[PATCH v2 01/12] sunrpc: mount rpc_pipefs on initialization

Kirill A. Shutemov
2010-12-29T13:14:38Z

Mount rpc_pipefs on register_rpc_pipefs() and replace
rpc_get_mount()/rpc_put_mount() implementation with mntget()/mntput().

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
---
net/sunrpc/rpc_pipe.c | 27 ++++++++++++++++-----------
1 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 10a17a3..7f3fbdd 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -29,7 +29,6 @@
#include <linux/sunrpc/cache.h>

static struct vfsmount *rpc_mnt __read_mostly;
-static int rpc_mount_count;

static struct file_system_type rpc_pipe_fs_type;

@@ -415,18 +414,13 @@ struct rpc_filelist {

struct vfsmount *rpc_get_mount(void)
{
- int err;
-
- err = simple_pin_fs(&rpc_pipe_fs_type, &rpc_mnt, &rpc_mount_count);
- if (err != 0)
- return ERR_PTR(err);
- return rpc_mnt;
+ return mntget(rpc_mnt);
}
EXPORT_SYMBOL_GPL(rpc_get_mount);

void rpc_put_mount(void)
{
- simple_release_fs(&rpc_mnt, &rpc_mount_count);
+ mntput(rpc_mnt);
}
EXPORT_SYMBOL_GPL(rpc_put_mount);

@@ -1063,16 +1057,27 @@ int register_rpc_pipefs(void)
if (!rpc_inode_cachep)
return -ENOMEM;
err = register_filesystem(&rpc_pipe_fs_type);
- if (err) {
- kmem_cache_destroy(rpc_inode_cachep);
- return err;
+ if (err)
+ goto destroy_cache;
+
+ rpc_mnt = kern_mount(&rpc_pipe_fs_type);
+ if (IS_ERR(rpc_mnt)) {
+ err = PTR_ERR(rpc_mnt);
+ goto unregister_fs;
}

return 0;
+
+unregister_fs:
+ unregister_filesystem(&rpc_pipe_fs_type);
+destroy_cache:
+ kmem_cache_destroy(rpc_inode_cachep);
+ return err;
}

void unregister_rpc_pipefs(void)
{
+ mntput(rpc_mnt);
kmem_cache_destroy(rpc_inode_cachep);
unregister_filesystem(&rpc_pipe_fs_type);
}
--
1.7.3.4