X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fflow.h;h=e9da2ad4d3725be7244382336a8e557cc5682e0b;hb=7bde8dd8f56d081398f6b6317b17ca41a3fdc81b;hp=d331aa3613785b596580bc2cdb5bad134c49f1d9;hpb=d31f1109f10e5ffb9bf266306b913ebf23781666;p=openvswitch diff --git a/lib/flow.h b/lib/flow.h index d331aa36..e9da2ad4 100644 --- a/lib/flow.h +++ b/lib/flow.h @@ -24,7 +24,6 @@ #include "openflow/nicira-ext.h" #include "openflow/openflow.h" #include "hash.h" -#include "openvswitch/datapath-protocol.h" #include "util.h" struct dpif_flow_stats; @@ -33,19 +32,32 @@ struct flow_wildcards; struct ofp_match; struct ofpbuf; -#define FLOW_N_REGS 4 +/* 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 3 + +#define FLOW_N_REGS 5 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_FRAG_ANY (1 << 0) /* Set for any IP fragment. */ +#define FLOW_FRAG_LATER (1 << 1) /* Set for IP fragment with nonzero offset. */ +#define FLOW_FRAG_MASK (FLOW_FRAG_ANY | FLOW_FRAG_LATER) + +BUILD_ASSERT_DECL(FLOW_FRAG_ANY == NX_IP_FRAG_ANY); +BUILD_ASSERT_DECL(FLOW_FRAG_LATER == NX_IP_FRAG_LATER); + struct flow { ovs_be64 tun_id; /* Encapsulating tunnel ID. */ uint32_t regs[FLOW_N_REGS]; /* Registers. */ ovs_be32 nw_src; /* IPv4 source address. */ ovs_be32 nw_dst; /* IPv4 destination address. */ - uint16_t in_port; /* Input switch port. */ + 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. */ @@ -53,26 +65,29 @@ 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). */ - uint8_t arp_sha[6]; /* ARP source hardware address. */ - uint8_t arp_tha[6]; /* ARP target hardware address. */ + uint8_t tos_frag; /* IP ToS in top bits, FLOW_FRAG_* in low. */ + uint8_t arp_sha[6]; /* ARP/ND source hardware address. */ + uint8_t arp_tha[6]; /* ARP/ND target hardware address. */ struct in6_addr ipv6_src; /* IPv6 source address. */ struct in6_addr ipv6_dst; /* IPv6 destination address. */ - uint32_t reserved; /* Reserved for 64-bit packing. */ + struct in6_addr nd_target; /* IPv6 neighbor discovery (ND) target. */ }; /* 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 (84 + FLOW_N_REGS * 4) -#define FLOW_PAD_SIZE 4 -BUILD_ASSERT_DECL(offsetof(struct flow, ipv6_dst) == FLOW_SIG_SIZE - 16); -BUILD_ASSERT_DECL(sizeof(((struct flow *)0)->ipv6_dst) == 16); +#define FLOW_SIG_SIZE (100 + FLOW_N_REGS * 4) +#define FLOW_PAD_SIZE 0 +BUILD_ASSERT_DECL(offsetof(struct flow, nd_target) == FLOW_SIG_SIZE - 16); +BUILD_ASSERT_DECL(sizeof(((struct flow *)0)->nd_target) == 16); 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 dpif_flow_stats *); +/* Remember to update FLOW_WC_SEQ when changing 'struct flow'. */ +BUILD_ASSERT_DECL(FLOW_SIG_SIZE == 120 && FLOW_WC_SEQ == 3); + +void flow_extract(struct ofpbuf *, ovs_be64 tun_id, uint16_t in_port, + struct flow *); +void flow_zero_wildcards(struct flow *, const struct flow_wildcards *); + char *flow_to_string(const struct flow *); void flow_format(struct ds *, const struct flow *); void flow_print(FILE *, const struct flow *); @@ -80,6 +95,8 @@ static inline int flow_compare(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_compose(struct ofpbuf *, const struct flow *); + static inline int flow_compare(const struct flow *a, const struct flow *b) { @@ -115,15 +132,17 @@ typedef unsigned int OVS_BITWISE flow_wildcards_t; #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 corresponding OFPFW_* or OVSFW_* bits. */ -#define FWW_ETH_MCAST ((OVS_FORCE flow_wildcards_t) (1 << 8)) +/* No corresponding OFPFW_* bits. */ +#define FWW_ETH_MCAST ((OVS_FORCE flow_wildcards_t) (1 << 1)) /* multicast bit only */ -#define FWW_ARP_SHA ((OVS_FORCE flow_wildcards_t) (1 << 9)) -#define FWW_ARP_THA ((OVS_FORCE flow_wildcards_t) (1 << 10)) +#define FWW_ARP_SHA ((OVS_FORCE flow_wildcards_t) (1 << 8)) +#define FWW_ARP_THA ((OVS_FORCE flow_wildcards_t) (1 << 9)) +#define FWW_ND_TARGET ((OVS_FORCE flow_wildcards_t) (1 << 10)) #define FWW_ALL ((OVS_FORCE flow_wildcards_t) (((1 << 11)) - 1)) +/* Remember to update FLOW_WC_SEQ when adding or removing FWW_*. */ +BUILD_ASSERT_DECL(FWW_ALL == ((1 << 11) - 1) && FLOW_WC_SEQ == 3); + /* 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 @@ -137,13 +156,18 @@ struct flow_wildcards { 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. */ ovs_be16 vlan_tci_mask; /* 1-bit in each significant vlan_tci bit. */ - uint16_t zero; /* Padding field set to zero. */ + uint8_t tos_frag_mask; /* 1-bit in each significant tos_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) == 80 && FLOW_WC_SEQ == 3); + 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); @@ -160,9 +184,18 @@ 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 */