Commit Graph

30 Commits

Author SHA1 Message Date
Michal Privoznik
9ef6541cec examples: Define _GNU_SOURCE for more examples
Some of our examples use GNU/Linux extensions functions/variables:

1) domtop.c uses usleep(3),
2) logging.c uses getopt(3).

Put _GNU_SOURCE definition at the top of corresponding files so
that users can just grab the code and compile it (in contrast
with the rest of the code where _GNU_SOURCE is declared in
meson-config.h).

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2024-02-07 18:01:03 +01:00
Egor Makrushin
f70b7c9772 Explicitly convert type to double to avoid losing precision
Division between integers will also be integer.
Thus, to preserve fractional part explicitly
convert first operand to double.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 28d54aab05 ("examples: Introduce domtop")
Signed-off-by: Egor Makrushin <emakrushin@astralinux.ru>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
2024-01-24 10:21:23 +01:00
zhujun2
c80f0852ca examples: Fix printf format string in event-test.c
Inside of myDomainEventMemoryFailureCallback() arguments are
printed via printf but '%d' is used to print @flags (of type
uint). Use '0x%x' instead, just like we do everywhere else.

Signed-off-by: zhujun2 <zhujun2@cmss.chinamobile.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2023-10-20 10:22:34 +02:00
K Shiva Kiran
e9ffe9ad80 examples: Report network metadata change event
Signed-off-by: K Shiva Kiran <shiva_kr@riseup.net>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2023-09-18 11:24:55 +02:00
Michal Privoznik
7db8373e08 Use G_N_ELEMENTS() more
In a few places we still use the good old:

  sizeof(var) / sizeof(var[0])
  sizeof(var) / sizeof(int)

The G_N_ELEMENTS() macro is preferred though. In a few places we
don't link with glib, so provide the macro definition.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Kristina Hanicova <khanicov@redhat.com>
2023-03-13 13:29:07 +01:00
Martin Kletzander
93b9e6503e Fix couple of comment typos
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2022-11-30 12:18:11 +01:00
Jiang Jiacheng
4b90adf65a lib: Use the same style in the 'struct option'
Use same style in the 'struct option' as:
    struct option opt[] = {
        { a, b },
        { a, b },
        ...
        { a, b },
    };

Signed-off-by: Jiang Jiacheng <jiangjiacheng@huawei.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2022-11-22 10:15:11 +01:00
Jiri Denemark
aab9d64d4d Introduce VIR_DOMAIN_RUNNING_POSTCOPY_FAILED
This new "post-copy failed" reason for the running state will be used on
the destination host when post-copy migration fails while the domain is
already running there.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
2022-06-07 17:40:20 +02:00
Daniel P. Berrangé
4166f6bc59 examples: drop some conditionals checks from macros
We no longer need to worry about GCC version older than 7.4.0. The other
remaining conditionals checks were also overkill for the example code.
In the unlikely event that someone tries to re-use the code in a
scenario where further conditions apply they can figure out.

Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2022-01-17 10:44:33 +00:00
Michal Privoznik
de617ce96b admin: Build only when RPC is available
The admin module is very closely tied to RPC. If we are
building without RPC support there's not much use for the
admin module, in fact it fails to build.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2021-12-15 12:12:44 +01:00
Ján Tomko
dacf616b78 examples: hellolibvirt: fix argc check
https://gitlab.com/libvirt/libvirt/-/issues/255

Reported-by: Jeremy Alcim
Signed-off-by: Ján Tomko <jtomko@redhat.com>
2021-12-14 12:12:40 +01:00
Michal Privoznik
784e9e2b62 lib: Drop needless one line labels
In some cases we have a label that contains nothing but a return
statement. The amount of such labels rises as we use automagic
cleanup. Anyway, such labels are pointless and can be dropped.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
2021-11-22 12:39:59 +01:00
Michal Privoznik
a4056d52eb examples/dommigrate: Make retval portable
Currently, the dommigrate example returns 0 or 1 for success or
failure state, respectively. Except for a few cases where it
forgot to change the @ret variable just before jumping onto the
'cleanup' label. Making the code follow our usual pattern
(initialize @ret to an error value and set it to success value
only at the end) fixes those cases. Also, using EXIT_SUCCESS and
EXIT_FAILURE is more portable (even though on my system they are
just an alias to values the example already uses).

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Kristína Hanicová <khanicov@redhat.com>
2021-11-12 17:17:16 +01:00
Michal Privoznik
132069f845 examples/dommigrate: Don't set retval in usage()
The usage() function should just print expected arguments. Make
the function return void then.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Kristína Hanicová <khanicov@redhat.com>
2021-11-12 17:17:12 +01:00
Michal Privoznik
9985f62b51 qemu: Wire up MEMORY_DEVICE_SIZE_CHANGE event
As advertised in previous commit, this event is delivered to us
when virtio-mem module changes the allocation inside the guest.
It comes with one attribute - size - which holds the new size of
the virtio-mem (well, allocated size), in bytes.
Mind you, this is not necessarily the same number as 'requested
size'. It almost certainly will be when sizing the memory up, but
it might not be when sizing the memory down - the guest kernel
might be unable to free some blocks.

This current size is reported in the domain XML as an output
element only.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2021-10-01 11:04:47 +02:00
Jonathon Jongsma
94187b8004 nodedev: add DEFINED/UNDEFINED lifecycle events
Since a mediated device can be persistently defined by the mdevctl
backend, we need additional lifecycle events beyond CREATED/DELETED to
indicate that e.g. the device has been stopped but the device definition
still exists.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
2021-04-07 15:07:45 -05:00
Kristina Hanicova
4fc755bec1 event-test: Properly terminate strings printed from callbacks
Stdio was buffering strings in functions:
myDomainEventBlockJobCallback,
myDomainEventBlockThresholdCallback,
myDomainEventMemoryFailureCallback. It caused flushing the
printed strings from callbacks at the end of a run, not
gradually. The solution is to add \n at the end of each string.

Signed-off-by: Kristina Hanicova <khanicov@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
2021-02-19 15:10:48 +01:00
zhenwei pi
b866adf8d9 libvirt: support memory failure event
Introduce memory failure event. Libvirt should monitor domain's
event, then posts it to uplayer. According to the hardware memory
corrupted message, a cloud scheduler could migrate domain to another
health physical server.

Several changes in this patch:
public API:
    include/*
    src/conf/*
    src/remote/*
    src/remote_protocol-structs

client:
    examples/c/misc/event-test.c
    tools/virsh-domain.c

With this patch, each driver could implement its own method to run
this new event.

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2020-10-23 09:41:52 +02:00
Daniel P. Berrangé
30703564c2 examples: fix misc spelling errors reported by codespell
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2020-10-05 10:28:46 +01:00
Ján Tomko
8b80d9f0f9 Use (un)signed printf specifiers correctly
Various places reported by cppcheck's invalidPrintfArgType_sint
and invalidPrintfArgType_uint.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
2020-09-23 13:26:35 +02:00
Pavel Hrdina
f31209fc6c meson: examples: build and install example files
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>
2020-08-03 09:27:06 +02:00
zhenwei pi
26badd13e8 qemu: support Panic Crashloaded event handling
Pvpanic device supports bit 1 as crashloaded event, it means that
guest actually panicked and run kexec to handle error by guest side.

Handle crashloaded as a lifecyle event in libvirt.

Test case:
Guest side:
before testing, we need make sure kdump is enabled,
1, build new pvpanic driver (with commit from upstream
   e0b9a42735f2672ca2764cfbea6e55a81098d5ba
   191941692a3d1b6a9614502b279be062926b70f5)
2, insmod new kmod
3, enable crash_kexec_post_notifiers,
  # echo 1 > /sys/module/kernel/parameters/crash_kexec_post_notifiers
4, trigger kernel panic
  # echo 1 > /proc/sys/kernel/sysrq
  # echo c > /proc/sysrq-trigger

Host side:
1, build new qemu with pvpanic patches (with commit from upstream
   600d7b47e8f5085919fd1d1157f25950ea8dbc11
   7dc58deea79a343ac3adc5cadb97215086054c86)
2, build libvirt with this patch
3, handle lifecycle event and trigger guest side panic
  # virsh event stretch --event lifecycle
  event 'lifecycle' for domain stretch: Crashed Crashloaded
  events received: 1

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
2020-02-07 14:05:25 +00:00
Daniel P. Berrangé
4d61dd5abf examples: remove obsolete workaround for mingw
The build still succeeds with the workaround removed, so
whatever was causing the problem no longer exists.

Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2020-02-04 14:00:44 +00:00
Daniel P. Berrangé
fa434739a0 src: replace verify(expr) with G_STATIC_ASSERT(expr)
G_STATIC_ASSERT() is a drop-in functional equivalent of
the GNULIB verify() macro.

Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
2020-01-17 10:02:01 +00:00
Daniel Henrique Barboza
a7c6faa7ee examples: remove unneeded labels
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>
2020-01-07 16:40:41 +01:00
Peter Krempa
08b810053a Add 'backup' block job type
A backup job may consist of many backup sub-blockjobs. Add the new
blockjob type and add all type converter strings.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-12-10 12:41:57 +01:00
Daniel Henrique Barboza
c0666eb7c8 suspend.c: remove unneeded cleanup label
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
2019-11-12 17:54:01 +01:00
Ján Tomko
d99f17a502 examples: Use G_N_ELEMENTS instead of ARRAY_CARDINALITY
We try to keep the example programs independent of libraries
other than libvirt.

Rename the locally defined ARRAY_CARDINALITY macro to G_N_ELEMENTS
which GLib provides, even though we don't actually include GLib.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-10-15 16:14:19 +02:00
Ján Tomko
c3211e0ba4 examples: use G_GNUC_UNUSED
Name the macro G_GNUC_UNUSED instead of ATTRIBUTE_UNUSED
to match the rest of libvirt code.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2019-10-15 11:25:22 +02:00
Andrea Bolognani
571cb9db30 examples: Group all C programs together
All other examples are organized using the either the format/
or the format/category/ hierarchy already, and grouping all
C programs together removes the last remaining outliers.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Acked-by: Michal Privoznik <mprivozn@redhat.com>
2019-06-03 17:27:43 +02:00