1 files changed, 161 insertions, 0 deletions

diff --git a/drivers/base/node.c b/drivers/base/node.c
new file mode 100644
index 000000000000..583d57ec49a8
--- /dev/null
+++ b/drivers/base/node.c
@@ -0,0 +1,161 @@
+/*
+ * drivers/base/node.c - basic Node class support
+ */
+
+#include <linux/sysdev.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/node.h>
+#include <linux/hugetlb.h>
+#include <linux/cpumask.h>
+#include <linux/topology.h>
+#include <linux/nodemask.h>
+
+static struct sysdev_class node_class = {
+        set_kset_name("node"),
+};
+
+
+static ssize_t node_read_cpumap(struct sys_device * dev, char * buf)
+{
+        struct node *node_dev = to_node(dev);
+        cpumask_t mask = node_to_cpumask(node_dev->sysdev.id);
+        int len;
+
+        /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */
+        BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2);
+
+        len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask);
+        len += sprintf(buf + len, "\n");
+        return len;
+}
+
+static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL);
+
+#define K(x) ((x) << (PAGE_SHIFT - 10))
+static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
+{
+        int n;
+        int nid = dev->id;
+        struct sysinfo i;
+        unsigned long inactive;
+        unsigned long active;
+        unsigned long free;
+
+        si_meminfo_node(&i, nid);
+        __get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
+
+        n = sprintf(buf, "\n"
+                       "Node %d MemTotal:     %8lu kB\n"
+                       "Node %d MemFree:      %8lu kB\n"
+                       "Node %d MemUsed:      %8lu kB\n"
+                       "Node %d Active:       %8lu kB\n"
+                       "Node %d Inactive:     %8lu kB\n"
+                       "Node %d HighTotal:    %8lu kB\n"
+                       "Node %d HighFree:     %8lu kB\n"
+                       "Node %d LowTotal:     %8lu kB\n"
+                       "Node %d LowFree:      %8lu kB\n",
+                       nid, K(i.totalram),
+                       nid, K(i.freeram),
+                       nid, K(i.totalram - i.freeram),
+                       nid, K(active),
+                       nid, K(inactive),
+                       nid, K(i.totalhigh),
+                       nid, K(i.freehigh),
+                       nid, K(i.totalram - i.totalhigh),
+                       nid, K(i.freeram - i.freehigh));
+        n += hugetlb_report_node_meminfo(nid, buf + n);
+        return n;
+}
+
+#undef K
+static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
+
+static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
+{
+        unsigned long numa_hit, numa_miss, interleave_hit, numa_foreign;
+        unsigned long local_node, other_node;
+        int i, cpu;
+        pg_data_t *pg = NODE_DATA(dev->id);
+        numa_hit = 0;
+        numa_miss = 0;
+        interleave_hit = 0;
+        numa_foreign = 0;
+        local_node = 0;
+        other_node = 0;
+        for (i = 0; i < MAX_NR_ZONES; i++) {
+                struct zone *z = &pg->node_zones[i];
+                for (cpu = 0; cpu < NR_CPUS; cpu++) {
+                        struct per_cpu_pageset *ps = &z->pageset[cpu];
+                        numa_hit += ps->numa_hit;
+                        numa_miss += ps->numa_miss;
+                        numa_foreign += ps->numa_foreign;
+                        interleave_hit += ps->interleave_hit;
+                        local_node += ps->local_node;
+                        other_node += ps->other_node;
+                }
+        }
+        return sprintf(buf,
+                       "numa_hit %lu\n"
+                       "numa_miss %lu\n"
+                       "numa_foreign %lu\n"
+                       "interleave_hit %lu\n"
+                       "local_node %lu\n"
+                       "other_node %lu\n",
+                       numa_hit,
+                       numa_miss,
+                       numa_foreign,
+                       interleave_hit,
+                       local_node,
+                       other_node);
+}
+static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
+
+static ssize_t node_read_distance(struct sys_device * dev, char * buf)
+{
+        int nid = dev->id;
+        int len = 0;
+        int i;
+
+        /* buf currently PAGE_SIZE, need ~4 chars per node */
+        BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
+
+        for_each_online_node(i)
+                len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
+
+        len += sprintf(buf + len, "\n");
+        return len;
+}
+static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);
+
+
+/*
+ * register_node - Setup a driverfs device for a node.
+ * @num - Node number to use when creating the device.
+ *
+ * Initialize and register the node device.
+ */
+int __init register_node(struct node *node, int num, struct node *parent)
+{
+        int error;
+
+        node->sysdev.id = num;
+        node->sysdev.cls = &node_class;
+        error = sysdev_register(&node->sysdev);
+
+        if (!error){
+                sysdev_create_file(&node->sysdev, &attr_cpumap);
+                sysdev_create_file(&node->sysdev, &attr_meminfo);
+                sysdev_create_file(&node->sysdev, &attr_numastat);
+                sysdev_create_file(&node->sysdev, &attr_distance);
+        }
+        return error;
+}
+
+
+int __init register_node_type(void)
+{
+        return sysdev_class_register(&node_class);
+}
+postcore_initcall(register_node_type);