This patch removes support for the cow file format.
Normally we do not break backwards compatibility but in this case there
is no impact and it is the most logical option. Extraordinary claims
require extraordinary evidence so I will show why removing the cow block
driver is the right thing to do.
The cow file format is the disk image format for Usermode Linux, a way
of running a Linux system in userspace. The performance of UML was
never great and it was hacky, but it enjoyed some popularity before
hardware virtualization support became mainstream.
QEMU's block/cow.c is supposed to read this image file format.
Unfortunately the file format was underspecified:
1. Earlier Linux versions used the MAXPATHLEN constant for the backing
filename field. The value of MAXPATHLEN can change, so Linux
switched to a 4096 literal but QEMU has a 1024 literal.
2. Padding was not used on the header struct (both in the Linux kernel
and in QEMU) so the struct layout varied across architectures. In
particular, i386 and x86_64 were different due to int64_t alignment
differences. Linux now uses __attribute__((packed)), QEMU does not.
Therefore:
1. QEMU cow images do not conform to the Linux cow image file format.
2. cow images cannot be shared between different host architectures.
This means QEMU cow images are useless and QEMU has not had bug reports
from users actually hitting these issues.
Let's get rid of this thing, it serves no purpose and no one will be
affected.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-id: 1410877464-20481-1-git-send-email-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
we currently have the Nagle algorithm enabled for all outgoing VNC updates.
This may delay sensitive updates as mouse movements or typing in the console.
As we currently prepare all data in a buffer and then send as much as we can
disabling the Nagle algorithm should not cause big trouble. Well established
VNC servers like TightVNC set TCP_NODELAY as well.
A regular framebuffer update request generates exactly one framebuffer update
which should be pushed out as fast as possible.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Now we have removed the legacy register_char_driver() we can
rename register_char_driver_qapi() to the more obvious and
shorter name.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1409653457-27863-6-git-send-email-peter.maydell@linaro.org
Don't call SPICE API directly to set password given in command line, but
use the internal API, saving password for later calls.
This solves losing password when changing expiration in qemu monitor.
https://bugzilla.redhat.com/show_bug.cgi?id=1138639
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
If we need to, we should use the pixman formats instead but for
now this is unused except in commented out code so take it out
to avoid further confusion about surface endianness.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Helper function for copying data from linebuf to framebuffer using
pixman, possibly converting in case src and dst formats differ.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Calls dpy_gfx_update for all dirty scanlines. Works for
DisplaySurfaces backed by guest memory (i.e. the ones created
using qemu_create_displaysurface_guestmem).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds a qemu_create_displaysurface_guestmem helper function.
Works simliar to qemu_create_displaysurface_from, but accepts a
guest address instead of a host pointer and it handles
cpu_physical_memory_{map,unmap} for you.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
With this patch the qemu console core stops using PixelFormat and pixman
format codes side-by-side, pixman format code is the primary way to
specify the DisplaySurface format:
* DisplaySurface stops carrying a PixelFormat field.
* qemu_create_displaysurface_from() expects a pixman format now.
Functions to convert PixelFormat to pixman_format_code_t (and back)
exist for those who still use PixelFormat. As PixelFormat allows
easy access to masks and shifts it will probably continue to exist.
[ xenfb added by Benjamin Herrenschmidt ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Use the new qemu_pixelformat_from_pixman and qemu_default_pixman_format
functions to reimplement qemu_default_pixelformat
(qemu_different_endianness_pixelformat too).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Function to convert pixman format codes to qemu PixelFormat.
[ Benjamin Herrenschmidt: fix BGRA+RGBA shifts ]
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Related spice-only bug. We have a fixed 16 MB buffer here, being
presented to the spice-server as qxl video memory in case spice is
used with a non-qxl card. It's also used with qxl in vga mode.
When using display resolutions requiring more than 16 MB of memory we
are going to overflow that buffer. In theory the guest can write,
indirectly via spice-server. The spice-server clears the memory after
setting a new video mode though, triggering a segfault in the overflow
case, so qemu crashes before the guest has a chance to do something
evil.
Fix that by switching to dynamic allocation for the buffer.
CVE-2014-3615
Cc: qemu-stable@nongnu.org
Cc: secalert@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
imitate nearby code about using '!value' or 'value == NULL'
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
We need to remember has_updates for each vnc client. Otherwise it might
happen that vnc_update_client(has_dirty=1) takes the first exit due to
output buffers not being flushed yet and subsequent calls with
has_dirty=0 take the second exit, wrongly assuming there is nothing to
do because the work defered in the first call is ignored.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
If the client asks for !incremental frame updates, it has lost its content
so dirty doesn't matter - it has to see the full frame, so setting force_update
Signed-off-by: Stephan Kulow <coolo@suse.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Peter Lieven <pl@kamp.de>
(Resending for correct email addresses via MAINTAINERS ...)
In the GTK UI, after changing focus to the qemu monitor Notebook Page,
when restoring focus to the virtual machine page, the keyboard focus is lost
to a hidden GTK widget. Focus can only be restored to the virtual machine by
pressing "tab" or any of the four directional arrow keys.
Clicking in the window or grabbing/ungrabbing input does not restore keyboard
focus to the child widget.
This patch adjusts the Notebook page switching callback to automatically
steal keyboard focus on the Page switch event, so that keyboard input
does not appear to break or disappear after tabbing to the QEMU monitor.
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Set auth to sasl when sasl is enabled, this makes "info spice" correctly
display sasl auth. Also throw an error in case someone tries to set
a spice password via monitor without auth mode being "spice".
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
this patch makes the VNC server work correctly if the
server surface and the guest surface have different sizes.
Basically the server surface is adjusted to not exceed VNC_MAX_WIDTH
x VNC_MAX_HEIGHT and additionally the width is rounded up to multiple of
VNC_DIRTY_PIXELS_PER_BIT.
If we have a resolution whose width is not dividable by VNC_DIRTY_PIXELS_PER_BIT
we now get a small black bar on the right of the screen.
If the surface is too big to fit the limits only the upper left area is shown.
On top of that this fixes 2 memory corruption issues:
The first was actually discovered during playing
around with a Windows 7 vServer. During resolution
change in Windows 7 it happens sometimes that Windows
changes to an intermediate resolution where
server_stride % cmp_bytes != 0 (in vnc_refresh_server_surface).
This happens only if width % VNC_DIRTY_PIXELS_PER_BIT != 0.
The second is a theoretical issue, but is maybe exploitable
by the guest. If for some reason the guest surface size is bigger
than VNC_MAX_WIDTH x VNC_MAX_HEIGHT we end up in severe corruption since
this limit is nowhere enforced.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
currently a malicious client could define a payload
size of 2^32 - 1 bytes and send up to that size of
data to the vnc server. The server would allocated
that amount of memory which could easily create an
out of memory condition.
This patch limits the payload size to 1MB max.
Please note that client_cut_text messages are currently
silently ignored.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Honour the -show-cursor command line option (which forces the mouse pointer
to always be displayed even when input is grabbed) in the Cocoa UI backend.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1403516125-14568-5-git-send-email-peter.maydell@linaro.org
Fix handling of absolute positioning devices, which were basically
unusable for two separate reasons:
(1) as soon as you pressed the left mouse button we would call
CGAssociateMouseAndMouseCursorPosition(FALSE), which means that
the absolute coordinates of the mouse events are never updated
(2) we didn't account for MacOSX coordinate origin being bottom left
rather than top right, and so all the Y values sent to the guest
were inverted
We fix (1) by aligning our behaviour with the SDL UI backend for
absolute devices:
* when the mouse moves into the window we do a grab (which means
hiding the host cursor and sending special keys to the guest)
* when the mouse moves out of the window we un-grab
and fix (2) by doing the correct transformation in the call to
qemu_input_queue_abs().
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1403516125-14568-4-git-send-email-peter.maydell@linaro.org
Add a utility method to check whether a point is within the current window
bounds, and use it in the various places in the mouse handling code that
were opencoding the check.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1403516125-14568-3-git-send-email-peter.maydell@linaro.org
Do the recalculation of the content dimensions in switchSurface if the
current cdx is zero as well as if the new surface is a different size to
the current window. This catches the case where the first surface registered
happens to be 640x480 (our current window size), and fixes a bug where we
would always display a black screen until the first surface of a different
size was registered.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1403516125-14568-2-git-send-email-peter.maydell@linaro.org
The next patch will modify this function to initialize state that is
common to all backends.
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
SPICE_INITIALIZED, SPICE_CONNECTED, SPICE_DISCONNECTED and
SPICE_MIGRATE_COMPLETED are converted in one patch, since they
use some common functions. inet_strfamily() is removed since no
callers exist anymore.
Note that there is no existing doc for SPICE_MIGRATE_COMPLETED
in docs/qmp/qmp-events.txt before this patch.
Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Since VNC_CONNECTED, VNC_DISCONNECTED, VNC_INITIALIZED share some
common functions, convert them in one patch.
Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
In order to let event defines use existing types later, instead of
redefine new ones, some old type defines for spice and vnc are changed,
and BlockErrorAction is moved from block.h to qapi schema. Note that
BlockErrorAction is not merged with BlockdevOnError.
At this point, VncInfo is not made a child of VncBasicInfo, because
VncBasicInfo has mandatory fields where VncInfo makes them optional.
Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Bug was added by 38ee14f4f3.
vnc_jobs_join call is missing in one code path.
Reported-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
So you'll have a mouse pointer when running non-qxl gfx cards with
mouse pointer support (virtio-gpu, IIRC vmware too).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Make configure detect gtk x11 backend and link libX11 then. Make
gtk backend specific code properly #ifdef'ed on the GTK_WINDOWING_*
backends at runtime). Our gtk ui code should build and run fine on
any platform now.
This also fixes the linker failute due to the new XkbGetKeyboard call
added by commit 3158a3482b.
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
