From 0fdcf78d59737939ea449b512d02c3733a22c8e1 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 29 May 2020 02:25:37 +0200 Subject: net: use flow_indr_dev_setup_offload() Update existing frontends to use flow_indr_dev_setup_offload(). This new function must be called if ->ndo_setup_tc is unset to deal with tunnel devices. If there is no driver that is subscribed to new tunnel device flow_block bindings, then this function bails out with EOPNOTSUPP. If the driver module is removed, the ->cleanup() callback removes the entries that belong to this tunnel device. This cleanup procedures is triggered when the device unregisters the tunnel device offload handler. Signed-off-by: Pablo Neira Ayuso Signed-off-by: David S. Miller --- net/sched/cls_api.c | 58 ++++++++++++++++++++++++++--------------------------- 1 file changed, 29 insertions(+), 29 deletions(-) (limited to 'net/sched') diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index c5a2f16097b6..760e51d852f5 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -709,24 +709,26 @@ static void tcf_block_offload_init(struct flow_block_offload *bo, INIT_LIST_HEAD(&bo->cb_list); } -static void tc_indr_block_call(struct tcf_block *block, - struct net_device *dev, - struct tcf_block_ext_info *ei, - enum flow_block_command command, - struct netlink_ext_ack *extack) +static void tcf_block_unbind(struct tcf_block *block, + struct flow_block_offload *bo); + +static void tc_block_indr_cleanup(struct flow_block_cb *block_cb) { - struct flow_block_offload bo = { - .command = command, - .binder_type = ei->binder_type, - .net = dev_net(dev), - .block = &block->flow_block, - .block_shared = tcf_block_shared(block), - .extack = extack, - }; - INIT_LIST_HEAD(&bo.cb_list); + struct tcf_block *block = block_cb->indr.data; + struct net_device *dev = block_cb->indr.dev; + struct netlink_ext_ack extack = {}; + struct flow_block_offload bo; - flow_indr_block_call(dev, &bo, command, TC_SETUP_BLOCK); - tcf_block_setup(block, &bo); + tcf_block_offload_init(&bo, dev, FLOW_BLOCK_UNBIND, + block_cb->indr.binder_type, + &block->flow_block, tcf_block_shared(block), + &extack); + down_write(&block->cb_lock); + list_move(&block_cb->list, &bo.cb_list); + up_write(&block->cb_lock); + rtnl_lock(); + tcf_block_unbind(block, &bo); + rtnl_unlock(); } static bool tcf_block_offload_in_use(struct tcf_block *block) @@ -747,7 +749,12 @@ static int tcf_block_offload_cmd(struct tcf_block *block, &block->flow_block, tcf_block_shared(block), extack); - err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_BLOCK, &bo); + if (dev->netdev_ops->ndo_setup_tc) + err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_BLOCK, &bo); + else + err = flow_indr_dev_setup_offload(dev, TC_SETUP_BLOCK, block, + &bo, tc_block_indr_cleanup); + if (err < 0) { if (err != -EOPNOTSUPP) NL_SET_ERR_MSG(extack, "Driver ndo_setup_tc failed"); @@ -765,13 +772,13 @@ static int tcf_block_offload_bind(struct tcf_block *block, struct Qdisc *q, int err; down_write(&block->cb_lock); - if (!dev->netdev_ops->ndo_setup_tc) - goto no_offload_dev_inc; /* If tc offload feature is disabled and the block we try to bind * to already has some offloaded filters, forbid to bind. */ - if (!tc_can_offload(dev) && tcf_block_offload_in_use(block)) { + if (dev->netdev_ops->ndo_setup_tc && + !tc_can_offload(dev) && + tcf_block_offload_in_use(block)) { NL_SET_ERR_MSG(extack, "Bind to offloaded block failed as dev has offload disabled"); err = -EOPNOTSUPP; goto err_unlock; @@ -783,18 +790,15 @@ static int tcf_block_offload_bind(struct tcf_block *block, struct Qdisc *q, if (err) goto err_unlock; - tc_indr_block_call(block, dev, ei, FLOW_BLOCK_BIND, extack); up_write(&block->cb_lock); return 0; no_offload_dev_inc: - if (tcf_block_offload_in_use(block)) { - err = -EOPNOTSUPP; + if (tcf_block_offload_in_use(block)) goto err_unlock; - } + err = 0; block->nooffloaddevcnt++; - tc_indr_block_call(block, dev, ei, FLOW_BLOCK_BIND, extack); err_unlock: up_write(&block->cb_lock); return err; @@ -807,10 +811,6 @@ static void tcf_block_offload_unbind(struct tcf_block *block, struct Qdisc *q, int err; down_write(&block->cb_lock); - tc_indr_block_call(block, dev, ei, FLOW_BLOCK_UNBIND, NULL); - - if (!dev->netdev_ops->ndo_setup_tc) - goto no_offload_dev_dec; err = tcf_block_offload_cmd(block, dev, ei, FLOW_BLOCK_UNBIND, NULL); if (err == -EOPNOTSUPP) goto no_offload_dev_dec; -- cgit v1.2.3