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Diffstat (limited to 'libdde-linux26/contrib/include/linux/netdevice.h')
| -rw-r--r-- | libdde-linux26/contrib/include/linux/netdevice.h | 1899 |
1 files changed, 1899 insertions, 0 deletions
diff --git a/libdde-linux26/contrib/include/linux/netdevice.h b/libdde-linux26/contrib/include/linux/netdevice.h new file mode 100644 index 00000000..65936673 --- /dev/null +++ b/libdde-linux26/contrib/include/linux/netdevice.h @@ -0,0 +1,1899 @@ +/* + * 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> + +#ifdef __KERNEL__ +#include <linux/timer.h> +#include <linux/delay.h> +#include <asm/atomic.h> +#include <asm/cache.h> +#include <asm/byteorder.h> + +#include <linux/device.h> +#include <linux/percpu.h> +#include <linux/dmaengine.h> +#include <linux/workqueue.h> + +#include <net/net_namespace.h> +#include <net/dsa.h> +#ifdef CONFIG_DCB +#include <net/dcbnl.h> +#endif + +struct vlan_group; +struct ethtool_ops; +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() */ + +#define NET_XMIT_SUCCESS 0 +#define NET_XMIT_DROP 1 /* skb dropped */ +#define NET_XMIT_CN 2 /* congestion notification */ +#define NET_XMIT_POLICED 3 /* skb is shot by police */ +#define NET_XMIT_MASK 0xFFFF /* qdisc flags in net/sch_generic.h */ + +/* Backlog congestion levels */ +#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ +#define NET_RX_DROP 1 /* packet dropped */ +#define NET_RX_CN_LOW 2 /* storm alert, just in case */ +#define NET_RX_CN_MOD 3 /* Storm on its way! */ +#define NET_RX_CN_HIGH 4 /* The storm is here */ +#define NET_RX_BAD 5 /* packet dropped due to kernel error */ + +/* 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) + +#endif + +#define MAX_ADDR_LEN 32 /* Largest hardware address length */ + +/* Driver transmit return codes */ +#define NETDEV_TX_OK 0 /* driver took care of packet */ +#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/ +#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */ + +#ifdef __KERNEL__ + +/* + * Compute the worst case header length according to the protocols + * used. + */ + +#if defined(CONFIG_WLAN_80211) || 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) +# 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; +}; + +DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat); + +struct dev_addr_list +{ + struct dev_addr_list *next; + u8 da_addr[MAX_ADDR_LEN]; + u8 da_addrlen; + u8 da_synced; + int da_users; + int da_gusers; +}; + +/* + * We tag multicasts with these structures. + */ + +#define dev_mc_list dev_addr_list +#define dmi_addr da_addr +#define dmi_addrlen da_addrlen +#define dmi_users da_users +#define dmi_gusers da_gusers + +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 + 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 */ +}; + +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 { + struct net_device *dev; + struct Qdisc *qdisc; + unsigned long state; + spinlock_t _xmit_lock; + int xmit_lock_owner; + struct Qdisc *qdisc_sleeping; +} ____cacheline_aligned_in_smp; + + +/* + * 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. + * + * int (*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, or NETDEV_TX_LOCKED, + * 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 not 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* (*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); + */ +#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); + int (*ndo_start_xmit) (struct sk_buff *skb, + struct net_device *dev); + u16 (*ndo_select_queue)(struct net_device *dev, + struct sk_buff *skb); +#define HAVE_CHANGE_RX_FLAGS + void (*ndo_change_rx_flags)(struct net_device *dev, + int flags); +#define HAVE_SET_RX_MODE + void (*ndo_set_rx_mode)(struct net_device *dev); +#define HAVE_MULTICAST + void (*ndo_set_multicast_list)(struct net_device *dev); +#define HAVE_SET_MAC_ADDR + int (*ndo_set_mac_address)(struct net_device *dev, + void *addr); +#define HAVE_VALIDATE_ADDR + int (*ndo_validate_addr)(struct net_device *dev); +#define HAVE_PRIVATE_IOCTL + int (*ndo_do_ioctl)(struct net_device *dev, + struct ifreq *ifr, int cmd); +#define HAVE_SET_CONFIG + int (*ndo_set_config)(struct net_device *dev, + struct ifmap *map); +#define HAVE_CHANGE_MTU + int (*ndo_change_mtu)(struct net_device *dev, + int new_mtu); + int (*ndo_neigh_setup)(struct net_device *dev, + struct neigh_parms *); +#define HAVE_TX_TIMEOUT + 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 +#define HAVE_NETDEV_POLL + void (*ndo_poll_controller)(struct net_device *dev); +#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; + + /* 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 */ + + /* Segmentation offload features */ +#define NETIF_F_GSO_SHIFT 16 +#define NETIF_F_GSO_MASK 0xffff0000 +#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) + + /* 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 dev_addr_list *uc_list; /* Secondary unicast mac addresses */ + int uc_count; /* Number of installed ucasts */ + int uc_promisc; + struct dev_addr_list *mc_list; /* Multicast mac addresses */ + int mc_count; /* Number of installed mcasts */ + 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[MAX_ADDR_LEN]; /* hw address, (before bcast + because most packets are unicast) */ + + unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ + + 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; + + 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. */ + 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 net_device *link_watch_next; + + /* 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; + + /* 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 statistics and wireless sysfs groups */ + struct attribute_group *sysfs_groups[3]; + + /* 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 */ + struct dcbnl_rtnl_ops *dcbnl_ops; +#endif + +#ifdef CONFIG_COMPAT_NET_DEV_OPS + struct { + int (*init)(struct net_device *dev); + void (*uninit)(struct net_device *dev); + int (*open)(struct net_device *dev); + int (*stop)(struct net_device *dev); + int (*hard_start_xmit) (struct sk_buff *skb, + struct net_device *dev); + u16 (*select_queue)(struct net_device *dev, + struct sk_buff *skb); + void (*change_rx_flags)(struct net_device *dev, + int flags); + void (*set_rx_mode)(struct net_device *dev); + void (*set_multicast_list)(struct net_device *dev); + int (*set_mac_address)(struct net_device *dev, + void *addr); + int (*validate_addr)(struct net_device *dev); + int (*do_ioctl)(struct net_device *dev, + struct ifreq *ifr, int cmd); + int (*set_config)(struct net_device *dev, + struct ifmap *map); + int (*change_mtu)(struct net_device *dev, int new_mtu); + int (*neigh_setup)(struct net_device *dev, + struct neigh_parms *); + void (*tx_timeout) (struct net_device *dev); + struct net_device_stats* (*get_stats)(struct net_device *dev); + void (*vlan_rx_register)(struct net_device *dev, + struct vlan_group *grp); + void (*vlan_rx_add_vid)(struct net_device *dev, + unsigned short vid); + void (*vlan_rx_kill_vid)(struct net_device *dev, + unsigned short vid); +#ifdef CONFIG_NET_POLL_CONTROLLER + void (*poll_controller)(struct net_device *dev); +#endif + }; +#endif +}; +#define to_net_dev(d) container_of(d, struct net_device, dev) + +#define NETDEV_ALIGN 32 +#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1) + +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; +} + +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 + ((sizeof(struct net_device) + + NETDEV_ALIGN_CONST) + & ~NETDEV_ALIGN_CONST); +} + +/* 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)) + +/** + * 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 { + /* 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; +}; + +struct napi_gro_fraginfo { + skb_frag_t frags[MAX_SKB_FRAGS]; + unsigned int nr_frags; + unsigned int ip_summed; + unsigned int len; + __wsum csum; +}; + +#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_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 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 *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(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(struct net_device *dev); +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 int dev_restart(struct net_device *dev); +#ifdef CONFIG_NETPOLL_TRAP +extern int netpoll_trap(void); +#endif + +static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, + const void *daddr, const void *saddr, + unsigned 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 so that + * no locking is needed. + */ +struct softnet_data +{ + struct Qdisc *output_queue; + struct sk_buff_head input_pkt_queue; + struct list_head poll_list; + struct sk_buff *completion_queue; + + struct napi_struct backlog; +}; + +DECLARE_PER_CPU(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()) { + clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); + 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); + clear_bit(__QUEUE_STATE_XOFF, &txq->state); +} + +/** + * 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 + set_bit(__QUEUE_STATE_XOFF, &txq->state); +} + +/** + * 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 test_bit(__QUEUE_STATE_XOFF, &txq->state); +} + +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 void napi_gro_flush(struct napi_struct *napi); +extern int dev_gro_receive(struct napi_struct *napi, + struct sk_buff *skb); +extern int 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_fraginfo_skb(struct napi_struct *napi, + struct napi_gro_fraginfo *info); +extern int napi_gro_frags(struct napi_struct *napi, + struct napi_gro_fraginfo *info); +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); +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 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); + +/** + * 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 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; +} + +/* Test if receive needs to be scheduled but only if up */ +static inline int netif_rx_schedule_prep(struct napi_struct *napi) +{ + return napi_schedule_prep(napi); +} + +/* Add interface to tail of rx poll list. This assumes that _prep has + * already been called and returned 1. + */ +static inline void __netif_rx_schedule(struct napi_struct *napi) +{ + __napi_schedule(napi); +} + +/* Try to reschedule poll. Called by irq handler. */ + +static inline void netif_rx_schedule(struct napi_struct *napi) +{ + if (netif_rx_schedule_prep(napi)) + __netif_rx_schedule(napi); +} + +/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */ +static inline int netif_rx_reschedule(struct napi_struct *napi) +{ + if (napi_schedule_prep(napi)) { + __netif_rx_schedule(napi); + return 1; + } + return 0; +} + +/* same as netif_rx_complete, except that local_irq_save(flags) + * has already been issued + */ +static inline void __netif_rx_complete(struct napi_struct *napi) +{ + __napi_complete(napi); +} + +/* Remove interface from poll list: it must be in the poll list + * on current cpu. This primitive is called by dev->poll(), when + * it completes the work. The device cannot be out of poll list at this + * moment, it is BUG(). + */ +static inline void netif_rx_complete(struct napi_struct *napi) +{ + napi_complete(napi); +} + +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); +} + +/** + * 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); + if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) + __netif_schedule(txq->qdisc); + } + 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); +} + +/* 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); +/* 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_unicast_delete(struct net_device *dev, void *addr, int alen); +extern int dev_unicast_add(struct net_device *dev, void *addr, int alen); +extern int dev_unicast_sync(struct net_device *to, struct net_device *from); +extern void dev_unicast_unsync(struct net_device *to, struct net_device *from); +extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all); +extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly); +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 int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all); +extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly); +extern int __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); +extern void __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count); +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 void netdev_bonding_change(struct net_device *dev); +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 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); + +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); +} + +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) || + (skb_shinfo(skb)->frag_list && + !(dev->features & NETIF_F_FRAGLIST)) || + 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; +} + +/* On bonding slaves other than the currently active slave, suppress + * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and + * ARP on active-backup slaves with arp_validate enabled. + */ +static inline int skb_bond_should_drop(struct sk_buff *skb) +{ + struct net_device *dev = skb->dev; + struct net_device *master = dev->master; + + if (master) { + if (master->priv_flags & IFF_MASTER_ARPMON) + dev->last_rx = jiffies; + + if (dev->priv_flags & IFF_SLAVE_INACTIVE) { + if ((dev->priv_flags & IFF_SLAVE_NEEDARP) && + skb->protocol == __constant_htons(ETH_P_ARP)) + return 0; + + if (master->priv_flags & IFF_MASTER_ALB) { + if (skb->pkt_type != PACKET_BROADCAST && + skb->pkt_type != PACKET_MULTICAST) + return 0; + } + if (master->priv_flags & IFF_MASTER_8023AD && + skb->protocol == __constant_htons(ETH_P_SLOW)) + return 0; + + return 1; + } + } + return 0; +} + +extern struct pernet_operations __net_initdata loopback_net_ops; +#endif /* __KERNEL__ */ + +#endif /* _LINUX_DEV_H */ |