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| H A D | block.c | diff e855e4fb7b97f7f605e1f44427b98022e39e6f8f Mon Apr 28 17:29:54 CDT 2014 Jeff Cody <jcody@redhat.com> block: Ignore duplicate or NULL format_name in bdrv_iterate_format
Some block drivers have multiple BlockDriver instances with identical
format_name fields (e.g. gluster, nbd).
Both qemu-img and qemu will use bdrv_iterate_format() to list the
supported formats when a help option is invoked. As protocols and
formats may register multiple drivers, redundant listings of formats
occur (e.g., "Supported formats: ... gluster gluster gluster gluster ...
").
Since the list of driver formats will be small, this performs a simple
linear search on format_name, and ignores any duplicates.
The end result change is that the iterator will no longer receive
duplicate string names, nor will it receive NULL pointers.
Signed-off-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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