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  over 3 years ago by dmdiss | Reply

  With hackweek now over, below is a summary of what I achieved. I decided to prioritize learning a new language, which saw me use Rust for the implementation. This slowed me down quite a bit, leaving:

  • revisited current upstream lkl state
    • found current UML merge submissions lack Android support, so instead fell-back to thehajime's lkl-next repo
  • rebased ceph-walkley (from hw19) against lkl-v5.10
  • submitted a couple of minor PRs upstream: 1 and 2
  • rebased ceph-walkley's embedded wireguard library against upstream
  • reworked the ceph-walkley build process to better handle kconfig and parallel build jobs
  • learned Rust's bindgen to generate lkl_host and libusb language bindings
  • investigated Linux's functionfs gadget API, mostly via the upstream example
  • wrote basic lkl boot / init program in Rust
  • wrote libusb dev/config/interface/endpoint enumeration utility in Rust

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Edit Comment 5534
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With hackweek now over, below is a summary of what I achieved. I decided to prioritize learning a new language, which saw me use Rust for the implementation. This slowed me down quite a bit, leaving: - revisited current upstream lkl state - found current UML merge submissions lack Android support, so instead fell-back to thehajime's lkl-next repo - rebased [ceph-walkley](https://gitlab.com/ceph-walkley/walkley) (from hw19) against [lkl-v5.10](https://github.com/thehajime/lkl-next) - submitted a couple of minor PRs upstream: [1](https://github.com/thehajime/lkl-next/pull/1) and [2](https://github.com/thehajime/lkl-next/pull/2) - rebased ceph-walkley's embedded wireguard library against upstream - reworked the ceph-walkley build process to better handle kconfig and parallel build jobs - learned Rust's bindgen to generate lkl_host and libusb language bindings - investigated Linux's functionfs gadget API, mostly via the upstream [example](https://elixir.bootlin.com/linux/latest/source/tools/usb/ffs-aio-example/multibuff/device_app/aio_multibuff.c) - wrote basic lkl boot / init program in Rust - wrote libusb dev/config/interface/endpoint enumeration utility in Rust
 
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Reply to dmdiss
With hackweek now over, below is a summary of what I achieved. I decided to prioritize learning a new language, which saw me use Rust for the implementation. This slowed me down quite a bit, leaving:
• revisited current upstream lkl state
  • found current UML merge submissions lack Android support, so instead fell-back to thehajime's lkl-next repo
• rebased ceph-walkley (from hw19) against lkl-v5.10
• submitted a couple of minor PRs upstream: 1 and 2
• rebased ceph-walkley's embedded wireguard library against upstream
• reworked the ceph-walkley build process to better handle kconfig and parallel build jobs
• learned Rust's bindgen to generate lkl_host and libusb language bindings
• investigated Linux's functionfs gadget API, mostly via the upstream example
• wrote basic lkl boot / init program in Rust
• wrote libusb dev/config/interface/endpoint enumeration utility in Rust
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  over 3 years ago by dmdiss | Reply

  I've published my Hackweek 20 source code at https://github.com/ddiss/walkley-usb. This is my first proper Rust project, which probably shows. To build, it requires lkl-next-5.10 liblkl at $LKL_DIR, which will be statically linked.

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Edit Comment 5548
# A First Level Header
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I've published my Hackweek 20 source code at [https://github.com/ddiss/walkley-usb](https://github.com/ddiss/walkley-usb). This is my first proper Rust project, which probably shows. To build, it requires [lkl-next-5.10 liblkl](https://gitlab.com/ceph-walkley/linux.git) at `$LKL_DIR`, which will be statically linked.
 
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Reply to dmdiss
I've published my Hackweek 20 source code at https://github.com/ddiss/walkley-usb. This is my first proper Rust project, which probably shows. To build, it requires lkl-next-5.10 liblkl at $LKL_DIR, which will be statically linked.
---
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  over 2 years ago by dmdiss | Reply

  I plan on continuing with this project during the upcoming Hackweek 21. Upstream LKL appears to be lagging behind mainline a bit, so I'll probably start there. After that I'd like to get the USB host device <-> LKL GadgetFS driver <-> LKL dummy-hcd loopback I/O path working on "regular" openSUSE Linux first before attempting to port to Android.

  • 

    over 2 years ago by dmdiss | Reply

    I've pushed my work from Hack Week 21 to https://github.com/ddiss/walkley . USB device pass-through configuration is triggered via the ./walkley --usb VENDOR_ID:PRODUCT_ID where VENDOR_ID and PRODUCT_ID match a host-connected USB device.

    USB I/O proxying between host chardev and lkl functionfs endpoints needs more work and hasn't been merged yet.

    Demo:

    ``` Host shell: walkley (main)> lsusb ... Bus 004 Device 002: ID 11b0:3307 ATECH FLASH TECHNOLOGY UHSII uSD Reader

    walkley (main)> make -j3 DEBUG=yes LKLCONFIG=lklusbconfig && ./walkley --usb 11b0:3307

    [ 0.014564] dummyhcd dummyhcd.0: USB Host+Gadget Emulator, driver 02 May 2005 [ 0.014576] dummyhcd dummyhcd.0: Dummy host controller [ 0.014589] dummyhcd dummyhcd.0: new USB bus registered, assigned bus number 1 [ 0.014792] hub 1-0:1.0: USB hub found [ 0.014813] hub 1-0:1.0: 1 port detected [ 0.015186] Btrfs loaded, crc32c=crc32c-generic ... (walkley.c:865) checking USB bus at /dev/bus/usb/004 (walkley.c:884) opening USB device at /dev/bus/usb/004/002 (walkley.c:760) read 62 bytes data from /dev/bus/usb/004/002 /dev/bus/usb/002/003 Vendor=0x11b0 Product=0x3307 -> matched, proceeding with passthrough. (walkley.c:696) USB interface Class=8, SubClass=6, Protocol=80, Endpoints=2 [ 0.292754] file system registered (walkley.c:715) -> EP 9: IN (0x81) (walkley.c:723) -> Skipping non-endpoint type 0x30 (walkley.c:718) -> EP 22: OUT (0x2) (walkley.c:723) -> Skipping non-endpoint type 0x30

    walkley:/> cat /proc/mounts none / rootfs rw 0 0 proc /proc proc rw,relatime 0 0 configfs /configfs configfs rw,relatime 0 0 devtmpfs /dev devtmpfs rw,relatime 0 0 walkley /walkley_ffs functionfs rw,relatime 0 0

    walkley:/> cat /configfs/usbgadget/0x0/idProduct 0x3307 walkley:/> cat /configfs/usbgadget/0x0/idVendor 0x11b0 walkley:/> ls /walkley_ffs . .. ep0

    ```

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  Edit Comment 6494
  # A First Level Header
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  I've pushed my work from Hack Week 21 to https://github.com/ddiss/walkley . USB device pass-through configuration is triggered via the `./walkley --usb VENDOR_ID:PRODUCT_ID` where `VENDOR_ID` and `PRODUCT_ID` match a host-connected USB device. USB I/O proxying between host chardev and lkl functionfs endpoints needs more work and hasn't been merged yet. Demo: ``` Host shell: walkley (main)> lsusb ... Bus 004 Device 002: ID 11b0:3307 ATECH FLASH TECHNOLOGY UHSII uSD Reader walkley (main)> make -j3 DEBUG=yes LKL_CONFIG=lkl_usbconfig && ./walkley --usb 11b0:3307 [ 0.014564] dummy_hcd dummy_hcd.0: USB Host+Gadget Emulator, driver 02 May 2005 [ 0.014576] dummy_hcd dummy_hcd.0: Dummy host controller [ 0.014589] dummy_hcd dummy_hcd.0: new USB bus registered, assigned bus number 1 [ 0.014792] hub 1-0:1.0: USB hub found [ 0.014813] hub 1-0:1.0: 1 port detected [ 0.015186] Btrfs loaded, crc32c=crc32c-generic ... (walkley.c:865) checking USB bus at /dev/bus/usb/004 (walkley.c:884) opening USB device at /dev/bus/usb/004/002 (walkley.c:760) read 62 bytes data from /dev/bus/usb/004/002 /dev/bus/usb/002/003 Vendor=0x11b0 Product=0x3307 -> matched, proceeding with passthrough. (walkley.c:696) USB interface Class=8, SubClass=6, Protocol=80, Endpoints=2 [ 0.292754] file system registered (walkley.c:715) -> EP 9: IN (0x81) (walkley.c:723) -> Skipping non-endpoint type 0x30 (walkley.c:718) -> EP 22: OUT (0x2) (walkley.c:723) -> Skipping non-endpoint type 0x30 walkley:/> cat /proc/mounts none / rootfs rw 0 0 proc /proc proc rw,relatime 0 0 configfs /configfs configfs rw,relatime 0 0 devtmpfs /dev devtmpfs rw,relatime 0 0 walkley /walkley_ffs functionfs rw,relatime 0 0 walkley:/> cat /configfs/usb_gadget/0x0/idProduct 0x3307 walkley:/> cat /configfs/usb_gadget/0x0/idVendor 0x11b0 walkley:/> ls /walkley_ffs . .. ep0 ```
   
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  Reply to dmdiss
  I've pushed my work from Hack Week 21 to https://github.com/ddiss/walkley . USB device pass-through configuration is triggered via the ./walkley --usb VENDOR_ID:PRODUCT_ID where VENDOR_ID and PRODUCT_ID match a host-connected USB device.
  USB I/O proxying between host chardev and lkl functionfs endpoints needs more work and hasn't been merged yet.
  Demo:
  ``` Host shell: walkley (main)> lsusb ... Bus 004 Device 002: ID 11b0:3307 ATECH FLASH TECHNOLOGY UHSII uSD Reader
  walkley (main)> make -j3 DEBUG=yes LKLCONFIG=lklusbconfig && ./walkley --usb 11b0:3307
  [ 0.014564] dummyhcd dummyhcd.0: USB Host+Gadget Emulator, driver 02 May 2005 [ 0.014576] dummyhcd dummyhcd.0: Dummy host controller [ 0.014589] dummyhcd dummyhcd.0: new USB bus registered, assigned bus number 1 [ 0.014792] hub 1-0:1.0: USB hub found [ 0.014813] hub 1-0:1.0: 1 port detected [ 0.015186] Btrfs loaded, crc32c=crc32c-generic ... (walkley.c:865) checking USB bus at /dev/bus/usb/004 (walkley.c:884) opening USB device at /dev/bus/usb/004/002 (walkley.c:760) read 62 bytes data from /dev/bus/usb/004/002 /dev/bus/usb/002/003 Vendor=0x11b0 Product=0x3307 -> matched, proceeding with passthrough. (walkley.c:696) USB interface Class=8, SubClass=6, Protocol=80, Endpoints=2 [ 0.292754] file system registered (walkley.c:715) -> EP 9: IN (0x81) (walkley.c:723) -> Skipping non-endpoint type 0x30 (walkley.c:718) -> EP 22: OUT (0x2) (walkley.c:723) -> Skipping non-endpoint type 0x30
  walkley:/> cat /proc/mounts none / rootfs rw 0 0 proc /proc proc rw,relatime 0 0 configfs /configfs configfs rw,relatime 0 0 devtmpfs /dev devtmpfs rw,relatime 0 0 walkley /walkley_ffs functionfs rw,relatime 0 0
  walkley:/> cat /configfs/usbgadget/0x0/idProduct 0x3307 walkley:/> cat /configfs/usbgadget/0x0/idVendor 0x11b0 walkley:/> ls /walkley_ffs . .. ep0
  ```
  ---
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Edit Comment 5810
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I plan on continuing with this project during the upcoming Hackweek 21. Upstream LKL appears to be lagging behind mainline a bit, so I'll probably start there. After that I'd like to get the `USB host device <-> LKL GadgetFS driver <-> LKL dummy-hcd loopback` I/O path working on "regular" openSUSE Linux first before attempting to port to Android.
 
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Reply to dmdiss
I plan on continuing with this project during the upcoming Hackweek 21. Upstream LKL appears to be lagging behind mainline a bit, so I'll probably start there. After that I'd like to get the USB host device <-> LKL GadgetFS driver <-> LKL dummy-hcd loopback I/O path working on "regular" openSUSE Linux first before attempting to port to Android.
---
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