| /* |
| * 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/workqueue.h> |
| #include <linux/dynamic_queue_limits.h> |
| |
| #include <linux/ethtool.h> |
| #include <net/net_namespace.h> |
| #ifdef CONFIG_DCB |
| #include <net/dcbnl.h> |
| #endif |
| #include <net/netprio_cgroup.h> |
| |
| #include <linux/netdev_features.h> |
| #include <linux/neighbour.h> |
| #include <uapi/linux/netdevice.h> |
| #include <uapi/linux/if_bonding.h> |
| #include <uapi/linux/pkt_cls.h> |
| #include <linux/hashtable.h> |
| |
| struct netpoll_info; |
| struct device; |
| struct phy_device; |
| struct dsa_switch_tree; |
| |
| /* 802.11 specific */ |
| struct wireless_dev; |
| /* 802.15.4 specific */ |
| struct wpan_dev; |
| struct mpls_dev; |
| /* UDP Tunnel offloads */ |
| struct udp_tunnel_info; |
| struct bpf_prog; |
| struct xdp_buff; |
| |
| 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(), and all |
| * others are propagated to higher layers. |
| */ |
| |
| /* qdisc ->enqueue() return codes. */ |
| #define NET_XMIT_SUCCESS 0x00 |
| #define NET_XMIT_DROP 0x01 /* skb dropped */ |
| #define NET_XMIT_CN 0x02 /* congestion notification */ |
| #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
| |
| /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
| * indicates that the device will soon be dropping packets, or already drops |
| * some packets of the same priority; prompting us to send less aggressively. */ |
| #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
| #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
| |
| /* Driver transmit return codes */ |
| #define NETDEV_TX_MASK 0xf0 |
| |
| enum netdev_tx { |
| __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
| NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
| NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ |
| }; |
| typedef enum netdev_tx netdev_tx_t; |
| |
| /* |
| * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; |
| * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. |
| */ |
| static inline bool dev_xmit_complete(int rc) |
| { |
| /* |
| * Positive cases with an skb consumed by a driver: |
| * - successful transmission (rc == NETDEV_TX_OK) |
| * - error while transmitting (rc < 0) |
| * - error while queueing to a different device (rc & NET_XMIT_MASK) |
| */ |
| if (likely(rc < NET_XMIT_MASK)) |
| return true; |
| |
| return false; |
| } |
| |
| /* |
| * Compute the worst-case header length according to the protocols |
| * used. |
| */ |
| |
| #if defined(CONFIG_HYPERV_NET) |
| # define LL_MAX_HEADER 128 |
| #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
| # if defined(CONFIG_MAC80211_MESH) |
| # define LL_MAX_HEADER 128 |
| # else |
| # define LL_MAX_HEADER 96 |
| # endif |
| #else |
| # define LL_MAX_HEADER 32 |
| #endif |
| |
| #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
| !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) |
| #define MAX_HEADER LL_MAX_HEADER |
| #else |
| #define MAX_HEADER (LL_MAX_HEADER + 48) |
| #endif |
| |
| /* |
| * Old network device statistics. Fields are native words |
| * (unsigned long) so they can be read and written atomically. |
| */ |
| |
| struct net_device_stats { |
| unsigned long rx_packets; |
| unsigned long tx_packets; |
| unsigned long rx_bytes; |
| unsigned long tx_bytes; |
| unsigned long rx_errors; |
| unsigned long tx_errors; |
| unsigned long rx_dropped; |
| unsigned long tx_dropped; |
| unsigned long multicast; |
| unsigned long collisions; |
| unsigned long rx_length_errors; |
| unsigned long rx_over_errors; |
| unsigned long rx_crc_errors; |
| unsigned long rx_frame_errors; |
| unsigned long rx_fifo_errors; |
| unsigned long rx_missed_errors; |
| unsigned long tx_aborted_errors; |
| unsigned long tx_carrier_errors; |
| unsigned long tx_fifo_errors; |
| unsigned long tx_heartbeat_errors; |
| unsigned long tx_window_errors; |
| unsigned long rx_compressed; |
| unsigned long tx_compressed; |
| }; |
| |
| |
| #include <linux/cache.h> |
| #include <linux/skbuff.h> |
| |
| #ifdef CONFIG_RPS |
| #include <linux/static_key.h> |
| extern struct static_key rps_needed; |
| extern struct static_key rfs_needed; |
| #endif |
| |
| struct neighbour; |
| struct neigh_parms; |
| struct sk_buff; |
| |
| struct netdev_hw_addr { |
| struct list_head list; |
| unsigned char addr[MAX_ADDR_LEN]; |
| unsigned char type; |
| #define NETDEV_HW_ADDR_T_LAN 1 |
| #define NETDEV_HW_ADDR_T_SAN 2 |
| #define NETDEV_HW_ADDR_T_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 { |
| unsigned int hh_len; |
| seqlock_t hh_lock; |
| |
| /* cached hardware header; allow for machine alignment needs. */ |
| #define HH_DATA_MOD 16 |
| #define HH_DATA_OFF(__len) \ |
| (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
| #define HH_DATA_ALIGN(__len) \ |
| (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
| unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
| }; |
| |
| /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. |
| * Alternative is: |
| * dev->hard_header_len ? (dev->hard_header_len + |
| * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
| * |
| * We could use other alignment values, but we must maintain the |
| * relationship HH alignment <= LL alignment. |
| */ |
| #define LL_RESERVED_SPACE(dev) \ |
| ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
| ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| |
| struct header_ops { |
| int (*create) (struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, const void *daddr, |
| const void *saddr, unsigned int len); |
| int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
| int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
| void (*cache_update)(struct hh_cache *hh, |
| const struct net_device *dev, |
| const unsigned char *haddr); |
| bool (*validate)(const char *ll_header, unsigned int len); |
| }; |
| |
| /* 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 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 |
| 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_MISSED, /* reschedule a napi */ |
| NAPI_STATE_DISABLE, /* Disable pending */ |
| NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
| NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */ |
| NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */ |
| NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */ |
| }; |
| |
| enum { |
| NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED), |
| NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED), |
| NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE), |
| NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC), |
| NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED), |
| NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL), |
| NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL), |
| }; |
| |
| enum gro_result { |
| GRO_MERGED, |
| GRO_MERGED_FREE, |
| GRO_HELD, |
| GRO_NORMAL, |
| GRO_DROP, |
| GRO_CONSUMED, |
| }; |
| typedef enum gro_result gro_result_t; |
| |
| /* |
| * enum rx_handler_result - Possible return values for rx_handlers. |
| * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it |
| * further. |
| * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in |
| * case skb->dev was changed by rx_handler. |
| * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. |
| * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. |
| * |
| * rx_handlers are functions called from inside __netif_receive_skb(), to do |
| * special processing of the skb, prior to delivery to protocol handlers. |
| * |
| * Currently, a net_device can only have a single rx_handler registered. Trying |
| * to register a second rx_handler will return -EBUSY. |
| * |
| * To register a rx_handler on a net_device, use netdev_rx_handler_register(). |
| * To unregister a rx_handler on a net_device, use |
| * netdev_rx_handler_unregister(). |
| * |
| * Upon return, rx_handler is expected to tell __netif_receive_skb() what to |
| * do with the skb. |
| * |
| * If the rx_handler consumed the skb in some way, it should return |
| * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
| * the skb to be delivered in some other way. |
| * |
| * If the rx_handler changed skb->dev, to divert the skb to another |
| * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the |
| * new device will be called if it exists. |
| * |
| * If the rx_handler decides the skb should be ignored, it should return |
| * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
| * are registered on exact device (ptype->dev == skb->dev). |
| * |
| * If the rx_handler didn't change skb->dev, but wants the skb to be normally |
| * delivered, it should return RX_HANDLER_PASS. |
| * |
| * A device without a registered rx_handler will behave as if rx_handler |
| * returned RX_HANDLER_PASS. |
| */ |
| |
| enum rx_handler_result { |
| RX_HANDLER_CONSUMED, |
| RX_HANDLER_ANOTHER, |
| RX_HANDLER_EXACT, |
| RX_HANDLER_PASS, |
| }; |
| typedef enum rx_handler_result rx_handler_result_t; |
| typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); |
| |
| void __napi_schedule(struct napi_struct *n); |
| void __napi_schedule_irqoff(struct napi_struct *n); |
| |
| static inline bool napi_disable_pending(struct napi_struct *n) |
| { |
| return test_bit(NAPI_STATE_DISABLE, &n->state); |
| } |
| |
| bool napi_schedule_prep(struct napi_struct *n); |
| |
| /** |
| * napi_schedule - schedule NAPI poll |
| * @n: NAPI context |
| * |
| * Schedule NAPI poll routine to be called if it is not already |
| * running. |
| */ |
| static inline void napi_schedule(struct napi_struct *n) |
| { |
| if (napi_schedule_prep(n)) |
| __napi_schedule(n); |
| } |
| |
| /** |
| * napi_schedule_irqoff - schedule NAPI poll |
| * @n: NAPI context |
| * |
| * Variant of napi_schedule(), assuming hard irqs are masked. |
| */ |
| static inline void napi_schedule_irqoff(struct napi_struct *n) |
| { |
| if (napi_schedule_prep(n)) |
| __napi_schedule_irqoff(n); |
| } |
| |
| /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
| static inline bool napi_reschedule(struct napi_struct *napi) |
| { |
| if (napi_schedule_prep(napi)) { |
| __napi_schedule(napi); |
| return true; |
| } |
| return false; |
| } |
| |
| bool napi_complete_done(struct napi_struct *n, int work_done); |
| /** |
| * napi_complete - NAPI processing complete |
| * @n: NAPI context |
| * |
| * Mark NAPI processing as complete. |
| * Consider using napi_complete_done() instead. |
| * Return false if device should avoid rearming interrupts. |
| */ |
| static inline bool napi_complete(struct napi_struct *n) |
| { |
| return napi_complete_done(n, 0); |
| } |
| |
| /** |
| * napi_hash_del - remove a NAPI from global table |
| * @napi: NAPI context |
| * |
| * Warning: caller must observe RCU grace period |
| * before freeing memory containing @napi, if |
| * this function returns true. |
| * Note: core networking stack automatically calls it |
| * from netif_napi_del(). |
| * Drivers might want to call this helper to combine all |
| * the needed RCU grace periods into a single one. |
| */ |
| bool 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); |
| clear_bit(NAPI_STATE_NPSVC, &n->state); |
| } |
| |
| /** |
| * napi_synchronize - wait until NAPI is not running |
| * @n: NAPI context |
| * |
| * Wait until NAPI is done being scheduled on this context. |
| * Waits till any outstanding processing completes but |
| * does not disable future activations. |
| */ |
| static inline void napi_synchronize(const struct napi_struct *n) |
| { |
| if (IS_ENABLED(CONFIG_SMP)) |
| while (test_bit(NAPI_STATE_SCHED, &n->state)) |
| msleep(1); |
| else |
| barrier(); |
| } |
| |
| enum netdev_queue_state_t { |
| __QUEUE_STATE_DRV_XOFF, |
| __QUEUE_STATE_STACK_XOFF, |
| __QUEUE_STATE_FROZEN, |
| }; |
| |
| #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) |
| #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) |
| #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) |
| |
| #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) |
| #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ |
| QUEUE_STATE_FROZEN) |
| #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ |
| QUEUE_STATE_FROZEN) |
| |
| /* |
| * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The |
| * netif_tx_* functions below are used to manipulate this flag. The |
| * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit |
| * queue independently. The netif_xmit_*stopped functions below are called |
| * to check if the queue has been stopped by the driver or stack (either |
| * of the XOFF bits are set in the state). Drivers should not need to call |
| * netif_xmit*stopped functions, they should only be using netif_tx_*. |
| */ |
| |
| struct netdev_queue { |
| /* |
| * read-mostly part |
| */ |
| struct net_device *dev; |
| struct Qdisc __rcu *qdisc; |
| struct Qdisc *qdisc_sleeping; |
| #ifdef CONFIG_SYSFS |
| struct kobject kobj; |
| #endif |
| #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| int numa_node; |
| #endif |
| unsigned long tx_maxrate; |
| /* |
| * Number of TX timeouts for this queue |
| * (/sys/class/net/DEV/Q/trans_timeout) |
| */ |
| unsigned long trans_timeout; |
| /* |
| * write-mostly part |
| */ |
| spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
| int xmit_lock_owner; |
| /* |
| * Time (in jiffies) of last Tx |
| */ |
| unsigned long trans_start; |
| |
| unsigned long state; |
| |
| #ifdef CONFIG_BQL |
| struct dql dql; |
| #endif |
| } ____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, char *buf); |
| ssize_t (*store)(struct netdev_rx_queue *queue, |
| const char *buf, size_t len); |
| }; |
| |
| #ifdef CONFIG_XPS |
| /* |
| * This structure holds an XPS map which can be of variable length. The |
| * map is an array of queues. |
| */ |
| struct xps_map { |
| unsigned int len; |
| unsigned int alloc_len; |
| struct rcu_head rcu; |
| u16 queues[0]; |
| }; |
| #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
| #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ |
| - sizeof(struct xps_map)) / sizeof(u16)) |
| |
| /* |
| * This structure holds all XPS maps for device. Maps are indexed by CPU. |
| */ |
| struct xps_dev_maps { |
| struct rcu_head rcu; |
| struct xps_map __rcu *cpu_map[0]; |
| }; |
| #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \ |
| (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *))) |
| #endif /* CONFIG_XPS */ |
| |
| #define TC_MAX_QUEUE 16 |
| #define TC_BITMASK 15 |
| /* HW offloaded queuing disciplines txq count and offset maps */ |
| struct netdev_tc_txq { |
| u16 count; |
| u16 offset; |
| }; |
| |
| #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| /* |
| * This structure is to hold information about the device |
| * configured to run FCoE protocol stack. |
| */ |
| struct netdev_fcoe_hbainfo { |
| char manufacturer[64]; |
| char serial_number[64]; |
| char hardware_version[64]; |
| char driver_version[64]; |
| char optionrom_version[64]; |
| char firmware_version[64]; |
| char model[256]; |
| char model_description[256]; |
| }; |
| #endif |
| |
| #define MAX_PHYS_ITEM_ID_LEN 32 |
| |
| /* This structure holds a unique identifier to identify some |
| * physical item (port for example) used by a netdevice. |
| */ |
| struct netdev_phys_item_id { |
| unsigned char id[MAX_PHYS_ITEM_ID_LEN]; |
| unsigned char id_len; |
| }; |
| |
| static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, |
| struct netdev_phys_item_id *b) |
| { |
| return a->id_len == b->id_len && |
| memcmp(a->id, b->id, a->id_len) == 0; |
| } |
| |
| typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
| struct sk_buff *skb); |
| |
| enum tc_setup_type { |
| TC_SETUP_MQPRIO, |
| TC_SETUP_CLSU32, |
| TC_SETUP_CLSFLOWER, |
| TC_SETUP_CLSMATCHALL, |
| TC_SETUP_CLSBPF, |
| }; |
| |
| /* These structures hold the attributes of xdp state that are being passed |
| * to the netdevice through the xdp op. |
| */ |
| enum xdp_netdev_command { |
| /* Set or clear a bpf program used in the earliest stages of packet |
| * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee |
| * is responsible for calling bpf_prog_put on any old progs that are |
| * stored. In case of error, the callee need not release the new prog |
| * reference, but on success it takes ownership and must bpf_prog_put |
| * when it is no longer used. |
| */ |
| XDP_SETUP_PROG, |
| XDP_SETUP_PROG_HW, |
| /* Check if a bpf program is set on the device. The callee should |
| * set @prog_attached to one of XDP_ATTACHED_* values, note that "true" |
| * is equivalent to XDP_ATTACHED_DRV. |
| */ |
| XDP_QUERY_PROG, |
| }; |
| |
| struct netlink_ext_ack; |
| |
| struct netdev_xdp { |
| enum xdp_netdev_command command; |
| union { |
| /* XDP_SETUP_PROG */ |
| struct { |
| u32 flags; |
| struct bpf_prog *prog; |
| struct netlink_ext_ack *extack; |
| }; |
| /* XDP_QUERY_PROG */ |
| struct { |
| u8 prog_attached; |
| u32 prog_id; |
| }; |
| }; |
| }; |
| |
| #ifdef CONFIG_XFRM_OFFLOAD |
| struct xfrmdev_ops { |
| int (*xdo_dev_state_add) (struct xfrm_state *x); |
| void (*xdo_dev_state_delete) (struct xfrm_state *x); |
| void (*xdo_dev_state_free) (struct xfrm_state *x); |
| bool (*xdo_dev_offload_ok) (struct sk_buff *skb, |
| struct xfrm_state *x); |
| }; |
| #endif |
| |
| /* |
| * This structure defines the management hooks for network devices. |
| * The following hooks can be defined; unless noted otherwise, they are |
| * optional and can be filled with a null pointer. |
| * |
| * int (*ndo_init)(struct net_device *dev); |
| * This function is called once when a network device is registered. |
| * The network device can use this for any late stage initialization |
| * or semantic validation. It can fail with an error code which will |
| * be propagated back to register_netdev. |
| * |
| * void (*ndo_uninit)(struct net_device *dev); |
| * This function is called when device is unregistered or when registration |
| * fails. It is not called if init fails. |
| * |
| * int (*ndo_open)(struct net_device *dev); |
| * This function is called when a network device transitions to the up |
| * state. |
| * |
| * int (*ndo_stop)(struct net_device *dev); |
| * This function is called when a network device transitions to the down |
| * state. |
| * |
| * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
| * struct net_device *dev); |
| * Called when a packet needs to be transmitted. |
| * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop |
| * the queue before that can happen; it's for obsolete devices and weird |
| * corner cases, but the stack really does a non-trivial amount |
| * of useless work if you return NETDEV_TX_BUSY. |
| * Required; cannot be NULL. |
| * |
| * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
| * struct net_device *dev |
| * netdev_features_t features); |
| * Called by core transmit path to determine if device is capable of |
| * performing offload operations on a given packet. This is to give |
| * the device an opportunity to implement any restrictions that cannot |
| * be otherwise expressed by feature flags. The check is called with |
| * the set of features that the stack has calculated and it returns |
| * those the driver believes to be appropriate. |
| * |
| * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
| * void *accel_priv, select_queue_fallback_t fallback); |
| * Called to decide which queue to use when device supports multiple |
| * transmit queues. |
| * |
| * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
| * This function is called to allow device receiver to make |
| * changes to configuration when multicast or promiscuous is enabled. |
| * |
| * void (*ndo_set_rx_mode)(struct net_device *dev); |
| * This function is called device changes address list filtering. |
| * If driver handles unicast address filtering, it should set |
| * IFF_UNICAST_FLT in its priv_flags. |
| * |
| * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); |
| * This function is called when the Media Access Control address |
| * needs to be changed. If this interface is not defined, the |
| * MAC address can not be changed. |
| * |
| * int (*ndo_validate_addr)(struct net_device *dev); |
| * Test if Media Access Control address is valid for the device. |
| * |
| * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); |
| * Called when a user requests an ioctl which can't be handled by |
| * the generic interface code. If not defined ioctls return |
| * not supported error code. |
| * |
| * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); |
| * Used to set network devices bus interface parameters. This interface |
| * is retained for legacy reasons; new devices should use the bus |
| * interface (PCI) for low level management. |
| * |
| * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); |
| * Called when a user wants to change the Maximum Transfer Unit |
| * of a device. |
| * |
| * void (*ndo_tx_timeout)(struct net_device *dev); |
| * Callback used when the transmitter has not made any progress |
| * for dev->watchdog ticks. |
| * |
| * void (*ndo_get_stats64)(struct net_device *dev, |
| * struct rtnl_link_stats64 *storage); |
| * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| * Called when a user wants to get the network device usage |
| * statistics. Drivers must do one of the following: |
| * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
| * rtnl_link_stats64 structure passed by the caller. |
| * 2. Define @ndo_get_stats to update a net_device_stats structure |
| * (which should normally be dev->stats) and return a pointer to |
| * it. The structure may be changed asynchronously only if each |
| * field is written atomically. |
| * 3. Update dev->stats asynchronously and atomically, and define |
| * neither operation. |
| * |
| * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id) |
| * Return true if this device supports offload stats of this attr_id. |
| * |
| * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, |
| * void *attr_data) |
| * Get statistics for offload operations by attr_id. Write it into the |
| * attr_data pointer. |
| * |
| * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); |
| * If device supports VLAN filtering this function is called when a |
| * VLAN id is registered. |
| * |
| * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); |
| * If device supports VLAN filtering this function is called when a |
| * VLAN id is unregistered. |
| * |
| * void (*ndo_poll_controller)(struct net_device *dev); |
| * |
| * SR-IOV management functions. |
| * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); |
| * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, |
| * u8 qos, __be16 proto); |
| * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, |
| * int max_tx_rate); |
| * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
| * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); |
| * int (*ndo_get_vf_config)(struct net_device *dev, |
| * int vf, struct ifla_vf_info *ivf); |
| * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
| * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
| * struct nlattr *port[]); |
| * |
| * Enable or disable the VF ability to query its RSS Redirection Table and |
| * Hash Key. This is needed since on some devices VF share this information |
| * with PF and querying it may introduce a theoretical security risk. |
| * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); |
| * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
| * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type, |
| * void *type_data); |
| * Called to setup any 'tc' scheduler, classifier or action on @dev. |
| * This is always called from the stack with the rtnl lock held and netif |
| * tx queues stopped. This allows the netdevice to perform queue |
| * management safely. |
| * |
| * Fiber Channel over Ethernet (FCoE) offload functions. |
| * int (*ndo_fcoe_enable)(struct net_device *dev); |
| * Called when the FCoE protocol stack wants to start using LLD for FCoE |
| * so the underlying device can perform whatever needed configuration or |
| * initialization to support acceleration of FCoE traffic. |
| * |
| * int (*ndo_fcoe_disable)(struct net_device *dev); |
| * Called when the FCoE protocol stack wants to stop using LLD for FCoE |
| * so the underlying device can perform whatever needed clean-ups to |
| * stop supporting acceleration of FCoE traffic. |
| * |
| * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, |
| * struct scatterlist *sgl, unsigned int sgc); |
| * Called when the FCoE Initiator wants to initialize an I/O that |
| * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| * perform necessary setup and returns 1 to indicate the device is set up |
| * successfully to perform DDP on this I/O, otherwise this returns 0. |
| * |
| * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); |
| * Called when the FCoE Initiator/Target is done with the DDPed I/O as |
| * indicated by the FC exchange id 'xid', so the underlying device can |
| * clean up and reuse resources for later DDP requests. |
| * |
| * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, |
| * struct scatterlist *sgl, unsigned int sgc); |
| * Called when the FCoE Target wants to initialize an I/O that |
| * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| * perform necessary setup and returns 1 to indicate the device is set up |
| * successfully to perform DDP on this I/O, otherwise this returns 0. |
| * |
| * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| * struct netdev_fcoe_hbainfo *hbainfo); |
| * Called when the FCoE Protocol stack wants information on the underlying |
| * device. This information is utilized by the FCoE protocol stack to |
| * register attributes with Fiber Channel management service as per the |
| * FC-GS Fabric Device Management Information(FDMI) specification. |
| * |
| * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
| * Called when the underlying device wants to override default World Wide |
| * Name (WWN) generation mechanism in FCoE protocol stack to pass its own |
| * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE |
| * protocol stack to use. |
| * |
| * RFS acceleration. |
| * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, |
| * u16 rxq_index, u32 flow_id); |
| * Set hardware filter for RFS. rxq_index is the target queue index; |
| * flow_id is a flow ID to be passed to rps_may_expire_flow() later. |
| * Return the filter ID on success, or a negative error code. |
| * |
| * Slave management functions (for bridge, bonding, etc). |
| * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
| * Called to make another netdev an underling. |
| * |
| * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); |
| * Called to release previously enslaved netdev. |
| * |
| * 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_udp_tunnel_add)(struct net_device *dev, |
| * struct udp_tunnel_info *ti); |
| * Called by UDP tunnel to notify a driver about the UDP port and socket |
| * address family that a UDP tunnel is listnening to. It is called only |
| * when a new port starts listening. The operation is protected by the |
| * RTNL. |
| * |
| * void (*ndo_udp_tunnel_del)(struct net_device *dev, |
| * struct udp_tunnel_info *ti); |
| * Called by UDP tunnel to notify the driver about a UDP port and socket |
| * address family that the UDP tunnel is not listening to anymore. The |
| * operation is protected by the RTNL. |
| * |
| * void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
| * struct net_device *dev) |
| * Called by upper layer devices to accelerate switching or other |
| * station functionality into hardware. 'pdev is the lowerdev |
| * to use for the offload and 'dev' is the net device that will |
| * back the offload. Returns a pointer to the private structure |
| * the upper layer will maintain. |
| * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) |
| * Called by upper layer device to delete the station created |
| * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing |
| * the station and priv is the structure returned by the add |
| * operation. |
| * int (*ndo_set_tx_maxrate)(struct net_device *dev, |
| * int queue_index, u32 maxrate); |
| * Called when a user wants to set a max-rate limitation of specific |
| * TX queue. |
| * int (*ndo_get_iflink)(const struct net_device *dev); |
| * Called to get the iflink value of this device. |
| * void (*ndo_change_proto_down)(struct net_device *dev, |
| * bool proto_down); |
| * This function is used to pass protocol port error state information |
| * to the switch driver. The switch driver can react to the proto_down |
| * by doing a phys down on the associated switch port. |
| * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); |
| * This function is used to get egress tunnel information for given skb. |
| * This is useful for retrieving outer tunnel header parameters while |
| * sampling packet. |
| * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); |
| * This function is used to specify the headroom that the skb must |
| * consider when allocation skb during packet reception. Setting |
| * appropriate rx headroom value allows avoiding skb head copy on |
| * forward. Setting a negative value resets the rx headroom to the |
| * default value. |
| * int (*ndo_xdp)(struct net_device *dev, struct netdev_xdp *xdp); |
| * This function is used to set or query state related to XDP on the |
| * netdevice. See definition of enum xdp_netdev_command for details. |
| * int (*ndo_xdp_xmit)(struct net_device *dev, struct xdp_buff *xdp); |
| * This function is used to submit a XDP packet for transmit on a |
| * netdevice. |
| * void (*ndo_xdp_flush)(struct net_device *dev); |
| * This function is used to inform the driver to flush a particular |
| * xdp tx queue. Must be called on same CPU as xdp_xmit. |
| */ |
| struct net_device_ops { |
| int (*ndo_init)(struct net_device *dev); |
| void (*ndo_uninit)(struct net_device *dev); |
| int (*ndo_open)(struct net_device *dev); |
| int (*ndo_stop)(struct net_device *dev); |
| netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
| struct net_device *dev); |
| netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
| struct net_device *dev, |
| netdev_features_t features); |
| u16 (*ndo_select_queue)(struct net_device *dev, |
| struct sk_buff *skb, |
| 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); |
| |
| void (*ndo_get_stats64)(struct net_device *dev, |
| struct rtnl_link_stats64 *storage); |
| bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id); |
| int (*ndo_get_offload_stats)(int attr_id, |
| const struct net_device *dev, |
| void *attr_data); |
| struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| |
| int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
| __be16 proto, u16 vid); |
| int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
| __be16 proto, u16 vid); |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| void (*ndo_poll_controller)(struct net_device *dev); |
| int (*ndo_netpoll_setup)(struct net_device *dev, |
| struct netpoll_info *info); |
| void (*ndo_netpoll_cleanup)(struct net_device *dev); |
| #endif |
| int (*ndo_set_vf_mac)(struct net_device *dev, |
| int queue, u8 *mac); |
| int (*ndo_set_vf_vlan)(struct net_device *dev, |
| int queue, u16 vlan, |
| u8 qos, __be16 proto); |
| int (*ndo_set_vf_rate)(struct net_device *dev, |
| int vf, int min_tx_rate, |
| int max_tx_rate); |
| int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
| int vf, bool setting); |
| int (*ndo_set_vf_trust)(struct net_device *dev, |
| int vf, bool setting); |
| int (*ndo_get_vf_config)(struct net_device *dev, |
| int vf, |
| struct ifla_vf_info *ivf); |
| int (*ndo_set_vf_link_state)(struct net_device *dev, |
| int vf, int link_state); |
| int (*ndo_get_vf_stats)(struct net_device *dev, |
| int vf, |
| struct ifla_vf_stats |
| *vf_stats); |
| int (*ndo_set_vf_port)(struct net_device *dev, |
| int vf, |
| struct nlattr *port[]); |
| int (*ndo_get_vf_port)(struct net_device *dev, |
| int vf, struct sk_buff *skb); |
| int (*ndo_set_vf_guid)(struct net_device *dev, |
| int vf, u64 guid, |
| int guid_type); |
| int (*ndo_set_vf_rss_query_en)( |
| struct net_device *dev, |
| int vf, bool setting); |
| int (*ndo_setup_tc)(struct net_device *dev, |
| enum tc_setup_type type, |
| void *type_data); |
| #if IS_ENABLED(CONFIG_FCOE) |
| int (*ndo_fcoe_enable)(struct net_device *dev); |
| int (*ndo_fcoe_disable)(struct net_device *dev); |
| int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
| u16 xid, |
| struct scatterlist *sgl, |
| unsigned int sgc); |
| int (*ndo_fcoe_ddp_done)(struct net_device *dev, |
| u16 xid); |
| int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
| u16 xid, |
| struct scatterlist *sgl, |
| unsigned int sgc); |
| int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| struct netdev_fcoe_hbainfo *hbainfo); |
| #endif |
| |
| #if IS_ENABLED(CONFIG_LIBFCOE) |
| #define NETDEV_FCOE_WWNN 0 |
| #define NETDEV_FCOE_WWPN 1 |
| int (*ndo_fcoe_get_wwn)(struct net_device *dev, |
| u64 *wwn, int type); |
| #endif |
| |
| #ifdef CONFIG_RFS_ACCEL |
| int (*ndo_rx_flow_steer)(struct net_device *dev, |
| const struct sk_buff *skb, |
| u16 rxq_index, |
| u32 flow_id); |
| #endif |
| int (*ndo_add_slave)(struct net_device *dev, |
| struct net_device *slave_dev); |
| 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 net_device *dev, |
| struct neighbour *n); |
| void (*ndo_neigh_destroy)(struct net_device *dev, |
| struct neighbour *n); |
| |
| int (*ndo_fdb_add)(struct ndmsg *ndm, |
| struct nlattr *tb[], |
| struct net_device *dev, |
| const unsigned char *addr, |
| u16 vid, |
| u16 flags); |
| 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_udp_tunnel_add)(struct net_device *dev, |
| struct udp_tunnel_info *ti); |
| void (*ndo_udp_tunnel_del)(struct net_device *dev, |
| struct udp_tunnel_info *ti); |
| void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
| struct net_device *dev); |
| void (*ndo_dfwd_del_station)(struct net_device *pdev, |
| void *priv); |
| |
| int (*ndo_get_lock_subclass)(struct net_device *dev); |
| int (*ndo_set_tx_maxrate)(struct net_device *dev, |
| int queue_index, |
| u32 maxrate); |
| int (*ndo_get_iflink)(const struct net_device *dev); |
| int (*ndo_change_proto_down)(struct net_device *dev, |
| bool proto_down); |
| int (*ndo_fill_metadata_dst)(struct net_device *dev, |
| struct sk_buff *skb); |
| void (*ndo_set_rx_headroom)(struct net_device *dev, |
| int needed_headroom); |
| int (*ndo_xdp)(struct net_device *dev, |
| struct netdev_xdp *xdp); |
| int (*ndo_xdp_xmit)(struct net_device *dev, |
| struct xdp_buff *xdp); |
| void (*ndo_xdp_flush)(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_BONDING: bonding master or slave |
| * @IFF_ISATAP: ISATAP interface (RFC4214) |
| * @IFF_WAN_HDLC: WAN HDLC device |
| * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to |
| * release skb->dst |
| * @IFF_DONT_BRIDGE: disallow bridging this ether dev |
| * @IFF_DISABLE_NETPOLL: disable netpoll at run-time |
| * @IFF_MACVLAN_PORT: device used as macvlan port |
| * @IFF_BRIDGE_PORT: device used as bridge port |
| * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port |
| * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit |
| * @IFF_UNICAST_FLT: Supports unicast filtering |
| * @IFF_TEAM_PORT: device used as team port |
| * @IFF_SUPP_NOFCS: device supports sending custom FCS |
| * @IFF_LIVE_ADDR_CHANGE: device supports hardware address |
| * change when it's running |
| * @IFF_MACVLAN: Macvlan device |
| * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account |
| * underlying stacked devices |
| * @IFF_IPVLAN_MASTER: IPvlan master device |
| * @IFF_IPVLAN_SLAVE: IPvlan slave device |
| * @IFF_L3MDEV_MASTER: device is an L3 master device |
| * @IFF_NO_QUEUE: device can run without qdisc attached |
| * @IFF_OPENVSWITCH: device is a Open vSwitch master |
| * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device |
| * @IFF_TEAM: device is a team device |
| * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured |
| * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external |
| * entity (i.e. the master device for bridged veth) |
| * @IFF_MACSEC: device is a MACsec device |
| * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device |
| */ |
| enum netdev_priv_flags { |
| IFF_802_1Q_VLAN = 1<<0, |
| IFF_EBRIDGE = 1<<1, |
| IFF_BONDING = 1<<2, |
| IFF_ISATAP = 1<<3, |
| IFF_WAN_HDLC = 1<<4, |
| IFF_XMIT_DST_RELEASE = 1<<5, |
| IFF_DONT_BRIDGE = 1<<6, |
| IFF_DISABLE_NETPOLL = 1<<7, |
| IFF_MACVLAN_PORT = 1<<8, |
| IFF_BRIDGE_PORT = 1<<9, |
| IFF_OVS_DATAPATH = 1<<10, |
| IFF_TX_SKB_SHARING = 1<<11, |
| IFF_UNICAST_FLT = 1<<12, |
| IFF_TEAM_PORT = 1<<13, |
| IFF_SUPP_NOFCS = 1<<14, |
| IFF_LIVE_ADDR_CHANGE = 1<<15, |
| IFF_MACVLAN = 1<<16, |
| IFF_XMIT_DST_RELEASE_PERM = 1<<17, |
| IFF_IPVLAN_MASTER = 1<<18, |
| IFF_IPVLAN_SLAVE = 1<<19, |
| IFF_L3MDEV_MASTER = 1<<20, |
| IFF_NO_QUEUE = 1<<21, |
| IFF_OPENVSWITCH = 1<<22, |
| IFF_L3MDEV_SLAVE = 1<<23, |
| IFF_TEAM = 1<<24, |
| IFF_RXFH_CONFIGURED = 1<<25, |
| IFF_PHONY_HEADROOM = 1<<26, |
| IFF_MACSEC = 1<<27, |
| IFF_L3MDEV_RX_HANDLER = 1<<28, |
| }; |
| |
| #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN |
| #define IFF_EBRIDGE IFF_EBRIDGE |
| #define IFF_BONDING IFF_BONDING |
| #define IFF_ISATAP IFF_ISATAP |
| #define IFF_WAN_HDLC IFF_WAN_HDLC |
| #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE |
| #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE |
| #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL |
| #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT |
| #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT |
| #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH |
| #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING |
| #define IFF_UNICAST_FLT IFF_UNICAST_FLT |
| #define IFF_TEAM_PORT IFF_TEAM_PORT |
| #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS |
| #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE |
| #define IFF_MACVLAN IFF_MACVLAN |
| #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM |
| #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER |
| #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE |
| #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER |
| #define IFF_NO_QUEUE IFF_NO_QUEUE |
| #define IFF_OPENVSWITCH IFF_OPENVSWITCH |
| #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE |
| #define IFF_TEAM IFF_TEAM |
| #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED |
| #define IFF_MACSEC IFF_MACSEC |
| #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER |
| |
| /** |
| * 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 used for polling NAPI devices |
| * @unreg_list: List entry when we are unregistering the |
| * device; see the function unregister_netdev |
| * @close_list: List entry used when we are closing the device |
| * @ptype_all: Device-specific packet handlers for all protocols |
| * @ptype_specific: Device-specific, protocol-specific packet handlers |
| * |
| * @adj_list: Directly linked devices, like slaves for bonding |
| * @features: Currently active device features |
| * @hw_features: User-changeable features |
| * |
| * @wanted_features: User-requested features |
| * @vlan_features: Mask of features inheritable by VLAN devices |
| * |
| * @hw_enc_features: Mask of features inherited by encapsulating devices |
| * This field indicates what encapsulation |
| * offloads the hardware is capable of doing, |
| * and drivers will need to set them appropriately. |
| * |
| * @mpls_features: Mask of features inheritable by MPLS |
| * |
| * @ifindex: interface index |
| * @group: The group the device belongs to |
| * |
| * @stats: Statistics struct, which was left as a legacy, use |
| * rtnl_link_stats64 instead |
| * |
| * @rx_dropped: Dropped packets by core network, |
| * do not use this in drivers |
| * @tx_dropped: Dropped packets by core network, |
| * do not use this in drivers |
| * @rx_nohandler: nohandler dropped packets by core network on |
| * inactive devices, do not use this in drivers |
| * |
| * @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 |
| * @ndisc_ops: Includes callbacks for different IPv6 neighbour |
| * discovery handling. Necessary for e.g. 6LoWPAN. |
| * @header_ops: Includes callbacks for creating,parsing,caching,etc |
| * of Layer 2 headers. |
| * |
| * @flags: Interface flags (a la BSD) |
| * @priv_flags: Like 'flags' but invisible to userspace, |
| * see if.h for the definitions |
| * @gflags: Global flags ( kept as legacy ) |
| * @padded: How much padding added by alloc_netdev() |
| * @operstate: RFC2863 operstate |
| * @link_mode: Mapping policy to operstate |
| * @if_port: Selectable AUI, TP, ... |
| * @dma: DMA channel |
| * @mtu: Interface MTU value |
| * @min_mtu: Interface Minimum MTU value |
| * @max_mtu: Interface Maximum MTU value |
| * @type: Interface hardware type |
| * @hard_header_len: Maximum hardware header length. |
| * @min_header_len: Minimum hardware header length |
| * |
| * @needed_headroom: Extra headroom the hardware may need, but not in all |
| * cases can this be guaranteed |
| * @needed_tailroom: Extra tailroom the hardware may need, but not in all |
| * cases can this be guaranteed. Some cases also use |
| * LL_MAX_HEADER instead to allocate the skb |
| * |
| * interface address info: |
| * |
| * @perm_addr: Permanent hw address |
| * @addr_assign_type: Hw address assignment type |
| * @addr_len: Hardware address length |
| * @neigh_priv_len: Used in neigh_alloc() |
| * @dev_id: Used to differentiate devices that share |
| * the same link layer address |
| * @dev_port: Used to differentiate devices that share |
| * the same function |
| * @addr_list_lock: XXX: need comments on this one |
| * @uc_promisc: Counter that indicates promiscuous mode |
| * has been enabled due to the need to listen to |
| * additional unicast addresses in a device that |
| * does not implement ndo_set_rx_mode() |
| * @uc: unicast mac addresses |
| * @mc: multicast mac addresses |
| * @dev_addrs: list of device hw addresses |
| * @queues_kset: Group of all Kobjects in the Tx and RX queues |
| * @promiscuity: Number of times the NIC is told to work in |
| * promiscuous mode; if it becomes 0 the NIC will |
| * exit promiscuous mode |
| * @allmulti: Counter, enables or disables allmulticast mode |
| * |
| * @vlan_info: VLAN info |
| * @dsa_ptr: dsa specific data |
| * @tipc_ptr: TIPC specific data |
| * @atalk_ptr: AppleTalk link |
| * @ip_ptr: IPv4 specific data |
| * @dn_ptr: DECnet specific data |
| * @ip6_ptr: IPv6 specific data |
| * @ax25_ptr: AX.25 specific data |
| * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering |
| * |
| * @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 |
| * |
| * @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 |
| * |
| * @needs_free_netdev: Should unregister perform free_netdev? |
| * @priv_destructor: Called from unregister |
| * @npinfo: XXX: need comments on this one |
| * @nd_net: Network namespace this network device is inside |
| * |
| * @ml_priv: Mid-layer private |
| * @lstats: Loopback statistics |
| * @tstats: Tunnel statistics |
| * @dstats: Dummy statistics |
| * @vstats: Virtual ethernet statistics |
| * |
| * @garp_port: GARP |
| * @mrp_port: MRP |
| * |
| * @dev: Class/net/name entry |
| * @sysfs_groups: Space for optional device, statistics and wireless |
| * sysfs groups |
| * |
| * @sysfs_rx_queue_group: Space for optional per-rx queue attributes |
| * @rtnl_link_ops: Rtnl_link_ops |
| * |
| * @gso_max_size: Maximum size of generic segmentation offload |
| * @gso_max_segs: Maximum number of segments that can be passed to the |
| * NIC for GSO |
| * |
| * @dcbnl_ops: Data Center Bridging netlink ops |
| * @num_tc: Number of traffic classes in the net device |
| * @tc_to_txq: XXX: need comments on this one |
| * @prio_tc_map: XXX: need comments on this one |
| * |
| * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp |
| * |
| * @priomap: XXX: need comments on this one |
| * @phydev: Physical device may attach itself |
| * for hardware timestamping |
| * |
| * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock |
| * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount |
| * |
| * @proto_down: protocol port state information can be sent to the |
| * switch driver and used to set the phys state of the |
| * switch port. |
| * |
| * 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; |
| |
| netdev_features_t features; |
| netdev_features_t hw_features; |
| netdev_features_t wanted_features; |
| netdev_features_t vlan_features; |
| netdev_features_t hw_enc_features; |
| netdev_features_t mpls_features; |
| netdev_features_t gso_partial_features; |
| |
| int ifindex; |
| int group; |
| |
| struct net_device_stats stats; |
| |
| atomic_long_t rx_dropped; |
| atomic_long_t tx_dropped; |
| atomic_long_t rx_nohandler; |
| |
| #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 switchdev_ops *switchdev_ops; |
| #endif |
| #ifdef CONFIG_NET_L3_MASTER_DEV |
| const struct l3mdev_ops *l3mdev_ops; |
| #endif |
| #if IS_ENABLED(CONFIG_IPV6) |
| const struct ndisc_ops *ndisc_ops; |
| #endif |
| |
| #ifdef CONFIG_XFRM |
| const struct xfrmdev_ops *xfrmdev_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 int min_mtu; |
| unsigned int max_mtu; |
| unsigned short type; |
| unsigned short hard_header_len; |
| unsigned char min_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()) |
| */ |
| /* 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 |
| |
| struct bpf_prog __rcu *xdp_prog; |
| unsigned long gro_flush_timeout; |
| rx_handler_func_t __rcu *rx_handler; |
| void __rcu *rx_handler_data; |
| |
| #ifdef CONFIG_NET_CLS_ACT |
| struct tcf_proto __rcu *ingress_cl_list; |
| #endif |
| struct netdev_queue __rcu *ingress_queue; |
| #ifdef CONFIG_NETFILTER_INGRESS |
| struct nf_hook_entries __rcu *nf_hooks_ingress; |
| #endif |
| |
| unsigned char broadcast[MAX_ADDR_LEN]; |
| #ifdef CONFIG_RFS_ACCEL |
| struct cpu_rmap *rx_cpu_rmap; |
| #endif |
| struct hlist_node index_hlist; |
| |
| /* |
| * Cache lines mostly used on transmit path |
| */ |
| struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
| unsigned int num_tx_queues; |
| unsigned int real_num_tx_queues; |
| struct Qdisc *qdisc; |
| #ifdef CONFIG_NET_SCHED |
| DECLARE_HASHTABLE (qdisc_hash, 4); |
| #endif |
| unsigned int tx_queue_len; |
| spinlock_t tx_global_lock; |
| int watchdog_timeo; |
| |
| #ifdef CONFIG_XPS |
| struct xps_dev_maps __rcu *xps_maps; |
| #endif |
| #ifdef CONFIG_NET_CLS_ACT |
| struct tcf_proto __rcu *egress_cl_list; |
| #endif |
| |
| /* These may be needed for future network-power-down code. */ |
| 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; |
| |
| bool needs_free_netdev; |
| void (*priv_destructor)(struct net_device *dev); |
| |
| #ifdef CONFIG_NETPOLL |
| struct netpoll_info __rcu *npinfo; |
| #endif |
| |
| possible_net_t nd_net; |
| |
| /* mid-layer private */ |
| 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; |
| }; |
| |
| #if IS_ENABLED(CONFIG_GARP) |
| struct garp_port __rcu *garp_port; |
| #endif |
| #if IS_ENABLED(CONFIG_MRP) |
| struct mrp_port __rcu *mrp_port; |
| #endif |
| |
| struct device dev; |
| const struct attribute_group *sysfs_groups[4]; |
| const struct attribute_group *sysfs_rx_queue_group; |
| |
| const struct rtnl_link_ops *rtnl_link_ops; |
| |
| /* for setting kernel sock attribute on TCP connection setup */ |
| #define GSO_MAX_SIZE 65536 |
| unsigned int gso_max_size; |
| #define GSO_MAX_SEGS 65535 |
| u16 gso_max_segs; |
| |
| #ifdef CONFIG_DCB |
| const struct dcbnl_rtnl_ops *dcbnl_ops; |
| #endif |
| 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; |
| struct lock_class_key *qdisc_running_key; |
| bool proto_down; |
| }; |
| #define to_net_dev(d) container_of(d, struct net_device, dev) |
| |
| static inline bool netif_elide_gro(const struct net_device *dev) |
| { |
| if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog) |
| return true; |
| return false; |
| } |
| |
| #define NETDEV_ALIGN 32 |
| |
| static inline |
| int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) |
| { |
| return dev->prio_tc_map[prio & TC_BITMASK]; |
| } |
| |
| static inline |
| int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) |
| { |
| if (tc >= dev->num_tc) |
| return -EINVAL; |
| |
| dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; |
| return 0; |
| } |
| |
| int netdev_txq_to_tc(struct net_device *dev, unsigned int txq); |
| void netdev_reset_tc(struct net_device *dev); |
| int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset); |
| int netdev_set_num_tc(struct net_device *dev, u8 num_tc); |
| |
| static inline |
| int netdev_get_num_tc(struct net_device *dev) |
| { |
| return dev->num_tc; |
| } |
| |
| static inline |
| struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, |
| unsigned int index) |
| { |
| return &dev->_tx[index]; |
| } |
| |
| static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, |
| const struct sk_buff *skb) |
| { |
| return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); |
| } |
| |
| static inline void netdev_for_each_tx_queue(struct net_device *dev, |
| void (*f)(struct net_device *, |
| struct netdev_queue *, |
| void *), |
| void *arg) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) |
| f(dev, &dev->_tx[i], arg); |
| } |
| |
| #define netdev_lockdep_set_classes(dev) \ |
| { \ |
| static struct lock_class_key qdisc_tx_busylock_key; \ |
| static struct lock_class_key qdisc_running_key; \ |
| static struct lock_class_key qdisc_xmit_lock_key; \ |
| static struct lock_class_key dev_addr_list_lock_key; \ |
| unsigned int i; \ |
| \ |
| (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \ |
| (dev)->qdisc_running_key = &qdisc_running_key; \ |
| lockdep_set_class(&(dev)->addr_list_lock, \ |
| &dev_addr_list_lock_key); \ |
| for (i = 0; i < (dev)->num_tx_queues; i++) \ |
| lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \ |
| &qdisc_xmit_lock_key); \ |
| } |
| |
| struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
| struct sk_buff *skb, |
| void *accel_priv); |
| |
| /* returns the headroom that the master device needs to take in account |
| * when forwarding to this dev |
| */ |
| static inline unsigned netdev_get_fwd_headroom(struct net_device *dev) |
| { |
| return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom; |
| } |
| |
| static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr) |
| { |
| if (dev->netdev_ops->ndo_set_rx_headroom) |
| dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr); |
| } |
| |
| /* set the device rx headroom to the dev's default */ |
| static inline void netdev_reset_rx_headroom(struct net_device *dev) |
| { |
| netdev_set_rx_headroom(dev, -1); |
| } |
| |
| /* |
| * Net namespace inlines |
| */ |
| static inline |
| struct net *dev_net(const struct net_device *dev) |
| { |
| return read_pnet(&dev->nd_net); |
| } |
| |
| static inline |
| void dev_net_set(struct net_device *dev, struct net *net) |
| { |
| write_pnet(&dev->nd_net, net); |
| } |
| |
| /** |
| * netdev_priv - access network device private data |
| * @dev: network device |
| * |
| * Get network device private data |
| */ |
| static inline void *netdev_priv(const struct net_device *dev) |
| { |
| return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
| } |
| |
| /* Set the sysfs physical device reference for the network logical device |
| * if set prior to registration will cause a symlink during initialization. |
| */ |
| #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
| |
| /* Set the sysfs device type for the network logical device to allow |
| * fine-grained identification of different network device types. For |
| * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. |
| */ |
| #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) |
| |
| /* Default NAPI poll() weight |
| * Device drivers are strongly advised to not use bigger value |
| */ |
| #define NAPI_POLL_WEIGHT 64 |
| |
| /** |
| * netif_napi_add - initialize a NAPI context |
| * @dev: network device |
| * @napi: NAPI context |
| * @poll: polling function |
| * @weight: default weight |
| * |
| * netif_napi_add() must be used to initialize a NAPI context prior to calling |
| * *any* of the other NAPI-related functions. |
| */ |
| void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
| int (*poll)(struct napi_struct *, int), int weight); |
| |
| /** |
| * netif_tx_napi_add - initialize a NAPI context |
| * @dev: network device |
| * @napi: NAPI context |
| * @poll: polling function |
| * @weight: default weight |
| * |
| * This variant of netif_napi_add() should be used from drivers using NAPI |
| * to exclusively poll a TX queue. |
| * This will avoid we add it into napi_hash[], thus polluting this hash table. |
| */ |
| static inline void netif_tx_napi_add(struct net_device *dev, |
| struct napi_struct *napi, |
| int (*poll)(struct napi_struct *, int), |
| int weight) |
| { |
| set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); |
| netif_napi_add(dev, napi, poll, weight); |
| } |
| |
| /** |
| * netif_napi_del - remove a NAPI context |
| * @napi: NAPI context |
| * |
| * 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 tunnel GRO receive */ |
| u8 encap_mark:1; |
| |
| /* GRO checksum is valid */ |
| u8 csum_valid:1; |
| |
| /* Number of checksums via CHECKSUM_UNNECESSARY */ |
| u8 csum_cnt:3; |
| |
| /* Free the skb? */ |
| u8 free:2; |
| #define NAPI_GRO_FREE 1 |
| #define NAPI_GRO_FREE_STOLEN_HEAD 2 |
| |
| /* Used in foo-over-udp, set in udp[46]_gro_receive */ |
| u8 is_ipv6:1; |
| |
| /* Used in GRE, set in fou/gue_gro_receive */ |
| u8 is_fou:1; |
| |
| /* Used to determine if flush_id can be ignored */ |
| u8 is_atomic:1; |
| |
| /* Number of gro_receive callbacks this packet already went through */ |
| u8 recursion_counter:4; |
| |
| /* 1 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) |
| |
| #define GRO_RECURSION_LIMIT 15 |
| static inline int gro_recursion_inc_test(struct sk_buff *skb) |
| { |
| return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT; |
| } |
| |
| typedef struct sk_buff **(*gro_receive_t)(struct sk_buff **, struct sk_buff *); |
| static inline struct sk_buff **call_gro_receive(gro_receive_t cb, |
| struct sk_buff **head, |
| struct sk_buff *skb) |
| { |
| if (unlikely(gro_recursion_inc_test(skb))) { |
| NAPI_GRO_CB(skb)->flush |= 1; |
| return NULL; |
| } |
| |
| return cb(head, skb); |
| } |
| |
| typedef struct sk_buff **(*gro_receive_sk_t)(struct sock *, struct sk_buff **, |
| struct sk_buff *); |
| static inline struct sk_buff **call_gro_receive_sk(gro_receive_sk_t cb, |
| struct sock *sk, |
| struct sk_buff **head, |
| struct sk_buff *skb) |
| { |
| if (unlikely(gro_recursion_inc_test(skb))) { |
| NAPI_GRO_CB(skb)->flush |= 1; |
| return NULL; |
| } |
| |
| return cb(sk, head, skb); |
| } |
| |
| struct packet_type { |
| __be16 type; /* This is really htons(ether_type). */ |
| 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). */ |
| u16 priority; |
| struct offload_callbacks callbacks; |
| struct list_head list; |
| }; |
| |
| /* often modified stats are per-CPU, other are shared (netdev->stats) */ |
| struct pcpu_sw_netstats { |
| u64 rx_packets; |
| u64 rx_bytes; |
| u64 tx_packets; |
| u64 tx_bytes; |
| struct u64_stats_sync syncp; |
| }; |
| |
| #define __netdev_alloc_pcpu_stats(type, gfp) \ |
| ({ \ |
| typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ |
| if (pcpu_stats) { \ |
| int __cpu; \ |
| for_each_possible_cpu(__cpu) { \ |
| typeof(type) *stat; \ |
| stat = per_cpu_ptr(pcpu_stats, __cpu); \ |
| u64_stats_init(&stat->syncp); \ |
| } \ |
| } \ |
| pcpu_stats; \ |
| }) |
| |
| #define netdev_alloc_pcpu_stats(type) \ |
| __netdev_alloc_pcpu_stats(type, GFP_KERNEL) |
| |
| enum netdev_lag_tx_type { |
| NETDEV_LAG_TX_TYPE_UNKNOWN, |
| NETDEV_LAG_TX_TYPE_RANDOM, |
| NETDEV_LAG_TX_TYPE_BROADCAST, |
| NETDEV_LAG_TX_TYPE_ROUNDROBIN, |
| NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, |
| NETDEV_LAG_TX_TYPE_HASH, |
| }; |
| |
| struct netdev_lag_upper_info { |
| enum netdev_lag_tx_type tx_type; |
| }; |
| |
| struct netdev_lag_lower_state_info { |
| u8 link_up : 1, |
| tx_enabled : 1; |
| }; |
| |
| #include <linux/notifier.h> |
| |
| /* netdevice notifier chain. Please remember to update 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 |
| #define NETDEV_PRECHANGEUPPER 0x001A |
| #define NETDEV_CHANGELOWERSTATE 0x001B |
| #define NETDEV_UDP_TUNNEL_PUSH_INFO 0x001C |
| #define NETDEV_UDP_TUNNEL_DROP_INFO 0x001D |
| #define NETDEV_CHANGE_TX_QUEUE_LEN 0x001E |
| |
| 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_info_ext { |
| struct netdev_notifier_info info; /* must be first */ |
| union { |
| u32 mtu; |
| } ext; |
| }; |
| |
| struct netdev_notifier_change_info { |
| struct netdev_notifier_info info; /* must be first */ |
| unsigned int flags_changed; |
| }; |
| |
| struct netdev_notifier_changeupper_info { |
| struct netdev_notifier_info info; /* must be first */ |
| struct net_device *upper_dev; /* new upper dev */ |
| bool master; /* is upper dev master */ |
| bool linking; /* is the notification for link or unlink */ |
| void *upper_info; /* upper dev info */ |
| }; |
| |
| struct netdev_notifier_changelowerstate_info { |
| struct netdev_notifier_info info; /* must be first */ |
| void *lower_state_info; /* is lower dev state */ |
| }; |
| |
| 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); |
| int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); |
| struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags, |
| unsigned short mask); |
| struct net_device *dev_get_by_name(struct net *net, const char *name); |
| struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
| struct net_device *__dev_get_by_name(struct net *net, const char *name); |
| int dev_alloc_name(struct net_device *dev, const char *name); |
| int dev_open(struct net_device *dev); |
| void dev_close(struct net_device *dev); |
| void dev_close_many(struct list_head *head, bool unlink); |
| void dev_disable_lro(struct net_device *dev); |
| int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); |
| int dev_queue_xmit(struct sk_buff *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); |
| #define XMIT_RECURSION_LIMIT 10 |
| |
| 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); |
| struct net_device *dev_get_by_napi_id(unsigned int napi_id); |
| int netdev_get_name(struct net *net, char *name, int ifindex); |
| int dev_restart(struct net_device *dev); |
| int skb_gro_receive(struct sk_buff **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_frag0_invalidate(struct sk_buff *skb) |
| { |
| NAPI_GRO_CB(skb)->frag0 = NULL; |
| NAPI_GRO_CB(skb)->frag0_len = 0; |
| } |
| |
| static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
| unsigned int offset) |
| { |
| if (!pskb_may_pull(skb, hlen)) |
| return NULL; |
| |
| skb_gro_frag0_invalidate(skb); |
| return skb->data + offset; |
| } |
| |
| static inline void *skb_gro_network_header(struct sk_buff *skb) |
| { |
| return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
| skb_network_offset(skb); |
| } |
| |
| static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
| const void *start, unsigned int len) |
| { |
| if (NAPI_GRO_CB(skb)->csum_valid) |
| NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, |
| csum_partial(start, len, 0)); |
| } |
| |
| /* GRO checksum functions. These are logical equivalents of the normal |
| * checksum functions (in skbuff.h) except that they operate on the GRO |
| * offsets and fields in sk_buff. |
| */ |
| |
| __sum16 __skb_gro_checksum_complete(struct sk_buff *skb); |
| |
| static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb) |
| { |
| return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb)); |
| } |
| |
| static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb, |
| bool zero_okay, |
| __sum16 check) |
| { |
| return ((skb->ip_summed != CHECKSUM_PARTIAL || |
| skb_checksum_start_offset(skb) < |
| skb_gro_offset(skb)) && |
| !skb_at_gro_remcsum_start(skb) && |
| NAPI_GRO_CB(skb)->csum_cnt == 0 && |
| (!zero_okay || check)); |
| } |
| |
| static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb, |
| __wsum psum) |
| { |
| if (NAPI_GRO_CB(skb)->csum_valid && |
| !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum))) |
| return 0; |
| |
| NAPI_GRO_CB(skb)->csum = psum; |
| |
| return __skb_gro_checksum_complete(skb); |
| } |
| |
| static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb) |
| { |
| if (NAPI_GRO_CB(skb)->csum_cnt > 0) { |
| /* Consume a checksum from CHECKSUM_UNNECESSARY */ |
| NAPI_GRO_CB(skb)->csum_cnt--; |
| } else { |
| /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we |
| * verified a new top level checksum or an encapsulated one |
| * during GRO. This saves work if we fallback to normal path. |
| */ |
| __skb_incr_checksum_unnecessary(skb); |
| } |
| } |
| |
| #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \ |
| compute_pseudo) \ |
| ({ \ |
| __sum16 __ret = 0; \ |
| if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \ |
| __ret = __skb_gro_checksum_validate_complete(skb, \ |
| compute_pseudo(skb, proto)); \ |
| if (!__ret) \ |
| skb_gro_incr_csum_unnecessary(skb); \ |
| __ret; \ |
| }) |
| |
| #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \ |
| __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo) |
| |
| #define skb_gro_checksum_validate_zero_check(skb, proto, check, \ |
| compute_pseudo) \ |
| __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo) |
| |
| #define skb_gro_checksum_simple_validate(skb) \ |
| __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo) |
| |
| static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb) |
| { |
| return (NAPI_GRO_CB(skb)->csum_cnt == 0 && |
| !NAPI_GRO_CB(skb)->csum_valid); |
| } |
| |
| static inline void __skb_gro_checksum_convert(struct sk_buff *skb, |
| __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, |
| unsigned int off, size_t hdrlen, |
| int start, int offset, |
| struct gro_remcsum *grc, |
| bool nopartial) |
| { |
| __wsum delta; |
| size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start); |
| |
| BUG_ON(!NAPI_GRO_CB(skb)->csum_valid); |
| |
| if (!nopartial) { |
| NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start; |
| return ptr; |
| } |
| |
| ptr = skb_gro_header_fast(skb, off); |
| if (skb_gro_header_hard(skb, off + plen)) { |
| ptr = skb_gro_header_slow(skb, off + plen, off); |
| if (!ptr) |
| return NULL; |
| } |
| |
| delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum, |
| start, offset); |
| |
| /* Adjust skb->csum since we changed the packet */ |
| NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta); |
| |
| grc->offset = off + hdrlen + offset; |
| grc->delta = delta; |
| |
| return ptr; |
| } |
| |
| static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, |
| struct gro_remcsum *grc) |
| { |
| void *ptr; |
| size_t plen = grc->offset + sizeof(u16); |
| |
| if (!grc->delta) |
| return; |
| |
| ptr = skb_gro_header_fast(skb, grc->offset); |
| if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) { |
| ptr = skb_gro_header_slow(skb, plen, grc->offset); |
| if (!ptr) |
| return; |
| } |
| |
| remcsum_unadjust((__sum16 *)ptr, grc->delta); |
| } |
| |
| #ifdef CONFIG_XFRM_OFFLOAD |
| static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush) |
| { |
| if (PTR_ERR(pp) != -EINPROGRESS) |
| NAPI_GRO_CB(skb)->flush |= flush; |
| } |
| static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb, |
| struct sk_buff **pp, |
| int flush, |
| struct gro_remcsum *grc) |
| { |
| if (PTR_ERR(pp) != -EINPROGRESS) { |
| NAPI_GRO_CB(skb)->flush |= flush; |
| skb_gro_remcsum_cleanup(skb, grc); |
| skb->remcsum_offload = 0; |
| } |
| } |
| #else |
| static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff **pp, int flush) |
| { |
| NAPI_GRO_CB(skb)->flush |= flush; |
| } |
| static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb, |
| struct sk_buff **pp, |
| int flush, |
| struct gro_remcsum *grc) |
| { |
| NAPI_GRO_CB(skb)->flush |= flush; |
| skb_gro_remcsum_cleanup(skb, grc); |
| skb->remcsum_offload = 0; |
| } |
| #endif |
| |
| static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, |
| const void *daddr, const void *saddr, |
| unsigned int len) |
| { |
| if (!dev->header_ops || !dev->header_ops->create) |
| return 0; |
| |
| return dev->header_ops->create(skb, dev, type, daddr, saddr, len); |
| } |
| |
| static inline int dev_parse_header(const struct sk_buff *skb, |
| unsigned char *haddr) |
| { |
| const struct net_device *dev = skb->dev; |
| |
| if (!dev->header_ops || !dev->header_ops->parse) |
| return 0; |
| return dev->header_ops->parse(skb, haddr); |
| } |
| |
| /* ll_header must have at least hard_header_len allocated */ |
| static inline bool dev_validate_header(const struct net_device *dev, |
| char *ll_header, int len) |
| { |
| if (likely(len >= dev->hard_header_len)) |
| return true; |
| if (len < dev->min_header_len) |
| return false; |
| |
| if (capable(CAP_SYS_RAWIO)) { |
| memset(ll_header + len, 0, dev->hard_header_len - len); |
| return true; |
| } |
| |
| if (dev->header_ops && dev->header_ops->validate) |
| return dev->header_ops->validate(ll_header, len); |
| |
| return false; |
| } |
| |
| 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 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 |
| /* input_queue_head should be written by cpu owning this struct, |
| * and only read by other cpus. Worth using a cache line. |
| */ |
| unsigned int input_queue_head ____cacheline_aligned_in_smp; |
| |
| /* Elements below can be accessed between CPUs for RPS/RFS */ |
| call_single_data_t csd ____cacheline_aligned_in_smp; |
| struct softnet_data *rps_ipi_next; |
| unsigned int cpu; |
| unsigned int input_queue_tail; |
| #endif |
| unsigned int dropped; |
| struct sk_buff_head input_pkt_queue; |
| struct napi_struct backlog; |
| |
| }; |
| |
| static inline void input_queue_head_incr(struct softnet_data *sd) |
| { |
| #ifdef CONFIG_RPS |
| sd->input_queue_head++; |
| #endif |
| } |
| |
| static inline void input_queue_tail_incr_save(struct softnet_data *sd, |
| unsigned int *qtail) |
| { |
| #ifdef CONFIG_RPS |
| *qtail = ++sd->input_queue_tail; |
| #endif |
| } |
| |
| DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
| |
| void __netif_schedule(struct Qdisc *q); |
| void netif_schedule_queue(struct netdev_queue *txq); |
| |
| static inline void netif_tx_schedule_all(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) |
| netif_schedule_queue(netdev_get_tx_queue(dev, i)); |
| } |
| |
| static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
| { |
| clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| } |
| |
| /** |
| * netif_start_queue - allow transmit |
| * @dev: network device |
| * |
| * Allow upper layers to call the device hard_start_xmit routine. |
| */ |
| static inline void netif_start_queue(struct net_device *dev) |
| { |
| netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline void netif_tx_start_all_queues(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| netif_tx_start_queue(txq); |
| } |
| } |
| |
| void netif_tx_wake_queue(struct netdev_queue *dev_queue); |
| |
| /** |
| * netif_wake_queue - restart transmit |
| * @dev: network device |
| * |
| * Allow upper layers to call the device hard_start_xmit routine. |
| * Used for flow control when transmit resources are available. |
| */ |
| static inline void netif_wake_queue(struct net_device *dev) |
| { |
| netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline void netif_tx_wake_all_queues(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| netif_tx_wake_queue(txq); |
| } |
| } |
| |
| static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
| { |
| set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| } |
| |
| /** |
| * netif_stop_queue - stop transmitted packets |
| * @dev: network device |
| * |
| * Stop upper layers calling the device hard_start_xmit routine. |
| * Used for flow control when transmit resources are unavailable. |
| */ |
| static inline void netif_stop_queue(struct net_device *dev) |
| { |
| netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| void netif_tx_stop_all_queues(struct net_device *dev); |
| |
| static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
| { |
| return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| } |
| |
| /** |
| * netif_queue_stopped - test if transmit queue is flowblocked |
| * @dev: network device |
| * |
| * Test if transmit queue on device is currently unable to send. |
| */ |
| static inline bool netif_queue_stopped(const struct net_device *dev) |
| { |
| return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
| { |
| return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
| } |
| |
| static inline bool |
| netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
| { |
| return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; |
| } |
| |
| static inline bool |
| netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) |
| { |
| return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; |
| } |
| |
| /** |
| * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write |
| * @dev_queue: pointer to transmit queue |
| * |
| * BQL enabled drivers might use this helper in their ndo_start_xmit(), |
| * to give appropriate hint to the CPU. |
| */ |
| static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) |
| { |
| #ifdef CONFIG_BQL |
| prefetchw(&dev_queue->dql.num_queued); |
| #endif |
| } |
| |
| /** |
| * netdev_txq_bql_complete_prefetchw - prefetch bql data for write |
| * @dev_queue: pointer to transmit queue |
| * |
| * BQL enabled drivers might use this helper in their TX completion path, |
| * to give appropriate hint to the CPU. |
| */ |
| static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) |
| { |
| #ifdef CONFIG_BQL |
| prefetchw(&dev_queue->dql.limit); |
| #endif |
| } |
| |
| static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
| unsigned int bytes) |
| { |
| #ifdef CONFIG_BQL |
| dql_queued(&dev_queue->dql, bytes); |
| |
| if (likely(dql_avail(&dev_queue->dql) >= 0)) |
| return; |
| |
| set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
| |
| /* |
| * The XOFF flag must be set before checking the dql_avail below, |
| * because in netdev_tx_completed_queue we update the dql_completed |
| * before checking the XOFF flag. |
| */ |
| smp_mb(); |
| |
| /* check again in case another CPU has just made room avail */ |
| if (unlikely(dql_avail(&dev_queue->dql) >= 0)) |
| clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
| #endif |
| } |
| |
| /** |
| * 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)); |
| } |
| |
| /** |
| * netif_wake_subqueue - allow sending packets on subqueue |
| * @dev: network device |
| * @queue_index: sub queue index |
| * |
| * Resume individual transmit queue of a device with multiple transmit queues. |
| */ |
| static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
| { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
| |
| netif_tx_wake_queue(txq); |
| } |
| |
| #ifdef CONFIG_XPS |
| int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
| u16 index); |
| #else |
| static inline int netif_set_xps_queue(struct net_device *dev, |
| const struct cpumask *mask, |
| u16 index) |
| { |
| return 0; |
| } |
| #endif |
| |
| u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb, |
| unsigned int num_tx_queues); |
| |
| /* |
| * 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); |
| } |
| |
| void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog); |
| int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb); |
| int netif_rx(struct sk_buff *skb); |
| int netif_rx_ni(struct sk_buff *skb); |
| int netif_receive_skb(struct sk_buff *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; |
| } |
| |
| bool netdev_is_rx_handler_busy(struct net_device *dev); |
| int netdev_rx_handler_register(struct net_device *dev, |
| rx_handler_func_t *rx_handler, |
| void *rx_handler_data); |
| void netdev_rx_handler_unregister(struct net_device *dev); |
| |
| bool dev_valid_name(const char *name); |
| 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); |
| 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); |
| int dev_change_proto_down(struct net_device *dev, bool proto_down); |
| 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); |
| |
| typedef int (*xdp_op_t)(struct net_device *dev, struct netdev_xdp *xdp); |
| int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack, |
| int fd, u32 flags); |
| u8 __dev_xdp_attached(struct net_device *dev, xdp_op_t xdp_op, u32 *prog_id); |
| |
| int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
| int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
| bool is_skb_forwardable(const struct net_device *dev, |
| const struct sk_buff *skb); |
| |
| static __always_inline int ____dev_forward_skb(struct net_device *dev, |
| struct sk_buff *skb) |
| { |
| if (skb_orphan_frags(skb, GFP_ATOMIC) || |
| unlikely(!is_skb_forwardable(dev, skb))) { |
| atomic_long_inc(&dev->rx_dropped); |
| kfree_skb(skb); |
| return NET_RX_DROP; |
| } | <