xsk: move xdp_buff's data length check to xsk_rcv_check

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If the data in xdp_buff exceeds the xsk frame length, the packet needs
to be dropped. This check is currently being done in __xsk_rcv(). Move
the described logic to xsk_rcv_check() so that such a xdp_buff will
only be dropped if the application does not support multi-buffer
(absence of XDP_USE_SG bind flag). This is applicable for all cases:
copy mode, zero copy mode as well as skb mode.

Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com>
Link: https://lore.kernel.org/r/20230719132421.584801-5-maciej.fijalkowski@intel.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Tirthendu Sarkar 2023-07-19 15:24:01 +02:00 • committed by Alexei Starovoitov

parent 556444c4e6

commit faa91b839b

1 changed files with 13 additions and 14 deletions

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net/xdp/xsk.c

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