There is no meaning to set an IGMP counter/timer to 0. Or it will cause
unexpected behavior. E.g. if set multicast_membership_interval to 0,
bridge will remove the mdb immediately after adding.
Fixes: 79b859f573d6 ("bridge: netlink: add support for
multicast_last_member_count")
Fixes: b89e6babad4b ("bridge: netlink: add support for
multicast_startup_query_count")
Fixes: 7e4df51eb35d ("bridge: netlink: add support for igmp's intervals")
Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
---
net/bridge/br_netlink.c | 73 +++++++++++++++++++++++++++++---------
net/bridge/br_sysfs_br.c | 75 +++++++++++++++++++++++++++++++---------
2 files changed, 116 insertions(+), 32 deletions(-)
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 5c6c4305ed23..d054936373ac 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -1168,6 +1168,7 @@ static int br_changelink(struct net_device *brdev, struct
nlattr *tb[],
struct netlink_ext_ack *extack)
{
struct net_bridge *br = netdev_priv(brdev);
+ struct net_bridge_mcast *brmctx = &br->multicast_ctx;
int err;
if (!data)
@@ -1287,8 +1288,7 @@ static int br_changelink(struct net_device *brdev, struct
nlattr *tb[],
if (data[IFLA_BR_MCAST_ROUTER]) {
u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
- err = br_multicast_set_router(&br->multicast_ctx,
- multicast_router);
+ err = br_multicast_set_router(brmctx, multicast_router);
if (err)
return err;
}
@@ -1311,8 +1311,7 @@ static int br_changelink(struct net_device *brdev, struct
nlattr *tb[],
if (data[IFLA_BR_MCAST_QUERIER]) {
u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
- err = br_multicast_set_querier(&br->multicast_ctx,
- mcast_querier);
+ err = br_multicast_set_querier(brmctx, mcast_querier);
if (err)
return err;
}
@@ -1327,49 +1326,93 @@ static int br_changelink(struct net_device *brdev,
struct nlattr *tb[],
if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
- br->multicast_ctx.multicast_last_member_count = val;
+ if (val) {
+ brmctx->multicast_last_member_count = val;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Last Member Count");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
- br->multicast_ctx.multicast_startup_query_count = val;
+ if (val) {
+ brmctx->multicast_startup_query_count = val;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Startup Query Count");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
- br->multicast_ctx.multicast_last_member_interval =
clock_t_to_jiffies(val);
+ if (val) {
+ brmctx->multicast_last_member_interval =
clock_t_to_jiffies(val);
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Last Member Interval");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
- br->multicast_ctx.multicast_membership_interval =
clock_t_to_jiffies(val);
+ if (val) {
+ brmctx->multicast_membership_interval =
clock_t_to_jiffies(val);
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Membership Interval");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
- br->multicast_ctx.multicast_querier_interval =
clock_t_to_jiffies(val);
+ if (val) {
+ brmctx->multicast_querier_interval =
clock_t_to_jiffies(val);
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Querier Interval");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
- br->multicast_ctx.multicast_query_interval =
clock_t_to_jiffies(val);
+ if (val && clock_t_to_jiffies(val) >
brmctx->multicast_query_response_interval) {
+ brmctx->multicast_query_interval =
clock_t_to_jiffies(val);
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Query Interval");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
- br->multicast_ctx.multicast_query_response_interval =
clock_t_to_jiffies(val);
+ /* RFC3376 8.3: The number of seconds represented by the
+ * [Query Response Interval] must be less than the [Query
+ * Interval].
+ */
+ if (val && clock_t_to_jiffies(val) <
brmctx->multicast_query_interval) {
+ brmctx->multicast_query_response_interval =
clock_t_to_jiffies(val);
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Query Response
Interval");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
- br->multicast_ctx.multicast_startup_query_interval =
clock_t_to_jiffies(val);
+ if (val) {
+ brmctx->multicast_startup_query_interval =
clock_t_to_jiffies(val);
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Startup Query
Interval");
+ return -EINVAL;
+ }
}
if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
@@ -1383,8 +1426,7 @@ static int br_changelink(struct net_device *brdev, struct
nlattr *tb[],
__u8 igmp_version;
igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
- err = br_multicast_set_igmp_version(&br->multicast_ctx,
- igmp_version);
+ err = br_multicast_set_igmp_version(brmctx, igmp_version);
if (err)
return err;
}
@@ -1394,8 +1436,7 @@ static int br_changelink(struct net_device *brdev, struct
nlattr *tb[],
__u8 mld_version;
mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
- err = br_multicast_set_mld_version(&br->multicast_ctx,
- mld_version);
+ err = br_multicast_set_mld_version(brmctx, mld_version);
if (err)
return err;
}
diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index d9a89ddd0331..e311aa651d03 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -542,8 +542,13 @@ static ssize_t multicast_last_member_count_show(struct
device *d,
static int set_last_member_count(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_last_member_count = val;
- return 0;
+ if (val) {
+ br->multicast_ctx.multicast_last_member_count = val;
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Last Member Count");
+ return -EINVAL;
+ }
}
static ssize_t multicast_last_member_count_store(struct device *d,
@@ -564,8 +569,13 @@ static ssize_t multicast_startup_query_count_show(
static int set_startup_query_count(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_startup_query_count = val;
- return 0;
+ if (val) {
+ br->multicast_ctx.multicast_startup_query_count = val;
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Startup Query Count");
+ return -EINVAL;
+ }
}
static ssize_t multicast_startup_query_count_store(
@@ -587,8 +597,13 @@ static ssize_t multicast_last_member_interval_show(
static int set_last_member_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_last_member_interval =
clock_t_to_jiffies(val);
- return 0;
+ if (val) {
+ br->multicast_ctx.multicast_last_member_interval =
clock_t_to_jiffies(val);
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Last Member Interval");
+ return -EINVAL;
+ }
}
static ssize_t multicast_last_member_interval_store(
@@ -610,8 +625,13 @@ static ssize_t multicast_membership_interval_show(
static int set_membership_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_membership_interval =
clock_t_to_jiffies(val);
- return 0;
+ if (val) {
+ br->multicast_ctx.multicast_membership_interval =
clock_t_to_jiffies(val);
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Membership Interval");
+ return -EINVAL;
+ }
}
static ssize_t multicast_membership_interval_store(
@@ -634,8 +654,13 @@ static ssize_t multicast_querier_interval_show(struct
device *d,
static int set_querier_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
- return 0;
+ if (val) {
+ br->multicast_ctx.multicast_querier_interval =
clock_t_to_jiffies(val);
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Querier Interval");
+ return -EINVAL;
+ }
}
static ssize_t multicast_querier_interval_store(struct device *d,
@@ -658,8 +683,13 @@ static ssize_t multicast_query_interval_show(struct device
*d,
static int set_query_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_query_interval = clock_t_to_jiffies(val);
- return 0;
+ if (val && clock_t_to_jiffies(val) >
br->multicast_ctx.multicast_query_response_interval) {
+ br->multicast_ctx.multicast_query_interval =
clock_t_to_jiffies(val);
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Query Interval");
+ return -EINVAL;
+ }
}
static ssize_t multicast_query_interval_store(struct device *d,
@@ -682,8 +712,16 @@ static ssize_t multicast_query_response_interval_show(
static int set_query_response_interval(struct net_bridge *br, unsigned long
val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_query_response_interval =
clock_t_to_jiffies(val);
- return 0;
+ /* RFC3376 8.3: The number of seconds represented by the
+ * [Query Response Interval] must be less than the [Query Interval].
+ */
+ if (val && clock_t_to_jiffies(val) <
br->multicast_ctx.multicast_query_interval) {
+ br->multicast_ctx.multicast_query_response_interval =
clock_t_to_jiffies(val);
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Query Response Interval");
+ return -EINVAL;
+ }
}
static ssize_t multicast_query_response_interval_store(
@@ -706,8 +744,13 @@ static ssize_t multicast_startup_query_interval_show(
static int set_startup_query_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
- br->multicast_ctx.multicast_startup_query_interval =
clock_t_to_jiffies(val);
- return 0;
+ if (val) {
+ br->multicast_ctx.multicast_startup_query_interval =
clock_t_to_jiffies(val);
+ return 0;
+ } else {
+ NL_SET_ERR_MSG(extack, "Invalid Startup Query Interval");
+ return -EINVAL;
+ }
}
static ssize_t multicast_startup_query_interval_store(
--
2.31.1
