[libvirt] [PATCH] network_conf: check sysfs if the bridge exists on host for user created bridges

The patch fixes the below problem. ============================== If the bridge name is not mentioned in the <network> xml, the bridge name is auto generated from virNetworkAllocateBridge(). If the default template named bridge is created manually by a user, the bridge start will fail with "File exists". bash-4.3$ sudo brctl addbr virbr1 bash-4.3$ brctl show bridge name bridge id STP enabled interfaces br0 8000.000000000000 no virbr0 8000.525400a91d03 yes virbr0-nic virbr1 8000.000000000000 no bash-4.3$ sudo virsh net-list --all Name State Autostart Persistent ---------------------------------------------------------- default active no yes bash-4.3$ cat /tmp/isolated # Notice that the <bridge> intentionally not given. <network> <name>isolated</name> <forward/> <ip address="192.168.123.1" netmask="255.255.255.0"> <dhcp> <range start="192.168.123.2" end="192.168.123.254"/> </dhcp> </ip> </network> bash-4.3$ sudo virsh net-create /tmp/isolated error: Failed to create network from isolated error: Unable to create bridge virbr1: File exists =============================== --- The following series implements... Shivaprasad G Bhat (1): network_conf: check sysfs if the bridge exists on host for user created bridges src/conf/network_conf.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) -- Signature