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authorDamjan Marion <damarion@cisco.com>2018-04-13 19:43:39 +0200
committerDamjan Marion <damarion@cisco.com>2018-04-13 19:45:57 +0200
commitfe7d4a2e31529eed5416b38b520fdc84687df03c (patch)
treedd3e603fc305d486840f844d919c87f5d0b4b101 /src/vnet/ip/ip4_forward.c
parentbca9290056b1ee206a05c13bbb46b1b40a8bd804 (diff)
Revert "MTU: Setting of MTU on software interface (instead of hardware interface)"
This reverts commit 70083ee74c3141bbefb185525315f1b34497dcaa. Reverting as this patch is causing following crash: 0: /home/damarion/cisco/vpp3/build-data/../src/vnet/devices/devices.h:131 (vnet_get_device_input_thread_index) assertion `queue_id < vec_len (hw->input_node_thread_index_by_queue)' fails Aborted Change-Id: Ie2a365032110b1f67be7a9d832885b9899813d39 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vnet/ip/ip4_forward.c')
-rw-r--r--src/vnet/ip/ip4_forward.c98
1 files changed, 41 insertions, 57 deletions
diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index 3dce590c807..7c56a294436 100644
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -1940,29 +1940,6 @@ typedef enum
IP4_REWRITE_NEXT_ICMP_ERROR,
} ip4_rewrite_next_t;
-always_inline void
-ip4_mtu_check (vlib_buffer_t * b, u16 buffer_packet_bytes,
- u16 adj_packet_bytes, bool df, u32 * next, u32 * error)
-{
- if (buffer_packet_bytes > adj_packet_bytes)
- {
- *error = IP4_ERROR_MTU_EXCEEDED;
- if (df)
- {
- icmp4_error_set_vnet_buffer
- (b, ICMP4_destination_unreachable,
- ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
- adj_packet_bytes);
- *next = IP4_REWRITE_NEXT_ICMP_ERROR;
- }
- else
- {
- /* Add support for fragmentation here */
- *next = IP4_REWRITE_NEXT_DROP;
- }
- }
-}
-
always_inline uword
ip4_rewrite_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
@@ -2123,20 +2100,26 @@ ip4_rewrite_inline (vlib_main_t * vm,
vnet_buffer (p1)->ip.save_rewrite_length = rw_len1;
/* Check MTU of outgoing interface. */
- ip4_mtu_check (p0, vlib_buffer_length_in_chain (vm, p0),
- adj0[0].rewrite_header.max_l3_packet_bytes,
- ip0->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
- &next0, &error0);
- ip4_mtu_check (p1, vlib_buffer_length_in_chain (vm, p1),
- adj1[0].rewrite_header.max_l3_packet_bytes,
- ip1->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
- &next1, &error1);
-
- /* Guess we are only writing on simple Ethernet header. */
- vnet_rewrite_two_headers (adj0[0], adj1[0],
- ip0, ip1, sizeof (ethernet_header_t));
+ if (vlib_buffer_length_in_chain (vm, p0) >
+ adj0[0].rewrite_header.max_l3_packet_bytes)
+ {
+ error0 = IP4_ERROR_MTU_EXCEEDED;
+ next0 = IP4_REWRITE_NEXT_ICMP_ERROR;
+ icmp4_error_set_vnet_buffer
+ (p0, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
+ 0);
+ }
+ if (vlib_buffer_length_in_chain (vm, p1) >
+ adj1[0].rewrite_header.max_l3_packet_bytes)
+ {
+ error1 = IP4_ERROR_MTU_EXCEEDED;
+ next1 = IP4_REWRITE_NEXT_ICMP_ERROR;
+ icmp4_error_set_vnet_buffer
+ (p1, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
+ 0);
+ }
if (is_mcast)
{
@@ -2160,17 +2143,10 @@ ip4_rewrite_inline (vlib_main_t * vm,
tx_sw_if_index0 = adj0[0].rewrite_header.sw_if_index;
vnet_buffer (p0)->sw_if_index[VLIB_TX] = tx_sw_if_index0;
- if (is_midchain)
- {
- adj0->sub_type.midchain.fixup_func
- (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
- }
-
if (PREDICT_FALSE
(adj0[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
vnet_feature_arc_start (lm->output_feature_arc_index,
tx_sw_if_index0, &next0, p0);
-
}
if (PREDICT_TRUE (error1 == IP4_ERROR_NONE))
{
@@ -2181,18 +2157,16 @@ ip4_rewrite_inline (vlib_main_t * vm,
tx_sw_if_index1 = adj1[0].rewrite_header.sw_if_index;
vnet_buffer (p1)->sw_if_index[VLIB_TX] = tx_sw_if_index1;
- if (is_midchain)
- {
- adj1->sub_type.midchain.fixup_func
- (vm, adj1, p1, adj0->sub_type.midchain.fixup_data);
- }
-
if (PREDICT_FALSE
(adj1[0].rewrite_header.flags & VNET_REWRITE_HAS_FEATURES))
vnet_feature_arc_start (lm->output_feature_arc_index,
tx_sw_if_index1, &next1, p1);
}
+ /* Guess we are only writing on simple Ethernet header. */
+ vnet_rewrite_two_headers (adj0[0], adj1[0],
+ ip0, ip1, sizeof (ethernet_header_t));
+
/*
* Bump the per-adjacency counters
*/
@@ -2211,6 +2185,13 @@ ip4_rewrite_inline (vlib_main_t * vm,
vlib_buffer_length_in_chain (vm, p1) + rw_len1);
}
+ if (is_midchain)
+ {
+ adj0->sub_type.midchain.fixup_func
+ (vm, adj0, p0, adj0->sub_type.midchain.fixup_data);
+ adj1->sub_type.midchain.fixup_func
+ (vm, adj1, p1, adj0->sub_type.midchain.fixup_data);
+ }
if (is_mcast)
{
/*
@@ -2291,7 +2272,6 @@ ip4_rewrite_inline (vlib_main_t * vm,
/* Guess we are only writing on simple Ethernet header. */
vnet_rewrite_one_header (adj0[0], ip0, sizeof (ethernet_header_t));
-
if (is_mcast)
{
/*
@@ -2311,12 +2291,16 @@ ip4_rewrite_inline (vlib_main_t * vm,
vlib_buffer_length_in_chain (vm, p0) + rw_len0);
/* Check MTU of outgoing interface. */
- ip4_mtu_check (p0, vlib_buffer_length_in_chain (vm, p0),
- adj0[0].rewrite_header.max_l3_packet_bytes,
- ip0->flags_and_fragment_offset &
- clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT),
- &next0, &error0);
-
+ if (vlib_buffer_length_in_chain (vm, p0) >
+ adj0[0].rewrite_header.max_l3_packet_bytes)
+ {
+ error0 = IP4_ERROR_MTU_EXCEEDED;
+ next0 = IP4_REWRITE_NEXT_ICMP_ERROR;
+ icmp4_error_set_vnet_buffer
+ (p0, ICMP4_destination_unreachable,
+ ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set,
+ 0);
+ }
if (is_mcast)
{
error0 = ((adj0[0].rewrite_header.sw_if_index ==