99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/pagemap.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/seq_file.h>
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#include <linux/cgroup.h>
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#include <asm/atomic.h>
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#include <asm/uaccess.h>
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#include "cgroupfs.h"
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extern int cpuset_cgroupfs_stat_show(struct seq_file *m, void *v);
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extern int mem_cgroupfs_meminfo_show(struct seq_file *m, void *v);
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extern int cpuacct_cgroupfs_uptime_show(struct seq_file *m, void *v);
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extern int cpuset_cgroupfs_loadavg_show(struct seq_file *m, void *v);
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extern int blkcg_cgroupfs_dkstats_show(struct seq_file *m, void *v);
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extern int mem_cgroupfs_vmstat_show(struct seq_file *m, void *v);
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extern int cpu_get_max_cpus(struct task_struct *p);
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#ifdef CONFIG_X86
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extern int cpuset_cgroupfs_cpuinfo_show(struct seq_file *m, void *v);
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extern int cpuset_cgroupfs_get_cpu_count(void);
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#else
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static inline int cpuset_cgroupfs_cpuinfo_show(struct seq_file *m, void *v)
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{
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return 0;
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}
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static inline int cpuset_cgroupfs_get_cpu_count(void)
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{
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return cpu_get_max_cpus(current);
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}
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#endif
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static int cgroupfs_handle_online_cpu(struct seq_file *m, void *v)
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{
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int cpu = cpu_get_max_cpus(current);
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int cpu_set = cpuset_cgroupfs_get_cpu_count();
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if (cpu > cpu_set)
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cpu = cpu_set;
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if (cpu > nr_cpu_ids)
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cpu = nr_cpu_ids;
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if (cpu == 1)
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seq_printf(m, "0");
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else
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seq_printf(m, "0-%d", cpu - 1);
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seq_putc(m, '\n');
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return 0;
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}
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static int cgroup_fs_show(struct seq_file *m, void *v)
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{
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cgroupfs_entry_t *private = m->private;
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switch (private->cgroupfs_type) {
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case CGROUPFS_TYPE_MEMINFO:
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return mem_cgroupfs_meminfo_show(m, v);
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case CGROUPFS_TYPE_CPUINFO:
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return cpuset_cgroupfs_cpuinfo_show(m, v);
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case CGROUPFS_TYPE_STAT:
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return cpuset_cgroupfs_stat_show(m, v);
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case CGROUPFS_TYPE_UPTIME:
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return cpuacct_cgroupfs_uptime_show(m, v);
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case CGROUPFS_TYPE_LOADAVG:
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return cpuset_cgroupfs_loadavg_show(m, v);
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case CGROUPFS_TYPE_DKSTATS:
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return blkcg_cgroupfs_dkstats_show(m, v);
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case CGROUPFS_TYPE_VMSTAT:
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return mem_cgroupfs_vmstat_show(m, v);
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case CGROUPFS_TYPE_CPU_ONLINE:
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return cgroupfs_handle_online_cpu(m, v);
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default:
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break;
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}
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return 0;
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}
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static int cgroupfs_seq_open(struct inode *inode, struct file *file)
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{
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void *private = inode->i_private;
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return single_open(file, cgroup_fs_show, private);
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}
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static int cgroupfs_seq_release(struct inode *inode, struct file *file)
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{
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return single_release(inode, file);
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}
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static struct file_operations cgroupfs_file_ops = {
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.open = cgroupfs_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = cgroupfs_seq_release,
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};
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void cgroupfs_set_proc_fops(cgroupfs_entry_t *en)
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{
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en->e_fops = &cgroupfs_file_ops;
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};
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