80 lines
2.9 KiB
Diff
80 lines
2.9 KiB
Diff
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From 37287585b6ba9a55065c8f94458f6db3c0abe0af Mon Sep 17 00:00:00 2001
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From: Thomas Blume <Thomas.Blume@suse.com>
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Date: Fri, 6 Jun 2014 16:36:45 +0200
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Subject: [PATCH] systemd-detect-virt: only discover Xen domU
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The current vm detection lacks the distinction between Xen dom0 and Xen domU.
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Both, dom0 and domU are running inside the hypervisor.
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Therefore systemd-detect-virt and the ConditionVirtualization directive detect
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dom0 as a virtual machine.
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dom0 is not using virtual devices but is accessing the real hardware.
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Therefore dom0 should be considered the virtualisation host and not a virtual
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machine.
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https://bugs.freedesktop.org/show_bug.cgi?id=77271
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---
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src/shared/virt.c | 34 +++++++++++++++++++++++++++-------
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1 file changed, 27 insertions(+), 7 deletions(-)
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diff --git src/shared/virt.c src/shared/virt.c
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index 1e227c5..774915f 100644
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--- src/shared/virt.c
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+++ src/shared/virt.c
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@@ -148,7 +148,7 @@ static int detect_vm_dmi(const char **_id) {
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/* Returns a short identifier for the various VM implementations */
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int detect_vm(const char **id) {
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- _cleanup_free_ char *hvtype = NULL, *cpuinfo_contents = NULL;
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+ _cleanup_free_ char *domcap = NULL, *cpuinfo_contents = NULL;
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static thread_local int cached_found = -1;
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static thread_local const char *cached_id = NULL;
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const char *_id = NULL;
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@@ -162,17 +162,37 @@ int detect_vm(const char **id) {
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return cached_found;
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}
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- /* Try high-level hypervisor sysfs file first:
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+ /* Try xen capabilities file first, if not found try high-level hypervisor sysfs file:
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*
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- * https://bugs.freedesktop.org/show_bug.cgi?id=61491 */
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- r = read_one_line_file("/sys/hypervisor/type", &hvtype);
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+ * https://bugs.freedesktop.org/show_bug.cgi?id=77271 */
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+ r = read_one_line_file("/proc/xen/capabilities", &domcap);
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if (r >= 0) {
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- if (streq(hvtype, "xen")) {
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+ char *cap, *i = domcap;
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+
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+ while ((cap = strsep(&i, ",")))
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+ if (streq(cap, "control_d"))
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+ break;
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+
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+ if (!i) {
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_id = "xen";
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r = 1;
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- goto finish;
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}
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- } else if (r != -ENOENT)
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+
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+ goto finish;
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+
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+ } else if (r == -ENOENT) {
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+ _cleanup_free_ char *hvtype = NULL;
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+
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+ r = read_one_line_file("/sys/hypervisor/type", &hvtype);
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+ if (r >= 0) {
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+ if (streq(hvtype, "xen")) {
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+ _id = "xen";
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+ r = 1;
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+ goto finish;
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+ }
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+ } else if (r != -ENOENT)
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+ return r;
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+ } else
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return r;
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/* this will set _id to "other" and return 0 for unknown hypervisors */
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--
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1.7.9.2
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