2005-04-16 22:20:36 +00:00
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/*
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* File...........: linux/drivers/s390/block/dasd_proc.c
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* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
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* Horst Hummel <Horst.Hummel@de.ibm.com>
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* Carsten Otte <Cotte@de.ibm.com>
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Bugreports.to..: <Linux390@de.ibm.com>
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* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2002
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*
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* /proc interface for the dasd driver.
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*
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*/
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2009-03-26 14:23:49 +00:00
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#define KMSG_COMPONENT "dasd"
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2005-04-16 22:20:36 +00:00
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#include <linux/ctype.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2009-12-15 02:01:06 +00:00
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#include <linux/string.h>
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2005-04-16 22:20:36 +00:00
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#include <linux/seq_file.h>
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#include <linux/vmalloc.h>
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2005-06-25 21:55:33 +00:00
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#include <linux/proc_fs.h>
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2005-04-16 22:20:36 +00:00
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#include <asm/debug.h>
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#include <asm/uaccess.h>
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/* This is ugly... */
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#define PRINTK_HEADER "dasd_proc:"
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#include "dasd_int.h"
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static struct proc_dir_entry *dasd_proc_root_entry = NULL;
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static struct proc_dir_entry *dasd_devices_entry = NULL;
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static struct proc_dir_entry *dasd_statistics_entry = NULL;
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2007-07-10 09:24:17 +00:00
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#ifdef CONFIG_DASD_PROFILE
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2007-02-05 20:18:53 +00:00
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static char *
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2005-04-16 22:20:36 +00:00
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dasd_get_user_string(const char __user *user_buf, size_t user_len)
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{
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char *buffer;
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buffer = kmalloc(user_len + 1, GFP_KERNEL);
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if (buffer == NULL)
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return ERR_PTR(-ENOMEM);
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if (copy_from_user(buffer, user_buf, user_len) != 0) {
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kfree(buffer);
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return ERR_PTR(-EFAULT);
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}
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/* got the string, now strip linefeed. */
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if (buffer[user_len - 1] == '\n')
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buffer[user_len - 1] = 0;
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else
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buffer[user_len] = 0;
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return buffer;
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}
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2007-07-10 09:24:17 +00:00
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#endif /* CONFIG_DASD_PROFILE */
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2005-04-16 22:20:36 +00:00
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static int
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dasd_devices_show(struct seq_file *m, void *v)
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{
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struct dasd_device *device;
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2008-01-26 13:11:23 +00:00
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struct dasd_block *block;
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2005-04-16 22:20:36 +00:00
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char *substr;
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device = dasd_device_from_devindex((unsigned long) v - 1);
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if (IS_ERR(device))
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return 0;
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2008-01-26 13:11:23 +00:00
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if (device->block)
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block = device->block;
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2008-03-05 11:37:11 +00:00
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else {
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dasd_put_device(device);
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2008-01-26 13:11:23 +00:00
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return 0;
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2008-03-05 11:37:11 +00:00
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}
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2005-04-16 22:20:36 +00:00
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/* Print device number. */
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2008-10-10 19:33:09 +00:00
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seq_printf(m, "%s", dev_name(&device->cdev->dev));
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2005-04-16 22:20:36 +00:00
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/* Print discipline string. */
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2010-01-27 09:12:35 +00:00
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if (device->discipline != NULL)
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2005-04-16 22:20:36 +00:00
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seq_printf(m, "(%s)", device->discipline->name);
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else
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seq_printf(m, "(none)");
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/* Print kdev. */
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2008-01-26 13:11:23 +00:00
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if (block->gdp)
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2005-04-16 22:20:36 +00:00
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seq_printf(m, " at (%3d:%6d)",
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2008-09-03 07:01:48 +00:00
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MAJOR(disk_devt(block->gdp)),
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MINOR(disk_devt(block->gdp)));
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2005-04-16 22:20:36 +00:00
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else
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seq_printf(m, " at (???:??????)");
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/* Print device name. */
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2008-01-26 13:11:23 +00:00
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if (block->gdp)
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seq_printf(m, " is %-8s", block->gdp->disk_name);
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2005-04-16 22:20:36 +00:00
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else
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seq_printf(m, " is ????????");
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/* Print devices features. */
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2005-09-03 22:57:58 +00:00
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substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " ";
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2005-04-16 22:20:36 +00:00
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seq_printf(m, "%4s: ", substr);
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/* Print device status information. */
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2010-01-27 09:12:35 +00:00
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switch (device->state) {
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2005-04-16 22:20:36 +00:00
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case DASD_STATE_NEW:
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seq_printf(m, "new");
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break;
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case DASD_STATE_KNOWN:
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seq_printf(m, "detected");
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break;
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case DASD_STATE_BASIC:
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seq_printf(m, "basic");
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break;
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2006-03-08 05:55:39 +00:00
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case DASD_STATE_UNFMT:
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2006-03-10 01:33:52 +00:00
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seq_printf(m, "unformatted");
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2006-03-08 05:55:39 +00:00
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break;
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2005-04-16 22:20:36 +00:00
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case DASD_STATE_READY:
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case DASD_STATE_ONLINE:
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seq_printf(m, "active ");
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2008-01-26 13:11:23 +00:00
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if (dasd_check_blocksize(block->bp_block))
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2005-04-16 22:20:36 +00:00
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seq_printf(m, "n/f ");
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else
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seq_printf(m,
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2009-03-26 14:23:47 +00:00
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"at blocksize: %d, %lld blocks, %lld MB",
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2008-01-26 13:11:23 +00:00
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block->bp_block, block->blocks,
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((block->bp_block >> 9) *
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block->blocks) >> 11);
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2005-04-16 22:20:36 +00:00
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break;
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default:
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seq_printf(m, "no stat");
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break;
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}
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dasd_put_device(device);
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if (dasd_probeonly)
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seq_printf(m, "(probeonly)");
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seq_printf(m, "\n");
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return 0;
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}
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static void *dasd_devices_start(struct seq_file *m, loff_t *pos)
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{
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if (*pos >= dasd_max_devindex)
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return NULL;
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return (void *)((unsigned long) *pos + 1);
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}
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static void *dasd_devices_next(struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return dasd_devices_start(m, pos);
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}
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static void dasd_devices_stop(struct seq_file *m, void *v)
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{
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}
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2008-01-26 13:11:29 +00:00
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static const struct seq_operations dasd_devices_seq_ops = {
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2005-04-16 22:20:36 +00:00
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.start = dasd_devices_start,
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.next = dasd_devices_next,
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.stop = dasd_devices_stop,
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.show = dasd_devices_show,
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};
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static int dasd_devices_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &dasd_devices_seq_ops);
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}
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2007-02-12 08:55:34 +00:00
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static const struct file_operations dasd_devices_file_ops = {
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2008-04-29 08:02:20 +00:00
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.owner = THIS_MODULE,
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2005-04-16 22:20:36 +00:00
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.open = dasd_devices_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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2007-07-10 09:24:17 +00:00
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#ifdef CONFIG_DASD_PROFILE
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2010-02-26 21:37:50 +00:00
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static void dasd_statistics_array(struct seq_file *m, unsigned int *array, int factor)
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2005-04-16 22:20:36 +00:00
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{
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int i;
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for (i = 0; i < 32; i++) {
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2010-02-26 21:37:50 +00:00
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seq_printf(m, "%7d ", array[i] / factor);
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2005-04-16 22:20:36 +00:00
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if (i == 15)
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2010-02-26 21:37:50 +00:00
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seq_putc(m, '\n');
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2005-04-16 22:20:36 +00:00
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}
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2010-02-26 21:37:50 +00:00
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seq_putc(m, '\n');
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2005-04-16 22:20:36 +00:00
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}
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2007-07-10 09:24:17 +00:00
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#endif /* CONFIG_DASD_PROFILE */
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2005-04-16 22:20:36 +00:00
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2010-02-26 21:37:50 +00:00
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static int dasd_stats_proc_show(struct seq_file *m, void *v)
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2005-04-16 22:20:36 +00:00
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{
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#ifdef CONFIG_DASD_PROFILE
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struct dasd_profile_info_t *prof;
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2008-12-25 12:38:51 +00:00
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int factor;
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2005-04-16 22:20:36 +00:00
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/* check for active profiling */
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if (dasd_profile_level == DASD_PROFILE_OFF) {
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2010-02-26 21:37:50 +00:00
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seq_printf(m, "Statistics are off - they might be "
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2005-04-16 22:20:36 +00:00
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"switched on using 'echo set on > "
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"/proc/dasd/statistics'\n");
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2010-02-26 21:37:50 +00:00
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return 0;
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2005-04-16 22:20:36 +00:00
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}
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prof = &dasd_global_profile;
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2009-10-28 19:11:04 +00:00
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/* prevent counter 'overflow' on output */
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2008-12-25 12:38:51 +00:00
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for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
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factor *= 10);
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2005-04-16 22:20:36 +00:00
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2010-02-26 21:37:50 +00:00
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seq_printf(m, "%d dasd I/O requests\n", prof->dasd_io_reqs);
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seq_printf(m, "with %u sectors(512B each)\n",
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2005-04-16 22:20:36 +00:00
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prof->dasd_io_sects);
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2010-02-26 21:37:50 +00:00
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seq_printf(m, "Scale Factor is %d\n", factor);
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seq_printf(m,
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2005-04-16 22:20:36 +00:00
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" __<4 ___8 __16 __32 __64 _128 "
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" _256 _512 __1k __2k __4k __8k "
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" _16k _32k _64k 128k\n");
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2010-02-26 21:37:50 +00:00
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seq_printf(m,
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2005-04-16 22:20:36 +00:00
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" _256 _512 __1M __2M __4M __8M "
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" _16M _32M _64M 128M 256M 512M "
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" __1G __2G __4G " " _>4G\n");
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2010-02-26 21:37:50 +00:00
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seq_printf(m, "Histogram of sizes (512B secs)\n");
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dasd_statistics_array(m, prof->dasd_io_secs, factor);
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seq_printf(m, "Histogram of I/O times (microseconds)\n");
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dasd_statistics_array(m, prof->dasd_io_times, factor);
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seq_printf(m, "Histogram of I/O times per sector\n");
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dasd_statistics_array(m, prof->dasd_io_timps, factor);
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seq_printf(m, "Histogram of I/O time till ssch\n");
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dasd_statistics_array(m, prof->dasd_io_time1, factor);
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seq_printf(m, "Histogram of I/O time between ssch and irq\n");
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dasd_statistics_array(m, prof->dasd_io_time2, factor);
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seq_printf(m, "Histogram of I/O time between ssch "
|
2005-04-16 22:20:36 +00:00
|
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|
"and irq per sector\n");
|
2010-02-26 21:37:50 +00:00
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dasd_statistics_array(m, prof->dasd_io_time2ps, factor);
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seq_printf(m, "Histogram of I/O time between irq and end\n");
|
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|
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dasd_statistics_array(m, prof->dasd_io_time3, factor);
|
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seq_printf(m, "# of req in chanq at enqueuing (1..32) \n");
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dasd_statistics_array(m, prof->dasd_io_nr_req, factor);
|
2005-04-16 22:20:36 +00:00
|
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#else
|
2010-02-26 21:37:50 +00:00
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|
seq_printf(m, "Statistics are not activated in this kernel\n");
|
2005-04-16 22:20:36 +00:00
|
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|
#endif
|
2010-02-26 21:37:50 +00:00
|
|
|
return 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
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|
2010-02-26 21:37:50 +00:00
|
|
|
static int dasd_stats_proc_open(struct inode *inode, struct file *file)
|
|
|
|
{
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|
|
return single_open(file, dasd_stats_proc_show, NULL);
|
|
|
|
}
|
|
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|
static ssize_t dasd_stats_proc_write(struct file *file,
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|
|
const char __user *user_buf, size_t user_len, loff_t *pos)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
#ifdef CONFIG_DASD_PROFILE
|
|
|
|
char *buffer, *str;
|
|
|
|
|
|
|
|
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 */
|
2009-12-15 02:01:06 +00:00
|
|
|
str = skip_spaces(buffer);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (strncmp(str, "set", 3) == 0 && isspace(str[3])) {
|
|
|
|
/* 'set xxx' was given */
|
2009-12-15 02:01:06 +00:00
|
|
|
str = skip_spaces(str + 4);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (strcmp(str, "on") == 0) {
|
|
|
|
/* switch on statistics profiling */
|
|
|
|
dasd_profile_level = DASD_PROFILE_ON;
|
2009-03-26 14:23:49 +00:00
|
|
|
pr_info("The statistics feature has been switched "
|
|
|
|
"on\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
} else if (strcmp(str, "off") == 0) {
|
|
|
|
/* switch off and reset statistics profiling */
|
|
|
|
memset(&dasd_global_profile,
|
|
|
|
0, sizeof (struct dasd_profile_info_t));
|
|
|
|
dasd_profile_level = DASD_PROFILE_OFF;
|
2009-03-26 14:23:49 +00:00
|
|
|
pr_info("The statistics feature has been switched "
|
|
|
|
"off\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
} else
|
|
|
|
goto out_error;
|
|
|
|
} else if (strncmp(str, "reset", 5) == 0) {
|
|
|
|
/* reset the statistics */
|
|
|
|
memset(&dasd_global_profile, 0,
|
|
|
|
sizeof (struct dasd_profile_info_t));
|
2009-03-26 14:23:49 +00:00
|
|
|
pr_info("The statistics have been reset\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
} else
|
|
|
|
goto out_error;
|
|
|
|
kfree(buffer);
|
|
|
|
return user_len;
|
|
|
|
out_error:
|
2009-03-26 14:23:49 +00:00
|
|
|
pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
|
|
|
|
str);
|
2005-04-16 22:20:36 +00:00
|
|
|
kfree(buffer);
|
|
|
|
return -EINVAL;
|
|
|
|
#else
|
2009-03-26 14:23:49 +00:00
|
|
|
pr_warning("/proc/dasd/statistics: is not activated in this kernel\n");
|
2005-04-16 22:20:36 +00:00
|
|
|
return user_len;
|
|
|
|
#endif /* CONFIG_DASD_PROFILE */
|
|
|
|
}
|
|
|
|
|
2010-02-26 21:37:50 +00:00
|
|
|
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,
|
|
|
|
};
|
|
|
|
|
2006-04-11 05:53:48 +00:00
|
|
|
/*
|
|
|
|
* Create dasd proc-fs entries.
|
|
|
|
* In case creation failed, cleanup and return -ENOENT.
|
|
|
|
*/
|
2005-04-16 22:20:36 +00:00
|
|
|
int
|
|
|
|
dasd_proc_init(void)
|
|
|
|
{
|
2008-04-29 08:01:44 +00:00
|
|
|
dasd_proc_root_entry = proc_mkdir("dasd", NULL);
|
2006-04-11 05:53:48 +00:00
|
|
|
if (!dasd_proc_root_entry)
|
|
|
|
goto out_nodasd;
|
2008-04-29 08:02:20 +00:00
|
|
|
dasd_devices_entry = proc_create("devices",
|
|
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
|
|
dasd_proc_root_entry,
|
|
|
|
&dasd_devices_file_ops);
|
2006-04-11 05:53:48 +00:00
|
|
|
if (!dasd_devices_entry)
|
|
|
|
goto out_nodevices;
|
2010-02-26 21:37:50 +00:00
|
|
|
dasd_statistics_entry = proc_create("statistics",
|
|
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
|
|
dasd_proc_root_entry,
|
|
|
|
&dasd_stats_proc_fops);
|
2006-04-11 05:53:48 +00:00
|
|
|
if (!dasd_statistics_entry)
|
|
|
|
goto out_nostatistics;
|
2005-04-16 22:20:36 +00:00
|
|
|
return 0;
|
2006-04-11 05:53:48 +00:00
|
|
|
|
|
|
|
out_nostatistics:
|
|
|
|
remove_proc_entry("devices", dasd_proc_root_entry);
|
|
|
|
out_nodevices:
|
2008-04-29 08:01:44 +00:00
|
|
|
remove_proc_entry("dasd", NULL);
|
2006-04-11 05:53:48 +00:00
|
|
|
out_nodasd:
|
|
|
|
return -ENOENT;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
dasd_proc_exit(void)
|
|
|
|
{
|
|
|
|
remove_proc_entry("devices", dasd_proc_root_entry);
|
|
|
|
remove_proc_entry("statistics", dasd_proc_root_entry);
|
2008-04-29 08:01:44 +00:00
|
|
|
remove_proc_entry("dasd", NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|