From: Alexey Dobriyan Date: Tue, 16 Feb 2010 09:05:04 +0000 (+0000) Subject: tunnels: fix netns vs proto registration ordering X-Git-Tag: firefly_0821_release~9833^2~3055^2~301 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d5aa407f59f5b83d2c50ec88f5bf56d40f1f8978;p=firefly-linux-kernel-4.4.55.git tunnels: fix netns vs proto registration ordering Same stuff as in ip_gre patch: receive hook can be called before netns setup is done, oopsing in net_generic(). Signed-off-by: Alexey Dobriyan Signed-off-by: David S. Miller --- diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 95db732e542b..2f302d3ac9a3 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -830,15 +830,14 @@ static int __init ipip_init(void) printk(banner); - if (xfrm4_tunnel_register(&ipip_handler, AF_INET)) { + err = register_pernet_device(&ipip_net_ops); + if (err < 0) + return err; + err = xfrm4_tunnel_register(&ipip_handler, AF_INET); + if (err < 0) { + unregister_pernet_device(&ipip_net_ops); printk(KERN_INFO "ipip init: can't register tunnel\n"); - return -EAGAIN; } - - err = register_pernet_device(&ipip_net_ops); - if (err) - xfrm4_tunnel_deregister(&ipip_handler, AF_INET); - return err; } diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index fbd786981aa9..9b02492d8706 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1461,27 +1461,29 @@ static int __init ip6_tunnel_init(void) { int err; - if (xfrm6_tunnel_register(&ip4ip6_handler, AF_INET)) { + err = register_pernet_device(&ip6_tnl_net_ops); + if (err < 0) + goto out_pernet; + + err = xfrm6_tunnel_register(&ip4ip6_handler, AF_INET); + if (err < 0) { printk(KERN_ERR "ip6_tunnel init: can't register ip4ip6\n"); - err = -EAGAIN; - goto out; + goto out_ip4ip6; } - if (xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6)) { + err = xfrm6_tunnel_register(&ip6ip6_handler, AF_INET6); + if (err < 0) { printk(KERN_ERR "ip6_tunnel init: can't register ip6ip6\n"); - err = -EAGAIN; - goto unreg_ip4ip6; + goto out_ip6ip6; } - err = register_pernet_device(&ip6_tnl_net_ops); - if (err < 0) - goto err_pernet; return 0; -err_pernet: - xfrm6_tunnel_deregister(&ip6ip6_handler, AF_INET6); -unreg_ip4ip6: + +out_ip6ip6: xfrm6_tunnel_deregister(&ip4ip6_handler, AF_INET); -out: +out_ip4ip6: + unregister_pernet_device(&ip6_tnl_net_ops); +out_pernet: return err; } diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 10207cc8cc0e..52ffd29cb93f 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1227,15 +1227,14 @@ static int __init sit_init(void) printk(KERN_INFO "IPv6 over IPv4 tunneling driver\n"); - if (xfrm4_tunnel_register(&sit_handler, AF_INET6) < 0) { - printk(KERN_INFO "sit init: Can't add protocol\n"); - return -EAGAIN; - } - err = register_pernet_device(&sit_net_ops); if (err < 0) - xfrm4_tunnel_deregister(&sit_handler, AF_INET6); - + return err; + err = xfrm4_tunnel_register(&sit_handler, AF_INET6); + if (err < 0) { + unregister_pernet_device(&sit_net_ops); + printk(KERN_INFO "sit init: Can't add protocol\n"); + } return err; } diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c index d6f9aeec69f7..ddce21e3459b 100644 --- a/net/ipv6/xfrm6_tunnel.c +++ b/net/ipv6/xfrm6_tunnel.c @@ -84,23 +84,6 @@ static inline unsigned xfrm6_tunnel_spi_hash_byspi(u32 spi) return spi % XFRM6_TUNNEL_SPI_BYSPI_HSIZE; } - -static int __init xfrm6_tunnel_spi_init(void) -{ - xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi", - sizeof(struct xfrm6_tunnel_spi), - 0, SLAB_HWCACHE_ALIGN, - NULL); - if (!xfrm6_tunnel_spi_kmem) - return -ENOMEM; - return 0; -} - -static void xfrm6_tunnel_spi_fini(void) -{ - kmem_cache_destroy(xfrm6_tunnel_spi_kmem); -} - static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr) { struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net); @@ -375,42 +358,44 @@ static int __init xfrm6_tunnel_init(void) { int rv; + xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi", + sizeof(struct xfrm6_tunnel_spi), + 0, SLAB_HWCACHE_ALIGN, + NULL); + if (!xfrm6_tunnel_spi_kmem) + return -ENOMEM; + rv = register_pernet_subsys(&xfrm6_tunnel_net_ops); + if (rv < 0) + goto out_pernet; rv = xfrm_register_type(&xfrm6_tunnel_type, AF_INET6); if (rv < 0) - goto err; + goto out_type; rv = xfrm6_tunnel_register(&xfrm6_tunnel_handler, AF_INET6); if (rv < 0) - goto unreg; + goto out_xfrm6; rv = xfrm6_tunnel_register(&xfrm46_tunnel_handler, AF_INET); if (rv < 0) - goto dereg6; - rv = xfrm6_tunnel_spi_init(); - if (rv < 0) - goto dereg46; - rv = register_pernet_subsys(&xfrm6_tunnel_net_ops); - if (rv < 0) - goto deregspi; + goto out_xfrm46; return 0; -deregspi: - xfrm6_tunnel_spi_fini(); -dereg46: - xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET); -dereg6: +out_xfrm46: xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6); -unreg: +out_xfrm6: xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6); -err: +out_type: + unregister_pernet_subsys(&xfrm6_tunnel_net_ops); +out_pernet: + kmem_cache_destroy(xfrm6_tunnel_spi_kmem); return rv; } static void __exit xfrm6_tunnel_fini(void) { - unregister_pernet_subsys(&xfrm6_tunnel_net_ops); - xfrm6_tunnel_spi_fini(); xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET); xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6); xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6); + unregister_pernet_subsys(&xfrm6_tunnel_net_ops); + kmem_cache_destroy(xfrm6_tunnel_spi_kmem); } module_init(xfrm6_tunnel_init);