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util: Add function virCgroupHasEmptyTasks
That function helps checking whether there's a task in that cgroup. Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
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@ -1096,6 +1096,7 @@ virCgroupGetMemSwapHardLimit;
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virCgroupGetMemSwapUsage;
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virCgroupGetMemSwapUsage;
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virCgroupGetPercpuStats;
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virCgroupGetPercpuStats;
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virCgroupHasController;
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virCgroupHasController;
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virCgroupHasEmptyTasks;
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virCgroupIsolateMount;
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virCgroupIsolateMount;
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virCgroupKill;
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virCgroupKill;
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virCgroupKillPainfully;
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virCgroupKillPainfully;
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@ -3926,6 +3926,20 @@ virCgroupSupportsCpuBW(virCgroupPtr cgroup)
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return ret;
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return ret;
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}
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}
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int
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virCgroupHasEmptyTasks(virCgroupPtr cgroup, int controller)
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{
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int ret = -1;
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char *content = NULL;
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ret = virCgroupGetValueStr(cgroup, controller, "tasks", &content);
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if (ret == 0 && content[0] == '\0')
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ret = 1;
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VIR_FREE(content);
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return ret;
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}
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#else /* !VIR_CGROUP_SUPPORTED */
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#else /* !VIR_CGROUP_SUPPORTED */
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@ -4655,4 +4669,13 @@ virCgroupSetOwner(virCgroupPtr cgroup ATTRIBUTE_UNUSED,
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return -1;
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return -1;
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}
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}
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int
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virCgroupHasEmptyTasks(virCgroupPtr cgroup ATTRIBUTE_UNUSED,
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int controller ATTRIBUTE_UNUSED)
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{
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virReportSystemError(ENOSYS, "%s",
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_("Control groups not supported on this platform"));
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return -1;
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}
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#endif /* !VIR_CGROUP_SUPPORTED */
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#endif /* !VIR_CGROUP_SUPPORTED */
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@ -1,7 +1,7 @@
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/*
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/*
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* vircgroup.h: methods for managing control cgroups
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* vircgroup.h: methods for managing control cgroups
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*
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*
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* Copyright (C) 2011-2013 Red Hat, Inc.
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* Copyright (C) 2011-2014 Red Hat, Inc.
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* Copyright IBM Corp. 2008
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* Copyright IBM Corp. 2008
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*
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*
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* This library is free software; you can redistribute it and/or
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* This library is free software; you can redistribute it and/or
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@ -270,4 +270,6 @@ int virCgroupSetOwner(virCgroupPtr cgroup,
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gid_t gid,
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gid_t gid,
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int controllers);
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int controllers);
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int virCgroupHasEmptyTasks(virCgroupPtr cgroup, int controller);
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#endif /* __VIR_CGROUP_H__ */
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#endif /* __VIR_CGROUP_H__ */
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