This will never happen right now (the assertion would fail). The
next patch will set the socket or pipe in non-blocking mode, thus
enabling this part of the code.
Coroutines can just stop whenever they want with qemu_coroutine_yield.
As soon as select tells the main loop that the migration stream is
readable, the coroutine is re-entered directly in qemu_get_buffer,
where it will read more data and pass it to the loading routines.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The common suffix now is process_incoming_migration+qemu_fclose.
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Now that qemu_fseek does not exist anymore, there is no reason to do
an fseek before fread/fwrite when operating on an stdio file.
Thus, unify the get/put_buffer callbacks used by qemu_fopen
with those used for pipes.
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add support for saving/loading bitmap.h bitmaps in vmstate.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Igor Mitsyanko <i.mitsyanko@samsung.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Move the error check to the beggining of the callers. Once this is fixed
qemu_file_set_if_error() is not used anymore, so remove it.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
It was setting last_error directly once, and with the helper the other time.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
It was used only one, and was only one if. It makes error handling
saner.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Adjust all the callers. We moved the set of last_error from inside
qemu_fflush() to all the callers.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
This patch cleans up return sentences in the end of void functions.
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
* agraf/ppc-for-upstream: (24 commits)
openpic: Added BRR1 register
pseries: Update SLOF firmware image
pseries dma: DMA window params added to PHB and DT population changed
pseries: Add PCI MSI/MSI-X support
pseries: Add trace event for PCI irqs
pseries: Export find_phb() utility function for PCI code
pseries: added allocator for a block of IRQs
pseries: Separate PCI RTAS setup from common from emulation specific PCI setup
pseries: Rework irq assignment to avoid carrying qemu_irqs around
pseries: Remove extraneous prints
pseries: Update SLOF
PPC: spapr: Remove global variable
PPC: spapr: Rework VGA select logic
xbzrle: fix compilation on ppc32
spapr: Add support for -vga option
Add one new file vga-pci.h and cleanup on all platforms
Revert "PPC: e500: Use new MPIC dt format"
ppc: Fix bug in handling of PAPR hypercall exits
PPC: e500: add generic e500 platform
PPC: e500: split mpc8544ds machine from generic e500 code
...
When compiling the xbzrle code on my ppc32 user space, I hit the following
gcc compiler warning (treated as an error):
cc1: warnings being treated as errors
savevm.c: In function ‘xbzrle_encode_buffer’:
savevm.c:2476: error: overflow in implicit constant conversion
Fix this by making the cast explicit, rather than implicit.
Signed-off-by: Alexander Graf <agraf@suse.de>
This patch converts all block layer close calls, that correspond
to qemu_open calls, to qemu_close.
Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
For performance we are encoding long word at a time.
For nzrun we use long-word-at-a-time NULL-detection tricks from strcmp():
using ((lword - 0x0101010101010101) & (~lword) & 0x8080808080808080) test
to find out if any byte in the long word is zero.
Signed-off-by: Benoit Hudzia <benoit.hudzia@sap.com>
Signed-off-by: Petter Svard <petters@cs.umu.se>
Signed-off-by: Aidan Shribman <aidan.shribman@sap.com>
Signed-off-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
We split it into 2 functions, foo_live_iterate, and foo_live_complete.
At this point, we only remove the bits that are for the other stage,
functionally this is equivalent to previous code.
Signed-off-by: Juan Quintela <quintela@redhat.com>
This patch splits stage 1 to its own function for both save_live
users, ram and block. It is just a copy of the function, removing the
parts of the other stages. Optimizations would came later.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Enable the creation of a method to tell migration if that section is
active and should be migrate. We use it for blk-migration, that is
normally not active. We don't create the method for RAM, as setups
without RAM are very strange O:-)
Signed-off-by: Juan Quintela <quintela@redhat.com>
Notice that the live migration users never unregister, so no problem
about freeing the ops structure.
Signed-off-by: Juan Quintela <quintela@redhat.com>
This allows to know how long each section takes to save.
An awk script like this tells us sections that takes more that 10ms
$1 ~ /savevm_state_iterate_end/ {
/* Print savevm_section_end line when > 10ms duration */
if ($2 > 10000) {
printf("%s times_missing=%u\n", $0, times_missing++);
}
}
Signed-off-by: Juan Quintela <quintela@redhat.com>
fix ws tracepoints
Signed-off-by: Juan Quintela <quintela@redhat.com>
* afaerber-or/qom-next-2: (22 commits)
qom: Push error reporting to object_property_find()
qdev: Remove qdev_prop_exists()
qbus: Initialize in standard way
qbus: Make child devices links
qdev: Connect busses with their parent devices
qdev: Convert busses to QEMU Object Model
qdev: Move SysBus initialization to sysbus.c
qdev: Use wrapper for qdev_get_path
qdev: Remove qdev_prop_set_defaults
qdev: Clean up global properties
qdev: Move bus properties to abstract superclasses
qdev: Move bus properties to a separate global
qdev: Push "type" property up to Object
arm_l2x0: Rename "type" property to "cache-type"
m48t59: Rename "type" property to "model"
qom: Assert that public types have a non-NULL parent field
qom: Drop type_register_static_alias() macro
qom: Make Object a type
qom: Add class_base_init
qom: Add object_child_foreach()
...
This makes it easier to remove it from BusInfo.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[AF: Drop now unnecessary NULL initialization in scsibus_get_dev_path()]
Signed-off-by: Andreas Färber <afaerber@suse.de>
Writing vm state uses bdrv_pwrite, so it will automatically get flushes
in writethrough mode. But doing a flush at the end in writeback mode
is probably a good idea anyway.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
tb.time is a time value, but not necessarily of the same size as time_t:
while time_t is 64 bit for w64, tb.time still is 32 bit only.
Therefore we need en explicit conversion.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
* sstabellini/saverestore-8:
xen: do not allocate RAM during INMIGRATE runstate
xen mapcache: check if memory region has moved.
xen: record physmap changes to xenstore
Set runstate to INMIGRATE earlier
Introduce "xen-save-devices-state"
cirrus_vga: do not reset videoram
Conflicts:
qapi-schema.json
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
- add an "is_ram" flag to SaveStateEntry;
- register_savevm_live sets is_ram for live_savevm devices;
- introduce a "xen-save-devices-state" QAPI command that can be used to save
the state of all devices, but not the RAM or the block devices of the
VM.
Changes in v8:
- rename save-devices-state to xen-save-devices-state.
Changes in v7:
- rename save_devices to save-devices-state.
Changes in v6:
- remove the is_ram parameter from register_savevm_live and sets is_ram
if the device is a live_savevm device;
- introduce save_devices as a QAPI command, write a better description
for it;
- fix CODING_STYLE;
- introduce a new doc to explain the save format used by save_devices.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
* qemu-kvm/memory/urgent: (42 commits)
memory: check for watchpoints when getting code ram_addr
exec: fix write tlb entry misused as iotlb
Sparc: avoid AREG0 wrappers for memory access helpers
Sparc: avoid AREG0 for memory access helpers
TCG: add 5 arg helpers to def-helper.h
softmmu templates: optionally pass CPUState to memory access functions
i386: Remove REGPARM
sparc64: implement PCI and ISA irqs
sparc: reset CPU state on reset
apb: use normal PCI device header for PBM device
w64: Fix data type of next_tb and tcg_qemu_tb_exec
softfloat: fix for C99
vmstate: fix varrays with uint32_t indexes
Fix large memory chunks allocation with tcg_malloc.
hw/pxa2xx.c: Fix handling of pxa2xx_i2c variable offset within region
hw/pxa2xx_lcd.c: drop target_phys_addr_t usage in device state
hw/pxa2xx_dma.c: drop target_phys_addr_t usage in device state
ARM: Remove unnecessary subpage workarounds
malta: Fix display for LED array
malta: Use symbolic hardware addresses
...
VMSTATE_VARRAY_UINT32() is used in hw/ds1225y.c, and we checked
VMS_VARRAY_UINT32 bit of field->flags in vmstate_load_state(),
but we don't check this bit in vmstate_save_state().
Signed-off-by: Amos Kong <akong@redhat.com>
Acked-by: Juan Quintela <quintela@redhat.com>
Acked-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The migrate command is one of those commands where HMP and QMP completely
mix up together. This made the conversion to the QAPI (which separates the
command into QMP and HMP parts) a bit difficult.
The first important change to be noticed is that this commit completes the
removal of the Monitor object from migration code, started by the previous
commit.
Another important and tricky change is about supporting the non-detached
mode. That is, if the user doesn't pass '-d' the migrate command will lock
the monitor and will only release it when migration is finished.
To support this in the new HMP command (hmp_migrate()), it is necessary
to create a timer which runs every second and checks if the migration is
still active. If it is, the timer callback will re-schedule itself to run
one second in the future. If the migration has already finished, the
monitor lock is released and the user can use it normally.
All these changes should be transparent to the user.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The Monitor object is passed back and forth within the migration/savevm
code so that it can print errors and progress to the user.
However, that approach assumes a HMP monitor, being completely invalid
in QMP.
This commit drops almost every single usage of the Monitor object, all
monitor_printf() calls have been converted into DPRINTF() ones.
There are a few remaining Monitor objects, those are going to be dropped
by the next commit.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
rom/device regions have a ram_addr that is composed of both an I/O handler
(low bits) and RAM region (high bits); but qemu_ram_set_idstr() expects just
a RAM region. Mask the I/O handler to make it happy.
Tested-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Currently creating a memory region automatically registers it for
live migration. This differs from other state (which is enumerated
in a VMStateDescription structure) and ties the live migration code
into the memory core.
Decouple the two by introducing a separate API, vmstate_register_ram(),
for registering a RAM block for migration. Currently the same
implementation is reused, but later it can be moved into a separate list,
and registrations can be moved to VMStateDescription blocks.
Signed-off-by: Avi Kivity <avi@redhat.com>
This is what qemu_fclose() expects.
Changes v1 -> v2:
- Add braces to if statement to match coding style
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This is what qemu_fclose() expects.
Changes v1 -> v2:
- On success, keep returning pclose() return value, instead of always 0.
Changes v2 -> v3:
- Add braces on if statements to match coding style
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This will make sure no error will be missed as long as callers always
check for qemu_fclose() return value. For reference, this is the
complete list of qemu_fclose() callers:
- exec_close(): already fixed to check for negative values, not -1
- migrate_fd_cleanup(): already fixed to consider only negative values
as error, not any non-zero value
- exec_accept_incoming_migration(): no return value check (yet)
- fd_accept_incoming_migration(): no return value check (yet)
- tcp_accept_incoming_migration(): no return value check (yet)
- unix_accept_incoming_migration(): no return value check (yet)
- do_savevm(): no return value check (yet)
- load_vmstate(): no return value check (yet)
Changes v1 -> v2:
- Add small comment about the need to return previously-spotted errors
Changes v2 -> v3:
- Add braces to "if" statements to match coding style
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Some code uses qemu_file_set_error() already, so use it everywhere
when setting last_error, for consistency.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Many places in QEMU call qemu_aio_flush() to complete all pending
asynchronous I/O. Most of these places actually want to drain all block
requests but there is no block layer API to do so.
This patch introduces the bdrv_drain_all() API to wait for requests
across all BlockDriverStates to complete. As a bonus we perform checks
after qemu_aio_wait() to ensure that requests really have finished.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
