diff options
Diffstat (limited to 'vnet')
| -rw-r--r-- | vnet/vnet/ip/ip4.h | 10 | ||||
| -rw-r--r-- | vnet/vnet/ip/ip4_forward.c | 10 | ||||
| -rw-r--r-- | vnet/vnet/vxlan/decap.c | 410 | ||||
| -rw-r--r-- | vnet/vnet/vxlan/vxlan.c | 18 | ||||
| -rw-r--r-- | vnet/vnet/vxlan/vxlan.h | 5 |
5 files changed, 447 insertions, 6 deletions
diff --git a/vnet/vnet/ip/ip4.h b/vnet/vnet/ip/ip4.h index 62bb5f85..f69f25f5 100644 --- a/vnet/vnet/ip/ip4.h +++ b/vnet/vnet/ip/ip4.h @@ -293,4 +293,14 @@ ip4_compute_flow_hash (const ip4_header_t * ip, return c; } +void +ip4_forward_next_trace (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + vlib_rx_or_tx_t which_adj_index); + +u8 * format_ip4_forward_next_trace (u8 * s, va_list * args); + +u32 ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0); + #endif /* included_ip_ip4_h */ diff --git a/vnet/vnet/ip/ip4_forward.c b/vnet/vnet/ip/ip4_forward.c index fa8ec4e6..d6fd3808 100644 --- a/vnet/vnet/ip/ip4_forward.c +++ b/vnet/vnet/ip/ip4_forward.c @@ -973,6 +973,12 @@ VNET_FEATURE_INIT (ip4_ipsec, static) = { VNET_FEATURE_INIT (ip4_vpath, static) = { .arc_name = "ip4-unicast", .node_name = "vpath-input-ip4", + .runs_before = VNET_FEATURES ("ip4-vxlan-bypass"), +}; + +VNET_FEATURE_INIT (ip4_vxlan_bypass, static) = { + .arc_name = "ip4-unicast", + .node_name = "ip4-vxlan-bypass", .runs_before = VNET_FEATURES ("ip4-lookup"), }; @@ -1143,7 +1149,7 @@ typedef struct { u8 packet_data[64 - 1*sizeof(u32)]; } ip4_forward_next_trace_t; -static u8 * format_ip4_forward_next_trace (u8 * s, va_list * args) +u8 * format_ip4_forward_next_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 *); @@ -1389,7 +1395,7 @@ ip4_tcp_udp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, return sum16; } -static u32 +u32 ip4_tcp_udp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0) { ip4_header_t * ip0 = vlib_buffer_get_current (p0); diff --git a/vnet/vnet/vxlan/decap.c b/vnet/vnet/vxlan/decap.c index 812a8416..05565504 100644 --- a/vnet/vnet/vxlan/decap.c +++ b/vnet/vnet/vxlan/decap.c @@ -52,7 +52,7 @@ always_inline uword vxlan_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame, - char is_ip4) + u32 is_ip4) { u32 n_left_from, next_index, * from, * to_next; vxlan_main_t * vxm = &vxlan_main; @@ -601,3 +601,411 @@ VLIB_REGISTER_NODE (vxlan6_input_node) = { VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_input_node, vxlan6_input) + +typedef enum { + IP_VXLAN_BYPASS_NEXT_DROP, + IP_VXLAN_BYPASS_NEXT_VXLAN, + IP_VXLAN_BYPASS_N_NEXT, +} ip_vxan_bypass_next_t; + +always_inline uword +ip_vxlan_bypass_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + u32 is_ip4) +{ + vxlan_main_t * vxm = &vxlan_main; + u32 * from, * to_next, n_left_from, n_left_to_next, next_index; + vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip4_input_node.index); + ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */ + ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */ + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next_index = node->cached_next_index; + + if (node->flags & VLIB_NODE_FLAG_TRACE) + ip4_forward_next_trace (vm, node, frame, VLIB_TX); + + if (is_ip4) addr4.data_u32 = ~0; + else ip6_address_set_zero (&addr6); + + while (n_left_from > 0) + { + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while (n_left_from >= 4 && n_left_to_next >= 2) + { + vlib_buffer_t * b0, * b1; + ip4_header_t * ip0, * ip1; + udp_header_t * udp0, * udp1; + u32 bi0, ip_len0, udp_len0, flags0, next0; + u32 bi1, ip_len1, udp_len1, flags1, next1; + i32 len_diff0, len_diff1; + u8 error0, good_udp0, proto0; + u8 error1, good_udp1, proto1; + + /* 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); + + CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD); + } + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + from += 2; + n_left_from -= 2; + to_next += 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + ip0 = vlib_buffer_get_current (b0); + ip1 = vlib_buffer_get_current (b1); + + /* Setup packet for next IP feature */ + vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0); + vnet_feature_next(vnet_buffer(b1)->sw_if_index[VLIB_RX], &next1, b1); + + /* Treat IP frag packets as "experimental" protocol for now + until support of IP frag reassembly is implemented */ + proto0 = ip4_is_fragment(ip0) ? 0xfe : ip0->protocol; + proto1 = ip4_is_fragment(ip1) ? 0xfe : ip1->protocol; + + /* Process packet 0 */ + if (proto0 != IP_PROTOCOL_UDP) + goto exit0; /* not UDP packet */ + + udp0 = ip4_next_header (ip0); + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan)) + goto exit0; /* not VXLAN packet */ + + if (is_ip4) + { + if (addr4.as_u32 != ip0->dst_address.as_u32) + { + if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32)) + goto exit0; /* no local VTEP for VXLAN packet */ + addr4 = ip0->dst_address; + } + } + else goto exit0; /* IP6 VXLAN bypass not yet supported */ + + /* vxlan-input node expect current at VXLAN header */ + vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t)); + + flags0 = b0->flags; + good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + ip_len0 = clib_net_to_host_u16 (ip0->length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + good_udp0 = + (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + } + + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + + next0 = error0 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b0->error = error0 ? error_node->errors[error0] : 0; + + exit0: + /* Process packet 1 */ + if (proto1 != IP_PROTOCOL_UDP) + goto exit1; /* not UDP packet */ + + udp1 = ip4_next_header (ip1); + if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan)) + goto exit1; /* not VXLAN packet */ + + if (is_ip4) + { + if (addr4.as_u32 != ip1->dst_address.as_u32) + { + if (!hash_get (vxm->vtep4, ip1->dst_address.as_u32)) + goto exit1; /* no local VTEP for VXLAN packet */ + addr4 = ip1->dst_address; + } + } + else goto exit1; /* IP6 VXLAN bypass not yet supported */ + + /* vxlan-input node expect current at VXLAN header */ + vlib_buffer_advance (b1, sizeof(ip4_header_t)+sizeof(udp_header_t)); + + flags1 = b1->flags; + good_udp1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp1 |= udp1->checksum == 0; + + /* Verify UDP length */ + ip_len1 = clib_net_to_host_u16 (ip1->length); + udp_len1 = clib_net_to_host_u16 (udp1->length); + + len_diff1 = ip_len1 - udp_len1; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp1)) + { + if (!(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED)) + flags1 = ip4_tcp_udp_validate_checksum (vm, b1); + good_udp1 = + (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + } + + error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH; + + next1 = error1 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b1->error = error1 ? error_node->errors[error1] : 0; + + exit1: + 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) + { + vlib_buffer_t * b0; + ip4_header_t * ip0; + udp_header_t * udp0; + u32 bi0, ip_len0, udp_len0, flags0, next0; + i32 len_diff0; + u8 error0, good_udp0, proto0; + + bi0 = to_next[0] = from[0]; + from += 1; + n_left_from -= 1; + to_next += 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + ip0 = vlib_buffer_get_current (b0); + + /* Setup packet for next IP feature */ + vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0); + + /* Treat IP frag packets as "experimental" protocol for now + until support of IP frag reassembly is implemented */ + proto0 = ip4_is_fragment(ip0) ? 0xfe : ip0->protocol; + + if (proto0 != IP_PROTOCOL_UDP) + goto exit; /* not UDP packet */ + + udp0 = ip4_next_header (ip0); + if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan)) + goto exit; /* not VXLAN packet */ + + if (is_ip4) + { + if (addr4.as_u32 != ip0->dst_address.as_u32) + { + if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32)) + goto exit; /* no local VTEP for VXLAN packet */ + addr4 = ip0->dst_address; + } + } + else goto exit; /* IP6 VXLAN bypass not yet supported */ + + /* vxlan-input node expect current at VXLAN header */ + vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t)); + + flags0 = b0->flags; + good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + + /* Don't verify UDP checksum for packets with explicit zero checksum. */ + good_udp0 |= udp0->checksum == 0; + + /* Verify UDP length */ + ip_len0 = clib_net_to_host_u16 (ip0->length); + udp_len0 = clib_net_to_host_u16 (udp0->length); + + len_diff0 = ip_len0 - udp_len0; + + /* Verify UDP checksum */ + if (PREDICT_FALSE (!good_udp0)) + { + if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED)) + flags0 = ip4_tcp_udp_validate_checksum (vm, b0); + good_udp0 = + (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0; + } + + error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM; + error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH; + + next0 = error0 ? + IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN; + b0->error = error0 ? error_node->errors[error0] : 0; + + exit: + 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; +} + +static uword +ip4_vxlan_bypass (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 1); +} + +VLIB_REGISTER_NODE (ip4_vxlan_bypass_node) = { + .function = ip4_vxlan_bypass, + .name = "ip4-vxlan-bypass", + .vector_size = sizeof (u32), + + .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT, + .next_nodes = { + [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop", + [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-input", + }, + + .format_buffer = format_ip4_header, + .format_trace = format_ip4_forward_next_trace, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_bypass_node,ip4_vxlan_bypass) + + +static clib_error_t * +set_ip_vxlan_bypass (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + unformat_input_t _line_input, * line_input = &_line_input; + vnet_main_t * vnm = vnet_get_main(); + clib_error_t * error = 0; + u32 sw_if_index, is_del; + + sw_if_index = ~0; + is_del = 0; + + if (! unformat_user (input, unformat_line_input, line_input)) + return 0; + + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index)) + ; + else if (unformat (line_input, "del")) + is_del = 1; + else + { + error = unformat_parse_error (line_input); + goto done; + } + } + + if (~0 == sw_if_index) + { + error = clib_error_return (0, "unknown interface `%U'", + format_unformat_error, line_input); + goto done; + } + + vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass", sw_if_index, + is_del == 0, 0, 0); + done: + return error; +} + +/*? + * This command adds the 'ip4-vxlan-bypass' graph node for a given interface. + * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks + * for and validate input vxlan packet and bypass ip4-lookup, ip4-local, + * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will + * cause extra overhead to for non-vxlan packets which is kept at a minimum. + * + * @cliexpar + * @parblock + * Example of graph node before ip4-vxlan-bypass is enabled: + * @cliexstart{show vlib graph ip4-vxlan-bypass} + * Name Next Previous + * ip4-vxlan-bypass error-drop [0] + * vxlan4-input [1] + * ip4-lookup [2] + * @cliexend + * + * Example of how to enable ip4-vxlan-bypass on an interface: + * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0} + * + * Example of graph node after ip4-vxlan-bypass is enabled: + * @cliexstart{show vlib graph ip4-vxlan-bypass} + * Name Next Previous + * ip4-vxlan-bypass error-drop [0] ip4-input + * vxlan4-input [1] ip4-input-no-checksum + * ip4-lookup [2] + * @cliexend + * + * Example of how to display the feature enabed on an interface: + * @cliexstart{show ip interface features GigabitEthernet2/0/0} + * IP feature paths configured on GigabitEthernet2/0/0... + * + * ipv4 unicast: + * ip4-vxlan-bypass + * ip4-lookup + * + * ipv4 multicast: + * ip4-lookup-multicast + * + * ipv4 multicast: + * interface-output + * + * ipv6 unicast: + * ip6-lookup + * + * ipv6 multicast: + * ip6-lookup + * + * ipv6 multicast: + * interface-output + * @cliexend + * + * Example of how to disable unicast source checking on an interface: + * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del} + * @endparblock +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = { + .path = "set interface ip vxlan-bypass", + .function = set_ip_vxlan_bypass, + .short_help = "set interface ip vxlan-bypass <interface> [del]", +}; + +/* Dummy init function to get us linked in. */ +clib_error_t * ip4_vxlan_bypass_init (vlib_main_t * vm) +{ return 0; } + +VLIB_INIT_FUNCTION (ip4_vxlan_bypass_init); diff --git a/vnet/vnet/vxlan/vxlan.c b/vnet/vnet/vxlan/vxlan.c index 3c6d7bd9..bda0bbc9 100644 --- a/vnet/vnet/vxlan/vxlan.c +++ b/vnet/vnet/vxlan/vxlan.c @@ -252,7 +252,7 @@ int vnet_vxlan_add_del_tunnel vxlan_tunnel_t *t = 0; vnet_main_t * vnm = vxm->vnet_main; vnet_hw_interface_t * hi; - uword * p; + uword * p, * pvtep; u32 hw_if_index = ~0; u32 sw_if_index = ~0; int rv; @@ -265,12 +265,14 @@ int vnet_vxlan_add_del_tunnel key4.vni = clib_host_to_net_u32 (a->vni << 8); p = hash_get (vxm->vxlan4_tunnel_by_key, key4.as_u64); + pvtep = hash_get (vxm->vtep4, a->src.ip4.as_u32); } else { key6.src.as_u64[0] = a->dst.ip6.as_u64[0]; key6.src.as_u64[1] = a->dst.ip6.as_u64[1]; key6.vni = clib_host_to_net_u32 (a->vni << 8); p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6); + pvtep = NULL; /* ip6 vxlan-bypass not yet implemented */ } if (a->is_add) @@ -313,7 +315,11 @@ int vnet_vxlan_add_del_tunnel } if (!is_ip6) - hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); + { + hash_set (vxm->vxlan4_tunnel_by_key, key4.as_u64, t - vxm->tunnels); + if (pvtep) pvtep[0]++; + else hash_set (vxm->vtep4, a->src.ip4.as_u32, 1); + } else hash_set_mem (vxm->vxlan6_tunnel_by_key, t->key6, t - vxm->tunnels); @@ -417,7 +423,7 @@ int vnet_vxlan_add_del_tunnel else { /* deleting a tunnel: tunnel must exist */ - if (!p) + if (!p) return VNET_API_ERROR_NO_SUCH_ENTRY; t = pool_elt_at_index (vxm->tunnels, p[0]); @@ -444,6 +450,12 @@ int vnet_vxlan_add_del_tunnel if (!is_ip6) { hash_unset (vxm->vxlan4_tunnel_by_key, key4.as_u64); + if (pvtep) + { + pvtep[0]--; + if (pvtep[0] == 0) + hash_unset (vxm->vtep4, a->src.ip4.as_u32); + } } else { diff --git a/vnet/vnet/vxlan/vxlan.h b/vnet/vnet/vxlan/vxlan.h index 28ce2a93..3041df27 100644 --- a/vnet/vnet/vxlan/vxlan.h +++ b/vnet/vnet/vxlan/vxlan.h @@ -141,6 +141,11 @@ typedef struct { uword * vxlan4_tunnel_by_key; /* keyed on ipv4.dst + vni */ uword * vxlan6_tunnel_by_key; /* keyed on ipv6.dst + vni */ + /* local VTEP IPs used by vxlan-bypass node to check if received + VXLAN packet DIP matches any local VTEP address */ + uword * vtep4; /* local ip4 VTEPs keyed on their ip4 addr */ + uword * vtep6; /* local ip6 VTEPs keyed on their ip6 addr */ + /* Free vlib hw_if_indices */ u32 * free_vxlan_tunnel_hw_if_indices; |