When converting a domain xml containing a CDROM device without
any attached source, don't add a target=(null) to the libxl config
disk definition: xen doesn't like it at all and would fail to start
the domain.
If passing an empty usbdevice_list to libxl, qemu will always get an
-usb parameter for HVM guests with only non-USB input devices. This
causes qemu to crash when passing pvusb device on HVM guests.
The solution is to allocate the list only when an item to put in it
is found.
libxl only has API to address the host USB devices by bus/device.
Find the bus/device if the user only provided the vendor/product
of the USB device.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Finding an USB device from the vendor/device values will be needed
by libxl driver to convert from vendor/device to bus/dev addresses.
Signed-off-by: Jim Fehlig <jfehlig@suse.com>
In case of error, libxlReconnectDomain may call
virDomainObjListRemoveLocked. However it has no local reference on
the domain object, leading to segfault. Get a reference to the domain
object at the start of the function and release it at the end to avoid
problems.
This commit also factorizes code between the error and normal ends.
Any error happening after the hand shake in the lxc controller
will not result in a failure as errors are checked during the handshake.
Move the handshake after the last possible error.
There is no need to deny writes on a readonly mount: write still
won't be accepted, even if the user remounts the folder as RW in
the guest as qemu sets the 9p mount as ro.
This deny rule was leading to problems for example with readonly /:
The qemu process had to write to a bunch of files in / like logs,
sockets, etc. This deny rule was also preventing auditing of these
denials, making it harder to debug.
profile_status function was not making any difference between error
cases and unconfined profiles. The problem with this approach is that
dominfo was throwing an error on unconfined domains.
So far qemu-nbd is run even if the nbd kernel module isn't loaded. This
leads to errors when the user starts his lxc container while libvirt
could easily load the nbd module automatically.
With commit 3f9868a virt-aa-helper stopped working due to missing
DomainGuest in the caps.
The test with -c without arch also needs to be
removed since the new capabilities code uses the host arch when none is
provided.
Initializing libvirt log in virt-aa-helper and getting it to output
libvirt log to stderr. This will help debugging problems happening in
libvirt functions called from within virt-aa-helper
Add the qemu-nbd tasks to the container cgroup to make sure those will
be killed when the container is stopped. In order to reliably get the
qemu-nbd tasks PIDs, we use /sys/devices/virtual/block/<DEV>/pid as
qemu-nbd is daemonizing itself.
lxc-enter-namespace stopped working on recent kernels (at least 3.19+)
due to /proc/PID/ns/* file descriptors being opened RW. From outside
the namespace these can only be opened RO.
commit a58e1cb4 didn't fix the bug if the security_default_confined is
not set to 1. We now clean up even if there is no seclabel defined or
the default one.
Moving code for parsing and formatting network routes to
networkcommon_conf helps reusing those routes for domains. The route
definition has been hidden to help reducing the number of unnecessary
checks in the format function.
Vzctl man page says that --ipadd can be provided multiple times to add
several IP addresses. Looping over the configured ip addresses to add
one --ipadd for each. This would even handle the multiple IPs handled
by openvz_conf.c
Add the possibility to have more than one IP address configured for a
domain network interface. IP addresses can also have a prefix to define
the corresponding netmask.
Add a default implementation of virNetDevSetIPv4Address using netlink
and libnl. This avoids requiring /usr/sbin/ip or /usr/sbin/ifconfig
external binaries.
The typical case for the problem is starting a domain needing a network
that isn't started. Even after starting the network, we get an unknown error
when starting the container.
This is due to dynamic security label not being removed.
When calling virCgroupAllowAllDevices we get these invalid entries
in the device cgroup config.
b -1:-1 rw
c -1:-1 rw
Check for positive values before outputting the major and minor to
avoid that.
Some programs want to change some values for the network interfaces
configuration in /proc/sys/net/ipv[46] folders. Giving RW access on them
allows wicked to work on openSUSE 13.2+.
Reusing the lxcNeedNetworkNamespace function to tell
lxcContainerMountBasicFS if the netns is disabled. When no netns is
set up, then we don't mount the /proc/sys/net/ipv[46] folder RW as
these would provide full access to the host NICs config.
The typical case where we had a problem is with such a filesystem
definition as created by virt-sandbox-service:
<filesystem type='bind' accessmode='passthrough'>
<source dir='/var/lib/libvirt/filesystems/mysshd/var'/>
<target dir='/var'/>
</filesystem>
In this case, we don't want to unmount the /var subtree or we may
loose the access to the source folder.
Resolving symlinks can fail before mounting any file system if one file
system depends on another being mounted. Symlinks are now resolved in
two passes:
* Before any file system is mounted, but then we are more gentle if
the source path can't be accessed
* Right before mounting a file system, so that we are sure that we
have the resolved path... but then if it can't be accessed we raise
an error.
Due to a change (or bug?) in ip link implementation, the command
'ip link add vnet0...'
is forced into
'ip link add name vnet0...'
The changed command also works on older versions of iproute2, just the
'name' parameter has been made mandatory.
If detect_scsi_host_caps reports errors but keeps libvirtd going on
startup, the user is misled by the error messages. Transforming them
into warning still shows the problems, but indicates this is not fatal.
If all features are set to default (including the capabilities policy),
but some capabilities are toggled, we need to output the <features>
element when formatting the config.
Added <capabilities> in the <features> section of LXC domains
configuration. This section can contain elements named after the
capabilities like:
<mknod state="on"/>, keep CAP_MKNOD capability
<sys_chroot state="off"/> drop CAP_SYS_CHROOT capability
Users can restrict or give more capabilities than the default using
this mechanism.
LXC network devices can now be assigned a custom NIC device name on the
container side. For example, this is configured with:
<interface type='network'>
<source network='default'/>
<guest dev="eth1"/>
</interface>
In this example the network card will appear as eth1 in the guest.
Rework the apparmor lxc profile abstraction to mimic ubuntu's container-default.
This profile allows quite a lot, but strives to restrict access to
dangerous resources.
Removing the explicit authorizations to bash, systemd and cron files,
forces them to keep the lxc profile for all applications inside the
container. PUx permissions where leading to running systemd (and others
tasks) unconfined.
Put the generic files, network and capabilities restrictions directly
in the TEMPLATE.lxc: this way, users can restrict them on a per
container basis.
Don't fail when there is nothing to do, as a tweak to the previous
patch regarding output of libvirt-UUID.files for LXC apparmor profiles
Signed-off-by: Eric Blake <eblake@redhat.com>
Tiny fix for virt-lxc-convert: we are setting memory values in bytes, while
free may give us values in a different unit by default: force free to output
bytes with -b flag.
Several function signatures changed in libselinux 2.3, now taking
a 'const char *' instead of 'security_context_t'. The latter is
defined in selinux/selinux.h as
typedef char *security_context_t;
Signed-off-by: Eric Blake <eblake@redhat.com>
See lp#1276719 for the bug description. As virt-aa-helper doesn't know
the VFIO groups to use for the guest, allow access to all
/dev/vfio/[0-9]* and /dev/vfio/vfio files if there is a potential need
for vfio
Signed-off-by: Eric Blake <eblake@redhat.com>
use_apparmor() was first designed to be called from withing libvirtd,
but libvirt_lxc also uses it. in libvirt_lxc, there is no need to check
whether to use apparmor or not: just use it if possible.
The problem with VLAN is that the user still has to manually create the
vlan interface on the host. Then the generated configuration will use
it as a nerwork hostdev device. So the generated configurations of the
following two fragments are equivalent (see rhbz#1059637).
lxc.network.type = phys
lxc.network.link = eth0.5
lxc.network.type = vlan
lxc.network.link = eth0
lxc.network.vlan.id = 5
Cédric Bosdonnat
Cédric Bosdonnat