fs/cifs/cifs_debug.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *
   4  *   Copyright (c) International Business Machines  Corp., 2000,2002
   5  *   Modified by Steve French (sfrench@us.ibm.com)
   6  */
   7
   8 #ifndef _H_CIFS_DEBUG
   9 #define _H_CIFS_DEBUG
  10
  11 #ifdef pr_fmt
  12 #undef pr_fmt
  13 #endif
  14
  15 #define pr_fmt(fmt) "CIFS: " fmt
  16
  17 void cifs_dump_mem(char *label, void *data, int length);
  18 void cifs_dump_detail(void *buf, struct TCP_Server_Info *ptcp_info);
  19 void cifs_dump_mids(struct TCP_Server_Info *);
  20 extern bool traceSMB;           /* flag which enables the function below */
  21 void dump_smb(void *, int);
  22 #define CIFS_INFO       0x01
  23 #define CIFS_RC         0x02
  24 #define CIFS_TIMER      0x04
  25
  26 #define VFS 1
  27 #define FYI 2
  28 extern int cifsFYI;
  29 #ifdef CONFIG_CIFS_DEBUG2
  30 #define NOISY 4
  31 #else
  32 #define NOISY 0
  33 #endif
  34 #define ONCE 8
  35
  36 /*
  37  *      debug ON
  38  *      --------
  39  */
  40 #ifdef CONFIG_CIFS_DEBUG
  41
  42
  43 /*
  44  * When adding tracepoints and debug messages we have various choices.
  45  * Some considerations:
  46  *
  47  * Use cifs_dbg(VFS, ...) for things we always want logged, and the user to see
  48  *     cifs_info(...) slightly less important, admin can filter via loglevel > 6
  49  *     cifs_dbg(FYI, ...) minor debugging messages, off by default
  50  *     trace_smb3_*  ftrace functions are preferred for complex debug messages
  51  *                 intended for developers or experienced admins, off by default
  52  */
  53
  54 /* Information level messages, minor events */
  55 #define cifs_info_func(ratefunc, fmt, ...)                              \
  56         pr_info_ ## ratefunc(fmt, ##__VA_ARGS__)
  57
  58 #define cifs_info(fmt, ...)                                             \
  59         cifs_info_func(ratelimited, fmt, ##__VA_ARGS__)
  60
  61 /* information message: e.g., configuration, major event */
  62 #define cifs_dbg_func(ratefunc, type, fmt, ...)                         \
  63 do {                                                                    \
  64         if ((type) & FYI && cifsFYI & CIFS_INFO) {                      \
  65                 pr_debug_ ## ratefunc("%s: " fmt,                       \
  66                                       __FILE__, ##__VA_ARGS__);         \
  67         } else if ((type) & VFS) {                                      \
  68                 pr_err_ ## ratefunc("VFS: " fmt, ##__VA_ARGS__);        \
  69         } else if ((type) & NOISY && (NOISY != 0)) {                    \
  70                 pr_debug_ ## ratefunc(fmt, ##__VA_ARGS__);              \
  71         }                                                               \
  72 } while (0)
  73
  74 #define cifs_dbg(type, fmt, ...)                                        \
  75 do {                                                                    \
  76         if ((type) & ONCE)                                              \
  77                 cifs_dbg_func(once, type, fmt, ##__VA_ARGS__);          \
  78         else                                                            \
  79                 cifs_dbg_func(ratelimited, type, fmt, ##__VA_ARGS__);   \
  80 } while (0)
  81
  82 #define cifs_server_dbg_func(ratefunc, type, fmt, ...)                  \
  83 do {                                                                    \
  84         const char *sn = "";                                            \
  85         if (server && server->hostname)                                 \
  86                 sn = server->hostname;                                  \
  87         if ((type) & FYI && cifsFYI & CIFS_INFO) {                      \
  88                 pr_debug_ ## ratefunc("%s: \\\\%s " fmt,                \
  89                                       __FILE__, sn, ##__VA_ARGS__);     \
  90         } else if ((type) & VFS) {                                      \
  91                 pr_err_ ## ratefunc("VFS: \\\\%s " fmt,                 \
  92                                     sn, ##__VA_ARGS__);                 \
  93         } else if ((type) & NOISY && (NOISY != 0)) {                    \
  94                 pr_debug_ ## ratefunc("\\\\%s " fmt,                    \
  95                                       sn, ##__VA_ARGS__);               \
  96         }                                                               \
  97 } while (0)
  98
  99 #define cifs_server_dbg(type, fmt, ...)                                 \
 100 do {                                                                    \
 101         if ((type) & ONCE)                                              \
 102                 cifs_server_dbg_func(once, type, fmt, ##__VA_ARGS__);   \
 103         else                                                            \
 104                 cifs_server_dbg_func(ratelimited, type, fmt,            \
 105                                      ##__VA_ARGS__);                    \
 106 } while (0)
 107
 108 #define cifs_tcon_dbg_func(ratefunc, type, fmt, ...)                    \
 109 do {                                                                    \
 110         const char *tn = "";                                            \
 111         if (tcon && tcon->treeName)                                     \
 112                 tn = tcon->treeName;                                    \
 113         if ((type) & FYI && cifsFYI & CIFS_INFO) {                      \
 114                 pr_debug_ ## ratefunc("%s: %s " fmt,                    \
 115                                       __FILE__, tn, ##__VA_ARGS__);     \
 116         } else if ((type) & VFS) {                                      \
 117                 pr_err_ ## ratefunc("VFS: %s " fmt, tn, ##__VA_ARGS__); \
 118         } else if ((type) & NOISY && (NOISY != 0)) {                    \
 119                 pr_debug_ ## ratefunc("%s " fmt, tn, ##__VA_ARGS__);    \
 120         }                                                               \
 121 } while (0)
 122
 123 #define cifs_tcon_dbg(type, fmt, ...)                                   \
 124 do {                                                                    \
 125         if ((type) & ONCE)                                              \
 126                 cifs_tcon_dbg_func(once, type, fmt, ##__VA_ARGS__);     \
 127         else                                                            \
 128                 cifs_tcon_dbg_func(ratelimited, type, fmt,              \
 129                                    ##__VA_ARGS__);                      \
 130 } while (0)
 131
 132 /*
 133  *      debug OFF
 134  *      ---------
 135  */
 136 #else           /* _CIFS_DEBUG */
 137 #define cifs_dbg(type, fmt, ...)                                        \
 138 do {                                                                    \
 139         if (0)                                                          \
 140                 pr_debug(fmt, ##__VA_ARGS__);                           \
 141 } while (0)
 142
 143 #define cifs_server_dbg(type, fmt, ...)                                 \
 144 do {                                                                    \
 145         if (0)                                                          \
 146                 pr_debug("\\\\%s " fmt,                                 \
 147                          server->hostname, ##__VA_ARGS__);              \
 148 } while (0)
 149
 150 #define cifs_tcon_dbg(type, fmt, ...)                                   \
 151 do {                                                                    \
 152         if (0)                                                          \
 153                 pr_debug("%s " fmt, tcon->treeName, ##__VA_ARGS__);     \
 154 } while (0)
 155
 156 #define cifs_info(fmt, ...)                                             \
 157         pr_info(fmt, ##__VA_ARGS__)
 158 #endif
 159
 160 #endif                          /* _H_CIFS_DEBUG */