Hi, Shea Ako <hackingsma@xxxxxxxxx> writes: > I’ve been learning about and playing with configfs and functionfs to > create composite user space USB gadgets. My objective is to create a > composite USB gadget that incorporates a custom functionfs function of > my own creation along with some _real_ USB devices connected to my > linux platform. > > Is there an easy existing way to bundle _real_ USB devices into a > composite gadget like this or am I looking at writing my own user > space functionfs functions which handle wrapping and forwarding the > interfaces/endpoints/data of the connected _real_ USB devices? heh, you're really on your own. Sounds pretty interesting but you're gonna spend a lot of time with this :p > I haven’t found any documented existing way to do this, but I thought > I should ask before I go off an implement it myself as it seems that > this might be a use case which isn’t entirely off the wall and there > could already be support for this somewhere that I haven’t yet > encountered. I don't think anybody has done anything like this yet. The closest I got was to attach some USB sticks to host port via HUB, setup RAID and use that RAID as backing store for g_mass_storage, then connect g_mass_storage back to same host which has the RAID of several USB sticks (same machine has host and peripheral controllers). -- balbi
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