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The UMEM state refactor made __send_pkts() use xsk->umem for Tx address generation. At the same time, the shared-UMEM Tx setup copies the Rx UMEM state into a Tx-local state object and resets base_addr and next_buffer before configuring the Tx socket. Passing that Tx-local object to xsk_configure() makes xsk->umem point to the zero-based Tx allocator state. This breaks the BIDIRECTIONAL test once the roles are switched: the same socket is then used for Rx validation, but received descriptors from the other logical UMEM half are checked against base_addr == 0. With the new UMEM bounds check, a valid address such as base_addr + XDP_PACKET_HEADROOM is rejected as being outside the UMEM window. Keep xsk->umem as the shared/Rx UMEM view used for socket configuration and Rx validation. Use the ifobject-local UMEM copy only for Tx descriptor address generation, preserving the BIDIRECTIONAL test's intent of using the proper logical UMEM half after the direction switch. Reviewed-by: Jason Xing <kerneljasonxing@gmail.com> Reviewed-by: Tushar Vyavahare <tushar.vyavahare@intel.com> Tested-by: Tushar Vyavahare <tushar.vyavahare@intel.com> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Link: https://patch.msgid.link/20260629191221.2700-1-maciej.fijalkowski@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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