[libvirt] [PATCH] network: avoid trying to create global firewall rules if unprivileged
The unprivileged libvirtd does not have permission to create firewall rules, or bridge devices, or do anything to the host network in general. Historically we still activate the network driver though and let the network start API call fail. The startup code path which reloads firewall rules on active networks would thus effectively be a no-op when unprivileged as it is impossible for there to be any active networks With the change to use a global set of firewall chains, however, we now have code that is run unconditionally. Ideally we would not register the network driver at all when unprivileged, but the entanglement with the virt drivers currently makes that impractical. As a temporary hack, we just make the firewall reload into a no-op. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> --- src/network/bridge_driver.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index c3e1381124..7d95675623 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -2095,6 +2095,10 @@ static void networkReloadFirewallRules(virNetworkDriverStatePtr driver, bool startup) { VIR_INFO("Reloading iptables rules"); + /* Ideally we'd not even register the driver when unprivilegd + * but until we untangle the virt driver that's not viable */ + if (!driver->privileged) + return; if (networkPreReloadFirewallRules(startup) < 0) return; virNetworkObjListForEach(driver->networks, -- 2.20.1
ping On Wed, Mar 13, 2019 at 04:24:02PM +0000, Daniel P. Berrangé wrote:
The unprivileged libvirtd does not have permission to create firewall rules, or bridge devices, or do anything to the host network in general. Historically we still activate the network driver though and let the network start API call fail.
The startup code path which reloads firewall rules on active networks would thus effectively be a no-op when unprivileged as it is impossible for there to be any active networks
With the change to use a global set of firewall chains, however, we now have code that is run unconditionally.
Ideally we would not register the network driver at all when unprivileged, but the entanglement with the virt drivers currently makes that impractical. As a temporary hack, we just make the firewall reload into a no-op.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> --- src/network/bridge_driver.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index c3e1381124..7d95675623 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -2095,6 +2095,10 @@ static void networkReloadFirewallRules(virNetworkDriverStatePtr driver, bool startup) { VIR_INFO("Reloading iptables rules"); + /* Ideally we'd not even register the driver when unprivilegd + * but until we untangle the virt driver that's not viable */ + if (!driver->privileged) + return; if (networkPreReloadFirewallRules(startup) < 0) return; virNetworkObjListForEach(driver->networks, -- 2.20.1
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 :|
On 3/13/19 5:24 PM, Daniel P. Berrangé wrote:
The unprivileged libvirtd does not have permission to create firewall rules, or bridge devices, or do anything to the host network in general. Historically we still activate the network driver though and let the network start API call fail.
The startup code path which reloads firewall rules on active networks would thus effectively be a no-op when unprivileged as it is impossible for there to be any active networks
With the change to use a global set of firewall chains, however, we now have code that is run unconditionally.
Ideally we would not register the network driver at all when unprivileged, but the entanglement with the virt drivers currently makes that impractical. As a temporary hack, we just make the firewall reload into a no-op.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> --- src/network/bridge_driver.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c index c3e1381124..7d95675623 100644 --- a/src/network/bridge_driver.c +++ b/src/network/bridge_driver.c @@ -2095,6 +2095,10 @@ static void networkReloadFirewallRules(virNetworkDriverStatePtr driver, bool startup) { VIR_INFO("Reloading iptables rules"); + /* Ideally we'd not even register the driver when unprivilegd + * but until we untangle the virt driver that's not viable */ + if (!driver->privileged) + return; if (networkPreReloadFirewallRules(startup) < 0) return; virNetworkObjListForEach(driver->networks,
ACK Michal
participants (2)
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Daniel P. Berrangé -
Michal Privoznik