[RFC PATCH 0/1] support deprecated-props from query-cpu-model-expansion
by Collin Walling
Overview
========
QEMU will soon support reporting an optional array of deprecated features for an expanded CPU model via the query-cpu-model-expansion command. The intended use of this data is to make it easier for a user to define a CPU model with features flagged as deprecated set to disabled, thus rendering the guest migratable to future hardware that will out-right drop support for said features.
Attached to this cover letter is only half of the bigger picture. I've updated the CPU model expansion ABI to parse the new array (if it's available) and store the result in a string list within the qemuMonitorCPUModelInfo struct. I also propose an approach on how to store/retrieve the list of deprecated features in the qemuCaps cache file. All feedback on this patch is certainly welcome. Please note: I do not provide any updates to the respective qemuCaps tests right now.
The main goal of this post is to discuss the other half of the design: reporting and enabling a CPU model with deprecated features disabled. I believe the ideal solution involves a way for the user to easily configure their guest with this new data. Two ideas I currently have are outlined below. Other approaches are encouraged.
Notes
=====
- In my example below, I am running on a z14.2 machine.
- The features that are flagged as deprecated for this model are: bpb, csske, cte, te.
- The discussion regarding the QEMU changes can be found here: https://mail.gnu.org/archive/html/qemu-devel/2024-04/msg04605.html
Example of Desired Changes
==========================
Here is what I'd like the resulting guest's transient XML to look like for the <cpu> section (I have trimmed the features list for brevity):
...
<cpu mode='custom' match='exact' check='partial'>
<model fallback='forbid'>z14.2-base</model>
<feature policy='require' name='aen'/>
<feature policy='require' name='cmmnt'/>
<feature policy='require' name='aefsi'/>
...
<feature policy='disable' name='cte'/> ***
<feature policy='require' name='ais'/>
<feature policy='disable' name='bpb'/> ***
<feature policy='require' name='ctop'/>
<feature policy='require' name='gs'/>
<feature policy='require' name='ppa15'/>
<feature policy='require' name='zpci'/>
<feature policy='require' name='sea_esop2'/>
<feature policy='disable' name='te'/> ***
<feature policy='require' name='cmm'/>
<feature policy='disable' name='csske'/> ***
</cpu>
...
Ideas
=====
New Host CPU Model
------------------
Create a new CPU model that is a mirror of the host CPU model with deprecated features turned off. Let's call this model "host-recommended". A user may define this model in the guest XML as they would any other CPU model:
<cpu mode='host-recommended' check='partial'/>
Just as how host-model works, anything defined nested in the <cpu> tag will be ignored.
This model could potentially be listed in the domcapabilities output after the host-model:
<cpu>
<mode name='host-passthrough' supported='yes'>
...
</mode>
...
<mode name='host-model' supported='yes'>
...
</mode>
<mode name='host-recommended' supported='yes'>
...
<feature policy='disable' name='cte'/>
<feature policy='require' name='ais'/>
<feature policy='disable' name='bpb'/>
<feature policy='require' name='ctop'/>
<feature policy='require' name='gs'/>
<feature policy='require' name='ppa15'/>
<feature policy='require' name='zpci'/>
<feature policy='require' name='sea_esop2'/>
<feature policy='disable' name='te'/>
<feature policy='require' name='cmm'/>
<feature policy='disable' name='csske'/>
</cpu>
New Nested Element Under <cpu>
------------------------------
Create a new optional XML element nested under the <cpu> tag that may be used to disable deprecated features. This approach is more explicit compared to creating a new CPU model, and allows the user to disable these features when defining a specific model other than host-model. Here is an example of what the guest's defined XML for the CPU could look like:
<cpu mode='host-model' check='partial'>
<deprecated_features>off</deprecated_features>
</cpu>
However, a conflict arises with this approach: parameter priority. It would need to be discussed what the expected behavior should be if a user defines a guest with both a mode to disable deprecated features and any deprecated features listed with the 'require' policy, e.g.:
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>z13.2-base</model>
<!-- which one takes priority? -->
<deprecated_features>off</deprecated_features>
<feature policy='require' name='csske'/>
</cpu>
Another conflict is setting this option to "on" would have no effect on the CPU model (I can't think of a reason why someone would want to explicitly enable these features). This may not communicate well to the user.
To report these features, a <deprecatedProperties> tag could be added to the domcapabilities output using the same format I use in my proposed patch for the qemu capabilities file:
<cpu>
<mode name='host-passthrough' supported='yes'>
...
</mode>
...
<mode name='host-model' supported='yes'>
...
</mode>
<deprecatedProperties>
<property name='bpb'/>
<property name='te'/>
<property name='cte'/>
<property name='csske'/>
</deprecatedProperties>
</cpu>
Please let me know your thoughts. Once an approach is agreed upon, I will begin development.
Collin Walling (1):
qemu: monitor: parse deprecated-props from query-cpu-model-expansion
response
src/qemu/qemu_capabilities.c | 30 ++++++++++++++++++++++++++++++
src/qemu/qemu_monitor.h | 2 ++
src/qemu/qemu_monitor_json.c | 29 ++++++++++++++++++++++++-----
3 files changed, 56 insertions(+), 5 deletions(-)
--
2.43.0
1 year
[PATCH v2 00/20] node_dev_udev: use workerpool and improve nodedev events
by Marc Hartmayer
When an udev event occurs for a mediated device (mdev) the mdev config data
requires an update via mdevctl as the udev event does not contain all config
data. This update needs to occur immediately and to be finished before the
libvirt nodedev event is issued to keep the API usage reliable.
Changelog:
v1->v2:
+ squashed old patches 3 and 17 (comments from Jonathon and Boris)
+ added r-b's from Jonathon and Boris
+ worked in comments from Jonathon to old patch 15
+ added comment why only one worker can currently be used
+ added patch `node_device_udev: remove incorrect G_GNUC_UNUSED`
RFCv1->v1:
+ removed some of my own s-o-b's that were accidentally inserted in the RFC
+ added r-b's from Boris and Jonathon
+ worked in comments from Boris and Jonathon, but I did not inline
"nodeDeviceDefResetMdevActiveConfig" as I'm not sure whether this improves
the readability
+ reworked patch "[RFC PATCH v1 11/15] node_device_udev: Use
`stateShutdownPrepare` and `stateShutdownWait`"
+ reworked patch "node_device_udev: Use a worker pool for processing events and
emitting nodedev event"
+ added patches:
- node_device_udev: Move responsibility to release `(init|udev)Thread` to `udevEventDataDispose`
- node_device_udev: Fix leak of mdevctlLock, udevThreadCond, and mdevCtlMonitor
- node_device_udev: nodeStateShutdownPrepare: Disconnect the signals explicitly
- node_device_udev: Pass the driver state as parameter in prepartion for the next commit
- node_device_udev: Add support for `g_autoptr` to `udevEventData
- node_device_udev: Pass the `udevEventData` via parameter and use refcounting
Boris Fiuczynski (3):
nodedev: fix mdev add udev event data handling
nodedev: immediate update of active config on udev events
nodedev: reset active config data on udev remove event
Marc Hartmayer (17):
node_device_udev: Set @def to NULL
node_device_udev: Remove the timeout if the data is disposed
node_device_udev: Test for mdevctlTimeout != -1
node_device_udev: Don't take `mdevctlLock` for `mdevctl list` and add
comments about locking
node_device_udev: Take lock if `driver->privateData` is modified
node_device_udev: Add prefix `udev` for udev related data
node_device_udev: Inline `udevRemoveOneDevice`
node_device_udev: Move responsibility to release `(init|udev)Thread`
to `udevEventDataDispose`
node_device_udev: Fix leak of mdevctlLock, udevThreadCond, and
mdevCtlMonitors
node_device_udev: Introduce and use `stateShutdownPrepare` and
`stateShutdownWait`
node_device_udev: nodeStateShutdownPrepare: Disconnect the signals
explicitly
node_device_udev: Pass the driver state as parameter in preparation
for the next commit
node_device_udev: Use a worker pool for processing events and emitting
nodedev event
node_device_udev: Make the code easier to read
node_device_udev: Add support for `g_autoptr` to `udevEventData`
node_device_udev: Pass the `udevEventData` via parameter and use
refcounting
node_device_udev: remove incorrect G_GNUC_UNUSED
src/node_device/node_device_driver.h | 5 +-
src/util/virmdev.h | 4 +
src/conf/node_device_conf.c | 10 +-
src/node_device/node_device_driver.c | 28 +-
src/node_device/node_device_udev.c | 516 ++++++++++++++++++---------
src/test/test_driver.c | 11 +-
src/util/virmdev.c | 20 ++
src/libvirt_private.syms | 2 +
8 files changed, 398 insertions(+), 198 deletions(-)
base-commit: c38720b337f74337ec94c0fe2e97a7c2c57188ae
--
2.34.1
1 year
[PATCH 0/2] Make affinity setting a bit more debug friendly
by Michal Privoznik
*** BLURB HERE ***
Michal Prívozník (2):
qemu_process: Issue an info message when subtracting isolcpus
virprocess: Debug affinity map in virProcessSetAffinity()
src/qemu/qemu_process.c | 6 ++++++
src/util/virprocess.c | 6 ++++--
2 files changed, 10 insertions(+), 2 deletions(-)
--
2.43.2
1 year
[libvirt PATCH 00/28] native support for nftables in virtual network driver
by Laine Stump
This patch series enables libvirt to use nftables rules rather than
iptables *when setting up virtual networks* (it does *not* add
nftables support to the nwfilter driver). It accomplishes this by
abstracting several iptables functions (from viriptables.[ch] called
by the virtual network driver into a rudimentary "virNetfilter API"
(in virnetfilter.[ch], having the virtual network driver call the
virNetFilter API rather than calling the existing iptables functions
directly, and then finally adding an equivalent virNftables backend
that can be used instead of iptables (selected manually via a
network.conf setting, or automatically if iptables isn't found on the
host).
A first look at the result may have you thinking that it's filled with
a lot of bad decisions. While I would agree with that in many cases, I
think that overall they are the "least bad" decisions, or at least
"bad within acceptable limits / no worse than something else", and
point out that it's been done in a way that minimizes (actually
eliminates) the need for immediate changes to nwfilter (the other
consumer of iptables, which *also* needs to be updated to use native
nftables), and makes it much easier to change our mind about the
details in the future.
When I first started on this (long, protracted, repeatedly interrupted
for extended periods - many of these patches are > a year old) task, I
considered doing an all-at-once complete replacement of iptables with
nftables, since all the Linux distros we support have had nftables for
several years, and I'm pretty sure nobody has it disabled (not even
sure if it's possible to disable nftables while still enabling
iptables, since they both use xtables in the kernel). But due to
libvirt's use of "-t mangle -j CHECKSUM --checksum-fill" (see commit
fd5b15ff all the way back in July 2010 for details) which has no
equivalent in nftables rules (and we don't *want* it to!!), and the
desire to be able to easily switch back to iptables in case of an
unforeseen regression, we decided that both iptables and nftables need
to be supported (for now), with the default (for now) remaining as
iptables.
Just allowing for dual backends complicated matters, since it means
that we have to have a config file, a setting, detection of which
backends are available, and of course some sort of concept of an
abstracted frontend that can use either backend based on the config
setting (and/or auto-detection). Combining that with the fact that it
would just be "too big" of a project to switch over nwfilter's
iptables usage at the same time means that we have to keep around a
lot of existing code for compatibility's sake rather than just wiping
it all away and starting over.
So, what I've ended up with is:
1) a network.conf file (didn't exist before) with a single setting
"firewall_backend". If unset, the network driver tries to use iptables
on the backend, and if that's missing, then tries to use nftables.
2) a new (internal-only, so transient!) virNetFilterXXX API that is
used by the network driver in place of the iptablesXXX API, and calls
either iptablesXXX or:
3) a virNftablesXXX API that exactly replicates the filtering rules of
the existing iptablesXXX API (except in the custom "libvirt" base
table rather than the system "filter" and "nat" tables). This means
that:
4) when the nftables backend is used, the rules added are *exactly the
same* (functionally speaking) as we currently add for iptables (except
they are in the "libvirt" table).
We had spent some time in IRC discussing different ways of using new
functionality available in nftables to make a more
efficient/performant implemention of the desired filtering, and there
are some really great possibilities that need to be explored, but in
the end there were too many details up in the air, and I decided that
it would be more "accomplishable" (coined a new word there!) to first
replicate existing behavior with nftables, but do it inside a
framework that makes it easy to modify the details in the future (in
particular making it painless to switch back and forth between builds
with differing filter models at runtime) - this way we'll be able to
separate the infrastructure work from the details of the rules (which
we can then more easily work on and experiment with). (This implies
that the main objective right now is "get rid of iptables
dependencies", not "make the filtering faster and more efficient").
Notable features of this patchset:
* allows switching between iptables/nftables backends without
rebooting or restarting networks/guests.
Because the commands required to remove a network's filter rules are
now saved in the network status XML, each time libvirtd (or
virtnetworkd) is restarted, it will execute exactly the commands
needed to remove the filter rules that had been added by the
previous libvirtd/virtnetworkd (rather than just making a guess, as
we've always done up until now), and then add new rules using the
current backend+binary's set of rules (while also saving the info
needed for future removal of these new rules back into the network's
status XML).
* firewall_backend can be explicitly set in (new)
/etc/libvirt/network.conf, but if it's not explicitly set, libvirt
will default to the iptables backend if the iptables binary is
found, and otherwise fall back to nftables as long as the nft
binary is found; otherwise the first attempt to start a network will
fail with an appropriate error.
Things that seem ugly / that I would like to clean up / that I think
are just fine as they are:
* virFirewall does *not* provide a backend-agnostic interface [this is fine]
* We need to maintain a backward-compatible API for virFirewall so
that we don't have to touch nwfilter code. Trying to make its API
backend-agnostic would require individually considering/changing
every nwfilter use of virFirewall.
* instead virFirewall objects are just a way to build a collection
of commands to execute to build a firewall, then execute them
while collecting info for and building a collection of commands
that will tear down that firewall in the future.
Do I want to "fix" this in the future by making virFirewall a higher
level interface that accepts tokens describing the type of rule to
add (rather than backend-specific arguments to a backend-specific
command)? No. I think I like the way virFirewall works (as
described in that previous bullet-point), instead I'm thinking that
it is just slightly mis-named - I've lately been thinking of it as a
"virNetFilterCmdList". Similarly, the virFirewallRules that it has a
list of aren't really "rules", they are better described as commands
or actions, so maybe they should be renamed to virNetfilterCmd or
virNetfilterAction. But that is just cosmetic, so I didn't want to
get into it in these patches (especially in case someone disagrees,
or has a better idea for naming).
* Speaking of renaming - I should probably rename all the
"iptablesXXX" functions to "virIptablesXXX" to be consistent with so
much of our other code. I lost the ambition to deal with it right
now though, so I'm leaving that for later cleanup (or I could do it
now if it really makes someone's day :-).
* I could have chosen a higher place in the callchain to make the
virNetfilter abstraction, e.g. at the level of
"networkAddXXXFirewallRules()" rather than at the lower level of
iptablesXXX(). That is actually probably what will happen in the
future (since it will be necessary in order for an nftables-based
firewall to be significantly different in structure from an
iptables-based firewall). But that's the beauty of an API being
private - we can freely add/remove things as needed. the important
thing is that we now have the basic structure there.
For now, the split is just above the existing iptablesXXX API
(util/viriptables.[ch], which seems like a "narrow" enough
place. Most iptablesXXX functions are written in terms of just 10
*other* iptablesXXX functions that add iptables-specific commands -
I've just moved those functions into virnetfilter.[ch]
(appropriately renamed), and changed them to call the 10
virNetfilterXXX functions that will in-turn call those 10
iptablesXXX (or equivalent virNftablesXXX) functions.
* Some people may dislike that the 10 virNetfilterXXX functions are
each written with a switch statement that has cases to directly call
each backend, rather than each backend driver having a table of
pointers to API functions, with the virNetfilter API function
calling backends[fwBackend]->XXX() (ie the pattern for so many
drivers in libvirt). But for just 2 backends, that really seemed
like overkill and unnecessary obfuscation.
* As implemented here, I am storing a "<fwRemoval>" element in the
network status XML - it contains a serialized virFirewall object
that directly contains the commands necessary to remove the
firewall. I could instead just store "<firewall>", which would
include all the commands that were used to *create* the firewall in
addition to the commands needed to remove the firewall. The way it's
done currently takes up less space; switching to storing the full
firewall *might* be more informative to somebody, but on the other
hand would make the network status XML *very* long. If anybody has
an opinion about this, now is the time to bring it up - do you think
it's worth having a separate list of all the commands that were used
to create a network's firewall (keeping in mind that there is no
public API to access it)? Or is it enough to just store what's
needed to remove the firewall?
* Several months ago Eric Garver posted patches for a pure firewalld
backend, and I requested that they not be pushed because I wanted
that to be integrated with my nftables backend support. Due to the
fact that the firewalld backend is almost entirely implemented by
putting the bridge into a new firewalld "zone", with no individual
rules added, that won't happen as just another backend driver file
in parallel to iptables and nftables; it will instead work by
checking firewall_backend at a higher level in the network driver,
thus avoiding the calls to virNetfilterXXX() entirely. I have
locally merged Eric's patches over the top of these patches, and
there are surprisingly few conflicts, but since his patches didn't
account for a user-settable config (but instead just always used the
firewalld backend if firewalld was active), some of the patches are
going to require a bit of rework, which I'll take care of after
getting these patches in.
Laine Stump (28):
util: add -w/--concurrent when applying the rule rather than when
building it
util: new virFirewallRuleGet*() APIs
util: determine ignoreErrors value when creating rule, not when
applying
util: rename iptables helpers that will become the frontend for
ip&nftables
util: move backend-agnostic virNetfilter*() functions to their own
file
util: make netfilter action a proper typedefed (virFirewall) enum
util: #define the names used for private packet filter chains
util: move/rename virFirewallApplyRuleDirect to
virIptablesApplyFirewallRule
util/network: reintroduce virFirewallBackend, but different
network: add (empty) network.conf file to distribution files
network: allow setting firewallBackend from network.conf
network: do not add DHCP checksum mangle rule unless using iptables
network: call backend agnostic function to init private filter chains
util: setup functions in virnetfilter which will call appropriate
backend
build: add nft to the list of binaries we attempt to locate
util: add nftables backend to virnetfilter API used by network driver
tests: test cases for nftables backend
util: new functions to support adding individual rollback rules
util: check for 0 args when applying iptables rule
util: implement rollback rule autosave for iptables backend
util: implement rollback rule autosave for nftables backend
network: turn on auto-rollback for the rules added for virtual
networks
util: new function virFirewallNewFromRollback()
util: new functions virFirewallParseXML() and virFirewallFormat()
conf: add a virFirewall object to virNetworkObj
network: use previously saved list of firewall rules when removing
network: save network status when firewall rules are reloaded
network: improve log message when reloading virtual network firewall
rules
libvirt.spec.in | 5 +
meson.build | 1 +
po/POTFILES | 2 +
src/conf/virnetworkobj.c | 40 +
src/conf/virnetworkobj.h | 11 +
src/libvirt_private.syms | 68 +-
src/network/bridge_driver.c | 40 +-
src/network/bridge_driver_conf.c | 44 +
src/network/bridge_driver_conf.h | 3 +
src/network/bridge_driver_linux.c | 241 +++--
src/network/bridge_driver_nop.c | 6 +-
src/network/bridge_driver_platform.h | 6 +-
src/network/libvirtd_network.aug | 39 +
src/network/meson.build | 11 +
src/network/network.conf | 24 +
src/network/test_libvirtd_network.aug.in | 5 +
src/nwfilter/nwfilter_ebiptables_driver.c | 16 +-
src/util/meson.build | 2 +
src/util/virebtables.c | 4 +-
src/util/virfirewall.c | 490 ++++++++--
src/util/virfirewall.h | 51 +-
src/util/viriptables.c | 762 ++++-----------
src/util/viriptables.h | 222 ++---
src/util/virnetfilter.c | 892 ++++++++++++++++++
src/util/virnetfilter.h | 159 ++++
src/util/virnftables.c | 698 ++++++++++++++
src/util/virnftables.h | 118 +++
.../{base.args => base.iptables} | 0
tests/networkxml2firewalldata/base.nftables | 256 +++++
...-linux.args => nat-default-linux.iptables} | 0
.../nat-default-linux.nftables | 248 +++++
...pv6-linux.args => nat-ipv6-linux.iptables} | 0
.../nat-ipv6-linux.nftables | 384 ++++++++
...rgs => nat-ipv6-masquerade-linux.iptables} | 0
.../nat-ipv6-masquerade-linux.nftables | 456 +++++++++
...linux.args => nat-many-ips-linux.iptables} | 0
.../nat-many-ips-linux.nftables | 472 +++++++++
...-linux.args => nat-no-dhcp-linux.iptables} | 0
.../nat-no-dhcp-linux.nftables | 384 ++++++++
...ftp-linux.args => nat-tftp-linux.iptables} | 0
.../nat-tftp-linux.nftables | 274 ++++++
...inux.args => route-default-linux.iptables} | 0
.../route-default-linux.nftables | 162 ++++
tests/networkxml2firewalltest.c | 56 +-
tests/virfirewalltest.c | 20 +-
45 files changed, 5718 insertions(+), 954 deletions(-)
create mode 100644 src/network/libvirtd_network.aug
create mode 100644 src/network/network.conf
create mode 100644 src/network/test_libvirtd_network.aug.in
create mode 100644 src/util/virnetfilter.c
create mode 100644 src/util/virnetfilter.h
create mode 100644 src/util/virnftables.c
create mode 100644 src/util/virnftables.h
rename tests/networkxml2firewalldata/{base.args => base.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/base.nftables
rename tests/networkxml2firewalldata/{nat-default-linux.args => nat-default-linux.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/nat-default-linux.nftables
rename tests/networkxml2firewalldata/{nat-ipv6-linux.args => nat-ipv6-linux.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/nat-ipv6-linux.nftables
rename tests/networkxml2firewalldata/{nat-ipv6-masquerade-linux.args => nat-ipv6-masquerade-linux.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/nat-ipv6-masquerade-linux.nftables
rename tests/networkxml2firewalldata/{nat-many-ips-linux.args => nat-many-ips-linux.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/nat-many-ips-linux.nftables
rename tests/networkxml2firewalldata/{nat-no-dhcp-linux.args => nat-no-dhcp-linux.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/nat-no-dhcp-linux.nftables
rename tests/networkxml2firewalldata/{nat-tftp-linux.args => nat-tftp-linux.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/nat-tftp-linux.nftables
rename tests/networkxml2firewalldata/{route-default-linux.args => route-default-linux.iptables} (100%)
create mode 100644 tests/networkxml2firewalldata/route-default-linux.nftables
--
2.39.2
1 year
[PATCH RFC v2 00/12] Support throttle block filters
by wucf＠linux.ibm.com
From: Chun Feng Wu <wucf(a)linux.ibm.com>
Hi,
I am thinking to leverage "throttle block filter" in QEMU to support more flexible I/O limits(e.g. tiered I/O groups), one sample provided by QEMU doc is:
https://github.com/qemu/qemu/blob/master/docs/throttle.txt
"For example, let's say that we have three different drives and we want to set I/O limits for
each one of them and an additional set of limits for the combined I/O of all three drives."
The implementation idea is to
- Define throttle groups(limit) in domain
- Define throttle filter to reference throttle group within disk
- Within domain disk, throttle filters references multiple throttle groups to form filter chain to apply multiple limits in QEMU like above sample
- Add new virsh cmds for throttle group management:
throttlegroupset Add or update a throttling group.
throttlegroupdel Delete a throttling group.
throttlegroupinfo Get a throttling group.
throttlegrouplist list all domain throttlegroups
- Update "attach-disk" to add one more option "--throttle-groups" to apply throttle filters e.g. "virsh attach-disk $VM_ID ${DISK_PATH}/vm1_disk_2.qcow2 vdd --driver qemu --subdriver qcow2 --targetbus virtio --throttle-groups limit2,limit012"
- I chose above semantics as I felt they're appropriate, if there are better ones please kindly suggest.
This patchset includes:
- Throttle group and throttle filter definition in patch 1
- New QMP processing to update and get throttle group in patch 2
- New API definition and implementation in patch 3
- QEMU driver implementation in patch 4
- Hotplug and qemuProcessLaunch flow implemenation in patch 5,6
- Domain XML schema and doc(formatdomain.rst) change in patch 7
- Tests in patch 8,9
- Virsh cmd implementation in patch 10
- Other verification implementation in patch 11, 12
v2 changes:
- fix failure caused by "check-remote_protocol" between patch 3 and patch 9 in v1
- make sure coding style is consistent about function declaration
- patch 3 in v1 is splitted into two commits: "remote: New APIs for ThrottleGroup lifecycle management" and "qemu: Implement qemu driver for throttle API"
- replace "// comment" with "/* comment */"
- avoid empty 'cleanup' labels
- use "virJSONValueObjectAdd(&limits, "P:name", value)" to avoid introducing extra helper, and check return value
- preserve spacing between blocks of code which are not related
- remove "VSH_OT_ALIAS" section for new cmds in virsh_domain.c
From QMP perspective, the sample flow works this way:
- Throttle group creation:
virsh qemu-monitor-command 1 '{"execute":"object-add", "arguments":{"qom-type":"throttle-group","id":"limit0","limits":{"iops-total":200,"iops-read":0,"iops-total-max":200,"iops-total-max-length":1}}}'
virsh qemu-monitor-command 1 '{"execute":"object-add", "arguments":{"qom-type":"throttle-group","id":"limit1","limits":{"iops-total":250,"iops-read":0,"iops-total-max":250,"iops-total-max-length":1}}}'
virsh qemu-monitor-command 1 '{"execute":"object-add", "arguments":{"qom-type":"throttle-group","id":"limit2","limits":{"iops-total":300,"iops-read":0,"iops-total-max":300,"iops-total-max-length":1}}}'
virsh qemu-monitor-command 1 '{"execute":"object-add", "arguments":{"qom-type":"throttle-group","id":"limit012","limits":{"iops-total":400,"iops-read":0,"iops-total-max":400,"iops-total-max-length":1}}}'
- Chain up filters during attaching disk to apply two filters(limit0 and limit012):
virsh qemu-monitor-command 1 '{"execute":"blockdev-add", "arguments": {"driver":"file","filename":"/virt/disks/vm1_disk_1.qcow2","node-name":"test-3-storage","auto-read-only":true,"discard":"unmap"}}'
virsh qemu-monitor-command 1 '{"execute":"blockdev-add", "arguments":{"node-name":"test-3-format","read-only":false,"driver":"qcow2","file":"test-3-storage","backing":null}}'
virsh qemu-monitor-command 1 '{"execute":"blockdev-add", "arguments":{"driver":"throttle","node-name":"libvirt-5-filter","throttle-group": "limit0","file":"test-3-format"}}'
virsh qemu-monitor-command 1 '{"execute":"blockdev-add", "arguments": {"driver":"throttle","node-name":"libvirt-6-filter","throttle-group":"limit012","file":"libvirt-5-filter"}}'
virsh qemu-monitor-command 1 '{"execute": "device_add", "arguments": {"driver":"virtio-blk-pci","scsi":false,"bus":"pci.0","addr":"0x5","drive":"libvirt-6-filter","id":"virtio-disk1"}}'
Any comments/suggestions will be appriciated!
Chun Feng Wu (10):
config: Introduce ThrottleGroup and ThrottleFilter
qemu: monitor: Add support for ThrottleGroup operations
remote: New APIs for ThrottleGroup lifecycle management
qemu: Implement qemu driver for throttle API
qemu: hotplug: Support hot attach block disk along with throttle
filters
qemu: command: Support throttle groups and filters during
qemuProcessLaunch
schema: Add new domain elements to support multiple throttle filters
test: Test throttle group lifecycle APIs
tests: Test qemuMonitorJSONGetThrottleGroup and
qemuMonitorJSONUpdateThrottleGroup
virsh: Add support for throttle group operations
Hao Ning Xin (1):
config: validate: Verify throttle group fields
Yan Xiu Wu (1):
config: validate: Use "iotune" and "throttlefilters" exclusively for
specific disk
docs/formatdomain.rst | 48 ++
include/libvirt/libvirt-domain.h | 29 +
src/conf/domain_conf.c | 386 +++++++++++++
src/conf/domain_conf.h | 54 ++
src/conf/domain_validate.c | 120 ++--
src/conf/schemas/domaincommon.rng | 164 +++++-
src/conf/virconftypes.h | 4 +
src/driver-hypervisor.h | 22 +
src/libvirt-domain.c | 190 +++++++
src/libvirt_private.syms | 9 +
src/libvirt_public.syms | 7 +
src/qemu/qemu_block.c | 131 +++++
src/qemu/qemu_block.h | 53 ++
src/qemu/qemu_command.c | 158 ++++++
src/qemu/qemu_command.h | 9 +
src/qemu/qemu_domain.c | 85 +++
src/qemu/qemu_domain.h | 15 +
src/qemu/qemu_driver.c | 529 ++++++++++++++++++
src/qemu/qemu_hotplug.c | 24 +
src/qemu/qemu_monitor.c | 34 ++
src/qemu/qemu_monitor.h | 14 +
src/qemu/qemu_monitor_json.c | 151 +++++
src/qemu/qemu_monitor_json.h | 14 +
src/remote/remote_daemon_dispatch.c | 61 ++
src/remote/remote_driver.c | 49 ++
src/remote/remote_protocol.x | 50 +-
src/remote_protocol-structs | 30 +
src/test/test_driver.c | 382 +++++++++++++
tests/qemumonitorjsontest.c | 88 +++
.../qemustatusxml2xmldata/backup-pull-in.xml | 1 +
.../blockjob-blockdev-in.xml | 1 +
.../blockjob-mirror-in.xml | 1 +
.../migration-in-params-in.xml | 1 +
.../migration-out-nbd-bitmaps-in.xml | 1 +
.../migration-out-nbd-out.xml | 1 +
.../migration-out-nbd-tls-out.xml | 1 +
.../migration-out-params-in.xml | 1 +
tests/qemustatusxml2xmldata/modern-in.xml | 1 +
tests/qemustatusxml2xmldata/upgrade-out.xml | 1 +
.../qemustatusxml2xmldata/vcpus-multi-in.xml | 1 +
tools/virsh-completer-domain.c | 64 +++
tools/virsh-completer-domain.h | 10 +
tools/virsh-domain.c | 471 ++++++++++++++++
43 files changed, 3430 insertions(+), 36 deletions(-)
--
2.34.1
1 year
[PATCH-for-9.1 v2 0/3] rdma: Remove RDMA subsystem and pvrdma device
by Philippe Mathieu-Daudé
Since v1:
- split in 3 (Thomas)
- justify gluster removal
Philippe Mathieu-Daudé (3):
hw/rdma: Remove pvrdma device and rdmacm-mux helper
migration: Remove RDMA protocol handling
block/gluster: Remove RDMA protocol handling
MAINTAINERS | 17 -
docs/about/deprecated.rst | 9 -
docs/about/removed-features.rst | 4 +
docs/devel/migration/main.rst | 6 -
docs/pvrdma.txt | 345 --
docs/rdma.txt | 420 --
docs/system/device-url-syntax.rst.inc | 4 +-
docs/system/loongarch/virt.rst | 2 +-
docs/system/qemu-block-drivers.rst.inc | 1 -
meson.build | 59 -
qapi/machine.json | 17 -
qapi/migration.json | 31 +-
qapi/qapi-schema.json | 1 -
qapi/rdma.json | 38 -
contrib/rdmacm-mux/rdmacm-mux.h | 61 -
hw/rdma/rdma_backend.h | 129 -
hw/rdma/rdma_backend_defs.h | 76 -
hw/rdma/rdma_rm.h | 97 -
hw/rdma/rdma_rm_defs.h | 146 -
hw/rdma/rdma_utils.h | 63 -
hw/rdma/trace.h | 1 -
hw/rdma/vmw/pvrdma.h | 144 -
hw/rdma/vmw/pvrdma_dev_ring.h | 46 -
hw/rdma/vmw/pvrdma_qp_ops.h | 28 -
hw/rdma/vmw/trace.h | 1 -
include/hw/rdma/rdma.h | 37 -
include/monitor/hmp.h | 1 -
.../infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h | 685 ---
.../infiniband/hw/vmw_pvrdma/pvrdma_verbs.h | 348 --
.../standard-headers/rdma/vmw_pvrdma-abi.h | 310 --
migration/migration-stats.h | 6 +-
migration/migration.h | 9 -
migration/options.h | 2 -
migration/rdma.h | 69 -
block/gluster.c | 39 -
contrib/rdmacm-mux/main.c | 831 ----
hw/core/machine-qmp-cmds.c | 32 -
hw/rdma/rdma.c | 30 -
hw/rdma/rdma_backend.c | 1401 ------
hw/rdma/rdma_rm.c | 812 ----
hw/rdma/rdma_utils.c | 126 -
hw/rdma/vmw/pvrdma_cmd.c | 815 ----
hw/rdma/vmw/pvrdma_dev_ring.c | 141 -
hw/rdma/vmw/pvrdma_main.c | 735 ---
hw/rdma/vmw/pvrdma_qp_ops.c | 298 --
migration/migration-stats.c | 5 +-
migration/migration.c | 31 -
migration/options.c | 16 -
migration/qemu-file.c | 1 -
migration/ram.c | 86 +-
migration/rdma.c | 4184 -----------------
migration/savevm.c | 2 +-
monitor/qmp-cmds.c | 1 -
Kconfig.host | 3 -
contrib/rdmacm-mux/meson.build | 7 -
hmp-commands-info.hx | 13 -
hw/Kconfig | 1 -
hw/meson.build | 1 -
hw/rdma/Kconfig | 3 -
hw/rdma/meson.build | 12 -
hw/rdma/trace-events | 31 -
hw/rdma/vmw/trace-events | 17 -
meson_options.txt | 4 -
migration/meson.build | 1 -
migration/trace-events | 68 +-
qapi/meson.build | 1 -
qemu-options.hx | 6 -
.../org.centos/stream/8/build-environment.yml | 1 -
.../ci/org.centos/stream/8/x86_64/configure | 3 -
scripts/ci/setup/build-environment.yml | 4 -
scripts/coverity-scan/run-coverity-scan | 2 +-
scripts/meson-buildoptions.sh | 6 -
scripts/update-linux-headers.sh | 27 -
tests/lcitool/projects/qemu.yml | 3 -
tests/migration/guestperf/engine.py | 4 +-
75 files changed, 20 insertions(+), 12997 deletions(-)
delete mode 100644 docs/pvrdma.txt
delete mode 100644 docs/rdma.txt
delete mode 100644 qapi/rdma.json
delete mode 100644 contrib/rdmacm-mux/rdmacm-mux.h
delete mode 100644 hw/rdma/rdma_backend.h
delete mode 100644 hw/rdma/rdma_backend_defs.h
delete mode 100644 hw/rdma/rdma_rm.h
delete mode 100644 hw/rdma/rdma_rm_defs.h
delete mode 100644 hw/rdma/rdma_utils.h
delete mode 100644 hw/rdma/trace.h
delete mode 100644 hw/rdma/vmw/pvrdma.h
delete mode 100644 hw/rdma/vmw/pvrdma_dev_ring.h
delete mode 100644 hw/rdma/vmw/pvrdma_qp_ops.h
delete mode 100644 hw/rdma/vmw/trace.h
delete mode 100644 include/hw/rdma/rdma.h
delete mode 100644 include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_dev_api.h
delete mode 100644 include/standard-headers/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
delete mode 100644 include/standard-headers/rdma/vmw_pvrdma-abi.h
delete mode 100644 migration/rdma.h
delete mode 100644 contrib/rdmacm-mux/main.c
delete mode 100644 hw/rdma/rdma.c
delete mode 100644 hw/rdma/rdma_backend.c
delete mode 100644 hw/rdma/rdma_rm.c
delete mode 100644 hw/rdma/rdma_utils.c
delete mode 100644 hw/rdma/vmw/pvrdma_cmd.c
delete mode 100644 hw/rdma/vmw/pvrdma_dev_ring.c
delete mode 100644 hw/rdma/vmw/pvrdma_main.c
delete mode 100644 hw/rdma/vmw/pvrdma_qp_ops.c
delete mode 100644 migration/rdma.c
delete mode 100644 contrib/rdmacm-mux/meson.build
delete mode 100644 hw/rdma/Kconfig
delete mode 100644 hw/rdma/meson.build
delete mode 100644 hw/rdma/trace-events
delete mode 100644 hw/rdma/vmw/trace-events
--
2.41.0
1 year
[PATCH 0/3] qemu: Use TPM 2.0 on RISC-V
by Andrea Bolognani
Andrea Bolognani (3):
tests: Add TPM coverage to default-models tests
tests: Delete some redundant test cases
qemu: Only allow TPM 2.0 for RISC-V guests
src/qemu/qemu_domain.c | 1 +
src/qemu/qemu_validate.c | 10 +--
...aarch64-tpm-wrong-model.aarch64-latest.err | 2 +-
.../aarch64-tpm.aarch64-latest.args | 34 ---------
.../aarch64-tpm.aarch64-latest.xml | 29 --------
tests/qemuxmlconfdata/aarch64-tpm.xml | 15 ----
...ault-models.aarch64-latest.abi-update.args | 3 +
...fault-models.aarch64-latest.abi-update.xml | 3 +
...64-virt-default-models.aarch64-latest.args | 3 +
...h64-virt-default-models.aarch64-latest.xml | 3 +
.../aarch64-virt-default-models.xml | 3 +
.../loongarch64-virt-default-models.xml | 1 +
...efault-models.ppc64-latest.abi-update.args | 3 +
...default-models.ppc64-latest.abi-update.xml | 4 ++
...4-pseries-default-models.ppc64-latest.args | 3 +
...64-pseries-default-models.ppc64-latest.xml | 4 ++
.../ppc64-pseries-default-models.xml | 3 +
...ault-models.riscv64-latest.abi-update.args | 3 +
...fault-models.riscv64-latest.abi-update.xml | 3 +
...64-virt-default-models.riscv64-latest.args | 3 +
...v64-virt-default-models.riscv64-latest.xml | 3 +
.../riscv64-virt-default-models.xml | 3 +
.../s390x-ccw-default-models.xml | 1 +
.../tpm-emulator-spapr.ppc64-latest.args | 45 ------------
.../tpm-emulator-spapr.ppc64-latest.xml | 1 -
tests/qemuxmlconfdata/tpm-emulator-spapr.xml | 70 -------------------
...fault-models.x86_64-latest.abi-update.args | 3 +
...efault-models.x86_64-latest.abi-update.xml | 3 +
...86_64-pc-default-models.x86_64-latest.args | 3 +
...x86_64-pc-default-models.x86_64-latest.xml | 3 +
.../x86_64-pc-default-models.xml | 3 +
...fault-models.x86_64-latest.abi-update.args | 3 +
...efault-models.x86_64-latest.abi-update.xml | 3 +
...6_64-q35-default-models.x86_64-latest.args | 3 +
...86_64-q35-default-models.x86_64-latest.xml | 3 +
.../x86_64-q35-default-models.xml | 3 +
tests/qemuxmlconftest.c | 2 -
37 files changed, 87 insertions(+), 201 deletions(-)
delete mode 100644 tests/qemuxmlconfdata/aarch64-tpm.aarch64-latest.args
delete mode 100644 tests/qemuxmlconfdata/aarch64-tpm.aarch64-latest.xml
delete mode 100644 tests/qemuxmlconfdata/aarch64-tpm.xml
delete mode 100644 tests/qemuxmlconfdata/tpm-emulator-spapr.ppc64-latest.args
delete mode 120000 tests/qemuxmlconfdata/tpm-emulator-spapr.ppc64-latest.xml
delete mode 100644 tests/qemuxmlconfdata/tpm-emulator-spapr.xml
--
2.45.1
1 year
[PATCH] qga: Remove deprecated 'blacklist' argument / config key
by Philippe Mathieu-Daudé
The 'blacklist' argument / config key are deprecated since commi
582a098e6c ("qga: Replace 'blacklist' command line and config file
options by 'block-rpcs'"), time to remove them.
Signed-off-by: Philippe Mathieu-Daudé <philmd(a)linaro.org>
---
docs/about/deprecated.rst | 18 ------------------
docs/about/removed-features.rst | 18 ++++++++++++++++++
qga/main.c | 6 ------
3 files changed, 18 insertions(+), 24 deletions(-)
diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 40585ca7d5..a32e0e2564 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -478,24 +478,6 @@ 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.
-QEMU guest agent
-----------------
-
-``--blacklist`` command line option (since 7.2)
-'''''''''''''''''''''''''''''''''''''''''''''''
-
-``--blacklist`` has been replaced by ``--block-rpcs`` (which is a better
-wording for what this option does). The short form ``-b`` still stays
-the same and thus is the preferred way for scripts that should run with
-both, older and future versions of QEMU.
-
-``blacklist`` config file option (since 7.2)
-''''''''''''''''''''''''''''''''''''''''''''
-
-The ``blacklist`` config file option has been renamed to ``block-rpcs``
-(to be in sync with the renaming of the corresponding command line
-option).
-
Migration
---------
diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index fba0cfb0b0..deca066b21 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -1129,4 +1129,22 @@ stable for some time and is now widely used.
The command line and feature set is very close to the removed
C implementation.
+QEMU guest agent
+----------------
+
+``--blacklist`` command line option (removed in 9.1)
+''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+``--blacklist`` has been replaced by ``--block-rpcs`` (which is a better
+wording for what this option does). The short form ``-b`` still stays
+the same and thus is the preferred way for scripts that should run with
+both, older and future versions of QEMU.
+
+``blacklist`` config file option (removed in 9.1)
+'''''''''''''''''''''''''''''''''''''''''''''''''
+
+The ``blacklist`` config file option has been renamed to ``block-rpcs``
+(to be in sync with the renaming of the corresponding command line
+option).
+
.. _Intel discontinuance notification: https://www.intel.com/content/www/us/en/content-details/781327/intel-is-d...
diff --git a/qga/main.c b/qga/main.c
index bdf5344584..f4d5f15bb3 100644
--- a/qga/main.c
+++ b/qga/main.c
@@ -1071,11 +1071,6 @@ static void config_load(GAConfig *config)
g_key_file_get_boolean(keyfile, "general", "retry-path", &gerr);
}
- if (g_key_file_has_key(keyfile, "general", "blacklist", NULL)) {
- g_warning("config using deprecated 'blacklist' key, should be replaced"
- " with the 'block-rpcs' key.");
- blockrpcs_key = "blacklist";
- }
if (g_key_file_has_key(keyfile, "general", blockrpcs_key, NULL)) {
config->bliststr =
g_key_file_get_string(keyfile, "general", blockrpcs_key, &gerr);
@@ -1190,7 +1185,6 @@ static void config_parse(GAConfig *config, int argc, char **argv)
{ "path", 1, NULL, 'p' },
{ "daemonize", 0, NULL, 'd' },
{ "block-rpcs", 1, NULL, 'b' },
- { "blacklist", 1, NULL, 'b' }, /* deprecated alias for 'block-rpcs' */
{ "allow-rpcs", 1, NULL, 'a' },
#ifdef _WIN32
{ "service", 1, NULL, 's' },
--
2.41.0
1 year
[PATCH 0/2] qapi: Remove deprecated events
by Philippe Mathieu-Daudé
Remove MEM_UNPLUG_ERROR and 'vcpu' field in TRACE events,
all deprecated since long enough.
Philippe Mathieu-Daudé (2):
hw/acpi: Remove the deprecated QAPI MEM_UNPLUG_ERROR event
trace: Remove deprecated 'vcpu' field from QMP trace events
docs/about/deprecated.rst | 16 ----------------
docs/about/removed-features.rst | 15 +++++++++++++++
qapi/machine.json | 28 ----------------------------
qapi/trace.json | 27 +++------------------------
hw/acpi/memory_hotplug.c | 8 --------
hw/ppc/spapr.c | 11 +----------
trace/qmp.c | 2 --
trace/trace-hmp-cmds.c | 4 ++--
8 files changed, 21 insertions(+), 90 deletions(-)
--
2.41.0
1 year
[PATCH 0/3] meson: Improve default firewall backend configuration
by Andrea Bolognani
Test pipeline: https://gitlab.com/abologna/libvirt/-/pipelines/1308917840
See 1/3 for details.
Andrea Bolognani (3):
meson: Improve default firewall backend configuration
meson: Include firewall backend selection in summary
rpm: Configure firewall backends explicitly
libvirt.spec.in | 1 +
meson.build | 21 ++++++++++++++-------
meson_options.txt | 3 +--
src/network/bridge_driver_conf.c | 6 +++++-
src/network/meson.build | 6 ++++--
src/network/network.conf.in | 13 +++++++------
6 files changed, 32 insertions(+), 18 deletions(-)
--
2.45.1
1 year
