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-rw-r--r--arch/s390/appldata/appldata_base.c428
1 files changed, 428 insertions, 0 deletions
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
new file mode 100644
index 0000000000..3b09946256
--- /dev/null
+++ b/arch/s390/appldata/appldata_base.c
@@ -0,0 +1,428 @@
+// 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(struct ctl_table *ctl, int write,
+ void *buffer, size_t *lenp, loff_t *ppos);
+static int appldata_interval_handler(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(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(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(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;
+
+ /* The last entry must be an empty one */
+ ops->ctl_table = kcalloc(2, 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);