#define foreach_lb_error \
_(NONE, "no error") \
- _(PROTO_NOT_SUPPORTED, "protocol not supported") \
- _(NO_SERVER, "no configured application server")
+ _(PROTO_NOT_SUPPORTED, "protocol not supported")
typedef enum {
#define _(sym,str) LB_ERROR_##sym,
lb_main_t *lbm = &lb_main;
lb_hash_t *sticky_ht = lbm->per_cpu[cpu_index].sticky_ht;
//Check if size changed
- if (PREDICT_FALSE(sticky_ht && (lbm->per_cpu_sticky_buckets != lb_hash_nbuckets(sticky_ht)))) {
+ if (PREDICT_FALSE(sticky_ht && (lbm->per_cpu_sticky_buckets != lb_hash_nbuckets(sticky_ht))))
+ {
+ //Dereference everything in there
+ lb_hash_bucket_t *b;
+ u32 i;
+ lb_hash_foreach_entry(sticky_ht, b, i) {
+ vlib_refcount_add(&lbm->as_refcount, cpu_index, b->value[i], -1);
+ vlib_refcount_add(&lbm->as_refcount, cpu_index, 0, 1);
+ }
- //Dereference everything in there
- lb_hash_entry_t *e;
- lb_hash_foreach_entry(sticky_ht, e) {
- vlib_refcount_add(&lbm->as_refcount, cpu_index, e->value, -1);
- vlib_refcount_add(&lbm->as_refcount, cpu_index, 0, -1);
+ lb_hash_free(sticky_ht);
+ sticky_ht = NULL;
}
- lb_hash_free(sticky_ht);
- sticky_ht = NULL;
- }
-
//Create if necessary
if (PREDICT_FALSE(sticky_ht == NULL)) {
lbm->per_cpu[cpu_index].sticky_ht = lb_hash_alloc(lbm->per_cpu_sticky_buckets, lbm->flow_timeout);
return sticky_ht;
}
+u64
+lb_node_get_other_ports4(ip4_header_t *ip40)
+{
+ return 0;
+}
+
+u64
+lb_node_get_other_ports6(ip6_header_t *ip60)
+{
+ return 0;
+}
+
+static_always_inline u32
+lb_node_get_hash(vlib_buffer_t *p, u8 is_input_v4)
+{
+ u32 hash;
+ if (is_input_v4)
+ {
+ ip4_header_t *ip40;
+ u64 ports;
+ ip40 = vlib_buffer_get_current (p);
+ if (PREDICT_TRUE (ip40->protocol == IP_PROTOCOL_TCP ||
+ ip40->protocol == IP_PROTOCOL_UDP))
+ ports = ((u64)((udp_header_t *)(ip40 + 1))->src_port << 16) |
+ ((u64)((udp_header_t *)(ip40 + 1))->dst_port);
+ else
+ ports = lb_node_get_other_ports4(ip40);
+
+ hash = lb_hash_hash(*((u64 *)&ip40->address_pair), ports,
+ 0, 0, 0);
+ }
+ else
+ {
+ ip6_header_t *ip60;
+ ip60 = vlib_buffer_get_current (p);
+ u64 ports;
+ if (PREDICT_TRUE (ip60->protocol == IP_PROTOCOL_TCP ||
+ ip60->protocol == IP_PROTOCOL_UDP))
+ ports = ((u64)((udp_header_t *)(ip60 + 1))->src_port << 16) |
+ ((u64)((udp_header_t *)(ip60 + 1))->dst_port);
+ else
+ ports = lb_node_get_other_ports6(ip60);
+
+ hash = lb_hash_hash(ip60->src_address.as_u64[0],
+ ip60->src_address.as_u64[1],
+ ip60->dst_address.as_u64[0],
+ ip60->dst_address.as_u64[1],
+ ports);
+ }
+ return hash;
+}
+
static_always_inline uword
lb_node_fn (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame,
u8 is_encap_v4) //Compile-time parameter stating that is GRE encap is v4 (or v6)
{
lb_main_t *lbm = &lb_main;
- vlib_node_runtime_t *error_node = node;
u32 n_left_from, *from, next_index, *to_next, n_left_to_next;
u32 cpu_index = os_get_cpu_number();
u32 lb_time = lb_hash_time_now(vm);
n_left_from = frame->n_vectors;
next_index = node->cached_next_index;
+ u32 nexthash0 = 0;
+ if (PREDICT_TRUE(n_left_from > 0))
+ nexthash0 = lb_node_get_hash(vlib_get_buffer (vm, from[0]), is_input_v4);
+
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
u32 pi0;
vlib_buffer_t *p0;
lb_vip_t *vip0;
- lb_as_t *as0;
- gre_header_t *gre0;
+ u32 asindex0;
u16 len0;
- u32 value0, available_index0, hash0;
- u64 key0[5];
- lb_error_t error0 = LB_ERROR_NONE;
+ u32 available_index0;
+ u8 counter = 0;
+ u32 hash0 = nexthash0;
if (PREDICT_TRUE(n_left_from > 1))
- {
- vlib_buffer_t *p2;
- p2 = vlib_get_buffer(vm, from[1]);
- vlib_prefetch_buffer_header(p2, STORE);
- /* IPv4 + 8 = 28. possibly plus -40 */
- CLIB_PREFETCH (vlib_buffer_get_current(p2) - 40, 128, STORE);
- }
+ {
+ vlib_buffer_t *p1 = vlib_get_buffer (vm, from[1]);
+ //Compute next hash and prefetch bucket
+ nexthash0 = lb_node_get_hash(p1, is_input_v4);
+ lb_hash_prefetch_bucket(sticky_ht, nexthash0);
+ //Prefetch for encap, next
+ CLIB_PREFETCH (vlib_buffer_get_current(p1) - 64, 64, STORE);
+ }
+
+ if (PREDICT_TRUE(n_left_from > 2))
+ {
+ vlib_buffer_t *p2;
+ p2 = vlib_get_buffer(vm, from[2]);
+ /* prefetch packet header and data */
+ vlib_prefetch_buffer_header(p2, STORE);
+ CLIB_PREFETCH (vlib_buffer_get_current(p2), 64, STORE);
+ }
pi0 = to_next[0] = from[0];
from += 1;
vip0 = pool_elt_at_index (lbm->vips,
vnet_buffer (p0)->ip.adj_index[VLIB_TX]);
- if (is_input_v4) {
- ip4_header_t *ip40;
- ip40 = vlib_buffer_get_current (p0);
- len0 = clib_net_to_host_u16(ip40->length);
- key0[0] = (u64) ip40->src_address.as_u32;
- key0[1] = (u64) ip40->dst_address.as_u32;
- key0[2] = 0;
- key0[3] = 0;
- key0[4] = ((u64)((udp_header_t *)(ip40 + 1))->src_port << 32) |
- ((u64)((udp_header_t *)(ip40 + 1))->dst_port << 16);
-
- hash0 = lb_hash_hash(key0);
- } else {
- ip6_header_t *ip60;
- ip60 = vlib_buffer_get_current (p0);
- len0 = clib_net_to_host_u16(ip60->payload_length) + sizeof(ip6_header_t);
- key0[0] = ip60->src_address.as_u64[0];
- key0[1] = ip60->src_address.as_u64[1];
- key0[2] = ip60->dst_address.as_u64[0];
- key0[3] = ip60->dst_address.as_u64[1];
- key0[4] = ((u64)((udp_header_t *)(ip60 + 1))->src_port << 32) |
- ((u64)((udp_header_t *)(ip60 + 1))->dst_port << 16);
-
- hash0 = lb_hash_hash(key0);
- }
-
- //NOTE: This is an ugly trick to not include the VIP index in the hash calculation
- //but actually use it in the key determination.
- key0[4] |= ((vip0 - lbm->vips));
-
- lb_hash_get(sticky_ht, key0, hash0, lb_time, &available_index0, &value0);
- if (PREDICT_TRUE(value0 != ~0)) {
- //Found an existing entry
- as0 = &lbm->ass[value0];
- } else if (PREDICT_TRUE(available_index0 != ~0)) {
- //There is an available slot for a new flow
- as0 = &lbm->ass[vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index];
- if (PREDICT_FALSE(as0 == lbm->ass)) { //Special first element
- error0 = LB_ERROR_NO_SERVER;
- } else {
- vlib_increment_simple_counter(&lbm->vip_counters[LB_VIP_COUNTER_TRACKED_SESSION],
- cpu_index, vip0 - lbm->vips, 1);
- }
-
- //TODO: There are race conditions with as0 and vip0 manipulation.
- //Configuration may be changed, vectors resized, etc...
-
- //Dereference previously used
- vlib_refcount_add(&lbm->as_refcount, cpu_index, lb_hash_available_value(sticky_ht, available_index0), -1);
- vlib_refcount_add(&lbm->as_refcount, cpu_index, as0 - lbm->ass, 1);
-
- //Add sticky entry
- //Note that when there is no AS configured, an entry is configured anyway.
- //But no configured AS is not something that should happen
- lb_hash_put(sticky_ht, key0, as0 - lbm->ass, available_index0, lb_time);
- } else {
- //Could not store new entry in the table
- as0 = &lbm->ass[vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index];
- vlib_increment_simple_counter(&lbm->vip_counters[LB_VIP_COUNTER_UNTRACKED_PACKET],
- cpu_index, vip0 - lbm->vips, 1);
- }
+ if (is_input_v4)
+ {
+ ip4_header_t *ip40;
+ ip40 = vlib_buffer_get_current (p0);
+ len0 = clib_net_to_host_u16(ip40->length);
+ }
+ else
+ {
+ ip6_header_t *ip60;
+ ip60 = vlib_buffer_get_current (p0);
+ len0 = clib_net_to_host_u16(ip60->payload_length) + sizeof(ip6_header_t);
+ }
+
+ lb_hash_get(sticky_ht, hash0, vnet_buffer (p0)->ip.adj_index[VLIB_TX],
+ lb_time, &available_index0, &asindex0);
+
+ if (PREDICT_TRUE(asindex0 != ~0))
+ {
+ //Found an existing entry
+ counter = LB_VIP_COUNTER_NEXT_PACKET;
+ }
+ else if (PREDICT_TRUE(available_index0 != ~0))
+ {
+ //There is an available slot for a new flow
+ asindex0 = vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
+ counter = LB_VIP_COUNTER_FIRST_PACKET;
+ counter = (asindex0 == 0)?LB_VIP_COUNTER_NO_SERVER:counter;
+
+ //TODO: There are race conditions with as0 and vip0 manipulation.
+ //Configuration may be changed, vectors resized, etc...
+
+ //Dereference previously used
+ vlib_refcount_add(&lbm->as_refcount, cpu_index,
+ lb_hash_available_value(sticky_ht, hash0, available_index0), -1);
+ vlib_refcount_add(&lbm->as_refcount, cpu_index,
+ asindex0, 1);
+
+ //Add sticky entry
+ //Note that when there is no AS configured, an entry is configured anyway.
+ //But no configured AS is not something that should happen
+ lb_hash_put(sticky_ht, hash0, asindex0,
+ vnet_buffer (p0)->ip.adj_index[VLIB_TX],
+ available_index0, lb_time);
+ }
+ else
+ {
+ //Could not store new entry in the table
+ asindex0 = vip0->new_flow_table[hash0 & vip0->new_flow_table_mask].as_index;
+ counter = LB_VIP_COUNTER_UNTRACKED_PACKET;
+ }
+
+ vlib_increment_simple_counter(&lbm->vip_counters[counter],
+ cpu_index,
+ vnet_buffer (p0)->ip.adj_index[VLIB_TX],
+ 1);
//Now let's encap
- if (is_encap_v4) {
- ip4_header_t *ip40;
- vlib_buffer_advance(p0, - sizeof(ip4_header_t) - sizeof(gre_header_t));
- ip40 = vlib_buffer_get_current(p0);
- gre0 = (gre_header_t *)(ip40 + 1);
- ip40->src_address = lbm->ip4_src_address;
- ip40->dst_address = as0->address.ip4;
- ip40->ip_version_and_header_length = 0x45;
- ip40->ttl = 128;
- ip40->length = clib_host_to_net_u16(len0 + sizeof(gre_header_t) + sizeof(ip4_header_t));
- ip40->protocol = IP_PROTOCOL_GRE;
- ip40->checksum = ip4_header_checksum (ip40);
- } else {
- ip6_header_t *ip60;
- vlib_buffer_advance(p0, - sizeof(ip6_header_t) - sizeof(gre_header_t));
- ip60 = vlib_buffer_get_current(p0);
- gre0 = (gre_header_t *)(ip60 + 1);
- ip60->dst_address = as0->address.ip6;
- ip60->src_address = lbm->ip6_src_address;
- ip60->hop_limit = 128;
- ip60->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6<<28);
- ip60->payload_length = clib_host_to_net_u16(len0 + sizeof(gre_header_t));
- ip60->protocol = IP_PROTOCOL_GRE;
- }
-
- gre0->flags_and_version = 0;
- gre0->protocol = (is_input_v4)?
- clib_host_to_net_u16(0x0800):
- clib_host_to_net_u16(0x86DD);
-
- vnet_buffer (p0)->ip.adj_index[VLIB_TX] = as0->dpo.dpoi_index;
-
- if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
{
- lb_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
- tr->as_index = as0 - lbm->ass;
- tr->vip_index = vip0 - lbm->vips;
+ gre_header_t *gre0;
+ if (is_encap_v4)
+ {
+ ip4_header_t *ip40;
+ vlib_buffer_advance(p0, - sizeof(ip4_header_t) - sizeof(gre_header_t));
+ ip40 = vlib_buffer_get_current(p0);
+ gre0 = (gre_header_t *)(ip40 + 1);
+ ip40->src_address = lbm->ip4_src_address;
+ ip40->dst_address = lbm->ass[asindex0].address.ip4;
+ ip40->ip_version_and_header_length = 0x45;
+ ip40->ttl = 128;
+ ip40->length = clib_host_to_net_u16(len0 + sizeof(gre_header_t) + sizeof(ip4_header_t));
+ ip40->protocol = IP_PROTOCOL_GRE;
+ ip40->checksum = ip4_header_checksum (ip40);
+ }
+ else
+ {
+ ip6_header_t *ip60;
+ vlib_buffer_advance(p0, - sizeof(ip6_header_t) - sizeof(gre_header_t));
+ ip60 = vlib_buffer_get_current(p0);
+ gre0 = (gre_header_t *)(ip60 + 1);
+ ip60->dst_address = lbm->ass[asindex0].address.ip6;
+ ip60->src_address = lbm->ip6_src_address;
+ ip60->hop_limit = 128;
+ ip60->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6<<28);
+ ip60->payload_length = clib_host_to_net_u16(len0 + sizeof(gre_header_t));
+ ip60->protocol = IP_PROTOCOL_GRE;
+ }
+
+ gre0->flags_and_version = 0;
+ gre0->protocol = (is_input_v4)?
+ clib_host_to_net_u16(0x0800):
+ clib_host_to_net_u16(0x86DD);
}
- p0->error = error_node->errors[error0];
+ if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ lb_trace_t *tr = vlib_add_trace (vm, node, p0, sizeof (*tr));
+ tr->as_index = asindex0;
+ tr->vip_index = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
+ }
+
+ //Enqueue to next
+ //Note that this is going to error if asindex0 == 0
+ vnet_buffer (p0)->ip.adj_index[VLIB_TX] = lbm->ass[asindex0].dpo.dpoi_index;
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, pi0,
- as0->dpo.dpoi_next_node);
+ n_left_to_next, pi0,
+ lbm->ass[asindex0].dpo.dpoi_next_node);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
Code Review / vpp.git / blobdiff