NFS: handle NFS caches dentries by network namespace aware routines
This patch makes NFS caches PipeFS dentries allocated and destroyed in network
namespace context by PipeFS network namespace aware routines.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c
index 9d79a2e..5dd017b 100644
--- a/fs/nfs/cache_lib.c
+++ b/fs/nfs/cache_lib.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/sunrpc/cache.h>
#include <linux/sunrpc/rpc_pipe_fs.h>
+#include <net/net_namespace.h>
#include "cache_lib.h"
@@ -111,20 +112,34 @@
return 0;
}
-int nfs_cache_register(struct cache_detail *cd)
+static int nfs_cache_register_sb(struct super_block *sb, struct cache_detail *cd)
+{
+ int ret;
+ struct dentry *dir;
+
+ dir = rpc_d_lookup_sb(sb, "cache");
+ BUG_ON(dir == NULL);
+ ret = sunrpc_cache_register_pipefs(dir, cd->name, 0600, cd);
+ dput(dir);
+ return ret;
+}
+
+int nfs_cache_register_net(struct net *net, struct cache_detail *cd)
{
struct vfsmount *mnt;
- struct path path;
+ struct super_block *pipefs_sb;
int ret;
mnt = rpc_get_mount();
if (IS_ERR(mnt))
return PTR_ERR(mnt);
- ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &path);
- if (ret)
+ pipefs_sb = rpc_get_sb_net(net);
+ if (!pipefs_sb) {
+ ret = -ENOENT;
goto err;
- ret = sunrpc_cache_register_pipefs(path.dentry, cd->name, 0600, cd);
- path_put(&path);
+ }
+ ret = nfs_cache_register_sb(pipefs_sb, cd);
+ rpc_put_sb_net(net);
if (!ret)
return ret;
err:
@@ -132,10 +147,21 @@
return ret;
}
-void nfs_cache_unregister(struct cache_detail *cd)
+static void nfs_cache_unregister_sb(struct super_block *sb, struct cache_detail *cd)
{
- sunrpc_cache_unregister_pipefs(cd);
- sunrpc_destroy_cache_detail(cd);
+ if (cd->u.pipefs.dir)
+ sunrpc_cache_unregister_pipefs(cd);
+}
+
+void nfs_cache_unregister_net(struct net *net, struct cache_detail *cd)
+{
+ struct super_block *pipefs_sb;
+
+ pipefs_sb = rpc_get_sb_net(net);
+ if (pipefs_sb) {
+ nfs_cache_unregister_sb(pipefs_sb, cd);
+ rpc_put_sb_net(net);
+ }
rpc_put_mount();
}