Allocate a network buffer
struct sk_buff * __alloc_skb(unsigned int size, gfp_t gfp_mask, int flags, int node);
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
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.