X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fflow.c;h=76d234057957ec6346143a7f92f269b5bdf5d83a;hb=f8e4867eafd076e94bdb5bcf7c7dc69ca7a9c8ae;hp=76f6b27f38ffc84dba9cac99d2a92b43cfeddca8;hpb=32455024044444678a8d500d716dad7fb77e18d0;p=openvswitch diff --git a/lib/flow.c b/lib/flow.c index 76f6b27f..76d23405 100644 --- a/lib/flow.c +++ b/lib/flow.c @@ -19,13 +19,16 @@ #include #include #include +#include #include #include #include +#include #include #include #include "byte-order.h" #include "coverage.h" +#include "csum.h" #include "dynamic-string.h" #include "hash.h" #include "ofpbuf.h" @@ -37,6 +40,7 @@ VLOG_DEFINE_THIS_MODULE(flow); COVERAGE_DEFINE(flow_extract); +COVERAGE_DEFINE(miniflow_malloc); static struct arp_eth_header * pull_arp(struct ofpbuf *packet) @@ -179,7 +183,7 @@ parse_ipv6(struct ofpbuf *packet, struct flow *flow) || (nexthdr == IPPROTO_DSTOPTS)) { /* These headers, while different, have the fields we care about * in the same location and with the same interpretation. */ - const struct ip6_ext *ext_hdr = (struct ip6_ext *)packet->data; + const struct ip6_ext *ext_hdr = packet->data; nexthdr = ext_hdr->ip6e_nxt; if (!ofpbuf_try_pull(packet, (ext_hdr->ip6e_len + 1) * 8)) { return EINVAL; @@ -189,13 +193,13 @@ parse_ipv6(struct ofpbuf *packet, struct flow *flow) * we care about are in the same location as the generic * option header--only the header length is calculated * differently. */ - const struct ip6_ext *ext_hdr = (struct ip6_ext *)packet->data; + const struct ip6_ext *ext_hdr = packet->data; nexthdr = ext_hdr->ip6e_nxt; if (!ofpbuf_try_pull(packet, (ext_hdr->ip6e_len + 2) * 4)) { return EINVAL; } } else if (nexthdr == IPPROTO_FRAGMENT) { - const struct ip6_frag *frag_hdr = (struct ip6_frag *)packet->data; + const struct ip6_frag *frag_hdr = packet->data; nexthdr = frag_hdr->ip6f_nxt; if (!ofpbuf_try_pull(packet, sizeof *frag_hdr)) { @@ -312,7 +316,7 @@ invalid: } -/* Initializes 'flow' members from 'packet', 'skb_priority', 'tun_id', and +/* Initializes 'flow' members from 'packet', 'skb_priority', 'tnl', and * 'ofp_in_port'. * * Initializes 'packet' header pointers as follows: @@ -330,8 +334,9 @@ invalid: * present and has a correct length, and otherwise NULL. */ void -flow_extract(struct ofpbuf *packet, uint32_t skb_priority, ovs_be64 tun_id, - uint16_t ofp_in_port, struct flow *flow) +flow_extract(struct ofpbuf *packet, uint32_t skb_priority, + const struct flow_tnl *tnl, uint16_t ofp_in_port, + struct flow *flow) { struct ofpbuf b = *packet; struct eth_header *eth; @@ -339,7 +344,11 @@ flow_extract(struct ofpbuf *packet, uint32_t skb_priority, ovs_be64 tun_id, COVERAGE_INC(flow_extract); memset(flow, 0, sizeof *flow); - flow->tun_id = tun_id; + + if (tnl) { + assert(tnl != &flow->tunnel); + flow->tunnel = *tnl; + } flow->in_port = ofp_in_port; flow->skb_priority = skb_priority; @@ -441,73 +450,24 @@ flow_extract(struct ofpbuf *packet, uint32_t skb_priority, ovs_be64 tun_id, void flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards) { - const flow_wildcards_t wc = wildcards->wildcards; - int i; + uint32_t *flow_u32 = (uint32_t *) flow; + const uint32_t *wc_u32 = (const uint32_t *) &wildcards->masks; + size_t i; - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - for (i = 0; i < FLOW_N_REGS; i++) { - flow->regs[i] &= wildcards->reg_masks[i]; - } - flow->tun_id &= wildcards->tun_id_mask; - flow->metadata &= wildcards->metadata_mask; - flow->nw_src &= wildcards->nw_src_mask; - flow->nw_dst &= wildcards->nw_dst_mask; - if (wc & FWW_IN_PORT) { - flow->in_port = 0; - } - flow->vlan_tci &= wildcards->vlan_tci_mask; - if (wc & FWW_DL_TYPE) { - flow->dl_type = htons(0); - } - flow->tp_src &= wildcards->tp_src_mask; - flow->tp_dst &= wildcards->tp_dst_mask; - eth_addr_bitand(flow->dl_src, wildcards->dl_src_mask, flow->dl_src); - eth_addr_bitand(flow->dl_dst, wildcards->dl_dst_mask, flow->dl_dst); - if (wc & FWW_NW_PROTO) { - flow->nw_proto = 0; - } - flow->ipv6_label &= wildcards->ipv6_label_mask; - if (wc & FWW_NW_DSCP) { - flow->nw_tos &= ~IP_DSCP_MASK; - } - if (wc & FWW_NW_ECN) { - flow->nw_tos &= ~IP_ECN_MASK; + for (i = 0; i < FLOW_U32S; i++) { + flow_u32[i] &= wc_u32[i]; } - if (wc & FWW_NW_TTL) { - flow->nw_ttl = 0; - } - flow->nw_frag &= wildcards->nw_frag_mask; - if (wc & FWW_ARP_SHA) { - memset(flow->arp_sha, 0, sizeof flow->arp_sha); - } - if (wc & FWW_ARP_THA) { - memset(flow->arp_tha, 0, sizeof flow->arp_tha); - } - flow->ipv6_src = ipv6_addr_bitand(&flow->ipv6_src, - &wildcards->ipv6_src_mask); - flow->ipv6_dst = ipv6_addr_bitand(&flow->ipv6_dst, - &wildcards->ipv6_dst_mask); - flow->nd_target = ipv6_addr_bitand(&flow->nd_target, - &wildcards->nd_target_mask); - flow->skb_priority = 0; } /* Initializes 'fmd' with the metadata found in 'flow'. */ void flow_get_metadata(const struct flow *flow, struct flow_metadata *fmd) { - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - fmd->tun_id = flow->tun_id; - fmd->tun_id_mask = htonll(UINT64_MAX); + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17); + fmd->tun_id = flow->tunnel.tun_id; fmd->metadata = flow->metadata; - fmd->metadata_mask = htonll(UINT64_MAX); - memcpy(fmd->regs, flow->regs, sizeof fmd->regs); - memset(fmd->reg_masks, 0xff, sizeof fmd->reg_masks); - fmd->in_port = flow->in_port; } @@ -519,15 +479,46 @@ flow_to_string(const struct flow *flow) return ds_cstr(&ds); } +static void format_tunnel_flags(uint16_t flags, struct ds *ds) +{ + flags &= ~FLOW_TNL_F_KEY; + + if (flags & FLOW_TNL_F_DONT_FRAGMENT) { + ds_put_cstr(ds, ",df"); + flags &= ~FLOW_TNL_F_DONT_FRAGMENT; + } + + if (flags & FLOW_TNL_F_CSUM) { + ds_put_cstr(ds, ",csum"); + flags &= ~FLOW_TNL_F_CSUM; + } + + if (flags) { + ds_put_format(ds, ",flags:%#"PRIx16, flags); + } +} + void flow_format(struct ds *ds, const struct flow *flow) { - ds_put_format(ds, "priority:%"PRIu32 - ",tunnel:%#"PRIx64 - ",metadata:%#"PRIx64 + ds_put_format(ds, "priority:%"PRIu32, flow->skb_priority); + + if (flow->tunnel.ip_dst || flow->tunnel.tun_id) { + ds_put_cstr(ds, ",tunnel("); + ds_put_format(ds, IP_FMT"->"IP_FMT, IP_ARGS(&flow->tunnel.ip_src), + IP_ARGS(&flow->tunnel.ip_dst)); + + if (flow->tunnel.flags & FLOW_TNL_F_KEY) { + ds_put_format(ds, ",key:%#"PRIx64, ntohll(flow->tunnel.tun_id)); + } + ds_put_format(ds, ",tos:%#"PRIx8",ttl:%"PRIu8, flow->tunnel.ip_tos, + flow->tunnel.ip_ttl); + format_tunnel_flags(flow->tunnel.flags, ds); + ds_put_char(ds, ')'); + } + + ds_put_format(ds, ",metadata:%#"PRIx64 ",in_port:%04"PRIx16, - flow->skb_priority, - ntohll(flow->tun_id), ntohll(flow->metadata), flow->in_port); @@ -554,7 +545,8 @@ flow_format(struct ds *ds, const struct flow *flow) ds_put_cstr(ds, "->"); print_ipv6_addr(ds, &flow->ipv6_dst); ds_put_char(ds, ')'); - } else { + } else if (flow->dl_type == htons(ETH_TYPE_IP) || + flow->dl_type == htons(ETH_TYPE_ARP)) { ds_put_format(ds, " proto:%"PRIu8" tos:%#"PRIx8" ttl:%"PRIu8 " ip("IP_FMT"->"IP_FMT")", flow->nw_proto, flow->nw_tos, flow->nw_ttl, @@ -591,25 +583,7 @@ flow_print(FILE *stream, const struct flow *flow) void flow_wildcards_init_catchall(struct flow_wildcards *wc) { - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - wc->wildcards = FWW_ALL; - wc->tun_id_mask = htonll(0); - wc->nw_src_mask = htonl(0); - wc->nw_dst_mask = htonl(0); - wc->ipv6_src_mask = in6addr_any; - wc->ipv6_dst_mask = in6addr_any; - wc->ipv6_label_mask = htonl(0); - wc->nd_target_mask = in6addr_any; - memset(wc->reg_masks, 0, sizeof wc->reg_masks); - wc->metadata_mask = htonll(0); - wc->vlan_tci_mask = htons(0); - wc->nw_frag_mask = 0; - wc->tp_src_mask = htons(0); - wc->tp_dst_mask = htons(0); - memset(wc->dl_src_mask, 0, ETH_ADDR_LEN); - memset(wc->dl_dst_mask, 0, ETH_ADDR_LEN); - memset(wc->zeros, 0, sizeof wc->zeros); + memset(&wc->masks, 0, sizeof wc->masks); } /* Initializes 'wc' as an exact-match set of wildcards; that is, 'wc' does not @@ -617,61 +591,8 @@ flow_wildcards_init_catchall(struct flow_wildcards *wc) void flow_wildcards_init_exact(struct flow_wildcards *wc) { - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - wc->wildcards = 0; - wc->tun_id_mask = htonll(UINT64_MAX); - wc->nw_src_mask = htonl(UINT32_MAX); - wc->nw_dst_mask = htonl(UINT32_MAX); - wc->ipv6_src_mask = in6addr_exact; - wc->ipv6_dst_mask = in6addr_exact; - wc->ipv6_label_mask = htonl(UINT32_MAX); - wc->nd_target_mask = in6addr_exact; - memset(wc->reg_masks, 0xff, sizeof wc->reg_masks); - wc->metadata_mask = htonll(UINT64_MAX); - wc->vlan_tci_mask = htons(UINT16_MAX); - wc->nw_frag_mask = UINT8_MAX; - wc->tp_src_mask = htons(UINT16_MAX); - wc->tp_dst_mask = htons(UINT16_MAX); - memset(wc->dl_src_mask, 0xff, ETH_ADDR_LEN); - memset(wc->dl_dst_mask, 0xff, ETH_ADDR_LEN); - memset(wc->zeros, 0, sizeof wc->zeros); -} - -/* Returns true if 'wc' is exact-match, false if 'wc' wildcards any bits or - * fields. */ -bool -flow_wildcards_is_exact(const struct flow_wildcards *wc) -{ - int i; - - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - if (wc->wildcards - || wc->tun_id_mask != htonll(UINT64_MAX) - || wc->nw_src_mask != htonl(UINT32_MAX) - || wc->nw_dst_mask != htonl(UINT32_MAX) - || wc->tp_src_mask != htons(UINT16_MAX) - || wc->tp_dst_mask != htons(UINT16_MAX) - || wc->vlan_tci_mask != htons(UINT16_MAX) - || wc->metadata_mask != htonll(UINT64_MAX) - || !eth_mask_is_exact(wc->dl_src_mask) - || !eth_mask_is_exact(wc->dl_dst_mask) - || !ipv6_mask_is_exact(&wc->ipv6_src_mask) - || !ipv6_mask_is_exact(&wc->ipv6_dst_mask) - || wc->ipv6_label_mask != htonl(UINT32_MAX) - || !ipv6_mask_is_exact(&wc->nd_target_mask) - || wc->nw_frag_mask != UINT8_MAX) { - return false; - } - - for (i = 0; i < FLOW_N_REGS; i++) { - if (wc->reg_masks[i] != UINT32_MAX) { - return false; - } - } - - return true; + memset(&wc->masks, 0xff, sizeof wc->masks); + memset(wc->masks.zeros, 0, sizeof wc->masks.zeros); } /* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or @@ -679,34 +600,14 @@ flow_wildcards_is_exact(const struct flow_wildcards *wc) bool flow_wildcards_is_catchall(const struct flow_wildcards *wc) { - int i; + const uint32_t *wc_u32 = (const uint32_t *) &wc->masks; + size_t i; - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - if (wc->wildcards != FWW_ALL - || wc->tun_id_mask != htonll(0) - || wc->nw_src_mask != htonl(0) - || wc->nw_dst_mask != htonl(0) - || wc->tp_src_mask != htons(0) - || wc->tp_dst_mask != htons(0) - || wc->vlan_tci_mask != htons(0) - || wc->metadata_mask != htonll(0) - || !eth_addr_is_zero(wc->dl_src_mask) - || !eth_addr_is_zero(wc->dl_dst_mask) - || !ipv6_mask_is_any(&wc->ipv6_src_mask) - || !ipv6_mask_is_any(&wc->ipv6_dst_mask) - || wc->ipv6_label_mask != htonl(0) - || !ipv6_mask_is_any(&wc->nd_target_mask) - || wc->nw_frag_mask != 0) { - return false; - } - - for (i = 0; i < FLOW_N_REGS; i++) { - if (wc->reg_masks[i] != 0) { + for (i = 0; i < FLOW_U32S; i++) { + if (wc_u32[i]) { return false; } } - return true; } @@ -718,41 +619,21 @@ flow_wildcards_combine(struct flow_wildcards *dst, const struct flow_wildcards *src1, const struct flow_wildcards *src2) { - int i; + uint32_t *dst_u32 = (uint32_t *) &dst->masks; + const uint32_t *src1_u32 = (const uint32_t *) &src1->masks; + const uint32_t *src2_u32 = (const uint32_t *) &src2->masks; + size_t i; - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - dst->wildcards = src1->wildcards | src2->wildcards; - dst->tun_id_mask = src1->tun_id_mask & src2->tun_id_mask; - dst->nw_src_mask = src1->nw_src_mask & src2->nw_src_mask; - dst->nw_dst_mask = src1->nw_dst_mask & src2->nw_dst_mask; - dst->ipv6_src_mask = ipv6_addr_bitand(&src1->ipv6_src_mask, - &src2->ipv6_src_mask); - dst->ipv6_dst_mask = ipv6_addr_bitand(&src1->ipv6_dst_mask, - &src2->ipv6_dst_mask); - dst->ipv6_label_mask = src1->ipv6_label_mask & src2->ipv6_label_mask; - dst->nd_target_mask = ipv6_addr_bitand(&src1->nd_target_mask, - &src2->nd_target_mask); - for (i = 0; i < FLOW_N_REGS; i++) { - dst->reg_masks[i] = src1->reg_masks[i] & src2->reg_masks[i]; + for (i = 0; i < FLOW_U32S; i++) { + dst_u32[i] = src1_u32[i] & src2_u32[i]; } - dst->metadata_mask = src1->metadata_mask & src2->metadata_mask; - dst->vlan_tci_mask = src1->vlan_tci_mask & src2->vlan_tci_mask; - dst->tp_src_mask = src1->tp_src_mask & src2->tp_src_mask; - dst->tp_dst_mask = src1->tp_dst_mask & src2->tp_dst_mask; - eth_addr_bitand(src1->dl_src_mask, src2->dl_src_mask, dst->dl_src_mask); - eth_addr_bitand(src1->dl_dst_mask, src2->dl_dst_mask, dst->dl_dst_mask); } /* Returns a hash of the wildcards in 'wc'. */ uint32_t flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis) { - /* If you change struct flow_wildcards and thereby trigger this - * assertion, please check that the new struct flow_wildcards has no holes - * in it before you update the assertion. */ - BUILD_ASSERT_DECL(sizeof *wc == 104 + FLOW_N_REGS * 4); - return hash_bytes(wc, sizeof *wc, basis); + return flow_hash(&wc->masks, basis);; } /* Returns true if 'a' and 'b' represent the same wildcards, false if they are @@ -761,34 +642,7 @@ bool flow_wildcards_equal(const struct flow_wildcards *a, const struct flow_wildcards *b) { - int i; - - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - if (a->wildcards != b->wildcards - || a->tun_id_mask != b->tun_id_mask - || a->nw_src_mask != b->nw_src_mask - || a->nw_dst_mask != b->nw_dst_mask - || a->vlan_tci_mask != b->vlan_tci_mask - || a->metadata_mask != b->metadata_mask - || !ipv6_addr_equals(&a->ipv6_src_mask, &b->ipv6_src_mask) - || !ipv6_addr_equals(&a->ipv6_dst_mask, &b->ipv6_dst_mask) - || a->ipv6_label_mask != b->ipv6_label_mask - || !ipv6_addr_equals(&a->nd_target_mask, &b->nd_target_mask) - || a->tp_src_mask != b->tp_src_mask - || a->tp_dst_mask != b->tp_dst_mask - || !eth_addr_equals(a->dl_src_mask, b->dl_src_mask) - || !eth_addr_equals(a->dl_dst_mask, b->dl_dst_mask)) { - return false; - } - - for (i = 0; i < FLOW_N_REGS; i++) { - if (a->reg_masks[i] != b->reg_masks[i]) { - return false; - } - } - - return true; + return flow_equal(&a->masks, &b->masks); } /* Returns true if at least one bit or field is wildcarded in 'a' but not in @@ -797,52 +651,35 @@ bool flow_wildcards_has_extra(const struct flow_wildcards *a, const struct flow_wildcards *b) { - int i; - uint8_t eth_masked[ETH_ADDR_LEN]; - struct in6_addr ipv6_masked; + const uint32_t *a_u32 = (const uint32_t *) &a->masks; + const uint32_t *b_u32 = (const uint32_t *) &b->masks; + size_t i; - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 13); - - for (i = 0; i < FLOW_N_REGS; i++) { - if ((a->reg_masks[i] & b->reg_masks[i]) != b->reg_masks[i]) { + for (i = 0; i < FLOW_U32S; i++) { + if ((a_u32[i] & b_u32[i]) != b_u32[i]) { return true; } } + return false; +} - eth_addr_bitand(a->dl_src_mask, b->dl_src_mask, eth_masked); - if (!eth_addr_equals(eth_masked, b->dl_src_mask)) { - return true; - } - - eth_addr_bitand(a->dl_dst_mask, b->dl_dst_mask, eth_masked); - if (!eth_addr_equals(eth_masked, b->dl_dst_mask)) { - return true; - } - - ipv6_masked = ipv6_addr_bitand(&a->ipv6_src_mask, &b->ipv6_src_mask); - if (!ipv6_addr_equals(&ipv6_masked, &b->ipv6_src_mask)) { - return true; - } - - ipv6_masked = ipv6_addr_bitand(&a->ipv6_dst_mask, &b->ipv6_dst_mask); - if (!ipv6_addr_equals(&ipv6_masked, &b->ipv6_dst_mask)) { - return true; - } +/* Returns true if 'a' and 'b' are equal, except that 0-bits (wildcarded bits) + * in 'wc' do not need to be equal in 'a' and 'b'. */ +bool +flow_equal_except(const struct flow *a, const struct flow *b, + const struct flow_wildcards *wc) +{ + const uint32_t *a_u32 = (const uint32_t *) a; + const uint32_t *b_u32 = (const uint32_t *) b; + const uint32_t *wc_u32 = (const uint32_t *) &wc->masks; + size_t i; - ipv6_masked = ipv6_addr_bitand(&a->nd_target_mask, &b->nd_target_mask); - if (!ipv6_addr_equals(&ipv6_masked, &b->nd_target_mask)) { - return true; + for (i = 0; i < FLOW_U32S; i++) { + if ((a_u32[i] ^ b_u32[i]) & wc_u32[i]) { + return false; + } } - - return (a->wildcards & ~b->wildcards - || (a->tun_id_mask & b->tun_id_mask) != b->tun_id_mask - || (a->nw_src_mask & b->nw_src_mask) != b->nw_src_mask - || (a->nw_dst_mask & b->nw_dst_mask) != b->nw_dst_mask - || (a->ipv6_label_mask & b->ipv6_label_mask) != b->ipv6_label_mask - || (a->vlan_tci_mask & b->vlan_tci_mask) != b->vlan_tci_mask - || (a->metadata_mask & b->metadata_mask) != b->metadata_mask - || (a->tp_src_mask & b->tp_src_mask) != b->tp_src_mask - || (a->tp_dst_mask & b->tp_dst_mask) != b->tp_dst_mask); + return true; } /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'. @@ -850,7 +687,7 @@ flow_wildcards_has_extra(const struct flow_wildcards *a, void flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask) { - wc->reg_masks[idx] = mask; + wc->masks.regs[idx] = mask; } /* Hashes 'flow' based on its L2 through L4 protocol information. */ @@ -950,7 +787,7 @@ flow_hash_fields_valid(enum nx_hash_fields fields) * * - Other values of 'vid' should not be used. */ void -flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) +flow_set_dl_vlan(struct flow *flow, ovs_be16 vid) { if (vid == htons(OFP10_VLAN_NONE)) { flow->vlan_tci = htons(0); @@ -961,6 +798,17 @@ flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) } } +/* Sets the VLAN VID that 'flow' matches to 'vid', which is interpreted as an + * OpenFlow 1.2 "vlan_vid" value, that is, the low 13 bits of 'vlan_tci' (VID + * plus CFI). */ +void +flow_set_vlan_vid(struct flow *flow, ovs_be16 vid) +{ + ovs_be16 mask = htons(VLAN_VID_MASK | VLAN_CFI); + flow->vlan_tci &= ~mask; + flow->vlan_tci |= vid & mask; +} + /* Sets the VLAN PCP that 'flow' matches to 'pcp', which should be in the * range 0...7. * @@ -980,7 +828,7 @@ flow_set_vlan_pcp(struct flow *flow, uint8_t pcp) * 'flow'. * * (This is useful only for testing, obviously, and the packet isn't really - * valid. It hasn't got any checksums filled in, for one, and lots of fields + * valid. It hasn't got some checksums filled in, for one, and lots of fields * are just zeroed.) */ void flow_compose(struct ofpbuf *b, const struct flow *flow) @@ -1033,11 +881,14 @@ flow_compose(struct ofpbuf *b, const struct flow *flow) b->l4 = icmp = ofpbuf_put_zeros(b, sizeof *icmp); icmp->icmp_type = ntohs(flow->tp_src); icmp->icmp_code = ntohs(flow->tp_dst); + icmp->icmp_csum = csum(icmp, ICMP_HEADER_LEN); } } + ip = b->l3; ip->ip_tot_len = htons((uint8_t *) b->data + b->size - (uint8_t *) b->l3); + ip->ip_csum = csum(ip, sizeof *ip); } else if (flow->dl_type == htons(ETH_TYPE_IPV6)) { /* XXX */ } else if (flow->dl_type == htons(ETH_TYPE_ARP)) { @@ -1059,3 +910,416 @@ flow_compose(struct ofpbuf *b, const struct flow *flow) } } } + +/* Compressed flow. */ + +static int +miniflow_n_values(const struct miniflow *flow) +{ + int n, i; + + n = 0; + for (i = 0; i < MINI_N_MAPS; i++) { + n += popcount(flow->map[i]); + } + return n; +} + +static uint32_t * +miniflow_alloc_values(struct miniflow *flow, int n) +{ + if (n <= MINI_N_INLINE) { + return flow->inline_values; + } else { + COVERAGE_INC(miniflow_malloc); + return xmalloc(n * sizeof *flow->values); + } +} + +/* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' + * with miniflow_destroy(). */ +void +miniflow_init(struct miniflow *dst, const struct flow *src) +{ + const uint32_t *src_u32 = (const uint32_t *) src; + unsigned int ofs; + unsigned int i; + int n; + + /* Initialize dst->map, counting the number of nonzero elements. */ + n = 0; + memset(dst->map, 0, sizeof dst->map); + for (i = 0; i < FLOW_U32S; i++) { + if (src_u32[i]) { + dst->map[i / 32] |= 1u << (i % 32); + n++; + } + } + + /* Initialize dst->values. */ + dst->values = miniflow_alloc_values(dst, n); + ofs = 0; + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + for (map = dst->map[i]; map; map = zero_rightmost_1bit(map)) { + dst->values[ofs++] = src_u32[raw_ctz(map) + i * 32]; + } + } +} + +/* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' + * with miniflow_destroy(). */ +void +miniflow_clone(struct miniflow *dst, const struct miniflow *src) +{ + int n = miniflow_n_values(src); + memcpy(dst->map, src->map, sizeof dst->map); + dst->values = miniflow_alloc_values(dst, n); + memcpy(dst->values, src->values, n * sizeof *dst->values); +} + +/* Frees any memory owned by 'flow'. Does not free the storage in which 'flow' + * itself resides; the caller is responsible for that. */ +void +miniflow_destroy(struct miniflow *flow) +{ + if (flow->values != flow->inline_values) { + free(flow->values); + } +} + +/* Initializes 'dst' as a copy of 'src'. */ +void +miniflow_expand(const struct miniflow *src, struct flow *dst) +{ + uint32_t *dst_u32 = (uint32_t *) dst; + int ofs; + int i; + + memset(dst_u32, 0, sizeof *dst); + + ofs = 0; + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + for (map = src->map[i]; map; map = zero_rightmost_1bit(map)) { + dst_u32[raw_ctz(map) + i * 32] = src->values[ofs++]; + } + } +} + +static const uint32_t * +miniflow_get__(const struct miniflow *flow, unsigned int u32_ofs) +{ + if (!(flow->map[u32_ofs / 32] & (1u << (u32_ofs % 32)))) { + static const uint32_t zero = 0; + return &zero; + } else { + const uint32_t *p = flow->values; + + BUILD_ASSERT(MINI_N_MAPS == 2); + if (u32_ofs < 32) { + p += popcount(flow->map[0] & ((1u << u32_ofs) - 1)); + } else { + p += popcount(flow->map[0]); + p += popcount(flow->map[1] & ((1u << (u32_ofs - 32)) - 1)); + } + return p; + } +} + +/* Returns the uint32_t that would be at byte offset '4 * u32_ofs' if 'flow' + * were expanded into a "struct flow". */ +uint32_t +miniflow_get(const struct miniflow *flow, unsigned int u32_ofs) +{ + return *miniflow_get__(flow, u32_ofs); +} + +/* Returns the ovs_be16 that would be at byte offset 'u8_ofs' if 'flow' were + * expanded into a "struct flow". */ +static ovs_be16 +miniflow_get_be16(const struct miniflow *flow, unsigned int u8_ofs) +{ + const uint32_t *u32p = miniflow_get__(flow, u8_ofs / 4); + const ovs_be16 *be16p = (const ovs_be16 *) u32p; + return be16p[u8_ofs % 4 != 0]; +} + +/* Returns the VID within the vlan_tci member of the "struct flow" represented + * by 'flow'. */ +uint16_t +miniflow_get_vid(const struct miniflow *flow) +{ + ovs_be16 tci = miniflow_get_be16(flow, offsetof(struct flow, vlan_tci)); + return vlan_tci_to_vid(tci); +} + +/* Returns true if 'a' and 'b' are the same flow, false otherwise. */ +bool +miniflow_equal(const struct miniflow *a, const struct miniflow *b) +{ + int i; + + for (i = 0; i < MINI_N_MAPS; i++) { + if (a->map[i] != b->map[i]) { + return false; + } + } + + return !memcmp(a->values, b->values, + miniflow_n_values(a) * sizeof *a->values); +} + +/* Returns true if 'a' and 'b' are equal at the places where there are 1-bits + * in 'mask', false if they differ. */ +bool +miniflow_equal_in_minimask(const struct miniflow *a, const struct miniflow *b, + const struct minimask *mask) +{ + const uint32_t *p; + int i; + + p = mask->masks.values; + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + for (map = mask->masks.map[i]; map; map = zero_rightmost_1bit(map)) { + int ofs = raw_ctz(map) + i * 32; + + if ((miniflow_get(a, ofs) ^ miniflow_get(b, ofs)) & *p) { + return false; + } + p++; + } + } + + return true; +} + +/* Returns true if 'a' and 'b' are equal at the places where there are 1-bits + * in 'mask', false if they differ. */ +bool +miniflow_equal_flow_in_minimask(const struct miniflow *a, const struct flow *b, + const struct minimask *mask) +{ + const uint32_t *b_u32 = (const uint32_t *) b; + const uint32_t *p; + int i; + + p = mask->masks.values; + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + for (map = mask->masks.map[i]; map; map = zero_rightmost_1bit(map)) { + int ofs = raw_ctz(map) + i * 32; + + if ((miniflow_get(a, ofs) ^ b_u32[ofs]) & *p) { + return false; + } + p++; + } + } + + return true; +} + +/* Returns a hash value for 'flow', given 'basis'. */ +uint32_t +miniflow_hash(const struct miniflow *flow, uint32_t basis) +{ + BUILD_ASSERT_DECL(MINI_N_MAPS == 2); + return hash_3words(flow->map[0], flow->map[1], + hash_words(flow->values, miniflow_n_values(flow), + basis)); +} + +/* Returns a hash value for the bits of 'flow' where there are 1-bits in + * 'mask', given 'basis'. + * + * The hash values returned by this function are the same as those returned by + * flow_hash_in_minimask(), only the form of the arguments differ. */ +uint32_t +miniflow_hash_in_minimask(const struct miniflow *flow, + const struct minimask *mask, uint32_t basis) +{ + const uint32_t *p = mask->masks.values; + uint32_t hash; + int i; + + hash = basis; + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + for (map = mask->masks.map[i]; map; map = zero_rightmost_1bit(map)) { + int ofs = raw_ctz(map) + i * 32; + + hash = mhash_add(hash, miniflow_get(flow, ofs) & *p); + p++; + } + } + + return mhash_finish(hash, p - mask->masks.values); +} + +/* Returns a hash value for the bits of 'flow' where there are 1-bits in + * 'mask', given 'basis'. + * + * The hash values returned by this function are the same as those returned by + * miniflow_hash_in_minimask(), only the form of the arguments differ. */ +uint32_t +flow_hash_in_minimask(const struct flow *flow, const struct minimask *mask, + uint32_t basis) +{ + const uint32_t *flow_u32 = (const uint32_t *) flow; + const uint32_t *p = mask->masks.values; + uint32_t hash; + int i; + + hash = basis; + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + for (map = mask->masks.map[i]; map; map = zero_rightmost_1bit(map)) { + int ofs = raw_ctz(map) + i * 32; + + hash = mhash_add(hash, flow_u32[ofs] & *p); + p++; + } + } + + return mhash_finish(hash, p - mask->masks.values); +} + +/* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' + * with minimask_destroy(). */ +void +minimask_init(struct minimask *mask, const struct flow_wildcards *wc) +{ + miniflow_init(&mask->masks, &wc->masks); +} + +/* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' + * with minimask_destroy(). */ +void +minimask_clone(struct minimask *dst, const struct minimask *src) +{ + miniflow_clone(&dst->masks, &src->masks); +} + +/* Initializes 'dst_' as the bit-wise "and" of 'a_' and 'b_'. + * + * The caller must provide room for FLOW_U32S "uint32_t"s in 'storage', for use + * by 'dst_'. The caller must *not* free 'dst_' with minimask_destroy(). */ +void +minimask_combine(struct minimask *dst_, + const struct minimask *a_, const struct minimask *b_, + uint32_t storage[FLOW_U32S]) +{ + struct miniflow *dst = &dst_->masks; + const struct miniflow *a = &a_->masks; + const struct miniflow *b = &b_->masks; + int i, n; + + n = 0; + dst->values = storage; + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + dst->map[i] = 0; + for (map = a->map[i] & b->map[i]; map; + map = zero_rightmost_1bit(map)) { + int ofs = raw_ctz(map) + i * 32; + uint32_t mask = miniflow_get(a, ofs) & miniflow_get(b, ofs); + + if (mask) { + dst->map[i] |= rightmost_1bit(map); + dst->values[n++] = mask; + } + } + } +} + +/* Frees any memory owned by 'mask'. Does not free the storage in which 'mask' + * itself resides; the caller is responsible for that. */ +void +minimask_destroy(struct minimask *mask) +{ + miniflow_destroy(&mask->masks); +} + +/* Initializes 'dst' as a copy of 'src'. */ +void +minimask_expand(const struct minimask *mask, struct flow_wildcards *wc) +{ + miniflow_expand(&mask->masks, &wc->masks); +} + +/* Returns the uint32_t that would be at byte offset '4 * u32_ofs' if 'mask' + * were expanded into a "struct flow_wildcards". */ +uint32_t +minimask_get(const struct minimask *mask, unsigned int u32_ofs) +{ + return miniflow_get(&mask->masks, u32_ofs); +} + +/* Returns the VID mask within the vlan_tci member of the "struct + * flow_wildcards" represented by 'mask'. */ +uint16_t +minimask_get_vid_mask(const struct minimask *mask) +{ + return miniflow_get_vid(&mask->masks); +} + +/* Returns true if 'a' and 'b' are the same flow mask, false otherwise. */ +bool +minimask_equal(const struct minimask *a, const struct minimask *b) +{ + return miniflow_equal(&a->masks, &b->masks); +} + +/* Returns a hash value for 'mask', given 'basis'. */ +uint32_t +minimask_hash(const struct minimask *mask, uint32_t basis) +{ + return miniflow_hash(&mask->masks, basis); +} + +/* Returns true if at least one bit is wildcarded in 'a_' but not in 'b_', + * false otherwise. */ +bool +minimask_has_extra(const struct minimask *a_, const struct minimask *b_) +{ + const struct miniflow *a = &a_->masks; + const struct miniflow *b = &b_->masks; + int i; + + for (i = 0; i < MINI_N_MAPS; i++) { + uint32_t map; + + for (map = a->map[i] | b->map[i]; map; + map = zero_rightmost_1bit(map)) { + int ofs = raw_ctz(map) + i * 32; + uint32_t a_u32 = miniflow_get(a, ofs); + uint32_t b_u32 = miniflow_get(b, ofs); + + if ((a_u32 & b_u32) != b_u32) { + return true; + } + } + } + + return false; +} + +/* Returns true if 'mask' matches every packet, false if 'mask' fixes any bits + * or fields. */ +bool +minimask_is_catchall(const struct minimask *mask_) +{ + const struct miniflow *mask = &mask_->masks; + + BUILD_ASSERT(MINI_N_MAPS == 2); + return !(mask->map[0] | mask->map[1]); +}