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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> |
af936a16 | 16 | #include <linux/swap.h> |
1da177e4 LT |
17 | |
18 | static struct sysdev_class node_class = { | |
af5ca3f4 | 19 | .name = "node", |
1da177e4 LT |
20 | }; |
21 | ||
22 | ||
39106dcf | 23 | static ssize_t node_read_cpumap(struct sys_device *dev, int type, char *buf) |
1da177e4 LT |
24 | { |
25 | struct node *node_dev = to_node(dev); | |
c5f59f08 | 26 | node_to_cpumask_ptr(mask, node_dev->sysdev.id); |
1da177e4 LT |
27 | int len; |
28 | ||
39106dcf MT |
29 | /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ |
30 | BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); | |
1da177e4 | 31 | |
39106dcf MT |
32 | len = type? |
33 | cpulist_scnprintf(buf, PAGE_SIZE-2, *mask): | |
34 | cpumask_scnprintf(buf, PAGE_SIZE-2, *mask); | |
c5f59f08 MT |
35 | buf[len++] = '\n'; |
36 | buf[len] = '\0'; | |
1da177e4 LT |
37 | return len; |
38 | } | |
39 | ||
4a0b2b4d AK |
40 | static inline ssize_t node_read_cpumask(struct sys_device *dev, |
41 | struct sysdev_attribute *attr, char *buf) | |
39106dcf MT |
42 | { |
43 | return node_read_cpumap(dev, 0, buf); | |
44 | } | |
4a0b2b4d AK |
45 | static inline ssize_t node_read_cpulist(struct sys_device *dev, |
46 | struct sysdev_attribute *attr, char *buf) | |
39106dcf MT |
47 | { |
48 | return node_read_cpumap(dev, 1, buf); | |
49 | } | |
50 | ||
51 | static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); | |
52 | static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL); | |
1da177e4 LT |
53 | |
54 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
4a0b2b4d AK |
55 | static ssize_t node_read_meminfo(struct sys_device * dev, |
56 | struct sysdev_attribute *attr, char * buf) | |
1da177e4 LT |
57 | { |
58 | int n; | |
59 | int nid = dev->id; | |
60 | struct sysinfo i; | |
1da177e4 LT |
61 | |
62 | si_meminfo_node(&i, nid); | |
c07e02db | 63 | |
1da177e4 | 64 | n = sprintf(buf, "\n" |
4f98a2fe RR |
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" | |
7b854121 | 74 | #ifdef CONFIG_UNEVICTABLE_LRU |
5344b7e6 NP |
75 | "Node %d Unevictable: %8lu kB\n" |
76 | "Node %d Mlocked: %8lu kB\n" | |
7b854121 | 77 | #endif |
182e8e23 | 78 | #ifdef CONFIG_HIGHMEM |
4f98a2fe RR |
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" | |
182e8e23 | 83 | #endif |
4f98a2fe RR |
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", | |
1da177e4 LT |
96 | nid, K(i.totalram), |
97 | nid, K(i.freeram), | |
98 | nid, K(i.totalram - i.freeram), | |
4f98a2fe RR |
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)), | |
7b854121 LS |
107 | #ifdef CONFIG_UNEVICTABLE_LRU |
108 | nid, K(node_page_state(nid, NR_UNEVICTABLE)), | |
5344b7e6 | 109 | nid, K(node_page_state(nid, NR_MLOCK)), |
7b854121 | 110 | #endif |
182e8e23 | 111 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
112 | nid, K(i.totalhigh), |
113 | nid, K(i.freehigh), | |
114 | nid, K(i.totalram - i.totalhigh), | |
c07e02db | 115 | nid, K(i.freeram - i.freehigh), |
182e8e23 | 116 | #endif |
b1e7a8fd | 117 | nid, K(node_page_state(nid, NR_FILE_DIRTY)), |
ce866b34 | 118 | nid, K(node_page_state(nid, NR_WRITEBACK)), |
347ce434 | 119 | nid, K(node_page_state(nid, NR_FILE_PAGES)), |
65ba55f5 | 120 | nid, K(node_page_state(nid, NR_FILE_MAPPED)), |
f3dbd344 | 121 | nid, K(node_page_state(nid, NR_ANON_PAGES)), |
df849a15 | 122 | nid, K(node_page_state(nid, NR_PAGETABLE)), |
fd39fc85 | 123 | nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), |
d2c5e30c | 124 | nid, K(node_page_state(nid, NR_BOUNCE)), |
fc3ba692 | 125 | nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)), |
972d1a7b CL |
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))); | |
1da177e4 LT |
130 | n += hugetlb_report_node_meminfo(nid, buf + n); |
131 | return n; | |
132 | } | |
133 | ||
134 | #undef K | |
135 | static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); | |
136 | ||
4a0b2b4d AK |
137 | static ssize_t node_read_numastat(struct sys_device * dev, |
138 | struct sysdev_attribute *attr, char * buf) | |
1da177e4 | 139 | { |
1da177e4 LT |
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", | |
ca889e6c CL |
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)); | |
1da177e4 LT |
153 | } |
154 | static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); | |
155 | ||
4a0b2b4d AK |
156 | static ssize_t node_read_distance(struct sys_device * dev, |
157 | struct sysdev_attribute *attr, char * buf) | |
1da177e4 LT |
158 | { |
159 | int nid = dev->id; | |
160 | int len = 0; | |
161 | int i; | |
162 | ||
163 | /* buf currently PAGE_SIZE, need ~4 chars per node */ | |
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 | } | |
172 | static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); | |
173 | ||
174 | ||
175 | /* | |
405ae7d3 | 176 | * register_node - Setup a sysfs device for a node. |
1da177e4 LT |
177 | * @num - Node number to use when creating the device. |
178 | * | |
179 | * Initialize and register the node device. | |
180 | */ | |
4b45099b | 181 | int register_node(struct node *node, int num, struct node *parent) |
1da177e4 LT |
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); | |
39106dcf | 191 | sysdev_create_file(&node->sysdev, &attr_cpulist); |
1da177e4 LT |
192 | sysdev_create_file(&node->sysdev, &attr_meminfo); |
193 | sysdev_create_file(&node->sysdev, &attr_numastat); | |
194 | sysdev_create_file(&node->sysdev, &attr_distance); | |
af936a16 LS |
195 | |
196 | scan_unevictable_register_node(node); | |
1da177e4 LT |
197 | } |
198 | return error; | |
199 | } | |
200 | ||
4b45099b KT |
201 | /** |
202 | * unregister_node - unregister a node device | |
203 | * @node: node going away | |
204 | * | |
205 | * Unregisters a node device @node. All the devices on the node must be | |
206 | * unregistered before calling this function. | |
207 | */ | |
208 | void unregister_node(struct node *node) | |
209 | { | |
210 | sysdev_remove_file(&node->sysdev, &attr_cpumap); | |
39106dcf | 211 | sysdev_remove_file(&node->sysdev, &attr_cpulist); |
4b45099b KT |
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 | ||
af936a16 LS |
216 | scan_unevictable_unregister_node(node); |
217 | ||
4b45099b KT |
218 | sysdev_unregister(&node->sysdev); |
219 | } | |
1da177e4 | 220 | |
0fc44159 YG |
221 | struct node node_devices[MAX_NUMNODES]; |
222 | ||
76b67ed9 KH |
223 | /* |
224 | * register cpu under node | |
225 | */ | |
226 | int 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 | ||
240 | int 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 | ||
0fc44159 YG |
251 | int register_one_node(int nid) |
252 | { | |
253 | int error = 0; | |
76b67ed9 | 254 | int cpu; |
0fc44159 YG |
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); | |
76b67ed9 KH |
264 | |
265 | /* link cpu under this node */ | |
266 | for_each_present_cpu(cpu) { | |
267 | if (cpu_to_node(cpu) == nid) | |
268 | register_cpu_under_node(cpu, nid); | |
269 | } | |
0fc44159 YG |
270 | } |
271 | ||
272 | return error; | |
273 | ||
274 | } | |
275 | ||
276 | void unregister_one_node(int nid) | |
277 | { | |
278 | unregister_node(&node_devices[nid]); | |
279 | } | |
280 | ||
bde631a5 LS |
281 | /* |
282 | * node states attributes | |
283 | */ | |
284 | ||
285 | static 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 | ||
297 | static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf) | |
298 | { | |
299 | return print_nodes_state(N_POSSIBLE, buf); | |
300 | } | |
301 | ||
302 | static ssize_t print_nodes_online(struct sysdev_class *class, char *buf) | |
303 | { | |
304 | return print_nodes_state(N_ONLINE, buf); | |
305 | } | |
306 | ||
307 | static 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 | ||
313 | static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf) | |
314 | { | |
315 | return print_nodes_state(N_CPU, buf); | |
316 | } | |
317 | ||
318 | static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL); | |
319 | static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL); | |
320 | static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory, | |
321 | NULL); | |
322 | static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL); | |
323 | ||
324 | #ifdef CONFIG_HIGHMEM | |
325 | static 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 | ||
331 | static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory, | |
332 | NULL); | |
333 | #endif | |
334 | ||
335 | struct 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 | ||
345 | static 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 | ||
4b45099b | 359 | static int __init register_node_type(void) |
1da177e4 | 360 | { |
bde631a5 LS |
361 | int ret; |
362 | ||
363 | ret = sysdev_class_register(&node_class); | |
364 | if (!ret) | |
365 | ret = node_states_init(); | |
366 | ||
367 | /* | |
368 | * Note: we're not going to unregister the node class if we fail | |
369 | * to register the node state class attribute files. | |
370 | */ | |
371 | return ret; | |
1da177e4 LT |
372 | } |
373 | postcore_initcall(register_node_type); |