__alloc_skb
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Name

__alloc_skb — allocate a network buffer

Synopsis

struct sk_buff * __alloc_skb (unsigned int size,
 gfp_t gfp_mask,
 int flags,
 int node);
 

Arguments

size

size to allocate

gfp_mask

allocation mask

flags

If SKB_ALLOC_FCLONE is set, allocate from fclone cache instead of head cache and allocate a cloned (child) skb. If SKB_ALLOC_RX is set, __GFP_MEMALLOC will be used for allocations in case the data is required for writeback

node

numa node to allocate memory on

Description

Allocate a new sk_buff. The returned buffer has no headroom and a tail room of at least size bytes. The object has a reference count of one. The return is the buffer. On a failure the return is NULL.

Buffers may only be allocated from interrupts using a gfp_mask of GFP_ATOMIC.

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