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| author | Marcelo Leitner <mleitner@redhat.com> | 2014-10-29 10:04:51 -0200 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-10-27 22:13:37 -0400 |
| commit | 2f6e55943522ae92ea551df7bb31369c304ef0a6 (patch) | |
| tree | d5f8df6fc813b78b59c4759eea81993f772b76f6 /net | |
| parent | 98a383953f66e1c4f138385a70131b8b12a0cea7 (diff) | |
| download | lwn-2f6e55943522ae92ea551df7bb31369c304ef0a6.tar.gz lwn-2f6e55943522ae92ea551df7bb31369c304ef0a6.zip | |
netfilter: nf_log: Introduce nft_log_dereference() macro
[ Upstream commit 0c26ed1c07f13ca27e2638ffdd1951013ed96c48 ]
Wrap up a common call pattern in an easier to handle call.
Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_log.c | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c index b7d491ec5317..9f5d1d523830 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); } @@ -298,8 +298,7 @@ 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); @@ -313,8 +312,7 @@ 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; @@ -386,8 +384,7 @@ 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 |