If we save more than once we need to reset the last block info or else
only the first save has the actual block info and each subsequent save
will only use continue flags, making them unloadable independently.
Found-by: Miguel Di Ciurcio Filho <miguel.filho@gmail.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
If ->write fails, declare migration status as MIG_STATE_ERROR.
Also, in buffered_file.c, ->close the object in case of an
error.
Fixes "migrate -d "exec:dd of=file", where dd fails to open file.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
qemu-config.c doesn't contain any target-specific code, and the
TARGET_I386 conditional code didn't get compiled as a result. Removing
this enables the driftfix parameter for rtc.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
QEMUFileBuffered stops writing when the underlying QEMUFile is not ready,
and tells its producer so. However, when the underlying QEMUFile becomes
ready, it neglects to pass that information along, resulting in stoppage
of all data until the next tick (a tenths of a second).
Usually this doesn't matter, because most QEMUFiles used with QEMUFileBuffered
are almost always ready, but in the case of exec: migration this is not true,
due to the small pipe buffers used to connect to the target process. The
result is very slow migration.
Fix by detecting the readiness notification and propagating it. The detection
is a little ugly since QEMUFile overloads put_buffer() to send it, but that's
the suject for a different patch.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
According to scc_escc_um.pdf:
- Reset Highest IUS must update irq status to allow processing
of the next priority interrupt.
- rx interrupt has always higher priority than tx on same channel
The documentation only explicitly says that Reset Highest IUS
command (0x38) clears IUS bits, not that it clears the corresponding
interrupt too, so don't clear interrupts on this command.
The patch allows SunOS 4.1.4 to use the serial ports
Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
configure adds the macro WIN32_LEAN_AND_MEAN to
QEMU_CFLAGS, and SDL_syswm.h defines it, too.
This results in a compiler warning (redefinition of
WIN32_LEAN_AND_MEAN in SDL_syswm.h. That warning prevents
compilations for win32 with warning = error).
Fix this by removing the definition of WIN32_LEAN_AND_MEAN
before including SDL_syswm.h.
[blauwirbel@gmail.com: rebased]
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Mingw32 does not provide a declaration and implementation of function
setenv (which is used in sdl.c), so this patch adds both.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
3b6dac3416 apparently broke the ppc64 TCG target
compilation in the code path without guest base.
Reverting this line fixes the build.
Signed-off-by: Andreas F?rber <andreas.faerber@web.de>
Cc: malc <av1474@comtv.ru>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: malc <av1474@comtv.ru>
5da79c86a3 broke compilation on Mac OS X v10.5 ppc.
Apple's GCC 4.0.1 does not define _CALL_DARWIN. Recognize __APPLE__ again as well.
Signed-off-by: Andreas F?rber <andreas.faerber@web.de>
Cc: malc <av1474@comtv.ru>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: J?rgen Lock <nox@jelal.kn-bremen.de>
Cc: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: malc <av1474@comtv.ru>
resend for bug fix related to removal of irqfd
Support an inter-vm shared memory device that maps a shared-memory object as a
PCI device in the guest. This patch also supports interrupts between guest by
communicating over a unix domain socket. This patch applies to the qemu-kvm
repository.
-device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]
Interrupts are supported between multiple VMs by using a shared memory server
by using a chardev socket.
-device ivshmem,size=<size in format accepted by -m>[,shm=<shm name>]
[,chardev=<id>][,msi=on][,ioeventfd=on][,vectors=n][,role=peer|master]
-chardev socket,path=<path>,id=<id>
The shared memory server, sample programs and init scripts are in a git repo here:
www.gitorious.org/nahanni
Signed-off-by: Cam Macdonell <cam@cs.ualberta.ca>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
A non-migratable device should be removed before migration and re-added after.
Signed-off-by: Cam Macdonell <cam@cs.ualberta.ca>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Provide a function to add an allocated region of memory to the qemu RAM.
This patch is copied from Marcelo's qemu_ram_map() in qemu-kvm and given the
clearer name qemu_ram_alloc_from_ptr().
Signed-off-by: Cam Macdonell <cam@cs.ualberta.ca>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
The reason for not actually canceling the I/O is because with
virtualization and lots of VM running, a guest fs may mistake a
overload of the host, as an IDE timeout. So rather than canceling the
I/O, it's safer to wait I/O completion and simulate that the I/O has
completed just before the io cancellation was requested by the
guest. This way if ntfs or an app writes data without checking for
-EIO retval, and it thinks the write has succeeded, it's less likely
to run into troubles. Similar issues for reads.
Furthermore because the DMA operation is splitted into many synchronous
aio_read/write if there's more than one entry in the SG table, without this
patch the DMA would be cancelled in the middle, something we've no idea if it
happens on real hardware too or not. Overall this seems a great risk for zero
gain.
This approach is sure safer than previous code given we can't pretend all guest
fs code out there to check for errors and reply the DMA if it was completed
partially, given a timeout would never materialize on a real harddisk unless
there are defective blocks (and defective blocks are practically only an issue
for reads never for writes in any recent hardware as writing to blocks is the
way to fix them) or the harddisk breaks as a whole.
Signed-off-by: Izik Eidus <ieidus@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
bdrv_eject() gets called when a device model opens or closes the tray.
If the block driver implements method bdrv_eject(), that method gets
called. Drivers host_cdrom implements it, and it opens and closes the
physical tray, and nothing else. When a device model opens, then
closes the tray, media changes only if the user actively changes the
physical media while the tray is open. This is matches how physical
hardware behaves.
If the block driver doesn't implement method bdrv_eject(), we do
something quite different: opening the tray severs the connection to
the image by calling bdrv_close(), and closing the tray does nothing.
When the device model opens, then closes the tray, media is gone,
unless the user actively inserts another one while the tray is open,
with a suitable change command in the monitor. This isn't how
physical hardware behaves. Rather inconvenient when programs
"helpfully" eject media to give you a chance to change it. The way
bdrv_eject() behaves here turns that chance into a must, which is not
what these programs or their users expect.
Change the default action not to call bdrv_close(). Instead, note the
tray status in new BlockDriverState member tray_open. Use it in
bdrv_is_inserted().
Arguably, the device models should keep track of tray status
themselves. But this is less invasive.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Assuming that any image on a block device is not properly zero-initialized is
actually wrong: Only raw images have this problem. Any other image format
shouldn't care about it, they initialize everything properly themselves.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch improves the resilience of the load_vmstate() function, doing
further and better ordered tests.
In load_vmstate(), if there is any error on bdrv_snapshot_goto(), except if the
error is on VM state device, load_vmstate() will return zero and the VM will be
started with major corruption chances.
The current process:
- test if there is any writable device without snapshot support
- if exists return -error
- get the device that saves the VM state, possible return -error but unlikely
because it was tested earlier
- flush I/O
- run bdrv_snapshot_goto() on devices
- if fails, give an warning and goes to the next (not good!)
- if fails on the VM state device, return zero (not good!)
- check if the requested snapshot exists on the device that saves the VM state
and the state is not zero
- if fails return -error
- open the file with the VM state
- if fails return -error
- load the VM state
- if fails return -error
- return zero
New behavior:
- get the device that saves the VM state
- if fails return -error
- check if the requested snapshot exists on the device that saves the VM state
and the state is not zero
- if fails return -error
- test if there is any writable device without snapshot support
- if exists return -error
- test if the devices with snapshot support have the requested snapshot
- if anyone fails, return -error
- flush I/O
- run snapshot_goto() on devices
- if anyone fails, return -error
- open the file with the VM state
- if fails return -error
- load the VM state
- if fails return -error
- return zero
do_loadvm must not call vm_start if any error has occurred in load_vmstate.
Signed-off-by: Miguel Di Ciurcio Filho <miguel.filho@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
bdrv_commit copies the image to its backing file sector by sector, which
is (surprise!) relatively slow. Let's take a larger buffer and handle more
sectors at once if possible.
With a 1G qcow2 file, this brought the time bdrv_commit takes down from
5:06 min to 1:14 min for me.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The timer #0 is the system timer, so the timer #num_cpu is the
timer of the last CPU, and it must be initialized in slavio_timer_reset.
Don't mark non-existing timers as running.
Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Commit d167f9bc06 missed this one:
/src/qemu/ui/vnc-enc-tight.c:1483: warning: 'ret' may be used uninitialized in this function
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Commit 7bccf57383 missed this one:
/src/qemu/ui/vnc-enc-tight.c: In function 'send_sub_rect':
/src/qemu/ui/vnc-enc-tight.c:1527: warning: comparison is always true due to limited range of data type
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Add a missing #include statement to avoid a warning:
/src/qemu/net/tap-solaris.c: In function 'tap_open':
/src/qemu/net/tap-solaris.c:189: warning: implicit declaration of function 'error_report'
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This header is not present on my system and causes a build
failure, but is also not used in these files, so remove it.
Signed-off-by: Mike McCormack <mikem@ring3k.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
When a 'cont' is issued on a VM that's just waiting for an incoming
migration, the VM reboots and boots into the guest, possibly corrupting
its storage since it could be shared with another VM running elsewhere.
Ensure that a VM started with '-incoming' is only run when an incoming
migration successfully completes.
A new qerror, QERR_MIGRATION_EXPECTED, is added to signal that 'cont'
failed due to no incoming migration has been attempted yet.
Reported-by: Laine Stump <laine@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
We already set sockets to nonzero in the code above.
So this if statement always evaluates true. Remove it.
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
The variable len can get a negative return value from cvtnum,
which we check for, but which is impossible with the current
unsigned variable type. Currently the if(len < 0) check is
pointless. This patch fixes that.
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Removing dead code. Above we already continued when
rom->addr + valuegreaterthan0 < addr so this condition is always false.
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Forgot to check for and free these.
Found-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Currently virtio-serial supports a maximum of 31 ports. Specifying the
'max_ports' parameter to be > 31 on the cmd line causes badness.
Ensure we initialise virtio-serial only if max_ports is within the
supported range.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
* 'for-anthony' of git://repo.or.cz/qemu/kevin:
Fix -snapshot deleting images on disk change
block: Use error codes from lower levels for error message
block: default to 0 minimal / optiomal I/O size
move 'unsafe' to end of caching modes in help
virtio-blk: Create exit function to unregister savevm
block migration: propagate return value when bdrv_write() returns < 0
ide/atapi: add support for GET EVENT STATUS NOTIFICATION
Commit 68a1c81686 broke qemu on hosts not
using guest base. It uses reserved_va unconditionally in mmap.c. To
avoid to many #ifdef #endif blocks, define RESERVED_VA as either
reserved_va or 0ul, and use it instead of reserved_va, similarly to what
has been done with guest_base/GUEST_BASE.
Alex Williamson
Marcelo Tosatti
Amit Shah
Avi Kivity
Artyom Tarasenko
Blue Swirl
Stefan Weil
Cam Macdonell
Andreas Färber
Anthony Liguori
Edgar E. Iglesias
malc
Edgar E. Iglesias
Andrea Arcangeli
Markus Armbruster
Kevin Wolf
Yoshiaki Tamura
Miguel Di Ciurcio Filho
Hervé Poussineau
Edgar E. Iglesias
Mike McCormack
Isaku Yamahata
Joel Schopp
Aurelien Jarno
Richard Henderson