On 1/20/25 5:28 PM, Jason Xing wrote:
Support SCM_TSTAMP_SND case. Then we will get the software timestamp when the driver is about to send the skb. Later, I will support the hardware timestamp. Signed-off-by: Jason Xing <kerneljasonxing@xxxxxxxxx> --- include/linux/skbuff.h | 2 +- include/uapi/linux/bpf.h | 5 +++++ net/core/skbuff.c | 10 ++++++++-- tools/include/uapi/linux/bpf.h | 5 +++++ 4 files changed, 19 insertions(+), 3 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 35c2e864dd4b..de8d3bd311f5 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -4569,7 +4569,7 @@ void skb_tstamp_tx(struct sk_buff *orig_skb, static inline void skb_tx_timestamp(struct sk_buff *skb) { skb_clone_tx_timestamp(skb); - if (skb_shinfo(skb)->tx_flags & SKBTX_SW_TSTAMP) + if (skb_shinfo(skb)->tx_flags & (SKBTX_SW_TSTAMP | SKBTX_BPF)) __skb_tstamp_tx(skb, NULL, NULL, skb->sk, true, SCM_TSTAMP_SND); }diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.hindex 72f93c6e45c1..a6d761f07f67 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -7027,6 +7027,11 @@ enum { * feature is on. It indicates the * recorded timestamp. */ + BPF_SOCK_OPS_TS_SW_OPT_CB, /* Called when skb is about to send + * to the nic when SO_TIMESTAMPING
Same comment on the "SO_TIMESTAMPING".
