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Diffstat (limited to 'src/vnet/buffer.h')
| -rw-r--r-- | src/vnet/buffer.h | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/src/vnet/buffer.h b/src/vnet/buffer.h new file mode 100644 index 00000000000..7935027f9ec --- /dev/null +++ b/src/vnet/buffer.h @@ -0,0 +1,381 @@ +/* + * Copyright (c) 2015 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. + */ +/* + * vnet/buffer.h: vnet buffer flags + * + * Copyright (c) 2008 Eliot Dresselhaus + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef included_vnet_buffer_h +#define included_vnet_buffer_h + +#include <vlib/vlib.h> + +/* VLIB buffer flags for ip4/ip6 packets. Set by input interfaces for ip4/ip6 + tcp/udp packets with hardware computed checksums. */ +#define LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED LOG2_VLIB_BUFFER_FLAG_USER(1) +#define LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT LOG2_VLIB_BUFFER_FLAG_USER(2) +#define IP_BUFFER_L4_CHECKSUM_COMPUTED (1 << LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED) +#define IP_BUFFER_L4_CHECKSUM_CORRECT (1 << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT) + +/* VLAN header flags. + * These bits are zeroed in vlib_buffer_init_for_free_list() + * meaning wherever the buffer comes from they have a reasonable + * value (eg, if ip4/ip6 generates the packet.) + */ +#define LOG2_ETH_BUFFER_VLAN_2_DEEP LOG2_VLIB_BUFFER_FLAG_USER(3) +#define LOG2_ETH_BUFFER_VLAN_1_DEEP LOG2_VLIB_BUFFER_FLAG_USER(4) +#define ETH_BUFFER_VLAN_2_DEEP (1 << LOG2_ETH_BUFFER_VLAN_2_DEEP) +#define ETH_BUFFER_VLAN_1_DEEP (1 << LOG2_ETH_BUFFER_VLAN_1_DEEP) +#define ETH_BUFFER_VLAN_BITS (ETH_BUFFER_VLAN_1_DEEP | \ + ETH_BUFFER_VLAN_2_DEEP) + +#define LOG2_VNET_BUFFER_RTE_MBUF_VALID LOG2_VLIB_BUFFER_FLAG_USER(5) +#define VNET_BUFFER_RTE_MBUF_VALID (1 << LOG2_VNET_BUFFER_RTE_MBUF_VALID) + +#define LOG2_BUFFER_HANDOFF_NEXT_VALID LOG2_VLIB_BUFFER_FLAG_USER(6) +#define BUFFER_HANDOFF_NEXT_VALID (1 << LOG2_BUFFER_HANDOFF_NEXT_VALID) + +#define LOG2_VNET_BUFFER_LOCALLY_ORIGINATED LOG2_VLIB_BUFFER_FLAG_USER(7) +#define VNET_BUFFER_LOCALLY_ORIGINATED (1 << LOG2_VNET_BUFFER_LOCALLY_ORIGINATED) + +#define LOG2_VNET_BUFFER_SPAN_CLONE LOG2_VLIB_BUFFER_FLAG_USER(8) +#define VNET_BUFFER_SPAN_CLONE (1 << LOG2_VNET_BUFFER_SPAN_CLONE) + +#define foreach_buffer_opaque_union_subtype \ +_(ethernet) \ +_(ip) \ +_(mcast) \ +_(swt) \ +_(l2) \ +_(l2t) \ +_(gre) \ +_(l2_classify) \ +_(handoff) \ +_(policer) \ +_(ipsec) \ +_(map) \ +_(map_t) \ +_(ip_frag) + +/* + * vnet stack buffer opaque array overlay structure. + * The vnet_buffer_opaque_t *must* be the same size as the + * vlib_buffer_t "opaque" structure member, 32 bytes. + * + * When adding a union type, please add a stanza to + * foreach_buffer_opaque_union_subtype (directly above). + * Code in vnet_interface_init(...) verifies the size + * of the union, and will announce any deviations in an + * impossible-to-miss manner. + */ +typedef struct +{ + u32 sw_if_index[VLIB_N_RX_TX]; + + union + { + /* Ethernet. */ + struct + { + /* Saved value of current header by ethernet-input. */ + i32 start_of_ethernet_header; + } ethernet; + + /* IP4/6 buffer opaque. */ + struct + { + /* Adjacency from destination IP address lookup [VLIB_TX]. + Adjacency from source IP address lookup [VLIB_RX]. + This gets set to ~0 until source lookup is performed. */ + u32 adj_index[VLIB_N_RX_TX]; + + union + { + struct + { + /* Flow hash value for this packet computed from IP src/dst address + protocol and ports. */ + u32 flow_hash; + + /* next protocol */ + u32 save_protocol; + + /* Rewrite length */ + u32 save_rewrite_length; + }; + + /* ICMP */ + struct + { + u8 type; + u8 code; + u32 data; + } icmp; + + /* IP header offset from vlib_buffer.data - saved by ip*_local nodes */ + i32 start_of_ip_header; + }; + + } ip; + + /* + * MPLS: + * data copied from the MPLS header that was popped from the packet + * during the look-up. + */ + struct + { + u8 ttl; + u8 exp; + u8 first; + } mpls; + + /* Multicast replication */ + struct + { + u32 pad[3]; + u32 mcast_group_index; + u32 mcast_current_index; + u32 original_free_list_index; + } mcast; + + /* ip4-in-ip6 softwire termination, only valid there */ + struct + { + u8 swt_disable; + u32 mapping_index; + } swt; + + /* l2 bridging path, only valid there */ + struct + { + u32 feature_bitmap; + u16 bd_index; // bridge-domain index + u8 l2_len; // ethernet header length + u8 shg; // split-horizon group + } l2; + + /* l2tpv3 softwire encap, only valid there */ + struct + { + u32 pad[4]; /* do not overlay w/ ip.adj_index[0,1] */ + u8 next_index; + u32 session_index; + } l2t; + + struct + { + u32 src, dst; + } gre; + + /* L2 classify */ + struct + { + u64 pad; + u32 table_index; + u32 opaque_index; + u64 hash; + } l2_classify; + + /* IO - worker thread handoff */ + struct + { + u32 next_index; + } handoff; + + /* vnet policer */ + struct + { + u32 pad[8 - VLIB_N_RX_TX - 1]; /* to end of opaque */ + u32 index; + } policer; + + /* interface output features */ + struct + { + u32 flags; + u32 sad_index; + } ipsec; + + /* vcgn udp inside input, only valid there */ + struct + { + /* This part forms context of the packet. The structure should be + * exactly same as spp_ctx_t. Also this should be the first + * element of this vcgn_uii structure. + */ + /****** BEGIN spp_ctx_t section ***********************/ + union + { /* Roddick specific */ + u32 roddick_info; + struct _tx_pkt_info + { /* Used by PI to PI communication for TX */ + u32 uidb_index:16; /* uidb_index to transmit */ + u32 packet_type:2; /* 1-IPv4, 2-Ipv6, - 0,3 - Unused */ + u32 ipv4_defrag:1; /* 0 - Normal, 1 - update first + * segment size + * (set by 6rd defrag node) + */ + + u32 dst_ip_port_idx:4; /* Index to dst_ip_port_table */ + u32 from_node:4; + u32 calc_chksum:1; + u32 reserved:4; + } tx; + struct _rx_pkt_info + { /* Used by PD / PI communication */ + u32 uidb_index:16; /* uidb_index received in packet */ + u32 packet_type:2; /* 1-IPv4, 2-Ipv6, - 0,3 - Unused */ + u32 icmp_type:1; /* 0-ICMP query type, 1-ICMP error type */ + u32 protocol_type:2; /* 1-TCP, 2-UDP, 3-ICMP, 0 - Unused */ + u32 ipv4_defrag:1; /* 0 - Normal, 1 - update first + * segment size + * (set by 6rd defrag node) + */ + + u32 direction:1; /* 0-Outside, 1-Inside */ + u32 frag:1; /*IP fragment-1, Otherwise-0 */ + u32 option:1; /* 0-No IP option (v4) present, non-fragHdr + * option hdr present (v6) + */ + u32 df_bit:1; /* IPv4 DF bit copied here */ + u32 reserved1:6; + } rx; + } ru; + /****** END spp_ctx_t section ***********************/ + + union + { + struct + { + u32 ipv4; + u16 port; + u16 vrf; //bit0-13:i/f, bit14-15:protocol + } k; + + u64 key64; + } key; + + u32 bucket; + + u16 ovrf; /* Exit interface */ + u8 frag_pkt; + u8 vcgn_unused1; + } vcgn_uii; + + /* MAP */ + struct + { + u16 mtu; + } map; + + /* MAP-T */ + struct + { + u32 map_domain_index; + struct + { + u32 saddr, daddr; + u16 frag_offset; //Fragmentation header offset + u16 l4_offset; //L4 header overall offset + u8 l4_protocol; //The final protocol number + } v6; //Used by ip6_map_t only + u16 checksum_offset; //L4 checksum overall offset + u16 mtu; //Exit MTU + } map_t; + + /* IP Fragmentation */ + struct + { + u16 header_offset; + u16 mtu; + u8 next_index; + u8 flags; //See ip_frag.h + } ip_frag; + + /* COP - configurable junk filter(s) */ + struct + { + /* Current configuration index. */ + u32 current_config_index; + } cop; + + /* LISP */ + struct + { + /* overlay address family */ + u16 overlay_afi; + } lisp; + + /* Driver rx feature */ + struct + { + u32 saved_next_index; /**< saved by drivers for short-cut */ + u16 buffer_advance; + } device_input_feat; + + u32 unused[6]; + }; +} vnet_buffer_opaque_t; + +/* + * The opaque field of the vlib_buffer_t is intepreted as a + * vnet_buffer_opaque_t. Hence it should be big enough to accommodate one. + */ +STATIC_ASSERT (sizeof (vnet_buffer_opaque_t) <= STRUCT_SIZE_OF (vlib_buffer_t, + opaque), + "VNET buffer meta-data too large for vlib_buffer"); + +#define vnet_buffer(b) ((vnet_buffer_opaque_t *) (b)->opaque) + +/* Full cache line (64 bytes) of additional space */ +typedef struct +{ + union + { + }; +} vnet_buffer_opaque2_t; + + + +#endif /* included_vnet_buffer_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |