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Merge "bpf: move MSS calculation under CE check to avoid overhead" into main

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This commit is contained in:
Treehugger Robot 2025-09-15 03:41:29 -07:00 • committed by Android (Google) Code Review
commit 68f55e673a
1 changed files with 16 additions and 18 deletions
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34
bpf/progs/tcpAccECN.c
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@ -299,17 +299,16 @@ DEFINE_BPF_PROG_KVER(schedcls, ingress_accecn_eth, , AID_SYSTEM, 6_1)
return TC_ACT_PIPE;
}
uint32_t ce_packets = 1;
uint16_t *mss_ptr = bpf_l4s_accecn_mss_map_lookup_elem(&flow_key);
if (mss_ptr) {
uint16_t mss = *mss_ptr;
if (mss != 0xFFFF && mss != 0) {
ce_packets = (payload_size / mss) + 1;
}
}
// update the map if CE is marked
if (ip_ecn == 0b11) {
uint32_t ce_packets = 1;
uint16_t *mss_ptr = bpf_l4s_accecn_mss_map_lookup_elem(&flow_key);
if (mss_ptr) {
uint16_t mss = *mss_ptr;
if (mss != 0xFFFF && mss != 0) {
ce_packets = (payload_size / mss) + 1;
}
}
__sync_fetch_and_add(ce_count, ce_packets);
}
@ -547,17 +546,16 @@ DEFINE_BPF_PROG_KVER(schedcls, ingress_accecn_rawip, , AID_SYSTEM, 6_1)
return TC_ACT_PIPE;
}
uint32_t ce_packets = 1;
uint16_t *mss_ptr = bpf_l4s_accecn_mss_map_lookup_elem(&flow_key);
if (mss_ptr) {
uint16_t mss = *mss_ptr;
if (mss != 0xFFFF && mss != 0) {
ce_packets = (payload_size / mss) + 1;
}
}
// update the map if CE is marked
if (ip_ecn == 0b11) {
uint32_t ce_packets = 1;
uint16_t *mss_ptr = bpf_l4s_accecn_mss_map_lookup_elem(&flow_key);
if (mss_ptr) {
uint16_t mss = *mss_ptr;
if (mss != 0xFFFF && mss != 0) {
ce_packets = (payload_size / mss) + 1;
}
}
__sync_fetch_and_add(ce_count, ce_packets);
}