_t;
void synchronize_net(void);void netdev_set_default_ethtool_ops(struct net_device *dev, const struct ethtool_ops *ops);void netdev_sw_irq_coalesce_default_on(struct net_device *dev);
/* Backlog congestion levels */#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */#define NET_RX_DROP 1 /* packet dropped */
#define MAX_NEST_DEV 8
/* * Transmit return codes: transmit return codes originate from three different * namespaces: * * - qdisc return codes * - driver transmit return codes * - errno values * * Drivers are allowed to return any one of those in their hard_start_xmit() * function. Real network devices commonly used with qdiscs should only return * the driver transmit return codes though - when qdiscs are used, the actual * transmission happens asynchronously, so the value is not propagated to * higher layers. Virtual network devices transmit synchronously; in this case * the driver transmit return codes are consumed by dev_queue_xmit(), and all * others are propagated to higher layers. */
/* qdisc ->enqueue() return codes. */#define NET_XMIT_SUCCESS 0x00#define NET_XMIT_DROP 0x01 /* skb dropped */#define NET_XMIT_CN 0x02 /* congestion notification */#define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It * indicates that the device will soon be dropping packets, or already drops * some packets of the same priority; prompting us to send less aggressively. */#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
/* Driver transmit return codes */#define NETDEV_TX_MASK 0xf0
enum netdev_tx { __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ NETDEV_TX_OK = 0x00, /* driver took care of packet */ NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/};typedef enum netdev_tx netdev_tx_t;
/* * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. */static inline bool dev_xmit_complete(int rc){ /* * Positive cases with an skb consumed by a driver: * - successful transmission (rc == NETDEV_TX_OK) * - error while transmitting (rc < 0) * - error while queueing to a different device (rc & NET_XMIT_MASK) */ if (likely(rc < NET_XMIT_MASK)) return true;
return false;}
/* * Compute the worst-case header length according to the protocols * used. */
#if defined(CONFIG_HYPERV_NET)# define LL_MAX_HEADER 128#elif defined(CONFIG_WLAN)# if defined(CONFIG_MAC80211_MESH)# define LL_MAX_HEADER 128# else# define LL_MAX_HEADER 96# endif#else# define LL_MAX_HEADER 32#endif
#if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)#define MAX_HEADER LL_MAX_HEADER#else#define MAX_HEADER (LL_MAX_HEADER + 48)#endif
/* * Old network device statistics. Fields are native words * (unsigned long) so they can be read and written atomically. */
#define NET_DEV_STAT(FIELD) \ union { \ unsigned long FIELD; \ atomic_long_t __##FIELD; \ }
struct net_device_stats { NET_DEV_STAT(rx_packets); NET_DEV_STAT(tx_packets); NET_DEV_STAT(rx_bytes); NET_DEV_STAT(tx_bytes); NET_DEV_STAT(rx_errors); NET_DEV_STAT(tx_errors); NET_DEV_STAT(rx_dropped); NET_DEV_STAT(tx_dropped); NET_DEV_STAT(multicast); NET_DEV_STAT(collisions); NET_DEV_STAT(rx_length_errors); NET_DEV_STAT(rx_over_errors); NET_DEV_STAT(rx_crc_errors); NET_DEV_STAT(rx_frame_errors); NET_DEV_STAT(rx_fifo_errors); NET_DEV_STAT(rx_missed_errors); NET_DEV_STAT(tx_aborted_errors); NET_DEV_STAT(tx_carrier_errors); NET_DEV_STAT(tx_fifo_errors); NET_DEV_STAT(tx_heartbeat_errors); NET_DEV_STAT(tx_window_errors); NET_DEV_STAT(rx_compressed); NET_DEV_STAT(tx_compressed);};#undef NET_DEV_STAT
/* per-cpu stats, allocated on demand. * Try to fit them in a single cache line, for dev_get_stats() sake. */struct net_device_core_stats { unsigned long rx_dropped; unsigned long tx_dropped; unsigned long rx_nohandler; unsigned long rx_otherhost_dropped;} __aligned(4 * sizeof(unsigned long));
#include <linux/cache.h>#include <linux/skbuff.h>
struct neighbour;struct neigh_parms;struct sk_buff;
struct netdev_hw_addr { struct list_head list; struct rb_node node; unsigned char addr[MAX_ADDR_LEN]; unsigned char type;#define NETDEV_HW_ADDR_T_LAN 1#define NETDEV_HW_ADDR_T_SAN 2#define NETDEV_HW_ADDR_T_UNICAST 3#define NETDEV_HW_ADDR_T_MULTICAST 4 bool global_use; int sync_cnt; int refcount; int synced; struct rcu_head rcu_head;};
struct netdev_hw_addr_list { struct list_head list; int count;
/* Auxiliary tree for faster lookup on addition and deletion */ struct rb_root tree;};
#define netdev_hw_addr_list_count(l) ((l)->count)#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)#define netdev_hw_addr_list_for_each(ha, l) \ list_for_each_entry(ha, &(l)->list, list)
#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)#define netdev_for_each_uc_addr(ha, dev) \ netdev_hw_addr_list_for_each(ha, &(dev)->uc)#define netdev_for_each_synced_uc_addr(_ha, _dev) \ netdev_for_each_uc_addr((_ha), (_dev)) \ if ((_ha)->sync_cnt)
#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)#define netdev_for_each_mc_addr(ha, dev) \ netdev_hw_addr_list_for_each(ha, &(dev)->mc)#define netdev_for_each_synced_mc_addr(_ha, _dev) \ netdev_for_each_mc_addr((_ha), (_dev)) \ if ((_ha)->sync_cnt)
struct hh_cache { unsigned int hh_len; seqlock_t hh_lock;
/* cached hardware header; allow for machine alignment needs. */#define HH_DATA_MOD 16#define HH_DATA_OFF(__len) \ (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))#define HH_DATA_ALIGN(__len) \ (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];};
/* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. * Alternative is: * dev->hard_header_len ? (dev->hard_header_len + * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 * * We could use other alignment values, but we must maintain the * relationship HH alignment <= LL alignment. */#define LL_RESERVED_SPACE_EX(dev, hlen) \ ((((hlen) + READ_ONCE((dev)->needed_headroom)) \ & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)#define LL_RESERVED_SPACE(dev) \ LL_RESERVED_SPACE_EX(dev, (dev)->hard_header_len)#define LL_RESERVED_SPACE_EXTRA(dev,extra) \ ((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom) + (extra)) \ & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
struct header_ops { int (*create) (struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned int len); int (*parse)(const struct sk_buff *skb, const struct net_device *dev, unsigned char *haddr); int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); void (*cache_update)(struct hh_cache *hh, const struct net_device *dev, const unsigned char *haddr); bool (*validate)(const char *ll_header, unsigned int len); __be16 (*parse_protocol)(const struct sk_buff *skb);};
/* These flag bits are private to the generic network queueing * layer; they may not be explicitly referenced by any other * code. */
enum netdev_state_t { __LINK_STATE_START, __LINK_STATE_PRESENT, __LINK_STATE_NOCARRIER, __LINK_STATE_LINKWATCH_PENDING, __LINK_STATE_DORMANT, __LINK_STATE_TESTING,};
struct gro_list { struct list_head list; int count;};
/* * size of gro hash buckets, must be <= the number of bits in * gro_node::bitmask */#define GRO_HASH_BUCKETS 8
/** * struct gro_node - structure to support Generic Receive Offload * @bitmask: bitmask to indicate used buckets in @hash * @hash: hashtable of pending aggregated skbs, separated by flows * @rx_list: list of pending ``GRO_NORMAL`` skbs * @rx_count: cached current length of @rx_list * @cached_napi_id: napi_struct::napi_id cached for hotpath, 0 for standalone */struct gro_node { unsigned long bitmask; struct gro_list hash[GRO_HASH_BUCKETS]; struct list_head rx_list; u32 rx_count; u32 cached_napi_id;};
/* * Structure for per-NAPI config */struct napi_config { u64 gro_flush_timeout; u64 irq_suspend_timeout; u32 defer_hard_irqs; cpumask_t affinity_mask; u8 threaded; unsigned int napi_id;};
/* * Structure for NAPI scheduling similar to tasklet but with weighting */struct napi_struct { /* This field should be first or softnet_data.backlog needs tweaks. */ unsigned long state; /* The poll_list must only be managed by the entity which * changes the state of the NAPI_STATE_SCHED bit. This means * whoever atomically sets that bit can add this napi_struct * to the per-CPU poll_list, and whoever clears that bit * can remove from the list right before clearing the bit. */ struct list_head poll_list;
int weight; u32 defer_hard_irqs_count; int (*poll)(struct napi_struct *, int);#ifdef CONFIG_NETPOLL /* CPU actively polling if netpoll is configured */ int poll_owner;#endif /* CPU on which NAPI has been scheduled for processing */ int list_owner; struct net_device *dev; struct sk_buff *skb; struct gro_node gro; struct hrtimer timer; /* all fields past this point are write-protected by netdev_lock */ struct task_struct *thread; unsigned long gro_flush_timeout; unsigned long irq_suspend_timeout; u32 defer_hard_irqs; /* control-path-only fields follow */ u32 napi_id; struct list_head dev_list; struct hlist_node napi_hash_node; int irq; struct irq_affinity_notify notify; int napi_rmap_idx; int index; struct napi_config *config;};
enum { NAPI_STATE_SCHED, /* Poll is scheduled */ NAPI_STATE_MISSED, /* reschedule a napi */ NAPI_STATE_DISABLE, /* Disable pending */ NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ NAPI_STATE_LISTED, /* NAPI added to system lists */ NAPI_STATE_NO_BUSY_POLL, /* Do not add in napi_hash, no busy polling */ NAPI_STATE_IN_BUSY_POLL, /* Do not rearm NAPI interrupt */ NAPI_STATE_PREFER_BUSY_POLL, /* prefer busy-polling over softirq processing*/ NAPI_STATE_THREADED, /* The poll is performed inside its own thread*/ NAPI_STATE_SCHED_THREADED, /* Napi is currently scheduled in threaded mode */ NAPI_STATE_HAS_NOTIFIER, /* Napi has an IRQ notifier */ NAPI_STATE_THREADED_BUSY_POLL, /* The threaded NAPI poller will busy poll */};
enum { NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED), NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED), NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE), NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC), NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED), NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL), NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL), NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL), NAPIF_STATE_THREADED = BIT(NAPI_STATE_THREADED), NAPIF_STATE_SCHED_THREADED = BIT(NAPI_STATE_SCHED_THREADED), NAPIF_STATE_HAS_NOTIFIER = BIT(NAPI_STATE_HAS_NOTIFIER), NAPIF_STATE_THREADED_BUSY_POLL = BIT(NAPI_STATE_THREADED_BUSY_POLL),};
enum gro_result { GRO_MERGED, GRO_MERGED_FREE, GRO_HELD, GRO_NORMAL, GRO_CONSUMED,};typedef enum gro_result gro_result_t;
/* * enum rx_handler_result - Possible return values for rx_handlers. * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it * further. * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in * case skb->dev was changed by rx_handler. * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. * * rx_handlers are functions called from inside __netif_receive_skb(), to do * special processing of the skb, prior to delivery to protocol handlers. * * Currently, a net_device can only have a single rx_handler registered. Trying * to register a second rx_handler will return -EBUSY. * * To register a rx_handler on a net_device, use netdev_rx_handler_register(). * To unregister a rx_handler on a net_device, use * netdev_rx_handler_unregister(). * * Upon return, rx_handler is expected to tell __netif_receive_skb() what to * do with the skb. * * If the rx_handler consumed the skb in some way, it should return * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for * the skb to be delivered in some other way. * * If the rx_handler changed skb->dev, to divert the skb to another * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the * new device will be called if it exists. * * If the rx_handler decides the skb should be ignored, it should return * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that * are registered on exact device (ptype->dev == skb->dev). * * If the rx_handler didn't change skb->dev, but wants the skb to be normally * delivered, it should return RX_HANDLER_PASS. * * A device without a registered rx_handler will behave as if rx_handler * returned RX_HANDLER_PASS. */
enum rx_handler_result { RX_HANDLER_CONSUMED, RX_HANDLER_ANOTHER, RX_HANDLER_EXACT, RX_HANDLER_PASS,};typedef enum rx_handler_result rx_handler_result_t;typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
void __napi_schedule(struct napi_struct *n);void __napi_schedule_irqoff(struct napi_struct *n);
static inline bool napi_disable_pending(struct napi_struct *n){ return test_bit(NAPI_STATE_DISABLE, &n->state);}
static inline bool napi_prefer_busy_poll(struct napi_struct *n){ return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state);}
/** * napi_is_scheduled - test if NAPI is scheduled * @n: NAPI context * * This check is "best-effort". With no locking implemented, * a NAPI can be scheduled or terminate right after this check * and produce not precise results. * * NAPI_STATE_SCHED is an internal state, napi_is_scheduled * should not be used normally and napi_schedule should be * used instead. * * Use only if the driver really needs to check if a NAPI * is scheduled for example in the context of delayed timer * that can be skipped if a NAPI is already scheduled. * * Return: True if NAPI is scheduled, False otherwise. */static inline bool napi_is_scheduled(struct napi_struct *n){ return test_bit(NAPI_STATE_SCHED, &n->state);}
bool napi_schedule_prep(struct napi_struct *n);
/** * napi_schedule - schedule NAPI poll * @n: NAPI context * * Schedule NAPI poll routine to be called if it is not already * running. * Return: true if we schedule a NAPI or false if not. * Refer to napi_schedule_prep() for additional reason on why * a NAPI might not be scheduled. */static inline bool napi_schedule(struct napi_struct *n){ if (napi_schedule_prep(n)) { __napi_schedule(n); return true; }
return false;}
/** * napi_schedule_irqoff - schedule NAPI poll * @n: NAPI context * * Variant of napi_schedule(), assuming hard irqs are masked. */static inline void napi_schedule_irqoff(struct napi_struct *n){ if (napi_schedule_prep(n)) __napi_schedule_irqoff(n);}
/** * napi_complete_done - NAPI processing complete * @n: NAPI context * @work_done: number of packets processed * * Mark NAPI processing as complete. Should only be called if poll budget * has not been completely consumed. * Prefer over napi_complete(). * Return: false if device should avoid rearming interrupts. */bool napi_complete_done(struct napi_struct *n, int work_done);
static inline bool napi_complete(struct napi_struct *n){ return napi_complete_done(n, 0);}
void netif_threaded_enable(struct net_device *dev);int dev_set_threaded(struct net_device *dev, enum netdev_napi_threaded threaded);
void napi_disable(struct napi_struct *n);void napi_disable_locked(struct napi_struct *n);
void napi_enable(struct napi_struct *n);void napi_enable_locked(struct napi_struct *n);
/** * napi_synchronize - wait until NAPI is not running * @n: NAPI context * * Wait until NAPI is done being scheduled on this context. * Waits till any outstanding processing completes but * does not disable future activations. */static inline void napi_synchronize(const struct napi_struct *n){ if (IS_ENABLED(CONFIG_SMP)) while (test_bit(NAPI_STATE_SCHED, &n->state)) msleep(1); else barrier();}
/** * napi_if_scheduled_mark_missed - if napi is running, set the * NAPIF_STATE_MISSED * @n: NAPI context * * If napi is running, set the NAPIF_STATE_MISSED, and return true if * NAPI is scheduled. **/static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n){ unsigned long val, new;
val = READ_ONCE(n->state); do { if (val & NAPIF_STATE_DISABLE) return true;
if (!(val & NAPIF_STATE_SCHED)) return false;
new = val | NAPIF_STATE_MISSED; } while (!try_cmpxchg(&n->state, &val, new));
return true;}
enum netdev_queue_state_t { __QUEUE_STATE_DRV_XOFF, __QUEUE_STATE_STACK_XOFF, __QUEUE_STATE_FROZEN,};
#define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)#define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)#define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
#define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ QUEUE_STATE_FROZEN)#define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ QUEUE_STATE_FROZEN)
/* * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The * netif_tx_* functions below are used to manipulate this flag. The * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit * queue independently. The netif_xmit_*stopped functions below are called * to check if the queue has been stopped by the driver or stack (either * of the XOFF bits are set in the state). Drivers should not need to call * netif_xmit*stopped functions, they should only be using netif_tx_*. */
struct netdev_queue {/* * read-mostly part */ struct net_device *dev; netdevice_tracker dev_tracker;
struct Qdisc __rcu *qdisc; struct Qdisc __rcu *qdisc_sleeping;#ifdef CONFIG_SYSFS struct kobject kobj; const struct attribute_group **groups;#endif unsigned long tx_maxrate; /* * Number of TX timeouts for this queue * (/sys/class/net/DEV/Q/trans_timeout) */ atomic_long_t trans_timeout;
/* Subordinate device that the queue has been assigned to */ struct net_device *sb_dev;#ifdef CONFIG_XDP_SOCKETS /* "ops protected", see comment about net_device::lock */ struct xsk_buff_pool *pool;#endif
/* * write-mostly part */#ifdef CONFIG_BQL struct dql dql;#endif spinlock_t _xmit_lock ____cacheline_aligned_in_smp; int xmit_lock_owner; /* * Time (in jiffies) of last Tx */ unsigned long trans_start;
unsigned long state;
/* * slow- / control-path part */ /* NAPI instance for the queue * "ops protected", see comment about net_device::lock */ struct napi_struct *napi;
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) int numa_node;#endif} ____cacheline_aligned_in_smp;
extern int sysctl_fb_tunnels_only_for_init_net;extern int sysctl_devconf_inherit_init_net;
/* * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns * == 1 : For initns only * == 2 : For none. */static inline bool net_has_fallback_tunnels(const struct net *net){#if IS_ENABLED(CONFIG_SYSCTL) int fb_tunnels_only_for_init_net = READ_ONCE(sysctl_fb_tunnels_only_for_init_net);
return !fb_tunnels_only_for_init_net || (net_eq(net, &init_net) && fb_tunnels_only_for_init_net == 1);#else return true;#endif}
static inline int net_inherit_devconf(void){#if IS_ENABLED(CONFIG_SYSCTL) return READ_ONCE(sysctl_devconf_inherit_init_net);#else return 0;#endif}
static inline int netdev_queue_numa_node_read(const struct netdev_queue *q){#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) return q->numa_node;#else return NUMA_NO_NODE;#endif}
static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node){#if defined(CONFIG_XPS) && defined(CONFIG_NUMA) q->numa_node = node;#endif}
#ifdef CONFIG_RFS_ACCELbool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, u16 filter_id);#endif
/* XPS map type and offset of the xps map within net_device->xps_maps[]. */enum xps_map_type { XPS_CPUS = 0, XPS_RXQS, XPS_MAPS_MAX,};
#ifdef CONFIG_XPS/* * This structure holds an XPS map which can be of variable length. The * map is an array of queues. */struct xps_map { unsigned int len; unsigned int alloc_len; struct rcu_head rcu; u16 queues[];};#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))#define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ - sizeof(struct xps_map)) / sizeof(u16))
/* * This structure holds all XPS maps for device. Maps are indexed by CPU. * * We keep track of the number of cpus/rxqs used when the struct is allocated, * in nr_ids. This will help not accessing out-of-bound memory. * * We keep track of the number of traffic classes used when the struct is * allocated, in num_tc. This will be used to navigate the maps, to ensure we're * not crossing its upper bound, as the original dev->num_tc can be updated in * the meantime. */struct xps_dev_maps { struct rcu_head rcu; unsigned int nr_ids; s16 num_tc; struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */};
#define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \ (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
#define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\ (_rxqs * (_tcs) * sizeof(struct xps_map *)))
#endif /* CONFIG_XPS */
#define TC_MAX_QUEUE 16#define TC_BITMASK 15/* HW offloaded queuing disciplines txq count and offset maps */struct netdev_tc_txq { union { struct { u16 count; u16 offset; }; u32 combined; };};
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)/* * This structure is to hold information about the device * configured to run FCoE protocol stack. */struct netdev_fcoe_hbainfo { char manufacturer[64]; char serial_number[64]; char hardware_version[64]; char driver_version[64]; char optionrom_version[64]; char firmware_version[64]; char model[256]; char model_description[256];};#endif
#define MAX_PHYS_ITEM_ID_LEN 32
/* This structure holds a unique identifier to identify some * physical item (port for example) used by a netdevice. */struct netdev_phys_item_id { unsigned char id[MAX_PHYS_ITEM_ID_LEN]; unsigned char id_len;};
static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, struct netdev_phys_item_id *b){ return a->id_len == b->id_len && memcmp(a->id, b->id, a->id_len) == 0;}
typedef u16 (*select_queue_fallback_t)(struct net_device *dev, struct sk_buff *skb, struct net_device *sb_dev);
enum net_device_path_type { DEV_PATH_ETHERNET = 0, DEV_PATH_VLAN, DEV_PATH_BRIDGE, DEV_PATH_PPPOE, DEV_PATH_DSA, DEV_PATH_MTK_WDMA, DEV_PATH_TUN, DEV_PATH_IEEE80211,};
struct net_device_path { enum net_device_path_type type; const struct net_device *dev; union { struct { u16 id; __be16 proto; u8 h_dest[ETH_ALEN]; } encap; struct { struct dst_entry *dst; union { struct in_addr src_v4; struct in6_addr src_v6; }; union { struct in_addr dst_v4; struct in6_addr dst_v6; };
u8 inner_proto; } tun; struct { enum { DEV_PATH_BR_VLAN_KEEP, DEV_PATH_BR_VLAN_TAG, DEV_PATH_BR_VLAN_UNTAG, DEV_PATH_BR_VLAN_UNTAG_HW, } vlan_mode; u16 vlan_id; __be16 vlan_proto; } bridge; struct { int port; u16 proto; } dsa; struct { u8 wdma_idx; u8 queue; u16 wcid; u8 bss; u8 amsdu; } mtk_wdma; };};
#define NET_DEVICE_PATH_STACK_MAX 5#define NET_DEVICE_PATH_VLAN_MAX 2
struct net_device_path_stack { int num_paths; struct net_device_path path[NET_DEVICE_PATH_STACK_MAX];};
struct net_device_path_ctx { const struct net_device *dev; u8 daddr[ETH_ALEN]; __be16 ether_type;
int num_vlans; struct { u16 id; __be16 proto; } vlan[NET_DEVICE_PATH_VLAN_MAX];
bool ieee80211;};
enum tc_setup_type { TC_QUERY_CAPS, TC_SETUP_QDISC_MQPRIO, TC_SETUP_CLSU32, TC_SETUP_CLSFLOWER, TC_SETUP_CLSMATCHALL, TC_SETUP_CLSBPF, TC_SETUP_BLOCK, TC_SETUP_QDISC_CBS, TC_SETUP_QDISC_RED, TC_SETUP_QDISC_PRIO, TC_SETUP_QDISC_MQ, TC_SETUP_QDISC_ETF, TC_SETUP_ROOT_QDISC, TC_SETUP_QDISC_GRED, TC_SETUP_QDISC_TAPRIO, TC_SETUP_FT, TC_SETUP_QDISC_ETS, TC_SETUP_QDISC_TBF, TC_SETUP_QDISC_FIFO, TC_SETUP_QDISC_HTB, TC_SETUP_ACT,};
/* These structures hold the attributes of bpf state that are being passed * to the netdevice through the bpf op. */enum bpf_netdev_command { /* Set or clear a bpf program used in the earliest stages of packet * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee * is responsible for calling bpf_prog_put on any old progs that are * stored. In case of error, the callee need not release the new prog * reference, but on success it takes ownership and must bpf_prog_put * when it is no longer used. */ XDP_SETUP_PROG, XDP_SETUP_PROG_HW, /* BPF program for offload callbacks, invoked at program load time. */ BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE, XDP_SETUP_XSK_POOL,};
struct bpf_prog_offload_ops;struct netlink_ext_ack;struct xdp_umem;struct xdp_dev_bulk_queue;struct bpf_xdp_link;
enum bpf_xdp_mode { XDP_MODE_SKB = 0, XDP_MODE_DRV = 1, XDP_MODE_HW = 2, __MAX_XDP_MODE};
struct bpf_xdp_entity { struct bpf_prog *prog; struct bpf_xdp_link *link;};
struct netdev_bpf { enum bpf_netdev_command command; union { /* XDP_SETUP_PROG */ struct { u32 flags; struct bpf_prog *prog; struct netlink_ext_ack *extack; }; /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */ struct { struct bpf_offloaded_map *offmap; }; /* XDP_SETUP_XSK_POOL */ struct { struct xsk_buff_pool *pool; u16 queue_id; } xsk; };};
/* Flags for ndo_xsk_wakeup. */#define XDP_WAKEUP_RX (1 << 0)#define XDP_WAKEUP_TX (1 << 1)
#ifdef CONFIG_XFRM_OFFLOADstruct xfrmdev_ops { int (*xdo_dev_state_add)(struct net_device *dev, struct xfrm_state *x, struct netlink_ext_ack *extack); void (*xdo_dev_state_delete)(struct net_device *dev, struct xfrm_state *x); void (*xdo_dev_state_free)(struct net_device *dev, struct xfrm_state *x); bool (*xdo_dev_offload_ok) (struct sk_buff *skb, struct xfrm_state *x); void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); void (*xdo_dev_state_update_stats) (struct xfrm_state *x); int (*xdo_dev_policy_add) (struct xfrm_policy *x, struct netlink_ext_ack *extack); void (*xdo_dev_policy_delete) (struct xfrm_policy *x); void (*xdo_dev_policy_free) (struct xfrm_policy *x);};#endif
struct dev_ifalias { struct rcu_head rcuhead; char ifalias[];};
struct devlink;struct tlsdev_ops;
struct netdev_net_notifier { struct list_head list; struct notifier_block *nb;};
/* * This structure defines the management hooks for network devices. * The following hooks can be defined; unless noted otherwise, they are * optional and can be filled with a null pointer. * * int (*ndo_init)(struct net_device *dev); * This function is called once when a network device is registered. * The network device can use this for any late stage initialization * or semantic validation. It can fail with an error code which will * be propagated back to register_netdev. * * void (*ndo_uninit)(struct net_device *dev); * This function is called when device is unregistered or when registration * fails. It is not called if init fails. * * int (*ndo_open)(struct net_device *dev); * This function is called when a network device transitions to the up * state. * * int (*ndo_stop)(struct net_device *dev); * This function is called when a network device transitions to the down * state. * * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, * struct net_device *dev); * Called when a packet needs to be transmitted. * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop * the queue before that can happen; it's for obsolete devices and weird * corner cases, but the stack really does a non-trivial amount * of useless work if you return NETDEV_TX_BUSY. * Required; cannot be NULL. * * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, * struct net_device *dev * netdev_features_t features); * Called by core transmit path to determine if device is capable of * performing offload operations on a given packet. This is to give * the device an opportunity to implement any restrictions that cannot * be otherwise expressed by feature flags. The check is called with * the set of features that the stack has calculated and it returns * those the driver believes to be appropriate. * * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, * struct net_device *sb_dev); * Called to decide which queue to use when device supports multiple * transmit queues. * * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); * This function is called to allow device receiver to make * changes to configuration when multicast or promiscuous is enabled. * * void (*ndo_set_rx_mode)(struct net_device *dev); * This function is called device changes address list filtering. * If driver handles unicast address filtering, it should set * IFF_UNICAST_FLT in its priv_flags. * Cannot sleep, called with netif_addr_lock_bh held. * Deprecated in favor of ndo_set_rx_mode_async. * * int (*ndo_set_rx_mode_async)(struct net_device *dev, * struct netdev_hw_addr_list *uc, * struct netdev_hw_addr_list *mc); * Async version of ndo_set_rx_mode which runs in process context * with rtnl_lock and netdev_lock_ops(dev) held. The uc/mc parameters * are snapshots of the address lists - iterate with * netdev_hw_addr_list_for_each(ha, uc). Return 0 on success or a * negative errno to request a retry via the core backoff. * * void (*ndo_work)(struct net_device *dev, unsigned long events); * Run deferred work scheduled with netdev_work_sched(@events). * * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); * This function is called when the Media Access Control address * needs to be changed. If this interface is not defined, the * MAC address can not be changed. * * int (*ndo_validate_addr)(struct net_device *dev); * Test if Media Access Control address is valid for the device. * * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); * Old-style ioctl entry point. This is used internally by the * ieee802154 subsystem but is no longer called by the device * ioctl handler. * * int (*ndo_siocbond)(struct net_device *dev, struct ifreq *ifr, int cmd); * Used by the bonding driver for its device specific ioctls: * SIOCBONDENSLAVE, SIOCBONDRELEASE, SIOCBONDSETHWADDR, SIOCBONDCHANGEACTIVE, * SIOCBONDSLAVEINFOQUERY, and SIOCBONDINFOQUERY * * * int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); * Called for ethernet specific ioctls: SIOCGMIIPHY, SIOCGMIIREG and * SIOCSMIIREG. * * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); * Used to set network devices bus interface parameters. This interface * is retained for legacy reasons; new devices should use the bus * interface (PCI) for low level management. * * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); * Called when a user wants to change the Maximum Transfer Unit * of a device. * * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue); * Callback used when the transmitter has not made any progress * for dev->watchdog ticks. * * void (*ndo_get_stats64)(struct net_device *dev, * struct rtnl_link_stats64 *storage); * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); * Called when a user wants to get the network device usage * statistics. Drivers must do one of the following: * 1. Define @ndo_get_stats64 to fill in a zero-initialised * rtnl_link_stats64 structure passed by the caller. * 2. Define @ndo_get_stats to update a net_device_stats structure * (which should normally be dev->stats) and return a pointer to * it. The structure may be changed asynchronously only if each * field is written atomically. * 3. Update dev->stats asynchronously and atomically, and define * neither operation. * * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id) * Return true if this device supports offload stats of this attr_id. * * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, * void *attr_data) * Get statistics for offload operations by attr_id. Write it into the * attr_data pointer. * * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); * If device supports VLAN filtering this function is called when a * VLAN id is registered. * * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); * If device supports VLAN filtering this function is called when a * VLAN id is unregistered. * * void (*ndo_poll_controller)(struct net_device *dev); * * SR-IOV management functions. * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, * u8 qos, __be16 proto); * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, * int max_tx_rate); * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); * int (*ndo_get_vf_config)(struct net_device *dev, * int vf, struct ifla_vf_info *ivf); * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); * int (*ndo_set_vf_port)(struct net_device *dev, int vf, * struct nlattr *port[]); * * Enable or disable the VF ability to query its RSS Redirection Table and * Hash Key. This is needed since on some devices VF share this information * with PF and querying it may introduce a theoretical security risk. * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type, * void *type_data); * Called to setup any 'tc' scheduler, classifier or action on @dev. * This is always called from the stack with the rtnl lock held and netif * tx queues stopped. This allows the netdevice to perform queue * management safely. * * NB: Returning -EOPNOTSUPP for whatever commands means "this qdisc * is not offloaded (anymore, offloading may have silently stopped)", * and the offloading flag is cleared. Notably, this is also true for * dump queries (e.g. TC_*_STATS commands). If the underlying device does * not report any statistics but is still offloading, return 0 instead. * * Fiber Channel over Ethernet (FCoE) offload functions. * int (*ndo_fcoe_enable)(struct net_device *dev); * Called when the FCoE protocol stack wants to start using LLD for FCoE * so the underlying device can perform whatever needed configuration or * initialization to support acceleration of FCoE traffic. * * int (*ndo_fcoe_disable)(struct net_device *dev); * Called when the FCoE protocol stack wants to stop using LLD for FCoE * so the underlying device can perform whatever needed clean-ups to * stop supporting acceleration of FCoE traffic. * * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, * struct scatterlist *sgl, unsigned int sgc); * Called when the FCoE Initiator wants to initialize an I/O that * is a possible candidate for Direct Data Placement (DDP). The LLD can * perform necessary setup and returns 1 to indicate the device is set up * successfully to perform DDP on this I/O, otherwise this returns 0. * * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); * Called when the FCoE Initiator/Target is done with the DDPed I/O as * indicated by the FC exchange id 'xid', so the underlying device can * clean up and reuse resources for later DDP requests. * * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, * struct scatterlist *sgl, unsigned int sgc); * Called when the FCoE Target wants to initialize an I/O that * is a possible candidate for Direct Data Placement (DDP). The LLD can * perform necessary setup and returns 1 to indicate the device is set up * successfully to perform DDP on this I/O, otherwise this returns 0. * * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, * struct netdev_fcoe_hbainfo *hbainfo); * Called when the FCoE Protocol stack wants information on the underlying * device. This information is utilized by the FCoE protocol stack to * register attributes with Fiber Channel management service as per the * FC-GS Fabric Device Management Information(FDMI) specification. * * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); * Called when the underlying device wants to override default World Wide * Name (WWN) generation mechanism in FCoE protocol stack to pass its own * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE * protocol stack to use. * * RFS acceleration. * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, * u16 rxq_index, u32 flow_id); * Set hardware filter for RFS. rxq_index is the target queue index; * flow_id is a flow ID to be passed to rps_may_expire_flow() later. * Return the filter ID on success, or a negative error code. * * Slave management functions (for bridge, bonding, etc). * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); * Called to make another netdev an underling. * * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); * Called to release previously enslaved netdev. * * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev, * struct sk_buff *skb, * bool all_slaves); * Get the xmit slave of master device. If all_slaves is true, function * assume all the slaves can transmit. * * Feature/offload setting functions. * netdev_features_t (*ndo_fix_features)(struct net_device *dev, * netdev_features_t features); * Adjusts the requested feature flags according to device-specific * constraints, and returns the resulting flags. Must not modify * the device state. * * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); * Called to update device configuration to new features. Passed * feature set might be less than what was returned by ndo_fix_features()). * Must return >0 or -errno if it changed dev->features itself. * * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], * struct net_device *dev, * const unsigned char *addr, u16 vid, u16 flags, * bool *notified, struct netlink_ext_ack *extack); * Adds an FDB entry to dev for addr. * Callee shall set *notified to true if it sent any appropriate * notification(s). Otherwise core will send a generic one. * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], * struct net_device *dev, * const unsigned char *addr, u16 vid * bool *notified, struct netlink_ext_ack *extack); * Deletes the FDB entry from dev corresponding to addr. * Callee shall set *notified to true if it sent any appropriate * notification(s). Otherwise core will send a generic one. * int (*ndo_fdb_del_bulk)(struct nlmsghdr *nlh, struct net_device *dev, * struct netlink_ext_ack *extack); * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, * struct net_device *dev, struct net_device *filter_dev, * int *idx) * Used to add FDB entries to dump requests. Implementers should add * entries to skb and update idx with the number of entries. * * int (*ndo_mdb_add)(struct net_device *dev, struct nlattr *tb[], * u16 nlmsg_flags, struct netlink_ext_ack *extack); * Adds an MDB entry to dev. * int (*ndo_mdb_del)(struct net_device *dev, struct nlattr *tb[], * struct netlink_ext_ack *extack); * Deletes the MDB entry from dev. * int (*ndo_mdb_del_bulk)(struct net_device *dev, struct nlattr *tb[], * struct netlink_ext_ack *extack); * Bulk deletes MDB entries from dev. * int (*ndo_mdb_dump)(struct net_device *dev, struct sk_buff *skb, * struct netlink_callback *cb); * Dumps MDB entries from dev. The first argument (marker) in the netlink * callback is used by core rtnetlink code. * * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, * u16 flags, struct netlink_ext_ack *extack) * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, * struct net_device *dev, u32 filter_mask, * int nlflags) * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, * u16 flags); * * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); * Called to change device carrier. Soft-devices (like dummy, team, etc) * which do not represent real hardware may define this to allow their * userspace components to manage their virtual carrier state. Devices * that determine carrier state from physical hardware properties (eg * network cables) or protocol-dependent mechanisms (eg * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. * * int (*ndo_get_phys_port_id)(struct net_device *dev, * struct netdev_phys_item_id *ppid); * Called to get ID of physical port of this device. If driver does * not implement this, it is assumed that the hw is not able to have * multiple net devices on single physical port. * * int (*ndo_get_port_parent_id)(struct net_device *dev, * struct netdev_phys_item_id *ppid) * Called to get the parent ID of the physical port of this device. * * void* (*ndo_dfwd_add_station)(struct net_device *pdev, * struct net_device *dev) * Called by upper layer devices to accelerate switching or other * station functionality into hardware. 'pdev is the lowerdev * to use for the offload and 'dev' is the net device that will * back the offload. Returns a pointer to the private structure * the upper layer will maintain. * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) * Called by upper layer device to delete the station created * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing * the station and priv is the structure returned by the add * operation. * int (*ndo_set_tx_maxrate)(struct net_device *dev, * int queue_index, u32 maxrate); * Called when a user wants to set a max-rate limitation of specific * TX queue. * int (*ndo_get_iflink)(const struct net_device *dev); * Called to get the iflink value of this device. * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); * This function is used to get egress tunnel information for given skb. * This is useful for retrieving outer tunnel header parameters while * sampling packet. * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); * This function is used to specify the headroom that the skb must * consider when allocation skb during packet reception. Setting * appropriate rx headroom value allows avoiding skb head copy on * forward. Setting a negative value resets the rx headroom to the * default value. * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf); * This function is used to set or query state related to XDP on the * netdevice and manage BPF offload. See definition of * enum bpf_netdev_command for details. * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp, * u32 flags); * This function is used to submit @n XDP packets for transmit on a * netdevice. Returns number of frames successfully transmitted, frames * that got dropped are freed/returned via xdp_return_frame(). * Returns negative number, means general error invoking ndo, meaning * no frames were xmit'ed and core-caller will free all frames. * struct net_device *(*ndo_xdp_get_xmit_slave)(struct net_device *dev, * struct xdp_buff *xdp); * Get the xmit slave of master device based on the xdp_buff. * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags); * This function is used to wake up the softirq, ksoftirqd or kthread * responsible for sending and/or receiving packets on a specific * queue id bound to an AF_XDP socket. The flags field specifies if * only RX, only Tx, or both should be woken up using the flags * XDP_WAKEUP_RX and XDP_WAKEUP_TX. * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm_kern *p, * int cmd); * Add, change, delete or get information on an IPv4 tunnel. * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev); * If a device is paired with a peer device, return the peer instance. * The caller must be under RCU read context. * int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, struct net_device_path *path); * Get the forwarding path to reach the real device from the HW destination address * ktime_t (*ndo_get_tstamp)(struct net_device *dev, * const struct skb_shared_hwtstamps *hwtstamps, * bool cycles); * Get hardware timestamp based on normal/adjustable time or free running * cycle counter. This function is required if physical clock supports a * free running cycle counter. * * int (*ndo_hwtstamp_get)(struct net_device *dev, * struct kernel_hwtstamp_config *kernel_config); * Get the currently configured hardware timestamping parameters for the * NIC device. * * int (*ndo_hwtstamp_set)(struct net_device *dev, * struct kernel_hwtstamp_config *kernel_config, * struct netlink_ext_ack *extack); * Change the hardware timestamping parameters for NIC device. */struct net_device_ops { int (*ndo_init)(struct net_device *dev); void (*ndo_uninit)(struct net_device *dev); int (*ndo_open)(struct net_device *dev); int (*ndo_stop)(struct net_device *dev); netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev); netdev_features_t (*ndo_features_check)(struct sk_buff *skb, struct net_device *dev, netdev_features_t features); u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, struct net_device *sb_dev); void (*ndo_change_rx_flags)(struct net_device *dev, int flags); void (*ndo_set_rx_mode)(struct net_device *dev); int (*ndo_set_rx_mode_async)( struct net_device *dev, struct netdev_hw_addr_list *uc, struct netdev_hw_addr_list *mc); void (*ndo_work)(struct net_device *dev, unsigned long events); int (*ndo_set_mac_address)(struct net_device *dev, void *addr); int (*ndo_validate_addr)(struct net_device *dev); int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); int (*ndo_siocbond)(struct net_device *dev, struct ifreq *ifr, int cmd); int (*ndo_siocwandev)(struct net_device *dev, struct if_settings *ifs); int (*ndo_siocdevprivate)(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd); int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); int (*ndo_neigh_setup)(struct net_device *dev, struct neigh_parms *); void (*ndo_tx_timeout) (struct net_device *dev, unsigned int txqueue);
void (*ndo_get_stats64)(struct net_device *dev, struct rtnl_link_stats64 *storage); bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id); int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, void *attr_data); struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);#ifdef CONFIG_NET_POLL_CONTROLLER void (*ndo_poll_controller)(struct net_device *dev); int (*ndo_netpoll_setup)(struct net_device *dev); void (*ndo_netpoll_cleanup)(struct net_device *dev);#endif int (*ndo_set_vf_mac)(struct net_device *dev, int queue, u8 *mac); int (*ndo_set_vf_vlan)(struct net_device *dev, int queue, u16 vlan, u8 qos, __be16 proto); int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, int max_tx_rate); int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); int (*ndo_get_vf_config)(struct net_device *dev, int vf, struct ifla_vf_info *ivf); int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); int (*ndo_get_vf_stats)(struct net_device *dev, int vf, struct ifla_vf_stats *vf_stats); int (*ndo_set_vf_port)(struct net_device *dev, int vf, struct nlattr *port[]); int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); int (*ndo_get_vf_guid)(struct net_device *dev, int vf, struct ifla_vf_guid *node_guid, struct ifla_vf_guid *port_guid); int (*ndo_set_vf_guid)(struct net_device *dev, int vf, u64 guid, int guid_type); int (*ndo_set_vf_rss_query_en)( struct net_device *dev, int vf, bool setting); int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type, void *type_data);#if IS_ENABLED(CONFIG_FCOE) int (*ndo_fcoe_enable)(struct net_device *dev); int (*ndo_fcoe_disable)(struct net_device *dev); int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, struct scatterlist *sgl, unsigned int sgc); int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, struct scatterlist *sgl, unsigned int sgc); int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, struct netdev_fcoe_hbainfo *hbainfo);#endif
#if IS_ENABLED(CONFIG_LIBFCOE)#define NETDEV_FCOE_WWNN 0#define NETDEV_FCOE_WWPN 1 int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);#endif
#ifdef CONFIG_RFS_ACCEL int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, u16 rxq_index, u32 flow_id);#endif int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev, struct netlink_ext_ack *extack); int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev, struct sk_buff *skb, bool all_slaves); struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev, struct sock *sk); netdev_features_t (*ndo_fix_features)(struct net_device *dev, netdev_features_t features); int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); int (*ndo_neigh_construct)(struct net_device *dev, struct neighbour *n); void (*ndo_neigh_destroy)(struct net_device *dev, struct neighbour *n);
int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr, u16 vid, u16 flags, bool *notified, struct netlink_ext_ack *extack); int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr, u16 vid, bool *notified, struct netlink_ext_ack *extack); int (*ndo_fdb_del_bulk)(struct nlmsghdr *nlh, struct net_device *dev, struct netlink_ext_ack *extack); int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, struct net_device *dev, struct net_device *filter_dev, int *idx); int (*ndo_fdb_get)(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev, const unsigned char *addr, u16 vid, u32 portid, u32 seq, struct netlink_ext_ack *extack); int (*ndo_mdb_add)(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags, struct netlink_ext_ack *extack); int (*ndo_mdb_del)(struct net_device *dev, struct nlattr *tb[], struct netlink_ext_ack *extack); int (*ndo_mdb_del_bulk)(struct net_device *dev, struct nlattr *tb[], struct netlink_ext_ack *extack); int (*ndo_mdb_dump)(struct net_device *dev, struct sk_buff *skb, struct netlink_callback *cb); int (*ndo_mdb_get)(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq, struct netlink_ext_ack *extack); int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, u16 flags, struct netlink_ext_ack *extack); int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev, u32 filter_mask, int nlflags); int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, u16 flags); int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); int (*ndo_get_phys_port_id)(struct net_device *dev, struct netdev_phys_item_id *ppid); int (*ndo_get_port_parent_id)(struct net_device *dev, struct netdev_phys_item_id *ppid); int (*ndo_get_phys_port_name)(struct net_device *dev, char *name, size_t len); void* (*ndo_dfwd_add_station)(struct net_device *pdev, struct net_device *dev); void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv);
int (*ndo_set_tx_maxrate)(struct net_device *dev, int queue_index, u32 maxrate); int (*ndo_get_iflink)(const struct net_device *dev); int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf); int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp, u32 flags); struct net_device * (*ndo_xdp_get_xmit_slave)(struct net_device *dev, struct xdp_buff *xdp); int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags); int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm_kern *p, int cmd); struct net_device * (*ndo_get_peer_dev)(struct net_device *dev); int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, struct net_device_path *path); ktime_t (*ndo_get_tstamp)(struct net_device *dev, const struct skb_shared_hwtstamps *hwtstamps, bool cycles); int (*ndo_hwtstamp_get)(struct net_device *dev, struct kernel_hwtstamp_config *kernel_config); int (*ndo_hwtstamp_set)(struct net_device *dev, struct kernel_hwtstamp_config *kernel_config, struct netlink_ext_ack *extack);
#if IS_ENABLED(CONFIG_NET_SHAPER) /** * @net_shaper_ops: Device shaping offload operations * see include/net/net_shapers.h */ const struct net_shaper_ops *net_shaper_ops;#endif};
/** * enum netdev_priv_flags - &struct net_device priv_flags * * These are the &struct net_device, they are only set internally * by drivers and used in the kernel. These flags are invisible to * userspace; this means that the order of these flags can change * during any kernel release. * * You should add bitfield booleans after either net_device::priv_flags * (hotpath) or ::threaded (slowpath) instead of extending these flags. * * @IFF_802_1Q_VLAN: 802.1Q VLAN device * @IFF_EBRIDGE: Ethernet bridging device * @IFF_BONDING: bonding master or slave * @IFF_ISATAP: ISATAP interface (RFC4214) * @IFF_WAN_HDLC: WAN HDLC device * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to * release skb->dst * @IFF_DONT_BRIDGE: disallow bridging this ether dev * @IFF_DISABLE_NETPOLL: disable netpoll at run-time * @IFF_MACVLAN_PORT: device used as macvlan port * @IFF_BRIDGE_PORT: device used as bridge port * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit * @IFF_UNICAST_FLT: Supports unicast filtering * @IFF_TEAM_PORT: device used as team port * @IFF_SUPP_NOFCS: device supports sending custom FCS * @IFF_LIVE_ADDR_CHANGE: device supports hardware address * change when it's running * @IFF_MACVLAN: Macvlan device * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account * underlying stacked devices * @IFF_L3MDEV_MASTER: device is an L3 master device * @IFF_NO_QUEUE: device can run without qdisc attached * @IFF_OPENVSWITCH: device is a Open vSwitch master * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device * @IFF_TEAM: device is a team device * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external * entity (i.e. the master device for bridged veth) * @IFF_MACSEC: device is a MACsec device * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook * @IFF_FAILOVER: device is a failover master device * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device * @IFF_NO_ADDRCONF: prevent ipv6 addrconf * @IFF_TX_SKB_NO_LINEAR: device/driver is capable of xmitting frames with * skb_headlen(skb) == 0 (data starts from frag0) */enum netdev_priv_flags { IFF_802_1Q_VLAN = 1<<0, IFF_EBRIDGE = 1<<1, IFF_BONDING = 1<<2, IFF_ISATAP = 1<<3, IFF_WAN_HDLC = 1<<4, IFF_XMIT_DST_RELEASE = 1<<5, IFF_DONT_BRIDGE = 1<<6, IFF_DISABLE_NETPOLL = 1<<7, IFF_MACVLAN_PORT = 1<<8, IFF_BRIDGE_PORT = 1<<9, IFF_OVS_DATAPATH = 1<<10, IFF_TX_SKB_SHARING = 1<<11, IFF_UNICAST_FLT = 1<<12, IFF_TEAM_PORT = 1<<13, IFF_SUPP_NOFCS = 1<<14, IFF_LIVE_ADDR_CHANGE = 1<<15, IFF_MACVLAN = 1<<16, IFF_XMIT_DST_RELEASE_PERM = 1<<17, IFF_L3MDEV_MASTER = 1<<18, IFF_NO_QUEUE = 1<<19, IFF_OPENVSWITCH = 1<<20, IFF_L3MDEV_SLAVE = 1<<21, IFF_TEAM = 1<<22, IFF_PHONY_HEADROOM = 1<<24, IFF_MACSEC = 1<<25, IFF_NO_RX_HANDLER = 1<<26, IFF_FAILOVER = 1<<27, IFF_FAILOVER_SLAVE = 1<<28, IFF_L3MDEV_RX_HANDLER = 1<<29, IFF_NO_ADDRCONF = BIT_ULL(30), IFF_TX_SKB_NO_LINEAR = BIT_ULL(31),};
/* Specifies the type of the struct net_device::ml_priv pointer */enum netdev_ml_priv_type { ML_PRIV_NONE, ML_PRIV_CAN,};
enum netdev_stat_type { NETDEV_PCPU_STAT_NONE, NETDEV_PCPU_STAT_LSTATS, /* struct pcpu_lstats */ NETDEV_PCPU_STAT_TSTATS, /* struct pcpu_sw_netstats */ NETDEV_PCPU_STAT_DSTATS, /* struct pcpu_dstats */};
enum netmem_tx_mode { NETMEM_TX_NONE, /* no netmem TX support */ NETMEM_TX_DMA, /* DMA-capable netmem TX (real HW) */ NETMEM_TX_NO_DMA, /* no DMA, e.g. passthrough for virtual devs */};
enum netdev_reg_state { NETREG_UNINITIALIZED = 0, NETREG_REGISTERED, /* completed register_netdevice */ NETREG_UNREGISTERING, /* called unregister_netdevice */ NETREG_UNREGISTERED, /* completed unregister todo */ NETREG_RELEASED, /* called free_netdev */ NETREG_DUMMY, /* dummy device for NAPI poll */};
/** * struct net_device - The DEVICE structure. * * Actually, this whole structure is a big mistake. It mixes I/O * data with strictly "high-level" data, and it has to know about * almost every data structure used in the INET module. * * @priv_flags: flags invisible to userspace defined as bits, see * enum netdev_priv_flags for the definitions * @lltx: device supports lockless Tx. Deprecated for real HW * drivers. Mainly used by logical interfaces, such as * bonding and tunnels * @netmem_tx: device netmem TX mode * * @name: This is the first field of the "visible" part of this structure * (i.e. as seen by users in the "Space.c" file). It is the name * of the interface. * * @name_node: Name hashlist node * @ifalias: SNMP alias * @mem_end: Shared memory end * @mem_start: Shared memory start * @base_addr: Device I/O address * @irq: Device IRQ number * * @state: Generic network queuing layer state, see netdev_state_t * @dev_list: The global list of network devices * @napi_list: List entry used for polling NAPI devices * @unreg_list: List entry when we are unregistering the * device; see the function unregister_netdev * @unreg_list_net:List entry when we are unregistering the cross-netns * device; see the function unregister_netdevice_queue_net() * @close_list: List entry used when we are closing the device * @ptype_all: Device-specific packet handlers for all protocols * @ptype_specific: Device-specific, protocol-specific packet handlers * * @adj_list: Directly linked devices, like slaves for bonding * @features: Currently active device features * @hw_features: User-changeable features * * @wanted_features: User-requested features * @vlan_features: Mask of features inheritable by VLAN devices * * @hw_enc_features: Mask of features inherited by encapsulating devices * This field indicates what encapsulation * offloads the hardware is capable of doing, * and drivers will need to set them appropriately. * * @mpls_features: Mask of features inheritable by MPLS * @gso_partial_features: value(s) from NETIF_F_GSO\* * @mangleid_features: Mask of features requiring MANGLEID, will be * disabled together with the latter. * * @ifindex: interface index * @group: The group the device belongs to * * @stats: Statistics struct, which was left as a legacy, use * rtnl_link_stats64 instead * * @core_stats: core networking counters, * do not use this in drivers * @carrier_up_count: Number of times the carrier has been up * @carrier_down_count: Number of times the carrier has been down * * @wireless_handlers: List of functions to handle Wireless Extensions, * instead of ioctl, * see <net/iw_handler.h> for details. * * @netdev_ops: Includes several pointers to callbacks, * if one wants to override the ndo_*() functions * @xdp_metadata_ops: Includes pointers to XDP metadata callbacks. * @xsk_tx_metadata_ops: Includes pointers to AF_XDP TX metadata callbacks. * @ethtool_ops: Management operations * @l3mdev_ops: Layer 3 master device operations * @ndisc_ops: Includes callbacks for different IPv6 neighbour * discovery handling. Necessary for e.g. 6LoWPAN. * @xfrmdev_ops: Transformation offload operations * @tlsdev_ops: Transport Layer Security offload operations * @header_ops: Includes callbacks for creating,parsing,caching,etc * of Layer 2 headers. * * @flags: Interface flags (a la BSD) * @xdp_features: XDP capability supported by the device * @gflags: Global flags ( kept as legacy ) * @priv_len: Size of the ->priv flexible array * @priv: Flexible array containing private data * @operstate: RFC2863 operstate * @link_mode: Mapping policy to operstate * @if_port: Selectable AUI, TP, ... * @dma: DMA channel * @mtu: Interface MTU value * @min_mtu: Interface Minimum MTU value * @max_mtu: Interface Maximum MTU value * @type: Interface hardware type * @hard_header_len: Maximum hardware header length. * @min_header_len: Minimum hardware header length * * @needed_headroom: Extra headroom the hardware may need, but not in all * cases can this be guaranteed * @needed_tailroom: Extra tailroom the hardware may need, but not in all * cases can this be guaranteed. Some cases also use * LL_MAX_HEADER instead to allocate the skb * * interface address info: * * @perm_addr: Permanent hw address * @addr_assign_type: Hw address assignment type * @addr_len: Hardware address length * @upper_level: Maximum depth level of upper devices. * @lower_level: Maximum depth level of lower devices. * @threaded: napi threaded state. * @neigh_priv_len: Used in neigh_alloc() * @dev_id: Used to differentiate devices that share * the same link layer address * @dev_port: Used to differentiate devices that share * the same function * @addr_list_lock: XXX: need comments on this one * @name_assign_type: network interface name assignment type * @uc_promisc: Counter that indicates promiscuous mode * has been enabled due to the need to listen to * additional unicast addresses in a device that * does not implement ndo_set_rx_mode() * @work_node: List entry for async netdev_work processing * @work_tracker: Refcount tracker for async netdev_work * @work_pending: Driver-defined pending netdev_work, passed to * ndo_work() (see netdev_work_sched()) * @work_core_pending: Core-defined pending netdev_work (NETDEV_WORK_*) * @rx_mode_addr_cache: Recycled snapshot entries for rx_mode work * @rx_mode_retry_timer: Timer that re-queues rx_mode work after failure * @rx_mode_retry_count: Number of consecutive retries already scheduled * @uc: unicast mac addresses * @mc: multicast mac addresses * @dev_addrs: list of device hw addresses * @queues_kset: Group of all Kobjects in the Tx and RX queues * @promiscuity: Number of times the NIC is told to work in * promiscuous mode; if it becomes 0 the NIC will * exit promiscuous mode * @allmulti: Counter, enables or disables allmulticast mode * * @vlan_info: VLAN info * @dsa_ptr: dsa specific data * @tipc_ptr: TIPC specific data * @ip_ptr: IPv4 specific data * @ip6_ptr: IPv6 specific data * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network * device struct * @mpls_ptr: mpls_dev struct pointer * @mctp_ptr: MCTP specific data * @psp_dev: PSP crypto device registered for this netdev * * @dev_addr: Hw address (before bcast, * because most packets are unicast) * * @_rx: Array of RX queues * @num_rx_queues: Number of RX queues * allocated at register_netdev() time * @real_num_rx_queues: Number of RX queues currently active in device * @xdp_prog: XDP sockets filter program pointer * * @rx_handler: handler for received packets * @rx_handler_data: XXX: need comments on this one * @tcx_ingress: BPF & clsact qdisc specific data for ingress processing * @ingress_queue: XXX: need comments on this one * @nf_hooks_ingress: netfilter hooks executed for ingress packets * @broadcast: hw bcast address * * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, * indexed by RX queue number. Assigned by driver. * This must only be set if the ndo_rx_flow_steer * operation is defined * @index_hlist: Device index hash chain * * @_tx: Array of TX queues * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time * @real_num_tx_queues: Number of TX queues currently active in device * @qdisc: Root qdisc from userspace point of view * @tx_queue_len: Max frames per queue allowed * @tx_global_lock: XXX: need comments on this one * @xdp_bulkq: XDP device bulk queue * @xps_maps: all CPUs/RXQs maps for XPS device * * @xps_maps: XXX: need comments on this one * @tcx_egress: BPF & clsact qdisc specific data for egress processing * @nf_hooks_egress: netfilter hooks executed for egress packets * @qdisc_hash: qdisc hash table * @watchdog_timeo: Represents the timeout that is used by * the watchdog (see dev_watchdog()) * @watchdog_lock: protect watchdog_ref_held * @watchdog_ref_held: True if the watchdog device ref is taken. * @watchdog_timer: List of timers * * @proto_down_reason: reason a netdev interface is held down * @pcpu_refcnt: Number of references to this device * @dev_refcnt: Number of references to this device * @refcnt_tracker: Tracker directory for tracked references to this device * @todo_list: Delayed register/unregister * @link_watch_list: XXX: need comments on this one * * @reg_state: Register/unregister state machine * @dismantle: Device is going to be freed * @needs_free_netdev: Should unregister perform free_netdev? * @priv_destructor: Called from unregister * @npinfo: XXX: need comments on this one * @nd_net: Network namespace this network device is inside * protected by @lock * * @ml_priv: Mid-layer private * @ml_priv_type: Mid-layer private type * * @pcpu_stat_type: Type of device statistics which the core should * allocate/free: none, lstats, tstats, dstats. none * means the driver is handling statistics allocation/ * freeing internally. * @lstats: Loopback statistics: packets, bytes * @tstats: Tunnel statistics: RX/TX packets, RX/TX bytes * @dstats: Dummy statistics: RX/TX/drop packets, RX/TX bytes * * @garp_port: GARP * @mrp_port: MRP * * @dm_private: Drop monitor private * * @dev: Class/net/name entry * @sysfs_groups: Space for optional device, statistics and wireless * sysfs groups * * @sysfs_rx_queue_group: Space for optional per-rx queue attributes * @rtnl_link_ops: Rtnl_link_ops * @stat_ops: Optional ops for queue-aware statistics * @queue_mgmt_ops: Optional ops for queue management * * @gso_max_size: Maximum size of generic segmentation offload * @tso_max_size: Device (as in HW) limit on the max TSO request size * @gso_max_segs: Maximum number of segments that can be passed to the * NIC for GSO * @tso_max_segs: Device (as in HW) limit on the max TSO segment count * @gso_ipv4_max_size: Maximum size of generic segmentation offload, * for IPv4. * * @dcbnl_ops: Data Center Bridging netlink ops * @num_tc: Number of traffic classes in the net device * @tc_to_txq: XXX: need comments on this one * @prio_tc_map: XXX: need comments on this one * * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp * * @priomap: XXX: need comments on this one * @link_topo: Physical link topology tracking attached PHYs * @phydev: Physical device may attach itself * for hardware timestamping * @sfp_bus: attached &struct sfp_bus structure. * * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock * * @proto_down: protocol port state information can be sent to the * switch driver and used to set the phys state of the * switch port. * * @irq_affinity_auto: driver wants the core to store and re-assign the IRQ * affinity. Set by netif_enable_irq_affinity(), then * the driver must create a persistent napi by * netif_napi_add_config() and finally bind the napi to * IRQ (via netif_napi_set_irq()). * * @rx_cpu_rmap_auto: driver wants the core to manage the ARFS rmap. * Set by calling netif_enable_cpu_rmap(). * * @see_all_hwtstamp_requests: device wants to see calls to * ndo_hwtstamp_set() for all timestamp requests * regardless of source, even if those aren't * HWTSTAMP_SOURCE_NETDEV * @change_proto_down: device supports setting carrier via IFLA_PROTO_DOWN * @netns_immutable: interface can't change network namespaces * @fcoe_mtu: device supports maximum FCoE MTU, 2158 bytes * * @net_notifier_list: List of per-net netdev notifier block * that follow this device when it is moved * to another network namespace. * * @macsec_ops: MACsec offloading ops * * @udp_tunnel_nic_info: static structure describing the UDP tunnel * offload capabilities of the device * @udp_tunnel_nic: UDP tunnel offload state * @ethtool: ethtool related state * @xdp_state: stores info on attached XDP BPF programs * * @nested_level: Used as a parameter of spin_lock_nested() of * dev->addr_list_lock. * @unlink_list: As netif_addr_lock() can be called recursively, * keep a list of interfaces to be deleted. * @gro_max_size: Maximum size of aggregated packet in generic * receive offload (GRO) * @gro_ipv4_max_size: Maximum size of aggregated packet in generic * receive offload (GRO), for IPv4. * @xdp_zc_max_segs: Maximum number of segments supported by AF_XDP * zero copy driver * * @dev_addr_shadow: Copy of @dev_addr to catch direct writes. * @linkwatch_dev_tracker: refcount tracker used by linkwatch. * @watchdog_dev_tracker: refcount tracker used by watchdog. * @dev_registered_tracker: tracker for reference held while * registered * @offload_xstats_l3: L3 HW stats for this netdevice. * * @devlink_port: Pointer to related devlink port structure. * Assigned by a driver before netdev registration using * SET_NETDEV_DEVLINK_PORT macro. This pointer is static * during the time netdevice is registered. * * @dpll_pin: Pointer to the SyncE source pin of a DPLL subsystem, * where the clock is recovered. * * @max_pacing_offload_horizon: max EDT offload horizon in nsec. * @napi_config: An array of napi_config structures containing per-NAPI * settings. * @num_napi_configs: number of allocated NAPI config structs, * always >= max(num_rx_queues, num_tx_queues). * @gro_flush_timeout: timeout for GRO layer in NAPI * @napi_defer_hard_irqs: If not zero, provides a counter that would * allow to avoid NIC hard IRQ, on busy queues. * * @neighbours: List heads pointing to this device's neighbours' * dev_list, one per address-family. * @hwprov: Tracks which PTP performs hardware packet time stamping. * * FIXME: cleanup struct net_device such that network protocol info * moves out. */
struct net_device { /* Cacheline organization can be found documented in * Documentation/networking/net_cachelines/net_device.rst. * Please update the document when adding new fields. */
/* TX read-mostly hotpath */ __cacheline_group_begin(net_device_read_tx); struct_group(priv_flags_fast, unsigned long priv_flags:32; unsigned long lltx:1; unsigned long netmem_tx:2; ); const struct net_device_ops *netdev_ops; const struct header_ops *header_ops; struct netdev_queue *_tx; netdev_features_t gso_partial_features; unsigned int real_num_tx_queues; unsigned int gso_max_size; unsigned int gso_ipv4_max_size; u16 gso_max_segs; s16 num_tc; /* Note : dev->mtu is often read without holding a lock. * Writers usually hold RTNL. * It is recommended to use READ_ONCE() to annotate the reads, * and to use WRITE_ONCE() to annotate the writes. */ unsigned int mtu; unsigned short needed_headroom; struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];#ifdef CONFIG_XPS struct xps_dev_maps __rcu *xps_maps[XPS_MAPS_MAX];#endif#ifdef CONFIG_NETFILTER_EGRESS struct nf_hook_entries __rcu *nf_hooks_egress;#endif#ifdef CONFIG_NET_XGRESS struct bpf_mprog_entry __rcu *tcx_egress;#endif __cacheline_group_end(net_device_read_tx);
/* TXRX read-mostly hotpath */ __cacheline_group_begin(net_device_read_txrx); union { struct pcpu_lstats __percpu *lstats; struct pcpu_sw_netstats __percpu *tstats; struct pcpu_dstats __percpu *dstats; }; unsigned long state; unsigned int flags; unsigned short hard_header_len; enum netdev_stat_type pcpu_stat_type:8; netdev_features_t features; struct inet6_dev __rcu *ip6_ptr; __cacheline_group_end(net_device_read_txrx);
/* RX read-mostly hotpath */ __cacheline_group_begin(net_device_read_rx); struct bpf_prog __rcu *xdp_prog; struct list_head ptype_specific; int ifindex; unsigned int real_num_rx_queues; struct netdev_rx_queue *_rx; unsigned int gro_max_size; unsigned int gro_ipv4_max_size; rx_handler_func_t __rcu *rx_handler; void __rcu *rx_handler_data; possible_net_t nd_net;#ifdef CONFIG_NETPOLL struct netpoll_info __rcu *npinfo;#endif#ifdef CONFIG_NET_XGRESS struct bpf_mprog_entry __rcu *tcx_ingress;#endif __cacheline_group_end(net_device_read_rx);
char name[IFNAMSIZ]; struct netdev_name_node *name_node; struct dev_ifalias __rcu *ifalias; /* * I/O specific fields * FIXME: Merge these and struct ifmap into one */ unsigned long mem_end; unsigned long mem_start; unsigned long base_addr;
/* * Some hardware also needs these fields (state,dev_list, * napi_list,unreg_list,close_list) but they are not * part of the usual set specified in Space.c. */
struct list_head dev_list; struct list_head napi_list; struct list_head unreg_list;#ifdef CONFIG_DEBUG_NET_SMALL_RTNL struct list_head unreg_list_net;#endif struct list_head close_list; struct list_head ptype_all;
struct { struct list_head upper; struct list_head lower; } adj_list;
/* Read-mostly cache-line for fast-path access */ xdp_features_t xdp_features; const struct xdp_metadata_ops *xdp_metadata_ops; const struct xsk_tx_metadata_ops *xsk_tx_metadata_ops; unsigned short gflags;
unsigned short needed_tailroom;
netdev_features_t hw_features; netdev_features_t wanted_features; netdev_features_t vlan_features; netdev_features_t hw_enc_features; netdev_features_t mpls_features; netdev_features_t mangleid_features;
unsigned int min_mtu; unsigned int max_mtu; unsigned short type; unsigned char min_header_len; unsigned char name_assign_type;
int group;
struct net_device_stats stats; /* not used by modern drivers */
struct net_device_core_stats __percpu *core_stats;
/* Stats to monitor link on/off, flapping */ atomic_t carrier_up_count; atomic_t carrier_down_count;
#ifdef CONFIG_WIRELESS_EXT const struct iw_handler_def *wireless_handlers;#endif const struct ethtool_ops *ethtool_ops;#ifdef CONFIG_NET_L3_MASTER_DEV const struct l3mdev_ops *l3mdev_ops;#endif#if IS_ENABLED(CONFIG_IPV6) const struct ndisc_ops *ndisc_ops;#endif
#ifdef CONFIG_XFRM_OFFLOAD const struct xfrmdev_ops *xfrmdev_ops;#endif
#if IS_ENABLED(CONFIG_TLS_DEVICE) const struct tlsdev_ops *tlsdev_ops;#endif
unsigned int operstate; unsigned char link_mode;
unsigned char if_port; unsigned char dma;
/* Interface address info. */ unsigned char perm_addr[MAX_ADDR_LEN]; unsigned char addr_assign_type; unsigned char addr_len; unsigned char upper_level; unsigned char lower_level; u8 threaded;
unsigned short neigh_priv_len; unsigned short dev_id; unsigned short dev_port; int irq; u32 priv_len;
spinlock_t addr_list_lock;
struct netdev_hw_addr_list uc; struct netdev_hw_addr_list mc; struct netdev_hw_addr_list dev_addrs;
#ifdef CONFIG_SYSFS struct kset *queues_kset;#endif#ifdef CONFIG_LOCKDEP struct list_head unlink_list;#endif unsigned int promiscuity; unsigned int allmulti; bool uc_promisc; struct list_head work_node; netdevice_tracker work_tracker; unsigned long work_pending; unsigned long work_core_pending; struct netdev_hw_addr_list rx_mode_addr_cache; struct timer_list rx_mode_retry_timer; unsigned int rx_mode_retry_count;#ifdef CONFIG_LOCKDEP unsigned char nested_level;#endif
/* Protocol-specific pointers */ struct in_device __rcu *ip_ptr; /** @fib_nh_head: nexthops associated with this netdev */ struct hlist_head fib_nh_head;
#if IS_ENABLED(CONFIG_VLAN_8021Q) struct vlan_info __rcu *vlan_info;#endif#if IS_ENABLED(CONFIG_NET_DSA) struct dsa_port *dsa_ptr;#endif#if IS_ENABLED(CONFIG_TIPC) struct tipc_bearer __rcu *tipc_ptr;#endif#if IS_ENABLED(CONFIG_CFG80211) struct wireless_dev *ieee80211_ptr;#endif#if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN) struct wpan_dev *ieee802154_ptr;#endif#if IS_ENABLED(CONFIG_MPLS_ROUTING) struct mpls_dev __rcu *mpls_ptr;#endif#if IS_ENABLED(CONFIG_MCTP) struct mctp_dev __rcu *mctp_ptr;#endif#if IS_ENABLED(CONFIG_INET_PSP) struct psp_dev __rcu *psp_dev;#endif
/* * Cache lines mostly used on receive path (including eth_type_trans()) */ /* Interface address info used in eth_type_trans() */ const unsigned char *dev_addr;
unsigned int num_rx_queues;#define GRO_LEGACY_MAX_SIZE 65536u/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE), * and shinfo->gso_segs is a 16bit field. */#define GRO_MAX_SIZE (8 * 65535u) unsigned int xdp_zc_max_segs; struct netdev_queue __rcu *ingress_queue;#ifdef CONFIG_NETFILTER_INGRESS struct nf_hook_entries __rcu *nf_hooks_ingress;#endif
unsigned char broadcast[MAX_ADDR_LEN];#ifdef CONFIG_RFS_ACCEL struct cpu_rmap *rx_cpu_rmap;#endif struct hlist_node index_hlist;
/* * Cache lines mostly used on transmit path */ unsigned int num_tx_queues; struct Qdisc __rcu *qdisc; unsigned int tx_queue_len; spinlock_t tx_global_lock;
struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
#ifdef CONFIG_NET_SCHED DECLARE_HASHTABLE (qdisc_hash, 4);#endif /* These may be needed for future network-power-down code. */ struct timer_list watchdog_timer; int watchdog_timeo; spinlock_t watchdog_lock; bool watchdog_ref_held;
u32 proto_down_reason;
struct list_head todo_list;
#ifdef CONFIG_PCPU_DEV_REFCNT int __percpu *pcpu_refcnt;#else refcount_t dev_refcnt;#endif struct ref_tracker_dir refcnt_tracker;
struct list_head link_watch_list;
u8 reg_state;
bool dismantle;
/** @moving_ns: device is changing netns, protected by @lock */ bool moving_ns; /** @rtnl_link_initializing: Device being created, suppress events */ bool rtnl_link_initializing;
bool needs_free_netdev; void (*priv_destructor)(struct net_device *dev);
/* mid-layer private */ void *ml_priv; enum netdev_ml_priv_type ml_priv_type;
#if IS_ENABLED(CONFIG_GARP) struct garp_port __rcu *garp_port;#endif#if IS_ENABLED(CONFIG_MRP) struct mrp_port __rcu *mrp_port;#endif#if IS_ENABLED(CONFIG_NET_DROP_MONITOR) struct dm_hw_stat_delta __rcu *dm_private;#endif struct device dev; const struct attribute_group *sysfs_groups[5]; const struct attribute_group *sysfs_rx_queue_group;
const struct rtnl_link_ops *rtnl_link_ops;
const struct netdev_stat_ops *stat_ops;
const struct netdev_queue_mgmt_ops *queue_mgmt_ops;
/* for setting kernel sock attribute on TCP connection setup */#define GSO_MAX_SEGS 65535u#define GSO_LEGACY_MAX_SIZE 65536u/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE), * and shinfo->gso_segs is a 16bit field. */#define GSO_MAX_SIZE (8 * GSO_MAX_SEGS)
#define TSO_LEGACY_MAX_SIZE 65536#define TSO_MAX_SIZE UINT_MAX unsigned int tso_max_size;#define TSO_MAX_SEGS U16_MAX u16 tso_max_segs;
#ifdef CONFIG_DCB const struct dcbnl_rtnl_ops *dcbnl_ops;#endif u8 prio_tc_map[TC_BITMASK + 1];
#if IS_ENABLED(CONFIG_FCOE) unsigned int fcoe_ddp_xid;#endif#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) struct netprio_map __rcu *priomap;#endif struct phy_link_topology *link_topo; struct phy_device *phydev; struct sfp_bus *sfp_bus; struct lock_class_key *qdisc_tx_busylock; bool proto_down; bool irq_affinity_auto; bool rx_cpu_rmap_auto;
/* priv_flags_slow, ungrouped to save space */ unsigned long see_all_hwtstamp_requests:1; unsigned long change_proto_down:1; unsigned long netns_immutable:1; unsigned long fcoe_mtu:1;
struct list_head net_notifier_list;
#if IS_ENABLED(CONFIG_MACSEC) /* MACsec management functions */ const struct macsec_ops *macsec_ops;#endif const struct udp_tunnel_nic_info *udp_tunnel_nic_info; struct udp_tunnel_nic *udp_tunnel_nic;
/** @cfg: net_device queue-related configuration */ struct netdev_config *cfg; /** * @cfg_pending: same as @cfg but when device is being actively * reconfigured includes any changes to the configuration * requested by the user, but which may or may not be rejected. */ struct netdev_config *cfg_pending; struct ethtool_netdev_state *ethtool;
/* protected by rtnl_lock */ struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE];
u8 dev_addr_shadow[MAX_ADDR_LEN]; netdevice_tracker linkwatch_dev_tracker; netdevice_tracker watchdog_dev_tracker; netdevice_tracker dev_registered_tracker; struct rtnl_hw_stats64 *offload_xstats_l3;
struct devlink_port *devlink_port;
#if IS_ENABLED(CONFIG_DPLL) struct dpll_pin __rcu *dpll_pin;#endif#if IS_ENABLED(CONFIG_PAGE_POOL) /** @page_pools: page pools created for this netdevice */ struct hlist_head page_pools;#endif
/** @irq_moder: dim parameters used if IS_ENABLED(CONFIG_DIMLIB). */ struct dim_irq_moder *irq_moder;
u64 max_pacing_offload_horizon; struct napi_config *napi_config; u32 num_napi_configs; u32 napi_defer_hard_irqs; unsigned long gro_flush_timeout;
/** * @up: copy of @state's IFF_UP, but safe to read with just @lock. * May report false negatives while the device is being opened * or closed (@lock does not protect .ndo_open, or .ndo_close). */ bool up;
/** * @request_ops_lock: request the core to run all @netdev_ops and * @ethtool_ops under the @lock. */ bool request_ops_lock;
/** * @lock: netdev-scope lock, protects a small selection of fields. * Should always be taken using netdev_lock() / netdev_unlock() helpers. * Drivers are free to use it for other protection. * * For the drivers that implement shaper or queue API, the scope * of this lock is expanded to cover most ndo/queue/ethtool/sysfs * operations. Drivers may opt-in to this behavior by setting * @request_ops_lock. * * @lock protection mixes with rtnl_lock in multiple ways, fields are * either: * * - simply protected by the instance @lock; * * - double protected - writers hold both locks, readers hold either; * * - ops protected - protected by the lock held around the NDOs * and other callbacks, that is the instance lock on devices for * which netdev_need_ops_lock() returns true, otherwise by rtnl_lock; * * - double ops protected - always protected by rtnl_lock but for * devices for which netdev_need_ops_lock() returns true - also * the instance lock. * * Simply protects: * @gro_flush_timeout, @napi_defer_hard_irqs, @napi_list, * @net_shaper_hierarchy, @reg_state, @threaded * * Double protects: * @up, @moving_ns, @nd_net, @xdp_features * * Ops protects: * @cfg, @cfg_pending, @ethtool, @hwprov * * Double ops protects: * @real_num_rx_queues, @real_num_tx_queues * * Also protects some fields in: * struct napi_struct, struct netdev_queue, struct netdev_rx_queue * * Ordering: * * - take after rtnl_lock * * - for the case of netdev queue leasing, the netdev-scope lock is * taken for both the virtual and the physical device; to prevent * deadlocks, the virtual device's lock must always be acquired * before the physical device's (see netdev_nl_queue_create_doit) */ struct mutex lock;
#if IS_ENABLED(CONFIG_NET_SHAPER) /** * @net_shaper_hierarchy: data tracking the current shaper status * see include/net/net_shapers.h */ struct net_shaper_hierarchy *net_shaper_hierarchy;#endif
struct hlist_head neighbours[NEIGH_NR_TABLES];
struct hwtstamp_provider __rcu *hwprov;
u8 priv[] ____cacheline_aligned __counted_by(priv_len);} ____cacheline_aligned;#define to_net_dev(d) container_of(d, struct net_device, dev)
/* * Driver should use this to assign devlink port instance to a netdevice * before it registers the netdevice. Therefore devlink_port is static * during the netdev lifetime after it is registered. */#define SET_NETDEV_DEVLINK_PORT(dev, port) \({ \ WARN_ON((dev)->reg_state != NETREG_UNINITIALIZED); \ ((dev)->devlink_port = (port)); \})
static inline bool netif_elide_gro(const struct net_device *dev){ if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog) return true; return false;}
#define NETDEV_ALIGN 32
static inlineint netdev_get_prio_tc_map(const struct net_device *dev, u32 prio){ return READ_ONCE(dev->prio_tc_map[prio & TC_BITMASK]);}
static inlineint netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc){ if (tc >= READ_ONCE(dev->num_tc)) return -EINVAL;
WRITE_ONCE(dev->prio_tc_map[prio & TC_BITMASK], tc & TC_BITMASK); return 0;}
int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);void netdev_reset_tc(struct net_device *dev);int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
static inlineint netdev_get_num_tc(const struct net_device *dev){ return READ_ONCE(dev->num_tc);}
static inline void net_prefetch(void *p){ prefetch(p);#if L1_CACHE_BYTES < 128 prefetch((u8 *)p + L1_CACHE_BYTES);#endif}
static inline void net_prefetchw(void *p){ prefetchw(p);#if L1_CACHE_BYTES < 128 prefetchw((u8 *)p + L1_CACHE_BYTES);#endif}
void netdev_unbind_sb_channel(struct net_device *dev, struct net_device *sb_dev);int netdev_bind_sb_channel_queue(struct net_device *dev, struct net_device *sb_dev, u8 tc, u16 count, u16 offset);int netdev_set_sb_channel(struct net_device *dev, u16 channel);static inline int netdev_get_sb_channel(struct net_device *dev){ return max_t(int, -READ_ONCE(dev->num_tc), 0);}
static inlinestruct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, unsigned int index){ DEBUG_NET_WARN_ON_ONCE(index >= dev->num_tx_queues); return &dev->_tx[index];}
static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, const struct sk_buff *skb){ return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));}
static inline void netdev_for_each_tx_queue(struct net_device *dev, void (*f)(struct net_device *, struct netdev_queue *, void *), void *arg){ unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) f(dev, &dev->_tx[i], arg);}
u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb, struct net_device *sb_dev);struct netdev_queue *netdev_core_pick_tx(struct net_device *dev, struct sk_buff *skb, struct net_device *sb_dev);
/* returns the headroom that the master device needs to take in account * when forwarding to this dev */static inline unsigned netdev_get_fwd_headroom(struct net_device *dev){ return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;}
static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr){ if (dev->netdev_ops->ndo_set_rx_headroom) dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);}
/* set the device rx headroom to the dev's default */static inline void netdev_reset_rx_headroom(struct net_device *dev){ netdev_set_rx_headroom(dev, -1);}
static inline void *netdev_get_ml_priv(struct net_device *dev, enum netdev_ml_priv_type type){ if (dev->ml_priv_type != type) return NULL;
return dev->ml_priv;}
static inline void netdev_set_ml_priv(struct net_device *dev, void *ml_priv, enum netdev_ml_priv_type type){ WARN(dev->ml_priv_type && dev->ml_priv_type != type, "Overwriting already set ml_priv_type (%u) with different ml_priv_type (%u)!\n", dev->ml_priv_type, type); WARN(!dev->ml_priv_type && dev->ml_priv, "Overwriting already set ml_priv and ml_priv_type is ML_PRIV_NONE!\n");
dev->ml_priv = ml_priv; dev->ml_priv_type = type;}
/* * Net namespace inlines */static inlinestruct net *dev_net(const struct net_device *dev){ return read_pnet(&dev->nd_net);}
static inlinestruct net *dev_net_rcu(const struct net_device *dev){ return read_pnet_rcu(&dev->nd_net);}
static inlinevoid dev_net_set(struct net_device *dev, struct net *net){ write_pnet(&dev->nd_net, net);}
/** * netdev_priv - access network device private data * @dev: network device * * Get network device private data */static inline void *netdev_priv(const struct net_device *dev){ return (void *)dev->priv;}
/** * netdev_from_priv() - get network device from priv * @priv: network device private data * * Returns: net_device to which @priv belongs */static inline struct net_device *netdev_from_priv(const void *priv){ return container_of(priv, struct net_device, priv);}
/* Set the sysfs physical device reference for the network logical device * if set prior to registration will cause a symlink during initialization. */#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
/* Set the sysfs device type for the network logical device to allow * fine-grained identification of different network device types. For * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. */#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
void netif_queue_set_napi(struct net_device *dev, unsigned int queue_index, enum netdev_queue_type type, struct napi_struct *napi);
static inline void netdev_lock(struct net_device *dev){ mutex_lock(&dev->lock);}
static inline void netdev_unlock(struct net_device *dev){ mutex_unlock(&dev->lock);}/* Additional netdev_lock()-related helpers are in net/netdev_lock.h */
void netif_napi_set_irq_locked(struct napi_struct *napi, int irq);
static inline void netif_napi_set_irq(struct napi_struct *napi, int irq){ netdev_lock(napi->dev); netif_napi_set_irq_locked(napi, irq); netdev_unlock(napi->dev);}
/* Default NAPI poll() weight * Device drivers are strongly advised to not use bigger value */#define NAPI_POLL_WEIGHT 64
void netif_napi_add_weight_locked(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int), int weight);
static inline voidnetif_napi_add_weight(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int), int weight){ netdev_lock(dev); netif_napi_add_weight_locked(dev, napi, poll, weight); netdev_unlock(dev);}
/** * netif_napi_add() - initialize a NAPI context * @dev: network device * @napi: NAPI context * @poll: polling function * * netif_napi_add() must be used to initialize a NAPI context prior to calling * *any* of the other NAPI-related functions. */static inline voidnetif_napi_add(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int)){ netif_napi_add_weight(dev, napi, poll, NAPI_POLL_WEIGHT);}
static inline voidnetif_napi_add_locked(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int)){ netif_napi_add_weight_locked(dev, napi, poll, NAPI_POLL_WEIGHT);}
static inline voidnetif_napi_add_tx_weight(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int), int weight){ set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); netif_napi_add_weight(dev, napi, poll, weight);}
static inline voidnetif_napi_add_config_locked(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int), int index){ napi->index = index; napi->config = &dev->napi_config[index]; netif_napi_add_weight_locked(dev, napi, poll, NAPI_POLL_WEIGHT);}
/** * netif_napi_add_config - initialize a NAPI context with persistent config * @dev: network device * @napi: NAPI context * @poll: polling function * @index: the NAPI index */static inline voidnetif_napi_add_config(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int), int index){ netdev_lock(dev); netif_napi_add_config_locked(dev, napi, poll, index); netdev_unlock(dev);}
/** * netif_napi_add_tx() - initialize a NAPI context to be used for Tx only * @dev: network device * @napi: NAPI context * @poll: polling function * * This variant of netif_napi_add() should be used from drivers using NAPI * to exclusively poll a TX queue. * This will avoid we add it into napi_hash[], thus polluting this hash table. */static inline void netif_napi_add_tx(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int)){ netif_napi_add_tx_weight(dev, napi, poll, NAPI_POLL_WEIGHT);}
void __netif_napi_del_locked(struct napi_struct *napi);
/** * __netif_napi_del - remove a NAPI context * @napi: NAPI context * * Warning: caller must observe RCU grace period before freeing memory * containing @napi. Drivers might want to call this helper to combine * all the needed RCU grace periods into a single one. */static inline void __netif_napi_del(struct napi_struct *napi){ netdev_lock(napi->dev); __netif_napi_del_locked(napi); netdev_unlock(napi->dev);}
static inline void netif_napi_del_locked(struct napi_struct *napi){ __netif_napi_del_locked(napi); synchronize_net();}
/** * netif_napi_del - remove a NAPI context * @napi: NAPI context * * netif_napi_del() removes a NAPI context from the network device NAPI list */static inline void netif_napi_del(struct napi_struct *napi){ __netif_napi_del(napi); synchronize_net();}
int netif_enable_cpu_rmap(struct net_device *dev, unsigned int num_irqs);void netif_set_affinity_auto(struct net_device *dev);
struct packet_type { __be16 type; /* This is really htons(ether_type). */ bool ignore_outgoing; struct net_device *dev; /* NULL is wildcarded here */ netdevice_tracker dev_tracker; int (*func) (struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *); void (*list_func) (struct list_head *, struct packet_type *, struct net_device *); bool (*id_match)(struct packet_type *ptype, struct sock *sk); struct net *af_packet_net; void *af_packet_priv; struct list_head list;};
struct offload_callbacks { struct sk_buff *(*gso_segment)(struct sk_buff *skb, netdev_features_t features); struct sk_buff *(*gro_receive)(struct list_head *head, struct sk_buff *skb); int (*gro_complete)(struct sk_buff *skb, int nhoff);};
struct packet_offload { __be16 type; /* This is really htons(ether_type). */ u16 priority; struct offload_callbacks callbacks; struct list_head list;};
/* often modified stats are per-CPU, other are shared (netdev->stats) */struct pcpu_sw_netstats { u64_stats_t rx_packets; u64_stats_t rx_bytes; u64_stats_t tx_packets; u64_stats_t tx_bytes; struct u64_stats_sync syncp;} __aligned(4 * sizeof(u64));
struct pcpu_dstats { u64_stats_t rx_packets; u64_stats_t rx_bytes; u64_stats_t tx_packets; u64_stats_t tx_bytes; u64_stats_t rx_drops; u64_stats_t tx_drops; struct u64_stats_sync syncp;} __aligned(8 * sizeof(u64));
struct pcpu_lstats { u64_stats_t packets; u64_stats_t bytes; struct u64_stats_sync syncp;} __aligned(2 * sizeof(u64));
void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len){ struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&tstats->syncp); u64_stats_add(&tstats->rx_bytes, len); u64_stats_inc(&tstats->rx_packets); u64_stats_update_end(&tstats->syncp);}
static inline void dev_sw_netstats_tx_add(struct net_device *dev, unsigned int packets, unsigned int len){ struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
u64_stats_update_begin(&tstats->syncp); u64_stats_add(&tstats->tx_bytes, len); u64_stats_add(&tstats->tx_packets, packets); u64_stats_update_end(&tstats->syncp);}
static inline void dev_lstats_add(struct net_device *dev, unsigned int len){ struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
u64_stats_update_begin(&lstats->syncp); u64_stats_add(&lstats->bytes, len); u64_stats_inc(&lstats->packets); u64_stats_update_end(&lstats->syncp);}
static inline void dev_dstats_rx_add(struct net_device *dev, unsigned int len){ struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);
u64_stats_update_begin(&dstats->syncp); u64_stats_inc(&dstats->rx_packets); u64_stats_add(&dstats->rx_bytes, len); u64_stats_update_end(&dstats->syncp);}
static inline void dev_dstats_rx_dropped(struct net_device *dev){ struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);
u64_stats_update_begin(&dstats->syncp); u64_stats_inc(&dstats->rx_drops); u64_stats_update_end(&dstats->syncp);}
static inline void dev_dstats_rx_dropped_add(struct net_device *dev, unsigned int packets){ struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);
u64_stats_update_begin(&dstats->syncp); u64_stats_add(&dstats->rx_drops, packets); u64_stats_update_end(&dstats->syncp);}
static inline void dev_dstats_tx_add(struct net_device *dev, unsigned int len){ struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);
u64_stats_update_begin(&dstats->syncp); u64_stats_inc(&dstats->tx_packets); u64_stats_add(&dstats->tx_bytes, len); u64_stats_update_end(&dstats->syncp);}
static inline void dev_dstats_tx_dropped(struct net_device *dev){ struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);
u64_stats_update_begin(&dstats->syncp); u64_stats_inc(&dstats->tx_drops); u64_stats_update_end(&dstats->syncp);}
#define __netdev_alloc_pcpu_stats(type, gfp) \({ \ typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ if (pcpu_stats) { \ int __cpu; \ for_each_possible_cpu(__cpu) { \ typeof(type) *stat; \ stat = per_cpu_ptr(pcpu_stats, __cpu); \ u64_stats_init(&stat->syncp); \ } \ } \ pcpu_stats; \})
#define netdev_alloc_pcpu_stats(type) \ __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
#define devm_netdev_alloc_pcpu_stats(dev, type) \({ \ typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\ if (pcpu_stats) { \ int __cpu; \ for_each_possible_cpu(__cpu) { \ typeof(type) *stat; \ stat = per_cpu_ptr(pcpu_stats, __cpu); \ u64_stats_init(&stat->syncp); \ } \ } \ pcpu_stats; \})
enum netdev_lag_tx_type { NETDEV_LAG_TX_TYPE_UNKNOWN, NETDEV_LAG_TX_TYPE_RANDOM, NETDEV_LAG_TX_TYPE_BROADCAST, NETDEV_LAG_TX_TYPE_ROUNDROBIN, NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, NETDEV_LAG_TX_TYPE_HASH,};
enum netdev_lag_hash { NETDEV_LAG_HASH_NONE, NETDEV_LAG_HASH_L2, NETDEV_LAG_HASH_L34, NETDEV_LAG_HASH_L23, NETDEV_LAG_HASH_E23, NETDEV_LAG_HASH_E34, NETDEV_LAG_HASH_VLAN_SRCMAC, NETDEV_LAG_HASH_UNKNOWN,};
struct netdev_lag_upper_info { enum netdev_lag_tx_type tx_type; enum netdev_lag_hash hash_type;};
struct netdev_lag_lower_state_info { u8 link_up : 1, tx_enabled : 1;};
#include <linux/notifier.h>
/* netdevice notifier chain. Please remember to update netdev_cmd_to_name() * and the rtnetlink notification exclusion list in rtnetlink_event() when * adding new types. */enum netdev_cmd { NETDEV_UP = 1, /* For now you can't veto a device up/down */ NETDEV_DOWN, NETDEV_REBOOT, /* Tell a protocol stack a network interface detected a hardware crash and restarted - we can use this eg to kick tcp sessions once done */ NETDEV_CHANGE, /* Notify device state change */ NETDEV_REGISTER, NETDEV_UNREGISTER, NETDEV_CHANGEMTU, /* notify after mtu change happened */ NETDEV_CHANGEADDR, /* notify after the address change */ NETDEV_PRE_CHANGEADDR, /* notify before the address change */ NETDEV_GOING_DOWN, NETDEV_CHANGENAME, NETDEV_FEAT_CHANGE, NETDEV_BONDING_FAILOVER, NETDEV_PRE_UP, NETDEV_PRE_TYPE_CHANGE, NETDEV_POST_TYPE_CHANGE, NETDEV_POST_INIT, NETDEV_PRE_UNINIT, NETDEV_RELEASE, NETDEV_NOTIFY_PEERS, NETDEV_JOIN, NETDEV_CHANGEUPPER, NETDEV_RESEND_IGMP, NETDEV_PRECHANGEMTU, /* notify before mtu change happened */ NETDEV_CHANGEINFODATA, NETDEV_BONDING_INFO, NETDEV_PRECHANGEUPPER, NETDEV_CHANGELOWERSTATE, NETDEV_UDP_TUNNEL_PUSH_INFO, NETDEV_UDP_TUNNEL_DROP_INFO, NETDEV_CHANGE_TX_QUEUE_LEN, NETDEV_CVLAN_FILTER_PUSH_INFO, NETDEV_CVLAN_FILTER_DROP_INFO, NETDEV_SVLAN_FILTER_PUSH_INFO, NETDEV_SVLAN_FILTER_DROP_INFO, NETDEV_OFFLOAD_XSTATS_ENABLE, NETDEV_OFFLOAD_XSTATS_DISABLE, NETDEV_OFFLOAD_XSTATS_REPORT_USED, NETDEV_OFFLOAD_XSTATS_REPORT_DELTA, NETDEV_XDP_FEAT_CHANGE,};const char *netdev_cmd_to_name(enum netdev_cmd cmd);
int register_netdevice_notifier(struct notifier_block *nb);int unregister_netdevice_notifier(struct notifier_block *nb);int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);int unregister_netdevice_notifier_net(struct net *net, struct notifier_block *nb);int register_netdevice_notifier_dev_net(struct net_device *dev, struct notifier_block *nb, struct netdev_net_notifier *nn);int unregister_netdevice_notifier_dev_net(struct net_device *dev, struct notifier_block *nb, struct netdev_net_notifier *nn);
struct netdev_notifier_info { struct net_device *dev; struct netlink_ext_ack *extack;};
struct netdev_notifier_info_ext { struct netdev_notifier_info info; /* must be first */ union { u32 mtu; } ext;};
struct netdev_notifier_change_info { struct netdev_notifier_info info; /* must be first */ unsigned int flags_changed;};
struct netdev_notifier_changeupper_info { struct netdev_notifier_info info; /* must be first */ struct net_device *upper_dev; /* new upper dev */ bool master; /* is upper dev master */ bool linking; /* is the notification for link or unlink */ void *upper_info; /* upper dev info */};
struct netdev_notifier_changelowerstate_info { struct netdev_notifier_info info; /* must be first */ void *lower_state_info; /* is lower dev state */};
struct netdev_notifier_pre_changeaddr_info { struct netdev_notifier_info info; /* must be first */ const unsigned char *dev_addr;};
enum netdev_offload_xstats_type { NETDEV_OFFLOAD_XSTATS_TYPE_L3 = 1,};
struct netdev_notifier_offload_xstats_info { struct netdev_notifier_info info; /* must be first */ enum netdev_offload_xstats_type type;
union { /* NETDEV_OFFLOAD_XSTATS_REPORT_DELTA */ struct netdev_notifier_offload_xstats_rd *report_delta; /* NETDEV_OFFLOAD_XSTATS_REPORT_USED */ struct netdev_notifier_offload_xstats_ru *report_used; };};
int netdev_offload_xstats_enable(struct net_device *dev, enum netdev_offload_xstats_type type, struct netlink_ext_ack *extack);int netdev_offload_xstats_disable(struct net_device *dev, enum netdev_offload_xstats_type type);bool netdev_offload_xstats_enabled(const struct net_device *dev, enum netdev_offload_xstats_type type);int netdev_offload_xstats_get(struct net_device *dev, enum netdev_offload_xstats_type type, struct rtnl_hw_stats64 *stats, bool *used, struct netlink_ext_ack *extack);voidnetdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *rd, const struct rtnl_hw_stats64 *stats);voidnetdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *ru);void netdev_offload_xstats_push_delta(struct net_device *dev, enum netdev_offload_xstats_type type, const struct rtnl_hw_stats64 *stats);
static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, struct net_device *dev){ info->dev = dev; info->extack = NULL;}
static inline struct net_device *netdev_notifier_info_to_dev(const struct netdev_notifier_info *info){ return info->dev;}
static inline struct netlink_ext_ack *netdev_notifier_info_to_extack(const struct netdev_notifier_info *info){ return info->extack;}
int call_netdevice_notifiers(unsigned long val, struct net_device *dev);int call_netdevice_notifiers_info(unsigned long val, struct netdev_notifier_info *info);
#define for_each_netdev(net, d) \ list_for_each_entry(d, &(net)->dev_base_head, dev_list)#define for_each_netdev_reverse(net, d) \ list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)#define for_each_netdev_rcu(net, d) \ list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)#define for_each_netdev_safe(net, d, n) \ list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)#define for_each_netdev_continue(net, d) \ list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)#define for_each_netdev_continue_reverse(net, d) \ list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \ dev_list)#define for_each_netdev_continue_rcu(net, d) \ list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)#define for_each_netdev_in_bond_rcu(bond, slave) \ for_each_netdev_rcu(dev_net_rcu(bond), slave) \ if (netdev_master_upper_dev_get_rcu(slave) == (bond))#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
#define for_each_netdev_dump(net, d, ifindex) \ for (; (d = xa_find(&(net)->dev_by_index, &ifindex, \ ULONG_MAX, XA_PRESENT)); ifindex++)
static inline struct net_device *next_net_device(struct net_device *dev){ struct list_head *lh; struct net *net;
net = dev_net(dev); lh = dev->dev_list.next; return lh == &net->dev_base_head ? NULL : net_device_entry(lh);}
static inline struct net_device *next_net_device_rcu(struct net_device *dev){ struct list_head *lh; struct net *net;
net = dev_net(dev); lh = rcu_dereference(list_next_rcu(&dev->dev_list)); return lh == &net->dev_base_head ? NULL : net_device_entry(lh);}
static inline struct net_device *first_net_device(struct net *net){ return list_empty(&net->dev_base_head) ? NULL : net_device_entry(net->dev_base_head.next);}
struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, const char *hwaddr);struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, const char *hwaddr);struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);void dev_add_pack(struct packet_type *pt);void dev_remove_pack(struct packet_type *pt);void __dev_remove_pack(struct packet_type *pt);void dev_add_offload(struct packet_offload *po);void dev_remove_offload(struct packet_offload *po);
int dev_get_iflink(const struct net_device *dev);int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);int dev_fill_forward_path(struct net_device_path_ctx *ctx, struct net_device_path_stack *stack);void dev_fill_forward_path_release(struct net_device_path_stack *stack);struct net_device *dev_get_by_name(struct net *net, const char *name);struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);struct net_device *__dev_get_by_name(struct net *net, const char *name);bool netdev_name_in_use(struct net *net, const char *name);int dev_alloc_name(struct net_device *dev, const char *name);int netif_open(struct net_device *dev, struct netlink_ext_ack *extack);int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);void netif_close(struct net_device *dev);void dev_close(struct net_device *dev);void netif_close_many(struct list_head *head, bool unlink);void netif_disable_lro(struct net_device *dev);void dev_disable_lro(struct net_device *dev);int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb, struct net_device *sb_dev);
int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev);int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
static inline int dev_queue_xmit(struct sk_buff *skb){ return __dev_queue_xmit(skb, NULL);}
static inline int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev){ return __dev_queue_xmit(skb, sb_dev);}
static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id){ int ret;
ret = __dev_direct_xmit(skb, queue_id); if (!dev_xmit_complete(ret)) kfree_skb(skb); return ret;}
int register_netdevice(struct net_device *dev);void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);void unregister_netdevice_many(struct list_head *head);bool unregister_netdevice_queued(const struct net_device *dev);
static inline void unregister_netdevice(struct net_device *dev){ unregister_netdevice_queue(dev, NULL);}
#ifdef CONFIG_DEBUG_NET_SMALL_RTNLvoid unregister_netdevice_queue_net(struct net *net, struct net_device *dev, struct list_head *head);void unregister_netdevice_many_net(struct net *net);void unregister_netdevice_queue_many_net(struct net *net, struct list_head *head);#elsestatic inline void unregister_netdevice_queue_net(struct net *net, struct net_device *dev, struct list_head *head){ unregister_netdevice_queue(dev, head);}
static inline void unregister_netdevice_queue_many_net(struct net *net, struct list_head *head){}#endif
int netdev_refcnt_read(const struct net_device *dev);void free_netdev(struct net_device *dev);
struct net_device *netdev_get_xmit_slave(struct net_device *dev, struct sk_buff *skb, bool all_slaves);struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev, struct sock *sk);struct net_device *dev_get_by_index(struct net *net, int ifindex);struct net_device *__dev_get_by_index(struct net *net, int ifindex);struct net_device *netdev_get_by_index(struct net *net, int ifindex, netdevice_tracker *tracker, gfp_t gfp);struct net_device *netdev_get_by_index_lock(struct net *net, int ifindex);struct net_device *netdev_get_by_name(struct net *net, const char *name, netdevice_tracker *tracker, gfp_t gfp);struct net_device *netdev_get_by_flags_rcu(struct net *net, netdevice_tracker *tracker, unsigned short flags, unsigned short mask);struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);void netdev_copy_name(struct net_device *dev, char *name);
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, const void *daddr, const void *saddr, unsigned int len){ if (!dev->header_ops || !dev->header_ops->create) return 0;
return dev->header_ops->create(skb, dev, type, daddr, saddr, len);}
static inline int dev_parse_header(const struct sk_buff *skb, unsigned char *haddr){ const struct net_device *dev = skb->dev;
if (!dev->header_ops || !dev->header_ops->parse) return 0; return dev->header_ops->parse(skb, dev, haddr);}
static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb){ const struct net_device *dev = skb->dev;
if (!dev->header_ops || !dev->header_ops->parse_protocol) return 0; return dev->header_ops->parse_protocol(skb);}
/* ll_header must have at least hard_header_len allocated */static inline bool dev_validate_header(const struct net_device *dev, char *ll_header, int len){ if (likely(len >= dev->hard_header_len)) return true; if (len < dev->min_header_len) return false;
if (dev->header_ops && dev->header_ops->validate) return dev->header_ops->validate(ll_header, len);
return false;}
static inline bool dev_has_header(const struct net_device *dev){ return dev->header_ops && dev->header_ops->create;}
struct numa_drop_counters { atomic_t drops0 ____cacheline_aligned_in_smp; atomic_t drops1 ____cacheline_aligned_in_smp;};
static inline int numa_drop_read(const struct numa_drop_counters *ndc){ return atomic_read(&ndc->drops0) + atomic_read(&ndc->drops1);}
static inline void numa_drop_add(struct numa_drop_counters *ndc, int val){ int n = numa_node_id() % 2;
if (n) atomic_add(val, &ndc->drops1); else atomic_add(val, &ndc->drops0);}
static inline void numa_drop_reset(struct numa_drop_counters *ndc){ atomic_set(&ndc->drops0, 0); atomic_set(&ndc->drops1, 0);}
/* * Incoming packets are placed on per-CPU queues */struct softnet_data { struct list_head poll_list; struct sk_buff_head process_queue; local_lock_t process_queue_bh_lock;
/* stats */ unsigned int processed; unsigned int time_squeeze;#ifdef CONFIG_RPS struct softnet_data *rps_ipi_list;#endif
unsigned int received_rps; bool in_net_rx_action; bool in_napi_threaded_poll;
#ifdef CONFIG_NET_FLOW_LIMIT struct sd_flow_limit __rcu *flow_limit;#endif struct Qdisc *output_queue; struct Qdisc **output_queue_tailp; struct sk_buff *completion_queue;#ifdef CONFIG_XFRM_OFFLOAD struct sk_buff_head xfrm_backlog;#endif /* written and read only by owning cpu: */ struct netdev_xmit xmit;#ifdef CONFIG_RPS /* input_queue_head should be written by cpu owning this struct, * and only read by other cpus. Worth using a cache line. */ unsigned int input_queue_head ____cacheline_aligned_in_smp;
/* Elements below can be accessed between CPUs for RPS/RFS */ call_single_data_t csd ____cacheline_aligned_in_smp; struct softnet_data *rps_ipi_next; unsigned int cpu;
/* We force a cacheline alignment from here, to hold together * input_queue_tail, input_pkt_queue and backlog.state. * We add holes so that backlog.state is the last field * of this cache line. */ long pad[3] ____cacheline_aligned_in_smp; unsigned int input_queue_tail;#endif struct sk_buff_head input_pkt_queue;
struct napi_struct backlog;
struct numa_drop_counters drop_counters;
int defer_ipi_scheduled ____cacheline_aligned_in_smp; call_single_data_t defer_csd;};
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
struct page_pool_bh { struct page_pool *pool; local_lock_t bh_lock;};DECLARE_PER_CPU(struct page_pool_bh, system_page_pool);
#define XMIT_RECURSION_LIMIT 8
#ifndef CONFIG_PREEMPT_RTstatic inline int dev_recursion_level(void){ return this_cpu_read(softnet_data.xmit.recursion);}
static inline bool dev_xmit_recursion(void){ return unlikely(__this_cpu_read(softnet_data.xmit.recursion) > XMIT_RECURSION_LIMIT);}
static inline void dev_xmit_recursion_inc(void){ __this_cpu_inc(softnet_data.xmit.recursion);}
static inline void dev_xmit_recursion_dec(void){ __this_cpu_dec(softnet_data.xmit.recursion);}#elsestatic inline int dev_recursion_level(void){ return current->net_xmit.recursion;}
static inline bool dev_xmit_recursion(void){ return unlikely(current->net_xmit.recursion > XMIT_RECURSION_LIMIT);}
static inline void dev_xmit_recursion_inc(void){ current->net_xmit.recursion++;}
static inline void dev_xmit_recursion_dec(void){ current->net_xmit.recursion--;}#endif
void __netif_schedule(struct Qdisc *q);void netif_schedule_queue(struct netdev_queue *txq);
static inline void netif_tx_schedule_all(struct net_device *dev){ unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) netif_schedule_queue(netdev_get_tx_queue(dev, i));}
static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue){ clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);}
/** * netif_start_queue - allow transmit * @dev: network device * * Allow upper layers to call the device hard_start_xmit routine. */static inline void netif_start_queue(struct net_device *dev){ netif_tx_start_queue(netdev_get_tx_queue(dev, 0));}
static inline void netif_tx_start_all_queues(struct net_device *dev){ unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) { struct netdev_queue *txq = netdev_get_tx_queue(dev, i); netif_tx_start_queue(txq); }}
void netif_tx_wake_queue(struct netdev_queue *dev_queue);
/** * netif_wake_queue - restart transmit * @dev: network device * * Allow upper layers to call the device hard_start_xmit routine. * Used for flow control when transmit resources are available. */static inline void netif_wake_queue(struct net_device *dev){ netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));}
static inline void netif_tx_wake_all_queues(struct net_device *dev){ unsigned int i;
for (i = 0; i < dev->num_tx_queues; i++) { struct netdev_queue *txq = netdev_get_tx_queue(dev, i); netif_tx_wake_queue(txq); }}
static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue){ /* Paired with READ_ONCE() from dev_watchdog() */ WRITE_ONCE(dev_queue->trans_start, jiffies);
/* This barrier is paired with smp_mb() from dev_watchdog() */ smp_mb__before_atomic();
/* Must be an atomic op see netif_txq_try_stop() */ set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);}
/** * netif_stop_queue - stop transmitted packets * @dev: network device * * Stop upper layers calling the device hard_start_xmit routine. * Used for flow control when transmit resources are unavailable. */static inline void netif_stop_queue(struct net_device *dev){ netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));}
void netif_tx_stop_all_queues(struct net_device *dev);
static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue){ return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);}
/** * netif_queue_stopped - test if transmit queue is flowblocked * @dev: network device * * Test if transmit queue on device is currently unable to send. */static inline bool netif_queue_stopped(const struct net_device *dev){ return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));}
static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue){ return dev_queue->state & QUEUE_STATE_ANY_XOFF;}
static inline boolnetif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue){ return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;}
static inline boolnetif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue){ return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;}
/** * netdev_queue_set_dql_min_limit - set dql minimum limit * @dev_queue: pointer to transmit queue * @min_limit: dql minimum limit * * Forces xmit_more() to return true until the minimum threshold * defined by @min_limit is reached (or until the tx queue is * empty). Warning: to be use with care, misuse will impact the * latency. */static inline void netdev_queue_set_dql_min_limit(struct netdev_queue *dev_queue, unsigned int min_limit){#ifdef CONFIG_BQL dev_queue->dql.min_limit = min_limit;#endif}
static inline int netdev_queue_dql_avail(const struct netdev_queue *txq){#ifdef CONFIG_BQL /* Non-BQL migrated drivers will return 0, too. */ return dql_avail(&txq->dql);#else return 0;#endif}
/** * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write * @dev_queue: pointer to transmit queue * * BQL enabled drivers might use this helper in their ndo_start_xmit(), * to give appropriate hint to the CPU. */static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue){#ifdef CONFIG_BQL prefetchw(&dev_queue->dql.num_queued);#endif}
/** * netdev_txq_bql_complete_prefetchw - prefetch bql data for write * @dev_queue: pointer to transmit queue * * BQL enabled drivers might use this helper in their TX completion path, * to give appropriate hint to the CPU. */static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue){#ifdef CONFIG_BQL prefetchw(&dev_queue->dql.limit);#endif}
/** * netdev_tx_sent_queue - report the number of bytes queued to a given tx queue * @dev_queue: network device queue * @bytes: number of bytes queued to the device queue * * Report the number of bytes queued for sending/completion to the network * device hardware queue. @bytes should be a good approximation and should * exactly match netdev_completed_queue() @bytes. * This is typically called once per packet, from ndo_start_xmit(). */static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, unsigned int bytes){#ifdef CONFIG_BQL dql_queued(&dev_queue->dql, bytes);
if (likely(dql_avail(&dev_queue->dql) >= 0)) return;
/* Paired with READ_ONCE() from dev_watchdog() */ WRITE_ONCE(dev_queue->trans_start, jiffies);
/* This barrier is paired with smp_mb() from dev_watchdog() */ smp_mb__before_atomic();
set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
/* * The XOFF flag must be set before checking the dql_avail below, * because in netdev_tx_completed_queue we update the dql_completed * before checking the XOFF flag. */ smp_mb__after_atomic();
/* check again in case another CPU has just made room avail */ if (unlikely(dql_avail(&dev_queue->dql) >= 0)) clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);#endif}
/* Variant of netdev_tx_sent_queue() for drivers that are aware * that they should not test BQL status themselves. * We do want to change __QUEUE_STATE_STACK_XOFF only for the last * skb of a batch. * Returns true if the doorbell must be used to kick the NIC. */static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue, unsigned int bytes, bool xmit_more){ if (xmit_more) {#ifdef CONFIG_BQL dql_queued(&dev_queue->dql, bytes);#endif return netif_tx_queue_stopped(dev_queue); } netdev_tx_sent_queue(dev_queue, bytes); return true;}
/** * netdev_sent_queue - report the number of bytes queued to hardware * @dev: network device * @bytes: number of bytes queued to the hardware device queue * * Report the number of bytes queued for sending/completion to the network * device hardware queue#0. @bytes should be a good approximation and should * exactly match netdev_completed_queue() @bytes. * This is typically called once per packet, from ndo_start_xmit(). */static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes){ netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);}
static inline bool __netdev_sent_queue(struct net_device *dev, unsigned int bytes, bool xmit_more){ return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes, xmit_more);}
/** * netdev_tx_completed_queue - report number of packets/bytes at TX completion. * @dev_queue: network device queue * @pkts: number of packets (currently ignored) * @bytes: number of bytes dequeued from the device queue * * Must be called at most once per TX completion round (and not per * individual packet), so that BQL can adjust its limits appropriately. */static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, unsigned int pkts, unsigned int bytes){#ifdef CONFIG_BQL if (unlikely(!bytes)) return;
dql_completed(&dev_queue->dql, bytes);
/* * Without the memory barrier there is a small possibility that * netdev_tx_sent_queue will miss the update and cause the queue to * be stopped forever */ smp_mb(); /* NOTE: netdev_txq_completed_mb() assumes this exists */
if (unlikely(dql_avail(&dev_queue->dql) < 0)) return;
if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) netif_schedule_queue(dev_queue);#endif}
/** * netdev_completed_queue - report bytes and packets completed by device * @dev: network device * @pkts: actual number of packets sent over the medium * @bytes: actual number of bytes sent over the medium * * Report the number of bytes and packets transmitted by the network device * hardware queue over the physical medium, @bytes must exactly match the * @bytes amount passed to netdev_sent_queue() */static inline void netdev_completed_queue(struct net_device *dev, unsigned int pkts, unsigned int bytes){ netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);}
static inline void netdev_tx_reset_queue(struct netdev_queue *q){#ifdef CONFIG_BQL clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); dql_reset(&q->dql);#endif}
/** * netdev_tx_reset_subqueue - reset the BQL stats and state of a netdev queue * @dev: network device * @qid: stack index of the queue to reset */static inline void netdev_tx_reset_subqueue(const struct net_device *dev, u32 qid){ netdev_tx_reset_queue(netdev_get_tx_queue(dev, qid));}
/** * netdev_reset_queue - reset the packets and bytes count of a network device * @dev_queue: network device * * Reset the bytes and packet count of a network device and clear the * software flow control OFF bit for this network device */static inline void netdev_reset_queue(struct net_device *dev_queue){ netdev_tx_reset_subqueue(dev_queue, 0);}
/** * netdev_cap_txqueue - check if selected tx queue exceeds device queues * @dev: network device * @queue_index: given tx queue index * * Returns 0 if given tx queue index >= number of device tx queues, * otherwise returns the originally passed tx queue index. */static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index){ if (unlikely(queue_index >= dev->real_num_tx_queues)) { net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", dev->name, queue_index, dev->real_num_tx_queues); return 0; }
return queue_index;}
/** * netif_running - test if up * @dev: network device * * Test if the device has been brought up. */static inline bool netif_running(const struct net_device *dev){ return test_bit(__LINK_STATE_START, &dev->state);}
/* * Routines to manage the subqueues on a device. We only need start, * stop, and a check if it's stopped. All other device management is * done at the overall netdevice level. * Also test the device if we're multiqueue. */
/** * netif_start_subqueue - allow sending packets on subqueue * @dev: network device * @queue_index: sub queue index * * Start individual transmit queue of a device with multiple transmit queues. */static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index){ struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
netif_tx_start_queue(txq);}
/** * netif_stop_subqueue - stop sending packets on subqueue * @dev: network device * @queue_index: sub queue index * * Stop individual transmit queue of a device with multiple transmit queues. */static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index){ struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); netif_tx_stop_queue(txq);}
/** * __netif_subqueue_stopped - test status of subqueue * @dev: network device * @queue_index: sub queue index * * Check individual transmit queue of a device with multiple transmit queues. */static inline bool __netif_subqueue_stopped(const struct net_device *dev, u16 queue_index){ struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
return netif_tx_queue_stopped(txq);}
/** * netif_subqueue_stopped - test status of subqueue * @dev: network device * @skb: sub queue buffer pointer * * Check individual transmit queue of a device with multiple transmit queues. */static inline bool netif_subqueue_stopped(const struct net_device *dev, struct sk_buff *skb){ return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));}
/** * netif_wake_subqueue - allow sending packets on subqueue * @dev: network device * @queue_index: sub queue index * * Resume individual transmit queue of a device with multiple transmit queues. */static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index){ struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
netif_tx_wake_queue(txq);}
#ifdef CONFIG_XPSint netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, u16 index);int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask, u16 index, enum xps_map_type type);
/** * netif_attr_test_mask - Test a CPU or Rx queue set in a mask * @j: CPU/Rx queue index * @mask: bitmask of all cpus/rx queues * @nr_bits: number of bits in the bitmask * * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues. */static inline bool netif_attr_test_mask(unsigned long j, const unsigned long *mask, unsigned int nr_bits){ cpu_max_bits_warn(j, nr_bits); return test_bit(j, mask);}
/** * netif_attr_test_online - Test for online CPU/Rx queue * @j: CPU/Rx queue index * @online_mask: bitmask for CPUs/Rx queues that are online * @nr_bits: number of bits in the bitmask * * Returns: true if a CPU/Rx queue is online. */static inline bool netif_attr_test_online(unsigned long j, const unsigned long *online_mask, unsigned int nr_bits){ cpu_max_bits_warn(j, nr_bits);
if (online_mask) return test_bit(j, online_mask);
return (j < nr_bits);}
/** * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask * @n: CPU/Rx queue index * @srcp: the cpumask/Rx queue mask pointer * @nr_bits: number of bits in the bitmask * * Returns: next (after n) CPU/Rx queue index in the mask; * >= nr_bits if no further CPUs/Rx queues set. */static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp, unsigned int nr_bits){ /* -1 is a legal arg here. */ if (n != -1) cpu_max_bits_warn(n, nr_bits);
if (srcp) return find_next_bit(srcp, nr_bits, n + 1);
return n + 1;}
/** * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p * @n: CPU/Rx queue index * @src1p: the first CPUs/Rx queues mask pointer * @src2p: the second CPUs/Rx queues mask pointer * @nr_bits: number of bits in the bitmask * * Returns: next (after n) CPU/Rx queue index set in both masks; * >= nr_bits if no further CPUs/Rx queues set in both. */static inline int netif_attrmask_next_and(int n, const unsigned long *src1p, const unsigned long *src2p, unsigned int nr_bits){ /* -1 is a legal arg here. */ if (n != -1) cpu_max_bits_warn(n, nr_bits);
if (src1p && src2p) return find_next_and_bit(src1p, src2p, nr_bits, n + 1); else if (src1p) return find_next_bit(src1p, nr_bits, n + 1); else if (src2p) return find_next_bit(src2p, nr_bits, n + 1);
return n + 1;}#elsestatic inline int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, u16 index){ return 0;}
static inline int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask, u16 index, enum xps_map_type type){ return 0;}#endif
/** * netif_is_multiqueue - test if device has multiple transmit queues * @dev: network device * * Check if device has multiple transmit queues */static inline bool netif_is_multiqueue(const struct net_device *dev){ return dev->num_tx_queues > 1;}
int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);int netif_set_real_num_queues(struct net_device *dev, unsigned int txq, unsigned int rxq);
int netif_get_num_default_rss_queues(void);
void dev_kfree_skb_irq_reason(struct sk_buff *skb, enum skb_drop_reason reason);void dev_kfree_skb_any_reason(struct sk_buff *skb, enum skb_drop_reason reason);
/* * It is not allowed to call kfree_skb() or consume_skb() from hardware * interrupt context or with hardware interrupts being disabled. * (in_hardirq() || irqs_disabled()) * * We provide four helpers that can be used in following contexts : * * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, * replacing kfree_skb(skb) * * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. * Typically used in place of consume_skb(skb) in TX completion path * * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, * replacing kfree_skb(skb) * * dev_consume_skb_any(skb) when caller doesn't know its current irq context, * and consumed a packet. Used in place of consume_skb(skb) */static inline void dev_kfree_skb_irq(struct sk_buff *skb){ dev_kfree_skb_irq_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED);}
static inline void dev_consume_skb_irq(struct sk_buff *skb){ dev_kfree_skb_irq_reason(skb, SKB_CONSUMED);}
static inline void dev_kfree_skb_any(struct sk_buff *skb){ dev_kfree_skb_any_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED);}
static inline void dev_consume_skb_any(struct sk_buff *skb){ dev_kfree_skb_any_reason(skb, SKB_CONSUMED);}
u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp, const struct bpf_prog *xdp_prog);void generic_xdp_tx(struct sk_buff *skb, const struct bpf_prog *xdp_prog);int do_xdp_generic(const struct bpf_prog *xdp_prog, struct sk_buff **pskb);int netif_rx(struct sk_buff *skb);int __netif_rx(struct sk_buff *skb);
int netif_receive_skb(struct sk_buff *skb);int netif_receive_skb_core(struct sk_buff *skb);void netif_receive_skb_list_internal(struct list_head *head);void netif_receive_skb_list(struct list_head *head);gro_result_t gro_receive_skb(struct gro_node *gro, struct sk_buff *skb);
static inline gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb){ return gro_receive_skb(&napi->gro, skb);}
struct sk_buff *napi_get_frags(struct napi_struct *napi);gro_result_t napi_gro_frags(struct napi_struct *napi);
static inline void napi_free_frags(struct napi_struct *napi){ kfree_skb(napi->skb); napi->skb = NULL;}
bool netdev_is_rx_handler_busy(struct net_device *dev);int netdev_rx_handler_register(struct net_device *dev, rx_handler_func_t *rx_handler, void *rx_handler_data);void netdev_rx_handler_unregister(struct net_device *dev);
bool dev_valid_name(const char *name);static inline bool is_socket_ioctl_cmd(unsigned int cmd){ return _IOC_TYPE(cmd) == SOCK_IOC_TYPE;}int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg);int put_user_ifreq(struct ifreq *ifr, void __user *arg);int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, void __user *data, bool *need_copyout);int dev_ifconf(struct net *net, struct ifconf __user *ifc);int dev_eth_ioctl(struct net_device *dev, struct ifreq *ifr, unsigned int cmd);int generic_hwtstamp_get_lower(struct net_device *dev, struct kernel_hwtstamp_config *kernel_cfg);int generic_hwtstamp_set_lower(struct net_device *dev, struct kernel_hwtstamp_config *kernel_cfg, struct netlink_ext_ack *extack);int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *userdata);unsigned int netif_get_flags(const struct net_device *dev);int __dev_change_flags(struct net_device *dev, unsigned int flags, struct netlink_ext_ack *extack);int netif_change_flags(struct net_device *dev, unsigned int flags, struct netlink_ext_ack *extack);int dev_change_flags(struct net_device *dev, unsigned int flags, struct netlink_ext_ack *extack);int netif_set_alias(struct net_device *dev, const char *alias, size_t len);int dev_set_alias(struct net_device *, const char *, size_t);int dev_get_alias(const struct net_device *, char *, size_t);int __dev_change_net_namespace(struct net_device *dev, struct net *net, const char *pat, int new_ifindex, struct netlink_ext_ack *extack);int dev_change_net_namespace(struct net_device *dev, struct net *net, const char *pat);int __netif_set_mtu(struct net_device *dev, int new_mtu);int netif_set_mtu(struct net_device *dev, int new_mtu);int dev_set_mtu(struct net_device *, int);int netif_pre_changeaddr_notify(struct net_device *dev, const char *addr, struct netlink_ext_ack *extack);int netif_set_mac_address(struct net_device *dev, struct sockaddr_storage *ss, struct netlink_ext_ack *extack);int dev_set_mac_address(struct net_device *dev, struct sockaddr_storage *ss, struct netlink_ext_ack *extack);int dev_set_mac_address_user(struct net_device *dev, struct sockaddr_storage *ss, struct netlink_ext_ack *extack);int netif_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name);int netif_get_port_parent_id(struct net_device *dev, struct netdev_phys_item_id *ppid, bool recurse);bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, struct netdev_queue *txq, int *ret);
int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);u8 dev_xdp_prog_count(struct net_device *dev);int netif_xdp_propagate(struct net_device *dev, struct netdev_bpf *bpf);int dev_xdp_propagate(struct net_device *dev, struct netdev_bpf *bpf);u8 dev_xdp_sb_prog_count(struct net_device *dev);u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode);
u32 dev_get_min_mp_channel_count(const struct net_device *dev);
int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb);bool is_skb_forwardable(const struct net_device *dev, const struct sk_buff *skb);
static __always_inline bool __is_skb_forwardable(const struct net_device *dev, const struct sk_buff *skb, const bool check_mtu){ const u32 vlan_hdr_len = 4; /* VLAN_HLEN */ unsigned int len;
if (!(dev->flags & IFF_UP)) return false;
if (!check_mtu) return true;
len = dev->mtu + dev->hard_header_len + vlan_hdr_len; if (skb->len <= len) return true;
/* if TSO is enabled, we don't care about the length as the packet * could be forwarded without being segmented before */ if (skb_is_gso(skb)) return true;
return false;}
void netdev_core_stats_inc(struct net_device *dev, u32 offset);
#define DEV_CORE_STATS_INC(FIELD) \static inline void dev_core_stats_##FIELD##_inc(struct net_device *dev) \{ \ netdev_core_stats_inc(dev, \ offsetof(struct net_device_core_stats, FIELD)); \}DEV_CORE_STATS_INC(rx_dropped)DEV_CORE_STATS_INC(tx_dropped)DEV_CORE_STATS_INC(rx_nohandler)DEV_CORE_STATS_INC(rx_otherhost_dropped)#undef DEV_CORE_STATS_INC
static __always_inline int ____dev_forward_skb(struct net_device *dev, struct sk_buff *skb, const bool check_mtu){ if (skb_orphan_frags(skb, GFP_ATOMIC) || unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) { dev_core_stats_rx_dropped_inc(dev); kfree_skb(skb); return NET_RX_DROP; }
skb_scrub_packet(skb, !net_eq(dev_net(dev), dev_net(skb->dev))); skb->priority = 0; return 0;}
bool dev_nit_active_rcu(const struct net_device *dev);static inline bool dev_nit_active(const struct net_device *dev){ bool ret;
rcu_read_lock(); ret = dev_nit_active_rcu(dev); rcu_read_unlock(); return ret;}
void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
static inline void __dev_put(struct net_device *dev){ if (dev) {#ifdef CONFIG_PCPU_DEV_REFCNT this_cpu_dec(*dev->pcpu_refcnt);#else refcount_dec(&dev->dev_refcnt);#endif }}
static inline void __dev_hold(struct net_device *dev){ if (dev) {#ifdef CONFIG_PCPU_DEV_REFCNT this_cpu_inc(*dev->pcpu_refcnt);#else refcount_inc(&dev->dev_refcnt);#endif }}
static inline void __netdev_tracker_alloc(struct net_device *dev, netdevice_tracker *tracker, gfp_t gfp){#ifdef CONFIG_NET_DEV_REFCNT_TRACKER ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp);#endif}
/* netdev_tracker_alloc() can upgrade a prior untracked reference * taken by dev_get_by_name()/dev_get_by_index() to a tracked one. */static inline void netdev_tracker_alloc(struct net_device *dev, netdevice_tracker *tracker, gfp_t gfp){#ifdef CONFIG_NET_DEV_REFCNT_TRACKER refcount_dec(&dev->refcnt_tracker.no_tracker); __netdev_tracker_alloc(dev, tracker, gfp);#endif}
static inline void netdev_tracker_free(struct net_device *dev, netdevice_tracker *tracker){#ifdef CONFIG_NET_DEV_REFCNT_TRACKER ref_tracker_free(&dev->refcnt_tracker, tracker);#endif}
static inline void netdev_hold(struct net_device *dev, netdevice_tracker *tracker, gfp_t gfp){ if (dev) { __dev_hold(dev); __netdev_tracker_alloc(dev, tracker, gfp); }}
static inline void netdev_put(struct net_device *dev, netdevice_tracker *tracker){ if (dev) { netdev_tracker_free(dev, tracker); __dev_put(dev); }}
/** * dev_hold - get reference to device * @dev: network device * * Hold reference to device to keep it from being freed. * Try using netdev_hold() instead. */static inline void dev_hold(struct net_device *dev){ netdev_hold(dev, NULL, GFP_ATOMIC);}
/** * dev_put - release reference to device * @dev: network device * * Release reference to device to allow it to be freed. * Try using netdev_put() instead. */static inline void dev_put(struct net_device *dev){ netdev_put(dev, NULL);}
DEFINE_FREE(dev_put, struct net_device *, if (_T) dev_put(_T))
static inline void netdev_ref_replace(struct net_device *odev, struct net_device *ndev, netdevice_tracker *tracker, gfp_t gfp){ if (odev) netdev_tracker_free(odev, tracker);
__dev_hold(ndev); __dev_put(odev);
if (ndev) __netdev_tracker_alloc(ndev, tracker, gfp);}
/* Carrier loss detection, dial on demand. The functions netif_carrier_on * and _off may be called from IRQ context, but it is caller * who is responsible for serialization of these calls. * * The name carrier is inappropriate, these functions should really be * called netif_lowerlayer_*() because they represent the state of any * kind of lower layer not just hardware media. */void linkwatch_fire_event(struct net_device *dev);
/** * linkwatch_sync_dev - sync linkwatch for the given device * @dev: network device to sync linkwatch for * * Sync linkwatch for the given device, removing it from the * pending work list (if queued). */void linkwatch_sync_dev(struct net_device *dev);void __linkwatch_sync_dev(struct net_device *dev);
/** * netif_carrier_ok - test if carrier present * @dev: network device * * Check if carrier is present on device */static inline bool netif_carrier_ok(const struct net_device *dev){ return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);}
unsigned long dev_trans_start(struct net_device *dev);
void netdev_watchdog_up(struct net_device *dev);
void netif_carrier_on(struct net_device *dev);void netif_carrier_off(struct net_device *dev);void netif_carrier_event(struct net_device *dev);
/** * netif_dormant_on - mark device as dormant. * @dev: network device * * Mark device as dormant (as per RFC2863). * * The dormant state indicates that the relevant interface is not * actually in a condition to pass packets (i.e., it is not 'up') but is * in a "pending" state, waiting for some external event. For "on- * demand" interfaces, this new state identifies the situation where the * interface is waiting for events to place it in the up state. */static inline void netif_dormant_on(struct net_device *dev){ if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) linkwatch_fire_event(dev);}
/** * netif_dormant_off - set device as not dormant. * @dev: network device * * Device is not in dormant state. */static inline void netif_dormant_off(struct net_device *dev){ if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) linkwatch_fire_event(dev);}
/** * netif_dormant - test if device is dormant * @dev: network device * * Check if device is dormant. */static inline bool netif_dormant(const struct net_device *dev){ return test_bit(__LINK_STATE_DORMANT, &dev->state);}
/** * netif_testing_on - mark device as under test. * @dev: network device * * Mark device as under test (as per RFC2863). * * The testing state indicates that some test(s) must be performed on * the interface. After completion, of the test, the interface state * will change to up, dormant, or down, as appropriate. */static inline void netif_testing_on(struct net_device *dev){ if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state)) linkwatch_fire_event(dev);}
/** * netif_testing_off - set device as not under test. * @dev: network device * * Device is not in testing state. */static inline void netif_testing_off(struct net_device *dev){ if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state)) linkwatch_fire_event(dev);}
/** * netif_testing - test if device is under test * @dev: network device * * Check if device is under test */static inline bool netif_testing(const struct net_device *dev){ return test_bit(__LINK_STATE_TESTING, &dev->state);}
/** * netif_oper_up - test if device is operational * @dev: network device * * Check if carrier is operational */static inline bool netif_oper_up(const struct net_device *dev){ unsigned int operstate = READ_ONCE(dev->operstate);
return operstate == IF_OPER_UP || operstate == IF_OPER_UNKNOWN /* backward compat */;}
/** * netif_device_present - is device available or removed * @dev: network device * * Check if device has not been removed from system. */static inline bool netif_device_present(const struct net_device *dev){ return test_bit(__LINK_STATE_PRESENT, &dev->state);}
void netif_device_detach(struct net_device *dev);
void netif_device_attach(struct net_device *dev);
/* * Network interface message level settings */
enum { NETIF_MSG_DRV_BIT, NETIF_MSG_PROBE_BIT, NETIF_MSG_LINK_BIT, NETIF_MSG_TIMER_BIT, NETIF_MSG_IFDOWN_BIT, NETIF_MSG_IFUP_BIT, NETIF_MSG_RX_ERR_BIT, NETIF_MSG_TX_ERR_BIT, NETIF_MSG_TX_QUEUED_BIT, NETIF_MSG_INTR_BIT, NETIF_MSG_TX_DONE_BIT, NETIF_MSG_RX_STATUS_BIT, NETIF_MSG_PKTDATA_BIT, NETIF_MSG_HW_BIT, NETIF_MSG_WOL_BIT,
/* When you add a new bit above, update netif_msg_class_names array * in net/ethtool/common.c */ NETIF_MSG_CLASS_COUNT,};/* Both ethtool_ops interface and internal driver implementation use u32 */static_assert(NETIF_MSG_CLASS_COUNT <= 32);
#define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))#define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)
#define NETIF_MSG_DRV __NETIF_MSG(DRV)#define NETIF_MSG_PROBE __NETIF_MSG(PROBE)#define NETIF_MSG_LINK __NETIF_MSG(LINK)#define NETIF_MSG_TIMER __NETIF_MSG(TIMER)#define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)#define NETIF_MSG_IFUP __NETIF_MSG(IFUP)#define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)#define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)#define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)#define NETIF_MSG_INTR __NETIF_MSG(INTR)#define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)#define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)#define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)#define NETIF_MSG_HW __NETIF_MSG(HW)#define NETIF_MSG_WOL __NETIF_MSG(WOL)
#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits){ /* use default */ if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) return default_msg_enable_bits; if (debug_value == 0) /* no output */ return 0; /* set low N bits */ return (1U << debug_value) - 1;}
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu){ spin_lock(&txq->_xmit_lock); /* Pairs with READ_ONCE() in netif_tx_owned() */ WRITE_ONCE(txq->xmit_lock_owner, cpu);}
static inline bool __netif_tx_acquire(struct netdev_queue *txq){ __acquire(&txq->_xmit_lock); return true;}
static inline void __netif_tx_release(struct netdev_queue *txq){ __release(&txq->_xmit_lock);}
static inline void __netif_tx_lock_bh(struct netdev_queue *txq){ spin_lock_bh(&txq->_xmit_lock); /* Pairs with READ_ONCE() in netif_tx_owned() */ WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id());}
static inline bool __netif_tx_trylock(struct netdev_queue *txq){ bool ok = spin_trylock(&txq->_xmit_lock);
if (likely(ok)) { /* Pairs with READ_ONCE() in netif_tx_owned() */ WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id()); } return ok;}
static inline void __netif_tx_unlock(struct netdev_queue *txq){ /* Pairs with READ_ONCE() in netif_tx_owned() */ WRITE_ONCE(txq->xmit_lock_owner, -1); spin_unlock(&txq->_xmit_lock);}
static inline void __netif_tx_unlock_bh(struct netdev_queue *txq){ /* Pairs with READ_ONCE() in netif_tx_owned() */ WRITE_ONCE(txq->xmit_lock_owner, -1); spin_unlock_bh(&txq->_xmit_lock);}
/* * txq->trans_start can be read locklessly from dev_watchdog() */static inline void txq_trans_update(const struct net_device *dev, struct netdev_queue *txq){ if (!dev->lltx) WRITE_ONCE(txq->trans_start, jiffies);}
static inline void txq_trans_cond_update(struct netdev_queue *txq){ unsigned long now = jiffies;
if (READ_ONCE(txq->trans_start) != now) WRITE_ONCE(txq->trans_start, now);}
/* legacy drivers only, netdev_start_xmit() sets txq->trans_start */static inline void netif_trans_update(struct net_device *dev){ struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
txq_trans_cond_update(txq);}
/** * netif_tx_lock - grab network device transmit lock * @dev: network device * * Get network device transmit lock */void netif_tx_lock(struct net_device *dev);
static inline void netif_tx_lock_bh(struct net_device *dev){ local_bh_disable(); netif_tx_lock(dev);}
void netif_tx_unlock(struct net_device *dev);
static inline void netif_tx_unlock_bh(struct net_device *dev){ netif_tx_unlock(dev); local_bh_enable();}
#define HARD_TX_LOCK(dev, txq, cpu) { \ if (!(dev)->lltx) { \ __netif_tx_lock(txq, cpu); \ } else { \ __netif_tx_acquire(txq); \ } \}
#define HARD_TX_TRYLOCK(dev, txq) \ (!(dev)->lltx ? \ __netif_tx_trylock(txq) : \ __netif_tx_acquire(txq))
#define HARD_TX_UNLOCK(dev, txq) { \ if (!(dev)->lltx) { \ __netif_tx_unlock(txq); \ } else { \ __netif_tx_release(txq); \ } \}
static inline void netif_tx_disable(struct net_device *dev){ unsigned int i; int cpu;
local_bh_disable(); cpu = smp_processor_id(); spin_lock(&dev->tx_global_lock); for (i = 0; i < dev->num_tx_queues; i++) { struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
__netif_tx_lock(txq, cpu); netif_tx_stop_queue(txq); __netif_tx_unlock(txq); } spin_unlock(&dev->tx_global_lock); local_bh_enable();}
#ifndef CONFIG_PREEMPT_RTstatic inline bool netif_tx_owned(struct netdev_queue *txq, unsigned int cpu){ /* Other cpus might concurrently change txq->xmit_lock_owner * to -1 or to their cpu id, but not to our id. */ return READ_ONCE(txq->xmit_lock_owner) == cpu;}
#elsestatic inline bool netif_tx_owned(struct netdev_queue *txq, unsigned int cpu){ return rt_mutex_owner(&txq->_xmit_lock.lock) == current;}
#endif
static inline void netif_addr_lock(struct net_device *dev){ unsigned char nest_level = 0;
#ifdef CONFIG_LOCKDEP nest_level = dev->nested_level;#endif spin_lock_nested(&dev->addr_list_lock, nest_level);}
static inline void netif_addr_lock_bh(struct net_device *dev){ unsigned char nest_level = 0;
#ifdef CONFIG_LOCKDEP nest_level = dev->nested_level;#endif local_bh_disable(); spin_lock_nested(&dev->addr_list_lock, nest_level);}
static inline void netif_addr_unlock(struct net_device *dev){ spin_unlock(&dev->addr_list_lock);}
static inline void netif_addr_unlock_bh(struct net_device *dev){ spin_unlock_bh(&dev->addr_list_lock);}
/* * dev_addrs walker. Should be used only for read access. Call with * rcu_read_lock held. */#define for_each_dev_addr(dev, ha) \ list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
/* These functions live elsewhere (drivers/net/net_init.c, but related) */
void ether_setup(struct net_device *dev);
/* Allocate dummy net_device */struct net_device *alloc_netdev_dummy(int sizeof_priv);
/* Support for loadable net-drivers */struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, unsigned char name_assign_type, void (*setup)(struct net_device *), unsigned int txqs, unsigned int rxqs);#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
#define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ count)
int register_netdev(struct net_device *dev);void unregister_netdev(struct net_device *dev);
int devm_register_netdev(struct device *dev, struct net_device *ndev);
/* General hardware address lists handling functions */int __hw_addr_sync(struct netdev_hw_addr_list *to_list, struct netdev_hw_addr_list *from_list, int addr_len);int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list, struct netdev_hw_addr_list *from_list, int addr_len);void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, struct netdev_hw_addr_list *from_list, int addr_len);int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, struct net_device *dev, int (*sync)(struct net_device *, const unsigned char *), int (*unsync)(struct net_device *, const unsigned char *));int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list, struct net_device *dev, int (*sync)(struct net_device *, const unsigned char *, int), int (*unsync)(struct net_device *, const unsigned char *, int));void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list, struct net_device *dev, int (*unsync)(struct net_device *, const unsigned char *, int));void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, struct net_device *dev, int (*unsync)(struct net_device *, const unsigned char *));void __hw_addr_init(struct netdev_hw_addr_list *list);void __hw_addr_flush(struct netdev_hw_addr_list *list);int __hw_addr_list_snapshot(struct netdev_hw_addr_list *snap, const struct netdev_hw_addr_list *list, int addr_len, struct netdev_hw_addr_list *cache);void __hw_addr_list_reconcile(struct netdev_hw_addr_list *real_list, struct netdev_hw_addr_list *work, struct netdev_hw_addr_list *ref, int addr_len, struct netdev_hw_addr_list *cache);
/* Functions used for device addresses handling */void dev_addr_mod(struct net_device *dev, unsigned int offset, const void *addr, size_t len);
static inline void__dev_addr_set(struct net_device *dev, const void *addr, size_t len){ dev_addr_mod(dev, 0, addr, len);}
static inline void dev_addr_set(struct net_device *dev, const u8 *addr){ __dev_addr_set(dev, addr, dev->addr_len);}
int dev_addr_add(struct net_device *dev, const unsigned char *addr, unsigned char addr_type);int dev_addr_del(struct net_device *dev, const unsigned char *addr, unsigned char addr_type);
/* Functions used for unicast addresses handling */int dev_uc_add(struct net_device *dev, const unsigned char *addr);int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);int dev_uc_del(struct net_device *dev, const unsigned char *addr);int dev_uc_sync(struct net_device *to, struct net_device *from);int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);void dev_uc_unsync(struct net_device *to, struct net_device *from);void dev_uc_flush(struct net_device *dev);void dev_uc_init(struct net_device *dev);
/** * __dev_uc_sync - Synchronize device's unicast list * @dev: device to sync * @sync: function to call if address should be added * @unsync: function to call if address should be removed * * Add newly added addresses to the interface, and release * addresses that have been deleted. */static inline int __dev_uc_sync(struct net_device *dev, int (*sync)(struct net_device *, const unsigned char *), int (*unsync)(struct net_device *, const unsigned char *)){ return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);}
/** * __dev_uc_unsync - Remove synchronized addresses from device * @dev: device to sync * @unsync: function to call if address should be removed * * Remove all addresses that were added to the device by dev_uc_sync(). */static inline void __dev_uc_unsync(struct net_device *dev, int (*unsync)(struct net_device *, const unsigned char *)){ __hw_addr_unsync_dev(&dev->uc, dev, unsync);}
/* Functions used for multicast addresses handling */int dev_mc_add(struct net_device *dev, const unsigned char *addr);int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);int dev_mc_del(struct net_device *dev, const unsigned char *addr);int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);int dev_mc_sync(struct net_device *to, struct net_device *from);int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);void dev_mc_unsync(struct net_device *to, struct net_device *from);void dev_mc_flush(struct net_device *dev);void dev_mc_init(struct net_device *dev);
/** * __dev_mc_sync - Synchronize device's multicast list * @dev: device to sync * @sync: function to call if address should be added * @unsync: function to call if address should be removed * * Add newly added addresses to the interface, and release * addresses that have been deleted. */static inline int __dev_mc_sync(struct net_device *dev, int (*sync)(struct net_device *, const unsigned char *), int (*unsync)(struct net_device *, const unsigned char *)){ return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);}
/** * __dev_mc_unsync - Remove synchronized addresses from device * @dev: device to sync * @unsync: function to call if address should be removed * * Remove all addresses that were added to the device by dev_mc_sync(). */static inline void __dev_mc_unsync(struct net_device *dev, int (*unsync)(struct net_device *, const unsigned char *)){ __hw_addr_unsync_dev(&dev->mc, dev, unsync);}
/* Functions used for secondary unicast and multicast support */void dev_set_rx_mode(struct net_device *dev);void netif_rx_mode_schedule_retry(struct net_device *dev);int netif_set_promiscuity(struct net_device *dev, int inc);int dev_set_promiscuity(struct net_device *dev, int inc);int netif_set_allmulti(struct net_device *dev, int inc, bool notify);int dev_set_allmulti(struct net_device *dev, int inc);void netif_state_change(struct net_device *dev);void netdev_state_change(struct net_device *dev);void __netdev_notify_peers(struct net_device *dev);void netdev_notify_peers(struct net_device *dev);void netdev_features_change(struct net_device *dev);/* Load a device via the kmod */void dev_load(struct net *net, const char *name);struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, struct rtnl_link_stats64 *storage);void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, const struct net_device_stats *netdev_stats);void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s, const struct pcpu_sw_netstats __percpu *netstats);void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s);
void netdev_work_sched(struct net_device *dev, unsigned long events);unsigned long netdev_work_cancel(struct net_device *dev, unsigned long mask);
enum { NESTED_SYNC_IMM_BIT, NESTED_SYNC_TODO_BIT,};
#define __NESTED_SYNC_BIT(bit) ((u32)1 << (bit))#define __NESTED_SYNC(name) __NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT)
#define NESTED_SYNC_IMM __NESTED_SYNC(IMM)#define NESTED_SYNC_TODO __NESTED_SYNC(TODO)
struct netdev_nested_priv { unsigned char flags; void *data;};
bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, struct list_head **iter);
/* iterate through upper list, must be called under RCU read lock */#define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ for (iter = &(dev)->adj_list.upper, \ updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ updev; \ updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
int netdev_walk_all_upper_dev_rcu(struct net_device *dev, int (*fn)(struct net_device *upper_dev, struct netdev_nested_priv *priv), struct netdev_nested_priv *priv);
bool netdev_has_upper_dev_all_rcu(struct net_device *dev, struct net_device *upper_dev);
bool netdev_has_any_upper_dev(struct net_device *dev);
void *netdev_lower_get_next_private(struct net_device *dev, struct list_head **iter);void *netdev_lower_get_next_private_rcu(struct net_device *dev, struct list_head **iter);
#define netdev_for_each_lower_private(dev, priv, iter) \ for (iter = (dev)->adj_list.lower.next, \ priv = netdev_lower_get_next_private(dev, &(iter)); \ priv; \ priv = netdev_lower_get_next_private(dev, &(iter)))
#define netdev_for_each_lower_private_rcu(dev, priv, iter) \ for (iter = &(dev)->adj_list.lower, \ priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ priv; \ priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
void *netdev_lower_get_next(struct net_device *dev, struct list_head **iter);
#define netdev_for_each_lower_dev(dev, ldev, iter) \ for (iter = (dev)->adj_list.lower.next, \ ldev = netdev_lower_get_next(dev, &(iter)); \ ldev; \ ldev = netdev_lower_get_next(dev, &(iter)))
struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev, struct list_head **iter);int netdev_walk_all_lower_dev(struct net_device *dev, int (*fn)(struct net_device *lower_dev, struct netdev_nested_priv *priv), struct netdev_nested_priv *priv);int netdev_walk_all_lower_dev_rcu(struct net_device *dev, int (*fn)(struct net_device *lower_dev, struct netdev_nested_priv *priv), struct netdev_nested_priv *priv);
void *netdev_adjacent_get_private(struct list_head *adj_list);void *netdev_lower_get_first_private_rcu(struct net_device *dev);struct net_device *netdev_master_upper_dev_get(struct net_device *dev);struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev, struct netlink_ext_ack *extack);int netdev_master_upper_dev_link(struct net_device *dev, struct net_device *upper_dev, void *upper_priv, void *upper_info, struct netlink_ext_ack *extack);void netdev_upper_dev_unlink(struct net_device *dev, struct net_device *upper_dev);int netdev_adjacent_change_prepare(struct net_device *old_dev, struct net_device *new_dev, struct net_device *dev, struct netlink_ext_ack *extack);void netdev_adjacent_change_commit(struct net_device *old_dev, struct net_device *new_dev, struct net_device *dev);void netdev_adjacent_change_abort(struct net_device *old_dev, struct net_device *new_dev, struct net_device *dev);void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);void *netdev_lower_dev_get_private(struct net_device *dev, struct net_device *lower_dev);void netdev_lower_state_changed(struct net_device *lower_dev, void *lower_state_info);
#define NETDEV_RSS_KEY_LEN 256extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;void netdev_rss_key_fill(void *buffer, size_t len);
int skb_checksum_help(struct sk_buff *skb);int skb_crc32c_csum_help(struct sk_buff *skb);int skb_csum_hwoffload_help(struct sk_buff *skb, const netdev_features_t features);
struct netdev_bonding_info { ifslave slave; ifbond master;};
struct netdev_notifier_bonding_info { struct netdev_notifier_info info; /* must be first */ struct netdev_bonding_info bonding_info;};
void netdev_bonding_info_change(struct net_device *dev, struct netdev_bonding_info *bonding_info);
#if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)void ethtool_notify(struct net_device *dev, unsigned int cmd);#elsestatic inline void ethtool_notify(struct net_device *dev, unsigned int cmd){}#endif
__be16 skb_network_protocol(struct sk_buff *skb, int *depth);
static inline bool can_checksum_protocol(netdev_features_t features, __be16 protocol){ if (protocol == htons(ETH_P_FCOE)) return !!(features & NETIF_F_FCOE_CRC);
/* Assume this is an IP checksum (not SCTP CRC) */
if (features & NETIF_F_HW_CSUM) { /* Can checksum everything */ return true; }
switch (protocol) { case htons(ETH_P_IP): return !!(features & NETIF_F_IP_CSUM); case htons(ETH_P_IPV6): return !!(features & NETIF_F_IPV6_CSUM); default: return false; }}
#ifdef CONFIG_BUGvoid netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);#elsestatic inline void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb){}#endif/* rx skb timestamps */void net_enable_timestamp(void);void net_disable_timestamp(void);
static inline ktime_t netdev_get_tstamp(struct net_device *dev, const struct skb_shared_hwtstamps *hwtstamps, bool cycles){ const struct net_device_ops *ops = dev->netdev_ops;
if (ops->ndo_get_tstamp) return ops->ndo_get_tstamp(dev, hwtstamps, cycles);
return hwtstamps->hwtstamp;}
#ifndef CONFIG_PREEMPT_RTstatic inline void netdev_xmit_set_more(bool more){ __this_cpu_write(softnet_data.xmit.more, more);}
static inline bool netdev_xmit_more(void){ return __this_cpu_read(softnet_data.xmit.more);}#elsestatic inline void netdev_xmit_set_more(bool more){ current->net_xmit.more = more;}
static inline bool netdev_xmit_more(void){ return current->net_xmit.more;}#endif
static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops, struct sk_buff *skb, struct net_device *dev, bool more){ netdev_xmit_set_more(more); return ops->ndo_start_xmit(skb, dev);}
static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev, struct netdev_queue *txq, bool more){ const struct net_device_ops *ops = dev->netdev_ops; netdev_tx_t rc;
rc = __netdev_start_xmit(ops, skb, dev, more); if (rc == NETDEV_TX_OK) txq_trans_update(dev, txq);
return rc;}
int netdev_class_create_file_ns(const struct class_attribute *class_attr, const struct ns_common *ns);void netdev_class_remove_file_ns(const struct class_attribute *class_attr, const struct ns_common *ns);
extern const struct kobj_ns_type_operations net_ns_type_operations;
const char *netdev_drivername(const struct net_device *dev);
static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, netdev_features_t f2){ if ((f1 ^ f2) & NETIF_F_HW_CSUM) { if (f1 & NETIF_F_HW_CSUM) f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); else f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); }
return f1 & f2;}
static inline netdev_features_t netdev_get_wanted_features( struct net_device *dev){ return (dev->features & ~dev->hw_features) | dev->wanted_features;}netdev_features_t netdev_increment_features(netdev_features_t all, netdev_features_t one, netdev_features_t mask);
/* Allow TSO being used on stacked device : * Performing the GSO segmentation before last device * is a performance improvement. */static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, netdev_features_t mask){ return netdev_increment_features(features, NETIF_F_ALL_TSO | NETIF_F_ALL_FOR_ALL, mask);}
int __netdev_update_features(struct net_device *dev);void netdev_update_features(struct net_device *dev);void netdev_change_features(struct net_device *dev);void netdev_compute_master_upper_features(struct net_device *dev, bool update_header);
void netif_stacked_transfer_operstate(const struct net_device *rootdev, struct net_device *dev);
netdev_features_t passthru_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features);netdev_features_t netif_skb_features(struct sk_buff *skb);void skb_warn_bad_offload(const struct sk_buff *skb);
static inline bool net_gso_ok(netdev_features_t features, int gso_type){ netdev_features_t feature;
if (gso_type & (SKB_GSO_TCP_FIXEDID | SKB_GSO_TCP_FIXEDID_INNER)) gso_type |= __SKB_GSO_TCP_FIXEDID;
feature = ((netdev_features_t)gso_type << NETIF_F_GSO_SHIFT) & NETIF_F_GSO_MASK;
/* check flags correspondence */ BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(__SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT)); BUILD_BUG_ON(SKB_GSO_TCP_ACCECN != (NETIF_F_GSO_ACCECN >> NETIF_F_GSO_SHIFT));
return (features & feature) == feature;}
static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features){ return net_gso_ok(features, skb_shinfo(skb)->gso_type) && (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));}
static inline bool netif_needs_gso(struct sk_buff *skb, netdev_features_t features){ return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && (skb->ip_summed != CHECKSUM_UNNECESSARY)));}
void netif_set_tso_max_size(struct net_device *dev, unsigned int size);void netif_set_tso_max_segs(struct net_device *dev, unsigned int segs);void netif_inherit_tso_max(struct net_device *to, const struct net_device *from);
static inline unsigned intnetif_get_gro_max_size(const struct net_device *dev, const struct sk_buff *skb){ /* pairs with WRITE_ONCE() in netif_set_gro(_ipv4)_max_size() */ return skb->protocol == htons(ETH_P_IPV6) ? READ_ONCE(dev->gro_max_size) : READ_ONCE(dev->gro_ipv4_max_size);}
static inline unsigned intnetif_get_gso_max_size(const struct net_device *dev, const struct sk_buff *skb){ /* pairs with WRITE_ONCE() in netif_set_gso(_ipv4)_max_size() */ return skb->protocol == htons(ETH_P_IPV6) ? READ_ONCE(dev->gso_max_size) : READ_ONCE(dev->gso_ipv4_max_size);}
static inline bool netif_is_macsec(const struct net_device *dev){ return dev->priv_flags & IFF_MACSEC;}
static inline bool netif_is_macvlan(const struct net_device *dev){ return dev->priv_flags & IFF_MACVLAN;}
static inline bool netif_is_macvlan_port(const struct net_device *dev){ return dev->priv_flags & IFF_MACVLAN_PORT;}
static inline bool netif_is_bond_master(const struct net_device *dev){ return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;}
static inline bool netif_is_bond_slave(const struct net_device *dev){ return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;}
static inline bool netif_supports_nofcs(struct net_device *dev){ return dev->priv_flags & IFF_SUPP_NOFCS;}
static inline bool netif_has_l3_rx_handler(const struct net_device *dev){ return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;}
static inline bool netif_is_l3_master(const struct net_device *dev){ return dev->priv_flags & IFF_L3MDEV_MASTER;}
static inline bool netif_is_l3_slave(const struct net_device *dev){ return dev->priv_flags & IFF_L3MDEV_SLAVE;}
static inline int dev_sdif(const struct net_device *dev){#ifdef CONFIG_NET_L3_MASTER_DEV if (netif_is_l3_slave(dev)) return dev->ifindex;#endif return 0;}
static inline bool netif_is_bridge_master(const struct net_device *dev){ return dev->priv_flags & IFF_EBRIDGE;}
static inline bool netif_is_bridge_port(const struct net_device *dev){ return dev->priv_flags & IFF_BRIDGE_PORT;}
static inline bool netif_is_ovs_master(const struct net_device *dev){ return dev->priv_flags & IFF_OPENVSWITCH;}
static inline bool netif_is_ovs_port(const struct net_device *dev){ return dev->priv_flags & IFF_OVS_DATAPATH;}
static inline bool netif_is_any_bridge_master(const struct net_device *dev){ return netif_is_bridge_master(dev) || netif_is_ovs_master(dev);}
static inline bool netif_is_any_bridge_port(const struct net_device *dev){ return netif_is_bridge_port(dev) || netif_is_ovs_port(dev);}
static inline bool netif_is_team_master(const struct net_device *dev){ return dev->priv_flags & IFF_TEAM;}
static inline bool netif_is_team_port(const struct net_device *dev){ return dev->priv_flags & IFF_TEAM_PORT;}
static inline bool netif_is_lag_master(const struct net_device *dev){ return netif_is_bond_master(dev) || netif_is_team_master(dev);}
static inline bool netif_is_lag_port(const struct net_device *dev){ return netif_is_bond_slave(dev) || netif_is_team_port(dev);}
bool netif_is_rxfh_configured(const struct net_device *dev);
static inline bool netif_is_failover(const struct net_device *dev){ return dev->priv_flags & IFF_FAILOVER;}
static inline bool netif_is_failover_slave(const struct net_device *dev){ return dev->priv_flags & IFF_FAILOVER_SLAVE;}
/* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */static inline void netif_keep_dst(struct net_device *dev){ dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);}
/* return true if dev can't cope with mtu frames that need vlan tag insertion */static inline bool netif_reduces_vlan_mtu(struct net_device *dev){ /* TODO: reserve and use an additional IFF bit, if we get more users */ return netif_is_macsec(dev);}
extern struct pernet_operations __net_initdata loopback_net_ops;
/* Logging, debugging and troubleshooting/diagnostic helpers. */
/* netdev_printk helpers, similar to dev_printk */
static inline const char *netdev_name(const struct net_device *dev){ if (!dev->name[0] || strchr(dev->name, '%')) return "(unnamed net_device)"; return dev->name;}
static inline const char *netdev_reg_state(const struct net_device *dev){ u8 reg_state = READ_ONCE(dev->reg_state);
switch (reg_state) { case NETREG_UNINITIALIZED: return " (uninitialized)"; case NETREG_REGISTERED: return ""; case NETREG_UNREGISTERING: return " (unregistering)"; case NETREG_UNREGISTERED: return " (unregistered)"; case NETREG_RELEASED: return " (released)"; case NETREG_DUMMY: return " (dummy)"; }
WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, reg_state); return " (unknown)";}
#define MODULE_ALIAS_NETDEV(device) \ MODULE_ALIAS("netdev-" device)
/* * netdev_WARN() acts like dev_printk(), but with the key difference * of using a WARN/WARN_ON to get the message out, including the * file/line information and a backtrace. */#define netdev_WARN(dev, format, args...) \ WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \ netdev_reg_state(dev), ##args)
#define netdev_WARN_ONCE(dev, format, args...) \ WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \ netdev_reg_state(dev), ##args)
/* * The list of packet types we will receive (as opposed to discard) * and the routines to invoke. * * Why 16. Because with 16 the only overlap we get on a hash of the * low nibble of the protocol value is RARP/SNAP/X.25. * * 0800 IP * 0001 802.3 * 0002 AX.25 * 0004 802.2 * 8035 RARP * 0005 SNAP * 0805 X.25 * 0806 ARP * 8137 IPX * 0009 Localtalk * 86DD IPv6 */#define PTYPE_HASH_SIZE (16)#define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;
extern struct net_device *blackhole_netdev;
/* Note: Avoid these macros in fast path, prefer per-cpu or per-queue counters. */#define DEV_STATS_INC(DEV, FIELD) atomic_long_inc(&(DEV)->stats.__##FIELD)#define DEV_STATS_ADD(DEV, FIELD, VAL) \ atomic_long_add((VAL), &(DEV)->stats.__##FIELD)#define DEV_STATS_READ(DEV, FIELD) atomic_long_read(&(DEV)->stats.__##FIELD)
#endif /* _LINUX_NETDEVICE_H */