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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 = { | |
18 | set_kset_name("node"), | |
19 | }; | |
20 | ||
21 | ||
22 | static ssize_t node_read_cpumap(struct sys_device * dev, char * buf) | |
23 | { | |
24 | struct node *node_dev = to_node(dev); | |
25 | cpumask_t mask = node_to_cpumask(node_dev->sysdev.id); | |
26 | int len; | |
27 | ||
28 | /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */ | |
29 | BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2); | |
30 | ||
31 | len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask); | |
32 | len += sprintf(buf + len, "\n"); | |
33 | return len; | |
34 | } | |
35 | ||
36 | static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL); | |
37 | ||
38 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
39 | static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) | |
40 | { | |
41 | int n; | |
42 | int nid = dev->id; | |
43 | struct sysinfo i; | |
1da177e4 LT |
44 | |
45 | si_meminfo_node(&i, nid); | |
c07e02db | 46 | |
1da177e4 LT |
47 | n = sprintf(buf, "\n" |
48 | "Node %d MemTotal: %8lu kB\n" | |
49 | "Node %d MemFree: %8lu kB\n" | |
50 | "Node %d MemUsed: %8lu kB\n" | |
51 | "Node %d Active: %8lu kB\n" | |
52 | "Node %d Inactive: %8lu kB\n" | |
182e8e23 | 53 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
54 | "Node %d HighTotal: %8lu kB\n" |
55 | "Node %d HighFree: %8lu kB\n" | |
56 | "Node %d LowTotal: %8lu kB\n" | |
c07e02db | 57 | "Node %d LowFree: %8lu kB\n" |
182e8e23 | 58 | #endif |
c07e02db MH |
59 | "Node %d Dirty: %8lu kB\n" |
60 | "Node %d Writeback: %8lu kB\n" | |
347ce434 | 61 | "Node %d FilePages: %8lu kB\n" |
c07e02db | 62 | "Node %d Mapped: %8lu kB\n" |
f3dbd344 | 63 | "Node %d AnonPages: %8lu kB\n" |
df849a15 | 64 | "Node %d PageTables: %8lu kB\n" |
f5ef68da | 65 | "Node %d NFS_Unstable: %8lu kB\n" |
d2c5e30c | 66 | "Node %d Bounce: %8lu kB\n" |
972d1a7b CL |
67 | "Node %d Slab: %8lu kB\n" |
68 | "Node %d SReclaimable: %8lu kB\n" | |
69 | "Node %d SUnreclaim: %8lu kB\n", | |
1da177e4 LT |
70 | nid, K(i.totalram), |
71 | nid, K(i.freeram), | |
72 | nid, K(i.totalram - i.freeram), | |
05a0416b CL |
73 | nid, node_page_state(nid, NR_ACTIVE), |
74 | nid, node_page_state(nid, NR_INACTIVE), | |
182e8e23 | 75 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
76 | nid, K(i.totalhigh), |
77 | nid, K(i.freehigh), | |
78 | nid, K(i.totalram - i.totalhigh), | |
c07e02db | 79 | nid, K(i.freeram - i.freehigh), |
182e8e23 | 80 | #endif |
b1e7a8fd | 81 | nid, K(node_page_state(nid, NR_FILE_DIRTY)), |
ce866b34 | 82 | nid, K(node_page_state(nid, NR_WRITEBACK)), |
347ce434 | 83 | nid, K(node_page_state(nid, NR_FILE_PAGES)), |
65ba55f5 | 84 | nid, K(node_page_state(nid, NR_FILE_MAPPED)), |
f3dbd344 | 85 | nid, K(node_page_state(nid, NR_ANON_PAGES)), |
df849a15 | 86 | nid, K(node_page_state(nid, NR_PAGETABLE)), |
fd39fc85 | 87 | nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), |
d2c5e30c | 88 | nid, K(node_page_state(nid, NR_BOUNCE)), |
972d1a7b CL |
89 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) + |
90 | node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), | |
91 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)), | |
92 | nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))); | |
1da177e4 LT |
93 | n += hugetlb_report_node_meminfo(nid, buf + n); |
94 | return n; | |
95 | } | |
96 | ||
97 | #undef K | |
98 | static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); | |
99 | ||
100 | static ssize_t node_read_numastat(struct sys_device * dev, char * buf) | |
101 | { | |
1da177e4 LT |
102 | return sprintf(buf, |
103 | "numa_hit %lu\n" | |
104 | "numa_miss %lu\n" | |
105 | "numa_foreign %lu\n" | |
106 | "interleave_hit %lu\n" | |
107 | "local_node %lu\n" | |
108 | "other_node %lu\n", | |
ca889e6c CL |
109 | node_page_state(dev->id, NUMA_HIT), |
110 | node_page_state(dev->id, NUMA_MISS), | |
111 | node_page_state(dev->id, NUMA_FOREIGN), | |
112 | node_page_state(dev->id, NUMA_INTERLEAVE_HIT), | |
113 | node_page_state(dev->id, NUMA_LOCAL), | |
114 | node_page_state(dev->id, NUMA_OTHER)); | |
1da177e4 LT |
115 | } |
116 | static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); | |
117 | ||
118 | static ssize_t node_read_distance(struct sys_device * dev, char * buf) | |
119 | { | |
120 | int nid = dev->id; | |
121 | int len = 0; | |
122 | int i; | |
123 | ||
124 | /* buf currently PAGE_SIZE, need ~4 chars per node */ | |
125 | BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); | |
126 | ||
127 | for_each_online_node(i) | |
128 | len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); | |
129 | ||
130 | len += sprintf(buf + len, "\n"); | |
131 | return len; | |
132 | } | |
133 | static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); | |
134 | ||
135 | ||
136 | /* | |
405ae7d3 | 137 | * register_node - Setup a sysfs device for a node. |
1da177e4 LT |
138 | * @num - Node number to use when creating the device. |
139 | * | |
140 | * Initialize and register the node device. | |
141 | */ | |
4b45099b | 142 | int register_node(struct node *node, int num, struct node *parent) |
1da177e4 LT |
143 | { |
144 | int error; | |
145 | ||
146 | node->sysdev.id = num; | |
147 | node->sysdev.cls = &node_class; | |
148 | error = sysdev_register(&node->sysdev); | |
149 | ||
150 | if (!error){ | |
151 | sysdev_create_file(&node->sysdev, &attr_cpumap); | |
152 | sysdev_create_file(&node->sysdev, &attr_meminfo); | |
153 | sysdev_create_file(&node->sysdev, &attr_numastat); | |
154 | sysdev_create_file(&node->sysdev, &attr_distance); | |
155 | } | |
156 | return error; | |
157 | } | |
158 | ||
4b45099b KT |
159 | /** |
160 | * unregister_node - unregister a node device | |
161 | * @node: node going away | |
162 | * | |
163 | * Unregisters a node device @node. All the devices on the node must be | |
164 | * unregistered before calling this function. | |
165 | */ | |
166 | void unregister_node(struct node *node) | |
167 | { | |
168 | sysdev_remove_file(&node->sysdev, &attr_cpumap); | |
169 | sysdev_remove_file(&node->sysdev, &attr_meminfo); | |
170 | sysdev_remove_file(&node->sysdev, &attr_numastat); | |
171 | sysdev_remove_file(&node->sysdev, &attr_distance); | |
172 | ||
173 | sysdev_unregister(&node->sysdev); | |
174 | } | |
1da177e4 | 175 | |
0fc44159 YG |
176 | struct node node_devices[MAX_NUMNODES]; |
177 | ||
76b67ed9 KH |
178 | /* |
179 | * register cpu under node | |
180 | */ | |
181 | int register_cpu_under_node(unsigned int cpu, unsigned int nid) | |
182 | { | |
183 | if (node_online(nid)) { | |
184 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
185 | if (!obj) | |
186 | return 0; | |
187 | return sysfs_create_link(&node_devices[nid].sysdev.kobj, | |
188 | &obj->kobj, | |
189 | kobject_name(&obj->kobj)); | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) | |
196 | { | |
197 | if (node_online(nid)) { | |
198 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
199 | if (obj) | |
200 | sysfs_remove_link(&node_devices[nid].sysdev.kobj, | |
201 | kobject_name(&obj->kobj)); | |
202 | } | |
203 | return 0; | |
204 | } | |
205 | ||
0fc44159 YG |
206 | int register_one_node(int nid) |
207 | { | |
208 | int error = 0; | |
76b67ed9 | 209 | int cpu; |
0fc44159 YG |
210 | |
211 | if (node_online(nid)) { | |
212 | int p_node = parent_node(nid); | |
213 | struct node *parent = NULL; | |
214 | ||
215 | if (p_node != nid) | |
216 | parent = &node_devices[p_node]; | |
217 | ||
218 | error = register_node(&node_devices[nid], nid, parent); | |
76b67ed9 KH |
219 | |
220 | /* link cpu under this node */ | |
221 | for_each_present_cpu(cpu) { | |
222 | if (cpu_to_node(cpu) == nid) | |
223 | register_cpu_under_node(cpu, nid); | |
224 | } | |
0fc44159 YG |
225 | } |
226 | ||
227 | return error; | |
228 | ||
229 | } | |
230 | ||
231 | void unregister_one_node(int nid) | |
232 | { | |
233 | unregister_node(&node_devices[nid]); | |
234 | } | |
235 | ||
bde631a5 LS |
236 | /* |
237 | * node states attributes | |
238 | */ | |
239 | ||
240 | static ssize_t print_nodes_state(enum node_states state, char *buf) | |
241 | { | |
242 | int n; | |
243 | ||
244 | n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]); | |
245 | if (n > 0 && PAGE_SIZE > n + 1) { | |
246 | *(buf + n++) = '\n'; | |
247 | *(buf + n++) = '\0'; | |
248 | } | |
249 | return n; | |
250 | } | |
251 | ||
252 | static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf) | |
253 | { | |
254 | return print_nodes_state(N_POSSIBLE, buf); | |
255 | } | |
256 | ||
257 | static ssize_t print_nodes_online(struct sysdev_class *class, char *buf) | |
258 | { | |
259 | return print_nodes_state(N_ONLINE, buf); | |
260 | } | |
261 | ||
262 | static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class, | |
263 | char *buf) | |
264 | { | |
265 | return print_nodes_state(N_NORMAL_MEMORY, buf); | |
266 | } | |
267 | ||
268 | static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf) | |
269 | { | |
270 | return print_nodes_state(N_CPU, buf); | |
271 | } | |
272 | ||
273 | static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL); | |
274 | static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL); | |
275 | static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory, | |
276 | NULL); | |
277 | static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL); | |
278 | ||
279 | #ifdef CONFIG_HIGHMEM | |
280 | static ssize_t print_nodes_has_high_memory(struct sysdev_class *class, | |
281 | char *buf) | |
282 | { | |
283 | return print_nodes_state(N_HIGH_MEMORY, buf); | |
284 | } | |
285 | ||
286 | static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory, | |
287 | NULL); | |
288 | #endif | |
289 | ||
290 | struct sysdev_class_attribute *node_state_attr[] = { | |
291 | &attr_possible, | |
292 | &attr_online, | |
293 | &attr_has_normal_memory, | |
294 | #ifdef CONFIG_HIGHMEM | |
295 | &attr_has_high_memory, | |
296 | #endif | |
297 | &attr_has_cpu, | |
298 | }; | |
299 | ||
300 | static int node_states_init(void) | |
301 | { | |
302 | int i; | |
303 | int err = 0; | |
304 | ||
305 | for (i = 0; i < NR_NODE_STATES; i++) { | |
306 | int ret; | |
307 | ret = sysdev_class_create_file(&node_class, node_state_attr[i]); | |
308 | if (!err) | |
309 | err = ret; | |
310 | } | |
311 | return err; | |
312 | } | |
313 | ||
4b45099b | 314 | static int __init register_node_type(void) |
1da177e4 | 315 | { |
bde631a5 LS |
316 | int ret; |
317 | ||
318 | ret = sysdev_class_register(&node_class); | |
319 | if (!ret) | |
320 | ret = node_states_init(); | |
321 | ||
322 | /* | |
323 | * Note: we're not going to unregister the node class if we fail | |
324 | * to register the node state class attribute files. | |
325 | */ | |
326 | return ret; | |
1da177e4 LT |
327 | } |
328 | postcore_initcall(register_node_type); |