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authorMohsin Kazmi <sykazmi@cisco.com>2019-12-09 11:46:01 +0100
committerAndrew Yourtchenko <ayourtch@gmail.com>2019-12-17 16:57:46 +0000
commit70ae4efaa9b719a0bc84345143a1a4d3944a70fe (patch)
tree5f67801b82dbd836ed1f1c1e278f4d027148c0d6 /src/vnet
parent328631d4eeac808d761471777f2bea5e64387e5e (diff)
gso: minor fixes to gso segmentation
Type: fix Change-Id: I01602ba7f1a4820c7790a771a5a7281ed66ff905 Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/gso/node.c225
1 files changed, 115 insertions, 110 deletions
diff --git a/src/vnet/gso/node.c b/src/vnet/gso/node.c
index 548189ee04c..d7248c90147 100644
--- a/src/vnet/gso/node.c
+++ b/src/vnet/gso/node.c
@@ -43,6 +43,10 @@ format_gso_trace (u8 * s, va_list * args)
s = format (s, "gso_sz %d gso_l4_hdr_sz %d",
t->gso_size, t->gso_l4_hdr_sz);
}
+ else
+ {
+ s = format (s, "non-gso buffer");
+ }
return s;
}
@@ -238,6 +242,8 @@ tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
if (0 == dst_left && total_src_left)
{
n_tx_bytes += cdb0->current_length;
+ tso_fixup_segmented_buf (cdb0, tcp_flags_no_fin_psh, is_ip6,
+ gho);
ASSERT (dbi < vec_len (ptd->split_buffers));
cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
@@ -301,108 +307,109 @@ vnet_gso_node_inline (vlib_main_t * vm,
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (from + 8 <= from_end && n_left_to_next >= 4)
- {
- u32 bi0, bi1, bi2, bi3;
- u32 next0, next1, next2, next3;
- u32 swif0, swif1, swif2, swif3;
- gso_trace_t *t0, *t1, *t2, *t3;
- vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
-
- /* Prefetch next iteration. */
- vlib_prefetch_buffer_header (b[4], LOAD);
- vlib_prefetch_buffer_header (b[5], LOAD);
- vlib_prefetch_buffer_header (b[6], LOAD);
- vlib_prefetch_buffer_header (b[7], LOAD);
-
- bi0 = from[0];
- bi1 = from[1];
- bi2 = from[2];
- bi3 = from[3];
- to_next[0] = bi0;
- to_next[1] = bi1;
- to_next[2] = bi2;
- to_next[3] = bi3;
-
- swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
- swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
- swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
- swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
-
- if (PREDICT_FALSE (hi->sw_if_index != swif0))
- {
- hi0 = vnet_get_sup_hw_interface (vnm, swif0);
- if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
- (b[0]->flags & VNET_BUFFER_F_GSO))
- break;
- }
- if (PREDICT_FALSE (hi->sw_if_index != swif1))
- {
- hi1 = vnet_get_sup_hw_interface (vnm, swif0);
- if (!(hi1->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
- (b[1]->flags & VNET_BUFFER_F_GSO))
- break;
- }
- if (PREDICT_FALSE (hi->sw_if_index != swif2))
- {
- hi2 = vnet_get_sup_hw_interface (vnm, swif0);
- if ((hi2->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
- (b[2]->flags & VNET_BUFFER_F_GSO))
- break;
- }
- if (PREDICT_FALSE (hi->sw_if_index != swif3))
- {
- hi3 = vnet_get_sup_hw_interface (vnm, swif0);
- if (!(hi3->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
- (b[3]->flags & VNET_BUFFER_F_GSO))
- break;
- }
-
- if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
- {
- t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
- t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
- t0->gso_size = vnet_buffer2 (b[0])->gso_size;
- t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
- }
- if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
- {
- t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
- t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
- t1->gso_size = vnet_buffer2 (b[1])->gso_size;
- t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
- }
- if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
- {
- t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
- t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
- t2->gso_size = vnet_buffer2 (b[2])->gso_size;
- t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
- }
- if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
- {
- t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
- t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
- t3->gso_size = vnet_buffer2 (b[3])->gso_size;
- t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
- }
-
- from += 4;
- to_next += 4;
- n_left_to_next -= 4;
- n_left_from -= 4;
-
- next0 = next1 = 0;
- next2 = next3 = 0;
- vnet_feature_next (&next0, b[0]);
- vnet_feature_next (&next1, b[1]);
- vnet_feature_next (&next2, b[2]);
- vnet_feature_next (&next3, b[3]);
- vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
- n_left_to_next, bi0, bi1, bi2, bi3,
- next0, next1, next2, next3);
- b += 4;
- }
+ if (!do_segmentation)
+ while (from + 8 <= from_end && n_left_to_next >= 4)
+ {
+ u32 bi0, bi1, bi2, bi3;
+ u32 next0, next1, next2, next3;
+ u32 swif0, swif1, swif2, swif3;
+ gso_trace_t *t0, *t1, *t2, *t3;
+ vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
+
+ /* Prefetch next iteration. */
+ vlib_prefetch_buffer_header (b[4], LOAD);
+ vlib_prefetch_buffer_header (b[5], LOAD);
+ vlib_prefetch_buffer_header (b[6], LOAD);
+ vlib_prefetch_buffer_header (b[7], LOAD);
+
+ bi0 = from[0];
+ bi1 = from[1];
+ bi2 = from[2];
+ bi3 = from[3];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ to_next[2] = bi2;
+ to_next[3] = bi3;
+
+ swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
+ swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
+ swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
+ swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
+
+ if (PREDICT_FALSE (hi->sw_if_index != swif0))
+ {
+ hi0 = vnet_get_sup_hw_interface (vnm, swif0);
+ if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
+ (b[0]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+ if (PREDICT_FALSE (hi->sw_if_index != swif1))
+ {
+ hi1 = vnet_get_sup_hw_interface (vnm, swif0);
+ if (!(hi1->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
+ (b[1]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+ if (PREDICT_FALSE (hi->sw_if_index != swif2))
+ {
+ hi2 = vnet_get_sup_hw_interface (vnm, swif0);
+ if ((hi2->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
+ (b[2]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+ if (PREDICT_FALSE (hi->sw_if_index != swif3))
+ {
+ hi3 = vnet_get_sup_hw_interface (vnm, swif0);
+ if (!(hi3->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
+ (b[3]->flags & VNET_BUFFER_F_GSO))
+ break;
+ }
+
+ if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
+ t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
+ t0->gso_size = vnet_buffer2 (b[0])->gso_size;
+ t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
+ }
+ if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
+ t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
+ t1->gso_size = vnet_buffer2 (b[1])->gso_size;
+ t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
+ }
+ if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
+ t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
+ t2->gso_size = vnet_buffer2 (b[2])->gso_size;
+ t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
+ }
+ if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
+ t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
+ t3->gso_size = vnet_buffer2 (b[3])->gso_size;
+ t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
+ }
+
+ from += 4;
+ to_next += 4;
+ n_left_to_next -= 4;
+ n_left_from -= 4;
+
+ next0 = next1 = 0;
+ next2 = next3 = 0;
+ vnet_feature_next (&next0, b[0]);
+ vnet_feature_next (&next1, b[1]);
+ vnet_feature_next (&next2, b[2]);
+ vnet_feature_next (&next3, b[3]);
+ vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, bi2,
+ bi3, next0, next1, next2, next3);
+ b += 4;
+ }
while (from + 1 <= from_end && n_left_to_next > 0)
{
@@ -410,6 +417,7 @@ vnet_gso_node_inline (vlib_main_t * vm,
gso_trace_t *t0;
vnet_hw_interface_t *hi0;
u32 next0 = 0;
+ u32 do_segmentation0 = 0;
swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
if (PREDICT_FALSE (hi->sw_if_index != swif0))
@@ -417,8 +425,10 @@ vnet_gso_node_inline (vlib_main_t * vm,
hi0 = vnet_get_sup_hw_interface (vnm, swif0);
if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
(b[0]->flags & VNET_BUFFER_F_GSO))
- do_segmentation = 1;
+ do_segmentation0 = 1;
}
+ else
+ do_segmentation0 = do_segmentation;
/* speculatively enqueue b0 to the current next frame */
to_next[0] = bi0 = from[0];
@@ -435,7 +445,7 @@ vnet_gso_node_inline (vlib_main_t * vm,
t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
}
- if (do_segmentation)
+ if (do_segmentation0)
{
if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
{
@@ -543,12 +553,7 @@ vnet_gso_inline (vlib_main_t * vm,
vlib_buffer_t *b = vlib_get_buffer (vm, from[0]);
hi = vnet_get_sup_hw_interface (vnm,
vnet_buffer (b)->sw_if_index[VLIB_TX]);
- /*
- * The 3-headed "if" is here because we want to err on the side
- * of not impacting the non-GSO performance - so for the more
- * common case of no GSO interfaces we want to prevent the
- * segmentation codepath from being there altogether.
- */
+
if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
return vnet_gso_node_inline (vm, node, frame, vnm, hi,
is_ip6, /* do_segmentation */ 0);