diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/sfc/tc.c | 20 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tc.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tc_counters.c | 58 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/tc_counters.h | 3 |
4 files changed, 81 insertions, 1 deletions
diff --git a/drivers/net/ethernet/sfc/tc.c b/drivers/net/ethernet/sfc/tc.c index 77acdb60381e..15ebd3973922 100644 --- a/drivers/net/ethernet/sfc/tc.c +++ b/drivers/net/ethernet/sfc/tc.c @@ -110,8 +110,13 @@ static void efx_tc_free_action_set(struct efx_nic *efx, */ list_del(&act->list); } - if (act->count) + if (act->count) { + spin_lock_bh(&act->count->cnt->lock); + if (!list_empty(&act->count_user)) + list_del(&act->count_user); + spin_unlock_bh(&act->count->cnt->lock); efx_tc_flower_put_counter_index(efx, act->count); + } if (act->encap_md) { list_del(&act->encap_user); efx_tc_flower_release_encap_md(efx, act->encap_md); @@ -796,6 +801,7 @@ static int efx_tc_flower_replace_foreign(struct efx_nic *efx, goto release; } act->count = ctr; + INIT_LIST_HEAD(&act->count_user); } if (!efx_tc_flower_action_order_ok(act, EFX_TC_AO_DELIVER)) { @@ -1083,6 +1089,7 @@ static int efx_tc_flower_replace(struct efx_nic *efx, goto release; } act->count = ctr; + INIT_LIST_HEAD(&act->count_user); } switch (fa->id) { @@ -1120,6 +1127,17 @@ static int efx_tc_flower_replace(struct efx_nic *efx, list_add_tail(&act->encap_user, &encap->users); act->dest_mport = encap->dest_mport; act->deliver = 1; + if (act->count && !WARN_ON(!act->count->cnt)) { + /* This counter is used by an encap + * action, which needs a reference back + * so it can prod neighbouring whenever + * traffic is seen. + */ + spin_lock_bh(&act->count->cnt->lock); + list_add_tail(&act->count_user, + &act->count->cnt->users); + spin_unlock_bh(&act->count->cnt->lock); + } rc = efx_mae_alloc_action_set(efx, act); if (rc) { NL_SET_ERR_MSG_MOD(extack, "Failed to write action set to hw (encap)"); diff --git a/drivers/net/ethernet/sfc/tc.h b/drivers/net/ethernet/sfc/tc.h index 607429f8bb28..1549c3df43bb 100644 --- a/drivers/net/ethernet/sfc/tc.h +++ b/drivers/net/ethernet/sfc/tc.h @@ -38,6 +38,7 @@ struct efx_tc_action_set { struct efx_tc_encap_action *encap_md; /* entry in tc_encap_ht table */ struct list_head encap_user; /* entry on encap_md->users list */ struct efx_tc_action_set_list *user; /* Only populated if encap_md */ + struct list_head count_user; /* entry on counter->users list, if encap */ u32 dest_mport; u32 fw_id; /* index of this entry in firmware actions table */ struct list_head list; diff --git a/drivers/net/ethernet/sfc/tc_counters.c b/drivers/net/ethernet/sfc/tc_counters.c index d1a91d54c6bb..979f49058a0c 100644 --- a/drivers/net/ethernet/sfc/tc_counters.c +++ b/drivers/net/ethernet/sfc/tc_counters.c @@ -9,6 +9,7 @@ */ #include "tc_counters.h" +#include "tc_encap_actions.h" #include "mae_counter_format.h" #include "mae.h" #include "rx_common.h" @@ -31,6 +32,15 @@ static void efx_tc_counter_free(void *ptr, void *__unused) { struct efx_tc_counter *cnt = ptr; + WARN_ON(!list_empty(&cnt->users)); + /* We'd like to synchronize_rcu() here, but unfortunately we aren't + * removing the element from the hashtable (it's not clear that's a + * safe thing to do in an rhashtable_free_and_destroy free_fn), so + * threads could still be obtaining new pointers to *cnt if they can + * race against this function at all. + */ + flush_work(&cnt->work); + EFX_WARN_ON_PARANOID(spin_is_locked(&cnt->lock)); kfree(cnt); } @@ -74,6 +84,49 @@ void efx_tc_fini_counters(struct efx_nic *efx) rhashtable_free_and_destroy(&efx->tc->counter_ht, efx_tc_counter_free, NULL); } +static void efx_tc_counter_work(struct work_struct *work) +{ + struct efx_tc_counter *cnt = container_of(work, struct efx_tc_counter, work); + struct efx_tc_encap_action *encap; + struct efx_tc_action_set *act; + unsigned long touched; + struct neighbour *n; + + spin_lock_bh(&cnt->lock); + touched = READ_ONCE(cnt->touched); + + list_for_each_entry(act, &cnt->users, count_user) { + encap = act->encap_md; + if (!encap) + continue; + if (!encap->neigh) /* can't happen */ + continue; + if (time_after_eq(encap->neigh->used, touched)) + continue; + encap->neigh->used = touched; + /* We have passed traffic using this ARP entry, so + * indicate to the ARP cache that it's still active + */ + if (encap->neigh->dst_ip) + n = neigh_lookup(&arp_tbl, &encap->neigh->dst_ip, + encap->neigh->egdev); + else +#if IS_ENABLED(CONFIG_IPV6) + n = neigh_lookup(ipv6_stub->nd_tbl, + &encap->neigh->dst_ip6, + encap->neigh->egdev); +#else + n = NULL; +#endif + if (!n) + continue; + + neigh_event_send(n, NULL); + neigh_release(n); + } + spin_unlock_bh(&cnt->lock); +} + /* Counter allocation */ static struct efx_tc_counter *efx_tc_flower_allocate_counter(struct efx_nic *efx, @@ -87,12 +140,14 @@ static struct efx_tc_counter *efx_tc_flower_allocate_counter(struct efx_nic *efx return ERR_PTR(-ENOMEM); spin_lock_init(&cnt->lock); + INIT_WORK(&cnt->work, efx_tc_counter_work); cnt->touched = jiffies; cnt->type = type; rc = efx_mae_allocate_counter(efx, cnt); if (rc) goto fail1; + INIT_LIST_HEAD(&cnt->users); rc = rhashtable_insert_fast(&efx->tc->counter_ht, &cnt->linkage, efx_tc_counter_ht_params); if (rc) @@ -126,6 +181,7 @@ static void efx_tc_flower_release_counter(struct efx_nic *efx, netif_warn(efx, hw, efx->net_dev, "Failed to free MAE counter %u, rc %d\n", cnt->fw_id, rc); + WARN_ON(!list_empty(&cnt->users)); /* This doesn't protect counter updates coming in arbitrarily long * after we deleted the counter. The RCU just ensures that we won't * free the counter while another thread has a pointer to it. @@ -133,6 +189,7 @@ static void efx_tc_flower_release_counter(struct efx_nic *efx, * is handled by the generation count. */ synchronize_rcu(); + flush_work(&cnt->work); EFX_WARN_ON_PARANOID(spin_is_locked(&cnt->lock)); kfree(cnt); } @@ -302,6 +359,7 @@ static void efx_tc_counter_update(struct efx_nic *efx, cnt->touched = jiffies; } spin_unlock_bh(&cnt->lock); + schedule_work(&cnt->work); out: rcu_read_unlock(); } diff --git a/drivers/net/ethernet/sfc/tc_counters.h b/drivers/net/ethernet/sfc/tc_counters.h index 8fc7c4bbb29c..41e57f34b763 100644 --- a/drivers/net/ethernet/sfc/tc_counters.h +++ b/drivers/net/ethernet/sfc/tc_counters.h @@ -32,6 +32,9 @@ struct efx_tc_counter { u64 old_packets, old_bytes; /* Values last time passed to userspace */ /* jiffies of the last time we saw packets increase */ unsigned long touched; + struct work_struct work; /* For notifying encap actions */ + /* owners of corresponding count actions */ + struct list_head users; }; struct efx_tc_counter_index { |