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>
Use the new middle mode within the existing QMP server.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Add trace events for handle_qmp_command(), which dispatches qmp
commands, and monitor_protocol_emitter(), which produces the reply to a
qmp command.
Also remove duplicate #include "trace/control.h".
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Commit 31965ae27b reverted a previous
renaming of CONFIG_SIMPLE_TRACE->CONFIG_TRACE_SIMPLE in a couple spots,
leading to trace-file currently being unavailable.
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Add a monitor command 'info mtree' to show the memory hierarchy
much like /proc/iomem in Linux.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Today our printf format for the "info status" command is:
VM status: %s
Where the string can be "running", "running (single step mode)" or
"paused".
This commit extends it to:
VM status: %s (%s)
The second string corresponds to the "status" field as returned
by the query-status QMP command and it's only printed if "status"
is not "running" or "paused".
Example:
VM status: paused (shutdown)
PS: libvirt uses "info status" when using HMP, but the new format
should not break it.
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>
We have two states where issuing cont before system_reset can
cause problems: RSTATE_SHUTDOWN (when -no-shutdown is used) and
RSTATE_PANICKED (which only happens with kvm).
This commit fixes that by doing the following when state is
RSTATE_SHUTDOWN or RSTATE_PANICKED:
1. returning an error to the user/client if cont is issued
2. automatically transition to RSTATE_PAUSED during system_reset
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Test against RSTATE_IN_MIGRATE instead.
Please, note that the RSTATE_IN_MIGRATE state is only set when all the
initial VM setup is done, while 'incoming_expected' was set right in
the beginning when parsing command-line options. Shouldn't be a problem
as far as I could check.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Today, when notifying a VM state change with vm_state_notify(),
we pass a VMSTOP macro as the 'reason' argument. This is not ideal
because the VMSTOP macros tell why qemu stopped and not exactly
what the current VM state is.
One example to demonstrate this problem is that vm_start() calls
vm_state_notify() with reason=0, which turns out to be VMSTOP_USER.
This commit fixes that by replacing the VMSTOP macros with a proper
state type called RunState.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This patch fixes the spacing of the PC output from 'info cpus' for
SPARC.
Signed-off-by: Nathan Kunkee <nkunkee42@hotmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
The current interface is generic for this small set of operations, and thus
other backends can easily modify the "trace/control.c" file to add their own
implementation.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Generalize the 'st_print_trace_events' and 'st_change_trace_event_state' into
backend-specific 'trace_print_events' and 'trace_event_set_state' (respectively)
in the "trace/control.h" file.
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Provides a more hierarchical view of the variable domain.
Also adds the CONFIG_TRACE_* variables for all backends.
[Stefan added missing 'test' in stap if statement]
Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Commit c62f6d1 (monitor: fix build breakage with --disable-vnc)
conditionalised some VNC setup code but left an unused variable. Move
the variable into the conditional code to fix the build breakage.
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This is the same fix that was recently applied to info mem. Before
this change, info tlb output looked like:
ffffffffffffc000: 000000000fffc000 --------W
ffffffffffffd000: 000000000fffd000 --------W
ffffffffffffe000: 000000000fffe000 --------W
fffffffffffff000: 000000000ffff000 --------W
With this change, it looks like
00000000ffffc000: 000000000fffc000 --------W
00000000ffffd000: 000000000fffd000 --------W
00000000ffffe000: 000000000fffe000 --------W
00000000fffff000: 000000000ffff000 --------W
Signed-off-by: Austin Clements <amdragon@mit.edu>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Previously, "info mem" considered and displayed only the last-level
protection bits for a memory range, which doesn't accurrately
represent the protection of that range. Now it shows the combined
protection.
Signed-off-by: Austin Clements <amdragon@mit.edu>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
"info mem" groups its output into contiguous ranges with identical
protection bits, but previously forgot to print the last range.
Signed-off-by: Austin Clements <amdragon@mit.edu>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Previously, on 32-bit i386, info mem used signed 32-bit int's to store
the page table indexes. As a result, address calculation was done in
32 bits and then incorrectly sign-extended to 64 bits, yielding output
like
ffffffffef000000-ffffffffef031000 0000000000031000 ur-
ffffffffef7bc000-ffffffffef7bd000 0000000000001000 urw
ffffffffef7bd000-ffffffffef7be000 0000000000001000 ur-
This makes these indexes unsigned, which yields correct output
00000000ef000000-00000000ef031000 0000000000031000 ur-
00000000ef7bc000-00000000ef7bd000 0000000000001000 urw
00000000ef7bd000-00000000ef7be000 0000000000001000 ur-
Signed-off-by: Austin Clements <amdragon@mit.edu>
Signed-off-by: Blue Swirl <blauwirbel@gmail.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>
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>
Read them via KVM_GET_SREGS in kvm_arch_get_registers(),
and display them in "info registers".
Also get CR and PID from the existing KVM_GET_REGS.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Using cpu_physical_memory_read, cpu_physical_memory_write and ldub_phys
improves readability and allows removing some type casts.
lduw_phys and ldl_phys were not used because both require aligned
addresses. Therefore it is not possible to simply replace existing
calls by one of these functions.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
All other type casts in calls of cpu_physical_memory_read are
used by hardware emulations and will be fixed by separate patches.
Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
On ppc machines with hash table MMUs, the special purpose register SDR1
contains both the base address of the encoded size (hashed) page tables.
At present, we interpret the SDR1 value within the address translation
path. But because the encodings of the size for 32-bit and 64-bit are
different this makes for a confusing branch on the MMU type with a bunch
of curly shifts and masks in the middle of the translate path.
This patch cleans things up by moving the interpretation on SDR1 into the
helper function handling the write to the register. This leaves a simple
pre-sanitized base address and mask for the hash table in the CPUState
structure which is easier to work with in the translation path.
This makes the translation path more readable. It addresses the FIXME
comment currently in the mtsdr1 helper, by validating the SDR1 value during
interpretation. Finally it opens the way for emulating a pSeries-style
partition where the hash table used for translation is not mapped into
the guests's RAM.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This was done with:
sed -i 's/qemu_get_clock\>/qemu_get_clock_ns/' \
$(git grep -l 'qemu_get_clock\>' )
sed -i 's/qemu_new_timer\>/qemu_new_timer_ns/' \
$(git grep -l 'qemu_new_timer\>' )
after checking that get_clock and new_timer never occur twice
on the same line. There were no missed occurrences; however, even
if there had been, they would have been caught by the compiler.
There was exactly one false positive in qemu_run_timers:
- current_time = qemu_get_clock (clock);
+ current_time = qemu_get_clock_ns (clock);
which is of course not in this patch.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.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>
Allow to tell cpu_x86_inject_mce that it should ignore Action Optional
MCE events when the target VCPU is still processing another one. This
will be used by KVM soon.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Huang Ying <ying.huang@intel.com>
CC: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
CC: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
As this service is used by the human monitor, make sure that errors get
reported to the right channel, and also raise the verbosity.
This requires to move Monitor typedef in qemu-common.h to resolve the
include dependency.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Huang Ying <ying.huang@intel.com>
CC: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
CC: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Define and use dedicated constants for vm_stop reasons, they actually
have nothing to do with the EXCP_* defines used so far. At this chance,
specify more detailed reasons so that VM state change handlers can
evaluate them.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
commit 52c18be9e9 introduced a regression in the
change vnc password command that changed the behavior of setting the VNC
password to an empty string from disabling login to disabling authentication.
This commit refactors the code to eliminate this overloaded semantics in
vnc_display_password and instead introduces the vnc_display_disable_login. The
monitor implementation then determines the behavior of an empty or missing
string.
Recently, a set_password command was added that allows both the Spice and VNC
password to be set. This command has not shown up in a release yet so the
behavior is not yet defined.
This patch proposes that an empty password be treated as an empty password with
no special handling. For specifically disabling login, I believe a new command
should be introduced instead of overloading semantics.
I'm not sure how Spice handles this but I would recommend that we have Spice
and VNC have consistent semantics here for the 0.14.0 release.
Reported-by: Neil Wilson <neil@aldur.co.uk>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
v1 -> v2
- Add a proper return to make sure that login is really disabled instead of
relying on the VNC server to treat empty passwords specially
use after free in do_wav_capture() on the error path.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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>
strtosz() needs to return a 64 bit type even on 32 bit
architectures. Otherwise qemu-img will fail to create disk
images >= 2GB
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When the following test case is injected with mce command, maybe user could not
get the expected result.
DATA
command cpu bank status mcg_status addr misc
(qemu) mce 1 1 0xbd00000000000000 0x05 0x1234 0x8c
Expected Result
panic type: "Fatal Machine check"
That is because each mce command can only inject the given cpu and could not
inject mce interrupt to other cpus. So user will get the following result:
panic type: "Fatal machine check on current CPU"
"broadcast" option is used for injecting dummy data into other cpus. Injecting
mce with this option the expected result could be gotten.
Usage:
Broadcast[on]
command broadcast cpu bank status mcg_status addr misc
(qemu) mce -b 1 1 0xbd00000000000000 0x05 0x1234 0x8c
Broadcast[off]
command cpu bank status mcg_status addr misc
(qemu) mce 1 1 0xbd00000000000000 0x05 0x1234 0x8c
Signed-off-by: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Fix usage of wrong variable, spotted by clang:
/src/qemu/monitor.c:2278:36: warning: The left operand of '&' is a garbage value
prot = pde & (PG_USER_MASK | PG_RW_MASK |
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
'info mem' didn't show correct information for PAE mode and
x86_64 long mode.
Fix by implementing the output for missing modes.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
'info tlb' didn't show correct information for PAE mode and
x86_64 long mode.
Implement the missing modes. Also print NX bit for PAE and long modes.
Fix off-by-one error in 32 bit mode mask.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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>
This patch adds support for connection events to spice. The events are
quite simliar to the vnc events. Unlike vnc spice uses multiple tcp
channels though. qemu will report every single tcp connection (aka
spice channel). If you want track spice sessions only you can filter
for the main channel (channel-type == 1).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The first if/else clause in handler_audit() makes no sense for two
reasons:
1. this function is now called only by QMP code, so testing if
it's a QMP call makes no sense anymore
2. the else clause first asserts that there's no error in the
monitor object, then it tries to free it!
Just drop it.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Commit 030db6e89d dropped do_info() usage from QMP and introduced
qmp_call_query_cmd(). However, the new function doesn't emit QMP's
default OK response when the handler doesn't return data.
Fix that by also calling monitor_protocol_emitter() when
ret_data == NULL, so that the default response is emitted.
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>
'f' double is no longer used, and we should be using floating point
variables to store byte sizes. Remove it.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Octet format relies on strtosz which supports K/k, M/m, G/g, T/t
suffixes and unit support for humans, like 1.3G
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
There was no warning if a bad trace event name was given to
'trace-event' command, thus the user could think that the command
was successful even if this was not the case.
Print a warning if the user tries to enable a trace event which is not
known.
Acked-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Let's be consistent and call it hmp-commands.hx, so that we have
qmp-commands.hx for QMP and hmp-commands.hx for HMP.
Please, note that this commit doesn't touch qemu-monitor.texi. All
texi files have the qemu- prefix and I don't think it's worth
changing that.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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>
