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/*
* S/390 debug facility
*
* Copyright IBM Corp. 1999, 2000
*/
#ifndef DEBUG_H
#define DEBUG_H
#include <linux/fs.h>
/* Note:
* struct __debug_entry must be defined outside of #ifdef __KERNEL__
* in order to allow a user program to analyze the 'raw'-view.
*/
struct __debug_entry{
union {
struct {
unsigned long long clock:52;
unsigned long long exception:1;
unsigned long long level:3;
unsigned long long cpuid:8;
} fields;
unsigned long long stck;
} id;
void* caller;
} __attribute__((packed));
#define __DEBUG_FEATURE_VERSION 2 /* version of debug feature */
#ifdef __KERNEL__
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/time.h>
#define DEBUG_MAX_LEVEL 6 /* debug levels range from 0 to 6 */
#define DEBUG_OFF_LEVEL -1 /* level where debug is switched off */
#define DEBUG_FLUSH_ALL -1 /* parameter to flush all areas */
#define DEBUG_MAX_VIEWS 10 /* max number of views in proc fs */
#define DEBUG_MAX_NAME_LEN 64 /* max length for a debugfs file name */
#define DEBUG_DEFAULT_LEVEL 3 /* initial debug level */
#define DEBUG_DIR_ROOT "s390dbf" /* name of debug root directory in proc fs */
#define DEBUG_DATA(entry) (char*)(entry + 1) /* data is stored behind */
/* the entry information */
typedef struct __debug_entry debug_entry_t;
struct debug_view;
typedef struct debug_info {
struct debug_info* next;
struct debug_info* prev;
atomic_t ref_count;
spinlock_t lock;
int level;
int nr_areas;
int pages_per_area;
int buf_size;
int entry_size;
debug_entry_t*** areas;
int active_area;
int *active_pages;
int *active_entries;
struct dentry* debugfs_root_entry;
struct dentry* debugfs_entries[DEBUG_MAX_VIEWS];
struct debug_view* views[DEBUG_MAX_VIEWS];
char name[DEBUG_MAX_NAME_LEN];
umode_t mode;
} debug_info_t;
typedef int (debug_header_proc_t) (debug_info_t* id,
struct debug_view* view,
int area,
debug_entry_t* entry,
char* out_buf);
typedef int (debug_format_proc_t) (debug_info_t* id,
struct debug_view* view, char* out_buf,
const char* in_buf);
typedef int (debug_prolog_proc_t) (debug_info_t* id,
struct debug_view* view,
char* out_buf);
typedef int (debug_input_proc_t) (debug_info_t* id,
struct debug_view* view,
struct file* file,
const char __user *user_buf,
size_t in_buf_size, loff_t* offset);
int debug_dflt_header_fn(debug_info_t* id, struct debug_view* view,
int area, debug_entry_t* entry, char* out_buf);
struct debug_view {
char name[DEBUG_MAX_NAME_LEN];
debug_prolog_proc_t* prolog_proc;
debug_header_proc_t* header_proc;
debug_format_proc_t* format_proc;
debug_input_proc_t* input_proc;
void* private_data;
};
extern struct debug_view debug_hex_ascii_view;
extern struct debug_view debug_raw_view;
extern struct debug_view debug_sprintf_view;
/* do NOT use the _common functions */
debug_entry_t* debug_event_common(debug_info_t* id, int level,
const void* data, int length);
debug_entry_t* debug_exception_common(debug_info_t* id, int level,
const void* data, int length);
/* Debug Feature API: */
debug_info_t *debug_register(const char *name, int pages, int nr_areas,
int buf_size);
debug_info_t *debug_register_mode(const char *name, int pages, int nr_areas,
int buf_size, umode_t mode, uid_t uid,
gid_t gid);
void debug_unregister(debug_info_t* id);
void debug_set_level(debug_info_t* id, int new_level);
void debug_set_critical(void);
void debug_stop_all(void);
static inline debug_entry_t*
debug_event(debug_info_t* id, int level, void* data, int length)
{
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_event_common(id,level,data,length);
}
static inline debug_entry_t*
debug_int_event(debug_info_t* id, int level, unsigned int tag)
{
unsigned int t=tag;
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_event_common(id,level,&t,sizeof(unsigned int));
}
static inline debug_entry_t *
debug_long_event (debug_info_t* id, int level, unsigned long tag)
{
unsigned long t=tag;
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_event_common(id,level,&t,sizeof(unsigned long));
}
static inline debug_entry_t*
debug_text_event(debug_info_t* id, int level, const char* txt)
{
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_event_common(id,level,txt,strlen(txt));
}
/*
* IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are
* stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details!
*/
extern debug_entry_t *
debug_sprintf_event(debug_info_t* id,int level,char *string,...)
__attribute__ ((format(printf, 3, 4)));
static inline debug_entry_t*
debug_exception(debug_info_t* id, int level, void* data, int length)
{
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_exception_common(id,level,data,length);
}
static inline debug_entry_t*
debug_int_exception(debug_info_t* id, int level, unsigned int tag)
{
unsigned int t=tag;
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_exception_common(id,level,&t,sizeof(unsigned int));
}
static inline debug_entry_t *
debug_long_exception (debug_info_t* id, int level, unsigned long tag)
{
unsigned long t=tag;
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_exception_common(id,level,&t,sizeof(unsigned long));
}
static inline debug_entry_t*
debug_text_exception(debug_info_t* id, int level, const char* txt)
{
if ((!id) || (level > id->level) || (id->pages_per_area == 0))
return NULL;
return debug_exception_common(id,level,txt,strlen(txt));
}
/*
* IMPORTANT: Use "%s" in sprintf format strings with care! Only pointers are
* stored in the s390dbf. See Documentation/s390/s390dbf.txt for more details!
*/
extern debug_entry_t *
debug_sprintf_exception(debug_info_t* id,int level,char *string,...)
__attribute__ ((format(printf, 3, 4)));
int debug_register_view(debug_info_t* id, struct debug_view* view);
int debug_unregister_view(debug_info_t* id, struct debug_view* view);
/*
define the debug levels:
- 0 No debugging output to console or syslog
- 1 Log internal errors to syslog, ignore check conditions
- 2 Log internal errors and check conditions to syslog
- 3 Log internal errors to console, log check conditions to syslog
- 4 Log internal errors and check conditions to console
- 5 panic on internal errors, log check conditions to console
- 6 panic on both, internal errors and check conditions
*/
#ifndef DEBUG_LEVEL
#define DEBUG_LEVEL 4
#endif
#define INTERNAL_ERRMSG(x,y...) "E" __FILE__ "%d: " x, __LINE__, y
#define INTERNAL_WRNMSG(x,y...) "W" __FILE__ "%d: " x, __LINE__, y
#define INTERNAL_INFMSG(x,y...) "I" __FILE__ "%d: " x, __LINE__, y
#define INTERNAL_DEBMSG(x,y...) "D" __FILE__ "%d: " x, __LINE__, y
#if DEBUG_LEVEL > 0
#define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
#define PRINT_INFO(x...) printk ( KERN_INFO PRINTK_HEADER x )
#define PRINT_WARN(x...) printk ( KERN_WARNING PRINTK_HEADER x )
#define PRINT_ERR(x...) printk ( KERN_ERR PRINTK_HEADER x )
#define PRINT_FATAL(x...) panic ( PRINTK_HEADER x )
#else
#define PRINT_DEBUG(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
#define PRINT_INFO(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
#define PRINT_WARN(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
#define PRINT_ERR(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
#define PRINT_FATAL(x...) printk ( KERN_DEBUG PRINTK_HEADER x )
#endif /* DASD_DEBUG */
#endif /* __KERNEL__ */
#endif /* DEBUG_H */
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