[net-next-2.6.git] / drivers / base / node.c

/*
 * 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>
#include <linux/cpu.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"
#ifdef CONFIG_HIGHMEM
		       "Node %d HighTotal:    %8lu kB\n"
		       "Node %d HighFree:     %8lu kB\n"
		       "Node %d LowTotal:     %8lu kB\n"
		       "Node %d LowFree:      %8lu kB\n"
#endif
		       "Node %d Dirty:        %8lu kB\n"
		       "Node %d Writeback:    %8lu kB\n"
		       "Node %d FilePages:    %8lu kB\n"
		       "Node %d Mapped:       %8lu kB\n"
		       "Node %d AnonPages:    %8lu kB\n"
		       "Node %d PageTables:   %8lu kB\n"
		       "Node %d NFS_Unstable: %8lu kB\n"
		       "Node %d Bounce:       %8lu kB\n"
		       "Node %d Slab:         %8lu kB\n"
		       "Node %d SReclaimable: %8lu kB\n"
		       "Node %d SUnreclaim:   %8lu kB\n",
		       nid, K(i.totalram),
		       nid, K(i.freeram),
		       nid, K(i.totalram - i.freeram),
		       nid, K(active),
		       nid, K(inactive),
#ifdef CONFIG_HIGHMEM
		       nid, K(i.totalhigh),
		       nid, K(i.freehigh),
		       nid, K(i.totalram - i.totalhigh),
		       nid, K(i.freeram - i.freehigh),
#endif
		       nid, K(node_page_state(nid, NR_FILE_DIRTY)),
		       nid, K(node_page_state(nid, NR_WRITEBACK)),
		       nid, K(node_page_state(nid, NR_FILE_PAGES)),
		       nid, K(node_page_state(nid, NR_FILE_MAPPED)),
		       nid, K(node_page_state(nid, NR_ANON_PAGES)),
		       nid, K(node_page_state(nid, NR_PAGETABLE)),
		       nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
		       nid, K(node_page_state(nid, NR_BOUNCE)),
		       nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
				node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
		       nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
		       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
	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)
{
	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",
		       node_page_state(dev->id, NUMA_HIT),
		       node_page_state(dev->id, NUMA_MISS),
		       node_page_state(dev->id, NUMA_FOREIGN),
		       node_page_state(dev->id, NUMA_INTERLEAVE_HIT),
		       node_page_state(dev->id, NUMA_LOCAL),
		       node_page_state(dev->id, NUMA_OTHER));
}
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 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;
}

/**
 * unregister_node - unregister a node device
 * @node: node going away
 *
 * Unregisters a node device @node.  All the devices on the node must be
 * unregistered before calling this function.
 */
void unregister_node(struct node *node)
{
	sysdev_remove_file(&node->sysdev, &attr_cpumap);
	sysdev_remove_file(&node->sysdev, &attr_meminfo);
	sysdev_remove_file(&node->sysdev, &attr_numastat);
	sysdev_remove_file(&node->sysdev, &attr_distance);

	sysdev_unregister(&node->sysdev);
}

struct node node_devices[MAX_NUMNODES];

/*
 * register cpu under node
 */
int register_cpu_under_node(unsigned int cpu, unsigned int nid)
{
	if (node_online(nid)) {
		struct sys_device *obj = get_cpu_sysdev(cpu);
		if (!obj)
			return 0;
		return sysfs_create_link(&node_devices[nid].sysdev.kobj,
					 &obj->kobj,
					 kobject_name(&obj->kobj));
	 }

	return 0;
}

int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
{
	if (node_online(nid)) {
		struct sys_device *obj = get_cpu_sysdev(cpu);
		if (obj)
			sysfs_remove_link(&node_devices[nid].sysdev.kobj,
					 kobject_name(&obj->kobj));
	}
	return 0;
}

int register_one_node(int nid)
{
	int error = 0;
	int cpu;

	if (node_online(nid)) {
		int p_node = parent_node(nid);
		struct node *parent = NULL;

		if (p_node != nid)
			parent = &node_devices[p_node];

		error = register_node(&node_devices[nid], nid, parent);

		/* link cpu under this node */
		for_each_present_cpu(cpu) {
			if (cpu_to_node(cpu) == nid)
				register_cpu_under_node(cpu, nid);
		}
	}

	return error;

}

void unregister_one_node(int nid)
{
	unregister_node(&node_devices[nid]);
}

static int __init register_node_type(void)
{
	return sysdev_class_register(&node_class);
}
postcore_initcall(register_node_type);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* drivers/base/node.c - basic Node class support
	3	*/
	4
	5	#include <linux/sysdev.h>
	6	#include <linux/module.h>
	7	#include <linux/init.h>
	8	#include <linux/mm.h>
	9	#include <linux/node.h>
	10	#include <linux/hugetlb.h>
	11	#include <linux/cpumask.h>
	12	#include <linux/topology.h>
	13	#include <linux/nodemask.h>
76b67ed9	14	#include <linux/cpu.h>
1da177e4 LT	15
	16	static struct sysdev_class node_class = {
	17	set_kset_name("node"),
	18	};
	19
	20
	21	static ssize_t node_read_cpumap(struct sys_device * dev, char * buf)
	22	{
	23	struct node *node_dev = to_node(dev);
	24	cpumask_t mask = node_to_cpumask(node_dev->sysdev.id);
	25	int len;
	26
	27	/* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */
	28	BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2);
	29
	30	len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask);
	31	len += sprintf(buf + len, "\n");
	32	return len;
	33	}
	34
	35	static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL);
	36
	37	#define K(x) ((x) << (PAGE_SHIFT - 10))
	38	static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
	39	{
	40	int n;
	41	int nid = dev->id;
	42	struct sysinfo i;
	43	unsigned long inactive;
	44	unsigned long active;
	45	unsigned long free;
	46
	47	si_meminfo_node(&i, nid);
	48	__get_zone_counts(&active, &inactive, &free, NODE_DATA(nid));
	49
c07e02db	50
1da177e4 LT	51	n = sprintf(buf, "\n"
	52	"Node %d MemTotal: %8lu kB\n"
	53	"Node %d MemFree: %8lu kB\n"
	54	"Node %d MemUsed: %8lu kB\n"
	55	"Node %d Active: %8lu kB\n"
	56	"Node %d Inactive: %8lu kB\n"
182e8e23	57	#ifdef CONFIG_HIGHMEM
1da177e4 LT	58	"Node %d HighTotal: %8lu kB\n"
	59	"Node %d HighFree: %8lu kB\n"
	60	"Node %d LowTotal: %8lu kB\n"
c07e02db	61	"Node %d LowFree: %8lu kB\n"
182e8e23	62	#endif
c07e02db MH	63	"Node %d Dirty: %8lu kB\n"
c07e02db MH	64	"Node %d Writeback: %8lu kB\n"
347ce434	65	"Node %d FilePages: %8lu kB\n"
c07e02db	66	"Node %d Mapped: %8lu kB\n"
f3dbd344	67	"Node %d AnonPages: %8lu kB\n"
df849a15	68	"Node %d PageTables: %8lu kB\n"
f5ef68da	69	"Node %d NFS_Unstable: %8lu kB\n"
d2c5e30c	70	"Node %d Bounce: %8lu kB\n"
972d1a7b CL	71	"Node %d Slab: %8lu kB\n"
	72	"Node %d SReclaimable: %8lu kB\n"
	73	"Node %d SUnreclaim: %8lu kB\n",
1da177e4 LT	74	nid, K(i.totalram),
	75	nid, K(i.freeram),
	76	nid, K(i.totalram - i.freeram),
	77	nid, K(active),
	78	nid, K(inactive),
182e8e23	79	#ifdef CONFIG_HIGHMEM
1da177e4 LT	80	nid, K(i.totalhigh),
	81	nid, K(i.freehigh),
	82	nid, K(i.totalram - i.totalhigh),
c07e02db	83	nid, K(i.freeram - i.freehigh),
182e8e23	84	#endif
b1e7a8fd	85	nid, K(node_page_state(nid, NR_FILE_DIRTY)),
ce866b34	86	nid, K(node_page_state(nid, NR_WRITEBACK)),
347ce434	87	nid, K(node_page_state(nid, NR_FILE_PAGES)),
65ba55f5	88	nid, K(node_page_state(nid, NR_FILE_MAPPED)),
f3dbd344	89	nid, K(node_page_state(nid, NR_ANON_PAGES)),
df849a15	90	nid, K(node_page_state(nid, NR_PAGETABLE)),
fd39fc85	91	nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
d2c5e30c	92	nid, K(node_page_state(nid, NR_BOUNCE)),
972d1a7b CL	93	nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
	94	node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
	95	nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
	96	nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
1da177e4 LT	97	n += hugetlb_report_node_meminfo(nid, buf + n);
	98	return n;
	99	}
	100
	101	#undef K
	102	static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
	103
	104	static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
	105	{
1da177e4 LT	106	return sprintf(buf,
	107	"numa_hit %lu\n"
	108	"numa_miss %lu\n"
	109	"numa_foreign %lu\n"
	110	"interleave_hit %lu\n"
	111	"local_node %lu\n"
	112	"other_node %lu\n",
ca889e6c CL	113	node_page_state(dev->id, NUMA_HIT),
	114	node_page_state(dev->id, NUMA_MISS),
	115	node_page_state(dev->id, NUMA_FOREIGN),
	116	node_page_state(dev->id, NUMA_INTERLEAVE_HIT),
	117	node_page_state(dev->id, NUMA_LOCAL),
	118	node_page_state(dev->id, NUMA_OTHER));
1da177e4 LT	119	}
	120	static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
	121
	122	static ssize_t node_read_distance(struct sys_device * dev, char * buf)
	123	{
	124	int nid = dev->id;
	125	int len = 0;
	126	int i;
	127
	128	/* buf currently PAGE_SIZE, need ~4 chars per node */
	129	BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
	130
	131	for_each_online_node(i)
	132	len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
	133
	134	len += sprintf(buf + len, "\n");
	135	return len;
	136	}
	137	static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);
	138
	139
	140	/*
	141	* register_node - Setup a driverfs device for a node.
	142	* @num - Node number to use when creating the device.
	143	*
	144	* Initialize and register the node device.
	145	*/
4b45099b	146	int register_node(struct node node, int num, struct node parent)
1da177e4 LT	147	{
	148	int error;
	149
	150	node->sysdev.id = num;
	151	node->sysdev.cls = &node_class;
	152	error = sysdev_register(&node->sysdev);
	153
	154	if (!error){
	155	sysdev_create_file(&node->sysdev, &attr_cpumap);
	156	sysdev_create_file(&node->sysdev, &attr_meminfo);
	157	sysdev_create_file(&node->sysdev, &attr_numastat);
	158	sysdev_create_file(&node->sysdev, &attr_distance);
	159	}
	160	return error;
	161	}
	162
4b45099b KT	163	/**
	164	* unregister_node - unregister a node device
	165	* @node: node going away
	166	*
	167	* Unregisters a node device @node. All the devices on the node must be
	168	* unregistered before calling this function.
	169	*/
	170	void unregister_node(struct node *node)
	171	{
	172	sysdev_remove_file(&node->sysdev, &attr_cpumap);
	173	sysdev_remove_file(&node->sysdev, &attr_meminfo);
	174	sysdev_remove_file(&node->sysdev, &attr_numastat);
	175	sysdev_remove_file(&node->sysdev, &attr_distance);
	176
	177	sysdev_unregister(&node->sysdev);
	178	}
1da177e4	179
0fc44159 YG	180	struct node node_devices[MAX_NUMNODES];
0fc44159 YG	181
76b67ed9 KH	182	/*
	183	* register cpu under node
	184	*/
	185	int register_cpu_under_node(unsigned int cpu, unsigned int nid)
	186	{
	187	if (node_online(nid)) {
	188	struct sys_device *obj = get_cpu_sysdev(cpu);
	189	if (!obj)
	190	return 0;
	191	return sysfs_create_link(&node_devices[nid].sysdev.kobj,
	192	&obj->kobj,
	193	kobject_name(&obj->kobj));
	194	}
	195
	196	return 0;
	197	}
	198
	199	int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
	200	{
	201	if (node_online(nid)) {
	202	struct sys_device *obj = get_cpu_sysdev(cpu);
	203	if (obj)
	204	sysfs_remove_link(&node_devices[nid].sysdev.kobj,
	205	kobject_name(&obj->kobj));
	206	}
	207	return 0;
	208	}
	209
0fc44159 YG	210	int register_one_node(int nid)
	211	{
	212	int error = 0;
76b67ed9	213	int cpu;
0fc44159 YG	214
	215	if (node_online(nid)) {
	216	int p_node = parent_node(nid);
	217	struct node *parent = NULL;
	218
	219	if (p_node != nid)
	220	parent = &node_devices[p_node];
	221
	222	error = register_node(&node_devices[nid], nid, parent);
76b67ed9 KH	223
	224	/* link cpu under this node */
	225	for_each_present_cpu(cpu) {
	226	if (cpu_to_node(cpu) == nid)
	227	register_cpu_under_node(cpu, nid);
	228	}
0fc44159 YG	229	}
	230
	231	return error;
	232
	233	}
	234
	235	void unregister_one_node(int nid)
	236	{
	237	unregister_node(&node_devices[nid]);
	238	}
	239
4b45099b	240	static int __init register_node_type(void)
1da177e4 LT	241	{
	242	return sysdev_class_register(&node_class);
	243	}
	244	postcore_initcall(register_node_type);