New DEBUG facility - new levels

https://fedorahosted.org/sssd/ticket/925

Added functions:
- debug_convert_old_level() to convert levels 0-9 to appropriate bitmask
  debug_convert_old_level(5) returns 0x03F0 (= 0 | 1 | 2 | 3 | 4 | 5)

- debug_get_level() to convert old level number to its new value
  debug_get_level(5) returns 0x0200 (= 5)

There are several new macros in util/util.h:

- SSSDBG_* to reflect a debug level (same names as in the ticket) - please,
  don't use magic numbers anymore

2 files changed, 89 insertions, 2 deletions

diff --git a/src/util/debug.c b/src/util/debug.c
index 89b6217e7..cca92eb93 100644
--- a/src/util/debug.c
+++ b/src/util/debug.c
@@ -58,6 +58,49 @@ errno_t set_debug_file_from_fd(const int fd)
     return EOK;
 }
 
+int debug_convert_old_level(int old_level)
+{
+    if ((old_level != 0) && !(old_level & 0x000F))
+        return old_level;
+
+    if( old_level == SSS_UNRESOLVED_DEBUG_LEVEL )
+        return SSSDBG_UNRESOLVED;
+
+    int new_level = SSSDBG_FATAL_FAILURE;
+
+    if (old_level == 0)
+        return new_level;
+
+    if (old_level >= 1)
+        new_level |= SSSDBG_CRIT_FAILURE;
+
+    if (old_level >= 2)
+        new_level |= SSSDBG_OP_FAILURE;
+
+    if (old_level >= 3)
+        new_level |= SSSDBG_MINOR_FAILURE;
+
+    if (old_level >= 4)
+        new_level |= SSSDBG_CONF_SETTINGS;
+
+    if (old_level >= 5)
+        new_level |= SSSDBG_FUNC_DATA;
+
+    if (old_level >= 6)
+        new_level |= SSSDBG_TRACE_FUNC;
+
+    if (old_level >= 7)
+        new_level |= SSSDBG_TRACE_LIBS;
+
+    if (old_level >= 8)
+        new_level |= SSSDBG_TRACE_INTERNAL;
+
+    if (old_level >= 9)
+        new_level |= SSSDBG_TRACE_ALL;
+
+    return new_level;
+}
+
 void debug_fn(const char *format, ...)
 {
     va_list ap;
@@ -70,6 +113,33 @@ void debug_fn(const char *format, ...)
     va_end(ap);
 }
 
+int debug_get_level(int old_level)
+{
+    if ((old_level != 0) && !(old_level & 0x000F))
+        return old_level;
+
+    if( old_level == SSS_UNRESOLVED_DEBUG_LEVEL )
+        return SSSDBG_UNRESOLVED;
+
+    if ((old_level > 9) || (old_level < 0))
+        return SSSDBG_FATAL_FAILURE;
+
+    int levels[] = {
+        SSSDBG_FATAL_FAILURE,   /* 0 */
+        SSSDBG_CRIT_FAILURE,
+        SSSDBG_OP_FAILURE,
+        SSSDBG_MINOR_FAILURE,
+        SSSDBG_CONF_SETTINGS,
+        SSSDBG_FUNC_DATA,
+        SSSDBG_TRACE_FUNC,
+        SSSDBG_TRACE_LIBS,
+        SSSDBG_TRACE_INTERNAL,
+        SSSDBG_TRACE_ALL        /* 9 */
+    };
+
+    return levels[old_level];
+}
+
 void ldb_debug_messages(void *context, enum ldb_debug_level level,
                         const char *fmt, va_list ap)
 {
diff --git a/src/util/util.h b/src/util/util.h
index 3ff5f6292..acaaf4da3 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -57,10 +57,27 @@ extern int debug_timestamps;
 extern int debug_to_file;
 extern const char *debug_log_file;
 void debug_fn(const char *format, ...);
+int debug_get_level(int old_level);
+int debug_convert_old_level(int old_level);
 errno_t set_debug_file_from_fd(const int fd);
 
-#define SSS_DEFAULT_DEBUG_LEVEL 0
-#define SSS_UNRESOLVED_DEBUG_LEVEL -1
+#define SSS_DEFAULT_DEBUG_LEVEL SSSDBG_DEFAULT
+#define SSS_UNRESOLVED_DEBUG_LEVEL SSSDBG_UNRESOLVED
+
+#define SSSDBG_FATAL_FAILURE  0x0010   /* level 0 */
+#define SSSDBG_CRIT_FAILURE   0x0020   /* level 1 */
+#define SSSDBG_OP_FAILURE     0x0040   /* level 2 */
+#define SSSDBG_MINOR_FAILURE  0x0080   /* level 3 */
+#define SSSDBG_CONF_SETTINGS  0x0100   /* level 4 */
+#define SSSDBG_FUNC_DATA      0x0200   /* level 5 */
+#define SSSDBG_TRACE_FUNC     0x0400   /* level 6 */
+#define SSSDBG_TRACE_LIBS     0x1000   /* level 7 */
+#define SSSDBG_TRACE_INTERNAL 0x2000   /* level 8 */
+#define SSSDBG_TRACE_ALL      0x4000   /* level 9 */
+
+#define SSSDBG_UNRESOLVED     -1
+#define SSSDBG_MASK_ALL       0xFFF0   /* enable all debug levels */
+#define SSSDBG_DEFAULT        SSSDBG_FATAL_FAILURE
 
 #define SSSDBG_TIMESTAMP_UNRESOLVED   -1
 #define SSSDBG_TIMESTAMP_DEFAULT       1