Kernel/FUSE: Allow buffering multiple requests #24281
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It can be possible for a request to be blocked on another request, so this patch allows us to send more requests even when a request is already pending.
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Previously, it was assumed that only a single request can be pending for a FUSE instance, but we actually need to be able to send more requests even if there may be older requests pending response since requests can be blocked on other requests. In short, this means that recursively trying to list the mountpoint with the
passthroughexample from libfuse now works properly.This also does some other cleanups, including clarifying the license of
Definitions.h, doing a better job at filling out the request header, and improving debug output.