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From e093a96f00590a93221fac3db6397ec1d2982fdb Mon Sep 17 00:00:00 2001
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Message-Id: <e093a96f00590a93221fac3db6397ec1d2982fdb@dist-git>
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From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= <berrange@redhat.com>
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Date: Fri, 6 Jul 2018 15:47:02 +0100
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Subject: [PATCH] qemu: fix UNIX socket chardevs operating in client mode
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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https://bugzilla.redhat.com/show_bug.cgi?id=1598440
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When support was adding for passing a pre-opened listener socket to UNIX
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chardevs, it accidentally passed the listener socket for client mode
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chardevs too with predictable amounts of fail resulting. This affects
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libvirt when using QEMU >= 2.12
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Expand the unit test coverage to validate that we are only doing FD
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passing when operating in server mode.
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  https://bugzilla.redhat.com/show_bug.cgi?id=1598440
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Tested-by: Richard W.M. Jones <rjones@redhat.com>
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Reported-by: Richard W.M. Jones <rjones@redhat.com>
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Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
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(cherry picked from commit 1bc1a7e3205f7ef75ebd8fd1ef7653f8e181e3d2)
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Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
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---
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 src/qemu/qemu_command.c                       |  3 +-
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 .../qemuxml2argvdata/serial-unix-chardev.args |  2 ++
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 .../serial-unix-chardev.x86_64-latest.args    | 36 +++++++++++++++++++
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 .../qemuxml2argvdata/serial-unix-chardev.xml  |  4 +++
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 tests/qemuxml2argvtest.c                      |  1 +
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 5 files changed, 45 insertions(+), 1 deletion(-)
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 create mode 100644 tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args
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diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
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index 637e787d25..f38ae668a7 100644
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--- a/src/qemu/qemu_command.c
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+++ b/src/qemu/qemu_command.c
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@@ -5082,7 +5082,8 @@ qemuBuildChrChardevStr(virLogManagerPtr logManager,
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         break;
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     case VIR_DOMAIN_CHR_TYPE_UNIX:
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-        if ((flags & QEMU_BUILD_CHARDEV_UNIX_FD_PASS) &&
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+        if (dev->data.nix.listen &&
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+            (flags & QEMU_BUILD_CHARDEV_UNIX_FD_PASS) &&
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             virQEMUCapsGet(qemuCaps, QEMU_CAPS_CHARDEV_FD_PASS)) {
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             if (qemuSecuritySetSocketLabel(secManager, (virDomainDefPtr)def) < 0)
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                 goto cleanup;
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diff --git a/tests/qemuxml2argvdata/serial-unix-chardev.args b/tests/qemuxml2argvdata/serial-unix-chardev.args
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index 584f4a1dd1..873d3263c6 100644
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--- a/tests/qemuxml2argvdata/serial-unix-chardev.args
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+++ b/tests/qemuxml2argvdata/serial-unix-chardev.args
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@@ -26,4 +26,6 @@ server,nowait \
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 -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \
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 -chardev socket,id=charserial0,path=/tmp/serial.sock \
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 -device isa-serial,chardev=charserial0,id=serial0 \
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+-chardev socket,id=charserial1,path=/tmp/serial-server.sock,server,nowait \
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+-device isa-serial,chardev=charserial1,id=serial1 \
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 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3
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diff --git a/tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args b/tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args
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new file mode 100644
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index 0000000000..ce7a7f80d7
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--- /dev/null
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+++ b/tests/qemuxml2argvdata/serial-unix-chardev.x86_64-latest.args
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@@ -0,0 +1,36 @@
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+LC_ALL=C \
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+PATH=/bin \
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+HOME=/home/test \
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+USER=test \
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+LOGNAME=test \
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+QEMU_AUDIO_DRV=none \
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+/usr/bin/qemu-system-i686 \
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+-name guest=QEMUGuest1,debug-threads=on \
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+-S \
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+-object secret,id=masterKey0,format=raw,\
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+file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
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+-machine pc,accel=tcg,usb=off,dump-guest-core=off \
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+-m 214 \
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+-realtime mlock=off \
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+-smp 1,sockets=1,cores=1,threads=1 \
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+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
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+-display none \
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+-no-user-config \
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+-nodefaults \
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+-chardev socket,id=charmonitor,fd=1729,server,nowait \
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+-mon chardev=charmonitor,id=monitor,mode=control \
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+-rtc base=utc \
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+-no-shutdown \
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+-no-acpi \
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+-boot strict=on \
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+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
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+-drive file=/dev/HostVG/QEMUGuest1,format=raw,if=none,id=drive-ide0-0-0 \
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+-device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
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+-chardev socket,id=charserial0,path=/tmp/serial.sock \
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+-device isa-serial,chardev=charserial0,id=serial0 \
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+-chardev socket,id=charserial1,fd=1729,server,nowait \
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+-device isa-serial,chardev=charserial1,id=serial1 \
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+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2 \
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+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
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+resourcecontrol=deny \
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+-msg timestamp=on
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diff --git a/tests/qemuxml2argvdata/serial-unix-chardev.xml b/tests/qemuxml2argvdata/serial-unix-chardev.xml
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index 04f83779ce..af513d6445 100644
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--- a/tests/qemuxml2argvdata/serial-unix-chardev.xml
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+++ b/tests/qemuxml2argvdata/serial-unix-chardev.xml
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@@ -25,6 +25,10 @@
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       <source mode='connect' path='/tmp/serial.sock'/>
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       <target port='0'/>
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     </serial>
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+    <serial type='unix'>
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+      <source mode='bind' path='/tmp/serial-server.sock'/>
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+      <target port='1'/>
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+    </serial>
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     <console type='unix'>
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       <source mode='connect' path='/tmp/serial.sock'/>
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       <target port='0'/>
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diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
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index 2d52f352b0..3be5af03aa 100644
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--- a/tests/qemuxml2argvtest.c
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+++ b/tests/qemuxml2argvtest.c
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@@ -1335,6 +1335,7 @@ mymain(void)
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             QEMU_CAPS_CHARDEV_FILE_APPEND);
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     DO_TEST("serial-unix-chardev",
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             QEMU_CAPS_DEVICE_ISA_SERIAL);
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+    DO_TEST_CAPS_LATEST("serial-unix-chardev");
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     DO_TEST("serial-tcp-chardev",
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             QEMU_CAPS_DEVICE_ISA_SERIAL);
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     DO_TEST("serial-udp-chardev",
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-- 
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2.18.0
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