net: sched: fix notifications for action-held chains

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Chains that only have action references serve as placeholders.
Until a non-action reference is created, user should not be aware
of the chain. Also he should not receive any notifications about it.
So send notifications for the new chain only in case the chain gets
the first non-action reference. Symmetrically to that, when
the last non-action reference is dropped, send the notification about
deleted chain.

Reported-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>

v1->v2:
- made __tcf_chain_{get,put}() static as suggested by Cong

Signed-off-by: David S. Miller <davem@davemloft.net>

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Jiri Pirko 2018-08-01 12:36:56 +02:00 • committed by David S. Miller

parent 3d32f4c548

commit 5368140730

1 changed files with 43 additions and 28 deletions

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net/sched/cls_api.c

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