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id128-util: Attempt to read UUID from /sys/hypervisor/uuid

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When using the Xen hypervisor the virtual machine UUID is exposed here.
This is useful when one needs stable IPv4 address assignment, e.g. for a
set of RAM nodes that are built from a template.
This commit is contained in:
Rafaël Kooi 2024-01-22 17:04:07 +01:00
parent 9603fd29f8
commit d2f2c20a6d
1 changed files with 2 additions and 0 deletions
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src/libsystemd/sd-id128/id128-util.c
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@ -234,6 +234,8 @@ int id128_get_product(sd_id128_t *ret) {
r = id128_read("/sys/class/dmi/id/product_uuid", ID128_FORMAT_UUID, &uuid);
if (r == -ENOENT)
r = id128_read("/proc/device-tree/vm,uuid", ID128_FORMAT_UUID, &uuid);
if (r == -ENOENT)
r = id128_read("/sys/hypervisor/uuid", ID128_FORMAT_UUID, &uuid);
if (r < 0)
return r;