tcp_timer() scans the connection table, expiring "tap" connections and
calling tcp_splice_timer() for "splice" connections. tcp_splice_timer()
expires spliced connections and then does some other processing.
However, tcp_timer() is always called shortly after tcp_defer_handler()
(from post_handler()), which also scans the flow table expiring both tap
and spliced connections. So remove the redundant handling, and only do
the extra tcp_splice_timer() work from tcp_timer().
Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au>
---
tcp.c | 15 ++-------------
tcp_conn.h | 2 +-
tcp_splice.c | 7 ++-----
3 files changed, 5 insertions(+), 19 deletions(-)
diff --git a/tcp.c b/tcp.c
index a72a580..084100d 100644
--- a/tcp.c
+++ b/tcp.c
@@ -3193,20 +3193,9 @@ void tcp_timer(struct ctx *c, const struct timespec *now)
}
}
- for (flow = flowtab + c->flow_count - 1; flow >= flowtab; flow--) {
- switch (flow->f.type) {
- case FLOW_TCP:
- if (flow->tcp.events == CLOSED)
- tcp_conn_destroy(c, flow);
- break;
- case FLOW_TCP_SPLICE:
+ for (flow = flowtab + c->flow_count - 1; flow >= flowtab; flow--)
+ if (flow->f.type == FLOW_TCP_SPLICE)
tcp_splice_timer(c, flow);
- break;
- default:
- die("Unexpected %s in tcp_timer()",
- FLOW_TYPE(&flow->f));
- }
- }
tcp_sock_refill_init(c);
if (c->mode == MODE_PASTA)
diff --git a/tcp_conn.h b/tcp_conn.h
index 3900305..07efe62 100644
--- a/tcp_conn.h
+++ b/tcp_conn.h
@@ -161,7 +161,7 @@ void tcp_tap_conn_update(const struct ctx *c, struct tcp_tap_conn
*old,
struct tcp_tap_conn *new);
void tcp_splice_conn_update(const struct ctx *c, struct tcp_splice_conn *new);
void tcp_splice_destroy(struct ctx *c, union flow *flow);
-void tcp_splice_timer(struct ctx *c, union flow *flow);
+void tcp_splice_timer(const struct ctx *c, union flow *flow);
int tcp_conn_pool_sock(int pool[]);
int tcp_conn_new_sock(const struct ctx *c, sa_family_t af);
void tcp_sock_refill_pool(const struct ctx *c, int pool[], int af);
diff --git a/tcp_splice.c b/tcp_splice.c
index 052f989..cf9b4e8 100644
--- a/tcp_splice.c
+++ b/tcp_splice.c
@@ -755,15 +755,12 @@ void tcp_splice_init(struct ctx *c)
* @c: Execution context
* @flow: Flow table entry
*/
-void tcp_splice_timer(struct ctx *c, union flow *flow)
+void tcp_splice_timer(const struct ctx *c, union flow *flow)
{
struct tcp_splice_conn *conn = &flow->tcp_splice;
int side;
- if (conn->flags & CLOSING) {
- tcp_splice_destroy(c, flow);
- return;
- }
+ ASSERT(!(conn->flags & CLOSING));
for (side = 0; side < SIDES; side++) {
uint8_t set = side == 0 ? RCVLOWAT_SET_0 : RCVLOWAT_SET_1;
--
2.43.0