From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Ricardo Leitner Subject: [PATCH v2] Introduce nft_log_dereference() macro Date: Wed, 29 Oct 2014 10:04:51 -0200 Message-ID: To: netfilter-devel@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:40867 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932479AbaJ2MFF (ORCPT ); Wed, 29 Oct 2014 08:05:05 -0400 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s9TC55u7018347 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Wed, 29 Oct 2014 08:05:05 -0400 Received: from localhost.localdomain.com (vpn1-7-3.gru2.redhat.com [10.97.7.3]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s9TC54SQ026188 for ; Wed, 29 Oct 2014 08:05:04 -0400 Sender: netfilter-devel-owner@vger.kernel.org List-ID: Wrap up a common call pattern in an easier to handle call. Signed-off-by: Marcelo Ricardo Leitner --- Notes: Removed from patchset because now they aren't really related. net/netfilter/nf_log.c | 21 +++++++++------------ 1 file changed, 9 insertions(+), 12 deletions(-) diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c index d7197649dba689bae96edb10848e8c1c3d4a63f6..5eaf047ed37facad0df59e70428c08ef8717a70d 100644 --- a/net/netfilter/nf_log.c +++ b/net/netfilter/nf_log.c @@ -19,6 +19,9 @@ static struct nf_logger __rcu *loggers[NFPROTO_NUMPROTO][NF_LOG_TYPE_MAX] __read_mostly; static DEFINE_MUTEX(nf_log_mutex); +#define nft_log_dereference(logger) \ + rcu_dereference_protected(logger, lockdep_is_held(&nf_log_mutex)) + static struct nf_logger *__find_logger(int pf, const char *str_logger) { struct nf_logger *log; @@ -28,8 +31,7 @@ static struct nf_logger *__find_logger(int pf, const char *str_logger) if (loggers[pf][i] == NULL) continue; - log = rcu_dereference_protected(loggers[pf][i], - lockdep_is_held(&nf_log_mutex)); + log = nft_log_dereference(loggers[pf][i]); if (!strncasecmp(str_logger, log->name, strlen(log->name))) return log; } @@ -45,8 +47,7 @@ void nf_log_set(struct net *net, u_int8_t pf, const struct nf_logger *logger) return; mutex_lock(&nf_log_mutex); - log = rcu_dereference_protected(net->nf.nf_loggers[pf], - lockdep_is_held(&nf_log_mutex)); + log = nft_log_dereference(net->nf.nf_loggers[pf]); if (log == NULL) rcu_assign_pointer(net->nf.nf_loggers[pf], logger); @@ -61,8 +62,7 @@ void nf_log_unset(struct net *net, const struct nf_logger *logger) mutex_lock(&nf_log_mutex); for (i = 0; i < NFPROTO_NUMPROTO; i++) { - log = rcu_dereference_protected(net->nf.nf_loggers[i], - lockdep_is_held(&nf_log_mutex)); + log = nft_log_dereference(net->nf.nf_loggers[i]); if (log == logger) RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL); } @@ -297,8 +297,7 @@ static int seq_show(struct seq_file *s, void *v) int i, ret; struct net *net = seq_file_net(s); - logger = rcu_dereference_protected(net->nf.nf_loggers[*pos], - lockdep_is_held(&nf_log_mutex)); + logger = nft_log_dereference(net->nf.nf_loggers[*pos]); if (!logger) ret = seq_printf(s, "%2lld NONE (", *pos); @@ -312,8 +311,7 @@ static int seq_show(struct seq_file *s, void *v) if (loggers[*pos][i] == NULL) continue; - logger = rcu_dereference_protected(loggers[*pos][i], - lockdep_is_held(&nf_log_mutex)); + logger = nft_log_dereference(loggers[*pos][i]); ret = seq_printf(s, "%s", logger->name); if (ret < 0) return ret; @@ -385,8 +383,7 @@ static int nf_log_proc_dostring(struct ctl_table *table, int write, mutex_unlock(&nf_log_mutex); } else { mutex_lock(&nf_log_mutex); - logger = rcu_dereference_protected(net->nf.nf_loggers[tindex], - lockdep_is_held(&nf_log_mutex)); + logger = nft_log_dereference(net->nf.nf_loggers[tindex]); if (!logger) table->data = "NONE"; else -- 1.9.3