fs/9p: switch vfsmount to use v9fs_get_new_inode

In the process of cleaning up inode number allocation, I noticed several functions which didn't use the standard helper
allocators.  This patch fixes the allocation in the mount entrypoint.
Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>

fs/9p/vfs_super.c

@@ -110,7 +110,6 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
 	struct inode *inode = NULL;
 	struct dentry *root = NULL;
 	struct v9fs_session_info *v9ses = NULL;
-	umode_t mode = 0777 | S_ISVTX;
 	struct p9_fid *fid;
 	int retval = 0;
 
@@ -140,7 +139,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
 	else
 		sb->s_d_op = &v9fs_dentry_operations;
 
-	inode = v9fs_get_inode(sb, S_IFDIR | mode, 0);
+	inode = v9fs_get_new_inode_from_fid(v9ses, fid, sb);
 	if (IS_ERR(inode)) {
 		retval = PTR_ERR(inode);
 		goto release_sb;
@@ -152,32 +151,6 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
 		goto release_sb;
 	}
 	sb->s_root = root;
-	if (v9fs_proto_dotl(v9ses)) {
-		struct p9_stat_dotl *st = NULL;
-
-		st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
-		if (IS_ERR(st)) {
-			retval = PTR_ERR(st);
-			goto release_sb;
-		}
-		d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
-		v9fs_stat2inode_dotl(st, d_inode(root), 0);
-		kfree(st);
-	} else {
-		struct p9_wstat *st = NULL;
-
-		st = p9_client_stat(fid);
-		if (IS_ERR(st)) {
-			retval = PTR_ERR(st);
-			goto release_sb;
-		}
-
-		d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
-		v9fs_stat2inode(st, d_inode(root), sb, 0);
-
-		p9stat_free(st);
-		kfree(st);
-	}
 	retval = v9fs_get_acl(inode, fid);
 	if (retval)
 		goto release_sb;