1 files changed, 74 insertions, 0 deletions
diff --git a/src/pmdas/linux_proc/cgroups.h b/src/pmdas/linux_proc/cgroups.h
new file mode 100644
index 0000000..d2ec430
--- /dev/null
+++ b/src/pmdas/linux_proc/cgroups.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2013-2014 Red Hat.
+ * Copyright (c) 2010 Aconex.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+#ifndef _CGROUP_H
+#define _CGROUP_H
+
+/*
+ * Note: cgroup metrics have an "extra" component - the cluster part
+ * of the PMID (12 bits) is split into two (6 bits each): the bottom
+ * part contains the regular metric (cluster) ID while the top holds
+ * the cgroup ID (index - e.g. this is the 3rd cgroup we've seen for
+ * a particular subsystem).
+ */
+
+#define CGROUP_SPLIT	6
+#define CGROUP_MASK	((1 << CGROUP_SPLIT) - 1)
+
+static inline pmID
+cgroup_pmid_build(unsigned int domain, unsigned int cluster,
+		  unsigned int gid, unsigned int metric)
+{
+    return pmid_build(domain, (gid << CGROUP_SPLIT) | cluster, metric);
+}
+
+static inline unsigned int
+cgroup_pmid_group(pmID id)
+{
+    return pmid_cluster(id) >> CGROUP_SPLIT;
+}
+
+static inline unsigned int
+proc_pmid_cluster(pmID id)
+{
+    return pmid_cluster(id) & CGROUP_MASK;
+}
+
+static inline unsigned int
+cgroup_pmid_metric(pmID id)
+{
+    return pmid_item(id);
+}
+
+/*
+ * General cgroup interfaces
+ */
+extern void cgroup_init(pmdaMetric *, int);
+extern char *cgroup_find_subsys(pmInDom, void *);
+extern int cgroup_group_fetch(pmID, unsigned int, pmAtomValue *);
+
+/*
+ * Metric name and value refresh interfaces
+ */
+extern int refresh_cgroups(pmdaExt *, __pmnsTree **);
+
+/*
+ * Indom-specific interfaces
+ */
+extern void refresh_cgroup_cpus(pmInDom);
+extern void refresh_cgroup_devices(pmInDom);
+extern void refresh_cgroup_filesys(pmInDom);
+extern void refresh_cgroup_subsys(pmInDom);
+
+#endif /* _CGROUP_H */