On Thu, Jul 04, 2019 at 11:04:15AM +0200, Lubomir Rintel wrote:
virInitctlSetRunLevel() returns 0 only if ended up doing nothing, 1
if it
actually succeeded. Let's check for the error condition.
Without this, a successful reboot would be treated as a failure and the
LXC driver will proceed sending a TERM signal instead, effectively
cancelling the shutdown.
Can you elaborate on this a bit as I'm not seeing a way for this to
happen with the current code.
- virInitctlSetRunLevel returns 0 if no init was found, 1 if it
was successful, -1 on error
- lxcDomainInitctlCallback checks whether init exists and is
not the same as the host init a then calls virInitctlSetRunLevel.
Due to the checks virInitctlSetRunLevel can only ever return
1 or -1 in this scenario. 0 will never happen
- virLXCDomainSetRunlevel calls lxcDomainInitctlCallback via
virProcessRunInMountNamespace and honours the return status.
So virLXCDomainSetRunlevel shoudl return -1 on error, 1 on
success
- lxcDomainShutdownFlags calls virLXCDomainSetRunlevel and
saves its return value to a variable 'rc'
- If 'rc' is -1 then it sends SIGTERM, otherwise it just
returns 0 indicating success
So I'm not following how we can end up successing talking to
init, and then also sending SIGTERM.
In fact there is a different problem here I believe. We should
be sending SIGTERM when 'rc' is 0 not -1, because rc==0 is what
indicates no init was present.
Signed-off-by: Lubomir Rintel <lkundrak(a)v3.sk>
---
src/lxc/lxc_domain.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/lxc/lxc_domain.c b/src/lxc/lxc_domain.c
index 51a9fd36eb..1dc2d0d4cf 100644
--- a/src/lxc/lxc_domain.c
+++ b/src/lxc/lxc_domain.c
@@ -457,7 +457,9 @@ lxcDomainInitctlCallback(pid_t pid ATTRIBUTE_UNUSED,
data->st[i].st_ino == cont_sb.st_ino)
continue;
- return virInitctlSetRunLevel(fifo, data->runlevel);
+ if (virInitctlSetRunLevel(fifo, data->runlevel) == -1)
+ return -1;
+ return 0;
}
/* If no usable fifo was found then declare success. Caller
--
2.21.0
--
libvir-list mailing list
libvir-list(a)redhat.com
https://www.redhat.com/mailman/listinfo/libvir-list
Regards,
Daniel
--
|:
https://berrange.com -o-
https://www.flickr.com/photos/dberrange :|
|:
https://libvirt.org -o-
https://fstop138.berrange.com :|
|:
https://entangle-photo.org -o-
https://www.instagram.com/dberrange :|