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authorBryan Schumaker <bjschuma@netapp.com>2012-04-27 21:27:45 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-04-27 22:10:39 +0400
commit281cad46b34db4dbb1d1e603f7b9cfe25d1ae7c9 (patch)
treef13917030755776a4f80ffcc0d07c2b5da60066d /fs/nfs/nfs4namespace.c
parent2671bfc3beb44e70636bd0208274426db57f73b5 (diff)
downloadlinux-281cad46b34db4dbb1d1e603f7b9cfe25d1ae7c9.tar.xz
NFS: Create a submount rpc_op
This simplifies the code for v2 and v3 and gives v4 a chance to decide on referrals without needing to modify the generic client. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4namespace.c')
-rw-r--r--fs/nfs/nfs4namespace.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index a69ee3952bbe..80fc0fe7095e 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -329,7 +329,7 @@ out:
* @dentry - dentry of referral
*
*/
-struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry)
+static struct vfsmount *nfs_do_refmount(struct rpc_clnt *client, struct dentry *dentry)
{
struct vfsmount *mnt = ERR_PTR(-ENOMEM);
struct dentry *parent;
@@ -370,3 +370,25 @@ out:
dprintk("%s: done\n", __func__);
return mnt;
}
+
+struct vfsmount *nfs4_submount(struct nfs_server *server, struct dentry *dentry,
+ struct nfs_fh *fh, struct nfs_fattr *fattr)
+{
+ struct dentry *parent = dget_parent(dentry);
+ struct rpc_clnt *client;
+ struct vfsmount *mnt;
+
+ /* Look it up again to get its attributes and sec flavor */
+ client = nfs4_proc_lookup_mountpoint(parent->d_inode, &dentry->d_name, fh, fattr);
+ dput(parent);
+ if (IS_ERR(client))
+ return ERR_CAST(client);
+
+ if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
+ mnt = nfs_do_refmount(client, dentry);
+ else
+ mnt = nfs_do_submount(dentry, fh, fattr, client->cl_auth->au_flavor);
+
+ rpc_shutdown_client(client);
+ return mnt;
+}