Contributors: 19
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Andrew Morton |
1013 |
60.88% |
3 |
7.32% |
| Martin Schwidefsky |
205 |
12.32% |
5 |
12.20% |
| Gerald Schaefer |
174 |
10.46% |
8 |
19.51% |
| Vasily Gorbik |
149 |
8.95% |
1 |
2.44% |
| Heiko Carstens |
40 |
2.40% |
7 |
17.07% |
| Linus Torvalds |
20 |
1.20% |
1 |
2.44% |
| Luis R. Rodriguez |
10 |
0.60% |
2 |
4.88% |
| Joel Granados |
9 |
0.54% |
3 |
7.32% |
| Thomas Gleixner |
7 |
0.42% |
1 |
2.44% |
| David Howells |
6 |
0.36% |
1 |
2.44% |
| Chen Gang S |
6 |
0.36% |
1 |
2.44% |
| Joe Perches |
5 |
0.30% |
1 |
2.44% |
| Matteo Croce |
5 |
0.30% |
1 |
2.44% |
| Al Viro |
4 |
0.24% |
1 |
2.44% |
| Bhaktipriya Shridhar |
3 |
0.18% |
1 |
2.44% |
| Ingo Molnar |
3 |
0.18% |
1 |
2.44% |
| Satyam Sharma |
2 |
0.12% |
1 |
2.44% |
| Kees Cook |
2 |
0.12% |
1 |
2.44% |
| Greg Kroah-Hartman |
1 |
0.06% |
1 |
2.44% |
| Total |
1664 |
|
41 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* 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/sched/stat.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/uaccess.h>
#include <linux/io.h>
#include <asm/appldata.h>
#include <asm/vtimer.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 */
/*
* /proc entries (sysctl)
*/
static const char appldata_proc_name[APPLDATA_PROC_NAME_LENGTH] = "appldata";
static int appldata_timer_handler(const struct ctl_table *ctl, int write,
void *buffer, size_t *lenp, loff_t *ppos);
static int appldata_interval_handler(const struct ctl_table *ctl, int write,
void *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,
},
};
/*
* 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;
/*
* 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);
}
static struct appldata_product_id appldata_id = {
.prod_nr = {0xD3, 0xC9, 0xD5, 0xE4,
0xE7, 0xD2, 0xD9}, /* "LINUXKR" */
.prod_fn = 0xD5D3, /* "NL" */
.version_nr = 0xF2F6, /* "26" */
.release_nr = 0xF0F1, /* "01" */
};
/*
* 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_parameter_list *parm_list;
struct appldata_product_id *id;
int rc;
parm_list = kmalloc(sizeof(*parm_list), GFP_KERNEL);
id = kmemdup(&appldata_id, sizeof(appldata_id), GFP_KERNEL);
rc = -ENOMEM;
if (parm_list && id) {
id->record_nr = record_nr;
id->mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1];
rc = appldata_asm(parm_list, id, function,
(void *) buffer, length);
}
kfree(id);
kfree(parm_list);
return rc;
}
/************************ 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(const struct ctl_table *ctl, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int timer_active = appldata_timer_active;
int rc;
struct ctl_table ctl_entry = {
.procname = ctl->procname,
.data = &timer_active,
.maxlen = sizeof(int),
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
};
rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write)
return rc;
spin_lock(&appldata_timer_lock);
if (timer_active)
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
else
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
spin_unlock(&appldata_timer_lock);
return 0;
}
/*
* appldata_interval_handler()
*
* Set (CPU) timer interval for collection of data (in milliseconds), show
* current timer interval.
*/
static int
appldata_interval_handler(const struct ctl_table *ctl, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
int interval = appldata_interval;
int rc;
struct ctl_table ctl_entry = {
.procname = ctl->procname,
.data = &interval,
.maxlen = sizeof(int),
.extra1 = SYSCTL_ONE,
};
rc = proc_dointvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write)
return rc;
spin_lock(&appldata_timer_lock);
appldata_interval = interval;
__appldata_vtimer_setup(APPLDATA_MOD_TIMER);
spin_unlock(&appldata_timer_lock);
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(const struct ctl_table *ctl, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
struct appldata_ops *ops = NULL, *tmp_ops;
struct list_head *lh;
int rc, found;
int active;
struct ctl_table ctl_entry = {
.data = &active,
.maxlen = sizeof(int),
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_ONE,
};
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[0] == 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);
active = ops->active;
rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write) {
module_put(ops->owner);
return rc;
}
mutex_lock(&appldata_ops_mutex);
if (active && (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 (!active && (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);
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 = kcalloc(1, 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 = ops->name;
ops->ctl_table[0].mode = S_IRUGO | S_IWUSR;
ops->ctl_table[0].proc_handler = appldata_generic_handler;
ops->ctl_table[0].data = ops;
ops->sysctl_header = register_sysctl_sz(appldata_proc_name, ops->ctl_table, 1);
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> **************************/
/******************************* init / exit *********************************/
/*
* appldata_init()
*
* init timer, register /proc entries
*/
static int __init appldata_init(void)
{
init_virt_timer(&appldata_timer);
appldata_timer.function = appldata_timer_function;
appldata_timer.data = (unsigned long) &appldata_work;
appldata_wq = alloc_ordered_workqueue("appldata", 0);
if (!appldata_wq)
return -ENOMEM;
appldata_sysctl_header = register_sysctl(appldata_proc_name, appldata_table);
return 0;
}
__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);