X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fmatch.c;h=308f90627c289dd939d46e24f77e90c27a93db0c;hb=27bbe15dec4e1862396b5c4d265f0ced71b49930;hp=91c05a764d63be3ade32d628647f3d7823d97013;hpb=eb19e5f0781cdf3caec1a0ba172fcaf32da5e481;p=sliver-openvswitch.git diff --git a/lib/match.c b/lib/match.c index 91c05a764..308f90627 100644 --- a/lib/match.c +++ b/lib/match.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc. + * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -21,10 +21,6 @@ #include "dynamic-string.h" #include "ofp-util.h" #include "packets.h" -#include "vlog.h" - -VLOG_DEFINE_THIS_MODULE(match); - /* Converts the flow in 'flow' into a match in 'match', with the given * 'wildcards'. */ @@ -60,8 +56,8 @@ match_wc_init(struct match *match, const struct flow *flow) memset(&wc->masks.skb_priority, 0xff, sizeof wc->masks.skb_priority); } - if (flow->skb_mark) { - memset(&wc->masks.skb_mark, 0xff, sizeof wc->masks.skb_mark); + if (flow->pkt_mark) { + memset(&wc->masks.pkt_mark, 0xff, sizeof wc->masks.pkt_mark); } for (i = 0; i < FLOW_N_REGS; i++) { @@ -99,7 +95,14 @@ match_wc_init(struct match *match, const struct flow *flow) memset(&wc->masks.nw_src, 0xff, sizeof wc->masks.nw_src); memset(&wc->masks.nw_dst, 0xff, sizeof wc->masks.nw_dst); } else if (eth_type_mpls(flow->dl_type)) { - memset(&wc->masks.mpls_lse, 0xff, sizeof wc->masks.mpls_lse); + int i; + + for (i = 0; i < FLOW_MAX_MPLS_LABELS; i++) { + wc->masks.mpls_lse[i] = OVS_BE32_MAX; + if (flow->mpls_lse[i] & htonl(MPLS_BOS_MASK)) { + break; + } + } } if (flow->dl_type == htons(ETH_TYPE_ARP) || @@ -114,6 +117,10 @@ match_wc_init(struct match *match, const struct flow *flow) if (flow->nw_frag) { memset(&wc->masks.nw_frag, 0xff, sizeof wc->masks.nw_frag); + if (flow->nw_frag & FLOW_NW_FRAG_LATER) { + /* No transport layer header in later fragments. */ + return; + } } if (flow->nw_proto == IPPROTO_ICMP || @@ -122,6 +129,9 @@ match_wc_init(struct match *match, const struct flow *flow) memset(&wc->masks.tp_src, 0xff, sizeof wc->masks.tp_src); memset(&wc->masks.tp_dst, 0xff, sizeof wc->masks.tp_dst); } + if (flow->nw_proto == IPPROTO_TCP) { + memset(&wc->masks.tcp_flags, 0xff, sizeof wc->masks.tcp_flags); + } if (flow->nw_proto == IPPROTO_ICMPV6) { memset(&wc->masks.arp_sha, 0xff, sizeof wc->masks.arp_sha); @@ -132,16 +142,6 @@ match_wc_init(struct match *match, const struct flow *flow) return; } -/* Converts the flow in 'flow' into an exact-match match in 'match'. */ -void -match_init_exact(struct match *match, const struct flow *flow) -{ - match->flow = *flow; - match->flow.skb_priority = 0; - match->flow.skb_mark = 0; - flow_wildcards_init_exact(&match->wc); -} - /* Initializes 'match' as a "catch-all" match that matches every packet. */ void match_init_catchall(struct match *match) @@ -164,6 +164,26 @@ match_zero_wildcarded_fields(struct match *match) flow_zero_wildcards(&match->flow, &match->wc); } +void +match_set_dp_hash(struct match *match, uint32_t value) +{ + match_set_dp_hash_masked(match, value, UINT32_MAX); +} + +void +match_set_dp_hash_masked(struct match *match, uint32_t value, uint32_t mask) +{ + match->wc.masks.dp_hash = mask; + match->flow.dp_hash = value & mask; +} + +void +match_set_recirc_id(struct match *match, uint32_t value) +{ + match->flow.recirc_id = value; + match->wc.masks.recirc_id = UINT32_MAX; +} + void match_set_reg(struct match *match, unsigned int reg_idx, uint32_t value) { @@ -182,7 +202,7 @@ match_set_reg_masked(struct match *match, unsigned int reg_idx, void match_set_metadata(struct match *match, ovs_be64 metadata) { - match_set_metadata_masked(match, metadata, htonll(UINT64_MAX)); + match_set_metadata_masked(match, metadata, OVS_BE64_MAX); } void @@ -196,7 +216,7 @@ match_set_metadata_masked(struct match *match, void match_set_tun_id(struct match *match, ovs_be64 tun_id) { - match_set_tun_id_masked(match, tun_id, htonll(UINT64_MAX)); + match_set_tun_id_masked(match, tun_id, OVS_BE64_MAX); } void @@ -209,7 +229,7 @@ match_set_tun_id_masked(struct match *match, ovs_be64 tun_id, ovs_be64 mask) void match_set_tun_src(struct match *match, ovs_be32 src) { - match_set_tun_src_masked(match, src, htonl(UINT32_MAX)); + match_set_tun_src_masked(match, src, OVS_BE32_MAX); } void @@ -222,7 +242,7 @@ match_set_tun_src_masked(struct match *match, ovs_be32 src, ovs_be32 mask) void match_set_tun_dst(struct match *match, ovs_be32 dst) { - match_set_tun_dst_masked(match, dst, htonl(UINT32_MAX)); + match_set_tun_dst_masked(match, dst, OVS_BE32_MAX); } void @@ -286,16 +306,22 @@ match_set_skb_priority(struct match *match, uint32_t skb_priority) } void -match_set_skb_mark(struct match *match, uint32_t skb_mark) +match_set_pkt_mark(struct match *match, uint32_t pkt_mark) +{ + match_set_pkt_mark_masked(match, pkt_mark, UINT32_MAX); +} + +void +match_set_pkt_mark_masked(struct match *match, uint32_t pkt_mark, uint32_t mask) { - match->wc.masks.skb_mark = UINT32_MAX; - match->flow.skb_mark = skb_mark; + match->flow.pkt_mark = pkt_mark & mask; + match->wc.masks.pkt_mark = mask; } void match_set_dl_type(struct match *match, ovs_be16 dl_type) { - match->wc.masks.dl_type = htons(UINT16_MAX); + match->wc.masks.dl_type = OVS_BE16_MAX; match->flow.dl_type = dl_type; } @@ -406,7 +432,7 @@ match_set_dl_vlan(struct match *match, ovs_be16 dl_vlan) { flow_set_dl_vlan(&match->flow, dl_vlan); if (dl_vlan == htons(OFP10_VLAN_NONE)) { - match->wc.masks.vlan_tci = htons(UINT16_MAX); + match->wc.masks.vlan_tci = OVS_BE16_MAX; } else { match->wc.masks.vlan_tci |= htons(VLAN_VID_MASK | VLAN_CFI); } @@ -459,61 +485,77 @@ match_set_dl_vlan_pcp(struct match *match, uint8_t dl_vlan_pcp) match->wc.masks.vlan_tci |= htons(VLAN_CFI | VLAN_PCP_MASK); } +/* Modifies 'match' so that the MPLS label 'idx' matches 'lse' exactly. */ +void +match_set_mpls_lse(struct match *match, int idx, ovs_be32 lse) +{ + match->wc.masks.mpls_lse[idx] = OVS_BE32_MAX; + match->flow.mpls_lse[idx] = lse; +} + /* Modifies 'match' so that the MPLS label is wildcarded. */ void -match_set_any_mpls_label(struct match *match) +match_set_any_mpls_label(struct match *match, int idx) { - match->wc.masks.mpls_lse &= ~htonl(MPLS_LABEL_MASK); - flow_set_mpls_label(&match->flow, htonl(0)); + match->wc.masks.mpls_lse[idx] &= ~htonl(MPLS_LABEL_MASK); + flow_set_mpls_label(&match->flow, idx, htonl(0)); } /* Modifies 'match' so that it matches only packets with an MPLS header whose * label equals the low 20 bits of 'mpls_label'. */ void -match_set_mpls_label(struct match *match, ovs_be32 mpls_label) +match_set_mpls_label(struct match *match, int idx, ovs_be32 mpls_label) { - match->wc.masks.mpls_lse |= htonl(MPLS_LABEL_MASK); - flow_set_mpls_label(&match->flow, mpls_label); + match->wc.masks.mpls_lse[idx] |= htonl(MPLS_LABEL_MASK); + flow_set_mpls_label(&match->flow, idx, mpls_label); } /* Modifies 'match' so that the MPLS TC is wildcarded. */ void -match_set_any_mpls_tc(struct match *match) +match_set_any_mpls_tc(struct match *match, int idx) { - match->wc.masks.mpls_lse &= ~htonl(MPLS_TC_MASK); - flow_set_mpls_tc(&match->flow, 0); + match->wc.masks.mpls_lse[idx] &= ~htonl(MPLS_TC_MASK); + flow_set_mpls_tc(&match->flow, idx, 0); } /* Modifies 'match' so that it matches only packets with an MPLS header whose * Traffic Class equals the low 3 bits of 'mpls_tc'. */ void -match_set_mpls_tc(struct match *match, uint8_t mpls_tc) +match_set_mpls_tc(struct match *match, int idx, uint8_t mpls_tc) { - match->wc.masks.mpls_lse |= htonl(MPLS_TC_MASK); - flow_set_mpls_tc(&match->flow, mpls_tc); + match->wc.masks.mpls_lse[idx] |= htonl(MPLS_TC_MASK); + flow_set_mpls_tc(&match->flow, idx, mpls_tc); } /* Modifies 'match' so that the MPLS stack flag is wildcarded. */ void -match_set_any_mpls_bos(struct match *match) +match_set_any_mpls_bos(struct match *match, int idx) { - match->wc.masks.mpls_lse &= ~htonl(MPLS_BOS_MASK); - flow_set_mpls_bos(&match->flow, 0); + match->wc.masks.mpls_lse[idx] &= ~htonl(MPLS_BOS_MASK); + flow_set_mpls_bos(&match->flow, idx, 0); } /* Modifies 'match' so that it matches only packets with an MPLS header whose * Stack Flag equals the lower bit of 'mpls_bos' */ void -match_set_mpls_bos(struct match *match, uint8_t mpls_bos) +match_set_mpls_bos(struct match *match, int idx, uint8_t mpls_bos) +{ + match->wc.masks.mpls_lse[idx] |= htonl(MPLS_BOS_MASK); + flow_set_mpls_bos(&match->flow, idx, mpls_bos); +} + +/* Modifies 'match' so that the MPLS LSE is wildcarded. */ +void +match_set_any_mpls_lse(struct match *match, int idx) { - match->wc.masks.mpls_lse |= htonl(MPLS_BOS_MASK); - flow_set_mpls_bos(&match->flow, mpls_bos); + match->wc.masks.mpls_lse[idx] = htonl(0); + flow_set_mpls_lse(&match->flow, idx, htonl(0)); } void match_set_tp_src(struct match *match, ovs_be16 tp_src) { - match_set_tp_src_masked(match, tp_src, htons(UINT16_MAX)); + match_set_tp_src_masked(match, tp_src, OVS_BE16_MAX); } void @@ -526,7 +568,7 @@ match_set_tp_src_masked(struct match *match, ovs_be16 port, ovs_be16 mask) void match_set_tp_dst(struct match *match, ovs_be16 tp_dst) { - match_set_tp_dst_masked(match, tp_dst, htons(UINT16_MAX)); + match_set_tp_dst_masked(match, tp_dst, OVS_BE16_MAX); } void @@ -536,6 +578,19 @@ match_set_tp_dst_masked(struct match *match, ovs_be16 port, ovs_be16 mask) match->wc.masks.tp_dst = mask; } +void +match_set_tcp_flags(struct match *match, ovs_be16 flags) +{ + match_set_tcp_flags_masked(match, flags, OVS_BE16_MAX); +} + +void +match_set_tcp_flags_masked(struct match *match, ovs_be16 flags, ovs_be16 mask) +{ + match->flow.tcp_flags = flags & mask; + match->wc.masks.tcp_flags = mask; +} + void match_set_nw_proto(struct match *match, uint8_t nw_proto) { @@ -547,7 +602,7 @@ void match_set_nw_src(struct match *match, ovs_be32 nw_src) { match->flow.nw_src = nw_src; - match->wc.masks.nw_src = htonl(UINT32_MAX); + match->wc.masks.nw_src = OVS_BE32_MAX; } void @@ -562,7 +617,7 @@ void match_set_nw_dst(struct match *match, ovs_be32 nw_dst) { match->flow.nw_dst = nw_dst; - match->wc.masks.nw_dst = htonl(UINT32_MAX); + match->wc.masks.nw_dst = OVS_BE32_MAX; } void @@ -687,7 +742,7 @@ match_set_ipv6_dst_masked(struct match *match, const struct in6_addr *dst, void match_set_ipv6_label(struct match *match, ovs_be32 ipv6_label) { - match->wc.masks.ipv6_label = htonl(UINT32_MAX); + match->wc.masks.ipv6_label = OVS_BE32_MAX; match->flow.ipv6_label = ipv6_label; } @@ -733,6 +788,34 @@ match_hash(const struct match *match, uint32_t basis) return flow_wildcards_hash(&match->wc, flow_hash(&match->flow, basis)); } +static bool +match_has_default_recirc_id(const struct match *m) +{ + return m->flow.recirc_id == 0 && (m->wc.masks.recirc_id == UINT32_MAX || + m->wc.masks.recirc_id == 0); +} + +static bool +match_has_default_dp_hash(const struct match *m) +{ + return ((m->flow.dp_hash | m->wc.masks.dp_hash) == 0); +} + +/* Return true if the hidden fields of the match are set to the default values. + * The default values equals to those set up by match_init_hidden_fields(). */ +bool +match_has_default_hidden_fields(const struct match *m) +{ + return match_has_default_recirc_id(m) && match_has_default_dp_hash(m); +} + +void +match_init_hidden_fields(struct match *m) +{ + match_set_recirc_id(m, 0); + match_set_dp_hash_masked(m, 0, 0); +} + static void format_eth_masked(struct ds *s, const char *name, const uint8_t eth[6], const uint8_t mask[6]) @@ -767,14 +850,13 @@ format_ipv6_netmask(struct ds *s, const char *name, } } - static void format_be16_masked(struct ds *s, const char *name, ovs_be16 value, ovs_be16 mask) { if (mask != htons(0)) { ds_put_format(s, "%s=", name); - if (mask == htons(UINT16_MAX)) { + if (mask == OVS_BE16_MAX) { ds_put_format(s, "%"PRIu16, ntohs(value)); } else { ds_put_format(s, "0x%"PRIx16"/0x%"PRIx16, @@ -784,24 +866,55 @@ format_be16_masked(struct ds *s, const char *name, } } +static void +format_be32_masked(struct ds *s, const char *name, + ovs_be32 value, ovs_be32 mask) +{ + if (mask != htonl(0)) { + ds_put_format(s, "%s=", name); + if (mask == OVS_BE32_MAX) { + ds_put_format(s, "%"PRIu32, ntohl(value)); + } else { + ds_put_format(s, "0x%"PRIx32"/0x%"PRIx32, + ntohl(value), ntohl(mask)); + } + ds_put_char(s, ','); + } +} + +static void +format_uint32_masked(struct ds *s, const char *name, + uint32_t value, uint32_t mask) +{ + if (mask) { + ds_put_format(s, "%s=%#"PRIx32, name, value); + if (mask != UINT32_MAX) { + ds_put_format(s, "/%#"PRIx32, mask); + } + ds_put_char(s, ','); + } +} + +static void +format_be64_masked(struct ds *s, const char *name, + ovs_be64 value, ovs_be64 mask) +{ + if (mask != htonll(0)) { + ds_put_format(s, "%s=%#"PRIx64, name, ntohll(value)); + if (mask != OVS_BE64_MAX) { + ds_put_format(s, "/%#"PRIx64, ntohll(mask)); + } + ds_put_char(s, ','); + } +} + static void format_flow_tunnel(struct ds *s, const struct match *match) { const struct flow_wildcards *wc = &match->wc; const struct flow_tnl *tnl = &match->flow.tunnel; - switch (wc->masks.tunnel.tun_id) { - case 0: - break; - case CONSTANT_HTONLL(UINT64_MAX): - ds_put_format(s, "tun_id=%#"PRIx64",", ntohll(tnl->tun_id)); - break; - default: - ds_put_format(s, "tun_id=%#"PRIx64"/%#"PRIx64",", - ntohll(tnl->tun_id), - ntohll(wc->masks.tunnel.tun_id)); - break; - } + format_be64_masked(s, "tun_id", tnl->tun_id, wc->masks.tunnel.tun_id); format_ip_netmask(s, "tun_src", tnl->ip_src, wc->masks.tunnel.ip_src); format_ip_netmask(s, "tun_dst", tnl->ip_dst, wc->masks.tunnel.ip_dst); @@ -830,14 +943,22 @@ match_format(const struct match *match, struct ds *s, unsigned int priority) int i; - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 20); + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 26); if (priority != OFP_DEFAULT_PRIORITY) { ds_put_format(s, "priority=%u,", priority); } - if (wc->masks.skb_mark) { - ds_put_format(s, "skb_mark=%#"PRIx32",", f->skb_mark); + format_uint32_masked(s, "pkt_mark", f->pkt_mark, wc->masks.pkt_mark); + + if (wc->masks.recirc_id) { + format_uint32_masked(s, "recirc_id", f->recirc_id, + wc->masks.recirc_id); + } + + if (f->dp_hash && wc->masks.dp_hash) { + format_uint32_masked(s, "dp_hash", f->dp_hash, + wc->masks.dp_hash); } if (wc->masks.skb_priority) { @@ -855,6 +976,8 @@ match_format(const struct match *match, struct ds *s, unsigned int priority) ds_put_cstr(s, "tcp,"); } else if (f->nw_proto == IPPROTO_UDP) { ds_put_cstr(s, "udp,"); + } else if (f->nw_proto == IPPROTO_SCTP) { + ds_put_cstr(s, "sctp,"); } else { ds_put_cstr(s, "ip,"); skip_proto = false; @@ -871,6 +994,8 @@ match_format(const struct match *match, struct ds *s, unsigned int priority) ds_put_cstr(s, "tcp6,"); } else if (f->nw_proto == IPPROTO_UDP) { ds_put_cstr(s, "udp6,"); + } else if (f->nw_proto == IPPROTO_SCTP) { + ds_put_cstr(s, "sctp6,"); } else { ds_put_cstr(s, "ipv6,"); skip_proto = false; @@ -891,32 +1016,18 @@ match_format(const struct match *match, struct ds *s, unsigned int priority) } } for (i = 0; i < FLOW_N_REGS; i++) { - switch (wc->masks.regs[i]) { - case 0: - break; - case UINT32_MAX: - ds_put_format(s, "reg%d=0x%"PRIx32",", i, f->regs[i]); - break; - default: - ds_put_format(s, "reg%d=0x%"PRIx32"/0x%"PRIx32",", - i, f->regs[i], wc->masks.regs[i]); - break; + #define REGNAME_LEN 20 + char regname[REGNAME_LEN]; + if (snprintf(regname, REGNAME_LEN, "reg%d", i) >= REGNAME_LEN) { + strcpy(regname, "reg?"); } + format_uint32_masked(s, regname, f->regs[i], wc->masks.regs[i]); } format_flow_tunnel(s, match); - switch (wc->masks.metadata) { - case 0: - break; - case CONSTANT_HTONLL(UINT64_MAX): - ds_put_format(s, "metadata=%#"PRIx64",", ntohll(f->metadata)); - break; - default: - ds_put_format(s, "metadata=%#"PRIx64"/%#"PRIx64",", - ntohll(f->metadata), ntohll(wc->masks.metadata)); - break; - } + format_be64_masked(s, "metadata", f->metadata, wc->masks.metadata); + if (wc->masks.in_port.ofp_port) { ds_put_cstr(s, "in_port="); ofputil_format_port(f->in_port.ofp_port, s); @@ -955,7 +1066,7 @@ match_format(const struct match *match, struct ds *s, unsigned int priority) format_ipv6_netmask(s, "ipv6_src", &f->ipv6_src, &wc->masks.ipv6_src); format_ipv6_netmask(s, "ipv6_dst", &f->ipv6_dst, &wc->masks.ipv6_dst); if (wc->masks.ipv6_label) { - if (wc->masks.ipv6_label == htonl(UINT32_MAX)) { + if (wc->masks.ipv6_label == OVS_BE32_MAX) { ds_put_format(s, "ipv6_label=0x%05"PRIx32",", ntohl(f->ipv6_label)); } else { @@ -994,22 +1105,25 @@ match_format(const struct match *match, struct ds *s, unsigned int priority) if (wc->masks.nw_ttl) { ds_put_format(s, "nw_ttl=%"PRIu8",", f->nw_ttl); } - if (wc->masks.mpls_lse & htonl(MPLS_LABEL_MASK)) { + if (wc->masks.mpls_lse[0] & htonl(MPLS_LABEL_MASK)) { ds_put_format(s, "mpls_label=%"PRIu32",", - mpls_lse_to_label(f->mpls_lse)); + mpls_lse_to_label(f->mpls_lse[0])); } - if (wc->masks.mpls_lse & htonl(MPLS_TC_MASK)) { + if (wc->masks.mpls_lse[0] & htonl(MPLS_TC_MASK)) { ds_put_format(s, "mpls_tc=%"PRIu8",", - mpls_lse_to_tc(f->mpls_lse)); + mpls_lse_to_tc(f->mpls_lse[0])); } - if (wc->masks.mpls_lse & htonl(MPLS_TTL_MASK)) { + if (wc->masks.mpls_lse[0] & htonl(MPLS_TTL_MASK)) { ds_put_format(s, "mpls_ttl=%"PRIu8",", - mpls_lse_to_ttl(f->mpls_lse)); + mpls_lse_to_ttl(f->mpls_lse[0])); } - if (wc->masks.mpls_lse & htonl(MPLS_BOS_MASK)) { + if (wc->masks.mpls_lse[0] & htonl(MPLS_BOS_MASK)) { ds_put_format(s, "mpls_bos=%"PRIu8",", - mpls_lse_to_bos(f->mpls_lse)); + mpls_lse_to_bos(f->mpls_lse[0])); } + format_be32_masked(s, "mpls_lse1", f->mpls_lse[1], wc->masks.mpls_lse[1]); + format_be32_masked(s, "mpls_lse2", f->mpls_lse[2], wc->masks.mpls_lse[2]); + switch (wc->masks.nw_frag) { case FLOW_NW_FRAG_ANY | FLOW_NW_FRAG_LATER: ds_put_format(s, "nw_frag=%s,", @@ -1044,6 +1158,15 @@ match_format(const struct match *match, struct ds *s, unsigned int priority) format_be16_masked(s, "tp_src", f->tp_src, wc->masks.tp_src); format_be16_masked(s, "tp_dst", f->tp_dst, wc->masks.tp_dst); } + if (is_ip_any(f) && f->nw_proto == IPPROTO_TCP && wc->masks.tcp_flags) { + uint16_t mask = TCP_FLAGS(wc->masks.tcp_flags); + if (mask == TCP_FLAGS(OVS_BE16_MAX)) { + ds_put_format(s, "tcp_flags=0x%03"PRIx16",", ntohs(f->tcp_flags)); + } else { + format_flags_masked(s, "tcp_flags", packet_tcp_flag_to_string, + ntohs(f->tcp_flags), mask); + } + } if (s->length > start_len && ds_last(s) == ',') { s->length--; @@ -1074,8 +1197,8 @@ match_print(const struct match *match) void minimatch_init(struct minimatch *dst, const struct match *src) { - miniflow_init(&dst->flow, &src->flow); minimask_init(&dst->mask, &src->wc); + miniflow_init_with_minimask(&dst->flow, &src->flow, &dst->mask); } /* Initializes 'dst' as a copy of 'src'. The caller must eventually free 'dst' @@ -1087,6 +1210,15 @@ minimatch_clone(struct minimatch *dst, const struct minimatch *src) minimask_clone(&dst->mask, &src->mask); } +/* Initializes 'dst' with the data in 'src', destroying 'src'. The caller must + * eventually free 'dst' with minimatch_destroy(). */ +void +minimatch_move(struct minimatch *dst, struct minimatch *src) +{ + miniflow_move(&dst->flow, &src->flow); + minimask_move(&dst->mask, &src->mask); +} + /* Frees any memory owned by 'match'. Does not free the storage in which * 'match' itself resides; the caller is responsible for that. */ void @@ -1112,11 +1244,28 @@ minimatch_equal(const struct minimatch *a, const struct minimatch *b) && minimask_equal(&a->mask, &b->mask)); } -/* Returns a hash value for 'match', given 'basis'. */ -uint32_t -minimatch_hash(const struct minimatch *match, uint32_t basis) +/* Returns true if 'target' satisifies 'match', that is, if each bit for which + * 'match' specifies a particular value has the correct value in 'target'. + * + * This function is equivalent to miniflow_equal_flow_in_minimask(&match->flow, + * target, &match->mask) but it is faster because of the invariant that + * match->flow.map and match->mask.map are the same. */ +bool +minimatch_matches_flow(const struct minimatch *match, + const struct flow *target) { - return miniflow_hash(&match->flow, minimask_hash(&match->mask, basis)); + const uint32_t *target_u32 = (const uint32_t *) target; + const uint32_t *flowp = miniflow_get_u32_values(&match->flow); + const uint32_t *maskp = miniflow_get_u32_values(&match->mask.masks); + uint64_t map; + + for (map = match->flow.map; map; map = zero_rightmost_1bit(map)) { + if ((*flowp++ ^ target_u32[raw_ctz(map)]) & *maskp++) { + return false; + } + } + + return true; } /* Appends a string representation of 'match' to 's'. If 'priority' is