diff options
Diffstat (limited to 'lib/classifier.c')
| -rw-r--r-- | lib/classifier.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/lib/classifier.c b/lib/classifier.c index 0a89626cc..18dbfc83a 100644 --- a/lib/classifier.c +++ b/lib/classifier.c @@ -1695,6 +1695,8 @@ find_match_wc(const struct cls_subtable *subtable, ovs_version_t version, const struct cls_match *rule = NULL; struct flowmap stages_map = FLOWMAP_EMPTY_INITIALIZER; unsigned int mask_offset = 0; + bool adjust_ports_mask = false; + ovs_be32 ports_mask; int i; /* Try to finish early by checking fields in segments. */ @@ -1722,6 +1724,9 @@ find_match_wc(const struct cls_subtable *subtable, ovs_version_t version, subtable->index_maps[i], flow, wc)) { goto no_match; } + /* Accumulate the map used so far. */ + stages_map = flowmap_or(stages_map, subtable->index_maps[i]); + hash = flow_hash_in_minimask_range(flow, &subtable->mask, subtable->index_maps[i], &mask_offset, &basis); @@ -1731,14 +1736,16 @@ find_match_wc(const struct cls_subtable *subtable, ovs_version_t version, * unwildcarding all the ports bits, use the ports trie to figure out a * smaller set of bits to unwildcard. */ unsigned int mbits; - ovs_be32 value, plens, mask; + ovs_be32 value, plens; - mask = miniflow_get_ports(&subtable->mask.masks); - value = ((OVS_FORCE ovs_be32 *)flow)[TP_PORTS_OFS32] & mask; + ports_mask = miniflow_get_ports(&subtable->mask.masks); + value = ((OVS_FORCE ovs_be32 *) flow)[TP_PORTS_OFS32] & ports_mask; mbits = trie_lookup_value(&subtable->ports_trie, &value, &plens, 32); - ((OVS_FORCE ovs_be32 *)&wc->masks)[TP_PORTS_OFS32] |= - mask & be32_prefix_mask(mbits); + ports_mask &= be32_prefix_mask(mbits); + ports_mask |= ((OVS_FORCE ovs_be32 *) &wc->masks)[TP_PORTS_OFS32]; + + adjust_ports_mask = true; goto no_match; } @@ -1751,6 +1758,14 @@ no_match: /* Unwildcard the bits in stages so far, as they were used in determining * there is no match. */ flow_wildcards_fold_minimask_in_map(wc, &subtable->mask, stages_map); + if (adjust_ports_mask) { + /* This has to be done after updating flow wildcards to overwrite + * the ports mask back. We can't simply disable the corresponding bit + * in the stages map, because it has 64-bit resolution, i.e. one + * bit covers not only tp_src/dst, but also ct_tp_src/dst, which are + * not covered by the trie. */ + ((OVS_FORCE ovs_be32 *) &wc->masks)[TP_PORTS_OFS32] = ports_mask; + } return NULL; } |