Re: [Qemu-devel] [PATCH] monitor: Add info qom-tree subcommand.

["Andreas Färber" <afaerber@suse.de>]

Hi Hani,

Am 27.04.2014 12:29, schrieb Hani Benhabiles:
> Signed-off-by: Hani Benhabiles <hani@linux.com>
> ---
> 
> Not sure whether the qobject stringifying functions could fit or be of some use
> elsewhere. Thus, I kept them as static near the only place where they are used
> at the moment.

Your "info qom-tree" reads quite similar to my proposed qom-tree script:
http://patchwork.ozlabs.org/patch/317224/

For HMP I had been working on a command "info qom-composition" that
emits a trimmed-down overview-style output, such as for x86_64:

(qemu) info qom-composition
/machine (pc-i440fx-2.1-machine)
  /peripheral-anon (container)
  /peripheral (container)
  /unattached (container)
    /sysbus (System)
    /device[0] (qemu64-x86_64-cpu)
      /apic (apic)
    /device[1] (kvmvapic)
    /device[2] (i440FX)
    /device[3] (PIIX3)
      /isa.0 (ISA)
    /device[4] (isa-i8259)
    /device[5] (isa-i8259)
    /device[6] (cirrus-vga)
    /device[7] (hpet)
    /device[8] (mc146818rtc)
    /device[9] (isa-pit)
    /device[10] (isa-pcspk)
    /device[11] (isa-serial)
    /device[12] (isa-parallel)
    /device[13] (i8042)
    /device[14] (vmport)
    /device[15] (vmmouse)
    /device[16] (port92)
    /device[17] (isa-fdc)
    /device[18] (e1000)
    /device[19] (piix3-ide)
      /ide.0 (IDE)
      /ide.1 (IDE)
    /device[20] (ide-cd)
    /device[21] (PIIX4_PM)
      /i2c (i2c-bus)
    /device[22] (smbus-eeprom)
    /device[23] (smbus-eeprom)
    /device[24] (smbus-eeprom)
    /device[25] (smbus-eeprom)
    /device[26] (smbus-eeprom)
    /device[27] (smbus-eeprom)
    /device[28] (smbus-eeprom)
    /device[29] (smbus-eeprom)
  /icc-bridge (icc-bridge)
    /icc (icc-bus)
  /fw_cfg (fw_cfg)
  /i440fx (i440FX-pcihost)
    /pci.0 (PCI)
    /ioapic (ioapic)

I believe both commands can coexist. Question is how.

My tree-walking implementation is not based on QMP and thus much
slimmer. I didn't have to care about printing properties yet - that I
deferred to a qom-get HMP command (which based on previous feedback we
should implement either way). Possibly we could rebase your patch onto
mine, adding an argument for whether or not to print the properties?

Compared to my script, your "info qom-tree" does not allow to change the
root, so I believe we would need to print from "/" on (rather than
"/machine"), for dumping RNG backends etc. as well. The alternative
would be having arguments to the command, for specifying root and/or
output style.

Regards,
Andreas

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