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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/local_object.c
parent878cd3ba37f77ded9c85e9857e3182a7fe8f5dc3 (diff)
downloadlinux-stericsson-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/local_object.c')
-rw-r--r--net/rxrpc/local_object.c48
1 files changed, 24 insertions, 24 deletions
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index ff4864d550b8..17d79fd73ade 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -25,9 +25,6 @@
static void rxrpc_local_processor(struct work_struct *);
static void rxrpc_local_rcu(struct rcu_head *);
-static DEFINE_MUTEX(rxrpc_local_mutex);
-static LIST_HEAD(rxrpc_local_endpoints);
-
/*
* Compare a local to an address. Return -ve, 0 or +ve to indicate less than,
* same or greater than.
@@ -77,13 +74,15 @@ static long rxrpc_local_cmp_key(const struct rxrpc_local *local,
/*
* Allocate a new local endpoint.
*/
-static struct rxrpc_local *rxrpc_alloc_local(const struct sockaddr_rxrpc *srx)
+static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet,
+ const struct sockaddr_rxrpc *srx)
{
struct rxrpc_local *local;
local = kzalloc(sizeof(struct rxrpc_local), GFP_KERNEL);
if (local) {
atomic_set(&local->usage, 1);
+ local->rxnet = rxnet;
INIT_LIST_HEAD(&local->link);
INIT_WORK(&local->processor, rxrpc_local_processor);
init_rwsem(&local->defrag_sem);
@@ -105,7 +104,7 @@ static struct rxrpc_local *rxrpc_alloc_local(const struct sockaddr_rxrpc *srx)
* create the local socket
* - must be called with rxrpc_local_mutex locked
*/
-static int rxrpc_open_socket(struct rxrpc_local *local)
+static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
{
struct sock *sock;
int ret, opt;
@@ -114,7 +113,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local)
local, local->srx.transport_type, local->srx.transport.family);
/* create a socket to represent the local endpoint */
- ret = sock_create_kern(&init_net, local->srx.transport.family,
+ ret = sock_create_kern(net, local->srx.transport.family,
local->srx.transport_type, 0, &local->socket);
if (ret < 0) {
_leave(" = %d [socket]", ret);
@@ -172,9 +171,11 @@ error:
/*
* Look up or create a new local endpoint using the specified local address.
*/
-struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
+struct rxrpc_local *rxrpc_lookup_local(struct net *net,
+ const struct sockaddr_rxrpc *srx)
{
struct rxrpc_local *local;
+ struct rxrpc_net *rxnet = rxrpc_net(net);
struct list_head *cursor;
const char *age;
long diff;
@@ -183,10 +184,10 @@ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
_enter("{%d,%d,%pISp}",
srx->transport_type, srx->transport.family, &srx->transport);
- mutex_lock(&rxrpc_local_mutex);
+ mutex_lock(&rxnet->local_mutex);
- for (cursor = rxrpc_local_endpoints.next;
- cursor != &rxrpc_local_endpoints;
+ for (cursor = rxnet->local_endpoints.next;
+ cursor != &rxnet->local_endpoints;
cursor = cursor->next) {
local = list_entry(cursor, struct rxrpc_local, link);
@@ -220,11 +221,11 @@ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
goto found;
}
- local = rxrpc_alloc_local(srx);
+ local = rxrpc_alloc_local(rxnet, srx);
if (!local)
goto nomem;
- ret = rxrpc_open_socket(local);
+ ret = rxrpc_open_socket(local, net);
if (ret < 0)
goto sock_error;
@@ -232,7 +233,7 @@ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *srx)
age = "new";
found:
- mutex_unlock(&rxrpc_local_mutex);
+ mutex_unlock(&rxnet->local_mutex);
_net("LOCAL %s %d {%pISp}",
age, local->debug_id, &local->srx.transport);
@@ -243,13 +244,13 @@ found:
nomem:
ret = -ENOMEM;
sock_error:
- mutex_unlock(&rxrpc_local_mutex);
+ mutex_unlock(&rxnet->local_mutex);
kfree(local);
_leave(" = %d", ret);
return ERR_PTR(ret);
addr_in_use:
- mutex_unlock(&rxrpc_local_mutex);
+ mutex_unlock(&rxnet->local_mutex);
_leave(" = -EADDRINUSE");
return ERR_PTR(-EADDRINUSE);
}
@@ -273,6 +274,7 @@ void __rxrpc_put_local(struct rxrpc_local *local)
static void rxrpc_local_destroyer(struct rxrpc_local *local)
{
struct socket *socket = local->socket;
+ struct rxrpc_net *rxnet = local->rxnet;
_enter("%d", local->debug_id);
@@ -286,9 +288,9 @@ static void rxrpc_local_destroyer(struct rxrpc_local *local)
}
local->dead = true;
- mutex_lock(&rxrpc_local_mutex);
+ mutex_lock(&rxnet->local_mutex);
list_del_init(&local->link);
- mutex_unlock(&rxrpc_local_mutex);
+ mutex_unlock(&rxnet->local_mutex);
ASSERT(RB_EMPTY_ROOT(&local->client_conns));
ASSERT(!local->service);
@@ -357,7 +359,7 @@ static void rxrpc_local_rcu(struct rcu_head *rcu)
/*
* Verify the local endpoint list is empty by this point.
*/
-void __exit rxrpc_destroy_all_locals(void)
+void rxrpc_destroy_all_locals(struct rxrpc_net *rxnet)
{
struct rxrpc_local *local;
@@ -365,15 +367,13 @@ void __exit rxrpc_destroy_all_locals(void)
flush_workqueue(rxrpc_workqueue);
- if (!list_empty(&rxrpc_local_endpoints)) {
- mutex_lock(&rxrpc_local_mutex);
- list_for_each_entry(local, &rxrpc_local_endpoints, link) {
+ if (!list_empty(&rxnet->local_endpoints)) {
+ mutex_lock(&rxnet->local_mutex);
+ list_for_each_entry(local, &rxnet->local_endpoints, link) {
pr_err("AF_RXRPC: Leaked local %p {%d}\n",
local, atomic_read(&local->usage));
}
- mutex_unlock(&rxrpc_local_mutex);
+ mutex_unlock(&rxnet->local_mutex);
BUG();
}
-
- rcu_barrier();
}