diff options
Diffstat (limited to 'flow.c')
| -rw-r--r-- | flow.c | 39 |
1 files changed, 39 insertions, 0 deletions
@@ -27,3 +27,42 @@ static_assert(ARRAY_SIZE(flow_type_str) == FLOW_NUM_TYPES, /* Global Flow Table */ union flow flowtab[FLOW_MAX]; + +/** + * flow_table_compact() - Perform compaction on flow table + * @c: Execution context + * @hole: Pointer to recently closed flow + */ +void flow_table_compact(struct ctx *c, union flow *hole) +{ + union flow *from; + + if (FLOW_IDX(hole) == --c->flow_count) { + debug("flow: table compaction: maximum index was %u (%p)", + FLOW_IDX(hole), (void *)hole); + memset(hole, 0, sizeof(*hole)); + return; + } + + from = flowtab + c->flow_count; + memcpy(hole, from, sizeof(*hole)); + + switch (from->f.type) { + case FLOW_TCP: + tcp_tap_conn_update(c, &from->tcp, &hole->tcp); + break; + case FLOW_TCP_SPLICE: + tcp_splice_conn_update(c, &hole->tcp_splice); + break; + default: + die("Unexpected %s in tcp_table_compact()", + FLOW_TYPE(&from->f)); + } + + debug("flow: table compaction (%s): old index %u, new index %u, " + "from: %p, to: %p", + FLOW_TYPE(&from->f), FLOW_IDX(from), FLOW_IDX(hole), + (void *)from, (void *)hole); + + memset(from, 0, sizeof(*from)); +} |