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netfilter: use a linked list of loggers

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This patch modifies nf_log to use a linked list of loggers for each
protocol. This list of loggers is read and write protected with a
mutex.

This patch separates registration and binding. To be used as
logging module, a module has to register calling nf_log_register()
and to bind to a protocol it has to call nf_log_bind_pf().
This patch also converts the logging modules to the new API. For nfnetlink_log,
it simply switchs call to register functions to call to bind function and
adds a call to nf_log_register() during init. For other modules, it just
remove a const flag from the logger structure and replace it with a
__read_mostly.

Signed-off-by: Eric Leblond <eric@inl.fr>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Eric Leblond
2009-03-16 14:54:21 +01:00
committed by Patrick McHardy
parent 28337ff543
commit ca735b3aaa
6 changed files with 85 additions and 42 deletions
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include/net/netfilter/nf_log.h
+8 -3
View File
@@ -1,6 +1,8 @@
#ifndef _NF_LOG_H
#define _NF_LOG_H
#include <linux/netfilter.h>
/* those NF_LOG_* defines and struct nf_loginfo are legacy definitios that will
* disappear once iptables is replaced with pkttables. Please DO NOT use them
* for any new code! */
@@ -40,12 +42,15 @@ struct nf_logger {
struct module *me;
nf_logfn *logfn;
char *name;
struct list_head list[NFPROTO_NUMPROTO];
};
/* Function to register/unregister log function. */
int nf_log_register(u_int8_t pf, const struct nf_logger *logger);
void nf_log_unregister(const struct nf_logger *logger);
void nf_log_unregister_pf(u_int8_t pf);
int nf_log_register(u_int8_t pf, struct nf_logger *logger);
void nf_log_unregister(struct nf_logger *logger);
int nf_log_bind_pf(u_int8_t pf, const struct nf_logger *logger);
void nf_log_unbind_pf(u_int8_t pf);
/* Calls the registered backend logging function */
void nf_log_packet(u_int8_t pf,