lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-Id: <20230529155024.222213-14-maciej.fijalkowski@intel.com> Date: Mon, 29 May 2023 17:50:15 +0200 From: Maciej Fijalkowski <maciej.fijalkowski@...el.com> To: bpf@...r.kernel.org, ast@...nel.org, daniel@...earbox.net, andrii@...nel.org Cc: netdev@...r.kernel.org, magnus.karlsson@...el.com, bjorn@...nel.org, tirthendu.sarkar@...el.com, Maciej Fijalkowski <maciej.fijalkowski@...el.com> Subject: [PATCH v2 bpf-next 13/22] xsk: report ZC multi-buffer capability via xdp_features Introduce new xdp_feature NETDEV_XDP_ACT_NDO_ZC_SG that will be used to find out if user space that wants to do ZC multi-buffer will be able to do so against underlying ZC driver. Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com> --- include/uapi/linux/netdev.h | 4 ++-- net/xdp/xsk_buff_pool.c | 6 ++++++ 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h index 639524b59930..bfca07224f7b 100644 --- a/include/uapi/linux/netdev.h +++ b/include/uapi/linux/netdev.h @@ -33,8 +33,8 @@ enum netdev_xdp_act { NETDEV_XDP_ACT_HW_OFFLOAD = 16, NETDEV_XDP_ACT_RX_SG = 32, NETDEV_XDP_ACT_NDO_XMIT_SG = 64, - - NETDEV_XDP_ACT_MASK = 127, + NETDEV_XDP_ACT_NDO_ZC_SG = 128, + NETDEV_XDP_ACT_MASK = 255, }; enum { diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c index 0a9f8ea68de3..43cca5fa90cf 100644 --- a/net/xdp/xsk_buff_pool.c +++ b/net/xdp/xsk_buff_pool.c @@ -189,6 +189,12 @@ int xp_assign_dev(struct xsk_buff_pool *pool, goto err_unreg_pool; } + if (!(netdev->xdp_features & NETDEV_XDP_ACT_NDO_ZC_SG) && + flags & XDP_USE_SG) { + err = -EOPNOTSUPP; + goto err_unreg_pool; + } + bpf.command = XDP_SETUP_XSK_POOL; bpf.xsk.pool = pool; bpf.xsk.queue_id = queue_id; -- 2.35.3
Powered by blists - more mailing lists