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[NETNS]: Allow to create sockets in non-initial namespace. 

Allow to create sockets in the namespace if the protocol ok with this.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2008-03-24 15:33:42 -07:00 committed by David S. Miller
parent f145049a06
commit 2342fd7e14
1 changed files with 21 additions and 3 deletions
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24
net/ipv4/af_inet.c
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@ -243,6 +243,23 @@ void build_ehash_secret(void)
} }
EXPORT_SYMBOL(build_ehash_secret); EXPORT_SYMBOL(build_ehash_secret);
static inline int inet_netns_ok(struct net *net, int protocol)
{
int hash;
struct net_protocol *ipprot;
if (net == &init_net)
return 1;
hash = protocol & (MAX_INET_PROTOS - 1);
ipprot = rcu_dereference(inet_protos[hash]);
if (ipprot == NULL)
/* raw IP is OK */
return 1;
return ipprot->netns_ok;
}
/* /*
* Create an inet socket. * Create an inet socket.
*/ */
@ -259,9 +276,6 @@ static int inet_create(struct net *net, struct socket *sock, int protocol)
int try_loading_module = 0; int try_loading_module = 0;
int err; int err;
if (net != &init_net)
return -EAFNOSUPPORT;
if (sock->type != SOCK_RAW && if (sock->type != SOCK_RAW &&
sock->type != SOCK_DGRAM && sock->type != SOCK_DGRAM &&
!inet_ehash_secret) !inet_ehash_secret)
@ -320,6 +334,10 @@ lookup_protocol:
if (answer->capability > 0 && !capable(answer->capability)) if (answer->capability > 0 && !capable(answer->capability))
goto out_rcu_unlock; goto out_rcu_unlock;
err = -EAFNOSUPPORT;
if (!inet_netns_ok(net, protocol))
goto out_rcu_unlock;
sock->ops = answer->ops; sock->ops = answer->ops;
answer_prot = answer->prot; answer_prot = answer->prot;
answer_no_check = answer->no_check; answer_no_check = answer->no_check;