[libvirt PATCH v2 1/5] qemu: fix populating NVRAM vars from template with R/W loader
Daniel P. Berrangé
berrange at redhat.com
Tue Feb 22 17:23:46 UTC 2022
The QEMU driver will populate the template to the nvram file any time it
sees both the template and nvram paths present. It will auto-generate a
nvram path per-VM if not provided by the user, but only if the loader
is marked R/O.
So with a R/O loader we have these possible scenarios
- No NVRAM path or template -> try to infer a template based on the
loader path, if not possible, fatal
error. Auto-generate NVRAM per per VM
- NVRAM path only -> try to infer a template based on the loader path,
if not possible, app must have pre-created NVRAM
- NVRAM path + template -> QEMU driver will copy template to NVRAM
- NVRAM template only -> auto-generate NVRAM path per VM and then
copy template
While with a R/W loader we have these possible scenarios
- No NVRAM path or template -> do nothing
- NVRAM path only -> app must have pre-created NVRAM
- NVRAM path + template -> QEMU driver will copy template to NVRAM
- NVRAM template only -> silently ignored
This change fixses the last scenario by making us auto-generate an
NVRAM path per VM, and then copy the template. We can't infer a
template based on the loaer path, but we align in other key areas.
Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---
src/qemu/qemu_domain.c | 6 ++-
...-nvram-rw-template-vars.x86_64-latest.args | 41 +++++++++++++++++++
.../bios-nvram-rw-template-vars.xml | 36 ++++++++++++++++
.../bios-nvram-rw-template.x86_64-latest.args | 41 +++++++++++++++++++
.../bios-nvram-rw-template.xml | 36 ++++++++++++++++
.../bios-nvram-rw-vars.x86_64-latest.args | 41 +++++++++++++++++++
tests/qemuxml2argvdata/bios-nvram-rw-vars.xml | 36 ++++++++++++++++
tests/qemuxml2argvtest.c | 3 ++
8 files changed, 238 insertions(+), 2 deletions(-)
create mode 100644 tests/qemuxml2argvdata/bios-nvram-rw-template-vars.x86_64-latest.args
create mode 100644 tests/qemuxml2argvdata/bios-nvram-rw-template-vars.xml
create mode 100644 tests/qemuxml2argvdata/bios-nvram-rw-template.x86_64-latest.args
create mode 100644 tests/qemuxml2argvdata/bios-nvram-rw-template.xml
create mode 100644 tests/qemuxml2argvdata/bios-nvram-rw-vars.x86_64-latest.args
create mode 100644 tests/qemuxml2argvdata/bios-nvram-rw-vars.xml
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index acc76c1cd6..14a558a7ac 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -4451,8 +4451,10 @@ qemuDomainDefPostParse(virDomainDef *def,
def->os.machine = g_strdup(machine);
}
- if (virDomainDefHasOldStyleROUEFI(def) &&
- !def->os.loader->nvram)
+ if (virDomainDefHasOldStyleUEFI(def) &&
+ !def->os.loader->nvram &&
+ (def->os.loader->readonly == VIR_TRISTATE_BOOL_YES ||
+ def->os.loader->nvramTemplate))
qemuDomainNVRAMPathFormat(cfg, def, &def->os.loader->nvram);
if (qemuDomainDefAddDefaultDevices(driver, def, qemuCaps) < 0)
diff --git a/tests/qemuxml2argvdata/bios-nvram-rw-template-vars.x86_64-latest.args b/tests/qemuxml2argvdata/bios-nvram-rw-template-vars.x86_64-latest.args
new file mode 100644
index 0000000000..8d971ec29b
--- /dev/null
+++ b/tests/qemuxml2argvdata/bios-nvram-rw-template-vars.x86_64-latest.args
@@ -0,0 +1,41 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-test-bios \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-test-bios/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-test-bios/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-test-bios/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=test-bios,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-test-bios/master-key.aes"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/test-bios.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash0-format","read-only":false,"driver":"raw","file":"libvirt-pflash0-storage"}' \
+-blockdev '{"driver":"file","filename":"/some/vars/path.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
+-machine pc,usb=off,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-accel tcg \
+-cpu qemu64 \
+-m 1024 \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 362d1fc1-df7d-193e-5c18-49a71bd1da66 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot menu=on,strict=on \
+-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
+-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}' \
+-device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ide0-0-0","bootindex":1}' \
+-device '{"driver":"usb-tablet","id":"input0","bus":"usb.0","port":"1"}' \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x2"}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/bios-nvram-rw-template-vars.xml b/tests/qemuxml2argvdata/bios-nvram-rw-template-vars.xml
new file mode 100644
index 0000000000..fe6a064c84
--- /dev/null
+++ b/tests/qemuxml2argvdata/bios-nvram-rw-template-vars.xml
@@ -0,0 +1,36 @@
+<domain type='qemu'>
+ <name>test-bios</name>
+ <uuid>362d1fc1-df7d-193e-5c18-49a71bd1da66</uuid>
+ <memory unit='KiB'>1048576</memory>
+ <currentMemory unit='KiB'>1048576</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <loader readonly='no' type='pflash'>/var/lib/libvirt/qemu/nvram/test-bios.fd</loader>
+ <nvram template="/some/vars/template/path.fd">/some/vars/path.fd</nvram>
+ <boot dev='hd'/>
+ <bootmenu enable='yes'/>
+ </os>
+ <features>
+ <acpi/>
+ </features>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>restart</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <disk type='block' device='disk'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='ide'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <controller type='usb' index='0'/>
+ <controller type='ide' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='tablet' bus='usb'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvdata/bios-nvram-rw-template.x86_64-latest.args b/tests/qemuxml2argvdata/bios-nvram-rw-template.x86_64-latest.args
new file mode 100644
index 0000000000..2900571473
--- /dev/null
+++ b/tests/qemuxml2argvdata/bios-nvram-rw-template.x86_64-latest.args
@@ -0,0 +1,41 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-test-bios \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-test-bios/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-test-bios/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-test-bios/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=test-bios,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-test-bios/master-key.aes"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/test-bios.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash0-format","read-only":false,"driver":"raw","file":"libvirt-pflash0-storage"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/test-bios_VARS.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
+-machine pc,usb=off,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-accel tcg \
+-cpu qemu64 \
+-m 1024 \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 362d1fc1-df7d-193e-5c18-49a71bd1da66 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot menu=on,strict=on \
+-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
+-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}' \
+-device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ide0-0-0","bootindex":1}' \
+-device '{"driver":"usb-tablet","id":"input0","bus":"usb.0","port":"1"}' \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x2"}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/bios-nvram-rw-template.xml b/tests/qemuxml2argvdata/bios-nvram-rw-template.xml
new file mode 100644
index 0000000000..334ed1425b
--- /dev/null
+++ b/tests/qemuxml2argvdata/bios-nvram-rw-template.xml
@@ -0,0 +1,36 @@
+<domain type='qemu'>
+ <name>test-bios</name>
+ <uuid>362d1fc1-df7d-193e-5c18-49a71bd1da66</uuid>
+ <memory unit='KiB'>1048576</memory>
+ <currentMemory unit='KiB'>1048576</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <loader readonly='no' type='pflash'>/var/lib/libvirt/qemu/nvram/test-bios.fd</loader>
+ <nvram template="/some/vars/template/path.fd"/>
+ <boot dev='hd'/>
+ <bootmenu enable='yes'/>
+ </os>
+ <features>
+ <acpi/>
+ </features>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>restart</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <disk type='block' device='disk'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='ide'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <controller type='usb' index='0'/>
+ <controller type='ide' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='tablet' bus='usb'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvdata/bios-nvram-rw-vars.x86_64-latest.args b/tests/qemuxml2argvdata/bios-nvram-rw-vars.x86_64-latest.args
new file mode 100644
index 0000000000..8d971ec29b
--- /dev/null
+++ b/tests/qemuxml2argvdata/bios-nvram-rw-vars.x86_64-latest.args
@@ -0,0 +1,41 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-test-bios \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-test-bios/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-test-bios/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-test-bios/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=test-bios,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-test-bios/master-key.aes"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/test-bios.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash0-format","read-only":false,"driver":"raw","file":"libvirt-pflash0-storage"}' \
+-blockdev '{"driver":"file","filename":"/some/vars/path.fd","node-name":"libvirt-pflash1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash1-format","read-only":false,"driver":"raw","file":"libvirt-pflash1-storage"}' \
+-machine pc,usb=off,dump-guest-core=off,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-format,memory-backend=pc.ram \
+-accel tcg \
+-cpu qemu64 \
+-m 1024 \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 362d1fc1-df7d-193e-5c18-49a71bd1da66 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot menu=on,strict=on \
+-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
+-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}' \
+-device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ide0-0-0","bootindex":1}' \
+-device '{"driver":"usb-tablet","id":"input0","bus":"usb.0","port":"1"}' \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-device '{"driver":"virtio-balloon-pci","id":"balloon0","bus":"pci.0","addr":"0x2"}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/bios-nvram-rw-vars.xml b/tests/qemuxml2argvdata/bios-nvram-rw-vars.xml
new file mode 100644
index 0000000000..12fdb251f3
--- /dev/null
+++ b/tests/qemuxml2argvdata/bios-nvram-rw-vars.xml
@@ -0,0 +1,36 @@
+<domain type='qemu'>
+ <name>test-bios</name>
+ <uuid>362d1fc1-df7d-193e-5c18-49a71bd1da66</uuid>
+ <memory unit='KiB'>1048576</memory>
+ <currentMemory unit='KiB'>1048576</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='x86_64' machine='pc'>hvm</type>
+ <loader readonly='no' type='pflash'>/var/lib/libvirt/qemu/nvram/test-bios.fd</loader>
+ <nvram>/some/vars/path.fd</nvram>
+ <boot dev='hd'/>
+ <bootmenu enable='yes'/>
+ </os>
+ <features>
+ <acpi/>
+ </features>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>restart</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu-system-x86_64</emulator>
+ <disk type='block' device='disk'>
+ <source dev='/dev/HostVG/QEMUGuest1'/>
+ <target dev='hda' bus='ide'/>
+ <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+ </disk>
+ <controller type='usb' index='0'/>
+ <controller type='ide' index='0'/>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='tablet' bus='usb'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <memballoon model='virtio'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 9378125da1..d2a53d35a8 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -1191,6 +1191,9 @@ mymain(void)
DO_TEST_PARSE_ERROR_NOCAPS("bios-nvram-no-path");
DO_TEST_CAPS_LATEST("bios-nvram-rw");
DO_TEST_CAPS_LATEST("bios-nvram-rw-implicit");
+ DO_TEST_CAPS_LATEST("bios-nvram-rw-template");
+ DO_TEST_CAPS_LATEST("bios-nvram-rw-template-vars");
+ DO_TEST_CAPS_LATEST("bios-nvram-rw-vars");
DO_TEST("bios-nvram-secure",
QEMU_CAPS_DEVICE_DMI_TO_PCI_BRIDGE,
QEMU_CAPS_DEVICE_PCI_BRIDGE,
--
2.34.1
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