From: Vladimir Oltean <vladimir.oltean@nxp.com>
To: Roopa Prabhu <roopa@nvidia.com>,
Nikolay Aleksandrov <nikolay@nvidia.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
bridge@lists.linux-foundation.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next] net: bridge: explicitly convert between mdb entry state and port group flags
Date: Thu, 29 Oct 2020 01:48:15 +0200 [thread overview]
Message-ID: <20201028234815.613226-1-vladimir.oltean@nxp.com> (raw)
When creating a new multicast port group, there is implicit conversion
between the __u8 state member of struct br_mdb_entry and the unsigned
char flags member of struct net_bridge_port_group. This implicit
conversion relies on the fact that MDB_PERMANENT is equal to
MDB_PG_FLAGS_PERMANENT.
Let's be more explicit and convert the state to flags manually.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
net/bridge/br_mdb.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 3c8863418d0b..8846c5bcd075 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -846,6 +846,7 @@ static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
struct net_bridge_port_group __rcu **pp;
struct br_ip group, star_group;
unsigned long now = jiffies;
+ unsigned char flags = 0;
u8 filter_mode;
int err;
@@ -904,7 +905,10 @@ static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
filter_mode = br_multicast_is_star_g(&group) ? MCAST_EXCLUDE :
MCAST_INCLUDE;
- p = br_multicast_new_port_group(port, &group, *pp, entry->state, NULL,
+ if (entry->state == MDB_PERMANENT)
+ flags |= MDB_PG_FLAGS_PERMANENT;
+
+ p = br_multicast_new_port_group(port, &group, *pp, flags, NULL,
filter_mode, RTPROT_STATIC);
if (unlikely(!p)) {
NL_SET_ERR_MSG_MOD(extack, "Couldn't allocate new port group");
--
2.25.1
next reply other threads:[~2020-10-28 23:49 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-28 23:48 Vladimir Oltean [this message]
2020-10-31 0:59 ` [PATCH net-next] net: bridge: explicitly convert between mdb entry state and port group flags Jakub Kicinski
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