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[IPV6]: make the protocol initialization to return an error code

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This patchset makes the different protocols to return an error code, so
the af_inet6 module can check the initialization was correct or not.

The raw6 was taken into account to be consistent with the rest of the
protocols, but the registration is at the same place.
Because the raw6 has its own init function, the proto and the ops structure
can be moved inside the raw6.c file.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Lezcano 2007-12-11 02:25:35 -08:00 committed by David S. Miller
parent 87c3efbfdd
commit 7f4e4868f3
8 changed files with 169 additions and 66 deletions
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2
include/net/ipv6.h
View file

@ -545,7 +545,7 @@ extern int compat_ipv6_getsockopt(struct sock *sk,
char __user *optval,
int __user *optlen);
extern void ipv6_packet_init(void);
extern int ipv6_packet_init(void);
extern void ipv6_packet_cleanup(void);

12
include/net/transp_v6.h
View file

@ -23,10 +23,14 @@ extern int ipv6_frag_init(void);
extern void ipv6_frag_exit(void);
/* transport protocols */
extern void rawv6_init(void);
extern void udpv6_init(void);
extern void udplitev6_init(void);
extern void tcpv6_init(void);
extern int rawv6_init(void);
extern void rawv6_exit(void);
extern int udpv6_init(void);
extern void udpv6_exit(void);
extern int udplitev6_init(void);
extern void udplitev6_exit(void);
extern int tcpv6_init(void);
extern void tcpv6_exit(void);
extern int udpv6_connect(struct sock *sk,
struct sockaddr *uaddr,

77
net/ipv6/af_inet6.c
View file

@ -529,42 +529,6 @@ static struct net_proto_family inet6_family_ops = {
.owner = THIS_MODULE,
};
/* Same as inet6_dgram_ops, sans udp_poll. */
static const struct proto_ops inet6_sockraw_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_dgram_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = sock_no_accept, /* a do nothing */
.getname = inet6_getname,
.poll = datagram_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
.listen = sock_no_listen, /* ok */
.shutdown = inet_shutdown, /* ok */
.setsockopt = sock_common_setsockopt, /* ok */
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = sock_common_recvmsg, /* ok */
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
#endif
};
static struct inet_protosw rawv6_protosw = {
.type = SOCK_RAW,
.protocol = IPPROTO_IP, /* wild card */
.prot = &rawv6_prot,
.ops = &inet6_sockraw_ops,
.capability = CAP_NET_RAW,
.no_check = UDP_CSUM_DEFAULT,
.flags = INET_PROTOSW_REUSE,
};
int inet6_register_protosw(struct inet_protosw *p)
{
struct list_head *lh;
@ -771,7 +735,6 @@ static int __init inet6_init(void)
__this_module.can_unload = &ipv6_unload;
#endif
#endif
err = proto_register(&tcpv6_prot, 1);
if (err)
goto out;
@ -796,14 +759,16 @@ static int __init inet6_init(void)
/* We MUST register RAW sockets before we create the ICMP6,
* IGMP6, or NDISC control sockets.
*/
inet6_register_protosw(&rawv6_protosw);
err = rawv6_init();
if (err)
goto out_unregister_raw_proto;
/* Register the family here so that the init calls below will
* be able to create sockets. (?? is this dangerous ??)
*/
err = sock_register(&inet6_family_ops);
if (err)
goto out_unregister_raw_proto;
goto out_sock_register_fail;
/* Initialise ipv6 mibs */
err = init_ipv6_mibs();
@ -871,15 +836,32 @@ static int __init inet6_init(void)
goto ipv6_frag_fail;
/* Init v6 transport protocols. */
udpv6_init();
udplitev6_init();
tcpv6_init();
err = udpv6_init();
if (err)
goto udpv6_fail;
ipv6_packet_init();
err = 0;
err = udplitev6_init();
if (err)
goto udplitev6_fail;
err = tcpv6_init();
if (err)
goto tcpv6_fail;
err = ipv6_packet_init();
if (err)
goto ipv6_packet_fail;
out:
return err;
ipv6_packet_fail:
tcpv6_exit();
tcpv6_fail:
udplitev6_exit();
udplitev6_fail:
udpv6_exit();
udpv6_fail:
ipv6_frag_exit();
ipv6_frag_fail:
ipv6_exthdrs_exit();
ipv6_exthdrs_fail:
@ -920,6 +902,8 @@ static int __init inet6_init(void)
out_unregister_sock:
sock_unregister(PF_INET6);
rtnl_unregister_all(PF_INET6);
out_sock_register_fail:
rawv6_exit();
out_unregister_raw_proto:
proto_unregister(&rawv6_prot);
out_unregister_udplite_proto:
@ -939,6 +923,10 @@ static void __exit inet6_exit(void)
/* Disallow any further netlink messages */
rtnl_unregister_all(PF_INET6);
udpv6_exit();
udplitev6_exit();
tcpv6_exit();
/* Cleanup code parts. */
ipv6_packet_cleanup();
ipv6_frag_exit();
@ -961,6 +949,7 @@ static void __exit inet6_exit(void)
igmp6_cleanup();
ndisc_cleanup();
icmpv6_cleanup();
rawv6_exit();
#ifdef CONFIG_SYSCTL
ipv6_sysctl_unregister();
#endif

3
net/ipv6/ipv6_sockglue.c
View file

@ -1128,9 +1128,10 @@ int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
EXPORT_SYMBOL(compat_ipv6_getsockopt);
#endif
void __init ipv6_packet_init(void)
int __init ipv6_packet_init(void)
{
dev_add_pack(&ipv6_packet_type);
return 0;
}
void ipv6_packet_cleanup(void)

52
net/ipv6/raw.c
View file

@ -1273,3 +1273,55 @@ void raw6_proc_exit(void)
proc_net_remove(&init_net, "raw6");
}
#endif /* CONFIG_PROC_FS */
/* Same as inet6_dgram_ops, sans udp_poll. */
static const struct proto_ops inet6_sockraw_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_dgram_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = sock_no_accept, /* a do nothing */
.getname = inet6_getname,
.poll = datagram_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
.listen = sock_no_listen, /* ok */
.shutdown = inet_shutdown, /* ok */
.setsockopt = sock_common_setsockopt, /* ok */
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = sock_common_recvmsg, /* ok */
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
#endif
};
static struct inet_protosw rawv6_protosw = {
.type = SOCK_RAW,
.protocol = IPPROTO_IP, /* wild card */
.prot = &rawv6_prot,
.ops = &inet6_sockraw_ops,
.capability = CAP_NET_RAW,
.no_check = UDP_CSUM_DEFAULT,
.flags = INET_PROTOSW_REUSE,
};
int __init rawv6_init(void)
{
int ret;
ret = inet6_register_protosw(&rawv6_protosw);
if (ret)
goto out;
out:
return ret;
}
void __exit rawv6_exit(void)
{
inet6_unregister_protosw(&rawv6_protosw);
}

38
net/ipv6/tcp_ipv6.c
View file

@ -2166,14 +2166,36 @@ static struct inet_protosw tcpv6_protosw = {
INET_PROTOSW_ICSK,
};
void __init tcpv6_init(void)
int __init tcpv6_init(void)
{
/* register inet6 protocol */
if (inet6_add_protocol(&tcpv6_protocol, IPPROTO_TCP) < 0)
printk(KERN_ERR "tcpv6_init: Could not register protocol\n");
inet6_register_protosw(&tcpv6_protosw);
int ret;
if (inet_csk_ctl_sock_create(&tcp6_socket, PF_INET6, SOCK_RAW,
IPPROTO_TCP) < 0)
panic("Failed to create the TCPv6 control socket.\n");
ret = inet6_add_protocol(&tcpv6_protocol, IPPROTO_TCP);
if (ret)
goto out;
/* register inet6 protocol */
ret = inet6_register_protosw(&tcpv6_protosw);
if (ret)
goto out_tcpv6_protocol;
ret = inet_csk_ctl_sock_create(&tcp6_socket, PF_INET6,
SOCK_RAW, IPPROTO_TCP);
if (ret)
goto out_tcpv6_protosw;
out:
return ret;
out_tcpv6_protocol:
inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP);
out_tcpv6_protosw:
inet6_unregister_protosw(&tcpv6_protosw);
goto out;
}
void __exit tcpv6_exit(void)
{
sock_release(tcp6_socket);
inet6_unregister_protosw(&tcpv6_protosw);
inet6_del_protocol(&tcpv6_protocol, IPPROTO_TCP);
}

26
net/ipv6/udp.c
View file

@ -1016,9 +1016,27 @@ static struct inet_protosw udpv6_protosw = {
};
void __init udpv6_init(void)
int __init udpv6_init(void)
{
if (inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP) < 0)
printk(KERN_ERR "udpv6_init: Could not register protocol\n");
inet6_register_protosw(&udpv6_protosw);
int ret;
ret = inet6_add_protocol(&udpv6_protocol, IPPROTO_UDP);
if (ret)
goto out;
ret = inet6_register_protosw(&udpv6_protosw);
if (ret)
goto out_udpv6_protocol;
out:
return ret;
out_udpv6_protocol:
inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
goto out;
}
void __exit udpv6_exit(void)
{
inet6_unregister_protosw(&udpv6_protosw);
inet6_del_protocol(&udpv6_protocol, IPPROTO_UDP);
}

25
net/ipv6/udplite.c
View file

@ -77,12 +77,29 @@ static struct inet_protosw udplite6_protosw = {
.flags = INET_PROTOSW_PERMANENT,
};
void __init udplitev6_init(void)
int __init udplitev6_init(void)
{
if (inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE) < 0)
printk(KERN_ERR "%s: Could not register.\n", __FUNCTION__);
int ret;
inet6_register_protosw(&udplite6_protosw);
ret = inet6_add_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
if (ret)
goto out;
ret = inet6_register_protosw(&udplite6_protosw);
if (ret)
goto out_udplitev6_protocol;
out:
return ret;
out_udplitev6_protocol:
inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
goto out;
}
void __exit udplitev6_exit(void)
{
inet6_unregister_protosw(&udplite6_protosw);
inet6_del_protocol(&udplitev6_protocol, IPPROTO_UDPLITE);
}
#ifdef CONFIG_PROC_FS