netdev - [PATCH v3 2/6] genetlink: Add lockdep_genl_is

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat,  3 Dec 2011 10:38:47 -0800
From:	Jesse Gross <jesse@...ira.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, dev@...nvswitch.org,
	Pravin B Shelar <pshelar@...ira.com>
Subject: [PATCH v3 2/6] genetlink: Add lockdep_genl_is_held().

From: Pravin B Shelar <pshelar@...ira.com>

Open vSwitch uses genl_mutex locking to protect datapath
data-structures like flow-table, flow-actions. Following patch adds
lockdep_genl_is_held() which is used for rcu annotation to prove
locking.

Signed-off-by: Pravin B Shelar <pshelar@...ira.com>
Signed-off-by: Jesse Gross <jesse@...ira.com>
---
v2/v3: Unchanged.
---
 include/linux/genetlink.h |    3 +++
 net/netlink/genetlink.c   |    8 ++++++++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/include/linux/genetlink.h b/include/linux/genetlink.h
index 61549b2..59311ad 100644
--- a/include/linux/genetlink.h
+++ b/include/linux/genetlink.h
@@ -85,6 +85,9 @@ enum {
 /* All generic netlink requests are serialized by a global lock.  */
 extern void genl_lock(void);
 extern void genl_unlock(void);
+#ifdef CONFIG_PROVE_LOCKING
+extern int lockdep_genl_is_held(void);
+#endif
 
 #endif /* __KERNEL__ */
 
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 8a36599..28453ae 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -33,6 +33,14 @@ void genl_unlock(void)
 }
 EXPORT_SYMBOL(genl_unlock);
 
+#ifdef CONFIG_PROVE_LOCKING
+int lockdep_genl_is_held(void)
+{
+	return lockdep_is_held(&genl_mutex);
+}
+EXPORT_SYMBOL(lockdep_genl_is_held);
+#endif
+
 #define GENL_FAM_TAB_SIZE	16
 #define GENL_FAM_TAB_MASK	(GENL_FAM_TAB_SIZE - 1)
 
-- 
1.7.5.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html