From 531027fcddbcf81c9937dd04f08a7e8f11fd47d2 Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 19 Oct 2011 11:02:25 +0200 Subject: batman-adv: remove references for global tt entries struct tt_global_entry holds a reference to an orig_node which must be decremented before deallocating the structure. Signed-off-by: Simon Wunderlich Tested-by: Alexey Fisher Signed-off-by: Marek Lindner --- net/batman-adv/translation-table.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index ef1acfd7653..ca537ed2dd0 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -137,10 +137,22 @@ static void tt_local_entry_free_ref(struct tt_local_entry *tt_local_entry) kfree_rcu(tt_local_entry, rcu); } +static void tt_global_entry_free_rcu(struct rcu_head *rcu) +{ + struct tt_global_entry *tt_global_entry; + + tt_global_entry = container_of(rcu, struct tt_global_entry, rcu); + + if (tt_global_entry->orig_node) + orig_node_free_ref(tt_global_entry->orig_node); + + kfree(tt_global_entry); +} + static void tt_global_entry_free_ref(struct tt_global_entry *tt_global_entry) { if (atomic_dec_and_test(&tt_global_entry->refcount)) - kfree_rcu(tt_global_entry, rcu); + call_rcu(&tt_global_entry->rcu, tt_global_entry_free_rcu); } static void tt_local_event(struct bat_priv *bat_priv, const uint8_t *addr, -- cgit v1.2.3 From 6e8014947d6469df1566e9e253805557c5c0e4e0 Mon Sep 17 00:00:00 2001 From: Simon Wunderlich Date: Wed, 19 Oct 2011 10:28:26 +0200 Subject: batman-adv: add sanity check when removing global tts After removing the batman-adv module, the hash may be already gone when tt_global_del_orig() tries to clean the hash. This patch adds a sanity check to avoid this. Signed-off-by: Simon Wunderlich Tested-by: Alexey Fisher Signed-off-by: Marek Lindner --- net/batman-adv/translation-table.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net') diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c index ca537ed2dd0..d58fd8b9c81 100644 --- a/net/batman-adv/translation-table.c +++ b/net/batman-adv/translation-table.c @@ -698,6 +698,9 @@ void tt_global_del_orig(struct bat_priv *bat_priv, struct hlist_head *head; spinlock_t *list_lock; /* protects write access to the hash lists */ + if (!hash) + return; + for (i = 0; i < hash->size; i++) { head = &hash->table[i]; list_lock = &hash->list_locks[i]; -- cgit v1.2.3 From 93840ac40bb0d0f177ef8af74e64671be67e8c37 Mon Sep 17 00:00:00 2001 From: Antonio Quartulli Date: Sat, 22 Oct 2011 00:55:39 +0200 Subject: batman-adv: unify hash_entry field position in tt_local/global_entry Function tt_response_fill_table() actually uses a tt_local_entry pointer to iterate either over the local or the global table entries (it depends on the what hash table is passed as argument). To iterate over such entries the hlist_for_each_entry_rcu() macro has to access their "hash_entry" field which MUST be at the same position in both the tt_global/local_entry structures. Reported-by: Simon Wunderlich Signed-off-by: Antonio Quartulli Signed-off-by: Marek Lindner --- net/batman-adv/types.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 25bd1db3537..51a0db7f644 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -223,22 +223,22 @@ struct socket_packet { struct tt_local_entry { uint8_t addr[ETH_ALEN]; + struct hlist_node hash_entry; unsigned long last_seen; uint16_t flags; atomic_t refcount; struct rcu_head rcu; - struct hlist_node hash_entry; }; struct tt_global_entry { uint8_t addr[ETH_ALEN]; + struct hlist_node hash_entry; /* entry in the global table */ struct orig_node *orig_node; uint8_t ttvn; uint16_t flags; /* only TT_GLOBAL_ROAM is used */ unsigned long roam_at; /* time at which TT_GLOBAL_ROAM was set */ atomic_t refcount; struct rcu_head rcu; - struct hlist_node hash_entry; /* entry in the global table */ }; struct tt_change_node { -- cgit v1.2.3