diff options
Diffstat (limited to 'src/plugins/nat/nat44-ed/nat44_ed_out2in.c')
| -rw-r--r-- | src/plugins/nat/nat44-ed/nat44_ed_out2in.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/plugins/nat/nat44-ed/nat44_ed_out2in.c b/src/plugins/nat/nat44-ed/nat44_ed_out2in.c index f46433c9e53..e8cf7c930fa 100644 --- a/src/plugins/nat/nat44-ed/nat44_ed_out2in.c +++ b/src/plugins/nat/nat44-ed/nat44_ed_out2in.c @@ -37,6 +37,15 @@ static char *nat_out2in_ed_error_strings[] = { #undef _ }; +typedef enum +{ + NAT_ED_SP_REASON_NO_REASON, + NAT_ED_SP_REASON_LOOKUP_FAILED, + NAT_ED_SP_REASON_VRF_EXPIRED, + NAT_ED_SP_TCP_CLOSED, + NAT_ED_SP_SESS_EXPIRED, +} nat_slow_path_reason_e; + typedef struct { u32 sw_if_index; @@ -49,9 +58,30 @@ typedef struct u8 is_slow_path; u8 translation_via_i2of; u8 lookup_skipped; + nat_slow_path_reason_e slow_path_reason; } nat44_ed_out2in_trace_t; static u8 * +format_slow_path_reason (u8 *s, va_list *args) +{ + nat_slow_path_reason_e reason = va_arg (*args, nat_slow_path_reason_e); + switch (reason) + { + case NAT_ED_SP_REASON_NO_REASON: + return format (s, "no reason for slow path"); + case NAT_ED_SP_REASON_LOOKUP_FAILED: + return format (s, "slow path because lookup failed"); + case NAT_ED_SP_REASON_VRF_EXPIRED: + return format (s, "slow path because vrf expired"); + case NAT_ED_SP_TCP_CLOSED: + return format (s, "slow path because tcp closed"); + case NAT_ED_SP_SESS_EXPIRED: + return format (s, "slow path because session expired"); + } + return format (s, "invalid reason value"); +} + +static u8 * format_nat44_ed_out2in_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); @@ -85,6 +115,7 @@ format_nat44_ed_out2in_trace (u8 * s, va_list * args) s = format (s, "\n search key %U", format_ed_session_kvp, &t->search_key); } + s = format (s, "\n %U", format_slow_path_reason, t->slow_path_reason); } return s; @@ -790,6 +821,7 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, snat_session_t *s0 = 0; clib_bihash_kv_16_8_t kv0, value0; nat_translation_error_e translation_error = NAT_ED_TRNSL_ERR_SUCCESS; + nat_slow_path_reason_e slow_path_reason = NAT_ED_SP_REASON_NO_REASON; nat_6t_flow_t *f = 0; nat_6t_t lookup; int lookup_skipped = 0; @@ -891,6 +923,7 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, if (clib_bihash_search_16_8 (&sm->flow_hash, &kv0, &value0)) { // flow does not exist go slow path + slow_path_reason = NAT_ED_SP_REASON_LOOKUP_FAILED; next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; goto trace0; } @@ -905,6 +938,7 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, // session is closed, go slow path nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); + slow_path_reason = NAT_ED_SP_REASON_VRF_EXPIRED; next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; goto trace0; } @@ -914,6 +948,7 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, if (now >= s0->tcp_closed_timestamp) { // session is closed, go slow path, freed in slow path + slow_path_reason = NAT_ED_SP_TCP_CLOSED; next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; } else @@ -934,6 +969,7 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, // session is closed, go slow path nat_free_session_data (sm, s0, thread_index, 0); nat_ed_session_delete (sm, s0, thread_index, 1); + slow_path_reason = NAT_ED_SP_SESS_EXPIRED; next[0] = NAT_NEXT_OUT2IN_ED_SLOW_PATH; goto trace0; } @@ -1042,6 +1078,7 @@ nat44_ed_out2in_fast_path_node_fn_inline (vlib_main_t * vm, t->translation_error = translation_error; clib_memcpy (&t->search_key, &kv0, sizeof (t->search_key)); t->lookup_skipped = lookup_skipped; + t->slow_path_reason = slow_path_reason; if (s0) { |