#include <vpp/app/version.h>
#include <vnet/api_errno.h>
#include <vnet/udp/udp.h>
+#include <vppinfra/lock.h>
//GC runs at most once every so many seconds
#define LB_GARBAGE_RUN 60
//After so many seconds. It is assumed that inter-core race condition will not occur.
#define LB_CONCURRENCY_TIMEOUT 10
+// FIB source for adding routes
+static fib_source_t lb_fib_src;
+
lb_main_t lb_main;
-#define lb_get_writer_lock() do {} while(clib_atomic_test_and_set (lb_main.writer_lock))
-#define lb_put_writer_lock() clib_atomic_release (lb_main.writer_lock)
+#define lb_get_writer_lock() clib_spinlock_lock (&lb_main.writer_lock)
+#define lb_put_writer_lock() clib_spinlock_unlock (&lb_main.writer_lock)
static void lb_as_stack (lb_as_t *as);
lb_snat6_key_t m_key6;
clib_bihash_kv_24_8_t kv6, value6;
lb_snat_mapping_t *m = 0;
- ASSERT (lbm->writer_lock[0]);
+ CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock);
u32 now = (u32) vlib_time_now(vlib_get_main());
if (!clib_u32_loop_gt(now, vip->last_garbage_collection + LB_GARBAGE_RUN))
lb_as_t *as;
lb_pseudorand_t *pr, *sort_arr = 0;
- ASSERT (lbm->writer_lock[0]); //We must have the lock
+ CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock); // We must have the lock
//Check if some AS is configured or not
i = 0;
//Let's create a new flow table
vec_validate(new_flow_table, vip->new_flow_table_mask);
for (i=0; i<vec_len(new_flow_table); i++)
- new_flow_table[i].as_index = ~0;
+ new_flow_table[i].as_index = 0;
u32 done = 0;
while (1) {
while (1) {
u32 last = pr->last;
pr->last = (pr->last + pr->skip) & vip->new_flow_table_mask;
- if (new_flow_table[last].as_index == ~0) {
+ if (new_flow_table[last].as_index == 0) {
new_flow_table[last].as_index = pr->as_index;
break;
}
{
lb_main_t *lbm = &lb_main;
lb_vip_t *vip;
- ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
+ /* This must be called with the lock owned */
+ CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock);
ip46_prefix_normalize(prefix, plen);
pool_foreach(vip, lbm->vips, {
if ((vip->flags & LB_AS_FLAGS_USED) &&
static int lb_as_find_index_vip(lb_vip_t *vip, ip46_address_t *address, u32 *as_index)
{
lb_main_t *lbm = &lb_main;
- ASSERT (lbm->writer_lock[0]); //This must be called with the lock owned
+ /* This must be called with the lock owned */
+ CLIB_SPINLOCK_ASSERT_LOCKED (&lbm->writer_lock);
lb_as_t *as;
u32 *asi;
pool_foreach(asi, vip->as_indexes, {
vlib_refcount_add(&lbm->as_refcount, thread_index, b->value[i], -1);
vlib_refcount_add(&lbm->as_refcount, thread_index, 0, 1);
b->vip[i] = ~0;
- b->value[i] = ~0;
+ b->value[i] = 0;
}
}
if (vip_index == ~0)
lb_vip_prefix_index_alloc (lb_main_t *lbm)
{
/*
- * Check for dynamically allocaetd instance number.
+ * Check for dynamically allocated instance number.
*/
u32 bit;
if (!lb_vip_port_find_diff_port(&(vip->prefix), vip->plen,
vip->protocol, vip->port, &vip_idx))
{
+ lb_vip_t *exists_vip = lb_vip_get_by_index(vip_idx);
+ *vip_prefix_index = exists_vip ? exists_vip->vip_prefix_index : ~0;
return;
}
dpo_set(&dpo, dpo_type, proto, *vip_prefix_index);
fib_table_entry_special_dpo_add(0,
&pfx,
- FIB_SOURCE_PLUGIN_HI,
+ lb_fib_src,
FIB_ENTRY_FLAG_EXCLUSIVE,
&dpo);
dpo_reset(&dpo);
key.vip_prefix_index = vip->vip_prefix_index;
key.protocol = vip->protocol;
key.port = clib_host_to_net_u16(vip->port);
+ key.rsv = 0;
kv.key = key.as_u64;
- if(clib_bihash_search_8_8(&lbm->vip_index_per_port, &kv, &value) == 0)
- m = pool_elt_at_index (lbm->vips, value.value);
+ if(clib_bihash_search_8_8(&lbm->vip_index_per_port, &kv, &value) != 0)
+ {
+ clib_warning("looking up vip_index_per_port failed.");
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+ }
+ m = pool_elt_at_index (lbm->vips, value.value);
ASSERT (m);
kv.value = m - lbm->vips;
pfx.fp_len = vip->plen;
pfx.fp_proto = FIB_PROTOCOL_IP6;
}
- fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_PLUGIN_HI);
+ fib_table_entry_special_remove(0, &pfx, lb_fib_src);
}
int lb_vip_add(lb_vip_add_args_t args, u32 *vip_index)
{
lb_main_t *lbm = &lb_main;
lb_vip_t *vip;
+ int rv = 0;
/* Does not remove default vip, i.e. vip_index = 0 */
if (vip_index == 0)
- return 0;
+ return VNET_API_ERROR_INVALID_VALUE;
lb_get_writer_lock();
if (!(vip = lb_vip_get_by_index(vip_index))) {
//Delete per-port vip filtering entry
if (vip->port != 0)
{
- lb_vip_del_port_filter(lbm, vip);
+ rv = lb_vip_del_port_filter(lbm, vip);
}
//Set the VIP as unused
vip->flags &= ~LB_VIP_FLAGS_USED;
lb_put_writer_lock();
- return 0;
+ return rv;
}
/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
.version = VPP_BUILD_VER,
- .description = "Load Balancer",
+ .description = "Load Balancer (LB)",
};
/* *INDENT-ON* */
//Allocate and init default VIP.
lbm->vips = 0;
pool_get(lbm->vips, default_vip);
+ default_vip->new_flow_table_mask = 0;
default_vip->prefix.ip6.as_u64[0] = 0xffffffffffffffffL;
default_vip->prefix.ip6.as_u64[1] = 0xffffffffffffffffL;
default_vip->protocol = ~0;
lbm->per_cpu = 0;
vec_validate(lbm->per_cpu, tm->n_vlib_mains - 1);
- lbm->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES);
- lbm->writer_lock[0] = 0;
+ clib_spinlock_init (&lbm->writer_lock);
lbm->per_cpu_sticky_buckets = LB_DEFAULT_PER_CPU_STICKY_BUCKETS;
lbm->flow_timeout = LB_DEFAULT_FLOW_TIMEOUT;
lbm->ip4_src_address.as_u32 = 0xffffffff;
default_as->address.ip6.as_u64[0] = 0xffffffffffffffffL;
default_as->address.ip6.as_u64[1] = 0xffffffffffffffffL;
+ /* Generate a valid flow table for default VIP */
+ default_vip->as_indexes = NULL;
+ lb_get_writer_lock();
+ lb_vip_update_new_flow_table(default_vip);
+ lb_put_writer_lock();
+
lbm->vip_index_by_nodeport
= hash_create_mem (0, sizeof(u16), sizeof (uword));
#define _(a,b,c) lbm->vip_counters[c].name = b;
lb_foreach_vip_counter
#undef _
+
+ lb_fib_src = fib_source_allocate("lb",
+ FIB_SOURCE_PRIORITY_HI,
+ FIB_SOURCE_BH_SIMPLE);
+
return NULL;
}