Please use get_maintainers script to get list of ccs.
Mon, Sep 16, 2019 at 12:15:34PM CEST, we...@ucloud.cn wrote:
>From: wenxu <we...@ucloud.cn>
>
>When a block bind with a dev which support indr block call(vxlan/gretap
>device). It can bind success but with nooffloaddevcnt++. It will fail
>when replace the hw filter in tc_setup_cb_call with skip_sw mode for
>checkout the nooffloaddevcnt and skip_sw.
I read this paragraph 5 times, I still don't understand :( Could you
please re-phrase?
>
>if (block->nooffloaddevcnt && err_stop)
> return -EOPNOTSUPP;
>
>So with this patch, if the indr block call success, it will not modify
>the nooffloaddevcnt counter.
>
>Fixes: 7f76fa36754b ("net: sched: register callbacks for indirect tc block
>binds")
>Signed-off-by: wenxu <we...@ucloud.cn>
>---
> net/sched/cls_api.c | 27 +++++++++++++++------------
> 1 file changed, 15 insertions(+), 12 deletions(-)
>
>diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
>index efd3cfb..8a1e3a5 100644
>--- a/net/sched/cls_api.c
>+++ b/net/sched/cls_api.c
>@@ -766,10 +766,10 @@ void tc_indr_block_cb_unregister(struct net_device *dev,
> }
> EXPORT_SYMBOL_GPL(tc_indr_block_cb_unregister);
>
>-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 int 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)
> {
> struct tc_indr_block_cb *indr_block_cb;
> struct tc_indr_block_dev *indr_dev;
>@@ -785,7 +785,7 @@ static void tc_indr_block_call(struct tcf_block *block,
>struct net_device *dev,
>
> indr_dev = tc_indr_block_dev_lookup(dev);
> if (!indr_dev)
>- return;
>+ return -ENOENT;
>
> indr_dev->block = command == FLOW_BLOCK_BIND ? block : NULL;
>
>@@ -793,7 +793,10 @@ static void tc_indr_block_call(struct tcf_block *block,
>struct net_device *dev,
> indr_block_cb->cb(dev, indr_block_cb->cb_priv, TC_SETUP_BLOCK,
> &bo);
>
>- tcf_block_setup(block, &bo);
>+ if (list_empty(&bo.cb_list))
>+ return -EOPNOTSUPP;
How is this part related to the rest of the patch?
>+
>+ return tcf_block_setup(block, &bo);
> }
>
> static bool tcf_block_offload_in_use(struct tcf_block *block)
>@@ -849,14 +852,14 @@ static int tcf_block_offload_bind(struct tcf_block
>*block, struct Qdisc *q,
> if (err)
> return err;
>
>- tc_indr_block_call(block, dev, ei, FLOW_BLOCK_BIND, extack);
> return 0;
>
> no_offload_dev_inc:
> if (tcf_block_offload_in_use(block))
> return -EOPNOTSUPP;
>- block->nooffloaddevcnt++;
>- tc_indr_block_call(block, dev, ei, FLOW_BLOCK_BIND, extack);
>+ err = tc_indr_block_call(block, dev, ei, FLOW_BLOCK_BIND, extack);
>+ if (err)
>+ block->nooffloaddevcnt++;
> return 0;
> }
>
>@@ -866,8 +869,6 @@ static void tcf_block_offload_unbind(struct tcf_block
>*block, struct Qdisc *q,
> struct net_device *dev = q->dev_queue->dev;
> int err;
>
>- 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);
>@@ -876,7 +877,9 @@ static void tcf_block_offload_unbind(struct tcf_block
>*block, struct Qdisc *q,
> return;
>
> no_offload_dev_dec:
>- WARN_ON(block->nooffloaddevcnt-- == 0);
>+ err = tc_indr_block_call(block, dev, ei, FLOW_BLOCK_UNBIND, NULL);
>+ if (err)
>+ WARN_ON(block->nooffloaddevcnt-- == 0);
> }
>
> static int
>--
>1.8.3.1
>
