mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-18 03:23:53 -04:00
760fc597c3
Align constant definition names with parameters to make it easier to map. It's also better to maintain and extend the names while keeping their uniqueness. Link: https://lkml.kernel.org/r/20251030132007.3742368-3-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Feng Tang <feng.tang@linux.alibaba.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
#include <linux/sched/debug.h>
|
|
#include <linux/console.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ftrace.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/nmi.h>
|
|
|
|
#include <linux/sys_info.h>
|
|
|
|
struct sys_info_name {
|
|
unsigned long bit;
|
|
const char *name;
|
|
};
|
|
|
|
/*
|
|
* When 'si_names' gets updated, please make sure the 'sys_info_avail'
|
|
* below is updated accordingly.
|
|
*/
|
|
static const struct sys_info_name si_names[] = {
|
|
{ SYS_INFO_TASKS, "tasks" },
|
|
{ SYS_INFO_MEM, "mem" },
|
|
{ SYS_INFO_TIMERS, "timers" },
|
|
{ SYS_INFO_LOCKS, "locks" },
|
|
{ SYS_INFO_FTRACE, "ftrace" },
|
|
{ SYS_INFO_ALL_BT, "all_bt" },
|
|
{ SYS_INFO_BLOCKED_TASKS, "blocked_tasks" },
|
|
};
|
|
|
|
/* Expecting string like "xxx_sys_info=tasks,mem,timers,locks,ftrace,..." */
|
|
unsigned long sys_info_parse_param(char *str)
|
|
{
|
|
unsigned long si_bits = 0;
|
|
char *s, *name;
|
|
int i;
|
|
|
|
s = str;
|
|
while ((name = strsep(&s, ",")) && *name) {
|
|
for (i = 0; i < ARRAY_SIZE(si_names); i++) {
|
|
if (!strcmp(name, si_names[i].name)) {
|
|
si_bits |= si_names[i].bit;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return si_bits;
|
|
}
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
|
|
static const char sys_info_avail[] __maybe_unused = "tasks,mem,timers,locks,ftrace,all_bt,blocked_tasks";
|
|
|
|
int sysctl_sys_info_handler(const struct ctl_table *ro_table, int write,
|
|
void *buffer, size_t *lenp,
|
|
loff_t *ppos)
|
|
{
|
|
char names[sizeof(sys_info_avail)];
|
|
struct ctl_table table;
|
|
unsigned long *si_bits_global;
|
|
unsigned long si_bits;
|
|
|
|
si_bits_global = ro_table->data;
|
|
|
|
if (write) {
|
|
int ret;
|
|
|
|
table = *ro_table;
|
|
table.data = names;
|
|
table.maxlen = sizeof(names);
|
|
ret = proc_dostring(&table, write, buffer, lenp, ppos);
|
|
if (ret)
|
|
return ret;
|
|
|
|
si_bits = sys_info_parse_param(names);
|
|
/* The access to the global value is not synchronized. */
|
|
WRITE_ONCE(*si_bits_global, si_bits);
|
|
return 0;
|
|
} else {
|
|
/* for 'read' operation */
|
|
char *delim = "";
|
|
int i, len = 0;
|
|
|
|
/* The access to the global value is not synchronized. */
|
|
si_bits = READ_ONCE(*si_bits_global);
|
|
|
|
names[0] = '\0';
|
|
for (i = 0; i < ARRAY_SIZE(si_names); i++) {
|
|
if (si_bits & si_names[i].bit) {
|
|
len += scnprintf(names + len, sizeof(names) - len,
|
|
"%s%s", delim, si_names[i].name);
|
|
delim = ",";
|
|
}
|
|
}
|
|
|
|
table = *ro_table;
|
|
table.data = names;
|
|
table.maxlen = sizeof(names);
|
|
return proc_dostring(&table, write, buffer, lenp, ppos);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void sys_info(unsigned long si_mask)
|
|
{
|
|
if (si_mask & SYS_INFO_TASKS)
|
|
show_state();
|
|
|
|
if (si_mask & SYS_INFO_MEM)
|
|
show_mem();
|
|
|
|
if (si_mask & SYS_INFO_TIMERS)
|
|
sysrq_timer_list_show();
|
|
|
|
if (si_mask & SYS_INFO_LOCKS)
|
|
debug_show_all_locks();
|
|
|
|
if (si_mask & SYS_INFO_FTRACE)
|
|
ftrace_dump(DUMP_ALL);
|
|
|
|
if (si_mask & SYS_INFO_ALL_BT)
|
|
trigger_all_cpu_backtrace();
|
|
|
|
if (si_mask & SYS_INFO_BLOCKED_TASKS)
|
|
show_state_filter(TASK_UNINTERRUPTIBLE);
|
|
}
|