proc: move /proc/stat to fs/proc/stat.c

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index c91cc9c..13ffa7b 100644 (file)
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -14,6 +14,7 @@ proc-y        += cpuinfo.o
 proc-y += devices.o
 proc-y += loadavg.o
 proc-y += meminfo.o
+proc-y += stat.o
 proc-y += uptime.o
 proc-y += version.o
 proc-$(CONFIG_PROC_SYSCTL)     += proc_sysctl.o

diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
index 253ea50..a87802f 100644 (file)
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -198,139 +198,6 @@ static const struct file_operations proc_vmalloc_operations = {
 };
 #endif
 
-#ifndef arch_irq_stat_cpu
-#define arch_irq_stat_cpu(cpu) 0
-#endif
-#ifndef arch_irq_stat
-#define arch_irq_stat() 0
-#endif
-
-static int show_stat(struct seq_file *p, void *v)
-{
-       int i, j;
-       unsigned long jif;
-       cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
-       cputime64_t guest;
-       u64 sum = 0;
-       struct timespec boottime;
-       unsigned int per_irq_sum;
-
-       user = nice = system = idle = iowait =
-               irq = softirq = steal = cputime64_zero;
-       guest = cputime64_zero;
-       getboottime(&boottime);
-       jif = boottime.tv_sec;
-
-       for_each_possible_cpu(i) {
-               user = cputime64_add(user, kstat_cpu(i).cpustat.user);
-               nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
-               system = cputime64_add(system, kstat_cpu(i).cpustat.system);
-               idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
-               iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
-               irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
-               softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
-               steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
-               guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
-
-               for_each_irq_nr(j)
-                       sum += kstat_irqs_cpu(j, i);
-
-               sum += arch_irq_stat_cpu(i);
-       }
-       sum += arch_irq_stat();
-
-       seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
-               (unsigned long long)cputime64_to_clock_t(user),
-               (unsigned long long)cputime64_to_clock_t(nice),
-               (unsigned long long)cputime64_to_clock_t(system),
-               (unsigned long long)cputime64_to_clock_t(idle),
-               (unsigned long long)cputime64_to_clock_t(iowait),
-               (unsigned long long)cputime64_to_clock_t(irq),
-               (unsigned long long)cputime64_to_clock_t(softirq),
-               (unsigned long long)cputime64_to_clock_t(steal),
-               (unsigned long long)cputime64_to_clock_t(guest));
-       for_each_online_cpu(i) {
-
-               /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
-               user = kstat_cpu(i).cpustat.user;
-               nice = kstat_cpu(i).cpustat.nice;
-               system = kstat_cpu(i).cpustat.system;
-               idle = kstat_cpu(i).cpustat.idle;
-               iowait = kstat_cpu(i).cpustat.iowait;
-               irq = kstat_cpu(i).cpustat.irq;
-               softirq = kstat_cpu(i).cpustat.softirq;
-               steal = kstat_cpu(i).cpustat.steal;
-               guest = kstat_cpu(i).cpustat.guest;
-               seq_printf(p,
-                       "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
-                       i,
-                       (unsigned long long)cputime64_to_clock_t(user),
-                       (unsigned long long)cputime64_to_clock_t(nice),
-                       (unsigned long long)cputime64_to_clock_t(system),
-                       (unsigned long long)cputime64_to_clock_t(idle),
-                       (unsigned long long)cputime64_to_clock_t(iowait),
-                       (unsigned long long)cputime64_to_clock_t(irq),
-                       (unsigned long long)cputime64_to_clock_t(softirq),
-                       (unsigned long long)cputime64_to_clock_t(steal),
-                       (unsigned long long)cputime64_to_clock_t(guest));
-       }
-       seq_printf(p, "intr %llu", (unsigned long long)sum);
-
-       /* sum again ? it could be updated? */
-       for_each_irq_nr(j) {
-               per_irq_sum = 0;
-
-               for_each_possible_cpu(i)
-                       per_irq_sum += kstat_irqs_cpu(j, i);
-
-               seq_printf(p, " %u", per_irq_sum);
-       }
-
-       seq_printf(p,
-               "\nctxt %llu\n"
-               "btime %lu\n"
-               "processes %lu\n"
-               "procs_running %lu\n"
-               "procs_blocked %lu\n",
-               nr_context_switches(),
-               (unsigned long)jif,
-               total_forks,
-               nr_running(),
-               nr_iowait());
-
-       return 0;
-}
-
-static int stat_open(struct inode *inode, struct file *file)
-{
-       unsigned size = 4096 * (1 + num_possible_cpus() / 32);
-       char *buf;
-       struct seq_file *m;
-       int res;
-
-       /* don't ask for more than the kmalloc() max size, currently 128 KB */
-       if (size > 128 * 1024)
-               size = 128 * 1024;
-       buf = kmalloc(size, GFP_KERNEL);
-       if (!buf)
-               return -ENOMEM;
-
-       res = single_open(file, show_stat, NULL);
-       if (!res) {
-               m = file->private_data;
-               m->buf = buf;
-               m->size = size;
-       } else
-               kfree(buf);
-       return res;
-}
-static const struct file_operations proc_stat_operations = {
-       .open           = stat_open,
-       .read           = seq_read,
-       .llseek         = seq_lseek,
-       .release        = single_release,
-};
-
 /*
  * /proc/interrupts
  */
@@ -508,7 +375,6 @@ void __init proc_misc_init(void)
        proc_symlink("mounts", NULL, "self/mounts");
 
        /* And now for trickier ones */
-       proc_create("stat", 0, NULL, &proc_stat_operations);
        proc_create("interrupts", 0, NULL, &proc_interrupts_operations);
 #ifdef CONFIG_SLABINFO
        proc_create("slabinfo",S_IWUSR|S_IRUGO,NULL,&proc_slabinfo_operations);

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
new file mode 100644 (file)
index 0000000..81904f0
--- /dev/null
+++ b/fs/proc/stat.c
@@ -0,0 +1,153 @@
+#include <linux/cpumask.h>
+#include <linux/fs.h>
+#include <linux/gfp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <asm/cputime.h>
+
+#ifndef arch_irq_stat_cpu
+#define arch_irq_stat_cpu(cpu) 0
+#endif
+#ifndef arch_irq_stat
+#define arch_irq_stat() 0
+#endif
+
+static int show_stat(struct seq_file *p, void *v)
+{
+       int i, j;
+       unsigned long jif;
+       cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
+       cputime64_t guest;
+       u64 sum = 0;
+       struct timespec boottime;
+       unsigned int per_irq_sum;
+
+       user = nice = system = idle = iowait =
+               irq = softirq = steal = cputime64_zero;
+       guest = cputime64_zero;
+       getboottime(&boottime);
+       jif = boottime.tv_sec;
+
+       for_each_possible_cpu(i) {
+               user = cputime64_add(user, kstat_cpu(i).cpustat.user);
+               nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
+               system = cputime64_add(system, kstat_cpu(i).cpustat.system);
+               idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
+               iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
+               irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
+               softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
+               steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
+               guest = cputime64_add(guest, kstat_cpu(i).cpustat.guest);
+
+               for_each_irq_nr(j)
+                       sum += kstat_irqs_cpu(j, i);
+
+               sum += arch_irq_stat_cpu(i);
+       }
+       sum += arch_irq_stat();
+
+       seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
+               (unsigned long long)cputime64_to_clock_t(user),
+               (unsigned long long)cputime64_to_clock_t(nice),
+               (unsigned long long)cputime64_to_clock_t(system),
+               (unsigned long long)cputime64_to_clock_t(idle),
+               (unsigned long long)cputime64_to_clock_t(iowait),
+               (unsigned long long)cputime64_to_clock_t(irq),
+               (unsigned long long)cputime64_to_clock_t(softirq),
+               (unsigned long long)cputime64_to_clock_t(steal),
+               (unsigned long long)cputime64_to_clock_t(guest));
+       for_each_online_cpu(i) {
+
+               /* Copy values here to work around gcc-2.95.3, gcc-2.96 */
+               user = kstat_cpu(i).cpustat.user;
+               nice = kstat_cpu(i).cpustat.nice;
+               system = kstat_cpu(i).cpustat.system;
+               idle = kstat_cpu(i).cpustat.idle;
+               iowait = kstat_cpu(i).cpustat.iowait;
+               irq = kstat_cpu(i).cpustat.irq;
+               softirq = kstat_cpu(i).cpustat.softirq;
+               steal = kstat_cpu(i).cpustat.steal;
+               guest = kstat_cpu(i).cpustat.guest;
+               seq_printf(p,
+                       "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu %llu\n",
+                       i,
+                       (unsigned long long)cputime64_to_clock_t(user),
+                       (unsigned long long)cputime64_to_clock_t(nice),
+                       (unsigned long long)cputime64_to_clock_t(system),
+                       (unsigned long long)cputime64_to_clock_t(idle),
+                       (unsigned long long)cputime64_to_clock_t(iowait),
+                       (unsigned long long)cputime64_to_clock_t(irq),
+                       (unsigned long long)cputime64_to_clock_t(softirq),
+                       (unsigned long long)cputime64_to_clock_t(steal),
+                       (unsigned long long)cputime64_to_clock_t(guest));
+       }
+       seq_printf(p, "intr %llu", (unsigned long long)sum);
+
+       /* sum again ? it could be updated? */
+       for_each_irq_nr(j) {
+               per_irq_sum = 0;
+
+               for_each_possible_cpu(i)
+                       per_irq_sum += kstat_irqs_cpu(j, i);
+
+               seq_printf(p, " %u", per_irq_sum);
+       }
+
+       seq_printf(p,
+               "\nctxt %llu\n"
+               "btime %lu\n"
+               "processes %lu\n"
+               "procs_running %lu\n"
+               "procs_blocked %lu\n",
+               nr_context_switches(),
+               (unsigned long)jif,
+               total_forks,
+               nr_running(),
+               nr_iowait());
+
+       return 0;
+}
+
+static int stat_open(struct inode *inode, struct file *file)
+{
+       unsigned size = 4096 * (1 + num_possible_cpus() / 32);
+       char *buf;
+       struct seq_file *m;
+       int res;
+
+       /* don't ask for more than the kmalloc() max size, currently 128 KB */
+       if (size > 128 * 1024)
+               size = 128 * 1024;
+       buf = kmalloc(size, GFP_KERNEL);
+       if (!buf)
+               return -ENOMEM;
+
+       res = single_open(file, show_stat, NULL);
+       if (!res) {
+               m = file->private_data;
+               m->buf = buf;
+               m->size = size;
+       } else
+               kfree(buf);
+       return res;
+}
+
+static const struct file_operations proc_stat_operations = {
+       .open           = stat_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
+static int __init proc_stat_init(void)
+{
+       proc_create("stat", 0, NULL, &proc_stat_operations);
+       return 0;
+}
+module_init(proc_stat_init);