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David Woodhouse 7cabbdb70d hw/xen: Watches on XenStore transactions 
Firing watches on the nodes that still exist is relatively easy; just
walk the tree and look at the nodes with refcount of one.

Firing watches on *deleted* nodes is more fun. We add 'modified_in_tx'
and 'deleted_in_tx' flags to each node. Nodes with those flags cannot
be shared, as they will always be unique to the transaction in which
they were created.

When xs_node_walk would need to *create* a node as scaffolding and it
encounters a deleted_in_tx node, it can resurrect it simply by clearing
its deleted_in_tx flag. If that node originally had any *data*, they're
gone, and the modified_in_tx flag will have been set when it was first
deleted.

We then attempt to send appropriate watches when the transaction is
committed, properly delete the deleted_in_tx nodes, and remove the
modified_in_tx flag from the others.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
2023-03-07 17:04:30 +00:00
..
9pfs Don't include headers already included by qemu/osdep.h 2023-02-08 07:28:05 +01:00
acpi hw: Move ich9.h to southbridge/ 2023-02-27 22:29:01 +01:00
adc hw/adc: Make adci[*] R/W in NPCM7XX ADC 2022-07-18 13:20:14 +01:00
alpha Drop duplicate #include 2023-02-08 07:28:05 +01:00
arm hw: arm: allwinner-h3: Fix and complete H3 i2c devices 2023-03-06 15:31:24 +00:00
audio hw/audio/ac97: Split off some definitions to a header 2023-02-27 22:29:02 +01:00
avr Remove qemu-common.h include from most units 2022-04-06 14:31:55 +02:00
block hw: Replace isa_get_irq() by isa_bus_get_irq() when ISABus is available 2023-02-27 22:29:02 +01:00
char hw/char/xilinx_uartlite: Expose XILINX_UARTLITE QOM type 2023-02-27 13:27:05 +00:00
core hw: arm: Support direct boot for Linux/arm64 EFI zboot images 2023-03-06 14:08:12 +00:00
cpu hw/cpu: Mark arm11 and realview mpcore as target-independent code 2023-01-16 17:51:20 +01:00
cris Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
cxl hw/cxl/mailbox: Use new UUID network order define for cel_uuid 2023-03-02 19:13:52 -05:00
display hw/display/sm501: Add fallbacks to pixman routines 2023-02-27 22:29:02 +01:00
dma hw/isa: Rename isa_get_dma() -> isa_bus_get_dma() 2023-02-27 22:29:02 +01:00
gpio hw/gpio/max7310: Simplify max7310_realize() 2023-02-27 13:27:04 +00:00
hppa hw/isa: Rename isa_bus_irqs() -> isa_bus_register_input_irqs() 2023-02-27 22:29:02 +01:00
hyperv Fix non-first inclusions of qemu/osdep.h 2023-02-08 07:28:05 +01:00
i2c hw: allwinner-i2c: Fix TWI_CNTR_INT_FLAG on SUN6i SoCs 2023-03-06 14:08:12 +00:00
i386 hw/xen: Watches on XenStore transactions 2023-03-07 17:04:30 +00:00
ide hw/ide/via: Replace magic 2 value by ARRAY_SIZE / MAX_IDE_DEVS 2023-02-27 22:29:02 +01:00
input hw/input: Clean up includes 2023-02-08 07:16:23 +01:00
intc hw: intc: Use cpu_by_arch_id to fetch CPU state 2023-03-05 15:33:40 -08:00
ipack include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
ipmi include/hw/pci: Split pci_device.h off pci.h 2023-01-08 01:54:22 -05:00
isa hw/rtc/mc146818rtc: Rename RTCState -> MC146818RtcState 2023-02-27 22:29:02 +01:00
loongarch hw/loongarch/virt: add system_powerdown hmp command support 2023-03-03 09:37:30 +08:00
m68k hw: Add compat machines for 8.0 2022-12-21 06:35:28 -05:00
mem hw/cxl: set cxl-type3 device type to PCI_CLASS_MEMORY_CXL 2023-03-02 19:13:52 -05:00
microblaze hw/char/xilinx_uartlite: Open-code xilinx_uartlite_create() 2023-02-27 13:27:05 +00:00
mips hw/isa: Rename isa_bus_irqs() -> isa_bus_register_input_irqs() 2023-02-27 22:29:02 +01:00
misc hw/misc: add a toy i2c echo device 2023-03-02 13:57:50 +01:00
net virtio-net: clear guest_announce feature if no cvq backend 2023-03-02 03:10:46 -05:00
nios2 hw/nios2: set machine->fdt in nios2_load_dtb() 2022-10-17 16:15:10 -03:00
nubus hw/nubus/nubus-device: Fix memory leak in nubus_device_realize 2023-02-27 22:29:01 +01:00
nvme hw/nvme: flexible data placement emulation 2023-03-06 15:28:02 +01:00
nvram aspeed queue: 2023-03-03 17:11:22 +00:00
openrisc openrisc: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
pci virtio,pc,pci: features, cleanups, fixes 2023-03-03 13:35:54 +00:00
pci-bridge hw/pci-bridge/cxl_downstream: Fix type naming mismatch 2023-03-02 19:13:52 -05:00
pci-host pnv_phb4_pec: Simplify/align code to parent user-created PHBs 2023-03-03 16:50:17 -03:00
pcmcia hw/pcmcia: Do not register PCMCIA type if not required 2021-05-02 17:24:50 +02:00
ppc pnv_phb4_pec: Simplify/align code to parent user-created PHBs 2023-03-03 16:50:17 -03:00
rdma Drop duplicate #include 2023-02-08 07:28:05 +01:00
remote Drop duplicate #include 2023-02-08 07:28:05 +01:00
riscv hw/riscv/virt.c: Initialize the ACPI tables 2023-03-06 11:35:07 -08:00
rtc hw/rtc: Rename rtc_[get|set]_memory -> mc146818rtc_[get|set]_cmos_data 2023-02-27 22:29:02 +01:00
rx rx: re-randomize rng-seed on reboot 2022-10-27 11:34:31 +01:00
s390x s390x/pv: Add support for asynchronous teardown for reboot 2023-02-27 09:15:39 +01:00
scsi Updated the FSF address to <https://www.gnu.org/licenses/> 2023-02-27 09:15:39 +01:00
sd hw/arm/omap: Drop useless casts from void * to pointer 2023-01-12 17:15:09 +00:00
sensor Do not include hw/hw.h if it is not necessary 2023-02-27 09:15:38 +01:00
sh4 hw/ide/mmio: Extract TYPE_MMIO_IDE declarations to 'hw/ide/mmio.h' 2023-02-27 22:29:02 +01:00
smbios hw/smbios: fix field corruption in type 4 table 2023-03-02 03:10:46 -05:00
sparc machine: make memory-backend a link property 2022-05-12 12:29:44 +02:00
sparc64 hw/ide: Un-inline ide_set_irq() 2023-02-27 22:29:02 +01:00
ssi aspeed/smc: Replace SysBus IRQs with GPIO lines 2023-03-02 13:57:50 +01:00
timer hw/timer/hpet: Fix expiration time overflow 2023-03-02 03:10:47 -05:00
tpm hw/tpm: Move tpm_ppi.c out of target-specific source set 2023-01-16 17:51:20 +01:00
tricore hw/tricore: fix inclusion of tricore_testboard 2021-07-20 20:10:21 +02:00
usb hw/usb/xhci-nec: Replace container_of() by NEC_XHCI() QOM cast macro 2023-02-27 22:29:02 +01:00
vfio hw/vfio/ccw: Replace DO_UPCAST(VFIOCCWDevice) by VFIO_CCW() 2023-02-27 09:15:38 +01:00
virtio vhost: avoid a potential use of an uninitialized variable in vhost_svq_poll() 2023-03-02 19:13:51 -05:00
watchdog hw/watchdog/wdt_aspeed: Log unimplemented registers as UNIMP level 2023-02-07 09:02:05 +01:00
xen hw/xen/xen_pt: fix uninitialized variable 2023-03-06 11:27:37 +00:00
xenpv hw/xen: Subsume xen_be_register_common() into xen_be_init() 2023-03-01 09:09:22 +00:00
xtensa hw/xtensa: fix reset value of MIROUT register of MX PIC 2022-05-06 15:27:40 -07:00
Kconfig xen: add CONFIG_XEN_BUS and CONFIG_XEN_EMU options for Xen emulation 2023-03-01 08:22:49 +00:00
meson.build hw/loongarch: Add support loongson3 virt machine type. 2022-06-06 18:09:03 +00:00