ubifs-utils: Add implementations for linux kernel printing functions

Add implementations for linux kernel printing functions, because these
functions(eg. pr_debug, pr_err, etc.) are widely used in UBIFS linux
kernel libs. No need to define multiple levels in dbg_msg for debuging,
just replace dbg_msg with pr_debug. Now, there are five levels of
printing messages:
 0 - none
 1 - error message
 2 - warning message [default]
 3 - notice message
 4 - debug message

This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 46 insertions, 2 deletions

diff --git a/ubifs-utils/common/defs.h b/ubifs-utils/common/defs.h
index 485c50c..6d99a2f 100644
--- a/ubifs-utils/common/defs.h
+++ b/ubifs-utils/common/defs.h
@@ -8,8 +8,10 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <limits.h>
 #include <errno.h>
+#include <execinfo.h>
 
 #include "ubifs.h"
 
@@ -22,10 +24,52 @@ extern struct ubifs_info info_;
 
 enum { MKFS_PROGRAM_TYPE = 0 };
 
-#define dbg_msg(lvl, fmt, ...) do {if (info_.debug_level >= lvl)	\
-	printf("%s: %s: " fmt "\n", PROGRAM_NAME, __FUNCTION__, ##__VA_ARGS__); \
+enum { ERR_LEVEL = 1, WARN_LEVEL, INFO_LEVEL, DEBUG_LEVEL };
+
+#define pr_debug(fmt, ...) do { if (info_.debug_level >= DEBUG_LEVEL)	\
+	printf("<DEBUG> %s[%d] (%s): %s: " fmt, PROGRAM_NAME, getpid(),	\
+	       info_.dev_name, __FUNCTION__, ##__VA_ARGS__);		\
+} while(0)
+
+#define pr_notice(fmt, ...) do { if (info_.debug_level >= INFO_LEVEL)	\
+	printf("<INFO> %s[%d] (%s): %s: " fmt, PROGRAM_NAME, getpid(),	\
+	       info_.dev_name, __FUNCTION__, ##__VA_ARGS__);		\
+} while(0)
+
+#define pr_warn(fmt, ...) do { if (info_.debug_level >= WARN_LEVEL)	\
+	printf("<WARN> %s[%d] (%s): %s: " fmt, PROGRAM_NAME, getpid(),	\
+	       info_.dev_name, __FUNCTION__, ##__VA_ARGS__);		\
+} while(0)
+
+#define pr_err(fmt, ...) do { if (info_.debug_level >= ERR_LEVEL)	\
+	printf("<ERROR> %s[%d] (%s): %s: " fmt, PROGRAM_NAME, getpid(),	\
+	       info_.dev_name, __FUNCTION__, ##__VA_ARGS__);		\
 } while(0)
 
+#define pr_cont(fmt, ...) do { if (info_.debug_level >= ERR_LEVEL)	\
+	printf(fmt, ##__VA_ARGS__);					\
+} while(0)
+
+static inline void dump_stack(void)
+{
+#define STACK_SIZE 512
+	int j, nptrs;
+	void *buffer[STACK_SIZE];
+	char **strings;
+
+	if (info_.debug_level < ERR_LEVEL)
+		return;
+
+	nptrs = backtrace(buffer, STACK_SIZE);
+	strings = backtrace_symbols(buffer, nptrs);
+
+	printf("dump_stack:\n");
+	for (j = 0; j < nptrs; j++)
+		printf("%s\n", strings[j]);
+
+	free(strings);
+}
+
 #define unlikely(x) (x)
 
 #define do_div(n,base) ({ \