Release 4.11 drivers/s390/block/dasd_proc.c
/*
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Horst Hummel <Horst.Hummel@de.ibm.com>
* Carsten Otte <Cotte@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* Coypright IBM Corp. 1999, 2002
*
* /proc interface for the dasd driver.
*
*/
#define KMSG_COMPONENT "dasd"
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/seq_file.h>
#include <linux/vmalloc.h>
#include <linux/proc_fs.h>
#include <asm/debug.h>
#include <linux/uaccess.h>
/* This is ugly... */
#define PRINTK_HEADER "dasd_proc:"
#include "dasd_int.h"
static struct proc_dir_entry *dasd_proc_root_entry = NULL;
static struct proc_dir_entry *dasd_devices_entry = NULL;
static struct proc_dir_entry *dasd_statistics_entry = NULL;
static int
dasd_devices_show(struct seq_file *m, void *v)
{
struct dasd_device *device;
struct dasd_block *block;
char *substr;
device = dasd_device_from_devindex((unsigned long) v - 1);
if (IS_ERR(device))
return 0;
if (device->block)
block = device->block;
else {
dasd_put_device(device);
return 0;
}
/* Print device number. */
seq_printf(m, "%s", dev_name(&device->cdev->dev));
/* Print discipline string. */
if (device->discipline != NULL)
seq_printf(m, "(%s)", device->discipline->name);
else
seq_printf(m, "(none)");
/* Print kdev. */
if (block->gdp)
seq_printf(m, " at (%3d:%6d)",
MAJOR(disk_devt(block->gdp)),
MINOR(disk_devt(block->gdp)));
else
seq_printf(m, " at (???:??????)");
/* Print device name. */
if (block->gdp)
seq_printf(m, " is %-8s", block->gdp->disk_name);
else
seq_printf(m, " is ????????");
/* Print devices features. */
substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " ";
seq_printf(m, "%4s: ", substr);
/* Print device status information. */
switch (device->state) {
case DASD_STATE_NEW:
seq_printf(m, "new");
break;
case DASD_STATE_KNOWN:
seq_printf(m, "detected");
break;
case DASD_STATE_BASIC:
seq_printf(m, "basic");
break;
case DASD_STATE_UNFMT:
seq_printf(m, "unformatted");
break;
case DASD_STATE_READY:
case DASD_STATE_ONLINE:
seq_printf(m, "active ");
if (dasd_check_blocksize(block->bp_block))
seq_printf(m, "n/f ");
else
seq_printf(m,
"at blocksize: %d, %lld blocks, %lld MB",
block->bp_block, block->blocks,
((block->bp_block >> 9) *
block->blocks) >> 11);
break;
default:
seq_printf(m, "no stat");
break;
}
dasd_put_device(device);
if (dasd_probeonly)
seq_printf(m, "(probeonly)");
seq_printf(m, "\n");
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 267 | 72.75% | 7 | 41.18% |
Stefan Weinhuber | 39 | 10.63% | 3 | 17.65% |
Andrew Morton | 28 | 7.63% | 1 | 5.88% |
Horst Hummel | 17 | 4.63% | 4 | 23.53% |
Tejun Heo | 12 | 3.27% | 1 | 5.88% |
Kay Sievers | 4 | 1.09% | 1 | 5.88% |
Total | 367 | 100.00% | 17 | 100.00% |
static void *dasd_devices_start(struct seq_file *m, loff_t *pos)
{
if (*pos >= dasd_max_devindex)
return NULL;
return (void *)((unsigned long) *pos + 1);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 42 | 100.00% | 2 | 100.00% |
Total | 42 | 100.00% | 2 | 100.00% |
static void *dasd_devices_next(struct seq_file *m, void *v, loff_t *pos)
{
++*pos;
return dasd_devices_start(m, pos);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 32 | 100.00% | 2 | 100.00% |
Total | 32 | 100.00% | 2 | 100.00% |
static void dasd_devices_stop(struct seq_file *m, void *v)
{
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 14 | 100.00% | 2 | 100.00% |
Total | 14 | 100.00% | 2 | 100.00% |
static const struct seq_operations dasd_devices_seq_ops = {
.start = dasd_devices_start,
.next = dasd_devices_next,
.stop = dasd_devices_stop,
.show = dasd_devices_show,
};
static int dasd_devices_open(struct inode *inode, struct file *file)
{
return seq_open(file, &dasd_devices_seq_ops);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 25 | 100.00% | 2 | 100.00% |
Total | 25 | 100.00% | 2 | 100.00% |
static const struct file_operations dasd_devices_file_ops = {
.owner = THIS_MODULE,
.open = dasd_devices_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
#ifdef CONFIG_DASD_PROFILE
static int dasd_stats_all_block_on(void)
{
int i, rc;
struct dasd_device *device;
rc = 0;
for (i = 0; i < dasd_max_devindex; ++i) {
device = dasd_device_from_devindex(i);
if (IS_ERR(device))
continue;
if (device->block)
rc = dasd_profile_on(&device->block->profile);
dasd_put_device(device);
if (rc)
return rc;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stefan Weinhuber | 85 | 100.00% | 1 | 100.00% |
Total | 85 | 100.00% | 1 | 100.00% |
static void dasd_stats_all_block_off(void)
{
int i;
struct dasd_device *device;
for (i = 0; i < dasd_max_devindex; ++i) {
device = dasd_device_from_devindex(i);
if (IS_ERR(device))
continue;
if (device->block)
dasd_profile_off(&device->block->profile);
dasd_put_device(device);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stefan Weinhuber | 67 | 100.00% | 1 | 100.00% |
Total | 67 | 100.00% | 1 | 100.00% |
static void dasd_stats_all_block_reset(void)
{
int i;
struct dasd_device *device;
for (i = 0; i < dasd_max_devindex; ++i) {
device = dasd_device_from_devindex(i);
if (IS_ERR(device))
continue;
if (device->block)
dasd_profile_reset(&device->block->profile);
dasd_put_device(device);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stefan Weinhuber | 67 | 100.00% | 1 | 100.00% |
Total | 67 | 100.00% | 1 | 100.00% |
static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor)
{
int i;
for (i = 0; i < 32; i++) {
seq_printf(m, "%7d ", array[i] / factor);
if (i == 15)
seq_putc(m, '\n');
}
seq_putc(m, '\n');
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 54 | 76.06% | 1 | 25.00% |
Alexey Dobriyan | 13 | 18.31% | 1 | 25.00% |
Stefan Haberland | 3 | 4.23% | 1 | 25.00% |
Heiko Carstens | 1 | 1.41% | 1 | 25.00% |
Total | 71 | 100.00% | 4 | 100.00% |
#endif /* CONFIG_DASD_PROFILE */
static int dasd_stats_proc_show(struct seq_file *m, void *v)
{
#ifdef CONFIG_DASD_PROFILE
struct dasd_profile_info *prof;
int factor;
spin_lock_bh(&dasd_global_profile.lock);
prof = dasd_global_profile.data;
if (!prof) {
spin_unlock_bh(&dasd_global_profile.lock);
seq_printf(m, "Statistics are off - they might be "
"switched on using 'echo set on > "
"/proc/dasd/statistics'\n");
return 0;
}
/* prevent counter 'overflow' on output */
for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
factor *= 10);
seq_printf(m, "%d dasd I/O requests\n", prof->dasd_io_reqs);
seq_printf(m, "with %u sectors(512B each)\n",
prof->dasd_io_sects);
seq_printf(m, "Scale Factor is %d\n", factor);
seq_printf(m,
" __<4 ___8 __16 __32 __64 _128 "
" _256 _512 __1k __2k __4k __8k "
" _16k _32k _64k 128k\n");
seq_printf(m,
" _256 _512 __1M __2M __4M __8M "
" _16M _32M _64M 128M 256M 512M "
" __1G __2G __4G " " _>4G\n");
seq_printf(m, "Histogram of sizes (512B secs)\n");
dasd_statistics_array(m, prof->dasd_io_secs, factor);
seq_printf(m, "Histogram of I/O times (microseconds)\n");
dasd_statistics_array(m, prof->dasd_io_times, factor);
seq_printf(m, "Histogram of I/O times per sector\n");
dasd_statistics_array(m, prof->dasd_io_timps, factor);
seq_printf(m, "Histogram of I/O time till ssch\n");
dasd_statistics_array(m, prof->dasd_io_time1, factor);
seq_printf(m, "Histogram of I/O time between ssch and irq\n");
dasd_statistics_array(m, prof->dasd_io_time2, factor);
seq_printf(m, "Histogram of I/O time between ssch "
"and irq per sector\n");
dasd_statistics_array(m, prof->dasd_io_time2ps, factor);
seq_printf(m, "Histogram of I/O time between irq and end\n");
dasd_statistics_array(m, prof->dasd_io_time3, factor);
seq_printf(m, "# of req in chanq at enqueuing (1..32) \n");
dasd_statistics_array(m, prof->dasd_io_nr_req, factor);
spin_unlock_bh(&dasd_global_profile.lock);
#else
seq_printf(m, "Statistics are not activated in this kernel\n");
#endif
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 201 | 65.69% | 3 | 33.33% |
Alexey Dobriyan | 47 | 15.36% | 1 | 11.11% |
Sebastian Ott | 31 | 10.13% | 2 | 22.22% |
Stefan Haberland | 24 | 7.84% | 1 | 11.11% |
Stefan Weinhuber | 2 | 0.65% | 1 | 11.11% |
Uwe Kleine-König | 1 | 0.33% | 1 | 11.11% |
Total | 306 | 100.00% | 9 | 100.00% |
static int dasd_stats_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, dasd_stats_proc_show, NULL);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Alexey Dobriyan | 20 | 76.92% | 1 | 33.33% |
Martin Schwidefsky | 6 | 23.08% | 2 | 66.67% |
Total | 26 | 100.00% | 3 | 100.00% |
static ssize_t dasd_stats_proc_write(struct file *file,
const char __user *user_buf, size_t user_len, loff_t *pos)
{
#ifdef CONFIG_DASD_PROFILE
char *buffer, *str;
int rc;
if (user_len > 65536)
user_len = 65536;
buffer = dasd_get_user_string(user_buf, user_len);
if (IS_ERR(buffer))
return PTR_ERR(buffer);
/* check for valid verbs */
str = skip_spaces(buffer);
if (strncmp(str, "set", 3) == 0 && isspace(str[3])) {
/* 'set xxx' was given */
str = skip_spaces(str + 4);
if (strcmp(str, "on") == 0) {
/* switch on statistics profiling */
rc = dasd_stats_all_block_on();
if (rc) {
dasd_stats_all_block_off();
goto out_error;
}
rc = dasd_profile_on(&dasd_global_profile);
if (rc) {
dasd_stats_all_block_off();
goto out_error;
}
dasd_profile_reset(&dasd_global_profile);
dasd_global_profile_level = DASD_PROFILE_ON;
pr_info("The statistics feature has been switched "
"on\n");
} else if (strcmp(str, "off") == 0) {
/* switch off statistics profiling */
dasd_global_profile_level = DASD_PROFILE_OFF;
dasd_profile_off(&dasd_global_profile);
dasd_stats_all_block_off();
pr_info("The statistics feature has been switched "
"off\n");
} else
goto out_parse_error;
} else if (strncmp(str, "reset", 5) == 0) {
/* reset the statistics */
dasd_profile_reset(&dasd_global_profile);
dasd_stats_all_block_reset();
pr_info("The statistics have been reset\n");
} else
goto out_parse_error;
vfree(buffer);
return user_len;
out_parse_error:
rc = -EINVAL;
pr_warn("%s is not a supported value for /proc/dasd/statistics\n", str);
out_error:
vfree(buffer);
return rc;
#else
pr_warn("/proc/dasd/statistics: is not activated in this kernel\n");
return user_len;
#endif /* CONFIG_DASD_PROFILE */
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 178 | 60.34% | 2 | 18.18% |
Stefan Weinhuber | 44 | 14.92% | 2 | 18.18% |
Sebastian Ott | 35 | 11.86% | 1 | 9.09% |
Heiko Carstens | 13 | 4.41% | 1 | 9.09% |
Stefan Haberland | 11 | 3.73% | 1 | 9.09% |
André Goddard Rosa | 6 | 2.03% | 1 | 9.09% |
Alexey Dobriyan | 5 | 1.69% | 1 | 9.09% |
Joe Perches | 2 | 0.68% | 1 | 9.09% |
Andrew Morton | 1 | 0.34% | 1 | 9.09% |
Total | 295 | 100.00% | 11 | 100.00% |
static const struct file_operations dasd_stats_proc_fops = {
.owner = THIS_MODULE,
.open = dasd_stats_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = dasd_stats_proc_write,
};
/*
* Create dasd proc-fs entries.
* In case creation failed, cleanup and return -ENOENT.
*/
int
dasd_proc_init(void)
{
dasd_proc_root_entry = proc_mkdir("dasd", NULL);
if (!dasd_proc_root_entry)
goto out_nodasd;
dasd_devices_entry = proc_create("devices",
S_IFREG | S_IRUGO | S_IWUSR,
dasd_proc_root_entry,
&dasd_devices_file_ops);
if (!dasd_devices_entry)
goto out_nodevices;
dasd_statistics_entry = proc_create("statistics",
S_IFREG | S_IRUGO | S_IWUSR,
dasd_proc_root_entry,
&dasd_stats_proc_fops);
if (!dasd_statistics_entry)
goto out_nostatistics;
return 0;
out_nostatistics:
remove_proc_entry("devices", dasd_proc_root_entry);
out_nodevices:
remove_proc_entry("dasd", NULL);
out_nodasd:
return -ENOENT;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Horst Hummel | 47 | 45.63% | 1 | 20.00% |
Martin Schwidefsky | 46 | 44.66% | 1 | 20.00% |
Alexey Dobriyan | 6 | 5.83% | 2 | 40.00% |
Denis V. Lunev | 4 | 3.88% | 1 | 20.00% |
Total | 103 | 100.00% | 5 | 100.00% |
void
dasd_proc_exit(void)
{
remove_proc_entry("devices", dasd_proc_root_entry);
remove_proc_entry("statistics", dasd_proc_root_entry);
remove_proc_entry("dasd", NULL);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 27 | 96.43% | 1 | 50.00% |
Alexey Dobriyan | 1 | 3.57% | 1 | 50.00% |
Total | 28 | 100.00% | 2 | 100.00% |
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin Schwidefsky | 992 | 58.53% | 8 | 19.51% |
Stefan Weinhuber | 304 | 17.94% | 5 | 12.20% |
Alexey Dobriyan | 130 | 7.67% | 2 | 4.88% |
Sebastian Ott | 66 | 3.89% | 2 | 4.88% |
Horst Hummel | 65 | 3.83% | 5 | 12.20% |
Stefan Haberland | 42 | 2.48% | 2 | 4.88% |
Andrew Morton | 29 | 1.71% | 2 | 4.88% |
Heiko Carstens | 21 | 1.24% | 4 | 9.76% |
Tejun Heo | 15 | 0.88% | 2 | 4.88% |
Denis V. Lunev | 9 | 0.53% | 1 | 2.44% |
André Goddard Rosa | 9 | 0.53% | 1 | 2.44% |
Kay Sievers | 4 | 0.24% | 1 | 2.44% |
Michael Holzheu | 3 | 0.18% | 1 | 2.44% |
Joe Perches | 2 | 0.12% | 1 | 2.44% |
Arjan van de Ven | 1 | 0.06% | 1 | 2.44% |
Jan Engelhardt | 1 | 0.06% | 1 | 2.44% |
Linus Torvalds | 1 | 0.06% | 1 | 2.44% |
Uwe Kleine-König | 1 | 0.06% | 1 | 2.44% |
Total | 1695 | 100.00% | 41 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.