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| author | Linus Lüssing <linus.luessing@web.de> | 2011-03-14 22:43:37 +0000 |
|---|---|---|
| committer | Sven Eckelmann <sven@narfation.org> | 2011-04-17 21:11:01 +0200 |
| commit | e1a5382f978b67b5cc36eec65e6046730ce07714 (patch) | |
| tree | f7ca07cde3a49858d0cfa33e0189a659a1fcc95d /net/batman-adv/types.h | |
| parent | 57f0c07c4d0da8bcc23e21c330fe9c7c5cf776b5 (diff) | |
| download | blackbird-obmc-linux-e1a5382f978b67b5cc36eec65e6046730ce07714.tar.gz blackbird-obmc-linux-e1a5382f978b67b5cc36eec65e6046730ce07714.zip | |
batman-adv: Make orig_node->router an rcu protected pointer
The rcu protected macros rcu_dereference() and rcu_assign_pointer()
for the orig_node->router need to be used, as well as spin/rcu locking.
Otherwise we might end up using a router pointer pointing to already
freed memory.
Therefore this commit introduces the safe getter method
orig_node_get_router().
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Diffstat (limited to 'net/batman-adv/types.h')
| -rw-r--r-- | net/batman-adv/types.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 83445cf0cc9f..1854cbb4c1b6 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -67,7 +67,7 @@ struct hard_iface { struct orig_node { uint8_t orig[ETH_ALEN]; uint8_t primary_addr[ETH_ALEN]; - struct neigh_node *router; + struct neigh_node __rcu *router; /* rcu protected pointer */ unsigned long *bcast_own; uint8_t *bcast_own_sum; unsigned long last_valid; @@ -83,7 +83,7 @@ struct orig_node { uint32_t last_bcast_seqno; struct hlist_head neigh_list; struct list_head frag_list; - spinlock_t neigh_list_lock; /* protects neighbor list */ + spinlock_t neigh_list_lock; /* protects neigh_list and router */ atomic_t refcount; struct rcu_head rcu; struct hlist_node hash_entry; |
