Re: [libvirt] [PATCH RFC 5/5] lxc: adds save and restore support

Add support for saving an lxc domain's state into files with lxcDomainSave and restore from file with lxcDomainRestore. Usage: virsh save [domain-name] [domain-id or domain-uuid] [directory name] Signed-off-by: Katerina Koukiou <k.koukiou(a)gmail.com&gt; --- src/lxc/lxc_driver.c | 234 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 234 insertions(+) diff --git a/src/lxc/lxc_driver.c b/src/lxc/lxc_driver.c index bd47c91..cc05eef 100644 --- a/src/lxc/lxc_driver.c +++ b/src/lxc/lxc_driver.c @@ -84,6 +84,7 @@ #include "virhostdev.h" #include "netdev_bandwidth_conf.h" +#include "lxc_criu.h" #define VIR_FROM_THIS VIR_FROM_LXC VIR_LOG_INIT("lxc.lxc_driver"); @@ -3205,6 +3206,235 @@ static int lxcDomainResume(virDomainPtr dom) } static int +lxcDoDomainSave(virLXCDriverPtr driver, virDomainObjPtr vm, + const char *to) +{ + int ret = -1; + virCapsPtr caps = NULL; + uint32_t xml_len = -1; + char *xml = NULL; + char xmlLen[33]; + char *xml_image_path = NULL; + char *str = NULL; + + if (!(caps = virLXCDriverGetCapabilities(driver, false))) + goto cleanup; + + if ((xml = virDomainDefFormat(vm->def, caps, 0)) == NULL) + goto cleanup; + + if ((ret = lxcCriuDump(driver, vm, to)) != 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Failed to checkpoint domain with CRIU")); + goto cleanup; + } + + virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, + VIR_DOMAIN_SHUTOFF_SAVED); + + if (virAsprintf(&xml_image_path, "%s/xml-image", to) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("Failed to write image path")); + goto cleanup; + }