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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#include <linux/device.h>
16#include <linux/swap.h>
17
18static struct sysdev_class node_class = {
19 .name = "node",
20};
21
22
23static ssize_t node_read_cpumap(struct sys_device *dev, int type, char *buf)
24{
25 struct node *node_dev = to_node(dev);
26 node_to_cpumask_ptr(mask, node_dev->sysdev.id);
27 int len;
28
29
30 BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));
31
32 len = type?
33 cpulist_scnprintf(buf, PAGE_SIZE-2, *mask):
34 cpumask_scnprintf(buf, PAGE_SIZE-2, *mask);
35 buf[len++] = '\n';
36 buf[len] = '\0';
37 return len;
38}
39
40static inline ssize_t node_read_cpumask(struct sys_device *dev,
41 struct sysdev_attribute *attr, char *buf)
42{
43 return node_read_cpumap(dev, 0, buf);
44}
45static inline ssize_t node_read_cpulist(struct sys_device *dev,
46 struct sysdev_attribute *attr, char *buf)
47{
48 return node_read_cpumap(dev, 1, buf);
49}
50
51static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL);
52static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
53
54#define K(x) ((x) << (PAGE_SHIFT - 10))
55static ssize_t node_read_meminfo(struct sys_device * dev,
56 struct sysdev_attribute *attr, char * buf)
57{
58 int n;
59 int nid = dev->id;
60 struct sysinfo i;
61
62 si_meminfo_node(&i, nid);
63
64 n = sprintf(buf, "\n"
65 "Node %d MemTotal: %8lu kB\n"
66 "Node %d MemFree: %8lu kB\n"
67 "Node %d MemUsed: %8lu kB\n"
68 "Node %d Active: %8lu kB\n"
69 "Node %d Inactive: %8lu kB\n"
70 "Node %d Active(anon): %8lu kB\n"
71 "Node %d Inactive(anon): %8lu kB\n"
72 "Node %d Active(file): %8lu kB\n"
73 "Node %d Inactive(file): %8lu kB\n"
74#ifdef CONFIG_UNEVICTABLE_LRU
75 "Node %d Unevictable: %8lu kB\n"
76 "Node %d Mlocked: %8lu kB\n"
77#endif
78#ifdef CONFIG_HIGHMEM
79 "Node %d HighTotal: %8lu kB\n"
80 "Node %d HighFree: %8lu kB\n"
81 "Node %d LowTotal: %8lu kB\n"
82 "Node %d LowFree: %8lu kB\n"
83#endif
84 "Node %d Dirty: %8lu kB\n"
85 "Node %d Writeback: %8lu kB\n"
86 "Node %d FilePages: %8lu kB\n"
87 "Node %d Mapped: %8lu kB\n"
88 "Node %d AnonPages: %8lu kB\n"
89 "Node %d PageTables: %8lu kB\n"
90 "Node %d NFS_Unstable: %8lu kB\n"
91 "Node %d Bounce: %8lu kB\n"
92 "Node %d WritebackTmp: %8lu kB\n"
93 "Node %d Slab: %8lu kB\n"
94 "Node %d SReclaimable: %8lu kB\n"
95 "Node %d SUnreclaim: %8lu kB\n",
96 nid, K(i.totalram),
97 nid, K(i.freeram),
98 nid, K(i.totalram - i.freeram),
99 nid, K(node_page_state(nid, NR_ACTIVE_ANON) +
100 node_page_state(nid, NR_ACTIVE_FILE)),
101 nid, K(node_page_state(nid, NR_INACTIVE_ANON) +
102 node_page_state(nid, NR_INACTIVE_FILE)),
103 nid, K(node_page_state(nid, NR_ACTIVE_ANON)),
104 nid, K(node_page_state(nid, NR_INACTIVE_ANON)),
105 nid, K(node_page_state(nid, NR_ACTIVE_FILE)),
106 nid, K(node_page_state(nid, NR_INACTIVE_FILE)),
107#ifdef CONFIG_UNEVICTABLE_LRU
108 nid, K(node_page_state(nid, NR_UNEVICTABLE)),
109 nid, K(node_page_state(nid, NR_MLOCK)),
110#endif
111#ifdef CONFIG_HIGHMEM
112 nid, K(i.totalhigh),
113 nid, K(i.freehigh),
114 nid, K(i.totalram - i.totalhigh),
115 nid, K(i.freeram - i.freehigh),
116#endif
117 nid, K(node_page_state(nid, NR_FILE_DIRTY)),
118 nid, K(node_page_state(nid, NR_WRITEBACK)),
119 nid, K(node_page_state(nid, NR_FILE_PAGES)),
120 nid, K(node_page_state(nid, NR_FILE_MAPPED)),
121 nid, K(node_page_state(nid, NR_ANON_PAGES)),
122 nid, K(node_page_state(nid, NR_PAGETABLE)),
123 nid, K(node_page_state(nid, NR_UNSTABLE_NFS)),
124 nid, K(node_page_state(nid, NR_BOUNCE)),
125 nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)),
126 nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) +
127 node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
128 nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)),
129 nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
130 n += hugetlb_report_node_meminfo(nid, buf + n);
131 return n;
132}
133
134#undef K
135static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
136
137static ssize_t node_read_numastat(struct sys_device * dev,
138 struct sysdev_attribute *attr, char * buf)
139{
140 return sprintf(buf,
141 "numa_hit %lu\n"
142 "numa_miss %lu\n"
143 "numa_foreign %lu\n"
144 "interleave_hit %lu\n"
145 "local_node %lu\n"
146 "other_node %lu\n",
147 node_page_state(dev->id, NUMA_HIT),
148 node_page_state(dev->id, NUMA_MISS),
149 node_page_state(dev->id, NUMA_FOREIGN),
150 node_page_state(dev->id, NUMA_INTERLEAVE_HIT),
151 node_page_state(dev->id, NUMA_LOCAL),
152 node_page_state(dev->id, NUMA_OTHER));
153}
154static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
155
156static ssize_t node_read_distance(struct sys_device * dev,
157 struct sysdev_attribute *attr, char * buf)
158{
159 int nid = dev->id;
160 int len = 0;
161 int i;
162
163
164 BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2);
165
166 for_each_online_node(i)
167 len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));
168
169 len += sprintf(buf + len, "\n");
170 return len;
171}
172static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL);
173
174
175
176
177
178
179
180
181int register_node(struct node *node, int num, struct node *parent)
182{
183 int error;
184
185 node->sysdev.id = num;
186 node->sysdev.cls = &node_class;
187 error = sysdev_register(&node->sysdev);
188
189 if (!error){
190 sysdev_create_file(&node->sysdev, &attr_cpumap);
191 sysdev_create_file(&node->sysdev, &attr_cpulist);
192 sysdev_create_file(&node->sysdev, &attr_meminfo);
193 sysdev_create_file(&node->sysdev, &attr_numastat);
194 sysdev_create_file(&node->sysdev, &attr_distance);
195
196 scan_unevictable_register_node(node);
197 }
198 return error;
199}
200
201
202
203
204
205
206
207
208void unregister_node(struct node *node)
209{
210 sysdev_remove_file(&node->sysdev, &attr_cpumap);
211 sysdev_remove_file(&node->sysdev, &attr_cpulist);
212 sysdev_remove_file(&node->sysdev, &attr_meminfo);
213 sysdev_remove_file(&node->sysdev, &attr_numastat);
214 sysdev_remove_file(&node->sysdev, &attr_distance);
215
216 scan_unevictable_unregister_node(node);
217
218 sysdev_unregister(&node->sysdev);
219}
220
221struct node node_devices[MAX_NUMNODES];
222
223
224
225
226int register_cpu_under_node(unsigned int cpu, unsigned int nid)
227{
228 if (node_online(nid)) {
229 struct sys_device *obj = get_cpu_sysdev(cpu);
230 if (!obj)
231 return 0;
232 return sysfs_create_link(&node_devices[nid].sysdev.kobj,
233 &obj->kobj,
234 kobject_name(&obj->kobj));
235 }
236
237 return 0;
238}
239
240int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
241{
242 if (node_online(nid)) {
243 struct sys_device *obj = get_cpu_sysdev(cpu);
244 if (obj)
245 sysfs_remove_link(&node_devices[nid].sysdev.kobj,
246 kobject_name(&obj->kobj));
247 }
248 return 0;
249}
250
251int register_one_node(int nid)
252{
253 int error = 0;
254 int cpu;
255
256 if (node_online(nid)) {
257 int p_node = parent_node(nid);
258 struct node *parent = NULL;
259
260 if (p_node != nid)
261 parent = &node_devices[p_node];
262
263 error = register_node(&node_devices[nid], nid, parent);
264
265
266 for_each_present_cpu(cpu) {
267 if (cpu_to_node(cpu) == nid)
268 register_cpu_under_node(cpu, nid);
269 }
270 }
271
272 return error;
273
274}
275
276void unregister_one_node(int nid)
277{
278 unregister_node(&node_devices[nid]);
279}
280
281
282
283
284
285static ssize_t print_nodes_state(enum node_states state, char *buf)
286{
287 int n;
288
289 n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]);
290 if (n > 0 && PAGE_SIZE > n + 1) {
291 *(buf + n++) = '\n';
292 *(buf + n++) = '\0';
293 }
294 return n;
295}
296
297static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf)
298{
299 return print_nodes_state(N_POSSIBLE, buf);
300}
301
302static ssize_t print_nodes_online(struct sysdev_class *class, char *buf)
303{
304 return print_nodes_state(N_ONLINE, buf);
305}
306
307static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class,
308 char *buf)
309{
310 return print_nodes_state(N_NORMAL_MEMORY, buf);
311}
312
313static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf)
314{
315 return print_nodes_state(N_CPU, buf);
316}
317
318static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL);
319static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL);
320static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory,
321 NULL);
322static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL);
323
324#ifdef CONFIG_HIGHMEM
325static ssize_t print_nodes_has_high_memory(struct sysdev_class *class,
326 char *buf)
327{
328 return print_nodes_state(N_HIGH_MEMORY, buf);
329}
330
331static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory,
332 NULL);
333#endif
334
335struct sysdev_class_attribute *node_state_attr[] = {
336 &attr_possible,
337 &attr_online,
338 &attr_has_normal_memory,
339#ifdef CONFIG_HIGHMEM
340 &attr_has_high_memory,
341#endif
342 &attr_has_cpu,
343};
344
345static int node_states_init(void)
346{
347 int i;
348 int err = 0;
349
350 for (i = 0; i < NR_NODE_STATES; i++) {
351 int ret;
352 ret = sysdev_class_create_file(&node_class, node_state_attr[i]);
353 if (!err)
354 err = ret;
355 }
356 return err;
357}
358
359static int __init register_node_type(void)
360{
361 int ret;
362
363 ret = sysdev_class_register(&node_class);
364 if (!ret)
365 ret = node_states_init();
366
367
368
369
370
371 return ret;
372}
373postcore_initcall(register_node_type);
374
