cam_debug.h

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    1 /*-
    2  * Macros for tracing/loging information in the CAM layer
    3  *
    4  * Copyright (c) 1997 Justin T. Gibbs.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions, and the following disclaimer,
   12  *    without modification, immediately at the beginning of the file.
   13  * 2. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/9.0/sys/cam/cam_debug.h 208911 2010-06-08 16:17:25Z mjacob $
   29  */
   30 #ifndef _CAM_CAM_DEBUG_H
   31 #define _CAM_CAM_DEBUG_H 1
   32 
   33 /*
   34  * Debugging flags.
   35  */
   36 typedef enum {
   37         CAM_DEBUG_NONE          = 0x00, /* no debugging */
   38         CAM_DEBUG_INFO          = 0x01, /* scsi commands, errors, data */ 
   39         CAM_DEBUG_TRACE         = 0x02, /* routine flow tracking */
   40         CAM_DEBUG_SUBTRACE      = 0x04, /* internal to routine flows */
   41         CAM_DEBUG_CDB           = 0x08, /* print out SCSI CDBs only */
   42         CAM_DEBUG_XPT           = 0x10, /* print out xpt scheduling */
   43         CAM_DEBUG_PERIPH        = 0x20, /* print out peripheral calls */
   44         CAM_DEBUG_PROBE         = 0x40  /* print out probe actions */
   45 } cam_debug_flags;
   46 
   47 #if defined(CAMDEBUG) && defined(_KERNEL)
   48 
   49 /* Path we want to debug */
   50 extern struct cam_path *cam_dpath;
   51 /* Current debug levels set */
   52 extern u_int32_t cam_dflags;
   53 /* Printf delay value (to prevent scrolling) */
   54 extern u_int32_t cam_debug_delay;
   55  
   56 /* Debugging macros. */
   57 #define CAM_DEBUGGED(path, flag)                        \
   58         ((cam_dflags & (flag))                          \
   59          && (cam_dpath != NULL)                         \
   60          && (xpt_path_comp(cam_dpath, path) >= 0)       \
   61          && (xpt_path_comp(cam_dpath, path) < 2))
   62 
   63 #define CAM_DEBUG(path, flag, printfargs)               \
   64         if ((cam_dflags & (flag))                       \
   65          && (cam_dpath != NULL)                         \
   66          && (xpt_path_comp(cam_dpath, path) >= 0)       \
   67          && (xpt_path_comp(cam_dpath, path) < 2)) {     \
   68                 xpt_print_path(path);                   \
   69                 printf printfargs;                      \
   70                 if (cam_debug_delay != 0)               \
   71                         DELAY(cam_debug_delay);         \
   72         }
   73 
   74 #define CAM_DEBUG_PRINT(flag, printfargs)               \
   75         if (cam_dflags & (flag)) {                      \
   76                 printf("cam_debug: ");                  \
   77                 printf printfargs;                      \
   78                 if (cam_debug_delay != 0)               \
   79                         DELAY(cam_debug_delay);         \
   80         }
   81 
   82 #define CAM_DEBUG_PATH_PRINT(flag, path, printfargs)    \
   83         if (cam_dflags & (flag)) {                      \
   84                 xpt_print(path, "cam_debug: ");         \
   85                 printf printfargs;                      \
   86                 if (cam_debug_delay != 0)               \
   87                         DELAY(cam_debug_delay);         \
   88         }
   89 
   90 #else /* !CAMDEBUG || !_KERNEL */
   91 
   92 #define CAM_DEBUGGED(A, B)      0
   93 #define CAM_DEBUG(A, B, C)
   94 #define CAM_DEBUG_PRINT(A, B)
   95 #define CAM_DEBUG_PATH_PRINT(A, B, C)
   96 
   97 #endif /* CAMDEBUG && _KERNEL */
   98 
   99 #endif /* _CAM_CAM_DEBUG_H */

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FreeBSD/Linux Kernel Cross Reference sys/cam/cam_debug.h

FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_debug.h