On Tue, Jul 1, 2014 at 9:11 PM, Andy Grover <agrover@xxxxxxxxxx> wrote: > Shaohua Li wrote an initial implementation of this, late last year[1]. > Starting from that, I started working on some alternate implementation > choices, and ended up with something rather different. > > Please take a look and let me know what you think. Patch 1 is a > design and overview doc, and patch 2 is the actual code, along with > implementation rationale. > > Thanks -- Andy > > [1] http://thread.gmane.org/gmane.linux.scsi.target.devel/5044 > > Andy Grover (2): > target: Add documentation on the target userspace pass-through driver > target: Add a user-passthrough backstore > > Documentation/target/tcmu-design.txt | 210 +++++++ > drivers/target/Kconfig | 5 + > drivers/target/Makefile | 1 + > drivers/target/target_core_transport.c | 4 + > drivers/target/target_core_user.c | 1078 ++++++++++++++++++++++++++++++++ > drivers/target/target_core_user.h | 126 ++++ > 6 files changed, 1424 insertions(+) > create mode 100644 Documentation/target/tcmu-design.txt > create mode 100644 drivers/target/target_core_user.c > create mode 100644 drivers/target/target_core_user.h Hi Andy, Just wanted to let you know that a userspace backstore would potentially be useful for QEMU. QEMU supports a number of disk image formats (VMDK, VHDX, qcow2, and more). Make these available as SCSI LUNs on the host or to remote SCSI initiators is cool. We currently have a tool called qemu-nbd that exports disk images using the Network Block Device protocol. Your userspace backstore provides other options like iSCSI target or loopback access on the host. I took a quick look at the patch and imagine it's not hard to hook up to QEMU. Looks promising! Stefan -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
