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| author | Yuval Mintz <yuvalm@mellanox.com> | 2018-03-26 15:01:36 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-26 13:14:43 -0400 |
| commit | 8c13af2a219c6498071b30ea558438c74267ae4d (patch) | |
| tree | 747dd0d7e4eb618fbacc0cbf27e7900d95618b75 /include/linux/mroute_base.h | |
| parent | d3c07e5b9939a055fa017f200e535ae947eb22ab (diff) | |
| download | lwn-8c13af2a219c6498071b30ea558438c74267ae4d.tar.gz lwn-8c13af2a219c6498071b30ea558438c74267ae4d.zip | |
ip6mr: Add refcounting to mfc
Since ipmr and ip6mr are using the same mr_mfc struct at their core, we
can now refactor the ipmr_cache_{hold,put} logic and apply refcounting
to both ipmr and ip6mr.
Signed-off-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/mroute_base.h')
| -rw-r--r-- | include/linux/mroute_base.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/mroute_base.h b/include/linux/mroute_base.h index 289eb5aa7b5d..d617fe45543e 100644 --- a/include/linux/mroute_base.h +++ b/include/linux/mroute_base.h @@ -125,6 +125,7 @@ enum { * @refcount: reference count for this entry * @list: global entry list * @rcu: used for entry destruction + * @free: Operation used for freeing an entry under RCU */ struct mr_mfc { struct rhlist_head mnode; @@ -150,8 +151,20 @@ struct mr_mfc { } mfc_un; struct list_head list; struct rcu_head rcu; + void (*free)(struct rcu_head *head); }; +static inline void mr_cache_put(struct mr_mfc *c) +{ + if (refcount_dec_and_test(&c->mfc_un.res.refcount)) + call_rcu(&c->rcu, c->free); +} + +static inline void mr_cache_hold(struct mr_mfc *c) +{ + refcount_inc(&c->mfc_un.res.refcount); +} + struct mfc_entry_notifier_info { struct fib_notifier_info info; struct mr_mfc *mfc; |