[libvirt] [PATCH v2] guest-agent-socket: don't generate default path to config XML
While we started using for all unix sockets as default one common directory based on a guest name it introduced several issues, for example with renaming the guest or cloning it. In general it's not entirely bad, but in this case it would be best to hide the auto-generated socket path from user and don't export it in the config XML. Signed-off-by: Pavel Hrdina <phrdina@redhat.com> --- Version 2: - removed unnecessary changes src/qemu/qemu_command.c | 28 ++++++++++++++++++++++++++++ src/qemu/qemu_command.h | 1 + src/qemu/qemu_domain.c | 16 ---------------- src/qemu/qemu_driver.c | 3 +++ src/qemu/qemu_process.c | 3 +++ tests/qemuhotplugtest.c | 5 +++++ tests/qemuxml2argvtest.c | 5 +++++ 7 files changed, 45 insertions(+), 16 deletions(-) diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 2a9fab5..f1bb621 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -1262,6 +1262,34 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps) } +int +qemuUnixSocketGenerate(virDomainDefPtr def, + virQEMUDriverConfigPtr cfg) +{ + size_t i; + + for (i = 0; i < def->nchannels; i++) { + virDomainChrDefPtr channel = def->channels[i]; + + if (channel->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL && + channel->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO && + channel->source.type == VIR_DOMAIN_CHR_TYPE_UNIX && + !channel->source.data.nix.path) { + if (virAsprintf(&channel->source.data.nix.path, + "%s/domain-%s/%s", + cfg->channelTargetDir, def->name, + channel->target.name ? channel->target.name + : "unknown.sock") < 0) + return -1; + + channel->source.data.nix.listen = true; + } + } + + return 0; +} + + static void qemuDomainPrimeVirtioDeviceAddresses(virDomainDefPtr def, virDomainDeviceAddressType type) diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index bebdd27..0512a23 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -283,6 +283,7 @@ int qemuAssignDevicePCISlots(virDomainDefPtr def, virDomainPCIAddressSetPtr addrs); int qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps); +int qemuUnixSocketGenerate(virDomainDefPtr def, virQEMUDriverConfigPtr cfg); int qemuDomainNetVLAN(virDomainNetDefPtr def); int qemuAssignDeviceNetAlias(virDomainDefPtr def, virDomainNetDefPtr net, int idx); int qemuAssignDeviceDiskAlias(virDomainDefPtr vmdef, diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index ed21245..7e05289 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -1329,22 +1329,6 @@ qemuDomainDeviceDefPostParse(virDomainDeviceDefPtr dev, ARCH_IS_S390(def->os.arch)) dev->data.controller->model = VIR_DOMAIN_CONTROLLER_MODEL_SCSI_VIRTIO_SCSI; - /* auto generate unix socket path */ - if (dev->type == VIR_DOMAIN_DEVICE_CHR && - dev->data.chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL && - dev->data.chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO && - dev->data.chr->source.type == VIR_DOMAIN_CHR_TYPE_UNIX && - !dev->data.chr->source.data.nix.path) { - if (virAsprintf(&dev->data.chr->source.data.nix.path, - "%s/domain-%s/%s", - cfg->channelTargetDir, def->name, - dev->data.chr->target.name ? dev->data.chr->target.name - : "unknown.sock") < 0) - goto cleanup; - - dev->data.chr->source.data.nix.listen = true; - } - /* forbid capabilities mode hostdev in this kind of hypervisor */ if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV && dev->data.hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES) { diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index ae1d8e7..39f2f03 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -7254,6 +7254,9 @@ static char *qemuConnectDomainXMLToNative(virConnectPtr conn, if (qemuAssignDeviceAliases(def, qemuCaps) < 0) goto cleanup; + if (qemuUnixSocketGenerate(def, cfg) < 0) + goto cleanup; + if (qemuDomainAssignAddresses(def, qemuCaps, NULL) < 0) goto cleanup; diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 192730c..29cf965 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -4663,6 +4663,9 @@ qemuProcessLaunch(virConnectPtr conn, if (qemuAssignDeviceAliases(vm->def, priv->qemuCaps) < 0) goto cleanup; + if (qemuUnixSocketGenerate(vm->def, cfg) < 0) + goto cleanup; + /* Get the advisory nodeset from numad if 'placement' of * either <vcpu> or <numatune> is 'auto'. */ diff --git a/tests/qemuhotplugtest.c b/tests/qemuhotplugtest.c index 102e052..b17cca2 100644 --- a/tests/qemuhotplugtest.c +++ b/tests/qemuhotplugtest.c @@ -61,6 +61,7 @@ qemuHotplugCreateObjects(virDomainXMLOptionPtr xmlopt, { int ret = -1; qemuDomainObjPrivatePtr priv = NULL; + virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(&driver); if (!(*vm = virDomainObjNew(xmlopt))) goto cleanup; @@ -94,10 +95,14 @@ qemuHotplugCreateObjects(virDomainXMLOptionPtr xmlopt, if (qemuAssignDeviceAliases((*vm)->def, priv->qemuCaps) < 0) goto cleanup; + if (qemuUnixSocketGenerate((*vm)->def, cfg) < 0) + goto cleanup; + (*vm)->def->id = QEMU_HOTPLUG_TEST_DOMAIN_ID; ret = 0; cleanup: + virObjectUnref(cfg); return ret; } diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index f7596a0..f6083db 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -262,6 +262,7 @@ static int testCompareXMLToArgvFiles(const char *xml, virCommandPtr cmd = NULL; size_t i; virBitmapPtr nodeset = NULL; + virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(&driver); if (!(conn = virGetConnect())) goto out; @@ -324,6 +325,9 @@ static int testCompareXMLToArgvFiles(const char *xml, if (qemuAssignDeviceAliases(vmdef, extraFlags) < 0) goto out; + if (qemuUnixSocketGenerate(vmdef, cfg) < 0) + goto out; + for (i = 0; i < vmdef->nhostdevs; i++) { virDomainHostdevDefPtr hostdev = vmdef->hostdevs[i]; @@ -387,6 +391,7 @@ static int testCompareXMLToArgvFiles(const char *xml, virCommandFree(cmd); virDomainDefFree(vmdef); virObjectUnref(conn); + virObjectUnref(cfg); virBitmapFree(nodeset); return ret; } -- 2.6.3
On Mon, Nov 30, 2015 at 12:37:58PM +0100, Pavel Hrdina wrote:
While we started using for all unix sockets as default one common directory based on a guest name it introduced several issues, for example with renaming the guest or cloning it. In general it's not entirely bad, but in this case it would be best to hide the auto-generated socket path from user and don't export it in the config XML.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com> ---
Version 2: - removed unnecessary changes
src/qemu/qemu_command.c | 28 ++++++++++++++++++++++++++++ src/qemu/qemu_command.h | 1 + src/qemu/qemu_domain.c | 16 ---------------- src/qemu/qemu_driver.c | 3 +++ src/qemu/qemu_process.c | 3 +++ tests/qemuhotplugtest.c | 5 +++++ tests/qemuxml2argvtest.c | 5 +++++ 7 files changed, 45 insertions(+), 16 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c index 2a9fab5..f1bb621 100644 --- a/src/qemu/qemu_command.c +++ b/src/qemu/qemu_command.c @@ -1262,6 +1262,34 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps) }
+int +qemuUnixSocketGenerate(virDomainDefPtr def, + virQEMUDriverConfigPtr cfg) +{ + size_t i; + + for (i = 0; i < def->nchannels; i++) { + virDomainChrDefPtr channel = def->channels[i]; + + if (channel->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL && + channel->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO && + channel->source.type == VIR_DOMAIN_CHR_TYPE_UNIX && + !channel->source.data.nix.path) { + if (virAsprintf(&channel->source.data.nix.path, + "%s/domain-%s/%s", + cfg->channelTargetDir, def->name, + channel->target.name ? channel->target.name + : "unknown.sock") < 0) + return -1; + + channel->source.data.nix.listen = true; + } + } + + return 0; +} + + static void qemuDomainPrimeVirtioDeviceAddresses(virDomainDefPtr def, virDomainDeviceAddressType type) diff --git a/src/qemu/qemu_command.h b/src/qemu/qemu_command.h index bebdd27..0512a23 100644 --- a/src/qemu/qemu_command.h +++ b/src/qemu/qemu_command.h @@ -283,6 +283,7 @@ int qemuAssignDevicePCISlots(virDomainDefPtr def, virDomainPCIAddressSetPtr addrs);
int qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps); +int qemuUnixSocketGenerate(virDomainDefPtr def, virQEMUDriverConfigPtr cfg); int qemuDomainNetVLAN(virDomainNetDefPtr def); int qemuAssignDeviceNetAlias(virDomainDefPtr def, virDomainNetDefPtr net, int idx); int qemuAssignDeviceDiskAlias(virDomainDefPtr vmdef, diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index ed21245..7e05289 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -1329,22 +1329,6 @@ qemuDomainDeviceDefPostParse(virDomainDeviceDefPtr dev, ARCH_IS_S390(def->os.arch)) dev->data.controller->model = VIR_DOMAIN_CONTROLLER_MODEL_SCSI_VIRTIO_SCSI;
- /* auto generate unix socket path */ - if (dev->type == VIR_DOMAIN_DEVICE_CHR && - dev->data.chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL && - dev->data.chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO && - dev->data.chr->source.type == VIR_DOMAIN_CHR_TYPE_UNIX && - !dev->data.chr->source.data.nix.path) { - if (virAsprintf(&dev->data.chr->source.data.nix.path, - "%s/domain-%s/%s", - cfg->channelTargetDir, def->name, - dev->data.chr->target.name ? dev->data.chr->target.name - : "unknown.sock") < 0) - goto cleanup; - - dev->data.chr->source.data.nix.listen = true; - } -
For the sake of upgradibility, here we should disregard any paths that start with cfg->channelTargetDir, maybe even with cfg->configBaseDir. Users should not be using paths in libvirt's directories if they need to access it anyway. Of course we'll need to document that as well. I just wonder how come we don't need any tests fixed. We should've been testing the auto-generation, I believe. And even if not, we should test that we don't generate it into the XML now. Otherwise looks fine, weak ACK due to tests, but I believe they can be part of the next patch for the removal of these paths.
participants (2)
-
Martin Kletzander -
Pavel Hrdina