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tcp: Split init and ns cases for tcp_sock_refill()

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With the creation of the tcp_sock_refill_pool() helper, the ns==true and
ns==false paths for tcp_sock_refill() now have almost nothing in common.
Split the two versions into tcp_sock_refill_init() and tcp_sock_refill_ns()
functions.

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 2023-02-14 10:48:20 +11:00 committed by Stefano Brivio
parent e456c1ccdc
commit c8993476d5
1 changed files with 21 additions and 32 deletions
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53
tcp.c
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@ -3038,40 +3038,33 @@ static void tcp_sock_refill_pool(const struct ctx *c, int pool[], int af)
}
/**
* struct tcp_sock_refill_arg - Arguments for tcp_sock_refill()
* tcp_sock_refill_init() - Refill pools of pre-opened sockets in init ns
* @c: Execution context
* @ns: Set to refill pool of sockets created in namespace
*/
struct tcp_sock_refill_arg {
struct ctx *c;
int ns;
};
static void tcp_sock_refill_init(const struct ctx *c)
{
if (c->ifi4)
tcp_sock_refill_pool(c, init_sock_pool4, AF_INET);
if (c->ifi6)
tcp_sock_refill_pool(c, init_sock_pool6, AF_INET6);
}
/**
* tcp_sock_refill() - Refill pool of pre-opened sockets
* @arg: See @tcp_sock_refill_arg
* tcp_sock_refill_ns() - Refill pools of pre-opened sockets in namespace
* @arg: Execution context cast to void *
*
* Return: 0
*/
static int tcp_sock_refill(void *arg)
static int tcp_sock_refill_ns(void *arg)
{
struct tcp_sock_refill_arg *a = (struct tcp_sock_refill_arg *)arg;
int *p4, *p6;
const struct ctx *c = (const struct ctx *)arg;
if (a->ns) {
ns_enter(a->c);
p4 = ns_sock_pool4;
p6 = ns_sock_pool6;
} else {
p4 = init_sock_pool4;
p6 = init_sock_pool6;
}
ns_enter(c);
if (a->c->ifi4)
tcp_sock_refill_pool(a->c, p4, AF_INET);
if (a->c->ifi6)
tcp_sock_refill_pool(a->c, p6, AF_INET6);
if (c->ifi4)
tcp_sock_refill_pool(c, ns_sock_pool4, AF_INET);
if (c->ifi6)
tcp_sock_refill_pool(c, ns_sock_pool6, AF_INET6);
return 0;
}
@ -3084,7 +3077,6 @@ static int tcp_sock_refill(void *arg)
*/
int tcp_init(struct ctx *c)
{
struct tcp_sock_refill_arg refill_arg = { c, 0 };
int i;
#ifndef HAS_GETRANDOM
int dev_random = open("/dev/random", O_RDONLY);
@ -3130,15 +3122,14 @@ int tcp_init(struct ctx *c)
memset(tcp_sock_init_ext, 0xff, sizeof(tcp_sock_init_ext));
memset(tcp_sock_ns, 0xff, sizeof(tcp_sock_ns));
tcp_sock_refill(&refill_arg);
tcp_sock_refill_init(c);
if (c->mode == MODE_PASTA) {
tcp_splice_init(c);
NS_CALL(tcp_ns_socks_init, c);
refill_arg.ns = 1;
NS_CALL(tcp_sock_refill, &refill_arg);
NS_CALL(tcp_sock_refill_ns, c);
}
return 0;
@ -3258,7 +3249,6 @@ static int tcp_port_rebind(void *arg)
*/
void tcp_timer(struct ctx *c, const struct timespec *ts)
{
struct tcp_sock_refill_arg refill_arg = { c, 0 };
union tcp_conn *conn;
(void)ts;
@ -3291,12 +3281,11 @@ void tcp_timer(struct ctx *c, const struct timespec *ts)
}
}
tcp_sock_refill(&refill_arg);
tcp_sock_refill_init(c);
if (c->mode == MODE_PASTA) {
refill_arg.ns = 1;
if ((c->ifi4 && ns_sock_pool4[TCP_SOCK_POOL_TSH] < 0) ||
(c->ifi6 && ns_sock_pool6[TCP_SOCK_POOL_TSH] < 0))
NS_CALL(tcp_sock_refill, &refill_arg);
NS_CALL(tcp_sock_refill_ns, c);
tcp_splice_pipe_refill(c);
}