Re: [Libguestfs] Fwd: [Qemu-devel] debugging qemu-nbd.c

>> libguestfs: qemu version 1.4 >> libguestfs: command: run: >> /home/skippy/Downloads/qemu/latest-build/install_dir/bin/qemu-system-x86_64 >> libguestfs: command: run: \ -nographic >> libguestfs: command: run: \ -machine accel=kvm:tcg >> libguestfs: command: run: \ -device ? >> libguestfs: [00025ms] finished testing qemu features >> libguestfs: [00025ms] r from fork: 13658 \n >> \ libguestfs: error: appliance closed the connection unexpectedly, >> see earlier error messages > > Either some output is missing, or something very strange is happening > in the appliance back end. Would advise adding lots more debugging to > the code that starts at this comment: > > if (r == 0) { /* Child (qemu). */ > > I don't think the error has anything to do with qemu-nbd. It doesn't > even get to the point where libguestfs prints the qemu command line. Maybe I mucked up libguestfs logging with my own logging... don't see how but it's possible. Here are the log statements I put in for the qemu-child. I ended with listing the args in g->app.cmdline just before this statement: execv (g->qemu, g->app.cmdline); /* Run qemu. */ in guestfs forked child - pid for qemu process: 29439 qemu child - before if (has_appliance_drive) qemu child - before Set up virtio-serial qemu child - before Dump the command line (after setting up stderr) qemu child - before * Put qemu in a new process group. * /usr/local/bin/qemu-system-x86_64 -global virtio-blk-pci.scsi=off -nodefconfig -nodefaults -nographic -device virtio-scsi-pci,id=scsi -drive file=nbd:localhost:3000,format=raw,id=hd0,if=none