Calls a QObject handler and emits the QMP response, also drops
monitor_call_handler() which is now unused.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This avoids handle_user_command() calling monitor_call_handler(),
which is currently shared with QMP.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
That name makes no sense anymore, as dispatch tables have been split,
a better name is handler_is_qobject(), which really communicates
the handler's type.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This function was only needed when QMP and HMP were sharing dispatch
tables, this is no longer true so just drop it.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
QMP has its own dispatch table and documentation file
(qmp-commands.hx), we can now drop the following QMP specific info
from qemu-monitor.hx:
o SQMP/EQMP sections
o The qmp_capabilities command
o The query-commands command
However, note that QObject handlers entries are not being removed.
This will only happen when we introduce a proper QMP call interface.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
QMP has its own dispatch tables, we can now drop the following
checks:
o 'info' command: this command doesn't exist in QMP's
dispatch table, the right thing will happen when it's
issued by a client (ie. command not found error)
o monitor_handler_ported(): all QMP handlers are 'ported', no
need to check for that
o monitor_cmd_user_only(): no HMP handler will exist in QMP's
dispatch tables, that's why we have split them after all :-)
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The new table is a copy of HMP's table, containing only QObject
handlers.
In the near future HMP will be making QMP calls and then we will
be able to drop QObject handlers from HMP's table.
From now on, QMP and HMP have different query command dispatch
tables.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Also update QMP functions to use it. The table is generated
from the qmp-commands.hx file.
From now on, QMP and HMP have different command dispatch
tables.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Next commit needs this new function: it will introduce the
the QMP's command dispatch table and qmp_find_cmd() will be
used to search on it.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
If I understood it correcty, the is_async_return() logic was only
used to prevent QMP from issuing duplicated success responses
for asynchronous handlers.
However, QMP doesn't use do_info() anymore so this is dead logic
and (hopefully) can be safely dropped.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Since its inception, QMP has been using HMP's do_info() function
to run query commands.
This was a bad choice, as it made do_info() more complex and
contributed to couple QMP and HMP.
This commit fixes that by doing the following changes:
1. Introduce qmp_find_query_cmd() and use it to directly lookup
the info_cmds table
2. Introduce qmp_call_query_cmd() so that QMP code is able
to call query handlers without using do_info()
3. Drop do_info() usage (via monitor_find_command("info"))
We need all the three changes in one shot so that we don't break
the calling of query commands in QMP.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Next commit will change how query commands are handled in a
way that the 'cmd' sanity check is also going to be needed
for query commands handling.
Let's move it out of the else body then.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
It's a generic version of monitor_find_command() which searches
the dispatch table passed as an argument.
Future commits will introduce new dispatch tables, so we need
common code to search them.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Expaned '-mon' arg to allow a 'pretty=on' flag. This makes the
monitor pretty print its replies to easy human debugging / reading
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This patch adds the trace-file command:
trace-file [on|off|flush]
Open, close, or flush the trace file. If no argument is given,
the status of the trace file is displayed.
The trace file is turned on by default but is only written out when the
trace buffer becomes full. The flush operation can be used to force
write out at any time.
Turning off the trace file does not change the state of trace events;
tracing will continue to the trace buffer. When the trace file is off,
use "info trace" to display the contents of the trace buffer in memory.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This commit also contains the trace-file sub-command from the following
commit:
commit 5ce8d1a957afae2c52ad748944ce72848ccf57bd
Author: Prerna Saxena <prerna@linux.vnet.ibm.com>
Date: Wed Aug 4 16:23:54 2010 +0530
trace: Add options to specify trace file name at startup and runtime
This patch adds an optional command line switch '-trace' to specify the
filename to write traces to, when qemu starts.
Eg, If compiled with the 'simple' trace backend,
[temp@system]$ qemu -trace FILENAME IMAGE
Allows the binary traces to be written to FILENAME instead of the option
set at config-time.
Also, this adds monitor sub-command 'set' to trace-file commands to
dynamically change trace log file at runtime.
Eg,
(qemu)trace-file set FILENAME
This allows one to set trace outputs to FILENAME from the default
specified at startup.
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This patch adds support for dynamically enabling/disabling of trace events.
This is done by internally maintaining each trace event's state, and
permitting logging of data from a trace event only if it is in an
'active' state.
Monitor commands added :
1) info trace-events : to view all available trace events and
their state.
2) trace-event NAME on|off : to enable/disable data logging from a
given trace event.
Eg, trace-event paio_submit off
disables logging of data when
paio_submit is hit.
By default, all trace-events are disabled. One can enable desired trace-events
via the monitor.
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
trace: Monitor command 'info trace'
Monitor command 'info trace' to display contents of trace buffer
Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
trace: Remove monitor.h dependency from simpletrace
User-mode targets don't have a monitor so the simple trace backend
currently does not build on those targets. This patch abstracts the
monitor printing interface so there is no direct coupling between
simpletrace and the monitor.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This code was originally developed by Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Miguel Di Ciurcio Filho <miguel.filho@gmail.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This patch improves the resilience of the load_vmstate() function, doing
further and better ordered tests.
In load_vmstate(), if there is any error on bdrv_snapshot_goto(), except if the
error is on VM state device, load_vmstate() will return zero and the VM will be
started with major corruption chances.
The current process:
- test if there is any writable device without snapshot support
- if exists return -error
- get the device that saves the VM state, possible return -error but unlikely
because it was tested earlier
- flush I/O
- run bdrv_snapshot_goto() on devices
- if fails, give an warning and goes to the next (not good!)
- if fails on the VM state device, return zero (not good!)
- check if the requested snapshot exists on the device that saves the VM state
and the state is not zero
- if fails return -error
- open the file with the VM state
- if fails return -error
- load the VM state
- if fails return -error
- return zero
New behavior:
- get the device that saves the VM state
- if fails return -error
- check if the requested snapshot exists on the device that saves the VM state
and the state is not zero
- if fails return -error
- test if there is any writable device without snapshot support
- if exists return -error
- test if the devices with snapshot support have the requested snapshot
- if anyone fails, return -error
- flush I/O
- run snapshot_goto() on devices
- if anyone fails, return -error
- open the file with the VM state
- if fails return -error
- load the VM state
- if fails return -error
- return zero
do_loadvm must not call vm_start if any error has occurred in load_vmstate.
Signed-off-by: Miguel Di Ciurcio Filho <miguel.filho@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When a 'cont' is issued on a VM that's just waiting for an incoming
migration, the VM reboots and boots into the guest, possibly corrupting
its storage since it could be shared with another VM running elsewhere.
Ensure that a VM started with '-incoming' is only run when an incoming
migration successfully completes.
A new qerror, QERR_MIGRATION_EXPECTED, is added to signal that 'cont'
failed due to no incoming migration has been attempted yet.
Reported-by: Laine Stump <laine@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Ported commands that are marked 'user_only' will not be considered for
QMP monitor sessions. This allows to implement new commands that do not
(yet) provide a sufficiently stable interface for QMP use.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This is similar to qmp_check_client_args(), but it checks if
the input object follows the specification (QMP/qmp-spec.txt
section 2.3).
As we're limited to three keys, the work here is quite simple:
we iterate over the input object, checking each time if the
current argument complies to the specification.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Previous two commits added qmp_check_client_args(), which
fully replaces this code and is way better.
It's important to note that the new checker doesn't support
the '/' arg type. As we don't have any of those handlers
converted to QMP, this is just dead code.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit introduces the second (and last) part of QMP's new
argument checker.
The job is done by check_client_args_type(), it iterates over
the client's argument qdict and for for each argument it checks
if it exists and if its type is valid.
It's important to observe the following changes from the existing
argument checker:
- If the handler accepts an O-type argument, unknown arguments
are passed down to it. It's up to O-type handlers to validate
their arguments
- Boolean types (eg. 'b' and '-') don't accept integers anymore,
only json-bool
- Argument types '/' and '.' are currently unsupported under QMP,
thus they're not handled
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Current QMP's argument checker is more complex than it should be
and has (at least) one serious bug: it ignores unknown arguments.
To solve both problems we introduce a new argument checker. It's
added on top of the existing one, so that there are no regressions
during the transition.
This commit introduces the first part of the new checker, which
is run by qmp_check_client_args() and does the following:
1. Check if all mandatory arguments were provided
2. Set flags for argument validation
In order to do that, we transform the args_type string (from
qemu-montor.hx) into a qdict and iterate over it.
Next commit adds the new checker's second part: type checking and
invalid argument detection.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Historically, user monitor arguments beginning with '-' (eg. '-f')
were passed as integers down to handlers.
I've maintained this behavior in the new monitor because we didn't
have a boolean type at the very beginning of QMP. Today we have it
and this behavior is causing trouble to QMP's argument checker.
This commit fixes the problem by doing the following changes:
1. User Monitor
Before: the optional arg was represented as a QInt, we'd pass 1
down to handlers if the user specified the argument or
0 otherwise
This commit: the optional arg is represented as a QBool, we pass
true down to handlers if the user specified the
argument, otherwise _nothing_ is passed
2. QMP
Before: the client was required to pass the arg as QBool, but we'd
convert it to QInt internally. If the argument wasn't passed,
we'd pass 0 down
This commit: still require a QBool, but doesn't do any conversion and
doesn't pass any default value
3. Convert existing handlers (do_eject()/do_migrate()) to the new way
Before: Both handlers would expect a QInt value, either 0 or 1
This commit: Change the handlers to accept a QBool, they handle the
following cases:
A) true is passed: the option is enabled
B) false is passed: the option is disabled
C) nothing is passed: option not specified, use
default behavior
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The current asynchronous command API doesn't return a QMP response
when the async command fails.
This is easy to reproduce with the balloon command (the sole async
command we have so far): run qemu w/o the '-balloon virtio' option
and try to issue the balloon command via QMP: no response will be
sent to the client.
This commit fixes the problem by making qmp_async_cmd_handler()
return the handler's error code and then calling
monitor_protocol_emitter() if the handler has returned an error.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
As we want to add more flags to monitor commands, convert the only so
far existing one accordingly.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
We now have to move forward to the next argument type via next_arg_type.
This patch fixes completion for 'eject' and maybe also other commands.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Given too many arguments or an invalid command, we were leaking the
duplicated argument strings.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The code comes from
http://lists.gnu.org/archive/html/qemu-devel/2010-05/msg02788.html
Without this patch it is not possible to send at least 10 special
characters (\|'"`~:;[]{}) via the monitor sendkey command.
Signed-off-by: Bernhard M. Wiedemann <qemudevbmw@lsmod.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This command was of minimal use before, now it is useless as the hpet
become a qdev device and is thus easily discoverable. We should
definitely not set query-hpet in QMP's stone, and there is also no good
reason to keep it for the interactive monitor.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Anything that moves hundreds of lines out of vl.c can't be all bad.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Previous commit added QMP documentation to the qemu-monitor.hx
file, it's is a copy of this information.
While it's good to keep it near code, maintaining two copies of
the same information is too hard and has little benefit as we
don't expect client writers to consult the code to find how to
use a QMP command.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This is a new version of the (now reverted) following commit:
0e8d2b5575
The 'quit' Monitor command (implemented by do_quit()) calls
exit() directly, this is problematic under QMP because QEMU
exits before having a chance to send the ok response.
Clients don't know if QEMU exited because of a problem or
because the 'quit' command has been executed.
This commit fixes that by making do_quit() use
qemu_system_shutdown_request(), so that we exit gracefully.
Thanks to Paolo Bonzini <pbonzini@redhat.com> for suggesting
this solution.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Recalculate Sparc64 CPU flags on interrupts, otherwise some earlier
flags could be stored to pstate.
Refactor PSR/CCR/CWP handling: concentrate the actual
functions to op_helper.c.
Thanks to Igor Kovalenko for reporting.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Current code of monitor command: 'change', used to open file for read-write
uncoditionally. Change to open it as read-only for CDROM, and read-write for all others.
Signed-off-by: Naphtali Sprei <nsprei@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
It's emitted when the Virtual Machine resumes execution.
We currently have the STOP event but don't have the matching
RESUME one, this means that clients are notified when the VM
is stopped but don't get anything when it resumes.
Let's fix that as it's already causing some trouble to libvirt.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
If there is already a fd in s->msgfd before recvmsg it is
closed by parts that this patch does not touch. So, only
one descriptor can be "leaked" by attaching it to a command
other than getfd.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The 'quit' Monitor command (implemented by do_quit()) calls
exit() directly, this is problematic under QMP because QEMU
exits before having a chance to send the ok response.
Clients don't know if QEMU exited because of a problem or
because the 'quit' command has been executed.
This commit fixes that by moving the exit() call to the main
loop, so that do_quit() requests the system to quit, instead
of calling exit() directly.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Luiz Capitulino
Daniel P. Berrange
Stefan Hajnoczi
Prerna Saxena
Miguel Di Ciurcio Filho
Amit Shah
Anthony Liguori
Paolo Bonzini
Jan Kiszka
Bernhard M. Wiedemann
Markus Armbruster
Blue Swirl
Naphtali Sprei