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sfc: Insert multicast filters as well as mismatch filters in promiscuous mode

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If a function is in promiscuous mode and another function has a broadcast or
 multicast filter inserted, the function in promiscuous mode won't see that
 broadcast or multicast traffic.
Most notably this breaks broadcast, which means ARP doesn't work. Less
 show-stoppingly, a function listening on a multicast address that's also in
 promiscuous mode will not see that multicast traffic if another function is
 also listening on that multicast address.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Cooper 2015-07-21 15:10:15 +01:00 committed by David S. Miller
parent 5a55a72abe
commit b6f568e27b
1 changed files with 53 additions and 51 deletions
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104
drivers/net/ethernet/sfc/ef10.c
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@ -3758,7 +3758,8 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
struct netdev_hw_addr *uc;
struct netdev_hw_addr *mc;
unsigned int filter_idx;
int i, n, rc;
int i, rc;
bool uc_promisc = false, mc_promisc = false;
if (!efx_dev_registered(efx))
return;
@ -3768,13 +3769,11 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
/* Mark old filters that may need to be removed */
spin_lock_bh(&efx->filter_lock);
n = table->dev_uc_count < 0 ? 1 : table->dev_uc_count;
for (i = 0; i < n; i++) {
for (i = 0; i < table->dev_uc_count; i++) {
filter_idx = table->dev_uc_list[i].id % HUNT_FILTER_TBL_ROWS;
table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_AUTO_OLD;
}
n = table->dev_mc_count < 0 ? 1 : table->dev_mc_count;
for (i = 0; i < n; i++) {
for (i = 0; i < table->dev_mc_count; i++) {
filter_idx = table->dev_mc_list[i].id % HUNT_FILTER_TBL_ROWS;
table->entry[filter_idx].spec |= EFX_EF10_FILTER_FLAG_AUTO_OLD;
}
@ -3786,7 +3785,8 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
netif_addr_lock_bh(net_dev);
if (net_dev->flags & IFF_PROMISC ||
netdev_uc_count(net_dev) >= EFX_EF10_FILTER_DEV_UC_MAX) {
table->dev_uc_count = -1;
table->dev_uc_count = 0;
uc_promisc = true;
} else {
table->dev_uc_count = 1 + netdev_uc_count(net_dev);
ether_addr_copy(table->dev_uc_list[0].addr, net_dev->dev_addr);
@ -3796,9 +3796,11 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
i++;
}
}
if (net_dev->flags & (IFF_PROMISC | IFF_ALLMULTI) ||
netdev_mc_count(net_dev) >= EFX_EF10_FILTER_DEV_MC_MAX) {
table->dev_mc_count = -1;
if (netdev_mc_count(net_dev) + 2 /* room for broadcast and promisc */
>= EFX_EF10_FILTER_DEV_MC_MAX) {
table->dev_mc_count = 1;
eth_broadcast_addr(table->dev_mc_list[0].addr);
mc_promisc = true;
} else {
table->dev_mc_count = 1 + netdev_mc_count(net_dev);
eth_broadcast_addr(table->dev_mc_list[0].addr);
@ -3807,31 +3809,32 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
ether_addr_copy(table->dev_mc_list[i].addr, mc->addr);
i++;
}
if (net_dev->flags & (IFF_PROMISC | IFF_ALLMULTI))
mc_promisc = true;
}
netif_addr_unlock_bh(net_dev);
/* Insert/renew unicast filters */
if (table->dev_uc_count >= 0) {
for (i = 0; i < table->dev_uc_count; i++) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC,
table->dev_uc_list[i].addr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
/* Fall back to unicast-promisc */
while (i--)
efx_ef10_filter_remove_safe(
efx, EFX_FILTER_PRI_AUTO,
table->dev_uc_list[i].id);
table->dev_uc_count = -1;
break;
}
table->dev_uc_list[i].id = rc;
for (i = 0; i < table->dev_uc_count; i++) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC,
table->dev_uc_list[i].addr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
/* Fall back to unicast-promisc */
while (i--)
efx_ef10_filter_remove_safe(
efx, EFX_FILTER_PRI_AUTO,
table->dev_uc_list[i].id);
table->dev_uc_count = 0;
uc_promisc = true;
break;
}
table->dev_uc_list[i].id = rc;
}
if (table->dev_uc_count < 0) {
if (uc_promisc) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
@ -3839,34 +3842,34 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
WARN_ON(1);
table->dev_uc_count = 0;
} else {
table->dev_uc_list[0].id = rc;
table->dev_uc_list[table->dev_uc_count++].id = rc;
}
}
/* Insert/renew multicast filters */
if (table->dev_mc_count >= 0) {
for (i = 0; i < table->dev_mc_count; i++) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC,
table->dev_mc_list[i].addr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
/* Fall back to multicast-promisc */
while (i--)
efx_ef10_filter_remove_safe(
efx, EFX_FILTER_PRI_AUTO,
table->dev_mc_list[i].id);
table->dev_mc_count = -1;
break;
}
table->dev_mc_list[i].id = rc;
for (i = 0; i < table->dev_mc_count; i++) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
efx_filter_set_eth_local(&spec, EFX_FILTER_VID_UNSPEC,
table->dev_mc_list[i].addr);
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
/* Fall back to multicast-promisc.
* Leave the broadcast filter.
*/
while (i > 1)
efx_ef10_filter_remove_safe(
efx, EFX_FILTER_PRI_AUTO,
table->dev_mc_list[--i].id);
table->dev_mc_count = i;
mc_promisc = true;
break;
}
table->dev_mc_list[i].id = rc;
}
if (table->dev_mc_count < 0) {
if (mc_promisc) {
efx_filter_init_rx(&spec, EFX_FILTER_PRI_AUTO,
EFX_FILTER_FLAG_RX_RSS,
0);
@ -3874,9 +3877,8 @@ static void efx_ef10_filter_sync_rx_mode(struct efx_nic *efx)
rc = efx_ef10_filter_insert(efx, &spec, true);
if (rc < 0) {
WARN_ON(1);
table->dev_mc_count = 0;
} else {
table->dev_mc_list[0].id = rc;
table->dev_mc_list[table->dev_mc_count++].id = rc;
}
}