Re: [libvirt] [Qemu-devel] Qemu migration with vhost-user-blk on top of local storage
by Stefan Hajnoczi
On Wed, Jan 09, 2019 at 06:23:42PM +0800, wuzhouhui wrote:
> Hi everyone,
>
> I'm working qemu with vhost target (e.g. spdk), and I attempt to migrate VM with
> 2 local storages. One local storage is a regular file, e.g. /tmp/c74.qcow2, and
> the other is a malloc bdev that spdk created. This malloc bdev will exported to
> VM via vhost-user-blk. When I execute following command:
>
> virsh migrate --live --persistent --unsafe --undefinesource --copy-storage-all \
> --p2p --auto-converge --verbose --desturi qemu+tcp://<uri>/system vm0
>
> The libvirt reports:
>
> qemu-2.12.1: error: internal error: unable to execute QEMU command \
> 'nbd-server-add': Cannot find device=drive-virtio-disk1 nor \
> node_name=drive-virtio-disk1
Please post your libvirt domain XML.
> Does it means that qemu with spdk on top of local storage don't support migration?
>
> QEMU: 2.12.1
> SPDK: 18.10
vhost-user-blk bypasses the QEMU block layer, so NBD storage migration
at the QEMU level will not work for the vhost-user-blk disk.
Stefan
1 year
[libvirt] [PATCH v3] openvswitch: Add new port VLAN mode "dot1q-tunnel"
by luzhipeng＠uniudc.com
From: ZhiPeng Lu <luzhipeng(a)uniudc.com>
Signed-off-by: ZhiPeng Lu <luzhipeng(a)uniudc.com>
---
v1->v2:
1. Fix "make syntax-check" failure
v2->v3:
1. remove other_config when updating vlan
docs/formatnetwork.html.in | 17 +++++++++--------
docs/schemas/networkcommon.rng | 1 +
src/conf/netdev_vlan_conf.c | 2 +-
src/util/virnetdevopenvswitch.c | 7 +++++++
src/util/virnetdevvlan.h | 1 +
5 files changed, 19 insertions(+), 9 deletions(-)
diff --git a/docs/formatnetwork.html.in b/docs/formatnetwork.html.in
index 363a72b..3c1ae62 100644
--- a/docs/formatnetwork.html.in
+++ b/docs/formatnetwork.html.in
@@ -688,16 +688,17 @@
</p>
<p>
For network connections using Open vSwitch it is also possible
- to configure 'native-tagged' and 'native-untagged' VLAN modes
+ to configure 'native-tagged' and 'native-untagged' and 'dot1q-tunnel'
+ VLAN modes.
<span class="since">Since 1.1.0.</span> This is done with the
- optional <code>nativeMode</code> attribute on
- the <code><tag></code> subelement: <code>nativeMode</code>
- may be set to 'tagged' or 'untagged'. The <code>id</code>
- attribute of the <code><tag></code> subelement
- containing <code>nativeMode</code> sets which VLAN is considered
- to be the "native" VLAN for this interface, and
+ optional <code>nativeMode</code> attribute on the
+ <code><tag></code> subelement: <code>nativeMode</code>
+ may be set to 'tagged' or 'untagged' or 'dot1q-tunnel'.
+ The <code>id</code> attribute of the <code><tag></code>
+ subelement containing <code>nativeMode</code> sets which VLAN is
+ considered to be the "native" VLAN for this interface, and
the <code>nativeMode</code> attribute determines whether or not
- traffic for that VLAN will be tagged.
+ traffic for that VLAN will be tagged or QinQ.
</p>
<p>
<code><vlan></code> elements can also be specified in
diff --git a/docs/schemas/networkcommon.rng b/docs/schemas/networkcommon.rng
index 2699555..11c48ff 100644
--- a/docs/schemas/networkcommon.rng
+++ b/docs/schemas/networkcommon.rng
@@ -223,6 +223,7 @@
<choice>
<value>tagged</value>
<value>untagged</value>
+ <value>dot1q-tunnel</value>
</choice>
</attribute>
</optional>
diff --git a/src/conf/netdev_vlan_conf.c b/src/conf/netdev_vlan_conf.c
index dff49c6..79710d9 100644
--- a/src/conf/netdev_vlan_conf.c
+++ b/src/conf/netdev_vlan_conf.c
@@ -29,7 +29,7 @@
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_ENUM_IMPL(virNativeVlanMode, VIR_NATIVE_VLAN_MODE_LAST,
- "default", "tagged", "untagged")
+ "default", "tagged", "untagged", "dot1q-tunnel")
int
virNetDevVlanParse(xmlNodePtr node, xmlXPathContextPtr ctxt, virNetDevVlanPtr def)
diff --git a/src/util/virnetdevopenvswitch.c b/src/util/virnetdevopenvswitch.c
index 8fe06fd..9fec30b 100644
--- a/src/util/virnetdevopenvswitch.c
+++ b/src/util/virnetdevopenvswitch.c
@@ -91,6 +91,11 @@ virNetDevOpenvswitchConstructVlans(virCommandPtr cmd, virNetDevVlanPtr virtVlan)
virCommandAddArg(cmd, "vlan_mode=native-untagged");
virCommandAddArgFormat(cmd, "tag=%d", virtVlan->nativeTag);
break;
+ case VIR_NATIVE_VLAN_MODE_DOT1Q_TUNNEL:
+ virCommandAddArg(cmd, "vlan_mode=dot1q-tunnel");
+ virCommandAddArg(cmd, "other_config:qinq-ethtype=802.1q");
+ virCommandAddArgFormat(cmd, "tag=%d", virtVlan->nativeTag);
+ break;
case VIR_NATIVE_VLAN_MODE_DEFAULT:
default:
break;
@@ -504,6 +509,8 @@ int virNetDevOpenvswitchUpdateVlan(const char *ifname,
"--", "--if-exists", "clear", "Port", ifname, "tag",
"--", "--if-exists", "clear", "Port", ifname, "trunk",
"--", "--if-exists", "clear", "Port", ifname, "vlan_mode",
+ "--", "--if-exists", "remove", "Port", ifname, "other_config",
+ "qinq-ethtype", NULL,
"--", "--if-exists", "set", "Port", ifname, NULL);
if (virNetDevOpenvswitchConstructVlans(cmd, virtVlan) < 0)
diff --git a/src/util/virnetdevvlan.h b/src/util/virnetdevvlan.h
index be85f59..0667f9d 100644
--- a/src/util/virnetdevvlan.h
+++ b/src/util/virnetdevvlan.h
@@ -29,6 +29,7 @@ typedef enum {
VIR_NATIVE_VLAN_MODE_DEFAULT = 0,
VIR_NATIVE_VLAN_MODE_TAGGED,
VIR_NATIVE_VLAN_MODE_UNTAGGED,
+ VIR_NATIVE_VLAN_MODE_DOT1Q_TUNNEL,
VIR_NATIVE_VLAN_MODE_LAST
} virNativeVlanMode;
--
1.8.3.1
1 year
[libvirt] [PATCH] Fix compile error for stable 1.2.9
by Yang hongyang
Seems a backport miss. An extra member is passed to struct
virLXCBasicMountInfo.
Signed-off-by: Yang hongyang <hongyang.yang(a)easystack.cn>
---
src/lxc/lxc_container.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index 28dabec..1c65fa9 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -760,7 +760,7 @@ typedef struct {
static const virLXCBasicMountInfo lxcBasicMounts[] = {
{ "proc", "/proc", "proc", MS_NOSUID|MS_NOEXEC|MS_NODEV, false, false },
- { "/proc/sys", "/proc/sys", NULL, MS_BIND|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false, false },
+ { "/proc/sys", "/proc/sys", NULL, MS_BIND|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false },
{ "sysfs", "/sys", "sysfs", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false },
{ "securityfs", "/sys/kernel/security", "securityfs", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, true, true },
#if WITH_SELINUX
--
1.7.1
1 year
[libvirt] Supporting vhost-net and macvtap in libvirt for QEMU
by Anthony Liguori
Disclaimer: I am neither an SR-IOV nor a vhost-net expert, but I've CC'd
people that are who can throw tomatoes at me for getting bits wrong :-)
I wanted to start a discussion about supporting vhost-net in libvirt.
vhost-net has not yet been merged into qemu but I expect it will be soon
so it's a good time to start this discussion.
There are two modes worth supporting for vhost-net in libvirt. The
first mode is where vhost-net backs to a tun/tap device. This is
behaves in very much the same way that -net tap behaves in qemu today.
Basically, the difference is that the virtio backend is in the kernel
instead of in qemu so there should be some performance improvement.
Current, libvirt invokes qemu with -net tap,fd=X where X is an already
open fd to a tun/tap device. I suspect that after we merge vhost-net,
libvirt could support vhost-net in this mode by just doing -net
vhost,fd=X. I think the only real question for libvirt is whether to
provide a user visible switch to use vhost or to just always use vhost
when it's available and it makes sense. Personally, I think the later
makes sense.
The more interesting invocation of vhost-net though is one where the
vhost-net device backs directly to a physical network card. In this
mode, vhost should get considerably better performance than the current
implementation. I don't know the syntax yet, but I think it's
reasonable to assume that it will look something like -net
tap,dev=eth0. The effect will be that eth0 is dedicated to the guest.
On most modern systems, there is a small number of network devices so
this model is not all that useful except when dealing with SR-IOV
adapters. In that case, each physical device can be exposed as many
virtual devices (VFs). There are a few restrictions here though. The
biggest is that currently, you can only change the number of VFs by
reloading a kernel module so it's really a parameter that must be set at
startup time.
I think there are a few ways libvirt could support vhost-net in this
second mode. The simplest would be to introduce a new tag similar to
<source network='br0'>. In fact, if you probed the device type for the
network parameter, you could probably do something like <source
network='eth0'> and have it Just Work.
Another model would be to have libvirt see an SR-IOV adapter as a
network pool whereas it handled all of the VF management. Considering
how inflexible SR-IOV is today, I'm not sure whether this is the best model.
Has anyone put any more thought into this problem or how this should be
modeled in libvirt? Michael, could you share your current thinking for
-net syntax?
--
Regards,
Anthony Liguori
1 year
[PATCH 0/2] Minor fixes to the RPM spec
by Neal Gompa
As part of the work to add openSUSE support to the spec file,
I discovered a couple of small fixes worth submitting separately.
Neal Gompa (2):
rpm: Simplify expression of supported platforms
rpm: Drop unnecessary libiscsi runtime dependency
libvirt.spec.in | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--
2.29.2
3 years, 5 months
[PATCH] Deprecate pmem=on with non-DAX capable backend file
by Igor Mammedov
It is not safe to pretend that emulated NVDIMM supports
persistence while backend actually failed to enable it
and used non-persistent mapping as fall back.
Instead of falling-back, QEMU should be more strict and
error out with clear message that it's not supported.
So if user asks for persistence (pmem=on), they should
store backing file on NVDIMM.
Signed-off-by: Igor Mammedov <imammedo(a)redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd(a)redhat.com>
---
v2:
rephrase deprecation comment andwarning message
(Philippe Mathieu-Daudé <philmd(a)redhat.com>)
---
docs/system/deprecated.rst | 17 +++++++++++++++++
util/mmap-alloc.c | 3 +++
2 files changed, 20 insertions(+)
diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index bacd76d7a5..e79fb02b3a 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -327,6 +327,23 @@ The Raspberry Pi machines come in various models (A, A+, B, B+). To be able
to distinguish which model QEMU is implementing, the ``raspi2`` and ``raspi3``
machines have been renamed ``raspi2b`` and ``raspi3b``.
+Backend options
+---------------
+
+Using non-persistent backing file with pmem=on (since 6.0)
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+This option is used when ``memory-backend-file`` is consumed by emulated NVDIMM
+device. However enabling ``memory-backend-file.pmem`` option, when backing file
+is (a) not DAX capable or (b) not on a filesystem that support direct mapping
+of persistent memory, is not safe and may lead to data loss or corruption in case
+of host crash.
+Options are:
+ - modify VM configuration to set ``pmem=off`` to continue using fake NVDIMM
+ (without persistence guaranties) with backing file on non DAX storage
+ - move backing file to NVDIMM storage and keep ``pmem=on``
+ (to have NVDIMM with persistence guaranties).
+
Device options
--------------
diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c
index 27dcccd8ec..0388cc3be2 100644
--- a/util/mmap-alloc.c
+++ b/util/mmap-alloc.c
@@ -20,6 +20,7 @@
#include "qemu/osdep.h"
#include "qemu/mmap-alloc.h"
#include "qemu/host-utils.h"
+#include "qemu/error-report.h"
#define HUGETLBFS_MAGIC 0x958458f6
@@ -166,6 +167,8 @@ void *qemu_ram_mmap(int fd,
"crash.\n", file_name);
g_free(proc_link);
g_free(file_name);
+ warn_report("Using non DAX backing file with 'pmem=on' option"
+ " is deprecated");
}
/*
* if map failed with MAP_SHARED_VALIDATE | MAP_SYNC,
--
2.27.0
3 years, 6 months
[PATCH-for-5.2] target/mips: Deprecate nanoMIPS ISA
by Philippe Mathieu-Daudé
The nanoMIPS ISA has been announced in 2018 for various projects:
GCC: https://gcc.gnu.org/legacy-ml/gcc/2018-05/msg00012.html
Linux: https://lwn.net/Articles/753605/
QEMU: https://www.mail-archive.com/qemu-devel@nongnu.org/msg530721.html
Unfortunately the links referenced doesn't work anymore (www.mips.com).
>From this Wayback machine link [1] we can get to a working place to
download a toolchain (a more recent release than the one referenced
in the announcement mails):
http://codescape.mips.com/components/toolchain/nanomips/2018.04-02/downlo...
The toolchain page mention LLVM but simply links http://llvm.org/
where there is no reference on nanoMIPS.
The only reference in the GCC mailing list, is the nanoMIPS
announcement: https://gcc.gnu.org/pipermail/gcc/2018-May.txt
The developer who authored the announcements have been emailed [2]
to ask for more information but all their emails are now bouncing:
- Your message to Stefan.Markovic(a)mips.com couldn't be delivered.
- Your message to smarkovic(a)wavecomp.com couldn't be delivered.
- Couldn't deliver the message to the following recipients:
Robert.Suchanek(a)mips.com, matthew.fortune(a)mips.com,
marcin.nowakowski(a)mips.com
Our deprecation policy do not allow feature removal before 2 release,
therefore declare the nanoMIPS ISA code deprecated as of QEMU 5.2.
This gives time to developers to update the QEMU community, or
interested parties to step in to maintain this code.
[1] https://web.archive.org/web/20180904044530/https://www.mips.com/develop/t...
[2] https://www.mail-archive.com/qemu-devel@nongnu.org/msg756392.html
Signed-off-by: Philippe Mathieu-Daudé <f4bug(a)amsat.org>
---
docs/system/deprecated.rst | 23 +++++++++++++++++++++++
MAINTAINERS | 6 +++++-
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index 32a0e620dbb..a26af200c73 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -310,6 +310,13 @@ to build binaries for it.
``Icelake-Client`` CPU Models are deprecated. Use ``Icelake-Server`` CPU
Models instead.
+MIPS ``I7200`` CPU Model (since 5.2)
+''''''''''''''''''''''''''''''''''''
+
+The ``I7200`` guest CPU relies on the nanoMIPS ISA, which is deprecated
+(the ISA has never been upstreamed to a compiler toolchain). Therefore
+this CPU is also deprecated.
+
System emulator devices
-----------------------
@@ -413,6 +420,13 @@ The ``ppc64abi32`` architecture has a number of issues which regularly
trip up our CI testing and is suspected to be quite broken. For that
reason the maintainers strongly suspect no one actually uses it.
+MIPS ``I7200`` CPU (since 5.2)
+''''''''''''''''''''''''''''''
+
+The ``I7200`` guest CPU relies on the nanoMIPS ISA, which is deprecated
+(the ISA has never been upstreamed to a compiler toolchain). Therefore
+this CPU is also deprecated.
+
Related binaries
----------------
@@ -477,6 +491,15 @@ versions, aliases will point to newer CPU model versions
depending on the machine type, so management software must
resolve CPU model aliases before starting a virtual machine.
+Guest Emulator ISAs
+-------------------
+
+nanoMIPS ISA
+''''''''''''
+
+The ``nanoMIPS`` ISA has never been upstreamed to any compiler toolchain.
+As it is hard to generate binaries for it, declare it deprecated.
+
Recently removed features
=========================
diff --git a/MAINTAINERS b/MAINTAINERS
index 2c22bbca5ac..4f701012eea 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -227,7 +227,7 @@ R: Aleksandar Rikalo <aleksandar.rikalo(a)syrmia.com>
S: Odd Fixes
F: target/mips/
F: default-configs/*mips*
-F: disas/*mips*
+F: disas/mips.c
F: docs/system/cpu-models-mips.rst.inc
F: hw/intc/mips_gic.c
F: hw/mips/
@@ -240,6 +240,10 @@ F: include/hw/timer/mips_gictimer.h
F: tests/tcg/mips/
K: ^Subject:.*(?i)mips
+MIPS TCG CPUs (nanoMIPS ISA)
+S: Orphan
+F: disas/nanomips.*
+
Moxie TCG CPUs
M: Anthony Green <green(a)moxielogic.com>
S: Maintained
--
2.26.2
3 years, 7 months
[PATCH 00/23] RFC: get rid of macros when dealing with block io tunes
by Nikolay Shirokovskiy
Hi, all.
I started this work as adding missing parts/fixing issues/etc in block iotune
code but then turned to refactoring code. We use a lot of macros in this place
and if we get rid of them I belive we will have much more readable/reusable/
extendable code.
Most of macros usage is for iterating over unsigned long long values. I'm
talking about parsing/formating xml, converting from/to virTypedParameterPtr
list etc. These places do not care about tune semantics and thus we can
add tools for the said iteration. See patch [1] for the first such conversion.
Patches before it partially prepare for this conversion, partially just
improve code reuse and add missing parts.
The work on removing macros in code handling iotunes is not finished as
I wanted to get an approvement that I have taken a right direction. At the
same time series shows the potential of the approach (take a look on how
qemuDomainSetBlockIoTune and testDomainSetBlockIoTune are looking now!).
Some places like qemuDomainSetBlockIoTuneDefaults deal with fields semantics.
So we need another approach to remove macros there but it is a matter of
a different RFC.
Nikolay Shirokovskiy (23):
qemu: pass supportGroupNameOption as expected
qemu: factor out qemuValidateDomainBlkdeviotune
qemu: reuse validation in qemuDomainSetBlockIoTune
qemu: remove extra check for QEMU_BLOCK_IOTUNE_MAX
conf: factor out virDomainBlockIoTuneValidate
qemu: reuse virDomainBlockIoTuneValidate
test driver: reuse virDomainBlockIoTuneValidate
qemu: reset max iotune setting when needed
qemu: add max iotune settings check to virDomainBlockIoTuneValidate
qemu: remove iotune max checks
test driver: remove iotune max checks
qemu: prepare for removing qemuBlockIoTuneSetFlags
qemu: use group_name instead of QEMU_BLOCK_IOTUNE_SET_GROUP_NAME
qemu: remove qemuBlockIoTuneSetFlags usage in qemuDomainSetBlockIoTune
qemu: remove qemuBlockIoTuneSetFlags enum completly
conf: get rid of macros in virDomainDiskDefIotuneParse [1]
conf: get rid of macros in virDomainDiskDefFormatIotune
conf: add virDomainBlockIoTuneFromParams
conf: add virDomainBlockIoTuneToEventParams
qemu: qemuDomainSetBlockIoTune use functions to convert to/from params
test driver: remove TEST_BLOCK_IOTUNE_MAX checks
test driver: prepare to delete macros in testDomainSetBlockIoTune
test driver: testDomainSetBlockIoTune: use functions to convert
to/from params
src/conf/domain_conf.c | 303 +++++++++++++++++++++++++++++++++--------------
src/conf/domain_conf.h | 16 +++
src/libvirt_private.syms | 3 +
src/qemu/qemu_driver.c | 281 ++++++++++++-------------------------------
src/qemu/qemu_validate.c | 100 +++++++++-------
src/qemu/qemu_validate.h | 4 +
src/test/test_driver.c | 156 ++----------------------
7 files changed, 380 insertions(+), 483 deletions(-)
--
1.8.3.1
3 years, 7 months
