[lvm-devel] [PATCH] Print error if VG already exist.

[Petr Rockai]

Milan Broz <mbroz at redhat.com> writes:
> This test have to be moved because of new vg read error handling.

> @@ -55,8 +55,13 @@ int vgcreate(struct cmd_context *cmd, int argc, char **argv)
>  
>  	/* Create the new VG */
>  	vg = vg_create(cmd, vp_new.vg_name);
> -	if (vg_read_error(vg))
> -		goto_bad;
> +	if (vg_read_error(vg)) {
> +		if (vg_read_error(vg) == FAILED_EXIST)
> +			log_error("A volume group called %s already exists.", vp_new.vg_name);
> +		else
> +			log_error("Can't get lock for %s", vp_new.vg_name);
> +		goto bad;
> +	}

This is suspicious. In vg_create:

	if ((vg = vg_read_internal(cmd, vg_name, NULL, &consistent))) {
		log_error("A volume group called '%s' already exists.", vg_name);
		unlock_and_release_vg(cmd, vg, vg_name);
		return _vg_make_handle(cmd, NULL, FAILED_EXIST);
	}

So the code you are adding should not be needed, at least not for the
EXIST case.

Hmm. Ok, I see that the code is actually broken, since what fails is
already vg_lock_newname. I'd argue that it should be vg_lock_newname
that should be printing this, not vgcreate. Like this:

diff -u -p -r1.299 metadata.c
--- lib/metadata/metadata.c	24 Nov 2009 22:55:56 -0000	1.299
+++ lib/metadata/metadata.c	3 Dec 2009 20:11:56 -0000
@@ -3507,6 +3507,7 @@ uint32_t vg_lock_newname(struct cmd_cont
 
 	/* Found vgname so cannot reserve. */
 	unlock_vg(cmd, vgname);
+	log_error("A volume group called '%s' already exists.", vg_name);
 	return FAILED_EXIST;
 }

Yours,
   Petr.