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| author | Chuang Wang <nashuiliang@gmail.com> | 2022-11-11 04:41:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-25 19:45:46 +0300 |
| commit | fb5ee1560babc51b3adb4a6239e79479838d71c6 (patch) | |
| tree | d40db3350d86f6c739d229efcb0586187d0d0f6d | |
| parent | 709aa1f73d3e9e9ea16e2c4e44f2874c5d2c382c (diff) | |
| download | linux-fb5ee1560babc51b3adb4a6239e79479838d71c6.tar.xz | |
net: macvlan: Use built-in RCU list checking
[ Upstream commit 5df1341ea822292275c56744aab9c536d75c33be ]
hlist_for_each_entry_rcu() has built-in RCU and lock checking.
Pass cond argument to hlist_for_each_entry_rcu() to silence false
lockdep warning when CONFIG_PROVE_RCU_LIST is enabled.
Execute as follow:
ip link add link eth0 type macvlan mode source macaddr add <MAC-ADDR>
The rtnl_lock is held when macvlan_hash_lookup_source() or
macvlan_fill_info_macaddr() are called in the non-RCU read side section.
So, pass lockdep_rtnl_is_held() to silence false lockdep warning.
Fixes: 79cf79abce71 ("macvlan: add source mode")
Signed-off-by: Chuang Wang <nashuiliang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/macvlan.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 6b269a72388b..5d6b4f76b519 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -139,7 +139,7 @@ static struct macvlan_source_entry *macvlan_hash_lookup_source( u32 idx = macvlan_eth_hash(addr); struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; - hlist_for_each_entry_rcu(entry, h, hlist) { + hlist_for_each_entry_rcu(entry, h, hlist, lockdep_rtnl_is_held()) { if (ether_addr_equal_64bits(entry->addr, addr) && entry->vlan == vlan) return entry; @@ -1614,7 +1614,7 @@ static int macvlan_fill_info_macaddr(struct sk_buff *skb, struct hlist_head *h = &vlan->port->vlan_source_hash[i]; struct macvlan_source_entry *entry; - hlist_for_each_entry_rcu(entry, h, hlist) { + hlist_for_each_entry_rcu(entry, h, hlist, lockdep_rtnl_is_held()) { if (entry->vlan != vlan) continue; if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) |