Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee13...
[linux-2.6] / drivers / base / node.c
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>
14 #include <linux/cpu.h>
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
50
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"
57 #ifdef CONFIG_HIGHMEM
58                        "Node %d HighTotal:    %8lu kB\n"
59                        "Node %d HighFree:     %8lu kB\n"
60                        "Node %d LowTotal:     %8lu kB\n"
61                        "Node %d LowFree:      %8lu kB\n"
62 #endif
63                        "Node %d Dirty:        %8lu kB\n"
64                        "Node %d Writeback:    %8lu kB\n"
65                        "Node %d FilePages:    %8lu kB\n"
66                        "Node %d Mapped:       %8lu kB\n"
67                        "Node %d AnonPages:    %8lu kB\n"
68                        "Node %d PageTables:   %8lu kB\n"
69                        "Node %d NFS_Unstable: %8lu kB\n"
70                        "Node %d Bounce:       %8lu kB\n"
71                        "Node %d Slab:         %8lu kB\n"
72                        "Node %d SReclaimable: %8lu kB\n"
73                        "Node %d SUnreclaim:   %8lu kB\n",
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),
79 #ifdef CONFIG_HIGHMEM
80                        nid, K(i.totalhigh),
81                        nid, K(i.freehigh),
82                        nid, K(i.totalram - i.totalhigh),
83                        nid, K(i.freeram - i.freehigh),
84 #endif
85                        nid, K(node_page_state(nid, NR_FILE_DIRTY)),
86                        nid, K(node_page_state(nid, NR_WRITEBACK)),
87                        nid, K(node_page_state(nid, NR_FILE_PAGES)),
88                        nid, K(node_page_state(nid, NR_FILE_MAPPED)),
89                        nid, K(node_page_state(nid, NR_ANON_PAGES)),
90                        nid, K(node_page_state(nid, NR_PAGETABLE)),
91                        nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
92                        nid, K(node_page_state(nid, NR_BOUNCE)),
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)));
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 {
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",
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));
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  */
146 int register_node(struct node *node, int num, struct node *parent)
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
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 }
179
180 struct node node_devices[MAX_NUMNODES];
181
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
210 int register_one_node(int nid)
211 {
212         int error = 0;
213         int cpu;
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);
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                 }
229         }
230
231         return error;
232
233 }
234
235 void unregister_one_node(int nid)
236 {
237         unregister_node(&node_devices[nid]);
238 }
239
240 static int __init register_node_type(void)
241 {
242         return sysdev_class_register(&node_class);
243 }
244 postcore_initcall(register_node_type);