| pskb_expand_head(9) - phpMan
PSKB_EXPAND_HEAD(9) Linux Networking PSKB_EXPAND_HEAD(9)
NAME
pskb_expand_head - reallocate header of sk_buff
SYNOPSIS
int pskb_expand_head(struct sk_buff * skb, int nhead, int ntail, gfp_t gfp_mask);
ARGUMENTS
skb
buffer to reallocate
nhead
room to add at head
ntail
room to add at tail
gfp_mask
allocation priority
DESCRIPTION
Expands (or creates identical copy, if nhead and ntail are zero) header of skb. sk_buff
itself is not changed. sk_buff MUST have reference count of 1. Returns zero in the case
of success or error, if expansion failed. In the last case, sk_buff is not changed.
All the pointers pointing into skb header may change and must be reloaded after call to
this function.
COPYRIGHT
Kernel Hackers Manual 4.8. January 2017 PSKB_EXPAND_HEAD(9)
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