[mirror_spl-debian.git] / include / sys / debug.h

#ifndef _SPL_DEBUG_H
#define _SPL_DEBUG_H

#include <linux/sched.h> /* THREAD_SIZE */
#include <linux/proc_fs.h>

extern unsigned long spl_debug_mask;
extern unsigned long spl_debug_subsys;

#define S_UNDEFINED   0x00000001
#define S_ATOMIC      0x00000002
#define S_KOBJ        0x00000004
#define S_VNODE       0x00000008
#define S_TIME        0x00000010
#define S_RWLOCK      0x00000020
#define S_THREAD      0x00000040
#define S_CONDVAR     0x00000080
#define S_MUTEX       0x00000100
#define S_RNG         0x00000200
#define S_TASKQ       0x00000400
#define S_KMEM        0x00000800
#define S_DEBUG       0x00001000
#define S_GENERIC     0x00002000
#define S_PROC        0x00004000
#define S_MODULE      0x00008000

#define D_TRACE       0x00000001
#define D_INFO        0x00000002
#define D_WARNING     0x00000004
#define D_ERROR       0x00000008
#define D_EMERG       0x00000010
#define D_CONSOLE     0x00000020
#define D_IOCTL       0x00000040
#define D_DPRINTF     0x00000080
#define D_OTHER       0x00000100

#define D_CANTMASK    (D_ERROR | D_EMERG | D_WARNING | D_CONSOLE)
#define DEBUG_SUBSYSTEM S_UNDEFINED

int debug_init(void);
void debug_fini(void);
int spl_debug_mask2str(char *str, int size, unsigned long mask, int is_subsys);
int spl_debug_str2mask(unsigned long *mask, const char *str, int is_subsys);

extern unsigned long spl_debug_subsys;
extern unsigned long spl_debug_mask;
extern unsigned long spl_debug_printk;
extern int spl_debug_mb;
extern unsigned int spl_debug_binary;
extern unsigned int spl_debug_catastrophe;
extern unsigned int spl_debug_panic_on_bug;
extern char spl_debug_file_path[PATH_MAX];
extern unsigned int spl_console_ratelimit;
extern long spl_console_max_delay;
extern long spl_console_min_delay;
extern unsigned int spl_console_backoff;
extern unsigned int spl_debug_stack;

#define TCD_MAX_PAGES                   (5 << (20 - PAGE_SHIFT))
#define TCD_STOCK_PAGES                 (TCD_MAX_PAGES)
#define TRACE_CONSOLE_BUFFER_SIZE       1024

#define SPL_DEFAULT_MAX_DELAY           (600 * HZ)
#define SPL_DEFAULT_MIN_DELAY           ((HZ + 1) / 2)
#define SPL_DEFAULT_BACKOFF             2

#define DL_NOTHREAD                     0x0001 /* Do not create a new thread */
#define DL_SINGLE_CPU                   0x0002 /* Collect pages from this CPU */

typedef struct dumplog_priv {
        wait_queue_head_t dp_waitq;
        pid_t dp_pid;
        int dp_flags;
        atomic_t dp_done;
} dumplog_priv_t;

typedef struct {
        unsigned long cdls_next;
        int           cdls_count;
        long          cdls_delay;
} spl_debug_limit_state_t;

/* Three trace data types */
typedef enum {
        TCD_TYPE_PROC,
        TCD_TYPE_SOFTIRQ,
        TCD_TYPE_IRQ,
        TCD_TYPE_MAX
} tcd_type_t;

union trace_data_union {
	struct trace_cpu_data {
		/* pages with trace records not yet processed by tracefiled */
		struct list_head        tcd_pages;
		/* number of pages on ->tcd_pages */
		unsigned long           tcd_cur_pages;
		/* Max number of pages allowed on ->tcd_pages */
		unsigned long           tcd_max_pages;

		/*
		 * preallocated pages to write trace records into. Pages from
		 * ->tcd_stock_pages are moved to ->tcd_pages by spl_debug_msg().
		 *
		 * This list is necessary, because on some platforms it's
		 * impossible to perform efficient atomic page allocation in a
		 * non-blockable context.
		 *
		 * Such platforms fill ->tcd_stock_pages "on occasion", when
		 * tracing code is entered in blockable context.
		 *
		 * trace_get_tage_try() tries to get a page from
		 * ->tcd_stock_pages first and resorts to atomic page
		 * allocation only if this queue is empty. ->tcd_stock_pages
		 * is replenished when tracing code is entered in blocking
		 * context (darwin-tracefile.c:trace_get_tcd()). We try to
		 * maintain TCD_STOCK_PAGES (40 by default) pages in this
		 * queue. Atomic allocation is only required if more than
		 * TCD_STOCK_PAGES pagesful are consumed by trace records all
		 * emitted in non-blocking contexts. Which is quite unlikely.
		 */
		struct list_head        tcd_stock_pages;
		/* number of pages on ->tcd_stock_pages */
		unsigned long           tcd_cur_stock_pages;

		unsigned short          tcd_shutting_down;
		unsigned short          tcd_cpu;
		unsigned short          tcd_type;
		/* The factors to share debug memory. */
		unsigned short          tcd_pages_factor;
	} tcd;
	char __pad[L1_CACHE_ALIGN(sizeof(struct trace_cpu_data))];
};

extern union trace_data_union (*trace_data[TCD_TYPE_MAX])[NR_CPUS];

#define tcd_for_each(tcd, i, j)                                       \
    for (i = 0; trace_data[i] != NULL; i++)                           \
        for (j = 0, ((tcd) = &(*trace_data[i])[j].tcd);               \
             j < num_possible_cpus(); j++, (tcd) = &(*trace_data[i])[j].tcd)

#define tcd_for_each_type_lock(tcd, i)                                \
    for (i = 0; trace_data[i] &&                                      \
         (tcd = &(*trace_data[i])[smp_processor_id()].tcd) &&         \
         trace_lock_tcd(tcd); trace_unlock_tcd(tcd), i++)

struct trace_page {
	struct page *    page;    /* page itself */
	struct list_head linkage;  /* Used by lists in trace_data_union */
	unsigned int     used;     /* number of bytes used within this page */
	unsigned short   cpu;      /* cpu that owns this page */
	unsigned short   type;     /* type(context) of this page */
};

struct page_collection {
        struct list_head  pc_pages;
        spinlock_t        pc_lock;
        int               pc_want_daemon_pages;
};

#define SBUG()            spl_debug_bug(__FILE__, __FUNCTION__, __LINE__, 0);

#ifdef  __ia64__
#define CDEBUG_STACK() (THREAD_SIZE -                                   \
                       ((unsigned long)__builtin_dwarf_cfa() &          \
                       (THREAD_SIZE - 1)))
#else
#define CDEBUG_STACK() (THREAD_SIZE -                                   \
                       ((unsigned long)__builtin_frame_address(0) &     \
                        (THREAD_SIZE - 1)))
# endif /* __ia64__ */

/* DL_SINGLE_CPU flag is passed to spl_debug_bug() because we are about
 * to over run our stack and likely damage at least one other unknown
 * thread stack.  We must finish generating the needed debug info within
 * this thread context because once we yeild the CPU its very likely
 * the system will crash.
 */
#define __CHECK_STACK(file, func, line)                                 \
do {                                                                    \
        if (unlikely(CDEBUG_STACK() > spl_debug_stack)) {               \
                spl_debug_stack = CDEBUG_STACK();                       \
                                                                        \
                if (unlikely(CDEBUG_STACK() > (4 * THREAD_SIZE) / 5)) { \
                        spl_debug_msg(NULL, D_TRACE, D_WARNING,         \
                                      file, func, line, "Error "        \
                                      "exceeded maximum safe stack "    \
                                      "size (%lu/%lu)\n",               \
                                      CDEBUG_STACK(), THREAD_SIZE);     \
                        spl_debug_bug(file, func, line, DL_SINGLE_CPU); \
                }                                                       \
        }                                                               \
} while (0)

#define CHECK_STACK()   __CHECK_STACK(__FILE__, __func__, __LINE__)

/* ASSERTION that is safe to use within the debug system */
#define __ASSERT(cond)                                                  \
do {                                                                    \
        if (unlikely(!(cond))) {                                        \
                printk(KERN_ERR "ASSERTION(" #cond ") failed");         \
                BUG();                                                  \
        }                                                               \
} while (0)

#define __ASSERT_TAGE_INVARIANT(tage)                                   \
do {                                                                    \
        __ASSERT(tage != NULL);                                         \
        __ASSERT(tage->page != NULL);                                   \
        __ASSERT(tage->used <= PAGE_SIZE);                              \
        __ASSERT(page_count(tage->page) > 0);                           \
} while(0)

/* ASSERTION that will debug log used outside the debug sysytem */
#define ASSERT(cond)                                                    \
do {                                                                    \
        CHECK_STACK();                                                  \
                                                                        \
        if (unlikely(!(cond))) {                                        \
                spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG,           \
                              __FILE__, __FUNCTION__, __LINE__,         \
                              "ASSERTION(" #cond ") failed\n");         \
                SBUG();                                                 \
        }                                                               \
} while (0)

#define ASSERTF(cond, fmt, a...)                                        \
do {                                                                    \
        CHECK_STACK();                                                  \
                                                                        \
        if (unlikely(!(cond))) {                                        \
                spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG,           \
                              __FILE__, __FUNCTION__, __LINE__,         \
                              "ASSERTION(" #cond ") failed:" fmt,       \
                                 ## a);                                 \
                SBUG();                                                 \
        }                                                               \
} while (0)

#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE, FMT, CAST)                  \
do {                                                                    \
        CHECK_STACK();                                                  \
                                                                        \
        if (!((TYPE)(LEFT) OP (TYPE)(RIGHT))) {                         \
                spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG,           \
                              __FILE__, __FUNCTION__, __LINE__,         \
                              "VERIFY3(" FMT " " #OP " " FMT ")\n",     \
                              CAST (LEFT), CAST (RIGHT));               \
                SBUG();                                                 \
        }                                                               \
} while (0)

#define VERIFY3S(x,y,z) VERIFY3_IMPL(x, y, z, int64_t, "%ld", (long))
#define VERIFY3U(x,y,z) VERIFY3_IMPL(x, y, z, uint64_t, "%lu", (unsigned long))
#define VERIFY3P(x,y,z) VERIFY3_IMPL(x, y, z, uintptr_t, "%p", (void *))

#define ASSERT3S(x,y,z) VERIFY3S(x, y, z)
#define ASSERT3U(x,y,z) VERIFY3U(x, y, z)
#define ASSERT3P(x,y,z) VERIFY3P(x, y, z)

#define VERIFY(x)       ASSERT(x)

#define spl_debug_msg(cdls, subsys, mask, file, fn, line, format, a...) \
        spl_debug_vmsg(cdls, subsys, mask, file, fn,                    \
                       line, NULL, NULL, format, ##a)

#define __CDEBUG(cdls, subsys, mask, format, a...)                      \
do {                                                                    \
        CHECK_STACK();                                                  \
                                                                        \
        if (((mask) & D_CANTMASK) != 0 ||                               \
            ((spl_debug_mask & (mask)) != 0 &&                          \
             (spl_debug_subsys & (subsys)) != 0))                       \
                spl_debug_msg(cdls, subsys, mask,                       \
                              __FILE__, __FUNCTION__, __LINE__,         \
                              format, ## a);                            \
} while (0)

#define CDEBUG(mask, format, a...)                                      \
        __CDEBUG(NULL, DEBUG_SUBSYSTEM, mask, format, ## a)

#define __CDEBUG_LIMIT(subsys, mask, format, a...)                      \
do {                                                                    \
        static spl_debug_limit_state_t cdls;                            \
                                                                        \
        __CDEBUG(&cdls, subsys, mask, format, ## a);                    \
} while (0)

#define CDEBUG_LIMIT(mask, format, a...)                                \
        __CDEBUG_LIMIT(DEBUG_SUBSYSTEM, mask, format, ## a)

#define CWARN(fmt, a...)               CDEBUG_LIMIT(D_WARNING, fmt, ## a)
#define CERROR(fmt, a...)              CDEBUG_LIMIT(D_ERROR, fmt, ## a)
#define CEMERG(fmt, a...)              CDEBUG_LIMIT(D_EMERG, fmt, ## a)
#define CONSOLE(mask, fmt, a...)       CDEBUG(D_CONSOLE | (mask), fmt, ## a)

#define GOTO(label, rc)                                                 \
do {                                                                    \
        long GOTO__ret = (long)(rc);                                    \
        CDEBUG(D_TRACE,"Process leaving via %s (rc=%lu : %ld : %lx)\n", \
               #label, (unsigned long)GOTO__ret, (signed long)GOTO__ret,\
               (signed long)GOTO__ret);                                 \
        goto label;                                                     \
} while (0)

#define RETURN(rc)                                                      \
do {                                                                    \
        typeof(rc) RETURN__ret = (rc);                                  \
        CDEBUG(D_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n",       \
               (long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret);\
        return RETURN__ret;                                             \
} while (0)

#define ENTRY                                                           \
do {                                                                    \
        CDEBUG(D_TRACE, "Process entered\n");                           \
} while (0)

#define EXIT                                                            \
do {                                                                    \
        CDEBUG(D_TRACE, "Process leaving\n");                           \
} while(0)

extern int spl_debug_vmsg(spl_debug_limit_state_t *cdls, int subsys, int mask,
                          const char *file, const char *fn, const int line,
                          const char *format1, va_list args, const char *format2, ...);

extern unsigned long spl_debug_set_mask(unsigned long mask);
extern unsigned long spl_debug_get_mask(void);
extern unsigned long spl_debug_set_subsys(unsigned long mask);
extern unsigned long spl_debug_get_subsys(void);
extern int spl_debug_set_mb(int mb);
extern int spl_debug_get_mb(void);

extern int spl_debug_dumplog(int flags);
extern void spl_debug_dumpstack(struct task_struct *tsk);
extern void spl_debug_bug(char *file, const char *func, const int line, int flags);

extern int spl_debug_clear_buffer(void);
extern int spl_debug_mark_buffer(char *text);

#endif /* SPL_DEBUG_H */
Commit	Line	Data
f4b37741	1	#ifndef _SPL_DEBUG_H
	2	#define _SPL_DEBUG_H
	3
57d1b188	4	#include <linux/sched.h> /* THREAD_SIZE */
	5	#include <linux/proc_fs.h>
	6
8d0f1ee9	7	extern unsigned long spl_debug_mask;
	8	extern unsigned long spl_debug_subsys;
	9
57d1b188	10	#define S_UNDEFINED 0x00000001
	11	#define S_ATOMIC 0x00000002
	12	#define S_KOBJ 0x00000004
	13	#define S_VNODE 0x00000008
	14	#define S_TIME 0x00000010
	15	#define S_RWLOCK 0x00000020
	16	#define S_THREAD 0x00000040
	17	#define S_CONDVAR 0x00000080
	18	#define S_MUTEX 0x00000100
	19	#define S_RNG 0x00000200
	20	#define S_TASKQ 0x00000400
	21	#define S_KMEM 0x00000800
	22	#define S_DEBUG 0x00001000
	23	#define S_GENERIC 0x00002000
	24	#define S_PROC 0x00004000
937879f1	25	#define S_MODULE 0x00008000
57d1b188	26
	27	#define D_TRACE 0x00000001
	28	#define D_INFO 0x00000002
	29	#define D_WARNING 0x00000004
	30	#define D_ERROR 0x00000008
	31	#define D_EMERG 0x00000010
	32	#define D_CONSOLE 0x00000020
	33	#define D_IOCTL 0x00000040
	34	#define D_DPRINTF 0x00000080
	35	#define D_OTHER 0x00000100
	36
	37	#define D_CANTMASK (D_ERROR \| D_EMERG \| D_WARNING \| D_CONSOLE)
	38	#define DEBUG_SUBSYSTEM S_UNDEFINED
	39
	40	int debug_init(void);
	41	void debug_fini(void);
	42	int spl_debug_mask2str(char *str, int size, unsigned long mask, int is_subsys);
	43	int spl_debug_str2mask(unsigned long mask, const char str, int is_subsys);
	44
	45	extern unsigned long spl_debug_subsys;
	46	extern unsigned long spl_debug_mask;
	47	extern unsigned long spl_debug_printk;
	48	extern int spl_debug_mb;
	49	extern unsigned int spl_debug_binary;
	50	extern unsigned int spl_debug_catastrophe;
	51	extern unsigned int spl_debug_panic_on_bug;
	52	extern char spl_debug_file_path[PATH_MAX];
	53	extern unsigned int spl_console_ratelimit;
	54	extern long spl_console_max_delay;
	55	extern long spl_console_min_delay;
	56	extern unsigned int spl_console_backoff;
	57	extern unsigned int spl_debug_stack;
	58
b831734a	59	#define TCD_MAX_PAGES (5 << (20 - PAGE_SHIFT))
	60	#define TCD_STOCK_PAGES (TCD_MAX_PAGES)
	61	#define TRACE_CONSOLE_BUFFER_SIZE 1024
57d1b188	62
b831734a	63	#define SPL_DEFAULT_MAX_DELAY (600 * HZ)
	64	#define SPL_DEFAULT_MIN_DELAY ((HZ + 1) / 2)
	65	#define SPL_DEFAULT_BACKOFF 2
57d1b188	66
7fea96c0	67	#define DL_NOTHREAD 0x0001 /* Do not create a new thread */
b831734a	68	#define DL_SINGLE_CPU 0x0002 /* Collect pages from this CPU */
7fea96c0	69
	70	typedef struct dumplog_priv {
	71	wait_queue_head_t dp_waitq;
	72	pid_t dp_pid;
	73	int dp_flags;
	74	atomic_t dp_done;
	75	} dumplog_priv_t;
	76
57d1b188	77	typedef struct {
	78	unsigned long cdls_next;
	79	int cdls_count;
	80	long cdls_delay;
	81	} spl_debug_limit_state_t;
	82
	83	/* Three trace data types */
	84	typedef enum {
	85	TCD_TYPE_PROC,
	86	TCD_TYPE_SOFTIRQ,
	87	TCD_TYPE_IRQ,
	88	TCD_TYPE_MAX
	89	} tcd_type_t;
	90
	91	union trace_data_union {
	92	struct trace_cpu_data {
	93	/* pages with trace records not yet processed by tracefiled */
	94	struct list_head tcd_pages;
	95	/* number of pages on ->tcd_pages */
	96	unsigned long tcd_cur_pages;
	97	/* Max number of pages allowed on ->tcd_pages */
	98	unsigned long tcd_max_pages;
	99
	100	/*
	101	* preallocated pages to write trace records into. Pages from
	102	* ->tcd_stock_pages are moved to ->tcd_pages by spl_debug_msg().
	103	*
	104	* This list is necessary, because on some platforms it's
	105	* impossible to perform efficient atomic page allocation in a
	106	* non-blockable context.
	107	*
	108	* Such platforms fill ->tcd_stock_pages "on occasion", when
	109	* tracing code is entered in blockable context.
	110	*
	111	* trace_get_tage_try() tries to get a page from
	112	* ->tcd_stock_pages first and resorts to atomic page
	113	* allocation only if this queue is empty. ->tcd_stock_pages
	114	* is replenished when tracing code is entered in blocking
	115	* context (darwin-tracefile.c:trace_get_tcd()). We try to
	116	* maintain TCD_STOCK_PAGES (40 by default) pages in this
	117	* queue. Atomic allocation is only required if more than
	118	* TCD_STOCK_PAGES pagesful are consumed by trace records all
	119	* emitted in non-blocking contexts. Which is quite unlikely.
	120	*/
	121	struct list_head tcd_stock_pages;
	122	/* number of pages on ->tcd_stock_pages */
	123	unsigned long tcd_cur_stock_pages;
	124
	125	unsigned short tcd_shutting_down;
	126	unsigned short tcd_cpu;
	127	unsigned short tcd_type;
	128	/* The factors to share debug memory. */
	129	unsigned short tcd_pages_factor;
	130	} tcd;
	131	char __pad[L1_CACHE_ALIGN(sizeof(struct trace_cpu_data))];
	132	};
	133
	134	extern union trace_data_union (*trace_data[TCD_TYPE_MAX])[NR_CPUS];
	135
	136	#define tcd_for_each(tcd, i, j) \
	137	for (i = 0; trace_data[i] != NULL; i++) \
	138	for (j = 0, ((tcd) = &(*trace_data[i])[j].tcd); \
	139	j < num_possible_cpus(); j++, (tcd) = &(*trace_data[i])[j].tcd)
	140
141	#define tcd_for_each_type_lock(tcd, i) \
142	for (i = 0; trace_data[i] && \
143	(tcd = &(*trace_data[i])[smp_processor_id()].tcd) && \
144	trace_lock_tcd(tcd); trace_unlock_tcd(tcd), i++)
145
146	struct trace_page {
147	struct page * page; /* page itself */
148	struct list_head linkage; /* Used by lists in trace_data_union */
149	unsigned int used; /* number of bytes used within this page */
150	unsigned short cpu; /* cpu that owns this page */
151	unsigned short type; /* type(context) of this page */
152	};
153
154	struct page_collection {
155	struct list_head pc_pages;
156	spinlock_t pc_lock;
157	int pc_want_daemon_pages;
158	};
159
b831734a	160	#define SBUG() spl_debug_bug(__FILE__, __FUNCTION__, __LINE__, 0);
2fae1b3d	161
937879f1	162	#ifdef __ia64__
	163	#define CDEBUG_STACK() (THREAD_SIZE - \
	164	((unsigned long)__builtin_dwarf_cfa() & \
	165	(THREAD_SIZE - 1)))
	166	#else
	167	#define CDEBUG_STACK() (THREAD_SIZE - \
	168	((unsigned long)__builtin_frame_address(0) & \
	169	(THREAD_SIZE - 1)))
	170	# endif /* __ia64__ */
	171
b831734a	172	/* DL_SINGLE_CPU flag is passed to spl_debug_bug() because we are about
	173	* to over run our stack and likely damage at least one other unknown
	174	* thread stack. We must finish generating the needed debug info within
	175	* this thread context because once we yeild the CPU its very likely
	176	* the system will crash.
7fea96c0	177	*/
937879f1	178	#define __CHECK_STACK(file, func, line) \
937879f1	179	do { \
b831734a	180	if (unlikely(CDEBUG_STACK() > spl_debug_stack)) { \
b831734a	181	spl_debug_stack = CDEBUG_STACK(); \
937879f1	182	\
b831734a	183	if (unlikely(CDEBUG_STACK() > (4 * THREAD_SIZE) / 5)) { \
	184	spl_debug_msg(NULL, D_TRACE, D_WARNING, \
	185	file, func, line, "Error " \
	186	"exceeded maximum safe stack " \
	187	"size (%lu/%lu)\n", \
	188	CDEBUG_STACK(), THREAD_SIZE); \
	189	spl_debug_bug(file, func, line, DL_SINGLE_CPU); \
	190	} \
937879f1	191	} \
	192	} while (0)
	193
892d5106	194	#define CHECK_STACK() __CHECK_STACK(__FILE__, __func__, __LINE__)
937879f1	195
57d1b188	196	/* ASSERTION that is safe to use within the debug system */
b831734a	197	#define __ASSERT(cond) \
	198	do { \
	199	if (unlikely(!(cond))) { \
	200	printk(KERN_ERR "ASSERTION(" #cond ") failed"); \
6e605b6e	201	BUG(); \
b831734a	202	} \
57d1b188	203	} while (0)
57d1b188	204
b831734a	205	#define __ASSERT_TAGE_INVARIANT(tage) \
	206	do { \
	207	__ASSERT(tage != NULL); \
	208	__ASSERT(tage->page != NULL); \
	209	__ASSERT(tage->used <= PAGE_SIZE); \
	210	__ASSERT(page_count(tage->page) > 0); \
57d1b188	211	} while(0)
	212
	213	/* ASSERTION that will debug log used outside the debug sysytem */
	214	#define ASSERT(cond) \
	215	do { \
b831734a	216	CHECK_STACK(); \
b831734a	217	\
57d1b188	218	if (unlikely(!(cond))) { \
	219	spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
	220	__FILE__, __FUNCTION__, __LINE__, \
	221	"ASSERTION(" #cond ") failed\n"); \
b831734a	222	SBUG(); \
b831734a	223	} \
57d1b188	224	} while (0)
	225
	226	#define ASSERTF(cond, fmt, a...) \
	227	do { \
b831734a	228	CHECK_STACK(); \
b831734a	229	\
57d1b188	230	if (unlikely(!(cond))) { \
	231	spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
	232	__FILE__, __FUNCTION__, __LINE__, \
	233	"ASSERTION(" #cond ") failed:" fmt, \
	234	## a); \
b831734a	235	SBUG(); \
57d1b188	236	} \
	237	} while (0)
	238
	239	#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE, FMT, CAST) \
	240	do { \
b831734a	241	CHECK_STACK(); \
	242	\
	243	if (!((TYPE)(LEFT) OP (TYPE)(RIGHT))) { \
57d1b188	244	spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
	245	__FILE__, __FUNCTION__, __LINE__, \
	246	"VERIFY3(" FMT " " #OP " " FMT ")\n", \
b831734a	247	CAST (LEFT), CAST (RIGHT)); \
b831734a	248	SBUG(); \
57d1b188	249	} \
	250	} while (0)
	251
	252	#define VERIFY3S(x,y,z) VERIFY3_IMPL(x, y, z, int64_t, "%ld", (long))
	253	#define VERIFY3U(x,y,z) VERIFY3_IMPL(x, y, z, uint64_t, "%lu", (unsigned long))
	254	#define VERIFY3P(x,y,z) VERIFY3_IMPL(x, y, z, uintptr_t, "%p", (void *))
	255
	256	#define ASSERT3S(x,y,z) VERIFY3S(x, y, z)
	257	#define ASSERT3U(x,y,z) VERIFY3U(x, y, z)
	258	#define ASSERT3P(x,y,z) VERIFY3P(x, y, z)
	259
b831734a	260	#define VERIFY(x) ASSERT(x)
57d1b188	261
	262	#define spl_debug_msg(cdls, subsys, mask, file, fn, line, format, a...) \
	263	spl_debug_vmsg(cdls, subsys, mask, file, fn, \
	264	line, NULL, NULL, format, ##a)
	265
57d1b188	266	#define __CDEBUG(cdls, subsys, mask, format, a...) \
	267	do { \
	268	CHECK_STACK(); \
	269	\
	270	if (((mask) & D_CANTMASK) != 0 \|\| \
	271	((spl_debug_mask & (mask)) != 0 && \
	272	(spl_debug_subsys & (subsys)) != 0)) \
	273	spl_debug_msg(cdls, subsys, mask, \
	274	__FILE__, __FUNCTION__, __LINE__, \
	275	format, ## a); \
	276	} while (0)
	277
	278	#define CDEBUG(mask, format, a...) \
	279	__CDEBUG(NULL, DEBUG_SUBSYSTEM, mask, format, ## a)
	280
	281	#define __CDEBUG_LIMIT(subsys, mask, format, a...) \
	282	do { \
	283	static spl_debug_limit_state_t cdls; \
	284	\
	285	__CDEBUG(&cdls, subsys, mask, format, ## a); \
	286	} while (0)
	287
	288	#define CDEBUG_LIMIT(mask, format, a...) \
	289	__CDEBUG_LIMIT(DEBUG_SUBSYSTEM, mask, format, ## a)
	290
57d1b188	291	#define CWARN(fmt, a...) CDEBUG_LIMIT(D_WARNING, fmt, ## a)
	292	#define CERROR(fmt, a...) CDEBUG_LIMIT(D_ERROR, fmt, ## a)
	293	#define CEMERG(fmt, a...) CDEBUG_LIMIT(D_EMERG, fmt, ## a)
	294	#define CONSOLE(mask, fmt, a...) CDEBUG(D_CONSOLE \| (mask), fmt, ## a)
	295
	296	#define GOTO(label, rc) \
	297	do { \
	298	long GOTO__ret = (long)(rc); \
	299	CDEBUG(D_TRACE,"Process leaving via %s (rc=%lu : %ld : %lx)\n", \
	300	#label, (unsigned long)GOTO__ret, (signed long)GOTO__ret,\
	301	(signed long)GOTO__ret); \
	302	goto label; \
	303	} while (0)
	304
	305	#define RETURN(rc) \
	306	do { \
	307	typeof(rc) RETURN__ret = (rc); \
	308	CDEBUG(D_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n", \
	309	(long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret);\
	310	return RETURN__ret; \
	311	} while (0)
	312
	313	#define ENTRY \
	314	do { \
	315	CDEBUG(D_TRACE, "Process entered\n"); \
	316	} while (0)
	317
	318	#define EXIT \
	319	do { \
	320	CDEBUG(D_TRACE, "Process leaving\n"); \
	321	} while(0)
	322
	323	extern int spl_debug_vmsg(spl_debug_limit_state_t *cdls, int subsys, int mask,
b831734a	324	const char file, const char fn, const int line,
b831734a	325	const char format1, va_list args, const char format2, ...);
57d1b188	326
	327	extern unsigned long spl_debug_set_mask(unsigned long mask);
	328	extern unsigned long spl_debug_get_mask(void);
	329	extern unsigned long spl_debug_set_subsys(unsigned long mask);
	330	extern unsigned long spl_debug_get_subsys(void);
	331	extern int spl_debug_set_mb(int mb);
	332	extern int spl_debug_get_mb(void);
	333
7fea96c0	334	extern int spl_debug_dumplog(int flags);
57d1b188	335	extern void spl_debug_dumpstack(struct task_struct *tsk);
7fea96c0	336	extern void spl_debug_bug(char file, const char func, const int line, int flags);
57d1b188	337
	338	extern int spl_debug_clear_buffer(void);
	339	extern int spl_debug_mark_buffer(char *text);
8d0f1ee9	340
f4b37741	341	#endif /* SPL_DEBUG_H */