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Commit e6dd731c authored by Sven Wegener's avatar Sven Wegener
Browse files

ipvs: Use ERR_PTR for returning errors from make_receive_sock() and make_send_sock() 



The additional information we now return to the caller is currently not used,
but will be used to return errors to user space.

Signed-off-by: default avatarSven Wegener <sven.wegener@stealer.net>
Acked-by: default avatarSimon Horman <horms@verge.net.au>
parent d5640050

net/ipv4/ipvs/ip_vs_sync.c

+27 −19
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/in.h>

#include <linux/igmp.h>                 /* for ip_mc_join_group */

#include <linux/udp.h>

#include <linux/err.h>



#include <net/ip.h>

#include <net/sock.h>
@@ -576,14 +577,17 @@ static int bind_mcastif_addr(struct socket *sock, char *ifname) 
static struct socket * make_send_sock(void)

{

	struct socket *sock;

	int result;



	/* First create a socket */

	if (sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock) < 0) {

	result = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);

	if (result < 0) {

		IP_VS_ERR("Error during creation of socket; terminating\n");

		return NULL;

		return ERR_PTR(result);

	}



	if (set_mcast_if(sock->sk, ip_vs_master_mcast_ifn) < 0) {

	result = set_mcast_if(sock->sk, ip_vs_master_mcast_ifn);

	if (result < 0) {

		IP_VS_ERR("Error setting outbound mcast interface\n");

		goto error;

	}
@@ -591,14 +595,15 @@ static struct socket * make_send_sock(void) 
	set_mcast_loop(sock->sk, 0);

	set_mcast_ttl(sock->sk, 1);



	if (bind_mcastif_addr(sock, ip_vs_master_mcast_ifn) < 0) {

	result = bind_mcastif_addr(sock, ip_vs_master_mcast_ifn);

	if (result < 0) {

		IP_VS_ERR("Error binding address of the mcast interface\n");

		goto error;

	}



	if (sock->ops->connect(sock,

			       (struct sockaddr*)&mcast_addr,

			       sizeof(struct sockaddr), 0) < 0) {

	result = sock->ops->connect(sock, (struct sockaddr *) &mcast_addr,

			sizeof(struct sockaddr), 0);

	if (result < 0) {

		IP_VS_ERR("Error connecting to the multicast addr\n");

		goto error;

	}
@@ -607,7 +612,7 @@ static struct socket * make_send_sock(void) 


  error:

	sock_release(sock);

	return NULL;

	return ERR_PTR(result);

}
@@ -617,27 +622,30 @@ static struct socket * make_send_sock(void) 
static struct socket * make_receive_sock(void)

{

	struct socket *sock;

	int result;



	/* First create a socket */

	if (sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock) < 0) {

	result = sock_create_kern(PF_INET, SOCK_DGRAM, IPPROTO_UDP, &sock);

	if (result < 0) {

		IP_VS_ERR("Error during creation of socket; terminating\n");

		return NULL;

		return ERR_PTR(result);

	}



	/* it is equivalent to the REUSEADDR option in user-space */

	sock->sk->sk_reuse = 1;



	if (sock->ops->bind(sock,

			    (struct sockaddr*)&mcast_addr,

			    sizeof(struct sockaddr)) < 0) {

	result = sock->ops->bind(sock, (struct sockaddr *) &mcast_addr,

			sizeof(struct sockaddr));

	if (result < 0) {

		IP_VS_ERR("Error binding to the multicast addr\n");

		goto error;

	}



	/* join the multicast group */

	if (join_mcast_group(sock->sk,

	result = join_mcast_group(sock->sk,

			(struct in_addr *) &mcast_addr.sin_addr,

			     ip_vs_backup_mcast_ifn) < 0) {

			ip_vs_backup_mcast_ifn);

	if (result < 0) {

		IP_VS_ERR("Error joining to the multicast group\n");

		goto error;

	}
@@ -646,7 +654,7 @@ static struct socket * make_receive_sock(void) 


  error:

	sock_release(sock);

	return NULL;

	return ERR_PTR(result);

}
@@ -719,7 +727,7 @@ static void sync_master_loop(void) 


	/* create the sending multicast socket */

	sock = make_send_sock();

	if (!sock)

	if (IS_ERR(sock))

		return;



	IP_VS_INFO("sync thread started: state = MASTER, mcast_ifn = %s, "
@@ -772,7 +780,7 @@ static void sync_backup_loop(void) 


	/* create the receiving multicast socket */

	sock = make_receive_sock();

	if (!sock)

	if (IS_ERR(sock))

		goto out;



	IP_VS_INFO("sync thread started: state = BACKUP, mcast_ifn = %s, "