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Commit 86b1309c authored by Pravin B Shelar's avatar Pravin B Shelar Committed by Jesse Gross
Browse files

genetlink: Add lockdep_genl_is_held(). 



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: default avatarPravin B Shelar <pshelar@nicira.com>
Signed-off-by: default avatarJesse Gross <jesse@nicira.com>
parent 263ba61d

include/linux/genetlink.h

+3 −0
Original line number Original line Diff line number Diff line
@@ -85,6 +85,9 @@ enum { 
/* All generic netlink requests are serialized by a global lock.  */

/* All generic netlink requests are serialized by a global lock.  */

extern void genl_lock(void);

extern void genl_lock(void);

extern void genl_unlock(void);

extern void genl_unlock(void);

#ifdef CONFIG_PROVE_LOCKING

extern int lockdep_genl_is_held(void);

#endif





#endif /* __KERNEL__ */

#endif /* __KERNEL__ */

net/netlink/genetlink.c

+8 −0
Original line number Original line Diff line number Diff line
@@ -33,6 +33,14 @@ void genl_unlock(void) 
}

}

EXPORT_SYMBOL(genl_unlock);

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_SIZE	16

#define GENL_FAM_TAB_MASK	(GENL_FAM_TAB_SIZE - 1)

#define GENL_FAM_TAB_MASK	(GENL_FAM_TAB_SIZE - 1)