rxrpc: Add IPv6 support
Add IPv6 support to AF_RXRPC. With this, AF_RXRPC sockets can be created:
service = socket(AF_RXRPC, SOCK_DGRAM, PF_INET6);
instead of:
service = socket(AF_RXRPC, SOCK_DGRAM, PF_INET);
The AFS filesystem doesn't support IPv6 at the moment, though, since that
requires upgrades to some of the RPC calls.
Note that a good portion of this patch is replacing "%pI4:%u" in print
statements with "%pISpc" which is able to handle both protocols and print
the port.
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/net/rxrpc/peer_object.c b/net/rxrpc/peer_object.c
index 3e6cd17..dfc07b4 100644
--- a/net/rxrpc/peer_object.c
+++ b/net/rxrpc/peer_object.c
@@ -16,12 +16,14 @@
#include <linux/skbuff.h>
#include <linux/udp.h>
#include <linux/in.h>
+#include <linux/in6.h>
#include <linux/slab.h>
#include <linux/hashtable.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include <net/ip.h>
#include <net/route.h>
+#include <net/ip6_route.h>
#include "ar-internal.h"
static DEFINE_HASHTABLE(rxrpc_peer_hash, 10);
@@ -50,6 +52,11 @@
size = sizeof(srx->transport.sin.sin_addr);
p = (u16 *)&srx->transport.sin.sin_addr;
break;
+ case AF_INET6:
+ hash_key += (u16 __force)srx->transport.sin.sin_port;
+ size = sizeof(srx->transport.sin6.sin6_addr);
+ p = (u16 *)&srx->transport.sin6.sin6_addr;
+ break;
default:
WARN(1, "AF_RXRPC: Unsupported transport address family\n");
return 0;
@@ -93,6 +100,12 @@
memcmp(&peer->srx.transport.sin.sin_addr,
&srx->transport.sin.sin_addr,
sizeof(struct in_addr));
+ case AF_INET6:
+ return ((u16 __force)peer->srx.transport.sin6.sin6_port -
+ (u16 __force)srx->transport.sin6.sin6_port) ?:
+ memcmp(&peer->srx.transport.sin6.sin6_addr,
+ &srx->transport.sin6.sin6_addr,
+ sizeof(struct in6_addr));
default:
BUG();
}
@@ -130,17 +143,7 @@
peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key);
if (peer) {
- switch (srx->transport.family) {
- case AF_INET:
- _net("PEER %d {%d,%u,%pI4+%hu}",
- peer->debug_id,
- peer->srx.transport_type,
- peer->srx.transport.family,
- &peer->srx.transport.sin.sin_addr,
- ntohs(peer->srx.transport.sin.sin_port));
- break;
- }
-
+ _net("PEER %d {%pISp}", peer->debug_id, &peer->srx.transport);
_leave(" = %p {u=%d}", peer, atomic_read(&peer->usage));
}
return peer;
@@ -152,22 +155,49 @@
*/
static void rxrpc_assess_MTU_size(struct rxrpc_peer *peer)
{
+ struct dst_entry *dst;
struct rtable *rt;
- struct flowi4 fl4;
+ struct flowi fl;
+ struct flowi4 *fl4 = &fl.u.ip4;
+ struct flowi6 *fl6 = &fl.u.ip6;
peer->if_mtu = 1500;
- rt = ip_route_output_ports(&init_net, &fl4, NULL,
- peer->srx.transport.sin.sin_addr.s_addr, 0,
- htons(7000), htons(7001),
- IPPROTO_UDP, 0, 0);
- if (IS_ERR(rt)) {
- _leave(" [route err %ld]", PTR_ERR(rt));
- return;
+ memset(&fl, 0, sizeof(fl));
+ switch (peer->srx.transport.family) {
+ case AF_INET:
+ rt = ip_route_output_ports(
+ &init_net, fl4, NULL,
+ peer->srx.transport.sin.sin_addr.s_addr, 0,
+ htons(7000), htons(7001), IPPROTO_UDP, 0, 0);
+ if (IS_ERR(rt)) {
+ _leave(" [route err %ld]", PTR_ERR(rt));
+ return;
+ }
+ dst = &rt->dst;
+ break;
+
+ case AF_INET6:
+ fl6->flowi6_iif = LOOPBACK_IFINDEX;
+ fl6->flowi6_scope = RT_SCOPE_UNIVERSE;
+ fl6->flowi6_proto = IPPROTO_UDP;
+ memcpy(&fl6->daddr, &peer->srx.transport.sin6.sin6_addr,
+ sizeof(struct in6_addr));
+ fl6->fl6_dport = htons(7001);
+ fl6->fl6_sport = htons(7000);
+ dst = ip6_route_output(&init_net, NULL, fl6);
+ if (IS_ERR(dst)) {
+ _leave(" [route err %ld]", PTR_ERR(dst));
+ return;
+ }
+ break;
+
+ default:
+ BUG();
}
- peer->if_mtu = dst_mtu(&rt->dst);
- dst_release(&rt->dst);
+ peer->if_mtu = dst_mtu(dst);
+ dst_release(dst);
_leave(" [if_mtu %u]", peer->if_mtu);
}
@@ -207,17 +237,22 @@
rxrpc_assess_MTU_size(peer);
peer->mtu = peer->if_mtu;
- if (peer->srx.transport.family == AF_INET) {
+ switch (peer->srx.transport.family) {
+ case AF_INET:
peer->hdrsize = sizeof(struct iphdr);
- switch (peer->srx.transport_type) {
- case SOCK_DGRAM:
- peer->hdrsize += sizeof(struct udphdr);
- break;
- default:
- BUG();
- break;
- }
- } else {
+ break;
+ case AF_INET6:
+ peer->hdrsize = sizeof(struct ipv6hdr);
+ break;
+ default:
+ BUG();
+ }
+
+ switch (peer->srx.transport_type) {
+ case SOCK_DGRAM:
+ peer->hdrsize += sizeof(struct udphdr);
+ break;
+ default:
BUG();
}
@@ -285,11 +320,7 @@
struct rxrpc_peer *peer, *candidate;
unsigned long hash_key = rxrpc_peer_hash_key(local, srx);
- _enter("{%d,%d,%pI4+%hu}",
- srx->transport_type,
- srx->transport_len,
- &srx->transport.sin.sin_addr,
- ntohs(srx->transport.sin.sin_port));
+ _enter("{%pISp}", &srx->transport);
/* search the peer list first */
rcu_read_lock();
@@ -326,11 +357,7 @@
peer = candidate;
}
- _net("PEER %d {%d,%pI4+%hu}",
- peer->debug_id,
- peer->srx.transport_type,
- &peer->srx.transport.sin.sin_addr,
- ntohs(peer->srx.transport.sin.sin_port));
+ _net("PEER %d {%pISp}", peer->debug_id, &peer->srx.transport);
_leave(" = %p {u=%d}", peer, atomic_read(&peer->usage));
return peer;