linux-stable/net/xfrm
Florian Westphal e1e551bc56 xfrm: policy: prepare policy_bydst hash for rcu lookups
Since commit 56f047305d
("xfrm: add rcu grace period in xfrm_policy_destroy()") xfrm policy
objects are already free'd via rcu.

In order to make more places lockless (i.e. use rcu_read_lock instead of
grabbing read-side of policy rwlock) we only need to:

- use rcu_assign_pointer to store address of new hash table backend memory
- add rcu barrier so that freeing of old memory is delayed (expansion
  and free happens from system workqueue, so synchronize_rcu is fine)
- use rcu_dereference to fetch current address of the hash table.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2016-08-12 08:07:11 +02:00
..
Kconfig
Makefile
xfrm_algo.c ipsec: Use skcipher and ahash when probing algorithms 2016-01-27 20:36:07 +08:00
xfrm_hash.c
xfrm_hash.h
xfrm_input.c xfrm: Fix crash observed during device unregistration and decryption 2016-03-24 14:29:36 -04:00
xfrm_ipcomp.c
xfrm_output.c xfrm: Reset encapsulation field of the skb before transformation 2016-03-17 10:28:44 +01:00
xfrm_policy.c xfrm: policy: prepare policy_bydst hash for rcu lookups 2016-08-12 08:07:11 +02:00
xfrm_proc.c
xfrm_replay.c xfrm: constify xfrm_replay structures 2016-08-10 11:18:49 +02:00
xfrm_state.c xfrm: state: don't use lock anymore unless acquire operation is needed 2016-08-10 11:23:24 +02:00
xfrm_sysctl.c
xfrm_user.c xfrm: align nlattr properly when needed 2016-04-23 20:13:25 -04:00