Re: [Qemu-block] [PATCH for-3.1 v10 01/31] block: Use bdrv_refresh_filename() to pull

[Alberto Garcia]

On Thu 09 Aug 2018 11:34:58 PM CEST, Max Reitz wrote:
> Before this patch, bdrv_refresh_filename() is used in a pushing manner:
> Whenever the BDS graph is modified, the parents of the modified edges
> are supposed to be updated (recursively upwards).  However, that is
> nonviable, considering that we want child changes not to concern
> parents.
>
> Also, in the long run we want a pull model anyway: Here, we would have a
> bdrv_filename() function which returns a BDS's filename, freshly
> constructed.
>
> This patch is an intermediate step.  It adds bdrv_refresh_filename()
> calls before every place a BDS.filename value is used.  The only
> exceptions are protocol drivers that use their own filename, which
> clearly would not profit from refreshing that filename before.
>
> Also, bdrv_get_encrypted_filename() is removed along the way (as a user
> of BDS.filename), since it is completely unused.
>
> In turn, all of the calls to bdrv_refresh_filename() before this patch
> are removed, because we no longer have to call this function on graph
> changes.
>
> Signed-off-by: Max Reitz <address@hidden>
> Reviewed-by: Eric Blake <address@hidden>

Reviewed-by: Alberto Garcia <address@hidden>

Berto