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net: sched: Avoid implicit chain 0 creation

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Currently, chain 0 is implicitly created during block creation. However
that does not align with chain object exposure, creation and destruction
api introduced later on. So make the chain 0 behave the same way as any
other chain and only create it when it is needed. Since chain 0 is
somehow special as the qdiscs need to hold pointer to the first chain
tp, this requires to move the chain head change callback infra to the
block structure.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko
2018-07-23 09:23:05 +02:00
committed by David S. Miller
parent f34e8bff58
commit f71e0ca4db
2 changed files with 43 additions and 48 deletions
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5
include/net/sch_generic.h
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@@ -300,7 +300,6 @@ typedef void tcf_chain_head_change_t(struct tcf_proto *tp_head, void *priv);
struct tcf_chain {
struct tcf_proto __rcu *filter_chain;
struct list_head filter_chain_list;
struct list_head list;
struct tcf_block *block;
u32 index; /* chain index */
@@ -318,6 +317,10 @@ struct tcf_block {
bool keep_dst;
unsigned int offloadcnt; /* Number of oddloaded filters */
unsigned int nooffloaddevcnt; /* Number of devs unable to do offload */
struct {
struct tcf_chain *chain;
struct list_head filter_chain_list;
} chain0;
};
static inline void tcf_block_offload_inc(struct tcf_block *block, u32 *flags)