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freebsd-dev/usr.sbin/bhyve
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Vincenzo Maffione 3e11768ee1 bhyve: add backend rx backpressure to virtio-net 
If a VM is flooded with more ingress packets than the guest OS
can handle, the current virtio-net code will keep reading those
packets and drop most of them as no space is available in the
receive queue. This is an undesirable receive livelock, which
is a waste of CPU and memory resources and potentially opens to
DoS attacks.
With this change, virtio-net uses the new netbe_rx_disable()
function to disable ingress operation in the backend while the
guest is short on RX buffers. Once the guest makes more buffers
available to the RX virtqueue, ingress operation is enabled again
by calling netbe_rx_enable().

Reviewed by:	bryanv, jhb
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D20987
2019-11-03 19:02:32 +00:00
..
acpi.c Catch up with ACPICA 20191018. 2019-10-24 22:33:46 +00:00
acpi.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
ahci.h Fix style(9) space vs tab. 2018-06-14 01:34:53 +00:00
atkbdc.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
atkbdc.h Import bhyve_graphics into CURRENT. Thanks to all who tested 2016-07-04 03:19:06 +00:00
audio.c bhyve/audio: don't leak resources on failed initialization. 2019-07-03 17:24:24 +00:00
audio.h Add SPDX tags to bhyve(8) HD Audio device. 2019-06-25 06:24:56 +00:00
bhyve.8 Correct name of vmm(4) pptdevs variable. 2019-07-02 14:53:51 +00:00
bhyvegc.c When this code was introduced at r300829 the author forgot to add 2018-06-13 04:00:21 +00:00
bhyvegc.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
bhyverun.c Revert r343634: 2019-02-01 03:09:11 +00:00
bhyverun.h Make bhyve SMBIOS table topology aware 2019-04-25 22:53:55 +00:00
block_if.c Increase the VirtIO segment count to support modern Windows guests. 2019-05-02 22:46:37 +00:00
block_if.h Increase the VirtIO segment count to support modern Windows guests. 2019-05-02 22:46:37 +00:00
bootrom.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
bootrom.h Fix style(9) space vs tab. 2018-06-14 01:34:53 +00:00
console.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
console.h Fix style(9) space vs tab. 2018-06-14 01:34:53 +00:00
consport.c Use capsicum_helpers(3) that allow us to simplify the code and its functions 2019-01-16 00:39:23 +00:00
dbgport.c Use capsicum_helpers(3) that allow us to simplify the code and its functions 2019-01-16 00:39:23 +00:00
dbgport.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
fwctl.c Always treat firmware request and response sizes as unsigned. 2018-12-04 18:28:25 +00:00
fwctl.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
gdb.c Use parse_integer to avoid sign extension. 2019-06-05 23:37:50 +00:00
gdb.h Drop "All rights reserved" from my copyright statements. 2019-03-06 22:11:45 +00:00
hda_codec.c Add SPDX tags to bhyve(8) HD Audio device. 2019-06-25 06:24:56 +00:00
hda_reg.h Add SPDX tags to bhyve(8) HD Audio device. 2019-06-25 06:24:56 +00:00
hdac_reg.h Add SPDX tags to bhyve(8) HD Audio device. 2019-06-25 06:24:56 +00:00
inout.c Fix style(9) space vs tab. 2018-06-14 01:34:53 +00:00
inout.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
ioapic.c various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
ioapic.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
iov.c Fix several iov handling bugs in bhyve virtio-scsi backend. 2018-12-07 20:30:00 +00:00
iov.h Fix several iov handling bugs in bhyve virtio-scsi backend. 2018-12-07 20:30:00 +00:00
Makefile bhyve: abstraction for network backends 2019-07-07 12:15:24 +00:00
Makefile.depend DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
mem.c Add support for writing to guest memory in the debug server. 2019-05-24 00:34:13 +00:00
mem.h Add support for writing to guest memory in the debug server. 2019-05-24 00:34:13 +00:00
mevent_test.c Improve bhyve exit(3) error code. 2018-07-11 03:23:09 +00:00
mevent.c bhyve: add backend rx backpressure to virtio-net 2019-11-03 19:02:32 +00:00
mevent.h bhyve: add backend rx backpressure to virtio-net 2019-11-03 19:02:32 +00:00
mptbl.c various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
mptbl.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
net_backends.c bhyve: add backend rx backpressure to virtio-net 2019-11-03 19:02:32 +00:00
net_backends.h bhyve: support for enabling/disabling the net backend 2019-09-28 12:02:43 +00:00
net_utils.c bhyve: add missing license identifiers in net_utils and net_backend 2019-07-09 22:04:33 +00:00
net_utils.h bhyve: add missing license identifiers in net_utils and net_backend 2019-07-09 22:04:33 +00:00
pci_ahci.c Define AHCI_PORT_IDENT and increase by 1 the VTBLK_BLK_ID_BYTES 2018-11-20 22:21:19 +00:00
pci_e82545.c bhyve: add backend rx backpressure to virtio-net 2019-11-03 19:02:32 +00:00
pci_emul.c Catch up with ACPICA 20191018. 2019-10-24 22:33:46 +00:00
pci_emul.h Keep the shadow PCIR_COMMAND synced with the real one for pass through. 2019-06-07 15:53:27 +00:00
pci_fbuf.c usr.sbin/bhyve: commit miss from r349918 2019-07-11 19:51:33 +00:00
pci_hda.c Fix the register layout for the Buffer Descript List Entry. It 2019-07-23 18:40:07 +00:00
pci_hda.h Add SPDX tags to bhyve(8) HD Audio device. 2019-06-25 06:24:56 +00:00
pci_hostbridge.c various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
pci_irq.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
pci_irq.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
pci_lpc.c Add -s "help" and -l "help" to print a list of supported PCI and LPC devices. 2018-08-22 20:23:08 +00:00
pci_lpc.h Add -s "help" and -l "help" to print a list of supported PCI and LPC devices. 2018-08-22 20:23:08 +00:00
pci_nvme.c bhyve: update the NVMe CQ based on the status 2019-07-17 03:19:30 +00:00
pci_passthru.c usr.sbin/bhyve: only unassign a pt device after obtaining bus/slot/func 2019-07-12 18:33:58 +00:00
pci_uart.c various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
pci_virtio_block.c Increase the VirtIO segment count to support modern Windows guests. 2019-05-02 22:46:37 +00:00
pci_virtio_console.c usr.sbin/bhyve: free resources when erroring out of pci_vtcon_sock_add() 2019-07-12 18:20:56 +00:00
pci_virtio_net.c bhyve: add backend rx backpressure to virtio-net 2019-11-03 19:02:32 +00:00
pci_virtio_rnd.c Use capsicum_helpers(3) that allow us to simplify the code and its functions 2019-01-16 00:39:23 +00:00
pci_virtio_scsi.c usr.sbin/bhyve: prevent use-after-free in virtio scsi request handling 2019-07-12 18:17:35 +00:00
pci_xhci.c bhyve: correct out-of-bounds read in XHCI device emulation 2019-07-23 16:27:36 +00:00
pci_xhci.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
pm.c various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
post.c various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
ps2kbd.c Remove printf for debug purpose forgotten on r340046. 2018-11-02 13:48:06 +00:00
ps2kbd.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
ps2mouse.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
ps2mouse.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
rfb.c usr.sbin/bhyve: free resources if there is an initialization error in rfb 2019-07-11 19:07:45 +00:00
rfb.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
rtc.c Fix style(9) space vs tab. 2018-06-14 01:34:53 +00:00
rtc.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
smbiostbl.c Make bhyve SMBIOS table topology aware 2019-04-25 22:53:55 +00:00
smbiostbl.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
sockstream.c Fix style(9) space vs tab. 2018-06-14 01:34:53 +00:00
sockstream.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
spinup_ap.c various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
spinup_ap.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
task_switch.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
uart_emul.c usr.sbin/bhyve: don't leak a FD if the device is not a tty 2019-07-12 18:13:58 +00:00
uart_emul.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00
usb_emul.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
usb_emul.h Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
usb_mouse.c Revert r343634: 2019-02-01 03:09:11 +00:00
vga.c Add SPDX tags to bhyve(8). 2018-06-13 03:22:08 +00:00
vga.h Fix style(9) space vs tab. 2018-06-14 01:34:53 +00:00
virtio.c bhyve: virtio: introduce vq_kick_enable() and vq_kick_disable() 2019-06-11 15:52:41 +00:00
virtio.h bhyve: virtio: introduce vq_kick_enable() and vq_kick_disable() 2019-06-11 15:52:41 +00:00
xmsr.c Emulate the AMD MSR_LS_CFG MSR used for various Ryzen errata. 2019-06-03 23:17:35 +00:00
xmsr.h various: general adoption of SPDX licensing ID tags. 2017-11-27 15:37:16 +00:00