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net: bridge: multicast: calculate idx position without changing ptr

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We need to preserve the srcs pointer since we'll be passing it for EHT
handling later.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nikolay Aleksandrov 2021-01-20 16:51:53 +02:00 committed by Jakub Kicinski
parent 0ad57c99e8
commit e7cfcf2c18
1 changed files with 9 additions and 18 deletions
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27
net/bridge/br_multicast.c
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@ -1812,7 +1812,7 @@ static bool br_multicast_isinc_allow(struct net_bridge_port_group *pg, void *h_a
memset(&src_ip, 0, sizeof(src_ip));
src_ip.proto = pg->key.addr.proto;
for (src_idx = 0; src_idx < nsrcs; src_idx++) {
memcpy(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (!ent) {
ent = br_multicast_new_group_src(pg, &src_ip);
@ -1822,7 +1822,6 @@ static bool br_multicast_isinc_allow(struct net_bridge_port_group *pg, void *h_a
if (ent)
__grp_src_mod_timer(ent, now + br_multicast_gmi(br));
srcs += addr_size;
}
return changed;
@ -1846,7 +1845,7 @@ static void __grp_src_isexc_incl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (ent)
ent->flags &= ~BR_SGRP_F_DELETE;
@ -1854,7 +1853,6 @@ static void __grp_src_isexc_incl(struct net_bridge_port_group *pg, void *h_addr,
ent = br_multicast_new_group_src(pg, &src_ip);
if (ent)
br_multicast_fwd_src_handle(ent);
srcs += addr_size;
}
__grp_src_delete_marked(pg);
@ -1882,7 +1880,7 @@ static bool __grp_src_isexc_excl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (ent) {
ent->flags &= ~BR_SGRP_F_DELETE;
@ -1894,7 +1892,6 @@ static bool __grp_src_isexc_excl(struct net_bridge_port_group *pg, void *h_addr,
changed = true;
}
}
srcs += addr_size;
}
if (__grp_src_delete_marked(pg))
@ -1946,7 +1943,7 @@ static bool __grp_src_toin_incl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (ent) {
ent->flags &= ~BR_SGRP_F_SEND;
@ -1958,7 +1955,6 @@ static bool __grp_src_toin_incl(struct net_bridge_port_group *pg, void *h_addr,
}
if (ent)
__grp_src_mod_timer(ent, now + br_multicast_gmi(br));
srcs += addr_size;
}
if (to_send)
@ -1989,7 +1985,7 @@ static bool __grp_src_toin_excl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (ent) {
if (timer_pending(&ent->timer)) {
@ -2003,7 +1999,6 @@ static bool __grp_src_toin_excl(struct net_bridge_port_group *pg, void *h_addr,
}
if (ent)
__grp_src_mod_timer(ent, now + br_multicast_gmi(br));
srcs += addr_size;
}
if (to_send)
@ -2050,7 +2045,7 @@ static void __grp_src_toex_incl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (ent) {
ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
@ -2061,7 +2056,6 @@ static void __grp_src_toex_incl(struct net_bridge_port_group *pg, void *h_addr,
}
if (ent)
br_multicast_fwd_src_handle(ent);
srcs += addr_size;
}
__grp_src_delete_marked(pg);
@ -2090,7 +2084,7 @@ static bool __grp_src_toex_excl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (ent) {
ent->flags &= ~BR_SGRP_F_DELETE;
@ -2105,7 +2099,6 @@ static bool __grp_src_toex_excl(struct net_bridge_port_group *pg, void *h_addr,
ent->flags |= BR_SGRP_F_SEND;
to_send++;
}
srcs += addr_size;
}
if (__grp_src_delete_marked(pg))
@ -2156,13 +2149,12 @@ static bool __grp_src_block_incl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (ent) {
ent->flags |= BR_SGRP_F_SEND;
to_send++;
}
srcs += addr_size;
}
if (to_send)
@ -2197,7 +2189,7 @@ static bool __grp_src_block_excl(struct net_bridge_port_group *pg, void *h_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(&src_ip.src, srcs, addr_size);
memcpy(&src_ip.src, srcs + (src_idx * addr_size), addr_size);
ent = br_multicast_find_group_src(pg, &src_ip);
if (!ent) {
ent = br_multicast_new_group_src(pg, &src_ip);
@ -2210,7 +2202,6 @@ static bool __grp_src_block_excl(struct net_bridge_port_group *pg, void *h_addr,
ent->flags |= BR_SGRP_F_SEND;
to_send++;
}
srcs += addr_size;
}
if (to_send)