[PATCH v5 2/2] lxc: Add HPET device into allowed devices
This commit is related to RTC timer device too. HPET is being shared
from host device through `localtime` clock. This timer is available
creating a new timer using `hpet` name.
Signed-off-by: Julio Faracco <jcfaracco(a)gmail.com>
---
docs/formatdomain.html.in | 2 +-
src/lxc/lxc_cgroup.c | 11 ++++++++++-
src/lxc/lxc_controller.c | 24 +++++++++++++++++++++++-
3 files changed, 34 insertions(+), 3 deletions(-)
diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 96d06e9c3e..d1d2955e51 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -2464,7 +2464,7 @@
The <code>name</code> attribute selects which timer is
being modified, and can be one of
"platform" (currently unsupported),
- "hpet" (libxl, xen, qemu), "kvmclock" (qemu),
+ "hpet" (libxl, xen, qemu, lxc), "kvmclock" (qemu),
"pit" (qemu), "rtc" (qemu, lxc), "tsc" (libxl,
qemu -
<span class="since">since 3.2.0</span>),
"hypervclock"
(qemu - <span class="since">since 1.2.2</span>) or
diff --git a/src/lxc/lxc_cgroup.c b/src/lxc/lxc_cgroup.c
index 065996b3a4..cb5d0da980 100644
--- a/src/lxc/lxc_cgroup.c
+++ b/src/lxc/lxc_cgroup.c
@@ -349,7 +349,6 @@ static int virLXCCgroupSetupDeviceACL(virDomainDefPtr def,
case VIR_DOMAIN_TIMER_NAME_KVMCLOCK:
case VIR_DOMAIN_TIMER_NAME_HYPERVCLOCK:
case VIR_DOMAIN_TIMER_NAME_PIT:
- case VIR_DOMAIN_TIMER_NAME_HPET:
case VIR_DOMAIN_TIMER_NAME_ARMVTIMER:
case VIR_DOMAIN_TIMER_NAME_LAST:
break;
@@ -363,6 +362,16 @@ static int virLXCCgroupSetupDeviceACL(virDomainDefPtr def,
VIR_DEBUG("Ignoring non-existent device /dev/rtc");
}
break;
+ case VIR_DOMAIN_TIMER_NAME_HPET:
+ if (virFileExists("/dev/hpet")) {
+ if (virCgroupAllowDevicePath(cgroup, "/dev/hpet",
+ VIR_CGROUP_DEVICE_READ,
+ false) < 0)
+ return -1;
+ } else {
+ VIR_DEBUG("Ignoring non-existent device /dev/hpet");
+ }
+ break;
}
}
diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
index d97c4ad1b5..8dcfd4c97e 100644
--- a/src/lxc/lxc_controller.c
+++ b/src/lxc/lxc_controller.c
@@ -1538,6 +1538,7 @@ virLXCControllerSetupTimers(virLXCControllerPtr ctrl)
struct stat sb;
virDomainDefPtr def = ctrl->def;
const char *rtc_dev = "/dev/rtc";
+ const char *hpet_dev = "/dev/hpet";
/* Not sync'ed with Host clock */
if (def->clock.offset != VIR_DOMAIN_CLOCK_OFFSET_LOCALTIME)
@@ -1557,7 +1558,6 @@ virLXCControllerSetupTimers(virLXCControllerPtr ctrl)
case VIR_DOMAIN_TIMER_NAME_KVMCLOCK:
case VIR_DOMAIN_TIMER_NAME_HYPERVCLOCK:
case VIR_DOMAIN_TIMER_NAME_PIT:
- case VIR_DOMAIN_TIMER_NAME_HPET:
case VIR_DOMAIN_TIMER_NAME_ARMVTIMER:
case VIR_DOMAIN_TIMER_NAME_LAST:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
@@ -1583,6 +1583,28 @@ virLXCControllerSetupTimers(virLXCControllerPtr ctrl)
return -1;
}
+ if (lxcContainerChown(ctrl->def, path) < 0)
+ return -1;
+ break;
+ case VIR_DOMAIN_TIMER_NAME_HPET:
+ if (stat(hpet_dev, &sb) < 0) {
+ virReportSystemError(errno, _("Unable to access %s"),
+ hpet_dev);
+ return -1;
+ }
+
+ path = g_strdup_printf("/%s/%s.dev/%s", LXC_STATE_DIR,
+ ctrl->def->name, "/hpet");
+
+ dev = makedev(major(sb.st_rdev), minor(sb.st_rdev));
+ if (mknod(path, S_IFCHR, dev) < 0 ||
+ chmod(path, sb.st_mode)) {
+ virReportSystemError(errno,
+ _("Failed to make device %s"),
+ path);
+ return -1;
+ }
+
if (lxcContainerChown(ctrl->def, path) < 0)
return -1;
break;
--
2.24.1