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Commit 374c55d4 authored by Sven Eckelmann's avatar Sven Eckelmann Committed by Greg Kroah-Hartman
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batman-adv: Consider fragmentation for needed_headroom



commit 4ca23e2c upstream.

If a batman-adv packets has to be fragmented, then the original batman-adv
packet header is not stripped away. Instead, only a new header is added in
front of the packet after it was split.

This size must be considered to avoid cost intensive reallocations during
the transmission through the various device layers.

Fixes: 7bca68c7 ("batman-adv: Add lower layer needed_(head|tail)room to own ones")
Reported-by: default avatarLinus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: default avatarSven Eckelmann <sven@narfation.org>
Signed-off-by: default avatarSimon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: default avatarSven Eckelmann <sven@narfation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9eff9854
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