[PATCH RESEND 0/2] qemu: generate shorter channel target paths
This is a resend of: https://listman.redhat.com/archives/libvir-list/2023-July/240904.html Diff to previous version: - s/9.6.0/9.7.0/ because of missed release Michal Prívozník (2): qemu: Generate shorter channel target paths qemu: Move channelTargetDir into stateDir libvirt.spec.in | 2 - src/qemu/qemu_conf.c | 9 +-- src/qemu/qemu_domain.c | 65 ++++++++++++++++--- .../qemuhotplug-qemu-agent-detach.xml | 2 +- .../qemuhotplug-base+qemu-agent-detach.xml | 2 +- .../qemuhotplug-base+qemu-agent.xml | 2 +- ...emuhotplug-base-live+qemu-agent-detach.xml | 2 +- .../qemuhotplug-base-live+qemu-agent.xml | 2 +- .../channel-unix-source-path.xml | 8 +++ .../channel-unix-source-path-active.xml | 10 +++ .../channel-unix-source-path-inactive.xml | 8 +++ tests/testutilsqemu.c | 2 +- 12 files changed, 90 insertions(+), 24 deletions(-) -- 2.41.0
A <channel/> device is basically an UNIX socket into guest. Whatever is sent from the host, appears in the guest and vice versa. But because of that, the length of the path to the socket is important (underscored by fact that we derive the path from domain short name). But there are still cases where we might not fit into UNIX_PATH_MAX limit (usually 108 characters), because the path is derived also from other variables, e.g. XDG_CONFIG_HOME for session domains. There are two components though, that are needless: "/target/" and "domain-" prefix. Drop them. This is safe to do, because running domains have their path saved in status XML and even though paths are dropped on migration, they are not part of guest ABI and thus we are free to change them. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> --- libvirt.spec.in | 1 - src/qemu/qemu_conf.c | 6 +++--- src/qemu/qemu_domain.c | 15 +++++++++------ .../qemuhotplug-qemu-agent-detach.xml | 2 +- .../qemuhotplug-base+qemu-agent-detach.xml | 2 +- .../qemuhotplug-base+qemu-agent.xml | 2 +- .../qemuhotplug-base-live+qemu-agent-detach.xml | 2 +- .../qemuhotplug-base-live+qemu-agent.xml | 2 +- .../qemuxml2argvdata/channel-unix-source-path.xml | 4 ++++ .../channel-unix-source-path-active.xml | 5 +++++ .../channel-unix-source-path-inactive.xml | 4 ++++ tests/testutilsqemu.c | 2 +- 12 files changed, 31 insertions(+), 16 deletions(-) diff --git a/libvirt.spec.in b/libvirt.spec.in index 17d5f5ff4a..3b179d1fd9 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -2136,7 +2136,6 @@ exit 0 %ghost %dir %{_rundir}/libvirt/qemu/swtpm/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/channel/ -%dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/channel/target/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/checkpoint/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/dump/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/nvram/ diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index bd984448a3..532fe36be3 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -151,7 +151,7 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->snapshotDir = g_strdup_printf("%s/snapshot", cfg->libDir); cfg->checkpointDir = g_strdup_printf("%s/checkpoint", cfg->libDir); cfg->autoDumpPath = g_strdup_printf("%s/dump", cfg->libDir); - cfg->channelTargetDir = g_strdup_printf("%s/channel/target", cfg->libDir); + cfg->channelTargetDir = g_strdup_printf("%s/channel", cfg->libDir); cfg->nvramDir = g_strdup_printf("%s/nvram", cfg->libDir); cfg->memoryBackingDir = g_strdup_printf("%s/ram", cfg->libDir); } else if (privileged) { @@ -173,7 +173,7 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->snapshotDir = g_strdup_printf("%s/snapshot", cfg->libDir); cfg->checkpointDir = g_strdup_printf("%s/checkpoint", cfg->libDir); cfg->autoDumpPath = g_strdup_printf("%s/dump", cfg->libDir); - cfg->channelTargetDir = g_strdup_printf("%s/channel/target", cfg->libDir); + cfg->channelTargetDir = g_strdup_printf("%s/channel", cfg->libDir); cfg->nvramDir = g_strdup_printf("%s/nvram", cfg->libDir); cfg->memoryBackingDir = g_strdup_printf("%s/ram", cfg->libDir); cfg->swtpmStorageDir = g_strdup_printf("%s/lib/libvirt/swtpm", @@ -201,7 +201,7 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->checkpointDir = g_strdup_printf("%s/qemu/checkpoint", cfg->configBaseDir); cfg->autoDumpPath = g_strdup_printf("%s/qemu/dump", cfg->configBaseDir); - cfg->channelTargetDir = g_strdup_printf("%s/qemu/channel/target", + cfg->channelTargetDir = g_strdup_printf("%s/qemu/channel", cfg->configBaseDir); cfg->nvramDir = g_strdup_printf("%s/qemu/nvram", cfg->configBaseDir); cfg->memoryBackingDir = g_strdup_printf("%s/qemu/ram", cfg->configBaseDir); diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 029238a9d7..224350dabc 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -1780,7 +1780,7 @@ qemuDomainSetPrivatePaths(virQEMUDriver *driver, priv->libDir = g_strdup_printf("%s/domain-%s", cfg->libDir, domname); if (!priv->channelTargetDir) - priv->channelTargetDir = g_strdup_printf("%s/domain-%s", + priv->channelTargetDir = g_strdup_printf("%s/%s", cfg->channelTargetDir, domname); return 0; @@ -5405,13 +5405,16 @@ qemuDomainDefaultNetModel(const virDomainDef *def, * Clear auto generated unix socket paths: * * libvirt 1.2.18 and older: - * {cfg->channelTargetDir}/{dom-name}.{target-name} + * {cfg->channelTargetDir}/target/{dom-name}.{target-name} * * libvirt 1.2.19 - 1.3.2: - * {cfg->channelTargetDir}/domain-{dom-name}/{target-name} + * {cfg->channelTargetDir}/target/domain-{dom-name}/{target-name} * - * libvirt 1.3.3 and newer: - * {cfg->channelTargetDir}/domain-{dom-id}-{short-dom-name}/{target-name} + * libvirt 1.3.3 - 9.7.0: + * {cfg->channelTargetDir}/target/domain-{dom-id}-{short-dom-name}/{target-name} + * + * libvirt 9.7.0 and newer: + * {cfg->channelTargetDir}/{dom-id}-{short-dom-name}/{target-name} * * The unix socket path was stored in config XML until libvirt 1.3.0. * If someone specifies the same path as we generate, they shouldn't do it. @@ -5437,7 +5440,7 @@ qemuDomainChrDefDropDefaultPath(virDomainChrDef *chr, cfg = virQEMUDriverGetConfig(driver); virBufferEscapeRegex(&buf, "^%s", cfg->channelTargetDir); - virBufferAddLit(&buf, "/([^/]+\\.)|(domain-[^/]+/)"); + virBufferAddLit(&buf, "/(target/)?([^/]+\\.)|(domain-[^/]+/)|([0-9]+-[^/]+/)"); virBufferEscapeRegex(&buf, "%s$", chr->target.name); regexp = virBufferContentAndReset(&buf); diff --git a/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml b/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml index 0c3c70a78e..7871de59c4 100644 --- a/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml +++ b/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml @@ -1,5 +1,5 @@ <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/lib/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent-detach.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent-detach.xml index 728af3391e..bf2afb67d9 100644 --- a/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent-detach.xml +++ b/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent-detach.xml @@ -39,7 +39,7 @@ <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/lib/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent.xml index 728af3391e..31917cee92 100644 --- a/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent.xml +++ b/tests/qemuhotplugtestdomains/qemuhotplug-base+qemu-agent.xml @@ -39,7 +39,7 @@ <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/lib/libvirt/qemu/channel/domain-7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml index 728af3391e..bf2afb67d9 100644 --- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml +++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml @@ -39,7 +39,7 @@ <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/lib/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml index 0e4c3907bf..00191a9cb8 100644 --- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml +++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml @@ -42,7 +42,7 @@ <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/domain-7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/lib/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> diff --git a/tests/qemuxml2argvdata/channel-unix-source-path.xml b/tests/qemuxml2argvdata/channel-unix-source-path.xml index f24c636147..db0e99c3d1 100644 --- a/tests/qemuxml2argvdata/channel-unix-source-path.xml +++ b/tests/qemuxml2argvdata/channel-unix-source-path.xml @@ -24,6 +24,10 @@ <source mode='bind' path='/var/lib/libvirt/qemu/channel/target/QEMUGuest1/org.qemu.guest_agent.3'/> <target type='virtio' name='org.qemu.guest_agent.3'/> </channel> + <channel type='unix'> + <source mode='bind' path='/var/lib/libvirt/qemu/channel/1-QEMUGuest1/org.qemu.guest_agent.4'/> + <target type='virtio' name='org.qemu.guest_agent.4'/> + </channel> <memballoon model='none'/> </devices> </domain> diff --git a/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml b/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml index 0d6a0295f8..68835ceb15 100644 --- a/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml +++ b/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml @@ -41,6 +41,11 @@ <target type='virtio' name='org.qemu.guest_agent.3'/> <address type='virtio-serial' controller='0' bus='0' port='4'/> </channel> + <channel type='unix'> + <source mode='bind' path='/var/lib/libvirt/qemu/channel/1-QEMUGuest1/org.qemu.guest_agent.4'/> + <target type='virtio' name='org.qemu.guest_agent.4'/> + <address type='virtio-serial' controller='0' bus='0' port='5'/> + </channel> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <audio id='1' type='none'/> diff --git a/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml b/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml index d02ea52408..738c1184c0 100644 --- a/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml +++ b/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml @@ -38,6 +38,10 @@ <target type='virtio' name='org.qemu.guest_agent.3'/> <address type='virtio-serial' controller='0' bus='0' port='4'/> </channel> + <channel type='unix'> + <target type='virtio' name='org.qemu.guest_agent.4'/> + <address type='virtio-serial' controller='0' bus='0' port='5'/> + </channel> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <audio id='1' type='none'/> diff --git a/tests/testutilsqemu.c b/tests/testutilsqemu.c index 16b773a768..2d3e04de73 100644 --- a/tests/testutilsqemu.c +++ b/tests/testutilsqemu.c @@ -460,7 +460,7 @@ int qemuTestDriverInit(virQEMUDriver *driver) VIR_FREE(cfg->libDir); cfg->libDir = g_strdup("/var/lib/libvirt/qemu"); VIR_FREE(cfg->channelTargetDir); - cfg->channelTargetDir = g_strdup("/var/lib/libvirt/qemu/channel/target"); + cfg->channelTargetDir = g_strdup("/var/lib/libvirt/qemu/channel"); VIR_FREE(cfg->memoryBackingDir); cfg->memoryBackingDir = g_strdup("/var/lib/libvirt/qemu/ram"); VIR_FREE(cfg->nvramDir); -- 2.41.0
For historical reasons (i.e. unknown reason) we put channel sockets into a path derived from cfg->libDir which is a path that survives host reboots (e.g. /var/lib/libvirt/...). This is not necessary and in fact for session daemon creates a longer prefix: XDG_CONFIG_HOME -> /home/user/.config XDG_RUNTIME_DIR -> /run/user/1000 Worse, if host is rebooted suddenly (e.g. due to power loss) then we leave files behind and nobody will ever remove them. Therefore, place the channel target dir into state dir. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=2173980 Signed-off-by: Michal Privoznik <mprivozn@redhat.com> --- libvirt.spec.in | 1 - src/qemu/qemu_conf.c | 9 ++-- src/qemu/qemu_domain.c | 52 +++++++++++++++++-- .../qemuhotplug-qemu-agent-detach.xml | 2 +- ...emuhotplug-base-live+qemu-agent-detach.xml | 2 +- .../qemuhotplug-base-live+qemu-agent.xml | 2 +- .../channel-unix-source-path.xml | 4 ++ .../channel-unix-source-path-active.xml | 5 ++ .../channel-unix-source-path-inactive.xml | 4 ++ tests/testutilsqemu.c | 2 +- 10 files changed, 67 insertions(+), 16 deletions(-) diff --git a/libvirt.spec.in b/libvirt.spec.in index 3b179d1fd9..7157cfe3b4 100644 --- a/libvirt.spec.in +++ b/libvirt.spec.in @@ -2135,7 +2135,6 @@ exit 0 %ghost %dir %{_rundir}/libvirt/qemu/slirp/ %ghost %dir %{_rundir}/libvirt/qemu/swtpm/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/ -%dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/channel/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/checkpoint/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/dump/ %dir %attr(0751, %{qemu_user}, %{qemu_group}) %{_localstatedir}/lib/libvirt/qemu/nvram/ diff --git a/src/qemu/qemu_conf.c b/src/qemu/qemu_conf.c index 532fe36be3..3f811d064f 100644 --- a/src/qemu/qemu_conf.c +++ b/src/qemu/qemu_conf.c @@ -143,6 +143,7 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->configBaseDir = g_strdup_printf("%s/etc", root); cfg->stateDir = g_strdup_printf("%s/run/qemu", root); cfg->swtpmStateDir = g_strdup_printf("%s/run/swtpm", root); + cfg->channelTargetDir = g_strdup_printf("%s/channel", cfg->stateDir); cfg->cacheDir = g_strdup_printf("%s/cache/qemu", root); cfg->libDir = g_strdup_printf("%s/lib/qemu", root); cfg->swtpmStorageDir = g_strdup_printf("%s/lib/swtpm", root); @@ -151,7 +152,6 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->snapshotDir = g_strdup_printf("%s/snapshot", cfg->libDir); cfg->checkpointDir = g_strdup_printf("%s/checkpoint", cfg->libDir); cfg->autoDumpPath = g_strdup_printf("%s/dump", cfg->libDir); - cfg->channelTargetDir = g_strdup_printf("%s/channel", cfg->libDir); cfg->nvramDir = g_strdup_printf("%s/nvram", cfg->libDir); cfg->memoryBackingDir = g_strdup_printf("%s/ram", cfg->libDir); } else if (privileged) { @@ -163,8 +163,8 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->configBaseDir = g_strdup(SYSCONFDIR "/libvirt"); cfg->stateDir = g_strdup_printf("%s/libvirt/qemu", RUNSTATEDIR); - cfg->swtpmStateDir = g_strdup_printf("%s/libvirt/qemu/swtpm", RUNSTATEDIR); + cfg->channelTargetDir = g_strdup_printf("%s/channel", cfg->stateDir); cfg->cacheDir = g_strdup_printf("%s/cache/libvirt/qemu", LOCALSTATEDIR); @@ -173,7 +173,6 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->snapshotDir = g_strdup_printf("%s/snapshot", cfg->libDir); cfg->checkpointDir = g_strdup_printf("%s/checkpoint", cfg->libDir); cfg->autoDumpPath = g_strdup_printf("%s/dump", cfg->libDir); - cfg->channelTargetDir = g_strdup_printf("%s/channel", cfg->libDir); cfg->nvramDir = g_strdup_printf("%s/nvram", cfg->libDir); cfg->memoryBackingDir = g_strdup_printf("%s/ram", cfg->libDir); cfg->swtpmStorageDir = g_strdup_printf("%s/lib/libvirt/swtpm", @@ -190,8 +189,8 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, rundir = virGetUserRuntimeDirectory(); cfg->stateDir = g_strdup_printf("%s/qemu/run", rundir); - cfg->swtpmStateDir = g_strdup_printf("%s/swtpm", cfg->stateDir); + cfg->channelTargetDir = g_strdup_printf("%s/channel", cfg->stateDir); cfg->configBaseDir = virGetUserConfigDirectory(); @@ -201,8 +200,6 @@ virQEMUDriverConfig *virQEMUDriverConfigNew(bool privileged, cfg->checkpointDir = g_strdup_printf("%s/qemu/checkpoint", cfg->configBaseDir); cfg->autoDumpPath = g_strdup_printf("%s/qemu/dump", cfg->configBaseDir); - cfg->channelTargetDir = g_strdup_printf("%s/qemu/channel", - cfg->configBaseDir); cfg->nvramDir = g_strdup_printf("%s/qemu/nvram", cfg->configBaseDir); cfg->memoryBackingDir = g_strdup_printf("%s/qemu/ram", cfg->configBaseDir); cfg->swtpmStorageDir = g_strdup_printf("%s/qemu/swtpm", diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index 224350dabc..d46516856e 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -5401,6 +5401,28 @@ qemuDomainDefaultNetModel(const virDomainDef *def, } + +static bool +qemuDomainChrMatchDefaultPath(const char *prefix, + const char *infix, + const char *target, + const char *path) +{ + g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER; + g_autofree char *regexp = NULL; + + virBufferEscapeRegex(&buf, "^%s", prefix); + if (infix) + virBufferEscapeRegex(&buf, "%s", infix); + virBufferAddLit(&buf, "/(target/)?([^/]+\\.)|(domain-[^/]+/)|([0-9]+-[^/]+/)"); + virBufferEscapeRegex(&buf, "%s$", target); + + regexp = virBufferContentAndReset(&buf); + + return virStringMatch(path, regexp); +} + + /* * Clear auto generated unix socket paths: * @@ -5421,6 +5443,9 @@ qemuDomainDefaultNetModel(const virDomainDef *def, * * This function clears the path for migration as well, so we need to clear * the path even if we are not storing it in the XML. + * + * Please note, as of libvirt 9.7.0 the channelTargetDir is no longer derived + * from cfg->libDir but rather cfg->stateDir. */ static void qemuDomainChrDefDropDefaultPath(virDomainChrDef *chr, @@ -5439,14 +5464,31 @@ qemuDomainChrDefDropDefaultPath(virDomainChrDef *chr, cfg = virQEMUDriverGetConfig(driver); - virBufferEscapeRegex(&buf, "^%s", cfg->channelTargetDir); - virBufferAddLit(&buf, "/(target/)?([^/]+\\.)|(domain-[^/]+/)|([0-9]+-[^/]+/)"); - virBufferEscapeRegex(&buf, "%s$", chr->target.name); + if (qemuDomainChrMatchDefaultPath(cfg->channelTargetDir, + NULL, + chr->target.name, + chr->source->data.nix.path)) { + VIR_FREE(chr->source->data.nix.path); + return; + } - regexp = virBufferContentAndReset(&buf); + /* Previously, channelTargetDir was derived from cfg->libdir, or + * cfg->configBaseDir even. Try them too. */ + if (qemuDomainChrMatchDefaultPath(cfg->libDir, + "/channel", + chr->target.name, + chr->source->data.nix.path)) { + VIR_FREE(chr->source->data.nix.path); + return; + } - if (virStringMatch(chr->source->data.nix.path, regexp)) + if (qemuDomainChrMatchDefaultPath(cfg->configBaseDir, + "/qemu/channel", + chr->target.name, + chr->source->data.nix.path)) { VIR_FREE(chr->source->data.nix.path); + return; + } } diff --git a/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml b/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml index 7871de59c4..dd4feae855 100644 --- a/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml +++ b/tests/qemuhotplugtestdevices/qemuhotplug-qemu-agent-detach.xml @@ -1,5 +1,5 @@ <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/run/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml index bf2afb67d9..cfa7509485 100644 --- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml +++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent-detach.xml @@ -39,7 +39,7 @@ <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/run/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml index 00191a9cb8..eb543dbaf4 100644 --- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml +++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+qemu-agent.xml @@ -42,7 +42,7 @@ <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </controller> <channel type='unix'> - <source mode='bind' path='/var/lib/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> + <source mode='bind' path='/var/run/libvirt/qemu/channel/7-hotplug/org.qemu.guest_agent.0'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <alias name='channel0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> diff --git a/tests/qemuxml2argvdata/channel-unix-source-path.xml b/tests/qemuxml2argvdata/channel-unix-source-path.xml index db0e99c3d1..df548d88e7 100644 --- a/tests/qemuxml2argvdata/channel-unix-source-path.xml +++ b/tests/qemuxml2argvdata/channel-unix-source-path.xml @@ -28,6 +28,10 @@ <source mode='bind' path='/var/lib/libvirt/qemu/channel/1-QEMUGuest1/org.qemu.guest_agent.4'/> <target type='virtio' name='org.qemu.guest_agent.4'/> </channel> + <channel type='unix'> + <source mode='bind' path='/var/run/libvirt/qemu/channel/1-QEMUGuest1/org.qemu.guest_agent.5'/> + <target type='virtio' name='org.qemu.guest_agent.5'/> + </channel> <memballoon model='none'/> </devices> </domain> diff --git a/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml b/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml index 68835ceb15..ec927d37c6 100644 --- a/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml +++ b/tests/qemuxml2xmloutdata/channel-unix-source-path-active.xml @@ -46,6 +46,11 @@ <target type='virtio' name='org.qemu.guest_agent.4'/> <address type='virtio-serial' controller='0' bus='0' port='5'/> </channel> + <channel type='unix'> + <source mode='bind' path='/var/run/libvirt/qemu/channel/1-QEMUGuest1/org.qemu.guest_agent.5'/> + <target type='virtio' name='org.qemu.guest_agent.5'/> + <address type='virtio-serial' controller='0' bus='0' port='6'/> + </channel> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <audio id='1' type='none'/> diff --git a/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml b/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml index 738c1184c0..c979bedb39 100644 --- a/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml +++ b/tests/qemuxml2xmloutdata/channel-unix-source-path-inactive.xml @@ -42,6 +42,10 @@ <target type='virtio' name='org.qemu.guest_agent.4'/> <address type='virtio-serial' controller='0' bus='0' port='5'/> </channel> + <channel type='unix'> + <target type='virtio' name='org.qemu.guest_agent.5'/> + <address type='virtio-serial' controller='0' bus='0' port='6'/> + </channel> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <audio id='1' type='none'/> diff --git a/tests/testutilsqemu.c b/tests/testutilsqemu.c index 2d3e04de73..db911d7c90 100644 --- a/tests/testutilsqemu.c +++ b/tests/testutilsqemu.c @@ -460,7 +460,7 @@ int qemuTestDriverInit(virQEMUDriver *driver) VIR_FREE(cfg->libDir); cfg->libDir = g_strdup("/var/lib/libvirt/qemu"); VIR_FREE(cfg->channelTargetDir); - cfg->channelTargetDir = g_strdup("/var/lib/libvirt/qemu/channel"); + cfg->channelTargetDir = g_strdup("/var/run/libvirt/qemu/channel"); VIR_FREE(cfg->memoryBackingDir); cfg->memoryBackingDir = g_strdup("/var/lib/libvirt/qemu/ram"); VIR_FREE(cfg->nvramDir); -- 2.41.0
On Wed, Aug 16, 2023 at 09:15:20AM +0200, Michal Privoznik wrote:
This is a resend of:
https://listman.redhat.com/archives/libvir-list/2023-July/240904.html
Diff to previous version: - s/9.6.0/9.7.0/ because of missed release
Michal Prívozník (2): qemu: Generate shorter channel target paths qemu: Move channelTargetDir into stateDir
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
participants (2)
-
Michal Privoznik -
Pavel Hrdina