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authorVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>2012-12-06 01:48:27 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-18 00:19:09 +0400
commit7a555613eb77c69eb6e48b61bc5f72dd42fa1780 (patch)
treefd2c5ef59a77ba532a5957923f9919fa170027f9 /include
parentf657fd21e16e3ab7432c03008e19069c2ef8e150 (diff)
downloadlinux-7a555613eb77c69eb6e48b61bc5f72dd42fa1780.tar.xz
dynamic_debug: dynamic hex dump
Introduce print_hex_dump_debug() that can be dynamically controlled, similar to pr_debug. Also, make print_hex_dump_bytes() dynamically controlled Implement only 'p' flag (_DPRINTK_FLAGS_PRINT) to keep it simple since hex dump prints multiple lines and long prefix would impact readability. To provide line/file etc. information, use pr_debug or similar before/after print_hex_dump_debug() Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com> Signed-off-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/dynamic_debug.h11
-rw-r--r--include/linux/printk.h17
2 files changed, 28 insertions, 0 deletions
diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index 6dd4787a798a..2fe93b26b42f 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -95,6 +95,17 @@ do { \
##__VA_ARGS__); \
} while (0)
+#define dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii) \
+do { \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, \
+ __builtin_constant_p(prefix_str) ? prefix_str : "hexdump");\
+ if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \
+ print_hex_dump(KERN_DEBUG, prefix_str, \
+ prefix_type, rowsize, groupsize, \
+ buf, len, ascii); \
+} while (0)
+
#else
#include <linux/string.h>
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 9afc01e5a0a6..02c95cf872cd 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -321,8 +321,13 @@ extern void hex_dump_to_buffer(const void *buf, size_t len,
extern void print_hex_dump(const char *level, const char *prefix_str,
int prefix_type, int rowsize, int groupsize,
const void *buf, size_t len, bool ascii);
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#define print_hex_dump_bytes(prefix_str, prefix_type, buf, len) \
+ dynamic_hex_dump(prefix_str, prefix_type, 16, 1, buf, len, true)
+#else
extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len);
+#endif /* defined(CONFIG_DYNAMIC_DEBUG) */
#else
static inline void print_hex_dump(const char *level, const char *prefix_str,
int prefix_type, int rowsize, int groupsize,
@@ -336,4 +341,16 @@ static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
#endif
+#if defined(CONFIG_DYNAMIC_DEBUG)
+#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii) \
+ dynamic_hex_dump(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii)
+#else
+#define print_hex_dump_debug(prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii) \
+ print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, rowsize, \
+ groupsize, buf, len, ascii)
+#endif /* defined(CONFIG_DYNAMIC_DEBUG) */
+
#endif