Commit v9.0.0-343-g2048129625 introduced usage of
g_file_set_contents() function to write to /sys/power/state.
This function uses G_FILE_SET_CONTENTS_CONSISTENT flag to
g_file_set_contents_full(), which is implemented by creating
a temp file in the same directory and renaming it to the final
destination. Which is not how sysfs works.
Here, there's not a big deal to do open/write/close - it becomes
almost the same as using g_file_set_contents[_full](). But it
does not have surprises like this.
Also, since this is linux code, it should be ok to use %m in
the error reporting function.
Fixes: 2048129625 "qga/commands-posix: don't do fork()/exec() when suspending via sysfs"
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/3057
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20250801115316.6845-1-mjt@tls.msk.ru>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
"Returns: <description>" is rendered like
Return: <Type> – <description>
Mentioning the type in the description again is commonly redundant.
There is just one such description. Rephrase it not to mention the
type.
We did this for qapi/ in commit f7296f8de5 (qapi: rephrase return
docs to avoid type name).
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250717115246.3830007-4-armbru@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
The QAPI doc generator recently started to auto-generate return
documentation when there is no "Returns:" section (commit 636c96cd77
"qapi: Fix undocumented return values by generating something").
Remove "Returns:" sections where the auto-generated text is obviously
no worse. For instance, guest-info's documentation changes from
Return:
GuestAgentInfo -- GuestAgentInfo
to
Return:
GuestAgentInfo
The auto-generated returns all are in the exact same spot.
We did this for qapi/ in commit 0462da9d6b (qapi: remove trivial
"Returns:" sections).
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250717115246.3830007-3-armbru@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Tagged sections are only recognized at the beginning of a paragraph.
guest-network-get-route's Returns: isn't, and therefore gets rendered
as ordinary text within its paragraph:
Retrieve information about route of network. Returns: List of route
info of guest.
Since there is no (recognized) Returns: section, the doc generator
adds
Return:
[GuestNetworkRoute]
Note: only since recent commit 636c96cd77 (qapi: Fix undocumented
return values by generating something).
Insert the required blank line so that Returns: is recognized.
Result:
Retrieve information about route of network.
Return:
[GuestNetworkRoute] -- List of route info of guest.
Fixes: commit 8e326d36dd (qga/linux: Add new api 'guest-network-get-route')
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250717115246.3830007-2-armbru@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
This commit improves the QGA VSS provider installation flow by attempting to unregister the VSS provider if it's already
found during installation. This allows for a retry of installation even if a previous unregistration failed or was not performed.
This will prevent inconsistencies between QGA and QGA-VSS versions.
Before this commit, QGA can use QGA-VSS from the previous installation.
Signed-off-by: Elizabeth Ashurov <eashurov@redhat.com>
Reviewed-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>
Message-ID: <20250618091806.170110-1-eashurov@redhat.com>
Signed-off-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>
If the agent is set to daemonize but for whatever reason fails to
init the channel, the error message is lost. Worse, the agent
daemonizes needlessly and returns success. For instance:
# qemu-ga -m virtio-serial \
-p /dev/nonexistent_device \
-f /run/qemu-ga.pid \
-t /run \
-d
# echo $?
0
This makes it needlessly hard for init scripts to detect a
failure in qemu-ga startup. Though, they shouldn't pass '-d' in
the first place.
Let's open the channel first and only after that become a daemon.
Related bug: https://bugs.gentoo.org/810628
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Message-ID: <7a42b0cbda5c7e01cf76bc1b29a1210cd018fa78.1736261360.git.mprivozn@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Current logic on return value ('ret' variable) in main() is error
prone. The variable is initialized to EXIT_SUCCESS and then set
to EXIT_FAILURE on error paths. This makes it very easy to forget
to set the variable to indicate error when adding new error path,
as is demonstrated by handling of initialize_agent() failure.
It's simply lacking setting of the variable.
There's just one case where success should be indicated: when
dumping the config ('-D' cmd line argument).
To resolve this, initialize the variable to failure value and set
it explicitly to success value in that one specific case.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Message-ID: <8a28265f50177a8dc4c10fcf4146e85a7fd748ee.1736261360.git.mprivozn@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
The general expectation is that header files should follow the same
file/path naming scheme as the corresponding source file. There are
various historical exceptions to this practice in QEMU, with one of
the most notable being the include/qapi/qmp/ directory.
include/qapi/qmp/dispatch.h corresponds mostly to qapi/qmp-registry.c.
Move and rename it to include/qapi/qmp-registry.h.
Now just qerror.h is left in include/qapi/qmp/. Since it's deprecated
& (slowly) getting eliminated anyway, it isn't worth moving.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20241118151235.2665921-3-armbru@redhat.com>
The general expectation is that header files should follow the same
file/path naming scheme as the corresponding source file. There are
various historical exceptions to this practice in QEMU, with one of
the most notable being the include/qapi/qmp/ directory. Most of the
headers there correspond to source files in qobject/.
This patch corrects most of that inconsistency by creating
include/qobject/ and moving the headers for qobject/ there.
This also fixes MAINTAINERS for include/qapi/qmp/dispatch.h:
scripts/get_maintainer.pl now reports "QAPI" instead of "No
maintainers found".
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com> #s390x
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-ID: <20241118151235.2665921-2-armbru@redhat.com>
[Rebased]
Provide a way to report the process load average, via a new
'guest-get-load' command.
This is only implemented for POSIX platforms providing 'getloadavg'.
Example illustrated with qmp-shell:
(QEMU) guest-get-load
{
"return": {
"load15m": 1.546875,
"load1m": 1.669921875,
"load5m": 1.9306640625
}
}
Windows has no native equivalent API, but it would be possible to
simulate it as illustrated here (BSD-3-Clause):
https://github.com/giampaolo/psutil/pull/1485
This is left as an exercise for future contributors.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Message-ID: <20241202121927.864335-1-berrange@redhat.com>
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
qemu-ga on a NetBSD -current VM terminates with a SIGSEGV upon receiving
'guest-set-time' command...
Core was generated by `qemu-ga'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000000000cd37a40 in ga_pipe_read_str (fd=fd@entry=0xffffff922a20, str=str@entry=0xffffff922a18)
at ../qga/commands-posix.c:88
88 *str[len] = '\0';
[Current thread is 1 (process 1112)]
(gdb) bt
#0 0x000000000cd37a40 in ga_pipe_read_str (fd=fd@entry=0xffffff922a20, str=str@entry=0xffffff922a18)
at ../qga/commands-posix.c:88
#1 0x000000000cd37b60 in ga_run_command (argv=argv@entry=0xffffff922a90,
action=action@entry=0xcda34b8 "set hardware clock to system time", errp=errp@entry=0xffffff922a70, in_str=0x0)
at ../qga/commands-posix.c:164
#2 0x000000000cd380c4 in qmp_guest_set_time (has_time=<optimized out>, time_ns=<optimized out>,
errp=errp@entry=0xffffff922ad0) at ../qga/commands-posix.c:304
#3 0x000000000cd253d8 in qmp_marshal_guest_set_time (args=<optimized out>, ret=<optimized out>, errp=0xffffff922b48)
at qga/qga-qapi-commands.c:193
#4 0x000000000cd4e71c in qmp_dispatch (cmds=cmds@entry=0xcdf5b18 <ga_commands>, request=request@entry=0xf3c711a4b000,
allow_oob=allow_oob@entry=false, cur_mon=cur_mon@entry=0x0) at ../qapi/qmp-dispatch.c:220
#5 0x000000000cd36524 in process_event (opaque=0xf3c711a79000, obj=0xf3c711a4b000, err=0x0) at ../qga/main.c:677
#6 0x000000000cd526f0 in json_message_process_token (lexer=lexer@entry=0xf3c711a79018, input=0xf3c712072480,
type=type@entry=JSON_RCURLY, x=28, y=1) at ../qobject/json-streamer.c:99
#7 0x000000000cd93860 in json_lexer_feed_char (lexer=lexer@entry=0xf3c711a79018, ch=125 '}', flush=flush@entry=false)
at ../qobject/json-lexer.c:313
#8 0x000000000cd93a00 in json_lexer_feed (lexer=lexer@entry=0xf3c711a79018,
buffer=buffer@entry=0xffffff922d10 "{\"execute\":\"guest-set-time\"}\n", size=<optimized out>)
at ../qobject/json-lexer.c:350
#9 0x000000000cd5290c in json_message_parser_feed (parser=parser@entry=0xf3c711a79000,
buffer=buffer@entry=0xffffff922d10 "{\"execute\":\"guest-set-time\"}\n", size=<optimized out>)
at ../qobject/json-streamer.c:121
#10 0x000000000cd361fc in channel_event_cb (condition=<optimized out>, data=0xf3c711a79000) at ../qga/main.c:703
#11 0x000000000cd3710c in ga_channel_client_event (channel=<optimized out>, condition=<optimized out>, data=0xf3c711b2d300)
at ../qga/channel-posix.c:94
#12 0x0000f3c7120d9bec in g_main_dispatch () from /usr/pkg/lib/libglib-2.0.so.0
#13 0x0000f3c7120dd25c in g_main_context_iterate_unlocked.constprop () from /usr/pkg/lib/libglib-2.0.so.0
#14 0x0000f3c7120ddbf0 in g_main_loop_run () from /usr/pkg/lib/libglib-2.0.so.0
#15 0x000000000cda00d8 in run_agent_once (s=0xf3c711a79000) at ../qga/main.c:1522
#16 run_agent (s=0xf3c711a79000) at ../qga/main.c:1559
#17 main (argc=<optimized out>, argv=<optimized out>) at ../qga/main.c:1671
(gdb)
The commandline options used on the host machine...
qemu-system-aarch64 \
-machine type=virt,pflash0=rom \
-m 8G \
-cpu host \
-smp 8 \
-accel hvf \
-device virtio-net-pci,netdev=unet \
-device virtio-blk-pci,drive=hd \
-drive file=netbsd.qcow2,if=none,id=hd \
-netdev user,id=unet,hostfwd=tcp::2223-:22 \
-object rng-random,filename=/dev/urandom,id=viornd0 \
-device virtio-rng-pci,rng=viornd0 \
-serial mon:stdio \
-display none \
-blockdev node-name=rom,driver=file,filename=/opt/homebrew/Cellar/qemu/9.0.2/share/qemu/edk2-aarch64-code.fd,read-only=true \
-chardev socket,path=/tmp/qga_netbsd.sock,server=on,wait=off,id=qga0 \
-device virtio-serial \
-device virtconsole,chardev=qga0,name=org.qemu.guest_agent.0
This patch rectifies the operator precedence while assigning the NUL
terminator.
Fixes: c3f32c13a3
Signed-off-by: Sunil Nimmagadda <sunil@nimmagadda.net>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Link: https://lore.kernel.org/r/m15xppk9qg.fsf@nimmagadda.net
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Reported by clang++, but not by g++.
../qga/vss-win32/provider.cpp:48:6: error: no previous prototype for function 'LockModule' [-Werror,-Wmissing-prototypes]
48 | void LockModule(BOOL lock)
| ^
../qga/vss-win32/provider.cpp:48:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
48 | void LockModule(BOOL lock)
| ^
| static
../qga/vss-win32/provider.cpp:531:13: error: no previous prototype for function 'DllMain' [-Werror,-Wmissing-prototypes]
531 | BOOL WINAPI DllMain(HINSTANCE hinstDll, DWORD dwReason, LPVOID lpReserved)
| ^
../qga/vss-win32/provider.cpp:531:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
531 | BOOL WINAPI DllMain(HINSTANCE hinstDll, DWORD dwReason, LPVOID lpReserved)
| ^
| static
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Konstantin Kostiuk <kkostiuk@redhat.com>
Link: https://lore.kernel.org/r/20241031040426.772604-7-pierrick.bouvier@linaro.org
Signed-off-by: Konstantin Kostiuk <kkostiuk@redhat.com>
