[libvirt] [PATCH 2/2] qemu: improve detection of UNIX path generated by libvirt

Currently we consider all UNIX paths with specific prefix as generated by libvirt, but that's a wrong assumption. Let's make the detection better by actually checking whether the whole path matches one of the paths that we generate or generated in the past. Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1446980 Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com&gt; --- src/qemu/qemu_domain.c | 78 +++++++++++++++++++--- .../qemuxml2argv-channel-unix-gen-path1.xml | 17 +++++ .../qemuxml2argv-channel-unix-gen-path2.xml | 17 +++++ .../qemuxml2argv-channel-unix-gen-path3.xml | 17 +++++ .../qemuxml2argv-channel-unix-user-path.xml | 17 +++++ .../qemuxml2xmlout-channel-unix-gen-path1.xml | 32 +++++++++ .../qemuxml2xmlout-channel-unix-gen-path2.xml | 32 +++++++++ .../qemuxml2xmlout-channel-unix-gen-path3.xml | 32 +++++++++ .../qemuxml2xmlout-channel-unix-user-path.xml | 33 +++++++++ tests/qemuxml2xmltest.c | 5 ++ 10 files changed, 271 insertions(+), 9 deletions(-) create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path1.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path2.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path3.xml create mode 100644 tests/qemuxml2argvdata/qemuxml2argv-channel-unix-user-path.xml create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path1.xml create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path2.xml create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path3.xml create mode 100644 tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-user-path.xml diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c index cc02c801e1..99bfd8f320 100644 --- a/src/qemu/qemu_domain.c +++ b/src/qemu/qemu_domain.c @@ -3154,24 +3154,84 @@ qemuDomainDefaultNetModel(const virDomainDef *def, /* - * Clear auto generated unix socket path, i.e., the one which starts with our - * channel directory. + * Clear auto generated unix socket paths: + * + * libvirt 1.2.18 and older: + * {cfg->channelTargetDir}/{dom-name}.{target-name} + * + * libvirt 1.2.19 - 1.3.2: + * {cfg->channelTargetDir}/domain-{dom-name}/{target-name} + * + * libvirt 1.3.3 and newer: + * {cfg->channelTargetDir}/domain-{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. + * + * This function clears the path for migration as well, so we need to clear + * the path event if we are not storing it in the XML. */ -static void +static int qemuDomainChrDefDropDefaultPath(virDomainChrDefPtr chr, virQEMUDriverPtr driver) { virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver); + char *path; + char *prefix = NULL; + int prefixLen; + int ret = -1; + int rv; - if (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL && - chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO && - chr->source->type == VIR_DOMAIN_CHR_TYPE_UNIX && - chr->source->data.nix.path && - STRPREFIX(chr->source->data.nix.path, cfg->channelTargetDir)) { - VIR_FREE(chr->source->data.nix.path); + if (chr->deviceType != VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL || + chr->targetType != VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO || + chr->source->type != VIR_DOMAIN_CHR_TYPE_UNIX || + !chr->source->data.nix.path) { + ret = 0; + goto cleanup; } + if (!STRPREFIX(chr->source->data.nix.path, cfg->channelTargetDir)) { + ret = 0; + goto cleanup; + } + + path = chr->source->data.nix.path + strlen(cfg->channelTargetDir); + prefixLen = strlen(path) - strlen(chr->target.name); + + if (STRNEQ(path + prefixLen, chr->target.name)) { + ret = 0; + goto cleanup; + } + + if (!VIR_STRNDUP(prefix, path, prefixLen)) + goto cleanup; + + /* Now we've isolated the middle part of the path by removing the + * cfg->channelTargetDir part from the beginning and chr->target.name + * from the end. The middle part is the one that changed in the past + * and the only part that we need to try to match with. */ + +#define VIR_CLEAR_CHR_DEF_PATH(regex) \ + if ((rv = virStringMatch(prefix, regex)) < 0) \ + goto cleanup; \ + \ + if (rv == 0) { \ + VIR_FREE(chr->source->data.nix.path); \ + ret = 0; \ + goto cleanup; \ + } + + VIR_CLEAR_CHR_DEF_PATH("^/[^/]+\\.$") + VIR_CLEAR_CHR_DEF_PATH("^/domain-[^/]+/$") + VIR_CLEAR_CHR_DEF_PATH("^/domain-[0-9]+-[^/]+/$") + +#undef VIR_CLEAR_CHR_DEF_PATH + + ret = 0; + cleanup: + VIR_FREE(prefix); virObjectUnref(cfg); + return ret; } diff --git a/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path1.xml b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path1.xml new file mode 100644 index 0000000000..25c84e922b --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path1.xml @@ -0,0 +1,17 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + </os> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <channel type='unix'> + <source mode='bind' path='/tmp/channel/QEMUGuest1.org.qemu.guest_agent.0'/> + <target type='virtio' name='org.qemu.guest_agent.0'/> + </channel> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path2.xml b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path2.xml new file mode 100644 index 0000000000..2d7ca0ae77 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path2.xml @@ -0,0 +1,17 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + </os> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <channel type='unix'> + <source mode='bind' path='/tmp/channel/domain-QEMUGuest1/org.qemu.guest_agent.0'/> + <target type='virtio' name='org.qemu.guest_agent.0'/> + </channel> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path3.xml b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path3.xml new file mode 100644 index 0000000000..20477016c9 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-gen-path3.xml @@ -0,0 +1,17 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + </os> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <channel type='unix'> + <source mode='bind' path='/tmp/channel/domain-1-QEMUGuest1/org.qemu.guest_agent.0'/> + <target type='virtio' name='org.qemu.guest_agent.0'/> + </channel> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-user-path.xml b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-user-path.xml new file mode 100644 index 0000000000..45fdf08a66 --- /dev/null +++ b/tests/qemuxml2argvdata/qemuxml2argv-channel-unix-user-path.xml @@ -0,0 +1,17 @@ +<domain type='qemu'> + <name>QEMUGuest1</name> + <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid> + <memory unit='KiB'>219100</memory> + <vcpu placement='static'>1</vcpu> + <os> + <type arch='x86_64' machine='pc'>hvm</type> + </os> + <devices> + <emulator>/usr/bin/qemu-system-x86_64</emulator> + <channel type='unix'> + <source mode='bind' path='/tmp/channel/QEMUGuest1/org.qemu.guest_agent.0'/> + <target type='virtio' name='org.qemu.guest_agent.0'/> + </channel> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path1.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path1.xml new file mode 100644 index 0000000000..aa2a3099d7 --- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path1.xml @@ -0,0 +1,32 @@ +<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='x86_64' 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-system-x86_64</emulator> + <controller type='usb' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> + </controller> + <controller type='pci' index='0' model='pci-root'/> + <controller type='virtio-serial' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </controller> + <channel type='unix'> + <target type='virtio' name='org.qemu.guest_agent.0'/> + <address type='virtio-serial' controller='0' bus='0' port='1'/> + </channel> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path2.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path2.xml new file mode 100644 index 0000000000..aa2a3099d7 --- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path2.xml @@ -0,0 +1,32 @@ +<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='x86_64' 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-system-x86_64</emulator> + <controller type='usb' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> + </controller> + <controller type='pci' index='0' model='pci-root'/> + <controller type='virtio-serial' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </controller> + <channel type='unix'> + <target type='virtio' name='org.qemu.guest_agent.0'/> + <address type='virtio-serial' controller='0' bus='0' port='1'/> + </channel> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path3.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path3.xml new file mode 100644 index 0000000000..aa2a3099d7 --- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-gen-path3.xml @@ -0,0 +1,32 @@ +<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='x86_64' 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-system-x86_64</emulator> + <controller type='usb' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> + </controller> + <controller type='pci' index='0' model='pci-root'/> + <controller type='virtio-serial' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </controller> + <channel type='unix'> + <target type='virtio' name='org.qemu.guest_agent.0'/> + <address type='virtio-serial' controller='0' bus='0' port='1'/> + </channel> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-user-path.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-user-path.xml new file mode 100644 index 0000000000..488212d761 --- /dev/null +++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-channel-unix-user-path.xml @@ -0,0 +1,33 @@ +<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='x86_64' 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-system-x86_64</emulator> + <controller type='usb' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> + </controller> + <controller type='pci' index='0' model='pci-root'/> + <controller type='virtio-serial' index='0'> + <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> + </controller> + <channel type='unix'> + <source mode='bind' path='/tmp/channel/QEMUGuest1/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> + <input type='mouse' bus='ps2'/> + <input type='keyboard' bus='ps2'/> + <memballoon model='none'/> + </devices> +</domain> diff --git a/tests/qemuxml2xmltest.c b/tests/qemuxml2xmltest.c index 2dccde746e..044faf2a5d 100644 --- a/tests/qemuxml2xmltest.c +++ b/tests/qemuxml2xmltest.c @@ -551,6 +551,11 @@ mymain(void) DO_TEST("channel-virtio", NONE); DO_TEST("channel-virtio-state", NONE); + DO_TEST_FULL("channel-unix-gen-path1", WHEN_INACTIVE, GIC_NONE, NONE); + DO_TEST_FULL("channel-unix-gen-path2", WHEN_INACTIVE, GIC_NONE, NONE); + DO_TEST_FULL("channel-unix-gen-path3", WHEN_INACTIVE, GIC_NONE, NONE); + DO_TEST_FULL("channel-unix-user-path", WHEN_INACTIVE, GIC_NONE, NONE); + DO_TEST("hostdev-usb-address", NONE); DO_TEST("hostdev-pci-address", NONE); DO_TEST("hostdev-vfio", NONE); -- 2.12.2