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STRUCT NET_DEVICE(9) | Network device support | STRUCT NET_DEVICE(9) |
NAME¶
struct_net_device - The DEVICE structure. Actually, this whole structure is a big mistake. It mixes I/O data with strictly “high-level” data, and it has to know about almost every data structure used in the INET module.SYNOPSIS¶
struct net_device { char name[IFNAMSIZ]; struct hlist_node name_hlist; char * ifalias; unsigned long mem_end; unsigned long mem_start; unsigned long base_addr; int irq; atomic_t carrier_changes; unsigned long state; struct list_head dev_list; struct list_head napi_list; struct list_head unreg_list; struct list_head close_list; struct list_head ptype_all; struct list_head ptype_specific; struct {unnamed_struct}; struct garp_port __rcu * garp_port; struct mrp_port __rcu * mrp_port; struct device dev; const struct attribute_group * sysfs_groups[4]; const struct attribute_group * sysfs_rx_queue_group; const struct rtnl_link_ops * rtnl_link_ops; #define GSO_MAX_SIZE 65536 unsigned int gso_max_size; #define GSO_MAX_SEGS 65535 u16 gso_max_segs; #ifdef CONFIG_DCB const struct dcbnl_rtnl_ops * dcbnl_ops; #endif u8 num_tc; struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; u8 prio_tc_map[TC_BITMASK + 1]; #if IS_ENABLED(CONFIG_FCOE) unsigned int fcoe_ddp_xid; #endif #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) struct netprio_map __rcu * priomap; #endif struct phy_device * phydev; struct lock_class_key * qdisc_tx_busylock; struct lock_class_key * qdisc_running_key; bool proto_down; };
MEMBERS¶
name[IFNAMSIZ]This is the first field of the “visible”
part of this structure (i.e. as seen by users in the “Space.c”
file). It is the name of the interface.
name_hlist
Device name hash chain, please keep it close to
name[]
ifalias
SNMP alias
mem_end
Shared memory end
mem_start
Shared memory start
base_addr
Device I/O address
irq
Device IRQ number
carrier_changes
Stats to monitor carrier on<->off transitions
state
Generic network queuing layer state, see
netdev_state_t
dev_list
The global list of network devices
napi_list
List entry used for polling NAPI devices
unreg_list
List entry when we are unregistering the device; see the
function unregister_netdev
close_list
List entry used when we are closing the device
ptype_all
Device-specific packet handlers for all protocols
ptype_specific
Device-specific, protocol-specific packet handlers
{unnamed_struct}
anonymous
garp_port
GARP
mrp_port
MRP
dev
Class/net/name entry
sysfs_groups[4]
Space for optional device, statistics and wireless sysfs
groups
sysfs_rx_queue_group
Space for optional per-rx queue attributes
rtnl_link_ops
Rtnl_link_ops
gso_max_size
Maximum size of generic segmentation offload
gso_max_segs
Maximum number of segments that can be passed to the NIC
for GSO
dcbnl_ops
Data Center Bridging netlink ops
num_tc
Number of traffic classes in the net device
tc_to_txq[TC_MAX_QUEUE]
XXX: need comments on this one
prio_tc_map[TC_BITMASK + 1]
XXX: need comments on this one
fcoe_ddp_xid
Max exchange id for FCoE LRO by ddp
priomap
XXX: need comments on this one
phydev
Physical device may attach itself for hardware
timestamping
qdisc_tx_busylock
lockdep class annotating Qdisc->busylock
spinlock
qdisc_running_key
lockdep class annotating Qdisc->running seqcount
proto_down
protocol port state information can be sent to the switch
driver and used to set the phys state of the switch port.
DESCRIPTION¶
interface address info:FIXME: cleanup struct net_device such that network protocol info moves out.
COPYRIGHT¶
April 2019 | Kernel Hackers Manual 4.9. |