If the ipv6 kernel module is not loaded, then we get this when starting a virtual network: libvir: Network Config error : cannot enable /proc/sys/net/ipv6/conf/virbr0/disable_ipv6: No such file or directory If disable_ipv6 is not present, we should just merrily continue on our way. * src/network_driver.c: make networkDisableIPV6() not fail if the kernel has no ipv6 support --- src/network_driver.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/src/network_driver.c b/src/network_driver.c index eaea454..84910ab 100644 --- a/src/network_driver.c +++ b/src/network_driver.c @@ -801,6 +801,12 @@ static int networkDisableIPV6(virConnectPtr conn, goto cleanup; } + if (access(field, W_OK) < 0 && errno == ENOENT) { + VIR_DEBUG("ipv6 appears to already be disabled on %s", network->def->bridge); + ret = 0; + goto cleanup; + } + if (virFileWriteStr(field, "1") < 0) { virReportSystemError(conn, errno, _("cannot enable %s"), field); -- 1.6.2.5