Oh forgot to mention. We should probably remove the FLOW_WC_SEQ build
assertions from a lot of these functions as they no longer need to
change when new fields are added.
Ethan
On Mon, Jul 30, 2012 at 6:42 PM, Ethan Jackson <et...@nicira.com> wrote:
> Looks good thanks.
>
> Ethan
>
> On Fri, Jul 20, 2012 at 4:25 PM, Ben Pfaff <b...@nicira.com> wrote:
>> Now that "struct flow" and "struct flow_wildcards" have the same simple
>> and uniform structure, it's easy to handle common operations by just
>> iterating over the bits inside them.
>>
>> Signed-off-by: Ben Pfaff <b...@nicira.com>
>> ---
>> lib/classifier.c | 71 ---------------
>> lib/flow.c | 262
>> +++++++++---------------------------------------------
>> lib/flow.h | 7 ++-
>> 3 files changed, 48 insertions(+), 292 deletions(-)
>>
>> diff --git a/lib/classifier.c b/lib/classifier.c
>> index 486b3d5..88c8e1a 100644
>> --- a/lib/classifier.c
>> +++ b/lib/classifier.c
>> @@ -40,9 +40,6 @@ static struct cls_rule *find_equal(struct cls_table *,
>> const struct flow *,
>> uint32_t hash);
>> static struct cls_rule *insert_rule(struct cls_table *, struct cls_rule *);
>>
>> -static bool flow_equal_except(const struct flow *, const struct flow *,
>> - const struct flow_wildcards *);
>> -
>> /* Iterates RULE over HEAD and all of the cls_rules on HEAD->list. */
>> #define FOR_EACH_RULE_IN_LIST(RULE, HEAD) \
>> for ((RULE) = (HEAD); (RULE) != NULL; (RULE) = next_rule_in_list(RULE))
>> @@ -1233,71 +1230,3 @@ next_rule_in_list(struct cls_rule *rule)
>> struct cls_rule *next = next_rule_in_list__(rule);
>> return next->priority < rule->priority ? next : NULL;
>> }
>> -
>> -static bool
>> -ipv6_equal_except(const struct in6_addr *a, const struct in6_addr *b,
>> - const struct in6_addr *mask)
>> -{
>> - int i;
>> -
>> -#ifdef s6_addr32
>> - for (i=0; i<4; i++) {
>> - if ((a->s6_addr32[i] ^ b->s6_addr32[i]) & mask->s6_addr32[i]) {
>> - return false;
>> - }
>> - }
>> -#else
>> - for (i=0; i<16; i++) {
>> - if ((a->s6_addr[i] ^ b->s6_addr[i]) & mask->s6_addr[i]) {
>> - return false;
>> - }
>> - }
>> -#endif
>> -
>> - return true;
>> -}
>> -
>> -
>> -static bool
>> -flow_equal_except(const struct flow *a, const struct flow *b,
>> - const struct flow_wildcards *wildcards)
>> -{
>> - int i;
>> -
>> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
>> -
>> - for (i = 0; i < FLOW_N_REGS; i++) {
>> - if ((a->regs[i] ^ b->regs[i]) & wildcards->masks.regs[i]) {
>> - return false;
>> - }
>> - }
>> -
>> - return (!((a->tun_id ^ b->tun_id) & wildcards->masks.tun_id)
>> - && !((a->metadata ^ b->metadata) & wildcards->masks.metadata)
>> - && !((a->nw_src ^ b->nw_src) & wildcards->masks.nw_src)
>> - && !((a->nw_dst ^ b->nw_dst) & wildcards->masks.nw_dst)
>> - && !((a->in_port ^ b->in_port) & wildcards->masks.in_port)
>> - && !((a->vlan_tci ^ b->vlan_tci) & wildcards->masks.vlan_tci)
>> - && !((a->dl_type ^ b->dl_type) & wildcards->masks.dl_type)
>> - && !((a->tp_src ^ b->tp_src) & wildcards->masks.tp_src)
>> - && !((a->tp_dst ^ b->tp_dst) & wildcards->masks.tp_dst)
>> - && eth_addr_equal_except(a->dl_src, b->dl_src,
>> - wildcards->masks.dl_src)
>> - && eth_addr_equal_except(a->dl_dst, b->dl_dst,
>> - wildcards->masks.dl_dst)
>> - && !((a->nw_proto ^ b->nw_proto) & wildcards->masks.nw_proto)
>> - && !((a->nw_ttl ^ b->nw_ttl) & wildcards->masks.nw_ttl)
>> - && !((a->nw_tos ^ b->nw_tos) & wildcards->masks.nw_tos)
>> - && !((a->nw_frag ^ b->nw_frag) & wildcards->masks.nw_frag)
>> - && eth_addr_equal_except(a->arp_sha, b->arp_sha,
>> - wildcards->masks.arp_sha)
>> - && eth_addr_equal_except(a->arp_tha, b->arp_tha,
>> - wildcards->masks.arp_tha)
>> - && !((a->ipv6_label ^ b->ipv6_label) &
>> wildcards->masks.ipv6_label)
>> - && ipv6_equal_except(&a->ipv6_src, &b->ipv6_src,
>> - &wildcards->masks.ipv6_src)
>> - && ipv6_equal_except(&a->ipv6_dst, &b->ipv6_dst,
>> - &wildcards->masks.ipv6_dst)
>> - && ipv6_equal_except(&a->nd_target, &b->nd_target,
>> - &wildcards->masks.nd_target));
>> -}
>> diff --git a/lib/flow.c b/lib/flow.c
>> index 6747add..a5076bb 100644
>> --- a/lib/flow.c
>> +++ b/lib/flow.c
>> @@ -441,38 +441,15 @@ 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)
>> {
>> - 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 == 17);
>>
>> - for (i = 0; i < FLOW_N_REGS; i++) {
>> - flow->regs[i] &= wildcards->masks.regs[i];
>> + for (i = 0; i < FLOW_U32S; i++) {
>> + flow_u32[i] &= wc_u32[i];
>> }
>> - flow->tun_id &= wildcards->masks.tun_id;
>> - flow->metadata &= wildcards->masks.metadata;
>> - flow->nw_src &= wildcards->masks.nw_src;
>> - flow->nw_dst &= wildcards->masks.nw_dst;
>> - flow->in_port &= wildcards->masks.in_port;
>> - flow->vlan_tci &= wildcards->masks.vlan_tci;
>> - flow->dl_type &= wildcards->masks.dl_type;
>> - flow->tp_src &= wildcards->masks.tp_src;
>> - flow->tp_dst &= wildcards->masks.tp_dst;
>> - eth_addr_bitand(flow->dl_src, wildcards->masks.dl_src, flow->dl_src);
>> - eth_addr_bitand(flow->dl_dst, wildcards->masks.dl_dst, flow->dl_dst);
>> - flow->ipv6_label &= wildcards->masks.ipv6_label;
>> - flow->nw_proto &= wildcards->masks.nw_proto;
>> - flow->nw_tos &= wildcards->masks.nw_tos;
>> - flow->nw_ttl &= wildcards->masks.nw_ttl;
>> - flow->nw_frag &= wildcards->masks.nw_frag;
>> - eth_addr_bitand(flow->arp_sha, wildcards->masks.arp_sha, flow->arp_sha);
>> - eth_addr_bitand(flow->arp_tha, wildcards->masks.arp_tha, flow->arp_tha);
>> - flow->ipv6_src = ipv6_addr_bitand(&flow->ipv6_src,
>> - &wildcards->masks.ipv6_src);
>> - flow->ipv6_dst = ipv6_addr_bitand(&flow->ipv6_dst,
>> - &wildcards->masks.ipv6_dst);
>> - flow->nd_target = ipv6_addr_bitand(&flow->nd_target,
>> - &wildcards->masks.nd_target);
>> - flow->skb_priority = 0;
>> }
>>
>> /* Initializes 'fmd' with the metadata found in 'flow'. */
>> @@ -575,29 +552,7 @@ flow_wildcards_init_catchall(struct flow_wildcards *wc)
>> {
>> BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
>>
>> - wc->masks.tun_id = htonll(0);
>> - wc->masks.nw_src = htonl(0);
>> - wc->masks.nw_dst = htonl(0);
>> - wc->masks.ipv6_src = in6addr_any;
>> - wc->masks.ipv6_dst = in6addr_any;
>> - wc->masks.ipv6_label = htonl(0);
>> - wc->masks.nd_target = in6addr_any;
>> - memset(wc->masks.regs, 0, sizeof wc->masks.regs);
>> - wc->masks.metadata = htonll(0);
>> - wc->masks.in_port = 0;
>> - wc->masks.vlan_tci = htons(0);
>> - wc->masks.nw_frag = 0;
>> - wc->masks.dl_type = htons(0);
>> - wc->masks.tp_src = htons(0);
>> - wc->masks.tp_dst = htons(0);
>> - memset(wc->masks.dl_src, 0, ETH_ADDR_LEN);
>> - memset(wc->masks.dl_dst, 0, ETH_ADDR_LEN);
>> - memset(wc->masks.arp_sha, 0, ETH_ADDR_LEN);
>> - memset(wc->masks.arp_tha, 0, ETH_ADDR_LEN);
>> - wc->masks.nw_proto = 0;
>> - wc->masks.nw_tos = 0;
>> - wc->masks.nw_ttl = 0;
>> - memset(wc->masks.zeros, 0, sizeof wc->masks.zeros);
>> + memset(&wc->masks, 0, sizeof wc->masks);
>> }
>>
>> /* Initializes 'wc' as an exact-match set of wildcards; that is, 'wc' does
>> not
>> @@ -607,28 +562,7 @@ flow_wildcards_init_exact(struct flow_wildcards *wc)
>> {
>> BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
>>
>> - wc->masks.tun_id = htonll(UINT64_MAX);
>> - wc->masks.nw_src = htonl(UINT32_MAX);
>> - wc->masks.nw_dst = htonl(UINT32_MAX);
>> - wc->masks.ipv6_src = in6addr_exact;
>> - wc->masks.ipv6_dst = in6addr_exact;
>> - wc->masks.ipv6_label = htonl(UINT32_MAX);
>> - wc->masks.nd_target = in6addr_exact;
>> - memset(wc->masks.regs, 0xff, sizeof wc->masks.regs);
>> - wc->masks.metadata = htonll(UINT64_MAX);
>> - wc->masks.in_port = UINT16_MAX;
>> - wc->masks.vlan_tci = htons(UINT16_MAX);
>> - wc->masks.nw_frag = UINT8_MAX;
>> - wc->masks.dl_type = htons(UINT16_MAX);
>> - wc->masks.tp_src = htons(UINT16_MAX);
>> - wc->masks.tp_dst = htons(UINT16_MAX);
>> - memset(wc->masks.dl_src, 0xff, ETH_ADDR_LEN);
>> - memset(wc->masks.dl_dst, 0xff, ETH_ADDR_LEN);
>> - memset(wc->masks.arp_sha, 0xff, ETH_ADDR_LEN);
>> - memset(wc->masks.arp_tha, 0xff, ETH_ADDR_LEN);
>> - wc->masks.nw_proto = UINT8_MAX;
>> - wc->masks.nw_tos = UINT8_MAX;
>> - wc->masks.nw_ttl = UINT8_MAX;
>> + memset(&wc->masks, 0xff, sizeof wc->masks);
>> memset(wc->masks.zeros, 0, sizeof wc->masks.zeros);
>> }
>>
>> @@ -637,40 +571,15 @@ flow_wildcards_init_exact(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 == 17);
>> -
>> - if (wc->masks.tun_id != htonll(0)
>> - || wc->masks.nw_src != htonl(0)
>> - || wc->masks.nw_dst != htonl(0)
>> - || wc->masks.tp_src != htons(0)
>> - || wc->masks.tp_dst != htons(0)
>> - || wc->masks.in_port != 0
>> - || wc->masks.vlan_tci != htons(0)
>> - || wc->masks.metadata != htonll(0)
>> - || wc->masks.dl_type != htons(0)
>> - || !eth_addr_is_zero(wc->masks.dl_src)
>> - || !eth_addr_is_zero(wc->masks.dl_dst)
>> - || !eth_addr_is_zero(wc->masks.arp_sha)
>> - || !eth_addr_is_zero(wc->masks.arp_tha)
>> - || !ipv6_mask_is_any(&wc->masks.ipv6_src)
>> - || !ipv6_mask_is_any(&wc->masks.ipv6_dst)
>> - || wc->masks.ipv6_label != htonl(0)
>> - || !ipv6_mask_is_any(&wc->masks.nd_target)
>> - || wc->masks.nw_proto != 0
>> - || wc->masks.nw_frag != 0
>> - || wc->masks.nw_tos != 0
>> - || wc->masks.nw_ttl != 0) {
>> - return false;
>> - }
>> -
>> - for (i = 0; i < FLOW_N_REGS; i++) {
>> - if (wc->masks.regs[i] != 0) {
>> + for (i = 0; i < FLOW_U32S; i++) {
>> + if (wc_u32[i]) {
>> return false;
>> }
>> }
>> -
>> return true;
>> }
>>
>> @@ -682,46 +591,23 @@ 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 == 17);
>>
>> - dst->masks.tun_id = src1->masks.tun_id & src2->masks.tun_id;
>> - dst->masks.nw_src = src1->masks.nw_src & src2->masks.nw_src;
>> - dst->masks.nw_dst = src1->masks.nw_dst & src2->masks.nw_dst;
>> - dst->masks.ipv6_src = ipv6_addr_bitand(&src1->masks.ipv6_src,
>> - &src2->masks.ipv6_src);
>> - dst->masks.ipv6_dst = ipv6_addr_bitand(&src1->masks.ipv6_dst,
>> - &src2->masks.ipv6_dst);
>> - dst->masks.ipv6_label = src1->masks.ipv6_label & src2->masks.ipv6_label;
>> - dst->masks.nd_target = ipv6_addr_bitand(&src1->masks.nd_target,
>> - &src2->masks.nd_target);
>> - for (i = 0; i < FLOW_N_REGS; i++) {
>> - dst->masks.regs[i] = src1->masks.regs[i] & src2->masks.regs[i];
>> + for (i = 0; i < FLOW_U32S; i++) {
>> + dst_u32[i] = src1_u32[i] & src2_u32[i];
>> }
>> - dst->masks.metadata = src1->masks.metadata & src2->masks.metadata;
>> - dst->masks.in_port = src1->masks.in_port & src2->masks.in_port;
>> - dst->masks.vlan_tci = src1->masks.vlan_tci & src2->masks.vlan_tci;
>> - dst->masks.dl_type = src1->masks.dl_type & src2->masks.dl_type;
>> - dst->masks.tp_src = src1->masks.tp_src & src2->masks.tp_src;
>> - dst->masks.tp_dst = src1->masks.tp_dst & src2->masks.tp_dst;
>> - dst->masks.nw_frag = src1->masks.nw_frag & src2->masks.nw_frag;
>> - eth_addr_bitand(src1->masks.dl_src, src2->masks.dl_src,
>> dst->masks.dl_src);
>> - eth_addr_bitand(src1->masks.dl_dst, src2->masks.dl_dst,
>> dst->masks.dl_dst);
>> - eth_addr_bitand(src1->masks.arp_sha, src2->masks.arp_sha,
>> - dst->masks.arp_sha);
>> - eth_addr_bitand(src1->masks.arp_tha, src2->masks.arp_tha,
>> - dst->masks.arp_tha);
>> - dst->masks.nw_proto = src1->masks.nw_proto & src2->masks.nw_proto;
>> - dst->masks.nw_tos = src1->masks.nw_tos & src2->masks.nw_tos;
>> - dst->masks.nw_ttl = src1->masks.nw_ttl & src2->masks.nw_ttl;
>> }
>>
>> /* Returns a hash of the wildcards in 'wc'. */
>> uint32_t
>> flow_wildcards_hash(const struct flow_wildcards *wc, uint32_t basis)
>> {
>> - return hash_words((const uint32_t *) wc, sizeof *wc / 4, basis);
>> + return flow_hash(&wc->masks, basis);;
>> }
>>
>> /* Returns true if 'a' and 'b' represent the same wildcards, false if they
>> are
>> @@ -730,41 +616,7 @@ bool
>> flow_wildcards_equal(const struct flow_wildcards *a,
>> const struct flow_wildcards *b)
>> {
>> - int i;
>> -
>> - BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
>> -
>> - if (a->masks.tun_id != b->masks.tun_id
>> - || a->masks.nw_src != b->masks.nw_src
>> - || a->masks.nw_dst != b->masks.nw_dst
>> - || a->masks.in_port != b->masks.in_port
>> - || a->masks.vlan_tci != b->masks.vlan_tci
>> - || a->masks.metadata != b->masks.metadata
>> - || a->masks.dl_type != b->masks.dl_type
>> - || !ipv6_addr_equals(&a->masks.ipv6_src, &b->masks.ipv6_src)
>> - || !ipv6_addr_equals(&a->masks.ipv6_dst, &b->masks.ipv6_dst)
>> - || a->masks.ipv6_label != b->masks.ipv6_label
>> - || !ipv6_addr_equals(&a->masks.nd_target, &b->masks.nd_target)
>> - || a->masks.tp_src != b->masks.tp_src
>> - || a->masks.tp_dst != b->masks.tp_dst
>> - || a->masks.nw_frag != b->masks.nw_frag
>> - || !eth_addr_equals(a->masks.dl_src, b->masks.dl_src)
>> - || !eth_addr_equals(a->masks.dl_dst, b->masks.dl_dst)
>> - || !eth_addr_equals(a->masks.arp_sha, b->masks.arp_sha)
>> - || !eth_addr_equals(a->masks.arp_tha, b->masks.arp_tha)
>> - || a->masks.nw_proto != b->masks.nw_proto
>> - || a->masks.nw_tos != b->masks.nw_tos
>> - || a->masks.nw_ttl != b->masks.nw_ttl) {
>> - return false;
>> - }
>> -
>> - for (i = 0; i < FLOW_N_REGS; i++) {
>> - if (a->masks.regs[i] != b->masks.regs[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
>> @@ -773,69 +625,39 @@ 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 == 17);
>>
>> - for (i = 0; i < FLOW_N_REGS; i++) {
>> - if ((a->masks.regs[i] & b->masks.regs[i]) != b->masks.regs[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->masks.dl_src, b->masks.dl_src, eth_masked);
>> - if (!eth_addr_equals(eth_masked, b->masks.dl_src)) {
>> - return true;
>> - }
>> -
>> - eth_addr_bitand(a->masks.dl_dst, b->masks.dl_dst, eth_masked);
>> - if (!eth_addr_equals(eth_masked, b->masks.dl_dst)) {
>> - return true;
>> - }
>> -
>> - eth_addr_bitand(a->masks.arp_sha, b->masks.arp_sha, eth_masked);
>> - if (!eth_addr_equals(eth_masked, b->masks.arp_sha)) {
>> - return true;
>> - }
>> -
>> - eth_addr_bitand(a->masks.arp_tha, b->masks.arp_tha, eth_masked);
>> - if (!eth_addr_equals(eth_masked, b->masks.arp_tha)) {
>> - return true;
>> - }
>> -
>> - ipv6_masked = ipv6_addr_bitand(&a->masks.ipv6_src, &b->masks.ipv6_src);
>> - if (!ipv6_addr_equals(&ipv6_masked, &b->masks.ipv6_src)) {
>> - 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->masks.ipv6_dst, &b->masks.ipv6_dst);
>> - if (!ipv6_addr_equals(&ipv6_masked, &b->masks.ipv6_dst)) {
>> - return true;
>> - }
>> + BUILD_ASSERT_DECL(FLOW_WC_SEQ == 17);
>>
>> - ipv6_masked = ipv6_addr_bitand(&a->masks.nd_target,
>> &b->masks.nd_target);
>> - if (!ipv6_addr_equals(&ipv6_masked, &b->masks.nd_target)) {
>> - return true;
>> + for (i = 0; i < FLOW_U32S; i++) {
>> + if ((a_u32[i] ^ b_u32[i]) & wc_u32[i]) {
>> + return false;
>> + }
>> }
>> -
>> - return ((a->masks.tun_id & b->masks.tun_id) != b->masks.tun_id
>> - || (a->masks.nw_src & b->masks.nw_src) != b->masks.nw_src
>> - || (a->masks.nw_dst & b->masks.nw_dst) != b->masks.nw_dst
>> - || ((a->masks.ipv6_label & b->masks.ipv6_label)
>> - != b->masks.ipv6_label)
>> - || (a->masks.in_port & b->masks.in_port) != b->masks.in_port
>> - || (a->masks.vlan_tci & b->masks.vlan_tci) != b->masks.vlan_tci
>> - || (a->masks.metadata & b->masks.metadata) != b->masks.metadata
>> - || (a->masks.dl_type & b->masks.dl_type) != b->masks.dl_type
>> - || (a->masks.dl_type & b->masks.dl_type) != b->masks.dl_type
>> - || (a->masks.tp_src & b->masks.tp_src) != b->masks.tp_src
>> - || (a->masks.tp_dst & b->masks.tp_dst) != b->masks.tp_dst
>> - || (a->masks.nw_proto & b->masks.nw_proto) != b->masks.nw_proto
>> - || (a->masks.nw_frag & b->masks.nw_frag) != b->masks.nw_frag
>> - || (a->masks.nw_tos & b->masks.nw_tos) != b->masks.nw_tos
>> - || (a->masks.nw_ttl & b->masks.nw_ttl) != b->masks.nw_ttl);
>> + return true;
>> }
>>
>> /* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'.
>> diff --git a/lib/flow.h b/lib/flow.h
>> index 5f248fc..d8680c0 100644
>> --- a/lib/flow.h
>> +++ b/lib/flow.h
>> @@ -79,6 +79,8 @@ struct flow {
>> };
>> BUILD_ASSERT_DECL(sizeof(struct flow) % 8 == 0);
>>
>> +#define FLOW_U32S (sizeof(struct flow) / 4)
>> +
>> /* Remember to update FLOW_WC_SEQ when changing 'struct flow'. */
>> BUILD_ASSERT_DECL(sizeof(struct flow) == 152 && FLOW_WC_SEQ == 17);
>>
>> @@ -132,7 +134,7 @@ flow_hash(const struct flow *flow, uint32_t basis)
>> {
>> return hash_words((const uint32_t *) flow, sizeof *flow / 4, basis);
>> }
>> -
>> +
>> /* Wildcards for a flow.
>> *
>> * A 1-bit in each bit in 'masks' indicates that the corresponding bit of
>> @@ -166,4 +168,7 @@ uint32_t flow_hash_fields(const struct flow *, enum
>> nx_hash_fields,
>> const char *flow_hash_fields_to_str(enum nx_hash_fields);
>> bool flow_hash_fields_valid(enum nx_hash_fields);
>>
>> +bool flow_equal_except(const struct flow *a, const struct flow *b,
>> + const struct flow_wildcards *);
>> +
>> #endif /* flow.h */
>> --
>> 1.7.2.5
>>
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