The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/cam/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  * $FreeBSD$
   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_flags;
   45 
   46 #if defined(CAMDEBUG) && defined(_KERNEL)
   47 
   48 /* Path we want to debug */
   49 extern struct cam_path *cam_dpath;
   50 /* Current debug levels set */
   51 extern u_int32_t cam_dflags;
   52 /* Printf delay value (to prevent scrolling) */
   53 extern u_int32_t cam_debug_delay;
   54  
   55 /* Debugging macros. */
   56 #define CAM_DEBUGGED(path, flag)                        \
   57         ((cam_dflags & (flag))                          \
   58          && (cam_dpath != NULL)                         \
   59          && (xpt_path_comp(cam_dpath, path) >= 0)       \
   60          && (xpt_path_comp(cam_dpath, path) < 2))
   61 #define CAM_DEBUG(path, flag, printfargs)               \
   62         if ((cam_dflags & (flag))                       \
   63          && (cam_dpath != NULL)                         \
   64          && (xpt_path_comp(cam_dpath, path) >= 0)       \
   65          && (xpt_path_comp(cam_dpath, path) < 2)) {     \
   66                 xpt_print_path(path);                   \
   67                 printf printfargs;                      \
   68                 if (cam_debug_delay != 0)               \
   69                         DELAY(cam_debug_delay);         \
   70         }
   71 #define CAM_DEBUG_PRINT(flag, printfargs)               \
   72         if (cam_dflags & (flag)) {                      \
   73                 printf("cam_debug: ");                  \
   74                 printf printfargs;                      \
   75                 if (cam_debug_delay != 0)               \
   76                         DELAY(cam_debug_delay);         \
   77         }
   78 
   79 #else /* !CAMDEBUG || !_KERNEL */
   80 
   81 #define CAM_DEBUGGED(A, B)      0
   82 #define CAM_DEBUG(A, B, C)
   83 #define CAM_DEBUG_PRINT(A, B)
   84 
   85 #endif /* CAMDEBUG && _KERNEL */
   86 
   87 #endif /* _CAM_CAM_DEBUG_H */

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