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Context:

I would like to use an old phone as a USB Mass storage device/slave, but read/writes to a Network share. So I can attach it to the Kitchen TV and direct it to a windows/linux directory.

Attempt so far:

My test device is an unbranded tablet, which appears to try to clone a HTC Passion. I'm able to access network shares from it, and make a mount point on the SD card of device.

However, when I activate the "USB Mass Storage", it totally unmounts every thing related to the internal/external storage, so it is accessible via the usb cable to the Host computer only. ;(
When I remount the card and then remount the network share - it just makes it have a hissy-fit, and as you can guess its does not appear to read/write correctly.

Is there something available to do this?

Alternatively:

I’m kind-of familiar with USB programming from a Linux Host point of view, because I used to use /proc/bus/usb/devices lsusb… to know where to read/write the packets to. But I don’t know how to do a program to act as a client/slave device.

I’m not aware of how to access the USB interface because I do not know where the io-file/memory address point could possibly be?

Reading dmesg, /dev/bus/usb or /sys/bus/usb does not appear to help me.

I’m defiantly missing something here, due to lack of knowledge. :(
I know I’m asking to convert/overlay a block device on a network share, but I’ll worry about that later :)

  • Definitely not doable. Network share = high level network protocol (CIFS/FTP/etc) vs. USB mass storage = block device (which is a level below and interpreted using a FAT32 driver on Windows). There's no way you can transform a high level protocol into a lower level one. Period. Silly comparison: You want to serve apples (raw device) but you only have apple juice (net share). You'd need iSCSI or so across the network. – ce4 Dec 20 '12 at 1:30
  • Put it as answer! :-) – Flow Dec 20 '12 at 8:43
  • 1
    Found it "/sys/devices/platform/usb_mass_storage/lun#/file". Now just writing a basic block driver so its out of scope of this forum – Matt Dec 24 '12 at 7:13

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