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Implement print_hex_dump(), print_hex_dump_bytes() and

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printk_ratelimited() in the LinuxKPI.

While at it fix the inclusion guard of printk.h to be similar to the
rest of the LinuxKPI header files.

MFC after:		1 week
Sponsored by:		Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2017-05-31 16:24:02 +00:00
parent 427cefde27
commit c2676069cb
1 changed files with 78 additions and 4 deletions
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82
sys/compat/linuxkpi/common/include/linux/printk.h
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@ -2,7 +2,7 @@
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
* Copyright (c) 2013-2017 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -28,8 +28,10 @@
*
* $FreeBSD$
*/
#ifndef _FBSD_PRINTK_H_
#define _FBSD_PRINTK_H_
#ifndef _LINUX_PRINTK_H_
#define _LINUX_PRINTK_H_
#include <linux/kernel.h>
/* GID printing macros */
#define GID_PRINT_FMT "%.4x:%.4x:%.4x:%.4x:%.4x:%.4x:%.4x:%.4x"
@ -38,4 +40,76 @@
htons(((u16 *)gid_raw)[4]), htons(((u16 *)gid_raw)[5]),\
htons(((u16 *)gid_raw)[6]), htons(((u16 *)gid_raw)[7])
#endif /* _FBSD_PRINTK_H */
enum {
DUMP_PREFIX_NONE,
DUMP_PREFIX_ADDRESS,
DUMP_PREFIX_OFFSET
};
static inline void
print_hex_dump(const char *level, const char *prefix_str,
const int prefix_type, const int rowsize, const int groupsize,
const void *buf, size_t len, const bool ascii)
{
typedef const struct { long long value; } __packed *print_64p_t;
typedef const struct { uint32_t value; } __packed *print_32p_t;
typedef const struct { uint16_t value; } __packed *print_16p_t;
const void *buf_old = buf;
int row;
while (len > 0) {
if (level != NULL)
printf("%s", level);
if (prefix_str != NULL)
printf("%s ", prefix_str);
switch (prefix_type) {
case DUMP_PREFIX_ADDRESS:
printf("[%p] ", buf);
break;
case DUMP_PREFIX_OFFSET:
printf("[%p] ", (const char *)((const char *)buf -
(const char *)buf_old));
break;
default:
break;
}
for (row = 0; row != rowsize; row++) {
if (groupsize == 8 && len > 7) {
printf("%016llx ", ((print_64p_t)buf)->value);
buf = (const uint8_t *)buf + 8;
len -= 8;
} else if (groupsize == 4 && len > 3) {
printf("%08x ", ((print_32p_t)buf)->value);
buf = (const uint8_t *)buf + 4;
len -= 4;
} else if (groupsize == 2 && len > 1) {
printf("%04x ", ((print_16p_t)buf)->value);
buf = (const uint8_t *)buf + 2;
len -= 2;
} else if (len > 0) {
printf("%02x ", *(const uint8_t *)buf);
buf = (const uint8_t *)buf + 1;
len--;
} else {
break;
}
}
printf("\n");
}
}
static inline void
print_hex_dump_bytes(const char *prefix_str, const int prefix_type,
const void *buf, size_t len)
{
print_hex_dump(NULL, prefix_str, prefix_type, 16, 1, buf, len, 0);
}
#define printk_ratelimited(...) do { \
static linux_ratelimit_t __ratelimited; \
if (linux_ratelimited(&__ratelimited)) \
printk(__VA_ARGS__); \
} while (0)
#endif /* _LINUX_PRINTK_H_ */