NAME¶

build_skb - build a network buffer

SYNOPSIS¶

struct sk_buff * build_skb(void * data);

ARGUMENTS¶

data

DESCRIPTION¶

Allocate a new sk_buff. Caller provides space holding head and skb_shared_info. data must have been allocated by kmalloc The return is the new skb buffer. On a failure the return is NULL, and data is not freed.

NOTES¶

Before IO, driver allocates only data buffer where NIC put incoming frame Driver should add room at head (NET_SKB_PAD) and MUST add room at tail (SKB_DATA_ALIGN(skb_shared_info)) After IO, driver calls build_skb, to allocate sk_buff and populate it before giving packet to stack. RX rings only contains data buffers, not full skbs.

COPYRIGHT¶