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46193f4a59
New hash table functions are added that allow for multiple entries with the same key. Use of the vgname_to_vgid hash table is converted to these new functions since there are multiple entries in vgname_to_vgid that have the same key (vgname). When multiple VGs with the same name exist, commands that reference only a VG name will fail saying the VG could not be found (that error message could be improved.) Any command that works with the select option can access one of the VGs with -S vg_uuid=X. vgrename is a special case that allows the first VG name arg to be replaced by a uuid, which also works. (The existing hash table implementation is not well suited for handling this case, but it works ok with the new extensions. Changing lvmetad to use its own custom hash tables may be preferable at some point.)