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authorPablo Neira Ayuso <pablo@netfilter.org>2019-07-09 22:55:45 +0200
committerDavid S. Miller <davem@davemloft.net>2019-07-09 14:38:50 -0700
commit59094b1e5094c7e50a3d2912202fd30b6a1dadf8 (patch)
treefd5cb245326da378d0a351b18e7fece4801561ad
parent67bd0d5ea7974d9dc9c502c7b4096e16a80a553d (diff)
downloadlinux-59094b1e5094c7e50a3d2912202fd30b6a1dadf8.tar.bz2
net: sched: use flow block API
This patch adds tcf_block_setup() which uses the flow block API. This infrastructure takes the flow block callbacks coming from the driver and register/unregister to/from the cls_api core. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/sched/cls_api.c88
1 files changed, 87 insertions, 1 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index ccbd51bed88c..f6602d0000e8 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -673,6 +673,9 @@ static void tc_indr_block_cb_del(struct tc_indr_block_cb *indr_block_cb)
kfree(indr_block_cb);
}
+static int tcf_block_setup(struct tcf_block *block,
+ struct flow_block_offload *bo);
+
static void tc_indr_block_ing_cmd(struct tc_indr_block_dev *indr_dev,
struct tc_indr_block_cb *indr_block_cb,
enum flow_block_command command)
@@ -683,12 +686,14 @@ static void tc_indr_block_ing_cmd(struct tc_indr_block_dev *indr_dev,
.net = dev_net(indr_dev->dev),
.block = indr_dev->block,
};
+ INIT_LIST_HEAD(&bo.cb_list);
if (!indr_dev->block)
return;
indr_block_cb->cb(indr_dev->dev, indr_block_cb->cb_priv, TC_SETUP_BLOCK,
&bo);
+ tcf_block_setup(indr_dev->block, &bo);
}
int __tc_indr_block_cb_register(struct net_device *dev, void *cb_priv,
@@ -773,6 +778,7 @@ static void tc_indr_block_call(struct tcf_block *block, struct net_device *dev,
.block = block,
.extack = extack,
};
+ INIT_LIST_HEAD(&bo.cb_list);
indr_dev = tc_indr_block_dev_lookup(dev);
if (!indr_dev)
@@ -783,6 +789,8 @@ static void tc_indr_block_call(struct tcf_block *block, struct net_device *dev,
list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
indr_block_cb->cb(dev, indr_block_cb->cb_priv, TC_SETUP_BLOCK,
&bo);
+
+ tcf_block_setup(block, &bo);
}
static bool tcf_block_offload_in_use(struct tcf_block *block)
@@ -797,13 +805,20 @@ static int tcf_block_offload_cmd(struct tcf_block *block,
struct netlink_ext_ack *extack)
{
struct tc_block_offload bo = {};
+ int err;
bo.net = dev_net(dev);
bo.command = command;
bo.binder_type = ei->binder_type;
bo.block = block;
bo.extack = extack;
- return dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_BLOCK, &bo);
+ INIT_LIST_HEAD(&bo.cb_list);
+
+ err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_BLOCK, &bo);
+ if (err < 0)
+ return err;
+
+ return tcf_block_setup(block, &bo);
}
static int tcf_block_offload_bind(struct tcf_block *block, struct Qdisc *q,
@@ -1637,6 +1652,77 @@ void tcf_block_cb_unregister(struct tcf_block *block,
}
EXPORT_SYMBOL(tcf_block_cb_unregister);
+static int tcf_block_bind(struct tcf_block *block,
+ struct flow_block_offload *bo)
+{
+ struct flow_block_cb *block_cb, *next;
+ int err, i = 0;
+
+ list_for_each_entry(block_cb, &bo->cb_list, list) {
+ err = tcf_block_playback_offloads(block, block_cb->cb,
+ block_cb->cb_priv, true,
+ tcf_block_offload_in_use(block),
+ bo->extack);
+ if (err)
+ goto err_unroll;
+
+ i++;
+ }
+ list_splice(&bo->cb_list, &block->cb_list);
+
+ return 0;
+
+err_unroll:
+ list_for_each_entry_safe(block_cb, next, &bo->cb_list, list) {
+ if (i-- > 0) {
+ list_del(&block_cb->list);
+ tcf_block_playback_offloads(block, block_cb->cb,
+ block_cb->cb_priv, false,
+ tcf_block_offload_in_use(block),
+ NULL);
+ }
+ flow_block_cb_free(block_cb);
+ }
+
+ return err;
+}
+
+static void tcf_block_unbind(struct tcf_block *block,
+ struct flow_block_offload *bo)
+{
+ struct flow_block_cb *block_cb, *next;
+
+ list_for_each_entry_safe(block_cb, next, &bo->cb_list, list) {
+ tcf_block_playback_offloads(block, block_cb->cb,
+ block_cb->cb_priv, false,
+ tcf_block_offload_in_use(block),
+ NULL);
+ list_del(&block_cb->list);
+ flow_block_cb_free(block_cb);
+ }
+}
+
+static int tcf_block_setup(struct tcf_block *block,
+ struct flow_block_offload *bo)
+{
+ int err;
+
+ switch (bo->command) {
+ case FLOW_BLOCK_BIND:
+ err = tcf_block_bind(block, bo);
+ break;
+ case FLOW_BLOCK_UNBIND:
+ err = 0;
+ tcf_block_unbind(block, bo);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ err = -EOPNOTSUPP;
+ }
+
+ return err;
+}
+
/* Main classifier routine: scans classifier chain attached
* to this qdisc, (optionally) tests for protocol and asks
* specific classifiers.