Add virtio serial channels as transport method for VM and host metrics. A serial port at the VM side provides access to host metrics and metrics of the reading VM, access to metrics of other VMs is not supported. Virtio transport can be activated in the vhostmd transport configuration. The required QEMU setup and the virtio configuration options are documented in the vhostmd README. virtio.c, which is the main part of this change, contains the virtio channel related implementation of the transport. Connection handling and I/O is executed in an additional thread and separates collecting metrics from serving requests. Basic concept of vhostmd/virtio interaction is doumented in the patch. Notes on V3 - moved corrections into separate patches - fixed '-Wall -Werror' issues, built on openSUSE Tumbleweed, gcc 8.2.1 - configured + built with --enable-debug - split the I/O loop function - adjusted logging in virtio code to vhostmd style - added function for access to volatile variable - valgrind + custom tests on SLES11SP3 Michael Trapp (6): Initialize allocated buffer Fix update_interval behaviour Extend vu_buffer struct Add virtio functions Activate virtio support in vhostmd Add virtio support to vm-dump-metrics README | 84 +++- include/util.h | 5 + include/virtio.h | 50 ++ libmetrics/Makefile.am | 17 +- libmetrics/libmetrics.h | 6 + libmetrics/libserialclient.c | 172 +++++++ libmetrics/libserialclient.h | 30 ++ vhostmd.changes | 5 + vhostmd.dtd | 6 +- vhostmd.xml | 6 + vhostmd/Makefile.am | 4 +- vhostmd/util.c | 2 + vhostmd/vhostmd.c | 71 ++- vhostmd/virtio.c | 900 +++++++++++++++++++++++++++++++++++ vm-dump-metrics/main.c | 29 +- 15 files changed, 1366 insertions(+), 21 deletions(-) create mode 100644 include/virtio.h create mode 100644 libmetrics/libserialclient.c create mode 100644 libmetrics/libserialclient.h create mode 100644 vhostmd/virtio.c -- 2.17.1 (Apple Git-112) _______________________________________________ virt-tools-list mailing list virt-tools-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/virt-tools-list
