printk.h

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    1 /*-
    2  * Copyright (c) 2010 Isilon Systems, Inc.
    3  * Copyright (c) 2010 iX Systems, Inc.
    4  * Copyright (c) 2010 Panasas, Inc.
    5  * Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice unmodified, this list of conditions, and the following
   13  *    disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  *
   29  * $FreeBSD$
   30  */
   31 #ifndef _LINUXKPI_LINUX_PRINTK_H_
   32 #define _LINUXKPI_LINUX_PRINTK_H_
   33 
   34 #include <linux/kernel.h>
   35 
   36 /* GID printing macros */
   37 #define GID_PRINT_FMT                   "%.4x:%.4x:%.4x:%.4x:%.4x:%.4x:%.4x:%.4x"
   38 #define GID_PRINT_ARGS(gid_raw)         htons(((u16 *)gid_raw)[0]), htons(((u16 *)gid_raw)[1]),\
   39                                         htons(((u16 *)gid_raw)[2]), htons(((u16 *)gid_raw)[3]),\
   40                                         htons(((u16 *)gid_raw)[4]), htons(((u16 *)gid_raw)[5]),\
   41                                         htons(((u16 *)gid_raw)[6]), htons(((u16 *)gid_raw)[7])
   42 
   43 enum {
   44         DUMP_PREFIX_NONE,
   45         DUMP_PREFIX_ADDRESS,
   46         DUMP_PREFIX_OFFSET
   47 };
   48 
   49 static inline void
   50 print_hex_dump(const char *level, const char *prefix_str,
   51     const int prefix_type, const int rowsize, const int groupsize,
   52     const void *buf, size_t len, const bool ascii)
   53 {
   54         typedef const struct { long long value; } __packed *print_64p_t;
   55         typedef const struct { uint32_t value; } __packed *print_32p_t;
   56         typedef const struct { uint16_t value; } __packed *print_16p_t;
   57         const void *buf_old = buf;
   58         int row;
   59 
   60         while (len > 0) {
   61                 if (level != NULL)
   62                         printf("%s", level);
   63                 if (prefix_str != NULL)
   64                         printf("%s ", prefix_str);
   65 
   66                 switch (prefix_type) {
   67                 case DUMP_PREFIX_ADDRESS:
   68                         printf("[%p] ", buf);
   69                         break;
   70                 case DUMP_PREFIX_OFFSET:
   71                         printf("[%#tx] ", ((const char *)buf -
   72                             (const char *)buf_old));
   73                         break;
   74                 default:
   75                         break;
   76                 }
   77                 for (row = 0; row != rowsize; row++) {
   78                         if (groupsize == 8 && len > 7) {
   79                                 printf("%016llx ", ((print_64p_t)buf)->value);
   80                                 buf = (const uint8_t *)buf + 8;
   81                                 len -= 8;
   82                         } else if (groupsize == 4 && len > 3) {
   83                                 printf("%08x ", ((print_32p_t)buf)->value);
   84                                 buf = (const uint8_t *)buf + 4;
   85                                 len -= 4;
   86                         } else if (groupsize == 2 && len > 1) {
   87                                 printf("%04x ", ((print_16p_t)buf)->value);
   88                                 buf = (const uint8_t *)buf + 2;
   89                                 len -= 2;
   90                         } else if (len > 0) {
   91                                 printf("%02x ", *(const uint8_t *)buf);
   92                                 buf = (const uint8_t *)buf + 1;
   93                                 len--;
   94                         } else {
   95                                 break;
   96                         }
   97                 }
   98                 printf("\n");
   99         }
  100 }
  101 
  102 static inline void
  103 print_hex_dump_bytes(const char *prefix_str, const int prefix_type,
  104     const void *buf, size_t len)
  105 {
  106         print_hex_dump(NULL, prefix_str, prefix_type, 16, 1, buf, len, 0);
  107 }
  108 
  109 #define printk_ratelimit() ({                   \
  110         static linux_ratelimit_t __ratelimited; \
  111         linux_ratelimited(&__ratelimited);      \
  112 })
  113 
  114 #define printk_ratelimited(...) ({              \
  115         bool __retval = printk_ratelimit();     \
  116         if (__retval)                           \
  117                 printk(__VA_ARGS__);            \
  118         __retval;                               \
  119 })
  120 
  121 #define pr_err_ratelimited(fmt, ...) \
  122         printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
  123 
  124 #define print_hex_dump_debug(...) \
  125         print_hex_dump(KERN_DEBUG, ##__VA_ARGS__)
  126 
  127 #define pr_info_ratelimited(fmt, ...) \
  128         printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
  129 
  130 #endif                                  /* _LINUXKPI_LINUX_PRINTK_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/compat/linuxkpi/common/include/linux/printk.h

FreeBSD/Linux Kernel Cross Reference
sys/compat/linuxkpi/common/include/linux/printk.h