X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fflow.h;h=7ee9a2687d1f066ad81fde0141323c3fb166030e;hb=e0edde6fee279cdbbf3c179f5f50adaf0c7c7f1e;hp=03ad32c50b915bcbc177350c8732a13244f3643b;hpb=dd2cb550e56ddc937b917e29a5ccdb920787c7ef;p=sliver-openvswitch.git diff --git a/lib/flow.h b/lib/flow.h index 03ad32c50..7ee9a2687 100644 --- a/lib/flow.h +++ b/lib/flow.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2008, 2009, 2010 Nicira Networks. + * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -24,23 +24,45 @@ #include "openflow/nicira-ext.h" #include "openflow/openflow.h" #include "hash.h" -#include "openvswitch/datapath-protocol.h" #include "util.h" +struct dpif_flow_stats; struct ds; struct flow_wildcards; struct ofp_match; struct ofpbuf; -#define FLOW_N_REGS 3 +/* This sequence number should be incremented whenever anything involving flows + * or the wildcarding of flows changes. This will cause build assertion + * failures in places which likely need to be updated. */ +#define FLOW_WC_SEQ 10 + +#define FLOW_N_REGS 8 BUILD_ASSERT_DECL(FLOW_N_REGS <= NXM_NX_MAX_REGS); +/* Used for struct flow's dl_type member for frames that have no Ethernet + * type, that is, pure 802.2 frames. */ +#define FLOW_DL_TYPE_NONE 0x5ff + +/* Fragment bits, used for IPv4 and IPv6, always zero for non-IP flows. */ +#define FLOW_NW_FRAG_ANY (1 << 0) /* Set for any IP frag. */ +#define FLOW_NW_FRAG_LATER (1 << 1) /* Set for IP frag with nonzero offset. */ +#define FLOW_NW_FRAG_MASK (FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER) + +BUILD_ASSERT_DECL(FLOW_NW_FRAG_ANY == NX_IP_FRAG_ANY); +BUILD_ASSERT_DECL(FLOW_NW_FRAG_LATER == NX_IP_FRAG_LATER); + struct flow { ovs_be64 tun_id; /* Encapsulating tunnel ID. */ + struct in6_addr ipv6_src; /* IPv6 source address. */ + struct in6_addr ipv6_dst; /* IPv6 destination address. */ + struct in6_addr nd_target; /* IPv6 neighbor discovery (ND) target. */ + uint32_t skb_priority; /* Packet priority for QoS. */ uint32_t regs[FLOW_N_REGS]; /* Registers. */ - ovs_be32 nw_src; /* IP source address. */ - ovs_be32 nw_dst; /* IP destination address. */ - uint16_t in_port; /* Input switch port. */ + ovs_be32 nw_src; /* IPv4 source address. */ + ovs_be32 nw_dst; /* IPv4 destination address. */ + ovs_be32 ipv6_label; /* IPv6 flow label. */ + uint16_t in_port; /* OpenFlow port number of input port. */ ovs_be16 vlan_tci; /* If 802.1Q, TCI | VLAN_CFI; otherwise 0. */ ovs_be16 dl_type; /* Ethernet frame type. */ ovs_be16 tp_src; /* TCP/UDP source port. */ @@ -48,31 +70,57 @@ struct flow { uint8_t dl_src[6]; /* Ethernet source address. */ uint8_t dl_dst[6]; /* Ethernet destination address. */ uint8_t nw_proto; /* IP protocol or low 8 bits of ARP opcode. */ - uint8_t nw_tos; /* IP ToS (DSCP field, 6 bits). */ - uint32_t reserved; /* Reserved for 64-bit packing. */ + uint8_t nw_tos; /* IP ToS (including DSCP and ECN). */ + uint8_t arp_sha[6]; /* ARP/ND source hardware address. */ + uint8_t arp_tha[6]; /* ARP/ND target hardware address. */ + uint8_t nw_ttl; /* IP TTL/Hop Limit. */ + uint8_t nw_frag; /* FLOW_FRAG_* flags. */ + uint8_t reserved[2]; /* Reserved for 64-bit packing. */ +}; + +/* Represents the metadata fields of struct flow. The masks are used to + * indicate which metadata fields are relevant in a given context. Typically + * they will be all 1 or all 0. */ +struct flow_metadata { + ovs_be64 tun_id; /* Encapsulating tunnel ID. */ + ovs_be64 tun_id_mask; /* 1-bit in each significant tun_id bit.*/ + + uint32_t regs[FLOW_N_REGS]; /* Registers. */ + uint32_t reg_masks[FLOW_N_REGS]; /* 1-bit in each significant regs bit. */ + + uint16_t in_port; /* OpenFlow port or zero. */ }; /* Assert that there are FLOW_SIG_SIZE bytes of significant data in "struct * flow", followed by FLOW_PAD_SIZE bytes of padding. */ -#define FLOW_SIG_SIZE (40 + FLOW_N_REGS * 4) -#define FLOW_PAD_SIZE 4 -BUILD_ASSERT_DECL(offsetof(struct flow, nw_tos) == FLOW_SIG_SIZE - 1); -BUILD_ASSERT_DECL(sizeof(((struct flow *)0)->nw_tos) == 1); +#define FLOW_SIG_SIZE (110 + FLOW_N_REGS * 4) +#define FLOW_PAD_SIZE 2 +BUILD_ASSERT_DECL(offsetof(struct flow, nw_frag) == FLOW_SIG_SIZE - 1); +BUILD_ASSERT_DECL(sizeof(((struct flow *)0)->nw_frag) == 1); BUILD_ASSERT_DECL(sizeof(struct flow) == FLOW_SIG_SIZE + FLOW_PAD_SIZE); -int flow_extract(struct ofpbuf *, uint64_t tun_id, uint16_t in_port, - struct flow *); -void flow_extract_stats(const struct flow *flow, struct ofpbuf *packet, - struct odp_flow_stats *stats); +/* Remember to update FLOW_WC_SEQ when changing 'struct flow'. */ +BUILD_ASSERT_DECL(FLOW_SIG_SIZE == 142 && FLOW_WC_SEQ == 10); + +void flow_extract(struct ofpbuf *, uint32_t priority, ovs_be64 tun_id, + uint16_t in_port, struct flow *); +void flow_zero_wildcards(struct flow *, const struct flow_wildcards *); +void flow_get_metadata(const struct flow *, struct flow_metadata *); + char *flow_to_string(const struct flow *); void flow_format(struct ds *, const struct flow *); void flow_print(FILE *, const struct flow *); -static inline int flow_compare(const struct flow *, const struct flow *); +static inline int flow_compare_3way(const struct flow *, const struct flow *); static inline bool flow_equal(const struct flow *, const struct flow *); static inline size_t flow_hash(const struct flow *, uint32_t basis); +void flow_set_vlan_vid(struct flow *, ovs_be16 vid); +void flow_set_vlan_pcp(struct flow *, uint8_t pcp); + +void flow_compose(struct ofpbuf *, const struct flow *); + static inline int -flow_compare(const struct flow *a, const struct flow *b) +flow_compare_3way(const struct flow *a, const struct flow *b) { return memcmp(a, b, FLOW_SIG_SIZE); } @@ -80,7 +128,7 @@ flow_compare(const struct flow *a, const struct flow *b) static inline bool flow_equal(const struct flow *a, const struct flow *b) { - return !flow_compare(a, b); + return !flow_compare_3way(a, b); } static inline size_t @@ -104,37 +152,50 @@ typedef unsigned int OVS_BITWISE flow_wildcards_t; /* excluding the multicast bit */ #define FWW_DL_TYPE ((OVS_FORCE flow_wildcards_t) (1 << 4)) #define FWW_NW_PROTO ((OVS_FORCE flow_wildcards_t) (1 << 5)) -#define FWW_TP_SRC ((OVS_FORCE flow_wildcards_t) (1 << 6)) -#define FWW_TP_DST ((OVS_FORCE flow_wildcards_t) (1 << 7)) -/* Same meanings as corresponding OFPFW_* bits, but differ in value. */ -#define FWW_NW_TOS ((OVS_FORCE flow_wildcards_t) (1 << 1)) -/* No OFPFW_* bits, but they do have corresponding OVSFW_* bits. */ -#define FWW_TUN_ID ((OVS_FORCE flow_wildcards_t) (1 << 8)) -/* No corresponding OFPFW_* or OVSFW_* bits. */ -#define FWW_ETH_MCAST ((OVS_FORCE flow_wildcards_t) (1 << 9)) +/* No corresponding OFPFW_* bits. */ +#define FWW_ETH_MCAST ((OVS_FORCE flow_wildcards_t) (1 << 1)) /* multicast bit only */ -#define FWW_ALL ((OVS_FORCE flow_wildcards_t) (((1 << 10)) - 1)) +#define FWW_NW_DSCP ((OVS_FORCE flow_wildcards_t) (1 << 6)) +#define FWW_NW_ECN ((OVS_FORCE flow_wildcards_t) (1 << 7)) +#define FWW_ARP_SHA ((OVS_FORCE flow_wildcards_t) (1 << 8)) +#define FWW_ARP_THA ((OVS_FORCE flow_wildcards_t) (1 << 9)) +#define FWW_IPV6_LABEL ((OVS_FORCE flow_wildcards_t) (1 << 10)) +#define FWW_NW_TTL ((OVS_FORCE flow_wildcards_t) (1 << 11)) +#define FWW_ALL ((OVS_FORCE flow_wildcards_t) (((1 << 12)) - 1)) + +/* Remember to update FLOW_WC_SEQ when adding or removing FWW_*. */ +BUILD_ASSERT_DECL(FWW_ALL == ((1 << 12) - 1) && FLOW_WC_SEQ == 10); /* Information on wildcards for a flow, as a supplement to "struct flow". * * Note that the meaning of 1-bits in 'wildcards' is opposite that of 1-bits in * the rest of the members. */ struct flow_wildcards { + ovs_be64 tun_id_mask; /* 1-bit in each significant tun_id bit. */ flow_wildcards_t wildcards; /* 1-bit in each FWW_* wildcarded field. */ uint32_t reg_masks[FLOW_N_REGS]; /* 1-bit in each significant regs bit. */ ovs_be32 nw_src_mask; /* 1-bit in each significant nw_src bit. */ ovs_be32 nw_dst_mask; /* 1-bit in each significant nw_dst bit. */ + struct in6_addr ipv6_src_mask; /* 1-bit in each signficant ipv6_src bit. */ + struct in6_addr ipv6_dst_mask; /* 1-bit in each signficant ipv6_dst bit. */ + struct in6_addr nd_target_mask; /* 1-bit in each significant + nd_target bit. */ ovs_be16 vlan_tci_mask; /* 1-bit in each significant vlan_tci bit. */ - uint16_t zero; /* Padding field set to zero. */ + ovs_be16 tp_src_mask; /* 1-bit in each significant tp_src bit. */ + ovs_be16 tp_dst_mask; /* 1-bit in each significant tp_dst bit. */ + uint8_t nw_frag_mask; /* 1-bit in each significant nw_frag bit. */ + uint8_t zeros[5]; /* Padding field set to zero. */ }; +/* Remember to update FLOW_WC_SEQ when updating struct flow_wildcards. */ +BUILD_ASSERT_DECL(sizeof(struct flow_wildcards) == 112 && FLOW_WC_SEQ == 10); + void flow_wildcards_init_catchall(struct flow_wildcards *); void flow_wildcards_init_exact(struct flow_wildcards *); bool flow_wildcards_is_exact(const struct flow_wildcards *); +bool flow_wildcards_is_catchall(const struct flow_wildcards *); -bool flow_wildcards_set_nw_src_mask(struct flow_wildcards *, ovs_be32); -bool flow_wildcards_set_nw_dst_mask(struct flow_wildcards *, ovs_be32); void flow_wildcards_set_reg_mask(struct flow_wildcards *, int idx, uint32_t mask); @@ -144,8 +205,18 @@ void flow_wildcards_combine(struct flow_wildcards *dst, bool flow_wildcards_has_extra(const struct flow_wildcards *, const struct flow_wildcards *); -uint32_t flow_wildcards_hash(const struct flow_wildcards *); +uint32_t flow_wildcards_hash(const struct flow_wildcards *, uint32_t basis); bool flow_wildcards_equal(const struct flow_wildcards *, const struct flow_wildcards *); +uint32_t flow_hash_symmetric_l4(const struct flow *flow, uint32_t basis); + +const uint8_t *flow_wildcards_to_dl_dst_mask(flow_wildcards_t); +bool flow_wildcards_is_dl_dst_mask_valid(const uint8_t[6]); +flow_wildcards_t flow_wildcards_set_dl_dst_mask(flow_wildcards_t, + const uint8_t mask[6]); +uint32_t flow_hash_fields(const struct flow *, enum nx_hash_fields, + uint16_t basis); +const char *flow_hash_fields_to_str(enum nx_hash_fields); +bool flow_hash_fields_valid(enum nx_hash_fields); #endif /* flow.h */