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NFS: handle blocklayout pipe PipeFS dentry by network namespace aware routines

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This patch makes blocklayout pipe dentry allocated and destroyed in network
namespace context by PipeFS network namespace aware routines.
Network namespace context is obtained from nfs_client structure.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky
2012-01-10 17:04:16 +04:00
committed by Trond Myklebust
parent eee17325f1
commit 332dfab6f4
1 changed files with 49 additions and 12 deletions
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61
fs/nfs/blocklayout/blocklayout.c
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@@ -1025,10 +1025,55 @@ static const struct rpc_pipe_ops bl_upcall_ops = {
.destroy_msg = bl_pipe_destroy_msg,
};
static struct dentry *nfs4blocklayout_register_sb(struct super_block *sb,
struct rpc_pipe *pipe)
{
struct dentry *dir, *dentry;
dir = rpc_d_lookup_sb(sb, NFS_PIPE_DIRNAME);
if (dir == NULL)
return ERR_PTR(-ENOENT);
dentry = rpc_mkpipe_dentry(dir, "blocklayout", NULL, pipe);
dput(dir);
return dentry;
}
static void nfs4blocklayout_unregister_sb(struct super_block *sb,
struct rpc_pipe *pipe)
{
if (pipe->dentry)
rpc_unlink(pipe->dentry);
}
static struct dentry *nfs4blocklayout_register_net(struct net *net,
struct rpc_pipe *pipe)
{
struct super_block *pipefs_sb;
struct dentry *dentry;
pipefs_sb = rpc_get_sb_net(net);
if (!pipefs_sb)
return ERR_PTR(-ENOENT);
dentry = nfs4blocklayout_register_sb(pipefs_sb, pipe);
rpc_put_sb_net(net);
return dentry;
}
static void nfs4blocklayout_unregister_net(struct net *net,
struct rpc_pipe *pipe)
{
struct super_block *pipefs_sb;
pipefs_sb = rpc_get_sb_net(net);
if (pipefs_sb) {
nfs4blocklayout_unregister_sb(pipefs_sb, pipe);
rpc_put_sb_net(net);
}
}
static int __init nfs4blocklayout_init(void)
{
struct vfsmount *mnt;
struct path path;
int ret;
dprintk("%s: NFSv4 Block Layout Driver Registering...\n", __func__);
@@ -1044,21 +1089,13 @@ static int __init nfs4blocklayout_init(void)
ret = PTR_ERR(mnt);
goto out_remove;
}
ret = vfs_path_lookup(mnt->mnt_root,
mnt,
NFS_PIPE_DIRNAME, 0, &path);
if (ret)
goto out_putrpc;
bl_device_pipe = rpc_mkpipe_data(&bl_upcall_ops, 0);
path_put(&path);
if (IS_ERR(bl_device_pipe)) {
ret = PTR_ERR(bl_device_pipe);
goto out_putrpc;
}
bl_device_pipe->dentry = rpc_mkpipe_dentry(path.dentry, "blocklayout",
NULL, bl_device_pipe);
bl_device_pipe->dentry = nfs4blocklayout_register_net(&init_net,
bl_device_pipe);
if (IS_ERR(bl_device_pipe->dentry)) {
ret = PTR_ERR(bl_device_pipe->dentry);
goto out_destroy_pipe;
@@ -1081,7 +1118,7 @@ static void __exit nfs4blocklayout_exit(void)
__func__);
pnfs_unregister_layoutdriver(&blocklayout_type);
rpc_unlink(bl_device_pipe->dentry);
nfs4blocklayout_unregister_net(&init_net, bl_device_pipe);
rpc_destroy_pipe_data(bl_device_pipe);
rpc_put_mount();
}