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[Qemu-devel] Get a vm fd using kvm API's ioctls
From: |
Vincent KHERBACHE |
Subject: |
[Qemu-devel] Get a vm fd using kvm API's ioctls |
Date: |
Wed, 05 Feb 2014 16:51:00 +0100 |
Hi all,
I'm trying to get the dirty bitmap of a specific VM, using
KVM_GET_DIRTY_LOG ioctl.
For this purpose, I should be able to get the file descriptor of an
existing VM by doing something like :
kvm_fd = open("/dev/kvm")
...
b = ioctl(KVM_GET_DIRTY_LOG, vm_fd)
I also can see, from the API documentation
(https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt), that
there is the following restriction concerning VM ioctls :
"Only run VM ioctls from the same process (address space) that was used
to create the VM."
Is there a way to get the fd of a running VM (created from an other
process), or maybe a better/easier manner to get the dirty bitmap ?
Any help would be welcome.
Thanks,
--
Vincent KHERBACHE
PhD student at INRIA Sophia Antipolis (FRANCE)
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