*** Bug 577663 has been marked as a duplicate of this bug. ***

Should really be a combination of dynamic logging levels, plus 'zones' for various pieces of the puzzle like wifi, policy, wired, gsm, serial, ppp, hal, ip, etc.  Thus you could dial up debugging output for only the zones you care about.

I can give it a try. What exactly do you want? Do you want zones to go across all log levels (info, warn, err, etc.), or just debugging? I would instinctively go for latter, but former might make sense as well.

I'd say zones (or ") should go across everything.  I'd imagine something like this:

/* INFO: prints general messages, errors, and warnings */
#define NM_LOG_INFO 0
/* VERBOSE: prints stuff like device state changes, IP & DHCP config, etc */
#define NM_LOG_VERBOSE 1
/* DEBUG: prints stuff like supplicant state changes, DHCP transaction information, etc */
#define NM_LOG_DEBUG 2

Then we have the zones:

typedef enum {
	NM_LOG_ZONE_GENERAL = 0x0000,
	NM_LOG_ZONE_WIFI    = 0x0001,
	NM_LOG_ZONE_WIRED   = 0x0002,
	NM_LOG_ZONE_SERIAL  = 0x0004,
	NM_LOG_ZONE_GSM     = 0x0008,
	NM_LOG_ZONE_CDMA    = 0x0010,
	NM_LOG_ZONE_DHCP    = 0x0020,
	NM_LOG_ZONE_DEVICE  = 0x0040,
	NM_LOG_ZONE_HOTPLUG = 0x0080,
	NM_LOG_ZONE_VPN     = 0x0100,
	NM_LOG_ZONE_SHARING = 0x0200,
	NM_LOG_ZONE_IP4     = 0x0400,
	NM_LOG_ZONE_IP6     = 0x0800,
	NM_LOG_ZONE_AUTOIP4 = 0x1000,
	NM_LOG_TIMESTAMPS   = 0x2000,
} NMLogZone;

and add more as we think about it.  Then, for the actual logging functions, we make a private header somewhere in src/ called nm-debug.h or something that basically does:

#define nm_log_general (level, format, args...) \
    { nm_log (NM_LOG_ZONE_GENERAL, level, format, ##args); }

#define nm_log_wifi (level, format, args...) \
    { nm_log (NM_LOG_ZONE_WIFI, level, format, ##args); }

that sort of thing.  We then implement nm_log() in src/NetworkManagerUtils.c that actually puts together the log string and prints it out.  Sound doable?  If you could even just put together the logging infrastructure we could certainly move stuff over inside NM as time permits.  Just haven't had the time to do that quite yet.  That would rock.

Actually there's already src/nm-logging.c and src/nm-logging.h, we could just add this stuff to those existing files.

This issue apparently has been identified as worth fixing. I'm thus setting to NEW.

Granular logging added as of commit 157e9f791dcd01a53188ccec2ab8d552b5a03686.