[libvirt] [PATCH v3] qemu: Regenerate VNC socket paths
Martin Kletzander
mkletzan at redhat.com
Thu Apr 28 11:53:21 UTC 2016
Similarly to what commit 714080791778 did with some internal paths,
clear vnc socket paths that were generated by us. Having such path in
the definition can cause trouble when restoring the domain. The path is
generated to the per-domain directory that contains the domain ID.
However, that ID will be different upon restoration, so qemu won't be
able to create that socket because the directory will not be prepared.
To be able to migrate to older libvirt, skip formatting the socket path
in migratable XML if it was autogenerated. And mark it as autogenerated
if it already exists and we're parsing live XML.
Best viewed with '-C'.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1326270
Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
v3:
- Let the new boolean survive daemon restarts (or rather make it even
more inteligent than just remembering it
v2:
- Be able to migrate to older libvirt as well
- https://www.redhat.com/archives/libvir-list/2016-April/msg01803.html
v1:
- https://www.redhat.com/archives/libvir-list/2016-April/msg01735.html
src/conf/domain_conf.c | 6 +++-
src/conf/domain_conf.h | 1 +
src/qemu/qemu_command.c | 11 +++---
src/qemu/qemu_domain.c | 26 ++++++++++++++-
.../qemuxml2argv-graphics-vnc-autosocket.args | 22 ++++++++++++
.../qemuxml2argv-graphics-vnc-autosocket.xml | 34 +++++++++++++++++++
.../qemuxml2xmlout-graphics-vnc-autosocket.xml | 39 ++++++++++++++++++++++
tests/qemuxml2xmltest.c | 7 ++++
8 files changed, 140 insertions(+), 6 deletions(-)
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.args
create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.xml
create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-autosocket.xml
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index b46cd2a64f75..d8bed670f243 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -21342,7 +21342,11 @@ virDomainGraphicsDefFormat(virBufferPtr buf,
switch (def->type) {
case VIR_DOMAIN_GRAPHICS_TYPE_VNC:
if (def->data.vnc.socket) {
- virBufferEscapeString(buf, " socket='%s'", def->data.vnc.socket);
+ if (!def->data.vnc.socketAutogenerated ||
+ !(flags & VIR_DOMAIN_DEF_FORMAT_MIGRATABLE)) {
+ virBufferEscapeString(buf, " socket='%s'",
+ def->data.vnc.socket);
+ }
} else {
if (def->data.vnc.port &&
(!def->data.vnc.autoport || !(flags & VIR_DOMAIN_DEF_FORMAT_INACTIVE)))
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index ee66e6d6aa45..31e7a86d4746 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1564,6 +1564,7 @@ struct _virDomainGraphicsDef {
bool autoport;
char *keymap;
char *socket;
+ bool socketAutogenerated;
virDomainGraphicsAuthDef auth;
int sharePolicy;
} vnc;
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 9597b307e9de..6fbfe215bf29 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -7277,10 +7277,13 @@ qemuBuildGraphicsVNCCommandLine(virQEMUDriverConfigPtr cfg,
}
if (graphics->data.vnc.socket || cfg->vncAutoUnixSocket) {
- if (!graphics->data.vnc.socket &&
- virAsprintf(&graphics->data.vnc.socket,
- "%s/vnc.sock", domainLibDir) == -1)
- goto error;
+ if (!graphics->data.vnc.socket) {
+ if (virAsprintf(&graphics->data.vnc.socket,
+ "%s/vnc.sock", domainLibDir) < 0)
+ goto error;
+
+ graphics->data.vnc.socketAutogenerated = true;
+ }
virBufferAsprintf(&opt, "unix:%s", graphics->data.vnc.socket);
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index a2f981043915..6262bfee47d0 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1659,10 +1659,32 @@ qemuCanonicalizeMachine(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
}
+static void
+qemuDomainRecheckInternalPaths(virDomainDefPtr def,
+ virQEMUDriverConfigPtr cfg,
+ unsigned int flags)
+{
+ size_t i = 0;
+
+ for (i = 0; i < def->ngraphics; ++i) {
+ virDomainGraphicsDefPtr graphics = def->graphics[i];
+
+ if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC &&
+ graphics->data.vnc.socket &&
+ STRPREFIX(graphics->data.vnc.socket, cfg->libDir)) {
+ if (flags & VIR_DOMAIN_DEF_PARSE_INACTIVE)
+ VIR_FREE(graphics->data.vnc.socket);
+ else
+ graphics->data.vnc.socketAutogenerated = true;
+ }
+ }
+}
+
+
static int
qemuDomainDefPostParse(virDomainDefPtr def,
virCapsPtr caps,
- unsigned int parseFlags ATTRIBUTE_UNUSED,
+ unsigned int parseFlags,
void *opaque)
{
virQEMUDriverPtr driver = opaque;
@@ -1708,6 +1730,8 @@ qemuDomainDefPostParse(virDomainDefPtr def,
qemuDomainDefEnableDefaultFeatures(def);
+ qemuDomainRecheckInternalPaths(def, cfg, parseFlags);
+
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.args b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.args
new file mode 100644
index 000000000000..7e1fb6b3717f
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.args
@@ -0,0 +1,22 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu \
+-name QEMUGuest1 \
+-S \
+-M pc \
+-m 214 \
+-smp 1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-nodefaults \
+-monitor unix:/tmp/lib/domain--1-QEMUGuest1/monitor.sock,server,nowait \
+-no-acpi \
+-boot c \
+-usb \
+-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
+-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \
+-vnc unix:/tmp/lib/domain--1-QEMUGuest1/vnc.socket \
+-vga cirrus
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.xml b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.xml
new file mode 100644
index 000000000000..fa59c39873a5
--- /dev/null
+++ b/tests/qemuxml2argvdata/qemuxml2argv-graphics-vnc-autosocket.xml
@@ -0,0 +1,34 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <disk type='block' device='disk'>
+ <driver name='qemu' type='raw'/>
+ <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='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <graphics type='vnc' socket='/tmp/lib/domain-99-QEMUGuest1/delete.this.socket'/>
+ <video>
+ <model type='cirrus' vram='16384' heads='1'/>
+ </video>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-autosocket.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-autosocket.xml
new file mode 100644
index 000000000000..744053368745
--- /dev/null
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-graphics-vnc-autosocket.xml
@@ -0,0 +1,39 @@
+<domain type='qemu'>
+ <name>QEMUGuest1</name>
+ <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+ <memory unit='KiB'>219100</memory>
+ <currentMemory unit='KiB'>219100</currentMemory>
+ <vcpu placement='static'>1</vcpu>
+ <os>
+ <type arch='i686' machine='pc'>hvm</type>
+ <boot dev='hd'/>
+ </os>
+ <clock offset='utc'/>
+ <on_poweroff>destroy</on_poweroff>
+ <on_reboot>restart</on_reboot>
+ <on_crash>destroy</on_crash>
+ <devices>
+ <emulator>/usr/bin/qemu</emulator>
+ <disk type='block' device='disk'>
+ <driver name='qemu' type='raw'/>
+ <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'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+ </controller>
+ <controller type='ide' index='0'>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+ </controller>
+ <controller type='pci' index='0' model='pci-root'/>
+ <input type='mouse' bus='ps2'/>
+ <input type='keyboard' bus='ps2'/>
+ <graphics type='vnc' port='-1' autoport='yes'/>
+ <video>
+ <model type='cirrus' vram='16384' heads='1' primary='yes'/>
+ <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
+ </video>
+ <memballoon model='none'/>
+ </devices>
+</domain>
diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c
index f766f4dc521e..62f8f96c2274 100644
--- a/tests/qemuxml2xmltest.c
+++ b/tests/qemuxml2xmltest.c
@@ -263,6 +263,7 @@ mymain(void)
{
int ret = 0;
struct testInfo info;
+ virQEMUDriverConfigPtr cfg = NULL;
if (qemuTestDriverInit(&driver) < 0)
return EXIT_FAILURE;
@@ -774,6 +775,12 @@ mymain(void)
DO_TEST("virtio-input");
DO_TEST("virtio-input-passthrough");
+ cfg = virQEMUDriverGetConfig(&driver);
+ cfg->vncAutoUnixSocket = true;
+ DO_TEST_FULL("graphics-vnc-autosocket", WHEN_INACTIVE, NONE);
+ cfg->vncAutoUnixSocket = false;
+
+ virObjectUnref(cfg);
qemuTestDriverFree(&driver);
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
--
2.8.1
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