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Date: Wed, 14 Dec 2011 14:45:13 +0300
From: Stanislav Kinsbursky <skinsbursky@...allels.com>
To: Trond.Myklebust@...app.com
Cc: linux-nfs@...r.kernel.org, xemul@...allels.com, neilb@...e.de,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
jbottomley@...allels.com, bfields@...ldses.org,
davem@...emloft.net, devel@...nvz.org
Subject: [PATCH 04/11] SUNRPC: per-net sysctl's set introduced
This patch introduces per-net sysctl set and it's initialization routines. Also
it modifies sysctl's registering helpers to make them use these sets.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
---
include/linux/sunrpc/debug.h | 7 ++++++-
net/sunrpc/netns.h | 3 +++
net/sunrpc/sunrpc_syms.c | 13 ++++++++++++-
net/sunrpc/sysctl.c | 38 +++++++++++++++++++++++++++++++++-----
net/sunrpc/xprtrdma/transport.c | 2 +-
net/sunrpc/xprtsock.c | 2 +-
6 files changed, 56 insertions(+), 9 deletions(-)
diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h
index b5e0c46..f2d825c 100644
--- a/include/linux/sunrpc/debug.h
+++ b/include/linux/sunrpc/debug.h
@@ -67,7 +67,12 @@ extern unsigned int nlm_debug;
void rpc_register_sysctl(void);
void rpc_unregister_sysctl(void);
-struct ctl_table_header *register_sunrpc_sysctl(struct ctl_table *);
+struct net;
+struct ctl_table;
+int debug_sysctl_init(struct net *);
+void debug_sysctl_exit(struct net *);
+struct ctl_table_header *register_sunrpc_sysctl(struct net *,
+ struct ctl_table *);
#endif
diff --git a/net/sunrpc/netns.h b/net/sunrpc/netns.h
index 6010c46..a949ddb 100644
--- a/net/sunrpc/netns.h
+++ b/net/sunrpc/netns.h
@@ -12,6 +12,9 @@ struct sunrpc_net {
struct list_head all_clients;
spinlock_t rpc_client_lock;
+#ifdef RPC_DEBUG
+ struct ctl_table_set sysctls;
+#endif
};
extern int sunrpc_net_id;
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index e57aa10..44759e9 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -38,11 +38,19 @@ static __net_init int sunrpc_init_net(struct net *net)
err = ip_map_cache_create(net);
if (err)
goto err_ipmap;
-
+#ifdef RPC_DEBUG
+ err = debug_sysctl_init(net);
+ if (err)
+ goto err_sysctl;
+#endif
INIT_LIST_HEAD(&sn->all_clients);
spin_lock_init(&sn->rpc_client_lock);
return 0;
+#ifdef RPC_DEBUG
+err_sysctl:
+ ip_map_cache_destroy(net);
+#endif
err_ipmap:
rpc_proc_exit(net);
err_proc:
@@ -51,6 +59,9 @@ err_proc:
static __net_exit void sunrpc_exit_net(struct net *net)
{
+#ifdef RPC_DEBUG
+ debug_sysctl_exit(net);
+#endif
ip_map_cache_destroy(net);
rpc_proc_exit(net);
}
diff --git a/net/sunrpc/sysctl.c b/net/sunrpc/sysctl.c
index f6e7da2..adebf0a 100644
--- a/net/sunrpc/sysctl.c
+++ b/net/sunrpc/sysctl.c
@@ -40,7 +40,7 @@ EXPORT_SYMBOL_GPL(nlm_debug);
#ifdef RPC_DEBUG
#include <linux/nsproxy.h>
-#include <net/net_namespace.h>
+#include "netns.h"
static struct ctl_table_header *sunrpc_table_header;
static ctl_table debug_table[];
@@ -50,23 +50,51 @@ struct ctl_path sunrpc_path[] = {
{ },
};
+static struct ctl_table_set *
+sunrpc_debug_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
+{
+ struct sunrpc_net *sn = net_generic(namespaces->net_ns, sunrpc_net_id);
+
+ return &sn->sysctls;
+}
+
static struct ctl_table_root sunrpc_debug_root = {
+ .lookup = sunrpc_debug_lookup,
};
-struct ctl_table_header *register_sunrpc_sysctl(struct ctl_table *table)
+struct ctl_table_header *register_sunrpc_sysctl(struct net *net,
+ struct ctl_table *table)
{
- return __register_sysctl_paths(&sunrpc_debug_root, current->nsproxy,
+ struct nsproxy namespaces;
+
+ namespaces = *current->nsproxy;
+ namespaces.net_ns = net;
+ return __register_sysctl_paths(&sunrpc_debug_root, &namespaces,
sunrpc_path, table);
}
EXPORT_SYMBOL_GPL(register_sunrpc_sysctl);
+int debug_sysctl_init(struct net *net)
+{
+ struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+
+ setup_sysctl_set(&sn->sysctls, NULL, NULL);
+ return 0;
+}
+
+void debug_sysctl_exit(struct net *net)
+{
+ struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+
+ WARN_ON(!list_empty(&sn->sysctls.list));
+}
+
void
rpc_register_sysctl(void)
{
if (!sunrpc_table_header) {
- setup_sysctl_set(&sunrpc_debug_root.default_set, NULL, NULL);
register_sysctl_root(&sunrpc_debug_root);
- sunrpc_table_header = register_sunrpc_sysctl(debug_table);
+ sunrpc_table_header = register_sunrpc_sysctl(&init_net, debug_table);
}
}
diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 53a8622..4a63b35 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -762,7 +762,7 @@ static int __init xprt_rdma_init(void)
#ifdef RPC_DEBUG
if (!sunrpc_table_header)
- sunrpc_table_header = register_sunrpc_sysctl(xr_tunables_table);
+ sunrpc_table_header = register_sunrpc_sysctl(&init_net, xr_tunables_table);
#endif
return 0;
}
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 6f1be96..1acc9a7 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2878,7 +2878,7 @@ int init_socket_xprt(void)
{
#ifdef RPC_DEBUG
if (!sunrpc_table_header)
- sunrpc_table_header = register_sunrpc_sysctl(xs_tunables_table);
+ sunrpc_table_header = register_sunrpc_sysctl(&init_net, xs_tunables_table);
#endif
xprt_register_transport(&xs_local_transport);
--
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