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drbd: pull prepare_listen_socket() out of drbd_wait_for_connect()

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2012-07-12 11:08:34 +02:00
parent 9a51ab1c1b
commit 1f3e509b76
1 changed files with 46 additions and 14 deletions
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60
drivers/block/drbd/drbd_receiver.c
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@ -666,12 +666,11 @@ static struct socket *drbd_try_connect(struct drbd_tconn *tconn)
return sock;
}
static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
static struct socket *prepare_listen_socket(struct drbd_tconn *tconn)
{
int timeo, err, my_addr_len;
int sndbuf_size, rcvbuf_size, connect_int;
struct socket *s_estab = NULL, *s_listen;
int err, sndbuf_size, rcvbuf_size, my_addr_len;
struct sockaddr_in6 my_addr;
struct socket *s_listen;
struct net_conf *nc;
const char *what;
@ -683,7 +682,6 @@ static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
}
sndbuf_size = nc->sndbuf_size;
rcvbuf_size = nc->rcvbuf_size;
connect_int = nc->connect_int;
rcu_read_unlock();
my_addr_len = min_t(int, tconn->my_addr_len, sizeof(struct sockaddr_in6));
@ -691,18 +689,13 @@ static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
what = "sock_create_kern";
err = sock_create_kern(((struct sockaddr *)&my_addr)->sa_family,
SOCK_STREAM, IPPROTO_TCP, &s_listen);
SOCK_STREAM, IPPROTO_TCP, &s_listen);
if (err) {
s_listen = NULL;
goto out;
}
timeo = connect_int * HZ;
timeo += (random32() & 1) ? timeo / 7 : -timeo / 7; /* 28.5% random jitter */
s_listen->sk->sk_reuse = 1; /* SO_REUSEADDR */
s_listen->sk->sk_rcvtimeo = timeo;
s_listen->sk->sk_sndtimeo = timeo;
s_listen->sk->sk_reuse = 1; /* SO_REUSEADDR */
drbd_setbufsize(s_listen, sndbuf_size, rcvbuf_size);
what = "bind before listen";
@ -715,7 +708,46 @@ static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
if (err < 0)
goto out;
what = "accept";
return s_listen;
out:
if (s_listen)
sock_release(s_listen);
if (err < 0) {
if (err != -EAGAIN && err != -EINTR && err != -ERESTARTSYS) {
conn_err(tconn, "%s failed, err = %d\n", what, err);
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
}
}
return NULL;
}
static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
{
int timeo, connect_int, err = 0;
struct socket *s_estab = NULL;
struct socket *s_listen;
struct net_conf *nc;
rcu_read_lock();
nc = rcu_dereference(tconn->net_conf);
if (!nc) {
rcu_read_unlock();
return NULL;
}
connect_int = nc->connect_int;
rcu_read_unlock();
timeo = connect_int * HZ;
timeo += (random32() & 1) ? timeo / 7 : -timeo / 7; /* 28.5% random jitter */
s_listen = prepare_listen_socket(tconn);
if (!s_listen)
goto out;
s_listen->sk->sk_rcvtimeo = timeo;
s_listen->sk->sk_sndtimeo = timeo;
err = kernel_accept(s_listen, &s_estab, 0);
out:
@ -723,7 +755,7 @@ static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn)
sock_release(s_listen);
if (err < 0) {
if (err != -EAGAIN && err != -EINTR && err != -ERESTARTSYS) {
conn_err(tconn, "%s failed, err = %d\n", what, err);
conn_err(tconn, "accept failed, err = %d\n", err);
conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD);
}
}