In these functions I'm fixing here, we do call
qemuMonitorJSONCheckError() followed by another check if qemu
reply contains 'return' object. If it wouldn't, the former
CheckError() function would error out and the flow would not even
get to the latter.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Usually, the flow in this area of the code is as follows:
qemuMonitorJSONMakeCommand()
qemuMonitorJSONCommand()
qemuMonitorJSONCheckError()
parseReply()
But in this function, for some reasons, the last two steps were
swapped. This makes no sense.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
QEMU introduced the query-gic-capabilities QMP command
with commit 4468d4e0f383: use the command, if available,
to probe available GIC capabilities.
The information obtained is stored in a virQEMUCaps
instance, and will be later used to fill in a
virDomainCaps instance.
The event is emitted on ACPI OSPM Status Indication events.
ACPI standard documentation describes the method as:
This object is an optional control method that is invoked by OSPM to
indicate processing status to the platform. During device ejection,
device hot add, or other event processing, OSPM may need to perform
specific handshaking with the platform. OSPM may also need to indicate
to the platform its inability to complete a requested operation; for
example, when a user presses an ejection button for a device that is
currently in use or is otherwise currently incapable of being ejected.
In this case, the processing of the ACPI Eject Request notification by
OSPM fails. OSPM may indicate this failure to the platform through the
invocation of the _OST control method. As a result of the status
notification indicating ejection failure, the platform may take certain
action including reissuing the notification or perhaps turning on an
appropriate indicator light to signal the failure to the user.
qemu won't ever add those functions directly to QMP. They will be
replaced with 'blockdev-add' and 'blockdev-del' eventually. At this time
there's no need to keep the stubs around.
Additionally the drive_del stub in JSON contained dead code in the
attempt to report errors. (VIR_ERR_OPERATION_UNSUPPORTED was never
reported). Since the text impl does have the same message it is reported
anyways.
QEMU changed the error message to:
"Tray of device 'drive-sata0-0-1' is not open"
and they may change the error massage in the future.
This updates the code to not depend on the text from the error message
but only on error itself.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Migration enters "postcopy-active" state after QEMU switches to
post-copy and pauses guest CPUs. From libvirt's point of view this state
is similar to "completed" because we need to transfer guest execution to
the destination host.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This attribute is used to extend secondary PCI bar and expose it to the
guest as 64bit memory. It works like this: attribute vram is there to
set size of secondary PCI bar and guest sees it as 32bit memory,
attribute vram64 can extend this secondary PCI bar. If both attributes
are used, guest sees two memory bars, both address the same memory, with
the difference that the 32bit bar can address only the first part of the
whole memory.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1260749
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Extract out the qemuParseCommandLine{String|Pid} into their own
separate module - taking with it all the various static functions.
Causes a ripple effect with a few other modules to include the
new qemu_parse_command.h.
Narrowed down the list of #include's in the split out module to
those that are necessary for build.
memory_dirty_rate corresponds to dirty-pages-rate in QEMU and
memory_iteration is what QEMU reports in dirty-sync-count.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The structure actually contains migration statistics rather than just
the status as the name suggests. Renaming it as
qemuMonitorMigrationStats removes the confusion.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Commit 256496e1 introduced a detection if "is locked" in error replay
from qemu monitor. Commit c4073657 fixed a memory leak, but it was
pointed out by Peter, that this could be done cleaner without
stringifing the replay.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
The return value of virJSONValueToString() should be freed when
no longer needed. This is not the case after 256496e1.
==26902== 138 bytes in 2 blocks are definitely lost in loss record 1,051 of 1,239
==26902== at 0x4C29F80: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==26902== by 0xAA5F599: strdup (in /lib64/libc-2.21.so)
==26902== by 0x552BAD9: virStrdup (virstring.c:726)
==26902== by 0x54F60A7: virJSONValueToString (virjson.c:1790)
==26902== by 0x1DF6EBB9: qemuMonitorJSONEjectMedia (qemu_monitor_json.c:2225)
==26902== by 0x1DF57A4C: qemuMonitorEjectMedia (qemu_monitor.c:1985)
==26902== by 0x1DF1EF2D: qemuDomainChangeEjectableMedia (qemu_hotplug.c:199)
==26902== by 0x1DF90314: qemuDomainChangeDiskLive (qemu_driver.c:7985)
==26902== by 0x1DF90476: qemuDomainUpdateDeviceLive (qemu_driver.c:8030)
==26902== by 0x1DF91ED7: qemuDomainUpdateDeviceFlags (qemu_driver.c:8677)
==26902== by 0x561785F: virDomainUpdateDeviceFlags (libvirt-domain.c:8559)
==26902== by 0x134210: remoteDispatchDomainUpdateDeviceFlags (remote_dispatch.h:10966)
==26902== 106 bytes in 1 blocks are definitely lost in loss record 1,033 of 1,239
==26902== at 0x4C29F80: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==26902== by 0xAA5F599: strdup (in /lib64/libc-2.21.so)
==26902== by 0x552BAD9: virStrdup (virstring.c:726)
==26902== by 0x54F60A7: virJSONValueToString (virjson.c:1790)
==26902== by 0x1DF6EC0C: qemuMonitorJSONEjectMedia (qemu_monitor_json.c:2227)
==26902== by 0x1DF57A4C: qemuMonitorEjectMedia (qemu_monitor.c:1985)
==26902== by 0x1DF1EF2D: qemuDomainChangeEjectableMedia (qemu_hotplug.c:199)
==26902== by 0x1DF90314: qemuDomainChangeDiskLive (qemu_driver.c:7985)
==26902== by 0x1DF90476: qemuDomainUpdateDeviceLive (qemu_driver.c:8030)
==26902== by 0x1DF91ED7: qemuDomainUpdateDeviceFlags (qemu_driver.c:8677)
==26902== by 0x561785F: virDomainUpdateDeviceFlags (libvirt-domain.c:8559)
==26902== by 0x134210: remoteDispatchDomainUpdateDeviceFlags (remote_dispatch.h:10966)
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The internal representation of a JSON array counts the items in
size_t. However, for some reason, when asking for the count it's
reported as int. Firstly, we need the function to return a signed
type as it's returning -1 on an error. But, not every system has
integer the same size as size_t. Therefore, lets return ssize_t.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Few parts of the code looked at the current progress of and assumed that
a two phase blockjob is in the _READY state as soon as the progress
reached 100% (info.cur == info.end). In current versions of qemu this
assumption is invalid and qemu exposes a new flag 'ready' in the
query-block-jobs output that is set to true if the job is actually
finished.
This patch adds internal data handling for reading the 'ready' flag and
acting appropriately as long as the flag is present.
While this still doesn't fix the virsh client problem with two phase
block jobs and the --pivot option, it at least improves the error
message:
$ virsh blockcommit --wait --verbose vm vda --base vda[1] --active --pivot
Block commit: [100 %]error: failed to pivot job for disk vda
error: internal error: unable to execute QEMU command 'block-job-complete': The active block job for device 'drive-virtio-disk0' cannot be completed
to
$ virsh blockcommit --wait --verbose VM vda --base vda[1] --active --pivot
Block commit: [100 %]error: failed to pivot job for disk vda
error: block copy still active: disk 'vda' not ready for pivot yet
Modify the eject monitor functions to parse the return code and detect,
whether the error contains "is locked" to report this type of failure to
upper layers.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Spice events have mostly similar information present in the event JSON
but they differ in the name of the element containing the port.
The JSON event also provides connection ID which might be useful in the
future.
This patch splits up the event parser code into two functions and the
SPICE reimplements the event parsing with correct names and drops the
VNC only stuff.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1236585
Instead of using qemuMonitorJSONDevGetBlockExtent (which I plan to
remove later) extract the data in place.
Additionally add a flag that will be set when the wr_highest_offset was
extracted correctly so that callers can act according to that.
The test case addition should help make sure that everything works.
This patch provides support for a new watchdog action "inject-nmi" which
allows to define an inject of a non-maskable interrupt into a guest.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Daniel Hansel <daniel.hansel@linux.vnet.ibm.com>
Reviewed-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com>
Rather than grabbing an arbitrary JSON value and then checking
if it has the right type, we might as well request the correct
type to begin with.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONIOProcessEvent)
(qemuMonitorJSONCommandWithFd, qemuMonitorJSONHandleGraphics)
(qemuMonitorJSONGetStatus, qemuMonitorJSONExtractCPUInfo)
(qemuMonitorJSONGetVirtType, qemuMonitorJSONGetBalloonInfo)
(qemuMonitorJSONGetMemoryStats)
(qemuMonitorJSONDevGetBlockExtent)
(qemuMonitorJSONGetOneBlockStatsInfo)
(qemuMonitorJSONGetAllBlockStatsInfo)
(qemuMonitorJSONBlockStatsUpdateCapacityOne)
(qemuMonitorJSONBlockStatsUpdateCapacity)
(qemuMonitorJSONGetBlockExtent)
(qemuMonitorJSONGetMigrationStatusReply)
(qemuMonitorJSONGetDumpGuestMemoryCapability)
(qemuMonitorJSONAddFd, qemuMonitorJSONQueryRxFilterParse)
(qemuMonitorJSONExtractChardevInfo)
(qemuMonitorJSONDiskNameLookupOne)
(qemuMonitorJSONDiskNameLookup)
(qemuMonitorJSONGetAllBlockJobInfo)
(qemuMonitorJSONBlockIoThrottleInfo, qemuMonitorJSONGetVersion)
(qemuMonitorJSONGetMachines, qemuMonitorJSONGetCPUDefinitions)
(qemuMonitorJSONGetCommands, qemuMonitorJSONGetEvents)
(qemuMonitorJSONGetKVMState, qemuMonitorJSONGetObjectTypes)
(qemuMonitorJSONGetObjectListPaths)
(qemuMonitorJSONGetObjectProps, qemuMonitorJSONGetTargetArch)
(qemuMonitorJSONGetMigrationCapabilities)
(qemuMonitorJSONGetStringArray, qemuMonitorJSONAttachCharDev)
(qemuMonitorJSONGetCPUx86Data, qemuMonitorJSONGetIOThreads)
(qemuMonitorJSONGetMemoryDeviceInfo): Use shorter idioms.
Signed-off-by: Eric Blake <eblake@redhat.com>
QEMU_CAPS_SEAMLESS_MIGRATION capability says QEMU supports
SPICE_MIGRATE_COMPLETED event. Thus we can just drop all code which
polls query-spice and replace it with waiting for the event.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
"query-block-jobs" QMP command returns all running block jobs at once,
while qemuMonitorBlockJobInfo would only report one. This is not very
nice in case we need to check several block jobs. This patch refactors
the monitor code to always parse all block jobs and store them in a
hash.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
When traversing through the QOM tree, we're looking for
a link to a device, e.g.:
link<virtio-balloon-pci>
Introduce a helper that will format the link name at the start,
instead of doing it every time while recursing through the tree.
Rather than have a separate routine to parse the alias of an iothread
returned from qemu in order to get the iothread_id value, parse the alias
when returning and just return the iothread_id in qemuMonitorIOThreadInfoPtr
This set of patches removes the function, changes the "char *name" to
"unsigned int" and handles all the fallout.
qemuDomainBlockJobImpl become an unmaintainable mess over the years of
adding new stuff to it. This patch starts splitting up individual
functions from it until it can be killed entirely.
In bulk this will add lines of code rather than delete them but it will
be traded for maintainability.
My intention is to split qemuMonitorJSONBlockJob() into simpler separate
functions for every block job type. Since the error handling code is the
same for all block jobs, this patch extracts the code into a separate
function that will later be reused in more places.
With the new helper qemuMonitorJSONErrorIsClass we can save a few
function calls as we can extract the error object once.
Split out the function that checks the actual error class string into a
separate helper as it will be useful later and refactor
qemuMonitorJSONHasError to return bool type and remove few useless
checks.
Basically virJSONValueObjectHasKey are useless here since the next call
to virJSONValueObjectGet is checking the return value again (which can't
fail at that point). By removing the first check we save a function
call.
When using 'dimm' memory devices with qemu, some of the information
like the slot number and base address need to be reloaded from qemu
after process start so that it reflects the actual state. The state then
allows to use memory devices across migrations.
In qemu 2.3, the migration status will include 'cancelling' in the
window between when an asynchronous cancel has been requested and
when the migration is actually halted. Previously, qemu hid this
state and reported 'active'. Libvirt manages the sequence okay
even when the string is unrecognized (that is, it will report an
unknown state:
Migration: [ 69 %]^Cerror: internal error: unexpected migration status in cancelling.
but the migration is still cancelled), but recognizing the string
makes for a smoother user experience.
* src/qemu/qemu_monitor.h
(QEMU_MONITOR_MIGRATION_STATUS_CANCELLING): Add enum.
* src/qemu/qemu_monitor.c (qemuMonitorMigrationStatus): Map it.
* src/qemu/qemu_migration.c (qemuMigrationUpdateJobStatus): Adjust
clients.
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetMigrationStatusReply): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1199182 documents that
after a series of disk snapshots into existing destination images,
followed by active commits of the top image, it is possible for
qemu 2.2 and earlier to end up tracking a different name for the
image than what it would have had when opening the chain afresh.
That is, when starting with the chain 'a <- b <- c', the name
associated with 'b' is how it was spelled in the metadata of 'c',
but when starting with 'a', taking two snapshots into 'a <- b <- c',
then committing 'c' back into 'b', the name associated with 'b' is
now the name used when taking the first snapshot.
Sadly, older qemu doesn't know how to treat different spellings of
the same filename as identical files (it uses strcmp() instead of
checking for the same inode), which means libvirt's attempt to
commit an image using solely the names learned from qcow2 metadata
fails with a cryptic:
error: internal error: unable to execute QEMU command 'block-commit': Top image file /tmp/images/c/../b/b not found
even though the file exists. Trying to teach libvirt the rules on
which name qemu will expect is not worth the effort (besides, we'd
have to remember it across libvirtd restarts, and track whether a
file was opened via metadata or via snapshot creation for a given
qemu process); it is easier to just always directly ask qemu what
string it expects to see in the first place.
As a safety valve, we validate that any name returned by qemu
still maps to the same local file as we have tracked it, so that
a compromised qemu cannot accidentally cause us to act on an
incorrect file.
* src/qemu/qemu_monitor.h (qemuMonitorDiskNameLookup): New
prototype.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONDiskNameLookup):
Likewise.
* src/qemu/qemu_monitor.c (qemuMonitorDiskNameLookup): New function.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONDiskNameLookup)
(qemuMonitorJSONDiskNameLookupOne): Likewise.
* src/qemu/qemu_driver.c (qemuDomainBlockCommit)
(qemuDomainBlockJobImpl): Use it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Our virDomainBlockStatsFlags API uses the old approach where, when it's
called without the typed parameter array, returns the count of parameters
supported by qemu.
The supported parameter count is obtained via separate monitor calls
which is a waste since we can calculate it when gathering the data.
This patch adds code to the qemuMonitorGetAllBlockStatsInfo workers that
allows to track the count of supported fields reported by qemu and will
allow to remove the old duplicate code.
The function that is extracting block stats data from the QMP monitor
reply contains a lot of repeated code. Since I'd be changing each of the
copies in the next patch, lets convert it to a macro right away.
Allocate the hash table in the monitor wrapper function instead of the
worker itself so that the text monitor impl that will be added in the
next patch doesn't have to duplicate it.
QEMU internally updates the size of video memory if the domain XML had
provided too low memory size or there are some dependencies for a QXL
devices 'vgamem' and 'ram' size. We need to know about the changes and
store them into the status XML to not break migration or managedsave
through different libvirt versions.
The values would be loaded only if the "vgamem_mb" property exists for
the device. The presence of the "vgamem_mb" also tells that the
"ram_size" and "vram_size" exists for QXL devices.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
When requested in a later patch, the QMP command results are now
examined recursively. As qemu_driver will eventually have to
read items out of the hash table as stored by this patch, the
computation of backing alias string is done in a shared location.
* src/qemu/qemu_domain.h (qemuDomainStorageAlias): New prototype.
* src/qemu/qemu_domain.c (qemuDomainStorageAlias): Implement it.
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetOneBlockStatsInfo)
(qemuMonitorJSONBlockStatsUpdateCapacityOne): Perform recursion.
(qemuMonitorJSONGetAllBlockStatsInfo)
(qemuMonitorJSONBlockStatsUpdateCapacity): Update callers.
Signed-off-by: Eric Blake <eblake@redhat.com>
A future patch will allow recursion into backing chains when
collecting block stats. This patch should not change behavior,
but merely moves out the common code that will be reused once
recursion is enabled, and adds the parameter that will turn on
recursion.
* src/qemu/qemu_monitor.h (qemuMonitorGetAllBlockStatsInfo)
(qemuMonitorBlockStatsUpdateCapacity): Add recursion parameter,
although it is ignored for now.
* src/qemu/qemu_monitor.h (qemuMonitorGetAllBlockStatsInfo)
(qemuMonitorBlockStatsUpdateCapacity): Likewise.
* src/qemu/qemu_monitor_json.h
(qemuMonitorJSONGetAllBlockStatsInfo)
(qemuMonitorJSONBlockStatsUpdateCapacity): Likewise.
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetAllBlockStatsInfo)
(qemuMonitorJSONBlockStatsUpdateCapacity): Add parameter, and
split...
(qemuMonitorJSONGetOneBlockStatsInfo)
(qemuMonitorJSONBlockStatsUpdateCapacityOne): ...into helpers.
(qemuMonitorJSONGetBlockStatsInfo): Update caller.
* src/qemu/qemu_driver.c (qemuDomainGetStatsBlock): Update caller.
* src/qemu/qemu_migration.c (qemuMigrationCookieAddNBD): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
The function queries the block devices visible to qemu
('query-block') and parses the qemu's output. The info is
returned in a hash table which is expected to be pre-filled by
qemuMonitorJSONGetAllBlockStatsInfo(). However, in the next patch
we are not going to call the latter function at all, so we should
make the former function add devices into the hash table if not
found there.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Improve the monitor function to also retrieve the guest state of
character device (if provided) so that we can refresh the state of
virtio-serial channels and perhaps react to changes in the state in
future patches.
This patch changes the returned data from qemuMonitorGetChardevInfo to
return a structure containing the pty path and the state for all the
character devices.
The change to the testsuite makes sure that the data is parsed
correctly.
New qemu added a new event that is emitted when a virtio serial channel
is opened in the guest OS. This allows us to update the state of the
port in the output-only XML element.
This patch implements the monitor callbacks and necessary handlers to
update the state in the definition.
To unify future additions that require information from "query-chardev"
rename qemuMonitorGetPtyPaths and friends to qemuMonitorGetChardevInfo
and move the allocation of the returned hash into the top level
function.
We used to set migration capabilities only when a user asked for them in
flags. This is fine when migration succeeds since the QEMU process is
killed in the end but in case migration fails or if it's cancelled, some
capabilities may remain turned on with no way to turn them off. To fix
that, migration capabilities have to be turned on if requested but
explicitly turned off in case they were not requested but QEMU supports
them.
https://bugzilla.redhat.com/show_bug.cgi?id=1163953
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Use the device type name if we know it instead of its number,
even if we can't hotplug it:
qemuMonitorJSONAttachCharDevCommand:6094 : operation failed: Unsupported
char device type '10'
Detect if the the qemu binary currently in use support the bps_max option,
If yes add it to the command, if not, just ignore the option.
We don't print error here, because the check for invalide arguments
has alerady been made in qemu_driver.c
Signed-off-by: Matthias Gatto <matthias.gatto@outscale.com>
Add support for bps_max and friends in the driver part.
In the part checking if a qemu is running, check if the running binary
support bps_max, if not print an error message, if yes add it to
"info" variable
Signed-off-by: Matthias Gatto <matthias.gatto@outscale.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
To allow live modification of device backends in qemu libvirt needs to
be able to hot-add/remove "objects". Add monitor backend functions to
allow this.
This function will be used for hot-add/remove of RNG backends,
IOThreads, memory backing objects, etc.
Our qemu monitor code has a converter from key-value pairs to a json
value object. I want to re-use the code later and having it part of the
monitor command generator is inflexible. Split it out into a separate
helper.
NIC_RX_FILTER_CHANGED is sent by qemu any time a NIC driver in the
guest modified the NIC's RX Filter (for example, if the MAC address of
the NIC is changed by the guest).
This patch doesn't do anything useful with that event; it just sets up
all the plumbing to get news of the event into a worker thread with
all proper locking/reference counting, and provide an easy place to
add in desired functionality.
See src/qemu/EVENTHANDLERS.txt for information/instructions on adding
a libvirt-internal handler for a qemu event (using
NIC_RX_FILTER_CHANGED as an example).
This function can be called at any time to get the current status of a
guest's network device rx-filter. In particular it is useful to call
after libvirt recieves a NIC_RX_FILTER_CHANGED event - this event only
tells you that something has changed in the rx-filter, the details are
retrieved with the query-rx-filter monitor command (only available in
the json monitor). The command sent to the qemu monitor looks like this:
{"execute":"query-rx-filter", "arguments": {"name":"net2"} }'
and the results will look something like this:
{
"return": [
{
"promiscuous": false,
"name": "net2",
"main-mac": "52:54:00:98:2d:e3",
"unicast": "normal",
"vlan": "normal",
"vlan-table": [
42,
0
],
"unicast-table": [
],
"multicast": "normal",
"multicast-overflow": false,
"unicast-overflow": false,
"multicast-table": [
"33:33:ff:98:2d:e3",
"01:80:c2:00:00:21",
"01:00:5e:00:00:fb",
"33:33:ff:98:2d:e2",
"01:00:5e:00:00:01",
"33:33:00:00:00:01"
],
"broadcast-allowed": false
}
],
"id": "libvirt-14"
}
This is all parsed from JSON into a virNetDevRxFilter object for
easier consumption. (unicast-table is usually empty, but is also an
array of mac addresses similar to multicast-table).
(NB: LIBNL_CFLAGS was added to tests/Makefile.am because virnetdev.h
now includes util/virnetlink.h, which includes netlink/msg.h when
appropriate. Without LIBNL_CFLAGS, gcc can't find that file (if
libnl/netlink isn't available, LIBNL_CFLAGS will be empty and
virnetlink.h won't try to include netlink/msg.h anyway).)
Aeons ago (commit 34dcbbb4, v0.8.2), we added a new libvirt event
(VIR_DOMAIN_EVENT_ID_IO_ERROR_REASON) in order to tell the user WHY
the guest halted. This is because at least VDSM wants to react
differently to ENOSPC events (resize the lvm partition to be larger,
and resume the guest as if nothing had happened) from all other events
(I/O is hosed, throw up our hands and flag things as broken). At the
time this was done, downstream RHEL qemu added a vendor extension
'__com.redhat_reason', which would be exactly one of these strings:
"enospc", "eperm", "eio", and "eother". In our stupidity, we exposed
those exact strings to clients, rather than an enum, and we also
return "" if we did not have access to a reason (which was the case
for upstream qemu).
Fast forward to now: upstream qemu commit c7c2ff0c (will be qemu 2.2)
FINALLY adds a 'nospace' boolean, after discussion with multiple
projects determined that VDSM really doesn't care about distinction
between any other error types. So this patch converts 'nospace' into
the string "enospc" for compatibility with RHEL clients that were
already used to the downstream extension, while leaving the reason
blank for all other cases (no change from the status quo).
See also https://bugzilla.redhat.com/show_bug.cgi?id=1119784
* src/qemu/qemu_monitor_json.c (qewmuMonitorJSONHandleIOError):
Parse reason field from modern qemu.
* include/libvirt/libvirt.h.in
(virConnectDomainEventIOErrorReasonCallback): Document it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Management software wants to be able to allocate disk space on demand.
To support this they need keep track of the space occupation of the
block device. This information is reported by qemu as part of block
stats.
This patch extend the block information in the bulk stats with the
allocation information.
To keep the same behaviour a helper is extracted from
qemuMonitorJSONGetBlockExtent in order to get per-device allocation
information.
Signed-off-by: Francesco Romani <fromani@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
While our code gathers block stats via "query-blockstats" some
information need to be gathered via "query-block". Add a helper function
that will update the blockstats structure if requested.
The current block stats code matched up the disk name with the actual
stats by the order in the data returned from qemu. This unfortunately
isn't right as qemu may return the disks in any order. Fix this by
returning a hash of stats and index them by the disk alias.
RDMA migration uses the 'setup' state in QEMU to optionally lock
all memory before the migration starts. The total time spent in
this state is exposed as VIR_DOMAIN_JOB_SETUP_TIME.
Additionally, QEMU also exports migration throughput (mbps) for both
memory and disk, so let's add them too: VIR_DOMAIN_JOB_MEMORY_BPS,
VIR_DOMAIN_JOB_DISK_BPS.
Signed-off-by: Michael R. Hines <mrhines@us.ibm.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This patch implements the VIR_DOMAIN_STATS_BLOCK group of statistics.
To do so, a helper function to get the block stats of all the disks of
a domain is added.
Signed-off-by: Francesco Romani <fromani@redhat.com>
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Upstream qemu 1.4 added some drive-mirror tunables not present
when it was first introduced in 1.3. Management apps may want
to set these in some cases (for example, without tuning
granularity down to sector size, a copy may end up occupying
more bytes than the original because an entire cluster is
copied even when only a sector within the cluster is dirty,
although tuning it down results in more CPU time to do the
copy). I haven't personally needed to use the parameters, but
since they exist, and since the new API supports virTypedParams,
we might as well expose them.
Since the tuning parameters aren't often used, and omitted from
the QMP command when unspecified, I think it is safe to rely on
qemu 1.3 to issue an error about them being unsupported, rather
than trying to create a new capability bit in libvirt.
Meanwhile, all versions of qemu from 1.4 to 2.1 have a bug where
a bad granularity (such as non-power-of-2) gives a poor message:
error: internal error: unable to execute QEMU command 'drive-mirror': Invalid parameter 'drive-virtio-disk0'
because of abuse of QERR_INVALID_PARAMETER (which is supposed to
name the parameter that was given a bad value, rather than the
value passed to some other parameter). I don't see that a
capability check will help, so we'll just live with it (and it
has since been improved in upstream qemu).
* src/qemu/qemu_monitor.h (qemuMonitorDriveMirror): Add
parameters.
* src/qemu/qemu_monitor.c (qemuMonitorDriveMirror): Likewise.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONDriveMirror):
Likewise.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONDriveMirror):
Likewise.
* src/qemu/qemu_driver.c (qemuDomainBlockCopyCommon): Likewise.
(qemuDomainBlockRebase, qemuDomainBlockCopy): Adjust callers.
* src/qemu/qemu_migration.c (qemuMigrationDriveMirror): Likewise.
* tests/qemumonitorjsontest.c (qemuMonitorJSONDriveMirror): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
If the virJSONValueNewObject() fails, then rather than going to error
and getting a Coverity false positive since it doesn't seem to understand
the relationship between nkeywords, keywords, and values and seems to
believe calling qemuFreeKeywords will cause a NULL deref - just return NULL
Signed-off-by: John Ferlan <jferlan@redhat.com>
virDomainGetJobStats gains new VIR_DOMAIN_JOB_STATS_COMPLETED flag that
can be used to fetch statistics of a completed job rather than a
currently running job.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
While reviewing the new virDomainBlockCopy API, Peter Krempa
pointed out that our existing design of using MiB/s for block
job bandwidth is rather coarse, especially since qemu tracks
it in bytes/s; so virDomainBlockCopy only accepts bytes/s.
But once the new API is implemented for qemu, we will be in
the situation where it is possible to set a value that cannot
be accurately reflected back to the user, because the existing
virDomainGetBlockJobInfo defaults to the coarser units.
Fortunately, we have an escape hatch; and one that has already
served us well in the past: we can use the flags argument to
specify which scale to use (see virDomainBlockResize for prior
art). This patch fixes the query side of the API; made easier
by previous patches that split the query side out from the
modification code. Later patches will address the virsh
interface, as well retrofitting all other blockjob APIs to
also accept a flag for toggling bandwidth units.
* include/libvirt/libvirt.h.in (_virDomainBlockJobInfo)
(VIR_DOMAIN_BLOCK_COPY_BANDWIDTH): Document sizing issues.
(virDomainBlockJobInfoFlags): New enum.
* src/libvirt.c (virDomainGetBlockJobInfo): Document new flag.
* src/qemu/qemu_monitor.h (qemuMonitorBlockJobInfo): Add parameter.
* src/qemu/qemu_monitor.c (qemuMonitorBlockJobInfo): Likewise.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONBlockJobInfo):
Likewise.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONBlockJobInfo)
(qemuMonitorJSONGetBlockJobInfoOne): Likewise. Don't scale here.
* src/qemu/qemu_migration.c (qemuMigrationDriveMirror): Update
callers.
* src/qemu/qemu_driver.c (qemuDomainBlockPivot)
(qemuDomainBlockJobImpl): Likewise.
(qemuDomainGetBlockJobInfo): Likewise, and support new flag.
Signed-off-by: Eric Blake <eblake@redhat.com>
The previous patch hoisted some bounds checks to the callers;
but someone that is not aware of the hoisted check could now
try passing an integer between LLONG_MAX and ULLONG_MAX. As a
safety measure, add new json conversion modes that let libvirt
error out early instead of pass bad numbers to qemu, if the
caller ever makes a mistake due to later refactoring.
Convert the various blockjob QMP calls to use the new modes,
and switch some of them to be optional (QMP has always supported
an omitted "speed" the same as "speed":0, for everything except
block-job-set-speed).
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONMakeCommandRaw):
Add 'j'/'y' and 'J'/'Y' to error out on negative input.
(qemuMonitorJSONDriveMirror, qemuMonitorJSONBlockCommit)
(qemuMonitorJSONBlockJob): Use it.
Signed-off-by: Eric Blake <eblake@redhat.com>
Another layer of overly-multiplexed code that deserves to be
split into obviously separate paths for query vs. modify.
This continues the cleanup started in commit cefe0ba.
In the process, make some tweaks to simplify the logic when
parsing the JSON reply. There should be no user-visible
semantic changes.
* src/qemu/qemu_monitor.h (qemuMonitorBlockJob): Drop parameter.
(qemuMonitorBlockJobInfo): New prototype.
(BLOCK_JOB_INFO): Drop enum.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONBlockJob)
(qemuMonitorJSONBlockJobInfo): Likewise.
* src/qemu/qemu_monitor.c (qemuMonitorBlockJob): Split...
(qemuMonitorBlockJobInfo): ...into second function.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONBlockJob): Move
block info portions...
(qemuMonitorJSONGetBlockJobInfo): ...here, and rename...
(qemuMonitorJSONBlockJobInfo): ...and export.
(qemuMonitorJSONGetBlockJobInfoOne): Alter return semantics.
* src/qemu/qemu_driver.c (qemuDomainBlockPivot)
(qemuDomainBlockJobImpl, qemuDomainGetBlockJobInfo): Adjust
callers.
* src/qemu/qemu_migration.c (qemuMigrationDriveMirror)
(qemuMigrationCancelDriveMirror): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1103245
An advice appeared there on the qemu-devel list [1]. When a domain is
suspended and then resumed guest kernel is not aware of this. So we've
introduced virDomainSetTime API that resets the time within guest
using qemu-ga. On the other hand, qemu itself is trying to make RTC
beat faster to catch the difference. But if we don't tell qemu that
guest's time was reset via the other method, both mechanisms are
applied resulting in again wrong guest time. In order to avoid summing
both corrections we need to tell qemu that it should not use the RTC
injection if the guest time is set via guest agent.
1: http://www.mail-archive.com/qemu-devel@nongnu.org/msg236435.html
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
That can be lately achieved with by having .param == NULL in the
virQEMUCapsCommandLineProps struct.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
To allow changing the name that is recorded in the top of the current
image chain used in a block pull/rebase operation, we need to specify
the backing name to qemu. This is done via the "backing-file" attribute
to the block-stream commad.
To allow changing the name that is recorded in the overlay of the TOP
image used in a block commit operation, we need to specify the backing
name to qemu. This is done via the "backing-file" attribute to the
block-commit command.
We are about to turn on support for active block commit. Although
qemu 2.0 was the first version to mostly support it, that version
mis-handles 0-length files, and doesn't have anything available for
easy probing. But qemu 2.1 fixed bugs, and made life simpler by
letting the 'top' argument be optional. Unless someone begs for
active commit with qemu 2.0, for now we are just going to enable
it only by probing for qemu 2.1 behavior (anyone backporting active
commit can also backport the optional argument behavior). This
requires qemu.git commit 7676e2c597000eff3a7233b40cca768b358f9bc9.
Although all our actual uses of block-commit supply arguments for
both base and top, we can omit both arguments and use a bogus
device string to trigger an interesting behavior in qemu. All QMP
commands first do argument validation, failing with GenericError
if a mandatory argument is missing. Once that passes, the code
in the specific command gets to do further checking, and the qemu
developers made sure that if device is the only supplied argument,
then the block-commit code will look up the device first, with a
failure of DeviceNotFound, before attempting any further argument
validation (most other validations fail with GenericError). Thus,
the category of error class can reliably be used to decipher
whether the top argument was optional, which in turn implies a
working active commit. Since we expect our bogus device string to
trigger an error either way, the code is written to return a
distinct return value without spamming the logs.
* src/qemu/qemu_monitor.h (qemuMonitorSupportsActiveCommit): New
prototype.
* src/qemu/qemu_monitor.c (qemuMonitorSupportsActiveCommit):
Implement it.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONBlockCommit):
Allow NULL for top and base, for probing purposes.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONBlockCommit):
Likewise, implementing the probe.
* tests/qemumonitorjsontest.c (mymain): Enable...
(testQemuMonitorJSONqemuMonitorSupportsActiveCommit): ...a new test.
Signed-off-by: Eric Blake <eblake@redhat.com>
qemuMonitorJSONSendKey declares the "holdtime" argument as unsigned int
while the command was constructed in qemuMonitorJSONMakeCommand using
the "P" modifier which took a unsigned long from the variable
arguments which then made it possible to access uninitialized memory.
This broke the qemumonitorjsontest on 32bit fedora 20:
64) qemuMonitorJSONSendKey
... libvirt: QEMU Driver error : internal error: unsupported data type 'W' for arg 'WVSì D$0èwÿÿÃAå' FAILED
Uncovered by upstream commit f744b831c6.
Additionally add test for the hold-time option.
This patch adds option to specify that a json qemu command argument is
optional without the need to use if's or ternary operators to pass the
list. Additionally all the modifier characters are documented to avoid
user confusion.
In "src/conf/domain_conf.h" there are many enum declarations. The
cleanup in this header filer was started, but it wasn't enough and
there are many other files that has enum variables declared. So, the
commit was starting to be big. This commit finish the cleanup in this
header file and in other files that has enum variables, parameters,
or functions declared.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
If virDomainMemoryStats is called too soon after domain startup,
QEMU returns:
"error":{"class":"GenericError","desc":"guest hasn't updated any stats yet"}
when we try to query balloon stats.
Check for this reply and log it as OPERATION_INVALID instead of
INTERNAL_ERROR. This means the daemon only logs it at the debug level,
without polluting system logs.
Reported by Laszlo Pal:
https://www.redhat.com/archives/libvirt-users/2014-May/msg00023.html
nmdm is a FreeBSD driver which allows to create a pair of tty
devices one of which is passed to the guest and second is used
by the client.
This patch adds new 'nmdm' character device type. Its definition
looks this way:
<serial type='nmdm'>
<source master='/dev/nmdm0A' slave='/dev/nmdm0B'/>
</serial>
Master is passed to the hypervisior and slave is used for client
connection.
Also implement domainOpenConsole() for bhyve driver based on that.
This patch adds qemuMonitorGetDumpGuestMemoryCapability, which is used to check
whether the specified dump-guest-memory format is supported by qemu.
Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com>
Wire up all the pieces to send arbitrary qemu events to a
client using libvirt-qemu.so. If the extra bookkeeping of
generating event objects even when no one is listening turns
out to be noticeable, we can try to further optimize things
by adding a counter for how many connections are using events,
and only dump events when the counter is non-zero; but for
now, I didn't think it was worth the code complexity.
* src/qemu/qemu_driver.c
(qemuConnectDomainQemuMonitorEventRegister)
(qemuConnectDomainQemuMonitorEventDeregister): New functions.
* src/qemu/qemu_monitor.h (qemuMonitorEmitEvent): New prototype.
(qemuMonitorDomainEventCallback): New typedef.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONIOProcessEvent):
Report events.
* src/qemu/qemu_monitor.c (qemuMonitorEmitEvent): New function, to
pass events through.
* src/qemu/qemu_process.c (qemuProcessHandleEvent): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
Any source file which calls the logging APIs now needs
to have a VIR_LOG_INIT("source.name") declaration at
the start of the file. This provides a static variable
of the virLogSource type.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The dtrace probe macros rely on the logging API. We can't make
the internal.h header include the virlog.h header though since
that'd be a circular include. Instead simply split the dtrace
probes into their own header file, since there's no compelling
reason for them to be in the main internal.h header.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
While investigating https://bugzilla.redhat.com/show_bug.cgi?id=1061827
I noticed that we pass user input unscathed for block-pull, but
always pass a canonical absolute name through for block-commit.
[Note that we probably _ought_ to validate that the user's request
for block-pull actually matches the backing chain, the way we already
do for block-commit - but that's a separate issue. Further note that
the ability to pass user input through unscathed allows backdoors
such as specifying a backing image that is a network URI such as
a gluster disk, instead of forcing things to the local file system;
which is an area still under active investigation on whether libvirt
needs to behave differently for network disks.]
Since qemu may write the name that the user passed in as the backing
file, a user may have a reason to want a relative file name passed
through to qemu, and always munging things to absolute prevents that.
Put another way, if you have the backing chain:
[A] <- [B(back=./A)] <- [C(back=./B)]
and commit B into A (virsh blockcommit $dom vda --base A --top B),
the metadata of C will have to be re-written. But should it be
rewritten as [C(back=./A)] or as [C(back=/path/to/A)]? Still up in
the air is whether qemu's decision should be based on whether B
and/or C had relative paths, or on whether the --base and/or
--top arguments to the command were relative paths; but if we always
pass a canonical name, we've prevented the spelling of the command
arguments from being part of the hueristics that qemu uses.
I also audited the code, and verified that we never call
qemuMonitorBlockCommit() with a NULL base, either before or after
the change to qemu_driver.c.
* src/qemu/qemu_driver.c (qemuDomainBlockCommit): Preserve user's
spelling, since absolute vs. relative matters to qemu.
* src/qemu/qemu_monitor.h (qemuMonitorBlockCommit): Base is never
null.
* src/qemu/qemu_monitor.c (qemuMonitorBlockCommit): Likewise.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONBlockCommit):
Likewise.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONBlockCommit):
Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
The qemuMonitorJSONBlockJob handles a few errors internally. If qemu
returns a different error we would report a rather unhelpful message:
$ virsh blockpull gluster-job vda --base /dev/null
error: internal error: Unexpected error
As the actual message from qemu contains a bit more info, let's use it
to report something a little more useful:
$ virsh blockpull gluster-job vda --base /dev/null
error: internal error: Unexpected error: (GenericError) 'Base '/dev/null' not found'
In qemuMonitorJSONExtractCPUInfo an error message hinted on missing
character device data which is wrong.
Also a comment states that only qemu-kvm tree includes the thread_id
field. This is no longer true.
Add a new character device backend called 'spiceport' that uses
spice's channel for communications and apart from spicevmc can be used
as a backend for any character device from libvirt's point of view.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
On the domain startup, this function is called to dump some info about
the CPUs. At the beginning of the function we check if we aren't running
older qemu which is not exposing the CPUs via 'qom-list'. However, we
are not checking for even older qemus, which throw 'CommandNotFound'
error.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The QOM path in qemu that contains the CPUID registers of a running VM
may not be present (introduced in QEMU 1.5).
Since commit d94b781771 we have a regression with QEMU that don't
support reporting of the CPUID register state via the monitor as the
process startup code expects the path to exist.
This patch adds code that checks with the monitor if the requested path
already exists and uses it only in this case.
The qemu monitor supports retrieval of actual CPUID bits presented to
the guest using QMP monitor. Add APIs to extract these information and
tests for them.
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
'const fooPtr' is the same as 'foo * const' (the pointer won't
change, but it's contents can). But in general, if an interface
is trying to be const-correct, it should be using 'const foo *'
(the pointer is to data that can't be changed).
Fix up offenders in src/qemu.
* src/qemu/qemu_bridge_filter.h (networkAllowMacOnPort)
(networkDisallowMacOnPort): Use intended type.
* src/qemu/qemu_bridge_filter.c (networkAllowMacOnPort)
(networkDisallowMacOnPort): Likewise.
* src/qemu/qemu_command.c (qemuBuildTPMBackendStr)
(qemuBuildTPMDevStr, qemuBuildCpuArgStr)
(qemuBuildObsoleteAccelArg, qemuBuildMachineArgStr)
(qemuBuildSmpArgStr, qemuBuildNumaArgStr): Likewise.
* src/qemu/qemu_conf.c (qemuSharedDeviceEntryCopy): Likewise.
* src/qemu/qemu_driver.c (qemuDomainSaveImageStartVM): Likewise.
* src/qemu/qemu_hostdev.c
(qemuDomainHostdevNetConfigVirtPortProfile): Likewise.
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONAttachCharDevCommand): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
When querying for kvm, we try to find 'enabled' field. Hence the error
message should report we haven't found 'enabled' and not 'running'
(which is not even in the reply). Probably a typo or copy-paste error.
Most callers of qemuParseKeywords were assigning its return
value to a 'size_t' variable. Then then also checked '< 0'
for error condition, but this will never be true with the
unsigned size_t variable. Rather than using 'ssize_t', change
qemuParseKeywords so that the element count is returned via
an output parameter, leaving the return value solely as an
error indicator.
This avoids a crash accessing beyond the end of an error
upon OOM.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch will add the qemuMonitorJSONGetMemoryStats() to execute a
"guest-stats" on the balloonpath using "get-qom" replacing the former
mechanism which looked through the "query-ballon" returned data for
the fields. The "query-balloon" code only returns 'actual' memory.
Rather than duplicating the existing code, have the JSON API use the
GetBalloonInfo API.
A check in the qemuMonitorGetMemoryStats() will be made to ensure the
balloon driver path has been set. Since the underlying JSON code can
return data not associated with the balloon driver, we don't fail on
a failure to get the balloonpath. Of course since we've made the check,
we can then set the ballooninit flag. Getting the path here is primarily
due to the process reconnect path which doesn't attempt to set the
collection period.
At vm startup and attach attempt to set the balloon driver statistics
collection period based on the value found in the domain xml file. This
is not done at reconnect since it's possible that a collection period
was set on the live guest and making the set period call would reset to
whatever value is stored in the config file.
Setting the stats collection period has a side effect of searching through
the qom-list output for the virtio balloon driver and making sure that it
has the right properties in order to allow setting of a collection period
and eventually fetching of statistics.
The walk through the qom-list is expensive and thus the balloonpath will
be saved in the monitor private structure as well as a flag indicating
that the initialization has already been attempted (in the event that a
path is not found, no sense to keep checking).
This processing model conforms to the qom object model model which
requires setting object properties after device startup. That is, it's
not possible to pass the period along via the startup code as it won't
be recognized.
Add a new qemuMonitorJSONSetObjectProperty() method to support invocation
of the 'qom-set' JSON monitor command with a provided path, property, and
expected data type to set.
NOTE: The set API was added only for the purpose of the qemumonitorjsontest
The test code uses the same "/machine/i440fx" property as the get test and
attempts to set the "realized" property to "true" (which it should be set
at anyway).
Add a new qemuMonitorJSONGetObjectProperty() method to support invocation
of the 'qom-get' JSON monitor command with a provided path, property, and
expected data type return. The qemuMonitorJSONObjectProperty is similar to
virTypedParameter; however, a future patch will extend it a bit to include
a void pointer to balloon driver statistic data.
NOTE: The ObjectProperty structures and API are added only for the
purpose of the qemumonitorjsontest
The provided test will execute a qom-get on "/machine/i440fx" which will
return a property "realized".
Add a new qemuMonitorJSONGetObjectListPaths() method to support invocation
of the 'qom-list' JSON monitor command with a provided path.
NOTE: The ListPath structures and API's are added only for the
purpose of the qemumonitorjsontest
The returned list of paired data fields of "name" and "type" that can
be used to peruse QOM configuration data and eventually utilize for the
balloon statistics.
The test does a "{"execute":"qom-list", "arguments": { "path": "/"}}" which
returns "{"return": [{"name": "machine", "type": "child<container>"},
{"name": "type", "type": "string"}]}" resulting in a return of an array
of 2 elements with [0].name="machine", [0].type="child<container>". The [1]
entry appears to be a header that could be used some day via a command such
as "virsh qemuobject --list" to format output.
The function being introduced is responsible for preparing and
executing 'chardev-add' qemu monitor command. Moreover, in case
of PTY chardev, the corresponding pty path is updated.
Currently, we are building InetSocketAddress qemu json type
within the qemuMonitorJSONNBDServerStart function. However, other
future functions may profit from the code as well. So it should
be moved into a static function.
Convert the type of loop iterators named 'i', 'j', k',
'ii', 'jj', 'kk', to be 'size_t' instead of 'int' or
'unsigned int', also santizing 'ii', 'jj', 'kk' to use
the normal 'i', 'j', 'k' naming
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add monitor callback API domainGuestPanic, that implements
'destroy', 'restart' and 'preserve' events of the 'on_crash'
in the XML when domain crashed.
Implement check whether (maximum) vCPUs doesn't exceed machine
type's cpu-max settings.
On older versions of QEMU the check is disabled.
Signed-off-by: Michal Novotny <minovotn@redhat.com>
This patch implements support for the "cpu-add" QMP command that plugs
CPUs into a live guest. The "cpu-add" command was introduced in QEMU
1.5. For the hotplug to work machine type "pc-i440fx-1.5" is required.
Commit bd56d0d8 could lead to freeing an uninitialized pointer:
qemu/qemu_monitor_json.c: In function 'qemuMonitorJSONGetCommandLineOptionParameters':
qemu/qemu_monitor_json.c:4284: warning: 'cmd' may be used uninitialized in this function
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetCommandLineOptionParameters): Initialize variable.
Signed-off-by: Eric Blake <eblake@redhat.com>
Ever since the conversion to using only QMP for probing features
of qemu 1.2 and newer, we have been unable to detect features
that are added only by additional command line options. For
example, we'd like to know if '-machine mem-merge=on' (added
in qemu 1.5) is present. To do this, we will take advantage
of qemu 1.5's query-command-line-parameters QMP call [1].
This patch wires up the framework for probing the command results;
if the QMP command is missing, or if a particular command line
option does not output any parameters (for example, -net uses
a polymorphic parser, which showed up as no parameters as of qemu
1.5), we silently treat that command as having no results.
[1] https://lists.gnu.org/archive/html/qemu-devel/2013-04/msg05180.html
* src/qemu/qemu_monitor.h (qemuMonitorGetOptions)
(qemuMonitorSetOptions)
(qemuMonitorGetCommandLineOptionParameters): New functions.
* src/qemu/qemu_monitor_json.h
(qemuMonitorJSONGetCommandLineOptionParameters): Likewise.
* src/qemu/qemu_monitor.c (_qemuMonitor): Add cache field.
(qemuMonitorDispose): Clean it.
(qemuMonitorGetCommandLineOptionParameters): Implement new function.
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetCommandLineOptionParameters): Likewise.
(testQemuMonitorJSONGetCommandLineParameters): Test it.
Signed-off-by: Eric Blake <eblake@redhat.com>
No need to open code a string list cleanup, if we are nice
to the caller by guaranteeing a NULL-terminated result.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONGetCPUDefinitions)
(qemuMonitorJSONGetCommands, qemuMonitorJSONGetEvents)
(qemuMonitorJSONGetObjectTypes, qemuMonitorJSONGetObjectProps):
Use simpler cleanup.
Signed-off-by: Eric Blake <eblake@redhat.com>
Check for an unsupported QMP command when using the query-tpm-models
and query-tpm-types commands before checking for general errors
in order to avoid error messages in the log.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Probe for QEMU's QMP TPM support by querying the lists of
supported TPM models (query-tpm-models) and backend types
(query-tpm-types).
The setting of the capability flags following the strings
returned from the commands above is only provided in the
patch where domain_conf.c gets TPM support due to dependencies
on functions only introduced there.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
Tested-by: Corey Bryant <coreyb@linux.vnet.ibm.com>
