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Diffstat (limited to 'src/plugins/nat/nat44-ed/nat44_ed_out2in.c')
-rw-r--r--src/plugins/nat/nat44-ed/nat44_ed_out2in.c37
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)
{