On Fri, Jan 28, 2022 at 11:30 PM Vladislav Yaroshchuk
<yaroshchuk2...@gmail.com> wrote:
>
>
>
> пт, 21 янв. 2022 г. в 16:03, Akihiko Odaki <akihiko.od...@gmail.com>:
>>
>> On Fri, Jan 21, 2022 at 9:19 PM Vladislav Yaroshchuk
>> <yaroshchuk2...@gmail.com> wrote:
>> >
>> >
>> > чт, 20 янв. 2022 г. в 11:32, Roman Bolshakov <ro...@roolebo.dev>:
>> >>
>> >> On Thu, Jan 13, 2022 at 08:22:14PM +0300, Vladislav Yaroshchuk wrote:
>> >> > Create separate netdevs for each vmnet operating mode:
>> >> > - vmnet-host
>> >> > - vmnet-shared
>> >> > - vmnet-bridged
>> >> >
>> >>
>> >> Sure I'm late to the party but what if we add only one backend - vmnet
>> >> with default mode set to shared and all parameters are added there?
>> >>
>> >> The CLI would look more reasonable for the most typical use case:
>> >> -netdev vmnet,id=if1 -device virtio-net,netdev=if1
>> >>
>> >> That would remove duplication of options in QAPI schema (e.g. isolated
>> >> is available in all backends now, altough I'm not sure if it makes sense
>> >> for bridged mode):
>> >>
>> >> -netdev vmnet,id=if1,isolated=yes
>> >>
>> >> start-address, end-address and subnet-mask are also used by both shared
>> >> and host modes.
>> >>
>> >> Bridged netdev would lool like:
>> >>
>> >> -netdev vmnet,id=if1,mode=bridged,ifname=en1
>> >>
>> >> Checksum offloading also seems to be available for all backends from
>> >> Monterey.
>> >>
>> >> The approach might simplify integration of the changes to libvirt and
>> >> discovery of upcoming vmnet features via qapi.
>> >>
>> >
>> > I can rewrite this if it sounds more suitable to use
>> > single `vmnet` netdev instead of three different ones.
>> > We can discuss this with Markus as a QAPI reviewer.
>> > Markus, what is your opinion about single netdev?
>> >
>> > P.S. Seems we have enough time for discussion:
>> > I started fixing memory leaks found by Akihiko and
>> > met a strange deadlock on QEMU shutdown on
>> > `qemu_mutex_lock_iothread()` during careful
>> > interface destruction with added semaphore.
>> > Need to go deeper to understand what's the
>> > problem, it will take some time.
>> >
>> > Mentioned part of Akihiko's review:
>> > https://patchew.org/QEMU/20220113172219.66372-1-yaroshchuk2...@gmail.com/20220113172219.66372-4-yaroshchuk2...@gmail.com/
>>
>
> > Actually I thought it would be tricky to implement.
>
> You mean single netdev type?
I meant the semaphore causing the deadlock, but I also think
implementing the single netdev type would have a difficulty because it
would need a redundant encapsulation of the option type as Phillip
Tennen's original patch series did.
>
>> Actually I thought it would be tricky to implement. A deadlock will
>> occur in a simple implementation if vmnet_send is already queued but
>> not executed yet when destructing:
>> - vmnet_send tries to lock the iothread and waits for the destructor to
>> unlock.
>> - vmnet_stop_interface waits for vmnet_send finishing.
>>
>
> Sounds like that's what happens actually.
> With added semaphore:
> --- a/net/vmnet-common.m
> +++ b/net/vmnet-common.m
> @@ -320,13 +320,14 @@ void vmnet_cleanup_common(NetClientState *nc)
> "org.qemu.vmnet.destroy",
> DISPATCH_QUEUE_SERIAL
> );
> -
> + dispatch_semaphore_t if_destroy_sem = dispatch_semaphore_create(0);
> vmnet_stop_interface(
> s->vmnet_if,
> if_destroy_q,
> ^(vmnet_return_t status) {
> + dispatch_semaphore_signal(if_destroy_sem);
> });
> -
> + dispatch_semaphore_wait(if_destroy_sem, DISPATCH_TIME_FOREVER);
> for (int i = 0; i < VMNET_PACKETS_LIMIT; ++i) {
> g_free(s->iov_buf[i].iov_base);
> }
> --
>
> I see this thread dump on deadlock:
>
> (lldb) bt all
> * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
> * frame #0: 0x00007fff2037ebb2 libsystem_kernel.dylib`__semwait_signal + 10
> frame #1: 0x00007fff202fec1a libsystem_c.dylib`nanosleep + 196
> frame #2: 0x00007fff212c4bb8 Foundation`+[NSThread sleepForTimeInterval:]
> + 170
> frame #3: 0x0000000101ebce3a qemu-system-x86_64`-[QemuCocoaAppController
> applicationWillTerminate:](self=0x00007fa9f91a1de0,
> _cmd="applicationWillTerminate:",
> aNotification=@"NSApplicationWillTerminateNotification") at cocoa.m:1202:5
> frame #4: 0x00007fff204a00cd
> CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
> frame #5: 0x00007fff2053bb1c
> CoreFoundation`___CFXRegistrationPost_block_invoke + 49
> frame #6: 0x00007fff2053ba9a CoreFoundation`_CFXRegistrationPost + 454
> frame #7: 0x00007fff2047134e CoreFoundation`_CFXNotificationPost + 736
> frame #8: 0x00007fff211e1bb8 Foundation`-[NSNotificationCenter
> postNotificationName:object:userInfo:] + 59
> frame #9: 0x00007fff22f585b3 AppKit`-[NSApplication terminate:] + 1377
> frame #10: 0x0000000101ebcf1f qemu-system-x86_64`-[QemuCocoaAppController
> windowShouldClose:](self=0x00007fa9f91a1de0, _cmd="windowShouldClose:",
> sender=0x00007fa9f91a7810) at cocoa.m:1231:5
> frame #11: 0x00007fff230417c9 AppKit`__19-[NSWindow __close]_block_invoke
> + 153
> frame #12: 0x00007fff23041723 AppKit`-[NSWindow __close] + 284
> frame #13: 0x00007fff22ed12bb AppKit`-[NSApplication(NSResponder)
> sendAction:to:from:] + 288
> frame #14: 0x00007fff22ed115f AppKit`-[NSControl sendAction:to:] + 86
> frame #15: 0x00007fff22ed1091 AppKit`__26-[NSCell
> _sendActionFrom:]_block_invoke + 131
> frame #16: 0x00007fff22ed0f98 AppKit`-[NSCell _sendActionFrom:] + 171
> frame #17: 0x00007fff22ed0ede AppKit`-[NSButtonCell _sendActionFrom:] + 96
> frame #18: 0x00007fff22ecdfc7 AppKit`NSControlTrackMouse + 1820
> frame #19: 0x00007fff22ecd883 AppKit`-[NSCell
> trackMouse:inRect:ofView:untilMouseUp:] + 130
> frame #20: 0x00007fff22ecd74a AppKit`-[NSButtonCell
> trackMouse:inRect:ofView:untilMouseUp:] + 697
> frame #21: 0x00007fff22ecca72 AppKit`-[NSControl mouseDown:] + 722
> frame #22: 0x00007fff22ecae5e AppKit`-[NSWindow(NSEventRouting)
> _handleMouseDownEvent:isDelayedEvent:] + 4961
> frame #23: 0x00007fff22e3a648 AppKit`-[NSWindow(NSEventRouting)
> _reallySendEvent:isDelayedEvent:] + 2594
> frame #24: 0x00007fff22e39a06 AppKit`-[NSWindow(NSEventRouting)
> sendEvent:] + 347
> frame #25: 0x00007fff22e37e14 AppKit`-[NSApplication(NSEvent) sendEvent:]
> + 352
> frame #26: 0x0000000101ebec29 qemu-system-x86_64`-[QemuApplication
> sendEvent:](self=0x00007fa9f90374e0, _cmd="sendEvent:",
> event=0x00007fa9f6ef1920) at cocoa.m:1582:9
> frame #27: 0x00007fff23110be1 AppKit`-[NSApplication _handleEvent:] + 65
> frame #28: 0x00007fff22ca0c8e AppKit`-[NSApplication run] + 623
> frame #29: 0x0000000101ebef45 qemu-system-x86_64`main(argc=3,
> argv=0x00007ffeedd71a20) at cocoa.m:1947:5
> frame #30: 0x00007fff203ccf3d libdyld.dylib`start + 1
> thread #2
> frame #0: 0x00007fff2037ecde libsystem_kernel.dylib`__psynch_cvwait + 10
> frame #1: 0x00007fff203b1e49 libsystem_pthread.dylib`_pthread_cond_wait +
> 1298
> frame #2: 0x00000001026b7837
> qemu-system-x86_64`qemu_futex_wait(ev=0x0000000102e88eb8, val=4294967295) at
> qemu-thread-posix.c:386:9
> frame #3: 0x00000001026b77b0
> qemu-system-x86_64`qemu_event_wait(ev=0x0000000102e88eb8) at
> qemu-thread-posix.c:481:9
> frame #4: 0x00000001026c56be
> qemu-system-x86_64`call_rcu_thread(opaque=0x0000000000000000) at rcu.c:261:21
> frame #5: 0x00000001026b7b76
> qemu-system-x86_64`qemu_thread_start(args=0x00007fa9f9105320) at
> qemu-thread-posix.c:556:9
> frame #6: 0x00007fff203b18fc libsystem_pthread.dylib`_pthread_start + 224
> frame #7: 0x00007fff203ad443 libsystem_pthread.dylib`thread_start + 15
> thread #3
> frame #0: 0x00007fff2037c2f6 libsystem_kernel.dylib`semaphore_wait_trap +
> 10
> frame #1: 0x00007fff20207c9b libdispatch.dylib`_dispatch_sema4_wait + 16
> frame #2: 0x00007fff2020816d
> libdispatch.dylib`_dispatch_semaphore_wait_slow + 98
> frame #3: 0x0000000101f6ac1b
> qemu-system-x86_64`vmnet_cleanup_common(nc=0x00007fa9f7019400) at
> vmnet-common.m:330:5
> frame #4: 0x0000000101f5c6cd
> qemu-system-x86_64`qemu_cleanup_net_client(nc=0x00007fa9f7019400) at
> net.c:361:9
> frame #5: 0x0000000101f5c4cf
> qemu-system-x86_64`qemu_del_net_client(nc=0x00007fa9f7019400) at net.c:417:13
> frame #6: 0x0000000101f5e751 qemu-system-x86_64`net_cleanup at
> net.c:1447:13
> frame #7: 0x000000010228f548 qemu-system-x86_64`qemu_cleanup at
> runstate.c:820:5
> frame #8: 0x0000000101e9950d qemu-system-x86_64`qemu_main(argc=3,
> argv=0x00007ffeedd71a20, envp=0x00007ffeedd71a40) at main.c:51:5
> frame #9: 0x0000000101ebefb4
> qemu-system-x86_64`call_qemu_main(opaque=0x0000000000000000) at
> cocoa.m:1897:14
> frame #10: 0x00000001026b7b76
> qemu-system-x86_64`qemu_thread_start(args=0x00007fa9f9105320) at
> qemu-thread-posix.c:556:9
> frame #11: 0x00007fff203b18fc libsystem_pthread.dylib`_pthread_start + 224
> frame #12: 0x00007fff203ad443 libsystem_pthread.dylib`thread_start + 15
> thread #4
> frame #0: 0x00007fff20384e22 libsystem_kernel.dylib`__sigwait + 10
> frame #1: 0x00007fff203b1fff libsystem_pthread.dylib`sigwait + 29
> frame #2: 0x00000001026b3541
> qemu-system-x86_64`sigwait_compat(opaque=0x00007fa9f6d0a3f0) at
> compatfd.c:36:15
> frame #3: 0x00000001026b7b76
> qemu-system-x86_64`qemu_thread_start(args=0x00007fa9f6d09ec0) at
> qemu-thread-posix.c:556:9
> frame #4: 0x00007fff203b18fc libsystem_pthread.dylib`_pthread_start + 224
> frame #5: 0x00007fff203ad443 libsystem_pthread.dylib`thread_start + 15
> thread #7
> frame #0: 0x00007fff2037e4ca libsystem_kernel.dylib`__psynch_mutexwait +
> 10
> frame #1: 0x00007fff203af2ab
> libsystem_pthread.dylib`_pthread_mutex_firstfit_lock_wait + 76
> frame #2: 0x00007fff203ad192
> libsystem_pthread.dylib`_pthread_mutex_firstfit_lock_slow + 204
> frame #3: 0x00007fff203b1ee1 libsystem_pthread.dylib`_pthread_cond_wait +
> 1450
> frame #4: 0x00000001026b6d92
> qemu-system-x86_64`qemu_cond_wait_impl(cond=0x00007fa9f6c2edf0,
> mutex=0x0000000102e758f0, file="../softmmu/cpus.c", line=423) at
> qemu-thread-posix.c:195:11
> frame #5: 0x000000010227c716
> qemu-system-x86_64`qemu_wait_io_event(cpu=0x00007fa9f949a000) at cpus.c:423:9
> frame #6: 0x000000010239c94e
> qemu-system-x86_64`mttcg_cpu_thread_fn(arg=0x00007fa9f949a000) at
> tcg-accel-ops-mttcg.c:123:9
> frame #7: 0x00000001026b7b76
> qemu-system-x86_64`qemu_thread_start(args=0x00007fa9f6c2f5e0) at
> qemu-thread-posix.c:556:9
> frame #8: 0x00007fff203b18fc libsystem_pthread.dylib`_pthread_start + 224
> frame #9: 0x00007fff203ad443 libsystem_pthread.dylib`thread_start + 15
> thread #8
> frame #0: 0x00007fff2037d95e libsystem_kernel.dylib`__workq_kernreturn +
> 10
> frame #1: 0x00007fff203ae4c1 libsystem_pthread.dylib`_pthread_wqthread +
> 414
> frame #2: 0x00007fff203ad42f libsystem_pthread.dylib`start_wqthread + 15
> thread #9, queue = 'org.qemu.vmnet.if_queue'
> frame #0: 0x00007fff2037e4ca libsystem_kernel.dylib`__psynch_mutexwait +
> 10
> frame #1: 0x00007fff203af2ab
> libsystem_pthread.dylib`_pthread_mutex_firstfit_lock_wait + 76
> frame #2: 0x00007fff203ad192
> libsystem_pthread.dylib`_pthread_mutex_firstfit_lock_slow + 204
> frame #3: 0x00000001026b67ea
> qemu-system-x86_64`qemu_mutex_lock_impl(mutex=0x0000000102e758f0,
> file="../net/vmnet-common.m", line=91) at qemu-thread-posix.c:80:11
> frame #4: 0x000000010227c9d2
> qemu-system-x86_64`qemu_mutex_lock_iothread_impl(file="../net/vmnet-common.m",
> line=91) at cpus.c:497:5
> frame #5: 0x0000000101f6ae9e
> qemu-system-x86_64`vmnet_send(nc=0x00007fa9f7019400,
> event_id=VMNET_INTERFACE_PACKETS_AVAILABLE, event=0x00007fa9f6d3b860) at
> vmnet-common.m:91:5
> frame #6: 0x0000000101f6acf3
> qemu-system-x86_64`__vmnet_register_event_callback_block_invoke(.block_descriptor=0x00007fa9f9034240,
> event_id=VMNET_INTERFACE_PACKETS_AVAILABLE, event=0x00007fa9f6d3b860) at
> vmnet-common.m:121:15
> frame #7: 0x00007fff6f385a3d
> vmnet`__vmnet_interface_set_event_callback_block_invoke_3 + 195
> frame #8: 0x00007fff20207806 libdispatch.dylib`_dispatch_client_callout +
> 8
> frame #9: 0x00007fff2020a1b0 libdispatch.dylib`_dispatch_continuation_pop
> + 423
> frame #10: 0x00007fff2021a564 libdispatch.dylib`_dispatch_source_invoke +
> 2061
> frame #11: 0x00007fff2020d493
> libdispatch.dylib`_dispatch_lane_serial_drain + 263
> frame #12: 0x00007fff2020e0ad libdispatch.dylib`_dispatch_lane_invoke +
> 366
> frame #13: 0x00007fff20217c0d
> libdispatch.dylib`_dispatch_workloop_worker_thread + 811
> frame #14: 0x00007fff203ae45d libsystem_pthread.dylib`_pthread_wqthread +
> 314
> frame #15: 0x00007fff203ad42f libsystem_pthread.dylib`start_wqthread + 15
> thread #11, name = 'com.apple.NSEventThread'
> frame #0: 0x00007fff2037c2ba libsystem_kernel.dylib`mach_msg_trap + 10
> frame #1: 0x00007fff2037c62c libsystem_kernel.dylib`mach_msg + 60
> frame #2: 0x00007fff204aab2f CoreFoundation`__CFRunLoopServiceMachPort +
> 316
> frame #3: 0x00007fff204a920f CoreFoundation`__CFRunLoopRun + 1328
> frame #4: 0x00007fff204a861c CoreFoundation`CFRunLoopRunSpecific + 563
> frame #5: 0x00007fff22e3623a AppKit`_NSEventThread + 124
> frame #6: 0x00007fff203b18fc libsystem_pthread.dylib`_pthread_start + 224
> frame #7: 0x00007fff203ad443 libsystem_pthread.dylib`thread_start + 15
>
>> Though I doubt it is the cause of your deadlock. This deadlock would
>> not happen frequently since vmnet_send will not be queued if the
>> device is not used.
>>
>
> Having two-three connected nics causes deadlock almost every
> time. With only one nic it happens one time out of two or three.
>
> An interesting thing is that using qemu_send_packet() instead
> of qemu_send_packet_async() fixes the problem. Hope to
> start investigating this next week.
A proper fix is to add a flag to tell if it is being destroyed and
code to check it and then lock iothread in a critical section.
Looking at qemu_send_packet_async, I found some other problems.
send_enabled is accessed by both a dispatch queue thread and an
iothread but not protected for multi-thread use.
Another problem is that VMNET_INTERFACE_PACKETS_AVAILABLE is silently
ignored when send_enabled is not set. It should call vmnet_read after
setting send_enabled.
Finally, vmnet_send clamps pkt_cnt, but the remaining available
packets should also be read.
Regards,
Akihiko Odaki
>
>> Regards,
>> Akihiko Odaki
>>
>> >
>> >
>> >> Thanks,
>> >> Roman
>> >>
>> >> > Signed-off-by: Vladislav Yaroshchuk <yaroshchuk2...@gmail.com>
>> >> > ---
>> >> > net/clients.h | 11 ++++
>> >> > net/meson.build | 7 +++
>> >> > net/net.c | 10 ++++
>> >> > net/vmnet-bridged.m | 25 +++++++++
>> >> > net/vmnet-common.m | 20 +++++++
>> >> > net/vmnet-host.c | 24 ++++++++
>> >> > net/vmnet-shared.c | 25 +++++++++
>> >> > net/vmnet_int.h | 25 +++++++++
>> >> > qapi/net.json | 133 +++++++++++++++++++++++++++++++++++++++++++-
>> >> > 9 files changed, 278 insertions(+), 2 deletions(-)
>> >> > create mode 100644 net/vmnet-bridged.m
>> >> > create mode 100644 net/vmnet-common.m
>> >> > create mode 100644 net/vmnet-host.c
>> >> > create mode 100644 net/vmnet-shared.c
>> >> > create mode 100644 net/vmnet_int.h
>> >> >
>> >> > diff --git a/net/net.c b/net/net.c
>> >> > index f0d14dbfc1..1dbb64b935 100644
>> >> > --- a/net/net.c
>> >> > +++ b/net/net.c
>> >> > @@ -1021,6 +1021,11 @@ static int (* const
>> >> > net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
>> >> > #ifdef CONFIG_L2TPV3
>> >> > [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3,
>> >> > #endif
>> >> > +#ifdef CONFIG_VMNET
>> >> > + [NET_CLIENT_DRIVER_VMNET_HOST] = net_init_vmnet_host,
>> >> > + [NET_CLIENT_DRIVER_VMNET_SHARED] = net_init_vmnet_shared,
>> >> > + [NET_CLIENT_DRIVER_VMNET_BRIDGED] = net_init_vmnet_bridged,
>> >> > +#endif /* CONFIG_VMNET */
>> >> > };
>> >> >
>> >> >
>> >> > @@ -1106,6 +1111,11 @@ void show_netdevs(void)
>> >> > #endif
>> >> > #ifdef CONFIG_VHOST_VDPA
>> >> > "vhost-vdpa",
>> >> > +#endif
>> >> > +#ifdef CONFIG_VMNET
>> >> > + "vmnet-host",
>> >> > + "vmnet-shared",
>> >> > + "vmnet-bridged",
>> >> > #endif
>> >> > };
>> >> >
>> >> > diff --git a/net/vmnet-bridged.m b/net/vmnet-bridged.m
>> >> > new file mode 100644
>> >> > index 0000000000..4e42a90391
>> >> > --- /dev/null
>> >> > +++ b/net/vmnet-bridged.m
>> >> > @@ -0,0 +1,25 @@
>> >> > +/*
>> >> > + * vmnet-bridged.m
>> >> > + *
>> >> > + * Copyright(c) 2021 Vladislav Yaroshchuk <yaroshchuk2...@gmail.com>
>> >> > + *
>> >> > + * This work is licensed under the terms of the GNU GPL, version 2 or
>> >> > later.
>> >> > + * See the COPYING file in the top-level directory.
>> >> > + *
>> >> > + */
>> >> > +
>> >> > +#include "qemu/osdep.h"
>> >> > +#include "qapi/qapi-types-net.h"
>> >> > +#include "vmnet_int.h"
>> >> > +#include "clients.h"
>> >> > +#include "qemu/error-report.h"
>> >> > +#include "qapi/error.h"
>> >> > +
>> >> > +#include <vmnet/vmnet.h>
>> >> > +
>> >> > +int net_init_vmnet_bridged(const Netdev *netdev, const char *name,
>> >> > + NetClientState *peer, Error **errp)
>> >> > +{
>> >> > + error_setg(errp, "vmnet-bridged is not implemented yet");
>> >> > + return -1;
>> >> > +}
>> >> > diff --git a/net/vmnet-common.m b/net/vmnet-common.m
>> >> > new file mode 100644
>> >> > index 0000000000..532d152840
>> >> > --- /dev/null
>> >> > +++ b/net/vmnet-common.m
>> >> > @@ -0,0 +1,20 @@
>> >> > +/*
>> >> > + * vmnet-common.m - network client wrapper for Apple vmnet.framework
>> >> > + *
>> >> > + * Copyright(c) 2021 Vladislav Yaroshchuk <yaroshchuk2...@gmail.com>
>> >> > + * Copyright(c) 2021 Phillip Tennen <phil...@axleos.com>
>> >> > + *
>> >> > + * This work is licensed under the terms of the GNU GPL, version 2 or
>> >> > later.
>> >> > + * See the COPYING file in the top-level directory.
>> >> > + *
>> >> > + */
>> >> > +
>> >> > +#include "qemu/osdep.h"
>> >> > +#include "qapi/qapi-types-net.h"
>> >> > +#include "vmnet_int.h"
>> >> > +#include "clients.h"
>> >> > +#include "qemu/error-report.h"
>> >> > +#include "qapi/error.h"
>> >> > +
>> >> > +#include <vmnet/vmnet.h>
>> >> > +
>> >> > diff --git a/net/vmnet-host.c b/net/vmnet-host.c
>> >> > new file mode 100644
>> >> > index 0000000000..4a5ef99dc7
>> >> > --- /dev/null
>> >> > +++ b/net/vmnet-host.c
>> >> > @@ -0,0 +1,24 @@
>> >> > +/*
>> >> > + * vmnet-host.c
>> >> > + *
>> >> > + * Copyright(c) 2021 Vladislav Yaroshchuk <yaroshchuk2...@gmail.com>
>> >> > + *
>> >> > + * This work is licensed under the terms of the GNU GPL, version 2 or
>> >> > later.
>> >> > + * See the COPYING file in the top-level directory.
>> >> > + *
>> >> > + */
>> >> > +
>> >> > +#include "qemu/osdep.h"
>> >> > +#include "qapi/qapi-types-net.h"
>> >> > +#include "vmnet_int.h"
>> >> > +#include "clients.h"
>> >> > +#include "qemu/error-report.h"
>> >> > +#include "qapi/error.h"
>> >> > +
>> >> > +#include <vmnet/vmnet.h>
>> >> > +
>> >> > +int net_init_vmnet_host(const Netdev *netdev, const char *name,
>> >> > + NetClientState *peer, Error **errp) {
>> >> > + error_setg(errp, "vmnet-host is not implemented yet");
>> >> > + return -1;
>> >> > +}
>> >> > diff --git a/net/vmnet-shared.c b/net/vmnet-shared.c
>> >> > new file mode 100644
>> >> > index 0000000000..f8c4a4f3b8
>> >> > --- /dev/null
>> >> > +++ b/net/vmnet-shared.c
>> >> > @@ -0,0 +1,25 @@
>> >> > +/*
>> >> > + * vmnet-shared.c
>> >> > + *
>> >> > + * Copyright(c) 2021 Vladislav Yaroshchuk <yaroshchuk2...@gmail.com>
>> >> > + *
>> >> > + * This work is licensed under the terms of the GNU GPL, version 2 or
>> >> > later.
>> >> > + * See the COPYING file in the top-level directory.
>> >> > + *
>> >> > + */
>> >> > +
>> >> > +#include "qemu/osdep.h"
>> >> > +#include "qapi/qapi-types-net.h"
>> >> > +#include "vmnet_int.h"
>> >> > +#include "clients.h"
>> >> > +#include "qemu/error-report.h"
>> >> > +#include "qapi/error.h"
>> >> > +
>> >> > +#include <vmnet/vmnet.h>
>> >> > +
>> >> > +int net_init_vmnet_shared(const Netdev *netdev, const char *name,
>> >> > + NetClientState *peer, Error **errp)
>> >> > +{
>> >> > + error_setg(errp, "vmnet-shared is not implemented yet");
>> >> > + return -1;
>> >> > +}
>> >> > diff --git a/net/vmnet_int.h b/net/vmnet_int.h
>> >> > new file mode 100644
>> >> > index 0000000000..c5982259a4
>> >> > --- /dev/null
>> >> > +++ b/net/vmnet_int.h
>> >> > @@ -0,0 +1,25 @@
>> >> > +/*
>> >> > + * vmnet_int.h
>> >> > + *
>> >> > + * Copyright(c) 2021 Vladislav Yaroshchuk <yaroshchuk2...@gmail.com>
>> >> > + *
>> >> > + * This work is licensed under the terms of the GNU GPL, version 2 or
>> >> > later.
>> >> > + * See the COPYING file in the top-level directory.
>> >> > + *
>> >> > + */
>> >> > +#ifndef VMNET_INT_H
>> >> > +#define VMNET_INT_H
>> >> > +
>> >> > +#include "qemu/osdep.h"
>> >> > +#include "vmnet_int.h"
>> >> > +#include "clients.h"
>> >> > +
>> >> > +#include <vmnet/vmnet.h>
>> >> > +
>> >> > +typedef struct VmnetCommonState {
>> >> > + NetClientState nc;
>> >> > +
>> >> > +} VmnetCommonState;
>> >> > +
>> >> > +
>> >> > +#endif /* VMNET_INT_H */
>> >> > diff --git a/qapi/net.json b/qapi/net.json
>> >> > index 7fab2e7cd8..b922e2e34f 100644
>> >> > --- a/qapi/net.json
>> >> > +++ b/qapi/net.json
>> >> > @@ -452,6 +452,120 @@
>> >> > '*vhostdev': 'str',
>> >> > '*queues': 'int' } }
>> >> >
>> >> > +##
>> >> > +# @NetdevVmnetHostOptions:
>> >> > +#
>> >> > +# vmnet (host mode) network backend.
>> >> > +#
>> >> > +# Allows the vmnet interface to communicate with other vmnet
>> >> > +# interfaces that are in host mode and also with the host.
>> >> > +#
>> >> > +# @start-address: The starting IPv4 address to use for the interface.
>> >> > +# Must be in the private IP range (RFC 1918). Must be
>> >> > +# specified along with @end-address and @subnet-mask.
>> >> > +# This address is used as the gateway address. The
>> >> > +# subsequent address up to and including end-address
>> >> > are
>> >> > +# placed in the DHCP pool.
>> >> > +#
>> >> > +# @end-address: The DHCP IPv4 range end address to use for the
>> >> > +# interface. Must be in the private IP range (RFC 1918).
>> >> > +# Must be specified along with @start-address and
>> >> > +# @subnet-mask.
>> >> > +#
>> >> > +# @subnet-mask: The IPv4 subnet mask to use on the interface. Must
>> >> > +# be specified along with @start-address and
>> >> > @subnet-mask.
>> >> > +#
>> >> > +# @isolated: Enable isolation for this interface. Interface isolation
>> >> > +# ensures that vmnet interface is not able to communicate
>> >> > +# with any other vmnet interfaces. Only communication with
>> >> > +# host is allowed. Available since macOS Big Sur 11.0.
>> >> > +#
>> >> > +# @net-uuid: The identifier (UUID) to uniquely identify the isolated
>> >> > +# network vmnet interface should be added to. If
>> >> > +# set, no DHCP service is provided for this interface and
>> >> > +# network communication is allowed only with other
>> >> > interfaces
>> >> > +# added to this network identified by the UUID. Available
>> >> > +# since macOS Big Sur 11.0.
>> >> > +#
>> >> > +# Since: 7.0
>> >> > +##
>> >> > +{ 'struct': 'NetdevVmnetHostOptions',
>> >> > + 'data': {
>> >> > + '*start-address': 'str',
>> >> > + '*end-address': 'str',
>> >> > + '*subnet-mask': 'str',
>> >> > + '*isolated': 'bool',
>> >> > + '*net-uuid': 'str' },
>> >> > + 'if': 'CONFIG_VMNET' }
>> >> > +
>> >> > +##
>> >> > +# @NetdevVmnetSharedOptions:
>> >> > +#
>> >> > +# vmnet (shared mode) network backend.
>> >> > +#
>> >> > +# Allows traffic originating from the vmnet interface to reach the
>> >> > +# Internet through a network address translator (NAT).
>> >> > +# The vmnet interface can communicate with the host and with
>> >> > +# other shared mode interfaces on the same subnet. If no DHCP
>> >> > +# settings, subnet mask and IPv6 prefix specified, the interface can
>> >> > +# communicate with any of other interfaces in shared mode.
>> >> > +#
>> >> > +# @start-address: The starting IPv4 address to use for the interface.
>> >> > +# Must be in the private IP range (RFC 1918). Must be
>> >> > +# specified along with @end-address and @subnet-mask.
>> >> > +# This address is used as the gateway address. The
>> >> > +# subsequent address up to and including end-address
>> >> > are
>> >> > +# placed in the DHCP pool.
>> >> > +#
>> >> > +# @end-address: The DHCP IPv4 range end address to use for the
>> >> > +# interface. Must be in the private IP range (RFC 1918).
>> >> > +# Must be specified along with @start-address and
>> >> > @subnet-mask.
>> >> > +#
>> >> > +# @subnet-mask: The IPv4 subnet mask to use on the interface. Must
>> >> > +# be specified along with @start-address and
>> >> > @subnet-mask.
>> >> > +#
>> >> > +# @isolated: Enable isolation for this interface. Interface isolation
>> >> > +# ensures that vmnet interface is not able to communicate
>> >> > +# with any other vmnet interfaces. Only communication with
>> >> > +# host is allowed. Available since macOS Big Sur 11.0.
>> >> > +#
>> >> > +# @nat66-prefix: The IPv6 prefix to use into guest network. Must be a
>> >> > +# unique local address i.e. start with fd00::/8 and have
>> >> > +# length of 64.
>> >> > +#
>> >> > +# Since: 7.0
>> >> > +##
>> >> > +{ 'struct': 'NetdevVmnetSharedOptions',
>> >> > + 'data': {
>> >> > + '*start-address': 'str',
>> >> > + '*end-address': 'str',
>> >> > + '*subnet-mask': 'str',
>> >> > + '*isolated': 'bool',
>> >> > + '*nat66-prefix': 'str' },
>> >> > + 'if': 'CONFIG_VMNET' }
>> >> > +
>> >> > +##
>> >> > +# @NetdevVmnetBridgedOptions:
>> >> > +#
>> >> > +# vmnet (bridged mode) network backend.
>> >> > +#
>> >> > +# Bridges the vmnet interface with a physical network interface.
>> >> > +#
>> >> > +# @ifname: The name of the physical interface to be bridged.
>> >> > +#
>> >> > +# @isolated: Enable isolation for this interface. Interface isolation
>> >> > +# ensures that vmnet interface is not able to communicate
>> >> > +# with any other vmnet interfaces. Only communication with
>> >> > +# host is allowed. Available since macOS Big Sur 11.0.
>> >> > +#
>> >> > +# Since: 7.0
>> >> > +##
>> >> > +{ 'struct': 'NetdevVmnetBridgedOptions',
>> >> > + 'data': {
>> >> > + 'ifname': 'str',
>> >> > + '*isolated': 'bool' },
>> >> > + 'if': 'CONFIG_VMNET' }
>> >> > +
>> >> > ##
>> >> > # @NetClientDriver:
>> >> > #
>> >> > @@ -460,10 +574,16 @@
>> >> > # Since: 2.7
>> >> > #
>> >> > # @vhost-vdpa since 5.1
>> >> > +# @vmnet-host since 7.0
>> >> > +# @vmnet-shared since 7.0
>> >> > +# @vmnet-bridged since 7.0
>> >> > ##
>> >> > { 'enum': 'NetClientDriver',
>> >> > 'data': [ 'none', 'nic', 'user', 'tap', 'l2tpv3', 'socket', 'vde',
>> >> > - 'bridge', 'hubport', 'netmap', 'vhost-user', 'vhost-vdpa'
>> >> > ] }
>> >> > + 'bridge', 'hubport', 'netmap', 'vhost-user', 'vhost-vdpa',
>> >> > + { 'name': 'vmnet-host', 'if': 'CONFIG_VMNET' },
>> >> > + { 'name': 'vmnet-shared', 'if': 'CONFIG_VMNET' },
>> >> > + { 'name': 'vmnet-bridged', 'if': 'CONFIG_VMNET' }] }
>> >> >
>> >> > ##
>> >> > # @Netdev:
>> >> > @@ -477,6 +597,9 @@
>> >> > # Since: 1.2
>> >> > #
>> >> > # 'l2tpv3' - since 2.1
>> >> > +# 'vmnet-host' - since 7.0
>> >> > +# 'vmnet-shared' - since 7.0
>> >> > +# 'vmnet-bridged' - since 7.0
>> >> > ##
>> >> > { 'union': 'Netdev',
>> >> > 'base': { 'id': 'str', 'type': 'NetClientDriver' },
>> >> > @@ -492,7 +615,13 @@
>> >> > 'hubport': 'NetdevHubPortOptions',
>> >> > 'netmap': 'NetdevNetmapOptions',
>> >> > 'vhost-user': 'NetdevVhostUserOptions',
>> >> > - 'vhost-vdpa': 'NetdevVhostVDPAOptions' } }
>> >> > + 'vhost-vdpa': 'NetdevVhostVDPAOptions',
>> >> > + 'vmnet-host': { 'type': 'NetdevVmnetHostOptions',
>> >> > + 'if': 'CONFIG_VMNET' },
>> >> > + 'vmnet-shared': { 'type': 'NetdevVmnetSharedOptions',
>> >> > + 'if': 'CONFIG_VMNET' },
>> >> > + 'vmnet-bridged': { 'type': 'NetdevVmnetBridgedOptions',
>> >> > + 'if': 'CONFIG_VMNET' } } }
>> >> >
>> >> > ##
>> >> > # @RxState:
>> >> > --
>> >> > 2.23.0
>> >> >
>> >
>> >
>> >
>> > --
>> > Best Regards,
>> >
>> > Vladislav Yaroshchuk
>
>
>
> --
> Best Regards,
>
> Vladislav Yaroshchuk
