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#ifndef _FTAPE_TRACING_H
#define _FTAPE_TRACING_H
/*
* Copyright (C) 1994-1996 Bas Laarhoven,
* (C) 1996-1997 Claus-Justus Heine.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Source: /homes/cvs/ftape-stacked/ftape/lowlevel/ftape-tracing.h,v $
* $Revision: 1.2 $
* $Date: 1997/10/05 19:18:28 $
*
* This file contains definitions that eases the debugging of the
* QIC-40/80/3010/3020 floppy-tape driver "ftape" for Linux.
*/
#include <linux/kernel.h>
/*
* Be very careful with TRACE_EXIT and TRACE_ABORT.
*
* if (something) TRACE_EXIT error;
*
* will NOT work. Use
*
* if (something) {
* TRACE_EXIT error;
* }
*
* instead. Maybe a bit dangerous, but save lots of lines of code.
*/
#define LL_X "%d/%d KB"
#define LL(x) (unsigned int)((__u64)(x)>>10), (unsigned int)((x)&1023)
typedef enum {
ft_t_nil = -1,
ft_t_bug,
ft_t_err,
ft_t_warn,
ft_t_info,
ft_t_noise,
ft_t_flow,
ft_t_fdc_dma,
ft_t_data_flow,
ft_t_any
} ft_trace_t;
#ifdef CONFIG_FT_NO_TRACE_AT_ALL
/* the compiler will optimize away most TRACE() macros
*/
#define FT_TRACE_TOP_LEVEL ft_t_bug
#define TRACE_FUN(level) do {} while(0)
#define TRACE_EXIT return
#define TRACE(l, m, i...) \
{ \
if ((ft_trace_t)(l) == FT_TRACE_TOP_LEVEL) { \
printk(KERN_INFO"ftape%s(%s):\n" \
KERN_INFO m".\n" ,__FILE__, __FUNCTION__ , ##i); \
} \
}
#define SET_TRACE_LEVEL(l) if ((l) == (l)) do {} while(0)
#define TRACE_LEVEL FT_TRACE_TOP_LEVEL
#else
#ifdef CONFIG_FT_NO_TRACE
/* the compiler will optimize away many TRACE() macros
* the ftape_simple_trace_call() function simply increments
* the function nest level.
*/
#define FT_TRACE_TOP_LEVEL ft_t_warn
#define TRACE_FUN(level) ftape_function_nest_level++
#define TRACE_EXIT ftape_function_nest_level--; return
#else
#ifdef CONFIG_FT_FULL_DEBUG
#define FT_TRACE_TOP_LEVEL ft_t_any
#else
#define FT_TRACE_TOP_LEVEL ft_t_flow
#endif
#define TRACE_FUN(level) \
const ft_trace_t _tracing = level; \
if (ftape_tracing >= (ft_trace_t)(level) && \
(ft_trace_t)(level) <= FT_TRACE_TOP_LEVEL) \
ftape_trace_call(__FILE__, __FUNCTION__); \
ftape_function_nest_level ++;
#define TRACE_EXIT \
--ftape_function_nest_level; \
if (ftape_tracing >= (ft_trace_t)(_tracing) && \
(ft_trace_t)(_tracing) <= FT_TRACE_TOP_LEVEL) \
ftape_trace_exit(__FILE__, __FUNCTION__); \
return
#endif
#define TRACE(l, m, i...) \
{ \
if (ftape_tracing >= (ft_trace_t)(l) && \
(ft_trace_t)(l) <= FT_TRACE_TOP_LEVEL) { \
ftape_trace_log(__FILE__, __FUNCTION__); \
printk(m".\n" ,##i); \
} \
}
#define SET_TRACE_LEVEL(l) \
{ \
if ((ft_trace_t)(l) <= FT_TRACE_TOP_LEVEL) { \
ftape_tracing = (ft_trace_t)(l); \
} else { \
ftape_tracing = FT_TRACE_TOP_LEVEL; \
} \
}
#define TRACE_LEVEL \
((ftape_tracing <= FT_TRACE_TOP_LEVEL) ? ftape_tracing : FT_TRACE_TOP_LEVEL)
/* Global variables declared in tracing.c
*/
extern ft_trace_t ftape_tracing; /* sets default level */
extern int ftape_function_nest_level;
/* Global functions declared in tracing.c
*/
extern void ftape_trace_call(const char *file, const char *name);
extern void ftape_trace_exit(const char *file, const char *name);
extern void ftape_trace_log (const char *file, const char *name);
#endif /* !defined(CONFIG_FT_NO_TRACE_AT_ALL) */
/*
* Abort with a message.
*/
#define TRACE_ABORT(res, i...) \
{ \
TRACE(i); \
TRACE_EXIT res; \
}
/* The following transforms the common "if(result < 0) ... " into a
* one-liner.
*/
#define _TRACE_CATCH(level, fun, action) \
{ \
int _res = (fun); \
if (_res < 0) { \
do { action /* */ ; } while(0); \
TRACE_ABORT(_res, level, "%s failed: %d", #fun, _res); \
} \
}
#define TRACE_CATCH(fun, fail) _TRACE_CATCH(ft_t_err, fun, fail)
/* Abort the current function when signalled. This doesn't belong here,
* but rather into ftape-rw.h (maybe)
*/
#define FT_SIGNAL_EXIT(sig_mask) \
if (sigtestsetmask(¤t->pending.signal, sig_mask)) { \
TRACE_ABORT(-EINTR, \
ft_t_warn, \
"interrupted by non-blockable signal"); \
}
#endif /* _FTAPE_TRACING_H */
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