[net-next] net: bridge: mcast: remove unreachable EHT code

Commit Message

Nikolay Aleksandrov March 15, 2021, 3:38 p.m. UTC

From: Nikolay Aleksandrov <[e-mail]>

In the initial EHT versions there were common functions which handled
allow/block messages for both INCLUDE and EXCLUDE modes, but later they
were separated. It seems I've left some common code which cannot be
reached because the filter mode is checked before calling the respective
functions, i.e. the host filter is always in EXCLUDE mode when using
__eht_allow_excl() and __eht_block_excl() thus we can drop the host_excl
checks inside and simplify the code a bit.

Signed-off-by: Nikolay Aleksandrov <[e-mail]>
---
 net/bridge/br_multicast_eht.c | 54 ++++++++++-------------------------
 1 file changed, 15 insertions(+), 39 deletions(-)

Comments

Nikolay Aleksandrov March 15, 2021, 3:44 p.m. UTC | #1

On 15/03/2021 17:38, Nikolay Aleksandrov wrote:
> From: Nikolay Aleksandrov <[e-mail]>
> 
> In the initial EHT versions there were common functions which handled
> allow/block messages for both INCLUDE and EXCLUDE modes, but later they
> were separated. It seems I've left some common code which cannot be
> reached because the filter mode is checked before calling the respective
> functions, i.e. the host filter is always in EXCLUDE mode when using
> __eht_allow_excl() and __eht_block_excl() thus we can drop the host_excl
> checks inside and simplify the code a bit.
> 
> Signed-off-by: Nikolay Aleksandrov <[e-mail]>
> ---
>  net/bridge/br_multicast_eht.c | 54 ++++++++++-------------------------
>  1 file changed, 15 insertions(+), 39 deletions(-)
> 

Oh well, sent the wrong patch version. I'll send the proper version as v2.
Self-NAK and sorry for the noise

Patch

diff --git a/net/bridge/br_multicast_eht.c b/net/bridge/br_multicast_eht.c
index fea38b9a7268..7a72567377ba 100644
--- a/net/bridge/br_multicast_eht.c
+++ b/net/bridge/br_multicast_eht.c
@@ -522,31 +522,24 @@  static bool __eht_allow_excl(struct net_bridge_port_group *pg,
 			     u32 nsrcs,
 			     size_t addr_size)
 {
-	bool changed = false, host_excl = false;
 	union net_bridge_eht_addr eht_src_addr;
 	struct net_bridge_group_src *src_ent;
+	bool changed = false;
 	struct br_ip src_ip;
 	u32 src_idx;
 
-	host_excl = !!(br_multicast_eht_host_filter_mode(pg, h_addr) == MCAST_EXCLUDE);
 	memset(&eht_src_addr, 0, sizeof(eht_src_addr));
 	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
 		memcpy(&eht_src_addr, srcs + (src_idx * addr_size), addr_size);
-		if (!host_excl) {
-			br_multicast_create_eht_set_entry(pg, &eht_src_addr, h_addr,
-							  MCAST_INCLUDE,
-							  false);
-		} else {
-			if (!br_multicast_del_eht_set_entry(pg, &eht_src_addr,
-							    h_addr))
-				continue;
-			memcpy(&src_ip, srcs + (src_idx * addr_size), addr_size);
-			src_ent = br_multicast_find_group_src(pg, &src_ip);
-			if (!src_ent)
-				continue;
-			br_multicast_del_group_src(src_ent, true);
-			changed = true;
-		}
+		if (!br_multicast_del_eht_set_entry(pg, &eht_src_addr,
+						    h_addr))
+			continue;
+		memcpy(&src_ip, srcs + (src_idx * addr_size), addr_size);
+		src_ent = br_multicast_find_group_src(pg, &src_ip);
+		if (!src_ent)
+			continue;
+		br_multicast_del_group_src(src_ent, true);
+		changed = true;
 	}
 
 	return changed;
@@ -602,42 +595,25 @@  static bool __eht_block_incl(struct net_bridge_port_group *pg,
 	return changed;
 }
 
-static bool __eht_block_excl(struct net_bridge_port_group *pg,
+static void __eht_block_excl(struct net_bridge_port_group *pg,
 			     union net_bridge_eht_addr *h_addr,
 			     void *srcs,
 			     u32 nsrcs,
 			     size_t addr_size)
 {
-	bool changed = false, host_excl = false;
 	union net_bridge_eht_addr eht_src_addr;
-	struct net_bridge_group_src *src_ent;
 	struct br_ip src_ip;
 	u32 src_idx;
 
-	host_excl = !!(br_multicast_eht_host_filter_mode(pg, h_addr) == MCAST_EXCLUDE);
 	memset(&eht_src_addr, 0, sizeof(eht_src_addr));
 	memset(&src_ip, 0, sizeof(src_ip));
 	src_ip.proto = pg->key.addr.proto;
 	for (src_idx = 0; src_idx < nsrcs; src_idx++) {
 		memcpy(&eht_src_addr, srcs + (src_idx * addr_size), addr_size);
-		if (host_excl) {
-			br_multicast_create_eht_set_entry(pg, &eht_src_addr, h_addr,
-							  MCAST_EXCLUDE,
-							  false);
-		} else {
-			if (!br_multicast_del_eht_set_entry(pg, &eht_src_addr,
-							    h_addr))
-				continue;
-			memcpy(&src_ip, srcs + (src_idx * addr_size), addr_size);
-			src_ent = br_multicast_find_group_src(pg, &src_ip);
-			if (!src_ent)
-				continue;
-			br_multicast_del_group_src(src_ent, true);
-			changed = true;
-		}
+		br_multicast_create_eht_set_entry(pg, &eht_src_addr, h_addr,
+						  MCAST_EXCLUDE,
+						  false);
 	}
-
-	return changed;
 }
 
 static bool br_multicast_eht_block(struct net_bridge_port_group *pg,
@@ -653,7 +629,7 @@  static bool br_multicast_eht_block(struct net_bridge_port_group *pg,
 		changed = __eht_block_incl(pg, h_addr, srcs, nsrcs, addr_size);
 		break;
 	case MCAST_EXCLUDE:
-		changed = __eht_block_excl(pg, h_addr, srcs, nsrcs, addr_size);
+		__eht_block_excl(pg, h_addr, srcs, nsrcs, addr_size);
 		break;
 	}