[PATCH 0/4] ch: timeout fix (GitLab issue #743)

This patch series is supposed to fix the following reported issue on GitLab: virtchd times out even with an active guest running https://gitlab.com/libvirt/libvirt/-/issues/743 During further investigation, we found that there are in fact two bugs: 1. The CH driver does not store any domains' XMLs onto disk, and as a result it does not have any information about running domains when it restarts. Previously, the CH driver did not save any XMLs onto the disk, neither transient nor persistent definitions. To address this issue, add transient domain XML saving when a new domain is defined, as well as saving transient domain XML when a domain starts, to enable reconnecting to running domains when the driver restarts. Now all persistent and transient definitions are stored onto the disk. Also add running domain reconnection helper functions to restore the connection between the driver and running VMM when the driver restarts, to be able to continue work with running domains. 2. Timeout should not be active while a client is connected or there is a running domain. The second bug led to a situation where the CH driver timed out (e.g., --timeout 60) even when some domains were still running. Previously, only an active virsh session prevented the driver from timing out. To address this issue, an inhibitor for the CH driver has been added to prevent the timeout. The inhibitor now stores the count of running domains and prevents the timeout if the count is above zero. NOTE: This series patch series is depend on followin patch series: https://lists.libvirt.org/archives/list/devel@lists.libvirt.org/thread/O3... Kirill Shchetiniuk (4): ch: add persistent definition save and load ch: add transient definition save and load ch: add reconnection to running domains ch: fix timeout while domain is still running src/ch/ch_conf.c | 10 ++- src/ch/ch_conf.h | 6 ++ src/ch/ch_domain.c | 15 +++++ src/ch/ch_domain.h | 3 + src/ch/ch_driver.c | 49 ++++++++++++++- src/ch/ch_monitor.c | 65 ++++++++++++++++++++ src/ch/ch_monitor.h | 2 + src/ch/ch_process.c | 147 ++++++++++++++++++++++++++++++++++++++++++++ src/ch/ch_process.h | 2 + 9 files changed, 293 insertions(+), 6 deletions(-) -- 2.48.1