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> |
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 | ||
39106dcf MT |
39 | static inline ssize_t node_read_cpumask(struct sys_device *dev, char *buf) |
40 | { | |
41 | return node_read_cpumap(dev, 0, buf); | |
42 | } | |
43 | static inline ssize_t node_read_cpulist(struct sys_device *dev, char *buf) | |
44 | { | |
45 | return node_read_cpumap(dev, 1, buf); | |
46 | } | |
47 | ||
48 | static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); | |
49 | static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL); | |
1da177e4 LT |
50 | |
51 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
52 | static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) | |
53 | { | |
54 | int n; | |
55 | int nid = dev->id; | |
56 | struct sysinfo i; | |
1da177e4 LT |
57 | |
58 | si_meminfo_node(&i, nid); | |
c07e02db | 59 | |
1da177e4 LT |
60 | n = sprintf(buf, "\n" |
61 | "Node %d MemTotal: %8lu kB\n" | |
62 | "Node %d MemFree: %8lu kB\n" | |
63 | "Node %d MemUsed: %8lu kB\n" | |
64 | "Node %d Active: %8lu kB\n" | |
65 | "Node %d Inactive: %8lu kB\n" | |
182e8e23 | 66 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
67 | "Node %d HighTotal: %8lu kB\n" |
68 | "Node %d HighFree: %8lu kB\n" | |
69 | "Node %d LowTotal: %8lu kB\n" | |
c07e02db | 70 | "Node %d LowFree: %8lu kB\n" |
182e8e23 | 71 | #endif |
c07e02db MH |
72 | "Node %d Dirty: %8lu kB\n" |
73 | "Node %d Writeback: %8lu kB\n" | |
347ce434 | 74 | "Node %d FilePages: %8lu kB\n" |
c07e02db | 75 | "Node %d Mapped: %8lu kB\n" |
f3dbd344 | 76 | "Node %d AnonPages: %8lu kB\n" |
df849a15 | 77 | "Node %d PageTables: %8lu kB\n" |
f5ef68da | 78 | "Node %d NFS_Unstable: %8lu kB\n" |
d2c5e30c | 79 | "Node %d Bounce: %8lu kB\n" |
fc3ba692 | 80 | "Node %d WritebackTmp: %8lu kB\n" |
972d1a7b CL |
81 | "Node %d Slab: %8lu kB\n" |
82 | "Node %d SReclaimable: %8lu kB\n" | |
83 | "Node %d SUnreclaim: %8lu kB\n", | |
1da177e4 LT |
84 | nid, K(i.totalram), |
85 | nid, K(i.freeram), | |
86 | nid, K(i.totalram - i.freeram), | |
2d5c1be8 JB |
87 | nid, K(node_page_state(nid, NR_ACTIVE)), |
88 | nid, K(node_page_state(nid, NR_INACTIVE)), | |
182e8e23 | 89 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
90 | nid, K(i.totalhigh), |
91 | nid, K(i.freehigh), | |
92 | nid, K(i.totalram - i.totalhigh), | |
c07e02db | 93 | nid, K(i.freeram - i.freehigh), |
182e8e23 | 94 | #endif |
b1e7a8fd | 95 | nid, K(node_page_state(nid, NR_FILE_DIRTY)), |
ce866b34 | 96 | nid, K(node_page_state(nid, NR_WRITEBACK)), |
347ce434 | 97 | nid, K(node_page_state(nid, NR_FILE_PAGES)), |
65ba55f5 | 98 | nid, K(node_page_state(nid, NR_FILE_MAPPED)), |
f3dbd344 | 99 | nid, K(node_page_state(nid, NR_ANON_PAGES)), |
df849a15 | 100 | nid, K(node_page_state(nid, NR_PAGETABLE)), |
fd39fc85 | 101 | nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), |
d2c5e30c | 102 | nid, K(node_page_state(nid, NR_BOUNCE)), |
fc3ba692 | 103 | nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)), |
972d1a7b CL |
104 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) + |
105 | node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), | |
106 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)), | |
107 | nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))); | |
1da177e4 LT |
108 | n += hugetlb_report_node_meminfo(nid, buf + n); |
109 | return n; | |
110 | } | |
111 | ||
112 | #undef K | |
113 | static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); | |
114 | ||
115 | static ssize_t node_read_numastat(struct sys_device * dev, char * buf) | |
116 | { | |
1da177e4 LT |
117 | return sprintf(buf, |
118 | "numa_hit %lu\n" | |
119 | "numa_miss %lu\n" | |
120 | "numa_foreign %lu\n" | |
121 | "interleave_hit %lu\n" | |
122 | "local_node %lu\n" | |
123 | "other_node %lu\n", | |
ca889e6c CL |
124 | node_page_state(dev->id, NUMA_HIT), |
125 | node_page_state(dev->id, NUMA_MISS), | |
126 | node_page_state(dev->id, NUMA_FOREIGN), | |
127 | node_page_state(dev->id, NUMA_INTERLEAVE_HIT), | |
128 | node_page_state(dev->id, NUMA_LOCAL), | |
129 | node_page_state(dev->id, NUMA_OTHER)); | |
1da177e4 LT |
130 | } |
131 | static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); | |
132 | ||
133 | static ssize_t node_read_distance(struct sys_device * dev, char * buf) | |
134 | { | |
135 | int nid = dev->id; | |
136 | int len = 0; | |
137 | int i; | |
138 | ||
139 | /* buf currently PAGE_SIZE, need ~4 chars per node */ | |
140 | BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); | |
141 | ||
142 | for_each_online_node(i) | |
143 | len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); | |
144 | ||
145 | len += sprintf(buf + len, "\n"); | |
146 | return len; | |
147 | } | |
148 | static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); | |
149 | ||
150 | ||
151 | /* | |
405ae7d3 | 152 | * register_node - Setup a sysfs device for a node. |
1da177e4 LT |
153 | * @num - Node number to use when creating the device. |
154 | * | |
155 | * Initialize and register the node device. | |
156 | */ | |
4b45099b | 157 | int register_node(struct node *node, int num, struct node *parent) |
1da177e4 LT |
158 | { |
159 | int error; | |
160 | ||
161 | node->sysdev.id = num; | |
162 | node->sysdev.cls = &node_class; | |
163 | error = sysdev_register(&node->sysdev); | |
164 | ||
165 | if (!error){ | |
166 | sysdev_create_file(&node->sysdev, &attr_cpumap); | |
39106dcf | 167 | sysdev_create_file(&node->sysdev, &attr_cpulist); |
1da177e4 LT |
168 | sysdev_create_file(&node->sysdev, &attr_meminfo); |
169 | sysdev_create_file(&node->sysdev, &attr_numastat); | |
170 | sysdev_create_file(&node->sysdev, &attr_distance); | |
171 | } | |
172 | return error; | |
173 | } | |
174 | ||
4b45099b KT |
175 | /** |
176 | * unregister_node - unregister a node device | |
177 | * @node: node going away | |
178 | * | |
179 | * Unregisters a node device @node. All the devices on the node must be | |
180 | * unregistered before calling this function. | |
181 | */ | |
182 | void unregister_node(struct node *node) | |
183 | { | |
184 | sysdev_remove_file(&node->sysdev, &attr_cpumap); | |
39106dcf | 185 | sysdev_remove_file(&node->sysdev, &attr_cpulist); |
4b45099b KT |
186 | sysdev_remove_file(&node->sysdev, &attr_meminfo); |
187 | sysdev_remove_file(&node->sysdev, &attr_numastat); | |
188 | sysdev_remove_file(&node->sysdev, &attr_distance); | |
189 | ||
190 | sysdev_unregister(&node->sysdev); | |
191 | } | |
1da177e4 | 192 | |
0fc44159 YG |
193 | struct node node_devices[MAX_NUMNODES]; |
194 | ||
76b67ed9 KH |
195 | /* |
196 | * register cpu under node | |
197 | */ | |
198 | int register_cpu_under_node(unsigned int cpu, unsigned int nid) | |
199 | { | |
200 | if (node_online(nid)) { | |
201 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
202 | if (!obj) | |
203 | return 0; | |
204 | return sysfs_create_link(&node_devices[nid].sysdev.kobj, | |
205 | &obj->kobj, | |
206 | kobject_name(&obj->kobj)); | |
207 | } | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) | |
213 | { | |
214 | if (node_online(nid)) { | |
215 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
216 | if (obj) | |
217 | sysfs_remove_link(&node_devices[nid].sysdev.kobj, | |
218 | kobject_name(&obj->kobj)); | |
219 | } | |
220 | return 0; | |
221 | } | |
222 | ||
0fc44159 YG |
223 | int register_one_node(int nid) |
224 | { | |
225 | int error = 0; | |
76b67ed9 | 226 | int cpu; |
0fc44159 YG |
227 | |
228 | if (node_online(nid)) { | |
229 | int p_node = parent_node(nid); | |
230 | struct node *parent = NULL; | |
231 | ||
232 | if (p_node != nid) | |
233 | parent = &node_devices[p_node]; | |
234 | ||
235 | error = register_node(&node_devices[nid], nid, parent); | |
76b67ed9 KH |
236 | |
237 | /* link cpu under this node */ | |
238 | for_each_present_cpu(cpu) { | |
239 | if (cpu_to_node(cpu) == nid) | |
240 | register_cpu_under_node(cpu, nid); | |
241 | } | |
0fc44159 YG |
242 | } |
243 | ||
244 | return error; | |
245 | ||
246 | } | |
247 | ||
248 | void unregister_one_node(int nid) | |
249 | { | |
250 | unregister_node(&node_devices[nid]); | |
251 | } | |
252 | ||
bde631a5 LS |
253 | /* |
254 | * node states attributes | |
255 | */ | |
256 | ||
257 | static ssize_t print_nodes_state(enum node_states state, char *buf) | |
258 | { | |
259 | int n; | |
260 | ||
261 | n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]); | |
262 | if (n > 0 && PAGE_SIZE > n + 1) { | |
263 | *(buf + n++) = '\n'; | |
264 | *(buf + n++) = '\0'; | |
265 | } | |
266 | return n; | |
267 | } | |
268 | ||
269 | static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf) | |
270 | { | |
271 | return print_nodes_state(N_POSSIBLE, buf); | |
272 | } | |
273 | ||
274 | static ssize_t print_nodes_online(struct sysdev_class *class, char *buf) | |
275 | { | |
276 | return print_nodes_state(N_ONLINE, buf); | |
277 | } | |
278 | ||
279 | static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class, | |
280 | char *buf) | |
281 | { | |
282 | return print_nodes_state(N_NORMAL_MEMORY, buf); | |
283 | } | |
284 | ||
285 | static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf) | |
286 | { | |
287 | return print_nodes_state(N_CPU, buf); | |
288 | } | |
289 | ||
290 | static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL); | |
291 | static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL); | |
292 | static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory, | |
293 | NULL); | |
294 | static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL); | |
295 | ||
296 | #ifdef CONFIG_HIGHMEM | |
297 | static ssize_t print_nodes_has_high_memory(struct sysdev_class *class, | |
298 | char *buf) | |
299 | { | |
300 | return print_nodes_state(N_HIGH_MEMORY, buf); | |
301 | } | |
302 | ||
303 | static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory, | |
304 | NULL); | |
305 | #endif | |
306 | ||
307 | struct sysdev_class_attribute *node_state_attr[] = { | |
308 | &attr_possible, | |
309 | &attr_online, | |
310 | &attr_has_normal_memory, | |
311 | #ifdef CONFIG_HIGHMEM | |
312 | &attr_has_high_memory, | |
313 | #endif | |
314 | &attr_has_cpu, | |
315 | }; | |
316 | ||
317 | static int node_states_init(void) | |
318 | { | |
319 | int i; | |
320 | int err = 0; | |
321 | ||
322 | for (i = 0; i < NR_NODE_STATES; i++) { | |
323 | int ret; | |
324 | ret = sysdev_class_create_file(&node_class, node_state_attr[i]); | |
325 | if (!err) | |
326 | err = ret; | |
327 | } | |
328 | return err; | |
329 | } | |
330 | ||
4b45099b | 331 | static int __init register_node_type(void) |
1da177e4 | 332 | { |
bde631a5 LS |
333 | int ret; |
334 | ||
335 | ret = sysdev_class_register(&node_class); | |
336 | if (!ret) | |
337 | ret = node_states_init(); | |
338 | ||
339 | /* | |
340 | * Note: we're not going to unregister the node class if we fail | |
341 | * to register the node state class attribute files. | |
342 | */ | |
343 | return ret; | |
1da177e4 LT |
344 | } |
345 | postcore_initcall(register_node_type); |