diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2024-10-09 10:09:53 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-10 17:30:22 +0200 |
| commit | ff7d4deb1f3e18b983cb51fc2dcb7af57991d827 (patch) | |
| tree | 5a079cb0fbf48d9ef3db54a4e3f162767e02246f /net/shaper | |
| parent | net-shapers: implement delete support for NODE scope shaper (diff) | |
| download | linux-ff7d4deb1f3e18b983cb51fc2dcb7af57991d827.tar.xz linux-ff7d4deb1f3e18b983cb51fc2dcb7af57991d827.zip | |
net-shapers: implement shaper cleanup on queue deletion
hook into netif_set_real_num_tx_queues() to cleanup any shaper
configured on top of the to-be-destroyed TX queues.
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/6da4ee03cae2b2a757d7b59e88baf09cc94c5ef1.1728460186.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/shaper')
| -rw-r--r-- | net/shaper/shaper.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/net/shaper/shaper.c b/net/shaper/shaper.c index ddd1999b3f27..85ad172833fc 100644 --- a/net/shaper/shaper.c +++ b/net/shaper/shaper.c @@ -1157,6 +1157,54 @@ void net_shaper_flush_netdev(struct net_device *dev) net_shaper_flush(&binding); } +void net_shaper_set_real_num_tx_queues(struct net_device *dev, + unsigned int txq) +{ + struct net_shaper_hierarchy *hierarchy; + struct net_shaper_binding binding; + int i; + + binding.type = NET_SHAPER_BINDING_TYPE_NETDEV; + binding.netdev = dev; + hierarchy = net_shaper_hierarchy(&binding); + if (!hierarchy) + return; + + /* Only drivers implementing shapers support ensure + * the lock is acquired in advance. + */ + lockdep_assert_held(&dev->lock); + + /* Take action only when decreasing the tx queue number. */ + for (i = txq; i < dev->real_num_tx_queues; ++i) { + struct net_shaper_handle handle, parent_handle; + struct net_shaper *shaper; + u32 index; + + handle.scope = NET_SHAPER_SCOPE_QUEUE; + handle.id = i; + shaper = net_shaper_lookup(&binding, &handle); + if (!shaper) + continue; + + /* Don't touch the H/W for the queue shaper, the drivers already + * deleted the queue and related resources. + */ + parent_handle = shaper->parent; + index = net_shaper_handle_to_index(&handle); + xa_erase(&hierarchy->shapers, index); + kfree_rcu(shaper, rcu); + + /* The recursion on parent does the full job. */ + if (parent_handle.scope != NET_SHAPER_SCOPE_NODE) + continue; + + shaper = net_shaper_lookup(&binding, &parent_handle); + if (shaper && !--shaper->leaves) + __net_shaper_delete(&binding, shaper, NULL); + } +} + static int __init shaper_init(void) { return genl_register_family(&net_shaper_nl_family); |