575 lines
14 KiB
C
575 lines
14 KiB
C
/*
|
|
* Base infrastructure for Linux-z/VM Monitor Stream, Stage 1.
|
|
* Exports appldata_register_ops() and appldata_unregister_ops() for the
|
|
* data gathering modules.
|
|
*
|
|
* Copyright IBM Corp. 2003, 2009
|
|
*
|
|
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
|
|
*/
|
|
|
|
#define KMSG_COMPONENT "appldata"
|
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/suspend.h>
|
|
#include <linux/platform_device.h>
|
|
#include <asm/appldata.h>
|
|
#include <asm/vtimer.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/io.h>
|
|
#include <asm/smp.h>
|
|
|
|
#include "appldata.h"
|
|
|
|
|
|
#define APPLDATA_CPU_INTERVAL 10000 /* default (CPU) time for
|
|
sampling interval in
|
|
milliseconds */
|
|
|
|
#define TOD_MICRO 0x01000 /* nr. of TOD clock units
|
|
for 1 microsecond */
|
|
|
|
static struct platform_device *appldata_pdev;
|
|
|
|
/*
|
|
* /proc entries (sysctl)
|
|
*/
|
|
static const char appldata_proc_name[APPLDATA_PROC_NAME_LENGTH] = "appldata";
|
|
static int appldata_timer_handler(struct ctl_table *ctl, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos);
|
|
static int appldata_interval_handler(struct ctl_table *ctl, int write,
|
|
void __user *buffer,
|
|
size_t *lenp, loff_t *ppos);
|
|
|
|
static struct ctl_table_header *appldata_sysctl_header;
|
|
static struct ctl_table appldata_table[] = {
|
|
{
|
|
.procname = "timer",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
.proc_handler = appldata_timer_handler,
|
|
},
|
|
{
|
|
.procname = "interval",
|
|
.mode = S_IRUGO | S_IWUSR,
|
|
.proc_handler = appldata_interval_handler,
|
|
},
|
|
{ },
|
|
};
|
|
|
|
static struct ctl_table appldata_dir_table[] = {
|
|
{
|
|
.procname = appldata_proc_name,
|
|
.maxlen = 0,
|
|
.mode = S_IRUGO | S_IXUGO,
|
|
.child = appldata_table,
|
|
},
|
|
{ },
|
|
};
|
|
|
|
/*
|
|
* Timer
|
|
*/
|
|
static struct vtimer_list appldata_timer;
|
|
|
|
static DEFINE_SPINLOCK(appldata_timer_lock);
|
|
static int appldata_interval = APPLDATA_CPU_INTERVAL;
|
|
static int appldata_timer_active;
|
|
static int appldata_timer_suspended = 0;
|
|
|
|
/*
|
|
* Work queue
|
|
*/
|
|
static struct workqueue_struct *appldata_wq;
|
|
static void appldata_work_fn(struct work_struct *work);
|
|
static DECLARE_WORK(appldata_work, appldata_work_fn);
|
|
|
|
|
|
/*
|
|
* Ops list
|
|
*/
|
|
static DEFINE_MUTEX(appldata_ops_mutex);
|
|
static LIST_HEAD(appldata_ops_list);
|
|
|
|
|
|
/*************************** timer, work, DIAG *******************************/
|
|
/*
|
|
* appldata_timer_function()
|
|
*
|
|
* schedule work and reschedule timer
|
|
*/
|
|
static void appldata_timer_function(unsigned long data)
|
|
{
|
|
queue_work(appldata_wq, (struct work_struct *) data);
|
|
}
|
|
|
|
/*
|
|
* appldata_work_fn()
|
|
*
|
|
* call data gathering function for each (active) module
|
|
*/
|
|
static void appldata_work_fn(struct work_struct *work)
|
|
{
|
|
struct list_head *lh;
|
|
struct appldata_ops *ops;
|
|
|
|
mutex_lock(&appldata_ops_mutex);
|
|
list_for_each(lh, &appldata_ops_list) {
|
|
ops = list_entry(lh, struct appldata_ops, list);
|
|
if (ops->active == 1) {
|
|
ops->callback(ops->data);
|
|
}
|
|
}
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
}
|
|
|
|
/*
|
|
* appldata_diag()
|
|
*
|
|
* prepare parameter list, issue DIAG 0xDC
|
|
*/
|
|
int appldata_diag(char record_nr, u16 function, unsigned long buffer,
|
|
u16 length, char *mod_lvl)
|
|
{
|
|
struct appldata_product_id id = {
|
|
.prod_nr = {0xD3, 0xC9, 0xD5, 0xE4,
|
|
0xE7, 0xD2, 0xD9}, /* "LINUXKR" */
|
|
.prod_fn = 0xD5D3, /* "NL" */
|
|
.version_nr = 0xF2F6, /* "26" */
|
|
.release_nr = 0xF0F1, /* "01" */
|
|
};
|
|
|
|
id.record_nr = record_nr;
|
|
id.mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1];
|
|
return appldata_asm(&id, function, (void *) buffer, length);
|
|
}
|
|
/************************ timer, work, DIAG <END> ****************************/
|
|
|
|
|
|
/****************************** /proc stuff **********************************/
|
|
|
|
#define APPLDATA_ADD_TIMER 0
|
|
#define APPLDATA_DEL_TIMER 1
|
|
#define APPLDATA_MOD_TIMER 2
|
|
|
|
/*
|
|
* __appldata_vtimer_setup()
|
|
*
|
|
* Add, delete or modify virtual timers on all online cpus.
|
|
* The caller needs to get the appldata_timer_lock spinlock.
|
|
*/
|
|
static void __appldata_vtimer_setup(int cmd)
|
|
{
|
|
u64 timer_interval = (u64) appldata_interval * 1000 * TOD_MICRO;
|
|
|
|
switch (cmd) {
|
|
case APPLDATA_ADD_TIMER:
|
|
if (appldata_timer_active)
|
|
break;
|
|
appldata_timer.expires = timer_interval;
|
|
add_virt_timer_periodic(&appldata_timer);
|
|
appldata_timer_active = 1;
|
|
break;
|
|
case APPLDATA_DEL_TIMER:
|
|
del_virt_timer(&appldata_timer);
|
|
if (!appldata_timer_active)
|
|
break;
|
|
appldata_timer_active = 0;
|
|
break;
|
|
case APPLDATA_MOD_TIMER:
|
|
if (!appldata_timer_active)
|
|
break;
|
|
mod_virt_timer_periodic(&appldata_timer, timer_interval);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* appldata_timer_handler()
|
|
*
|
|
* Start/Stop timer, show status of timer (0 = not active, 1 = active)
|
|
*/
|
|
static int
|
|
appldata_timer_handler(struct ctl_table *ctl, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
unsigned int len;
|
|
char buf[2];
|
|
|
|
if (!*lenp || *ppos) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
if (!write) {
|
|
strncpy(buf, appldata_timer_active ? "1\n" : "0\n",
|
|
ARRAY_SIZE(buf));
|
|
len = strnlen(buf, ARRAY_SIZE(buf));
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
if (copy_to_user(buffer, buf, len))
|
|
return -EFAULT;
|
|
goto out;
|
|
}
|
|
len = *lenp;
|
|
if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
|
|
return -EFAULT;
|
|
spin_lock(&appldata_timer_lock);
|
|
if (buf[0] == '1')
|
|
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
|
|
else if (buf[0] == '0')
|
|
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
|
|
spin_unlock(&appldata_timer_lock);
|
|
out:
|
|
*lenp = len;
|
|
*ppos += len;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* appldata_interval_handler()
|
|
*
|
|
* Set (CPU) timer interval for collection of data (in milliseconds), show
|
|
* current timer interval.
|
|
*/
|
|
static int
|
|
appldata_interval_handler(struct ctl_table *ctl, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
unsigned int len;
|
|
int interval;
|
|
char buf[16];
|
|
|
|
if (!*lenp || *ppos) {
|
|
*lenp = 0;
|
|
return 0;
|
|
}
|
|
if (!write) {
|
|
len = sprintf(buf, "%i\n", appldata_interval);
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
if (copy_to_user(buffer, buf, len))
|
|
return -EFAULT;
|
|
goto out;
|
|
}
|
|
len = *lenp;
|
|
if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
|
|
return -EFAULT;
|
|
interval = 0;
|
|
sscanf(buf, "%i", &interval);
|
|
if (interval <= 0)
|
|
return -EINVAL;
|
|
|
|
spin_lock(&appldata_timer_lock);
|
|
appldata_interval = interval;
|
|
__appldata_vtimer_setup(APPLDATA_MOD_TIMER);
|
|
spin_unlock(&appldata_timer_lock);
|
|
out:
|
|
*lenp = len;
|
|
*ppos += len;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* appldata_generic_handler()
|
|
*
|
|
* Generic start/stop monitoring and DIAG, show status of
|
|
* monitoring (0 = not in process, 1 = in process)
|
|
*/
|
|
static int
|
|
appldata_generic_handler(struct ctl_table *ctl, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct appldata_ops *ops = NULL, *tmp_ops;
|
|
unsigned int len;
|
|
int rc, found;
|
|
char buf[2];
|
|
struct list_head *lh;
|
|
|
|
found = 0;
|
|
mutex_lock(&appldata_ops_mutex);
|
|
list_for_each(lh, &appldata_ops_list) {
|
|
tmp_ops = list_entry(lh, struct appldata_ops, list);
|
|
if (&tmp_ops->ctl_table[2] == ctl) {
|
|
found = 1;
|
|
}
|
|
}
|
|
if (!found) {
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
return -ENODEV;
|
|
}
|
|
ops = ctl->data;
|
|
if (!try_module_get(ops->owner)) { // protect this function
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
return -ENODEV;
|
|
}
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
|
|
if (!*lenp || *ppos) {
|
|
*lenp = 0;
|
|
module_put(ops->owner);
|
|
return 0;
|
|
}
|
|
if (!write) {
|
|
strncpy(buf, ops->active ? "1\n" : "0\n", ARRAY_SIZE(buf));
|
|
len = strnlen(buf, ARRAY_SIZE(buf));
|
|
if (len > *lenp)
|
|
len = *lenp;
|
|
if (copy_to_user(buffer, buf, len)) {
|
|
module_put(ops->owner);
|
|
return -EFAULT;
|
|
}
|
|
goto out;
|
|
}
|
|
len = *lenp;
|
|
if (copy_from_user(buf, buffer,
|
|
len > sizeof(buf) ? sizeof(buf) : len)) {
|
|
module_put(ops->owner);
|
|
return -EFAULT;
|
|
}
|
|
|
|
mutex_lock(&appldata_ops_mutex);
|
|
if ((buf[0] == '1') && (ops->active == 0)) {
|
|
// protect work queue callback
|
|
if (!try_module_get(ops->owner)) {
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
module_put(ops->owner);
|
|
return -ENODEV;
|
|
}
|
|
ops->callback(ops->data); // init record
|
|
rc = appldata_diag(ops->record_nr,
|
|
APPLDATA_START_INTERVAL_REC,
|
|
(unsigned long) ops->data, ops->size,
|
|
ops->mod_lvl);
|
|
if (rc != 0) {
|
|
pr_err("Starting the data collection for %s "
|
|
"failed with rc=%d\n", ops->name, rc);
|
|
module_put(ops->owner);
|
|
} else
|
|
ops->active = 1;
|
|
} else if ((buf[0] == '0') && (ops->active == 1)) {
|
|
ops->active = 0;
|
|
rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
|
|
(unsigned long) ops->data, ops->size,
|
|
ops->mod_lvl);
|
|
if (rc != 0)
|
|
pr_err("Stopping the data collection for %s "
|
|
"failed with rc=%d\n", ops->name, rc);
|
|
module_put(ops->owner);
|
|
}
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
out:
|
|
*lenp = len;
|
|
*ppos += len;
|
|
module_put(ops->owner);
|
|
return 0;
|
|
}
|
|
|
|
/*************************** /proc stuff <END> *******************************/
|
|
|
|
|
|
/************************* module-ops management *****************************/
|
|
/*
|
|
* appldata_register_ops()
|
|
*
|
|
* update ops list, register /proc/sys entries
|
|
*/
|
|
int appldata_register_ops(struct appldata_ops *ops)
|
|
{
|
|
if (ops->size > APPLDATA_MAX_REC_SIZE)
|
|
return -EINVAL;
|
|
|
|
ops->ctl_table = kzalloc(4 * sizeof(struct ctl_table), GFP_KERNEL);
|
|
if (!ops->ctl_table)
|
|
return -ENOMEM;
|
|
|
|
mutex_lock(&appldata_ops_mutex);
|
|
list_add(&ops->list, &appldata_ops_list);
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
|
|
ops->ctl_table[0].procname = appldata_proc_name;
|
|
ops->ctl_table[0].maxlen = 0;
|
|
ops->ctl_table[0].mode = S_IRUGO | S_IXUGO;
|
|
ops->ctl_table[0].child = &ops->ctl_table[2];
|
|
|
|
ops->ctl_table[2].procname = ops->name;
|
|
ops->ctl_table[2].mode = S_IRUGO | S_IWUSR;
|
|
ops->ctl_table[2].proc_handler = appldata_generic_handler;
|
|
ops->ctl_table[2].data = ops;
|
|
|
|
ops->sysctl_header = register_sysctl_table(ops->ctl_table);
|
|
if (!ops->sysctl_header)
|
|
goto out;
|
|
return 0;
|
|
out:
|
|
mutex_lock(&appldata_ops_mutex);
|
|
list_del(&ops->list);
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
kfree(ops->ctl_table);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* appldata_unregister_ops()
|
|
*
|
|
* update ops list, unregister /proc entries, stop DIAG if necessary
|
|
*/
|
|
void appldata_unregister_ops(struct appldata_ops *ops)
|
|
{
|
|
mutex_lock(&appldata_ops_mutex);
|
|
list_del(&ops->list);
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
unregister_sysctl_table(ops->sysctl_header);
|
|
kfree(ops->ctl_table);
|
|
}
|
|
/********************** module-ops management <END> **************************/
|
|
|
|
|
|
/**************************** suspend / resume *******************************/
|
|
static int appldata_freeze(struct device *dev)
|
|
{
|
|
struct appldata_ops *ops;
|
|
int rc;
|
|
struct list_head *lh;
|
|
|
|
spin_lock(&appldata_timer_lock);
|
|
if (appldata_timer_active) {
|
|
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
|
|
appldata_timer_suspended = 1;
|
|
}
|
|
spin_unlock(&appldata_timer_lock);
|
|
|
|
mutex_lock(&appldata_ops_mutex);
|
|
list_for_each(lh, &appldata_ops_list) {
|
|
ops = list_entry(lh, struct appldata_ops, list);
|
|
if (ops->active == 1) {
|
|
rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
|
|
(unsigned long) ops->data, ops->size,
|
|
ops->mod_lvl);
|
|
if (rc != 0)
|
|
pr_err("Stopping the data collection for %s "
|
|
"failed with rc=%d\n", ops->name, rc);
|
|
}
|
|
}
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int appldata_restore(struct device *dev)
|
|
{
|
|
struct appldata_ops *ops;
|
|
int rc;
|
|
struct list_head *lh;
|
|
|
|
spin_lock(&appldata_timer_lock);
|
|
if (appldata_timer_suspended) {
|
|
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
|
|
appldata_timer_suspended = 0;
|
|
}
|
|
spin_unlock(&appldata_timer_lock);
|
|
|
|
mutex_lock(&appldata_ops_mutex);
|
|
list_for_each(lh, &appldata_ops_list) {
|
|
ops = list_entry(lh, struct appldata_ops, list);
|
|
if (ops->active == 1) {
|
|
ops->callback(ops->data); // init record
|
|
rc = appldata_diag(ops->record_nr,
|
|
APPLDATA_START_INTERVAL_REC,
|
|
(unsigned long) ops->data, ops->size,
|
|
ops->mod_lvl);
|
|
if (rc != 0) {
|
|
pr_err("Starting the data collection for %s "
|
|
"failed with rc=%d\n", ops->name, rc);
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&appldata_ops_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int appldata_thaw(struct device *dev)
|
|
{
|
|
return appldata_restore(dev);
|
|
}
|
|
|
|
static const struct dev_pm_ops appldata_pm_ops = {
|
|
.freeze = appldata_freeze,
|
|
.thaw = appldata_thaw,
|
|
.restore = appldata_restore,
|
|
};
|
|
|
|
static struct platform_driver appldata_pdrv = {
|
|
.driver = {
|
|
.name = "appldata",
|
|
.pm = &appldata_pm_ops,
|
|
},
|
|
};
|
|
/************************* suspend / resume <END> ****************************/
|
|
|
|
|
|
/******************************* init / exit *********************************/
|
|
|
|
/*
|
|
* appldata_init()
|
|
*
|
|
* init timer, register /proc entries
|
|
*/
|
|
static int __init appldata_init(void)
|
|
{
|
|
int rc;
|
|
|
|
init_virt_timer(&appldata_timer);
|
|
appldata_timer.function = appldata_timer_function;
|
|
appldata_timer.data = (unsigned long) &appldata_work;
|
|
|
|
rc = platform_driver_register(&appldata_pdrv);
|
|
if (rc)
|
|
return rc;
|
|
|
|
appldata_pdev = platform_device_register_simple("appldata", -1, NULL,
|
|
0);
|
|
if (IS_ERR(appldata_pdev)) {
|
|
rc = PTR_ERR(appldata_pdev);
|
|
goto out_driver;
|
|
}
|
|
appldata_wq = alloc_ordered_workqueue("appldata", 0);
|
|
if (!appldata_wq) {
|
|
rc = -ENOMEM;
|
|
goto out_device;
|
|
}
|
|
|
|
appldata_sysctl_header = register_sysctl_table(appldata_dir_table);
|
|
return 0;
|
|
|
|
out_device:
|
|
platform_device_unregister(appldata_pdev);
|
|
out_driver:
|
|
platform_driver_unregister(&appldata_pdrv);
|
|
return rc;
|
|
}
|
|
|
|
__initcall(appldata_init);
|
|
|
|
/**************************** init / exit <END> ******************************/
|
|
|
|
EXPORT_SYMBOL_GPL(appldata_register_ops);
|
|
EXPORT_SYMBOL_GPL(appldata_unregister_ops);
|
|
EXPORT_SYMBOL_GPL(appldata_diag);
|
|
|
|
#ifdef CONFIG_SWAP
|
|
EXPORT_SYMBOL_GPL(si_swapinfo);
|
|
#endif
|
|
EXPORT_SYMBOL_GPL(nr_threads);
|
|
EXPORT_SYMBOL_GPL(nr_running);
|
|
EXPORT_SYMBOL_GPL(nr_iowait);
|