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Commit | Line | Data |
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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> |
bde631a5 | 15 | #include <linux/device.h> |
1da177e4 LT |
16 | |
17 | static struct sysdev_class node_class = { | |
af5ca3f4 | 18 | .name = "node", |
1da177e4 LT |
19 | }; |
20 | ||
21 | ||
39106dcf | 22 | static ssize_t node_read_cpumap(struct sys_device *dev, int type, char *buf) |
1da177e4 LT |
23 | { |
24 | struct node *node_dev = to_node(dev); | |
c5f59f08 | 25 | node_to_cpumask_ptr(mask, node_dev->sysdev.id); |
1da177e4 LT |
26 | int len; |
27 | ||
39106dcf MT |
28 | /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ |
29 | BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); | |
1da177e4 | 30 | |
39106dcf MT |
31 | len = type? |
32 | cpulist_scnprintf(buf, PAGE_SIZE-2, *mask): | |
33 | cpumask_scnprintf(buf, PAGE_SIZE-2, *mask); | |
c5f59f08 MT |
34 | buf[len++] = '\n'; |
35 | buf[len] = '\0'; | |
1da177e4 LT |
36 | return len; |
37 | } | |
38 | ||
4a0b2b4d AK |
39 | static inline ssize_t node_read_cpumask(struct sys_device *dev, |
40 | struct sysdev_attribute *attr, char *buf) | |
39106dcf MT |
41 | { |
42 | return node_read_cpumap(dev, 0, buf); | |
43 | } | |
4a0b2b4d AK |
44 | static inline ssize_t node_read_cpulist(struct sys_device *dev, |
45 | struct sysdev_attribute *attr, char *buf) | |
39106dcf MT |
46 | { |
47 | return node_read_cpumap(dev, 1, buf); | |
48 | } | |
49 | ||
50 | static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); | |
51 | static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL); | |
1da177e4 LT |
52 | |
53 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
4a0b2b4d AK |
54 | static ssize_t node_read_meminfo(struct sys_device * dev, |
55 | struct sysdev_attribute *attr, char * buf) | |
1da177e4 LT |
56 | { |
57 | int n; | |
58 | int nid = dev->id; | |
59 | struct sysinfo i; | |
1da177e4 LT |
60 | |
61 | si_meminfo_node(&i, nid); | |
c07e02db | 62 | |
1da177e4 | 63 | n = sprintf(buf, "\n" |
4f98a2fe RR |
64 | "Node %d MemTotal: %8lu kB\n" |
65 | "Node %d MemFree: %8lu kB\n" | |
66 | "Node %d MemUsed: %8lu kB\n" | |
67 | "Node %d Active: %8lu kB\n" | |
68 | "Node %d Inactive: %8lu kB\n" | |
69 | "Node %d Active(anon): %8lu kB\n" | |
70 | "Node %d Inactive(anon): %8lu kB\n" | |
71 | "Node %d Active(file): %8lu kB\n" | |
72 | "Node %d Inactive(file): %8lu kB\n" | |
182e8e23 | 73 | #ifdef CONFIG_HIGHMEM |
4f98a2fe RR |
74 | "Node %d HighTotal: %8lu kB\n" |
75 | "Node %d HighFree: %8lu kB\n" | |
76 | "Node %d LowTotal: %8lu kB\n" | |
77 | "Node %d LowFree: %8lu kB\n" | |
182e8e23 | 78 | #endif |
4f98a2fe RR |
79 | "Node %d Dirty: %8lu kB\n" |
80 | "Node %d Writeback: %8lu kB\n" | |
81 | "Node %d FilePages: %8lu kB\n" | |
82 | "Node %d Mapped: %8lu kB\n" | |
83 | "Node %d AnonPages: %8lu kB\n" | |
84 | "Node %d PageTables: %8lu kB\n" | |
85 | "Node %d NFS_Unstable: %8lu kB\n" | |
86 | "Node %d Bounce: %8lu kB\n" | |
87 | "Node %d WritebackTmp: %8lu kB\n" | |
88 | "Node %d Slab: %8lu kB\n" | |
89 | "Node %d SReclaimable: %8lu kB\n" | |
90 | "Node %d SUnreclaim: %8lu kB\n", | |
1da177e4 LT |
91 | nid, K(i.totalram), |
92 | nid, K(i.freeram), | |
93 | nid, K(i.totalram - i.freeram), | |
4f98a2fe RR |
94 | nid, K(node_page_state(nid, NR_ACTIVE_ANON) + |
95 | node_page_state(nid, NR_ACTIVE_FILE)), | |
96 | nid, K(node_page_state(nid, NR_INACTIVE_ANON) + | |
97 | node_page_state(nid, NR_INACTIVE_FILE)), | |
98 | nid, K(node_page_state(nid, NR_ACTIVE_ANON)), | |
99 | nid, K(node_page_state(nid, NR_INACTIVE_ANON)), | |
100 | nid, K(node_page_state(nid, NR_ACTIVE_FILE)), | |
101 | nid, K(node_page_state(nid, NR_INACTIVE_FILE)), | |
182e8e23 | 102 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
103 | nid, K(i.totalhigh), |
104 | nid, K(i.freehigh), | |
105 | nid, K(i.totalram - i.totalhigh), | |
c07e02db | 106 | nid, K(i.freeram - i.freehigh), |
182e8e23 | 107 | #endif |
b1e7a8fd | 108 | nid, K(node_page_state(nid, NR_FILE_DIRTY)), |
ce866b34 | 109 | nid, K(node_page_state(nid, NR_WRITEBACK)), |
347ce434 | 110 | nid, K(node_page_state(nid, NR_FILE_PAGES)), |
65ba55f5 | 111 | nid, K(node_page_state(nid, NR_FILE_MAPPED)), |
f3dbd344 | 112 | nid, K(node_page_state(nid, NR_ANON_PAGES)), |
df849a15 | 113 | nid, K(node_page_state(nid, NR_PAGETABLE)), |
fd39fc85 | 114 | nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), |
d2c5e30c | 115 | nid, K(node_page_state(nid, NR_BOUNCE)), |
fc3ba692 | 116 | nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)), |
972d1a7b CL |
117 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) + |
118 | node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), | |
119 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)), | |
120 | nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))); | |
1da177e4 LT |
121 | n += hugetlb_report_node_meminfo(nid, buf + n); |
122 | return n; | |
123 | } | |
124 | ||
125 | #undef K | |
126 | static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); | |
127 | ||
4a0b2b4d AK |
128 | static ssize_t node_read_numastat(struct sys_device * dev, |
129 | struct sysdev_attribute *attr, char * buf) | |
1da177e4 | 130 | { |
1da177e4 LT |
131 | return sprintf(buf, |
132 | "numa_hit %lu\n" | |
133 | "numa_miss %lu\n" | |
134 | "numa_foreign %lu\n" | |
135 | "interleave_hit %lu\n" | |
136 | "local_node %lu\n" | |
137 | "other_node %lu\n", | |
ca889e6c CL |
138 | node_page_state(dev->id, NUMA_HIT), |
139 | node_page_state(dev->id, NUMA_MISS), | |
140 | node_page_state(dev->id, NUMA_FOREIGN), | |
141 | node_page_state(dev->id, NUMA_INTERLEAVE_HIT), | |
142 | node_page_state(dev->id, NUMA_LOCAL), | |
143 | node_page_state(dev->id, NUMA_OTHER)); | |
1da177e4 LT |
144 | } |
145 | static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); | |
146 | ||
4a0b2b4d AK |
147 | static ssize_t node_read_distance(struct sys_device * dev, |
148 | struct sysdev_attribute *attr, char * buf) | |
1da177e4 LT |
149 | { |
150 | int nid = dev->id; | |
151 | int len = 0; | |
152 | int i; | |
153 | ||
154 | /* buf currently PAGE_SIZE, need ~4 chars per node */ | |
155 | BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); | |
156 | ||
157 | for_each_online_node(i) | |
158 | len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); | |
159 | ||
160 | len += sprintf(buf + len, "\n"); | |
161 | return len; | |
162 | } | |
163 | static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); | |
164 | ||
165 | ||
166 | /* | |
405ae7d3 | 167 | * register_node - Setup a sysfs device for a node. |
1da177e4 LT |
168 | * @num - Node number to use when creating the device. |
169 | * | |
170 | * Initialize and register the node device. | |
171 | */ | |
4b45099b | 172 | int register_node(struct node *node, int num, struct node *parent) |
1da177e4 LT |
173 | { |
174 | int error; | |
175 | ||
176 | node->sysdev.id = num; | |
177 | node->sysdev.cls = &node_class; | |
178 | error = sysdev_register(&node->sysdev); | |
179 | ||
180 | if (!error){ | |
181 | sysdev_create_file(&node->sysdev, &attr_cpumap); | |
39106dcf | 182 | sysdev_create_file(&node->sysdev, &attr_cpulist); |
1da177e4 LT |
183 | sysdev_create_file(&node->sysdev, &attr_meminfo); |
184 | sysdev_create_file(&node->sysdev, &attr_numastat); | |
185 | sysdev_create_file(&node->sysdev, &attr_distance); | |
186 | } | |
187 | return error; | |
188 | } | |
189 | ||
4b45099b KT |
190 | /** |
191 | * unregister_node - unregister a node device | |
192 | * @node: node going away | |
193 | * | |
194 | * Unregisters a node device @node. All the devices on the node must be | |
195 | * unregistered before calling this function. | |
196 | */ | |
197 | void unregister_node(struct node *node) | |
198 | { | |
199 | sysdev_remove_file(&node->sysdev, &attr_cpumap); | |
39106dcf | 200 | sysdev_remove_file(&node->sysdev, &attr_cpulist); |
4b45099b KT |
201 | sysdev_remove_file(&node->sysdev, &attr_meminfo); |
202 | sysdev_remove_file(&node->sysdev, &attr_numastat); | |
203 | sysdev_remove_file(&node->sysdev, &attr_distance); | |
204 | ||
205 | sysdev_unregister(&node->sysdev); | |
206 | } | |
1da177e4 | 207 | |
0fc44159 YG |
208 | struct node node_devices[MAX_NUMNODES]; |
209 | ||
76b67ed9 KH |
210 | /* |
211 | * register cpu under node | |
212 | */ | |
213 | int register_cpu_under_node(unsigned int cpu, unsigned int nid) | |
214 | { | |
215 | if (node_online(nid)) { | |
216 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
217 | if (!obj) | |
218 | return 0; | |
219 | return sysfs_create_link(&node_devices[nid].sysdev.kobj, | |
220 | &obj->kobj, | |
221 | kobject_name(&obj->kobj)); | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) | |
228 | { | |
229 | if (node_online(nid)) { | |
230 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
231 | if (obj) | |
232 | sysfs_remove_link(&node_devices[nid].sysdev.kobj, | |
233 | kobject_name(&obj->kobj)); | |
234 | } | |
235 | return 0; | |
236 | } | |
237 | ||
0fc44159 YG |
238 | int register_one_node(int nid) |
239 | { | |
240 | int error = 0; | |
76b67ed9 | 241 | int cpu; |
0fc44159 YG |
242 | |
243 | if (node_online(nid)) { | |
244 | int p_node = parent_node(nid); | |
245 | struct node *parent = NULL; | |
246 | ||
247 | if (p_node != nid) | |
248 | parent = &node_devices[p_node]; | |
249 | ||
250 | error = register_node(&node_devices[nid], nid, parent); | |
76b67ed9 KH |
251 | |
252 | /* link cpu under this node */ | |
253 | for_each_present_cpu(cpu) { | |
254 | if (cpu_to_node(cpu) == nid) | |
255 | register_cpu_under_node(cpu, nid); | |
256 | } | |
0fc44159 YG |
257 | } |
258 | ||
259 | return error; | |
260 | ||
261 | } | |
262 | ||
263 | void unregister_one_node(int nid) | |
264 | { | |
265 | unregister_node(&node_devices[nid]); | |
266 | } | |
267 | ||
bde631a5 LS |
268 | /* |
269 | * node states attributes | |
270 | */ | |
271 | ||
272 | static ssize_t print_nodes_state(enum node_states state, char *buf) | |
273 | { | |
274 | int n; | |
275 | ||
276 | n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]); | |
277 | if (n > 0 && PAGE_SIZE > n + 1) { | |
278 | *(buf + n++) = '\n'; | |
279 | *(buf + n++) = '\0'; | |
280 | } | |
281 | return n; | |
282 | } | |
283 | ||
284 | static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf) | |
285 | { | |
286 | return print_nodes_state(N_POSSIBLE, buf); | |
287 | } | |
288 | ||
289 | static ssize_t print_nodes_online(struct sysdev_class *class, char *buf) | |
290 | { | |
291 | return print_nodes_state(N_ONLINE, buf); | |
292 | } | |
293 | ||
294 | static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class, | |
295 | char *buf) | |
296 | { | |
297 | return print_nodes_state(N_NORMAL_MEMORY, buf); | |
298 | } | |
299 | ||
300 | static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf) | |
301 | { | |
302 | return print_nodes_state(N_CPU, buf); | |
303 | } | |
304 | ||
305 | static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL); | |
306 | static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL); | |
307 | static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory, | |
308 | NULL); | |
309 | static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL); | |
310 | ||
311 | #ifdef CONFIG_HIGHMEM | |
312 | static ssize_t print_nodes_has_high_memory(struct sysdev_class *class, | |
313 | char *buf) | |
314 | { | |
315 | return print_nodes_state(N_HIGH_MEMORY, buf); | |
316 | } | |
317 | ||
318 | static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory, | |
319 | NULL); | |
320 | #endif | |
321 | ||
322 | struct sysdev_class_attribute *node_state_attr[] = { | |
323 | &attr_possible, | |
324 | &attr_online, | |
325 | &attr_has_normal_memory, | |
326 | #ifdef CONFIG_HIGHMEM | |
327 | &attr_has_high_memory, | |
328 | #endif | |
329 | &attr_has_cpu, | |
330 | }; | |
331 | ||
332 | static int node_states_init(void) | |
333 | { | |
334 | int i; | |
335 | int err = 0; | |
336 | ||
337 | for (i = 0; i < NR_NODE_STATES; i++) { | |
338 | int ret; | |
339 | ret = sysdev_class_create_file(&node_class, node_state_attr[i]); | |
340 | if (!err) | |
341 | err = ret; | |
342 | } | |
343 | return err; | |
344 | } | |
345 | ||
4b45099b | 346 | static int __init register_node_type(void) |
1da177e4 | 347 | { |
bde631a5 LS |
348 | int ret; |
349 | ||
350 | ret = sysdev_class_register(&node_class); | |
351 | if (!ret) | |
352 | ret = node_states_init(); | |
353 | ||
354 | /* | |
355 | * Note: we're not going to unregister the node class if we fail | |
356 | * to register the node state class attribute files. | |
357 | */ | |
358 | return ret; | |
1da177e4 LT |
359 | } |
360 | postcore_initcall(register_node_type); |