- 27 9月, 2016 27 次提交
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由 Paolo Bonzini 提交于
This uses the wrong frame size for packets composed of multiple descriptors. Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Prasad J Pandit 提交于
ColdFire Fast Ethernet Controller uses buffer descriptors to manage data flow to/fro receive & transmit queues. While transmitting packets, it could continue to read buffer descriptors if a buffer descriptor has length of zero and has crafted values in bd.flags. Set upper limit to number of buffer descriptors. Reported-by: NLi Qiang <liqiang6-s@360.cn> Signed-off-by: NPrasad J Pandit <pjp@fedoraproject.org> Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Dmitry Fleytman 提交于
This patch fixes 2 issues: 1. Bits set in EIAC register should be cleared from IMS when EIAM is not used. 2. Only bit that corresonds to the interrupt being raised should be cleared. See spec. 10.2.4.7 Interrupt Auto Clear Signed-off-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Dmitry Fleytman 提交于
Do not raise ACK interrupts when RFCTL.ACKDIS bit is set (see spec. 10.2.5.16). Signed-off-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Dmitry Fleytman 提交于
Interrupt mask for legacy OTHER causes should not apply to MSI-X OTHER cause. Signed-off-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Dmitry Fleytman 提交于
This patch fixes incorrect check for interrypt type being used. PBSCLR register is valid for MSI-X only. See spec. 10.2.3.13 MSI—X PBA Clear Signed-off-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Dmitry Fleytman 提交于
CTRL_EXT.EIAME bit controls clearing of IAM bits, but current code clears IMS bits instead. See spec. 10.2.2.5 Extended Device Control Register. Signed-off-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Dmitry Fleytman 提交于
Signed-off-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Dmitry Fleytman 提交于
Before this patch first netdev queue only was flushed. Signed-off-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Peter Lieven 提交于
we only need to allocate enough memory to hold the packet. This might be less than NET_BUFSIZE. Additionally fail early if the packet is larger than NET_BUFSIZE. Signed-off-by: NPeter Lieven <pl@kamp.de> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Alexey Kardashevskiy 提交于
The tap backend is already using qemu-bridge-helper to attach tap interface to a bridge but (unlike the bridge backend) it always uses the default bridge name - br0. This adds a "br" property support to the tap backend. Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: NGreg Kurz <groug@kaod.org> Tested-by: NGreg Kurz <groug@kaod.org> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Gonglei 提交于
hw/net/e1000e_core.c:56: warning: e1000e_set_interrupt_cause declared inline after being called hw/net/e1000e_core.c:56: warning: previous declaration of e1000e_set_interrupt_cause was here Signed-off-by: NGonglei <arei.gonglei@huawei.com> Reviewed-by: NDmitry Fleytman <dmitry@daynix.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
Introduce the design of COLO-proxy, and how to use it. Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
add Zhang Chen and Li zhijian as co-maintainers of COLO-proxy. Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
We will rewrite tcp packet secondary received and sent. When colo guest is a tcp server. Firstly, client start a tcp handshake. the packet's seq=client_seq, ack=0,flag=SYN. COLO primary guest get this pkt and mirror(filter-mirror) to secondary guest, secondary get it use filter-redirector. Then,primary guest response pkt (seq=primary_seq,ack=client_seq+1,flag=ACK|SYN). secondary guest response pkt (seq=secondary_seq,ack=client_seq+1,flag=ACK|SYN). In here,we use filter-rewriter save the secondary_seq to it's tcp connection. Finally handshake,client send pkt (seq=client_seq+1,ack=primary_seq+1,flag=ACK). Here,filter-rewriter can get primary_seq, and rewrite ack from primary_seq+1 to secondary_seq+1, recalculate checksum. So the secondary tcp connection kept good. When we send/recv packet. client send pkt(seq=client_seq+1+data_len,ack=primary_seq+1,flag=ACK|PSH). filter-rewriter rewrite ack and send to secondary guest. primary guest response pkt (seq=primary_seq+1,ack=client_seq+1+data_len,flag=ACK) secondary guest response pkt (seq=secondary_seq+1,ack=client_seq+1+data_len,flag=ACK) we rewrite secondary guest seq from secondary_seq+1 to primary_seq+1. So tcp connection kept good. In code We use offset( = secondary_seq - primary_seq ) to rewrite seq or ack. handle_primary_tcp_pkt: tcp_pkt->th_ack += offset; handle_secondary_tcp_pkt: tcp_pkt->th_seq -= offset; Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
We use net/colo.h to track connection and parse packet Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
Filter-rewriter is a part of COLO project. It will rewrite some of secondary packet to make secondary guest's tcp connection established successfully. In this module we will rewrite tcp packet's ack to the secondary from primary,and rewrite tcp packet's seq to the primary from secondary. usage: colo secondary: -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 -object filter-rewriter,id=rew0,netdev=hn0,queue=all Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
We add TCP,UDP,ICMP packet comparison to replace IP packet comparison. This can increase the accuracy of the package comparison. Less checkpoint more efficiency. Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
If primary packet is same with secondary packet, we will send primary packet and drop secondary packet, otherwise notify COLO frame to do checkpoint. If primary packet comes but secondary packet does not, after REGULAR_PACKET_CHECK_MS milliseconds we set the primary packet as old_packet,then do a checkpoint. Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
In this patch we use kernel jhash table to track connection, and then enqueue net packet like this: + CompareState ++ | | +---------------+ +---------------+ +---------------+ |conn list +--->conn +--------->conn | +---------------+ +---------------+ +---------------+ | | | | | | +---------------+ +---v----+ +---v----+ +---v----+ +---v----+ |primary | |secondary |primary | |secondary |packet | |packet + |packet | |packet + +--------+ +--------+ +--------+ +--------+ | | | | +---v----+ +---v----+ +---v----+ +---v----+ |primary | |secondary |primary | |secondary |packet | |packet + |packet | |packet + +--------+ +--------+ +--------+ +--------+ | | | | +---v----+ +---v----+ +---v----+ +---v----+ |primary | |secondary |primary | |secondary |packet | |packet + |packet | |packet + +--------+ +--------+ +--------+ +--------+ We use conn_list to record connection info. When we want to enqueue a packet, firstly get the connection from connection_track_table. then push the packet to g_queue(pri/sec) in it's own conn. Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
Jhash will be used by colo-compare and filter-rewriter to save and lookup net connection info Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
The net/colo.c is used by colo-compare and filter-rewriter. this can share common data structure like net packet, and other functions. Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
This a COLO net ascii figure: Primary qemu Secondary qemu +--------------------------------------------------------------+ +----------------------------------------------------------------+ | +----------------------------------------------------------+ | | +-----------------------------------------------------------+ | | | | | | | | | | | guest | | | | guest | | | | | | | | | | | +-------^--------------------------+-----------------------+ | | +---------------------+--------+----------------------------+ | | | | | | ^ | | | | | | | | | | | | +------------------------------------------------------+ | | | | |netfilter| | | | | | netfilter | | | | +----------+ +----------------------------+ | | | +-----------------------------------------------------------+ | | | | | | | out | | | | | | filter excute order | | | | | | +-----------------------------+ | | | | | | +-------------------> | | | | | | | | | | | | | | | | TCP | | | | +-----+--+-+ +-----v----+ +-----v----+ |pri +----+----+sec| | | | +------------+ +---+----+---v+rewriter++ +------------+ | | | | | | | | | | |in | |in | | | | | | | | | | | | | | | | filter | | filter | | filter +------> colo <------+ +--------> filter +--> adjust | adjust +--> filter | | | | | | mirror | |redirector| |redirector| | | compare | | | | | | redirector | | ack | seq | | redirector | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +----^-----+ +----+-----+ +----------+ | +---------+ | | | | +------------+ +--------+--------------+ +---+--------+ | | | | | tx | rx rx | | | | | tx all | rx | | | | | | | | | | +-----------------------------------------------------------+ | | | | +--------------+ | | | | | | | | | filter excute order | | | | | | | | | | +----------------> | | | +--------------------------------------------------------+ | | +-----------------------------------------+ | | | | | | | | | +--------------------------------------------------------------+ +----------------------------------------------------------------+ |guest receive | guest send | | +--------+----------------------------v------------------------+ | | NOTE: filter direction is rx/tx/all | tap | rx:receive packets sent to the netdev | | tx:receive packets sent by the netdev +--------------------------------------------------------------+ In COLO-compare, we do packet comparing job. Packets coming from the primary char indev will be sent to outdev. Packets coming from the secondary char dev will be dropped after comparing. colo-comapre need two input chardev and one output chardev: primary_in=chardev1-id (source: primary send packet) secondary_in=chardev2-id (source: secondary send packet) outdev=chardev3-id usage: primary: -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown -device e1000,id=e0,netdev=hn0,mac=52:a4:00:12:78:66 -chardev socket,id=mirror0,host=3.3.3.3,port=9003,server,nowait -chardev socket,id=compare1,host=3.3.3.3,port=9004,server,nowait -chardev socket,id=compare0,host=3.3.3.3,port=9001,server,nowait -chardev socket,id=compare0-0,host=3.3.3.3,port=9001 -chardev socket,id=compare_out,host=3.3.3.3,port=9005,server,nowait -chardev socket,id=compare_out0,host=3.3.3.3,port=9005 -object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0 -object filter-redirector,netdev=hn0,id=redire0,queue=rx,indev=compare_out -object filter-redirector,netdev=hn0,id=redire1,queue=rx,outdev=compare0 -object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0 secondary: -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,down script=/etc/qemu-ifdown -device e1000,netdev=hn0,mac=52:a4:00:12:78:66 -chardev socket,id=red0,host=3.3.3.3,port=9003 -chardev socket,id=red1,host=3.3.3.3,port=9004 -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Zhang Chen 提交于
Add qemu_chr_add_handlers_full() API, we can use this API pass in a GMainContext,make handler run in the context rather than main_loop. This comments from Daniel P . Berrange. Signed-off-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: NLi Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: NWen Congyang <wency@cn.fujitsu.com> Reviewed-by: NDaniel P. Berrange <berrange@redhat.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Shmulik Ladkani 提交于
Upon hmp_host_net_remove(), the appropriate -net client is deleted (according to the given vlan_id and device id), as well as the corresponsing hub port. However, the relevant '-net' option that was added by former hmp_host_net_add() call is still present in "net" options group. This makes the following legit HMP sequence erroneous: (qemu) host_net_add tap id=n1,ifname=tap1,script=no,downscript=no,vlan=1 (qemu) host_net_remove 1 n1 (qemu) host_net_add tap id=n1,ifname=tap1,script=no,downscript=no,vlan=1 Duplicate ID 'n1' for net Fix, by deleting the stored '-net' option associated with the given device id. Signed-off-by: NShmulik Ladkani <shmulik.ladkani@ravellosystems.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Michael S. Tsirkin 提交于
This allows increasing the rx queue size up to 1024: unlike with tx, guests don't put in huge S/G lists into RX so the risk of running into the max 1024 limitation due to some off-by-one seems small. It's helpful for users like OVS-DPDK which don't do any buffering on the host - 1K roughly matches 500 entries in tun + 256 in the current rx queue, which seems to work reasonably well. We could probably make do with ~750 entries but virtio spec limits us to powers of two. It might be a good idea to specify an s/g size limit in a future version. It also might be possible to make the queue size smaller down the road, 64 seems like the minimal value which will still work (as guests seem to assume a queue full of 1.5K buffers is enough to process the largest incoming packet, which is ~64K). No one actually asked for this, and with virtio 1 guests can reduce ring size without need for host configuration, so don't bother with this for now. Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Jason Wang <jasowang@redhat.com> Suggested-by: NPatrik Hermansson <phermansson@gmail.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NJason Wang <jasowang@redhat.com>
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由 Peter Maydell 提交于
virtio, pc: fixes and features beginning of guest error handling for virtio devices amd iommu pc compat fixes Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> # gpg: Signature made Fri 23 Sep 2016 23:02:09 BST # gpg: using RSA key 0x281F0DB8D28D5469 # gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" # gpg: aka "Michael S. Tsirkin <mst@redhat.com>" # Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67 # Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469 * remotes/mst/tags/for_upstream: hw/i386: AMD IOMMU IVRS table hw/i386: Introduce AMD IOMMU hw/i386/trace-events: Add AMD IOMMU trace events hw/pci: Prepare for AMD IOMMU virtio: handle virtqueue_get_head() errors virtio: handle virtqueue_num_heads() errors virtio: handle virtqueue_read_next_desc() errors virtio: use unsigned int for virtqueue_get_avail_bytes() index virtio: handle virtqueue_get_avail_bytes() errors virtio: handle virtqueue_map_desc() errors virtio: migrate vdev->broken flag virtio: stop virtqueue processing if device is broken virtio: fix stray tab character target-i386: turn off CPU.l3-cache only for 2.7 and older machine types pc: clean up COMPAT macro chaining virtio: add check for descriptor's mapped address tests: add /vhost-user/flags-mismatch test tests: add a simple /vhost-user/multiqueue test tests: add /vhost-user/connect-fail test Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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- 24 9月, 2016 13 次提交
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由 David Kiarie 提交于
Add IVRS table for AMD IOMMU. Generate IVRS or DMAR depending on emulated IOMMU. Signed-off-by: NDavid Kiarie <davidkiarie4@gmail.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 David Kiarie 提交于
Add AMD IOMMU emulaton to Qemu in addition to Intel IOMMU. The IOMMU does basic translation, error checking and has a minimal IOTLB implementation. This IOMMU bypassed the need for target aborts by responding with IOMMU_NONE access rights and exempts the region 0xfee00000-0xfeefffff from translation as it is the q35 interrupt region. We advertise features that are not yet implemented to please the Linux IOMMU driver. IOTLB aims at implementing commands on real IOMMUs which is essential for debugging and may not offer any performance benefits Signed-off-by: NDavid Kiarie <davidkiarie4@gmail.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 David Kiarie 提交于
Signed-off-by: NDavid Kiarie <davidkiarie4@gmail.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 David Kiarie 提交于
Introduce PCI macros from for use by AMD IOMMU Signed-off-by: NDavid Kiarie <davidkiarie4@gmail.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Stefan Hajnoczi 提交于
Stop processing the vring if virtqueue_get_head() fetches an out-of-bounds head index. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Stefan Hajnoczi 提交于
If the avail ring index is bogus virtqueue_num_heads() must return -EINVAL. The only caller is virtqueue_get_avail_bytes(). Return saying no bytes are available when virtqueue_num_heads() fails. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Stefan Hajnoczi 提交于
Stop processing the vring if an avail ring index is invalid. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Stefan Hajnoczi 提交于
The virtio code uses int, unsigned int, and uint16_t for virtqueue indices. The uint16_t is used for the low-level descriptor layout in virtio_ring.h while code that isn't concerned with descriptor layout can use unsigned int. Use of int is problematic because it can result in signed/unsigned comparison and incompatible int*/unsigned int* pointer types. Make the virtqueue_get_avail_bytes() 'i' variable unsigned int. This eliminates the need to introduce casts and modify code further in the patches that follow. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Stefan Hajnoczi 提交于
If the vring is invalid, tell the caller no bytes are available and mark the device broken. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Stefan Hajnoczi 提交于
Errors can occur during virtqueue_pop(), especially in virtqueue_map_desc(). In order to handle this we must unmap iov[] before returning NULL. The caller will consider the virtqueue empty and the virtio_error() call will have marked the device broken. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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由 Stefan Hajnoczi 提交于
Send a subsection if the vdev->broken flag is set. This allows live migration of broken virtio devices. The subsection is only sent if vdev->broken has been set. In most cases the flag will be clear and no subsection will be sent. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Stefan Hajnoczi 提交于
QEMU prints an error message and exits when the device enters an invalid state. Terminating the process is heavy-handed. The guest may still be able to function even if there is a bug in a virtio guest driver. Moreover, exiting is a bug in nested virtualization where a nested guest could DoS other nested guests by killing a pass-through virtio device. I don't think this configuration is possible today but it is likely in the future. If the broken flag is set, do not process virtqueues or write back used descriptors. The broken flag can be cleared again by resetting the device. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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由 Stefan Hajnoczi 提交于
Fix a single occurrence of a tab character in a file that otherwise uses spaces for indentation. Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com> Reviewed-by: NFam Zheng <famz@redhat.com> Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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