diff options
| author | Stanislav Fomichev <sdf@fomichev.me> | 2024-07-13 03:52:51 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2024-07-25 11:57:27 +0200 |
| commit | d5e726d9143c5624135f5dc9e4069799adeef734 (patch) | |
| tree | d24f61de8cd5af48ecedeecac656669eb4a8019f /include | |
| parent | bpf: Fix a segment issue when downgrading gso_size (diff) | |
| download | linux-d5e726d9143c5624135f5dc9e4069799adeef734.tar.xz linux-d5e726d9143c5624135f5dc9e4069799adeef734.zip | |
xsk: Require XDP_UMEM_TX_METADATA_LEN to actuate tx_metadata_len
Julian reports that commit 341ac980eab9 ("xsk: Support tx_metadata_len")
can break existing use cases which don't zero-initialize xdp_umem_reg
padding. Introduce new XDP_UMEM_TX_METADATA_LEN to make sure we
interpret the padding as tx_metadata_len only when being explicitly
asked.
Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
Reported-by: Julian Schindel <mail@arctic-alpaca.de>
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/bpf/20240713015253.121248-2-sdf@fomichev.me
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/if_xdp.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/if_xdp.h b/include/uapi/linux/if_xdp.h index d31698410410..42ec5ddaab8d 100644 --- a/include/uapi/linux/if_xdp.h +++ b/include/uapi/linux/if_xdp.h @@ -41,6 +41,10 @@ */ #define XDP_UMEM_TX_SW_CSUM (1 << 1) +/* Request to reserve tx_metadata_len bytes of per-chunk metadata. + */ +#define XDP_UMEM_TX_METADATA_LEN (1 << 2) + struct sockaddr_xdp { __u16 sxdp_family; __u16 sxdp_flags; |