diff options
Diffstat (limited to 'src/plugins/kubeproxy/kp.c')
| -rw-r--r-- | src/plugins/kubeproxy/kp.c | 974 |
1 files changed, 974 insertions, 0 deletions
diff --git a/src/plugins/kubeproxy/kp.c b/src/plugins/kubeproxy/kp.c new file mode 100644 index 00000000000..1a087e82073 --- /dev/null +++ b/src/plugins/kubeproxy/kp.c @@ -0,0 +1,974 @@ +/* + * Copyright (c) 2017 Intel 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 anated to in writing, software + * distributed under the License is distributed on an "POD IS" BPODIS, + * 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 <kubeproxy/kp.h> +#include <vnet/plugin/plugin.h> +#include <vpp/app/version.h> +#include <vnet/api_errno.h> +#include <vnet/udp/udp.h> + +//GC runs at most once every so many seconds +#define KP_GARBAGE_RUN 60 + +//After so many seconds. It is assumed that inter-core race condition will not occur. +#define KP_CONCURRENCY_TIMEOUT 10 + +kp_main_t kp_main; + +#define kp_get_writer_lock() do {} while(__sync_lock_test_and_set (kp_main.writer_lock, 1)) +#define kp_put_writer_lock() kp_main.writer_lock[0] = 0 + +static void kp_pod_stack (kp_pod_t *pod); + +void ip46_prefix_normalize(ip46_address_t *prefix, u8 plen) +{ + if (plen == 0) { + prefix->as_u64[0] = 0; + prefix->as_u64[1] = 0; + } else if (plen <= 64) { + prefix->as_u64[0] &= clib_host_to_net_u64(0xffffffffffffffffL << (64 - plen)); + prefix->as_u64[1] = 0; + } else { + prefix->as_u64[1] &= clib_host_to_net_u64(0xffffffffffffffffL << (128 - plen)); + } + +} + +uword unformat_ip46_prefix (unformat_input_t * input, va_list * args) +{ + ip46_address_t *ip46 = va_arg (*args, ip46_address_t *); + u8 *len = va_arg (*args, u8 *); + ip46_type_t type = va_arg (*args, ip46_type_t); + + u32 l; + if ((type != IP46_TYPE_IP6) && unformat(input, "%U/%u", unformat_ip4_address, &ip46->ip4, &l)) { + if (l > 32) + return 0; + *len = l + 96; + ip46->pad[0] = ip46->pad[1] = ip46->pad[2] = 0; + } else if ((type != IP46_TYPE_IP4) && unformat(input, "%U/%u", unformat_ip6_address, &ip46->ip6, &l)) { + if (l > 128) + return 0; + *len = l; + } else { + return 0; + } + return 1; +} + +u8 *format_ip46_prefix (u8 * s, va_list * args) +{ + ip46_address_t *ip46 = va_arg (*args, ip46_address_t *); + u32 len = va_arg (*args, u32); //va_arg cannot use u8 or u16 + ip46_type_t type = va_arg (*args, ip46_type_t); + + int is_ip4 = 0; + if (type == IP46_TYPE_IP4) + is_ip4 = 1; + else if (type == IP46_TYPE_IP6) + is_ip4 = 0; + else + is_ip4 = (len >= 96) && ip46_address_is_ip4(ip46); + + return is_ip4 ? + format(s, "%U/%d", format_ip4_address, &ip46->ip4, len - 96): + format(s, "%U/%d", format_ip6_address, &ip46->ip6, len); +} + +const static char * const kp_dpo_nat4_ip4[] = { "kp4-nat4" , NULL }; +const static char * const kp_dpo_nat4_ip6[] = { "kp6-nat4" , NULL }; +const static char* const * const kp_dpo_nat4_nodes[DPO_PROTO_NUM] = + { + [DPO_PROTO_IP4] = kp_dpo_nat4_ip4, + [DPO_PROTO_IP6] = kp_dpo_nat4_ip6, + }; + +const static char * const kp_dpo_nat6_ip4[] = { "kp4-nat6" , NULL }; +const static char * const kp_dpo_nat6_ip6[] = { "kp6-nat6" , NULL }; +const static char* const * const kp_dpo_nat6_nodes[DPO_PROTO_NUM] = + { + [DPO_PROTO_IP4] = kp_dpo_nat6_ip4, + [DPO_PROTO_IP6] = kp_dpo_nat6_ip6, + }; + +u32 kp_hash_time_now(vlib_main_t * vm) +{ + return (u32) (vlib_time_now(vm) + 10000); +} + +u8 *format_kp_main (u8 * s, va_list * args) +{ + vlib_thread_main_t *tm = vlib_get_thread_main(); + kp_main_t *kpm = &kp_main; + s = format(s, "kp_main"); + s = format(s, " #vips: %u\n", pool_elts(kpm->vips)); + s = format(s, " #pods: %u\n", pool_elts(kpm->pods) - 1); + + u32 thread_index; + for(thread_index = 0; thread_index < tm->n_vlib_mains; thread_index++ ) { + kp_hash_t *h = kpm->per_cpu[thread_index].sticky_ht; + if (h) { + s = format(s, "core %d\n", thread_index); + s = format(s, " timeout: %ds\n", h->timeout); + s = format(s, " usage: %d / %d\n", kp_hash_elts(h, kp_hash_time_now(vlib_get_main())), kp_hash_size(h)); + } + } + + return s; +} + +static char *kp_vip_type_strings[] = { + [KP_VIP_TYPE_IP4_NAT44] = "ip4-nat44", + [KP_VIP_TYPE_IP4_NAT46] = "ip4-nat46", + [KP_VIP_TYPE_IP6_NAT64] = "ip6-nat64", + [KP_VIP_TYPE_IP6_NAT66] = "ip6-nat66", +}; + +u8 *format_kp_vip_type (u8 * s, va_list * args) +{ + kp_vip_type_t vipt = va_arg (*args, kp_vip_type_t); + u32 i; + for (i=0; i<KP_VIP_N_TYPES; i++) + if (vipt == i) + return format(s, kp_vip_type_strings[i]); + return format(s, "_WRONG_TYPE_"); +} + +uword unformat_kp_vip_type (unformat_input_t * input, va_list * args) +{ + kp_vip_type_t *vipt = va_arg (*args, kp_vip_type_t *); + u32 i; + for (i=0; i<KP_VIP_N_TYPES; i++) + if (unformat(input, kp_vip_type_strings[i])) { + *vipt = i; + return 1; + } + return 0; +} + +u8 *format_kp_vip (u8 * s, va_list * args) +{ + kp_vip_t *vip = va_arg (*args, kp_vip_t *); + return format(s, "%U %U port:%u target_port:%u node_port:%u " + "new_size:%u #pod:%u%s", + format_kp_vip_type, vip->type, + format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY, + ntohs(vip->port), ntohs(vip->target_port), + ntohs(vip->node_port), + vip->new_flow_table_mask + 1, + pool_elts(vip->pod_indexes), + (vip->flags & KP_VIP_FLAGS_USED)?"":" removed"); +} + +u8 *format_kp_pod (u8 * s, va_list * args) +{ + kp_pod_t *pod = va_arg (*args, kp_pod_t *); + return format(s, "%U %s", format_ip46_address, + &pod->address, IP46_TYPE_ANY, + (pod->flags & KP_POD_FLAGS_USED)?"used":"removed"); +} + +u8 *format_kp_vip_detailed (u8 * s, va_list * args) +{ + kp_main_t *kpm = &kp_main; + kp_vip_t *vip = va_arg (*args, kp_vip_t *); + uword indent = format_get_indent (s); + + s = format(s, "%U %U [%u] %U port:%u target_port:%u node_port:%u%s\n" + "%U new_size:%u\n", + format_white_space, indent, + format_kp_vip_type, vip->type, + vip - kpm->vips, format_ip46_prefix, &vip->prefix, vip->plen, IP46_TYPE_ANY, + ntohs(vip->port), ntohs(vip->target_port), + ntohs(vip->node_port), + (vip->flags & KP_VIP_FLAGS_USED)?"":" removed", + format_white_space, indent, + vip->new_flow_table_mask + 1); + + //Print counters + s = format(s, "%U counters:\n", + format_white_space, indent); + u32 i; + for (i=0; i<KP_N_VIP_COUNTERS; i++) + s = format(s, "%U %s: %d\n", + format_white_space, indent, + kpm->vip_counters[i].name, + vlib_get_simple_counter(&kpm->vip_counters[i], vip - kpm->vips)); + + + s = format(s, "%U #pod:%u\n", + format_white_space, indent, + pool_elts(vip->pod_indexes)); + + //Let's count the buckets for each POD + u32 *count = 0; + vec_validate(count, pool_len(kpm->pods)); //Possibly big alloc for not much... + kp_new_flow_entry_t *nfe; + vec_foreach(nfe, vip->new_flow_table) + count[nfe->pod_index]++; + + kp_pod_t *pod; + u32 *pod_index; + pool_foreach(pod_index, vip->pod_indexes, { + pod = &kpm->pods[*pod_index]; + s = format(s, "%U %U %d buckets %d flows dpo:%u %s\n", + format_white_space, indent, + format_ip46_address, &pod->address, IP46_TYPE_ANY, + count[pod - kpm->pods], + vlib_refcount_get(&kpm->pod_refcount, pod - kpm->pods), + pod->dpo.dpoi_index, + (pod->flags & KP_POD_FLAGS_USED)?"used":" removed"); + }); + + vec_free(count); + + /* + s = format(s, "%U new flows table:\n", format_white_space, indent); + kp_new_flow_entry_t *nfe; + vec_foreach(nfe, vip->new_flow_table) { + s = format(s, "%U %d: %d\n", format_white_space, indent, nfe - vip->new_flow_table, nfe->pod_index); + } + */ + return s; +} + +typedef struct { + u32 pod_index; + u32 last; + u32 skip; +} kp_pseudorand_t; + +static int kp_pseudorand_compare(void *a, void *b) +{ + kp_pod_t *poda, *podb; + kp_main_t *kpm = &kp_main; + poda = &kpm->pods[((kp_pseudorand_t *)a)->pod_index]; + podb = &kpm->pods[((kp_pseudorand_t *)b)->pod_index]; + return memcmp(&poda->address, &podb->address, sizeof(podb->address)); +} + +static void kp_vip_garbage_collection(kp_vip_t *vip) +{ + kp_main_t *kpm = &kp_main; + ASSERT (kpm->writer_lock[0]); + + u32 now = (u32) vlib_time_now(vlib_get_main()); + if (!clib_u32_loop_gt(now, vip->last_garbage_collection + KP_GARBAGE_RUN)) + return; + + vip->last_garbage_collection = now; + kp_pod_t *pod; + u32 *pod_index; + pool_foreach(pod_index, vip->pod_indexes, { + pod = &kpm->pods[*pod_index]; + if (!(pod->flags & KP_POD_FLAGS_USED) && //Not used + clib_u32_loop_gt(now, pod->last_used + KP_CONCURRENCY_TIMEOUT) && //Not recently used + (vlib_refcount_get(&kpm->pod_refcount, pod - kpm->pods) == 0)) + { //Not referenced + fib_entry_child_remove(pod->next_hop_fib_entry_index, + pod->next_hop_child_index); + fib_table_entry_delete_index(pod->next_hop_fib_entry_index, + FIB_SOURCE_RR); + pod->next_hop_fib_entry_index = FIB_NODE_INDEX_INVALID; + + pool_put(vip->pod_indexes, pod_index); + pool_put(kpm->pods, pod); + } + }); +} + +void kp_garbage_collection() +{ + kp_main_t *kpm = &kp_main; + kp_get_writer_lock(); + kp_vip_t *vip; + u32 *to_be_removed_vips = 0, *i; + pool_foreach(vip, kpm->vips, { + kp_vip_garbage_collection(vip); + + if (!(vip->flags & KP_VIP_FLAGS_USED) && + (pool_elts(vip->pod_indexes) == 0)) { + vec_add1(to_be_removed_vips, vip - kpm->vips); + } + }); + + vec_foreach(i, to_be_removed_vips) { + vip = &kpm->vips[*i]; + pool_put(kpm->vips, vip); + pool_free(vip->pod_indexes); + } + + vec_free(to_be_removed_vips); + kp_put_writer_lock(); +} + +static void kp_vip_update_new_flow_table(kp_vip_t *vip) +{ + kp_main_t *kpm = &kp_main; + kp_new_flow_entry_t *old_table; + u32 i, *pod_index; + kp_new_flow_entry_t *new_flow_table = 0; + kp_pod_t *pod; + kp_pseudorand_t *pr, *sort_arr = 0; + u32 count; + + ASSERT (kpm->writer_lock[0]); //We must have the lock + + //Check if some POD is configured or not + i = 0; + pool_foreach(pod_index, vip->pod_indexes, { + pod = &kpm->pods[*pod_index]; + if (pod->flags & KP_POD_FLAGS_USED) { //Not used anymore + i = 1; + goto out; //Not sure 'break' works in this macro-loop + } + }); + +out: + if (i == 0) { + //Only the default. i.e. no POD + vec_validate(new_flow_table, vip->new_flow_table_mask); + for (i=0; i<vec_len(new_flow_table); i++) + new_flow_table[i].pod_index = 0; + + goto finished; + } + + //First, let's sort the PODs + sort_arr = 0; + vec_alloc(sort_arr, pool_elts(vip->pod_indexes)); + + i = 0; + pool_foreach(pod_index, vip->pod_indexes, { + pod = &kpm->pods[*pod_index]; + if (!(pod->flags & KP_POD_FLAGS_USED)) //Not used anymore + continue; + + sort_arr[i].pod_index = pod - kpm->pods; + i++; + }); + _vec_len(sort_arr) = i; + + vec_sort_with_function(sort_arr, kp_pseudorand_compare); + + //Now let's pseudo-randomly generate permutations + vec_foreach(pr, sort_arr) { + kp_pod_t *pod = &kpm->pods[pr->pod_index]; + + u64 seed = clib_xxhash(pod->address.as_u64[0] ^ + pod->address.as_u64[1]); + /* We have 2^n buckets. + * skip must be prime with 2^n. + * So skip must be odd. + * MagLev actually state that M should be prime, + * but this has a big computation cost (% operation). + * Using 2^n is more better (& operation). + */ + pr->skip = ((seed & 0xffffffff) | 1) & vip->new_flow_table_mask; + pr->last = (seed >> 32) & vip->new_flow_table_mask; + } + + //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].pod_index = ~0; + + u32 done = 0; + while (1) { + vec_foreach(pr, sort_arr) { + while (1) { + u32 last = pr->last; + pr->last = (pr->last + pr->skip) & vip->new_flow_table_mask; + if (new_flow_table[last].pod_index == ~0) { + new_flow_table[last].pod_index = pr->pod_index; + break; + } + } + done++; + if (done == vec_len(new_flow_table)) + goto finished; + } + } + + vec_free(sort_arr); + +finished: + +//Count number of changed entries + count = 0; + for (i=0; i<vec_len(new_flow_table); i++) + if (vip->new_flow_table == 0 || + new_flow_table[i].pod_index != vip->new_flow_table[i].pod_index) + count++; + + old_table = vip->new_flow_table; + vip->new_flow_table = new_flow_table; + vec_free(old_table); +} + +int kp_conf(u32 per_cpu_sticky_buckets, u32 flow_timeout) +{ + kp_main_t *kpm = &kp_main; + + if (!is_pow2(per_cpu_sticky_buckets)) + return VNET_API_ERROR_INVALID_MEMORY_SIZE; + + kp_get_writer_lock(); //Not exactly necessary but just a reminder that it exists for my future self + kpm->per_cpu_sticky_buckets = per_cpu_sticky_buckets; + kpm->flow_timeout = flow_timeout; + kp_put_writer_lock(); + return 0; +} + +static +int kp_vip_find_index_with_lock(ip46_address_t *prefix, u8 plen, u32 *vip_index) +{ + kp_main_t *kpm = &kp_main; + kp_vip_t *vip; + ASSERT (kpm->writer_lock[0]); //This must be called with the lock owned + ip46_prefix_normalize(prefix, plen); + pool_foreach(vip, kpm->vips, { + if ((vip->flags & KP_POD_FLAGS_USED) && + vip->plen == plen && + vip->prefix.as_u64[0] == prefix->as_u64[0] && + vip->prefix.as_u64[1] == prefix->as_u64[1]) { + *vip_index = vip - kpm->vips; + return 0; + } + }); + return VNET_API_ERROR_NO_SUCH_ENTRY; +} + +int kp_vip_find_index(ip46_address_t *prefix, u8 plen, u32 *vip_index) +{ + int ret; + kp_get_writer_lock(); + ret = kp_vip_find_index_with_lock(prefix, plen, vip_index); + kp_put_writer_lock(); + return ret; +} + +static int kp_pod_find_index_vip(kp_vip_t *vip, ip46_address_t *address, u32 *pod_index) +{ + kp_main_t *kpm = &kp_main; + ASSERT (kpm->writer_lock[0]); //This must be called with the lock owned + kp_pod_t *pod; + u32 *podi; + pool_foreach(podi, vip->pod_indexes, { + pod = &kpm->pods[*podi]; + if (pod->vip_index == (vip - kpm->vips) && + pod->address.as_u64[0] == address->as_u64[0] && + pod->address.as_u64[1] == address->as_u64[1]) { + *pod_index = pod - kpm->pods; + return 0; + } + }); + return -1; +} + +int kp_vip_add_pods(u32 vip_index, ip46_address_t *addresses, u32 n) +{ + kp_main_t *kpm = &kp_main; + kp_get_writer_lock(); + kp_vip_t *vip; + if (!(vip = kp_vip_get_by_index(vip_index))) { + kp_put_writer_lock(); + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + ip46_type_t type = kp_vip_is_nat4(vip)?IP46_TYPE_IP4:IP46_TYPE_IP6; + u32 *to_be_added = 0; + u32 *to_be_updated = 0; + u32 i; + u32 *ip; + kp_snat_mapping_t *m; + kp_snat4_key_t m_key4; + clib_bihash_kv_8_8_t kv; + + //Sanity check + while (n--) { + + if (!kp_pod_find_index_vip(vip, &addresses[n], &i)) { + if (kpm->pods[i].flags & KP_POD_FLAGS_USED) { + vec_free(to_be_added); + vec_free(to_be_updated); + kp_put_writer_lock(); + return VNET_API_ERROR_VALUE_EXIST; + } + vec_add1(to_be_updated, i); + goto next; + } + + if (ip46_address_type(&addresses[n]) != type) { + vec_free(to_be_added); + vec_free(to_be_updated); + kp_put_writer_lock(); + return VNET_API_ERROR_INVALID_ADDRESS_FAMILY; + } + + if (n) { + u32 n2 = n; + while(n2--) //Check for duplicates + if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] && + addresses[n2].as_u64[1] == addresses[n].as_u64[1]) + goto next; + } + + vec_add1(to_be_added, n); + +next: + continue; + } + + //Update reused PODs + vec_foreach(ip, to_be_updated) { + kpm->pods[*ip].flags = KP_POD_FLAGS_USED; + } + vec_free(to_be_updated); + + //Create those who have to be created + vec_foreach(ip, to_be_added) { + kp_pod_t *pod; + u32 *pod_index; + pool_get(kpm->pods, pod); + pod->address = addresses[*ip]; + pod->flags = KP_POD_FLAGS_USED; + pod->vip_index = vip_index; + pool_get(vip->pod_indexes, pod_index); + *pod_index = pod - kpm->pods; + + /* + * become a child of the FIB entry + * so we are informed when its forwarding changes + */ + fib_prefix_t nh = {}; + if (kp_vip_is_nat4(vip)) { + nh.fp_addr.ip4 = pod->address.ip4; + nh.fp_len = 32; + nh.fp_proto = FIB_PROTOCOL_IP4; + } else { + nh.fp_addr.ip6 = pod->address.ip6; + nh.fp_len = 128; + nh.fp_proto = FIB_PROTOCOL_IP6; + } + + pod->next_hop_fib_entry_index = + fib_table_entry_special_add(0, + &nh, + FIB_SOURCE_RR, + FIB_ENTRY_FLAG_NONE); + pod->next_hop_child_index = + fib_entry_child_add(pod->next_hop_fib_entry_index, + kpm->fib_node_type, + pod - kpm->pods); + + kp_pod_stack(pod); + + /* Add SNAT static mapping */ + pool_get (kpm->snat_mappings, m); + memset (m, 0, sizeof (*m)); + if (kp_vip_is_nat4(vip)) { + m_key4.addr = pod->address.ip4; + m_key4.port = vip->target_port; + m_key4.protocol = 0; + m_key4.fib_index = 0; + + m->vip.ip4 = vip->prefix.ip4;; + m->node_ip.ip4.as_u32 = 0; + m->pod_ip.ip4 = pod->address.ip4; + m->vip_is_ipv6 = 0; + m->node_ip_is_ipv6 = 0; + m->pod_ip_is_ipv6 = 0; + m->port = vip->port; + m->node_port = vip->node_port; + m->target_port = vip->target_port; + m->vrf_id = 0; + m->fib_index = 0; + + kv.key = m_key4.as_u64; + kv.value = m - kpm->snat_mappings; + clib_bihash_add_del_8_8(&kpm->mapping_by_pod, &kv, 1); + } else { + /* TBD */ + } + + } + vec_free(to_be_added); + + //Recompute flows + kp_vip_update_new_flow_table(vip); + + //Garbage collection maybe + kp_vip_garbage_collection(vip); + + kp_put_writer_lock(); + return 0; +} + +int kp_vip_del_pods_withlock(u32 vip_index, ip46_address_t *addresses, u32 n) +{ + kp_main_t *kpm = &kp_main; + u32 now = (u32) vlib_time_now(vlib_get_main()); + u32 *ip = 0; + + kp_vip_t *vip; + if (!(vip = kp_vip_get_by_index(vip_index))) { + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + u32 *indexes = NULL; + while (n--) { + u32 i; + if (kp_pod_find_index_vip(vip, &addresses[n], &i)) { + vec_free(indexes); + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + if (n) { //Check for duplicates + u32 n2 = n - 1; + while(n2--) { + if (addresses[n2].as_u64[0] == addresses[n].as_u64[0] && + addresses[n2].as_u64[1] == addresses[n].as_u64[1]) + goto next; + } + } + + vec_add1(indexes, i); +next: + continue; + } + + //Garbage collection maybe + kp_vip_garbage_collection(vip); + + if (indexes != NULL) { + vec_foreach(ip, indexes) { + kpm->pods[*ip].flags &= ~KP_POD_FLAGS_USED; + kpm->pods[*ip].last_used = now; + } + + //Recompute flows + kp_vip_update_new_flow_table(vip); + } + + vec_free(indexes); + return 0; +} + +int kp_vip_del_pods(u32 vip_index, ip46_address_t *addresses, u32 n) +{ + kp_get_writer_lock(); + int ret = kp_vip_del_pods_withlock(vip_index, addresses, n); + kp_put_writer_lock(); + return ret; +} + +/** + * Add the VIP adjacency to the ip4 or ip6 fib + */ +static void kp_vip_add_adjacency(kp_main_t *kpm, kp_vip_t *vip) +{ + dpo_proto_t proto = 0; + dpo_id_t dpo = DPO_INVALID; + fib_prefix_t pfx = {}; + if (kp_vip_is_ip4(vip)) { + pfx.fp_addr.ip4 = vip->prefix.ip4; + pfx.fp_len = vip->plen - 96; + pfx.fp_proto = FIB_PROTOCOL_IP4; + proto = DPO_PROTO_IP4; + } else { + pfx.fp_addr.ip6 = vip->prefix.ip6; + pfx.fp_len = vip->plen; + pfx.fp_proto = FIB_PROTOCOL_IP6; + proto = DPO_PROTO_IP6; + } + dpo_set(&dpo, kp_vip_is_nat4(vip)?kpm->dpo_nat4_type:kpm->dpo_nat6_type, + proto, vip - kpm->vips); + fib_table_entry_special_dpo_add(0, + &pfx, + FIB_SOURCE_PLUGIN_HI, + FIB_ENTRY_FLAG_EXCLUSIVE, + &dpo); + dpo_reset(&dpo); +} + +/** + * Deletes the adjacency podsociated with the VIP + */ +static void kp_vip_del_adjacency(kp_main_t *kpm, kp_vip_t *vip) +{ + fib_prefix_t pfx = {}; + if (kp_vip_is_ip4(vip)) { + pfx.fp_addr.ip4 = vip->prefix.ip4; + pfx.fp_len = vip->plen - 96; + pfx.fp_proto = FIB_PROTOCOL_IP4; + } else { + pfx.fp_addr.ip6 = vip->prefix.ip6; + pfx.fp_len = vip->plen; + pfx.fp_proto = FIB_PROTOCOL_IP6; + } + fib_table_entry_special_remove(0, &pfx, FIB_SOURCE_PLUGIN_HI); +} + +int kp_vip_add(ip46_address_t *prefix, u8 plen, kp_vip_type_t type, + u32 new_length, u32 *vip_index, + u16 port, u16 target_port, u16 node_port) +{ + kp_main_t *kpm = &kp_main; + vlib_main_t *vm = kpm->vlib_main; + kp_vip_t *vip; + u32 key, *key_copy; + uword * entry; + + kp_get_writer_lock(); + ip46_prefix_normalize(prefix, plen); + + if (!kp_vip_find_index_with_lock(prefix, plen, vip_index)) { + kp_put_writer_lock(); + return VNET_API_ERROR_VALUE_EXIST; + } + + if (!is_pow2(new_length)) { + kp_put_writer_lock(); + return VNET_API_ERROR_INVALID_MEMORY_SIZE; + } + + if (ip46_prefix_is_ip4(prefix, plen) && + (type != KP_VIP_TYPE_IP4_NAT44) && + (type != KP_VIP_TYPE_IP4_NAT46)) + return VNET_API_ERROR_INVALID_ADDRESS_FAMILY; + + + //Allocate + pool_get(kpm->vips, vip); + + //Init + vip->prefix = *prefix; + vip->plen = plen; + vip->port = clib_host_to_net_u16(port); + vip->target_port = clib_host_to_net_u16(target_port); + vip->node_port = clib_host_to_net_u16(node_port); + vip->last_garbage_collection = (u32) vlib_time_now(vlib_get_main()); + vip->type = type; + vip->flags = KP_VIP_FLAGS_USED; + vip->pod_indexes = 0; + + //Validate counters + u32 i; + for (i = 0; i < KP_N_VIP_COUNTERS; i++) { + vlib_validate_simple_counter(&kpm->vip_counters[i], vip - kpm->vips); + vlib_zero_simple_counter(&kpm->vip_counters[i], vip - kpm->vips); + } + + //Configure new flow table + vip->new_flow_table_mask = new_length - 1; + vip->new_flow_table = 0; + + //Create a new flow hash table full of the default entry + kp_vip_update_new_flow_table(vip); + + //Create adjacency to direct traffic + kp_vip_add_adjacency(kpm, vip); + + //Create maping from nodeport to vip_index + key = clib_host_to_net_u16(node_port); + entry = hash_get_mem (kpm->nodeport_by_key, &key); + if (entry) + return VNET_API_ERROR_VALUE_EXIST; + + key_copy = clib_mem_alloc (sizeof (*key_copy)); + clib_memcpy (key_copy, &key, sizeof (*key_copy)); + hash_set_mem (kpm->nodeport_by_key, key_copy, vip - kpm->vips); + + /* receive packets destined to NodeIP:NodePort */ + udp_register_dst_port (vm, node_port, kp4_nodeport_node.index, 1); + udp_register_dst_port (vm, node_port, kp6_nodeport_node.index, 0); + + //Return result + *vip_index = vip - kpm->vips; + + kp_put_writer_lock(); + return 0; +} + +int kp_vip_del(u32 vip_index) +{ + kp_main_t *kpm = &kp_main; + kp_vip_t *vip; + kp_get_writer_lock(); + if (!(vip = kp_vip_get_by_index(vip_index))) { + kp_put_writer_lock(); + return VNET_API_ERROR_NO_SUCH_ENTRY; + } + + //FIXME: This operation is actually not working + //We will need to remove state before performing this. + + { + //Remove all PODs + ip46_address_t *pods = 0; + kp_pod_t *pod; + u32 *pod_index; + pool_foreach(pod_index, vip->pod_indexes, { + pod = &kpm->pods[*pod_index]; + vec_add1(pods, pod->address); + }); + if (vec_len(pods)) + kp_vip_del_pods_withlock(vip_index, pods, vec_len(pods)); + vec_free(pods); + } + + //Delete adjacency + kp_vip_del_adjacency(kpm, vip); + + //Set the VIP pod unused + vip->flags &= ~KP_VIP_FLAGS_USED; + + kp_put_writer_lock(); + return 0; +} + +/* *INDENT-OFF* */ +VLIB_PLUGIN_REGISTER () = { + .version = VPP_BUILD_VER, + .description = "kube-proxy data plane", +}; +/* *INDENT-ON* */ + +u8 *format_kp_dpo (u8 * s, va_list * va) +{ + index_t index = va_arg (*va, index_t); + CLIB_UNUSED(u32 indent) = va_arg (*va, u32); + kp_main_t *kpm = &kp_main; + kp_vip_t *vip = pool_elt_at_index (kpm->vips, index); + return format (s, "%U", format_kp_vip, vip); +} + +static void kp_dpo_lock (dpo_id_t *dpo) {} +static void kp_dpo_unlock (dpo_id_t *dpo) {} + +static fib_node_t * +kp_fib_node_get_node (fib_node_index_t index) +{ + kp_main_t *kpm = &kp_main; + kp_pod_t *pod = pool_elt_at_index (kpm->pods, index); + return (&pod->fib_node); +} + +static void +kp_fib_node_last_lock_gone (fib_node_t *node) +{ +} + +static kp_pod_t * +kp_pod_from_fib_node (fib_node_t *node) +{ + return ((kp_pod_t*)(((char*)node) - + STRUCT_OFFSET_OF(kp_pod_t, fib_node))); +} + +static void +kp_pod_stack (kp_pod_t *pod) +{ + kp_main_t *kpm = &kp_main; + kp_vip_t *vip = &kpm->vips[pod->vip_index]; + dpo_stack(kp_vip_is_nat4(vip)?kpm->dpo_nat4_type:kpm->dpo_nat6_type, + kp_vip_is_ip4(vip)?DPO_PROTO_IP4:DPO_PROTO_IP6, + &pod->dpo, + fib_entry_contribute_ip_forwarding( + pod->next_hop_fib_entry_index)); +} + +static fib_node_back_walk_rc_t +kp_fib_node_back_walk_notify (fib_node_t *node, + fib_node_back_walk_ctx_t *ctx) +{ + kp_pod_stack(kp_pod_from_fib_node(node)); + return (FIB_NODE_BACK_WALK_CONTINUE); +} + +int kp_nat4_interface_add_del (u32 sw_if_index, int is_del) +{ + if (is_del) + { + vnet_feature_enable_disable ("ip4-unicast", "kp-nat4-in2out", + sw_if_index, 0, 0, 0); + } + else + { + vnet_feature_enable_disable ("ip4-unicast", "kp-nat4-in2out", + sw_if_index, 1, 0, 0); + } + + return 0; +} + +clib_error_t * +kp_init (vlib_main_t * vm) +{ + vlib_thread_main_t *tm = vlib_get_thread_main (); + kp_main_t *kpm = &kp_main; + kpm->vnet_main = vnet_get_main (); + kpm->vlib_main = vm; + + kp_pod_t *default_pod; + fib_node_vft_t kp_fib_node_vft = { + .fnv_get = kp_fib_node_get_node, + .fnv_last_lock = kp_fib_node_last_lock_gone, + .fnv_back_walk = kp_fib_node_back_walk_notify, + }; + dpo_vft_t kp_vft = { + .dv_lock = kp_dpo_lock, + .dv_unlock = kp_dpo_unlock, + .dv_format = format_kp_dpo, + }; + + kpm->vips = 0; + kpm->per_cpu = 0; + vec_validate(kpm->per_cpu, tm->n_vlib_mains - 1); + kpm->writer_lock = clib_mem_alloc_aligned (CLIB_CACHE_LINE_BYTES, CLIB_CACHE_LINE_BYTES); + kpm->writer_lock[0] = 0; + kpm->per_cpu_sticky_buckets = KP_DEFAULT_PER_CPU_STICKY_BUCKETS; + kpm->flow_timeout = KP_DEFAULT_FLOW_TIMEOUT; + kpm->dpo_nat4_type = dpo_register_new_type(&kp_vft, kp_dpo_nat4_nodes); + kpm->dpo_nat6_type = dpo_register_new_type(&kp_vft, kp_dpo_nat6_nodes); + kpm->fib_node_type = fib_node_register_new_type(&kp_fib_node_vft); + + //Init POD reference counters + vlib_refcount_init(&kpm->pod_refcount); + + //Allocate and init default POD. + kpm->pods = 0; + pool_get(kpm->pods, default_pod); + default_pod->flags = 0; + default_pod->dpo.dpoi_next_node = KP_NEXT_DROP; + default_pod->vip_index = ~0; + default_pod->address.ip6.as_u64[0] = 0xffffffffffffffffL; + default_pod->address.ip6.as_u64[1] = 0xffffffffffffffffL; + + kpm->nodeport_by_key + = hash_create_mem (0, sizeof(u16), sizeof (uword)); + + clib_bihash_init_8_8 (&kpm->mapping_by_pod, + "mapping_by_pod", KP_MAPPING_BUCKETS, + KP_MAPPING_MEMORY_SIZE); + +#define _(a,b,c) kpm->vip_counters[c].name = b; + kp_foreach_vip_counter +#undef _ + return NULL; +} + +VLIB_INIT_FUNCTION (kp_init); |