fs/cifs/cifs_debug.h

   1 /*
   2  *
   3  *   Copyright (c) International Business Machines  Corp., 2000,2002
   4  *   Modified by Steve French (sfrench@us.ibm.com)
   5  *
   6  *   This program is free software;  you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  14  *   the GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program;  if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20 */
  21
  22 #ifndef _H_CIFS_DEBUG
  23 #define _H_CIFS_DEBUG
  24
  25 void cifs_dump_mem(char *label, void *data, int length);
  26 void cifs_dump_detail(void *buf, struct TCP_Server_Info *ptcp_info);
  27 void cifs_dump_mids(struct TCP_Server_Info *);
  28 extern bool traceSMB;           /* flag which enables the function below */
  29 void dump_smb(void *, int);
  30 #define CIFS_INFO       0x01
  31 #define CIFS_RC         0x02
  32 #define CIFS_TIMER      0x04
  33
  34 #define VFS 1
  35 #define FYI 2
  36 extern int cifsFYI;
  37 #ifdef CONFIG_CIFS_DEBUG2
  38 #define NOISY 4
  39 #else
  40 #define NOISY 0
  41 #endif
  42 #define ONCE 8
  43
  44 /*
  45  *      debug ON
  46  *      --------
  47  */
  48 #ifdef CONFIG_CIFS_DEBUG
  49
  50
  51 /*
  52  * When adding tracepoints and debug messages we have various choices.
  53  * Some considerations:
  54  *
  55  * Use cifs_dbg(VFS, ...) for things we always want logged, and the user to see
  56  *     cifs_info(...) slightly less important, admin can filter via loglevel > 6
  57  *     cifs_dbg(FYI, ...) minor debugging messages, off by default
  58  *     trace_smb3_*  ftrace functions are preferred for complex debug messages
  59  *                 intended for developers or experienced admins, off by default
  60  */
  61
  62 /* Information level messages, minor events */
  63 #define cifs_info_func(ratefunc, fmt, ...)                      \
  64 do {                                                            \
  65         pr_info_ ## ratefunc("CIFS: " fmt, ##__VA_ARGS__);      \
  66 } while (0)
  67
  68 #define cifs_info(fmt, ...)                                     \
  69 do {                                                            \
  70         cifs_info_func(ratelimited, fmt, ##__VA_ARGS__);        \
  71 } while (0)
  72
  73 /* information message: e.g., configuration, major event */
  74 #define cifs_dbg_func(ratefunc, type, fmt, ...)                 \
  75 do {                                                            \
  76         if ((type) & FYI && cifsFYI & CIFS_INFO) {              \
  77                 pr_debug_ ## ratefunc("%s: "                    \
  78                                 fmt, __FILE__, ##__VA_ARGS__);  \
  79         } else if ((type) & VFS) {                              \
  80                 pr_err_ ## ratefunc("CIFS VFS: "                \
  81                                  fmt, ##__VA_ARGS__);           \
  82         } else if ((type) & NOISY && (NOISY != 0)) {            \
  83                 pr_debug_ ## ratefunc(fmt, ##__VA_ARGS__);      \
  84         }                                                       \
  85 } while (0)
  86
  87 #define cifs_dbg(type, fmt, ...) \
  88 do {                                                    \
  89         if ((type) & ONCE)                              \
  90                 cifs_dbg_func(once,                     \
  91                          type, fmt, ##__VA_ARGS__);     \
  92         else                                            \
  93                 cifs_dbg_func(ratelimited,              \
  94                         type, fmt, ##__VA_ARGS__);      \
  95 } while (0)
  96
  97 /*
  98  *      debug OFF
  99  *      ---------
 100  */
 101 #else           /* _CIFS_DEBUG */
 102 #define cifs_dbg(type, fmt, ...)                                        \
 103 do {                                                                    \
 104         if (0)                                                          \
 105                 pr_debug(fmt, ##__VA_ARGS__);                           \
 106 } while (0)
 107
 108 #define cifs_info(fmt, ...)                                             \
 109 do {                                                                    \
 110         pr_info("CIFS: "fmt, ##__VA_ARGS__);                            \
 111 } while (0)
 112 #endif
 113
 114 #endif                          /* _H_CIFS_DEBUG */