summaryrefslogtreecommitdiffstats
path: root/vnet
diff options
context:
space:
mode:
Diffstat (limited to 'vnet')
-rw-r--r--vnet/Makefile.am2
-rw-r--r--vnet/vnet/api_errno.h3
-rw-r--r--vnet/vnet/buffer.h7
-rw-r--r--vnet/vnet/devices/dpdk/dpdk.h4
-rw-r--r--vnet/vnet/devices/dpdk/node.c475
-rw-r--r--vnet/vnet/handoff.c529
-rw-r--r--vnet/vnet/handoff.h228
7 files changed, 809 insertions, 439 deletions
diff --git a/vnet/Makefile.am b/vnet/Makefile.am
index 9feffc50eae..41e066f2616 100644
--- a/vnet/Makefile.am
+++ b/vnet/Makefile.am
@@ -26,6 +26,7 @@ TESTS =
########################################
libvnet_la_SOURCES += \
vnet/config.c \
+ vnet/handoff.c \
vnet/interface.c \
vnet/interface_cli.c \
vnet/interface_format.c \
@@ -39,6 +40,7 @@ nobase_include_HEADERS += \
vnet/buffer.h \
vnet/config.h \
vnet/global_funcs.h \
+ vnet/handoff.h \
vnet/interface.h \
vnet/interface_funcs.h \
vnet/l3_types.h \
diff --git a/vnet/vnet/api_errno.h b/vnet/vnet/api_errno.h
index e22b590bc7c..af6f3971a13 100644
--- a/vnet/vnet/api_errno.h
+++ b/vnet/vnet/api_errno.h
@@ -78,7 +78,8 @@ _(SR_POLICY_NAME_NOT_PRESENT, -84, "Segement routing policy name required") \
_(NOT_RUNNING_AS_ROOT, -85, "Not running as root") \
_(ALREADY_CONNECTED, -86, "Connection to the data plane already exists") \
_(UNSUPPORTED_JNI_VERSION, -87, "Unsupported JNI version") \
-_(FAILED_TO_ATTACH_TO_JAVA_THREAD, -88, "Failed to attach to Java thread")
+_(FAILED_TO_ATTACH_TO_JAVA_THREAD, -88, "Failed to attach to Java thread") \
+_(INVALID_WORKER, -89, "Invalid worker thread")
typedef enum {
#define _(a,b,c) VNET_API_ERROR_##a = (b),
diff --git a/vnet/vnet/buffer.h b/vnet/vnet/buffer.h
index 050642276b5..ea25ad0d286 100644
--- a/vnet/vnet/buffer.h
+++ b/vnet/vnet/buffer.h
@@ -64,6 +64,9 @@
#define LOG2_BUFFER_OUTPUT_FEAT_DONE LOG2_VLIB_BUFFER_FLAG_USER(5)
#define BUFFER_OUTPUT_FEAT_DONE (1 << LOG2_BUFFER_OUTPUT_FEAT_DONE)
+#define LOG2_BUFFER_HANDOFF_NEXT_VALID LOG2_VLIB_BUFFER_FLAG_USER(6)
+#define BUFFER_HANDOFF_NEXT_VALID (1 << LOG2_BUFFER_HANDOFF_NEXT_VALID)
+
#define foreach_buffer_opaque_union_subtype \
_(ethernet) \
_(ip) \
@@ -73,7 +76,7 @@ _(l2) \
_(l2t) \
_(gre) \
_(l2_classify) \
-_(io_handoff) \
+_(handoff) \
_(policer) \
_(output_features) \
_(map) \
@@ -185,7 +188,7 @@ typedef struct {
/* IO - worker thread handoff */
struct {
u32 next_index;
- } io_handoff;
+ } handoff;
/* vnet policer */
struct {
diff --git a/vnet/vnet/devices/dpdk/dpdk.h b/vnet/vnet/devices/dpdk/dpdk.h
index 9032b7a9152..1e7d36846cd 100644
--- a/vnet/vnet/devices/dpdk/dpdk.h
+++ b/vnet/vnet/devices/dpdk/dpdk.h
@@ -495,10 +495,6 @@ void dpdk_set_flowcontrol_callback (vlib_main_t *vm,
u32 dpdk_interface_tx_vector (vlib_main_t * vm, u32 dev_instance);
-vlib_frame_queue_elt_t * vlib_get_handoff_queue_elt (u32 vlib_worker_index);
-
-u32 dpdk_get_handoff_node_index (void);
-
void set_efd_bitmap (u8 *bitmap, u32 value, u32 op);
struct rte_mbuf * dpdk_replicate_packet_mb (vlib_buffer_t * b);
diff --git a/vnet/vnet/devices/dpdk/node.c b/vnet/vnet/devices/dpdk/node.c
index 9a0f9c8fb49..27670f37d98 100644
--- a/vnet/vnet/devices/dpdk/node.c
+++ b/vnet/vnet/devices/dpdk/node.c
@@ -22,6 +22,7 @@
#include <vnet/devices/dpdk/dpdk.h>
#include <vnet/classify/vnet_classify.h>
#include <vnet/mpls-gre/packet.h>
+#include <vnet/handoff.h>
#include "dpdk_priv.h"
@@ -48,240 +49,45 @@
*/
#define VMWARE_LENGTH_BUG_WORKAROUND 0
-typedef struct {
- u32 cached_next_index;
-
- /* convenience variables */
- vlib_main_t * vlib_main;
- vnet_main_t * vnet_main;
-} handoff_dispatch_main_t;
-
-typedef struct {
- u32 buffer_index;
- u32 next_index;
- u32 sw_if_index;
-} handoff_dispatch_trace_t;
-
-/* packet trace format function */
-static u8 * format_handoff_dispatch_trace (u8 * s, va_list * args)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- handoff_dispatch_trace_t * t = va_arg (*args, handoff_dispatch_trace_t *);
-
- s = format (s, "HANDOFF_DISPATCH: sw_if_index %d next_index %d buffer 0x%x",
- t->sw_if_index,
- t->next_index,
- t->buffer_index);
- return s;
-}
-
-handoff_dispatch_main_t handoff_dispatch_main;
-
-vlib_node_registration_t handoff_dispatch_node;
-
-#define foreach_handoff_dispatch_error \
-_(EXAMPLE, "example packets")
-
-typedef enum {
-#define _(sym,str) HANDOFF_DISPATCH_ERROR_##sym,
- foreach_handoff_dispatch_error
-#undef _
- HANDOFF_DISPATCH_N_ERROR,
-} handoff_dispatch_error_t;
-
-static char * handoff_dispatch_error_strings[] = {
-#define _(sym,string) string,
- foreach_handoff_dispatch_error
+static char * dpdk_error_strings[] = {
+#define _(n,s) s,
+ foreach_dpdk_error
#undef _
};
-static inline
-void vlib_put_handoff_queue_elt (vlib_frame_queue_elt_t * hf)
-{
- CLIB_MEMORY_BARRIER();
- hf->valid = 1;
-}
-
-static uword
-handoff_dispatch_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+always_inline int
+dpdk_mbuf_is_ip4(struct rte_mbuf *mb)
{
- u32 n_left_from, * from, * to_next;
- dpdk_rx_next_t next_index;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index,
- to_next, n_left_to_next);
-
- while (n_left_from >= 4 && n_left_to_next >= 2)
- {
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- u32 sw_if_index0, sw_if_index1;
-
- /* Prefetch next iteration. */
- {
- vlib_buffer_t * p2, * p3;
-
- p2 = vlib_get_buffer (vm, from[2]);
- p3 = vlib_get_buffer (vm, from[3]);
-
- vlib_prefetch_buffer_header (p2, LOAD);
- vlib_prefetch_buffer_header (p3, LOAD);
- }
-
- /* speculatively enqueue b0 and b1 to the current next frame */
- to_next[0] = bi0 = from[0];
- to_next[1] = bi1 = from[1];
- from += 2;
- to_next += 2;
- n_left_from -= 2;
- n_left_to_next -= 2;
-
- b0 = vlib_get_buffer (vm, bi0);
- b1 = vlib_get_buffer (vm, bi1);
-
- next0 = vnet_buffer(b0)->io_handoff.next_index;
- next1 = vnet_buffer(b1)->io_handoff.next_index;
-
- if (PREDICT_FALSE(vm->trace_main.trace_active_hint))
- {
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
- handoff_dispatch_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->buffer_index = bi0;
- }
- if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
- {
- vlib_trace_buffer (vm, node, next1, b1, /* follow_chain */ 0);
- handoff_dispatch_trace_t *t =
- vlib_add_trace (vm, node, b1, sizeof (*t));
- sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
- t->sw_if_index = sw_if_index1;
- t->next_index = next1;
- t->buffer_index = bi1;
- }
- }
-
- /* verify speculative enqueues, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, next0, next1);
- }
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- u32 sw_if_index0;
-
- /* speculatively enqueue b0 to the current next frame */
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- next0 = vnet_buffer(b0)->io_handoff.next_index;
-
- if (PREDICT_FALSE(vm->trace_main.trace_active_hint))
- {
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
- {
- vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
- handoff_dispatch_trace_t *t =
- vlib_add_trace (vm, node, b0, sizeof (*t));
- sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
- t->sw_if_index = sw_if_index0;
- t->next_index = next0;
- t->buffer_index = bi0;
- }
- }
-
- /* verify speculative enqueue, maybe switch current next frame */
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
+#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
+ return RTE_ETH_IS_IPV4_HDR(mb->packet_type) != 0;
+#else
+ return (mb_flags & (PKT_RX_IPV4_HDR | PKT_RX_IPV4_HDR_EXT)) != 0;
+#endif
}
-VLIB_REGISTER_NODE (handoff_dispatch_node) = {
- .function = handoff_dispatch_node_fn,
- .name = "handoff-dispatch",
- .vector_size = sizeof (u32),
- .format_trace = format_handoff_dispatch_trace,
- .type = VLIB_NODE_TYPE_INTERNAL,
- .flags = VLIB_NODE_FLAG_IS_HANDOFF,
-
- .n_errors = ARRAY_LEN(handoff_dispatch_error_strings),
- .error_strings = handoff_dispatch_error_strings,
-
- .n_next_nodes = DPDK_RX_N_NEXT,
-
- .next_nodes = {
- [DPDK_RX_NEXT_DROP] = "error-drop",
- [DPDK_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
- [DPDK_RX_NEXT_IP4_INPUT] = "ip4-input",
- [DPDK_RX_NEXT_IP6_INPUT] = "ip6-input",
- [DPDK_RX_NEXT_MPLS_INPUT] = "mpls-gre-input",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (handoff_dispatch_node, handoff_dispatch_node_fn)
-
-clib_error_t *handoff_dispatch_init (vlib_main_t *vm)
+always_inline int
+dpdk_mbuf_is_ip6(struct rte_mbuf *mb)
{
- handoff_dispatch_main_t * mp = &handoff_dispatch_main;
-
- mp->vlib_main = vm;
- mp->vnet_main = &vnet_main;
-
- return 0;
+#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
+ return RTE_ETH_IS_IPV6_HDR(mb->packet_type) != 0;
+#else
+ return (mb_flags & (PKT_RX_IPV6_HDR | PKT_RX_IPV6_HDR_EXT)) != 0;
+#endif
}
-VLIB_INIT_FUNCTION (handoff_dispatch_init);
-
-u32 dpdk_get_handoff_node_index (void)
+always_inline int
+vlib_buffer_is_mpls(vlib_buffer_t * b)
{
- return handoff_dispatch_node.index;
+ ethernet_header_t *h = (ethernet_header_t *) b->data;
+ return (h->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST));
}
-static char * dpdk_error_strings[] = {
-#define _(n,s) s,
- foreach_dpdk_error
-#undef _
-};
-
always_inline void
dpdk_rx_next_and_error_from_mb_flags_x1 (dpdk_device_t *xd, struct rte_mbuf *mb,
vlib_buffer_t *b0,
u8 * next0, u8 * error0)
{
- u8 is0_ip4, is0_ip6, is0_mpls, n0;
+ u8 n0;
uint16_t mb_flags = mb->ol_flags;
if (PREDICT_FALSE(mb_flags & (
@@ -306,37 +112,30 @@ dpdk_rx_next_and_error_from_mb_flags_x1 (dpdk_device_t *xd, struct rte_mbuf *mb,
{
*error0 = DPDK_ERROR_NONE;
if (PREDICT_FALSE(xd->per_interface_next_index != ~0))
- n0 = xd->per_interface_next_index;
+ {
+ n0 = xd->per_interface_next_index;
+ b0->flags |= BUFFER_HANDOFF_NEXT_VALID;
+ if (PREDICT_TRUE (dpdk_mbuf_is_ip4(mb)))
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_IP4_INPUT;
+ else if (PREDICT_TRUE(dpdk_mbuf_is_ip6(mb)))
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_IP6_INPUT;
+ else if (PREDICT_TRUE(vlib_buffer_is_mpls(b0)))
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_MPLS_INPUT;
+ else
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_ETHERNET_INPUT;
+ }
else if (PREDICT_FALSE(xd->vlan_subifs || (mb_flags & PKT_RX_VLAN_PKT)))
n0 = DPDK_RX_NEXT_ETHERNET_INPUT;
else
{
- n0 = DPDK_RX_NEXT_ETHERNET_INPUT;
-#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
- is0_ip4 = RTE_ETH_IS_IPV4_HDR(mb->packet_type) != 0;
-#else
- is0_ip4 = (mb_flags & (PKT_RX_IPV4_HDR | PKT_RX_IPV4_HDR_EXT)) != 0;
-#endif
-
- if (PREDICT_TRUE(is0_ip4))
+ if (PREDICT_TRUE (dpdk_mbuf_is_ip4(mb)))
n0 = DPDK_RX_NEXT_IP4_INPUT;
+ else if (PREDICT_TRUE(dpdk_mbuf_is_ip6(mb)))
+ n0 = DPDK_RX_NEXT_IP6_INPUT;
+ else if (PREDICT_TRUE(vlib_buffer_is_mpls(b0)))
+ n0 = DPDK_RX_NEXT_MPLS_INPUT;
else
- {
-#if RTE_VERSION >= RTE_VERSION_NUM(2, 1, 0, 0)
- is0_ip6 = RTE_ETH_IS_IPV6_HDR(mb->packet_type) != 0;
-#else
- is0_ip6 =
- (mb_flags & (PKT_RX_IPV6_HDR | PKT_RX_IPV6_HDR_EXT)) != 0;
-#endif
- if (PREDICT_TRUE(is0_ip6))
- n0 = DPDK_RX_NEXT_IP6_INPUT;
- else
- {
- ethernet_header_t *h0 = (ethernet_header_t *) b0->data;
- is0_mpls = (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST));
- n0 = is0_mpls ? DPDK_RX_NEXT_MPLS_INPUT : n0;
- }
- }
+ n0 = DPDK_RX_NEXT_ETHERNET_INPUT;
}
}
*next0 = n0;
@@ -908,194 +707,6 @@ void dpdk_set_next_node (dpdk_rx_next_t next, char *name)
}
}
-inline vlib_frame_queue_elt_t *
-vlib_get_handoff_queue_elt (u32 vlib_worker_index)
-{
- vlib_frame_queue_t *fq;
- vlib_frame_queue_elt_t *elt;
- u64 new_tail;
-
- fq = vlib_frame_queues[vlib_worker_index];
- ASSERT (fq);
-
- new_tail = __sync_add_and_fetch (&fq->tail, 1);
-
- /* Wait until a ring slot is available */
- while (new_tail >= fq->head_hint + fq->nelts)
- vlib_worker_thread_barrier_check ();
-
- elt = fq->elts + (new_tail & (fq->nelts-1));
-
- /* this would be very bad... */
- while (elt->valid)
- ;
-
- elt->msg_type = VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME;
- elt->last_n_vectors = elt->n_vectors = 0;
-
- return elt;
-}
-
-static inline vlib_frame_queue_elt_t *
-dpdk_get_handoff_queue_elt (
- u32 vlib_worker_index,
- vlib_frame_queue_elt_t ** handoff_queue_elt_by_worker_index)
-{
- vlib_frame_queue_elt_t *elt;
-
- if (handoff_queue_elt_by_worker_index [vlib_worker_index])
- return handoff_queue_elt_by_worker_index [vlib_worker_index];
-
- elt = vlib_get_handoff_queue_elt (vlib_worker_index);
-
- handoff_queue_elt_by_worker_index [vlib_worker_index] = elt;
-
- return elt;
-}
-
-static inline vlib_frame_queue_t *
-is_vlib_handoff_queue_congested (
- u32 vlib_worker_index,
- u32 queue_hi_thresh,
- vlib_frame_queue_t ** handoff_queue_by_worker_index)
-{
- vlib_frame_queue_t *fq;
-
- fq = handoff_queue_by_worker_index [vlib_worker_index];
- if (fq != (vlib_frame_queue_t *)(~0))
- return fq;
-
- fq = vlib_frame_queues[vlib_worker_index];
- ASSERT (fq);
-
- if (PREDICT_FALSE(fq->tail >= (fq->head_hint + queue_hi_thresh))) {
- /* a valid entry in the array will indicate the queue has reached
- * the specified threshold and is congested
- */
- handoff_queue_by_worker_index [vlib_worker_index] = fq;
- fq->enqueue_full_events++;
- return fq;
- }
-
- return NULL;
-}
-
-static inline u64 ipv4_get_key (ip4_header_t *ip)
-{
- u64 hash_key;
-
- hash_key = *((u64*)(&ip->address_pair)) ^ ip->protocol;
-
- return hash_key;
-}
-
-static inline u64 ipv6_get_key (ip6_header_t *ip)
-{
- u64 hash_key;
-
- hash_key = ip->src_address.as_u64[0] ^
- rotate_left(ip->src_address.as_u64[1],13) ^
- rotate_left(ip->dst_address.as_u64[0],26) ^
- rotate_left(ip->dst_address.as_u64[1],39) ^
- ip->protocol;
-
- return hash_key;
-}
-
-
-#define MPLS_BOTTOM_OF_STACK_BIT_MASK 0x00000100U
-#define MPLS_LABEL_MASK 0xFFFFF000U
-
-static inline u64 mpls_get_key (mpls_unicast_header_t *m)
-{
- u64 hash_key;
- u8 ip_ver;
-
-
- /* find the bottom of the MPLS label stack. */
- if (PREDICT_TRUE(m->label_exp_s_ttl &
- clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK))) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (PREDICT_TRUE(m->label_exp_s_ttl &
- clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK))) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
- goto bottom_lbl_found;
- }
- m++;
-
- if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
- goto bottom_lbl_found;
- }
-
- /* the bottom label was not found - use the last label */
- hash_key = m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_LABEL_MASK);
-
- return hash_key;
-
-
-bottom_lbl_found:
- m++;
- ip_ver = (*((u8 *)m) >> 4);
-
- /* find out if it is IPV4 or IPV6 header */
- if (PREDICT_TRUE(ip_ver == 4)) {
- hash_key = ipv4_get_key((ip4_header_t *)m);
- } else if (PREDICT_TRUE(ip_ver == 6)) {
- hash_key = ipv6_get_key((ip6_header_t *)m);
- } else {
- /* use the bottom label */
- hash_key = (m-1)->label_exp_s_ttl & clib_net_to_host_u32(MPLS_LABEL_MASK);
- }
-
- return hash_key;
-
-}
-
-static inline u64 eth_get_key (ethernet_header_t *h0)
-{
- u64 hash_key;
-
-
- if (PREDICT_TRUE(h0->type) == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) {
- hash_key = ipv4_get_key((ip4_header_t *)(h0+1));
- } else if (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) {
- hash_key = ipv6_get_key((ip6_header_t *)(h0+1));
- } else if (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST)) {
- hash_key = mpls_get_key((mpls_unicast_header_t *)(h0+1));
- } else if ((h0->type == clib_host_to_net_u16(ETHERNET_TYPE_VLAN)) ||
- (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_DOT1AD))) {
- ethernet_vlan_header_t * outer = (ethernet_vlan_header_t *)(h0 + 1);
-
- outer = (outer->type == clib_host_to_net_u16(ETHERNET_TYPE_VLAN)) ?
- outer+1 : outer;
- if (PREDICT_TRUE(outer->type) == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) {
- hash_key = ipv4_get_key((ip4_header_t *)(outer+1));
- } else if (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6)) {
- hash_key = ipv6_get_key((ip6_header_t *)(outer+1));
- } else if (outer->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST)) {
- hash_key = mpls_get_key((mpls_unicast_header_t *)(outer+1));
- } else {
- hash_key = outer->type;
- }
- } else {
- hash_key = 0;
- }
-
- return hash_key;
-}
-
/*
* This function is used when dedicated IO threads feed the worker threads.
*
@@ -1395,7 +1006,7 @@ void dpdk_io_thread (vlib_worker_thread_t * w,
vnet_buffer(b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
- vnet_buffer(b0)->io_handoff.next_index = next0;
+ vnet_buffer(b0)->handoff.next_index = next0;
n_rx_bytes += mb->pkt_len;
/* Process subsequent segments of multi-segment packets */
@@ -1796,7 +1407,7 @@ dpdk_io_input (vlib_main_t * vm,
vnet_buffer(b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
- vnet_buffer(b0)->io_handoff.next_index = next0;
+ vnet_buffer(b0)->handoff.next_index = next0;
n_rx_bytes += mb->pkt_len;
/* Process subsequent segments of multi-segment packets */
diff --git a/vnet/vnet/handoff.c b/vnet/vnet/handoff.c
new file mode 100644
index 00000000000..6cb8d02b431
--- /dev/null
+++ b/vnet/vnet/handoff.c
@@ -0,0 +1,529 @@
+
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <vppinfra/xxhash.h>
+#include <vlib/threads.h>
+#include <vnet/handoff.h>
+
+typedef struct {
+ uword * workers_bitmap;
+ u32 * workers;
+} per_inteface_handoff_data_t;
+
+typedef struct {
+ u32 cached_next_index;
+ u32 num_workers;
+ u32 first_worker_index;
+
+ per_inteface_handoff_data_t * if_data;
+
+ /* convenience variables */
+ vlib_main_t * vlib_main;
+ vnet_main_t * vnet_main;
+} handoff_main_t;
+
+handoff_main_t handoff_main;
+
+typedef struct {
+ u32 sw_if_index;
+ u32 next_worker_index;
+ u32 buffer_index;
+} worker_handoff_trace_t;
+
+/* packet trace format function */
+static u8 * format_worker_handoff_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ worker_handoff_trace_t * t = va_arg (*args, worker_handoff_trace_t *);
+
+ s = format (s, "worker-handoff: sw_if_index %d, next_worker %d, buffer 0x%x",
+ t->sw_if_index, t->next_worker_index, t->buffer_index);
+ return s;
+}
+
+vlib_node_registration_t handoff_node;
+
+static uword
+worker_handoff_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ handoff_main_t * hm = &handoff_main;
+ vlib_thread_main_t * tm = vlib_get_thread_main();
+ u32 n_left_from, * from;
+ static __thread vlib_frame_queue_elt_t ** handoff_queue_elt_by_worker_index;
+ static __thread vlib_frame_queue_t ** congested_handoff_queue_by_worker_index = 0;
+ vlib_frame_queue_elt_t * hf = 0;
+ int i;
+ u32 n_left_to_next_worker = 0, * to_next_worker = 0;
+ u32 next_worker_index = 0;
+ u32 current_worker_index = ~0;
+
+ if (PREDICT_FALSE(handoff_queue_elt_by_worker_index == 0))
+ {
+ vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
+
+ vec_validate_init_empty (congested_handoff_queue_by_worker_index,
+ hm->first_worker_index + hm->num_workers - 1,
+ (vlib_frame_queue_t *)(~0));
+ }
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+
+ while (n_left_from > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 sw_if_index0;
+ u32 hash;
+ u64 hash_key;
+ per_inteface_handoff_data_t * ihd0;
+ u32 index0;
+
+ bi0 = from[0];
+ from += 1;
+ n_left_from -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ ASSERT (hm->if_data);
+ ihd0 = vec_elt_at_index (hm->if_data, sw_if_index0);
+
+ next_worker_index = hm->first_worker_index;
+
+ /*
+ * Force unknown traffic onto worker 0,
+ * and into ethernet-input. $$$$ add more hashes.
+ */
+
+ /* Compute ingress LB hash */
+ hash_key = eth_get_key ((ethernet_header_t *) b0->data);
+ hash = (u32) clib_xxhash (hash_key);
+
+ /* if input node did not specify next index, then packet
+ should go to eternet-input */
+ if (PREDICT_FALSE ((b0->flags & BUFFER_HANDOFF_NEXT_VALID) == 0))
+ vnet_buffer(b0)->handoff.next_index = HANDOFF_DISPATCH_NEXT_ETHERNET_INPUT;
+ else if (vnet_buffer(b0)->handoff.next_index == HANDOFF_DISPATCH_NEXT_IP4_INPUT ||
+ vnet_buffer(b0)->handoff.next_index == HANDOFF_DISPATCH_NEXT_IP6_INPUT ||
+ vnet_buffer(b0)->handoff.next_index == HANDOFF_DISPATCH_NEXT_MPLS_INPUT)
+ vlib_buffer_advance (b0, (sizeof(ethernet_header_t)));
+
+ if (PREDICT_TRUE (is_pow2 (vec_len (ihd0->workers))))
+ index0 = hash & (vec_len (ihd0->workers) - 1);
+ else
+ index0 = hash % vec_len (ihd0->workers);
+
+ next_worker_index += ihd0->workers[index0];
+
+ if (next_worker_index != current_worker_index)
+ {
+ if (hf)
+ hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+
+ hf = dpdk_get_handoff_queue_elt(next_worker_index,
+ handoff_queue_elt_by_worker_index);
+
+ n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
+ to_next_worker = &hf->buffer_index[hf->n_vectors];
+ current_worker_index = next_worker_index;
+ }
+
+ /* enqueue to correct worker thread */
+ to_next_worker[0] = bi0;
+ to_next_worker++;
+ n_left_to_next_worker--;
+
+ if (n_left_to_next_worker == 0)
+ {
+ hf->n_vectors = VLIB_FRAME_SIZE;
+ vlib_put_handoff_queue_elt(hf);
+ current_worker_index = ~0;
+ handoff_queue_elt_by_worker_index[next_worker_index] = 0;
+ hf = 0;
+ }
+
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ worker_handoff_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_worker_index = next_worker_index - hm->first_worker_index;
+ t->buffer_index = bi0;
+ }
+
+ }
+
+ if (hf)
+ hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
+
+ /* Ship frames to the worker nodes */
+ for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
+ {
+ if (handoff_queue_elt_by_worker_index[i])
+ {
+ hf = handoff_queue_elt_by_worker_index[i];
+ /*
+ * It works better to let the handoff node
+ * rate-adapt, always ship the handoff queue element.
+ */
+ if (1 || hf->n_vectors == hf->last_n_vectors)
+ {
+ vlib_put_handoff_queue_elt(hf);
+ handoff_queue_elt_by_worker_index[i] = 0;
+ }
+ else
+ hf->last_n_vectors = hf->n_vectors;
+ }
+ congested_handoff_queue_by_worker_index[i] = (vlib_frame_queue_t *)(~0);
+ }
+ hf = 0;
+ current_worker_index = ~0;
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (worker_handoff_node) = {
+ .function = worker_handoff_node_fn,
+ .name = "worker-handoff",
+ .vector_size = sizeof (u32),
+ .format_trace = format_worker_handoff_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (worker_handoff_node, worker_handoff_node_fn)
+
+int interface_handoff_enable_disable (vlib_main_t * vm, u32 sw_if_index,
+ uword * bitmap, int enable_disable)
+{
+ handoff_main_t * hm = &handoff_main;
+ vnet_sw_interface_t * sw;
+ vnet_main_t * vnm = vnet_get_main();
+ per_inteface_handoff_data_t * d;
+ int i, rv;
+ u32 node_index = enable_disable ? worker_handoff_node.index : ~0;
+
+ if (pool_is_free_index (vnm->interface_main.sw_interfaces,
+ sw_if_index))
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ sw = vnet_get_sw_interface (vnm, sw_if_index);
+ if (sw->type != VNET_SW_INTERFACE_TYPE_HARDWARE)
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ if (clib_bitmap_last_set(bitmap) >= hm->num_workers)
+ return VNET_API_ERROR_INVALID_WORKER;
+
+ vec_validate (hm->if_data, sw_if_index);
+ d = vec_elt_at_index(hm->if_data, sw_if_index);
+
+ vec_free (d->workers);
+ vec_free (d->workers_bitmap);
+
+ if (enable_disable)
+ {
+ d->workers_bitmap = bitmap;
+ clib_bitmap_foreach (i, bitmap,
+ ({
+ vec_add1(d->workers, i);
+ }));
+ }
+
+ rv = vnet_hw_interface_rx_redirect_to_node (vnm, sw_if_index, node_index);
+ return rv;
+}
+
+static clib_error_t *
+set_interface_handoff_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ u32 sw_if_index = ~0;
+ int enable_disable = 1;
+ uword * bitmap = 0;
+
+ int rv = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
+ if (unformat (input, "disable"))
+ enable_disable = 0;
+ else if (unformat (input, "workers %U", unformat_bitmap_list,
+ &bitmap))
+ ;
+ else if (unformat (input, "%U", unformat_vnet_sw_interface,
+ vnet_get_main(), &sw_if_index))
+ ;
+ else
+ break;
+ }
+
+ if (sw_if_index == ~0)
+ return clib_error_return (0, "Please specify an interface...");
+
+ if (bitmap == 0)
+ return clib_error_return (0, "Please specify list of workers...");
+
+ rv = interface_handoff_enable_disable (vm, sw_if_index, bitmap, enable_disable);
+
+ switch(rv) {
+ case 0:
+ break;
+
+ case VNET_API_ERROR_INVALID_SW_IF_INDEX:
+ return clib_error_return (0, "Invalid interface");
+ break;
+
+ case VNET_API_ERROR_INVALID_WORKER:
+ return clib_error_return (0, "Invalid worker(s)");
+ break;
+
+ case VNET_API_ERROR_UNIMPLEMENTED:
+ return clib_error_return (0, "Device driver doesn't support redirection");
+ break;
+
+ default:
+ return clib_error_return (0, "unknown return value %d", rv);
+ }
+ return 0;
+}
+
+VLIB_CLI_COMMAND (set_interface_handoff_command, static) = {
+ .path = "set interface handoff",
+ .short_help =
+ "set interface handoff <interface-name> workers <workers-list>",
+ .function = set_interface_handoff_command_fn,
+};
+
+typedef struct {
+ u32 buffer_index;
+ u32 next_index;
+ u32 sw_if_index;
+} handoff_dispatch_trace_t;
+
+/* packet trace format function */
+static u8 * format_handoff_dispatch_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ handoff_dispatch_trace_t * t = va_arg (*args, handoff_dispatch_trace_t *);
+
+ s = format (s, "handoff-dispatch: sw_if_index %d next_index %d buffer 0x%x",
+ t->sw_if_index,
+ t->next_index,
+ t->buffer_index);
+ return s;
+}
+
+
+vlib_node_registration_t handoff_dispatch_node;
+
+#define foreach_handoff_dispatch_error \
+_(EXAMPLE, "example packets")
+
+typedef enum {
+#define _(sym,str) HANDOFF_DISPATCH_ERROR_##sym,
+ foreach_handoff_dispatch_error
+#undef _
+ HANDOFF_DISPATCH_N_ERROR,
+} handoff_dispatch_error_t;
+
+static char * handoff_dispatch_error_strings[] = {
+#define _(sym,string) string,
+ foreach_handoff_dispatch_error
+#undef _
+};
+
+static uword
+handoff_dispatch_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_left_from, * from, * to_next;
+ handoff_dispatch_next_t next_index;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index,
+ to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+ u32 next0, next1;
+ u32 sw_if_index0, sw_if_index1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ next0 = vnet_buffer(b0)->handoff.next_index;
+ next1 = vnet_buffer(b1)->handoff.next_index;
+
+ if (PREDICT_FALSE(vm->trace_main.trace_active_hint))
+ {
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
+ handoff_dispatch_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->buffer_index = bi0;
+ }
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vlib_trace_buffer (vm, node, next1, b1, /* follow_chain */ 0);
+ handoff_dispatch_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ t->buffer_index = bi1;
+ }
+ }
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 next0;
+ u32 sw_if_index0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ next0 = vnet_buffer(b0)->handoff.next_index;
+
+ if (PREDICT_FALSE(vm->trace_main.trace_active_hint))
+ {
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
+ handoff_dispatch_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ t->buffer_index = bi0;
+ }
+ }
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (handoff_dispatch_node) = {
+ .function = handoff_dispatch_node_fn,
+ .name = "handoff-dispatch",
+ .vector_size = sizeof (u32),
+ .format_trace = format_handoff_dispatch_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .flags = VLIB_NODE_FLAG_IS_HANDOFF,
+
+ .n_errors = ARRAY_LEN(handoff_dispatch_error_strings),
+ .error_strings = handoff_dispatch_error_strings,
+
+ .n_next_nodes = HANDOFF_DISPATCH_N_NEXT,
+
+ .next_nodes = {
+ [HANDOFF_DISPATCH_NEXT_DROP] = "error-drop",
+ [HANDOFF_DISPATCH_NEXT_ETHERNET_INPUT] = "ethernet-input",
+ [HANDOFF_DISPATCH_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
+ [HANDOFF_DISPATCH_NEXT_IP6_INPUT] = "ip6-input",
+ [HANDOFF_DISPATCH_NEXT_MPLS_INPUT] = "mpls-gre-input",
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (handoff_dispatch_node, handoff_dispatch_node_fn)
+
+clib_error_t *handoff_init (vlib_main_t *vm)
+{
+ handoff_main_t * hm = &handoff_main;
+ vlib_thread_main_t * tm = vlib_get_thread_main();
+ uword * p;
+
+ vlib_thread_registration_t * tr;
+ /* Only the standard vnet worker threads are supported */
+ p = hash_get_mem (tm->thread_registrations_by_name, "workers");
+ tr = (vlib_thread_registration_t *) p[0];
+ if (tr)
+ {
+ hm->num_workers = tr->count;
+ hm->first_worker_index = tr->first_index;
+ }
+
+ hm->vlib_main = vm;
+ hm->vnet_main = &vnet_main;
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (handoff_init);
diff --git a/vnet/vnet/handoff.h b/vnet/vnet/handoff.h
new file mode 100644
index 00000000000..e0938ebfb2e
--- /dev/null
+++ b/vnet/vnet/handoff.h
@@ -0,0 +1,228 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_vnet_handoff_h
+#define included_vnet_handoff_h
+
+#include <vlib/vlib.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/mpls-gre/packet.h>
+
+typedef enum {
+ HANDOFF_DISPATCH_NEXT_IP4_INPUT,
+ HANDOFF_DISPATCH_NEXT_IP6_INPUT,
+ HANDOFF_DISPATCH_NEXT_MPLS_INPUT,
+ HANDOFF_DISPATCH_NEXT_ETHERNET_INPUT,
+ HANDOFF_DISPATCH_NEXT_DROP,
+ HANDOFF_DISPATCH_N_NEXT,
+} handoff_dispatch_next_t;
+
+static inline
+void vlib_put_handoff_queue_elt (vlib_frame_queue_elt_t * hf)
+{
+ CLIB_MEMORY_BARRIER();
+ hf->valid = 1;
+}
+
+static inline vlib_frame_queue_elt_t *
+vlib_get_handoff_queue_elt (u32 vlib_worker_index)
+{
+ vlib_frame_queue_t *fq;
+ vlib_frame_queue_elt_t *elt;
+ u64 new_tail;
+
+ fq = vlib_frame_queues[vlib_worker_index];
+ ASSERT (fq);
+
+ new_tail = __sync_add_and_fetch (&fq->tail, 1);
+
+ /* Wait until a ring slot is available */
+ while (new_tail >= fq->head_hint + fq->nelts)
+ vlib_worker_thread_barrier_check ();
+
+ elt = fq->elts + (new_tail & (fq->nelts-1));
+
+ /* this would be very bad... */
+ while (elt->valid)
+ ;
+
+ elt->msg_type = VLIB_FRAME_QUEUE_ELT_DISPATCH_FRAME;
+ elt->last_n_vectors = elt->n_vectors = 0;
+
+ return elt;
+}
+
+static inline vlib_frame_queue_t *
+is_vlib_handoff_queue_congested (
+ u32 vlib_worker_index,
+ u32 queue_hi_thresh,
+ vlib_frame_queue_t ** handoff_queue_by_worker_index)
+{
+ vlib_frame_queue_t *fq;
+
+ fq = handoff_queue_by_worker_index [vlib_worker_index];
+ if (fq != (vlib_frame_queue_t *)(~0))
+ return fq;
+
+ fq = vlib_frame_queues[vlib_worker_index];
+ ASSERT (fq);
+
+ if (PREDICT_FALSE(fq->tail >= (fq->head_hint + queue_hi_thresh))) {
+ /* a valid entry in the array will indicate the queue has reached
+ * the specified threshold and is congested
+ */
+ handoff_queue_by_worker_index [vlib_worker_index] = fq;
+ fq->enqueue_full_events++;
+ return fq;
+ }
+
+ return NULL;
+}
+
+static inline vlib_frame_queue_elt_t *
+dpdk_get_handoff_queue_elt (u32 vlib_worker_index,
+ vlib_frame_queue_elt_t **
+ handoff_queue_elt_by_worker_index)
+{
+ vlib_frame_queue_elt_t *elt;
+
+ if (handoff_queue_elt_by_worker_index [vlib_worker_index])
+ return handoff_queue_elt_by_worker_index [vlib_worker_index];
+
+ elt = vlib_get_handoff_queue_elt (vlib_worker_index);
+
+ handoff_queue_elt_by_worker_index [vlib_worker_index] = elt;
+
+ return elt;
+}
+
+static inline u64 ipv4_get_key (ip4_header_t *ip)
+{
+ u64 hash_key;
+
+ hash_key = *((u64*)(&ip->address_pair)) ^ ip->protocol;
+
+ return hash_key;
+}
+
+static inline u64 ipv6_get_key (ip6_header_t *ip)
+{
+ u64 hash_key;
+
+ hash_key = ip->src_address.as_u64[0] ^
+ rotate_left(ip->src_address.as_u64[1],13) ^
+ rotate_left(ip->dst_address.as_u64[0],26) ^
+ rotate_left(ip->dst_address.as_u64[1],39) ^
+ ip->protocol;
+
+ return hash_key;
+}
+
+#define MPLS_BOTTOM_OF_STACK_BIT_MASK 0x00000100U
+#define MPLS_LABEL_MASK 0xFFFFF000U
+
+static inline u64 mpls_get_key (mpls_unicast_header_t *m)
+{
+ u64 hash_key;
+ u8 ip_ver;
+
+
+ /* find the bottom of the MPLS label stack. */
+ if (PREDICT_TRUE(m->label_exp_s_ttl &
+ clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK))) {
+ goto bottom_lbl_found;
+ }
+ m++;
+
+ if (PREDICT_TRUE(m->label_exp_s_ttl &
+ clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK))) {
+ goto bottom_lbl_found;
+ }
+ m++;
+
+ if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
+ goto bottom_lbl_found;
+ }
+ m++;
+
+ if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
+ goto bottom_lbl_found;
+ }
+ m++;
+
+ if (m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_BOTTOM_OF_STACK_BIT_MASK)) {
+ goto bottom_lbl_found;
+ }
+
+ /* the bottom label was not found - use the last label */
+ hash_key = m->label_exp_s_ttl & clib_net_to_host_u32(MPLS_LABEL_MASK);
+
+ return hash_key;
+
+bottom_lbl_found:
+ m++;
+ ip_ver = (*((u8 *)m) >> 4);
+
+ /* find out if it is IPV4 or IPV6 header */
+ if (PREDICT_TRUE(ip_ver == 4)) {
+ hash_key = ipv4_get_key((ip4_header_t *)m);
+ } else if (PREDICT_TRUE(ip_ver == 6)) {
+ hash_key = ipv6_get_key((ip6_header_t *)m);
+ } else {
+ /* use the bottom label */
+ hash_key = (m-1)->label_exp_s_ttl & clib_net_to_host_u32(MPLS_LABEL_MASK);
+ }
+
+ return hash_key;
+
+}
+
+
+static inline u64
+eth_get_key (ethernet_header_t *h0)
+{
+ u64 hash_key;
+
+ if (PREDICT_TRUE(h0->type) == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) {
+ hash_key = ipv4_get_key((ip4_header_t *)(h0+1));
+ } else if (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_IP6)) {
+ hash_key = ipv6_get_key((ip6_header_t *)(h0+1));
+ } else if (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST)) {
+ hash_key = mpls_get_key((mpls_unicast_header_t *)(h0+1));
+ } else if ((h0->type == clib_host_to_net_u16(ETHERNET_TYPE_VLAN)) ||
+ (h0->type == clib_host_to_net_u16(ETHERNET_TYPE_DOT1AD))) {
+ ethernet_vlan_header_t * outer = (ethernet_vlan_header_t *)(h0 + 1);
+
+ outer = (outer->type == clib_host_to_net_u16(ETHERNET_TYPE_VLAN)) ?
+ outer+1 : outer;
+ if (PREDICT_TRUE(outer->type) == clib_host_to_net_u16(ETHERNET_TYPE_IP4)) {
+ hash_key = ipv4_get_key((ip4_header_t *)(outer+1));
+ } else if (outer->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6)) {
+ hash_key = ipv6_get_key((ip6_header_t *)(outer+1));
+ } else if (outer->type == clib_host_to_net_u16(ETHERNET_TYPE_MPLS_UNICAST)) {
+ hash_key = mpls_get_key((mpls_unicast_header_t *)(outer+1));
+ } else {
+ hash_key = outer->type;
+ }
+ } else {
+ hash_key = 0;
+ }
+
+ return hash_key;
+}
+
+#endif /* included_vnet_handoff_h */