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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/call_accept.c
parent878cd3ba37f77ded9c85e9857e3182a7fe8f5dc3 (diff)
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/call_accept.c')
-rw-r--r--net/rxrpc/call_accept.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c
index 1752fcf8e8f1..a8515b0d4717 100644
--- a/net/rxrpc/call_accept.c
+++ b/net/rxrpc/call_accept.c
@@ -38,6 +38,7 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
{
const void *here = __builtin_return_address(0);
struct rxrpc_call *call;
+ struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
int max, tmp;
unsigned int size = RXRPC_BACKLOG_MAX;
unsigned int head, tail, call_head, call_tail;
@@ -79,7 +80,7 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
if (CIRC_CNT(head, tail, size) < max) {
struct rxrpc_connection *conn;
- conn = rxrpc_prealloc_service_connection(gfp);
+ conn = rxrpc_prealloc_service_connection(rxnet, gfp);
if (!conn)
return -ENOMEM;
b->conn_backlog[head] = conn;
@@ -136,9 +137,9 @@ static int rxrpc_service_prealloc_one(struct rxrpc_sock *rx,
write_unlock(&rx->call_lock);
- write_lock(&rxrpc_call_lock);
- list_add_tail(&call->link, &rxrpc_calls);
- write_unlock(&rxrpc_call_lock);
+ write_lock(&rxnet->call_lock);
+ list_add_tail(&call->link, &rxnet->calls);
+ write_unlock(&rxnet->call_lock);
b->call_backlog[call_head] = call;
smp_store_release(&b->call_backlog_head, (call_head + 1) & (size - 1));
@@ -185,6 +186,7 @@ int rxrpc_service_prealloc(struct rxrpc_sock *rx, gfp_t gfp)
void rxrpc_discard_prealloc(struct rxrpc_sock *rx)
{
struct rxrpc_backlog *b = rx->backlog;
+ struct rxrpc_net *rxnet = rxrpc_net(sock_net(&rx->sk));
unsigned int size = RXRPC_BACKLOG_MAX, head, tail;
if (!b)
@@ -209,10 +211,10 @@ void rxrpc_discard_prealloc(struct rxrpc_sock *rx)
tail = b->conn_backlog_tail;
while (CIRC_CNT(head, tail, size) > 0) {
struct rxrpc_connection *conn = b->conn_backlog[tail];
- write_lock(&rxrpc_connection_lock);
+ write_lock(&rxnet->conn_lock);
list_del(&conn->link);
list_del(&conn->proc_link);
- write_unlock(&rxrpc_connection_lock);
+ write_unlock(&rxnet->conn_lock);
kfree(conn);
tail = (tail + 1) & (size - 1);
}