| /* |
| * drivers/base/node.c - basic Node class support |
| */ |
| |
| #include <linux/sysdev.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/mm.h> |
| #include <linux/node.h> |
| #include <linux/hugetlb.h> |
| #include <linux/cpumask.h> |
| #include <linux/topology.h> |
| #include <linux/nodemask.h> |
| #include <linux/cpu.h> |
| #include <linux/device.h> |
| |
| static struct sysdev_class node_class = { |
| .name = "node", |
| }; |
| |
| |
| static ssize_t node_read_cpumap(struct sys_device *dev, int type, char *buf) |
| { |
| struct node *node_dev = to_node(dev); |
| node_to_cpumask_ptr(mask, node_dev->sysdev.id); |
| int len; |
| |
| /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ |
| BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); |
| |
| len = type? |
| cpulist_scnprintf(buf, PAGE_SIZE-2, *mask): |
| cpumask_scnprintf(buf, PAGE_SIZE-2, *mask); |
| buf[len++] = '\n'; |
| buf[len] = '\0'; |
| return len; |
| } |
| |
| static inline ssize_t node_read_cpumask(struct sys_device *dev, |
| struct sysdev_attribute *attr, char *buf) |
| { |
| return node_read_cpumap(dev, 0, buf); |
| } |
| static inline ssize_t node_read_cpulist(struct sys_device *dev, |
| struct sysdev_attribute *attr, char *buf) |
| { |
| return node_read_cpumap(dev, 1, buf); |
| } |
| |
| static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); |
| static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL); |
| |
| #define K(x) ((x) << (PAGE_SHIFT - 10)) |
| static ssize_t node_read_meminfo(struct sys_device * dev, |
| struct sysdev_attribute *attr, char * buf) |
| { |
| int n; |
| int nid = dev->id; |
| struct sysinfo i; |
| |
| si_meminfo_node(&i, nid); |
| |
| n = sprintf(buf, "\n" |
| "Node %d MemTotal: %8lu kB\n" |
| "Node %d MemFree: %8lu kB\n" |
| "Node %d MemUsed: %8lu kB\n" |
| "Node %d Active: %8lu kB\n" |
| "Node %d Inactive: %8lu kB\n" |
| "Node %d Active(anon): %8lu kB\n" |
| "Node %d Inactive(anon): %8lu kB\n" |
| "Node %d Active(file): %8lu kB\n" |
| "Node %d Inactive(file): %8lu kB\n" |
| #ifdef CONFIG_UNEVICTABLE_LRU |
| "Node %d Unevictable: %8lu kB\n" |
| "Node %d Mlocked: %8lu kB\n" |
| #endif |
| #ifdef CONFIG_HIGHMEM |
| "Node %d HighTotal: %8lu kB\n" |
| "Node %d HighFree: %8lu kB\n" |
| "Node %d LowTotal: %8lu kB\n" |
| "Node %d LowFree: %8lu kB\n" |
| #endif |
| "Node %d Dirty: %8lu kB\n" |
| "Node %d Writeback: %8lu kB\n" |
| "Node %d FilePages: %8lu kB\n" |
| "Node %d Mapped: %8lu kB\n" |
| "Node %d AnonPages: %8lu kB\n" |
| "Node %d PageTables: %8lu kB\n" |
| "Node %d NFS_Unstable: %8lu kB\n" |
| "Node %d Bounce: %8lu kB\n" |
| "Node %d WritebackTmp: %8lu kB\n" |
| "Node %d Slab: %8lu kB\n" |
| "Node %d SReclaimable: %8lu kB\n" |
| "Node %d SUnreclaim: %8lu kB\n", |
| nid, K(i.totalram), |
| nid, K(i.freeram), |
| nid, K(i.totalram - i.freeram), |
| nid, K(node_page_state(nid, NR_ACTIVE_ANON) + |
| node_page_state(nid, NR_ACTIVE_FILE)), |
| nid, K(node_page_state(nid, NR_INACTIVE_ANON) + |
| node_page_state(nid, NR_INACTIVE_FILE)), |
| nid, K(node_page_state(nid, NR_ACTIVE_ANON)), |
| nid, K(node_page_state(nid, NR_INACTIVE_ANON)), |
| nid, K(node_page_state(nid, NR_ACTIVE_FILE)), |
| nid, K(node_page_state(nid, NR_INACTIVE_FILE)), |
| #ifdef CONFIG_UNEVICTABLE_LRU |
| nid, K(node_page_state(nid, NR_UNEVICTABLE)), |
| nid, K(node_page_state(nid, NR_MLOCK)), |
| #endif |
| #ifdef CONFIG_HIGHMEM |
| nid, K(i.totalhigh), |
| nid, K(i.freehigh), |
| nid, K(i.totalram - i.totalhigh), |
| nid, K(i.freeram - i.freehigh), |
| #endif |
| nid, K(node_page_state(nid, NR_FILE_DIRTY)), |
| nid, K(node_page_state(nid, NR_WRITEBACK)), |
| nid, K(node_page_state(nid, NR_FILE_PAGES)), |
| nid, K(node_page_state(nid, NR_FILE_MAPPED)), |
| nid, K(node_page_state(nid, NR_ANON_PAGES)), |
| nid, K(node_page_state(nid, NR_PAGETABLE)), |
| nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), |
| nid, K(node_page_state(nid, NR_BOUNCE)), |
| nid, K(node_page_state(nid, NR_WRITEBACK_TEMP)), |
| nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE) + |
| node_page_state(nid, NR_SLAB_UNRECLAIMABLE)), |
| nid, K(node_page_state(nid, NR_SLAB_RECLAIMABLE)), |
| nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))); |
| n += hugetlb_report_node_meminfo(nid, buf + n); |
| return n; |
| } |
| |
| #undef K |
| static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL); |
| |
| static ssize_t node_read_numastat(struct sys_device * dev, |
| struct sysdev_attribute *attr, char * buf) |
| { |
| return sprintf(buf, |
| "numa_hit %lu\n" |
| "numa_miss %lu\n" |
| "numa_foreign %lu\n" |
| "interleave_hit %lu\n" |
| "local_node %lu\n" |
| "other_node %lu\n", |
| node_page_state(dev->id, NUMA_HIT), |
| node_page_state(dev->id, NUMA_MISS), |
| node_page_state(dev->id, NUMA_FOREIGN), |
| node_page_state(dev->id, NUMA_INTERLEAVE_HIT), |
| node_page_state(dev->id, NUMA_LOCAL), |
| node_page_state(dev->id, NUMA_OTHER)); |
| } |
| static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL); |
| |
| static ssize_t node_read_distance(struct sys_device * dev, |
| struct sysdev_attribute *attr, char * buf) |
| { |
| int nid = dev->id; |
| int len = 0; |
| int i; |
| |
| /* buf currently PAGE_SIZE, need ~4 chars per node */ |
| BUILD_BUG_ON(MAX_NUMNODES*4 > PAGE_SIZE/2); |
| |
| for_each_online_node(i) |
| len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i)); |
| |
| len += sprintf(buf + len, "\n"); |
| return len; |
| } |
| static SYSDEV_ATTR(distance, S_IRUGO, node_read_distance, NULL); |
| |
| |
| /* |
| * register_node - Setup a sysfs device for a node. |
| * @num - Node number to use when creating the device. |
| * |
| * Initialize and register the node device. |
| */ |
| int register_node(struct node *node, int num, struct node *parent) |
| { |
| int error; |
| |
| node->sysdev.id = num; |
| node->sysdev.cls = &node_class; |
| error = sysdev_register(&node->sysdev); |
| |
| if (!error){ |
| sysdev_create_file(&node->sysdev, &attr_cpumap); |
| sysdev_create_file(&node->sysdev, &attr_cpulist); |
| sysdev_create_file(&node->sysdev, &attr_meminfo); |
| sysdev_create_file(&node->sysdev, &attr_numastat); |
| sysdev_create_file(&node->sysdev, &attr_distance); |
| } |
| return error; |
| } |
| |
| /** |
| * unregister_node - unregister a node device |
| * @node: node going away |
| * |
| * Unregisters a node device @node. All the devices on the node must be |
| * unregistered before calling this function. |
| */ |
| void unregister_node(struct node *node) |
| { |
| sysdev_remove_file(&node->sysdev, &attr_cpumap); |
| sysdev_remove_file(&node->sysdev, &attr_cpulist); |
| sysdev_remove_file(&node->sysdev, &attr_meminfo); |
| sysdev_remove_file(&node->sysdev, &attr_numastat); |
| sysdev_remove_file(&node->sysdev, &attr_distance); |
| |
| sysdev_unregister(&node->sysdev); |
| } |
| |
| struct node node_devices[MAX_NUMNODES]; |
| |
| /* |
| * register cpu under node |
| */ |
| int register_cpu_under_node(unsigned int cpu, unsigned int nid) |
| { |
| if (node_online(nid)) { |
| struct sys_device *obj = get_cpu_sysdev(cpu); |
| if (!obj) |
| return 0; |
| return sysfs_create_link(&node_devices[nid].sysdev.kobj, |
| &obj->kobj, |
| kobject_name(&obj->kobj)); |
| } |
| |
| return 0; |
| } |
| |
| int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) |
| { |
| if (node_online(nid)) { |
| struct sys_device *obj = get_cpu_sysdev(cpu); |
| if (obj) |
| sysfs_remove_link(&node_devices[nid].sysdev.kobj, |
| kobject_name(&obj->kobj)); |
| } |
| return 0; |
| } |
| |
| int register_one_node(int nid) |
| { |
| int error = 0; |
| int cpu; |
| |
| if (node_online(nid)) { |
| int p_node = parent_node(nid); |
| struct node *parent = NULL; |
| |
| if (p_node != nid) |
| parent = &node_devices[p_node]; |
| |
| error = register_node(&node_devices[nid], nid, parent); |
| |
| /* link cpu under this node */ |
| for_each_present_cpu(cpu) { |
| if (cpu_to_node(cpu) == nid) |
| register_cpu_under_node(cpu, nid); |
| } |
| } |
| |
| return error; |
| |
| } |
| |
| void unregister_one_node(int nid) |
| { |
| unregister_node(&node_devices[nid]); |
| } |
| |
| /* |
| * node states attributes |
| */ |
| |
| static ssize_t print_nodes_state(enum node_states state, char *buf) |
| { |
| int n; |
| |
| n = nodelist_scnprintf(buf, PAGE_SIZE, node_states[state]); |
| if (n > 0 && PAGE_SIZE > n + 1) { |
| *(buf + n++) = '\n'; |
| *(buf + n++) = '\0'; |
| } |
| return n; |
| } |
| |
| static ssize_t print_nodes_possible(struct sysdev_class *class, char *buf) |
| { |
| return print_nodes_state(N_POSSIBLE, buf); |
| } |
| |
| static ssize_t print_nodes_online(struct sysdev_class *class, char *buf) |
| { |
| return print_nodes_state(N_ONLINE, buf); |
| } |
| |
| static ssize_t print_nodes_has_normal_memory(struct sysdev_class *class, |
| char *buf) |
| { |
| return print_nodes_state(N_NORMAL_MEMORY, buf); |
| } |
| |
| static ssize_t print_nodes_has_cpu(struct sysdev_class *class, char *buf) |
| { |
| return print_nodes_state(N_CPU, buf); |
| } |
| |
| static SYSDEV_CLASS_ATTR(possible, 0444, print_nodes_possible, NULL); |
| static SYSDEV_CLASS_ATTR(online, 0444, print_nodes_online, NULL); |
| static SYSDEV_CLASS_ATTR(has_normal_memory, 0444, print_nodes_has_normal_memory, |
| NULL); |
| static SYSDEV_CLASS_ATTR(has_cpu, 0444, print_nodes_has_cpu, NULL); |
| |
| #ifdef CONFIG_HIGHMEM |
| static ssize_t print_nodes_has_high_memory(struct sysdev_class *class, |
| char *buf) |
| { |
| return print_nodes_state(N_HIGH_MEMORY, buf); |
| } |
| |
| static SYSDEV_CLASS_ATTR(has_high_memory, 0444, print_nodes_has_high_memory, |
| NULL); |
| #endif |
| |
| struct sysdev_class_attribute *node_state_attr[] = { |
| &attr_possible, |
| &attr_online, |
| &attr_has_normal_memory, |
| #ifdef CONFIG_HIGHMEM |
| &attr_has_high_memory, |
| #endif |
| &attr_has_cpu, |
| }; |
| |
| static int node_states_init(void) |
| { |
| int i; |
| int err = 0; |
| |
| for (i = 0; i < NR_NODE_STATES; i++) { |
| int ret; |
| ret = sysdev_class_create_file(&node_class, node_state_attr[i]); |
| if (!err) |
| err = ret; |
| } |
| return err; |
| } |
| |
| static int __init register_node_type(void) |
| { |
| int ret; |
| |
| ret = sysdev_class_register(&node_class); |
| if (!ret) |
| ret = node_states_init(); |
| |
| /* |
| * Note: we're not going to unregister the node class if we fail |
| * to register the node state class attribute files. |
| */ |
| return ret; |
| } |
| postcore_initcall(register_node_type); |