}
/* Extract 'flow' with 'wildcards' into the OpenFlow match structure
- * 'match'. */
+ * 'match'. 'flow_format' should be one of NXFF_*. */
void
flow_to_match(const struct flow *flow, uint32_t wildcards,
- bool tun_id_from_cookie, struct ofp_match *match)
+ int flow_format, struct ofp_match *match)
{
- if (!tun_id_from_cookie) {
- wildcards &= OFPFW_ALL;
- }
+ wildcards &= (flow_format == NXFF_TUN_ID_FROM_COOKIE ? OVSFW_ALL
+ : OFPFW_ALL);
match->wildcards = htonl(wildcards);
match->in_port = htons(flow->in_port == ODPP_LOCAL ? OFPP_LOCAL
}
void
-flow_from_match(const struct ofp_match *match, bool tun_id_from_cookie,
- ovs_be64 cookie, struct flow *flow, uint32_t *flow_wildcards)
+flow_from_match(const struct ofp_match *match, int flow_format,
+ ovs_be64 cookie, struct flow *flow,
+ struct flow_wildcards *wc)
{
- uint32_t wildcards = ntohl(match->wildcards);
+ uint32_t wildcards = ntohl(match->wildcards) & OVSFW_ALL;
- flow->nw_src = match->nw_src;
- flow->nw_dst = match->nw_dst;
- if (tun_id_from_cookie && !(wildcards & NXFW_TUN_ID)) {
- flow->tun_id = htonl(ntohll(cookie) >> 32);
- } else {
+ flow->tun_id = 0;
+ if (flow_format != NXFF_TUN_ID_FROM_COOKIE) {
wildcards |= NXFW_TUN_ID;
- flow->tun_id = 0;
+ } else {
+ if (!(wildcards & NXFW_TUN_ID)) {
+ flow->tun_id = htonl(ntohll(cookie) >> 32);
+ }
}
+ if (wildcards & OFPFW_DL_DST) {
+ /* OpenFlow 1.0 OFPFW_DL_DST covers the whole Ethernet destination, but
+ * internally to OVS it excludes the multicast bit, which has to be set
+ * separately with FWW_ETH_MCAST. */
+ wildcards |= FWW_ETH_MCAST;
+ }
+ flow_wildcards_init(wc, wildcards);
+
+ flow->nw_src = match->nw_src;
+ flow->nw_dst = match->nw_dst;
flow->in_port = (match->in_port == htons(OFPP_LOCAL) ? ODPP_LOCAL
: ntohs(match->in_port));
flow->dl_vlan = match->dl_vlan;
memcpy(flow->dl_dst, match->dl_dst, ETH_ADDR_LEN);
flow->nw_tos = match->nw_tos;
flow->nw_proto = match->nw_proto;
- if (flow_wildcards) {
- *flow_wildcards = wildcards;
- }
}
char *
return wildcards < 32 ? htonl(~((1u << wildcards) - 1)) : 0;
}
+/* Return 'wildcards' in "normal form":
+ *
+ * - Forces unknown bits to 0.
+ *
+ * - Forces nw_src and nw_dst masks greater than 32 to exactly 32.
+ */
+static inline uint32_t
+flow_wildcards_normalize(uint32_t wildcards)
+{
+ wildcards &= wildcards & (OVSFW_ALL | FWW_ALL);
+ if (wildcards & (0x20 << OFPFW_NW_SRC_SHIFT)) {
+ wildcards &= ~(0x1f << OFPFW_NW_SRC_SHIFT);
+ }
+ if (wildcards & (0x20 << OFPFW_NW_DST_SHIFT)) {
+ wildcards &= ~(0x1f << OFPFW_NW_DST_SHIFT);
+ }
+ return wildcards;
+}
+
/* Initializes 'wc' from 'wildcards', which may be any combination of the
- * OFPFW_* and OVSFW_* wildcard bits. */
+ * OFPFW_* and OVSFW_* wildcard bits.
+ *
+ * All registers (NXM_NX_REG*) are always completely wildcarded, because
+ * 'wildcards' doesn't have enough bits to give the details on which
+ * particular bits should be wildcarded (if any). The caller may use
+ * flow_wildcards_set_reg_mask() to update the register wildcard masks. */
void
flow_wildcards_init(struct flow_wildcards *wc, uint32_t wildcards)
{
- wc->wildcards = wildcards & OVSFW_ALL;
+ wc->wildcards = flow_wildcards_normalize(wildcards) | FWW_REGS;
wc->nw_src_mask = flow_nw_bits_to_mask(wc->wildcards, OFPFW_NW_SRC_SHIFT);
wc->nw_dst_mask = flow_nw_bits_to_mask(wc->wildcards, OFPFW_NW_DST_SHIFT);
+ memset(wc->reg_masks, 0, sizeof wc->reg_masks);
}
/* Initializes 'wc' as an exact-match set of wildcards; that is, 'wc' does not
void
flow_wildcards_init_exact(struct flow_wildcards *wc)
{
- flow_wildcards_init(wc, 0);
+ wc->wildcards = 0;
+ wc->nw_src_mask = htonl(UINT32_MAX);
+ wc->nw_dst_mask = htonl(UINT32_MAX);
+ memset(wc->reg_masks, 0xff, sizeof wc->reg_masks);
+}
+
+static inline uint32_t
+combine_nw_bits(uint32_t wb1, uint32_t wb2, int shift)
+{
+ uint32_t sb1 = (wb1 >> shift) & 0x3f;
+ uint32_t sb2 = (wb2 >> shift) & 0x3f;
+ return MAX(sb1, sb2) << shift;
+}
+
+/* Initializes 'dst' as the combination of wildcards in 'src1' and 'src2'.
+ * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded in
+ * 'src1' or 'src2' or both. */
+void
+flow_wildcards_combine(struct flow_wildcards *dst,
+ const struct flow_wildcards *src1,
+ const struct flow_wildcards *src2)
+{
+ uint32_t wb1 = src1->wildcards;
+ uint32_t wb2 = src2->wildcards;
+ int i;
+
+ dst->wildcards = (wb1 | wb2) & ~(OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK);
+ dst->wildcards |= combine_nw_bits(wb1, wb2, OFPFW_NW_SRC_SHIFT);
+ dst->wildcards |= combine_nw_bits(wb1, wb2, OFPFW_NW_DST_SHIFT);
+ dst->nw_src_mask = src1->nw_src_mask & src2->nw_src_mask;
+ dst->nw_dst_mask = src1->nw_dst_mask & src2->nw_dst_mask;
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ dst->reg_masks[i] = src1->reg_masks[i] & src2->reg_masks[i];
+ }
+}
+
+/* Returns a hash of the wildcards in 'wc'. */
+uint32_t
+flow_wildcards_hash(const struct flow_wildcards *wc)
+{
+ /* There is no need to include nw_src_mask or nw_dst_mask because they do
+ * not add any information (they can be computed from wc->wildcards). */
+ BUILD_ASSERT_DECL(sizeof wc->wildcards == 4);
+ BUILD_ASSERT_DECL(sizeof wc->reg_masks == 4 * FLOW_N_REGS);
+ BUILD_ASSERT_DECL(offsetof(struct flow_wildcards, wildcards) == 0);
+ BUILD_ASSERT_DECL(offsetof(struct flow_wildcards, reg_masks) == 4);
+ return hash_words((const uint32_t *) wc, 1 + FLOW_N_REGS, 0);
+}
+
+/* Returns true if 'a' and 'b' represent the same wildcards, false if they are
+ * different. */
+bool
+flow_wildcards_equal(const struct flow_wildcards *a,
+ const struct flow_wildcards *b)
+{
+ int i;
+
+ if (a->wildcards != b->wildcards) {
+ return false;
+ }
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if (a->reg_masks[i] != b->reg_masks[i]) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/* Returns true if at least one bit or field is wildcarded in 'a' but not in
+ * 'b', false otherwise. */
+bool
+flow_wildcards_has_extra(const struct flow_wildcards *a,
+ const struct flow_wildcards *b)
+{
+ int i;
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if ((a->reg_masks[i] & b->reg_masks[i]) != b->reg_masks[i]) {
+ return true;
+ }
+ }
+
+#define OFPFW_NW_MASK (OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK)
+ return ((a->wildcards & ~(b->wildcards | OFPFW_NW_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);
}
static int
{
return set_nw_mask(wc, mask, &wc->nw_dst_mask, OFPFW_NW_DST_SHIFT);
}
+
+/* Sets the wildcard mask for register 'idx' in 'wc' to 'mask'.
+ * (A 0-bit indicates a wildcard bit.) */
+void
+flow_wildcards_set_reg_mask(struct flow_wildcards *wc, int idx, uint32_t mask)
+{
+ if (mask != wc->reg_masks[idx]) {
+ wc->reg_masks[idx] = mask;
+ if (mask != UINT32_MAX) {
+ wc->wildcards |= FWW_REGS;
+ } else {
+ int i;
+
+ for (i = 0; i < FLOW_N_REGS; i++) {
+ if (wc->reg_masks[i] != UINT32_MAX) {
+ wc->wildcards |= FWW_REGS;
+ return;
+ }
+ }
+ wc->wildcards &= ~FWW_REGS;
+ }
+ }
+}
projects / openvswitch / blobdiff