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block: Move flag inheritance to bdrv_open_inherit()

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Instead of letting every caller of bdrv_open() determine the right flags
for its child node manually and pass them to the function, pass the
parent node and the role of the newly opened child (like backing file,
protocol layer, etc.).

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2015-04-08 13:43:47 +02:00
parent 18edf289a8
commit f3930ed0bb
7 changed files with 78 additions and 22 deletions
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2
block/blkdebug.c
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@ -429,7 +429,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
/* Open the backing file */
assert(bs->file == NULL);
ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-image"), options, "image",
flags | BDRV_O_PROTOCOL, false, &local_err);
bs, &child_file, false, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;