Re: [PATCH v2 04/14] src: introducing hypervisor/domain_cgroup.c

There is duplicated code between virt drivers that needs to be moved to avoid code repetition. In the case of duplicated code between lxc_cgroup.c and qemu_cgroup.c a common place would be utils/vircgroup.c. The problem is that this would introduce /conf related definitions that shouldn't be imported to vircgroup.c, which is supposed to be a place for utilitary cgroups functions only. And syntax-check would forbid it anyway due to cross-directory includes being used. An alternative would be to overload domain_conf.c, which already contains all the definitions required. But that file is already crowded with XML handling code and we wouldn't do any favors to it by putting more utilitary, non-XML parsing/formatting code there. In [1], Colesuggested a 'domain_cgroup' file to host common code

between lxc_cgroup and qemu_cgroup, and Daniel suggested a 'src/hypervisor' dir to host these type of files. This patch introduces src/hypervisor/domain_cgroup.c and, to get started, introduces a new virDomainCgroupSetupBlkio() function to host shared code between virLXCCgroupSetupBlkioTune() and qemuSetupBlkioCgroup(). [1] https://www.redhat.com/archives/libvir-list/2019-December/msg00817.html Signed-off-by: Daniel Henrique Barboza <danielhb413(a)gmail.com&gt; --- src/Makefile.am | 1 + src/hypervisor/Makefile.inc.am | 14 +++++++ src/hypervisor/domain_cgroup.c | 67 ++++++++++++++++++++++++++++++++++ src/hypervisor/domain_cgroup.h | 27 ++++++++++++++ src/libvirt_private.syms | 4 ++ src/lxc/Makefile.inc.am | 2 + src/lxc/lxc_cgroup.c | 40 +------------------- src/qemu/Makefile.inc.am | 1 + src/qemu/qemu_cgroup.c | 40 +------------------- 9 files changed, 120 insertions(+), 76 deletions(-) create mode 100644 src/hypervisor/Makefile.inc.am create mode 100644 src/hypervisor/domain_cgroup.c create mode 100644 src/hypervisor/domain_cgroup.h