include/linux/etherdevice.h

File Facts

System

Linux kernel

Corpus path

include/linux/etherdevice.h

Extension

.h

Size

19874 bytes

Lines

661

Domain

Core OS

Bucket

Core Kernel Interface

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/if_ether.h
• linux/netdevice.h
• linux/random.h
• linux/crc32.h
• linux/unaligned.h
• asm/bitsperlong.h

Detected Declarations

• struct device
• struct fwnode_handle
• function is_link_local_ether_addr
• function is_zero_ether_addr
• function is_multicast_ether_addr
• function is_multicast_ether_addr_64bits
• function is_local_ether_addr
• function is_broadcast_ether_addr
• function is_unicast_ether_addr
• function address
• function eth_proto_is_802_3
• function address
• function eth_broadcast_addr
• function eth_zero_addr
• function address
• function eth_hw_addr_crc
• function ether_addr_copy
• function eth_hw_addr_set
• function attributes
• function ether_addr_equal
• function ether_addr_equal_64bits
• function ether_addr_equal_unaligned
• function ether_addr_equal_masked
• function ether_addr_is_ipv4_mcast
• function ether_addr_is_ipv6_mcast
• function ether_addr_is_ip_mcast
• function ether_addr_to_u64
• function u64_to_ether_addr
• function eth_addr_dec
• function eth_addr_inc
• function eth_addr_add
• function ether_addr_equal_64bits
• function header
• function eth_hw_addr_gen
• function eth_skb_pkt_type
• function eth_skb_pad

Annotated Snippet

if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
			if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
				skb->pkt_type = PACKET_BROADCAST;
			else
				skb->pkt_type = PACKET_MULTICAST;
		} else {
			skb->pkt_type = PACKET_OTHERHOST;
		}
	}
}

static inline struct ethhdr *eth_skb_pull_mac(struct sk_buff *skb)
{
	struct ethhdr *eth = (struct ethhdr *)skb->data;

	skb_pull_inline(skb, ETH_HLEN);
	return eth;
}

/**
 * eth_skb_pad - Pad buffer to minimum number of octets for Ethernet frame
 * @skb: Buffer to pad
 *
 * An Ethernet frame should have a minimum size of 60 bytes.  This function
 * takes short frames and pads them with zeros up to the 60 byte limit.
 */
static inline int eth_skb_pad(struct sk_buff *skb)
{
	return skb_put_padto(skb, ETH_ZLEN);
}

#endif	/* _LINUX_ETHERDEVICE_H */

Annotation

• Immediate include surface: `linux/if_ether.h`, `linux/netdevice.h`, `linux/random.h`, `linux/crc32.h`, `linux/unaligned.h`, `asm/bitsperlong.h`.
• Detected declarations: `struct device`, `struct fwnode_handle`, `function is_link_local_ether_addr`, `function is_zero_ether_addr`, `function is_multicast_ether_addr`, `function is_multicast_ether_addr_64bits`, `function is_local_ether_addr`, `function is_broadcast_ether_addr`, `function is_unicast_ether_addr`, `function address`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.