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>
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 2a9591b..e36fd8a 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -26,11 +26,6 @@
static DECLARE_DELAYED_WORK(nfs_automount_task, nfs_expire_automounts);
int nfs_mountpoint_expiry_timeout = 500 * HZ;
-static struct vfsmount *nfs_do_submount(struct dentry *dentry,
- struct nfs_fh *fh,
- struct nfs_fattr *fattr,
- rpc_authflavor_t authflavor);
-
/*
* nfs_path - reconstruct the path given an arbitrary dentry
* @base - used to return pointer to the end of devname part of path
@@ -118,35 +113,6 @@
return ERR_PTR(-ENAMETOOLONG);
}
-#ifdef CONFIG_NFS_V4
-static struct rpc_clnt *nfs_lookup_mountpoint(struct inode *dir,
- struct qstr *name,
- struct nfs_fh *fh,
- struct nfs_fattr *fattr)
-{
- int err;
-
- if (NFS_PROTO(dir)->version == 4)
- return nfs4_proc_lookup_mountpoint(dir, name, fh, fattr);
-
- err = NFS_PROTO(dir)->lookup(NFS_SERVER(dir)->client, dir, name, fh, fattr);
- if (err)
- return ERR_PTR(err);
- return rpc_clone_client(NFS_SERVER(dir)->client);
-}
-#else /* CONFIG_NFS_V4 */
-static inline struct rpc_clnt *nfs_lookup_mountpoint(struct inode *dir,
- struct qstr *name,
- struct nfs_fh *fh,
- struct nfs_fattr *fattr)
-{
- int err = NFS_PROTO(dir)->lookup(NFS_SERVER(dir)->client, dir, name, fh, fattr);
- if (err)
- return ERR_PTR(err);
- return rpc_clone_client(NFS_SERVER(dir)->client);
-}
-#endif /* CONFIG_NFS_V4 */
-
/*
* nfs_d_automount - Handle crossing a mountpoint on the server
* @path - The mountpoint
@@ -162,10 +128,9 @@
struct vfsmount *nfs_d_automount(struct path *path)
{
struct vfsmount *mnt;
- struct dentry *parent;
+ struct nfs_server *server = NFS_SERVER(path->dentry->d_inode);
struct nfs_fh *fh = NULL;
struct nfs_fattr *fattr = NULL;
- struct rpc_clnt *client;
dprintk("--> nfs_d_automount()\n");
@@ -181,21 +146,7 @@
dprintk("%s: enter\n", __func__);
- /* Look it up again to get its attributes */
- parent = dget_parent(path->dentry);
- client = nfs_lookup_mountpoint(parent->d_inode, &path->dentry->d_name, fh, fattr);
- dput(parent);
- if (IS_ERR(client)) {
- mnt = ERR_CAST(client);
- goto out;
- }
-
- if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
- mnt = nfs_do_refmount(client, path->dentry);
- else
- mnt = nfs_do_submount(path->dentry, fh, fattr, client->cl_auth->au_flavor);
- rpc_shutdown_client(client);
-
+ mnt = server->nfs_client->rpc_ops->submount(server, path->dentry, fh, fattr);
if (IS_ERR(mnt))
goto out;
@@ -268,10 +219,8 @@
* @authflavor - security flavor to use when performing the mount
*
*/
-static struct vfsmount *nfs_do_submount(struct dentry *dentry,
- struct nfs_fh *fh,
- struct nfs_fattr *fattr,
- rpc_authflavor_t authflavor)
+struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh,
+ struct nfs_fattr *fattr, rpc_authflavor_t authflavor)
{
struct nfs_clone_mount mountdata = {
.sb = dentry->d_sb,
@@ -304,3 +253,19 @@
dprintk("<-- nfs_do_submount() = %p\n", mnt);
return mnt;
}
+
+struct vfsmount *nfs_submount(struct nfs_server *server, struct dentry *dentry,
+ struct nfs_fh *fh, struct nfs_fattr *fattr)
+{
+ int err;
+ struct dentry *parent = dget_parent(dentry);
+
+ /* Look it up again to get its attributes */
+ err = server->nfs_client->rpc_ops->lookup(server->client, parent->d_inode,
+ &dentry->d_name, fh, fattr);
+ dput(parent);
+ if (err != 0)
+ return ERR_PTR(err);
+
+ return nfs_do_submount(dentry, fh, fattr, server->client->cl_auth->au_flavor);
+}