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authorNeale Ranns <nranns@cisco.com>2017-04-21 01:07:59 -0700
committerDamjan Marion <dmarion.lists@gmail.com>2017-04-26 15:31:41 +0000
commit227038a444b98f922b4a4f44b85ae60f9ee86e1c (patch)
treed4268410e3f860bb01386f4242e023324885801d
parent9806eae1f5f3953f7ac2c5bd07061a94387d757e (diff)
IP Flow Hash Config fixes
- the flow hash config is (and was) cached on the load-balance object so the fib_table_t struct is not used a switch time. Therefore changes to the table's flow hash config need to be propagated to all load-balances and hance all FIB entries in the table. - enable API for setting the IPv6 table flow hash config - use only the hash config in the fib_table_t object and not on the ipX_fib_t - add tests. Change-Id: Ib804c11162c6d4972c764957562c372f663e05d4 Signed-off-by: Neale Ranns <nranns@cisco.com>
-rw-r--r--src/vnet/fib/fib_entry.c29
-rw-r--r--src/vnet/fib/fib_entry.h2
-rw-r--r--src/vnet/fib/fib_table.c54
-rw-r--r--src/vnet/fib/fib_table.h19
-rw-r--r--src/vnet/fib/fib_test.c23
-rw-r--r--src/vnet/fib/ip4_fib.c12
-rw-r--r--src/vnet/fib/ip4_fib.h6
-rw-r--r--src/vnet/fib/ip6_fib.c12
-rw-r--r--src/vnet/fib/ip6_fib.h2
-rw-r--r--src/vnet/fib/mpls_fib.c18
-rw-r--r--src/vnet/fib/mpls_fib.h7
-rw-r--r--src/vnet/ip/ip4_forward.c5
-rw-r--r--src/vnet/ip/ip6.h3
-rw-r--r--src/vnet/ip/ip6_forward.c12
-rw-r--r--src/vnet/ip/ip_api.c12
-rw-r--r--src/vnet/mpls/mpls_tunnel.c18
-rw-r--r--src/vpp/api/api.c3
-rw-r--r--test/test_ip4.py137
-rw-r--r--test/test_ip6.py149
-rw-r--r--test/vpp_papi_provider.py19
20 files changed, 468 insertions, 74 deletions
diff --git a/src/vnet/fib/fib_entry.c b/src/vnet/fib/fib_entry.c
index 6f811aa1414..29f5b35965d 100644
--- a/src/vnet/fib/fib_entry.c
+++ b/src/vnet/fib/fib_entry.c
@@ -1390,6 +1390,35 @@ fib_entry_is_resolved (fib_node_index_t fib_entry_index)
}
}
+void
+fib_entry_set_flow_hash_config (fib_node_index_t fib_entry_index,
+ flow_hash_config_t hash_config)
+{
+ fib_entry_t *fib_entry;
+
+ fib_entry = fib_entry_get(fib_entry_index);
+
+ /*
+ * pass the hash-config on to the load-balance object where it is cached.
+ * we can ignore LBs in the delegate chains, since they will not be of the
+ * correct protocol type (i.e. they are not IP)
+ * There's no way, nor need, to change the hash config for MPLS.
+ */
+ if (dpo_id_is_valid(&fib_entry->fe_lb))
+ {
+ load_balance_t *lb;
+
+ ASSERT(DPO_LOAD_BALANCE == fib_entry->fe_lb.dpoi_type);
+
+ lb = load_balance_get(fib_entry->fe_lb.dpoi_index);
+
+ /*
+ * atomic update for packets in flight
+ */
+ lb->lb_hash_config = hash_config;
+ }
+}
+
static int
fib_ip4_address_compare (const ip4_address_t * a1,
const ip4_address_t * a2)
diff --git a/src/vnet/fib/fib_entry.h b/src/vnet/fib/fib_entry.h
index b17a0b6444c..2196079bd50 100644
--- a/src/vnet/fib/fib_entry.h
+++ b/src/vnet/fib/fib_entry.h
@@ -533,6 +533,8 @@ extern int fib_entry_is_sourced(fib_node_index_t fib_entry_index,
extern fib_node_index_t fib_entry_get_path_list(fib_node_index_t fib_entry_index);
extern int fib_entry_is_resolved(fib_node_index_t fib_entry_index);
+extern void fib_entry_set_flow_hash_config(fib_node_index_t fib_entry_index,
+ flow_hash_config_t hash_config);
extern void fib_entry_module_init(void);
diff --git a/src/vnet/fib/fib_table.c b/src/vnet/fib/fib_table.c
index ff428049b66..d50f17f1ce4 100644
--- a/src/vnet/fib/fib_table.c
+++ b/src/vnet/fib/fib_table.c
@@ -945,18 +945,52 @@ flow_hash_config_t
fib_table_get_flow_hash_config (u32 fib_index,
fib_protocol_t proto)
{
- switch (proto)
- {
- case FIB_PROTOCOL_IP4:
- return (ip4_fib_table_get_flow_hash_config(fib_index));
- case FIB_PROTOCOL_IP6:
- return (ip6_fib_table_get_flow_hash_config(fib_index));
- case FIB_PROTOCOL_MPLS:
- return (mpls_fib_table_get_flow_hash_config(fib_index));
- }
- return (0);
+ fib_table_t *fib;
+
+ fib = fib_table_get(fib_index, proto);
+
+ return (fib->ft_flow_hash_config);
}
+/**
+ * @brief Table set flow hash config context.
+ */
+typedef struct fib_table_set_flow_hash_config_ctx_t_
+{
+ /**
+ * the flow hash config to set
+ */
+ flow_hash_config_t hash_config;
+} fib_table_set_flow_hash_config_ctx_t;
+
+static int
+fib_table_set_flow_hash_config_cb (fib_node_index_t fib_entry_index,
+ void *arg)
+{
+ fib_table_set_flow_hash_config_ctx_t *ctx = arg;
+
+ fib_entry_set_flow_hash_config(fib_entry_index, ctx->hash_config);
+
+ return (1);
+}
+
+void
+fib_table_set_flow_hash_config (u32 fib_index,
+ fib_protocol_t proto,
+ flow_hash_config_t hash_config)
+{
+ fib_table_set_flow_hash_config_ctx_t ctx = {
+ .hash_config = hash_config,
+ };
+ fib_table_t *fib;
+
+ fib = fib_table_get(fib_index, proto);
+ fib->ft_flow_hash_config = hash_config;
+
+ fib_table_walk(fib_index, proto,
+ fib_table_set_flow_hash_config_cb,
+ &ctx);
+}
u32
fib_table_get_table_id_for_sw_if_index (fib_protocol_t proto,
diff --git a/src/vnet/fib/fib_table.h b/src/vnet/fib/fib_table.h
index f24d28b7711..21773342428 100644
--- a/src/vnet/fib/fib_table.h
+++ b/src/vnet/fib/fib_table.h
@@ -667,6 +667,25 @@ extern flow_hash_config_t fib_table_get_flow_hash_config(u32 fib_index,
/**
* @brief
+ * Set the flow hash configured used by the table
+ *
+ * @param fib_index
+ * The index of the FIB
+ *
+ * @paran proto
+ * The protocol of the FIB (and thus the entries therein)
+ *
+ * @param hash_config
+ * The flow-hash config to set
+ *
+ * @return none
+ */
+extern void fib_table_set_flow_hash_config(u32 fib_index,
+ fib_protocol_t proto,
+ flow_hash_config_t hash_config);
+
+/**
+ * @brief
* Take a reference counting lock on the table
*
* @param fib_index
diff --git a/src/vnet/fib/fib_test.c b/src/vnet/fib/fib_test.c
index d3bdfa35c06..ddea6b86e7e 100644
--- a/src/vnet/fib/fib_test.c
+++ b/src/vnet/fib/fib_test.c
@@ -3832,6 +3832,29 @@ fib_test_v4 (void)
fib_table_entry_delete(fib_index,
&pfx_10_10_10_127_s_32,
FIB_SOURCE_ADJ);
+ /*
+ * change the table's flow-hash config - expect the update to propagete to
+ * the entries' load-balance objects
+ */
+ flow_hash_config_t old_hash_config, new_hash_config;
+
+ old_hash_config = fib_table_get_flow_hash_config(fib_index,
+ FIB_PROTOCOL_IP4);
+ new_hash_config = (IP_FLOW_HASH_SRC_ADDR |
+ IP_FLOW_HASH_DST_ADDR);
+
+ fei = fib_table_lookup_exact_match(fib_index, &pfx_10_10_10_1_s_32);
+ dpo = fib_entry_contribute_ip_forwarding(fei);
+ lb = load_balance_get(dpo->dpoi_index);
+ FIB_TEST((lb->lb_hash_config == old_hash_config),
+ "Table and LB hash config match: %U",
+ format_ip_flow_hash_config, lb->lb_hash_config);
+
+ fib_table_set_flow_hash_config(fib_index, FIB_PROTOCOL_IP4, new_hash_config);
+
+ FIB_TEST((lb->lb_hash_config == new_hash_config),
+ "Table and LB newhash config match: %U",
+ format_ip_flow_hash_config, lb->lb_hash_config);
/*
* CLEANUP
diff --git a/src/vnet/fib/ip4_fib.c b/src/vnet/fib/ip4_fib.c
index 8e92d851b45..878b4dbf948 100644
--- a/src/vnet/fib/ip4_fib.c
+++ b/src/vnet/fib/ip4_fib.c
@@ -124,9 +124,7 @@ ip4_create_fib_with_table_id (u32 table_id)
fib_table->ft_table_id =
v4_fib->table_id =
table_id;
- fib_table->ft_flow_hash_config =
- v4_fib->flow_hash_config =
- IP_FLOW_HASH_DEFAULT;
+ fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
v4_fib->fwd_classify_table_index = ~0;
v4_fib->rev_classify_table_index = ~0;
@@ -233,12 +231,6 @@ ip4_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
return (ip4_main.fib_index_by_sw_if_index[sw_if_index]);
}
-flow_hash_config_t
-ip4_fib_table_get_flow_hash_config (u32 fib_index)
-{
- return (ip4_fib_get(fib_index)->flow_hash_config);
-}
-
/*
* ip4_fib_table_lookup_exact_match
*
@@ -542,7 +534,7 @@ ip4_show_fib (vlib_main_t * vm,
vlib_cli_output (vm, "%U, fib_index %d, flow hash: %U",
format_fib_table_name, fib->index, FIB_PROTOCOL_IP4,
fib->index,
- format_ip_flow_hash_config, fib->flow_hash_config);
+ format_ip_flow_hash_config, fib_table->ft_flow_hash_config);
/* Show summary? */
if (! verbose)
diff --git a/src/vnet/fib/ip4_fib.h b/src/vnet/fib/ip4_fib.h
index 4cf9e58a380..006163b4d13 100644
--- a/src/vnet/fib/ip4_fib.h
+++ b/src/vnet/fib/ip4_fib.h
@@ -53,9 +53,6 @@ typedef struct ip4_fib_t_
/* Index into FIB vector. */
u32 index;
- /* flow hash configuration */
- flow_hash_config_t flow_hash_config;
-
/* N-tuple classifier indices */
u32 fwd_classify_table_index;
u32 rev_classify_table_index;
@@ -149,9 +146,6 @@ u32 ip4_fib_index_from_table_id (u32 table_id)
extern u32 ip4_fib_table_get_index_for_sw_if_index(u32 sw_if_index);
-extern flow_hash_config_t ip4_fib_table_get_flow_hash_config(u32 fib_index);
-
-
always_inline index_t
ip4_fib_forwarding_lookup (u32 fib_index,
const ip4_address_t * addr)
diff --git a/src/vnet/fib/ip6_fib.c b/src/vnet/fib/ip6_fib.c
index d00f4c558b2..e046b3494e9 100644
--- a/src/vnet/fib/ip6_fib.c
+++ b/src/vnet/fib/ip6_fib.c
@@ -74,9 +74,7 @@ create_fib_with_table_id (u32 table_id)
fib_table->ft_table_id =
v6_fib->table_id =
table_id;
- fib_table->ft_flow_hash_config =
- v6_fib->flow_hash_config =
- IP_FLOW_HASH_DEFAULT;
+ fib_table->ft_flow_hash_config = IP_FLOW_HASH_DEFAULT;
vnet_ip6_fib_init(fib_table->ft_index);
fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_IP6);
@@ -390,12 +388,6 @@ u32 ip6_fib_table_fwding_lookup_with_if_index (ip6_main_t * im,
return ip6_fib_table_fwding_lookup(im, fib_index, dst);
}
-flow_hash_config_t
-ip6_fib_table_get_flow_hash_config (u32 fib_index)
-{
- return (ip6_fib_get(fib_index)->flow_hash_config);
-}
-
u32
ip6_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
{
@@ -643,7 +635,7 @@ ip6_show_fib (vlib_main_t * vm,
vlib_cli_output (vm, "%s, fib_index %d, flow hash: %U",
fib_table->ft_desc, fib->index,
- format_ip_flow_hash_config, fib->flow_hash_config);
+ format_ip_flow_hash_config, fib_table->ft_flow_hash_config);
/* Show summary? */
if (! verbose)
diff --git a/src/vnet/fib/ip6_fib.h b/src/vnet/fib/ip6_fib.h
index e2f28452423..2bf8ef7821c 100644
--- a/src/vnet/fib/ip6_fib.h
+++ b/src/vnet/fib/ip6_fib.h
@@ -133,7 +133,5 @@ u32 ip6_fib_index_from_table_id (u32 table_id)
extern u32 ip6_fib_table_get_index_for_sw_if_index(u32 sw_if_index);
-extern flow_hash_config_t ip6_fib_table_get_flow_hash_config(u32 fib_index);
-
#endif
diff --git a/src/vnet/fib/mpls_fib.c b/src/vnet/fib/mpls_fib.c
index 19f9f3c1432..ca6271fe3d7 100644
--- a/src/vnet/fib/mpls_fib.c
+++ b/src/vnet/fib/mpls_fib.c
@@ -61,11 +61,6 @@
*/
static index_t mpls_fib_drop_dpo_index = INDEX_INVALID;
-/**
- * FIXME
- */
-#define MPLS_FLOW_HASH_DEFAULT 0
-
static inline u32
mpls_fib_entry_mk_key (mpls_label_t label,
mpls_eos_bit_t eos)
@@ -109,10 +104,8 @@ mpls_fib_create_with_table_id (u32 table_id)
hash_set (mpls_main.fib_index_by_table_id, table_id, fib_table->ft_index);
- fib_table->ft_table_id =
- table_id;
- fib_table->ft_flow_hash_config =
- MPLS_FLOW_HASH_DEFAULT;
+ fib_table->ft_table_id = table_id;
+ fib_table->ft_flow_hash_config = MPLS_FLOW_HASH_DEFAULT;
fib_table_lock(fib_table->ft_index, FIB_PROTOCOL_MPLS);
@@ -350,13 +343,6 @@ mpls_fib_forwarding_table_reset (mpls_fib_t *mf,
mf->mf_lbs[key] = mpls_fib_drop_dpo_index;
}
-flow_hash_config_t
-mpls_fib_table_get_flow_hash_config (u32 fib_index)
-{
- // FIXME.
- return (0);
-}
-
void
mpls_fib_table_walk (mpls_fib_t *mpls_fib,
fib_table_walk_fn_t fn,
diff --git a/src/vnet/fib/mpls_fib.h b/src/vnet/fib/mpls_fib.h
index 78a61a14d00..dfb8b7fc37a 100644
--- a/src/vnet/fib/mpls_fib.h
+++ b/src/vnet/fib/mpls_fib.h
@@ -33,6 +33,11 @@
#define MPLS_FIB_KEY_SIZE 21
#define MPLS_FIB_DB_SIZE (1 << (MPLS_FIB_KEY_SIZE-1))
+/**
+ * There are no options for controlling the MPLS flow hash
+ */
+#define MPLS_FLOW_HASH_DEFAULT 0
+
typedef struct mpls_fib_t_
{
/**
@@ -130,6 +135,4 @@ mpls_fib_table_get_index_for_sw_if_index (u32 sw_if_index)
return (mm->fib_index_by_sw_if_index[sw_if_index]);
}
-extern flow_hash_config_t mpls_fib_table_get_flow_hash_config(u32 fib_index);
-
#endif
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index 697d2169b10..d85f76d46c0 100644
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -3020,7 +3020,6 @@ VLIB_CLI_COMMAND (lookup_test_command, static) =
int
vnet_set_ip4_flow_hash (u32 table_id, u32 flow_hash_config)
{
- ip4_fib_t *fib;
u32 fib_index;
fib_index = fib_table_find (FIB_PROTOCOL_IP4, table_id);
@@ -3028,9 +3027,9 @@ vnet_set_ip4_flow_hash (u32 table_id, u32 flow_hash_config)
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
- fib = ip4_fib_get (fib_index);
+ fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP4,
+ flow_hash_config);
- fib->flow_hash_config = flow_hash_config;
return 0;
}
diff --git a/src/vnet/ip/ip6.h b/src/vnet/ip/ip6.h
index bf7ec7d5efb..d623c95f52f 100644
--- a/src/vnet/ip/ip6.h
+++ b/src/vnet/ip/ip6.h
@@ -71,9 +71,6 @@ typedef struct
/* Index into FIB vector. */
u32 index;
-
- /* flow hash configuration */
- flow_hash_config_t flow_hash_config;
} ip6_fib_t;
typedef struct ip6_mfib_t
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 3bc07d0e679..0ad96d0b9e0 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -267,11 +267,10 @@ ip6_lookup_inline (vlib_main_t * vm,
(vnet_buffer (p0)->sw_if_index[VLIB_TX] ==
(u32) ~ 0) ? fib_index0 : vnet_buffer (p0)->sw_if_index[VLIB_TX];
- flow_hash_config0 = ip6_fib_get (fib_index0)->flow_hash_config;
-
lbi0 = ip6_fib_table_fwding_lookup (im, fib_index0, dst_addr0);
lb0 = load_balance_get (lbi0);
+ flow_hash_config0 = lb0->lb_hash_config;
vnet_buffer (p0)->ip.flow_hash = 0;
ASSERT (lb0->lb_n_buckets > 0);
@@ -3156,7 +3155,6 @@ VLIB_CLI_COMMAND (test_link_command, static) =
int
vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
{
- ip6_fib_t *fib;
u32 fib_index;
fib_index = fib_table_find (FIB_PROTOCOL_IP6, table_id);
@@ -3164,10 +3162,10 @@ vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config)
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
- fib = ip6_fib_get (fib_index);
+ fib_table_set_flow_hash_config (fib_index, FIB_PROTOCOL_IP6,
+ flow_hash_config);
- fib->flow_hash_config = flow_hash_config;
- return 1;
+ return 0;
}
static clib_error_t *
@@ -3199,7 +3197,7 @@ set_ip6_flow_hash_command_fn (vlib_main_t * vm,
rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
switch (rv)
{
- case 1:
+ case 0:
break;
case -1:
diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index 9c9cb4a445a..2680d6010dc 100644
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -1336,9 +1336,17 @@ static void
set_ip6_flow_hash (vl_api_set_ip_flow_hash_t * mp)
{
vl_api_set_ip_flow_hash_reply_t *rmp;
- int rv = VNET_API_ERROR_UNIMPLEMENTED;
+ int rv;
+ u32 table_id;
+ flow_hash_config_t flow_hash_config = 0;
+
+ table_id = ntohl (mp->vrf_id);
+
+#define _(a,b) if (mp->a) flow_hash_config |= b;
+ foreach_flow_hash_bit;
+#undef _
- clib_warning ("unimplemented...");
+ rv = vnet_set_ip6_flow_hash (table_id, flow_hash_config);
REPLY_MACRO (VL_API_SET_IP_FLOW_HASH_REPLY);
}
diff --git a/src/vnet/mpls/mpls_tunnel.c b/src/vnet/mpls/mpls_tunnel.c
index 1254dd9ddfb..457d48eb6bf 100644
--- a/src/vnet/mpls/mpls_tunnel.c
+++ b/src/vnet/mpls/mpls_tunnel.c
@@ -24,6 +24,7 @@
#include <vnet/adj/adj_midchain.h>
#include <vnet/adj/adj_mcast.h>
#include <vnet/dpo/replicate_dpo.h>
+#include <vnet/fib/mpls_fib.h>
/**
* @brief pool of tunnel instances
@@ -200,9 +201,20 @@ mpls_tunnel_mk_lb (mpls_tunnel_t *mt,
{
flow_hash_config_t fhc;
- fhc = 0; // FIXME
- /* fhc = fib_table_get_flow_hash_config(fib_entry->fe_fib_index, */
- /* dpo_proto_to_fib(lb_proto)); */
+ switch (linkt)
+ {
+ case VNET_LINK_MPLS:
+ fhc = MPLS_FLOW_HASH_DEFAULT;
+ break;
+ case VNET_LINK_IP4:
+ case VNET_LINK_IP6:
+ fhc = IP_FLOW_HASH_DEFAULT;
+ break;
+ default:
+ fhc = 0;
+ break;
+ }
+
dpo_set(dpo_lb,
DPO_LOAD_BALANCE,
lb_proto,
diff --git a/src/vpp/api/api.c b/src/vpp/api/api.c
index f1b6877f85b..9c230574bf8 100644
--- a/src/vpp/api/api.c
+++ b/src/vpp/api/api.c
@@ -971,6 +971,9 @@ ip6_reset_fib_t_handler (vl_api_reset_fib_t * mp)
vec_reset_length (sw_if_indices_to_shut);
+ /* Set the flow hash for this fib to the default */
+ vnet_set_ip6_flow_hash (fib->table_id, IP_FLOW_HASH_DEFAULT);
+
/* Shut down interfaces in this FIB / clean out intfc routes */
pool_foreach (si, im->sw_interfaces,
({
diff --git a/test/test_ip4.py b/test/test_ip4.py
index ed364b62cbb..3fe61e266be 100644
--- a/test/test_ip4.py
+++ b/test/test_ip4.py
@@ -766,5 +766,142 @@ class TestIPSubNets(VppTestCase):
rx = self.pg1.get_capture(1)
+class TestIPLoadBalance(VppTestCase):
+ """ IPv4 Load-Balancing """
+
+ def setUp(self):
+ super(TestIPLoadBalance, self).setUp()
+
+ self.create_pg_interfaces(range(5))
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ def tearDown(self):
+ super(TestIPLoadBalance, self).tearDown()
+ for i in self.pg_interfaces:
+ i.unconfig_ip4()
+ i.admin_down()
+
+ def send_and_expect_load_balancing(self, input, pkts, outputs):
+ input.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ for oo in outputs:
+ rx = oo._get_capture(1)
+ self.assertNotEqual(0, len(rx))
+
+ def test_ip_load_balance(self):
+ """ IP Load-Balancing """
+
+ #
+ # An array of packets that differ only in the destination port
+ #
+ port_pkts = []
+
+ #
+ # An array of packets that differ only in the source address
+ #
+ src_pkts = []
+
+ for ii in range(65):
+ port_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(dst="10.0.0.1", src="20.0.0.1") /
+ UDP(sport=1234, dport=1234 + ii) /
+ Raw('\xa5' * 100)))
+ src_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(dst="10.0.0.1", src="20.0.0.%d" % ii) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100)))
+
+ route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
+ [VppRoutePath(self.pg1.remote_ip4,
+ self.pg1.sw_if_index),
+ VppRoutePath(self.pg2.remote_ip4,
+ self.pg2.sw_if_index)])
+ route_10_0_0_1.add_vpp_config()
+
+ #
+ # inject the packet on pg0 - expect load-balancing across the 2 paths
+ # - since the default hash config is to use IP src,dst and port
+ # src,dst
+ # We are not going to ensure equal amounts of packets across each link,
+ # since the hash algorithm is statistical and therefore this can never
+ # be guaranteed. But wuth 64 different packets we do expect some
+ # balancing. So instead just ensure there is traffic on each link.
+ #
+ self.send_and_expect_load_balancing(self.pg0, port_pkts,
+ [self.pg1, self.pg2])
+ self.send_and_expect_load_balancing(self.pg0, src_pkts,
+ [self.pg1, self.pg2])
+
+ #
+ # change the flow hash config so it's only IP src,dst
+ # - now only the stream with differing source address will
+ # load-balance
+ #
+ self.vapi.set_ip_flow_hash(0, src=1, dst=1, sport=0, dport=0)
+
+ self.send_and_expect_load_balancing(self.pg0, src_pkts,
+ [self.pg1, self.pg2])
+
+ self.pg0.add_stream(port_pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(len(port_pkts))
+
+ #
+ # change the flow hash config back to defaults
+ #
+ self.vapi.set_ip_flow_hash(0, src=1, dst=1, sport=1, dport=1)
+
+ #
+ # Recursive prefixes
+ # - testing that 2 stages of load-balancing occurs and there is no
+ # polarisation (i.e. only 2 of 4 paths are used)
+ #
+ port_pkts = []
+ src_pkts = []
+
+ for ii in range(257):
+ port_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(dst="1.1.1.1", src="20.0.0.1") /
+ UDP(sport=1234, dport=1234 + ii) /
+ Raw('\xa5' * 100)))
+ src_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(dst="1.1.1.1", src="20.0.0.%d" % ii) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100)))
+
+ route_10_0_0_2 = VppIpRoute(self, "10.0.0.2", 32,
+ [VppRoutePath(self.pg3.remote_ip4,
+ self.pg3.sw_if_index),
+ VppRoutePath(self.pg4.remote_ip4,
+ self.pg4.sw_if_index)])
+ route_10_0_0_2.add_vpp_config()
+
+ route_1_1_1_1 = VppIpRoute(self, "1.1.1.1", 32,
+ [VppRoutePath("10.0.0.2", 0xffffffff),
+ VppRoutePath("10.0.0.1", 0xffffffff)])
+ route_1_1_1_1.add_vpp_config()
+
+ #
+ # inject the packet on pg0 - expect load-balancing across all 4 paths
+ #
+ self.vapi.cli("clear trace")
+ self.send_and_expect_load_balancing(self.pg0, port_pkts,
+ [self.pg1, self.pg2,
+ self.pg3, self.pg4])
+ self.send_and_expect_load_balancing(self.pg0, src_pkts,
+ [self.pg1, self.pg2,
+ self.pg3, self.pg4])
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
diff --git a/test/test_ip6.py b/test/test_ip6.py
index 3ba092305c5..ebeffe20461 100644
--- a/test/test_ip6.py
+++ b/test/test_ip6.py
@@ -1133,5 +1133,154 @@ class TestIPDisabled(VppTestCase):
self.send_and_assert_no_replies(self.pg1, pm, "IPv6 disabled")
+class TestIP6LoadBalance(VppTestCase):
+ """ IPv6 Load-Balancing """
+
+ def setUp(self):
+ super(TestIP6LoadBalance, self).setUp()
+
+ self.create_pg_interfaces(range(5))
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip6()
+ i.resolve_ndp()
+
+ def tearDown(self):
+ super(TestIP6LoadBalance, self).tearDown()
+ for i in self.pg_interfaces:
+ i.unconfig_ip6()
+ i.admin_down()
+
+ def send_and_expect_load_balancing(self, input, pkts, outputs):
+ input.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ for oo in outputs:
+ rx = oo._get_capture(1)
+ self.assertNotEqual(0, len(rx))
+
+ def test_ip6_load_balance(self):
+ """ IPv6 Load-Balancing """
+
+ #
+ # An array of packets that differ only in the destination port
+ #
+ port_pkts = []
+
+ #
+ # An array of packets that differ only in the source address
+ #
+ src_pkts = []
+
+ for ii in range(65):
+ port_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IPv6(dst="3000::1", src="3000:1::1") /
+ UDP(sport=1234, dport=1234 + ii) /
+ Raw('\xa5' * 100)))
+ src_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IPv6(dst="3000::1", src="3000:1::%d" % ii) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100)))
+
+ route_3000_1 = VppIpRoute(self, "3000::1", 128,
+ [VppRoutePath(self.pg1.remote_ip6,
+ self.pg1.sw_if_index,
+ is_ip6=1),
+ VppRoutePath(self.pg2.remote_ip6,
+ self.pg2.sw_if_index,
+ is_ip6=1)],
+ is_ip6=1)
+ route_3000_1.add_vpp_config()
+
+ #
+ # inject the packet on pg0 - expect load-balancing across the 2 paths
+ # - since the default hash config is to use IP src,dst and port
+ # src,dst
+ # We are not going to ensure equal amounts of packets across each link,
+ # since the hash algorithm is statistical and therefore this can never
+ # be guaranteed. But wuth 64 different packets we do expect some
+ # balancing. So instead just ensure there is traffic on each link.
+ #
+ self.send_and_expect_load_balancing(self.pg0, port_pkts,
+ [self.pg1, self.pg2])
+ self.send_and_expect_load_balancing(self.pg0, src_pkts,
+ [self.pg1, self.pg2])
+
+ #
+ # change the flow hash config so it's only IP src,dst
+ # - now only the stream with differing source address will
+ # load-balance
+ #
+ self.vapi.set_ip_flow_hash(0, is_ip6=1, src=1, dst=1, sport=0, dport=0)
+
+ self.send_and_expect_load_balancing(self.pg0, src_pkts,
+ [self.pg1, self.pg2])
+
+ self.pg0.add_stream(port_pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ rx = self.pg2.get_capture(len(port_pkts))
+
+ #
+ # change the flow hash config back to defaults
+ #
+ self.vapi.set_ip_flow_hash(0, is_ip6=1, src=1, dst=1, sport=1, dport=1)
+
+ #
+ # Recursive prefixes
+ # - testing that 2 stages of load-balancing occurs and there is no
+ # polarisation (i.e. only 2 of 4 paths are used)
+ #
+ port_pkts = []
+ src_pkts = []
+
+ for ii in range(257):
+ port_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IPv6(dst="4000::1", src="4000:1::1") /
+ UDP(sport=1234, dport=1234 + ii) /
+ Raw('\xa5' * 100)))
+ src_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IPv6(dst="4000::1", src="4000:1::%d" % ii) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100)))
+
+ route_3000_2 = VppIpRoute(self, "3000::2", 128,
+ [VppRoutePath(self.pg3.remote_ip6,
+ self.pg3.sw_if_index,
+ is_ip6=1),
+ VppRoutePath(self.pg4.remote_ip6,
+ self.pg4.sw_if_index,
+ is_ip6=1)],
+ is_ip6=1)
+ route_3000_2.add_vpp_config()
+
+ route_4000_1 = VppIpRoute(self, "4000::1", 128,
+ [VppRoutePath("3000::1",
+ 0xffffffff,
+ is_ip6=1),
+ VppRoutePath("3000::2",
+ 0xffffffff,
+ is_ip6=1)],
+ is_ip6=1)
+ route_4000_1.add_vpp_config()
+
+ #
+ # inject the packet on pg0 - expect load-balancing across all 4 paths
+ #
+ self.vapi.cli("clear trace")
+ self.send_and_expect_load_balancing(self.pg0, port_pkts,
+ [self.pg1, self.pg2,
+ self.pg3, self.pg4])
+ self.send_and_expect_load_balancing(self.pg0, src_pkts,
+ [self.pg1, self.pg2,
+ self.pg3, self.pg4])
+
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py
index d94c0cb6207..83c4a83b8c9 100644
--- a/test/vpp_papi_provider.py
+++ b/test/vpp_papi_provider.py
@@ -277,6 +277,25 @@ class VppPapiProvider(object):
{'sw_if_index': sw_if_index,
'suppress': suppress})
+ def set_ip_flow_hash(self,
+ table_id,
+ src=1,
+ dst=1,
+ sport=1,
+ dport=1,
+ proto=1,
+ reverse=0,
+ is_ip6=0):
+ return self.api(self.papi.set_ip_flow_hash,
+ {'vrf_id': table_id,
+ 'src': src,
+ 'dst': dst,
+ 'dport': dport,
+ 'sport': sport,
+ 'proto': proto,
+ 'reverse': reverse,
+ 'is_ipv6': is_ip6})
+
def ip6_nd_proxy(self, address, sw_if_index, is_del=0):
return self.api(self.papi.ip6nd_proxy_add_del,
{'address': address,