| /* |
| * 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/if.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_packet.h> |
| #include <linux/if_link.h> |
| |
| #ifdef __KERNEL__ |
| #include <linux/timer.h> |
| #include <linux/delay.h> |
| #include <linux/mm.h> |
| #include <asm/atomic.h> |
| #include <asm/cache.h> |
| #include <asm/byteorder.h> |
| |
| #include <linux/device.h> |
| #include <linux/percpu.h> |
| #include <linux/rculist.h> |
| #include <linux/dmaengine.h> |
| #include <linux/workqueue.h> |
| |
| #include <linux/ethtool.h> |
| #include <net/net_namespace.h> |
| #include <net/dsa.h> |
| #ifdef CONFIG_DCB |
| #include <net/dcbnl.h> |
| #endif |
| |
| struct vlan_group; |
| struct netpoll_info; |
| /* 802.11 specific */ |
| struct wireless_dev; |
| /* source back-compat hooks */ |
| #define SET_ETHTOOL_OPS(netdev,ops) \ |
| ( (netdev)->ethtool_ops = (ops) ) |
| |
| #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev |
| functions are available. */ |
| #define HAVE_FREE_NETDEV /* free_netdev() */ |
| #define HAVE_NETDEV_PRIV /* netdev_priv() */ |
| |
| /* 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; |
| } |
| |
| #endif |
| |
| #define MAX_ADDR_LEN 32 /* Largest hardware address length */ |
| |
| #ifdef __KERNEL__ |
| /* |
| * Compute the worst case header length according to the protocols |
| * used. |
| */ |
| |
| #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) |
| # if defined(CONFIG_MAC80211_MESH) |
| # define LL_MAX_HEADER 128 |
| # else |
| # define LL_MAX_HEADER 96 |
| # endif |
| #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) |
| # define LL_MAX_HEADER 48 |
| #else |
| # define LL_MAX_HEADER 32 |
| #endif |
| |
| #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ |
| !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ |
| !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ |
| !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) |
| #define MAX_HEADER LL_MAX_HEADER |
| #else |
| #define MAX_HEADER (LL_MAX_HEADER + 48) |
| #endif |
| |
| #endif /* __KERNEL__ */ |
| |
| /* |
| * Network device statistics. Akin to the 2.0 ether stats but |
| * with byte counters. |
| */ |
| |
| struct net_device_stats { |
| unsigned long rx_packets; /* total packets received */ |
| unsigned long tx_packets; /* total packets transmitted */ |
| unsigned long rx_bytes; /* total bytes received */ |
| unsigned long tx_bytes; /* total bytes transmitted */ |
| unsigned long rx_errors; /* bad packets received */ |
| unsigned long tx_errors; /* packet transmit problems */ |
| unsigned long rx_dropped; /* no space in linux buffers */ |
| unsigned long tx_dropped; /* no space available in linux */ |
| unsigned long multicast; /* multicast packets received */ |
| unsigned long collisions; |
| |
| /* detailed rx_errors: */ |
| unsigned long rx_length_errors; |
| unsigned long rx_over_errors; /* receiver ring buff overflow */ |
| unsigned long rx_crc_errors; /* recved pkt with crc error */ |
| unsigned long rx_frame_errors; /* recv'd frame alignment error */ |
| unsigned long rx_fifo_errors; /* recv'r fifo overrun */ |
| unsigned long rx_missed_errors; /* receiver missed packet */ |
| |
| /* detailed tx_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; |
| |
| /* for cslip etc */ |
| unsigned long rx_compressed; |
| unsigned long tx_compressed; |
| }; |
| |
| |
| /* Media selection options. */ |
| enum { |
| IF_PORT_UNKNOWN = 0, |
| IF_PORT_10BASE2, |
| IF_PORT_10BASET, |
| IF_PORT_AUI, |
| IF_PORT_100BASET, |
| IF_PORT_100BASETX, |
| IF_PORT_100BASEFX |
| }; |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/cache.h> |
| #include <linux/skbuff.h> |
| |
| struct neighbour; |
| struct neigh_parms; |
| struct sk_buff; |
| |
| struct netif_rx_stats { |
| unsigned total; |
| unsigned dropped; |
| unsigned time_squeeze; |
| unsigned cpu_collision; |
| unsigned received_rps; |
| }; |
| |
| DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); |
| |
| 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 |
| int refcount; |
| bool synced; |
| bool global_use; |
| 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 { |
| struct hh_cache *hh_next; /* Next entry */ |
| atomic_t hh_refcnt; /* number of users */ |
| /* |
| * We want hh_output, hh_len, hh_lock and hh_data be a in a separate |
| * cache line on SMP. |
| * They are mostly read, but hh_refcnt may be changed quite frequently, |
| * incurring cache line ping pongs. |
| */ |
| __be16 hh_type ____cacheline_aligned_in_smp; |
| /* protocol identifier, f.e ETH_P_IP |
| * NOTE: For VLANs, this will be the |
| * encapuslated type. --BLG |
| */ |
| u16 hh_len; /* length of header */ |
| int (*hh_output)(struct sk_buff *skb); |
| 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. |
| * |
| * LL_ALLOCATED_SPACE also takes into account the tailroom the device |
| * may need. |
| */ |
| #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) |
| #define LL_ALLOCATED_SPACE(dev) \ |
| ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(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 len); |
| int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
| int (*rebuild)(struct sk_buff *skb); |
| #define HAVE_HEADER_CACHE |
| int (*cache)(const struct neighbour *neigh, struct hh_cache *hh); |
| 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 |
| |
| extern 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; |
| int (*poll)(struct napi_struct *, int); |
| #ifdef CONFIG_NETPOLL |
| spinlock_t poll_lock; |
| int poll_owner; |
| #endif |
| |
| unsigned int gro_count; |
| |
| struct net_device *dev; |
| struct list_head dev_list; |
| struct sk_buff *gro_list; |
| struct sk_buff *skb; |
| }; |
| |
| enum { |
| NAPI_STATE_SCHED, /* Poll is scheduled */ |
| NAPI_STATE_DISABLE, /* Disable pending */ |
| NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
| }; |
| |
| enum gro_result { |
| GRO_MERGED, |
| GRO_MERGED_FREE, |
| GRO_HELD, |
| GRO_NORMAL, |
| GRO_DROP, |
| }; |
| typedef enum gro_result gro_result_t; |
| |
| extern void __napi_schedule(struct napi_struct *n); |
| |
| static inline int 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 int 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 int napi_reschedule(struct napi_struct *napi) |
| { |
| if (napi_schedule_prep(napi)) { |
| __napi_schedule(napi); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * napi_complete - NAPI processing complete |
| * @n: napi context |
| * |
| * Mark NAPI processing as complete. |
| */ |
| extern void __napi_complete(struct napi_struct *n); |
| extern void napi_complete(struct napi_struct *n); |
| |
| /** |
| * 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_XOFF, |
| __QUEUE_STATE_FROZEN, |
| }; |
| |
| struct netdev_queue { |
| /* |
| * read mostly part |
| */ |
| struct net_device *dev; |
| struct Qdisc *qdisc; |
| unsigned long state; |
| struct Qdisc *qdisc_sleeping; |
| /* |
| * 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; |
| unsigned long tx_bytes; |
| unsigned long tx_packets; |
| unsigned long tx_dropped; |
| } ____cacheline_aligned_in_smp; |
| |
| #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 and the |
| * tail pointer for that CPU's input queue at the time of last enqueue. |
| */ |
| struct rps_dev_flow { |
| u16 cpu; |
| u16 fill; |
| unsigned int last_qtail; |
| }; |
| |
| /* |
| * 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 work_struct free_work; |
| 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 *rps_sock_flow_table; |
| |
| /* This structure contains an instance of an RX queue. */ |
| struct netdev_rx_queue { |
| struct rps_map *rps_map; |
| struct rps_dev_flow_table *rps_flow_table; |
| struct kobject kobj; |
| struct netdev_rx_queue *first; |
| atomic_t count; |
| } ____cacheline_aligned_in_smp; |
| #endif /* CONFIG_RPS */ |
| |
| /* |
| * 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. |
| * |
| * void (*ndo_set_multicast_list)(struct net_device *dev); |
| * This function is called when the multicast address list changes. |
| * |
| * 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 net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| * Called when a user wants to get the network device usage |
| * statistics. If not defined, the counters in dev->stats will |
| * be used. |
| * |
| * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp); |
| * If device support VLAN receive accleration |
| * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called |
| * when vlan groups for the device changes. Note: grp is NULL |
| * if no vlan's groups are being used. |
| * |
| * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); |
| * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) |
| * this function is called when a VLAN id is registered. |
| * |
| * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
| * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) |
| * 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_get_vf_config)(struct net_device *dev, |
| * int vf, struct ifla_vf_info *ivf); |
| */ |
| #define HAVE_NET_DEVICE_OPS |
| 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); |
| void (*ndo_set_multicast_list)(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 net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
| |
| void (*ndo_vlan_rx_register)(struct net_device *dev, |
| struct vlan_group *grp); |
| void (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
| unsigned short vid); |
| void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
| unsigned short vid); |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| void (*ndo_poll_controller)(struct net_device *dev); |
| #endif |
| int (*ndo_set_vf_mac)(struct net_device *dev, |
| int queue, u8 *mac); |
| int (*ndo_set_vf_vlan)(struct net_device *dev, |
| int queue, u16 vlan, u8 qos); |
| int (*ndo_set_vf_tx_rate)(struct net_device *dev, |
| int vf, int rate); |
| int (*ndo_get_vf_config)(struct net_device *dev, |
| int vf, |
| struct ifla_vf_info *ivf); |
| #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| 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); |
| #define NETDEV_FCOE_WWNN 0 |
| #define NETDEV_FCOE_WWPN 1 |
| int (*ndo_fcoe_get_wwn)(struct net_device *dev, |
| u64 *wwn, int type); |
| #endif |
| }; |
| |
| /* |
| * 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 |
| * the interface. |
| */ |
| char name[IFNAMSIZ]; |
| /* device name hash chain */ |
| 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 char if_port; /* Selectable AUI, TP,..*/ |
| unsigned char dma; /* DMA channel */ |
| |
| unsigned long state; |
| |
| struct list_head dev_list; |
| struct list_head napi_list; |
| struct list_head unreg_list; |
| |
| /* Net device features */ |
| unsigned long features; |
| #define NETIF_F_SG 1 /* Scatter/gather IO. */ |
| #define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */ |
| #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */ |
| #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */ |
| #define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */ |
| #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */ |
| #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */ |
| #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */ |
| #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */ |
| #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */ |
| #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */ |
| #define NETIF_F_GSO 2048 /* Enable software GSO. */ |
| #define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */ |
| /* do not use LLTX in new drivers */ |
| #define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */ |
| #define NETIF_F_GRO 16384 /* Generic receive offload */ |
| #define NETIF_F_LRO 32768 /* large receive offload */ |
| |
| /* the GSO_MASK reserves bits 16 through 23 */ |
| #define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */ |
| #define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */ |
| #define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/ |
| #define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */ |
| #define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */ |
| |
| /* Segmentation offload features */ |
| #define NETIF_F_GSO_SHIFT 16 |
| #define NETIF_F_GSO_MASK 0x00ff0000 |
| #define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT) |
| #define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT) |
| #define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT) |
| #define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT) |
| #define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT) |
| #define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT) |
| |
| /* List of features with software fallbacks. */ |
| #define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6) |
| |
| |
| #define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM) |
| #define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM) |
| #define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM) |
| #define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM) |
| |
| /* |
| * If one device supports one of these features, then enable them |
| * for all in netdev_increment_features. |
| */ |
| #define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \ |
| NETIF_F_SG | NETIF_F_HIGHDMA | \ |
| NETIF_F_FRAGLIST) |
| |
| /* Interface index. Unique device identifier */ |
| int ifindex; |
| int iflink; |
| |
| struct net_device_stats stats; |
| |
| #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 short gflags; |
| unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */ |
| unsigned short padded; /* How much padding added by alloc_netdev() */ |
| |
| unsigned char operstate; /* RFC2863 operstate */ |
| unsigned char link_mode; /* mapping policy to operstate */ |
| |
| unsigned 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; |
| |
| struct net_device *master; /* Pointer to master device of a group, |
| * which this device is member of. |
| */ |
| |
| /* Interface address info. */ |
| unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
| unsigned char addr_len; /* hardware address length */ |
| unsigned short dev_id; /* for shared network cards */ |
| |
| spinlock_t addr_list_lock; |
| struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
| struct netdev_hw_addr_list mc; /* Multicast mac addresses */ |
| int uc_promisc; |
| unsigned int promiscuity; |
| unsigned int allmulti; |
| |
| |
| /* Protocol specific pointers */ |
| |
| #ifdef CONFIG_NET_DSA |
| void *dsa_ptr; /* dsa specific data */ |
| #endif |
| void *atalk_ptr; /* AppleTalk link */ |
| void *ip_ptr; /* IPv4 specific data */ |
| void *dn_ptr; /* DECnet specific data */ |
| void *ip6_ptr; /* IPv6 specific data */ |
| void *ec_ptr; /* Econet specific data */ |
| void *ax25_ptr; /* AX.25 specific data */ |
| struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
| assign before registering */ |
| |
| /* |
| * Cache line mostly used on receive path (including eth_type_trans()) |
| */ |
| unsigned long last_rx; /* Time of last Rx */ |
| /* Interface address info used in eth_type_trans() */ |
| unsigned char *dev_addr; /* hw address, (before bcast |
| because most packets are |
| unicast) */ |
| |
| struct netdev_hw_addr_list dev_addrs; /* list of device |
| hw addresses */ |
| |
| unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
| |
| #ifdef CONFIG_RPS |
| struct kset *queues_kset; |
| |
| struct netdev_rx_queue *_rx; |
| |
| /* Number of RX queues allocated at alloc_netdev_mq() time */ |
| unsigned int num_rx_queues; |
| #endif |
| |
| struct netdev_queue rx_queue; |
| |
| 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; |
| /* |
| * One part is mostly used on xmit path (device) |
| */ |
| /* 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 */ |
| atomic_t refcnt ____cacheline_aligned_in_smp; |
| |
| /* 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:16; |
| |
| 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 *npinfo; |
| #endif |
| |
| #ifdef CONFIG_NET_NS |
| /* Network namespace this network device is inside */ |
| struct net *nd_net; |
| #endif |
| |
| /* mid-layer private */ |
| void *ml_priv; |
| |
| /* bridge stuff */ |
| struct net_bridge_port *br_port; |
| /* macvlan */ |
| struct macvlan_port *macvlan_port; |
| /* GARP */ |
| struct garp_port *garp_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; |
| |
| /* VLAN feature mask */ |
| unsigned long vlan_features; |
| |
| /* for setting kernel sock attribute on TCP connection setup */ |
| #define GSO_MAX_SIZE 65536 |
| unsigned int gso_max_size; |
| |
| #ifdef CONFIG_DCB |
| /* Data Center Bridging netlink ops */ |
| const struct dcbnl_rtnl_ops *dcbnl_ops; |
| #endif |
| |
| #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
| /* max exchange id for FCoE LRO by ddp */ |
| unsigned int fcoe_ddp_xid; |
| #endif |
| /* n-tuple filter list attached to this device */ |
| struct ethtool_rx_ntuple_list ethtool_ntuple_list; |
| }; |
| #define to_net_dev(d) container_of(d, struct net_device, dev) |
| |
| #define NETDEV_ALIGN 32 |
| |
| 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); |
| } |
| |
| /* |
| * Net namespace inlines |
| */ |
| static inline |
| struct net *dev_net(const struct net_device *dev) |
| { |
| #ifdef CONFIG_NET_NS |
| return dev->nd_net; |
| #else |
| return &init_net; |
| #endif |
| } |
| |
| 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; |
| } |
| |
| #ifndef CONFIG_NET_NS |
| static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) |
| { |
| skb->dev = dev; |
| } |
| #else /* CONFIG_NET_NS */ |
| void skb_set_dev(struct sk_buff *skb, struct net_device *dev); |
| #endif |
| |
| 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)) |
| |
| /** |
| * 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 may be of the same flow. */ |
| int same_flow; |
| |
| /* This is non-zero if the packet cannot be merged with the new skb. */ |
| int flush; |
| |
| /* Number of segments aggregated. */ |
| int count; |
| |
| /* Free the skb? */ |
| int free; |
| }; |
| |
| #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 *); |
| struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
| int 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); |
| void *af_packet_priv; |
| struct list_head list; |
| }; |
| |
| #include <linux/interrupt.h> |
| #include <linux/notifier.h> |
| |
| 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 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(dev->dev_list.next); |
| 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); |
| } |
| |
| extern int netdev_boot_setup_check(struct net_device *dev); |
| extern unsigned long netdev_boot_base(const char *prefix, int unit); |
| extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr); |
| extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
| extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); |
| extern void dev_add_pack(struct packet_type *pt); |
| extern void dev_remove_pack(struct packet_type *pt); |
| extern void __dev_remove_pack(struct packet_type *pt); |
| |
| extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags, |
| unsigned short mask); |
| extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
| extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
| extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
| extern int dev_alloc_name(struct net_device *dev, const char *name); |
| extern int dev_open(struct net_device *dev); |
| extern int dev_close(struct net_device *dev); |
| extern void dev_disable_lro(struct net_device *dev); |
| extern int dev_queue_xmit(struct sk_buff *skb); |
| extern int register_netdevice(struct net_device *dev); |
| extern void unregister_netdevice_queue(struct net_device *dev, |
| struct list_head *head); |
| extern void unregister_netdevice_many(struct list_head *head); |
| static inline void unregister_netdevice(struct net_device *dev) |
| { |
| unregister_netdevice_queue(dev, NULL); |
| } |
| |
| extern void free_netdev(struct net_device *dev); |
| extern void synchronize_net(void); |
| extern int register_netdevice_notifier(struct notifier_block *nb); |
| extern int unregister_netdevice_notifier(struct notifier_block *nb); |
| extern int init_dummy_netdev(struct net_device *dev); |
| extern void netdev_resync_ops(struct net_device *dev); |
| |
| extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
| extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
| extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); |
| extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
| extern int dev_restart(struct net_device *dev); |
| #ifdef CONFIG_NETPOLL_TRAP |
| extern int netpoll_trap(void); |
| #endif |
| extern int skb_gro_receive(struct sk_buff **head, |
| struct sk_buff *skb); |
| extern void skb_gro_reset_offset(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) |
| { |
| NAPI_GRO_CB(skb)->frag0 = NULL; |
| NAPI_GRO_CB(skb)->frag0_len = 0; |
| return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL; |
| } |
| |
| 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 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); |
| extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); |
| static inline int unregister_gifconf(unsigned int family) |
| { |
| return register_gifconf(family, NULL); |
| } |
| |
| /* |
| * 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; |
| |
| #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; |
| #endif |
| struct sk_buff_head input_pkt_queue; |
| struct napi_struct backlog; |
| }; |
| |
| static inline void input_queue_head_add(struct softnet_data *sd, |
| unsigned int len) |
| { |
| #ifdef CONFIG_RPS |
| sd->input_queue_head += len; |
| #endif |
| } |
| |
| DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
| |
| #define HAVE_NETIF_QUEUE |
| |
| extern void __netif_schedule(struct Qdisc *q); |
| |
| static inline void netif_schedule_queue(struct netdev_queue *txq) |
| { |
| if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) |
| __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_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_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) |
| { |
| set_bit(__QUEUE_STATE_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 int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
| { |
| return test_bit(__QUEUE_STATE_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 int netif_queue_stopped(const struct net_device *dev) |
| { |
| return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
| } |
| |
| static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue) |
| { |
| return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state); |
| } |
| |
| /** |
| * netif_running - test if up |
| * @dev: network device |
| * |
| * Test if the device has been brought up. |
| */ |
| static inline int 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 int __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 int 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_XOFF, &txq->state)) |
| __netif_schedule(txq->qdisc); |
| } |
| |
| /** |
| * netif_is_multiqueue - test if device has multiple transmit queues |
| * @dev: network device |
| * |
| * Check if device has multiple transmit queues |
| */ |
| static inline int netif_is_multiqueue(const struct net_device *dev) |
| { |
| return (dev->num_tx_queues > 1); |
| } |
| |
| /* Use this variant when it is known for sure that it |
| * is executing from hardware interrupt context or with hardware interrupts |
| * disabled. |
| */ |
| extern 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. |
| */ |
| extern void dev_kfree_skb_any(struct sk_buff *skb); |
| |
| #define HAVE_NETIF_RX 1 |
| extern int netif_rx(struct sk_buff *skb); |
| extern int netif_rx_ni(struct sk_buff *skb); |
| #define HAVE_NETIF_RECEIVE_SKB 1 |
| extern int netif_receive_skb(struct sk_buff *skb); |
| extern gro_result_t dev_gro_receive(struct napi_struct *napi, |
| struct sk_buff *skb); |
| extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); |
| extern gro_result_t napi_gro_receive(struct napi_struct *napi, |
| struct sk_buff *skb); |
| extern void napi_reuse_skb(struct napi_struct *napi, |
| struct sk_buff *skb); |
| extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
| extern gro_result_t napi_frags_finish(struct napi_struct *napi, |
| struct sk_buff *skb, |
| gro_result_t ret); |
| extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); |
| extern 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; |
| } |
| |
| extern void netif_nit_deliver(struct sk_buff *skb); |
| extern int dev_valid_name(const char *name); |
| extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
| extern int dev_ethtool(struct net *net, struct ifreq *); |
| extern unsigned dev_get_flags(const struct net_device *); |
| extern int __dev_change_flags(struct net_device *, unsigned int flags); |
| extern int dev_change_flags(struct net_device *, unsigned); |
| extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
| extern int dev_change_name(struct net_device *, const char *); |
| extern int dev_set_alias(struct net_device *, const char *, size_t); |
| extern int dev_change_net_namespace(struct net_device *, |
| struct net *, const char *); |
| extern int dev_set_mtu(struct net_device *, int); |
| extern int dev_set_mac_address(struct net_device *, |
| struct sockaddr *); |
| extern int dev_hard_start_xmit(struct sk_buff *skb, |
| struct net_device *dev, |
| struct netdev_queue *txq); |
| extern int dev_forward_skb(struct net_device *dev, |
| struct sk_buff *skb); |
| |
| extern int netdev_budget; |
| |
| /* Called by rtnetlink.c:rtnl_unlock() */ |
| extern 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) |
| { |
| atomic_dec(&dev->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) |
| { |
| atomic_inc(&dev->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. |
| */ |
| |
| extern void linkwatch_fire_event(struct net_device *dev); |
| extern 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 int netif_carrier_ok(const struct net_device *dev) |
| { |
| return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
| } |
| |
| extern unsigned long dev_trans_start(struct net_device *dev); |
| |
| extern void __netdev_watchdog_up(struct net_device *dev); |
| |
| extern void netif_carrier_on(struct net_device *dev); |
| |
| extern 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 int 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 int 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 int netif_device_present(struct net_device *dev) |
| { |
| return test_bit(__LINK_STATE_PRESENT, &dev->state); |
| } |
| |
| extern void netif_device_detach(struct net_device *dev); |
| |
| extern void netif_device_attach(struct net_device *dev); |
| |
| /* |
| * Network interface message level settings |
| */ |
| #define HAVE_NETIF_MSG 1 |
| |
| 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 int __netif_tx_trylock(struct netdev_queue *txq) |
| { |
| int 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_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) */ |
| |
| extern void ether_setup(struct net_device *dev); |
| |
| /* Support for loadable net-drivers */ |
| extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name, |
| void (*setup)(struct net_device *), |
| unsigned int queue_count); |
| #define alloc_netdev(sizeof_priv, name, setup) \ |
| alloc_netdev_mq(sizeof_priv, name, setup, 1) |
| extern int register_netdev(struct net_device *dev); |
| extern void unregister_netdev(struct net_device *dev); |
| |
| /* General hardware address lists handling functions */ |
| extern 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); |
| extern 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); |
| extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
| struct netdev_hw_addr_list *from_list, |
| int addr_len); |
| extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
| struct netdev_hw_addr_list *from_list, |
| int addr_len); |
| extern void __hw_addr_flush(struct netdev_hw_addr_list *list); |
| extern void __hw_addr_init(struct netdev_hw_addr_list *list); |
| |
| /* Functions used for device addresses handling */ |
| extern int dev_addr_add(struct net_device *dev, unsigned char *addr, |
| unsigned char addr_type); |
| extern int dev_addr_del(struct net_device *dev, unsigned char *addr, |
| unsigned char addr_type); |
| extern int dev_addr_add_multiple(struct net_device *to_dev, |
| struct net_device *from_dev, |
| unsigned char addr_type); |
| extern int dev_addr_del_multiple(struct net_device *to_dev, |
| struct net_device *from_dev, |
| unsigned char addr_type); |
| extern void dev_addr_flush(struct net_device *dev); |
| extern int dev_addr_init(struct net_device *dev); |
| |
| /* Functions used for unicast addresses handling */ |
| extern int dev_uc_add(struct net_device *dev, unsigned char *addr); |
| extern int dev_uc_del(struct net_device *dev, unsigned char *addr); |
| extern int dev_uc_sync(struct net_device *to, struct net_device *from); |
| extern void dev_uc_unsync(struct net_device *to, struct net_device *from); |
| extern void dev_uc_flush(struct net_device *dev); |
| extern void dev_uc_init(struct net_device *dev); |
| |
| /* Functions used for multicast addresses handling */ |
| extern int dev_mc_add(struct net_device *dev, unsigned char *addr); |
| extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); |
| extern int dev_mc_del(struct net_device *dev, unsigned char *addr); |
| extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); |
| extern int dev_mc_sync(struct net_device *to, struct net_device *from); |
| extern void dev_mc_unsync(struct net_device *to, struct net_device *from); |
| extern void dev_mc_flush(struct net_device *dev); |
| extern void dev_mc_init(struct net_device *dev); |
| |
| /* Functions used for secondary unicast and multicast support */ |
| extern void dev_set_rx_mode(struct net_device *dev); |
| extern void __dev_set_rx_mode(struct net_device *dev); |
| extern int dev_set_promiscuity(struct net_device *dev, int inc); |
| extern int dev_set_allmulti(struct net_device *dev, int inc); |
| extern void netdev_state_change(struct net_device *dev); |
| extern int netdev_bonding_change(struct net_device *dev, |
| unsigned long event); |
| extern void netdev_features_change(struct net_device *dev); |
| /* Load a device via the kmod */ |
| extern void dev_load(struct net *net, const char *name); |
| extern void dev_mcast_init(void); |
| extern const struct net_device_stats *dev_get_stats(struct net_device *dev); |
| extern void dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats); |
| |
| extern int netdev_max_backlog; |
| extern int weight_p; |
| extern int netdev_set_master(struct net_device *dev, struct net_device *master); |
| extern int skb_checksum_help(struct sk_buff *skb); |
| extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features); |
| #ifdef CONFIG_BUG |
| extern 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 */ |
| extern void net_enable_timestamp(void); |
| extern void net_disable_timestamp(void); |
| |
| #ifdef CONFIG_PROC_FS |
| extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); |
| extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); |
| extern void dev_seq_stop(struct seq_file *seq, void *v); |
| #endif |
| |
| extern int netdev_class_create_file(struct class_attribute *class_attr); |
| extern void netdev_class_remove_file(struct class_attribute *class_attr); |
| |
| extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len); |
| |
| extern void linkwatch_run_queue(void); |
| |
| unsigned long netdev_increment_features(unsigned long all, unsigned long one, |
| unsigned long mask); |
| unsigned long netdev_fix_features(unsigned long features, const char *name); |
| |
| void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
| struct net_device *dev); |
| |
| static inline int net_gso_ok(int features, int gso_type) |
| { |
| int feature = gso_type << NETIF_F_GSO_SHIFT; |
| return (features & feature) == feature; |
| } |
| |
| static inline int skb_gso_ok(struct sk_buff *skb, int features) |
| { |
| return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
| (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST)); |
| } |
| |
| static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb) |
| { |
| return skb_is_gso(skb) && |
| (!skb_gso_ok(skb, dev->features) || |
| unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); |
| } |
| |
| static inline void netif_set_gso_max_size(struct net_device *dev, |
| unsigned int size) |
| { |
| dev->gso_max_size = size; |
| } |
| |
| extern int __skb_bond_should_drop(struct sk_buff *skb, |
| struct net_device *master); |
| |
| static inline int skb_bond_should_drop(struct sk_buff *skb, |
| struct net_device *master) |
| { |
| if (master) |
| return __skb_bond_should_drop(skb, master); |
| return 0; |
| } |
| |
| extern struct pernet_operations __net_initdata loopback_net_ops; |
| |
| static inline int dev_ethtool_get_settings(struct net_device *dev, |
| struct ethtool_cmd *cmd) |
| { |
| if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings) |
| return -EOPNOTSUPP; |
| return dev->ethtool_ops->get_settings(dev, cmd); |
| } |
| |
| static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev) |
| { |
| if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum) |
| return 0; |
| return dev->ethtool_ops->get_rx_csum(dev); |
| } |
| |
| static inline u32 dev_ethtool_get_flags(struct net_device *dev) |
| { |
| if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags) |
| return 0; |
| return dev->ethtool_ops->get_flags(dev); |
| } |
| |
| /* 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; |
| } |
| |
| #define netdev_printk(level, netdev, format, args...) \ |
| dev_printk(level, (netdev)->dev.parent, \ |
| "%s: " format, \ |
| netdev_name(netdev), ##args) |
| |
| #define netdev_emerg(dev, format, args...) \ |
| netdev_printk(KERN_EMERG, dev, format, ##args) |
| #define netdev_alert(dev, format, args...) \ |
| netdev_printk(KERN_ALERT, dev, format, ##args) |
| #define netdev_crit(dev, format, args...) \ |
| netdev_printk(KERN_CRIT, dev, format, ##args) |
| #define netdev_err(dev, format, args...) \ |
| netdev_printk(KERN_ERR, dev, format, ##args) |
| #define netdev_warn(dev, format, args...) \ |
| netdev_printk(KERN_WARNING, dev, format, ##args) |
| #define netdev_notice(dev, format, args...) \ |
| netdev_printk(KERN_NOTICE, dev, format, ##args) |
| #define netdev_info(dev, format, args...) \ |
| netdev_printk(KERN_INFO, dev, format, ##args) |
| |
| #if defined(DEBUG) |
| #define netdev_dbg(__dev, format, args...) \ |
| netdev_printk(KERN_DEBUG, __dev, format, ##args) |
| #elif defined(CONFIG_DYNAMIC_DEBUG) |
| #define netdev_dbg(__dev, format, args...) \ |
| do { \ |
| dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \ |
| netdev_name(__dev), ##args); \ |
| } while (0) |
| #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_emerg(priv, type, dev, fmt, args...) \ |
| netif_printk(priv, type, KERN_EMERG, dev, fmt, ##args) |
| #define netif_alert(priv, type, dev, fmt, args...) \ |
| netif_printk(priv, type, KERN_ALERT, dev, fmt, ##args) |
| #define netif_crit(priv, type, dev, fmt, args...) \ |
| netif_printk(priv, type, KERN_CRIT, dev, fmt, ##args) |
| #define netif_err(priv, type, dev, fmt, args...) \ |
| netif_printk(priv, type, KERN_ERR, dev, fmt, ##args) |
| #define netif_warn(priv, type, dev, fmt, args...) \ |
| netif_printk(priv, type, KERN_WARNING, dev, fmt, ##args) |
| #define netif_notice(priv, type, dev, fmt, args...) \ |
| netif_printk(priv, type, KERN_NOTICE, dev, fmt, ##args) |
| #define netif_info(priv, type, dev, fmt, args...) \ |
| netif_printk(priv, type, KERN_INFO, (dev), fmt, ##args) |
| |
| #if defined(DEBUG) |
| #define netif_dbg(priv, type, dev, format, args...) \ |
| netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) |
| #elif defined(CONFIG_DYNAMIC_DEBUG) |
| #define netif_dbg(priv, type, netdev, format, args...) \ |
| do { \ |
| if (netif_msg_##type(priv)) \ |
| dynamic_dev_dbg((netdev)->dev.parent, \ |
| "%s: " format, \ |
| netdev_name(netdev), ##args); \ |
| } while (0) |
| #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 netdev_dbg |
| #else |
| #define netif_vdbg(priv, type, dev, format, args...) \ |
| ({ \ |
| if (0) \ |
| netif_printk(KERN_DEBUG, dev, format, ##args); \ |
| 0; \ |
| }) |
| #endif |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _LINUX_NETDEVICE_H */ |