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> |
1da177e4 LT |
15 | |
16 | static struct sysdev_class node_class = { | |
17 | set_kset_name("node"), | |
18 | }; | |
19 | ||
20 | ||
21 | static ssize_t node_read_cpumap(struct sys_device * dev, char * buf) | |
22 | { | |
23 | struct node *node_dev = to_node(dev); | |
24 | cpumask_t mask = node_to_cpumask(node_dev->sysdev.id); | |
25 | int len; | |
26 | ||
27 | /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */ | |
28 | BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2); | |
29 | ||
30 | len = cpumask_scnprintf(buf, PAGE_SIZE-1, mask); | |
31 | len += sprintf(buf + len, "\n"); | |
32 | return len; | |
33 | } | |
34 | ||
35 | static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL); | |
36 | ||
37 | #define K(x) ((x) << (PAGE_SHIFT - 10)) | |
38 | static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) | |
39 | { | |
40 | int n; | |
41 | int nid = dev->id; | |
42 | struct sysinfo i; | |
1da177e4 LT |
43 | |
44 | si_meminfo_node(&i, nid); | |
c07e02db | 45 | |
1da177e4 LT |
46 | n = sprintf(buf, "\n" |
47 | "Node %d MemTotal: %8lu kB\n" | |
48 | "Node %d MemFree: %8lu kB\n" | |
49 | "Node %d MemUsed: %8lu kB\n" | |
50 | "Node %d Active: %8lu kB\n" | |
51 | "Node %d Inactive: %8lu kB\n" | |
182e8e23 | 52 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
53 | "Node %d HighTotal: %8lu kB\n" |
54 | "Node %d HighFree: %8lu kB\n" | |
55 | "Node %d LowTotal: %8lu kB\n" | |
c07e02db | 56 | "Node %d LowFree: %8lu kB\n" |
182e8e23 | 57 | #endif |
c07e02db MH |
58 | "Node %d Dirty: %8lu kB\n" |
59 | "Node %d Writeback: %8lu kB\n" | |
347ce434 | 60 | "Node %d FilePages: %8lu kB\n" |
c07e02db | 61 | "Node %d Mapped: %8lu kB\n" |
f3dbd344 | 62 | "Node %d AnonPages: %8lu kB\n" |
df849a15 | 63 | "Node %d PageTables: %8lu kB\n" |
f5ef68da | 64 | "Node %d NFS_Unstable: %8lu kB\n" |
d2c5e30c | 65 | "Node %d Bounce: %8lu kB\n" |
972d1a7b CL |
66 | "Node %d Slab: %8lu kB\n" |
67 | "Node %d SReclaimable: %8lu kB\n" | |
68 | "Node %d SUnreclaim: %8lu kB\n", | |
1da177e4 LT |
69 | nid, K(i.totalram), |
70 | nid, K(i.freeram), | |
71 | nid, K(i.totalram - i.freeram), | |
05a0416b CL |
72 | nid, node_page_state(nid, NR_ACTIVE), |
73 | nid, node_page_state(nid, NR_INACTIVE), | |
182e8e23 | 74 | #ifdef CONFIG_HIGHMEM |
1da177e4 LT |
75 | nid, K(i.totalhigh), |
76 | nid, K(i.freehigh), | |
77 | nid, K(i.totalram - i.totalhigh), | |
c07e02db | 78 | nid, K(i.freeram - i.freehigh), |
182e8e23 | 79 | #endif |
b1e7a8fd | 80 | nid, K(node_page_state(nid, NR_FILE_DIRTY)), |
ce866b34 | 81 | nid, K(node_page_state(nid, NR_WRITEBACK)), |
347ce434 | 82 | nid, K(node_page_state(nid, NR_FILE_PAGES)), |
65ba55f5 | 83 | nid, K(node_page_state(nid, NR_FILE_MAPPED)), |
f3dbd344 | 84 | nid, K(node_page_state(nid, NR_ANON_PAGES)), |
df849a15 | 85 | nid, K(node_page_state(nid, NR_PAGETABLE)), |
fd39fc85 | 86 | nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), |
d2c5e30c | 87 | nid, K(node_page_state(nid, NR_BOUNCE)), |
972d1a7b CL |
88 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) + |
89 | node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), | |
90 | nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)), | |
91 | nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))); | |
1da177e4 LT |
92 | n += hugetlb_report_node_meminfo(nid, buf + n); |
93 | return n; | |
94 | } | |
95 | ||
96 | #undef K | |
97 | static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); | |
98 | ||
99 | static ssize_t node_read_numastat(struct sys_device * dev, char * buf) | |
100 | { | |
1da177e4 LT |
101 | return sprintf(buf, |
102 | "numa_hit %lu\n" | |
103 | "numa_miss %lu\n" | |
104 | "numa_foreign %lu\n" | |
105 | "interleave_hit %lu\n" | |
106 | "local_node %lu\n" | |
107 | "other_node %lu\n", | |
ca889e6c CL |
108 | node_page_state(dev->id, NUMA_HIT), |
109 | node_page_state(dev->id, NUMA_MISS), | |
110 | node_page_state(dev->id, NUMA_FOREIGN), | |
111 | node_page_state(dev->id, NUMA_INTERLEAVE_HIT), | |
112 | node_page_state(dev->id, NUMA_LOCAL), | |
113 | node_page_state(dev->id, NUMA_OTHER)); | |
1da177e4 LT |
114 | } |
115 | static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); | |
116 | ||
117 | static ssize_t node_read_distance(struct sys_device * dev, char * buf) | |
118 | { | |
119 | int nid = dev->id; | |
120 | int len = 0; | |
121 | int i; | |
122 | ||
123 | /* buf currently PAGE_SIZE, need ~4 chars per node */ | |
124 | BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); | |
125 | ||
126 | for_each_online_node(i) | |
127 | len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); | |
128 | ||
129 | len += sprintf(buf + len, "\n"); | |
130 | return len; | |
131 | } | |
132 | static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); | |
133 | ||
134 | ||
135 | /* | |
136 | * register_node - Setup a driverfs device for a node. | |
137 | * @num - Node number to use when creating the device. | |
138 | * | |
139 | * Initialize and register the node device. | |
140 | */ | |
4b45099b | 141 | int register_node(struct node *node, int num, struct node *parent) |
1da177e4 LT |
142 | { |
143 | int error; | |
144 | ||
145 | node->sysdev.id = num; | |
146 | node->sysdev.cls = &node_class; | |
147 | error = sysdev_register(&node->sysdev); | |
148 | ||
149 | if (!error){ | |
150 | sysdev_create_file(&node->sysdev, &attr_cpumap); | |
151 | sysdev_create_file(&node->sysdev, &attr_meminfo); | |
152 | sysdev_create_file(&node->sysdev, &attr_numastat); | |
153 | sysdev_create_file(&node->sysdev, &attr_distance); | |
154 | } | |
155 | return error; | |
156 | } | |
157 | ||
4b45099b KT |
158 | /** |
159 | * unregister_node - unregister a node device | |
160 | * @node: node going away | |
161 | * | |
162 | * Unregisters a node device @node. All the devices on the node must be | |
163 | * unregistered before calling this function. | |
164 | */ | |
165 | void unregister_node(struct node *node) | |
166 | { | |
167 | sysdev_remove_file(&node->sysdev, &attr_cpumap); | |
168 | sysdev_remove_file(&node->sysdev, &attr_meminfo); | |
169 | sysdev_remove_file(&node->sysdev, &attr_numastat); | |
170 | sysdev_remove_file(&node->sysdev, &attr_distance); | |
171 | ||
172 | sysdev_unregister(&node->sysdev); | |
173 | } | |
1da177e4 | 174 | |
0fc44159 YG |
175 | struct node node_devices[MAX_NUMNODES]; |
176 | ||
76b67ed9 KH |
177 | /* |
178 | * register cpu under node | |
179 | */ | |
180 | int register_cpu_under_node(unsigned int cpu, unsigned int nid) | |
181 | { | |
182 | if (node_online(nid)) { | |
183 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
184 | if (!obj) | |
185 | return 0; | |
186 | return sysfs_create_link(&node_devices[nid].sysdev.kobj, | |
187 | &obj->kobj, | |
188 | kobject_name(&obj->kobj)); | |
189 | } | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) | |
195 | { | |
196 | if (node_online(nid)) { | |
197 | struct sys_device *obj = get_cpu_sysdev(cpu); | |
198 | if (obj) | |
199 | sysfs_remove_link(&node_devices[nid].sysdev.kobj, | |
200 | kobject_name(&obj->kobj)); | |
201 | } | |
202 | return 0; | |
203 | } | |
204 | ||
0fc44159 YG |
205 | int register_one_node(int nid) |
206 | { | |
207 | int error = 0; | |
76b67ed9 | 208 | int cpu; |
0fc44159 YG |
209 | |
210 | if (node_online(nid)) { | |
211 | int p_node = parent_node(nid); | |
212 | struct node *parent = NULL; | |
213 | ||
214 | if (p_node != nid) | |
215 | parent = &node_devices[p_node]; | |
216 | ||
217 | error = register_node(&node_devices[nid], nid, parent); | |
76b67ed9 KH |
218 | |
219 | /* link cpu under this node */ | |
220 | for_each_present_cpu(cpu) { | |
221 | if (cpu_to_node(cpu) == nid) | |
222 | register_cpu_under_node(cpu, nid); | |
223 | } | |
0fc44159 YG |
224 | } |
225 | ||
226 | return error; | |
227 | ||
228 | } | |
229 | ||
230 | void unregister_one_node(int nid) | |
231 | { | |
232 | unregister_node(&node_devices[nid]); | |
233 | } | |
234 | ||
4b45099b | 235 | static int __init register_node_type(void) |
1da177e4 LT |
236 | { |
237 | return sysdev_class_register(&node_class); | |
238 | } | |
239 | postcore_initcall(register_node_type); |