External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-12-24 22:55:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix QEMU domain save to block devices with cgroups enabled

Browse Source 
When cgroups is enabled, access to block devices is likely to be
restricted to a whitelist. Prior to saving a guest to a block device,
it is necessary to add the block device to the whitelist. This is
not required upon restore, since QEMU reads from stdin

* src/qemu/qemu_driver.c: Add block device to cgroups whitelist
  if neccessary during domain save.
This commit is contained in:
Daniel P. Berrange 2010-04-21 16:44:40 +01:00
parent 93e0b3c8d6
commit 712048bd9a
1 changed files with 39 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/qemu/qemu_driver.c
View File

@ -4716,6 +4716,7 @@ static int qemudDomainSaveFlag(virDomainPtr dom, const char *path,
struct stat sb;
int is_reg = 0;
unsigned long long offset;
virCgroupPtr cgroup = NULL;
memset(&header, 0, sizeof(header));
memcpy(header.magic, QEMUD_SAVE_MAGIC, sizeof(header.magic));
@ -4923,6 +4924,23 @@ static int qemudDomainSaveFlag(virDomainPtr dom, const char *path,
}
if (!is_reg &&
qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) {
if (virCgroupForDomain(driver->cgroup, vm->def->name, &cgroup, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to find cgroup for %s\n"),
vm->def->name);
goto endjob;
}
rc = virCgroupAllowDevicePath(cgroup, path);
if (rc != 0) {
virReportSystemError(-rc,
_("Unable to allow device %s for %s"),
path, vm->def->name);
goto endjob;
}
}
if ((!bypassSecurityDriver) &&
driver->securityDriver &&
driver->securityDriver->domainSetSavedStateLabel &&
@ -4960,6 +4978,16 @@ static int qemudDomainSaveFlag(virDomainPtr dom, const char *path,
driver->securityDriver->domainRestoreSavedStateLabel(vm, path) == -1)
goto endjob;
if (cgroup != NULL) {
rc = virCgroupDenyDevicePath(cgroup, path);
if (rc != 0) {
virReportSystemError(-rc,
_("Unable to deny device %s for %s"),
path, vm->def->name);
goto endjob;
}
}
ret = 0;
/* Shut it down */
@ -4986,6 +5014,16 @@ endjob:
vm->state = VIR_DOMAIN_RUNNING;
}
if (ret != 0 && cgroup != NULL) {
rc = virCgroupDenyDevicePath(cgroup, path);
if (rc != 0) {
virReportSystemError(-rc,
_("Unable to deny device %s for %s"),
path, vm->def->name);
goto endjob;
}
}
if (qemuDomainObjEndJob(vm) == 0)
vm = NULL;
}
@ -4998,6 +5036,7 @@ cleanup:
virDomainObjUnlock(vm);
if (event)
qemuDomainEventQueue(driver, event);
virCgroupFree(&cgroup);
qemuDriverUnlock(driver);
return ret;
}