7a555613eb
Introduce print_hex_dump_debug() that can be dynamically controlled, similar to pr_debug. Also, make print_hex_dump_bytes() dynamically controlled Implement only 'p' flag (_DPRINTK_FLAGS_PRINT) to keep it simple since hex dump prints multiple lines and long prefix would impact readability. To provide line/file etc. information, use pr_debug or similar before/after print_hex_dump_debug() Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
#ifndef _DYNAMIC_DEBUG_H
|
|
#define _DYNAMIC_DEBUG_H
|
|
|
|
/*
|
|
* An instance of this structure is created in a special
|
|
* ELF section at every dynamic debug callsite. At runtime,
|
|
* the special section is treated as an array of these.
|
|
*/
|
|
struct _ddebug {
|
|
/*
|
|
* These fields are used to drive the user interface
|
|
* for selecting and displaying debug callsites.
|
|
*/
|
|
const char *modname;
|
|
const char *function;
|
|
const char *filename;
|
|
const char *format;
|
|
unsigned int lineno:18;
|
|
/*
|
|
* The flags field controls the behaviour at the callsite.
|
|
* The bits here are changed dynamically when the user
|
|
* writes commands to <debugfs>/dynamic_debug/control
|
|
*/
|
|
#define _DPRINTK_FLAGS_NONE 0
|
|
#define _DPRINTK_FLAGS_PRINT (1<<0) /* printk() a message using the format */
|
|
#define _DPRINTK_FLAGS_INCL_MODNAME (1<<1)
|
|
#define _DPRINTK_FLAGS_INCL_FUNCNAME (1<<2)
|
|
#define _DPRINTK_FLAGS_INCL_LINENO (1<<3)
|
|
#define _DPRINTK_FLAGS_INCL_TID (1<<4)
|
|
#if defined DEBUG
|
|
#define _DPRINTK_FLAGS_DEFAULT _DPRINTK_FLAGS_PRINT
|
|
#else
|
|
#define _DPRINTK_FLAGS_DEFAULT 0
|
|
#endif
|
|
unsigned int flags:8;
|
|
} __attribute__((aligned(8)));
|
|
|
|
|
|
int ddebug_add_module(struct _ddebug *tab, unsigned int n,
|
|
const char *modname);
|
|
|
|
#if defined(CONFIG_DYNAMIC_DEBUG)
|
|
extern int ddebug_remove_module(const char *mod_name);
|
|
extern __printf(2, 3)
|
|
int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...);
|
|
|
|
extern int ddebug_dyndbg_module_param_cb(char *param, char *val,
|
|
const char *modname);
|
|
|
|
struct device;
|
|
|
|
extern __printf(3, 4)
|
|
int __dynamic_dev_dbg(struct _ddebug *descriptor, const struct device *dev,
|
|
const char *fmt, ...);
|
|
|
|
struct net_device;
|
|
|
|
extern __printf(3, 4)
|
|
int __dynamic_netdev_dbg(struct _ddebug *descriptor,
|
|
const struct net_device *dev,
|
|
const char *fmt, ...);
|
|
|
|
#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \
|
|
static struct _ddebug __aligned(8) \
|
|
__attribute__((section("__verbose"))) name = { \
|
|
.modname = KBUILD_MODNAME, \
|
|
.function = __func__, \
|
|
.filename = __FILE__, \
|
|
.format = (fmt), \
|
|
.lineno = __LINE__, \
|
|
.flags = _DPRINTK_FLAGS_DEFAULT, \
|
|
}
|
|
|
|
#define dynamic_pr_debug(fmt, ...) \
|
|
do { \
|
|
DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
|
|
if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
|
|
__dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
|
|
##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#define dynamic_dev_dbg(dev, fmt, ...) \
|
|
do { \
|
|
DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
|
|
if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
|
|
__dynamic_dev_dbg(&descriptor, dev, fmt, \
|
|
##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#define dynamic_netdev_dbg(dev, fmt, ...) \
|
|
do { \
|
|
DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
|
|
if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
|
|
__dynamic_netdev_dbg(&descriptor, dev, fmt, \
|
|
##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#define dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
|
|
groupsize, buf, len, ascii) \
|
|
do { \
|
|
DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, \
|
|
__builtin_constant_p(prefix_str) ? prefix_str : "hexdump");\
|
|
if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
|
|
print_hex_dump(KERN_DEBUG, prefix_str, \
|
|
prefix_type, rowsize, groupsize, \
|
|
buf, len, ascii); \
|
|
} while (0)
|
|
|
|
#else
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/errno.h>
|
|
|
|
static inline int ddebug_remove_module(const char *mod)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ddebug_dyndbg_module_param_cb(char *param, char *val,
|
|
const char *modname)
|
|
{
|
|
if (strstr(param, "dyndbg")) {
|
|
/* avoid pr_warn(), which wants pr_fmt() fully defined */
|
|
printk(KERN_WARNING "dyndbg param is supported only in "
|
|
"CONFIG_DYNAMIC_DEBUG builds\n");
|
|
return 0; /* allow and ignore */
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
#define dynamic_pr_debug(fmt, ...) \
|
|
do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0)
|
|
#define dynamic_dev_dbg(dev, fmt, ...) \
|
|
do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0)
|
|
#endif
|
|
|
|
#endif
|