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flow: Move flow_count from context structure to a global

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In general, the passt code is a bit haphazard about what's a true global
variable and what's in the quasi-global 'context structure'.  The
flow_count field is one such example: it's in the context structure,
although it's really part of the same data structure as flowtab[], which
is a genuine global.

Move flow_count to be a regular global to match.  For now it needs to be
public, rather than static, but we expect to be able to change that in
future.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-01-16 11:50:40 +11:00 • committed by Stefano Brivio
parent 7f37bf4cd5
commit fb7c00169d
7 changed files with 17 additions and 18 deletions

10
tcp.c
View file

@ -1307,7 +1307,7 @@ static struct tcp_tap_conn *tcp_hash_lookup(const struct ctx *c,
* @c: Execution context
* @flow: Flow table entry for this connection
*/
void tcp_flow_defer(struct ctx *c, union flow *flow)
void tcp_flow_defer(const struct ctx *c, union flow *flow)
{
const struct tcp_tap_conn *conn = &flow->tcp;
@ -1949,7 +1949,7 @@ static void tcp_conn_from_tap(struct ctx *c,
(void)saddr;
if (c->flow_count >= FLOW_MAX)
if (flow_count >= FLOW_MAX)
return;
if ((s = tcp_conn_pool_sock(pool)) < 0)
@ -1975,7 +1975,7 @@ static void tcp_conn_from_tap(struct ctx *c,
}
}
conn = CONN(c->flow_count++);
conn = CONN(flow_count++);
conn->f.type = FLOW_TCP;
conn->sock = s;
conn->timer = -1;
@ -2724,14 +2724,14 @@ void tcp_listen_handler(struct ctx *c, union epoll_ref ref,
union flow *flow;
int s;
if (c->no_tcp || c->flow_count >= FLOW_MAX)
if (c->no_tcp || flow_count >= FLOW_MAX)
return;
s = accept4(ref.fd, (struct sockaddr *)&sa, &sl, SOCK_NONBLOCK);
if (s < 0)
return;
flow = flowtab + c->flow_count++;
flow = flowtab + flow_count++;
if (c->mode == MODE_PASTA &&
tcp_splice_conn_from_sock(c, ref.tcp_listen, &flow->tcp_splice,