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From eb7fe047e08a536a6c888e61fbe5b149ecb6ce6a Mon Sep 17 00:00:00 2001
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Message-Id: <eb7fe047e08a536a6c888e61fbe5b149ecb6ce6a@dist-git>
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From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
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Date: Wed, 4 Mar 2020 12:42:49 +0100
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Subject: [PATCH] qemu: build vhost-user-fs device command line
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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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Format the 'vhost-user-fs' device on the QEMU command line.
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This device provides shared file system access using the FUSE protocol
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carried over virtio.
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The actual file server is implemented in an external vhost-user-fs device
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backend process.
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https://bugzilla.redhat.com/show_bug.cgi?id=1694166
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Signed-off-by: Ján Tomko <jtomko@redhat.com>
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Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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Reviewed-by: Peter Krempa <pkrempa@redhat.com>
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Tested-by: Andrea Bolognani <abologna@redhat.com>
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(cherry picked from commit 0627150a56fd53841918d558d8466feceb18552a)
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Signed-off-by: Ján Tomko <jtomko@redhat.com>
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https://bugzilla.redhat.com/show_bug.cgi?id=1694166
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Message-Id: <2df3adbe3991cb97a06707e818c30dfcb1f6de26.1583322091.git.jtomko@redhat.com>
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Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
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---
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src/qemu/qemu_command.c | 46 +++++++++++++++++-
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...vhost-user-fs-fd-memory.x86_64-latest.args | 39 +++++++++++++++
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...vhost-user-fs-hugepages.x86_64-latest.args | 47 +++++++++++++++++++
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tests/qemuxml2argvtest.c | 3 ++
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4 files changed, 133 insertions(+), 2 deletions(-)
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create mode 100644 tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
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create mode 100644 tests/qemuxml2argvdata/vhost-user-fs-hugepages.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 7fdf58f067..fc5366d88d 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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@@ -2589,6 +2589,46 @@ qemuBuildDisksCommandLine(virCommandPtr cmd,
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}
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+static int
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+qemuBuildVHostUserFsCommandLine(virCommandPtr cmd,
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+ virDomainFSDef *fs,
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+ const virDomainDef *def,
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+ qemuDomainObjPrivatePtr priv)
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+{
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+ g_autofree char *chardev_alias = NULL;
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+ g_auto(virBuffer) opt = VIR_BUFFER_INITIALIZER;
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+
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+ chardev_alias = g_strdup_printf("chr-vu-%s", fs->info.alias);
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+
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+ virCommandAddArg(cmd, "-chardev");
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+ virBufferAddLit(&opt, "socket");
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+ virBufferAsprintf(&opt, ",id=%s", chardev_alias);
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+ virBufferAddLit(&opt, ",path=");
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+ virQEMUBuildBufferEscapeComma(&opt, QEMU_DOMAIN_FS_PRIVATE(fs)->vhostuser_fs_sock);
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+ virCommandAddArgBuffer(cmd, &opt;;
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+
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+ virCommandAddArg(cmd, "-device");
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+
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+ if (qemuBuildVirtioDevStr(&opt, "vhost-user-fs", priv->qemuCaps,
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+ VIR_DOMAIN_DEVICE_FS, fs) < 0)
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+ return -1;
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+
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+ virBufferAsprintf(&opt, ",chardev=%s", chardev_alias);
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+ if (fs->queue_size)
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+ virBufferAsprintf(&opt, ",queue-size=%llu", fs->queue_size);
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+ virBufferAddLit(&opt, ",tag=");
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+ virQEMUBuildBufferEscapeComma(&opt, fs->dst);
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+ if (qemuBuildVirtioOptionsStr(&opt, fs->virtio, priv->qemuCaps) < 0)
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+ return -1;
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+
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+ if (qemuBuildDeviceAddressStr(&opt, def, &fs->info, priv->qemuCaps) < 0)
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+ return -1;
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+
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+ virCommandAddArgBuffer(cmd, &opt;;
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+ return 0;
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+}
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+
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+
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static char *
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qemuBuildFSStr(virDomainFSDefPtr fs)
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{
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@@ -2681,7 +2721,7 @@ static int
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qemuBuildFilesystemCommandLine(virCommandPtr cmd,
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const virDomainDef *def,
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virQEMUCapsPtr qemuCaps,
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- qemuDomainObjPrivatePtr priv G_GNUC_UNUSED)
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+ qemuDomainObjPrivatePtr priv)
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{
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size_t i;
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@@ -2696,7 +2736,9 @@ qemuBuildFilesystemCommandLine(virCommandPtr cmd,
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break;
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case VIR_DOMAIN_FS_DRIVER_TYPE_VIRTIOFS:
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- /* TODO: vhost-user-fs-pci */
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+ /* vhost-user-fs-pci */
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+ if (qemuBuildVHostUserFsCommandLine(cmd, def->fss[i], def, priv) < 0)
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+ return -1;
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break;
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case VIR_DOMAIN_FS_DRIVER_TYPE_LOOP:
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diff --git a/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
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new file mode 100644
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index 0000000000..a7df45a7f0
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--- /dev/null
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+++ b/tests/qemuxml2argvdata/vhost-user-fs-fd-memory.x86_64-latest.args
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@@ -0,0 +1,39 @@
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+LC_ALL=C \
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+PATH=/bin \
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+HOME=/tmp/lib/domain--1-guest \
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+USER=test \
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+LOGNAME=test \
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+XDG_DATA_HOME=/tmp/lib/domain--1-guest/.local/share \
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+XDG_CACHE_HOME=/tmp/lib/domain--1-guest/.cache \
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+XDG_CONFIG_HOME=/tmp/lib/domain--1-guest/.config \
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+QEMU_AUDIO_DRV=none \
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+/usr/bin/qemu-system-x86_64 \
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+-name guest=guest,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-guest/master-key.aes \
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+-machine pc,accel=kvm,usb=off,dump-guest-core=off \
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+-cpu qemu64 \
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+-m 14336 \
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+-overcommit mem-lock=off \
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+-smp 2,sockets=2,cores=1,threads=1 \
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+-object memory-backend-file,id=ram-node0,\
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+mem-path=/var/lib/libvirt/qemu/ram/libvirt/qemu/-1-guest/ram-node0,share=yes,\
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+size=15032385536 \
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+-numa node,nodeid=0,cpus=0-1,memdev=ram-node0 \
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+-uuid 126f2720-6f8e-45ab-a886-ec9277079a67 \
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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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+-chardev socket,id=chr-vu-fs0,path=/tmp/lib/domain--1-guest/fs0.vhost-fs.sock \
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+-device vhost-user-fs-pci,chardev=chr-vu-fs0,queue-size=1024,tag=mount_tag,\
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+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/vhost-user-fs-hugepages.x86_64-latest.args b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
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new file mode 100644
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index 0000000000..39190b8d3e
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--- /dev/null
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+++ b/tests/qemuxml2argvdata/vhost-user-fs-hugepages.x86_64-latest.args
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@@ -0,0 +1,47 @@
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+LC_ALL=C \
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+PATH=/bin \
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+HOME=/tmp/lib/domain--1-guest \
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+USER=test \
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+LOGNAME=test \
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+XDG_DATA_HOME=/tmp/lib/domain--1-guest/.local/share \
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+XDG_CACHE_HOME=/tmp/lib/domain--1-guest/.cache \
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+XDG_CONFIG_HOME=/tmp/lib/domain--1-guest/.config \
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+QEMU_AUDIO_DRV=none \
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+/usr/bin/qemu-system-x86_64 \
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+-name guest=guest,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-guest/master-key.aes \
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+-machine q35,accel=tcg,usb=off,dump-guest-core=off \
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+-cpu qemu64 \
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+-m 2048 \
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+-overcommit mem-lock=off \
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+-smp 2,sockets=2,cores=1,threads=1 \
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+-object memory-backend-file,id=ram-node0,prealloc=yes,\
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+mem-path=/dev/hugepages2M/libvirt/qemu/-1-guest,share=yes,size=2147483648 \
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+-numa node,nodeid=0,cpus=0-1,memdev=ram-node0 \
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+-uuid 1ccfd97d-5eb4-478a-bbe6-88d254c16db7 \
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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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+-boot strict=on \
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+-device pcie-root-port,port=0x8,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,\
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+addr=0x1 \
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+-device pcie-root-port,port=0x9,chassis=2,id=pci.2,bus=pcie.0,addr=0x1.0x1 \
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+-device pcie-root-port,port=0xa,chassis=3,id=pci.3,bus=pcie.0,addr=0x1.0x2 \
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+-device pcie-root-port,port=0xb,chassis=4,id=pci.4,bus=pcie.0,addr=0x1.0x3 \
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+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/images/guest.qcow2",\
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+"node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
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+-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"qcow2",\
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+"file":"libvirt-1-storage"}' \
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+-device virtio-blk-pci,scsi=off,bus=pci.4,addr=0x0,drive=libvirt-1-format,\
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+id=virtio-disk0,bootindex=1 \
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+-chardev socket,id=chr-vu-fs0,path=/tmp/lib/domain--1-guest/fs0.vhost-fs.sock \
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+-device vhost-user-fs-pci,chardev=chr-vu-fs0,tag=mount_tag,bus=pci.1,addr=0x0 \
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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/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
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index a391823090..265ffce465 100644
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--- a/tests/qemuxml2argvtest.c
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+++ b/tests/qemuxml2argvtest.c
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@@ -3053,6 +3053,9 @@ mymain(void)
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DO_TEST_CAPS_VER("launch-security-sev", "2.12.0");
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+ DO_TEST_CAPS_LATEST("vhost-user-fs-fd-memory");
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+ DO_TEST_CAPS_LATEST("vhost-user-fs-hugepages");
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+
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DO_TEST("riscv64-virt",
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QEMU_CAPS_DEVICE_VIRTIO_MMIO);
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DO_TEST("riscv64-virt-pci",
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--
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2.25.1
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