[PATCH RFC v2 0/3] qemu: add an API for "query-stats" QMP command

QEMU is gaining introspectable statistics which can be queried via the "query-stats" QMP command. This patchset aims to add an API for the same. The returned JSON for "query-stats" is an array of objects containing their own respective array of statistics. Patch 1 adds the API which returns the deserialized JSON in the form of a GPtrArray of GHashTables. Patch 2 adds the "query-stats" to QEMU capabilities. Patch 3 uses the API to query the halt poll success time and the halt poll failure time. v1 -> v2 ======== I have been tinkering with the v1 patchset and have rewrote the v2 patches a couple of times. I believe the current patchset is still not perfect and would appreciate some reviews. I have another patch or two written but they do not make any significant changes to the current patchset. [1/3]: - use virBitmap instead of an array of strings for statistics. - add enums for the stat names and add qemuMonitorQueryStatsNameTypeToString to switch between the "ToString" functions based on the target type. - change qemuMonitorQueryStatsProviderNew to a variadic function that takes stat enum values with the sentinel value being -1. [2/3]: - No changes [3/3]: - Add relevant monitor related checks to check if the domain is active. - Acquire and release qemuMonitorObj lock before and after calling qemuMonitorQueryStats respectively. - Add the check for privileged access. Relevant QEMU patches can be found here: https://lore.kernel.org/all/20220530150714.756954-1-pbonzini@redhat.com/ This patchset is part of the 2022 GSOC contributor project. Amneesh Singh (3): qemu_monitor: add qemuMonitorQueryStats qemu_capabilities: add "query-stats" QMP command to the QEMU capabilities qemu_driver: use qemuMonitorQueryStats to extract halt poll time src/qemu/qemu_capabilities.c | 2 + src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_driver.c | 70 ++++++++++++++++--- src/qemu/qemu_monitor.c | 106 ++++++++++++++++++++++++++++ src/qemu/qemu_monitor.h | 56 +++++++++++++++ src/qemu/qemu_monitor_json.c | 130 +++++++++++++++++++++++++++++++++++ src/qemu/qemu_monitor_json.h | 6 ++ 7 files changed, 363 insertions(+), 8 deletions(-) -- 2.36.1