cpacfstatsd now correctly handles offline cpus and dynamically attaches to
cpus once they get online. If events are enabled when a hotplug event
occurs, cpacfstatsd uses a pseudo-counter to notify user applications about
the occurence of this event and a potential data inaccuracy.
cpacfstats shows if a hotplug event has been detected since at least one
counter was activated. As soon as all counters are deactivated, the
hotplug detection state is reset.
Signed-off-by: Juergen Christ <jchrist@linux.ibm.com>
Reviewed-By: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
The cpacfstats daemon is susceptible to dos attacks from malicious clients
that connect but either do not send a query or receive an answer fast
enough. The latter currently is impossible but might occur once we
introduce further counters.
Solve both problems by exploiting a timed read/write operation in the
daemon and close the connection on timeout.
Signed-off-by: Juergen Christ <jchrist@linux.ibm.com>
Reviewed-By: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is based on the s390-tools-1.39.0 version.
Changes on top of s390-tools-1.39.0:
- Add MIT license to all source files
- Add LICENSE file
- Transform REAMDE to README.md (markdown)
- Add AUTHORS.md file
- Add CONTRIBUTING.md file
- Move changelog from README to CHANGELOG.md file
Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Sertonix