I searched a lot about qemu and read its documentation but could not find any explaining its I/O stack. Specifically, I want to know about how an I/O request is created and what path it travels to reach where.

For example, here is Linux I/O stack and this good blog post traced the path of an I/O request through the Linux kernel source code.

Can anyone give me the same information about qemu's I/O stack?

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