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src: introduce 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], Cole suggested 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@gmail.com> Signed-off-by: Ján Tomko <jtomko@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
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@ -108,6 +108,7 @@ include locking/Makefile.inc.am
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include admin/Makefile.inc.am
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include rpc/Makefile.inc.am
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include test/Makefile.inc.am
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include hypervisor/Makefile.inc.am
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include esx/Makefile.inc.am
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include hyperv/Makefile.inc.am
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include vmx/Makefile.inc.am
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14
src/hypervisor/Makefile.inc.am
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14
src/hypervisor/Makefile.inc.am
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@ -0,0 +1,14 @@
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# vim: filetype=automake
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HYPERVISOR_SOURCES = \
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hypervisor/domain_cgroup.h \
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hypervisor/domain_cgroup.c \
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$(NULL)
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noinst_LTLIBRARIES += libvirt_hypervisor.la
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libvirt_la_BUILT_LIBADD += libvirt_hypervisor.la
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libvirt_hypervisor_la_CFLAGS = \
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-I$(srcdir)/conf \
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$(AM_CFLAGS) \
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$(NULL)
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libvirt_hypervisor_la_SOURCES = $(HYPERVISOR_SOURCES)
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67
src/hypervisor/domain_cgroup.c
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67
src/hypervisor/domain_cgroup.c
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@ -0,0 +1,67 @@
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/*
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* domain_cgroup.c: cgroup functions shared between hypervisor drivers
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*
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* Copyright IBM Corp. 2020
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include "domain_cgroup.h"
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int
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virDomainCgroupSetupBlkio(virCgroupPtr cgroup, virDomainBlkiotune blkio)
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{
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size_t i;
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if (blkio.weight != 0 &&
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virCgroupSetBlkioWeight(cgroup, blkio.weight) < 0)
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return -1;
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if (blkio.ndevices) {
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for (i = 0; i < blkio.ndevices; i++) {
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virBlkioDevicePtr dev = &blkio.devices[i];
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if (dev->weight &&
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virCgroupSetupBlkioDeviceWeight(cgroup, dev->path,
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&dev->weight) < 0)
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return -1;
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if (dev->riops &&
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virCgroupSetupBlkioDeviceReadIops(cgroup, dev->path,
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&dev->riops) < 0)
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return -1;
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if (dev->wiops &&
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virCgroupSetupBlkioDeviceWriteIops(cgroup, dev->path,
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&dev->wiops) < 0)
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return -1;
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if (dev->rbps &&
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virCgroupSetupBlkioDeviceReadBps(cgroup, dev->path,
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&dev->rbps) < 0)
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return -1;
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if (dev->wbps &&
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virCgroupSetupBlkioDeviceWriteBps(cgroup, dev->path,
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&dev->wbps) < 0)
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return -1;
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}
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}
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return 0;
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}
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27
src/hypervisor/domain_cgroup.h
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27
src/hypervisor/domain_cgroup.h
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@ -0,0 +1,27 @@
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/*
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* domain_cgroup.h: cgroup functions shared between hypervisor drivers
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*
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* Copyright IBM Corp. 2020
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "vircgroup.h"
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#include "domain_conf.h"
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int virDomainCgroupSetupBlkio(virCgroupPtr cgroup, virDomainBlkiotune blkio);
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@ -1390,6 +1390,10 @@ virSetConnectSecret;
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virSetConnectStorage;
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# hypervisor/domain_cgroup.h
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virDomainCgroupSetupBlkio;
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# libvirt_internal.h
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virConnectSupportsFeature;
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virDomainMigrateBegin3;
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@ -97,6 +97,7 @@ libvirt_driver_lxc_impl_la_CFLAGS = \
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-I$(srcdir)/conf \
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-I$(builddir)/lxc \
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-I$(builddir)/rpc \
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-I$(srcdir)/hypervisor \
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$(AM_CFLAGS) \
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$(NULL)
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libvirt_driver_lxc_impl_la_LIBADD = \
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@ -221,6 +222,7 @@ libvirt_lxc_CFLAGS = \
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-I$(srcdir)/conf \
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-I$(builddir)/lxc \
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-I$(builddir)/rpc \
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-I$(srcdir)/hypervisor \
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$(AM_CFLAGS) \
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$(PIE_CFLAGS) \
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$(CAPNG_CFLAGS) \
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@ -23,6 +23,7 @@
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#include "lxc_cgroup.h"
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#include "lxc_container.h"
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#include "domain_cgroup.h"
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#include "virfile.h"
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#include "virerror.h"
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#include "virlog.h"
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@ -101,44 +102,7 @@ static int virLXCCgroupSetupCpusetTune(virDomainDefPtr def,
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static int virLXCCgroupSetupBlkioTune(virDomainDefPtr def,
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virCgroupPtr cgroup)
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{
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size_t i;
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if (def->blkio.weight &&
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virCgroupSetBlkioWeight(cgroup, def->blkio.weight) < 0)
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return -1;
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if (def->blkio.ndevices) {
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for (i = 0; i < def->blkio.ndevices; i++) {
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virBlkioDevicePtr dev = &def->blkio.devices[i];
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if (dev->weight &&
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virCgroupSetupBlkioDeviceWeight(cgroup, dev->path,
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&dev->weight) < 0)
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return -1;
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if (dev->riops &&
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virCgroupSetupBlkioDeviceReadIops(cgroup, dev->path,
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&dev->riops) < 0)
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return -1;
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if (dev->wiops &&
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virCgroupSetupBlkioDeviceWriteIops(cgroup, dev->path,
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&dev->wiops) < 0)
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return -1;
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if (dev->rbps &&
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virCgroupSetupBlkioDeviceReadBps(cgroup, dev->path,
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&dev->rbps) < 0)
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return -1;
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if (dev->wbps &&
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virCgroupSetupBlkioDeviceWriteBps(cgroup, dev->path,
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&dev->wbps) < 0)
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return -1;
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}
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}
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return 0;
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return virDomainCgroupSetupBlkio(cgroup, def->blkio);
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}
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@ -98,6 +98,7 @@ libvirt_driver_qemu_impl_la_CFLAGS = \
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-I$(builddir)/access \
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-I$(srcdir)/conf \
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-I$(srcdir)/secret \
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-I$(srcdir)/hypervisor \
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$(AM_CFLAGS) \
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$(NULL)
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libvirt_driver_qemu_impl_la_LDFLAGS = $(AM_LDFLAGS)
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@ -30,6 +30,7 @@
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#include "viralloc.h"
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#include "virerror.h"
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#include "domain_audit.h"
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#include "domain_cgroup.h"
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#include "virscsi.h"
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#include "virstring.h"
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#include "virfile.h"
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@ -591,7 +592,6 @@ static int
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qemuSetupBlkioCgroup(virDomainObjPtr vm)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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size_t i;
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if (!virCgroupHasController(priv->cgroup,
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VIR_CGROUP_CONTROLLER_BLKIO)) {
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@ -604,43 +604,7 @@ qemuSetupBlkioCgroup(virDomainObjPtr vm)
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}
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}
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if (vm->def->blkio.weight != 0 &&
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virCgroupSetBlkioWeight(priv->cgroup, vm->def->blkio.weight) < 0)
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return -1;
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if (vm->def->blkio.ndevices) {
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for (i = 0; i < vm->def->blkio.ndevices; i++) {
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virBlkioDevicePtr dev = &vm->def->blkio.devices[i];
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virCgroupPtr cgroup = priv->cgroup;
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if (dev->weight &&
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virCgroupSetupBlkioDeviceWeight(cgroup, dev->path,
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&dev->weight) < 0)
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return -1;
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if (dev->riops &&
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virCgroupSetupBlkioDeviceReadIops(cgroup, dev->path,
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&dev->riops) < 0)
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return -1;
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if (dev->wiops &&
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virCgroupSetupBlkioDeviceWriteIops(cgroup, dev->path,
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&dev->wiops) < 0)
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return -1;
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if (dev->rbps &&
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virCgroupSetupBlkioDeviceReadBps(cgroup, dev->path,
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&dev->rbps) < 0)
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return -1;
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if (dev->wbps &&
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virCgroupSetupBlkioDeviceWriteBps(cgroup, dev->path,
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&dev->wbps) < 0)
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return -1;
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}
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}
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return 0;
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return virDomainCgroupSetupBlkio(priv->cgroup, vm->def->blkio);
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}
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