table of contents
| SKB_COPY_EXPAND(9) | Linux Networking | SKB_COPY_EXPAND(9) |
NAME¶
skb_copy_expand - copy and expand sk_buff
SYNOPSIS¶
struct sk_buff * skb_copy_expand(const struct sk_buff * skb, int newheadroom, int newtailroom, gfp_t gfp_mask);
ARGUMENTS¶
skb
buffer to copy
newheadroom
new free bytes at head
newtailroom
new free bytes at tail
gfp_mask
allocation priority
DESCRIPTION¶
Make a copy of both an sk_buff and its data and while doing so allocate additional space.
This is used when the caller wishes to modify the data and needs a private copy of the data to alter as well as more space for new fields. Returns NULL on failure or the pointer to the buffer on success. The returned buffer has a reference count of 1.
You must pass GFP_ATOMIC as the allocation priority if this function is called from an interrupt.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |