net: create skb_gso_validate_mac_len()

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If you take a GSO skb, and split it into packets, will the MAC
length (L2 + L3 + L4 headers + payload) of those packets be small
enough to fit within a given length?

Move skb_gso_mac_seglen() to skbuff.h with other related functions
like skb_gso_network_seglen() so we can use it, and then create
skb_gso_validate_mac_len to do the full calculation.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Daniel Axtens 2018-01-31 14:15:33 +11:00 • committed by David S. Miller

parent 255442c938

commit 2b16f04872

3 changed files with 66 additions and 23 deletions

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16

include/linux/skbuff.h

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73

net/core/skbuff.c

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10

net/sched/sch_tbf.c

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