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Message-Id: <20210315171342.232809-3-razor@blackwall.org>
Date: Mon, 15 Mar 2021 19:13:42 +0200
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: netdev@...r.kernel.org
Cc: roopa@...dia.com, bridge@...ts.linux-foundation.org,
kuba@...nel.org, davem@...emloft.net,
Nikolay Aleksandrov <nikolay@...dia.com>
Subject: [PATCH net-next v2 2/2] net: bridge: mcast: factor out common allow/block EHT handling
From: Nikolay Aleksandrov <nikolay@...dia.com>
We hande EHT state change for ALLOW messages in INCLUDE mode and for
BLOCK messages in EXCLUDE mode similarly - create the new set entries
with the proper filter mode. We also handle EHT state change for ALLOW
messages in EXCLUDE mode and for BLOCK messages in INCLUDE mode in a
similar way - delete the common entries (current set and new set).
Factor out all the common code as follows:
- ALLOW/INCLUDE, BLOCK/EXCLUDE: call __eht_create_set_entries()
- ALLOW/EXCLUDE, BLOCK/INCLUDE: call __eht_del_common_set_entries()
The set entries creation can be reused in __eht_inc_exc() as well.
Signed-off-by: Nikolay Aleksandrov <nikolay@...dia.com>
---
net/bridge/br_multicast_eht.c | 98 ++++++++++-------------------------
1 file changed, 27 insertions(+), 71 deletions(-)
diff --git a/net/bridge/br_multicast_eht.c b/net/bridge/br_multicast_eht.c
index 982398e44658..13290a749d09 100644
--- a/net/bridge/br_multicast_eht.c
+++ b/net/bridge/br_multicast_eht.c
@@ -498,11 +498,13 @@ static void br_multicast_del_eht_host(struct net_bridge_port_group *pg,
&set_h->h_addr);
}
-static void __eht_allow_incl(struct net_bridge_port_group *pg,
- union net_bridge_eht_addr *h_addr,
- void *srcs,
- u32 nsrcs,
- size_t addr_size)
+/* create new set entries from reports */
+static void __eht_create_set_entries(struct net_bridge_port_group *pg,
+ union net_bridge_eht_addr *h_addr,
+ void *srcs,
+ u32 nsrcs,
+ size_t addr_size,
+ int filter_mode)
{
union net_bridge_eht_addr eht_src_addr;
u32 src_idx;
@@ -511,16 +513,17 @@ static void __eht_allow_incl(struct net_bridge_port_group *pg,
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
memcpy(&eht_src_addr, srcs + (src_idx * addr_size), addr_size);
br_multicast_create_eht_set_entry(pg, &eht_src_addr, h_addr,
- MCAST_INCLUDE,
+ filter_mode,
false);
}
}
-static bool __eht_allow_excl(struct net_bridge_port_group *pg,
- union net_bridge_eht_addr *h_addr,
- void *srcs,
- u32 nsrcs,
- size_t addr_size)
+/* delete existing set entries and their (S,G) entries if they were the last */
+static bool __eht_del_set_entries(struct net_bridge_port_group *pg,
+ union net_bridge_eht_addr *h_addr,
+ void *srcs,
+ u32 nsrcs,
+ size_t addr_size)
{
union net_bridge_eht_addr eht_src_addr;
struct net_bridge_group_src *src_ent;
@@ -529,10 +532,11 @@ static bool __eht_allow_excl(struct net_bridge_port_group *pg,
u32 src_idx;
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 (!br_multicast_del_eht_set_entry(pg, &eht_src_addr,
- h_addr))
+ 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);
@@ -555,64 +559,18 @@ static bool br_multicast_eht_allow(struct net_bridge_port_group *pg,
switch (br_multicast_eht_host_filter_mode(pg, h_addr)) {
case MCAST_INCLUDE:
- __eht_allow_incl(pg, h_addr, srcs, nsrcs, addr_size);
+ __eht_create_set_entries(pg, h_addr, srcs, nsrcs, addr_size,
+ MCAST_INCLUDE);
break;
case MCAST_EXCLUDE:
- changed = __eht_allow_excl(pg, h_addr, srcs, nsrcs, addr_size);
+ changed = __eht_del_set_entries(pg, h_addr, srcs, nsrcs,
+ addr_size);
break;
}
return changed;
}
-static bool __eht_block_incl(struct net_bridge_port_group *pg,
- union net_bridge_eht_addr *h_addr,
- void *srcs,
- u32 nsrcs,
- size_t addr_size)
-{
- 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;
-
- 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 (!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;
-}
-
-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)
-{
- union net_bridge_eht_addr eht_src_addr;
- u32 src_idx;
-
- 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);
- br_multicast_create_eht_set_entry(pg, &eht_src_addr, h_addr,
- MCAST_EXCLUDE,
- false);
- }
-}
-
static bool br_multicast_eht_block(struct net_bridge_port_group *pg,
union net_bridge_eht_addr *h_addr,
void *srcs,
@@ -623,10 +581,12 @@ static bool br_multicast_eht_block(struct net_bridge_port_group *pg,
switch (br_multicast_eht_host_filter_mode(pg, h_addr)) {
case MCAST_INCLUDE:
- changed = __eht_block_incl(pg, h_addr, srcs, nsrcs, addr_size);
+ changed = __eht_del_set_entries(pg, h_addr, srcs, nsrcs,
+ addr_size);
break;
case MCAST_EXCLUDE:
- __eht_block_excl(pg, h_addr, srcs, nsrcs, addr_size);
+ __eht_create_set_entries(pg, h_addr, srcs, nsrcs, addr_size,
+ MCAST_EXCLUDE);
break;
}
@@ -644,7 +604,6 @@ static bool __eht_inc_exc(struct net_bridge_port_group *pg,
{
bool changed = false, flush_entries = to_report;
union net_bridge_eht_addr eht_src_addr;
- u32 src_idx;
if (br_multicast_eht_host_filter_mode(pg, h_addr) != filter_mode)
flush_entries = true;
@@ -653,11 +612,8 @@ static bool __eht_inc_exc(struct net_bridge_port_group *pg,
/* if we're changing mode del host and its entries */
if (flush_entries)
br_multicast_del_eht_host(pg, h_addr);
- for (src_idx = 0; src_idx < nsrcs; src_idx++) {
- memcpy(&eht_src_addr, srcs + (src_idx * addr_size), addr_size);
- br_multicast_create_eht_set_entry(pg, &eht_src_addr, h_addr,
- filter_mode, false);
- }
+ __eht_create_set_entries(pg, h_addr, srcs, nsrcs, addr_size,
+ filter_mode);
/* we can be missing sets only if we've deleted some entries */
if (flush_entries) {
struct net_bridge *br = pg->key.port->br;
--
2.29.2
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