[PATCH 16/31] proc: move /proc/stat to fs/proc/stat.c
From: Alexey Dobriyan
Date: Sat Oct 04 2008 - 16:01:56 EST
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---
fs/proc/Makefile | 1 +
fs/proc/proc_misc.c | 135 --------------------------------------------
fs/proc/stat.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 155 insertions(+), 135 deletions(-)
create mode 100644 fs/proc/stat.c
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index c91cc9c..13ffa7b 100644
--- 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 24c4f8d..d49b956 100644
--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -197,140 +197,6 @@ 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;
- 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;
-
- per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
- if (!per_irq_sum)
- return -ENOMEM;
-
- user = nice = system = idle = iowait =
- irq = softirq = steal = cputime64_zero;
- guest = cputime64_zero;
- getboottime(&boottime);
- jif = boottime.tv_sec;
-
- for_each_possible_cpu(i) {
- int j;
-
- 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 (j = 0; j < NR_IRQS; j++) {
- unsigned int temp = kstat_cpu(i).irqs[j];
- sum += temp;
- per_irq_sum[j] += temp;
- }
- 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);
-
- for (i = 0; i < NR_IRQS; i++)
- seq_printf(p, " %u", per_irq_sum[i]);
-
- 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());
-
- kfree(per_irq_sum);
- 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
*/
@@ -510,7 +376,6 @@ 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
index 0000000..171642d
--- /dev/null
+++ b/fs/proc/stat.c
@@ -0,0 +1,154 @@
+#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;
+ 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;
+
+ per_irq_sum = kzalloc(sizeof(unsigned int)*NR_IRQS, GFP_KERNEL);
+ if (!per_irq_sum)
+ return -ENOMEM;
+
+ user = nice = system = idle = iowait =
+ irq = softirq = steal = cputime64_zero;
+ guest = cputime64_zero;
+ getboottime(&boottime);
+ jif = boottime.tv_sec;
+
+ for_each_possible_cpu(i) {
+ int j;
+
+ 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 (j = 0; j < NR_IRQS; j++) {
+ unsigned int temp = kstat_cpu(i).irqs[j];
+ sum += temp;
+ per_irq_sum[j] += temp;
+ }
+ 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);
+
+ for (i = 0; i < NR_IRQS; i++)
+ seq_printf(p, " %u", per_irq_sum[i]);
+
+ 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());
+
+ kfree(per_irq_sum);
+ 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);
--
1.5.6.5
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