Currently, qemu-ga may die/get killed/go away for whatever reason after
guest-fsfreeze-freeze has been issued, and before guest-fsfreeze-thaw
has been issued. This means the only way to unfreeze the guest is via
VNC/network/console access, but obtaining that access after-the-fact can
often be very difficult when filesystems are frozen. Logins will almost
always hang, for instance. In many cases the only recourse would be to
reboot the guest without any quiescing of volatile state, which makes
this a corner-case worth giving some attention to.
A likely failsafe for this situation would be to use a watchdog to
restart qemu-ga if it goes away. There are some precautions qemu-ga
needs to take in order to avoid immediately hanging itself on I/O,
however, namely, we must disable logging and defer to processing/creation
of user-specific logfiles, along with creation of the pid file if we're
running as a daemon. We also need to disable non-fsfreeze-safe commands,
as we normally would when processing the guest-fsfreeze-freeze command.
To track when we need to do this in a way that persists between multiple
invocations of qemu-ga, we create a file on the guest filesystem before
issuing the fsfreeze, and delete it when doing the thaw. On qemu-ga
startup, we check for the existance of this file to determine
the need to take the above precautions.
We're forced to do it this way since a more traditional approach such as
reading/writing state to a dedicated state file will cause
access/modification time updates, respectively, both of which will hang
if the file resides on a frozen filesystem. Both can occur even if
relatime is enabled. Checking for file existence will not update the
access time, however, so it's a safe way to check for fsfreeze state.
An actual watchdog-based restart of qemu-ga can itself cause an access
time update that would thus hang the invocation of qemu-ga, but the
logic to workaround that can be handled via the watchdog, so we don't
address that here (for relatime we'd periodically touch the qemu-ga
binary if the file $qga_statedir/qga.state.isfrozen is not present, this
avoids qemu-ga updates or the 1 day relatime threshold causing an
access-time update if we try to respawn qemu-ga shortly after it goes
away)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Currently we rely on fsfreeze/thaw commands disabling/enabling logging
then having other commands check whether logging is disabled to avoid
executing if they aren't safe for running while a filesystem is frozen.
Instead, have an explicit whitelist of fsfreeze-safe commands, and
consolidate logging and command enablement/disablement into a pair
of helper functions: ga_set_frozen()/ga_unset_frozen()
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
guest-fsfreeze-thaw relies on state information obtained from
guest-fsfreeze-freeze to determine what filesystems to unfreeze.
This is unreliable due to the fact that that state does not account
for FIFREEZE being issued by other processes, or previous instances
of qemu-ga. This means in certain situations we cannot thaw
filesystems even with a responsive qemu-ga instance at our disposal.
This patch allows guest-fsfreeze-thaw to be issued unconditionally.
It also adds some additional logic to allow us to thaw filesystems
regardless of how many times the filesystem's "frozen" refcount has
been incremented by any guest processes.
Also, guest-fsfreeze-freeze now operates atomically: on success all
freezable filesystems are frozen, and on error all filesystems are
thawed. The ambiguous "GUEST_FSFREEZE_STATUS_ERROR" state is no
longer entered.
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Move code not dependent on mips_def_t from cpu_mips_init() into a
QOM initfn, as a start.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Embed CPUMIPSState as first member of QOM MIPSCPU.
Let CPUClass::reset() call cpu_state_reset() for now.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Move code from cpu_m68k_set_model() into model-specific initfns
and inline the remaining parts into cpu_m68k_init().
Let m68k_cpu_list() print CPU classes alphabetically except for "any".
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Laurent Vivier <Laurent@Vivier.EU>
Tested-by: Laurent Vivier <Laurent@Vivier.EU>
Embed CPUM68KState as first member of QOM M68kCPU.
Drop cpu_m68k_close() in favor of object_delete().
Let CPUClass::reset() call cpu_state_reset() for now.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Laurent Vivier <Laurent@Vivier.EU>
Tested-by: Laurent Vivier <Laurent@Vivier.EU>
Move code from cpu_state_reset() to QOM superh_cpu_reset().
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Embed CPUSH4State as first member of SuperHCPU.
Let CPUClass::reset() call cpu_state_reset() for now.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Patches are not being handled, so let's downgrade to Odd Fixes.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Aurélien Jarno <aurelien@aurel32.net>
m68k patches are not being handled, so let's downgrade to Odd Fixes.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Paul Brook <paul@codesourcery.com>
Speaker init has been added in 506b7ddf88,
but audio subsystem init was missing.
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Keep the PC values as defaults but allow to override them for PReP.
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
This fixes a crash in PReP emulation when using DMA controller to access
floppy drive.
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
This patch fixes a build regression with MinGW which was introduced by
commit 7c7db75576.
The 3rd argument of g_main_context_query must point to a gint value.
Using a pointer to an uint32_t value is wrong.
The timeout argument of function os_host_main_loop_wait was never
used for w32 / w64.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Fixes the build when combined with the drop of darwin-user.
Enthusiasts can still try building it using --enable-bsd-user.
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Cc: Bernhard Walle <bernhard@bwalle.de>
Tested-by: Bernhard Walle <bernhard@bwalle.de> [Mac OS 10.7.3]
Acked-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Based on the following Coccinelle patch:
@@
typedef int16, int_fast16_t;
@@
-int16
+int_fast16_t
Avoids a workaround for AIX.
Add typedef for pre-10 Solaris.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: malc <av1474@comtv.ru>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Based on the following Coccinelle patch:
@@
typedef uint16, uint_fast16_t;
@@
-uint16
+uint_fast16_t
Fixes the build of the Cocoa frontend on Mac OS X and avoids a
workaround for AIX.
For pre-10 Solaris include osdep.h.
Reported-by: Pavel Borzenkov <pavel.borzenkov@gmail.com>
Reported-by: Rui Carmo <rui.carmo@gmail.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: Juan Pineda <juan@logician.com>
Cc: malc <av1474@comtv.ru>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
osdep.h is included via qemu-common.h.
Prepares for use of [u]int_fast*_t types in softfloat code.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Cc: Ben Taylor <bentaylor.solx86@gmail.com>
Cc: Aurélien Jarno <aurelien@aurel32.net>
Cc: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
normalizeFloat{32,64}Subnormal() expect the exponent as int16, not int.
This went unnoticed since int16 and uint16 were both typedef'ed to int.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
* 'target-arm.for-upstream' of git://git.linaro.org/people/pmaydell/qemu-arm:
target-arm: Make SETEND respect bswap_code (BE8) setting
target-arm: Move A9 config_base_address reset value to ARMCPU
target-arm: Change cpu_arm_init() return type to ARMCPU
* 'timer' of git://qemu.weilnetz.de/qemu:
qemu-timer: Optimize data structures
qemu-timer: Remove function alarm_has_dynticks
qemu-timer: Use bool, false, true for boolean values
qemu-timer: Remove unused function qemu_alarm_pending
qemu-timer: Remove redundant include statements
* qmp/queue/qmp:
qapi: fix qmp_balloon() conversion
qemu-iotests: add block-stream speed value test case
block: add 'speed' optional parameter to block-stream
block: change block-job-set-speed argument from 'value' to 'speed'
block: use Error mechanism instead of -errno for block_job_set_speed()
block: use Error mechanism instead of -errno for block_job_create()
Commit d72f326431 forgot to convert a call from qerror_report() to
error_set(). Fix it.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Add tests to exercise the InvalidParameter 'speed' error code path, as
well as the regular success case for setting the speed. The
block-stream 'speed' parameter allows the speed limit of the job to be
applied immediately when the job starts instead of issuing a separate
block-job-set-speed command later. If the parameter has an invalid
value we expect to get an error and the job is not created.
It turns out that cancelling a block job is a common operation in these
test cases, let's extract a cancel_and_wait() function instead of
duplicating the QMP commands.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Allow streaming operations to be started with an initial speed limit.
This eliminates the window of time between starting streaming and
issuing block-job-set-speed. Users should use the new optional 'speed'
parameter instead so that speed limits are in effect immediately when
the job starts.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
There are at least two different errors that can occur in
block_job_set_speed(): the job might not support setting speeds or the
value might be invalid.
Use the Error mechanism to report the error where it occurs.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The block job API uses -errno return values internally and we convert
these to Error in the QMP functions. This is ugly because the Error
should be created at the point where we still have all the relevant
information. More importantly, it is hard to add new error cases to
this case since we quickly run out of -errno values without losing
information.
Go ahead and use Error directly and don't convert later.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Make the SETEND instruction respect the setting of bswap_code,
so that in BE8 mode we UNDEF for attempts to switch into
little-endian mode and nop for attempts to stay in big-endian
mode. (This is the inverse of the existing handling of SETEND
in the more common little-endian setup, which we use since
we don't implement the architecturally-mandated dynamic
endianness switching.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Move the A9 config_base_address cp15 register reset value to
ARMCPU. This should become a QOM property so that the Highbank
board can set it without having to pull in cpu-qom.h, but at
least this avoids the implicit dependency on reset ordering
that the previous workaround had.
Cc: Mark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Make cpu_arm_init() return a QOM ARMCPU, so that we don't need to
obtain an ARMCPU through arm_env_get_cpu() in machine init code.
This requires to adjust the inclusion site of cpu-qom.h and in turn,
forward-looking, to homogenize its include order.
cpu_init() must still return a CPUARMState for backwards and
cross-target compatibility, so adjust the cpu_init macro.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Remove all holes which were found by pahole on Linux x86_64
(and replace "struct QEMUTimer" by "QEMUTimer").
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Some time ago, the last time which did not have dynticks was removed,
so now all timers have dynticks.
I also removed a misleading error message for the dynticks timer.
If timer_create fails, there is already an error message, and
QEMU will use the unix timer which also provides dynamic ticks,
therefore dynamic ticks are not disabled.
v2:
Remove two if statements because they were always true
(thanks to Paolo Bonzini for this correction).
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
This avoids conversions between int and bool / char.
It also makes the code more readable.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
The last user of this function was removed by commit
12d4536f7d.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
qemu-timer.h includes qemu-common.h which already includes time.h,
sys/time.h, windows.h, unistd.h, fcntl.h, errno.h and signal.h.
Therefore those include statements are redundant and can be removed.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
* kraxel/usb.49:
usb-uhci: update irq line on reset
usb: add serial number generator
usb-redir: Not finding an async urb id is not an error
usb-redir: Reset device address and speed on disconnect
usb-redir: An interface count of 0 is a valid value
usb-xhci: fix bit test
usb-xhci: Use PCI DMA helper functions
usb-host: fix zero-length packets
usb-host: don't dereference invalid iovecs
usb-storage: fix request canceling
usb-ehci: Ensure frindex writes leave a valid frindex value
usb-ehci: add missing usb_packet_init() call
usb-ehci: remove hack
* mst/tags/for_anthony:
e1000: set E1000_ICR_INT_ASSERTED only for 8257x
e1000: link auto-negotiation emulation
e1000: introduce bit for debugging PHY emulation
e1000: introduce helpers to manipulate link status
e1000: PHY loopback mode support
e1000: conditionally raise irq at the end of MDI cycle
e1000: introduce bits of PHY control register
eepro100: Fix multicast regression
virtio: order index/descriptor reads
virtio: add missing mb() on enable notification
virtio: add missing mb() on notification
e1000: move reset function earlier in file
* afaerber/qom-cpu-x86-prop.v3:
target-i386: Introduce "tsc-frequency" property for X86CPU
target-i386: Prepare "vendor" property for X86CPU
target-i386: Introduce "xlevel" property for X86CPU
target-i386: Introduce "level" property for X86CPU
target-i386: Add property getter for CPU model-id
target-i386: Add property getter for CPU stepping
target-i386: Add property getter for CPU model
target-i386: Add property getter for CPU family
target-i386: Add "model-id" property to X86CPU
target-i386: Add "stepping" property to X86CPU
target-i386: Add "model" property to X86CPU
target-i386: Add "family" property to X86CPU
target-i386: Add range check for -cpu ,family=x
target-i386: Pass X86CPU to cpu_x86_register()
target-i386: Fix x86_cpuid_set_model_id()
Add an include for a header required to build on recent FreeBSD.
Signed-off-by: Nathan Whitehorn <nwhitehorn@freebsd.org>
Signed-off-by: Andreas Frber <andreas.faerber@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
