New device, has never been released, so we can still improve things
without worrying about compatibility.
Naming is a mess. The code calls the device driver CirMemCharDriver,
the public API calls it "memory", "memchardev", or "memchar", and the
special commands are named like "memchar-FOO". "memory" is a
particularly unfortunate choice, because there's another character
device driver called MemoryDriver. Moreover, the device's distinctive
property is that it's a ring buffer, not that's in memory. Therefore:
* Rename CirMemCharDriver to RingBufCharDriver, and call the thing a
"ringbuf" in the API.
* Rename QMP and HMP commands from memchar-FOO to ringbuf-FOO.
* Rename device parameter from maxcapacity to size (simple words are
good for you).
* Clearly mark the parameter as optional in documentation.
* Fix error reporting so that chardev-add reports to current monitor,
not stderr.
* Replace cirmem in C identifiers by ringbuf.
* Rework documentation. Document the impact of our crappy UTF-8
handling on reading.
* QMP examples that even work.
I could split this up into multiple commits, but they'd change the
same documentation lines multiple times. Not worth it.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
The data returned has a well-defined size, which makes the size
returned along with it redundant at best. Drop it.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Command memchar-write takes data and size parameter. Begs the
question what happens when data doesn't match size.
With format base64, qmp_memchar_write() copies the full data argument,
regardless of size argument.
With format utf8, qmp_memchar_write() copies size bytes from data,
happily reading beyond data. Copies crap from the heap or even
crashes.
Drop the size parameter, and always copy the full data argument.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Currently, we are using 'tray_open' in QMP and 'tray-open' in
HMP. However, the QMP documentation was mistakenly using the
HMP version.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
# By Paolo Bonzini (14) and others
# Via Kevin Wolf
* kwolf/for-anthony: (24 commits)
ide: Add fall through annotations
block: Create proper size file for disk mirror
ahci: Add migration support
ahci: Change data types in preparation for migration
ahci: Remove unused AHCIDevice fields
hbitmap: add assertion on hbitmap_iter_init
mirror: do nothing on zero-sized disk
block/vdi: Check for bad signature
block/vdi: Improved return values from vdi_open
block/vdi: Improve debug output for signature
block: Use error code EMEDIUMTYPE for wrong format in some block drivers
block: Add special error code for wrong format
mirror: support arbitrarily-sized iterations
mirror: support more than one in-flight AIO operation
mirror: add buf-size argument to drive-mirror
mirror: switch mirror_iteration to AIO
mirror: allow customizing the granularity
block: allow customizing the granularity of the dirty bitmap
block: return count of dirty sectors, not chunks
mirror: perform COW if the cluster size is bigger than the granularity
...
This makes sense when the next commit starts using the extra buffer space
to perform many I/O operations asynchronously.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The desired granularity may be very different depending on the kind of
operation (e.g. continuous replication vs. collapse-to-raw) and whether
the VM is expected to perform lots of I/O while mirroring is in progress.
Allow the user to customize it, while providing a sane default so that
in general there will be no extra allocated space in the target compared
to the source.
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Next commit will re-enable balloon stats with a different interface, but
this old code conflicts with it. Let's drop it.
It's important to note that the QMP and HMP interfaces are also dropped
by this commit. That shouldn't be a problem though, because:
1. All QMP fields are optional
2. This feature has always been disabled
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The ptsname is returned directly, so there is no need to
use query-chardev to figure the pty device path.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Add chardev-add and chardev-remove qmp commands. Hotplugging
a null chardev is supported for now, more will be added later.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
* kwolf/for-anthony: (32 commits)
osdep: Less restrictive F_SEFL in qemu_dup_flags()
qemu-iotests: add testcases for mirroring on-source-error/on-target-error
qmp: add pull_event function
mirror: add support for on-source-error/on-target-error
iostatus: forward block_job_iostatus_reset to block job
qemu-iotests: add mirroring test case
mirror: implement completion
qmp: add drive-mirror command
mirror: introduce mirror job
block: introduce BLOCK_JOB_READY event
block: add block-job-complete
block: rename block_job_complete to block_job_completed
block: export dirty bitmap information in query-block
block: introduce new dirty bitmap functionality
block: add bdrv_open_backing_file
block: add bdrv_query_stats
block: add bdrv_query_info
qemu-config: Add new -add-fd command line option
monitor: Prevent removing fd from set during init
monitor: Enable adding an inherited fd to an fd set
...
Conflicts:
vl.c
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Error management is important for mirroring; otherwise, an error on the
target (even something as "innocent" as ENOSPC) requires to start again
with a full copy. Similar to on_read_error/on_write_error, two separate
knobs are provided for on_source_error (reads) and on_target_error (writes).
The default is 'report' for both.
The 'ignore' policy will leave the sector dirty, so that it will be
retried later. Thus, it will not cause corruption.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This adds the monitor commands that start the mirroring job.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
While streaming can be dropped as soon as it progressed through the whole
image, mirroring needs to be completed manually for two reasons: 1) so that
management knows exactly when the VM switches to the target; 2) because
for other use cases such as replication, we may leave the operation running
for the whole life of the virtual machine.
Add a new block job command that manually completes background operations.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Adding an NBD server inside QEMU is trivial, since all the logic is
in nbd.c and can be shared easily between qemu-nbd and QEMU itself.
The main difference is that qemu-nbd serves a single unnamed export,
while QEMU serves named exports.
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* sstabellini/xen-2012-10-03:
xen: Set the vram dirty when an error occur.
exec, memory: Call to xen_modified_memory.
exec: Introduce helper to set dirty flags.
xen: Introduce xen_modified_memory.
QMP, Introduce xen-set-global-dirty-log command.
qemu/xen: Add 64 bits big bar support on qemu
xen: Fix, no unplug of pt device by platform device.
* kwolf/for-anthony: (30 commits)
qemu-iotests: add tests for streaming error handling
qemu-iotests: map underscore to dash in QMP argument names
blkdebug: process all set_state rules in the old state
stream: add on-error argument
block: introduce block job error
iostatus: reorganize io error code
iostatus: change is_read to a bool
iostatus: move BlockdevOnError declaration to QAPI
iostatus: rename BlockErrorAction, BlockQMPEventAction
qemu-iotests: add test for pausing a streaming operation
qmp: add block-job-pause and block-job-resume
block: add support for job pause/resume
qmp: add 'busy' member to BlockJobInfo
block: add block_job_query
block: move job APIs to separate files
block: fix documentation of block_job_cancel_sync
qerror/block: introduce QERR_BLOCK_JOB_NOT_ACTIVE
qemu-iotests: add initial tests for live block commit
QAPI: add command for live block commit, 'block-commit'
block: helper function, to find the base image of a chain
...
This command is used during a migration of a guest under Xen. It calls
memory_global_dirty_log_start or memory_global_dirty_log_stop according to the
argument pass to the command.
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
This patch adds support for error management to streaming.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add QMP commands matching the functionality.
Paused jobs cannot be canceled without first resuming them. This
ensures that I/O errors are never missed by management. However, an
optional force argument can be specified to allow that.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The command for live block commit is added, which has the following
arguments:
device: the block device to perform the commit on (mandatory)
base: the base image to commit into; optional (if not specified,
it is the underlying original image)
top: the top image of the commit - all data from inside top down
to base will be committed into base (mandatory for now; see
note, below)
speed: maximum speed, in bytes/sec
Note: Eventually this command will support merging down the active layer,
but that code is not yet complete. If the active layer is passed
in as top, then an error will be returned. Once merging down the
active layer is supported, the 'top' argument may become optional,
and default to the active layer.
The is done as a block job, so upon completion a BLOCK_JOB_COMPLETED will
be emitted.
Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Also fixes a few issues while there:
1. The fd returned by monitor_get_fd() leaks in most error conditions
2. monitor_get_fd() return value is not checked. Best case we get
an error that is not correctly reported, worse case one of the
functions using the fd (with value of -1) will explode
3. A few error conditions aren't reported
4. We now "use up" @fdname always. Before, it was left alone for
invalid @protocol
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Convert 'sendkey' to use QAPI.
QAPI passes key's index of mapping table to qmp_send_key(),
not keycode. So we use help functions to convert key/code to
index of key_defs, and 'index' will be converted to 'keycode'
inside qmp_send_key().
For qmp, QAPI would check invalid key and raise error.
For hmp, invalid key is checked in hmp_send_key().
'send-key' of QMP doesn't support key in hexadecimal format.
Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Add a 'query-target' QAPI command to allow management applications
to determine what target architecture a QEMU binary is emulating
without having to parse the binary name or -help output
$ qmp-shell -p /tmp/qemu
(QEMU) query-target
{ u'return': { u'arch': u'x86_64' }}
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This patch adds support that enables passing of file descriptors
to the QEMU monitor where they will be stored in specified file
descriptor sets.
A file descriptor set can be used by a client like libvirt to
store file descriptors for the same file. This allows the
client to open a file with different access modes (O_RDWR,
O_WRONLY, O_RDONLY) and add/remove the passed fds to/from an fd
set as needed. This will allow QEMU to (in a later patch in this
series) "open" and "reopen" the same file by dup()ing the fd in
the fd set that corresponds to the file, where the fd has the
matching access mode flag that QEMU requests.
The new QMP commands are:
add-fd: Add a file descriptor to an fd set
remove-fd: Remove a file descriptor from an fd set
query-fdsets: Return information describing all fd sets
Note: These commands are not compatible with the existing getfd
and closefd QMP commands.
Signed-off-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qmp/queue/qmp: (48 commits)
target-ppc: add implementation of query-cpu-definitions (v2)
target-i386: add implementation of query-cpu-definitions (v2)
qapi: add query-cpu-definitions command (v2)
compiler: add macro for GCC weak symbols
qapi: add query-machines command
qapi: mark QOM commands stable
qmp: introduce device-list-properties command
qmp: add SUSPEND_DISK event
qmp: qmp-events.txt: add missing doc for the SUSPEND event
qmp: qmp-events.txt: put events in alphabetical order
qmp: emit the WAKEUP event when the guest is put to run
qmp: don't emit the RESET event on wakeup from S3
scripts: qapi-commands.py: qmp-commands.h: include qdict.h
docs: writing-qmp-commands.txt: update error section
error, qerror: drop QDict member
qerror: drop qerror_table and qerror_format()
error, qerror: pass desc string to error calls
error: drop error_get_qobject()/error_set_qobject()
qemu-ga: switch to the new error format on the wire
qmp: switch to the new error format on the wire
...
This command attempts to map to the behavior of -cpu ?. Unfortunately, the
output of this command differs wildly across targets.
To accommodate this, we use a weak symbol to implement a default version of the
command that fails with a QERR_NOT_SUPPORTED error code. Targets can then
override and implement this command if it makes sense for them.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This provides the same output as -M ? but in a structured way.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This can be used in conjunction with qom-list-types to determine the supported
set of devices and their parameters.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
IMPORTANT: this BREAKS QMP's compatibility for the error response.
This commit changes QMP's wire protocol to make use of the simpler
error format introduced by previous commits.
There are two important (and mostly incompatible) changes:
1. Almost all error classes have been replaced by GenericError. The
only classes that are still supported for compatibility with
libvirt are: CommandNotFound, DeviceNotActive, KVMMissingCap,
DeviceNotFound and MigrationExpected
2. The 'data' field of the error dictionary is gone
As an example, an error response like:
{ "error": { "class": "DeviceNotRemovable",
"data": { "device": "virtio0" },
"desc": "Device 'virtio0' is not removable" } }
Will now be emitted as:
{ "error": { "class": "GenericError",
"desc": "Device 'virtio0' is not removable" } }
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Change XBZRLE cache size in bytes (the size should be a power of 2, it will be
rounded down to the nearest power of 2).
If XBZRLE cache size is too small there will be many cache miss.
New query-migrate-cache-size QMP command and 'info migrate_cache_size' HMP
command to query cache value.
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>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The management can enable/disable a capability for the next migration by using
migrate-set-capabilities QMP command.
The user can use migrate_set_capability HMP command.
Signed-off-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
The management can query the current migration capabilities using
query-migrate-capabilities QMP command.
The user can use 'info migrate_capabilities' HMP command.
Currently only XBZRLE capability is available.
Signed-off-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Use the dedicated counting function in qmp_query_block in order to
propagate the backing file depth to HMP and add backing_file_depth
to qmp-commands.hx
Signed-off-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Sometimes it is neccessary for an application to determine
whether a particular QMP event is available, so they can
decide whether to use compatibility code instead. This
introduces a new 'query-events' command to QMP to do just
that
{ "execute": "query-events" }
{"return": [{"name": "WAKEUP"},
{"name": "SUSPEND"},
{"name": "DEVICE_TRAY_MOVED"},
{"name": "BLOCK_JOB_CANCELLED"},
{"name": "BLOCK_JOB_COMPLETED"},
...snip...
{"name": "SHUTDOWN"}]}
* monitor.c: Turn MonitorEvent -> string conversion
into a lookup from a static table of constant strings.
Add impl of qmp_query_events monitor command handler
* qapi-schema.json, qmp-commands.hx: Define contract of
query-events command
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This is not a full QAPI conversion, but an intermediate step.
In essence, do_netdev_add() is split into three functions:
1. netdev_add(): performs the actual work. This function is fully
converted to Error (thus, it's "qapi-friendly")
2. qmp_netdev_add(): the QMP front-end for netdev_add(). This is
coded by hand and not auto-generated (gen=no in the schema). The
reason for this it's a lot easier and simpler to with QemuOpts
this way
3. hmp_netdev_add(): HMP front-end.
This design was suggested by Paolo Bonzini.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-By: Laszlo Ersek <lersek@redhat.com>
The command's usage:
dump-guest-memory [-p] protocol [begin] [length]
The supported protocol can be file or fd:
1. file: the protocol starts with "file:", and the following string is
the file's path.
2. fd: the protocol starts with "fd:", and the following string is the
fd's name.
Note:
1. If you want to use gdb to process the core, please specify -p option.
The reason why the -p option is not default is:
a. guest machine in a catastrophic state can have corrupted memory,
which we cannot trust.
b. The guest machine can be in read-mode even if paging is enabled.
For example: the guest machine uses ACPI to sleep, and ACPI sleep
state goes in real-mode.
2. If you don't want to dump all guest's memory, please specify the start
physical address and the length.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.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>
The block streaming and job commands used '_' instead of '-' for reasons
of compatibility with libvirt, which already included support for the
'_' naming. However, the semantics of block_job_cancel have changed and
libvirt now needs to handle the new semantics.
Since the old semantics were never in a QEMU release we can still rename
the commands to use '-' instead of '_'. Libvirt is also happy because
the new name can be used to distinguish QEMU binaries that support the
latest block-job-cancel semantics from those that include a downstream
block_job_cancel command.
Therefore, let's apply the QAPI/QMP naming rules to the block streaming
and job commands. QEMU 1.1 will be the first release with these
commands so no upstream users can break.
Note that HMP commands are left with '_' because that is the convention
there.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
"O" is being used by the transaction and qom-set commands to mean "any
QObject", but it really means "do not validate the argument list".
Add a new specifier with the correct meaning.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
* 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>
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>
Simplify the blockdev-snapshot-sync code and gain failsafe operation
by turning it into a wrapper around the new transaction command. A new
option is also added matching "mode".
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The mode field lets a management application create the snapshot
destination outside QEMU.
Right now, the only modes are "existing" and "absolute-paths". Mirroring
introduces "no-backing-file". In the future "relative-paths" could be
implemented too.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We will add other kinds of operation. Prepare for this by adjusting
the schema.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This adds the QMP command for blockdev-group-snapshot-sync. It
takes an array in as the input, for the argument devlist. The
array consists of the following elements:
+ device: device to snapshot. e.g. "ide-hd0", "virtio0"
+ snapshot-file: path & file for the snapshot image. e.g. "/tmp/file.img"
+ format: snapshot format. e.g., "qcow2". Optional
There is no HMP equivalent for the command.
Signed-off-by: Jeff Cody <jcody@redhat.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This patch adds the system_wakeup monitor command which will simply
wake up suspended guests.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
With the acceptance of some new APIs to libspice-server.so it
is possible to add support for SPICE to the 'add_client'
monitor command, bringing parity with VNC. Since SPICE can
use TLS or plain connections, the command also gains a new
'tls' parameter to specify whether TLS should be attempted
on the injected client sockets.
This new feature is only enabled if building against a
libspice-server >= 0.10.1
* qmp-commands.hx: Add 'tls' parameter & missing doc for
'skipauth' parameter
* monitor.c: Wire up SPICE for 'add_client' command
* ui/qemu-spice.h, ui/spice-core.c: Add qemu_spice_display_add_client
API to wire up from monitor
[1] http://cgit.freedesktop.org/spice/spice/commit/server/spice.h?id=d55b68b6b44f2499278fa860fb47ff22f5011faahttp://cgit.freedesktop.org/spice/spice/commit/server/spice.h?id=bd07dde530d9504e1cfe7ed5837fc00c26f36716
Changes in v3:
- Added 'optional' flag to new parameters documented
- Added no-op impl of qemu_spice_display_add_client when
SPICE is disabled during build
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This adds a command that allows searching for types that implement a property.
This allows you to do things like search for all available PCIDevices. In the
future, we'll also have a standard interface for things with a BlockDriverState
property that a PCIDevice could implement.
This will enable search queries like, "any type that implements the BlockDevice
interface" which would allow management tools to present available block devices
without having to hard code device names. Since an object can implement
multiple interfaces, one device could act both as a BlockDevice and a
NetworkDevice.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Add query-block-jobs, which shows the progress of ongoing block device
operations.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add block_job_cancel, which stops an active block streaming operation.
When the operation has been cancelled the new BLOCK_JOB_CANCELLED event
is emitted.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add block_job_set_speed, which sets the maximum speed for a background
block operation.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add the block_stream command, which starts copy backing file contents
into the image file. Also add the BLOCK_JOB_COMPLETED QMP event which
is emitted when image streaming completes. Later patches add control
over the background copy speed, cancelation, and querying running
streaming operations.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
New QMP command to change the VNC password.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This allows clients to read and write device model properties through QMP. QAPI
doesn't support Visitor types yet and these commands are special in that they
don't work with fixed types.
I've added a documentation stub to qapi-schema.json so we can keep consistency
there.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Unfortunately, this conversion required an additional change.
In the old QMP command, the 'snapshot-file' argument is specified as
optional. The idea is to take the snapshot internally if 'snapshot-file'
is not passed. However, internal snapshots are not supported yet so
the command returns a MissingParamater error if 'snapshot-file' is not
passed. Which makes the argument actually required and will cause
compatibility breakage if we change that in the future.
To fix this the QAPI converted blockdev_snapshot_sync command makes the
'snapshot-file' argument required. Again, in practice it's actually required,
so this is not incompatible.
If we do implement internal snapshots someday, we'll need a new argument
for it.
Note that this discussion doesn't affect HMP.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Note that the command being dropped uses the deprecated MONITOR_CMD_ASYNC
API, but the new command is a regular synchronous command. There shouldn't
be visible differences though, as MONITOR_CMD_ASYNC is internal only.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Please, note that the QMP command has a new 'cpu-index' parameter.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Commit 5bc465e4b1 converted only
the HMP part of the system_powerdown command to the QAPI, this
commit completes it by converting the QMP part too.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This also fixes a bug with the old version: QMP would invert device id
and vendor id. This would look ok on HMP because it was printing
"device:vendor" instead of "vendor:device".
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Please, note that some of the code supporting memory statistics is
still around (eg. virtio_balloon_receive_stats() and reset_stats()).
Also, the qmp_query_balloon() function is synchronous and thus doesn't
make any use of the (not fully working) monitor's asynchronous command
support (the old non-qapi implementation did).
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
There are three important remarks in relation to the non-qapi command:
1. This commit also fixes the behavior of the 'query-vnc' and 'info vnc'
commands to return an error when qemu is built without VNC support
(ie. --disable-vnc). The non-qapi command would return the OK
response in QMP and no response in HMP
2. The qapi version explicitly marks the fields 'host', 'family',
'service' and 'auth' as optional. Their are not documented as optional
in the non-qapi command doc, but they would not be returned if
vnc support is disabled. The qapi version maintains the same
semantics, but documents those fields correctly
3. The 'clients' field, which is a list, is marked as optional but is
always returned. If there are no clients connected an empty list
is returned. This is not the Right Way to this in the qapi but it's
how the non-qapi command used to work
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
RHBZ 737921
Spice client is required to connect to the migration target before/as migration
starts. Since after migration starts, the target qemu is blocked and cannot accept new spice client
we trigger the connection to the target upon client_migrate_info command.
client_migrate_info completion cb will be called after spice client has been
connected to the target (or a timeout). See following patches and spice patches.
Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Contains the I/O status for the given device. The key is only present
if the device supports it and the VM is configured to stop on errors.
Please, check the documentation being added in this commit for more
information.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Please, note that the RunState type as defined in sysemu.h and its
runstate_as_string() function are being dropped in favor of the
RunState type generated by the QAPI.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
A simple example conversion 'info name'. This also adds the new files for
QMP and HMP.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This new key reports the current VM status to clients. Please, check
the documentation being added in this commit for more details.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Need to ask the device, so this requires new BlockDevOps member
is_tray_open().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Account the total latency for read/write/flush requests. This allows
management tools to average it based on a snapshot of the nr ops
counters and allow checking for SLAs or provide statistics.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Allow client connections for VNC and socket based character
devices to be passed in over the monitor using SCM_RIGHTS.
One intended usage scenario is to start QEMU with VNC on a
UNIX domain socket. An unprivileged user which cannot access
the UNIX domain socket, can then connect to QEMU's VNC server
by passing an open FD to libvirt, which passes it onto QEMU.
{ "execute": "get_fd", "arguments": { "fdname": "myclient" } }
{ "return": {} }
{ "execute": "add_client", "arguments": { "protocol": "vnc",
"fdname": "myclient",
"skipauth": true } }
{ "return": {} }
In this case 'protocol' can be 'vnc' or 'spice', or the name
of a character device (eg from -chardev id=XXXX)
The 'skipauth' parameter can be used to skip any configured
VNC authentication scheme, which is useful if the mgmt layer
talking to the monitor has already authenticated the client
in another way.
* console.h: Define 'vnc_display_add_client' method
* monitor.c: Implement 'client_add' command
* qemu-char.c, qemu-char.h: Add 'qemu_char_add_client' method
* qerror.c, qerror.h: Add QERR_ADD_CLIENT_FAILED
* qmp-commands.hx: Declare 'client_add' command
* ui/vnc.c: Implement 'vnc_display_add_client' method
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Add QMP bits for snapshot_blkdev command. This is the same as
snapshot_blkdev in the human monitor. The command is synchronous.
In the future async commands and or a break down of the functionality
into multiple commands might be added.
Also change the 'snapshot_file' argument to 'snapshot-file' in
the human monitor, so that it matches QMP.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@gmail.com>
This **CHANGES** the human monitor "nmi" command behavior.
Currently it accepts an CPU argument which, when provided, will send
the NMI to the specified CPU. This feature is of discussable value
though and HMP shouldn't have more features than QMP, so let's use
QMP's instead (it's also simpler).
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
inject-nmi command injects an NMI on all CPUs of guest.
It is only supported for x86 guest currently, it will
returns "Unsupported" error for non-x86 guest.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
query-block's specification documents response member "type" with
values "hd", "cdrom", "floppy", "unknown".
Its value is unreliable: a block device used as floppy has type
"floppy" if created with if=floppy, but type "hd" if created with
if=none.
That's because with if=none, the type is at best a declaration of
intent: the drive can be connected to any guest device. Its type is
really the guest device's business. Reporting it here is wrong.
No known user of QMP uses "type". It's unlikely that any unknown
users exist, because its value is useless unless you know how the
block device was created. But then you also know the true value.
Fixing the broken value risks breaking (hypothetical!) clients that
somehow rely on the current behavior. Not fixing the value risks
breaking (hypothetical!) clients that rely on the value to be
accurate. Can't entirely avoid hypothetical lossage. Change the
value to be always "unknown".
This makes "info block" always report "type=unknown". Pointless.
Change it to not report the type.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
client_migrate_info was put into qmp-commands.hx in the middle of
migrate_set_speed, between the command and it's description. In
addition client_migrate_info put the description before the command
itself, which is the wrong order.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Based on patch by Glauber Costa:
To allow management applications like libvirt to apply CPU affinities to
the VCPU threads, expose their ID via info cpus. This patch provides the
pre-existing and used interface from qemu-kvm.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Add a monitor command that allows resizing of block devices while
qemu is running. It uses the existing bdrv_truncate method already
used by qemu-img to do it's work. Compared to qemu-img the size
parsing is very simplicistic, but I think having a properly numering
object is more useful for non-humand monitor users than having
the units and relative resize parsing.
For SCSI devices the new size can be updated in Linux guests by
doing the following shell command:
echo > /sys/class/scsi_device/0:0:0:0/device/rescan
For ATA devices I don't know of a way to update the block device
size in Linux system, and for virtio-blk the next two patches
will provide an automatic update of the size when this command
is issued on the host.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Handle spice client migration, i.e. inform a spice client connected
about the new host and connection parameters, so it can move over the
connection automatically.
The monitor command has a not-yet used protocol argument simliar to
set_password and expire_password commands. This allows to add a simliar
feature to vnc in the future. Daniel Berrange plans to work on this.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
We used to ignore any fractional part in 0.13, but due to recent
changes (started with 9f9b17a4f0)
migrate_set_speed will reject the fractional part.
We don't expect existing clients to be relying on this, but we
need to update the documentation to reflect the change.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This patch adds new set_password and expire_password monitor commands
which allows to change and expire the password for spice and vnc
connections. See the doc update patch chunk for details.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The patch adds a 'query-spice' monitor command which returns
informations about the spice server configuration and also a list of
channel connections.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The args_type of migrate_set_speed in qmp-commands.hx is wrong.
When we set migrate speed by json, qemu will be core dumped.
This bug was caused by 07de3e60b0 and hence affects master only.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This command allows QMP clients to execute HMP commands.
Please, check the documentation added to the qmp-commands.hx file
for additional details about the interface and its limitations.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This file contains a copy of the following information from the
qemu-monitor.hx file:
o QObject handlers entries
o QMP documentation (all SQMP/EQMP sections)
Right now it's only used to generate the QMP docs in QMP/, but
next commits will turn this into QMP's command dispatch table.
It's important to note that QObject handlers entries are going
to get duplicated: they will exist in both QMP's and HMP's
dispatch tables.
This will be fixed in the near future, when we add a proper
QMP call interface and HMP is converted to use it. This way we
can completely drop QObject handlers entries from HMP's tables.
NOTE: HMP specific constructions, like "q|quit", have been dropped.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Markus Armbruster