linux/drivers/acpi/debug.c
Tejun Heo 5a0e3ad6af 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>
2010-03-30 22:02:32 +09:00

407 lines
11 KiB
C

/*
* debug.c - ACPI debug interface to userspace.
*/
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <acpi/acpi_drivers.h>
#define _COMPONENT ACPI_SYSTEM_COMPONENT
ACPI_MODULE_NAME("debug");
struct acpi_dlayer {
const char *name;
unsigned long value;
};
struct acpi_dlevel {
const char *name;
unsigned long value;
};
#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
static const struct acpi_dlayer acpi_debug_layers[] = {
ACPI_DEBUG_INIT(ACPI_UTILITIES),
ACPI_DEBUG_INIT(ACPI_HARDWARE),
ACPI_DEBUG_INIT(ACPI_EVENTS),
ACPI_DEBUG_INIT(ACPI_TABLES),
ACPI_DEBUG_INIT(ACPI_NAMESPACE),
ACPI_DEBUG_INIT(ACPI_PARSER),
ACPI_DEBUG_INIT(ACPI_DISPATCHER),
ACPI_DEBUG_INIT(ACPI_EXECUTER),
ACPI_DEBUG_INIT(ACPI_RESOURCES),
ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
ACPI_DEBUG_INIT(ACPI_COMPILER),
ACPI_DEBUG_INIT(ACPI_TOOLS),
ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
};
static const struct acpi_dlevel acpi_debug_levels[] = {
ACPI_DEBUG_INIT(ACPI_LV_INIT),
ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
ACPI_DEBUG_INIT(ACPI_LV_INFO),
ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
ACPI_DEBUG_INIT(ACPI_LV_PARSE),
ACPI_DEBUG_INIT(ACPI_LV_LOAD),
ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
ACPI_DEBUG_INIT(ACPI_LV_EXEC),
ACPI_DEBUG_INIT(ACPI_LV_NAMES),
ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
ACPI_DEBUG_INIT(ACPI_LV_TABLES),
ACPI_DEBUG_INIT(ACPI_LV_VALUES),
ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
ACPI_DEBUG_INIT(ACPI_LV_THREADS),
ACPI_DEBUG_INIT(ACPI_LV_IO),
ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
};
/* --------------------------------------------------------------------------
FS Interface (/sys)
-------------------------------------------------------------------------- */
static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
int result = 0;
int i;
result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
acpi_debug_layers[i].name,
acpi_debug_layers[i].value,
(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
}
result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
ACPI_ALL_DRIVERS,
(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
return result;
}
static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
int result = 0;
int i;
result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
acpi_debug_levels[i].name,
acpi_debug_levels[i].value,
(acpi_dbg_level & acpi_debug_levels[i].
value) ? '*' : ' ');
}
result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
acpi_dbg_level);
return result;
}
module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
static char trace_method_name[6];
module_param_string(trace_method_name, trace_method_name, 6, 0644);
static unsigned int trace_debug_layer;
module_param(trace_debug_layer, uint, 0644);
static unsigned int trace_debug_level;
module_param(trace_debug_level, uint, 0644);
static int param_set_trace_state(const char *val, struct kernel_param *kp)
{
int result = 0;
if (!strncmp(val, "enable", strlen("enable") - 1)) {
result = acpi_debug_trace(trace_method_name, trace_debug_level,
trace_debug_layer, 0);
if (result)
result = -EBUSY;
goto exit;
}
if (!strncmp(val, "disable", strlen("disable") - 1)) {
int name = 0;
result = acpi_debug_trace((char *)&name, trace_debug_level,
trace_debug_layer, 0);
if (result)
result = -EBUSY;
goto exit;
}
if (!strncmp(val, "1", 1)) {
result = acpi_debug_trace(trace_method_name, trace_debug_level,
trace_debug_layer, 1);
if (result)
result = -EBUSY;
goto exit;
}
result = -EINVAL;
exit:
return result;
}
static int param_get_trace_state(char *buffer, struct kernel_param *kp)
{
if (!acpi_gbl_trace_method_name)
return sprintf(buffer, "disable");
else {
if (acpi_gbl_trace_flags & 1)
return sprintf(buffer, "1");
else
return sprintf(buffer, "enable");
}
return 0;
}
module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
NULL, 0644);
/* --------------------------------------------------------------------------
DebugFS Interface
-------------------------------------------------------------------------- */
static ssize_t cm_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
static char *buf;
static int uncopied_bytes;
struct acpi_table_header table;
acpi_status status;
if (!(*ppos)) {
/* parse the table header to get the table length */
if (count <= sizeof(struct acpi_table_header))
return -EINVAL;
if (copy_from_user(&table, user_buf,
sizeof(struct acpi_table_header)))
return -EFAULT;
uncopied_bytes = table.length;
buf = kzalloc(uncopied_bytes, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
if (uncopied_bytes < count) {
kfree(buf);
return -EINVAL;
}
if (copy_from_user(buf + (*ppos), user_buf, count)) {
kfree(buf);
return -EFAULT;
}
uncopied_bytes -= count;
*ppos += count;
if (!uncopied_bytes) {
status = acpi_install_method(buf);
kfree(buf);
if (ACPI_FAILURE(status))
return -EINVAL;
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
}
return count;
}
static const struct file_operations cm_fops = {
.write = cm_write,
};
static int acpi_debugfs_init(void)
{
struct dentry *acpi_dir, *cm_dentry;
acpi_dir = debugfs_create_dir("acpi", NULL);
if (!acpi_dir)
goto err;
cm_dentry = debugfs_create_file("custom_method", S_IWUGO,
acpi_dir, NULL, &cm_fops);
if (!cm_dentry)
goto err;
return 0;
err:
if (acpi_dir)
debugfs_remove(acpi_dir);
return -EINVAL;
}
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
#ifdef CONFIG_ACPI_PROCFS
#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
static int acpi_system_debug_proc_show(struct seq_file *m, void *v)
{
unsigned int i;
seq_printf(m, "%-25s\tHex SET\n", "Description");
switch ((unsigned long)m->private) {
case 0:
for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
seq_printf(m, "%-25s\t0x%08lX [%c]\n",
acpi_debug_layers[i].name,
acpi_debug_layers[i].value,
(acpi_dbg_layer & acpi_debug_layers[i].
value) ? '*' : ' ');
}
seq_printf(m, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
ACPI_ALL_DRIVERS,
(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
ACPI_ALL_DRIVERS) ==
0 ? ' ' : '-');
seq_printf(m,
"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
acpi_dbg_layer);
break;
case 1:
for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
seq_printf(m, "%-25s\t0x%08lX [%c]\n",
acpi_debug_levels[i].name,
acpi_debug_levels[i].value,
(acpi_dbg_level & acpi_debug_levels[i].
value) ? '*' : ' ');
}
seq_printf(m, "--\ndebug_level = 0x%08X (* = enabled)\n",
acpi_dbg_level);
break;
}
return 0;
}
static int acpi_system_debug_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, acpi_system_debug_proc_show, PDE(inode)->data);
}
static ssize_t acpi_system_debug_proc_write(struct file *file,
const char __user * buffer,
size_t count, loff_t *pos)
{
char debug_string[12] = { '\0' };
if (count > sizeof(debug_string) - 1)
return -EINVAL;
if (copy_from_user(debug_string, buffer, count))
return -EFAULT;
debug_string[count] = '\0';
switch ((unsigned long)PDE(file->f_path.dentry->d_inode)->data) {
case 0:
acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
break;
case 1:
acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
break;
default:
return -EINVAL;
}
return count;
}
static const struct file_operations acpi_system_debug_proc_fops = {
.owner = THIS_MODULE,
.open = acpi_system_debug_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = acpi_system_debug_proc_write,
};
#endif
int __init acpi_procfs_init(void)
{
#ifdef CONFIG_ACPI_PROCFS
struct proc_dir_entry *entry;
int error = 0;
char *name;
/* 'debug_layer' [R/W] */
name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
acpi_root_dir, &acpi_system_debug_proc_fops,
(void *)0);
if (!entry)
goto Error;
/* 'debug_level' [R/W] */
name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
acpi_root_dir, &acpi_system_debug_proc_fops,
(void *)1);
if (!entry)
goto Error;
Done:
return error;
Error:
remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
error = -ENODEV;
goto Done;
#else
return 0;
#endif
}
int __init acpi_debug_init(void)
{
acpi_debugfs_init();
acpi_procfs_init();
return 0;
}