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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 <linux/percpu.h>
- #include <linux/rculist.h>
- #include <linux/workqueue.h>
- #include <linux/dynamic_queue_limits.h>
- #include <linux/ethtool.h>
- #include <net/net_namespace.h>
- #ifdef CONFIG_DCB
- #include <net/dcbnl.h>
- #endif
- #include <net/netprio_cgroup.h>
- #include <net/xdp.h>
- #include <linux/netdev_features.h>
- #include <linux/neighbour.h>
- #include <uapi/linux/netdevice.h>
- #include <uapi/linux/if_bonding.h>
- #include <uapi/linux/pkt_cls.h>
- #include <linux/hashtable.h>
- #include <linux/android_kabi.h>
- struct netpoll_info;
- struct device;
- struct phy_device;
- struct dsa_port;
- struct ip_tunnel_parm;
- struct macsec_context;
- struct macsec_ops;
- 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;
- void synchronize_net(void);
- void netdev_set_default_ethtool_ops(struct net_device *dev,
- const struct ethtool_ops *ops);
- /* 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) || IS_ENABLED(CONFIG_AX25)
- # 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.
- */
- struct net_device_stats {
- unsigned long rx_packets;
- unsigned long tx_packets;
- unsigned long rx_bytes;
- unsigned long tx_bytes;
- unsigned long rx_errors;
- unsigned long tx_errors;
- unsigned long rx_dropped;
- unsigned long tx_dropped;
- unsigned long multicast;
- unsigned long collisions;
- unsigned long rx_length_errors;
- unsigned long rx_over_errors;
- unsigned long rx_crc_errors;
- unsigned long rx_frame_errors;
- unsigned long rx_fifo_errors;
- unsigned long rx_missed_errors;
- unsigned long tx_aborted_errors;
- unsigned long tx_carrier_errors;
- unsigned long tx_fifo_errors;
- unsigned long tx_heartbeat_errors;
- unsigned long tx_window_errors;
- unsigned long rx_compressed;
- unsigned long tx_compressed;
- };
- #include <linux/cache.h>
- #include <linux/skbuff.h>
- #ifdef CONFIG_RPS
- #include <linux/static_key.h>
- extern struct static_key_false rps_needed;
- extern struct static_key_false rfs_needed;
- #endif
- struct neighbour;
- struct neigh_parms;
- struct sk_buff;
- struct netdev_hw_addr {
- struct list_head list;
- 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;
- };
- #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_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)
- 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(dev) \
- ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
- #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
- ((((dev)->hard_header_len+(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, 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);
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- };
- /* 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,
- };
- /*
- * This structure holds boot-time configured netdevice settings. They
- * are then used in the device probing.
- */
- struct netdev_boot_setup {
- char name[IFNAMSIZ];
- struct ifmap map;
- };
- #define NETDEV_BOOT_SETUP_MAX 8
- int __init netdev_boot_setup(char *str);
- struct gro_list {
- struct list_head list;
- int count;
- };
- /*
- * size of gro hash buckets, must less than bit number of
- * napi_struct::gro_bitmask
- */
- #define GRO_HASH_BUCKETS 8
- /*
- * Structure for NAPI scheduling similar to tasklet but with weighting
- */
- struct napi_struct {
- /* 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;
- unsigned long state;
- int weight;
- int defer_hard_irqs_count;
- unsigned long gro_bitmask;
- int (*poll)(struct napi_struct *, int);
- #ifdef CONFIG_NETPOLL
- int poll_owner;
- #endif
- struct net_device *dev;
- struct gro_list gro_hash[GRO_HASH_BUCKETS];
- struct sk_buff *skb;
- struct list_head rx_list; /* Pending GRO_NORMAL skbs */
- int rx_count; /* length of rx_list */
- struct hrtimer timer;
- struct list_head dev_list;
- struct hlist_node napi_hash_node;
- unsigned int napi_id;
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- };
- 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,/* sk_busy_loop() owns this NAPI */
- };
- 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),
- };
- enum gro_result {
- GRO_MERGED,
- GRO_MERGED_FREE,
- GRO_HELD,
- GRO_NORMAL,
- GRO_DROP,
- 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);
- }
- 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.
- */
- static inline void napi_schedule(struct napi_struct *n)
- {
- if (napi_schedule_prep(n))
- __napi_schedule(n);
- }
- /**
- * 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);
- }
- /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
- static inline bool napi_reschedule(struct napi_struct *napi)
- {
- if (napi_schedule_prep(napi)) {
- __napi_schedule(napi);
- return true;
- }
- return false;
- }
- bool napi_complete_done(struct napi_struct *n, int work_done);
- /**
- * napi_complete - NAPI processing complete
- * @n: NAPI context
- *
- * Mark NAPI processing as complete.
- * Consider using napi_complete_done() instead.
- * Return false if device should avoid rearming interrupts.
- */
- static inline bool napi_complete(struct napi_struct *n)
- {
- return napi_complete_done(n, 0);
- }
- /**
- * napi_disable - prevent NAPI from scheduling
- * @n: NAPI context
- *
- * Stop NAPI from being scheduled on this context.
- * Waits till any outstanding processing completes.
- */
- void napi_disable(struct napi_struct *n);
- /**
- * napi_enable - enable NAPI scheduling
- * @n: NAPI context
- *
- * Resume NAPI from being scheduled on this context.
- * Must be paired with napi_disable.
- */
- static inline void napi_enable(struct napi_struct *n)
- {
- BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
- smp_mb__before_atomic();
- clear_bit(NAPI_STATE_SCHED, &n->state);
- clear_bit(NAPI_STATE_NPSVC, &n->state);
- }
- /**
- * 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;
- do {
- val = READ_ONCE(n->state);
- if (val & NAPIF_STATE_DISABLE)
- return true;
- if (!(val & NAPIF_STATE_SCHED))
- return false;
- new = val | NAPIF_STATE_MISSED;
- } while (cmpxchg(&n->state, val, new) != val);
- 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;
- struct Qdisc __rcu *qdisc;
- struct Qdisc *qdisc_sleeping;
- #ifdef CONFIG_SYSFS
- struct kobject kobj;
- #endif
- #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
- int numa_node;
- #endif
- unsigned long tx_maxrate;
- /*
- * Number of TX timeouts for this queue
- * (/sys/class/net/DEV/Q/trans_timeout)
- */
- unsigned long trans_timeout;
- /* Subordinate device that the queue has been assigned to */
- struct net_device *sb_dev;
- #ifdef CONFIG_XDP_SOCKETS
- struct xsk_buff_pool *pool;
- #endif
- /*
- * write-mostly part
- */
- 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;
- #ifdef CONFIG_BQL
- struct dql dql;
- #endif
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- } ____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)
- {
- return !IS_ENABLED(CONFIG_SYSCTL) ||
- !sysctl_fb_tunnels_only_for_init_net ||
- (net == &init_net && sysctl_fb_tunnels_only_for_init_net == 1);
- }
- 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_RPS
- /*
- * This structure holds an RPS map which can be of variable length. The
- * map is an array of CPUs.
- */
- struct rps_map {
- unsigned int len;
- struct rcu_head rcu;
- u16 cpus[];
- };
- #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
- /*
- * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
- * tail pointer for that CPU's input queue at the time of last enqueue, and
- * a hardware filter index.
- */
- struct rps_dev_flow {
- u16 cpu;
- u16 filter;
- unsigned int last_qtail;
- };
- #define RPS_NO_FILTER 0xffff
- /*
- * The rps_dev_flow_table structure contains a table of flow mappings.
- */
- struct rps_dev_flow_table {
- unsigned int mask;
- struct rcu_head rcu;
- struct rps_dev_flow flows[];
- };
- #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
- ((_num) * sizeof(struct rps_dev_flow)))
- /*
- * The rps_sock_flow_table contains mappings of flows to the last CPU
- * on which they were processed by the application (set in recvmsg).
- * Each entry is a 32bit value. Upper part is the high-order bits
- * of flow hash, lower part is CPU number.
- * rps_cpu_mask is used to partition the space, depending on number of
- * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
- * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
- * meaning we use 32-6=26 bits for the hash.
- */
- struct rps_sock_flow_table {
- u32 mask;
- u32 ents[] ____cacheline_aligned_in_smp;
- };
- #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
- #define RPS_NO_CPU 0xffff
- extern u32 rps_cpu_mask;
- extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
- static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
- u32 hash)
- {
- if (table && hash) {
- unsigned int index = hash & table->mask;
- u32 val = hash & ~rps_cpu_mask;
- /* We only give a hint, preemption can change CPU under us */
- val |= raw_smp_processor_id();
- if (table->ents[index] != val)
- table->ents[index] = val;
- }
- }
- #ifdef CONFIG_RFS_ACCEL
- bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
- u16 filter_id);
- #endif
- #endif /* CONFIG_RPS */
- /* This structure contains an instance of an RX queue. */
- struct netdev_rx_queue {
- #ifdef CONFIG_RPS
- struct rps_map __rcu *rps_map;
- struct rps_dev_flow_table __rcu *rps_flow_table;
- #endif
- struct kobject kobj;
- struct net_device *dev;
- struct xdp_rxq_info xdp_rxq;
- #ifdef CONFIG_XDP_SOCKETS
- struct xsk_buff_pool *pool;
- #endif
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- } ____cacheline_aligned_in_smp;
- /*
- * RX queue sysfs structures and functions.
- */
- struct rx_queue_attribute {
- struct attribute attr;
- ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
- ssize_t (*store)(struct netdev_rx_queue *queue,
- const char *buf, size_t len);
- };
- #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.
- */
- struct xps_dev_maps {
- struct rcu_head rcu;
- 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 {
- u16 count;
- u16 offset;
- };
- #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 tc_setup_type {
- 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,
- };
- /* 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_OFFLOAD
- struct xfrmdev_ops {
- int (*xdo_dev_state_add) (struct xfrm_state *x);
- void (*xdo_dev_state_delete) (struct xfrm_state *x);
- void (*xdo_dev_state_free) (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);
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- };
- #endif
- struct dev_ifalias {
- struct rcu_head rcuhead;
- char ifalias[];
- };
- struct devlink;
- struct tlsdev_ops;
- struct netdev_name_node {
- struct hlist_node hlist;
- struct list_head list;
- struct net_device *dev;
- const char *name;
- };
- int netdev_name_node_alt_create(struct net_device *dev, const char *name);
- int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
- 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.
- *
- * 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);
- * Called when a user requests an ioctl which can't be handled by
- * the generic interface code. If not defined ioctls return
- * not supported error code.
- *
- * 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.
- *
- * 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,
- * struct netlink_ext_ack *extack);
- * Adds an FDB entry to dev for addr.
- * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
- * struct net_device *dev,
- * const unsigned char *addr, u16 vid)
- * Deletes the FDB entry from dev coresponding to addr.
- * 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_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_udp_tunnel_add)(struct net_device *dev,
- * struct udp_tunnel_info *ti);
- * Called by UDP tunnel to notify a driver about the UDP port and socket
- * address family that a UDP tunnel is listnening to. It is called only
- * when a new port starts listening. The operation is protected by the
- * RTNL.
- *
- * void (*ndo_udp_tunnel_del)(struct net_device *dev,
- * struct udp_tunnel_info *ti);
- * Called by UDP tunnel to notify the driver about a UDP port and socket
- * address family that the UDP tunnel is not listening to anymore. The
- * operation is protected by the RTNL.
- *
- * 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.
- * void (*ndo_change_proto_down)(struct net_device *dev,
- * bool proto_down);
- * This function is used to pass protocol port error state information
- * to the switch driver. The switch driver can react to the proto_down
- * by doing a phys down on the associated switch port.
- * 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.
- * 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.
- * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
- * Get devlink port instance associated with a given netdev.
- * Called with a reference on the netdevice and devlink locks only,
- * rtnl_lock is not held.
- * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *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.
- */
- 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_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_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,
- struct netpoll_info *info);
- 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);
- 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,
- 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);
- 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_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_udp_tunnel_add)(struct net_device *dev,
- struct udp_tunnel_info *ti);
- void (*ndo_udp_tunnel_del)(struct net_device *dev,
- struct udp_tunnel_info *ti);
- 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_change_proto_down)(struct net_device *dev,
- bool proto_down);
- 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);
- int (*ndo_xsk_wakeup)(struct net_device *dev,
- u32 queue_id, u32 flags);
- struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
- int (*ndo_tunnel_ctl)(struct net_device *dev,
- struct ip_tunnel_parm *p, int cmd);
- struct net_device * (*ndo_get_peer_dev)(struct net_device *dev);
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- ANDROID_KABI_RESERVE(5);
- ANDROID_KABI_RESERVE(6);
- ANDROID_KABI_RESERVE(7);
- ANDROID_KABI_RESERVE(8);
- };
- /**
- * enum net_device_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 have a pretty good reason to be 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_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
- * @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_LIVE_RENAME_OK: rename is allowed while device is up and running
- */
- 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_RXFH_CONFIGURED = 1<<23,
- 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_LIVE_RENAME_OK = 1<<30,
- };
- #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
- #define IFF_EBRIDGE IFF_EBRIDGE
- #define IFF_BONDING IFF_BONDING
- #define IFF_ISATAP IFF_ISATAP
- #define IFF_WAN_HDLC IFF_WAN_HDLC
- #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
- #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
- #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
- #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
- #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
- #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
- #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
- #define IFF_UNICAST_FLT IFF_UNICAST_FLT
- #define IFF_TEAM_PORT IFF_TEAM_PORT
- #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
- #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
- #define IFF_MACVLAN IFF_MACVLAN
- #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
- #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
- #define IFF_NO_QUEUE IFF_NO_QUEUE
- #define IFF_OPENVSWITCH IFF_OPENVSWITCH
- #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
- #define IFF_TEAM IFF_TEAM
- #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
- #define IFF_MACSEC IFF_MACSEC
- #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
- #define IFF_FAILOVER IFF_FAILOVER
- #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
- #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
- #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
- /* Specifies the type of the struct net_device::ml_priv pointer */
- enum netdev_ml_priv_type {
- ML_PRIV_NONE,
- ML_PRIV_CAN,
- };
- /**
- * 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.
- *
- * @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
- * @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\*
- *
- * @ifindex: interface index
- * @group: The group the device belongs to
- *
- * @stats: Statistics struct, which was left as a legacy, use
- * rtnl_link_stats64 instead
- *
- * @rx_dropped: Dropped packets by core network,
- * do not use this in drivers
- * @tx_dropped: Dropped packets by core network,
- * do not use this in drivers
- * @rx_nohandler: nohandler dropped packets by core network on
- * inactive devices, 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.
- * @wireless_data: Instance data managed by the core of wireless extensions
- *
- * @netdev_ops: Includes several pointers to callbacks,
- * if one wants to override the ndo_*() functions
- * @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)
- * @priv_flags: Like 'flags' but invisible to userspace,
- * see if.h for the definitions
- * @gflags: Global flags ( kept as legacy )
- * @padded: How much padding added by alloc_netdev()
- * @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.
- * @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()
- * @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
- * @atalk_ptr: AppleTalk link
- * @ip_ptr: IPv4 specific data
- * @dn_ptr: DECnet specific data
- * @ip6_ptr: IPv6 specific data
- * @ax25_ptr: AX.25 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
- *
- * @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
- * @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.
- *
- * @rx_handler: handler for received packets
- * @rx_handler_data: XXX: need comments on this one
- * @miniq_ingress: ingress/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_cpus_map: all CPUs map for XPS device
- * @xps_rxqs_map: all RXQs map for XPS device
- *
- * @xps_maps: XXX: need comments on this one
- * @miniq_egress: clsact qdisc specific data for
- * egress processing
- * @qdisc_hash: qdisc hash table
- * @watchdog_timeo: Represents the timeout that is used by
- * the watchdog (see dev_watchdog())
- * @watchdog_timer: List of timers
- *
- * @proto_down_reason: reason a netdev interface is held down
- * @pcpu_refcnt: Number of 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
- * @rtnl_link_state: This enum represents the phases of creating
- * a new link
- *
- * @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
- *
- * @ml_priv: Mid-layer private
- * @ml_priv_type: Mid-layer private type
- * @lstats: Loopback statistics
- * @tstats: Tunnel statistics
- * @dstats: Dummy statistics
- * @vstats: Virtual ethernet statistics
- *
- * @garp_port: GARP
- * @mrp_port: MRP
- *
- * @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
- *
- * @gso_max_size: Maximum size of generic segmentation offload
- * @gso_max_segs: Maximum number of segments that can be passed to the
- * NIC for GSO
- *
- * @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
- * @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
- * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
- *
- * @proto_down: protocol port state information can be sent to the
- * switch driver and used to set the phys state of the
- * switch port.
- *
- * @wol_enabled: Wake-on-LAN is enabled
- *
- * @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
- * @xdp_state: stores info on attached XDP BPF programs
- *
- * @nested_level: Used as 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.
- *
- * FIXME: cleanup struct net_device such that network protocol info
- * moves out.
- */
- struct net_device {
- 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;
- int irq;
- /*
- * 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.
- */
- unsigned long state;
- struct list_head dev_list;
- struct list_head napi_list;
- struct list_head unreg_list;
- struct list_head close_list;
- struct list_head ptype_all;
- struct list_head ptype_specific;
- struct {
- struct list_head upper;
- struct list_head lower;
- } adj_list;
- netdev_features_t features;
- 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 gso_partial_features;
- int ifindex;
- int group;
- struct net_device_stats stats;
- atomic_long_t rx_dropped;
- atomic_long_t tx_dropped;
- atomic_long_t rx_nohandler;
- /* 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;
- struct iw_public_data *wireless_data;
- #endif
- const struct net_device_ops *netdev_ops;
- 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
- const struct header_ops *header_ops;
- unsigned int flags;
- unsigned int priv_flags;
- unsigned short gflags;
- unsigned short padded;
- unsigned char operstate;
- unsigned char link_mode;
- unsigned char if_port;
- unsigned char dma;
- /* 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 int min_mtu;
- unsigned int max_mtu;
- unsigned short type;
- unsigned short hard_header_len;
- unsigned char min_header_len;
- unsigned char name_assign_type;
- unsigned short needed_headroom;
- unsigned short needed_tailroom;
- /* 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;
- unsigned short neigh_priv_len;
- unsigned short dev_id;
- unsigned short dev_port;
- 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;
- #ifdef CONFIG_LOCKDEP
- unsigned char nested_level;
- #endif
- /* Protocol-specific pointers */
- #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_IRDA) || IS_ENABLED(CONFIG_ATALK)
- void *atalk_ptr;
- #endif
- struct in_device __rcu *ip_ptr;
- #if IS_ENABLED(CONFIG_DECNET)
- struct dn_dev __rcu *dn_ptr;
- #endif
- struct inet6_dev __rcu *ip6_ptr;
- #if IS_ENABLED(CONFIG_AX25)
- void *ax25_ptr;
- #endif
- struct wireless_dev *ieee80211_ptr;
- struct wpan_dev *ieee802154_ptr;
- #if IS_ENABLED(CONFIG_MPLS_ROUTING)
- struct mpls_dev __rcu *mpls_ptr;
- #endif
- /*
- * Cache lines mostly used on receive path (including eth_type_trans())
- */
- /* Interface address info used in eth_type_trans() */
- unsigned char *dev_addr;
- struct netdev_rx_queue *_rx;
- unsigned int num_rx_queues;
- unsigned int real_num_rx_queues;
- struct bpf_prog __rcu *xdp_prog;
- unsigned long gro_flush_timeout;
- int napi_defer_hard_irqs;
- rx_handler_func_t __rcu *rx_handler;
- void __rcu *rx_handler_data;
- #ifdef CONFIG_NET_CLS_ACT
- struct mini_Qdisc __rcu *miniq_ingress;
- #endif
- 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
- */
- struct netdev_queue *_tx ____cacheline_aligned_in_smp;
- unsigned int num_tx_queues;
- unsigned int real_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_XPS
- struct xps_dev_maps __rcu *xps_cpus_map;
- struct xps_dev_maps __rcu *xps_rxqs_map;
- #endif
- #ifdef CONFIG_NET_CLS_ACT
- struct mini_Qdisc __rcu *miniq_egress;
- #endif
- #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;
- u32 proto_down_reason;
- struct list_head todo_list;
- int __percpu *pcpu_refcnt;
- struct list_head link_watch_list;
- enum { 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 */
- } reg_state:8;
- bool dismantle;
- enum {
- RTNL_LINK_INITIALIZED,
- RTNL_LINK_INITIALIZING,
- } rtnl_link_state:16;
- bool needs_free_netdev;
- void (*priv_destructor)(struct net_device *dev);
- #ifdef CONFIG_NETPOLL
- struct netpoll_info __rcu *npinfo;
- #endif
- possible_net_t nd_net;
- /* mid-layer private */
- void *ml_priv;
- enum netdev_ml_priv_type ml_priv_type;
- union {
- struct pcpu_lstats __percpu *lstats;
- struct pcpu_sw_netstats __percpu *tstats;
- struct pcpu_dstats __percpu *dstats;
- };
- #if IS_ENABLED(CONFIG_GARP)
- struct garp_port __rcu *garp_port;
- #endif
- #if IS_ENABLED(CONFIG_MRP)
- struct mrp_port __rcu *mrp_port;
- #endif
- struct device dev;
- const struct attribute_group *sysfs_groups[4];
- const struct attribute_group *sysfs_rx_queue_group;
- const struct rtnl_link_ops *rtnl_link_ops;
- /* for setting kernel sock attribute on TCP connection setup */
- #define GSO_MAX_SIZE 65536
- unsigned int gso_max_size;
- #define GSO_MAX_SEGS 65535
- u16 gso_max_segs;
- #ifdef CONFIG_DCB
- const struct dcbnl_rtnl_ops *dcbnl_ops;
- #endif
- s16 num_tc;
- struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
- 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_device *phydev;
- struct sfp_bus *sfp_bus;
- struct lock_class_key *qdisc_tx_busylock;
- struct lock_class_key *qdisc_running_key;
- bool proto_down;
- unsigned wol_enabled: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;
- /* protected by rtnl_lock */
- struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE];
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- ANDROID_KABI_RESERVE(5);
- ANDROID_KABI_RESERVE(6);
- ANDROID_KABI_RESERVE(7);
- ANDROID_KABI_RESERVE(8);
- };
- #define to_net_dev(d) container_of(d, struct net_device, dev)
- 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 inline
- int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
- {
- return dev->prio_tc_map[prio & TC_BITMASK];
- }
- static inline
- int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
- {
- if (tc >= dev->num_tc)
- return -EINVAL;
- 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 inline
- int netdev_get_num_tc(struct net_device *dev)
- {
- return 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, -dev->num_tc, 0);
- }
- static inline
- struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
- unsigned int index)
- {
- 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);
- }
- #define netdev_lockdep_set_classes(dev) \
- { \
- static struct lock_class_key qdisc_tx_busylock_key; \
- static struct lock_class_key qdisc_running_key; \
- static struct lock_class_key qdisc_xmit_lock_key; \
- static struct lock_class_key dev_addr_list_lock_key; \
- unsigned int i; \
- \
- (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
- (dev)->qdisc_running_key = &qdisc_running_key; \
- lockdep_set_class(&(dev)->addr_list_lock, \
- &dev_addr_list_lock_key); \
- for (i = 0; i < (dev)->num_tx_queues; i++) \
- lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
- &qdisc_xmit_lock_key); \
- }
- 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 inline
- struct net *dev_net(const struct net_device *dev)
- {
- return read_pnet(&dev->nd_net);
- }
- static inline
- void 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 (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
- }
- /* 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))
- /* Default NAPI poll() weight
- * Device drivers are strongly advised to not use bigger value
- */
- #define NAPI_POLL_WEIGHT 64
- /**
- * netif_napi_add - initialize a NAPI context
- * @dev: network device
- * @napi: NAPI context
- * @poll: polling function
- * @weight: default weight
- *
- * netif_napi_add() must be used to initialize a NAPI context prior to calling
- * *any* of the other NAPI-related functions.
- */
- void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
- int (*poll)(struct napi_struct *, int), int weight);
- /**
- * netif_tx_napi_add - initialize a NAPI context
- * @dev: network device
- * @napi: NAPI context
- * @poll: polling function
- * @weight: default weight
- *
- * 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_tx_napi_add(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(dev, napi, poll, weight);
- }
- /**
- * __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.
- */
- void __netif_napi_del(struct napi_struct *napi);
- /**
- * 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();
- }
- struct napi_gro_cb {
- /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
- void *frag0;
- /* Length of frag0. */
- unsigned int frag0_len;
- /* This indicates where we are processing relative to skb->data. */
- int data_offset;
- /* This is non-zero if the packet cannot be merged with the new skb. */
- u16 flush;
- /* Save the IP ID here and check when we get to the transport layer */
- u16 flush_id;
- /* Number of segments aggregated. */
- u16 count;
- /* Start offset for remote checksum offload */
- u16 gro_remcsum_start;
- /* jiffies when first packet was created/queued */
- unsigned long age;
- /* Used in ipv6_gro_receive() and foo-over-udp */
- u16 proto;
- /* This is non-zero if the packet may be of the same flow. */
- u8 same_flow:1;
- /* Used in tunnel GRO receive */
- u8 encap_mark:1;
- /* GRO checksum is valid */
- u8 csum_valid:1;
- /* Number of checksums via CHECKSUM_UNNECESSARY */
- u8 csum_cnt:3;
- /* Free the skb? */
- u8 free:2;
- #define NAPI_GRO_FREE 1
- #define NAPI_GRO_FREE_STOLEN_HEAD 2
- /* Used in foo-over-udp, set in udp[46]_gro_receive */
- u8 is_ipv6:1;
- /* Used in GRE, set in fou/gue_gro_receive */
- u8 is_fou:1;
- /* Used to determine if flush_id can be ignored */
- u8 is_atomic:1;
- /* Number of gro_receive callbacks this packet already went through */
- u8 recursion_counter:4;
- /* GRO is done by frag_list pointer chaining. */
- u8 is_flist:1;
- /* used to support CHECKSUM_COMPLETE for tunneling protocols */
- __wsum csum;
- /* used in skb_gro_receive() slow path */
- struct sk_buff *last;
- };
- #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
- #define GRO_RECURSION_LIMIT 15
- static inline int gro_recursion_inc_test(struct sk_buff *skb)
- {
- return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
- }
- typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
- static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
- struct list_head *head,
- struct sk_buff *skb)
- {
- if (unlikely(gro_recursion_inc_test(skb))) {
- NAPI_GRO_CB(skb)->flush |= 1;
- return NULL;
- }
- return cb(head, skb);
- }
- typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
- struct sk_buff *);
- static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
- struct sock *sk,
- struct list_head *head,
- struct sk_buff *skb)
- {
- if (unlikely(gro_recursion_inc_test(skb))) {
- NAPI_GRO_CB(skb)->flush |= 1;
- return NULL;
- }
- return cb(sk, head, skb);
- }
- struct packet_type {
- __be16 type; /* This is really htons(ether_type). */
- bool ignore_outgoing;
- struct net_device *dev; /* NULL is wildcarded here */
- 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;
- ANDROID_KABI_RESERVE(1);
- ANDROID_KABI_RESERVE(2);
- ANDROID_KABI_RESERVE(3);
- ANDROID_KABI_RESERVE(4);
- };
- 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 rx_packets;
- u64 rx_bytes;
- u64 tx_packets;
- u64 tx_bytes;
- struct u64_stats_sync syncp;
- } __aligned(4 * 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);
- tstats->rx_bytes += len;
- tstats->rx_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);
- }
- #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)
- 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_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_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,
- };
- 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;
- };
- 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);
- extern rwlock_t dev_base_lock; /* Device list lock */
- #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(&init_net, slave) \
- if (netdev_master_upper_dev_get_rcu(slave) == (bond))
- #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
- 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);
- }
- static inline struct net_device *first_net_device_rcu(struct net *net)
- {
- struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
- return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
- }
- int netdev_boot_setup_check(struct net_device *dev);
- unsigned long netdev_boot_base(const char *prefix, int unit);
- 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);
- 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);
- struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
- unsigned short mask);
- 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);
- int dev_alloc_name(struct net_device *dev, const char *name);
- int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
- void dev_close(struct net_device *dev);
- void dev_close_many(struct list_head *head, bool unlink);
- 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);
- u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
- struct net_device *sb_dev);
- int dev_queue_xmit(struct sk_buff *skb);
- int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
- int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
- 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);
- static inline void unregister_netdevice(struct net_device *dev)
- {
- unregister_netdevice_queue(dev, NULL);
- }
- int netdev_refcnt_read(const struct net_device *dev);
- void free_netdev(struct net_device *dev);
- void netdev_freemem(struct net_device *dev);
- int init_dummy_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 *dev_get_by_index(struct net *net, int ifindex);
- struct net_device *__dev_get_by_index(struct net *net, int ifindex);
- struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
- struct net_device *dev_get_by_napi_id(unsigned int napi_id);
- int netdev_get_name(struct net *net, char *name, int ifindex);
- int dev_restart(struct net_device *dev);
- int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
- int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
- static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
- {
- return NAPI_GRO_CB(skb)->data_offset;
- }
- static inline unsigned int skb_gro_len(const struct sk_buff *skb)
- {
- return skb->len - NAPI_GRO_CB(skb)->data_offset;
- }
- static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
- {
- NAPI_GRO_CB(skb)->data_offset += len;
- }
- static inline void *skb_gro_header_fast(struct sk_buff *skb,
- unsigned int offset)
- {
- return NAPI_GRO_CB(skb)->frag0 + offset;
- }
- static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
- {
- return NAPI_GRO_CB(skb)->frag0_len < hlen;
- }
- static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
- {
- NAPI_GRO_CB(skb)->frag0 = NULL;
- NAPI_GRO_CB(skb)->frag0_len = 0;
- }
- static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
- unsigned int offset)
- {
- if (!pskb_may_pull(skb, hlen))
- return NULL;
- skb_gro_frag0_invalidate(skb);
- return skb->data + offset;
- }
- static inline void *skb_gro_network_header(struct sk_buff *skb)
- {
- return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
- skb_network_offset(skb);
- }
- static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
- const void *start, unsigned int len)
- {
- if (NAPI_GRO_CB(skb)->csum_valid)
- NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
- csum_partial(start, len, 0));
- }
- /* GRO checksum functions. These are logical equivalents of the normal
- * checksum functions (in skbuff.h) except that they operate on the GRO
- * offsets and fields in sk_buff.
- */
- __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
- static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
- {
- return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
- }
- static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
- bool zero_okay,
- __sum16 check)
- {
- return ((skb->ip_summed != CHECKSUM_PARTIAL ||
- skb_checksum_start_offset(skb) <
- skb_gro_offset(skb)) &&
- !skb_at_gro_remcsum_start(skb) &&
- NAPI_GRO_CB(skb)->csum_cnt == 0 &&
- (!zero_okay || check));
- }
- static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
- __wsum psum)
- {
- if (NAPI_GRO_CB(skb)->csum_valid &&
- !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
- return 0;
- NAPI_GRO_CB(skb)->csum = psum;
- return __skb_gro_checksum_complete(skb);
- }
- static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
- {
- if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
- /* Consume a checksum from CHECKSUM_UNNECESSARY */
- NAPI_GRO_CB(skb)->csum_cnt--;
- } else {
- /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
- * verified a new top level checksum or an encapsulated one
- * during GRO. This saves work if we fallback to normal path.
- */
- __skb_incr_checksum_unnecessary(skb);
- }
- }
- #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
- compute_pseudo) \
- ({ \
- __sum16 __ret = 0; \
- if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
- __ret = __skb_gro_checksum_validate_complete(skb, \
- compute_pseudo(skb, proto)); \
- if (!__ret) \
- skb_gro_incr_csum_unnecessary(skb); \
- __ret; \
- })
- #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
- __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
- #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
- compute_pseudo) \
- __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
- #define skb_gro_checksum_simple_validate(skb) \
- __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
- static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
- {
- return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
- !NAPI_GRO_CB(skb)->csum_valid);
- }
- static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
- __wsum pseudo)
- {
- NAPI_GRO_CB(skb)->csum = ~pseudo;
- NAPI_GRO_CB(skb)->csum_valid = 1;
- }
- #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \
- do { \
- if (__skb_gro_checksum_convert_check(skb)) \
- __skb_gro_checksum_convert(skb, \
- compute_pseudo(skb, proto)); \
- } while (0)
- struct gro_remcsum {
- int offset;
- __wsum delta;
- };
- static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
- {
- grc->offset = 0;
- grc->delta = 0;
- }
- static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
- unsigned int off, size_t hdrlen,
- int start, int offset,
- struct gro_remcsum *grc,
- bool nopartial)
- {
- __wsum delta;
- size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
- BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
- if (!nopartial) {
- NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
- return ptr;
- }
- ptr = skb_gro_header_fast(skb, off);
- if (skb_gro_header_hard(skb, off + plen)) {
- ptr = skb_gro_header_slow(skb, off + plen, off);
- if (!ptr)
- return NULL;
- }
- delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
- start, offset);
- /* Adjust skb->csum since we changed the packet */
- NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
- grc->offset = off + hdrlen + offset;
- grc->delta = delta;
- return ptr;
- }
- static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
- struct gro_remcsum *grc)
- {
- void *ptr;
- size_t plen = grc->offset + sizeof(u16);
- if (!grc->delta)
- return;
- ptr = skb_gro_header_fast(skb, grc->offset);
- if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
- ptr = skb_gro_header_slow(skb, plen, grc->offset);
- if (!ptr)
- return;
- }
- remcsum_unadjust((__sum16 *)ptr, grc->delta);
- }
- #ifdef CONFIG_XFRM_OFFLOAD
- static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
- {
- if (PTR_ERR(pp) != -EINPROGRESS)
- NAPI_GRO_CB(skb)->flush |= flush;
- }
- static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
- struct sk_buff *pp,
- int flush,
- struct gro_remcsum *grc)
- {
- if (PTR_ERR(pp) != -EINPROGRESS) {
- NAPI_GRO_CB(skb)->flush |= flush;
- skb_gro_remcsum_cleanup(skb, grc);
- skb->remcsum_offload = 0;
- }
- }
- #else
- static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
- {
- NAPI_GRO_CB(skb)->flush |= flush;
- }
- static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
- struct sk_buff *pp,
- int flush,
- struct gro_remcsum *grc)
- {
- NAPI_GRO_CB(skb)->flush |= flush;
- skb_gro_remcsum_cleanup(skb, grc);
- skb->remcsum_offload = 0;
- }
- #endif
- 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, 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 (capable(CAP_SYS_RAWIO)) {
- memset(ll_header + len, 0, dev->hard_header_len - len);
- return true;
- }
- 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;
- }
- typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
- int len, int size);
- int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
- static inline int unregister_gifconf(unsigned int family)
- {
- return register_gifconf(family, NULL);
- }
- #ifdef CONFIG_NET_FLOW_LIMIT
- #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
- struct sd_flow_limit {
- u64 count;
- unsigned int num_buckets;
- unsigned int history_head;
- u16 history[FLOW_LIMIT_HISTORY];
- u8 buckets[];
- };
- extern int netdev_flow_limit_table_len;
- #endif /* CONFIG_NET_FLOW_LIMIT */
- /*
- * Incoming packets are placed on per-CPU queues
- */
- struct softnet_data {
- struct list_head poll_list;
- struct sk_buff_head process_queue;
- /* stats */
- unsigned int processed;
- unsigned int time_squeeze;
- unsigned int received_rps;
- #ifdef CONFIG_RPS
- struct softnet_data *rps_ipi_list;
- #endif
- #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 {
- u16 recursion;
- u8 more;
- } 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;
- unsigned int input_queue_tail;
- #endif
- unsigned int dropped;
- struct sk_buff_head input_pkt_queue;
- struct napi_struct backlog;
- };
- static inline void input_queue_head_incr(struct softnet_data *sd)
- {
- #ifdef CONFIG_RPS
- sd->input_queue_head++;
- #endif
- }
- static inline void input_queue_tail_incr_save(struct softnet_data *sd,
- unsigned int *qtail)
- {
- #ifdef CONFIG_RPS
- *qtail = ++sd->input_queue_tail;
- #endif
- }
- DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
- static inline int dev_recursion_level(void)
- {
- return this_cpu_read(softnet_data.xmit.recursion);
- }
- #define XMIT_RECURSION_LIMIT 8
- 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);
- }
- 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)
- {
- 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 bool
- netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
- {
- return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
- }
- static inline bool
- netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
- {
- return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
- }
- /**
- * 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
- }
- 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;
- 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();
- /* 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. @bytes should be a good approximation and should
- * exactly match netdev_completed_queue() @bytes
- */
- 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);
- }
- 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 possiblity that
- * netdev_tx_sent_queue will miss the update and cause the queue to
- * be stopped forever
- */
- smp_mb();
- 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_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_queue(netdev_get_tx_queue(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);
- }
- 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_XPS
- int 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, bool is_rxqs_map);
- /**
- * 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 >= 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 >= 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;
- }
- #else
- static 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, bool is_rxqs_map)
- {
- 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);
- #ifdef CONFIG_SYSFS
- int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
- #else
- static inline int netif_set_real_num_rx_queues(struct net_device *dev,
- unsigned int rxqs)
- {
- dev->real_num_rx_queues = rxqs;
- return 0;
- }
- #endif
- static inline struct netdev_rx_queue *
- __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
- {
- return dev->_rx + rxq;
- }
- #ifdef CONFIG_SYSFS
- static inline unsigned int get_netdev_rx_queue_index(
- struct netdev_rx_queue *queue)
- {
- struct net_device *dev = queue->dev;
- int index = queue - dev->_rx;
- BUG_ON(index >= dev->num_rx_queues);
- return index;
- }
- #endif
- #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
- int netif_get_num_default_rss_queues(void);
- enum skb_free_reason {
- SKB_REASON_CONSUMED,
- SKB_REASON_DROPPED,
- };
- void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
- void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
- /*
- * It is not allowed to call kfree_skb() or consume_skb() from hardware
- * interrupt context or with hardware interrupts being disabled.
- * (in_irq() || 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(skb, SKB_REASON_DROPPED);
- }
- static inline void dev_consume_skb_irq(struct sk_buff *skb)
- {
- __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
- }
- static inline void dev_kfree_skb_any(struct sk_buff *skb)
- {
- __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
- }
- static inline void dev_consume_skb_any(struct sk_buff *skb)
- {
- __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
- }
- void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
- int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
- int netif_rx(struct sk_buff *skb);
- int netif_rx_ni(struct sk_buff *skb);
- int netif_rx_any_context(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(struct list_head *head);
- gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
- void napi_gro_flush(struct napi_struct *napi, bool flush_old);
- struct sk_buff *napi_get_frags(struct napi_struct *napi);
- gro_result_t napi_gro_frags(struct napi_struct *napi);
- struct packet_offload *gro_find_receive_by_type(__be16 type);
- struct packet_offload *gro_find_complete_by_type(__be16 type);
- 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 dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
- bool *need_copyout);
- int dev_ifconf(struct net *net, struct ifconf *, int);
- int dev_ethtool(struct net *net, struct ifreq *);
- unsigned int dev_get_flags(const struct net_device *);
- int __dev_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);
- void __dev_notify_flags(struct net_device *, unsigned int old_flags,
- unsigned int gchanges);
- int dev_change_name(struct net_device *, const char *);
- 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 *, struct net *, const char *);
- int __dev_set_mtu(struct net_device *, int);
- int dev_validate_mtu(struct net_device *dev, int mtu,
- struct netlink_ext_ack *extack);
- int dev_set_mtu_ext(struct net_device *dev, int mtu,
- struct netlink_ext_ack *extack);
- int dev_set_mtu(struct net_device *, int);
- int dev_change_tx_queue_len(struct net_device *, unsigned long);
- void dev_set_group(struct net_device *, int);
- int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
- struct netlink_ext_ack *extack);
- int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
- struct netlink_ext_ack *extack);
- int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa,
- struct netlink_ext_ack *extack);
- int dev_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name);
- int dev_change_carrier(struct net_device *, bool new_carrier);
- int dev_get_phys_port_id(struct net_device *dev,
- struct netdev_phys_item_id *ppid);
- int dev_get_phys_port_name(struct net_device *dev,
- char *name, size_t len);
- int dev_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);
- int dev_change_proto_down(struct net_device *dev, bool proto_down);
- int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
- void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
- u32 value);
- 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);
- typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
- int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
- int fd, int expected_fd, u32 flags);
- int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
- u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode);
- int xdp_umem_query(struct net_device *dev, u16 queue_id);
- int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
- int dev_forward_skb(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 int ____dev_forward_skb(struct net_device *dev,
- struct sk_buff *skb)
- {
- if (skb_orphan_frags(skb, GFP_ATOMIC) ||
- unlikely(!is_skb_forwardable(dev, skb))) {
- atomic_long_inc(&dev->rx_dropped);
- kfree_skb(skb);
- return NET_RX_DROP;
- }
- skb_scrub_packet(skb, true);
- skb->priority = 0;
- return 0;
- }
- bool dev_nit_active(struct net_device *dev);
- void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
- extern int netdev_budget;
- extern unsigned int netdev_budget_usecs;
- /* Called by rtnetlink.c:rtnl_unlock() */
- void netdev_run_todo(void);
- /**
- * dev_put - release reference to device
- * @dev: network device
- *
- * Release reference to device to allow it to be freed.
- */
- static inline void dev_put(struct net_device *dev)
- {
- if (dev)
- this_cpu_dec(*dev->pcpu_refcnt);
- }
- /**
- * dev_hold - get reference to device
- * @dev: network device
- *
- * Hold reference to device to keep it from being freed.
- */
- static inline void dev_hold(struct net_device *dev)
- {
- if (dev)
- this_cpu_inc(*dev->pcpu_refcnt);
- }
- /* 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_init_dev(struct net_device *dev);
- void linkwatch_fire_event(struct net_device *dev);
- void linkwatch_forget_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);
- /**
- * 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)
- {
- return (dev->operstate == IF_OPER_UP ||
- dev->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(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 __dev_queue_xmit() */
- 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 __dev_queue_xmit() */
- 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 __dev_queue_xmit() */
- 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 __dev_queue_xmit() */
- 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 __dev_queue_xmit() */
- WRITE_ONCE(txq->xmit_lock_owner, -1);
- spin_unlock_bh(&txq->_xmit_lock);
- }
- static inline void txq_trans_update(struct netdev_queue *txq)
- {
- if (txq->xmit_lock_owner != -1)
- txq->trans_start = jiffies;
- }
- /* 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);
- if (txq->trans_start != jiffies)
- txq->trans_start = jiffies;
- }
- /**
- * netif_tx_lock - grab network device transmit lock
- * @dev: network device
- *
- * Get network device transmit lock
- */
- static inline void netif_tx_lock(struct net_device *dev)
- {
- unsigned int i;
- int cpu;
- spin_lock(&dev->tx_global_lock);
- cpu = smp_processor_id();
- for (i = 0; i < dev->num_tx_queues; i++) {
- struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
- /* We are the only thread of execution doing a
- * freeze, but we have to grab the _xmit_lock in
- * order to synchronize with threads which are in
- * the ->hard_start_xmit() handler and already
- * checked the frozen bit.
- */
- __netif_tx_lock(txq, cpu);
- set_bit(__QUEUE_STATE_FROZEN, &txq->state);
- __netif_tx_unlock(txq);
- }
- }
- static inline void netif_tx_lock_bh(struct net_device *dev)
- {
- local_bh_disable();
- netif_tx_lock(dev);
- }
- static inline void netif_tx_unlock(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);
- /* No need to grab the _xmit_lock here. If the
- * queue is not stopped for another reason, we
- * force a schedule.
- */
- clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
- netif_schedule_queue(txq);
- }
- spin_unlock(&dev->tx_global_lock);
- }
- 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->features & NETIF_F_LLTX) == 0) { \
- __netif_tx_lock(txq, cpu); \
- } else { \
- __netif_tx_acquire(txq); \
- } \
- }
- #define HARD_TX_TRYLOCK(dev, txq) \
- (((dev->features & NETIF_F_LLTX) == 0) ? \
- __netif_tx_trylock(txq) : \
- __netif_tx_acquire(txq))
- #define HARD_TX_UNLOCK(dev, txq) { \
- if ((dev->features & NETIF_F_LLTX) == 0) { \
- __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();
- }
- 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);
- /* 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);
- 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);
- /* Functions used for device addresses handling */
- 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);
- void dev_addr_flush(struct net_device *dev);
- int dev_addr_init(struct net_device *dev);
- /* 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 - Synchonize 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 - Synchonize 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 __dev_set_rx_mode(struct net_device *dev);
- int dev_set_promiscuity(struct net_device *dev, int inc);
- int dev_set_allmulti(struct net_device *dev, int inc);
- void netdev_state_change(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);
- extern int netdev_max_backlog;
- extern int netdev_tstamp_prequeue;
- extern int weight_p;
- extern int dev_weight_rx_bias;
- extern int dev_weight_tx_bias;
- extern int dev_rx_weight;
- extern int dev_tx_weight;
- extern int gro_normal_batch;
- 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);
- struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
- struct list_head **iter);
- #ifdef CONFIG_LOCKDEP
- static LIST_HEAD(net_unlink_list);
- static inline void net_unlink_todo(struct net_device *dev)
- {
- if (list_empty(&dev->unlink_list))
- list_add_tail(&dev->unlink_list, &net_unlink_list);
- }
- #endif
- /* 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);
- /* RSS keys are 40 or 52 bytes long */
- #define NETDEV_RSS_KEY_LEN 52
- extern 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 sk_buff *__skb_gso_segment(struct sk_buff *skb,
- netdev_features_t features, bool tx_path);
- struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
- 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, const void *data);
- #else
- static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
- const void *data)
- {
- }
- #endif
- static inline
- struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
- {
- return __skb_gso_segment(skb, features, true);
- }
- __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_BUG
- void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
- #else
- static 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);
- #ifdef CONFIG_PROC_FS
- int __init dev_proc_init(void);
- #else
- #define dev_proc_init() 0
- #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)
- {
- __this_cpu_write(softnet_data.xmit.more, more);
- return ops->ndo_start_xmit(skb, dev);
- }
- static inline bool netdev_xmit_more(void)
- {
- return __this_cpu_read(softnet_data.xmit.more);
- }
- 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(txq);
- return rc;
- }
- int netdev_class_create_file_ns(const struct class_attribute *class_attr,
- const void *ns);
- void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
- const void *ns);
- extern const struct kobj_ns_type_operations net_ns_type_operations;
- const char *netdev_drivername(const struct net_device *dev);
- void linkwatch_run_queue(void);
- 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, 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 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);
- static inline bool net_gso_ok(netdev_features_t features, int gso_type)
- {
- netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
- /* 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));
- 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)));
- }
- static inline void netif_set_gso_max_size(struct net_device *dev,
- unsigned int size)
- {
- dev->gso_max_size = size;
- }
- static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
- int pulled_hlen, u16 mac_offset,
- int mac_len)
- {
- skb->protocol = protocol;
- skb->encapsulation = 1;
- skb_push(skb, pulled_hlen);
- skb_reset_transport_header(skb);
- skb->mac_header = mac_offset;
- skb->network_header = skb->mac_header + mac_len;
- skb->mac_len = mac_len;
- }
- 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 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_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);
- }
- static inline bool netif_is_rxfh_configured(const struct net_device *dev)
- {
- return dev->priv_flags & IFF_RXFH_CONFIGURED;
- }
- 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 dev->priv_flags & IFF_MACSEC;
- }
- 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 bool netdev_unregistering(const struct net_device *dev)
- {
- return dev->reg_state == NETREG_UNREGISTERING;
- }
- static inline const char *netdev_reg_state(const struct net_device *dev)
- {
- switch (dev->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, dev->reg_state);
- return " (unknown)";
- }
- __printf(3, 4) __cold
- void netdev_printk(const char *level, const struct net_device *dev,
- const char *format, ...);
- __printf(2, 3) __cold
- void netdev_emerg(const struct net_device *dev, const char *format, ...);
- __printf(2, 3) __cold
- void netdev_alert(const struct net_device *dev, const char *format, ...);
- __printf(2, 3) __cold
- void netdev_crit(const struct net_device *dev, const char *format, ...);
- __printf(2, 3) __cold
- void netdev_err(const struct net_device *dev, const char *format, ...);
- __printf(2, 3) __cold
- void netdev_warn(const struct net_device *dev, const char *format, ...);
- __printf(2, 3) __cold
- void netdev_notice(const struct net_device *dev, const char *format, ...);
- __printf(2, 3) __cold
- void netdev_info(const struct net_device *dev, const char *format, ...);
- #define netdev_level_once(level, dev, fmt, ...) \
- do { \
- static bool __print_once __read_mostly; \
- \
- if (!__print_once) { \
- __print_once = true; \
- netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
- } \
- } while (0)
- #define netdev_emerg_once(dev, fmt, ...) \
- netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
- #define netdev_alert_once(dev, fmt, ...) \
- netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
- #define netdev_crit_once(dev, fmt, ...) \
- netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
- #define netdev_err_once(dev, fmt, ...) \
- netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
- #define netdev_warn_once(dev, fmt, ...) \
- netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
- #define netdev_notice_once(dev, fmt, ...) \
- netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
- #define netdev_info_once(dev, fmt, ...) \
- netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
- #define MODULE_ALIAS_NETDEV(device) \
- MODULE_ALIAS("netdev-" device)
- #if defined(CONFIG_DYNAMIC_DEBUG) || \
- (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
- #define netdev_dbg(__dev, format, args...) \
- do { \
- dynamic_netdev_dbg(__dev, format, ##args); \
- } while (0)
- #elif defined(DEBUG)
- #define netdev_dbg(__dev, format, args...) \
- netdev_printk(KERN_DEBUG, __dev, format, ##args)
- #else
- #define netdev_dbg(__dev, format, args...) \
- ({ \
- if (0) \
- netdev_printk(KERN_DEBUG, __dev, format, ##args); \
- })
- #endif
- #if defined(VERBOSE_DEBUG)
- #define netdev_vdbg netdev_dbg
- #else
- #define netdev_vdbg(dev, format, args...) \
- ({ \
- if (0) \
- netdev_printk(KERN_DEBUG, dev, format, ##args); \
- 0; \
- })
- #endif
- /*
- * 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)
- /* netif printk helpers, similar to netdev_printk */
- #define netif_printk(priv, type, level, dev, fmt, args...) \
- do { \
- if (netif_msg_##type(priv)) \
- netdev_printk(level, (dev), fmt, ##args); \
- } while (0)
- #define netif_level(level, priv, type, dev, fmt, args...) \
- do { \
- if (netif_msg_##type(priv)) \
- netdev_##level(dev, fmt, ##args); \
- } while (0)
- #define netif_emerg(priv, type, dev, fmt, args...) \
- netif_level(emerg, priv, type, dev, fmt, ##args)
- #define netif_alert(priv, type, dev, fmt, args...) \
- netif_level(alert, priv, type, dev, fmt, ##args)
- #define netif_crit(priv, type, dev, fmt, args...) \
- netif_level(crit, priv, type, dev, fmt, ##args)
- #define netif_err(priv, type, dev, fmt, args...) \
- netif_level(err, priv, type, dev, fmt, ##args)
- #define netif_warn(priv, type, dev, fmt, args...) \
- netif_level(warn, priv, type, dev, fmt, ##args)
- #define netif_notice(priv, type, dev, fmt, args...) \
- netif_level(notice, priv, type, dev, fmt, ##args)
- #define netif_info(priv, type, dev, fmt, args...) \
- netif_level(info, priv, type, dev, fmt, ##args)
- #if defined(CONFIG_DYNAMIC_DEBUG) || \
- (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
- #define netif_dbg(priv, type, netdev, format, args...) \
- do { \
- if (netif_msg_##type(priv)) \
- dynamic_netdev_dbg(netdev, format, ##args); \
- } while (0)
- #elif defined(DEBUG)
- #define netif_dbg(priv, type, dev, format, args...) \
- netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
- #else
- #define netif_dbg(priv, type, dev, format, args...) \
- ({ \
- if (0) \
- netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
- 0; \
- })
- #endif
- /* if @cond then downgrade to debug, else print at @level */
- #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
- do { \
- if (cond) \
- netif_dbg(priv, type, netdev, fmt, ##args); \
- else \
- netif_ ## level(priv, type, netdev, fmt, ##args); \
- } while (0)
- #if defined(VERBOSE_DEBUG)
- #define netif_vdbg netif_dbg
- #else
- #define netif_vdbg(priv, type, dev, format, args...) \
- ({ \
- if (0) \
- netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
- 0; \
- })
- #endif
- /*
- * 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 net_device *blackhole_netdev;
- #endif /* _LINUX_NETDEVICE_H */
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