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authorDavid Howells <dhowells@redhat.com>2017-05-24 19:02:32 +0300
committerDavid S. Miller <davem@davemloft.net>2017-05-25 20:15:11 +0300
commit2baec2c3f854d1f79c7bb28386484e144e864a14 (patch)
tree4b416db84d3579fe825458d021951955d120ed69 /net/rxrpc/proc.c
parent878cd3ba37f77ded9c85e9857e3182a7fe8f5dc3 (diff)
downloadlinux-2baec2c3f854d1f79c7bb28386484e144e864a14.tar.xz
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/proc.c')
-rw-r--r--net/rxrpc/proc.c40
1 files changed, 28 insertions, 12 deletions
diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c
index b9bcfbfb095c..e92d8405b15a 100644
--- a/net/rxrpc/proc.c
+++ b/net/rxrpc/proc.c
@@ -30,19 +30,25 @@ static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
*/
static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
{
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
rcu_read_lock();
- read_lock(&rxrpc_call_lock);
- return seq_list_start_head(&rxrpc_calls, *_pos);
+ read_lock(&rxnet->call_lock);
+ return seq_list_start_head(&rxnet->calls, *_pos);
}
static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
- return seq_list_next(v, &rxrpc_calls, pos);
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ return seq_list_next(v, &rxnet->calls, pos);
}
static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
{
- read_unlock(&rxrpc_call_lock);
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ read_unlock(&rxnet->call_lock);
rcu_read_unlock();
}
@@ -52,10 +58,11 @@ static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
struct rxrpc_sock *rx;
struct rxrpc_peer *peer;
struct rxrpc_call *call;
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
rxrpc_seq_t tx_hard_ack, rx_hard_ack;
char lbuff[50], rbuff[50];
- if (v == &rxrpc_calls) {
+ if (v == &rxnet->calls) {
seq_puts(seq,
"Proto Local "
" Remote "
@@ -113,7 +120,8 @@ static const struct seq_operations rxrpc_call_seq_ops = {
static int rxrpc_call_seq_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &rxrpc_call_seq_ops);
+ return seq_open_net(inode, file, &rxrpc_call_seq_ops,
+ sizeof(struct seq_net_private));
}
const struct file_operations rxrpc_call_seq_fops = {
@@ -129,27 +137,34 @@ const struct file_operations rxrpc_call_seq_fops = {
*/
static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
{
- read_lock(&rxrpc_connection_lock);
- return seq_list_start_head(&rxrpc_connection_proc_list, *_pos);
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ read_lock(&rxnet->conn_lock);
+ return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
}
static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
loff_t *pos)
{
- return seq_list_next(v, &rxrpc_connection_proc_list, pos);
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ return seq_list_next(v, &rxnet->conn_proc_list, pos);
}
static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
{
- read_unlock(&rxrpc_connection_lock);
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+ read_unlock(&rxnet->conn_lock);
}
static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
{
struct rxrpc_connection *conn;
+ struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
char lbuff[50], rbuff[50];
- if (v == &rxrpc_connection_proc_list) {
+ if (v == &rxnet->conn_proc_list) {
seq_puts(seq,
"Proto Local "
" Remote "
@@ -197,7 +212,8 @@ static const struct seq_operations rxrpc_connection_seq_ops = {
static int rxrpc_connection_seq_open(struct inode *inode, struct file *file)
{
- return seq_open(file, &rxrpc_connection_seq_ops);
+ return seq_open_net(inode, file, &rxrpc_connection_seq_ops,
+ sizeof(struct seq_net_private));
}
const struct file_operations rxrpc_connection_seq_fops = {