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net: sched: introduce block mechanism to handle netif_keep_dst calls

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Couple of classifiers call netif_keep_dst directly on q->dev. That is
not possible to do directly for shared blocke where multiple qdiscs are
owning the block. So introduce a infrastructure to keep track of the
block owners in list and use this list to implement block variant of
netif_keep_dst.

Signed-off-by: Jiri Pirko <[email protected]>
Acked-by: Jamal Hadi Salim <[email protected]>
Acked-by: David Ahern <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Jiri Pirko 2018-01-17 11:46:48 +01:00 • committed by David S. Miller
commit f36fe1c498
6 changed files with 76 additions and 4 deletions
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1
include/net/pkt_cls.h
View file

@ -39,6 +39,7 @@ bool tcf_queue_work(struct work_struct *work);
struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index,
bool create);
void tcf_chain_put(struct tcf_chain *chain);
void tcf_block_netif_keep_dst(struct tcf_block *block);
int tcf_block_get(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct netlink_ext_ack *extack);

2
include/net/sch_generic.h
View file

@ -289,6 +289,8 @@ struct tcf_block {
struct net *net;
struct Qdisc *q;
struct list_head cb_list;
struct list_head owner_list;
bool keep_dst;
};
static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)