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Re: [Qemu-devel] [PATCH 4/4] add qmp screendump-async
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From: |
Alon Levy |
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Subject: |
Re: [Qemu-devel] [PATCH 4/4] add qmp screendump-async |
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Date: |
Sat, 25 Feb 2012 10:46:07 +0200 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Feb 24, 2012 at 04:40:15PM -0600, Anthony Liguori wrote:
> On 02/24/2012 03:22 PM, Alon Levy wrote:
> >This is an across the board change since I wanted to keep the existing
> >(good imo) single graphic_console_init callback setter, instead of
> >introducing a new cb that isn't set by it but instead by a second
> >initialization function.
> >
> >Signed-off-by: Alon Levy<address@hidden>
>
> What's the rationale for this?
There is a hang possible with the current screendump command, qxl, a
spice client using libvirt and spice-gtk such as virt-viewer /
remote-viewer, where you have:
1. libvirt waiting for screendump to complete
2. screendump waiting for spice server thread to render
3. spice server thread waiting for spice client to read messages
4. spice client == libvirt client, waiting for screendump completion
The solution to this is to have 2 become asyncronous. See
http://patchwork.ozlabs.org/patch/142985/
The result of 2 becoming async is that now screendump completes before
the framebuffer has been updated, resulting in a screendump of an older
state. To really fix it I need to have the screendump (ppm_save) done
with the newer state, which is what
http://patchwork.ozlabs.org/patch/142977/ does. But for the user
(libvirt/autotest) to know when the file is ready there now needs to be
some event. That's what this series does.
>
> I really don't want a plethora of pseudo-async commands.
>
> Regards,
>
> Anthony Liguori
>
> >---
> > console.c | 25 +++++++++++++++++++++++--
> > console.h | 5 +++++
> > hw/blizzard.c | 2 +-
> > hw/cirrus_vga.c | 4 ++--
> > hw/exynos4210_fimd.c | 3 ++-
> > hw/g364fb.c | 2 +-
> > hw/jazz_led.c | 3 ++-
> > hw/milkymist-vgafb.c | 2 +-
> > hw/musicpal.c | 2 +-
> > hw/omap_dss.c | 4 +++-
> > hw/omap_lcdc.c | 2 +-
> > hw/pl110.c | 2 +-
> > hw/pxa2xx_lcd.c | 2 +-
> > hw/qxl.c | 3 ++-
> > hw/sm501.c | 4 ++--
> > hw/ssd0303.c | 2 +-
> > hw/ssd0323.c | 2 +-
> > hw/tc6393xb.c | 1 +
> > hw/tcx.c | 4 ++--
> > hw/vga-isa-mm.c | 3 ++-
> > hw/vga-isa.c | 3 ++-
> > hw/vga-pci.c | 3 ++-
> > hw/vga_int.h | 1 +
> > hw/vmware_vga.c | 3 ++-
> > hw/xenfb.c | 2 ++
> > monitor.c | 5 +++++
> > qapi-schema.json | 20 ++++++++++++++++++++
> > qmp-commands.hx | 26 ++++++++++++++++++++++++++
> > 28 files changed, 115 insertions(+), 25 deletions(-)
> >
> >diff --git a/console.c b/console.c
> >index 6750538..ced2aa7 100644
> >--- a/console.c
> >+++ b/console.c
> >@@ -124,6 +124,7 @@ struct TextConsole {
> > vga_hw_update_ptr hw_update;
> > vga_hw_invalidate_ptr hw_invalidate;
> > vga_hw_screen_dump_ptr hw_screen_dump;
> >+ vga_hw_screen_dump_async_ptr hw_screen_dump_async;
> > vga_hw_text_update_ptr hw_text_update;
> > void *hw;
> >
> >@@ -175,8 +176,9 @@ void vga_hw_invalidate(void)
> > active_console->hw_invalidate(active_console->hw);
> > }
> >
> >-void vga_hw_screen_dump(const char *filename)
> >+static void vga_hw_screen_dump_helper(const char *filename, bool async)
> > {
> >+ bool event_sent = false;
> > TextConsole *previous_active_console;
> > bool cswitch;
> >
> >@@ -188,17 +190,33 @@ void vga_hw_screen_dump(const char *filename)
> > if (cswitch) {
> > console_select(0);
> > }
> >- if (consoles[0]&& consoles[0]->hw_screen_dump) {
> >+ if (async&& consoles[0]&& consoles[0]->hw_screen_dump_async) {
> >+ consoles[0]->hw_screen_dump_async(consoles[0]->hw, filename,
> >cswitch);
> >+ event_sent = true;
> >+ } else if (consoles[0]&& consoles[0]->hw_screen_dump) {
> > consoles[0]->hw_screen_dump(consoles[0]->hw, filename, cswitch);
> > } else {
> > error_report("screen dump not implemented");
> > }
> >+ if (async&& !event_sent) {
> >+ monitor_protocol_screen_dump_complete_event(filename);
> >+ }
> >
> > if (cswitch) {
> > console_select(previous_active_console->index);
> > }
> > }
> >
> >+void vga_hw_screen_dump(const char *filename)
> >+{
> >+ vga_hw_screen_dump_helper(filename, false);
> >+}
> >+
> >+void vga_hw_screen_dump_async(const char *filename)
> >+{
> >+ vga_hw_screen_dump_helper(filename, true);
> >+}
> >+
> > void vga_hw_text_update(console_ch_t *chardata)
> > {
> > if (active_console&& active_console->hw_text_update)
> >@@ -1403,6 +1421,8 @@ DisplayState *graphic_console_init(vga_hw_update_ptr
> >update,
> > vga_hw_invalidate_ptr invalidate,
> > vga_hw_screen_dump_ptr screen_dump,
> > vga_hw_text_update_ptr text_update,
> >+ vga_hw_screen_dump_async_ptr
> >+ screen_dump_async,
> > void *opaque)
> > {
> > TextConsole *s;
> >@@ -1421,6 +1441,7 @@ DisplayState *graphic_console_init(vga_hw_update_ptr
> >update,
> > s->hw_update = update;
> > s->hw_invalidate = invalidate;
> > s->hw_screen_dump = screen_dump;
> >+ s->hw_screen_dump_async = screen_dump_async;
> > s->hw_text_update = text_update;
> > s->hw = opaque;
> >
> >diff --git a/console.h b/console.h
> >index c22803c..3cf28c0 100644
> >--- a/console.h
> >+++ b/console.h
> >@@ -341,17 +341,22 @@ static inline void console_write_ch(console_ch_t
> >*dest, uint32_t ch)
> > typedef void (*vga_hw_update_ptr)(void *);
> > typedef void (*vga_hw_invalidate_ptr)(void *);
> > typedef void (*vga_hw_screen_dump_ptr)(void *, const char *, bool cswitch);
> >+typedef void (*vga_hw_screen_dump_async_ptr)(void *, const char *filename,
> >+ bool cswitch);
> > typedef void (*vga_hw_text_update_ptr)(void *, console_ch_t *);
> >
> > DisplayState *graphic_console_init(vga_hw_update_ptr update,
> > vga_hw_invalidate_ptr invalidate,
> > vga_hw_screen_dump_ptr screen_dump,
> > vga_hw_text_update_ptr text_update,
> >+ vga_hw_screen_dump_async_ptr
> >+ screen_dump_async,
> > void *opaque);
> >
> > void vga_hw_update(void);
> > void vga_hw_invalidate(void);
> > void vga_hw_screen_dump(const char *filename);
> >+void vga_hw_screen_dump_async(const char *filename);
> > void vga_hw_text_update(console_ch_t *chardata);
> > void monitor_protocol_screen_dump_complete_event(const char *filename);
> >
> >diff --git a/hw/blizzard.c b/hw/blizzard.c
> >index c7d844d..cc51045 100644
> >--- a/hw/blizzard.c
> >+++ b/hw/blizzard.c
> >@@ -963,7 +963,7 @@ void *s1d13745_init(qemu_irq gpio_int)
> >
> > s->state = graphic_console_init(blizzard_update_display,
> > blizzard_invalidate_display,
> >- blizzard_screen_dump, NULL, s);
> >+ blizzard_screen_dump, NULL, NULL, s);
> >
> > switch (ds_get_bits_per_pixel(s->state)) {
> > case 0:
> >diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
> >index 4edcb94..d2a9c27 100644
> >--- a/hw/cirrus_vga.c
> >+++ b/hw/cirrus_vga.c
> >@@ -2900,7 +2900,7 @@ static int vga_initfn(ISADevice *dev)
> > isa_address_space(dev));
> > s->ds = graphic_console_init(s->update, s->invalidate,
> > s->screen_dump, s->text_update,
> >- s);
> >+ s->screen_dump_async, s);
> > rom_add_vga(VGABIOS_CIRRUS_FILENAME);
> > /* XXX ISA-LFB support */
> > /* FIXME not qdev yet */
> >@@ -2941,7 +2941,7 @@ static int pci_cirrus_vga_initfn(PCIDevice *dev)
> > cirrus_init_common(s, device_id, 1, pci_address_space(dev));
> > s->vga.ds = graphic_console_init(s->vga.update, s->vga.invalidate,
> > s->vga.screen_dump,
> > s->vga.text_update,
> >-&s->vga);
> >+ s->vga.screen_dump_async,&s->vga);
> >
> > /* setup PCI */
> >
> >diff --git a/hw/exynos4210_fimd.c b/hw/exynos4210_fimd.c
> >index 3313f00..2053ed0 100644
> >--- a/hw/exynos4210_fimd.c
> >+++ b/hw/exynos4210_fimd.c
> >@@ -1898,7 +1898,8 @@ static int exynos4210_fimd_init(SysBusDevice *dev)
> > "exynos4210.fimd", FIMD_REGS_SIZE);
> > sysbus_init_mmio(dev,&s->iomem);
> > s->console = graphic_console_init(exynos4210_fimd_update,
> >- exynos4210_fimd_invalidate, NULL, NULL,
> >s);
> >+ exynos4210_fimd_invalidate,
> >+ NULL, NULL, NULL, s);
> >
> > return 0;
> > }
> >diff --git a/hw/g364fb.c b/hw/g364fb.c
> >index 3a0b68f..8ae40d8 100644
> >--- a/hw/g364fb.c
> >+++ b/hw/g364fb.c
> >@@ -517,7 +517,7 @@ static void g364fb_init(DeviceState *dev, G364State *s)
> >
> > s->ds = graphic_console_init(g364fb_update_display,
> > g364fb_invalidate_display,
> >- g364fb_screen_dump, NULL, s);
> >+ g364fb_screen_dump, NULL, NULL, s);
> >
> > memory_region_init_io(&s->mem_ctrl,&g364fb_ctrl_ops, s, "ctrl",
> > 0x180000);
> > memory_region_init_ram_ptr(&s->mem_vram, "vram",
> >diff --git a/hw/jazz_led.c b/hw/jazz_led.c
> >index 6486523..bb5daf7 100644
> >--- a/hw/jazz_led.c
> >+++ b/hw/jazz_led.c
> >@@ -251,7 +251,8 @@ static int jazz_led_init(SysBusDevice *dev)
> > s->ds = graphic_console_init(jazz_led_update_display,
> > jazz_led_invalidate_display,
> > NULL,
> >- jazz_led_text_update, s);
> >+ jazz_led_text_update,
> >+ NULL, s);
> >
> > return 0;
> > }
> >diff --git a/hw/milkymist-vgafb.c b/hw/milkymist-vgafb.c
> >index 69afd72..ae018d1 100644
> >--- a/hw/milkymist-vgafb.c
> >+++ b/hw/milkymist-vgafb.c
> >@@ -276,7 +276,7 @@ static int milkymist_vgafb_init(SysBusDevice *dev)
> >
> > s->ds = graphic_console_init(vgafb_update_display,
> > vgafb_invalidate_display,
> >- NULL, NULL, s);
> >+ NULL, NULL, NULL, s);
> >
> > return 0;
> > }
> >diff --git a/hw/musicpal.c b/hw/musicpal.c
> >index 187a1ae..2fc391b 100644
> >--- a/hw/musicpal.c
> >+++ b/hw/musicpal.c
> >@@ -611,7 +611,7 @@ static int musicpal_lcd_init(SysBusDevice *dev)
> > sysbus_init_mmio(dev,&s->iomem);
> >
> > s->ds = graphic_console_init(lcd_refresh, lcd_invalidate,
> >- NULL, NULL, s);
> >+ NULL, NULL, NULL, s);
> > qemu_console_resize(s->ds, 128*3, 64*3);
> >
> > qdev_init_gpio_in(&dev->qdev, musicpal_lcd_gpio_brigthness_in, 3);
> >diff --git a/hw/omap_dss.c b/hw/omap_dss.c
> >index 86ed6ea..0e8243e 100644
> >--- a/hw/omap_dss.c
> >+++ b/hw/omap_dss.c
> >@@ -1072,7 +1072,9 @@ struct omap_dss_s *omap_dss_init(struct
> >omap_target_agent_s *ta,
> >
> > #if 0
> > s->state = graphic_console_init(omap_update_display,
> >- omap_invalidate_display,
> >omap_screen_dump, s);
> >+ omap_invalidate_display,
> >+ omap_screen_dump,
> >+ NULL, NULL, s);
> > #endif
> >
> > return s;
> >diff --git a/hw/omap_lcdc.c b/hw/omap_lcdc.c
> >index f172093..d91e88d 100644
> >--- a/hw/omap_lcdc.c
> >+++ b/hw/omap_lcdc.c
> >@@ -452,7 +452,7 @@ struct omap_lcd_panel_s *omap_lcdc_init(MemoryRegion
> >*sysmem,
> >
> > s->state = graphic_console_init(omap_update_display,
> > omap_invalidate_display,
> >- omap_screen_dump, NULL, s);
> >+ omap_screen_dump, NULL, NULL, s);
> >
> > return s;
> > }
> >diff --git a/hw/pl110.c b/hw/pl110.c
> >index f94608c..32ee89c 100644
> >--- a/hw/pl110.c
> >+++ b/hw/pl110.c
> >@@ -451,7 +451,7 @@ static int pl110_init(SysBusDevice *dev)
> > qdev_init_gpio_in(&s->busdev.qdev, pl110_mux_ctrl_set, 1);
> > s->ds = graphic_console_init(pl110_update_display,
> > pl110_invalidate_display,
> >- NULL, NULL, s);
> >+ NULL, NULL, NULL, s);
> > return 0;
> > }
> >
> >diff --git a/hw/pxa2xx_lcd.c b/hw/pxa2xx_lcd.c
> >index fcbdfb3..5345fb4 100644
> >--- a/hw/pxa2xx_lcd.c
> >+++ b/hw/pxa2xx_lcd.c
> >@@ -1004,7 +1004,7 @@ PXA2xxLCDState *pxa2xx_lcdc_init(MemoryRegion *sysmem,
> >
> > s->ds = graphic_console_init(pxa2xx_update_display,
> > pxa2xx_invalidate_display,
> >- NULL, NULL, s);
> >+ NULL, NULL, NULL, s);
> >
> > switch (ds_get_bits_per_pixel(s->ds)) {
> > case 0:
> >diff --git a/hw/qxl.c b/hw/qxl.c
> >index d83d245..61a7edd 100644
> >--- a/hw/qxl.c
> >+++ b/hw/qxl.c
> >@@ -1727,7 +1727,8 @@ static int qxl_init_primary(PCIDevice *dev)
> > portio_list_add(qxl_vga_port_list, pci_address_space_io(dev), 0x3b0);
> >
> > vga->ds = graphic_console_init(qxl_hw_update, qxl_hw_invalidate,
> >- qxl_hw_screen_dump, qxl_hw_text_update,
> >qxl);
> >+ qxl_hw_screen_dump, qxl_hw_text_update,
> >+ NULL, qxl);
> > qemu_spice_display_init_common(&qxl->ssd, vga->ds);
> >
> > qxl0 = qxl;
> >diff --git a/hw/sm501.c b/hw/sm501.c
> >index 786e076..8b150be 100644
> >--- a/hw/sm501.c
> >+++ b/hw/sm501.c
> >@@ -1442,6 +1442,6 @@ void sm501_init(MemoryRegion *address_space_mem,
> >uint32_t base,
> > }
> >
> > /* create qemu graphic console */
> >- s->ds = graphic_console_init(sm501_update_display, NULL,
> >- NULL, NULL, s);
> >+ s->ds = graphic_console_init(sm501_update_display,
> >+ NULL, NULL, NULL, NULL, s);
> > }
> >diff --git a/hw/ssd0303.c b/hw/ssd0303.c
> >index 4e1ee6e..05e6686 100644
> >--- a/hw/ssd0303.c
> >+++ b/hw/ssd0303.c
> >@@ -289,7 +289,7 @@ static int ssd0303_init(I2CSlave *i2c)
> >
> > s->ds = graphic_console_init(ssd0303_update_display,
> > ssd0303_invalidate_display,
> >- NULL, NULL, s);
> >+ NULL, NULL, NULL, s);
> > qemu_console_resize(s->ds, 96 * MAGNIFY, 16 * MAGNIFY);
> > return 0;
> > }
> >diff --git a/hw/ssd0323.c b/hw/ssd0323.c
> >index b0b2e94..5e3491f 100644
> >--- a/hw/ssd0323.c
> >+++ b/hw/ssd0323.c
> >@@ -330,7 +330,7 @@ static int ssd0323_init(SSISlave *dev)
> > s->row_end = 79;
> > s->ds = graphic_console_init(ssd0323_update_display,
> > ssd0323_invalidate_display,
> >- NULL, NULL, s);
> >+ NULL, NULL, NULL, s);
> > qemu_console_resize(s->ds, 128 * MAGNIFY, 64 * MAGNIFY);
> >
> > qdev_init_gpio_in(&dev->qdev, ssd0323_cd, 1);
> >diff --git a/hw/tc6393xb.c b/hw/tc6393xb.c
> >index 420925c..853b180 100644
> >--- a/hw/tc6393xb.c
> >+++ b/hw/tc6393xb.c
> >@@ -581,6 +581,7 @@ TC6393xbState *tc6393xb_init(MemoryRegion *sysmem,
> >uint32_t base, qemu_irq irq)
> > NULL, /* invalidate */
> > NULL, /* screen_dump */
> > NULL, /* text_update */
> >+ NULL, /* screen_dump_async */
> > s);
> >
> > return s;
> >diff --git a/hw/tcx.c b/hw/tcx.c
> >index ac7dcb4..9214dec 100644
> >--- a/hw/tcx.c
> >+++ b/hw/tcx.c
> >@@ -558,7 +558,7 @@ static int tcx_init1(SysBusDevice *dev)
> >
> > s->ds = graphic_console_init(tcx24_update_display,
> > tcx24_invalidate_display,
> >- tcx24_screen_dump, NULL, s);
> >+ tcx24_screen_dump, NULL, NULL, s);
> > } else {
> > /* THC 8 bit (dummy) */
> > memory_region_init_io(&s->thc8,&dummy_ops, s, "tcx.thc8",
> >@@ -567,7 +567,7 @@ static int tcx_init1(SysBusDevice *dev)
> >
> > s->ds = graphic_console_init(tcx_update_display,
> > tcx_invalidate_display,
> >- tcx_screen_dump, NULL, s);
> >+ tcx_screen_dump, NULL, NULL, s);
> > }
> >
> > qemu_console_resize(s->ds, s->width, s->height);
> >diff --git a/hw/vga-isa-mm.c b/hw/vga-isa-mm.c
> >index f8984c6..87b8fc6 100644
> >--- a/hw/vga-isa-mm.c
> >+++ b/hw/vga-isa-mm.c
> >@@ -132,7 +132,8 @@ int isa_vga_mm_init(target_phys_addr_t vram_base,
> > vga_mm_init(s, vram_base, ctrl_base, it_shift, address_space);
> >
> > s->vga.ds = graphic_console_init(s->vga.update, s->vga.invalidate,
> >- s->vga.screen_dump,
> >s->vga.text_update, s);
> >+ s->vga.screen_dump, s->vga.text_update,
> >+ s->vga.screen_dump_async, s);
> >
> > vga_init_vbe(&s->vga, address_space);
> > return 0;
> >diff --git a/hw/vga-isa.c b/hw/vga-isa.c
> >index 4bcc4db..a362ed2 100644
> >--- a/hw/vga-isa.c
> >+++ b/hw/vga-isa.c
> >@@ -61,7 +61,8 @@ static int vga_initfn(ISADevice *dev)
> > vga_io_memory, 1);
> > memory_region_set_coalescing(vga_io_memory);
> > s->ds = graphic_console_init(s->update, s->invalidate,
> >- s->screen_dump, s->text_update, s);
> >+ s->screen_dump, s->text_update,
> >+ s->screen_dump_async, s);
> >
> > vga_init_vbe(s, isa_address_space(dev));
> > /* ROM BIOS */
> >diff --git a/hw/vga-pci.c b/hw/vga-pci.c
> >index 465b643..8c8dd53 100644
> >--- a/hw/vga-pci.c
> >+++ b/hw/vga-pci.c
> >@@ -57,7 +57,8 @@ static int pci_vga_initfn(PCIDevice *dev)
> > vga_init(s, pci_address_space(dev), pci_address_space_io(dev), true);
> >
> > s->ds = graphic_console_init(s->update, s->invalidate,
> >- s->screen_dump, s->text_update, s);
> >+ s->screen_dump, s->text_update,
> >+ s->screen_dump_async, s);
> >
> > /* XXX: VGA_RAM_SIZE must be a power of two */
> > pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_MEM_PREFETCH,&s->vram);
> >diff --git a/hw/vga_int.h b/hw/vga_int.h
> >index 7685b2b..4486cfb 100644
> >--- a/hw/vga_int.h
> >+++ b/hw/vga_int.h
> >@@ -161,6 +161,7 @@ typedef struct VGACommonState {
> > vga_hw_invalidate_ptr invalidate;
> > vga_hw_screen_dump_ptr screen_dump;
> > vga_hw_text_update_ptr text_update;
> >+ vga_hw_screen_dump_async_ptr screen_dump_async;
> > /* hardware mouse cursor support */
> > uint32_t invalidated_y_table[VGA_MAX_HEIGHT / 32];
> > void (*cursor_invalidate)(struct VGACommonState *s);
> >diff --git a/hw/vmware_vga.c b/hw/vmware_vga.c
> >index 142d9f4..db96e61 100644
> >--- a/hw/vmware_vga.c
> >+++ b/hw/vmware_vga.c
> >@@ -1087,7 +1087,8 @@ static void vmsvga_init(struct vmsvga_state_s *s, int
> >vga_ram_size,
> > s->vga.ds = graphic_console_init(vmsvga_update_display,
> > vmsvga_invalidate_display,
> > vmsvga_screen_dump,
> >- vmsvga_text_update, s);
> >+ vmsvga_text_update,
> >+ NULL, s);
> >
> >
> > s->fifo_size = SVGA_FIFO_SIZE;
> >diff --git a/hw/xenfb.c b/hw/xenfb.c
> >index 1bcf171..ad9f0d7 100644
> >--- a/hw/xenfb.c
> >+++ b/hw/xenfb.c
> >@@ -906,6 +906,7 @@ static int fb_initialise(struct XenDevice *xendev)
> > xenfb_invalidate,
> > NULL,
> > NULL,
> >+ NULL,
> > fb);
> > fb->have_console = 1;
> > }
> >@@ -1015,6 +1016,7 @@ wait_more:
> > xenfb_invalidate,
> > NULL,
> > NULL,
> >+ NULL,
> > fb);
> > fb->have_console = 1;
> >
> >diff --git a/monitor.c b/monitor.c
> >index 1a65c41..91a76a1 100644
> >--- a/monitor.c
> >+++ b/monitor.c
> >@@ -901,6 +901,11 @@ static int do_screen_dump(Monitor *mon, const QDict
> >*qdict, QObject **ret_data)
> > return 0;
> > }
> >
> >+void qmp_screendump_async(const char *filename, Error **errp)
> >+{
> >+ vga_hw_screen_dump_async(filename);
> >+}
> >+
> > static void do_logfile(Monitor *mon, const QDict *qdict)
> > {
> > cpu_set_log_filename(qdict_get_str(qdict, "filename"));
> >diff --git a/qapi-schema.json b/qapi-schema.json
> >index 72b17f1..a5873cb 100644
> >--- a/qapi-schema.json
> >+++ b/qapi-schema.json
> >@@ -1595,3 +1595,23 @@
> > { 'command': 'qom-list-types',
> > 'data': { '*implements': 'str', '*abstract': 'bool' },
> > 'returns': [ 'ObjectTypeInfo' ] }
> >+
> >+##
> >+## @screendump-async:
> >+#
> >+# This command will perform a screen dump of the first console to the givem
> >+# filename. The additional parameters are unused at this time.
> >+#
> >+# @filename name of output file to write screen dump to
> >+#
> >+# Since: 1.1
> >+#
> >+# Notes: This command is experimental and may change syntax in future
> >releases.
> >+#
> >+# This command is the same as the qmp/hmp screendump command, except that on
> >+# successful completion of the scren dump the SCREEN_DUMP_COMPLETE event is
> >+# emitted.
> >+#
> >+##
> >+{ 'command': 'screendump-async',
> >+ 'data': { 'filename': 'str' } }
> >diff --git a/qmp-commands.hx b/qmp-commands.hx
> >index 705f704..ea0d051 100644
> >--- a/qmp-commands.hx
> >+++ b/qmp-commands.hx
> >@@ -170,6 +170,32 @@ Example:
> > EQMP
> >
> > {
> >+ .name = "screendump-async",
> >+ .args_type = "filename:F",
> >+ .params = "filename",
> >+ .help = "save screen into PPM image 'filename'",
> >+ .user_print = monitor_user_noop,
> >+ .mhandler.cmd_new = qmp_marshal_input_screendump_async,
> >+ },
> >+
> >+SQMP
> >+screendump-async
> >+----------------
> >+
> >+Save screen into PPM image. Fires a SCREEN_DUMP_COMPLETE event on
> >completion.
> >+
> >+Arguments:
> >+
> >+- "filename": file path (json-string)
> >+
> >+Example:
> >+
> >+-> { "execute": "screendump-async", "arguments": { "filename":
> >"/tmp/image" } }
> >+<- { "return": {} }
> >+
> >+EQMP
> >+
> >+ {
> > .name = "stop",
> > .args_type = "",
> > .mhandler.cmd_new = qmp_marshal_input_stop,
>
>
Re: [Qemu-devel] [PATCH 4/4] add qmp screendump-async, Luiz Capitulino, 2012/02/28
Re: [Qemu-devel] [PATCH 1/4] qapi-schema: fix typos and explain 'spice' auth, Alon Levy, 2012/02/28