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flow_offload: allow user to offload tc action to net device

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Use flow_indr_dev_register/flow_indr_dev_setup_offload to
offload tc action.

We need to call tc_cleanup_flow_action to clean up tc action entry since
in tc_setup_action, some actions may hold dev refcnt, especially the mirror
action.

Signed-off-by: Baowen Zheng <baowen.zheng@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Baowen Zheng
2021-12-17 19:16:22 +01:00
committed by David S. Miller
parent c54e1d920f
commit 8cbfe939ab
17 changed files with 254 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
net/core/flow_offload.c
View File

@@ -27,6 +27,26 @@ struct flow_rule *flow_rule_alloc(unsigned int num_actions)
}
EXPORT_SYMBOL(flow_rule_alloc);
struct flow_offload_action *offload_action_alloc(unsigned int num_actions)
{
struct flow_offload_action *fl_action;
int i;
fl_action = kzalloc(struct_size(fl_action, action.entries, num_actions),
GFP_KERNEL);
if (!fl_action)
return NULL;
fl_action->action.num_entries = num_actions;
/* Pre-fill each action hw_stats with DONT_CARE.
* Caller can override this if it wants stats for a given action.
*/
for (i = 0; i < num_actions; i++)
fl_action->action.entries[i].hw_stats = FLOW_ACTION_HW_STATS_DONT_CARE;
return fl_action;
}
#define FLOW_DISSECTOR_MATCH(__rule, __type, __out) \
const struct flow_match *__m = &(__rule)->match; \
struct flow_dissector *__d = (__m)->dissector; \
@@ -549,19 +569,25 @@ int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
void (*cleanup)(struct flow_block_cb *block_cb))
{
struct flow_indr_dev *this;
u32 count = 0;
int err;
mutex_lock(&flow_indr_block_lock);
if (bo) {
if (bo->command == FLOW_BLOCK_BIND)
indir_dev_add(data, dev, sch, type, cleanup, bo);
else if (bo->command == FLOW_BLOCK_UNBIND)
indir_dev_remove(data);
}
if (bo->command == FLOW_BLOCK_BIND)
indir_dev_add(data, dev, sch, type, cleanup, bo);
else if (bo->command == FLOW_BLOCK_UNBIND)
indir_dev_remove(data);
list_for_each_entry(this, &flow_block_indr_dev_list, list)
this->cb(dev, sch, this->cb_priv, type, bo, data, cleanup);
list_for_each_entry(this, &flow_block_indr_dev_list, list) {
err = this->cb(dev, sch, this->cb_priv, type, bo, data, cleanup);
if (!err)
count++;
}
mutex_unlock(&flow_indr_block_lock);
return list_empty(&bo->cb_list) ? -EOPNOTSUPP : 0;
return (bo && list_empty(&bo->cb_list)) ? -EOPNOTSUPP : count;
}
EXPORT_SYMBOL(flow_indr_dev_setup_offload);