| /* |
| * 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/pm_qos.h> |
| #include <linux/timer.h> |
| #include <linux/bug.h> |
| #include <linux/delay.h> |
| #include <linux/atomic.h> |
| #include <asm/cache.h> |
| #include <asm/byteorder.h> |
| |
| #include <linux/percpu.h> |
| #include <linux/rculist.h> |
| #include <linux/dmaengine.h> |
| #include <linux/workqueue.h> |
| #include <linux/dynamic_queue_limits.h> |
| |
| #include <linux/ethtool.h> |
| #include <net/net_namespace.h> |
| #include <net/dsa.h> |
| #ifdef CONFIG_DCB |
| #include <net/dcbnl.h> |
| #endif |
| #include <net/netprio_cgroup.h> |
| |
| #include <linux/netdev_features.h> |
| #include <linux/neighbour.h> |
| #include <uapi/linux/netdevice.h> |
| |
| struct netpoll_info; |
| struct device; |
| struct phy_device; |
| /* 802.11 specific */ |
| struct wireless_dev; |
| /* source back-compat hooks */ |
| #define SET_ETHTOOL_OPS(netdev,ops) \ |
| ( (netdev)->ethtool_ops = (ops) ) |
| |
| void netdev_set_default_ethtool_ops(struct net_device *dev, |
| const struct ethtool_ops *ops); |
| |
| /* hardware address assignment types */ |
| #define NET_ADDR_PERM 0 /* address is permanent (default) */ |
| #define NET_ADDR_RANDOM 1 /* address is generated randomly */ |
| #define NET_ADDR_STOLEN 2 /* address is stolen from other device */ |
| #define NET_ADDR_SET 3 /* address is set using |
| * dev_set_mac_address() */ |
| |
| /* Backlog congestion levels */ |
| #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
| #define NET_RX_DROP 1 /* packet dropped */ |
| |
| /* |
| * Transmit return codes: transmit return codes originate from three different |
| * namespaces: |
| * |
| * - qdisc return codes |
| * - driver transmit return codes |
| * - errno values |
| * |
| * Drivers are allowed to return any one of those in their hard_start_xmit() |
| * function. Real network devices commonly used with qdiscs should only return |
| * the driver transmit return codes though - when qdiscs are used, the actual |
| * transmission happens asynchronously, so the value is not propagated to |
| * higher layers. Virtual network devices transmit synchronously, in this case |
| * the driver transmit return codes are consumed by dev_queue_xmit(), all |
| * others are propagated to higher layers. |
| */ |
| |
| /* qdisc ->enqueue() return codes. */ |
| #define NET_XMIT_SUCCESS 0x00 |
| #define NET_XMIT_DROP 0x01 /* skb dropped */ |
| #define NET_XMIT_CN 0x02 /* congestion notification */ |
| #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ |
| #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
| |
| /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
| * indicates that the device will soon be dropping packets, or already drops |
| * some packets of the same priority; prompting us to send less aggressively. */ |
| #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
| #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
| |
| /* Driver transmit return codes */ |
| #define NETDEV_TX_MASK 0xf0 |
| |
| enum netdev_tx { |
| __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
| NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
| NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ |
| NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ |
| }; |
| typedef enum netdev_tx netdev_tx_t; |
| |
| /* |
| * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; |
| * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. |
| */ |
| static inline bool dev_xmit_complete(int rc) |
| { |
| /* |
| * Positive cases with an skb consumed by a driver: |
| * - successful transmission (rc == NETDEV_TX_OK) |
| * - error while transmitting (rc < 0) |
| * - error while queueing to a different device (rc & NET_XMIT_MASK) |
| */ |
| if (likely(rc < NET_XMIT_MASK)) |
| return true; |
| |
| return false; |
| } |
| |
| /* |
| * Compute the worst case header length according to the protocols |
| * used. |
| */ |
| |
| #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
| # if defined(CONFIG_MAC80211_MESH) |
| # define LL_MAX_HEADER 128 |
| # else |
| # define LL_MAX_HEADER 96 |
| # endif |
| #else |
| # define LL_MAX_HEADER 32 |
| #endif |
| |
| #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
| !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) |
| #define MAX_HEADER LL_MAX_HEADER |
| #else |
| #define MAX_HEADER (LL_MAX_HEADER + 48) |
| #endif |
| |
| /* |
| * Old network device statistics. Fields are native words |
| * (unsigned long) so they can be read and written atomically. |
| */ |
| |
| struct net_device_stats { |
| unsigned long rx_packets; |
| unsigned long tx_packets; |
| unsigned long rx_bytes; |
| unsigned long tx_bytes; |
| unsigned long rx_errors; |
| unsigned long tx_errors; |
| unsigned long rx_dropped; |
| unsigned long tx_dropped; |
| unsigned long multicast; |
| unsigned long collisions; |
| unsigned long rx_length_errors; |
| unsigned long rx_over_errors; |
| unsigned long rx_crc_errors; |
| unsigned long rx_frame_errors; |
| unsigned long rx_fifo_errors; |
| unsigned long rx_missed_errors; |
| unsigned long tx_aborted_errors; |
| unsigned long tx_carrier_errors; |
| unsigned long tx_fifo_errors; |
| unsigned long tx_heartbeat_errors; |
| unsigned long tx_window_errors; |
| unsigned long rx_compressed; |
| unsigned long tx_compressed; |
| }; |
| |
| |
| #include <linux/cache.h> |
| #include <linux/skbuff.h> |
| |
| #ifdef CONFIG_RPS |
| #include <linux/static_key.h> |
| extern struct static_key rps_needed; |
| #endif |
| |
| struct neighbour; |
| struct neigh_parms; |
| struct sk_buff; |
| |
| struct netdev_hw_addr { |
| struct list_head list; |
| unsigned char addr[MAX_ADDR_LEN]; |
| unsigned char type; |
| #define NETDEV_HW_ADDR_T_LAN 1 |
| #define NETDEV_HW_ADDR_T_SAN 2 |
| #define NETDEV_HW_ADDR_T_SLAVE 3 |
| #define NETDEV_HW_ADDR_T_UNICAST 4 |
| #define NETDEV_HW_ADDR_T_MULTICAST 5 |
| bool global_use; |
| int sync_cnt; |
| int refcount; |
| int synced; |
| struct rcu_head rcu_head; |
| }; |
| |
| struct netdev_hw_addr_list { |
| struct list_head list; |
| int count; |
| }; |
| |
| #define netdev_hw_addr_list_count(l) ((l)->count) |
| #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) |
| #define netdev_hw_addr_list_for_each(ha, l) \ |
| list_for_each_entry(ha, &(l)->list, list) |
| |
| #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
| #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) |
| #define netdev_for_each_uc_addr(ha, dev) \ |
| netdev_hw_addr_list_for_each(ha, &(dev)->uc) |
| |
| #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
| #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) |
| #define netdev_for_each_mc_addr(ha, dev) \ |
| netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
| |
| struct hh_cache { |
| u16 hh_len; |
| u16 __pad; |
| seqlock_t hh_lock; |
| |
| /* cached hardware header; allow for machine alignment needs. */ |
| #define HH_DATA_MOD 16 |
| #define HH_DATA_OFF(__len) \ |
| (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
| #define HH_DATA_ALIGN(__len) \ |
| (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
| unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
| }; |
| |
| /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. |
| * Alternative is: |
| * dev->hard_header_len ? (dev->hard_header_len + |
| * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
| * |
| * We could use other alignment values, but we must maintain the |
| * relationship HH alignment <= LL alignment. |
| */ |
| #define LL_RESERVED_SPACE(dev) \ |
| ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
| ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
| |
| struct header_ops { |
| int (*create) (struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, const void *daddr, |
| const void *saddr, unsigned int len); |
| int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
| int (*rebuild)(struct sk_buff *skb); |
| int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
| void (*cache_update)(struct hh_cache *hh, |
| const struct net_device *dev, |
| const unsigned char *haddr); |
| }; |
| |
| /* These flag bits are private to the generic network queueing |
| * layer, they may not be explicitly referenced by any other |
| * code. |
| */ |
| |
| enum netdev_state_t { |
| __LINK_STATE_START, |
| __LINK_STATE_PRESENT, |
| __LINK_STATE_NOCARRIER, |
| __LINK_STATE_LINKWATCH_PENDING, |
| __LINK_STATE_DORMANT, |
| }; |
| |
| |
| /* |
| * This structure holds at boot time configured netdevice settings. They |
| * are then used in the device probing. |
| */ |
| struct netdev_boot_setup { |
| char name[IFNAMSIZ]; |
| struct ifmap map; |
| }; |
| #define NETDEV_BOOT_SETUP_MAX 8 |
| |
| int __init netdev_boot_setup(char *str); |
| |
| /* |
| * Structure for NAPI scheduling similar to tasklet but with weighting |
| */ |
| struct napi_struct { |
| /* The poll_list must only be managed by the entity which |
| * changes the state of the NAPI_STATE_SCHED bit. This means |
| * whoever atomically sets that bit can add this napi_struct |
| * to the per-cpu poll_list, and whoever clears that bit |
| * can remove from the list right before clearing the bit. |
| */ |
| struct list_head poll_list; |
| |
| unsigned long state; |
| int weight; |
| unsigned int gro_count; |
| int (*poll)(struct napi_struct *, int); |
| #ifdef CONFIG_NETPOLL |
| spinlock_t poll_lock; |
| int poll_owner; |
| #endif |
| struct net_device *dev; |
| struct sk_buff *gro_list; |
| struct sk_buff *skb; |
| struct list_head dev_list; |
| struct hlist_node napi_hash_node; |
| unsigned int napi_id; |
| }; |
| |
| enum { |
| NAPI_STATE_SCHED, /* Poll is scheduled */ |
| NAPI_STATE_DISABLE, /* Disable pending */ |
| NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
| NAPI_STATE_HASHED, /* In NAPI hash */ |
| }; |
| |
| enum gro_result { |
| GRO_MERGED, |
| GRO_MERGED_FREE, |
| GRO_HELD, |
| GRO_NORMAL, |
| GRO_DROP, |
| }; |
| typedef enum gro_result gro_result_t; |
| |
| /* |
| * enum rx_handler_result - Possible return values for rx_handlers. |
| * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it |
| * further. |
| * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in |
| * case skb->dev was changed by rx_handler. |
| * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. |
| * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. |
| * |
| * rx_handlers are functions called from inside __netif_receive_skb(), to do |
| * special processing of the skb, prior to delivery to protocol handlers. |
| * |
| * Currently, a net_device can only have a single rx_handler registered. Trying |
| * to register a second rx_handler will return -EBUSY. |
| * |
| * To register a rx_handler on a net_device, use netdev_rx_handler_register(). |
| * To unregister a rx_handler on a net_device, use |
| * netdev_rx_handler_unregister(). |
| * |
| * Upon return, rx_handler is expected to tell __netif_receive_skb() what to |
| * do with the skb. |
| * |
| * If the rx_handler consumed to skb in some way, it should return |
| * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
| * the skb to be delivered in some other ways. |
| * |
| * If the rx_handler changed skb->dev, to divert the skb to another |
| * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the |
| * new device will be called if it exists. |
| * |
| * If the rx_handler consider the skb should be ignored, it should return |
| * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
| * are registered on exact device (ptype->dev == skb->dev). |
| * |
| * If the rx_handler didn't changed skb->dev, but want the skb to be normally |
| * delivered, it should return RX_HANDLER_PASS. |
| * |
| * A device without a registered rx_handler will behave as if rx_handler |
| * returned RX_HANDLER_PASS. |
| */ |
| |
| enum rx_handler_result { |
| RX_HANDLER_CONSUMED, |
| RX_HANDLER_ANOTHER, |
| RX_HANDLER_EXACT, |
| RX_HANDLER_PASS, |
| }; |
| typedef enum rx_handler_result rx_handler_result_t; |
| typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); |
| |
| void __napi_schedule(struct napi_struct *n); |
| |
| static inline bool napi_disable_pending(struct napi_struct *n) |
| { |
| return test_bit(NAPI_STATE_DISABLE, &n->state); |
| } |
| |
| /** |
| * napi_schedule_prep - check if napi can be scheduled |
| * @n: napi context |
| * |
| * Test if NAPI routine is already running, and if not mark |
| * it as running. This is used as a condition variable |
| * insure only one NAPI poll instance runs. We also make |
| * sure there is no pending NAPI disable. |
| */ |
| static inline bool napi_schedule_prep(struct napi_struct *n) |
| { |
| return !napi_disable_pending(n) && |
| !test_and_set_bit(NAPI_STATE_SCHED, &n->state); |
| } |
| |
| /** |
| * napi_schedule - schedule NAPI poll |
| * @n: napi context |
| * |
| * Schedule NAPI poll routine to be called if it is not already |
| * running. |
| */ |
| static inline void napi_schedule(struct napi_struct *n) |
| { |
| if (napi_schedule_prep(n)) |
| __napi_schedule(n); |
| } |
| |
| /* 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; |
| } |
| |
| /** |
| * napi_complete - NAPI processing complete |
| * @n: napi context |
| * |
| * Mark NAPI processing as complete. |
| */ |
| void __napi_complete(struct napi_struct *n); |
| void napi_complete(struct napi_struct *n); |
| |
| /** |
| * napi_by_id - lookup a NAPI by napi_id |
| * @napi_id: hashed napi_id |
| * |
| * lookup @napi_id in napi_hash table |
| * must be called under rcu_read_lock() |
| */ |
| struct napi_struct *napi_by_id(unsigned int napi_id); |
| |
| /** |
| * napi_hash_add - add a NAPI to global hashtable |
| * @napi: napi context |
| * |
| * generate a new napi_id and store a @napi under it in napi_hash |
| */ |
| void napi_hash_add(struct napi_struct *napi); |
| |
| /** |
| * napi_hash_del - remove a NAPI from global table |
| * @napi: napi context |
| * |
| * Warning: caller must observe rcu grace period |
| * before freeing memory containing @napi |
| */ |
| void napi_hash_del(struct napi_struct *napi); |
| |
| /** |
| * napi_disable - prevent NAPI from scheduling |
| * @n: napi context |
| * |
| * Stop NAPI from being scheduled on this context. |
| * Waits till any outstanding processing completes. |
| */ |
| static inline void napi_disable(struct napi_struct *n) |
| { |
| set_bit(NAPI_STATE_DISABLE, &n->state); |
| while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
| msleep(1); |
| clear_bit(NAPI_STATE_DISABLE, &n->state); |
| } |
| |
| /** |
| * 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_clear_bit(); |
| clear_bit(NAPI_STATE_SCHED, &n->state); |
| } |
| |
| #ifdef CONFIG_SMP |
| /** |
| * napi_synchronize - wait until NAPI is not running |
| * @n: napi context |
| * |
| * Wait until NAPI is done being scheduled on this context. |
| * Waits till any outstanding processing completes but |
| * does not disable future activations. |
| */ |
| static inline void napi_synchronize(const struct napi_struct *n) |
| { |
| while (test_bit(NAPI_STATE_SCHED, &n->state)) |
| msleep(1); |
| } |
| #else |
| # define napi_synchronize(n) barrier() |
| #endif |
| |
| enum netdev_queue_state_t { |
| __QUEUE_STATE_DRV_XOFF, |
| __QUEUE_STATE_STACK_XOFF, |
| __QUEUE_STATE_FROZEN, |
| #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ |
| (1 << __QUEUE_STATE_STACK_XOFF)) |
| #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ |
| (1 << __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 *qdisc; |
| struct Qdisc *qdisc_sleeping; |
| #ifdef CONFIG_SYSFS |
| struct kobject kobj; |
| #endif |
| #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
| int numa_node; |
| #endif |
| /* |
| * write mostly part |
| */ |
| spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
| int xmit_lock_owner; |
| /* |
| * please use this field instead of dev->trans_start |
| */ |
| unsigned long trans_start; |
| |
| /* |
| * Number of TX timeouts for this queue |
| * (/sys/class/net/DEV/Q/trans_timeout) |
| */ |
| unsigned long trans_timeout; |
| |
| unsigned long state; |
| |
| #ifdef CONFIG_BQL |
| struct dql dql; |
| #endif |
| } ____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). |
| */ |
| struct rps_sock_flow_table { |
| unsigned int mask; |
| u16 ents[0]; |
| }; |
| #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ |
| ((_num) * sizeof(u16))) |
| |
| #define RPS_NO_CPU 0xffff |
| |
| static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
| u32 hash) |
| { |
| if (table && hash) { |
| unsigned int cpu, index = hash & table->mask; |
| |
| /* We only give a hint, preemption can change cpu under us */ |
| cpu = raw_smp_processor_id(); |
| |
| if (table->ents[index] != cpu) |
| table->ents[index] = cpu; |
| } |
| } |
| |
| static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, |
| u32 hash) |
| { |
| if (table && hash) |
| table->ents[hash & table->mask] = RPS_NO_CPU; |
| } |
| |
| extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
| |
| #ifdef CONFIG_RFS_ACCEL |
| bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
| u16 filter_id); |
| #endif |
| |
| /* This structure contains an instance of an RX queue. */ |
| struct netdev_rx_queue { |
| struct rps_map __rcu *rps_map; |
| struct rps_dev_flow_table __rcu *rps_flow_table; |
| struct kobject kobj; |
| struct net_device *dev; |
| } ____cacheline_aligned_in_smp; |
| #endif /* CONFIG_RPS */ |
| |
| #ifdef CONFIG_XPS |
| /* |
| * This structure holds an XPS map which can be of variable length. The |
| * map is an array of queues. |
| */ |
| struct xps_map { |
| unsigned int len; |
| unsigned int alloc_len; |
| struct rcu_head rcu; |
| u16 queues[0]; |
| }; |
| #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
| #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
| / sizeof(u16)) |
| |
| /* |
| * This structure holds all XPS maps for device. Maps are indexed by CPU. |
| */ |
| struct xps_dev_maps { |
| struct rcu_head rcu; |
| struct xps_map __rcu *cpu_map[0]; |
| }; |
| #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ |
| (nr_cpu_ids * sizeof(struct xps_map *))) |
| #endif /* CONFIG_XPS */ |
| |
| #define TC_MAX_QUEUE 16 |
| #define TC_BITMASK 15 |
| /* HW offloaded queuing disciplines txq count and offset maps */ |
| struct netdev_tc_txq { |
| u16 count; |
| u16 offset; |
| }; |
| |
| #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| /* |
| * This structure is to hold information about the device |
| * configured to run FCoE protocol stack. |
| */ |
| struct netdev_fcoe_hbainfo { |
| char manufacturer[64]; |
| char serial_number[64]; |
| char hardware_version[64]; |
| char driver_version[64]; |
| char optionrom_version[64]; |
| char firmware_version[64]; |
| char model[256]; |
| char model_description[256]; |
| }; |
| #endif |
| |
| #define MAX_PHYS_PORT_ID_LEN 32 |
| |
| /* This structure holds a unique identifier to identify the |
| * physical port used by a netdevice. |
| */ |
| struct netdev_phys_port_id { |
| unsigned char id[MAX_PHYS_PORT_ID_LEN]; |
| unsigned char id_len; |
| }; |
| |
| /* |
| * This structure defines the management hooks for network devices. |
| * The following hooks can be defined; unless noted otherwise, they are |
| * optional and can be filled with a null pointer. |
| * |
| * int (*ndo_init)(struct net_device *dev); |
| * This function is called once when network device is registered. |
| * The network device can use this to any late stage initializaton |
| * or semantic validattion. It can fail with an error code which will |
| * be propogated back to register_netdev |
| * |
| * void (*ndo_uninit)(struct net_device *dev); |
| * This function is called when device is unregistered or when registration |
| * fails. It is not called if init fails. |
| * |
| * int (*ndo_open)(struct net_device *dev); |
| * This function is called when network device transistions to the up |
| * state. |
| * |
| * int (*ndo_stop)(struct net_device *dev); |
| * This function is called when network device transistions to the down |
| * state. |
| * |
| * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
| * struct net_device *dev); |
| * Called when a packet needs to be transmitted. |
| * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
| * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) |
| * Required can not be NULL. |
| * |
| * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); |
| * Called to decide which queue to when device supports multiple |
| * transmit queues. |
| * |
| * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
| * This function is called to allow device receiver to make |
| * changes to configuration when multicast or promiscious is enabled. |
| * |
| * void (*ndo_set_rx_mode)(struct net_device *dev); |
| * This function is called device changes address list filtering. |
| * If driver handles unicast address filtering, it should set |
| * IFF_UNICAST_FLT to its priv_flags. |
| * |
| * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); |
| * This function is called when the Media Access Control address |
| * needs to be changed. If this interface is not defined, the |
| * mac address can not be changed. |
| * |
| * int (*ndo_validate_addr)(struct net_device *dev); |
| * Test if Media Access Control address is valid for the device. |
| * |
| * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); |
| * Called when a user request an ioctl which can't be handled by |
| * the generic interface code. If not defined ioctl's return |
| * not supported error code. |
| * |
| * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); |
| * Used to set network devices bus interface parameters. This interface |
| * is retained for legacy reason, new devices should use the bus |
| * interface (PCI) for low level management. |
| * |
| * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); |
| * Called when a user wants to change the Maximum Transfer Unit |
| * of a device. If not defined, any request to change MTU will |
| * will return an error. |
| * |
| * void (*ndo_tx_timeout)(struct net_device *dev); |
| * Callback uses when the transmitter has not made any progress |
| * for dev->watchdog ticks. |
| * |
| * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
| * struct rtnl_link_stats64 *storage); |
| * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| * Called when a user wants to get the network device usage |
| * statistics. Drivers must do one of the following: |
| * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
| * rtnl_link_stats64 structure passed by the caller. |
| * 2. Define @ndo_get_stats to update a net_device_stats structure |
| * (which should normally be dev->stats) and return a pointer to |
| * it. The structure may be changed asynchronously only if each |
| * field is written atomically. |
| * 3. Update dev->stats asynchronously and atomically, and define |
| * neither operation. |
| * |
| * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid); |
| * If device support VLAN filtering this function is called when a |
| * VLAN id is registered. |
| * |
| * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
| * If device support VLAN filtering this function is called when a |
| * VLAN id is unregistered. |
| * |
| * void (*ndo_poll_controller)(struct net_device *dev); |
| * |
| * SR-IOV management functions. |
| * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); |
| * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); |
| * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); |
| * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
| * int (*ndo_get_vf_config)(struct net_device *dev, |
| * int vf, struct ifla_vf_info *ivf); |
| * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
| * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
| * struct nlattr *port[]); |
| * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
| * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
| * Called to setup 'tc' number of traffic classes in the net device. This |
| * is always called from the stack with the rtnl lock held and netif tx |
| * queues stopped. This allows the netdevice to perform queue management |
| * safely. |
| * |
| * Fiber Channel over Ethernet (FCoE) offload functions. |
| * int (*ndo_fcoe_enable)(struct net_device *dev); |
| * Called when the FCoE protocol stack wants to start using LLD for FCoE |
| * so the underlying device can perform whatever needed configuration or |
| * initialization to support acceleration of FCoE traffic. |
| * |
| * int (*ndo_fcoe_disable)(struct net_device *dev); |
| * Called when the FCoE protocol stack wants to stop using LLD for FCoE |
| * so the underlying device can perform whatever needed clean-ups to |
| * stop supporting acceleration of FCoE traffic. |
| * |
| * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, |
| * struct scatterlist *sgl, unsigned int sgc); |
| * Called when the FCoE Initiator wants to initialize an I/O that |
| * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| * perform necessary setup and returns 1 to indicate the device is set up |
| * successfully to perform DDP on this I/O, otherwise this returns 0. |
| * |
| * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); |
| * Called when the FCoE Initiator/Target is done with the DDPed I/O as |
| * indicated by the FC exchange id 'xid', so the underlying device can |
| * clean up and reuse resources for later DDP requests. |
| * |
| * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, |
| * struct scatterlist *sgl, unsigned int sgc); |
| * Called when the FCoE Target wants to initialize an I/O that |
| * is a possible candidate for Direct Data Placement (DDP). The LLD can |
| * perform necessary setup and returns 1 to indicate the device is set up |
| * successfully to perform DDP on this I/O, otherwise this returns 0. |
| * |
| * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| * struct netdev_fcoe_hbainfo *hbainfo); |
| * Called when the FCoE Protocol stack wants information on the underlying |
| * device. This information is utilized by the FCoE protocol stack to |
| * register attributes with Fiber Channel management service as per the |
| * FC-GS Fabric Device Management Information(FDMI) specification. |
| * |
| * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
| * Called when the underlying device wants to override default World Wide |
| * Name (WWN) generation mechanism in FCoE protocol stack to pass its own |
| * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE |
| * protocol stack to use. |
| * |
| * RFS acceleration. |
| * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, |
| * u16 rxq_index, u32 flow_id); |
| * Set hardware filter for RFS. rxq_index is the target queue index; |
| * flow_id is a flow ID to be passed to rps_may_expire_flow() later. |
| * Return the filter ID on success, or a negative error code. |
| * |
| * Slave management functions (for bridge, bonding, etc). |
| * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
| * Called to make another netdev an underling. |
| * |
| * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); |
| * Called to release previously enslaved netdev. |
| * |
| * Feature/offload setting functions. |
| * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
| * netdev_features_t features); |
| * Adjusts the requested feature flags according to device-specific |
| * constraints, and returns the resulting flags. Must not modify |
| * the device state. |
| * |
| * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
| * Called to update device configuration to new features. Passed |
| * feature set might be less than what was returned by ndo_fix_features()). |
| * Must return >0 or -errno if it changed dev->features itself. |
| * |
| * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
| * struct net_device *dev, |
| * const unsigned char *addr, u16 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) |
| * 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, 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) |
| * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
| * struct net_device *dev, u32 filter_mask) |
| * |
| * 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_port_id *ppid); |
| * Called to get ID of physical port of this device. If driver does |
| * not implement this, it is assumed that the hw is not able to have |
| * multiple net devices on single physical port. |
| * |
| * void (*ndo_add_vxlan_port)(struct net_device *dev, |
| * sa_family_t sa_family, __be16 port); |
| * Called by vxlan to notiy a driver about the UDP port and socket |
| * address family that vxlan is listnening to. It is called only when |
| * a new port starts listening. The operation is protected by the |
| * vxlan_net->sock_lock. |
| * |
| * void (*ndo_del_vxlan_port)(struct net_device *dev, |
| * sa_family_t sa_family, __be16 port); |
| * Called by vxlan to notify the driver about a UDP port and socket |
| * address family that vxlan is not listening to anymore. The operation |
| * is protected by the vxlan_net->sock_lock. |
| */ |
| struct net_device_ops { |
| int (*ndo_init)(struct net_device *dev); |
| void (*ndo_uninit)(struct net_device *dev); |
| int (*ndo_open)(struct net_device *dev); |
| int (*ndo_stop)(struct net_device *dev); |
| netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
| struct net_device *dev); |
| u16 (*ndo_select_queue)(struct net_device *dev, |
| struct sk_buff *skb); |
| void (*ndo_change_rx_flags)(struct net_device *dev, |
| int flags); |
| void (*ndo_set_rx_mode)(struct net_device *dev); |
| int (*ndo_set_mac_address)(struct net_device *dev, |
| void *addr); |
| int (*ndo_validate_addr)(struct net_device *dev); |
| int (*ndo_do_ioctl)(struct net_device *dev, |
| struct ifreq *ifr, int cmd); |
| int (*ndo_set_config)(struct net_device *dev, |
| struct ifmap *map); |
| int (*ndo_change_mtu)(struct net_device *dev, |
| int new_mtu); |
| int (*ndo_neigh_setup)(struct net_device *dev, |
| struct neigh_parms *); |
| void (*ndo_tx_timeout) (struct net_device *dev); |
| |
| struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
| struct rtnl_link_stats64 *storage); |
| struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| |
| int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
| __be16 proto, u16 vid); |
| int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
| __be16 proto, u16 vid); |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| void (*ndo_poll_controller)(struct net_device *dev); |
| int (*ndo_netpoll_setup)(struct net_device *dev, |
| struct netpoll_info *info, |
| gfp_t gfp); |
| void (*ndo_netpoll_cleanup)(struct net_device *dev); |
| #endif |
| #ifdef CONFIG_NET_RX_BUSY_POLL |
| int (*ndo_busy_poll)(struct napi_struct *dev); |
| #endif |
| int (*ndo_set_vf_mac)(struct net_device *dev, |
| int queue, u8 *mac); |
| int (*ndo_set_vf_vlan)(struct net_device *dev, |
| int queue, u16 vlan, u8 qos); |
| int (*ndo_set_vf_tx_rate)(struct net_device *dev, |
| int vf, int rate); |
| int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
| int vf, bool setting); |
| int (*ndo_get_vf_config)(struct net_device *dev, |
| int vf, |
| struct ifla_vf_info *ivf); |
| int (*ndo_set_vf_link_state)(struct net_device *dev, |
| int vf, int link_state); |
| int (*ndo_set_vf_port)(struct net_device *dev, |
| int vf, |
| struct nlattr *port[]); |
| int (*ndo_get_vf_port)(struct net_device *dev, |
| int vf, struct sk_buff *skb); |
| int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
| #if IS_ENABLED(CONFIG_FCOE) |
| int (*ndo_fcoe_enable)(struct net_device *dev); |
| int (*ndo_fcoe_disable)(struct net_device *dev); |
| int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
| u16 xid, |
| struct scatterlist *sgl, |
| unsigned int sgc); |
| int (*ndo_fcoe_ddp_done)(struct net_device *dev, |
| u16 xid); |
| int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
| u16 xid, |
| struct scatterlist *sgl, |
| unsigned int sgc); |
| int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
| struct netdev_fcoe_hbainfo *hbainfo); |
| #endif |
| |
| #if IS_ENABLED(CONFIG_LIBFCOE) |
| #define NETDEV_FCOE_WWNN 0 |
| #define NETDEV_FCOE_WWPN 1 |
| int (*ndo_fcoe_get_wwn)(struct net_device *dev, |
| u64 *wwn, int type); |
| #endif |
| |
| #ifdef CONFIG_RFS_ACCEL |
| int (*ndo_rx_flow_steer)(struct net_device *dev, |
| const struct sk_buff *skb, |
| u16 rxq_index, |
| u32 flow_id); |
| #endif |
| int (*ndo_add_slave)(struct net_device *dev, |
| struct net_device *slave_dev); |
| int (*ndo_del_slave)(struct net_device *dev, |
| struct net_device *slave_dev); |
| netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
| netdev_features_t features); |
| int (*ndo_set_features)(struct net_device *dev, |
| netdev_features_t features); |
| int (*ndo_neigh_construct)(struct neighbour *n); |
| void (*ndo_neigh_destroy)(struct neighbour *n); |
| |
| int (*ndo_fdb_add)(struct ndmsg *ndm, |
| struct nlattr *tb[], |
| struct net_device *dev, |
| const unsigned char *addr, |
| u16 flags); |
| int (*ndo_fdb_del)(struct ndmsg *ndm, |
| struct nlattr *tb[], |
| struct net_device *dev, |
| const unsigned char *addr); |
| int (*ndo_fdb_dump)(struct sk_buff *skb, |
| struct netlink_callback *cb, |
| struct net_device *dev, |
| int idx); |
| |
| int (*ndo_bridge_setlink)(struct net_device *dev, |
| struct nlmsghdr *nlh); |
| int (*ndo_bridge_getlink)(struct sk_buff *skb, |
| u32 pid, u32 seq, |
| struct net_device *dev, |
| u32 filter_mask); |
| int (*ndo_bridge_dellink)(struct net_device *dev, |
| struct nlmsghdr *nlh); |
| int (*ndo_change_carrier)(struct net_device *dev, |
| bool new_carrier); |
| int (*ndo_get_phys_port_id)(struct net_device *dev, |
| struct netdev_phys_port_id *ppid); |
| void (*ndo_add_vxlan_port)(struct net_device *dev, |
| sa_family_t sa_family, |
| __be16 port); |
| void (*ndo_del_vxlan_port)(struct net_device *dev, |
| sa_family_t sa_family, |
| __be16 port); |
| }; |
| |
| /* |
| * 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. |
| * |
| * FIXME: cleanup struct net_device such that network protocol info |
| * moves out. |
| */ |
| |
| struct net_device { |
| |
| /* |
| * 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. |
| */ |
| char name[IFNAMSIZ]; |
| |
| /* device name hash chain, please keep it close to name[] */ |
| struct hlist_node name_hlist; |
| |
| /* snmp alias */ |
| char *ifalias; |
| |
| /* |
| * I/O specific fields |
| * FIXME: Merge these and struct ifmap into one |
| */ |
| unsigned long mem_end; /* shared mem end */ |
| unsigned long mem_start; /* shared mem start */ |
| unsigned long base_addr; /* device I/O address */ |
| unsigned int irq; /* device IRQ number */ |
| |
| /* |
| * Some hardware also needs these fields, 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; |
| |
| /* directly linked devices, like slaves for bonding */ |
| struct { |
| struct list_head upper; |
| struct list_head lower; |
| } adj_list; |
| |
| /* all linked devices, *including* neighbours */ |
| struct { |
| struct list_head upper; |
| struct list_head lower; |
| } all_adj_list; |
| |
| |
| /* currently active device features */ |
| netdev_features_t features; |
| /* user-changeable features */ |
| netdev_features_t hw_features; |
| /* user-requested features */ |
| netdev_features_t wanted_features; |
| /* mask of features inheritable by VLAN devices */ |
| netdev_features_t vlan_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. |
| */ |
| netdev_features_t hw_enc_features; |
| /* mask of fetures inheritable by MPLS */ |
| netdev_features_t mpls_features; |
| |
| /* Interface index. Unique device identifier */ |
| int ifindex; |
| int iflink; |
| |
| struct net_device_stats stats; |
| atomic_long_t rx_dropped; /* dropped packets by core network |
| * Do not use this in drivers. |
| */ |
| |
| #ifdef CONFIG_WIRELESS_EXT |
| /* List of functions to handle Wireless Extensions (instead of ioctl). |
| * See <net/iw_handler.h> for details. Jean II */ |
| const struct iw_handler_def * wireless_handlers; |
| /* Instance data managed by the core of Wireless Extensions. */ |
| struct iw_public_data * wireless_data; |
| #endif |
| /* Management operations */ |
| const struct net_device_ops *netdev_ops; |
| const struct ethtool_ops *ethtool_ops; |
| |
| /* Hardware header description */ |
| const struct header_ops *header_ops; |
| |
| unsigned int flags; /* interface flags (a la BSD) */ |
| unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
| * See if.h for definitions. */ |
| unsigned short gflags; |
| unsigned short padded; /* How much padding added by alloc_netdev() */ |
| |
| unsigned char operstate; /* RFC2863 operstate */ |
| unsigned char link_mode; /* mapping policy to operstate */ |
| |
| unsigned char if_port; /* Selectable AUI, TP,..*/ |
| unsigned char dma; /* DMA channel */ |
| |
| unsigned int mtu; /* interface MTU value */ |
| unsigned short type; /* interface hardware type */ |
| unsigned short hard_header_len; /* hardware hdr length */ |
| |
| /* extra head- and tailroom the hardware may need, but not in all cases |
| * can this be guaranteed, especially tailroom. Some cases also use |
| * LL_MAX_HEADER instead to allocate the skb. |
| */ |
| unsigned short needed_headroom; |
| unsigned short needed_tailroom; |
| |
| /* Interface address info. */ |
| unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
| unsigned char addr_assign_type; /* hw address assignment type */ |
| unsigned char addr_len; /* hardware address length */ |
| unsigned char neigh_priv_len; |
| unsigned short dev_id; /* Used to differentiate devices |
| * that share the same link |
| * layer address |
| */ |
| spinlock_t addr_list_lock; |
| struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
| struct netdev_hw_addr_list mc; /* Multicast mac addresses */ |
| struct netdev_hw_addr_list dev_addrs; /* list of device |
| * hw addresses |
| */ |
| #ifdef CONFIG_SYSFS |
| struct kset *queues_kset; |
| #endif |
| |
| bool uc_promisc; |
| unsigned int promiscuity; |
| unsigned int allmulti; |
| |
| |
| /* Protocol specific pointers */ |
| |
| #if IS_ENABLED(CONFIG_VLAN_8021Q) |
| struct vlan_info __rcu *vlan_info; /* VLAN info */ |
| #endif |
| #if IS_ENABLED(CONFIG_NET_DSA) |
| struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
| #endif |
| void *atalk_ptr; /* AppleTalk link */ |
| struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
| struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
| struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
| void *ax25_ptr; /* AX.25 specific data */ |
| struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
| assign before registering */ |
| |
| /* |
| * Cache lines mostly used on receive path (including eth_type_trans()) |
| */ |
| unsigned long last_rx; /* Time of last Rx |
| * This should not be set in |
| * drivers, unless really needed, |
| * because network stack (bonding) |
| * use it if/when necessary, to |
| * avoid dirtying this cache line. |
| */ |
| |
| /* Interface address info used in eth_type_trans() */ |
| unsigned char *dev_addr; /* hw address, (before bcast |
| because most packets are |
| unicast) */ |
| |
| |
| #ifdef CONFIG_RPS |
| struct netdev_rx_queue *_rx; |
| |
| /* Number of RX queues allocated at register_netdev() time */ |
| unsigned int num_rx_queues; |
| |
| /* Number of RX queues currently active in device */ |
| unsigned int real_num_rx_queues; |
| |
| #endif |
| |
| rx_handler_func_t __rcu *rx_handler; |
| void __rcu *rx_handler_data; |
| |
| struct netdev_queue __rcu *ingress_queue; |
| unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
| |
| |
| /* |
| * Cache lines mostly used on transmit path |
| */ |
| struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
| |
| /* Number of TX queues allocated at alloc_netdev_mq() time */ |
| unsigned int num_tx_queues; |
| |
| /* Number of TX queues currently active in device */ |
| unsigned int real_num_tx_queues; |
| |
| /* root qdisc from userspace point of view */ |
| struct Qdisc *qdisc; |
| |
| unsigned long tx_queue_len; /* Max frames per queue allowed */ |
| spinlock_t tx_global_lock; |
| |
| #ifdef CONFIG_XPS |
| struct xps_dev_maps __rcu *xps_maps; |
| #endif |
| #ifdef CONFIG_RFS_ACCEL |
| /* 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. */ |
| struct cpu_rmap *rx_cpu_rmap; |
| #endif |
| |
| /* These may be needed for future network-power-down code. */ |
| |
| /* |
| * trans_start here is expensive for high speed devices on SMP, |
| * please use netdev_queue->trans_start instead. |
| */ |
| unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
| |
| int watchdog_timeo; /* used by dev_watchdog() */ |
| struct timer_list watchdog_timer; |
| |
| /* Number of references to this device */ |
| int __percpu *pcpu_refcnt; |
| |
| /* delayed register/unregister */ |
| struct list_head todo_list; |
| /* device index hash chain */ |
| struct hlist_node index_hlist; |
| |
| struct list_head link_watch_list; |
| |
| /* register/unregister state machine */ |
| 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; /* device is going do be freed */ |
| |
| enum { |
| RTNL_LINK_INITIALIZED, |
| RTNL_LINK_INITIALIZING, |
| } rtnl_link_state:16; |
| |
| /* Called from unregister, can be used to call free_netdev */ |
| void (*destructor)(struct net_device *dev); |
| |
| #ifdef CONFIG_NETPOLL |
| struct netpoll_info __rcu *npinfo; |
| #endif |
| |
| #ifdef CONFIG_NET_NS |
| /* Network namespace this network device is inside */ |
| struct net *nd_net; |
| #endif |
| |
| /* mid-layer private */ |
| union { |
| void *ml_priv; |
| struct pcpu_lstats __percpu *lstats; /* loopback stats */ |
| struct pcpu_tstats __percpu *tstats; /* tunnel stats */ |
| struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
| struct pcpu_vstats __percpu *vstats; /* veth stats */ |
| }; |
| /* GARP */ |
| struct garp_port __rcu *garp_port; |
| /* MRP */ |
| struct mrp_port __rcu *mrp_port; |
| |
| /* class/net/name entry */ |
| struct device dev; |
| /* space for optional device, statistics, and wireless sysfs groups */ |
| const struct attribute_group *sysfs_groups[4]; |
| |
| /* rtnetlink link ops */ |
| 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 |
| /* Data Center Bridging netlink ops */ |
| 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) |
| /* max exchange id for FCoE LRO by ddp */ |
| unsigned int fcoe_ddp_xid; |
| #endif |
| #if IS_ENABLED(CONFIG_NETPRIO_CGROUP) |
| struct netprio_map __rcu *priomap; |
| #endif |
| /* phy device may attach itself for hardware timestamping */ |
| struct phy_device *phydev; |
| |
| struct lock_class_key *qdisc_tx_busylock; |
| |
| /* group the device belongs to */ |
| int group; |
| |
| struct pm_qos_request pm_qos_req; |
| }; |
| #define to_net_dev(d) container_of(d, struct net_device, dev) |
| |
| #define NETDEV_ALIGN 32 |
| |
| static inline |
| int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) |
| { |
| return dev->prio_tc_map[prio & TC_BITMASK]; |
| } |
| |
| static inline |
| int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) |
| { |
| if (tc >= dev->num_tc) |
| return -EINVAL; |
| |
| dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; |
| return 0; |
| } |
| |
| static inline |
| void netdev_reset_tc(struct net_device *dev) |
| { |
| dev->num_tc = 0; |
| memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); |
| memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); |
| } |
| |
| static inline |
| int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) |
| { |
| if (tc >= dev->num_tc) |
| return -EINVAL; |
| |
| dev->tc_to_txq[tc].count = count; |
| dev->tc_to_txq[tc].offset = offset; |
| return 0; |
| } |
| |
| static inline |
| int netdev_set_num_tc(struct net_device *dev, u8 num_tc) |
| { |
| if (num_tc > TC_MAX_QUEUE) |
| return -EINVAL; |
| |
| dev->num_tc = num_tc; |
| return 0; |
| } |
| |
| static inline |
| int netdev_get_num_tc(struct net_device *dev) |
| { |
| return dev->num_tc; |
| } |
| |
| static inline |
| struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, |
| unsigned int index) |
| { |
| return &dev->_tx[index]; |
| } |
| |
| static inline void netdev_for_each_tx_queue(struct net_device *dev, |
| void (*f)(struct net_device *, |
| struct netdev_queue *, |
| void *), |
| void *arg) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) |
| f(dev, &dev->_tx[i], arg); |
| } |
| |
| struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
| struct sk_buff *skb); |
| u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb); |
| |
| /* |
| * 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) |
| { |
| #ifdef CONFIG_NET_NS |
| release_net(dev->nd_net); |
| dev->nd_net = hold_net(net); |
| #endif |
| } |
| |
| static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
| { |
| #ifdef CONFIG_NET_DSA_TAG_DSA |
| if (dev->dsa_ptr != NULL) |
| return dsa_uses_dsa_tags(dev->dsa_ptr); |
| #endif |
| |
| return 0; |
| } |
| |
| static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
| { |
| #ifdef CONFIG_NET_DSA_TAG_TRAILER |
| if (dev->dsa_ptr != NULL) |
| return dsa_uses_trailer_tags(dev->dsa_ptr); |
| #endif |
| |
| return 0; |
| } |
| |
| /** |
| * 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 |
| * fin grained indentification of different network device types. For |
| * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. |
| */ |
| #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) |
| |
| /* Default NAPI poll() weight |
| * Device drivers are strongly advised to not use bigger value |
| */ |
| #define NAPI_POLL_WEIGHT 64 |
| |
| /** |
| * netif_napi_add - initialize a napi context |
| * @dev: network device |
| * @napi: napi context |
| * @poll: polling function |
| * @weight: default weight |
| * |
| * netif_napi_add() must be used to initialize a napi context prior to calling |
| * *any* of the other napi related functions. |
| */ |
| void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
| int (*poll)(struct napi_struct *, int), int weight); |
| |
| /** |
| * netif_napi_del - remove a napi context |
| * @napi: napi context |
| * |
| * netif_napi_del() removes a napi context from the network device napi list |
| */ |
| void netif_napi_del(struct napi_struct *napi); |
| |
| struct napi_gro_cb { |
| /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
| void *frag0; |
| |
| /* Length of frag0. */ |
| unsigned int frag0_len; |
| |
| /* This indicates where we are processing relative to skb->data. */ |
| int data_offset; |
| |
| /* This is non-zero if the packet cannot be merged with the new skb. */ |
| int flush; |
| |
| /* Number of segments aggregated. */ |
| u16 count; |
| |
| /* This is non-zero if the packet may be of the same flow. */ |
| u8 same_flow; |
| |
| /* Free the skb? */ |
| u8 free; |
| #define NAPI_GRO_FREE 1 |
| #define NAPI_GRO_FREE_STOLEN_HEAD 2 |
| |
| /* jiffies when first packet was created/queued */ |
| unsigned long age; |
| |
| /* Used in ipv6_gro_receive() */ |
| int proto; |
| |
| /* used in skb_gro_receive() slow path */ |
| struct sk_buff *last; |
| }; |
| |
| #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) |
| |
| struct packet_type { |
| __be16 type; /* This is really htons(ether_type). */ |
| struct net_device *dev; /* NULL is wildcarded here */ |
| int (*func) (struct sk_buff *, |
| struct net_device *, |
| struct packet_type *, |
| struct net_device *); |
| bool (*id_match)(struct packet_type *ptype, |
| struct sock *sk); |
| void *af_packet_priv; |
| struct list_head list; |
| }; |
| |
| struct offload_callbacks { |
| struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
| netdev_features_t features); |
| int (*gso_send_check)(struct sk_buff *skb); |
| struct sk_buff **(*gro_receive)(struct sk_buff **head, |
| struct sk_buff *skb); |
| int (*gro_complete)(struct sk_buff *skb); |
| }; |
| |
| struct packet_offload { |
| __be16 type; /* This is really htons(ether_type). */ |
| struct offload_callbacks callbacks; |
| struct list_head list; |
| }; |
| |
| #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 |
| #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 |
| |
| int register_netdevice_notifier(struct notifier_block *nb); |
| int unregister_netdevice_notifier(struct notifier_block *nb); |
| |
| struct netdev_notifier_info { |
| struct net_device *dev; |
| }; |
| |
| struct netdev_notifier_change_info { |
| struct netdev_notifier_info info; /* must be first */ |
| unsigned int flags_changed; |
| }; |
| |
| static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
| struct net_device *dev) |
| { |
| info->dev = dev; |
| } |
| |
| static inline struct net_device * |
| netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) |
| { |
| return info->dev; |
| } |
| |
| int call_netdevice_notifiers_info(unsigned long val, struct net_device *dev, |
| struct netdev_notifier_info *info); |
| 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); |
| void __dev_remove_offload(struct packet_offload *po); |
| |
| struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
| unsigned short mask); |
| struct net_device *dev_get_by_name(struct net *net, const char *name); |
| struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
| struct net_device *__dev_get_by_name(struct net *net, const char *name); |
| int dev_alloc_name(struct net_device *dev, const char *name); |
| int dev_open(struct net_device *dev); |
| int dev_close(struct net_device *dev); |
| void dev_disable_lro(struct net_device *dev); |
| int dev_loopback_xmit(struct sk_buff *newskb); |
| int dev_queue_xmit(struct sk_buff *skb); |
| 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 synchronize_net(void); |
| int init_dummy_netdev(struct net_device *dev); |
| |
| struct net_device *dev_get_by_index(struct net *net, int ifindex); |
| struct net_device *__dev_get_by_index(struct net *net, int ifindex); |
| struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
| int netdev_get_name(struct net *net, char *name, int ifindex); |
| int dev_restart(struct net_device *dev); |
| #ifdef CONFIG_NETPOLL_TRAP |
| int netpoll_trap(void); |
| #endif |
| int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
| |
| static inline unsigned int skb_gro_offset(const struct sk_buff *skb) |
| { |
| return NAPI_GRO_CB(skb)->data_offset; |
| } |
| |
| static inline unsigned int skb_gro_len(const struct sk_buff *skb) |
| { |
| return skb->len - NAPI_GRO_CB(skb)->data_offset; |
| } |
| |
| static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) |
| { |
| NAPI_GRO_CB(skb)->data_offset += len; |
| } |
| |
| static inline void *skb_gro_header_fast(struct sk_buff *skb, |
| unsigned int offset) |
| { |
| return NAPI_GRO_CB(skb)->frag0 + offset; |
| } |
| |
| static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
| { |
| return NAPI_GRO_CB(skb)->frag0_len < hlen; |
| } |
| |
| static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
| unsigned int offset) |
| { |
| if (!pskb_may_pull(skb, hlen)) |
| return NULL; |
| |
| NAPI_GRO_CB(skb)->frag0 = NULL; |
| NAPI_GRO_CB(skb)->frag0_len = 0; |
| return skb->data + offset; |
| } |
| |
| static inline void *skb_gro_mac_header(struct sk_buff *skb) |
| { |
| return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
| } |
| |
| 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 int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, |
| const void *daddr, const void *saddr, |
| unsigned int len) |
| { |
| if (!dev->header_ops || !dev->header_ops->create) |
| return 0; |
| |
| return dev->header_ops->create(skb, dev, type, daddr, saddr, len); |
| } |
| |
| static inline int dev_parse_header(const struct sk_buff *skb, |
| unsigned char *haddr) |
| { |
| const struct net_device *dev = skb->dev; |
| |
| if (!dev->header_ops || !dev->header_ops->parse) |
| return 0; |
| return dev->header_ops->parse(skb, haddr); |
| } |
| |
| typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
| int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
| static inline int unregister_gifconf(unsigned int family) |
| { |
| return register_gifconf(family, NULL); |
| } |
| |
| #ifdef CONFIG_NET_FLOW_LIMIT |
| #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
| struct sd_flow_limit { |
| u64 count; |
| unsigned int num_buckets; |
| unsigned int history_head; |
| u16 history[FLOW_LIMIT_HISTORY]; |
| u8 buckets[]; |
| }; |
| |
| extern int netdev_flow_limit_table_len; |
| #endif /* CONFIG_NET_FLOW_LIMIT */ |
| |
| /* |
| * Incoming packets are placed on per-cpu queues |
| */ |
| struct softnet_data { |
| struct Qdisc *output_queue; |
| struct Qdisc **output_queue_tailp; |
| struct list_head poll_list; |
| struct sk_buff *completion_queue; |
| struct sk_buff_head process_queue; |
| |
| /* stats */ |
| unsigned int processed; |
| unsigned int time_squeeze; |
| unsigned int cpu_collision; |
| unsigned int received_rps; |
| |
| #ifdef CONFIG_RPS |
| struct softnet_data *rps_ipi_list; |
| |
| /* Elements below can be accessed between CPUs for RPS */ |
| struct call_single_data csd ____cacheline_aligned_in_smp; |
| struct softnet_data *rps_ipi_next; |
| unsigned int cpu; |
| unsigned int input_queue_head; |
| unsigned int input_queue_tail; |
| #endif |
| unsigned int dropped; |
| struct sk_buff_head input_pkt_queue; |
| struct napi_struct backlog; |
| |
| #ifdef CONFIG_NET_FLOW_LIMIT |
| struct sd_flow_limit __rcu *flow_limit; |
| #endif |
| }; |
| |
| 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); |
| |
| static inline void netif_schedule_queue(struct netdev_queue *txq) |
| { |
| if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
| __netif_schedule(txq->qdisc); |
| } |
| |
| static inline void netif_tx_schedule_all(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) |
| netif_schedule_queue(netdev_get_tx_queue(dev, i)); |
| } |
| |
| static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
| { |
| clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| } |
| |
| /** |
| * netif_start_queue - allow transmit |
| * @dev: network device |
| * |
| * Allow upper layers to call the device hard_start_xmit routine. |
| */ |
| static inline void netif_start_queue(struct net_device *dev) |
| { |
| netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline void netif_tx_start_all_queues(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| netif_tx_start_queue(txq); |
| } |
| } |
| |
| static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
| { |
| #ifdef CONFIG_NETPOLL_TRAP |
| if (netpoll_trap()) { |
| netif_tx_start_queue(dev_queue); |
| return; |
| } |
| #endif |
| if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
| __netif_schedule(dev_queue->qdisc); |
| } |
| |
| /** |
| * netif_wake_queue - restart transmit |
| * @dev: network device |
| * |
| * Allow upper layers to call the device hard_start_xmit routine. |
| * Used for flow control when transmit resources are available. |
| */ |
| static inline void netif_wake_queue(struct net_device *dev) |
| { |
| netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline void netif_tx_wake_all_queues(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| netif_tx_wake_queue(txq); |
| } |
| } |
| |
| static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
| { |
| if (WARN_ON(!dev_queue)) { |
| pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
| return; |
| } |
| set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| } |
| |
| /** |
| * netif_stop_queue - stop transmitted packets |
| * @dev: network device |
| * |
| * Stop upper layers calling the device hard_start_xmit routine. |
| * Used for flow control when transmit resources are unavailable. |
| */ |
| static inline void netif_stop_queue(struct net_device *dev) |
| { |
| netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline void netif_tx_stop_all_queues(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| netif_tx_stop_queue(txq); |
| } |
| } |
| |
| static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
| { |
| return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
| } |
| |
| /** |
| * netif_queue_stopped - test if transmit queue is flowblocked |
| * @dev: network device |
| * |
| * Test if transmit queue on device is currently unable to send. |
| */ |
| static inline bool netif_queue_stopped(const struct net_device *dev) |
| { |
| return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
| { |
| return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
| } |
| |
| static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
| { |
| return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; |
| } |
| |
| static inline 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)); |
| } |
| |
| /** |
| * 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); |
| #ifdef CONFIG_NETPOLL_TRAP |
| if (netpoll_trap()) |
| return; |
| #endif |
| 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); |
| #ifdef CONFIG_NETPOLL_TRAP |
| if (netpoll_trap()) |
| return; |
| #endif |
| if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
| __netif_schedule(txq->qdisc); |
| } |
| |
| #ifdef CONFIG_XPS |
| int netif_set_xps_queue(struct net_device *dev, struct cpumask *mask, |
| u16 index); |
| #else |
| static inline int netif_set_xps_queue(struct net_device *dev, |
| struct cpumask *mask, |
| u16 index) |
| { |
| return 0; |
| } |
| #endif |
| |
| /* |
| * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used |
| * as a distribution range limit for the returned value. |
| */ |
| static inline u16 skb_tx_hash(const struct net_device *dev, |
| const 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_RPS |
| 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 |
| |
| static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
| const struct net_device *from_dev) |
| { |
| int err; |
| |
| err = netif_set_real_num_tx_queues(to_dev, |
| from_dev->real_num_tx_queues); |
| if (err) |
| return err; |
| #ifdef CONFIG_RPS |
| return netif_set_real_num_rx_queues(to_dev, |
| from_dev->real_num_rx_queues); |
| #else |
| return 0; |
| #endif |
| } |
| |
| #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
| int netif_get_num_default_rss_queues(void); |
| |
| /* Use this variant when it is known for sure that it |
| * is executing from hardware interrupt context or with hardware interrupts |
| * disabled. |
| */ |
| void dev_kfree_skb_irq(struct sk_buff *skb); |
| |
| /* Use this variant in places where it could be invoked |
| * from either hardware interrupt or other context, with hardware interrupts |
| * either disabled or enabled. |
| */ |
| void dev_kfree_skb_any(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); |
| |
| static inline void napi_free_frags(struct napi_struct *napi) |
| { |
| kfree_skb(napi->skb); |
| napi->skb = NULL; |
| } |
| |
| int netdev_rx_handler_register(struct net_device *dev, |
| rx_handler_func_t *rx_handler, |
| void *rx_handler_data); |
| void netdev_rx_handler_unregister(struct net_device *dev); |
| |
| bool dev_valid_name(const char *name); |
| int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
| int dev_ethtool(struct net *net, struct ifreq *); |
| unsigned int dev_get_flags(const struct net_device *); |
| int __dev_change_flags(struct net_device *, unsigned int flags); |
| int dev_change_flags(struct net_device *, unsigned int); |
| void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
| int dev_change_name(struct net_device *, const char *); |
| int dev_set_alias(struct net_device *, const char *, size_t); |
| int dev_change_net_namespace(struct net_device *, struct net *, const char *); |
| int dev_set_mtu(struct net_device *, int); |
| void dev_set_group(struct net_device *, int); |
| int dev_set_mac_address(struct net_device *, struct sockaddr *); |
| int dev_change_carrier(struct net_device *, bool new_carrier); |
| int dev_get_phys_port_id(struct net_device *dev, |
| struct netdev_phys_port_id *ppid); |
| int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
| struct netdev_queue *txq); |
| int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
| |
| extern int netdev_budget; |
| |
| /* Called by rtnetlink.c:rtnl_unlock() */ |
| void netdev_run_todo(void); |
| |
| /** |
| * dev_put - release reference to device |
| * @dev: network device |
| * |
| * Release reference to device to allow it to be freed. |
| */ |
| static inline void dev_put(struct net_device *dev) |
| { |
| this_cpu_dec(*dev->pcpu_refcnt); |
| } |
| |
| /** |
| * dev_hold - get reference to device |
| * @dev: network device |
| * |
| * Hold reference to device to keep it from being freed. |
| */ |
| static inline void dev_hold(struct net_device *dev) |
| { |
| this_cpu_inc(*dev->pcpu_refcnt); |
| } |
| |
| /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
| * and _off may be called from IRQ context, but it is caller |
| * who is responsible for serialization of these calls. |
| * |
| * The name carrier is inappropriate, these functions should really be |
| * called netif_lowerlayer_*() because they represent the state of any |
| * kind of lower layer not just hardware media. |
| */ |
| |
| void linkwatch_init_dev(struct net_device *dev); |
| void linkwatch_fire_event(struct net_device *dev); |
| void linkwatch_forget_dev(struct net_device *dev); |
| |
| /** |
| * netif_carrier_ok - test if carrier present |
| * @dev: network device |
| * |
| * Check if carrier is present on device |
| */ |
| static inline bool netif_carrier_ok(const struct net_device *dev) |
| { |
| return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
| } |
| |
| unsigned long dev_trans_start(struct net_device *dev); |
| |
| void __netdev_watchdog_up(struct net_device *dev); |
| |
| void netif_carrier_on(struct net_device *dev); |
| |
| void netif_carrier_off(struct net_device *dev); |
| |
| /** |
| * netif_dormant_on - mark device as dormant. |
| * @dev: network device |
| * |
| * Mark device as dormant (as per RFC2863). |
| * |
| * The dormant state indicates that the relevant interface is not |
| * actually in a condition to pass packets (i.e., it is not 'up') but is |
| * in a "pending" state, waiting for some external event. For "on- |
| * demand" interfaces, this new state identifies the situation where the |
| * interface is waiting for events to place it in the up state. |
| * |
| */ |
| static inline void netif_dormant_on(struct net_device *dev) |
| { |
| if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) |
| linkwatch_fire_event(dev); |
| } |
| |
| /** |
| * netif_dormant_off - set device as not dormant. |
| * @dev: network device |
| * |
| * Device is not in dormant state. |
| */ |
| static inline void netif_dormant_off(struct net_device *dev) |
| { |
| if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) |
| linkwatch_fire_event(dev); |
| } |
| |
| /** |
| * netif_dormant - test if carrier present |
| * @dev: network device |
| * |
| * Check if carrier is present on device |
| */ |
| static inline bool netif_dormant(const struct net_device *dev) |
| { |
| return test_bit(__LINK_STATE_DORMANT, &dev->state); |
| } |
| |
| |
| /** |
| * netif_oper_up - test if device is operational |
| * @dev: network device |
| * |
| * Check if carrier is operational |
| */ |
| static inline bool netif_oper_up(const struct net_device *dev) |
| { |
| return (dev->operstate == IF_OPER_UP || |
| dev->operstate == IF_OPER_UNKNOWN /* backward compat */); |
| } |
| |
| /** |
| * netif_device_present - is device available or removed |
| * @dev: network device |
| * |
| * Check if device has not been removed from system. |
| */ |
| static inline bool netif_device_present(struct net_device *dev) |
| { |
| return test_bit(__LINK_STATE_PRESENT, &dev->state); |
| } |
| |
| void netif_device_detach(struct net_device *dev); |
| |
| void netif_device_attach(struct net_device *dev); |
| |
| /* |
| * Network interface message level settings |
| */ |
| |
| enum { |
| NETIF_MSG_DRV = 0x0001, |
| NETIF_MSG_PROBE = 0x0002, |
| NETIF_MSG_LINK = 0x0004, |
| NETIF_MSG_TIMER = 0x0008, |
| NETIF_MSG_IFDOWN = 0x0010, |
| NETIF_MSG_IFUP = 0x0020, |
| NETIF_MSG_RX_ERR = 0x0040, |
| NETIF_MSG_TX_ERR = 0x0080, |
| NETIF_MSG_TX_QUEUED = 0x0100, |
| NETIF_MSG_INTR = 0x0200, |
| NETIF_MSG_TX_DONE = 0x0400, |
| NETIF_MSG_RX_STATUS = 0x0800, |
| NETIF_MSG_PKTDATA = 0x1000, |
| NETIF_MSG_HW = 0x2000, |
| NETIF_MSG_WOL = 0x4000, |
| }; |
| |
| #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
| #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
| #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
| #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
| #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
| #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
| #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
| #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
| #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
| #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
| #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
| #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
| #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
| #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
| #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
| |
| static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) |
| { |
| /* use default */ |
| if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) |
| return default_msg_enable_bits; |
| if (debug_value == 0) /* no output */ |
| return 0; |
| /* set low N bits */ |
| return (1 << debug_value) - 1; |
| } |
| |
| static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
| { |
| spin_lock(&txq->_xmit_lock); |
| txq->xmit_lock_owner = cpu; |
| } |
| |
| static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
| { |
| spin_lock_bh(&txq->_xmit_lock); |
| txq->xmit_lock_owner = smp_processor_id(); |
| } |
| |
| static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
| { |
| bool ok = spin_trylock(&txq->_xmit_lock); |
| if (likely(ok)) |
| txq->xmit_lock_owner = smp_processor_id(); |
| return ok; |
| } |
| |
| static inline void __netif_tx_unlock(struct netdev_queue *txq) |
| { |
| txq->xmit_lock_owner = -1; |
| spin_unlock(&txq->_xmit_lock); |
| } |
| |
| static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) |
| { |
| txq->xmit_lock_owner = -1; |
| spin_unlock_bh(&txq->_xmit_lock); |
| } |
| |
| static inline void txq_trans_update(struct netdev_queue *txq) |
| { |
| if (txq->xmit_lock_owner != -1) |
| txq->trans_start = jiffies; |
| } |
| |
| /** |
| * netif_tx_lock - grab network device transmit lock |
| * @dev: network device |
| * |
| * Get network device transmit lock |
| */ |
| static inline void netif_tx_lock(struct net_device *dev) |
| { |
| unsigned int i; |
| int cpu; |
| |
| spin_lock(&dev->tx_global_lock); |
| cpu = smp_processor_id(); |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| |
| /* We are the only thread of execution doing a |
| * freeze, but we have to grab the _xmit_lock in |
| * order to synchronize with threads which are in |
| * the ->hard_start_xmit() handler and already |
| * checked the frozen bit. |
| */ |
| __netif_tx_lock(txq, cpu); |
| set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
| __netif_tx_unlock(txq); |
| } |
| } |
| |
| static inline void netif_tx_lock_bh(struct net_device *dev) |
| { |
| local_bh_disable(); |
| netif_tx_lock(dev); |
| } |
| |
| static inline void netif_tx_unlock(struct net_device *dev) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| |
| /* No need to grab the _xmit_lock here. If the |
| * queue is not stopped for another reason, we |
| * force a schedule. |
| */ |
| clear_bit(__QUEUE_STATE_FROZEN, &txq->state); |
| netif_schedule_queue(txq); |
| } |
| spin_unlock(&dev->tx_global_lock); |
| } |
| |
| static inline void netif_tx_unlock_bh(struct net_device *dev) |
| { |
| netif_tx_unlock(dev); |
| local_bh_enable(); |
| } |
| |
| #define HARD_TX_LOCK(dev, txq, cpu) { \ |
| if ((dev->features & NETIF_F_LLTX) == 0) { \ |
| __netif_tx_lock(txq, cpu); \ |
| } \ |
| } |
| |
| #define HARD_TX_UNLOCK(dev, txq) { \ |
| if ((dev->features & NETIF_F_LLTX) == 0) { \ |
| __netif_tx_unlock(txq); \ |
| } \ |
| } |
| |
| static inline void netif_tx_disable(struct net_device *dev) |
| { |
| unsigned int i; |
| int cpu; |
| |
| local_bh_disable(); |
| cpu = smp_processor_id(); |
| for (i = 0; i < dev->num_tx_queues; i++) { |
| struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
| |
| __netif_tx_lock(txq, cpu); |
| netif_tx_stop_queue(txq); |
| __netif_tx_unlock(txq); |
| } |
| local_bh_enable(); |
| } |
| |
| static inline void netif_addr_lock(struct net_device *dev) |
| { |
| spin_lock(&dev->addr_list_lock); |
| } |
| |
| static inline void netif_addr_lock_nested(struct net_device *dev) |
| { |
| spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); |
| } |
| |
| static inline void netif_addr_lock_bh(struct net_device *dev) |
| { |
| spin_lock_bh(&dev->addr_list_lock); |
| } |
| |
| static inline void netif_addr_unlock(struct net_device *dev) |
| { |
| spin_unlock(&dev->addr_list_lock); |
| } |
| |
| static inline void netif_addr_unlock_bh(struct net_device *dev) |
| { |
| spin_unlock_bh(&dev->addr_list_lock); |
| } |
| |
| /* |
| * dev_addrs walker. Should be used only for read access. Call with |
| * rcu_read_lock held. |
| */ |
| #define for_each_dev_addr(dev, ha) \ |
| list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
| |
| /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
| |
| void ether_setup(struct net_device *dev); |
| |
| /* Support for loadable net-drivers */ |
| struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
| void (*setup)(struct net_device *), |
| unsigned int txqs, unsigned int rxqs); |
| #define alloc_netdev(sizeof_priv, name, setup) \ |
| alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
| |
| #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ |
| alloc_netdev_mqs(sizeof_priv, name, setup, count, count) |
| |
| int register_netdev(struct net_device *dev); |
| void unregister_netdev(struct net_device *dev); |
| |
| /* General hardware address lists handling functions */ |
| int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, |
| struct netdev_hw_addr_list *from_list, |
| int addr_len, unsigned char addr_type); |
| void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
| struct netdev_hw_addr_list *from_list, |
| int addr_len, unsigned char addr_type); |
| int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| struct netdev_hw_addr_list *from_list, int addr_len); |
| void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| struct netdev_hw_addr_list *from_list, int addr_len); |
| void __hw_addr_flush(struct netdev_hw_addr_list *list); |
| void __hw_addr_init(struct netdev_hw_addr_list *list); |
| |
| /* Functions used for device addresses handling */ |
| int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
| unsigned char addr_type); |
| int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
| unsigned char addr_type); |
| int dev_addr_add_multiple(struct net_device *to_dev, |
| struct net_device *from_dev, unsigned char addr_type); |
| int dev_addr_del_multiple(struct net_device *to_dev, |
| struct net_device *from_dev, unsigned char addr_type); |
| void dev_addr_flush(struct net_device *dev); |
| int dev_addr_init(struct net_device *dev); |
| |
| /* Functions used for unicast addresses handling */ |
| int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
| int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); |
| int dev_uc_del(struct net_device *dev, const unsigned char *addr); |
| int dev_uc_sync(struct net_device *to, struct net_device *from); |
| int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); |
| void dev_uc_unsync(struct net_device *to, struct net_device *from); |
| void dev_uc_flush(struct net_device *dev); |
| void dev_uc_init(struct net_device *dev); |
| |
| /* Functions used for multicast addresses handling */ |
| int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
| int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); |
| int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); |
| int dev_mc_del(struct net_device *dev, const unsigned char *addr); |
| int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); |
| int dev_mc_sync(struct net_device *to, struct net_device *from); |
| int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); |
| void dev_mc_unsync(struct net_device *to, struct net_device *from); |
| void dev_mc_flush(struct net_device *dev); |
| void dev_mc_init(struct net_device *dev); |
| |
| /* Functions used for secondary unicast and multicast support */ |
| void dev_set_rx_mode(struct net_device *dev); |
| void __dev_set_rx_mode(struct net_device *dev); |
| int dev_set_promiscuity(struct net_device *dev, int inc); |
| int dev_set_allmulti(struct net_device *dev, int inc); |
| void netdev_state_change(struct net_device *dev); |
| void netdev_notify_peers(struct net_device *dev); |
| void netdev_features_change(struct net_device *dev); |
| /* Load a device via the kmod */ |
| void dev_load(struct net *net, const char *name); |
| struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
| struct rtnl_link_stats64 *storage); |
| void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, |
| const struct net_device_stats *netdev_stats); |
| |
| extern int netdev_max_backlog; |
| extern int netdev_tstamp_prequeue; |
| extern int weight_p; |
| extern int bpf_jit_enable; |
| |
| bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
| bool netdev_has_any_upper_dev(struct net_device *dev); |
| struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
| struct list_head **iter); |
| |
| /* iterate through upper list, must be called under RCU read lock */ |
| #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \ |
| for (iter = &(dev)->all_adj_list.upper, \ |
| updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \ |
| updev; \ |
| updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter))) |
| |
| void *netdev_lower_get_next_private(struct net_device *dev, |
| struct list_head **iter); |
| void *netdev_lower_get_next_private_rcu(struct net_device *dev, |
| struct list_head **iter); |
| |
| #define netdev_for_each_lower_private(dev, priv, iter) \ |
| for (iter = (dev)->adj_list.lower.next, \ |
| priv = netdev_lower_get_next_private(dev, &(iter)); \ |
| priv; \ |
| priv = netdev_lower_get_next_private(dev, &(iter))) |
| |
| #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ |
| for (iter = &(dev)->adj_list.lower, \ |
| priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ |
| priv; \ |
| priv = netdev_lower_get_next_private_rcu(dev, &(iter))) |
| |
| void *netdev_adjacent_get_private(struct list_head *adj_list); |
| struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
| struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); |
| int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev); |
| int netdev_master_upper_dev_link(struct net_device *dev, |
| struct net_device *upper_dev); |
| int netdev_master_upper_dev_link_private(struct net_device *dev, |
| struct net_device *upper_dev, |
| void *private); |
| void netdev_upper_dev_unlink(struct net_device *dev, |
| struct net_device *upper_dev); |
| void *netdev_lower_dev_get_private_rcu(struct net_device *dev, |
| struct net_device *lower_dev); |
| void *netdev_lower_dev_get_private(struct net_device *dev, |
| struct net_device *lower_dev); |
| int skb_checksum_help(struct sk_buff *skb); |
| struct sk_buff *__skb_gso_segment(struct sk_buff *skb, |
| netdev_features_t features, bool tx_path); |
| struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, |
| netdev_features_t features); |
| |
| static inline |
| struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) |
| { |
| return __skb_gso_segment(skb, features, true); |
| } |
| __be16 skb_network_protocol(struct sk_buff *skb); |
| |
| static inline bool can_checksum_protocol(netdev_features_t features, |
| __be16 protocol) |
| { |
| return ((features & NETIF_F_GEN_CSUM) || |
| ((features & NETIF_F_V4_CSUM) && |
| protocol == htons(ETH_P_IP)) || |
| ((features & NETIF_F_V6_CSUM) && |
| protocol == htons(ETH_P_IPV6)) || |
| ((features & NETIF_F_FCOE_CRC) && |
| protocol == htons(ETH_P_FCOE))); |
| } |
| |
| #ifdef CONFIG_BUG |
| void netdev_rx_csum_fault(struct net_device *dev); |
| #else |
| static inline void netdev_rx_csum_fault(struct net_device *dev) |
| { |
| } |
| #endif |
| /* rx skb timestamps */ |
| void net_enable_timestamp(void); |
| void net_disable_timestamp(void); |
| |
| #ifdef CONFIG_PROC_FS |
| int __init dev_proc_init(void); |
| #else |
| #define dev_proc_init() 0 |
| #endif |
| |
| int netdev_class_create_file(struct class_attribute *class_attr); |
| void netdev_class_remove_file(struct class_attribute *class_attr); |
| |
| extern struct kobj_ns_type_operations net_ns_type_operations; |
| |
| const char *netdev_drivername(const struct net_device *dev); |
| |
| void linkwatch_run_queue(void); |
| |
| static inline netdev_features_t netdev_get_wanted_features( |
| struct net_device *dev) |
| { |
| return (dev->features & ~dev->hw_features) | dev->wanted_features; |
| } |
| netdev_features_t netdev_increment_features(netdev_features_t all, |
| netdev_features_t one, netdev_features_t mask); |
| |
| /* Allow TSO being used on stacked device : |
| * Performing the GSO segmentation before last device |
| * is a performance improvement. |
| */ |
| static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, |
| netdev_features_t mask) |
| { |
| return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); |
| } |
| |
| int __netdev_update_features(struct net_device *dev); |
| void netdev_update_features(struct net_device *dev); |
| void netdev_change_features(struct net_device *dev); |
| |
| void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
| struct net_device *dev); |
| |
| netdev_features_t netif_skb_features(struct sk_buff *skb); |
| |
| static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
| { |
| netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
| |
| /* check flags correspondence */ |
| BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); |
| BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); |
| BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); |
| BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); |
| BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
| BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); |
| |
| return (features & feature) == feature; |
| } |
| |
| static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
| { |
| return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
| (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
| } |
| |
| static inline bool netif_needs_gso(struct sk_buff *skb, |
| netdev_features_t features) |
| { |
| return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
| unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
| (skb->ip_summed != CHECKSUM_UNNECESSARY))); |
| } |
| |
| static inline void netif_set_gso_max_size(struct net_device *dev, |
| unsigned int size) |
| { |
| dev->gso_max_size = size; |
| } |
| |
| static inline bool netif_is_bond_master(struct net_device *dev) |
| { |
| return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; |
| } |
| |
| static inline bool netif_is_bond_slave(struct net_device *dev) |
| { |
| return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; |
| } |
| |
| static inline bool netif_supports_nofcs(struct net_device *dev) |
| { |
| return dev->priv_flags & IFF_SUPP_NOFCS; |
| } |
| |
| extern struct pernet_operations __net_initdata loopback_net_ops; |
| |
| /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
| |
| /* netdev_printk helpers, similar to dev_printk */ |
| |
| static inline const char *netdev_name(const struct net_device *dev) |
| { |
| if (dev->reg_state != NETREG_REGISTERED) |
| return "(unregistered net_device)"; |
| return dev->name; |
| } |
| |
| __printf(3, 4) |
| int netdev_printk(const char *level, const struct net_device *dev, |
| const char *format, ...); |
| __printf(2, 3) |
| int netdev_emerg(const struct net_device *dev, const char *format, ...); |
| __printf(2, 3) |
| int netdev_alert(const struct net_device *dev, const char *format, ...); |
| __printf(2, 3) |
| int netdev_crit(const struct net_device *dev, const char *format, ...); |
| __printf(2, 3) |
| int netdev_err(const struct net_device *dev, const char *format, ...); |
| __printf(2, 3) |
| int netdev_warn(const struct net_device *dev, const char *format, ...); |
| __printf(2, 3) |
| int netdev_notice(const struct net_device *dev, const char *format, ...); |
| __printf(2, 3) |
| int netdev_info(const struct net_device *dev, const char *format, ...); |
| |
| #define MODULE_ALIAS_NETDEV(device) \ |
| MODULE_ALIAS("netdev-" device) |
| |
| #if defined(CONFIG_DYNAMIC_DEBUG) |
| #define netdev_dbg(__dev, format, args...) \ |
| do { \ |
| dynamic_netdev_dbg(__dev, format, ##args); \ |
| } while (0) |
| #elif defined(DEBUG) |
| #define netdev_dbg(__dev, format, args...) \ |
| netdev_printk(KERN_DEBUG, __dev, format, ##args) |
| #else |
| #define netdev_dbg(__dev, format, args...) \ |
| ({ \ |
| if (0) \ |
| netdev_printk(KERN_DEBUG, __dev, format, ##args); \ |
| 0; \ |
| }) |
| #endif |
| |
| #if defined(VERBOSE_DEBUG) |
| #define netdev_vdbg netdev_dbg |
| #else |
| |
| #define netdev_vdbg(dev, format, args...) \ |
| ({ \ |
| if (0) \ |
| netdev_printk(KERN_DEBUG, dev, format, ##args); \ |
| 0; \ |
| }) |
| #endif |
| |
| /* |
| * netdev_WARN() acts like dev_printk(), but with the key difference |
| * of using a WARN/WARN_ON to get the message out, including the |
| * file/line information and a backtrace. |
| */ |
| #define netdev_WARN(dev, format, args...) \ |
| WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); |
| |
| /* netif printk helpers, similar to netdev_printk */ |
| |
| #define netif_printk(priv, type, level, dev, fmt, args...) \ |
| do { \ |
| if (netif_msg_##type(priv)) \ |
| netdev_printk(level, (dev), fmt, ##args); \ |
| } while (0) |
| |
| #define netif_level(level, priv, type, dev, fmt, args...) \ |
| do { \ |
| if (netif_msg_##type(priv)) \ |
| netdev_##level(dev, fmt, ##args); \ |
| } while (0) |
| |
| #define netif_emerg(priv, type, dev, fmt, args...) \ |
| netif_level(emerg, priv, type, dev, fmt, ##args) |
| #define netif_alert(priv, type, dev, fmt, args...) \ |
| netif_level(alert, priv, type, dev, fmt, ##args) |
| #define netif_crit(priv, type, dev, fmt, args...) \ |
| netif_level(crit, priv, type, dev, fmt, ##args) |
| #define netif_err(priv, type, dev, fmt, args...) \ |
| netif_level(err, priv, type, dev, fmt, ##args) |
| #define netif_warn(priv, type, dev, fmt, args...) \ |
| netif_level(warn, priv, type, dev, fmt, ##args) |
| #define netif_notice(priv, type, dev, fmt, args...) \ |
| netif_level(notice, priv, type, dev, fmt, ##args) |
| #define netif_info(priv, type, dev, fmt, args...) \ |
| netif_level(info, priv, type, dev, fmt, ##args) |
| |
| #if defined(CONFIG_DYNAMIC_DEBUG) |
| #define netif_dbg(priv, type, netdev, format, args...) \ |
| do { \ |
| if (netif_msg_##type(priv)) \ |
| dynamic_netdev_dbg(netdev, format, ##args); \ |
| } while (0) |
| #elif defined(DEBUG) |
| #define netif_dbg(priv, type, dev, format, args...) \ |
| netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) |
| #else |
| #define netif_dbg(priv, type, dev, format, args...) \ |
| ({ \ |
| if (0) \ |
| netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
| 0; \ |
| }) |
| #endif |
| |
| #if defined(VERBOSE_DEBUG) |
| #define netif_vdbg netif_dbg |
| #else |
| #define netif_vdbg(priv, type, dev, format, args...) \ |
| ({ \ |
| if (0) \ |
| netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
| 0; \ |
| }) |
| #endif |
| |
| /* |
| * The list of packet types we will receive (as opposed to discard) |
| * and the routines to invoke. |
| * |
| * Why 16. Because with 16 the only overlap we get on a hash of the |
| * low nibble of the protocol value is RARP/SNAP/X.25. |
| * |
| * NOTE: That is no longer true with the addition of VLAN tags. Not |
| * sure which should go first, but I bet it won't make much |
| * difference if we are running VLANs. The good news is that |
| * this protocol won't be in the list unless compiled in, so |
| * the average user (w/out VLANs) will not be adversely affected. |
| * --BLG |
| * |
| * 0800 IP |
| * 8100 802.1Q VLAN |
| * 0001 802.3 |
| * 0002 AX.25 |
| * 0004 802.2 |
| * 8035 RARP |
| * 0005 SNAP |
| * 0805 X.25 |
| * 0806 ARP |
| * 8137 IPX |
| * 0009 Localtalk |
| * 86DD IPv6 |
| */ |
| #define PTYPE_HASH_SIZE (16) |
| #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) |
| |
| #endif /* _LINUX_NETDEVICE_H */ |