aboutsummaryrefslogtreecommitdiff
path: root/net/rxrpc/peer_object.c
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2017-05-24 17:02:32 +0100
committerDavid S. Miller <davem@davemloft.net>2017-05-25 13:15:11 -0400
commit2baec2c3f854d1f79c7bb28386484e144e864a14 (patch)
tree4b416db84d3579fe825458d021951955d120ed69 /net/rxrpc/peer_object.c
parent878cd3ba37f77ded9c85e9857e3182a7fe8f5dc3 (diff)
download96b-common-2baec2c3f854d1f79c7bb28386484e144e864a14.tar.gz
rxrpc: Support network namespacing
Support network namespacing in AF_RXRPC with the following changes: (1) All the local endpoint, peer and call lists, locks, counters, etc. are moved into the per-namespace record. (2) All the connection tracking is moved into the per-namespace record with the exception of the client connection ID tree, which is kept global so that connection IDs are kept unique per-machine. (3) Each namespace gets its own epoch. This allows each network namespace to pretend to be a separate client machine. (4) The /proc/net/rxrpc_xxx files are now called /proc/net/rxrpc/xxx and the contents reflect the namespace. fs/afs/ should be okay with this patch as it explicitly requires the current net namespace to be init_net to permit a mount to proceed at the moment. It will, however, need updating so that cells, IP addresses and DNS records are per-namespace also. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rxrpc/peer_object.c')
-rw-r--r--net/rxrpc/peer_object.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/net/rxrpc/peer_object.c b/net/rxrpc/peer_object.c
index 862eea6b266c..cfed3b27adf0 100644
--- a/net/rxrpc/peer_object.c
+++ b/net/rxrpc/peer_object.c
@@ -26,9 +26,6 @@
#include <net/ip6_route.h>
#include "ar-internal.h"
-static DEFINE_HASHTABLE(rxrpc_peer_hash, 10);
-static DEFINE_SPINLOCK(rxrpc_peer_hash_lock);
-
/*
* Hash a peer key.
*/
@@ -124,8 +121,9 @@ static struct rxrpc_peer *__rxrpc_lookup_peer_rcu(
unsigned long hash_key)
{
struct rxrpc_peer *peer;
+ struct rxrpc_net *rxnet = local->rxnet;
- hash_for_each_possible_rcu(rxrpc_peer_hash, peer, hash_link, hash_key) {
+ hash_for_each_possible_rcu(rxnet->peer_hash, peer, hash_link, hash_key) {
if (rxrpc_peer_cmp_key(peer, local, srx, hash_key) == 0) {
if (atomic_read(&peer->usage) == 0)
return NULL;
@@ -301,13 +299,14 @@ struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *local,
struct rxrpc_peer *prealloc)
{
struct rxrpc_peer *peer;
+ struct rxrpc_net *rxnet = local->rxnet;
unsigned long hash_key;
hash_key = rxrpc_peer_hash_key(local, &prealloc->srx);
prealloc->local = local;
rxrpc_init_peer(prealloc, hash_key);
- spin_lock(&rxrpc_peer_hash_lock);
+ spin_lock(&rxnet->peer_hash_lock);
/* Need to check that we aren't racing with someone else */
peer = __rxrpc_lookup_peer_rcu(local, &prealloc->srx, hash_key);
@@ -315,10 +314,10 @@ struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *local,
peer = NULL;
if (!peer) {
peer = prealloc;
- hash_add_rcu(rxrpc_peer_hash, &peer->hash_link, hash_key);
+ hash_add_rcu(rxnet->peer_hash, &peer->hash_link, hash_key);
}
- spin_unlock(&rxrpc_peer_hash_lock);
+ spin_unlock(&rxnet->peer_hash_lock);
return peer;
}
@@ -329,6 +328,7 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
struct sockaddr_rxrpc *srx, gfp_t gfp)
{
struct rxrpc_peer *peer, *candidate;
+ struct rxrpc_net *rxnet = local->rxnet;
unsigned long hash_key = rxrpc_peer_hash_key(local, srx);
_enter("{%pISp}", &srx->transport);
@@ -350,17 +350,17 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
return NULL;
}
- spin_lock_bh(&rxrpc_peer_hash_lock);
+ spin_lock_bh(&rxnet->peer_hash_lock);
/* Need to check that we aren't racing with someone else */
peer = __rxrpc_lookup_peer_rcu(local, srx, hash_key);
if (peer && !rxrpc_get_peer_maybe(peer))
peer = NULL;
if (!peer)
- hash_add_rcu(rxrpc_peer_hash,
+ hash_add_rcu(rxnet->peer_hash,
&candidate->hash_link, hash_key);
- spin_unlock_bh(&rxrpc_peer_hash_lock);
+ spin_unlock_bh(&rxnet->peer_hash_lock);
if (peer)
kfree(candidate);
@@ -379,11 +379,13 @@ struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *local,
*/
void __rxrpc_put_peer(struct rxrpc_peer *peer)
{
+ struct rxrpc_net *rxnet = peer->local->rxnet;
+
ASSERT(hlist_empty(&peer->error_targets));
- spin_lock_bh(&rxrpc_peer_hash_lock);
+ spin_lock_bh(&rxnet->peer_hash_lock);
hash_del_rcu(&peer->hash_link);
- spin_unlock_bh(&rxrpc_peer_hash_lock);
+ spin_unlock_bh(&rxnet->peer_hash_lock);
kfree_rcu(peer, rcu);
}