--- /dev/null
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * 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/dmaengine.h>
+#include <linux/workqueue.h>
+#include <linux/dynamic_queue_limits.h>
+
+#include <linux/ethtool.h>
+#include <net/net_namespace.h>
+#include <net/dsa.h>
+#ifdef CONFIG_DCB
+#include <net/dcbnl.h>
+#endif
+#include <net/netprio_cgroup.h>
+
+#include <linux/netdev_features.h>
+#include <linux/neighbour.h>
+#include <uapi/linux/netdevice.h>
+#include <uapi/linux/if_bonding.h>
+
+struct netpoll_info;
+struct device;
+struct phy_device;
+/* 802.11 specific */
+struct wireless_dev;
+/* 802.15.4 specific */
+struct wpan_dev;
+struct mpls_dev;
+
+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 */
+
+/*
+ * 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(), 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_POLICED 0x03 /* skb is shot by police */
+#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*/
+ NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
+};
+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_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 rps_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_SLAVE 3
+#define NETDEV_HW_ADDR_T_UNICAST 4
+#define NETDEV_HW_ADDR_T_MULTICAST 5
+ 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 {
+ u16 hh_len;
+ u16 __pad;
+ 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);
+};
+
+/* 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,
+};
+
+
+/*
+ * This structure holds at 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);
+
+/*
+ * 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;
+ unsigned int gro_count;
+ int (*poll)(struct napi_struct *, int);
+#ifdef CONFIG_NETPOLL
+ spinlock_t poll_lock;
+ int poll_owner;
+#endif
+ struct net_device *dev;
+ struct sk_buff *gro_list;
+ struct sk_buff *skb;
+ struct hrtimer timer;
+ struct list_head dev_list;
+ struct hlist_node napi_hash_node;
+ unsigned int napi_id;
+};
+
+enum {
+ NAPI_STATE_SCHED, /* Poll is scheduled */
+ NAPI_STATE_DISABLE, /* Disable pending */
+ NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
+ NAPI_STATE_HASHED, /* In NAPI hash */
+};
+
+enum gro_result {
+ GRO_MERGED,
+ GRO_MERGED_FREE,
+ GRO_HELD,
+ GRO_NORMAL,
+ GRO_DROP,
+};
+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, passe 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 to 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 ways.
+ *
+ * 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 consider 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 changed skb->dev, but want 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);
+}
+
+/**
+ * napi_schedule_prep - check if napi can be scheduled
+ * @n: napi context
+ *
+ * Test if NAPI routine is already running, and if not mark
+ * it as running. This is used as a condition variable
+ * insure only one NAPI poll instance runs. We also make
+ * sure there is no pending NAPI disable.
+ */
+static inline bool napi_schedule_prep(struct napi_struct *n)
+{
+ return !napi_disable_pending(n) &&
+ !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
+}
+
+/**
+ * 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;
+}
+
+void __napi_complete(struct napi_struct *n);
+void 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.
+ */
+static inline void napi_complete(struct napi_struct *n)
+{
+ return napi_complete_done(n, 0);
+}
+
+/**
+ * napi_by_id - lookup a NAPI by napi_id
+ * @napi_id: hashed napi_id
+ *
+ * lookup @napi_id in napi_hash table
+ * must be called under rcu_read_lock()
+ */
+struct napi_struct *napi_by_id(unsigned int napi_id);
+
+/**
+ * napi_hash_add - add a NAPI to global hashtable
+ * @napi: napi context
+ *
+ * generate a new napi_id and store a @napi under it in napi_hash
+ */
+void napi_hash_add(struct napi_struct *napi);
+
+/**
+ * napi_hash_del - remove a NAPI from global table
+ * @napi: napi context
+ *
+ * Warning: caller must observe rcu grace period
+ * before freeing memory containing @napi
+ */
+void napi_hash_del(struct napi_struct *napi);
+
+/**
+ * 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);
+}
+
+#ifdef CONFIG_SMP
+/**
+ * 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)
+{
+ while (test_bit(NAPI_STATE_SCHED, &n->state))
+ msleep(1);
+}
+#else
+# define napi_synchronize(n) barrier()
+#endif
+
+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
+/*
+ * write mostly part
+ */
+ spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
+ int xmit_lock_owner;
+ /*
+ * please use this field instead of dev->trans_start
+ */
+ unsigned long trans_start;
+
+ /*
+ * Number of TX timeouts for this queue
+ * (/sys/class/net/DEV/Q/trans_timeout)
+ */
+ unsigned long trans_timeout;
+
+ unsigned long state;
+
+#ifdef CONFIG_BQL
+ struct dql dql;
+#endif
+ unsigned long tx_maxrate;
+} ____cacheline_aligned_in_smp;
+
+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[0];
+};
+#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[0];
+};
+#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[0] ____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;
+} ____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,
+ struct rx_queue_attribute *attr, char *buf);
+ ssize_t (*store)(struct netdev_rx_queue *queue,
+ struct rx_queue_attribute *attr, 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[0];
+};
+#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
+#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - 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 *cpu_map[0];
+};
+#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
+ (nr_cpu_ids * 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;
+};
+
+typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
+ struct sk_buff *skb);
+
+/*
+ * 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 network device is registered.
+ * The network device can use this to any late stage initializaton
+ * or semantic validattion. It can fail with an error code which will
+ * be propogated 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 network device transistions to the up
+ * state.
+ *
+ * int (*ndo_stop)(struct net_device *dev);
+ * This function is called when network device transistions 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.
+ * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
+ * Required can not be NULL.
+ *
+ * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
+ * void *accel_priv, select_queue_fallback_t fallback);
+ * Called to decide which queue to 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 promiscious 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 to 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 request an ioctl which can't be handled by
+ * the generic interface code. If not defined ioctl's 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 reason, 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. If not defined, any request to change MTU will
+ * will return an error.
+ *
+ * void (*ndo_tx_timeout)(struct net_device *dev);
+ * Callback uses when the transmitter has not made any progress
+ * for dev->watchdog ticks.
+ *
+ * struct rtnl_link_stats64* (*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.
+ *
+ * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
+ * If device support 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 support 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);
+ * 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_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 adduce 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, u8 tc)
+ * Called to setup 'tc' number of traffic classes in the net device. 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.
+ *
+ * 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)
+ * 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)
+ * 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.
+ *
+ * void (*ndo_add_vxlan_port)(struct net_device *dev,
+ * sa_family_t sa_family, __be16 port);
+ * Called by vxlan to notiy a driver about the UDP port and socket
+ * address family that vxlan is listnening to. It is called only when
+ * a new port starts listening. The operation is protected by the
+ * vxlan_net->sock_lock.
+ *
+ * void (*ndo_del_vxlan_port)(struct net_device *dev,
+ * sa_family_t sa_family, __be16 port);
+ * Called by vxlan to notify the driver about a UDP port and socket
+ * address family that vxlan is not listening to anymore. The operation
+ * is protected by the vxlan_net->sock_lock.
+ *
+ * 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.
+ * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
+ * struct net_device *dev,
+ * void *priv);
+ * Callback to use for xmit over the accelerated station. This
+ * is used in place of ndo_start_xmit on accelerated net
+ * devices.
+ * 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.
+ * 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.
+ */
+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);
+ u16 (*ndo_select_queue)(struct net_device *dev,
+ struct sk_buff *skb,
+ void *accel_priv,
+ select_queue_fallback_t fallback);
+ 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);
+
+ struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
+ struct rtnl_link_stats64 *storage);
+ 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
+#ifdef CONFIG_NET_RX_BUSY_POLL
+ int (*ndo_busy_poll)(struct napi_struct *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);
+ 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_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[]);
+ int (*ndo_get_vf_port)(struct net_device *dev,
+ int vf, struct sk_buff *skb);
+ int (*ndo_set_vf_rss_query_en)(
+ struct net_device *dev,
+ int vf, bool setting);
+ int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
+#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);
+ int (*ndo_del_slave)(struct net_device *dev,
+ struct net_device *slave_dev);
+ 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 neighbour *n);
+ void (*ndo_neigh_destroy)(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);
+ 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_bridge_setlink)(struct net_device *dev,
+ struct nlmsghdr *nlh,
+ u16 flags);
+ 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_phys_port_name)(struct net_device *dev,
+ char *name, size_t len);
+ void (*ndo_add_vxlan_port)(struct net_device *dev,
+ sa_family_t sa_family,
+ __be16 port);
+ void (*ndo_del_vxlan_port)(struct net_device *dev,
+ sa_family_t sa_family,
+ __be16 port);
+
+ void* (*ndo_dfwd_add_station)(struct net_device *pdev,
+ struct net_device *dev);
+ void (*ndo_dfwd_del_station)(struct net_device *pdev,
+ void *priv);
+
+ netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb,
+ struct net_device *dev,
+ void *priv);
+ int (*ndo_get_lock_subclass)(struct net_device *dev);
+ netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features);
+ int (*ndo_set_tx_maxrate)(struct net_device *dev,
+ int queue_index,
+ u32 maxrate);
+ int (*ndo_get_iflink)(const struct net_device *dev);
+};
+
+/**
+ * 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_SLAVE_INACTIVE: bonding slave not the curr. active
+ * @IFF_MASTER_8023AD: bonding master, 802.3ad
+ * @IFF_MASTER_ALB: bonding master, balance-alb
+ * @IFF_BONDING: bonding master or slave
+ * @IFF_SLAVE_NEEDARP: need ARPs for validation
+ * @IFF_ISATAP: ISATAP interface (RFC4214)
+ * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
+ * @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
+ */
+enum netdev_priv_flags {
+ IFF_802_1Q_VLAN = 1<<0,
+ IFF_EBRIDGE = 1<<1,
+ IFF_SLAVE_INACTIVE = 1<<2,
+ IFF_MASTER_8023AD = 1<<3,
+ IFF_MASTER_ALB = 1<<4,
+ IFF_BONDING = 1<<5,
+ IFF_SLAVE_NEEDARP = 1<<6,
+ IFF_ISATAP = 1<<7,
+ IFF_MASTER_ARPMON = 1<<8,
+ IFF_WAN_HDLC = 1<<9,
+ IFF_XMIT_DST_RELEASE = 1<<10,
+ IFF_DONT_BRIDGE = 1<<11,
+ IFF_DISABLE_NETPOLL = 1<<12,
+ IFF_MACVLAN_PORT = 1<<13,
+ IFF_BRIDGE_PORT = 1<<14,
+ IFF_OVS_DATAPATH = 1<<15,
+ IFF_TX_SKB_SHARING = 1<<16,
+ IFF_UNICAST_FLT = 1<<17,
+ IFF_TEAM_PORT = 1<<18,
+ IFF_SUPP_NOFCS = 1<<19,
+ IFF_LIVE_ADDR_CHANGE = 1<<20,
+ IFF_MACVLAN = 1<<21,
+ IFF_XMIT_DST_RELEASE_PERM = 1<<22,
+ IFF_IPVLAN_MASTER = 1<<23,
+ IFF_IPVLAN_SLAVE = 1<<24,
+};
+
+#define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
+#define IFF_EBRIDGE IFF_EBRIDGE
+#define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE
+#define IFF_MASTER_8023AD IFF_MASTER_8023AD
+#define IFF_MASTER_ALB IFF_MASTER_ALB
+#define IFF_BONDING IFF_BONDING
+#define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP
+#define IFF_ISATAP IFF_ISATAP
+#define IFF_MASTER_ARPMON IFF_MASTER_ARPMON
+#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_IPVLAN_MASTER IFF_IPVLAN_MASTER
+#define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE
+
+/**
+ * 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_hlist: Device name hash chain, please keep it close to name[]
+ * @ifalias: SNMP alias
+ * @mem_end: Shared memory end
+ * @mem_start: Shared memory start
+ * @base_addr: Device I/O address
+ * @irq: Device IRQ number
+ *
+ * @carrier_changes: Stats to monitor carrier on<->off transitions
+ *
+ * @state: Generic network queuing layer state, see netdev_state_t
+ * @dev_list: The global list of network devices
+ * @napi_list: List entry, that is used for polling napi devices
+ * @unreg_list: List entry, that is used, when we are unregistering the
+ * device, see the function unregister_netdev
+ * @close_list: List entry, that is used, when we are closing the device
+ *
+ * @adj_list: Directly linked devices, like slaves for bonding
+ * @all_adj_list: All linked devices, *including* neighbours
+ * @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
+ *
+ * @ifindex: interface index
+ * @group: The group, that 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
+ *
+ * @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
+ * @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
+ * @type: Interface hardware type
+ * @hard_header_len: 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
+ * @neigh_priv_len; Used in neigh_alloc(),
+ * initialized only in atm/clip.c
+ * @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
+ * @uc_promisc: Counter, that indicates, that 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 from working in 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
+ *
+ * @last_rx: Time of last Rx
+ * @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
+ *
+ * @rx_handler: handler for received packets
+ * @rx_handler_data: XXX: need comments on this one
+ * @ingress_queue: XXX: need comments on this one
+ * @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
+ *
+ * @xps_maps: XXX: need comments on this one
+ *
+ * @trans_start: Time (in jiffies) of last Tx
+ * @watchdog_timeo: Represents the timeout that is used by
+ * the watchdog ( see dev_watchdog() )
+ * @watchdog_timer: List of timers
+ *
+ * @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
+ *
+ * @destructor: Called from unregister,
+ * can be used to call free_netdev
+ * @npinfo: XXX: need comments on this one
+ * @nd_net: Network namespace this network device is inside
+ *
+ * @ml_priv: Mid-layer private
+ * @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
+ * @gso_min_segs: Minimum 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
+ *
+ * @qdisc_tx_busylock: XXX: need comments on this one
+ *
+ * FIXME: cleanup struct net_device such that network protocol info
+ * moves out.
+ */
+
+struct net_device {
+ char name[IFNAMSIZ];
+ struct hlist_node name_hlist;
+ char *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;
+
+ atomic_t carrier_changes;
+
+ /*
+ * 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;
+
+ struct {
+ struct list_head upper;
+ struct list_head lower;
+ } all_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;
+
+ int ifindex;
+ int group;
+
+ struct net_device_stats stats;
+
+ atomic_long_t rx_dropped;
+ atomic_long_t tx_dropped;
+
+#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_SWITCHDEV
+ const struct swdev_ops *swdev_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;
+
+ unsigned int mtu;
+ unsigned short type;
+ unsigned short hard_header_len;
+
+ 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 short neigh_priv_len;
+ unsigned short dev_id;
+ unsigned short dev_port;
+ spinlock_t addr_list_lock;
+ unsigned char name_assign_type;
+ bool uc_promisc;
+ 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
+ unsigned int promiscuity;
+ unsigned int allmulti;
+
+
+ /* Protocol specific pointers */
+
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+ struct vlan_info __rcu *vlan_info;
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA)
+ struct dsa_switch_tree *dsa_ptr;
+#endif
+#if IS_ENABLED(CONFIG_TIPC)
+ struct tipc_bearer __rcu *tipc_ptr;
+#endif
+ void *atalk_ptr;
+ struct in_device __rcu *ip_ptr;
+ struct dn_dev __rcu *dn_ptr;
+ struct inet6_dev __rcu *ip6_ptr;
+ void *ax25_ptr;
+ 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())
+ */
+ unsigned long last_rx;
+
+ /* Interface address info used in eth_type_trans() */
+ unsigned char *dev_addr;
+
+
+#ifdef CONFIG_SYSFS
+ struct netdev_rx_queue *_rx;
+
+ unsigned int num_rx_queues;
+ unsigned int real_num_rx_queues;
+
+#endif
+
+ unsigned long gro_flush_timeout;
+ rx_handler_func_t __rcu *rx_handler;
+ void __rcu *rx_handler_data;
+
+ struct netdev_queue __rcu *ingress_queue;
+ 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 *qdisc;
+ unsigned long tx_queue_len;
+ spinlock_t tx_global_lock;
+ int watchdog_timeo;
+
+#ifdef CONFIG_XPS
+ struct xps_dev_maps __rcu *xps_maps;
+#endif
+
+ /* These may be needed for future network-power-down code. */
+
+ /*
+ * trans_start here is expensive for high speed devices on SMP,
+ * please use netdev_queue->trans_start instead.
+ */
+ unsigned long trans_start;
+
+ struct timer_list watchdog_timer;
+
+ int __percpu *pcpu_refcnt;
+ struct list_head todo_list;
+
+ 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;
+
+ void (*destructor)(struct net_device *dev);
+
+#ifdef CONFIG_NETPOLL
+ struct netpoll_info __rcu *npinfo;
+#endif
+
+ possible_net_t nd_net;
+
+ /* mid-layer private */
+ union {
+ void *ml_priv;
+ struct pcpu_lstats __percpu *lstats;
+ struct pcpu_sw_netstats __percpu *tstats;
+ struct pcpu_dstats __percpu *dstats;
+ struct pcpu_vstats __percpu *vstats;
+ };
+
+ struct garp_port __rcu *garp_port;
+ struct mrp_port __rcu *mrp_port;
+
+ 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;
+ u16 gso_min_segs;
+#ifdef CONFIG_DCB
+ const struct dcbnl_rtnl_ops *dcbnl_ops;
+#endif
+ u8 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 lock_class_key *qdisc_tx_busylock;
+};
+#define to_net_dev(d) container_of(d, struct net_device, dev)
+
+#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;
+}
+
+static inline
+void netdev_reset_tc(struct net_device *dev)
+{
+ dev->num_tc = 0;
+ memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
+ memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
+}
+
+static inline
+int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
+{
+ if (tc >= dev->num_tc)
+ return -EINVAL;
+
+ dev->tc_to_txq[tc].count = count;
+ dev->tc_to_txq[tc].offset = offset;
+ return 0;
+}
+
+static inline
+int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
+{
+ if (num_tc > TC_MAX_QUEUE)
+ return -EINVAL;
+
+ dev->num_tc = num_tc;
+ return 0;
+}
+
+static inline
+int netdev_get_num_tc(struct net_device *dev)
+{
+ return dev->num_tc;
+}
+
+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);
+}
+
+struct netdev_queue *netdev_pick_tx(struct net_device *dev,
+ struct sk_buff *skb,
+ void *accel_priv);
+
+/*
+ * 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);
+}
+
+static inline bool netdev_uses_dsa(struct net_device *dev)
+{
+#if IS_ENABLED(CONFIG_NET_DSA)
+ if (dev->dsa_ptr != NULL)
+ return dsa_uses_tagged_protocol(dev->dsa_ptr);
+#endif
+ return false;
+}
+
+/**
+ * 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, Wirelss 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_napi_del - remove a napi context
+ * @napi: napi context
+ *
+ * netif_napi_del() removes a napi context from the network device napi list
+ */
+void netif_napi_del(struct napi_struct *napi);
+
+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 udp_gro_receive */
+ u8 udp_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;
+
+ /* 7 bit hole */
+
+ /* 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)
+
+struct packet_type {
+ __be16 type; /* This is really htons(ether_type). */
+ struct net_device *dev; /* NULL is wildcarded here */
+ int (*func) (struct sk_buff *,
+ struct net_device *,
+ struct packet_type *,
+ struct net_device *);
+ bool (*id_match)(struct packet_type *ptype,
+ struct sock *sk);
+ void *af_packet_priv;
+ struct list_head list;
+};
+
+struct offload_callbacks {
+ struct sk_buff *(*gso_segment)(struct sk_buff *skb,
+ netdev_features_t features);
+ struct sk_buff **(*gro_receive)(struct sk_buff **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). */
+ struct offload_callbacks callbacks;
+ struct list_head list;
+};
+
+struct udp_offload;
+
+struct udp_offload_callbacks {
+ struct sk_buff **(*gro_receive)(struct sk_buff **head,
+ struct sk_buff *skb,
+ struct udp_offload *uoff);
+ int (*gro_complete)(struct sk_buff *skb,
+ int nhoff,
+ struct udp_offload *uoff);
+};
+
+struct udp_offload {
+ __be16 port;
+ u8 ipproto;
+ struct udp_offload_callbacks callbacks;
+};
+
+/* 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;
+};
+
+#define netdev_alloc_pcpu_stats(type) \
+({ \
+ typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
+ if (pcpu_stats) { \
+ int __cpu; \
+ for_each_possible_cpu(__cpu) { \
+ typeof(type) *stat; \
+ stat = per_cpu_ptr(pcpu_stats, __cpu); \
+ u64_stats_init(&stat->syncp); \
+ } \
+ } \
+ pcpu_stats; \
+})
+
+#include <linux/notifier.h>
+
+/* netdevice notifier chain. Please remember to update the rtnetlink
+ * notification exclusion list in rtnetlink_event() when adding new
+ * types.
+ */
+#define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
+#define NETDEV_DOWN 0x0002
+#define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
+ detected a hardware crash and restarted
+ - we can use this eg to kick tcp sessions
+ once done */
+#define NETDEV_CHANGE 0x0004 /* Notify device state change */
+#define NETDEV_REGISTER 0x0005
+#define NETDEV_UNREGISTER 0x0006
+#define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */
+#define NETDEV_CHANGEADDR 0x0008
+#define NETDEV_GOING_DOWN 0x0009
+#define NETDEV_CHANGENAME 0x000A
+#define NETDEV_FEAT_CHANGE 0x000B
+#define NETDEV_BONDING_FAILOVER 0x000C
+#define NETDEV_PRE_UP 0x000D
+#define NETDEV_PRE_TYPE_CHANGE 0x000E
+#define NETDEV_POST_TYPE_CHANGE 0x000F
+#define NETDEV_POST_INIT 0x0010
+#define NETDEV_UNREGISTER_FINAL 0x0011
+#define NETDEV_RELEASE 0x0012
+#define NETDEV_NOTIFY_PEERS 0x0013
+#define NETDEV_JOIN 0x0014
+#define NETDEV_CHANGEUPPER 0x0015
+#define NETDEV_RESEND_IGMP 0x0016
+#define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */
+#define NETDEV_CHANGEINFODATA 0x0018
+#define NETDEV_BONDING_INFO 0x0019
+
+int register_netdevice_notifier(struct notifier_block *nb);
+int unregister_netdevice_notifier(struct notifier_block *nb);
+
+struct netdev_notifier_info {
+ struct net_device *dev;
+};
+
+struct netdev_notifier_change_info {
+ struct netdev_notifier_info info; /* must be first */
+ unsigned int flags_changed;
+};
+
+static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
+ struct net_device *dev)
+{
+ info->dev = dev;
+}
+
+static inline struct net_device *
+netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
+{
+ return info->dev;
+}
+
+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_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);
+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);
+int dev_close(struct net_device *dev);
+int dev_close_many(struct list_head *head, bool unlink);
+void dev_disable_lro(struct net_device *dev);
+int dev_loopback_xmit(struct sock *sk, struct sk_buff *newskb);
+int dev_queue_xmit_sk(struct sock *sk, struct sk_buff *skb);
+static inline int dev_queue_xmit(struct sk_buff *skb)
+{
+ return dev_queue_xmit_sk(skb->sk, skb);
+}
+int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
+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);
+void synchronize_net(void);
+int init_dummy_netdev(struct net_device *dev);
+
+DECLARE_PER_CPU(int, xmit_recursion);
+static inline int dev_recursion_level(void)
+{
+ return this_cpu_read(xmit_recursion);
+}
+
+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);
+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 **head, 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_header_slow(struct sk_buff *skb, unsigned int hlen,
+ unsigned int offset)
+{
+ if (!pskb_may_pull(skb, hlen))
+ return NULL;
+
+ NAPI_GRO_CB(skb)->frag0 = NULL;
+ NAPI_GRO_CB(skb)->frag0_len = 0;
+ 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_headroom(skb) ==
+ 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_mark_checksum_bad(skb); \
+ else \
+ 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,
+ __sum16 check, __wsum pseudo)
+{
+ NAPI_GRO_CB(skb)->csum = ~pseudo;
+ NAPI_GRO_CB(skb)->csum_valid = 1;
+}
+
+#define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \
+do { \
+ if (__skb_gro_checksum_convert_check(skb)) \
+ __skb_gro_checksum_convert(skb, check, \
+ 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,
+ int start, int offset,
+ struct gro_remcsum *grc,
+ bool nopartial)
+{
+ __wsum delta;
+
+ BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
+
+ if (!nopartial) {
+ NAPI_GRO_CB(skb)->gro_remcsum_start =
+ ((unsigned char *)ptr + start) - skb->head;
+ return;
+ }
+
+ delta = remcsum_adjust(ptr, 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 = (ptr + offset) - (void *)skb->head;
+ grc->delta = delta;
+}
+
+static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
+ struct gro_remcsum *grc)
+{
+ if (!grc->delta)
+ return;
+
+ remcsum_unadjust((__sum16 *)(skb->head + grc->offset), grc->delta);
+}
+
+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);
+}
+
+typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
+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 cpu_collision;
+ 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_RPS
+ /* Elements below can be accessed between CPUs for RPS */
+ struct call_single_data csd ____cacheline_aligned_in_smp;
+ struct softnet_data *rps_ipi_next;
+ unsigned int cpu;
+ unsigned int input_queue_head;
+ unsigned int input_queue_tail;
+#endif
+ unsigned int dropped;
+ struct sk_buff_head input_pkt_queue;
+ struct napi_struct backlog;
+ struct sk_buff_head tofree_queue;
+
+};
+
+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);
+
+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 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 inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
+{
+ if (WARN_ON(!dev_queue)) {
+ pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
+ return;
+ }
+ 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));
+}
+
+static inline void netif_tx_stop_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_stop_queue(txq);
+ }
+}
+
+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
+}
+
+/**
+ * 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 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 (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));
+}
+
+void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
+
+#ifdef CONFIG_XPS
+int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
+ u16 index);
+#else
+static inline int netif_set_xps_queue(struct net_device *dev,
+ const struct cpumask *mask,
+ u16 index)
+{
+ return 0;
+}
+#endif
+
+/*
+ * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
+ * as a distribution range limit for the returned value.
+ */
+static inline u16 skb_tx_hash(const struct net_device *dev,
+ struct sk_buff *skb)
+{
+ return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
+}
+
+/**
+ * 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 rxq)
+{
+ return 0;
+}
+#endif
+
+#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);
+}
+
+int netif_rx(struct sk_buff *skb);
+int netif_rx_ni(struct sk_buff *skb);
+int netif_receive_skb_sk(struct sock *sk, struct sk_buff *skb);
+static inline int netif_receive_skb(struct sk_buff *skb)
+{
+ return netif_receive_skb_sk(skb->sk, skb);
+}
+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;
+}
+
+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);
+int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
+int dev_ethtool(struct net *net, struct ifreq *);
+unsigned int dev_get_flags(const struct net_device *);
+int __dev_change_flags(struct net_device *, unsigned int flags);
+int dev_change_flags(struct net_device *, unsigned int);
+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_change_net_namespace(struct net_device *, struct net *, const char *);
+int dev_set_mtu(struct net_device *, int);
+void dev_set_group(struct net_device *, int);
+int dev_set_mac_address(struct net_device *, struct sockaddr *);
+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);
+struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
+struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
+ struct netdev_queue *txq, int *ret);
+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(struct net_device *dev, struct sk_buff *skb);
+
+extern int netdev_budget;
+
+/* 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)
+{
+ 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)
+{
+ 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 carrier present
+ * @dev: network device
+ *
+ * Check if carrier is present on device
+ */
+static inline bool netif_dormant(const struct net_device *dev)
+{
+ return test_bit(__LINK_STATE_DORMANT, &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 = 0x0001,
+ NETIF_MSG_PROBE = 0x0002,
+ NETIF_MSG_LINK = 0x0004,
+ NETIF_MSG_TIMER = 0x0008,
+ NETIF_MSG_IFDOWN = 0x0010,
+ NETIF_MSG_IFUP = 0x0020,
+ NETIF_MSG_RX_ERR = 0x0040,
+ NETIF_MSG_TX_ERR = 0x0080,
+ NETIF_MSG_TX_QUEUED = 0x0100,
+ NETIF_MSG_INTR = 0x0200,
+ NETIF_MSG_TX_DONE = 0x0400,
+ NETIF_MSG_RX_STATUS = 0x0800,
+ NETIF_MSG_PKTDATA = 0x1000,
+ NETIF_MSG_HW = 0x2000,
+ NETIF_MSG_WOL = 0x4000,
+};
+
+#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 (1 << debug_value) - 1;
+}
+
+static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
+{
+ spin_lock(&txq->_xmit_lock);
+ txq->xmit_lock_owner = cpu;
+}
+
+static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
+{
+ spin_lock_bh(&txq->_xmit_lock);
+ 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))
+ txq->xmit_lock_owner = smp_processor_id();
+ return ok;
+}
+
+static inline void __netif_tx_unlock(struct netdev_queue *txq)
+{
+ txq->xmit_lock_owner = -1;
+ spin_unlock(&txq->_xmit_lock);
+}
+
+static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
+{
+ 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;
+}
+
+/**
+ * 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); \
+ } \
+}
+
+#define HARD_TX_TRYLOCK(dev, txq) \
+ (((dev->features & NETIF_F_LLTX) == 0) ? \
+ __netif_tx_trylock(txq) : \
+ true )
+
+#define HARD_TX_UNLOCK(dev, txq) { \
+ if ((dev->features & NETIF_F_LLTX) == 0) { \
+ __netif_tx_unlock(txq); \
+ } \
+}
+
+static inline void netif_tx_disable(struct net_device *dev)
+{
+ unsigned int i;
+ int cpu;
+
+ local_bh_disable();
+ cpu = smp_processor_id();
+ 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);
+ }
+ local_bh_enable();
+}
+
+static inline void netif_addr_lock(struct net_device *dev)
+{
+ spin_lock(&dev->addr_list_lock);
+}
+
+static inline void netif_addr_lock_nested(struct net_device *dev)
+{
+ int subclass = SINGLE_DEPTH_NESTING;
+
+ if (dev->netdev_ops->ndo_get_lock_subclass)
+ subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);
+
+ spin_lock_nested(&dev->addr_list_lock, subclass);
+}
+
+static inline void netif_addr_lock_bh(struct net_device *dev)
+{
+ spin_lock_bh(&dev->addr_list_lock);
+}
+
+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);
+
+/* 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 *));
+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);
+
+extern int netdev_max_backlog;
+extern int netdev_tstamp_prequeue;
+extern int weight_p;
+extern int bpf_jit_enable;
+
+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);
+
+/* 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)))
+
+/* iterate through upper list, must be called under RCU read lock */
+#define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
+ for (iter = &(dev)->all_adj_list.upper, \
+ updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
+ updev; \
+ updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
+
+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, \
+ ldev = netdev_lower_get_next(dev, &(iter)); \
+ ldev; \
+ ldev = netdev_lower_get_next(dev, &(iter)))
+
+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);
+int netdev_master_upper_dev_link(struct net_device *dev,
+ struct net_device *upper_dev);
+int netdev_master_upper_dev_link_private(struct net_device *dev,
+ struct net_device *upper_dev,
+ void *private);
+void netdev_upper_dev_unlink(struct net_device *dev,
+ struct net_device *upper_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);
+
+/* RSS keys are 40 or 52 bytes long */
+#define NETDEV_RSS_KEY_LEN 52
+extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
+void netdev_rss_key_fill(void *buffer, size_t len);
+
+int dev_get_nest_level(struct net_device *dev,
+ bool (*type_check)(struct net_device *dev));
+int skb_checksum_help(struct sk_buff *skb);
+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);
+
+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)
+{
+ return ((features & NETIF_F_GEN_CSUM) ||
+ ((features & NETIF_F_V4_CSUM) &&
+ protocol == htons(ETH_P_IP)) ||
+ ((features & NETIF_F_V6_CSUM) &&
+ protocol == htons(ETH_P_IPV6)) ||
+ ((features & NETIF_F_FCOE_CRC) &&
+ protocol == htons(ETH_P_FCOE)));
+}
+
+#ifdef CONFIG_BUG
+void netdev_rx_csum_fault(struct net_device *dev);
+#else
+static inline void netdev_rx_csum_fault(struct net_device *dev)
+{
+}
+#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)
+{
+ skb->xmit_more = more ? 1 : 0;
+ return ops->ndo_start_xmit(skb, dev);
+}
+
+static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
+ struct netdev_queue *txq, bool more)
+{
+ const struct net_device_ops *ops = dev->netdev_ops;
+ int 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(struct class_attribute *class_attr,
+ const void *ns);
+void netdev_class_remove_file_ns(struct class_attribute *class_attr,
+ const void *ns);
+
+static inline int netdev_class_create_file(struct class_attribute *class_attr)
+{
+ return netdev_class_create_file_ns(class_attr, NULL);
+}
+
+static inline void netdev_class_remove_file(struct class_attribute *class_attr)
+{
+ netdev_class_remove_file_ns(class_attr, NULL);
+}
+
+extern 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 & NETIF_F_GEN_CSUM)
+ f1 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
+ if (f2 & NETIF_F_GEN_CSUM)
+ f2 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
+ f1 &= f2;
+ if (f1 & NETIF_F_GEN_CSUM)
+ f1 &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
+
+ return f1;
+}
+
+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 = 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_UDP != (NETIF_F_UFO >> 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_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_IPIP != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT));
+ BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> 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_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> 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_macvlan(struct net_device *dev)
+{
+ return dev->priv_flags & IFF_MACVLAN;
+}
+
+static inline bool netif_is_macvlan_port(struct net_device *dev)
+{
+ return dev->priv_flags & IFF_MACVLAN_PORT;
+}
+
+static inline bool netif_is_ipvlan(struct net_device *dev)
+{
+ return dev->priv_flags & IFF_IPVLAN_SLAVE;
+}
+
+static inline bool netif_is_ipvlan_port(struct net_device *dev)
+{
+ return dev->priv_flags & IFF_IPVLAN_MASTER;
+}
+
+static inline bool netif_is_bond_master(struct net_device *dev)
+{
+ return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
+}
+
+static inline bool netif_is_bond_slave(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;
+}
+
+/* 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);
+}
+
+extern struct pernet_operations __net_initdata loopback_net_ops;
+
+/* Logging, debugging and troubleshooting/diagnostic helpers. */
+
+/* netdev_printk helpers, similar to dev_printk */
+
+static inline const char *netdev_name(const struct net_device *dev)
+{
+ if (!dev->name[0] || strchr(dev->name, '%'))
+ return "(unnamed net_device)";
+ return dev->name;
+}
+
+static inline const char *netdev_reg_state(const struct net_device *dev)
+{
+ 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)
+void netdev_printk(const char *level, const struct net_device *dev,
+ const char *format, ...);
+__printf(2, 3)
+void netdev_emerg(const struct net_device *dev, const char *format, ...);
+__printf(2, 3)
+void netdev_alert(const struct net_device *dev, const char *format, ...);
+__printf(2, 3)
+void netdev_crit(const struct net_device *dev, const char *format, ...);
+__printf(2, 3)
+void netdev_err(const struct net_device *dev, const char *format, ...);
+__printf(2, 3)
+void netdev_warn(const struct net_device *dev, const char *format, ...);
+__printf(2, 3)
+void netdev_notice(const struct net_device *dev, const char *format, ...);
+__printf(2, 3)
+void netdev_info(const struct net_device *dev, const char *format, ...);
+
+#define MODULE_ALIAS_NETDEV(device) \
+ MODULE_ALIAS("netdev-" device)
+
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#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\n" 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)
+#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 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.
+ *
+ * NOTE: That is no longer true with the addition of VLAN tags. Not
+ * sure which should go first, but I bet it won't make much
+ * difference if we are running VLANs. The good news is that
+ * this protocol won't be in the list unless compiled in, so
+ * the average user (w/out VLANs) will not be adversely affected.
+ * --BLG
+ *
+ * 0800 IP
+ * 8100 802.1Q VLAN
+ * 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)
+
+#endif /* _LINUX_NETDEVICE_H */
Code Review / kvmfornfv.git / blobdiff