file-posix: Update open_flags in raw_set_perm()
raw_check_perm() + raw_set_perm() can change the flags associated with the current FD. If so, we have to update BDRVRawState.open_flags accordingly. Otherwise, we may keep reopening the FD even though the current one already has the correct flags. Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NKevin Wolf <kwolf@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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