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virStorageSourceIsSameLocation: Special-case storage sources of type 'volume'

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The function is used also to compare virStorageSource which may not be
resolved to the image at that point in which case the 'path' is not yet
populated and the actual type is not yet set. This means that the
function fails to consider two identical volume-based disks as pointing
to the same thing.

Add a special case for both images being type=volume in which case we
compare only the pool/volume names.

Closes: https://gitlab.com/libvirt/libvirt/-/issues/240
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Peter Krempa 2021-11-26 13:21:47 +01:00
parent c0b40323f8
commit f654464f7a
1 changed files with 7 additions and 0 deletions
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7
src/conf/storage_source_conf.c
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@ -920,6 +920,13 @@ virStorageSourceIsSameLocation(virStorageSource *a,
virStorageSourceIsEmpty(b))
return true;
/* for disk type=volume we must check just pool/volume names as they might
* not yet be resolved if e.g. we are comparing against the persistent def */
if (a->type == VIR_STORAGE_TYPE_VOLUME && b->type == VIR_STORAGE_TYPE_VOLUME) {
return STREQ(a->srcpool->pool, b->srcpool->pool) &&
STREQ(a->srcpool->volume, b->srcpool->volume);
}
if (virStorageSourceGetActualType(a) != virStorageSourceGetActualType(b))
return false;