cifs: add initial reconfigure support

	smb3_cleanup_fs_context(ctx);

}

static int smb3_reconfigure(struct fs_context *fc)

/*

 * Compare the old and new proposed context during reconfigure

 * and check if the changes are compatible.

 */

static int smb3_verify_reconfigure_ctx(struct smb3_fs_context *new_ctx,

				       struct smb3_fs_context *old_ctx)

{

	// TODO:  struct smb3_fs_context *ctx = smb3_fc2context(fc);

	if (new_ctx->sectype != old_ctx->sectype) {

		cifs_dbg(VFS, "can not change sec during remount\n");

		return -EINVAL;

	}

	/* FIXME : add actual reconfigure */

	return 0;

}

static int smb3_reconfigure(struct fs_context *fc)

{

	struct smb3_fs_context *ctx = smb3_fc2context(fc);

	struct dentry *root = fc->root;

	struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb);

	int rc;

	rc = smb3_verify_reconfigure_ctx(ctx, cifs_sb->ctx);

	if (rc)

		return rc;

	/*

	 * Steal the UNC from the old and to be destroyed context.

	 */

	ctx->UNC = cifs_sb->ctx->UNC;

	cifs_sb->ctx->UNC = NULL;

	smb3_cleanup_fs_context_contents(cifs_sb->ctx);

	rc = smb3_fs_context_dup(cifs_sb->ctx, ctx);

	return rc;

}

static int smb3_fs_context_parse_param(struct fs_context *fc,

				      struct fs_parameter *param)

{