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Jason Baron 346e15beb5 driver core: basic infrastructure for per-module dynamic debug messages 
Base infrastructure to enable per-module debug messages.

I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes
control of debugging statements on a per-module basis in one /proc file,
currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG,
is not set, debugging statements can still be enabled as before, often by
defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no
affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set.

The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That
is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls
can be dynamically enabled/disabled on a per-module basis.

Future plans include extending this functionality to subsystems, that define 
their own debug levels and flags.

Usage:

Dynamic debugging is controlled by the debugfs file, 
<debugfs>/dynamic_printk/modules. This file contains a list of the modules that
can be enabled. The format of the file is as follows:

	<module_name> <enabled=0/1>
		.
		.
		.

	<module_name> : Name of the module in which the debug call resides
	<enabled=0/1> : whether the messages are enabled or not

For example:

	snd_hda_intel enabled=0
	fixup enabled=1
	driver enabled=0

Enable a module:

	$echo "set enabled=1 <module_name>" > dynamic_printk/modules

Disable a module:

	$echo "set enabled=0 <module_name>" > dynamic_printk/modules

Enable all modules:

	$echo "set enabled=1 all" > dynamic_printk/modules

Disable all modules:

	$echo "set enabled=0 all" > dynamic_printk/modules

Finally, passing "dynamic_printk" at the command line enables
debugging for all modules. This mode can be turned off via the above
disable command.

[gkh: minor cleanups and tweaks to make the build work quietly]

Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-10-16 09:24:47 -07:00
..
ipvs ipvs: Add proper dependencies on IP_VS, and fix description header line. 2008-10-11 12:18:04 -07:00
core.c netfilter: enable netfilter in netns 2008-10-08 11:35:11 +02:00
Kconfig Merge branch 'lvs-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/lvs-2.6 2008-10-08 14:26:36 -07:00
Makefile Merge branch 'lvs-next-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/lvs-2.6 2008-10-08 14:26:36 -07:00
nf_conntrack_acct.c netfilter: netns nf_conntrack: per-netns conntrack accounting 2008-10-08 11:35:09 +02:00
nf_conntrack_amanda.c
nf_conntrack_core.c netfilter: netns nf_conntrack: final netns tweaks 2008-10-08 11:35:09 +02:00
nf_conntrack_ecache.c netfilter: netns nf_conntrack: per-netns event cache 2008-10-08 11:35:07 +02:00
nf_conntrack_expect.c netfilter: netns nf_conntrack: final netns tweaks 2008-10-08 11:35:09 +02:00
nf_conntrack_extend.c netfilter: nf_conntrack_extend: avoid unnecessary "ct->ext" dereferences 2008-07-26 17:50:05 -07:00
nf_conntrack_ftp.c netfilter: netns nf_conntrack: pass conntrack to nf_conntrack_event_cache() not skb 2008-10-08 11:35:07 +02:00
nf_conntrack_h323_asn1.c
nf_conntrack_h323_main.c netfilter: netns nf_conntrack: H323 conntracking in netns 2008-10-08 11:35:09 +02:00
nf_conntrack_h323_types.c
nf_conntrack_helper.c netfilter: netns nf_conntrack: unregister helper in every netns 2008-10-08 11:35:06 +02:00
nf_conntrack_irc.c netfilter: nf_conntrack_irc: make sure string is terminated before calling simple_strtoul 2008-09-07 18:21:24 -07:00
nf_conntrack_l3proto_generic.c
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: netns nf_conntrack: per-netns expectations 2008-10-08 11:35:03 +02:00
nf_conntrack_pptp.c driver core: basic infrastructure for per-module dynamic debug messages 2008-10-16 09:24:47 -07:00
nf_conntrack_proto_dccp.c netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_log_invalid sysctl 2008-10-08 11:35:08 +02:00
nf_conntrack_proto_generic.c netfilter: Use unsigned types for hooknum and pf vars 2008-10-08 11:35:00 +02:00
nf_conntrack_proto_gre.c netfilter: netns nf_conntrack: GRE conntracking in netns 2008-10-08 11:35:10 +02:00
nf_conntrack_proto_sctp.c netfilter: netns nf_conntrack: pass conntrack to nf_conntrack_event_cache() not skb 2008-10-08 11:35:07 +02:00
nf_conntrack_proto_tcp.c netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_log_invalid sysctl 2008-10-08 11:35:08 +02:00
nf_conntrack_proto_udp.c netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_log_invalid sysctl 2008-10-08 11:35:08 +02:00
nf_conntrack_proto_udplite.c netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_log_invalid sysctl 2008-10-08 11:35:08 +02:00
nf_conntrack_proto.c netfilter: netns nf_conntrack: cleanup after L3 and L4 proto unregister in every netns 2008-10-08 11:35:07 +02:00
nf_conntrack_sane.c
nf_conntrack_sip.c netfilter: netns nf_conntrack: SIP conntracking in netns 2008-10-08 11:35:09 +02:00
nf_conntrack_standalone.c netfilter: netns nf_conntrack: per-netns net.netfilter.nf_conntrack_log_invalid sysctl 2008-10-08 11:35:08 +02:00
nf_conntrack_tftp.c
nf_internals.h netfilter: Use unsigned types for hooknum and pf vars 2008-10-08 11:35:00 +02:00
nf_log.c netfilter: Introduce NFPROTO_* constants 2008-10-08 11:35:00 +02:00
nf_queue.c netfilter: Introduce NFPROTO_* constants 2008-10-08 11:35:00 +02:00
nf_sockopt.c netfilter: enable netfilter in netns 2008-10-08 11:35:11 +02:00
nf_tproxy_core.c netfilter: remove unused #include <version.h> 2008-10-12 21:08:34 -07:00
nfnetlink_log.c netfilter: Use unsigned types for hooknum and pf vars 2008-10-08 11:35:00 +02:00
nfnetlink_queue.c netns: Use net_eq() to compare net-namespaces for optimization. 2008-07-19 22:34:43 -07:00
nfnetlink.c
x_tables.c netfilter: xtables: provide invoked family value to extensions 2008-10-08 11:35:20 +02:00
xt_CLASSIFY.c netfilter: xtables: move extension arguments into compound structure (4/6) 2008-10-08 11:35:19 +02:00
xt_comment.c netfilter: xtables: use NFPROTO_UNSPEC in more extensions 2008-10-08 11:35:20 +02:00
xt_connbytes.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_connlimit.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_connmark.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_CONNMARK.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_CONNSECMARK.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_conntrack.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_dccp.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_dscp.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_DSCP.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
xt_esp.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_hashlimit.c netfilter: xtables: move extension arguments into compound structure (3/6) 2008-10-08 11:35:19 +02:00
xt_helper.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_iprange.c netfilter: xtables: move extension arguments into compound structure (1/6) 2008-10-08 11:35:18 +02:00
xt_length.c netfilter: xtables: move extension arguments into compound structure (1/6) 2008-10-08 11:35:18 +02:00
xt_limit.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_mac.c netfilter: xtables: use NFPROTO_UNSPEC in more extensions 2008-10-08 11:35:20 +02:00
xt_mark.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_MARK.c netfilter: xtables: use NFPROTO_UNSPEC in more extensions 2008-10-08 11:35:20 +02:00
xt_multiport.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_NFLOG.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_NFQUEUE.c netfilter: xtables: move extension arguments into compound structure (4/6) 2008-10-08 11:35:19 +02:00
xt_NOTRACK.c netfilter: xtables: use NFPROTO_UNSPEC in more extensions 2008-10-08 11:35:20 +02:00
xt_owner.c netfilter: xtables: use NFPROTO_UNSPEC in more extensions 2008-10-08 11:35:20 +02:00
xt_physdev.c netfilter: xtables: use NFPROTO_UNSPEC in more extensions 2008-10-08 11:35:20 +02:00
xt_pkttype.c netfilter: xtables: cut down on static data for family-independent extensions 2008-10-08 11:35:20 +02:00
xt_policy.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_quota.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_rateest.c netfilter: xtables: move extension arguments into compound structure (3/6) 2008-10-08 11:35:19 +02:00
xt_RATEEST.c netfilter: xtables: move extension arguments into compound structure (6/6) 2008-10-08 11:35:19 +02:00
xt_realm.c netfilter: xtables: use NFPROTO_UNSPEC in more extensions 2008-10-08 11:35:20 +02:00
xt_recent.c netfilter: xtables: move extension arguments into compound structure (3/6) 2008-10-08 11:35:19 +02:00
xt_sctp.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_SECMARK.c netfilter: xtables: move extension arguments into compound structure (6/6) 2008-10-08 11:35:19 +02:00
xt_socket.c netfilter: xtables: move extension arguments into compound structure (1/6) 2008-10-08 11:35:18 +02:00
xt_state.c netfilter: xtables: move extension arguments into compound structure (3/6) 2008-10-08 11:35:19 +02:00
xt_statistic.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_string.c netfilter: xtables: move extension arguments into compound structure (3/6) 2008-10-08 11:35:19 +02:00
xt_tcpmss.c netfilter: xtables: move extension arguments into compound structure (1/6) 2008-10-08 11:35:18 +02:00
xt_TCPMSS.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
xt_TCPOPTSTRIP.c netfilter: xtables: move extension arguments into compound structure (4/6) 2008-10-08 11:35:19 +02:00
xt_tcpudp.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_time.c netfilter: xtables: move extension arguments into compound structure (2/6) 2008-10-08 11:35:18 +02:00
xt_TPROXY.c netfilter: xtables: move extension arguments into compound structure (5/6) 2008-10-08 11:35:19 +02:00
xt_TRACE.c netfilter: xtables: move extension arguments into compound structure (4/6) 2008-10-08 11:35:19 +02:00
xt_u32.c netfilter: xtables: move extension arguments into compound structure (1/6) 2008-10-08 11:35:18 +02:00